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->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 985                                 rc = qla2x00_post_async_logout_work(vha, sess,
 986                                     NULL);
 987                                 if (rc != QLA_SUCCESS)
 988                                         ql_log(ql_log_warn, vha, 0xf085,
 989                                             "Schedule logo failed sess %p rc %d\n",
 990                                             sess, rc);
 991                                 else
 992                                         logout_started = true;
 993                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 994                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 995                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 996                                     NULL);
 997                                 if (rc != QLA_SUCCESS)
 998                                         ql_log(ql_log_warn, vha, 0xf085,
 999                                             "Schedule PRLO failed sess %p rc %d\n",
1000                                             sess, rc);
1001                                 else
1002                                         logout_started = true;
1003                         }
1004                 } /* if sess->logout_on_delete */
1005
1006                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1007                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1008                         sess->nvme_flag |= NVME_FLAG_DELETING;
1009                         qla_nvme_unregister_remote_port(sess);
1010                 }
1011         }
1012
1013         /*
1014          * Release the target session for FC Nexus from fabric module code.
1015          */
1016         if (sess->se_sess != NULL)
1017                 ha->tgt.tgt_ops->free_session(sess);
1018
1019         if (logout_started) {
1020                 bool traced = false;
1021                 u16 cnt = 0;
1022
1023                 while (!READ_ONCE(sess->logout_completed)) {
1024                         if (!traced) {
1025                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1026                                         "%s: waiting for sess %p logout\n",
1027                                         __func__, sess);
1028                                 traced = true;
1029                         }
1030                         msleep(100);
1031                         cnt++;
1032                         if (cnt > 200)
1033                                 break;
1034                 }
1035
1036                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1037                     "%s: sess %p logout completed\n", __func__, sess);
1038         }
1039
1040         if (sess->logo_ack_needed) {
1041                 sess->logo_ack_needed = 0;
1042                 qla24xx_async_notify_ack(vha, sess,
1043                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1044         }
1045
1046         spin_lock_irqsave(&vha->work_lock, flags);
1047         sess->flags &= ~FCF_ASYNC_SENT;
1048         spin_unlock_irqrestore(&vha->work_lock, flags);
1049
1050         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1051         if (sess->se_sess) {
1052                 sess->se_sess = NULL;
1053                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1054                         tgt->sess_count--;
1055         }
1056
1057         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1058         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1059         sess->deleted = QLA_SESS_DELETED;
1060
1061         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1062                 vha->fcport_count--;
1063                 sess->login_succ = 0;
1064         }
1065
1066         qla2x00_clear_loop_id(sess);
1067
1068         if (sess->conflict) {
1069                 sess->conflict->login_pause = 0;
1070                 sess->conflict = NULL;
1071                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1072                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1073         }
1074
1075         {
1076                 struct qlt_plogi_ack_t *con =
1077                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1078                 struct imm_ntfy_from_isp *iocb;
1079
1080                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1081
1082                 if (con) {
1083                         iocb = &con->iocb;
1084                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1085                                  "se_sess %p / sess %p port %8phC is gone,"
1086                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1087                                  sess->se_sess, sess, sess->port_name,
1088                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1089                                  own ? own->ref_count : -1,
1090                                  iocb->u.isp24.port_name, con->ref_count);
1091                         qlt_plogi_ack_unref(vha, con);
1092                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1093                 } else {
1094                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1095                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1096                             sess->se_sess, sess, sess->port_name,
1097                             own ? "releasing own PLOGI" :
1098                             "no own PLOGI pending",
1099                             own ? own->ref_count : -1);
1100                 }
1101
1102                 if (own) {
1103                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1104                         qlt_plogi_ack_unref(vha, own);
1105                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1106                 }
1107         }
1108
1109         sess->explicit_logout = 0;
1110         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1111         sess->free_pending = 0;
1112
1113         qla2x00_dfs_remove_rport(vha, sess);
1114
1115         ql_dbg(ql_dbg_disc, vha, 0xf001,
1116             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1117                 sess, sess->port_name, vha->fcport_count);
1118
1119         if (tgt && (tgt->sess_count == 0))
1120                 wake_up_all(&tgt->waitQ);
1121
1122         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1123             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1124             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1125                 switch (vha->host->active_mode) {
1126                 case MODE_INITIATOR:
1127                 case MODE_DUAL:
1128                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1129                         qla2xxx_wake_dpc(vha);
1130                         break;
1131                 case MODE_TARGET:
1132                 default:
1133                         /* no-op */
1134                         break;
1135                 }
1136         }
1137
1138         if (vha->fcport_count == 0)
1139                 wake_up_all(&vha->fcport_waitQ);
1140 }
1141
1142 /* ha->tgt.sess_lock supposed to be held on entry */
1143 void qlt_unreg_sess(struct fc_port *sess)
1144 {
1145         struct scsi_qla_host *vha = sess->vha;
1146         unsigned long flags;
1147
1148         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1149             "%s sess %p for deletion %8phC\n",
1150             __func__, sess, sess->port_name);
1151
1152         spin_lock_irqsave(&sess->vha->work_lock, flags);
1153         if (sess->free_pending) {
1154                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1155                 return;
1156         }
1157         sess->free_pending = 1;
1158         /*
1159          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1160          * management from being sent.
1161          */
1162         sess->flags |= FCF_ASYNC_SENT;
1163         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1164
1165         if (sess->se_sess)
1166                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1167
1168         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1169         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1170         sess->last_rscn_gen = sess->rscn_gen;
1171         sess->last_login_gen = sess->login_gen;
1172
1173         queue_work(sess->vha->hw->wq, &sess->free_work);
1174 }
1175 EXPORT_SYMBOL(qlt_unreg_sess);
1176
1177 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1178 {
1179         struct qla_hw_data *ha = vha->hw;
1180         struct fc_port *sess = NULL;
1181         uint16_t loop_id;
1182         int res = 0;
1183         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1184         unsigned long flags;
1185
1186         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1187         if (loop_id == 0xFFFF) {
1188                 /* Global event */
1189                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1190                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1191                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1192                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1193         } else {
1194                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1195                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1196                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1197         }
1198
1199         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1200             "Using sess for qla_tgt_reset: %p\n", sess);
1201         if (!sess) {
1202                 res = -ESRCH;
1203                 return res;
1204         }
1205
1206         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1207             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1208             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1209             mcmd, loop_id);
1210
1211         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1212 }
1213
1214 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1215 {
1216         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1217                 sess->logout_on_delete = 0;
1218                 sess->logo_ack_needed = 0;
1219                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1220         }
1221 }
1222
1223 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1224 {
1225         struct qla_tgt *tgt = sess->tgt;
1226         unsigned long flags;
1227         u16 sec;
1228
1229         switch (sess->disc_state) {
1230         case DSC_DELETE_PEND:
1231                 return;
1232         case DSC_DELETED:
1233                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1234                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1235                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1236                                 wake_up_all(&tgt->waitQ);
1237
1238                         if (sess->vha->fcport_count == 0)
1239                                 wake_up_all(&sess->vha->fcport_waitQ);
1240                         return;
1241                 }
1242                 break;
1243         case DSC_UPD_FCPORT:
1244                 /*
1245                  * This port is not done reporting to upper layer.
1246                  * let it finish
1247                  */
1248                 sess->next_disc_state = DSC_DELETE_PEND;
1249                 sec = jiffies_to_msecs(jiffies -
1250                     sess->jiffies_at_registration)/1000;
1251                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1252                         sess->sec_since_registration = sec;
1253                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1254                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1255                             __func__, sess->port_name, sec);
1256                 }
1257                 return;
1258         default:
1259                 break;
1260         }
1261
1262         spin_lock_irqsave(&sess->vha->work_lock, flags);
1263         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1264                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1265                 return;
1266         }
1267         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1268         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1269
1270         sess->prli_pend_timer = 0;
1271         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1272
1273         qla24xx_chk_fcp_state(sess);
1274
1275         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1276             "Scheduling sess %p for deletion %8phC\n",
1277             sess, sess->port_name);
1278
1279         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1280 }
1281
1282 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1283 {
1284         struct fc_port *sess;
1285         scsi_qla_host_t *vha = tgt->vha;
1286
1287         list_for_each_entry(sess, &vha->vp_fcports, list) {
1288                 if (sess->se_sess)
1289                         qlt_schedule_sess_for_deletion(sess);
1290         }
1291
1292         /* At this point tgt could be already dead */
1293 }
1294
1295 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1296         uint16_t *loop_id)
1297 {
1298         struct qla_hw_data *ha = vha->hw;
1299         dma_addr_t gid_list_dma;
1300         struct gid_list_info *gid_list, *gid;
1301         int res, rc, i;
1302         uint16_t entries;
1303
1304         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1305             &gid_list_dma, GFP_KERNEL);
1306         if (!gid_list) {
1307                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1308                     "qla_target(%d): DMA Alloc failed of %u\n",
1309                     vha->vp_idx, qla2x00_gid_list_size(ha));
1310                 return -ENOMEM;
1311         }
1312
1313         /* Get list of logged in devices */
1314         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1315         if (rc != QLA_SUCCESS) {
1316                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1317                     "qla_target(%d): get_id_list() failed: %x\n",
1318                     vha->vp_idx, rc);
1319                 res = -EBUSY;
1320                 goto out_free_id_list;
1321         }
1322
1323         gid = gid_list;
1324         res = -ENOENT;
1325         for (i = 0; i < entries; i++) {
1326                 if (gid->al_pa == s_id.al_pa &&
1327                     gid->area == s_id.area &&
1328                     gid->domain == s_id.domain) {
1329                         *loop_id = le16_to_cpu(gid->loop_id);
1330                         res = 0;
1331                         break;
1332                 }
1333                 gid = (void *)gid + ha->gid_list_info_size;
1334         }
1335
1336 out_free_id_list:
1337         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1338             gid_list, gid_list_dma);
1339         return res;
1340 }
1341
1342 /*
1343  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1344  * Caller must put it.
1345  */
1346 static struct fc_port *qlt_create_sess(
1347         struct scsi_qla_host *vha,
1348         fc_port_t *fcport,
1349         bool local)
1350 {
1351         struct qla_hw_data *ha = vha->hw;
1352         struct fc_port *sess = fcport;
1353         unsigned long flags;
1354
1355         if (vha->vha_tgt.qla_tgt->tgt_stop)
1356                 return NULL;
1357
1358         if (fcport->se_sess) {
1359                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1360                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1361                             "%s: kref_get_unless_zero failed for %8phC\n",
1362                             __func__, sess->port_name);
1363                         return NULL;
1364                 }
1365                 return fcport;
1366         }
1367         sess->tgt = vha->vha_tgt.qla_tgt;
1368         sess->local = local;
1369
1370         /*
1371          * Under normal circumstances we want to logout from firmware when
1372          * session eventually ends and release corresponding nport handle.
1373          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1374          * code will adjust these flags as necessary.
1375          */
1376         sess->logout_on_delete = 1;
1377         sess->keep_nport_handle = 0;
1378         sess->logout_completed = 0;
1379
1380         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1381             &fcport->port_name[0], sess) < 0) {
1382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1383                     "(%d) %8phC check_initiator_node_acl failed\n",
1384                     vha->vp_idx, fcport->port_name);
1385                 return NULL;
1386         } else {
1387                 kref_init(&fcport->sess_kref);
1388                 /*
1389                  * Take an extra reference to ->sess_kref here to handle
1390                  * fc_port access across ->tgt.sess_lock reaquire.
1391                  */
1392                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1393                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1394                             "%s: kref_get_unless_zero failed for %8phC\n",
1395                             __func__, sess->port_name);
1396                         return NULL;
1397                 }
1398
1399                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1400                 if (!IS_SW_RESV_ADDR(sess->d_id))
1401                         vha->vha_tgt.qla_tgt->sess_count++;
1402
1403                 qlt_do_generation_tick(vha, &sess->generation);
1404                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1405         }
1406
1407         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1408             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1409             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1410             vha->vha_tgt.qla_tgt->sess_count);
1411
1412         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1413             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1414             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1415             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1416             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1417             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1418
1419         return sess;
1420 }
1421
1422 /*
1423  * max_gen - specifies maximum session generation
1424  * at which this deletion requestion is still valid
1425  */
1426 void
1427 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1428 {
1429         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1430         struct fc_port *sess = fcport;
1431         unsigned long flags;
1432
1433         if (!vha->hw->tgt.tgt_ops)
1434                 return;
1435
1436         if (!tgt)
1437                 return;
1438
1439         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1440         if (tgt->tgt_stop) {
1441                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1442                 return;
1443         }
1444         if (!sess->se_sess) {
1445                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1446                 return;
1447         }
1448
1449         if (max_gen - sess->generation < 0) {
1450                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1452                     "Ignoring stale deletion request for se_sess %p / sess %p"
1453                     " for port %8phC, req_gen %d, sess_gen %d\n",
1454                     sess->se_sess, sess, sess->port_name, max_gen,
1455                     sess->generation);
1456                 return;
1457         }
1458
1459         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1460
1461         sess->local = 1;
1462         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1463         qlt_schedule_sess_for_deletion(sess);
1464 }
1465
1466 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1467 {
1468         struct qla_hw_data *ha = tgt->ha;
1469         unsigned long flags;
1470         int res;
1471         /*
1472          * We need to protect against race, when tgt is freed before or
1473          * inside wake_up()
1474          */
1475         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1476         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1477             "tgt %p, sess_count=%d\n",
1478             tgt, tgt->sess_count);
1479         res = (tgt->sess_count == 0);
1480         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1481
1482         return res;
1483 }
1484
1485 /* Called by tcm_qla2xxx configfs code */
1486 int qlt_stop_phase1(struct qla_tgt *tgt)
1487 {
1488         struct scsi_qla_host *vha = tgt->vha;
1489         struct qla_hw_data *ha = tgt->ha;
1490         unsigned long flags;
1491
1492         mutex_lock(&ha->optrom_mutex);
1493         mutex_lock(&qla_tgt_mutex);
1494
1495         if (tgt->tgt_stop || tgt->tgt_stopped) {
1496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1497                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1498                 mutex_unlock(&qla_tgt_mutex);
1499                 mutex_unlock(&ha->optrom_mutex);
1500                 return -EPERM;
1501         }
1502
1503         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1504             vha->host_no, vha);
1505         /*
1506          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1507          * Lock is needed, because we still can get an incoming packet.
