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         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 /*
 117  * Global Variables
 118  */
 119 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 120 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 121 static struct workqueue_struct *qla_tgt_wq;
 122 static DEFINE_MUTEX(qla_tgt_mutex);
 123 static LIST_HEAD(qla_tgt_glist);
 124
 125 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 126 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 127         struct qla_tgt *tgt,
 128         const uint8_t *port_name)
 129 {
 130         struct qla_tgt_sess *sess;
 131
 132         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 133                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 134                         return sess;
 135         }
 136
 137         return NULL;
 138 }
 139
 140 /* Might release hw lock, then reaquire!! */
 141 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 142 {
 143         /* Send marker if required */
 144         if (unlikely(vha->marker_needed != 0)) {
 145                 int rc = qla2x00_issue_marker(vha, vha_locked);
 146                 if (rc != QLA_SUCCESS) {
 147                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 148                             "qla_target(%d): issue_marker() failed\n",
 149                             vha->vp_idx);
 150                 }
 151                 return rc;
 152         }
 153         return QLA_SUCCESS;
 154 }
 155
 156 static inline
 157 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 158         uint8_t *d_id)
 159 {
 160         struct qla_hw_data *ha = vha->hw;
 161         uint8_t vp_idx;
 162
 163         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 164                 return NULL;
 165
 166         if (vha->d_id.b.al_pa == d_id[2])
 167                 return vha;
 168
 169         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 170         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 171         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 172                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 173
 174         return NULL;
 175 }
 176
 177 static inline
 178 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 179         uint16_t vp_idx)
 180 {
 181         struct qla_hw_data *ha = vha->hw;
 182
 183         if (vha->vp_idx == vp_idx)
 184                 return vha;
 185
 186         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 187         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 188                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 189
 190         return NULL;
 191 }
 192
 193 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 194 {
 195         unsigned long flags;
 196
 197         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 198
 199         vha->hw->tgt.num_pend_cmds++;
 200         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 201                 vha->hw->qla_stats.stat_max_pend_cmds =
 202                         vha->hw->tgt.num_pend_cmds;
 203         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 204 }
 205 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 206 {
 207         unsigned long flags;
 208
 209         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 210         vha->hw->tgt.num_pend_cmds--;
 211         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 212 }
 213
 214 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 215         struct atio_from_isp *atio)
 216 {
 217         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 218                 "%s: qla_target(%d): type %x ox_id %04x\n",
 219                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 220                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 221
 222         switch (atio->u.raw.entry_type) {
 223         case ATIO_TYPE7:
 224         {
 225                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 226                     atio->u.isp24.fcp_hdr.d_id);
 227                 if (unlikely(NULL == host)) {
 228                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 229                             "qla_target(%d): Received ATIO_TYPE7 "
 230                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 231                             atio->u.isp24.fcp_hdr.d_id[0],
 232                             atio->u.isp24.fcp_hdr.d_id[1],
 233                             atio->u.isp24.fcp_hdr.d_id[2]);
 234                         break;
 235                 }
 236                 qlt_24xx_atio_pkt(host, atio);
 237                 break;
 238         }
 239
 240         case IMMED_NOTIFY_TYPE:
 241         {
 242                 struct scsi_qla_host *host = vha;
 243                 struct imm_ntfy_from_isp *entry =
 244                     (struct imm_ntfy_from_isp *)atio;
 245
 246                 if ((entry->u.isp24.vp_index != 0xFF) &&
 247                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 248                         host = qlt_find_host_by_vp_idx(vha,
 249                             entry->u.isp24.vp_index);
 250                         if (unlikely(!host)) {
 251                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 252                                     "qla_target(%d): Received "
 253                                     "ATIO (IMMED_NOTIFY_TYPE) "
 254                                     "with unknown vp_index %d\n",
 255                                     vha->vp_idx, entry->u.isp24.vp_index);
 256                                 break;
 257                         }
 258                 }
 259                 qlt_24xx_atio_pkt(host, atio);
 260                 break;
 261         }
 262
 263         default:
 264                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 265                     "qla_target(%d): Received unknown ATIO atio "
 266                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 267                 break;
 268         }
 269
 270         return;
 271 }
 272
 273 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 274 {
 275         switch (pkt->entry_type) {
 276         case CTIO_CRC2:
 277                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 278                         "qla_target(%d):%s: CRC2 Response pkt\n",
 279                         vha->vp_idx, __func__);
 280         case CTIO_TYPE7:
 281         {
 282                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 283                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 284                     entry->vp_index);
 285                 if (unlikely(!host)) {
 286                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 287                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 288                             "received, with unknown vp_index %d\n",
 289                             vha->vp_idx, entry->vp_index);
 290                         break;
 291                 }
 292                 qlt_response_pkt(host, pkt);
 293                 break;
 294         }
 295
 296         case IMMED_NOTIFY_TYPE:
 297         {
 298                 struct scsi_qla_host *host = vha;
 299                 struct imm_ntfy_from_isp *entry =
 300                     (struct imm_ntfy_from_isp *)pkt;
 301
 302                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 303                 if (unlikely(!host)) {
 304                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 305                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 306                             "received, with unknown vp_index %d\n",
 307                             vha->vp_idx, entry->u.isp24.vp_index);
 308                         break;
 309                 }
 310                 qlt_response_pkt(host, pkt);
 311                 break;
 312         }
 313
 314         case NOTIFY_ACK_TYPE:
 315         {
 316                 struct scsi_qla_host *host = vha;
 317                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 318
 319                 if (0xFF != entry->u.isp24.vp_index) {
 320                         host = qlt_find_host_by_vp_idx(vha,
 321                             entry->u.isp24.vp_index);
 322                         if (unlikely(!host)) {
 323                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 324                                     "qla_target(%d): Response "
 325                                     "pkt (NOTIFY_ACK_TYPE) "
 326                                     "received, with unknown "
 327                                     "vp_index %d\n", vha->vp_idx,
 328                                     entry->u.isp24.vp_index);
 329                                 break;
 330                         }
 331                 }
 332                 qlt_response_pkt(host, pkt);
 333                 break;
 334         }
 335
 336         case ABTS_RECV_24XX:
 337         {
 338                 struct abts_recv_from_24xx *entry =
 339                     (struct abts_recv_from_24xx *)pkt;
 340                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 341                     entry->vp_index);
 342                 if (unlikely(!host)) {
 343                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 344                             "qla_target(%d): Response pkt "
 345                             "(ABTS_RECV_24XX) received, with unknown "
 346                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 347                         break;
 348                 }
 349                 qlt_response_pkt(host, pkt);
 350                 break;
 351         }
 352
 353         case ABTS_RESP_24XX:
 354         {
 355                 struct abts_resp_to_24xx *entry =
 356                     (struct abts_resp_to_24xx *)pkt;
 357                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 358                     entry->vp_index);
 359                 if (unlikely(!host)) {
 360                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 361                             "qla_target(%d): Response pkt "
 362                             "(ABTS_RECV_24XX) received, with unknown "
 363                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 364                         break;
 365                 }
 366                 qlt_response_pkt(host, pkt);
 367                 break;
 368         }
 369
 370         default:
 371                 qlt_response_pkt(vha, pkt);
 372                 break;
 373         }
 374
 375 }
 376
 377 static void qlt_free_session_done(struct work_struct *work)
 378 {
 379         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 380             free_work);
 381         struct qla_tgt *tgt = sess->tgt;
 382         struct scsi_qla_host *vha = sess->vha;
 383         struct qla_hw_data *ha = vha->hw;
 384
 385         BUG_ON(!tgt);
 386         /*
 387          * Release the target session for FC Nexus from fabric module code.
 388          */
 389         if (sess->se_sess != NULL)
 390                 ha->tgt.tgt_ops->free_session(sess);
 391
 392         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 393             "Unregistration of sess %p finished\n", sess);
 394
 395         kfree(sess);
 396         /*
 397          * We need to protect against race, when tgt is freed before or
 398          * inside wake_up()
 399          */
 400         tgt->sess_count--;
 401         if (tgt->sess_count == 0)
 402                 wake_up_all(&tgt->waitQ);
 403 }
 404
 405 /* ha->hardware_lock supposed to be held on entry */
 406 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 407 {
 408         struct scsi_qla_host *vha = sess->vha;
 409
 410         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 411
 412         list_del(&sess->sess_list_entry);
 413         if (sess->deleted)
 414                 list_del(&sess->del_list_entry);
 415
 416         INIT_WORK(&sess->free_work, qlt_free_session_done);
 417         schedule_work(&sess->free_work);
 418 }
 419 EXPORT_SYMBOL(qlt_unreg_sess);
 420
 421 /* ha->hardware_lock supposed to be held on entry */
 422 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 423 {
 424         struct qla_hw_data *ha = vha->hw;
 425         struct qla_tgt_sess *sess = NULL;
 426         uint32_t unpacked_lun, lun = 0;
 427         uint16_t loop_id;
 428         int res = 0;
 429         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 430         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 431
 432         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 433         if (loop_id == 0xFFFF) {
 434 #if 0 /* FIXME: Re-enable Global event handling.. */
 435                 /* Global event */
 436                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 437                 qlt_clear_tgt_db(ha->tgt.qla_tgt);
 438                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 439                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 440                             typeof(*sess), sess_list_entry);
 441                         switch (mcmd) {
 442                         case QLA_TGT_NEXUS_LOSS_SESS:
 443                                 mcmd = QLA_TGT_NEXUS_LOSS;
 444                                 break;
 445                         case QLA_TGT_ABORT_ALL_SESS:
 446                                 mcmd = QLA_TGT_ABORT_ALL;
 447                                 break;
 448                         case QLA_TGT_NEXUS_LOSS:
 449                         case QLA_TGT_ABORT_ALL:
 450                                 break;
 451                         default:
 452                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 453                                     "qla_target(%d): Not allowed "
 454                                     "command %x in %s", vha->vp_idx,
 455                                     mcmd, __func__);
 456                                 sess = NULL;
 457                                 break;
 458                         }
 459                 } else
 460                         sess = NULL;
 461 #endif
 462         } else {
 463                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 464         }
 465
 466         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 467             "Using sess for qla_tgt_reset: %p\n", sess);
 468         if (!sess) {
 469                 res = -ESRCH;
 470                 return res;
 471         }
 472
 473         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 474             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 475             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 476             mcmd, loop_id);
 477
 478         lun = a->u.isp24.fcp_cmnd.lun;
 479         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 480
 481         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 482             iocb, QLA24XX_MGMT_SEND_NACK);
 483 }
 484
 485 /* ha->hardware_lock supposed to be held on entry */
 486 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 487         bool immediate)
 488 {
 489         struct qla_tgt *tgt = sess->tgt;
 490         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 491
 492         if (sess->deleted)
 493                 return;
 494
 495         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 496             "Scheduling sess %p for deletion\n", sess);
 497         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 498         sess->deleted = 1;
 499
 500         if (immediate)
 501                 dev_loss_tmo = 0;
 502
 503         sess->expires = jiffies + dev_loss_tmo * HZ;
 504
 505         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 506             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 507             "deletion in %u secs (expires: %lu) immed: %d\n",
 508             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 509             sess->expires, immediate);
 510
 511         if (immediate)
 512                 schedule_delayed_work(&tgt->sess_del_work, 0);
 513         else
 514                 schedule_delayed_work(&tgt->sess_del_work,
 515                     sess->expires - jiffies);
 516 }
 517
 518 /* ha->hardware_lock supposed to be held on entry */
 519 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 520 {
 521         struct qla_tgt_sess *sess;
 522
 523         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 524                 qlt_schedule_sess_for_deletion(sess, true);
 525
 526         /* At this point tgt could be already dead */
 527 }
 528
 529 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 530         uint16_t *loop_id)
 531 {
 532         struct qla_hw_data *ha = vha->hw;
 533         dma_addr_t gid_list_dma;
 534         struct gid_list_info *gid_list;
 535         char *id_iter;
 536         int res, rc, i;
 537         uint16_t entries;
 538
 539         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 540             &gid_list_dma, GFP_KERNEL);
 541         if (!gid_list) {
 542                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 543                     "qla_target(%d): DMA Alloc failed of %u\n",
 544                     vha->vp_idx, qla2x00_gid_list_size(ha));
 545                 return -ENOMEM;
 546         }
 547
 548         /* Get list of logged in devices */
 549         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 550         if (rc != QLA_SUCCESS) {
 551                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 552                     "qla_target(%d): get_id_list() failed: %x\n",
 553                     vha->vp_idx, rc);
 554                 res = -1;
 555                 goto out_free_id_list;
 556         }
 557
 558         id_iter = (char *)gid_list;
 559         res = -1;
 560         for (i = 0; i < entries; i++) {
 561                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 562                 if ((gid->al_pa == s_id[2]) &&
 563                     (gid->area == s_id[1]) &&
 564                     (gid->domain == s_id[0])) {
 565                         *loop_id = le16_to_cpu(gid->loop_id);
 566                         res = 0;
 567                         break;
 568                 }
 569                 id_iter += ha->gid_list_info_size;
 570         }
 571
 572 out_free_id_list:
 573         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 574             gid_list, gid_list_dma);
 575         return res;
 576 }
 577
 578 /* ha->hardware_lock supposed to be held on entry */
 579 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 580 {
 581         BUG_ON(!sess->deleted);
 582
 583         list_del(&sess->del_list_entry);
 584         sess->deleted = 0;
 585 }
 586
 587 static void qlt_del_sess_work_fn(struct delayed_work *work)
 588 {
 589         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 590             sess_del_work);
 591         struct scsi_qla_host *vha = tgt->vha;
 592         struct qla_hw_data *ha = vha->hw;
 593         struct qla_tgt_sess *sess;
 594         unsigned long flags, elapsed;
 595
 596         spin_lock_irqsave(&ha->hardware_lock, flags);
 597         while (!list_empty(&tgt->del_sess_list)) {
 598                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 599                     del_list_entry);
 600                 elapsed = jiffies;
 601                 if (time_after_eq(elapsed, sess->expires)) {
 602                         qlt_undelete_sess(sess);
 603
 604                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 605                             "Timeout: sess %p about to be deleted\n",
 606                             sess);
 607                         ha->tgt.tgt_ops->shutdown_sess(sess);
 608                         ha->tgt.tgt_ops->put_sess(sess);
 609                 } else {
 610                         schedule_delayed_work(&tgt->sess_del_work,
 611                             sess->expires - elapsed);
 612                         break;
 613                 }
 614         }
 615         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 616 }
 617
 618 /*
 619  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 620  * Caller must put it.
 621  */
 622 static struct qla_tgt_sess *qlt_create_sess(
 623         struct scsi_qla_host *vha,
 624         fc_port_t *fcport,
 625         bool local)
 626 {
 627         struct qla_hw_data *ha = vha->hw;
 628         struct qla_tgt_sess *sess;
 629         unsigned long flags;
 630         unsigned char be_sid[3];
 631
 632         /* Check to avoid double sessions */
 633         spin_lock_irqsave(&ha->hardware_lock, flags);
 634         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 635                                 sess_list_entry) {
 636                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 637                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 638                             "Double sess %p found (s_id %x:%x:%x, "
 639                             "loop_id %d), updating to d_id %x:%x:%x, "
 640                             "loop_id %d", sess, sess->s_id.b.domain,
 641                             sess->s_id.b.al_pa, sess->s_id.b.area,
 642                             sess->loop_id, fcport->d_id.b.domain,
 643                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 644                             fcport->loop_id);
 645
 646                         if (sess->deleted)
 647                                 qlt_undelete_sess(sess);
 648
 649                         kref_get(&sess->se_sess->sess_kref);
 650                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 651                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 652
 653                         if (sess->local && !local)
 654                                 sess->local = 0;
 655                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 656
 657                         return sess;
 658                 }
 659         }
 660         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 661
 662         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 663         if (!sess) {
 664                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 665                     "qla_target(%u): session allocation failed, all commands "
 666                     "from port %8phC will be refused", vha->vp_idx,
 667                     fcport->port_name);
 668
 669                 return NULL;
 670         }
 671         sess->tgt = vha->vha_tgt.qla_tgt;
 672         sess->vha = vha;
 673         sess->s_id = fcport->d_id;
 674         sess->loop_id = fcport->loop_id;
 675         sess->local = local;
 676
 677         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 678             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 679             sess, vha->vha_tgt.qla_tgt);
 680
 681         be_sid[0] = sess->s_id.b.domain;
 682         be_sid[1] = sess->s_id.b.area;
 683         be_sid[2] = sess->s_id.b.al_pa;
 684         /*
 685          * Determine if this fc_port->port_name is allowed to access
 686          * target mode using explict NodeACLs+MappedLUNs, or using
 687          * TPG demo mode.  If this is successful a target mode FC nexus
 688          * is created.
 689          */
 690         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 691             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 692                 kfree(sess);
 693                 return NULL;
 694         }
 695         /*
 696          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 697          * access across ->hardware_lock reaquire.
 698          */
 699         kref_get(&sess->se_sess->sess_kref);
 700
 701         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 702         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 703         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 704
 705         spin_lock_irqsave(&ha->hardware_lock, flags);
 706         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 707         vha->vha_tgt.qla_tgt->sess_count++;
 708         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 709
 710         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 711             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 712             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 713             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 714             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 715             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 716
 717         return sess;
 718 }
 719
 720 /*
 721  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 722  */
 723 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 724 {
 725         struct qla_hw_data *ha = vha->hw;
 726         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 727         struct qla_tgt_sess *sess;
 728         unsigned long flags;
 729
 730         if (!vha->hw->tgt.tgt_ops)
 731                 return;
 732
 733         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 734                 return;
 735
 736         if (qla_ini_mode_enabled(vha))
 737                 return;
 738
 739         spin_lock_irqsave(&ha->hardware_lock, flags);
 740         if (tgt->tgt_stop) {
 741                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 742                 return;
 743         }
 744         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 745         if (!sess) {
 746                 spin_unlock_irqrestore(&ha->hardware_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->hardware_lock, flags);
 753         } else {
 754                 kref_get(&sess->se_sess->sess_kref);
 755
 756                 if (sess->deleted) {
 757                         qlt_undelete_sess(sess);
 758
 759                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 760                             "qla_target(%u): %ssession for port %8phC "
 761                             "(loop ID %d) reappeared\n", vha->vp_idx,
 762                             sess->local ? "local " : "", sess->port_name,
 763                             sess->loop_id);
 764
 765                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 766                             "Reappeared sess %p\n", sess);
 767                 }
 768                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 769                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 770         }
 771
 772         if (sess && sess->local) {
 773                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 774                     "qla_target(%u): local session for "
 775                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 776                     fcport->port_name, sess->loop_id);
 777                 sess->local = 0;
 778         }
 779         ha->tgt.tgt_ops->put_sess(sess);
 780         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 781 }
 782
 783 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 784 {
 785         struct qla_hw_data *ha = vha->hw;
 786         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 787         struct qla_tgt_sess *sess;
 788         unsigned long flags;
 789
 790         if (!vha->hw->tgt.tgt_ops)
 791                 return;
 792
 793         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 794                 return;
 795
 796         spin_lock_irqsave(&ha->hardware_lock, flags);
 797         if (tgt->tgt_stop) {
 798                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 799                 return;
 800         }
 801         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 802         if (!sess) {
 803                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 804                 return;
 805         }
 806
 807         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 808
 809         sess->local = 1;
 810         qlt_schedule_sess_for_deletion(sess, false);
 811         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 812 }
 813
 814 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 815 {
 816         struct qla_hw_data *ha = tgt->ha;
 817         unsigned long flags;
 818         int res;
 819         /*
 820          * We need to protect against race, when tgt is freed before or
 821          * inside wake_up()
 822          */
 823         spin_lock_irqsave(&ha->hardware_lock, flags);
 824         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 825             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 826             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 827         res = (tgt->sess_count == 0);
 828         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 829
 830         return res;
 831 }
 832
 833 /* Called by tcm_qla2xxx configfs code */
 834 int qlt_stop_phase1(struct qla_tgt *tgt)
 835 {
 836         struct scsi_qla_host *vha = tgt->vha;
 837         struct qla_hw_data *ha = tgt->ha;
 838         unsigned long flags;
 839
 840         mutex_lock(&qla_tgt_mutex);
 841         if (!vha->fc_vport) {
 842                 struct Scsi_Host *sh = vha->host;
 843                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 844                 bool npiv_vports;
 845
 846                 spin_lock_irqsave(sh->host_lock, flags);
 847                 npiv_vports = (fc_host->npiv_vports_inuse);
 848                 spin_unlock_irqrestore(sh->host_lock, flags);
 849
 850                 if (npiv_vports) {
 851                         mutex_unlock(&qla_tgt_mutex);
 852                         return -EPERM;
 853                 }
 854         }
 855         if (tgt->tgt_stop || tgt->tgt_stopped) {
 856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 857                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 858                 mutex_unlock(&qla_tgt_mutex);
 859                 return -EPERM;
 860         }
 861
 862         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 863             vha->host_no, vha);
 864         /*
 865          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 866          * Lock is needed, because we still can get an incoming packet.
