drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30
  31 #include "qla_def.h"
  32 #include "qla_target.h"
  33
  34 static int ql2xtgt_tape_enable;
  35 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  36 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  37                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  38
  39 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  40 module_param(qlini_mode, charp, S_IRUGO);
  41 MODULE_PARM_DESC(qlini_mode,
  42         "Determines when initiator mode will be enabled. Possible values: "
  43         "\"exclusive\" - initiator mode will be enabled on load, "
  44         "disabled on enabling target mode and then on disabling target mode "
  45         "enabled back; "
  46         "\"disabled\" - initiator mode will never be enabled; "
  47         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  48         "when ready "
  49         "\"enabled\" (default) - initiator mode will always stay enabled.");
  50
  51 static int ql_dm_tgt_ex_pct = 0;
  52 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  53 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  54         "For Dual Mode (qlini_mode=dual), this parameter determines "
  55         "the percentage of exchanges/cmds FW will allocate resources "
  56         "for Target mode.");
  57
  58 int ql2xuctrlirq = 1;
  59 module_param(ql2xuctrlirq, int, 0644);
  60 MODULE_PARM_DESC(ql2xuctrlirq,
  61     "User to control IRQ placement via smp_affinity."
  62     "Valid with qlini_mode=disabled."
  63     "1(default): enable");
  64
  65 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  66
  67 static int qla_sam_status = SAM_STAT_BUSY;
  68 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  69
  70 /*
  71  * From scsi/fc/fc_fcp.h
  72  */
  73 enum fcp_resp_rsp_codes {
  74         FCP_TMF_CMPL = 0,
  75         FCP_DATA_LEN_INVALID = 1,
  76         FCP_CMND_FIELDS_INVALID = 2,
  77         FCP_DATA_PARAM_MISMATCH = 3,
  78         FCP_TMF_REJECTED = 4,
  79         FCP_TMF_FAILED = 5,
  80         FCP_TMF_INVALID_LUN = 9,
  81 };
  82
  83 /*
  84  * fc_pri_ta from scsi/fc/fc_fcp.h
  85  */
  86 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  87 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  88 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  89 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  90 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  91 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  92 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  93
  94 /*
  95  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  96  * must be called under HW lock and could unlock/lock it inside.
  97  * It isn't an issue, since in the current implementation on the time when
  98  * those functions are called:
  99  *
 100  *   - Either context is IRQ and only IRQ handler can modify HW data,
 101  *     including rings related fields,
 102  *
 103  *   - Or access to target mode variables from struct qla_tgt doesn't
 104  *     cross those functions boundaries, except tgt_stop, which
 105  *     additionally protected by irq_cmd_count.
 106  */
 107 /* Predefs for callbacks handed to qla2xxx LLD */
 108 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 109         struct atio_from_isp *pkt, uint8_t);
 110 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 111         response_t *pkt);
 112 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 113         int fn, void *iocb, int flags);
 114 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 115         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 116 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 117         struct atio_from_isp *atio, uint16_t status, int qfull);
 118 static void qlt_disable_vha(struct scsi_qla_host *vha);
 119 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 120 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 121         struct imm_ntfy_from_isp *ntfy,
 122         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 123         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 124 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *imm, int ha_locked);
 126 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 127         fc_port_t *fcport, bool local);
 128 void qlt_unreg_sess(struct fc_port *sess);
 129 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 130         struct abts_recv_from_24xx *);
 131 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 132     uint16_t);
 133 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 134 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 struct kmem_cache *qla_tgt_plogi_cachep;
 141 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 142 static struct workqueue_struct *qla_tgt_wq;
 143 static DEFINE_MUTEX(qla_tgt_mutex);
 144 static LIST_HEAD(qla_tgt_glist);
 145
 146 static const char *prot_op_str(u32 prot_op)
 147 {
 148         switch (prot_op) {
 149         case TARGET_PROT_NORMAL:        return "NORMAL";
 150         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 151         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 152         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 153         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 154         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 155         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 156         default:                        return "UNKNOWN";
 157         }
 158 }
 159
 160 /* This API intentionally takes dest as a parameter, rather than returning
 161  * int value to avoid caller forgetting to issue wmb() after the store */
 162 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 163 {
 164         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 165         *dest = atomic_inc_return(&base_vha->generation_tick);
 166         /* memory barrier */
 167         wmb();
 168 }
 169
 170 /* Might release hw lock, then reaquire!! */
 171 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 172 {
 173         /* Send marker if required */
 174         if (unlikely(vha->marker_needed != 0)) {
 175                 int rc = qla2x00_issue_marker(vha, vha_locked);
 176
 177                 if (rc != QLA_SUCCESS) {
 178                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 179                             "qla_target(%d): issue_marker() failed\n",
 180                             vha->vp_idx);
 181                 }
 182                 return rc;
 183         }
 184         return QLA_SUCCESS;
 185 }
 186
 187 static inline
 188 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 189                                             be_id_t d_id)
 190 {
 191         struct scsi_qla_host *host;
 192         uint32_t key;
 193
 194         if (vha->d_id.b.area == d_id.area &&
 195             vha->d_id.b.domain == d_id.domain &&
 196             vha->d_id.b.al_pa == d_id.al_pa)
 197                 return vha;
 198
 199         key = be_to_port_id(d_id).b24;
 200
 201         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 202         if (!host)
 203                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 204                     "Unable to find host %06x\n", key);
 205
 206         return host;
 207 }
 208
 209 static inline
 210 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 211         uint16_t vp_idx)
 212 {
 213         struct qla_hw_data *ha = vha->hw;
 214
 215         if (vha->vp_idx == vp_idx)
 216                 return vha;
 217
 218         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 219         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 220                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 221
 222         return NULL;
 223 }
 224
 225 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 226 {
 227         unsigned long flags;
 228
 229         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 230
 231         vha->hw->tgt.num_pend_cmds++;
 232         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 233                 vha->qla_stats.stat_max_pend_cmds =
 234                         vha->hw->tgt.num_pend_cmds;
 235         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 236 }
 237 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 238 {
 239         unsigned long flags;
 240
 241         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 242         vha->hw->tgt.num_pend_cmds--;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245
 246
 247 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 248         struct atio_from_isp *atio, uint8_t ha_locked)
 249 {
 250         struct qla_tgt_sess_op *u;
 251         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 252         unsigned long flags;
 253
 254         if (tgt->tgt_stop) {
 255                 ql_dbg(ql_dbg_async, vha, 0x502c,
 256                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 257                     vha->vp_idx);
 258                 goto out_term;
 259         }
 260
 261         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 262         if (u == NULL)
 263                 goto out_term;
 264
 265         u->vha = vha;
 266         memcpy(&u->atio, atio, sizeof(*atio));
 267         INIT_LIST_HEAD(&u->cmd_list);
 268
 269         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 270         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 271         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 272
 273         schedule_delayed_work(&vha->unknown_atio_work, 1);
 274
 275 out:
 276         return;
 277
 278 out_term:
 279         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 280         goto out;
 281 }
 282
 283 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 284         uint8_t ha_locked)
 285 {
 286         struct qla_tgt_sess_op *u, *t;
 287         scsi_qla_host_t *host;
 288         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 289         unsigned long flags;
 290         uint8_t queued = 0;
 291
 292         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 293                 if (u->aborted) {
 294                         ql_dbg(ql_dbg_async, vha, 0x502e,
 295                             "Freeing unknown %s %p, because of Abort\n",
 296                             "ATIO_TYPE7", u);
 297                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 298                             &u->atio, ha_locked, 0);
 299                         goto abort;
 300                 }
 301
 302                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 303                 if (host != NULL) {
 304                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 305                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 306                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 307                 } else if (tgt->tgt_stop) {
 308                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 309                             "Freeing unknown %s %p, because tgt is being stopped\n",
 310                             "ATIO_TYPE7", u);
 311                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 312                             &u->atio, ha_locked, 0);
 313                 } else {
 314                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 315                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 316                         if (!queued) {
 317                                 queued = 1;
 318                                 schedule_delayed_work(&vha->unknown_atio_work,
 319                                     1);
 320                         }
 321                         continue;
 322                 }
 323
 324 abort:
 325                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 326                 list_del(&u->cmd_list);
 327                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 328                 kfree(u);
 329         }
 330 }
 331
 332 void qlt_unknown_atio_work_fn(struct work_struct *work)
 333 {
 334         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 335             struct scsi_qla_host, unknown_atio_work);
 336
 337         qlt_try_to_dequeue_unknown_atios(vha, 0);
 338 }
 339
 340 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 341         struct atio_from_isp *atio, uint8_t ha_locked)
 342 {
 343         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 344                 "%s: qla_target(%d): type %x ox_id %04x\n",
 345                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 346                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 347
 348         switch (atio->u.raw.entry_type) {
 349         case ATIO_TYPE7:
 350         {
 351                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 352                     atio->u.isp24.fcp_hdr.d_id);
 353                 if (unlikely(NULL == host)) {
 354                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 355                             "qla_target(%d): Received ATIO_TYPE7 "
 356                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 357                             atio->u.isp24.fcp_hdr.d_id.domain,
 358                             atio->u.isp24.fcp_hdr.d_id.area,
 359                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 360
 361
 362                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 363                         break;
 364                 }
 365                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 366                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 367
 368                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 369                 break;
 370         }
 371
 372         case IMMED_NOTIFY_TYPE:
 373         {
 374                 struct scsi_qla_host *host = vha;
 375                 struct imm_ntfy_from_isp *entry =
 376                     (struct imm_ntfy_from_isp *)atio;
 377
 378                 qlt_issue_marker(vha, ha_locked);
 379
 380                 if ((entry->u.isp24.vp_index != 0xFF) &&
 381                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 382                         host = qlt_find_host_by_vp_idx(vha,
 383                             entry->u.isp24.vp_index);
 384                         if (unlikely(!host)) {
 385                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 386                                     "qla_target(%d): Received "
 387                                     "ATIO (IMMED_NOTIFY_TYPE) "
 388                                     "with unknown vp_index %d\n",
 389                                     vha->vp_idx, entry->u.isp24.vp_index);
 390                                 break;
 391                         }
 392                 }
 393                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 394                 break;
 395         }
 396
 397         case VP_RPT_ID_IOCB_TYPE:
 398                 qla24xx_report_id_acquisition(vha,
 399                         (struct vp_rpt_id_entry_24xx *)atio);
 400                 break;
 401
 402         case ABTS_RECV_24XX:
 403         {
 404                 struct abts_recv_from_24xx *entry =
 405                         (struct abts_recv_from_24xx *)atio;
 406                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 407                         entry->vp_index);
 408                 unsigned long flags;
 409
 410                 if (unlikely(!host)) {
 411                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 412                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 413                             "received, with unknown vp_index %d\n",
 414                             vha->vp_idx, entry->vp_index);
 415                         break;
 416                 }
 417                 if (!ha_locked)
 418                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 419                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 420                 if (!ha_locked)
 421                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 422                 break;
 423         }
 424
 425         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 426
 427         default:
 428                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 429                     "qla_target(%d): Received unknown ATIO atio "
 430                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 431                 break;
 432         }
 433
 434         return false;
 435 }
 436
 437 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 438         struct rsp_que *rsp, response_t *pkt)
 439 {
 440         switch (pkt->entry_type) {
 441         case CTIO_CRC2:
 442                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 443                         "qla_target(%d):%s: CRC2 Response pkt\n",
 444                         vha->vp_idx, __func__);
 445                 fallthrough;
 446         case CTIO_TYPE7:
 447         {
 448                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 449                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 450                     entry->vp_index);
 451                 if (unlikely(!host)) {
 452                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 453                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 454                             "received, with unknown vp_index %d\n",
 455                             vha->vp_idx, entry->vp_index);
 456                         break;
 457                 }
 458                 qlt_response_pkt(host, rsp, pkt);
 459                 break;
 460         }
 461
 462         case IMMED_NOTIFY_TYPE:
 463         {
 464                 struct scsi_qla_host *host;
 465                 struct imm_ntfy_from_isp *entry =
 466                     (struct imm_ntfy_from_isp *)pkt;
 467
 468                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 469                 if (unlikely(!host)) {
 470                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 471                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 472                             "received, with unknown vp_index %d\n",
 473                             vha->vp_idx, entry->u.isp24.vp_index);
 474                         break;
 475                 }
 476                 qlt_response_pkt(host, rsp, pkt);
 477                 break;
 478         }
 479
 480         case NOTIFY_ACK_TYPE:
 481         {
 482                 struct scsi_qla_host *host = vha;
 483                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 484
 485                 if (0xFF != entry->u.isp24.vp_index) {
 486                         host = qlt_find_host_by_vp_idx(vha,
 487                             entry->u.isp24.vp_index);
 488                         if (unlikely(!host)) {
 489                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 490                                     "qla_target(%d): Response "
 491                                     "pkt (NOTIFY_ACK_TYPE) "
 492                                     "received, with unknown "
 493                                     "vp_index %d\n", vha->vp_idx,
 494                                     entry->u.isp24.vp_index);
 495                                 break;
 496                         }
 497                 }
 498                 qlt_response_pkt(host, rsp, pkt);
 499                 break;
 500         }
 501
 502         case ABTS_RECV_24XX:
 503         {
 504                 struct abts_recv_from_24xx *entry =
 505                     (struct abts_recv_from_24xx *)pkt;
 506                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 507                     entry->vp_index);
 508                 if (unlikely(!host)) {
 509                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 510                             "qla_target(%d): Response pkt "
 511                             "(ABTS_RECV_24XX) received, with unknown "
 512                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 513                         break;
 514                 }
 515                 qlt_response_pkt(host, rsp, pkt);
 516                 break;
 517         }
 518
 519         case ABTS_RESP_24XX:
 520         {
 521                 struct abts_resp_to_24xx *entry =
 522                     (struct abts_resp_to_24xx *)pkt;
 523                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 524                     entry->vp_index);
 525                 if (unlikely(!host)) {
 526                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 527                             "qla_target(%d): Response pkt "
 528                             "(ABTS_RECV_24XX) received, with unknown "
 529                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 530                         break;
 531                 }
 532                 qlt_response_pkt(host, rsp, pkt);
 533                 break;
 534         }
 535         default:
 536                 qlt_response_pkt(vha, rsp, pkt);
 537                 break;
 538         }
 539
 540 }
 541
 542 /*
 543  * All qlt_plogi_ack_t operations are protected by hardware_lock
 544  */
 545 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 546         struct imm_ntfy_from_isp *ntfy, int type)
 547 {
 548         struct qla_work_evt *e;
 549
 550         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 551         if (!e)
 552                 return QLA_FUNCTION_FAILED;
 553
 554         e->u.nack.fcport = fcport;
 555         e->u.nack.type = type;
 556         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 557         return qla2x00_post_work(vha, e);
 558 }
 559
 560 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 561 {
 562         struct scsi_qla_host *vha = sp->vha;
 563         unsigned long flags;
 564
 565         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 566             "Async done-%s res %x %8phC  type %d\n",
 567             sp->name, res, sp->fcport->port_name, sp->type);
 568
 569         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 570         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 571         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 572
 573         switch (sp->type) {
 574         case SRB_NACK_PLOGI:
 575                 sp->fcport->login_gen++;
 576                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 577                 sp->fcport->logout_on_delete = 1;
 578                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 579                 sp->fcport->send_els_logo = 0;
 580                 break;
 581
 582         case SRB_NACK_PRLI:
 583                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 584                 sp->fcport->deleted = 0;
 585                 sp->fcport->send_els_logo = 0;
 586
 587                 if (!sp->fcport->login_succ &&
 588                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 589                         sp->fcport->login_succ = 1;
 590
 591                         vha->fcport_count++;
 592                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 593                         qla24xx_sched_upd_fcport(sp->fcport);
 594                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 595                 } else {
 596                         sp->fcport->login_retry = 0;
 597                         qla2x00_set_fcport_disc_state(sp->fcport,
 598                             DSC_LOGIN_COMPLETE);
 599                         sp->fcport->deleted = 0;
 600                         sp->fcport->logout_on_delete = 1;
 601                 }
 602                 break;
 603
 604         case SRB_NACK_LOGO:
 605                 sp->fcport->login_gen++;
 606                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 607                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 608                 break;
 609         }
 610         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 611
 612         sp->free(sp);
 613 }
 614
 615 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 616         struct imm_ntfy_from_isp *ntfy, int type)
 617 {
 618         int rval = QLA_FUNCTION_FAILED;
 619         srb_t *sp;
 620         char *c = NULL;
 621
 622         fcport->flags |= FCF_ASYNC_SENT;
 623         switch (type) {
 624         case SRB_NACK_PLOGI:
 625                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 626                 c = "PLOGI";
 627                 break;
 628         case SRB_NACK_PRLI:
 629                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 630                 fcport->deleted = 0;
 631                 c = "PRLI";
 632                 break;
 633         case SRB_NACK_LOGO:
 634                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 635                 c = "LOGO";
 636                 break;
 637         }
 638
 639         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 640         if (!sp)
 641                 goto done;
 642
 643         sp->type = type;
 644         sp->name = "nack";
 645
 646         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 647         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 648
 649         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 650         sp->done = qla2x00_async_nack_sp_done;
 651
 652         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 653             "Async-%s %8phC hndl %x %s\n",
 654             sp->name, fcport->port_name, sp->handle, c);
 655
 656         rval = qla2x00_start_sp(sp);
 657         if (rval != QLA_SUCCESS)
 658                 goto done_free_sp;
 659
 660         return rval;
 661
 662 done_free_sp:
 663         sp->free(sp);
 664 done:
 665         fcport->flags &= ~FCF_ASYNC_SENT;
 666         return rval;
 667 }
 668
 669 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 670 {
 671         fc_port_t *t;
 672
 673         switch (e->u.nack.type) {
 674         case SRB_NACK_PRLI:
 675                 t = e->u.nack.fcport;
 676                 flush_work(&t->del_work);
 677                 flush_work(&t->free_work);
 678                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 679                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 680                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 681                 if (t) {
 682                         ql_log(ql_log_info, vha, 0xd034,
 683                             "%s create sess success %p", __func__, t);
 684                         /* create sess has an extra kref */
 685                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 686                 }
 687                 break;
 688         }
 689         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 690             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 691 }
 692
 693 void qla24xx_delete_sess_fn(struct work_struct *work)
 694 {
 695         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 696         struct qla_hw_data *ha = fcport->vha->hw;
 697
 698         if (fcport->se_sess) {
 699                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 700                 ha->tgt.tgt_ops->put_sess(fcport);
 701         } else {
 702                 qlt_unreg_sess(fcport);
 703         }
 704 }
 705
 706 /*
 707  * Called from qla2x00_reg_remote_port()
 708  */
 709 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 710 {
 711         struct qla_hw_data *ha = vha->hw;
 712         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 713         struct fc_port *sess = fcport;
 714         unsigned long flags;
 715
 716         if (!vha->hw->tgt.tgt_ops)
 717                 return;
 718
 719         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 720         if (tgt->tgt_stop) {
 721                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 722                 return;
 723         }
 724
 725         if (fcport->disc_state == DSC_DELETE_PEND) {
 726                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 727                 return;
 728         }
 729
 730         if (!sess->se_sess) {
 731                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 732
 733                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 734                 sess = qlt_create_sess(vha, fcport, false);
 735                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 736
 737                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 738         } else {
 739                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 740                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 741                         return;
 742                 }
 743
 744                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 745                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 746                             "%s: kref_get fail sess %8phC \n",
 747                             __func__, sess->port_name);
 748                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 749                         return;
 750                 }
 751
 752                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 753                     "qla_target(%u): %ssession for port %8phC "
 754                     "(loop ID %d) reappeared\n", vha->vp_idx,
 755                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 756
 757                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 758                     "Reappeared sess %p\n", sess);
 759
 760                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 761                     fcport->loop_id,
 762                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 763         }
 764
 765         if (sess && sess->local) {
 766                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 767                     "qla_target(%u): local session for "
 768                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 769                     fcport->port_name, sess->loop_id);
 770                 sess->local = 0;
 771         }
 772         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 773
 774         ha->tgt.tgt_ops->put_sess(sess);
 775 }
 776
 777 /*
 778  * This is a zero-base ref-counting solution, since hardware_lock
 779  * guarantees that ref_count is not modified concurrently.
 780  * Upon successful return content of iocb is undefined
 781  */
 782 static struct qlt_plogi_ack_t *
 783 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 784                        struct imm_ntfy_from_isp *iocb)
 785 {
 786         struct qlt_plogi_ack_t *pla;
 787
 788         lockdep_assert_held(&vha->hw->hardware_lock);
 789
 790         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 791                 if (pla->id.b24 == id->b24) {
 792                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 793                             "%s %d %8phC Term INOT due to new INOT",
 794                             __func__, __LINE__,
 795                             pla->iocb.u.isp24.port_name);
 796                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 797                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 798                         return pla;
 799                 }
 800         }
 801
 802         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 803         if (!pla) {
 804                 ql_dbg(ql_dbg_async, vha, 0x5088,
 805                        "qla_target(%d): Allocation of plogi_ack failed\n",
 806                        vha->vp_idx);
 807                 return NULL;
 808         }
 809
 810         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 811         pla->id = *id;
 812         list_add_tail(&pla->list, &vha->plogi_ack_list);
 813
 814         return pla;
 815 }
 816
 817 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 818     struct qlt_plogi_ack_t *pla)
 819 {
 820         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 821         port_id_t port_id;
 822         uint16_t loop_id;
 823         fc_port_t *fcport = pla->fcport;
 824
 825         BUG_ON(!pla->ref_count);
 826         pla->ref_count--;
 827
 828         if (pla->ref_count)
 829                 return;
 830
 831         ql_dbg(ql_dbg_disc, vha, 0x5089,
 832             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 833             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 834             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 835             iocb->u.isp24.port_id[0],
 836             le16_to_cpu(iocb->u.isp24.nport_handle),
 837             iocb->u.isp24.exchange_address, iocb->ox_id);
 838
 839         port_id.b.domain = iocb->u.isp24.port_id[2];
 840         port_id.b.area   = iocb->u.isp24.port_id[1];
 841         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 842         port_id.b.rsvd_1 = 0;
 843
 844         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 845
 846         fcport->loop_id = loop_id;
 847         fcport->d_id = port_id;
 848         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 849                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 850         else
 851                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 852
 853         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 854                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 855                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 856                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 857                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 858         }
 859
 860         list_del(&pla->list);
 861         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 862 }
 863
 864 void
 865 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 866     struct fc_port *sess, enum qlt_plogi_link_t link)
 867 {
 868         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 869         /* Inc ref_count first because link might already be pointing at pla */
 870         pla->ref_count++;
 871
 872         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 873                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 874                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 875                 sess, link, sess->port_name,
 876                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 877                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 878                 pla->ref_count, pla, link);
 879
 880         if (link == QLT_PLOGI_LINK_CONFLICT) {
 881                 switch (sess->disc_state) {
 882                 case DSC_DELETED:
 883                 case DSC_DELETE_PEND:
 884                         pla->ref_count--;
 885                         return;
 886                 default:
 887                         break;
 888                 }
 889         }
 890
 891         if (sess->plogi_link[link])
 892                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 893
 894         if (link == QLT_PLOGI_LINK_SAME_WWN)
 895                 pla->fcport = sess;
 896
 897         sess->plogi_link[link] = pla;
 898 }
 899
 900 typedef struct {
 901         /* These fields must be initialized by the caller */
 902         port_id_t id;
 903         /*
 904          * number of cmds dropped while we were waiting for
 905          * initiator to ack LOGO initialize to 1 if LOGO is
 906          * triggered by a command, otherwise, to 0
 907          */
 908         int cmd_count;
 909
 910         /* These fields are used by callee */
 911         struct list_head list;
 912 } qlt_port_logo_t;
 913
 914 static void
 915 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 916 {
 917         qlt_port_logo_t *tmp;
 918         int res;
 919
 920         mutex_lock(&vha->vha_tgt.tgt_mutex);
 921
 922         list_for_each_entry(tmp, &vha->logo_list, list) {
 923                 if (tmp->id.b24 == logo->id.b24) {
 924                         tmp->cmd_count += logo->cmd_count;
 925                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 926                         return;
 927                 }
 928         }
 929
 930         list_add_tail(&logo->list, &vha->logo_list);
 931
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 935
 936         mutex_lock(&vha->vha_tgt.tgt_mutex);
 937         list_del(&logo->list);
 938         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 939
 940         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 941             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 942             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 943             logo->cmd_count, res);
 944 }
 945
 946 void qlt_free_session_done(struct work_struct *work)
 947 {
 948         struct fc_port *sess = container_of(work, struct fc_port,
 949             free_work);
 950         struct qla_tgt *tgt = sess->tgt;
 951         struct scsi_qla_host *vha = sess->vha;
 952         struct qla_hw_data *ha = vha->hw;
 953         unsigned long flags;
 954         bool logout_started = false;
 955         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 956         struct qlt_plogi_ack_t *own =
 957                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 958
 959         ql_dbg(ql_dbg_disc, vha, 0xf084,
 960                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 961                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 962                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 963                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 964                 sess->logout_on_delete, sess->keep_nport_handle,
 965                 sess->send_els_logo);
 966
 967         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 968                 qla2x00_mark_device_lost(vha, sess, 0);
 969
 970                 if (sess->send_els_logo) {
 971                         qlt_port_logo_t logo;
 972
 973                         logo.id = sess->d_id;
 974                         logo.cmd_count = 0;
 975                         if (!own)
 976                                 qlt_send_first_logo(vha, &logo);
 977                         sess->send_els_logo = 0;
 978                 }
 979
 980                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 981                         int rc;
 982
 983                         if (!own ||
 984                             (own &&
 985                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 986                                 rc = qla2x00_post_async_logout_work(vha, sess,
 987                                     NULL);
 988                                 if (rc != QLA_SUCCESS)
 989                                         ql_log(ql_log_warn, vha, 0xf085,
 990                                             "Schedule logo failed sess %p rc %d\n",
 991                                             sess, rc);
 992                                 else
 993                                         logout_started = true;
 994                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 995                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 996                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 997                                     NULL);
 998                                 if (rc != QLA_SUCCESS)
 999                                         ql_log(ql_log_warn, vha, 0xf085,
1000                                             "Schedule PRLO failed sess %p rc %d\n",
1001                                             sess, rc);
1002                                 else
1003                                         logout_started = true;
1004                         }
1005                 } /* if sess->logout_on_delete */
1006
1007                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1008                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1009                         sess->nvme_flag |= NVME_FLAG_DELETING;
1010                         qla_nvme_unregister_remote_port(sess);
1011                 }
1012         }
1013
1014         /*
1015          * Release the target session for FC Nexus from fabric module code.
