drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <target/target_core_base.h>
  31 #include <target/target_core_fabric.h>
  32
  33 #include "qla_def.h"
  34 #include "qla_target.h"
  35
  36 static int ql2xtgt_tape_enable;
  37 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  38 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  39                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  40
  41 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  42 module_param(qlini_mode, charp, S_IRUGO);
  43 MODULE_PARM_DESC(qlini_mode,
  44         "Determines when initiator mode will be enabled. Possible values: "
  45         "\"exclusive\" - initiator mode will be enabled on load, "
  46         "disabled on enabling target mode and then on disabling target mode "
  47         "enabled back; "
  48         "\"disabled\" - initiator mode will never be enabled; "
  49         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  50         "when ready "
  51         "\"enabled\" (default) - initiator mode will always stay enabled.");
  52
  53 static int ql_dm_tgt_ex_pct = 0;
  54 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  55 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  56         "For Dual Mode (qlini_mode=dual), this parameter determines "
  57         "the percentage of exchanges/cmds FW will allocate resources "
  58         "for Target mode.");
  59
  60 int ql2xuctrlirq = 1;
  61 module_param(ql2xuctrlirq, int, 0644);
  62 MODULE_PARM_DESC(ql2xuctrlirq,
  63     "User to control IRQ placement via smp_affinity."
  64     "Valid with qlini_mode=disabled."
  65     "1(default): enable");
  66
  67 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  68
  69 static int qla_sam_status = SAM_STAT_BUSY;
  70 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  71
  72 /*
  73  * From scsi/fc/fc_fcp.h
  74  */
  75 enum fcp_resp_rsp_codes {
  76         FCP_TMF_CMPL = 0,
  77         FCP_DATA_LEN_INVALID = 1,
  78         FCP_CMND_FIELDS_INVALID = 2,
  79         FCP_DATA_PARAM_MISMATCH = 3,
  80         FCP_TMF_REJECTED = 4,
  81         FCP_TMF_FAILED = 5,
  82         FCP_TMF_INVALID_LUN = 9,
  83 };
  84
  85 /*
  86  * fc_pri_ta from scsi/fc/fc_fcp.h
  87  */
  88 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  89 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  90 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  91 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  92 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  93 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  94 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  95
  96 /*
  97  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  98  * must be called under HW lock and could unlock/lock it inside.
  99  * It isn't an issue, since in the current implementation on the time when
 100  * those functions are called:
 101  *
 102  *   - Either context is IRQ and only IRQ handler can modify HW data,
 103  *     including rings related fields,
 104  *
 105  *   - Or access to target mode variables from struct qla_tgt doesn't
 106  *     cross those functions boundaries, except tgt_stop, which
 107  *     additionally protected by irq_cmd_count.
 108  */
 109 /* Predefs for callbacks handed to qla2xxx LLD */
 110 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 111         struct atio_from_isp *pkt, uint8_t);
 112 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 113         response_t *pkt);
 114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 115         int fn, void *iocb, int flags);
 116 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 117         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 118 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 119         struct atio_from_isp *atio, uint16_t status, int qfull);
 120 static void qlt_disable_vha(struct scsi_qla_host *vha);
 121 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 122 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 123         struct imm_ntfy_from_isp *ntfy,
 124         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 125         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 126 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 127         struct imm_ntfy_from_isp *imm, int ha_locked);
 128 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 129         fc_port_t *fcport, bool local);
 130 void qlt_unreg_sess(struct fc_port *sess);
 131 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 132         struct abts_recv_from_24xx *);
 133 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 134     uint16_t);
 135 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 136 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 137
 138 /*
 139  * Global Variables
 140  */
 141 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 142 struct kmem_cache *qla_tgt_plogi_cachep;
 143 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 144 static struct workqueue_struct *qla_tgt_wq;
 145 static DEFINE_MUTEX(qla_tgt_mutex);
 146 static LIST_HEAD(qla_tgt_glist);
 147
 148 static const char *prot_op_str(u32 prot_op)
 149 {
 150         switch (prot_op) {
 151         case TARGET_PROT_NORMAL:        return "NORMAL";
 152         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 153         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 154         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 155         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 156         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 157         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 158         default:                        return "UNKNOWN";
 159         }
 160 }
 161
 162 /* This API intentionally takes dest as a parameter, rather than returning
 163  * int value to avoid caller forgetting to issue wmb() after the store */
 164 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 165 {
 166         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 167         *dest = atomic_inc_return(&base_vha->generation_tick);
 168         /* memory barrier */
 169         wmb();
 170 }
 171
 172 /* Might release hw lock, then reaquire!! */
 173 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 174 {
 175         /* Send marker if required */
 176         if (unlikely(vha->marker_needed != 0)) {
 177                 int rc = qla2x00_issue_marker(vha, vha_locked);
 178
 179                 if (rc != QLA_SUCCESS) {
 180                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 181                             "qla_target(%d): issue_marker() failed\n",
 182                             vha->vp_idx);
 183                 }
 184                 return rc;
 185         }
 186         return QLA_SUCCESS;
 187 }
 188
 189 static inline
 190 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 191                                             be_id_t d_id)
 192 {
 193         struct scsi_qla_host *host;
 194         uint32_t key;
 195
 196         if (vha->d_id.b.area == d_id.area &&
 197             vha->d_id.b.domain == d_id.domain &&
 198             vha->d_id.b.al_pa == d_id.al_pa)
 199                 return vha;
 200
 201         key = be_to_port_id(d_id).b24;
 202
 203         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 204         if (!host)
 205                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 206                     "Unable to find host %06x\n", key);
 207
 208         return host;
 209 }
 210
 211 static inline
 212 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 213         uint16_t vp_idx)
 214 {
 215         struct qla_hw_data *ha = vha->hw;
 216
 217         if (vha->vp_idx == vp_idx)
 218                 return vha;
 219
 220         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 221         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 222                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 223
 224         return NULL;
 225 }
 226
 227 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 228 {
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 232
 233         vha->hw->tgt.num_pend_cmds++;
 234         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 235                 vha->qla_stats.stat_max_pend_cmds =
 236                         vha->hw->tgt.num_pend_cmds;
 237         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 238 }
 239 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 240 {
 241         unsigned long flags;
 242
 243         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 244         vha->hw->tgt.num_pend_cmds--;
 245         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 246 }
 247
 248
 249 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 250         struct atio_from_isp *atio, uint8_t ha_locked)
 251 {
 252         struct qla_tgt_sess_op *u;
 253         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 254         unsigned long flags;
 255
 256         if (tgt->tgt_stop) {
 257                 ql_dbg(ql_dbg_async, vha, 0x502c,
 258                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 259                     vha->vp_idx);
 260                 goto out_term;
 261         }
 262
 263         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 264         if (u == NULL)
 265                 goto out_term;
 266
 267         u->vha = vha;
 268         memcpy(&u->atio, atio, sizeof(*atio));
 269         INIT_LIST_HEAD(&u->cmd_list);
 270
 271         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 272         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 273         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 274
 275         schedule_delayed_work(&vha->unknown_atio_work, 1);
 276
 277 out:
 278         return;
 279
 280 out_term:
 281         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 282         goto out;
 283 }
 284
 285 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 286         uint8_t ha_locked)
 287 {
 288         struct qla_tgt_sess_op *u, *t;
 289         scsi_qla_host_t *host;
 290         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 291         unsigned long flags;
 292         uint8_t queued = 0;
 293
 294         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 295                 if (u->aborted) {
 296                         ql_dbg(ql_dbg_async, vha, 0x502e,
 297                             "Freeing unknown %s %p, because of Abort\n",
 298                             "ATIO_TYPE7", u);
 299                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 300                             &u->atio, ha_locked, 0);
 301                         goto abort;
 302                 }
 303
 304                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 305                 if (host != NULL) {
 306                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 307                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 308                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 309                 } else if (tgt->tgt_stop) {
 310                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 311                             "Freeing unknown %s %p, because tgt is being stopped\n",
 312                             "ATIO_TYPE7", u);
 313                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 314                             &u->atio, ha_locked, 0);
 315                 } else {
 316                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 317                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 318                         if (!queued) {
 319                                 queued = 1;
 320                                 schedule_delayed_work(&vha->unknown_atio_work,
 321                                     1);
 322                         }
 323                         continue;
 324                 }
 325
 326 abort:
 327                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 328                 list_del(&u->cmd_list);
 329                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 330                 kfree(u);
 331         }
 332 }
 333
 334 void qlt_unknown_atio_work_fn(struct work_struct *work)
 335 {
 336         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 337             struct scsi_qla_host, unknown_atio_work);
 338
 339         qlt_try_to_dequeue_unknown_atios(vha, 0);
 340 }
 341
 342 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 343         struct atio_from_isp *atio, uint8_t ha_locked)
 344 {
 345         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 346                 "%s: qla_target(%d): type %x ox_id %04x\n",
 347                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 348                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 349
 350         switch (atio->u.raw.entry_type) {
 351         case ATIO_TYPE7:
 352         {
 353                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 354                     atio->u.isp24.fcp_hdr.d_id);
 355                 if (unlikely(NULL == host)) {
 356                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 357                             "qla_target(%d): Received ATIO_TYPE7 "
 358                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 359                             atio->u.isp24.fcp_hdr.d_id.domain,
 360                             atio->u.isp24.fcp_hdr.d_id.area,
 361                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 362
 363
 364                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 365                         break;
 366                 }
 367                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 368                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 369
 370                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 371                 break;
 372         }
 373
 374         case IMMED_NOTIFY_TYPE:
 375         {
 376                 struct scsi_qla_host *host = vha;
 377                 struct imm_ntfy_from_isp *entry =
 378                     (struct imm_ntfy_from_isp *)atio;
 379
 380                 qlt_issue_marker(vha, ha_locked);
 381
 382                 if ((entry->u.isp24.vp_index != 0xFF) &&
 383                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 384                         host = qlt_find_host_by_vp_idx(vha,
 385                             entry->u.isp24.vp_index);
 386                         if (unlikely(!host)) {
 387                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 388                                     "qla_target(%d): Received "
 389                                     "ATIO (IMMED_NOTIFY_TYPE) "
 390                                     "with unknown vp_index %d\n",
 391                                     vha->vp_idx, entry->u.isp24.vp_index);
 392                                 break;
 393                         }
 394                 }
 395                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 396                 break;
 397         }
 398
 399         case VP_RPT_ID_IOCB_TYPE:
 400                 qla24xx_report_id_acquisition(vha,
 401                         (struct vp_rpt_id_entry_24xx *)atio);
 402                 break;
 403
 404         case ABTS_RECV_24XX:
 405         {
 406                 struct abts_recv_from_24xx *entry =
 407                         (struct abts_recv_from_24xx *)atio;
 408                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 409                         entry->vp_index);
 410                 unsigned long flags;
 411
 412                 if (unlikely(!host)) {
 413                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 414                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 415                             "received, with unknown vp_index %d\n",
 416                             vha->vp_idx, entry->vp_index);
 417                         break;
 418                 }
 419                 if (!ha_locked)
 420                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 421                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 422                 if (!ha_locked)
 423                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 424                 break;
 425         }
 426
 427         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 428
 429         default:
 430                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 431                     "qla_target(%d): Received unknown ATIO atio "
 432                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 433                 break;
 434         }
 435
 436         return false;
 437 }
 438
 439 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 440         struct rsp_que *rsp, response_t *pkt)
 441 {
 442         switch (pkt->entry_type) {
 443         case CTIO_CRC2:
 444                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 445                         "qla_target(%d):%s: CRC2 Response pkt\n",
 446                         vha->vp_idx, __func__);
 447                 /* fall through */
 448         case CTIO_TYPE7:
 449         {
 450                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 451                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 452                     entry->vp_index);
 453                 if (unlikely(!host)) {
 454                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 455                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 456                             "received, with unknown vp_index %d\n",
 457                             vha->vp_idx, entry->vp_index);
 458                         break;
 459                 }
 460                 qlt_response_pkt(host, rsp, pkt);
 461                 break;
 462         }
 463
 464         case IMMED_NOTIFY_TYPE:
 465         {
 466                 struct scsi_qla_host *host = vha;
 467                 struct imm_ntfy_from_isp *entry =
 468                     (struct imm_ntfy_from_isp *)pkt;
 469
 470                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 471                 if (unlikely(!host)) {
 472                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 473                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 474                             "received, with unknown vp_index %d\n",
 475                             vha->vp_idx, entry->u.isp24.vp_index);
 476                         break;
 477                 }
 478                 qlt_response_pkt(host, rsp, pkt);
 479                 break;
 480         }
 481
 482         case NOTIFY_ACK_TYPE:
 483         {
 484                 struct scsi_qla_host *host = vha;
 485                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 486
 487                 if (0xFF != entry->u.isp24.vp_index) {
 488                         host = qlt_find_host_by_vp_idx(vha,
 489                             entry->u.isp24.vp_index);
 490                         if (unlikely(!host)) {
 491                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 492                                     "qla_target(%d): Response "
 493                                     "pkt (NOTIFY_ACK_TYPE) "
 494                                     "received, with unknown "
 495                                     "vp_index %d\n", vha->vp_idx,
 496                                     entry->u.isp24.vp_index);
 497                                 break;
 498                         }
 499                 }
 500                 qlt_response_pkt(host, rsp, pkt);
 501                 break;
 502         }
 503
 504         case ABTS_RECV_24XX:
 505         {
 506                 struct abts_recv_from_24xx *entry =
 507                     (struct abts_recv_from_24xx *)pkt;
 508                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 509                     entry->vp_index);
 510                 if (unlikely(!host)) {
 511                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 512                             "qla_target(%d): Response pkt "
 513                             "(ABTS_RECV_24XX) received, with unknown "
 514                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 515                         break;
 516                 }
 517                 qlt_response_pkt(host, rsp, pkt);
 518                 break;
 519         }
 520
 521         case ABTS_RESP_24XX:
 522         {
 523                 struct abts_resp_to_24xx *entry =
 524                     (struct abts_resp_to_24xx *)pkt;
 525                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 526                     entry->vp_index);
 527                 if (unlikely(!host)) {
 528                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 529                             "qla_target(%d): Response pkt "
 530                             "(ABTS_RECV_24XX) received, with unknown "
 531                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 532                         break;
 533                 }
 534                 qlt_response_pkt(host, rsp, pkt);
 535                 break;
 536         }
 537         default:
 538                 qlt_response_pkt(vha, rsp, pkt);
 539                 break;
 540         }
 541
 542 }
 543
 544 /*
 545  * All qlt_plogi_ack_t operations are protected by hardware_lock
 546  */
 547 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 548         struct imm_ntfy_from_isp *ntfy, int type)
 549 {
 550         struct qla_work_evt *e;
 551
 552         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 553         if (!e)
 554                 return QLA_FUNCTION_FAILED;
 555
 556         e->u.nack.fcport = fcport;
 557         e->u.nack.type = type;
 558         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 559         return qla2x00_post_work(vha, e);
 560 }
 561
 562 static
 563 void qla2x00_async_nack_sp_done(void *s, int res)
 564 {
 565         struct srb *sp = (struct srb *)s;
 566         struct scsi_qla_host *vha = sp->vha;
 567         unsigned long flags;
 568
 569         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 570             "Async done-%s res %x %8phC  type %d\n",
 571             sp->name, res, sp->fcport->port_name, sp->type);
 572
 573         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 574         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 575         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 576
 577         switch (sp->type) {
 578         case SRB_NACK_PLOGI:
 579                 sp->fcport->login_gen++;
 580                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 581                 sp->fcport->logout_on_delete = 1;
 582                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 583                 sp->fcport->send_els_logo = 0;
 584                 break;
 585
 586         case SRB_NACK_PRLI:
 587                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 588                 sp->fcport->deleted = 0;
 589                 sp->fcport->send_els_logo = 0;
 590
 591                 if (!sp->fcport->login_succ &&
 592                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 593                         sp->fcport->login_succ = 1;
 594
 595                         vha->fcport_count++;
 596                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 597                         qla24xx_sched_upd_fcport(sp->fcport);
 598                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 599                 } else {
 600                         sp->fcport->login_retry = 0;
 601                         sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
 602                         sp->fcport->deleted = 0;
 603                         sp->fcport->logout_on_delete = 1;
 604                 }
 605                 break;
 606
 607         case SRB_NACK_LOGO:
 608                 sp->fcport->login_gen++;
 609                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 610                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 611                 break;
 612         }
 613         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 614
 615         sp->free(sp);
 616 }
 617
 618 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 619         struct imm_ntfy_from_isp *ntfy, int type)
 620 {
 621         int rval = QLA_FUNCTION_FAILED;
 622         srb_t *sp;
 623         char *c = NULL;
 624
 625         fcport->flags |= FCF_ASYNC_SENT;
 626         switch (type) {
 627         case SRB_NACK_PLOGI:
 628                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 629                 c = "PLOGI";
 630                 break;
 631         case SRB_NACK_PRLI:
 632                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 633                 fcport->deleted = 0;
 634                 c = "PRLI";
 635                 break;
 636         case SRB_NACK_LOGO:
 637                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 638                 c = "LOGO";
 639                 break;
 640         }
 641
 642         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 643         if (!sp)
 644                 goto done;
 645
 646         sp->type = type;
 647         sp->name = "nack";
 648
 649         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 650         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 651
 652         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 653         sp->done = qla2x00_async_nack_sp_done;
 654
 655         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 656             "Async-%s %8phC hndl %x %s\n",
 657             sp->name, fcport->port_name, sp->handle, c);
 658
 659         rval = qla2x00_start_sp(sp);
 660         if (rval != QLA_SUCCESS)
 661                 goto done_free_sp;
 662
 663         return rval;
 664
 665 done_free_sp:
 666         sp->free(sp);
 667 done:
 668         fcport->flags &= ~FCF_ASYNC_SENT;
 669         return rval;
 670 }
 671
 672 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 673 {
 674         fc_port_t *t;
 675
 676         switch (e->u.nack.type) {
 677         case SRB_NACK_PRLI:
 678                 t = e->u.nack.fcport;
 679                 flush_work(&t->del_work);
 680                 flush_work(&t->free_work);
 681                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 682                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 683                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 684                 if (t) {
 685                         ql_log(ql_log_info, vha, 0xd034,
 686                             "%s create sess success %p", __func__, t);
 687                         /* create sess has an extra kref */
 688                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 689                 }
 690                 break;
 691         }
 692         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 693             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 694 }
 695
 696 void qla24xx_delete_sess_fn(struct work_struct *work)
 697 {
 698         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 699         struct qla_hw_data *ha = fcport->vha->hw;
 700
 701         if (fcport->se_sess) {
 702                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 703                 ha->tgt.tgt_ops->put_sess(fcport);
 704         } else {
 705                 qlt_unreg_sess(fcport);
 706         }
 707 }
 708
 709 /*
 710  * Called from qla2x00_reg_remote_port()
 711  */
 712 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 713 {
 714         struct qla_hw_data *ha = vha->hw;
 715         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 716         struct fc_port *sess = fcport;
 717         unsigned long flags;
 718
 719         if (!vha->hw->tgt.tgt_ops)
 720                 return;
 721
 722         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 723         if (tgt->tgt_stop) {
 724                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 725                 return;
 726         }
 727
 728         if (fcport->disc_state == DSC_DELETE_PEND) {
 729                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 730                 return;
 731         }
 732
 733         if (!sess->se_sess) {
 734                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 735
 736                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 737                 sess = qlt_create_sess(vha, fcport, false);
 738                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 739
 740                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 741         } else {
 742                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 743                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 744                         return;
 745                 }
 746
 747                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 748                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 749                             "%s: kref_get fail sess %8phC \n",
 750                             __func__, sess->port_name);
 751                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 752                         return;
 753                 }
 754
 755                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 756                     "qla_target(%u): %ssession for port %8phC "
 757                     "(loop ID %d) reappeared\n", vha->vp_idx,
 758                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 759
 760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 761                     "Reappeared sess %p\n", sess);
 762
 763                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 764                     fcport->loop_id,
 765                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 766         }
 767
 768         if (sess && sess->local) {
 769                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 770                     "qla_target(%u): local session for "
 771                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 772                     fcport->port_name, sess->loop_id);
 773                 sess->local = 0;
 774         }
 775         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 776
 777         ha->tgt.tgt_ops->put_sess(sess);
 778 }
 779
 780 /*
 781  * This is a zero-base ref-counting solution, since hardware_lock
 782  * guarantees that ref_count is not modified concurrently.
 783  * Upon successful return content of iocb is undefined
 784  */
 785 static struct qlt_plogi_ack_t *
 786 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 787                        struct imm_ntfy_from_isp *iocb)
 788 {
 789         struct qlt_plogi_ack_t *pla;
 790
 791         lockdep_assert_held(&vha->hw->hardware_lock);
 792
 793         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 794                 if (pla->id.b24 == id->b24) {
 795                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 796                             "%s %d %8phC Term INOT due to new INOT",
 797                             __func__, __LINE__,
 798                             pla->iocb.u.isp24.port_name);
 799                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 800                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 801                         return pla;
 802                 }
 803         }
 804
 805         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 806         if (!pla) {
 807                 ql_dbg(ql_dbg_async, vha, 0x5088,
 808                        "qla_target(%d): Allocation of plogi_ack failed\n",
 809                        vha->vp_idx);
 810                 return NULL;
 811         }
 812
 813         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 814         pla->id = *id;
 815         list_add_tail(&pla->list, &vha->plogi_ack_list);
 816
 817         return pla;
 818 }
 819
 820 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 821     struct qlt_plogi_ack_t *pla)
 822 {
 823         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 824         port_id_t port_id;
 825         uint16_t loop_id;
 826         fc_port_t *fcport = pla->fcport;
 827
 828         BUG_ON(!pla->ref_count);
 829         pla->ref_count--;
 830
 831         if (pla->ref_count)
 832                 return;
 833
 834         ql_dbg(ql_dbg_disc, vha, 0x5089,
 835             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 836             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 837             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 838             iocb->u.isp24.port_id[0],
 839             le16_to_cpu(iocb->u.isp24.nport_handle),
 840             iocb->u.isp24.exchange_address, iocb->ox_id);
 841
 842         port_id.b.domain = iocb->u.isp24.port_id[2];
 843         port_id.b.area   = iocb->u.isp24.port_id[1];
 844         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 845         port_id.b.rsvd_1 = 0;
 846
 847         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 848
 849         fcport->loop_id = loop_id;
 850         fcport->d_id = port_id;
 851         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 852                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 853         else
 854                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 855
 856         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 857                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 858                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 859                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 860                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 861         }
 862
 863         list_del(&pla->list);
 864         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 865 }
 866
 867 void
 868 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 869     struct fc_port *sess, enum qlt_plogi_link_t link)
 870 {
 871         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 872         /* Inc ref_count first because link might already be pointing at pla */
 873         pla->ref_count++;
 874
 875         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 876                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 877                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 878                 sess, link, sess->port_name,
 879                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 880                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 881                 pla->ref_count, pla, link);
 882
 883         if (link == QLT_PLOGI_LINK_CONFLICT) {
 884                 switch (sess->disc_state) {
 885                 case DSC_DELETED:
 886                 case DSC_DELETE_PEND:
 887                         pla->ref_count--;
 888                         return;
 889                 default:
 890                         break;
 891                 }
 892         }
 893
 894         if (sess->plogi_link[link])
 895                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 896
 897         if (link == QLT_PLOGI_LINK_SAME_WWN)
 898                 pla->fcport = sess;
 899
 900         sess->plogi_link[link] = pla;
 901 }
 902
 903 typedef struct {
 904         /* These fields must be initialized by the caller */
 905         port_id_t id;
 906         /*
 907          * number of cmds dropped while we were waiting for
 908          * initiator to ack LOGO initialize to 1 if LOGO is
 909          * triggered by a command, otherwise, to 0
 910          */
 911         int cmd_count;
 912
 913         /* These fields are used by callee */
 914         struct list_head list;
 915 } qlt_port_logo_t;
 916
 917 static void
 918 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 919 {
 920         qlt_port_logo_t *tmp;
 921         int res;
 922
 923         mutex_lock(&vha->vha_tgt.tgt_mutex);
 924
 925         list_for_each_entry(tmp, &vha->logo_list, list) {
 926                 if (tmp->id.b24 == logo->id.b24) {
 927                         tmp->cmd_count += logo->cmd_count;
 928                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 929                         return;
 930                 }
 931         }
 932
 933         list_add_tail(&logo->list, &vha->logo_list);
 934
 935         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 936
 937         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 938
 939         mutex_lock(&vha->vha_tgt.tgt_mutex);
 940         list_del(&logo->list);
 941         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 942
 943         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 944             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 945             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 946             logo->cmd_count, res);
 947 }
 948
 949 void qlt_free_session_done(struct work_struct *work)
 950 {
 951         struct fc_port *sess = container_of(work, struct fc_port,
 952             free_work);
 953         struct qla_tgt *tgt = sess->tgt;
 954         struct scsi_qla_host *vha = sess->vha;
 955         struct qla_hw_data *ha = vha->hw;
 956         unsigned long flags;
 957         bool logout_started = false;
 958         scsi_qla_host_t *base_vha;
 959         struct qlt_plogi_ack_t *own =
 960                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 961
 962         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 963                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 964                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 965                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 966                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 967                 sess->logout_on_delete, sess->keep_nport_handle,
 968                 sess->send_els_logo);
 969
 970         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 971                 qla2x00_mark_device_lost(vha, sess, 0, 0);
 972
 973                 if (sess->send_els_logo) {
 974                         qlt_port_logo_t logo;
 975
 976                         logo.id = sess->d_id;
 977                         logo.cmd_count = 0;
 978                         if (!own)
 979                                 qlt_send_first_logo(vha, &logo);
 980                         sess->send_els_logo = 0;
 981                 }
 982
 983                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 984                         int rc;
 985
 986                         if (!own ||
 987                             (own &&
 988                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 989                                 rc = qla2x00_post_async_logout_work(vha, sess,
 990                                     NULL);
 991                                 if (rc != QLA_SUCCESS)
 992                                         ql_log(ql_log_warn, vha, 0xf085,
 993                                             "Schedule logo failed sess %p rc %d\n",
 994                                             sess, rc);
 995                                 else
 996                                         logout_started = true;
 997                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 998                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 999                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1000                                     NULL);
1001                                 if (rc != QLA_SUCCESS)
1002                                         ql_log(ql_log_warn, vha, 0xf085,
1003                                             "Schedule PRLO failed sess %p rc %d\n",
1004                                             sess, rc);
1005                                 else
1006                                         logout_started = true;
1007                         }
1008                 } /* if sess->logout_on_delete */
1009
1010                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1011                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1012                         sess->nvme_flag |= NVME_FLAG_DELETING;
1013                         qla_nvme_unregister_remote_port(sess);
1014                 }
1015         }
1016
1017         /*
1018          * Release the target session for FC Nexus from fabric module code.
