drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 0;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2xuctrlirq = 1;
  70 module_param(ql2xuctrlirq, int, 0644);
  71 MODULE_PARM_DESC(ql2xuctrlirq,
  72     "User to control IRQ placement via smp_affinity."
  73     "Valid with qlini_mode=disabled."
  74     "1(default): enable");
  75
  76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  77
  78 static int qla_sam_status = SAM_STAT_BUSY;
  79 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  80
  81 /*
  82  * From scsi/fc/fc_fcp.h
  83  */
  84 enum fcp_resp_rsp_codes {
  85         FCP_TMF_CMPL = 0,
  86         FCP_DATA_LEN_INVALID = 1,
  87         FCP_CMND_FIELDS_INVALID = 2,
  88         FCP_DATA_PARAM_MISMATCH = 3,
  89         FCP_TMF_REJECTED = 4,
  90         FCP_TMF_FAILED = 5,
  91         FCP_TMF_INVALID_LUN = 9,
  92 };
  93
  94 /*
  95  * fc_pri_ta from scsi/fc/fc_fcp.h
  96  */
  97 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  98 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  99 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
 100 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 101 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 102 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 103 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 104
 105 /*
 106  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 107  * must be called under HW lock and could unlock/lock it inside.
 108  * It isn't an issue, since in the current implementation on the time when
 109  * those functions are called:
 110  *
 111  *   - Either context is IRQ and only IRQ handler can modify HW data,
 112  *     including rings related fields,
 113  *
 114  *   - Or access to target mode variables from struct qla_tgt doesn't
 115  *     cross those functions boundaries, except tgt_stop, which
 116  *     additionally protected by irq_cmd_count.
 117  */
 118 /* Predefs for callbacks handed to qla2xxx LLD */
 119 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 120         struct atio_from_isp *pkt, uint8_t);
 121 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 122         response_t *pkt);
 123 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 124         int fn, void *iocb, int flags);
 125 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 126         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 127 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 128         struct atio_from_isp *atio, uint16_t status, int qfull);
 129 static void qlt_disable_vha(struct scsi_qla_host *vha);
 130 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 131 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 132         struct imm_ntfy_from_isp *ntfy,
 133         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 134         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 135 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 136         struct imm_ntfy_from_isp *imm, int ha_locked);
 137 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 138         fc_port_t *fcport, bool local);
 139 void qlt_unreg_sess(struct fc_port *sess);
 140 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 141         struct abts_recv_from_24xx *);
 142 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 143     uint16_t);
 144
 145 /*
 146  * Global Variables
 147  */
 148 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 149 struct kmem_cache *qla_tgt_plogi_cachep;
 150 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 151 static struct workqueue_struct *qla_tgt_wq;
 152 static DEFINE_MUTEX(qla_tgt_mutex);
 153 static LIST_HEAD(qla_tgt_glist);
 154
 155 static const char *prot_op_str(u32 prot_op)
 156 {
 157         switch (prot_op) {
 158         case TARGET_PROT_NORMAL:        return "NORMAL";
 159         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 160         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 161         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 162         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 163         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 164         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 165         default:                        return "UNKNOWN";
 166         }
 167 }
 168
 169 /* This API intentionally takes dest as a parameter, rather than returning
 170  * int value to avoid caller forgetting to issue wmb() after the store */
 171 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 172 {
 173         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 174         *dest = atomic_inc_return(&base_vha->generation_tick);
 175         /* memory barrier */
 176         wmb();
 177 }
 178
 179 /* Might release hw lock, then reaquire!! */
 180 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 181 {
 182         /* Send marker if required */
 183         if (unlikely(vha->marker_needed != 0)) {
 184                 int rc = qla2x00_issue_marker(vha, vha_locked);
 185                 if (rc != QLA_SUCCESS) {
 186                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 187                             "qla_target(%d): issue_marker() failed\n",
 188                             vha->vp_idx);
 189                 }
 190                 return rc;
 191         }
 192         return QLA_SUCCESS;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 197         uint8_t *d_id)
 198 {
 199         struct scsi_qla_host *host;
 200         uint32_t key = 0;
 201
 202         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 203             (vha->d_id.b.al_pa == d_id[2]))
 204                 return vha;
 205
 206         key  = (uint32_t)d_id[0] << 16;
 207         key |= (uint32_t)d_id[1] <<  8;
 208         key |= (uint32_t)d_id[2];
 209
 210         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 211         if (!host)
 212                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 213                     "Unable to find host %06x\n", key);
 214
 215         return host;
 216 }
 217
 218 static inline
 219 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 220         uint16_t vp_idx)
 221 {
 222         struct qla_hw_data *ha = vha->hw;
 223
 224         if (vha->vp_idx == vp_idx)
 225                 return vha;
 226
 227         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 228         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 229                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 230
 231         return NULL;
 232 }
 233
 234 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 235 {
 236         unsigned long flags;
 237
 238         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 239
 240         vha->hw->tgt.num_pend_cmds++;
 241         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 242                 vha->qla_stats.stat_max_pend_cmds =
 243                         vha->hw->tgt.num_pend_cmds;
 244         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 245 }
 246 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 247 {
 248         unsigned long flags;
 249
 250         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 251         vha->hw->tgt.num_pend_cmds--;
 252         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 253 }
 254
 255
 256 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 257         struct atio_from_isp *atio, uint8_t ha_locked)
 258 {
 259         struct qla_tgt_sess_op *u;
 260         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 261         unsigned long flags;
 262
 263         if (tgt->tgt_stop) {
 264                 ql_dbg(ql_dbg_async, vha, 0x502c,
 265                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 266                     vha->vp_idx);
 267                 goto out_term;
 268         }
 269
 270         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 271         if (u == NULL)
 272                 goto out_term;
 273
 274         u->vha = vha;
 275         memcpy(&u->atio, atio, sizeof(*atio));
 276         INIT_LIST_HEAD(&u->cmd_list);
 277
 278         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 279         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 280         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 281
 282         schedule_delayed_work(&vha->unknown_atio_work, 1);
 283
 284 out:
 285         return;
 286
 287 out_term:
 288         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 289         goto out;
 290 }
 291
 292 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 293         uint8_t ha_locked)
 294 {
 295         struct qla_tgt_sess_op *u, *t;
 296         scsi_qla_host_t *host;
 297         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 298         unsigned long flags;
 299         uint8_t queued = 0;
 300
 301         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 302                 if (u->aborted) {
 303                         ql_dbg(ql_dbg_async, vha, 0x502e,
 304                             "Freeing unknown %s %p, because of Abort\n",
 305                             "ATIO_TYPE7", u);
 306                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 307                             &u->atio, ha_locked, 0);
 308                         goto abort;
 309                 }
 310
 311                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 312                 if (host != NULL) {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 314                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 315                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 316                 } else if (tgt->tgt_stop) {
 317                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 318                             "Freeing unknown %s %p, because tgt is being stopped\n",
 319                             "ATIO_TYPE7", u);
 320                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 321                             &u->atio, ha_locked, 0);
 322                 } else {
 323                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 324                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 325                         if (!queued) {
 326                                 queued = 1;
 327                                 schedule_delayed_work(&vha->unknown_atio_work,
 328                                     1);
 329                         }
 330                         continue;
 331                 }
 332
 333 abort:
 334                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 335                 list_del(&u->cmd_list);
 336                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 337                 kfree(u);
 338         }
 339 }
 340
 341 void qlt_unknown_atio_work_fn(struct work_struct *work)
 342 {
 343         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 344             struct scsi_qla_host, unknown_atio_work);
 345
 346         qlt_try_to_dequeue_unknown_atios(vha, 0);
 347 }
 348
 349 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 350         struct atio_from_isp *atio, uint8_t ha_locked)
 351 {
 352         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 353                 "%s: qla_target(%d): type %x ox_id %04x\n",
 354                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 355                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 356
 357         switch (atio->u.raw.entry_type) {
 358         case ATIO_TYPE7:
 359         {
 360                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 361                     atio->u.isp24.fcp_hdr.d_id);
 362                 if (unlikely(NULL == host)) {
 363                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 364                             "qla_target(%d): Received ATIO_TYPE7 "
 365                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 366                             atio->u.isp24.fcp_hdr.d_id[0],
 367                             atio->u.isp24.fcp_hdr.d_id[1],
 368                             atio->u.isp24.fcp_hdr.d_id[2]);
 369
 370
 371                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 372                         break;
 373                 }
 374                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 375                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 376
 377                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 378                 break;
 379         }
 380
 381         case IMMED_NOTIFY_TYPE:
 382         {
 383                 struct scsi_qla_host *host = vha;
 384                 struct imm_ntfy_from_isp *entry =
 385                     (struct imm_ntfy_from_isp *)atio;
 386
 387                 qlt_issue_marker(vha, ha_locked);
 388
 389                 if ((entry->u.isp24.vp_index != 0xFF) &&
 390                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 391                         host = qlt_find_host_by_vp_idx(vha,
 392                             entry->u.isp24.vp_index);
 393                         if (unlikely(!host)) {
 394                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 395                                     "qla_target(%d): Received "
 396                                     "ATIO (IMMED_NOTIFY_TYPE) "
 397                                     "with unknown vp_index %d\n",
 398                                     vha->vp_idx, entry->u.isp24.vp_index);
 399                                 break;
 400                         }
 401                 }
 402                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 403                 break;
 404         }
 405
 406         case VP_RPT_ID_IOCB_TYPE:
 407                 qla24xx_report_id_acquisition(vha,
 408                         (struct vp_rpt_id_entry_24xx *)atio);
 409                 break;
 410
 411         case ABTS_RECV_24XX:
 412         {
 413                 struct abts_recv_from_24xx *entry =
 414                         (struct abts_recv_from_24xx *)atio;
 415                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 416                         entry->vp_index);
 417                 unsigned long flags;
 418
 419                 if (unlikely(!host)) {
 420                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 421                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 422                             "received, with unknown vp_index %d\n",
 423                             vha->vp_idx, entry->vp_index);
 424                         break;
 425                 }
 426                 if (!ha_locked)
 427                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 428                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 429                 if (!ha_locked)
 430                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 431                 break;
 432         }
 433
 434         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 435
 436         default:
 437                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 438                     "qla_target(%d): Received unknown ATIO atio "
 439                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 440                 break;
 441         }
 442
 443         return false;
 444 }
 445
 446 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 447         struct rsp_que *rsp, response_t *pkt)
 448 {
 449         switch (pkt->entry_type) {
 450         case CTIO_CRC2:
 451                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 452                         "qla_target(%d):%s: CRC2 Response pkt\n",
 453                         vha->vp_idx, __func__);
 454                 /* fall through */
 455         case CTIO_TYPE7:
 456         {
 457                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 458                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 459                     entry->vp_index);
 460                 if (unlikely(!host)) {
 461                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 462                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 463                             "received, with unknown vp_index %d\n",
 464                             vha->vp_idx, entry->vp_index);
 465                         break;
 466                 }
 467                 qlt_response_pkt(host, rsp, pkt);
 468                 break;
 469         }
 470
 471         case IMMED_NOTIFY_TYPE:
 472         {
 473                 struct scsi_qla_host *host = vha;
 474                 struct imm_ntfy_from_isp *entry =
 475                     (struct imm_ntfy_from_isp *)pkt;
 476
 477                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 478                 if (unlikely(!host)) {
 479                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 480                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 481                             "received, with unknown vp_index %d\n",
 482                             vha->vp_idx, entry->u.isp24.vp_index);
 483                         break;
 484                 }
 485                 qlt_response_pkt(host, rsp, pkt);
 486                 break;
 487         }
 488
 489         case NOTIFY_ACK_TYPE:
 490         {
 491                 struct scsi_qla_host *host = vha;
 492                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 493
 494                 if (0xFF != entry->u.isp24.vp_index) {
 495                         host = qlt_find_host_by_vp_idx(vha,
 496                             entry->u.isp24.vp_index);
 497                         if (unlikely(!host)) {
 498                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 499                                     "qla_target(%d): Response "
 500                                     "pkt (NOTIFY_ACK_TYPE) "
 501                                     "received, with unknown "
 502                                     "vp_index %d\n", vha->vp_idx,
 503                                     entry->u.isp24.vp_index);
 504                                 break;
 505                         }
 506                 }
 507                 qlt_response_pkt(host, rsp, pkt);
 508                 break;
 509         }
 510
 511         case ABTS_RECV_24XX:
 512         {
 513                 struct abts_recv_from_24xx *entry =
 514                     (struct abts_recv_from_24xx *)pkt;
 515                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 516                     entry->vp_index);
 517                 if (unlikely(!host)) {
 518                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 519                             "qla_target(%d): Response pkt "
 520                             "(ABTS_RECV_24XX) received, with unknown "
 521                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 522                         break;
 523                 }
 524                 qlt_response_pkt(host, rsp, pkt);
 525                 break;
 526         }
 527
 528         case ABTS_RESP_24XX:
 529         {
 530                 struct abts_resp_to_24xx *entry =
 531                     (struct abts_resp_to_24xx *)pkt;
 532                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 533                     entry->vp_index);
 534                 if (unlikely(!host)) {
 535                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 536                             "qla_target(%d): Response pkt "
 537                             "(ABTS_RECV_24XX) received, with unknown "
 538                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 539                         break;
 540                 }
 541                 qlt_response_pkt(host, rsp, pkt);
 542                 break;
 543         }
 544
 545         default:
 546                 qlt_response_pkt(vha, rsp, pkt);
 547                 break;
 548         }
 549
 550 }
 551
 552 /*
 553  * All qlt_plogi_ack_t operations are protected by hardware_lock
 554  */
 555 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 556         struct imm_ntfy_from_isp *ntfy, int type)
 557 {
 558         struct qla_work_evt *e;
 559         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 560         if (!e)
 561                 return QLA_FUNCTION_FAILED;
 562
 563         e->u.nack.fcport = fcport;
 564         e->u.nack.type = type;
 565         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 566         return qla2x00_post_work(vha, e);
 567 }
 568
 569 static
 570 void qla2x00_async_nack_sp_done(void *s, int res)
 571 {
 572         struct srb *sp = (struct srb *)s;
 573         struct scsi_qla_host *vha = sp->vha;
 574         unsigned long flags;
 575
 576         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 577             "Async done-%s res %x %8phC  type %d\n",
 578             sp->name, res, sp->fcport->port_name, sp->type);
 579
 580         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 581         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 582         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 583
 584         switch (sp->type) {
 585         case SRB_NACK_PLOGI:
 586                 sp->fcport->login_gen++;
 587                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 588                 sp->fcport->logout_on_delete = 1;
 589                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 590                 sp->fcport->send_els_logo = 0;
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603
 604                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 605                             !vha->hw->flags.gpsc_supported) {
 606                                 ql_dbg(ql_dbg_disc, vha, 0x20f3,
 607                                     "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 608                                     __func__, __LINE__,
 609                                     sp->fcport->port_name,
 610                                     vha->fcport_count);
 611                                 sp->fcport->disc_state = DSC_UPD_FCPORT;
 612                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 613                         } else {
 614                                 ql_dbg(ql_dbg_disc, vha, 0x20f5,
 615                                     "%s %d %8phC post gpsc fcp_cnt %d\n",
 616                                     __func__, __LINE__,
 617                                     sp->fcport->port_name,
 618                                     vha->fcport_count);
 619
 620                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 621                         }
 622                 }
 623                 break;
 624
 625         case SRB_NACK_LOGO:
 626                 sp->fcport->login_gen++;
 627                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 628                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 629                 break;
 630         }
 631         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 632
 633         sp->free(sp);
 634 }
 635
 636 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 637         struct imm_ntfy_from_isp *ntfy, int type)
 638 {
 639         int rval = QLA_FUNCTION_FAILED;
 640         srb_t *sp;
 641         char *c = NULL;
 642
 643         fcport->flags |= FCF_ASYNC_SENT;
 644         switch (type) {
 645         case SRB_NACK_PLOGI:
 646                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 647                 c = "PLOGI";
 648                 break;
 649         case SRB_NACK_PRLI:
 650                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 651                 fcport->deleted = 0;
 652                 c = "PRLI";
 653                 break;
 654         case SRB_NACK_LOGO:
 655                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 656                 c = "LOGO";
 657                 break;
 658         }
 659
 660         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 661         if (!sp)
 662                 goto done;
 663
 664         sp->type = type;
 665         sp->name = "nack";
 666
 667         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 668
 669         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 670         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 671         sp->done = qla2x00_async_nack_sp_done;
 672
 673         rval = qla2x00_start_sp(sp);
 674         if (rval != QLA_SUCCESS)
 675                 goto done_free_sp;
 676
 677         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 678             "Async-%s %8phC hndl %x %s\n",
 679             sp->name, fcport->port_name, sp->handle, c);
 680
 681         return rval;
 682
 683 done_free_sp:
 684         sp->free(sp);
 685 done:
 686         fcport->flags &= ~FCF_ASYNC_SENT;
 687         return rval;
 688 }
 689
 690 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 691 {
 692         fc_port_t *t;
 693         unsigned long flags;
 694
 695         switch (e->u.nack.type) {
 696         case SRB_NACK_PRLI:
 697                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 698                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 699                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 700                 if (t) {
 701                         ql_log(ql_log_info, vha, 0xd034,
 702                             "%s create sess success %p", __func__, t);
 703                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 704                         /* create sess has an extra kref */
 705                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 706                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 707                 }
 708                 break;
 709         }
 710         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 711             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 712 }
 713
 714 void qla24xx_delete_sess_fn(struct work_struct *work)
 715 {
 716         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 717         struct qla_hw_data *ha = fcport->vha->hw;
 718         unsigned long flags;
 719
 720         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 721
 722         if (fcport->se_sess) {
 723                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 724                 ha->tgt.tgt_ops->put_sess(fcport);
 725         } else {
 726                 qlt_unreg_sess(fcport);
 727         }
 728         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 729 }
 730
 731 /*
 732  * Called from qla2x00_reg_remote_port()
 733  */
 734 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 735 {
 736         struct qla_hw_data *ha = vha->hw;
 737         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 738         struct fc_port *sess = fcport;
 739         unsigned long flags;
 740
 741         if (!vha->hw->tgt.tgt_ops)
 742                 return;
 743
 744         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 745         if (tgt->tgt_stop) {
 746                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 747                 return;
 748         }
 749
 750         if (fcport->disc_state == DSC_DELETE_PEND) {
 751                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 752                 return;
 753         }
 754
 755         if (!sess->se_sess) {
 756                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 757
 758                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 759                 sess = qlt_create_sess(vha, fcport, false);
 760                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 761
 762                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 763         } else {
 764                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 765                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 766                         return;
 767                 }
 768
 769                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 770                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 771                             "%s: kref_get fail sess %8phC \n",
 772                             __func__, sess->port_name);
 773                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 774                         return;
 775                 }
 776
 777                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 778                     "qla_target(%u): %ssession for port %8phC "
 779                     "(loop ID %d) reappeared\n", vha->vp_idx,
 780                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 781
 782                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 783                     "Reappeared sess %p\n", sess);
 784
 785                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 786                     fcport->loop_id,
 787                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 788         }
 789
 790         if (sess && sess->local) {
 791                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 792                     "qla_target(%u): local session for "
 793                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 794                     fcport->port_name, sess->loop_id);
 795                 sess->local = 0;
 796         }
 797         ha->tgt.tgt_ops->put_sess(sess);
 798         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 799 }
 800
 801 /*
 802  * This is a zero-base ref-counting solution, since hardware_lock
 803  * guarantees that ref_count is not modified concurrently.
 804  * Upon successful return content of iocb is undefined
 805  */
 806 static struct qlt_plogi_ack_t *
 807 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 808                        struct imm_ntfy_from_isp *iocb)
 809 {
 810         struct qlt_plogi_ack_t *pla;
 811
 812         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 813                 if (pla->id.b24 == id->b24) {
 814                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 815                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 816                         return pla;
 817                 }
 818         }
 819
 820         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 821         if (!pla) {
 822                 ql_dbg(ql_dbg_async, vha, 0x5088,
 823                        "qla_target(%d): Allocation of plogi_ack failed\n",
 824                        vha->vp_idx);
 825                 return NULL;
 826         }
 827
 828         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 829         pla->id = *id;
 830         list_add_tail(&pla->list, &vha->plogi_ack_list);
 831
 832         return pla;
 833 }
 834
 835 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 836     struct qlt_plogi_ack_t *pla)
 837 {
 838         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 839         port_id_t port_id;
 840         uint16_t loop_id;
 841         fc_port_t *fcport = pla->fcport;
 842
 843         BUG_ON(!pla->ref_count);
 844         pla->ref_count--;
 845
 846         if (pla->ref_count)
 847                 return;
 848
 849         ql_dbg(ql_dbg_disc, vha, 0x5089,
 850             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 851             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 852             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 853             iocb->u.isp24.port_id[0],
 854             le16_to_cpu(iocb->u.isp24.nport_handle),
 855             iocb->u.isp24.exchange_address, iocb->ox_id);
 856
 857         port_id.b.domain = iocb->u.isp24.port_id[2];
 858         port_id.b.area   = iocb->u.isp24.port_id[1];
 859         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 860         port_id.b.rsvd_1 = 0;
 861
 862         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 863
 864         fcport->loop_id = loop_id;
 865         fcport->d_id = port_id;
 866         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 867                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 868         else
 869                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 870
 871         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 872                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 873                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 874                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 875                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 876         }
 877
 878         list_del(&pla->list);
 879         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 880 }
 881
 882 void
 883 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 884     struct fc_port *sess, enum qlt_plogi_link_t link)
 885 {
 886         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 887         /* Inc ref_count first because link might already be pointing at pla */
 888         pla->ref_count++;
 889
 890         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 891                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 892                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 893                 sess, link, sess->port_name,
 894                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 895                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 896                 pla->ref_count, pla, link);
 897
 898         if (link == QLT_PLOGI_LINK_CONFLICT) {
 899                 switch (sess->disc_state) {
 900                 case DSC_DELETED:
 901                 case DSC_DELETE_PEND:
 902                         pla->ref_count--;
 903                         return;
 904                 default:
 905                         break;
 906                 }
 907         }
 908
 909         if (sess->plogi_link[link])
 910                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 911
 912         if (link == QLT_PLOGI_LINK_SAME_WWN)
 913                 pla->fcport = sess;
 914
 915         sess->plogi_link[link] = pla;
 916 }
 917
 918 typedef struct {
 919         /* These fields must be initialized by the caller */
 920         port_id_t id;
 921         /*
 922          * number of cmds dropped while we were waiting for
 923          * initiator to ack LOGO initialize to 1 if LOGO is
 924          * triggered by a command, otherwise, to 0
 925          */
 926         int cmd_count;
 927
 928         /* These fields are used by callee */
 929         struct list_head list;
 930 } qlt_port_logo_t;
 931
 932 static void
 933 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 934 {
 935         qlt_port_logo_t *tmp;
 936         int res;
 937
 938         mutex_lock(&vha->vha_tgt.tgt_mutex);
 939
 940         list_for_each_entry(tmp, &vha->logo_list, list) {
 941                 if (tmp->id.b24 == logo->id.b24) {
 942                         tmp->cmd_count += logo->cmd_count;
 943                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 944                         return;
 945                 }
 946         }
 947
 948         list_add_tail(&logo->list, &vha->logo_list);
 949
 950         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 951
 952         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 953
 954         mutex_lock(&vha->vha_tgt.tgt_mutex);
 955         list_del(&logo->list);
 956         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 957
 958         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 959             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 960             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 961             logo->cmd_count, res);
 962 }
 963
 964 static void qlt_free_session_done(struct work_struct *work)
 965 {
 966         struct fc_port *sess = container_of(work, struct fc_port,
 967             free_work);
 968         struct qla_tgt *tgt = sess->tgt;
 969         struct scsi_qla_host *vha = sess->vha;
 970         struct qla_hw_data *ha = vha->hw;
 971         unsigned long flags;
 972         bool logout_started = false;
 973         scsi_qla_host_t *base_vha;
 974         struct qlt_plogi_ack_t *own =
 975                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 976
 977         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 978                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 979                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 980                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 981                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 982                 sess->logout_on_delete, sess->keep_nport_handle,
 983                 sess->send_els_logo);
 984
 985         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 986                 if (sess->send_els_logo) {
 987                         qlt_port_logo_t logo;
 988
 989                         logo.id = sess->d_id;
 990                         logo.cmd_count = 0;
 991                         sess->send_els_logo = 0;
 992                         qlt_send_first_logo(vha, &logo);
 993                 }
 994
 995                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 996                         int rc;
 997
 998                         if (!own ||
 999                             (own &&
1000                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
1001                                 rc = qla2x00_post_async_logout_work(vha, sess,
1002                                     NULL);
1003                                 if (rc != QLA_SUCCESS)
1004                                         ql_log(ql_log_warn, vha, 0xf085,
1005                                             "Schedule logo failed sess %p rc %d\n",
1006                                             sess, rc);
1007                                 else
1008                                         logout_started = true;
1009                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1010                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1011                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1012                                     NULL);
1013                                 if (rc != QLA_SUCCESS)
1014                                         ql_log(ql_log_warn, vha, 0xf085,
1015                                             "Schedule PRLO failed sess %p rc %d\n",
1016                                             sess, rc);
1017                                 else
1018                                         logout_started = true;
1019                         }
1020                 }
1021         }
1022
1023         /*
1024          * Release the target session for FC Nexus from fabric module code.