1508          */
1509         mutex_lock(&vha->vha_tgt.tgt_mutex);
1510         tgt->tgt_stop = 1;
1511         qlt_clear_tgt_db(tgt);
1512         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1513         mutex_unlock(&qla_tgt_mutex);
1514
1515         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1516             "Waiting for sess works (tgt %p)", tgt);
1517         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1518         while (!list_empty(&tgt->sess_works_list)) {
1519                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1520                 flush_scheduled_work();
1521                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1522         }
1523         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1524
1525         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1526             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1527
1528         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1529
1530         /* Big hammer */
1531         if (!ha->flags.host_shutting_down &&
1532             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1533                 qlt_disable_vha(vha);
1534
1535         /* Wait for sessions to clear out (just in case) */
1536         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1537         mutex_unlock(&ha->optrom_mutex);
1538
1539         return 0;
1540 }
1541 EXPORT_SYMBOL(qlt_stop_phase1);
1542
1543 /* Called by tcm_qla2xxx configfs code */
1544 void qlt_stop_phase2(struct qla_tgt *tgt)
1545 {
1546         scsi_qla_host_t *vha = tgt->vha;
1547
1548         if (tgt->tgt_stopped) {
1549                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1550                     "Already in tgt->tgt_stopped state\n");
1551                 dump_stack();
1552                 return;
1553         }
1554         if (!tgt->tgt_stop) {
1555                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1556                     "%s: phase1 stop is not completed\n", __func__);
1557                 dump_stack();
1558                 return;
1559         }
1560
1561         mutex_lock(&vha->vha_tgt.tgt_mutex);
1562         tgt->tgt_stop = 0;
1563         tgt->tgt_stopped = 1;
1564         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1565
1566         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1567             tgt);
1568
1569         switch (vha->qlini_mode) {
1570         case QLA2XXX_INI_MODE_EXCLUSIVE:
1571                 vha->flags.online = 1;
1572                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1573                 break;
1574         default:
1575                 break;
1576         }
1577 }
1578 EXPORT_SYMBOL(qlt_stop_phase2);
1579
1580 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1581 static void qlt_release(struct qla_tgt *tgt)
1582 {
1583         scsi_qla_host_t *vha = tgt->vha;
1584         void *node;
1585         u64 key = 0;
1586         u16 i;
1587         struct qla_qpair_hint *h;
1588         struct qla_hw_data *ha = vha->hw;
1589
1590         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1591                 qlt_stop_phase1(tgt);
1592
1593         if (!tgt->tgt_stopped)
1594                 qlt_stop_phase2(tgt);
1595
1596         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1597                 unsigned long flags;
1598
1599                 h = &tgt->qphints[i];
1600                 if (h->qpair) {
1601                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1602                         list_del(&h->hint_elem);
1603                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1604                         h->qpair = NULL;
1605                 }
1606         }
1607         kfree(tgt->qphints);
1608         mutex_lock(&qla_tgt_mutex);
1609         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1610         mutex_unlock(&qla_tgt_mutex);
1611
1612         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1613                 btree_remove64(&tgt->lun_qpair_map, key);
1614
1615         btree_destroy64(&tgt->lun_qpair_map);
1616
1617         if (vha->vp_idx)
1618                 if (ha->tgt.tgt_ops &&
1619                     ha->tgt.tgt_ops->remove_target &&
1620                     vha->vha_tgt.target_lport_ptr)
1621                         ha->tgt.tgt_ops->remove_target(vha);
1622
1623         vha->vha_tgt.qla_tgt = NULL;
1624
1625         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1626             "Release of tgt %p finished\n", tgt);
1627
1628         kfree(tgt);
1629 }
1630
1631 /* ha->hardware_lock supposed to be held on entry */
1632 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1633         const void *param, unsigned int param_size)
1634 {
1635         struct qla_tgt_sess_work_param *prm;
1636         unsigned long flags;
1637
1638         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1639         if (!prm) {
1640                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1641                     "qla_target(%d): Unable to create session "
1642                     "work, command will be refused", 0);
1643                 return -ENOMEM;
1644         }
1645
1646         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1647             "Scheduling work (type %d, prm %p)"
1648             " to find session for param %p (size %d, tgt %p)\n",
1649             type, prm, param, param_size, tgt);
1650
1651         prm->type = type;
1652         memcpy(&prm->tm_iocb, param, param_size);
1653
1654         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1655         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1656         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1657
1658         schedule_work(&tgt->sess_work);
1659
1660         return 0;
1661 }
1662
1663 /*
1664  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1665  */
1666 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1667         struct imm_ntfy_from_isp *ntfy,
1668         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1669         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1670 {
1671         struct scsi_qla_host *vha = qpair->vha;
1672         struct qla_hw_data *ha = vha->hw;
1673         request_t *pkt;
1674         struct nack_to_isp *nack;
1675
1676         if (!ha->flags.fw_started)
1677                 return;
1678
1679         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1680
1681         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1682         if (!pkt) {
1683                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1684                     "qla_target(%d): %s failed: unable to allocate "
1685                     "request packet\n", vha->vp_idx, __func__);
1686                 return;
1687         }
1688
1689         if (vha->vha_tgt.qla_tgt != NULL)
1690                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1691
1692         pkt->entry_type = NOTIFY_ACK_TYPE;
1693         pkt->entry_count = 1;
1694
1695         nack = (struct nack_to_isp *)pkt;
1696         nack->ox_id = ntfy->ox_id;
1697
1698         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1699         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1700         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1701                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1702                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1703         }
1704         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1705         nack->u.isp24.status = ntfy->u.isp24.status;
1706         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1707         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1708         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1709         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1710         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1711         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1712         nack->u.isp24.srr_reject_code = srr_reject_code;
1713         nack->u.isp24.srr_reject_code_expl = srr_explan;
1714         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1715
1716         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1717             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1718             vha->vp_idx, nack->u.isp24.status);
1719
1720         /* Memory Barrier */
1721         wmb();
1722         qla2x00_start_iocbs(vha, qpair->req);
1723 }
1724
1725 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1726 {
1727         struct scsi_qla_host *vha = mcmd->vha;
1728         struct qla_hw_data *ha = vha->hw;
1729         struct abts_resp_to_24xx *resp;
1730         __le32 f_ctl;
1731         uint32_t h;
1732         uint8_t *p;
1733         int rc;
1734         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1735         struct qla_qpair *qpair = mcmd->qpair;
1736
1737         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1738             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1739             ha, mcmd->fc_tm_rsp);
1740
1741         rc = qlt_check_reserve_free_req(qpair, 1);
1742         if (rc) {
1743                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1744                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1745                     vha->vp_idx, __func__);
1746                 return -EAGAIN;
1747         }
1748
1749         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1750         memset(resp, 0, sizeof(*resp));
1751
1752         h = qlt_make_handle(qpair);
1753         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1754                 /*
1755                  * CTIO type 7 from the firmware doesn't provide a way to
1756                  * know the initiator's LOOP ID, hence we can't find
1757                  * the session and, so, the command.
1758                  */
1759                 return -EAGAIN;
1760         } else {
1761                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1762         }
1763
1764         resp->handle = make_handle(qpair->req->id, h);
1765         resp->entry_type = ABTS_RESP_24XX;
1766         resp->entry_count = 1;
1767         resp->nport_handle = abts->nport_handle;
1768         resp->vp_index = vha->vp_idx;
1769         resp->sof_type = abts->sof_type;
1770         resp->exchange_address = abts->exchange_address;
1771         resp->fcp_hdr_le = abts->fcp_hdr_le;
1772         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1773             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1774             F_CTL_SEQ_INITIATIVE);
1775         p = (uint8_t *)&f_ctl;
1776         resp->fcp_hdr_le.f_ctl[0] = *p++;
1777         resp->fcp_hdr_le.f_ctl[1] = *p++;
1778         resp->fcp_hdr_le.f_ctl[2] = *p;
1779
1780         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1781         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1782
1783         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1784         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1785                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1786                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1787                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1788                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1789                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1790                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1791         } else {
1792                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1793                 resp->payload.ba_rjt.reason_code =
1794                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1795                 /* Other bytes are zero */
1796         }
1797
1798         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1799
1800         /* Memory Barrier */
1801         wmb();
1802         if (qpair->reqq_start_iocbs)
1803                 qpair->reqq_start_iocbs(qpair);
1804         else
1805                 qla2x00_start_iocbs(vha, qpair->req);
1806
1807         return rc;
1808 }
1809
1810 /*
1811  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1812  */
1813 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1814         struct abts_recv_from_24xx *abts, uint32_t status,
1815         bool ids_reversed)
1816 {
1817         struct scsi_qla_host *vha = qpair->vha;
1818         struct qla_hw_data *ha = vha->hw;
1819         struct abts_resp_to_24xx *resp;
1820         __le32 f_ctl;
1821         uint8_t *p;
1822
1823         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1824             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1825             ha, abts, status);
1826
1827         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1828             NULL);
1829         if (!resp) {
1830                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1831                     "qla_target(%d): %s failed: unable to allocate "
1832                     "request packet", vha->vp_idx, __func__);
1833                 return;
1834         }
1835
1836         resp->entry_type = ABTS_RESP_24XX;
1837         resp->handle = QLA_TGT_SKIP_HANDLE;
1838         resp->entry_count = 1;
1839         resp->nport_handle = abts->nport_handle;
1840         resp->vp_index = vha->vp_idx;
1841         resp->sof_type = abts->sof_type;
1842         resp->exchange_address = abts->exchange_address;
1843         resp->fcp_hdr_le = abts->fcp_hdr_le;
1844         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1845             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1846             F_CTL_SEQ_INITIATIVE);
1847         p = (uint8_t *)&f_ctl;
1848         resp->fcp_hdr_le.f_ctl[0] = *p++;
1849         resp->fcp_hdr_le.f_ctl[1] = *p++;
1850         resp->fcp_hdr_le.f_ctl[2] = *p;
1851         if (ids_reversed) {
1852                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1853                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1854         } else {
1855                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1856                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1857         }
1858         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1859         if (status == FCP_TMF_CMPL) {
1860                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1861                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1862                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1863                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1864                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1865                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1866         } else {
1867                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1868                 resp->payload.ba_rjt.reason_code =
1869                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1870                 /* Other bytes are zero */
1871         }
1872
1873         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1874
1875         /* Memory Barrier */
1876         wmb();
1877         if (qpair->reqq_start_iocbs)
1878                 qpair->reqq_start_iocbs(qpair);
1879         else
1880                 qla2x00_start_iocbs(vha, qpair->req);
1881 }
1882
1883 /*
1884  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1885  */
1886 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1887     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1888 {
1889         struct ctio7_to_24xx *ctio;
1890         u16 tmp;
1891         struct abts_recv_from_24xx *entry;
1892
1893         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1894         if (ctio == NULL) {
1895                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1896                     "qla_target(%d): %s failed: unable to allocate "
1897                     "request packet\n", vha->vp_idx, __func__);
1898                 return;
1899         }
1900
1901         if (mcmd)
1902                 /* abts from remote port */
1903                 entry = &mcmd->orig_iocb.abts;
1904         else
1905                 /* abts from this driver.  */
1906                 entry = (struct abts_recv_from_24xx *)pkt;
1907
1908         /*
1909          * We've got on entrance firmware's response on by us generated
1910          * ABTS response. So, in it ID fields are reversed.