1019          */
1020         if (sess->se_sess != NULL)
1021                 ha->tgt.tgt_ops->free_session(sess);
1022
1023         if (logout_started) {
1024                 bool traced = false;
1025
1026                 while (!READ_ONCE(sess->logout_completed)) {
1027                         if (!traced) {
1028                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1029                                         "%s: waiting for sess %p logout\n",
1030                                         __func__, sess);
1031                                 traced = true;
1032                         }
1033                         msleep(100);
1034                 }
1035
1036                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1037                     "%s: sess %p logout completed\n", __func__, sess);
1038         }
1039
1040         if (sess->logo_ack_needed) {
1041                 sess->logo_ack_needed = 0;
1042                 qla24xx_async_notify_ack(vha, sess,
1043                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1044         }
1045
1046         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1047         if (sess->se_sess) {
1048                 sess->se_sess = NULL;
1049                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1050                         tgt->sess_count--;
1051         }
1052
1053         sess->disc_state = DSC_DELETED;
1054         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1055         sess->deleted = QLA_SESS_DELETED;
1056
1057         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1058                 vha->fcport_count--;
1059                 sess->login_succ = 0;
1060         }
1061
1062         qla2x00_clear_loop_id(sess);
1063
1064         if (sess->conflict) {
1065                 sess->conflict->login_pause = 0;
1066                 sess->conflict = NULL;
1067                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1068                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1069         }
1070
1071         {
1072                 struct qlt_plogi_ack_t *con =
1073                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1074                 struct imm_ntfy_from_isp *iocb;
1075
1076                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1077
1078                 if (con) {
1079                         iocb = &con->iocb;
1080                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1081                                  "se_sess %p / sess %p port %8phC is gone,"
1082                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1083                                  sess->se_sess, sess, sess->port_name,
1084                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1085                                  own ? own->ref_count : -1,
1086                                  iocb->u.isp24.port_name, con->ref_count);
1087                         qlt_plogi_ack_unref(vha, con);
1088                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1089                 } else {
1090                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1091                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1092                             sess->se_sess, sess, sess->port_name,
1093                             own ? "releasing own PLOGI" :
1094                             "no own PLOGI pending",
1095                             own ? own->ref_count : -1);
1096                 }
1097
1098                 if (own) {
1099                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1100                         qlt_plogi_ack_unref(vha, own);
1101                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1102                 }
1103         }
1104
1105         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1106
1107         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1108             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1109                 sess, sess->port_name, vha->fcport_count);
1110
1111         if (tgt && (tgt->sess_count == 0))
1112                 wake_up_all(&tgt->waitQ);
1113
1114         if (vha->fcport_count == 0)
1115                 wake_up_all(&vha->fcport_waitQ);
1116
1117         base_vha = pci_get_drvdata(ha->pdev);
1118
1119         sess->free_pending = 0;
1120
1121         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1122                 return;
1123
1124         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1125                 switch (vha->host->active_mode) {
1126                 case MODE_INITIATOR:
1127                 case MODE_DUAL:
1128                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1129                         qla2xxx_wake_dpc(vha);
1130                         break;
1131                 case MODE_TARGET:
1132                 default:
1133                         /* no-op */
1134                         break;
1135                 }
1136         }
1137 }
1138
1139 /* ha->tgt.sess_lock supposed to be held on entry */
1140 void qlt_unreg_sess(struct fc_port *sess)
1141 {
1142         struct scsi_qla_host *vha = sess->vha;
1143         unsigned long flags;
1144
1145         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1146             "%s sess %p for deletion %8phC\n",
1147             __func__, sess, sess->port_name);
1148
1149         spin_lock_irqsave(&sess->vha->work_lock, flags);
1150         if (sess->free_pending) {
1151                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1152                 return;
1153         }
1154         sess->free_pending = 1;
1155         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1156
1157         if (sess->se_sess)
1158                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1159
1160         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1161         sess->disc_state = DSC_DELETE_PEND;
1162         sess->last_rscn_gen = sess->rscn_gen;
1163         sess->last_login_gen = sess->login_gen;
1164
1165         INIT_WORK(&sess->free_work, qlt_free_session_done);
1166         schedule_work(&sess->free_work);
1167 }
1168 EXPORT_SYMBOL(qlt_unreg_sess);
1169
1170 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1171 {
1172         struct qla_hw_data *ha = vha->hw;
1173         struct fc_port *sess = NULL;
1174         uint16_t loop_id;
1175         int res = 0;
1176         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1177         unsigned long flags;
1178
1179         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1180         if (loop_id == 0xFFFF) {
1181                 /* Global event */
1182                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1183                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1184                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1185                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1186         } else {
1187                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1188                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1189                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1190         }
1191
1192         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1193             "Using sess for qla_tgt_reset: %p\n", sess);
1194         if (!sess) {
1195                 res = -ESRCH;
1196                 return res;
1197         }
1198
1199         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1200             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1201             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1202             mcmd, loop_id);
1203
1204         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1205 }
1206
1207 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1208 {
1209         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1210                 sess->logout_on_delete = 0;
1211                 sess->logo_ack_needed = 0;
1212                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1213         }
1214 }
1215
1216 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1217 {
1218         struct qla_tgt *tgt = sess->tgt;
1219         unsigned long flags;
1220         u16 sec;
1221
1222         switch (sess->disc_state) {
1223         case DSC_DELETE_PEND:
1224                 return;
1225         case DSC_DELETED:
1226                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1227                         wake_up_all(&tgt->waitQ);
1228                 if (sess->vha->fcport_count == 0)
1229                         wake_up_all(&sess->vha->fcport_waitQ);
1230
1231                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1232                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1233                         return;
1234                 break;
1235         case DSC_UPD_FCPORT:
1236                 /*
1237                  * This port is not done reporting to upper layer.
1238                  * let it finish
1239                  */
1240                 sess->next_disc_state = DSC_DELETE_PEND;
1241                 sec = jiffies_to_msecs(jiffies -
1242                     sess->jiffies_at_registration)/1000;
1243                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1244                         sess->sec_since_registration = sec;
1245                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1246                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1247                             __func__, sess->port_name, sec);
1248                 }
1249                 return;
1250         default:
1251                 break;
1252         }
1253
1254         spin_lock_irqsave(&sess->vha->work_lock, flags);
1255         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1256                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1257                 return;
1258         }
1259         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1260         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1261
1262         sess->disc_state = DSC_DELETE_PEND;
1263
1264         qla24xx_chk_fcp_state(sess);
1265
1266         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1267             "Scheduling sess %p for deletion %8phC\n",
1268             sess, sess->port_name);
1269
1270         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1271         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1272 }
1273
1274 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1275 {
1276         struct fc_port *sess;
1277         scsi_qla_host_t *vha = tgt->vha;
1278
1279         list_for_each_entry(sess, &vha->vp_fcports, list) {
1280                 if (sess->se_sess)
1281                         qlt_schedule_sess_for_deletion(sess);
1282         }
1283
1284         /* At this point tgt could be already dead */
1285 }
1286
1287 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1288         uint16_t *loop_id)
1289 {
1290         struct qla_hw_data *ha = vha->hw;
1291         dma_addr_t gid_list_dma;
1292         struct gid_list_info *gid_list, *gid;
1293         int res, rc, i;
1294         uint16_t entries;
1295
1296         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1297             &gid_list_dma, GFP_KERNEL);
1298         if (!gid_list) {
1299                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1300                     "qla_target(%d): DMA Alloc failed of %u\n",
1301                     vha->vp_idx, qla2x00_gid_list_size(ha));
1302                 return -ENOMEM;
1303         }
1304
1305         /* Get list of logged in devices */
1306         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1307         if (rc != QLA_SUCCESS) {
1308                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1309                     "qla_target(%d): get_id_list() failed: %x\n",
1310                     vha->vp_idx, rc);
1311                 res = -EBUSY;
1312                 goto out_free_id_list;
1313         }
1314
1315         gid = gid_list;
1316         res = -ENOENT;
1317         for (i = 0; i < entries; i++) {
1318                 if (gid->al_pa == s_id.al_pa &&
1319                     gid->area == s_id.area &&
1320                     gid->domain == s_id.domain) {
1321                         *loop_id = le16_to_cpu(gid->loop_id);
1322                         res = 0;
1323                         break;
1324                 }
1325                 gid = (void *)gid + ha->gid_list_info_size;
1326         }
1327
1328 out_free_id_list:
1329         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1330             gid_list, gid_list_dma);
1331         return res;
1332 }
1333
1334 /*
1335  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1336  * Caller must put it.
1337  */
1338 static struct fc_port *qlt_create_sess(
1339         struct scsi_qla_host *vha,
1340         fc_port_t *fcport,
1341         bool local)
1342 {
1343         struct qla_hw_data *ha = vha->hw;
1344         struct fc_port *sess = fcport;
1345         unsigned long flags;
1346
1347         if (vha->vha_tgt.qla_tgt->tgt_stop)
1348                 return NULL;
1349
1350         if (fcport->se_sess) {
1351                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1352                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1353                             "%s: kref_get_unless_zero failed for %8phC\n",
1354                             __func__, sess->port_name);
1355                         return NULL;
1356                 }
1357                 return fcport;
1358         }
1359         sess->tgt = vha->vha_tgt.qla_tgt;
1360         sess->local = local;
1361
1362         /*
1363          * Under normal circumstances we want to logout from firmware when
1364          * session eventually ends and release corresponding nport handle.
1365          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1366          * code will adjust these flags as necessary.
1367          */
1368         sess->logout_on_delete = 1;
1369         sess->keep_nport_handle = 0;
1370         sess->logout_completed = 0;
1371
1372         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1373             &fcport->port_name[0], sess) < 0) {
1374                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1375                     "(%d) %8phC check_initiator_node_acl failed\n",
1376                     vha->vp_idx, fcport->port_name);
1377                 return NULL;
1378         } else {
1379                 kref_init(&fcport->sess_kref);
1380                 /*
1381                  * Take an extra reference to ->sess_kref here to handle
1382                  * fc_port access across ->tgt.sess_lock reaquire.
1383                  */
1384                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1385                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1386                             "%s: kref_get_unless_zero failed for %8phC\n",
1387                             __func__, sess->port_name);
1388                         return NULL;
1389                 }
1390
1391                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1392                 if (!IS_SW_RESV_ADDR(sess->d_id))
1393                         vha->vha_tgt.qla_tgt->sess_count++;
1394
1395                 qlt_do_generation_tick(vha, &sess->generation);
1396                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1397         }
1398
1399         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1400             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1401             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1402             vha->vha_tgt.qla_tgt->sess_count);
1403
1404         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1405             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1406             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1407             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1408             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1409             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1410
1411         return sess;
1412 }
1413
1414 /*
1415  * max_gen - specifies maximum session generation
1416  * at which this deletion requestion is still valid
1417  */
1418 void
1419 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1420 {
1421         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1422         struct fc_port *sess = fcport;
1423         unsigned long flags;
1424
1425         if (!vha->hw->tgt.tgt_ops)
1426                 return;
1427
1428         if (!tgt)
1429                 return;
1430
1431         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1432         if (tgt->tgt_stop) {
1433                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1434                 return;
1435         }
1436         if (!sess->se_sess) {
1437                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1438                 return;
1439         }
1440
1441         if (max_gen - sess->generation < 0) {
1442                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1443                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1444                     "Ignoring stale deletion request for se_sess %p / sess %p"
1445                     " for port %8phC, req_gen %d, sess_gen %d\n",
1446                     sess->se_sess, sess, sess->port_name, max_gen,
1447                     sess->generation);
1448                 return;
1449         }
1450
1451         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1452
1453         sess->local = 1;
1454         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1455         qlt_schedule_sess_for_deletion(sess);
1456 }
1457
1458 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1459 {
1460         struct qla_hw_data *ha = tgt->ha;
1461         unsigned long flags;
1462         int res;
1463         /*
1464          * We need to protect against race, when tgt is freed before or
1465          * inside wake_up()
1466          */
1467         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1468         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1469             "tgt %p, sess_count=%d\n",
1470             tgt, tgt->sess_count);
1471         res = (tgt->sess_count == 0);
1472         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1473
1474         return res;
1475 }
1476
1477 /* Called by tcm_qla2xxx configfs code */
1478 int qlt_stop_phase1(struct qla_tgt *tgt)
1479 {
1480         struct scsi_qla_host *vha = tgt->vha;
1481         struct qla_hw_data *ha = tgt->ha;
1482         unsigned long flags;
1483
1484         mutex_lock(&ha->optrom_mutex);
1485         mutex_lock(&qla_tgt_mutex);
1486
1487         if (tgt->tgt_stop || tgt->tgt_stopped) {
1488                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1489                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1490                 mutex_unlock(&qla_tgt_mutex);
1491                 mutex_unlock(&ha->optrom_mutex);
1492                 return -EPERM;
1493         }
1494
1495         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1496             vha->host_no, vha);
1497         /*
1498          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1499          * Lock is needed, because we still can get an incoming packet.
1500          */
1501         mutex_lock(&vha->vha_tgt.tgt_mutex);
1502         tgt->tgt_stop = 1;
1503         qlt_clear_tgt_db(tgt);
1504         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1505         mutex_unlock(&qla_tgt_mutex);
1506
1507         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1508             "Waiting for sess works (tgt %p)", tgt);
1509         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1510         while (!list_empty(&tgt->sess_works_list)) {
1511                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1512                 flush_scheduled_work();
1513                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1514         }
1515         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1516
1517         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1518             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1519
1520         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1521
1522         /* Big hammer */
1523         if (!ha->flags.host_shutting_down &&
1524             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1525                 qlt_disable_vha(vha);
1526
1527         /* Wait for sessions to clear out (just in case) */
1528         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1529         mutex_unlock(&ha->optrom_mutex);
1530
1531         return 0;
1532 }
1533 EXPORT_SYMBOL(qlt_stop_phase1);
1534
1535 /* Called by tcm_qla2xxx configfs code */
1536 void qlt_stop_phase2(struct qla_tgt *tgt)
1537 {
1538         scsi_qla_host_t *vha = tgt->vha;
1539
1540         if (tgt->tgt_stopped) {
1541                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1542                     "Already in tgt->tgt_stopped state\n");
1543                 dump_stack();
1544                 return;
1545         }
1546         if (!tgt->tgt_stop) {
1547                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1548                     "%s: phase1 stop is not completed\n", __func__);
1549                 dump_stack();
1550                 return;
1551         }
1552
1553         mutex_lock(&vha->vha_tgt.tgt_mutex);
1554         tgt->tgt_stop = 0;
1555         tgt->tgt_stopped = 1;
1556         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1557
1558         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1559             tgt);
1560
1561         switch (vha->qlini_mode) {
1562         case QLA2XXX_INI_MODE_EXCLUSIVE:
1563                 vha->flags.online = 1;
1564                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1565                 break;
1566         default:
1567                 break;
1568         }
1569 }
1570 EXPORT_SYMBOL(qlt_stop_phase2);
1571
1572 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1573 static void qlt_release(struct qla_tgt *tgt)
1574 {
1575         scsi_qla_host_t *vha = tgt->vha;
1576         void *node;
1577         u64 key = 0;
1578         u16 i;
1579         struct qla_qpair_hint *h;
1580         struct qla_hw_data *ha = vha->hw;
1581
1582         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1583                 qlt_stop_phase1(tgt);
1584
1585         if (!tgt->tgt_stopped)
1586                 qlt_stop_phase2(tgt);
1587
1588         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1589                 unsigned long flags;
1590
1591                 h = &tgt->qphints[i];
1592                 if (h->qpair) {
1593                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1594                         list_del(&h->hint_elem);
1595                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1596                         h->qpair = NULL;
1597                 }
1598         }
1599         kfree(tgt->qphints);
1600         mutex_lock(&qla_tgt_mutex);
1601         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1602         mutex_unlock(&qla_tgt_mutex);
1603
1604         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1605                 btree_remove64(&tgt->lun_qpair_map, key);
1606
1607         btree_destroy64(&tgt->lun_qpair_map);
1608
1609         if (vha->vp_idx)
1610                 if (ha->tgt.tgt_ops &&
1611                     ha->tgt.tgt_ops->remove_target &&
1612                     vha->vha_tgt.target_lport_ptr)
1613                         ha->tgt.tgt_ops->remove_target(vha);
1614
1615         vha->vha_tgt.qla_tgt = NULL;
1616
1617         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1618             "Release of tgt %p finished\n", tgt);
1619
1620         kfree(tgt);
1621 }
1622
1623 /* ha->hardware_lock supposed to be held on entry */
1624 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1625         const void *param, unsigned int param_size)
1626 {
1627         struct qla_tgt_sess_work_param *prm;
1628         unsigned long flags;
1629
1630         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1631         if (!prm) {
1632                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1633                     "qla_target(%d): Unable to create session "
1634                     "work, command will be refused", 0);
1635                 return -ENOMEM;
1636         }
1637
1638         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1639             "Scheduling work (type %d, prm %p)"
1640             " to find session for param %p (size %d, tgt %p)\n",
1641             type, prm, param, param_size, tgt);
1642
1643         prm->type = type;
1644         memcpy(&prm->tm_iocb, param, param_size);
1645
1646         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1647         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1648         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1649
1650         schedule_work(&tgt->sess_work);
1651
1652         return 0;
1653 }
1654
1655 /*
1656  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1657  */
1658 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1659         struct imm_ntfy_from_isp *ntfy,
1660         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1661         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1662 {
1663         struct scsi_qla_host *vha = qpair->vha;
1664         struct qla_hw_data *ha = vha->hw;
1665         request_t *pkt;
1666         struct nack_to_isp *nack;
1667
1668         if (!ha->flags.fw_started)
1669                 return;
1670
1671         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1672
1673         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1674         if (!pkt) {
1675                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1676                     "qla_target(%d): %s failed: unable to allocate "
1677                     "request packet\n", vha->vp_idx, __func__);
1678                 return;
1679         }
1680
1681         if (vha->vha_tgt.qla_tgt != NULL)
1682                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1683
1684         pkt->entry_type = NOTIFY_ACK_TYPE;
1685         pkt->entry_count = 1;
1686
1687         nack = (struct nack_to_isp *)pkt;
1688         nack->ox_id = ntfy->ox_id;
1689
1690         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1691         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1692         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1693                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1694                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1695         }
1696         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1697         nack->u.isp24.status = ntfy->u.isp24.status;
1698         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1699         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1700         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1701         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1702         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1703         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1704         nack->u.isp24.srr_reject_code = srr_reject_code;
1705         nack->u.isp24.srr_reject_code_expl = srr_explan;
1706         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1707
1708         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1709             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1710             vha->vp_idx, nack->u.isp24.status);
1711
1712         /* Memory Barrier */
1713         wmb();
1714         qla2x00_start_iocbs(vha, qpair->req);
1715 }
1716
1717 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1718 {
1719         struct scsi_qla_host *vha = mcmd->vha;
1720         struct qla_hw_data *ha = vha->hw;
1721         struct abts_resp_to_24xx *resp;
1722         uint32_t f_ctl, h;
1723         uint8_t *p;
1724         int rc;
1725         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1726         struct qla_qpair *qpair = mcmd->qpair;
1727
1728         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1729             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1730             ha, mcmd->fc_tm_rsp);
1731
1732         rc = qlt_check_reserve_free_req(qpair, 1);
1733         if (rc) {
1734                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1735                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1736                     vha->vp_idx, __func__);
1737                 return -EAGAIN;
1738         }
1739
1740         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1741         memset(resp, 0, sizeof(*resp));
1742
1743         h = qlt_make_handle(qpair);
1744         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1745                 /*
1746                  * CTIO type 7 from the firmware doesn't provide a way to
1747                  * know the initiator's LOOP ID, hence we can't find
1748                  * the session and, so, the command.
1749                  */
1750                 return -EAGAIN;
1751         } else {
1752                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1753         }
1754
1755         resp->handle = MAKE_HANDLE(qpair->req->id, h);
1756         resp->entry_type = ABTS_RESP_24XX;
1757         resp->entry_count = 1;
1758         resp->nport_handle = abts->nport_handle;
1759         resp->vp_index = vha->vp_idx;
1760         resp->sof_type = abts->sof_type;
1761         resp->exchange_address = abts->exchange_address;
1762         resp->fcp_hdr_le = abts->fcp_hdr_le;
1763         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1764             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1765             F_CTL_SEQ_INITIATIVE);
1766         p = (uint8_t *)&f_ctl;
1767         resp->fcp_hdr_le.f_ctl[0] = *p++;
1768         resp->fcp_hdr_le.f_ctl[1] = *p++;
1769         resp->fcp_hdr_le.f_ctl[2] = *p;
1770
1771         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1772         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1773
1774         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1775         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1776                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1777                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1778                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1779                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1780                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1781                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1782         } else {
1783                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1784                 resp->payload.ba_rjt.reason_code =
1785                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1786                 /* Other bytes are zero */
1787         }
1788
1789         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1790
1791         /* Memory Barrier */
1792         wmb();
1793         if (qpair->reqq_start_iocbs)
1794                 qpair->reqq_start_iocbs(qpair);
1795         else
1796                 qla2x00_start_iocbs(vha, qpair->req);
1797
1798         return rc;
1799 }
1800
1801 /*
1802  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1803  */
1804 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1805         struct abts_recv_from_24xx *abts, uint32_t status,
1806         bool ids_reversed)
1807 {
1808         struct scsi_qla_host *vha = qpair->vha;
1809         struct qla_hw_data *ha = vha->hw;
1810         struct abts_resp_to_24xx *resp;
1811         uint32_t f_ctl;
1812         uint8_t *p;
1813
1814         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1815             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1816             ha, abts, status);
1817
1818         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1819             NULL);
1820         if (!resp) {
1821                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1822                     "qla_target(%d): %s failed: unable to allocate "
1823                     "request packet", vha->vp_idx, __func__);
1824                 return;
1825         }
1826
1827         resp->entry_type = ABTS_RESP_24XX;
1828         resp->handle = QLA_TGT_SKIP_HANDLE;
1829         resp->entry_count = 1;
1830         resp->nport_handle = abts->nport_handle;
1831         resp->vp_index = vha->vp_idx;
1832         resp->sof_type = abts->sof_type;
1833         resp->exchange_address = abts->exchange_address;
1834         resp->fcp_hdr_le = abts->fcp_hdr_le;
1835         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1836             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1837             F_CTL_SEQ_INITIATIVE);
1838         p = (uint8_t *)&f_ctl;
1839         resp->fcp_hdr_le.f_ctl[0] = *p++;
1840         resp->fcp_hdr_le.f_ctl[1] = *p++;
1841         resp->fcp_hdr_le.f_ctl[2] = *p;
1842         if (ids_reversed) {
1843                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1844                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1845         } else {
1846                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1847                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1848         }
1849         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1850         if (status == FCP_TMF_CMPL) {
1851                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1852                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1853                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1854                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1855                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1856                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1857         } else {
1858                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1859                 resp->payload.ba_rjt.reason_code =
1860                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1861                 /* Other bytes are zero */
1862         }
1863
1864         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1865
1866         /* Memory Barrier */
1867         wmb();
1868         if (qpair->reqq_start_iocbs)
1869                 qpair->reqq_start_iocbs(qpair);
1870         else
1871                 qla2x00_start_iocbs(vha, qpair->req);
1872 }
1873
1874 /*
1875  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1876  */
1877 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1878     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1879 {
1880         struct ctio7_to_24xx *ctio;
1881         u16 tmp;
1882         struct abts_recv_from_24xx *entry;
1883
1884         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1885         if (ctio == NULL) {
1886                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1887                     "qla_target(%d): %s failed: unable to allocate "
1888                     "request packet\n", vha->vp_idx, __func__);
1889                 return;
1890         }
1891
1892         if (mcmd)
1893                 /* abts from remote port */
1894                 entry = &mcmd->orig_iocb.abts;
1895         else
1896                 /* abts from this driver.  */
1897                 entry = (struct abts_recv_from_24xx *)pkt;
1898
1899         /*
1900          * We've got on entrance firmware's response on by us generated
1901          * ABTS response. So, in it ID fields are reversed.
