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