1911          */
1912
1913         ctio->entry_type = CTIO_TYPE7;
1914         ctio->entry_count = 1;
1915         ctio->nport_handle = entry->nport_handle;
1916         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1917         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1918         ctio->vp_index = vha->vp_idx;
1919         ctio->exchange_addr = entry->exchange_addr_to_abort;
1920         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1921
1922         if (mcmd) {
1923                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1924
1925                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1926                         tmp |= (mcmd->abort_io_attr << 9);
1927                 else if (qpair->retry_term_cnt & 1)
1928                         tmp |= (0x4 << 9);
1929         } else {
1930                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1931
1932                 if (qpair->retry_term_cnt & 1)
1933                         tmp |= (0x4 << 9);
1934         }
1935         ctio->u.status1.flags = cpu_to_le16(tmp);
1936         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1937
1938         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1939             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1940             le16_to_cpu(ctio->u.status1.flags),
1941             le16_to_cpu(ctio->u.status1.ox_id),
1942             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1943
1944         /* Memory Barrier */
1945         wmb();
1946         if (qpair->reqq_start_iocbs)
1947                 qpair->reqq_start_iocbs(qpair);
1948         else
1949                 qla2x00_start_iocbs(vha, qpair->req);
1950
1951         if (mcmd)
1952                 qlt_build_abts_resp_iocb(mcmd);
1953         else
1954                 qlt_24xx_send_abts_resp(qpair,
1955                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1956
1957 }
1958
1959 /* drop cmds for the given lun
1960  * XXX only looks for cmds on the port through which lun reset was recieved
1961  * XXX does not go through the list of other port (which may have cmds
1962  *     for the same lun)
1963  */
1964 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1965 {
1966         struct qla_tgt_sess_op *op;
1967         struct qla_tgt_cmd *cmd;
1968         uint32_t key;
1969         unsigned long flags;
1970
1971         key = sid_to_key(s_id);
1972         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1973         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1974                 uint32_t op_key;
1975                 u64 op_lun;
1976
1977                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1978                 op_lun = scsilun_to_int(
1979                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1980                 if (op_key == key && op_lun == lun)
1981                         op->aborted = true;
1982         }
1983
1984         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1985                 uint32_t op_key;
1986                 u64 op_lun;
1987
1988                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1989                 op_lun = scsilun_to_int(
1990                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1991                 if (op_key == key && op_lun == lun)
1992                         op->aborted = true;
1993         }
1994
1995         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1996                 uint32_t cmd_key;
1997                 u64 cmd_lun;
1998
1999                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2000                 cmd_lun = scsilun_to_int(
2001                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2002                 if (cmd_key == key && cmd_lun == lun)
2003                         cmd->aborted = 1;
2004         }
2005         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2006 }
2007
2008 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2009     uint64_t unpacked_lun)
2010 {
2011         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2012         struct qla_qpair_hint *h = NULL;
2013
2014         if (vha->flags.qpairs_available) {
2015                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2016                 if (!h)
2017                         h = &tgt->qphints[0];
2018         } else {
2019                 h = &tgt->qphints[0];
2020         }
2021
2022         return h;
2023 }
2024
2025 static void qlt_do_tmr_work(struct work_struct *work)
2026 {
2027         struct qla_tgt_mgmt_cmd *mcmd =
2028                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2029         struct qla_hw_data *ha = mcmd->vha->hw;
2030         int rc;
2031         uint32_t tag;
2032         unsigned long flags;
2033
2034         switch (mcmd->tmr_func) {
2035         case QLA_TGT_ABTS:
2036                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2037                 break;
2038         default:
2039                 tag = 0;
2040                 break;
2041         }
2042
2043         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2044             mcmd->tmr_func, tag);
2045
2046         if (rc != 0) {
2047                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2048                 switch (mcmd->tmr_func) {
2049                 case QLA_TGT_ABTS:
2050                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2051                         qlt_build_abts_resp_iocb(mcmd);
2052                         break;
2053                 case QLA_TGT_LUN_RESET:
2054                 case QLA_TGT_CLEAR_TS:
2055                 case QLA_TGT_ABORT_TS:
2056                 case QLA_TGT_CLEAR_ACA:
2057                 case QLA_TGT_TARGET_RESET:
2058                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2059                             qla_sam_status);
2060                         break;
2061
2062                 case QLA_TGT_ABORT_ALL:
2063                 case QLA_TGT_NEXUS_LOSS_SESS:
2064                 case QLA_TGT_NEXUS_LOSS:
2065                         qlt_send_notify_ack(mcmd->qpair,
2066                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2067                         break;
2068                 }
2069                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2070
2071                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2072                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2073                     mcmd->vha->vp_idx, rc);
2074                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2075         }
2076 }
2077
2078 /* ha->hardware_lock supposed to be held on entry */
2079 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2080         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2081 {
2082         struct qla_hw_data *ha = vha->hw;
2083         struct qla_tgt_mgmt_cmd *mcmd;
2084         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2085         struct qla_tgt_cmd *abort_cmd;
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         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2114                                 le32_to_cpu(abts->exchange_addr_to_abort));
2115         if (!abort_cmd)
2116                 return -EIO;
2117         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2118
2119         if (abort_cmd->qpair) {
2120                 mcmd->qpair = abort_cmd->qpair;
2121                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2122                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2123                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
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         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4295         cmd->state = QLA_TGT_STATE_NEW;
4296         cmd->tgt = vha->vha_tgt.qla_tgt;
4297         qlt_incr_num_pend_cmds(vha);
4298         cmd->vha = vha;
4299         cmd->sess = sess;
4300         cmd->loop_id = sess->loop_id;
4301         cmd->conf_compl_supported = sess->conf_compl_supported;
4302
4303         cmd->trc_flags = 0;
4304         cmd->jiffies_at_alloc = get_jiffies_64();
4305
4306         cmd->unpacked_lun = scsilun_to_int(
4307             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4308         qlt_assign_qpair(vha, cmd);
4309         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4310         cmd->vp_idx = vha->vp_idx;
4311
4312         return cmd;
4313 }
4314
4315 /* ha->hardware_lock supposed to be held on entry */
4316 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4317         struct atio_from_isp *atio)
4318 {
4319         struct qla_hw_data *ha = vha->hw;
4320         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4321         struct fc_port *sess;
4322         struct qla_tgt_cmd *cmd;
4323         unsigned long flags;
4324         port_id_t id;
4325
4326         if (unlikely(tgt->tgt_stop)) {
4327                 ql_dbg(ql_dbg_io, vha, 0x3061,
4328                     "New command while device %p is shutting down\n", tgt);
4329                 return -ENODEV;
4330         }
4331
4332         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4333         if (IS_SW_RESV_ADDR(id))
4334                 return -EBUSY;
4335
4336         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4337         if (unlikely(!sess))
4338                 return -EFAULT;
4339
4340         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4341          * session deletion, but it's still in sess_del_work wq */
4342         if (sess->deleted) {
4343                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4344                     "New command while old session %p is being deleted\n",
4345                     sess);
4346                 return -EFAULT;
4347         }
4348
4349         /*
4350          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4351          */
4352         if (!kref_get_unless_zero(&sess->sess_kref)) {
4353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4354                     "%s: kref_get fail, %8phC oxid %x \n",
4355                     __func__, sess->port_name,
4356                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4357                 return -EFAULT;
4358         }
4359
4360         cmd = qlt_get_tag(vha, sess, atio);
4361         if (!cmd) {
4362                 ql_dbg(ql_dbg_io, vha, 0x3062,
4363                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4364                 ha->tgt.tgt_ops->put_sess(sess);
4365                 return -EBUSY;
4366         }
4367
4368         cmd->cmd_in_wq = 1;
4369         cmd->trc_flags |= TRC_NEW_CMD;
4370
4371         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4372         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4373         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4374
4375         INIT_WORK(&cmd->work, qlt_do_work);
4376         if (vha->flags.qpairs_available) {
4377                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4378         } else if (ha->msix_count) {
4379                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4380                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4381                             &cmd->work);
4382                 else
4383                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4384                             &cmd->work);
4385         } else {
4386                 queue_work(qla_tgt_wq, &cmd->work);
4387         }
4388
4389         return 0;
4390 }
4391
4392 /* ha->hardware_lock supposed to be held on entry */
4393 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4394         int fn, void *iocb, int flags)
4395 {
4396         struct scsi_qla_host *vha = sess->vha;
4397         struct qla_hw_data *ha = vha->hw;
4398         struct qla_tgt_mgmt_cmd *mcmd;
4399         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4400         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4401
4402         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4403         if (!mcmd) {
4404                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4405                     "qla_target(%d): Allocation of management "
4406                     "command failed, some commands and their data could "
4407                     "leak\n", vha->vp_idx);
4408                 return -ENOMEM;
4409         }
4410         memset(mcmd, 0, sizeof(*mcmd));
4411         mcmd->sess = sess;
4412
4413         if (iocb) {
4414                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4415                     sizeof(mcmd->orig_iocb.imm_ntfy));
4416         }
4417         mcmd->tmr_func = fn;
4418         mcmd->flags = flags;
4419         mcmd->reset_count = ha->base_qpair->chip_reset;
4420         mcmd->qpair = h->qpair;
4421         mcmd->vha = vha;
4422         mcmd->se_cmd.cpuid = h->cpuid;
4423         mcmd->unpacked_lun = lun;
4424
4425         switch (fn) {
4426         case QLA_TGT_LUN_RESET:
4427         case QLA_TGT_CLEAR_TS:
4428         case QLA_TGT_ABORT_TS:
4429                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4430                 fallthrough;
4431         case QLA_TGT_CLEAR_ACA:
4432                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4433                 mcmd->qpair = h->qpair;
4434                 mcmd->se_cmd.cpuid = h->cpuid;
4435                 break;
4436
4437         case QLA_TGT_TARGET_RESET:
4438         case QLA_TGT_NEXUS_LOSS_SESS:
4439         case QLA_TGT_NEXUS_LOSS:
4440         case QLA_TGT_ABORT_ALL:
4441         default:
4442                 /* no-op */
4443                 break;
4444         }
4445
4446         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4447         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4448             &mcmd->work);
4449
4450         return 0;
4451 }
4452
4453 /* ha->hardware_lock supposed to be held on entry */
4454 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4455 {
4456         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4457         struct qla_hw_data *ha = vha->hw;
4458         struct fc_port *sess;
4459         u64 unpacked_lun;
4460         int fn;
4461         unsigned long flags;
4462
4463         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4464
4465         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4466         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4467             a->u.isp24.fcp_hdr.s_id);
4468         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4469
4470         unpacked_lun =
4471             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4472
4473         if (sess == NULL || sess->deleted)
4474                 return -EFAULT;
4475
4476         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4477 }
4478
4479 /* ha->hardware_lock supposed to be held on entry */
4480 static int __qlt_abort_task(struct scsi_qla_host *vha,
4481         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4482 {
4483         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4484         struct qla_hw_data *ha = vha->hw;
4485         struct qla_tgt_mgmt_cmd *mcmd;
4486         u64 unpacked_lun;
4487         int rc;
4488
4489         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4490         if (mcmd == NULL) {
4491                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4492                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4493                     vha->vp_idx, __func__);
4494                 return -ENOMEM;
4495         }
4496         memset(mcmd, 0, sizeof(*mcmd));
4497
4498         mcmd->sess = sess;
4499         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4500             sizeof(mcmd->orig_iocb.imm_ntfy));
4501
4502         unpacked_lun =
4503             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4504         mcmd->reset_count = ha->base_qpair->chip_reset;
4505         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4506         mcmd->qpair = ha->base_qpair;
4507
4508         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4509             le16_to_cpu(iocb->u.isp2x.seq_id));
4510         if (rc != 0) {
4511                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4512                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4513                     vha->vp_idx, rc);
4514                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4515                 return -EFAULT;
4516         }
4517
4518         return 0;
4519 }
4520
4521 /* ha->hardware_lock supposed to be held on entry */
4522 static int qlt_abort_task(struct scsi_qla_host *vha,
4523         struct imm_ntfy_from_isp *iocb)
4524 {
4525         struct qla_hw_data *ha = vha->hw;
4526         struct fc_port *sess;
4527         int loop_id;
4528         unsigned long flags;
4529
4530         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4531
4532         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4533         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4534         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4535
4536         if (sess == NULL) {
4537                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4538                     "qla_target(%d): task abort for unexisting "
4539                     "session\n", vha->vp_idx);
4540                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4541                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4542         }
4543
4544         return __qlt_abort_task(vha, iocb, sess);
4545 }
4546
4547 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4548 {
4549         if (rc != MBS_COMMAND_COMPLETE) {
4550                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4551                         "%s: se_sess %p / sess %p from"
4552                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4553                         " LOGO failed: %#x\n",
4554                         __func__,
4555                         fcport->se_sess,
4556                         fcport,
4557                         fcport->port_name, fcport->loop_id,
4558                         fcport->d_id.b.domain, fcport->d_id.b.area,
4559                         fcport->d_id.b.al_pa, rc);
4560         }
4561
4562         fcport->logout_completed = 1;
4563 }
4564
4565 /*
4566 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4567 *
4568 * Schedules sessions with matching port_id/loop_id but different wwn for
4569 * deletion. Returns existing session with matching wwn if present.
4570 * Null otherwise.
4571 */
4572 struct fc_port *
4573 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4574     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4575 {
4576         struct fc_port *sess = NULL, *other_sess;
4577         uint64_t other_wwn;
4578
4579         *conflict_sess = NULL;
4580
4581         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4582
4583                 other_wwn = wwn_to_u64(other_sess->port_name);
4584
4585                 if (wwn == other_wwn) {
4586                         WARN_ON(sess);
4587                         sess = other_sess;
4588                         continue;
4589                 }
4590
4591                 /* find other sess with nport_id collision */
4592                 if (port_id.b24 == other_sess->d_id.b24) {
4593                         if (loop_id != other_sess->loop_id) {
4594                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4595                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4596                                     other_sess, other_sess->loop_id, other_wwn);
4597
4598                                 /*
4599                                  * logout_on_delete is set by default, but another
4600                                  * session that has the same s_id/loop_id combo
4601                                  * might have cleared it when requested this session
4602                                  * deletion, so don't touch it
4603                                  */
4604                                 qlt_schedule_sess_for_deletion(other_sess);
4605                         } else {
4606                                 /*
4607                                  * Another wwn used to have our s_id/loop_id
4608                                  * kill the session, but don't free the loop_id
4609                                  */
4610                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4611                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4612                                     other_sess, other_sess->loop_id, other_wwn);
4613
4614                                 other_sess->keep_nport_handle = 1;
4615                                 if (other_sess->disc_state != DSC_DELETED)
4616                                         *conflict_sess = other_sess;
4617                                 qlt_schedule_sess_for_deletion(other_sess);
4618                         }
4619                         continue;
4620                 }
4621
4622                 /* find other sess with nport handle collision */
4623                 if ((loop_id == other_sess->loop_id) &&
4624                         (loop_id != FC_NO_LOOP_ID)) {
4625                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4626                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4627                                other_sess, other_sess->loop_id, other_wwn);
4628
4629                         /* Same loop_id but different s_id
4630                          * Ok to kill and logout */
4631                         qlt_schedule_sess_for_deletion(other_sess);
4632                 }
4633         }
4634
4635         return sess;
4636 }
4637
4638 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4639 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4640 {
4641         struct qla_tgt_sess_op *op;
4642         struct qla_tgt_cmd *cmd;
4643         uint32_t key;
4644         int count = 0;
4645         unsigned long flags;
4646
4647         key = (((u32)s_id->b.domain << 16) |
4648                ((u32)s_id->b.area   <<  8) |
4649                ((u32)s_id->b.al_pa));
4650
4651         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4652         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4653                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4654
4655                 if (op_key == key) {
4656                         op->aborted = true;
4657                         count++;
4658                 }
4659         }
4660
4661         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4662                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4663
4664                 if (op_key == key) {
4665                         op->aborted = true;
4666                         count++;
4667                 }
4668         }
4669
4670         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4671                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4672
4673                 if (cmd_key == key) {
4674                         cmd->aborted = 1;
4675                         count++;
4676                 }
4677         }
4678         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4679
4680         return count;
4681 }
4682
4683 static int qlt_handle_login(struct scsi_qla_host *vha,
4684     struct imm_ntfy_from_isp *iocb)
4685 {
4686         struct fc_port *sess = NULL, *conflict_sess = NULL;
4687         uint64_t wwn;
4688         port_id_t port_id;
4689         uint16_t loop_id, wd3_lo;
4690         int res = 0;
4691         struct qlt_plogi_ack_t *pla;
4692         unsigned long flags;
4693
4694         lockdep_assert_held(&vha->hw->hardware_lock);
4695
4696         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4697
4698         port_id.b.domain = iocb->u.isp24.port_id[2];
4699         port_id.b.area   = iocb->u.isp24.port_id[1];
4700         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4701         port_id.b.rsvd_1 = 0;
4702
4703         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4704
4705         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4706         abort_cmds_for_s_id(vha, &port_id);
4707
4708         if (wwn) {
4709                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4710                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4711                     port_id, loop_id, &conflict_sess);
4712                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4713         } else {
4714                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4715                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4716                     __func__, __LINE__, loop_id, port_id.b24);
4717                 qlt_send_term_imm_notif(vha, iocb, 1);
4718                 goto out;
4719         }
4720
4721         if (IS_SW_RESV_ADDR(port_id)) {
4722                 res = 1;
4723                 goto out;
4724         }
4725
4726         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4727         if (!pla) {
4728                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4729                     "%s %d %8phC Term INOT due to mem alloc fail",
4730                     __func__, __LINE__,
4731                     iocb->u.isp24.port_name);
4732                 qlt_send_term_imm_notif(vha, iocb, 1);
4733                 goto out;
4734         }
4735
4736         if (conflict_sess) {
4737                 conflict_sess->login_gen++;
4738                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4739                     QLT_PLOGI_LINK_CONFLICT);
4740         }
4741
4742         if (!sess) {
4743                 pla->ref_count++;
4744                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4745                     "%s %d %8phC post new sess\n",
4746                     __func__, __LINE__, iocb->u.isp24.port_name);
4747                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4748                         qla24xx_post_newsess_work(vha, &port_id,
4749                             iocb->u.isp24.port_name,
4750                             iocb->u.isp24.u.plogi.node_name,
4751                             pla, 0);
4752                 else
4753                         qla24xx_post_newsess_work(vha, &port_id,
4754                             iocb->u.isp24.port_name, NULL,
4755                             pla, 0);
4756
4757                 goto out;
4758         }
4759
4760         if (sess->disc_state == DSC_UPD_FCPORT) {
4761                 u16 sec;
4762
4763                 /*
4764                  * Remote port registration is still going on from
4765                  * previous login. Allow it to finish before we
4766                  * accept the new login.