1902          */
1903
1904         ctio->entry_type = CTIO_TYPE7;
1905         ctio->entry_count = 1;
1906         ctio->nport_handle = entry->nport_handle;
1907         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1908         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1909         ctio->vp_index = vha->vp_idx;
1910         ctio->exchange_addr = entry->exchange_addr_to_abort;
1911         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1912
1913         if (mcmd) {
1914                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1915
1916                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1917                         tmp |= (mcmd->abort_io_attr << 9);
1918                 else if (qpair->retry_term_cnt & 1)
1919                         tmp |= (0x4 << 9);
1920         } else {
1921                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1922
1923                 if (qpair->retry_term_cnt & 1)
1924                         tmp |= (0x4 << 9);
1925         }
1926         ctio->u.status1.flags = cpu_to_le16(tmp);
1927         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1928
1929         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1930             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1931             le16_to_cpu(ctio->u.status1.flags),
1932             le16_to_cpu(ctio->u.status1.ox_id),
1933             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1934
1935         /* Memory Barrier */
1936         wmb();
1937         if (qpair->reqq_start_iocbs)
1938                 qpair->reqq_start_iocbs(qpair);
1939         else
1940                 qla2x00_start_iocbs(vha, qpair->req);
1941
1942         if (mcmd)
1943                 qlt_build_abts_resp_iocb(mcmd);
1944         else
1945                 qlt_24xx_send_abts_resp(qpair,
1946                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1947
1948 }
1949
1950 /* drop cmds for the given lun
1951  * XXX only looks for cmds on the port through which lun reset was recieved
1952  * XXX does not go through the list of other port (which may have cmds
1953  *     for the same lun)
1954  */
1955 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1956 {
1957         struct qla_tgt_sess_op *op;
1958         struct qla_tgt_cmd *cmd;
1959         uint32_t key;
1960         unsigned long flags;
1961
1962         key = sid_to_key(s_id);
1963         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1964         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1965                 uint32_t op_key;
1966                 u64 op_lun;
1967
1968                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1969                 op_lun = scsilun_to_int(
1970                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1971                 if (op_key == key && op_lun == lun)
1972                         op->aborted = true;
1973         }
1974
1975         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1976                 uint32_t op_key;
1977                 u64 op_lun;
1978
1979                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1980                 op_lun = scsilun_to_int(
1981                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1982                 if (op_key == key && op_lun == lun)
1983                         op->aborted = true;
1984         }
1985
1986         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1987                 uint32_t cmd_key;
1988                 u64 cmd_lun;
1989
1990                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1991                 cmd_lun = scsilun_to_int(
1992                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1993                 if (cmd_key == key && cmd_lun == lun)
1994                         cmd->aborted = 1;
1995         }
1996         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1997 }
1998
1999 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2000     uint64_t unpacked_lun)
2001 {
2002         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2003         struct qla_qpair_hint *h = NULL;
2004
2005         if (vha->flags.qpairs_available) {
2006                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2007                 if (!h)
2008                         h = &tgt->qphints[0];
2009         } else {
2010                 h = &tgt->qphints[0];
2011         }
2012
2013         return h;
2014 }
2015
2016 static void qlt_do_tmr_work(struct work_struct *work)
2017 {
2018         struct qla_tgt_mgmt_cmd *mcmd =
2019                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2020         struct qla_hw_data *ha = mcmd->vha->hw;
2021         int rc = EIO;
2022         uint32_t tag;
2023         unsigned long flags;
2024
2025         switch (mcmd->tmr_func) {
2026         case QLA_TGT_ABTS:
2027                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
2028                 break;
2029         default:
2030                 tag = 0;
2031                 break;
2032         }
2033
2034         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2035             mcmd->tmr_func, tag);
2036
2037         if (rc != 0) {
2038                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2039                 switch (mcmd->tmr_func) {
2040                 case QLA_TGT_ABTS:
2041                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2042                         qlt_build_abts_resp_iocb(mcmd);
2043                         break;
2044                 case QLA_TGT_LUN_RESET:
2045                 case QLA_TGT_CLEAR_TS:
2046                 case QLA_TGT_ABORT_TS:
2047                 case QLA_TGT_CLEAR_ACA:
2048                 case QLA_TGT_TARGET_RESET:
2049                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2050                             qla_sam_status);
2051                         break;
2052
2053                 case QLA_TGT_ABORT_ALL:
2054                 case QLA_TGT_NEXUS_LOSS_SESS:
2055                 case QLA_TGT_NEXUS_LOSS:
2056                         qlt_send_notify_ack(mcmd->qpair,
2057                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2058                         break;
2059                 }
2060                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2061
2062                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2063                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2064                     mcmd->vha->vp_idx, rc);
2065                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2066         }
2067 }
2068
2069 /* ha->hardware_lock supposed to be held on entry */
2070 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2071         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2072 {
2073         struct qla_hw_data *ha = vha->hw;
2074         struct qla_tgt_mgmt_cmd *mcmd;
2075         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2076
2077         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2078             "qla_target(%d): task abort (tag=%d)\n",
2079             vha->vp_idx, abts->exchange_addr_to_abort);
2080
2081         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2082         if (mcmd == NULL) {
2083                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2084                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2085                     vha->vp_idx, __func__);
2086                 return -ENOMEM;
2087         }
2088         memset(mcmd, 0, sizeof(*mcmd));
2089         mcmd->cmd_type = TYPE_TGT_TMCMD;
2090         mcmd->sess = sess;
2091         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2092         mcmd->reset_count = ha->base_qpair->chip_reset;
2093         mcmd->tmr_func = QLA_TGT_ABTS;
2094         mcmd->qpair = h->qpair;
2095         mcmd->vha = vha;
2096
2097         /*
2098          * LUN is looked up by target-core internally based on the passed
2099          * abts->exchange_addr_to_abort tag.
2100          */
2101         mcmd->se_cmd.cpuid = h->cpuid;
2102
2103         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2104                 struct qla_tgt_cmd *abort_cmd;
2105
2106                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2107                     abts->exchange_addr_to_abort);
2108                 if (abort_cmd && abort_cmd->qpair) {
2109                         mcmd->qpair = abort_cmd->qpair;
2110                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2111                         mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2112                         mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2113                 }
2114         }
2115
2116         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2117         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2118
2119         return 0;
2120 }
2121
2122 /*
2123  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2124  */
2125 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2126         struct abts_recv_from_24xx *abts)
2127 {
2128         struct qla_hw_data *ha = vha->hw;
2129         struct fc_port *sess;
2130         uint32_t tag = abts->exchange_addr_to_abort;
2131         be_id_t s_id;
2132         int rc;
2133         unsigned long flags;
2134
2135         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2136                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2137                     "qla_target(%d): ABTS: Abort Sequence not "
2138                     "supported\n", vha->vp_idx);
2139                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2140                     false);
2141                 return;
2142         }
2143
2144         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2145                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2146                     "qla_target(%d): ABTS: Unknown Exchange "
2147                     "Address received\n", vha->vp_idx);
2148                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2149                     false);
2150                 return;
2151         }
2152
2153         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2154             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2155             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2156             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2157             le32_to_cpu(abts->fcp_hdr_le.parameter));
2158
2159         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2160
2161         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2162         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2163         if (!sess) {
2164                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2165                     "qla_target(%d): task abort for non-existent session\n",
2166                     vha->vp_idx);
2167                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2168
2169                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2170                             false);
2171                 return;
2172         }
2173         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2174
2175
2176         if (sess->deleted) {
2177                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2178                     false);
2179                 return;
2180         }
2181
2182         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2183         if (rc != 0) {
2184                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2185                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2186                     vha->vp_idx, rc);
2187                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2188                     false);
2189                 return;
2190         }
2191 }
2192
2193 /*
2194  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2195  */
2196 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2197         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2198 {
2199         struct scsi_qla_host *ha = mcmd->vha;
2200         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2201         struct ctio7_to_24xx *ctio;
2202         uint16_t temp;
2203
2204         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2205             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2206             ha, atio, resp_code);
2207
2208
2209         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2210         if (ctio == NULL) {
2211                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2212                     "qla_target(%d): %s failed: unable to allocate "
2213                     "request packet\n", ha->vp_idx, __func__);
2214                 return;
2215         }
2216
2217         ctio->entry_type = CTIO_TYPE7;
2218         ctio->entry_count = 1;
2219         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2220         ctio->nport_handle = mcmd->sess->loop_id;
2221         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2222         ctio->vp_index = ha->vp_idx;
2223         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2224         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2225         temp = (atio->u.isp24.attr << 9)|
2226                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2227         ctio->u.status1.flags = cpu_to_le16(temp);
2228         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2229         ctio->u.status1.ox_id = cpu_to_le16(temp);
2230         ctio->u.status1.scsi_status =
2231             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2232         ctio->u.status1.response_len = cpu_to_le16(8);
2233         ctio->u.status1.sense_data[0] = resp_code;
2234
2235         /* Memory Barrier */
2236         wmb();
2237         if (qpair->reqq_start_iocbs)
2238                 qpair->reqq_start_iocbs(qpair);
2239         else
2240                 qla2x00_start_iocbs(ha, qpair->req);
2241 }
2242
2243 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2244 {
2245         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2246 }
2247 EXPORT_SYMBOL(qlt_free_mcmd);
2248
2249 /*
2250  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2251  * reacquire
2252  */
2253 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2254     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2255 {
2256         struct atio_from_isp *atio = &cmd->atio;
2257         struct ctio7_to_24xx *ctio;
2258         uint16_t temp;
2259         struct scsi_qla_host *vha = cmd->vha;
2260
2261         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2262             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2263             "sense_key=%02x, asc=%02x, ascq=%02x",
2264             vha, atio, scsi_status, sense_key, asc, ascq);
2265
2266         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2267         if (!ctio) {
2268                 ql_dbg(ql_dbg_async, vha, 0x3067,
2269                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2270                     vha->host_no, __func__);
2271                 goto out;
2272         }
2273
2274         ctio->entry_type = CTIO_TYPE7;
2275         ctio->entry_count = 1;
2276         ctio->handle = QLA_TGT_SKIP_HANDLE;
2277         ctio->nport_handle = cmd->sess->loop_id;
2278         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2279         ctio->vp_index = vha->vp_idx;
2280         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2281         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2282         temp = (atio->u.isp24.attr << 9) |
2283             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2284         ctio->u.status1.flags = cpu_to_le16(temp);
2285         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2286         ctio->u.status1.ox_id = cpu_to_le16(temp);
2287         ctio->u.status1.scsi_status =
2288             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2289         ctio->u.status1.response_len = cpu_to_le16(18);
2290         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2291
2292         if (ctio->u.status1.residual != 0)
2293                 ctio->u.status1.scsi_status |=
2294                     cpu_to_le16(SS_RESIDUAL_UNDER);
2295
2296         /* Fixed format sense data. */
2297         ctio->u.status1.sense_data[0] = 0x70;
2298         ctio->u.status1.sense_data[2] = sense_key;
2299         /* Additional sense length */
2300         ctio->u.status1.sense_data[7] = 0xa;
2301         /* ASC and ASCQ */
2302         ctio->u.status1.sense_data[12] = asc;
2303         ctio->u.status1.sense_data[13] = ascq;
2304
2305         /* Memory Barrier */
2306         wmb();
2307
2308         if (qpair->reqq_start_iocbs)
2309                 qpair->reqq_start_iocbs(qpair);
2310         else
2311                 qla2x00_start_iocbs(vha, qpair->req);
2312
2313 out:
2314         return;
2315 }
2316
2317 /* callback from target fabric module code */
2318 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2319 {
2320         struct scsi_qla_host *vha = mcmd->sess->vha;
2321         struct qla_hw_data *ha = vha->hw;
2322         unsigned long flags;
2323         struct qla_qpair *qpair = mcmd->qpair;
2324         bool free_mcmd = true;
2325
2326         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2327             "TM response mcmd (%p) status %#x state %#x",
2328             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2329
2330         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2331
2332         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2333                 /*
2334                  * Either the port is not online or this request was from
2335                  * previous life, just abort the processing.
2336                  */
2337                 ql_dbg(ql_dbg_async, vha, 0xe100,
2338                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2339                         vha->flags.online, qla2x00_reset_active(vha),
2340                         mcmd->reset_count, qpair->chip_reset);
2341                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2342                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2343                 return;
2344         }
2345
2346         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2347                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2348                 case ELS_LOGO:
2349                 case ELS_PRLO:
2350                 case ELS_TPRLO:
2351                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2352                             "TM response logo %8phC status %#x state %#x",
2353                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2354                             mcmd->flags);
2355                         qlt_schedule_sess_for_deletion(mcmd->sess);
2356                         break;
2357                 default:
2358                         qlt_send_notify_ack(vha->hw->base_qpair,
2359                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2360                         break;
2361                 }
2362         } else {
2363                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2364                         qlt_build_abts_resp_iocb(mcmd);
2365                         free_mcmd = false;
2366                 } else
2367                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2368                             mcmd->fc_tm_rsp);
2369         }
2370         /*
2371          * Make the callback for ->free_mcmd() to queue_work() and invoke
2372          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2373          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2374          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2375          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2376          * qlt_xmit_tm_rsp() returns here..
2377          */
2378         if (free_mcmd)
2379                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2380
2381         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2382 }
2383 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2384
2385 /* No locks */
2386 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2387 {
2388         struct qla_tgt_cmd *cmd = prm->cmd;
2389
2390         BUG_ON(cmd->sg_cnt == 0);
2391
2392         prm->sg = (struct scatterlist *)cmd->sg;
2393         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2394             cmd->sg_cnt, cmd->dma_data_direction);
2395         if (unlikely(prm->seg_cnt == 0))
2396                 goto out_err;
2397
2398         prm->cmd->sg_mapped = 1;
2399
2400         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2401                 /*
2402                  * If greater than four sg entries then we need to allocate
2403                  * the continuation entries
2404                  */
2405                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2406                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2407                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2408                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2409         } else {
2410                 /* DIF */
2411                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2412                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2413                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2414                         prm->tot_dsds = prm->seg_cnt;
2415                 } else
2416                         prm->tot_dsds = prm->seg_cnt;
2417
2418                 if (cmd->prot_sg_cnt) {
2419                         prm->prot_sg      = cmd->prot_sg;
2420                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2421                                 cmd->prot_sg, cmd->prot_sg_cnt,
2422                                 cmd->dma_data_direction);
2423                         if (unlikely(prm->prot_seg_cnt == 0))
2424                                 goto out_err;
2425
2426                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2427                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2428                                 /* Dif Bundling not support here */
2429                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2430                                                                 cmd->blk_sz);
2431                                 prm->tot_dsds += prm->prot_seg_cnt;
2432                         } else
2433                                 prm->tot_dsds += prm->prot_seg_cnt;
2434                 }
2435         }
2436
2437         return 0;
2438
2439 out_err:
2440         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2441             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2442             0, prm->cmd->sg_cnt);
2443         return -1;
2444 }
2445
2446 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2447 {
2448         struct qla_hw_data *ha;
2449         struct qla_qpair *qpair;
2450
2451         if (!cmd->sg_mapped)
2452                 return;
2453
2454         qpair = cmd->qpair;
2455
2456         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2457             cmd->dma_data_direction);
2458         cmd->sg_mapped = 0;
2459
2460         if (cmd->prot_sg_cnt)
2461                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2462                         cmd->dma_data_direction);
2463
2464         if (!cmd->ctx)
2465                 return;
2466         ha = vha->hw;
2467         if (cmd->ctx_dsd_alloced)
2468                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2469
2470         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2471 }
2472
2473 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2474         uint32_t req_cnt)
2475 {
2476         uint32_t cnt;
2477         struct req_que *req = qpair->req;
2478
2479         if (req->cnt < (req_cnt + 2)) {
2480                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2481                     RD_REG_DWORD_RELAXED(req->req_q_out));
2482
2483                 if  (req->ring_index < cnt)
2484                         req->cnt = cnt - req->ring_index;
2485                 else
2486                         req->cnt = req->length - (req->ring_index - cnt);
2487
2488                 if (unlikely(req->cnt < (req_cnt + 2)))
2489                         return -EAGAIN;
2490         }
2491
2492         req->cnt -= req_cnt;
2493
2494         return 0;
2495 }
2496
2497 /*
2498  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2499  */
2500 static inline void *qlt_get_req_pkt(struct req_que *req)
2501 {
2502         /* Adjust ring index. */
2503         req->ring_index++;
2504         if (req->ring_index == req->length) {
2505                 req->ring_index = 0;
2506                 req->ring_ptr = req->ring;
2507         } else {
2508                 req->ring_ptr++;
2509         }
2510         return (cont_entry_t *)req->ring_ptr;
2511 }
2512
2513 /* ha->hardware_lock supposed to be held on entry */
2514 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2515 {
2516         uint32_t h;
2517         int index;
2518         uint8_t found = 0;
2519         struct req_que *req = qpair->req;
2520
2521         h = req->current_outstanding_cmd;
2522
2523         for (index = 1; index < req->num_outstanding_cmds; index++) {
2524                 h++;
2525                 if (h == req->num_outstanding_cmds)
2526                         h = 1;
2527
2528                 if (h == QLA_TGT_SKIP_HANDLE)
2529                         continue;
2530
2531                 if (!req->outstanding_cmds[h]) {
2532                         found = 1;
2533                         break;
2534                 }
2535         }
2536
2537         if (found) {
2538                 req->current_outstanding_cmd = h;
2539         } else {
2540                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2541                     "qla_target(%d): Ran out of empty cmd slots\n",
2542                     qpair->vha->vp_idx);
2543                 h = QLA_TGT_NULL_HANDLE;
2544         }
2545
2546         return h;
2547 }
2548
2549 /* ha->hardware_lock supposed to be held on entry */
2550 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2551         struct qla_tgt_prm *prm)
2552 {
2553         uint32_t h;
2554         struct ctio7_to_24xx *pkt;
2555         struct atio_from_isp *atio = &prm->cmd->atio;
2556         uint16_t temp;
2557
2558         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2559         prm->pkt = pkt;
2560         memset(pkt, 0, sizeof(*pkt));
2561
2562         pkt->entry_type = CTIO_TYPE7;
2563         pkt->entry_count = (uint8_t)prm->req_cnt;
2564         pkt->vp_index = prm->cmd->vp_idx;
2565
2566         h = qlt_make_handle(qpair);
2567         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2568                 /*
2569                  * CTIO type 7 from the firmware doesn't provide a way to
2570                  * know the initiator's LOOP ID, hence we can't find
2571                  * the session and, so, the command.
2572                  */
2573                 return -EAGAIN;
2574         } else
2575                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2576
2577         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2578         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2579         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2580         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2581         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2582         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2583         temp = atio->u.isp24.attr << 9;
2584         pkt->u.status0.flags |= cpu_to_le16(temp);
2585         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2586         pkt->u.status0.ox_id = cpu_to_le16(temp);
2587         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2588
2589         return 0;
2590 }
2591
2592 /*
2593  * ha->hardware_lock supposed to be held on entry. We have already made sure
2594  * that there is sufficient amount of request entries to not drop it.
2595  */
2596 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2597 {
2598         int cnt;
2599         struct dsd64 *cur_dsd;
2600
2601         /* Build continuation packets */
2602         while (prm->seg_cnt > 0) {
2603                 cont_a64_entry_t *cont_pkt64 =
2604                         (cont_a64_entry_t *)qlt_get_req_pkt(
2605                            prm->cmd->qpair->req);
2606
2607                 /*
2608                  * Make sure that from cont_pkt64 none of
2609                  * 64-bit specific fields used for 32-bit
2610                  * addressing. Cast to (cont_entry_t *) for
2611                  * that.
2612                  */
2613
2614                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2615
2616                 cont_pkt64->entry_count = 1;
2617                 cont_pkt64->sys_define = 0;
2618
2619                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2620                 cur_dsd = cont_pkt64->dsd;
2621
2622                 /* Load continuation entry data segments */
2623                 for (cnt = 0;
2624                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2625                     cnt++, prm->seg_cnt--) {
2626                         append_dsd64(&cur_dsd, prm->sg);
2627                         prm->sg = sg_next(prm->sg);
2628                 }
2629         }
2630 }
2631
2632 /*
2633  * ha->hardware_lock supposed to be held on entry. We have already made sure
2634  * that there is sufficient amount of request entries to not drop it.
2635  */
2636 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2637 {
2638         int cnt;
2639         struct dsd64 *cur_dsd;
2640         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2641
2642         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2643
2644         /* Setup packet address segment pointer */
2645         cur_dsd = &pkt24->u.status0.dsd;
2646
2647         /* Set total data segment count */
2648         if (prm->seg_cnt)
2649                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2650
2651         if (prm->seg_cnt == 0) {
2652                 /* No data transfer */
2653                 cur_dsd->address = 0;
2654                 cur_dsd->length = 0;
2655                 return;
2656         }
2657
2658         /* If scatter gather */
2659
2660         /* Load command entry data segments */
2661         for (cnt = 0;
2662             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2663             cnt++, prm->seg_cnt--) {
2664                 append_dsd64(&cur_dsd, prm->sg);
2665                 prm->sg = sg_next(prm->sg);
2666         }
2667
2668         qlt_load_cont_data_segments(prm);
2669 }
2670
2671 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2672 {
2673         return cmd->bufflen > 0;
2674 }
2675
2676 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2677 {
2678         struct qla_tgt_cmd *cmd;
2679         struct scsi_qla_host *vha;
2680
2681         /* asc 0x10=dif error */
2682         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2683                 cmd = prm->cmd;
2684                 vha = cmd->vha;
2685                 /* ASCQ */
2686                 switch (prm->sense_buffer[13]) {
2687                 case 1:
2688                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2689                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2690                             "se_cmd=%p tag[%x]",
2691                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2692                             cmd->atio.u.isp24.exchange_addr);
2693                         break;
2694                 case 2:
2695                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2696                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2697                             "se_cmd=%p tag[%x]",
2698                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2699                             cmd->atio.u.isp24.exchange_addr);
2700                         break;
2701                 case 3:
2702                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2703                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2704                             "se_cmd=%p tag[%x]",
2705                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2706                             cmd->atio.u.isp24.exchange_addr);
2707                         break;
2708                 default:
2709                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2710                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2711                             "se_cmd=%p tag[%x]",
2712                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2713                             cmd->atio.u.isp24.exchange_addr);
2714                         break;
2715                 }
2716                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2717         }
2718 }
2719
2720 /*
2721  * Called without ha->hardware_lock held
2722  */
2723 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2724         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2725         uint32_t *full_req_cnt)
2726 {
2727         struct se_cmd *se_cmd = &cmd->se_cmd;
2728         struct qla_qpair *qpair = cmd->qpair;
2729
2730         prm->cmd = cmd;
2731         prm->tgt = cmd->tgt;
2732         prm->pkt = NULL;
2733         prm->rq_result = scsi_status;
2734         prm->sense_buffer = &cmd->sense_buffer[0];
2735         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2736         prm->sg = NULL;
2737         prm->seg_cnt = -1;
2738         prm->req_cnt = 1;
2739         prm->residual = 0;
2740         prm->add_status_pkt = 0;
2741         prm->prot_sg = NULL;
2742         prm->prot_seg_cnt = 0;
2743         prm->tot_dsds = 0;
2744
2745         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2746                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2747                         return -EAGAIN;
2748         }
2749
2750         *full_req_cnt = prm->req_cnt;
2751
2752         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2753                 prm->residual = se_cmd->residual_count;
2754                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2755                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2756                        prm->residual, se_cmd->tag,
2757                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2758                        cmd->bufflen, prm->rq_result);
2759                 prm->rq_result |= SS_RESIDUAL_UNDER;
2760         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2761                 prm->residual = se_cmd->residual_count;
2762                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2763                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2764                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2765                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2766                 prm->rq_result |= SS_RESIDUAL_OVER;
2767         }
2768
2769         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2770                 /*
2771                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2772                  * ignored in *xmit_response() below
2773                  */
2774                 if (qlt_has_data(cmd)) {
2775                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2776                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2777                             (prm->rq_result != 0))) {
2778                                 prm->add_status_pkt = 1;
2779                                 (*full_req_cnt)++;
2780                         }
2781                 }
2782         }
2783
2784         return 0;
2785 }
2786
2787 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2788     int sending_sense)
2789 {
2790         if (cmd->qpair->enable_class_2)
2791                 return 0;
2792
2793         if (sending_sense)
2794                 return cmd->conf_compl_supported;
2795         else
2796                 return cmd->qpair->enable_explicit_conf &&
2797                     cmd->conf_compl_supported;
2798 }
2799
2800 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2801         struct qla_tgt_prm *prm)
2802 {
2803         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2804             (uint32_t)sizeof(ctio->u.status1.sense_data));
2805         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2806         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2807                 ctio->u.status0.flags |= cpu_to_le16(
2808                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2809                     CTIO7_FLAGS_CONFORM_REQ);
2810         }
2811         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2812         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2813         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2814                 int i;
2815
2816                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2817                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2818                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2819                                     "Skipping EXPLICIT_CONFORM and "
2820                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2821                                     "non GOOD status\n");
2822                                 goto skip_explict_conf;
2823                         }
2824                         ctio->u.status1.flags |= cpu_to_le16(
2825                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2826                             CTIO7_FLAGS_CONFORM_REQ);
2827                 }
2828 skip_explict_conf:
2829                 ctio->u.status1.flags &=
2830                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2831                 ctio->u.status1.flags |=
2832                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2833                 ctio->u.status1.scsi_status |=
2834                     cpu_to_le16(SS_SENSE_LEN_VALID);
2835                 ctio->u.status1.sense_length =
2836                     cpu_to_le16(prm->sense_buffer_len);
2837                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2838                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2839                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2840
2841                 qlt_print_dif_err(prm);
2842
2843         } else {
2844                 ctio->u.status1.flags &=
2845                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2846                 ctio->u.status1.flags |=
2847                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2848                 ctio->u.status1.sense_length = 0;
2849                 memset(ctio->u.status1.sense_data, 0,
2850                     sizeof(ctio->u.status1.sense_data));
2851         }
2852
2853         /* Sense with len > 24, is it possible ??? */
2854 }
2855
2856 static inline int
2857 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2858 {
2859         switch (se_cmd->prot_op) {
2860         case TARGET_PROT_DOUT_INSERT:
2861         case TARGET_PROT_DIN_STRIP:
2862                 if (ql2xenablehba_err_chk >= 1)
2863                         return 1;
2864                 break;
2865         case TARGET_PROT_DOUT_PASS:
2866         case TARGET_PROT_DIN_PASS:
2867                 if (ql2xenablehba_err_chk >= 2)
2868                         return 1;
2869                 break;
2870         case TARGET_PROT_DIN_INSERT:
2871         case TARGET_PROT_DOUT_STRIP:
2872                 return 1;
2873         default:
2874                 break;
2875         }
2876         return 0;
2877 }
2878
2879 static inline int
2880 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2881 {
2882         switch (se_cmd->prot_op) {
2883         case TARGET_PROT_DIN_INSERT:
2884         case TARGET_PROT_DOUT_INSERT:
2885         case TARGET_PROT_DIN_STRIP:
2886         case TARGET_PROT_DOUT_STRIP:
2887         case TARGET_PROT_DIN_PASS:
2888         case TARGET_PROT_DOUT_PASS:
2889             return 1;
2890         default:
2891             return 0;
2892         }
2893         return 0;
2894 }
2895
2896 /*
2897  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2898  */
2899 static void
2900 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2901     uint16_t *pfw_prot_opts)
2902 {
2903         struct se_cmd *se_cmd = &cmd->se_cmd;
2904         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2905         scsi_qla_host_t *vha = cmd->tgt->vha;
2906         struct qla_hw_data *ha = vha->hw;
2907         uint32_t t32 = 0;
2908
2909         /*
2910          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2911          * have been immplemented by TCM, before AppTag is avail.
