kernel/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 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 /*
 118  * Global Variables
 119  */
 120 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 121 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 122 static struct workqueue_struct *qla_tgt_wq;
 123 static DEFINE_MUTEX(qla_tgt_mutex);
 124 static LIST_HEAD(qla_tgt_glist);
 125
 126 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 127 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 128         struct qla_tgt *tgt,
 129         const uint8_t *port_name)
 130 {
 131         struct qla_tgt_sess *sess;
 132
 133         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 134                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 135                         return sess;
 136         }
 137
 138         return NULL;
 139 }
 140
 141 /* Might release hw lock, then reaquire!! */
 142 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 143 {
 144         /* Send marker if required */
 145         if (unlikely(vha->marker_needed != 0)) {
 146                 int rc = qla2x00_issue_marker(vha, vha_locked);
 147                 if (rc != QLA_SUCCESS) {
 148                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 149                             "qla_target(%d): issue_marker() failed\n",
 150                             vha->vp_idx);
 151                 }
 152                 return rc;
 153         }
 154         return QLA_SUCCESS;
 155 }
 156
 157 static inline
 158 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 159         uint8_t *d_id)
 160 {
 161         struct qla_hw_data *ha = vha->hw;
 162         uint8_t vp_idx;
 163
 164         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 165                 return NULL;
 166
 167         if (vha->d_id.b.al_pa == d_id[2])
 168                 return vha;
 169
 170         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 171         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 172         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 173                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 174
 175         return NULL;
 176 }
 177
 178 static inline
 179 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 180         uint16_t vp_idx)
 181 {
 182         struct qla_hw_data *ha = vha->hw;
 183
 184         if (vha->vp_idx == vp_idx)
 185                 return vha;
 186
 187         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 188         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 189                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 190
 191         return NULL;
 192 }
 193
 194 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 195 {
 196         unsigned long flags;
 197
 198         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 199
 200         vha->hw->tgt.num_pend_cmds++;
 201         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 202                 vha->hw->qla_stats.stat_max_pend_cmds =
 203                         vha->hw->tgt.num_pend_cmds;
 204         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 205 }
 206 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 207 {
 208         unsigned long flags;
 209
 210         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 211         vha->hw->tgt.num_pend_cmds--;
 212         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 213 }
 214
 215 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 216         struct atio_from_isp *atio)
 217 {
 218         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 219                 "%s: qla_target(%d): type %x ox_id %04x\n",
 220                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 221                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 222
 223         switch (atio->u.raw.entry_type) {
 224         case ATIO_TYPE7:
 225         {
 226                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 227                     atio->u.isp24.fcp_hdr.d_id);
 228                 if (unlikely(NULL == host)) {
 229                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 230                             "qla_target(%d): Received ATIO_TYPE7 "
 231                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 232                             atio->u.isp24.fcp_hdr.d_id[0],
 233                             atio->u.isp24.fcp_hdr.d_id[1],
 234                             atio->u.isp24.fcp_hdr.d_id[2]);
 235                         break;
 236                 }
 237                 qlt_24xx_atio_pkt(host, atio);
 238                 break;
 239         }
 240
 241         case IMMED_NOTIFY_TYPE:
 242         {
 243                 struct scsi_qla_host *host = vha;
 244                 struct imm_ntfy_from_isp *entry =
 245                     (struct imm_ntfy_from_isp *)atio;
 246
 247                 if ((entry->u.isp24.vp_index != 0xFF) &&
 248                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 249                         host = qlt_find_host_by_vp_idx(vha,
 250                             entry->u.isp24.vp_index);
 251                         if (unlikely(!host)) {
 252                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 253                                     "qla_target(%d): Received "
 254                                     "ATIO (IMMED_NOTIFY_TYPE) "
 255                                     "with unknown vp_index %d\n",