1025          */
1026         if (sess->se_sess != NULL)
1027                 ha->tgt.tgt_ops->free_session(sess);
1028
1029         if (logout_started) {
1030                 bool traced = false;
1031
1032                 while (!READ_ONCE(sess->logout_completed)) {
1033                         if (!traced) {
1034                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1035                                         "%s: waiting for sess %p logout\n",
1036                                         __func__, sess);
1037                                 traced = true;
1038                         }
1039                         msleep(100);
1040                 }
1041
1042                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1043                     "%s: sess %p logout completed\n", __func__, sess);
1044         }
1045
1046         if (sess->logo_ack_needed) {
1047                 sess->logo_ack_needed = 0;
1048                 qla24xx_async_notify_ack(vha, sess,
1049                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1050         }
1051
1052         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1053         if (sess->se_sess) {
1054                 sess->se_sess = NULL;
1055                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1056                         tgt->sess_count--;
1057         }
1058
1059         sess->disc_state = DSC_DELETED;
1060         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1061         sess->deleted = QLA_SESS_DELETED;
1062         sess->login_retry = vha->hw->login_retry_count;
1063
1064         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1065                 vha->fcport_count--;
1066                 sess->login_succ = 0;
1067         }
1068
1069         qla2x00_clear_loop_id(sess);
1070
1071         if (sess->conflict) {
1072                 sess->conflict->login_pause = 0;
1073                 sess->conflict = NULL;
1074                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1075                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1076         }
1077
1078         {
1079                 struct qlt_plogi_ack_t *con =
1080                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1081                 struct imm_ntfy_from_isp *iocb;
1082
1083                 if (con) {
1084                         iocb = &con->iocb;
1085                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1086                                  "se_sess %p / sess %p port %8phC is gone,"
1087                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1088                                  sess->se_sess, sess, sess->port_name,
1089                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1090                                  own ? own->ref_count : -1,
1091                                  iocb->u.isp24.port_name, con->ref_count);
1092                         qlt_plogi_ack_unref(vha, con);
1093                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1094                 } else {
1095                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1096                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1097                             sess->se_sess, sess, sess->port_name,
1098                             own ? "releasing own PLOGI" :
1099                             "no own PLOGI pending",
1100                             own ? own->ref_count : -1);
1101                 }
1102
1103                 if (own) {
1104                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1105                         qlt_plogi_ack_unref(vha, own);
1106                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1107                 }
1108         }
1109
1110         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1111
1112         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1113             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1114                 sess, sess->port_name, vha->fcport_count);
1115
1116         if (tgt && (tgt->sess_count == 0))
1117                 wake_up_all(&tgt->waitQ);
1118
1119         if (vha->fcport_count == 0)
1120                 wake_up_all(&vha->fcport_waitQ);
1121
1122         base_vha = pci_get_drvdata(ha->pdev);
1123
1124         sess->free_pending = 0;
1125
1126         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1127                 return;
1128
1129         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1130                 switch (vha->host->active_mode) {
1131                 case MODE_INITIATOR:
1132                 case MODE_DUAL:
1133                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1134                         qla2xxx_wake_dpc(vha);
1135                         break;
1136                 case MODE_TARGET:
1137                 default:
1138                         /* no-op */
1139                         break;
1140                 }
1141         }
1142 }
1143
1144 /* ha->tgt.sess_lock supposed to be held on entry */
1145 void qlt_unreg_sess(struct fc_port *sess)
1146 {
1147         struct scsi_qla_host *vha = sess->vha;
1148         unsigned long flags;
1149
1150         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1151             "%s sess %p for deletion %8phC\n",
1152             __func__, sess, sess->port_name);
1153
1154         spin_lock_irqsave(&sess->vha->work_lock, flags);
1155         if (sess->free_pending) {
1156                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1157                 return;
1158         }
1159         sess->free_pending = 1;
1160         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1161
1162         if (sess->se_sess)
1163                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1164
1165         qla2x00_mark_device_lost(vha, sess, 1, 1);
1166
1167         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1168         sess->disc_state = DSC_DELETE_PEND;
1169         sess->last_rscn_gen = sess->rscn_gen;
1170         sess->last_login_gen = sess->login_gen;
1171
1172         if (sess->nvme_flag & NVME_FLAG_REGISTERED)
1173                 schedule_work(&sess->nvme_del_work);
1174
1175         INIT_WORK(&sess->free_work, qlt_free_session_done);
1176         schedule_work(&sess->free_work);
1177 }
1178 EXPORT_SYMBOL(qlt_unreg_sess);
1179
1180 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1181 {
1182         struct qla_hw_data *ha = vha->hw;
1183         struct fc_port *sess = NULL;
1184         uint16_t loop_id;
1185         int res = 0;
1186         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1187         unsigned long flags;
1188
1189         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1190         if (loop_id == 0xFFFF) {
1191                 /* Global event */
1192                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1193                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1194                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1195                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1196         } else {
1197                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1198                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1199                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1200         }
1201
1202         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1203             "Using sess for qla_tgt_reset: %p\n", sess);
1204         if (!sess) {
1205                 res = -ESRCH;
1206                 return res;
1207         }
1208
1209         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1210             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1211             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1212             mcmd, loop_id);
1213
1214         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1215 }
1216
1217 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1218 {
1219         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1220                 sess->logout_on_delete = 0;
1221                 sess->logo_ack_needed = 0;
1222                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1223                 sess->scan_state = 0;
1224         }
1225 }
1226
1227 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1228 {
1229         struct qla_tgt *tgt = sess->tgt;
1230         struct qla_hw_data *ha = sess->vha->hw;
1231         unsigned long flags;
1232
1233         if (sess->disc_state == DSC_DELETE_PEND)
1234                 return;
1235
1236         if (sess->disc_state == DSC_DELETED) {
1237                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1238                         wake_up_all(&tgt->waitQ);
1239                 if (sess->vha->fcport_count == 0)
1240                         wake_up_all(&sess->vha->fcport_waitQ);
1241
1242                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1243                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1244                         return;
1245         }
1246
1247         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1248         if (sess->deleted == QLA_SESS_DELETED)
1249                 sess->logout_on_delete = 0;
1250
1251         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1252                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1253                 return;
1254         }
1255         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1256         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1257
1258         sess->disc_state = DSC_DELETE_PEND;
1259
1260         qla24xx_chk_fcp_state(sess);
1261
1262         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1263             "Scheduling sess %p for deletion\n", sess);
1264
1265         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1266         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1267 }
1268
1269 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1270 {
1271         struct fc_port *sess;
1272         scsi_qla_host_t *vha = tgt->vha;
1273
1274         list_for_each_entry(sess, &vha->vp_fcports, list) {
1275                 if (sess->se_sess)
1276                         qlt_schedule_sess_for_deletion(sess);
1277         }
1278
1279         /* At this point tgt could be already dead */
1280 }
1281
1282 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1283         uint16_t *loop_id)
1284 {
1285         struct qla_hw_data *ha = vha->hw;
1286         dma_addr_t gid_list_dma;
1287         struct gid_list_info *gid_list;
1288         char *id_iter;
1289         int res, rc, i;
1290         uint16_t entries;
1291
1292         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1293             &gid_list_dma, GFP_KERNEL);
1294         if (!gid_list) {
1295                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1296                     "qla_target(%d): DMA Alloc failed of %u\n",
1297                     vha->vp_idx, qla2x00_gid_list_size(ha));
1298                 return -ENOMEM;
1299         }
1300
1301         /* Get list of logged in devices */
1302         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1303         if (rc != QLA_SUCCESS) {
1304                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1305                     "qla_target(%d): get_id_list() failed: %x\n",
1306                     vha->vp_idx, rc);
1307                 res = -EBUSY;
1308                 goto out_free_id_list;
1309         }
1310
1311         id_iter = (char *)gid_list;
1312         res = -ENOENT;
1313         for (i = 0; i < entries; i++) {
1314                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1315                 if ((gid->al_pa == s_id[2]) &&
1316                     (gid->area == s_id[1]) &&
1317                     (gid->domain == s_id[0])) {
1318                         *loop_id = le16_to_cpu(gid->loop_id);
1319                         res = 0;
1320                         break;
1321                 }
1322                 id_iter += ha->gid_list_info_size;
1323         }
1324
1325 out_free_id_list:
1326         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1327             gid_list, gid_list_dma);
1328         return res;
1329 }
1330
1331 /*
1332  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1333  * Caller must put it.
1334  */
1335 static struct fc_port *qlt_create_sess(
1336         struct scsi_qla_host *vha,
1337         fc_port_t *fcport,
1338         bool local)
1339 {
1340         struct qla_hw_data *ha = vha->hw;
1341         struct fc_port *sess = fcport;
1342         unsigned long flags;
1343
1344         if (vha->vha_tgt.qla_tgt->tgt_stop)
1345                 return NULL;
1346
1347         if (fcport->se_sess) {
1348                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1349                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1350                             "%s: kref_get_unless_zero failed for %8phC\n",
1351                             __func__, sess->port_name);
1352                         return NULL;
1353                 }
1354                 return fcport;
1355         }
1356         sess->tgt = vha->vha_tgt.qla_tgt;
1357         sess->local = local;
1358
1359         /*
1360          * Under normal circumstances we want to logout from firmware when
1361          * session eventually ends and release corresponding nport handle.
1362          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1363          * code will adjust these flags as necessary.
1364          */
1365         sess->logout_on_delete = 1;
1366         sess->keep_nport_handle = 0;
1367         sess->logout_completed = 0;
1368
1369         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1370             &fcport->port_name[0], sess) < 0) {
1371                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1372                     "(%d) %8phC check_initiator_node_acl failed\n",
1373                     vha->vp_idx, fcport->port_name);
1374                 return NULL;
1375         } else {
1376                 kref_init(&fcport->sess_kref);
1377                 /*
1378                  * Take an extra reference to ->sess_kref here to handle
1379                  * fc_port access across ->tgt.sess_lock reaquire.
1380                  */
1381                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1382                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1383                             "%s: kref_get_unless_zero failed for %8phC\n",
1384                             __func__, sess->port_name);
1385                         return NULL;
1386                 }
1387
1388                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1389                 if (!IS_SW_RESV_ADDR(sess->d_id))
1390                         vha->vha_tgt.qla_tgt->sess_count++;
1391
1392                 qlt_do_generation_tick(vha, &sess->generation);
1393                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1394         }
1395
1396         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1397             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1398             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1399             vha->vha_tgt.qla_tgt->sess_count);
1400
1401         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1402             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1403             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1404             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1405             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1406             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1407
1408         return sess;
1409 }
1410
1411 /*
1412  * max_gen - specifies maximum session generation
1413  * at which this deletion requestion is still valid
1414  */
1415 void
1416 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1417 {
1418         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1419         struct fc_port *sess = fcport;
1420         unsigned long flags;
1421
1422         if (!vha->hw->tgt.tgt_ops)
1423                 return;
1424
1425         if (!tgt)
1426                 return;
1427
1428         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1429         if (tgt->tgt_stop) {
1430                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1431                 return;
1432         }
1433         if (!sess->se_sess) {
1434                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1435                 return;
1436         }
1437
1438         if (max_gen - sess->generation < 0) {
1439                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1440                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1441                     "Ignoring stale deletion request for se_sess %p / sess %p"
1442                     " for port %8phC, req_gen %d, sess_gen %d\n",
1443                     sess->se_sess, sess, sess->port_name, max_gen,
1444                     sess->generation);
1445                 return;
1446         }
1447
1448         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1449
1450         sess->local = 1;
1451         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1452         qlt_schedule_sess_for_deletion(sess);
1453 }
1454
1455 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1456 {
1457         struct qla_hw_data *ha = tgt->ha;
1458         unsigned long flags;
1459         int res;
1460         /*
1461          * We need to protect against race, when tgt is freed before or
1462          * inside wake_up()
1463          */
1464         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1465         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1466             "tgt %p, sess_count=%d\n",
1467             tgt, tgt->sess_count);
1468         res = (tgt->sess_count == 0);
1469         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1470
1471         return res;
1472 }
1473
1474 /* Called by tcm_qla2xxx configfs code */
1475 int qlt_stop_phase1(struct qla_tgt *tgt)
1476 {
1477         struct scsi_qla_host *vha = tgt->vha;
1478         struct qla_hw_data *ha = tgt->ha;
1479         unsigned long flags;
1480
1481         mutex_lock(&qla_tgt_mutex);
1482         if (!vha->fc_vport) {
1483                 struct Scsi_Host *sh = vha->host;
1484                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1485                 bool npiv_vports;
1486
1487                 spin_lock_irqsave(sh->host_lock, flags);
1488                 npiv_vports = (fc_host->npiv_vports_inuse);
1489                 spin_unlock_irqrestore(sh->host_lock, flags);
1490
1491                 if (npiv_vports) {
1492                         mutex_unlock(&qla_tgt_mutex);
1493                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1494                             "NPIV is in use. Can not stop target\n");
1495                         return -EPERM;
1496                 }
1497         }
1498         if (tgt->tgt_stop || tgt->tgt_stopped) {
1499                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1500                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1501                 mutex_unlock(&qla_tgt_mutex);
1502                 return -EPERM;
1503         }
1504
1505         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1506             vha->host_no, vha);
1507         /*
1508          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1509          * Lock is needed, because we still can get an incoming packet.
1510          */
1511         mutex_lock(&vha->vha_tgt.tgt_mutex);
1512         tgt->tgt_stop = 1;
1513         qlt_clear_tgt_db(tgt);
1514         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1515         mutex_unlock(&qla_tgt_mutex);
1516
1517         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1518             "Waiting for sess works (tgt %p)", tgt);
1519         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1520         while (!list_empty(&tgt->sess_works_list)) {
1521                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1522                 flush_scheduled_work();
1523                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1524         }
1525         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1526
1527         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1528             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1529
1530         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1531
1532         /* Big hammer */
1533         if (!ha->flags.host_shutting_down &&
1534             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1535                 qlt_disable_vha(vha);
1536
1537         /* Wait for sessions to clear out (just in case) */
1538         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1539         return 0;
1540 }
1541 EXPORT_SYMBOL(qlt_stop_phase1);
1542
1543 /* Called by tcm_qla2xxx configfs code */
1544 void qlt_stop_phase2(struct qla_tgt *tgt)
1545 {
1546         scsi_qla_host_t *vha = tgt->vha;
1547
1548         if (tgt->tgt_stopped) {
1549                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1550                     "Already in tgt->tgt_stopped state\n");
1551                 dump_stack();
1552                 return;
1553         }
1554         if (!tgt->tgt_stop) {
1555                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1556                     "%s: phase1 stop is not completed\n", __func__);
1557                 dump_stack();
1558                 return;
1559         }
1560
1561         mutex_lock(&vha->vha_tgt.tgt_mutex);
1562         tgt->tgt_stop = 0;
1563         tgt->tgt_stopped = 1;
1564         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1565
1566         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1567             tgt);
1568 }
1569 EXPORT_SYMBOL(qlt_stop_phase2);
1570
1571 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1572 static void qlt_release(struct qla_tgt *tgt)
1573 {
1574         scsi_qla_host_t *vha = tgt->vha;
1575         void *node;
1576         u64 key = 0;
1577         u16 i;
1578         struct qla_qpair_hint *h;
1579         struct qla_hw_data *ha = vha->hw;
1580
1581         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1582             !tgt->tgt_stopped)
1583                 qlt_stop_phase1(tgt);
1584
1585         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1586                 qlt_stop_phase2(tgt);
1587
1588         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1589                 unsigned long flags;
1590
1591                 h = &tgt->qphints[i];
1592                 if (h->qpair) {
1593                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1594                         list_del(&h->hint_elem);
1595                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1596                         h->qpair = NULL;
1597                 }
1598         }
1599         kfree(tgt->qphints);
1600         mutex_lock(&qla_tgt_mutex);
1601         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1602         mutex_unlock(&qla_tgt_mutex);
1603
1604         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1605                 btree_remove64(&tgt->lun_qpair_map, key);
1606
1607         btree_destroy64(&tgt->lun_qpair_map);
1608
1609         if (vha->vp_idx)
1610                 if (ha->tgt.tgt_ops &&
1611                     ha->tgt.tgt_ops->remove_target &&
1612                     vha->vha_tgt.target_lport_ptr)
1613                         ha->tgt.tgt_ops->remove_target(vha);
1614
1615         vha->vha_tgt.qla_tgt = NULL;
1616
1617         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1618             "Release of tgt %p finished\n", tgt);
1619
1620         kfree(tgt);
1621 }
1622
1623 /* ha->hardware_lock supposed to be held on entry */
1624 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1625         const void *param, unsigned int param_size)
1626 {
1627         struct qla_tgt_sess_work_param *prm;
1628         unsigned long flags;
1629
1630         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1631         if (!prm) {
1632                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1633                     "qla_target(%d): Unable to create session "
1634                     "work, command will be refused", 0);
1635                 return -ENOMEM;
1636         }
1637
1638         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1639             "Scheduling work (type %d, prm %p)"
1640             " to find session for param %p (size %d, tgt %p)\n",
1641             type, prm, param, param_size, tgt);
1642
1643         prm->type = type;
1644         memcpy(&prm->tm_iocb, param, param_size);
1645
1646         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1647         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1648         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1649
1650         schedule_work(&tgt->sess_work);
1651
1652         return 0;
1653 }
1654
1655 /*
1656  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1657  */
1658 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1659         struct imm_ntfy_from_isp *ntfy,
1660         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1661         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1662 {
1663         struct scsi_qla_host *vha = qpair->vha;
1664         struct qla_hw_data *ha = vha->hw;
1665         request_t *pkt;
1666         struct nack_to_isp *nack;
1667
1668         if (!ha->flags.fw_started)
1669                 return;
1670
1671         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1672
1673         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1674         if (!pkt) {
1675                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1676                     "qla_target(%d): %s failed: unable to allocate "
1677                     "request packet\n", vha->vp_idx, __func__);
1678                 return;
1679         }
1680
1681         if (vha->vha_tgt.qla_tgt != NULL)
1682                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1683
1684         pkt->entry_type = NOTIFY_ACK_TYPE;
1685         pkt->entry_count = 1;
1686
1687         nack = (struct nack_to_isp *)pkt;
1688         nack->ox_id = ntfy->ox_id;
1689
1690         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1691         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1692         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1693                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1694                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1695         }
1696         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1697         nack->u.isp24.status = ntfy->u.isp24.status;
1698         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1699         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1700         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1701         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1702         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1703         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1704         nack->u.isp24.srr_reject_code = srr_reject_code;
1705         nack->u.isp24.srr_reject_code_expl = srr_explan;
1706         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1707
1708         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1709             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1710             vha->vp_idx, nack->u.isp24.status);
1711
1712         /* Memory Barrier */
1713         wmb();
1714         qla2x00_start_iocbs(vha, qpair->req);
1715 }
1716
1717 /*
1718  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1719  */
1720 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1721         struct abts_recv_from_24xx *abts, uint32_t status,
1722         bool ids_reversed)
1723 {
1724         struct scsi_qla_host *vha = qpair->vha;
1725         struct qla_hw_data *ha = vha->hw;
1726         struct abts_resp_to_24xx *resp;
1727         uint32_t f_ctl;
1728         uint8_t *p;
1729
1730         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1731             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1732             ha, abts, status);
1733
1734         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1735             NULL);
1736         if (!resp) {
1737                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1738                     "qla_target(%d): %s failed: unable to allocate "
1739                     "request packet", vha->vp_idx, __func__);
1740                 return;
1741         }
1742
1743         resp->entry_type = ABTS_RESP_24XX;
1744         resp->entry_count = 1;
1745         resp->nport_handle = abts->nport_handle;
1746         resp->vp_index = vha->vp_idx;
1747         resp->sof_type = abts->sof_type;
1748         resp->exchange_address = abts->exchange_address;
1749         resp->fcp_hdr_le = abts->fcp_hdr_le;
1750         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1751             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1752             F_CTL_SEQ_INITIATIVE);
1753         p = (uint8_t *)&f_ctl;
1754         resp->fcp_hdr_le.f_ctl[0] = *p++;
1755         resp->fcp_hdr_le.f_ctl[1] = *p++;
1756         resp->fcp_hdr_le.f_ctl[2] = *p;
1757         if (ids_reversed) {
1758                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1759                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1760                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1761                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1762                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1763                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1764         } else {
1765                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1766                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1767                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1768                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1769                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1770                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1771         }
1772         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1773         if (status == 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
1797 /*
1798  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1799  */
1800 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1801         struct abts_resp_from_24xx_fw *entry)
1802 {
1803         struct ctio7_to_24xx *ctio;
1804
1805         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1806             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1807
1808         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1809             vha->hw->base_qpair, NULL);
1810         if (ctio == NULL) {
1811                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1812                     "qla_target(%d): %s failed: unable to allocate "
1813                     "request packet\n", vha->vp_idx, __func__);
1814                 return;
1815         }
1816
1817         /*
1818          * We've got on entrance firmware's response on by us generated
1819          * ABTS response. So, in it ID fields are reversed.
1820          */
1821
1822         ctio->entry_type = CTIO_TYPE7;
1823         ctio->entry_count = 1;
1824         ctio->nport_handle = entry->nport_handle;
1825         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1826         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1827         ctio->vp_index = vha->vp_idx;
1828         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1829         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1830         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1831         ctio->exchange_addr = entry->exchange_addr_to_abort;
1832         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1833                                             CTIO7_FLAGS_TERMINATE);
1834         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1835
1836         /* Memory Barrier */
1837         wmb();
1838         qla2x00_start_iocbs(vha, vha->req);
1839
1840         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1841             (struct abts_recv_from_24xx *)entry,
1842             FCP_TMF_CMPL, true);
1843 }
1844
1845 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1846 {
1847         struct qla_tgt_sess_op *op;
1848         struct qla_tgt_cmd *cmd;
1849         unsigned long flags;
1850
1851         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1852         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1853                 if (tag == op->atio.u.isp24.exchange_addr) {
1854                         op->aborted = true;
1855                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1856                         return 1;
1857                 }
1858         }
1859
1860         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1861                 if (tag == op->atio.u.isp24.exchange_addr) {
1862                         op->aborted = true;
1863                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1864                         return 1;
1865                 }
1866         }
1867
1868         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1869                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1870                         cmd->aborted = 1;
1871                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1872                         return 1;
1873                 }
1874         }
1875         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1876
1877         return 0;
1878 }
1879
1880 /* drop cmds for the given lun
1881  * XXX only looks for cmds on the port through which lun reset was recieved
1882  * XXX does not go through the list of other port (which may have cmds
1883  *     for the same lun)
1884  */
1885 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1886                                 u64 lun, uint8_t *s_id)
1887 {
1888         struct qla_tgt_sess_op *op;
1889         struct qla_tgt_cmd *cmd;
1890         uint32_t key;
1891         unsigned long flags;
1892
1893         key = sid_to_key(s_id);
1894         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1895         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1896                 uint32_t op_key;
1897                 u64 op_lun;
1898
1899                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1900                 op_lun = scsilun_to_int(
1901                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1902                 if (op_key == key && op_lun == lun)
1903                         op->aborted = true;
1904         }
1905
1906         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1907                 uint32_t op_key;
1908                 u64 op_lun;
1909
1910                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1911                 op_lun = scsilun_to_int(
1912                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1913                 if (op_key == key && op_lun == lun)
1914                         op->aborted = true;
1915         }
1916
1917         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1918                 uint32_t cmd_key;
1919                 u64 cmd_lun;
1920
1921                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1922                 cmd_lun = scsilun_to_int(
1923                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1924                 if (cmd_key == key && cmd_lun == lun)
1925                         cmd->aborted = 1;
1926         }
1927         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1928 }
1929
1930 /* ha->hardware_lock supposed to be held on entry */
1931 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1932         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1933 {
1934         struct qla_hw_data *ha = vha->hw;
1935         struct qla_tgt_mgmt_cmd *mcmd;
1936         int rc;
1937
1938         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1939                 /* send TASK_ABORT response immediately */
1940                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1941                 return 0;
1942         }
1943
1944         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1945             "qla_target(%d): task abort (tag=%d)\n",
1946             vha->vp_idx, abts->exchange_addr_to_abort);
1947
1948         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1949         if (mcmd == NULL) {
1950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1951                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1952                     vha->vp_idx, __func__);
1953                 return -ENOMEM;
1954         }
1955         memset(mcmd, 0, sizeof(*mcmd));
1956
1957         mcmd->sess = sess;
1958         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1959         mcmd->reset_count = ha->base_qpair->chip_reset;
1960         mcmd->tmr_func = QLA_TGT_ABTS;
1961         mcmd->qpair = ha->base_qpair;
1962         mcmd->vha = vha;
1963
1964         /*
1965          * LUN is looked up by target-core internally based on the passed
1966          * abts->exchange_addr_to_abort tag.