2912          * Look for modesense_handlers[]
2913          */
2914         ctx->app_tag = 0;
2915         ctx->app_tag_mask[0] = 0x0;
2916         ctx->app_tag_mask[1] = 0x0;
2917
2918         if (IS_PI_UNINIT_CAPABLE(ha)) {
2919                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2920                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2921                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2922                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2923                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2924         }
2925
2926         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2927
2928         switch (se_cmd->prot_type) {
2929         case TARGET_DIF_TYPE0_PROT:
2930                 /*
2931                  * No check for ql2xenablehba_err_chk, as it
2932                  * would be an I/O error if hba tag generation
2933                  * is not done.
2934                  */
2935                 ctx->ref_tag = cpu_to_le32(lba);
2936                 /* enable ALL bytes of the ref tag */
2937                 ctx->ref_tag_mask[0] = 0xff;
2938                 ctx->ref_tag_mask[1] = 0xff;
2939                 ctx->ref_tag_mask[2] = 0xff;
2940                 ctx->ref_tag_mask[3] = 0xff;
2941                 break;
2942         case TARGET_DIF_TYPE1_PROT:
2943             /*
2944              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2945              * REF tag, and 16 bit app tag.
2946              */
2947             ctx->ref_tag = cpu_to_le32(lba);
2948             if (!qla_tgt_ref_mask_check(se_cmd) ||
2949                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2950                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2951                     break;
2952             }
2953             /* enable ALL bytes of the ref tag */
2954             ctx->ref_tag_mask[0] = 0xff;
2955             ctx->ref_tag_mask[1] = 0xff;
2956             ctx->ref_tag_mask[2] = 0xff;
2957             ctx->ref_tag_mask[3] = 0xff;
2958             break;
2959         case TARGET_DIF_TYPE2_PROT:
2960             /*
2961              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2962              * tag has to match LBA in CDB + N
2963              */
2964             ctx->ref_tag = cpu_to_le32(lba);
2965             if (!qla_tgt_ref_mask_check(se_cmd) ||
2966                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2967                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2968                     break;
2969             }
2970             /* enable ALL bytes of the ref tag */
2971             ctx->ref_tag_mask[0] = 0xff;
2972             ctx->ref_tag_mask[1] = 0xff;
2973             ctx->ref_tag_mask[2] = 0xff;
2974             ctx->ref_tag_mask[3] = 0xff;
2975             break;
2976         case TARGET_DIF_TYPE3_PROT:
2977             /* For TYPE 3 protection: 16 bit GUARD only */
2978             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2979             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2980                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2981             break;
2982         }
2983 }
2984
2985 static inline int
2986 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2987 {
2988         struct dsd64            *cur_dsd;
2989         uint32_t                transfer_length = 0;
2990         uint32_t                data_bytes;
2991         uint32_t                dif_bytes;
2992         uint8_t                 bundling = 1;
2993         struct crc_context      *crc_ctx_pkt = NULL;
2994         struct qla_hw_data      *ha;
2995         struct ctio_crc2_to_fw  *pkt;
2996         dma_addr_t              crc_ctx_dma;
2997         uint16_t                fw_prot_opts = 0;
2998         struct qla_tgt_cmd      *cmd = prm->cmd;
2999         struct se_cmd           *se_cmd = &cmd->se_cmd;
3000         uint32_t h;
3001         struct atio_from_isp *atio = &prm->cmd->atio;
3002         struct qla_tc_param     tc;
3003         uint16_t t16;
3004         scsi_qla_host_t *vha = cmd->vha;
3005
3006         ha = vha->hw;
3007
3008         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3009         prm->pkt = pkt;
3010         memset(pkt, 0, sizeof(*pkt));
3011
3012         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3013                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3014                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3015                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3016
3017         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3018             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3019                 bundling = 0;
3020
3021         /* Compute dif len and adjust data len to incude protection */
3022         data_bytes = cmd->bufflen;
3023         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3024
3025         switch (se_cmd->prot_op) {
3026         case TARGET_PROT_DIN_INSERT:
3027         case TARGET_PROT_DOUT_STRIP:
3028                 transfer_length = data_bytes;
3029                 if (cmd->prot_sg_cnt)
3030                         data_bytes += dif_bytes;
3031                 break;
3032         case TARGET_PROT_DIN_STRIP:
3033         case TARGET_PROT_DOUT_INSERT:
3034         case TARGET_PROT_DIN_PASS:
3035         case TARGET_PROT_DOUT_PASS:
3036                 transfer_length = data_bytes + dif_bytes;
3037                 break;
3038         default:
3039                 BUG();
3040                 break;
3041         }
3042
3043         if (!qlt_hba_err_chk_enabled(se_cmd))
3044                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3045         /* HBA error checking enabled */
3046         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3047                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3048                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3049                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3050                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3051                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3052         }
3053
3054         switch (se_cmd->prot_op) {
3055         case TARGET_PROT_DIN_INSERT:
3056         case TARGET_PROT_DOUT_INSERT:
3057                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3058                 break;
3059         case TARGET_PROT_DIN_STRIP:
3060         case TARGET_PROT_DOUT_STRIP:
3061                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3062                 break;
3063         case TARGET_PROT_DIN_PASS:
3064         case TARGET_PROT_DOUT_PASS:
3065                 fw_prot_opts |= PO_MODE_DIF_PASS;
3066                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3067                 break;
3068         default:/* Normal Request */
3069                 fw_prot_opts |= PO_MODE_DIF_PASS;
3070                 break;
3071         }
3072
3073         /* ---- PKT ---- */
3074         /* Update entry type to indicate Command Type CRC_2 IOCB */
3075         pkt->entry_type  = CTIO_CRC2;
3076         pkt->entry_count = 1;
3077         pkt->vp_index = cmd->vp_idx;
3078
3079         h = qlt_make_handle(qpair);
3080         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3081                 /*
3082                  * CTIO type 7 from the firmware doesn't provide a way to
3083                  * know the initiator's LOOP ID, hence we can't find
3084                  * the session and, so, the command.
3085                  */
3086                 return -EAGAIN;
3087         } else
3088                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3089
3090         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3091         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3092         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3093         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3094         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3095         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3096
3097         /* silence compile warning */
3098         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3099         pkt->ox_id  = cpu_to_le16(t16);
3100
3101         t16 = (atio->u.isp24.attr << 9);
3102         pkt->flags |= cpu_to_le16(t16);
3103         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3104
3105         /* Set transfer direction */
3106         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3107                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3108         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3109                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3110
3111         pkt->dseg_count = prm->tot_dsds;
3112         /* Fibre channel byte count */
3113         pkt->transfer_length = cpu_to_le32(transfer_length);
3114
3115         /* ----- CRC context -------- */
3116
3117         /* Allocate CRC context from global pool */
3118         crc_ctx_pkt = cmd->ctx =
3119             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3120
3121         if (!crc_ctx_pkt)
3122                 goto crc_queuing_error;
3123
3124         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3125         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3126
3127         /* Set handle */
3128         crc_ctx_pkt->handle = pkt->handle;
3129
3130         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3131
3132         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3133         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3134
3135         if (!bundling) {
3136                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3137         } else {
3138                 /*
3139                  * Configure Bundling if we need to fetch interlaving
3140                  * protection PCI accesses
3141                  */
3142                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3143                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3144                 crc_ctx_pkt->u.bundling.dseg_count =
3145                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3146                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3147         }
3148
3149         /* Finish the common fields of CRC pkt */
3150         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3151         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3152         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3153         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3154
3155         memset((uint8_t *)&tc, 0 , sizeof(tc));
3156         tc.vha = vha;
3157         tc.blk_sz = cmd->blk_sz;
3158         tc.bufflen = cmd->bufflen;
3159         tc.sg = cmd->sg;
3160         tc.prot_sg = cmd->prot_sg;
3161         tc.ctx = crc_ctx_pkt;
3162         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3163
3164         /* Walks data segments */
3165         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3166
3167         if (!bundling && prm->prot_seg_cnt) {
3168                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3169                         prm->tot_dsds, &tc))
3170                         goto crc_queuing_error;
3171         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3172                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3173                 goto crc_queuing_error;
3174
3175         if (bundling && prm->prot_seg_cnt) {
3176                 /* Walks dif segments */
3177                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3178
3179                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3180                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3181                         prm->prot_seg_cnt, cmd))
3182                         goto crc_queuing_error;
3183         }
3184         return QLA_SUCCESS;
3185
3186 crc_queuing_error:
3187         /* Cleanup will be performed by the caller */
3188         qpair->req->outstanding_cmds[h] = NULL;
3189
3190         return QLA_FUNCTION_FAILED;
3191 }
3192
3193 /*
3194  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3195  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3196  */
3197 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3198         uint8_t scsi_status)
3199 {
3200         struct scsi_qla_host *vha = cmd->vha;
3201         struct qla_qpair *qpair = cmd->qpair;
3202         struct ctio7_to_24xx *pkt;
3203         struct qla_tgt_prm prm;
3204         uint32_t full_req_cnt = 0;
3205         unsigned long flags = 0;
3206         int res;
3207
3208         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3209             (cmd->sess && cmd->sess->deleted)) {
3210                 cmd->state = QLA_TGT_STATE_PROCESSED;
3211                 return 0;
3212         }
3213
3214         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3215             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3216             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3217             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3218             &cmd->se_cmd, qpair->id);
3219
3220         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3221             &full_req_cnt);
3222         if (unlikely(res != 0)) {
3223                 return res;
3224         }
3225
3226         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3227
3228         if (xmit_type == QLA_TGT_XMIT_STATUS)
3229                 qpair->tgt_counters.core_qla_snd_status++;
3230         else
3231                 qpair->tgt_counters.core_qla_que_buf++;
3232
3233         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3234                 /*
3235                  * Either the port is not online or this request was from
3236                  * previous life, just abort the processing.
3237                  */
3238                 cmd->state = QLA_TGT_STATE_PROCESSED;
3239                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3240                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3241                         vha->flags.online, qla2x00_reset_active(vha),
3242                         cmd->reset_count, qpair->chip_reset);
3243                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3244                 return 0;
3245         }
3246
3247         /* Does F/W have an IOCBs for this request */
3248         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3249         if (unlikely(res))
3250                 goto out_unmap_unlock;
3251
3252         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3253                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3254         else
3255                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3256         if (unlikely(res != 0)) {
3257                 qpair->req->cnt += full_req_cnt;
3258                 goto out_unmap_unlock;
3259         }
3260
3261         pkt = (struct ctio7_to_24xx *)prm.pkt;
3262
3263         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3264                 pkt->u.status0.flags |=
3265                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3266                         CTIO7_FLAGS_STATUS_MODE_0);
3267
3268                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3269                         qlt_load_data_segments(&prm);
3270
3271                 if (prm.add_status_pkt == 0) {
3272                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3273                                 pkt->u.status0.scsi_status =
3274                                     cpu_to_le16(prm.rq_result);
3275                                 pkt->u.status0.residual =
3276                                     cpu_to_le32(prm.residual);
3277                                 pkt->u.status0.flags |= cpu_to_le16(
3278                                     CTIO7_FLAGS_SEND_STATUS);
3279                                 if (qlt_need_explicit_conf(cmd, 0)) {
3280                                         pkt->u.status0.flags |=
3281                                             cpu_to_le16(
3282                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3283                                                 CTIO7_FLAGS_CONFORM_REQ);
3284                                 }
3285                         }
3286
3287                 } else {
3288                         /*
3289                          * We have already made sure that there is sufficient
3290                          * amount of request entries to not drop HW lock in
3291                          * req_pkt().
3292                          */
3293                         struct ctio7_to_24xx *ctio =
3294                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3295                                     qpair->req);
3296
3297                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3298                             "Building additional status packet 0x%p.\n",
3299                             ctio);
3300
3301                         /*
3302                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3303                          * ctio7_to_24xx
3304                          */
3305                         memcpy(ctio, pkt, sizeof(*ctio));
3306                         /* reset back to CTIO7 */
3307                         ctio->entry_count = 1;
3308                         ctio->entry_type = CTIO_TYPE7;
3309                         ctio->dseg_count = 0;
3310                         ctio->u.status1.flags &= ~cpu_to_le16(
3311                             CTIO7_FLAGS_DATA_IN);
3312
3313                         /* Real finish is ctio_m1's finish */
3314                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3315                         pkt->u.status0.flags |= cpu_to_le16(
3316                             CTIO7_FLAGS_DONT_RET_CTIO);
3317
3318                         /* qlt_24xx_init_ctio_to_isp will correct
3319                          * all neccessary fields that's part of CTIO7.
3320                          * There should be no residual of CTIO-CRC2 data.
3321                          */
3322                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3323                             &prm);
3324                 }
3325         } else
3326                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3327
3328
3329         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3330         cmd->cmd_sent_to_fw = 1;
3331         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3332
3333         /* Memory Barrier */
3334         wmb();
3335         if (qpair->reqq_start_iocbs)
3336                 qpair->reqq_start_iocbs(qpair);
3337         else
3338                 qla2x00_start_iocbs(vha, qpair->req);
3339         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3340
3341         return 0;
3342
3343 out_unmap_unlock:
3344         qlt_unmap_sg(vha, cmd);
3345         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3346
3347         return res;
3348 }
3349 EXPORT_SYMBOL(qlt_xmit_response);
3350
3351 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3352 {
3353         struct ctio7_to_24xx *pkt;
3354         struct scsi_qla_host *vha = cmd->vha;
3355         struct qla_tgt *tgt = cmd->tgt;
3356         struct qla_tgt_prm prm;
3357         unsigned long flags = 0;
3358         int res = 0;
3359         struct qla_qpair *qpair = cmd->qpair;
3360
3361         memset(&prm, 0, sizeof(prm));
3362         prm.cmd = cmd;
3363         prm.tgt = tgt;
3364         prm.sg = NULL;
3365         prm.req_cnt = 1;
3366
3367         /* Calculate number of entries and segments required */
3368         if (qlt_pci_map_calc_cnt(&prm) != 0)
3369                 return -EAGAIN;
3370
3371         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3372             (cmd->sess && cmd->sess->deleted)) {
3373                 /*
3374                  * Either the port is not online or this request was from
3375                  * previous life, just abort the processing.
3376                  */
3377                 cmd->aborted = 1;
3378                 cmd->write_data_transferred = 0;
3379                 cmd->state = QLA_TGT_STATE_DATA_IN;
3380                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3381                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3382                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3383                         vha->flags.online, qla2x00_reset_active(vha),
3384                         cmd->reset_count, qpair->chip_reset);
3385                 return 0;
3386         }
3387
3388         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3389         /* Does F/W have an IOCBs for this request */
3390         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3391         if (res != 0)
3392                 goto out_unlock_free_unmap;
3393         if (cmd->se_cmd.prot_op)
3394                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3395         else
3396                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3397
3398         if (unlikely(res != 0)) {
3399                 qpair->req->cnt += prm.req_cnt;
3400                 goto out_unlock_free_unmap;
3401         }
3402
3403         pkt = (struct ctio7_to_24xx *)prm.pkt;
3404         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3405             CTIO7_FLAGS_STATUS_MODE_0);
3406
3407         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3408                 qlt_load_data_segments(&prm);
3409
3410         cmd->state = QLA_TGT_STATE_NEED_DATA;
3411         cmd->cmd_sent_to_fw = 1;
3412         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3413
3414         /* Memory Barrier */
3415         wmb();
3416         if (qpair->reqq_start_iocbs)
3417                 qpair->reqq_start_iocbs(qpair);
3418         else
3419                 qla2x00_start_iocbs(vha, qpair->req);
3420         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3421
3422         return res;
3423
3424 out_unlock_free_unmap:
3425         qlt_unmap_sg(vha, cmd);
3426         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3427
3428         return res;
3429 }
3430 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3431
3432
3433 /*
3434  * it is assumed either hardware_lock or qpair lock is held.
3435  */
3436 static void
3437 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3438         struct ctio_crc_from_fw *sts)
3439 {
3440         uint8_t         *ap = &sts->actual_dif[0];
3441         uint8_t         *ep = &sts->expected_dif[0];
3442         uint64_t        lba = cmd->se_cmd.t_task_lba;
3443         uint8_t scsi_status, sense_key, asc, ascq;
3444         unsigned long flags;
3445         struct scsi_qla_host *vha = cmd->vha;
3446
3447         cmd->trc_flags |= TRC_DIF_ERR;
3448
3449         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3450         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3451         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3452
3453         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3454         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3455         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3456
3457         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3458             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3459
3460         scsi_status = sense_key = asc = ascq = 0;
3461
3462         /* check appl tag */
3463         if (cmd->e_app_tag != cmd->a_app_tag) {
3464                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3465                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3466                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3467                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3468                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3469                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3470
3471                 cmd->dif_err_code = DIF_ERR_APP;
3472                 scsi_status = SAM_STAT_CHECK_CONDITION;
3473                 sense_key = ABORTED_COMMAND;
3474                 asc = 0x10;
3475                 ascq = 0x2;
3476         }
3477
3478         /* check ref tag */
3479         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3480                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3481                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3482                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3483                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3484                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3485                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3486
3487                 cmd->dif_err_code = DIF_ERR_REF;
3488                 scsi_status = SAM_STAT_CHECK_CONDITION;
3489                 sense_key = ABORTED_COMMAND;
3490                 asc = 0x10;
3491                 ascq = 0x3;
3492                 goto out;
3493         }
3494
3495         /* check guard */
3496         if (cmd->e_guard != cmd->a_guard) {
3497                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3498                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3499                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3500                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3501                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3502                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3503
3504                 cmd->dif_err_code = DIF_ERR_GRD;
3505                 scsi_status = SAM_STAT_CHECK_CONDITION;
3506                 sense_key = ABORTED_COMMAND;
3507                 asc = 0x10;
3508                 ascq = 0x1;
3509         }
3510 out:
3511         switch (cmd->state) {
3512         case QLA_TGT_STATE_NEED_DATA:
3513                 /* handle_data will load DIF error code  */
3514                 cmd->state = QLA_TGT_STATE_DATA_IN;
3515                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3516                 break;
3517         default:
3518                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3519                 if (cmd->aborted) {
3520                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3521                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3522                         break;
3523                 }
3524                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3525
3526                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3527                     ascq);
3528                 /* assume scsi status gets out on the wire.
3529                  * Will not wait for completion.
3530                  */
3531                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3532                 break;
3533         }
3534 }
3535
3536 /* If hardware_lock held on entry, might drop it, then reaquire */
3537 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3538 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3539         struct imm_ntfy_from_isp *ntfy)
3540 {
3541         struct nack_to_isp *nack;
3542         struct qla_hw_data *ha = vha->hw;
3543         request_t *pkt;
3544         int ret = 0;
3545
3546         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3547             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3548
3549         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3550         if (pkt == NULL) {
3551                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3552                     "qla_target(%d): %s failed: unable to allocate "
3553                     "request packet\n", vha->vp_idx, __func__);
3554                 return -ENOMEM;
3555         }
3556
3557         pkt->entry_type = NOTIFY_ACK_TYPE;
3558         pkt->entry_count = 1;
3559         pkt->handle = QLA_TGT_SKIP_HANDLE;
3560
3561         nack = (struct nack_to_isp *)pkt;
3562         nack->ox_id = ntfy->ox_id;
3563
3564         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3565         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3566                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3567                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3568         }
3569
3570         /* terminate */
3571         nack->u.isp24.flags |=
3572                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3573
3574         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3575         nack->u.isp24.status = ntfy->u.isp24.status;
3576         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3577         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3578         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3579         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3580         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3581         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3582
3583         qla2x00_start_iocbs(vha, vha->req);
3584         return ret;
3585 }
3586
3587 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3588         struct imm_ntfy_from_isp *imm, int ha_locked)
3589 {
3590         int rc;
3591
3592         WARN_ON_ONCE(!ha_locked);
3593         rc = __qlt_send_term_imm_notif(vha, imm);
3594         pr_debug("rc = %d\n", rc);
3595 }
3596
3597 /*
3598  * If hardware_lock held on entry, might drop it, then reaquire
3599  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3600  */
3601 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3602         struct qla_tgt_cmd *cmd,
3603         struct atio_from_isp *atio)
3604 {
3605         struct scsi_qla_host *vha = qpair->vha;
3606         struct ctio7_to_24xx *ctio24;
3607         struct qla_hw_data *ha = vha->hw;
3608         request_t *pkt;
3609         int ret = 0;
3610         uint16_t temp;
3611
3612         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3613
3614         if (cmd)
3615                 vha = cmd->vha;
3616
3617         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3618         if (pkt == NULL) {
3619                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3620                     "qla_target(%d): %s failed: unable to allocate "
3621                     "request packet\n", vha->vp_idx, __func__);
3622                 return -ENOMEM;
3623         }
3624
3625         if (cmd != NULL) {
3626                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3627                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3628                             "qla_target(%d): Terminating cmd %p with "
3629                             "incorrect state %d\n", vha->vp_idx, cmd,
3630                             cmd->state);
3631                 } else
3632                         ret = 1;
3633         }
3634
3635         qpair->tgt_counters.num_term_xchg_sent++;
3636         pkt->entry_count = 1;
3637         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3638
3639         ctio24 = (struct ctio7_to_24xx *)pkt;
3640         ctio24->entry_type = CTIO_TYPE7;
3641         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3642         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3643         ctio24->vp_index = vha->vp_idx;
3644         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3645         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3646         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3647                 CTIO7_FLAGS_TERMINATE;
3648         ctio24->u.status1.flags = cpu_to_le16(temp);
3649         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3650         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3651
3652         /* Memory Barrier */
3653         wmb();
3654         if (qpair->reqq_start_iocbs)
3655                 qpair->reqq_start_iocbs(qpair);
3656         else
3657                 qla2x00_start_iocbs(vha, qpair->req);
3658         return ret;
3659 }
3660
3661 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3662         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3663         int ul_abort)
3664 {
3665         struct scsi_qla_host *vha;
3666         unsigned long flags = 0;
3667         int rc;
3668
3669         /* why use different vha? NPIV */
3670         if (cmd)
3671                 vha = cmd->vha;
3672         else
3673                 vha = qpair->vha;
3674
3675         if (ha_locked) {
3676                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3677                 if (rc == -ENOMEM)
3678                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3679                 goto done;
3680         }
3681         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3682         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3683         if (rc == -ENOMEM)
3684                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3685
3686 done:
3687         if (cmd && !ul_abort && !cmd->aborted) {
3688                 if (cmd->sg_mapped)
3689                         qlt_unmap_sg(vha, cmd);
3690                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3691         }
3692
3693         if (!ha_locked)
3694                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3695
3696         return;
3697 }
3698
3699 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3700 {
3701         struct list_head free_list;
3702         struct qla_tgt_cmd *cmd, *tcmd;
3703
3704         vha->hw->tgt.leak_exchg_thresh_hold =
3705             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3706
3707         cmd = tcmd = NULL;
3708         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3709                 INIT_LIST_HEAD(&free_list);
3710                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3711
3712                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3713                         list_del(&cmd->cmd_list);
3714                         /* This cmd was never sent to TCM.  There is no need
3715                          * to schedule free or call free_cmd
3716                          */
3717                         qlt_free_cmd(cmd);
3718                         vha->hw->tgt.num_qfull_cmds_alloc--;
3719                 }
3720         }
3721         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3722 }
3723
3724 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3725 {
3726         uint32_t total_leaked;
3727
3728         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3729
3730         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3731             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3732
3733                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3734                     "Chip reset due to exchange starvation: %d/%d.\n",
3735                     total_leaked, vha->hw->cur_fw_xcb_count);
3736
3737                 if (IS_P3P_TYPE(vha->hw))
3738                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3739                 else
3740                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3741                 qla2xxx_wake_dpc(vha);
3742         }
3743
3744 }
3745
3746 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3747 {
3748         struct qla_tgt *tgt = cmd->tgt;
3749         struct scsi_qla_host *vha = tgt->vha;
3750         struct se_cmd *se_cmd = &cmd->se_cmd;
3751         unsigned long flags;
3752
3753         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3754             "qla_target(%d): terminating exchange for aborted cmd=%p "
3755             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3756             se_cmd->tag);
3757
3758         spin_lock_irqsave(&cmd->cmd_lock, flags);
3759         if (cmd->aborted) {
3760                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3761                 /*
3762                  * It's normal to see 2 calls in this path:
3763                  *  1) XFER Rdy completion + CMD_T_ABORT
3764                  *  2) TCM TMR - drain_state_list
3765                  */
3766                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3767                     "multiple abort. %p transport_state %x, t_state %x, "
3768                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3769                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3770                 return EIO;
3771         }
3772         cmd->aborted = 1;
3773         cmd->trc_flags |= TRC_ABORT;
3774         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3775
3776         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3777         return 0;
3778 }
3779 EXPORT_SYMBOL(qlt_abort_cmd);
3780
3781 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3782 {
3783         struct fc_port *sess = cmd->sess;
3784
3785         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3786             "%s: se_cmd[%p] ox_id %04x\n",
3787             __func__, &cmd->se_cmd,
3788             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3789
3790         BUG_ON(cmd->cmd_in_wq);
3791
3792         if (cmd->sg_mapped)
3793                 qlt_unmap_sg(cmd->vha, cmd);
3794
3795         if (!cmd->q_full)
3796                 qlt_decr_num_pend_cmds(cmd->vha);
3797
3798         BUG_ON(cmd->sg_mapped);
3799         cmd->jiffies_at_free = get_jiffies_64();
3800         if (unlikely(cmd->free_sg))
3801                 kfree(cmd->sg);
3802
3803         if (!sess || !sess->se_sess) {
3804                 WARN_ON(1);
3805                 return;
3806         }
3807         cmd->jiffies_at_free = get_jiffies_64();
3808         target_free_tag(sess->se_sess, &cmd->se_cmd);
3809 }
3810 EXPORT_SYMBOL(qlt_free_cmd);
3811
3812 /*
3813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3814  */
3815 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3816         struct qla_tgt_cmd *cmd, uint32_t status)
3817 {
3818         int term = 0;
3819         struct scsi_qla_host *vha = qpair->vha;
3820
3821         if (cmd->se_cmd.prot_op)
3822                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3823                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3824                     "se_cmd=%p tag[%x] op %#x/%s",
3825                      cmd->lba, cmd->lba,
3826                      cmd->num_blks, &cmd->se_cmd,
3827                      cmd->atio.u.isp24.exchange_addr,
3828                      cmd->se_cmd.prot_op,
3829                      prot_op_str(cmd->se_cmd.prot_op));
3830
3831         if (ctio != NULL) {
3832                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3833
3834                 term = !(c->flags &
3835                     cpu_to_le16(OF_TERM_EXCH));
3836         } else
3837                 term = 1;
3838
3839         if (term)
3840                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3841
3842         return term;
3843 }
3844
3845
3846 /* ha->hardware_lock supposed to be held on entry */
3847 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3848         struct rsp_que *rsp, uint32_t handle, void *ctio)
3849 {
3850         void *cmd = NULL;
3851         struct req_que *req;
3852         int qid = GET_QID(handle);
3853         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3854
3855         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3856                 return NULL;
3857
3858         if (qid == rsp->req->id) {
3859                 req = rsp->req;
3860         } else if (vha->hw->req_q_map[qid]) {
3861                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3862                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3863                     vha->vp_idx, rsp->id, handle);
3864                 req = vha->hw->req_q_map[qid];
3865         } else {
3866                 return NULL;
3867         }
3868
3869         h &= QLA_CMD_HANDLE_MASK;
3870
3871         if (h != QLA_TGT_NULL_HANDLE) {
3872                 if (unlikely(h >= req->num_outstanding_cmds)) {
3873                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3874                             "qla_target(%d): Wrong handle %x received\n",
3875                             vha->vp_idx, handle);
3876                         return NULL;
3877                 }
3878
3879                 cmd = (void *) req->outstanding_cmds[h];
3880                 if (unlikely(cmd == NULL)) {
3881                         ql_dbg(ql_dbg_async, vha, 0xe053,
3882                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3883                                 vha->vp_idx, handle, req->id, rsp->id);
3884                         return NULL;
3885                 }
3886                 req->outstanding_cmds[h] = NULL;
3887         } else if (ctio != NULL) {
3888                 /* We can't get loop ID from CTIO7 */
3889                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3890                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3891                     "support NULL handles\n", vha->vp_idx);
3892                 return NULL;
3893         }
3894
3895         return cmd;
3896 }
3897
3898 /*
3899  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3900  */
3901 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3902     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3903 {
3904         struct qla_hw_data *ha = vha->hw;
3905         struct se_cmd *se_cmd;
3906         struct qla_tgt_cmd *cmd;
3907         struct qla_qpair *qpair = rsp->qpair;
3908
3909         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3910                 /* That could happen only in case of an error/reset/abort */
3911                 if (status != CTIO_SUCCESS) {
3912                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3913                             "Intermediate CTIO received"
3914                             " (status %x)\n", status);
3915                 }
3916                 return;
3917         }
3918
3919         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3920         if (cmd == NULL)
3921                 return;
3922
3923         se_cmd = &cmd->se_cmd;
3924         cmd->cmd_sent_to_fw = 0;
3925
3926         qlt_unmap_sg(vha, cmd);
3927
3928         if (unlikely(status != CTIO_SUCCESS)) {
3929                 switch (status & 0xFFFF) {
3930                 case CTIO_INVALID_RX_ID:
3931                         if (printk_ratelimit())
3932                                 dev_info(&vha->hw->pdev->dev,
3933                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3934                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3935                                     ((cmd->ctio_flags >> 9) & 0xf),
3936                                     cmd->ctio_flags);
3937
3938                         break;
3939                 case CTIO_LIP_RESET:
3940                 case CTIO_TARGET_RESET:
3941                 case CTIO_ABORTED:
3942                         /* driver request abort via Terminate exchange */
3943                 case CTIO_TIMEOUT:
3944                         /* They are OK */
3945                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3946                             "qla_target(%d): CTIO with "
3947                             "status %#x received, state %x, se_cmd %p, "
3948                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3949                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3950                             status, cmd->state, se_cmd);
3951                         break;
3952
3953                 case CTIO_PORT_LOGGED_OUT:
3954                 case CTIO_PORT_UNAVAILABLE:
3955                 {
3956                         int logged_out =
3957                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3958
3959                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3960                             "qla_target(%d): CTIO with %s status %x "
3961                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3962                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3963                             status, cmd->state, se_cmd);
3964
3965                         if (logged_out && cmd->sess) {
3966                                 /*
3967                                  * Session is already logged out, but we need
3968                                  * to notify initiator, who's not aware of this
3969                                  */
3970                                 cmd->sess->send_els_logo = 1;
3971                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3972                                     "%s %d %8phC post del sess\n",
3973                                     __func__, __LINE__, cmd->sess->port_name);
3974
3975                                 qlt_schedule_sess_for_deletion(cmd->sess);
3976                         }
3977                         break;
3978                 }
3979                 case CTIO_DIF_ERROR: {
3980                         struct ctio_crc_from_fw *crc =
3981                                 (struct ctio_crc_from_fw *)ctio;
3982                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3983                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3984                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3985                             "expect_dif[0x%llx]\n",
3986                             vha->vp_idx, status, cmd->state, se_cmd,
3987                             *((u64 *)&crc->actual_dif[0]),
3988                             *((u64 *)&crc->expected_dif[0]));
3989
3990                         qlt_handle_dif_error(qpair, cmd, ctio);
3991                         return;
3992                 }
3993                 default:
3994                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3995                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3996                             vha->vp_idx, status, cmd->state, se_cmd);
3997                         break;
3998                 }
3999
4000
4001                 /* "cmd->aborted" means
4002                  * cmd is already aborted/terminated, we don't
4003                  * need to terminate again.  The exchange is already
4004                  * cleaned up/freed at FW level.  Just cleanup at driver
4005                  * level.