 867          */
 868         mutex_lock(&vha->vha_tgt.tgt_mutex);
 869         spin_lock_irqsave(&ha->hardware_lock, flags);
 870         tgt->tgt_stop = 1;
 871         qlt_clear_tgt_db(tgt);
 872         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 873         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 874         mutex_unlock(&qla_tgt_mutex);
 875
 876         flush_delayed_work(&tgt->sess_del_work);
 877
 878         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 879             "Waiting for sess works (tgt %p)", tgt);
 880         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 881         while (!list_empty(&tgt->sess_works_list)) {
 882                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 883                 flush_scheduled_work();
 884                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 885         }
 886         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 887
 888         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 889             "Waiting for tgt %p: list_empty(sess_list)=%d "
 890             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 891             tgt->sess_count);
 892
 893         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 894
 895         /* Big hammer */
 896         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 897                 qlt_disable_vha(vha);
 898
 899         /* Wait for sessions to clear out (just in case) */
 900         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 901         return 0;
 902 }
 903 EXPORT_SYMBOL(qlt_stop_phase1);
 904
 905 /* Called by tcm_qla2xxx configfs code */
 906 void qlt_stop_phase2(struct qla_tgt *tgt)
 907 {
 908         struct qla_hw_data *ha = tgt->ha;
 909         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 910         unsigned long flags;
 911
 912         if (tgt->tgt_stopped) {
 913                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 914                     "Already in tgt->tgt_stopped state\n");
 915                 dump_stack();
 916                 return;
 917         }
 918
 919         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 920             "Waiting for %d IRQ commands to complete (tgt %p)",
 921             tgt->irq_cmd_count, tgt);
 922
 923         mutex_lock(&vha->vha_tgt.tgt_mutex);
 924         spin_lock_irqsave(&ha->hardware_lock, flags);
 925         while (tgt->irq_cmd_count != 0) {
 926                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 927                 udelay(2);
 928                 spin_lock_irqsave(&ha->hardware_lock, flags);
 929         }
 930         tgt->tgt_stop = 0;
 931         tgt->tgt_stopped = 1;
 932         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 933         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 934
 935         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 936             tgt);
 937 }
 938 EXPORT_SYMBOL(qlt_stop_phase2);
 939
 940 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 941 static void qlt_release(struct qla_tgt *tgt)
 942 {
 943         scsi_qla_host_t *vha = tgt->vha;
 944
 945         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 946                 qlt_stop_phase2(tgt);
 947
 948         vha->vha_tgt.qla_tgt = NULL;
 949
 950         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 951             "Release of tgt %p finished\n", tgt);
 952
 953         kfree(tgt);
 954 }
 955
 956 /* ha->hardware_lock supposed to be held on entry */
 957 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 958         const void *param, unsigned int param_size)
 959 {
 960         struct qla_tgt_sess_work_param *prm;
 961         unsigned long flags;
 962
 963         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 964         if (!prm) {
 965                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 966                     "qla_target(%d): Unable to create session "
 967                     "work, command will be refused", 0);
 968                 return -ENOMEM;
 969         }
 970
 971         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 972             "Scheduling work (type %d, prm %p)"
 973             " to find session for param %p (size %d, tgt %p)\n",
 974             type, prm, param, param_size, tgt);
 975
 976         prm->type = type;
 977         memcpy(&prm->tm_iocb, param, param_size);
 978
 979         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 980         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 981         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 982
 983         schedule_work(&tgt->sess_work);
 984
 985         return 0;
 986 }
 987
 988 /*
 989  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 990  */
 991 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 992         struct imm_ntfy_from_isp *ntfy,
 993         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 994         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 995 {
 996         struct qla_hw_data *ha = vha->hw;
 997         request_t *pkt;
 998         struct nack_to_isp *nack;
 999
1000         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1001
1002         /* Send marker if required */
1003         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1004                 return;
1005
1006         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1007         if (!pkt) {
1008                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1009                     "qla_target(%d): %s failed: unable to allocate "
1010                     "request packet\n", vha->vp_idx, __func__);
1011                 return;
1012         }
1013
1014         if (vha->vha_tgt.qla_tgt != NULL)
1015                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1016
1017         pkt->entry_type = NOTIFY_ACK_TYPE;
1018         pkt->entry_count = 1;
1019
1020         nack = (struct nack_to_isp *)pkt;
1021         nack->ox_id = ntfy->ox_id;
1022
1023         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1024         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1025                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1026                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1027         }
1028         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1029         nack->u.isp24.status = ntfy->u.isp24.status;
1030         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1031         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1032         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1033         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1034         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1035         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1036         nack->u.isp24.srr_reject_code = srr_reject_code;
1037         nack->u.isp24.srr_reject_code_expl = srr_explan;
1038         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1039
1040         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1041             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1042             vha->vp_idx, nack->u.isp24.status);
1043
1044         /* Memory Barrier */
1045         wmb();
1046         qla2x00_start_iocbs(vha, vha->req);
1047 }
1048
1049 /*
1050  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1051  */
1052 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1053         struct abts_recv_from_24xx *abts, uint32_t status,
1054         bool ids_reversed)
1055 {
1056         struct qla_hw_data *ha = vha->hw;
1057         struct abts_resp_to_24xx *resp;
1058         uint32_t f_ctl;
1059         uint8_t *p;
1060
1061         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1062             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1063             ha, abts, status);
1064
1065         /* Send marker if required */
1066         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1067                 return;
1068
1069         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1070         if (!resp) {
1071                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1072                     "qla_target(%d): %s failed: unable to allocate "
1073                     "request packet", vha->vp_idx, __func__);
1074                 return;
1075         }
1076
1077         resp->entry_type = ABTS_RESP_24XX;
1078         resp->entry_count = 1;
1079         resp->nport_handle = abts->nport_handle;
1080         resp->vp_index = vha->vp_idx;
1081         resp->sof_type = abts->sof_type;
1082         resp->exchange_address = abts->exchange_address;
1083         resp->fcp_hdr_le = abts->fcp_hdr_le;
1084         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1085             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1086             F_CTL_SEQ_INITIATIVE);
1087         p = (uint8_t *)&f_ctl;
1088         resp->fcp_hdr_le.f_ctl[0] = *p++;
1089         resp->fcp_hdr_le.f_ctl[1] = *p++;
1090         resp->fcp_hdr_le.f_ctl[2] = *p;
1091         if (ids_reversed) {
1092                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1093                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1094                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1095                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1096                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1097                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1098         } else {
1099                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1100                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1101                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1102                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1103                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1104                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1105         }
1106         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1107         if (status == FCP_TMF_CMPL) {
1108                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1109                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1110                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1111                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1112                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1113                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1114         } else {
1115                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1116                 resp->payload.ba_rjt.reason_code =
1117                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1118                 /* Other bytes are zero */
1119         }
1120
1121         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1122
1123         /* Memory Barrier */
1124         wmb();
1125         qla2x00_start_iocbs(vha, vha->req);
1126 }
1127
1128 /*
1129  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1130  */
1131 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1132         struct abts_resp_from_24xx_fw *entry)
1133 {
1134         struct ctio7_to_24xx *ctio;
1135
1136         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1137             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1138         /* Send marker if required */
1139         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1140                 return;
1141
1142         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1143         if (ctio == NULL) {
1144                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1145                     "qla_target(%d): %s failed: unable to allocate "
1146                     "request packet\n", vha->vp_idx, __func__);
1147                 return;
1148         }
1149
1150         /*
1151          * We've got on entrance firmware's response on by us generated
1152          * ABTS response. So, in it ID fields are reversed.
1153          */
1154
1155         ctio->entry_type = CTIO_TYPE7;
1156         ctio->entry_count = 1;
1157         ctio->nport_handle = entry->nport_handle;
1158         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1159         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1160         ctio->vp_index = vha->vp_idx;
1161         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1162         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1163         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1164         ctio->exchange_addr = entry->exchange_addr_to_abort;
1165         ctio->u.status1.flags =
1166             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1167                 CTIO7_FLAGS_TERMINATE);
1168         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1169
1170         /* Memory Barrier */
1171         wmb();
1172         qla2x00_start_iocbs(vha, vha->req);
1173
1174         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1175             FCP_TMF_CMPL, true);
1176 }
1177
1178 /* ha->hardware_lock supposed to be held on entry */
1179 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1180         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1181 {
1182         struct qla_hw_data *ha = vha->hw;
1183         struct se_session *se_sess = sess->se_sess;
1184         struct qla_tgt_mgmt_cmd *mcmd;
1185         struct se_cmd *se_cmd;
1186         u32 lun = 0;
1187         int rc;
1188         bool found_lun = false;
1189
1190         spin_lock(&se_sess->sess_cmd_lock);
1191         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1192                 struct qla_tgt_cmd *cmd =
1193                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1194                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1195                         lun = cmd->unpacked_lun;
1196                         found_lun = true;
1197                         break;
1198                 }
1199         }
1200         spin_unlock(&se_sess->sess_cmd_lock);
1201
1202         if (!found_lun)
1203                 return -ENOENT;
1204
1205         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1206             "qla_target(%d): task abort (tag=%d)\n",
1207             vha->vp_idx, abts->exchange_addr_to_abort);
1208
1209         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1210         if (mcmd == NULL) {
1211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1212                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1213                     vha->vp_idx, __func__);
1214                 return -ENOMEM;
1215         }
1216         memset(mcmd, 0, sizeof(*mcmd));
1217
1218         mcmd->sess = sess;
1219         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1220         mcmd->reset_count = vha->hw->chip_reset;
1221
1222         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1223             abts->exchange_addr_to_abort);
1224         if (rc != 0) {
1225                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1226                     "qla_target(%d):  tgt_ops->handle_tmr()"
1227                     " failed: %d", vha->vp_idx, rc);
1228                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1229                 return -EFAULT;
1230         }
1231
1232         return 0;
1233 }
1234
1235 /*
1236  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1237  */
1238 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1239         struct abts_recv_from_24xx *abts)
1240 {
1241         struct qla_hw_data *ha = vha->hw;
1242         struct qla_tgt_sess *sess;
1243         uint32_t tag = abts->exchange_addr_to_abort;
1244         uint8_t s_id[3];
1245         int rc;
1246
1247         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1248                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1249                     "qla_target(%d): ABTS: Abort Sequence not "
1250                     "supported\n", vha->vp_idx);
1251                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1252                 return;
1253         }
1254
1255         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1257                     "qla_target(%d): ABTS: Unknown Exchange "
1258                     "Address received\n", vha->vp_idx);
1259                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1260                 return;
1261         }
1262
1263         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1264             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1265             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1266             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1267             le32_to_cpu(abts->fcp_hdr_le.parameter));
1268
1269         s_id[0] = abts->fcp_hdr_le.s_id[2];
1270         s_id[1] = abts->fcp_hdr_le.s_id[1];
1271         s_id[2] = abts->fcp_hdr_le.s_id[0];
1272
1273         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1274         if (!sess) {
1275                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1276                     "qla_target(%d): task abort for non-existant session\n",
1277                     vha->vp_idx);
1278                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1279                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1280                 if (rc != 0) {
1281                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1282                             false);
1283                 }
1284                 return;
1285         }
1286
1287         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1288         if (rc != 0) {
1289                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1290                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1291                     vha->vp_idx, rc);
1292                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1293                 return;
1294         }
1295 }
1296
1297 /*
1298  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1299  */
1300 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1301         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1302 {
1303         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1304         struct ctio7_to_24xx *ctio;
1305         uint16_t temp;
1306
1307         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1308             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1309             ha, atio, resp_code);
1310
1311         /* Send marker if required */
1312         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1313                 return;
1314
1315         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1316         if (ctio == NULL) {
1317                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1318                     "qla_target(%d): %s failed: unable to allocate "
1319                     "request packet\n", ha->vp_idx, __func__);
1320                 return;
1321         }
1322
1323         ctio->entry_type = CTIO_TYPE7;
1324         ctio->entry_count = 1;
1325         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1326         ctio->nport_handle = mcmd->sess->loop_id;
1327         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1328         ctio->vp_index = ha->vp_idx;
1329         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1330         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1331         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1332         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1333         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1334             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1335                 CTIO7_FLAGS_SEND_STATUS);
1336         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1337         ctio->u.status1.ox_id = cpu_to_le16(temp);
1338         ctio->u.status1.scsi_status =
1339             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1340         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1341         ctio->u.status1.sense_data[0] = resp_code;
1342
1343         /* Memory Barrier */
1344         wmb();
1345         qla2x00_start_iocbs(ha, ha->req);
1346 }
1347
1348 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1349 {
1350         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1351 }
1352 EXPORT_SYMBOL(qlt_free_mcmd);
1353
1354 /* callback from target fabric module code */
1355 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1356 {
1357         struct scsi_qla_host *vha = mcmd->sess->vha;
1358         struct qla_hw_data *ha = vha->hw;
1359         unsigned long flags;
1360
1361         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1362             "TM response mcmd (%p) status %#x state %#x",
1363             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1364
1365         spin_lock_irqsave(&ha->hardware_lock, flags);
1366
1367         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1368                 /*
1369                  * Either a chip reset is active or this request was from
1370                  * previous life, just abort the processing.
1371                  */
1372                 ql_dbg(ql_dbg_async, vha, 0xe100,
1373                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1374                         qla2x00_reset_active(vha), mcmd->reset_count,
1375                         ha->chip_reset);
1376                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1377                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1378                 return;
1379         }
1380
1381         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1382                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1383                     0, 0, 0, 0, 0, 0);
1384         else {
1385                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1386                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1387                             mcmd->fc_tm_rsp, false);
1388                 else
1389                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1390                             mcmd->fc_tm_rsp);
1391         }
1392         /*
1393          * Make the callback for ->free_mcmd() to queue_work() and invoke
1394          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1395          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1396          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1397          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1398          * qlt_xmit_tm_rsp() returns here..
1399          */
1400         ha->tgt.tgt_ops->free_mcmd(mcmd);
1401         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1402 }
1403 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1404
1405 /* No locks */
1406 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1407 {
1408         struct qla_tgt_cmd *cmd = prm->cmd;
1409
1410         BUG_ON(cmd->sg_cnt == 0);
1411
1412         prm->sg = (struct scatterlist *)cmd->sg;
1413         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1414             cmd->sg_cnt, cmd->dma_data_direction);
1415         if (unlikely(prm->seg_cnt == 0))
1416                 goto out_err;
1417
1418         prm->cmd->sg_mapped = 1;
1419
1420         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1421                 /*
1422                  * If greater than four sg entries then we need to allocate
1423                  * the continuation entries
1424                  */
1425                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1426                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1427                         prm->tgt->datasegs_per_cmd,
1428                         prm->tgt->datasegs_per_cont);
1429         } else {
1430                 /* DIF */
1431                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1432                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1433                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1434                         prm->tot_dsds = prm->seg_cnt;
1435                 } else
1436                         prm->tot_dsds = prm->seg_cnt;
1437
1438                 if (cmd->prot_sg_cnt) {
1439                         prm->prot_sg      = cmd->prot_sg;
1440                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1441                                 cmd->prot_sg, cmd->prot_sg_cnt,
1442                                 cmd->dma_data_direction);
1443                         if (unlikely(prm->prot_seg_cnt == 0))
1444                                 goto out_err;
1445
1446                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1447                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1448                                 /* Dif Bundling not support here */
1449                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1450                                                                 cmd->blk_sz);
1451                                 prm->tot_dsds += prm->prot_seg_cnt;
1452                         } else
1453                                 prm->tot_dsds += prm->prot_seg_cnt;
1454                 }
1455         }
1456
1457         return 0;
1458
1459 out_err:
1460         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1461             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1462             0, prm->cmd->sg_cnt);
1463         return -1;
1464 }
1465
1466 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1467 {
1468         struct qla_hw_data *ha = vha->hw;
1469
1470         if (!cmd->sg_mapped)
1471                 return;
1472
1473         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1474         cmd->sg_mapped = 0;
1475
1476         if (cmd->prot_sg_cnt)
1477                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1478                         cmd->dma_data_direction);
1479
1480         if (cmd->ctx_dsd_alloced)
1481                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1482
1483         if (cmd->ctx)
1484                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1485 }
1486
1487 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1488         uint32_t req_cnt)
1489 {
1490         uint32_t cnt, cnt_in;
1491
1492         if (vha->req->cnt < (req_cnt + 2)) {
1493                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1494                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1495
1496                 if  (vha->req->ring_index < cnt)
1497                         vha->req->cnt = cnt - vha->req->ring_index;
1498                 else
1499                         vha->req->cnt = vha->req->length -
1500                             (vha->req->ring_index - cnt);
1501         }
1502
1503         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1504                 ql_dbg(ql_dbg_io, vha, 0x305a,
1505                     "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",
1506                     vha->vp_idx, vha->req->ring_index,
1507                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1508                 return -EAGAIN;
1509         }
1510         vha->req->cnt -= req_cnt;
1511
1512         return 0;
1513 }
1514
1515 /*
1516  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1517  */
1518 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1519 {
1520         /* Adjust ring index. */
1521         vha->req->ring_index++;
1522         if (vha->req->ring_index == vha->req->length) {
1523                 vha->req->ring_index = 0;
1524                 vha->req->ring_ptr = vha->req->ring;
1525         } else {
1526                 vha->req->ring_ptr++;
1527         }
1528         return (cont_entry_t *)vha->req->ring_ptr;
1529 }
1530
1531 /* ha->hardware_lock supposed to be held on entry */
1532 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1533 {
1534         struct qla_hw_data *ha = vha->hw;
1535         uint32_t h;
1536
1537         h = ha->tgt.current_handle;
1538         /* always increment cmd handle */
1539         do {
1540                 ++h;
1541                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1542                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1543                 if (h == ha->tgt.current_handle) {
1544                         ql_dbg(ql_dbg_io, vha, 0x305b,
1545                             "qla_target(%d): Ran out of "
1546                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1547                         h = QLA_TGT_NULL_HANDLE;
1548                         break;
1549                 }
1550         } while ((h == QLA_TGT_NULL_HANDLE) ||
1551             (h == QLA_TGT_SKIP_HANDLE) ||
1552             (ha->tgt.cmds[h-1] != NULL));
1553
1554         if (h != QLA_TGT_NULL_HANDLE)
1555                 ha->tgt.current_handle = h;
1556
1557         return h;
1558 }
1559
1560 /* ha->hardware_lock supposed to be held on entry */
1561 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1562         struct scsi_qla_host *vha)
1563 {
1564         uint32_t h;
1565         struct ctio7_to_24xx *pkt;
1566         struct qla_hw_data *ha = vha->hw;
1567         struct atio_from_isp *atio = &prm->cmd->atio;
1568         uint16_t temp;
1569
1570         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1571         prm->pkt = pkt;
1572         memset(pkt, 0, sizeof(*pkt));
1573
1574         pkt->entry_type = CTIO_TYPE7;
1575         pkt->entry_count = (uint8_t)prm->req_cnt;
1576         pkt->vp_index = vha->vp_idx;
1577
1578         h = qlt_make_handle(vha);
1579         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1580                 /*
1581                  * CTIO type 7 from the firmware doesn't provide a way to
1582                  * know the initiator's LOOP ID, hence we can't find
1583                  * the session and, so, the command.
1584                  */
1585                 return -EAGAIN;
1586         } else
1587                 ha->tgt.cmds[h-1] = prm->cmd;
1588
1589         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1590         pkt->nport_handle = prm->cmd->loop_id;
1591         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1592         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1593         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1594         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1595         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1596         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1597         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1598         pkt->u.status0.ox_id = cpu_to_le16(temp);
1599         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1600
1601         return 0;
1602 }
1603
1604 /*
1605  * ha->hardware_lock supposed to be held on entry. We have already made sure
1606  * that there is sufficient amount of request entries to not drop it.
1607  */
1608 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1609         struct scsi_qla_host *vha)
1610 {
1611         int cnt;
1612         uint32_t *dword_ptr;
1613         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1614
1615         /* Build continuation packets */
1616         while (prm->seg_cnt > 0) {
1617                 cont_a64_entry_t *cont_pkt64 =
1618                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1619
1620                 /*
1621                  * Make sure that from cont_pkt64 none of
1622                  * 64-bit specific fields used for 32-bit
1623                  * addressing. Cast to (cont_entry_t *) for
1624                  * that.