1016          */
1017         if (sess->se_sess != NULL)
1018                 ha->tgt.tgt_ops->free_session(sess);
1019
1020         if (logout_started) {
1021                 bool traced = false;
1022                 u16 cnt = 0;
1023
1024                 while (!READ_ONCE(sess->logout_completed)) {
1025                         if (!traced) {
1026                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1027                                         "%s: waiting for sess %p logout\n",
1028                                         __func__, sess);
1029                                 traced = true;
1030                         }
1031                         msleep(100);
1032                         cnt++;
1033                         if (cnt > 200)
1034                                 break;
1035                 }
1036
1037                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1038                     "%s: sess %p logout completed\n", __func__, sess);
1039         }
1040
1041         if (sess->logo_ack_needed) {
1042                 sess->logo_ack_needed = 0;
1043                 qla24xx_async_notify_ack(vha, sess,
1044                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1045         }
1046
1047         spin_lock_irqsave(&vha->work_lock, flags);
1048         sess->flags &= ~FCF_ASYNC_SENT;
1049         spin_unlock_irqrestore(&vha->work_lock, flags);
1050
1051         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1052         if (sess->se_sess) {
1053                 sess->se_sess = NULL;
1054                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1055                         tgt->sess_count--;
1056         }
1057
1058         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1059         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1060         sess->deleted = QLA_SESS_DELETED;
1061
1062         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1063                 vha->fcport_count--;
1064                 sess->login_succ = 0;
1065         }
1066
1067         qla2x00_clear_loop_id(sess);
1068
1069         if (sess->conflict) {
1070                 sess->conflict->login_pause = 0;
1071                 sess->conflict = NULL;
1072                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1073                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1074         }
1075
1076         {
1077                 struct qlt_plogi_ack_t *con =
1078                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1079                 struct imm_ntfy_from_isp *iocb;
1080
1081                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1082
1083                 if (con) {
1084                         iocb = &con->iocb;
1085                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1086                                  "se_sess %p / sess %p port %8phC is gone,"
1087                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1088                                  sess->se_sess, sess, sess->port_name,
1089                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1090                                  own ? own->ref_count : -1,
1091                                  iocb->u.isp24.port_name, con->ref_count);
1092                         qlt_plogi_ack_unref(vha, con);
1093                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1094                 } else {
1095                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1096                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1097                             sess->se_sess, sess, sess->port_name,
1098                             own ? "releasing own PLOGI" :
1099                             "no own PLOGI pending",
1100                             own ? own->ref_count : -1);
1101                 }
1102
1103                 if (own) {
1104                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1105                         qlt_plogi_ack_unref(vha, own);
1106                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1107                 }
1108         }
1109
1110         sess->explicit_logout = 0;
1111         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1112         sess->free_pending = 0;
1113
1114         qla2x00_dfs_remove_rport(vha, sess);
1115
1116         ql_dbg(ql_dbg_disc, vha, 0xf001,
1117             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1118                 sess, sess->port_name, vha->fcport_count);
1119
1120         if (tgt && (tgt->sess_count == 0))
1121                 wake_up_all(&tgt->waitQ);
1122
1123         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1124             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1125             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1126                 switch (vha->host->active_mode) {
1127                 case MODE_INITIATOR:
1128                 case MODE_DUAL:
1129                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1130                         qla2xxx_wake_dpc(vha);
1131                         break;
1132                 case MODE_TARGET:
1133                 default:
1134                         /* no-op */
1135                         break;
1136                 }
1137         }
1138
1139         if (vha->fcport_count == 0)
1140                 wake_up_all(&vha->fcport_waitQ);
1141 }
1142
1143 /* ha->tgt.sess_lock supposed to be held on entry */
1144 void qlt_unreg_sess(struct fc_port *sess)
1145 {
1146         struct scsi_qla_host *vha = sess->vha;
1147         unsigned long flags;
1148
1149         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1150             "%s sess %p for deletion %8phC\n",
1151             __func__, sess, sess->port_name);
1152
1153         spin_lock_irqsave(&sess->vha->work_lock, flags);
1154         if (sess->free_pending) {
1155                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1156                 return;
1157         }
1158         sess->free_pending = 1;
1159         /*
1160          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1161          * management from being sent.
1162          */
1163         sess->flags |= FCF_ASYNC_SENT;
1164         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1165
1166         if (sess->se_sess)
1167                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1168
1169         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1170         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1171         sess->last_rscn_gen = sess->rscn_gen;
1172         sess->last_login_gen = sess->login_gen;
1173
1174         queue_work(sess->vha->hw->wq, &sess->free_work);
1175 }
1176 EXPORT_SYMBOL(qlt_unreg_sess);
1177
1178 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1179 {
1180         struct qla_hw_data *ha = vha->hw;
1181         struct fc_port *sess = NULL;
1182         uint16_t loop_id;
1183         int res = 0;
1184         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1185         unsigned long flags;
1186
1187         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1188         if (loop_id == 0xFFFF) {
1189                 /* Global event */
1190                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1191                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1192                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1193                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1194         } else {
1195                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1196                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1197                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1198         }
1199
1200         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1201             "Using sess for qla_tgt_reset: %p\n", sess);
1202         if (!sess) {
1203                 res = -ESRCH;
1204                 return res;
1205         }
1206
1207         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1208             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1209             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1210             mcmd, loop_id);
1211
1212         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1213 }
1214
1215 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1216 {
1217         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1218                 sess->logout_on_delete = 0;
1219                 sess->logo_ack_needed = 0;
1220                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1221         }
1222 }
1223
1224 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1225 {
1226         struct qla_tgt *tgt = sess->tgt;
1227         unsigned long flags;
1228         u16 sec;
1229
1230         switch (sess->disc_state) {
1231         case DSC_DELETE_PEND:
1232                 return;
1233         case DSC_DELETED:
1234                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1235                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1236                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1237                                 wake_up_all(&tgt->waitQ);
1238
1239                         if (sess->vha->fcport_count == 0)
1240                                 wake_up_all(&sess->vha->fcport_waitQ);
1241                         return;
1242                 }
1243                 break;
1244         case DSC_UPD_FCPORT:
1245                 /*
1246                  * This port is not done reporting to upper layer.
1247                  * let it finish
1248                  */
1249                 sess->next_disc_state = DSC_DELETE_PEND;
1250                 sec = jiffies_to_msecs(jiffies -
1251                     sess->jiffies_at_registration)/1000;
1252                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1253                         sess->sec_since_registration = sec;
1254                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1255                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1256                             __func__, sess->port_name, sec);
1257                 }
1258                 return;
1259         default:
1260                 break;
1261         }
1262
1263         spin_lock_irqsave(&sess->vha->work_lock, flags);
1264         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1265                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1266                 return;
1267         }
1268         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1269         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1270
1271         sess->prli_pend_timer = 0;
1272         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1273
1274         qla24xx_chk_fcp_state(sess);
1275
1276         ql_dbg(ql_dbg_disc, sess->vha, 0xe001,
1277             "Scheduling sess %p for deletion %8phC\n",
1278             sess, sess->port_name);
1279
1280         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1281 }
1282
1283 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1284 {
1285         struct fc_port *sess;
1286         scsi_qla_host_t *vha = tgt->vha;
1287
1288         list_for_each_entry(sess, &vha->vp_fcports, list) {
1289                 if (sess->se_sess)
1290                         qlt_schedule_sess_for_deletion(sess);
1291         }
1292
1293         /* At this point tgt could be already dead */
1294 }
1295
1296 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1297         uint16_t *loop_id)
1298 {
1299         struct qla_hw_data *ha = vha->hw;
1300         dma_addr_t gid_list_dma;
1301         struct gid_list_info *gid_list, *gid;
1302         int res, rc, i;
1303         uint16_t entries;
1304
1305         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1306             &gid_list_dma, GFP_KERNEL);
1307         if (!gid_list) {
1308                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1309                     "qla_target(%d): DMA Alloc failed of %u\n",
1310                     vha->vp_idx, qla2x00_gid_list_size(ha));
1311                 return -ENOMEM;
1312         }
1313
1314         /* Get list of logged in devices */
1315         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1316         if (rc != QLA_SUCCESS) {
1317                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1318                     "qla_target(%d): get_id_list() failed: %x\n",
1319                     vha->vp_idx, rc);
1320                 res = -EBUSY;
1321                 goto out_free_id_list;
1322         }
1323
1324         gid = gid_list;
1325         res = -ENOENT;
1326         for (i = 0; i < entries; i++) {
1327                 if (gid->al_pa == s_id.al_pa &&
1328                     gid->area == s_id.area &&
1329                     gid->domain == s_id.domain) {
1330                         *loop_id = le16_to_cpu(gid->loop_id);
1331                         res = 0;
1332                         break;
1333                 }
1334                 gid = (void *)gid + ha->gid_list_info_size;
1335         }
1336
1337 out_free_id_list:
1338         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1339             gid_list, gid_list_dma);
1340         return res;
1341 }
1342
1343 /*
1344  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1345  * Caller must put it.
1346  */
1347 static struct fc_port *qlt_create_sess(
1348         struct scsi_qla_host *vha,
1349         fc_port_t *fcport,
1350         bool local)
1351 {
1352         struct qla_hw_data *ha = vha->hw;
1353         struct fc_port *sess = fcport;
1354         unsigned long flags;
1355
1356         if (vha->vha_tgt.qla_tgt->tgt_stop)
1357                 return NULL;
1358
1359         if (fcport->se_sess) {
1360                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1361                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1362                             "%s: kref_get_unless_zero failed for %8phC\n",
1363                             __func__, sess->port_name);
1364                         return NULL;
1365                 }
1366                 return fcport;
1367         }
1368         sess->tgt = vha->vha_tgt.qla_tgt;
1369         sess->local = local;
1370
1371         /*
1372          * Under normal circumstances we want to logout from firmware when
1373          * session eventually ends and release corresponding nport handle.
1374          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1375          * code will adjust these flags as necessary.
1376          */
1377         sess->logout_on_delete = 1;
1378         sess->keep_nport_handle = 0;
1379         sess->logout_completed = 0;
1380
1381         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1382             &fcport->port_name[0], sess) < 0) {
1383                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1384                     "(%d) %8phC check_initiator_node_acl failed\n",
1385                     vha->vp_idx, fcport->port_name);
1386                 return NULL;
1387         } else {
1388                 kref_init(&fcport->sess_kref);
1389                 /*
1390                  * Take an extra reference to ->sess_kref here to handle
1391                  * fc_port access across ->tgt.sess_lock reaquire.
1392                  */
1393                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1394                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1395                             "%s: kref_get_unless_zero failed for %8phC\n",
1396                             __func__, sess->port_name);
1397                         return NULL;
1398                 }
1399
1400                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1401                 if (!IS_SW_RESV_ADDR(sess->d_id))
1402                         vha->vha_tgt.qla_tgt->sess_count++;
1403
1404                 qlt_do_generation_tick(vha, &sess->generation);
1405                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1406         }
1407
1408         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1409             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1410             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1411             vha->vha_tgt.qla_tgt->sess_count);
1412
1413         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1414             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1415             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1416             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1417             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1418             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1419
1420         return sess;
1421 }
1422
1423 /*
1424  * max_gen - specifies maximum session generation
1425  * at which this deletion requestion is still valid
1426  */
1427 void
1428 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1429 {
1430         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1431         struct fc_port *sess = fcport;
1432         unsigned long flags;
1433
1434         if (!vha->hw->tgt.tgt_ops)
1435                 return;
1436
1437         if (!tgt)
1438                 return;
1439
1440         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1441         if (tgt->tgt_stop) {
1442                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1443                 return;
1444         }
1445         if (!sess->se_sess) {
1446                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1447                 return;
1448         }
1449
1450         if (max_gen - sess->generation < 0) {
1451                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1452                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1453                     "Ignoring stale deletion request for se_sess %p / sess %p"
1454                     " for port %8phC, req_gen %d, sess_gen %d\n",
1455                     sess->se_sess, sess, sess->port_name, max_gen,
1456                     sess->generation);
1457                 return;
1458         }
1459
1460         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1461
1462         sess->local = 1;
1463         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1464         qlt_schedule_sess_for_deletion(sess);
1465 }
1466
1467 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1468 {
1469         struct qla_hw_data *ha = tgt->ha;
1470         unsigned long flags;
1471         int res;
1472         /*
1473          * We need to protect against race, when tgt is freed before or
1474          * inside wake_up()
1475          */
1476         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1477         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1478             "tgt %p, sess_count=%d\n",
1479             tgt, tgt->sess_count);
1480         res = (tgt->sess_count == 0);
1481         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1482
1483         return res;
1484 }
1485
1486 /* Called by tcm_qla2xxx configfs code */
1487 int qlt_stop_phase1(struct qla_tgt *tgt)
1488 {
1489         struct scsi_qla_host *vha = tgt->vha;
1490         struct qla_hw_data *ha = tgt->ha;
1491         unsigned long flags;
1492
1493         mutex_lock(&ha->optrom_mutex);
1494         mutex_lock(&qla_tgt_mutex);
1495
1496         if (tgt->tgt_stop || tgt->tgt_stopped) {
1497                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1498                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1499                 mutex_unlock(&qla_tgt_mutex);
1500                 mutex_unlock(&ha->optrom_mutex);
1501                 return -EPERM;
1502         }
1503
1504         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1505             vha->host_no, vha);
1506         /*
1507          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1508          * Lock is needed, because we still can get an incoming packet.
1509          */
1510         mutex_lock(&vha->vha_tgt.tgt_mutex);
1511         tgt->tgt_stop = 1;
1512         qlt_clear_tgt_db(tgt);
1513         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1514         mutex_unlock(&qla_tgt_mutex);
1515
1516         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1517             "Waiting for sess works (tgt %p)", tgt);
1518         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1519         while (!list_empty(&tgt->sess_works_list)) {
1520                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1521                 flush_scheduled_work();
1522                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1523         }
1524         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1525
1526         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1527             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1528
1529         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1530
1531         /* Big hammer */
1532         if (!ha->flags.host_shutting_down &&
1533             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1534                 qlt_disable_vha(vha);
1535
1536         /* Wait for sessions to clear out (just in case) */
1537         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1538         mutex_unlock(&ha->optrom_mutex);
1539
1540         return 0;
1541 }
1542 EXPORT_SYMBOL(qlt_stop_phase1);
1543
1544 /* Called by tcm_qla2xxx configfs code */
1545 void qlt_stop_phase2(struct qla_tgt *tgt)
1546 {
1547         scsi_qla_host_t *vha = tgt->vha;
1548
1549         if (tgt->tgt_stopped) {
1550                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1551                     "Already in tgt->tgt_stopped state\n");
1552                 dump_stack();
1553                 return;
1554         }
1555         if (!tgt->tgt_stop) {
1556                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1557                     "%s: phase1 stop is not completed\n", __func__);
1558                 dump_stack();
1559                 return;
1560         }
1561
1562         mutex_lock(&vha->vha_tgt.tgt_mutex);
1563         tgt->tgt_stop = 0;
1564         tgt->tgt_stopped = 1;
1565         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1566
1567         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1568             tgt);
1569
1570         switch (vha->qlini_mode) {
1571         case QLA2XXX_INI_MODE_EXCLUSIVE:
1572                 vha->flags.online = 1;
1573                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1574                 break;
1575         default:
1576                 break;
1577         }
1578 }
1579 EXPORT_SYMBOL(qlt_stop_phase2);
1580
1581 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1582 static void qlt_release(struct qla_tgt *tgt)
1583 {
1584         scsi_qla_host_t *vha = tgt->vha;
1585         void *node;
1586         u64 key = 0;
1587         u16 i;
1588         struct qla_qpair_hint *h;
1589         struct qla_hw_data *ha = vha->hw;
1590
1591         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1592                 qlt_stop_phase1(tgt);
1593
1594         if (!tgt->tgt_stopped)
1595                 qlt_stop_phase2(tgt);
1596
1597         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1598                 unsigned long flags;
1599
1600                 h = &tgt->qphints[i];
1601                 if (h->qpair) {
1602                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1603                         list_del(&h->hint_elem);
1604                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1605                         h->qpair = NULL;
1606                 }
1607         }
1608         kfree(tgt->qphints);
1609         mutex_lock(&qla_tgt_mutex);
1610         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1611         mutex_unlock(&qla_tgt_mutex);
1612
1613         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1614                 btree_remove64(&tgt->lun_qpair_map, key);
1615
1616         btree_destroy64(&tgt->lun_qpair_map);
1617
1618         if (vha->vp_idx)
1619                 if (ha->tgt.tgt_ops &&
1620                     ha->tgt.tgt_ops->remove_target &&
1621                     vha->vha_tgt.target_lport_ptr)
1622                         ha->tgt.tgt_ops->remove_target(vha);
1623
1624         vha->vha_tgt.qla_tgt = NULL;
1625
1626         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1627             "Release of tgt %p finished\n", tgt);
1628
1629         kfree(tgt);
1630 }
1631
1632 /* ha->hardware_lock supposed to be held on entry */
1633 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1634         const void *param, unsigned int param_size)
1635 {
1636         struct qla_tgt_sess_work_param *prm;
1637         unsigned long flags;
1638
1639         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1640         if (!prm) {
1641                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1642                     "qla_target(%d): Unable to create session "
1643                     "work, command will be refused", 0);
1644                 return -ENOMEM;
1645         }
1646
1647         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1648             "Scheduling work (type %d, prm %p)"
1649             " to find session for param %p (size %d, tgt %p)\n",
1650             type, prm, param, param_size, tgt);
1651
1652         prm->type = type;
1653         memcpy(&prm->tm_iocb, param, param_size);
1654
1655         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1656         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1657         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1658
1659         schedule_work(&tgt->sess_work);
1660
1661         return 0;
1662 }
1663
1664 /*
1665  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1666  */
1667 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1668         struct imm_ntfy_from_isp *ntfy,
1669         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1670         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1671 {
1672         struct scsi_qla_host *vha = qpair->vha;
1673         struct qla_hw_data *ha = vha->hw;
1674         request_t *pkt;
1675         struct nack_to_isp *nack;
1676
1677         if (!ha->flags.fw_started)
1678                 return;
1679
1680         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1681
1682         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1683         if (!pkt) {
1684                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1685                     "qla_target(%d): %s failed: unable to allocate "
1686                     "request packet\n", vha->vp_idx, __func__);
1687                 return;
1688         }
1689
1690         if (vha->vha_tgt.qla_tgt != NULL)
1691                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1692
1693         pkt->entry_type = NOTIFY_ACK_TYPE;
1694         pkt->entry_count = 1;
1695
1696         nack = (struct nack_to_isp *)pkt;
1697         nack->ox_id = ntfy->ox_id;
1698
1699         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1700         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1701         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1702                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1703                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1704         }
1705         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1706         nack->u.isp24.status = ntfy->u.isp24.status;
1707         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1708         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1709         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1710         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1711         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1712         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1713         nack->u.isp24.srr_reject_code = srr_reject_code;
1714         nack->u.isp24.srr_reject_code_expl = srr_explan;
1715         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1716
1717         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1718             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1719             vha->vp_idx, nack->u.isp24.status);
1720
1721         /* Memory Barrier */
1722         wmb();
1723         qla2x00_start_iocbs(vha, qpair->req);
1724 }
1725
1726 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1727 {
1728         struct scsi_qla_host *vha = mcmd->vha;
1729         struct qla_hw_data *ha = vha->hw;
1730         struct abts_resp_to_24xx *resp;
1731         __le32 f_ctl;
1732         uint32_t h;
1733         uint8_t *p;
1734         int rc;
1735         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1736         struct qla_qpair *qpair = mcmd->qpair;
1737
1738         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1739             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1740             ha, mcmd->fc_tm_rsp);
1741
1742         rc = qlt_check_reserve_free_req(qpair, 1);
1743         if (rc) {
1744                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1745                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1746                     vha->vp_idx, __func__);
1747                 return -EAGAIN;
1748         }
1749
1750         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1751         memset(resp, 0, sizeof(*resp));
1752
1753         h = qlt_make_handle(qpair);
1754         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1755                 /*
1756                  * CTIO type 7 from the firmware doesn't provide a way to
1757                  * know the initiator's LOOP ID, hence we can't find
1758                  * the session and, so, the command.
1759                  */
1760                 return -EAGAIN;
1761         } else {
1762                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1763         }
1764
1765         resp->handle = make_handle(qpair->req->id, h);
1766         resp->entry_type = ABTS_RESP_24XX;
1767         resp->entry_count = 1;
1768         resp->nport_handle = abts->nport_handle;
1769         resp->vp_index = vha->vp_idx;
1770         resp->sof_type = abts->sof_type;
1771         resp->exchange_address = abts->exchange_address;
1772         resp->fcp_hdr_le = abts->fcp_hdr_le;
1773         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1774             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1775             F_CTL_SEQ_INITIATIVE);
1776         p = (uint8_t *)&f_ctl;
1777         resp->fcp_hdr_le.f_ctl[0] = *p++;
1778         resp->fcp_hdr_le.f_ctl[1] = *p++;
1779         resp->fcp_hdr_le.f_ctl[2] = *p;
1780
1781         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1782         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1783
1784         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1785         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1786                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1787                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1788                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1789                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1790                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1791                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1792         } else {
1793                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1794                 resp->payload.ba_rjt.reason_code =
1795                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1796                 /* Other bytes are zero */
1797         }
1798
1799         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1800
1801         /* Memory Barrier */
1802         wmb();
1803         if (qpair->reqq_start_iocbs)
1804                 qpair->reqq_start_iocbs(qpair);
1805         else
1806                 qla2x00_start_iocbs(vha, qpair->req);
1807
1808         return rc;
1809 }
1810
1811 /*
1812  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1813  */
1814 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1815         struct abts_recv_from_24xx *abts, uint32_t status,
1816         bool ids_reversed)
1817 {
1818         struct scsi_qla_host *vha = qpair->vha;
1819         struct qla_hw_data *ha = vha->hw;
1820         struct abts_resp_to_24xx *resp;
1821         __le32 f_ctl;
1822         uint8_t *p;
1823
1824         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1825             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1826             ha, abts, status);
1827
1828         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1829             NULL);
1830         if (!resp) {
1831                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1832                     "qla_target(%d): %s failed: unable to allocate "
1833                     "request packet", vha->vp_idx, __func__);
1834                 return;
1835         }
1836
1837         resp->entry_type = ABTS_RESP_24XX;
1838         resp->handle = QLA_TGT_SKIP_HANDLE;
1839         resp->entry_count = 1;
1840         resp->nport_handle = abts->nport_handle;
1841         resp->vp_index = vha->vp_idx;
1842         resp->sof_type = abts->sof_type;
1843         resp->exchange_address = abts->exchange_address;
1844         resp->fcp_hdr_le = abts->fcp_hdr_le;
1845         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1846             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1847             F_CTL_SEQ_INITIATIVE);
1848         p = (uint8_t *)&f_ctl;
1849         resp->fcp_hdr_le.f_ctl[0] = *p++;
1850         resp->fcp_hdr_le.f_ctl[1] = *p++;
1851         resp->fcp_hdr_le.f_ctl[2] = *p;
1852         if (ids_reversed) {
1853                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1854                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1855         } else {
1856                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1857                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1858         }
1859         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1860         if (status == FCP_TMF_CMPL) {
1861                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1862                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1863                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1864                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1865                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1866                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1867         } else {
1868                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1869                 resp->payload.ba_rjt.reason_code =
1870                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1871                 /* Other bytes are zero */
1872         }
1873
1874         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1875
1876         /* Memory Barrier */
1877         wmb();
1878         if (qpair->reqq_start_iocbs)
1879                 qpair->reqq_start_iocbs(qpair);
1880         else
1881                 qla2x00_start_iocbs(vha, qpair->req);
1882 }
1883
1884 /*
1885  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1886  */
1887 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1888     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1889 {
1890         struct ctio7_to_24xx *ctio;
1891         u16 tmp;
1892         struct abts_recv_from_24xx *entry;
1893
1894         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1895         if (ctio == NULL) {
1896                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1897                     "qla_target(%d): %s failed: unable to allocate "
1898                     "request packet\n", vha->vp_idx, __func__);
1899                 return;
1900         }
1901
1902         if (mcmd)
1903                 /* abts from remote port */
1904                 entry = &mcmd->orig_iocb.abts;
1905         else
1906                 /* abts from this driver.  */
1907                 entry = (struct abts_recv_from_24xx *)pkt;
1908
1909         /*
1910          * We've got on entrance firmware's response on by us generated
1911          * ABTS response. So, in it ID fields are reversed.
