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         uint32_t                transfer_length = 0;
2081         uint32_t                data_bytes;
2082         uint32_t                dif_bytes;
2083         uint8_t                 bundling = 1;
2084         uint8_t                 *clr_ptr;
2085         struct crc_context      *crc_ctx_pkt = NULL;
2086         struct qla_hw_data      *ha;
2087         struct ctio_crc2_to_fw  *pkt;
2088         dma_addr_t              crc_ctx_dma;
2089         uint16_t                fw_prot_opts = 0;
2090         struct qla_tgt_cmd      *cmd = prm->cmd;
2091         struct se_cmd           *se_cmd = &cmd->se_cmd;
2092         uint32_t h;
2093         struct atio_from_isp *atio = &prm->cmd->atio;
2094         uint16_t t16;
2095
2096         ha = vha->hw;
2097
2098         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2099         prm->pkt = pkt;
2100         memset(pkt, 0, sizeof(*pkt));
2101
2102         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2103                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2104                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2105                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2106
2107         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2108             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2109                 bundling = 0;
2110
2111         /* Compute dif len and adjust data len to incude protection */
2112         data_bytes = cmd->bufflen;
2113         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2114
2115         switch (se_cmd->prot_op) {
2116         case TARGET_PROT_DIN_INSERT:
2117         case TARGET_PROT_DOUT_STRIP:
2118                 transfer_length = data_bytes;
2119                 data_bytes += dif_bytes;
2120                 break;
2121
2122         case TARGET_PROT_DIN_STRIP:
2123         case TARGET_PROT_DOUT_INSERT:
2124         case TARGET_PROT_DIN_PASS:
2125         case TARGET_PROT_DOUT_PASS:
2126                 transfer_length = data_bytes + dif_bytes;
2127                 break;
2128
2129         default:
2130                 BUG();
2131                 break;
2132         }
2133
2134         if (!qlt_hba_err_chk_enabled(se_cmd))
2135                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2136         /* HBA error checking enabled */
2137         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2138                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2139                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2140                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2141                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2142                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2143         }
2144
2145         switch (se_cmd->prot_op) {
2146         case TARGET_PROT_DIN_INSERT:
2147         case TARGET_PROT_DOUT_INSERT:
2148                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2149                 break;
2150         case TARGET_PROT_DIN_STRIP:
2151         case TARGET_PROT_DOUT_STRIP:
2152                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2153                 break;
2154         case TARGET_PROT_DIN_PASS:
2155         case TARGET_PROT_DOUT_PASS:
2156                 fw_prot_opts |= PO_MODE_DIF_PASS;
2157                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2158                 break;
2159         default:/* Normal Request */
2160                 fw_prot_opts |= PO_MODE_DIF_PASS;
2161                 break;
2162         }
2163
2164
2165         /* ---- PKT ---- */
2166         /* Update entry type to indicate Command Type CRC_2 IOCB */
2167         pkt->entry_type  = CTIO_CRC2;
2168         pkt->entry_count = 1;
2169         pkt->vp_index = vha->vp_idx;
2170
2171         h = qlt_make_handle(vha);
2172         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2173                 /*
2174                  * CTIO type 7 from the firmware doesn't provide a way to
2175                  * know the initiator's LOOP ID, hence we can't find
2176                  * the session and, so, the command.
2177                  */
2178                 return -EAGAIN;
2179         } else
2180                 ha->tgt.cmds[h-1] = prm->cmd;
2181
2182
2183         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2184         pkt->nport_handle = prm->cmd->loop_id;
2185         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2186         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2187         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2188         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2189         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2190
2191         /* silence compile warning */
2192         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2193         pkt->ox_id  = cpu_to_le16(t16);
2194
2195         t16 = (atio->u.isp24.attr << 9);
2196         pkt->flags |= cpu_to_le16(t16);
2197         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2198
2199         /* Set transfer direction */
2200         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2201                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2202         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2203                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2204
2205
2206         pkt->dseg_count = prm->tot_dsds;
2207         /* Fibre channel byte count */
2208         pkt->transfer_length = cpu_to_le32(transfer_length);
2209
2210
2211         /* ----- CRC context -------- */
2212
2213         /* Allocate CRC context from global pool */
2214         crc_ctx_pkt = cmd->ctx =
2215             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2216
2217         if (!crc_ctx_pkt)
2218                 goto crc_queuing_error;
2219
2220         /* Zero out CTX area. */
2221         clr_ptr = (uint8_t *)crc_ctx_pkt;
2222         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2223
2224         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2225         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2226
2227         /* Set handle */
2228         crc_ctx_pkt->handle = pkt->handle;
2229
2230         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2231
2232         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2233         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2234         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2235
2236
2237         if (!bundling) {
2238                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2239         } else {
2240                 /*
2241                  * Configure Bundling if we need to fetch interlaving
2242                  * protection PCI accesses
2243                  */
2244                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2245                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2246                 crc_ctx_pkt->u.bundling.dseg_count =
2247                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2248                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2249         }
2250
2251         /* Finish the common fields of CRC pkt */
2252         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2253         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2254         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2255         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2256
2257
2258         /* Walks data segments */
2259         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2260
2261         if (!bundling && prm->prot_seg_cnt) {
2262                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2263                         prm->tot_dsds, cmd))
2264                         goto crc_queuing_error;
2265         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2266                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2267                 goto crc_queuing_error;
2268
2269         if (bundling && prm->prot_seg_cnt) {
2270                 /* Walks dif segments */
2271                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2272
2273                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2274                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2275                         prm->prot_seg_cnt, cmd))
2276                         goto crc_queuing_error;
2277         }
2278         return QLA_SUCCESS;
2279
2280 crc_queuing_error:
2281         /* Cleanup will be performed by the caller */
2282
2283         return QLA_FUNCTION_FAILED;
2284 }
2285
2286
2287 /*
2288  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2289  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2290  */
2291 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2292         uint8_t scsi_status)
2293 {
2294         struct scsi_qla_host *vha = cmd->vha;
2295         struct qla_hw_data *ha = vha->hw;
2296         struct ctio7_to_24xx *pkt;
2297         struct qla_tgt_prm prm;
2298         uint32_t full_req_cnt = 0;
2299         unsigned long flags = 0;
2300         int res;
2301
2302         memset(&prm, 0, sizeof(prm));
2303         qlt_check_srr_debug(cmd, &xmit_type);
2304
2305         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2306             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2307             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2308             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2309             &cmd->se_cmd);
2310
2311         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2312             &full_req_cnt);
2313         if (unlikely(res != 0)) {
2314                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2315                         return 0;
2316
2317                 return res;
2318         }
2319
2320         spin_lock_irqsave(&ha->hardware_lock, flags);
2321
2322         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2323                 /*
2324                  * Either a chip reset is active or this request was from
2325                  * previous life, just abort the processing.
2326                  */
2327                 cmd->state = QLA_TGT_STATE_PROCESSED;
2328                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2329                 ql_dbg(ql_dbg_async, vha, 0xe101,
2330                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2331                         qla2x00_reset_active(vha), cmd->reset_count,
2332                         ha->chip_reset);
2333                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2334                 return 0;
2335         }
2336
2337         /* Does F/W have an IOCBs for this request */
2338         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2339         if (unlikely(res))
2340                 goto out_unmap_unlock;
2341
2342         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2343                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2344         else
2345                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2346         if (unlikely(res != 0))
2347                 goto out_unmap_unlock;
2348
2349
2350         pkt = (struct ctio7_to_24xx *)prm.pkt;
2351
2352         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2353                 pkt->u.status0.flags |=
2354                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2355                         CTIO7_FLAGS_STATUS_MODE_0);
2356
2357                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2358                         qlt_load_data_segments(&prm, vha);
2359
2360                 if (prm.add_status_pkt == 0) {
2361                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2362                                 pkt->u.status0.scsi_status =
2363                                     cpu_to_le16(prm.rq_result);
2364                                 pkt->u.status0.residual =
2365                                     cpu_to_le32(prm.residual);
2366                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2367                                     CTIO7_FLAGS_SEND_STATUS);
2368                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2369                                         pkt->u.status0.flags |=
2370                                             __constant_cpu_to_le16(
2371                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2372                                                 CTIO7_FLAGS_CONFORM_REQ);
2373                                 }
2374                         }
2375
2376                 } else {
2377                         /*
2378                          * We have already made sure that there is sufficient
2379                          * amount of request entries to not drop HW lock in
2380                          * req_pkt().
2381                          */
2382                         struct ctio7_to_24xx *ctio =
2383                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2384
2385                         ql_dbg(ql_dbg_io, vha, 0x305e,
2386                             "Building additional status packet 0x%p.\n",
2387                             ctio);
2388
2389                         /*
2390                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2391                          * ctio7_to_24xx
2392                          */
2393                         memcpy(ctio, pkt, sizeof(*ctio));
2394                         /* reset back to CTIO7 */
2395                         ctio->entry_count = 1;
2396                         ctio->entry_type = CTIO_TYPE7;
2397                         ctio->dseg_count = 0;
2398                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2399                             CTIO7_FLAGS_DATA_IN);
2400
2401                         /* Real finish is ctio_m1's finish */
2402                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2403                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2404                             CTIO7_FLAGS_DONT_RET_CTIO);
2405
2406                         /* qlt_24xx_init_ctio_to_isp will correct
2407                          * all neccessary fields that's part of CTIO7.
2408                          * There should be no residual of CTIO-CRC2 data.
2409                          */
2410                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2411                             &prm);
2412                         pr_debug("Status CTIO7: %p\n", ctio);
2413                 }
2414         } else
2415                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2416
2417
2418         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2419         cmd->cmd_sent_to_fw = 1;
2420
2421         /* Memory Barrier */
2422         wmb();
2423         qla2x00_start_iocbs(vha, vha->req);
2424         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2425
2426         return 0;
2427
2428 out_unmap_unlock:
2429         qlt_unmap_sg(vha, cmd);
2430         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2431
2432         return res;
2433 }
2434 EXPORT_SYMBOL(qlt_xmit_response);
2435
2436 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2437 {
2438         struct ctio7_to_24xx *pkt;
2439         struct scsi_qla_host *vha = cmd->vha;
2440         struct qla_hw_data *ha = vha->hw;
2441         struct qla_tgt *tgt = cmd->tgt;
2442         struct qla_tgt_prm prm;
2443         unsigned long flags;
2444         int res = 0;
2445
2446         memset(&prm, 0, sizeof(prm));
2447         prm.cmd = cmd;
2448         prm.tgt = tgt;
2449         prm.sg = NULL;
2450         prm.req_cnt = 1;
2451
2452         /* Send marker if required */
2453         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2454                 return -EIO;
2455
2456         /* Calculate number of entries and segments required */
2457         if (qlt_pci_map_calc_cnt(&prm) != 0)
2458                 return -EAGAIN;
2459
2460         spin_lock_irqsave(&ha->hardware_lock, flags);
2461
2462         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2463                 /*
2464                  * Either a chip reset is active or this request was from
2465                  * previous life, just abort the processing.
2466                  */
2467                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2468                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2469                 ql_dbg(ql_dbg_async, vha, 0xe102,
2470                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2471                         qla2x00_reset_active(vha), cmd->reset_count,
2472                         ha->chip_reset);
2473                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2474                 return 0;
2475         }
2476
2477         /* Does F/W have an IOCBs for this request */
2478         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2479         if (res != 0)
2480                 goto out_unlock_free_unmap;
2481         if (cmd->se_cmd.prot_op)
2482                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2483         else
2484                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2485
2486         if (unlikely(res != 0))
2487                 goto out_unlock_free_unmap;
2488         pkt = (struct ctio7_to_24xx *)prm.pkt;
2489         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2490             CTIO7_FLAGS_STATUS_MODE_0);
2491
2492         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2493                 qlt_load_data_segments(&prm, vha);
2494
2495         cmd->state = QLA_TGT_STATE_NEED_DATA;
2496         cmd->cmd_sent_to_fw = 1;
2497
2498         /* Memory Barrier */
2499         wmb();
2500         qla2x00_start_iocbs(vha, vha->req);
2501         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2502
2503         return res;
2504
2505 out_unlock_free_unmap:
2506         qlt_unmap_sg(vha, cmd);
2507         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2508
2509         return res;
2510 }
2511 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2512
2513
2514 /*
2515  * Checks the guard or meta-data for the type of error
2516  * detected by the HBA.
2517  */
2518 static inline int
2519 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2520                 struct ctio_crc_from_fw *sts)
2521 {
2522         uint8_t         *ap = &sts->actual_dif[0];
2523         uint8_t         *ep = &sts->expected_dif[0];
2524         uint32_t        e_ref_tag, a_ref_tag;
2525         uint16_t        e_app_tag, a_app_tag;
2526         uint16_t        e_guard, a_guard;
2527         uint64_t        lba = cmd->se_cmd.t_task_lba;
2528
2529         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2530         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2531         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2532
2533         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2534         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2535         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2536
2537         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2538             "iocb(s) %p Returned STATUS.\n", sts);
2539
2540         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2541             "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",
2542             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2543             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2544
2545         /*
2546          * Ignore sector if:
2547          * For type     3: ref & app tag is all 'f's
2548          * For type 0,1,2: app tag is all 'f's
2549          */
2550         if ((a_app_tag == 0xffff) &&
2551             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2552              (a_ref_tag == 0xffffffff))) {
2553                 uint32_t blocks_done;
2554
2555                 /* 2TB boundary case covered automatically with this */
2556                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2557                 cmd->se_cmd.bad_sector = e_ref_tag;
2558                 cmd->se_cmd.pi_err = 0;
2559                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2560                         "need to return scsi good\n");
2561
2562                 /* Update protection tag */
2563                 if (cmd->prot_sg_cnt) {
2564                         uint32_t i, k = 0, num_ent;
2565                         struct scatterlist *sg, *sgl;
2566
2567
2568                         sgl = cmd->prot_sg;
2569
2570                         /* Patch the corresponding protection tags */
2571                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2572                                 num_ent = sg_dma_len(sg) / 8;
2573                                 if (k + num_ent < blocks_done) {
2574                                         k += num_ent;
2575                                         continue;
2576                                 }
2577                                 k = blocks_done;
2578                                 break;
2579                         }
2580
2581                         if (k != blocks_done) {
2582                                 ql_log(ql_log_warn, vha, 0xf076,
2583                                     "unexpected tag values tag:lba=%u:%llu)\n",
2584                                     e_ref_tag, (unsigned long long)lba);
2585                                 goto out;
2586                         }
2587
2588 #if 0
2589                         struct sd_dif_tuple *spt;
2590                         /* TODO:
2591                          * This section came from initiator. Is it valid here?