4006                  */
4007                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4008                     (!cmd->aborted)) {
4009                         cmd->trc_flags |= TRC_CTIO_ERR;
4010                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4011                                 return;
4012                 }
4013         }
4014
4015         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4016                 cmd->trc_flags |= TRC_CTIO_DONE;
4017         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4018                 cmd->state = QLA_TGT_STATE_DATA_IN;
4019
4020                 if (status == CTIO_SUCCESS)
4021                         cmd->write_data_transferred = 1;
4022
4023                 ha->tgt.tgt_ops->handle_data(cmd);
4024                 return;
4025         } else if (cmd->aborted) {
4026                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4027                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4028                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4029         } else {
4030                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4031                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4032                     "qla_target(%d): A command in state (%d) should "
4033                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4034         }
4035
4036         if (unlikely(status != CTIO_SUCCESS) &&
4037                 !cmd->aborted) {
4038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4039                 dump_stack();
4040         }
4041
4042         ha->tgt.tgt_ops->free_cmd(cmd);
4043 }
4044
4045 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4046         uint8_t task_codes)
4047 {
4048         int fcp_task_attr;
4049
4050         switch (task_codes) {
4051         case ATIO_SIMPLE_QUEUE:
4052                 fcp_task_attr = TCM_SIMPLE_TAG;
4053                 break;
4054         case ATIO_HEAD_OF_QUEUE:
4055                 fcp_task_attr = TCM_HEAD_TAG;
4056                 break;
4057         case ATIO_ORDERED_QUEUE:
4058                 fcp_task_attr = TCM_ORDERED_TAG;
4059                 break;
4060         case ATIO_ACA_QUEUE:
4061                 fcp_task_attr = TCM_ACA_TAG;
4062                 break;
4063         case ATIO_UNTAGGED:
4064                 fcp_task_attr = TCM_SIMPLE_TAG;
4065                 break;
4066         default:
4067                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4068                     "qla_target: unknown task code %x, use ORDERED instead\n",
4069                     task_codes);
4070                 fcp_task_attr = TCM_ORDERED_TAG;
4071                 break;
4072         }
4073
4074         return fcp_task_attr;
4075 }
4076
4077 /*
4078  * Process context for I/O path into tcm_qla2xxx code
4079  */
4080 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4081 {
4082         scsi_qla_host_t *vha = cmd->vha;
4083         struct qla_hw_data *ha = vha->hw;
4084         struct fc_port *sess = cmd->sess;
4085         struct atio_from_isp *atio = &cmd->atio;
4086         unsigned char *cdb;
4087         unsigned long flags;
4088         uint32_t data_length;
4089         int ret, fcp_task_attr, data_dir, bidi = 0;
4090         struct qla_qpair *qpair = cmd->qpair;
4091
4092         cmd->cmd_in_wq = 0;
4093         cmd->trc_flags |= TRC_DO_WORK;
4094
4095         if (cmd->aborted) {
4096                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4097                     "cmd with tag %u is aborted\n",
4098                     cmd->atio.u.isp24.exchange_addr);
4099                 goto out_term;
4100         }
4101
4102         spin_lock_init(&cmd->cmd_lock);
4103         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4104         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4105
4106         if (atio->u.isp24.fcp_cmnd.rddata &&
4107             atio->u.isp24.fcp_cmnd.wrdata) {
4108                 bidi = 1;
4109                 data_dir = DMA_TO_DEVICE;
4110         } else if (atio->u.isp24.fcp_cmnd.rddata)
4111                 data_dir = DMA_FROM_DEVICE;
4112         else if (atio->u.isp24.fcp_cmnd.wrdata)
4113                 data_dir = DMA_TO_DEVICE;
4114         else
4115                 data_dir = DMA_NONE;
4116
4117         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4118             atio->u.isp24.fcp_cmnd.task_attr);
4119         data_length = get_datalen_for_atio(atio);
4120
4121         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4122                                           fcp_task_attr, data_dir, bidi);
4123         if (ret != 0)
4124                 goto out_term;
4125         /*
4126          * Drop extra session reference from qlt_handle_cmd_for_atio().
4127          */
4128         ha->tgt.tgt_ops->put_sess(sess);
4129         return;
4130
4131 out_term:
4132         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4133         /*
4134          * cmd has not sent to target yet, so pass NULL as the second
4135          * argument to qlt_send_term_exchange() and free the memory here.
4136          */
4137         cmd->trc_flags |= TRC_DO_WORK_ERR;
4138         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4139         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4140
4141         qlt_decr_num_pend_cmds(vha);
4142         target_free_tag(sess->se_sess, &cmd->se_cmd);
4143         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4144
4145         ha->tgt.tgt_ops->put_sess(sess);
4146 }
4147
4148 static void qlt_do_work(struct work_struct *work)
4149 {
4150         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4151         scsi_qla_host_t *vha = cmd->vha;
4152         unsigned long flags;
4153
4154         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4155         list_del(&cmd->cmd_list);
4156         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4157
4158         __qlt_do_work(cmd);
4159 }
4160
4161 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4162 {
4163         unsigned long flags;
4164         struct qla_hw_data *ha = vha->hw;
4165         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4166         void *node;
4167         u64 key = 0;
4168
4169         ql_log(ql_log_info, vha, 0x706c,
4170             "User update Number of Active Qpairs %d\n",
4171             ha->tgt.num_act_qpairs);
4172
4173         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4174
4175         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4176                 btree_remove64(&tgt->lun_qpair_map, key);
4177
4178         ha->base_qpair->lun_cnt = 0;
4179         for (key = 0; key < ha->max_qpairs; key++)
4180                 if (ha->queue_pair_map[key])
4181                         ha->queue_pair_map[key]->lun_cnt = 0;
4182
4183         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4184 }
4185
4186 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4187         struct qla_tgt_cmd *cmd)
4188 {
4189         struct qla_qpair *qpair, *qp;
4190         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4191         struct qla_qpair_hint *h;
4192
4193         if (vha->flags.qpairs_available) {
4194                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4195                 if (unlikely(!h)) {
4196                         /* spread lun to qpair ratio evently */
4197                         int lcnt = 0, rc;
4198                         struct scsi_qla_host *base_vha =
4199                                 pci_get_drvdata(vha->hw->pdev);
4200
4201                         qpair = vha->hw->base_qpair;
4202                         if (qpair->lun_cnt == 0) {
4203                                 qpair->lun_cnt++;
4204                                 h = qla_qpair_to_hint(tgt, qpair);
4205                                 BUG_ON(!h);
4206                                 rc = btree_insert64(&tgt->lun_qpair_map,
4207                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4208                                 if (rc) {
4209                                         qpair->lun_cnt--;
4210                                         ql_log(ql_log_info, vha, 0xd037,
4211                                             "Unable to insert lun %llx into lun_qpair_map\n",
4212                                             cmd->unpacked_lun);
4213                                 }
4214                                 goto out;
4215                         } else {
4216                                 lcnt = qpair->lun_cnt;
4217                         }
4218
4219                         h = NULL;
4220                         list_for_each_entry(qp, &base_vha->qp_list,
4221                             qp_list_elem) {
4222                                 if (qp->lun_cnt == 0) {
4223                                         qp->lun_cnt++;
4224                                         h = qla_qpair_to_hint(tgt, qp);
4225                                         BUG_ON(!h);
4226                                         rc = btree_insert64(&tgt->lun_qpair_map,
4227                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4228                                         if (rc) {
4229                                                 qp->lun_cnt--;
4230                                                 ql_log(ql_log_info, vha, 0xd038,
4231                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4232                                                         cmd->unpacked_lun);
4233                                         }
4234                                         qpair = qp;
4235                                         goto out;
4236                                 } else {
4237                                         if (qp->lun_cnt < lcnt) {
4238                                                 lcnt = qp->lun_cnt;
4239                                                 qpair = qp;
4240                                                 continue;
4241                                         }
4242                                 }
4243                         }
4244                         BUG_ON(!qpair);
4245                         qpair->lun_cnt++;
4246                         h = qla_qpair_to_hint(tgt, qpair);
4247                         BUG_ON(!h);
4248                         rc = btree_insert64(&tgt->lun_qpair_map,
4249                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4250                         if (rc) {
4251                                 qpair->lun_cnt--;
4252                                 ql_log(ql_log_info, vha, 0xd039,
4253                                    "Unable to insert lun %llx into lun_qpair_map\n",
4254                                    cmd->unpacked_lun);
4255                         }
4256                 }
4257         } else {
4258                 h = &tgt->qphints[0];
4259         }
4260 out:
4261         cmd->qpair = h->qpair;
4262         cmd->se_cmd.cpuid = h->cpuid;
4263 }
4264
4265 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4266                                        struct fc_port *sess,
4267                                        struct atio_from_isp *atio)
4268 {
4269         struct se_session *se_sess = sess->se_sess;
4270         struct qla_tgt_cmd *cmd;
4271         int tag, cpu;
4272
4273         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4274         if (tag < 0)
4275                 return NULL;
4276
4277         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4278         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4279         cmd->cmd_type = TYPE_TGT_CMD;
4280         memcpy(&cmd->atio, atio, sizeof(*atio));
4281         cmd->state = QLA_TGT_STATE_NEW;
4282         cmd->tgt = vha->vha_tgt.qla_tgt;
4283         qlt_incr_num_pend_cmds(vha);
4284         cmd->vha = vha;
4285         cmd->se_cmd.map_tag = tag;
4286         cmd->se_cmd.map_cpu = cpu;
4287         cmd->sess = sess;
4288         cmd->loop_id = sess->loop_id;
4289         cmd->conf_compl_supported = sess->conf_compl_supported;
4290
4291         cmd->trc_flags = 0;
4292         cmd->jiffies_at_alloc = get_jiffies_64();
4293
4294         cmd->unpacked_lun = scsilun_to_int(
4295             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4296         qlt_assign_qpair(vha, cmd);
4297         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4298         cmd->vp_idx = vha->vp_idx;
4299
4300         return cmd;
4301 }
4302
4303 /* ha->hardware_lock supposed to be held on entry */
4304 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4305         struct atio_from_isp *atio)
4306 {
4307         struct qla_hw_data *ha = vha->hw;
4308         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4309         struct fc_port *sess;
4310         struct qla_tgt_cmd *cmd;
4311         unsigned long flags;
4312         port_id_t id;
4313
4314         if (unlikely(tgt->tgt_stop)) {
4315                 ql_dbg(ql_dbg_io, vha, 0x3061,
4316                     "New command while device %p is shutting down\n", tgt);
4317                 return -ENODEV;
4318         }
4319
4320         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4321         if (IS_SW_RESV_ADDR(id))
4322                 return -EBUSY;
4323
4324         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4325         if (unlikely(!sess))
4326                 return -EFAULT;
4327
4328         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4329          * session deletion, but it's still in sess_del_work wq */
4330         if (sess->deleted) {
4331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4332                     "New command while old session %p is being deleted\n",
4333                     sess);
4334                 return -EFAULT;
4335         }
4336
4337         /*
4338          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4339          */
4340         if (!kref_get_unless_zero(&sess->sess_kref)) {
4341                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4342                     "%s: kref_get fail, %8phC oxid %x \n",
4343                     __func__, sess->port_name,
4344                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4345                 return -EFAULT;
4346         }
4347
4348         cmd = qlt_get_tag(vha, sess, atio);
4349         if (!cmd) {
4350                 ql_dbg(ql_dbg_io, vha, 0x3062,
4351                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4352                 ha->tgt.tgt_ops->put_sess(sess);
4353                 return -EBUSY;
4354         }
4355
4356         cmd->cmd_in_wq = 1;
4357         cmd->trc_flags |= TRC_NEW_CMD;
4358
4359         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4360         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4361         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4362
4363         INIT_WORK(&cmd->work, qlt_do_work);
4364         if (vha->flags.qpairs_available) {
4365                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4366         } else if (ha->msix_count) {
4367                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4368                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4369                             &cmd->work);
4370                 else
4371                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4372                             &cmd->work);
4373         } else {
4374                 queue_work(qla_tgt_wq, &cmd->work);
4375         }
4376
4377         return 0;
4378 }
4379
4380 /* ha->hardware_lock supposed to be held on entry */
4381 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4382         int fn, void *iocb, int flags)
4383 {
4384         struct scsi_qla_host *vha = sess->vha;
4385         struct qla_hw_data *ha = vha->hw;
4386         struct qla_tgt_mgmt_cmd *mcmd;
4387         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4388         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4389
4390         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4391         if (!mcmd) {
4392                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4393                     "qla_target(%d): Allocation of management "
4394                     "command failed, some commands and their data could "
4395                     "leak\n", vha->vp_idx);
4396                 return -ENOMEM;
4397         }
4398         memset(mcmd, 0, sizeof(*mcmd));
4399         mcmd->sess = sess;
4400
4401         if (iocb) {
4402                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4403                     sizeof(mcmd->orig_iocb.imm_ntfy));
4404         }
4405         mcmd->tmr_func = fn;
4406         mcmd->flags = flags;
4407         mcmd->reset_count = ha->base_qpair->chip_reset;
4408         mcmd->qpair = h->qpair;
4409         mcmd->vha = vha;
4410         mcmd->se_cmd.cpuid = h->cpuid;
4411         mcmd->unpacked_lun = lun;
4412
4413         switch (fn) {
4414         case QLA_TGT_LUN_RESET:
4415         case QLA_TGT_CLEAR_TS:
4416         case QLA_TGT_ABORT_TS:
4417                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4418                 /* fall through */
4419         case QLA_TGT_CLEAR_ACA:
4420                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4421                 mcmd->qpair = h->qpair;
4422                 mcmd->se_cmd.cpuid = h->cpuid;
4423                 break;
4424
4425         case QLA_TGT_TARGET_RESET:
4426         case QLA_TGT_NEXUS_LOSS_SESS:
4427         case QLA_TGT_NEXUS_LOSS:
4428         case QLA_TGT_ABORT_ALL:
4429         default:
4430                 /* no-op */
4431                 break;
4432         }
4433
4434         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4435         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4436             &mcmd->work);
4437
4438         return 0;
4439 }
4440
4441 /* ha->hardware_lock supposed to be held on entry */
4442 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4443 {
4444         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4445         struct qla_hw_data *ha = vha->hw;
4446         struct fc_port *sess;
4447         u64 unpacked_lun;
4448         int fn;
4449         unsigned long flags;
4450
4451         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4452
4453         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4454         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4455             a->u.isp24.fcp_hdr.s_id);
4456         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4457
4458         unpacked_lun =
4459             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4460
4461         if (sess == NULL || sess->deleted)
4462                 return -EFAULT;
4463
4464         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4465 }
4466
4467 /* ha->hardware_lock supposed to be held on entry */
4468 static int __qlt_abort_task(struct scsi_qla_host *vha,
4469         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4470 {
4471         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4472         struct qla_hw_data *ha = vha->hw;
4473         struct qla_tgt_mgmt_cmd *mcmd;
4474         u64 unpacked_lun;
4475         int rc;
4476
4477         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4478         if (mcmd == NULL) {
4479                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4480                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4481                     vha->vp_idx, __func__);
4482                 return -ENOMEM;
4483         }
4484         memset(mcmd, 0, sizeof(*mcmd));
4485
4486         mcmd->sess = sess;
4487         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4488             sizeof(mcmd->orig_iocb.imm_ntfy));
4489
4490         unpacked_lun =
4491             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4492         mcmd->reset_count = ha->base_qpair->chip_reset;
4493         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4494         mcmd->qpair = ha->base_qpair;
4495
4496         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4497             le16_to_cpu(iocb->u.isp2x.seq_id));
4498         if (rc != 0) {
4499                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4500                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4501                     vha->vp_idx, rc);
4502                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4503                 return -EFAULT;
4504         }
4505
4506         return 0;
4507 }
4508
4509 /* ha->hardware_lock supposed to be held on entry */
4510 static int qlt_abort_task(struct scsi_qla_host *vha,
4511         struct imm_ntfy_from_isp *iocb)
4512 {
4513         struct qla_hw_data *ha = vha->hw;
4514         struct fc_port *sess;
4515         int loop_id;
4516         unsigned long flags;
4517
4518         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4519
4520         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4521         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4522         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4523
4524         if (sess == NULL) {
4525                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4526                     "qla_target(%d): task abort for unexisting "
4527                     "session\n", vha->vp_idx);
4528                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4529                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4530         }
4531
4532         return __qlt_abort_task(vha, iocb, sess);
4533 }
4534
4535 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4536 {
4537         if (rc != MBS_COMMAND_COMPLETE) {
4538                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4539                         "%s: se_sess %p / sess %p from"
4540                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4541                         " LOGO failed: %#x\n",
4542                         __func__,
4543                         fcport->se_sess,
4544                         fcport,
4545                         fcport->port_name, fcport->loop_id,
4546                         fcport->d_id.b.domain, fcport->d_id.b.area,
4547                         fcport->d_id.b.al_pa, rc);
4548         }
4549
4550         fcport->logout_completed = 1;
4551 }
4552
4553 /*
4554 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4555 *
4556 * Schedules sessions with matching port_id/loop_id but different wwn for
4557 * deletion. Returns existing session with matching wwn if present.
4558 * Null otherwise.
