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 temp_sam_status = SAM_STAT_BUSY;
  79
  80 /*
  81  * From scsi/fc/fc_fcp.h
  82  */
  83 enum fcp_resp_rsp_codes {
  84         FCP_TMF_CMPL = 0,
  85         FCP_DATA_LEN_INVALID = 1,
  86         FCP_CMND_FIELDS_INVALID = 2,
  87         FCP_DATA_PARAM_MISMATCH = 3,
  88         FCP_TMF_REJECTED = 4,
  89         FCP_TMF_FAILED = 5,
  90         FCP_TMF_INVALID_LUN = 9,
  91 };
  92
  93 /*
  94  * fc_pri_ta from scsi/fc/fc_fcp.h
  95  */
  96 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  97 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  98 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  99 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 100 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 101 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 102 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 103
 104 /*
 105  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 106  * must be called under HW lock and could unlock/lock it inside.
 107  * It isn't an issue, since in the current implementation on the time when
 108  * those functions are called:
 109  *
 110  *   - Either context is IRQ and only IRQ handler can modify HW data,
 111  *     including rings related fields,
 112  *
 113  *   - Or access to target mode variables from struct qla_tgt doesn't
 114  *     cross those functions boundaries, except tgt_stop, which
 115  *     additionally protected by irq_cmd_count.
 116  */
 117 /* Predefs for callbacks handed to qla2xxx LLD */
 118 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 119         struct atio_from_isp *pkt, uint8_t);
 120 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 121         response_t *pkt);
 122 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 123         int fn, void *iocb, int flags);
 124 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 125         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 126 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 127         struct atio_from_isp *atio, uint16_t status, int qfull);
 128 static void qlt_disable_vha(struct scsi_qla_host *vha);
 129 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 130 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 131         struct imm_ntfy_from_isp *ntfy,
 132         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 133         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 134 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 135         struct imm_ntfy_from_isp *imm, int ha_locked);
 136 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 137         fc_port_t *fcport, bool local);
 138 void qlt_unreg_sess(struct fc_port *sess);
 139 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 140         struct abts_recv_from_24xx *);
 141 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 142     uint16_t);
 143
 144 /*
 145  * Global Variables
 146  */
 147 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 148 struct kmem_cache *qla_tgt_plogi_cachep;
 149 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 150 static struct workqueue_struct *qla_tgt_wq;
 151 static DEFINE_MUTEX(qla_tgt_mutex);
 152 static LIST_HEAD(qla_tgt_glist);
 153
 154 static const char *prot_op_str(u32 prot_op)
 155 {
 156         switch (prot_op) {
 157         case TARGET_PROT_NORMAL:        return "NORMAL";
 158         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 159         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 160         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 161         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 162         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 163         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 164         default:                        return "UNKNOWN";
 165         }
 166 }
 167
 168 /* This API intentionally takes dest as a parameter, rather than returning
 169  * int value to avoid caller forgetting to issue wmb() after the store */
 170 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 171 {
 172         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 173         *dest = atomic_inc_return(&base_vha->generation_tick);
 174         /* memory barrier */
 175         wmb();
 176 }
 177
 178 /* Might release hw lock, then reaquire!! */
 179 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 180 {
 181         /* Send marker if required */
 182         if (unlikely(vha->marker_needed != 0)) {
 183                 int rc = qla2x00_issue_marker(vha, vha_locked);
 184                 if (rc != QLA_SUCCESS) {
 185                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 186                             "qla_target(%d): issue_marker() failed\n",
 187                             vha->vp_idx);
 188                 }
 189                 return rc;
 190         }
 191         return QLA_SUCCESS;
 192 }
 193
 194 static inline
 195 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 196         uint8_t *d_id)
 197 {
 198         struct scsi_qla_host *host;
 199         uint32_t key = 0;
 200
 201         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 202             (vha->d_id.b.al_pa == d_id[2]))
 203                 return vha;
 204
 205         key  = (uint32_t)d_id[0] << 16;
 206         key |= (uint32_t)d_id[1] <<  8;
 207         key |= (uint32_t)d_id[2];
 208
 209         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 210         if (!host)
 211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 212                     "Unable to find host %06x\n", key);
 213
 214         return host;
 215 }
 216
 217 static inline
 218 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 219         uint16_t vp_idx)
 220 {
 221         struct qla_hw_data *ha = vha->hw;
 222
 223         if (vha->vp_idx == vp_idx)
 224                 return vha;
 225
 226         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 227         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 228                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 229
 230         return NULL;
 231 }
 232
 233 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 234 {
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 238
 239         vha->hw->tgt.num_pend_cmds++;
 240         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 241                 vha->qla_stats.stat_max_pend_cmds =
 242                         vha->hw->tgt.num_pend_cmds;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 246 {
 247         unsigned long flags;
 248
 249         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 250         vha->hw->tgt.num_pend_cmds--;
 251         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 252 }
 253
 254
 255 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 256         struct atio_from_isp *atio, uint8_t ha_locked)
 257 {
 258         struct qla_tgt_sess_op *u;
 259         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 260         unsigned long flags;
 261
 262         if (tgt->tgt_stop) {
 263                 ql_dbg(ql_dbg_async, vha, 0x502c,
 264                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 265                     vha->vp_idx);
 266                 goto out_term;
 267         }
 268
 269         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 270         if (u == NULL)
 271                 goto out_term;
 272
 273         u->vha = vha;
 274         memcpy(&u->atio, atio, sizeof(*atio));
 275         INIT_LIST_HEAD(&u->cmd_list);
 276
 277         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 278         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 279         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 280
 281         schedule_delayed_work(&vha->unknown_atio_work, 1);
 282
 283 out:
 284         return;
 285
 286 out_term:
 287         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 288         goto out;
 289 }
 290
 291 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 292         uint8_t ha_locked)
 293 {
 294         struct qla_tgt_sess_op *u, *t;
 295         scsi_qla_host_t *host;
 296         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 297         unsigned long flags;
 298         uint8_t queued = 0;
 299
 300         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 301                 if (u->aborted) {
 302                         ql_dbg(ql_dbg_async, vha, 0x502e,
 303                             "Freeing unknown %s %p, because of Abort\n",
 304                             "ATIO_TYPE7", u);
 305                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 306                             &u->atio, ha_locked, 0);
 307                         goto abort;
 308                 }
 309
 310                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 311                 if (host != NULL) {
 312                         ql_dbg(ql_dbg_async, vha, 0x502f,
 313                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 314                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 315                 } else if (tgt->tgt_stop) {
 316                         ql_dbg(ql_dbg_async, vha, 0x503a,
 317                             "Freeing unknown %s %p, because tgt is being stopped\n",
 318                             "ATIO_TYPE7", u);
 319                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 320                             &u->atio, ha_locked, 0);
 321                 } else {
 322                         ql_dbg(ql_dbg_async, vha, 0x503d,
 323                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 324                         if (!queued) {
 325                                 queued = 1;
 326                                 schedule_delayed_work(&vha->unknown_atio_work,
 327                                     1);
 328                         }
 329                         continue;
 330                 }
 331
 332 abort:
 333                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 334                 list_del(&u->cmd_list);
 335                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 336                 kfree(u);
 337         }
 338 }
 339
 340 void qlt_unknown_atio_work_fn(struct work_struct *work)
 341 {
 342         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 343             struct scsi_qla_host, unknown_atio_work);
 344
 345         qlt_try_to_dequeue_unknown_atios(vha, 0);
 346 }
 347
 348 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 349         struct atio_from_isp *atio, uint8_t ha_locked)
 350 {
 351         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 352                 "%s: qla_target(%d): type %x ox_id %04x\n",
 353                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 354                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 355
 356         switch (atio->u.raw.entry_type) {
 357         case ATIO_TYPE7:
 358         {
 359                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 360                     atio->u.isp24.fcp_hdr.d_id);
 361                 if (unlikely(NULL == host)) {
 362                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 363                             "qla_target(%d): Received ATIO_TYPE7 "
 364                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 365                             atio->u.isp24.fcp_hdr.d_id[0],
 366                             atio->u.isp24.fcp_hdr.d_id[1],
 367                             atio->u.isp24.fcp_hdr.d_id[2]);
 368
 369
 370                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 371                         break;
 372                 }
 373                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 374                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 375
 376                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 377                 break;
 378         }
 379
 380         case IMMED_NOTIFY_TYPE:
 381         {
 382                 struct scsi_qla_host *host = vha;
 383                 struct imm_ntfy_from_isp *entry =
 384                     (struct imm_ntfy_from_isp *)atio;
 385
 386                 qlt_issue_marker(vha, ha_locked);
 387
 388                 if ((entry->u.isp24.vp_index != 0xFF) &&
 389                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 390                         host = qlt_find_host_by_vp_idx(vha,
 391                             entry->u.isp24.vp_index);
 392                         if (unlikely(!host)) {
 393                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 394                                     "qla_target(%d): Received "
 395                                     "ATIO (IMMED_NOTIFY_TYPE) "
 396                                     "with unknown vp_index %d\n",
 397                                     vha->vp_idx, entry->u.isp24.vp_index);
 398                                 break;
 399                         }
 400                 }
 401                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 402                 break;
 403         }
 404
 405         case VP_RPT_ID_IOCB_TYPE:
 406                 qla24xx_report_id_acquisition(vha,
 407                         (struct vp_rpt_id_entry_24xx *)atio);
 408                 break;
 409
 410         case ABTS_RECV_24XX:
 411         {
 412                 struct abts_recv_from_24xx *entry =
 413                         (struct abts_recv_from_24xx *)atio;
 414                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 415                         entry->vp_index);
 416                 unsigned long flags;
 417
 418                 if (unlikely(!host)) {
 419                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 420                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 421                             "received, with unknown vp_index %d\n",
 422                             vha->vp_idx, entry->vp_index);
 423                         break;
 424                 }
 425                 if (!ha_locked)
 426                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 427                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 428                 if (!ha_locked)
 429                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 430                 break;
 431         }
 432
 433         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 434
 435         default:
 436                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 437                     "qla_target(%d): Received unknown ATIO atio "
 438                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 439                 break;
 440         }
 441
 442         return false;
 443 }
 444
 445 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 446         struct rsp_que *rsp, response_t *pkt)
 447 {
 448         switch (pkt->entry_type) {
 449         case CTIO_CRC2:
 450                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 451                         "qla_target(%d):%s: CRC2 Response pkt\n",
 452                         vha->vp_idx, __func__);
 453         case CTIO_TYPE7:
 454         {
 455                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 456                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 457                     entry->vp_index);
 458                 if (unlikely(!host)) {
 459                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 460                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 461                             "received, with unknown vp_index %d\n",
 462                             vha->vp_idx, entry->vp_index);
 463                         break;
 464                 }
 465                 qlt_response_pkt(host, rsp, pkt);
 466                 break;
 467         }
 468
 469         case IMMED_NOTIFY_TYPE:
 470         {
 471                 struct scsi_qla_host *host = vha;
 472                 struct imm_ntfy_from_isp *entry =
 473                     (struct imm_ntfy_from_isp *)pkt;
 474
 475                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 476                 if (unlikely(!host)) {
 477                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 478                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 479                             "received, with unknown vp_index %d\n",
 480                             vha->vp_idx, entry->u.isp24.vp_index);
 481                         break;
 482                 }
 483                 qlt_response_pkt(host, rsp, pkt);
 484                 break;
 485         }
 486
 487         case NOTIFY_ACK_TYPE:
 488         {
 489                 struct scsi_qla_host *host = vha;
 490                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 491
 492                 if (0xFF != entry->u.isp24.vp_index) {
 493                         host = qlt_find_host_by_vp_idx(vha,
 494                             entry->u.isp24.vp_index);
 495                         if (unlikely(!host)) {
 496                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 497                                     "qla_target(%d): Response "
 498                                     "pkt (NOTIFY_ACK_TYPE) "
 499                                     "received, with unknown "
 500                                     "vp_index %d\n", vha->vp_idx,
 501                                     entry->u.isp24.vp_index);
 502                                 break;
 503                         }
 504                 }
 505                 qlt_response_pkt(host, rsp, pkt);
 506                 break;
 507         }
 508
 509         case ABTS_RECV_24XX:
 510         {
 511                 struct abts_recv_from_24xx *entry =
 512                     (struct abts_recv_from_24xx *)pkt;
 513                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 514                     entry->vp_index);
 515                 if (unlikely(!host)) {
 516                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 517                             "qla_target(%d): Response pkt "
 518                             "(ABTS_RECV_24XX) received, with unknown "
 519                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 520                         break;
 521                 }
 522                 qlt_response_pkt(host, rsp, pkt);
 523                 break;
 524         }
 525
 526         case ABTS_RESP_24XX:
 527         {
 528                 struct abts_resp_to_24xx *entry =
 529                     (struct abts_resp_to_24xx *)pkt;
 530                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 531                     entry->vp_index);
 532                 if (unlikely(!host)) {
 533                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 534                             "qla_target(%d): Response pkt "
 535                             "(ABTS_RECV_24XX) received, with unknown "
 536                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 537                         break;
 538                 }
 539                 qlt_response_pkt(host, rsp, pkt);
 540                 break;
 541         }
 542
 543         default:
 544                 qlt_response_pkt(vha, rsp, pkt);
 545                 break;
 546         }
 547
 548 }
 549
 550 /*
 551  * All qlt_plogi_ack_t operations are protected by hardware_lock
 552  */
 553 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 554         struct imm_ntfy_from_isp *ntfy, int type)
 555 {
 556         struct qla_work_evt *e;
 557         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 558         if (!e)
 559                 return QLA_FUNCTION_FAILED;
 560
 561         e->u.nack.fcport = fcport;
 562         e->u.nack.type = type;
 563         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 564         return qla2x00_post_work(vha, e);
 565 }
 566
 567 static
 568 void qla2x00_async_nack_sp_done(void *s, int res)
 569 {
 570         struct srb *sp = (struct srb *)s;
 571         struct scsi_qla_host *vha = sp->vha;
 572         unsigned long flags;
 573
 574         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 575             "Async done-%s res %x %8phC  type %d\n",
 576             sp->name, res, sp->fcport->port_name, sp->type);
 577
 578         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 579         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 580         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 581
 582         switch (sp->type) {
 583         case SRB_NACK_PLOGI:
 584                 sp->fcport->login_gen++;
 585                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 586                 sp->fcport->logout_on_delete = 1;
 587                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 588                 sp->fcport->send_els_logo = 0;
 589                 break;
 590
 591         case SRB_NACK_PRLI:
 592                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 593                 sp->fcport->deleted = 0;
 594                 sp->fcport->send_els_logo = 0;
 595
 596                 if (!sp->fcport->login_succ &&
 597                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 598                         sp->fcport->login_succ = 1;
 599
 600                         vha->fcport_count++;
 601
 602                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 603                             !vha->hw->flags.gpsc_supported) {
 604                                 ql_dbg(ql_dbg_disc, vha, 0x20f3,
 605                                     "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 606                                     __func__, __LINE__,
 607                                     sp->fcport->port_name,
 608                                     vha->fcport_count);
 609
 610                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 611                         } else {
 612                                 ql_dbg(ql_dbg_disc, vha, 0x20f5,
 613                                     "%s %d %8phC post gpsc fcp_cnt %d\n",
 614                                     __func__, __LINE__,
 615                                     sp->fcport->port_name,
 616                                     vha->fcport_count);
 617
 618                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 619                         }
 620                 }
 621                 break;
 622
 623         case SRB_NACK_LOGO:
 624                 sp->fcport->login_gen++;
 625                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 626                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 627                 break;
 628         }
 629         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 630
 631         sp->free(sp);
 632 }
 633
 634 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 635         struct imm_ntfy_from_isp *ntfy, int type)
 636 {
 637         int rval = QLA_FUNCTION_FAILED;
 638         srb_t *sp;
 639         char *c = NULL;
 640
 641         fcport->flags |= FCF_ASYNC_SENT;
 642         switch (type) {
 643         case SRB_NACK_PLOGI:
 644                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 645                 c = "PLOGI";
 646                 break;
 647         case SRB_NACK_PRLI:
 648                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 649                 fcport->deleted = 0;
 650                 c = "PRLI";
 651                 break;
 652         case SRB_NACK_LOGO:
 653                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 654                 c = "LOGO";
 655                 break;
 656         }
 657
 658         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 659         if (!sp)
 660                 goto done;
 661
 662         sp->type = type;
 663         sp->name = "nack";
 664
 665         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 666
 667         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 668
 669         sp->done = qla2x00_async_nack_sp_done;
 670
 671         rval = qla2x00_start_sp(sp);
 672         if (rval != QLA_SUCCESS)
 673                 goto done_free_sp;
 674
 675         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 676             "Async-%s %8phC hndl %x %s\n",
 677             sp->name, fcport->port_name, sp->handle, c);
 678
 679         return rval;
 680
 681 done_free_sp:
 682         sp->free(sp);
 683 done:
 684         fcport->flags &= ~FCF_ASYNC_SENT;
 685         return rval;
 686 }
 687
 688 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 689 {
 690         fc_port_t *t;
 691         unsigned long flags;
 692
 693         switch (e->u.nack.type) {
 694         case SRB_NACK_PRLI:
 695                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 696                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 697                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 698                 if (t) {
 699                         ql_log(ql_log_info, vha, 0xd034,
 700                             "%s create sess success %p", __func__, t);
 701                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 702                         /* create sess has an extra kref */
 703                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 704                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 705                 }
 706                 break;
 707         }
 708         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 709             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 710 }
 711
 712 void qla24xx_delete_sess_fn(struct work_struct *work)
 713 {
 714         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 715         struct qla_hw_data *ha = fcport->vha->hw;
 716         unsigned long flags;
 717
 718         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 719
 720         if (fcport->se_sess) {
 721                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 722                 ha->tgt.tgt_ops->put_sess(fcport);
 723         } else {
 724                 qlt_unreg_sess(fcport);
 725         }
 726         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 727 }
 728
 729 /*
 730  * Called from qla2x00_reg_remote_port()
 731  */
 732 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 733 {
 734         struct qla_hw_data *ha = vha->hw;
 735         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 736         struct fc_port *sess = fcport;
 737         unsigned long flags;
 738
 739         if (!vha->hw->tgt.tgt_ops)
 740                 return;
 741
 742         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 743         if (tgt->tgt_stop) {
 744                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 745                 return;
 746         }
 747
 748         if (fcport->disc_state == DSC_DELETE_PEND) {
 749                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 750                 return;
 751         }
 752
 753         if (!sess->se_sess) {
 754                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 755
 756                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 757                 sess = qlt_create_sess(vha, fcport, false);
 758                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 759
 760                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 761         } else {
 762                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 763                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 764                         return;
 765                 }
 766
 767                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 768                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 769                             "%s: kref_get fail sess %8phC \n",
 770                             __func__, sess->port_name);
 771                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 772                         return;
 773                 }
 774
 775                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 776                     "qla_target(%u): %ssession for port %8phC "
 777                     "(loop ID %d) reappeared\n", vha->vp_idx,
 778                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 779
 780                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 781                     "Reappeared sess %p\n", sess);
 782
 783                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 784                     fcport->loop_id,
 785                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 786         }
 787
 788         if (sess && sess->local) {
 789                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 790                     "qla_target(%u): local session for "
 791                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 792                     fcport->port_name, sess->loop_id);
 793                 sess->local = 0;
 794         }
 795         ha->tgt.tgt_ops->put_sess(sess);
 796         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 797 }
 798
 799 /*
 800  * This is a zero-base ref-counting solution, since hardware_lock
 801  * guarantees that ref_count is not modified concurrently.
 802  * Upon successful return content of iocb is undefined
 803  */
 804 static struct qlt_plogi_ack_t *
 805 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 806                        struct imm_ntfy_from_isp *iocb)
 807 {
 808         struct qlt_plogi_ack_t *pla;
 809
 810         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 811                 if (pla->id.b24 == id->b24) {
 812                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 813                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 814                         return pla;
 815                 }
 816         }
 817
 818         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 819         if (!pla) {
 820                 ql_dbg(ql_dbg_async, vha, 0x5088,
 821                        "qla_target(%d): Allocation of plogi_ack failed\n",
 822                        vha->vp_idx);
 823                 return NULL;
 824         }
 825
 826         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 827         pla->id = *id;
 828         list_add_tail(&pla->list, &vha->plogi_ack_list);
 829
 830         return pla;
 831 }
 832
 833 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 834     struct qlt_plogi_ack_t *pla)
 835 {
 836         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 837         port_id_t port_id;
 838         uint16_t loop_id;
 839         fc_port_t *fcport = pla->fcport;
 840
 841         BUG_ON(!pla->ref_count);
 842         pla->ref_count--;
 843
 844         if (pla->ref_count)
 845                 return;
 846
 847         ql_dbg(ql_dbg_disc, vha, 0x5089,
 848             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 849             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 850             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 851             iocb->u.isp24.port_id[0],
 852             le16_to_cpu(iocb->u.isp24.nport_handle),
 853             iocb->u.isp24.exchange_address, iocb->ox_id);
 854
 855         port_id.b.domain = iocb->u.isp24.port_id[2];
 856         port_id.b.area   = iocb->u.isp24.port_id[1];
 857         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 858         port_id.b.rsvd_1 = 0;
 859
 860         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 861
 862         fcport->loop_id = loop_id;
 863         fcport->d_id = port_id;
 864         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 865
 866         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 867                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 868                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 869                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 870                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 871         }
 872
 873         list_del(&pla->list);
 874         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 875 }
 876
 877 void
 878 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 879     struct fc_port *sess, enum qlt_plogi_link_t link)
 880 {
 881         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 882         /* Inc ref_count first because link might already be pointing at pla */
 883         pla->ref_count++;
 884
 885         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 886                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 887                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 888                 sess, link, sess->port_name,
 889                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 890                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 891                 pla->ref_count, pla, link);
 892
 893         if (sess->plogi_link[link])
 894                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 895
 896         if (link == QLT_PLOGI_LINK_SAME_WWN)
 897                 pla->fcport = sess;
 898
 899         sess->plogi_link[link] = pla;
 900 }
 901
 902 typedef struct {
 903         /* These fields must be initialized by the caller */
 904         port_id_t id;
 905         /*
 906          * number of cmds dropped while we were waiting for
 907          * initiator to ack LOGO initialize to 1 if LOGO is
 908          * triggered by a command, otherwise, to 0
 909          */
 910         int cmd_count;
 911
 912         /* These fields are used by callee */
 913         struct list_head list;
 914 } qlt_port_logo_t;
 915
 916 static void
 917 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 918 {
 919         qlt_port_logo_t *tmp;
 920         int res;
 921
 922         mutex_lock(&vha->vha_tgt.tgt_mutex);
 923
 924         list_for_each_entry(tmp, &vha->logo_list, list) {
 925                 if (tmp->id.b24 == logo->id.b24) {
 926                         tmp->cmd_count += logo->cmd_count;
 927                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 928                         return;
 929                 }
 930         }
 931
 932         list_add_tail(&logo->list, &vha->logo_list);
 933
 934         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 935
 936         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 937
 938         mutex_lock(&vha->vha_tgt.tgt_mutex);
 939         list_del(&logo->list);
 940         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 941
 942         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 943             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 944             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 945             logo->cmd_count, res);
 946 }
 947
 948 static void qlt_free_session_done(struct work_struct *work)
 949 {
 950         struct fc_port *sess = container_of(work, struct fc_port,
 951             free_work);
 952         struct qla_tgt *tgt = sess->tgt;
 953         struct scsi_qla_host *vha = sess->vha;
 954         struct qla_hw_data *ha = vha->hw;
 955         unsigned long flags;
 956         bool logout_started = false;
 957         struct event_arg ea;
 958         scsi_qla_host_t *base_vha;
 959
 960         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 961                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 962                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 963                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 964                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 965                 sess->logout_on_delete, sess->keep_nport_handle,
 966                 sess->send_els_logo);
 967
 968         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 969                 if (sess->send_els_logo) {
 970                         qlt_port_logo_t logo;
 971
 972                         logo.id = sess->d_id;
 973                         logo.cmd_count = 0;
 974                         qlt_send_first_logo(vha, &logo);
 975                 }
 976
 977                 if (sess->logout_on_delete) {
 978                         int rc;
 979
 980                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 981                         if (rc != QLA_SUCCESS)
 982                                 ql_log(ql_log_warn, vha, 0xf085,
 983                                     "Schedule logo failed sess %p rc %d\n",
 984                                     sess, rc);
 985                         else
 986                                 logout_started = true;
 987                 }
 988         }
 989
 990         /*
 991          * Release the target session for FC Nexus from fabric module code.