1967          */
1968         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1969             abts->exchange_addr_to_abort);
1970         if (rc != 0) {
1971                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1972                     "qla_target(%d):  tgt_ops->handle_tmr()"
1973                     " failed: %d", vha->vp_idx, rc);
1974                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1975                 return -EFAULT;
1976         }
1977
1978         return 0;
1979 }
1980
1981 /*
1982  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1983  */
1984 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1985         struct abts_recv_from_24xx *abts)
1986 {
1987         struct qla_hw_data *ha = vha->hw;
1988         struct fc_port *sess;
1989         uint32_t tag = abts->exchange_addr_to_abort;
1990         uint8_t s_id[3];
1991         int rc;
1992         unsigned long flags;
1993
1994         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1995                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1996                     "qla_target(%d): ABTS: Abort Sequence not "
1997                     "supported\n", vha->vp_idx);
1998                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1999                     false);
2000                 return;
2001         }
2002
2003         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2004                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2005                     "qla_target(%d): ABTS: Unknown Exchange "
2006                     "Address received\n", vha->vp_idx);
2007                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2008                     false);
2009                 return;
2010         }
2011
2012         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2013             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2014             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2015             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2016             le32_to_cpu(abts->fcp_hdr_le.parameter));
2017
2018         s_id[0] = abts->fcp_hdr_le.s_id[2];
2019         s_id[1] = abts->fcp_hdr_le.s_id[1];
2020         s_id[2] = abts->fcp_hdr_le.s_id[0];
2021
2022         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2023         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2024         if (!sess) {
2025                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2026                     "qla_target(%d): task abort for non-existant session\n",
2027                     vha->vp_idx);
2028                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2029
2030                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2031                             false);
2032                 return;
2033         }
2034         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2035
2036
2037         if (sess->deleted) {
2038                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2039                     false);
2040                 return;
2041         }
2042
2043         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2044         if (rc != 0) {
2045                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2046                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2047                     vha->vp_idx, rc);
2048                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2049                     false);
2050                 return;
2051         }
2052 }
2053
2054 /*
2055  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2056  */
2057 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2058         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2059 {
2060         struct scsi_qla_host *ha = mcmd->vha;
2061         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2062         struct ctio7_to_24xx *ctio;
2063         uint16_t temp;
2064
2065         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2066             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2067             ha, atio, resp_code);
2068
2069
2070         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2071         if (ctio == NULL) {
2072                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2073                     "qla_target(%d): %s failed: unable to allocate "
2074                     "request packet\n", ha->vp_idx, __func__);
2075                 return;
2076         }
2077
2078         ctio->entry_type = CTIO_TYPE7;
2079         ctio->entry_count = 1;
2080         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2081         ctio->nport_handle = mcmd->sess->loop_id;
2082         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2083         ctio->vp_index = ha->vp_idx;
2084         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2085         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2086         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2087         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2088         temp = (atio->u.isp24.attr << 9)|
2089                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2090         ctio->u.status1.flags = cpu_to_le16(temp);
2091         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2092         ctio->u.status1.ox_id = cpu_to_le16(temp);
2093         ctio->u.status1.scsi_status =
2094             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2095         ctio->u.status1.response_len = cpu_to_le16(8);
2096         ctio->u.status1.sense_data[0] = resp_code;
2097
2098         /* Memory Barrier */
2099         wmb();
2100         if (qpair->reqq_start_iocbs)
2101                 qpair->reqq_start_iocbs(qpair);
2102         else
2103                 qla2x00_start_iocbs(ha, qpair->req);
2104 }
2105
2106 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2107 {
2108         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2109 }
2110 EXPORT_SYMBOL(qlt_free_mcmd);
2111
2112 /*
2113  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2114  * reacquire
2115  */
2116 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2117     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2118 {
2119         struct atio_from_isp *atio = &cmd->atio;
2120         struct ctio7_to_24xx *ctio;
2121         uint16_t temp;
2122         struct scsi_qla_host *vha = cmd->vha;
2123
2124         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2125             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2126             "sense_key=%02x, asc=%02x, ascq=%02x",
2127             vha, atio, scsi_status, sense_key, asc, ascq);
2128
2129         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2130         if (!ctio) {
2131                 ql_dbg(ql_dbg_async, vha, 0x3067,
2132                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2133                     vha->host_no, __func__);
2134                 goto out;
2135         }
2136
2137         ctio->entry_type = CTIO_TYPE7;
2138         ctio->entry_count = 1;
2139         ctio->handle = QLA_TGT_SKIP_HANDLE;
2140         ctio->nport_handle = cmd->sess->loop_id;
2141         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2142         ctio->vp_index = vha->vp_idx;
2143         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2144         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2145         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2146         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2147         temp = (atio->u.isp24.attr << 9) |
2148             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2149         ctio->u.status1.flags = cpu_to_le16(temp);
2150         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2151         ctio->u.status1.ox_id = cpu_to_le16(temp);
2152         ctio->u.status1.scsi_status =
2153             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2154         ctio->u.status1.response_len = cpu_to_le16(18);
2155         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2156
2157         if (ctio->u.status1.residual != 0)
2158                 ctio->u.status1.scsi_status |=
2159                     cpu_to_le16(SS_RESIDUAL_UNDER);
2160
2161         /* Response code and sense key */
2162         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2163             (&ctio->u.status1.sense_data)[0]);
2164         /* Additional sense length */
2165         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2166         /* ASC and ASCQ */
2167         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2168             (&ctio->u.status1.sense_data)[3]);
2169
2170         /* Memory Barrier */
2171         wmb();
2172
2173         if (qpair->reqq_start_iocbs)
2174                 qpair->reqq_start_iocbs(qpair);
2175         else
2176                 qla2x00_start_iocbs(vha, qpair->req);
2177
2178 out:
2179         return;
2180 }
2181
2182 /* callback from target fabric module code */
2183 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2184 {
2185         struct scsi_qla_host *vha = mcmd->sess->vha;
2186         struct qla_hw_data *ha = vha->hw;
2187         unsigned long flags;
2188         struct qla_qpair *qpair = mcmd->qpair;
2189
2190         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2191             "TM response mcmd (%p) status %#x state %#x",
2192             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2193
2194         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2195
2196         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2197                 /*
2198                  * Either the port is not online or this request was from
2199                  * previous life, just abort the processing.
2200                  */
2201                 ql_dbg(ql_dbg_async, vha, 0xe100,
2202                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2203                         vha->flags.online, qla2x00_reset_active(vha),
2204                         mcmd->reset_count, qpair->chip_reset);
2205                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2206                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2207                 return;
2208         }
2209
2210         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2211                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2212                     ELS_LOGO ||
2213                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2214                     ELS_PRLO ||
2215                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2216                     ELS_TPRLO) {
2217                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2218                             "TM response logo %phC status %#x state %#x",
2219                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2220                             mcmd->flags);
2221                         qlt_schedule_sess_for_deletion(mcmd->sess);
2222                 } else {
2223                         qlt_send_notify_ack(vha->hw->base_qpair,
2224                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2225                 }
2226         } else {
2227                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2228                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2229                             mcmd->fc_tm_rsp, false);
2230                 else
2231                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2232                             mcmd->fc_tm_rsp);
2233         }
2234         /*
2235          * Make the callback for ->free_mcmd() to queue_work() and invoke
2236          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2237          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2238          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2239          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2240          * qlt_xmit_tm_rsp() returns here..
2241          */
2242         ha->tgt.tgt_ops->free_mcmd(mcmd);
2243         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2244 }
2245 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2246
2247 /* No locks */
2248 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2249 {
2250         struct qla_tgt_cmd *cmd = prm->cmd;
2251
2252         BUG_ON(cmd->sg_cnt == 0);
2253
2254         prm->sg = (struct scatterlist *)cmd->sg;
2255         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2256             cmd->sg_cnt, cmd->dma_data_direction);
2257         if (unlikely(prm->seg_cnt == 0))
2258                 goto out_err;
2259
2260         prm->cmd->sg_mapped = 1;
2261
2262         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2263                 /*
2264                  * If greater than four sg entries then we need to allocate
2265                  * the continuation entries
2266                  */
2267                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2268                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2269                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2270                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2271         } else {
2272                 /* DIF */
2273                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2274                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2275                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2276                         prm->tot_dsds = prm->seg_cnt;
2277                 } else
2278                         prm->tot_dsds = prm->seg_cnt;
2279
2280                 if (cmd->prot_sg_cnt) {
2281                         prm->prot_sg      = cmd->prot_sg;
2282                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2283                                 cmd->prot_sg, cmd->prot_sg_cnt,
2284                                 cmd->dma_data_direction);
2285                         if (unlikely(prm->prot_seg_cnt == 0))
2286                                 goto out_err;
2287
2288                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2289                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2290                                 /* Dif Bundling not support here */
2291                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2292                                                                 cmd->blk_sz);
2293                                 prm->tot_dsds += prm->prot_seg_cnt;
2294                         } else
2295                                 prm->tot_dsds += prm->prot_seg_cnt;
2296                 }
2297         }
2298
2299         return 0;
2300
2301 out_err:
2302         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2303             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2304             0, prm->cmd->sg_cnt);
2305         return -1;
2306 }
2307
2308 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2309 {
2310         struct qla_hw_data *ha;
2311         struct qla_qpair *qpair;
2312         if (!cmd->sg_mapped)
2313                 return;
2314
2315         qpair = cmd->qpair;
2316
2317         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2318             cmd->dma_data_direction);
2319         cmd->sg_mapped = 0;
2320
2321         if (cmd->prot_sg_cnt)
2322                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2323                         cmd->dma_data_direction);
2324
2325         if (!cmd->ctx)
2326                 return;
2327         ha = vha->hw;
2328         if (cmd->ctx_dsd_alloced)
2329                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2330
2331         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2332 }
2333
2334 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2335         uint32_t req_cnt)
2336 {
2337         uint32_t cnt;
2338         struct req_que *req = qpair->req;
2339
2340         if (req->cnt < (req_cnt + 2)) {
2341                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2342                     RD_REG_DWORD_RELAXED(req->req_q_out));
2343
2344                 if  (req->ring_index < cnt)
2345                         req->cnt = cnt - req->ring_index;
2346                 else
2347                         req->cnt = req->length - (req->ring_index - cnt);
2348
2349                 if (unlikely(req->cnt < (req_cnt + 2)))
2350                         return -EAGAIN;
2351         }
2352
2353         req->cnt -= req_cnt;
2354
2355         return 0;
2356 }
2357
2358 /*
2359  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2360  */
2361 static inline void *qlt_get_req_pkt(struct req_que *req)
2362 {
2363         /* Adjust ring index. */
2364         req->ring_index++;
2365         if (req->ring_index == req->length) {
2366                 req->ring_index = 0;
2367                 req->ring_ptr = req->ring;
2368         } else {
2369                 req->ring_ptr++;
2370         }
2371         return (cont_entry_t *)req->ring_ptr;
2372 }
2373
2374 /* ha->hardware_lock supposed to be held on entry */
2375 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2376 {
2377         uint32_t h;
2378         int index;
2379         uint8_t found = 0;
2380         struct req_que *req = qpair->req;
2381
2382         h = req->current_outstanding_cmd;
2383
2384         for (index = 1; index < req->num_outstanding_cmds; index++) {
2385                 h++;
2386                 if (h == req->num_outstanding_cmds)
2387                         h = 1;
2388
2389                 if (h == QLA_TGT_SKIP_HANDLE)
2390                         continue;
2391
2392                 if (!req->outstanding_cmds[h]) {
2393                         found = 1;
2394                         break;
2395                 }
2396         }
2397
2398         if (found) {
2399                 req->current_outstanding_cmd = h;
2400         } else {
2401                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2402                     "qla_target(%d): Ran out of empty cmd slots\n",
2403                     qpair->vha->vp_idx);
2404                 h = QLA_TGT_NULL_HANDLE;
2405         }
2406
2407         return h;
2408 }
2409
2410 /* ha->hardware_lock supposed to be held on entry */
2411 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2412         struct qla_tgt_prm *prm)
2413 {
2414         uint32_t h;
2415         struct ctio7_to_24xx *pkt;
2416         struct atio_from_isp *atio = &prm->cmd->atio;
2417         uint16_t temp;
2418
2419         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2420         prm->pkt = pkt;
2421         memset(pkt, 0, sizeof(*pkt));
2422
2423         pkt->entry_type = CTIO_TYPE7;
2424         pkt->entry_count = (uint8_t)prm->req_cnt;
2425         pkt->vp_index = prm->cmd->vp_idx;
2426
2427         h = qlt_make_handle(qpair);
2428         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2429                 /*
2430                  * CTIO type 7 from the firmware doesn't provide a way to
2431                  * know the initiator's LOOP ID, hence we can't find
2432                  * the session and, so, the command.
2433                  */
2434                 return -EAGAIN;
2435         } else
2436                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2437
2438         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2439         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2440         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2441         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2442         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2443         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2444         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2445         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2446         temp = atio->u.isp24.attr << 9;
2447         pkt->u.status0.flags |= cpu_to_le16(temp);
2448         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2449         pkt->u.status0.ox_id = cpu_to_le16(temp);
2450         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2451
2452         return 0;
2453 }
2454
2455 /*
2456  * ha->hardware_lock supposed to be held on entry. We have already made sure
2457  * that there is sufficient amount of request entries to not drop it.
2458  */
2459 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2460 {
2461         int cnt;
2462         uint32_t *dword_ptr;
2463
2464         /* Build continuation packets */
2465         while (prm->seg_cnt > 0) {
2466                 cont_a64_entry_t *cont_pkt64 =
2467                         (cont_a64_entry_t *)qlt_get_req_pkt(
2468                            prm->cmd->qpair->req);
2469
2470                 /*
2471                  * Make sure that from cont_pkt64 none of
2472                  * 64-bit specific fields used for 32-bit
2473                  * addressing. Cast to (cont_entry_t *) for
2474                  * that.
2475                  */
2476
2477                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2478
2479                 cont_pkt64->entry_count = 1;
2480                 cont_pkt64->sys_define = 0;
2481
2482                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2483                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2484
2485                 /* Load continuation entry data segments */
2486                 for (cnt = 0;
2487                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2488                     cnt++, prm->seg_cnt--) {
2489                         *dword_ptr++ =
2490                             cpu_to_le32(pci_dma_lo32
2491                                 (sg_dma_address(prm->sg)));
2492                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2493                             (sg_dma_address(prm->sg)));
2494                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2495
2496                         prm->sg = sg_next(prm->sg);
2497                 }
2498         }
2499 }
2500
2501 /*
2502  * ha->hardware_lock supposed to be held on entry. We have already made sure
2503  * that there is sufficient amount of request entries to not drop it.
2504  */
2505 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2506 {
2507         int cnt;
2508         uint32_t *dword_ptr;
2509         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2510
2511         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2512
2513         /* Setup packet address segment pointer */
2514         dword_ptr = pkt24->u.status0.dseg_0_address;
2515
2516         /* Set total data segment count */
2517         if (prm->seg_cnt)
2518                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2519
2520         if (prm->seg_cnt == 0) {
2521                 /* No data transfer */
2522                 *dword_ptr++ = 0;
2523                 *dword_ptr = 0;
2524                 return;
2525         }
2526
2527         /* If scatter gather */
2528
2529         /* Load command entry data segments */
2530         for (cnt = 0;
2531             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2532             cnt++, prm->seg_cnt--) {
2533                 *dword_ptr++ =
2534                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2535
2536                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2537                         sg_dma_address(prm->sg)));
2538
2539                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2540
2541                 prm->sg = sg_next(prm->sg);
2542         }
2543
2544         qlt_load_cont_data_segments(prm);
2545 }
2546
2547 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2548 {
2549         return cmd->bufflen > 0;
2550 }
2551
2552 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2553 {
2554         struct qla_tgt_cmd *cmd;
2555         struct scsi_qla_host *vha;
2556
2557         /* asc 0x10=dif error */
2558         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2559                 cmd = prm->cmd;
2560                 vha = cmd->vha;
2561                 /* ASCQ */
2562                 switch (prm->sense_buffer[13]) {
2563                 case 1:
2564                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2565                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2566                             "se_cmd=%p tag[%x]",
2567                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2568                             cmd->atio.u.isp24.exchange_addr);
2569                         break;
2570                 case 2:
2571                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2572                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2573                             "se_cmd=%p tag[%x]",
2574                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2575                             cmd->atio.u.isp24.exchange_addr);
2576                         break;
2577                 case 3:
2578                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2579                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2580                             "se_cmd=%p tag[%x]",
2581                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2582                             cmd->atio.u.isp24.exchange_addr);
2583                         break;
2584                 default:
2585                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2586                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2587                             "se_cmd=%p tag[%x]",
2588                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2589                             cmd->atio.u.isp24.exchange_addr);
2590                         break;
2591                 }
2592                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2593         }
2594 }
2595
2596 /*
2597  * Called without ha->hardware_lock held
2598  */
2599 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2600         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2601         uint32_t *full_req_cnt)
2602 {
2603         struct se_cmd *se_cmd = &cmd->se_cmd;
2604         struct qla_qpair *qpair = cmd->qpair;
2605
2606         prm->cmd = cmd;
2607         prm->tgt = cmd->tgt;
2608         prm->pkt = NULL;
2609         prm->rq_result = scsi_status;
2610         prm->sense_buffer = &cmd->sense_buffer[0];
2611         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2612         prm->sg = NULL;
2613         prm->seg_cnt = -1;
2614         prm->req_cnt = 1;
2615         prm->residual = 0;
2616         prm->add_status_pkt = 0;
2617         prm->prot_sg = NULL;
2618         prm->prot_seg_cnt = 0;
2619         prm->tot_dsds = 0;
2620
2621         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2622                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2623                         return -EAGAIN;
2624         }
2625
2626         *full_req_cnt = prm->req_cnt;
2627
2628         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2629                 prm->residual = se_cmd->residual_count;
2630                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2631                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2632                        prm->residual, se_cmd->tag,
2633                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2634                        cmd->bufflen, prm->rq_result);
2635                 prm->rq_result |= SS_RESIDUAL_UNDER;
2636         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2637                 prm->residual = se_cmd->residual_count;
2638                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2639                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2640                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2641                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2642                 prm->rq_result |= SS_RESIDUAL_OVER;
2643         }
2644
2645         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2646                 /*
2647                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2648                  * ignored in *xmit_response() below
2649                  */
2650                 if (qlt_has_data(cmd)) {
2651                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2652                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2653                             (prm->rq_result != 0))) {
2654                                 prm->add_status_pkt = 1;
2655                                 (*full_req_cnt)++;
2656                         }
2657                 }
2658         }
2659
2660         return 0;
2661 }
2662
2663 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2664     int sending_sense)
2665 {
2666         if (cmd->qpair->enable_class_2)
2667                 return 0;
2668
2669         if (sending_sense)
2670                 return cmd->conf_compl_supported;
2671         else
2672                 return cmd->qpair->enable_explicit_conf &&
2673                     cmd->conf_compl_supported;
2674 }
2675
2676 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2677         struct qla_tgt_prm *prm)
2678 {
2679         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2680             (uint32_t)sizeof(ctio->u.status1.sense_data));
2681         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2682         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2683                 ctio->u.status0.flags |= cpu_to_le16(
2684                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2685                     CTIO7_FLAGS_CONFORM_REQ);
2686         }
2687         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2688         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2689         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2690                 int i;
2691
2692                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2693                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2694                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2695                                     "Skipping EXPLICIT_CONFORM and "
2696                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2697                                     "non GOOD status\n");
2698                                 goto skip_explict_conf;
2699                         }
2700                         ctio->u.status1.flags |= cpu_to_le16(
2701                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2702                             CTIO7_FLAGS_CONFORM_REQ);
2703                 }
2704 skip_explict_conf:
2705                 ctio->u.status1.flags &=
2706                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2707                 ctio->u.status1.flags |=
2708                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2709                 ctio->u.status1.scsi_status |=
2710                     cpu_to_le16(SS_SENSE_LEN_VALID);
2711                 ctio->u.status1.sense_length =
2712                     cpu_to_le16(prm->sense_buffer_len);
2713                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2714                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2715                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2716
2717                 qlt_print_dif_err(prm);
2718
2719         } else {
2720                 ctio->u.status1.flags &=
2721                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2722                 ctio->u.status1.flags |=
2723                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2724                 ctio->u.status1.sense_length = 0;
2725                 memset(ctio->u.status1.sense_data, 0,
2726                     sizeof(ctio->u.status1.sense_data));
2727         }
2728
2729         /* Sense with len > 24, is it possible ??? */
2730 }
2731
2732 static inline int
2733 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2734 {
2735         switch (se_cmd->prot_op) {
2736         case TARGET_PROT_DOUT_INSERT:
2737         case TARGET_PROT_DIN_STRIP:
2738                 if (ql2xenablehba_err_chk >= 1)
2739                         return 1;
2740                 break;
2741         case TARGET_PROT_DOUT_PASS:
2742         case TARGET_PROT_DIN_PASS:
2743                 if (ql2xenablehba_err_chk >= 2)
2744                         return 1;
2745                 break;
2746         case TARGET_PROT_DIN_INSERT:
2747         case TARGET_PROT_DOUT_STRIP:
2748                 return 1;
2749         default:
2750                 break;
2751         }
2752         return 0;
2753 }
2754
2755 static inline int
2756 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2757 {
2758         switch (se_cmd->prot_op) {
2759         case TARGET_PROT_DIN_INSERT:
2760         case TARGET_PROT_DOUT_INSERT:
2761         case TARGET_PROT_DIN_STRIP:
2762         case TARGET_PROT_DOUT_STRIP:
2763         case TARGET_PROT_DIN_PASS:
2764         case TARGET_PROT_DOUT_PASS:
2765             return 1;
2766         default:
2767             return 0;
2768         }
2769         return 0;
2770 }
2771
2772 /*
2773  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2774  */
2775 static void
2776 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2777     uint16_t *pfw_prot_opts)
2778 {
2779         struct se_cmd *se_cmd = &cmd->se_cmd;
2780         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2781         scsi_qla_host_t *vha = cmd->tgt->vha;
2782         struct qla_hw_data *ha = vha->hw;
2783         uint32_t t32 = 0;
2784
2785         /*
2786          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2787          * have been immplemented by TCM, before AppTag is avail.
2788          * Look for modesense_handlers[]
2789          */
2790         ctx->app_tag = 0;
2791         ctx->app_tag_mask[0] = 0x0;
2792         ctx->app_tag_mask[1] = 0x0;
2793
2794         if (IS_PI_UNINIT_CAPABLE(ha)) {
2795                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2796                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2797                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2798                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2799                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2800         }
2801
2802         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2803
2804         switch (se_cmd->prot_type) {
2805         case TARGET_DIF_TYPE0_PROT:
2806                 /*
2807                  * No check for ql2xenablehba_err_chk, as it
2808                  * would be an I/O error if hba tag generation
2809                  * is not done.
2810                  */
2811                 ctx->ref_tag = cpu_to_le32(lba);
2812                 /* enable ALL bytes of the ref tag */
2813                 ctx->ref_tag_mask[0] = 0xff;
2814                 ctx->ref_tag_mask[1] = 0xff;
2815                 ctx->ref_tag_mask[2] = 0xff;
2816                 ctx->ref_tag_mask[3] = 0xff;
2817                 break;
2818         case TARGET_DIF_TYPE1_PROT:
2819             /*
2820              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2821              * REF tag, and 16 bit app tag.