1912          */
1913
1914         ctio->entry_type = CTIO_TYPE7;
1915         ctio->entry_count = 1;
1916         ctio->nport_handle = entry->nport_handle;
1917         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1918         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1919         ctio->vp_index = vha->vp_idx;
1920         ctio->exchange_addr = entry->exchange_addr_to_abort;
1921         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1922
1923         if (mcmd) {
1924                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1925
1926                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1927                         tmp |= (mcmd->abort_io_attr << 9);
1928                 else if (qpair->retry_term_cnt & 1)
1929                         tmp |= (0x4 << 9);
1930         } else {
1931                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1932
1933                 if (qpair->retry_term_cnt & 1)
1934                         tmp |= (0x4 << 9);
1935         }
1936         ctio->u.status1.flags = cpu_to_le16(tmp);
1937         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1938
1939         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1940             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1941             le16_to_cpu(ctio->u.status1.flags),
1942             le16_to_cpu(ctio->u.status1.ox_id),
1943             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1944
1945         /* Memory Barrier */
1946         wmb();
1947         if (qpair->reqq_start_iocbs)
1948                 qpair->reqq_start_iocbs(qpair);
1949         else
1950                 qla2x00_start_iocbs(vha, qpair->req);
1951
1952         if (mcmd)
1953                 qlt_build_abts_resp_iocb(mcmd);
1954         else
1955                 qlt_24xx_send_abts_resp(qpair,
1956                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1957
1958 }
1959
1960 /* drop cmds for the given lun
1961  * XXX only looks for cmds on the port through which lun reset was recieved
1962  * XXX does not go through the list of other port (which may have cmds
1963  *     for the same lun)
1964  */
1965 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1966 {
1967         struct qla_tgt_sess_op *op;
1968         struct qla_tgt_cmd *cmd;
1969         uint32_t key;
1970         unsigned long flags;
1971
1972         key = sid_to_key(s_id);
1973         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1974         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1975                 uint32_t op_key;
1976                 u64 op_lun;
1977
1978                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1979                 op_lun = scsilun_to_int(
1980                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1981                 if (op_key == key && op_lun == lun)
1982                         op->aborted = true;
1983         }
1984
1985         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1986                 uint32_t op_key;
1987                 u64 op_lun;
1988
1989                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1990                 op_lun = scsilun_to_int(
1991                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1992                 if (op_key == key && op_lun == lun)
1993                         op->aborted = true;
1994         }
1995
1996         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1997                 uint32_t cmd_key;
1998                 u64 cmd_lun;
1999
2000                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2001                 cmd_lun = scsilun_to_int(
2002                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2003                 if (cmd_key == key && cmd_lun == lun)
2004                         cmd->aborted = 1;
2005         }
2006         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2007 }
2008
2009 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2010     uint64_t unpacked_lun)
2011 {
2012         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2013         struct qla_qpair_hint *h = NULL;
2014
2015         if (vha->flags.qpairs_available) {
2016                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2017                 if (!h)
2018                         h = &tgt->qphints[0];
2019         } else {
2020                 h = &tgt->qphints[0];
2021         }
2022
2023         return h;
2024 }
2025
2026 static void qlt_do_tmr_work(struct work_struct *work)
2027 {
2028         struct qla_tgt_mgmt_cmd *mcmd =
2029                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2030         struct qla_hw_data *ha = mcmd->vha->hw;
2031         int rc;
2032         uint32_t tag;
2033         unsigned long flags;
2034
2035         switch (mcmd->tmr_func) {
2036         case QLA_TGT_ABTS:
2037                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2038                 break;
2039         default:
2040                 tag = 0;
2041                 break;
2042         }
2043
2044         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2045             mcmd->tmr_func, tag);
2046
2047         if (rc != 0) {
2048                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2049                 switch (mcmd->tmr_func) {
2050                 case QLA_TGT_ABTS:
2051                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2052                         qlt_build_abts_resp_iocb(mcmd);
2053                         break;
2054                 case QLA_TGT_LUN_RESET:
2055                 case QLA_TGT_CLEAR_TS:
2056                 case QLA_TGT_ABORT_TS:
2057                 case QLA_TGT_CLEAR_ACA:
2058                 case QLA_TGT_TARGET_RESET:
2059                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2060                             qla_sam_status);
2061                         break;
2062
2063                 case QLA_TGT_ABORT_ALL:
2064                 case QLA_TGT_NEXUS_LOSS_SESS:
2065                 case QLA_TGT_NEXUS_LOSS:
2066                         qlt_send_notify_ack(mcmd->qpair,
2067                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2068                         break;
2069                 }
2070                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2071
2072                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2073                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2074                     mcmd->vha->vp_idx, rc);
2075                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2076         }
2077 }
2078
2079 /* ha->hardware_lock supposed to be held on entry */
2080 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2081         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2082 {
2083         struct qla_hw_data *ha = vha->hw;
2084         struct qla_tgt_mgmt_cmd *mcmd;
2085         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2086
2087         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2088             "qla_target(%d): task abort (tag=%d)\n",
2089             vha->vp_idx, abts->exchange_addr_to_abort);
2090
2091         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2092         if (mcmd == NULL) {
2093                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2094                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2095                     vha->vp_idx, __func__);
2096                 return -ENOMEM;
2097         }
2098         memset(mcmd, 0, sizeof(*mcmd));
2099         mcmd->cmd_type = TYPE_TGT_TMCMD;
2100         mcmd->sess = sess;
2101         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2102         mcmd->reset_count = ha->base_qpair->chip_reset;
2103         mcmd->tmr_func = QLA_TGT_ABTS;
2104         mcmd->qpair = h->qpair;
2105         mcmd->vha = vha;
2106
2107         /*
2108          * LUN is looked up by target-core internally based on the passed
2109          * abts->exchange_addr_to_abort tag.
2110          */
2111         mcmd->se_cmd.cpuid = h->cpuid;
2112
2113         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2114                 struct qla_tgt_cmd *abort_cmd;
2115
2116                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2117                                 le32_to_cpu(abts->exchange_addr_to_abort));
2118                 if (abort_cmd && abort_cmd->qpair) {
2119                         mcmd->qpair = abort_cmd->qpair;
2120                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2121                         mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2122                         mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2123                 }
2124         }
2125
2126         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2127         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2128
2129         return 0;
2130 }
2131
2132 /*
2133  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2134  */
2135 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2136         struct abts_recv_from_24xx *abts)
2137 {
2138         struct qla_hw_data *ha = vha->hw;
2139         struct fc_port *sess;
2140         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2141         be_id_t s_id;
2142         int rc;
2143         unsigned long flags;
2144
2145         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2146                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2147                     "qla_target(%d): ABTS: Abort Sequence not "
2148                     "supported\n", vha->vp_idx);
2149                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2150                     false);
2151                 return;
2152         }
2153
2154         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2155                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2156                     "qla_target(%d): ABTS: Unknown Exchange "
2157                     "Address received\n", vha->vp_idx);
2158                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2159                     false);
2160                 return;
2161         }
2162
2163         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2164             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2165             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2166             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2167             le32_to_cpu(abts->fcp_hdr_le.parameter));
2168
2169         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2170
2171         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2172         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2173         if (!sess) {
2174                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2175                     "qla_target(%d): task abort for non-existent session\n",
2176                     vha->vp_idx);
2177                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2178
2179                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2180                             false);
2181                 return;
2182         }
2183         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2184
2185
2186         if (sess->deleted) {
2187                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2188                     false);
2189                 return;
2190         }
2191
2192         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2193         if (rc != 0) {
2194                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2195                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2196                     vha->vp_idx, rc);
2197                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2198                     false);
2199                 return;
2200         }
2201 }
2202
2203 /*
2204  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2205  */
2206 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2207         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2208 {
2209         struct scsi_qla_host *ha = mcmd->vha;
2210         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2211         struct ctio7_to_24xx *ctio;
2212         uint16_t temp;
2213
2214         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2215             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2216             ha, atio, resp_code);
2217
2218
2219         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2220         if (ctio == NULL) {
2221                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2222                     "qla_target(%d): %s failed: unable to allocate "
2223                     "request packet\n", ha->vp_idx, __func__);
2224                 return;
2225         }
2226
2227         ctio->entry_type = CTIO_TYPE7;
2228         ctio->entry_count = 1;
2229         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2230         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2231         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2232         ctio->vp_index = ha->vp_idx;
2233         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2234         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2235         temp = (atio->u.isp24.attr << 9)|
2236                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2237         ctio->u.status1.flags = cpu_to_le16(temp);
2238         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2239         ctio->u.status1.ox_id = cpu_to_le16(temp);
2240         ctio->u.status1.scsi_status =
2241             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2242         ctio->u.status1.response_len = cpu_to_le16(8);
2243         ctio->u.status1.sense_data[0] = resp_code;
2244
2245         /* Memory Barrier */
2246         wmb();
2247         if (qpair->reqq_start_iocbs)
2248                 qpair->reqq_start_iocbs(qpair);
2249         else
2250                 qla2x00_start_iocbs(ha, qpair->req);
2251 }
2252
2253 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2254 {
2255         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2256 }
2257 EXPORT_SYMBOL(qlt_free_mcmd);
2258
2259 /*
2260  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2261  * reacquire
2262  */
2263 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2264     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2265 {
2266         struct atio_from_isp *atio = &cmd->atio;
2267         struct ctio7_to_24xx *ctio;
2268         uint16_t temp;
2269         struct scsi_qla_host *vha = cmd->vha;
2270
2271         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2272             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2273             "sense_key=%02x, asc=%02x, ascq=%02x",
2274             vha, atio, scsi_status, sense_key, asc, ascq);
2275
2276         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2277         if (!ctio) {
2278                 ql_dbg(ql_dbg_async, vha, 0x3067,
2279                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2280                     vha->host_no, __func__);
2281                 goto out;
2282         }
2283
2284         ctio->entry_type = CTIO_TYPE7;
2285         ctio->entry_count = 1;
2286         ctio->handle = QLA_TGT_SKIP_HANDLE;
2287         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2288         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2289         ctio->vp_index = vha->vp_idx;
2290         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2291         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2292         temp = (atio->u.isp24.attr << 9) |
2293             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2294         ctio->u.status1.flags = cpu_to_le16(temp);
2295         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2296         ctio->u.status1.ox_id = cpu_to_le16(temp);
2297         ctio->u.status1.scsi_status =
2298             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2299         ctio->u.status1.response_len = cpu_to_le16(18);
2300         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2301
2302         if (ctio->u.status1.residual != 0)
2303                 ctio->u.status1.scsi_status |=
2304                     cpu_to_le16(SS_RESIDUAL_UNDER);
2305
2306         /* Fixed format sense data. */
2307         ctio->u.status1.sense_data[0] = 0x70;
2308         ctio->u.status1.sense_data[2] = sense_key;
2309         /* Additional sense length */
2310         ctio->u.status1.sense_data[7] = 0xa;
2311         /* ASC and ASCQ */
2312         ctio->u.status1.sense_data[12] = asc;
2313         ctio->u.status1.sense_data[13] = ascq;
2314
2315         /* Memory Barrier */
2316         wmb();
2317
2318         if (qpair->reqq_start_iocbs)
2319                 qpair->reqq_start_iocbs(qpair);
2320         else
2321                 qla2x00_start_iocbs(vha, qpair->req);
2322
2323 out:
2324         return;
2325 }
2326
2327 /* callback from target fabric module code */
2328 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2329 {
2330         struct scsi_qla_host *vha = mcmd->sess->vha;
2331         struct qla_hw_data *ha = vha->hw;
2332         unsigned long flags;
2333         struct qla_qpair *qpair = mcmd->qpair;
2334         bool free_mcmd = true;
2335
2336         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2337             "TM response mcmd (%p) status %#x state %#x",
2338             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2339
2340         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2341
2342         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2343                 /*
2344                  * Either the port is not online or this request was from
2345                  * previous life, just abort the processing.
2346                  */
2347                 ql_dbg(ql_dbg_async, vha, 0xe100,
2348                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2349                         vha->flags.online, qla2x00_reset_active(vha),
2350                         mcmd->reset_count, qpair->chip_reset);
2351                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2352                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2353                 return;
2354         }
2355
2356         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2357                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2358                 case ELS_LOGO:
2359                 case ELS_PRLO:
2360                 case ELS_TPRLO:
2361                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2362                             "TM response logo %8phC status %#x state %#x",
2363                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2364                             mcmd->flags);
2365                         qlt_schedule_sess_for_deletion(mcmd->sess);
2366                         break;
2367                 default:
2368                         qlt_send_notify_ack(vha->hw->base_qpair,
2369                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2370                         break;
2371                 }
2372         } else {
2373                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2374                         qlt_build_abts_resp_iocb(mcmd);
2375                         free_mcmd = false;
2376                 } else
2377                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2378                             mcmd->fc_tm_rsp);
2379         }
2380         /*
2381          * Make the callback for ->free_mcmd() to queue_work() and invoke
2382          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2383          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2384          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2385          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2386          * qlt_xmit_tm_rsp() returns here..
2387          */
2388         if (free_mcmd)
2389                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2390
2391         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2392 }
2393 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2394
2395 /* No locks */
2396 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2397 {
2398         struct qla_tgt_cmd *cmd = prm->cmd;
2399
2400         BUG_ON(cmd->sg_cnt == 0);
2401
2402         prm->sg = (struct scatterlist *)cmd->sg;
2403         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2404             cmd->sg_cnt, cmd->dma_data_direction);
2405         if (unlikely(prm->seg_cnt == 0))
2406                 goto out_err;
2407
2408         prm->cmd->sg_mapped = 1;
2409
2410         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2411                 /*
2412                  * If greater than four sg entries then we need to allocate
2413                  * the continuation entries
2414                  */
2415                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2416                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2417                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2418                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2419         } else {
2420                 /* DIF */
2421                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2422                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2423                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2424                         prm->tot_dsds = prm->seg_cnt;
2425                 } else
2426                         prm->tot_dsds = prm->seg_cnt;
2427
2428                 if (cmd->prot_sg_cnt) {
2429                         prm->prot_sg      = cmd->prot_sg;
2430                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2431                                 cmd->prot_sg, cmd->prot_sg_cnt,
2432                                 cmd->dma_data_direction);
2433                         if (unlikely(prm->prot_seg_cnt == 0))
2434                                 goto out_err;
2435
2436                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2437                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2438                                 /* Dif Bundling not support here */
2439                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2440                                                                 cmd->blk_sz);
2441                                 prm->tot_dsds += prm->prot_seg_cnt;
2442                         } else
2443                                 prm->tot_dsds += prm->prot_seg_cnt;
2444                 }
2445         }
2446
2447         return 0;
2448
2449 out_err:
2450         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2451             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2452             0, prm->cmd->sg_cnt);
2453         return -1;
2454 }
2455
2456 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2457 {
2458         struct qla_hw_data *ha;
2459         struct qla_qpair *qpair;
2460
2461         if (!cmd->sg_mapped)
2462                 return;
2463
2464         qpair = cmd->qpair;
2465
2466         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2467             cmd->dma_data_direction);
2468         cmd->sg_mapped = 0;
2469
2470         if (cmd->prot_sg_cnt)
2471                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2472                         cmd->dma_data_direction);
2473
2474         if (!cmd->ctx)
2475                 return;
2476         ha = vha->hw;
2477         if (cmd->ctx_dsd_alloced)
2478                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2479
2480         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2481 }
2482
2483 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2484         uint32_t req_cnt)
2485 {
2486         uint32_t cnt;
2487         struct req_que *req = qpair->req;
2488
2489         if (req->cnt < (req_cnt + 2)) {
2490                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2491                     rd_reg_dword_relaxed(req->req_q_out));
2492
2493                 if  (req->ring_index < cnt)
2494                         req->cnt = cnt - req->ring_index;
2495                 else
2496                         req->cnt = req->length - (req->ring_index - cnt);
2497
2498                 if (unlikely(req->cnt < (req_cnt + 2)))
2499                         return -EAGAIN;
2500         }
2501
2502         req->cnt -= req_cnt;
2503
2504         return 0;
2505 }
2506
2507 /*
2508  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2509  */
2510 static inline void *qlt_get_req_pkt(struct req_que *req)
2511 {
2512         /* Adjust ring index. */
2513         req->ring_index++;
2514         if (req->ring_index == req->length) {
2515                 req->ring_index = 0;
2516                 req->ring_ptr = req->ring;
2517         } else {
2518                 req->ring_ptr++;
2519         }
2520         return (cont_entry_t *)req->ring_ptr;
2521 }
2522
2523 /* ha->hardware_lock supposed to be held on entry */
2524 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2525 {
2526         uint32_t h;
2527         int index;
2528         uint8_t found = 0;
2529         struct req_que *req = qpair->req;
2530
2531         h = req->current_outstanding_cmd;
2532
2533         for (index = 1; index < req->num_outstanding_cmds; index++) {
2534                 h++;
2535                 if (h == req->num_outstanding_cmds)
2536                         h = 1;
2537
2538                 if (h == QLA_TGT_SKIP_HANDLE)
2539                         continue;
2540
2541                 if (!req->outstanding_cmds[h]) {
2542                         found = 1;
2543                         break;
2544                 }
2545         }
2546
2547         if (found) {
2548                 req->current_outstanding_cmd = h;
2549         } else {
2550                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2551                     "qla_target(%d): Ran out of empty cmd slots\n",
2552                     qpair->vha->vp_idx);
2553                 h = QLA_TGT_NULL_HANDLE;
2554         }
2555
2556         return h;
2557 }
2558
2559 /* ha->hardware_lock supposed to be held on entry */
2560 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2561         struct qla_tgt_prm *prm)
2562 {
2563         uint32_t h;
2564         struct ctio7_to_24xx *pkt;
2565         struct atio_from_isp *atio = &prm->cmd->atio;
2566         uint16_t temp;
2567
2568         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2569         prm->pkt = pkt;
2570         memset(pkt, 0, sizeof(*pkt));
2571
2572         pkt->entry_type = CTIO_TYPE7;
2573         pkt->entry_count = (uint8_t)prm->req_cnt;
2574         pkt->vp_index = prm->cmd->vp_idx;
2575
2576         h = qlt_make_handle(qpair);
2577         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2578                 /*
2579                  * CTIO type 7 from the firmware doesn't provide a way to
2580                  * know the initiator's LOOP ID, hence we can't find
2581                  * the session and, so, the command.
2582                  */
2583                 return -EAGAIN;
2584         } else
2585                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2586
2587         pkt->handle = make_handle(qpair->req->id, h);
2588         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2589         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2590         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2591         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2592         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2593         temp = atio->u.isp24.attr << 9;
2594         pkt->u.status0.flags |= cpu_to_le16(temp);
2595         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2596         pkt->u.status0.ox_id = cpu_to_le16(temp);
2597         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2598
2599         return 0;
2600 }
2601
2602 /*
2603  * ha->hardware_lock supposed to be held on entry. We have already made sure
2604  * that there is sufficient amount of request entries to not drop it.
2605  */
2606 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2607 {
2608         int cnt;
2609         struct dsd64 *cur_dsd;
2610
2611         /* Build continuation packets */
2612         while (prm->seg_cnt > 0) {
2613                 cont_a64_entry_t *cont_pkt64 =
2614                         (cont_a64_entry_t *)qlt_get_req_pkt(
2615                            prm->cmd->qpair->req);
2616
2617                 /*
2618                  * Make sure that from cont_pkt64 none of
2619                  * 64-bit specific fields used for 32-bit
2620                  * addressing. Cast to (cont_entry_t *) for
2621                  * that.
2622                  */
2623
2624                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2625
2626                 cont_pkt64->entry_count = 1;
2627                 cont_pkt64->sys_define = 0;
2628
2629                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2630                 cur_dsd = cont_pkt64->dsd;
2631
2632                 /* Load continuation entry data segments */
2633                 for (cnt = 0;
2634                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2635                     cnt++, prm->seg_cnt--) {
2636                         append_dsd64(&cur_dsd, prm->sg);
2637                         prm->sg = sg_next(prm->sg);
2638                 }
2639         }
2640 }
2641
2642 /*
2643  * ha->hardware_lock supposed to be held on entry. We have already made sure
2644  * that there is sufficient amount of request entries to not drop it.
2645  */
2646 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2647 {
2648         int cnt;
2649         struct dsd64 *cur_dsd;
2650         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2651
2652         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2653
2654         /* Setup packet address segment pointer */
2655         cur_dsd = &pkt24->u.status0.dsd;
2656
2657         /* Set total data segment count */
2658         if (prm->seg_cnt)
2659                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2660
2661         if (prm->seg_cnt == 0) {
2662                 /* No data transfer */
2663                 cur_dsd->address = 0;
2664                 cur_dsd->length = 0;
2665                 return;
2666         }
2667
2668         /* If scatter gather */
2669
2670         /* Load command entry data segments */
2671         for (cnt = 0;
2672             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2673             cnt++, prm->seg_cnt--) {
2674                 append_dsd64(&cur_dsd, prm->sg);
2675                 prm->sg = sg_next(prm->sg);
2676         }
2677
2678         qlt_load_cont_data_segments(prm);
2679 }
2680
2681 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2682 {
2683         return cmd->bufflen > 0;
2684 }
2685
2686 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2687 {
2688         struct qla_tgt_cmd *cmd;
2689         struct scsi_qla_host *vha;
2690
2691         /* asc 0x10=dif error */
2692         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2693                 cmd = prm->cmd;
2694                 vha = cmd->vha;
2695                 /* ASCQ */
2696                 switch (prm->sense_buffer[13]) {
2697                 case 1:
2698                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2699                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2700                             "se_cmd=%p tag[%x]",
2701                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2702                             cmd->atio.u.isp24.exchange_addr);
2703                         break;
2704                 case 2:
2705                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2706                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2707                             "se_cmd=%p tag[%x]",
2708                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2709                             cmd->atio.u.isp24.exchange_addr);
2710                         break;
2711                 case 3:
2712                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2713                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2714                             "se_cmd=%p tag[%x]",
2715                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2716                             cmd->atio.u.isp24.exchange_addr);
2717                         break;
2718                 default:
2719                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2720                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2721                             "se_cmd=%p tag[%x]",
2722                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2723                             cmd->atio.u.isp24.exchange_addr);
2724                         break;
2725                 }
2726                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2727         }
2728 }
2729
2730 /*
2731  * Called without ha->hardware_lock held
2732  */
2733 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2734         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2735         uint32_t *full_req_cnt)
2736 {
2737         struct se_cmd *se_cmd = &cmd->se_cmd;
2738         struct qla_qpair *qpair = cmd->qpair;
2739
2740         prm->cmd = cmd;
2741         prm->tgt = cmd->tgt;
2742         prm->pkt = NULL;
2743         prm->rq_result = scsi_status;
2744         prm->sense_buffer = &cmd->sense_buffer[0];
2745         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2746         prm->sg = NULL;
2747         prm->seg_cnt = -1;
2748         prm->req_cnt = 1;
2749         prm->residual = 0;
2750         prm->add_status_pkt = 0;
2751         prm->prot_sg = NULL;
2752         prm->prot_seg_cnt = 0;
2753         prm->tot_dsds = 0;
2754
2755         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2756                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2757                         return -EAGAIN;
2758         }
2759
2760         *full_req_cnt = prm->req_cnt;
2761
2762         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2763                 prm->residual = se_cmd->residual_count;
2764                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2765                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2766                        prm->residual, se_cmd->tag,
2767                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2768                        cmd->bufflen, prm->rq_result);
2769                 prm->rq_result |= SS_RESIDUAL_UNDER;
2770         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2771                 prm->residual = se_cmd->residual_count;
2772                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2773                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2774                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2775                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2776                 prm->rq_result |= SS_RESIDUAL_OVER;
2777         }
2778
2779         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2780                 /*
2781                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2782                  * ignored in *xmit_response() below
2783                  */
2784                 if (qlt_has_data(cmd)) {
2785                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2786                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2787                             (prm->rq_result != 0))) {
2788                                 prm->add_status_pkt = 1;
2789                                 (*full_req_cnt)++;
2790                         }
2791                 }
2792         }
2793
2794         return 0;
2795 }
2796
2797 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2798     int sending_sense)
2799 {
2800         if (cmd->qpair->enable_class_2)
2801                 return 0;
2802
2803         if (sending_sense)
2804                 return cmd->conf_compl_supported;
2805         else
2806                 return cmd->qpair->enable_explicit_conf &&
2807                     cmd->conf_compl_supported;
2808 }
2809
2810 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2811         struct qla_tgt_prm *prm)
2812 {
2813         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2814             (uint32_t)sizeof(ctio->u.status1.sense_data));
2815         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2816         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2817                 ctio->u.status0.flags |= cpu_to_le16(
2818                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2819                     CTIO7_FLAGS_CONFORM_REQ);
2820         }
2821         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2822         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2823         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2824                 int i;
2825
2826                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2827                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2828                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2829                                     "Skipping EXPLICIT_CONFORM and "
2830                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2831                                     "non GOOD status\n");
2832                                 goto skip_explict_conf;
2833                         }
2834                         ctio->u.status1.flags |= cpu_to_le16(
2835                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2836                             CTIO7_FLAGS_CONFORM_REQ);
2837                 }
2838 skip_explict_conf:
2839                 ctio->u.status1.flags &=
2840                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2841                 ctio->u.status1.flags |=
2842                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2843                 ctio->u.status1.scsi_status |=
2844                     cpu_to_le16(SS_SENSE_LEN_VALID);
2845                 ctio->u.status1.sense_length =
2846                     cpu_to_le16(prm->sense_buffer_len);
2847                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2848                         uint32_t v;
2849
2850                         v = get_unaligned_be32(
2851                                         &((uint32_t *)prm->sense_buffer)[i]);
2852                         put_unaligned_le32(v,
2853                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2854                 }
2855                 qlt_print_dif_err(prm);
2856
2857         } else {
2858                 ctio->u.status1.flags &=
2859                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2860                 ctio->u.status1.flags |=
2861                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2862                 ctio->u.status1.sense_length = 0;
2863                 memset(ctio->u.status1.sense_data, 0,
2864                     sizeof(ctio->u.status1.sense_data));
2865         }
2866
2867         /* Sense with len > 24, is it possible ??? */
2868 }
2869
2870 static inline int
2871 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2872 {
2873         switch (se_cmd->prot_op) {
2874         case TARGET_PROT_DOUT_INSERT:
2875         case TARGET_PROT_DIN_STRIP:
2876                 if (ql2xenablehba_err_chk >= 1)
2877                         return 1;
2878                 break;
2879         case TARGET_PROT_DOUT_PASS:
2880         case TARGET_PROT_DIN_PASS:
2881                 if (ql2xenablehba_err_chk >= 2)
2882                         return 1;
2883                 break;
2884         case TARGET_PROT_DIN_INSERT:
2885         case TARGET_PROT_DOUT_STRIP:
2886                 return 1;
2887         default:
2888                 break;
2889         }
2890         return 0;
2891 }
2892
2893 static inline int
2894 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2895 {
2896         switch (se_cmd->prot_op) {
2897         case TARGET_PROT_DIN_INSERT:
2898         case TARGET_PROT_DOUT_INSERT:
2899         case TARGET_PROT_DIN_STRIP:
2900         case TARGET_PROT_DOUT_STRIP:
2901         case TARGET_PROT_DIN_PASS:
2902         case TARGET_PROT_DOUT_PASS:
2903             return 1;
2904         default:
2905             return 0;
2906         }
2907         return 0;
2908 }
2909
2910 /*
2911  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2912  */
2913 static void
2914 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2915     uint16_t *pfw_prot_opts)
2916 {
2917         struct se_cmd *se_cmd = &cmd->se_cmd;
2918         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2919         scsi_qla_host_t *vha = cmd->tgt->vha;
2920         struct qla_hw_data *ha = vha->hw;
2921         uint32_t t32 = 0;
2922
2923         /*
2924          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2925          * have been immplemented by TCM, before AppTag is avail.