 992          */
 993         if (sess->se_sess != NULL)
 994                 ha->tgt.tgt_ops->free_session(sess);
 995
 996         if (logout_started) {
 997                 bool traced = false;
 998
 999                 while (!ACCESS_ONCE(sess->logout_completed)) {
1000                         if (!traced) {
1001                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1002                                         "%s: waiting for sess %p logout\n",
1003                                         __func__, sess);
1004                                 traced = true;
1005                         }
1006                         msleep(100);
1007                 }
1008
1009                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1010                     "%s: sess %p logout completed\n",__func__, sess);
1011         }
1012
1013         if (sess->logo_ack_needed) {
1014                 sess->logo_ack_needed = 0;
1015                 qla24xx_async_notify_ack(vha, sess,
1016                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1017         }
1018
1019         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1020         if (sess->se_sess) {
1021                 sess->se_sess = NULL;
1022                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1023                         tgt->sess_count--;
1024         }
1025
1026         sess->disc_state = DSC_DELETED;
1027         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1028         sess->deleted = QLA_SESS_DELETED;
1029         sess->login_retry = vha->hw->login_retry_count;
1030
1031         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1032                 vha->fcport_count--;
1033                 sess->login_succ = 0;
1034         }
1035
1036         if (sess->chip_reset != ha->base_qpair->chip_reset)
1037                 qla2x00_clear_loop_id(sess);
1038
1039         if (sess->conflict) {
1040                 sess->conflict->login_pause = 0;
1041                 sess->conflict = NULL;
1042                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1043                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1044         }
1045
1046         {
1047                 struct qlt_plogi_ack_t *own =
1048                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1049                 struct qlt_plogi_ack_t *con =
1050                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1051                 struct imm_ntfy_from_isp *iocb;
1052
1053                 if (con) {
1054                         iocb = &con->iocb;
1055                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1056                                  "se_sess %p / sess %p port %8phC is gone,"
1057                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1058                                  sess->se_sess, sess, sess->port_name,
1059                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1060                                  own ? own->ref_count : -1,
1061                                  iocb->u.isp24.port_name, con->ref_count);
1062                         qlt_plogi_ack_unref(vha, con);
1063                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1064                 } else {
1065                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1066                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1067                             sess->se_sess, sess, sess->port_name,
1068                             own ? "releasing own PLOGI" :
1069                             "no own PLOGI pending",
1070                             own ? own->ref_count : -1);
1071                 }
1072
1073                 if (own) {
1074                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1075                         qlt_plogi_ack_unref(vha, own);
1076                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1077                 }
1078         }
1079         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1080
1081         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1082             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1083                 sess, sess->port_name, vha->fcport_count);
1084
1085         if (tgt && (tgt->sess_count == 0))
1086                 wake_up_all(&tgt->waitQ);
1087
1088         if (vha->fcport_count == 0)
1089                 wake_up_all(&vha->fcport_waitQ);
1090
1091         base_vha = pci_get_drvdata(ha->pdev);
1092         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1093                 return;
1094
1095         if (!tgt || !tgt->tgt_stop) {
1096                 memset(&ea, 0, sizeof(ea));
1097                 ea.event = FCME_DELETE_DONE;
1098                 ea.fcport = sess;
1099                 qla2x00_fcport_event_handler(vha, &ea);
1100         }
1101 }
1102
1103 /* ha->tgt.sess_lock supposed to be held on entry */
1104 void qlt_unreg_sess(struct fc_port *sess)
1105 {
1106         struct scsi_qla_host *vha = sess->vha;
1107
1108         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1109             "%s sess %p for deletion %8phC\n",
1110             __func__, sess, sess->port_name);
1111
1112         if (sess->se_sess)
1113                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1114
1115         qla2x00_mark_device_lost(vha, sess, 1, 1);
1116
1117         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1118         sess->disc_state = DSC_DELETE_PEND;
1119         sess->last_rscn_gen = sess->rscn_gen;
1120         sess->last_login_gen = sess->login_gen;
1121
1122         if (sess->nvme_flag & NVME_FLAG_REGISTERED)
1123                 schedule_work(&sess->nvme_del_work);
1124
1125         INIT_WORK(&sess->free_work, qlt_free_session_done);
1126         schedule_work(&sess->free_work);
1127 }
1128 EXPORT_SYMBOL(qlt_unreg_sess);
1129
1130 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1131 {
1132         struct qla_hw_data *ha = vha->hw;
1133         struct fc_port *sess = NULL;
1134         uint16_t loop_id;
1135         int res = 0;
1136         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1137         unsigned long flags;
1138
1139         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1140         if (loop_id == 0xFFFF) {
1141                 /* Global event */
1142                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1143                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1144                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1145                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1146         } else {
1147                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1148                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1149                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1150         }
1151
1152         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1153             "Using sess for qla_tgt_reset: %p\n", sess);
1154         if (!sess) {
1155                 res = -ESRCH;
1156                 return res;
1157         }
1158
1159         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1160             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1161             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1162             mcmd, loop_id);
1163
1164         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1165 }
1166
1167 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1168 {
1169         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1170                 sess->logout_on_delete = 0;
1171                 sess->logo_ack_needed = 0;
1172                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1173                 sess->scan_state = 0;
1174         }
1175 }
1176
1177 /* ha->tgt.sess_lock supposed to be held on entry */
1178 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1179         bool immediate)
1180 {
1181         struct qla_tgt *tgt = sess->tgt;
1182
1183         if (sess->disc_state == DSC_DELETE_PEND)
1184                 return;
1185
1186         if (sess->disc_state == DSC_DELETED) {
1187                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1188                         wake_up_all(&tgt->waitQ);
1189                 if (sess->vha->fcport_count == 0)
1190                         wake_up_all(&sess->vha->fcport_waitQ);
1191
1192                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1193                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1194                         return;
1195         }
1196
1197         sess->disc_state = DSC_DELETE_PEND;
1198
1199         if (sess->deleted == QLA_SESS_DELETED)
1200                 sess->logout_on_delete = 0;
1201
1202         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1203         qla24xx_chk_fcp_state(sess);
1204
1205         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1206             "Scheduling sess %p for deletion\n", sess);
1207
1208         schedule_work(&sess->del_work);
1209 }
1210
1211 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1212 {
1213         unsigned long flags;
1214         struct qla_hw_data *ha = sess->vha->hw;
1215         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1216         qlt_schedule_sess_for_deletion(sess, 1);
1217         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1218 }
1219
1220 /* ha->tgt.sess_lock supposed to be held on entry */
1221 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1222 {
1223         struct fc_port *sess;
1224         scsi_qla_host_t *vha = tgt->vha;
1225
1226         list_for_each_entry(sess, &vha->vp_fcports, list) {
1227                 if (sess->se_sess)
1228                         qlt_schedule_sess_for_deletion(sess, 1);
1229         }
1230
1231         /* At this point tgt could be already dead */
1232 }
1233
1234 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1235         uint16_t *loop_id)
1236 {
1237         struct qla_hw_data *ha = vha->hw;
1238         dma_addr_t gid_list_dma;
1239         struct gid_list_info *gid_list;
1240         char *id_iter;
1241         int res, rc, i;
1242         uint16_t entries;
1243
1244         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1245             &gid_list_dma, GFP_KERNEL);
1246         if (!gid_list) {
1247                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1248                     "qla_target(%d): DMA Alloc failed of %u\n",
1249                     vha->vp_idx, qla2x00_gid_list_size(ha));
1250                 return -ENOMEM;
1251         }
1252
1253         /* Get list of logged in devices */
1254         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1255         if (rc != QLA_SUCCESS) {
1256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1257                     "qla_target(%d): get_id_list() failed: %x\n",
1258                     vha->vp_idx, rc);
1259                 res = -EBUSY;
1260                 goto out_free_id_list;
1261         }
1262
1263         id_iter = (char *)gid_list;
1264         res = -ENOENT;
1265         for (i = 0; i < entries; i++) {
1266                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1267                 if ((gid->al_pa == s_id[2]) &&
1268                     (gid->area == s_id[1]) &&
1269                     (gid->domain == s_id[0])) {
1270                         *loop_id = le16_to_cpu(gid->loop_id);
1271                         res = 0;
1272                         break;
1273                 }
1274                 id_iter += ha->gid_list_info_size;
1275         }
1276
1277 out_free_id_list:
1278         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1279             gid_list, gid_list_dma);
1280         return res;
1281 }
1282
1283 /*
1284  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1285  * Caller must put it.
1286  */
1287 static struct fc_port *qlt_create_sess(
1288         struct scsi_qla_host *vha,
1289         fc_port_t *fcport,
1290         bool local)
1291 {
1292         struct qla_hw_data *ha = vha->hw;
1293         struct fc_port *sess = fcport;
1294         unsigned long flags;
1295
1296         if (vha->vha_tgt.qla_tgt->tgt_stop)
1297                 return NULL;
1298
1299         if (fcport->se_sess) {
1300                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1301                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1302                             "%s: kref_get_unless_zero failed for %8phC\n",
1303                             __func__, sess->port_name);
1304                         return NULL;
1305                 }
1306                 return fcport;
1307         }
1308         sess->tgt = vha->vha_tgt.qla_tgt;
1309         sess->local = local;
1310
1311         /*
1312          * Under normal circumstances we want to logout from firmware when
1313          * session eventually ends and release corresponding nport handle.
1314          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1315          * code will adjust these flags as necessary.
1316          */
1317         sess->logout_on_delete = 1;
1318         sess->keep_nport_handle = 0;
1319         sess->logout_completed = 0;
1320
1321         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1322             &fcport->port_name[0], sess) < 0) {
1323                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1324                     "(%d) %8phC check_initiator_node_acl failed\n",
1325                     vha->vp_idx, fcport->port_name);
1326                 return NULL;
1327         } else {
1328                 kref_init(&fcport->sess_kref);
1329                 /*
1330                  * Take an extra reference to ->sess_kref here to handle
1331                  * fc_port access across ->tgt.sess_lock reaquire.
1332                  */
1333                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1334                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1335                             "%s: kref_get_unless_zero failed for %8phC\n",
1336                             __func__, sess->port_name);
1337                         return NULL;
1338                 }
1339
1340                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1341                 if (!IS_SW_RESV_ADDR(sess->d_id))
1342                         vha->vha_tgt.qla_tgt->sess_count++;
1343
1344                 qlt_do_generation_tick(vha, &sess->generation);
1345                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1346         }
1347
1348         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1349             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1350             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1351             vha->vha_tgt.qla_tgt->sess_count);
1352
1353         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1354             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1355             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1356             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1357             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1358             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1359
1360         return sess;
1361 }
1362
1363 /*
1364  * max_gen - specifies maximum session generation
1365  * at which this deletion requestion is still valid
1366  */
1367 void
1368 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1369 {
1370         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1371         struct fc_port *sess = fcport;
1372         unsigned long flags;
1373
1374         if (!vha->hw->tgt.tgt_ops)
1375                 return;
1376
1377         if (!tgt)
1378                 return;
1379
1380         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1381         if (tgt->tgt_stop) {
1382                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1383                 return;
1384         }
1385         if (!sess->se_sess) {
1386                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1387                 return;
1388         }
1389
1390         if (max_gen - sess->generation < 0) {
1391                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1392                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1393                     "Ignoring stale deletion request for se_sess %p / sess %p"
1394                     " for port %8phC, req_gen %d, sess_gen %d\n",
1395                     sess->se_sess, sess, sess->port_name, max_gen,
1396                     sess->generation);
1397                 return;
1398         }
1399
1400         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1401
1402         sess->local = 1;
1403         qlt_schedule_sess_for_deletion(sess, false);
1404         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1405 }
1406
1407 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1408 {
1409         struct qla_hw_data *ha = tgt->ha;
1410         unsigned long flags;
1411         int res;
1412         /*
1413          * We need to protect against race, when tgt is freed before or
1414          * inside wake_up()
1415          */
1416         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1417         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1418             "tgt %p, sess_count=%d\n",
1419             tgt, tgt->sess_count);
1420         res = (tgt->sess_count == 0);
1421         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1422
1423         return res;
1424 }
1425
1426 /* Called by tcm_qla2xxx configfs code */
1427 int qlt_stop_phase1(struct qla_tgt *tgt)
1428 {
1429         struct scsi_qla_host *vha = tgt->vha;
1430         struct qla_hw_data *ha = tgt->ha;
1431         unsigned long flags;
1432
1433         mutex_lock(&qla_tgt_mutex);
1434         if (!vha->fc_vport) {
1435                 struct Scsi_Host *sh = vha->host;
1436                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1437                 bool npiv_vports;
1438
1439                 spin_lock_irqsave(sh->host_lock, flags);
1440                 npiv_vports = (fc_host->npiv_vports_inuse);
1441                 spin_unlock_irqrestore(sh->host_lock, flags);
1442
1443                 if (npiv_vports) {
1444                         mutex_unlock(&qla_tgt_mutex);
1445                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1446                             "NPIV is in use. Can not stop target\n");
1447                         return -EPERM;
1448                 }
1449         }
1450         if (tgt->tgt_stop || tgt->tgt_stopped) {
1451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1452                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1453                 mutex_unlock(&qla_tgt_mutex);
1454                 return -EPERM;
1455         }
1456
1457         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1458             vha->host_no, vha);
1459         /*
1460          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1461          * Lock is needed, because we still can get an incoming packet.
1462          */
1463         mutex_lock(&vha->vha_tgt.tgt_mutex);
1464         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1465         tgt->tgt_stop = 1;
1466         qlt_clear_tgt_db(tgt);
1467         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1468         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1469         mutex_unlock(&qla_tgt_mutex);
1470
1471         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1472             "Waiting for sess works (tgt %p)", tgt);
1473         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1474         while (!list_empty(&tgt->sess_works_list)) {
1475                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1476                 flush_scheduled_work();
1477                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1478         }
1479         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1480
1481         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1482             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1483
1484         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1485
1486         /* Big hammer */
1487         if (!ha->flags.host_shutting_down &&
1488             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1489                 qlt_disable_vha(vha);
1490
1491         /* Wait for sessions to clear out (just in case) */
1492         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1493         return 0;
1494 }
1495 EXPORT_SYMBOL(qlt_stop_phase1);
1496
1497 /* Called by tcm_qla2xxx configfs code */
1498 void qlt_stop_phase2(struct qla_tgt *tgt)
1499 {
1500         scsi_qla_host_t *vha = tgt->vha;
1501
1502         if (tgt->tgt_stopped) {
1503                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1504                     "Already in tgt->tgt_stopped state\n");
1505                 dump_stack();
1506                 return;
1507         }
1508         if (!tgt->tgt_stop) {
1509                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1510                     "%s: phase1 stop is not completed\n", __func__);
1511                 dump_stack();
1512                 return;
1513         }
1514
1515         mutex_lock(&vha->vha_tgt.tgt_mutex);
1516         tgt->tgt_stop = 0;
1517         tgt->tgt_stopped = 1;
1518         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1519
1520         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1521             tgt);
1522 }
1523 EXPORT_SYMBOL(qlt_stop_phase2);
1524
1525 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1526 static void qlt_release(struct qla_tgt *tgt)
1527 {
1528         scsi_qla_host_t *vha = tgt->vha;
1529         void *node;
1530         u64 key = 0;
1531         u16 i;
1532         struct qla_qpair_hint *h;
1533         struct qla_hw_data *ha = vha->hw;
1534
1535         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1536             !tgt->tgt_stopped)
1537                 qlt_stop_phase1(tgt);
1538
1539         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1540                 qlt_stop_phase2(tgt);
1541
1542         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1543                 unsigned long flags;
1544
1545                 h = &tgt->qphints[i];
1546                 if (h->qpair) {
1547                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1548                         list_del(&h->hint_elem);
1549                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1550                         h->qpair = NULL;
1551                 }
1552         }
1553         kfree(tgt->qphints);
1554         mutex_lock(&qla_tgt_mutex);
1555         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1556         mutex_unlock(&qla_tgt_mutex);
1557
1558         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1559                 btree_remove64(&tgt->lun_qpair_map, key);
1560
1561         btree_destroy64(&tgt->lun_qpair_map);
1562
1563         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->remove_target)
1564                 ha->tgt.tgt_ops->remove_target(vha);
1565
1566         vha->vha_tgt.qla_tgt = NULL;
1567
1568         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1569             "Release of tgt %p finished\n", tgt);
1570
1571         kfree(tgt);
1572 }
1573
1574 /* ha->hardware_lock supposed to be held on entry */
1575 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1576         const void *param, unsigned int param_size)
1577 {
1578         struct qla_tgt_sess_work_param *prm;
1579         unsigned long flags;
1580
1581         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1582         if (!prm) {
1583                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1584                     "qla_target(%d): Unable to create session "
1585                     "work, command will be refused", 0);
1586                 return -ENOMEM;
1587         }
1588
1589         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1590             "Scheduling work (type %d, prm %p)"
1591             " to find session for param %p (size %d, tgt %p)\n",
1592             type, prm, param, param_size, tgt);
1593
1594         prm->type = type;
1595         memcpy(&prm->tm_iocb, param, param_size);
1596
1597         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1598         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1599         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1600
1601         schedule_work(&tgt->sess_work);
1602
1603         return 0;
1604 }
1605
1606 /*
1607  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1608  */
1609 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1610         struct imm_ntfy_from_isp *ntfy,
1611         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1612         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1613 {
1614         struct scsi_qla_host *vha = qpair->vha;
1615         struct qla_hw_data *ha = vha->hw;
1616         request_t *pkt;
1617         struct nack_to_isp *nack;
1618
1619         if (!ha->flags.fw_started)
1620                 return;
1621
1622         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1623
1624         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1625         if (!pkt) {
1626                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1627                     "qla_target(%d): %s failed: unable to allocate "
1628                     "request packet\n", vha->vp_idx, __func__);
1629                 return;
1630         }
1631
1632         if (vha->vha_tgt.qla_tgt != NULL)
1633                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1634
1635         pkt->entry_type = NOTIFY_ACK_TYPE;
1636         pkt->entry_count = 1;
1637
1638         nack = (struct nack_to_isp *)pkt;
1639         nack->ox_id = ntfy->ox_id;
1640
1641         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1642         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1643         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1644                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1645                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1646         }
1647         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1648         nack->u.isp24.status = ntfy->u.isp24.status;
1649         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1650         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1651         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1652         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1653         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1654         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1655         nack->u.isp24.srr_reject_code = srr_reject_code;
1656         nack->u.isp24.srr_reject_code_expl = srr_explan;
1657         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1658
1659         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1660             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1661             vha->vp_idx, nack->u.isp24.status);
1662
1663         /* Memory Barrier */
1664         wmb();
1665         qla2x00_start_iocbs(vha, qpair->req);
1666 }
1667
1668 /*
1669  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1670  */
1671 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1672         struct abts_recv_from_24xx *abts, uint32_t status,
1673         bool ids_reversed)
1674 {
1675         struct scsi_qla_host *vha = qpair->vha;
1676         struct qla_hw_data *ha = vha->hw;
1677         struct abts_resp_to_24xx *resp;
1678         uint32_t f_ctl;
1679         uint8_t *p;
1680
1681         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1682             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1683             ha, abts, status);
1684
1685         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1686             NULL);
1687         if (!resp) {
1688                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1689                     "qla_target(%d): %s failed: unable to allocate "
1690                     "request packet", vha->vp_idx, __func__);
1691                 return;
1692         }
1693
1694         resp->entry_type = ABTS_RESP_24XX;
1695         resp->entry_count = 1;
1696         resp->nport_handle = abts->nport_handle;
1697         resp->vp_index = vha->vp_idx;
1698         resp->sof_type = abts->sof_type;
1699         resp->exchange_address = abts->exchange_address;
1700         resp->fcp_hdr_le = abts->fcp_hdr_le;
1701         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1702             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1703             F_CTL_SEQ_INITIATIVE);
1704         p = (uint8_t *)&f_ctl;
1705         resp->fcp_hdr_le.f_ctl[0] = *p++;
1706         resp->fcp_hdr_le.f_ctl[1] = *p++;
1707         resp->fcp_hdr_le.f_ctl[2] = *p;
1708         if (ids_reversed) {
1709                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1710                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1711                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1712                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1713                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1714                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1715         } else {
1716                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1717                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1718                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1719                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1720                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1721                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1722         }
1723         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1724         if (status == FCP_TMF_CMPL) {
1725                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1726                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1727                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1728                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1729                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1730                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1731         } else {
1732                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1733                 resp->payload.ba_rjt.reason_code =
1734                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1735                 /* Other bytes are zero */
1736         }
1737
1738         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1739
1740         /* Memory Barrier */
1741         wmb();
1742         if (qpair->reqq_start_iocbs)
1743                 qpair->reqq_start_iocbs(qpair);
1744         else
1745                 qla2x00_start_iocbs(vha, qpair->req);
1746 }
1747
1748 /*
1749  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1750  */
1751 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1752         struct abts_resp_from_24xx_fw *entry)
1753 {
1754         struct ctio7_to_24xx *ctio;
1755
1756         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1757             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1758
1759         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1760             vha->hw->base_qpair, NULL);
1761         if (ctio == NULL) {
1762                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1763                     "qla_target(%d): %s failed: unable to allocate "
1764                     "request packet\n", vha->vp_idx, __func__);
1765                 return;
1766         }
1767
1768         /*
1769          * We've got on entrance firmware's response on by us generated
1770          * ABTS response. So, in it ID fields are reversed.
1771          */
1772
1773         ctio->entry_type = CTIO_TYPE7;
1774         ctio->entry_count = 1;
1775         ctio->nport_handle = entry->nport_handle;
1776         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1777         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1778         ctio->vp_index = vha->vp_idx;
1779         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1780         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1781         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1782         ctio->exchange_addr = entry->exchange_addr_to_abort;
1783         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1784                                             CTIO7_FLAGS_TERMINATE);
1785         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1786
1787         /* Memory Barrier */
1788         wmb();
1789         qla2x00_start_iocbs(vha, vha->req);
1790
1791         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1792             (struct abts_recv_from_24xx *)entry,
1793             FCP_TMF_CMPL, true);
1794 }
1795
1796 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1797 {
1798         struct qla_tgt_sess_op *op;
1799         struct qla_tgt_cmd *cmd;
1800         unsigned long flags;
1801
1802         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1803         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1804                 if (tag == op->atio.u.isp24.exchange_addr) {
1805                         op->aborted = true;
1806                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1807                         return 1;
1808                 }
1809         }
1810
1811         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1812                 if (tag == op->atio.u.isp24.exchange_addr) {
1813                         op->aborted = true;
1814                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1815                         return 1;
1816                 }
1817         }
1818
1819         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1820                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1821                         cmd->aborted = 1;
1822                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1823                         return 1;
1824                 }
1825         }
1826         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1827
1828         return 0;
1829 }
1830
1831 /* drop cmds for the given lun
1832  * XXX only looks for cmds on the port through which lun reset was recieved
1833  * XXX does not go through the list of other port (which may have cmds
1834  *     for the same lun)
1835  */
1836 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1837                                 u64 lun, uint8_t *s_id)
1838 {
1839         struct qla_tgt_sess_op *op;
1840         struct qla_tgt_cmd *cmd;
1841         uint32_t key;
1842         unsigned long flags;
1843
1844         key = sid_to_key(s_id);
1845         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1846         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1847                 uint32_t op_key;
1848                 u64 op_lun;
1849
1850                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1851                 op_lun = scsilun_to_int(
1852                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1853                 if (op_key == key && op_lun == lun)
1854                         op->aborted = true;
1855         }
1856
1857         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1858                 uint32_t op_key;
1859                 u64 op_lun;
1860
1861                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1862                 op_lun = scsilun_to_int(
1863                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1864                 if (op_key == key && op_lun == lun)
1865                         op->aborted = true;
1866         }
1867
1868         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1869                 uint32_t cmd_key;
1870                 u64 cmd_lun;
1871
1872                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1873                 cmd_lun = scsilun_to_int(
1874                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1875                 if (cmd_key == key && cmd_lun == lun)
1876                         cmd->aborted = 1;
1877         }
1878         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1879 }
1880
1881 /* ha->hardware_lock supposed to be held on entry */
1882 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1883         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1884 {
1885         struct qla_hw_data *ha = vha->hw;
1886         struct qla_tgt_mgmt_cmd *mcmd;
1887         int rc;
1888
1889         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1890                 /* send TASK_ABORT response immediately */
1891                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1892                 return 0;
1893         }
1894
1895         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1896             "qla_target(%d): task abort (tag=%d)\n",
1897             vha->vp_idx, abts->exchange_addr_to_abort);
1898
1899         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1900         if (mcmd == NULL) {
1901                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1902                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1903                     vha->vp_idx, __func__);
1904                 return -ENOMEM;
1905         }
1906         memset(mcmd, 0, sizeof(*mcmd));
1907
1908         mcmd->sess = sess;
1909         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1910         mcmd->reset_count = ha->base_qpair->chip_reset;
1911         mcmd->tmr_func = QLA_TGT_ABTS;
1912         mcmd->qpair = ha->base_qpair;
1913         mcmd->vha = vha;
1914
1915         /*
1916          * LUN is looked up by target-core internally based on the passed
1917          * abts->exchange_addr_to_abort tag.