 256                                     vha->vp_idx, entry->u.isp24.vp_index);
 257                                 break;
 258                         }
 259                 }
 260                 qlt_24xx_atio_pkt(host, atio);
 261                 break;
 262         }
 263
 264         default:
 265                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 266                     "qla_target(%d): Received unknown ATIO atio "
 267                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 268                 break;
 269         }
 270
 271         return;
 272 }
 273
 274 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 275 {
 276         switch (pkt->entry_type) {
 277         case CTIO_CRC2:
 278                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 279                         "qla_target(%d):%s: CRC2 Response pkt\n",
 280                         vha->vp_idx, __func__);
 281         case CTIO_TYPE7:
 282         {
 283                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 284                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 285                     entry->vp_index);
 286                 if (unlikely(!host)) {
 287                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 288                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 289                             "received, with unknown vp_index %d\n",
 290                             vha->vp_idx, entry->vp_index);
 291                         break;
 292                 }
 293                 qlt_response_pkt(host, pkt);
 294                 break;
 295         }
 296
 297         case IMMED_NOTIFY_TYPE:
 298         {
 299                 struct scsi_qla_host *host = vha;
 300                 struct imm_ntfy_from_isp *entry =
 301                     (struct imm_ntfy_from_isp *)pkt;
 302
 303                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 304                 if (unlikely(!host)) {
 305                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 306                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 307                             "received, with unknown vp_index %d\n",
 308                             vha->vp_idx, entry->u.isp24.vp_index);
 309                         break;
 310                 }
 311                 qlt_response_pkt(host, pkt);
 312                 break;
 313         }
 314
 315         case NOTIFY_ACK_TYPE:
 316         {
 317                 struct scsi_qla_host *host = vha;
 318                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 319
 320                 if (0xFF != entry->u.isp24.vp_index) {
 321                         host = qlt_find_host_by_vp_idx(vha,
 322                             entry->u.isp24.vp_index);
 323                         if (unlikely(!host)) {
 324                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 325                                     "qla_target(%d): Response "
 326                                     "pkt (NOTIFY_ACK_TYPE) "
 327                                     "received, with unknown "
 328                                     "vp_index %d\n", vha->vp_idx,
 329                                     entry->u.isp24.vp_index);
 330                                 break;
 331                         }
 332                 }
 333                 qlt_response_pkt(host, pkt);
 334                 break;
 335         }
 336
 337         case ABTS_RECV_24XX:
 338         {
 339                 struct abts_recv_from_24xx *entry =
 340                     (struct abts_recv_from_24xx *)pkt;
 341                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 342                     entry->vp_index);
 343                 if (unlikely(!host)) {
 344                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 345                             "qla_target(%d): Response pkt "
 346                             "(ABTS_RECV_24XX) received, with unknown "
 347                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 348                         break;
 349                 }
 350                 qlt_response_pkt(host, pkt);
 351                 break;
 352         }
 353
 354         case ABTS_RESP_24XX:
 355         {
 356                 struct abts_resp_to_24xx *entry =
 357                     (struct abts_resp_to_24xx *)pkt;
 358                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 359                     entry->vp_index);
 360                 if (unlikely(!host)) {
 361                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 362                             "qla_target(%d): Response pkt "
 363                             "(ABTS_RECV_24XX) received, with unknown "
 364                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 365                         break;
 366                 }
 367                 qlt_response_pkt(host, pkt);
 368                 break;
 369         }
 370
 371         default:
 372                 qlt_response_pkt(vha, pkt);
 373                 break;
 374         }
 375
 376 }
 377
 378 static void qlt_free_session_done(struct work_struct *work)
 379 {
 380         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 381             free_work);
 382         struct qla_tgt *tgt = sess->tgt;
 383         struct scsi_qla_host *vha = sess->vha;
 384         struct qla_hw_data *ha = vha->hw;
 385
 386         BUG_ON(!tgt);
 387         /*
 388          * Release the target session for FC Nexus from fabric module code.