2592                          * should ulp be override with actual val???
2593                          */
2594                         spt = page_address(sg_page(sg)) + sg->offset;
2595                         spt += j;
2596
2597                         spt->app_tag = 0xffff;
2598                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2599                                 spt->ref_tag = 0xffffffff;
2600 #endif
2601                 }
2602
2603                 return 0;
2604         }
2605
2606         /* check guard */
2607         if (e_guard != a_guard) {
2608                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2609                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2610
2611                 ql_log(ql_log_warn, vha, 0xe076,
2612                     "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",
2613                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2614                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2615                     a_guard, e_guard, cmd);
2616                 goto out;
2617         }
2618
2619         /* check ref tag */
2620         if (e_ref_tag != a_ref_tag) {
2621                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2622                 cmd->se_cmd.bad_sector = e_ref_tag;
2623
2624                 ql_log(ql_log_warn, vha, 0xe077,
2625                         "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",
2626                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2627                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2628                         a_guard, e_guard, cmd);
2629                 goto out;
2630         }
2631
2632         /* check appl tag */
2633         if (e_app_tag != a_app_tag) {
2634                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2635                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2636
2637                 ql_log(ql_log_warn, vha, 0xe078,
2638                         "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",
2639                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2640                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2641                         a_guard, e_guard, cmd);
2642                 goto out;
2643         }
2644 out:
2645         return 1;
2646 }
2647
2648
2649 /* If hardware_lock held on entry, might drop it, then reaquire */
2650 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2651 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2652         struct qla_tgt_cmd *cmd,
2653         struct atio_from_isp *atio)
2654 {
2655         struct ctio7_to_24xx *ctio24;
2656         struct qla_hw_data *ha = vha->hw;
2657         request_t *pkt;
2658         int ret = 0;
2659         uint16_t temp;
2660
2661         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2662
2663         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2664         if (pkt == NULL) {
2665                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2666                     "qla_target(%d): %s failed: unable to allocate "
2667                     "request packet\n", vha->vp_idx, __func__);
2668                 return -ENOMEM;
2669         }
2670
2671         if (cmd != NULL) {
2672                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2673                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2674                             "qla_target(%d): Terminating cmd %p with "
2675                             "incorrect state %d\n", vha->vp_idx, cmd,
2676                             cmd->state);
2677                 } else
2678                         ret = 1;
2679         }
2680
2681         pkt->entry_count = 1;
2682         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2683
2684         ctio24 = (struct ctio7_to_24xx *)pkt;
2685         ctio24->entry_type = CTIO_TYPE7;
2686         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2687         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2688         ctio24->vp_index = vha->vp_idx;
2689         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2690         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2691         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2692         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2693         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2694             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2695                 CTIO7_FLAGS_TERMINATE);
2696         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2697         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2698
2699         /* Most likely, it isn't needed */
2700         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2701             &atio->u.isp24.fcp_cmnd.add_cdb[
2702             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2703         if (ctio24->u.status1.residual != 0)
2704                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2705
2706         /* Memory Barrier */
2707         wmb();
2708         qla2x00_start_iocbs(vha, vha->req);
2709         return ret;
2710 }
2711
2712 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2713         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2714 {
2715         unsigned long flags;
2716         int rc;
2717
2718         if (qlt_issue_marker(vha, ha_locked) < 0)
2719                 return;
2720
2721         if (ha_locked) {
2722                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2723                 if (rc == -ENOMEM)
2724                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2725                 goto done;
2726         }
2727         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2728         rc = __qlt_send_term_exchange(vha, cmd, atio);
2729         if (rc == -ENOMEM)
2730                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2731         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2732
2733 done:
2734         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2735             !cmd->cmd_sent_to_fw)) {
2736                 if (!ha_locked && !in_interrupt())
2737                         msleep(250); /* just in case */
2738
2739                 qlt_unmap_sg(vha, cmd);
2740                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2741         }
2742         return;
2743 }
2744
2745 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2746 {
2747         struct list_head free_list;
2748         struct qla_tgt_cmd *cmd, *tcmd;
2749
2750         vha->hw->tgt.leak_exchg_thresh_hold =
2751             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2752
2753         cmd = tcmd = NULL;
2754         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2755                 INIT_LIST_HEAD(&free_list);
2756                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2757
2758                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2759                         list_del(&cmd->cmd_list);
2760                         /* This cmd was never sent to TCM.  There is no need
2761                          * to schedule free or call free_cmd
2762                          */
2763                         qlt_free_cmd(cmd);
2764                         vha->hw->tgt.num_qfull_cmds_alloc--;
2765                 }
2766         }
2767         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2768 }
2769
2770 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2771 {
2772         uint32_t total_leaked;
2773
2774         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2775
2776         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2777             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2778
2779                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2780                     "Chip reset due to exchange starvation: %d/%d.\n",
2781                     total_leaked, vha->hw->fw_xcb_count);
2782
2783                 if (IS_P3P_TYPE(vha->hw))
2784                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2785                 else
2786                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2787                 qla2xxx_wake_dpc(vha);
2788         }
2789
2790 }
2791
2792 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2793 {
2794         struct qla_tgt_sess *sess = cmd->sess;
2795
2796         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2797             "%s: se_cmd[%p] ox_id %04x\n",
2798             __func__, &cmd->se_cmd,
2799             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2800
2801         BUG_ON(cmd->cmd_in_wq);
2802
2803         if (!cmd->q_full)
2804                 qlt_decr_num_pend_cmds(cmd->vha);
2805
2806         BUG_ON(cmd->sg_mapped);
2807         cmd->jiffies_at_free = get_jiffies_64();
2808         if (unlikely(cmd->free_sg))
2809                 kfree(cmd->sg);
2810
2811         if (!sess || !sess->se_sess) {
2812                 WARN_ON(1);
2813                 return;
2814         }
2815         cmd->jiffies_at_free = get_jiffies_64();
2816         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2817 }
2818 EXPORT_SYMBOL(qlt_free_cmd);
2819
2820 /* ha->hardware_lock supposed to be held on entry */
2821 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2822         struct qla_tgt_cmd *cmd, void *ctio)
2823 {
2824         struct qla_tgt_srr_ctio *sc;
2825         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2826         struct qla_tgt_srr_imm *imm;
2827
2828         tgt->ctio_srr_id++;
2829         cmd->cmd_flags |= BIT_15;
2830
2831         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2832             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2833
2834         if (!ctio) {
2835                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2836                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2837                     vha->vp_idx);
2838                 return -EINVAL;
2839         }
2840
2841         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2842         if (sc != NULL) {
2843                 sc->cmd = cmd;
2844                 /* IRQ is already OFF */
2845                 spin_lock(&tgt->srr_lock);
2846                 sc->srr_id = tgt->ctio_srr_id;
2847                 list_add_tail(&sc->srr_list_entry,
2848                     &tgt->srr_ctio_list);
2849                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2850                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2851                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2852                         int found = 0;
2853                         list_for_each_entry(imm, &tgt->srr_imm_list,
2854                             srr_list_entry) {
2855                                 if (imm->srr_id == sc->srr_id) {
2856                                         found = 1;
2857                                         break;
2858                                 }
2859                         }
2860                         if (found) {
2861                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2862                                     "Scheduling srr work\n");
2863                                 schedule_work(&tgt->srr_work);
2864                         } else {
2865                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2866                                     "qla_target(%d): imm_srr_id "
2867                                     "== ctio_srr_id (%d), but there is no "
2868                                     "corresponding SRR IMM, deleting CTIO "
2869                                     "SRR %p\n", vha->vp_idx,
2870                                     tgt->ctio_srr_id, sc);
2871                                 list_del(&sc->srr_list_entry);
2872                                 spin_unlock(&tgt->srr_lock);
2873
2874                                 kfree(sc);
2875                                 return -EINVAL;
2876                         }
2877                 }
2878                 spin_unlock(&tgt->srr_lock);
2879         } else {
2880                 struct qla_tgt_srr_imm *ti;
2881
2882                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2883                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2884                     vha->vp_idx);
2885                 spin_lock(&tgt->srr_lock);
2886                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2887                     srr_list_entry) {
2888                         if (imm->srr_id == tgt->ctio_srr_id) {
2889                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2890                                     "IMM SRR %p deleted (id %d)\n",
2891                                     imm, imm->srr_id);
2892                                 list_del(&imm->srr_list_entry);
2893                                 qlt_reject_free_srr_imm(vha, imm, 1);
2894                         }
2895                 }
2896                 spin_unlock(&tgt->srr_lock);
2897
2898                 return -ENOMEM;
2899         }
2900
2901         return 0;
2902 }
2903
2904 /*
2905  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2906  */
2907 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2908         struct qla_tgt_cmd *cmd, uint32_t status)
2909 {
2910         int term = 0;
2911
2912         if (ctio != NULL) {
2913                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2914                 term = !(c->flags &
2915                     __constant_cpu_to_le16(OF_TERM_EXCH));
2916         } else
2917                 term = 1;
2918
2919         if (term)
2920                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2921
2922         return term;
2923 }
2924
2925 /* ha->hardware_lock supposed to be held on entry */
2926 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2927         uint32_t handle)
2928 {
2929         struct qla_hw_data *ha = vha->hw;
2930
2931         handle--;
2932         if (ha->tgt.cmds[handle] != NULL) {
2933                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2934                 ha->tgt.cmds[handle] = NULL;
2935                 return cmd;
2936         } else
2937                 return NULL;
2938 }
2939
2940 /* ha->hardware_lock supposed to be held on entry */
2941 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2942         uint32_t handle, void *ctio)
2943 {
2944         struct qla_tgt_cmd *cmd = NULL;
2945
2946         /* Clear out internal marks */
2947         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2948             CTIO_INTERMEDIATE_HANDLE_MARK);
2949
2950         if (handle != QLA_TGT_NULL_HANDLE) {
2951                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2952                         return NULL;
2953
2954                 /* handle-1 is actually used */
2955                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2956                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2957                             "qla_target(%d): Wrong handle %x received\n",
2958                             vha->vp_idx, handle);
2959                         return NULL;
2960                 }
2961                 cmd = qlt_get_cmd(vha, handle);
2962                 if (unlikely(cmd == NULL)) {
2963                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2964                             "qla_target(%d): Suspicious: unable to "
2965                             "find the command with handle %x\n", vha->vp_idx,
2966                             handle);
2967                         return NULL;
2968                 }
2969         } else if (ctio != NULL) {
2970                 /* We can't get loop ID from CTIO7 */
2971                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2972                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2973                     "support NULL handles\n", vha->vp_idx);
2974                 return NULL;
2975         }
2976
2977         return cmd;
2978 }
2979
2980 /* hardware_lock should be held by caller. */
2981 static void
2982 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2983 {
2984         struct qla_hw_data *ha = vha->hw;
2985         uint32_t handle;
2986
2987         if (cmd->sg_mapped)
2988                 qlt_unmap_sg(vha, cmd);
2989
2990         handle = qlt_make_handle(vha);
2991
2992         /* TODO: fix debug message type and ids. */
2993         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2994                 ql_dbg(ql_dbg_io, vha, 0xff00,
2995                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
2996         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2997                 cmd->write_data_transferred = 0;
2998                 cmd->state = QLA_TGT_STATE_DATA_IN;
2999
3000                 ql_dbg(ql_dbg_io, vha, 0xff01,
3001                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3002
3003                 ha->tgt.tgt_ops->handle_data(cmd);
3004                 return;
3005         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3006                 ql_dbg(ql_dbg_io, vha, 0xff02,
3007                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3008         } else {
3009                 ql_dbg(ql_dbg_io, vha, 0xff03,
3010                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3011                     cmd->state);
3012                 dump_stack();
3013         }
3014
3015         cmd->cmd_flags |= BIT_12;
3016         ha->tgt.tgt_ops->free_cmd(cmd);
3017 }
3018
3019 void
3020 qlt_host_reset_handler(struct qla_hw_data *ha)
3021 {
3022         struct qla_tgt_cmd *cmd;
3023         unsigned long flags;
3024         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3025         scsi_qla_host_t *vha = NULL;
3026         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3027         uint32_t i;
3028
3029         if (!base_vha->hw->tgt.tgt_ops)
3030                 return;
3031
3032         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3033                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3034                         "Target mode disabled\n");
3035                 return;
3036         }
3037
3038         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3039             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3040             base_vha->dpc_flags);
3041
3042         spin_lock_irqsave(&ha->hardware_lock, flags);
3043         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3044                 cmd = qlt_get_cmd(base_vha, i);
3045                 if (!cmd)
3046                         continue;
3047                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3048                 vha = cmd->vha;
3049                 qlt_abort_cmd_on_host_reset(vha, cmd);
3050         }
3051         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3052 }
3053
3054
3055 /*
3056  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3057  */
3058 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3059         uint32_t status, void *ctio)
3060 {
3061         struct qla_hw_data *ha = vha->hw;
3062         struct se_cmd *se_cmd;
3063         struct qla_tgt_cmd *cmd;
3064
3065         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3066                 /* That could happen only in case of an error/reset/abort */
3067                 if (status != CTIO_SUCCESS) {
3068                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3069                             "Intermediate CTIO received"
3070                             " (status %x)\n", status);
3071                 }
3072                 return;
3073         }
3074
3075         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3076         if (cmd == NULL)
3077                 return;
3078
3079         se_cmd = &cmd->se_cmd;
3080         cmd->cmd_sent_to_fw = 0;
3081
3082         qlt_unmap_sg(vha, cmd);
3083
3084         if (unlikely(status != CTIO_SUCCESS)) {
3085                 switch (status & 0xFFFF) {
3086                 case CTIO_LIP_RESET:
3087                 case CTIO_TARGET_RESET:
3088                 case CTIO_ABORTED:
3089                         /* driver request abort via Terminate exchange */
3090                 case CTIO_TIMEOUT:
3091                 case CTIO_INVALID_RX_ID:
3092                         /* They are OK */
3093                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3094                             "qla_target(%d): CTIO with "
3095                             "status %#x received, state %x, se_cmd %p, "
3096                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3097                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3098                             status, cmd->state, se_cmd);
3099                         break;
3100
3101                 case CTIO_PORT_LOGGED_OUT:
3102                 case CTIO_PORT_UNAVAILABLE:
3103                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3104                             "qla_target(%d): CTIO with PORT LOGGED "
3105                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3106                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3107                             status, cmd->state, se_cmd);
3108                         break;
3109
3110                 case CTIO_SRR_RECEIVED:
3111                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3112                             "qla_target(%d): CTIO with SRR_RECEIVED"
3113                             " status %x received (state %x, se_cmd %p)\n",
3114                             vha->vp_idx, status, cmd->state, se_cmd);
3115                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3116                                 break;
3117                         else
3118                                 return;
3119
3120                 case CTIO_DIF_ERROR: {
3121                         struct ctio_crc_from_fw *crc =
3122                                 (struct ctio_crc_from_fw *)ctio;
3123                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3124                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3125                             vha->vp_idx, status, cmd->state, se_cmd,
3126                             *((u64 *)&crc->actual_dif[0]),
3127                             *((u64 *)&crc->expected_dif[0]));
3128
3129                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3130                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3131                                         /* scsi Write/xfer rdy complete */
3132                                         goto skip_term;
3133                                 } else {
3134                                         /* scsi read/xmit respond complete
3135                                          * call handle dif to send scsi status
3136                                          * rather than terminate exchange.