1625                  */
1626
1627                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1628
1629                 cont_pkt64->entry_count = 1;
1630                 cont_pkt64->sys_define = 0;
1631
1632                 if (enable_64bit_addressing) {
1633                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1634                         dword_ptr =
1635                             (uint32_t *)&cont_pkt64->dseg_0_address;
1636                 } else {
1637                         cont_pkt64->entry_type = CONTINUE_TYPE;
1638                         dword_ptr =
1639                             (uint32_t *)&((cont_entry_t *)
1640                                 cont_pkt64)->dseg_0_address;
1641                 }
1642
1643                 /* Load continuation entry data segments */
1644                 for (cnt = 0;
1645                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1646                     cnt++, prm->seg_cnt--) {
1647                         *dword_ptr++ =
1648                             cpu_to_le32(pci_dma_lo32
1649                                 (sg_dma_address(prm->sg)));
1650                         if (enable_64bit_addressing) {
1651                                 *dword_ptr++ =
1652                                     cpu_to_le32(pci_dma_hi32
1653                                         (sg_dma_address
1654                                         (prm->sg)));
1655                         }
1656                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1657
1658                         prm->sg = sg_next(prm->sg);
1659                 }
1660         }
1661 }
1662
1663 /*
1664  * ha->hardware_lock supposed to be held on entry. We have already made sure
1665  * that there is sufficient amount of request entries to not drop it.
1666  */
1667 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1668         struct scsi_qla_host *vha)
1669 {
1670         int cnt;
1671         uint32_t *dword_ptr;
1672         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1673         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1674
1675         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1676
1677         /* Setup packet address segment pointer */
1678         dword_ptr = pkt24->u.status0.dseg_0_address;
1679
1680         /* Set total data segment count */
1681         if (prm->seg_cnt)
1682                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1683
1684         if (prm->seg_cnt == 0) {
1685                 /* No data transfer */
1686                 *dword_ptr++ = 0;
1687                 *dword_ptr = 0;
1688                 return;
1689         }
1690
1691         /* If scatter gather */
1692
1693         /* Load command entry data segments */
1694         for (cnt = 0;
1695             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1696             cnt++, prm->seg_cnt--) {
1697                 *dword_ptr++ =
1698                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1699                 if (enable_64bit_addressing) {
1700                         *dword_ptr++ =
1701                             cpu_to_le32(pci_dma_hi32(
1702                                 sg_dma_address(prm->sg)));
1703                 }
1704                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1705
1706                 prm->sg = sg_next(prm->sg);
1707         }
1708
1709         qlt_load_cont_data_segments(prm, vha);
1710 }
1711
1712 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1713 {
1714         return cmd->bufflen > 0;
1715 }
1716
1717 /*
1718  * Called without ha->hardware_lock held
1719  */
1720 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1721         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1722         uint32_t *full_req_cnt)
1723 {
1724         struct qla_tgt *tgt = cmd->tgt;
1725         struct scsi_qla_host *vha = tgt->vha;
1726         struct qla_hw_data *ha = vha->hw;
1727         struct se_cmd *se_cmd = &cmd->se_cmd;
1728
1729         if (unlikely(cmd->aborted)) {
1730                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1731                        "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
1732                        vha->vp_idx, cmd, se_cmd, se_cmd->tag);
1733
1734                 cmd->state = QLA_TGT_STATE_ABORTED;
1735                 cmd->cmd_flags |= BIT_6;
1736
1737                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1738
1739                 /* !! At this point cmd could be already freed !! */
1740                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1741         }
1742
1743         prm->cmd = cmd;
1744         prm->tgt = tgt;
1745         prm->rq_result = scsi_status;
1746         prm->sense_buffer = &cmd->sense_buffer[0];
1747         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1748         prm->sg = NULL;
1749         prm->seg_cnt = -1;
1750         prm->req_cnt = 1;
1751         prm->add_status_pkt = 0;
1752
1753         /* Send marker if required */
1754         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1755                 return -EFAULT;
1756
1757         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1758                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1759                         return -EAGAIN;
1760         }
1761
1762         *full_req_cnt = prm->req_cnt;
1763
1764         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1765                 prm->residual = se_cmd->residual_count;
1766                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1767                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1768                        prm->residual, se_cmd->tag,
1769                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1770                        cmd->bufflen, prm->rq_result);
1771                 prm->rq_result |= SS_RESIDUAL_UNDER;
1772         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1773                 prm->residual = se_cmd->residual_count;
1774                 ql_dbg(ql_dbg_io, vha, 0x305d,
1775                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1776                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1777                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1778                 prm->rq_result |= SS_RESIDUAL_OVER;
1779         }
1780
1781         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1782                 /*
1783                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1784                  * ignored in *xmit_response() below
1785                  */
1786                 if (qlt_has_data(cmd)) {
1787                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1788                             (IS_FWI2_CAPABLE(ha) &&
1789                             (prm->rq_result != 0))) {
1790                                 prm->add_status_pkt = 1;
1791                                 (*full_req_cnt)++;
1792                         }
1793                 }
1794         }
1795
1796         return 0;
1797 }
1798
1799 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1800         struct qla_tgt_cmd *cmd, int sending_sense)
1801 {
1802         if (ha->tgt.enable_class_2)
1803                 return 0;
1804
1805         if (sending_sense)
1806                 return cmd->conf_compl_supported;
1807         else
1808                 return ha->tgt.enable_explicit_conf &&
1809                     cmd->conf_compl_supported;
1810 }
1811
1812 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1813 /*
1814  *  Original taken from the XFS code
1815  */
1816 static unsigned long qlt_srr_random(void)
1817 {
1818         static int Inited;
1819         static unsigned long RandomValue;
1820         static DEFINE_SPINLOCK(lock);
1821         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1822         register long rv;
1823         register long lo;
1824         register long hi;
1825         unsigned long flags;
1826
1827         spin_lock_irqsave(&lock, flags);
1828         if (!Inited) {
1829                 RandomValue = jiffies;
1830                 Inited = 1;
1831         }
1832         rv = RandomValue;
1833         hi = rv / 127773;
1834         lo = rv % 127773;
1835         rv = 16807 * lo - 2836 * hi;
1836         if (rv <= 0)
1837                 rv += 2147483647;
1838         RandomValue = rv;
1839         spin_unlock_irqrestore(&lock, flags);
1840         return rv;
1841 }
1842
1843 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1844 {
1845 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1846         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1847             == 50) {
1848                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1849                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1850                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
1851         }
1852 #endif
1853         /*
1854          * It's currently not possible to simulate SRRs for FCP_WRITE without
1855          * a physical link layer failure, so don't even try here..
1856          */
1857         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1858                 return;
1859
1860         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1861             ((qlt_srr_random() % 100) == 20)) {
1862                 int i, leave = 0;
1863                 unsigned int tot_len = 0;
1864
1865                 while (leave == 0)
1866                         leave = qlt_srr_random() % cmd->sg_cnt;
1867
1868                 for (i = 0; i < leave; i++)
1869                         tot_len += cmd->sg[i].length;
1870
1871                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1872                     "Cutting cmd %p (tag %d) buffer"
1873                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1874                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
1875                     cmd->bufflen, cmd->sg_cnt);
1876
1877                 cmd->bufflen = tot_len;
1878                 cmd->sg_cnt = leave;
1879         }
1880
1881         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1882                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1883
1884                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1885                     "Cutting cmd %p (tag %d) buffer head "
1886                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
1887                     cmd->bufflen);
1888                 if (offset == 0)
1889                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1890                 else if (qlt_set_data_offset(cmd, offset)) {
1891                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1892                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
1893                 }
1894         }
1895 }
1896 #else
1897 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1898 {}
1899 #endif
1900
1901 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1902         struct qla_tgt_prm *prm)
1903 {
1904         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1905             (uint32_t)sizeof(ctio->u.status1.sense_data));
1906         ctio->u.status0.flags |=
1907             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1908         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1909                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1910                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1911                     CTIO7_FLAGS_CONFORM_REQ);
1912         }
1913         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1914         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1915         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1916                 int i;
1917
1918                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1919                         if (prm->cmd->se_cmd.scsi_status != 0) {
1920                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1921                                     "Skipping EXPLICIT_CONFORM and "
1922                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1923                                     "non GOOD status\n");
1924                                 goto skip_explict_conf;
1925                         }
1926                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1927                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1928                             CTIO7_FLAGS_CONFORM_REQ);
1929                 }
1930 skip_explict_conf:
1931                 ctio->u.status1.flags &=
1932                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1933                 ctio->u.status1.flags |=
1934                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1935                 ctio->u.status1.scsi_status |=
1936                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1937                 ctio->u.status1.sense_length =
1938                     cpu_to_le16(prm->sense_buffer_len);
1939                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1940                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1941                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1942 #if 0
1943                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1944                         static int q;
1945                         if (q < 10) {
1946                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1947                                     "qla_target(%d): %d bytes of sense "
1948                                     "lost", prm->tgt->ha->vp_idx,
1949                                     prm->sense_buffer_len % 4);
1950                                 q++;
1951                         }
1952                 }
1953 #endif
1954         } else {
1955                 ctio->u.status1.flags &=
1956                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1957                 ctio->u.status1.flags |=
1958                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1959                 ctio->u.status1.sense_length = 0;
1960                 memset(ctio->u.status1.sense_data, 0,
1961                     sizeof(ctio->u.status1.sense_data));
1962         }
1963
1964         /* Sense with len > 24, is it possible ??? */
1965 }
1966
1967
1968
1969 /* diff  */
1970 static inline int
1971 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1972 {
1973         /*
1974          * Uncomment when corresponding SCSI changes are done.
1975          *
1976          if (!sp->cmd->prot_chk)
1977          return 0;
1978          *
1979          */
1980         switch (se_cmd->prot_op) {
1981         case TARGET_PROT_DOUT_INSERT:
1982         case TARGET_PROT_DIN_STRIP:
1983                 if (ql2xenablehba_err_chk >= 1)
1984                         return 1;
1985                 break;
1986         case TARGET_PROT_DOUT_PASS:
1987         case TARGET_PROT_DIN_PASS:
1988                 if (ql2xenablehba_err_chk >= 2)
1989                         return 1;
1990                 break;
1991         case TARGET_PROT_DIN_INSERT:
1992         case TARGET_PROT_DOUT_STRIP:
1993                 return 1;
1994         default:
1995                 break;
1996         }
1997         return 0;
1998 }
1999
2000 /*
2001  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2002  *
2003  */
2004 static inline void
2005 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2006 {
2007         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2008
2009         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2010          * have been immplemented by TCM, before AppTag is avail.
2011          * Look for modesense_handlers[]
2012          */
2013         ctx->app_tag = 0;
2014         ctx->app_tag_mask[0] = 0x0;
2015         ctx->app_tag_mask[1] = 0x0;
2016
2017         switch (se_cmd->prot_type) {
2018         case TARGET_DIF_TYPE0_PROT:
2019                 /*
2020                  * No check for ql2xenablehba_err_chk, as it would be an
2021                  * I/O error if hba tag generation is not done.
2022                  */
2023                 ctx->ref_tag = cpu_to_le32(lba);
2024
2025                 if (!qlt_hba_err_chk_enabled(se_cmd))
2026                         break;
2027
2028                 /* enable ALL bytes of the ref tag */
2029                 ctx->ref_tag_mask[0] = 0xff;
2030                 ctx->ref_tag_mask[1] = 0xff;
2031                 ctx->ref_tag_mask[2] = 0xff;
2032                 ctx->ref_tag_mask[3] = 0xff;
2033                 break;
2034         /*
2035          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2036          * 16 bit app tag.
2037          */
2038         case TARGET_DIF_TYPE1_PROT:
2039                 ctx->ref_tag = cpu_to_le32(lba);
2040
2041                 if (!qlt_hba_err_chk_enabled(se_cmd))
2042                         break;
2043
2044                 /* enable ALL bytes of the ref tag */
2045                 ctx->ref_tag_mask[0] = 0xff;
2046                 ctx->ref_tag_mask[1] = 0xff;
2047                 ctx->ref_tag_mask[2] = 0xff;
2048                 ctx->ref_tag_mask[3] = 0xff;
2049                 break;
2050         /*
2051          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2052          * match LBA in CDB + N
2053          */
2054         case TARGET_DIF_TYPE2_PROT:
2055                 ctx->ref_tag = cpu_to_le32(lba);
2056
2057                 if (!qlt_hba_err_chk_enabled(se_cmd))
2058                         break;
2059
2060                 /* enable ALL bytes of the ref tag */
2061                 ctx->ref_tag_mask[0] = 0xff;
2062                 ctx->ref_tag_mask[1] = 0xff;
2063                 ctx->ref_tag_mask[2] = 0xff;
2064                 ctx->ref_tag_mask[3] = 0xff;
2065                 break;
2066
2067         /* For Type 3 protection: 16 bit GUARD only */
2068         case TARGET_DIF_TYPE3_PROT:
2069                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2070                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2071                 break;
2072         }
2073 }
2074
2075
2076 static inline int
2077 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2078 {
2079         uint32_t                *cur_dsd;
2080         int                     sgc;
2081         uint32_t                transfer_length = 0;
2082         uint32_t                data_bytes;
2083         uint32_t                dif_bytes;
2084         uint8_t                 bundling = 1;
2085         uint8_t                 *clr_ptr;
2086         struct crc_context      *crc_ctx_pkt = NULL;
2087         struct qla_hw_data      *ha;
2088         struct ctio_crc2_to_fw  *pkt;
2089         dma_addr_t              crc_ctx_dma;
2090         uint16_t                fw_prot_opts = 0;
2091         struct qla_tgt_cmd      *cmd = prm->cmd;
2092         struct se_cmd           *se_cmd = &cmd->se_cmd;
2093         uint32_t h;
2094         struct atio_from_isp *atio = &prm->cmd->atio;
2095         uint16_t t16;
2096
2097         sgc = 0;
2098         ha = vha->hw;
2099
2100         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2101         prm->pkt = pkt;
2102         memset(pkt, 0, sizeof(*pkt));
2103
2104         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2105                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2106                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2107                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2108
2109         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2110             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2111                 bundling = 0;
2112
2113         /* Compute dif len and adjust data len to incude protection */
2114         data_bytes = cmd->bufflen;
2115         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2116
2117         switch (se_cmd->prot_op) {
2118         case TARGET_PROT_DIN_INSERT:
2119         case TARGET_PROT_DOUT_STRIP:
2120                 transfer_length = data_bytes;
2121                 data_bytes += dif_bytes;
2122                 break;
2123
2124         case TARGET_PROT_DIN_STRIP:
2125         case TARGET_PROT_DOUT_INSERT:
2126         case TARGET_PROT_DIN_PASS:
2127         case TARGET_PROT_DOUT_PASS:
2128                 transfer_length = data_bytes + dif_bytes;
2129                 break;
2130
2131         default:
2132                 BUG();
2133                 break;
2134         }
2135
2136         if (!qlt_hba_err_chk_enabled(se_cmd))
2137                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2138         /* HBA error checking enabled */
2139         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2140                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2141                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2142                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2143                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2144                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2145         }
2146
2147         switch (se_cmd->prot_op) {
2148         case TARGET_PROT_DIN_INSERT:
2149         case TARGET_PROT_DOUT_INSERT:
2150                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2151                 break;
2152         case TARGET_PROT_DIN_STRIP:
2153         case TARGET_PROT_DOUT_STRIP:
2154                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2155                 break;
2156         case TARGET_PROT_DIN_PASS:
2157         case TARGET_PROT_DOUT_PASS:
2158                 fw_prot_opts |= PO_MODE_DIF_PASS;
2159                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2160                 break;
2161         default:/* Normal Request */
2162                 fw_prot_opts |= PO_MODE_DIF_PASS;
2163                 break;
2164         }
2165
2166
2167         /* ---- PKT ---- */
2168         /* Update entry type to indicate Command Type CRC_2 IOCB */
2169         pkt->entry_type  = CTIO_CRC2;
2170         pkt->entry_count = 1;
2171         pkt->vp_index = vha->vp_idx;
2172
2173         h = qlt_make_handle(vha);
2174         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2175                 /*
2176                  * CTIO type 7 from the firmware doesn't provide a way to
2177                  * know the initiator's LOOP ID, hence we can't find
2178                  * the session and, so, the command.
2179                  */
2180                 return -EAGAIN;
2181         } else
2182                 ha->tgt.cmds[h-1] = prm->cmd;
2183
2184
2185         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2186         pkt->nport_handle = prm->cmd->loop_id;
2187         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2188         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2189         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2190         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2191         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2192
2193         /* silence compile warning */
2194         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2195         pkt->ox_id  = cpu_to_le16(t16);
2196
2197         t16 = (atio->u.isp24.attr << 9);
2198         pkt->flags |= cpu_to_le16(t16);
2199         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2200
2201         /* Set transfer direction */
2202         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2203                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2204         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2205                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2206
2207
2208         pkt->dseg_count = prm->tot_dsds;
2209         /* Fibre channel byte count */
2210         pkt->transfer_length = cpu_to_le32(transfer_length);
2211
2212
2213         /* ----- CRC context -------- */
2214
2215         /* Allocate CRC context from global pool */
2216         crc_ctx_pkt = cmd->ctx =
2217             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2218
2219         if (!crc_ctx_pkt)
2220                 goto crc_queuing_error;
2221
2222         /* Zero out CTX area. */
2223         clr_ptr = (uint8_t *)crc_ctx_pkt;
2224         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2225
2226         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2227         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2228
2229         /* Set handle */
2230         crc_ctx_pkt->handle = pkt->handle;
2231
2232         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2233
2234         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2235         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2236         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2237
2238
2239         if (!bundling) {
2240                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2241         } else {
2242                 /*
2243                  * Configure Bundling if we need to fetch interlaving
2244                  * protection PCI accesses
2245                  */
2246                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2247                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2248                 crc_ctx_pkt->u.bundling.dseg_count =
2249                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2250                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2251         }
2252
2253         /* Finish the common fields of CRC pkt */
2254         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2255         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2256         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2257         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2258
2259
2260         /* Walks data segments */
2261         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2262
2263         if (!bundling && prm->prot_seg_cnt) {
2264                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2265                         prm->tot_dsds, cmd))
2266                         goto crc_queuing_error;
2267         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2268                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2269                 goto crc_queuing_error;
2270
2271         if (bundling && prm->prot_seg_cnt) {
2272                 /* Walks dif segments */
2273                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2274
2275                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2276                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2277                         prm->prot_seg_cnt, cmd))
2278                         goto crc_queuing_error;
2279         }
2280         return QLA_SUCCESS;
2281
2282 crc_queuing_error:
2283         /* Cleanup will be performed by the caller */
2284
2285         return QLA_FUNCTION_FAILED;
2286 }
2287
2288
2289 /*
2290  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2291  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2292  */
2293 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2294         uint8_t scsi_status)
2295 {
2296         struct scsi_qla_host *vha = cmd->vha;
2297         struct qla_hw_data *ha = vha->hw;
2298         struct ctio7_to_24xx *pkt;
2299         struct qla_tgt_prm prm;
2300         uint32_t full_req_cnt = 0;
2301         unsigned long flags = 0;
2302         int res;
2303
2304         memset(&prm, 0, sizeof(prm));
2305         qlt_check_srr_debug(cmd, &xmit_type);
2306
2307         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2308             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2309             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2310             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2311             &cmd->se_cmd);
2312
2313         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2314             &full_req_cnt);
2315         if (unlikely(res != 0)) {
2316                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2317                         return 0;
2318
2319                 return res;
2320         }
2321
2322         spin_lock_irqsave(&ha->hardware_lock, flags);
2323
2324         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2325                 /*
2326                  * Either a chip reset is active or this request was from
2327                  * previous life, just abort the processing.
2328                  */
2329                 cmd->state = QLA_TGT_STATE_PROCESSED;
2330                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2331                 ql_dbg(ql_dbg_async, vha, 0xe101,
2332                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2333                         qla2x00_reset_active(vha), cmd->reset_count,
2334                         ha->chip_reset);
2335                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2336                 return 0;
2337         }
2338
2339         /* Does F/W have an IOCBs for this request */
2340         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2341         if (unlikely(res))
2342                 goto out_unmap_unlock;
2343
2344         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2345                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2346         else
2347                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2348         if (unlikely(res != 0))
2349                 goto out_unmap_unlock;
2350
2351
2352         pkt = (struct ctio7_to_24xx *)prm.pkt;
2353
2354         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2355                 pkt->u.status0.flags |=
2356                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2357                         CTIO7_FLAGS_STATUS_MODE_0);
2358
2359                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2360                         qlt_load_data_segments(&prm, vha);
2361
2362                 if (prm.add_status_pkt == 0) {
2363                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2364                                 pkt->u.status0.scsi_status =
2365                                     cpu_to_le16(prm.rq_result);
2366                                 pkt->u.status0.residual =
2367                                     cpu_to_le32(prm.residual);
2368                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2369                                     CTIO7_FLAGS_SEND_STATUS);
2370                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2371                                         pkt->u.status0.flags |=
2372                                             __constant_cpu_to_le16(
2373                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2374                                                 CTIO7_FLAGS_CONFORM_REQ);
2375                                 }
2376                         }
2377
2378                 } else {
2379                         /*
2380                          * We have already made sure that there is sufficient
2381                          * amount of request entries to not drop HW lock in
2382                          * req_pkt().