1918          */
1919         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1920             abts->exchange_addr_to_abort);
1921         if (rc != 0) {
1922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1923                     "qla_target(%d):  tgt_ops->handle_tmr()"
1924                     " failed: %d", vha->vp_idx, rc);
1925                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1926                 return -EFAULT;
1927         }
1928
1929         return 0;
1930 }
1931
1932 /*
1933  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1934  */
1935 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1936         struct abts_recv_from_24xx *abts)
1937 {
1938         struct qla_hw_data *ha = vha->hw;
1939         struct fc_port *sess;
1940         uint32_t tag = abts->exchange_addr_to_abort;
1941         uint8_t s_id[3];
1942         int rc;
1943         unsigned long flags;
1944
1945         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1946                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1947                     "qla_target(%d): ABTS: Abort Sequence not "
1948                     "supported\n", vha->vp_idx);
1949                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1950                     false);
1951                 return;
1952         }
1953
1954         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1955                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1956                     "qla_target(%d): ABTS: Unknown Exchange "
1957                     "Address received\n", vha->vp_idx);
1958                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1959                     false);
1960                 return;
1961         }
1962
1963         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1964             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1965             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1966             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1967             le32_to_cpu(abts->fcp_hdr_le.parameter));
1968
1969         s_id[0] = abts->fcp_hdr_le.s_id[2];
1970         s_id[1] = abts->fcp_hdr_le.s_id[1];
1971         s_id[2] = abts->fcp_hdr_le.s_id[0];
1972
1973         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1974         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1975         if (!sess) {
1976                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1977                     "qla_target(%d): task abort for non-existant session\n",
1978                     vha->vp_idx);
1979                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1980                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1981
1982                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1983
1984                 if (rc != 0) {
1985                         qlt_24xx_send_abts_resp(ha->base_qpair, abts,
1986                             FCP_TMF_REJECTED, false);
1987                 }
1988                 return;
1989         }
1990         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1991
1992
1993         if (sess->deleted) {
1994                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1995                     false);
1996                 return;
1997         }
1998
1999         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2000         if (rc != 0) {
2001                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2002                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2003                     vha->vp_idx, rc);
2004                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2005                     false);
2006                 return;
2007         }
2008 }
2009
2010 /*
2011  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2012  */
2013 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2014         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2015 {
2016         struct scsi_qla_host *ha = mcmd->vha;
2017         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2018         struct ctio7_to_24xx *ctio;
2019         uint16_t temp;
2020
2021         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2022             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2023             ha, atio, resp_code);
2024
2025
2026         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2027         if (ctio == NULL) {
2028                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2029                     "qla_target(%d): %s failed: unable to allocate "
2030                     "request packet\n", ha->vp_idx, __func__);
2031                 return;
2032         }
2033
2034         ctio->entry_type = CTIO_TYPE7;
2035         ctio->entry_count = 1;
2036         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2037         ctio->nport_handle = mcmd->sess->loop_id;
2038         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2039         ctio->vp_index = ha->vp_idx;
2040         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2041         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2042         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2043         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2044         temp = (atio->u.isp24.attr << 9)|
2045                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2046         ctio->u.status1.flags = cpu_to_le16(temp);
2047         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2048         ctio->u.status1.ox_id = cpu_to_le16(temp);
2049         ctio->u.status1.scsi_status =
2050             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2051         ctio->u.status1.response_len = cpu_to_le16(8);
2052         ctio->u.status1.sense_data[0] = resp_code;
2053
2054         /* Memory Barrier */
2055         wmb();
2056         if (qpair->reqq_start_iocbs)
2057                 qpair->reqq_start_iocbs(qpair);
2058         else
2059                 qla2x00_start_iocbs(ha, qpair->req);
2060 }
2061
2062 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2063 {
2064         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2065 }
2066 EXPORT_SYMBOL(qlt_free_mcmd);
2067
2068 /*
2069  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2070  * reacquire
2071  */
2072 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2073     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2074 {
2075         struct atio_from_isp *atio = &cmd->atio;
2076         struct ctio7_to_24xx *ctio;
2077         uint16_t temp;
2078         struct scsi_qla_host *vha = cmd->vha;
2079
2080         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2081             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2082             "sense_key=%02x, asc=%02x, ascq=%02x",
2083             vha, atio, scsi_status, sense_key, asc, ascq);
2084
2085         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2086         if (!ctio) {
2087                 ql_dbg(ql_dbg_async, vha, 0x3067,
2088                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2089                     vha->host_no, __func__);
2090                 goto out;
2091         }
2092
2093         ctio->entry_type = CTIO_TYPE7;
2094         ctio->entry_count = 1;
2095         ctio->handle = QLA_TGT_SKIP_HANDLE;
2096         ctio->nport_handle = cmd->sess->loop_id;
2097         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2098         ctio->vp_index = vha->vp_idx;
2099         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2100         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2101         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2102         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2103         temp = (atio->u.isp24.attr << 9) |
2104             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2105         ctio->u.status1.flags = cpu_to_le16(temp);
2106         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2107         ctio->u.status1.ox_id = cpu_to_le16(temp);
2108         ctio->u.status1.scsi_status =
2109             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2110         ctio->u.status1.response_len = cpu_to_le16(18);
2111         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2112
2113         if (ctio->u.status1.residual != 0)
2114                 ctio->u.status1.scsi_status |=
2115                     cpu_to_le16(SS_RESIDUAL_UNDER);
2116
2117         /* Response code and sense key */
2118         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2119             (&ctio->u.status1.sense_data)[0]);
2120         /* Additional sense length */
2121         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2122         /* ASC and ASCQ */
2123         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2124             (&ctio->u.status1.sense_data)[3]);
2125
2126         /* Memory Barrier */
2127         wmb();
2128
2129         if (qpair->reqq_start_iocbs)
2130                 qpair->reqq_start_iocbs(qpair);
2131         else
2132                 qla2x00_start_iocbs(vha, qpair->req);
2133
2134 out:
2135         return;
2136 }
2137
2138 /* callback from target fabric module code */
2139 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2140 {
2141         struct scsi_qla_host *vha = mcmd->sess->vha;
2142         struct qla_hw_data *ha = vha->hw;
2143         unsigned long flags;
2144         struct qla_qpair *qpair = mcmd->qpair;
2145
2146         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2147             "TM response mcmd (%p) status %#x state %#x",
2148             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2149
2150         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2151
2152         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2153                 /*
2154                  * Either the port is not online or this request was from
2155                  * previous life, just abort the processing.
2156                  */
2157                 ql_dbg(ql_dbg_async, vha, 0xe100,
2158                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2159                         vha->flags.online, qla2x00_reset_active(vha),
2160                         mcmd->reset_count, qpair->chip_reset);
2161                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2162                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2163                 return;
2164         }
2165
2166         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2167                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2168                     ELS_LOGO ||
2169                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2170                     ELS_PRLO ||
2171                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2172                     ELS_TPRLO) {
2173                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2174                             "TM response logo %phC status %#x state %#x",
2175                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2176                             mcmd->flags);
2177                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2178                 } else {
2179                         qlt_send_notify_ack(vha->hw->base_qpair,
2180                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2181                 }
2182         } else {
2183                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2184                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2185                             mcmd->fc_tm_rsp, false);
2186                 else
2187                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2188                             mcmd->fc_tm_rsp);
2189         }
2190         /*
2191          * Make the callback for ->free_mcmd() to queue_work() and invoke
2192          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2193          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2194          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2195          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2196          * qlt_xmit_tm_rsp() returns here..
2197          */
2198         ha->tgt.tgt_ops->free_mcmd(mcmd);
2199         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2200 }
2201 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2202
2203 /* No locks */
2204 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2205 {
2206         struct qla_tgt_cmd *cmd = prm->cmd;
2207
2208         BUG_ON(cmd->sg_cnt == 0);
2209
2210         prm->sg = (struct scatterlist *)cmd->sg;
2211         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2212             cmd->sg_cnt, cmd->dma_data_direction);
2213         if (unlikely(prm->seg_cnt == 0))
2214                 goto out_err;
2215
2216         prm->cmd->sg_mapped = 1;
2217
2218         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2219                 /*
2220                  * If greater than four sg entries then we need to allocate
2221                  * the continuation entries
2222                  */
2223                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2224                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2225                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2226                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2227         } else {
2228                 /* DIF */
2229                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2230                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2231                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2232                         prm->tot_dsds = prm->seg_cnt;
2233                 } else
2234                         prm->tot_dsds = prm->seg_cnt;
2235
2236                 if (cmd->prot_sg_cnt) {
2237                         prm->prot_sg      = cmd->prot_sg;
2238                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2239                                 cmd->prot_sg, cmd->prot_sg_cnt,
2240                                 cmd->dma_data_direction);
2241                         if (unlikely(prm->prot_seg_cnt == 0))
2242                                 goto out_err;
2243
2244                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2245                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2246                                 /* Dif Bundling not support here */
2247                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2248                                                                 cmd->blk_sz);
2249                                 prm->tot_dsds += prm->prot_seg_cnt;
2250                         } else
2251                                 prm->tot_dsds += prm->prot_seg_cnt;
2252                 }
2253         }
2254
2255         return 0;
2256
2257 out_err:
2258         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2259             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2260             0, prm->cmd->sg_cnt);
2261         return -1;
2262 }
2263
2264 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2265 {
2266         struct qla_hw_data *ha;
2267         struct qla_qpair *qpair;
2268         if (!cmd->sg_mapped)
2269                 return;
2270
2271         qpair = cmd->qpair;
2272
2273         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2274             cmd->dma_data_direction);
2275         cmd->sg_mapped = 0;
2276
2277         if (cmd->prot_sg_cnt)
2278                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2279                         cmd->dma_data_direction);
2280
2281         if (!cmd->ctx)
2282                 return;
2283         ha = vha->hw;
2284         if (cmd->ctx_dsd_alloced)
2285                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2286
2287         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2288 }
2289
2290 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2291         uint32_t req_cnt)
2292 {
2293         uint32_t cnt;
2294         struct req_que *req = qpair->req;
2295
2296         if (req->cnt < (req_cnt + 2)) {
2297                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2298                     RD_REG_DWORD_RELAXED(req->req_q_out));
2299
2300                 if  (req->ring_index < cnt)
2301                         req->cnt = cnt - req->ring_index;
2302                 else
2303                         req->cnt = req->length - (req->ring_index - cnt);
2304
2305                 if (unlikely(req->cnt < (req_cnt + 2)))
2306                         return -EAGAIN;
2307         }
2308
2309         req->cnt -= req_cnt;
2310
2311         return 0;
2312 }
2313
2314 /*
2315  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2316  */
2317 static inline void *qlt_get_req_pkt(struct req_que *req)
2318 {
2319         /* Adjust ring index. */
2320         req->ring_index++;
2321         if (req->ring_index == req->length) {
2322                 req->ring_index = 0;
2323                 req->ring_ptr = req->ring;
2324         } else {
2325                 req->ring_ptr++;
2326         }
2327         return (cont_entry_t *)req->ring_ptr;
2328 }
2329
2330 /* ha->hardware_lock supposed to be held on entry */
2331 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2332 {
2333         uint32_t h;
2334         int index;
2335         uint8_t found = 0;
2336         struct req_que *req = qpair->req;
2337
2338         h = req->current_outstanding_cmd;
2339
2340         for (index = 1; index < req->num_outstanding_cmds; index++) {
2341                 h++;
2342                 if (h == req->num_outstanding_cmds)
2343                         h = 1;
2344
2345                 if (h == QLA_TGT_SKIP_HANDLE)
2346                         continue;
2347
2348                 if (!req->outstanding_cmds[h]) {
2349                         found = 1;
2350                         break;
2351                 }
2352         }
2353
2354         if (found) {
2355                 req->current_outstanding_cmd = h;
2356         } else {
2357                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2358                     "qla_target(%d): Ran out of empty cmd slots\n",
2359                     qpair->vha->vp_idx);
2360                 h = QLA_TGT_NULL_HANDLE;
2361         }
2362
2363         return h;
2364 }
2365
2366 /* ha->hardware_lock supposed to be held on entry */
2367 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2368         struct qla_tgt_prm *prm)
2369 {
2370         uint32_t h;
2371         struct ctio7_to_24xx *pkt;
2372         struct atio_from_isp *atio = &prm->cmd->atio;
2373         uint16_t temp;
2374
2375         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2376         prm->pkt = pkt;
2377         memset(pkt, 0, sizeof(*pkt));
2378
2379         pkt->entry_type = CTIO_TYPE7;
2380         pkt->entry_count = (uint8_t)prm->req_cnt;
2381         pkt->vp_index = prm->cmd->vp_idx;
2382
2383         h = qlt_make_handle(qpair);
2384         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2385                 /*
2386                  * CTIO type 7 from the firmware doesn't provide a way to
2387                  * know the initiator's LOOP ID, hence we can't find
2388                  * the session and, so, the command.
2389                  */
2390                 return -EAGAIN;
2391         } else
2392                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2393
2394         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2395         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2396         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2397         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2398         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2399         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2400         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2401         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2402         temp = atio->u.isp24.attr << 9;
2403         pkt->u.status0.flags |= cpu_to_le16(temp);
2404         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2405         pkt->u.status0.ox_id = cpu_to_le16(temp);
2406         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2407
2408         return 0;
2409 }
2410
2411 /*
2412  * ha->hardware_lock supposed to be held on entry. We have already made sure
2413  * that there is sufficient amount of request entries to not drop it.
2414  */
2415 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2416 {
2417         int cnt;
2418         uint32_t *dword_ptr;
2419
2420         /* Build continuation packets */
2421         while (prm->seg_cnt > 0) {
2422                 cont_a64_entry_t *cont_pkt64 =
2423                         (cont_a64_entry_t *)qlt_get_req_pkt(
2424                            prm->cmd->qpair->req);
2425
2426                 /*
2427                  * Make sure that from cont_pkt64 none of
2428                  * 64-bit specific fields used for 32-bit
2429                  * addressing. Cast to (cont_entry_t *) for
2430                  * that.
2431                  */
2432
2433                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2434
2435                 cont_pkt64->entry_count = 1;
2436                 cont_pkt64->sys_define = 0;
2437
2438                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2439                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2440
2441                 /* Load continuation entry data segments */
2442                 for (cnt = 0;
2443                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2444                     cnt++, prm->seg_cnt--) {
2445                         *dword_ptr++ =
2446                             cpu_to_le32(pci_dma_lo32
2447                                 (sg_dma_address(prm->sg)));
2448                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2449                             (sg_dma_address(prm->sg)));
2450                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2451
2452                         prm->sg = sg_next(prm->sg);
2453                 }
2454         }
2455 }
2456
2457 /*
2458  * ha->hardware_lock supposed to be held on entry. We have already made sure
2459  * that there is sufficient amount of request entries to not drop it.
2460  */
2461 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2462 {
2463         int cnt;
2464         uint32_t *dword_ptr;
2465         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2466
2467         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2468
2469         /* Setup packet address segment pointer */
2470         dword_ptr = pkt24->u.status0.dseg_0_address;
2471
2472         /* Set total data segment count */
2473         if (prm->seg_cnt)
2474                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2475
2476         if (prm->seg_cnt == 0) {
2477                 /* No data transfer */
2478                 *dword_ptr++ = 0;
2479                 *dword_ptr = 0;
2480                 return;
2481         }
2482
2483         /* If scatter gather */
2484
2485         /* Load command entry data segments */
2486         for (cnt = 0;
2487             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2488             cnt++, prm->seg_cnt--) {
2489                 *dword_ptr++ =
2490                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2491
2492                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2493                         sg_dma_address(prm->sg)));
2494
2495                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2496
2497                 prm->sg = sg_next(prm->sg);
2498         }
2499
2500         qlt_load_cont_data_segments(prm);
2501 }
2502
2503 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2504 {
2505         return cmd->bufflen > 0;
2506 }
2507
2508 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2509 {
2510         struct qla_tgt_cmd *cmd;
2511         struct scsi_qla_host *vha;
2512
2513         /* asc 0x10=dif error */
2514         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2515                 cmd = prm->cmd;
2516                 vha = cmd->vha;
2517                 /* ASCQ */
2518                 switch (prm->sense_buffer[13]) {
2519                 case 1:
2520                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2521                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2522                             "se_cmd=%p tag[%x]",
2523                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2524                             cmd->atio.u.isp24.exchange_addr);
2525                         break;
2526                 case 2:
2527                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2528                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2529                             "se_cmd=%p tag[%x]",
2530                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2531                             cmd->atio.u.isp24.exchange_addr);
2532                         break;
2533                 case 3:
2534                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2535                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2536                             "se_cmd=%p tag[%x]",
2537                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2538                             cmd->atio.u.isp24.exchange_addr);
2539                         break;
2540                 default:
2541                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2542                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2543                             "se_cmd=%p tag[%x]",
2544                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2545                             cmd->atio.u.isp24.exchange_addr);
2546                         break;
2547                 }
2548                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2549         }
2550 }
2551
2552 /*
2553  * Called without ha->hardware_lock held
2554  */
2555 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2556         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2557         uint32_t *full_req_cnt)
2558 {
2559         struct se_cmd *se_cmd = &cmd->se_cmd;
2560         struct qla_qpair *qpair = cmd->qpair;
2561
2562         prm->cmd = cmd;
2563         prm->tgt = cmd->tgt;
2564         prm->pkt = NULL;
2565         prm->rq_result = scsi_status;
2566         prm->sense_buffer = &cmd->sense_buffer[0];
2567         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2568         prm->sg = NULL;
2569         prm->seg_cnt = -1;
2570         prm->req_cnt = 1;
2571         prm->residual = 0;
2572         prm->add_status_pkt = 0;
2573         prm->prot_sg = NULL;
2574         prm->prot_seg_cnt = 0;
2575         prm->tot_dsds = 0;
2576
2577         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2578                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2579                         return -EAGAIN;
2580         }
2581
2582         *full_req_cnt = prm->req_cnt;
2583
2584         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2585                 prm->residual = se_cmd->residual_count;
2586                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2587                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2588                        prm->residual, se_cmd->tag,
2589                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2590                        cmd->bufflen, prm->rq_result);
2591                 prm->rq_result |= SS_RESIDUAL_UNDER;
2592         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2593                 prm->residual = se_cmd->residual_count;
2594                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2595                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2596                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2597                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2598                 prm->rq_result |= SS_RESIDUAL_OVER;
2599         }
2600
2601         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2602                 /*
2603                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2604                  * ignored in *xmit_response() below
2605                  */
2606                 if (qlt_has_data(cmd)) {
2607                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2608                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2609                             (prm->rq_result != 0))) {
2610                                 prm->add_status_pkt = 1;
2611                                 (*full_req_cnt)++;
2612                         }
2613                 }
2614         }
2615
2616         return 0;
2617 }
2618
2619 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2620     int sending_sense)
2621 {
2622         if (cmd->qpair->enable_class_2)
2623                 return 0;
2624
2625         if (sending_sense)
2626                 return cmd->conf_compl_supported;
2627         else
2628                 return cmd->qpair->enable_explicit_conf &&
2629                     cmd->conf_compl_supported;
2630 }
2631
2632 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2633         struct qla_tgt_prm *prm)
2634 {
2635         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2636             (uint32_t)sizeof(ctio->u.status1.sense_data));
2637         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2638         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2639                 ctio->u.status0.flags |= cpu_to_le16(
2640                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2641                     CTIO7_FLAGS_CONFORM_REQ);
2642         }
2643         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2644         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2645         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2646                 int i;
2647
2648                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2649                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2650                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2651                                     "Skipping EXPLICIT_CONFORM and "
2652                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2653                                     "non GOOD status\n");
2654                                 goto skip_explict_conf;
2655                         }
2656                         ctio->u.status1.flags |= cpu_to_le16(
2657                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2658                             CTIO7_FLAGS_CONFORM_REQ);
2659                 }
2660 skip_explict_conf:
2661                 ctio->u.status1.flags &=
2662                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2663                 ctio->u.status1.flags |=
2664                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2665                 ctio->u.status1.scsi_status |=
2666                     cpu_to_le16(SS_SENSE_LEN_VALID);
2667                 ctio->u.status1.sense_length =
2668                     cpu_to_le16(prm->sense_buffer_len);
2669                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2670                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2671                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2672
2673                 qlt_print_dif_err(prm);
2674
2675         } else {
2676                 ctio->u.status1.flags &=
2677                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2678                 ctio->u.status1.flags |=
2679                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2680                 ctio->u.status1.sense_length = 0;
2681                 memset(ctio->u.status1.sense_data, 0,
2682                     sizeof(ctio->u.status1.sense_data));
2683         }
2684
2685         /* Sense with len > 24, is it possible ??? */
2686 }
2687
2688 static inline int
2689 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2690 {
2691         switch (se_cmd->prot_op) {
2692         case TARGET_PROT_DOUT_INSERT:
2693         case TARGET_PROT_DIN_STRIP:
2694                 if (ql2xenablehba_err_chk >= 1)
2695                         return 1;
2696                 break;
2697         case TARGET_PROT_DOUT_PASS:
2698         case TARGET_PROT_DIN_PASS:
2699                 if (ql2xenablehba_err_chk >= 2)
2700                         return 1;
2701                 break;
2702         case TARGET_PROT_DIN_INSERT:
2703         case TARGET_PROT_DOUT_STRIP:
2704                 return 1;
2705         default:
2706                 break;
2707         }
2708         return 0;
2709 }
2710
2711 static inline int
2712 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2713 {
2714         switch (se_cmd->prot_op) {
2715         case TARGET_PROT_DIN_INSERT:
2716         case TARGET_PROT_DOUT_INSERT:
2717         case TARGET_PROT_DIN_STRIP:
2718         case TARGET_PROT_DOUT_STRIP:
2719         case TARGET_PROT_DIN_PASS:
2720         case TARGET_PROT_DOUT_PASS:
2721             return 1;
2722         default:
2723             return 0;
2724         }
2725         return 0;
2726 }
2727
2728 /*
2729  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2730  */
2731 static void
2732 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2733     uint16_t *pfw_prot_opts)
2734 {
2735         struct se_cmd *se_cmd = &cmd->se_cmd;
2736         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2737         scsi_qla_host_t *vha = cmd->tgt->vha;
2738         struct qla_hw_data *ha = vha->hw;
2739         uint32_t t32 = 0;
2740
2741         /*
2742          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2743          * have been immplemented by TCM, before AppTag is avail.
2744          * Look for modesense_handlers[]
2745          */
2746         ctx->app_tag = 0;
2747         ctx->app_tag_mask[0] = 0x0;
2748         ctx->app_tag_mask[1] = 0x0;
2749
2750         if (IS_PI_UNINIT_CAPABLE(ha)) {
2751                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2752                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2753                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2754                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2755                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2756         }
2757
2758         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2759
2760         switch (se_cmd->prot_type) {
2761         case TARGET_DIF_TYPE0_PROT:
2762                 /*
2763                  * No check for ql2xenablehba_err_chk, as it
2764                  * would be an I/O error if hba tag generation
2765                  * is not done.
2766                  */
2767                 ctx->ref_tag = cpu_to_le32(lba);
2768                 /* enable ALL bytes of the ref tag */
2769                 ctx->ref_tag_mask[0] = 0xff;
2770                 ctx->ref_tag_mask[1] = 0xff;
2771                 ctx->ref_tag_mask[2] = 0xff;
2772                 ctx->ref_tag_mask[3] = 0xff;
2773                 break;
2774         case TARGET_DIF_TYPE1_PROT:
2775             /*
2776              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2777              * REF tag, and 16 bit app tag.