 389          */
 390         if (sess->se_sess != NULL)
 391                 ha->tgt.tgt_ops->free_session(sess);
 392
 393         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 394             "Unregistration of sess %p finished\n", sess);
 395
 396         kfree(sess);
 397         /*
 398          * We need to protect against race, when tgt is freed before or
 399          * inside wake_up()
 400          */
 401         tgt->sess_count--;
 402         if (tgt->sess_count == 0)
 403                 wake_up_all(&tgt->waitQ);
 404 }
 405
 406 /* ha->hardware_lock supposed to be held on entry */
 407 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 408 {
 409         struct scsi_qla_host *vha = sess->vha;
 410
 411         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 412
 413         list_del(&sess->sess_list_entry);
 414         if (sess->deleted)
 415                 list_del(&sess->del_list_entry);
 416
 417         INIT_WORK(&sess->free_work, qlt_free_session_done);
 418         schedule_work(&sess->free_work);
 419 }
 420 EXPORT_SYMBOL(qlt_unreg_sess);
 421
 422 /* ha->hardware_lock supposed to be held on entry */
 423 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 424 {
 425         struct qla_hw_data *ha = vha->hw;
 426         struct qla_tgt_sess *sess = NULL;
 427         uint32_t unpacked_lun, lun = 0;
 428         uint16_t loop_id;
 429         int res = 0;
 430         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 431         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 432
 433         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 434         if (loop_id == 0xFFFF) {
 435                 /* Global event */
 436                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 437                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 438 #if 0 /* FIXME: do we need to choose a session here? */
 439                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 440                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 441                             typeof(*sess), sess_list_entry);
 442                         switch (mcmd) {
 443                         case QLA_TGT_NEXUS_LOSS_SESS:
 444                                 mcmd = QLA_TGT_NEXUS_LOSS;
 445                                 break;
 446                         case QLA_TGT_ABORT_ALL_SESS:
 447                                 mcmd = QLA_TGT_ABORT_ALL;
 448                                 break;
 449                         case QLA_TGT_NEXUS_LOSS:
 450                         case QLA_TGT_ABORT_ALL:
 451                                 break;
 452                         default:
 453                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 454                                     "qla_target(%d): Not allowed "
 455                                     "command %x in %s", vha->vp_idx,
 456                                     mcmd, __func__);
 457                                 sess = NULL;
 458                                 break;
 459                         }
 460                 } else
 461                         sess = NULL;
 462 #endif
 463         } else {
 464                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 465         }
 466
 467         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 468             "Using sess for qla_tgt_reset: %p\n", sess);
 469         if (!sess) {
 470                 res = -ESRCH;
 471                 return res;
 472         }
 473
 474         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 475             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 476             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 477             mcmd, loop_id);
 478
 479         lun = a->u.isp24.fcp_cmnd.lun;
 480         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 481
 482         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 483             iocb, QLA24XX_MGMT_SEND_NACK);
 484 }
 485
 486 /* ha->hardware_lock supposed to be held on entry */
 487 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 488         bool immediate)
 489 {
 490         struct qla_tgt *tgt = sess->tgt;
 491         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 492
 493         if (sess->deleted)
 494                 return;
 495
 496         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 497             "Scheduling sess %p for deletion\n", sess);
 498         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 499         sess->deleted = 1;
 500
 501         if (immediate)
 502                 dev_loss_tmo = 0;