2383                          */
2384                         struct ctio7_to_24xx *ctio =
2385                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2386
2387                         ql_dbg(ql_dbg_io, vha, 0x305e,
2388                             "Building additional status packet 0x%p.\n",
2389                             ctio);
2390
2391                         /*
2392                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2393                          * ctio7_to_24xx
2394                          */
2395                         memcpy(ctio, pkt, sizeof(*ctio));
2396                         /* reset back to CTIO7 */
2397                         ctio->entry_count = 1;
2398                         ctio->entry_type = CTIO_TYPE7;
2399                         ctio->dseg_count = 0;
2400                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2401                             CTIO7_FLAGS_DATA_IN);
2402
2403                         /* Real finish is ctio_m1's finish */
2404                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2405                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2406                             CTIO7_FLAGS_DONT_RET_CTIO);
2407
2408                         /* qlt_24xx_init_ctio_to_isp will correct
2409                          * all neccessary fields that's part of CTIO7.
2410                          * There should be no residual of CTIO-CRC2 data.
2411                          */
2412                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2413                             &prm);
2414                         pr_debug("Status CTIO7: %p\n", ctio);
2415                 }
2416         } else
2417                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2418
2419
2420         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2421         cmd->cmd_sent_to_fw = 1;
2422
2423         /* Memory Barrier */
2424         wmb();
2425         qla2x00_start_iocbs(vha, vha->req);
2426         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2427
2428         return 0;
2429
2430 out_unmap_unlock:
2431         qlt_unmap_sg(vha, cmd);
2432         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2433
2434         return res;
2435 }
2436 EXPORT_SYMBOL(qlt_xmit_response);
2437
2438 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2439 {
2440         struct ctio7_to_24xx *pkt;
2441         struct scsi_qla_host *vha = cmd->vha;
2442         struct qla_hw_data *ha = vha->hw;
2443         struct qla_tgt *tgt = cmd->tgt;
2444         struct qla_tgt_prm prm;
2445         unsigned long flags;
2446         int res = 0;
2447
2448         memset(&prm, 0, sizeof(prm));
2449         prm.cmd = cmd;
2450         prm.tgt = tgt;
2451         prm.sg = NULL;
2452         prm.req_cnt = 1;
2453
2454         /* Send marker if required */
2455         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2456                 return -EIO;
2457
2458         /* Calculate number of entries and segments required */
2459         if (qlt_pci_map_calc_cnt(&prm) != 0)
2460                 return -EAGAIN;
2461
2462         spin_lock_irqsave(&ha->hardware_lock, flags);
2463
2464         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2465                 /*
2466                  * Either a chip reset is active or this request was from
2467                  * previous life, just abort the processing.
2468                  */
2469                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2470                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2471                 ql_dbg(ql_dbg_async, vha, 0xe102,
2472                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2473                         qla2x00_reset_active(vha), cmd->reset_count,
2474                         ha->chip_reset);
2475                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2476                 return 0;
2477         }
2478
2479         /* Does F/W have an IOCBs for this request */
2480         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2481         if (res != 0)
2482                 goto out_unlock_free_unmap;
2483         if (cmd->se_cmd.prot_op)
2484                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2485         else
2486                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2487
2488         if (unlikely(res != 0))
2489                 goto out_unlock_free_unmap;
2490         pkt = (struct ctio7_to_24xx *)prm.pkt;
2491         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2492             CTIO7_FLAGS_STATUS_MODE_0);
2493
2494         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2495                 qlt_load_data_segments(&prm, vha);
2496
2497         cmd->state = QLA_TGT_STATE_NEED_DATA;
2498         cmd->cmd_sent_to_fw = 1;
2499
2500         /* Memory Barrier */
2501         wmb();
2502         qla2x00_start_iocbs(vha, vha->req);
2503         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2504
2505         return res;
2506
2507 out_unlock_free_unmap:
2508         qlt_unmap_sg(vha, cmd);
2509         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2510
2511         return res;
2512 }
2513 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2514
2515
2516 /*
2517  * Checks the guard or meta-data for the type of error
2518  * detected by the HBA.
2519  */
2520 static inline int
2521 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2522                 struct ctio_crc_from_fw *sts)
2523 {
2524         uint8_t         *ap = &sts->actual_dif[0];
2525         uint8_t         *ep = &sts->expected_dif[0];
2526         uint32_t        e_ref_tag, a_ref_tag;
2527         uint16_t        e_app_tag, a_app_tag;
2528         uint16_t        e_guard, a_guard;
2529         uint64_t        lba = cmd->se_cmd.t_task_lba;
2530
2531         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2532         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2533         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2534
2535         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2536         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2537         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2538
2539         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2540             "iocb(s) %p Returned STATUS.\n", sts);
2541
2542         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2543             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2544             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2545             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2546
2547         /*
2548          * Ignore sector if:
2549          * For type     3: ref & app tag is all 'f's
2550          * For type 0,1,2: app tag is all 'f's
2551          */
2552         if ((a_app_tag == 0xffff) &&
2553             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2554              (a_ref_tag == 0xffffffff))) {
2555                 uint32_t blocks_done;
2556
2557                 /* 2TB boundary case covered automatically with this */
2558                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2559                 cmd->se_cmd.bad_sector = e_ref_tag;
2560                 cmd->se_cmd.pi_err = 0;
2561                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2562                         "need to return scsi good\n");
2563
2564                 /* Update protection tag */
2565                 if (cmd->prot_sg_cnt) {
2566                         uint32_t i, j = 0, k = 0, num_ent;
2567                         struct scatterlist *sg, *sgl;
2568
2569
2570                         sgl = cmd->prot_sg;
2571
2572                         /* Patch the corresponding protection tags */
2573                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2574                                 num_ent = sg_dma_len(sg) / 8;
2575                                 if (k + num_ent < blocks_done) {
2576                                         k += num_ent;
2577                                         continue;
2578                                 }
2579                                 j = blocks_done - k - 1;
2580                                 k = blocks_done;
2581                                 break;
2582                         }
2583
2584                         if (k != blocks_done) {
2585                                 ql_log(ql_log_warn, vha, 0xf076,
2586                                     "unexpected tag values tag:lba=%u:%llu)\n",
2587                                     e_ref_tag, (unsigned long long)lba);
2588                                 goto out;
2589                         }
2590
2591 #if 0
2592                         struct sd_dif_tuple *spt;
2593                         /* TODO:
2594                          * This section came from initiator. Is it valid here?
2595                          * should ulp be override with actual val???
2596                          */
2597                         spt = page_address(sg_page(sg)) + sg->offset;
2598                         spt += j;
2599
2600                         spt->app_tag = 0xffff;
2601                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2602                                 spt->ref_tag = 0xffffffff;
2603 #endif
2604                 }
2605
2606                 return 0;
2607         }
2608
2609         /* check guard */
2610         if (e_guard != a_guard) {
2611                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2612                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2613
2614                 ql_log(ql_log_warn, vha, 0xe076,
2615                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2616                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2617                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2618                     a_guard, e_guard, cmd);
2619                 goto out;
2620         }
2621
2622         /* check ref tag */
2623         if (e_ref_tag != a_ref_tag) {
2624                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2625                 cmd->se_cmd.bad_sector = e_ref_tag;
2626
2627                 ql_log(ql_log_warn, vha, 0xe077,
2628                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2629                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2630                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2631                         a_guard, e_guard, cmd);
2632                 goto out;
2633         }
2634
2635         /* check appl tag */
2636         if (e_app_tag != a_app_tag) {
2637                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2638                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2639
2640                 ql_log(ql_log_warn, vha, 0xe078,
2641                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2642                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2643                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2644                         a_guard, e_guard, cmd);
2645                 goto out;
2646         }
2647 out:
2648         return 1;
2649 }
2650
2651
2652 /* If hardware_lock held on entry, might drop it, then reaquire */
2653 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2654 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2655         struct qla_tgt_cmd *cmd,
2656         struct atio_from_isp *atio)
2657 {
2658         struct ctio7_to_24xx *ctio24;
2659         struct qla_hw_data *ha = vha->hw;
2660         request_t *pkt;
2661         int ret = 0;
2662         uint16_t temp;
2663
2664         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2665
2666         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2667         if (pkt == NULL) {
2668                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2669                     "qla_target(%d): %s failed: unable to allocate "
2670                     "request packet\n", vha->vp_idx, __func__);
2671                 return -ENOMEM;
2672         }
2673
2674         if (cmd != NULL) {
2675                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2676                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2677                             "qla_target(%d): Terminating cmd %p with "
2678                             "incorrect state %d\n", vha->vp_idx, cmd,
2679                             cmd->state);
2680                 } else
2681                         ret = 1;
2682         }
2683
2684         pkt->entry_count = 1;
2685         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2686
2687         ctio24 = (struct ctio7_to_24xx *)pkt;
2688         ctio24->entry_type = CTIO_TYPE7;
2689         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2690         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2691         ctio24->vp_index = vha->vp_idx;
2692         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2693         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2694         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2695         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2696         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2697             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2698                 CTIO7_FLAGS_TERMINATE);
2699         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2700         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2701
2702         /* Most likely, it isn't needed */
2703         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2704             &atio->u.isp24.fcp_cmnd.add_cdb[
2705             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2706         if (ctio24->u.status1.residual != 0)
2707                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2708
2709         /* Memory Barrier */
2710         wmb();
2711         qla2x00_start_iocbs(vha, vha->req);
2712         return ret;
2713 }
2714
2715 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2716         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2717 {
2718         unsigned long flags;
2719         int rc;
2720
2721         if (qlt_issue_marker(vha, ha_locked) < 0)
2722                 return;
2723
2724         if (ha_locked) {
2725                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2726                 if (rc == -ENOMEM)
2727                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2728                 goto done;
2729         }
2730         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2731         rc = __qlt_send_term_exchange(vha, cmd, atio);
2732         if (rc == -ENOMEM)
2733                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2734         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2735
2736 done:
2737         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2738             !cmd->cmd_sent_to_fw)) {
2739                 if (!ha_locked && !in_interrupt())
2740                         msleep(250); /* just in case */
2741
2742                 qlt_unmap_sg(vha, cmd);
2743                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2744         }
2745         return;
2746 }
2747
2748 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2749 {
2750         struct list_head free_list;
2751         struct qla_tgt_cmd *cmd, *tcmd;
2752
2753         vha->hw->tgt.leak_exchg_thresh_hold =
2754             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2755
2756         cmd = tcmd = NULL;
2757         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2758                 INIT_LIST_HEAD(&free_list);
2759                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2760
2761                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2762                         list_del(&cmd->cmd_list);
2763                         /* This cmd was never sent to TCM.  There is no need
2764                          * to schedule free or call free_cmd
2765                          */
2766                         qlt_free_cmd(cmd);
2767                         vha->hw->tgt.num_qfull_cmds_alloc--;
2768                 }
2769         }
2770         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2771 }
2772
2773 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2774 {
2775         uint32_t total_leaked;
2776
2777         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2778
2779         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2780             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2781
2782                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2783                     "Chip reset due to exchange starvation: %d/%d.\n",
2784                     total_leaked, vha->hw->fw_xcb_count);
2785
2786                 if (IS_P3P_TYPE(vha->hw))
2787                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2788                 else
2789                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2790                 qla2xxx_wake_dpc(vha);
2791         }
2792
2793 }
2794
2795 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2796 {
2797         struct qla_tgt_sess *sess = cmd->sess;
2798
2799         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2800             "%s: se_cmd[%p] ox_id %04x\n",
2801             __func__, &cmd->se_cmd,
2802             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2803
2804         BUG_ON(cmd->cmd_in_wq);
2805
2806         if (!cmd->q_full)
2807                 qlt_decr_num_pend_cmds(cmd->vha);
2808
2809         BUG_ON(cmd->sg_mapped);
2810         cmd->jiffies_at_free = get_jiffies_64();
2811         if (unlikely(cmd->free_sg))
2812                 kfree(cmd->sg);
2813
2814         if (!sess || !sess->se_sess) {
2815                 WARN_ON(1);
2816                 return;
2817         }
2818         cmd->jiffies_at_free = get_jiffies_64();
2819         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2820 }
2821 EXPORT_SYMBOL(qlt_free_cmd);
2822
2823 /* ha->hardware_lock supposed to be held on entry */
2824 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2825         struct qla_tgt_cmd *cmd, void *ctio)
2826 {
2827         struct qla_tgt_srr_ctio *sc;
2828         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2829         struct qla_tgt_srr_imm *imm;
2830
2831         tgt->ctio_srr_id++;
2832         cmd->cmd_flags |= BIT_15;
2833
2834         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2835             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2836
2837         if (!ctio) {
2838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2839                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2840                     vha->vp_idx);
2841                 return -EINVAL;
2842         }
2843
2844         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2845         if (sc != NULL) {
2846                 sc->cmd = cmd;
2847                 /* IRQ is already OFF */
2848                 spin_lock(&tgt->srr_lock);
2849                 sc->srr_id = tgt->ctio_srr_id;
2850                 list_add_tail(&sc->srr_list_entry,
2851                     &tgt->srr_ctio_list);
2852                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2853                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2854                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2855                         int found = 0;
2856                         list_for_each_entry(imm, &tgt->srr_imm_list,
2857                             srr_list_entry) {
2858                                 if (imm->srr_id == sc->srr_id) {
2859                                         found = 1;
2860                                         break;
2861                                 }
2862                         }
2863                         if (found) {
2864                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2865                                     "Scheduling srr work\n");
2866                                 schedule_work(&tgt->srr_work);
2867                         } else {
2868                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2869                                     "qla_target(%d): imm_srr_id "
2870                                     "== ctio_srr_id (%d), but there is no "
2871                                     "corresponding SRR IMM, deleting CTIO "
2872                                     "SRR %p\n", vha->vp_idx,
2873                                     tgt->ctio_srr_id, sc);
2874                                 list_del(&sc->srr_list_entry);
2875                                 spin_unlock(&tgt->srr_lock);
2876
2877                                 kfree(sc);
2878                                 return -EINVAL;
2879                         }
2880                 }
2881                 spin_unlock(&tgt->srr_lock);
2882         } else {
2883                 struct qla_tgt_srr_imm *ti;
2884
2885                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2886                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2887                     vha->vp_idx);
2888                 spin_lock(&tgt->srr_lock);
2889                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2890                     srr_list_entry) {
2891                         if (imm->srr_id == tgt->ctio_srr_id) {
2892                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2893                                     "IMM SRR %p deleted (id %d)\n",
2894                                     imm, imm->srr_id);
2895                                 list_del(&imm->srr_list_entry);
2896                                 qlt_reject_free_srr_imm(vha, imm, 1);
2897                         }
2898                 }
2899                 spin_unlock(&tgt->srr_lock);
2900
2901                 return -ENOMEM;
2902         }
2903
2904         return 0;
2905 }
2906
2907 /*
2908  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2909  */
2910 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2911         struct qla_tgt_cmd *cmd, uint32_t status)
2912 {
2913         int term = 0;
2914
2915         if (ctio != NULL) {
2916                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2917                 term = !(c->flags &
2918                     __constant_cpu_to_le16(OF_TERM_EXCH));
2919         } else
2920                 term = 1;
2921
2922         if (term)
2923                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2924
2925         return term;
2926 }
2927
2928 /* ha->hardware_lock supposed to be held on entry */
2929 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2930         uint32_t handle)
2931 {
2932         struct qla_hw_data *ha = vha->hw;
2933
2934         handle--;
2935         if (ha->tgt.cmds[handle] != NULL) {
2936                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2937                 ha->tgt.cmds[handle] = NULL;
2938                 return cmd;
2939         } else
2940                 return NULL;
2941 }
2942
2943 /* ha->hardware_lock supposed to be held on entry */
2944 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2945         uint32_t handle, void *ctio)
2946 {
2947         struct qla_tgt_cmd *cmd = NULL;
2948
2949         /* Clear out internal marks */
2950         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2951             CTIO_INTERMEDIATE_HANDLE_MARK);
2952
2953         if (handle != QLA_TGT_NULL_HANDLE) {
2954                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2955                         return NULL;
2956
2957                 /* handle-1 is actually used */
2958                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2959                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2960                             "qla_target(%d): Wrong handle %x received\n",
2961                             vha->vp_idx, handle);
2962                         return NULL;
2963                 }
2964                 cmd = qlt_get_cmd(vha, handle);
2965                 if (unlikely(cmd == NULL)) {
2966                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2967                             "qla_target(%d): Suspicious: unable to "
2968                             "find the command with handle %x\n", vha->vp_idx,
2969                             handle);
2970                         return NULL;
2971                 }
2972         } else if (ctio != NULL) {
2973                 /* We can't get loop ID from CTIO7 */
2974                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2975                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2976                     "support NULL handles\n", vha->vp_idx);
2977                 return NULL;
2978         }
2979
2980         return cmd;
2981 }
2982
2983 /* hardware_lock should be held by caller. */
2984 static void
2985 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2986 {
2987         struct qla_hw_data *ha = vha->hw;
2988         uint32_t handle;
2989
2990         if (cmd->sg_mapped)
2991                 qlt_unmap_sg(vha, cmd);
2992
2993         handle = qlt_make_handle(vha);
2994
2995         /* TODO: fix debug message type and ids. */
2996         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2997                 ql_dbg(ql_dbg_io, vha, 0xff00,
2998                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
2999         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3000                 cmd->write_data_transferred = 0;
3001                 cmd->state = QLA_TGT_STATE_DATA_IN;
3002
3003                 ql_dbg(ql_dbg_io, vha, 0xff01,
3004                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3005
3006                 ha->tgt.tgt_ops->handle_data(cmd);
3007                 return;
3008         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3009                 ql_dbg(ql_dbg_io, vha, 0xff02,
3010                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3011         } else {
3012                 ql_dbg(ql_dbg_io, vha, 0xff03,
3013                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3014                     cmd->state);
3015                 dump_stack();
3016         }
3017
3018         cmd->cmd_flags |= BIT_12;
3019         ha->tgt.tgt_ops->free_cmd(cmd);
3020 }
3021
3022 void
3023 qlt_host_reset_handler(struct qla_hw_data *ha)
3024 {
3025         struct qla_tgt_cmd *cmd;
3026         unsigned long flags;
3027         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3028         scsi_qla_host_t *vha = NULL;
3029         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3030         uint32_t i;
3031
3032         if (!base_vha->hw->tgt.tgt_ops)
3033                 return;
3034
3035         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3036                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3037                         "Target mode disabled\n");
3038                 return;
3039         }
3040
3041         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3042             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3043             base_vha->dpc_flags);
3044
3045         spin_lock_irqsave(&ha->hardware_lock, flags);
3046         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3047                 cmd = qlt_get_cmd(base_vha, i);
3048                 if (!cmd)
3049                         continue;
3050                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3051                 vha = cmd->vha;
3052                 qlt_abort_cmd_on_host_reset(vha, cmd);
3053         }
3054         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3055 }
3056
3057
3058 /*
3059  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3060  */
3061 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3062         uint32_t status, void *ctio)
3063 {
3064         struct qla_hw_data *ha = vha->hw;
3065         struct se_cmd *se_cmd;
3066         const struct target_core_fabric_ops *tfo;
3067         struct qla_tgt_cmd *cmd;
3068
3069         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3070                 /* That could happen only in case of an error/reset/abort */
3071                 if (status != CTIO_SUCCESS) {
3072                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3073                             "Intermediate CTIO received"
3074                             " (status %x)\n", status);
3075                 }
3076                 return;
3077         }
3078
3079         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3080         if (cmd == NULL)
3081                 return;
3082
3083         se_cmd = &cmd->se_cmd;
3084         tfo = se_cmd->se_tfo;
3085         cmd->cmd_sent_to_fw = 0;
3086
3087         qlt_unmap_sg(vha, cmd);
3088
3089         if (unlikely(status != CTIO_SUCCESS)) {
3090                 switch (status & 0xFFFF) {
3091                 case CTIO_LIP_RESET:
3092                 case CTIO_TARGET_RESET:
3093                 case CTIO_ABORTED:
3094                         /* driver request abort via Terminate exchange */
3095                 case CTIO_TIMEOUT:
3096                 case CTIO_INVALID_RX_ID:
3097                         /* They are OK */
3098                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3099                             "qla_target(%d): CTIO with "
3100                             "status %#x received, state %x, se_cmd %p, "
3101                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3102                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3103                             status, cmd->state, se_cmd);
3104                         break;
3105
3106                 case CTIO_PORT_LOGGED_OUT:
3107                 case CTIO_PORT_UNAVAILABLE:
3108                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3109                             "qla_target(%d): CTIO with PORT LOGGED "
3110                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3111                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3112                             status, cmd->state, se_cmd);
3113                         break;
3114
3115                 case CTIO_SRR_RECEIVED:
3116                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3117                             "qla_target(%d): CTIO with SRR_RECEIVED"
3118                             " status %x received (state %x, se_cmd %p)\n",
3119                             vha->vp_idx, status, cmd->state, se_cmd);
3120                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3121                                 break;
3122                         else
3123                                 return;
3124
3125                 case CTIO_DIF_ERROR: {
3126                         struct ctio_crc_from_fw *crc =
3127                                 (struct ctio_crc_from_fw *)ctio;
3128                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3129                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3130                             vha->vp_idx, status, cmd->state, se_cmd,
3131                             *((u64 *)&crc->actual_dif[0]),
3132                             *((u64 *)&crc->expected_dif[0]));
3133
3134                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3135                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3136                                         /* scsi Write/xfer rdy complete */
3137                                         goto skip_term;
3138                                 } else {
3139                                         /* scsi read/xmit respond complete
3140                                          * call handle dif to send scsi status
3141                                          * rather than terminate exchange.