3137                                          */
3138                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3139                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3140                                         return;
3141                                 }
3142                         } else {
3143                                 /* Need to generate a SCSI good completion.
3144                                  * because FW did not send scsi status.
3145                                  */
3146                                 status = 0;
3147                                 goto skip_term;
3148                         }
3149                         break;
3150                 }
3151                 default:
3152                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3153                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3154                             vha->vp_idx, status, cmd->state, se_cmd);
3155                         break;
3156                 }
3157
3158
3159                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3160                  * cmd is already aborted/terminated, we don't
3161                  * need to terminate again.  The exchange is already
3162                  * cleaned up/freed at FW level.  Just cleanup at driver
3163                  * level.
3164                  */
3165                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3166                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3167                         cmd->cmd_flags |= BIT_13;
3168                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3169                                 return;
3170                 }
3171         }
3172 skip_term:
3173
3174         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3175                 ;
3176         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3177                 cmd->state = QLA_TGT_STATE_DATA_IN;
3178
3179                 if (status == CTIO_SUCCESS)
3180                         cmd->write_data_transferred = 1;
3181
3182                 ha->tgt.tgt_ops->handle_data(cmd);
3183                 return;
3184         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3186                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3187         } else {
3188                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3189                     "qla_target(%d): A command in state (%d) should "
3190                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3191         }
3192
3193         if (unlikely(status != CTIO_SUCCESS) &&
3194                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3195                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3196                 dump_stack();
3197         }
3198
3199
3200         ha->tgt.tgt_ops->free_cmd(cmd);
3201 }
3202
3203 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3204         uint8_t task_codes)
3205 {
3206         int fcp_task_attr;
3207
3208         switch (task_codes) {
3209         case ATIO_SIMPLE_QUEUE:
3210                 fcp_task_attr = TCM_SIMPLE_TAG;
3211                 break;
3212         case ATIO_HEAD_OF_QUEUE:
3213                 fcp_task_attr = TCM_HEAD_TAG;
3214                 break;
3215         case ATIO_ORDERED_QUEUE:
3216                 fcp_task_attr = TCM_ORDERED_TAG;
3217                 break;
3218         case ATIO_ACA_QUEUE:
3219                 fcp_task_attr = TCM_ACA_TAG;
3220                 break;
3221         case ATIO_UNTAGGED:
3222                 fcp_task_attr = TCM_SIMPLE_TAG;
3223                 break;
3224         default:
3225                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3226                     "qla_target: unknown task code %x, use ORDERED instead\n",
3227                     task_codes);
3228                 fcp_task_attr = TCM_ORDERED_TAG;
3229                 break;
3230         }
3231
3232         return fcp_task_attr;
3233 }
3234
3235 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3236                                         uint8_t *);
3237 /*
3238  * Process context for I/O path into tcm_qla2xxx code
3239  */
3240 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3241 {
3242         scsi_qla_host_t *vha = cmd->vha;
3243         struct qla_hw_data *ha = vha->hw;
3244         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3245         struct qla_tgt_sess *sess = cmd->sess;
3246         struct atio_from_isp *atio = &cmd->atio;
3247         unsigned char *cdb;
3248         unsigned long flags;
3249         uint32_t data_length;
3250         int ret, fcp_task_attr, data_dir, bidi = 0;
3251
3252         cmd->cmd_in_wq = 0;
3253         cmd->cmd_flags |= BIT_1;
3254         if (tgt->tgt_stop)
3255                 goto out_term;
3256
3257         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3258         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3259         cmd->unpacked_lun = scsilun_to_int(
3260             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3261
3262         if (atio->u.isp24.fcp_cmnd.rddata &&
3263             atio->u.isp24.fcp_cmnd.wrdata) {
3264                 bidi = 1;
3265                 data_dir = DMA_TO_DEVICE;
3266         } else if (atio->u.isp24.fcp_cmnd.rddata)
3267                 data_dir = DMA_FROM_DEVICE;
3268         else if (atio->u.isp24.fcp_cmnd.wrdata)
3269                 data_dir = DMA_TO_DEVICE;
3270         else
3271                 data_dir = DMA_NONE;
3272
3273         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3274             atio->u.isp24.fcp_cmnd.task_attr);
3275         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3276             &atio->u.isp24.fcp_cmnd.add_cdb[
3277             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3278
3279         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3280                                           fcp_task_attr, data_dir, bidi);
3281         if (ret != 0)
3282                 goto out_term;
3283         /*
3284          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3285          */
3286         spin_lock_irqsave(&ha->hardware_lock, flags);
3287         ha->tgt.tgt_ops->put_sess(sess);
3288         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3289         return;
3290
3291 out_term:
3292         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3293         /*
3294          * cmd has not sent to target yet, so pass NULL as the second
3295          * argument to qlt_send_term_exchange() and free the memory here.
3296          */
3297         cmd->cmd_flags |= BIT_2;
3298         spin_lock_irqsave(&ha->hardware_lock, flags);
3299         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3300
3301         qlt_decr_num_pend_cmds(vha);
3302         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3303         ha->tgt.tgt_ops->put_sess(sess);
3304         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3305 }
3306
3307 static void qlt_do_work(struct work_struct *work)
3308 {
3309         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3310
3311         __qlt_do_work(cmd);
3312 }
3313
3314 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3315                                        struct qla_tgt_sess *sess,
3316                                        struct atio_from_isp *atio)
3317 {
3318         struct se_session *se_sess = sess->se_sess;
3319         struct qla_tgt_cmd *cmd;
3320         int tag;
3321
3322         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3323         if (tag < 0)
3324                 return NULL;
3325
3326         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3327         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3328
3329         memcpy(&cmd->atio, atio, sizeof(*atio));
3330         cmd->state = QLA_TGT_STATE_NEW;
3331         cmd->tgt = vha->vha_tgt.qla_tgt;
3332         qlt_incr_num_pend_cmds(vha);
3333         cmd->vha = vha;
3334         cmd->se_cmd.map_tag = tag;
3335         cmd->sess = sess;
3336         cmd->loop_id = sess->loop_id;
3337         cmd->conf_compl_supported = sess->conf_compl_supported;
3338
3339         return cmd;
3340 }
3341
3342 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3343                           uint16_t);
3344
3345 static void qlt_create_sess_from_atio(struct work_struct *work)
3346 {
3347         struct qla_tgt_sess_op *op = container_of(work,
3348                                         struct qla_tgt_sess_op, work);
3349         scsi_qla_host_t *vha = op->vha;
3350         struct qla_hw_data *ha = vha->hw;
3351         struct qla_tgt_sess *sess;
3352         struct qla_tgt_cmd *cmd;
3353         unsigned long flags;
3354         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3355
3356         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3357                 "qla_target(%d): Unable to find wwn login"
3358                 " (s_id %x:%x:%x), trying to create it manually\n",
3359                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3360
3361         if (op->atio.u.raw.entry_count > 1) {
3362                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3363                         "Dropping multy entry atio %p\n", &op->atio);
3364                 goto out_term;
3365         }
3366
3367         mutex_lock(&vha->vha_tgt.tgt_mutex);
3368         sess = qlt_make_local_sess(vha, s_id);
3369         /* sess has an extra creation ref. */
3370         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3371
3372         if (!sess)
3373                 goto out_term;
3374         /*
3375          * Now obtain a pre-allocated session tag using the original op->atio
3376          * packet header, and dispatch into __qlt_do_work() using the existing
3377          * process context.
3378          */
3379         cmd = qlt_get_tag(vha, sess, &op->atio);
3380         if (!cmd) {
3381                 spin_lock_irqsave(&ha->hardware_lock, flags);
3382                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3383                 ha->tgt.tgt_ops->put_sess(sess);
3384                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3385                 kfree(op);
3386                 return;
3387         }
3388         /*
3389          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3390          * the extra reference taken above by qlt_make_local_sess()
3391          */
3392         __qlt_do_work(cmd);
3393         kfree(op);
3394         return;
3395
3396 out_term:
3397         spin_lock_irqsave(&ha->hardware_lock, flags);
3398         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3399         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3400         kfree(op);
3401
3402 }
3403
3404 /* ha->hardware_lock supposed to be held on entry */
3405 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3406         struct atio_from_isp *atio)
3407 {
3408         struct qla_hw_data *ha = vha->hw;
3409         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3410         struct qla_tgt_sess *sess;
3411         struct qla_tgt_cmd *cmd;
3412
3413         if (unlikely(tgt->tgt_stop)) {
3414                 ql_dbg(ql_dbg_io, vha, 0x3061,
3415                     "New command while device %p is shutting down\n", tgt);
3416                 return -EFAULT;
3417         }
3418
3419         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3420         if (unlikely(!sess)) {
3421                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3422                                                      GFP_ATOMIC);
3423                 if (!op)
3424                         return -ENOMEM;
3425
3426                 memcpy(&op->atio, atio, sizeof(*atio));
3427                 op->vha = vha;
3428                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3429                 queue_work(qla_tgt_wq, &op->work);
3430                 return 0;
3431         }
3432         /*
3433          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3434          */
3435         kref_get(&sess->se_sess->sess_kref);
3436
3437         cmd = qlt_get_tag(vha, sess, atio);
3438         if (!cmd) {
3439                 ql_dbg(ql_dbg_io, vha, 0x3062,
3440                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3441                 ha->tgt.tgt_ops->put_sess(sess);
3442                 return -ENOMEM;
3443         }
3444
3445         cmd->cmd_flags = 0;
3446         cmd->jiffies_at_alloc = get_jiffies_64();
3447
3448         cmd->reset_count = vha->hw->chip_reset;
3449
3450         cmd->cmd_in_wq = 1;
3451         cmd->cmd_flags |= BIT_0;
3452         INIT_WORK(&cmd->work, qlt_do_work);
3453         queue_work(qla_tgt_wq, &cmd->work);
3454         return 0;
3455
3456 }
3457
3458 /* ha->hardware_lock supposed to be held on entry */
3459 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3460         int fn, void *iocb, int flags)
3461 {
3462         struct scsi_qla_host *vha = sess->vha;
3463         struct qla_hw_data *ha = vha->hw;
3464         struct qla_tgt_mgmt_cmd *mcmd;
3465         int res;
3466         uint8_t tmr_func;
3467
3468         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3469         if (!mcmd) {
3470                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3471                     "qla_target(%d): Allocation of management "
3472                     "command failed, some commands and their data could "
3473                     "leak\n", vha->vp_idx);
3474                 return -ENOMEM;
3475         }
3476         memset(mcmd, 0, sizeof(*mcmd));
3477         mcmd->sess = sess;
3478
3479         if (iocb) {
3480                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3481                     sizeof(mcmd->orig_iocb.imm_ntfy));
3482         }
3483         mcmd->tmr_func = fn;
3484         mcmd->flags = flags;
3485         mcmd->reset_count = vha->hw->chip_reset;
3486
3487         switch (fn) {
3488         case QLA_TGT_CLEAR_ACA:
3489                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3490                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3491                 tmr_func = TMR_CLEAR_ACA;
3492                 break;
3493
3494         case QLA_TGT_TARGET_RESET:
3495                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3496                     "qla_target(%d): TARGET_RESET received\n",
3497                     sess->vha->vp_idx);
3498                 tmr_func = TMR_TARGET_WARM_RESET;
3499                 break;
3500
3501         case QLA_TGT_LUN_RESET:
3502                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3503                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3504                 tmr_func = TMR_LUN_RESET;
3505                 break;
3506
3507         case QLA_TGT_CLEAR_TS:
3508                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3509                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3510                 tmr_func = TMR_CLEAR_TASK_SET;
3511                 break;
3512
3513         case QLA_TGT_ABORT_TS:
3514                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3515                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3516                 tmr_func = TMR_ABORT_TASK_SET;
3517                 break;
3518 #if 0
3519         case QLA_TGT_ABORT_ALL:
3520                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3521                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3522                     sess->vha->vp_idx);
3523                 tmr_func = 0;
3524                 break;
3525
3526         case QLA_TGT_ABORT_ALL_SESS:
3527                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3528                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3529                     sess->vha->vp_idx);
3530                 tmr_func = 0;
3531                 break;
3532
3533         case QLA_TGT_NEXUS_LOSS_SESS:
3534                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3535                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3536                     sess->vha->vp_idx);
3537                 tmr_func = 0;
3538                 break;
3539
3540         case QLA_TGT_NEXUS_LOSS:
3541                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3542                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3543                 tmr_func = 0;
3544                 break;
3545 #endif
3546         default:
3547                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3548                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3549                     sess->vha->vp_idx, fn);
3550                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3551                 return -ENOSYS;
3552         }
3553
3554         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3555         if (res != 0) {
3556                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3557                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3558                     sess->vha->vp_idx, res);
3559                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3560                 return -EFAULT;
3561         }
3562
3563         return 0;
3564 }
3565
3566 /* ha->hardware_lock supposed to be held on entry */
3567 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3568 {
3569         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3570         struct qla_hw_data *ha = vha->hw;
3571         struct qla_tgt *tgt;
3572         struct qla_tgt_sess *sess;
3573         uint32_t lun, unpacked_lun;
3574         int fn;
3575
3576         tgt = vha->vha_tgt.qla_tgt;
3577
3578         lun = a->u.isp24.fcp_cmnd.lun;
3579         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3580         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3581             a->u.isp24.fcp_hdr.s_id);
3582         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3583
3584         if (!sess) {
3585                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3586                     "qla_target(%d): task mgmt fn 0x%x for "
3587                     "non-existant session\n", vha->vp_idx, fn);
3588                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3589                     sizeof(struct atio_from_isp));
3590         }
3591
3592         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3593 }
