drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 50;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  70
  71 static int temp_sam_status = SAM_STAT_BUSY;
  72
  73 /*
  74  * From scsi/fc/fc_fcp.h
  75  */
  76 enum fcp_resp_rsp_codes {
  77         FCP_TMF_CMPL = 0,
  78         FCP_DATA_LEN_INVALID = 1,
  79         FCP_CMND_FIELDS_INVALID = 2,
  80         FCP_DATA_PARAM_MISMATCH = 3,
  81         FCP_TMF_REJECTED = 4,
  82         FCP_TMF_FAILED = 5,
  83         FCP_TMF_INVALID_LUN = 9,
  84 };
  85
  86 /*
  87  * fc_pri_ta from scsi/fc/fc_fcp.h
  88  */
  89 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  90 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  91 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  92 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  93 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  94 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  95 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  96
  97 /*
  98  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  99  * must be called under HW lock and could unlock/lock it inside.
 100  * It isn't an issue, since in the current implementation on the time when
 101  * those functions are called:
 102  *
 103  *   - Either context is IRQ and only IRQ handler can modify HW data,
 104  *     including rings related fields,
 105  *
 106  *   - Or access to target mode variables from struct qla_tgt doesn't
 107  *     cross those functions boundaries, except tgt_stop, which
 108  *     additionally protected by irq_cmd_count.
 109  */
 110 /* Predefs for callbacks handed to qla2xxx LLD */
 111 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 112         struct atio_from_isp *pkt, uint8_t);
 113 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 115         int fn, void *iocb, int flags);
 116 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 117         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 118 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 119         struct qla_tgt_cmd *cmd);
 120 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 121         struct atio_from_isp *atio, uint16_t status, int qfull);
 122 static void qlt_disable_vha(struct scsi_qla_host *vha);
 123 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 124 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *ntfy,
 126         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 127         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 128 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 129         struct imm_ntfy_from_isp *imm, int ha_locked);
 130 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 131         fc_port_t *fcport, bool local);
 132 void qlt_unreg_sess(struct fc_port *sess);
 133 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 134         struct abts_recv_from_24xx *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 static 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                 if (rc != QLA_SUCCESS) {
 177                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 178                             "qla_target(%d): issue_marker() failed\n",
 179                             vha->vp_idx);
 180                 }
 181                 return rc;
 182         }
 183         return QLA_SUCCESS;
 184 }
 185
 186 static inline
 187 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 188         uint8_t *d_id)
 189 {
 190         struct scsi_qla_host *host;
 191         uint32_t key = 0;
 192
 193         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 194             (vha->d_id.b.al_pa == d_id[2]))
 195                 return vha;
 196
 197         key  = (uint32_t)d_id[0] << 16;
 198         key |= (uint32_t)d_id[1] <<  8;
 199         key |= (uint32_t)d_id[2];
 200
 201         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 202         if (!host)
 203                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
 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, 0xffff,
 256                            "qla_target(%d): dropping unknown ATIO_TYPE7, "
 257                            "because tgt is being stopped", vha->vp_idx);
 258                 goto out_term;
 259         }
 260
 261         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 262         if (u == NULL) {
 263                 ql_dbg(ql_dbg_async, vha, 0xffff,
 264                     "Alloc of struct unknown_atio (size %zd) failed", sizeof(*u));
 265                 /* It should be harmless and on the next retry should work well */
 266                 goto out_term;
 267         }
 268
 269         u->vha = vha;
 270         memcpy(&u->atio, atio, sizeof(*atio));
 271         INIT_LIST_HEAD(&u->cmd_list);
 272
 273         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 274         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 275         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 276
 277         schedule_delayed_work(&vha->unknown_atio_work, 1);
 278
 279 out:
 280         return;
 281
 282 out_term:
 283         qlt_send_term_exchange(vha, NULL, atio, ha_locked, 0);
 284         goto out;
 285 }
 286
 287 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 288         uint8_t ha_locked)
 289 {
 290         struct qla_tgt_sess_op *u, *t;
 291         scsi_qla_host_t *host;
 292         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 293         unsigned long flags;
 294         uint8_t queued = 0;
 295
 296         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 297                 if (u->aborted) {
 298                         ql_dbg(ql_dbg_async, vha, 0xffff,
 299                             "Freeing unknown %s %p, because of Abort",
 300                             "ATIO_TYPE7", u);
 301                         qlt_send_term_exchange(vha, NULL, &u->atio,
 302                             ha_locked, 0);
 303                         goto abort;
 304                 }
 305
 306                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 307                 if (host != NULL) {
 308                         ql_dbg(ql_dbg_async, vha, 0xffff,
 309                                 "Requeuing unknown ATIO_TYPE7 %p", u);
 310                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 311                 } else if (tgt->tgt_stop) {
 312                         ql_dbg(ql_dbg_async, vha, 0xffff,
 313                                 "Freeing unknown %s %p, because tgt is being stopped",
 314                                 "ATIO_TYPE7", u);
 315                         qlt_send_term_exchange(vha, NULL, &u->atio,
 316                             ha_locked, 0);
 317                 } else {
 318                         ql_dbg(ql_dbg_async, vha, 0xffff,
 319                                 "u %p, vha %p, host %p, sched again..", u,
 320                                 vha, host);
 321                         if (!queued) {
 322                                 queued = 1;
 323                                 schedule_delayed_work(&vha->unknown_atio_work,
 324                                     1);
 325                         }
 326                         continue;
 327                 }
 328
 329 abort:
 330                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 331                 list_del(&u->cmd_list);
 332                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 333                 kfree(u);
 334         }
 335 }
 336
 337 void qlt_unknown_atio_work_fn(struct work_struct *work)
 338 {
 339         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 340             struct scsi_qla_host, unknown_atio_work);
 341
 342         qlt_try_to_dequeue_unknown_atios(vha, 0);
 343 }
 344
 345 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 346         struct atio_from_isp *atio, uint8_t ha_locked)
 347 {
 348         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 349                 "%s: qla_target(%d): type %x ox_id %04x\n",
 350                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 351                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 352
 353         switch (atio->u.raw.entry_type) {
 354         case ATIO_TYPE7:
 355         {
 356                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 357                     atio->u.isp24.fcp_hdr.d_id);
 358                 if (unlikely(NULL == host)) {
 359                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 360                             "qla_target(%d): Received ATIO_TYPE7 "
 361                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 362                             atio->u.isp24.fcp_hdr.d_id[0],
 363                             atio->u.isp24.fcp_hdr.d_id[1],
 364                             atio->u.isp24.fcp_hdr.d_id[2]);
 365
 366
 367                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 368                         break;
 369                 }
 370                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 371                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 372
 373                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 374                 break;
 375         }
 376
 377         case IMMED_NOTIFY_TYPE:
 378         {
 379                 struct scsi_qla_host *host = vha;
 380                 struct imm_ntfy_from_isp *entry =
 381                     (struct imm_ntfy_from_isp *)atio;
 382
 383                 if ((entry->u.isp24.vp_index != 0xFF) &&
 384                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 385                         host = qlt_find_host_by_vp_idx(vha,
 386                             entry->u.isp24.vp_index);
 387                         if (unlikely(!host)) {
 388                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 389                                     "qla_target(%d): Received "
 390                                     "ATIO (IMMED_NOTIFY_TYPE) "
 391                                     "with unknown vp_index %d\n",
 392                                     vha->vp_idx, entry->u.isp24.vp_index);
 393                                 break;
 394                         }
 395                 }
 396                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 397                 break;
 398         }
 399
 400         case VP_RPT_ID_IOCB_TYPE:
 401                 qla24xx_report_id_acquisition(vha,
 402                         (struct vp_rpt_id_entry_24xx *)atio);
 403                 break;
 404
 405         case ABTS_RECV_24XX:
 406         {
 407                 struct abts_recv_from_24xx *entry =
 408                         (struct abts_recv_from_24xx *)atio;
 409                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 410                         entry->vp_index);
 411                 unsigned long flags;
 412
 413                 if (unlikely(!host)) {
 414                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
 415                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 416                             "received, with unknown vp_index %d\n",
 417                             vha->vp_idx, entry->vp_index);
 418                         break;
 419                 }
 420                 if (!ha_locked)
 421                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 422                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 423                 if (!ha_locked)
 424                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 425                 break;
 426         }
 427
 428         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 429
 430         default:
 431                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 432                     "qla_target(%d): Received unknown ATIO atio "
 433                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 434                 break;
 435         }
 436
 437         return false;
 438 }
 439
 440 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 441 {
 442         switch (pkt->entry_type) {
 443         case CTIO_CRC2:
 444                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 445                         "qla_target(%d):%s: CRC2 Response pkt\n",
 446                         vha->vp_idx, __func__);
 447         case CTIO_TYPE7:
 448         {
 449                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 450                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 451                     entry->vp_index);
 452                 if (unlikely(!host)) {
 453                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 454                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 455                             "received, with unknown vp_index %d\n",
 456                             vha->vp_idx, entry->vp_index);
 457                         break;
 458                 }
 459                 qlt_response_pkt(host, pkt);
 460                 break;
 461         }
 462
 463         case IMMED_NOTIFY_TYPE:
 464         {
 465                 struct scsi_qla_host *host = vha;
 466                 struct imm_ntfy_from_isp *entry =
 467                     (struct imm_ntfy_from_isp *)pkt;
 468
 469                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 470                 if (unlikely(!host)) {
 471                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 472                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 473                             "received, with unknown vp_index %d\n",
 474                             vha->vp_idx, entry->u.isp24.vp_index);
 475                         break;
 476                 }
 477                 qlt_response_pkt(host, pkt);
 478                 break;
 479         }
 480
 481         case NOTIFY_ACK_TYPE:
 482         {
 483                 struct scsi_qla_host *host = vha;
 484                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 485
 486                 if (0xFF != entry->u.isp24.vp_index) {
 487                         host = qlt_find_host_by_vp_idx(vha,
 488                             entry->u.isp24.vp_index);
 489                         if (unlikely(!host)) {
 490                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 491                                     "qla_target(%d): Response "
 492                                     "pkt (NOTIFY_ACK_TYPE) "
 493                                     "received, with unknown "
 494                                     "vp_index %d\n", vha->vp_idx,
 495                                     entry->u.isp24.vp_index);
 496                                 break;
 497                         }
 498                 }
 499                 qlt_response_pkt(host, pkt);
 500                 break;
 501         }
 502
 503         case ABTS_RECV_24XX:
 504         {
 505                 struct abts_recv_from_24xx *entry =
 506                     (struct abts_recv_from_24xx *)pkt;
 507                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 508                     entry->vp_index);
 509                 if (unlikely(!host)) {
 510                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 511                             "qla_target(%d): Response pkt "
 512                             "(ABTS_RECV_24XX) received, with unknown "
 513                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 514                         break;
 515                 }
 516                 qlt_response_pkt(host, pkt);
 517                 break;
 518         }
 519
 520         case ABTS_RESP_24XX:
 521         {
 522                 struct abts_resp_to_24xx *entry =
 523                     (struct abts_resp_to_24xx *)pkt;
 524                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 525                     entry->vp_index);
 526                 if (unlikely(!host)) {
 527                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 528                             "qla_target(%d): Response pkt "
 529                             "(ABTS_RECV_24XX) received, with unknown "
 530                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 531                         break;
 532                 }
 533                 qlt_response_pkt(host, pkt);
 534                 break;
 535         }
 536
 537         default:
 538                 qlt_response_pkt(vha, pkt);
 539                 break;
 540         }
 541
 542 }
 543
 544 /*
 545  * All qlt_plogi_ack_t operations are protected by hardware_lock
 546  */
 547 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 548         struct imm_ntfy_from_isp *ntfy, int type)
 549 {
 550         struct qla_work_evt *e;
 551         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 552         if (!e)
 553                 return QLA_FUNCTION_FAILED;
 554
 555         e->u.nack.fcport = fcport;
 556         e->u.nack.type = type;
 557         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 558         return qla2x00_post_work(vha, e);
 559 }
 560
 561 static
 562 void qla2x00_async_nack_sp_done(void *s, int res)
 563 {
 564         struct srb *sp = (struct srb *)s;
 565         struct scsi_qla_host *vha = sp->vha;
 566         unsigned long flags;
 567
 568         ql_dbg(ql_dbg_disc, vha, 0xffff,
 569                 "Async done-%s res %x %8phC  type %d\n",
 570                 sp->name, res, sp->fcport->port_name, sp->type);
 571
 572         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 573         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 574         sp->fcport->chip_reset = vha->hw->chip_reset;
 575
 576         switch (sp->type) {
 577         case SRB_NACK_PLOGI:
 578                 sp->fcport->login_gen++;
 579                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 580                 sp->fcport->logout_on_delete = 1;
 581                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 582                 break;
 583
 584         case SRB_NACK_PRLI:
 585                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 586                 sp->fcport->deleted = 0;
 587
 588                 if (!sp->fcport->login_succ &&
 589                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 590                         sp->fcport->login_succ = 1;
 591
 592                         vha->fcport_count++;
 593
 594                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 595                             !vha->hw->flags.gpsc_supported) {
 596                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 597                                         "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 598                                         __func__, __LINE__,
 599                                         sp->fcport->port_name,
 600                                         vha->fcport_count);
 601
 602                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 603                         } else {
 604                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 605                                         "%s %d %8phC post gpsc fcp_cnt %d\n",
 606                                         __func__, __LINE__,
 607                                         sp->fcport->port_name,
 608                                         vha->fcport_count);
 609
 610                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 611                         }
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         sp->free(sp);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 break;
 639         case SRB_NACK_PRLI:
 640                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 641                 fcport->deleted = 0;
 642                 c = "PRLI";
 643                 break;
 644         case SRB_NACK_LOGO:
 645                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 646                 c = "LOGO";
 647                 break;
 648         }
 649
 650         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 651         if (!sp)
 652                 goto done;
 653
 654         sp->type = type;
 655         sp->name = "nack";
 656
 657         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 658
 659         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 660
 661         sp->done = qla2x00_async_nack_sp_done;
 662
 663         rval = qla2x00_start_sp(sp);
 664         if (rval != QLA_SUCCESS)
 665                 goto done_free_sp;
 666
 667         ql_dbg(ql_dbg_disc, vha, 0xffff,
 668                 "Async-%s %8phC hndl %x %s\n",
 669                 sp->name, fcport->port_name, sp->handle, c);
 670
 671         return rval;
 672
 673 done_free_sp:
 674         sp->free(sp);
 675 done:
 676         fcport->flags &= ~FCF_ASYNC_SENT;
 677         return rval;
 678 }
 679
 680 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 681 {
 682         fc_port_t *t;
 683         unsigned long flags;
 684
 685         switch (e->u.nack.type) {
 686         case SRB_NACK_PRLI:
 687                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 688                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 689                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 690                 if (t) {
 691                         ql_log(ql_log_info, vha, 0xffff,
 692                             "%s create sess success %p", __func__, t);
 693                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 694                         /* create sess has an extra kref */
 695                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 696                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 697                 }
 698                 break;
 699         }
 700         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 701             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 702 }
 703
 704 void qla24xx_delete_sess_fn(struct work_struct *work)
 705 {
 706         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 707         struct qla_hw_data *ha = fcport->vha->hw;
 708         unsigned long flags;
 709
 710         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 711
 712         if (fcport->se_sess) {
 713                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 714                 ha->tgt.tgt_ops->put_sess(fcport);
 715         } else {
 716                 qlt_unreg_sess(fcport);
 717         }
 718         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 719 }
 720
 721 /*
 722  * Called from qla2x00_reg_remote_port()
 723  */
 724 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 725 {
 726         struct qla_hw_data *ha = vha->hw;
 727         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 728         struct fc_port *sess = fcport;
 729         unsigned long flags;
 730
 731         if (!vha->hw->tgt.tgt_ops)
 732                 return;
 733
 734         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 735         if (tgt->tgt_stop) {
 736                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 737                 return;
 738         }
 739
 740         if (fcport->disc_state == DSC_DELETE_PEND) {
 741                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 742                 return;
 743         }
 744
 745         if (!sess->se_sess) {
 746                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 747
 748                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 749                 sess = qlt_create_sess(vha, fcport, false);
 750                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 751
 752                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 753         } else {
 754                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 755                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 756                         return;
 757                 }
 758
 759                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 760                         ql_dbg(ql_dbg_disc, vha, 0xffff,
 761                             "%s: kref_get fail sess %8phC \n",
 762                             __func__, sess->port_name);
 763                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 764                         return;
 765                 }
 766
 767                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 768                     "qla_target(%u): %ssession for port %8phC "
 769                     "(loop ID %d) reappeared\n", vha->vp_idx,
 770                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 771
 772                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 773                     "Reappeared sess %p\n", sess);
 774
 775                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 776                     fcport->loop_id,
 777                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 778         }
 779
 780         if (sess && sess->local) {
 781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 782                     "qla_target(%u): local session for "
 783                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 784                     fcport->port_name, sess->loop_id);
 785                 sess->local = 0;
 786         }
 787         ha->tgt.tgt_ops->put_sess(sess);
 788         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 789 }
 790
 791 /*
 792  * This is a zero-base ref-counting solution, since hardware_lock
 793  * guarantees that ref_count is not modified concurrently.
 794  * Upon successful return content of iocb is undefined
 795  */
 796 static struct qlt_plogi_ack_t *
 797 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 798                        struct imm_ntfy_from_isp *iocb)
 799 {
 800         struct qlt_plogi_ack_t *pla;
 801
 802         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 803                 if (pla->id.b24 == id->b24) {
 804                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 805                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 806                         return pla;
 807                 }
 808         }
 809
 810         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 811         if (!pla) {
 812                 ql_dbg(ql_dbg_async, vha, 0x5088,
 813                        "qla_target(%d): Allocation of plogi_ack failed\n",
 814                        vha->vp_idx);
 815                 return NULL;
 816         }
 817
 818         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 819         pla->id = *id;
 820         list_add_tail(&pla->list, &vha->plogi_ack_list);
 821
 822         return pla;
 823 }
 824
 825 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 826     struct qlt_plogi_ack_t *pla)
 827 {
 828         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 829         port_id_t port_id;
 830         uint16_t loop_id;
 831         fc_port_t *fcport = pla->fcport;
 832
 833         BUG_ON(!pla->ref_count);
 834         pla->ref_count--;
 835
 836         if (pla->ref_count)
 837                 return;
 838
 839         ql_dbg(ql_dbg_disc, vha, 0x5089,
 840             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 841             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 842             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 843             iocb->u.isp24.port_id[0],
 844             le16_to_cpu(iocb->u.isp24.nport_handle),
 845             iocb->u.isp24.exchange_address, iocb->ox_id);
 846
 847         port_id.b.domain = iocb->u.isp24.port_id[2];
 848         port_id.b.area   = iocb->u.isp24.port_id[1];
 849         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 850         port_id.b.rsvd_1 = 0;
 851
 852         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 853
 854         fcport->loop_id = loop_id;
 855         fcport->d_id = port_id;
 856         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 857
 858         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 859                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 860                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 861                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 862                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 863         }
 864
 865         list_del(&pla->list);
 866         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 867 }
 868
 869 void
 870 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 871     struct fc_port *sess, enum qlt_plogi_link_t link)
 872 {
 873         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 874         /* Inc ref_count first because link might already be pointing at pla */
 875         pla->ref_count++;
 876
 877         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 878                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 879                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 880                 sess, link, sess->port_name,
 881                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 882                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 883                 pla->ref_count, pla, link);
 884
 885         if (sess->plogi_link[link])
 886                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 887
 888         if (link == QLT_PLOGI_LINK_SAME_WWN)
 889                 pla->fcport = sess;
 890
 891         sess->plogi_link[link] = pla;
 892 }
 893
 894 typedef struct {
 895         /* These fields must be initialized by the caller */
 896         port_id_t id;
 897         /*
 898          * number of cmds dropped while we were waiting for
 899          * initiator to ack LOGO initialize to 1 if LOGO is
 900          * triggered by a command, otherwise, to 0
 901          */
 902         int cmd_count;
 903
 904         /* These fields are used by callee */
 905         struct list_head list;
 906 } qlt_port_logo_t;
 907
 908 static void
 909 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 910 {
 911         qlt_port_logo_t *tmp;
 912         int res;
 913
 914         mutex_lock(&vha->vha_tgt.tgt_mutex);
 915
 916         list_for_each_entry(tmp, &vha->logo_list, list) {
 917                 if (tmp->id.b24 == logo->id.b24) {
 918                         tmp->cmd_count += logo->cmd_count;
 919                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 920                         return;
 921                 }
 922         }
 923
 924         list_add_tail(&logo->list, &vha->logo_list);
 925
 926         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 927
 928         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 929
 930         mutex_lock(&vha->vha_tgt.tgt_mutex);
 931         list_del(&logo->list);
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 935             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 936             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 937             logo->cmd_count, res);
 938 }
 939
 940 static void qlt_free_session_done(struct work_struct *work)
 941 {
 942         struct fc_port *sess = container_of(work, struct fc_port,
 943             free_work);
 944         struct qla_tgt *tgt = sess->tgt;
 945         struct scsi_qla_host *vha = sess->vha;
 946         struct qla_hw_data *ha = vha->hw;
 947         unsigned long flags;
 948         bool logout_started = false;
 949         struct event_arg ea;
 950         scsi_qla_host_t *base_vha;
 951
 952         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 953                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 954                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 955                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 956                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 957                 sess->logout_on_delete, sess->keep_nport_handle,
 958                 sess->send_els_logo);
 959
 960
 961         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 962                 if (sess->send_els_logo) {
 963                         qlt_port_logo_t logo;
 964
 965                         logo.id = sess->d_id;
 966                         logo.cmd_count = 0;
 967                         qlt_send_first_logo(vha, &logo);
 968                 }
 969
 970                 if (sess->logout_on_delete) {
 971                         int rc;
 972
 973                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 974                         if (rc != QLA_SUCCESS)
 975                                 ql_log(ql_log_warn, vha, 0xf085,
 976                                     "Schedule logo failed sess %p rc %d\n",
 977                                     sess, rc);
 978                         else
 979                                 logout_started = true;
 980                 }
 981         }
 982
 983         /*
 984          * Release the target session for FC Nexus from fabric module code.