2926          * Look for modesense_handlers[]
2927          */
2928         ctx->app_tag = 0;
2929         ctx->app_tag_mask[0] = 0x0;
2930         ctx->app_tag_mask[1] = 0x0;
2931
2932         if (IS_PI_UNINIT_CAPABLE(ha)) {
2933                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2934                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2935                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2936                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2937                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2938         }
2939
2940         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2941
2942         switch (se_cmd->prot_type) {
2943         case TARGET_DIF_TYPE0_PROT:
2944                 /*
2945                  * No check for ql2xenablehba_err_chk, as it
2946                  * would be an I/O error if hba tag generation
2947                  * is not done.
2948                  */
2949                 ctx->ref_tag = cpu_to_le32(lba);
2950                 /* enable ALL bytes of the ref tag */
2951                 ctx->ref_tag_mask[0] = 0xff;
2952                 ctx->ref_tag_mask[1] = 0xff;
2953                 ctx->ref_tag_mask[2] = 0xff;
2954                 ctx->ref_tag_mask[3] = 0xff;
2955                 break;
2956         case TARGET_DIF_TYPE1_PROT:
2957             /*
2958              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2959              * REF tag, and 16 bit app tag.
2960              */
2961             ctx->ref_tag = cpu_to_le32(lba);
2962             if (!qla_tgt_ref_mask_check(se_cmd) ||
2963                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2964                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2965                     break;
2966             }
2967             /* enable ALL bytes of the ref tag */
2968             ctx->ref_tag_mask[0] = 0xff;
2969             ctx->ref_tag_mask[1] = 0xff;
2970             ctx->ref_tag_mask[2] = 0xff;
2971             ctx->ref_tag_mask[3] = 0xff;
2972             break;
2973         case TARGET_DIF_TYPE2_PROT:
2974             /*
2975              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2976              * tag has to match LBA in CDB + N
2977              */
2978             ctx->ref_tag = cpu_to_le32(lba);
2979             if (!qla_tgt_ref_mask_check(se_cmd) ||
2980                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2981                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2982                     break;
2983             }
2984             /* enable ALL bytes of the ref tag */
2985             ctx->ref_tag_mask[0] = 0xff;
2986             ctx->ref_tag_mask[1] = 0xff;
2987             ctx->ref_tag_mask[2] = 0xff;
2988             ctx->ref_tag_mask[3] = 0xff;
2989             break;
2990         case TARGET_DIF_TYPE3_PROT:
2991             /* For TYPE 3 protection: 16 bit GUARD only */
2992             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2993             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2994                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2995             break;
2996         }
2997 }
2998
2999 static inline int
3000 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3001 {
3002         struct dsd64            *cur_dsd;
3003         uint32_t                transfer_length = 0;
3004         uint32_t                data_bytes;
3005         uint32_t                dif_bytes;
3006         uint8_t                 bundling = 1;
3007         struct crc_context      *crc_ctx_pkt = NULL;
3008         struct qla_hw_data      *ha;
3009         struct ctio_crc2_to_fw  *pkt;
3010         dma_addr_t              crc_ctx_dma;
3011         uint16_t                fw_prot_opts = 0;
3012         struct qla_tgt_cmd      *cmd = prm->cmd;
3013         struct se_cmd           *se_cmd = &cmd->se_cmd;
3014         uint32_t h;
3015         struct atio_from_isp *atio = &prm->cmd->atio;
3016         struct qla_tc_param     tc;
3017         uint16_t t16;
3018         scsi_qla_host_t *vha = cmd->vha;
3019
3020         ha = vha->hw;
3021
3022         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3023         prm->pkt = pkt;
3024         memset(pkt, 0, sizeof(*pkt));
3025
3026         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3027                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3028                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3029                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3030
3031         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3032             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3033                 bundling = 0;
3034
3035         /* Compute dif len and adjust data len to incude protection */
3036         data_bytes = cmd->bufflen;
3037         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3038
3039         switch (se_cmd->prot_op) {
3040         case TARGET_PROT_DIN_INSERT:
3041         case TARGET_PROT_DOUT_STRIP:
3042                 transfer_length = data_bytes;
3043                 if (cmd->prot_sg_cnt)
3044                         data_bytes += dif_bytes;
3045                 break;
3046         case TARGET_PROT_DIN_STRIP:
3047         case TARGET_PROT_DOUT_INSERT:
3048         case TARGET_PROT_DIN_PASS:
3049         case TARGET_PROT_DOUT_PASS:
3050                 transfer_length = data_bytes + dif_bytes;
3051                 break;
3052         default:
3053                 BUG();
3054                 break;
3055         }
3056
3057         if (!qlt_hba_err_chk_enabled(se_cmd))
3058                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3059         /* HBA error checking enabled */
3060         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3061                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3062                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3063                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3064                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3065                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3066         }
3067
3068         switch (se_cmd->prot_op) {
3069         case TARGET_PROT_DIN_INSERT:
3070         case TARGET_PROT_DOUT_INSERT:
3071                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3072                 break;
3073         case TARGET_PROT_DIN_STRIP:
3074         case TARGET_PROT_DOUT_STRIP:
3075                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3076                 break;
3077         case TARGET_PROT_DIN_PASS:
3078         case TARGET_PROT_DOUT_PASS:
3079                 fw_prot_opts |= PO_MODE_DIF_PASS;
3080                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3081                 break;
3082         default:/* Normal Request */
3083                 fw_prot_opts |= PO_MODE_DIF_PASS;
3084                 break;
3085         }
3086
3087         /* ---- PKT ---- */
3088         /* Update entry type to indicate Command Type CRC_2 IOCB */
3089         pkt->entry_type  = CTIO_CRC2;
3090         pkt->entry_count = 1;
3091         pkt->vp_index = cmd->vp_idx;
3092
3093         h = qlt_make_handle(qpair);
3094         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3095                 /*
3096                  * CTIO type 7 from the firmware doesn't provide a way to
3097                  * know the initiator's LOOP ID, hence we can't find
3098                  * the session and, so, the command.
3099                  */
3100                 return -EAGAIN;
3101         } else
3102                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3103
3104         pkt->handle  = make_handle(qpair->req->id, h);
3105         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3106         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3107         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3108         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3109         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3110
3111         /* silence compile warning */
3112         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3113         pkt->ox_id  = cpu_to_le16(t16);
3114
3115         t16 = (atio->u.isp24.attr << 9);
3116         pkt->flags |= cpu_to_le16(t16);
3117         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3118
3119         /* Set transfer direction */
3120         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3121                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3122         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3123                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3124
3125         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3126         /* Fibre channel byte count */
3127         pkt->transfer_length = cpu_to_le32(transfer_length);
3128
3129         /* ----- CRC context -------- */
3130
3131         /* Allocate CRC context from global pool */
3132         crc_ctx_pkt = cmd->ctx =
3133             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3134
3135         if (!crc_ctx_pkt)
3136                 goto crc_queuing_error;
3137
3138         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3139         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3140
3141         /* Set handle */
3142         crc_ctx_pkt->handle = pkt->handle;
3143
3144         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3145
3146         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3147         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3148
3149         if (!bundling) {
3150                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3151         } else {
3152                 /*
3153                  * Configure Bundling if we need to fetch interlaving
3154                  * protection PCI accesses
3155                  */
3156                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3157                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3158                 crc_ctx_pkt->u.bundling.dseg_count =
3159                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3160                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3161         }
3162
3163         /* Finish the common fields of CRC pkt */
3164         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3165         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3166         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3167         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3168
3169         memset((uint8_t *)&tc, 0 , sizeof(tc));
3170         tc.vha = vha;
3171         tc.blk_sz = cmd->blk_sz;
3172         tc.bufflen = cmd->bufflen;
3173         tc.sg = cmd->sg;
3174         tc.prot_sg = cmd->prot_sg;
3175         tc.ctx = crc_ctx_pkt;
3176         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3177
3178         /* Walks data segments */
3179         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3180
3181         if (!bundling && prm->prot_seg_cnt) {
3182                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3183                         prm->tot_dsds, &tc))
3184                         goto crc_queuing_error;
3185         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3186                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3187                 goto crc_queuing_error;
3188
3189         if (bundling && prm->prot_seg_cnt) {
3190                 /* Walks dif segments */
3191                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3192
3193                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3194                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3195                         prm->prot_seg_cnt, cmd))
3196                         goto crc_queuing_error;
3197         }
3198         return QLA_SUCCESS;
3199
3200 crc_queuing_error:
3201         /* Cleanup will be performed by the caller */
3202         qpair->req->outstanding_cmds[h] = NULL;
3203
3204         return QLA_FUNCTION_FAILED;
3205 }
3206
3207 /*
3208  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3209  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3210  */
3211 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3212         uint8_t scsi_status)
3213 {
3214         struct scsi_qla_host *vha = cmd->vha;
3215         struct qla_qpair *qpair = cmd->qpair;
3216         struct ctio7_to_24xx *pkt;
3217         struct qla_tgt_prm prm;
3218         uint32_t full_req_cnt = 0;
3219         unsigned long flags = 0;
3220         int res;
3221
3222         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3223             (cmd->sess && cmd->sess->deleted)) {
3224                 cmd->state = QLA_TGT_STATE_PROCESSED;
3225                 res = 0;
3226                 goto free;
3227         }
3228
3229         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3230             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3231             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3232             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3233             &cmd->se_cmd, qpair->id);
3234
3235         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3236             &full_req_cnt);
3237         if (unlikely(res != 0))
3238                 goto free;
3239
3240         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3241
3242         if (xmit_type == QLA_TGT_XMIT_STATUS)
3243                 qpair->tgt_counters.core_qla_snd_status++;
3244         else
3245                 qpair->tgt_counters.core_qla_que_buf++;
3246
3247         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3248                 /*
3249                  * Either the port is not online or this request was from
3250                  * previous life, just abort the processing.
3251                  */
3252                 cmd->state = QLA_TGT_STATE_PROCESSED;
3253                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3254                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3255                         vha->flags.online, qla2x00_reset_active(vha),
3256                         cmd->reset_count, qpair->chip_reset);
3257                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3258                 res = 0;
3259                 goto free;
3260         }
3261
3262         /* Does F/W have an IOCBs for this request */
3263         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3264         if (unlikely(res))
3265                 goto out_unmap_unlock;
3266
3267         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3268                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3269         else
3270                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3271         if (unlikely(res != 0)) {
3272                 qpair->req->cnt += full_req_cnt;
3273                 goto out_unmap_unlock;
3274         }
3275
3276         pkt = (struct ctio7_to_24xx *)prm.pkt;
3277
3278         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3279                 pkt->u.status0.flags |=
3280                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3281                         CTIO7_FLAGS_STATUS_MODE_0);
3282
3283                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3284                         qlt_load_data_segments(&prm);
3285
3286                 if (prm.add_status_pkt == 0) {
3287                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3288                                 pkt->u.status0.scsi_status =
3289                                     cpu_to_le16(prm.rq_result);
3290                                 pkt->u.status0.residual =
3291                                     cpu_to_le32(prm.residual);
3292                                 pkt->u.status0.flags |= cpu_to_le16(
3293                                     CTIO7_FLAGS_SEND_STATUS);
3294                                 if (qlt_need_explicit_conf(cmd, 0)) {
3295                                         pkt->u.status0.flags |=
3296                                             cpu_to_le16(
3297                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3298                                                 CTIO7_FLAGS_CONFORM_REQ);
3299                                 }
3300                         }
3301
3302                 } else {
3303                         /*
3304                          * We have already made sure that there is sufficient
3305                          * amount of request entries to not drop HW lock in
3306                          * req_pkt().
3307                          */
3308                         struct ctio7_to_24xx *ctio =
3309                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3310                                     qpair->req);
3311
3312                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3313                             "Building additional status packet 0x%p.\n",
3314                             ctio);
3315
3316                         /*
3317                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3318                          * ctio7_to_24xx
3319                          */
3320                         memcpy(ctio, pkt, sizeof(*ctio));
3321                         /* reset back to CTIO7 */
3322                         ctio->entry_count = 1;
3323                         ctio->entry_type = CTIO_TYPE7;
3324                         ctio->dseg_count = 0;
3325                         ctio->u.status1.flags &= ~cpu_to_le16(
3326                             CTIO7_FLAGS_DATA_IN);
3327
3328                         /* Real finish is ctio_m1's finish */
3329                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3330                         pkt->u.status0.flags |= cpu_to_le16(
3331                             CTIO7_FLAGS_DONT_RET_CTIO);
3332
3333                         /* qlt_24xx_init_ctio_to_isp will correct
3334                          * all neccessary fields that's part of CTIO7.
3335                          * There should be no residual of CTIO-CRC2 data.
3336                          */
3337                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3338                             &prm);
3339                 }
3340         } else
3341                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3342
3343
3344         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3345         cmd->cmd_sent_to_fw = 1;
3346         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3347
3348         /* Memory Barrier */
3349         wmb();
3350         if (qpair->reqq_start_iocbs)
3351                 qpair->reqq_start_iocbs(qpair);
3352         else
3353                 qla2x00_start_iocbs(vha, qpair->req);
3354         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3355
3356         return 0;
3357
3358 out_unmap_unlock:
3359         qlt_unmap_sg(vha, cmd);
3360         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3361
3362 free:
3363         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3364         return res;
3365 }
3366 EXPORT_SYMBOL(qlt_xmit_response);
3367
3368 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3369 {
3370         struct ctio7_to_24xx *pkt;
3371         struct scsi_qla_host *vha = cmd->vha;
3372         struct qla_tgt *tgt = cmd->tgt;
3373         struct qla_tgt_prm prm;
3374         unsigned long flags = 0;
3375         int res = 0;
3376         struct qla_qpair *qpair = cmd->qpair;
3377
3378         memset(&prm, 0, sizeof(prm));
3379         prm.cmd = cmd;
3380         prm.tgt = tgt;
3381         prm.sg = NULL;
3382         prm.req_cnt = 1;
3383
3384         /* Calculate number of entries and segments required */
3385         if (qlt_pci_map_calc_cnt(&prm) != 0)
3386                 return -EAGAIN;
3387
3388         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3389             (cmd->sess && cmd->sess->deleted)) {
3390                 /*
3391                  * Either the port is not online or this request was from
3392                  * previous life, just abort the processing.
3393                  */
3394                 cmd->aborted = 1;
3395                 cmd->write_data_transferred = 0;
3396                 cmd->state = QLA_TGT_STATE_DATA_IN;
3397                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3398                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3399                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3400                         vha->flags.online, qla2x00_reset_active(vha),
3401                         cmd->reset_count, qpair->chip_reset);
3402                 return 0;
3403         }
3404
3405         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3406         /* Does F/W have an IOCBs for this request */
3407         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3408         if (res != 0)
3409                 goto out_unlock_free_unmap;
3410         if (cmd->se_cmd.prot_op)
3411                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3412         else
3413                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3414
3415         if (unlikely(res != 0)) {
3416                 qpair->req->cnt += prm.req_cnt;
3417                 goto out_unlock_free_unmap;
3418         }
3419
3420         pkt = (struct ctio7_to_24xx *)prm.pkt;
3421         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3422             CTIO7_FLAGS_STATUS_MODE_0);
3423
3424         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3425                 qlt_load_data_segments(&prm);
3426
3427         cmd->state = QLA_TGT_STATE_NEED_DATA;
3428         cmd->cmd_sent_to_fw = 1;
3429         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3430
3431         /* Memory Barrier */
3432         wmb();
3433         if (qpair->reqq_start_iocbs)
3434                 qpair->reqq_start_iocbs(qpair);
3435         else
3436                 qla2x00_start_iocbs(vha, qpair->req);
3437         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3438
3439         return res;
3440
3441 out_unlock_free_unmap:
3442         qlt_unmap_sg(vha, cmd);
3443         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3444
3445         return res;
3446 }
3447 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3448
3449
3450 /*
3451  * it is assumed either hardware_lock or qpair lock is held.
3452  */
3453 static void
3454 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3455         struct ctio_crc_from_fw *sts)
3456 {
3457         uint8_t         *ap = &sts->actual_dif[0];
3458         uint8_t         *ep = &sts->expected_dif[0];
3459         uint64_t        lba = cmd->se_cmd.t_task_lba;
3460         uint8_t scsi_status, sense_key, asc, ascq;
3461         unsigned long flags;
3462         struct scsi_qla_host *vha = cmd->vha;
3463
3464         cmd->trc_flags |= TRC_DIF_ERR;
3465
3466         cmd->a_guard   = get_unaligned_be16(ap + 0);
3467         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3468         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3469
3470         cmd->e_guard   = get_unaligned_be16(ep + 0);
3471         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3472         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3473
3474         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3475             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3476
3477         scsi_status = sense_key = asc = ascq = 0;
3478
3479         /* check appl tag */
3480         if (cmd->e_app_tag != cmd->a_app_tag) {
3481                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3482                     "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]",
3483                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3484                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3485                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3486                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3487
3488                 cmd->dif_err_code = DIF_ERR_APP;
3489                 scsi_status = SAM_STAT_CHECK_CONDITION;
3490                 sense_key = ABORTED_COMMAND;
3491                 asc = 0x10;
3492                 ascq = 0x2;
3493         }
3494
3495         /* check ref tag */
3496         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3497                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3498                     "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] ",
3499                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3500                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3501                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3502                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3503
3504                 cmd->dif_err_code = DIF_ERR_REF;
3505                 scsi_status = SAM_STAT_CHECK_CONDITION;
3506                 sense_key = ABORTED_COMMAND;
3507                 asc = 0x10;
3508                 ascq = 0x3;
3509                 goto out;
3510         }
3511
3512         /* check guard */
3513         if (cmd->e_guard != cmd->a_guard) {
3514                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3515                     "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]",
3516                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3517                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3518                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3519                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3520
3521                 cmd->dif_err_code = DIF_ERR_GRD;
3522                 scsi_status = SAM_STAT_CHECK_CONDITION;
3523                 sense_key = ABORTED_COMMAND;
3524                 asc = 0x10;
3525                 ascq = 0x1;
3526         }
3527 out:
3528         switch (cmd->state) {
3529         case QLA_TGT_STATE_NEED_DATA:
3530                 /* handle_data will load DIF error code  */
3531                 cmd->state = QLA_TGT_STATE_DATA_IN;
3532                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3533                 break;
3534         default:
3535                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3536                 if (cmd->aborted) {
3537                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3538                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3539                         break;
3540                 }
3541                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3542
3543                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3544                     ascq);
3545                 /* assume scsi status gets out on the wire.
3546                  * Will not wait for completion.