3594
3595 /* ha->hardware_lock supposed to be held on entry */
3596 static int __qlt_abort_task(struct scsi_qla_host *vha,
3597         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3598 {
3599         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3600         struct qla_hw_data *ha = vha->hw;
3601         struct qla_tgt_mgmt_cmd *mcmd;
3602         uint32_t lun, unpacked_lun;
3603         int rc;
3604
3605         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3606         if (mcmd == NULL) {
3607                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3608                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3609                     vha->vp_idx, __func__);
3610                 return -ENOMEM;
3611         }
3612         memset(mcmd, 0, sizeof(*mcmd));
3613
3614         mcmd->sess = sess;
3615         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3616             sizeof(mcmd->orig_iocb.imm_ntfy));
3617
3618         lun = a->u.isp24.fcp_cmnd.lun;
3619         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3620         mcmd->reset_count = vha->hw->chip_reset;
3621
3622         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3623             le16_to_cpu(iocb->u.isp2x.seq_id));
3624         if (rc != 0) {
3625                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3626                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3627                     vha->vp_idx, rc);
3628                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3629                 return -EFAULT;
3630         }
3631
3632         return 0;
3633 }
3634
3635 /* ha->hardware_lock supposed to be held on entry */
3636 static int qlt_abort_task(struct scsi_qla_host *vha,
3637         struct imm_ntfy_from_isp *iocb)
3638 {
3639         struct qla_hw_data *ha = vha->hw;
3640         struct qla_tgt_sess *sess;
3641         int loop_id;
3642
3643         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3644
3645         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3646         if (sess == NULL) {
3647                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3648                     "qla_target(%d): task abort for unexisting "
3649                     "session\n", vha->vp_idx);
3650                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3651                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3652         }
3653
3654         return __qlt_abort_task(vha, iocb, sess);
3655 }
3656
3657 /*
3658  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3659  */
3660 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3661         struct imm_ntfy_from_isp *iocb)
3662 {
3663         int res = 0;
3664
3665         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3666             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3667             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3668
3669         switch (iocb->u.isp24.status_subcode) {
3670         case ELS_PLOGI:
3671         case ELS_FLOGI:
3672         case ELS_PRLI:
3673         case ELS_LOGO:
3674         case ELS_PRLO:
3675                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3676                 break;
3677         case ELS_PDISC:
3678         case ELS_ADISC:
3679         {
3680                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3681                 if (tgt->link_reinit_iocb_pending) {
3682                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3683                             0, 0, 0, 0, 0, 0);
3684                         tgt->link_reinit_iocb_pending = 0;
3685                 }
3686                 res = 1; /* send notify ack */
3687                 break;
3688         }
3689
3690         default:
3691                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3692                     "qla_target(%d): Unsupported ELS command %x "
3693                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3694                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3695                 break;
3696         }
3697
3698         return res;
3699 }
3700
3701 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3702 {
3703 #if 1
3704         /*
3705          * FIXME: Reject non zero SRR relative offset until we can test
3706          * this code properly.
3707          */
3708         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3709         return -1;
3710 #else
3711         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3712         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3713         int i, sg_srr_cnt, bufflen = 0;
3714
3715         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3716             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3717             "cmd->sg_cnt: %u, direction: %d\n",
3718             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3719
3720         if (!cmd->sg || !cmd->sg_cnt) {
3721                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3722                     "Missing cmd->sg or zero cmd->sg_cnt in"
3723                     " qla_tgt_set_data_offset\n");
3724                 return -EINVAL;
3725         }
3726         /*
3727          * Walk the current cmd->sg list until we locate the new sg_srr_start
3728          */
3729         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3730                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3731                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3732                     i, sg, sg_page(sg), sg->length, sg->offset);
3733
3734                 if ((sg->length + tmp) > offset) {
3735                         first_offset = rem_offset;
3736                         sg_srr_start = sg;
3737                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3738                             "Found matching sg[%d], using %p as sg_srr_start, "
3739                             "and using first_offset: %zu\n", i, sg,
3740                             first_offset);
3741                         break;
3742                 }
3743                 tmp += sg->length;
3744                 rem_offset -= sg->length;
3745         }
3746
3747         if (!sg_srr_start) {
3748                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3749                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3750                 return -EINVAL;
3751         }
3752         sg_srr_cnt = (cmd->sg_cnt - i);
3753
3754         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3755         if (!sg_srr) {
3756                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3757                     "Unable to allocate sgp\n");
3758                 return -ENOMEM;
3759         }
3760         sg_init_table(sg_srr, sg_srr_cnt);
3761         sgp = &sg_srr[0];
3762         /*
3763          * Walk the remaining list for sg_srr_start, mapping to the newly
3764          * allocated sg_srr taking first_offset into account.
3765          */
3766         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3767                 if (first_offset) {
3768                         sg_set_page(sgp, sg_page(sg),
3769                             (sg->length - first_offset), first_offset);
3770                         first_offset = 0;
3771                 } else {
3772                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3773                 }
3774                 bufflen += sgp->length;
3775
3776                 sgp = sg_next(sgp);
3777                 if (!sgp)
3778                         break;
3779         }
3780
3781         cmd->sg = sg_srr;
3782         cmd->sg_cnt = sg_srr_cnt;
3783         cmd->bufflen = bufflen;
3784         cmd->offset += offset;
3785         cmd->free_sg = 1;
3786
3787         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3788         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3789             cmd->sg_cnt);
3790         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3791             cmd->bufflen);
3792         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3793             cmd->offset);
3794
3795         if (cmd->sg_cnt < 0)
3796                 BUG();
3797
3798         if (cmd->bufflen < 0)
3799                 BUG();
3800
3801         return 0;
3802 #endif
3803 }
3804
3805 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3806         uint32_t srr_rel_offs, int *xmit_type)
3807 {
3808         int res = 0, rel_offs;
3809
3810         rel_offs = srr_rel_offs - cmd->offset;
3811         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3812             srr_rel_offs, rel_offs);
3813
3814         *xmit_type = QLA_TGT_XMIT_ALL;
3815
3816         if (rel_offs < 0) {
3817                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3818                     "qla_target(%d): SRR rel_offs (%d) < 0",
3819                     cmd->vha->vp_idx, rel_offs);
3820                 res = -1;
3821         } else if (rel_offs == cmd->bufflen)
3822                 *xmit_type = QLA_TGT_XMIT_STATUS;
3823         else if (rel_offs > 0)
3824                 res = qlt_set_data_offset(cmd, rel_offs);
3825
3826         return res;
3827 }
3828
3829 /* No locks, thread context */
3830 static void qlt_handle_srr(struct scsi_qla_host *vha,
3831         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3832 {
3833         struct imm_ntfy_from_isp *ntfy =
3834             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3835         struct qla_hw_data *ha = vha->hw;
3836         struct qla_tgt_cmd *cmd = sctio->cmd;
3837         struct se_cmd *se_cmd = &cmd->se_cmd;
3838         unsigned long flags;
3839         int xmit_type = 0, resp = 0;
3840         uint32_t offset;
3841         uint16_t srr_ui;
3842
3843         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3844         srr_ui = ntfy->u.isp24.srr_ui;
3845
3846         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3847             cmd, srr_ui);
3848
3849         switch (srr_ui) {
3850         case SRR_IU_STATUS:
3851                 spin_lock_irqsave(&ha->hardware_lock, flags);
3852                 qlt_send_notify_ack(vha, ntfy,
3853                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3854                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3855                 xmit_type = QLA_TGT_XMIT_STATUS;
3856                 resp = 1;
3857                 break;
3858         case SRR_IU_DATA_IN:
3859                 if (!cmd->sg || !cmd->sg_cnt) {
3860                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3861                             "Unable to process SRR_IU_DATA_IN due to"
3862                             " missing cmd->sg, state: %d\n", cmd->state);
3863                         dump_stack();
3864                         goto out_reject;
3865                 }
3866                 if (se_cmd->scsi_status != 0) {
3867                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3868                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3869                             "scsi_status\n");
3870                         goto out_reject;
3871                 }
3872                 cmd->bufflen = se_cmd->data_length;
3873
3874                 if (qlt_has_data(cmd)) {
3875                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3876                                 goto out_reject;
3877                         spin_lock_irqsave(&ha->hardware_lock, flags);
3878                         qlt_send_notify_ack(vha, ntfy,
3879                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3880                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3881                         resp = 1;
3882                 } else {
3883                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3884                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
3885                                vha->vp_idx, se_cmd->tag,
3886                             cmd->se_cmd.scsi_status);
3887                         goto out_reject;
3888                 }
3889                 break;
3890         case SRR_IU_DATA_OUT:
3891                 if (!cmd->sg || !cmd->sg_cnt) {
3892                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3893                             "Unable to process SRR_IU_DATA_OUT due to"
3894                             " missing cmd->sg\n");
3895                         dump_stack();
3896                         goto out_reject;
3897                 }
3898                 if (se_cmd->scsi_status != 0) {
3899                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3900                             "Rejecting SRR_IU_DATA_OUT"
3901                             " with non GOOD scsi_status\n");
3902                         goto out_reject;
3903                 }
3904                 cmd->bufflen = se_cmd->data_length;
3905
3906                 if (qlt_has_data(cmd)) {
3907                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3908                                 goto out_reject;
3909                         spin_lock_irqsave(&ha->hardware_lock, flags);
3910                         qlt_send_notify_ack(vha, ntfy,
3911                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3912                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3913                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3914                                 cmd->cmd_flags |= BIT_8;
3915                                 qlt_rdy_to_xfer(cmd);
3916                         }
3917                 } else {
3918                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3919                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
3920                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
3921                         goto out_reject;
3922                 }
3923                 break;
3924         default:
3925                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3926                     "qla_target(%d): Unknown srr_ui value %x",
3927                     vha->vp_idx, srr_ui);
3928                 goto out_reject;
3929         }
3930
3931         /* Transmit response in case of status and data-in cases */
3932         if (resp) {
3933                 cmd->cmd_flags |= BIT_7;
3934                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3935         }
3936
3937         return;
3938
3939 out_reject:
3940         spin_lock_irqsave(&ha->hardware_lock, flags);
3941         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3942             NOTIFY_ACK_SRR_FLAGS_REJECT,
3943             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3944             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3945         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3946                 cmd->state = QLA_TGT_STATE_DATA_IN;
3947                 dump_stack();
3948         } else {
3949                 cmd->cmd_flags |= BIT_9;
3950                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3951         }
3952         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3953 }
3954
3955 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3956         struct qla_tgt_srr_imm *imm, int ha_locked)
3957 {
3958         struct qla_hw_data *ha = vha->hw;
3959         unsigned long flags = 0;
3960
3961         if (!ha_locked)
3962                 spin_lock_irqsave(&ha->hardware_lock, flags);
3963
3964         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3965             NOTIFY_ACK_SRR_FLAGS_REJECT,
3966             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3967             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3968
3969         if (!ha_locked)
3970                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3971
3972         kfree(imm);
3973 }
3974
3975 static void qlt_handle_srr_work(struct work_struct *work)
3976 {
3977         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3978         struct scsi_qla_host *vha = tgt->vha;
3979         struct qla_tgt_srr_ctio *sctio;
3980         unsigned long flags;
3981
3982         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3983             tgt);
3984
3985 restart:
3986         spin_lock_irqsave(&tgt->srr_lock, flags);
3987         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3988                 struct qla_tgt_srr_imm *imm, *i, *ti;
3989                 struct qla_tgt_cmd *cmd;
3990                 struct se_cmd *se_cmd;
3991
3992                 imm = NULL;
3993                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3994                                                 srr_list_entry) {
3995                         if (i->srr_id == sctio->srr_id) {
3996                                 list_del(&i->srr_list_entry);
3997                                 if (imm) {
3998                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3999                                           "qla_target(%d): There must be "
4000                                           "only one IMM SRR per CTIO SRR "
4001                                           "(IMM SRR %p, id %d, CTIO %p\n",
4002                                           vha->vp_idx, i, i->srr_id, sctio);
4003                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4004                                 } else
4005                                         imm = i;
4006                         }
4007                 }
4008
4009                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4010                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4011                     sctio->srr_id);
4012
4013                 if (imm == NULL) {
4014                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4015                             "Not found matching IMM for SRR CTIO (id %d)\n",
4016                             sctio->srr_id);
4017                         continue;
4018                 } else
4019                         list_del(&sctio->srr_list_entry);
4020
4021                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4022
4023                 cmd = sctio->cmd;
4024                 /*
4025                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4026                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4027                  * logic..