2778              */
2779             ctx->ref_tag = cpu_to_le32(lba);
2780             if (!qla_tgt_ref_mask_check(se_cmd) ||
2781                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2782                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2783                     break;
2784             }
2785             /* enable ALL bytes of the ref tag */
2786             ctx->ref_tag_mask[0] = 0xff;
2787             ctx->ref_tag_mask[1] = 0xff;
2788             ctx->ref_tag_mask[2] = 0xff;
2789             ctx->ref_tag_mask[3] = 0xff;
2790             break;
2791         case TARGET_DIF_TYPE2_PROT:
2792             /*
2793              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2794              * tag has to match LBA in CDB + N
2795              */
2796             ctx->ref_tag = cpu_to_le32(lba);
2797             if (!qla_tgt_ref_mask_check(se_cmd) ||
2798                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2799                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2800                     break;
2801             }
2802             /* enable ALL bytes of the ref tag */
2803             ctx->ref_tag_mask[0] = 0xff;
2804             ctx->ref_tag_mask[1] = 0xff;
2805             ctx->ref_tag_mask[2] = 0xff;
2806             ctx->ref_tag_mask[3] = 0xff;
2807             break;
2808         case TARGET_DIF_TYPE3_PROT:
2809             /* For TYPE 3 protection: 16 bit GUARD only */
2810             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2811             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2812                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2813             break;
2814         }
2815 }
2816
2817 static inline int
2818 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2819 {
2820         uint32_t                *cur_dsd;
2821         uint32_t                transfer_length = 0;
2822         uint32_t                data_bytes;
2823         uint32_t                dif_bytes;
2824         uint8_t                 bundling = 1;
2825         uint8_t                 *clr_ptr;
2826         struct crc_context      *crc_ctx_pkt = NULL;
2827         struct qla_hw_data      *ha;
2828         struct ctio_crc2_to_fw  *pkt;
2829         dma_addr_t              crc_ctx_dma;
2830         uint16_t                fw_prot_opts = 0;
2831         struct qla_tgt_cmd      *cmd = prm->cmd;
2832         struct se_cmd           *se_cmd = &cmd->se_cmd;
2833         uint32_t h;
2834         struct atio_from_isp *atio = &prm->cmd->atio;
2835         struct qla_tc_param     tc;
2836         uint16_t t16;
2837         scsi_qla_host_t *vha = cmd->vha;
2838
2839         ha = vha->hw;
2840
2841         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2842         prm->pkt = pkt;
2843         memset(pkt, 0, sizeof(*pkt));
2844
2845         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2846                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2847                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2848                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2849
2850         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2851             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2852                 bundling = 0;
2853
2854         /* Compute dif len and adjust data len to incude protection */
2855         data_bytes = cmd->bufflen;
2856         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2857
2858         switch (se_cmd->prot_op) {
2859         case TARGET_PROT_DIN_INSERT:
2860         case TARGET_PROT_DOUT_STRIP:
2861                 transfer_length = data_bytes;
2862                 if (cmd->prot_sg_cnt)
2863                         data_bytes += dif_bytes;
2864                 break;
2865         case TARGET_PROT_DIN_STRIP:
2866         case TARGET_PROT_DOUT_INSERT:
2867         case TARGET_PROT_DIN_PASS:
2868         case TARGET_PROT_DOUT_PASS:
2869                 transfer_length = data_bytes + dif_bytes;
2870                 break;
2871         default:
2872                 BUG();
2873                 break;
2874         }
2875
2876         if (!qlt_hba_err_chk_enabled(se_cmd))
2877                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2878         /* HBA error checking enabled */
2879         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2880                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2881                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2882                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2883                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2884                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2885         }
2886
2887         switch (se_cmd->prot_op) {
2888         case TARGET_PROT_DIN_INSERT:
2889         case TARGET_PROT_DOUT_INSERT:
2890                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2891                 break;
2892         case TARGET_PROT_DIN_STRIP:
2893         case TARGET_PROT_DOUT_STRIP:
2894                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2895                 break;
2896         case TARGET_PROT_DIN_PASS:
2897         case TARGET_PROT_DOUT_PASS:
2898                 fw_prot_opts |= PO_MODE_DIF_PASS;
2899                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2900                 break;
2901         default:/* Normal Request */
2902                 fw_prot_opts |= PO_MODE_DIF_PASS;
2903                 break;
2904         }
2905
2906         /* ---- PKT ---- */
2907         /* Update entry type to indicate Command Type CRC_2 IOCB */
2908         pkt->entry_type  = CTIO_CRC2;
2909         pkt->entry_count = 1;
2910         pkt->vp_index = cmd->vp_idx;
2911
2912         h = qlt_make_handle(qpair);
2913         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2914                 /*
2915                  * CTIO type 7 from the firmware doesn't provide a way to
2916                  * know the initiator's LOOP ID, hence we can't find
2917                  * the session and, so, the command.
2918                  */
2919                 return -EAGAIN;
2920         } else
2921                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2922
2923         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
2924         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2925         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2926         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2927         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2928         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2929         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2930         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2931
2932         /* silence compile warning */
2933         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2934         pkt->ox_id  = cpu_to_le16(t16);
2935
2936         t16 = (atio->u.isp24.attr << 9);
2937         pkt->flags |= cpu_to_le16(t16);
2938         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2939
2940         /* Set transfer direction */
2941         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2942                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2943         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2944                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2945
2946         pkt->dseg_count = prm->tot_dsds;
2947         /* Fibre channel byte count */
2948         pkt->transfer_length = cpu_to_le32(transfer_length);
2949
2950         /* ----- CRC context -------- */
2951
2952         /* Allocate CRC context from global pool */
2953         crc_ctx_pkt = cmd->ctx =
2954             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2955
2956         if (!crc_ctx_pkt)
2957                 goto crc_queuing_error;
2958
2959         /* Zero out CTX area. */
2960         clr_ptr = (uint8_t *)crc_ctx_pkt;
2961         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2962
2963         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2964         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2965
2966         /* Set handle */
2967         crc_ctx_pkt->handle = pkt->handle;
2968
2969         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2970
2971         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2972         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2973         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2974
2975         if (!bundling) {
2976                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2977         } else {
2978                 /*
2979                  * Configure Bundling if we need to fetch interlaving
2980                  * protection PCI accesses
2981                  */
2982                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2983                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2984                 crc_ctx_pkt->u.bundling.dseg_count =
2985                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2986                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2987         }
2988
2989         /* Finish the common fields of CRC pkt */
2990         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2991         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2992         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2993         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2994
2995         memset((uint8_t *)&tc, 0 , sizeof(tc));
2996         tc.vha = vha;
2997         tc.blk_sz = cmd->blk_sz;
2998         tc.bufflen = cmd->bufflen;
2999         tc.sg = cmd->sg;
3000         tc.prot_sg = cmd->prot_sg;
3001         tc.ctx = crc_ctx_pkt;
3002         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3003
3004         /* Walks data segments */
3005         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3006
3007         if (!bundling && prm->prot_seg_cnt) {
3008                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3009                         prm->tot_dsds, &tc))
3010                         goto crc_queuing_error;
3011         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3012                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3013                 goto crc_queuing_error;
3014
3015         if (bundling && prm->prot_seg_cnt) {
3016                 /* Walks dif segments */
3017                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3018
3019                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3020                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3021                         prm->prot_seg_cnt, &tc))
3022                         goto crc_queuing_error;
3023         }
3024         return QLA_SUCCESS;
3025
3026 crc_queuing_error:
3027         /* Cleanup will be performed by the caller */
3028         qpair->req->outstanding_cmds[h] = NULL;
3029
3030         return QLA_FUNCTION_FAILED;
3031 }
3032
3033 /*
3034  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3035  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3036  */
3037 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3038         uint8_t scsi_status)
3039 {
3040         struct scsi_qla_host *vha = cmd->vha;
3041         struct qla_qpair *qpair = cmd->qpair;
3042         struct ctio7_to_24xx *pkt;
3043         struct qla_tgt_prm prm;
3044         uint32_t full_req_cnt = 0;
3045         unsigned long flags = 0;
3046         int res;
3047
3048         if (cmd->sess && cmd->sess->deleted) {
3049                 cmd->state = QLA_TGT_STATE_PROCESSED;
3050                 if (cmd->sess->logout_completed)
3051                         /* no need to terminate. FW already freed exchange. */
3052                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3053                 else
3054                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3055                 return 0;
3056         }
3057
3058         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3059             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3060             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3061             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3062             &cmd->se_cmd, qpair->id);
3063
3064         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3065             &full_req_cnt);
3066         if (unlikely(res != 0)) {
3067                 return res;
3068         }
3069
3070         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3071
3072         if (xmit_type == QLA_TGT_XMIT_STATUS)
3073                 qpair->tgt_counters.core_qla_snd_status++;
3074         else
3075                 qpair->tgt_counters.core_qla_que_buf++;
3076
3077         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3078                 /*
3079                  * Either the port is not online or this request was from
3080                  * previous life, just abort the processing.
3081                  */
3082                 cmd->state = QLA_TGT_STATE_PROCESSED;
3083                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3084                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3085                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3086                         vha->flags.online, qla2x00_reset_active(vha),
3087                         cmd->reset_count, qpair->chip_reset);
3088                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3089                 return 0;
3090         }
3091
3092         /* Does F/W have an IOCBs for this request */
3093         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3094         if (unlikely(res))
3095                 goto out_unmap_unlock;
3096
3097         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3098                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3099         else
3100                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3101         if (unlikely(res != 0)) {
3102                 qpair->req->cnt += full_req_cnt;
3103                 goto out_unmap_unlock;
3104         }
3105
3106         pkt = (struct ctio7_to_24xx *)prm.pkt;
3107
3108         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3109                 pkt->u.status0.flags |=
3110                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3111                         CTIO7_FLAGS_STATUS_MODE_0);
3112
3113                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3114                         qlt_load_data_segments(&prm);
3115
3116                 if (prm.add_status_pkt == 0) {
3117                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3118                                 pkt->u.status0.scsi_status =
3119                                     cpu_to_le16(prm.rq_result);
3120                                 pkt->u.status0.residual =
3121                                     cpu_to_le32(prm.residual);
3122                                 pkt->u.status0.flags |= cpu_to_le16(
3123                                     CTIO7_FLAGS_SEND_STATUS);
3124                                 if (qlt_need_explicit_conf(cmd, 0)) {
3125                                         pkt->u.status0.flags |=
3126                                             cpu_to_le16(
3127                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3128                                                 CTIO7_FLAGS_CONFORM_REQ);
3129                                 }
3130                         }
3131
3132                 } else {
3133                         /*
3134                          * We have already made sure that there is sufficient
3135                          * amount of request entries to not drop HW lock in
3136                          * req_pkt().
3137                          */
3138                         struct ctio7_to_24xx *ctio =
3139                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3140                                     qpair->req);
3141
3142                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3143                             "Building additional status packet 0x%p.\n",
3144                             ctio);
3145
3146                         /*
3147                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3148                          * ctio7_to_24xx
3149                          */
3150                         memcpy(ctio, pkt, sizeof(*ctio));
3151                         /* reset back to CTIO7 */
3152                         ctio->entry_count = 1;
3153                         ctio->entry_type = CTIO_TYPE7;
3154                         ctio->dseg_count = 0;
3155                         ctio->u.status1.flags &= ~cpu_to_le16(
3156                             CTIO7_FLAGS_DATA_IN);
3157
3158                         /* Real finish is ctio_m1's finish */
3159                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3160                         pkt->u.status0.flags |= cpu_to_le16(
3161                             CTIO7_FLAGS_DONT_RET_CTIO);
3162
3163                         /* qlt_24xx_init_ctio_to_isp will correct
3164                          * all neccessary fields that's part of CTIO7.
3165                          * There should be no residual of CTIO-CRC2 data.
3166                          */
3167                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3168                             &prm);
3169                 }
3170         } else
3171                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3172
3173
3174         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3175         cmd->cmd_sent_to_fw = 1;
3176
3177         /* Memory Barrier */
3178         wmb();
3179         if (qpair->reqq_start_iocbs)
3180                 qpair->reqq_start_iocbs(qpair);
3181         else
3182                 qla2x00_start_iocbs(vha, qpair->req);
3183         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3184
3185         return 0;
3186
3187 out_unmap_unlock:
3188         qlt_unmap_sg(vha, cmd);
3189         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3190
3191         return res;
3192 }
3193 EXPORT_SYMBOL(qlt_xmit_response);
3194
3195 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3196 {
3197         struct ctio7_to_24xx *pkt;
3198         struct scsi_qla_host *vha = cmd->vha;
3199         struct qla_tgt *tgt = cmd->tgt;
3200         struct qla_tgt_prm prm;
3201         unsigned long flags = 0;
3202         int res = 0;
3203         struct qla_qpair *qpair = cmd->qpair;
3204
3205         memset(&prm, 0, sizeof(prm));
3206         prm.cmd = cmd;
3207         prm.tgt = tgt;
3208         prm.sg = NULL;
3209         prm.req_cnt = 1;
3210
3211         /* Calculate number of entries and segments required */
3212         if (qlt_pci_map_calc_cnt(&prm) != 0)
3213                 return -EAGAIN;
3214
3215         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3216             (cmd->sess && cmd->sess->deleted)) {
3217                 /*
3218                  * Either the port is not online or this request was from
3219                  * previous life, just abort the processing.
3220                  */
3221                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3222                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3223                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3224                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3225                         vha->flags.online, qla2x00_reset_active(vha),
3226                         cmd->reset_count, qpair->chip_reset);
3227                 return 0;
3228         }
3229
3230         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3231         /* Does F/W have an IOCBs for this request */
3232         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3233         if (res != 0)
3234                 goto out_unlock_free_unmap;
3235         if (cmd->se_cmd.prot_op)
3236                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3237         else
3238                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3239
3240         if (unlikely(res != 0)) {
3241                 qpair->req->cnt += prm.req_cnt;
3242                 goto out_unlock_free_unmap;
3243         }
3244
3245         pkt = (struct ctio7_to_24xx *)prm.pkt;
3246         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3247             CTIO7_FLAGS_STATUS_MODE_0);
3248
3249         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3250                 qlt_load_data_segments(&prm);
3251
3252         cmd->state = QLA_TGT_STATE_NEED_DATA;
3253         cmd->cmd_sent_to_fw = 1;
3254
3255         /* Memory Barrier */
3256         wmb();
3257         if (qpair->reqq_start_iocbs)
3258                 qpair->reqq_start_iocbs(qpair);
3259         else
3260                 qla2x00_start_iocbs(vha, qpair->req);
3261         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3262
3263         return res;
3264
3265 out_unlock_free_unmap:
3266         qlt_unmap_sg(vha, cmd);
3267         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3268
3269         return res;
3270 }
3271 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3272
3273
3274 /*
3275  * it is assumed either hardware_lock or qpair lock is held.
3276  */
3277 static void
3278 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3279         struct ctio_crc_from_fw *sts)
3280 {
3281         uint8_t         *ap = &sts->actual_dif[0];
3282         uint8_t         *ep = &sts->expected_dif[0];
3283         uint64_t        lba = cmd->se_cmd.t_task_lba;
3284         uint8_t scsi_status, sense_key, asc, ascq;
3285         unsigned long flags;
3286         struct scsi_qla_host *vha = cmd->vha;
3287
3288         cmd->trc_flags |= TRC_DIF_ERR;
3289
3290         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3291         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3292         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3293
3294         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3295         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3296         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3297
3298         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3299             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3300
3301         scsi_status = sense_key = asc = ascq = 0;
3302
3303         /* check appl tag */
3304         if (cmd->e_app_tag != cmd->a_app_tag) {
3305                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3306                     "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]",
3307                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3308                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3309                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3310                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3311
3312                 cmd->dif_err_code = DIF_ERR_APP;
3313                 scsi_status = SAM_STAT_CHECK_CONDITION;
3314                 sense_key = ABORTED_COMMAND;
3315                 asc = 0x10;
3316                 ascq = 0x2;
3317         }
3318
3319         /* check ref tag */
3320         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3321                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3322                     "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] ",
3323                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3324                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3325                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3326                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3327
3328                 cmd->dif_err_code = DIF_ERR_REF;
3329                 scsi_status = SAM_STAT_CHECK_CONDITION;
3330                 sense_key = ABORTED_COMMAND;
3331                 asc = 0x10;
3332                 ascq = 0x3;
3333                 goto out;
3334         }
3335
3336         /* check guard */
3337         if (cmd->e_guard != cmd->a_guard) {
3338                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3339                     "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]",
3340                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3341                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3342                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3343                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3344
3345                 cmd->dif_err_code = DIF_ERR_GRD;
3346                 scsi_status = SAM_STAT_CHECK_CONDITION;
3347                 sense_key = ABORTED_COMMAND;
3348                 asc = 0x10;
3349                 ascq = 0x1;
3350         }
3351 out:
3352         switch (cmd->state) {
3353         case QLA_TGT_STATE_NEED_DATA:
3354                 /* handle_data will load DIF error code  */
3355                 cmd->state = QLA_TGT_STATE_DATA_IN;
3356                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3357                 break;
3358         default:
3359                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3360                 if (cmd->aborted) {
3361                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3362                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3363                         break;
3364                 }
3365                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3366
3367                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3368                     ascq);
3369                 /* assume scsi status gets out on the wire.
3370                  * Will not wait for completion.
3371                  */
3372                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3373                 break;
3374         }
3375 }
3376
3377 /* If hardware_lock held on entry, might drop it, then reaquire */
3378 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3379 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3380         struct imm_ntfy_from_isp *ntfy)
3381 {
3382         struct nack_to_isp *nack;
3383         struct qla_hw_data *ha = vha->hw;
3384         request_t *pkt;
3385         int ret = 0;
3386
3387         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3388             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3389
3390         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3391         if (pkt == NULL) {
3392                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3393                     "qla_target(%d): %s failed: unable to allocate "
3394                     "request packet\n", vha->vp_idx, __func__);
3395                 return -ENOMEM;
3396         }
3397
3398         pkt->entry_type = NOTIFY_ACK_TYPE;
3399         pkt->entry_count = 1;
3400         pkt->handle = QLA_TGT_SKIP_HANDLE;
3401
3402         nack = (struct nack_to_isp *)pkt;
3403         nack->ox_id = ntfy->ox_id;
3404
3405         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3406         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3407                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3408                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3409         }
3410
3411         /* terminate */
3412         nack->u.isp24.flags |=
3413                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3414
3415         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3416         nack->u.isp24.status = ntfy->u.isp24.status;
3417         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3418         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3419         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3420         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3421         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3422         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3423
3424         qla2x00_start_iocbs(vha, vha->req);
3425         return ret;
3426 }
3427
3428 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3429         struct imm_ntfy_from_isp *imm, int ha_locked)
3430 {
3431         unsigned long flags = 0;
3432         int rc;
3433
3434         if (ha_locked) {
3435                 rc = __qlt_send_term_imm_notif(vha, imm);
3436
3437 #if 0   /* Todo  */
3438                 if (rc == -ENOMEM)
3439                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3440 #else
3441                 if (rc) {
3442                 }
3443 #endif
3444                 goto done;
3445         }
3446
3447         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3448         rc = __qlt_send_term_imm_notif(vha, imm);
3449
3450 #if 0   /* Todo */
3451         if (rc == -ENOMEM)
3452                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3453 #endif
3454
3455 done:
3456         if (!ha_locked)
3457                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3458 }
3459
3460 /*
3461  * If hardware_lock held on entry, might drop it, then reaquire
3462  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3463  */
3464 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3465         struct qla_tgt_cmd *cmd,
3466         struct atio_from_isp *atio)
3467 {
3468         struct scsi_qla_host *vha = qpair->vha;
3469         struct ctio7_to_24xx *ctio24;
3470         struct qla_hw_data *ha = vha->hw;
3471         request_t *pkt;
3472         int ret = 0;
3473         uint16_t temp;
3474
3475         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3476
3477         if (cmd)
3478                 vha = cmd->vha;
3479
3480         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3481         if (pkt == NULL) {
3482                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3483                     "qla_target(%d): %s failed: unable to allocate "
3484                     "request packet\n", vha->vp_idx, __func__);
3485                 return -ENOMEM;
3486         }
3487
3488         if (cmd != NULL) {
3489                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3490                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3491                             "qla_target(%d): Terminating cmd %p with "
3492                             "incorrect state %d\n", vha->vp_idx, cmd,
3493                             cmd->state);
3494                 } else
3495                         ret = 1;
3496         }
3497
3498         qpair->tgt_counters.num_term_xchg_sent++;
3499         pkt->entry_count = 1;
3500         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3501
3502         ctio24 = (struct ctio7_to_24xx *)pkt;
3503         ctio24->entry_type = CTIO_TYPE7;
3504         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3505         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3506         ctio24->vp_index = vha->vp_idx;
3507         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3508         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3509         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3510         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3511         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3512                 CTIO7_FLAGS_TERMINATE;
3513         ctio24->u.status1.flags = cpu_to_le16(temp);
3514         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3515         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3516
3517         /* Most likely, it isn't needed */
3518         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3519             &atio->u.isp24.fcp_cmnd.add_cdb[
3520             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3521         if (ctio24->u.status1.residual != 0)
3522                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3523
3524         /* Memory Barrier */
3525         wmb();
3526         if (qpair->reqq_start_iocbs)
3527                 qpair->reqq_start_iocbs(qpair);
3528         else
3529                 qla2x00_start_iocbs(vha, qpair->req);
3530         return ret;
3531 }
3532
3533 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3534         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3535         int ul_abort)
3536 {
3537         struct scsi_qla_host *vha;
3538         unsigned long flags = 0;
3539         int rc;
3540
3541         /* why use different vha? NPIV */
3542         if (cmd)
3543                 vha = cmd->vha;
3544         else
3545                 vha = qpair->vha;
3546
3547         if (ha_locked) {
3548                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3549                 if (rc == -ENOMEM)
3550                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3551                 goto done;
3552         }
3553         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3554         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3555         if (rc == -ENOMEM)
3556                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3557
3558 done:
3559         if (cmd && !ul_abort && !cmd->aborted) {
3560                 if (cmd->sg_mapped)
3561                         qlt_unmap_sg(vha, cmd);
3562                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3563         }
3564
3565         if (!ha_locked)
3566                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3567
3568         return;
3569 }
3570
3571 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3572 {
3573         struct list_head free_list;
3574         struct qla_tgt_cmd *cmd, *tcmd;
3575
3576         vha->hw->tgt.leak_exchg_thresh_hold =
3577             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3578
3579         cmd = tcmd = NULL;
3580         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3581                 INIT_LIST_HEAD(&free_list);
3582                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3583
3584                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3585                         list_del(&cmd->cmd_list);
3586                         /* This cmd was never sent to TCM.  There is no need
3587                          * to schedule free or call free_cmd
3588                          */
3589                         qlt_free_cmd(cmd);
3590                         vha->hw->tgt.num_qfull_cmds_alloc--;
3591                 }
3592         }
3593         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3594 }
3595
3596 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3597 {
3598         uint32_t total_leaked;
3599
3600         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3601
3602         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3603             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3604
3605                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3606                     "Chip reset due to exchange starvation: %d/%d.\n",
3607                     total_leaked, vha->hw->cur_fw_xcb_count);
3608
3609                 if (IS_P3P_TYPE(vha->hw))
3610                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3611                 else
3612                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3613                 qla2xxx_wake_dpc(vha);
3614         }
3615
3616 }
3617
3618 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3619 {
3620         struct qla_tgt *tgt = cmd->tgt;
3621         struct scsi_qla_host *vha = tgt->vha;
3622         struct se_cmd *se_cmd = &cmd->se_cmd;
3623         unsigned long flags;
3624
3625         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3626             "qla_target(%d): terminating exchange for aborted cmd=%p "
3627             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3628             se_cmd->tag);
3629
3630         spin_lock_irqsave(&cmd->cmd_lock, flags);
3631         if (cmd->aborted) {
3632                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3633                 /*
3634                  * It's normal to see 2 calls in this path:
3635                  *  1) XFER Rdy completion + CMD_T_ABORT
3636                  *  2) TCM TMR - drain_state_list
3637                  */
3638                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3639                     "multiple abort. %p transport_state %x, t_state %x, "
3640                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3641                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3642                 return EIO;
3643         }
3644         cmd->aborted = 1;
3645         cmd->trc_flags |= TRC_ABORT;
3646         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3647
3648         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3649         return 0;
3650 }
3651 EXPORT_SYMBOL(qlt_abort_cmd);
3652
3653 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3654 {
3655         struct fc_port *sess = cmd->sess;
3656
3657         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3658             "%s: se_cmd[%p] ox_id %04x\n",
3659             __func__, &cmd->se_cmd,
3660             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3661
3662         BUG_ON(cmd->cmd_in_wq);
3663
3664         if (cmd->sg_mapped)
3665                 qlt_unmap_sg(cmd->vha, cmd);
3666
3667         if (!cmd->q_full)
3668                 qlt_decr_num_pend_cmds(cmd->vha);
3669
3670         BUG_ON(cmd->sg_mapped);
3671         cmd->jiffies_at_free = get_jiffies_64();
3672         if (unlikely(cmd->free_sg))
3673                 kfree(cmd->sg);
3674
3675         if (!sess || !sess->se_sess) {
3676                 WARN_ON(1);
3677                 return;
3678         }
3679         cmd->jiffies_at_free = get_jiffies_64();
3680         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3681 }
3682 EXPORT_SYMBOL(qlt_free_cmd);
3683
3684 /*
3685  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3686  */
3687 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3688         struct qla_tgt_cmd *cmd, uint32_t status)
3689 {
3690         int term = 0;
3691         struct scsi_qla_host *vha = qpair->vha;
3692
3693         if (cmd->se_cmd.prot_op)
3694                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3695                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3696                     "se_cmd=%p tag[%x] op %#x/%s",
3697                      cmd->lba, cmd->lba,
3698                      cmd->num_blks, &cmd->se_cmd,
3699                      cmd->atio.u.isp24.exchange_addr,
3700                      cmd->se_cmd.prot_op,
3701                      prot_op_str(cmd->se_cmd.prot_op));
3702
3703         if (ctio != NULL) {
3704                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3705                 term = !(c->flags &
3706                     cpu_to_le16(OF_TERM_EXCH));
3707         } else
3708                 term = 1;
3709
3710         if (term)
3711                 qlt_term_ctio_exchange(qpair, ctio, cmd, status);
3712
3713         return term;
3714 }
3715
3716
3717 /* ha->hardware_lock supposed to be held on entry */
3718 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3719         struct rsp_que *rsp, uint32_t handle, void *ctio)
3720 {
3721         struct qla_tgt_cmd *cmd = NULL;
3722         struct req_que *req;
3723         int qid = GET_QID(handle);
3724         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3725
3726         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3727                 return NULL;
3728
3729         if (qid == rsp->req->id) {
3730                 req = rsp->req;
3731         } else if (vha->hw->req_q_map[qid]) {
3732                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3733                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3734                     vha->vp_idx, rsp->id, handle);
3735                 req = vha->hw->req_q_map[qid];
3736         } else {
3737                 return NULL;
3738         }
3739
3740         h &= QLA_CMD_HANDLE_MASK;
3741
3742         if (h != QLA_TGT_NULL_HANDLE) {
3743                 if (unlikely(h >= req->num_outstanding_cmds)) {
3744                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3745                             "qla_target(%d): Wrong handle %x received\n",
3746                             vha->vp_idx, handle);
3747                         return NULL;
3748                 }
3749
3750                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3751                 if (unlikely(cmd == NULL)) {
3752                         ql_dbg(ql_dbg_async, vha, 0xe053,
3753                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3754                                 vha->vp_idx, handle, req->id, rsp->id);
3755                         return NULL;
3756                 }
3757                 req->outstanding_cmds[h] = NULL;
3758         } else if (ctio != NULL) {
3759                 /* We can't get loop ID from CTIO7 */
3760                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3761                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3762                     "support NULL handles\n", vha->vp_idx);
3763                 return NULL;
3764         }
3765
3766         return cmd;
3767 }
3768
3769 /* hardware_lock should be held by caller. */
3770 void
3771 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3772 {
3773         struct qla_hw_data *ha = vha->hw;
3774
3775         if (cmd->sg_mapped)
3776                 qlt_unmap_sg(vha, cmd);
3777
3778         /* TODO: fix debug message type and ids. */
3779         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3780                 ql_dbg(ql_dbg_io, vha, 0xff00,
3781                     "HOST-ABORT: state=PROCESSED.\n");
3782         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3783                 cmd->write_data_transferred = 0;
3784                 cmd->state = QLA_TGT_STATE_DATA_IN;
3785
3786                 ql_dbg(ql_dbg_io, vha, 0xff01,
3787                     "HOST-ABORT: state=DATA_IN.\n");
3788
3789                 ha->tgt.tgt_ops->handle_data(cmd);
3790                 return;
3791         } else {
3792                 ql_dbg(ql_dbg_io, vha, 0xff03,
3793                     "HOST-ABORT: state=BAD(%d).\n",
3794                     cmd->state);
3795                 dump_stack();
3796         }
3797
3798         cmd->trc_flags |= TRC_FLUSH;
3799         ha->tgt.tgt_ops->free_cmd(cmd);
3800 }
3801
3802 /*
3803  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3804  */
3805 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3806     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3807 {
3808         struct qla_hw_data *ha = vha->hw;
3809         struct se_cmd *se_cmd;
3810         struct qla_tgt_cmd *cmd;
3811         struct qla_qpair *qpair = rsp->qpair;
3812
3813         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3814                 /* That could happen only in case of an error/reset/abort */
3815                 if (status != CTIO_SUCCESS) {
3816                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3817                             "Intermediate CTIO received"
3818                             " (status %x)\n", status);
3819                 }
3820                 return;
3821         }
3822
3823         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3824         if (cmd == NULL)
3825                 return;
3826
3827         se_cmd = &cmd->se_cmd;
3828         cmd->cmd_sent_to_fw = 0;
3829
3830         qlt_unmap_sg(vha, cmd);
3831
3832         if (unlikely(status != CTIO_SUCCESS)) {
3833                 switch (status & 0xFFFF) {
3834                 case CTIO_LIP_RESET:
3835                 case CTIO_TARGET_RESET:
3836                 case CTIO_ABORTED:
3837                         /* driver request abort via Terminate exchange */
3838                 case CTIO_TIMEOUT:
3839                 case CTIO_INVALID_RX_ID:
3840                         /* They are OK */
3841                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3842                             "qla_target(%d): CTIO with "
3843                             "status %#x received, state %x, se_cmd %p, "
3844                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3845                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3846                             status, cmd->state, se_cmd);
3847                         break;
3848
3849                 case CTIO_PORT_LOGGED_OUT:
3850                 case CTIO_PORT_UNAVAILABLE:
3851                 {
3852                         int logged_out =
3853                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3854
3855                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3856                             "qla_target(%d): CTIO with %s status %x "
3857                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3858                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3859                             status, cmd->state, se_cmd);
3860
3861                         if (logged_out && cmd->sess) {
3862                                 /*
3863                                  * Session is already logged out, but we need
3864                                  * to notify initiator, who's not aware of this
3865                                  */
3866                                 cmd->sess->logout_on_delete = 0;
3867                                 cmd->sess->send_els_logo = 1;
3868                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3869                                     "%s %d %8phC post del sess\n",
3870                                     __func__, __LINE__, cmd->sess->port_name);
3871
3872                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3873                         }
3874                         break;
3875                 }
3876                 case CTIO_DIF_ERROR: {
3877                         struct ctio_crc_from_fw *crc =
3878                                 (struct ctio_crc_from_fw *)ctio;
3879                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3880                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3881                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3882                             "expect_dif[0x%llx]\n",
3883                             vha->vp_idx, status, cmd->state, se_cmd,
3884                             *((u64 *)&crc->actual_dif[0]),
3885                             *((u64 *)&crc->expected_dif[0]));
3886
3887                         qlt_handle_dif_error(qpair, cmd, ctio);
3888                         return;
3889                 }
3890                 default:
3891                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3892                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3893                             vha->vp_idx, status, cmd->state, se_cmd);
3894                         break;
3895                 }
3896
3897
3898                 /* "cmd->aborted" means
3899                  * cmd is already aborted/terminated, we don't
3900                  * need to terminate again.  The exchange is already
3901                  * cleaned up/freed at FW level.  Just cleanup at driver
3902                  * level.