 985          */
 986         if (sess->se_sess != NULL)
 987                 ha->tgt.tgt_ops->free_session(sess);
 988
 989         if (logout_started) {
 990                 bool traced = false;
 991
 992                 while (!ACCESS_ONCE(sess->logout_completed)) {
 993                         if (!traced) {
 994                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 995                                         "%s: waiting for sess %p logout\n",
 996                                         __func__, sess);
 997                                 traced = true;
 998                         }
 999                         msleep(100);
1000                 }
1001
1002                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1003                     "%s: sess %p logout completed\n",__func__, sess);
1004         }
1005
1006         if (sess->logo_ack_needed) {
1007                 sess->logo_ack_needed = 0;
1008                 qla24xx_async_notify_ack(vha, sess,
1009                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1010         }
1011
1012         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1013         if (sess->se_sess) {
1014                 sess->se_sess = NULL;
1015                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1016                         tgt->sess_count--;
1017         }
1018
1019         sess->disc_state = DSC_DELETED;
1020         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1021         sess->deleted = QLA_SESS_DELETED;
1022         sess->login_retry = vha->hw->login_retry_count;
1023
1024         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1025                 vha->fcport_count--;
1026                 sess->login_succ = 0;
1027         }
1028
1029         if (sess->chip_reset != sess->vha->hw->chip_reset)
1030                 qla2x00_clear_loop_id(sess);
1031
1032         if (sess->conflict) {
1033                 sess->conflict->login_pause = 0;
1034                 sess->conflict = NULL;
1035                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1036                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1037         }
1038
1039         {
1040                 struct qlt_plogi_ack_t *own =
1041                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1042                 struct qlt_plogi_ack_t *con =
1043                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1044                 struct imm_ntfy_from_isp *iocb;
1045
1046                 if (con) {
1047                         iocb = &con->iocb;
1048                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1049                                  "se_sess %p / sess %p port %8phC is gone,"
1050                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1051                                  sess->se_sess, sess, sess->port_name,
1052                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1053                                  own ? own->ref_count : -1,
1054                                  iocb->u.isp24.port_name, con->ref_count);
1055                         qlt_plogi_ack_unref(vha, con);
1056                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1057                 } else {
1058                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1059                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1060                             sess->se_sess, sess, sess->port_name,
1061                             own ? "releasing own PLOGI" :
1062                             "no own PLOGI pending",
1063                             own ? own->ref_count : -1);
1064                 }
1065
1066                 if (own) {
1067                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1068                         qlt_plogi_ack_unref(vha, own);
1069                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1070                 }
1071         }
1072         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1073
1074         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1075             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1076                 sess, sess->port_name, vha->fcport_count);
1077
1078         if (tgt && (tgt->sess_count == 0))
1079                 wake_up_all(&tgt->waitQ);
1080
1081         if (vha->fcport_count == 0)
1082                 wake_up_all(&vha->fcport_waitQ);
1083
1084         base_vha = pci_get_drvdata(ha->pdev);
1085         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1086                 return;
1087
1088         if (!tgt || !tgt->tgt_stop) {
1089                 memset(&ea, 0, sizeof(ea));
1090                 ea.event = FCME_DELETE_DONE;
1091                 ea.fcport = sess;
1092                 qla2x00_fcport_event_handler(vha, &ea);
1093         }
1094 }
1095
1096 /* ha->tgt.sess_lock supposed to be held on entry */
1097 void qlt_unreg_sess(struct fc_port *sess)
1098 {
1099         struct scsi_qla_host *vha = sess->vha;
1100
1101         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1102             "%s sess %p for deletion %8phC\n",
1103             __func__, sess, sess->port_name);
1104
1105         if (sess->se_sess)
1106                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1107
1108         qla2x00_mark_device_lost(vha, sess, 1, 1);
1109
1110         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1111         sess->disc_state = DSC_DELETE_PEND;
1112         sess->last_rscn_gen = sess->rscn_gen;
1113         sess->last_login_gen = sess->login_gen;
1114
1115         INIT_WORK(&sess->free_work, qlt_free_session_done);
1116         schedule_work(&sess->free_work);
1117 }
1118 EXPORT_SYMBOL(qlt_unreg_sess);
1119
1120 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1121 {
1122         struct qla_hw_data *ha = vha->hw;
1123         struct fc_port *sess = NULL;
1124         uint16_t loop_id;
1125         int res = 0;
1126         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1127         unsigned long flags;
1128
1129         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1130         if (loop_id == 0xFFFF) {
1131                 /* Global event */
1132                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1133                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1134                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1135                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1136         } else {
1137                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1138                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1139                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1140         }
1141
1142         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1143             "Using sess for qla_tgt_reset: %p\n", sess);
1144         if (!sess) {
1145                 res = -ESRCH;
1146                 return res;
1147         }
1148
1149         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1150             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1151             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1152             mcmd, loop_id);
1153
1154         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1155 }
1156
1157 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1158 {
1159         if (sess->chip_reset != sess->vha->hw->chip_reset) {
1160                 sess->logout_on_delete = 0;
1161                 sess->logo_ack_needed = 0;
1162                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1163                 sess->scan_state = 0;
1164         }
1165 }
1166
1167 /* ha->tgt.sess_lock supposed to be held on entry */
1168 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1169         bool immediate)
1170 {
1171         struct qla_tgt *tgt = sess->tgt;
1172
1173         if (sess->disc_state == DSC_DELETE_PEND)
1174                 return;
1175
1176         if (sess->disc_state == DSC_DELETED) {
1177                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1178                         wake_up_all(&tgt->waitQ);
1179                 if (sess->vha->fcport_count == 0)
1180                         wake_up_all(&sess->vha->fcport_waitQ);
1181
1182                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1183                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1184                         return;
1185         }
1186
1187         sess->disc_state = DSC_DELETE_PEND;
1188
1189         if (sess->deleted == QLA_SESS_DELETED)
1190                 sess->logout_on_delete = 0;
1191
1192         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1193         qla24xx_chk_fcp_state(sess);
1194
1195         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1196             "Scheduling sess %p for deletion\n", sess);
1197
1198         schedule_work(&sess->del_work);
1199 }
1200
1201 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1202 {
1203         unsigned long flags;
1204         struct qla_hw_data *ha = sess->vha->hw;
1205         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1206         qlt_schedule_sess_for_deletion(sess, 1);
1207         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1208 }
1209
1210 /* ha->tgt.sess_lock supposed to be held on entry */
1211 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1212 {
1213         struct fc_port *sess;
1214         scsi_qla_host_t *vha = tgt->vha;
1215
1216         list_for_each_entry(sess, &vha->vp_fcports, list) {
1217                 if (sess->se_sess)
1218                         qlt_schedule_sess_for_deletion(sess, 1);
1219         }
1220
1221         /* At this point tgt could be already dead */
1222 }
1223
1224 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1225         uint16_t *loop_id)
1226 {
1227         struct qla_hw_data *ha = vha->hw;
1228         dma_addr_t gid_list_dma;
1229         struct gid_list_info *gid_list;
1230         char *id_iter;
1231         int res, rc, i;
1232         uint16_t entries;
1233
1234         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1235             &gid_list_dma, GFP_KERNEL);
1236         if (!gid_list) {
1237                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1238                     "qla_target(%d): DMA Alloc failed of %u\n",
1239                     vha->vp_idx, qla2x00_gid_list_size(ha));
1240                 return -ENOMEM;
1241         }
1242
1243         /* Get list of logged in devices */
1244         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1245         if (rc != QLA_SUCCESS) {
1246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1247                     "qla_target(%d): get_id_list() failed: %x\n",
1248                     vha->vp_idx, rc);
1249                 res = -EBUSY;
1250                 goto out_free_id_list;
1251         }
1252
1253         id_iter = (char *)gid_list;
1254         res = -ENOENT;
1255         for (i = 0; i < entries; i++) {
1256                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1257                 if ((gid->al_pa == s_id[2]) &&
1258                     (gid->area == s_id[1]) &&
1259                     (gid->domain == s_id[0])) {
1260                         *loop_id = le16_to_cpu(gid->loop_id);
1261                         res = 0;
1262                         break;
1263                 }
1264                 id_iter += ha->gid_list_info_size;
1265         }
1266
1267 out_free_id_list:
1268         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1269             gid_list, gid_list_dma);
1270         return res;
1271 }
1272
1273 /*
1274  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1275  * Caller must put it.
1276  */
1277 static struct fc_port *qlt_create_sess(
1278         struct scsi_qla_host *vha,
1279         fc_port_t *fcport,
1280         bool local)
1281 {
1282         struct qla_hw_data *ha = vha->hw;
1283         struct fc_port *sess = fcport;
1284         unsigned long flags;
1285
1286         if (vha->vha_tgt.qla_tgt->tgt_stop)
1287                 return NULL;
1288
1289         if (fcport->se_sess) {
1290                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1291                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1292                             "%s: kref_get_unless_zero failed for %8phC\n",
1293                             __func__, sess->port_name);
1294                         return NULL;
1295                 }
1296                 return fcport;
1297         }
1298         sess->tgt = vha->vha_tgt.qla_tgt;
1299         sess->local = local;
1300
1301         /*
1302          * Under normal circumstances we want to logout from firmware when
1303          * session eventually ends and release corresponding nport handle.
1304          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1305          * code will adjust these flags as necessary.
1306          */
1307         sess->logout_on_delete = 1;
1308         sess->keep_nport_handle = 0;
1309         sess->logout_completed = 0;
1310
1311         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1312             &fcport->port_name[0], sess) < 0) {
1313                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
1314                     "(%d) %8phC check_initiator_node_acl failed\n",
1315                     vha->vp_idx, fcport->port_name);
1316                 return NULL;
1317         } else {
1318                 kref_init(&fcport->sess_kref);
1319                 /*
1320                  * Take an extra reference to ->sess_kref here to handle
1321                  * fc_port access across ->tgt.sess_lock reaquire.
1322                  */
1323                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1324                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1325                             "%s: kref_get_unless_zero failed for %8phC\n",
1326                             __func__, sess->port_name);
1327                         return NULL;
1328                 }
1329
1330                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1331                 if (!IS_SW_RESV_ADDR(sess->d_id))
1332                         vha->vha_tgt.qla_tgt->sess_count++;
1333
1334                 qlt_do_generation_tick(vha, &sess->generation);
1335                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1336         }
1337
1338         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1339             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1340             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1341             vha->vha_tgt.qla_tgt->sess_count);
1342
1343         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1344             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1345             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1346             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1347             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1348             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1349
1350         return sess;
1351 }
1352
1353 /*
1354  * max_gen - specifies maximum session generation
1355  * at which this deletion requestion is still valid
1356  */
1357 void
1358 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1359 {
1360         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1361         struct fc_port *sess = fcport;
1362         unsigned long flags;
1363
1364         if (!vha->hw->tgt.tgt_ops)
1365                 return;
1366
1367         if (!tgt)
1368                 return;
1369
1370         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1371         if (tgt->tgt_stop) {
1372                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1373                 return;
1374         }
1375         if (!sess->se_sess) {
1376                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1377                 return;
1378         }
1379
1380         if (max_gen - sess->generation < 0) {
1381                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1383                     "Ignoring stale deletion request for se_sess %p / sess %p"
1384                     " for port %8phC, req_gen %d, sess_gen %d\n",
1385                     sess->se_sess, sess, sess->port_name, max_gen,
1386                     sess->generation);
1387                 return;
1388         }
1389
1390         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1391
1392         sess->local = 1;
1393         qlt_schedule_sess_for_deletion(sess, false);
1394         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1395 }
1396
1397 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1398 {
1399         struct qla_hw_data *ha = tgt->ha;
1400         unsigned long flags;
1401         int res;
1402         /*
1403          * We need to protect against race, when tgt is freed before or
1404          * inside wake_up()
1405          */
1406         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1407         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1408             "tgt %p, sess_count=%d\n",
1409             tgt, tgt->sess_count);
1410         res = (tgt->sess_count == 0);
1411         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1412
1413         return res;
1414 }
1415
1416 /* Called by tcm_qla2xxx configfs code */
1417 int qlt_stop_phase1(struct qla_tgt *tgt)
1418 {
1419         struct scsi_qla_host *vha = tgt->vha;
1420         struct qla_hw_data *ha = tgt->ha;
1421         unsigned long flags;
1422
1423         mutex_lock(&qla_tgt_mutex);
1424         if (!vha->fc_vport) {
1425                 struct Scsi_Host *sh = vha->host;
1426                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1427                 bool npiv_vports;
1428
1429                 spin_lock_irqsave(sh->host_lock, flags);
1430                 npiv_vports = (fc_host->npiv_vports_inuse);
1431                 spin_unlock_irqrestore(sh->host_lock, flags);
1432
1433                 if (npiv_vports) {
1434                         mutex_unlock(&qla_tgt_mutex);
1435                         return -EPERM;
1436                 }
1437         }
1438         if (tgt->tgt_stop || tgt->tgt_stopped) {
1439                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1440                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1441                 mutex_unlock(&qla_tgt_mutex);
1442                 return -EPERM;
1443         }
1444
1445         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1446             vha->host_no, vha);
1447         /*
1448          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1449          * Lock is needed, because we still can get an incoming packet.
1450          */
1451         mutex_lock(&vha->vha_tgt.tgt_mutex);
1452         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1453         tgt->tgt_stop = 1;
1454         qlt_clear_tgt_db(tgt);
1455         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1456         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1457         mutex_unlock(&qla_tgt_mutex);
1458
1459         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1460             "Waiting for sess works (tgt %p)", tgt);
1461         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1462         while (!list_empty(&tgt->sess_works_list)) {
1463                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1464                 flush_scheduled_work();
1465                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1466         }
1467         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1468
1469         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1470             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1471
1472         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1473
1474         /* Big hammer */
1475         if (!ha->flags.host_shutting_down &&
1476             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1477                 qlt_disable_vha(vha);
1478
1479         /* Wait for sessions to clear out (just in case) */
1480         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1481         return 0;
1482 }
1483 EXPORT_SYMBOL(qlt_stop_phase1);
1484
1485 /* Called by tcm_qla2xxx configfs code */
1486 void qlt_stop_phase2(struct qla_tgt *tgt)
1487 {
1488         struct qla_hw_data *ha = tgt->ha;
1489         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1490         unsigned long flags;
1491
1492         if (tgt->tgt_stopped) {
1493                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1494                     "Already in tgt->tgt_stopped state\n");
1495                 dump_stack();
1496                 return;
1497         }
1498
1499         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1500             "Waiting for %d IRQ commands to complete (tgt %p)",
1501             tgt->irq_cmd_count, tgt);
1502
1503         mutex_lock(&vha->vha_tgt.tgt_mutex);
1504         spin_lock_irqsave(&ha->hardware_lock, flags);
1505         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1506                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1507                 udelay(2);
1508                 spin_lock_irqsave(&ha->hardware_lock, flags);
1509         }
1510         tgt->tgt_stop = 0;
1511         tgt->tgt_stopped = 1;
1512         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1513         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1514
1515         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1516             tgt);
1517 }
1518 EXPORT_SYMBOL(qlt_stop_phase2);
1519
1520 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1521 static void qlt_release(struct qla_tgt *tgt)
1522 {
1523         scsi_qla_host_t *vha = tgt->vha;
1524
1525         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1526                 qlt_stop_phase2(tgt);
1527
1528         vha->vha_tgt.qla_tgt = NULL;
1529
1530         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1531             "Release of tgt %p finished\n", tgt);
1532
1533         kfree(tgt);
1534 }
1535
1536 /* ha->hardware_lock supposed to be held on entry */
1537 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1538         const void *param, unsigned int param_size)
1539 {
1540         struct qla_tgt_sess_work_param *prm;
1541         unsigned long flags;
1542
1543         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1544         if (!prm) {
1545                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1546                     "qla_target(%d): Unable to create session "
1547                     "work, command will be refused", 0);
1548                 return -ENOMEM;
1549         }
1550
1551         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1552             "Scheduling work (type %d, prm %p)"
1553             " to find session for param %p (size %d, tgt %p)\n",
1554             type, prm, param, param_size, tgt);
1555
1556         prm->type = type;
1557         memcpy(&prm->tm_iocb, param, param_size);
1558
1559         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1560         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1561         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1562
1563         schedule_work(&tgt->sess_work);
1564
1565         return 0;
1566 }
1567
1568 /*
1569  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1570  */
1571 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1572         struct imm_ntfy_from_isp *ntfy,
1573         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1574         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1575 {
1576         struct qla_hw_data *ha = vha->hw;
1577         request_t *pkt;
1578         struct nack_to_isp *nack;
1579
1580         if (!ha->flags.fw_started)
1581                 return;
1582
1583         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1584
1585         /* Send marker if required */
1586         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1587                 return;
1588
1589         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1590         if (!pkt) {
1591                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1592                     "qla_target(%d): %s failed: unable to allocate "
1593                     "request packet\n", vha->vp_idx, __func__);
1594                 return;
1595         }
1596
1597         if (vha->vha_tgt.qla_tgt != NULL)
1598                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1599
1600         pkt->entry_type = NOTIFY_ACK_TYPE;
1601         pkt->entry_count = 1;
1602
1603         nack = (struct nack_to_isp *)pkt;
1604         nack->ox_id = ntfy->ox_id;
1605
1606         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1607         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1608         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1609                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1610                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1611         }
1612         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1613         nack->u.isp24.status = ntfy->u.isp24.status;
1614         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1615         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1616         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1617         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1618         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1619         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1620         nack->u.isp24.srr_reject_code = srr_reject_code;
1621         nack->u.isp24.srr_reject_code_expl = srr_explan;
1622         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1623
1624         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1625             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1626             vha->vp_idx, nack->u.isp24.status);
1627
1628         /* Memory Barrier */
1629         wmb();
1630         qla2x00_start_iocbs(vha, vha->req);
1631 }
1632
1633 /*
1634  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1635  */
1636 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1637         struct abts_recv_from_24xx *abts, uint32_t status,
1638         bool ids_reversed)
1639 {
1640         struct qla_hw_data *ha = vha->hw;
1641         struct abts_resp_to_24xx *resp;
1642         uint32_t f_ctl;
1643         uint8_t *p;
1644
1645         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1646             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1647             ha, abts, status);
1648
1649         /* Send marker if required */
1650         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1651                 return;
1652
1653         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1654         if (!resp) {
1655                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1656                     "qla_target(%d): %s failed: unable to allocate "
1657                     "request packet", vha->vp_idx, __func__);
1658                 return;
1659         }
1660
1661         resp->entry_type = ABTS_RESP_24XX;
1662         resp->entry_count = 1;
1663         resp->nport_handle = abts->nport_handle;
1664         resp->vp_index = vha->vp_idx;
1665         resp->sof_type = abts->sof_type;
1666         resp->exchange_address = abts->exchange_address;
1667         resp->fcp_hdr_le = abts->fcp_hdr_le;
1668         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1669             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1670             F_CTL_SEQ_INITIATIVE);
1671         p = (uint8_t *)&f_ctl;
1672         resp->fcp_hdr_le.f_ctl[0] = *p++;
1673         resp->fcp_hdr_le.f_ctl[1] = *p++;
1674         resp->fcp_hdr_le.f_ctl[2] = *p;
1675         if (ids_reversed) {
1676                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1677                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1678                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1679                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1680                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1681                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1682         } else {
1683                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1684                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1685                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1686                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1687                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1688                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1689         }
1690         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1691         if (status == FCP_TMF_CMPL) {
1692                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1693                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1694                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1695                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1696                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1697                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1698         } else {
1699                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1700                 resp->payload.ba_rjt.reason_code =
1701                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1702                 /* Other bytes are zero */
1703         }
1704
1705         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1706
1707         /* Memory Barrier */
1708         wmb();
1709         qla2x00_start_iocbs(vha, vha->req);
1710 }
1711
1712 /*
1713  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1714  */
1715 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1716         struct abts_resp_from_24xx_fw *entry)
1717 {
1718         struct ctio7_to_24xx *ctio;
1719
1720         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1721             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1722         /* Send marker if required */
1723         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1724                 return;
1725
1726         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1727         if (ctio == NULL) {
1728                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1729                     "qla_target(%d): %s failed: unable to allocate "
1730                     "request packet\n", vha->vp_idx, __func__);
1731                 return;
1732         }
1733
1734         /*
1735          * We've got on entrance firmware's response on by us generated
1736          * ABTS response. So, in it ID fields are reversed.
1737          */
1738
1739         ctio->entry_type = CTIO_TYPE7;
1740         ctio->entry_count = 1;
1741         ctio->nport_handle = entry->nport_handle;
1742         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1743         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1744         ctio->vp_index = vha->vp_idx;
1745         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1746         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1747         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1748         ctio->exchange_addr = entry->exchange_addr_to_abort;
1749         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1750                                             CTIO7_FLAGS_TERMINATE);
1751         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1752
1753         /* Memory Barrier */
1754         wmb();
1755         qla2x00_start_iocbs(vha, vha->req);
1756
1757         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1758             FCP_TMF_CMPL, true);
1759 }
1760
1761 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1762 {
1763         struct qla_tgt_sess_op *op;
1764         struct qla_tgt_cmd *cmd;
1765
1766         spin_lock(&vha->cmd_list_lock);
1767
1768         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1769                 if (tag == op->atio.u.isp24.exchange_addr) {
1770                         op->aborted = true;
1771                         spin_unlock(&vha->cmd_list_lock);
1772                         return 1;
1773                 }
1774         }
1775
1776         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1777                 if (tag == op->atio.u.isp24.exchange_addr) {
1778                         op->aborted = true;
1779                         spin_unlock(&vha->cmd_list_lock);
1780                         return 1;
1781                 }
1782         }
1783
1784         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1785                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1786                         cmd->aborted = 1;
1787                         spin_unlock(&vha->cmd_list_lock);
1788                         return 1;
1789                 }
1790         }
1791
1792         spin_unlock(&vha->cmd_list_lock);
1793         return 0;
1794 }
1795
1796 /* drop cmds for the given lun
1797  * XXX only looks for cmds on the port through which lun reset was recieved
1798  * XXX does not go through the list of other port (which may have cmds
1799  *     for the same lun)
1800  */
1801 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1802                                 uint32_t lun, uint8_t *s_id)
1803 {
1804         struct qla_tgt_sess_op *op;
1805         struct qla_tgt_cmd *cmd;
1806         uint32_t key;
1807
1808         key = sid_to_key(s_id);
1809         spin_lock(&vha->cmd_list_lock);
1810         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1811                 uint32_t op_key;
1812                 uint32_t op_lun;
1813
1814                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1815                 op_lun = scsilun_to_int(
1816                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1817                 if (op_key == key && op_lun == lun)
1818                         op->aborted = true;
1819         }
1820
1821         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1822                 uint32_t op_key;
1823                 u64 op_lun;
1824
1825                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1826                 op_lun = scsilun_to_int(
1827                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1828                 if (op_key == key && op_lun == lun)
1829                         op->aborted = true;
1830         }
1831
1832         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1833                 uint32_t cmd_key;
1834                 uint32_t cmd_lun;
1835
1836                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1837                 cmd_lun = scsilun_to_int(
1838                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1839                 if (cmd_key == key && cmd_lun == lun)
1840                         cmd->aborted = 1;
1841         }
1842         spin_unlock(&vha->cmd_list_lock);
1843 }
1844
1845 /* ha->hardware_lock supposed to be held on entry */
1846 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1847         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1848 {
1849         struct qla_hw_data *ha = vha->hw;
1850         struct se_session *se_sess = sess->se_sess;
1851         struct qla_tgt_mgmt_cmd *mcmd;
1852         struct se_cmd *se_cmd;
1853         u32 lun = 0;
1854         int rc;
1855         bool found_lun = false;
1856         unsigned long flags;
1857
1858         spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
1859         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1860                 struct qla_tgt_cmd *cmd =
1861                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1862                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1863                         lun = cmd->unpacked_lun;
1864                         found_lun = true;
1865                         break;
1866                 }
1867         }
1868         spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
1869
1870         /* cmd not in LIO lists, look in qla list */
1871         if (!found_lun) {
1872                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1873                         /* send TASK_ABORT response immediately */
1874                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1875                         return 0;
1876                 } else {
1877                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1878                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1879                             abts->exchange_addr_to_abort);
1880                         return -ENOENT;
1881                 }
1882         }
1883
1884         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1885             "qla_target(%d): task abort (tag=%d)\n",
1886             vha->vp_idx, abts->exchange_addr_to_abort);
1887
1888         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1889         if (mcmd == NULL) {
1890                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1891                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1892                     vha->vp_idx, __func__);
1893                 return -ENOMEM;
1894         }
1895         memset(mcmd, 0, sizeof(*mcmd));
1896
1897         mcmd->sess = sess;
1898         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1899         mcmd->reset_count = vha->hw->chip_reset;
1900         mcmd->tmr_func = QLA_TGT_ABTS;
1901
1902         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func,
1903             abts->exchange_addr_to_abort);
1904         if (rc != 0) {
1905                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1906                     "qla_target(%d):  tgt_ops->handle_tmr()"
1907                     " failed: %d", vha->vp_idx, rc);
1908                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1909                 return -EFAULT;
1910         }
1911
1912         return 0;
1913 }
1914
1915 /*
1916  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1917  */
1918 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1919         struct abts_recv_from_24xx *abts)
1920 {
1921         struct qla_hw_data *ha = vha->hw;
1922         struct fc_port *sess;
1923         uint32_t tag = abts->exchange_addr_to_abort;
1924         uint8_t s_id[3];
1925         int rc;
1926         unsigned long flags;
1927
1928         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1929                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1930                     "qla_target(%d): ABTS: Abort Sequence not "
1931                     "supported\n", vha->vp_idx);
1932                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1933                 return;
1934         }
1935
1936         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1937                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1938                     "qla_target(%d): ABTS: Unknown Exchange "
1939                     "Address received\n", vha->vp_idx);
1940                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1941                 return;
1942         }
1943
1944         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1945             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1946             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1947             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1948             le32_to_cpu(abts->fcp_hdr_le.parameter));
1949
1950         s_id[0] = abts->fcp_hdr_le.s_id[2];
1951         s_id[1] = abts->fcp_hdr_le.s_id[1];
1952         s_id[2] = abts->fcp_hdr_le.s_id[0];
1953
1954         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1955         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1956         if (!sess) {
1957                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1958                     "qla_target(%d): task abort for non-existant session\n",
1959                     vha->vp_idx);
1960                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1961                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1962
1963                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1964
1965                 if (rc != 0) {
1966                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1967                             false);
1968                 }
1969                 return;
1970         }
1971         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1972
1973
1974         if (sess->deleted) {
1975                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1976                 return;
1977         }
1978
1979         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1980         if (rc != 0) {
1981                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1982                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1983                     vha->vp_idx, rc);
1984                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1985                 return;
1986         }
1987 }
1988
1989 /*
1990  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1991  */
1992 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1993         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1994 {
1995         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1996         struct ctio7_to_24xx *ctio;
1997         uint16_t temp;
1998
1999         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2000             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2001             ha, atio, resp_code);
2002
2003         /* Send marker if required */
2004         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
2005                 return;
2006
2007         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
2008         if (ctio == NULL) {
2009                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2010                     "qla_target(%d): %s failed: unable to allocate "
2011                     "request packet\n", ha->vp_idx, __func__);
2012                 return;
2013         }
2014
2015         ctio->entry_type = CTIO_TYPE7;
2016         ctio->entry_count = 1;
2017         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2018         ctio->nport_handle = mcmd->sess->loop_id;
2019         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2020         ctio->vp_index = ha->vp_idx;
2021         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2022         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2023         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2024         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2025         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
2026             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
2027         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2028         ctio->u.status1.ox_id = cpu_to_le16(temp);
2029         ctio->u.status1.scsi_status =
2030             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2031         ctio->u.status1.response_len = cpu_to_le16(8);
2032         ctio->u.status1.sense_data[0] = resp_code;
2033
2034         /* Memory Barrier */
2035         wmb();
2036         qla2x00_start_iocbs(ha, ha->req);
2037 }
2038
2039 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2040 {
2041         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2042 }
2043 EXPORT_SYMBOL(qlt_free_mcmd);
2044
2045 /*
2046  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2047  * reacquire
2048  */
2049 void qlt_send_resp_ctio(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
2050     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2051 {
2052         struct atio_from_isp *atio = &cmd->atio;
2053         struct ctio7_to_24xx *ctio;
2054         uint16_t temp;
2055
2056         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2057             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2058             "sense_key=%02x, asc=%02x, ascq=%02x",
2059             vha, atio, scsi_status, sense_key, asc, ascq);
2060
2061         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2062         if (!ctio) {
2063                 ql_dbg(ql_dbg_async, vha, 0x3067,
2064                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2065                     vha->host_no, __func__);
2066                 goto out;
2067         }
2068
2069         ctio->entry_type = CTIO_TYPE7;
2070         ctio->entry_count = 1;
2071         ctio->handle = QLA_TGT_SKIP_HANDLE;
2072         ctio->nport_handle = cmd->sess->loop_id;
2073         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2074         ctio->vp_index = vha->vp_idx;
2075         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2076         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2077         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2078         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2079         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
2080             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
2081         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2082         ctio->u.status1.ox_id = cpu_to_le16(temp);
2083         ctio->u.status1.scsi_status =
2084             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2085         ctio->u.status1.response_len = cpu_to_le16(18);
2086         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2087
2088         if (ctio->u.status1.residual != 0)
2089                 ctio->u.status1.scsi_status |=
2090                     cpu_to_le16(SS_RESIDUAL_UNDER);
2091
2092         /* Response code and sense key */
2093         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2094             (&ctio->u.status1.sense_data)[0]);
2095         /* Additional sense length */
2096         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2097         /* ASC and ASCQ */
2098         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2099             (&ctio->u.status1.sense_data)[3]);
2100
2101         /* Memory Barrier */
2102         wmb();
2103
2104         qla2x00_start_iocbs(vha, vha->req);
2105 out:
2106         return;
2107 }
2108
2109 /* callback from target fabric module code */
2110 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2111 {
2112         struct scsi_qla_host *vha = mcmd->sess->vha;
2113         struct qla_hw_data *ha = vha->hw;
2114         unsigned long flags;
2115
2116         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2117             "TM response mcmd (%p) status %#x state %#x",
2118             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2119
2120         spin_lock_irqsave(&ha->hardware_lock, flags);
2121
2122         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
2123                 /*
2124                  * Either the port is not online or this request was from
2125                  * previous life, just abort the processing.