4559 */
4560 struct fc_port *
4561 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4562     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4563 {
4564         struct fc_port *sess = NULL, *other_sess;
4565         uint64_t other_wwn;
4566
4567         *conflict_sess = NULL;
4568
4569         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4570
4571                 other_wwn = wwn_to_u64(other_sess->port_name);
4572
4573                 if (wwn == other_wwn) {
4574                         WARN_ON(sess);
4575                         sess = other_sess;
4576                         continue;
4577                 }
4578
4579                 /* find other sess with nport_id collision */
4580                 if (port_id.b24 == other_sess->d_id.b24) {
4581                         if (loop_id != other_sess->loop_id) {
4582                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4583                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4584                                     other_sess, other_sess->loop_id, other_wwn);
4585
4586                                 /*
4587                                  * logout_on_delete is set by default, but another
4588                                  * session that has the same s_id/loop_id combo
4589                                  * might have cleared it when requested this session
4590                                  * deletion, so don't touch it
4591                                  */
4592                                 qlt_schedule_sess_for_deletion(other_sess);
4593                         } else {
4594                                 /*
4595                                  * Another wwn used to have our s_id/loop_id
4596                                  * kill the session, but don't free the loop_id
4597                                  */
4598                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4599                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4600                                     other_sess, other_sess->loop_id, other_wwn);
4601
4602                                 other_sess->keep_nport_handle = 1;
4603                                 if (other_sess->disc_state != DSC_DELETED)
4604                                         *conflict_sess = other_sess;
4605                                 qlt_schedule_sess_for_deletion(other_sess);
4606                         }
4607                         continue;
4608                 }
4609
4610                 /* find other sess with nport handle collision */
4611                 if ((loop_id == other_sess->loop_id) &&
4612                         (loop_id != FC_NO_LOOP_ID)) {
4613                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4614                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4615                                other_sess, other_sess->loop_id, other_wwn);
4616
4617                         /* Same loop_id but different s_id
4618                          * Ok to kill and logout */
4619                         qlt_schedule_sess_for_deletion(other_sess);
4620                 }
4621         }
4622
4623         return sess;
4624 }
4625
4626 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4627 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4628 {
4629         struct qla_tgt_sess_op *op;
4630         struct qla_tgt_cmd *cmd;
4631         uint32_t key;
4632         int count = 0;
4633         unsigned long flags;
4634
4635         key = (((u32)s_id->b.domain << 16) |
4636                ((u32)s_id->b.area   <<  8) |
4637                ((u32)s_id->b.al_pa));
4638
4639         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4640         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4641                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4642
4643                 if (op_key == key) {
4644                         op->aborted = true;
4645                         count++;
4646                 }
4647         }
4648
4649         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4650                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4651
4652                 if (op_key == key) {
4653                         op->aborted = true;
4654                         count++;
4655                 }
4656         }
4657
4658         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4659                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4660
4661                 if (cmd_key == key) {
4662                         cmd->aborted = 1;
4663                         count++;
4664                 }
4665         }
4666         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4667
4668         return count;
4669 }
4670
4671 static int qlt_handle_login(struct scsi_qla_host *vha,
4672     struct imm_ntfy_from_isp *iocb)
4673 {
4674         struct fc_port *sess = NULL, *conflict_sess = NULL;
4675         uint64_t wwn;
4676         port_id_t port_id;
4677         uint16_t loop_id, wd3_lo;
4678         int res = 0;
4679         struct qlt_plogi_ack_t *pla;
4680         unsigned long flags;
4681
4682         lockdep_assert_held(&vha->hw->hardware_lock);
4683
4684         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4685
4686         port_id.b.domain = iocb->u.isp24.port_id[2];
4687         port_id.b.area   = iocb->u.isp24.port_id[1];
4688         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4689         port_id.b.rsvd_1 = 0;
4690
4691         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4692
4693         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4694         abort_cmds_for_s_id(vha, &port_id);
4695
4696         if (wwn) {
4697                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4698                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4699                     port_id, loop_id, &conflict_sess);
4700                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4701         } else {
4702                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4703                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4704                     __func__, __LINE__, loop_id, port_id.b24);
4705                 qlt_send_term_imm_notif(vha, iocb, 1);
4706                 goto out;
4707         }
4708
4709         if (IS_SW_RESV_ADDR(port_id)) {
4710                 res = 1;
4711                 goto out;
4712         }
4713
4714         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4715         if (!pla) {
4716                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4717                     "%s %d %8phC Term INOT due to mem alloc fail",
4718                     __func__, __LINE__,
4719                     iocb->u.isp24.port_name);
4720                 qlt_send_term_imm_notif(vha, iocb, 1);
4721                 goto out;
4722         }
4723
4724         if (conflict_sess) {
4725                 conflict_sess->login_gen++;
4726                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4727                     QLT_PLOGI_LINK_CONFLICT);
4728         }
4729
4730         if (!sess) {
4731                 pla->ref_count++;
4732                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4733                     "%s %d %8phC post new sess\n",
4734                     __func__, __LINE__, iocb->u.isp24.port_name);
4735                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4736                         qla24xx_post_newsess_work(vha, &port_id,
4737                             iocb->u.isp24.port_name,
4738                             iocb->u.isp24.u.plogi.node_name,
4739                             pla, FC4_TYPE_UNKNOWN);
4740                 else
4741                         qla24xx_post_newsess_work(vha, &port_id,
4742                             iocb->u.isp24.port_name, NULL,
4743                             pla, FC4_TYPE_UNKNOWN);
4744
4745                 goto out;
4746         }
4747
4748         if (sess->disc_state == DSC_UPD_FCPORT) {
4749                 u16 sec;
4750
4751                 /*
4752                  * Remote port registration is still going on from
4753                  * previous login. Allow it to finish before we
4754                  * accept the new login.
4755                  */
4756                 sess->next_disc_state = DSC_DELETE_PEND;
4757                 sec = jiffies_to_msecs(jiffies -
4758                     sess->jiffies_at_registration) / 1000;
4759                 if (sess->sec_since_registration < sec && sec &&
4760                     !(sec % 5)) {
4761                         sess->sec_since_registration = sec;
4762                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4763                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4764                             __func__, sess->port_name, sec);
4765                 }
4766
4767                 if (!conflict_sess) {
4768                         list_del(&pla->list);
4769                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4770                 }
4771
4772                 qlt_send_term_imm_notif(vha, iocb, 1);
4773                 goto out;
4774         }
4775
4776         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4777         sess->d_id = port_id;
4778         sess->login_gen++;
4779
4780         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4781                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4782                 sess->local = 0;
4783                 sess->loop_id = loop_id;
4784                 sess->d_id = port_id;
4785                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4786                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4787
4788                 if (wd3_lo & BIT_7)
4789                         sess->conf_compl_supported = 1;
4790
4791                 if ((wd3_lo & BIT_4) == 0)
4792                         sess->port_type = FCT_INITIATOR;
4793                 else
4794                         sess->port_type = FCT_TARGET;
4795
4796         } else
4797                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4798
4799
4800         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4801             "%s %d %8phC  DS %d\n",
4802             __func__, __LINE__, sess->port_name, sess->disc_state);
4803
4804         switch (sess->disc_state) {
4805         case DSC_DELETED:
4806                 qlt_plogi_ack_unref(vha, pla);
4807                 break;
4808
4809         default:
4810                 /*
4811                  * Under normal circumstances we want to release nport handle
4812                  * during LOGO process to avoid nport handle leaks inside FW.
4813                  * The exception is when LOGO is done while another PLOGI with
4814                  * the same nport handle is waiting as might be the case here.
4815                  * Note: there is always a possibily of a race where session
4816                  * deletion has already started for other reasons (e.g. ACL
4817                  * removal) and now PLOGI arrives:
4818                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4819                  *    FW must have assigned this PLOGI a new/same handle and we
4820                  *    can proceed ACK'ing it as usual when session deletion
4821                  *    completes.
4822                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4823                  *    bit reached it, the handle has now been released. We'll
4824                  *    get an error when we ACK this PLOGI. Nothing will be sent
4825                  *    back to initiator. Initiator should eventually retry
4826                  *    PLOGI and situation will correct itself.
4827                  */
4828                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4829                     (sess->d_id.b24 == port_id.b24));
4830
4831                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4832                     "%s %d %8phC post del sess\n",
4833                     __func__, __LINE__, sess->port_name);
4834
4835
4836                 qlt_schedule_sess_for_deletion(sess);
4837                 break;
4838         }
4839 out:
4840         return res;
4841 }
4842
4843 /*
4844  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4845  */
4846 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4847         struct imm_ntfy_from_isp *iocb)
4848 {
4849         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4850         struct qla_hw_data *ha = vha->hw;
4851         struct fc_port *sess = NULL, *conflict_sess = NULL;
4852         uint64_t wwn;
4853         port_id_t port_id;
4854         uint16_t loop_id;
4855         uint16_t wd3_lo;
4856         int res = 0;
4857         unsigned long flags;
4858
4859         lockdep_assert_held(&ha->hardware_lock);
4860
4861         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4862
4863         port_id.b.domain = iocb->u.isp24.port_id[2];
4864         port_id.b.area   = iocb->u.isp24.port_id[1];
4865         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4866         port_id.b.rsvd_1 = 0;
4867
4868         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4869
4870         ql_dbg(ql_dbg_disc, vha, 0xf026,
4871             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4872             vha->vp_idx, iocb->u.isp24.port_id[2],
4873                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4874                    iocb->u.isp24.status_subcode, loop_id,
4875                 iocb->u.isp24.port_name);
4876
4877         /* res = 1 means ack at the end of thread
4878          * res = 0 means ack async/later.
4879          */
4880         switch (iocb->u.isp24.status_subcode) {
4881         case ELS_PLOGI:
4882                 res = qlt_handle_login(vha, iocb);
4883                 break;
4884
4885         case ELS_PRLI:
4886                 if (N2N_TOPO(ha)) {
4887                         sess = qla2x00_find_fcport_by_wwpn(vha,
4888                             iocb->u.isp24.port_name, 1);
4889
4890                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4891                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4892                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4893                                     __func__, __LINE__,
4894                                     iocb->u.isp24.port_name);
4895                                 qlt_send_term_imm_notif(vha, iocb, 1);
4896                                 break;
4897                         }
4898
4899                         res = qlt_handle_login(vha, iocb);
4900                         break;
4901                 }
4902
4903                 if (IS_SW_RESV_ADDR(port_id)) {
4904                         res = 1;
4905                         break;
4906                 }
4907
4908                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4909
4910                 if (wwn) {
4911                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4912                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4913                                 loop_id, &conflict_sess);
4914                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4915                 }
4916
4917                 if (conflict_sess) {
4918                         switch (conflict_sess->disc_state) {
4919                         case DSC_DELETED:
4920                         case DSC_DELETE_PEND:
4921                                 break;
4922                         default:
4923                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4924                                     "PRLI with conflicting sess %p port %8phC\n",
4925                                     conflict_sess, conflict_sess->port_name);
4926                                 conflict_sess->fw_login_state =
4927                                     DSC_LS_PORT_UNAVAIL;
4928                                 qlt_send_term_imm_notif(vha, iocb, 1);
4929                                 res = 0;
4930                                 break;
4931                         }
4932                 }
4933
4934                 if (sess != NULL) {
4935                         bool delete = false;
4936                         int sec;
4937
4938                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4939                         switch (sess->fw_login_state) {
4940                         case DSC_LS_PLOGI_PEND:
4941                         case DSC_LS_PLOGI_COMP:
4942                         case DSC_LS_PRLI_COMP:
4943                                 break;
4944                         default:
4945                                 delete = true;
4946                                 break;
4947                         }
4948
4949                         switch (sess->disc_state) {
4950                         case DSC_UPD_FCPORT:
4951                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4952                                     flags);
4953
4954                                 sec = jiffies_to_msecs(jiffies -
4955                                     sess->jiffies_at_registration)/1000;
4956                                 if (sess->sec_since_registration < sec && sec &&
4957                                     !(sec % 5)) {
4958                                         sess->sec_since_registration = sec;
4959                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4960                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4961                                             __func__, sess->port_name, sec);
4962                                 }
4963                                 qlt_send_term_imm_notif(vha, iocb, 1);
4964                                 return 0;
4965
4966                         case DSC_LOGIN_PEND:
4967                         case DSC_GPDB:
4968                         case DSC_LOGIN_COMPLETE:
4969                         case DSC_ADISC:
4970                                 delete = false;
4971                                 break;
4972                         default:
4973                                 break;
4974                         }
4975
4976                         if (delete) {
4977                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4978                                     flags);
4979                                 /*
4980                                  * Impatient initiator sent PRLI before last
4981                                  * PLOGI could finish. Will force him to re-try,
4982                                  * while last one finishes.
4983                                  */
4984                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4985                                     "sess %p PRLI received, before plogi ack.\n",
4986                                     sess);
4987                                 qlt_send_term_imm_notif(vha, iocb, 1);
4988                                 res = 0;
4989                                 break;
4990                         }
4991
4992                         /*
4993                          * This shouldn't happen under normal circumstances,
4994                          * since we have deleted the old session during PLOGI
4995                          */
4996                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4997                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4998                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4999
5000                         sess->local = 0;
5001                         sess->loop_id = loop_id;
5002                         sess->d_id = port_id;
5003                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5004
5005                         if (wd3_lo & BIT_7)
5006                                 sess->conf_compl_supported = 1;
5007
5008                         if ((wd3_lo & BIT_4) == 0)
5009                                 sess->port_type = FCT_INITIATOR;
5010                         else
5011                                 sess->port_type = FCT_TARGET;
5012
5013                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5014                 }
5015                 res = 1; /* send notify ack */
5016
5017                 /* Make session global (not used in fabric mode) */
5018                 if (ha->current_topology != ISP_CFG_F) {
5019                         if (sess) {
5020                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5021                                     "%s %d %8phC post nack\n",
5022                                     __func__, __LINE__, sess->port_name);
5023                                 qla24xx_post_nack_work(vha, sess, iocb,
5024                                         SRB_NACK_PRLI);
5025                                 res = 0;
5026                         } else {
5027                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5028                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5029                                 qla2xxx_wake_dpc(vha);
5030                         }
5031                 } else {
5032                         if (sess) {
5033                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5034                                     "%s %d %8phC post nack\n",
5035                                     __func__, __LINE__, sess->port_name);
5036                                 qla24xx_post_nack_work(vha, sess, iocb,
5037                                         SRB_NACK_PRLI);
5038                                 res = 0;
5039                         }
5040                 }
5041                 break;
5042
5043         case ELS_TPRLO:
5044                 if (le16_to_cpu(iocb->u.isp24.flags) &
5045                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5046                         loop_id = 0xFFFF;
5047                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5048                         res = 1;
5049                         break;
5050                 }
5051                 /* fall through */
5052         case ELS_LOGO:
5053         case ELS_PRLO:
5054                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5055                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5056                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5057
5058                 if (sess) {
5059                         sess->login_gen++;
5060                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5061                         sess->logo_ack_needed = 1;
5062                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5063                 }
5064
5065                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5066
5067                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5068                     "%s: logo %llx res %d sess %p ",
5069                     __func__, wwn, res, sess);
5070                 if (res == 0) {
5071                         /*
5072                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5073                          * for LOGO_ACK & sess delete
5074                          */
5075                         BUG_ON(!sess);
5076                         res = 0;
5077                 } else {
5078                         /* cmd did not go to upper layer. */
5079                         if (sess) {
5080                                 qlt_schedule_sess_for_deletion(sess);
5081                                 res = 0;
5082                         }
5083                         /* else logo will be ack */
5084                 }
5085                 break;
5086         case ELS_PDISC:
5087         case ELS_ADISC:
5088         {
5089                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5090
5091                 if (tgt->link_reinit_iocb_pending) {
5092                         qlt_send_notify_ack(ha->base_qpair,
5093                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5094                         tgt->link_reinit_iocb_pending = 0;
5095                 }
5096
5097                 sess = qla2x00_find_fcport_by_wwpn(vha,
5098                     iocb->u.isp24.port_name, 1);
5099                 if (sess) {
5100                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5101                                 "sess %p lid %d|%d DS %d LS %d\n",
5102                                 sess, sess->loop_id, loop_id,
5103                                 sess->disc_state, sess->fw_login_state);
5104                 }
5105
5106                 res = 1; /* send notify ack */
5107                 break;
5108         }
5109
5110         case ELS_FLOGI: /* should never happen */
5111         default:
5112                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5113                     "qla_target(%d): Unsupported ELS command %x "
5114                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5115                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5116                 break;
5117         }
5118
5119         ql_dbg(ql_dbg_disc, vha, 0xf026,
5120             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5121             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5122
5123         return res;
5124 }
5125
5126 /*
5127  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5128  */
5129 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5130         struct imm_ntfy_from_isp *iocb)
5131 {
5132         struct qla_hw_data *ha = vha->hw;
5133         uint32_t add_flags = 0;
5134         int send_notify_ack = 1;
5135         uint16_t status;
5136
5137         lockdep_assert_held(&ha->hardware_lock);
5138
5139         status = le16_to_cpu(iocb->u.isp2x.status);
5140         switch (status) {
5141         case IMM_NTFY_LIP_RESET:
5142         {
5143                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5144                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5145                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5146                     iocb->u.isp24.status_subcode);
5147
5148                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5149                         send_notify_ack = 0;
5150                 break;
5151         }
5152
5153         case IMM_NTFY_LIP_LINK_REINIT:
5154         {
5155                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5156
5157                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5158                     "qla_target(%d): LINK REINIT (loop %#x, "
5159                     "subcode %x)\n", vha->vp_idx,
5160                     le16_to_cpu(iocb->u.isp24.nport_handle),
5161                     iocb->u.isp24.status_subcode);
5162                 if (tgt->link_reinit_iocb_pending) {
5163                         qlt_send_notify_ack(ha->base_qpair,
5164                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5165                 }
5166                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5167                 tgt->link_reinit_iocb_pending = 1;
5168                 /*
5169                  * QLogic requires to wait after LINK REINIT for possible
5170                  * PDISC or ADISC ELS commands
5171                  */
5172                 send_notify_ack = 0;
5173                 break;
5174         }
5175
5176         case IMM_NTFY_PORT_LOGOUT:
5177                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5178                     "qla_target(%d): Port logout (loop "
5179                     "%#x, subcode %x)\n", vha->vp_idx,
5180                     le16_to_cpu(iocb->u.isp24.nport_handle),
5181                     iocb->u.isp24.status_subcode);
5182
5183                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5184                         send_notify_ack = 0;
5185                 /* The sessions will be cleared in the callback, if needed */
5186                 break;
5187
5188         case IMM_NTFY_GLBL_TPRLO:
5189                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5190                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5191                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5192                         send_notify_ack = 0;
5193                 /* The sessions will be cleared in the callback, if needed */
5194                 break;
5195
5196         case IMM_NTFY_PORT_CONFIG:
5197                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5198                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5199                     status);
5200                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5201                         send_notify_ack = 0;
5202                 /* The sessions will be cleared in the callback, if needed */
5203                 break;
5204
5205         case IMM_NTFY_GLBL_LOGO:
5206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5207                     "qla_target(%d): Link failure detected\n",
5208                     vha->vp_idx);
5209                 /* I_T nexus loss */
5210                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5211                         send_notify_ack = 0;
5212                 break;
5213
5214         case IMM_NTFY_IOCB_OVERFLOW:
5215                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5216                     "qla_target(%d): Cannot provide requested "
5217                     "capability (IOCB overflowed the immediate notify "
5218                     "resource count)\n", vha->vp_idx);
5219                 break;
5220
5221         case IMM_NTFY_ABORT_TASK:
5222                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5223                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5224                     "L %#x)\n", vha->vp_idx,
5225                     le16_to_cpu(iocb->u.isp2x.seq_id),
5226                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5227                     le16_to_cpu(iocb->u.isp2x.lun));
5228                 if (qlt_abort_task(vha, iocb) == 0)
5229                         send_notify_ack = 0;
5230                 break;
5231
5232         case IMM_NTFY_RESOURCE:
5233                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5234                     "qla_target(%d): Out of resources, host %ld\n",
5235                     vha->vp_idx, vha->host_no);
5236                 break;
5237
5238         case IMM_NTFY_MSG_RX:
5239                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5240                     "qla_target(%d): Immediate notify task %x\n",
5241                     vha->vp_idx, iocb->u.isp2x.task_flags);
5242                 break;
5243
5244         case IMM_NTFY_ELS:
5245                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5246                         send_notify_ack = 0;
5247                 break;
5248         default:
5249                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5250                     "qla_target(%d): Received unknown immediate "
5251                     "notify status %x\n", vha->vp_idx, status);
5252                 break;
5253         }
5254
5255         if (send_notify_ack)
5256                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5257                     0, 0);
5258 }
5259
5260 /*
5261  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5262  * This function sends busy to ISP 2xxx or 24xx.
5263  */
5264 static int __qlt_send_busy(struct qla_qpair *qpair,
5265         struct atio_from_isp *atio, uint16_t status)
5266 {
5267         struct scsi_qla_host *vha = qpair->vha;
5268         struct ctio7_to_24xx *ctio24;
5269         struct qla_hw_data *ha = vha->hw;
5270         request_t *pkt;
5271         struct fc_port *sess = NULL;
5272         unsigned long flags;
5273         u16 temp;
5274         port_id_t id;
5275
5276         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5277
5278         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5279         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5280         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5281         if (!sess) {
5282                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5283                 return 0;
5284         }
5285         /* Sending marker isn't necessary, since we called from ISR */
5286
5287         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5288         if (!pkt) {
5289                 ql_dbg(ql_dbg_io, vha, 0x3063,
5290                     "qla_target(%d): %s failed: unable to allocate "
5291                     "request packet", vha->vp_idx, __func__);
5292                 return -ENOMEM;
5293         }
5294
5295         qpair->tgt_counters.num_q_full_sent++;
5296         pkt->entry_count = 1;
5297         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5298
5299         ctio24 = (struct ctio7_to_24xx *)pkt;
5300         ctio24->entry_type = CTIO_TYPE7;
5301         ctio24->nport_handle = sess->loop_id;
5302         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5303         ctio24->vp_index = vha->vp_idx;
5304         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5305         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5306         temp = (atio->u.isp24.attr << 9) |
5307                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5308                 CTIO7_FLAGS_DONT_RET_CTIO;
5309         ctio24->u.status1.flags = cpu_to_le16(temp);
5310         /*
5311          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5312          * if the explicit conformation is used.
5313          */
5314         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5315         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5316
5317         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5318
5319         if (ctio24->u.status1.residual != 0)
5320                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5321
5322         /* Memory Barrier */
5323         wmb();
5324         if (qpair->reqq_start_iocbs)
5325                 qpair->reqq_start_iocbs(qpair);
5326         else
5327                 qla2x00_start_iocbs(vha, qpair->req);
5328         return 0;
5329 }
5330
5331 /*
5332  * This routine is used to allocate a command for either a QFull condition
5333  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5334  * out previously.
5335  */
5336 static void
5337 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5338         struct atio_from_isp *atio, uint16_t status, int qfull)
5339 {
5340         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5341         struct qla_hw_data *ha = vha->hw;
5342         struct fc_port *sess;
5343         struct se_session *se_sess;
5344         struct qla_tgt_cmd *cmd;
5345         int tag, cpu;
5346         unsigned long flags;
5347
5348         if (unlikely(tgt->tgt_stop)) {
5349                 ql_dbg(ql_dbg_io, vha, 0x300a,
5350                         "New command while device %p is shutting down\n", tgt);
5351                 return;
5352         }
5353
5354         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5355                 vha->hw->tgt.num_qfull_cmds_dropped++;
5356                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5357                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5358                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5359                                 vha->hw->tgt.num_qfull_cmds_dropped;
5360
5361                 ql_dbg(ql_dbg_io, vha, 0x3068,
5362                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5363                         vha->vp_idx, __func__,
5364                         vha->hw->tgt.num_qfull_cmds_dropped);
5365
5366                 qlt_chk_exch_leak_thresh_hold(vha);
5367                 return;
5368         }
5369
5370         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5371                 (vha, atio->u.isp24.fcp_hdr.s_id);
5372         if (!sess)
5373                 return;
5374
5375         se_sess = sess->se_sess;
5376
5377         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5378         if (tag < 0) {
5379                 ql_dbg(ql_dbg_io, vha, 0x3009,
5380                         "qla_target(%d): %s: Allocation of cmd failed\n",
5381                         vha->vp_idx, __func__);
5382
5383                 vha->hw->tgt.num_qfull_cmds_dropped++;
5384                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5385                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5386                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5387                                 vha->hw->tgt.num_qfull_cmds_dropped;
5388
5389                 qlt_chk_exch_leak_thresh_hold(vha);
5390                 return;
5391         }
5392
5393         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5394         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5395
5396         qlt_incr_num_pend_cmds(vha);
5397         INIT_LIST_HEAD(&cmd->cmd_list);
5398         memcpy(&cmd->atio, atio, sizeof(*atio));
5399
5400         cmd->tgt = vha->vha_tgt.qla_tgt;
5401         cmd->vha = vha;
5402         cmd->reset_count = ha->base_qpair->chip_reset;
5403         cmd->q_full = 1;
5404         cmd->qpair = ha->base_qpair;
5405         cmd->se_cmd.map_cpu = cpu;
5406
5407         if (qfull) {
5408                 cmd->q_full = 1;
5409                 /* NOTE: borrowing the state field to carry the status */
5410                 cmd->state = status;
5411         } else
5412                 cmd->term_exchg = 1;
5413
5414         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5415         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5416
5417         vha->hw->tgt.num_qfull_cmds_alloc++;
5418         if (vha->hw->tgt.num_qfull_cmds_alloc >
5419                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5420                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5421                         vha->hw->tgt.num_qfull_cmds_alloc;
5422         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5423 }
5424
5425 int
5426 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5427 {
5428         struct scsi_qla_host *vha = qpair->vha;
5429         struct qla_hw_data *ha = vha->hw;
5430         unsigned long flags;
5431         struct qla_tgt_cmd *cmd, *tcmd;
5432         struct list_head free_list, q_full_list;
5433         int rc = 0;
5434
5435         if (list_empty(&ha->tgt.q_full_list))
5436                 return 0;
5437
5438         INIT_LIST_HEAD(&free_list);
5439         INIT_LIST_HEAD(&q_full_list);
5440
5441         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5442         if (list_empty(&ha->tgt.q_full_list)) {
5443                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5444                 return 0;
5445         }
5446
5447         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5448         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5449
5450         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5451         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5452                 if (cmd->q_full)
5453                         /* cmd->state is a borrowed field to hold status */
5454                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5455                 else if (cmd->term_exchg)
5456                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5457
5458                 if (rc == -ENOMEM)
5459                         break;
5460
5461                 if (cmd->q_full)
5462                         ql_dbg(ql_dbg_io, vha, 0x3006,
5463                             "%s: busy sent for ox_id[%04x]\n", __func__,
5464                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5465                 else if (cmd->term_exchg)
5466                         ql_dbg(ql_dbg_io, vha, 0x3007,
5467                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5468                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5469                 else
5470                         ql_dbg(ql_dbg_io, vha, 0x3008,
5471                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5472                             cmd);
5473
5474                 list_del(&cmd->cmd_list);
5475                 list_add_tail(&cmd->cmd_list, &free_list);
5476
5477                 /* piggy back on hardware_lock for protection */
5478                 vha->hw->tgt.num_qfull_cmds_alloc--;
5479         }
5480         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5481
5482         cmd = NULL;
5483
5484         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5485                 list_del(&cmd->cmd_list);
5486                 /* This cmd was never sent to TCM.  There is no need
5487                  * to schedule free or call free_cmd
5488                  */
5489                 qlt_free_cmd(cmd);
5490         }
5491
5492         if (!list_empty(&q_full_list)) {
5493                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5494                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5495                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5496         }
5497
5498         return rc;
5499 }
5500
5501 static void
5502 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5503     uint16_t status)
5504 {
5505         int rc = 0;
5506         struct scsi_qla_host *vha = qpair->vha;
5507
5508         rc = __qlt_send_busy(qpair, atio, status);
5509         if (rc == -ENOMEM)
5510                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5511 }
5512
5513 static int
5514 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5515         struct atio_from_isp *atio, uint8_t ha_locked)
5516 {
5517         struct qla_hw_data *ha = vha->hw;
5518         unsigned long flags;
5519
5520         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5521                 return 0;
5522
5523         if (!ha_locked)
5524                 spin_lock_irqsave(&ha->hardware_lock, flags);
5525         qlt_send_busy(qpair, atio, qla_sam_status);
5526         if (!ha_locked)
5527                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5528
5529         return 1;
5530 }
5531
5532 /* ha->hardware_lock supposed to be held on entry */
5533 /* called via callback from qla2xxx */
5534 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5535         struct atio_from_isp *atio, uint8_t ha_locked)
5536 {
5537         struct qla_hw_data *ha = vha->hw;
5538         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5539         int rc;
5540         unsigned long flags = 0;
5541
5542         if (unlikely(tgt == NULL)) {
5543                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5544                     "ATIO pkt, but no tgt (ha %p)", ha);
5545                 return;
5546         }
5547         /*
5548          * In tgt_stop mode we also should allow all requests to pass.