3547                  */
3548                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3549                 break;
3550         }
3551 }
3552
3553 /* If hardware_lock held on entry, might drop it, then reaquire */
3554 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3555 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3556         struct imm_ntfy_from_isp *ntfy)
3557 {
3558         struct nack_to_isp *nack;
3559         struct qla_hw_data *ha = vha->hw;
3560         request_t *pkt;
3561         int ret = 0;
3562
3563         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3564             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3565
3566         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3567         if (pkt == NULL) {
3568                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3569                     "qla_target(%d): %s failed: unable to allocate "
3570                     "request packet\n", vha->vp_idx, __func__);
3571                 return -ENOMEM;
3572         }
3573
3574         pkt->entry_type = NOTIFY_ACK_TYPE;
3575         pkt->entry_count = 1;
3576         pkt->handle = QLA_TGT_SKIP_HANDLE;
3577
3578         nack = (struct nack_to_isp *)pkt;
3579         nack->ox_id = ntfy->ox_id;
3580
3581         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3582         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3583                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3584                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3585         }
3586
3587         /* terminate */
3588         nack->u.isp24.flags |=
3589                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3590
3591         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3592         nack->u.isp24.status = ntfy->u.isp24.status;
3593         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3594         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3595         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3596         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3597         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3598         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3599
3600         qla2x00_start_iocbs(vha, vha->req);
3601         return ret;
3602 }
3603
3604 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3605         struct imm_ntfy_from_isp *imm, int ha_locked)
3606 {
3607         int rc;
3608
3609         WARN_ON_ONCE(!ha_locked);
3610         rc = __qlt_send_term_imm_notif(vha, imm);
3611         pr_debug("rc = %d\n", rc);
3612 }
3613
3614 /*
3615  * If hardware_lock held on entry, might drop it, then reaquire
3616  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3617  */
3618 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3619         struct qla_tgt_cmd *cmd,
3620         struct atio_from_isp *atio)
3621 {
3622         struct scsi_qla_host *vha = qpair->vha;
3623         struct ctio7_to_24xx *ctio24;
3624         struct qla_hw_data *ha = vha->hw;
3625         request_t *pkt;
3626         int ret = 0;
3627         uint16_t temp;
3628
3629         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3630
3631         if (cmd)
3632                 vha = cmd->vha;
3633
3634         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3635         if (pkt == NULL) {
3636                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3637                     "qla_target(%d): %s failed: unable to allocate "
3638                     "request packet\n", vha->vp_idx, __func__);
3639                 return -ENOMEM;
3640         }
3641
3642         if (cmd != NULL) {
3643                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3644                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3645                             "qla_target(%d): Terminating cmd %p with "
3646                             "incorrect state %d\n", vha->vp_idx, cmd,
3647                             cmd->state);
3648                 } else
3649                         ret = 1;
3650         }
3651
3652         qpair->tgt_counters.num_term_xchg_sent++;
3653         pkt->entry_count = 1;
3654         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3655
3656         ctio24 = (struct ctio7_to_24xx *)pkt;
3657         ctio24->entry_type = CTIO_TYPE7;
3658         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3659         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3660         ctio24->vp_index = vha->vp_idx;
3661         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3662         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3663         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3664                 CTIO7_FLAGS_TERMINATE;
3665         ctio24->u.status1.flags = cpu_to_le16(temp);
3666         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3667         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3668
3669         /* Memory Barrier */
3670         wmb();
3671         if (qpair->reqq_start_iocbs)
3672                 qpair->reqq_start_iocbs(qpair);
3673         else
3674                 qla2x00_start_iocbs(vha, qpair->req);
3675         return ret;
3676 }
3677
3678 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3679         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3680         int ul_abort)
3681 {
3682         struct scsi_qla_host *vha;
3683         unsigned long flags = 0;
3684         int rc;
3685
3686         /* why use different vha? NPIV */
3687         if (cmd)
3688                 vha = cmd->vha;
3689         else
3690                 vha = qpair->vha;
3691
3692         if (ha_locked) {
3693                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3694                 if (rc == -ENOMEM)
3695                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3696                 goto done;
3697         }
3698         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3699         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3700         if (rc == -ENOMEM)
3701                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3702
3703 done:
3704         if (cmd && !ul_abort && !cmd->aborted) {
3705                 if (cmd->sg_mapped)
3706                         qlt_unmap_sg(vha, cmd);
3707                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3708         }
3709
3710         if (!ha_locked)
3711                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3712
3713         return;
3714 }
3715
3716 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3717 {
3718         struct list_head free_list;
3719         struct qla_tgt_cmd *cmd, *tcmd;
3720
3721         vha->hw->tgt.leak_exchg_thresh_hold =
3722             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3723
3724         cmd = tcmd = NULL;
3725         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3726                 INIT_LIST_HEAD(&free_list);
3727                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3728
3729                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3730                         list_del(&cmd->cmd_list);
3731                         /* This cmd was never sent to TCM.  There is no need
3732                          * to schedule free or call free_cmd
3733                          */
3734                         qlt_free_cmd(cmd);
3735                         vha->hw->tgt.num_qfull_cmds_alloc--;
3736                 }
3737         }
3738         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3739 }
3740
3741 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3742 {
3743         uint32_t total_leaked;
3744
3745         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3746
3747         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3748             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3749
3750                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3751                     "Chip reset due to exchange starvation: %d/%d.\n",
3752                     total_leaked, vha->hw->cur_fw_xcb_count);
3753
3754                 if (IS_P3P_TYPE(vha->hw))
3755                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3756                 else
3757                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3758                 qla2xxx_wake_dpc(vha);
3759         }
3760
3761 }
3762
3763 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3764 {
3765         struct qla_tgt *tgt = cmd->tgt;
3766         struct scsi_qla_host *vha = tgt->vha;
3767         struct se_cmd *se_cmd = &cmd->se_cmd;
3768         unsigned long flags;
3769
3770         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3771             "qla_target(%d): terminating exchange for aborted cmd=%p "
3772             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3773             se_cmd->tag);
3774
3775         spin_lock_irqsave(&cmd->cmd_lock, flags);
3776         if (cmd->aborted) {
3777                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3778                 /*
3779                  * It's normal to see 2 calls in this path:
3780                  *  1) XFER Rdy completion + CMD_T_ABORT
3781                  *  2) TCM TMR - drain_state_list
3782                  */
3783                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3784                     "multiple abort. %p transport_state %x, t_state %x, "
3785                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3786                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3787                 return -EIO;
3788         }
3789         cmd->aborted = 1;
3790         cmd->trc_flags |= TRC_ABORT;
3791         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3792
3793         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3794         return 0;
3795 }
3796 EXPORT_SYMBOL(qlt_abort_cmd);
3797
3798 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3799 {
3800         struct fc_port *sess = cmd->sess;
3801
3802         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3803             "%s: se_cmd[%p] ox_id %04x\n",
3804             __func__, &cmd->se_cmd,
3805             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3806
3807         BUG_ON(cmd->cmd_in_wq);
3808
3809         if (cmd->sg_mapped)
3810                 qlt_unmap_sg(cmd->vha, cmd);
3811
3812         if (!cmd->q_full)
3813                 qlt_decr_num_pend_cmds(cmd->vha);
3814
3815         BUG_ON(cmd->sg_mapped);
3816         cmd->jiffies_at_free = get_jiffies_64();
3817         if (unlikely(cmd->free_sg))
3818                 kfree(cmd->sg);
3819
3820         if (!sess || !sess->se_sess) {
3821                 WARN_ON(1);
3822                 return;
3823         }
3824         cmd->jiffies_at_free = get_jiffies_64();
3825         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3826 }
3827 EXPORT_SYMBOL(qlt_free_cmd);
3828
3829 /*
3830  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3831  */
3832 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3833         struct qla_tgt_cmd *cmd, uint32_t status)
3834 {
3835         int term = 0;
3836         struct scsi_qla_host *vha = qpair->vha;
3837
3838         if (cmd->se_cmd.prot_op)
3839                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3840                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3841                     "se_cmd=%p tag[%x] op %#x/%s",
3842                      cmd->lba, cmd->lba,
3843                      cmd->num_blks, &cmd->se_cmd,
3844                      cmd->atio.u.isp24.exchange_addr,
3845                      cmd->se_cmd.prot_op,
3846                      prot_op_str(cmd->se_cmd.prot_op));
3847
3848         if (ctio != NULL) {
3849                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3850
3851                 term = !(c->flags &
3852                     cpu_to_le16(OF_TERM_EXCH));
3853         } else
3854                 term = 1;
3855
3856         if (term)
3857                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3858
3859         return term;
3860 }
3861
3862
3863 /* ha->hardware_lock supposed to be held on entry */
3864 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3865         struct rsp_que *rsp, uint32_t handle, void *ctio)
3866 {
3867         void *cmd = NULL;
3868         struct req_que *req;
3869         int qid = GET_QID(handle);
3870         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3871
3872         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3873                 return NULL;
3874
3875         if (qid == rsp->req->id) {
3876                 req = rsp->req;
3877         } else if (vha->hw->req_q_map[qid]) {
3878                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3879                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3880                     vha->vp_idx, rsp->id, handle);
3881                 req = vha->hw->req_q_map[qid];
3882         } else {
3883                 return NULL;
3884         }
3885
3886         h &= QLA_CMD_HANDLE_MASK;
3887
3888         if (h != QLA_TGT_NULL_HANDLE) {
3889                 if (unlikely(h >= req->num_outstanding_cmds)) {
3890                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3891                             "qla_target(%d): Wrong handle %x received\n",
3892                             vha->vp_idx, handle);
3893                         return NULL;
3894                 }
3895
3896                 cmd = req->outstanding_cmds[h];
3897                 if (unlikely(cmd == NULL)) {
3898                         ql_dbg(ql_dbg_async, vha, 0xe053,
3899                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3900                                 vha->vp_idx, handle, req->id, rsp->id);
3901                         return NULL;
3902                 }
3903                 req->outstanding_cmds[h] = NULL;
3904         } else if (ctio != NULL) {
3905                 /* We can't get loop ID from CTIO7 */
3906                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3907                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3908                     "support NULL handles\n", vha->vp_idx);
3909                 return NULL;
3910         }
3911
3912         return cmd;
3913 }
3914
3915 /*
3916  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3917  */
3918 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3919     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3920 {
3921         struct qla_hw_data *ha = vha->hw;
3922         struct se_cmd *se_cmd;
3923         struct qla_tgt_cmd *cmd;
3924         struct qla_qpair *qpair = rsp->qpair;
3925
3926         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3927                 /* That could happen only in case of an error/reset/abort */
3928                 if (status != CTIO_SUCCESS) {
3929                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3930                             "Intermediate CTIO received"
3931                             " (status %x)\n", status);
3932                 }
3933                 return;
3934         }
3935
3936         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3937         if (cmd == NULL)
3938                 return;
3939
3940         se_cmd = &cmd->se_cmd;
3941         cmd->cmd_sent_to_fw = 0;
3942
3943         qlt_unmap_sg(vha, cmd);
3944
3945         if (unlikely(status != CTIO_SUCCESS)) {
3946                 switch (status & 0xFFFF) {
3947                 case CTIO_INVALID_RX_ID:
3948                         if (printk_ratelimit())
3949                                 dev_info(&vha->hw->pdev->dev,
3950                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3951                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3952                                     ((cmd->ctio_flags >> 9) & 0xf),
3953                                     cmd->ctio_flags);
3954
3955                         break;
3956                 case CTIO_LIP_RESET:
3957                 case CTIO_TARGET_RESET:
3958                 case CTIO_ABORTED:
3959                         /* driver request abort via Terminate exchange */
3960                 case CTIO_TIMEOUT:
3961                         /* They are OK */
3962                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3963                             "qla_target(%d): CTIO with "
3964                             "status %#x received, state %x, se_cmd %p, "
3965                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3966                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3967                             status, cmd->state, se_cmd);
3968                         break;
3969
3970                 case CTIO_PORT_LOGGED_OUT:
3971                 case CTIO_PORT_UNAVAILABLE:
3972                 {
3973                         int logged_out =
3974                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3975
3976                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3977                             "qla_target(%d): CTIO with %s status %x "
3978                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3979                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3980                             status, cmd->state, se_cmd);
3981
3982                         if (logged_out && cmd->sess) {
3983                                 /*
3984                                  * Session is already logged out, but we need
3985                                  * to notify initiator, who's not aware of this
3986                                  */
3987                                 cmd->sess->send_els_logo = 1;
3988                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3989                                     "%s %d %8phC post del sess\n",
3990                                     __func__, __LINE__, cmd->sess->port_name);
3991
3992                                 qlt_schedule_sess_for_deletion(cmd->sess);
3993                         }
3994                         break;
3995                 }
3996                 case CTIO_DIF_ERROR: {
3997                         struct ctio_crc_from_fw *crc =
3998                                 (struct ctio_crc_from_fw *)ctio;
3999                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4000                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4001                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4002                             "expect_dif[0x%llx]\n",
4003                             vha->vp_idx, status, cmd->state, se_cmd,
4004                             *((u64 *)&crc->actual_dif[0]),
4005                             *((u64 *)&crc->expected_dif[0]));
4006
4007                         qlt_handle_dif_error(qpair, cmd, ctio);
4008                         return;
4009                 }
4010                 default:
4011                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4012                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4013                             vha->vp_idx, status, cmd->state, se_cmd);
4014                         break;
4015                 }
4016
4017
4018                 /* "cmd->aborted" means
4019                  * cmd is already aborted/terminated, we don't
4020                  * need to terminate again.  The exchange is already
4021                  * cleaned up/freed at FW level.  Just cleanup at driver
4022                  * level.
4023                  */
4024                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4025                     (!cmd->aborted)) {
4026                         cmd->trc_flags |= TRC_CTIO_ERR;
4027                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4028                                 return;
4029                 }
4030         }
4031
4032         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4033                 cmd->trc_flags |= TRC_CTIO_DONE;
4034         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4035                 cmd->state = QLA_TGT_STATE_DATA_IN;
4036
4037                 if (status == CTIO_SUCCESS)
4038                         cmd->write_data_transferred = 1;
4039
4040                 ha->tgt.tgt_ops->handle_data(cmd);
4041                 return;
4042         } else if (cmd->aborted) {
4043                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4044                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4045                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4046         } else {
4047                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4049                     "qla_target(%d): A command in state (%d) should "
4050                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4051         }
4052
4053         if (unlikely(status != CTIO_SUCCESS) &&
4054                 !cmd->aborted) {
4055                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4056                 dump_stack();
4057         }
4058
4059         ha->tgt.tgt_ops->free_cmd(cmd);
4060 }
4061
4062 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4063         uint8_t task_codes)
4064 {
4065         int fcp_task_attr;
4066
4067         switch (task_codes) {
4068         case ATIO_SIMPLE_QUEUE:
4069                 fcp_task_attr = TCM_SIMPLE_TAG;
4070                 break;
4071         case ATIO_HEAD_OF_QUEUE:
4072                 fcp_task_attr = TCM_HEAD_TAG;
4073                 break;
4074         case ATIO_ORDERED_QUEUE:
4075                 fcp_task_attr = TCM_ORDERED_TAG;
4076                 break;
4077         case ATIO_ACA_QUEUE:
4078                 fcp_task_attr = TCM_ACA_TAG;
4079                 break;
4080         case ATIO_UNTAGGED:
4081                 fcp_task_attr = TCM_SIMPLE_TAG;
4082                 break;
4083         default:
4084                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4085                     "qla_target: unknown task code %x, use ORDERED instead\n",
4086                     task_codes);
4087                 fcp_task_attr = TCM_ORDERED_TAG;
4088                 break;
4089         }
4090
4091         return fcp_task_attr;
4092 }
4093
4094 /*
4095  * Process context for I/O path into tcm_qla2xxx code
4096  */
4097 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4098 {
4099         scsi_qla_host_t *vha = cmd->vha;
4100         struct qla_hw_data *ha = vha->hw;
4101         struct fc_port *sess = cmd->sess;
4102         struct atio_from_isp *atio = &cmd->atio;
4103         unsigned char *cdb;
4104         unsigned long flags;
4105         uint32_t data_length;
4106         int ret, fcp_task_attr, data_dir, bidi = 0;
4107         struct qla_qpair *qpair = cmd->qpair;
4108
4109         cmd->cmd_in_wq = 0;
4110         cmd->trc_flags |= TRC_DO_WORK;
4111
4112         if (cmd->aborted) {
4113                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4114                     "cmd with tag %u is aborted\n",
4115                     cmd->atio.u.isp24.exchange_addr);
4116                 goto out_term;
4117         }
4118
4119         spin_lock_init(&cmd->cmd_lock);
4120         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4121         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4122
4123         if (atio->u.isp24.fcp_cmnd.rddata &&
4124             atio->u.isp24.fcp_cmnd.wrdata) {
4125                 bidi = 1;
4126                 data_dir = DMA_TO_DEVICE;
4127         } else if (atio->u.isp24.fcp_cmnd.rddata)
4128                 data_dir = DMA_FROM_DEVICE;
4129         else if (atio->u.isp24.fcp_cmnd.wrdata)
4130                 data_dir = DMA_TO_DEVICE;
4131         else
4132                 data_dir = DMA_NONE;
4133
4134         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4135             atio->u.isp24.fcp_cmnd.task_attr);
4136         data_length = get_datalen_for_atio(atio);
4137
4138         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4139                                           fcp_task_attr, data_dir, bidi);
4140         if (ret != 0)
4141                 goto out_term;
4142         /*
4143          * Drop extra session reference from qlt_handle_cmd_for_atio().
4144          */
4145         ha->tgt.tgt_ops->put_sess(sess);
4146         return;
4147
4148 out_term:
4149         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4150         /*
4151          * cmd has not sent to target yet, so pass NULL as the second
4152          * argument to qlt_send_term_exchange() and free the memory here.
4153          */
4154         cmd->trc_flags |= TRC_DO_WORK_ERR;
4155         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4156         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4157
4158         qlt_decr_num_pend_cmds(vha);
4159         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4160         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4161
4162         ha->tgt.tgt_ops->put_sess(sess);
4163 }
4164
4165 static void qlt_do_work(struct work_struct *work)
4166 {
4167         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4168         scsi_qla_host_t *vha = cmd->vha;
4169         unsigned long flags;
4170
4171         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4172         list_del(&cmd->cmd_list);
4173         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4174
4175         __qlt_do_work(cmd);
4176 }
4177
4178 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4179 {
4180         unsigned long flags;
4181         struct qla_hw_data *ha = vha->hw;
4182         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4183         void *node;
4184         u64 key = 0;
4185
4186         ql_log(ql_log_info, vha, 0x706c,
4187             "User update Number of Active Qpairs %d\n",
4188             ha->tgt.num_act_qpairs);
4189
4190         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4191
4192         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4193                 btree_remove64(&tgt->lun_qpair_map, key);
4194
4195         ha->base_qpair->lun_cnt = 0;
4196         for (key = 0; key < ha->max_qpairs; key++)
4197                 if (ha->queue_pair_map[key])
4198                         ha->queue_pair_map[key]->lun_cnt = 0;
4199
4200         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4201 }
4202
4203 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4204         struct qla_tgt_cmd *cmd)
4205 {
4206         struct qla_qpair *qpair, *qp;
4207         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4208         struct qla_qpair_hint *h;
4209
4210         if (vha->flags.qpairs_available) {
4211                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4212                 if (unlikely(!h)) {
4213                         /* spread lun to qpair ratio evently */
4214                         int lcnt = 0, rc;
4215                         struct scsi_qla_host *base_vha =
4216                                 pci_get_drvdata(vha->hw->pdev);
4217
4218                         qpair = vha->hw->base_qpair;
4219                         if (qpair->lun_cnt == 0) {
4220                                 qpair->lun_cnt++;
4221                                 h = qla_qpair_to_hint(tgt, qpair);
4222                                 BUG_ON(!h);
4223                                 rc = btree_insert64(&tgt->lun_qpair_map,
4224                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4225                                 if (rc) {
4226                                         qpair->lun_cnt--;
4227                                         ql_log(ql_log_info, vha, 0xd037,
4228                                             "Unable to insert lun %llx into lun_qpair_map\n",
4229                                             cmd->unpacked_lun);
4230                                 }
4231                                 goto out;
4232                         } else {
4233                                 lcnt = qpair->lun_cnt;
4234                         }
4235
4236                         h = NULL;
4237                         list_for_each_entry(qp, &base_vha->qp_list,
4238                             qp_list_elem) {
4239                                 if (qp->lun_cnt == 0) {
4240                                         qp->lun_cnt++;
4241                                         h = qla_qpair_to_hint(tgt, qp);
4242                                         BUG_ON(!h);
4243                                         rc = btree_insert64(&tgt->lun_qpair_map,
4244                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4245                                         if (rc) {
4246                                                 qp->lun_cnt--;
4247                                                 ql_log(ql_log_info, vha, 0xd038,
4248                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4249                                                         cmd->unpacked_lun);
4250                                         }
4251                                         qpair = qp;
4252                                         goto out;
4253                                 } else {
4254                                         if (qp->lun_cnt < lcnt) {
4255                                                 lcnt = qp->lun_cnt;
4256                                                 qpair = qp;
4257                                                 continue;
4258                                         }
4259                                 }
4260                         }
4261                         BUG_ON(!qpair);
4262                         qpair->lun_cnt++;
4263                         h = qla_qpair_to_hint(tgt, qpair);
4264                         BUG_ON(!h);
4265                         rc = btree_insert64(&tgt->lun_qpair_map,
4266                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4267                         if (rc) {
4268                                 qpair->lun_cnt--;
4269                                 ql_log(ql_log_info, vha, 0xd039,
4270                                    "Unable to insert lun %llx into lun_qpair_map\n",
4271                                    cmd->unpacked_lun);
4272                         }
4273                 }
4274         } else {
4275                 h = &tgt->qphints[0];
4276         }
4277 out:
4278         cmd->qpair = h->qpair;
4279         cmd->se_cmd.cpuid = h->cpuid;
4280 }
4281
4282 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4283                                        struct fc_port *sess,
4284                                        struct atio_from_isp *atio)
4285 {
4286         struct qla_tgt_cmd *cmd;
4287
4288         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4289         if (!cmd)
4290                 return NULL;
4291
4292         cmd->cmd_type = TYPE_TGT_CMD;
4293         memcpy(&cmd->atio, atio, sizeof(*atio));
4294         cmd->state = QLA_TGT_STATE_NEW;
4295         cmd->tgt = vha->vha_tgt.qla_tgt;
4296         qlt_incr_num_pend_cmds(vha);
4297         cmd->vha = vha;
4298         cmd->sess = sess;
4299         cmd->loop_id = sess->loop_id;
4300         cmd->conf_compl_supported = sess->conf_compl_supported;
4301
4302         cmd->trc_flags = 0;
4303         cmd->jiffies_at_alloc = get_jiffies_64();
4304
4305         cmd->unpacked_lun = scsilun_to_int(
4306             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4307         qlt_assign_qpair(vha, cmd);
4308         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4309         cmd->vp_idx = vha->vp_idx;
4310
4311         return cmd;
4312 }
4313
4314 /* ha->hardware_lock supposed to be held on entry */
4315 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4316         struct atio_from_isp *atio)
4317 {
4318         struct qla_hw_data *ha = vha->hw;
4319         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4320         struct fc_port *sess;
4321         struct qla_tgt_cmd *cmd;
4322         unsigned long flags;
4323         port_id_t id;
4324
4325         if (unlikely(tgt->tgt_stop)) {
4326                 ql_dbg(ql_dbg_io, vha, 0x3061,
4327                     "New command while device %p is shutting down\n", tgt);
4328                 return -ENODEV;
4329         }
4330
4331         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4332         if (IS_SW_RESV_ADDR(id))
4333                 return -EBUSY;
4334
4335         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4336         if (unlikely(!sess))
4337                 return -EFAULT;
4338
4339         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4340          * session deletion, but it's still in sess_del_work wq */
4341         if (sess->deleted) {
4342                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4343                     "New command while old session %p is being deleted\n",
4344                     sess);
4345                 return -EFAULT;
4346         }
4347
4348         /*
4349          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4350          */
4351         if (!kref_get_unless_zero(&sess->sess_kref)) {
4352                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4353                     "%s: kref_get fail, %8phC oxid %x \n",
4354                     __func__, sess->port_name,
4355                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4356                 return -EFAULT;
4357         }
4358
4359         cmd = qlt_get_tag(vha, sess, atio);
4360         if (!cmd) {
4361                 ql_dbg(ql_dbg_io, vha, 0x3062,
4362                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4363                 ha->tgt.tgt_ops->put_sess(sess);
4364                 return -EBUSY;
4365         }
4366
4367         cmd->cmd_in_wq = 1;
4368         cmd->trc_flags |= TRC_NEW_CMD;
4369
4370         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4371         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4372         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4373
4374         INIT_WORK(&cmd->work, qlt_do_work);
4375         if (vha->flags.qpairs_available) {
4376                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4377         } else if (ha->msix_count) {
4378                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4379                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4380                             &cmd->work);
4381                 else
4382                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4383                             &cmd->work);
4384         } else {
4385                 queue_work(qla_tgt_wq, &cmd->work);
4386         }
4387
4388         return 0;
4389 }
4390
4391 /* ha->hardware_lock supposed to be held on entry */
4392 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4393         int fn, void *iocb, int flags)
4394 {
4395         struct scsi_qla_host *vha = sess->vha;
4396         struct qla_hw_data *ha = vha->hw;
4397         struct qla_tgt_mgmt_cmd *mcmd;
4398         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4399         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4400
4401         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4402         if (!mcmd) {
4403                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4404                     "qla_target(%d): Allocation of management "
4405                     "command failed, some commands and their data could "
4406                     "leak\n", vha->vp_idx);
4407                 return -ENOMEM;
4408         }
4409         memset(mcmd, 0, sizeof(*mcmd));
4410         mcmd->sess = sess;
4411
4412         if (iocb) {
4413                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4414                     sizeof(mcmd->orig_iocb.imm_ntfy));
4415         }
4416         mcmd->tmr_func = fn;
4417         mcmd->flags = flags;
4418         mcmd->reset_count = ha->base_qpair->chip_reset;
4419         mcmd->qpair = h->qpair;
4420         mcmd->vha = vha;
4421         mcmd->se_cmd.cpuid = h->cpuid;
4422         mcmd->unpacked_lun = lun;
4423
4424         switch (fn) {
4425         case QLA_TGT_LUN_RESET:
4426         case QLA_TGT_CLEAR_TS:
4427         case QLA_TGT_ABORT_TS:
4428                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4429                 fallthrough;
4430         case QLA_TGT_CLEAR_ACA:
4431                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4432                 mcmd->qpair = h->qpair;
4433                 mcmd->se_cmd.cpuid = h->cpuid;
4434                 break;
4435
4436         case QLA_TGT_TARGET_RESET:
4437         case QLA_TGT_NEXUS_LOSS_SESS:
4438         case QLA_TGT_NEXUS_LOSS:
4439         case QLA_TGT_ABORT_ALL:
4440         default:
4441                 /* no-op */
4442                 break;
4443         }
4444
4445         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4446         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4447             &mcmd->work);
4448
4449         return 0;
4450 }
4451
4452 /* ha->hardware_lock supposed to be held on entry */
4453 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4454 {
4455         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4456         struct qla_hw_data *ha = vha->hw;
4457         struct fc_port *sess;
4458         u64 unpacked_lun;
4459         int fn;
4460         unsigned long flags;
4461
4462         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4463
4464         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4465         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4466             a->u.isp24.fcp_hdr.s_id);
4467         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4468
4469         unpacked_lun =
4470             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4471
4472         if (sess == NULL || sess->deleted)
4473                 return -EFAULT;
4474
4475         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4476 }
4477
4478 /* ha->hardware_lock supposed to be held on entry */
4479 static int __qlt_abort_task(struct scsi_qla_host *vha,
4480         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4481 {
4482         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4483         struct qla_hw_data *ha = vha->hw;
4484         struct qla_tgt_mgmt_cmd *mcmd;
4485         u64 unpacked_lun;
4486         int rc;
4487
4488         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4489         if (mcmd == NULL) {
4490                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4491                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4492                     vha->vp_idx, __func__);
4493                 return -ENOMEM;
4494         }
4495         memset(mcmd, 0, sizeof(*mcmd));
4496
4497         mcmd->sess = sess;
4498         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4499             sizeof(mcmd->orig_iocb.imm_ntfy));
4500
4501         unpacked_lun =
4502             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4503         mcmd->reset_count = ha->base_qpair->chip_reset;
4504         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4505         mcmd->qpair = ha->base_qpair;
4506
4507         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4508             le16_to_cpu(iocb->u.isp2x.seq_id));
4509         if (rc != 0) {
4510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4511                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4512                     vha->vp_idx, rc);
4513                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4514                 return -EFAULT;
4515         }
4516
4517         return 0;
4518 }
4519
4520 /* ha->hardware_lock supposed to be held on entry */
4521 static int qlt_abort_task(struct scsi_qla_host *vha,
4522         struct imm_ntfy_from_isp *iocb)
4523 {
4524         struct qla_hw_data *ha = vha->hw;
4525         struct fc_port *sess;
4526         int loop_id;
4527         unsigned long flags;
4528
4529         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4530
4531         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4532         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4533         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4534
4535         if (sess == NULL) {
4536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4537                     "qla_target(%d): task abort for unexisting "
4538                     "session\n", vha->vp_idx);
4539                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4540                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4541         }
4542
4543         return __qlt_abort_task(vha, iocb, sess);
4544 }
4545
4546 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4547 {
4548         if (rc != MBS_COMMAND_COMPLETE) {
4549                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4550                         "%s: se_sess %p / sess %p from"
4551                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4552                         " LOGO failed: %#x\n",
4553                         __func__,
4554                         fcport->se_sess,
4555                         fcport,
4556                         fcport->port_name, fcport->loop_id,
4557                         fcport->d_id.b.domain, fcport->d_id.b.area,
4558                         fcport->d_id.b.al_pa, rc);
4559         }
4560
4561         fcport->logout_completed = 1;
4562 }
4563
4564 /*
4565 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4566 *
4567 * Schedules sessions with matching port_id/loop_id but different wwn for
4568 * deletion. Returns existing session with matching wwn if present.
4569 * Null otherwise.