2126                  */
2127                 ql_dbg(ql_dbg_async, vha, 0xe100,
2128                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2129                         vha->flags.online, qla2x00_reset_active(vha),
2130                         mcmd->reset_count, ha->chip_reset);
2131                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2132                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2133                 return;
2134         }
2135
2136         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2137                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2138                     ELS_LOGO ||
2139                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2140                     ELS_PRLO ||
2141                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2142                     ELS_TPRLO) {
2143                         ql_dbg(ql_dbg_disc, vha, 0xffff,
2144                             "TM response logo %phC status %#x state %#x",
2145                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2146                             mcmd->flags);
2147                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2148                 } else {
2149                         qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
2150                                 0, 0, 0, 0, 0, 0);
2151                 }
2152         } else {
2153                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2154                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
2155                             mcmd->fc_tm_rsp, false);
2156                 else
2157                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
2158                             mcmd->fc_tm_rsp);
2159         }
2160         /*
2161          * Make the callback for ->free_mcmd() to queue_work() and invoke
2162          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2163          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2164          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2165          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2166          * qlt_xmit_tm_rsp() returns here..
2167          */
2168         ha->tgt.tgt_ops->free_mcmd(mcmd);
2169         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2170 }
2171 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2172
2173 /* No locks */
2174 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2175 {
2176         struct qla_tgt_cmd *cmd = prm->cmd;
2177
2178         BUG_ON(cmd->sg_cnt == 0);
2179
2180         prm->sg = (struct scatterlist *)cmd->sg;
2181         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
2182             cmd->sg_cnt, cmd->dma_data_direction);
2183         if (unlikely(prm->seg_cnt == 0))
2184                 goto out_err;
2185
2186         prm->cmd->sg_mapped = 1;
2187
2188         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2189                 /*
2190                  * If greater than four sg entries then we need to allocate
2191                  * the continuation entries
2192                  */
2193                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
2194                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2195                         prm->tgt->datasegs_per_cmd,
2196                         prm->tgt->datasegs_per_cont);
2197         } else {
2198                 /* DIF */
2199                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2200                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2201                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2202                         prm->tot_dsds = prm->seg_cnt;
2203                 } else
2204                         prm->tot_dsds = prm->seg_cnt;
2205
2206                 if (cmd->prot_sg_cnt) {
2207                         prm->prot_sg      = cmd->prot_sg;
2208                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
2209                                 cmd->prot_sg, cmd->prot_sg_cnt,
2210                                 cmd->dma_data_direction);
2211                         if (unlikely(prm->prot_seg_cnt == 0))
2212                                 goto out_err;
2213
2214                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2215                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2216                                 /* Dif Bundling not support here */
2217                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2218                                                                 cmd->blk_sz);
2219                                 prm->tot_dsds += prm->prot_seg_cnt;
2220                         } else
2221                                 prm->tot_dsds += prm->prot_seg_cnt;
2222                 }
2223         }
2224
2225         return 0;
2226
2227 out_err:
2228         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
2229             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2230             0, prm->cmd->sg_cnt);
2231         return -1;
2232 }
2233
2234 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2235 {
2236         struct qla_hw_data *ha = vha->hw;
2237
2238         if (!cmd->sg_mapped)
2239                 return;
2240
2241         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2242         cmd->sg_mapped = 0;
2243
2244         if (cmd->prot_sg_cnt)
2245                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2246                         cmd->dma_data_direction);
2247
2248         if (cmd->ctx_dsd_alloced)
2249                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
2250
2251         if (cmd->ctx)
2252                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2253 }
2254
2255 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
2256         uint32_t req_cnt)
2257 {
2258         uint32_t cnt, cnt_in;
2259
2260         if (vha->req->cnt < (req_cnt + 2)) {
2261                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
2262                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
2263
2264                 if  (vha->req->ring_index < cnt)
2265                         vha->req->cnt = cnt - vha->req->ring_index;
2266                 else
2267                         vha->req->cnt = vha->req->length -
2268                             (vha->req->ring_index - cnt);
2269
2270                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
2271                         ql_dbg(ql_dbg_io, vha, 0x305a,
2272                             "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
2273                             vha->vp_idx, vha->req->ring_index,
2274                             vha->req->cnt, req_cnt, cnt, cnt_in,
2275                             vha->req->length);
2276                         return -EAGAIN;
2277                 }
2278         }
2279
2280         vha->req->cnt -= req_cnt;
2281
2282         return 0;
2283 }
2284
2285 /*
2286  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2287  */
2288 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
2289 {
2290         /* Adjust ring index. */
2291         vha->req->ring_index++;
2292         if (vha->req->ring_index == vha->req->length) {
2293                 vha->req->ring_index = 0;
2294                 vha->req->ring_ptr = vha->req->ring;
2295         } else {
2296                 vha->req->ring_ptr++;
2297         }
2298         return (cont_entry_t *)vha->req->ring_ptr;
2299 }
2300
2301 /* ha->hardware_lock supposed to be held on entry */
2302 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
2303 {
2304         struct qla_hw_data *ha = vha->hw;
2305         uint32_t h;
2306
2307         h = ha->tgt.current_handle;
2308         /* always increment cmd handle */
2309         do {
2310                 ++h;
2311                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
2312                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
2313                 if (h == ha->tgt.current_handle) {
2314                         ql_dbg(ql_dbg_io, vha, 0x305b,
2315                             "qla_target(%d): Ran out of "
2316                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
2317                         h = QLA_TGT_NULL_HANDLE;
2318                         break;
2319                 }
2320         } while ((h == QLA_TGT_NULL_HANDLE) ||
2321             (h == QLA_TGT_SKIP_HANDLE) ||
2322             (ha->tgt.cmds[h-1] != NULL));
2323
2324         if (h != QLA_TGT_NULL_HANDLE)
2325                 ha->tgt.current_handle = h;
2326
2327         return h;
2328 }
2329
2330 /* ha->hardware_lock supposed to be held on entry */
2331 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
2332         struct scsi_qla_host *vha)
2333 {
2334         uint32_t h;
2335         struct ctio7_to_24xx *pkt;
2336         struct qla_hw_data *ha = vha->hw;
2337         struct atio_from_isp *atio = &prm->cmd->atio;
2338         uint16_t temp;
2339
2340         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
2341         prm->pkt = pkt;
2342         memset(pkt, 0, sizeof(*pkt));
2343
2344         pkt->entry_type = CTIO_TYPE7;
2345         pkt->entry_count = (uint8_t)prm->req_cnt;
2346         pkt->vp_index = vha->vp_idx;
2347
2348         h = qlt_make_handle(vha);
2349         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2350                 /*
2351                  * CTIO type 7 from the firmware doesn't provide a way to
2352                  * know the initiator's LOOP ID, hence we can't find
2353                  * the session and, so, the command.
2354                  */
2355                 return -EAGAIN;
2356         } else
2357                 ha->tgt.cmds[h - 1] = prm->cmd;
2358
2359         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2360         pkt->nport_handle = prm->cmd->loop_id;
2361         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2362         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2363         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2364         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2365         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2366         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
2367         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2368         pkt->u.status0.ox_id = cpu_to_le16(temp);
2369         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2370
2371         return 0;
2372 }
2373
2374 /*
2375  * ha->hardware_lock supposed to be held on entry. We have already made sure
2376  * that there is sufficient amount of request entries to not drop it.
2377  */
2378 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
2379         struct scsi_qla_host *vha)
2380 {
2381         int cnt;
2382         uint32_t *dword_ptr;
2383         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2384
2385         /* Build continuation packets */
2386         while (prm->seg_cnt > 0) {
2387                 cont_a64_entry_t *cont_pkt64 =
2388                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2389
2390                 /*
2391                  * Make sure that from cont_pkt64 none of
2392                  * 64-bit specific fields used for 32-bit
2393                  * addressing. Cast to (cont_entry_t *) for
2394                  * that.
2395                  */
2396
2397                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2398
2399                 cont_pkt64->entry_count = 1;
2400                 cont_pkt64->sys_define = 0;
2401
2402                 if (enable_64bit_addressing) {
2403                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2404                         dword_ptr =
2405                             (uint32_t *)&cont_pkt64->dseg_0_address;
2406                 } else {
2407                         cont_pkt64->entry_type = CONTINUE_TYPE;
2408                         dword_ptr =
2409                             (uint32_t *)&((cont_entry_t *)
2410                                 cont_pkt64)->dseg_0_address;
2411                 }
2412
2413                 /* Load continuation entry data segments */
2414                 for (cnt = 0;
2415                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2416                     cnt++, prm->seg_cnt--) {
2417                         *dword_ptr++ =
2418                             cpu_to_le32(pci_dma_lo32
2419                                 (sg_dma_address(prm->sg)));
2420                         if (enable_64bit_addressing) {
2421                                 *dword_ptr++ =
2422                                     cpu_to_le32(pci_dma_hi32
2423                                         (sg_dma_address
2424                                         (prm->sg)));
2425                         }
2426                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2427
2428                         prm->sg = sg_next(prm->sg);
2429                 }
2430         }
2431 }
2432
2433 /*
2434  * ha->hardware_lock supposed to be held on entry. We have already made sure
2435  * that there is sufficient amount of request entries to not drop it.
2436  */
2437 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2438         struct scsi_qla_host *vha)
2439 {
2440         int cnt;
2441         uint32_t *dword_ptr;
2442         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2443         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2444
2445         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2446
2447         /* Setup packet address segment pointer */
2448         dword_ptr = pkt24->u.status0.dseg_0_address;
2449
2450         /* Set total data segment count */
2451         if (prm->seg_cnt)
2452                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2453
2454         if (prm->seg_cnt == 0) {
2455                 /* No data transfer */
2456                 *dword_ptr++ = 0;
2457                 *dword_ptr = 0;
2458                 return;
2459         }
2460
2461         /* If scatter gather */
2462
2463         /* Load command entry data segments */
2464         for (cnt = 0;
2465             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2466             cnt++, prm->seg_cnt--) {
2467                 *dword_ptr++ =
2468                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2469                 if (enable_64bit_addressing) {
2470                         *dword_ptr++ =
2471                             cpu_to_le32(pci_dma_hi32(
2472                                 sg_dma_address(prm->sg)));
2473                 }
2474                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2475
2476                 prm->sg = sg_next(prm->sg);
2477         }
2478
2479         qlt_load_cont_data_segments(prm, vha);
2480 }
2481
2482 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2483 {
2484         return cmd->bufflen > 0;
2485 }
2486
2487 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2488 {
2489         struct qla_tgt_cmd *cmd;
2490         struct scsi_qla_host *vha;
2491
2492         /* asc 0x10=dif error */
2493         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2494                 cmd = prm->cmd;
2495                 vha = cmd->vha;
2496                 /* ASCQ */
2497                 switch (prm->sense_buffer[13]) {
2498                 case 1:
2499                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2500                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2501                             "se_cmd=%p tag[%x]",
2502                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2503                             cmd->atio.u.isp24.exchange_addr);
2504                         break;
2505                 case 2:
2506                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2507                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2508                             "se_cmd=%p tag[%x]",
2509                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2510                             cmd->atio.u.isp24.exchange_addr);
2511                         break;
2512                 case 3:
2513                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2514                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2515                             "se_cmd=%p tag[%x]",
2516                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2517                             cmd->atio.u.isp24.exchange_addr);
2518                         break;
2519                 default:
2520                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2521                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2522                             "se_cmd=%p tag[%x]",
2523                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2524                             cmd->atio.u.isp24.exchange_addr);
2525                         break;
2526                 }
2527                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xffff, cmd->cdb, 16);
2528         }
2529 }
2530
2531 /*
2532  * Called without ha->hardware_lock held
2533  */
2534 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2535         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2536         uint32_t *full_req_cnt)
2537 {
2538         struct qla_tgt *tgt = cmd->tgt;
2539         struct scsi_qla_host *vha = tgt->vha;
2540         struct qla_hw_data *ha = vha->hw;
2541         struct se_cmd *se_cmd = &cmd->se_cmd;
2542
2543         prm->cmd = cmd;
2544         prm->tgt = tgt;
2545         prm->rq_result = scsi_status;
2546         prm->sense_buffer = &cmd->sense_buffer[0];
2547         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2548         prm->sg = NULL;
2549         prm->seg_cnt = -1;
2550         prm->req_cnt = 1;
2551         prm->add_status_pkt = 0;
2552
2553         /* Send marker if required */
2554         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2555                 return -EFAULT;
2556
2557         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2558                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2559                         return -EAGAIN;
2560         }
2561
2562         *full_req_cnt = prm->req_cnt;
2563
2564         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2565                 prm->residual = se_cmd->residual_count;
2566                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2567                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2568                        prm->residual, se_cmd->tag,
2569                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2570                        cmd->bufflen, prm->rq_result);
2571                 prm->rq_result |= SS_RESIDUAL_UNDER;
2572         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2573                 prm->residual = se_cmd->residual_count;
2574                 ql_dbg(ql_dbg_io, vha, 0x305d,
2575                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2576                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2577                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2578                 prm->rq_result |= SS_RESIDUAL_OVER;
2579         }
2580
2581         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2582                 /*
2583                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2584                  * ignored in *xmit_response() below
2585                  */
2586                 if (qlt_has_data(cmd)) {
2587                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2588                             (IS_FWI2_CAPABLE(ha) &&
2589                             (prm->rq_result != 0))) {
2590                                 prm->add_status_pkt = 1;
2591                                 (*full_req_cnt)++;
2592                         }
2593                 }
2594         }
2595
2596         return 0;
2597 }
2598
2599 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2600         struct qla_tgt_cmd *cmd, int sending_sense)
2601 {
2602         if (ha->tgt.enable_class_2)
2603                 return 0;
2604
2605         if (sending_sense)
2606                 return cmd->conf_compl_supported;
2607         else
2608                 return ha->tgt.enable_explicit_conf &&
2609                     cmd->conf_compl_supported;
2610 }
2611
2612 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2613         struct qla_tgt_prm *prm)
2614 {
2615         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2616             (uint32_t)sizeof(ctio->u.status1.sense_data));
2617         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2618         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2619                 ctio->u.status0.flags |= cpu_to_le16(
2620                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2621                     CTIO7_FLAGS_CONFORM_REQ);
2622         }
2623         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2624         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2625         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2626                 int i;
2627
2628                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2629                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2630                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2631                                     "Skipping EXPLICIT_CONFORM and "
2632                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2633                                     "non GOOD status\n");
2634                                 goto skip_explict_conf;
2635                         }
2636                         ctio->u.status1.flags |= cpu_to_le16(
2637                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2638                             CTIO7_FLAGS_CONFORM_REQ);
2639                 }
2640 skip_explict_conf:
2641                 ctio->u.status1.flags &=
2642                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2643                 ctio->u.status1.flags |=
2644                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2645                 ctio->u.status1.scsi_status |=
2646                     cpu_to_le16(SS_SENSE_LEN_VALID);
2647                 ctio->u.status1.sense_length =
2648                     cpu_to_le16(prm->sense_buffer_len);
2649                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2650                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2651                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2652
2653                 qlt_print_dif_err(prm);
2654
2655         } else {
2656                 ctio->u.status1.flags &=
2657                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2658                 ctio->u.status1.flags |=
2659                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2660                 ctio->u.status1.sense_length = 0;
2661                 memset(ctio->u.status1.sense_data, 0,
2662                     sizeof(ctio->u.status1.sense_data));
2663         }
2664
2665         /* Sense with len > 24, is it possible ??? */
2666 }
2667
2668 static inline int
2669 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2670 {
2671         switch (se_cmd->prot_op) {
2672         case TARGET_PROT_DOUT_INSERT:
2673         case TARGET_PROT_DIN_STRIP:
2674                 if (ql2xenablehba_err_chk >= 1)
2675                         return 1;
2676                 break;
2677         case TARGET_PROT_DOUT_PASS:
2678         case TARGET_PROT_DIN_PASS:
2679                 if (ql2xenablehba_err_chk >= 2)
2680                         return 1;
2681                 break;
2682         case TARGET_PROT_DIN_INSERT:
2683         case TARGET_PROT_DOUT_STRIP:
2684                 return 1;
2685         default:
2686                 break;
2687         }
2688         return 0;
2689 }
2690
2691 static inline int
2692 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2693 {
2694         switch (se_cmd->prot_op) {
2695         case TARGET_PROT_DIN_INSERT:
2696         case TARGET_PROT_DOUT_INSERT:
2697         case TARGET_PROT_DIN_STRIP:
2698         case TARGET_PROT_DOUT_STRIP:
2699         case TARGET_PROT_DIN_PASS:
2700         case TARGET_PROT_DOUT_PASS:
2701             return 1;
2702         default:
2703             return 0;
2704         }
2705         return 0;
2706 }
2707
2708 /*
2709  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2710  */
2711 static void
2712 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2713     uint16_t *pfw_prot_opts)
2714 {
2715         struct se_cmd *se_cmd = &cmd->se_cmd;
2716         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2717         scsi_qla_host_t *vha = cmd->tgt->vha;
2718         struct qla_hw_data *ha = vha->hw;
2719         uint32_t t32 = 0;
2720
2721         /*
2722          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2723          * have been immplemented by TCM, before AppTag is avail.
2724          * Look for modesense_handlers[]
2725          */
2726         ctx->app_tag = 0;
2727         ctx->app_tag_mask[0] = 0x0;
2728         ctx->app_tag_mask[1] = 0x0;
2729
2730         if (IS_PI_UNINIT_CAPABLE(ha)) {
2731                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2732                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2733                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2734                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2735                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2736         }
2737
2738         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2739
2740         switch (se_cmd->prot_type) {
2741         case TARGET_DIF_TYPE0_PROT:
2742                 /*
2743                  * No check for ql2xenablehba_err_chk, as it
2744                  * would be an I/O error if hba tag generation
2745                  * is not done.
2746                  */
2747                 ctx->ref_tag = cpu_to_le32(lba);
2748                 /* enable ALL bytes of the ref tag */
2749                 ctx->ref_tag_mask[0] = 0xff;
2750                 ctx->ref_tag_mask[1] = 0xff;
2751                 ctx->ref_tag_mask[2] = 0xff;
2752                 ctx->ref_tag_mask[3] = 0xff;
2753                 break;
2754         case TARGET_DIF_TYPE1_PROT:
2755             /*
2756              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2757              * REF tag, and 16 bit app tag.