3903                  */
3904                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3905                     (!cmd->aborted)) {
3906                         cmd->trc_flags |= TRC_CTIO_ERR;
3907                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3908                                 return;
3909                 }
3910         }
3911
3912         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3913                 cmd->trc_flags |= TRC_CTIO_DONE;
3914         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3915                 cmd->state = QLA_TGT_STATE_DATA_IN;
3916
3917                 if (status == CTIO_SUCCESS)
3918                         cmd->write_data_transferred = 1;
3919
3920                 ha->tgt.tgt_ops->handle_data(cmd);
3921                 return;
3922         } else if (cmd->aborted) {
3923                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3924                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3925                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3926         } else {
3927                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3929                     "qla_target(%d): A command in state (%d) should "
3930                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3931         }
3932
3933         if (unlikely(status != CTIO_SUCCESS) &&
3934                 !cmd->aborted) {
3935                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3936                 dump_stack();
3937         }
3938
3939         ha->tgt.tgt_ops->free_cmd(cmd);
3940 }
3941
3942 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3943         uint8_t task_codes)
3944 {
3945         int fcp_task_attr;
3946
3947         switch (task_codes) {
3948         case ATIO_SIMPLE_QUEUE:
3949                 fcp_task_attr = TCM_SIMPLE_TAG;
3950                 break;
3951         case ATIO_HEAD_OF_QUEUE:
3952                 fcp_task_attr = TCM_HEAD_TAG;
3953                 break;
3954         case ATIO_ORDERED_QUEUE:
3955                 fcp_task_attr = TCM_ORDERED_TAG;
3956                 break;
3957         case ATIO_ACA_QUEUE:
3958                 fcp_task_attr = TCM_ACA_TAG;
3959                 break;
3960         case ATIO_UNTAGGED:
3961                 fcp_task_attr = TCM_SIMPLE_TAG;
3962                 break;
3963         default:
3964                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3965                     "qla_target: unknown task code %x, use ORDERED instead\n",
3966                     task_codes);
3967                 fcp_task_attr = TCM_ORDERED_TAG;
3968                 break;
3969         }
3970
3971         return fcp_task_attr;
3972 }
3973
3974 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3975                                         uint8_t *);
3976 /*
3977  * Process context for I/O path into tcm_qla2xxx code
3978  */
3979 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3980 {
3981         scsi_qla_host_t *vha = cmd->vha;
3982         struct qla_hw_data *ha = vha->hw;
3983         struct fc_port *sess = cmd->sess;
3984         struct atio_from_isp *atio = &cmd->atio;
3985         unsigned char *cdb;
3986         unsigned long flags;
3987         uint32_t data_length;
3988         int ret, fcp_task_attr, data_dir, bidi = 0;
3989         struct qla_qpair *qpair = cmd->qpair;
3990
3991         cmd->cmd_in_wq = 0;
3992         cmd->trc_flags |= TRC_DO_WORK;
3993
3994         if (cmd->aborted) {
3995                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3996                     "cmd with tag %u is aborted\n",
3997                     cmd->atio.u.isp24.exchange_addr);
3998                 goto out_term;
3999         }
4000
4001         spin_lock_init(&cmd->cmd_lock);
4002         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4003         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4004
4005         if (atio->u.isp24.fcp_cmnd.rddata &&
4006             atio->u.isp24.fcp_cmnd.wrdata) {
4007                 bidi = 1;
4008                 data_dir = DMA_TO_DEVICE;
4009         } else if (atio->u.isp24.fcp_cmnd.rddata)
4010                 data_dir = DMA_FROM_DEVICE;
4011         else if (atio->u.isp24.fcp_cmnd.wrdata)
4012                 data_dir = DMA_TO_DEVICE;
4013         else
4014                 data_dir = DMA_NONE;
4015
4016         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4017             atio->u.isp24.fcp_cmnd.task_attr);
4018         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4019             &atio->u.isp24.fcp_cmnd.add_cdb[
4020             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4021
4022         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4023                                           fcp_task_attr, data_dir, bidi);
4024         if (ret != 0)
4025                 goto out_term;
4026         /*
4027          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4028          */
4029         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4030         ha->tgt.tgt_ops->put_sess(sess);
4031         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4032         return;
4033
4034 out_term:
4035         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4036         /*
4037          * cmd has not sent to target yet, so pass NULL as the second
4038          * argument to qlt_send_term_exchange() and free the memory here.
4039          */
4040         cmd->trc_flags |= TRC_DO_WORK_ERR;
4041         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4042         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4043
4044         qlt_decr_num_pend_cmds(vha);
4045         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4046         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4047
4048         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4049         ha->tgt.tgt_ops->put_sess(sess);
4050         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4051 }
4052
4053 static void qlt_do_work(struct work_struct *work)
4054 {
4055         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4056         scsi_qla_host_t *vha = cmd->vha;
4057         unsigned long flags;
4058
4059         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4060         list_del(&cmd->cmd_list);
4061         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4062
4063         __qlt_do_work(cmd);
4064 }
4065
4066 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4067 {
4068         unsigned long flags;
4069         struct qla_hw_data *ha = vha->hw;
4070         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4071         void *node;
4072         u64 key = 0;
4073
4074         ql_log(ql_log_info, vha, 0x706c,
4075             "User update Number of Active Qpairs %d\n",
4076             ha->tgt.num_act_qpairs);
4077
4078         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4079
4080         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4081                 btree_remove64(&tgt->lun_qpair_map, key);
4082
4083         ha->base_qpair->lun_cnt = 0;
4084         for (key = 0; key < ha->max_qpairs; key++)
4085                 if (ha->queue_pair_map[key])
4086                         ha->queue_pair_map[key]->lun_cnt = 0;
4087
4088         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4089 }
4090
4091 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4092         struct qla_tgt_cmd *cmd)
4093 {
4094         struct qla_qpair *qpair, *qp;
4095         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4096         struct qla_qpair_hint *h;
4097
4098         if (vha->flags.qpairs_available) {
4099                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4100                 if (unlikely(!h)) {
4101                         /* spread lun to qpair ratio evently */
4102                         int lcnt = 0, rc;
4103                         struct scsi_qla_host *base_vha =
4104                                 pci_get_drvdata(vha->hw->pdev);
4105
4106                         qpair = vha->hw->base_qpair;
4107                         if (qpair->lun_cnt == 0) {
4108                                 qpair->lun_cnt++;
4109                                 h = qla_qpair_to_hint(tgt, qpair);
4110                                 BUG_ON(!h);
4111                                 rc = btree_insert64(&tgt->lun_qpair_map,
4112                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4113                                 if (rc) {
4114                                         qpair->lun_cnt--;
4115                                         ql_log(ql_log_info, vha, 0xd037,
4116                                             "Unable to insert lun %llx into lun_qpair_map\n",
4117                                             cmd->unpacked_lun);
4118                                 }
4119                                 goto out;
4120                         } else {
4121                                 lcnt = qpair->lun_cnt;
4122                         }
4123
4124                         h = NULL;
4125                         list_for_each_entry(qp, &base_vha->qp_list,
4126                             qp_list_elem) {
4127                                 if (qp->lun_cnt == 0) {
4128                                         qp->lun_cnt++;
4129                                         h = qla_qpair_to_hint(tgt, qp);
4130                                         BUG_ON(!h);
4131                                         rc = btree_insert64(&tgt->lun_qpair_map,
4132                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4133                                         if (rc) {
4134                                                 qp->lun_cnt--;
4135                                                 ql_log(ql_log_info, vha, 0xd038,
4136                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4137                                                         cmd->unpacked_lun);
4138                                         }
4139                                         qpair = qp;
4140                                         goto out;
4141                                 } else {
4142                                         if (qp->lun_cnt < lcnt) {
4143                                                 lcnt = qp->lun_cnt;
4144                                                 qpair = qp;
4145                                                 continue;
4146                                         }
4147                                 }
4148                         }
4149                         BUG_ON(!qpair);
4150                         qpair->lun_cnt++;
4151                         h = qla_qpair_to_hint(tgt, qpair);
4152                         BUG_ON(!h);
4153                         rc = btree_insert64(&tgt->lun_qpair_map,
4154                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4155                         if (rc) {
4156                                 qpair->lun_cnt--;
4157                                 ql_log(ql_log_info, vha, 0xd039,
4158                                    "Unable to insert lun %llx into lun_qpair_map\n",
4159                                    cmd->unpacked_lun);
4160                         }
4161                 }
4162         } else {
4163                 h = &tgt->qphints[0];
4164         }
4165 out:
4166         cmd->qpair = h->qpair;
4167         cmd->se_cmd.cpuid = h->cpuid;
4168 }
4169
4170 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4171                                        struct fc_port *sess,
4172                                        struct atio_from_isp *atio)
4173 {
4174         struct se_session *se_sess = sess->se_sess;
4175         struct qla_tgt_cmd *cmd;
4176         int tag;
4177
4178         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4179         if (tag < 0)
4180                 return NULL;
4181
4182         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4183         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4184         cmd->cmd_type = TYPE_TGT_CMD;
4185         memcpy(&cmd->atio, atio, sizeof(*atio));
4186         cmd->state = QLA_TGT_STATE_NEW;
4187         cmd->tgt = vha->vha_tgt.qla_tgt;
4188         qlt_incr_num_pend_cmds(vha);
4189         cmd->vha = vha;
4190         cmd->se_cmd.map_tag = tag;
4191         cmd->sess = sess;
4192         cmd->loop_id = sess->loop_id;
4193         cmd->conf_compl_supported = sess->conf_compl_supported;
4194
4195         cmd->trc_flags = 0;
4196         cmd->jiffies_at_alloc = get_jiffies_64();
4197
4198         cmd->unpacked_lun = scsilun_to_int(
4199             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4200         qlt_assign_qpair(vha, cmd);
4201         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4202         cmd->vp_idx = vha->vp_idx;
4203
4204         return cmd;
4205 }
4206
4207 static void qlt_create_sess_from_atio(struct work_struct *work)
4208 {
4209         struct qla_tgt_sess_op *op = container_of(work,
4210                                         struct qla_tgt_sess_op, work);
4211         scsi_qla_host_t *vha = op->vha;
4212         struct qla_hw_data *ha = vha->hw;
4213         struct fc_port *sess;
4214         struct qla_tgt_cmd *cmd;
4215         unsigned long flags;
4216         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4217
4218         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4219         list_del(&op->cmd_list);
4220         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4221
4222         if (op->aborted) {
4223                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4224                     "sess_op with tag %u is aborted\n",
4225                     op->atio.u.isp24.exchange_addr);
4226                 goto out_term;
4227         }
4228
4229         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4230             "qla_target(%d): Unable to find wwn login"
4231             " (s_id %x:%x:%x), trying to create it manually\n",
4232             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4233
4234         if (op->atio.u.raw.entry_count > 1) {
4235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4236                     "Dropping multy entry atio %p\n", &op->atio);
4237                 goto out_term;
4238         }
4239
4240         sess = qlt_make_local_sess(vha, s_id);
4241         /* sess has an extra creation ref. */
4242
4243         if (!sess)
4244                 goto out_term;
4245         /*
4246          * Now obtain a pre-allocated session tag using the original op->atio
4247          * packet header, and dispatch into __qlt_do_work() using the existing
4248          * process context.
4249          */
4250         cmd = qlt_get_tag(vha, sess, &op->atio);
4251         if (!cmd) {
4252                 struct qla_qpair *qpair = ha->base_qpair;
4253
4254                 spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4255                 qlt_send_busy(qpair, &op->atio, SAM_STAT_BUSY);
4256                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4257
4258                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4259                 ha->tgt.tgt_ops->put_sess(sess);
4260                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4261                 kfree(op);
4262                 return;
4263         }
4264
4265         /*
4266          * __qlt_do_work() will call qlt_put_sess() to release
4267          * the extra reference taken above by qlt_make_local_sess()
4268          */
4269         __qlt_do_work(cmd);
4270         kfree(op);
4271         return;
4272 out_term:
4273         qlt_send_term_exchange(vha->hw->base_qpair, NULL, &op->atio, 0, 0);
4274         kfree(op);
4275 }
4276
4277 /* ha->hardware_lock supposed to be held on entry */
4278 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4279         struct atio_from_isp *atio)
4280 {
4281         struct qla_hw_data *ha = vha->hw;
4282         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4283         struct fc_port *sess;
4284         struct qla_tgt_cmd *cmd;
4285         unsigned long flags;
4286
4287         if (unlikely(tgt->tgt_stop)) {
4288                 ql_dbg(ql_dbg_io, vha, 0x3061,
4289                     "New command while device %p is shutting down\n", tgt);
4290                 return -EFAULT;
4291         }
4292
4293         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4294         if (unlikely(!sess)) {
4295                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4296                                                      GFP_ATOMIC);
4297                 if (!op)
4298                         return -ENOMEM;
4299
4300                 memcpy(&op->atio, atio, sizeof(*atio));
4301                 op->vha = vha;
4302
4303                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
4304                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4305                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4306
4307                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4308                 queue_work(qla_tgt_wq, &op->work);
4309                 return 0;
4310         }
4311
4312         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4313          * session deletion, but it's still in sess_del_work wq */
4314         if (sess->deleted) {
4315                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4316                     "New command while old session %p is being deleted\n",
4317                     sess);
4318                 return -EFAULT;
4319         }
4320
4321         /*
4322          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4323          */
4324         if (!kref_get_unless_zero(&sess->sess_kref)) {
4325                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4326                     "%s: kref_get fail, %8phC oxid %x \n",
4327                     __func__, sess->port_name,
4328                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4329                 return -EFAULT;
4330         }
4331
4332         cmd = qlt_get_tag(vha, sess, atio);
4333         if (!cmd) {
4334                 ql_dbg(ql_dbg_io, vha, 0x3062,
4335                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4336                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4337                 ha->tgt.tgt_ops->put_sess(sess);
4338                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4339                 return -ENOMEM;
4340         }
4341
4342         cmd->cmd_in_wq = 1;
4343         cmd->trc_flags |= TRC_NEW_CMD;
4344
4345         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4346         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4347         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4348
4349         INIT_WORK(&cmd->work, qlt_do_work);
4350         if (vha->flags.qpairs_available) {
4351                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4352         } else if (ha->msix_count) {
4353                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4354                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4355                             &cmd->work);
4356                 else
4357                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4358                             &cmd->work);
4359         } else {
4360                 queue_work(qla_tgt_wq, &cmd->work);
4361         }
4362
4363         return 0;
4364 }
4365
4366 /* ha->hardware_lock supposed to be held on entry */
4367 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4368         int fn, void *iocb, int flags)
4369 {
4370         struct scsi_qla_host *vha = sess->vha;
4371         struct qla_hw_data *ha = vha->hw;
4372         struct qla_tgt_mgmt_cmd *mcmd;
4373         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4374         int res;
4375
4376         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4377         if (!mcmd) {
4378                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4379                     "qla_target(%d): Allocation of management "
4380                     "command failed, some commands and their data could "
4381                     "leak\n", vha->vp_idx);
4382                 return -ENOMEM;
4383         }
4384         memset(mcmd, 0, sizeof(*mcmd));
4385         mcmd->sess = sess;
4386
4387         if (iocb) {
4388                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4389                     sizeof(mcmd->orig_iocb.imm_ntfy));
4390         }
4391         mcmd->tmr_func = fn;
4392         mcmd->flags = flags;
4393         mcmd->reset_count = ha->base_qpair->chip_reset;
4394         mcmd->qpair = ha->base_qpair;
4395         mcmd->vha = vha;
4396
4397         switch (fn) {
4398         case QLA_TGT_LUN_RESET:
4399             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4400             break;
4401         }
4402
4403         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4404         if (res != 0) {
4405                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4406                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4407                     sess->vha->vp_idx, res);
4408                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4409                 return -EFAULT;
4410         }
4411
4412         return 0;
4413 }
4414
4415 /* ha->hardware_lock supposed to be held on entry */
4416 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4417 {
4418         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4419         struct qla_hw_data *ha = vha->hw;
4420         struct qla_tgt *tgt;
4421         struct fc_port *sess;
4422         u64 unpacked_lun;
4423         int fn;
4424         unsigned long flags;
4425
4426         tgt = vha->vha_tgt.qla_tgt;
4427
4428         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4429
4430         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4431         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4432             a->u.isp24.fcp_hdr.s_id);
4433         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4434
4435         unpacked_lun =
4436             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4437
4438         if (!sess) {
4439                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4440                     "qla_target(%d): task mgmt fn 0x%x for "
4441                     "non-existant session\n", vha->vp_idx, fn);
4442                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4443                     sizeof(struct atio_from_isp));
4444         }
4445
4446         if (sess->deleted)
4447                 return -EFAULT;
4448
4449         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4450 }
4451
4452 /* ha->hardware_lock supposed to be held on entry */
4453 static int __qlt_abort_task(struct scsi_qla_host *vha,
4454         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4455 {
4456         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4457         struct qla_hw_data *ha = vha->hw;
4458         struct qla_tgt_mgmt_cmd *mcmd;
4459         u64 unpacked_lun;
4460         int rc;
4461
4462         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4463         if (mcmd == NULL) {
4464                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4465                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4466                     vha->vp_idx, __func__);
4467                 return -ENOMEM;
4468         }
4469         memset(mcmd, 0, sizeof(*mcmd));
4470
4471         mcmd->sess = sess;
4472         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4473             sizeof(mcmd->orig_iocb.imm_ntfy));
4474
4475         unpacked_lun =
4476             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4477         mcmd->reset_count = ha->base_qpair->chip_reset;
4478         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4479         mcmd->qpair = ha->base_qpair;
4480
4481         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4482             le16_to_cpu(iocb->u.isp2x.seq_id));
4483         if (rc != 0) {
4484                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4485                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4486                     vha->vp_idx, rc);
4487                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4488                 return -EFAULT;
4489         }
4490
4491         return 0;
4492 }
4493
4494 /* ha->hardware_lock supposed to be held on entry */
4495 static int qlt_abort_task(struct scsi_qla_host *vha,
4496         struct imm_ntfy_from_isp *iocb)
4497 {
4498         struct qla_hw_data *ha = vha->hw;
4499         struct fc_port *sess;
4500         int loop_id;
4501         unsigned long flags;
4502
4503         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4504
4505         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4506         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4507         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4508
4509         if (sess == NULL) {
4510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4511                     "qla_target(%d): task abort for unexisting "
4512                     "session\n", vha->vp_idx);
4513                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4514                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4515         }
4516
4517         return __qlt_abort_task(vha, iocb, sess);
4518 }
4519
4520 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4521 {
4522         if (rc != MBS_COMMAND_COMPLETE) {
4523                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4524                         "%s: se_sess %p / sess %p from"
4525                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4526                         " LOGO failed: %#x\n",
4527                         __func__,
4528                         fcport->se_sess,
4529                         fcport,
4530                         fcport->port_name, fcport->loop_id,
4531                         fcport->d_id.b.domain, fcport->d_id.b.area,
4532                         fcport->d_id.b.al_pa, rc);
4533         }
4534
4535         fcport->logout_completed = 1;
4536 }
4537
4538 /*
4539 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4540 *
4541 * Schedules sessions with matching port_id/loop_id but different wwn for
4542 * deletion. Returns existing session with matching wwn if present.