4028                  */
4029                 cmd->offset = 0;
4030                 if (cmd->free_sg) {
4031                         kfree(cmd->sg);
4032                         cmd->sg = NULL;
4033                         cmd->free_sg = 0;
4034                 }
4035                 se_cmd = &cmd->se_cmd;
4036
4037                 cmd->sg_cnt = se_cmd->t_data_nents;
4038                 cmd->sg = se_cmd->t_data_sg;
4039
4040                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4041                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4042                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4043                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4044
4045                 qlt_handle_srr(vha, sctio, imm);
4046
4047                 kfree(imm);
4048                 kfree(sctio);
4049                 goto restart;
4050         }
4051         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4052 }
4053
4054 /* ha->hardware_lock supposed to be held on entry */
4055 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4056         struct imm_ntfy_from_isp *iocb)
4057 {
4058         struct qla_tgt_srr_imm *imm;
4059         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4060         struct qla_tgt_srr_ctio *sctio;
4061
4062         tgt->imm_srr_id++;
4063
4064         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4065             vha->vp_idx);
4066
4067         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4068         if (imm != NULL) {
4069                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4070
4071                 /* IRQ is already OFF */
4072                 spin_lock(&tgt->srr_lock);
4073                 imm->srr_id = tgt->imm_srr_id;
4074                 list_add_tail(&imm->srr_list_entry,
4075                     &tgt->srr_imm_list);
4076                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4077                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4078                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4079                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4080                         int found = 0;
4081                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4082                             srr_list_entry) {
4083                                 if (sctio->srr_id == imm->srr_id) {
4084                                         found = 1;
4085                                         break;
4086                                 }
4087                         }
4088                         if (found) {
4089                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4090                                     "Scheduling srr work\n");
4091                                 schedule_work(&tgt->srr_work);
4092                         } else {
4093                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4094                                     "qla_target(%d): imm_srr_id "
4095                                     "== ctio_srr_id (%d), but there is no "
4096                                     "corresponding SRR CTIO, deleting IMM "
4097                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4098                                     imm);
4099                                 list_del(&imm->srr_list_entry);
4100
4101                                 kfree(imm);
4102
4103                                 spin_unlock(&tgt->srr_lock);
4104                                 goto out_reject;
4105                         }
4106                 }
4107                 spin_unlock(&tgt->srr_lock);
4108         } else {
4109                 struct qla_tgt_srr_ctio *ts;
4110
4111                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4112                     "qla_target(%d): Unable to allocate SRR IMM "
4113                     "entry, SRR request will be rejected\n", vha->vp_idx);
4114
4115                 /* IRQ is already OFF */
4116                 spin_lock(&tgt->srr_lock);
4117                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4118                     srr_list_entry) {
4119                         if (sctio->srr_id == tgt->imm_srr_id) {
4120                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4121                                     "CTIO SRR %p deleted (id %d)\n",
4122                                     sctio, sctio->srr_id);
4123                                 list_del(&sctio->srr_list_entry);
4124                                 qlt_send_term_exchange(vha, sctio->cmd,
4125                                     &sctio->cmd->atio, 1);
4126                                 kfree(sctio);
4127                         }
4128                 }
4129                 spin_unlock(&tgt->srr_lock);
4130                 goto out_reject;
4131         }
4132
4133         return;
4134
4135 out_reject:
4136         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4137             NOTIFY_ACK_SRR_FLAGS_REJECT,
4138             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4139             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4140 }
4141
4142 /*
4143  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4144  */
4145 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4146         struct imm_ntfy_from_isp *iocb)
4147 {
4148         struct qla_hw_data *ha = vha->hw;
4149         uint32_t add_flags = 0;
4150         int send_notify_ack = 1;
4151         uint16_t status;
4152
4153         status = le16_to_cpu(iocb->u.isp2x.status);
4154         switch (status) {
4155         case IMM_NTFY_LIP_RESET:
4156         {
4157                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4158                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4159                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4160                     iocb->u.isp24.status_subcode);
4161
4162                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4163                         send_notify_ack = 0;
4164                 break;
4165         }
4166
4167         case IMM_NTFY_LIP_LINK_REINIT:
4168         {
4169                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4171                     "qla_target(%d): LINK REINIT (loop %#x, "
4172                     "subcode %x)\n", vha->vp_idx,
4173                     le16_to_cpu(iocb->u.isp24.nport_handle),
4174                     iocb->u.isp24.status_subcode);
4175                 if (tgt->link_reinit_iocb_pending) {
4176                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4177                             0, 0, 0, 0, 0, 0);
4178                 }
4179                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4180                 tgt->link_reinit_iocb_pending = 1;
4181                 /*
4182                  * QLogic requires to wait after LINK REINIT for possible
4183                  * PDISC or ADISC ELS commands
4184                  */
4185                 send_notify_ack = 0;
4186                 break;
4187         }
4188
4189         case IMM_NTFY_PORT_LOGOUT:
4190                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4191                     "qla_target(%d): Port logout (loop "
4192                     "%#x, subcode %x)\n", vha->vp_idx,
4193                     le16_to_cpu(iocb->u.isp24.nport_handle),
4194                     iocb->u.isp24.status_subcode);
4195
4196                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4197                         send_notify_ack = 0;
4198                 /* The sessions will be cleared in the callback, if needed */
4199                 break;
4200
4201         case IMM_NTFY_GLBL_TPRLO:
4202                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4203                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4204                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4205                         send_notify_ack = 0;
4206                 /* The sessions will be cleared in the callback, if needed */
4207                 break;
4208
4209         case IMM_NTFY_PORT_CONFIG:
4210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4211                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4212                     status);
4213                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4214                         send_notify_ack = 0;
4215                 /* The sessions will be cleared in the callback, if needed */
4216                 break;
4217
4218         case IMM_NTFY_GLBL_LOGO:
4219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4220                     "qla_target(%d): Link failure detected\n",
4221                     vha->vp_idx);
4222                 /* I_T nexus loss */
4223                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4224                         send_notify_ack = 0;
4225                 break;
4226
4227         case IMM_NTFY_IOCB_OVERFLOW:
4228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4229                     "qla_target(%d): Cannot provide requested "
4230                     "capability (IOCB overflowed the immediate notify "
4231                     "resource count)\n", vha->vp_idx);
4232                 break;
4233
4234         case IMM_NTFY_ABORT_TASK:
4235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4236                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4237                     "L %#x)\n", vha->vp_idx,
4238                     le16_to_cpu(iocb->u.isp2x.seq_id),
4239                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4240                     le16_to_cpu(iocb->u.isp2x.lun));
4241                 if (qlt_abort_task(vha, iocb) == 0)
4242                         send_notify_ack = 0;
4243                 break;
4244
4245         case IMM_NTFY_RESOURCE:
4246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4247                     "qla_target(%d): Out of resources, host %ld\n",
4248                     vha->vp_idx, vha->host_no);
4249                 break;
4250
4251         case IMM_NTFY_MSG_RX:
4252                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4253                     "qla_target(%d): Immediate notify task %x\n",
4254                     vha->vp_idx, iocb->u.isp2x.task_flags);
4255                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4256                         send_notify_ack = 0;
4257                 break;
4258
4259         case IMM_NTFY_ELS:
4260                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4261                         send_notify_ack = 0;
4262                 break;
4263
4264         case IMM_NTFY_SRR:
4265                 qlt_prepare_srr_imm(vha, iocb);
4266                 send_notify_ack = 0;
4267                 break;
4268
4269         default:
4270                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4271                     "qla_target(%d): Received unknown immediate "
4272                     "notify status %x\n", vha->vp_idx, status);
4273                 break;
4274         }
4275
4276         if (send_notify_ack)
4277                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4278 }
4279
4280 /*
4281  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4282  * This function sends busy to ISP 2xxx or 24xx.
4283  */
4284 static int __qlt_send_busy(struct scsi_qla_host *vha,
4285         struct atio_from_isp *atio, uint16_t status)
4286 {
4287         struct ctio7_to_24xx *ctio24;
4288         struct qla_hw_data *ha = vha->hw;
4289         request_t *pkt;
4290         struct qla_tgt_sess *sess = NULL;
4291
4292         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4293             atio->u.isp24.fcp_hdr.s_id);
4294         if (!sess) {
4295                 qlt_send_term_exchange(vha, NULL, atio, 1);
4296                 return 0;
4297         }
4298         /* Sending marker isn't necessary, since we called from ISR */
4299
4300         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4301         if (!pkt) {
4302                 ql_dbg(ql_dbg_io, vha, 0x3063,
4303                     "qla_target(%d): %s failed: unable to allocate "
4304                     "request packet", vha->vp_idx, __func__);
4305                 return -ENOMEM;
4306         }
4307
4308         pkt->entry_count = 1;
4309         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4310
4311         ctio24 = (struct ctio7_to_24xx *)pkt;
4312         ctio24->entry_type = CTIO_TYPE7;
4313         ctio24->nport_handle = sess->loop_id;
4314         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4315         ctio24->vp_index = vha->vp_idx;
4316         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4317         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4318         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4319         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4320         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4321             __constant_cpu_to_le16(
4322                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4323                 CTIO7_FLAGS_DONT_RET_CTIO);
4324         /*
4325          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4326          * if the explicit conformation is used.
4327          */
4328         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4329         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4330         /* Memory Barrier */
4331         wmb();
4332         qla2x00_start_iocbs(vha, vha->req);
4333         return 0;
4334 }
4335
4336 /*
4337  * This routine is used to allocate a command for either a QFull condition
4338  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4339  * out previously.
4340  */
4341 static void
4342 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4343         struct atio_from_isp *atio, uint16_t status, int qfull)
4344 {
4345         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4346         struct qla_hw_data *ha = vha->hw;
4347         struct qla_tgt_sess *sess;
4348         struct se_session *se_sess;
4349         struct qla_tgt_cmd *cmd;
4350         int tag;
4351
4352         if (unlikely(tgt->tgt_stop)) {
4353                 ql_dbg(ql_dbg_io, vha, 0x300a,
4354                         "New command while device %p is shutting down\n", tgt);
4355                 return;
4356         }
4357
4358         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4359                 vha->hw->tgt.num_qfull_cmds_dropped++;
4360                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4361                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4362                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4363                                 vha->hw->tgt.num_qfull_cmds_dropped;
4364
4365                 ql_dbg(ql_dbg_io, vha, 0x3068,
4366                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4367                         vha->vp_idx, __func__,
4368                         vha->hw->tgt.num_qfull_cmds_dropped);
4369
4370                 qlt_chk_exch_leak_thresh_hold(vha);
4371                 return;
4372         }
4373
4374         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4375                 (vha, atio->u.isp24.fcp_hdr.s_id);
4376         if (!sess)
4377                 return;
4378
4379         se_sess = sess->se_sess;
4380
4381         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4382         if (tag < 0)
4383                 return;
4384
4385         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4386         if (!cmd) {
4387                 ql_dbg(ql_dbg_io, vha, 0x3009,
4388                         "qla_target(%d): %s: Allocation of cmd failed\n",
4389                         vha->vp_idx, __func__);
4390
4391                 vha->hw->tgt.num_qfull_cmds_dropped++;
4392                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4393                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4394                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4395                                 vha->hw->tgt.num_qfull_cmds_dropped;
4396
4397                 qlt_chk_exch_leak_thresh_hold(vha);
4398                 return;
4399         }
4400
4401         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4402
4403         qlt_incr_num_pend_cmds(vha);
4404         INIT_LIST_HEAD(&cmd->cmd_list);
4405         memcpy(&cmd->atio, atio, sizeof(*atio));
4406
4407         cmd->tgt = vha->vha_tgt.qla_tgt;
4408         cmd->vha = vha;
4409         cmd->reset_count = vha->hw->chip_reset;
4410         cmd->q_full = 1;
4411
4412         if (qfull) {
4413                 cmd->q_full = 1;
4414                 /* NOTE: borrowing the state field to carry the status */
4415                 cmd->state = status;
4416         } else
4417                 cmd->term_exchg = 1;
4418
4419         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4420
4421         vha->hw->tgt.num_qfull_cmds_alloc++;
4422         if (vha->hw->tgt.num_qfull_cmds_alloc >
4423                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4424                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4425                         vha->hw->tgt.num_qfull_cmds_alloc;
4426 }
4427
4428 int
4429 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4430 {
4431         struct qla_hw_data *ha = vha->hw;
4432         unsigned long flags;
4433         struct qla_tgt_cmd *cmd, *tcmd;
4434         struct list_head free_list;
4435         int rc = 0;
4436
4437         if (list_empty(&ha->tgt.q_full_list))
4438                 return 0;
4439
4440         INIT_LIST_HEAD(&free_list);
4441
4442         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4443
4444         if (list_empty(&ha->tgt.q_full_list)) {
4445                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4446                 return 0;
4447         }
4448
4449         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4450                 if (cmd->q_full)
4451                         /* cmd->state is a borrowed field to hold status */
4452                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4453                 else if (cmd->term_exchg)
4454                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4455
4456                 if (rc == -ENOMEM)
4457                         break;
4458
4459                 if (cmd->q_full)
4460                         ql_dbg(ql_dbg_io, vha, 0x3006,
4461                             "%s: busy sent for ox_id[%04x]\n", __func__,
4462                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4463                 else if (cmd->term_exchg)
4464                         ql_dbg(ql_dbg_io, vha, 0x3007,
4465                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4466                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4467                 else
4468                         ql_dbg(ql_dbg_io, vha, 0x3008,
4469                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4470                             cmd);
4471
4472                 list_del(&cmd->cmd_list);
4473                 list_add_tail(&cmd->cmd_list, &free_list);
4474
4475                 /* piggy back on hardware_lock for protection */
4476                 vha->hw->tgt.num_qfull_cmds_alloc--;
4477         }
4478         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4479
4480         cmd = NULL;
4481
4482         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4483                 list_del(&cmd->cmd_list);
4484                 /* This cmd was never sent to TCM.  There is no need
4485                  * to schedule free or call free_cmd
4486                  */
4487                 qlt_free_cmd(cmd);
4488         }
4489         return rc;
4490 }
4491
4492 static void
4493 qlt_send_busy(struct scsi_qla_host *vha,
4494         struct atio_from_isp *atio, uint16_t status)
4495 {
4496         int rc = 0;
4497
4498         rc = __qlt_send_busy(vha, atio, status);
4499         if (rc == -ENOMEM)
4500                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4501 }
4502
4503 static int
4504 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4505         struct atio_from_isp *atio)
4506 {
4507         struct qla_hw_data *ha = vha->hw;
4508         uint16_t status;
4509
4510         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4511                 return 0;
4512
4513         status = temp_sam_status;
4514         qlt_send_busy(vha, atio, status);
4515         return 1;
4516 }
4517
4518 /* ha->hardware_lock supposed to be held on entry */
4519 /* called via callback from qla2xxx */
4520 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4521         struct atio_from_isp *atio)
4522 {
4523         struct qla_hw_data *ha = vha->hw;
4524         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4525         int rc;
4526
4527         if (unlikely(tgt == NULL)) {
4528                 ql_dbg(ql_dbg_io, vha, 0x3064,
4529                     "ATIO pkt, but no tgt (ha %p)", ha);
4530                 return;
4531         }
4532         /*
4533          * In tgt_stop mode we also should allow all requests to pass.