2822              */
2823             ctx->ref_tag = cpu_to_le32(lba);
2824             if (!qla_tgt_ref_mask_check(se_cmd) ||
2825                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2826                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2827                     break;
2828             }
2829             /* enable ALL bytes of the ref tag */
2830             ctx->ref_tag_mask[0] = 0xff;
2831             ctx->ref_tag_mask[1] = 0xff;
2832             ctx->ref_tag_mask[2] = 0xff;
2833             ctx->ref_tag_mask[3] = 0xff;
2834             break;
2835         case TARGET_DIF_TYPE2_PROT:
2836             /*
2837              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2838              * tag has to match LBA in CDB + N
2839              */
2840             ctx->ref_tag = cpu_to_le32(lba);
2841             if (!qla_tgt_ref_mask_check(se_cmd) ||
2842                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2843                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2844                     break;
2845             }
2846             /* enable ALL bytes of the ref tag */
2847             ctx->ref_tag_mask[0] = 0xff;
2848             ctx->ref_tag_mask[1] = 0xff;
2849             ctx->ref_tag_mask[2] = 0xff;
2850             ctx->ref_tag_mask[3] = 0xff;
2851             break;
2852         case TARGET_DIF_TYPE3_PROT:
2853             /* For TYPE 3 protection: 16 bit GUARD only */
2854             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2855             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2856                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2857             break;
2858         }
2859 }
2860
2861 static inline int
2862 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2863 {
2864         uint32_t                *cur_dsd;
2865         uint32_t                transfer_length = 0;
2866         uint32_t                data_bytes;
2867         uint32_t                dif_bytes;
2868         uint8_t                 bundling = 1;
2869         uint8_t                 *clr_ptr;
2870         struct crc_context      *crc_ctx_pkt = NULL;
2871         struct qla_hw_data      *ha;
2872         struct ctio_crc2_to_fw  *pkt;
2873         dma_addr_t              crc_ctx_dma;
2874         uint16_t                fw_prot_opts = 0;
2875         struct qla_tgt_cmd      *cmd = prm->cmd;
2876         struct se_cmd           *se_cmd = &cmd->se_cmd;
2877         uint32_t h;
2878         struct atio_from_isp *atio = &prm->cmd->atio;
2879         struct qla_tc_param     tc;
2880         uint16_t t16;
2881         scsi_qla_host_t *vha = cmd->vha;
2882
2883         ha = vha->hw;
2884
2885         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2886         prm->pkt = pkt;
2887         memset(pkt, 0, sizeof(*pkt));
2888
2889         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2890                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2891                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2892                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2893
2894         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2895             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2896                 bundling = 0;
2897
2898         /* Compute dif len and adjust data len to incude protection */
2899         data_bytes = cmd->bufflen;
2900         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2901
2902         switch (se_cmd->prot_op) {
2903         case TARGET_PROT_DIN_INSERT:
2904         case TARGET_PROT_DOUT_STRIP:
2905                 transfer_length = data_bytes;
2906                 if (cmd->prot_sg_cnt)
2907                         data_bytes += dif_bytes;
2908                 break;
2909         case TARGET_PROT_DIN_STRIP:
2910         case TARGET_PROT_DOUT_INSERT:
2911         case TARGET_PROT_DIN_PASS:
2912         case TARGET_PROT_DOUT_PASS:
2913                 transfer_length = data_bytes + dif_bytes;
2914                 break;
2915         default:
2916                 BUG();
2917                 break;
2918         }
2919
2920         if (!qlt_hba_err_chk_enabled(se_cmd))
2921                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2922         /* HBA error checking enabled */
2923         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2924                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2925                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2926                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2927                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2928                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2929         }
2930
2931         switch (se_cmd->prot_op) {
2932         case TARGET_PROT_DIN_INSERT:
2933         case TARGET_PROT_DOUT_INSERT:
2934                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2935                 break;
2936         case TARGET_PROT_DIN_STRIP:
2937         case TARGET_PROT_DOUT_STRIP:
2938                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2939                 break;
2940         case TARGET_PROT_DIN_PASS:
2941         case TARGET_PROT_DOUT_PASS:
2942                 fw_prot_opts |= PO_MODE_DIF_PASS;
2943                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2944                 break;
2945         default:/* Normal Request */
2946                 fw_prot_opts |= PO_MODE_DIF_PASS;
2947                 break;
2948         }
2949
2950         /* ---- PKT ---- */
2951         /* Update entry type to indicate Command Type CRC_2 IOCB */
2952         pkt->entry_type  = CTIO_CRC2;
2953         pkt->entry_count = 1;
2954         pkt->vp_index = cmd->vp_idx;
2955
2956         h = qlt_make_handle(qpair);
2957         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2958                 /*
2959                  * CTIO type 7 from the firmware doesn't provide a way to
2960                  * know the initiator's LOOP ID, hence we can't find
2961                  * the session and, so, the command.
2962                  */
2963                 return -EAGAIN;
2964         } else
2965                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2966
2967         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
2968         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2969         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2970         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2971         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2972         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2973         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2974         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2975
2976         /* silence compile warning */
2977         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2978         pkt->ox_id  = cpu_to_le16(t16);
2979
2980         t16 = (atio->u.isp24.attr << 9);
2981         pkt->flags |= cpu_to_le16(t16);
2982         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2983
2984         /* Set transfer direction */
2985         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2986                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2987         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2988                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2989
2990         pkt->dseg_count = prm->tot_dsds;
2991         /* Fibre channel byte count */
2992         pkt->transfer_length = cpu_to_le32(transfer_length);
2993
2994         /* ----- CRC context -------- */
2995
2996         /* Allocate CRC context from global pool */
2997         crc_ctx_pkt = cmd->ctx =
2998             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2999
3000         if (!crc_ctx_pkt)
3001                 goto crc_queuing_error;
3002
3003         /* Zero out CTX area. */
3004         clr_ptr = (uint8_t *)crc_ctx_pkt;
3005         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
3006
3007         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3008         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3009
3010         /* Set handle */
3011         crc_ctx_pkt->handle = pkt->handle;
3012
3013         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3014
3015         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3016         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3017         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3018
3019         if (!bundling) {
3020                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3021         } else {
3022                 /*
3023                  * Configure Bundling if we need to fetch interlaving
3024                  * protection PCI accesses
3025                  */
3026                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3027                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3028                 crc_ctx_pkt->u.bundling.dseg_count =
3029                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3030                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3031         }
3032
3033         /* Finish the common fields of CRC pkt */
3034         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3035         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3036         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3037         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3038
3039         memset((uint8_t *)&tc, 0 , sizeof(tc));
3040         tc.vha = vha;
3041         tc.blk_sz = cmd->blk_sz;
3042         tc.bufflen = cmd->bufflen;
3043         tc.sg = cmd->sg;
3044         tc.prot_sg = cmd->prot_sg;
3045         tc.ctx = crc_ctx_pkt;
3046         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3047
3048         /* Walks data segments */
3049         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3050
3051         if (!bundling && prm->prot_seg_cnt) {
3052                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3053                         prm->tot_dsds, &tc))
3054                         goto crc_queuing_error;
3055         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3056                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3057                 goto crc_queuing_error;
3058
3059         if (bundling && prm->prot_seg_cnt) {
3060                 /* Walks dif segments */
3061                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3062
3063                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3064                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3065                         prm->prot_seg_cnt, &tc))
3066                         goto crc_queuing_error;
3067         }
3068         return QLA_SUCCESS;
3069
3070 crc_queuing_error:
3071         /* Cleanup will be performed by the caller */
3072         qpair->req->outstanding_cmds[h] = NULL;
3073
3074         return QLA_FUNCTION_FAILED;
3075 }
3076
3077 /*
3078  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3079  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3080  */
3081 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3082         uint8_t scsi_status)
3083 {
3084         struct scsi_qla_host *vha = cmd->vha;
3085         struct qla_qpair *qpair = cmd->qpair;
3086         struct ctio7_to_24xx *pkt;
3087         struct qla_tgt_prm prm;
3088         uint32_t full_req_cnt = 0;
3089         unsigned long flags = 0;
3090         int res;
3091
3092         if (cmd->sess && cmd->sess->deleted) {
3093                 cmd->state = QLA_TGT_STATE_PROCESSED;
3094                 if (cmd->sess->logout_completed)
3095                         /* no need to terminate. FW already freed exchange. */
3096                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3097                 else
3098                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3099                 return 0;
3100         }
3101
3102         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3103             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3104             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3105             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3106             &cmd->se_cmd, qpair->id);
3107
3108         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3109             &full_req_cnt);
3110         if (unlikely(res != 0)) {
3111                 return res;
3112         }
3113
3114         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3115
3116         if (xmit_type == QLA_TGT_XMIT_STATUS)
3117                 qpair->tgt_counters.core_qla_snd_status++;
3118         else
3119                 qpair->tgt_counters.core_qla_que_buf++;
3120
3121         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3122                 /*
3123                  * Either the port is not online or this request was from
3124                  * previous life, just abort the processing.
3125                  */
3126                 cmd->state = QLA_TGT_STATE_PROCESSED;
3127                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3128                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3129                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3130                         vha->flags.online, qla2x00_reset_active(vha),
3131                         cmd->reset_count, qpair->chip_reset);
3132                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3133                 return 0;
3134         }
3135
3136         /* Does F/W have an IOCBs for this request */
3137         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3138         if (unlikely(res))
3139                 goto out_unmap_unlock;
3140
3141         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3142                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3143         else
3144                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3145         if (unlikely(res != 0)) {
3146                 qpair->req->cnt += full_req_cnt;
3147                 goto out_unmap_unlock;
3148         }
3149
3150         pkt = (struct ctio7_to_24xx *)prm.pkt;
3151
3152         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3153                 pkt->u.status0.flags |=
3154                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3155                         CTIO7_FLAGS_STATUS_MODE_0);
3156
3157                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3158                         qlt_load_data_segments(&prm);
3159
3160                 if (prm.add_status_pkt == 0) {
3161                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3162                                 pkt->u.status0.scsi_status =
3163                                     cpu_to_le16(prm.rq_result);
3164                                 pkt->u.status0.residual =
3165                                     cpu_to_le32(prm.residual);
3166                                 pkt->u.status0.flags |= cpu_to_le16(
3167                                     CTIO7_FLAGS_SEND_STATUS);
3168                                 if (qlt_need_explicit_conf(cmd, 0)) {
3169                                         pkt->u.status0.flags |=
3170                                             cpu_to_le16(
3171                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3172                                                 CTIO7_FLAGS_CONFORM_REQ);
3173                                 }
3174                         }
3175
3176                 } else {
3177                         /*
3178                          * We have already made sure that there is sufficient
3179                          * amount of request entries to not drop HW lock in
3180                          * req_pkt().
3181                          */
3182                         struct ctio7_to_24xx *ctio =
3183                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3184                                     qpair->req);
3185
3186                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3187                             "Building additional status packet 0x%p.\n",
3188                             ctio);
3189
3190                         /*
3191                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3192                          * ctio7_to_24xx
3193                          */
3194                         memcpy(ctio, pkt, sizeof(*ctio));
3195                         /* reset back to CTIO7 */
3196                         ctio->entry_count = 1;
3197                         ctio->entry_type = CTIO_TYPE7;
3198                         ctio->dseg_count = 0;
3199                         ctio->u.status1.flags &= ~cpu_to_le16(
3200                             CTIO7_FLAGS_DATA_IN);
3201
3202                         /* Real finish is ctio_m1's finish */
3203                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3204                         pkt->u.status0.flags |= cpu_to_le16(
3205                             CTIO7_FLAGS_DONT_RET_CTIO);
3206
3207                         /* qlt_24xx_init_ctio_to_isp will correct
3208                          * all neccessary fields that's part of CTIO7.
3209                          * There should be no residual of CTIO-CRC2 data.
3210                          */
3211                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3212                             &prm);
3213                 }
3214         } else
3215                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3216
3217
3218         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3219         cmd->cmd_sent_to_fw = 1;
3220
3221         /* Memory Barrier */
3222         wmb();
3223         if (qpair->reqq_start_iocbs)
3224                 qpair->reqq_start_iocbs(qpair);
3225         else
3226                 qla2x00_start_iocbs(vha, qpair->req);
3227         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3228
3229         return 0;
3230
3231 out_unmap_unlock:
3232         qlt_unmap_sg(vha, cmd);
3233         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3234
3235         return res;
3236 }
3237 EXPORT_SYMBOL(qlt_xmit_response);
3238
3239 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3240 {
3241         struct ctio7_to_24xx *pkt;
3242         struct scsi_qla_host *vha = cmd->vha;
3243         struct qla_tgt *tgt = cmd->tgt;
3244         struct qla_tgt_prm prm;
3245         unsigned long flags = 0;
3246         int res = 0;
3247         struct qla_qpair *qpair = cmd->qpair;
3248
3249         memset(&prm, 0, sizeof(prm));
3250         prm.cmd = cmd;
3251         prm.tgt = tgt;
3252         prm.sg = NULL;
3253         prm.req_cnt = 1;
3254
3255         /* Calculate number of entries and segments required */
3256         if (qlt_pci_map_calc_cnt(&prm) != 0)
3257                 return -EAGAIN;
3258
3259         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3260             (cmd->sess && cmd->sess->deleted)) {
3261                 /*
3262                  * Either the port is not online or this request was from
3263                  * previous life, just abort the processing.
3264                  */
3265                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3266                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3267                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3268                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3269                         vha->flags.online, qla2x00_reset_active(vha),
3270                         cmd->reset_count, qpair->chip_reset);
3271                 return 0;
3272         }
3273
3274         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3275         /* Does F/W have an IOCBs for this request */
3276         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3277         if (res != 0)
3278                 goto out_unlock_free_unmap;
3279         if (cmd->se_cmd.prot_op)
3280                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3281         else
3282                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3283
3284         if (unlikely(res != 0)) {
3285                 qpair->req->cnt += prm.req_cnt;
3286                 goto out_unlock_free_unmap;
3287         }
3288
3289         pkt = (struct ctio7_to_24xx *)prm.pkt;
3290         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3291             CTIO7_FLAGS_STATUS_MODE_0);
3292
3293         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3294                 qlt_load_data_segments(&prm);
3295
3296         cmd->state = QLA_TGT_STATE_NEED_DATA;
3297         cmd->cmd_sent_to_fw = 1;
3298
3299         /* Memory Barrier */
3300         wmb();
3301         if (qpair->reqq_start_iocbs)
3302                 qpair->reqq_start_iocbs(qpair);
3303         else
3304                 qla2x00_start_iocbs(vha, qpair->req);
3305         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3306
3307         return res;
3308
3309 out_unlock_free_unmap:
3310         qlt_unmap_sg(vha, cmd);
3311         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3312
3313         return res;
3314 }
3315 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3316
3317
3318 /*
3319  * it is assumed either hardware_lock or qpair lock is held.
3320  */
3321 static void
3322 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3323         struct ctio_crc_from_fw *sts)
3324 {
3325         uint8_t         *ap = &sts->actual_dif[0];
3326         uint8_t         *ep = &sts->expected_dif[0];
3327         uint64_t        lba = cmd->se_cmd.t_task_lba;
3328         uint8_t scsi_status, sense_key, asc, ascq;
3329         unsigned long flags;
3330         struct scsi_qla_host *vha = cmd->vha;
3331
3332         cmd->trc_flags |= TRC_DIF_ERR;
3333
3334         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3335         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3336         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3337
3338         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3339         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3340         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3341
3342         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3343             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3344
3345         scsi_status = sense_key = asc = ascq = 0;
3346
3347         /* check appl tag */
3348         if (cmd->e_app_tag != cmd->a_app_tag) {
3349                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3350                     "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]",
3351                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3352                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3353                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3354                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3355
3356                 cmd->dif_err_code = DIF_ERR_APP;
3357                 scsi_status = SAM_STAT_CHECK_CONDITION;
3358                 sense_key = ABORTED_COMMAND;
3359                 asc = 0x10;
3360                 ascq = 0x2;
3361         }
3362
3363         /* check ref tag */
3364         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3365                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3366                     "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] ",
3367                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3368                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3369                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3370                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3371
3372                 cmd->dif_err_code = DIF_ERR_REF;
3373                 scsi_status = SAM_STAT_CHECK_CONDITION;
3374                 sense_key = ABORTED_COMMAND;
3375                 asc = 0x10;
3376                 ascq = 0x3;
3377                 goto out;
3378         }
3379
3380         /* check guard */
3381         if (cmd->e_guard != cmd->a_guard) {
3382                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3383                     "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]",
3384                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3385                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3386                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3387                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3388
3389                 cmd->dif_err_code = DIF_ERR_GRD;
3390                 scsi_status = SAM_STAT_CHECK_CONDITION;
3391                 sense_key = ABORTED_COMMAND;
3392                 asc = 0x10;
3393                 ascq = 0x1;
3394         }
3395 out:
3396         switch (cmd->state) {
3397         case QLA_TGT_STATE_NEED_DATA:
3398                 /* handle_data will load DIF error code  */
3399                 cmd->state = QLA_TGT_STATE_DATA_IN;
3400                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3401                 break;
3402         default:
3403                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3404                 if (cmd->aborted) {
3405                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3406                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3407                         break;
3408                 }
3409                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3410
3411                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3412                     ascq);
3413                 /* assume scsi status gets out on the wire.
3414                  * Will not wait for completion.
3415                  */
3416                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3417                 break;
3418         }
3419 }
3420
3421 /* If hardware_lock held on entry, might drop it, then reaquire */
3422 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3423 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3424         struct imm_ntfy_from_isp *ntfy)
3425 {
3426         struct nack_to_isp *nack;
3427         struct qla_hw_data *ha = vha->hw;
3428         request_t *pkt;
3429         int ret = 0;
3430
3431         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3432             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3433
3434         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3435         if (pkt == NULL) {
3436                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3437                     "qla_target(%d): %s failed: unable to allocate "
3438                     "request packet\n", vha->vp_idx, __func__);
3439                 return -ENOMEM;
3440         }
3441
3442         pkt->entry_type = NOTIFY_ACK_TYPE;
3443         pkt->entry_count = 1;
3444         pkt->handle = QLA_TGT_SKIP_HANDLE;
3445
3446         nack = (struct nack_to_isp *)pkt;
3447         nack->ox_id = ntfy->ox_id;
3448
3449         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3450         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3451                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3452                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3453         }
3454
3455         /* terminate */
3456         nack->u.isp24.flags |=
3457                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3458
3459         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3460         nack->u.isp24.status = ntfy->u.isp24.status;
3461         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3462         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3463         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3464         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3465         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3466         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3467
3468         qla2x00_start_iocbs(vha, vha->req);
3469         return ret;
3470 }
3471
3472 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3473         struct imm_ntfy_from_isp *imm, int ha_locked)
3474 {
3475         unsigned long flags = 0;
3476         int rc;
3477
3478         if (ha_locked) {
3479                 rc = __qlt_send_term_imm_notif(vha, imm);
3480
3481 #if 0   /* Todo  */
3482                 if (rc == -ENOMEM)
3483                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3484 #else
3485                 if (rc) {
3486                 }
3487 #endif
3488                 goto done;
3489         }
3490
3491         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3492         rc = __qlt_send_term_imm_notif(vha, imm);
3493
3494 #if 0   /* Todo */
3495         if (rc == -ENOMEM)
3496                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3497 #endif
3498
3499 done:
3500         if (!ha_locked)
3501                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3502 }
3503
3504 /*
3505  * If hardware_lock held on entry, might drop it, then reaquire
3506  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3507  */
3508 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3509         struct qla_tgt_cmd *cmd,
3510         struct atio_from_isp *atio)
3511 {
3512         struct scsi_qla_host *vha = qpair->vha;
3513         struct ctio7_to_24xx *ctio24;
3514         struct qla_hw_data *ha = vha->hw;
3515         request_t *pkt;
3516         int ret = 0;
3517         uint16_t temp;
3518
3519         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3520
3521         if (cmd)
3522                 vha = cmd->vha;
3523
3524         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3525         if (pkt == NULL) {
3526                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3527                     "qla_target(%d): %s failed: unable to allocate "
3528                     "request packet\n", vha->vp_idx, __func__);
3529                 return -ENOMEM;
3530         }
3531
3532         if (cmd != NULL) {
3533                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3534                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3535                             "qla_target(%d): Terminating cmd %p with "
3536                             "incorrect state %d\n", vha->vp_idx, cmd,
3537                             cmd->state);
3538                 } else
3539                         ret = 1;
3540         }
3541
3542         qpair->tgt_counters.num_term_xchg_sent++;
3543         pkt->entry_count = 1;
3544         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3545
3546         ctio24 = (struct ctio7_to_24xx *)pkt;
3547         ctio24->entry_type = CTIO_TYPE7;
3548         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3549         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3550         ctio24->vp_index = vha->vp_idx;
3551         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3552         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3553         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3554         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3555         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3556                 CTIO7_FLAGS_TERMINATE;
3557         ctio24->u.status1.flags = cpu_to_le16(temp);
3558         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3559         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3560
3561         /* Most likely, it isn't needed */
3562         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3563             &atio->u.isp24.fcp_cmnd.add_cdb[
3564             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3565         if (ctio24->u.status1.residual != 0)
3566                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3567
3568         /* Memory Barrier */
3569         wmb();
3570         if (qpair->reqq_start_iocbs)
3571                 qpair->reqq_start_iocbs(qpair);
3572         else
3573                 qla2x00_start_iocbs(vha, qpair->req);
3574         return ret;
3575 }
3576
3577 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3578         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3579         int ul_abort)
3580 {
3581         struct scsi_qla_host *vha;
3582         unsigned long flags = 0;
3583         int rc;
3584
3585         /* why use different vha? NPIV */
3586         if (cmd)
3587                 vha = cmd->vha;
3588         else
3589                 vha = qpair->vha;
3590
3591         if (ha_locked) {
3592                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3593                 if (rc == -ENOMEM)
3594                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3595                 goto done;
3596         }
3597         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3598         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3599         if (rc == -ENOMEM)
3600                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3601
3602 done:
3603         if (cmd && !ul_abort && !cmd->aborted) {
3604                 if (cmd->sg_mapped)
3605                         qlt_unmap_sg(vha, cmd);
3606                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3607         }
3608
3609         if (!ha_locked)
3610                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3611
3612         return;
3613 }
3614
3615 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3616 {
3617         struct list_head free_list;
3618         struct qla_tgt_cmd *cmd, *tcmd;
3619
3620         vha->hw->tgt.leak_exchg_thresh_hold =
3621             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3622
3623         cmd = tcmd = NULL;
3624         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3625                 INIT_LIST_HEAD(&free_list);
3626                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3627
3628                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3629                         list_del(&cmd->cmd_list);
3630                         /* This cmd was never sent to TCM.  There is no need
3631                          * to schedule free or call free_cmd
3632                          */
3633                         qlt_free_cmd(cmd);
3634                         vha->hw->tgt.num_qfull_cmds_alloc--;
3635                 }
3636         }
3637         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3638 }
3639
3640 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3641 {
3642         uint32_t total_leaked;
3643
3644         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3645
3646         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3647             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3648
3649                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3650                     "Chip reset due to exchange starvation: %d/%d.\n",
3651                     total_leaked, vha->hw->cur_fw_xcb_count);
3652
3653                 if (IS_P3P_TYPE(vha->hw))
3654                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3655                 else
3656                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3657                 qla2xxx_wake_dpc(vha);
3658         }
3659
3660 }
3661
3662 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3663 {
3664         struct qla_tgt *tgt = cmd->tgt;
3665         struct scsi_qla_host *vha = tgt->vha;
3666         struct se_cmd *se_cmd = &cmd->se_cmd;
3667         unsigned long flags;
3668
3669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3670             "qla_target(%d): terminating exchange for aborted cmd=%p "
3671             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3672             se_cmd->tag);
3673
3674         spin_lock_irqsave(&cmd->cmd_lock, flags);
3675         if (cmd->aborted) {
3676                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3677                 /*
3678                  * It's normal to see 2 calls in this path:
3679                  *  1) XFER Rdy completion + CMD_T_ABORT
3680                  *  2) TCM TMR - drain_state_list
3681                  */
3682                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3683                     "multiple abort. %p transport_state %x, t_state %x, "
3684                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3685                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3686                 return EIO;
3687         }
3688         cmd->aborted = 1;
3689         cmd->trc_flags |= TRC_ABORT;
3690         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3691
3692         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3693         return 0;
3694 }
3695 EXPORT_SYMBOL(qlt_abort_cmd);
3696
3697 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3698 {
3699         struct fc_port *sess = cmd->sess;
3700
3701         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3702             "%s: se_cmd[%p] ox_id %04x\n",
3703             __func__, &cmd->se_cmd,
3704             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3705
3706         BUG_ON(cmd->cmd_in_wq);
3707
3708         if (cmd->sg_mapped)
3709                 qlt_unmap_sg(cmd->vha, cmd);
3710
3711         if (!cmd->q_full)
3712                 qlt_decr_num_pend_cmds(cmd->vha);
3713
3714         BUG_ON(cmd->sg_mapped);
3715         cmd->jiffies_at_free = get_jiffies_64();
3716         if (unlikely(cmd->free_sg))
3717                 kfree(cmd->sg);
3718
3719         if (!sess || !sess->se_sess) {
3720                 WARN_ON(1);
3721                 return;
3722         }
3723         cmd->jiffies_at_free = get_jiffies_64();
3724         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3725 }
3726 EXPORT_SYMBOL(qlt_free_cmd);
3727
3728 /*
3729  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3730  */
3731 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3732         struct qla_tgt_cmd *cmd, uint32_t status)
3733 {
3734         int term = 0;
3735         struct scsi_qla_host *vha = qpair->vha;
3736
3737         if (cmd->se_cmd.prot_op)
3738                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3739                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3740                     "se_cmd=%p tag[%x] op %#x/%s",
3741                      cmd->lba, cmd->lba,
3742                      cmd->num_blks, &cmd->se_cmd,
3743                      cmd->atio.u.isp24.exchange_addr,
3744                      cmd->se_cmd.prot_op,
3745                      prot_op_str(cmd->se_cmd.prot_op));
3746
3747         if (ctio != NULL) {
3748                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3749                 term = !(c->flags &
3750                     cpu_to_le16(OF_TERM_EXCH));
3751         } else
3752                 term = 1;
3753
3754         if (term)
3755                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3756
3757         return term;
3758 }
3759
3760
3761 /* ha->hardware_lock supposed to be held on entry */
3762 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3763         struct rsp_que *rsp, uint32_t handle, void *ctio)
3764 {
3765         struct qla_tgt_cmd *cmd = NULL;
3766         struct req_que *req;
3767         int qid = GET_QID(handle);
3768         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3769
3770         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3771                 return NULL;
3772
3773         if (qid == rsp->req->id) {
3774                 req = rsp->req;
3775         } else if (vha->hw->req_q_map[qid]) {
3776                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3777                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3778                     vha->vp_idx, rsp->id, handle);
3779                 req = vha->hw->req_q_map[qid];
3780         } else {
3781                 return NULL;
3782         }
3783
3784         h &= QLA_CMD_HANDLE_MASK;
3785
3786         if (h != QLA_TGT_NULL_HANDLE) {
3787                 if (unlikely(h >= req->num_outstanding_cmds)) {
3788                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3789                             "qla_target(%d): Wrong handle %x received\n",
3790                             vha->vp_idx, handle);
3791                         return NULL;
3792                 }
3793
3794                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3795                 if (unlikely(cmd == NULL)) {
3796                         ql_dbg(ql_dbg_async, vha, 0xe053,
3797                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3798                                 vha->vp_idx, handle, req->id, rsp->id);
3799                         return NULL;
3800                 }
3801                 req->outstanding_cmds[h] = NULL;
3802         } else if (ctio != NULL) {
3803                 /* We can't get loop ID from CTIO7 */
3804                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3805                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3806                     "support NULL handles\n", vha->vp_idx);
3807                 return NULL;
3808         }
3809
3810         return cmd;
3811 }
3812
3813 /* hardware_lock should be held by caller. */
3814 void
3815 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3816 {
3817         struct qla_hw_data *ha = vha->hw;
3818
3819         if (cmd->sg_mapped)
3820                 qlt_unmap_sg(vha, cmd);
3821
3822         /* TODO: fix debug message type and ids. */
3823         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3824                 ql_dbg(ql_dbg_io, vha, 0xff00,
3825                     "HOST-ABORT: state=PROCESSED.\n");
3826         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3827                 cmd->write_data_transferred = 0;
3828                 cmd->state = QLA_TGT_STATE_DATA_IN;
3829
3830                 ql_dbg(ql_dbg_io, vha, 0xff01,
3831                     "HOST-ABORT: state=DATA_IN.\n");
3832
3833                 ha->tgt.tgt_ops->handle_data(cmd);
3834                 return;
3835         } else {
3836                 ql_dbg(ql_dbg_io, vha, 0xff03,
3837                     "HOST-ABORT: state=BAD(%d).\n",
3838                     cmd->state);
3839                 dump_stack();
3840         }
3841
3842         cmd->trc_flags |= TRC_FLUSH;
3843         ha->tgt.tgt_ops->free_cmd(cmd);
3844 }
3845
3846 /*
3847  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3848  */
3849 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3850     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3851 {
3852         struct qla_hw_data *ha = vha->hw;
3853         struct se_cmd *se_cmd;
3854         struct qla_tgt_cmd *cmd;
3855         struct qla_qpair *qpair = rsp->qpair;
3856
3857         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3858                 /* That could happen only in case of an error/reset/abort */
3859                 if (status != CTIO_SUCCESS) {
3860                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3861                             "Intermediate CTIO received"
3862                             " (status %x)\n", status);
3863                 }
3864                 return;
3865         }
3866
3867         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3868         if (cmd == NULL)
3869                 return;
3870
3871         se_cmd = &cmd->se_cmd;
3872         cmd->cmd_sent_to_fw = 0;
3873
3874         qlt_unmap_sg(vha, cmd);
3875
3876         if (unlikely(status != CTIO_SUCCESS)) {
3877                 switch (status & 0xFFFF) {
3878                 case CTIO_LIP_RESET:
3879                 case CTIO_TARGET_RESET:
3880                 case CTIO_ABORTED:
3881                         /* driver request abort via Terminate exchange */
3882                 case CTIO_TIMEOUT:
3883                 case CTIO_INVALID_RX_ID:
3884                         /* They are OK */
3885                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3886                             "qla_target(%d): CTIO with "
3887                             "status %#x received, state %x, se_cmd %p, "
3888                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3889                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3890                             status, cmd->state, se_cmd);
3891                         break;
3892
3893                 case CTIO_PORT_LOGGED_OUT:
3894                 case CTIO_PORT_UNAVAILABLE:
3895                 {
3896                         int logged_out =
3897                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3898
3899                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3900                             "qla_target(%d): CTIO with %s status %x "
3901                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3902                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3903                             status, cmd->state, se_cmd);
3904
3905                         if (logged_out && cmd->sess) {
3906                                 /*
3907                                  * Session is already logged out, but we need
3908                                  * to notify initiator, who's not aware of this
3909                                  */
3910                                 cmd->sess->logout_on_delete = 0;
3911                                 cmd->sess->send_els_logo = 1;
3912                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3913                                     "%s %d %8phC post del sess\n",
3914                                     __func__, __LINE__, cmd->sess->port_name);
3915
3916                                 qlt_schedule_sess_for_deletion(cmd->sess);
3917                         }
3918                         break;
3919                 }
3920                 case CTIO_DIF_ERROR: {
3921                         struct ctio_crc_from_fw *crc =
3922                                 (struct ctio_crc_from_fw *)ctio;
3923                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3924                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3925                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3926                             "expect_dif[0x%llx]\n",
3927                             vha->vp_idx, status, cmd->state, se_cmd,
3928                             *((u64 *)&crc->actual_dif[0]),
3929                             *((u64 *)&crc->expected_dif[0]));
3930
3931                         qlt_handle_dif_error(qpair, cmd, ctio);
3932                         return;
3933                 }
3934                 default:
3935                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3936                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3937                             vha->vp_idx, status, cmd->state, se_cmd);
3938                         break;
3939                 }
3940
3941
3942                 /* "cmd->aborted" means
3943                  * cmd is already aborted/terminated, we don't
3944                  * need to terminate again.  The exchange is already
3945                  * cleaned up/freed at FW level.  Just cleanup at driver
3946                  * level.