2758              */
2759             ctx->ref_tag = cpu_to_le32(lba);
2760             if (!qla_tgt_ref_mask_check(se_cmd) ||
2761                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2762                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2763                     break;
2764             }
2765             /* enable ALL bytes of the ref tag */
2766             ctx->ref_tag_mask[0] = 0xff;
2767             ctx->ref_tag_mask[1] = 0xff;
2768             ctx->ref_tag_mask[2] = 0xff;
2769             ctx->ref_tag_mask[3] = 0xff;
2770             break;
2771         case TARGET_DIF_TYPE2_PROT:
2772             /*
2773              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2774              * tag has to match LBA in CDB + N
2775              */
2776             ctx->ref_tag = cpu_to_le32(lba);
2777             if (!qla_tgt_ref_mask_check(se_cmd) ||
2778                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2779                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2780                     break;
2781             }
2782             /* enable ALL bytes of the ref tag */
2783             ctx->ref_tag_mask[0] = 0xff;
2784             ctx->ref_tag_mask[1] = 0xff;
2785             ctx->ref_tag_mask[2] = 0xff;
2786             ctx->ref_tag_mask[3] = 0xff;
2787             break;
2788         case TARGET_DIF_TYPE3_PROT:
2789             /* For TYPE 3 protection: 16 bit GUARD only */
2790             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2791             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2792                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2793             break;
2794         }
2795 }
2796
2797 static inline int
2798 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2799 {
2800         uint32_t                *cur_dsd;
2801         uint32_t                transfer_length = 0;
2802         uint32_t                data_bytes;
2803         uint32_t                dif_bytes;
2804         uint8_t                 bundling = 1;
2805         uint8_t                 *clr_ptr;
2806         struct crc_context      *crc_ctx_pkt = NULL;
2807         struct qla_hw_data      *ha;
2808         struct ctio_crc2_to_fw  *pkt;
2809         dma_addr_t              crc_ctx_dma;
2810         uint16_t                fw_prot_opts = 0;
2811         struct qla_tgt_cmd      *cmd = prm->cmd;
2812         struct se_cmd           *se_cmd = &cmd->se_cmd;
2813         uint32_t h;
2814         struct atio_from_isp *atio = &prm->cmd->atio;
2815         struct qla_tc_param     tc;
2816         uint16_t t16;
2817
2818         ha = vha->hw;
2819
2820         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2821         prm->pkt = pkt;
2822         memset(pkt, 0, sizeof(*pkt));
2823
2824         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2825                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2826                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2827                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2828
2829         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2830             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2831                 bundling = 0;
2832
2833         /* Compute dif len and adjust data len to incude protection */
2834         data_bytes = cmd->bufflen;
2835         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2836
2837         switch (se_cmd->prot_op) {
2838         case TARGET_PROT_DIN_INSERT:
2839         case TARGET_PROT_DOUT_STRIP:
2840                 transfer_length = data_bytes;
2841                 if (cmd->prot_sg_cnt)
2842                         data_bytes += dif_bytes;
2843                 break;
2844         case TARGET_PROT_DIN_STRIP:
2845         case TARGET_PROT_DOUT_INSERT:
2846         case TARGET_PROT_DIN_PASS:
2847         case TARGET_PROT_DOUT_PASS:
2848                 transfer_length = data_bytes + dif_bytes;
2849                 break;
2850         default:
2851                 BUG();
2852                 break;
2853         }
2854
2855         if (!qlt_hba_err_chk_enabled(se_cmd))
2856                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2857         /* HBA error checking enabled */
2858         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2859                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2860                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2861                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2862                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2863                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2864         }
2865
2866         switch (se_cmd->prot_op) {
2867         case TARGET_PROT_DIN_INSERT:
2868         case TARGET_PROT_DOUT_INSERT:
2869                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2870                 break;
2871         case TARGET_PROT_DIN_STRIP:
2872         case TARGET_PROT_DOUT_STRIP:
2873                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2874                 break;
2875         case TARGET_PROT_DIN_PASS:
2876         case TARGET_PROT_DOUT_PASS:
2877                 fw_prot_opts |= PO_MODE_DIF_PASS;
2878                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2879                 break;
2880         default:/* Normal Request */
2881                 fw_prot_opts |= PO_MODE_DIF_PASS;
2882                 break;
2883         }
2884
2885         /* ---- PKT ---- */
2886         /* Update entry type to indicate Command Type CRC_2 IOCB */
2887         pkt->entry_type  = CTIO_CRC2;
2888         pkt->entry_count = 1;
2889         pkt->vp_index = vha->vp_idx;
2890
2891         h = qlt_make_handle(vha);
2892         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2893                 /*
2894                  * CTIO type 7 from the firmware doesn't provide a way to
2895                  * know the initiator's LOOP ID, hence we can't find
2896                  * the session and, so, the command.
2897                  */
2898                 return -EAGAIN;
2899         } else
2900                 ha->tgt.cmds[h-1] = prm->cmd;
2901
2902         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2903         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2904         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2905         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2906         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2907         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2908         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2909
2910         /* silence compile warning */
2911         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2912         pkt->ox_id  = cpu_to_le16(t16);
2913
2914         t16 = (atio->u.isp24.attr << 9);
2915         pkt->flags |= cpu_to_le16(t16);
2916         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2917
2918         /* Set transfer direction */
2919         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2920                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2921         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2922                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2923
2924         pkt->dseg_count = prm->tot_dsds;
2925         /* Fibre channel byte count */
2926         pkt->transfer_length = cpu_to_le32(transfer_length);
2927
2928         /* ----- CRC context -------- */
2929
2930         /* Allocate CRC context from global pool */
2931         crc_ctx_pkt = cmd->ctx =
2932             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2933
2934         if (!crc_ctx_pkt)
2935                 goto crc_queuing_error;
2936
2937         /* Zero out CTX area. */
2938         clr_ptr = (uint8_t *)crc_ctx_pkt;
2939         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2940
2941         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2942         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2943
2944         /* Set handle */
2945         crc_ctx_pkt->handle = pkt->handle;
2946
2947         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2948
2949         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2950         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2951         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2952
2953         if (!bundling) {
2954                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2955         } else {
2956                 /*
2957                  * Configure Bundling if we need to fetch interlaving
2958                  * protection PCI accesses
2959                  */
2960                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2961                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2962                 crc_ctx_pkt->u.bundling.dseg_count =
2963                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2964                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2965         }
2966
2967         /* Finish the common fields of CRC pkt */
2968         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2969         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2970         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2971         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2972
2973         memset((uint8_t *)&tc, 0 , sizeof(tc));
2974         tc.vha = vha;
2975         tc.blk_sz = cmd->blk_sz;
2976         tc.bufflen = cmd->bufflen;
2977         tc.sg = cmd->sg;
2978         tc.prot_sg = cmd->prot_sg;
2979         tc.ctx = crc_ctx_pkt;
2980         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
2981
2982         /* Walks data segments */
2983         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2984
2985         if (!bundling && prm->prot_seg_cnt) {
2986                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2987                         prm->tot_dsds, &tc))
2988                         goto crc_queuing_error;
2989         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2990                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
2991                 goto crc_queuing_error;
2992
2993         if (bundling && prm->prot_seg_cnt) {
2994                 /* Walks dif segments */
2995                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2996
2997                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2998                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2999                         prm->prot_seg_cnt, &tc))
3000                         goto crc_queuing_error;
3001         }
3002         return QLA_SUCCESS;
3003
3004 crc_queuing_error:
3005         /* Cleanup will be performed by the caller */
3006         vha->hw->tgt.cmds[h - 1] = NULL;
3007
3008         return QLA_FUNCTION_FAILED;
3009 }
3010
3011 /*
3012  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3013  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3014  */
3015 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3016         uint8_t scsi_status)
3017 {
3018         struct scsi_qla_host *vha = cmd->vha;
3019         struct qla_hw_data *ha = vha->hw;
3020         struct ctio7_to_24xx *pkt;
3021         struct qla_tgt_prm prm;
3022         uint32_t full_req_cnt = 0;
3023         unsigned long flags = 0;
3024         int res;
3025
3026         spin_lock_irqsave(&ha->hardware_lock, flags);
3027         if (cmd->sess && cmd->sess->deleted) {
3028                 cmd->state = QLA_TGT_STATE_PROCESSED;
3029                 if (cmd->sess->logout_completed)
3030                         /* no need to terminate. FW already freed exchange. */
3031                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3032                 else
3033                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3034                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3035                 return 0;
3036         }
3037         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3038
3039         memset(&prm, 0, sizeof(prm));
3040
3041         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
3042             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
3043             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3044             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3045             &cmd->se_cmd);
3046
3047         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3048             &full_req_cnt);
3049         if (unlikely(res != 0)) {
3050                 return res;
3051         }
3052
3053         spin_lock_irqsave(&ha->hardware_lock, flags);
3054
3055         if (xmit_type == QLA_TGT_XMIT_STATUS)
3056                 vha->tgt_counters.core_qla_snd_status++;
3057         else
3058                 vha->tgt_counters.core_qla_que_buf++;
3059
3060         if (!ha->flags.fw_started || cmd->reset_count != ha->chip_reset) {
3061                 /*
3062                  * Either the port is not online or this request was from
3063                  * previous life, just abort the processing.
3064                  */
3065                 cmd->state = QLA_TGT_STATE_PROCESSED;
3066                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3067                 ql_dbg(ql_dbg_async, vha, 0xe101,
3068                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3069                         vha->flags.online, qla2x00_reset_active(vha),
3070                         cmd->reset_count, ha->chip_reset);
3071                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3072                 return 0;
3073         }
3074
3075         /* Does F/W have an IOCBs for this request */
3076         res = qlt_check_reserve_free_req(vha, full_req_cnt);
3077         if (unlikely(res))
3078                 goto out_unmap_unlock;
3079
3080         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3081                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
3082         else
3083                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
3084         if (unlikely(res != 0)) {
3085                 vha->req->cnt += full_req_cnt;
3086                 goto out_unmap_unlock;
3087         }
3088
3089         pkt = (struct ctio7_to_24xx *)prm.pkt;
3090
3091         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3092                 pkt->u.status0.flags |=
3093                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3094                         CTIO7_FLAGS_STATUS_MODE_0);
3095
3096                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3097                         qlt_load_data_segments(&prm, vha);
3098
3099                 if (prm.add_status_pkt == 0) {
3100                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3101                                 pkt->u.status0.scsi_status =
3102                                     cpu_to_le16(prm.rq_result);
3103                                 pkt->u.status0.residual =
3104                                     cpu_to_le32(prm.residual);
3105                                 pkt->u.status0.flags |= cpu_to_le16(
3106                                     CTIO7_FLAGS_SEND_STATUS);
3107                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
3108                                         pkt->u.status0.flags |=
3109                                             cpu_to_le16(
3110                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3111                                                 CTIO7_FLAGS_CONFORM_REQ);
3112                                 }
3113                         }
3114
3115                 } else {
3116                         /*
3117                          * We have already made sure that there is sufficient
3118                          * amount of request entries to not drop HW lock in
3119                          * req_pkt().
3120                          */
3121                         struct ctio7_to_24xx *ctio =
3122                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
3123
3124                         ql_dbg(ql_dbg_io, vha, 0x305e,
3125                             "Building additional status packet 0x%p.\n",
3126                             ctio);
3127
3128                         /*
3129                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3130                          * ctio7_to_24xx
3131                          */
3132                         memcpy(ctio, pkt, sizeof(*ctio));
3133                         /* reset back to CTIO7 */
3134                         ctio->entry_count = 1;
3135                         ctio->entry_type = CTIO_TYPE7;
3136                         ctio->dseg_count = 0;
3137                         ctio->u.status1.flags &= ~cpu_to_le16(
3138                             CTIO7_FLAGS_DATA_IN);
3139
3140                         /* Real finish is ctio_m1's finish */
3141                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3142                         pkt->u.status0.flags |= cpu_to_le16(
3143                             CTIO7_FLAGS_DONT_RET_CTIO);
3144
3145                         /* qlt_24xx_init_ctio_to_isp will correct
3146                          * all neccessary fields that's part of CTIO7.
3147                          * There should be no residual of CTIO-CRC2 data.
3148                          */
3149                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3150                             &prm);
3151                         pr_debug("Status CTIO7: %p\n", ctio);
3152                 }
3153         } else
3154                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3155
3156
3157         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3158         cmd->cmd_sent_to_fw = 1;
3159
3160         /* Memory Barrier */
3161         wmb();
3162         qla2x00_start_iocbs(vha, vha->req);
3163         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3164
3165         return 0;
3166
3167 out_unmap_unlock:
3168         qlt_unmap_sg(vha, cmd);
3169         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3170
3171         return res;
3172 }
3173 EXPORT_SYMBOL(qlt_xmit_response);
3174
3175 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3176 {
3177         struct ctio7_to_24xx *pkt;
3178         struct scsi_qla_host *vha = cmd->vha;
3179         struct qla_hw_data *ha = vha->hw;
3180         struct qla_tgt *tgt = cmd->tgt;
3181         struct qla_tgt_prm prm;
3182         unsigned long flags;
3183         int res = 0;
3184
3185         memset(&prm, 0, sizeof(prm));
3186         prm.cmd = cmd;
3187         prm.tgt = tgt;
3188         prm.sg = NULL;
3189         prm.req_cnt = 1;
3190
3191         /* Send marker if required */
3192         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
3193                 return -EIO;
3194
3195         /* Calculate number of entries and segments required */
3196         if (qlt_pci_map_calc_cnt(&prm) != 0)
3197                 return -EAGAIN;
3198
3199         spin_lock_irqsave(&ha->hardware_lock, flags);
3200
3201         if (!ha->flags.fw_started || (cmd->reset_count != ha->chip_reset) ||
3202             (cmd->sess && cmd->sess->deleted)) {
3203                 /*
3204                  * Either the port is not online or this request was from
3205                  * previous life, just abort the processing.
3206                  */
3207                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3208                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3209                 ql_dbg(ql_dbg_async, vha, 0xe102,
3210                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3211                         vha->flags.online, qla2x00_reset_active(vha),
3212                         cmd->reset_count, ha->chip_reset);
3213                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3214                 return 0;
3215         }
3216
3217         /* Does F/W have an IOCBs for this request */
3218         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
3219         if (res != 0)
3220                 goto out_unlock_free_unmap;
3221         if (cmd->se_cmd.prot_op)
3222                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
3223         else
3224                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
3225
3226         if (unlikely(res != 0)) {
3227                 vha->req->cnt += prm.req_cnt;
3228                 goto out_unlock_free_unmap;
3229         }
3230
3231         pkt = (struct ctio7_to_24xx *)prm.pkt;
3232         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3233             CTIO7_FLAGS_STATUS_MODE_0);
3234
3235         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3236                 qlt_load_data_segments(&prm, vha);
3237
3238         cmd->state = QLA_TGT_STATE_NEED_DATA;
3239         cmd->cmd_sent_to_fw = 1;
3240
3241         /* Memory Barrier */
3242         wmb();
3243         qla2x00_start_iocbs(vha, vha->req);
3244         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3245
3246         return res;
3247
3248 out_unlock_free_unmap:
3249         qlt_unmap_sg(vha, cmd);
3250         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3251
3252         return res;
3253 }
3254 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3255
3256
3257 /*
3258  * it is assumed either hardware_lock or qpair lock is held.
3259  */
3260 static void
3261 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
3262         struct ctio_crc_from_fw *sts)
3263 {
3264         uint8_t         *ap = &sts->actual_dif[0];
3265         uint8_t         *ep = &sts->expected_dif[0];
3266         uint64_t        lba = cmd->se_cmd.t_task_lba;
3267         uint8_t scsi_status, sense_key, asc, ascq;
3268         unsigned long flags;
3269
3270         cmd->trc_flags |= TRC_DIF_ERR;
3271
3272         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3273         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3274         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3275
3276         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3277         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3278         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3279
3280         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3281             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3282
3283         scsi_status = sense_key = asc = ascq = 0;
3284
3285         /* check appl tag */
3286         if (cmd->e_app_tag != cmd->a_app_tag) {
3287                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3288                         "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3289                         "Ref[%x|%x], App[%x|%x], "
3290                         "Guard [%x|%x] cmd=%p ox_id[%04x]",
3291                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3292                         cmd->a_ref_tag, cmd->e_ref_tag,
3293                         cmd->a_app_tag, cmd->e_app_tag,
3294                         cmd->a_guard, cmd->e_guard,
3295                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3296
3297                 cmd->dif_err_code = DIF_ERR_APP;
3298                 scsi_status = SAM_STAT_CHECK_CONDITION;
3299                 sense_key = ABORTED_COMMAND;
3300                 asc = 0x10;
3301                 ascq = 0x2;
3302         }
3303
3304         /* check ref tag */
3305         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3306                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3307                         "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3308                         "Ref[%x|%x], App[%x|%x], "
3309                         "Guard[%x|%x] cmd=%p ox_id[%04x] ",
3310                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3311                         cmd->a_ref_tag, cmd->e_ref_tag,
3312                         cmd->a_app_tag, cmd->e_app_tag,
3313                         cmd->a_guard, cmd->e_guard,
3314                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3315
3316                 cmd->dif_err_code = DIF_ERR_REF;
3317                 scsi_status = SAM_STAT_CHECK_CONDITION;
3318                 sense_key = ABORTED_COMMAND;
3319                 asc = 0x10;
3320                 ascq = 0x3;
3321                 goto out;
3322         }
3323
3324         /* check guard */
3325         if (cmd->e_guard != cmd->a_guard) {
3326                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3327                         "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3328                         "Ref[%x|%x], App[%x|%x], "
3329                         "Guard [%x|%x] cmd=%p ox_id[%04x]",
3330                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3331                         cmd->a_ref_tag, cmd->e_ref_tag,
3332                         cmd->a_app_tag, cmd->e_app_tag,
3333                         cmd->a_guard, cmd->e_guard,
3334                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3335                 cmd->dif_err_code = DIF_ERR_GRD;
3336                 scsi_status = SAM_STAT_CHECK_CONDITION;
3337                 sense_key = ABORTED_COMMAND;
3338                 asc = 0x10;
3339                 ascq = 0x1;
3340         }
3341 out:
3342         switch (cmd->state) {
3343         case QLA_TGT_STATE_NEED_DATA:
3344                 /* handle_data will load DIF error code  */
3345                 cmd->state = QLA_TGT_STATE_DATA_IN;
3346                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3347                 break;
3348         default:
3349                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3350                 if (cmd->aborted) {
3351                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3352                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3353                         break;
3354                 }
3355                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3356
3357                 qlt_send_resp_ctio(vha, cmd, scsi_status, sense_key, asc, ascq);
3358                 /* assume scsi status gets out on the wire.
3359                  * Will not wait for completion.
3360                  */
3361                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3362                 break;
3363         }
3364 }
3365
3366 /* If hardware_lock held on entry, might drop it, then reaquire */
3367 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3368 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3369         struct imm_ntfy_from_isp *ntfy)
3370 {
3371         struct nack_to_isp *nack;
3372         struct qla_hw_data *ha = vha->hw;
3373         request_t *pkt;
3374         int ret = 0;
3375
3376         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3377             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3378
3379         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3380         if (pkt == NULL) {
3381                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3382                     "qla_target(%d): %s failed: unable to allocate "
3383                     "request packet\n", vha->vp_idx, __func__);
3384                 return -ENOMEM;
3385         }
3386
3387         pkt->entry_type = NOTIFY_ACK_TYPE;
3388         pkt->entry_count = 1;
3389         pkt->handle = QLA_TGT_SKIP_HANDLE;
3390
3391         nack = (struct nack_to_isp *)pkt;
3392         nack->ox_id = ntfy->ox_id;
3393
3394         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3395         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3396                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3397                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3398         }
3399
3400         /* terminate */
3401         nack->u.isp24.flags |=
3402                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3403
3404         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3405         nack->u.isp24.status = ntfy->u.isp24.status;
3406         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3407         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3408         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3409         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3410         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3411         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3412
3413         qla2x00_start_iocbs(vha, vha->req);
3414         return ret;
3415 }
3416
3417 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3418         struct imm_ntfy_from_isp *imm, int ha_locked)
3419 {
3420         unsigned long flags = 0;
3421         int rc;
3422
3423         if (qlt_issue_marker(vha, ha_locked) < 0)
3424                 return;
3425
3426         if (ha_locked) {
3427                 rc = __qlt_send_term_imm_notif(vha, imm);
3428
3429 #if 0   /* Todo  */
3430                 if (rc == -ENOMEM)
3431                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3432 #else
3433                 if (rc) {
3434                 }
3435 #endif
3436                 goto done;
3437         }
3438
3439         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3440         rc = __qlt_send_term_imm_notif(vha, imm);
3441
3442 #if 0   /* Todo */
3443         if (rc == -ENOMEM)
3444                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3445 #endif
3446
3447 done:
3448         if (!ha_locked)
3449                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3450 }
3451
3452 /* If hardware_lock held on entry, might drop it, then reaquire */
3453 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3454 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3455         struct qla_tgt_cmd *cmd,
3456         struct atio_from_isp *atio)
3457 {
3458         struct ctio7_to_24xx *ctio24;
3459         struct qla_hw_data *ha = vha->hw;
3460         request_t *pkt;
3461         int ret = 0;
3462         uint16_t temp;
3463
3464         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3465
3466         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3467         if (pkt == NULL) {
3468                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3469                     "qla_target(%d): %s failed: unable to allocate "
3470                     "request packet\n", vha->vp_idx, __func__);
3471                 return -ENOMEM;
3472         }
3473
3474         if (cmd != NULL) {
3475                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3476                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3477                             "qla_target(%d): Terminating cmd %p with "
3478                             "incorrect state %d\n", vha->vp_idx, cmd,
3479                             cmd->state);
3480                 } else
3481                         ret = 1;
3482         }
3483
3484         vha->tgt_counters.num_term_xchg_sent++;
3485         pkt->entry_count = 1;
3486         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3487
3488         ctio24 = (struct ctio7_to_24xx *)pkt;
3489         ctio24->entry_type = CTIO_TYPE7;
3490         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3491         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3492         ctio24->vp_index = vha->vp_idx;
3493         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3494         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3495         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3496         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3497         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3498             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3499                 CTIO7_FLAGS_TERMINATE);
3500         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3501         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3502
3503         /* Most likely, it isn't needed */
3504         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3505             &atio->u.isp24.fcp_cmnd.add_cdb[
3506             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3507         if (ctio24->u.status1.residual != 0)
3508                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3509
3510         /* Memory Barrier */
3511         wmb();
3512         qla2x00_start_iocbs(vha, vha->req);
3513         return ret;
3514 }
3515
3516 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3517         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3518         int ul_abort)
3519 {
3520         unsigned long flags = 0;
3521         int rc;
3522
3523         if (qlt_issue_marker(vha, ha_locked) < 0)
3524                 return;
3525
3526         if (ha_locked) {
3527                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3528                 if (rc == -ENOMEM)
3529                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3530                 goto done;
3531         }
3532         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3533         rc = __qlt_send_term_exchange(vha, cmd, atio);
3534         if (rc == -ENOMEM)
3535                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3536
3537 done:
3538         if (cmd && !ul_abort && !cmd->aborted) {
3539                 if (cmd->sg_mapped)
3540                         qlt_unmap_sg(vha, cmd);
3541                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3542         }
3543
3544         if (!ha_locked)
3545                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3546
3547         return;
3548 }
3549
3550 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3551 {
3552         struct list_head free_list;
3553         struct qla_tgt_cmd *cmd, *tcmd;
3554
3555         vha->hw->tgt.leak_exchg_thresh_hold =
3556             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3557
3558         cmd = tcmd = NULL;
3559         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3560                 INIT_LIST_HEAD(&free_list);
3561                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3562
3563                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3564                         list_del(&cmd->cmd_list);
3565                         /* This cmd was never sent to TCM.  There is no need
3566                          * to schedule free or call free_cmd
3567                          */
3568                         qlt_free_cmd(cmd);
3569                         vha->hw->tgt.num_qfull_cmds_alloc--;
3570                 }
3571         }
3572         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3573 }
3574
3575 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3576 {
3577         uint32_t total_leaked;
3578
3579         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3580
3581         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3582             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3583
3584                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3585                     "Chip reset due to exchange starvation: %d/%d.\n",