4570 */
4571 struct fc_port *
4572 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4573     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4574 {
4575         struct fc_port *sess = NULL, *other_sess;
4576         uint64_t other_wwn;
4577
4578         *conflict_sess = NULL;
4579
4580         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4581
4582                 other_wwn = wwn_to_u64(other_sess->port_name);
4583
4584                 if (wwn == other_wwn) {
4585                         WARN_ON(sess);
4586                         sess = other_sess;
4587                         continue;
4588                 }
4589
4590                 /* find other sess with nport_id collision */
4591                 if (port_id.b24 == other_sess->d_id.b24) {
4592                         if (loop_id != other_sess->loop_id) {
4593                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4594                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4595                                     other_sess, other_sess->loop_id, other_wwn);
4596
4597                                 /*
4598                                  * logout_on_delete is set by default, but another
4599                                  * session that has the same s_id/loop_id combo
4600                                  * might have cleared it when requested this session
4601                                  * deletion, so don't touch it
4602                                  */
4603                                 qlt_schedule_sess_for_deletion(other_sess);
4604                         } else {
4605                                 /*
4606                                  * Another wwn used to have our s_id/loop_id
4607                                  * kill the session, but don't free the loop_id
4608                                  */
4609                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4610                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4611                                     other_sess, other_sess->loop_id, other_wwn);
4612
4613                                 other_sess->keep_nport_handle = 1;
4614                                 if (other_sess->disc_state != DSC_DELETED)
4615                                         *conflict_sess = other_sess;
4616                                 qlt_schedule_sess_for_deletion(other_sess);
4617                         }
4618                         continue;
4619                 }
4620
4621                 /* find other sess with nport handle collision */
4622                 if ((loop_id == other_sess->loop_id) &&
4623                         (loop_id != FC_NO_LOOP_ID)) {
4624                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4625                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4626                                other_sess, other_sess->loop_id, other_wwn);
4627
4628                         /* Same loop_id but different s_id
4629                          * Ok to kill and logout */
4630                         qlt_schedule_sess_for_deletion(other_sess);
4631                 }
4632         }
4633
4634         return sess;
4635 }
4636
4637 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4638 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4639 {
4640         struct qla_tgt_sess_op *op;
4641         struct qla_tgt_cmd *cmd;
4642         uint32_t key;
4643         int count = 0;
4644         unsigned long flags;
4645
4646         key = (((u32)s_id->b.domain << 16) |
4647                ((u32)s_id->b.area   <<  8) |
4648                ((u32)s_id->b.al_pa));
4649
4650         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4651         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4652                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4653
4654                 if (op_key == key) {
4655                         op->aborted = true;
4656                         count++;
4657                 }
4658         }
4659
4660         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4661                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4662
4663                 if (op_key == key) {
4664                         op->aborted = true;
4665                         count++;
4666                 }
4667         }
4668
4669         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4670                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4671
4672                 if (cmd_key == key) {
4673                         cmd->aborted = 1;
4674                         count++;
4675                 }
4676         }
4677         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4678
4679         return count;
4680 }
4681
4682 static int qlt_handle_login(struct scsi_qla_host *vha,
4683     struct imm_ntfy_from_isp *iocb)
4684 {
4685         struct fc_port *sess = NULL, *conflict_sess = NULL;
4686         uint64_t wwn;
4687         port_id_t port_id;
4688         uint16_t loop_id, wd3_lo;
4689         int res = 0;
4690         struct qlt_plogi_ack_t *pla;
4691         unsigned long flags;
4692
4693         lockdep_assert_held(&vha->hw->hardware_lock);
4694
4695         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4696
4697         port_id.b.domain = iocb->u.isp24.port_id[2];
4698         port_id.b.area   = iocb->u.isp24.port_id[1];
4699         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4700         port_id.b.rsvd_1 = 0;
4701
4702         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4703
4704         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4705         abort_cmds_for_s_id(vha, &port_id);
4706
4707         if (wwn) {
4708                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4709                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4710                     port_id, loop_id, &conflict_sess);
4711                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4712         } else {
4713                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4714                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4715                     __func__, __LINE__, loop_id, port_id.b24);
4716                 qlt_send_term_imm_notif(vha, iocb, 1);
4717                 goto out;
4718         }
4719
4720         if (IS_SW_RESV_ADDR(port_id)) {
4721                 res = 1;
4722                 goto out;
4723         }
4724
4725         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4726         if (!pla) {
4727                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4728                     "%s %d %8phC Term INOT due to mem alloc fail",
4729                     __func__, __LINE__,
4730                     iocb->u.isp24.port_name);
4731                 qlt_send_term_imm_notif(vha, iocb, 1);
4732                 goto out;
4733         }
4734
4735         if (conflict_sess) {
4736                 conflict_sess->login_gen++;
4737                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4738                     QLT_PLOGI_LINK_CONFLICT);
4739         }
4740
4741         if (!sess) {
4742                 pla->ref_count++;
4743                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4744                     "%s %d %8phC post new sess\n",
4745                     __func__, __LINE__, iocb->u.isp24.port_name);
4746                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4747                         qla24xx_post_newsess_work(vha, &port_id,
4748                             iocb->u.isp24.port_name,
4749                             iocb->u.isp24.u.plogi.node_name,
4750                             pla, 0);
4751                 else
4752                         qla24xx_post_newsess_work(vha, &port_id,
4753                             iocb->u.isp24.port_name, NULL,
4754                             pla, 0);
4755
4756                 goto out;
4757         }
4758
4759         if (sess->disc_state == DSC_UPD_FCPORT) {
4760                 u16 sec;
4761
4762                 /*
4763                  * Remote port registration is still going on from
4764                  * previous login. Allow it to finish before we
4765                  * accept the new login.
4766                  */
4767                 sess->next_disc_state = DSC_DELETE_PEND;
4768                 sec = jiffies_to_msecs(jiffies -
4769                     sess->jiffies_at_registration) / 1000;
4770                 if (sess->sec_since_registration < sec && sec &&
4771                     !(sec % 5)) {
4772                         sess->sec_since_registration = sec;
4773                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4774                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4775                             __func__, sess->port_name, sec);
4776                 }
4777
4778                 if (!conflict_sess) {
4779                         list_del(&pla->list);
4780                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4781                 }
4782
4783                 qlt_send_term_imm_notif(vha, iocb, 1);
4784                 goto out;
4785         }
4786
4787         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4788         sess->d_id = port_id;
4789         sess->login_gen++;
4790
4791         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4792                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4793                 sess->local = 0;
4794                 sess->loop_id = loop_id;
4795                 sess->d_id = port_id;
4796                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4797                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4798
4799                 if (wd3_lo & BIT_7)
4800                         sess->conf_compl_supported = 1;
4801
4802                 if ((wd3_lo & BIT_4) == 0)
4803                         sess->port_type = FCT_INITIATOR;
4804                 else
4805                         sess->port_type = FCT_TARGET;
4806
4807         } else
4808                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4809
4810
4811         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4812             "%s %d %8phC  DS %d\n",
4813             __func__, __LINE__, sess->port_name, sess->disc_state);
4814
4815         switch (sess->disc_state) {
4816         case DSC_DELETED:
4817         case DSC_LOGIN_PEND:
4818                 qlt_plogi_ack_unref(vha, pla);
4819                 break;
4820
4821         default:
4822                 /*
4823                  * Under normal circumstances we want to release nport handle
4824                  * during LOGO process to avoid nport handle leaks inside FW.
4825                  * The exception is when LOGO is done while another PLOGI with
4826                  * the same nport handle is waiting as might be the case here.
4827                  * Note: there is always a possibily of a race where session
4828                  * deletion has already started for other reasons (e.g. ACL
4829                  * removal) and now PLOGI arrives:
4830                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4831                  *    FW must have assigned this PLOGI a new/same handle and we
4832                  *    can proceed ACK'ing it as usual when session deletion
4833                  *    completes.
4834                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4835                  *    bit reached it, the handle has now been released. We'll
4836                  *    get an error when we ACK this PLOGI. Nothing will be sent
4837                  *    back to initiator. Initiator should eventually retry
4838                  *    PLOGI and situation will correct itself.
4839                  */
4840                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4841                     (sess->d_id.b24 == port_id.b24));
4842
4843                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4844                     "%s %d %8phC post del sess\n",
4845                     __func__, __LINE__, sess->port_name);
4846
4847
4848                 qlt_schedule_sess_for_deletion(sess);
4849                 break;
4850         }
4851 out:
4852         return res;
4853 }
4854
4855 /*
4856  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4857  */
4858 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4859         struct imm_ntfy_from_isp *iocb)
4860 {
4861         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4862         struct qla_hw_data *ha = vha->hw;
4863         struct fc_port *sess = NULL, *conflict_sess = NULL;
4864         uint64_t wwn;
4865         port_id_t port_id;
4866         uint16_t loop_id;
4867         uint16_t wd3_lo;
4868         int res = 0;
4869         unsigned long flags;
4870
4871         lockdep_assert_held(&ha->hardware_lock);
4872
4873         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4874
4875         port_id.b.domain = iocb->u.isp24.port_id[2];
4876         port_id.b.area   = iocb->u.isp24.port_id[1];
4877         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4878         port_id.b.rsvd_1 = 0;
4879
4880         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4881
4882         ql_dbg(ql_dbg_disc, vha, 0xf026,
4883             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4884             vha->vp_idx, iocb->u.isp24.port_id[2],
4885                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4886                    iocb->u.isp24.status_subcode, loop_id,
4887                 iocb->u.isp24.port_name);
4888
4889         /* res = 1 means ack at the end of thread
4890          * res = 0 means ack async/later.
4891          */
4892         switch (iocb->u.isp24.status_subcode) {
4893         case ELS_PLOGI:
4894                 res = qlt_handle_login(vha, iocb);
4895                 break;
4896
4897         case ELS_PRLI:
4898                 if (N2N_TOPO(ha)) {
4899                         sess = qla2x00_find_fcport_by_wwpn(vha,
4900                             iocb->u.isp24.port_name, 1);
4901
4902                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4903                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4904                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4905                                     __func__, __LINE__,
4906                                     iocb->u.isp24.port_name);
4907                                 qlt_send_term_imm_notif(vha, iocb, 1);
4908                                 break;
4909                         }
4910
4911                         res = qlt_handle_login(vha, iocb);
4912                         break;
4913                 }
4914
4915                 if (IS_SW_RESV_ADDR(port_id)) {
4916                         res = 1;
4917                         break;
4918                 }
4919
4920                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4921
4922                 if (wwn) {
4923                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4924                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4925                                 loop_id, &conflict_sess);
4926                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4927                 }
4928
4929                 if (conflict_sess) {
4930                         switch (conflict_sess->disc_state) {
4931                         case DSC_DELETED:
4932                         case DSC_DELETE_PEND:
4933                                 break;
4934                         default:
4935                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4936                                     "PRLI with conflicting sess %p port %8phC\n",
4937                                     conflict_sess, conflict_sess->port_name);
4938                                 conflict_sess->fw_login_state =
4939                                     DSC_LS_PORT_UNAVAIL;
4940                                 qlt_send_term_imm_notif(vha, iocb, 1);
4941                                 res = 0;
4942                                 break;
4943                         }
4944                 }
4945
4946                 if (sess != NULL) {
4947                         bool delete = false;
4948                         int sec;
4949
4950                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4951                         switch (sess->fw_login_state) {
4952                         case DSC_LS_PLOGI_PEND:
4953                         case DSC_LS_PLOGI_COMP:
4954                         case DSC_LS_PRLI_COMP:
4955                                 break;
4956                         default:
4957                                 delete = true;
4958                                 break;
4959                         }
4960
4961                         switch (sess->disc_state) {
4962                         case DSC_UPD_FCPORT:
4963                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4964                                     flags);
4965
4966                                 sec = jiffies_to_msecs(jiffies -
4967                                     sess->jiffies_at_registration)/1000;
4968                                 if (sess->sec_since_registration < sec && sec &&
4969                                     !(sec % 5)) {
4970                                         sess->sec_since_registration = sec;
4971                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4972                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4973                                             __func__, sess->port_name, sec);
4974                                 }
4975                                 qlt_send_term_imm_notif(vha, iocb, 1);
4976                                 return 0;
4977
4978                         case DSC_LOGIN_PEND:
4979                         case DSC_GPDB:
4980                         case DSC_LOGIN_COMPLETE:
4981                         case DSC_ADISC:
4982                                 delete = false;
4983                                 break;
4984                         default:
4985                                 break;
4986                         }
4987
4988                         if (delete) {
4989                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4990                                     flags);
4991                                 /*
4992                                  * Impatient initiator sent PRLI before last
4993                                  * PLOGI could finish. Will force him to re-try,
4994                                  * while last one finishes.
4995                                  */
4996                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4997                                     "sess %p PRLI received, before plogi ack.\n",
4998                                     sess);
4999                                 qlt_send_term_imm_notif(vha, iocb, 1);
5000                                 res = 0;
5001                                 break;
5002                         }
5003
5004                         /*
5005                          * This shouldn't happen under normal circumstances,
5006                          * since we have deleted the old session during PLOGI
5007                          */
5008                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5009                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5010                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5011
5012                         sess->local = 0;
5013                         sess->loop_id = loop_id;
5014                         sess->d_id = port_id;
5015                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5016
5017                         if (wd3_lo & BIT_7)
5018                                 sess->conf_compl_supported = 1;
5019
5020                         if ((wd3_lo & BIT_4) == 0)
5021                                 sess->port_type = FCT_INITIATOR;
5022                         else
5023                                 sess->port_type = FCT_TARGET;
5024
5025                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5026                 }
5027                 res = 1; /* send notify ack */
5028
5029                 /* Make session global (not used in fabric mode) */
5030                 if (ha->current_topology != ISP_CFG_F) {
5031                         if (sess) {
5032                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5033                                     "%s %d %8phC post nack\n",
5034                                     __func__, __LINE__, sess->port_name);
5035                                 qla24xx_post_nack_work(vha, sess, iocb,
5036                                         SRB_NACK_PRLI);
5037                                 res = 0;
5038                         } else {
5039                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5040                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5041                                 qla2xxx_wake_dpc(vha);
5042                         }
5043                 } else {
5044                         if (sess) {
5045                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5046                                     "%s %d %8phC post nack\n",
5047                                     __func__, __LINE__, sess->port_name);
5048                                 qla24xx_post_nack_work(vha, sess, iocb,
5049                                         SRB_NACK_PRLI);
5050                                 res = 0;
5051                         }
5052                 }
5053                 break;
5054
5055         case ELS_TPRLO:
5056                 if (le16_to_cpu(iocb->u.isp24.flags) &
5057                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5058                         loop_id = 0xFFFF;
5059                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5060                         res = 1;
5061                         break;
5062                 }
5063                 fallthrough;
5064         case ELS_LOGO:
5065         case ELS_PRLO:
5066                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5067                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5068                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5069
5070                 if (sess) {
5071                         sess->login_gen++;
5072                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5073                         sess->logo_ack_needed = 1;
5074                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5075                 }
5076
5077                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5078
5079                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5080                     "%s: logo %llx res %d sess %p ",
5081                     __func__, wwn, res, sess);
5082                 if (res == 0) {
5083                         /*
5084                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5085                          * for LOGO_ACK & sess delete
5086                          */
5087                         BUG_ON(!sess);
5088                         res = 0;
5089                 } else {
5090                         /* cmd did not go to upper layer. */
5091                         if (sess) {
5092                                 qlt_schedule_sess_for_deletion(sess);
5093                                 res = 0;
5094                         }
5095                         /* else logo will be ack */
5096                 }
5097                 break;
5098         case ELS_PDISC:
5099         case ELS_ADISC:
5100         {
5101                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5102
5103                 if (tgt->link_reinit_iocb_pending) {
5104                         qlt_send_notify_ack(ha->base_qpair,
5105                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5106                         tgt->link_reinit_iocb_pending = 0;
5107                 }
5108
5109                 sess = qla2x00_find_fcport_by_wwpn(vha,
5110                     iocb->u.isp24.port_name, 1);
5111                 if (sess) {
5112                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5113                                 "sess %p lid %d|%d DS %d LS %d\n",
5114                                 sess, sess->loop_id, loop_id,
5115                                 sess->disc_state, sess->fw_login_state);
5116                 }
5117
5118                 res = 1; /* send notify ack */
5119                 break;
5120         }
5121
5122         case ELS_FLOGI: /* should never happen */
5123         default:
5124                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5125                     "qla_target(%d): Unsupported ELS command %x "
5126                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5127                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5128                 break;
5129         }
5130
5131         ql_dbg(ql_dbg_disc, vha, 0xf026,
5132             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5133             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5134
5135         return res;
5136 }
5137
5138 /*
5139  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5140  */
5141 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5142         struct imm_ntfy_from_isp *iocb)
5143 {
5144         struct qla_hw_data *ha = vha->hw;
5145         uint32_t add_flags = 0;
5146         int send_notify_ack = 1;
5147         uint16_t status;
5148
5149         lockdep_assert_held(&ha->hardware_lock);
5150
5151         status = le16_to_cpu(iocb->u.isp2x.status);
5152         switch (status) {
5153         case IMM_NTFY_LIP_RESET:
5154         {
5155                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5156                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5157                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5158                     iocb->u.isp24.status_subcode);
5159
5160                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5161                         send_notify_ack = 0;
5162                 break;
5163         }
5164
5165         case IMM_NTFY_LIP_LINK_REINIT:
5166         {
5167                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5168
5169                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5170                     "qla_target(%d): LINK REINIT (loop %#x, "
5171                     "subcode %x)\n", vha->vp_idx,
5172                     le16_to_cpu(iocb->u.isp24.nport_handle),
5173                     iocb->u.isp24.status_subcode);
5174                 if (tgt->link_reinit_iocb_pending) {
5175                         qlt_send_notify_ack(ha->base_qpair,
5176                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5177                 }
5178                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5179                 tgt->link_reinit_iocb_pending = 1;
5180                 /*
5181                  * QLogic requires to wait after LINK REINIT for possible
5182                  * PDISC or ADISC ELS commands
5183                  */
5184                 send_notify_ack = 0;
5185                 break;
5186         }
5187
5188         case IMM_NTFY_PORT_LOGOUT:
5189                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5190                     "qla_target(%d): Port logout (loop "
5191                     "%#x, subcode %x)\n", vha->vp_idx,
5192                     le16_to_cpu(iocb->u.isp24.nport_handle),
5193                     iocb->u.isp24.status_subcode);
5194
5195                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5196                         send_notify_ack = 0;
5197                 /* The sessions will be cleared in the callback, if needed */
5198                 break;
5199
5200         case IMM_NTFY_GLBL_TPRLO:
5201                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5202                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5203                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5204                         send_notify_ack = 0;
5205                 /* The sessions will be cleared in the callback, if needed */
5206                 break;
5207
5208         case IMM_NTFY_PORT_CONFIG:
5209                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5210                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5211                     status);
5212                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5213                         send_notify_ack = 0;
5214                 /* The sessions will be cleared in the callback, if needed */
5215                 break;
5216
5217         case IMM_NTFY_GLBL_LOGO:
5218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5219                     "qla_target(%d): Link failure detected\n",
5220                     vha->vp_idx);
5221                 /* I_T nexus loss */
5222                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5223                         send_notify_ack = 0;
5224                 break;
5225
5226         case IMM_NTFY_IOCB_OVERFLOW:
5227                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5228                     "qla_target(%d): Cannot provide requested "
5229                     "capability (IOCB overflowed the immediate notify "
5230                     "resource count)\n", vha->vp_idx);
5231                 break;
5232
5233         case IMM_NTFY_ABORT_TASK:
5234                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5235                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5236                     "L %#x)\n", vha->vp_idx,
5237                     le16_to_cpu(iocb->u.isp2x.seq_id),
5238                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5239                     le16_to_cpu(iocb->u.isp2x.lun));
5240                 if (qlt_abort_task(vha, iocb) == 0)
5241                         send_notify_ack = 0;
5242                 break;
5243
5244         case IMM_NTFY_RESOURCE:
5245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5246                     "qla_target(%d): Out of resources, host %ld\n",
5247                     vha->vp_idx, vha->host_no);
5248                 break;
5249
5250         case IMM_NTFY_MSG_RX:
5251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5252                     "qla_target(%d): Immediate notify task %x\n",
5253                     vha->vp_idx, iocb->u.isp2x.task_flags);
5254                 break;
5255
5256         case IMM_NTFY_ELS:
5257                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5258                         send_notify_ack = 0;
5259                 break;
5260         default:
5261                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5262                     "qla_target(%d): Received unknown immediate "
5263                     "notify status %x\n", vha->vp_idx, status);
5264                 break;
5265         }
5266
5267         if (send_notify_ack)
5268                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5269                     0, 0);
5270 }
5271
5272 /*
5273  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5274  * This function sends busy to ISP 2xxx or 24xx.
5275  */
5276 static int __qlt_send_busy(struct qla_qpair *qpair,
5277         struct atio_from_isp *atio, uint16_t status)
5278 {
5279         struct scsi_qla_host *vha = qpair->vha;
5280         struct ctio7_to_24xx *ctio24;
5281         struct qla_hw_data *ha = vha->hw;
5282         request_t *pkt;
5283         struct fc_port *sess = NULL;
5284         unsigned long flags;
5285         u16 temp;
5286         port_id_t id;
5287
5288         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5289
5290         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5291         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5292         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5293         if (!sess) {
5294                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5295                 return 0;
5296         }
5297         /* Sending marker isn't necessary, since we called from ISR */
5298
5299         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5300         if (!pkt) {
5301                 ql_dbg(ql_dbg_io, vha, 0x3063,
5302                     "qla_target(%d): %s failed: unable to allocate "
5303                     "request packet", vha->vp_idx, __func__);
5304                 return -ENOMEM;
5305         }
5306
5307         qpair->tgt_counters.num_q_full_sent++;
5308         pkt->entry_count = 1;
5309         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5310
5311         ctio24 = (struct ctio7_to_24xx *)pkt;
5312         ctio24->entry_type = CTIO_TYPE7;
5313         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5314         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5315         ctio24->vp_index = vha->vp_idx;
5316         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5317         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5318         temp = (atio->u.isp24.attr << 9) |
5319                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5320                 CTIO7_FLAGS_DONT_RET_CTIO;
5321         ctio24->u.status1.flags = cpu_to_le16(temp);
5322         /*
5323          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5324          * if the explicit conformation is used.
5325          */
5326         ctio24->u.status1.ox_id =
5327                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5328         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5329
5330         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5331
5332         if (ctio24->u.status1.residual != 0)
5333                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5334
5335         /* Memory Barrier */
5336         wmb();
5337         if (qpair->reqq_start_iocbs)
5338                 qpair->reqq_start_iocbs(qpair);
5339         else
5340                 qla2x00_start_iocbs(vha, qpair->req);
5341         return 0;
5342 }
5343
5344 /*
5345  * This routine is used to allocate a command for either a QFull condition
5346  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5347  * out previously.
5348  */
5349 static void
5350 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5351         struct atio_from_isp *atio, uint16_t status, int qfull)
5352 {
5353         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5354         struct qla_hw_data *ha = vha->hw;
5355         struct fc_port *sess;
5356         struct qla_tgt_cmd *cmd;
5357         unsigned long flags;
5358
5359         if (unlikely(tgt->tgt_stop)) {
5360                 ql_dbg(ql_dbg_io, vha, 0x300a,
5361                         "New command while device %p is shutting down\n", tgt);
5362                 return;
5363         }
5364
5365         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5366                 vha->hw->tgt.num_qfull_cmds_dropped++;
5367                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5368                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5369                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5370                                 vha->hw->tgt.num_qfull_cmds_dropped;
5371
5372                 ql_dbg(ql_dbg_io, vha, 0x3068,
5373                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5374                         vha->vp_idx, __func__,
5375                         vha->hw->tgt.num_qfull_cmds_dropped);
5376
5377                 qlt_chk_exch_leak_thresh_hold(vha);
5378                 return;
5379         }
5380
5381         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5382                 (vha, atio->u.isp24.fcp_hdr.s_id);
5383         if (!sess)
5384                 return;
5385
5386         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5387         if (!cmd) {
5388                 ql_dbg(ql_dbg_io, vha, 0x3009,
5389                         "qla_target(%d): %s: Allocation of cmd failed\n",
5390                         vha->vp_idx, __func__);
5391
5392                 vha->hw->tgt.num_qfull_cmds_dropped++;
5393                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5394                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5395                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5396                                 vha->hw->tgt.num_qfull_cmds_dropped;
5397
5398                 qlt_chk_exch_leak_thresh_hold(vha);
5399                 return;
5400         }
5401
5402         qlt_incr_num_pend_cmds(vha);
5403         INIT_LIST_HEAD(&cmd->cmd_list);
5404         memcpy(&cmd->atio, atio, sizeof(*atio));
5405
5406         cmd->tgt = vha->vha_tgt.qla_tgt;
5407         cmd->vha = vha;
5408         cmd->reset_count = ha->base_qpair->chip_reset;
5409         cmd->q_full = 1;
5410         cmd->qpair = ha->base_qpair;
5411
5412         if (qfull) {
5413                 cmd->q_full = 1;
5414                 /* NOTE: borrowing the state field to carry the status */
5415                 cmd->state = status;
5416         } else
5417                 cmd->term_exchg = 1;
5418
5419         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5420         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5421
5422         vha->hw->tgt.num_qfull_cmds_alloc++;
5423         if (vha->hw->tgt.num_qfull_cmds_alloc >
5424                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5425                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5426                         vha->hw->tgt.num_qfull_cmds_alloc;
5427         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5428 }
5429
5430 int
5431 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5432 {
5433         struct scsi_qla_host *vha = qpair->vha;
5434         struct qla_hw_data *ha = vha->hw;
5435         unsigned long flags;
5436         struct qla_tgt_cmd *cmd, *tcmd;
5437         struct list_head free_list, q_full_list;
5438         int rc = 0;
5439
5440         if (list_empty(&ha->tgt.q_full_list))
5441                 return 0;
5442
5443         INIT_LIST_HEAD(&free_list);
5444         INIT_LIST_HEAD(&q_full_list);
5445
5446         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5447         if (list_empty(&ha->tgt.q_full_list)) {
5448                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5449                 return 0;
5450         }
5451
5452         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5453         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5454
5455         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5456         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5457                 if (cmd->q_full)
5458                         /* cmd->state is a borrowed field to hold status */
5459                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5460                 else if (cmd->term_exchg)
5461                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5462
5463                 if (rc == -ENOMEM)
5464                         break;
5465
5466                 if (cmd->q_full)
5467                         ql_dbg(ql_dbg_io, vha, 0x3006,
5468                             "%s: busy sent for ox_id[%04x]\n", __func__,
5469                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5470                 else if (cmd->term_exchg)
5471                         ql_dbg(ql_dbg_io, vha, 0x3007,
5472                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5473                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5474                 else
5475                         ql_dbg(ql_dbg_io, vha, 0x3008,
5476                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5477                             cmd);
5478
5479                 list_del(&cmd->cmd_list);
5480                 list_add_tail(&cmd->cmd_list, &free_list);
5481
5482                 /* piggy back on hardware_lock for protection */
5483                 vha->hw->tgt.num_qfull_cmds_alloc--;
5484         }
5485         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5486
5487         cmd = NULL;
5488
5489         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5490                 list_del(&cmd->cmd_list);
5491                 /* This cmd was never sent to TCM.  There is no need
5492                  * to schedule free or call free_cmd
5493                  */
5494                 qlt_free_cmd(cmd);
5495         }
5496
5497         if (!list_empty(&q_full_list)) {
5498                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5499                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5500                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5501         }
5502
5503         return rc;
5504 }
5505
5506 static void
5507 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5508     uint16_t status)
5509 {
5510         int rc = 0;
5511         struct scsi_qla_host *vha = qpair->vha;
5512
5513         rc = __qlt_send_busy(qpair, atio, status);
5514         if (rc == -ENOMEM)
5515                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5516 }
5517
5518 static int
5519 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5520         struct atio_from_isp *atio, uint8_t ha_locked)
5521 {
5522         struct qla_hw_data *ha = vha->hw;
5523         unsigned long flags;
5524
5525         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5526                 return 0;
5527
5528         if (!ha_locked)
5529                 spin_lock_irqsave(&ha->hardware_lock, flags);
5530         qlt_send_busy(qpair, atio, qla_sam_status);
5531         if (!ha_locked)
5532                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5533
5534         return 1;
5535 }
5536
5537 /* ha->hardware_lock supposed to be held on entry */
5538 /* called via callback from qla2xxx */
5539 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5540         struct atio_from_isp *atio, uint8_t ha_locked)
5541 {
5542         struct qla_hw_data *ha = vha->hw;
5543         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5544         int rc;
5545         unsigned long flags = 0;
5546
5547         if (unlikely(tgt == NULL)) {
5548                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5549                     "ATIO pkt, but no tgt (ha %p)", ha);
5550                 return;
5551         }
5552         /*
5553          * In tgt_stop mode we also should allow all requests to pass.