3142                                          */
3143                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3144                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3145                                         return;
3146                                 }
3147                         } else {
3148                                 /* Need to generate a SCSI good completion.
3149                                  * because FW did not send scsi status.
3150                                  */
3151                                 status = 0;
3152                                 goto skip_term;
3153                         }
3154                         break;
3155                 }
3156                 default:
3157                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3158                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3159                             vha->vp_idx, status, cmd->state, se_cmd);
3160                         break;
3161                 }
3162
3163
3164                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3165                  * cmd is already aborted/terminated, we don't
3166                  * need to terminate again.  The exchange is already
3167                  * cleaned up/freed at FW level.  Just cleanup at driver
3168                  * level.
3169                  */
3170                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3171                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3172                         cmd->cmd_flags |= BIT_13;
3173                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3174                                 return;
3175                 }
3176         }
3177 skip_term:
3178
3179         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3180                 ;
3181         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3182                 int rx_status = 0;
3183
3184                 cmd->state = QLA_TGT_STATE_DATA_IN;
3185
3186                 if (unlikely(status != CTIO_SUCCESS))
3187                         rx_status = -EIO;
3188                 else
3189                         cmd->write_data_transferred = 1;
3190
3191                 ha->tgt.tgt_ops->handle_data(cmd);
3192                 return;
3193         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3194                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3195                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3196         } else {
3197                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3198                     "qla_target(%d): A command in state (%d) should "
3199                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3200         }
3201
3202         if (unlikely(status != CTIO_SUCCESS) &&
3203                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3204                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3205                 dump_stack();
3206         }
3207
3208
3209         ha->tgt.tgt_ops->free_cmd(cmd);
3210 }
3211
3212 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3213         uint8_t task_codes)
3214 {
3215         int fcp_task_attr;
3216
3217         switch (task_codes) {
3218         case ATIO_SIMPLE_QUEUE:
3219                 fcp_task_attr = TCM_SIMPLE_TAG;
3220                 break;
3221         case ATIO_HEAD_OF_QUEUE:
3222                 fcp_task_attr = TCM_HEAD_TAG;
3223                 break;
3224         case ATIO_ORDERED_QUEUE:
3225                 fcp_task_attr = TCM_ORDERED_TAG;
3226                 break;
3227         case ATIO_ACA_QUEUE:
3228                 fcp_task_attr = TCM_ACA_TAG;
3229                 break;
3230         case ATIO_UNTAGGED:
3231                 fcp_task_attr = TCM_SIMPLE_TAG;
3232                 break;
3233         default:
3234                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3235                     "qla_target: unknown task code %x, use ORDERED instead\n",
3236                     task_codes);
3237                 fcp_task_attr = TCM_ORDERED_TAG;
3238                 break;
3239         }
3240
3241         return fcp_task_attr;
3242 }
3243
3244 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3245                                         uint8_t *);
3246 /*
3247  * Process context for I/O path into tcm_qla2xxx code
3248  */
3249 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3250 {
3251         scsi_qla_host_t *vha = cmd->vha;
3252         struct qla_hw_data *ha = vha->hw;
3253         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3254         struct qla_tgt_sess *sess = cmd->sess;
3255         struct atio_from_isp *atio = &cmd->atio;
3256         unsigned char *cdb;
3257         unsigned long flags;
3258         uint32_t data_length;
3259         int ret, fcp_task_attr, data_dir, bidi = 0;
3260
3261         cmd->cmd_in_wq = 0;
3262         cmd->cmd_flags |= BIT_1;
3263         if (tgt->tgt_stop)
3264                 goto out_term;
3265
3266         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3267         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3268         cmd->unpacked_lun = scsilun_to_int(
3269             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3270
3271         if (atio->u.isp24.fcp_cmnd.rddata &&
3272             atio->u.isp24.fcp_cmnd.wrdata) {
3273                 bidi = 1;
3274                 data_dir = DMA_TO_DEVICE;
3275         } else if (atio->u.isp24.fcp_cmnd.rddata)
3276                 data_dir = DMA_FROM_DEVICE;
3277         else if (atio->u.isp24.fcp_cmnd.wrdata)
3278                 data_dir = DMA_TO_DEVICE;
3279         else
3280                 data_dir = DMA_NONE;
3281
3282         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3283             atio->u.isp24.fcp_cmnd.task_attr);
3284         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3285             &atio->u.isp24.fcp_cmnd.add_cdb[
3286             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3287
3288         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3289                                           fcp_task_attr, data_dir, bidi);
3290         if (ret != 0)
3291                 goto out_term;
3292         /*
3293          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3294          */
3295         spin_lock_irqsave(&ha->hardware_lock, flags);
3296         ha->tgt.tgt_ops->put_sess(sess);
3297         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3298         return;
3299
3300 out_term:
3301         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3302         /*
3303          * cmd has not sent to target yet, so pass NULL as the second
3304          * argument to qlt_send_term_exchange() and free the memory here.
3305          */
3306         cmd->cmd_flags |= BIT_2;
3307         spin_lock_irqsave(&ha->hardware_lock, flags);
3308         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3309
3310         qlt_decr_num_pend_cmds(vha);
3311         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3312         ha->tgt.tgt_ops->put_sess(sess);
3313         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3314 }
3315
3316 static void qlt_do_work(struct work_struct *work)
3317 {
3318         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3319
3320         __qlt_do_work(cmd);
3321 }
3322
3323 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3324                                        struct qla_tgt_sess *sess,
3325                                        struct atio_from_isp *atio)
3326 {
3327         struct se_session *se_sess = sess->se_sess;
3328         struct qla_tgt_cmd *cmd;
3329         int tag;
3330
3331         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3332         if (tag < 0)
3333                 return NULL;
3334
3335         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3336         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3337
3338         memcpy(&cmd->atio, atio, sizeof(*atio));
3339         cmd->state = QLA_TGT_STATE_NEW;
3340         cmd->tgt = vha->vha_tgt.qla_tgt;
3341         qlt_incr_num_pend_cmds(vha);
3342         cmd->vha = vha;
3343         cmd->se_cmd.map_tag = tag;
3344         cmd->sess = sess;
3345         cmd->loop_id = sess->loop_id;
3346         cmd->conf_compl_supported = sess->conf_compl_supported;
3347
3348         return cmd;
3349 }
3350
3351 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3352                           uint16_t);
3353
3354 static void qlt_create_sess_from_atio(struct work_struct *work)
3355 {
3356         struct qla_tgt_sess_op *op = container_of(work,
3357                                         struct qla_tgt_sess_op, work);
3358         scsi_qla_host_t *vha = op->vha;
3359         struct qla_hw_data *ha = vha->hw;
3360         struct qla_tgt_sess *sess;
3361         struct qla_tgt_cmd *cmd;
3362         unsigned long flags;
3363         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3364
3365         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3366                 "qla_target(%d): Unable to find wwn login"
3367                 " (s_id %x:%x:%x), trying to create it manually\n",
3368                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3369
3370         if (op->atio.u.raw.entry_count > 1) {
3371                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3372                         "Dropping multy entry atio %p\n", &op->atio);
3373                 goto out_term;
3374         }
3375
3376         mutex_lock(&vha->vha_tgt.tgt_mutex);
3377         sess = qlt_make_local_sess(vha, s_id);
3378         /* sess has an extra creation ref. */
3379         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3380
3381         if (!sess)
3382                 goto out_term;
3383         /*
3384          * Now obtain a pre-allocated session tag using the original op->atio
3385          * packet header, and dispatch into __qlt_do_work() using the existing
3386          * process context.
3387          */
3388         cmd = qlt_get_tag(vha, sess, &op->atio);
3389         if (!cmd) {
3390                 spin_lock_irqsave(&ha->hardware_lock, flags);
3391                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3392                 ha->tgt.tgt_ops->put_sess(sess);
3393                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3394                 kfree(op);
3395                 return;
3396         }
3397         /*
3398          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3399          * the extra reference taken above by qlt_make_local_sess()
3400          */
3401         __qlt_do_work(cmd);
3402         kfree(op);
3403         return;
3404
3405 out_term:
3406         spin_lock_irqsave(&ha->hardware_lock, flags);
3407         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3408         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3409         kfree(op);
3410
3411 }
3412
3413 /* ha->hardware_lock supposed to be held on entry */
3414 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3415         struct atio_from_isp *atio)
3416 {
3417         struct qla_hw_data *ha = vha->hw;
3418         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3419         struct qla_tgt_sess *sess;
3420         struct qla_tgt_cmd *cmd;
3421
3422         if (unlikely(tgt->tgt_stop)) {
3423                 ql_dbg(ql_dbg_io, vha, 0x3061,
3424                     "New command while device %p is shutting down\n", tgt);
3425                 return -EFAULT;
3426         }
3427
3428         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3429         if (unlikely(!sess)) {
3430                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3431                                                      GFP_ATOMIC);
3432                 if (!op)
3433                         return -ENOMEM;
3434
3435                 memcpy(&op->atio, atio, sizeof(*atio));
3436                 op->vha = vha;
3437                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3438                 queue_work(qla_tgt_wq, &op->work);
3439                 return 0;
3440         }
3441         /*
3442          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3443          */
3444         kref_get(&sess->se_sess->sess_kref);
3445
3446         cmd = qlt_get_tag(vha, sess, atio);
3447         if (!cmd) {
3448                 ql_dbg(ql_dbg_io, vha, 0x3062,
3449                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3450                 ha->tgt.tgt_ops->put_sess(sess);
3451                 return -ENOMEM;
3452         }
3453
3454         cmd->cmd_flags = 0;
3455         cmd->jiffies_at_alloc = get_jiffies_64();
3456
3457         cmd->reset_count = vha->hw->chip_reset;
3458
3459         cmd->cmd_in_wq = 1;
3460         cmd->cmd_flags |= BIT_0;
3461         INIT_WORK(&cmd->work, qlt_do_work);
3462         queue_work(qla_tgt_wq, &cmd->work);
3463         return 0;
3464
3465 }
3466
3467 /* ha->hardware_lock supposed to be held on entry */
3468 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3469         int fn, void *iocb, int flags)
3470 {
3471         struct scsi_qla_host *vha = sess->vha;
3472         struct qla_hw_data *ha = vha->hw;
3473         struct qla_tgt_mgmt_cmd *mcmd;
3474         int res;
3475         uint8_t tmr_func;
3476
3477         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3478         if (!mcmd) {
3479                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3480                     "qla_target(%d): Allocation of management "
3481                     "command failed, some commands and their data could "
3482                     "leak\n", vha->vp_idx);
3483                 return -ENOMEM;
3484         }
3485         memset(mcmd, 0, sizeof(*mcmd));
3486         mcmd->sess = sess;
3487
3488         if (iocb) {
3489                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3490                     sizeof(mcmd->orig_iocb.imm_ntfy));
3491         }
3492         mcmd->tmr_func = fn;
3493         mcmd->flags = flags;
3494         mcmd->reset_count = vha->hw->chip_reset;
3495
3496         switch (fn) {
3497         case QLA_TGT_CLEAR_ACA:
3498                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3499                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3500                 tmr_func = TMR_CLEAR_ACA;
3501                 break;
3502
3503         case QLA_TGT_TARGET_RESET:
3504                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3505                     "qla_target(%d): TARGET_RESET received\n",
3506                     sess->vha->vp_idx);
3507                 tmr_func = TMR_TARGET_WARM_RESET;
3508                 break;
3509
3510         case QLA_TGT_LUN_RESET:
3511                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3512                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3513                 tmr_func = TMR_LUN_RESET;
3514                 break;
3515
3516         case QLA_TGT_CLEAR_TS:
3517                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3518                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3519                 tmr_func = TMR_CLEAR_TASK_SET;
3520                 break;
3521
3522         case QLA_TGT_ABORT_TS:
3523                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3524                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3525                 tmr_func = TMR_ABORT_TASK_SET;
3526                 break;
3527 #if 0
3528         case QLA_TGT_ABORT_ALL:
3529                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3530                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3531                     sess->vha->vp_idx);
3532                 tmr_func = 0;
3533                 break;
3534
3535         case QLA_TGT_ABORT_ALL_SESS:
3536                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3537                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3538                     sess->vha->vp_idx);
3539                 tmr_func = 0;
3540                 break;
3541
3542         case QLA_TGT_NEXUS_LOSS_SESS:
3543                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3544                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3545                     sess->vha->vp_idx);
3546                 tmr_func = 0;
3547                 break;
3548
3549         case QLA_TGT_NEXUS_LOSS:
3550                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3551                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3552                 tmr_func = 0;
3553                 break;
3554 #endif
3555         default:
3556                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3557                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3558                     sess->vha->vp_idx, fn);
3559                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3560                 return -ENOSYS;
3561         }
3562
3563         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3564         if (res != 0) {
3565                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3566                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3567                     sess->vha->vp_idx, res);
3568                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3569                 return -EFAULT;
3570         }
3571
3572         return 0;
3573 }
3574
3575 /* ha->hardware_lock supposed to be held on entry */
3576 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3577 {
3578         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3579         struct qla_hw_data *ha = vha->hw;
3580         struct qla_tgt *tgt;
3581         struct qla_tgt_sess *sess;
3582         uint32_t lun, unpacked_lun;
3583         int lun_size, fn;
3584
3585         tgt = vha->vha_tgt.qla_tgt;
3586
3587         lun = a->u.isp24.fcp_cmnd.lun;
3588         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3589         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3590         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3591             a->u.isp24.fcp_hdr.s_id);
3592         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3593
3594         if (!sess) {
3595                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3596                     "qla_target(%d): task mgmt fn 0x%x for "
3597                     "non-existant session\n", vha->vp_idx, fn);
3598                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3599                     sizeof(struct atio_from_isp));
3600         }
3601
3602         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3603 }
3604
3605 /* ha->hardware_lock supposed to be held on entry */
3606 static int __qlt_abort_task(struct scsi_qla_host *vha,
3607         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3608 {
3609         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3610         struct qla_hw_data *ha = vha->hw;
3611         struct qla_tgt_mgmt_cmd *mcmd;
3612         uint32_t lun, unpacked_lun;
3613         int rc;
3614
3615         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3616         if (mcmd == NULL) {
3617                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3618                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3619                     vha->vp_idx, __func__);
3620                 return -ENOMEM;
3621         }
3622         memset(mcmd, 0, sizeof(*mcmd));
3623
3624         mcmd->sess = sess;
3625         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3626             sizeof(mcmd->orig_iocb.imm_ntfy));
3627
3628         lun = a->u.isp24.fcp_cmnd.lun;
3629         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3630         mcmd->reset_count = vha->hw->chip_reset;
3631
3632         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3633             le16_to_cpu(iocb->u.isp2x.seq_id));
3634         if (rc != 0) {
3635                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3636                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3637                     vha->vp_idx, rc);
3638                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3639                 return -EFAULT;
3640         }
3641
3642         return 0;
3643 }
3644
3645 /* ha->hardware_lock supposed to be held on entry */
3646 static int qlt_abort_task(struct scsi_qla_host *vha,
3647         struct imm_ntfy_from_isp *iocb)
3648 {
3649         struct qla_hw_data *ha = vha->hw;
3650         struct qla_tgt_sess *sess;
3651         int loop_id;
3652
3653         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3654
3655         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3656         if (sess == NULL) {
3657                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3658                     "qla_target(%d): task abort for unexisting "
3659                     "session\n", vha->vp_idx);
3660                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3661                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3662         }
3663
3664         return __qlt_abort_task(vha, iocb, sess);
3665 }
3666
3667 /*
3668  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3669  */
3670 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3671         struct imm_ntfy_from_isp *iocb)
3672 {
3673         int res = 0;
3674
3675         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3676             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3677             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3678
3679         switch (iocb->u.isp24.status_subcode) {
3680         case ELS_PLOGI:
3681         case ELS_FLOGI:
3682         case ELS_PRLI:
3683         case ELS_LOGO:
3684         case ELS_PRLO:
3685                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3686                 break;
3687         case ELS_PDISC:
3688         case ELS_ADISC:
3689         {
3690                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3691                 if (tgt->link_reinit_iocb_pending) {
3692                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3693                             0, 0, 0, 0, 0, 0);
3694                         tgt->link_reinit_iocb_pending = 0;
3695                 }
3696                 res = 1; /* send notify ack */
3697                 break;
3698         }
3699
3700         default:
3701                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3702                     "qla_target(%d): Unsupported ELS command %x "
3703                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3704                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3705                 break;
3706         }
3707
3708         return res;
3709 }
3710
3711 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3712 {
3713 #if 1
3714         /*
3715          * FIXME: Reject non zero SRR relative offset until we can test
3716          * this code properly.
3717          */
3718         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3719         return -1;
3720 #else
3721         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3722         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3723         int i, sg_srr_cnt, bufflen = 0;
3724
3725         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3726             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3727             "cmd->sg_cnt: %u, direction: %d\n",
3728             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3729
3730         if (!cmd->sg || !cmd->sg_cnt) {
3731                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3732                     "Missing cmd->sg or zero cmd->sg_cnt in"
3733                     " qla_tgt_set_data_offset\n");
3734                 return -EINVAL;
3735         }
3736         /*
3737          * Walk the current cmd->sg list until we locate the new sg_srr_start
3738          */
3739         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3740                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3741                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3742                     i, sg, sg_page(sg), sg->length, sg->offset);
3743
3744                 if ((sg->length + tmp) > offset) {
3745                         first_offset = rem_offset;
3746                         sg_srr_start = sg;
3747                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3748                             "Found matching sg[%d], using %p as sg_srr_start, "
3749                             "and using first_offset: %zu\n", i, sg,
3750                             first_offset);
3751                         break;
3752                 }
3753                 tmp += sg->length;
3754                 rem_offset -= sg->length;
3755         }
3756
3757         if (!sg_srr_start) {
3758                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3759                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3760                 return -EINVAL;
3761         }
3762         sg_srr_cnt = (cmd->sg_cnt - i);
3763
3764         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3765         if (!sg_srr) {
3766                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3767                     "Unable to allocate sgp\n");
3768                 return -ENOMEM;
3769         }
3770         sg_init_table(sg_srr, sg_srr_cnt);
3771         sgp = &sg_srr[0];
3772         /*
3773          * Walk the remaining list for sg_srr_start, mapping to the newly
3774          * allocated sg_srr taking first_offset into account.