4534          * Otherwise, some commands can stuck.
4535          */
4536
4537         tgt->irq_cmd_count++;
4538
4539         switch (atio->u.raw.entry_type) {
4540         case ATIO_TYPE7:
4541                 if (unlikely(atio->u.isp24.exchange_addr ==
4542                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4543                         ql_dbg(ql_dbg_io, vha, 0x3065,
4544                             "qla_target(%d): ATIO_TYPE7 "
4545                             "received with UNKNOWN exchange address, "
4546                             "sending QUEUE_FULL\n", vha->vp_idx);
4547                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4548                         break;
4549                 }
4550
4551
4552
4553                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4554                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4555                         if (rc != 0) {
4556                                 tgt->irq_cmd_count--;
4557                                 return;
4558                         }
4559                         rc = qlt_handle_cmd_for_atio(vha, atio);
4560                 } else {
4561                         rc = qlt_handle_task_mgmt(vha, atio);
4562                 }
4563                 if (unlikely(rc != 0)) {
4564                         if (rc == -ESRCH) {
4565 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4566                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4567 #else
4568                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4569 #endif
4570                         } else {
4571                                 if (tgt->tgt_stop) {
4572                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4573                                             "qla_target: Unable to send "
4574                                             "command to target for req, "
4575                                             "ignoring.\n");
4576                                 } else {
4577                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4578                                             "qla_target(%d): Unable to send "
4579                                             "command to target, sending BUSY "
4580                                             "status.\n", vha->vp_idx);
4581                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4582                                 }
4583                         }
4584                 }
4585                 break;
4586
4587         case IMMED_NOTIFY_TYPE:
4588         {
4589                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4590                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4591                             "qla_target(%d): Received ATIO packet %x "
4592                             "with error status %x\n", vha->vp_idx,
4593                             atio->u.raw.entry_type,
4594                             atio->u.isp2x.entry_status);
4595                         break;
4596                 }
4597                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4598                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4599                 break;
4600         }
4601
4602         default:
4603                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4604                     "qla_target(%d): Received unknown ATIO atio "
4605                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4606                 break;
4607         }
4608
4609         tgt->irq_cmd_count--;
4610 }
4611
4612 /* ha->hardware_lock supposed to be held on entry */
4613 /* called via callback from qla2xxx */
4614 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4615 {
4616         struct qla_hw_data *ha = vha->hw;
4617         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4618
4619         if (unlikely(tgt == NULL)) {
4620                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4621                     "qla_target(%d): Response pkt %x received, but no "
4622                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4623                 return;
4624         }
4625
4626         /*
4627          * In tgt_stop mode we also should allow all requests to pass.
4628          * Otherwise, some commands can stuck.
4629          */
4630
4631         tgt->irq_cmd_count++;
4632
4633         switch (pkt->entry_type) {
4634         case CTIO_CRC2:
4635         case CTIO_TYPE7:
4636         {
4637                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4638                 qlt_do_ctio_completion(vha, entry->handle,
4639                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4640                     entry);
4641                 break;
4642         }
4643
4644         case ACCEPT_TGT_IO_TYPE:
4645         {
4646                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4647                 int rc;
4648                 if (atio->u.isp2x.status !=
4649                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4650                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4651                             "qla_target(%d): ATIO with error "
4652                             "status %x received\n", vha->vp_idx,
4653                             le16_to_cpu(atio->u.isp2x.status));
4654                         break;
4655                 }
4656
4657                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4658                 if (rc != 0) {
4659                         tgt->irq_cmd_count--;
4660                         return;
4661                 }
4662
4663                 rc = qlt_handle_cmd_for_atio(vha, atio);
4664                 if (unlikely(rc != 0)) {
4665                         if (rc == -ESRCH) {
4666 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4667                                 qlt_send_busy(vha, atio, 0);
4668 #else
4669                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4670 #endif
4671                         } else {
4672                                 if (tgt->tgt_stop) {
4673                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4674                                             "qla_target: Unable to send "
4675                                             "command to target, sending TERM "
4676                                             "EXCHANGE for rsp\n");
4677                                         qlt_send_term_exchange(vha, NULL,
4678                                             atio, 1);
4679                                 } else {
4680                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4681                                             "qla_target(%d): Unable to send "
4682                                             "command to target, sending BUSY "
4683                                             "status\n", vha->vp_idx);
4684                                         qlt_send_busy(vha, atio, 0);
4685                                 }
4686                         }
4687                 }
4688         }
4689         break;
4690
4691         case CONTINUE_TGT_IO_TYPE:
4692         {
4693                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4694                 qlt_do_ctio_completion(vha, entry->handle,
4695                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4696                     entry);
4697                 break;
4698         }
4699
4700         case CTIO_A64_TYPE:
4701         {
4702                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4703                 qlt_do_ctio_completion(vha, entry->handle,
4704                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4705                     entry);
4706                 break;
4707         }
4708
4709         case IMMED_NOTIFY_TYPE:
4710                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4711                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4712                 break;
4713
4714         case NOTIFY_ACK_TYPE:
4715                 if (tgt->notify_ack_expected > 0) {
4716                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4717                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4718                             "NOTIFY_ACK seq %08x status %x\n",
4719                             le16_to_cpu(entry->u.isp2x.seq_id),
4720                             le16_to_cpu(entry->u.isp2x.status));
4721                         tgt->notify_ack_expected--;
4722                         if (entry->u.isp2x.status !=
4723                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4724                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4725                                     "qla_target(%d): NOTIFY_ACK "
4726                                     "failed %x\n", vha->vp_idx,
4727                                     le16_to_cpu(entry->u.isp2x.status));
4728                         }
4729                 } else {
4730                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4731                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4732                             vha->vp_idx);
4733                 }
4734                 break;
4735
4736         case ABTS_RECV_24XX:
4737                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4738                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4739                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4740                 break;
4741
4742         case ABTS_RESP_24XX:
4743                 if (tgt->abts_resp_expected > 0) {
4744                         struct abts_resp_from_24xx_fw *entry =
4745                                 (struct abts_resp_from_24xx_fw *)pkt;
4746                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4747                             "ABTS_RESP_24XX: compl_status %x\n",
4748                             entry->compl_status);
4749                         tgt->abts_resp_expected--;
4750                         if (le16_to_cpu(entry->compl_status) !=
4751                             ABTS_RESP_COMPL_SUCCESS) {
4752                                 if ((entry->error_subcode1 == 0x1E) &&
4753                                     (entry->error_subcode2 == 0)) {
4754                                         /*
4755                                          * We've got a race here: aborted
4756                                          * exchange not terminated, i.e.
4757                                          * response for the aborted command was
4758                                          * sent between the abort request was
4759                                          * received and processed.
4760                                          * Unfortunately, the firmware has a
4761                                          * silly requirement that all aborted
4762                                          * exchanges must be explicitely
4763                                          * terminated, otherwise it refuses to
4764                                          * send responses for the abort
4765                                          * requests. So, we have to
4766                                          * (re)terminate the exchange and retry
4767                                          * the abort response.
4768                                          */
4769                                         qlt_24xx_retry_term_exchange(vha,
4770                                             entry);
4771                                 } else
4772                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4773                                             "qla_target(%d): ABTS_RESP_24XX "
4774                                             "failed %x (subcode %x:%x)",
4775                                             vha->vp_idx, entry->compl_status,
4776                                             entry->error_subcode1,
4777                                             entry->error_subcode2);
4778                         }
4779                 } else {
4780                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4781                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4782                             "received\n", vha->vp_idx);
4783                 }
4784                 break;
4785
4786         default:
4787                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4788                     "qla_target(%d): Received unknown response pkt "
4789                     "type %x\n", vha->vp_idx, pkt->entry_type);
4790                 break;
4791         }
4792
4793         tgt->irq_cmd_count--;
4794 }
4795
4796 /*
4797  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4798  */
4799 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4800         uint16_t *mailbox)
4801 {
4802         struct qla_hw_data *ha = vha->hw;
4803         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4804         int login_code;
4805
4806         if (!ha->tgt.tgt_ops)
4807                 return;
4808
4809         if (unlikely(tgt == NULL)) {
4810                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4811                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4812                 return;
4813         }
4814
4815         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4816             IS_QLA2100(ha))
4817                 return;
4818         /*
4819          * In tgt_stop mode we also should allow all requests to pass.
4820          * Otherwise, some commands can stuck.
4821          */
4822
4823         tgt->irq_cmd_count++;
4824
4825         switch (code) {
4826         case MBA_RESET:                 /* Reset */
4827         case MBA_SYSTEM_ERR:            /* System Error */
4828         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4829         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4830                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4831                     "qla_target(%d): System error async event %#x "
4832                     "occurred", vha->vp_idx, code);
4833                 break;
4834         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4835                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4836                 break;
4837
4838         case MBA_LOOP_UP:
4839         {
4840                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4841                     "qla_target(%d): Async LOOP_UP occurred "
4842                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4843                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4844                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4845                 if (tgt->link_reinit_iocb_pending) {
4846                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4847                             0, 0, 0, 0, 0, 0);
4848                         tgt->link_reinit_iocb_pending = 0;
4849                 }
4850                 break;
4851         }
4852
4853         case MBA_LIP_OCCURRED:
4854         case MBA_LOOP_DOWN:
4855         case MBA_LIP_RESET:
4856         case MBA_RSCN_UPDATE:
4857                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4858                     "qla_target(%d): Async event %#x occurred "
4859                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4860                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4861                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4862                 break;
4863
4864         case MBA_PORT_UPDATE:
4865                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4866                     "qla_target(%d): Port update async event %#x "
4867                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4868                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4869                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4870                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4871
4872                 login_code = le16_to_cpu(mailbox[2]);
4873                 if (login_code == 0x4)
4874                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4875                             "Async MB 2: Got PLOGI Complete\n");
4876                 else if (login_code == 0x7)
4877                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4878                             "Async MB 2: Port Logged Out\n");
4879                 break;
4880
4881         default:
4882                 break;
4883         }
4884
4885         tgt->irq_cmd_count--;
4886 }
4887
4888 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4889         uint16_t loop_id)
4890 {
4891         fc_port_t *fcport;
4892         int rc;
4893
4894         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4895         if (!fcport) {
4896                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4897                     "qla_target(%d): Allocation of tmp FC port failed",
4898                     vha->vp_idx);
4899                 return NULL;
4900         }
4901
4902         fcport->loop_id = loop_id;
4903
4904         rc = qla2x00_get_port_database(vha, fcport, 0);
4905         if (rc != QLA_SUCCESS) {
4906                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4907                     "qla_target(%d): Failed to retrieve fcport "
4908                     "information -- get_port_database() returned %x "
4909                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4910                 kfree(fcport);
4911                 return NULL;
4912         }
4913
4914         return fcport;
4915 }
4916
4917 /* Must be called under tgt_mutex */
4918 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4919         uint8_t *s_id)
4920 {
4921         struct qla_tgt_sess *sess = NULL;
4922         fc_port_t *fcport = NULL;
4923         int rc, global_resets;
4924         uint16_t loop_id = 0;
4925
4926 retry:
4927         global_resets =
4928             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4929
4930         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4931         if (rc != 0) {
4932                 if ((s_id[0] == 0xFF) &&
4933                     (s_id[1] == 0xFC)) {
4934                         /*
4935                          * This is Domain Controller, so it should be
4936                          * OK to drop SCSI commands from it.
4937                          */
4938                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4939                             "Unable to find initiator with S_ID %x:%x:%x",
4940                             s_id[0], s_id[1], s_id[2]);
4941                 } else
4942                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4943                             "qla_target(%d): Unable to find "
4944                             "initiator with S_ID %x:%x:%x",
4945                             vha->vp_idx, s_id[0], s_id[1],
4946                             s_id[2]);
4947                 return NULL;
4948         }
4949
4950         fcport = qlt_get_port_database(vha, loop_id);
4951         if (!fcport)
4952                 return NULL;
4953
4954         if (global_resets !=
4955             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4956                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4957                     "qla_target(%d): global reset during session discovery "
4958                     "(counter was %d, new %d), retrying", vha->vp_idx,
4959                     global_resets,
4960                     atomic_read(&vha->vha_tgt.