5554          * Otherwise, some commands can stuck.
5555          */
5556
5557         tgt->atio_irq_cmd_count++;
5558
5559         switch (atio->u.raw.entry_type) {
5560         case ATIO_TYPE7:
5561                 if (unlikely(atio->u.isp24.exchange_addr ==
5562                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5563                         ql_dbg(ql_dbg_io, vha, 0x3065,
5564                             "qla_target(%d): ATIO_TYPE7 "
5565                             "received with UNKNOWN exchange address, "
5566                             "sending QUEUE_FULL\n", vha->vp_idx);
5567                         if (!ha_locked)
5568                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5569                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5570                         if (!ha_locked)
5571                                 spin_unlock_irqrestore(&ha->hardware_lock,
5572                                     flags);
5573                         break;
5574                 }
5575
5576                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5577                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5578                             atio, ha_locked);
5579                         if (rc != 0) {
5580                                 tgt->atio_irq_cmd_count--;
5581                                 return;
5582                         }
5583                         rc = qlt_handle_cmd_for_atio(vha, atio);
5584                 } else {
5585                         rc = qlt_handle_task_mgmt(vha, atio);
5586                 }
5587                 if (unlikely(rc != 0)) {
5588                         if (!ha_locked)
5589                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5590                         switch (rc) {
5591                         case -ENODEV:
5592                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5593                                     "qla_target: Unable to send command to target\n");
5594                                 break;
5595                         case -EBADF:
5596                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5597                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5598                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5599                                     atio, 1, 0);
5600                                 break;
5601                         case -EBUSY:
5602                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5603                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5604                                     vha->vp_idx);
5605                                 qlt_send_busy(ha->base_qpair, atio,
5606                                     tc_sam_status);
5607                                 break;
5608                         default:
5609                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5610                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5611                                     vha->vp_idx);
5612                                 qlt_send_busy(ha->base_qpair, atio,
5613                                     qla_sam_status);
5614                                 break;
5615                         }
5616                         if (!ha_locked)
5617                                 spin_unlock_irqrestore(&ha->hardware_lock,
5618                                     flags);
5619                 }
5620                 break;
5621
5622         case IMMED_NOTIFY_TYPE:
5623         {
5624                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5625                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5626                             "qla_target(%d): Received ATIO packet %x "
5627                             "with error status %x\n", vha->vp_idx,
5628                             atio->u.raw.entry_type,
5629                             atio->u.isp2x.entry_status);
5630                         break;
5631                 }
5632                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5633
5634                 if (!ha_locked)
5635                         spin_lock_irqsave(&ha->hardware_lock, flags);
5636                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5637                 if (!ha_locked)
5638                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5639                 break;
5640         }
5641
5642         default:
5643                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5644                     "qla_target(%d): Received unknown ATIO atio "
5645                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5646                 break;
5647         }
5648
5649         tgt->atio_irq_cmd_count--;
5650 }
5651
5652 /*
5653  * qpair lock is assume to be held
5654  * rc = 0 : send terminate & abts respond
5655  * rc != 0: do not send term & abts respond
5656  */
5657 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5658     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5659 {
5660         struct qla_hw_data *ha = vha->hw;
5661         int rc = 0;
5662
5663         /*
5664          * Detect unresolved exchange. If the same ABTS is unable
5665          * to terminate an existing command and the same ABTS loops
5666          * between FW & Driver, then force FW dump. Under 1 jiff,
5667          * we should see multiple loops.
5668          */
5669         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5670             qpair->retry_term_jiff == jiffies) {
5671                 /* found existing exchange */
5672                 qpair->retry_term_cnt++;
5673                 if (qpair->retry_term_cnt >= 5) {
5674                         rc = -EIO;
5675                         qpair->retry_term_cnt = 0;
5676                         ql_log(ql_log_warn, vha, 0xffff,
5677                             "Unable to send ABTS Respond. Dumping firmware.\n");
5678                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5679                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5680
5681                         if (qpair == ha->base_qpair)
5682                                 ha->isp_ops->fw_dump(vha);
5683                         else
5684                                 qla2xxx_dump_fw(vha);
5685
5686                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5687                         qla2xxx_wake_dpc(vha);
5688                 }
5689         } else if (qpair->retry_term_jiff != jiffies) {
5690                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5691                 qpair->retry_term_cnt = 0;
5692                 qpair->retry_term_jiff = jiffies;
5693         }
5694
5695         return rc;
5696 }
5697
5698
5699 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5700         struct rsp_que *rsp, response_t *pkt)
5701 {
5702         struct abts_resp_from_24xx_fw *entry =
5703                 (struct abts_resp_from_24xx_fw *)pkt;
5704         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5705         struct qla_tgt_mgmt_cmd *mcmd;
5706         struct qla_hw_data *ha = vha->hw;
5707
5708         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5709         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5710                 ql_dbg(ql_dbg_async, vha, 0xe064,
5711                     "qla_target(%d): ABTS Comp without mcmd\n",
5712                     vha->vp_idx);
5713                 return;
5714         }
5715
5716         if (mcmd)
5717                 vha  = mcmd->vha;
5718         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5719
5720         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5721             "ABTS_RESP_24XX: compl_status %x\n",
5722             entry->compl_status);
5723
5724         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5725                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5726                     le32_to_cpu(entry->error_subcode2) == 0) {
5727                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5728                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5729                                 return;
5730                         }
5731                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5732                             pkt, mcmd);
5733                 } else {
5734                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5735                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5736                             vha->vp_idx, entry->compl_status,
5737                             entry->error_subcode1,
5738                             entry->error_subcode2);
5739                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5740                 }
5741         } else if (mcmd) {
5742                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5743         }
5744 }
5745
5746 /* ha->hardware_lock supposed to be held on entry */
5747 /* called via callback from qla2xxx */
5748 static void qlt_response_pkt(struct scsi_qla_host *vha,
5749         struct rsp_que *rsp, response_t *pkt)
5750 {
5751         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5752
5753         if (unlikely(tgt == NULL)) {
5754                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5755                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5756                     vha->vp_idx, pkt->entry_type, vha->hw);
5757                 return;
5758         }
5759
5760         /*
5761          * In tgt_stop mode we also should allow all requests to pass.
5762          * Otherwise, some commands can stuck.
5763          */
5764
5765         switch (pkt->entry_type) {
5766         case CTIO_CRC2:
5767         case CTIO_TYPE7:
5768         {
5769                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5770
5771                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5772                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5773                     entry);
5774                 break;
5775         }
5776
5777         case ACCEPT_TGT_IO_TYPE:
5778         {
5779                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5780                 int rc;
5781
5782                 if (atio->u.isp2x.status !=
5783                     cpu_to_le16(ATIO_CDB_VALID)) {
5784                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5785                             "qla_target(%d): ATIO with error "
5786                             "status %x received\n", vha->vp_idx,
5787                             le16_to_cpu(atio->u.isp2x.status));
5788                         break;
5789                 }
5790
5791                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5792                 if (rc != 0)
5793                         return;
5794
5795                 rc = qlt_handle_cmd_for_atio(vha, atio);
5796                 if (unlikely(rc != 0)) {
5797                         switch (rc) {
5798                         case -ENODEV:
5799                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5800                                     "qla_target: Unable to send command to target\n");
5801                                 break;
5802                         case -EBADF:
5803                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5804                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5805                                 qlt_send_term_exchange(rsp->qpair, NULL,
5806                                     atio, 1, 0);
5807                                 break;
5808                         case -EBUSY:
5809                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5810                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5811                                     vha->vp_idx);
5812                                 qlt_send_busy(rsp->qpair, atio,
5813                                     tc_sam_status);
5814                                 break;
5815                         default:
5816                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5817                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5818                                     vha->vp_idx);
5819                                 qlt_send_busy(rsp->qpair, atio,
5820                                     qla_sam_status);
5821                                 break;
5822                         }
5823                 }
5824         }
5825         break;
5826
5827         case CONTINUE_TGT_IO_TYPE:
5828         {
5829                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5830
5831                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5832                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5833                     entry);
5834                 break;
5835         }
5836
5837         case CTIO_A64_TYPE:
5838         {
5839                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5840
5841                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5842                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5843                     entry);
5844                 break;
5845         }
5846
5847         case IMMED_NOTIFY_TYPE:
5848                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5849                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5850                 break;
5851
5852         case NOTIFY_ACK_TYPE:
5853                 if (tgt->notify_ack_expected > 0) {
5854                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5855
5856                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5857                             "NOTIFY_ACK seq %08x status %x\n",
5858                             le16_to_cpu(entry->u.isp2x.seq_id),
5859                             le16_to_cpu(entry->u.isp2x.status));
5860                         tgt->notify_ack_expected--;
5861                         if (entry->u.isp2x.status !=
5862                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5863                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5864                                     "qla_target(%d): NOTIFY_ACK "
5865                                     "failed %x\n", vha->vp_idx,
5866                                     le16_to_cpu(entry->u.isp2x.status));
5867                         }
5868                 } else {
5869                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5870                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5871                             vha->vp_idx);
5872                 }
5873                 break;
5874
5875         case ABTS_RECV_24XX:
5876                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5877                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5878                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5879                 break;
5880
5881         case ABTS_RESP_24XX:
5882                 if (tgt->abts_resp_expected > 0) {
5883                         qlt_handle_abts_completion(vha, rsp, pkt);
5884                 } else {
5885                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5886                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5887                             "received\n", vha->vp_idx);
5888                 }
5889                 break;
5890
5891         default:
5892                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5893                     "qla_target(%d): Received unknown response pkt "
5894                     "type %x\n", vha->vp_idx, pkt->entry_type);
5895                 break;
5896         }
5897
5898 }
5899
5900 /*
5901  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5902  */
5903 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5904         uint16_t *mailbox)
5905 {
5906         struct qla_hw_data *ha = vha->hw;
5907         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5908         int login_code;
5909
5910         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5911                 return;
5912
5913         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5914             IS_QLA2100(ha))
5915                 return;
5916         /*
5917          * In tgt_stop mode we also should allow all requests to pass.
5918          * Otherwise, some commands can stuck.
5919          */
5920
5921
5922         switch (code) {
5923         case MBA_RESET:                 /* Reset */
5924         case MBA_SYSTEM_ERR:            /* System Error */
5925         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5926         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5927                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5928                     "qla_target(%d): System error async event %#x "
5929                     "occurred", vha->vp_idx, code);
5930                 break;
5931         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5932                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5933                 break;
5934
5935         case MBA_LOOP_UP:
5936         {
5937                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5938                     "qla_target(%d): Async LOOP_UP occurred "
5939                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5940                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5941                 if (tgt->link_reinit_iocb_pending) {
5942                         qlt_send_notify_ack(ha->base_qpair,
5943                             &tgt->link_reinit_iocb,
5944                             0, 0, 0, 0, 0, 0);
5945                         tgt->link_reinit_iocb_pending = 0;
5946                 }
5947                 break;
5948         }
5949
5950         case MBA_LIP_OCCURRED:
5951         case MBA_LOOP_DOWN:
5952         case MBA_LIP_RESET:
5953         case MBA_RSCN_UPDATE:
5954                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5955                     "qla_target(%d): Async event %#x occurred "
5956                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5957                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5958                 break;
5959
5960         case MBA_REJECTED_FCP_CMD:
5961                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5962                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5963                     vha->vp_idx,
5964                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5965
5966                 if (mailbox[3] == 1) {
5967                         /* exchange starvation. */
5968                         vha->hw->exch_starvation++;
5969                         if (vha->hw->exch_starvation > 5) {
5970                                 ql_log(ql_log_warn, vha, 0xd03a,
5971                                     "Exchange starvation-. Resetting RISC\n");
5972
5973                                 vha->hw->exch_starvation = 0;
5974                                 if (IS_P3P_TYPE(vha->hw))
5975                                         set_bit(FCOE_CTX_RESET_NEEDED,
5976                                             &vha->dpc_flags);
5977                                 else
5978                                         set_bit(ISP_ABORT_NEEDED,
5979                                             &vha->dpc_flags);
5980                                 qla2xxx_wake_dpc(vha);
5981                         }
5982                 }
5983                 break;
5984
5985         case MBA_PORT_UPDATE:
5986                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5987                     "qla_target(%d): Port update async event %#x "
5988                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5989                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5990                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5991
5992                 login_code = mailbox[2];
5993                 if (login_code == 0x4) {
5994                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5995                             "Async MB 2: Got PLOGI Complete\n");
5996                         vha->hw->exch_starvation = 0;
5997                 } else if (login_code == 0x7)
5998                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5999                             "Async MB 2: Port Logged Out\n");
6000                 break;
6001         default:
6002                 break;
6003         }
6004
6005 }
6006
6007 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6008         uint16_t loop_id)
6009 {
6010         fc_port_t *fcport, *tfcp, *del;
6011         int rc;
6012         unsigned long flags;
6013         u8 newfcport = 0;
6014
6015         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6016         if (!fcport) {
6017                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6018                     "qla_target(%d): Allocation of tmp FC port failed",
6019                     vha->vp_idx);
6020                 return NULL;
6021         }
6022
6023         fcport->loop_id = loop_id;
6024
6025         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6026         if (rc != QLA_SUCCESS) {
6027                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6028                     "qla_target(%d): Failed to retrieve fcport "
6029                     "information -- get_port_database() returned %x "
6030                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6031                 kfree(fcport);
6032                 return NULL;
6033         }
6034
6035         del = NULL;
6036         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6037         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6038
6039         if (tfcp) {
6040                 tfcp->d_id = fcport->d_id;
6041                 tfcp->port_type = fcport->port_type;
6042                 tfcp->supported_classes = fcport->supported_classes;
6043                 tfcp->flags |= fcport->flags;
6044                 tfcp->scan_state = QLA_FCPORT_FOUND;
6045
6046                 del = fcport;
6047                 fcport = tfcp;
6048         } else {
6049                 if (vha->hw->current_topology == ISP_CFG_F)
6050                         fcport->flags |= FCF_FABRIC_DEVICE;
6051
6052                 list_add_tail(&fcport->list, &vha->vp_fcports);
6053                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6054                    vha->fcport_count++;
6055                 fcport->login_gen++;
6056                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6057                 fcport->login_succ = 1;
6058                 newfcport = 1;
6059         }
6060
6061         fcport->deleted = 0;
6062         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6063
6064         switch (vha->host->active_mode) {
6065         case MODE_INITIATOR:
6066         case MODE_DUAL:
6067                 if (newfcport) {
6068                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6069                                 qla24xx_sched_upd_fcport(fcport);
6070                         } else {
6071                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6072                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6073                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6074                                 qla24xx_post_gpsc_work(vha, fcport);
6075                         }
6076                 }
6077                 break;
6078
6079         case MODE_TARGET:
6080         default:
6081                 break;
6082         }
6083         if (del)
6084                 qla2x00_free_fcport(del);
6085
6086         return fcport;
6087 }
6088
6089 /* Must be called under tgt_mutex */
6090 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6091                                            be_id_t s_id)
6092 {
6093         struct fc_port *sess = NULL;
6094         fc_port_t *fcport = NULL;
6095         int rc, global_resets;
6096         uint16_t loop_id = 0;
6097
6098         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6099                 /*
6100                  * This is Domain Controller, so it should be
6101                  * OK to drop SCSI commands from it.
6102                  */
6103                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6104                     "Unable to find initiator with S_ID %x:%x:%x",
6105                     s_id.domain, s_id.area, s_id.al_pa);
6106                 return NULL;
6107         }
6108
6109         mutex_lock(&vha->vha_tgt.tgt_mutex);
6110
6111 retry:
6112         global_resets =
6113             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6114
6115         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6116         if (rc != 0) {
6117                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6118
6119                 ql_log(ql_log_info, vha, 0xf071,
6120                     "qla_target(%d): Unable to find "
6121                     "initiator with S_ID %x:%x:%x",
6122                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6123
6124                 if (rc == -ENOENT) {
6125                         qlt_port_logo_t logo;
6126
6127                         logo.id = be_to_port_id(s_id);
6128                         logo.cmd_count = 1;
6129                         qlt_send_first_logo(vha, &logo);
6130                 }
6131
6132                 return NULL;
6133         }
6134
6135         fcport = qlt_get_port_database(vha, loop_id);
6136         if (!fcport) {
6137                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6138                 return NULL;
6139         }
6140
6141         if (global_resets !=
6142             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6143                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6144                     "qla_target(%d): global reset during session discovery "
6145                     "(counter was %d, new %d), retrying", vha->vp_idx,
6146                     global_resets,
6147                     atomic_read(&vha->vha_tgt.
6148                         qla_tgt->tgt_global_resets_count));
6149                 goto retry;
6150         }
6151
6152         sess = qlt_create_sess(vha, fcport, true);
6153
6154         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6155
6156         return sess;
6157 }
6158
6159 static void qlt_abort_work(struct qla_tgt *tgt,
6160         struct qla_tgt_sess_work_param *prm)
6161 {
6162         struct scsi_qla_host *vha = tgt->vha;
6163         struct qla_hw_data *ha = vha->hw;
6164         struct fc_port *sess = NULL;
6165         unsigned long flags = 0, flags2 = 0;
6166         be_id_t s_id;
6167         int rc;
6168
6169         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6170
6171         if (tgt->tgt_stop)
6172                 goto out_term2;
6173
6174         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6175
6176         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6177         if (!sess) {
6178                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6179
6180                 sess = qlt_make_local_sess(vha, s_id);
6181                 /* sess has got an extra creation ref */
6182
6183                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6184                 if (!sess)
6185                         goto out_term2;
6186         } else {
6187                 if (sess->deleted) {
6188                         sess = NULL;
6189                         goto out_term2;
6190                 }
6191
6192                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6193                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6194                             "%s: kref_get fail %8phC \n",
6195                              __func__, sess->port_name);
6196                         sess = NULL;
6197                         goto out_term2;
6198                 }
6199         }
6200
6201         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6202         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6203
6204         ha->tgt.tgt_ops->put_sess(sess);
6205
6206         if (rc != 0)
6207                 goto out_term;
6208         return;
6209
6210 out_term2:
6211         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6212
6213 out_term:
6214         spin_lock_irqsave(&ha->hardware_lock, flags);
6215         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6216             FCP_TMF_REJECTED, false);
6217         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6218 }
6219
6220 static void qlt_tmr_work(struct qla_tgt *tgt,
6221         struct qla_tgt_sess_work_param *prm)
6222 {
6223         struct atio_from_isp *a = &prm->tm_iocb2;
6224         struct scsi_qla_host *vha = tgt->vha;
6225         struct qla_hw_data *ha = vha->hw;
6226         struct fc_port *sess;
6227         unsigned long flags;
6228         be_id_t s_id;
6229         int rc;
6230         u64 unpacked_lun;
6231         int fn;
6232         void *iocb;
6233
6234         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6235
6236         if (tgt->tgt_stop)
6237                 goto out_term2;
6238
6239         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6240         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6241         if (!sess) {
6242                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6243
6244                 sess = qlt_make_local_sess(vha, s_id);
6245                 /* sess has got an extra creation ref */
6246
6247                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6248                 if (!sess)
6249                         goto out_term2;
6250         } else {
6251                 if (sess->deleted) {
6252                         goto out_term2;
6253                 }
6254
6255                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6256                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6257                             "%s: kref_get fail %8phC\n",
6258                              __func__, sess->port_name);
6259                         goto out_term2;
6260                 }
6261         }
6262
6263         iocb = a;
6264         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6265         unpacked_lun =
6266             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6267
6268         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6269         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6270
6271         ha->tgt.tgt_ops->put_sess(sess);
6272
6273         if (rc != 0)
6274                 goto out_term;
6275         return;
6276
6277 out_term2:
6278         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6279 out_term:
6280         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6281 }
6282
6283 static void qlt_sess_work_fn(struct work_struct *work)
6284 {
6285         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6286         struct scsi_qla_host *vha = tgt->vha;
6287         unsigned long flags;
6288
6289         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6290
6291         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6292         while (!list_empty(&tgt->sess_works_list)) {
6293                 struct qla_tgt_sess_work_param *prm = list_entry(
6294                     tgt->sess_works_list.next, typeof(*prm),
6295                     sess_works_list_entry);
6296
6297                 /*
6298                  * This work can be scheduled on several CPUs at time, so we
6299                  * must delete the entry to eliminate double processing
6300                  */
6301                 list_del(&prm->sess_works_list_entry);
6302
6303                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6304
6305                 switch (prm->type) {
6306                 case QLA_TGT_SESS_WORK_ABORT:
6307                         qlt_abort_work(tgt, prm);
6308                         break;
6309                 case QLA_TGT_SESS_WORK_TM:
6310                         qlt_tmr_work(tgt, prm);
6311                         break;
6312                 default:
6313                         BUG_ON(1);
6314                         break;
6315                 }
6316
6317                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6318
6319                 kfree(prm);
6320         }
6321         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6322 }
6323
6324 /* Must be called under tgt_host_action_mutex */
6325 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6326 {
6327         struct qla_tgt *tgt;
6328         int rc, i;
6329         struct qla_qpair_hint *h;
6330
6331         if (!QLA_TGT_MODE_ENABLED())
6332                 return 0;
6333
6334         if (!IS_TGT_MODE_CAPABLE(ha)) {
6335                 ql_log(ql_log_warn, base_vha, 0xe070,
6336                     "This adapter does not support target mode.\n");
6337                 return 0;
6338         }
6339
6340         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6341             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6342
6343         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6344
6345         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6346         if (!tgt) {
6347                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6348                     "Unable to allocate struct qla_tgt\n");
6349                 return -ENOMEM;
6350         }
6351
6352         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6353                                sizeof(struct qla_qpair_hint),
6354                                GFP_KERNEL);
6355         if (!tgt->qphints) {
6356                 kfree(tgt);
6357                 ql_log(ql_log_warn, base_vha, 0x0197,
6358                     "Unable to allocate qpair hints.\n");
6359                 return -ENOMEM;
6360         }
6361
6362         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6363                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6364
6365         rc = btree_init64(&tgt->lun_qpair_map);
6366         if (rc) {
6367                 kfree(tgt->qphints);
6368                 kfree(tgt);
6369                 ql_log(ql_log_info, base_vha, 0x0198,
6370                         "Unable to initialize lun_qpair_map btree\n");
6371                 return -EIO;
6372         }
6373         h = &tgt->qphints[0];
6374         h->qpair = ha->base_qpair;
6375         INIT_LIST_HEAD(&h->hint_elem);
6376         h->cpuid = ha->base_qpair->cpuid;
6377         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6378
6379         for (i = 0; i < ha->max_qpairs; i++) {
6380                 unsigned long flags;
6381
6382                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6383
6384                 h = &tgt->qphints[i + 1];
6385                 INIT_LIST_HEAD(&h->hint_elem);
6386                 if (qpair) {
6387                         h->qpair = qpair;
6388                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6389                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6390                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6391                         h->cpuid = qpair->cpuid;
6392                 }
6393         }
6394
6395         tgt->ha = ha;
6396         tgt->vha = base_vha;
6397         init_waitqueue_head(&tgt->waitQ);
6398         INIT_LIST_HEAD(&tgt->del_sess_list);
6399         spin_lock_init(&tgt->sess_work_lock);
6400         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6401         INIT_LIST_HEAD(&tgt->sess_works_list);
6402         atomic_set(&tgt->tgt_global_resets_count, 0);
6403
6404         base_vha->vha_tgt.qla_tgt = tgt;
6405
6406         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6407                 "qla_target(%d): using 64 Bit PCI addressing",
6408                 base_vha->vp_idx);
6409         /* 3 is reserved */
6410         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6411
6412         mutex_lock(&qla_tgt_mutex);
6413         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6414         mutex_unlock(&qla_tgt_mutex);
6415
6416         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6417                 ha->tgt.tgt_ops->add_target(base_vha);
6418
6419         return 0;
6420 }
6421
6422 /* Must be called under tgt_host_action_mutex */
6423 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6424 {
6425         if (!vha->vha_tgt.qla_tgt)
6426                 return 0;
6427
6428         if (vha->fc_vport) {
6429                 qlt_release(vha->vha_tgt.qla_tgt);
6430                 return 0;
6431         }
6432
6433         /* free left over qfull cmds */
6434         qlt_init_term_exchange(vha);
6435
6436         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6437             vha->host_no, ha);
6438         qlt_release(vha->vha_tgt.qla_tgt);
6439
6440         return 0;
6441 }
6442
6443 void qlt_remove_target_resources(struct qla_hw_data *ha)
6444 {
6445         struct scsi_qla_host *node;
6446         u32 key = 0;
6447
6448         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6449                 btree_remove32(&ha->tgt.host_map, key);
6450
6451         btree_destroy32(&ha->tgt.host_map);
6452 }
6453
6454 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6455         unsigned char *b)
6456 {
6457         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6458         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6459         put_unaligned_be64(wwpn, b);
6460         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6461 }
6462
6463 /**
6464  * qla_tgt_lport_register - register lport with external module
6465  *
6466  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6467  * @phys_wwpn: physical port WWPN
6468  * @npiv_wwpn: NPIV WWPN
6469  * @npiv_wwnn: NPIV WWNN
6470  * @callback:  lport initialization callback for tcm_qla2xxx code
6471  */
6472 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6473                        u64 npiv_wwpn, u64 npiv_wwnn,
6474                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6475 {
6476         struct qla_tgt *tgt;
6477         struct scsi_qla_host *vha;
6478         struct qla_hw_data *ha;
6479         struct Scsi_Host *host;
6480         unsigned long flags;
6481         int rc;
6482         u8 b[WWN_SIZE];
6483
6484         mutex_lock(&qla_tgt_mutex);
6485         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6486                 vha = tgt->vha;
6487                 ha = vha->hw;
6488
6489                 host = vha->host;
6490                 if (!host)
6491                         continue;
6492
6493                 if (!(host->hostt->supported_mode & MODE_TARGET))
6494                         continue;
6495
6496                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6497                         continue;
6498
6499                 spin_lock_irqsave(&ha->hardware_lock, flags);
6500                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6501                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6502                             host->host_no);
6503                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6504                         continue;
6505                 }
6506                 if (tgt->tgt_stop) {
6507                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6508                                  host->host_no);
6509                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6510                         continue;
6511                 }
6512                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6513
6514                 if (!scsi_host_get(host)) {
6515                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6516                             "Unable to scsi_host_get() for"
6517                             " qla2xxx scsi_host\n");
6518                         continue;
6519                 }
6520                 qlt_lport_dump(vha, phys_wwpn, b);
6521
6522                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6523                         scsi_host_put(host);
6524                         continue;
6525                 }
6526                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6527                 if (rc != 0)
6528                         scsi_host_put(host);
6529
6530                 mutex_unlock(&qla_tgt_mutex);
6531                 return rc;
6532         }
6533         mutex_unlock(&qla_tgt_mutex);
6534
6535         return -ENODEV;
6536 }
6537 EXPORT_SYMBOL(qlt_lport_register);
6538
6539 /**
6540  * qla_tgt_lport_deregister - Degister lport
6541  *
6542  * @vha:  Registered scsi_qla_host pointer
6543  */
6544 void qlt_lport_deregister(struct scsi_qla_host *vha)
6545 {
6546         struct qla_hw_data *ha = vha->hw;
6547         struct Scsi_Host *sh = vha->host;
6548         /*
6549          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6550          */
6551         vha->vha_tgt.target_lport_ptr = NULL;
6552         ha->tgt.tgt_ops = NULL;
6553         /*
6554          * Release the Scsi_Host reference for the underlying qla2xxx host
6555          */
6556         scsi_host_put(sh);
6557 }
6558 EXPORT_SYMBOL(qlt_lport_deregister);
6559
6560 /* Must be called under HW lock */
6561 void qlt_set_mode(struct scsi_qla_host *vha)
6562 {
6563         switch (vha->qlini_mode) {
6564         case QLA2XXX_INI_MODE_DISABLED:
6565         case QLA2XXX_INI_MODE_EXCLUSIVE:
6566                 vha->host->active_mode = MODE_TARGET;
6567                 break;
6568         case QLA2XXX_INI_MODE_ENABLED:
6569                 vha->host->active_mode = MODE_INITIATOR;
6570                 break;
6571         case QLA2XXX_INI_MODE_DUAL:
6572                 vha->host->active_mode = MODE_DUAL;
6573                 break;
6574         default:
6575                 break;
6576         }
6577 }
6578
6579 /* Must be called under HW lock */
6580 static void qlt_clear_mode(struct scsi_qla_host *vha)
6581 {
6582         switch (vha->qlini_mode) {
6583         case QLA2XXX_INI_MODE_DISABLED:
6584                 vha->host->active_mode = MODE_UNKNOWN;
6585                 break;
6586         case QLA2XXX_INI_MODE_EXCLUSIVE:
6587                 vha->host->active_mode = MODE_INITIATOR;
6588                 break;
6589         case QLA2XXX_INI_MODE_ENABLED:
6590         case QLA2XXX_INI_MODE_DUAL:
6591                 vha->host->active_mode = MODE_INITIATOR;
6592                 break;
6593         default:
6594                 break;
6595         }
6596 }
6597
6598 /*
6599  * qla_tgt_enable_vha - NO LOCK HELD
6600  *
6601  * host_reset, bring up w/ Target Mode Enabled
6602  */
6603 void
6604 qlt_enable_vha(struct scsi_qla_host *vha)
6605 {
6606         struct qla_hw_data *ha = vha->hw;
6607         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6608         unsigned long flags;
6609         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6610
6611         if (!tgt) {
6612                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6613                     "Unable to locate qla_tgt pointer from"
6614                     " struct qla_hw_data\n");
6615                 dump_stack();
6616                 return;
6617         }
6618         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6619                 return;
6620
6621         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6622                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6623         spin_lock_irqsave(&ha->hardware_lock, flags);
6624         tgt->tgt_stopped = 0;
6625         qlt_set_mode(vha);
6626         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6627
6628         mutex_lock(&ha->optrom_mutex);
6629         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6630             "%s.\n", __func__);
6631         if (vha->vp_idx) {
6632                 qla24xx_disable_vp(vha);
6633                 qla24xx_enable_vp(vha);
6634         } else {
6635                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6636                 qla2xxx_wake_dpc(base_vha);
6637                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6638                              QLA_SUCCESS);
6639         }
6640         mutex_unlock(&ha->optrom_mutex);
6641 }
6642 EXPORT_SYMBOL(qlt_enable_vha);
6643
6644 /*
6645  * qla_tgt_disable_vha - NO LOCK HELD
6646  *
6647  * Disable Target Mode and reset the adapter
6648  */
6649 static void qlt_disable_vha(struct scsi_qla_host *vha)
6650 {
6651         struct qla_hw_data *ha = vha->hw;
6652         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6653         unsigned long flags;
6654
6655         if (!tgt) {
6656                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6657                     "Unable to locate qla_tgt pointer from"
6658                     " struct qla_hw_data\n");
6659                 dump_stack();
6660                 return;
6661         }
6662
6663         spin_lock_irqsave(&ha->hardware_lock, flags);
6664         qlt_clear_mode(vha);
6665         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6666
6667         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6668         qla2xxx_wake_dpc(vha);
6669
6670         /*
6671          * We are expecting the offline state.