3586                     total_leaked, vha->hw->cur_fw_xcb_count);
3587
3588                 if (IS_P3P_TYPE(vha->hw))
3589                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3590                 else
3591                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3592                 qla2xxx_wake_dpc(vha);
3593         }
3594
3595 }
3596
3597 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3598 {
3599         struct qla_tgt *tgt = cmd->tgt;
3600         struct scsi_qla_host *vha = tgt->vha;
3601         struct se_cmd *se_cmd = &cmd->se_cmd;
3602         unsigned long flags;
3603
3604         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3605             "qla_target(%d): terminating exchange for aborted cmd=%p "
3606             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3607             se_cmd->tag);
3608
3609         spin_lock_irqsave(&cmd->cmd_lock, flags);
3610         if (cmd->aborted) {
3611                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3612                 /*
3613                  * It's normal to see 2 calls in this path:
3614                  *  1) XFER Rdy completion + CMD_T_ABORT
3615                  *  2) TCM TMR - drain_state_list
3616                  */
3617                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3618                         "multiple abort. %p transport_state %x, t_state %x,"
3619                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3620                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3621                 return EIO;
3622         }
3623         cmd->aborted = 1;
3624         cmd->trc_flags |= TRC_ABORT;
3625         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3626
3627         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3628         return 0;
3629 }
3630 EXPORT_SYMBOL(qlt_abort_cmd);
3631
3632 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3633 {
3634         struct fc_port *sess = cmd->sess;
3635
3636         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3637             "%s: se_cmd[%p] ox_id %04x\n",
3638             __func__, &cmd->se_cmd,
3639             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3640
3641         BUG_ON(cmd->cmd_in_wq);
3642
3643         if (cmd->sg_mapped)
3644                 qlt_unmap_sg(cmd->vha, cmd);
3645
3646         if (!cmd->q_full)
3647                 qlt_decr_num_pend_cmds(cmd->vha);
3648
3649         BUG_ON(cmd->sg_mapped);
3650         cmd->jiffies_at_free = get_jiffies_64();
3651         if (unlikely(cmd->free_sg))
3652                 kfree(cmd->sg);
3653
3654         if (!sess || !sess->se_sess) {
3655                 WARN_ON(1);
3656                 return;
3657         }
3658         cmd->jiffies_at_free = get_jiffies_64();
3659         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3660 }
3661 EXPORT_SYMBOL(qlt_free_cmd);
3662
3663 /*
3664  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3665  */
3666 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3667         struct qla_tgt_cmd *cmd, uint32_t status)
3668 {
3669         int term = 0;
3670
3671         if (cmd->se_cmd.prot_op)
3672                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3673                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3674                     "se_cmd=%p tag[%x] op %#x/%s",
3675                      cmd->lba, cmd->lba,
3676                      cmd->num_blks, &cmd->se_cmd,
3677                      cmd->atio.u.isp24.exchange_addr,
3678                      cmd->se_cmd.prot_op,
3679                      prot_op_str(cmd->se_cmd.prot_op));
3680
3681         if (ctio != NULL) {
3682                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3683                 term = !(c->flags &
3684                     cpu_to_le16(OF_TERM_EXCH));
3685         } else
3686                 term = 1;
3687
3688         if (term)
3689                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3690
3691         return term;
3692 }
3693
3694 /* ha->hardware_lock supposed to be held on entry */
3695 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3696         uint32_t handle)
3697 {
3698         struct qla_hw_data *ha = vha->hw;
3699
3700         handle--;
3701         if (ha->tgt.cmds[handle] != NULL) {
3702                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3703                 ha->tgt.cmds[handle] = NULL;
3704                 return cmd;
3705         } else
3706                 return NULL;
3707 }
3708
3709 /* ha->hardware_lock supposed to be held on entry */
3710 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3711         uint32_t handle, void *ctio)
3712 {
3713         struct qla_tgt_cmd *cmd = NULL;
3714
3715         /* Clear out internal marks */
3716         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3717             CTIO_INTERMEDIATE_HANDLE_MARK);
3718
3719         if (handle != QLA_TGT_NULL_HANDLE) {
3720                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3721                         return NULL;
3722
3723                 /* handle-1 is actually used */
3724                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3725                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3726                             "qla_target(%d): Wrong handle %x received\n",
3727                             vha->vp_idx, handle);
3728                         return NULL;
3729                 }
3730                 cmd = qlt_get_cmd(vha, handle);
3731                 if (unlikely(cmd == NULL)) {
3732                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3733                             "qla_target(%d): Suspicious: unable to "
3734                             "find the command with handle %x\n", vha->vp_idx,
3735                             handle);
3736                         return NULL;
3737                 }
3738         } else if (ctio != NULL) {
3739                 /* We can't get loop ID from CTIO7 */
3740                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3741                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3742                     "support NULL handles\n", vha->vp_idx);
3743                 return NULL;
3744         }
3745
3746         return cmd;
3747 }
3748
3749 /* hardware_lock should be held by caller. */
3750 static void
3751 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3752 {
3753         struct qla_hw_data *ha = vha->hw;
3754         uint32_t handle;
3755
3756         if (cmd->sg_mapped)
3757                 qlt_unmap_sg(vha, cmd);
3758
3759         handle = qlt_make_handle(vha);
3760
3761         /* TODO: fix debug message type and ids. */
3762         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3763                 ql_dbg(ql_dbg_io, vha, 0xff00,
3764                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3765         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3766                 cmd->write_data_transferred = 0;
3767                 cmd->state = QLA_TGT_STATE_DATA_IN;
3768
3769                 ql_dbg(ql_dbg_io, vha, 0xff01,
3770                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3771
3772                 ha->tgt.tgt_ops->handle_data(cmd);
3773                 return;
3774         } else {
3775                 ql_dbg(ql_dbg_io, vha, 0xff03,
3776                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3777                     cmd->state);
3778                 dump_stack();
3779         }
3780
3781         cmd->trc_flags |= TRC_FLUSH;
3782         ha->tgt.tgt_ops->free_cmd(cmd);
3783 }
3784
3785 void
3786 qlt_host_reset_handler(struct qla_hw_data *ha)
3787 {
3788         struct qla_tgt_cmd *cmd;
3789         unsigned long flags;
3790         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3791         scsi_qla_host_t *vha = NULL;
3792         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3793         uint32_t i;
3794
3795         if (!base_vha->hw->tgt.tgt_ops)
3796                 return;
3797
3798         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3799                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3800                         "Target mode disabled\n");
3801                 return;
3802         }
3803
3804         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3805             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3806             base_vha->dpc_flags);
3807
3808         spin_lock_irqsave(&ha->hardware_lock, flags);
3809         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3810                 cmd = qlt_get_cmd(base_vha, i);
3811                 if (!cmd)
3812                         continue;
3813                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3814                 vha = cmd->vha;
3815                 qlt_abort_cmd_on_host_reset(vha, cmd);
3816         }
3817         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3818 }
3819
3820
3821 /*
3822  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3823  */
3824 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3825         uint32_t status, void *ctio)
3826 {
3827         struct qla_hw_data *ha = vha->hw;
3828         struct se_cmd *se_cmd;
3829         struct qla_tgt_cmd *cmd;
3830
3831         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3832                 /* That could happen only in case of an error/reset/abort */
3833                 if (status != CTIO_SUCCESS) {
3834                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3835                             "Intermediate CTIO received"
3836                             " (status %x)\n", status);
3837                 }
3838                 return;
3839         }
3840
3841         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3842         if (cmd == NULL)
3843                 return;
3844
3845         se_cmd = &cmd->se_cmd;
3846         cmd->cmd_sent_to_fw = 0;
3847
3848         qlt_unmap_sg(vha, cmd);
3849
3850         if (unlikely(status != CTIO_SUCCESS)) {
3851                 switch (status & 0xFFFF) {
3852                 case CTIO_LIP_RESET:
3853                 case CTIO_TARGET_RESET:
3854                 case CTIO_ABORTED:
3855                         /* driver request abort via Terminate exchange */
3856                 case CTIO_TIMEOUT:
3857                 case CTIO_INVALID_RX_ID:
3858                         /* They are OK */
3859                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3860                             "qla_target(%d): CTIO with "
3861                             "status %#x received, state %x, se_cmd %p, "
3862                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3863                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3864                             status, cmd->state, se_cmd);
3865                         break;
3866
3867                 case CTIO_PORT_LOGGED_OUT:
3868                 case CTIO_PORT_UNAVAILABLE:
3869                 {
3870                         int logged_out =
3871                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3872
3873                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3874                             "qla_target(%d): CTIO with %s status %x "
3875                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3876                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3877                             status, cmd->state, se_cmd);
3878
3879                         if (logged_out && cmd->sess) {
3880                                 /*
3881                                  * Session is already logged out, but we need
3882                                  * to notify initiator, who's not aware of this
3883                                  */
3884                                 cmd->sess->logout_on_delete = 0;
3885                                 cmd->sess->send_els_logo = 1;
3886                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
3887                                     "%s %d %8phC post del sess\n",
3888                                     __func__, __LINE__, cmd->sess->port_name);
3889
3890                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3891                         }
3892                         break;
3893                 }
3894                 case CTIO_DIF_ERROR: {
3895                         struct ctio_crc_from_fw *crc =
3896                                 (struct ctio_crc_from_fw *)ctio;
3897                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3898                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3899                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3900                             "expect_dif[0x%llx]\n",
3901                             vha->vp_idx, status, cmd->state, se_cmd,
3902                             *((u64 *)&crc->actual_dif[0]),
3903                             *((u64 *)&crc->expected_dif[0]));
3904
3905                         qlt_handle_dif_error(vha, cmd, ctio);
3906                         return;
3907                 }
3908                 default:
3909                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3910                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3911                             vha->vp_idx, status, cmd->state, se_cmd);
3912                         break;
3913                 }
3914
3915
3916                 /* "cmd->aborted" means
3917                  * cmd is already aborted/terminated, we don't
3918                  * need to terminate again.  The exchange is already
3919                  * cleaned up/freed at FW level.  Just cleanup at driver
3920                  * level.
3921                  */
3922                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3923                     (!cmd->aborted)) {
3924                         cmd->trc_flags |= TRC_CTIO_ERR;
3925                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3926                                 return;
3927                 }
3928         }
3929
3930         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3931                 cmd->trc_flags |= TRC_CTIO_DONE;
3932         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3933                 cmd->state = QLA_TGT_STATE_DATA_IN;
3934
3935                 if (status == CTIO_SUCCESS)
3936                         cmd->write_data_transferred = 1;
3937
3938                 ha->tgt.tgt_ops->handle_data(cmd);
3939                 return;
3940         } else if (cmd->aborted) {
3941                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3942                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3943                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3944         } else {
3945                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3946                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3947                     "qla_target(%d): A command in state (%d) should "
3948                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3949         }
3950
3951         if (unlikely(status != CTIO_SUCCESS) &&
3952                 !cmd->aborted) {
3953                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3954                 dump_stack();
3955         }
3956
3957         ha->tgt.tgt_ops->free_cmd(cmd);
3958 }
3959
3960 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3961         uint8_t task_codes)
3962 {
3963         int fcp_task_attr;
3964
3965         switch (task_codes) {
3966         case ATIO_SIMPLE_QUEUE:
3967                 fcp_task_attr = TCM_SIMPLE_TAG;
3968                 break;
3969         case ATIO_HEAD_OF_QUEUE:
3970                 fcp_task_attr = TCM_HEAD_TAG;
3971                 break;
3972         case ATIO_ORDERED_QUEUE:
3973                 fcp_task_attr = TCM_ORDERED_TAG;
3974                 break;
3975         case ATIO_ACA_QUEUE:
3976                 fcp_task_attr = TCM_ACA_TAG;
3977                 break;
3978         case ATIO_UNTAGGED:
3979                 fcp_task_attr = TCM_SIMPLE_TAG;
3980                 break;
3981         default:
3982                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3983                     "qla_target: unknown task code %x, use ORDERED instead\n",
3984                     task_codes);
3985                 fcp_task_attr = TCM_ORDERED_TAG;
3986                 break;
3987         }
3988
3989         return fcp_task_attr;
3990 }
3991
3992 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3993                                         uint8_t *);
3994 /*
3995  * Process context for I/O path into tcm_qla2xxx code
3996  */
3997 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3998 {
3999         scsi_qla_host_t *vha = cmd->vha;
4000         struct qla_hw_data *ha = vha->hw;
4001         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4002         struct fc_port *sess = cmd->sess;
4003         struct atio_from_isp *atio = &cmd->atio;
4004         unsigned char *cdb;
4005         unsigned long flags;
4006         uint32_t data_length;
4007         int ret, fcp_task_attr, data_dir, bidi = 0;
4008
4009         cmd->cmd_in_wq = 0;
4010         cmd->trc_flags |= TRC_DO_WORK;
4011         if (tgt->tgt_stop)
4012                 goto out_term;
4013
4014         if (cmd->aborted) {
4015                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4016                     "cmd with tag %u is aborted\n",
4017                     cmd->atio.u.isp24.exchange_addr);
4018                 goto out_term;
4019         }
4020
4021         spin_lock_init(&cmd->cmd_lock);
4022         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4023         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4024         cmd->unpacked_lun = scsilun_to_int(
4025             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4026
4027         if (atio->u.isp24.fcp_cmnd.rddata &&
4028             atio->u.isp24.fcp_cmnd.wrdata) {
4029                 bidi = 1;
4030                 data_dir = DMA_TO_DEVICE;
4031         } else if (atio->u.isp24.fcp_cmnd.rddata)
4032                 data_dir = DMA_FROM_DEVICE;
4033         else if (atio->u.isp24.fcp_cmnd.wrdata)
4034                 data_dir = DMA_TO_DEVICE;
4035         else
4036                 data_dir = DMA_NONE;
4037
4038         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4039             atio->u.isp24.fcp_cmnd.task_attr);
4040         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4041             &atio->u.isp24.fcp_cmnd.add_cdb[
4042             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4043
4044         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4045                                           fcp_task_attr, data_dir, bidi);
4046         if (ret != 0)
4047                 goto out_term;
4048         /*
4049          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4050          */
4051         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4052         ha->tgt.tgt_ops->put_sess(sess);
4053         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4054         return;
4055
4056 out_term:
4057         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4058         /*
4059          * cmd has not sent to target yet, so pass NULL as the second
4060          * argument to qlt_send_term_exchange() and free the memory here.
4061          */
4062         cmd->trc_flags |= TRC_DO_WORK_ERR;
4063         spin_lock_irqsave(&ha->hardware_lock, flags);
4064         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
4065
4066         qlt_decr_num_pend_cmds(vha);
4067         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4068         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4069
4070         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4071         ha->tgt.tgt_ops->put_sess(sess);
4072         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4073 }
4074
4075 static void qlt_do_work(struct work_struct *work)
4076 {
4077         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4078         scsi_qla_host_t *vha = cmd->vha;
4079         unsigned long flags;
4080
4081         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4082         list_del(&cmd->cmd_list);
4083         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4084
4085         __qlt_do_work(cmd);
4086 }
4087
4088 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4089                                        struct fc_port *sess,
4090                                        struct atio_from_isp *atio)
4091 {
4092         struct se_session *se_sess = sess->se_sess;
4093         struct qla_tgt_cmd *cmd;
4094         int tag;
4095
4096         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4097         if (tag < 0)
4098                 return NULL;
4099
4100         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4101         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4102
4103         memcpy(&cmd->atio, atio, sizeof(*atio));
4104         cmd->state = QLA_TGT_STATE_NEW;
4105         cmd->tgt = vha->vha_tgt.qla_tgt;
4106         qlt_incr_num_pend_cmds(vha);
4107         cmd->vha = vha;
4108         cmd->se_cmd.map_tag = tag;
4109         cmd->sess = sess;
4110         cmd->loop_id = sess->loop_id;
4111         cmd->conf_compl_supported = sess->conf_compl_supported;
4112
4113         cmd->trc_flags = 0;
4114         cmd->jiffies_at_alloc = get_jiffies_64();
4115
4116         cmd->reset_count = vha->hw->chip_reset;
4117
4118         return cmd;
4119 }
4120
4121 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
4122                           uint16_t);
4123
4124 static void qlt_create_sess_from_atio(struct work_struct *work)
4125 {
4126         struct qla_tgt_sess_op *op = container_of(work,
4127                                         struct qla_tgt_sess_op, work);
4128         scsi_qla_host_t *vha = op->vha;
4129         struct qla_hw_data *ha = vha->hw;
4130         struct fc_port *sess;
4131         struct qla_tgt_cmd *cmd;
4132         unsigned long flags;
4133         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4134
4135         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4136         list_del(&op->cmd_list);
4137         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4138
4139         if (op->aborted) {
4140                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4141                     "sess_op with tag %u is aborted\n",
4142                     op->atio.u.isp24.exchange_addr);
4143                 goto out_term;
4144         }
4145
4146         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4147             "qla_target(%d): Unable to find wwn login"
4148             " (s_id %x:%x:%x), trying to create it manually\n",
4149             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4150
4151         if (op->atio.u.raw.entry_count > 1) {
4152                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4153                     "Dropping multy entry atio %p\n", &op->atio);
4154                 goto out_term;
4155         }
4156
4157         sess = qlt_make_local_sess(vha, s_id);
4158         /* sess has an extra creation ref. */
4159
4160         if (!sess)
4161                 goto out_term;
4162         /*
4163          * Now obtain a pre-allocated session tag using the original op->atio
4164          * packet header, and dispatch into __qlt_do_work() using the existing
4165          * process context.
4166          */
4167         cmd = qlt_get_tag(vha, sess, &op->atio);
4168         if (!cmd) {
4169                 spin_lock_irqsave(&ha->hardware_lock, flags);
4170                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
4171                 ha->tgt.tgt_ops->put_sess(sess);
4172                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4173                 kfree(op);
4174                 return;
4175         }
4176
4177         /*
4178          * __qlt_do_work() will call qlt_put_sess() to release
4179          * the extra reference taken above by qlt_make_local_sess()
4180          */
4181         __qlt_do_work(cmd);
4182         kfree(op);
4183         return;
4184 out_term:
4185         spin_lock_irqsave(&ha->hardware_lock, flags);
4186         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
4187         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4188         kfree(op);
4189 }
4190
4191 /* ha->hardware_lock supposed to be held on entry */
4192 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4193         struct atio_from_isp *atio)
4194 {
4195         struct qla_hw_data *ha = vha->hw;
4196         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4197         struct fc_port *sess;
4198         struct qla_tgt_cmd *cmd;
4199         unsigned long flags;
4200
4201         if (unlikely(tgt->tgt_stop)) {
4202                 ql_dbg(ql_dbg_io, vha, 0x3061,
4203                     "New command while device %p is shutting down\n", tgt);
4204                 return -EFAULT;
4205         }
4206
4207         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4208         if (unlikely(!sess)) {
4209                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4210                                                      GFP_ATOMIC);
4211                 if (!op)
4212                         return -ENOMEM;
4213
4214                 memcpy(&op->atio, atio, sizeof(*atio));
4215                 op->vha = vha;
4216
4217                 spin_lock(&vha->cmd_list_lock);
4218                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4219                 spin_unlock(&vha->cmd_list_lock);
4220
4221                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4222                 queue_work(qla_tgt_wq, &op->work);
4223                 return 0;
4224         }
4225
4226         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4227          * session deletion, but it's still in sess_del_work wq */
4228         if (sess->deleted) {
4229                 ql_dbg(ql_dbg_io, vha, 0x3061,
4230                     "New command while old session %p is being deleted\n",
4231                     sess);
4232                 return -EFAULT;
4233         }
4234
4235         /*
4236          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4237          */
4238         if (!kref_get_unless_zero(&sess->sess_kref)) {
4239                 ql_dbg(ql_dbg_tgt, vha, 0xffff,
4240                     "%s: kref_get fail, %8phC oxid %x \n",
4241                     __func__, sess->port_name,
4242                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4243                 return -EFAULT;
4244         }
4245
4246         cmd = qlt_get_tag(vha, sess, atio);
4247         if (!cmd) {
4248                 ql_dbg(ql_dbg_io, vha, 0x3062,
4249                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4250                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4251                 ha->tgt.tgt_ops->put_sess(sess);
4252                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4253                 return -ENOMEM;
4254         }
4255
4256         cmd->cmd_in_wq = 1;
4257         cmd->trc_flags |= TRC_NEW_CMD;
4258         cmd->se_cmd.cpuid = ha->msix_count ?
4259                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4260
4261         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4262         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4263         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4264
4265         INIT_WORK(&cmd->work, qlt_do_work);
4266         if (ha->msix_count) {
4267                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4268                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4269                             &cmd->work);
4270                 else
4271                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4272                             &cmd->work);
4273         } else {
4274                 queue_work(qla_tgt_wq, &cmd->work);
4275         }
4276         return 0;
4277
4278 }
4279
4280 /* ha->hardware_lock supposed to be held on entry */
4281 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4282         int fn, void *iocb, int flags)
4283 {
4284         struct scsi_qla_host *vha = sess->vha;
4285         struct qla_hw_data *ha = vha->hw;
4286         struct qla_tgt_mgmt_cmd *mcmd;
4287         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4288         int res;
4289
4290         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4291         if (!mcmd) {
4292                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4293                     "qla_target(%d): Allocation of management "
4294                     "command failed, some commands and their data could "
4295                     "leak\n", vha->vp_idx);
4296                 return -ENOMEM;
4297         }
4298         memset(mcmd, 0, sizeof(*mcmd));
4299         mcmd->sess = sess;
4300
4301         if (iocb) {
4302                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4303                     sizeof(mcmd->orig_iocb.imm_ntfy));
4304         }
4305         mcmd->tmr_func = fn;
4306         mcmd->flags = flags;
4307         mcmd->reset_count = vha->hw->chip_reset;
4308
4309         switch (fn) {
4310         case QLA_TGT_LUN_RESET:
4311             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4312             break;
4313         }
4314
4315         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4316         if (res != 0) {
4317                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4318                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4319                     sess->vha->vp_idx, res);
4320                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4321                 return -EFAULT;
4322         }
4323
4324         return 0;
4325 }
4326
4327 /* ha->hardware_lock supposed to be held on entry */
4328 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4329 {
4330         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4331         struct qla_hw_data *ha = vha->hw;
4332         struct qla_tgt *tgt;
4333         struct fc_port *sess;
4334         uint32_t lun, unpacked_lun;
4335         int fn;
4336         unsigned long flags;
4337
4338         tgt = vha->vha_tgt.qla_tgt;
4339
4340         lun = a->u.isp24.fcp_cmnd.lun;
4341         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4342
4343         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4344         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4345             a->u.isp24.fcp_hdr.s_id);
4346         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4347
4348         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4349
4350         if (!sess) {
4351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4352                     "qla_target(%d): task mgmt fn 0x%x for "
4353                     "non-existant session\n", vha->vp_idx, fn);
4354                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4355                     sizeof(struct atio_from_isp));
4356         }
4357
4358         if (sess->deleted)
4359                 return -EFAULT;
4360
4361         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4362 }
4363
4364 /* ha->hardware_lock supposed to be held on entry */
4365 static int __qlt_abort_task(struct scsi_qla_host *vha,
4366         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4367 {
4368         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4369         struct qla_hw_data *ha = vha->hw;
4370         struct qla_tgt_mgmt_cmd *mcmd;
4371         uint32_t lun, unpacked_lun;
4372         int rc;
4373
4374         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4375         if (mcmd == NULL) {
4376                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4377                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4378                     vha->vp_idx, __func__);
4379                 return -ENOMEM;
4380         }
4381         memset(mcmd, 0, sizeof(*mcmd));
4382
4383         mcmd->sess = sess;
4384         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4385             sizeof(mcmd->orig_iocb.imm_ntfy));
4386
4387         lun = a->u.isp24.fcp_cmnd.lun;
4388         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4389         mcmd->reset_count = vha->hw->chip_reset;
4390         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4391
4392         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4393             le16_to_cpu(iocb->u.isp2x.seq_id));
4394         if (rc != 0) {
4395                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4396                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4397                     vha->vp_idx, rc);
4398                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4399                 return -EFAULT;
4400         }
4401
4402         return 0;
4403 }
4404
4405 /* ha->hardware_lock supposed to be held on entry */
4406 static int qlt_abort_task(struct scsi_qla_host *vha,
4407         struct imm_ntfy_from_isp *iocb)
4408 {
4409         struct qla_hw_data *ha = vha->hw;
4410         struct fc_port *sess;
4411         int loop_id;
4412         unsigned long flags;
4413
4414         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4415
4416         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4417         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4418         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4419
4420         if (sess == NULL) {
4421                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4422                     "qla_target(%d): task abort for unexisting "
4423                     "session\n", vha->vp_idx);
4424                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4425                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4426         }
4427
4428         return __qlt_abort_task(vha, iocb, sess);
4429 }
4430
4431 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4432 {
4433         if (rc != MBS_COMMAND_COMPLETE) {
4434                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4435                         "%s: se_sess %p / sess %p from"
4436                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4437                         " LOGO failed: %#x\n",
4438                         __func__,
4439                         fcport->se_sess,
4440                         fcport,
4441                         fcport->port_name, fcport->loop_id,
4442                         fcport->d_id.b.domain, fcport->d_id.b.area,
4443                         fcport->d_id.b.al_pa, rc);
4444         }
4445
4446         fcport->logout_completed = 1;
4447 }
4448
4449 /*
4450 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4451 *
4452 * Schedules sessions with matching port_id/loop_id but different wwn for
4453 * deletion. Returns existing session with matching wwn if present.
4454 * Null otherwise.