4767                  */
4768                 sess->next_disc_state = DSC_DELETE_PEND;
4769                 sec = jiffies_to_msecs(jiffies -
4770                     sess->jiffies_at_registration) / 1000;
4771                 if (sess->sec_since_registration < sec && sec &&
4772                     !(sec % 5)) {
4773                         sess->sec_since_registration = sec;
4774                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4775                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4776                             __func__, sess->port_name, sec);
4777                 }
4778
4779                 if (!conflict_sess) {
4780                         list_del(&pla->list);
4781                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4782                 }
4783
4784                 qlt_send_term_imm_notif(vha, iocb, 1);
4785                 goto out;
4786         }
4787
4788         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4789         sess->d_id = port_id;
4790         sess->login_gen++;
4791
4792         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4793                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4794                 sess->local = 0;
4795                 sess->loop_id = loop_id;
4796                 sess->d_id = port_id;
4797                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4798                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4799
4800                 if (wd3_lo & BIT_7)
4801                         sess->conf_compl_supported = 1;
4802
4803                 if ((wd3_lo & BIT_4) == 0)
4804                         sess->port_type = FCT_INITIATOR;
4805                 else
4806                         sess->port_type = FCT_TARGET;
4807
4808         } else
4809                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4810
4811
4812         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4813             "%s %d %8phC  DS %d\n",
4814             __func__, __LINE__, sess->port_name, sess->disc_state);
4815
4816         switch (sess->disc_state) {
4817         case DSC_DELETED:
4818         case DSC_LOGIN_PEND:
4819                 qlt_plogi_ack_unref(vha, pla);
4820                 break;
4821
4822         default:
4823                 /*
4824                  * Under normal circumstances we want to release nport handle
4825                  * during LOGO process to avoid nport handle leaks inside FW.
4826                  * The exception is when LOGO is done while another PLOGI with
4827                  * the same nport handle is waiting as might be the case here.
4828                  * Note: there is always a possibily of a race where session
4829                  * deletion has already started for other reasons (e.g. ACL
4830                  * removal) and now PLOGI arrives:
4831                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4832                  *    FW must have assigned this PLOGI a new/same handle and we
4833                  *    can proceed ACK'ing it as usual when session deletion
4834                  *    completes.
4835                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4836                  *    bit reached it, the handle has now been released. We'll
4837                  *    get an error when we ACK this PLOGI. Nothing will be sent
4838                  *    back to initiator. Initiator should eventually retry
4839                  *    PLOGI and situation will correct itself.
4840                  */
4841                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4842                     (sess->d_id.b24 == port_id.b24));
4843
4844                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4845                     "%s %d %8phC post del sess\n",
4846                     __func__, __LINE__, sess->port_name);
4847
4848
4849                 qlt_schedule_sess_for_deletion(sess);
4850                 break;
4851         }
4852 out:
4853         return res;
4854 }
4855
4856 /*
4857  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4858  */
4859 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4860         struct imm_ntfy_from_isp *iocb)
4861 {
4862         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4863         struct qla_hw_data *ha = vha->hw;
4864         struct fc_port *sess = NULL, *conflict_sess = NULL;
4865         uint64_t wwn;
4866         port_id_t port_id;
4867         uint16_t loop_id;
4868         uint16_t wd3_lo;
4869         int res = 0;
4870         unsigned long flags;
4871
4872         lockdep_assert_held(&ha->hardware_lock);
4873
4874         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4875
4876         port_id.b.domain = iocb->u.isp24.port_id[2];
4877         port_id.b.area   = iocb->u.isp24.port_id[1];
4878         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4879         port_id.b.rsvd_1 = 0;
4880
4881         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4882
4883         ql_dbg(ql_dbg_disc, vha, 0xf026,
4884             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4885             vha->vp_idx, iocb->u.isp24.port_id[2],
4886                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4887                    iocb->u.isp24.status_subcode, loop_id,
4888                 iocb->u.isp24.port_name);
4889
4890         /* res = 1 means ack at the end of thread
4891          * res = 0 means ack async/later.
4892          */
4893         switch (iocb->u.isp24.status_subcode) {
4894         case ELS_PLOGI:
4895                 res = qlt_handle_login(vha, iocb);
4896                 break;
4897
4898         case ELS_PRLI:
4899                 if (N2N_TOPO(ha)) {
4900                         sess = qla2x00_find_fcport_by_wwpn(vha,
4901                             iocb->u.isp24.port_name, 1);
4902
4903                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4904                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4905                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4906                                     __func__, __LINE__,
4907                                     iocb->u.isp24.port_name);
4908                                 qlt_send_term_imm_notif(vha, iocb, 1);
4909                                 break;
4910                         }
4911
4912                         res = qlt_handle_login(vha, iocb);
4913                         break;
4914                 }
4915
4916                 if (IS_SW_RESV_ADDR(port_id)) {
4917                         res = 1;
4918                         break;
4919                 }
4920
4921                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4922
4923                 if (wwn) {
4924                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4925                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4926                                 loop_id, &conflict_sess);
4927                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4928                 }
4929
4930                 if (conflict_sess) {
4931                         switch (conflict_sess->disc_state) {
4932                         case DSC_DELETED:
4933                         case DSC_DELETE_PEND:
4934                                 break;
4935                         default:
4936                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4937                                     "PRLI with conflicting sess %p port %8phC\n",
4938                                     conflict_sess, conflict_sess->port_name);
4939                                 conflict_sess->fw_login_state =
4940                                     DSC_LS_PORT_UNAVAIL;
4941                                 qlt_send_term_imm_notif(vha, iocb, 1);
4942                                 res = 0;
4943                                 break;
4944                         }
4945                 }
4946
4947                 if (sess != NULL) {
4948                         bool delete = false;
4949                         int sec;
4950
4951                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4952                         switch (sess->fw_login_state) {
4953                         case DSC_LS_PLOGI_PEND:
4954                         case DSC_LS_PLOGI_COMP:
4955                         case DSC_LS_PRLI_COMP:
4956                                 break;
4957                         default:
4958                                 delete = true;
4959                                 break;
4960                         }
4961
4962                         switch (sess->disc_state) {
4963                         case DSC_UPD_FCPORT:
4964                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4965                                     flags);
4966
4967                                 sec = jiffies_to_msecs(jiffies -
4968                                     sess->jiffies_at_registration)/1000;
4969                                 if (sess->sec_since_registration < sec && sec &&
4970                                     !(sec % 5)) {
4971                                         sess->sec_since_registration = sec;
4972                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4973                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4974                                             __func__, sess->port_name, sec);
4975                                 }
4976                                 qlt_send_term_imm_notif(vha, iocb, 1);
4977                                 return 0;
4978
4979                         case DSC_LOGIN_PEND:
4980                         case DSC_GPDB:
4981                         case DSC_LOGIN_COMPLETE:
4982                         case DSC_ADISC:
4983                                 delete = false;
4984                                 break;
4985                         default:
4986                                 break;
4987                         }
4988
4989                         if (delete) {
4990                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4991                                     flags);
4992                                 /*
4993                                  * Impatient initiator sent PRLI before last
4994                                  * PLOGI could finish. Will force him to re-try,
4995                                  * while last one finishes.
4996                                  */
4997                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4998                                     "sess %p PRLI received, before plogi ack.\n",
4999                                     sess);
5000                                 qlt_send_term_imm_notif(vha, iocb, 1);
5001                                 res = 0;
5002                                 break;
5003                         }
5004
5005                         /*
5006                          * This shouldn't happen under normal circumstances,
5007                          * since we have deleted the old session during PLOGI
5008                          */
5009                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5010                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5011                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5012
5013                         sess->local = 0;
5014                         sess->loop_id = loop_id;
5015                         sess->d_id = port_id;
5016                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5017
5018                         if (wd3_lo & BIT_7)
5019                                 sess->conf_compl_supported = 1;
5020
5021                         if ((wd3_lo & BIT_4) == 0)
5022                                 sess->port_type = FCT_INITIATOR;
5023                         else
5024                                 sess->port_type = FCT_TARGET;
5025
5026                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5027                 }
5028                 res = 1; /* send notify ack */
5029
5030                 /* Make session global (not used in fabric mode) */
5031                 if (ha->current_topology != ISP_CFG_F) {
5032                         if (sess) {
5033                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5034                                     "%s %d %8phC post nack\n",
5035                                     __func__, __LINE__, sess->port_name);
5036                                 qla24xx_post_nack_work(vha, sess, iocb,
5037                                         SRB_NACK_PRLI);
5038                                 res = 0;
5039                         } else {
5040                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5041                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5042                                 qla2xxx_wake_dpc(vha);
5043                         }
5044                 } else {
5045                         if (sess) {
5046                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5047                                     "%s %d %8phC post nack\n",
5048                                     __func__, __LINE__, sess->port_name);
5049                                 qla24xx_post_nack_work(vha, sess, iocb,
5050                                         SRB_NACK_PRLI);
5051                                 res = 0;
5052                         }
5053                 }
5054                 break;
5055
5056         case ELS_TPRLO:
5057                 if (le16_to_cpu(iocb->u.isp24.flags) &
5058                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5059                         loop_id = 0xFFFF;
5060                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5061                         res = 1;
5062                         break;
5063                 }
5064                 fallthrough;
5065         case ELS_LOGO:
5066         case ELS_PRLO:
5067                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5068                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5069                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5070
5071                 if (sess) {
5072                         sess->login_gen++;
5073                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5074                         sess->logo_ack_needed = 1;
5075                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5076                 }
5077
5078                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5079
5080                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5081                     "%s: logo %llx res %d sess %p ",
5082                     __func__, wwn, res, sess);
5083                 if (res == 0) {
5084                         /*
5085                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5086                          * for LOGO_ACK & sess delete
5087                          */
5088                         BUG_ON(!sess);
5089                         res = 0;
5090                 } else {
5091                         /* cmd did not go to upper layer. */
5092                         if (sess) {
5093                                 qlt_schedule_sess_for_deletion(sess);
5094                                 res = 0;
5095                         }
5096                         /* else logo will be ack */
5097                 }
5098                 break;
5099         case ELS_PDISC:
5100         case ELS_ADISC:
5101         {
5102                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5103
5104                 if (tgt->link_reinit_iocb_pending) {
5105                         qlt_send_notify_ack(ha->base_qpair,
5106                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5107                         tgt->link_reinit_iocb_pending = 0;
5108                 }
5109
5110                 sess = qla2x00_find_fcport_by_wwpn(vha,
5111                     iocb->u.isp24.port_name, 1);
5112                 if (sess) {
5113                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5114                                 "sess %p lid %d|%d DS %d LS %d\n",
5115                                 sess, sess->loop_id, loop_id,
5116                                 sess->disc_state, sess->fw_login_state);
5117                 }
5118
5119                 res = 1; /* send notify ack */
5120                 break;
5121         }
5122
5123         case ELS_FLOGI: /* should never happen */
5124         default:
5125                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5126                     "qla_target(%d): Unsupported ELS command %x "
5127                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5128                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5129                 break;
5130         }
5131
5132         ql_dbg(ql_dbg_disc, vha, 0xf026,
5133             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5134             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5135
5136         return res;
5137 }
5138
5139 /*
5140  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5141  */
5142 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5143         struct imm_ntfy_from_isp *iocb)
5144 {
5145         struct qla_hw_data *ha = vha->hw;
5146         uint32_t add_flags = 0;
5147         int send_notify_ack = 1;
5148         uint16_t status;
5149
5150         lockdep_assert_held(&ha->hardware_lock);
5151
5152         status = le16_to_cpu(iocb->u.isp2x.status);
5153         switch (status) {
5154         case IMM_NTFY_LIP_RESET:
5155         {
5156                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5157                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5158                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5159                     iocb->u.isp24.status_subcode);
5160
5161                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5162                         send_notify_ack = 0;
5163                 break;
5164         }
5165
5166         case IMM_NTFY_LIP_LINK_REINIT:
5167         {
5168                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5169
5170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5171                     "qla_target(%d): LINK REINIT (loop %#x, "
5172                     "subcode %x)\n", vha->vp_idx,
5173                     le16_to_cpu(iocb->u.isp24.nport_handle),
5174                     iocb->u.isp24.status_subcode);
5175                 if (tgt->link_reinit_iocb_pending) {
5176                         qlt_send_notify_ack(ha->base_qpair,
5177                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5178                 }
5179                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5180                 tgt->link_reinit_iocb_pending = 1;
5181                 /*
5182                  * QLogic requires to wait after LINK REINIT for possible
5183                  * PDISC or ADISC ELS commands
5184                  */
5185                 send_notify_ack = 0;
5186                 break;
5187         }
5188
5189         case IMM_NTFY_PORT_LOGOUT:
5190                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5191                     "qla_target(%d): Port logout (loop "
5192                     "%#x, subcode %x)\n", vha->vp_idx,
5193                     le16_to_cpu(iocb->u.isp24.nport_handle),
5194                     iocb->u.isp24.status_subcode);
5195
5196                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5197                         send_notify_ack = 0;
5198                 /* The sessions will be cleared in the callback, if needed */
5199                 break;
5200
5201         case IMM_NTFY_GLBL_TPRLO:
5202                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5203                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5204                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5205                         send_notify_ack = 0;
5206                 /* The sessions will be cleared in the callback, if needed */
5207                 break;
5208
5209         case IMM_NTFY_PORT_CONFIG:
5210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5211                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5212                     status);
5213                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5214                         send_notify_ack = 0;
5215                 /* The sessions will be cleared in the callback, if needed */
5216                 break;
5217
5218         case IMM_NTFY_GLBL_LOGO:
5219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5220                     "qla_target(%d): Link failure detected\n",
5221                     vha->vp_idx);
5222                 /* I_T nexus loss */
5223                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5224                         send_notify_ack = 0;
5225                 break;
5226
5227         case IMM_NTFY_IOCB_OVERFLOW:
5228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5229                     "qla_target(%d): Cannot provide requested "
5230                     "capability (IOCB overflowed the immediate notify "
5231                     "resource count)\n", vha->vp_idx);
5232                 break;
5233
5234         case IMM_NTFY_ABORT_TASK:
5235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5236                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5237                     "L %#x)\n", vha->vp_idx,
5238                     le16_to_cpu(iocb->u.isp2x.seq_id),
5239                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5240                     le16_to_cpu(iocb->u.isp2x.lun));
5241                 if (qlt_abort_task(vha, iocb) == 0)
5242                         send_notify_ack = 0;
5243                 break;
5244
5245         case IMM_NTFY_RESOURCE:
5246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5247                     "qla_target(%d): Out of resources, host %ld\n",
5248                     vha->vp_idx, vha->host_no);
5249                 break;
5250
5251         case IMM_NTFY_MSG_RX:
5252                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5253                     "qla_target(%d): Immediate notify task %x\n",
5254                     vha->vp_idx, iocb->u.isp2x.task_flags);
5255                 break;
5256
5257         case IMM_NTFY_ELS:
5258                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5259                         send_notify_ack = 0;
5260                 break;
5261         default:
5262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5263                     "qla_target(%d): Received unknown immediate "
5264                     "notify status %x\n", vha->vp_idx, status);
5265                 break;
5266         }
5267
5268         if (send_notify_ack)
5269                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5270                     0, 0);
5271 }
5272
5273 /*
5274  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5275  * This function sends busy to ISP 2xxx or 24xx.