3775          */
3776         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3777                 if (first_offset) {
3778                         sg_set_page(sgp, sg_page(sg),
3779                             (sg->length - first_offset), first_offset);
3780                         first_offset = 0;
3781                 } else {
3782                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3783                 }
3784                 bufflen += sgp->length;
3785
3786                 sgp = sg_next(sgp);
3787                 if (!sgp)
3788                         break;
3789         }
3790
3791         cmd->sg = sg_srr;
3792         cmd->sg_cnt = sg_srr_cnt;
3793         cmd->bufflen = bufflen;
3794         cmd->offset += offset;
3795         cmd->free_sg = 1;
3796
3797         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3798         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3799             cmd->sg_cnt);
3800         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3801             cmd->bufflen);
3802         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3803             cmd->offset);
3804
3805         if (cmd->sg_cnt < 0)
3806                 BUG();
3807
3808         if (cmd->bufflen < 0)
3809                 BUG();
3810
3811         return 0;
3812 #endif
3813 }
3814
3815 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3816         uint32_t srr_rel_offs, int *xmit_type)
3817 {
3818         int res = 0, rel_offs;
3819
3820         rel_offs = srr_rel_offs - cmd->offset;
3821         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3822             srr_rel_offs, rel_offs);
3823
3824         *xmit_type = QLA_TGT_XMIT_ALL;
3825
3826         if (rel_offs < 0) {
3827                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3828                     "qla_target(%d): SRR rel_offs (%d) < 0",
3829                     cmd->vha->vp_idx, rel_offs);
3830                 res = -1;
3831         } else if (rel_offs == cmd->bufflen)
3832                 *xmit_type = QLA_TGT_XMIT_STATUS;
3833         else if (rel_offs > 0)
3834                 res = qlt_set_data_offset(cmd, rel_offs);
3835
3836         return res;
3837 }
3838
3839 /* No locks, thread context */
3840 static void qlt_handle_srr(struct scsi_qla_host *vha,
3841         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3842 {
3843         struct imm_ntfy_from_isp *ntfy =
3844             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3845         struct qla_hw_data *ha = vha->hw;
3846         struct qla_tgt_cmd *cmd = sctio->cmd;
3847         struct se_cmd *se_cmd = &cmd->se_cmd;
3848         unsigned long flags;
3849         int xmit_type = 0, resp = 0;
3850         uint32_t offset;
3851         uint16_t srr_ui;
3852
3853         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3854         srr_ui = ntfy->u.isp24.srr_ui;
3855
3856         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3857             cmd, srr_ui);
3858
3859         switch (srr_ui) {
3860         case SRR_IU_STATUS:
3861                 spin_lock_irqsave(&ha->hardware_lock, flags);
3862                 qlt_send_notify_ack(vha, ntfy,
3863                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3864                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3865                 xmit_type = QLA_TGT_XMIT_STATUS;
3866                 resp = 1;
3867                 break;
3868         case SRR_IU_DATA_IN:
3869                 if (!cmd->sg || !cmd->sg_cnt) {
3870                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3871                             "Unable to process SRR_IU_DATA_IN due to"
3872                             " missing cmd->sg, state: %d\n", cmd->state);
3873                         dump_stack();
3874                         goto out_reject;
3875                 }
3876                 if (se_cmd->scsi_status != 0) {
3877                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3878                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3879                             "scsi_status\n");
3880                         goto out_reject;
3881                 }
3882                 cmd->bufflen = se_cmd->data_length;
3883
3884                 if (qlt_has_data(cmd)) {
3885                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3886                                 goto out_reject;
3887                         spin_lock_irqsave(&ha->hardware_lock, flags);
3888                         qlt_send_notify_ack(vha, ntfy,
3889                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3890                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3891                         resp = 1;
3892                 } else {
3893                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3894                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
3895                                vha->vp_idx, se_cmd->tag,
3896                             cmd->se_cmd.scsi_status);
3897                         goto out_reject;
3898                 }
3899                 break;
3900         case SRR_IU_DATA_OUT:
3901                 if (!cmd->sg || !cmd->sg_cnt) {
3902                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3903                             "Unable to process SRR_IU_DATA_OUT due to"
3904                             " missing cmd->sg\n");
3905                         dump_stack();
3906                         goto out_reject;
3907                 }
3908                 if (se_cmd->scsi_status != 0) {
3909                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3910                             "Rejecting SRR_IU_DATA_OUT"
3911                             " with non GOOD scsi_status\n");
3912                         goto out_reject;
3913                 }
3914                 cmd->bufflen = se_cmd->data_length;
3915
3916                 if (qlt_has_data(cmd)) {
3917                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3918                                 goto out_reject;
3919                         spin_lock_irqsave(&ha->hardware_lock, flags);
3920                         qlt_send_notify_ack(vha, ntfy,
3921                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3922                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3923                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3924                                 cmd->cmd_flags |= BIT_8;
3925                                 qlt_rdy_to_xfer(cmd);
3926                         }
3927                 } else {
3928                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3929                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
3930                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
3931                         goto out_reject;
3932                 }
3933                 break;
3934         default:
3935                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3936                     "qla_target(%d): Unknown srr_ui value %x",
3937                     vha->vp_idx, srr_ui);
3938                 goto out_reject;
3939         }
3940
3941         /* Transmit response in case of status and data-in cases */
3942         if (resp) {
3943                 cmd->cmd_flags |= BIT_7;
3944                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3945         }
3946
3947         return;
3948
3949 out_reject:
3950         spin_lock_irqsave(&ha->hardware_lock, flags);
3951         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3952             NOTIFY_ACK_SRR_FLAGS_REJECT,
3953             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3954             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3955         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3956                 cmd->state = QLA_TGT_STATE_DATA_IN;
3957                 dump_stack();
3958         } else {
3959                 cmd->cmd_flags |= BIT_9;
3960                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3961         }
3962         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3963 }
3964
3965 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3966         struct qla_tgt_srr_imm *imm, int ha_locked)
3967 {
3968         struct qla_hw_data *ha = vha->hw;
3969         unsigned long flags = 0;
3970
3971         if (!ha_locked)
3972                 spin_lock_irqsave(&ha->hardware_lock, flags);
3973
3974         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3975             NOTIFY_ACK_SRR_FLAGS_REJECT,
3976             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3977             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3978
3979         if (!ha_locked)
3980                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3981
3982         kfree(imm);
3983 }
3984
3985 static void qlt_handle_srr_work(struct work_struct *work)
3986 {
3987         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3988         struct scsi_qla_host *vha = tgt->vha;
3989         struct qla_tgt_srr_ctio *sctio;
3990         unsigned long flags;
3991
3992         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3993             tgt);
3994
3995 restart:
3996         spin_lock_irqsave(&tgt->srr_lock, flags);
3997         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3998                 struct qla_tgt_srr_imm *imm, *i, *ti;
3999                 struct qla_tgt_cmd *cmd;
4000                 struct se_cmd *se_cmd;
4001
4002                 imm = NULL;
4003                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4004                                                 srr_list_entry) {
4005                         if (i->srr_id == sctio->srr_id) {
4006                                 list_del(&i->srr_list_entry);
4007                                 if (imm) {
4008                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4009                                           "qla_target(%d): There must be "
4010                                           "only one IMM SRR per CTIO SRR "
4011                                           "(IMM SRR %p, id %d, CTIO %p\n",
4012                                           vha->vp_idx, i, i->srr_id, sctio);
4013                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4014                                 } else
4015                                         imm = i;
4016                         }
4017                 }
4018
4019                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4020                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4021                     sctio->srr_id);
4022
4023                 if (imm == NULL) {
4024                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4025                             "Not found matching IMM for SRR CTIO (id %d)\n",
4026                             sctio->srr_id);
4027                         continue;
4028                 } else
4029                         list_del(&sctio->srr_list_entry);
4030
4031                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4032
4033                 cmd = sctio->cmd;
4034                 /*
4035                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4036                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4037                  * logic..
4038                  */
4039                 cmd->offset = 0;
4040                 if (cmd->free_sg) {
4041                         kfree(cmd->sg);
4042                         cmd->sg = NULL;
4043                         cmd->free_sg = 0;
4044                 }
4045                 se_cmd = &cmd->se_cmd;
4046
4047                 cmd->sg_cnt = se_cmd->t_data_nents;
4048                 cmd->sg = se_cmd->t_data_sg;
4049
4050                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4051                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4052                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4053                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4054
4055                 qlt_handle_srr(vha, sctio, imm);
4056
4057                 kfree(imm);
4058                 kfree(sctio);
4059                 goto restart;
4060         }
4061         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4062 }
4063
4064 /* ha->hardware_lock supposed to be held on entry */
4065 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4066         struct imm_ntfy_from_isp *iocb)
4067 {
4068         struct qla_tgt_srr_imm *imm;
4069         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4070         struct qla_tgt_srr_ctio *sctio;
4071
4072         tgt->imm_srr_id++;
4073
4074         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4075             vha->vp_idx);
4076
4077         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4078         if (imm != NULL) {
4079                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4080
4081                 /* IRQ is already OFF */
4082                 spin_lock(&tgt->srr_lock);
4083                 imm->srr_id = tgt->imm_srr_id;
4084                 list_add_tail(&imm->srr_list_entry,
4085                     &tgt->srr_imm_list);
4086                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4087                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4088                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4089                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4090                         int found = 0;
4091                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4092                             srr_list_entry) {
4093                                 if (sctio->srr_id == imm->srr_id) {
4094                                         found = 1;
4095                                         break;
4096                                 }
4097                         }
4098                         if (found) {
4099                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4100                                     "Scheduling srr work\n");
4101                                 schedule_work(&tgt->srr_work);
4102                         } else {
4103                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4104                                     "qla_target(%d): imm_srr_id "
4105                                     "== ctio_srr_id (%d), but there is no "
4106                                     "corresponding SRR CTIO, deleting IMM "
4107                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4108                                     imm);
4109                                 list_del(&imm->srr_list_entry);
4110
4111                                 kfree(imm);
4112
4113                                 spin_unlock(&tgt->srr_lock);
4114                                 goto out_reject;
4115                         }
4116                 }
4117                 spin_unlock(&tgt->srr_lock);
4118         } else {
4119                 struct qla_tgt_srr_ctio *ts;
4120
4121                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4122                     "qla_target(%d): Unable to allocate SRR IMM "
4123                     "entry, SRR request will be rejected\n", vha->vp_idx);
4124
4125                 /* IRQ is already OFF */
4126                 spin_lock(&tgt->srr_lock);
4127                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4128                     srr_list_entry) {
4129                         if (sctio->srr_id == tgt->imm_srr_id) {
4130                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4131                                     "CTIO SRR %p deleted (id %d)\n",
4132                                     sctio, sctio->srr_id);
4133                                 list_del(&sctio->srr_list_entry);
4134                                 qlt_send_term_exchange(vha, sctio->cmd,
4135                                     &sctio->cmd->atio, 1);
4136                                 kfree(sctio);
4137                         }
4138                 }
4139                 spin_unlock(&tgt->srr_lock);
4140                 goto out_reject;
4141         }
4142
4143         return;
4144
4145 out_reject:
4146         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4147             NOTIFY_ACK_SRR_FLAGS_REJECT,
4148             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4149             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4150 }
4151
4152 /*
4153  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4154  */
4155 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4156         struct imm_ntfy_from_isp *iocb)
4157 {
4158         struct qla_hw_data *ha = vha->hw;
4159         uint32_t add_flags = 0;
4160         int send_notify_ack = 1;
4161         uint16_t status;
4162
4163         status = le16_to_cpu(iocb->u.isp2x.status);
4164         switch (status) {
4165         case IMM_NTFY_LIP_RESET:
4166         {
4167                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4168                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4169                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4170                     iocb->u.isp24.status_subcode);
4171
4172                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4173                         send_notify_ack = 0;
4174                 break;
4175         }
4176
4177         case IMM_NTFY_LIP_LINK_REINIT:
4178         {
4179                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4180                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4181                     "qla_target(%d): LINK REINIT (loop %#x, "
4182                     "subcode %x)\n", vha->vp_idx,
4183                     le16_to_cpu(iocb->u.isp24.nport_handle),
4184                     iocb->u.isp24.status_subcode);
4185                 if (tgt->link_reinit_iocb_pending) {
4186                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4187                             0, 0, 0, 0, 0, 0);
4188                 }
4189                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4190                 tgt->link_reinit_iocb_pending = 1;
4191                 /*
4192                  * QLogic requires to wait after LINK REINIT for possible
4193                  * PDISC or ADISC ELS commands
4194                  */
4195                 send_notify_ack = 0;
4196                 break;
4197         }
4198
4199         case IMM_NTFY_PORT_LOGOUT:
4200                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4201                     "qla_target(%d): Port logout (loop "
4202                     "%#x, subcode %x)\n", vha->vp_idx,
4203                     le16_to_cpu(iocb->u.isp24.nport_handle),
4204                     iocb->u.isp24.status_subcode);
4205
4206                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4207                         send_notify_ack = 0;
4208                 /* The sessions will be cleared in the callback, if needed */
4209                 break;
4210
4211         case IMM_NTFY_GLBL_TPRLO:
4212                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4213                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4214                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4215                         send_notify_ack = 0;
4216                 /* The sessions will be cleared in the callback, if needed */
4217                 break;
4218
4219         case IMM_NTFY_PORT_CONFIG:
4220                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4221                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4222                     status);
4223                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4224                         send_notify_ack = 0;
4225                 /* The sessions will be cleared in the callback, if needed */
4226                 break;
4227
4228         case IMM_NTFY_GLBL_LOGO:
4229                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4230                     "qla_target(%d): Link failure detected\n",
4231                     vha->vp_idx);
4232                 /* I_T nexus loss */
4233                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4234                         send_notify_ack = 0;
4235                 break;
4236
4237         case IMM_NTFY_IOCB_OVERFLOW:
4238                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4239                     "qla_target(%d): Cannot provide requested "
4240                     "capability (IOCB overflowed the immediate notify "
4241                     "resource count)\n", vha->vp_idx);
4242                 break;
4243
4244         case IMM_NTFY_ABORT_TASK:
4245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4246                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4247                     "L %#x)\n", vha->vp_idx,
4248                     le16_to_cpu(iocb->u.isp2x.seq_id),
4249                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4250                     le16_to_cpu(iocb->u.isp2x.lun));
4251                 if (qlt_abort_task(vha, iocb) == 0)
4252                         send_notify_ack = 0;
4253                 break;
4254
4255         case IMM_NTFY_RESOURCE:
4256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4257                     "qla_target(%d): Out of resources, host %ld\n",
4258                     vha->vp_idx, vha->host_no);
4259                 break;
4260
4261         case IMM_NTFY_MSG_RX:
4262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4263                     "qla_target(%d): Immediate notify task %x\n",
4264                     vha->vp_idx, iocb->u.isp2x.task_flags);
4265                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4266                         send_notify_ack = 0;
4267                 break;
4268
4269         case IMM_NTFY_ELS:
4270                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4271                         send_notify_ack = 0;
4272                 break;
4273
4274         case IMM_NTFY_SRR:
4275                 qlt_prepare_srr_imm(vha, iocb);
4276                 send_notify_ack = 0;
4277                 break;
4278
4279         default:
4280                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4281                     "qla_target(%d): Received unknown immediate "
4282                     "notify status %x\n", vha->vp_idx, status);
4283                 break;
4284         }
4285
4286         if (send_notify_ack)
4287                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4288 }
4289
4290 /*
4291  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4292  * This function sends busy to ISP 2xxx or 24xx.
4293  */
4294 static int __qlt_send_busy(struct scsi_qla_host *vha,
4295         struct atio_from_isp *atio, uint16_t status)
4296 {
4297         struct ctio7_to_24xx *ctio24;
4298         struct qla_hw_data *ha = vha->hw;
4299         request_t *pkt;
4300         struct qla_tgt_sess *sess = NULL;
4301
4302         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4303             atio->u.isp24.fcp_hdr.s_id);
4304         if (!sess) {
4305                 qlt_send_term_exchange(vha, NULL, atio, 1);
4306                 return 0;
4307         }
4308         /* Sending marker isn't necessary, since we called from ISR */
4309
4310         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4311         if (!pkt) {
4312                 ql_dbg(ql_dbg_io, vha, 0x3063,
4313                     "qla_target(%d): %s failed: unable to allocate "
4314                     "request packet", vha->vp_idx, __func__);
4315                 return -ENOMEM;
4316         }
4317
4318         pkt->entry_count = 1;
4319         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4320
4321         ctio24 = (struct ctio7_to_24xx *)pkt;
4322         ctio24->entry_type = CTIO_TYPE7;
4323         ctio24->nport_handle = sess->loop_id;
4324         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4325         ctio24->vp_index = vha->vp_idx;
4326         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4327         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4328         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4329         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4330         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4331             __constant_cpu_to_le16(
4332                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4333                 CTIO7_FLAGS_DONT_RET_CTIO);
4334         /*
4335          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4336          * if the explicit conformation is used.
4337          */
4338         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4339         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4340         /* Memory Barrier */
4341         wmb();
4342         qla2x00_start_iocbs(vha, vha->req);
4343         return 0;
4344 }
4345
4346 /*
4347  * This routine is used to allocate a command for either a QFull condition
4348  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4349  * out previously.
4350  */
4351 static void
4352 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4353         struct atio_from_isp *atio, uint16_t status, int qfull)
4354 {
4355         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4356         struct qla_hw_data *ha = vha->hw;
4357         struct qla_tgt_sess *sess;
4358         struct se_session *se_sess;
4359         struct qla_tgt_cmd *cmd;
4360         int tag;
4361
4362         if (unlikely(tgt->tgt_stop)) {
4363                 ql_dbg(ql_dbg_io, vha, 0x300a,
4364                         "New command while device %p is shutting down\n", tgt);
4365                 return;
4366         }
4367
4368         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4369                 vha->hw->tgt.num_qfull_cmds_dropped++;
4370                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4371                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4372                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4373                                 vha->hw->tgt.num_qfull_cmds_dropped;
4374
4375                 ql_dbg(ql_dbg_io, vha, 0x3068,
4376                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4377                         vha->vp_idx, __func__,
4378                         vha->hw->tgt.num_qfull_cmds_dropped);
4379
4380                 qlt_chk_exch_leak_thresh_hold(vha);
4381                 return;
4382         }
4383
4384         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4385                 (vha, atio->u.isp24.fcp_hdr.s_id);
4386         if (!sess)
4387                 return;
4388
4389         se_sess = sess->se_sess;
4390
4391         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4392         if (tag < 0)
4393                 return;
4394
4395         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4396         if (!cmd) {
4397                 ql_dbg(ql_dbg_io, vha, 0x3009,
4398                         "qla_target(%d): %s: Allocation of cmd failed\n",
4399                         vha->vp_idx, __func__);
4400
4401                 vha->hw->tgt.num_qfull_cmds_dropped++;
4402                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4403                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4404                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4405                                 vha->hw->tgt.num_qfull_cmds_dropped;
4406
4407                 qlt_chk_exch_leak_thresh_hold(vha);
4408                 return;
4409         }
4410
4411         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4412
4413         qlt_incr_num_pend_cmds(vha);
4414         INIT_LIST_HEAD(&cmd->cmd_list);
4415         memcpy(&cmd->atio, atio, sizeof(*atio));
4416
4417         cmd->tgt = vha->vha_tgt.qla_tgt;
4418         cmd->vha = vha;
4419         cmd->reset_count = vha->hw->chip_reset;
4420         cmd->q_full = 1;
4421
4422         if (qfull) {
4423                 cmd->q_full = 1;
4424                 /* NOTE: borrowing the state field to carry the status */
4425                 cmd->state = status;
4426         } else
4427                 cmd->term_exchg = 1;
4428
4429         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4430
4431         vha->hw->tgt.num_qfull_cmds_alloc++;
4432         if (vha->hw->tgt.num_qfull_cmds_alloc >
4433                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4434                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4435                         vha->hw->tgt.num_qfull_cmds_alloc;
4436 }
4437
4438 int
4439 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4440 {
4441         struct qla_hw_data *ha = vha->hw;
4442         unsigned long flags;
4443         struct qla_tgt_cmd *cmd, *tcmd;
4444         struct list_head free_list;
4445         int rc = 0;
4446
4447         if (list_empty(&ha->tgt.q_full_list))
4448                 return 0;
4449
4450         INIT_LIST_HEAD(&free_list);
4451
4452         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4453
4454         if (list_empty(&ha->tgt.q_full_list)) {
4455                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4456                 return 0;
4457         }
4458
4459         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4460                 if (cmd->q_full)
4461                         /* cmd->state is a borrowed field to hold status */
4462                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4463                 else if (cmd->term_exchg)
4464                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4465
4466                 if (rc == -ENOMEM)
4467                         break;
4468
4469                 if (cmd->q_full)
4470                         ql_dbg(ql_dbg_io, vha, 0x3006,
4471                             "%s: busy sent for ox_id[%04x]\n", __func__,
4472                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4473                 else if (cmd->term_exchg)
4474                         ql_dbg(ql_dbg_io, vha, 0x3007,
4475                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4476                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4477                 else
4478                         ql_dbg(ql_dbg_io, vha, 0x3008,
4479                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4480                             cmd);
4481
4482                 list_del(&cmd->cmd_list);
4483                 list_add_tail(&cmd->cmd_list, &free_list);
4484
4485                 /* piggy back on hardware_lock for protection */
4486                 vha->hw->tgt.num_qfull_cmds_alloc--;
4487         }
4488         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4489
4490         cmd = NULL;
4491
4492         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4493                 list_del(&cmd->cmd_list);
4494                 /* This cmd was never sent to TCM.  There is no need
4495                  * to schedule free or call free_cmd
4496                  */
4497                 qlt_free_cmd(cmd);
4498         }
4499         return rc;
4500 }
4501
4502 static void
4503 qlt_send_busy(struct scsi_qla_host *vha,
4504         struct atio_from_isp *atio, uint16_t status)
4505 {
4506         int rc = 0;
4507
4508         rc = __qlt_send_busy(vha, atio, status);
4509         if (rc == -ENOMEM)
4510                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4511 }
4512
4513 static int
4514 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4515         struct atio_from_isp *atio)
4516 {
4517         struct qla_hw_data *ha = vha->hw;
4518         uint16_t status;
4519
4520         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4521                 return 0;
4522
4523         status = temp_sam_status;
4524         qlt_send_busy(vha, atio, status);
4525         return 1;
4526 }
4527
4528 /* ha->hardware_lock supposed to be held on entry */
4529 /* called via callback from qla2xxx */
4530 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4531         struct atio_from_isp *atio)
4532 {
4533         struct qla_hw_data *ha = vha->hw;
4534         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4535         int rc;
4536
4537         if (unlikely(tgt == NULL)) {
4538                 ql_dbg(ql_dbg_io, vha, 0x3064,
4539                     "ATIO pkt, but no tgt (ha %p)", ha);
4540                 return;
4541         }
4542         /*
4543          * In tgt_stop mode we also should allow all requests to pass.