4455 */
4456 struct fc_port *
4457 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4458     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4459 {
4460         struct fc_port *sess = NULL, *other_sess;
4461         uint64_t other_wwn;
4462
4463         *conflict_sess = NULL;
4464
4465         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4466
4467                 other_wwn = wwn_to_u64(other_sess->port_name);
4468
4469                 if (wwn == other_wwn) {
4470                         WARN_ON(sess);
4471                         sess = other_sess;
4472                         continue;
4473                 }
4474
4475                 /* find other sess with nport_id collision */
4476                 if (port_id.b24 == other_sess->d_id.b24) {
4477                         if (loop_id != other_sess->loop_id) {
4478                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4479                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4480                                     other_sess, other_sess->loop_id, other_wwn);
4481
4482                                 /*
4483                                  * logout_on_delete is set by default, but another
4484                                  * session that has the same s_id/loop_id combo
4485                                  * might have cleared it when requested this session
4486                                  * deletion, so don't touch it
4487                                  */
4488                                 qlt_schedule_sess_for_deletion(other_sess, true);
4489                         } else {
4490                                 /*
4491                                  * Another wwn used to have our s_id/loop_id
4492                                  * kill the session, but don't free the loop_id
4493                                  */
4494                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
4495                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4496                                     other_sess, other_sess->loop_id, other_wwn);
4497
4498
4499                                 other_sess->keep_nport_handle = 1;
4500                                 *conflict_sess = other_sess;
4501                                 qlt_schedule_sess_for_deletion(other_sess,
4502                                     true);
4503                         }
4504                         continue;
4505                 }
4506
4507                 /* find other sess with nport handle collision */
4508                 if ((loop_id == other_sess->loop_id) &&
4509                         (loop_id != FC_NO_LOOP_ID)) {
4510                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4511                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4512                                other_sess, other_sess->loop_id, other_wwn);
4513
4514                         /* Same loop_id but different s_id
4515                          * Ok to kill and logout */
4516                         qlt_schedule_sess_for_deletion(other_sess, true);
4517                 }
4518         }
4519
4520         return sess;
4521 }
4522
4523 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4524 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4525 {
4526         struct qla_tgt_sess_op *op;
4527         struct qla_tgt_cmd *cmd;
4528         uint32_t key;
4529         int count = 0;
4530
4531         key = (((u32)s_id->b.domain << 16) |
4532                ((u32)s_id->b.area   <<  8) |
4533                ((u32)s_id->b.al_pa));
4534
4535         spin_lock(&vha->cmd_list_lock);
4536         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4537                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4538
4539                 if (op_key == key) {
4540                         op->aborted = true;
4541                         count++;
4542                 }
4543         }
4544
4545         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4546                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4547                 if (op_key == key) {
4548                         op->aborted = true;
4549                         count++;
4550                 }
4551         }
4552
4553         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4554                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4555                 if (cmd_key == key) {
4556                         cmd->aborted = 1;
4557                         count++;
4558                 }
4559         }
4560         spin_unlock(&vha->cmd_list_lock);
4561
4562         return count;
4563 }
4564
4565 /*
4566  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4567  */
4568 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4569         struct imm_ntfy_from_isp *iocb)
4570 {
4571         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4572         struct qla_hw_data *ha = vha->hw;
4573         struct fc_port *sess = NULL, *conflict_sess = NULL;
4574         uint64_t wwn;
4575         port_id_t port_id;
4576         uint16_t loop_id;
4577         uint16_t wd3_lo;
4578         int res = 0;
4579         struct qlt_plogi_ack_t *pla;
4580         unsigned long flags;
4581
4582         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4583
4584         port_id.b.domain = iocb->u.isp24.port_id[2];
4585         port_id.b.area   = iocb->u.isp24.port_id[1];
4586         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4587         port_id.b.rsvd_1 = 0;
4588
4589         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4590
4591         ql_dbg(ql_dbg_disc, vha, 0xf026,
4592             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4593             vha->vp_idx, iocb->u.isp24.port_id[2],
4594                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4595                    iocb->u.isp24.status_subcode, loop_id,
4596                 iocb->u.isp24.port_name);
4597
4598         /* res = 1 means ack at the end of thread
4599          * res = 0 means ack async/later.
4600          */
4601         switch (iocb->u.isp24.status_subcode) {
4602         case ELS_PLOGI:
4603
4604                 /* Mark all stale commands in qla_tgt_wq for deletion */
4605                 abort_cmds_for_s_id(vha, &port_id);
4606
4607                 if (wwn) {
4608                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4609                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4610                                 port_id, loop_id, &conflict_sess);
4611                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4612                 }
4613
4614                 if (IS_SW_RESV_ADDR(port_id)) {
4615                         res = 1;
4616                         break;
4617                 }
4618
4619                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4620                 if (!pla) {
4621                         qlt_send_term_imm_notif(vha, iocb, 1);
4622                         break;
4623                 }
4624
4625                 res = 0;
4626
4627                 if (conflict_sess) {
4628                         conflict_sess->login_gen++;
4629                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4630                                 QLT_PLOGI_LINK_CONFLICT);
4631                 }
4632
4633                 if (!sess) {
4634                         pla->ref_count++;
4635                         qla24xx_post_newsess_work(vha, &port_id,
4636                                 iocb->u.isp24.port_name, pla);
4637                         res = 0;
4638                         break;
4639                 }
4640
4641                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4642                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4643                 sess->d_id = port_id;
4644                 sess->login_gen++;
4645
4646                 switch (sess->disc_state) {
4647                 case DSC_DELETED:
4648                         qlt_plogi_ack_unref(vha, pla);
4649                         break;
4650
4651                 default:
4652                         /*
4653                          * Under normal circumstances we want to release nport handle
4654                          * during LOGO process to avoid nport handle leaks inside FW.
4655                          * The exception is when LOGO is done while another PLOGI with
4656                          * the same nport handle is waiting as might be the case here.
4657                          * Note: there is always a possibily of a race where session
4658                          * deletion has already started for other reasons (e.g. ACL
4659                          * removal) and now PLOGI arrives:
4660                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4661                          *    FW must have assigned this PLOGI a new/same handle and we
4662                          *    can proceed ACK'ing it as usual when session deletion
4663                          *    completes.
4664                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4665                          *    bit reached it, the handle has now been released. We'll
4666                          *    get an error when we ACK this PLOGI. Nothing will be sent
4667                          *    back to initiator. Initiator should eventually retry
4668                          *    PLOGI and situation will correct itself.
4669                          */
4670                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4671                            (sess->d_id.b24 == port_id.b24));
4672
4673                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4674                                    "%s %d %8phC post del sess\n",
4675                                    __func__, __LINE__, sess->port_name);
4676
4677
4678                         qlt_schedule_sess_for_deletion_lock(sess);
4679                         break;
4680                 }
4681
4682                 break;
4683
4684         case ELS_PRLI:
4685                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4686
4687                 if (wwn) {
4688                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4689                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4690                                 loop_id, &conflict_sess);
4691                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4692                 }
4693
4694                 if (conflict_sess) {
4695                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4696                             "PRLI with conflicting sess %p port %8phC\n",
4697                             conflict_sess, conflict_sess->port_name);
4698                         qlt_send_term_imm_notif(vha, iocb, 1);
4699                         res = 0;
4700                         break;
4701                 }
4702
4703                 if (sess != NULL) {
4704                         if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
4705                             sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4706                                 /*
4707                                  * Impatient initiator sent PRLI before last
4708                                  * PLOGI could finish. Will force him to re-try,
4709                                  * while last one finishes.
4710                                  */
4711                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4712                                     "sess %p PRLI received, before plogi ack.\n",
4713                                     sess);
4714                                 qlt_send_term_imm_notif(vha, iocb, 1);
4715                                 res = 0;
4716                                 break;
4717                         }
4718
4719                         /*
4720                          * This shouldn't happen under normal circumstances,
4721                          * since we have deleted the old session during PLOGI
4722                          */
4723                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4724                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4725                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4726
4727                         sess->local = 0;
4728                         sess->loop_id = loop_id;
4729                         sess->d_id = port_id;
4730                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4731
4732                         if (wd3_lo & BIT_7)
4733                                 sess->conf_compl_supported = 1;
4734
4735                         if ((wd3_lo & BIT_4) == 0)
4736                                 sess->port_type = FCT_INITIATOR;
4737                         else
4738                                 sess->port_type = FCT_TARGET;
4739                 }
4740                 res = 1; /* send notify ack */
4741
4742                 /* Make session global (not used in fabric mode) */
4743                 if (ha->current_topology != ISP_CFG_F) {
4744                         if (sess) {
4745                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4746                                     "%s %d %8phC post nack\n",
4747                                     __func__, __LINE__, sess->port_name);
4748                                 qla24xx_post_nack_work(vha, sess, iocb,
4749                                         SRB_NACK_PRLI);
4750                                 res = 0;
4751                         } else {
4752                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4753                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4754                                 qla2xxx_wake_dpc(vha);
4755                         }
4756                 } else {
4757                         if (sess) {
4758                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4759                                     "%s %d %8phC post nack\n",
4760                                     __func__, __LINE__, sess->port_name);
4761                                 qla24xx_post_nack_work(vha, sess, iocb,
4762                                         SRB_NACK_PRLI);
4763                                 res = 0;
4764                         }
4765                 }
4766                 break;
4767
4768         case ELS_TPRLO:
4769                 if (le16_to_cpu(iocb->u.isp24.flags) &
4770                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4771                         loop_id = 0xFFFF;
4772                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4773                         res = 1;
4774                         break;
4775                 }
4776                 /* drop through */
4777         case ELS_LOGO:
4778         case ELS_PRLO:
4779                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4780                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4781                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4782
4783                 if (sess) {
4784                         sess->login_gen++;
4785                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4786                         sess->logo_ack_needed = 1;
4787                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4788                 }
4789
4790                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4791
4792                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4793                     "%s: logo %llx res %d sess %p ",
4794                     __func__, wwn, res, sess);
4795                 if (res == 0) {
4796                         /*
4797                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4798                          * for LOGO_ACK & sess delete
4799                          */
4800                         BUG_ON(!sess);
4801                         res = 0;
4802                 } else {
4803                         /* cmd did not go to upper layer. */
4804                         if (sess) {
4805                                 qlt_schedule_sess_for_deletion_lock(sess);
4806                                 res = 0;
4807                         }
4808                         /* else logo will be ack */
4809                 }
4810                 break;
4811         case ELS_PDISC:
4812         case ELS_ADISC:
4813         {
4814                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4815                 if (tgt->link_reinit_iocb_pending) {
4816                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4817                             0, 0, 0, 0, 0, 0);
4818                         tgt->link_reinit_iocb_pending = 0;
4819                 }
4820
4821                 sess = qla2x00_find_fcport_by_wwpn(vha,
4822                     iocb->u.isp24.port_name, 1);
4823                 if (sess) {
4824                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4825                                 "sess %p lid %d|%d DS %d LS %d\n",
4826                                 sess, sess->loop_id, loop_id,
4827                                 sess->disc_state, sess->fw_login_state);
4828                 }
4829
4830                 res = 1; /* send notify ack */
4831                 break;
4832         }
4833
4834         case ELS_FLOGI: /* should never happen */
4835         default:
4836                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4837                     "qla_target(%d): Unsupported ELS command %x "
4838                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4839                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4840                 break;
4841         }
4842
4843         return res;
4844 }
4845
4846 /*
4847  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4848  */
4849 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4850         struct imm_ntfy_from_isp *iocb)
4851 {
4852         struct qla_hw_data *ha = vha->hw;
4853         uint32_t add_flags = 0;
4854         int send_notify_ack = 1;
4855         uint16_t status;
4856
4857         status = le16_to_cpu(iocb->u.isp2x.status);
4858         switch (status) {
4859         case IMM_NTFY_LIP_RESET:
4860         {
4861                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4862                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4863                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4864                     iocb->u.isp24.status_subcode);
4865
4866                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4867                         send_notify_ack = 0;
4868                 break;
4869         }
4870
4871         case IMM_NTFY_LIP_LINK_REINIT:
4872         {
4873                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4874                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4875                     "qla_target(%d): LINK REINIT (loop %#x, "
4876                     "subcode %x)\n", vha->vp_idx,
4877                     le16_to_cpu(iocb->u.isp24.nport_handle),
4878                     iocb->u.isp24.status_subcode);
4879                 if (tgt->link_reinit_iocb_pending) {
4880                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4881                             0, 0, 0, 0, 0, 0);
4882                 }
4883                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4884                 tgt->link_reinit_iocb_pending = 1;
4885                 /*
4886                  * QLogic requires to wait after LINK REINIT for possible
4887                  * PDISC or ADISC ELS commands
4888                  */
4889                 send_notify_ack = 0;
4890                 break;
4891         }
4892
4893         case IMM_NTFY_PORT_LOGOUT:
4894                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4895                     "qla_target(%d): Port logout (loop "
4896                     "%#x, subcode %x)\n", vha->vp_idx,
4897                     le16_to_cpu(iocb->u.isp24.nport_handle),
4898                     iocb->u.isp24.status_subcode);
4899
4900                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4901                         send_notify_ack = 0;
4902                 /* The sessions will be cleared in the callback, if needed */
4903                 break;
4904
4905         case IMM_NTFY_GLBL_TPRLO:
4906                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4907                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4908                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4909                         send_notify_ack = 0;
4910                 /* The sessions will be cleared in the callback, if needed */
4911                 break;
4912
4913         case IMM_NTFY_PORT_CONFIG:
4914                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4915                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4916                     status);
4917                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4918                         send_notify_ack = 0;
4919                 /* The sessions will be cleared in the callback, if needed */
4920                 break;
4921
4922         case IMM_NTFY_GLBL_LOGO:
4923                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4924                     "qla_target(%d): Link failure detected\n",
4925                     vha->vp_idx);
4926                 /* I_T nexus loss */
4927                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4928                         send_notify_ack = 0;
4929                 break;
4930
4931         case IMM_NTFY_IOCB_OVERFLOW:
4932                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4933                     "qla_target(%d): Cannot provide requested "
4934                     "capability (IOCB overflowed the immediate notify "
4935                     "resource count)\n", vha->vp_idx);
4936                 break;
4937
4938         case IMM_NTFY_ABORT_TASK:
4939                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4940                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4941                     "L %#x)\n", vha->vp_idx,
4942                     le16_to_cpu(iocb->u.isp2x.seq_id),
4943                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4944                     le16_to_cpu(iocb->u.isp2x.lun));
4945                 if (qlt_abort_task(vha, iocb) == 0)
4946                         send_notify_ack = 0;
4947                 break;
4948
4949         case IMM_NTFY_RESOURCE:
4950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4951                     "qla_target(%d): Out of resources, host %ld\n",
4952                     vha->vp_idx, vha->host_no);
4953                 break;
4954
4955         case IMM_NTFY_MSG_RX:
4956                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4957                     "qla_target(%d): Immediate notify task %x\n",
4958                     vha->vp_idx, iocb->u.isp2x.task_flags);
4959                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4960                         send_notify_ack = 0;
4961                 break;
4962
4963         case IMM_NTFY_ELS:
4964                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4965                         send_notify_ack = 0;
4966                 break;
4967         default:
4968                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4969                     "qla_target(%d): Received unknown immediate "
4970                     "notify status %x\n", vha->vp_idx, status);
4971                 break;
4972         }
4973
4974         if (send_notify_ack)
4975                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4976 }
4977
4978 /*
4979  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4980  * This function sends busy to ISP 2xxx or 24xx.
4981  */
4982 static int __qlt_send_busy(struct scsi_qla_host *vha,
4983         struct atio_from_isp *atio, uint16_t status)
4984 {
4985         struct ctio7_to_24xx *ctio24;
4986         struct qla_hw_data *ha = vha->hw;
4987         request_t *pkt;
4988         struct fc_port *sess = NULL;
4989         unsigned long flags;
4990
4991         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4992         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4993             atio->u.isp24.fcp_hdr.s_id);
4994         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4995         if (!sess) {
4996                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
4997                 return 0;
4998         }
4999         /* Sending marker isn't necessary, since we called from ISR */
5000
5001         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5002         if (!pkt) {
5003                 ql_dbg(ql_dbg_io, vha, 0x3063,
5004                     "qla_target(%d): %s failed: unable to allocate "
5005                     "request packet", vha->vp_idx, __func__);
5006                 return -ENOMEM;
5007         }
5008
5009         vha->tgt_counters.num_q_full_sent++;
5010         pkt->entry_count = 1;
5011         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5012
5013         ctio24 = (struct ctio7_to_24xx *)pkt;
5014         ctio24->entry_type = CTIO_TYPE7;
5015         ctio24->nport_handle = sess->loop_id;
5016         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5017         ctio24->vp_index = vha->vp_idx;
5018         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5019         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5020         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5021         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5022         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5023             cpu_to_le16(
5024                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5025                 CTIO7_FLAGS_DONT_RET_CTIO);
5026         /*
5027          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5028          * if the explicit conformation is used.
5029          */
5030         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5031         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5032         /* Memory Barrier */
5033         wmb();
5034         qla2x00_start_iocbs(vha, vha->req);
5035         return 0;
5036 }
5037
5038 /*
5039  * This routine is used to allocate a command for either a QFull condition
5040  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5041  * out previously.
5042  */
5043 static void
5044 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5045         struct atio_from_isp *atio, uint16_t status, int qfull)
5046 {
5047         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5048         struct qla_hw_data *ha = vha->hw;
5049         struct fc_port *sess;
5050         struct se_session *se_sess;
5051         struct qla_tgt_cmd *cmd;
5052         int tag;
5053
5054         if (unlikely(tgt->tgt_stop)) {
5055                 ql_dbg(ql_dbg_io, vha, 0x300a,
5056                         "New command while device %p is shutting down\n", tgt);
5057                 return;
5058         }
5059
5060         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5061                 vha->hw->tgt.num_qfull_cmds_dropped++;
5062                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5063                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5064                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5065                                 vha->hw->tgt.num_qfull_cmds_dropped;
5066
5067                 ql_dbg(ql_dbg_io, vha, 0x3068,
5068                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5069                         vha->vp_idx, __func__,
5070                         vha->hw->tgt.num_qfull_cmds_dropped);
5071
5072                 qlt_chk_exch_leak_thresh_hold(vha);
5073                 return;
5074         }
5075
5076         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5077                 (vha, atio->u.isp24.fcp_hdr.s_id);
5078         if (!sess)
5079                 return;
5080
5081         se_sess = sess->se_sess;
5082
5083         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5084         if (tag < 0)
5085                 return;
5086
5087         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5088         if (!cmd) {
5089                 ql_dbg(ql_dbg_io, vha, 0x3009,
5090                         "qla_target(%d): %s: Allocation of cmd failed\n",
5091                         vha->vp_idx, __func__);
5092
5093                 vha->hw->tgt.num_qfull_cmds_dropped++;
5094                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5095                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5096                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5097                                 vha->hw->tgt.num_qfull_cmds_dropped;
5098
5099                 qlt_chk_exch_leak_thresh_hold(vha);
5100                 return;
5101         }
5102
5103         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5104
5105         qlt_incr_num_pend_cmds(vha);
5106         INIT_LIST_HEAD(&cmd->cmd_list);
5107         memcpy(&cmd->atio, atio, sizeof(*atio));
5108
5109         cmd->tgt = vha->vha_tgt.qla_tgt;
5110         cmd->vha = vha;
5111         cmd->reset_count = vha->hw->chip_reset;
5112         cmd->q_full = 1;
5113
5114         if (qfull) {
5115                 cmd->q_full = 1;
5116                 /* NOTE: borrowing the state field to carry the status */
5117                 cmd->state = status;
5118         } else
5119                 cmd->term_exchg = 1;
5120
5121         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5122
5123         vha->hw->tgt.num_qfull_cmds_alloc++;
5124         if (vha->hw->tgt.num_qfull_cmds_alloc >
5125                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5126                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5127                         vha->hw->tgt.num_qfull_cmds_alloc;
5128 }
5129
5130 int
5131 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5132 {
5133         struct qla_hw_data *ha = vha->hw;
5134         unsigned long flags;
5135         struct qla_tgt_cmd *cmd, *tcmd;
5136         struct list_head free_list;
5137         int rc = 0;
5138
5139         if (list_empty(&ha->tgt.q_full_list))
5140                 return 0;
5141
5142         INIT_LIST_HEAD(&free_list);
5143
5144         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5145
5146         if (list_empty(&ha->tgt.q_full_list)) {
5147                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5148                 return 0;
5149         }
5150
5151         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5152                 if (cmd->q_full)
5153                         /* cmd->state is a borrowed field to hold status */
5154                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5155                 else if (cmd->term_exchg)
5156                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5157
5158                 if (rc == -ENOMEM)
5159                         break;
5160
5161                 if (cmd->q_full)
5162                         ql_dbg(ql_dbg_io, vha, 0x3006,
5163                             "%s: busy sent for ox_id[%04x]\n", __func__,
5164                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5165                 else if (cmd->term_exchg)
5166                         ql_dbg(ql_dbg_io, vha, 0x3007,
5167                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5168                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5169                 else
5170                         ql_dbg(ql_dbg_io, vha, 0x3008,
5171                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5172                             cmd);
5173
5174                 list_del(&cmd->cmd_list);
5175                 list_add_tail(&cmd->cmd_list, &free_list);
5176
5177                 /* piggy back on hardware_lock for protection */
5178                 vha->hw->tgt.num_qfull_cmds_alloc--;
5179         }
5180         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5181
5182         cmd = NULL;
5183
5184         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5185                 list_del(&cmd->cmd_list);
5186                 /* This cmd was never sent to TCM.  There is no need
5187                  * to schedule free or call free_cmd
5188                  */
5189                 qlt_free_cmd(cmd);
5190         }
5191         return rc;
5192 }
5193
5194 static void
5195 qlt_send_busy(struct scsi_qla_host *vha,
5196         struct atio_from_isp *atio, uint16_t status)
5197 {
5198         int rc = 0;
5199
5200         rc = __qlt_send_busy(vha, atio, status);
5201         if (rc == -ENOMEM)
5202                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5203 }
5204
5205 static int
5206 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5207         struct atio_from_isp *atio, bool ha_locked)
5208 {
5209         struct qla_hw_data *ha = vha->hw;
5210         uint16_t status;
5211         unsigned long flags;
5212
5213         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5214                 return 0;
5215
5216         if (!ha_locked)
5217                 spin_lock_irqsave(&ha->hardware_lock, flags);
5218         status = temp_sam_status;
5219         qlt_send_busy(vha, atio, status);
5220         if (!ha_locked)
5221                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5222
5223         return 1;
5224 }
5225
5226 /* ha->hardware_lock supposed to be held on entry */
5227 /* called via callback from qla2xxx */
5228 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5229         struct atio_from_isp *atio, uint8_t ha_locked)
5230 {
5231         struct qla_hw_data *ha = vha->hw;
5232         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5233         int rc;
5234         unsigned long flags;
5235
5236         if (unlikely(tgt == NULL)) {
5237                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5238                     "ATIO pkt, but no tgt (ha %p)", ha);
5239                 return;
5240         }
5241         /*
5242          * In tgt_stop mode we also should allow all requests to pass.
5243          * Otherwise, some commands can stuck.
5244          */
5245
5246         tgt->atio_irq_cmd_count++;
5247
5248         switch (atio->u.raw.entry_type) {
5249         case ATIO_TYPE7:
5250                 if (unlikely(atio->u.isp24.exchange_addr ==
5251                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5252                         ql_dbg(ql_dbg_io, vha, 0x3065,
5253                             "qla_target(%d): ATIO_TYPE7 "
5254                             "received with UNKNOWN exchange address, "
5255                             "sending QUEUE_FULL\n", vha->vp_idx);
5256                         if (!ha_locked)
5257                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5258                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5259                         if (!ha_locked)
5260                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5261                         break;
5262                 }
5263
5264
5265
5266                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5267                         rc = qlt_chk_qfull_thresh_hold(vha, atio, ha_locked);
5268                         if (rc != 0) {
5269                                 tgt->atio_irq_cmd_count--;
5270                                 return;
5271                         }
5272                         rc = qlt_handle_cmd_for_atio(vha, atio);
5273                 } else {
5274                         rc = qlt_handle_task_mgmt(vha, atio);
5275                 }
5276                 if (unlikely(rc != 0)) {
5277                         if (rc == -ESRCH) {
5278                                 if (!ha_locked)
5279                                         spin_lock_irqsave
5280                                                 (&ha->hardware_lock, flags);
5281
5282 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5283                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5284 #else
5285                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5286 #endif
5287
5288                                 if (!ha_locked)
5289                                         spin_unlock_irqrestore
5290                                                 (&ha->hardware_lock, flags);
5291
5292                         } else {
5293                                 if (tgt->tgt_stop) {
5294                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5295                                             "qla_target: Unable to send "
5296                                             "command to target for req, "
5297                                             "ignoring.\n");
5298                                 } else {
5299                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5300                                             "qla_target(%d): Unable to send "
5301                                             "command to target, sending BUSY "
5302                                             "status.\n", vha->vp_idx);
5303                                         if (!ha_locked)
5304                                                 spin_lock_irqsave(
5305                                                     &ha->hardware_lock, flags);
5306                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5307                                         if (!ha_locked)
5308                                                 spin_unlock_irqrestore(
5309                                                     &ha->hardware_lock, flags);
5310                                 }
5311                         }
5312                 }
5313                 break;
5314
5315         case IMMED_NOTIFY_TYPE:
5316         {
5317                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5318                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5319                             "qla_target(%d): Received ATIO packet %x "
5320                             "with error status %x\n", vha->vp_idx,
5321                             atio->u.raw.entry_type,
5322                             atio->u.isp2x.entry_status);
5323                         break;
5324                 }
5325                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5326
5327                 if (!ha_locked)
5328                         spin_lock_irqsave(&ha->hardware_lock, flags);
5329                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5330                 if (!ha_locked)
5331                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5332                 break;
5333         }
5334
5335         default:
5336                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5337                     "qla_target(%d): Received unknown ATIO atio "
5338                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5339                 break;
5340         }
5341
5342         tgt->atio_irq_cmd_count--;
5343 }
5344
5345 /* ha->hardware_lock supposed to be held on entry */
5346 /* called via callback from qla2xxx */
5347 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5348 {
5349         struct qla_hw_data *ha = vha->hw;
5350         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5351
5352         if (unlikely(tgt == NULL)) {
5353                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5354                     "qla_target(%d): Response pkt %x received, but no "
5355                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5356                 return;
5357         }
5358
5359         /*
5360          * In tgt_stop mode we also should allow all requests to pass.