3947                  */
3948                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3949                     (!cmd->aborted)) {
3950                         cmd->trc_flags |= TRC_CTIO_ERR;
3951                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3952                                 return;
3953                 }
3954         }
3955
3956         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3957                 cmd->trc_flags |= TRC_CTIO_DONE;
3958         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3959                 cmd->state = QLA_TGT_STATE_DATA_IN;
3960
3961                 if (status == CTIO_SUCCESS)
3962                         cmd->write_data_transferred = 1;
3963
3964                 ha->tgt.tgt_ops->handle_data(cmd);
3965                 return;
3966         } else if (cmd->aborted) {
3967                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3968                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3969                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3970         } else {
3971                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3972                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3973                     "qla_target(%d): A command in state (%d) should "
3974                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3975         }
3976
3977         if (unlikely(status != CTIO_SUCCESS) &&
3978                 !cmd->aborted) {
3979                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3980                 dump_stack();
3981         }
3982
3983         ha->tgt.tgt_ops->free_cmd(cmd);
3984 }
3985
3986 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3987         uint8_t task_codes)
3988 {
3989         int fcp_task_attr;
3990
3991         switch (task_codes) {
3992         case ATIO_SIMPLE_QUEUE:
3993                 fcp_task_attr = TCM_SIMPLE_TAG;
3994                 break;
3995         case ATIO_HEAD_OF_QUEUE:
3996                 fcp_task_attr = TCM_HEAD_TAG;
3997                 break;
3998         case ATIO_ORDERED_QUEUE:
3999                 fcp_task_attr = TCM_ORDERED_TAG;
4000                 break;
4001         case ATIO_ACA_QUEUE:
4002                 fcp_task_attr = TCM_ACA_TAG;
4003                 break;
4004         case ATIO_UNTAGGED:
4005                 fcp_task_attr = TCM_SIMPLE_TAG;
4006                 break;
4007         default:
4008                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4009                     "qla_target: unknown task code %x, use ORDERED instead\n",
4010                     task_codes);
4011                 fcp_task_attr = TCM_ORDERED_TAG;
4012                 break;
4013         }
4014
4015         return fcp_task_attr;
4016 }
4017
4018 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4019                                         uint8_t *);
4020 /*
4021  * Process context for I/O path into tcm_qla2xxx code
4022  */
4023 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4024 {
4025         scsi_qla_host_t *vha = cmd->vha;
4026         struct qla_hw_data *ha = vha->hw;
4027         struct fc_port *sess = cmd->sess;
4028         struct atio_from_isp *atio = &cmd->atio;
4029         unsigned char *cdb;
4030         unsigned long flags;
4031         uint32_t data_length;
4032         int ret, fcp_task_attr, data_dir, bidi = 0;
4033         struct qla_qpair *qpair = cmd->qpair;
4034
4035         cmd->cmd_in_wq = 0;
4036         cmd->trc_flags |= TRC_DO_WORK;
4037
4038         if (cmd->aborted) {
4039                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4040                     "cmd with tag %u is aborted\n",
4041                     cmd->atio.u.isp24.exchange_addr);
4042                 goto out_term;
4043         }
4044
4045         spin_lock_init(&cmd->cmd_lock);
4046         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4047         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4048
4049         if (atio->u.isp24.fcp_cmnd.rddata &&
4050             atio->u.isp24.fcp_cmnd.wrdata) {
4051                 bidi = 1;
4052                 data_dir = DMA_TO_DEVICE;
4053         } else if (atio->u.isp24.fcp_cmnd.rddata)
4054                 data_dir = DMA_FROM_DEVICE;
4055         else if (atio->u.isp24.fcp_cmnd.wrdata)
4056                 data_dir = DMA_TO_DEVICE;
4057         else
4058                 data_dir = DMA_NONE;
4059
4060         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4061             atio->u.isp24.fcp_cmnd.task_attr);
4062         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4063             &atio->u.isp24.fcp_cmnd.add_cdb[
4064             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4065
4066         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4067                                           fcp_task_attr, data_dir, bidi);
4068         if (ret != 0)
4069                 goto out_term;
4070         /*
4071          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4072          */
4073         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4074         ha->tgt.tgt_ops->put_sess(sess);
4075         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4076         return;
4077
4078 out_term:
4079         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4080         /*
4081          * cmd has not sent to target yet, so pass NULL as the second
4082          * argument to qlt_send_term_exchange() and free the memory here.
4083          */
4084         cmd->trc_flags |= TRC_DO_WORK_ERR;
4085         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4086         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4087
4088         qlt_decr_num_pend_cmds(vha);
4089         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4090         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4091
4092         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4093         ha->tgt.tgt_ops->put_sess(sess);
4094         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4095 }
4096
4097 static void qlt_do_work(struct work_struct *work)
4098 {
4099         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4100         scsi_qla_host_t *vha = cmd->vha;
4101         unsigned long flags;
4102
4103         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4104         list_del(&cmd->cmd_list);
4105         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4106
4107         __qlt_do_work(cmd);
4108 }
4109
4110 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4111 {
4112         unsigned long flags;
4113         struct qla_hw_data *ha = vha->hw;
4114         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4115         void *node;
4116         u64 key = 0;
4117
4118         ql_log(ql_log_info, vha, 0x706c,
4119             "User update Number of Active Qpairs %d\n",
4120             ha->tgt.num_act_qpairs);
4121
4122         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4123
4124         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4125                 btree_remove64(&tgt->lun_qpair_map, key);
4126
4127         ha->base_qpair->lun_cnt = 0;
4128         for (key = 0; key < ha->max_qpairs; key++)
4129                 if (ha->queue_pair_map[key])
4130                         ha->queue_pair_map[key]->lun_cnt = 0;
4131
4132         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4133 }
4134
4135 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4136         struct qla_tgt_cmd *cmd)
4137 {
4138         struct qla_qpair *qpair, *qp;
4139         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4140         struct qla_qpair_hint *h;
4141
4142         if (vha->flags.qpairs_available) {
4143                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4144                 if (unlikely(!h)) {
4145                         /* spread lun to qpair ratio evently */
4146                         int lcnt = 0, rc;
4147                         struct scsi_qla_host *base_vha =
4148                                 pci_get_drvdata(vha->hw->pdev);
4149
4150                         qpair = vha->hw->base_qpair;
4151                         if (qpair->lun_cnt == 0) {
4152                                 qpair->lun_cnt++;
4153                                 h = qla_qpair_to_hint(tgt, qpair);
4154                                 BUG_ON(!h);
4155                                 rc = btree_insert64(&tgt->lun_qpair_map,
4156                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4157                                 if (rc) {
4158                                         qpair->lun_cnt--;
4159                                         ql_log(ql_log_info, vha, 0xd037,
4160                                             "Unable to insert lun %llx into lun_qpair_map\n",
4161                                             cmd->unpacked_lun);
4162                                 }
4163                                 goto out;
4164                         } else {
4165                                 lcnt = qpair->lun_cnt;
4166                         }
4167
4168                         h = NULL;
4169                         list_for_each_entry(qp, &base_vha->qp_list,
4170                             qp_list_elem) {
4171                                 if (qp->lun_cnt == 0) {
4172                                         qp->lun_cnt++;
4173                                         h = qla_qpair_to_hint(tgt, qp);
4174                                         BUG_ON(!h);
4175                                         rc = btree_insert64(&tgt->lun_qpair_map,
4176                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4177                                         if (rc) {
4178                                                 qp->lun_cnt--;
4179                                                 ql_log(ql_log_info, vha, 0xd038,
4180                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4181                                                         cmd->unpacked_lun);
4182                                         }
4183                                         qpair = qp;
4184                                         goto out;
4185                                 } else {
4186                                         if (qp->lun_cnt < lcnt) {
4187                                                 lcnt = qp->lun_cnt;
4188                                                 qpair = qp;
4189                                                 continue;
4190                                         }
4191                                 }
4192                         }
4193                         BUG_ON(!qpair);
4194                         qpair->lun_cnt++;
4195                         h = qla_qpair_to_hint(tgt, qpair);
4196                         BUG_ON(!h);
4197                         rc = btree_insert64(&tgt->lun_qpair_map,
4198                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4199                         if (rc) {
4200                                 qpair->lun_cnt--;
4201                                 ql_log(ql_log_info, vha, 0xd039,
4202                                    "Unable to insert lun %llx into lun_qpair_map\n",
4203                                    cmd->unpacked_lun);
4204                         }
4205                 }
4206         } else {
4207                 h = &tgt->qphints[0];
4208         }
4209 out:
4210         cmd->qpair = h->qpair;
4211         cmd->se_cmd.cpuid = h->cpuid;
4212 }
4213
4214 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4215                                        struct fc_port *sess,
4216                                        struct atio_from_isp *atio)
4217 {
4218         struct se_session *se_sess = sess->se_sess;
4219         struct qla_tgt_cmd *cmd;
4220         int tag;
4221
4222         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4223         if (tag < 0)
4224                 return NULL;
4225
4226         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4227         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4228         cmd->cmd_type = TYPE_TGT_CMD;
4229         memcpy(&cmd->atio, atio, sizeof(*atio));
4230         cmd->state = QLA_TGT_STATE_NEW;
4231         cmd->tgt = vha->vha_tgt.qla_tgt;
4232         qlt_incr_num_pend_cmds(vha);
4233         cmd->vha = vha;
4234         cmd->se_cmd.map_tag = tag;
4235         cmd->sess = sess;
4236         cmd->loop_id = sess->loop_id;
4237         cmd->conf_compl_supported = sess->conf_compl_supported;
4238
4239         cmd->trc_flags = 0;
4240         cmd->jiffies_at_alloc = get_jiffies_64();
4241
4242         cmd->unpacked_lun = scsilun_to_int(
4243             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4244         qlt_assign_qpair(vha, cmd);
4245         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4246         cmd->vp_idx = vha->vp_idx;
4247
4248         return cmd;
4249 }
4250
4251 /* ha->hardware_lock supposed to be held on entry */
4252 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4253         struct atio_from_isp *atio)
4254 {
4255         struct qla_hw_data *ha = vha->hw;
4256         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4257         struct fc_port *sess;
4258         struct qla_tgt_cmd *cmd;
4259         unsigned long flags;
4260         port_id_t id;
4261
4262         if (unlikely(tgt->tgt_stop)) {
4263                 ql_dbg(ql_dbg_io, vha, 0x3061,
4264                     "New command while device %p is shutting down\n", tgt);
4265                 return -ENODEV;
4266         }
4267
4268         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4269         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4270         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4271         if (IS_SW_RESV_ADDR(id))
4272                 return -EBUSY;
4273
4274         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4275         if (unlikely(!sess))
4276                 return -EFAULT;
4277
4278         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4279          * session deletion, but it's still in sess_del_work wq */
4280         if (sess->deleted) {
4281                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4282                     "New command while old session %p is being deleted\n",
4283                     sess);
4284                 return -EFAULT;
4285         }
4286
4287         /*
4288          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4289          */
4290         if (!kref_get_unless_zero(&sess->sess_kref)) {
4291                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4292                     "%s: kref_get fail, %8phC oxid %x \n",
4293                     __func__, sess->port_name,
4294                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4295                 return -EFAULT;
4296         }
4297
4298         cmd = qlt_get_tag(vha, sess, atio);
4299         if (!cmd) {
4300                 ql_dbg(ql_dbg_io, vha, 0x3062,
4301                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4302                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4303                 ha->tgt.tgt_ops->put_sess(sess);
4304                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4305                 return -EBUSY;
4306         }
4307
4308         cmd->cmd_in_wq = 1;
4309         cmd->trc_flags |= TRC_NEW_CMD;
4310
4311         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4312         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4313         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4314
4315         INIT_WORK(&cmd->work, qlt_do_work);
4316         if (vha->flags.qpairs_available) {
4317                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4318         } else if (ha->msix_count) {
4319                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4320                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4321                             &cmd->work);
4322                 else
4323                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4324                             &cmd->work);
4325         } else {
4326                 queue_work(qla_tgt_wq, &cmd->work);
4327         }
4328
4329         return 0;
4330 }
4331
4332 /* ha->hardware_lock supposed to be held on entry */
4333 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4334         int fn, void *iocb, int flags)
4335 {
4336         struct scsi_qla_host *vha = sess->vha;
4337         struct qla_hw_data *ha = vha->hw;
4338         struct qla_tgt_mgmt_cmd *mcmd;
4339         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4340         int res;
4341
4342         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4343         if (!mcmd) {
4344                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4345                     "qla_target(%d): Allocation of management "
4346                     "command failed, some commands and their data could "
4347                     "leak\n", vha->vp_idx);
4348                 return -ENOMEM;
4349         }
4350         memset(mcmd, 0, sizeof(*mcmd));
4351         mcmd->sess = sess;
4352
4353         if (iocb) {
4354                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4355                     sizeof(mcmd->orig_iocb.imm_ntfy));
4356         }
4357         mcmd->tmr_func = fn;
4358         mcmd->flags = flags;
4359         mcmd->reset_count = ha->base_qpair->chip_reset;
4360         mcmd->qpair = ha->base_qpair;
4361         mcmd->vha = vha;
4362
4363         switch (fn) {
4364         case QLA_TGT_LUN_RESET:
4365             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4366             break;
4367         }
4368
4369         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4370         if (res != 0) {
4371                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4372                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4373                     sess->vha->vp_idx, res);
4374                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4375                 return -EFAULT;
4376         }
4377
4378         return 0;
4379 }
4380
4381 /* ha->hardware_lock supposed to be held on entry */
4382 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4383 {
4384         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4385         struct qla_hw_data *ha = vha->hw;
4386         struct fc_port *sess;
4387         u64 unpacked_lun;
4388         int fn;
4389         unsigned long flags;
4390
4391         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4392
4393         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4394         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4395             a->u.isp24.fcp_hdr.s_id);
4396         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4397
4398         unpacked_lun =
4399             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4400
4401         if (sess == NULL || sess->deleted)
4402                 return -EFAULT;
4403
4404         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4405 }
4406
4407 /* ha->hardware_lock supposed to be held on entry */
4408 static int __qlt_abort_task(struct scsi_qla_host *vha,
4409         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4410 {
4411         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4412         struct qla_hw_data *ha = vha->hw;
4413         struct qla_tgt_mgmt_cmd *mcmd;
4414         u64 unpacked_lun;
4415         int rc;
4416
4417         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4418         if (mcmd == NULL) {
4419                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4420                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4421                     vha->vp_idx, __func__);
4422                 return -ENOMEM;
4423         }
4424         memset(mcmd, 0, sizeof(*mcmd));
4425
4426         mcmd->sess = sess;
4427         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4428             sizeof(mcmd->orig_iocb.imm_ntfy));
4429
4430         unpacked_lun =
4431             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4432         mcmd->reset_count = ha->base_qpair->chip_reset;
4433         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4434         mcmd->qpair = ha->base_qpair;
4435
4436         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4437             le16_to_cpu(iocb->u.isp2x.seq_id));
4438         if (rc != 0) {
4439                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4440                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4441                     vha->vp_idx, rc);
4442                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4443                 return -EFAULT;
4444         }
4445
4446         return 0;
4447 }
4448
4449 /* ha->hardware_lock supposed to be held on entry */
4450 static int qlt_abort_task(struct scsi_qla_host *vha,
4451         struct imm_ntfy_from_isp *iocb)
4452 {
4453         struct qla_hw_data *ha = vha->hw;
4454         struct fc_port *sess;
4455         int loop_id;
4456         unsigned long flags;
4457
4458         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4459
4460         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4461         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4462         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4463
4464         if (sess == NULL) {
4465                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4466                     "qla_target(%d): task abort for unexisting "
4467                     "session\n", vha->vp_idx);
4468                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4469                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4470         }
4471
4472         return __qlt_abort_task(vha, iocb, sess);
4473 }
4474
4475 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4476 {
4477         if (rc != MBS_COMMAND_COMPLETE) {
4478                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4479                         "%s: se_sess %p / sess %p from"
4480                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4481                         " LOGO failed: %#x\n",
4482                         __func__,
4483                         fcport->se_sess,
4484                         fcport,
4485                         fcport->port_name, fcport->loop_id,
4486                         fcport->d_id.b.domain, fcport->d_id.b.area,
4487                         fcport->d_id.b.al_pa, rc);
4488         }
4489
4490         fcport->logout_completed = 1;
4491 }
4492
4493 /*
4494 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4495 *
4496 * Schedules sessions with matching port_id/loop_id but different wwn for
4497 * deletion. Returns existing session with matching wwn if present.
4498 * Null otherwise.