4961                         qla_tgt->tgt_global_resets_count));
4962                 goto retry;
4963         }
4964
4965         sess = qlt_create_sess(vha, fcport, true);
4966
4967         kfree(fcport);
4968         return sess;
4969 }
4970
4971 static void qlt_abort_work(struct qla_tgt *tgt,
4972         struct qla_tgt_sess_work_param *prm)
4973 {
4974         struct scsi_qla_host *vha = tgt->vha;
4975         struct qla_hw_data *ha = vha->hw;
4976         struct qla_tgt_sess *sess = NULL;
4977         unsigned long flags;
4978         uint32_t be_s_id;
4979         uint8_t s_id[3];
4980         int rc;
4981
4982         spin_lock_irqsave(&ha->hardware_lock, flags);
4983
4984         if (tgt->tgt_stop)
4985                 goto out_term;
4986
4987         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4988         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4989         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4990
4991         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4992             (unsigned char *)&be_s_id);
4993         if (!sess) {
4994                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4995
4996                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4997                 sess = qlt_make_local_sess(vha, s_id);
4998                 /* sess has got an extra creation ref */
4999                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5000
5001                 spin_lock_irqsave(&ha->hardware_lock, flags);
5002                 if (!sess)
5003                         goto out_term;
5004         } else {
5005                 kref_get(&sess->se_sess->sess_kref);
5006         }
5007
5008         if (tgt->tgt_stop)
5009                 goto out_term;
5010
5011         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5012         if (rc != 0)
5013                 goto out_term;
5014
5015         ha->tgt.tgt_ops->put_sess(sess);
5016         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5017         return;
5018
5019 out_term:
5020         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5021         if (sess)
5022                 ha->tgt.tgt_ops->put_sess(sess);
5023         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5024 }
5025
5026 static void qlt_tmr_work(struct qla_tgt *tgt,
5027         struct qla_tgt_sess_work_param *prm)
5028 {
5029         struct atio_from_isp *a = &prm->tm_iocb2;
5030         struct scsi_qla_host *vha = tgt->vha;
5031         struct qla_hw_data *ha = vha->hw;
5032         struct qla_tgt_sess *sess = NULL;
5033         unsigned long flags;
5034         uint8_t *s_id = NULL; /* to hide compiler warnings */
5035         int rc;
5036         uint32_t lun, unpacked_lun;
5037         int fn;
5038         void *iocb;
5039
5040         spin_lock_irqsave(&ha->hardware_lock, flags);
5041
5042         if (tgt->tgt_stop)
5043                 goto out_term;
5044
5045         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5046         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5047         if (!sess) {
5048                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5049
5050                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5051                 sess = qlt_make_local_sess(vha, s_id);
5052                 /* sess has got an extra creation ref */
5053                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5054
5055                 spin_lock_irqsave(&ha->hardware_lock, flags);
5056                 if (!sess)
5057                         goto out_term;
5058         } else {
5059                 kref_get(&sess->se_sess->sess_kref);
5060         }
5061
5062         iocb = a;
5063         lun = a->u.isp24.fcp_cmnd.lun;
5064         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5065         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5066
5067         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5068         if (rc != 0)
5069                 goto out_term;
5070
5071         ha->tgt.tgt_ops->put_sess(sess);
5072         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5073         return;
5074
5075 out_term:
5076         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5077         if (sess)
5078                 ha->tgt.tgt_ops->put_sess(sess);
5079         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5080 }
5081
5082 static void qlt_sess_work_fn(struct work_struct *work)
5083 {
5084         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5085         struct scsi_qla_host *vha = tgt->vha;
5086         unsigned long flags;
5087
5088         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5089
5090         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5091         while (!list_empty(&tgt->sess_works_list)) {
5092                 struct qla_tgt_sess_work_param *prm = list_entry(
5093                     tgt->sess_works_list.next, typeof(*prm),
5094                     sess_works_list_entry);
5095
5096                 /*
5097                  * This work can be scheduled on several CPUs at time, so we
5098                  * must delete the entry to eliminate double processing
5099                  */
5100                 list_del(&prm->sess_works_list_entry);
5101
5102                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5103
5104                 switch (prm->type) {
5105                 case QLA_TGT_SESS_WORK_ABORT:
5106                         qlt_abort_work(tgt, prm);
5107                         break;
5108                 case QLA_TGT_SESS_WORK_TM:
5109                         qlt_tmr_work(tgt, prm);
5110                         break;
5111                 default:
5112                         BUG_ON(1);
5113                         break;
5114                 }
5115
5116                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5117
5118                 kfree(prm);
5119         }
5120         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5121 }
5122
5123 /* Must be called under tgt_host_action_mutex */
5124 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5125 {
5126         struct qla_tgt *tgt;
5127
5128         if (!QLA_TGT_MODE_ENABLED())
5129                 return 0;
5130
5131         if (!IS_TGT_MODE_CAPABLE(ha)) {
5132                 ql_log(ql_log_warn, base_vha, 0xe070,
5133                     "This adapter does not support target mode.\n");
5134                 return 0;
5135         }
5136
5137         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5138             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5139
5140         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5141
5142         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5143         if (!tgt) {
5144                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5145                     "Unable to allocate struct qla_tgt\n");
5146                 return -ENOMEM;
5147         }
5148
5149         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5150                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5151
5152         tgt->ha = ha;
5153         tgt->vha = base_vha;
5154         init_waitqueue_head(&tgt->waitQ);
5155         INIT_LIST_HEAD(&tgt->sess_list);
5156         INIT_LIST_HEAD(&tgt->del_sess_list);
5157         INIT_DELAYED_WORK(&tgt->sess_del_work,
5158                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5159         spin_lock_init(&tgt->sess_work_lock);
5160         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5161         INIT_LIST_HEAD(&tgt->sess_works_list);
5162         spin_lock_init(&tgt->srr_lock);
5163         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5164         INIT_LIST_HEAD(&tgt->srr_imm_list);
5165         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5166         atomic_set(&tgt->tgt_global_resets_count, 0);
5167
5168         base_vha->vha_tgt.qla_tgt = tgt;
5169
5170         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5171                 "qla_target(%d): using 64 Bit PCI addressing",
5172                 base_vha->vp_idx);
5173         tgt->tgt_enable_64bit_addr = 1;
5174         /* 3 is reserved */
5175         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5176         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5177         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5178
5179         if (base_vha->fc_vport)
5180                 return 0;
5181
5182         mutex_lock(&qla_tgt_mutex);
5183         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5184         mutex_unlock(&qla_tgt_mutex);
5185
5186         return 0;
5187 }
5188
5189 /* Must be called under tgt_host_action_mutex */
5190 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5191 {
5192         if (!vha->vha_tgt.qla_tgt)
5193                 return 0;
5194
5195         if (vha->fc_vport) {
5196                 qlt_release(vha->vha_tgt.qla_tgt);
5197                 return 0;
5198         }
5199
5200         /* free left over qfull cmds */
5201         qlt_init_term_exchange(vha);
5202
5203         mutex_lock(&qla_tgt_mutex);
5204         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5205         mutex_unlock(&qla_tgt_mutex);
5206
5207         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5208             vha->host_no, ha);
5209         qlt_release(vha->vha_tgt.qla_tgt);
5210
5211         return 0;
5212 }
5213
5214 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5215         unsigned char *b)
5216 {
5217         int i;
5218
5219         pr_debug("qla2xxx HW vha->node_name: ");
5220         for (i = 0; i < WWN_SIZE; i++)
5221                 pr_debug("%02x ", vha->node_name[i]);
5222         pr_debug("\n");
5223         pr_debug("qla2xxx HW vha->port_name: ");
5224         for (i = 0; i < WWN_SIZE; i++)
5225                 pr_debug("%02x ", vha->port_name[i]);
5226         pr_debug("\n");
5227
5228         pr_debug("qla2xxx passed configfs WWPN: ");
5229         put_unaligned_be64(wwpn, b);
5230         for (i = 0; i < WWN_SIZE; i++)
5231                 pr_debug("%02x ", b[i]);
5232         pr_debug("\n");
5233 }
5234
5235 /**
5236  * qla_tgt_lport_register - register lport with external module
5237  *
5238  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5239  * @wwpn: Passwd FC target WWPN
5240  * @callback:  lport initialization callback for tcm_qla2xxx code
5241  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5242  */
5243 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5244                        u64 npiv_wwpn, u64 npiv_wwnn,
5245                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5246 {
5247         struct qla_tgt *tgt;
5248         struct scsi_qla_host *vha;
5249         struct qla_hw_data *ha;
5250         struct Scsi_Host *host;
5251         unsigned long flags;
5252         int rc;
5253         u8 b[WWN_SIZE];
5254
5255         mutex_lock(&qla_tgt_mutex);
5256         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5257                 vha = tgt->vha;
5258                 ha = vha->hw;
5259
5260                 host = vha->host;
5261                 if (!host)
5262                         continue;
5263
5264                 if (!(host->hostt->supported_mode & MODE_TARGET))
5265                         continue;
5266
5267                 spin_lock_irqsave(&ha->hardware_lock, flags);
5268                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5269                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5270                             host->host_no);
5271                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5272                         continue;
5273                 }
5274                 if (tgt->tgt_stop) {
5275                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5276                                  host->host_no);
5277                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5278                         continue;
5279                 }
5280                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5281
5282                 if (!scsi_host_get(host)) {
5283                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5284                             "Unable to scsi_host_get() for"
5285                             " qla2xxx scsi_host\n");
5286                         continue;
5287                 }
5288                 qlt_lport_dump(vha, phys_wwpn, b);
5289
5290                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5291                         scsi_host_put(host);
5292                         continue;
5293                 }
5294                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5295                 if (rc != 0)
5296                         scsi_host_put(host);
5297
5298                 mutex_unlock(&qla_tgt_mutex);
5299                 return rc;
5300         }
5301         mutex_unlock(&qla_tgt_mutex);
5302
5303         return -ENODEV;
5304 }
5305 EXPORT_SYMBOL(qlt_lport_register);
5306
5307 /**
5308  * qla_tgt_lport_deregister - Degister lport
5309  *
5310  * @vha:  Registered scsi_qla_host pointer
5311  */
5312 void qlt_lport_deregister(struct scsi_qla_host *vha)
5313 {
5314         struct qla_hw_data *ha = vha->hw;
5315         struct Scsi_Host *sh = vha->host;
5316         /*
5317          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5318          */
5319         vha->vha_tgt.target_lport_ptr = NULL;
5320         ha->tgt.tgt_ops = NULL;
5321         /*
5322          * Release the Scsi_Host reference for the underlying qla2xxx host
5323          */
5324         scsi_host_put(sh);
5325 }
5326 EXPORT_SYMBOL(qlt_lport_deregister);
5327
5328 /* Must be called under HW lock */
5329 static void qlt_set_mode(struct scsi_qla_host *vha)
5330 {
5331         struct qla_hw_data *ha = vha->hw;
5332
5333         switch (ql2x_ini_mode) {
5334         case QLA2XXX_INI_MODE_DISABLED:
5335         case QLA2XXX_INI_MODE_EXCLUSIVE:
5336                 vha->host->active_mode = MODE_TARGET;
5337                 break;
5338         case QLA2XXX_INI_MODE_ENABLED:
5339                 vha->host->active_mode |= MODE_TARGET;
5340                 break;
5341         default:
5342                 break;
5343         }
5344
5345         if (ha->tgt.ini_mode_force_reverse)
5346                 qla_reverse_ini_mode(vha);
5347 }
5348
5349 /* Must be called under HW lock */
5350 static void qlt_clear_mode(struct scsi_qla_host *vha)
5351 {
5352         struct qla_hw_data *ha = vha->hw;
5353
5354         switch (ql2x_ini_mode) {
5355         case QLA2XXX_INI_MODE_DISABLED:
5356                 vha->host->active_mode = MODE_UNKNOWN;
5357                 break;
5358         case QLA2XXX_INI_MODE_EXCLUSIVE:
5359                 vha->host->active_mode = MODE_INITIATOR;
5360                 break;
5361         case QLA2XXX_INI_MODE_ENABLED:
5362                 vha->host->active_mode &= ~MODE_TARGET;
5363                 break;
5364         default:
5365                 break;
5366         }
5367
5368         if (ha->tgt.ini_mode_force_reverse)
5369                 qla_reverse_ini_mode(vha);
5370 }
5371
5372 /*
5373  * qla_tgt_enable_vha - NO LOCK HELD
5374  *
5375  * host_reset, bring up w/ Target Mode Enabled
5376  */
5377 void
5378 qlt_enable_vha(struct scsi_qla_host *vha)
5379 {
5380         struct qla_hw_data *ha = vha->hw;
5381         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5382         unsigned long flags;
5383         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5384
5385         if (!tgt) {
5386                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5387                     "Unable to locate qla_tgt pointer from"
5388                     " struct qla_hw_data\n");
5389                 dump_stack();
5390                 return;
5391         }
5392
5393         spin_lock_irqsave(&ha->hardware_lock, flags);
5394         tgt->tgt_stopped = 0;
5395         qlt_set_mode(vha);
5396         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5397
5398         if (vha->vp_idx) {
5399                 qla24xx_disable_vp(vha);
5400                 qla24xx_enable_vp(vha);
5401         } else {
5402                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5403                 qla2xxx_wake_dpc(base_vha);
5404                 qla2x00_wait_for_hba_online(base_vha);
5405         }
5406 }
5407 EXPORT_SYMBOL(qlt_enable_vha);
5408
5409 /*
5410  * qla_tgt_disable_vha - NO LOCK HELD
5411  *
5412  * Disable Target Mode and reset the adapter
5413  */
5414 static void qlt_disable_vha(struct scsi_qla_host *vha)
5415 {
5416         struct qla_hw_data *ha = vha->hw;
5417         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5418         unsigned long flags;
5419
5420         if (!tgt) {
5421                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5422                     "Unable to locate qla_tgt pointer from"
5423                     " struct qla_hw_data\n");
5424                 dump_stack();
5425                 return;
5426         }
5427
5428         spin_lock_irqsave(&ha->hardware_lock, flags);
5429         qlt_clear_mode(vha);
5430         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5431
5432         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5433         qla2xxx_wake_dpc(vha);
5434         qla2x00_wait_for_hba_online(vha);
5435 }
5436
5437 /*
5438  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5439  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5440  * members.