5276  */
5277 static int __qlt_send_busy(struct qla_qpair *qpair,
5278         struct atio_from_isp *atio, uint16_t status)
5279 {
5280         struct scsi_qla_host *vha = qpair->vha;
5281         struct ctio7_to_24xx *ctio24;
5282         struct qla_hw_data *ha = vha->hw;
5283         request_t *pkt;
5284         struct fc_port *sess = NULL;
5285         unsigned long flags;
5286         u16 temp;
5287         port_id_t id;
5288
5289         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5290
5291         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5292         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5293         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5294         if (!sess) {
5295                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5296                 return 0;
5297         }
5298         /* Sending marker isn't necessary, since we called from ISR */
5299
5300         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5301         if (!pkt) {
5302                 ql_dbg(ql_dbg_io, vha, 0x3063,
5303                     "qla_target(%d): %s failed: unable to allocate "
5304                     "request packet", vha->vp_idx, __func__);
5305                 return -ENOMEM;
5306         }
5307
5308         qpair->tgt_counters.num_q_full_sent++;
5309         pkt->entry_count = 1;
5310         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5311
5312         ctio24 = (struct ctio7_to_24xx *)pkt;
5313         ctio24->entry_type = CTIO_TYPE7;
5314         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5315         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5316         ctio24->vp_index = vha->vp_idx;
5317         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5318         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5319         temp = (atio->u.isp24.attr << 9) |
5320                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5321                 CTIO7_FLAGS_DONT_RET_CTIO;
5322         ctio24->u.status1.flags = cpu_to_le16(temp);
5323         /*
5324          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5325          * if the explicit conformation is used.
5326          */
5327         ctio24->u.status1.ox_id =
5328                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5329         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5330
5331         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5332
5333         if (ctio24->u.status1.residual != 0)
5334                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5335
5336         /* Memory Barrier */
5337         wmb();
5338         if (qpair->reqq_start_iocbs)
5339                 qpair->reqq_start_iocbs(qpair);
5340         else
5341                 qla2x00_start_iocbs(vha, qpair->req);
5342         return 0;
5343 }
5344
5345 /*
5346  * This routine is used to allocate a command for either a QFull condition
5347  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5348  * out previously.
5349  */
5350 static void
5351 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5352         struct atio_from_isp *atio, uint16_t status, int qfull)
5353 {
5354         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5355         struct qla_hw_data *ha = vha->hw;
5356         struct fc_port *sess;
5357         struct qla_tgt_cmd *cmd;
5358         unsigned long flags;
5359
5360         if (unlikely(tgt->tgt_stop)) {
5361                 ql_dbg(ql_dbg_io, vha, 0x300a,
5362                         "New command while device %p is shutting down\n", tgt);
5363                 return;
5364         }
5365
5366         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5367                 vha->hw->tgt.num_qfull_cmds_dropped++;
5368                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5369                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5370                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5371                                 vha->hw->tgt.num_qfull_cmds_dropped;
5372
5373                 ql_dbg(ql_dbg_io, vha, 0x3068,
5374                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5375                         vha->vp_idx, __func__,
5376                         vha->hw->tgt.num_qfull_cmds_dropped);
5377
5378                 qlt_chk_exch_leak_thresh_hold(vha);
5379                 return;
5380         }
5381
5382         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5383                 (vha, atio->u.isp24.fcp_hdr.s_id);
5384         if (!sess)
5385                 return;
5386
5387         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5388         if (!cmd) {
5389                 ql_dbg(ql_dbg_io, vha, 0x3009,
5390                         "qla_target(%d): %s: Allocation of cmd failed\n",
5391                         vha->vp_idx, __func__);
5392
5393                 vha->hw->tgt.num_qfull_cmds_dropped++;
5394                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5395                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5396                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5397                                 vha->hw->tgt.num_qfull_cmds_dropped;
5398
5399                 qlt_chk_exch_leak_thresh_hold(vha);
5400                 return;
5401         }
5402
5403         qlt_incr_num_pend_cmds(vha);
5404         INIT_LIST_HEAD(&cmd->cmd_list);
5405         memcpy(&cmd->atio, atio, sizeof(*atio));
5406
5407         cmd->tgt = vha->vha_tgt.qla_tgt;
5408         cmd->vha = vha;
5409         cmd->reset_count = ha->base_qpair->chip_reset;
5410         cmd->q_full = 1;
5411         cmd->qpair = ha->base_qpair;
5412
5413         if (qfull) {
5414                 cmd->q_full = 1;
5415                 /* NOTE: borrowing the state field to carry the status */
5416                 cmd->state = status;
5417         } else
5418                 cmd->term_exchg = 1;
5419
5420         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5421         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5422
5423         vha->hw->tgt.num_qfull_cmds_alloc++;
5424         if (vha->hw->tgt.num_qfull_cmds_alloc >
5425                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5426                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5427                         vha->hw->tgt.num_qfull_cmds_alloc;
5428         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5429 }
5430
5431 int
5432 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5433 {
5434         struct scsi_qla_host *vha = qpair->vha;
5435         struct qla_hw_data *ha = vha->hw;
5436         unsigned long flags;
5437         struct qla_tgt_cmd *cmd, *tcmd;
5438         struct list_head free_list, q_full_list;
5439         int rc = 0;
5440
5441         if (list_empty(&ha->tgt.q_full_list))
5442                 return 0;
5443
5444         INIT_LIST_HEAD(&free_list);
5445         INIT_LIST_HEAD(&q_full_list);
5446
5447         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5448         if (list_empty(&ha->tgt.q_full_list)) {
5449                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5450                 return 0;
5451         }
5452
5453         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5454         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5455
5456         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5457         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5458                 if (cmd->q_full)
5459                         /* cmd->state is a borrowed field to hold status */
5460                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5461                 else if (cmd->term_exchg)
5462                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5463
5464                 if (rc == -ENOMEM)
5465                         break;
5466
5467                 if (cmd->q_full)
5468                         ql_dbg(ql_dbg_io, vha, 0x3006,
5469                             "%s: busy sent for ox_id[%04x]\n", __func__,
5470                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5471                 else if (cmd->term_exchg)
5472                         ql_dbg(ql_dbg_io, vha, 0x3007,
5473                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5474                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5475                 else
5476                         ql_dbg(ql_dbg_io, vha, 0x3008,
5477                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5478                             cmd);
5479
5480                 list_del(&cmd->cmd_list);
5481                 list_add_tail(&cmd->cmd_list, &free_list);
5482
5483                 /* piggy back on hardware_lock for protection */
5484                 vha->hw->tgt.num_qfull_cmds_alloc--;
5485         }
5486         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5487
5488         cmd = NULL;
5489
5490         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5491                 list_del(&cmd->cmd_list);
5492                 /* This cmd was never sent to TCM.  There is no need
5493                  * to schedule free or call free_cmd
5494                  */
5495                 qlt_free_cmd(cmd);
5496         }
5497
5498         if (!list_empty(&q_full_list)) {
5499                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5500                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5501                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5502         }
5503
5504         return rc;
5505 }
5506
5507 static void
5508 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5509     uint16_t status)
5510 {
5511         int rc = 0;
5512         struct scsi_qla_host *vha = qpair->vha;
5513
5514         rc = __qlt_send_busy(qpair, atio, status);
5515         if (rc == -ENOMEM)
5516                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5517 }
5518
5519 static int
5520 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5521         struct atio_from_isp *atio, uint8_t ha_locked)
5522 {
5523         struct qla_hw_data *ha = vha->hw;
5524         unsigned long flags;
5525
5526         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5527                 return 0;
5528
5529         if (!ha_locked)
5530                 spin_lock_irqsave(&ha->hardware_lock, flags);
5531         qlt_send_busy(qpair, atio, qla_sam_status);
5532         if (!ha_locked)
5533                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5534
5535         return 1;
5536 }
5537
5538 /* ha->hardware_lock supposed to be held on entry */
5539 /* called via callback from qla2xxx */
5540 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5541         struct atio_from_isp *atio, uint8_t ha_locked)
5542 {
5543         struct qla_hw_data *ha = vha->hw;
5544         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5545         int rc;
5546         unsigned long flags = 0;
5547
5548         if (unlikely(tgt == NULL)) {
5549                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5550                     "ATIO pkt, but no tgt (ha %p)", ha);
5551                 return;
5552         }
5553         /*
5554          * In tgt_stop mode we also should allow all requests to pass.
5555          * Otherwise, some commands can stuck.
5556          */
5557
5558         tgt->atio_irq_cmd_count++;
5559
5560         switch (atio->u.raw.entry_type) {
5561         case ATIO_TYPE7:
5562                 if (unlikely(atio->u.isp24.exchange_addr ==
5563                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5564                         ql_dbg(ql_dbg_io, vha, 0x3065,
5565                             "qla_target(%d): ATIO_TYPE7 "
5566                             "received with UNKNOWN exchange address, "
5567                             "sending QUEUE_FULL\n", vha->vp_idx);
5568                         if (!ha_locked)
5569                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5570                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5571                         if (!ha_locked)
5572                                 spin_unlock_irqrestore(&ha->hardware_lock,
5573                                     flags);
5574                         break;
5575                 }
5576
5577                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5578                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5579                             atio, ha_locked);
5580                         if (rc != 0) {
5581                                 tgt->atio_irq_cmd_count--;
5582                                 return;
5583                         }
5584                         rc = qlt_handle_cmd_for_atio(vha, atio);
5585                 } else {
5586                         rc = qlt_handle_task_mgmt(vha, atio);
5587                 }
5588                 if (unlikely(rc != 0)) {
5589                         if (!ha_locked)
5590                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5591                         switch (rc) {
5592                         case -ENODEV:
5593                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5594                                     "qla_target: Unable to send command to target\n");
5595                                 break;
5596                         case -EBADF:
5597                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5598                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5599                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5600                                     atio, 1, 0);
5601                                 break;
5602                         case -EBUSY:
5603                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5604                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5605                                     vha->vp_idx);
5606                                 qlt_send_busy(ha->base_qpair, atio,
5607                                     tc_sam_status);
5608                                 break;
5609                         default:
5610                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5611                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5612                                     vha->vp_idx);
5613                                 qlt_send_busy(ha->base_qpair, atio,
5614                                     qla_sam_status);
5615                                 break;
5616                         }
5617                         if (!ha_locked)
5618                                 spin_unlock_irqrestore(&ha->hardware_lock,
5619                                     flags);
5620                 }
5621                 break;
5622
5623         case IMMED_NOTIFY_TYPE:
5624         {
5625                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5626                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5627                             "qla_target(%d): Received ATIO packet %x "
5628                             "with error status %x\n", vha->vp_idx,
5629                             atio->u.raw.entry_type,
5630                             atio->u.isp2x.entry_status);
5631                         break;
5632                 }
5633                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5634
5635                 if (!ha_locked)
5636                         spin_lock_irqsave(&ha->hardware_lock, flags);
5637                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5638                 if (!ha_locked)
5639                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5640                 break;
5641         }
5642
5643         default:
5644                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5645                     "qla_target(%d): Received unknown ATIO atio "
5646                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5647                 break;
5648         }
5649
5650         tgt->atio_irq_cmd_count--;
5651 }
5652
5653 /*
5654  * qpair lock is assume to be held
5655  * rc = 0 : send terminate & abts respond
5656  * rc != 0: do not send term & abts respond
5657  */
5658 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5659     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5660 {
5661         struct qla_hw_data *ha = vha->hw;
5662         int rc = 0;
5663
5664         /*
5665          * Detect unresolved exchange. If the same ABTS is unable
5666          * to terminate an existing command and the same ABTS loops
5667          * between FW & Driver, then force FW dump. Under 1 jiff,
5668          * we should see multiple loops.
5669          */
5670         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5671             qpair->retry_term_jiff == jiffies) {
5672                 /* found existing exchange */
5673                 qpair->retry_term_cnt++;
5674                 if (qpair->retry_term_cnt >= 5) {
5675                         rc = -EIO;
5676                         qpair->retry_term_cnt = 0;
5677                         ql_log(ql_log_warn, vha, 0xffff,
5678                             "Unable to send ABTS Respond. Dumping firmware.\n");
5679                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5680                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5681
5682                         if (qpair == ha->base_qpair)
5683                                 ha->isp_ops->fw_dump(vha);
5684                         else
5685                                 qla2xxx_dump_fw(vha);
5686
5687                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5688                         qla2xxx_wake_dpc(vha);
5689                 }
5690         } else if (qpair->retry_term_jiff != jiffies) {
5691                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5692                 qpair->retry_term_cnt = 0;
5693                 qpair->retry_term_jiff = jiffies;
5694         }
5695
5696         return rc;
5697 }
5698
5699
5700 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5701         struct rsp_que *rsp, response_t *pkt)
5702 {
5703         struct abts_resp_from_24xx_fw *entry =
5704                 (struct abts_resp_from_24xx_fw *)pkt;
5705         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5706         struct qla_tgt_mgmt_cmd *mcmd;
5707         struct qla_hw_data *ha = vha->hw;
5708
5709         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5710         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5711                 ql_dbg(ql_dbg_async, vha, 0xe064,
5712                     "qla_target(%d): ABTS Comp without mcmd\n",
5713                     vha->vp_idx);
5714                 return;
5715         }
5716
5717         if (mcmd)
5718                 vha  = mcmd->vha;
5719         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5720
5721         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5722             "ABTS_RESP_24XX: compl_status %x\n",
5723             entry->compl_status);
5724
5725         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5726                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5727                     le32_to_cpu(entry->error_subcode2) == 0) {
5728                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5729                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5730                                 return;
5731                         }
5732                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5733                             pkt, mcmd);
5734                 } else {
5735                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5736                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5737                             vha->vp_idx, entry->compl_status,
5738                             entry->error_subcode1,
5739                             entry->error_subcode2);
5740                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5741                 }
5742         } else if (mcmd) {
5743                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5744         }
5745 }
5746
5747 /* ha->hardware_lock supposed to be held on entry */
5748 /* called via callback from qla2xxx */
5749 static void qlt_response_pkt(struct scsi_qla_host *vha,
5750         struct rsp_que *rsp, response_t *pkt)
5751 {
5752         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5753
5754         if (unlikely(tgt == NULL)) {
5755                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5756                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5757                     vha->vp_idx, pkt->entry_type, vha->hw);
5758                 return;
5759         }
5760
5761         /*
5762          * In tgt_stop mode we also should allow all requests to pass.
5763          * Otherwise, some commands can stuck.