5549          * Otherwise, some commands can stuck.
5550          */
5551
5552         tgt->atio_irq_cmd_count++;
5553
5554         switch (atio->u.raw.entry_type) {
5555         case ATIO_TYPE7:
5556                 if (unlikely(atio->u.isp24.exchange_addr ==
5557                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5558                         ql_dbg(ql_dbg_io, vha, 0x3065,
5559                             "qla_target(%d): ATIO_TYPE7 "
5560                             "received with UNKNOWN exchange address, "
5561                             "sending QUEUE_FULL\n", vha->vp_idx);
5562                         if (!ha_locked)
5563                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5564                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5565                         if (!ha_locked)
5566                                 spin_unlock_irqrestore(&ha->hardware_lock,
5567                                     flags);
5568                         break;
5569                 }
5570
5571                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5572                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5573                             atio, ha_locked);
5574                         if (rc != 0) {
5575                                 tgt->atio_irq_cmd_count--;
5576                                 return;
5577                         }
5578                         rc = qlt_handle_cmd_for_atio(vha, atio);
5579                 } else {
5580                         rc = qlt_handle_task_mgmt(vha, atio);
5581                 }
5582                 if (unlikely(rc != 0)) {
5583                         if (!ha_locked)
5584                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5585                         switch (rc) {
5586                         case -ENODEV:
5587                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5588                                     "qla_target: Unable to send command to target\n");
5589                                 break;
5590                         case -EBADF:
5591                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5592                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5593                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5594                                     atio, 1, 0);
5595                                 break;
5596                         case -EBUSY:
5597                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5598                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5599                                     vha->vp_idx);
5600                                 qlt_send_busy(ha->base_qpair, atio,
5601                                     tc_sam_status);
5602                                 break;
5603                         default:
5604                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5605                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5606                                     vha->vp_idx);
5607                                 qlt_send_busy(ha->base_qpair, atio,
5608                                     qla_sam_status);
5609                                 break;
5610                         }
5611                         if (!ha_locked)
5612                                 spin_unlock_irqrestore(&ha->hardware_lock,
5613                                     flags);
5614                 }
5615                 break;
5616
5617         case IMMED_NOTIFY_TYPE:
5618         {
5619                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5620                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5621                             "qla_target(%d): Received ATIO packet %x "
5622                             "with error status %x\n", vha->vp_idx,
5623                             atio->u.raw.entry_type,
5624                             atio->u.isp2x.entry_status);
5625                         break;
5626                 }
5627                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5628
5629                 if (!ha_locked)
5630                         spin_lock_irqsave(&ha->hardware_lock, flags);
5631                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5632                 if (!ha_locked)
5633                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5634                 break;
5635         }
5636
5637         default:
5638                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5639                     "qla_target(%d): Received unknown ATIO atio "
5640                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5641                 break;
5642         }
5643
5644         tgt->atio_irq_cmd_count--;
5645 }
5646
5647 /*
5648  * qpair lock is assume to be held
5649  * rc = 0 : send terminate & abts respond
5650  * rc != 0: do not send term & abts respond
5651  */
5652 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5653     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5654 {
5655         struct qla_hw_data *ha = vha->hw;
5656         int rc = 0;
5657
5658         /*
5659          * Detect unresolved exchange. If the same ABTS is unable
5660          * to terminate an existing command and the same ABTS loops
5661          * between FW & Driver, then force FW dump. Under 1 jiff,
5662          * we should see multiple loops.
5663          */
5664         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5665             qpair->retry_term_jiff == jiffies) {
5666                 /* found existing exchange */
5667                 qpair->retry_term_cnt++;
5668                 if (qpair->retry_term_cnt >= 5) {
5669                         rc = EIO;
5670                         qpair->retry_term_cnt = 0;
5671                         ql_log(ql_log_warn, vha, 0xffff,
5672                             "Unable to send ABTS Respond. Dumping firmware.\n");
5673                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5674                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5675
5676                         if (qpair == ha->base_qpair)
5677                                 ha->isp_ops->fw_dump(vha, 1);
5678                         else
5679                                 ha->isp_ops->fw_dump(vha, 0);
5680
5681                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5682                         qla2xxx_wake_dpc(vha);
5683                 }
5684         } else if (qpair->retry_term_jiff != jiffies) {
5685                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5686                 qpair->retry_term_cnt = 0;
5687                 qpair->retry_term_jiff = jiffies;
5688         }
5689
5690         return rc;
5691 }
5692
5693
5694 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5695         struct rsp_que *rsp, response_t *pkt)
5696 {
5697         struct abts_resp_from_24xx_fw *entry =
5698                 (struct abts_resp_from_24xx_fw *)pkt;
5699         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5700         struct qla_tgt_mgmt_cmd *mcmd;
5701         struct qla_hw_data *ha = vha->hw;
5702
5703         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5704         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5705                 ql_dbg(ql_dbg_async, vha, 0xe064,
5706                     "qla_target(%d): ABTS Comp without mcmd\n",
5707                     vha->vp_idx);
5708                 return;
5709         }
5710
5711         if (mcmd)
5712                 vha  = mcmd->vha;
5713         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5714
5715         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5716             "ABTS_RESP_24XX: compl_status %x\n",
5717             entry->compl_status);
5718
5719         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5720                 if ((entry->error_subcode1 == 0x1E) &&
5721                     (entry->error_subcode2 == 0)) {
5722                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5723                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5724                                 return;
5725                         }
5726                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5727                             pkt, mcmd);
5728                 } else {
5729                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5730                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5731                             vha->vp_idx, entry->compl_status,
5732                             entry->error_subcode1,
5733                             entry->error_subcode2);
5734                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5735                 }
5736         } else {
5737                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5738         }
5739 }
5740
5741 /* ha->hardware_lock supposed to be held on entry */
5742 /* called via callback from qla2xxx */
5743 static void qlt_response_pkt(struct scsi_qla_host *vha,
5744         struct rsp_que *rsp, response_t *pkt)
5745 {
5746         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5747
5748         if (unlikely(tgt == NULL)) {
5749                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5750                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5751                     vha->vp_idx, pkt->entry_type, vha->hw);
5752                 return;
5753         }
5754
5755         /*
5756          * In tgt_stop mode we also should allow all requests to pass.
5757          * Otherwise, some commands can stuck.
5758          */
5759
5760         switch (pkt->entry_type) {
5761         case CTIO_CRC2:
5762         case CTIO_TYPE7:
5763         {
5764                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5765
5766                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5767                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5768                     entry);
5769                 break;
5770         }
5771
5772         case ACCEPT_TGT_IO_TYPE:
5773         {
5774                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5775                 int rc;
5776
5777                 if (atio->u.isp2x.status !=
5778                     cpu_to_le16(ATIO_CDB_VALID)) {
5779                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5780                             "qla_target(%d): ATIO with error "
5781                             "status %x received\n", vha->vp_idx,
5782                             le16_to_cpu(atio->u.isp2x.status));
5783                         break;
5784                 }
5785
5786                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5787                 if (rc != 0)
5788                         return;
5789
5790                 rc = qlt_handle_cmd_for_atio(vha, atio);
5791                 if (unlikely(rc != 0)) {
5792                         switch (rc) {
5793                         case -ENODEV:
5794                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5795                                     "qla_target: Unable to send command to target\n");
5796                                 break;
5797                         case -EBADF:
5798                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5799                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5800                                 qlt_send_term_exchange(rsp->qpair, NULL,
5801                                     atio, 1, 0);
5802                                 break;
5803                         case -EBUSY:
5804                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5805                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5806                                     vha->vp_idx);
5807                                 qlt_send_busy(rsp->qpair, atio,
5808                                     tc_sam_status);
5809                                 break;
5810                         default:
5811                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5812                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5813                                     vha->vp_idx);
5814                                 qlt_send_busy(rsp->qpair, atio,
5815                                     qla_sam_status);
5816                                 break;
5817                         }
5818                 }
5819         }
5820         break;
5821
5822         case CONTINUE_TGT_IO_TYPE:
5823         {
5824                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5825
5826                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5827                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5828                     entry);
5829                 break;
5830         }
5831
5832         case CTIO_A64_TYPE:
5833         {
5834                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5835
5836                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5837                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5838                     entry);
5839                 break;
5840         }
5841
5842         case IMMED_NOTIFY_TYPE:
5843                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5844                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5845                 break;
5846
5847         case NOTIFY_ACK_TYPE:
5848                 if (tgt->notify_ack_expected > 0) {
5849                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5850
5851                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5852                             "NOTIFY_ACK seq %08x status %x\n",
5853                             le16_to_cpu(entry->u.isp2x.seq_id),
5854                             le16_to_cpu(entry->u.isp2x.status));
5855                         tgt->notify_ack_expected--;
5856                         if (entry->u.isp2x.status !=
5857                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5858                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5859                                     "qla_target(%d): NOTIFY_ACK "
5860                                     "failed %x\n", vha->vp_idx,
5861                                     le16_to_cpu(entry->u.isp2x.status));
5862                         }
5863                 } else {
5864                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5865                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5866                             vha->vp_idx);
5867                 }
5868                 break;
5869
5870         case ABTS_RECV_24XX:
5871                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5872                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5873                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5874                 break;
5875
5876         case ABTS_RESP_24XX:
5877                 if (tgt->abts_resp_expected > 0) {
5878                         qlt_handle_abts_completion(vha, rsp, pkt);
5879                 } else {
5880                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5881                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5882                             "received\n", vha->vp_idx);
5883                 }
5884                 break;
5885
5886         default:
5887                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5888                     "qla_target(%d): Received unknown response pkt "
5889                     "type %x\n", vha->vp_idx, pkt->entry_type);
5890                 break;
5891         }
5892
5893 }
5894
5895 /*
5896  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5897  */
5898 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5899         uint16_t *mailbox)
5900 {
5901         struct qla_hw_data *ha = vha->hw;
5902         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5903         int login_code;
5904
5905         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5906                 return;
5907
5908         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5909             IS_QLA2100(ha))
5910                 return;
5911         /*
5912          * In tgt_stop mode we also should allow all requests to pass.
5913          * Otherwise, some commands can stuck.
5914          */
5915
5916
5917         switch (code) {
5918         case MBA_RESET:                 /* Reset */
5919         case MBA_SYSTEM_ERR:            /* System Error */
5920         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5921         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5923                     "qla_target(%d): System error async event %#x "
5924                     "occurred", vha->vp_idx, code);
5925                 break;
5926         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5927                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5928                 break;
5929
5930         case MBA_LOOP_UP:
5931         {
5932                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5933                     "qla_target(%d): Async LOOP_UP occurred "
5934                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5935                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5936                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5937                 if (tgt->link_reinit_iocb_pending) {
5938                         qlt_send_notify_ack(ha->base_qpair,
5939                             (void *)&tgt->link_reinit_iocb,
5940                             0, 0, 0, 0, 0, 0);
5941                         tgt->link_reinit_iocb_pending = 0;
5942                 }
5943                 break;
5944         }
5945
5946         case MBA_LIP_OCCURRED:
5947         case MBA_LOOP_DOWN:
5948         case MBA_LIP_RESET:
5949         case MBA_RSCN_UPDATE:
5950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5951                     "qla_target(%d): Async event %#x occurred "
5952                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5953                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5954                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5955                 break;
5956
5957         case MBA_REJECTED_FCP_CMD:
5958                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5959                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5960                     vha->vp_idx,
5961                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5962                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5963
5964                 if (le16_to_cpu(mailbox[3]) == 1) {
5965                         /* exchange starvation. */
5966                         vha->hw->exch_starvation++;
5967                         if (vha->hw->exch_starvation > 5) {
5968                                 ql_log(ql_log_warn, vha, 0xd03a,
5969                                     "Exchange starvation-. Resetting RISC\n");
5970
5971                                 vha->hw->exch_starvation = 0;
5972                                 if (IS_P3P_TYPE(vha->hw))
5973                                         set_bit(FCOE_CTX_RESET_NEEDED,
5974                                             &vha->dpc_flags);
5975                                 else
5976                                         set_bit(ISP_ABORT_NEEDED,
5977                                             &vha->dpc_flags);
5978                                 qla2xxx_wake_dpc(vha);
5979                         }
5980                 }
5981                 break;
5982
5983         case MBA_PORT_UPDATE:
5984                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5985                     "qla_target(%d): Port update async event %#x "
5986                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5987                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5988                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5989                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5990
5991                 login_code = le16_to_cpu(mailbox[2]);
5992                 if (login_code == 0x4) {
5993                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5994                             "Async MB 2: Got PLOGI Complete\n");
5995                         vha->hw->exch_starvation = 0;
5996                 } else if (login_code == 0x7)
5997                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5998                             "Async MB 2: Port Logged Out\n");
5999                 break;
6000         default:
6001                 break;
6002         }
6003
6004 }
6005
6006 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6007         uint16_t loop_id)
6008 {
6009         fc_port_t *fcport, *tfcp, *del;
6010         int rc;
6011         unsigned long flags;
6012         u8 newfcport = 0;
6013
6014         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6015         if (!fcport) {
6016                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6017                     "qla_target(%d): Allocation of tmp FC port failed",
6018                     vha->vp_idx);
6019                 return NULL;
6020         }
6021
6022         fcport->loop_id = loop_id;
6023
6024         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6025         if (rc != QLA_SUCCESS) {
6026                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6027                     "qla_target(%d): Failed to retrieve fcport "
6028                     "information -- get_port_database() returned %x "
6029                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6030                 kfree(fcport);
6031                 return NULL;
6032         }
6033
6034         del = NULL;
6035         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6036         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6037
6038         if (tfcp) {
6039                 tfcp->d_id = fcport->d_id;
6040                 tfcp->port_type = fcport->port_type;
6041                 tfcp->supported_classes = fcport->supported_classes;
6042                 tfcp->flags |= fcport->flags;
6043                 tfcp->scan_state = QLA_FCPORT_FOUND;
6044
6045                 del = fcport;
6046                 fcport = tfcp;
6047         } else {
6048                 if (vha->hw->current_topology == ISP_CFG_F)
6049                         fcport->flags |= FCF_FABRIC_DEVICE;
6050
6051                 list_add_tail(&fcport->list, &vha->vp_fcports);
6052                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6053                    vha->fcport_count++;
6054                 fcport->login_gen++;
6055                 fcport->disc_state = DSC_LOGIN_COMPLETE;
6056                 fcport->login_succ = 1;
6057                 newfcport = 1;
6058         }
6059
6060         fcport->deleted = 0;
6061         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6062
6063         switch (vha->host->active_mode) {
6064         case MODE_INITIATOR:
6065         case MODE_DUAL:
6066                 if (newfcport) {
6067                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6068                                 qla24xx_sched_upd_fcport(fcport);
6069                         } else {
6070                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6071                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6072                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6073                                 qla24xx_post_gpsc_work(vha, fcport);
6074                         }
6075                 }
6076                 break;
6077
6078         case MODE_TARGET:
6079         default:
6080                 break;
6081         }
6082         if (del)
6083                 qla2x00_free_fcport(del);
6084
6085         return fcport;
6086 }
6087
6088 /* Must be called under tgt_mutex */
6089 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6090                                            be_id_t s_id)
6091 {
6092         struct fc_port *sess = NULL;
6093         fc_port_t *fcport = NULL;
6094         int rc, global_resets;
6095         uint16_t loop_id = 0;
6096
6097         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6098                 /*
6099                  * This is Domain Controller, so it should be
6100                  * OK to drop SCSI commands from it.
6101                  */
6102                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6103                     "Unable to find initiator with S_ID %x:%x:%x",
6104                     s_id.domain, s_id.area, s_id.al_pa);
6105                 return NULL;
6106         }
6107
6108         mutex_lock(&vha->vha_tgt.tgt_mutex);
6109
6110 retry:
6111         global_resets =
6112             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6113
6114         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6115         if (rc != 0) {
6116                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6117
6118                 ql_log(ql_log_info, vha, 0xf071,
6119                     "qla_target(%d): Unable to find "
6120                     "initiator with S_ID %x:%x:%x",
6121                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6122
6123                 if (rc == -ENOENT) {
6124                         qlt_port_logo_t logo;
6125
6126                         logo.id = be_to_port_id(s_id);
6127                         logo.cmd_count = 1;
6128                         qlt_send_first_logo(vha, &logo);
6129                 }
6130
6131                 return NULL;
6132         }
6133
6134         fcport = qlt_get_port_database(vha, loop_id);
6135         if (!fcport) {
6136                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6137                 return NULL;
6138         }
6139
6140         if (global_resets !=
6141             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6143                     "qla_target(%d): global reset during session discovery "
6144                     "(counter was %d, new %d), retrying", vha->vp_idx,
6145                     global_resets,
6146                     atomic_read(&vha->vha_tgt.
6147                         qla_tgt->tgt_global_resets_count));
6148                 goto retry;
6149         }
6150
6151         sess = qlt_create_sess(vha, fcport, true);
6152
6153         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6154
6155         return sess;
6156 }
6157
6158 static void qlt_abort_work(struct qla_tgt *tgt,
6159         struct qla_tgt_sess_work_param *prm)
6160 {
6161         struct scsi_qla_host *vha = tgt->vha;
6162         struct qla_hw_data *ha = vha->hw;
6163         struct fc_port *sess = NULL;
6164         unsigned long flags = 0, flags2 = 0;
6165         be_id_t s_id;
6166         int rc;
6167
6168         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6169
6170         if (tgt->tgt_stop)
6171                 goto out_term2;
6172
6173         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6174
6175         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6176         if (!sess) {
6177                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6178
6179                 sess = qlt_make_local_sess(vha, s_id);
6180                 /* sess has got an extra creation ref */
6181
6182                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6183                 if (!sess)
6184                         goto out_term2;
6185         } else {
6186                 if (sess->deleted) {
6187                         sess = NULL;
6188                         goto out_term2;
6189                 }
6190
6191                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6192                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6193                             "%s: kref_get fail %8phC \n",
6194                              __func__, sess->port_name);
6195                         sess = NULL;
6196                         goto out_term2;
6197                 }
6198         }
6199
6200         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6201         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6202
6203         ha->tgt.tgt_ops->put_sess(sess);
6204
6205         if (rc != 0)
6206                 goto out_term;
6207         return;
6208
6209 out_term2:
6210         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6211
6212 out_term:
6213         spin_lock_irqsave(&ha->hardware_lock, flags);
6214         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6215             FCP_TMF_REJECTED, false);
6216         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6217 }
6218
6219 static void qlt_tmr_work(struct qla_tgt *tgt,
6220         struct qla_tgt_sess_work_param *prm)
6221 {
6222         struct atio_from_isp *a = &prm->tm_iocb2;
6223         struct scsi_qla_host *vha = tgt->vha;
6224         struct qla_hw_data *ha = vha->hw;
6225         struct fc_port *sess;
6226         unsigned long flags;
6227         be_id_t s_id;
6228         int rc;
6229         u64 unpacked_lun;
6230         int fn;
6231         void *iocb;
6232
6233         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6234
6235         if (tgt->tgt_stop)
6236                 goto out_term2;
6237
6238         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6239         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6240         if (!sess) {
6241                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6242
6243                 sess = qlt_make_local_sess(vha, s_id);
6244                 /* sess has got an extra creation ref */
6245
6246                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6247                 if (!sess)
6248                         goto out_term2;
6249         } else {
6250                 if (sess->deleted) {
6251                         goto out_term2;
6252                 }
6253
6254                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6255                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6256                             "%s: kref_get fail %8phC\n",
6257                              __func__, sess->port_name);
6258                         goto out_term2;
6259                 }
6260         }
6261
6262         iocb = a;
6263         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6264         unpacked_lun =
6265             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6266
6267         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6268         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6269
6270         ha->tgt.tgt_ops->put_sess(sess);
6271
6272         if (rc != 0)
6273                 goto out_term;
6274         return;
6275
6276 out_term2:
6277         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6278 out_term:
6279         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6280 }
6281
6282 static void qlt_sess_work_fn(struct work_struct *work)
6283 {
6284         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6285         struct scsi_qla_host *vha = tgt->vha;
6286         unsigned long flags;
6287
6288         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6289
6290         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6291         while (!list_empty(&tgt->sess_works_list)) {
6292                 struct qla_tgt_sess_work_param *prm = list_entry(
6293                     tgt->sess_works_list.next, typeof(*prm),
6294                     sess_works_list_entry);
6295
6296                 /*
6297                  * This work can be scheduled on several CPUs at time, so we
6298                  * must delete the entry to eliminate double processing
6299                  */
6300                 list_del(&prm->sess_works_list_entry);
6301
6302                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6303
6304                 switch (prm->type) {
6305                 case QLA_TGT_SESS_WORK_ABORT:
6306                         qlt_abort_work(tgt, prm);
6307                         break;
6308                 case QLA_TGT_SESS_WORK_TM:
6309                         qlt_tmr_work(tgt, prm);
6310                         break;
6311                 default:
6312                         BUG_ON(1);
6313                         break;
6314                 }
6315
6316                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6317
6318                 kfree(prm);
6319         }
6320         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6321 }
6322
6323 /* Must be called under tgt_host_action_mutex */
6324 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6325 {
6326         struct qla_tgt *tgt;
6327         int rc, i;
6328         struct qla_qpair_hint *h;
6329
6330         if (!QLA_TGT_MODE_ENABLED())
6331                 return 0;
6332
6333         if (!IS_TGT_MODE_CAPABLE(ha)) {
6334                 ql_log(ql_log_warn, base_vha, 0xe070,
6335                     "This adapter does not support target mode.\n");
6336                 return 0;
6337         }
6338
6339         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6340             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6341
6342         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6343
6344         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6345         if (!tgt) {
6346                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6347                     "Unable to allocate struct qla_tgt\n");
6348                 return -ENOMEM;
6349         }
6350
6351         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6352                                sizeof(struct qla_qpair_hint),
6353                                GFP_KERNEL);
6354         if (!tgt->qphints) {
6355                 kfree(tgt);
6356                 ql_log(ql_log_warn, base_vha, 0x0197,
6357                     "Unable to allocate qpair hints.\n");
6358                 return -ENOMEM;
6359         }
6360
6361         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6362                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6363
6364         rc = btree_init64(&tgt->lun_qpair_map);
6365         if (rc) {
6366                 kfree(tgt->qphints);
6367                 kfree(tgt);
6368                 ql_log(ql_log_info, base_vha, 0x0198,
6369                         "Unable to initialize lun_qpair_map btree\n");
6370                 return -EIO;
6371         }
6372         h = &tgt->qphints[0];
6373         h->qpair = ha->base_qpair;
6374         INIT_LIST_HEAD(&h->hint_elem);
6375         h->cpuid = ha->base_qpair->cpuid;
6376         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6377
6378         for (i = 0; i < ha->max_qpairs; i++) {
6379                 unsigned long flags;
6380
6381                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6382
6383                 h = &tgt->qphints[i + 1];
6384                 INIT_LIST_HEAD(&h->hint_elem);
6385                 if (qpair) {
6386                         h->qpair = qpair;
6387                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6388                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6389                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6390                         h->cpuid = qpair->cpuid;
6391                 }
6392         }
6393
6394         tgt->ha = ha;
6395         tgt->vha = base_vha;
6396         init_waitqueue_head(&tgt->waitQ);
6397         INIT_LIST_HEAD(&tgt->del_sess_list);
6398         spin_lock_init(&tgt->sess_work_lock);
6399         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6400         INIT_LIST_HEAD(&tgt->sess_works_list);
6401         atomic_set(&tgt->tgt_global_resets_count, 0);
6402
6403         base_vha->vha_tgt.qla_tgt = tgt;
6404
6405         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6406                 "qla_target(%d): using 64 Bit PCI addressing",
6407                 base_vha->vp_idx);
6408         /* 3 is reserved */
6409         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6410
6411         mutex_lock(&qla_tgt_mutex);
6412         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6413         mutex_unlock(&qla_tgt_mutex);
6414
6415         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6416                 ha->tgt.tgt_ops->add_target(base_vha);
6417
6418         return 0;
6419 }
6420
6421 /* Must be called under tgt_host_action_mutex */
6422 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6423 {
6424         if (!vha->vha_tgt.qla_tgt)
6425                 return 0;
6426
6427         if (vha->fc_vport) {
6428                 qlt_release(vha->vha_tgt.qla_tgt);
6429                 return 0;
6430         }
6431
6432         /* free left over qfull cmds */
6433         qlt_init_term_exchange(vha);
6434
6435         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6436             vha->host_no, ha);
6437         qlt_release(vha->vha_tgt.qla_tgt);
6438
6439         return 0;
6440 }
6441
6442 void qlt_remove_target_resources(struct qla_hw_data *ha)
6443 {
6444         struct scsi_qla_host *node;
6445         u32 key = 0;
6446
6447         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6448                 btree_remove32(&ha->tgt.host_map, key);
6449
6450         btree_destroy32(&ha->tgt.host_map);
6451 }
6452
6453 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6454         unsigned char *b)
6455 {
6456         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6457         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6458         put_unaligned_be64(wwpn, b);
6459         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6460 }
6461
6462 /**
6463  * qla_tgt_lport_register - register lport with external module
6464  *
6465  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6466  * @phys_wwpn: physical port WWPN
6467  * @npiv_wwpn: NPIV WWPN
6468  * @npiv_wwnn: NPIV WWNN
6469  * @callback:  lport initialization callback for tcm_qla2xxx code
6470  */
6471 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6472                        u64 npiv_wwpn, u64 npiv_wwnn,
6473                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6474 {
6475         struct qla_tgt *tgt;
6476         struct scsi_qla_host *vha;
6477         struct qla_hw_data *ha;
6478         struct Scsi_Host *host;
6479         unsigned long flags;
6480         int rc;
6481         u8 b[WWN_SIZE];
6482
6483         mutex_lock(&qla_tgt_mutex);
6484         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6485                 vha = tgt->vha;
6486                 ha = vha->hw;
6487
6488                 host = vha->host;
6489                 if (!host)
6490                         continue;
6491
6492                 if (!(host->hostt->supported_mode & MODE_TARGET))
6493                         continue;
6494
6495                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6496                         continue;
6497
6498                 spin_lock_irqsave(&ha->hardware_lock, flags);
6499                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6500                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6501                             host->host_no);
6502                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6503                         continue;
6504                 }
6505                 if (tgt->tgt_stop) {
6506                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6507                                  host->host_no);
6508                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6509                         continue;
6510                 }
6511                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6512
6513                 if (!scsi_host_get(host)) {
6514                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6515                             "Unable to scsi_host_get() for"
6516                             " qla2xxx scsi_host\n");
6517                         continue;
6518                 }
6519                 qlt_lport_dump(vha, phys_wwpn, b);
6520
6521                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6522                         scsi_host_put(host);
6523                         continue;
6524                 }
6525                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6526                 if (rc != 0)
6527                         scsi_host_put(host);
6528
6529                 mutex_unlock(&qla_tgt_mutex);
6530                 return rc;
6531         }
6532         mutex_unlock(&qla_tgt_mutex);
6533
6534         return -ENODEV;
6535 }
6536 EXPORT_SYMBOL(qlt_lport_register);
6537
6538 /**
6539  * qla_tgt_lport_deregister - Degister lport
6540  *
6541  * @vha:  Registered scsi_qla_host pointer
6542  */
6543 void qlt_lport_deregister(struct scsi_qla_host *vha)
6544 {
6545         struct qla_hw_data *ha = vha->hw;
6546         struct Scsi_Host *sh = vha->host;
6547         /*
6548          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6549          */
6550         vha->vha_tgt.target_lport_ptr = NULL;
6551         ha->tgt.tgt_ops = NULL;
6552         /*
6553          * Release the Scsi_Host reference for the underlying qla2xxx host
6554          */
6555         scsi_host_put(sh);
6556 }
6557 EXPORT_SYMBOL(qlt_lport_deregister);
6558
6559 /* Must be called under HW lock */
6560 void qlt_set_mode(struct scsi_qla_host *vha)
6561 {
6562         switch (vha->qlini_mode) {
6563         case QLA2XXX_INI_MODE_DISABLED:
6564         case QLA2XXX_INI_MODE_EXCLUSIVE:
6565                 vha->host->active_mode = MODE_TARGET;
6566                 break;
6567         case QLA2XXX_INI_MODE_ENABLED:
6568                 vha->host->active_mode = MODE_INITIATOR;
6569                 break;
6570         case QLA2XXX_INI_MODE_DUAL:
6571                 vha->host->active_mode = MODE_DUAL;
6572                 break;
6573         default:
6574                 break;
6575         }
6576 }
6577
6578 /* Must be called under HW lock */
6579 static void qlt_clear_mode(struct scsi_qla_host *vha)
6580 {
6581         switch (vha->qlini_mode) {
6582         case QLA2XXX_INI_MODE_DISABLED:
6583                 vha->host->active_mode = MODE_UNKNOWN;
6584                 break;
6585         case QLA2XXX_INI_MODE_EXCLUSIVE:
6586                 vha->host->active_mode = MODE_INITIATOR;
6587                 break;
6588         case QLA2XXX_INI_MODE_ENABLED:
6589         case QLA2XXX_INI_MODE_DUAL:
6590                 vha->host->active_mode = MODE_INITIATOR;
6591                 break;
6592         default:
6593                 break;
6594         }
6595 }
6596
6597 /*
6598  * qla_tgt_enable_vha - NO LOCK HELD
6599  *
6600  * host_reset, bring up w/ Target Mode Enabled
6601  */
6602 void
6603 qlt_enable_vha(struct scsi_qla_host *vha)
6604 {
6605         struct qla_hw_data *ha = vha->hw;
6606         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6607         unsigned long flags;
6608         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6609
6610         if (!tgt) {
6611                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6612                     "Unable to locate qla_tgt pointer from"
6613                     " struct qla_hw_data\n");
6614                 dump_stack();
6615                 return;
6616         }
6617         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6618                 return;
6619
6620         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6621                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6622         spin_lock_irqsave(&ha->hardware_lock, flags);
6623         tgt->tgt_stopped = 0;
6624         qlt_set_mode(vha);
6625         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6626
6627         mutex_lock(&ha->optrom_mutex);
6628         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6629             "%s.\n", __func__);
6630         if (vha->vp_idx) {
6631                 qla24xx_disable_vp(vha);
6632                 qla24xx_enable_vp(vha);
6633         } else {
6634                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6635                 qla2xxx_wake_dpc(base_vha);
6636                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6637                              QLA_SUCCESS);
6638         }
6639         mutex_unlock(&ha->optrom_mutex);
6640 }
6641 EXPORT_SYMBOL(qlt_enable_vha);
6642
6643 /*
6644  * qla_tgt_disable_vha - NO LOCK HELD
6645  *
6646  * Disable Target Mode and reset the adapter
6647  */
6648 static void qlt_disable_vha(struct scsi_qla_host *vha)
6649 {
6650         struct qla_hw_data *ha = vha->hw;
6651         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6652         unsigned long flags;
6653
6654         if (!tgt) {
6655                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6656                     "Unable to locate qla_tgt pointer from"
6657                     " struct qla_hw_data\n");
6658                 dump_stack();
6659                 return;
6660         }
6661
6662         spin_lock_irqsave(&ha->hardware_lock, flags);
6663         qlt_clear_mode(vha);
6664         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6665
6666         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6667         qla2xxx_wake_dpc(vha);
6668         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6669                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6670                        "qla2x00_wait_for_hba_online() failed\n");
6671 }
6672
6673 /*
6674  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6675  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6676  * members.