4499 */
4500 struct fc_port *
4501 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4502     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4503 {
4504         struct fc_port *sess = NULL, *other_sess;
4505         uint64_t other_wwn;
4506
4507         *conflict_sess = NULL;
4508
4509         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4510
4511                 other_wwn = wwn_to_u64(other_sess->port_name);
4512
4513                 if (wwn == other_wwn) {
4514                         WARN_ON(sess);
4515                         sess = other_sess;
4516                         continue;
4517                 }
4518
4519                 /* find other sess with nport_id collision */
4520                 if (port_id.b24 == other_sess->d_id.b24) {
4521                         if (loop_id != other_sess->loop_id) {
4522                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4523                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4524                                     other_sess, other_sess->loop_id, other_wwn);
4525
4526                                 /*
4527                                  * logout_on_delete is set by default, but another
4528                                  * session that has the same s_id/loop_id combo
4529                                  * might have cleared it when requested this session
4530                                  * deletion, so don't touch it
4531                                  */
4532                                 qlt_schedule_sess_for_deletion(other_sess);
4533                         } else {
4534                                 /*
4535                                  * Another wwn used to have our s_id/loop_id
4536                                  * kill the session, but don't free the loop_id
4537                                  */
4538                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4539                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4540                                     other_sess, other_sess->loop_id, other_wwn);
4541
4542                                 other_sess->keep_nport_handle = 1;
4543                                 if (other_sess->disc_state != DSC_DELETED)
4544                                         *conflict_sess = other_sess;
4545                                 qlt_schedule_sess_for_deletion(other_sess);
4546                         }
4547                         continue;
4548                 }
4549
4550                 /* find other sess with nport handle collision */
4551                 if ((loop_id == other_sess->loop_id) &&
4552                         (loop_id != FC_NO_LOOP_ID)) {
4553                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4554                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4555                                other_sess, other_sess->loop_id, other_wwn);
4556
4557                         /* Same loop_id but different s_id
4558                          * Ok to kill and logout */
4559                         qlt_schedule_sess_for_deletion(other_sess);
4560                 }
4561         }
4562
4563         return sess;
4564 }
4565
4566 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4567 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4568 {
4569         struct qla_tgt_sess_op *op;
4570         struct qla_tgt_cmd *cmd;
4571         uint32_t key;
4572         int count = 0;
4573         unsigned long flags;
4574
4575         key = (((u32)s_id->b.domain << 16) |
4576                ((u32)s_id->b.area   <<  8) |
4577                ((u32)s_id->b.al_pa));
4578
4579         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4580         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4581                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4582
4583                 if (op_key == key) {
4584                         op->aborted = true;
4585                         count++;
4586                 }
4587         }
4588
4589         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4590                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4591                 if (op_key == key) {
4592                         op->aborted = true;
4593                         count++;
4594                 }
4595         }
4596
4597         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4598                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4599                 if (cmd_key == key) {
4600                         cmd->aborted = 1;
4601                         count++;
4602                 }
4603         }
4604         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4605
4606         return count;
4607 }
4608
4609 static int qlt_handle_login(struct scsi_qla_host *vha,
4610     struct imm_ntfy_from_isp *iocb)
4611 {
4612         struct fc_port *sess = NULL, *conflict_sess = NULL;
4613         uint64_t wwn;
4614         port_id_t port_id;
4615         uint16_t loop_id, wd3_lo;
4616         int res = 0;
4617         struct qlt_plogi_ack_t *pla;
4618         unsigned long flags;
4619
4620         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4621
4622         port_id.b.domain = iocb->u.isp24.port_id[2];
4623         port_id.b.area   = iocb->u.isp24.port_id[1];
4624         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4625         port_id.b.rsvd_1 = 0;
4626
4627         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4628
4629         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4630         abort_cmds_for_s_id(vha, &port_id);
4631
4632         if (wwn) {
4633                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4634                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4635                     port_id, loop_id, &conflict_sess);
4636                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4637         }
4638
4639         if (IS_SW_RESV_ADDR(port_id)) {
4640                 res = 1;
4641                 goto out;
4642         }
4643
4644         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4645         if (!pla) {
4646                 qlt_send_term_imm_notif(vha, iocb, 1);
4647                 goto out;
4648         }
4649
4650         if (conflict_sess) {
4651                 conflict_sess->login_gen++;
4652                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4653                     QLT_PLOGI_LINK_CONFLICT);
4654         }
4655
4656         if (!sess) {
4657                 pla->ref_count++;
4658                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4659                     "%s %d %8phC post new sess\n",
4660                     __func__, __LINE__, iocb->u.isp24.port_name);
4661                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4662                         qla24xx_post_newsess_work(vha, &port_id,
4663                             iocb->u.isp24.port_name,
4664                             iocb->u.isp24.u.plogi.node_name,
4665                             pla, FC4_TYPE_UNKNOWN);
4666                 else
4667                         qla24xx_post_newsess_work(vha, &port_id,
4668                             iocb->u.isp24.port_name, NULL,
4669                             pla, FC4_TYPE_UNKNOWN);
4670
4671                 goto out;
4672         }
4673
4674         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4675         sess->d_id = port_id;
4676         sess->login_gen++;
4677
4678         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4679                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4680                 sess->local = 0;
4681                 sess->loop_id = loop_id;
4682                 sess->d_id = port_id;
4683                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4684                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4685
4686                 if (wd3_lo & BIT_7)
4687                         sess->conf_compl_supported = 1;
4688
4689                 if ((wd3_lo & BIT_4) == 0)
4690                         sess->port_type = FCT_INITIATOR;
4691                 else
4692                         sess->port_type = FCT_TARGET;
4693
4694         } else
4695                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4696
4697
4698         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4699             "%s %d %8phC  DS %d\n",
4700             __func__, __LINE__, sess->port_name, sess->disc_state);
4701
4702         switch (sess->disc_state) {
4703         case DSC_DELETED:
4704                 qlt_plogi_ack_unref(vha, pla);
4705                 break;
4706
4707         default:
4708                 /*
4709                  * Under normal circumstances we want to release nport handle
4710                  * during LOGO process to avoid nport handle leaks inside FW.
4711                  * The exception is when LOGO is done while another PLOGI with
4712                  * the same nport handle is waiting as might be the case here.
4713                  * Note: there is always a possibily of a race where session
4714                  * deletion has already started for other reasons (e.g. ACL
4715                  * removal) and now PLOGI arrives:
4716                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4717                  *    FW must have assigned this PLOGI a new/same handle and we
4718                  *    can proceed ACK'ing it as usual when session deletion
4719                  *    completes.
4720                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4721                  *    bit reached it, the handle has now been released. We'll
4722                  *    get an error when we ACK this PLOGI. Nothing will be sent
4723                  *    back to initiator. Initiator should eventually retry
4724                  *    PLOGI and situation will correct itself.
4725                  */
4726                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4727                     (sess->d_id.b24 == port_id.b24));
4728
4729                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4730                     "%s %d %8phC post del sess\n",
4731                     __func__, __LINE__, sess->port_name);
4732
4733
4734                 qlt_schedule_sess_for_deletion(sess);
4735                 break;
4736         }
4737 out:
4738         return res;
4739 }
4740
4741 /*
4742  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4743  */
4744 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4745         struct imm_ntfy_from_isp *iocb)
4746 {
4747         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4748         struct qla_hw_data *ha = vha->hw;
4749         struct fc_port *sess = NULL, *conflict_sess = NULL;
4750         uint64_t wwn;
4751         port_id_t port_id;
4752         uint16_t loop_id;
4753         uint16_t wd3_lo;
4754         int res = 0;
4755         unsigned long flags;
4756
4757         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4758
4759         port_id.b.domain = iocb->u.isp24.port_id[2];
4760         port_id.b.area   = iocb->u.isp24.port_id[1];
4761         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4762         port_id.b.rsvd_1 = 0;
4763
4764         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4765
4766         ql_dbg(ql_dbg_disc, vha, 0xf026,
4767             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4768             vha->vp_idx, iocb->u.isp24.port_id[2],
4769                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4770                    iocb->u.isp24.status_subcode, loop_id,
4771                 iocb->u.isp24.port_name);
4772
4773         /* res = 1 means ack at the end of thread
4774          * res = 0 means ack async/later.
4775          */
4776         switch (iocb->u.isp24.status_subcode) {
4777         case ELS_PLOGI:
4778                 res = qlt_handle_login(vha, iocb);
4779                 break;
4780
4781         case ELS_PRLI:
4782                 if (N2N_TOPO(ha)) {
4783                         sess = qla2x00_find_fcport_by_wwpn(vha,
4784                             iocb->u.isp24.port_name, 1);
4785
4786                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4787                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4788                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4789                                     __func__, __LINE__,
4790                                     iocb->u.isp24.port_name);
4791                                 qlt_send_term_imm_notif(vha, iocb, 1);
4792                                 break;
4793                         }
4794
4795                         res = qlt_handle_login(vha, iocb);
4796                         break;
4797                 }
4798
4799                 if (IS_SW_RESV_ADDR(port_id)) {
4800                         res = 1;
4801                         break;
4802                 }
4803
4804                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4805
4806                 if (wwn) {
4807                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4808                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4809                                 loop_id, &conflict_sess);
4810                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4811                 }
4812
4813                 if (conflict_sess) {
4814                         switch (conflict_sess->disc_state) {
4815                         case DSC_DELETED:
4816                         case DSC_DELETE_PEND:
4817                                 break;
4818                         default:
4819                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4820                                     "PRLI with conflicting sess %p port %8phC\n",
4821                                     conflict_sess, conflict_sess->port_name);
4822                                 conflict_sess->fw_login_state =
4823                                     DSC_LS_PORT_UNAVAIL;
4824                                 qlt_send_term_imm_notif(vha, iocb, 1);
4825                                 res = 0;
4826                                 break;
4827                         }
4828                 }
4829
4830                 if (sess != NULL) {
4831                         bool delete = false;
4832                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4833                         switch (sess->fw_login_state) {
4834                         case DSC_LS_PLOGI_PEND:
4835                         case DSC_LS_PLOGI_COMP:
4836                         case DSC_LS_PRLI_COMP:
4837                                 break;
4838                         default:
4839                                 delete = true;
4840                                 break;
4841                         }
4842
4843                         switch (sess->disc_state) {
4844                         case DSC_LOGIN_PEND:
4845                         case DSC_GPDB:
4846                         case DSC_GPSC:
4847                         case DSC_UPD_FCPORT:
4848                         case DSC_LOGIN_COMPLETE:
4849                         case DSC_ADISC:
4850                                 delete = false;
4851                                 break;
4852                         default:
4853                                 break;
4854                         }
4855
4856                         if (delete) {
4857                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4858                                     flags);
4859                                 /*
4860                                  * Impatient initiator sent PRLI before last
4861                                  * PLOGI could finish. Will force him to re-try,
4862                                  * while last one finishes.
4863                                  */
4864                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4865                                     "sess %p PRLI received, before plogi ack.\n",
4866                                     sess);
4867                                 qlt_send_term_imm_notif(vha, iocb, 1);
4868                                 res = 0;
4869                                 break;
4870                         }
4871
4872                         /*
4873                          * This shouldn't happen under normal circumstances,
4874                          * since we have deleted the old session during PLOGI
4875                          */
4876                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4877                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4878                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4879
4880                         sess->local = 0;
4881                         sess->loop_id = loop_id;
4882                         sess->d_id = port_id;
4883                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4884
4885                         if (wd3_lo & BIT_7)
4886                                 sess->conf_compl_supported = 1;
4887
4888                         if ((wd3_lo & BIT_4) == 0)
4889                                 sess->port_type = FCT_INITIATOR;
4890                         else
4891                                 sess->port_type = FCT_TARGET;
4892
4893                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4894                 }
4895                 res = 1; /* send notify ack */
4896
4897                 /* Make session global (not used in fabric mode) */
4898                 if (ha->current_topology != ISP_CFG_F) {
4899                         if (sess) {
4900                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4901                                     "%s %d %8phC post nack\n",
4902                                     __func__, __LINE__, sess->port_name);
4903                                 qla24xx_post_nack_work(vha, sess, iocb,
4904                                         SRB_NACK_PRLI);
4905                                 res = 0;
4906                         } else {
4907                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4908                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4909                                 qla2xxx_wake_dpc(vha);
4910                         }
4911                 } else {
4912                         if (sess) {
4913                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4914                                     "%s %d %8phC post nack\n",
4915                                     __func__, __LINE__, sess->port_name);
4916                                 qla24xx_post_nack_work(vha, sess, iocb,
4917                                         SRB_NACK_PRLI);
4918                                 res = 0;
4919                         }
4920                 }
4921                 break;
4922
4923         case ELS_TPRLO:
4924                 if (le16_to_cpu(iocb->u.isp24.flags) &
4925                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4926                         loop_id = 0xFFFF;
4927                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4928                         res = 1;
4929                         break;
4930                 }
4931                 /* fall through */
4932         case ELS_LOGO:
4933         case ELS_PRLO:
4934                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4935                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4936                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4937
4938                 if (sess) {
4939                         sess->login_gen++;
4940                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4941                         sess->logo_ack_needed = 1;
4942                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4943                 }
4944
4945                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4946
4947                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
4948                     "%s: logo %llx res %d sess %p ",
4949                     __func__, wwn, res, sess);
4950                 if (res == 0) {
4951                         /*
4952                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4953                          * for LOGO_ACK & sess delete
4954                          */
4955                         BUG_ON(!sess);
4956                         res = 0;
4957                 } else {
4958                         /* cmd did not go to upper layer. */
4959                         if (sess) {
4960                                 qlt_schedule_sess_for_deletion(sess);
4961                                 res = 0;
4962                         }
4963                         /* else logo will be ack */
4964                 }
4965                 break;
4966         case ELS_PDISC:
4967         case ELS_ADISC:
4968         {
4969                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4970                 if (tgt->link_reinit_iocb_pending) {
4971                         qlt_send_notify_ack(ha->base_qpair,
4972                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4973                         tgt->link_reinit_iocb_pending = 0;
4974                 }
4975
4976                 sess = qla2x00_find_fcport_by_wwpn(vha,
4977                     iocb->u.isp24.port_name, 1);
4978                 if (sess) {
4979                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
4980                                 "sess %p lid %d|%d DS %d LS %d\n",
4981                                 sess, sess->loop_id, loop_id,
4982                                 sess->disc_state, sess->fw_login_state);
4983                 }
4984
4985                 res = 1; /* send notify ack */
4986                 break;
4987         }
4988
4989         case ELS_FLOGI: /* should never happen */
4990         default:
4991                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4992                     "qla_target(%d): Unsupported ELS command %x "
4993                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4994                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4995                 break;
4996         }
4997
4998         ql_dbg(ql_dbg_disc, vha, 0xf026,
4999             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5000             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5001
5002         return res;
5003 }
5004
5005 /*
5006  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5007  */
5008 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5009         struct imm_ntfy_from_isp *iocb)
5010 {
5011         struct qla_hw_data *ha = vha->hw;
5012         uint32_t add_flags = 0;
5013         int send_notify_ack = 1;
5014         uint16_t status;
5015
5016         status = le16_to_cpu(iocb->u.isp2x.status);
5017         switch (status) {
5018         case IMM_NTFY_LIP_RESET:
5019         {
5020                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5021                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5022                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5023                     iocb->u.isp24.status_subcode);
5024
5025                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5026                         send_notify_ack = 0;
5027                 break;
5028         }
5029
5030         case IMM_NTFY_LIP_LINK_REINIT:
5031         {
5032                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5033                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5034                     "qla_target(%d): LINK REINIT (loop %#x, "
5035                     "subcode %x)\n", vha->vp_idx,
5036                     le16_to_cpu(iocb->u.isp24.nport_handle),
5037                     iocb->u.isp24.status_subcode);
5038                 if (tgt->link_reinit_iocb_pending) {
5039                         qlt_send_notify_ack(ha->base_qpair,
5040                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5041                 }
5042                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5043                 tgt->link_reinit_iocb_pending = 1;
5044                 /*
5045                  * QLogic requires to wait after LINK REINIT for possible
5046                  * PDISC or ADISC ELS commands
5047                  */
5048                 send_notify_ack = 0;
5049                 break;
5050         }
5051
5052         case IMM_NTFY_PORT_LOGOUT:
5053                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5054                     "qla_target(%d): Port logout (loop "
5055                     "%#x, subcode %x)\n", vha->vp_idx,
5056                     le16_to_cpu(iocb->u.isp24.nport_handle),
5057                     iocb->u.isp24.status_subcode);
5058
5059                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5060                         send_notify_ack = 0;
5061                 /* The sessions will be cleared in the callback, if needed */
5062                 break;
5063
5064         case IMM_NTFY_GLBL_TPRLO:
5065                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5066                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5067                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5068                         send_notify_ack = 0;
5069                 /* The sessions will be cleared in the callback, if needed */
5070                 break;
5071
5072         case IMM_NTFY_PORT_CONFIG:
5073                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5074                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5075                     status);
5076                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5077                         send_notify_ack = 0;
5078                 /* The sessions will be cleared in the callback, if needed */
5079                 break;
5080
5081         case IMM_NTFY_GLBL_LOGO:
5082                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5083                     "qla_target(%d): Link failure detected\n",
5084                     vha->vp_idx);
5085                 /* I_T nexus loss */
5086                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5087                         send_notify_ack = 0;
5088                 break;
5089
5090         case IMM_NTFY_IOCB_OVERFLOW:
5091                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5092                     "qla_target(%d): Cannot provide requested "
5093                     "capability (IOCB overflowed the immediate notify "
5094                     "resource count)\n", vha->vp_idx);
5095                 break;
5096
5097         case IMM_NTFY_ABORT_TASK:
5098                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5099                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5100                     "L %#x)\n", vha->vp_idx,
5101                     le16_to_cpu(iocb->u.isp2x.seq_id),
5102                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5103                     le16_to_cpu(iocb->u.isp2x.lun));
5104                 if (qlt_abort_task(vha, iocb) == 0)
5105                         send_notify_ack = 0;
5106                 break;
5107
5108         case IMM_NTFY_RESOURCE:
5109                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5110                     "qla_target(%d): Out of resources, host %ld\n",
5111                     vha->vp_idx, vha->host_no);
5112                 break;
5113
5114         case IMM_NTFY_MSG_RX:
5115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5116                     "qla_target(%d): Immediate notify task %x\n",
5117                     vha->vp_idx, iocb->u.isp2x.task_flags);
5118                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5119                         send_notify_ack = 0;
5120                 break;
5121
5122         case IMM_NTFY_ELS:
5123                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5124                         send_notify_ack = 0;
5125                 break;
5126         default:
5127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5128                     "qla_target(%d): Received unknown immediate "
5129                     "notify status %x\n", vha->vp_idx, status);
5130                 break;
5131         }
5132
5133         if (send_notify_ack)
5134                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5135                     0, 0);
5136 }
5137
5138 /*
5139  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5140  * This function sends busy to ISP 2xxx or 24xx.
5141  */
5142 static int __qlt_send_busy(struct qla_qpair *qpair,
5143         struct atio_from_isp *atio, uint16_t status)
5144 {
5145         struct scsi_qla_host *vha = qpair->vha;
5146         struct ctio7_to_24xx *ctio24;
5147         struct qla_hw_data *ha = vha->hw;
5148         request_t *pkt;
5149         struct fc_port *sess = NULL;
5150         unsigned long flags;
5151         u16 temp;
5152
5153         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5154         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5155             atio->u.isp24.fcp_hdr.s_id);
5156         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5157         if (!sess) {
5158                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5159                 return 0;
5160         }
5161         /* Sending marker isn't necessary, since we called from ISR */
5162
5163         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5164         if (!pkt) {
5165                 ql_dbg(ql_dbg_io, vha, 0x3063,
5166                     "qla_target(%d): %s failed: unable to allocate "
5167                     "request packet", vha->vp_idx, __func__);
5168                 return -ENOMEM;
5169         }
5170
5171         qpair->tgt_counters.num_q_full_sent++;
5172         pkt->entry_count = 1;
5173         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5174
5175         ctio24 = (struct ctio7_to_24xx *)pkt;
5176         ctio24->entry_type = CTIO_TYPE7;
5177         ctio24->nport_handle = sess->loop_id;
5178         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5179         ctio24->vp_index = vha->vp_idx;
5180         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5181         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5182         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5183         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5184         temp = (atio->u.isp24.attr << 9) |
5185                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5186                 CTIO7_FLAGS_DONT_RET_CTIO;
5187         ctio24->u.status1.flags = cpu_to_le16(temp);
5188         /*
5189          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5190          * if the explicit conformation is used.
5191          */
5192         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5193         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5194         /* Memory Barrier */
5195         wmb();
5196         if (qpair->reqq_start_iocbs)
5197                 qpair->reqq_start_iocbs(qpair);
5198         else
5199                 qla2x00_start_iocbs(vha, qpair->req);
5200         return 0;
5201 }
5202
5203 /*
5204  * This routine is used to allocate a command for either a QFull condition
5205  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5206  * out previously.
5207  */
5208 static void
5209 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5210         struct atio_from_isp *atio, uint16_t status, int qfull)
5211 {
5212         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5213         struct qla_hw_data *ha = vha->hw;
5214         struct fc_port *sess;
5215         struct se_session *se_sess;
5216         struct qla_tgt_cmd *cmd;
5217         int tag;
5218         unsigned long flags;
5219
5220         if (unlikely(tgt->tgt_stop)) {
5221                 ql_dbg(ql_dbg_io, vha, 0x300a,
5222                         "New command while device %p is shutting down\n", tgt);
5223                 return;
5224         }
5225
5226         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5227                 vha->hw->tgt.num_qfull_cmds_dropped++;
5228                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5229                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5230                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5231                                 vha->hw->tgt.num_qfull_cmds_dropped;
5232
5233                 ql_dbg(ql_dbg_io, vha, 0x3068,
5234                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5235                         vha->vp_idx, __func__,
5236                         vha->hw->tgt.num_qfull_cmds_dropped);
5237
5238                 qlt_chk_exch_leak_thresh_hold(vha);
5239                 return;
5240         }
5241
5242         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5243                 (vha, atio->u.isp24.fcp_hdr.s_id);
5244         if (!sess)
5245                 return;
5246
5247         se_sess = sess->se_sess;
5248
5249         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5250         if (tag < 0)
5251                 return;
5252
5253         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5254         if (!cmd) {
5255                 ql_dbg(ql_dbg_io, vha, 0x3009,
5256                         "qla_target(%d): %s: Allocation of cmd failed\n",
5257                         vha->vp_idx, __func__);
5258
5259                 vha->hw->tgt.num_qfull_cmds_dropped++;
5260                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5261                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5262                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5263                                 vha->hw->tgt.num_qfull_cmds_dropped;
5264
5265                 qlt_chk_exch_leak_thresh_hold(vha);
5266                 return;
5267         }
5268
5269         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5270
5271         qlt_incr_num_pend_cmds(vha);
5272         INIT_LIST_HEAD(&cmd->cmd_list);
5273         memcpy(&cmd->atio, atio, sizeof(*atio));
5274
5275         cmd->tgt = vha->vha_tgt.qla_tgt;
5276         cmd->vha = vha;
5277         cmd->reset_count = ha->base_qpair->chip_reset;
5278         cmd->q_full = 1;
5279         cmd->qpair = ha->base_qpair;
5280
5281         if (qfull) {
5282                 cmd->q_full = 1;
5283                 /* NOTE: borrowing the state field to carry the status */
5284                 cmd->state = status;
5285         } else
5286                 cmd->term_exchg = 1;
5287
5288         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5289         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5290
5291         vha->hw->tgt.num_qfull_cmds_alloc++;
5292         if (vha->hw->tgt.num_qfull_cmds_alloc >
5293                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5294                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5295                         vha->hw->tgt.num_qfull_cmds_alloc;
5296         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5297 }
5298
5299 int
5300 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5301 {
5302         struct scsi_qla_host *vha = qpair->vha;
5303         struct qla_hw_data *ha = vha->hw;
5304         unsigned long flags;
5305         struct qla_tgt_cmd *cmd, *tcmd;
5306         struct list_head free_list, q_full_list;
5307         int rc = 0;
5308
5309         if (list_empty(&ha->tgt.q_full_list))
5310                 return 0;
5311
5312         INIT_LIST_HEAD(&free_list);
5313         INIT_LIST_HEAD(&q_full_list);
5314
5315         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5316         if (list_empty(&ha->tgt.q_full_list)) {
5317                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5318                 return 0;
5319         }
5320
5321         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5322         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5323
5324         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5325         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5326                 if (cmd->q_full)
5327                         /* cmd->state is a borrowed field to hold status */
5328                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5329                 else if (cmd->term_exchg)
5330                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5331
5332                 if (rc == -ENOMEM)
5333                         break;
5334
5335                 if (cmd->q_full)
5336                         ql_dbg(ql_dbg_io, vha, 0x3006,
5337                             "%s: busy sent for ox_id[%04x]\n", __func__,
5338                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5339                 else if (cmd->term_exchg)
5340                         ql_dbg(ql_dbg_io, vha, 0x3007,
5341                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5342                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5343                 else
5344                         ql_dbg(ql_dbg_io, vha, 0x3008,
5345                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5346                             cmd);
5347
5348                 list_del(&cmd->cmd_list);
5349                 list_add_tail(&cmd->cmd_list, &free_list);
5350
5351                 /* piggy back on hardware_lock for protection */
5352                 vha->hw->tgt.num_qfull_cmds_alloc--;
5353         }
5354         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5355
5356         cmd = NULL;
5357
5358         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5359                 list_del(&cmd->cmd_list);
5360                 /* This cmd was never sent to TCM.  There is no need
5361                  * to schedule free or call free_cmd
5362                  */
5363                 qlt_free_cmd(cmd);
5364         }
5365
5366         if (!list_empty(&q_full_list)) {
5367                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5368                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5369                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5370         }
5371
5372         return rc;
5373 }
5374
5375 static void
5376 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5377     uint16_t status)
5378 {
5379         int rc = 0;
5380         struct scsi_qla_host *vha = qpair->vha;
5381
5382         rc = __qlt_send_busy(qpair, atio, status);
5383         if (rc == -ENOMEM)
5384                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5385 }
5386
5387 static int
5388 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5389         struct atio_from_isp *atio, uint8_t ha_locked)
5390 {
5391         struct qla_hw_data *ha = vha->hw;
5392         unsigned long flags;
5393
5394         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5395                 return 0;
5396
5397         if (!ha_locked)
5398                 spin_lock_irqsave(&ha->hardware_lock, flags);
5399         qlt_send_busy(qpair, atio, qla_sam_status);
5400         if (!ha_locked)
5401                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5402
5403         return 1;
5404 }
5405
5406 /* ha->hardware_lock supposed to be held on entry */
5407 /* called via callback from qla2xxx */
5408 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5409         struct atio_from_isp *atio, uint8_t ha_locked)
5410 {
5411         struct qla_hw_data *ha = vha->hw;
5412         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5413         int rc;
5414         unsigned long flags = 0;
5415
5416         if (unlikely(tgt == NULL)) {
5417                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5418                     "ATIO pkt, but no tgt (ha %p)", ha);
5419                 return;
5420         }
5421         /*
5422          * In tgt_stop mode we also should allow all requests to pass.
5423          * Otherwise, some commands can stuck.