5764          */
5765
5766         switch (pkt->entry_type) {
5767         case CTIO_CRC2:
5768         case CTIO_TYPE7:
5769         {
5770                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5771
5772                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5773                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5774                     entry);
5775                 break;
5776         }
5777
5778         case ACCEPT_TGT_IO_TYPE:
5779         {
5780                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5781                 int rc;
5782
5783                 if (atio->u.isp2x.status !=
5784                     cpu_to_le16(ATIO_CDB_VALID)) {
5785                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5786                             "qla_target(%d): ATIO with error "
5787                             "status %x received\n", vha->vp_idx,
5788                             le16_to_cpu(atio->u.isp2x.status));
5789                         break;
5790                 }
5791
5792                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5793                 if (rc != 0)
5794                         return;
5795
5796                 rc = qlt_handle_cmd_for_atio(vha, atio);
5797                 if (unlikely(rc != 0)) {
5798                         switch (rc) {
5799                         case -ENODEV:
5800                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5801                                     "qla_target: Unable to send command to target\n");
5802                                 break;
5803                         case -EBADF:
5804                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5805                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5806                                 qlt_send_term_exchange(rsp->qpair, NULL,
5807                                     atio, 1, 0);
5808                                 break;
5809                         case -EBUSY:
5810                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5811                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5812                                     vha->vp_idx);
5813                                 qlt_send_busy(rsp->qpair, atio,
5814                                     tc_sam_status);
5815                                 break;
5816                         default:
5817                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5818                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5819                                     vha->vp_idx);
5820                                 qlt_send_busy(rsp->qpair, atio,
5821                                     qla_sam_status);
5822                                 break;
5823                         }
5824                 }
5825         }
5826         break;
5827
5828         case CONTINUE_TGT_IO_TYPE:
5829         {
5830                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5831
5832                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5833                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5834                     entry);
5835                 break;
5836         }
5837
5838         case CTIO_A64_TYPE:
5839         {
5840                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5841
5842                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5843                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5844                     entry);
5845                 break;
5846         }
5847
5848         case IMMED_NOTIFY_TYPE:
5849                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5850                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5851                 break;
5852
5853         case NOTIFY_ACK_TYPE:
5854                 if (tgt->notify_ack_expected > 0) {
5855                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5856
5857                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5858                             "NOTIFY_ACK seq %08x status %x\n",
5859                             le16_to_cpu(entry->u.isp2x.seq_id),
5860                             le16_to_cpu(entry->u.isp2x.status));
5861                         tgt->notify_ack_expected--;
5862                         if (entry->u.isp2x.status !=
5863                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5864                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5865                                     "qla_target(%d): NOTIFY_ACK "
5866                                     "failed %x\n", vha->vp_idx,
5867                                     le16_to_cpu(entry->u.isp2x.status));
5868                         }
5869                 } else {
5870                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5871                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5872                             vha->vp_idx);
5873                 }
5874                 break;
5875
5876         case ABTS_RECV_24XX:
5877                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5878                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5879                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5880                 break;
5881
5882         case ABTS_RESP_24XX:
5883                 if (tgt->abts_resp_expected > 0) {
5884                         qlt_handle_abts_completion(vha, rsp, pkt);
5885                 } else {
5886                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5887                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5888                             "received\n", vha->vp_idx);
5889                 }
5890                 break;
5891
5892         default:
5893                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5894                     "qla_target(%d): Received unknown response pkt "
5895                     "type %x\n", vha->vp_idx, pkt->entry_type);
5896                 break;
5897         }
5898
5899 }
5900
5901 /*
5902  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5903  */
5904 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5905         uint16_t *mailbox)
5906 {
5907         struct qla_hw_data *ha = vha->hw;
5908         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5909         int login_code;
5910
5911         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5912                 return;
5913
5914         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5915             IS_QLA2100(ha))
5916                 return;
5917         /*
5918          * In tgt_stop mode we also should allow all requests to pass.
5919          * Otherwise, some commands can stuck.
5920          */
5921
5922
5923         switch (code) {
5924         case MBA_RESET:                 /* Reset */
5925         case MBA_SYSTEM_ERR:            /* System Error */
5926         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5927         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5929                     "qla_target(%d): System error async event %#x "
5930                     "occurred", vha->vp_idx, code);
5931                 break;
5932         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5933                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5934                 break;
5935
5936         case MBA_LOOP_UP:
5937         {
5938                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5939                     "qla_target(%d): Async LOOP_UP occurred "
5940                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5941                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5942                 if (tgt->link_reinit_iocb_pending) {
5943                         qlt_send_notify_ack(ha->base_qpair,
5944                             &tgt->link_reinit_iocb,
5945                             0, 0, 0, 0, 0, 0);
5946                         tgt->link_reinit_iocb_pending = 0;
5947                 }
5948                 break;
5949         }
5950
5951         case MBA_LIP_OCCURRED:
5952         case MBA_LOOP_DOWN:
5953         case MBA_LIP_RESET:
5954         case MBA_RSCN_UPDATE:
5955                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5956                     "qla_target(%d): Async event %#x occurred "
5957                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5958                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5959                 break;
5960
5961         case MBA_REJECTED_FCP_CMD:
5962                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5963                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5964                     vha->vp_idx,
5965                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5966
5967                 if (mailbox[3] == 1) {
5968                         /* exchange starvation. */
5969                         vha->hw->exch_starvation++;
5970                         if (vha->hw->exch_starvation > 5) {
5971                                 ql_log(ql_log_warn, vha, 0xd03a,
5972                                     "Exchange starvation-. Resetting RISC\n");
5973
5974                                 vha->hw->exch_starvation = 0;
5975                                 if (IS_P3P_TYPE(vha->hw))
5976                                         set_bit(FCOE_CTX_RESET_NEEDED,
5977                                             &vha->dpc_flags);
5978                                 else
5979                                         set_bit(ISP_ABORT_NEEDED,
5980                                             &vha->dpc_flags);
5981                                 qla2xxx_wake_dpc(vha);
5982                         }
5983                 }
5984                 break;
5985
5986         case MBA_PORT_UPDATE:
5987                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5988                     "qla_target(%d): Port update async event %#x "
5989                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5990                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5991                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
5992
5993                 login_code = mailbox[2];
5994                 if (login_code == 0x4) {
5995                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5996                             "Async MB 2: Got PLOGI Complete\n");
5997                         vha->hw->exch_starvation = 0;
5998                 } else if (login_code == 0x7)
5999                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6000                             "Async MB 2: Port Logged Out\n");
6001                 break;
6002         default:
6003                 break;
6004         }
6005
6006 }
6007
6008 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6009         uint16_t loop_id)
6010 {
6011         fc_port_t *fcport, *tfcp, *del;
6012         int rc;
6013         unsigned long flags;
6014         u8 newfcport = 0;
6015
6016         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6017         if (!fcport) {
6018                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6019                     "qla_target(%d): Allocation of tmp FC port failed",
6020                     vha->vp_idx);
6021                 return NULL;
6022         }
6023
6024         fcport->loop_id = loop_id;
6025
6026         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6027         if (rc != QLA_SUCCESS) {
6028                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6029                     "qla_target(%d): Failed to retrieve fcport "
6030                     "information -- get_port_database() returned %x "
6031                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6032                 kfree(fcport);
6033                 return NULL;
6034         }
6035
6036         del = NULL;
6037         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6038         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6039
6040         if (tfcp) {
6041                 tfcp->d_id = fcport->d_id;
6042                 tfcp->port_type = fcport->port_type;
6043                 tfcp->supported_classes = fcport->supported_classes;
6044                 tfcp->flags |= fcport->flags;
6045                 tfcp->scan_state = QLA_FCPORT_FOUND;
6046
6047                 del = fcport;
6048                 fcport = tfcp;
6049         } else {
6050                 if (vha->hw->current_topology == ISP_CFG_F)
6051                         fcport->flags |= FCF_FABRIC_DEVICE;
6052
6053                 list_add_tail(&fcport->list, &vha->vp_fcports);
6054                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6055                    vha->fcport_count++;
6056                 fcport->login_gen++;
6057                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6058                 fcport->login_succ = 1;
6059                 newfcport = 1;
6060         }
6061
6062         fcport->deleted = 0;
6063         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6064
6065         switch (vha->host->active_mode) {
6066         case MODE_INITIATOR:
6067         case MODE_DUAL:
6068                 if (newfcport) {
6069                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6070                                 qla24xx_sched_upd_fcport(fcport);
6071                         } else {
6072                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6073                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6074                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6075                                 qla24xx_post_gpsc_work(vha, fcport);
6076                         }
6077                 }
6078                 break;
6079
6080         case MODE_TARGET:
6081         default:
6082                 break;
6083         }
6084         if (del)
6085                 qla2x00_free_fcport(del);
6086
6087         return fcport;
6088 }
6089
6090 /* Must be called under tgt_mutex */
6091 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6092                                            be_id_t s_id)
6093 {
6094         struct fc_port *sess = NULL;
6095         fc_port_t *fcport = NULL;
6096         int rc, global_resets;
6097         uint16_t loop_id = 0;
6098
6099         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6100                 /*
6101                  * This is Domain Controller, so it should be
6102                  * OK to drop SCSI commands from it.
6103                  */
6104                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6105                     "Unable to find initiator with S_ID %x:%x:%x",
6106                     s_id.domain, s_id.area, s_id.al_pa);
6107                 return NULL;
6108         }
6109
6110         mutex_lock(&vha->vha_tgt.tgt_mutex);
6111
6112 retry:
6113         global_resets =
6114             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6115
6116         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6117         if (rc != 0) {
6118                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6119
6120                 ql_log(ql_log_info, vha, 0xf071,
6121                     "qla_target(%d): Unable to find "
6122                     "initiator with S_ID %x:%x:%x",
6123                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6124
6125                 if (rc == -ENOENT) {
6126                         qlt_port_logo_t logo;
6127
6128                         logo.id = be_to_port_id(s_id);
6129                         logo.cmd_count = 1;
6130                         qlt_send_first_logo(vha, &logo);
6131                 }
6132
6133                 return NULL;
6134         }
6135
6136         fcport = qlt_get_port_database(vha, loop_id);
6137         if (!fcport) {
6138                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6139                 return NULL;
6140         }
6141
6142         if (global_resets !=
6143             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6144                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6145                     "qla_target(%d): global reset during session discovery "
6146                     "(counter was %d, new %d), retrying", vha->vp_idx,
6147                     global_resets,
6148                     atomic_read(&vha->vha_tgt.
6149                         qla_tgt->tgt_global_resets_count));
6150                 goto retry;
6151         }
6152
6153         sess = qlt_create_sess(vha, fcport, true);
6154
6155         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6156
6157         return sess;
6158 }
6159
6160 static void qlt_abort_work(struct qla_tgt *tgt,
6161         struct qla_tgt_sess_work_param *prm)
6162 {
6163         struct scsi_qla_host *vha = tgt->vha;
6164         struct qla_hw_data *ha = vha->hw;
6165         struct fc_port *sess = NULL;
6166         unsigned long flags = 0, flags2 = 0;
6167         be_id_t s_id;
6168         int rc;
6169
6170         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6171
6172         if (tgt->tgt_stop)
6173                 goto out_term2;
6174
6175         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6176
6177         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6178         if (!sess) {
6179                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6180
6181                 sess = qlt_make_local_sess(vha, s_id);
6182                 /* sess has got an extra creation ref */
6183
6184                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6185                 if (!sess)
6186                         goto out_term2;
6187         } else {
6188                 if (sess->deleted) {
6189                         sess = NULL;
6190                         goto out_term2;
6191                 }
6192
6193                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6194                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6195                             "%s: kref_get fail %8phC \n",
6196                              __func__, sess->port_name);
6197                         sess = NULL;
6198                         goto out_term2;
6199                 }
6200         }
6201
6202         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6203         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6204
6205         ha->tgt.tgt_ops->put_sess(sess);
6206
6207         if (rc != 0)
6208                 goto out_term;
6209         return;
6210
6211 out_term2:
6212         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6213
6214 out_term:
6215         spin_lock_irqsave(&ha->hardware_lock, flags);
6216         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6217             FCP_TMF_REJECTED, false);
6218         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6219 }
6220
6221 static void qlt_tmr_work(struct qla_tgt *tgt,
6222         struct qla_tgt_sess_work_param *prm)
6223 {
6224         struct atio_from_isp *a = &prm->tm_iocb2;
6225         struct scsi_qla_host *vha = tgt->vha;
6226         struct qla_hw_data *ha = vha->hw;
6227         struct fc_port *sess;
6228         unsigned long flags;
6229         be_id_t s_id;
6230         int rc;
6231         u64 unpacked_lun;
6232         int fn;
6233         void *iocb;
6234
6235         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6236
6237         if (tgt->tgt_stop)
6238                 goto out_term2;
6239
6240         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6241         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6242         if (!sess) {
6243                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6244
6245                 sess = qlt_make_local_sess(vha, s_id);
6246                 /* sess has got an extra creation ref */
6247
6248                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6249                 if (!sess)
6250                         goto out_term2;
6251         } else {
6252                 if (sess->deleted) {
6253                         goto out_term2;
6254                 }
6255
6256                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6257                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6258                             "%s: kref_get fail %8phC\n",
6259                              __func__, sess->port_name);
6260                         goto out_term2;
6261                 }
6262         }
6263
6264         iocb = a;
6265         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6266         unpacked_lun =
6267             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6268
6269         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6270         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6271
6272         ha->tgt.tgt_ops->put_sess(sess);
6273
6274         if (rc != 0)
6275                 goto out_term;
6276         return;
6277
6278 out_term2:
6279         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6280 out_term:
6281         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6282 }
6283
6284 static void qlt_sess_work_fn(struct work_struct *work)
6285 {
6286         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6287         struct scsi_qla_host *vha = tgt->vha;
6288         unsigned long flags;
6289
6290         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6291
6292         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6293         while (!list_empty(&tgt->sess_works_list)) {
6294                 struct qla_tgt_sess_work_param *prm = list_entry(
6295                     tgt->sess_works_list.next, typeof(*prm),
6296                     sess_works_list_entry);
6297
6298                 /*
6299                  * This work can be scheduled on several CPUs at time, so we
6300                  * must delete the entry to eliminate double processing
6301                  */
6302                 list_del(&prm->sess_works_list_entry);
6303
6304                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6305
6306                 switch (prm->type) {
6307                 case QLA_TGT_SESS_WORK_ABORT:
6308                         qlt_abort_work(tgt, prm);
6309                         break;
6310                 case QLA_TGT_SESS_WORK_TM:
6311                         qlt_tmr_work(tgt, prm);
6312                         break;
6313                 default:
6314                         BUG_ON(1);
6315                         break;
6316                 }
6317
6318                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6319
6320                 kfree(prm);
6321         }
6322         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6323 }
6324
6325 /* Must be called under tgt_host_action_mutex */
6326 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6327 {
6328         struct qla_tgt *tgt;
6329         int rc, i;
6330         struct qla_qpair_hint *h;
6331
6332         if (!QLA_TGT_MODE_ENABLED())
6333                 return 0;
6334
6335         if (!IS_TGT_MODE_CAPABLE(ha)) {
6336                 ql_log(ql_log_warn, base_vha, 0xe070,
6337                     "This adapter does not support target mode.\n");
6338                 return 0;
6339         }
6340
6341         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6342             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6343
6344         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6345
6346         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6347         if (!tgt) {
6348                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6349                     "Unable to allocate struct qla_tgt\n");
6350                 return -ENOMEM;
6351         }
6352
6353         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6354                                sizeof(struct qla_qpair_hint),
6355                                GFP_KERNEL);
6356         if (!tgt->qphints) {
6357                 kfree(tgt);
6358                 ql_log(ql_log_warn, base_vha, 0x0197,
6359                     "Unable to allocate qpair hints.\n");
6360                 return -ENOMEM;
6361         }
6362
6363         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6364                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6365
6366         rc = btree_init64(&tgt->lun_qpair_map);
6367         if (rc) {
6368                 kfree(tgt->qphints);
6369                 kfree(tgt);
6370                 ql_log(ql_log_info, base_vha, 0x0198,
6371                         "Unable to initialize lun_qpair_map btree\n");
6372                 return -EIO;
6373         }
6374         h = &tgt->qphints[0];
6375         h->qpair = ha->base_qpair;
6376         INIT_LIST_HEAD(&h->hint_elem);
6377         h->cpuid = ha->base_qpair->cpuid;
6378         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6379
6380         for (i = 0; i < ha->max_qpairs; i++) {
6381                 unsigned long flags;
6382
6383                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6384
6385                 h = &tgt->qphints[i + 1];
6386                 INIT_LIST_HEAD(&h->hint_elem);
6387                 if (qpair) {
6388                         h->qpair = qpair;
6389                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6390                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6391                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6392                         h->cpuid = qpair->cpuid;
6393                 }
6394         }
6395
6396         tgt->ha = ha;
6397         tgt->vha = base_vha;
6398         init_waitqueue_head(&tgt->waitQ);
6399         INIT_LIST_HEAD(&tgt->del_sess_list);
6400         spin_lock_init(&tgt->sess_work_lock);
6401         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6402         INIT_LIST_HEAD(&tgt->sess_works_list);
6403         atomic_set(&tgt->tgt_global_resets_count, 0);
6404
6405         base_vha->vha_tgt.qla_tgt = tgt;
6406
6407         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6408                 "qla_target(%d): using 64 Bit PCI addressing",
6409                 base_vha->vp_idx);
6410         /* 3 is reserved */
6411         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6412
6413         mutex_lock(&qla_tgt_mutex);
6414         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6415         mutex_unlock(&qla_tgt_mutex);
6416
6417         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6418                 ha->tgt.tgt_ops->add_target(base_vha);
6419
6420         return 0;
6421 }
6422
6423 /* Must be called under tgt_host_action_mutex */
6424 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6425 {
6426         if (!vha->vha_tgt.qla_tgt)
6427                 return 0;
6428
6429         if (vha->fc_vport) {
6430                 qlt_release(vha->vha_tgt.qla_tgt);
6431                 return 0;
6432         }
6433
6434         /* free left over qfull cmds */
6435         qlt_init_term_exchange(vha);
6436
6437         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6438             vha->host_no, ha);
6439         qlt_release(vha->vha_tgt.qla_tgt);
6440
6441         return 0;
6442 }
6443
6444 void qlt_remove_target_resources(struct qla_hw_data *ha)
6445 {
6446         struct scsi_qla_host *node;
6447         u32 key = 0;
6448
6449         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6450                 btree_remove32(&ha->tgt.host_map, key);
6451
6452         btree_destroy32(&ha->tgt.host_map);
6453 }
6454
6455 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6456         unsigned char *b)
6457 {
6458         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6459         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6460         put_unaligned_be64(wwpn, b);
6461         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6462 }
6463
6464 /**
6465  * qla_tgt_lport_register - register lport with external module
6466  *
6467  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6468  * @phys_wwpn: physical port WWPN
6469  * @npiv_wwpn: NPIV WWPN
6470  * @npiv_wwnn: NPIV WWNN
6471  * @callback:  lport initialization callback for tcm_qla2xxx code
6472  */
6473 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6474                        u64 npiv_wwpn, u64 npiv_wwnn,
6475                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6476 {
6477         struct qla_tgt *tgt;
6478         struct scsi_qla_host *vha;
6479         struct qla_hw_data *ha;
6480         struct Scsi_Host *host;
6481         unsigned long flags;
6482         int rc;
6483         u8 b[WWN_SIZE];
6484
6485         mutex_lock(&qla_tgt_mutex);
6486         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6487                 vha = tgt->vha;
6488                 ha = vha->hw;
6489
6490                 host = vha->host;
6491                 if (!host)
6492                         continue;
6493
6494                 if (!(host->hostt->supported_mode & MODE_TARGET))
6495                         continue;
6496
6497                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6498                         continue;
6499
6500                 spin_lock_irqsave(&ha->hardware_lock, flags);
6501                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6502                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6503                             host->host_no);
6504                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6505                         continue;
6506                 }
6507                 if (tgt->tgt_stop) {
6508                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6509                                  host->host_no);
6510                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6511                         continue;
6512                 }
6513                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6514
6515                 if (!scsi_host_get(host)) {
6516                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6517                             "Unable to scsi_host_get() for"
6518                             " qla2xxx scsi_host\n");
6519                         continue;
6520                 }
6521                 qlt_lport_dump(vha, phys_wwpn, b);
6522
6523                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6524                         scsi_host_put(host);
6525                         continue;
6526                 }
6527                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6528                 if (rc != 0)
6529                         scsi_host_put(host);
6530
6531                 mutex_unlock(&qla_tgt_mutex);
6532                 return rc;
6533         }
6534         mutex_unlock(&qla_tgt_mutex);
6535
6536         return -ENODEV;
6537 }
6538 EXPORT_SYMBOL(qlt_lport_register);
6539
6540 /**
6541  * qla_tgt_lport_deregister - Degister lport
6542  *
6543  * @vha:  Registered scsi_qla_host pointer
6544  */
6545 void qlt_lport_deregister(struct scsi_qla_host *vha)
6546 {
6547         struct qla_hw_data *ha = vha->hw;
6548         struct Scsi_Host *sh = vha->host;
6549         /*
6550          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6551          */
6552         vha->vha_tgt.target_lport_ptr = NULL;
6553         ha->tgt.tgt_ops = NULL;
6554         /*
6555          * Release the Scsi_Host reference for the underlying qla2xxx host
6556          */
6557         scsi_host_put(sh);
6558 }
6559 EXPORT_SYMBOL(qlt_lport_deregister);
6560
6561 /* Must be called under HW lock */
6562 void qlt_set_mode(struct scsi_qla_host *vha)
6563 {
6564         switch (vha->qlini_mode) {
6565         case QLA2XXX_INI_MODE_DISABLED:
6566         case QLA2XXX_INI_MODE_EXCLUSIVE:
6567                 vha->host->active_mode = MODE_TARGET;
6568                 break;
6569         case QLA2XXX_INI_MODE_ENABLED:
6570                 vha->host->active_mode = MODE_INITIATOR;
6571                 break;
6572         case QLA2XXX_INI_MODE_DUAL:
6573                 vha->host->active_mode = MODE_DUAL;
6574                 break;
6575         default:
6576                 break;
6577         }
6578 }
6579
6580 /* Must be called under HW lock */
6581 static void qlt_clear_mode(struct scsi_qla_host *vha)
6582 {
6583         switch (vha->qlini_mode) {
6584         case QLA2XXX_INI_MODE_DISABLED:
6585                 vha->host->active_mode = MODE_UNKNOWN;
6586                 break;
6587         case QLA2XXX_INI_MODE_EXCLUSIVE:
6588                 vha->host->active_mode = MODE_INITIATOR;
6589                 break;
6590         case QLA2XXX_INI_MODE_ENABLED:
6591         case QLA2XXX_INI_MODE_DUAL:
6592                 vha->host->active_mode = MODE_INITIATOR;
6593                 break;
6594         default:
6595                 break;
6596         }
6597 }
6598
6599 /*
6600  * qla_tgt_enable_vha - NO LOCK HELD
6601  *
6602  * host_reset, bring up w/ Target Mode Enabled
6603  */
6604 void
6605 qlt_enable_vha(struct scsi_qla_host *vha)
6606 {
6607         struct qla_hw_data *ha = vha->hw;
6608         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6609         unsigned long flags;
6610         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6611
6612         if (!tgt) {
6613                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6614                     "Unable to locate qla_tgt pointer from"
6615                     " struct qla_hw_data\n");
6616                 dump_stack();
6617                 return;
6618         }
6619         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6620                 return;
6621
6622         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6623                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6624         spin_lock_irqsave(&ha->hardware_lock, flags);
6625         tgt->tgt_stopped = 0;
6626         qlt_set_mode(vha);
6627         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6628
6629         mutex_lock(&ha->optrom_mutex);
6630         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6631             "%s.\n", __func__);
6632         if (vha->vp_idx) {
6633                 qla24xx_disable_vp(vha);
6634                 qla24xx_enable_vp(vha);
6635         } else {
6636                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6637                 qla2xxx_wake_dpc(base_vha);
6638                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6639                              QLA_SUCCESS);
6640         }
6641         mutex_unlock(&ha->optrom_mutex);
6642 }
6643 EXPORT_SYMBOL(qlt_enable_vha);
6644
6645 /*
6646  * qla_tgt_disable_vha - NO LOCK HELD
6647  *
6648  * Disable Target Mode and reset the adapter
6649  */
6650 static void qlt_disable_vha(struct scsi_qla_host *vha)
6651 {
6652         struct qla_hw_data *ha = vha->hw;
6653         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6654         unsigned long flags;
6655
6656         if (!tgt) {
6657                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6658                     "Unable to locate qla_tgt pointer from"
6659                     " struct qla_hw_data\n");
6660                 dump_stack();
6661                 return;
6662         }
6663
6664         spin_lock_irqsave(&ha->hardware_lock, flags);
6665         qlt_clear_mode(vha);
6666         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6667
6668         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6669         qla2xxx_wake_dpc(vha);
6670
6671         /*
6672          * We are expecting the offline state.
6673          * QLA_FUNCTION_FAILED means that adapter is offline.
6674          */
6675         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6676                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6677                        "adapter is offline\n");
6678 }
6679
6680 /*
6681  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6682  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6683  * members.
6684  */
6685 void
6686 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6687 {
6688         vha->vha_tgt.qla_tgt = NULL;
6689
6690         mutex_init(&vha->vha_tgt.tgt_mutex);
6691         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6692
6693         qlt_clear_mode(vha);
6694
6695         /*
6696          * NOTE: Currently the value is kept the same for <24xx and
6697          * >=24xx ISPs. If it is necessary to change it,
6698          * the check should be added for specific ISPs,
6699          * assigning the value appropriately.
6700          */
6701         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6702
6703         qlt_add_target(ha, vha);
6704 }
6705
6706 u8
6707 qlt_rff_id(struct scsi_qla_host *vha)
6708 {
6709         u8 fc4_feature = 0;
6710         /*
6711          * FC-4 Feature bit 0 indicates target functionality to the name server.
6712          */
6713         if (qla_tgt_mode_enabled(vha)) {
6714                 fc4_feature = BIT_0;
6715         } else if (qla_ini_mode_enabled(vha)) {
6716                 fc4_feature = BIT_1;
6717         } else if (qla_dual_mode_enabled(vha))
6718                 fc4_feature = BIT_0 | BIT_1;
6719
6720         return fc4_feature;
6721 }
6722
6723 /*
6724  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6725  * @ha: HA context
6726  *
6727  * Beginning of ATIO ring has initialization control block already built
6728  * by nvram config routine.
6729  *
6730  * Returns 0 on success.
6731  */
6732 void
6733 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6734 {
6735         struct qla_hw_data *ha = vha->hw;
6736         uint16_t cnt;
6737         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6738
6739         if (qla_ini_mode_enabled(vha))
6740                 return;
6741
6742         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6743                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6744                 pkt++;
6745         }
6746
6747 }
6748
6749 /*
6750  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6751  * @ha: SCSI driver HA context
6752  */
6753 void
6754 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6755 {
6756         struct qla_hw_data *ha = vha->hw;
6757         struct atio_from_isp *pkt;
6758         int cnt, i;
6759
6760         if (!ha->flags.fw_started)
6761                 return;
6762
6763         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6764             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6765                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6766                 cnt = pkt->u.raw.entry_count;
6767
6768                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6769                         /*
6770                          * This packet is corrupted. The header + payload
6771                          * can not be trusted. There is no point in passing
6772                          * it further up.
6773                          */
6774                         ql_log(ql_log_warn, vha, 0xd03c,
6775                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6776                             &pkt->u.isp24.fcp_hdr.s_id,
6777                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6778                             pkt->u.isp24.exchange_addr, pkt);
6779
6780                         adjust_corrupted_atio(pkt);
6781                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6782                             ha_locked, 0);
6783                 } else {
6784                         qlt_24xx_atio_pkt_all_vps(vha,
6785                             (struct atio_from_isp *)pkt, ha_locked);
6786                 }
6787
6788                 for (i = 0; i < cnt; i++) {
6789                         ha->tgt.atio_ring_index++;
6790                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6791                                 ha->tgt.atio_ring_index = 0;
6792                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6793                         } else
6794                                 ha->tgt.atio_ring_ptr++;
6795
6796                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6797                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6798                 }
6799                 wmb();
6800         }
6801
6802         /* Adjust ring index */
6803         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6804 }
6805
6806 void
6807 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6808 {
6809         struct qla_hw_data *ha = vha->hw;
6810         struct qla_msix_entry *msix = &ha->msix_entries[2];
6811         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6812
6813         if (!QLA_TGT_MODE_ENABLED())
6814                 return;
6815
6816         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6817         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6818         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6819
6820         if (ha->flags.msix_enabled) {
6821                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6822                         if (IS_QLA2071(ha)) {
6823                                 /* 4 ports Baker: Enable Interrupt Handshake */
6824                                 icb->msix_atio = 0;
6825                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6826                         } else {
6827                                 icb->msix_atio = cpu_to_le16(msix->entry);
6828                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6829                         }
6830                         ql_dbg(ql_dbg_init, vha, 0xf072,
6831                             "Registering ICB vector 0x%x for atio que.\n",
6832                             msix->entry);
6833                 }
6834         } else {
6835                 /* INTx|MSI */
6836                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6837                         icb->msix_atio = 0;
6838                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6839                         ql_dbg(ql_dbg_init, vha, 0xf072,
6840                             "%s: Use INTx for ATIOQ.\n", __func__);
6841                 }
6842         }
6843 }
6844
6845 void
6846 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6847 {
6848         struct qla_hw_data *ha = vha->hw;
6849         u32 tmp;
6850
6851         if (!QLA_TGT_MODE_ENABLED())
6852                 return;
6853
6854         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6855                 if (!ha->tgt.saved_set) {
6856                         /* We save only once */
6857                         ha->tgt.saved_exchange_count = nv->exchange_count;
6858                         ha->tgt.saved_firmware_options_1 =
6859                             nv->firmware_options_1;
6860                         ha->tgt.saved_firmware_options_2 =
6861                             nv->firmware_options_2;
6862                         ha->tgt.saved_firmware_options_3 =
6863                             nv->firmware_options_3;
6864                         ha->tgt.saved_set = 1;
6865                 }
6866
6867                 if (qla_tgt_mode_enabled(vha))
6868                         nv->exchange_count = cpu_to_le16(0xFFFF);
6869                 else                    /* dual */
6870                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6871
6872                 /* Enable target mode */
6873                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6874
6875                 /* Disable ini mode, if requested */
6876                 if (qla_tgt_mode_enabled(vha))
6877                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6878
6879                 /* Disable Full Login after LIP */
6880                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6881                 /* Enable initial LIP */
6882                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6883                 if (ql2xtgt_tape_enable)
6884                         /* Enable FC Tape support */
6885                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6886                 else
6887                         /* Disable FC Tape support */
6888                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6889
6890                 /* Disable Full Login after LIP */
6891                 nv->host_p &= cpu_to_le32(~BIT_10);
6892
6893                 /*
6894                  * clear BIT 15 explicitly as we have seen at least
6895                  * a couple of instances where this was set and this
6896                  * was causing the firmware to not be initialized.