5361          * Otherwise, some commands can stuck.
5362          */
5363
5364         tgt->irq_cmd_count++;
5365
5366         switch (pkt->entry_type) {
5367         case CTIO_CRC2:
5368         case CTIO_TYPE7:
5369         {
5370                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5371                 qlt_do_ctio_completion(vha, entry->handle,
5372                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5373                     entry);
5374                 break;
5375         }
5376
5377         case ACCEPT_TGT_IO_TYPE:
5378         {
5379                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5380                 int rc;
5381                 if (atio->u.isp2x.status !=
5382                     cpu_to_le16(ATIO_CDB_VALID)) {
5383                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5384                             "qla_target(%d): ATIO with error "
5385                             "status %x received\n", vha->vp_idx,
5386                             le16_to_cpu(atio->u.isp2x.status));
5387                         break;
5388                 }
5389
5390                 rc = qlt_chk_qfull_thresh_hold(vha, atio, true);
5391                 if (rc != 0) {
5392                         tgt->irq_cmd_count--;
5393                         return;
5394                 }
5395
5396                 rc = qlt_handle_cmd_for_atio(vha, atio);
5397                 if (unlikely(rc != 0)) {
5398                         if (rc == -ESRCH) {
5399 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5400                                 qlt_send_busy(vha, atio, 0);
5401 #else
5402                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5403 #endif
5404                         } else {
5405                                 if (tgt->tgt_stop) {
5406                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5407                                             "qla_target: Unable to send "
5408                                             "command to target, sending TERM "
5409                                             "EXCHANGE for rsp\n");
5410                                         qlt_send_term_exchange(vha, NULL,
5411                                             atio, 1, 0);
5412                                 } else {
5413                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5414                                             "qla_target(%d): Unable to send "
5415                                             "command to target, sending BUSY "
5416                                             "status\n", vha->vp_idx);
5417                                         qlt_send_busy(vha, atio, 0);
5418                                 }
5419                         }
5420                 }
5421         }
5422         break;
5423
5424         case CONTINUE_TGT_IO_TYPE:
5425         {
5426                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5427                 qlt_do_ctio_completion(vha, entry->handle,
5428                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5429                     entry);
5430                 break;
5431         }
5432
5433         case CTIO_A64_TYPE:
5434         {
5435                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5436                 qlt_do_ctio_completion(vha, entry->handle,
5437                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5438                     entry);
5439                 break;
5440         }
5441
5442         case IMMED_NOTIFY_TYPE:
5443                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5444                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5445                 break;
5446
5447         case NOTIFY_ACK_TYPE:
5448                 if (tgt->notify_ack_expected > 0) {
5449                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5450                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5451                             "NOTIFY_ACK seq %08x status %x\n",
5452                             le16_to_cpu(entry->u.isp2x.seq_id),
5453                             le16_to_cpu(entry->u.isp2x.status));
5454                         tgt->notify_ack_expected--;
5455                         if (entry->u.isp2x.status !=
5456                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5457                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5458                                     "qla_target(%d): NOTIFY_ACK "
5459                                     "failed %x\n", vha->vp_idx,
5460                                     le16_to_cpu(entry->u.isp2x.status));
5461                         }
5462                 } else {
5463                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5464                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5465                             vha->vp_idx);
5466                 }
5467                 break;
5468
5469         case ABTS_RECV_24XX:
5470                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5471                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5472                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5473                 break;
5474
5475         case ABTS_RESP_24XX:
5476                 if (tgt->abts_resp_expected > 0) {
5477                         struct abts_resp_from_24xx_fw *entry =
5478                                 (struct abts_resp_from_24xx_fw *)pkt;
5479                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5480                             "ABTS_RESP_24XX: compl_status %x\n",
5481                             entry->compl_status);
5482                         tgt->abts_resp_expected--;
5483                         if (le16_to_cpu(entry->compl_status) !=
5484                             ABTS_RESP_COMPL_SUCCESS) {
5485                                 if ((entry->error_subcode1 == 0x1E) &&
5486                                     (entry->error_subcode2 == 0)) {
5487                                         /*
5488                                          * We've got a race here: aborted
5489                                          * exchange not terminated, i.e.
5490                                          * response for the aborted command was
5491                                          * sent between the abort request was
5492                                          * received and processed.
5493                                          * Unfortunately, the firmware has a
5494                                          * silly requirement that all aborted
5495                                          * exchanges must be explicitely
5496                                          * terminated, otherwise it refuses to
5497                                          * send responses for the abort
5498                                          * requests. So, we have to
5499                                          * (re)terminate the exchange and retry
5500                                          * the abort response.
5501                                          */
5502                                         qlt_24xx_retry_term_exchange(vha,
5503                                             entry);
5504                                 } else
5505                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5506                                             "qla_target(%d): ABTS_RESP_24XX "
5507                                             "failed %x (subcode %x:%x)",
5508                                             vha->vp_idx, entry->compl_status,
5509                                             entry->error_subcode1,
5510                                             entry->error_subcode2);
5511                         }
5512                 } else {
5513                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5514                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5515                             "received\n", vha->vp_idx);
5516                 }
5517                 break;
5518
5519         default:
5520                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5521                     "qla_target(%d): Received unknown response pkt "
5522                     "type %x\n", vha->vp_idx, pkt->entry_type);
5523                 break;
5524         }
5525
5526         tgt->irq_cmd_count--;
5527 }
5528
5529 /*
5530  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5531  */
5532 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5533         uint16_t *mailbox)
5534 {
5535         struct qla_hw_data *ha = vha->hw;
5536         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5537         int login_code;
5538
5539         if (!ha->tgt.tgt_ops)
5540                 return;
5541
5542         if (unlikely(tgt == NULL)) {
5543                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5544                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5545                 return;
5546         }
5547
5548         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5549             IS_QLA2100(ha))
5550                 return;
5551         /*
5552          * In tgt_stop mode we also should allow all requests to pass.
5553          * Otherwise, some commands can stuck.
5554          */
5555
5556         tgt->irq_cmd_count++;
5557
5558         switch (code) {
5559         case MBA_RESET:                 /* Reset */
5560         case MBA_SYSTEM_ERR:            /* System Error */
5561         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5562         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5563                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5564                     "qla_target(%d): System error async event %#x "
5565                     "occurred", vha->vp_idx, code);
5566                 break;
5567         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5568                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5569                 break;
5570
5571         case MBA_LOOP_UP:
5572         {
5573                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5574                     "qla_target(%d): Async LOOP_UP occurred "
5575                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5576                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5577                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5578                 if (tgt->link_reinit_iocb_pending) {
5579                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5580                             0, 0, 0, 0, 0, 0);
5581                         tgt->link_reinit_iocb_pending = 0;
5582                 }
5583                 break;
5584         }
5585
5586         case MBA_LIP_OCCURRED:
5587         case MBA_LOOP_DOWN:
5588         case MBA_LIP_RESET:
5589         case MBA_RSCN_UPDATE:
5590                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5591                     "qla_target(%d): Async event %#x occurred "
5592                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5593                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5594                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5595                 break;
5596
5597         case MBA_REJECTED_FCP_CMD:
5598                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
5599                         "qla_target(%d): Async event LS_REJECT occurred "
5600                         "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5601                         le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5602                         le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5603
5604                 if (le16_to_cpu(mailbox[3]) == 1) {
5605                         /* exchange starvation. */
5606                         vha->hw->exch_starvation++;
5607                         if (vha->hw->exch_starvation > 5) {
5608                                 ql_log(ql_log_warn, vha, 0xffff,
5609                                     "Exchange starvation-. Resetting RISC\n");
5610
5611                                 vha->hw->exch_starvation = 0;
5612                                 if (IS_P3P_TYPE(vha->hw))
5613                                         set_bit(FCOE_CTX_RESET_NEEDED,
5614                                             &vha->dpc_flags);
5615                                 else
5616                                         set_bit(ISP_ABORT_NEEDED,
5617                                             &vha->dpc_flags);
5618                                 qla2xxx_wake_dpc(vha);
5619                         }
5620                 }
5621                 break;
5622
5623         case MBA_PORT_UPDATE:
5624                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5625                     "qla_target(%d): Port update async event %#x "
5626                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5627                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5628                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5629                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5630
5631                 login_code = le16_to_cpu(mailbox[2]);
5632                 if (login_code == 0x4) {
5633                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5634                             "Async MB 2: Got PLOGI Complete\n");
5635                         vha->hw->exch_starvation = 0;
5636                 } else if (login_code == 0x7)
5637                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5638                             "Async MB 2: Port Logged Out\n");
5639                 break;
5640         default:
5641                 break;
5642         }
5643
5644         tgt->irq_cmd_count--;
5645 }
5646
5647 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5648         uint16_t loop_id)
5649 {
5650         fc_port_t *fcport, *tfcp, *del;
5651         int rc;
5652         unsigned long flags;
5653         u8 newfcport = 0;
5654
5655         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5656         if (!fcport) {
5657                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5658                     "qla_target(%d): Allocation of tmp FC port failed",
5659                     vha->vp_idx);
5660                 return NULL;
5661         }
5662
5663         fcport->loop_id = loop_id;
5664
5665         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5666         if (rc != QLA_SUCCESS) {
5667                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5668                     "qla_target(%d): Failed to retrieve fcport "
5669                     "information -- get_port_database() returned %x "
5670                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5671                 kfree(fcport);
5672                 return NULL;
5673         }
5674
5675         del = NULL;
5676         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5677         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5678
5679         if (tfcp) {
5680                 tfcp->d_id = fcport->d_id;
5681                 tfcp->port_type = fcport->port_type;
5682                 tfcp->supported_classes = fcport->supported_classes;
5683                 tfcp->flags |= fcport->flags;
5684
5685                 del = fcport;
5686                 fcport = tfcp;
5687         } else {
5688                 if (vha->hw->current_topology == ISP_CFG_F)
5689                         fcport->flags |= FCF_FABRIC_DEVICE;
5690
5691                 list_add_tail(&fcport->list, &vha->vp_fcports);
5692                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5693                    vha->fcport_count++;
5694                 fcport->login_gen++;
5695                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5696                 fcport->login_succ = 1;
5697                 newfcport = 1;
5698         }
5699
5700         fcport->deleted = 0;
5701         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5702
5703         switch (vha->host->active_mode) {
5704         case MODE_INITIATOR:
5705         case MODE_DUAL:
5706                 if (newfcport) {
5707                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5708                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5709                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5710                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5711                                 qla24xx_post_upd_fcport_work(vha, fcport);
5712                         } else {
5713                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5714                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5715                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5716                                 qla24xx_post_gpsc_work(vha, fcport);
5717                         }
5718                 }
5719                 break;
5720
5721         case MODE_TARGET:
5722         default:
5723                 break;
5724         }
5725         if (del)
5726                 qla2x00_free_fcport(del);
5727
5728         return fcport;
5729 }
5730
5731 /* Must be called under tgt_mutex */
5732 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5733         uint8_t *s_id)
5734 {
5735         struct fc_port *sess = NULL;
5736         fc_port_t *fcport = NULL;
5737         int rc, global_resets;
5738         uint16_t loop_id = 0;
5739
5740         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5741                 /*
5742                  * This is Domain Controller, so it should be
5743                  * OK to drop SCSI commands from it.
5744                  */
5745                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5746                     "Unable to find initiator with S_ID %x:%x:%x",
5747                     s_id[0], s_id[1], s_id[2]);
5748                 return NULL;
5749         }
5750
5751         mutex_lock(&vha->vha_tgt.tgt_mutex);
5752
5753 retry:
5754         global_resets =
5755             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5756
5757         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5758         if (rc != 0) {
5759                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5760
5761                 ql_log(ql_log_info, vha, 0xf071,
5762                     "qla_target(%d): Unable to find "
5763                     "initiator with S_ID %x:%x:%x",
5764                     vha->vp_idx, s_id[0], s_id[1],
5765                     s_id[2]);
5766
5767                 if (rc == -ENOENT) {
5768                         qlt_port_logo_t logo;
5769                         sid_to_portid(s_id, &logo.id);
5770                         logo.cmd_count = 1;
5771                         qlt_send_first_logo(vha, &logo);
5772                 }
5773
5774                 return NULL;
5775         }
5776
5777         fcport = qlt_get_port_database(vha, loop_id);
5778         if (!fcport) {
5779                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5780                 return NULL;
5781         }
5782
5783         if (global_resets !=
5784             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5785                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5786                     "qla_target(%d): global reset during session discovery "
5787                     "(counter was %d, new %d), retrying", vha->vp_idx,
5788                     global_resets,
5789                     atomic_read(&vha->vha_tgt.
5790                         qla_tgt->tgt_global_resets_count));
5791                 goto retry;
5792         }
5793
5794         sess = qlt_create_sess(vha, fcport, true);
5795
5796         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5797
5798         return sess;
5799 }
5800
5801 static void qlt_abort_work(struct qla_tgt *tgt,
5802         struct qla_tgt_sess_work_param *prm)
5803 {
5804         struct scsi_qla_host *vha = tgt->vha;
5805         struct qla_hw_data *ha = vha->hw;
5806         struct fc_port *sess = NULL;
5807         unsigned long flags = 0, flags2 = 0;
5808         uint32_t be_s_id;
5809         uint8_t s_id[3];
5810         int rc;
5811
5812         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5813
5814         if (tgt->tgt_stop)
5815                 goto out_term2;
5816
5817         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5818         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5819         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5820
5821         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5822             (unsigned char *)&be_s_id);
5823         if (!sess) {
5824                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5825
5826                 sess = qlt_make_local_sess(vha, s_id);
5827                 /* sess has got an extra creation ref */
5828
5829                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5830                 if (!sess)
5831                         goto out_term2;
5832         } else {
5833                 if (sess->deleted) {
5834                         sess = NULL;
5835                         goto out_term2;
5836                 }
5837
5838                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5839                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5840                             "%s: kref_get fail %8phC \n",
5841                              __func__, sess->port_name);
5842                         sess = NULL;
5843                         goto out_term2;
5844                 }
5845         }
5846
5847         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5848         ha->tgt.tgt_ops->put_sess(sess);
5849         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5850
5851         if (rc != 0)
5852                 goto out_term;
5853         return;
5854
5855 out_term2:
5856         if (sess)
5857                 ha->tgt.tgt_ops->put_sess(sess);
5858         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5859
5860 out_term:
5861         spin_lock_irqsave(&ha->hardware_lock, flags);
5862         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5863         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5864 }
5865
5866 static void qlt_tmr_work(struct qla_tgt *tgt,
5867         struct qla_tgt_sess_work_param *prm)
5868 {
5869         struct atio_from_isp *a = &prm->tm_iocb2;
5870         struct scsi_qla_host *vha = tgt->vha;
5871         struct qla_hw_data *ha = vha->hw;
5872         struct fc_port *sess = NULL;
5873         unsigned long flags;
5874         uint8_t *s_id = NULL; /* to hide compiler warnings */
5875         int rc;
5876         uint32_t lun, unpacked_lun;
5877         int fn;
5878         void *iocb;
5879
5880         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5881
5882         if (tgt->tgt_stop)
5883                 goto out_term2;
5884
5885         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5886         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5887         if (!sess) {
5888                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5889
5890                 sess = qlt_make_local_sess(vha, s_id);
5891                 /* sess has got an extra creation ref */
5892
5893                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5894                 if (!sess)
5895                         goto out_term2;
5896         } else {
5897                 if (sess->deleted) {
5898                         sess = NULL;
5899                         goto out_term2;
5900                 }
5901
5902                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5903                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5904                             "%s: kref_get fail %8phC\n",
5905                              __func__, sess->port_name);
5906                         sess = NULL;
5907                         goto out_term2;
5908                 }
5909         }
5910
5911         iocb = a;
5912         lun = a->u.isp24.fcp_cmnd.lun;
5913         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5914         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5915
5916         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5917         ha->tgt.tgt_ops->put_sess(sess);
5918         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5919
5920         if (rc != 0)
5921                 goto out_term;
5922         return;
5923
5924 out_term2:
5925         if (sess)
5926                 ha->tgt.tgt_ops->put_sess(sess);
5927         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5928 out_term:
5929         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5930 }
5931
5932 static void qlt_sess_work_fn(struct work_struct *work)
5933 {
5934         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5935         struct scsi_qla_host *vha = tgt->vha;
5936         unsigned long flags;
5937
5938         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5939
5940         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5941         while (!list_empty(&tgt->sess_works_list)) {
5942                 struct qla_tgt_sess_work_param *prm = list_entry(
5943                     tgt->sess_works_list.next, typeof(*prm),
5944                     sess_works_list_entry);
5945
5946                 /*
5947                  * This work can be scheduled on several CPUs at time, so we
5948                  * must delete the entry to eliminate double processing
5949                  */
5950                 list_del(&prm->sess_works_list_entry);
5951
5952                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5953
5954                 switch (prm->type) {
5955                 case QLA_TGT_SESS_WORK_ABORT:
5956                         qlt_abort_work(tgt, prm);
5957                         break;
5958                 case QLA_TGT_SESS_WORK_TM:
5959                         qlt_tmr_work(tgt, prm);
5960                         break;
5961                 default:
5962                         BUG_ON(1);
5963                         break;
5964                 }
5965
5966                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5967
5968                 kfree(prm);
5969         }
5970         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5971 }
5972
5973 /* Must be called under tgt_host_action_mutex */
5974 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5975 {
5976         struct qla_tgt *tgt;
5977
5978         if (!QLA_TGT_MODE_ENABLED())
5979                 return 0;
5980
5981         if (!IS_TGT_MODE_CAPABLE(ha)) {
5982                 ql_log(ql_log_warn, base_vha, 0xe070,
5983                     "This adapter does not support target mode.\n");
5984                 return 0;
5985         }
5986
5987         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5988             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5989
5990         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5991
5992         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5993         if (!tgt) {
5994                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5995                     "Unable to allocate struct qla_tgt\n");
5996                 return -ENOMEM;
5997         }
5998
5999         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6000                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6001
6002         tgt->ha = ha;
6003         tgt->vha = base_vha;
6004         init_waitqueue_head(&tgt->waitQ);
6005         INIT_LIST_HEAD(&tgt->del_sess_list);
6006         spin_lock_init(&tgt->sess_work_lock);
6007         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6008         INIT_LIST_HEAD(&tgt->sess_works_list);
6009         atomic_set(&tgt->tgt_global_resets_count, 0);
6010
6011         base_vha->vha_tgt.qla_tgt = tgt;
6012
6013         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6014                 "qla_target(%d): using 64 Bit PCI addressing",
6015                 base_vha->vp_idx);
6016         tgt->tgt_enable_64bit_addr = 1;
6017         /* 3 is reserved */
6018         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6019         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6020         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6021
6022         mutex_lock(&qla_tgt_mutex);
6023         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6024         mutex_unlock(&qla_tgt_mutex);
6025
6026         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6027                 ha->tgt.tgt_ops->add_target(base_vha);
6028
6029         return 0;
6030 }
6031
6032 /* Must be called under tgt_host_action_mutex */
6033 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6034 {
6035         if (!vha->vha_tgt.qla_tgt)
6036                 return 0;
6037
6038         if (vha->fc_vport) {
6039                 qlt_release(vha->vha_tgt.qla_tgt);
6040                 return 0;
6041         }
6042
6043         /* free left over qfull cmds */
6044         qlt_init_term_exchange(vha);
6045
6046         mutex_lock(&qla_tgt_mutex);
6047         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6048         mutex_unlock(&qla_tgt_mutex);
6049
6050         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6051             vha->host_no, ha);
6052         qlt_release(vha->vha_tgt.qla_tgt);
6053
6054         return 0;
6055 }
6056
6057 void qlt_remove_target_resources(struct qla_hw_data *ha)
6058 {
6059         struct scsi_qla_host *node;
6060         u32 key = 0;
6061
6062         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6063                 btree_remove32(&ha->tgt.host_map, key);
6064
6065         btree_destroy32(&ha->tgt.host_map);
6066 }
6067
6068 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6069         unsigned char *b)
6070 {
6071         int i;
6072
6073         pr_debug("qla2xxx HW vha->node_name: ");
6074         for (i = 0; i < WWN_SIZE; i++)
6075                 pr_debug("%02x ", vha->node_name[i]);
6076         pr_debug("\n");
6077         pr_debug("qla2xxx HW vha->port_name: ");
6078         for (i = 0; i < WWN_SIZE; i++)
6079                 pr_debug("%02x ", vha->port_name[i]);
6080         pr_debug("\n");
6081
6082         pr_debug("qla2xxx passed configfs WWPN: ");
6083         put_unaligned_be64(wwpn, b);
6084         for (i = 0; i < WWN_SIZE; i++)
6085                 pr_debug("%02x ", b[i]);
6086         pr_debug("\n");
6087 }
6088
6089 /**
6090  * qla_tgt_lport_register - register lport with external module
6091  *
6092  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6093  * @wwpn: Passwd FC target WWPN
6094  * @callback:  lport initialization callback for tcm_qla2xxx code
6095  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6096  */
6097 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6098                        u64 npiv_wwpn, u64 npiv_wwnn,
6099                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6100 {
6101         struct qla_tgt *tgt;
6102         struct scsi_qla_host *vha;
6103         struct qla_hw_data *ha;
6104         struct Scsi_Host *host;
6105         unsigned long flags;
6106         int rc;
6107         u8 b[WWN_SIZE];
6108
6109         mutex_lock(&qla_tgt_mutex);
6110         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6111                 vha = tgt->vha;
6112                 ha = vha->hw;
6113
6114                 host = vha->host;
6115                 if (!host)
6116                         continue;
6117
6118                 if (!(host->hostt->supported_mode & MODE_TARGET))
6119                         continue;
6120
6121                 spin_lock_irqsave(&ha->hardware_lock, flags);
6122                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6123                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6124                             host->host_no);
6125                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6126                         continue;
6127                 }
6128                 if (tgt->tgt_stop) {
6129                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6130                                  host->host_no);
6131                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6132                         continue;
6133                 }
6134                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6135
6136                 if (!scsi_host_get(host)) {
6137                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6138                             "Unable to scsi_host_get() for"
6139                             " qla2xxx scsi_host\n");
6140                         continue;
6141                 }
6142                 qlt_lport_dump(vha, phys_wwpn, b);
6143
6144                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6145                         scsi_host_put(host);
6146                         continue;
6147                 }
6148                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6149                 if (rc != 0)
6150                         scsi_host_put(host);
6151
6152                 mutex_unlock(&qla_tgt_mutex);
6153                 return rc;
6154         }
6155         mutex_unlock(&qla_tgt_mutex);
6156
6157         return -ENODEV;
6158 }
6159 EXPORT_SYMBOL(qlt_lport_register);
6160
6161 /**
6162  * qla_tgt_lport_deregister - Degister lport
6163  *
6164  * @vha:  Registered scsi_qla_host pointer
6165  */
6166 void qlt_lport_deregister(struct scsi_qla_host *vha)
6167 {
6168         struct qla_hw_data *ha = vha->hw;
6169         struct Scsi_Host *sh = vha->host;
6170         /*
6171          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6172          */
6173         vha->vha_tgt.target_lport_ptr = NULL;
6174         ha->tgt.tgt_ops = NULL;
6175         /*
6176          * Release the Scsi_Host reference for the underlying qla2xxx host
6177          */
6178         scsi_host_put(sh);
6179 }
6180 EXPORT_SYMBOL(qlt_lport_deregister);
6181
6182 /* Must be called under HW lock */
6183 static void qlt_set_mode(struct scsi_qla_host *vha)
6184 {
6185         switch (ql2x_ini_mode) {
6186         case QLA2XXX_INI_MODE_DISABLED:
6187         case QLA2XXX_INI_MODE_EXCLUSIVE:
6188                 vha->host->active_mode = MODE_TARGET;
6189                 break;
6190         case QLA2XXX_INI_MODE_ENABLED:
6191                 vha->host->active_mode = MODE_UNKNOWN;
6192                 break;
6193         case QLA2XXX_INI_MODE_DUAL:
6194                 vha->host->active_mode = MODE_DUAL;
6195                 break;
6196         default:
6197                 break;
6198         }
6199 }
6200
6201 /* Must be called under HW lock */
6202 static void qlt_clear_mode(struct scsi_qla_host *vha)
6203 {
6204         switch (ql2x_ini_mode) {
6205         case QLA2XXX_INI_MODE_DISABLED:
6206                 vha->host->active_mode = MODE_UNKNOWN;
6207                 break;
6208         case QLA2XXX_INI_MODE_EXCLUSIVE:
6209                 vha->host->active_mode = MODE_INITIATOR;
6210                 break;
6211         case QLA2XXX_INI_MODE_ENABLED:
6212         case QLA2XXX_INI_MODE_DUAL:
6213                 vha->host->active_mode = MODE_INITIATOR;
6214                 break;
6215         default:
6216                 break;
6217         }
6218 }
6219
6220 /*
6221  * qla_tgt_enable_vha - NO LOCK HELD
6222  *
6223  * host_reset, bring up w/ Target Mode Enabled
6224  */
6225 void
6226 qlt_enable_vha(struct scsi_qla_host *vha)
6227 {
6228         struct qla_hw_data *ha = vha->hw;
6229         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6230         unsigned long flags;
6231         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6232         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6233
6234         if (!tgt) {
6235                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6236                     "Unable to locate qla_tgt pointer from"
6237                     " struct qla_hw_data\n");
6238                 dump_stack();
6239                 return;
6240         }
6241
6242         spin_lock_irqsave(&ha->hardware_lock, flags);
6243         tgt->tgt_stopped = 0;
6244         qlt_set_mode(vha);
6245         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6246
6247         if (vha->vp_idx) {
6248                 qla24xx_disable_vp(vha);
6249                 qla24xx_enable_vp(vha);
6250         } else {
6251                 if (ha->msix_entries) {
6252                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6253                             "%s: host%ld : vector %d cpu %d\n",
6254                             __func__, vha->host_no,
6255                             ha->msix_entries[rspq_ent].vector,
6256                             ha->msix_entries[rspq_ent].cpuid);
6257
6258                         ha->tgt.rspq_vector_cpuid =
6259                             ha->msix_entries[rspq_ent].cpuid;
6260                 }
6261
6262                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6263                 qla2xxx_wake_dpc(base_vha);
6264                 qla2x00_wait_for_hba_online(base_vha);
6265         }
6266 }
6267 EXPORT_SYMBOL(qlt_enable_vha);
6268
6269 /*
6270  * qla_tgt_disable_vha - NO LOCK HELD
6271  *
6272  * Disable Target Mode and reset the adapter
6273  */
6274 static void qlt_disable_vha(struct scsi_qla_host *vha)
6275 {
6276         struct qla_hw_data *ha = vha->hw;
6277         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6278         unsigned long flags;
6279
6280         if (!tgt) {
6281                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6282                     "Unable to locate qla_tgt pointer from"
6283                     " struct qla_hw_data\n");
6284                 dump_stack();
6285                 return;
6286         }
6287
6288         spin_lock_irqsave(&ha->hardware_lock, flags);
6289         qlt_clear_mode(vha);
6290         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6291
6292         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6293         qla2xxx_wake_dpc(vha);
6294         qla2x00_wait_for_hba_online(vha);
6295 }
6296
6297 /*
6298  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6299  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6300  * members.