4543 * Null otherwise.
4544 */
4545 struct fc_port *
4546 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4547     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4548 {
4549         struct fc_port *sess = NULL, *other_sess;
4550         uint64_t other_wwn;
4551
4552         *conflict_sess = NULL;
4553
4554         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4555
4556                 other_wwn = wwn_to_u64(other_sess->port_name);
4557
4558                 if (wwn == other_wwn) {
4559                         WARN_ON(sess);
4560                         sess = other_sess;
4561                         continue;
4562                 }
4563
4564                 /* find other sess with nport_id collision */
4565                 if (port_id.b24 == other_sess->d_id.b24) {
4566                         if (loop_id != other_sess->loop_id) {
4567                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4568                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4569                                     other_sess, other_sess->loop_id, other_wwn);
4570
4571                                 /*
4572                                  * logout_on_delete is set by default, but another
4573                                  * session that has the same s_id/loop_id combo
4574                                  * might have cleared it when requested this session
4575                                  * deletion, so don't touch it
4576                                  */
4577                                 qlt_schedule_sess_for_deletion(other_sess, true);
4578                         } else {
4579                                 /*
4580                                  * Another wwn used to have our s_id/loop_id
4581                                  * kill the session, but don't free the loop_id
4582                                  */
4583                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4584                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4585                                     other_sess, other_sess->loop_id, other_wwn);
4586
4587
4588                                 other_sess->keep_nport_handle = 1;
4589                                 *conflict_sess = other_sess;
4590                                 qlt_schedule_sess_for_deletion(other_sess,
4591                                     true);
4592                         }
4593                         continue;
4594                 }
4595
4596                 /* find other sess with nport handle collision */
4597                 if ((loop_id == other_sess->loop_id) &&
4598                         (loop_id != FC_NO_LOOP_ID)) {
4599                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4600                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4601                                other_sess, other_sess->loop_id, other_wwn);
4602
4603                         /* Same loop_id but different s_id
4604                          * Ok to kill and logout */
4605                         qlt_schedule_sess_for_deletion(other_sess, true);
4606                 }
4607         }
4608
4609         return sess;
4610 }
4611
4612 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4613 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4614 {
4615         struct qla_tgt_sess_op *op;
4616         struct qla_tgt_cmd *cmd;
4617         uint32_t key;
4618         int count = 0;
4619         unsigned long flags;
4620
4621         key = (((u32)s_id->b.domain << 16) |
4622                ((u32)s_id->b.area   <<  8) |
4623                ((u32)s_id->b.al_pa));
4624
4625         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4626         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4627                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4628
4629                 if (op_key == key) {
4630                         op->aborted = true;
4631                         count++;
4632                 }
4633         }
4634
4635         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4636                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4637                 if (op_key == key) {
4638                         op->aborted = true;
4639                         count++;
4640                 }
4641         }
4642
4643         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4644                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4645                 if (cmd_key == key) {
4646                         cmd->aborted = 1;
4647                         count++;
4648                 }
4649         }
4650         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4651
4652         return count;
4653 }
4654
4655 /*
4656  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4657  */
4658 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4659         struct imm_ntfy_from_isp *iocb)
4660 {
4661         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4662         struct qla_hw_data *ha = vha->hw;
4663         struct fc_port *sess = NULL, *conflict_sess = NULL;
4664         uint64_t wwn;
4665         port_id_t port_id;
4666         uint16_t loop_id;
4667         uint16_t wd3_lo;
4668         int res = 0;
4669         struct qlt_plogi_ack_t *pla;
4670         unsigned long flags;
4671
4672         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4673
4674         port_id.b.domain = iocb->u.isp24.port_id[2];
4675         port_id.b.area   = iocb->u.isp24.port_id[1];
4676         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4677         port_id.b.rsvd_1 = 0;
4678
4679         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4680
4681         ql_dbg(ql_dbg_disc, vha, 0xf026,
4682             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4683             vha->vp_idx, iocb->u.isp24.port_id[2],
4684                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4685                    iocb->u.isp24.status_subcode, loop_id,
4686                 iocb->u.isp24.port_name);
4687
4688         /* res = 1 means ack at the end of thread
4689          * res = 0 means ack async/later.
4690          */
4691         switch (iocb->u.isp24.status_subcode) {
4692         case ELS_PLOGI:
4693
4694                 /* Mark all stale commands in qla_tgt_wq for deletion */
4695                 abort_cmds_for_s_id(vha, &port_id);
4696
4697                 if (wwn) {
4698                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4699                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4700                                 port_id, loop_id, &conflict_sess);
4701                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4702                 }
4703
4704                 if (IS_SW_RESV_ADDR(port_id)) {
4705                         res = 1;
4706                         break;
4707                 }
4708
4709                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4710                 if (!pla) {
4711                         qlt_send_term_imm_notif(vha, iocb, 1);
4712                         break;
4713                 }
4714
4715                 res = 0;
4716
4717                 if (conflict_sess) {
4718                         conflict_sess->login_gen++;
4719                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4720                                 QLT_PLOGI_LINK_CONFLICT);
4721                 }
4722
4723                 if (!sess) {
4724                         pla->ref_count++;
4725                         qla24xx_post_newsess_work(vha, &port_id,
4726                                 iocb->u.isp24.port_name, pla);
4727                         res = 0;
4728                         break;
4729                 }
4730
4731                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4732                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4733                 sess->d_id = port_id;
4734                 sess->login_gen++;
4735
4736                 switch (sess->disc_state) {
4737                 case DSC_DELETED:
4738                         qlt_plogi_ack_unref(vha, pla);
4739                         break;
4740
4741                 default:
4742                         /*
4743                          * Under normal circumstances we want to release nport handle
4744                          * during LOGO process to avoid nport handle leaks inside FW.
4745                          * The exception is when LOGO is done while another PLOGI with
4746                          * the same nport handle is waiting as might be the case here.
4747                          * Note: there is always a possibily of a race where session
4748                          * deletion has already started for other reasons (e.g. ACL
4749                          * removal) and now PLOGI arrives:
4750                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4751                          *    FW must have assigned this PLOGI a new/same handle and we
4752                          *    can proceed ACK'ing it as usual when session deletion
4753                          *    completes.
4754                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4755                          *    bit reached it, the handle has now been released. We'll
4756                          *    get an error when we ACK this PLOGI. Nothing will be sent
4757                          *    back to initiator. Initiator should eventually retry
4758                          *    PLOGI and situation will correct itself.
4759                          */
4760                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4761                            (sess->d_id.b24 == port_id.b24));
4762
4763                         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4764                             "%s %d %8phC post del sess\n",
4765                             __func__, __LINE__, sess->port_name);
4766
4767
4768                         qlt_schedule_sess_for_deletion_lock(sess);
4769                         break;
4770                 }
4771
4772                 break;
4773
4774         case ELS_PRLI:
4775                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4776
4777                 if (wwn) {
4778                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4779                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4780                                 loop_id, &conflict_sess);
4781                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4782                 }
4783
4784                 if (conflict_sess) {
4785                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4786                             "PRLI with conflicting sess %p port %8phC\n",
4787                             conflict_sess, conflict_sess->port_name);
4788                         qlt_send_term_imm_notif(vha, iocb, 1);
4789                         res = 0;
4790                         break;
4791                 }
4792
4793                 if (sess != NULL) {
4794                         if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
4795                             sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4796                                 /*
4797                                  * Impatient initiator sent PRLI before last
4798                                  * PLOGI could finish. Will force him to re-try,
4799                                  * while last one finishes.
4800                                  */
4801                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4802                                     "sess %p PRLI received, before plogi ack.\n",
4803                                     sess);
4804                                 qlt_send_term_imm_notif(vha, iocb, 1);
4805                                 res = 0;
4806                                 break;
4807                         }
4808
4809                         /*
4810                          * This shouldn't happen under normal circumstances,
4811                          * since we have deleted the old session during PLOGI
4812                          */
4813                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4814                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4815                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4816
4817                         sess->local = 0;
4818                         sess->loop_id = loop_id;
4819                         sess->d_id = port_id;
4820                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4821
4822                         if (wd3_lo & BIT_7)
4823                                 sess->conf_compl_supported = 1;
4824
4825                         if ((wd3_lo & BIT_4) == 0)
4826                                 sess->port_type = FCT_INITIATOR;
4827                         else
4828                                 sess->port_type = FCT_TARGET;
4829                 }
4830                 res = 1; /* send notify ack */
4831
4832                 /* Make session global (not used in fabric mode) */
4833                 if (ha->current_topology != ISP_CFG_F) {
4834                         if (sess) {
4835                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4836                                     "%s %d %8phC post nack\n",
4837                                     __func__, __LINE__, sess->port_name);
4838                                 qla24xx_post_nack_work(vha, sess, iocb,
4839                                         SRB_NACK_PRLI);
4840                                 res = 0;
4841                         } else {
4842                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4843                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4844                                 qla2xxx_wake_dpc(vha);
4845                         }
4846                 } else {
4847                         if (sess) {
4848                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4849                                     "%s %d %8phC post nack\n",
4850                                     __func__, __LINE__, sess->port_name);
4851                                 qla24xx_post_nack_work(vha, sess, iocb,
4852                                         SRB_NACK_PRLI);
4853                                 res = 0;
4854                         }
4855                 }
4856                 break;
4857
4858         case ELS_TPRLO:
4859                 if (le16_to_cpu(iocb->u.isp24.flags) &
4860                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4861                         loop_id = 0xFFFF;
4862                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4863                         res = 1;
4864                         break;
4865                 }
4866                 /* drop through */
4867         case ELS_LOGO:
4868         case ELS_PRLO:
4869                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4870                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4871                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4872
4873                 if (sess) {
4874                         sess->login_gen++;
4875                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4876                         sess->logo_ack_needed = 1;
4877                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4878                 }
4879
4880                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4881
4882                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
4883                     "%s: logo %llx res %d sess %p ",
4884                     __func__, wwn, res, sess);
4885                 if (res == 0) {
4886                         /*
4887                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4888                          * for LOGO_ACK & sess delete
4889                          */
4890                         BUG_ON(!sess);
4891                         res = 0;
4892                 } else {
4893                         /* cmd did not go to upper layer. */
4894                         if (sess) {
4895                                 qlt_schedule_sess_for_deletion_lock(sess);
4896                                 res = 0;
4897                         }
4898                         /* else logo will be ack */
4899                 }
4900                 break;
4901         case ELS_PDISC:
4902         case ELS_ADISC:
4903         {
4904                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4905                 if (tgt->link_reinit_iocb_pending) {
4906                         qlt_send_notify_ack(ha->base_qpair,
4907                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4908                         tgt->link_reinit_iocb_pending = 0;
4909                 }
4910
4911                 sess = qla2x00_find_fcport_by_wwpn(vha,
4912                     iocb->u.isp24.port_name, 1);
4913                 if (sess) {
4914                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
4915                                 "sess %p lid %d|%d DS %d LS %d\n",
4916                                 sess, sess->loop_id, loop_id,
4917                                 sess->disc_state, sess->fw_login_state);
4918                 }
4919
4920                 res = 1; /* send notify ack */
4921                 break;
4922         }
4923
4924         case ELS_FLOGI: /* should never happen */
4925         default:
4926                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4927                     "qla_target(%d): Unsupported ELS command %x "
4928                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4929                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4930                 break;
4931         }
4932
4933         return res;
4934 }
4935
4936 /*
4937  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4938  */
4939 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4940         struct imm_ntfy_from_isp *iocb)
4941 {
4942         struct qla_hw_data *ha = vha->hw;
4943         uint32_t add_flags = 0;
4944         int send_notify_ack = 1;
4945         uint16_t status;
4946
4947         status = le16_to_cpu(iocb->u.isp2x.status);
4948         switch (status) {
4949         case IMM_NTFY_LIP_RESET:
4950         {
4951                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4952                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4953                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4954                     iocb->u.isp24.status_subcode);
4955
4956                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4957                         send_notify_ack = 0;
4958                 break;
4959         }
4960
4961         case IMM_NTFY_LIP_LINK_REINIT:
4962         {
4963                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4964                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4965                     "qla_target(%d): LINK REINIT (loop %#x, "
4966                     "subcode %x)\n", vha->vp_idx,
4967                     le16_to_cpu(iocb->u.isp24.nport_handle),
4968                     iocb->u.isp24.status_subcode);
4969                 if (tgt->link_reinit_iocb_pending) {
4970                         qlt_send_notify_ack(ha->base_qpair,
4971                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4972                 }
4973                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4974                 tgt->link_reinit_iocb_pending = 1;
4975                 /*
4976                  * QLogic requires to wait after LINK REINIT for possible
4977                  * PDISC or ADISC ELS commands
4978                  */
4979                 send_notify_ack = 0;
4980                 break;
4981         }
4982
4983         case IMM_NTFY_PORT_LOGOUT:
4984                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4985                     "qla_target(%d): Port logout (loop "
4986                     "%#x, subcode %x)\n", vha->vp_idx,
4987                     le16_to_cpu(iocb->u.isp24.nport_handle),
4988                     iocb->u.isp24.status_subcode);
4989
4990                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4991                         send_notify_ack = 0;
4992                 /* The sessions will be cleared in the callback, if needed */
4993                 break;
4994
4995         case IMM_NTFY_GLBL_TPRLO:
4996                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4997                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4998                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4999                         send_notify_ack = 0;
5000                 /* The sessions will be cleared in the callback, if needed */
5001                 break;
5002
5003         case IMM_NTFY_PORT_CONFIG:
5004                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5005                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5006                     status);
5007                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5008                         send_notify_ack = 0;
5009                 /* The sessions will be cleared in the callback, if needed */
5010                 break;
5011
5012         case IMM_NTFY_GLBL_LOGO:
5013                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5014                     "qla_target(%d): Link failure detected\n",
5015                     vha->vp_idx);
5016                 /* I_T nexus loss */
5017                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5018                         send_notify_ack = 0;
5019                 break;
5020
5021         case IMM_NTFY_IOCB_OVERFLOW:
5022                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5023                     "qla_target(%d): Cannot provide requested "
5024                     "capability (IOCB overflowed the immediate notify "
5025                     "resource count)\n", vha->vp_idx);
5026                 break;
5027
5028         case IMM_NTFY_ABORT_TASK:
5029                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5030                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5031                     "L %#x)\n", vha->vp_idx,
5032                     le16_to_cpu(iocb->u.isp2x.seq_id),
5033                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5034                     le16_to_cpu(iocb->u.isp2x.lun));
5035                 if (qlt_abort_task(vha, iocb) == 0)
5036                         send_notify_ack = 0;
5037                 break;
5038
5039         case IMM_NTFY_RESOURCE:
5040                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5041                     "qla_target(%d): Out of resources, host %ld\n",
5042                     vha->vp_idx, vha->host_no);
5043                 break;
5044
5045         case IMM_NTFY_MSG_RX:
5046                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5047                     "qla_target(%d): Immediate notify task %x\n",
5048                     vha->vp_idx, iocb->u.isp2x.task_flags);
5049                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5050                         send_notify_ack = 0;
5051                 break;
5052
5053         case IMM_NTFY_ELS:
5054                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5055                         send_notify_ack = 0;
5056                 break;
5057         default:
5058                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5059                     "qla_target(%d): Received unknown immediate "
5060                     "notify status %x\n", vha->vp_idx, status);
5061                 break;
5062         }
5063
5064         if (send_notify_ack)
5065                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5066                     0, 0);
5067 }
5068
5069 /*
5070  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5071  * This function sends busy to ISP 2xxx or 24xx.
5072  */
5073 static int __qlt_send_busy(struct qla_qpair *qpair,
5074         struct atio_from_isp *atio, uint16_t status)
5075 {
5076         struct scsi_qla_host *vha = qpair->vha;
5077         struct ctio7_to_24xx *ctio24;
5078         struct qla_hw_data *ha = vha->hw;
5079         request_t *pkt;
5080         struct fc_port *sess = NULL;
5081         unsigned long flags;
5082         u16 temp;
5083
5084         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5085         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5086             atio->u.isp24.fcp_hdr.s_id);
5087         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5088         if (!sess) {
5089                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5090                 return 0;
5091         }
5092         /* Sending marker isn't necessary, since we called from ISR */
5093
5094         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5095         if (!pkt) {
5096                 ql_dbg(ql_dbg_io, vha, 0x3063,
5097                     "qla_target(%d): %s failed: unable to allocate "
5098                     "request packet", vha->vp_idx, __func__);
5099                 return -ENOMEM;
5100         }
5101
5102         qpair->tgt_counters.num_q_full_sent++;
5103         pkt->entry_count = 1;
5104         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5105
5106         ctio24 = (struct ctio7_to_24xx *)pkt;
5107         ctio24->entry_type = CTIO_TYPE7;
5108         ctio24->nport_handle = sess->loop_id;
5109         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5110         ctio24->vp_index = vha->vp_idx;
5111         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5112         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5113         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5114         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5115         temp = (atio->u.isp24.attr << 9) |
5116                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5117                 CTIO7_FLAGS_DONT_RET_CTIO;
5118         ctio24->u.status1.flags = cpu_to_le16(temp);
5119         /*
5120          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5121          * if the explicit conformation is used.
5122          */
5123         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5124         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5125         /* Memory Barrier */
5126         wmb();
5127         if (qpair->reqq_start_iocbs)
5128                 qpair->reqq_start_iocbs(qpair);
5129         else
5130                 qla2x00_start_iocbs(vha, qpair->req);
5131         return 0;
5132 }
5133
5134 /*
5135  * This routine is used to allocate a command for either a QFull condition
5136  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5137  * out previously.
5138  */
5139 static void
5140 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5141         struct atio_from_isp *atio, uint16_t status, int qfull)
5142 {
5143         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5144         struct qla_hw_data *ha = vha->hw;
5145         struct fc_port *sess;
5146         struct se_session *se_sess;
5147         struct qla_tgt_cmd *cmd;
5148         int tag;
5149         unsigned long flags;
5150
5151         if (unlikely(tgt->tgt_stop)) {
5152                 ql_dbg(ql_dbg_io, vha, 0x300a,
5153                         "New command while device %p is shutting down\n", tgt);
5154                 return;
5155         }
5156
5157         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5158                 vha->hw->tgt.num_qfull_cmds_dropped++;
5159                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5160                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5161                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5162                                 vha->hw->tgt.num_qfull_cmds_dropped;
5163
5164                 ql_dbg(ql_dbg_io, vha, 0x3068,
5165                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5166                         vha->vp_idx, __func__,
5167                         vha->hw->tgt.num_qfull_cmds_dropped);
5168
5169                 qlt_chk_exch_leak_thresh_hold(vha);
5170                 return;
5171         }
5172
5173         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5174                 (vha, atio->u.isp24.fcp_hdr.s_id);
5175         if (!sess)
5176                 return;
5177
5178         se_sess = sess->se_sess;
5179
5180         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5181         if (tag < 0)
5182                 return;
5183
5184         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5185         if (!cmd) {
5186                 ql_dbg(ql_dbg_io, vha, 0x3009,
5187                         "qla_target(%d): %s: Allocation of cmd failed\n",
5188                         vha->vp_idx, __func__);
5189
5190                 vha->hw->tgt.num_qfull_cmds_dropped++;
5191                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5192                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5193                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5194                                 vha->hw->tgt.num_qfull_cmds_dropped;
5195
5196                 qlt_chk_exch_leak_thresh_hold(vha);
5197                 return;
5198         }
5199
5200         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5201
5202         qlt_incr_num_pend_cmds(vha);
5203         INIT_LIST_HEAD(&cmd->cmd_list);
5204         memcpy(&cmd->atio, atio, sizeof(*atio));
5205
5206         cmd->tgt = vha->vha_tgt.qla_tgt;
5207         cmd->vha = vha;
5208         cmd->reset_count = ha->base_qpair->chip_reset;
5209         cmd->q_full = 1;
5210         cmd->qpair = ha->base_qpair;
5211
5212         if (qfull) {
5213                 cmd->q_full = 1;
5214                 /* NOTE: borrowing the state field to carry the status */
5215                 cmd->state = status;
5216         } else
5217                 cmd->term_exchg = 1;
5218
5219         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5220         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5221
5222         vha->hw->tgt.num_qfull_cmds_alloc++;
5223         if (vha->hw->tgt.num_qfull_cmds_alloc >
5224                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5225                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5226                         vha->hw->tgt.num_qfull_cmds_alloc;
5227         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5228 }
5229
5230 int
5231 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5232 {
5233         struct scsi_qla_host *vha = qpair->vha;
5234         struct qla_hw_data *ha = vha->hw;
5235         unsigned long flags;
5236         struct qla_tgt_cmd *cmd, *tcmd;
5237         struct list_head free_list, q_full_list;
5238         int rc = 0;
5239
5240         if (list_empty(&ha->tgt.q_full_list))
5241                 return 0;
5242
5243         INIT_LIST_HEAD(&free_list);
5244         INIT_LIST_HEAD(&q_full_list);
5245
5246         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5247         if (list_empty(&ha->tgt.q_full_list)) {
5248                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5249                 return 0;
5250         }
5251
5252         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5253         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5254
5255         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5256         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5257                 if (cmd->q_full)
5258                         /* cmd->state is a borrowed field to hold status */
5259                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5260                 else if (cmd->term_exchg)
5261                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5262
5263                 if (rc == -ENOMEM)
5264                         break;
5265
5266                 if (cmd->q_full)
5267                         ql_dbg(ql_dbg_io, vha, 0x3006,
5268                             "%s: busy sent for ox_id[%04x]\n", __func__,
5269                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5270                 else if (cmd->term_exchg)
5271                         ql_dbg(ql_dbg_io, vha, 0x3007,
5272                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5273                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5274                 else
5275                         ql_dbg(ql_dbg_io, vha, 0x3008,
5276                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5277                             cmd);
5278
5279                 list_del(&cmd->cmd_list);
5280                 list_add_tail(&cmd->cmd_list, &free_list);
5281
5282                 /* piggy back on hardware_lock for protection */
5283                 vha->hw->tgt.num_qfull_cmds_alloc--;
5284         }
5285         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5286
5287         cmd = NULL;
5288
5289         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5290                 list_del(&cmd->cmd_list);
5291                 /* This cmd was never sent to TCM.  There is no need
5292                  * to schedule free or call free_cmd
5293                  */
5294                 qlt_free_cmd(cmd);
5295         }
5296
5297         if (!list_empty(&q_full_list)) {
5298                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5299                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5300                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5301         }
5302
5303         return rc;
5304 }
5305
5306 static void
5307 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5308     uint16_t status)
5309 {
5310         int rc = 0;
5311         struct scsi_qla_host *vha = qpair->vha;
5312
5313         rc = __qlt_send_busy(qpair, atio, status);
5314         if (rc == -ENOMEM)
5315                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5316 }
5317
5318 static int
5319 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5320         struct atio_from_isp *atio, uint8_t ha_locked)
5321 {
5322         struct qla_hw_data *ha = vha->hw;
5323         uint16_t status;
5324         unsigned long flags;
5325
5326         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5327                 return 0;
5328
5329         if (!ha_locked)
5330                 spin_lock_irqsave(&ha->hardware_lock, flags);
5331         status = temp_sam_status;
5332         qlt_send_busy(qpair, atio, status);
5333         if (!ha_locked)
5334                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5335
5336         return 1;
5337 }
5338
5339 /* ha->hardware_lock supposed to be held on entry */
5340 /* called via callback from qla2xxx */
5341 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5342         struct atio_from_isp *atio, uint8_t ha_locked)
5343 {
5344         struct qla_hw_data *ha = vha->hw;
5345         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5346         int rc;
5347         unsigned long flags;
5348
5349         if (unlikely(tgt == NULL)) {
5350                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5351                     "ATIO pkt, but no tgt (ha %p)", ha);
5352                 return;
5353         }
5354         /*
5355          * In tgt_stop mode we also should allow all requests to pass.
5356          * Otherwise, some commands can stuck.