4544          * Otherwise, some commands can stuck.
4545          */
4546
4547         tgt->irq_cmd_count++;
4548
4549         switch (atio->u.raw.entry_type) {
4550         case ATIO_TYPE7:
4551                 if (unlikely(atio->u.isp24.exchange_addr ==
4552                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4553                         ql_dbg(ql_dbg_io, vha, 0x3065,
4554                             "qla_target(%d): ATIO_TYPE7 "
4555                             "received with UNKNOWN exchange address, "
4556                             "sending QUEUE_FULL\n", vha->vp_idx);
4557                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4558                         break;
4559                 }
4560
4561
4562
4563                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4564                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4565                         if (rc != 0) {
4566                                 tgt->irq_cmd_count--;
4567                                 return;
4568                         }
4569                         rc = qlt_handle_cmd_for_atio(vha, atio);
4570                 } else {
4571                         rc = qlt_handle_task_mgmt(vha, atio);
4572                 }
4573                 if (unlikely(rc != 0)) {
4574                         if (rc == -ESRCH) {
4575 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4576                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4577 #else
4578                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4579 #endif
4580                         } else {
4581                                 if (tgt->tgt_stop) {
4582                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4583                                             "qla_target: Unable to send "
4584                                             "command to target for req, "
4585                                             "ignoring.\n");
4586                                 } else {
4587                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4588                                             "qla_target(%d): Unable to send "
4589                                             "command to target, sending BUSY "
4590                                             "status.\n", vha->vp_idx);
4591                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4592                                 }
4593                         }
4594                 }
4595                 break;
4596
4597         case IMMED_NOTIFY_TYPE:
4598         {
4599                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4600                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4601                             "qla_target(%d): Received ATIO packet %x "
4602                             "with error status %x\n", vha->vp_idx,
4603                             atio->u.raw.entry_type,
4604                             atio->u.isp2x.entry_status);
4605                         break;
4606                 }
4607                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4608                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4609                 break;
4610         }
4611
4612         default:
4613                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4614                     "qla_target(%d): Received unknown ATIO atio "
4615                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4616                 break;
4617         }
4618
4619         tgt->irq_cmd_count--;
4620 }
4621
4622 /* ha->hardware_lock supposed to be held on entry */
4623 /* called via callback from qla2xxx */
4624 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4625 {
4626         struct qla_hw_data *ha = vha->hw;
4627         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4628
4629         if (unlikely(tgt == NULL)) {
4630                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4631                     "qla_target(%d): Response pkt %x received, but no "
4632                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4633                 return;
4634         }
4635
4636         /*
4637          * In tgt_stop mode we also should allow all requests to pass.
4638          * Otherwise, some commands can stuck.
4639          */
4640
4641         tgt->irq_cmd_count++;
4642
4643         switch (pkt->entry_type) {
4644         case CTIO_CRC2:
4645         case CTIO_TYPE7:
4646         {
4647                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4648                 qlt_do_ctio_completion(vha, entry->handle,
4649                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4650                     entry);
4651                 break;
4652         }
4653
4654         case ACCEPT_TGT_IO_TYPE:
4655         {
4656                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4657                 int rc;
4658                 if (atio->u.isp2x.status !=
4659                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4660                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4661                             "qla_target(%d): ATIO with error "
4662                             "status %x received\n", vha->vp_idx,
4663                             le16_to_cpu(atio->u.isp2x.status));
4664                         break;
4665                 }
4666
4667                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4668                 if (rc != 0) {
4669                         tgt->irq_cmd_count--;
4670                         return;
4671                 }
4672
4673                 rc = qlt_handle_cmd_for_atio(vha, atio);
4674                 if (unlikely(rc != 0)) {
4675                         if (rc == -ESRCH) {
4676 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4677                                 qlt_send_busy(vha, atio, 0);
4678 #else
4679                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4680 #endif
4681                         } else {
4682                                 if (tgt->tgt_stop) {
4683                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4684                                             "qla_target: Unable to send "
4685                                             "command to target, sending TERM "
4686                                             "EXCHANGE for rsp\n");
4687                                         qlt_send_term_exchange(vha, NULL,
4688                                             atio, 1);
4689                                 } else {
4690                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4691                                             "qla_target(%d): Unable to send "
4692                                             "command to target, sending BUSY "
4693                                             "status\n", vha->vp_idx);
4694                                         qlt_send_busy(vha, atio, 0);
4695                                 }
4696                         }
4697                 }
4698         }
4699         break;
4700
4701         case CONTINUE_TGT_IO_TYPE:
4702         {
4703                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4704                 qlt_do_ctio_completion(vha, entry->handle,
4705                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4706                     entry);
4707                 break;
4708         }
4709
4710         case CTIO_A64_TYPE:
4711         {
4712                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4713                 qlt_do_ctio_completion(vha, entry->handle,
4714                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4715                     entry);
4716                 break;
4717         }
4718
4719         case IMMED_NOTIFY_TYPE:
4720                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4721                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4722                 break;
4723
4724         case NOTIFY_ACK_TYPE:
4725                 if (tgt->notify_ack_expected > 0) {
4726                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4727                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4728                             "NOTIFY_ACK seq %08x status %x\n",
4729                             le16_to_cpu(entry->u.isp2x.seq_id),
4730                             le16_to_cpu(entry->u.isp2x.status));
4731                         tgt->notify_ack_expected--;
4732                         if (entry->u.isp2x.status !=
4733                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4734                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4735                                     "qla_target(%d): NOTIFY_ACK "
4736                                     "failed %x\n", vha->vp_idx,
4737                                     le16_to_cpu(entry->u.isp2x.status));
4738                         }
4739                 } else {
4740                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4741                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4742                             vha->vp_idx);
4743                 }
4744                 break;
4745
4746         case ABTS_RECV_24XX:
4747                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4748                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4749                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4750                 break;
4751
4752         case ABTS_RESP_24XX:
4753                 if (tgt->abts_resp_expected > 0) {
4754                         struct abts_resp_from_24xx_fw *entry =
4755                                 (struct abts_resp_from_24xx_fw *)pkt;
4756                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4757                             "ABTS_RESP_24XX: compl_status %x\n",
4758                             entry->compl_status);
4759                         tgt->abts_resp_expected--;
4760                         if (le16_to_cpu(entry->compl_status) !=
4761                             ABTS_RESP_COMPL_SUCCESS) {
4762                                 if ((entry->error_subcode1 == 0x1E) &&
4763                                     (entry->error_subcode2 == 0)) {
4764                                         /*
4765                                          * We've got a race here: aborted
4766                                          * exchange not terminated, i.e.
4767                                          * response for the aborted command was
4768                                          * sent between the abort request was
4769                                          * received and processed.
4770                                          * Unfortunately, the firmware has a
4771                                          * silly requirement that all aborted
4772                                          * exchanges must be explicitely
4773                                          * terminated, otherwise it refuses to
4774                                          * send responses for the abort
4775                                          * requests. So, we have to
4776                                          * (re)terminate the exchange and retry
4777                                          * the abort response.
4778                                          */
4779                                         qlt_24xx_retry_term_exchange(vha,
4780                                             entry);
4781                                 } else
4782                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4783                                             "qla_target(%d): ABTS_RESP_24XX "
4784                                             "failed %x (subcode %x:%x)",
4785                                             vha->vp_idx, entry->compl_status,
4786                                             entry->error_subcode1,
4787                                             entry->error_subcode2);
4788                         }
4789                 } else {
4790                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4791                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4792                             "received\n", vha->vp_idx);
4793                 }
4794                 break;
4795
4796         default:
4797                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4798                     "qla_target(%d): Received unknown response pkt "
4799                     "type %x\n", vha->vp_idx, pkt->entry_type);
4800                 break;
4801         }
4802
4803         tgt->irq_cmd_count--;
4804 }
4805
4806 /*
4807  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4808  */
4809 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4810         uint16_t *mailbox)
4811 {
4812         struct qla_hw_data *ha = vha->hw;
4813         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4814         int login_code;
4815
4816         if (!ha->tgt.tgt_ops)
4817                 return;
4818
4819         if (unlikely(tgt == NULL)) {
4820                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4821                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4822                 return;
4823         }
4824
4825         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4826             IS_QLA2100(ha))
4827                 return;
4828         /*
4829          * In tgt_stop mode we also should allow all requests to pass.
4830          * Otherwise, some commands can stuck.
4831          */
4832
4833         tgt->irq_cmd_count++;
4834
4835         switch (code) {
4836         case MBA_RESET:                 /* Reset */
4837         case MBA_SYSTEM_ERR:            /* System Error */
4838         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4839         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4840                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4841                     "qla_target(%d): System error async event %#x "
4842                     "occurred", vha->vp_idx, code);
4843                 break;
4844         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4845                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4846                 break;
4847
4848         case MBA_LOOP_UP:
4849         {
4850                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4851                     "qla_target(%d): Async LOOP_UP occurred "
4852                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4853                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4854                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4855                 if (tgt->link_reinit_iocb_pending) {
4856                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4857                             0, 0, 0, 0, 0, 0);
4858                         tgt->link_reinit_iocb_pending = 0;
4859                 }
4860                 break;
4861         }
4862
4863         case MBA_LIP_OCCURRED:
4864         case MBA_LOOP_DOWN:
4865         case MBA_LIP_RESET:
4866         case MBA_RSCN_UPDATE:
4867                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4868                     "qla_target(%d): Async event %#x occurred "
4869                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4870                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4871                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4872                 break;
4873
4874         case MBA_PORT_UPDATE:
4875                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4876                     "qla_target(%d): Port update async event %#x "
4877                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4878                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4879                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4880                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4881
4882                 login_code = le16_to_cpu(mailbox[2]);
4883                 if (login_code == 0x4)
4884                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4885                             "Async MB 2: Got PLOGI Complete\n");
4886                 else if (login_code == 0x7)
4887                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4888                             "Async MB 2: Port Logged Out\n");
4889                 break;
4890
4891         default:
4892                 break;
4893         }
4894
4895         tgt->irq_cmd_count--;
4896 }
4897
4898 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4899         uint16_t loop_id)
4900 {
4901         fc_port_t *fcport;
4902         int rc;
4903
4904         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4905         if (!fcport) {
4906                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4907                     "qla_target(%d): Allocation of tmp FC port failed",
4908                     vha->vp_idx);
4909                 return NULL;
4910         }
4911
4912         fcport->loop_id = loop_id;
4913
4914         rc = qla2x00_get_port_database(vha, fcport, 0);
4915         if (rc != QLA_SUCCESS) {
4916                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4917                     "qla_target(%d): Failed to retrieve fcport "
4918                     "information -- get_port_database() returned %x "
4919                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4920                 kfree(fcport);
4921                 return NULL;
4922         }
4923
4924         return fcport;
4925 }
4926
4927 /* Must be called under tgt_mutex */
4928 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4929         uint8_t *s_id)
4930 {
4931         struct qla_tgt_sess *sess = NULL;
4932         fc_port_t *fcport = NULL;
4933         int rc, global_resets;
4934         uint16_t loop_id = 0;
4935
4936 retry:
4937         global_resets =
4938             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4939
4940         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4941         if (rc != 0) {
4942                 if ((s_id[0] == 0xFF) &&
4943                     (s_id[1] == 0xFC)) {
4944                         /*
4945                          * This is Domain Controller, so it should be
4946                          * OK to drop SCSI commands from it.
4947                          */
4948                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4949                             "Unable to find initiator with S_ID %x:%x:%x",
4950                             s_id[0], s_id[1], s_id[2]);
4951                 } else
4952                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4953                             "qla_target(%d): Unable to find "
4954                             "initiator with S_ID %x:%x:%x",
4955                             vha->vp_idx, s_id[0], s_id[1],
4956                             s_id[2]);
4957                 return NULL;
4958         }
4959
4960         fcport = qlt_get_port_database(vha, loop_id);
4961         if (!fcport)
4962                 return NULL;
4963
4964         if (global_resets !=
4965             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4966                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4967                     "qla_target(%d): global reset during session discovery "
4968                     "(counter was %d, new %d), retrying", vha->vp_idx,
4969                     global_resets,
4970                     atomic_read(&vha->vha_tgt.
4971                         qla_tgt->tgt_global_resets_count));
4972                 goto retry;
4973         }
4974
4975         sess = qlt_create_sess(vha, fcport, true);
4976
4977         kfree(fcport);
4978         return sess;
4979 }
4980
4981 static void qlt_abort_work(struct qla_tgt *tgt,
4982         struct qla_tgt_sess_work_param *prm)
4983 {
4984         struct scsi_qla_host *vha = tgt->vha;
4985         struct qla_hw_data *ha = vha->hw;
4986         struct qla_tgt_sess *sess = NULL;
4987         unsigned long flags;
4988         uint32_t be_s_id;
4989         uint8_t s_id[3];
4990         int rc;
4991
4992         spin_lock_irqsave(&ha->hardware_lock, flags);
4993
4994         if (tgt->tgt_stop)
4995                 goto out_term;
4996
4997         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4998         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4999         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5000
5001         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5002             (unsigned char *)&be_s_id);
5003         if (!sess) {
5004                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5005
5006                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5007                 sess = qlt_make_local_sess(vha, s_id);
5008                 /* sess has got an extra creation ref */
5009                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5010
5011                 spin_lock_irqsave(&ha->hardware_lock, flags);
5012                 if (!sess)
5013                         goto out_term;
5014         } else {
5015                 kref_get(&sess->se_sess->sess_kref);
5016         }
5017
5018         if (tgt->tgt_stop)
5019                 goto out_term;
5020
5021         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5022         if (rc != 0)
5023                 goto out_term;
5024
5025         ha->tgt.tgt_ops->put_sess(sess);
5026         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5027         return;
5028
5029 out_term:
5030         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5031         if (sess)
5032                 ha->tgt.tgt_ops->put_sess(sess);
5033         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5034 }
5035
5036 static void qlt_tmr_work(struct qla_tgt *tgt,
5037         struct qla_tgt_sess_work_param *prm)
5038 {
5039         struct atio_from_isp *a = &prm->tm_iocb2;
5040         struct scsi_qla_host *vha = tgt->vha;
5041         struct qla_hw_data *ha = vha->hw;
5042         struct qla_tgt_sess *sess = NULL;
5043         unsigned long flags;
5044         uint8_t *s_id = NULL; /* to hide compiler warnings */
5045         int rc;
5046         uint32_t lun, unpacked_lun;
5047         int lun_size, fn;
5048         void *iocb;
5049
5050         spin_lock_irqsave(&ha->hardware_lock, flags);
5051
5052         if (tgt->tgt_stop)
5053                 goto out_term;
5054
5055         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5056         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5057         if (!sess) {
5058                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5059
5060                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5061                 sess = qlt_make_local_sess(vha, s_id);
5062                 /* sess has got an extra creation ref */
5063                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5064
5065                 spin_lock_irqsave(&ha->hardware_lock, flags);
5066                 if (!sess)
5067                         goto out_term;
5068         } else {
5069                 kref_get(&sess->se_sess->sess_kref);
5070         }
5071
5072         iocb = a;
5073         lun = a->u.isp24.fcp_cmnd.lun;
5074         lun_size = sizeof(lun);
5075         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5076         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5077
5078         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5079         if (rc != 0)
5080                 goto out_term;
5081
5082         ha->tgt.tgt_ops->put_sess(sess);
5083         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5084         return;
5085
5086 out_term:
5087         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5088         if (sess)
5089                 ha->tgt.tgt_ops->put_sess(sess);
5090         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5091 }
5092
5093 static void qlt_sess_work_fn(struct work_struct *work)
5094 {
5095         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5096         struct scsi_qla_host *vha = tgt->vha;
5097         unsigned long flags;
5098
5099         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5100
5101         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5102         while (!list_empty(&tgt->sess_works_list)) {
5103                 struct qla_tgt_sess_work_param *prm = list_entry(
5104                     tgt->sess_works_list.next, typeof(*prm),
5105                     sess_works_list_entry);
5106
5107                 /*
5108                  * This work can be scheduled on several CPUs at time, so we
5109                  * must delete the entry to eliminate double processing
5110                  */
5111                 list_del(&prm->sess_works_list_entry);
5112
5113                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5114
5115                 switch (prm->type) {
5116                 case QLA_TGT_SESS_WORK_ABORT:
5117                         qlt_abort_work(tgt, prm);
5118                         break;
5119                 case QLA_TGT_SESS_WORK_TM:
5120                         qlt_tmr_work(tgt, prm);
5121                         break;
5122                 default:
5123                         BUG_ON(1);
5124                         break;
5125                 }
5126
5127                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5128
5129                 kfree(prm);
5130         }
5131         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5132 }
5133
5134 /* Must be called under tgt_host_action_mutex */
5135 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5136 {
5137         struct qla_tgt *tgt;
5138
5139         if (!QLA_TGT_MODE_ENABLED())
5140                 return 0;
5141
5142         if (!IS_TGT_MODE_CAPABLE(ha)) {
5143                 ql_log(ql_log_warn, base_vha, 0xe070,
5144                     "This adapter does not support target mode.\n");
5145                 return 0;
5146         }
5147
5148         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5149             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5150
5151         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5152
5153         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5154         if (!tgt) {
5155                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5156                     "Unable to allocate struct qla_tgt\n");
5157                 return -ENOMEM;
5158         }
5159
5160         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5161                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5162
5163         tgt->ha = ha;
5164         tgt->vha = base_vha;
5165         init_waitqueue_head(&tgt->waitQ);
5166         INIT_LIST_HEAD(&tgt->sess_list);
5167         INIT_LIST_HEAD(&tgt->del_sess_list);
5168         INIT_DELAYED_WORK(&tgt->sess_del_work,
5169                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5170         spin_lock_init(&tgt->sess_work_lock);
5171         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5172         INIT_LIST_HEAD(&tgt->sess_works_list);
5173         spin_lock_init(&tgt->srr_lock);
5174         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5175         INIT_LIST_HEAD(&tgt->srr_imm_list);
5176         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5177         atomic_set(&tgt->tgt_global_resets_count, 0);
5178
5179         base_vha->vha_tgt.qla_tgt = tgt;
5180
5181         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5182                 "qla_target(%d): using 64 Bit PCI addressing",
5183                 base_vha->vp_idx);
5184         tgt->tgt_enable_64bit_addr = 1;
5185         /* 3 is reserved */
5186         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5187         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5188         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5189