5424          */
5425
5426         tgt->atio_irq_cmd_count++;
5427
5428         switch (atio->u.raw.entry_type) {
5429         case ATIO_TYPE7:
5430                 if (unlikely(atio->u.isp24.exchange_addr ==
5431                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5432                         ql_dbg(ql_dbg_io, vha, 0x3065,
5433                             "qla_target(%d): ATIO_TYPE7 "
5434                             "received with UNKNOWN exchange address, "
5435                             "sending QUEUE_FULL\n", vha->vp_idx);
5436                         if (!ha_locked)
5437                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5438                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5439                         if (!ha_locked)
5440                                 spin_unlock_irqrestore(&ha->hardware_lock,
5441                                     flags);
5442                         break;
5443                 }
5444
5445                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5446                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5447                             atio, ha_locked);
5448                         if (rc != 0) {
5449                                 tgt->atio_irq_cmd_count--;
5450                                 return;
5451                         }
5452                         rc = qlt_handle_cmd_for_atio(vha, atio);
5453                 } else {
5454                         rc = qlt_handle_task_mgmt(vha, atio);
5455                 }
5456                 if (unlikely(rc != 0)) {
5457                         if (!ha_locked)
5458                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5459                         switch (rc) {
5460                         case -ENODEV:
5461                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5462                                     "qla_target: Unable to send command to target\n");
5463                                 break;
5464                         case -EBADF:
5465                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5466                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5467                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5468                                     atio, 1, 0);
5469                                 break;
5470                         case -EBUSY:
5471                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5472                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5473                                     vha->vp_idx);
5474                                 qlt_send_busy(ha->base_qpair, atio,
5475                                     tc_sam_status);
5476                                 break;
5477                         default:
5478                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5479                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5480                                     vha->vp_idx);
5481                                 qlt_send_busy(ha->base_qpair, atio,
5482                                     qla_sam_status);
5483                                 break;
5484                         }
5485                         if (!ha_locked)
5486                                 spin_unlock_irqrestore(&ha->hardware_lock,
5487                                     flags);
5488                 }
5489                 break;
5490
5491         case IMMED_NOTIFY_TYPE:
5492         {
5493                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5494                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5495                             "qla_target(%d): Received ATIO packet %x "
5496                             "with error status %x\n", vha->vp_idx,
5497                             atio->u.raw.entry_type,
5498                             atio->u.isp2x.entry_status);
5499                         break;
5500                 }
5501                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5502
5503                 if (!ha_locked)
5504                         spin_lock_irqsave(&ha->hardware_lock, flags);
5505                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5506                 if (!ha_locked)
5507                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5508                 break;
5509         }
5510
5511         default:
5512                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5513                     "qla_target(%d): Received unknown ATIO atio "
5514                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5515                 break;
5516         }
5517
5518         tgt->atio_irq_cmd_count--;
5519 }
5520
5521 /* ha->hardware_lock supposed to be held on entry */
5522 /* called via callback from qla2xxx */
5523 static void qlt_response_pkt(struct scsi_qla_host *vha,
5524         struct rsp_que *rsp, response_t *pkt)
5525 {
5526         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5527
5528         if (unlikely(tgt == NULL)) {
5529                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5530                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5531                     vha->vp_idx, pkt->entry_type, vha->hw);
5532                 return;
5533         }
5534
5535         /*
5536          * In tgt_stop mode we also should allow all requests to pass.
5537          * Otherwise, some commands can stuck.
5538          */
5539
5540         switch (pkt->entry_type) {
5541         case CTIO_CRC2:
5542         case CTIO_TYPE7:
5543         {
5544                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5545                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5546                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5547                     entry);
5548                 break;
5549         }
5550
5551         case ACCEPT_TGT_IO_TYPE:
5552         {
5553                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5554                 int rc;
5555                 if (atio->u.isp2x.status !=
5556                     cpu_to_le16(ATIO_CDB_VALID)) {
5557                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5558                             "qla_target(%d): ATIO with error "
5559                             "status %x received\n", vha->vp_idx,
5560                             le16_to_cpu(atio->u.isp2x.status));
5561                         break;
5562                 }
5563
5564                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5565                 if (rc != 0)
5566                         return;
5567
5568                 rc = qlt_handle_cmd_for_atio(vha, atio);
5569                 if (unlikely(rc != 0)) {
5570                         switch (rc) {
5571                         case -ENODEV:
5572                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5573                                     "qla_target: Unable to send command to target\n");
5574                                 break;
5575                         case -EBADF:
5576                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5577                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5578                                 qlt_send_term_exchange(rsp->qpair, NULL,
5579                                     atio, 1, 0);
5580                                 break;
5581                         case -EBUSY:
5582                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5583                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5584                                     vha->vp_idx);
5585                                 qlt_send_busy(rsp->qpair, atio,
5586                                     tc_sam_status);
5587                                 break;
5588                         default:
5589                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5590                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5591                                     vha->vp_idx);
5592                                 qlt_send_busy(rsp->qpair, atio,
5593                                     qla_sam_status);
5594                                 break;
5595                         }
5596                 }
5597         }
5598         break;
5599
5600         case CONTINUE_TGT_IO_TYPE:
5601         {
5602                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5603                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5604                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5605                     entry);
5606                 break;
5607         }
5608
5609         case CTIO_A64_TYPE:
5610         {
5611                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5612                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5613                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5614                     entry);
5615                 break;
5616         }
5617
5618         case IMMED_NOTIFY_TYPE:
5619                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5620                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5621                 break;
5622
5623         case NOTIFY_ACK_TYPE:
5624                 if (tgt->notify_ack_expected > 0) {
5625                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5626                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5627                             "NOTIFY_ACK seq %08x status %x\n",
5628                             le16_to_cpu(entry->u.isp2x.seq_id),
5629                             le16_to_cpu(entry->u.isp2x.status));
5630                         tgt->notify_ack_expected--;
5631                         if (entry->u.isp2x.status !=
5632                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5633                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5634                                     "qla_target(%d): NOTIFY_ACK "
5635                                     "failed %x\n", vha->vp_idx,
5636                                     le16_to_cpu(entry->u.isp2x.status));
5637                         }
5638                 } else {
5639                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5640                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5641                             vha->vp_idx);
5642                 }
5643                 break;
5644
5645         case ABTS_RECV_24XX:
5646                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5647                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5648                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5649                 break;
5650
5651         case ABTS_RESP_24XX:
5652                 if (tgt->abts_resp_expected > 0) {
5653                         struct abts_resp_from_24xx_fw *entry =
5654                                 (struct abts_resp_from_24xx_fw *)pkt;
5655                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5656                             "ABTS_RESP_24XX: compl_status %x\n",
5657                             entry->compl_status);
5658                         tgt->abts_resp_expected--;
5659                         if (le16_to_cpu(entry->compl_status) !=
5660                             ABTS_RESP_COMPL_SUCCESS) {
5661                                 if ((entry->error_subcode1 == 0x1E) &&
5662                                     (entry->error_subcode2 == 0)) {
5663                                         /*
5664                                          * We've got a race here: aborted
5665                                          * exchange not terminated, i.e.
5666                                          * response for the aborted command was
5667                                          * sent between the abort request was
5668                                          * received and processed.
5669                                          * Unfortunately, the firmware has a
5670                                          * silly requirement that all aborted
5671                                          * exchanges must be explicitely
5672                                          * terminated, otherwise it refuses to
5673                                          * send responses for the abort
5674                                          * requests. So, we have to
5675                                          * (re)terminate the exchange and retry
5676                                          * the abort response.
5677                                          */
5678                                         qlt_24xx_retry_term_exchange(vha,
5679                                             entry);
5680                                 } else
5681                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5682                                             "qla_target(%d): ABTS_RESP_24XX "
5683                                             "failed %x (subcode %x:%x)",
5684                                             vha->vp_idx, entry->compl_status,
5685                                             entry->error_subcode1,
5686                                             entry->error_subcode2);
5687                         }
5688                 } else {
5689                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5690                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5691                             "received\n", vha->vp_idx);
5692                 }
5693                 break;
5694
5695         default:
5696                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5697                     "qla_target(%d): Received unknown response pkt "
5698                     "type %x\n", vha->vp_idx, pkt->entry_type);
5699                 break;
5700         }
5701
5702 }
5703
5704 /*
5705  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5706  */
5707 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5708         uint16_t *mailbox)
5709 {
5710         struct qla_hw_data *ha = vha->hw;
5711         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5712         int login_code;
5713
5714         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5715                 return;
5716
5717         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5718             IS_QLA2100(ha))
5719                 return;
5720         /*
5721          * In tgt_stop mode we also should allow all requests to pass.
5722          * Otherwise, some commands can stuck.
5723          */
5724
5725
5726         switch (code) {
5727         case MBA_RESET:                 /* Reset */
5728         case MBA_SYSTEM_ERR:            /* System Error */
5729         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5730         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5731                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5732                     "qla_target(%d): System error async event %#x "
5733                     "occurred", vha->vp_idx, code);
5734                 break;
5735         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5736                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5737                 break;
5738
5739         case MBA_LOOP_UP:
5740         {
5741                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5742                     "qla_target(%d): Async LOOP_UP occurred "
5743                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5744                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5745                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5746                 if (tgt->link_reinit_iocb_pending) {
5747                         qlt_send_notify_ack(ha->base_qpair,
5748                             (void *)&tgt->link_reinit_iocb,
5749                             0, 0, 0, 0, 0, 0);
5750                         tgt->link_reinit_iocb_pending = 0;
5751                 }
5752                 break;
5753         }
5754
5755         case MBA_LIP_OCCURRED:
5756         case MBA_LOOP_DOWN:
5757         case MBA_LIP_RESET:
5758         case MBA_RSCN_UPDATE:
5759                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5760                     "qla_target(%d): Async event %#x occurred "
5761                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5762                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5763                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5764                 break;
5765
5766         case MBA_REJECTED_FCP_CMD:
5767                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5768                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5769                     vha->vp_idx,
5770                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5771                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5772
5773                 if (le16_to_cpu(mailbox[3]) == 1) {
5774                         /* exchange starvation. */
5775                         vha->hw->exch_starvation++;
5776                         if (vha->hw->exch_starvation > 5) {
5777                                 ql_log(ql_log_warn, vha, 0xd03a,
5778                                     "Exchange starvation-. Resetting RISC\n");
5779
5780                                 vha->hw->exch_starvation = 0;
5781                                 if (IS_P3P_TYPE(vha->hw))
5782                                         set_bit(FCOE_CTX_RESET_NEEDED,
5783                                             &vha->dpc_flags);
5784                                 else
5785                                         set_bit(ISP_ABORT_NEEDED,
5786                                             &vha->dpc_flags);
5787                                 qla2xxx_wake_dpc(vha);
5788                         }
5789                 }
5790                 break;
5791
5792         case MBA_PORT_UPDATE:
5793                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5794                     "qla_target(%d): Port update async event %#x "
5795                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5796                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5797                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5798                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5799
5800                 login_code = le16_to_cpu(mailbox[2]);
5801                 if (login_code == 0x4) {
5802                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5803                             "Async MB 2: Got PLOGI Complete\n");
5804                         vha->hw->exch_starvation = 0;
5805                 } else if (login_code == 0x7)
5806                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5807                             "Async MB 2: Port Logged Out\n");
5808                 break;
5809         default:
5810                 break;
5811         }
5812
5813 }
5814
5815 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5816         uint16_t loop_id)
5817 {
5818         fc_port_t *fcport, *tfcp, *del;
5819         int rc;
5820         unsigned long flags;
5821         u8 newfcport = 0;
5822
5823         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5824         if (!fcport) {
5825                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5826                     "qla_target(%d): Allocation of tmp FC port failed",
5827                     vha->vp_idx);
5828                 return NULL;
5829         }
5830
5831         fcport->loop_id = loop_id;
5832
5833         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5834         if (rc != QLA_SUCCESS) {
5835                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5836                     "qla_target(%d): Failed to retrieve fcport "
5837                     "information -- get_port_database() returned %x "
5838                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5839                 kfree(fcport);
5840                 return NULL;
5841         }
5842
5843         del = NULL;
5844         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5845         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5846
5847         if (tfcp) {
5848                 tfcp->d_id = fcport->d_id;
5849                 tfcp->port_type = fcport->port_type;
5850                 tfcp->supported_classes = fcport->supported_classes;
5851                 tfcp->flags |= fcport->flags;
5852                 tfcp->scan_state = QLA_FCPORT_FOUND;
5853
5854                 del = fcport;
5855                 fcport = tfcp;
5856         } else {
5857                 if (vha->hw->current_topology == ISP_CFG_F)
5858                         fcport->flags |= FCF_FABRIC_DEVICE;
5859
5860                 list_add_tail(&fcport->list, &vha->vp_fcports);
5861                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5862                    vha->fcport_count++;
5863                 fcport->login_gen++;
5864                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5865                 fcport->login_succ = 1;
5866                 newfcport = 1;
5867         }
5868
5869         fcport->deleted = 0;
5870         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5871
5872         switch (vha->host->active_mode) {
5873         case MODE_INITIATOR:
5874         case MODE_DUAL:
5875                 if (newfcport) {
5876                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5877                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5878                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5879                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5880                                 qla24xx_post_upd_fcport_work(vha, fcport);
5881                         } else {
5882                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5883                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5884                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5885                                 qla24xx_post_gpsc_work(vha, fcport);
5886                         }
5887                 }
5888                 break;
5889
5890         case MODE_TARGET:
5891         default:
5892                 break;
5893         }
5894         if (del)
5895                 qla2x00_free_fcport(del);
5896
5897         return fcport;
5898 }
5899
5900 /* Must be called under tgt_mutex */
5901 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5902         uint8_t *s_id)
5903 {
5904         struct fc_port *sess = NULL;
5905         fc_port_t *fcport = NULL;
5906         int rc, global_resets;
5907         uint16_t loop_id = 0;
5908
5909         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5910                 /*
5911                  * This is Domain Controller, so it should be
5912                  * OK to drop SCSI commands from it.
5913                  */
5914                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5915                     "Unable to find initiator with S_ID %x:%x:%x",
5916                     s_id[0], s_id[1], s_id[2]);
5917                 return NULL;
5918         }
5919
5920         mutex_lock(&vha->vha_tgt.tgt_mutex);
5921
5922 retry:
5923         global_resets =
5924             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5925
5926         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5927         if (rc != 0) {
5928                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5929
5930                 ql_log(ql_log_info, vha, 0xf071,
5931                     "qla_target(%d): Unable to find "
5932                     "initiator with S_ID %x:%x:%x",
5933                     vha->vp_idx, s_id[0], s_id[1],
5934                     s_id[2]);
5935
5936                 if (rc == -ENOENT) {
5937                         qlt_port_logo_t logo;
5938                         sid_to_portid(s_id, &logo.id);
5939                         logo.cmd_count = 1;
5940                         qlt_send_first_logo(vha, &logo);
5941                 }
5942
5943                 return NULL;
5944         }
5945
5946         fcport = qlt_get_port_database(vha, loop_id);
5947         if (!fcport) {
5948                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5949                 return NULL;
5950         }
5951
5952         if (global_resets !=
5953             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5954                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5955                     "qla_target(%d): global reset during session discovery "
5956                     "(counter was %d, new %d), retrying", vha->vp_idx,
5957                     global_resets,
5958                     atomic_read(&vha->vha_tgt.
5959                         qla_tgt->tgt_global_resets_count));
5960                 goto retry;
5961         }
5962
5963         sess = qlt_create_sess(vha, fcport, true);
5964
5965         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5966
5967         return sess;
5968 }
5969
5970 static void qlt_abort_work(struct qla_tgt *tgt,
5971         struct qla_tgt_sess_work_param *prm)
5972 {
5973         struct scsi_qla_host *vha = tgt->vha;
5974         struct qla_hw_data *ha = vha->hw;
5975         struct fc_port *sess = NULL;
5976         unsigned long flags = 0, flags2 = 0;
5977         uint32_t be_s_id;
5978         uint8_t s_id[3];
5979         int rc;
5980
5981         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5982
5983         if (tgt->tgt_stop)
5984                 goto out_term2;
5985
5986         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5987         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5988         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5989
5990         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5991             (unsigned char *)&be_s_id);
5992         if (!sess) {
5993                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5994
5995                 sess = qlt_make_local_sess(vha, s_id);
5996                 /* sess has got an extra creation ref */
5997
5998                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5999                 if (!sess)
6000                         goto out_term2;
6001         } else {
6002                 if (sess->deleted) {
6003                         sess = NULL;
6004                         goto out_term2;
6005                 }
6006
6007                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6008                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6009                             "%s: kref_get fail %8phC \n",
6010                              __func__, sess->port_name);
6011                         sess = NULL;
6012                         goto out_term2;
6013                 }
6014         }
6015
6016         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6017         ha->tgt.tgt_ops->put_sess(sess);
6018         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6019
6020         if (rc != 0)
6021                 goto out_term;
6022         return;
6023
6024 out_term2:
6025         if (sess)
6026                 ha->tgt.tgt_ops->put_sess(sess);
6027         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6028
6029 out_term:
6030         spin_lock_irqsave(&ha->hardware_lock, flags);
6031         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6032             FCP_TMF_REJECTED, false);
6033         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6034 }
6035
6036 static void qlt_tmr_work(struct qla_tgt *tgt,
6037         struct qla_tgt_sess_work_param *prm)
6038 {
6039         struct atio_from_isp *a = &prm->tm_iocb2;
6040         struct scsi_qla_host *vha = tgt->vha;
6041         struct qla_hw_data *ha = vha->hw;
6042         struct fc_port *sess = NULL;
6043         unsigned long flags;
6044         uint8_t *s_id = NULL; /* to hide compiler warnings */
6045         int rc;
6046         u64 unpacked_lun;
6047         int fn;
6048         void *iocb;
6049
6050         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6051
6052         if (tgt->tgt_stop)
6053                 goto out_term2;
6054
6055         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6056         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6057         if (!sess) {
6058                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6059
6060                 sess = qlt_make_local_sess(vha, s_id);
6061                 /* sess has got an extra creation ref */
6062
6063                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6064                 if (!sess)
6065                         goto out_term2;
6066         } else {
6067                 if (sess->deleted) {
6068                         sess = NULL;
6069                         goto out_term2;
6070                 }
6071
6072                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6073                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6074                             "%s: kref_get fail %8phC\n",
6075                              __func__, sess->port_name);
6076                         sess = NULL;
6077                         goto out_term2;
6078                 }
6079         }
6080
6081         iocb = a;
6082         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6083         unpacked_lun =
6084             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6085
6086         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6087         ha->tgt.tgt_ops->put_sess(sess);
6088         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6089
6090         if (rc != 0)
6091                 goto out_term;
6092         return;
6093
6094 out_term2:
6095         if (sess)
6096                 ha->tgt.tgt_ops->put_sess(sess);
6097         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6098 out_term:
6099         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6100 }
6101
6102 static void qlt_sess_work_fn(struct work_struct *work)
6103 {
6104         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6105         struct scsi_qla_host *vha = tgt->vha;
6106         unsigned long flags;
6107
6108         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6109
6110         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6111         while (!list_empty(&tgt->sess_works_list)) {
6112                 struct qla_tgt_sess_work_param *prm = list_entry(
6113                     tgt->sess_works_list.next, typeof(*prm),
6114                     sess_works_list_entry);
6115
6116                 /*
6117                  * This work can be scheduled on several CPUs at time, so we
6118                  * must delete the entry to eliminate double processing
6119                  */
6120                 list_del(&prm->sess_works_list_entry);
6121
6122                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6123
6124                 switch (prm->type) {
6125                 case QLA_TGT_SESS_WORK_ABORT:
6126                         qlt_abort_work(tgt, prm);
6127                         break;
6128                 case QLA_TGT_SESS_WORK_TM:
6129                         qlt_tmr_work(tgt, prm);
6130                         break;
6131                 default:
6132                         BUG_ON(1);
6133                         break;
6134                 }
6135
6136                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6137
6138                 kfree(prm);
6139         }
6140         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6141 }
6142
6143 /* Must be called under tgt_host_action_mutex */
6144 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6145 {
6146         struct qla_tgt *tgt;
6147         int rc, i;
6148         struct qla_qpair_hint *h;
6149
6150         if (!QLA_TGT_MODE_ENABLED())
6151                 return 0;
6152
6153         if (!IS_TGT_MODE_CAPABLE(ha)) {
6154                 ql_log(ql_log_warn, base_vha, 0xe070,
6155                     "This adapter does not support target mode.\n");
6156                 return 0;
6157         }
6158
6159         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6160             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6161
6162         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6163
6164         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6165         if (!tgt) {
6166                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6167                     "Unable to allocate struct qla_tgt\n");
6168                 return -ENOMEM;
6169         }
6170
6171         tgt->qphints = kzalloc((ha->max_qpairs + 1) *
6172             sizeof(struct qla_qpair_hint), GFP_KERNEL);
6173         if (!tgt->qphints) {
6174                 kfree(tgt);
6175                 ql_log(ql_log_warn, base_vha, 0x0197,
6176                     "Unable to allocate qpair hints.\n");
6177                 return -ENOMEM;
6178         }
6179
6180         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6181                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6182
6183         rc = btree_init64(&tgt->lun_qpair_map);
6184         if (rc) {
6185                 kfree(tgt->qphints);
6186                 kfree(tgt);
6187                 ql_log(ql_log_info, base_vha, 0x0198,
6188                         "Unable to initialize lun_qpair_map btree\n");
6189                 return -EIO;
6190         }
6191         h = &tgt->qphints[0];
6192         h->qpair = ha->base_qpair;
6193         INIT_LIST_HEAD(&h->hint_elem);
6194         h->cpuid = ha->base_qpair->cpuid;
6195         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6196
6197         for (i = 0; i < ha->max_qpairs; i++) {
6198                 unsigned long flags;
6199
6200                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6201                 h = &tgt->qphints[i + 1];
6202                 INIT_LIST_HEAD(&h->hint_elem);
6203                 if (qpair) {
6204                         h->qpair = qpair;
6205                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6206                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6207                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6208                         h->cpuid = qpair->cpuid;
6209                 }
6210         }
6211
6212         tgt->ha = ha;
6213         tgt->vha = base_vha;
6214         init_waitqueue_head(&tgt->waitQ);
6215         INIT_LIST_HEAD(&tgt->del_sess_list);
6216         spin_lock_init(&tgt->sess_work_lock);
6217         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6218         INIT_LIST_HEAD(&tgt->sess_works_list);
6219         atomic_set(&tgt->tgt_global_resets_count, 0);
6220
6221         base_vha->vha_tgt.qla_tgt = tgt;
6222
6223         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6224                 "qla_target(%d): using 64 Bit PCI addressing",
6225                 base_vha->vp_idx);
6226         /* 3 is reserved */
6227         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6228
6229         mutex_lock(&qla_tgt_mutex);
6230         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6231         mutex_unlock(&qla_tgt_mutex);
6232
6233         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6234                 ha->tgt.tgt_ops->add_target(base_vha);
6235
6236         return 0;
6237 }
6238
6239 /* Must be called under tgt_host_action_mutex */
6240 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6241 {
6242         if (!vha->vha_tgt.qla_tgt)
6243                 return 0;
6244
6245         if (vha->fc_vport) {
6246                 qlt_release(vha->vha_tgt.qla_tgt);
6247                 return 0;
6248         }
6249
6250         /* free left over qfull cmds */
6251         qlt_init_term_exchange(vha);
6252
6253         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6254             vha->host_no, ha);
6255         qlt_release(vha->vha_tgt.qla_tgt);
6256
6257         return 0;
6258 }
6259
6260 void qlt_remove_target_resources(struct qla_hw_data *ha)
6261 {
6262         struct scsi_qla_host *node;
6263         u32 key = 0;
6264
6265         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6266                 btree_remove32(&ha->tgt.host_map, key);
6267
6268         btree_destroy32(&ha->tgt.host_map);
6269 }
6270
6271 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6272         unsigned char *b)
6273 {
6274         int i;
6275
6276         pr_debug("qla2xxx HW vha->node_name: ");
6277         for (i = 0; i < WWN_SIZE; i++)
6278                 pr_debug("%02x ", vha->node_name[i]);
6279         pr_debug("\n");
6280         pr_debug("qla2xxx HW vha->port_name: ");
6281         for (i = 0; i < WWN_SIZE; i++)
6282                 pr_debug("%02x ", vha->port_name[i]);
6283         pr_debug("\n");
6284
6285         pr_debug("qla2xxx passed configfs WWPN: ");
6286         put_unaligned_be64(wwpn, b);
6287         for (i = 0; i < WWN_SIZE; i++)
6288                 pr_debug("%02x ", b[i]);
6289         pr_debug("\n");
6290 }
6291
6292 /**
6293  * qla_tgt_lport_register - register lport with external module
6294  *
6295  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6296  * @wwpn: Passwd FC target WWPN
6297  * @callback:  lport initialization callback for tcm_qla2xxx code
6298  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6299  */
6300 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6301                        u64 npiv_wwpn, u64 npiv_wwnn,
6302                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6303 {
6304         struct qla_tgt *tgt;
6305         struct scsi_qla_host *vha;
6306         struct qla_hw_data *ha;
6307         struct Scsi_Host *host;
6308         unsigned long flags;
6309         int rc;
6310         u8 b[WWN_SIZE];
6311
6312         mutex_lock(&qla_tgt_mutex);
6313         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6314                 vha = tgt->vha;
6315                 ha = vha->hw;
6316
6317                 host = vha->host;
6318                 if (!host)
6319                         continue;
6320
6321                 if (!(host->hostt->supported_mode & MODE_TARGET))
6322                         continue;
6323
6324                 spin_lock_irqsave(&ha->hardware_lock, flags);
6325                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6326                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6327                             host->host_no);
6328                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6329                         continue;
6330                 }
6331                 if (tgt->tgt_stop) {
6332                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6333                                  host->host_no);
6334                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6335                         continue;
6336                 }
6337                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6338
6339                 if (!scsi_host_get(host)) {
6340                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6341                             "Unable to scsi_host_get() for"
6342                             " qla2xxx scsi_host\n");
6343                         continue;
6344                 }
6345                 qlt_lport_dump(vha, phys_wwpn, b);
6346
6347                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6348                         scsi_host_put(host);
6349                         continue;
6350                 }
6351                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6352                 if (rc != 0)
6353                         scsi_host_put(host);
6354
6355                 mutex_unlock(&qla_tgt_mutex);
6356                 return rc;
6357         }
6358         mutex_unlock(&qla_tgt_mutex);
6359
6360         return -ENODEV;
6361 }
6362 EXPORT_SYMBOL(qlt_lport_register);
6363
6364 /**
6365  * qla_tgt_lport_deregister - Degister lport
6366  *
6367  * @vha:  Registered scsi_qla_host pointer
6368  */
6369 void qlt_lport_deregister(struct scsi_qla_host *vha)
6370 {
6371         struct qla_hw_data *ha = vha->hw;
6372         struct Scsi_Host *sh = vha->host;
6373         /*
6374          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6375          */
6376         vha->vha_tgt.target_lport_ptr = NULL;
6377         ha->tgt.tgt_ops = NULL;
6378         /*
6379          * Release the Scsi_Host reference for the underlying qla2xxx host
6380          */
6381         scsi_host_put(sh);
6382 }
6383 EXPORT_SYMBOL(qlt_lport_deregister);
6384
6385 /* Must be called under HW lock */
6386 static void qlt_set_mode(struct scsi_qla_host *vha)
6387 {
6388         switch (ql2x_ini_mode) {
6389         case QLA2XXX_INI_MODE_DISABLED:
6390         case QLA2XXX_INI_MODE_EXCLUSIVE:
6391                 vha->host->active_mode = MODE_TARGET;
6392                 break;
6393         case QLA2XXX_INI_MODE_ENABLED:
6394                 vha->host->active_mode = MODE_UNKNOWN;
6395                 break;
6396         case QLA2XXX_INI_MODE_DUAL:
6397                 vha->host->active_mode = MODE_DUAL;
6398                 break;
6399         default:
6400                 break;
6401         }
6402 }
6403
6404 /* Must be called under HW lock */
6405 static void qlt_clear_mode(struct scsi_qla_host *vha)
6406 {
6407         switch (ql2x_ini_mode) {
6408         case QLA2XXX_INI_MODE_DISABLED:
6409                 vha->host->active_mode = MODE_UNKNOWN;
6410                 break;
6411         case QLA2XXX_INI_MODE_EXCLUSIVE:
6412                 vha->host->active_mode = MODE_INITIATOR;
6413                 break;
6414         case QLA2XXX_INI_MODE_ENABLED:
6415         case QLA2XXX_INI_MODE_DUAL:
6416                 vha->host->active_mode = MODE_INITIATOR;
6417                 break;
6418         default:
6419                 break;
6420         }
6421 }
6422
6423 /*
6424  * qla_tgt_enable_vha - NO LOCK HELD
6425  *
6426  * host_reset, bring up w/ Target Mode Enabled
6427  */
6428 void
6429 qlt_enable_vha(struct scsi_qla_host *vha)
6430 {
6431         struct qla_hw_data *ha = vha->hw;
6432         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6433         unsigned long flags;
6434         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6435
6436         if (!tgt) {
6437                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6438                     "Unable to locate qla_tgt pointer from"
6439                     " struct qla_hw_data\n");
6440                 dump_stack();
6441                 return;
6442         }
6443
6444         spin_lock_irqsave(&ha->hardware_lock, flags);
6445         tgt->tgt_stopped = 0;
6446         qlt_set_mode(vha);
6447         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6448
6449         if (vha->vp_idx) {
6450                 qla24xx_disable_vp(vha);
6451                 qla24xx_enable_vp(vha);
6452         } else {
6453                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6454                 qla2xxx_wake_dpc(base_vha);
6455                 qla2x00_wait_for_hba_online(base_vha);
6456         }
6457 }
6458 EXPORT_SYMBOL(qlt_enable_vha);
6459
6460 /*
6461  * qla_tgt_disable_vha - NO LOCK HELD
6462  *
6463  * Disable Target Mode and reset the adapter
6464  */
6465 static void qlt_disable_vha(struct scsi_qla_host *vha)
6466 {
6467         struct qla_hw_data *ha = vha->hw;
6468         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6469         unsigned long flags;
6470
6471         if (!tgt) {
6472                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6473                     "Unable to locate qla_tgt pointer from"
6474                     " struct qla_hw_data\n");
6475                 dump_stack();
6476                 return;
6477         }
6478
6479         spin_lock_irqsave(&ha->hardware_lock, flags);
6480         qlt_clear_mode(vha);
6481         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6482
6483         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6484         qla2xxx_wake_dpc(vha);
6485         qla2x00_wait_for_hba_online(vha);
6486 }
6487
6488 /*
6489  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6490  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6491  * members.