 503
 504         sess->expires = jiffies + dev_loss_tmo * HZ;
 505
 506         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 507             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 508             "deletion in %u secs (expires: %lu) immed: %d\n",
 509             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 510             sess->expires, immediate);
 511
 512         if (immediate)
 513                 schedule_delayed_work(&tgt->sess_del_work, 0);
 514         else
 515                 schedule_delayed_work(&tgt->sess_del_work,
 516                     sess->expires - jiffies);
 517 }
 518
 519 /* ha->hardware_lock supposed to be held on entry */
 520 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 521 {
 522         struct qla_tgt_sess *sess;
 523
 524         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 525                 qlt_schedule_sess_for_deletion(sess, true);
 526
 527         /* At this point tgt could be already dead */
 528 }
 529
 530 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 531         uint16_t *loop_id)
 532 {
 533         struct qla_hw_data *ha = vha->hw;
 534         dma_addr_t gid_list_dma;
 535         struct gid_list_info *gid_list;
 536         char *id_iter;
 537         int res, rc, i;
 538         uint16_t entries;
 539
 540         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 541             &gid_list_dma, GFP_KERNEL);
 542         if (!gid_list) {
 543                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 544                     "qla_target(%d): DMA Alloc failed of %u\n",
 545                     vha->vp_idx, qla2x00_gid_list_size(ha));
 546                 return -ENOMEM;
 547         }
 548
 549         /* Get list of logged in devices */
 550         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 551         if (rc != QLA_SUCCESS) {
 552                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 553                     "qla_target(%d): get_id_list() failed: %x\n",
 554                     vha->vp_idx, rc);
 555                 res = -1;
 556                 goto out_free_id_list;
 557         }
 558
 559         id_iter = (char *)gid_list;
 560         res = -1;
 561         for (i = 0; i < entries; i++) {
 562                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 563                 if ((gid->al_pa == s_id[2]) &&
 564                     (gid->area == s_id[1]) &&
 565                     (gid->domain == s_id[0])) {
 566                         *loop_id = le16_to_cpu(gid->loop_id);
 567                         res = 0;
 568                         break;
 569                 }
 570                 id_iter += ha->gid_list_info_size;
 571         }
 572
 573 out_free_id_list:
 574         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 575             gid_list, gid_list_dma);
 576         return res;
 577 }
 578
 579 /* ha->hardware_lock supposed to be held on entry */
 580 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 581 {
 582         BUG_ON(!sess->deleted);
 583
 584         list_del(&sess->del_list_entry);
 585         sess->deleted = 0;
 586 }
 587
 588 static void qlt_del_sess_work_fn(struct delayed_work *work)
 589 {
 590         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 591             sess_del_work);
 592         struct scsi_qla_host *vha = tgt->vha;
 593         struct qla_hw_data *ha = vha->hw;
 594         struct qla_tgt_sess *sess;
 595         unsigned long flags, elapsed;
 596
 597         spin_lock_irqsave(&ha->hardware_lock, flags);
 598         while (!list_empty(&tgt->del_sess_list)) {
 599                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 600                     del_list_entry);
 601                 elapsed = jiffies;
 602                 if (time_after_eq(elapsed, sess->expires)) {
 603                         qlt_undelete_sess(sess);
 604
 605                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 606                             "Timeout: sess %p about to be deleted\n",
 607                             sess);
 608                         ha->tgt.tgt_ops->shutdown_sess(sess);
 609                         ha->tgt.tgt_ops->put_sess(sess);
 610                 } else {
 611                         schedule_delayed_work(&tgt->sess_del_work,
 612                             sess->expires - elapsed);
 613                         break;
 614                 }
 615         }
 616         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 617 }
 618
 619 /*
 620  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 621  * Caller must put it.