5357          */
5358
5359         tgt->atio_irq_cmd_count++;
5360
5361         switch (atio->u.raw.entry_type) {
5362         case ATIO_TYPE7:
5363                 if (unlikely(atio->u.isp24.exchange_addr ==
5364                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5365                         ql_dbg(ql_dbg_io, vha, 0x3065,
5366                             "qla_target(%d): ATIO_TYPE7 "
5367                             "received with UNKNOWN exchange address, "
5368                             "sending QUEUE_FULL\n", vha->vp_idx);
5369                         if (!ha_locked)
5370                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5371                         qlt_send_busy(ha->base_qpair, atio,
5372                             SAM_STAT_TASK_SET_FULL);
5373                         if (!ha_locked)
5374                                 spin_unlock_irqrestore(&ha->hardware_lock,
5375                                     flags);
5376                         break;
5377                 }
5378
5379                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5380                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5381                             atio, ha_locked);
5382                         if (rc != 0) {
5383                                 tgt->atio_irq_cmd_count--;
5384                                 return;
5385                         }
5386                         rc = qlt_handle_cmd_for_atio(vha, atio);
5387                 } else {
5388                         rc = qlt_handle_task_mgmt(vha, atio);
5389                 }
5390                 if (unlikely(rc != 0)) {
5391                         if (rc == -ESRCH) {
5392                                 if (!ha_locked)
5393                                         spin_lock_irqsave(&ha->hardware_lock,
5394                                             flags);
5395
5396 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5397                                 qlt_send_busy(ha->base_qpair, atio,
5398                                     SAM_STAT_BUSY);
5399 #else
5400                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5401                                     atio, 1, 0);
5402 #endif
5403                                 if (!ha_locked)
5404                                         spin_unlock_irqrestore(
5405                                             &ha->hardware_lock, flags);
5406                         } else {
5407                                 if (tgt->tgt_stop) {
5408                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5409                                             "qla_target: Unable to send "
5410                                             "command to target for req, "
5411                                             "ignoring.\n");
5412                                 } else {
5413                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5414                                             "qla_target(%d): Unable to send "
5415                                             "command to target, sending BUSY "
5416                                             "status.\n", vha->vp_idx);
5417                                         if (!ha_locked)
5418                                                 spin_lock_irqsave(
5419                                                     &ha->hardware_lock, flags);
5420                                         qlt_send_busy(ha->base_qpair,
5421                                             atio, SAM_STAT_BUSY);
5422                                         if (!ha_locked)
5423                                                 spin_unlock_irqrestore(
5424                                                     &ha->hardware_lock, flags);
5425                                 }
5426                         }
5427                 }
5428                 break;
5429
5430         case IMMED_NOTIFY_TYPE:
5431         {
5432                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5433                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5434                             "qla_target(%d): Received ATIO packet %x "
5435                             "with error status %x\n", vha->vp_idx,
5436                             atio->u.raw.entry_type,
5437                             atio->u.isp2x.entry_status);
5438                         break;
5439                 }
5440                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5441
5442                 if (!ha_locked)
5443                         spin_lock_irqsave(&ha->hardware_lock, flags);
5444                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5445                 if (!ha_locked)
5446                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5447                 break;
5448         }
5449
5450         default:
5451                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5452                     "qla_target(%d): Received unknown ATIO atio "
5453                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5454                 break;
5455         }
5456
5457         tgt->atio_irq_cmd_count--;
5458 }
5459
5460 /* ha->hardware_lock supposed to be held on entry */
5461 /* called via callback from qla2xxx */
5462 static void qlt_response_pkt(struct scsi_qla_host *vha,
5463         struct rsp_que *rsp, response_t *pkt)
5464 {
5465         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5466
5467         if (unlikely(tgt == NULL)) {
5468                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5469                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5470                     vha->vp_idx, pkt->entry_type, vha->hw);
5471                 return;
5472         }
5473
5474         /*
5475          * In tgt_stop mode we also should allow all requests to pass.
5476          * Otherwise, some commands can stuck.
5477          */
5478
5479         switch (pkt->entry_type) {
5480         case CTIO_CRC2:
5481         case CTIO_TYPE7:
5482         {
5483                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5484                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5485                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5486                     entry);
5487                 break;
5488         }
5489
5490         case ACCEPT_TGT_IO_TYPE:
5491         {
5492                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5493                 int rc;
5494                 if (atio->u.isp2x.status !=
5495                     cpu_to_le16(ATIO_CDB_VALID)) {
5496                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5497                             "qla_target(%d): ATIO with error "
5498                             "status %x received\n", vha->vp_idx,
5499                             le16_to_cpu(atio->u.isp2x.status));
5500                         break;
5501                 }
5502
5503                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5504                 if (rc != 0)
5505                         return;
5506
5507                 rc = qlt_handle_cmd_for_atio(vha, atio);
5508                 if (unlikely(rc != 0)) {
5509                         if (rc == -ESRCH) {
5510 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5511                                 qlt_send_busy(rsp->qpair, atio, 0);
5512 #else
5513                                 qlt_send_term_exchange(rsp->qpair, NULL, atio, 1, 0);
5514 #endif
5515                         } else {
5516                                 if (tgt->tgt_stop) {
5517                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5518                                             "qla_target: Unable to send "
5519                                             "command to target, sending TERM "
5520                                             "EXCHANGE for rsp\n");
5521                                         qlt_send_term_exchange(rsp->qpair, NULL,
5522                                             atio, 1, 0);
5523                                 } else {
5524                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5525                                             "qla_target(%d): Unable to send "
5526                                             "command to target, sending BUSY "
5527                                             "status\n", vha->vp_idx);
5528                                         qlt_send_busy(rsp->qpair, atio, 0);
5529                                 }
5530                         }
5531                 }
5532         }
5533         break;
5534
5535         case CONTINUE_TGT_IO_TYPE:
5536         {
5537                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5538                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5539                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5540                     entry);
5541                 break;
5542         }
5543
5544         case CTIO_A64_TYPE:
5545         {
5546                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5547                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5548                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5549                     entry);
5550                 break;
5551         }
5552
5553         case IMMED_NOTIFY_TYPE:
5554                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5555                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5556                 break;
5557
5558         case NOTIFY_ACK_TYPE:
5559                 if (tgt->notify_ack_expected > 0) {
5560                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5561                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5562                             "NOTIFY_ACK seq %08x status %x\n",
5563                             le16_to_cpu(entry->u.isp2x.seq_id),
5564                             le16_to_cpu(entry->u.isp2x.status));
5565                         tgt->notify_ack_expected--;
5566                         if (entry->u.isp2x.status !=
5567                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5568                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5569                                     "qla_target(%d): NOTIFY_ACK "
5570                                     "failed %x\n", vha->vp_idx,
5571                                     le16_to_cpu(entry->u.isp2x.status));
5572                         }
5573                 } else {
5574                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5575                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5576                             vha->vp_idx);
5577                 }
5578                 break;
5579
5580         case ABTS_RECV_24XX:
5581                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5582                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5583                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5584                 break;
5585
5586         case ABTS_RESP_24XX:
5587                 if (tgt->abts_resp_expected > 0) {
5588                         struct abts_resp_from_24xx_fw *entry =
5589                                 (struct abts_resp_from_24xx_fw *)pkt;
5590                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5591                             "ABTS_RESP_24XX: compl_status %x\n",
5592                             entry->compl_status);
5593                         tgt->abts_resp_expected--;
5594                         if (le16_to_cpu(entry->compl_status) !=
5595                             ABTS_RESP_COMPL_SUCCESS) {
5596                                 if ((entry->error_subcode1 == 0x1E) &&
5597                                     (entry->error_subcode2 == 0)) {
5598                                         /*
5599                                          * We've got a race here: aborted
5600                                          * exchange not terminated, i.e.
5601                                          * response for the aborted command was
5602                                          * sent between the abort request was
5603                                          * received and processed.
5604                                          * Unfortunately, the firmware has a
5605                                          * silly requirement that all aborted
5606                                          * exchanges must be explicitely
5607                                          * terminated, otherwise it refuses to
5608                                          * send responses for the abort
5609                                          * requests. So, we have to
5610                                          * (re)terminate the exchange and retry
5611                                          * the abort response.
5612                                          */
5613                                         qlt_24xx_retry_term_exchange(vha,
5614                                             entry);
5615                                 } else
5616                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5617                                             "qla_target(%d): ABTS_RESP_24XX "
5618                                             "failed %x (subcode %x:%x)",
5619                                             vha->vp_idx, entry->compl_status,
5620                                             entry->error_subcode1,
5621                                             entry->error_subcode2);
5622                         }
5623                 } else {
5624                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5625                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5626                             "received\n", vha->vp_idx);
5627                 }
5628                 break;
5629
5630         default:
5631                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5632                     "qla_target(%d): Received unknown response pkt "
5633                     "type %x\n", vha->vp_idx, pkt->entry_type);
5634                 break;
5635         }
5636
5637 }
5638
5639 /*
5640  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5641  */
5642 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5643         uint16_t *mailbox)
5644 {
5645         struct qla_hw_data *ha = vha->hw;
5646         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5647         int login_code;
5648
5649         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5650                 return;
5651
5652         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5653             IS_QLA2100(ha))
5654                 return;
5655         /*
5656          * In tgt_stop mode we also should allow all requests to pass.
5657          * Otherwise, some commands can stuck.
5658          */
5659
5660
5661         switch (code) {
5662         case MBA_RESET:                 /* Reset */
5663         case MBA_SYSTEM_ERR:            /* System Error */
5664         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5665         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5666                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5667                     "qla_target(%d): System error async event %#x "
5668                     "occurred", vha->vp_idx, code);
5669                 break;
5670         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5671                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5672                 break;
5673
5674         case MBA_LOOP_UP:
5675         {
5676                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5677                     "qla_target(%d): Async LOOP_UP occurred "
5678                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5679                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5680                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5681                 if (tgt->link_reinit_iocb_pending) {
5682                         qlt_send_notify_ack(ha->base_qpair,
5683                             (void *)&tgt->link_reinit_iocb,
5684                             0, 0, 0, 0, 0, 0);
5685                         tgt->link_reinit_iocb_pending = 0;
5686                 }
5687                 break;
5688         }
5689
5690         case MBA_LIP_OCCURRED:
5691         case MBA_LOOP_DOWN:
5692         case MBA_LIP_RESET:
5693         case MBA_RSCN_UPDATE:
5694                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5695                     "qla_target(%d): Async event %#x occurred "
5696                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5697                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5698                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5699                 break;
5700
5701         case MBA_REJECTED_FCP_CMD:
5702                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5703                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5704                     vha->vp_idx,
5705                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5706                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5707
5708                 if (le16_to_cpu(mailbox[3]) == 1) {
5709                         /* exchange starvation. */
5710                         vha->hw->exch_starvation++;
5711                         if (vha->hw->exch_starvation > 5) {
5712                                 ql_log(ql_log_warn, vha, 0xd03a,
5713                                     "Exchange starvation-. Resetting RISC\n");
5714
5715                                 vha->hw->exch_starvation = 0;
5716                                 if (IS_P3P_TYPE(vha->hw))
5717                                         set_bit(FCOE_CTX_RESET_NEEDED,
5718                                             &vha->dpc_flags);
5719                                 else
5720                                         set_bit(ISP_ABORT_NEEDED,
5721                                             &vha->dpc_flags);
5722                                 qla2xxx_wake_dpc(vha);
5723                         }
5724                 }
5725                 break;
5726
5727         case MBA_PORT_UPDATE:
5728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5729                     "qla_target(%d): Port update async event %#x "
5730                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5731                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5732                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5733                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5734
5735                 login_code = le16_to_cpu(mailbox[2]);
5736                 if (login_code == 0x4) {
5737                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5738                             "Async MB 2: Got PLOGI Complete\n");
5739                         vha->hw->exch_starvation = 0;
5740                 } else if (login_code == 0x7)
5741                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5742                             "Async MB 2: Port Logged Out\n");
5743                 break;
5744         default:
5745                 break;
5746         }
5747
5748 }
5749
5750 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5751         uint16_t loop_id)
5752 {
5753         fc_port_t *fcport, *tfcp, *del;
5754         int rc;
5755         unsigned long flags;
5756         u8 newfcport = 0;
5757
5758         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5759         if (!fcport) {
5760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5761                     "qla_target(%d): Allocation of tmp FC port failed",
5762                     vha->vp_idx);
5763                 return NULL;
5764         }
5765
5766         fcport->loop_id = loop_id;
5767
5768         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5769         if (rc != QLA_SUCCESS) {
5770                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5771                     "qla_target(%d): Failed to retrieve fcport "
5772                     "information -- get_port_database() returned %x "
5773                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5774                 kfree(fcport);
5775                 return NULL;
5776         }
5777
5778         del = NULL;
5779         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5780         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5781
5782         if (tfcp) {
5783                 tfcp->d_id = fcport->d_id;
5784                 tfcp->port_type = fcport->port_type;
5785                 tfcp->supported_classes = fcport->supported_classes;
5786                 tfcp->flags |= fcport->flags;
5787
5788                 del = fcport;
5789                 fcport = tfcp;
5790         } else {
5791                 if (vha->hw->current_topology == ISP_CFG_F)
5792                         fcport->flags |= FCF_FABRIC_DEVICE;
5793
5794                 list_add_tail(&fcport->list, &vha->vp_fcports);
5795                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5796                    vha->fcport_count++;
5797                 fcport->login_gen++;
5798                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5799                 fcport->login_succ = 1;
5800                 newfcport = 1;
5801         }
5802
5803         fcport->deleted = 0;
5804         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5805
5806         switch (vha->host->active_mode) {
5807         case MODE_INITIATOR:
5808         case MODE_DUAL:
5809                 if (newfcport) {
5810                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5811                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5812                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5813                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5814                                 qla24xx_post_upd_fcport_work(vha, fcport);
5815                         } else {
5816                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5817                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5818                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5819                                 qla24xx_post_gpsc_work(vha, fcport);
5820                         }
5821                 }
5822                 break;
5823
5824         case MODE_TARGET:
5825         default:
5826                 break;
5827         }
5828         if (del)
5829                 qla2x00_free_fcport(del);
5830
5831         return fcport;
5832 }
5833
5834 /* Must be called under tgt_mutex */
5835 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5836         uint8_t *s_id)
5837 {
5838         struct fc_port *sess = NULL;
5839         fc_port_t *fcport = NULL;
5840         int rc, global_resets;
5841         uint16_t loop_id = 0;
5842
5843         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5844                 /*
5845                  * This is Domain Controller, so it should be
5846                  * OK to drop SCSI commands from it.
5847                  */
5848                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5849                     "Unable to find initiator with S_ID %x:%x:%x",
5850                     s_id[0], s_id[1], s_id[2]);
5851                 return NULL;
5852         }
5853
5854         mutex_lock(&vha->vha_tgt.tgt_mutex);
5855
5856 retry:
5857         global_resets =
5858             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5859
5860         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5861         if (rc != 0) {
5862                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5863
5864                 ql_log(ql_log_info, vha, 0xf071,
5865                     "qla_target(%d): Unable to find "
5866                     "initiator with S_ID %x:%x:%x",
5867                     vha->vp_idx, s_id[0], s_id[1],
5868                     s_id[2]);
5869
5870                 if (rc == -ENOENT) {
5871                         qlt_port_logo_t logo;
5872                         sid_to_portid(s_id, &logo.id);
5873                         logo.cmd_count = 1;
5874                         qlt_send_first_logo(vha, &logo);
5875                 }
5876
5877                 return NULL;
5878         }
5879
5880         fcport = qlt_get_port_database(vha, loop_id);
5881         if (!fcport) {
5882                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5883                 return NULL;
5884         }
5885
5886         if (global_resets !=
5887             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5888                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5889                     "qla_target(%d): global reset during session discovery "
5890                     "(counter was %d, new %d), retrying", vha->vp_idx,
5891                     global_resets,
5892                     atomic_read(&vha->vha_tgt.
5893                         qla_tgt->tgt_global_resets_count));
5894                 goto retry;
5895         }
5896
5897         sess = qlt_create_sess(vha, fcport, true);
5898
5899         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5900
5901         return sess;
5902 }
5903
5904 static void qlt_abort_work(struct qla_tgt *tgt,
5905         struct qla_tgt_sess_work_param *prm)
5906 {
5907         struct scsi_qla_host *vha = tgt->vha;
5908         struct qla_hw_data *ha = vha->hw;
5909         struct fc_port *sess = NULL;
5910         unsigned long flags = 0, flags2 = 0;
5911         uint32_t be_s_id;
5912         uint8_t s_id[3];
5913         int rc;
5914
5915         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5916
5917         if (tgt->tgt_stop)
5918                 goto out_term2;
5919
5920         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5921         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5922         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5923
5924         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5925             (unsigned char *)&be_s_id);
5926         if (!sess) {
5927                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5928
5929                 sess = qlt_make_local_sess(vha, s_id);
5930                 /* sess has got an extra creation ref */
5931
5932                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5933                 if (!sess)
5934                         goto out_term2;
5935         } else {
5936                 if (sess->deleted) {
5937                         sess = NULL;
5938                         goto out_term2;
5939                 }
5940
5941                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5942                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
5943                             "%s: kref_get fail %8phC \n",
5944                              __func__, sess->port_name);
5945                         sess = NULL;
5946                         goto out_term2;
5947                 }
5948         }
5949
5950         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5951         ha->tgt.tgt_ops->put_sess(sess);
5952         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5953
5954         if (rc != 0)
5955                 goto out_term;
5956         return;
5957
5958 out_term2:
5959         if (sess)
5960                 ha->tgt.tgt_ops->put_sess(sess);
5961         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5962
5963 out_term:
5964         spin_lock_irqsave(&ha->hardware_lock, flags);
5965         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
5966             FCP_TMF_REJECTED, false);
5967         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5968 }
5969
5970 static void qlt_tmr_work(struct qla_tgt *tgt,
5971         struct qla_tgt_sess_work_param *prm)
5972 {
5973         struct atio_from_isp *a = &prm->tm_iocb2;
5974         struct scsi_qla_host *vha = tgt->vha;
5975         struct qla_hw_data *ha = vha->hw;
5976         struct fc_port *sess = NULL;
5977         unsigned long flags;
5978         uint8_t *s_id = NULL; /* to hide compiler warnings */
5979         int rc;
5980         u64 unpacked_lun;
5981         int fn;
5982         void *iocb;
5983
5984         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5985
5986         if (tgt->tgt_stop)
5987                 goto out_term2;
5988
5989         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5990         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5991         if (!sess) {
5992                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5993
5994                 sess = qlt_make_local_sess(vha, s_id);
5995                 /* sess has got an extra creation ref */
5996
5997                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5998                 if (!sess)
5999                         goto out_term2;
6000         } else {
6001                 if (sess->deleted) {
6002                         sess = NULL;
6003                         goto out_term2;
6004                 }
6005
6006                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6007                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6008                             "%s: kref_get fail %8phC\n",
6009                              __func__, sess->port_name);
6010                         sess = NULL;
6011                         goto out_term2;
6012                 }
6013         }
6014
6015         iocb = a;
6016         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6017         unpacked_lun =
6018             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6019
6020         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6021         ha->tgt.tgt_ops->put_sess(sess);
6022         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6023
6024         if (rc != 0)
6025                 goto out_term;
6026         return;
6027
6028 out_term2:
6029         if (sess)
6030                 ha->tgt.tgt_ops->put_sess(sess);
6031         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6032 out_term:
6033         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6034 }
6035
6036 static void qlt_sess_work_fn(struct work_struct *work)
6037 {
6038         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6039         struct scsi_qla_host *vha = tgt->vha;
6040         unsigned long flags;
6041
6042         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6043
6044         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6045         while (!list_empty(&tgt->sess_works_list)) {
6046                 struct qla_tgt_sess_work_param *prm = list_entry(
6047                     tgt->sess_works_list.next, typeof(*prm),
6048                     sess_works_list_entry);
6049
6050                 /*
6051                  * This work can be scheduled on several CPUs at time, so we
6052                  * must delete the entry to eliminate double processing
6053                  */
6054                 list_del(&prm->sess_works_list_entry);
6055
6056                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6057
6058                 switch (prm->type) {
6059                 case QLA_TGT_SESS_WORK_ABORT:
6060                         qlt_abort_work(tgt, prm);
6061                         break;
6062                 case QLA_TGT_SESS_WORK_TM:
6063                         qlt_tmr_work(tgt, prm);
6064                         break;
6065                 default:
6066                         BUG_ON(1);
6067                         break;
6068                 }
6069
6070                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6071
6072                 kfree(prm);
6073         }
6074         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6075 }
6076
6077 /* Must be called under tgt_host_action_mutex */
6078 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6079 {
6080         struct qla_tgt *tgt;
6081         int rc, i;
6082         struct qla_qpair_hint *h;
6083
6084         if (!QLA_TGT_MODE_ENABLED())
6085                 return 0;
6086
6087         if (!IS_TGT_MODE_CAPABLE(ha)) {
6088                 ql_log(ql_log_warn, base_vha, 0xe070,
6089                     "This adapter does not support target mode.\n");
6090                 return 0;
6091         }
6092
6093         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6094             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6095
6096         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6097
6098         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6099         if (!tgt) {
6100                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6101                     "Unable to allocate struct qla_tgt\n");
6102                 return -ENOMEM;
6103         }
6104
6105         tgt->qphints = kzalloc((ha->max_qpairs + 1) *
6106             sizeof(struct qla_qpair_hint), GFP_KERNEL);
6107         if (!tgt->qphints) {
6108                 kfree(tgt);
6109                 ql_log(ql_log_warn, base_vha, 0x0197,
6110                     "Unable to allocate qpair hints.\n");
6111                 return -ENOMEM;
6112         }
6113
6114         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6115                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6116
6117         rc = btree_init64(&tgt->lun_qpair_map);
6118         if (rc) {
6119                 kfree(tgt->qphints);
6120                 kfree(tgt);
6121                 ql_log(ql_log_info, base_vha, 0x0198,
6122                         "Unable to initialize lun_qpair_map btree\n");
6123                 return -EIO;
6124         }
6125         h = &tgt->qphints[0];
6126         h->qpair = ha->base_qpair;
6127         INIT_LIST_HEAD(&h->hint_elem);
6128         h->cpuid = ha->base_qpair->cpuid;
6129         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6130
6131         for (i = 0; i < ha->max_qpairs; i++) {
6132                 unsigned long flags;
6133
6134                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6135                 h = &tgt->qphints[i + 1];
6136                 INIT_LIST_HEAD(&h->hint_elem);
6137                 if (qpair) {
6138                         h->qpair = qpair;
6139                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6140                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6141                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6142                         h->cpuid = qpair->cpuid;
6143                 }
6144         }
6145
6146         tgt->ha = ha;
6147         tgt->vha = base_vha;
6148         init_waitqueue_head(&tgt->waitQ);
6149         INIT_LIST_HEAD(&tgt->del_sess_list);
6150         spin_lock_init(&tgt->sess_work_lock);
6151         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6152         INIT_LIST_HEAD(&tgt->sess_works_list);
6153         atomic_set(&tgt->tgt_global_resets_count, 0);
6154
6155         base_vha->vha_tgt.qla_tgt = tgt;
6156
6157         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6158                 "qla_target(%d): using 64 Bit PCI addressing",
6159                 base_vha->vp_idx);
6160         /* 3 is reserved */
6161         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6162
6163         mutex_lock(&qla_tgt_mutex);
6164         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6165         mutex_unlock(&qla_tgt_mutex);
6166
6167         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6168                 ha->tgt.tgt_ops->add_target(base_vha);
6169
6170         return 0;
6171 }
6172
6173 /* Must be called under tgt_host_action_mutex */
6174 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6175 {
6176         if (!vha->vha_tgt.qla_tgt)
6177                 return 0;
6178
6179         if (vha->fc_vport) {
6180                 qlt_release(vha->vha_tgt.qla_tgt);
6181                 return 0;
6182         }
6183
6184         /* free left over qfull cmds */
6185         qlt_init_term_exchange(vha);
6186
6187         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6188             vha->host_no, ha);
6189         qlt_release(vha->vha_tgt.qla_tgt);
6190
6191         return 0;
6192 }
6193
6194 void qlt_remove_target_resources(struct qla_hw_data *ha)
6195 {
6196         struct scsi_qla_host *node;
6197         u32 key = 0;
6198
6199         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6200                 btree_remove32(&ha->tgt.host_map, key);
6201
6202         btree_destroy32(&ha->tgt.host_map);
6203 }
6204
6205 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6206         unsigned char *b)
6207 {
6208         int i;
6209
6210         pr_debug("qla2xxx HW vha->node_name: ");
6211         for (i = 0; i < WWN_SIZE; i++)
6212                 pr_debug("%02x ", vha->node_name[i]);
6213         pr_debug("\n");
6214         pr_debug("qla2xxx HW vha->port_name: ");
6215         for (i = 0; i < WWN_SIZE; i++)
6216                 pr_debug("%02x ", vha->port_name[i]);
6217         pr_debug("\n");
6218
6219         pr_debug("qla2xxx passed configfs WWPN: ");
6220         put_unaligned_be64(wwpn, b);
6221         for (i = 0; i < WWN_SIZE; i++)
6222                 pr_debug("%02x ", b[i]);
6223         pr_debug("\n");
6224 }
6225
6226 /**
6227  * qla_tgt_lport_register - register lport with external module
6228  *
6229  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6230  * @wwpn: Passwd FC target WWPN
6231  * @callback:  lport initialization callback for tcm_qla2xxx code
6232  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6233  */
6234 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6235                        u64 npiv_wwpn, u64 npiv_wwnn,
6236                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6237 {
6238         struct qla_tgt *tgt;
6239         struct scsi_qla_host *vha;
6240         struct qla_hw_data *ha;
6241         struct Scsi_Host *host;
6242         unsigned long flags;
6243         int rc;
6244         u8 b[WWN_SIZE];
6245
6246         mutex_lock(&qla_tgt_mutex);
6247         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6248                 vha = tgt->vha;
6249                 ha = vha->hw;
6250
6251                 host = vha->host;
6252                 if (!host)
6253                         continue;
6254
6255                 if (!(host->hostt->supported_mode & MODE_TARGET))
6256                         continue;
6257
6258                 spin_lock_irqsave(&ha->hardware_lock, flags);
6259                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6260                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6261                             host->host_no);
6262                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6263                         continue;
6264                 }
6265                 if (tgt->tgt_stop) {
6266                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6267                                  host->host_no);
6268                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6269                         continue;
6270                 }
6271                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6272
6273                 if (!scsi_host_get(host)) {
6274                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6275                             "Unable to scsi_host_get() for"
6276                             " qla2xxx scsi_host\n");
6277                         continue;
6278                 }
6279                 qlt_lport_dump(vha, phys_wwpn, b);
6280
6281                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6282                         scsi_host_put(host);
6283                         continue;
6284                 }
6285                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6286                 if (rc != 0)
6287                         scsi_host_put(host);
6288
6289                 mutex_unlock(&qla_tgt_mutex);
6290                 return rc;
6291         }
6292         mutex_unlock(&qla_tgt_mutex);
6293
6294         return -ENODEV;
6295 }
6296 EXPORT_SYMBOL(qlt_lport_register);
6297
6298 /**
6299  * qla_tgt_lport_deregister - Degister lport
6300  *
6301  * @vha:  Registered scsi_qla_host pointer
6302  */
6303 void qlt_lport_deregister(struct scsi_qla_host *vha)
6304 {
6305         struct qla_hw_data *ha = vha->hw;
6306         struct Scsi_Host *sh = vha->host;
6307         /*
6308          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6309          */
6310         vha->vha_tgt.target_lport_ptr = NULL;
6311         ha->tgt.tgt_ops = NULL;
6312         /*
6313          * Release the Scsi_Host reference for the underlying qla2xxx host
6314          */
6315         scsi_host_put(sh);
6316 }
6317 EXPORT_SYMBOL(qlt_lport_deregister);
6318
6319 /* Must be called under HW lock */
6320 static void qlt_set_mode(struct scsi_qla_host *vha)
6321 {
6322         switch (ql2x_ini_mode) {
6323         case QLA2XXX_INI_MODE_DISABLED:
6324         case QLA2XXX_INI_MODE_EXCLUSIVE:
6325                 vha->host->active_mode = MODE_TARGET;
6326                 break;
6327         case QLA2XXX_INI_MODE_ENABLED:
6328                 vha->host->active_mode = MODE_UNKNOWN;
6329                 break;
6330         case QLA2XXX_INI_MODE_DUAL:
6331                 vha->host->active_mode = MODE_DUAL;
6332                 break;
6333         default:
6334                 break;
6335         }
6336 }
6337
6338 /* Must be called under HW lock */
6339 static void qlt_clear_mode(struct scsi_qla_host *vha)
6340 {
6341         switch (ql2x_ini_mode) {
6342         case QLA2XXX_INI_MODE_DISABLED:
6343                 vha->host->active_mode = MODE_UNKNOWN;
6344                 break;
6345         case QLA2XXX_INI_MODE_EXCLUSIVE:
6346                 vha->host->active_mode = MODE_INITIATOR;
6347                 break;
6348         case QLA2XXX_INI_MODE_ENABLED:
6349         case QLA2XXX_INI_MODE_DUAL:
6350                 vha->host->active_mode = MODE_INITIATOR;
6351                 break;
6352         default:
6353                 break;
6354         }
6355 }
6356
6357 /*
6358  * qla_tgt_enable_vha - NO LOCK HELD
6359  *
6360  * host_reset, bring up w/ Target Mode Enabled
6361  */
6362 void
6363 qlt_enable_vha(struct scsi_qla_host *vha)
6364 {
6365         struct qla_hw_data *ha = vha->hw;
6366         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6367         unsigned long flags;
6368         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6369
6370         if (!tgt) {
6371                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6372                     "Unable to locate qla_tgt pointer from"
6373                     " struct qla_hw_data\n");
6374                 dump_stack();
6375                 return;
6376         }
6377
6378         spin_lock_irqsave(&ha->hardware_lock, flags);
6379         tgt->tgt_stopped = 0;
6380         qlt_set_mode(vha);
6381         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6382
6383         if (vha->vp_idx) {
6384                 qla24xx_disable_vp(vha);
6385                 qla24xx_enable_vp(vha);
6386         } else {
6387                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6388                 qla2xxx_wake_dpc(base_vha);
6389                 qla2x00_wait_for_hba_online(base_vha);
6390         }
6391 }
6392 EXPORT_SYMBOL(qlt_enable_vha);
6393
6394 /*
6395  * qla_tgt_disable_vha - NO LOCK HELD
6396  *
6397  * Disable Target Mode and reset the adapter
6398  */
6399 static void qlt_disable_vha(struct scsi_qla_host *vha)
6400 {
6401         struct qla_hw_data *ha = vha->hw;
6402         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6403         unsigned long flags;
6404
6405         if (!tgt) {
6406                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6407                     "Unable to locate qla_tgt pointer from"
6408                     " struct qla_hw_data\n");
6409                 dump_stack();
6410                 return;
6411         }
6412
6413         spin_lock_irqsave(&ha->hardware_lock, flags);
6414         qlt_clear_mode(vha);
6415         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6416
6417         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6418         qla2xxx_wake_dpc(vha);
6419         qla2x00_wait_for_hba_online(vha);
6420 }
6421
6422 /*
6423  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6424  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6425  * members.