6492  */
6493 void
6494 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6495 {
6496         vha->vha_tgt.qla_tgt = NULL;
6497
6498         mutex_init(&vha->vha_tgt.tgt_mutex);
6499         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6500
6501         qlt_clear_mode(vha);
6502
6503         /*
6504          * NOTE: Currently the value is kept the same for <24xx and
6505          * >=24xx ISPs. If it is necessary to change it,
6506          * the check should be added for specific ISPs,
6507          * assigning the value appropriately.
6508          */
6509         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6510
6511         qlt_add_target(ha, vha);
6512 }
6513
6514 u8
6515 qlt_rff_id(struct scsi_qla_host *vha)
6516 {
6517         u8 fc4_feature = 0;
6518         /*
6519          * FC-4 Feature bit 0 indicates target functionality to the name server.
6520          */
6521         if (qla_tgt_mode_enabled(vha)) {
6522                 fc4_feature = BIT_0;
6523         } else if (qla_ini_mode_enabled(vha)) {
6524                 fc4_feature = BIT_1;
6525         } else if (qla_dual_mode_enabled(vha))
6526                 fc4_feature = BIT_0 | BIT_1;
6527
6528         return fc4_feature;
6529 }
6530
6531 /*
6532  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6533  * @ha: HA context
6534  *
6535  * Beginning of ATIO ring has initialization control block already built
6536  * by nvram config routine.
6537  *
6538  * Returns 0 on success.
6539  */
6540 void
6541 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6542 {
6543         struct qla_hw_data *ha = vha->hw;
6544         uint16_t cnt;
6545         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6546
6547         if (qla_ini_mode_enabled(vha))
6548                 return;
6549
6550         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6551                 pkt->u.raw.signature = ATIO_PROCESSED;
6552                 pkt++;
6553         }
6554
6555 }
6556
6557 /*
6558  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6559  * @ha: SCSI driver HA context
6560  */
6561 void
6562 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6563 {
6564         struct qla_hw_data *ha = vha->hw;
6565         struct atio_from_isp *pkt;
6566         int cnt, i;
6567
6568         if (!ha->flags.fw_started)
6569                 return;
6570
6571         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6572             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6573                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6574                 cnt = pkt->u.raw.entry_count;
6575
6576                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6577                         /*
6578                          * This packet is corrupted. The header + payload
6579                          * can not be trusted. There is no point in passing
6580                          * it further up.
6581                          */
6582                         ql_log(ql_log_warn, vha, 0xd03c,
6583                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6584                             pkt->u.isp24.fcp_hdr.s_id,
6585                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6586                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6587
6588                         adjust_corrupted_atio(pkt);
6589                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6590                             ha_locked, 0);
6591                 } else {
6592                         qlt_24xx_atio_pkt_all_vps(vha,
6593                             (struct atio_from_isp *)pkt, ha_locked);
6594                 }
6595
6596                 for (i = 0; i < cnt; i++) {
6597                         ha->tgt.atio_ring_index++;
6598                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6599                                 ha->tgt.atio_ring_index = 0;
6600                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6601                         } else
6602                                 ha->tgt.atio_ring_ptr++;
6603
6604                         pkt->u.raw.signature = ATIO_PROCESSED;
6605                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6606                 }
6607                 wmb();
6608         }
6609
6610         /* Adjust ring index */
6611         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6612 }
6613
6614 void
6615 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6616 {
6617         struct qla_hw_data *ha = vha->hw;
6618         struct qla_msix_entry *msix = &ha->msix_entries[2];
6619         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6620
6621         if (!QLA_TGT_MODE_ENABLED())
6622                 return;
6623
6624         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6625         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6626         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6627
6628         if (ha->flags.msix_enabled) {
6629                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6630                         if (IS_QLA2071(ha)) {
6631                                 /* 4 ports Baker: Enable Interrupt Handshake */
6632                                 icb->msix_atio = 0;
6633                                 icb->firmware_options_2 |= BIT_26;
6634                         } else {
6635                                 icb->msix_atio = cpu_to_le16(msix->entry);
6636                                 icb->firmware_options_2 &= ~BIT_26;
6637                         }
6638                         ql_dbg(ql_dbg_init, vha, 0xf072,
6639                             "Registering ICB vector 0x%x for atio que.\n",
6640                             msix->entry);
6641                 }
6642         } else {
6643                 /* INTx|MSI */
6644                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6645                         icb->msix_atio = 0;
6646                         icb->firmware_options_2 |= BIT_26;
6647                         ql_dbg(ql_dbg_init, vha, 0xf072,
6648                             "%s: Use INTx for ATIOQ.\n", __func__);
6649                 }
6650         }
6651 }
6652
6653 void
6654 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6655 {
6656         struct qla_hw_data *ha = vha->hw;
6657         u32 tmp;
6658
6659         if (!QLA_TGT_MODE_ENABLED())
6660                 return;
6661
6662         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6663                 if (!ha->tgt.saved_set) {
6664                         /* We save only once */
6665                         ha->tgt.saved_exchange_count = nv->exchange_count;
6666                         ha->tgt.saved_firmware_options_1 =
6667                             nv->firmware_options_1;
6668                         ha->tgt.saved_firmware_options_2 =
6669                             nv->firmware_options_2;
6670                         ha->tgt.saved_firmware_options_3 =
6671                             nv->firmware_options_3;
6672                         ha->tgt.saved_set = 1;
6673                 }
6674
6675                 if (qla_tgt_mode_enabled(vha))
6676                         nv->exchange_count = cpu_to_le16(0xFFFF);
6677                 else                    /* dual */
6678                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6679
6680                 /* Enable target mode */
6681                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6682
6683                 /* Disable ini mode, if requested */
6684                 if (qla_tgt_mode_enabled(vha))
6685                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6686
6687                 /* Disable Full Login after LIP */
6688                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6689                 /* Enable initial LIP */
6690                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6691                 if (ql2xtgt_tape_enable)
6692                         /* Enable FC Tape support */
6693                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6694                 else
6695                         /* Disable FC Tape support */
6696                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6697
6698                 /* Disable Full Login after LIP */
6699                 nv->host_p &= cpu_to_le32(~BIT_10);
6700
6701                 /*
6702                  * clear BIT 15 explicitly as we have seen at least
6703                  * a couple of instances where this was set and this
6704                  * was causing the firmware to not be initialized.
6705                  */
6706                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6707                 /* Enable target PRLI control */
6708                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6709
6710                 if (IS_QLA25XX(ha)) {
6711                         /* Change Loop-prefer to Pt-Pt */
6712                         tmp = ~(BIT_4|BIT_5|BIT_6);
6713                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6714                         tmp = P2P << 4;
6715                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6716                 }
6717         } else {
6718                 if (ha->tgt.saved_set) {
6719                         nv->exchange_count = ha->tgt.saved_exchange_count;
6720                         nv->firmware_options_1 =
6721                             ha->tgt.saved_firmware_options_1;
6722                         nv->firmware_options_2 =
6723                             ha->tgt.saved_firmware_options_2;
6724                         nv->firmware_options_3 =
6725                             ha->tgt.saved_firmware_options_3;
6726                 }
6727                 return;
6728         }
6729
6730         if (ha->base_qpair->enable_class_2) {
6731                 if (vha->flags.init_done)
6732                         fc_host_supported_classes(vha->host) =
6733                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6734
6735                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6736         } else {
6737                 if (vha->flags.init_done)
6738                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6739
6740                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6741         }
6742 }
6743
6744 void
6745 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6746         struct init_cb_24xx *icb)
6747 {
6748         struct qla_hw_data *ha = vha->hw;
6749
6750         if (!QLA_TGT_MODE_ENABLED())
6751                 return;
6752
6753         if (ha->tgt.node_name_set) {
6754                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6755                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6756         }
6757
6758         /* disable ZIO at start time. */
6759         if (!vha->flags.init_done) {
6760                 uint32_t tmp;
6761                 tmp = le32_to_cpu(icb->firmware_options_2);
6762                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6763                 icb->firmware_options_2 = cpu_to_le32(tmp);
6764         }
6765 }
6766
6767 void
6768 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6769 {
6770         struct qla_hw_data *ha = vha->hw;
6771         u32 tmp;
6772
6773         if (!QLA_TGT_MODE_ENABLED())
6774                 return;
6775
6776         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6777                 if (!ha->tgt.saved_set) {
6778                         /* We save only once */
6779                         ha->tgt.saved_exchange_count = nv->exchange_count;
6780                         ha->tgt.saved_firmware_options_1 =
6781                             nv->firmware_options_1;
6782                         ha->tgt.saved_firmware_options_2 =
6783                             nv->firmware_options_2;
6784                         ha->tgt.saved_firmware_options_3 =
6785                             nv->firmware_options_3;
6786                         ha->tgt.saved_set = 1;
6787                 }
6788
6789                 if (qla_tgt_mode_enabled(vha))
6790                         nv->exchange_count = cpu_to_le16(0xFFFF);
6791                 else                    /* dual */
6792                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6793
6794                 /* Enable target mode */
6795                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6796
6797                 /* Disable ini mode, if requested */
6798                 if (qla_tgt_mode_enabled(vha))
6799                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6800                 /* Disable Full Login after LIP */
6801                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6802                 /* Enable initial LIP */
6803                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6804                 /*
6805                  * clear BIT 15 explicitly as we have seen at
6806                  * least a couple of instances where this was set
6807                  * and this was causing the firmware to not be
6808                  * initialized.
6809                  */
6810                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6811                 if (ql2xtgt_tape_enable)
6812                         /* Enable FC tape support */
6813                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6814                 else
6815                         /* Disable FC tape support */
6816                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6817
6818                 /* Disable Full Login after LIP */
6819                 nv->host_p &= cpu_to_le32(~BIT_10);
6820                 /* Enable target PRLI control */
6821                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6822
6823                 /* Change Loop-prefer to Pt-Pt */
6824                 tmp = ~(BIT_4|BIT_5|BIT_6);
6825                 nv->firmware_options_2 &= cpu_to_le32(tmp);
6826                 tmp = P2P << 4;
6827                 nv->firmware_options_2 |= cpu_to_le32(tmp);
6828         } else {
6829                 if (ha->tgt.saved_set) {
6830                         nv->exchange_count = ha->tgt.saved_exchange_count;
6831                         nv->firmware_options_1 =
6832                             ha->tgt.saved_firmware_options_1;
6833                         nv->firmware_options_2 =
6834                             ha->tgt.saved_firmware_options_2;
6835                         nv->firmware_options_3 =
6836                             ha->tgt.saved_firmware_options_3;
6837                 }
6838                 return;
6839         }
6840
6841         if (ha->base_qpair->enable_class_2) {
6842                 if (vha->flags.init_done)
6843                         fc_host_supported_classes(vha->host) =
6844                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6845
6846                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6847         } else {
6848                 if (vha->flags.init_done)
6849                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6850
6851                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6852         }
6853 }
6854
6855 void
6856 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6857         struct init_cb_81xx *icb)
6858 {
6859         struct qla_hw_data *ha = vha->hw;
6860
6861         if (!QLA_TGT_MODE_ENABLED())
6862                 return;
6863
6864         if (ha->tgt.node_name_set) {
6865                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6866                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6867         }
6868
6869         /* disable ZIO at start time. */
6870         if (!vha->flags.init_done) {
6871                 uint32_t tmp;
6872                 tmp = le32_to_cpu(icb->firmware_options_2);
6873                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6874                 icb->firmware_options_2 = cpu_to_le32(tmp);
6875         }
6876
6877 }
6878
6879 void
6880 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6881 {
6882         if (!QLA_TGT_MODE_ENABLED())
6883                 return;
6884
6885         ha->msix_count += 1; /* For ATIO Q */
6886 }
6887
6888
6889 void
6890 qlt_modify_vp_config(struct scsi_qla_host *vha,
6891         struct vp_config_entry_24xx *vpmod)
6892 {
6893         /* enable target mode.  Bit5 = 1 => disable */
6894         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6895                 vpmod->options_idx1 &= ~BIT_5;
6896
6897         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6898         if (qla_tgt_mode_enabled(vha))
6899                 vpmod->options_idx1 &= ~BIT_4;
6900 }
6901
6902 void
6903 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6904 {
6905         int rc;
6906
6907         if (!QLA_TGT_MODE_ENABLED())
6908                 return;
6909
6910         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6911                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6912                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6913         } else {
6914                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6915                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6916         }
6917
6918         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6919         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6920
6921         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6922         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6923             qlt_unknown_atio_work_fn);
6924
6925         qlt_clear_mode(base_vha);
6926
6927         rc = btree_init32(&ha->tgt.host_map);
6928         if (rc)
6929                 ql_log(ql_log_info, base_vha, 0xd03d,
6930                     "Unable to initialize ha->host_map btree\n");
6931
6932         qlt_update_vp_map(base_vha, SET_VP_IDX);
6933 }
6934
6935 irqreturn_t
6936 qla83xx_msix_atio_q(int irq, void *dev_id)
6937 {
6938         struct rsp_que *rsp;
6939         scsi_qla_host_t *vha;
6940         struct qla_hw_data *ha;
6941         unsigned long flags;
6942
6943         rsp = (struct rsp_que *) dev_id;
6944         ha = rsp->hw;
6945         vha = pci_get_drvdata(ha->pdev);
6946
6947         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6948
6949         qlt_24xx_process_atio_queue(vha, 0);
6950
6951         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6952
6953         return IRQ_HANDLED;
6954 }
6955
6956 static void
6957 qlt_handle_abts_recv_work(struct work_struct *work)
6958 {
6959         struct qla_tgt_sess_op *op = container_of(work,
6960                 struct qla_tgt_sess_op, work);
6961         scsi_qla_host_t *vha = op->vha;
6962         struct qla_hw_data *ha = vha->hw;
6963         unsigned long flags;
6964
6965         if (qla2x00_reset_active(vha) ||
6966             (op->chip_reset != ha->base_qpair->chip_reset))
6967                 return;
6968
6969         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6970         qlt_24xx_process_atio_queue(vha, 0);
6971         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6972
6973         spin_lock_irqsave(&ha->hardware_lock, flags);
6974         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6975         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6976
6977         kfree(op);
6978 }
6979
6980 void
6981 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
6982     response_t *pkt)
6983 {
6984         struct qla_tgt_sess_op *op;
6985
6986         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6987
6988         if (!op) {
6989                 /* do not reach for ATIO queue here.  This is best effort err
6990                  * recovery at this point.
6991                  */
6992                 qlt_response_pkt_all_vps(vha, rsp, pkt);
6993                 return;
6994         }
6995
6996         memcpy(&op->atio, pkt, sizeof(*pkt));
6997         op->vha = vha;
6998         op->chip_reset = vha->hw->base_qpair->chip_reset;
6999         op->rsp = rsp;
7000         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7001         queue_work(qla_tgt_wq, &op->work);
7002         return;
7003 }
7004
7005 int
7006 qlt_mem_alloc(struct qla_hw_data *ha)
7007 {
7008         if (!QLA_TGT_MODE_ENABLED())
7009                 return 0;
7010
7011         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
7012             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
7013         if (!ha->tgt.tgt_vp_map)
7014                 return -ENOMEM;
7015
7016         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7017             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7018             &ha->tgt.atio_dma, GFP_KERNEL);
7019         if (!ha->tgt.atio_ring) {
7020                 kfree(ha->tgt.tgt_vp_map);
7021                 return -ENOMEM;
7022         }
7023         return 0;
7024 }
7025
7026 void
7027 qlt_mem_free(struct qla_hw_data *ha)
7028 {
7029         if (!QLA_TGT_MODE_ENABLED())
7030                 return;
7031
7032         if (ha->tgt.atio_ring) {
7033                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7034                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7035                     ha->tgt.atio_dma);
7036         }
7037         kfree(ha->tgt.tgt_vp_map);
7038 }
7039
7040 /* vport_slock to be held by the caller */
7041 void
7042 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7043 {
7044         void *slot;
7045         u32 key;
7046         int rc;
7047
7048         if (!QLA_TGT_MODE_ENABLED())
7049                 return;
7050
7051         key = vha->d_id.b24;
7052
7053         switch (cmd) {
7054         case SET_VP_IDX:
7055                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7056                 break;
7057         case SET_AL_PA:
7058                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7059                 if (!slot) {
7060                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7061                             "Save vha in host_map %p %06x\n", vha, key);
7062                         rc = btree_insert32(&vha->hw->tgt.host_map,
7063                                 key, vha, GFP_ATOMIC);
7064                         if (rc)
7065                                 ql_log(ql_log_info, vha, 0xd03e,
7066                                     "Unable to insert s_id into host_map: %06x\n",
7067                                     key);
7068                         return;
7069                 }
7070                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7071                     "replace existing vha in host_map %p %06x\n", vha, key);
7072                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7073                 break;
7074         case RESET_VP_IDX:
7075                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7076                 break;
7077         case RESET_AL_PA:
7078                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7079                    "clear vha in host_map %p %06x\n", vha, key);
7080                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7081                 if (slot)
7082                         btree_remove32(&vha->hw->tgt.host_map, key);
7083                 vha->d_id.b24 = 0;
7084                 break;
7085         }
7086 }
7087
7088 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7089 {
7090
7091         if (!vha->d_id.b24) {
7092                 vha->d_id = id;
7093                 qlt_update_vp_map(vha, SET_AL_PA);
7094         } else if (vha->d_id.b24 != id.b24) {
7095                 qlt_update_vp_map(vha, RESET_AL_PA);
7096                 vha->d_id = id;
7097                 qlt_update_vp_map(vha, SET_AL_PA);
7098         }
7099 }
7100
7101 static int __init qlt_parse_ini_mode(void)
7102 {
7103         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7104                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7105         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7106                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7107         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7108                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7109         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7110                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7111         else
7112                 return false;
7113
7114         return true;
7115 }
7116
7117 int __init qlt_init(void)
7118 {
7119         int ret;
7120
7121         if (!qlt_parse_ini_mode()) {
7122                 ql_log(ql_log_fatal, NULL, 0xe06b,
7123                     "qlt_parse_ini_mode() failed\n");
7124                 return -EINVAL;
7125         }
7126
7127         if (!QLA_TGT_MODE_ENABLED())
7128                 return 0;
7129
7130         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7131             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7132             qla_tgt_mgmt_cmd), 0, NULL);
7133         if (!qla_tgt_mgmt_cmd_cachep) {
7134                 ql_log(ql_log_fatal, NULL, 0xd04b,
7135                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7136                 return -ENOMEM;
7137         }
7138
7139         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7140             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7141             0, NULL);
7142
7143         if (!qla_tgt_plogi_cachep) {
7144                 ql_log(ql_log_fatal, NULL, 0xe06d,
7145                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7146                 ret = -ENOMEM;
7147                 goto out_mgmt_cmd_cachep;
7148         }
7149
7150         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7151             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7152         if (!qla_tgt_mgmt_cmd_mempool) {
7153                 ql_log(ql_log_fatal, NULL, 0xe06e,
7154                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7155                 ret = -ENOMEM;
7156                 goto out_plogi_cachep;
7157         }
7158
7159         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7160         if (!qla_tgt_wq) {
7161                 ql_log(ql_log_fatal, NULL, 0xe06f,
7162                     "alloc_workqueue for qla_tgt_wq failed\n");
7163                 ret = -ENOMEM;
7164                 goto out_cmd_mempool;
7165         }
7166         /*
7167          * Return 1 to signal that initiator-mode is being disabled
7168          */
7169         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7170
7171 out_cmd_mempool:
7172         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7173 out_plogi_cachep:
7174         kmem_cache_destroy(qla_tgt_plogi_cachep);
7175 out_mgmt_cmd_cachep:
7176         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7177         return ret;
7178 }
7179
7180 void qlt_exit(void)
7181 {
7182         if (!QLA_TGT_MODE_ENABLED())
7183                 return;
7184
7185         destroy_workqueue(qla_tgt_wq);
7186         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7187         kmem_cache_destroy(qla_tgt_plogi_cachep);
7188         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7189 }