6301  */
6302 void
6303 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6304 {
6305         vha->vha_tgt.qla_tgt = NULL;
6306
6307         mutex_init(&vha->vha_tgt.tgt_mutex);
6308         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6309
6310         qlt_clear_mode(vha);
6311
6312         /*
6313          * NOTE: Currently the value is kept the same for <24xx and
6314          * >=24xx ISPs. If it is necessary to change it,
6315          * the check should be added for specific ISPs,
6316          * assigning the value appropriately.
6317          */
6318         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6319
6320         qlt_add_target(ha, vha);
6321 }
6322
6323 void
6324 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6325 {
6326         /*
6327          * FC-4 Feature bit 0 indicates target functionality to the name server.
6328          */
6329         if (qla_tgt_mode_enabled(vha)) {
6330                 ct_req->req.rff_id.fc4_feature = BIT_0;
6331         } else if (qla_ini_mode_enabled(vha)) {
6332                 ct_req->req.rff_id.fc4_feature = BIT_1;
6333         } else if (qla_dual_mode_enabled(vha))
6334                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6335 }
6336
6337 /*
6338  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6339  * @ha: HA context
6340  *
6341  * Beginning of ATIO ring has initialization control block already built
6342  * by nvram config routine.
6343  *
6344  * Returns 0 on success.
6345  */
6346 void
6347 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6348 {
6349         struct qla_hw_data *ha = vha->hw;
6350         uint16_t cnt;
6351         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6352
6353         if (qla_ini_mode_enabled(vha))
6354                 return;
6355
6356         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6357                 pkt->u.raw.signature = ATIO_PROCESSED;
6358                 pkt++;
6359         }
6360
6361 }
6362
6363 /*
6364  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6365  * @ha: SCSI driver HA context
6366  */
6367 void
6368 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6369 {
6370         struct qla_hw_data *ha = vha->hw;
6371         struct atio_from_isp *pkt;
6372         int cnt, i;
6373
6374         if (!ha->flags.fw_started)
6375                 return;
6376
6377         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6378             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6379                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6380                 cnt = pkt->u.raw.entry_count;
6381
6382                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6383                         /*
6384                          * This packet is corrupted. The header + payload
6385                          * can not be trusted. There is no point in passing
6386                          * it further up.
6387                          */
6388                         ql_log(ql_log_warn, vha, 0xffff,
6389                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6390                             pkt->u.isp24.fcp_hdr.s_id,
6391                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6392                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6393
6394                         adjust_corrupted_atio(pkt);
6395                         qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6396                 } else {
6397                         qlt_24xx_atio_pkt_all_vps(vha,
6398                             (struct atio_from_isp *)pkt, ha_locked);
6399                 }
6400
6401                 for (i = 0; i < cnt; i++) {
6402                         ha->tgt.atio_ring_index++;
6403                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6404                                 ha->tgt.atio_ring_index = 0;
6405                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6406                         } else
6407                                 ha->tgt.atio_ring_ptr++;
6408
6409                         pkt->u.raw.signature = ATIO_PROCESSED;
6410                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6411                 }
6412                 wmb();
6413         }
6414
6415         /* Adjust ring index */
6416         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6417         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6418 }
6419
6420 void
6421 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6422 {
6423         struct qla_hw_data *ha = vha->hw;
6424         if (!QLA_TGT_MODE_ENABLED())
6425                 return;
6426
6427         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6428         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6429         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6430
6431         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6432                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6433                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6434
6435                 icb->msix_atio = cpu_to_le16(msix->entry);
6436                 ql_dbg(ql_dbg_init, vha, 0xf072,
6437                     "Registering ICB vector 0x%x for atio que.\n",
6438                     msix->entry);
6439         }
6440 }
6441
6442 void
6443 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6444 {
6445         struct qla_hw_data *ha = vha->hw;
6446         u32 tmp;
6447         u16 t;
6448
6449         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6450                 if (!ha->tgt.saved_set) {
6451                         /* We save only once */
6452                         ha->tgt.saved_exchange_count = nv->exchange_count;
6453                         ha->tgt.saved_firmware_options_1 =
6454                             nv->firmware_options_1;
6455                         ha->tgt.saved_firmware_options_2 =
6456                             nv->firmware_options_2;
6457                         ha->tgt.saved_firmware_options_3 =
6458                             nv->firmware_options_3;
6459                         ha->tgt.saved_set = 1;
6460                 }
6461
6462                 if (qla_tgt_mode_enabled(vha)) {
6463                         nv->exchange_count = cpu_to_le16(0xFFFF);
6464                 } else {                        /* dual */
6465                         if (ql_dm_tgt_ex_pct > 100) {
6466                                 ql_dm_tgt_ex_pct = 50;
6467                         } else if (ql_dm_tgt_ex_pct == 100) {
6468                                 /* leave some for FW */
6469                                 ql_dm_tgt_ex_pct = 95;
6470                         }
6471
6472                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6473                         tmp = tmp/100;
6474                         if (tmp > 0xffff)
6475                                 tmp = 0xffff;
6476
6477                         t = tmp & 0xffff;
6478                         nv->exchange_count = cpu_to_le16(t);
6479                 }
6480
6481                 /* Enable target mode */
6482                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6483
6484                 /* Disable ini mode, if requested */
6485                 if (qla_tgt_mode_enabled(vha))
6486                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6487
6488                 /* Disable Full Login after LIP */
6489                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6490                 /* Enable initial LIP */
6491                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6492                 if (ql2xtgt_tape_enable)
6493                         /* Enable FC Tape support */
6494                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6495                 else
6496                         /* Disable FC Tape support */
6497                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6498
6499                 /* Disable Full Login after LIP */
6500                 nv->host_p &= cpu_to_le32(~BIT_10);
6501
6502                 /*
6503                  * clear BIT 15 explicitly as we have seen at least
6504                  * a couple of instances where this was set and this
6505                  * was causing the firmware to not be initialized.
6506                  */
6507                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6508                 /* Enable target PRLI control */
6509                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6510         } else {
6511                 if (ha->tgt.saved_set) {
6512                         nv->exchange_count = ha->tgt.saved_exchange_count;
6513                         nv->firmware_options_1 =
6514                             ha->tgt.saved_firmware_options_1;
6515                         nv->firmware_options_2 =
6516                             ha->tgt.saved_firmware_options_2;
6517                         nv->firmware_options_3 =
6518                             ha->tgt.saved_firmware_options_3;
6519                 }
6520                 return;
6521         }
6522
6523         if (ha->tgt.enable_class_2) {
6524                 if (vha->flags.init_done)
6525                         fc_host_supported_classes(vha->host) =
6526                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6527
6528                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6529         } else {
6530                 if (vha->flags.init_done)
6531                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6532
6533                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6534         }
6535 }
6536
6537 void
6538 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6539         struct init_cb_24xx *icb)
6540 {
6541         struct qla_hw_data *ha = vha->hw;
6542
6543         if (!QLA_TGT_MODE_ENABLED())
6544                 return;
6545
6546         if (ha->tgt.node_name_set) {
6547                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6548                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6549         }
6550
6551         /* disable ZIO at start time. */
6552         if (!vha->flags.init_done) {
6553                 uint32_t tmp;
6554                 tmp = le32_to_cpu(icb->firmware_options_2);
6555                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6556                 icb->firmware_options_2 = cpu_to_le32(tmp);
6557         }
6558 }
6559
6560 void
6561 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6562 {
6563         struct qla_hw_data *ha = vha->hw;
6564         u32 tmp;
6565         u16 t;
6566
6567         if (!QLA_TGT_MODE_ENABLED())
6568                 return;
6569
6570         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6571                 if (!ha->tgt.saved_set) {
6572                         /* We save only once */
6573                         ha->tgt.saved_exchange_count = nv->exchange_count;
6574                         ha->tgt.saved_firmware_options_1 =
6575                             nv->firmware_options_1;
6576                         ha->tgt.saved_firmware_options_2 =
6577                             nv->firmware_options_2;
6578                         ha->tgt.saved_firmware_options_3 =
6579                             nv->firmware_options_3;
6580                         ha->tgt.saved_set = 1;
6581                 }
6582
6583                 if (qla_tgt_mode_enabled(vha)) {
6584                         nv->exchange_count = cpu_to_le16(0xFFFF);
6585                 } else {                        /* dual */
6586                         if (ql_dm_tgt_ex_pct > 100) {
6587                                 ql_dm_tgt_ex_pct = 50;
6588                         } else if (ql_dm_tgt_ex_pct == 100) {
6589                                 /* leave some for FW */
6590                                 ql_dm_tgt_ex_pct = 95;
6591                         }
6592
6593                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6594                         tmp = tmp/100;
6595                         if (tmp > 0xffff)
6596                                 tmp = 0xffff;
6597                         t = tmp & 0xffff;
6598                         nv->exchange_count = cpu_to_le16(t);
6599                 }
6600
6601                 /* Enable target mode */
6602                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6603
6604                 /* Disable ini mode, if requested */
6605                 if (qla_tgt_mode_enabled(vha))
6606                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6607                 /* Disable Full Login after LIP */
6608                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6609                 /* Enable initial LIP */
6610                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6611                 /*
6612                  * clear BIT 15 explicitly as we have seen at
6613                  * least a couple of instances where this was set
6614                  * and this was causing the firmware to not be
6615                  * initialized.
6616                  */
6617                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6618                 if (ql2xtgt_tape_enable)
6619                         /* Enable FC tape support */
6620                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6621                 else
6622                         /* Disable FC tape support */
6623                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6624
6625                 /* Disable Full Login after LIP */
6626                 nv->host_p &= cpu_to_le32(~BIT_10);
6627                 /* Enable target PRLI control */
6628                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6629         } else {
6630                 if (ha->tgt.saved_set) {
6631                         nv->exchange_count = ha->tgt.saved_exchange_count;
6632                         nv->firmware_options_1 =
6633                             ha->tgt.saved_firmware_options_1;
6634                         nv->firmware_options_2 =
6635                             ha->tgt.saved_firmware_options_2;
6636                         nv->firmware_options_3 =
6637                             ha->tgt.saved_firmware_options_3;
6638                 }
6639                 return;
6640         }
6641
6642         if (ha->tgt.enable_class_2) {
6643                 if (vha->flags.init_done)
6644                         fc_host_supported_classes(vha->host) =
6645                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6646
6647                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6648         } else {
6649                 if (vha->flags.init_done)
6650                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6651
6652                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6653         }
6654 }
6655
6656 void
6657 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6658         struct init_cb_81xx *icb)
6659 {
6660         struct qla_hw_data *ha = vha->hw;
6661
6662         if (!QLA_TGT_MODE_ENABLED())
6663                 return;
6664
6665         if (ha->tgt.node_name_set) {
6666                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6667                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6668         }
6669
6670         /* disable ZIO at start time. */
6671         if (!vha->flags.init_done) {
6672                 uint32_t tmp;
6673                 tmp = le32_to_cpu(icb->firmware_options_2);
6674                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6675                 icb->firmware_options_2 = cpu_to_le32(tmp);
6676         }
6677
6678 }
6679
6680 void
6681 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6682 {
6683         if (!QLA_TGT_MODE_ENABLED())
6684                 return;
6685
6686         ha->msix_count += 1; /* For ATIO Q */
6687 }
6688
6689 int
6690 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6691         struct sts_entry_24xx *pkt)
6692 {
6693         switch (pkt->entry_type) {
6694         case ABTS_RECV_24XX:
6695         case ABTS_RESP_24XX:
6696         case CTIO_TYPE7:
6697         case NOTIFY_ACK_TYPE:
6698         case CTIO_CRC2:
6699                 return 1;
6700         default:
6701                 return 0;
6702         }
6703 }
6704
6705 void
6706 qlt_modify_vp_config(struct scsi_qla_host *vha,
6707         struct vp_config_entry_24xx *vpmod)
6708 {
6709         /* enable target mode.  Bit5 = 1 => disable */
6710         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6711                 vpmod->options_idx1 &= ~BIT_5;
6712
6713         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6714         if (qla_tgt_mode_enabled(vha))
6715                 vpmod->options_idx1 &= ~BIT_4;
6716 }
6717
6718 void
6719 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6720 {
6721         int rc;
6722
6723         if (!QLA_TGT_MODE_ENABLED())
6724                 return;
6725
6726         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6727                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6728                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6729         } else {
6730                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6731                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6732         }
6733
6734         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6735         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6736
6737         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6738         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6739             qlt_unknown_atio_work_fn);
6740
6741         qlt_clear_mode(base_vha);
6742
6743         rc = btree_init32(&ha->tgt.host_map);
6744         if (rc)
6745                 ql_log(ql_log_info, base_vha, 0xffff,
6746                     "Unable to initialize ha->host_map btree\n");
6747
6748         qlt_update_vp_map(base_vha, SET_VP_IDX);
6749 }
6750
6751 irqreturn_t
6752 qla83xx_msix_atio_q(int irq, void *dev_id)
6753 {
6754         struct rsp_que *rsp;
6755         scsi_qla_host_t *vha;
6756         struct qla_hw_data *ha;
6757         unsigned long flags;
6758
6759         rsp = (struct rsp_que *) dev_id;
6760         ha = rsp->hw;
6761         vha = pci_get_drvdata(ha->pdev);
6762
6763         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6764
6765         qlt_24xx_process_atio_queue(vha, 0);
6766
6767         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6768
6769         return IRQ_HANDLED;
6770 }
6771
6772 static void
6773 qlt_handle_abts_recv_work(struct work_struct *work)
6774 {
6775         struct qla_tgt_sess_op *op = container_of(work,
6776                 struct qla_tgt_sess_op, work);
6777         scsi_qla_host_t *vha = op->vha;
6778         struct qla_hw_data *ha = vha->hw;
6779         unsigned long flags;
6780
6781         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6782                 return;
6783
6784         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6785         qlt_24xx_process_atio_queue(vha, 0);
6786         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6787
6788         spin_lock_irqsave(&ha->hardware_lock, flags);
6789         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6790         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6791
6792         kfree(op);
6793 }
6794
6795 void
6796 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6797 {
6798         struct qla_tgt_sess_op *op;
6799
6800         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6801
6802         if (!op) {
6803                 /* do not reach for ATIO queue here.  This is best effort err
6804                  * recovery at this point.
6805                  */
6806                 qlt_response_pkt_all_vps(vha, pkt);
6807                 return;
6808         }
6809
6810         memcpy(&op->atio, pkt, sizeof(*pkt));
6811         op->vha = vha;
6812         op->chip_reset = vha->hw->chip_reset;
6813         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6814         queue_work(qla_tgt_wq, &op->work);
6815         return;
6816 }
6817
6818 int
6819 qlt_mem_alloc(struct qla_hw_data *ha)
6820 {
6821         if (!QLA_TGT_MODE_ENABLED())
6822                 return 0;
6823
6824         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6825             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6826         if (!ha->tgt.tgt_vp_map)
6827                 return -ENOMEM;
6828
6829         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6830             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6831             &ha->tgt.atio_dma, GFP_KERNEL);
6832         if (!ha->tgt.atio_ring) {
6833                 kfree(ha->tgt.tgt_vp_map);
6834                 return -ENOMEM;
6835         }
6836         return 0;
6837 }
6838
6839 void
6840 qlt_mem_free(struct qla_hw_data *ha)
6841 {
6842         if (!QLA_TGT_MODE_ENABLED())
6843                 return;
6844
6845         if (ha->tgt.atio_ring) {
6846                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6847                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6848                     ha->tgt.atio_dma);
6849         }
6850         kfree(ha->tgt.tgt_vp_map);
6851 }
6852
6853 /* vport_slock to be held by the caller */
6854 void
6855 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6856 {
6857         void *slot;
6858         u32 key;
6859         int rc;
6860
6861         if (!QLA_TGT_MODE_ENABLED())
6862                 return;
6863
6864         key = vha->d_id.b24;
6865
6866         switch (cmd) {
6867         case SET_VP_IDX:
6868                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6869                 break;
6870         case SET_AL_PA:
6871                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6872                 if (!slot) {
6873                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6874                             "Save vha in host_map %p %06x\n", vha, key);
6875                         rc = btree_insert32(&vha->hw->tgt.host_map,
6876                                 key, vha, GFP_ATOMIC);
6877                         if (rc)
6878                                 ql_log(ql_log_info, vha, 0xffff,
6879                                     "Unable to insert s_id into host_map: %06x\n",
6880                                     key);
6881                         return;
6882                 }
6883                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6884                         "replace existing vha in host_map %p %06x\n", vha, key);
6885                 btree_update32(&vha->hw->tgt.host_map, key, vha);
6886                 break;
6887         case RESET_VP_IDX:
6888                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6889                 break;
6890         case RESET_AL_PA:
6891                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6892                    "clear vha in host_map %p %06x\n", vha, key);
6893                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6894                 if (slot)
6895                         btree_remove32(&vha->hw->tgt.host_map, key);
6896                 vha->d_id.b24 = 0;
6897                 break;
6898         }
6899 }
6900
6901 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
6902 {
6903         unsigned long flags;
6904         struct qla_hw_data *ha = vha->hw;
6905
6906         if (!vha->d_id.b24) {
6907                 spin_lock_irqsave(&ha->vport_slock, flags);
6908                 vha->d_id = id;
6909                 qlt_update_vp_map(vha, SET_AL_PA);
6910                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6911         } else if (vha->d_id.b24 != id.b24) {
6912                 spin_lock_irqsave(&ha->vport_slock, flags);
6913                 qlt_update_vp_map(vha, RESET_AL_PA);
6914                 vha->d_id = id;
6915                 qlt_update_vp_map(vha, SET_AL_PA);
6916                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6917         }
6918 }
6919
6920 static int __init qlt_parse_ini_mode(void)
6921 {
6922         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6923                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6924         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6925                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6926         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6927                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6928         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
6929                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
6930         else
6931                 return false;
6932
6933         return true;
6934 }
6935
6936 int __init qlt_init(void)
6937 {
6938         int ret;
6939
6940         if (!qlt_parse_ini_mode()) {
6941                 ql_log(ql_log_fatal, NULL, 0xe06b,
6942                     "qlt_parse_ini_mode() failed\n");
6943                 return -EINVAL;
6944         }
6945
6946         if (!QLA_TGT_MODE_ENABLED())
6947                 return 0;
6948
6949         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6950             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6951             qla_tgt_mgmt_cmd), 0, NULL);
6952         if (!qla_tgt_mgmt_cmd_cachep) {
6953                 ql_log(ql_log_fatal, NULL, 0xe06d,
6954                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6955                 return -ENOMEM;
6956         }
6957
6958         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6959             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
6960             0, NULL);
6961
6962         if (!qla_tgt_plogi_cachep) {
6963                 ql_log(ql_log_fatal, NULL, 0xe06d,
6964                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6965                 ret = -ENOMEM;
6966                 goto out_mgmt_cmd_cachep;
6967         }
6968
6969         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6970             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6971         if (!qla_tgt_mgmt_cmd_mempool) {
6972                 ql_log(ql_log_fatal, NULL, 0xe06e,
6973                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6974                 ret = -ENOMEM;
6975                 goto out_plogi_cachep;
6976         }
6977
6978         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6979         if (!qla_tgt_wq) {
6980                 ql_log(ql_log_fatal, NULL, 0xe06f,
6981                     "alloc_workqueue for qla_tgt_wq failed\n");
6982                 ret = -ENOMEM;
6983                 goto out_cmd_mempool;
6984         }
6985         /*
6986          * Return 1 to signal that initiator-mode is being disabled
6987          */
6988         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6989
6990 out_cmd_mempool:
6991         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6992 out_plogi_cachep:
6993         kmem_cache_destroy(qla_tgt_plogi_cachep);
6994 out_mgmt_cmd_cachep:
6995         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6996         return ret;
6997 }
6998
6999 void qlt_exit(void)
7000 {
7001         if (!QLA_TGT_MODE_ENABLED())
7002                 return;
7003
7004         destroy_workqueue(qla_tgt_wq);
7005         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7006         kmem_cache_destroy(qla_tgt_plogi_cachep);
7007         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7008 }