6426  */
6427 void
6428 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6429 {
6430         vha->vha_tgt.qla_tgt = NULL;
6431
6432         mutex_init(&vha->vha_tgt.tgt_mutex);
6433         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6434
6435         qlt_clear_mode(vha);
6436
6437         /*
6438          * NOTE: Currently the value is kept the same for <24xx and
6439          * >=24xx ISPs. If it is necessary to change it,
6440          * the check should be added for specific ISPs,
6441          * assigning the value appropriately.
6442          */
6443         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6444
6445         qlt_add_target(ha, vha);
6446 }
6447
6448 void
6449 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6450 {
6451         /*
6452          * FC-4 Feature bit 0 indicates target functionality to the name server.
6453          */
6454         if (qla_tgt_mode_enabled(vha)) {
6455                 ct_req->req.rff_id.fc4_feature = BIT_0;
6456         } else if (qla_ini_mode_enabled(vha)) {
6457                 ct_req->req.rff_id.fc4_feature = BIT_1;
6458         } else if (qla_dual_mode_enabled(vha))
6459                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6460 }
6461
6462 /*
6463  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6464  * @ha: HA context
6465  *
6466  * Beginning of ATIO ring has initialization control block already built
6467  * by nvram config routine.
6468  *
6469  * Returns 0 on success.
6470  */
6471 void
6472 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6473 {
6474         struct qla_hw_data *ha = vha->hw;
6475         uint16_t cnt;
6476         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6477
6478         if (qla_ini_mode_enabled(vha))
6479                 return;
6480
6481         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6482                 pkt->u.raw.signature = ATIO_PROCESSED;
6483                 pkt++;
6484         }
6485
6486 }
6487
6488 /*
6489  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6490  * @ha: SCSI driver HA context
6491  */
6492 void
6493 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6494 {
6495         struct qla_hw_data *ha = vha->hw;
6496         struct atio_from_isp *pkt;
6497         int cnt, i;
6498
6499         if (!ha->flags.fw_started)
6500                 return;
6501
6502         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6503             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6504                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6505                 cnt = pkt->u.raw.entry_count;
6506
6507                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6508                         /*
6509                          * This packet is corrupted. The header + payload
6510                          * can not be trusted. There is no point in passing
6511                          * it further up.
6512                          */
6513                         ql_log(ql_log_warn, vha, 0xd03c,
6514                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6515                             pkt->u.isp24.fcp_hdr.s_id,
6516                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6517                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6518
6519                         adjust_corrupted_atio(pkt);
6520                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6521                             ha_locked, 0);
6522                 } else {
6523                         qlt_24xx_atio_pkt_all_vps(vha,
6524                             (struct atio_from_isp *)pkt, ha_locked);
6525                 }
6526
6527                 for (i = 0; i < cnt; i++) {
6528                         ha->tgt.atio_ring_index++;
6529                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6530                                 ha->tgt.atio_ring_index = 0;
6531                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6532                         } else
6533                                 ha->tgt.atio_ring_ptr++;
6534
6535                         pkt->u.raw.signature = ATIO_PROCESSED;
6536                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6537                 }
6538                 wmb();
6539         }
6540
6541         /* Adjust ring index */
6542         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6543 }
6544
6545 void
6546 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6547 {
6548         struct qla_hw_data *ha = vha->hw;
6549         if (!QLA_TGT_MODE_ENABLED())
6550                 return;
6551
6552         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6553         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6554         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6555
6556         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6557                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6558                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6559
6560                 icb->msix_atio = cpu_to_le16(msix->entry);
6561                 ql_dbg(ql_dbg_init, vha, 0xf072,
6562                     "Registering ICB vector 0x%x for atio que.\n",
6563                     msix->entry);
6564         }
6565 }
6566
6567 void
6568 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6569 {
6570         struct qla_hw_data *ha = vha->hw;
6571
6572         if (!QLA_TGT_MODE_ENABLED())
6573                 return;
6574
6575         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6576                 if (!ha->tgt.saved_set) {
6577                         /* We save only once */
6578                         ha->tgt.saved_exchange_count = nv->exchange_count;
6579                         ha->tgt.saved_firmware_options_1 =
6580                             nv->firmware_options_1;
6581                         ha->tgt.saved_firmware_options_2 =
6582                             nv->firmware_options_2;
6583                         ha->tgt.saved_firmware_options_3 =
6584                             nv->firmware_options_3;
6585                         ha->tgt.saved_set = 1;
6586                 }
6587
6588                 if (qla_tgt_mode_enabled(vha))
6589                         nv->exchange_count = cpu_to_le16(0xFFFF);
6590                 else                    /* dual */
6591                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6592
6593                 /* Enable target mode */
6594                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6595
6596                 /* Disable ini mode, if requested */
6597                 if (qla_tgt_mode_enabled(vha))
6598                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6599
6600                 /* Disable Full Login after LIP */
6601                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6602                 /* Enable initial LIP */
6603                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6604                 if (ql2xtgt_tape_enable)
6605                         /* Enable FC Tape support */
6606                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6607                 else
6608                         /* Disable FC Tape support */
6609                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6610
6611                 /* Disable Full Login after LIP */
6612                 nv->host_p &= cpu_to_le32(~BIT_10);
6613
6614                 /*
6615                  * clear BIT 15 explicitly as we have seen at least
6616                  * a couple of instances where this was set and this
6617                  * was causing the firmware to not be initialized.
6618                  */
6619                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6620                 /* Enable target PRLI control */
6621                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6622         } else {
6623                 if (ha->tgt.saved_set) {
6624                         nv->exchange_count = ha->tgt.saved_exchange_count;
6625                         nv->firmware_options_1 =
6626                             ha->tgt.saved_firmware_options_1;
6627                         nv->firmware_options_2 =
6628                             ha->tgt.saved_firmware_options_2;
6629                         nv->firmware_options_3 =
6630                             ha->tgt.saved_firmware_options_3;
6631                 }
6632                 return;
6633         }
6634
6635         if (ha->base_qpair->enable_class_2) {
6636                 if (vha->flags.init_done)
6637                         fc_host_supported_classes(vha->host) =
6638                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6639
6640                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6641         } else {
6642                 if (vha->flags.init_done)
6643                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6644
6645                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6646         }
6647 }
6648
6649 void
6650 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6651         struct init_cb_24xx *icb)
6652 {
6653         struct qla_hw_data *ha = vha->hw;
6654
6655         if (!QLA_TGT_MODE_ENABLED())
6656                 return;
6657
6658         if (ha->tgt.node_name_set) {
6659                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6660                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6661         }
6662
6663         /* disable ZIO at start time. */
6664         if (!vha->flags.init_done) {
6665                 uint32_t tmp;
6666                 tmp = le32_to_cpu(icb->firmware_options_2);
6667                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6668                 icb->firmware_options_2 = cpu_to_le32(tmp);
6669         }
6670 }
6671
6672 void
6673 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6674 {
6675         struct qla_hw_data *ha = vha->hw;
6676
6677         if (!QLA_TGT_MODE_ENABLED())
6678                 return;
6679
6680         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6681                 if (!ha->tgt.saved_set) {
6682                         /* We save only once */
6683                         ha->tgt.saved_exchange_count = nv->exchange_count;
6684                         ha->tgt.saved_firmware_options_1 =
6685                             nv->firmware_options_1;
6686                         ha->tgt.saved_firmware_options_2 =
6687                             nv->firmware_options_2;
6688                         ha->tgt.saved_firmware_options_3 =
6689                             nv->firmware_options_3;
6690                         ha->tgt.saved_set = 1;
6691                 }
6692
6693                 if (qla_tgt_mode_enabled(vha))
6694                         nv->exchange_count = cpu_to_le16(0xFFFF);
6695                 else                    /* dual */
6696                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6697
6698                 /* Enable target mode */
6699                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6700
6701                 /* Disable ini mode, if requested */
6702                 if (qla_tgt_mode_enabled(vha))
6703                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6704                 /* Disable Full Login after LIP */
6705                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6706                 /* Enable initial LIP */
6707                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6708                 /*
6709                  * clear BIT 15 explicitly as we have seen at
6710                  * least a couple of instances where this was set
6711                  * and this was causing the firmware to not be
6712                  * initialized.
6713                  */
6714                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6715                 if (ql2xtgt_tape_enable)
6716                         /* Enable FC tape support */
6717                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6718                 else
6719                         /* Disable FC tape support */
6720                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6721
6722                 /* Disable Full Login after LIP */
6723                 nv->host_p &= cpu_to_le32(~BIT_10);
6724                 /* Enable target PRLI control */
6725                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6726         } else {
6727                 if (ha->tgt.saved_set) {
6728                         nv->exchange_count = ha->tgt.saved_exchange_count;
6729                         nv->firmware_options_1 =
6730                             ha->tgt.saved_firmware_options_1;
6731                         nv->firmware_options_2 =
6732                             ha->tgt.saved_firmware_options_2;
6733                         nv->firmware_options_3 =
6734                             ha->tgt.saved_firmware_options_3;
6735                 }
6736                 return;
6737         }
6738
6739         if (ha->base_qpair->enable_class_2) {
6740                 if (vha->flags.init_done)
6741                         fc_host_supported_classes(vha->host) =
6742                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6743
6744                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6745         } else {
6746                 if (vha->flags.init_done)
6747                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6748
6749                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6750         }
6751 }
6752
6753 void
6754 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6755         struct init_cb_81xx *icb)
6756 {
6757         struct qla_hw_data *ha = vha->hw;
6758
6759         if (!QLA_TGT_MODE_ENABLED())
6760                 return;
6761
6762         if (ha->tgt.node_name_set) {
6763                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6764                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6765         }
6766
6767         /* disable ZIO at start time. */
6768         if (!vha->flags.init_done) {
6769                 uint32_t tmp;
6770                 tmp = le32_to_cpu(icb->firmware_options_2);
6771                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6772                 icb->firmware_options_2 = cpu_to_le32(tmp);
6773         }
6774
6775 }
6776
6777 void
6778 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6779 {
6780         if (!QLA_TGT_MODE_ENABLED())
6781                 return;
6782
6783         ha->msix_count += 1; /* For ATIO Q */
6784 }
6785
6786
6787 void
6788 qlt_modify_vp_config(struct scsi_qla_host *vha,
6789         struct vp_config_entry_24xx *vpmod)
6790 {
6791         /* enable target mode.  Bit5 = 1 => disable */
6792         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6793                 vpmod->options_idx1 &= ~BIT_5;
6794
6795         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6796         if (qla_tgt_mode_enabled(vha))
6797                 vpmod->options_idx1 &= ~BIT_4;
6798 }
6799
6800 void
6801 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6802 {
6803         int rc;
6804
6805         if (!QLA_TGT_MODE_ENABLED())
6806                 return;
6807
6808         if  (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6809                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6810                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6811         } else {
6812                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6813                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6814         }
6815
6816         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6817         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6818
6819         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6820         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6821             qlt_unknown_atio_work_fn);
6822
6823         qlt_clear_mode(base_vha);
6824
6825         rc = btree_init32(&ha->tgt.host_map);
6826         if (rc)
6827                 ql_log(ql_log_info, base_vha, 0xd03d,
6828                     "Unable to initialize ha->host_map btree\n");
6829
6830         qlt_update_vp_map(base_vha, SET_VP_IDX);
6831 }
6832
6833 irqreturn_t
6834 qla83xx_msix_atio_q(int irq, void *dev_id)
6835 {
6836         struct rsp_que *rsp;
6837         scsi_qla_host_t *vha;
6838         struct qla_hw_data *ha;
6839         unsigned long flags;
6840
6841         rsp = (struct rsp_que *) dev_id;
6842         ha = rsp->hw;
6843         vha = pci_get_drvdata(ha->pdev);
6844
6845         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6846
6847         qlt_24xx_process_atio_queue(vha, 0);
6848
6849         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6850
6851         return IRQ_HANDLED;
6852 }
6853
6854 static void
6855 qlt_handle_abts_recv_work(struct work_struct *work)
6856 {
6857         struct qla_tgt_sess_op *op = container_of(work,
6858                 struct qla_tgt_sess_op, work);
6859         scsi_qla_host_t *vha = op->vha;
6860         struct qla_hw_data *ha = vha->hw;
6861         unsigned long flags;
6862
6863         if (qla2x00_reset_active(vha) ||
6864             (op->chip_reset != ha->base_qpair->chip_reset))
6865                 return;
6866
6867         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6868         qlt_24xx_process_atio_queue(vha, 0);
6869         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6870
6871         spin_lock_irqsave(&ha->hardware_lock, flags);
6872         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6873         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6874
6875         kfree(op);
6876 }
6877
6878 void
6879 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
6880     response_t *pkt)
6881 {
6882         struct qla_tgt_sess_op *op;
6883
6884         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6885
6886         if (!op) {
6887                 /* do not reach for ATIO queue here.  This is best effort err
6888                  * recovery at this point.
6889                  */
6890                 qlt_response_pkt_all_vps(vha, rsp, pkt);
6891                 return;
6892         }
6893
6894         memcpy(&op->atio, pkt, sizeof(*pkt));
6895         op->vha = vha;
6896         op->chip_reset = vha->hw->base_qpair->chip_reset;
6897         op->rsp = rsp;
6898         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6899         queue_work(qla_tgt_wq, &op->work);
6900         return;
6901 }
6902
6903 int
6904 qlt_mem_alloc(struct qla_hw_data *ha)
6905 {
6906         if (!QLA_TGT_MODE_ENABLED())
6907                 return 0;
6908
6909         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6910             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6911         if (!ha->tgt.tgt_vp_map)
6912                 return -ENOMEM;
6913
6914         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6915             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6916             &ha->tgt.atio_dma, GFP_KERNEL);
6917         if (!ha->tgt.atio_ring) {
6918                 kfree(ha->tgt.tgt_vp_map);
6919                 return -ENOMEM;
6920         }
6921         return 0;
6922 }
6923
6924 void
6925 qlt_mem_free(struct qla_hw_data *ha)
6926 {
6927         if (!QLA_TGT_MODE_ENABLED())
6928                 return;
6929
6930         if (ha->tgt.atio_ring) {
6931                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6932                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6933                     ha->tgt.atio_dma);
6934         }
6935         kfree(ha->tgt.tgt_vp_map);
6936 }
6937
6938 /* vport_slock to be held by the caller */
6939 void
6940 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6941 {
6942         void *slot;
6943         u32 key;
6944         int rc;
6945
6946         if (!QLA_TGT_MODE_ENABLED())
6947                 return;
6948
6949         key = vha->d_id.b24;
6950
6951         switch (cmd) {
6952         case SET_VP_IDX:
6953                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6954                 break;
6955         case SET_AL_PA:
6956                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6957                 if (!slot) {
6958                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
6959                             "Save vha in host_map %p %06x\n", vha, key);
6960                         rc = btree_insert32(&vha->hw->tgt.host_map,
6961                                 key, vha, GFP_ATOMIC);
6962                         if (rc)
6963                                 ql_log(ql_log_info, vha, 0xd03e,
6964                                     "Unable to insert s_id into host_map: %06x\n",
6965                                     key);
6966                         return;
6967                 }
6968                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
6969                     "replace existing vha in host_map %p %06x\n", vha, key);
6970                 btree_update32(&vha->hw->tgt.host_map, key, vha);
6971                 break;
6972         case RESET_VP_IDX:
6973                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6974                 break;
6975         case RESET_AL_PA:
6976                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
6977                    "clear vha in host_map %p %06x\n", vha, key);
6978                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6979                 if (slot)
6980                         btree_remove32(&vha->hw->tgt.host_map, key);
6981                 vha->d_id.b24 = 0;
6982                 break;
6983         }
6984 }
6985
6986 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
6987 {
6988         unsigned long flags;
6989         struct qla_hw_data *ha = vha->hw;
6990
6991         if (!vha->d_id.b24) {
6992                 spin_lock_irqsave(&ha->vport_slock, flags);
6993                 vha->d_id = id;
6994                 qlt_update_vp_map(vha, SET_AL_PA);
6995                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6996         } else if (vha->d_id.b24 != id.b24) {
6997                 spin_lock_irqsave(&ha->vport_slock, flags);
6998                 qlt_update_vp_map(vha, RESET_AL_PA);
6999                 vha->d_id = id;
7000                 qlt_update_vp_map(vha, SET_AL_PA);
7001                 spin_unlock_irqrestore(&ha->vport_slock, flags);
7002         }
7003 }
7004
7005 static int __init qlt_parse_ini_mode(void)
7006 {
7007         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7008                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7009         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7010                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7011         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7012                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7013         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7014                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7015         else
7016                 return false;
7017
7018         return true;
7019 }
7020
7021 int __init qlt_init(void)
7022 {
7023         int ret;
7024
7025         if (!qlt_parse_ini_mode()) {
7026                 ql_log(ql_log_fatal, NULL, 0xe06b,
7027                     "qlt_parse_ini_mode() failed\n");
7028                 return -EINVAL;
7029         }
7030
7031         if (!QLA_TGT_MODE_ENABLED())
7032                 return 0;
7033
7034         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7035             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7036             qla_tgt_mgmt_cmd), 0, NULL);
7037         if (!qla_tgt_mgmt_cmd_cachep) {
7038                 ql_log(ql_log_fatal, NULL, 0xd04b,
7039                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7040                 return -ENOMEM;
7041         }
7042
7043         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7044             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7045             0, NULL);
7046
7047         if (!qla_tgt_plogi_cachep) {
7048                 ql_log(ql_log_fatal, NULL, 0xe06d,
7049                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7050                 ret = -ENOMEM;
7051                 goto out_mgmt_cmd_cachep;
7052         }
7053
7054         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7055             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7056         if (!qla_tgt_mgmt_cmd_mempool) {
7057                 ql_log(ql_log_fatal, NULL, 0xe06e,
7058                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7059                 ret = -ENOMEM;
7060                 goto out_plogi_cachep;
7061         }
7062
7063         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7064         if (!qla_tgt_wq) {
7065                 ql_log(ql_log_fatal, NULL, 0xe06f,
7066                     "alloc_workqueue for qla_tgt_wq failed\n");
7067                 ret = -ENOMEM;
7068                 goto out_cmd_mempool;
7069         }
7070         /*
7071          * Return 1 to signal that initiator-mode is being disabled
7072          */
7073         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7074
7075 out_cmd_mempool:
7076         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7077 out_plogi_cachep:
7078         kmem_cache_destroy(qla_tgt_plogi_cachep);
7079 out_mgmt_cmd_cachep:
7080         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7081         return ret;
7082 }
7083
7084 void qlt_exit(void)
7085 {
7086         if (!QLA_TGT_MODE_ENABLED())
7087                 return;
7088
7089         destroy_workqueue(qla_tgt_wq);
7090         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7091         kmem_cache_destroy(qla_tgt_plogi_cachep);
7092         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7093 }