6672          * QLA_FUNCTION_FAILED means that adapter is offline.
6673          */
6674         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6675                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6676                        "adapter is offline\n");
6677 }
6678
6679 /*
6680  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6681  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6682  * members.
6683  */
6684 void
6685 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6686 {
6687         vha->vha_tgt.qla_tgt = NULL;
6688
6689         mutex_init(&vha->vha_tgt.tgt_mutex);
6690         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6691
6692         qlt_clear_mode(vha);
6693
6694         /*
6695          * NOTE: Currently the value is kept the same for <24xx and
6696          * >=24xx ISPs. If it is necessary to change it,
6697          * the check should be added for specific ISPs,
6698          * assigning the value appropriately.
6699          */
6700         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6701
6702         qlt_add_target(ha, vha);
6703 }
6704
6705 u8
6706 qlt_rff_id(struct scsi_qla_host *vha)
6707 {
6708         u8 fc4_feature = 0;
6709         /*
6710          * FC-4 Feature bit 0 indicates target functionality to the name server.
6711          */
6712         if (qla_tgt_mode_enabled(vha)) {
6713                 fc4_feature = BIT_0;
6714         } else if (qla_ini_mode_enabled(vha)) {
6715                 fc4_feature = BIT_1;
6716         } else if (qla_dual_mode_enabled(vha))
6717                 fc4_feature = BIT_0 | BIT_1;
6718
6719         return fc4_feature;
6720 }
6721
6722 /*
6723  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6724  * @ha: HA context
6725  *
6726  * Beginning of ATIO ring has initialization control block already built
6727  * by nvram config routine.
6728  *
6729  * Returns 0 on success.
6730  */
6731 void
6732 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6733 {
6734         struct qla_hw_data *ha = vha->hw;
6735         uint16_t cnt;
6736         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6737
6738         if (qla_ini_mode_enabled(vha))
6739                 return;
6740
6741         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6742                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6743                 pkt++;
6744         }
6745
6746 }
6747
6748 /*
6749  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6750  * @ha: SCSI driver HA context
6751  */
6752 void
6753 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6754 {
6755         struct qla_hw_data *ha = vha->hw;
6756         struct atio_from_isp *pkt;
6757         int cnt, i;
6758
6759         if (!ha->flags.fw_started)
6760                 return;
6761
6762         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6763             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6764                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6765                 cnt = pkt->u.raw.entry_count;
6766
6767                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6768                         /*
6769                          * This packet is corrupted. The header + payload
6770                          * can not be trusted. There is no point in passing
6771                          * it further up.
6772                          */
6773                         ql_log(ql_log_warn, vha, 0xd03c,
6774                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6775                             &pkt->u.isp24.fcp_hdr.s_id,
6776                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6777                             pkt->u.isp24.exchange_addr, pkt);
6778
6779                         adjust_corrupted_atio(pkt);
6780                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6781                             ha_locked, 0);
6782                 } else {
6783                         qlt_24xx_atio_pkt_all_vps(vha,
6784                             (struct atio_from_isp *)pkt, ha_locked);
6785                 }
6786
6787                 for (i = 0; i < cnt; i++) {
6788                         ha->tgt.atio_ring_index++;
6789                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6790                                 ha->tgt.atio_ring_index = 0;
6791                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6792                         } else
6793                                 ha->tgt.atio_ring_ptr++;
6794
6795                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6796                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6797                 }
6798                 wmb();
6799         }
6800
6801         /* Adjust ring index */
6802         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6803 }
6804
6805 void
6806 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6807 {
6808         struct qla_hw_data *ha = vha->hw;
6809         struct qla_msix_entry *msix = &ha->msix_entries[2];
6810         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6811
6812         if (!QLA_TGT_MODE_ENABLED())
6813                 return;
6814
6815         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6816         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6817         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6818
6819         if (ha->flags.msix_enabled) {
6820                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6821                         if (IS_QLA2071(ha)) {
6822                                 /* 4 ports Baker: Enable Interrupt Handshake */
6823                                 icb->msix_atio = 0;
6824                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6825                         } else {
6826                                 icb->msix_atio = cpu_to_le16(msix->entry);
6827                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6828                         }
6829                         ql_dbg(ql_dbg_init, vha, 0xf072,
6830                             "Registering ICB vector 0x%x for atio que.\n",
6831                             msix->entry);
6832                 }
6833         } else {
6834                 /* INTx|MSI */
6835                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6836                         icb->msix_atio = 0;
6837                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6838                         ql_dbg(ql_dbg_init, vha, 0xf072,
6839                             "%s: Use INTx for ATIOQ.\n", __func__);
6840                 }
6841         }
6842 }
6843
6844 void
6845 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6846 {
6847         struct qla_hw_data *ha = vha->hw;
6848         u32 tmp;
6849
6850         if (!QLA_TGT_MODE_ENABLED())
6851                 return;
6852
6853         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6854                 if (!ha->tgt.saved_set) {
6855                         /* We save only once */
6856                         ha->tgt.saved_exchange_count = nv->exchange_count;
6857                         ha->tgt.saved_firmware_options_1 =
6858                             nv->firmware_options_1;
6859                         ha->tgt.saved_firmware_options_2 =
6860                             nv->firmware_options_2;
6861                         ha->tgt.saved_firmware_options_3 =
6862                             nv->firmware_options_3;
6863                         ha->tgt.saved_set = 1;
6864                 }
6865
6866                 if (qla_tgt_mode_enabled(vha))
6867                         nv->exchange_count = cpu_to_le16(0xFFFF);
6868                 else                    /* dual */
6869                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6870
6871                 /* Enable target mode */
6872                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6873
6874                 /* Disable ini mode, if requested */
6875                 if (qla_tgt_mode_enabled(vha))
6876                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6877
6878                 /* Disable Full Login after LIP */
6879                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6880                 /* Enable initial LIP */
6881                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6882                 if (ql2xtgt_tape_enable)
6883                         /* Enable FC Tape support */
6884                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6885                 else
6886                         /* Disable FC Tape support */
6887                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6888
6889                 /* Disable Full Login after LIP */
6890                 nv->host_p &= cpu_to_le32(~BIT_10);
6891
6892                 /*
6893                  * clear BIT 15 explicitly as we have seen at least
6894                  * a couple of instances where this was set and this
6895                  * was causing the firmware to not be initialized.
6896                  */
6897                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6898                 /* Enable target PRLI control */
6899                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6900
6901                 if (IS_QLA25XX(ha)) {
6902                         /* Change Loop-prefer to Pt-Pt */
6903                         tmp = ~(BIT_4|BIT_5|BIT_6);
6904                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6905                         tmp = P2P << 4;
6906                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6907                 }
6908         } else {
6909                 if (ha->tgt.saved_set) {
6910                         nv->exchange_count = ha->tgt.saved_exchange_count;
6911                         nv->firmware_options_1 =
6912                             ha->tgt.saved_firmware_options_1;
6913                         nv->firmware_options_2 =
6914                             ha->tgt.saved_firmware_options_2;
6915                         nv->firmware_options_3 =
6916                             ha->tgt.saved_firmware_options_3;
6917                 }
6918                 return;
6919         }
6920
6921         if (ha->base_qpair->enable_class_2) {
6922                 if (vha->flags.init_done)
6923                         fc_host_supported_classes(vha->host) =
6924                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6925
6926                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6927         } else {
6928                 if (vha->flags.init_done)
6929                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6930
6931                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6932         }
6933 }
6934
6935 void
6936 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6937         struct init_cb_24xx *icb)
6938 {
6939         struct qla_hw_data *ha = vha->hw;
6940
6941         if (!QLA_TGT_MODE_ENABLED())
6942                 return;
6943
6944         if (ha->tgt.node_name_set) {
6945                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6946                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6947         }
6948 }
6949
6950 void
6951 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6952 {
6953         struct qla_hw_data *ha = vha->hw;
6954         u32 tmp;
6955
6956         if (!QLA_TGT_MODE_ENABLED())
6957                 return;
6958
6959         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6960                 if (!ha->tgt.saved_set) {
6961                         /* We save only once */
6962                         ha->tgt.saved_exchange_count = nv->exchange_count;
6963                         ha->tgt.saved_firmware_options_1 =
6964                             nv->firmware_options_1;
6965                         ha->tgt.saved_firmware_options_2 =
6966                             nv->firmware_options_2;
6967                         ha->tgt.saved_firmware_options_3 =
6968                             nv->firmware_options_3;
6969                         ha->tgt.saved_set = 1;
6970                 }
6971
6972                 if (qla_tgt_mode_enabled(vha))
6973                         nv->exchange_count = cpu_to_le16(0xFFFF);
6974                 else                    /* dual */
6975                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6976
6977                 /* Enable target mode */
6978                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6979
6980                 /* Disable ini mode, if requested */
6981                 if (qla_tgt_mode_enabled(vha))
6982                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6983                 /* Disable Full Login after LIP */
6984                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6985                 /* Enable initial LIP */
6986                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6987                 /*
6988                  * clear BIT 15 explicitly as we have seen at
6989                  * least a couple of instances where this was set
6990                  * and this was causing the firmware to not be
6991                  * initialized.
6992                  */
6993                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6994                 if (ql2xtgt_tape_enable)
6995                         /* Enable FC tape support */
6996                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6997                 else
6998                         /* Disable FC tape support */
6999                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7000
7001                 /* Disable Full Login after LIP */
7002                 nv->host_p &= cpu_to_le32(~BIT_10);
7003                 /* Enable target PRLI control */
7004                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7005
7006                 /* Change Loop-prefer to Pt-Pt */
7007                 tmp = ~(BIT_4|BIT_5|BIT_6);
7008                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7009                 tmp = P2P << 4;
7010                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7011         } else {
7012                 if (ha->tgt.saved_set) {
7013                         nv->exchange_count = ha->tgt.saved_exchange_count;
7014                         nv->firmware_options_1 =
7015                             ha->tgt.saved_firmware_options_1;
7016                         nv->firmware_options_2 =
7017                             ha->tgt.saved_firmware_options_2;
7018                         nv->firmware_options_3 =
7019                             ha->tgt.saved_firmware_options_3;
7020                 }
7021                 return;
7022         }
7023
7024         if (ha->base_qpair->enable_class_2) {
7025                 if (vha->flags.init_done)
7026                         fc_host_supported_classes(vha->host) =
7027                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7028
7029                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7030         } else {
7031                 if (vha->flags.init_done)
7032                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7033
7034                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7035         }
7036 }
7037
7038 void
7039 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7040         struct init_cb_81xx *icb)
7041 {
7042         struct qla_hw_data *ha = vha->hw;
7043
7044         if (!QLA_TGT_MODE_ENABLED())
7045                 return;
7046
7047         if (ha->tgt.node_name_set) {
7048                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7049                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7050         }
7051 }
7052
7053 void
7054 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7055 {
7056         if (!QLA_TGT_MODE_ENABLED())
7057                 return;
7058
7059         ha->msix_count += 1; /* For ATIO Q */
7060 }
7061
7062
7063 void
7064 qlt_modify_vp_config(struct scsi_qla_host *vha,
7065         struct vp_config_entry_24xx *vpmod)
7066 {
7067         /* enable target mode.  Bit5 = 1 => disable */
7068         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7069                 vpmod->options_idx1 &= ~BIT_5;
7070
7071         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7072         if (qla_tgt_mode_enabled(vha))
7073                 vpmod->options_idx1 &= ~BIT_4;
7074 }
7075
7076 void
7077 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7078 {
7079         int rc;
7080
7081         if (!QLA_TGT_MODE_ENABLED())
7082                 return;
7083
7084         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7085             IS_QLA28XX(ha)) {
7086                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7087                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7088         } else {
7089                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7090                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7091         }
7092
7093         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7094         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7095
7096         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7097         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7098             qlt_unknown_atio_work_fn);
7099
7100         qlt_clear_mode(base_vha);
7101
7102         rc = btree_init32(&ha->tgt.host_map);
7103         if (rc)
7104                 ql_log(ql_log_info, base_vha, 0xd03d,
7105                     "Unable to initialize ha->host_map btree\n");
7106
7107         qlt_update_vp_map(base_vha, SET_VP_IDX);
7108 }
7109
7110 irqreturn_t
7111 qla83xx_msix_atio_q(int irq, void *dev_id)
7112 {
7113         struct rsp_que *rsp;
7114         scsi_qla_host_t *vha;
7115         struct qla_hw_data *ha;
7116         unsigned long flags;
7117
7118         rsp = (struct rsp_que *) dev_id;
7119         ha = rsp->hw;
7120         vha = pci_get_drvdata(ha->pdev);
7121
7122         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7123
7124         qlt_24xx_process_atio_queue(vha, 0);
7125
7126         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7127
7128         return IRQ_HANDLED;
7129 }
7130
7131 static void
7132 qlt_handle_abts_recv_work(struct work_struct *work)
7133 {
7134         struct qla_tgt_sess_op *op = container_of(work,
7135                 struct qla_tgt_sess_op, work);
7136         scsi_qla_host_t *vha = op->vha;
7137         struct qla_hw_data *ha = vha->hw;
7138         unsigned long flags;
7139
7140         if (qla2x00_reset_active(vha) ||
7141             (op->chip_reset != ha->base_qpair->chip_reset))
7142                 return;
7143
7144         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7145         qlt_24xx_process_atio_queue(vha, 0);
7146         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7147
7148         spin_lock_irqsave(&ha->hardware_lock, flags);
7149         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7150         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7151
7152         kfree(op);
7153 }
7154
7155 void
7156 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7157     response_t *pkt)
7158 {
7159         struct qla_tgt_sess_op *op;
7160
7161         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7162
7163         if (!op) {
7164                 /* do not reach for ATIO queue here.  This is best effort err
7165                  * recovery at this point.
7166                  */
7167                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7168                 return;
7169         }
7170
7171         memcpy(&op->atio, pkt, sizeof(*pkt));
7172         op->vha = vha;
7173         op->chip_reset = vha->hw->base_qpair->chip_reset;
7174         op->rsp = rsp;
7175         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7176         queue_work(qla_tgt_wq, &op->work);
7177         return;
7178 }
7179
7180 int
7181 qlt_mem_alloc(struct qla_hw_data *ha)
7182 {
7183         if (!QLA_TGT_MODE_ENABLED())
7184                 return 0;
7185
7186         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7187                                      sizeof(struct qla_tgt_vp_map),
7188                                      GFP_KERNEL);
7189         if (!ha->tgt.tgt_vp_map)
7190                 return -ENOMEM;
7191
7192         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7193             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7194             &ha->tgt.atio_dma, GFP_KERNEL);
7195         if (!ha->tgt.atio_ring) {
7196                 kfree(ha->tgt.tgt_vp_map);
7197                 return -ENOMEM;
7198         }
7199         return 0;
7200 }
7201
7202 void
7203 qlt_mem_free(struct qla_hw_data *ha)
7204 {
7205         if (!QLA_TGT_MODE_ENABLED())
7206                 return;
7207
7208         if (ha->tgt.atio_ring) {
7209                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7210                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7211                     ha->tgt.atio_dma);
7212         }
7213         ha->tgt.atio_ring = NULL;
7214         ha->tgt.atio_dma = 0;
7215         kfree(ha->tgt.tgt_vp_map);
7216         ha->tgt.tgt_vp_map = NULL;
7217 }
7218
7219 /* vport_slock to be held by the caller */
7220 void
7221 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7222 {
7223         void *slot;
7224         u32 key;
7225         int rc;
7226
7227         if (!QLA_TGT_MODE_ENABLED())
7228                 return;
7229
7230         key = vha->d_id.b24;
7231
7232         switch (cmd) {
7233         case SET_VP_IDX:
7234                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7235                 break;
7236         case SET_AL_PA:
7237                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7238                 if (!slot) {
7239                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7240                             "Save vha in host_map %p %06x\n", vha, key);
7241                         rc = btree_insert32(&vha->hw->tgt.host_map,
7242                                 key, vha, GFP_ATOMIC);
7243                         if (rc)
7244                                 ql_log(ql_log_info, vha, 0xd03e,
7245                                     "Unable to insert s_id into host_map: %06x\n",
7246                                     key);
7247                         return;
7248                 }
7249                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7250                     "replace existing vha in host_map %p %06x\n", vha, key);
7251                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7252                 break;
7253         case RESET_VP_IDX:
7254                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7255                 break;
7256         case RESET_AL_PA:
7257                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7258                    "clear vha in host_map %p %06x\n", vha, key);
7259                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7260                 if (slot)
7261                         btree_remove32(&vha->hw->tgt.host_map, key);
7262                 vha->d_id.b24 = 0;
7263                 break;
7264         }
7265 }
7266
7267 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7268 {
7269
7270         if (!vha->d_id.b24) {
7271                 vha->d_id = id;
7272                 qlt_update_vp_map(vha, SET_AL_PA);
7273         } else if (vha->d_id.b24 != id.b24) {
7274                 qlt_update_vp_map(vha, RESET_AL_PA);
7275                 vha->d_id = id;
7276                 qlt_update_vp_map(vha, SET_AL_PA);
7277         }
7278 }
7279
7280 static int __init qlt_parse_ini_mode(void)
7281 {
7282         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7283                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7284         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7285                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7286         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7287                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7288         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7289                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7290         else
7291                 return false;
7292
7293         return true;
7294 }
7295
7296 int __init qlt_init(void)
7297 {
7298         int ret;
7299
7300         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7301         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7302
7303         if (!qlt_parse_ini_mode()) {
7304                 ql_log(ql_log_fatal, NULL, 0xe06b,
7305                     "qlt_parse_ini_mode() failed\n");
7306                 return -EINVAL;
7307         }
7308
7309         if (!QLA_TGT_MODE_ENABLED())
7310                 return 0;
7311
7312         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7313             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7314             qla_tgt_mgmt_cmd), 0, NULL);
7315         if (!qla_tgt_mgmt_cmd_cachep) {
7316                 ql_log(ql_log_fatal, NULL, 0xd04b,
7317                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7318                 return -ENOMEM;
7319         }
7320
7321         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7322             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7323             0, NULL);
7324
7325         if (!qla_tgt_plogi_cachep) {
7326                 ql_log(ql_log_fatal, NULL, 0xe06d,
7327                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7328                 ret = -ENOMEM;
7329                 goto out_mgmt_cmd_cachep;
7330         }
7331
7332         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7333             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7334         if (!qla_tgt_mgmt_cmd_mempool) {
7335                 ql_log(ql_log_fatal, NULL, 0xe06e,
7336                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7337                 ret = -ENOMEM;
7338                 goto out_plogi_cachep;
7339         }
7340
7341         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7342         if (!qla_tgt_wq) {
7343                 ql_log(ql_log_fatal, NULL, 0xe06f,
7344                     "alloc_workqueue for qla_tgt_wq failed\n");
7345                 ret = -ENOMEM;
7346                 goto out_cmd_mempool;
7347         }
7348         /*
7349          * Return 1 to signal that initiator-mode is being disabled
7350          */
7351         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7352
7353 out_cmd_mempool:
7354         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7355 out_plogi_cachep:
7356         kmem_cache_destroy(qla_tgt_plogi_cachep);
7357 out_mgmt_cmd_cachep:
7358         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7359         return ret;
7360 }
7361
7362 void qlt_exit(void)
7363 {
7364         if (!QLA_TGT_MODE_ENABLED())
7365                 return;
7366
7367         destroy_workqueue(qla_tgt_wq);
7368         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7369         kmem_cache_destroy(qla_tgt_plogi_cachep);
7370         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7371 }