5441  */
5442 void
5443 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5444 {
5445         if (!qla_tgt_mode_enabled(vha))
5446                 return;
5447
5448         vha->vha_tgt.qla_tgt = NULL;
5449
5450         mutex_init(&vha->vha_tgt.tgt_mutex);
5451         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5452
5453         qlt_clear_mode(vha);
5454
5455         /*
5456          * NOTE: Currently the value is kept the same for <24xx and
5457          * >=24xx ISPs. If it is necessary to change it,
5458          * the check should be added for specific ISPs,
5459          * assigning the value appropriately.
5460          */
5461         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5462
5463         qlt_add_target(ha, vha);
5464 }
5465
5466 void
5467 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5468 {
5469         /*
5470          * FC-4 Feature bit 0 indicates target functionality to the name server.
5471          */
5472         if (qla_tgt_mode_enabled(vha)) {
5473                 if (qla_ini_mode_enabled(vha))
5474                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5475                 else
5476                         ct_req->req.rff_id.fc4_feature = BIT_0;
5477         } else if (qla_ini_mode_enabled(vha)) {
5478                 ct_req->req.rff_id.fc4_feature = BIT_1;
5479         }
5480 }
5481
5482 /*
5483  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5484  * @ha: HA context
5485  *
5486  * Beginning of ATIO ring has initialization control block already built
5487  * by nvram config routine.
5488  *
5489  * Returns 0 on success.
5490  */
5491 void
5492 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5493 {
5494         struct qla_hw_data *ha = vha->hw;
5495         uint16_t cnt;
5496         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5497
5498         if (!qla_tgt_mode_enabled(vha))
5499                 return;
5500
5501         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5502                 pkt->u.raw.signature = ATIO_PROCESSED;
5503                 pkt++;
5504         }
5505
5506 }
5507
5508 /*
5509  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5510  * @ha: SCSI driver HA context
5511  */
5512 void
5513 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5514 {
5515         struct qla_hw_data *ha = vha->hw;
5516         struct atio_from_isp *pkt;
5517         int cnt, i;
5518
5519         if (!vha->flags.online)
5520                 return;
5521
5522         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5523                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5524                 cnt = pkt->u.raw.entry_count;
5525
5526                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5527
5528                 for (i = 0; i < cnt; i++) {
5529                         ha->tgt.atio_ring_index++;
5530                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5531                                 ha->tgt.atio_ring_index = 0;
5532                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5533                         } else
5534                                 ha->tgt.atio_ring_ptr++;
5535
5536                         pkt->u.raw.signature = ATIO_PROCESSED;
5537                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5538                 }
5539                 wmb();
5540         }
5541
5542         /* Adjust ring index */
5543         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5544 }
5545
5546 void
5547 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5548 {
5549         struct qla_hw_data *ha = vha->hw;
5550         if (!QLA_TGT_MODE_ENABLED())
5551                 return;
5552
5553         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5554         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5555         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5556
5557         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5558                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5559                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5560
5561                 icb->msix_atio = cpu_to_le16(msix->entry);
5562                 ql_dbg(ql_dbg_init, vha, 0xf072,
5563                     "Registering ICB vector 0x%x for atio que.\n",
5564                     msix->entry);
5565         }
5566 }
5567
5568 void
5569 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5570 {
5571         struct qla_hw_data *ha = vha->hw;
5572
5573         if (qla_tgt_mode_enabled(vha)) {
5574                 if (!ha->tgt.saved_set) {
5575                         /* We save only once */
5576                         ha->tgt.saved_exchange_count = nv->exchange_count;
5577                         ha->tgt.saved_firmware_options_1 =
5578                             nv->firmware_options_1;
5579                         ha->tgt.saved_firmware_options_2 =
5580                             nv->firmware_options_2;
5581                         ha->tgt.saved_firmware_options_3 =
5582                             nv->firmware_options_3;
5583                         ha->tgt.saved_set = 1;
5584                 }
5585
5586                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5587
5588                 /* Enable target mode */
5589                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5590
5591                 /* Disable ini mode, if requested */
5592                 if (!qla_ini_mode_enabled(vha))
5593                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5594
5595                 /* Disable Full Login after LIP */
5596                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5597                 /* Enable initial LIP */
5598                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5599                 if (ql2xtgt_tape_enable)
5600                         /* Enable FC Tape support */
5601                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5602                 else
5603                         /* Disable FC Tape support */
5604                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5605
5606                 /* Disable Full Login after LIP */
5607                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5608                 /* Enable target PRLI control */
5609                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5610         } else {
5611                 if (ha->tgt.saved_set) {
5612                         nv->exchange_count = ha->tgt.saved_exchange_count;
5613                         nv->firmware_options_1 =
5614                             ha->tgt.saved_firmware_options_1;
5615                         nv->firmware_options_2 =
5616                             ha->tgt.saved_firmware_options_2;
5617                         nv->firmware_options_3 =
5618                             ha->tgt.saved_firmware_options_3;
5619                 }
5620                 return;
5621         }
5622
5623         /* out-of-order frames reassembly */
5624         nv->firmware_options_3 |= BIT_6|BIT_9;
5625
5626         if (ha->tgt.enable_class_2) {
5627                 if (vha->flags.init_done)
5628                         fc_host_supported_classes(vha->host) =
5629                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5630
5631                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5632         } else {
5633                 if (vha->flags.init_done)
5634                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5635
5636                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5637         }
5638 }
5639
5640 void
5641 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5642         struct init_cb_24xx *icb)
5643 {
5644         struct qla_hw_data *ha = vha->hw;
5645
5646         if (ha->tgt.node_name_set) {
5647                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5648                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5649         }
5650 }
5651
5652 void
5653 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5654 {
5655         struct qla_hw_data *ha = vha->hw;
5656
5657         if (!QLA_TGT_MODE_ENABLED())
5658                 return;
5659
5660         if (qla_tgt_mode_enabled(vha)) {
5661                 if (!ha->tgt.saved_set) {
5662                         /* We save only once */
5663                         ha->tgt.saved_exchange_count = nv->exchange_count;
5664                         ha->tgt.saved_firmware_options_1 =
5665                             nv->firmware_options_1;
5666                         ha->tgt.saved_firmware_options_2 =
5667                             nv->firmware_options_2;
5668                         ha->tgt.saved_firmware_options_3 =
5669                             nv->firmware_options_3;
5670                         ha->tgt.saved_set = 1;
5671                 }
5672
5673                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5674
5675                 /* Enable target mode */
5676                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5677
5678                 /* Disable ini mode, if requested */
5679                 if (!qla_ini_mode_enabled(vha))
5680                         nv->firmware_options_1 |=
5681                             __constant_cpu_to_le32(BIT_5);
5682
5683                 /* Disable Full Login after LIP */
5684                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5685                 /* Enable initial LIP */
5686                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5687                 if (ql2xtgt_tape_enable)
5688                         /* Enable FC tape support */
5689                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5690                 else
5691                         /* Disable FC tape support */
5692                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5693
5694                 /* Disable Full Login after LIP */
5695                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5696                 /* Enable target PRLI control */
5697                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5698         } else {
5699                 if (ha->tgt.saved_set) {
5700                         nv->exchange_count = ha->tgt.saved_exchange_count;
5701                         nv->firmware_options_1 =
5702                             ha->tgt.saved_firmware_options_1;
5703                         nv->firmware_options_2 =
5704                             ha->tgt.saved_firmware_options_2;
5705                         nv->firmware_options_3 =
5706                             ha->tgt.saved_firmware_options_3;
5707                 }
5708                 return;
5709         }
5710
5711         /* out-of-order frames reassembly */
5712         nv->firmware_options_3 |= BIT_6|BIT_9;
5713
5714         if (ha->tgt.enable_class_2) {
5715                 if (vha->flags.init_done)
5716                         fc_host_supported_classes(vha->host) =
5717                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5718
5719                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5720         } else {
5721                 if (vha->flags.init_done)
5722                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5723
5724                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5725         }
5726 }
5727
5728 void
5729 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5730         struct init_cb_81xx *icb)
5731 {
5732         struct qla_hw_data *ha = vha->hw;
5733
5734         if (!QLA_TGT_MODE_ENABLED())
5735                 return;
5736
5737         if (ha->tgt.node_name_set) {
5738                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5739                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5740         }
5741 }
5742
5743 void
5744 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5745 {
5746         if (!QLA_TGT_MODE_ENABLED())
5747                 return;
5748
5749         ha->msix_count += 1; /* For ATIO Q */
5750 }
5751
5752 int
5753 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5754         struct sts_entry_24xx *pkt)
5755 {
5756         switch (pkt->entry_type) {
5757         case ABTS_RECV_24XX:
5758         case ABTS_RESP_24XX:
5759         case CTIO_TYPE7:
5760         case NOTIFY_ACK_TYPE:
5761         case CTIO_CRC2:
5762                 return 1;
5763         default:
5764                 return 0;
5765         }
5766 }
5767
5768 void
5769 qlt_modify_vp_config(struct scsi_qla_host *vha,
5770         struct vp_config_entry_24xx *vpmod)
5771 {
5772         if (qla_tgt_mode_enabled(vha))
5773                 vpmod->options_idx1 &= ~BIT_5;
5774         /* Disable ini mode, if requested */
5775         if (!qla_ini_mode_enabled(vha))
5776                 vpmod->options_idx1 &= ~BIT_4;
5777 }
5778
5779 void
5780 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5781 {
5782         if (!QLA_TGT_MODE_ENABLED())
5783                 return;
5784
5785         if  (ha->mqenable || IS_QLA83XX(ha)) {
5786                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5787                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5788         } else {
5789                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5790                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5791         }
5792
5793         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5794         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5795         qlt_clear_mode(base_vha);
5796 }
5797
5798 irqreturn_t
5799 qla83xx_msix_atio_q(int irq, void *dev_id)
5800 {
5801         struct rsp_que *rsp;
5802         scsi_qla_host_t *vha;
5803         struct qla_hw_data *ha;
5804         unsigned long flags;
5805
5806         rsp = (struct rsp_que *) dev_id;
5807         ha = rsp->hw;
5808         vha = pci_get_drvdata(ha->pdev);
5809
5810         spin_lock_irqsave(&ha->hardware_lock, flags);
5811
5812         qlt_24xx_process_atio_queue(vha);
5813         qla24xx_process_response_queue(vha, rsp);
5814
5815         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5816
5817         return IRQ_HANDLED;
5818 }
5819
5820 int
5821 qlt_mem_alloc(struct qla_hw_data *ha)
5822 {
5823         if (!QLA_TGT_MODE_ENABLED())
5824                 return 0;
5825
5826         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5827             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5828         if (!ha->tgt.tgt_vp_map)
5829                 return -ENOMEM;
5830
5831         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5832             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5833             &ha->tgt.atio_dma, GFP_KERNEL);
5834         if (!ha->tgt.atio_ring) {
5835                 kfree(ha->tgt.tgt_vp_map);
5836                 return -ENOMEM;
5837         }
5838         return 0;
5839 }
5840
5841 void
5842 qlt_mem_free(struct qla_hw_data *ha)
5843 {
5844         if (!QLA_TGT_MODE_ENABLED())
5845                 return;
5846
5847         if (ha->tgt.atio_ring) {
5848                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5849                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5850                     ha->tgt.atio_dma);
5851         }
5852         kfree(ha->tgt.tgt_vp_map);
5853 }
5854
5855 /* vport_slock to be held by the caller */
5856 void
5857 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5858 {
5859         if (!QLA_TGT_MODE_ENABLED())
5860                 return;
5861
5862         switch (cmd) {
5863         case SET_VP_IDX:
5864                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5865                 break;
5866         case SET_AL_PA:
5867                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5868                 break;
5869         case RESET_VP_IDX:
5870                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5871                 break;
5872         case RESET_AL_PA:
5873                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5874                 break;
5875         }
5876 }
5877
5878 static int __init qlt_parse_ini_mode(void)
5879 {
5880         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5881                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5882         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5883                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5884         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5885                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5886         else
5887                 return false;
5888
5889         return true;
5890 }
5891
5892 int __init qlt_init(void)
5893 {
5894         int ret;
5895
5896         if (!qlt_parse_ini_mode()) {
5897                 ql_log(ql_log_fatal, NULL, 0xe06b,
5898                     "qlt_parse_ini_mode() failed\n");
5899                 return -EINVAL;
5900         }
5901
5902         if (!QLA_TGT_MODE_ENABLED())
5903                 return 0;
5904
5905         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5906             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5907             qla_tgt_mgmt_cmd), 0, NULL);
5908         if (!qla_tgt_mgmt_cmd_cachep) {
5909                 ql_log(ql_log_fatal, NULL, 0xe06d,
5910                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5911                 return -ENOMEM;
5912         }
5913
5914         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5915             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5916         if (!qla_tgt_mgmt_cmd_mempool) {
5917                 ql_log(ql_log_fatal, NULL, 0xe06e,
5918                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5919                 ret = -ENOMEM;
5920                 goto out_mgmt_cmd_cachep;
5921         }
5922
5923         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5924         if (!qla_tgt_wq) {
5925                 ql_log(ql_log_fatal, NULL, 0xe06f,
5926                     "alloc_workqueue for qla_tgt_wq failed\n");
5927                 ret = -ENOMEM;
5928                 goto out_cmd_mempool;
5929         }
5930         /*
5931          * Return 1 to signal that initiator-mode is being disabled
5932          */
5933         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5934
5935 out_cmd_mempool:
5936         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5937 out_mgmt_cmd_cachep:
5938         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5939         return ret;
5940 }
5941
5942 void qlt_exit(void)
5943 {
5944         if (!QLA_TGT_MODE_ENABLED())
5945                 return;
5946
5947         destroy_workqueue(qla_tgt_wq);
5948         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5949         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5950 }