 622  */
 623 static struct qla_tgt_sess *qlt_create_sess(
 624         struct scsi_qla_host *vha,
 625         fc_port_t *fcport,
 626         bool local)
 627 {
 628         struct qla_hw_data *ha = vha->hw;
 629         struct qla_tgt_sess *sess;
 630         unsigned long flags;
 631         unsigned char be_sid[3];
 632
 633         /* Check to avoid double sessions */
 634         spin_lock_irqsave(&ha->hardware_lock, flags);
 635         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 636                                 sess_list_entry) {
 637                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 638                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 639                             "Double sess %p found (s_id %x:%x:%x, "
 640                             "loop_id %d), updating to d_id %x:%x:%x, "
 641                             "loop_id %d", sess, sess->s_id.b.domain,
 642                             sess->s_id.b.al_pa, sess->s_id.b.area,
 643                             sess->loop_id, fcport->d_id.b.domain,
 644                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 645                             fcport->loop_id);
 646
 647                         if (sess->deleted)
 648                                 qlt_undelete_sess(sess);
 649
 650                         kref_get(&sess->se_sess->sess_kref);
 651                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 652                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 653
 654                         if (sess->local && !local)
 655                                 sess->local = 0;
 656                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 657
 658                         return sess;
 659                 }
 660         }
 661         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 662
 663         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 664         if (!sess) {
 665                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 666                     "qla_target(%u): session allocation failed, all commands "
 667                     "from port %8phC will be refused", vha->vp_idx,
 668                     fcport->port_name);
 669
 670                 return NULL;
 671         }
 672         sess->tgt = vha->vha_tgt.qla_tgt;
 673         sess->vha = vha;
 674         sess->s_id = fcport->d_id;
 675         sess->loop_id = fcport->loop_id;
 676         sess->local = local;
 677
 678         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 679             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 680             sess, vha->vha_tgt.qla_tgt);
 681
 682         be_sid[0] = sess->s_id.b.domain;
 683         be_sid[1] = sess->s_id.b.area;
 684         be_sid[2] = sess->s_id.b.al_pa;
 685         /*
 686          * Determine if this fc_port->port_name is allowed to access
 687          * target mode using explict NodeACLs+MappedLUNs, or using
 688          * TPG demo mode.  If this is successful a target mode FC nexus
 689          * is created.
 690          */
 691         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 692             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 693                 kfree(sess);
 694                 return NULL;
 695         }
 696         /*
 697          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 698          * access across ->hardware_lock reaquire.
 699          */
 700         kref_get(&sess->se_sess->sess_kref);
 701
 702         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 703         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 704         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 705
 706         spin_lock_irqsave(&ha->hardware_lock, flags);
 707         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 708         vha->vha_tgt.qla_tgt->sess_count++;
 709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710
 711         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 712             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 713             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 714             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 715             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 716             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 717
 718         return sess;
 719 }
 720
 721 /*
 722  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 723  */
 724 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 725 {
 726         struct qla_hw_data *ha = vha->hw;
 727         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 728         struct qla_tgt_sess *sess;
 729         unsigned long flags;
 730
 731         if (!vha->hw->tgt.tgt_ops)
 732                 return;
 733
 734         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 735                 return;
 736
 737         if (qla_ini_mode_enabled(vha))
 738                 return;
 739
 740         spin_lock_irqsave(&ha->hardware_lock, flags);
 741         if (tgt->tgt_stop) {
 742                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 743                 return;
 744         }
 745         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 746         if (!sess) {
 747                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 748
 749                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 750                 sess = qlt_create_sess(vha, fcport, false);
 751                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 752
 753                 spin_lock_irqsave(&ha->hardware_lock, flags);
 754         } else {
 755                 kref_get(&sess->se_sess->sess_kref);
 756
 757                 if (sess->deleted) {
 758                         qlt_undelete_sess(sess);
 759
 760                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 761                             "qla_target(%u): %ssession for port %8phC "
 762                             "(loop ID %d) reappeared\n", vha->vp_idx,
 763                             sess->local ? "local " : "", sess->port_name,
 764                             sess->loop_id);
 765
 766                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 767                             "Reappeared sess %p\n", sess);
 768                 }
 769                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 770                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 771         }