6897                  */
6898                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6899                 /* Enable target PRLI control */
6900                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6901
6902                 if (IS_QLA25XX(ha)) {
6903                         /* Change Loop-prefer to Pt-Pt */
6904                         tmp = ~(BIT_4|BIT_5|BIT_6);
6905                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6906                         tmp = P2P << 4;
6907                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6908                 }
6909         } else {
6910                 if (ha->tgt.saved_set) {
6911                         nv->exchange_count = ha->tgt.saved_exchange_count;
6912                         nv->firmware_options_1 =
6913                             ha->tgt.saved_firmware_options_1;
6914                         nv->firmware_options_2 =
6915                             ha->tgt.saved_firmware_options_2;
6916                         nv->firmware_options_3 =
6917                             ha->tgt.saved_firmware_options_3;
6918                 }
6919                 return;
6920         }
6921
6922         if (ha->base_qpair->enable_class_2) {
6923                 if (vha->flags.init_done)
6924                         fc_host_supported_classes(vha->host) =
6925                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6926
6927                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6928         } else {
6929                 if (vha->flags.init_done)
6930                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6931
6932                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6933         }
6934 }
6935
6936 void
6937 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6938         struct init_cb_24xx *icb)
6939 {
6940         struct qla_hw_data *ha = vha->hw;
6941
6942         if (!QLA_TGT_MODE_ENABLED())
6943                 return;
6944
6945         if (ha->tgt.node_name_set) {
6946                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6947                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6948         }
6949 }
6950
6951 void
6952 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6953 {
6954         struct qla_hw_data *ha = vha->hw;
6955         u32 tmp;
6956
6957         if (!QLA_TGT_MODE_ENABLED())
6958                 return;
6959
6960         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6961                 if (!ha->tgt.saved_set) {
6962                         /* We save only once */
6963                         ha->tgt.saved_exchange_count = nv->exchange_count;
6964                         ha->tgt.saved_firmware_options_1 =
6965                             nv->firmware_options_1;
6966                         ha->tgt.saved_firmware_options_2 =
6967                             nv->firmware_options_2;
6968                         ha->tgt.saved_firmware_options_3 =
6969                             nv->firmware_options_3;
6970                         ha->tgt.saved_set = 1;
6971                 }
6972
6973                 if (qla_tgt_mode_enabled(vha))
6974                         nv->exchange_count = cpu_to_le16(0xFFFF);
6975                 else                    /* dual */
6976                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6977
6978                 /* Enable target mode */
6979                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6980
6981                 /* Disable ini mode, if requested */
6982                 if (qla_tgt_mode_enabled(vha))
6983                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6984                 /* Disable Full Login after LIP */
6985                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6986                 /* Enable initial LIP */
6987                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6988                 /*
6989                  * clear BIT 15 explicitly as we have seen at
6990                  * least a couple of instances where this was set
6991                  * and this was causing the firmware to not be
6992                  * initialized.
6993                  */
6994                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6995                 if (ql2xtgt_tape_enable)
6996                         /* Enable FC tape support */
6997                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6998                 else
6999                         /* Disable FC tape support */
7000                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7001
7002                 /* Disable Full Login after LIP */
7003                 nv->host_p &= cpu_to_le32(~BIT_10);
7004                 /* Enable target PRLI control */
7005                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7006
7007                 /* Change Loop-prefer to Pt-Pt */
7008                 tmp = ~(BIT_4|BIT_5|BIT_6);
7009                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7010                 tmp = P2P << 4;
7011                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7012         } else {
7013                 if (ha->tgt.saved_set) {
7014                         nv->exchange_count = ha->tgt.saved_exchange_count;
7015                         nv->firmware_options_1 =
7016                             ha->tgt.saved_firmware_options_1;
7017                         nv->firmware_options_2 =
7018                             ha->tgt.saved_firmware_options_2;
7019                         nv->firmware_options_3 =
7020                             ha->tgt.saved_firmware_options_3;
7021                 }
7022                 return;
7023         }
7024
7025         if (ha->base_qpair->enable_class_2) {
7026                 if (vha->flags.init_done)
7027                         fc_host_supported_classes(vha->host) =
7028                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7029
7030                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7031         } else {
7032                 if (vha->flags.init_done)
7033                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7034
7035                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7036         }
7037 }
7038
7039 void
7040 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7041         struct init_cb_81xx *icb)
7042 {
7043         struct qla_hw_data *ha = vha->hw;
7044
7045         if (!QLA_TGT_MODE_ENABLED())
7046                 return;
7047
7048         if (ha->tgt.node_name_set) {
7049                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7050                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7051         }
7052 }
7053
7054 void
7055 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7056 {
7057         if (!QLA_TGT_MODE_ENABLED())
7058                 return;
7059
7060         ha->msix_count += 1; /* For ATIO Q */
7061 }
7062
7063
7064 void
7065 qlt_modify_vp_config(struct scsi_qla_host *vha,
7066         struct vp_config_entry_24xx *vpmod)
7067 {
7068         /* enable target mode.  Bit5 = 1 => disable */
7069         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7070                 vpmod->options_idx1 &= ~BIT_5;
7071
7072         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7073         if (qla_tgt_mode_enabled(vha))
7074                 vpmod->options_idx1 &= ~BIT_4;
7075 }
7076
7077 void
7078 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7079 {
7080         int rc;
7081
7082         if (!QLA_TGT_MODE_ENABLED())
7083                 return;
7084
7085         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7086             IS_QLA28XX(ha)) {
7087                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7088                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7089         } else {
7090                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7091                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7092         }
7093
7094         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7095         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7096
7097         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7098         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7099             qlt_unknown_atio_work_fn);
7100
7101         qlt_clear_mode(base_vha);
7102
7103         rc = btree_init32(&ha->tgt.host_map);
7104         if (rc)
7105                 ql_log(ql_log_info, base_vha, 0xd03d,
7106                     "Unable to initialize ha->host_map btree\n");
7107
7108         qlt_update_vp_map(base_vha, SET_VP_IDX);
7109 }
7110
7111 irqreturn_t
7112 qla83xx_msix_atio_q(int irq, void *dev_id)
7113 {
7114         struct rsp_que *rsp;
7115         scsi_qla_host_t *vha;
7116         struct qla_hw_data *ha;
7117         unsigned long flags;
7118
7119         rsp = (struct rsp_que *) dev_id;
7120         ha = rsp->hw;
7121         vha = pci_get_drvdata(ha->pdev);
7122
7123         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7124
7125         qlt_24xx_process_atio_queue(vha, 0);
7126
7127         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7128
7129         return IRQ_HANDLED;
7130 }
7131
7132 static void
7133 qlt_handle_abts_recv_work(struct work_struct *work)
7134 {
7135         struct qla_tgt_sess_op *op = container_of(work,
7136                 struct qla_tgt_sess_op, work);
7137         scsi_qla_host_t *vha = op->vha;
7138         struct qla_hw_data *ha = vha->hw;
7139         unsigned long flags;
7140
7141         if (qla2x00_reset_active(vha) ||
7142             (op->chip_reset != ha->base_qpair->chip_reset))
7143                 return;
7144
7145         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7146         qlt_24xx_process_atio_queue(vha, 0);
7147         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7148
7149         spin_lock_irqsave(&ha->hardware_lock, flags);
7150         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7151         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7152
7153         kfree(op);
7154 }
7155
7156 void
7157 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7158     response_t *pkt)
7159 {
7160         struct qla_tgt_sess_op *op;
7161
7162         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7163
7164         if (!op) {
7165                 /* do not reach for ATIO queue here.  This is best effort err
7166                  * recovery at this point.
7167                  */
7168                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7169                 return;
7170         }
7171
7172         memcpy(&op->atio, pkt, sizeof(*pkt));
7173         op->vha = vha;
7174         op->chip_reset = vha->hw->base_qpair->chip_reset;
7175         op->rsp = rsp;
7176         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7177         queue_work(qla_tgt_wq, &op->work);
7178         return;
7179 }
7180
7181 int
7182 qlt_mem_alloc(struct qla_hw_data *ha)
7183 {
7184         if (!QLA_TGT_MODE_ENABLED())
7185                 return 0;
7186
7187         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7188                                      sizeof(struct qla_tgt_vp_map),
7189                                      GFP_KERNEL);
7190         if (!ha->tgt.tgt_vp_map)
7191                 return -ENOMEM;
7192
7193         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7194             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7195             &ha->tgt.atio_dma, GFP_KERNEL);
7196         if (!ha->tgt.atio_ring) {
7197                 kfree(ha->tgt.tgt_vp_map);
7198                 return -ENOMEM;
7199         }
7200         return 0;
7201 }
7202
7203 void
7204 qlt_mem_free(struct qla_hw_data *ha)
7205 {
7206         if (!QLA_TGT_MODE_ENABLED())
7207                 return;
7208
7209         if (ha->tgt.atio_ring) {
7210                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7211                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7212                     ha->tgt.atio_dma);
7213         }
7214         ha->tgt.atio_ring = NULL;
7215         ha->tgt.atio_dma = 0;
7216         kfree(ha->tgt.tgt_vp_map);
7217         ha->tgt.tgt_vp_map = NULL;
7218 }
7219
7220 /* vport_slock to be held by the caller */
7221 void
7222 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7223 {
7224         void *slot;
7225         u32 key;
7226         int rc;
7227
7228         if (!QLA_TGT_MODE_ENABLED())
7229                 return;
7230
7231         key = vha->d_id.b24;
7232
7233         switch (cmd) {
7234         case SET_VP_IDX:
7235                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7236                 break;
7237         case SET_AL_PA:
7238                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7239                 if (!slot) {
7240                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7241                             "Save vha in host_map %p %06x\n", vha, key);
7242                         rc = btree_insert32(&vha->hw->tgt.host_map,
7243                                 key, vha, GFP_ATOMIC);
7244                         if (rc)
7245                                 ql_log(ql_log_info, vha, 0xd03e,
7246                                     "Unable to insert s_id into host_map: %06x\n",
7247                                     key);
7248                         return;
7249                 }
7250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7251                     "replace existing vha in host_map %p %06x\n", vha, key);
7252                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7253                 break;
7254         case RESET_VP_IDX:
7255                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7256                 break;
7257         case RESET_AL_PA:
7258                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7259                    "clear vha in host_map %p %06x\n", vha, key);
7260                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7261                 if (slot)
7262                         btree_remove32(&vha->hw->tgt.host_map, key);
7263                 vha->d_id.b24 = 0;
7264                 break;
7265         }
7266 }
7267
7268 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7269 {
7270
7271         if (!vha->d_id.b24) {
7272                 vha->d_id = id;
7273                 qlt_update_vp_map(vha, SET_AL_PA);
7274         } else if (vha->d_id.b24 != id.b24) {
7275                 qlt_update_vp_map(vha, RESET_AL_PA);
7276                 vha->d_id = id;
7277                 qlt_update_vp_map(vha, SET_AL_PA);
7278         }
7279 }
7280
7281 static int __init qlt_parse_ini_mode(void)
7282 {
7283         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7284                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7285         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7286                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7287         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7288                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7289         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7290                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7291         else
7292                 return false;
7293
7294         return true;
7295 }
7296
7297 int __init qlt_init(void)
7298 {
7299         int ret;
7300
7301         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7302         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7303
7304         if (!qlt_parse_ini_mode()) {
7305                 ql_log(ql_log_fatal, NULL, 0xe06b,
7306                     "qlt_parse_ini_mode() failed\n");
7307                 return -EINVAL;
7308         }
7309
7310         if (!QLA_TGT_MODE_ENABLED())
7311                 return 0;
7312
7313         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7314             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7315             qla_tgt_mgmt_cmd), 0, NULL);
7316         if (!qla_tgt_mgmt_cmd_cachep) {
7317                 ql_log(ql_log_fatal, NULL, 0xd04b,
7318                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7319                 return -ENOMEM;
7320         }
7321
7322         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7323             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7324             0, NULL);
7325
7326         if (!qla_tgt_plogi_cachep) {
7327                 ql_log(ql_log_fatal, NULL, 0xe06d,
7328                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7329                 ret = -ENOMEM;
7330                 goto out_mgmt_cmd_cachep;
7331         }
7332
7333         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7334             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7335         if (!qla_tgt_mgmt_cmd_mempool) {
7336                 ql_log(ql_log_fatal, NULL, 0xe06e,
7337                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7338                 ret = -ENOMEM;
7339                 goto out_plogi_cachep;
7340         }
7341
7342         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7343         if (!qla_tgt_wq) {
7344                 ql_log(ql_log_fatal, NULL, 0xe06f,
7345                     "alloc_workqueue for qla_tgt_wq failed\n");
7346                 ret = -ENOMEM;
7347                 goto out_cmd_mempool;
7348         }
7349         /*
7350          * Return 1 to signal that initiator-mode is being disabled
7351          */
7352         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7353
7354 out_cmd_mempool:
7355         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7356 out_plogi_cachep:
7357         kmem_cache_destroy(qla_tgt_plogi_cachep);
7358 out_mgmt_cmd_cachep:
7359         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7360         return ret;
7361 }
7362
7363 void qlt_exit(void)
7364 {
7365         if (!QLA_TGT_MODE_ENABLED())
7366                 return;
7367
7368         destroy_workqueue(qla_tgt_wq);
7369         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7370         kmem_cache_destroy(qla_tgt_plogi_cachep);
7371         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7372 }