6677  */
6678 void
6679 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6680 {
6681         vha->vha_tgt.qla_tgt = NULL;
6682
6683         mutex_init(&vha->vha_tgt.tgt_mutex);
6684         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6685
6686         qlt_clear_mode(vha);
6687
6688         /*
6689          * NOTE: Currently the value is kept the same for <24xx and
6690          * >=24xx ISPs. If it is necessary to change it,
6691          * the check should be added for specific ISPs,
6692          * assigning the value appropriately.
6693          */
6694         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6695
6696         qlt_add_target(ha, vha);
6697 }
6698
6699 u8
6700 qlt_rff_id(struct scsi_qla_host *vha)
6701 {
6702         u8 fc4_feature = 0;
6703         /*
6704          * FC-4 Feature bit 0 indicates target functionality to the name server.
6705          */
6706         if (qla_tgt_mode_enabled(vha)) {
6707                 fc4_feature = BIT_0;
6708         } else if (qla_ini_mode_enabled(vha)) {
6709                 fc4_feature = BIT_1;
6710         } else if (qla_dual_mode_enabled(vha))
6711                 fc4_feature = BIT_0 | BIT_1;
6712
6713         return fc4_feature;
6714 }
6715
6716 /*
6717  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6718  * @ha: HA context
6719  *
6720  * Beginning of ATIO ring has initialization control block already built
6721  * by nvram config routine.
6722  *
6723  * Returns 0 on success.
6724  */
6725 void
6726 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6727 {
6728         struct qla_hw_data *ha = vha->hw;
6729         uint16_t cnt;
6730         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6731
6732         if (qla_ini_mode_enabled(vha))
6733                 return;
6734
6735         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6736                 pkt->u.raw.signature = ATIO_PROCESSED;
6737                 pkt++;
6738         }
6739
6740 }
6741
6742 /*
6743  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6744  * @ha: SCSI driver HA context
6745  */
6746 void
6747 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6748 {
6749         struct qla_hw_data *ha = vha->hw;
6750         struct atio_from_isp *pkt;
6751         int cnt, i;
6752
6753         if (!ha->flags.fw_started)
6754                 return;
6755
6756         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6757             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6758                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6759                 cnt = pkt->u.raw.entry_count;
6760
6761                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6762                         /*
6763                          * This packet is corrupted. The header + payload
6764                          * can not be trusted. There is no point in passing
6765                          * it further up.
6766                          */
6767                         ql_log(ql_log_warn, vha, 0xd03c,
6768                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6769                             &pkt->u.isp24.fcp_hdr.s_id,
6770                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6771                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6772
6773                         adjust_corrupted_atio(pkt);
6774                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6775                             ha_locked, 0);
6776                 } else {
6777                         qlt_24xx_atio_pkt_all_vps(vha,
6778                             (struct atio_from_isp *)pkt, ha_locked);
6779                 }
6780
6781                 for (i = 0; i < cnt; i++) {
6782                         ha->tgt.atio_ring_index++;
6783                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6784                                 ha->tgt.atio_ring_index = 0;
6785                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6786                         } else
6787                                 ha->tgt.atio_ring_ptr++;
6788
6789                         pkt->u.raw.signature = ATIO_PROCESSED;
6790                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6791                 }
6792                 wmb();
6793         }
6794
6795         /* Adjust ring index */
6796         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6797 }
6798
6799 void
6800 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6801 {
6802         struct qla_hw_data *ha = vha->hw;
6803         struct qla_msix_entry *msix = &ha->msix_entries[2];
6804         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6805
6806         if (!QLA_TGT_MODE_ENABLED())
6807                 return;
6808
6809         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6810         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6811         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6812
6813         if (ha->flags.msix_enabled) {
6814                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6815                         if (IS_QLA2071(ha)) {
6816                                 /* 4 ports Baker: Enable Interrupt Handshake */
6817                                 icb->msix_atio = 0;
6818                                 icb->firmware_options_2 |= BIT_26;
6819                         } else {
6820                                 icb->msix_atio = cpu_to_le16(msix->entry);
6821                                 icb->firmware_options_2 &= ~BIT_26;
6822                         }
6823                         ql_dbg(ql_dbg_init, vha, 0xf072,
6824                             "Registering ICB vector 0x%x for atio que.\n",
6825                             msix->entry);
6826                 }
6827         } else {
6828                 /* INTx|MSI */
6829                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6830                         icb->msix_atio = 0;
6831                         icb->firmware_options_2 |= BIT_26;
6832                         ql_dbg(ql_dbg_init, vha, 0xf072,
6833                             "%s: Use INTx for ATIOQ.\n", __func__);
6834                 }
6835         }
6836 }
6837
6838 void
6839 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6840 {
6841         struct qla_hw_data *ha = vha->hw;
6842         u32 tmp;
6843
6844         if (!QLA_TGT_MODE_ENABLED())
6845                 return;
6846
6847         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6848                 if (!ha->tgt.saved_set) {
6849                         /* We save only once */
6850                         ha->tgt.saved_exchange_count = nv->exchange_count;
6851                         ha->tgt.saved_firmware_options_1 =
6852                             nv->firmware_options_1;
6853                         ha->tgt.saved_firmware_options_2 =
6854                             nv->firmware_options_2;
6855                         ha->tgt.saved_firmware_options_3 =
6856                             nv->firmware_options_3;
6857                         ha->tgt.saved_set = 1;
6858                 }
6859
6860                 if (qla_tgt_mode_enabled(vha))
6861                         nv->exchange_count = cpu_to_le16(0xFFFF);
6862                 else                    /* dual */
6863                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6864
6865                 /* Enable target mode */
6866                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6867
6868                 /* Disable ini mode, if requested */
6869                 if (qla_tgt_mode_enabled(vha))
6870                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6871
6872                 /* Disable Full Login after LIP */
6873                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6874                 /* Enable initial LIP */
6875                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6876                 if (ql2xtgt_tape_enable)
6877                         /* Enable FC Tape support */
6878                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6879                 else
6880                         /* Disable FC Tape support */
6881                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6882
6883                 /* Disable Full Login after LIP */
6884                 nv->host_p &= cpu_to_le32(~BIT_10);
6885
6886                 /*
6887                  * clear BIT 15 explicitly as we have seen at least
6888                  * a couple of instances where this was set and this
6889                  * was causing the firmware to not be initialized.
6890                  */
6891                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6892                 /* Enable target PRLI control */
6893                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6894
6895                 if (IS_QLA25XX(ha)) {
6896                         /* Change Loop-prefer to Pt-Pt */
6897                         tmp = ~(BIT_4|BIT_5|BIT_6);
6898                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6899                         tmp = P2P << 4;
6900                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6901                 }
6902         } else {
6903                 if (ha->tgt.saved_set) {
6904                         nv->exchange_count = ha->tgt.saved_exchange_count;
6905                         nv->firmware_options_1 =
6906                             ha->tgt.saved_firmware_options_1;
6907                         nv->firmware_options_2 =
6908                             ha->tgt.saved_firmware_options_2;
6909                         nv->firmware_options_3 =
6910                             ha->tgt.saved_firmware_options_3;
6911                 }
6912                 return;
6913         }
6914
6915         if (ha->base_qpair->enable_class_2) {
6916                 if (vha->flags.init_done)
6917                         fc_host_supported_classes(vha->host) =
6918                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6919
6920                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6921         } else {
6922                 if (vha->flags.init_done)
6923                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6924
6925                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6926         }
6927 }
6928
6929 void
6930 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6931         struct init_cb_24xx *icb)
6932 {
6933         struct qla_hw_data *ha = vha->hw;
6934
6935         if (!QLA_TGT_MODE_ENABLED())
6936                 return;
6937
6938         if (ha->tgt.node_name_set) {
6939                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6940                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6941         }
6942 }
6943
6944 void
6945 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6946 {
6947         struct qla_hw_data *ha = vha->hw;
6948         u32 tmp;
6949
6950         if (!QLA_TGT_MODE_ENABLED())
6951                 return;
6952
6953         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6954                 if (!ha->tgt.saved_set) {
6955                         /* We save only once */
6956                         ha->tgt.saved_exchange_count = nv->exchange_count;
6957                         ha->tgt.saved_firmware_options_1 =
6958                             nv->firmware_options_1;
6959                         ha->tgt.saved_firmware_options_2 =
6960                             nv->firmware_options_2;
6961                         ha->tgt.saved_firmware_options_3 =
6962                             nv->firmware_options_3;
6963                         ha->tgt.saved_set = 1;
6964                 }
6965
6966                 if (qla_tgt_mode_enabled(vha))
6967                         nv->exchange_count = cpu_to_le16(0xFFFF);
6968                 else                    /* dual */
6969                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6970
6971                 /* Enable target mode */
6972                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6973
6974                 /* Disable ini mode, if requested */
6975                 if (qla_tgt_mode_enabled(vha))
6976                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6977                 /* Disable Full Login after LIP */
6978                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6979                 /* Enable initial LIP */
6980                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6981                 /*
6982                  * clear BIT 15 explicitly as we have seen at
6983                  * least a couple of instances where this was set
6984                  * and this was causing the firmware to not be
6985                  * initialized.
6986                  */
6987                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6988                 if (ql2xtgt_tape_enable)
6989                         /* Enable FC tape support */
6990                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6991                 else
6992                         /* Disable FC tape support */
6993                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6994
6995                 /* Disable Full Login after LIP */
6996                 nv->host_p &= cpu_to_le32(~BIT_10);
6997                 /* Enable target PRLI control */
6998                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6999
7000                 /* Change Loop-prefer to Pt-Pt */
7001                 tmp = ~(BIT_4|BIT_5|BIT_6);
7002                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7003                 tmp = P2P << 4;
7004                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7005         } else {
7006                 if (ha->tgt.saved_set) {
7007                         nv->exchange_count = ha->tgt.saved_exchange_count;
7008                         nv->firmware_options_1 =
7009                             ha->tgt.saved_firmware_options_1;
7010                         nv->firmware_options_2 =
7011                             ha->tgt.saved_firmware_options_2;
7012                         nv->firmware_options_3 =
7013                             ha->tgt.saved_firmware_options_3;
7014                 }
7015                 return;
7016         }
7017
7018         if (ha->base_qpair->enable_class_2) {
7019                 if (vha->flags.init_done)
7020                         fc_host_supported_classes(vha->host) =
7021                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7022
7023                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7024         } else {
7025                 if (vha->flags.init_done)
7026                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7027
7028                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7029         }
7030 }
7031
7032 void
7033 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7034         struct init_cb_81xx *icb)
7035 {
7036         struct qla_hw_data *ha = vha->hw;
7037
7038         if (!QLA_TGT_MODE_ENABLED())
7039                 return;
7040
7041         if (ha->tgt.node_name_set) {
7042                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7043                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7044         }
7045 }
7046
7047 void
7048 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7049 {
7050         if (!QLA_TGT_MODE_ENABLED())
7051                 return;
7052
7053         ha->msix_count += 1; /* For ATIO Q */
7054 }
7055
7056
7057 void
7058 qlt_modify_vp_config(struct scsi_qla_host *vha,
7059         struct vp_config_entry_24xx *vpmod)
7060 {
7061         /* enable target mode.  Bit5 = 1 => disable */
7062         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7063                 vpmod->options_idx1 &= ~BIT_5;
7064
7065         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7066         if (qla_tgt_mode_enabled(vha))
7067                 vpmod->options_idx1 &= ~BIT_4;
7068 }
7069
7070 void
7071 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7072 {
7073         int rc;
7074
7075         if (!QLA_TGT_MODE_ENABLED())
7076                 return;
7077
7078         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7079             IS_QLA28XX(ha)) {
7080                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7081                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7082         } else {
7083                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7084                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7085         }
7086
7087         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7088         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7089
7090         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7091         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7092             qlt_unknown_atio_work_fn);
7093
7094         qlt_clear_mode(base_vha);
7095
7096         rc = btree_init32(&ha->tgt.host_map);
7097         if (rc)
7098                 ql_log(ql_log_info, base_vha, 0xd03d,
7099                     "Unable to initialize ha->host_map btree\n");
7100
7101         qlt_update_vp_map(base_vha, SET_VP_IDX);
7102 }
7103
7104 irqreturn_t
7105 qla83xx_msix_atio_q(int irq, void *dev_id)
7106 {
7107         struct rsp_que *rsp;
7108         scsi_qla_host_t *vha;
7109         struct qla_hw_data *ha;
7110         unsigned long flags;
7111
7112         rsp = (struct rsp_que *) dev_id;
7113         ha = rsp->hw;
7114         vha = pci_get_drvdata(ha->pdev);
7115
7116         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7117
7118         qlt_24xx_process_atio_queue(vha, 0);
7119
7120         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7121
7122         return IRQ_HANDLED;
7123 }
7124
7125 static void
7126 qlt_handle_abts_recv_work(struct work_struct *work)
7127 {
7128         struct qla_tgt_sess_op *op = container_of(work,
7129                 struct qla_tgt_sess_op, work);
7130         scsi_qla_host_t *vha = op->vha;
7131         struct qla_hw_data *ha = vha->hw;
7132         unsigned long flags;
7133
7134         if (qla2x00_reset_active(vha) ||
7135             (op->chip_reset != ha->base_qpair->chip_reset))
7136                 return;
7137
7138         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7139         qlt_24xx_process_atio_queue(vha, 0);
7140         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7141
7142         spin_lock_irqsave(&ha->hardware_lock, flags);
7143         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7144         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7145
7146         kfree(op);
7147 }
7148
7149 void
7150 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7151     response_t *pkt)
7152 {
7153         struct qla_tgt_sess_op *op;
7154
7155         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7156
7157         if (!op) {
7158                 /* do not reach for ATIO queue here.  This is best effort err
7159                  * recovery at this point.
7160                  */
7161                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7162                 return;
7163         }
7164
7165         memcpy(&op->atio, pkt, sizeof(*pkt));
7166         op->vha = vha;
7167         op->chip_reset = vha->hw->base_qpair->chip_reset;
7168         op->rsp = rsp;
7169         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7170         queue_work(qla_tgt_wq, &op->work);
7171         return;
7172 }
7173
7174 int
7175 qlt_mem_alloc(struct qla_hw_data *ha)
7176 {
7177         if (!QLA_TGT_MODE_ENABLED())
7178                 return 0;
7179
7180         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7181                                      sizeof(struct qla_tgt_vp_map),
7182                                      GFP_KERNEL);
7183         if (!ha->tgt.tgt_vp_map)
7184                 return -ENOMEM;
7185
7186         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7187             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7188             &ha->tgt.atio_dma, GFP_KERNEL);
7189         if (!ha->tgt.atio_ring) {
7190                 kfree(ha->tgt.tgt_vp_map);
7191                 return -ENOMEM;
7192         }
7193         return 0;
7194 }
7195
7196 void
7197 qlt_mem_free(struct qla_hw_data *ha)
7198 {
7199         if (!QLA_TGT_MODE_ENABLED())
7200                 return;
7201
7202         if (ha->tgt.atio_ring) {
7203                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7204                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7205                     ha->tgt.atio_dma);
7206         }
7207         ha->tgt.atio_ring = NULL;
7208         ha->tgt.atio_dma = 0;
7209         kfree(ha->tgt.tgt_vp_map);
7210         ha->tgt.tgt_vp_map = NULL;
7211 }
7212
7213 /* vport_slock to be held by the caller */
7214 void
7215 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7216 {
7217         void *slot;
7218         u32 key;
7219         int rc;
7220
7221         if (!QLA_TGT_MODE_ENABLED())
7222                 return;
7223
7224         key = vha->d_id.b24;
7225
7226         switch (cmd) {
7227         case SET_VP_IDX:
7228                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7229                 break;
7230         case SET_AL_PA:
7231                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7232                 if (!slot) {
7233                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7234                             "Save vha in host_map %p %06x\n", vha, key);
7235                         rc = btree_insert32(&vha->hw->tgt.host_map,
7236                                 key, vha, GFP_ATOMIC);
7237                         if (rc)
7238                                 ql_log(ql_log_info, vha, 0xd03e,
7239                                     "Unable to insert s_id into host_map: %06x\n",
7240                                     key);
7241                         return;
7242                 }
7243                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7244                     "replace existing vha in host_map %p %06x\n", vha, key);
7245                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7246                 break;
7247         case RESET_VP_IDX:
7248                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7249                 break;
7250         case RESET_AL_PA:
7251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7252                    "clear vha in host_map %p %06x\n", vha, key);
7253                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7254                 if (slot)
7255                         btree_remove32(&vha->hw->tgt.host_map, key);
7256                 vha->d_id.b24 = 0;
7257                 break;
7258         }
7259 }
7260
7261 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7262 {
7263
7264         if (!vha->d_id.b24) {
7265                 vha->d_id = id;
7266                 qlt_update_vp_map(vha, SET_AL_PA);
7267         } else if (vha->d_id.b24 != id.b24) {
7268                 qlt_update_vp_map(vha, RESET_AL_PA);
7269                 vha->d_id = id;
7270                 qlt_update_vp_map(vha, SET_AL_PA);
7271         }
7272 }
7273
7274 static int __init qlt_parse_ini_mode(void)
7275 {
7276         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7277                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7278         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7279                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7280         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7281                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7282         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7283                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7284         else
7285                 return false;
7286
7287         return true;
7288 }
7289
7290 int __init qlt_init(void)
7291 {
7292         int ret;
7293
7294         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7295         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7296
7297         if (!qlt_parse_ini_mode()) {
7298                 ql_log(ql_log_fatal, NULL, 0xe06b,
7299                     "qlt_parse_ini_mode() failed\n");
7300                 return -EINVAL;
7301         }
7302
7303         if (!QLA_TGT_MODE_ENABLED())
7304                 return 0;
7305
7306         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7307             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7308             qla_tgt_mgmt_cmd), 0, NULL);
7309         if (!qla_tgt_mgmt_cmd_cachep) {
7310                 ql_log(ql_log_fatal, NULL, 0xd04b,
7311                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7312                 return -ENOMEM;
7313         }
7314
7315         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7316             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7317             0, NULL);
7318
7319         if (!qla_tgt_plogi_cachep) {
7320                 ql_log(ql_log_fatal, NULL, 0xe06d,
7321                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7322                 ret = -ENOMEM;
7323                 goto out_mgmt_cmd_cachep;
7324         }
7325
7326         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7327             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7328         if (!qla_tgt_mgmt_cmd_mempool) {
7329                 ql_log(ql_log_fatal, NULL, 0xe06e,
7330                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7331                 ret = -ENOMEM;
7332                 goto out_plogi_cachep;
7333         }
7334
7335         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7336         if (!qla_tgt_wq) {
7337                 ql_log(ql_log_fatal, NULL, 0xe06f,
7338                     "alloc_workqueue for qla_tgt_wq failed\n");
7339                 ret = -ENOMEM;
7340                 goto out_cmd_mempool;
7341         }
7342         /*
7343          * Return 1 to signal that initiator-mode is being disabled
7344          */
7345         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7346
7347 out_cmd_mempool:
7348         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7349 out_plogi_cachep:
7350         kmem_cache_destroy(qla_tgt_plogi_cachep);
7351 out_mgmt_cmd_cachep:
7352         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7353         return ret;
7354 }
7355
7356 void qlt_exit(void)
7357 {
7358         if (!QLA_TGT_MODE_ENABLED())
7359                 return;
7360
7361         destroy_workqueue(qla_tgt_wq);
7362         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7363         kmem_cache_destroy(qla_tgt_plogi_cachep);
7364         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7365 }