5190         if (base_vha->fc_vport)
5191                 return 0;
5192
5193         mutex_lock(&qla_tgt_mutex);
5194         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5195         mutex_unlock(&qla_tgt_mutex);
5196
5197         return 0;
5198 }
5199
5200 /* Must be called under tgt_host_action_mutex */
5201 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5202 {
5203         if (!vha->vha_tgt.qla_tgt)
5204                 return 0;
5205
5206         if (vha->fc_vport) {
5207                 qlt_release(vha->vha_tgt.qla_tgt);
5208                 return 0;
5209         }
5210
5211         /* free left over qfull cmds */
5212         qlt_init_term_exchange(vha);
5213
5214         mutex_lock(&qla_tgt_mutex);
5215         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5216         mutex_unlock(&qla_tgt_mutex);
5217
5218         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5219             vha->host_no, ha);
5220         qlt_release(vha->vha_tgt.qla_tgt);
5221
5222         return 0;
5223 }
5224
5225 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5226         unsigned char *b)
5227 {
5228         int i;
5229
5230         pr_debug("qla2xxx HW vha->node_name: ");
5231         for (i = 0; i < WWN_SIZE; i++)
5232                 pr_debug("%02x ", vha->node_name[i]);
5233         pr_debug("\n");
5234         pr_debug("qla2xxx HW vha->port_name: ");
5235         for (i = 0; i < WWN_SIZE; i++)
5236                 pr_debug("%02x ", vha->port_name[i]);
5237         pr_debug("\n");
5238
5239         pr_debug("qla2xxx passed configfs WWPN: ");
5240         put_unaligned_be64(wwpn, b);
5241         for (i = 0; i < WWN_SIZE; i++)
5242                 pr_debug("%02x ", b[i]);
5243         pr_debug("\n");
5244 }
5245
5246 /**
5247  * qla_tgt_lport_register - register lport with external module
5248  *
5249  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5250  * @wwpn: Passwd FC target WWPN
5251  * @callback:  lport initialization callback for tcm_qla2xxx code
5252  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5253  */
5254 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5255                        u64 npiv_wwpn, u64 npiv_wwnn,
5256                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5257 {
5258         struct qla_tgt *tgt;
5259         struct scsi_qla_host *vha;
5260         struct qla_hw_data *ha;
5261         struct Scsi_Host *host;
5262         unsigned long flags;
5263         int rc;
5264         u8 b[WWN_SIZE];
5265
5266         mutex_lock(&qla_tgt_mutex);
5267         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5268                 vha = tgt->vha;
5269                 ha = vha->hw;
5270
5271                 host = vha->host;
5272                 if (!host)
5273                         continue;
5274
5275                 if (!(host->hostt->supported_mode & MODE_TARGET))
5276                         continue;
5277
5278                 spin_lock_irqsave(&ha->hardware_lock, flags);
5279                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5280                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5281                             host->host_no);
5282                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5283                         continue;
5284                 }
5285                 if (tgt->tgt_stop) {
5286                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5287                                  host->host_no);
5288                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5289                         continue;
5290                 }
5291                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5292
5293                 if (!scsi_host_get(host)) {
5294                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5295                             "Unable to scsi_host_get() for"
5296                             " qla2xxx scsi_host\n");
5297                         continue;
5298                 }
5299                 qlt_lport_dump(vha, phys_wwpn, b);
5300
5301                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5302                         scsi_host_put(host);
5303                         continue;
5304                 }
5305                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5306                 if (rc != 0)
5307                         scsi_host_put(host);
5308
5309                 mutex_unlock(&qla_tgt_mutex);
5310                 return rc;
5311         }
5312         mutex_unlock(&qla_tgt_mutex);
5313
5314         return -ENODEV;
5315 }
5316 EXPORT_SYMBOL(qlt_lport_register);
5317
5318 /**
5319  * qla_tgt_lport_deregister - Degister lport
5320  *
5321  * @vha:  Registered scsi_qla_host pointer
5322  */
5323 void qlt_lport_deregister(struct scsi_qla_host *vha)
5324 {
5325         struct qla_hw_data *ha = vha->hw;
5326         struct Scsi_Host *sh = vha->host;
5327         /*
5328          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5329          */
5330         vha->vha_tgt.target_lport_ptr = NULL;
5331         ha->tgt.tgt_ops = NULL;
5332         /*
5333          * Release the Scsi_Host reference for the underlying qla2xxx host
5334          */
5335         scsi_host_put(sh);
5336 }
5337 EXPORT_SYMBOL(qlt_lport_deregister);
5338
5339 /* Must be called under HW lock */
5340 static void qlt_set_mode(struct scsi_qla_host *vha)
5341 {
5342         struct qla_hw_data *ha = vha->hw;
5343
5344         switch (ql2x_ini_mode) {
5345         case QLA2XXX_INI_MODE_DISABLED:
5346         case QLA2XXX_INI_MODE_EXCLUSIVE:
5347                 vha->host->active_mode = MODE_TARGET;
5348                 break;
5349         case QLA2XXX_INI_MODE_ENABLED:
5350                 vha->host->active_mode |= MODE_TARGET;
5351                 break;
5352         default:
5353                 break;
5354         }
5355
5356         if (ha->tgt.ini_mode_force_reverse)
5357                 qla_reverse_ini_mode(vha);
5358 }
5359
5360 /* Must be called under HW lock */
5361 static void qlt_clear_mode(struct scsi_qla_host *vha)
5362 {
5363         struct qla_hw_data *ha = vha->hw;
5364
5365         switch (ql2x_ini_mode) {
5366         case QLA2XXX_INI_MODE_DISABLED:
5367                 vha->host->active_mode = MODE_UNKNOWN;
5368                 break;
5369         case QLA2XXX_INI_MODE_EXCLUSIVE:
5370                 vha->host->active_mode = MODE_INITIATOR;
5371                 break;
5372         case QLA2XXX_INI_MODE_ENABLED:
5373                 vha->host->active_mode &= ~MODE_TARGET;
5374                 break;
5375         default:
5376                 break;
5377         }
5378
5379         if (ha->tgt.ini_mode_force_reverse)
5380                 qla_reverse_ini_mode(vha);
5381 }
5382
5383 /*
5384  * qla_tgt_enable_vha - NO LOCK HELD
5385  *
5386  * host_reset, bring up w/ Target Mode Enabled
5387  */
5388 void
5389 qlt_enable_vha(struct scsi_qla_host *vha)
5390 {
5391         struct qla_hw_data *ha = vha->hw;
5392         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5393         unsigned long flags;
5394         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5395
5396         if (!tgt) {
5397                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5398                     "Unable to locate qla_tgt pointer from"
5399                     " struct qla_hw_data\n");
5400                 dump_stack();
5401                 return;
5402         }
5403
5404         spin_lock_irqsave(&ha->hardware_lock, flags);
5405         tgt->tgt_stopped = 0;
5406         qlt_set_mode(vha);
5407         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5408
5409         if (vha->vp_idx) {
5410                 qla24xx_disable_vp(vha);
5411                 qla24xx_enable_vp(vha);
5412         } else {
5413                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5414                 qla2xxx_wake_dpc(base_vha);
5415                 qla2x00_wait_for_hba_online(base_vha);
5416         }
5417 }
5418 EXPORT_SYMBOL(qlt_enable_vha);
5419
5420 /*
5421  * qla_tgt_disable_vha - NO LOCK HELD
5422  *
5423  * Disable Target Mode and reset the adapter
5424  */
5425 static void qlt_disable_vha(struct scsi_qla_host *vha)
5426 {
5427         struct qla_hw_data *ha = vha->hw;
5428         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5429         unsigned long flags;
5430
5431         if (!tgt) {
5432                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5433                     "Unable to locate qla_tgt pointer from"
5434                     " struct qla_hw_data\n");
5435                 dump_stack();
5436                 return;
5437         }
5438
5439         spin_lock_irqsave(&ha->hardware_lock, flags);
5440         qlt_clear_mode(vha);
5441         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5442
5443         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5444         qla2xxx_wake_dpc(vha);
5445         qla2x00_wait_for_hba_online(vha);
5446 }
5447
5448 /*
5449  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5450  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5451  * members.
5452  */
5453 void
5454 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5455 {
5456         if (!qla_tgt_mode_enabled(vha))
5457                 return;
5458
5459         vha->vha_tgt.qla_tgt = NULL;
5460
5461         mutex_init(&vha->vha_tgt.tgt_mutex);
5462         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5463
5464         qlt_clear_mode(vha);
5465
5466         /*
5467          * NOTE: Currently the value is kept the same for <24xx and
5468          * >=24xx ISPs. If it is necessary to change it,
5469          * the check should be added for specific ISPs,
5470          * assigning the value appropriately.
5471          */
5472         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5473
5474         qlt_add_target(ha, vha);
5475 }
5476
5477 void
5478 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5479 {
5480         /*
5481          * FC-4 Feature bit 0 indicates target functionality to the name server.
5482          */
5483         if (qla_tgt_mode_enabled(vha)) {
5484                 if (qla_ini_mode_enabled(vha))
5485                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5486                 else
5487                         ct_req->req.rff_id.fc4_feature = BIT_0;
5488         } else if (qla_ini_mode_enabled(vha)) {
5489                 ct_req->req.rff_id.fc4_feature = BIT_1;
5490         }
5491 }
5492
5493 /*
5494  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5495  * @ha: HA context
5496  *
5497  * Beginning of ATIO ring has initialization control block already built
5498  * by nvram config routine.
5499  *
5500  * Returns 0 on success.
5501  */
5502 void
5503 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5504 {
5505         struct qla_hw_data *ha = vha->hw;
5506         uint16_t cnt;
5507         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5508
5509         if (!qla_tgt_mode_enabled(vha))
5510                 return;
5511
5512         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5513                 pkt->u.raw.signature = ATIO_PROCESSED;
5514                 pkt++;
5515         }
5516
5517 }
5518
5519 /*
5520  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5521  * @ha: SCSI driver HA context
5522  */
5523 void
5524 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5525 {
5526         struct qla_hw_data *ha = vha->hw;
5527         struct atio_from_isp *pkt;
5528         int cnt, i;
5529
5530         if (!vha->flags.online)
5531                 return;
5532
5533         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5534                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5535                 cnt = pkt->u.raw.entry_count;
5536
5537                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5538
5539                 for (i = 0; i < cnt; i++) {
5540                         ha->tgt.atio_ring_index++;
5541                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5542                                 ha->tgt.atio_ring_index = 0;
5543                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5544                         } else
5545                                 ha->tgt.atio_ring_ptr++;
5546
5547                         pkt->u.raw.signature = ATIO_PROCESSED;
5548                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5549                 }
5550                 wmb();
5551         }
5552
5553         /* Adjust ring index */
5554         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5555 }
5556
5557 void
5558 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5559 {
5560         struct qla_hw_data *ha = vha->hw;
5561         if (!QLA_TGT_MODE_ENABLED())
5562                 return;
5563
5564         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5565         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5566         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5567
5568         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5569                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5570                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5571
5572                 icb->msix_atio = cpu_to_le16(msix->entry);
5573                 ql_dbg(ql_dbg_init, vha, 0xf072,
5574                     "Registering ICB vector 0x%x for atio que.\n",
5575                     msix->entry);
5576         }
5577 }
5578
5579 void
5580 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5581 {
5582         struct qla_hw_data *ha = vha->hw;
5583
5584         if (qla_tgt_mode_enabled(vha)) {
5585                 if (!ha->tgt.saved_set) {
5586                         /* We save only once */
5587                         ha->tgt.saved_exchange_count = nv->exchange_count;
5588                         ha->tgt.saved_firmware_options_1 =
5589                             nv->firmware_options_1;
5590                         ha->tgt.saved_firmware_options_2 =
5591                             nv->firmware_options_2;
5592                         ha->tgt.saved_firmware_options_3 =
5593                             nv->firmware_options_3;
5594                         ha->tgt.saved_set = 1;
5595                 }
5596
5597                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5598
5599                 /* Enable target mode */
5600                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5601
5602                 /* Disable ini mode, if requested */
5603                 if (!qla_ini_mode_enabled(vha))
5604                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5605
5606                 /* Disable Full Login after LIP */
5607                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5608                 /* Enable initial LIP */
5609                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5610                 if (ql2xtgt_tape_enable)
5611                         /* Enable FC Tape support */
5612                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5613                 else
5614                         /* Disable FC Tape support */
5615                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5616
5617                 /* Disable Full Login after LIP */
5618                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5619                 /* Enable target PRLI control */
5620                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5621         } else {
5622                 if (ha->tgt.saved_set) {
5623                         nv->exchange_count = ha->tgt.saved_exchange_count;
5624                         nv->firmware_options_1 =
5625                             ha->tgt.saved_firmware_options_1;
5626                         nv->firmware_options_2 =
5627                             ha->tgt.saved_firmware_options_2;
5628                         nv->firmware_options_3 =
5629                             ha->tgt.saved_firmware_options_3;
5630                 }
5631                 return;
5632         }
5633
5634         /* out-of-order frames reassembly */
5635         nv->firmware_options_3 |= BIT_6|BIT_9;
5636
5637         if (ha->tgt.enable_class_2) {
5638                 if (vha->flags.init_done)
5639                         fc_host_supported_classes(vha->host) =
5640                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5641
5642                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5643         } else {
5644                 if (vha->flags.init_done)
5645                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5646
5647                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5648         }
5649 }
5650
5651 void
5652 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5653         struct init_cb_24xx *icb)
5654 {
5655         struct qla_hw_data *ha = vha->hw;
5656
5657         if (ha->tgt.node_name_set) {
5658                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5659                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5660         }
5661 }
5662
5663 void
5664 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5665 {
5666         struct qla_hw_data *ha = vha->hw;
5667
5668         if (!QLA_TGT_MODE_ENABLED())
5669                 return;
5670
5671         if (qla_tgt_mode_enabled(vha)) {
5672                 if (!ha->tgt.saved_set) {
5673                         /* We save only once */
5674                         ha->tgt.saved_exchange_count = nv->exchange_count;
5675                         ha->tgt.saved_firmware_options_1 =
5676                             nv->firmware_options_1;
5677                         ha->tgt.saved_firmware_options_2 =
5678                             nv->firmware_options_2;
5679                         ha->tgt.saved_firmware_options_3 =
5680                             nv->firmware_options_3;
5681                         ha->tgt.saved_set = 1;
5682                 }
5683
5684                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5685
5686                 /* Enable target mode */
5687                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5688
5689                 /* Disable ini mode, if requested */
5690                 if (!qla_ini_mode_enabled(vha))
5691                         nv->firmware_options_1 |=
5692                             __constant_cpu_to_le32(BIT_5);
5693
5694                 /* Disable Full Login after LIP */
5695                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5696                 /* Enable initial LIP */
5697                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5698                 if (ql2xtgt_tape_enable)
5699                         /* Enable FC tape support */
5700                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5701                 else
5702                         /* Disable FC tape support */
5703                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5704
5705                 /* Disable Full Login after LIP */
5706                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5707                 /* Enable target PRLI control */
5708                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5709         } else {
5710                 if (ha->tgt.saved_set) {
5711                         nv->exchange_count = ha->tgt.saved_exchange_count;
5712                         nv->firmware_options_1 =
5713                             ha->tgt.saved_firmware_options_1;
5714                         nv->firmware_options_2 =
5715                             ha->tgt.saved_firmware_options_2;
5716                         nv->firmware_options_3 =
5717                             ha->tgt.saved_firmware_options_3;
5718                 }
5719                 return;
5720         }
5721
5722         /* out-of-order frames reassembly */
5723         nv->firmware_options_3 |= BIT_6|BIT_9;
5724
5725         if (ha->tgt.enable_class_2) {
5726                 if (vha->flags.init_done)
5727                         fc_host_supported_classes(vha->host) =
5728                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5729
5730                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5731         } else {
5732                 if (vha->flags.init_done)
5733                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5734
5735                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5736         }
5737 }
5738
5739 void
5740 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5741         struct init_cb_81xx *icb)
5742 {
5743         struct qla_hw_data *ha = vha->hw;
5744
5745         if (!QLA_TGT_MODE_ENABLED())
5746                 return;
5747
5748         if (ha->tgt.node_name_set) {
5749                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5750                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5751         }
5752 }
5753
5754 void
5755 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5756 {
5757         if (!QLA_TGT_MODE_ENABLED())
5758                 return;
5759
5760         ha->msix_count += 1; /* For ATIO Q */
5761 }
5762
5763 int
5764 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5765         struct sts_entry_24xx *pkt)
5766 {
5767         switch (pkt->entry_type) {
5768         case ABTS_RECV_24XX:
5769         case ABTS_RESP_24XX:
5770         case CTIO_TYPE7:
5771         case NOTIFY_ACK_TYPE:
5772         case CTIO_CRC2:
5773                 return 1;
5774         default:
5775                 return 0;
5776         }
5777 }
5778
5779 void
5780 qlt_modify_vp_config(struct scsi_qla_host *vha,
5781         struct vp_config_entry_24xx *vpmod)
5782 {
5783         if (qla_tgt_mode_enabled(vha))
5784                 vpmod->options_idx1 &= ~BIT_5;
5785         /* Disable ini mode, if requested */
5786         if (!qla_ini_mode_enabled(vha))
5787                 vpmod->options_idx1 &= ~BIT_4;
5788 }
5789
5790 void
5791 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5792 {
5793         if (!QLA_TGT_MODE_ENABLED())
5794                 return;
5795
5796         if  (ha->mqenable || IS_QLA83XX(ha)) {
5797                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5798                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5799         } else {
5800                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5801                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5802         }
5803
5804         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5805         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5806         qlt_clear_mode(base_vha);
5807 }
5808
5809 irqreturn_t
5810 qla83xx_msix_atio_q(int irq, void *dev_id)
5811 {
5812         struct rsp_que *rsp;
5813         scsi_qla_host_t *vha;
5814         struct qla_hw_data *ha;
5815         unsigned long flags;
5816
5817         rsp = (struct rsp_que *) dev_id;
5818         ha = rsp->hw;
5819         vha = pci_get_drvdata(ha->pdev);
5820
5821         spin_lock_irqsave(&ha->hardware_lock, flags);
5822
5823         qlt_24xx_process_atio_queue(vha);
5824         qla24xx_process_response_queue(vha, rsp);
5825
5826         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5827
5828         return IRQ_HANDLED;
5829 }
5830
5831 int
5832 qlt_mem_alloc(struct qla_hw_data *ha)
5833 {
5834         if (!QLA_TGT_MODE_ENABLED())
5835                 return 0;
5836
5837         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5838             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5839         if (!ha->tgt.tgt_vp_map)
5840                 return -ENOMEM;
5841
5842         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5843             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5844             &ha->tgt.atio_dma, GFP_KERNEL);
5845         if (!ha->tgt.atio_ring) {
5846                 kfree(ha->tgt.tgt_vp_map);
5847                 return -ENOMEM;
5848         }
5849         return 0;
5850 }
5851
5852 void
5853 qlt_mem_free(struct qla_hw_data *ha)
5854 {
5855         if (!QLA_TGT_MODE_ENABLED())
5856                 return;
5857
5858         if (ha->tgt.atio_ring) {
5859                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5860                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5861                     ha->tgt.atio_dma);
5862         }
5863         kfree(ha->tgt.tgt_vp_map);
5864 }
5865
5866 /* vport_slock to be held by the caller */
5867 void
5868 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5869 {
5870         if (!QLA_TGT_MODE_ENABLED())
5871                 return;
5872
5873         switch (cmd) {
5874         case SET_VP_IDX:
5875                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5876                 break;
5877         case SET_AL_PA:
5878                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5879                 break;
5880         case RESET_VP_IDX:
5881                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5882                 break;
5883         case RESET_AL_PA:
5884                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5885                 break;
5886         }
5887 }
5888
5889 static int __init qlt_parse_ini_mode(void)
5890 {
5891         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5892                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5893         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5894                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5895         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5896                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5897         else
5898                 return false;
5899
5900         return true;
5901 }
5902
5903 int __init qlt_init(void)
5904 {
5905         int ret;
5906
5907         if (!qlt_parse_ini_mode()) {
5908                 ql_log(ql_log_fatal, NULL, 0xe06b,
5909                     "qlt_parse_ini_mode() failed\n");
5910                 return -EINVAL;
5911         }
5912
5913         if (!QLA_TGT_MODE_ENABLED())
5914                 return 0;
5915
5916         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5917             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5918             qla_tgt_mgmt_cmd), 0, NULL);
5919         if (!qla_tgt_mgmt_cmd_cachep) {
5920                 ql_log(ql_log_fatal, NULL, 0xe06d,
5921                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5922                 return -ENOMEM;
5923         }
5924
5925         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5926             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5927         if (!qla_tgt_mgmt_cmd_mempool) {
5928                 ql_log(ql_log_fatal, NULL, 0xe06e,
5929                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5930                 ret = -ENOMEM;
5931                 goto out_mgmt_cmd_cachep;
5932         }
5933
5934         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5935         if (!qla_tgt_wq) {
5936                 ql_log(ql_log_fatal, NULL, 0xe06f,
5937                     "alloc_workqueue for qla_tgt_wq failed\n");
5938                 ret = -ENOMEM;
5939                 goto out_cmd_mempool;
5940         }
5941         /*
5942          * Return 1 to signal that initiator-mode is being disabled
5943          */
5944         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5945
5946 out_cmd_mempool:
5947         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5948 out_mgmt_cmd_cachep:
5949         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5950         return ret;
5951 }
5952
5953 void qlt_exit(void)
5954 {
5955         if (!QLA_TGT_MODE_ENABLED())
5956                 return;
5957
5958         destroy_workqueue(qla_tgt_wq);
5959         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5960         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5961 }