 772
 773         if (sess && sess->local) {
 774                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 775                     "qla_target(%u): local session for "
 776                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 777                     fcport->port_name, sess->loop_id);
 778                 sess->local = 0;
 779         }
 780         ha->tgt.tgt_ops->put_sess(sess);
 781         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 782 }
 783
 784 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 785 {
 786         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 787         struct qla_tgt_sess *sess;
 788
 789         if (!vha->hw->tgt.tgt_ops)
 790                 return;
 791
 792         if (!tgt)
 793                 return;
 794
 795         if (tgt->tgt_stop) {
 796                 return;
 797         }
 798         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 799         if (!sess) {
 800                 return;
 801         }
 802
 803         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 804
 805         sess->local = 1;
 806         qlt_schedule_sess_for_deletion(sess, false);
 807 }
 808
 809 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 810 {
 811         struct qla_hw_data *ha = tgt->ha;
 812         unsigned long flags;
 813         int res;
 814         /*
 815          * We need to protect against race, when tgt is freed before or
 816          * inside wake_up()
 817          */
 818         spin_lock_irqsave(&ha->hardware_lock, flags);
 819         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 820             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 821             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 822         res = (tgt->sess_count == 0);
 823         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 824
 825         return res;
 826 }
 827
 828 /* Called by tcm_qla2xxx configfs code */
 829 int qlt_stop_phase1(struct qla_tgt *tgt)
 830 {
 831         struct scsi_qla_host *vha = tgt->vha;
 832         struct qla_hw_data *ha = tgt->ha;
 833         unsigned long flags;
 834
 835         mutex_lock(&qla_tgt_mutex);
 836         if (!vha->fc_vport) {
 837                 struct Scsi_Host *sh = vha->host;
 838                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 839                 bool npiv_vports;
 840
 841                 spin_lock_irqsave(sh->host_lock, flags);
 842                 npiv_vports = (fc_host->npiv_vports_inuse);
 843                 spin_unlock_irqrestore(sh->host_lock, flags);
 844
 845                 if (npiv_vports) {
 846                         mutex_unlock(&qla_tgt_mutex);
 847                         return -EPERM;
 848                 }
 849         }
 850         if (tgt->tgt_stop || tgt->tgt_stopped) {
 851                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 852                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 853                 mutex_unlock(&qla_tgt_mutex);
 854                 return -EPERM;
 855         }
 856
 857         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 858             vha->host_no, vha);
 859         /*
 860          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 861          * Lock is needed, because we still can get an incoming packet.
 862          */
 863         mutex_lock(&vha->vha_tgt.tgt_mutex);
 864         spin_lock_irqsave(&ha->hardware_lock, flags);
 865         tgt->tgt_stop = 1;
 866         qlt_clear_tgt_db(tgt);
 867         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 868         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 869         mutex_unlock(&qla_tgt_mutex);
 870
 871         flush_delayed_work(&tgt->sess_del_work);
 872
 873         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 874             "Waiting for sess works (tgt %p)", tgt);
 875         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 876         while (!list_empty(&tgt->sess_works_list)) {
 877                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 878                 flush_scheduled_work();
 879                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 880         }
 881         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 882
 883         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 884             "Waiting for tgt %p: list_empty(sess_list)=%d "
 885             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 886             tgt->sess_count);
 887
 888         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 889
 890         /* Big hammer */
 891         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 892                 qlt_disable_vha(vha);
 893
 894         /* Wait for sessions to clear out (just in case) */
 895         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 896         return 0;
 897 }
 898 EXPORT_SYMBOL(qlt_stop_phase1);
 899
 900 /* Called by tcm_qla2xxx configfs code */
 901 void qlt_stop_phase2(struct qla_tgt *tgt)
 902 {
 903         struct qla_hw_data *ha = tgt->ha;
 904         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 905         unsigned long flags;
 906
 907         if (tgt->tgt_stopped) {
 908                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 909                     "Already in tgt->tgt_stopped state\n");
 910                 dump_stack();
 911                 return;
 912         }
 913
 914         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 915             "Waiting for %d IRQ commands to complete (tgt %p)",
 916             tgt->irq_cmd_count, tgt);
 917
 918         mutex_lock(&vha->vha_tgt.tgt_mutex);
 919         spin_lock_irqsave(&ha->hardware_lock, flags);
 920         while (tgt->irq_cmd_count != 0) {
 921                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 922                 udelay(2);
 923                 spin_lock_irqsave(&ha->hardware_lock, flags);
 924         }
 925         tgt->tgt_stop = 0;
 926         tgt->tgt_stopped = 1;
 927         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 928         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 929
 930         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 931             tgt);
 932 }
 933 EXPORT_SYMBOL(qlt_stop_phase2);
 934
 935 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 936 static void qlt_release(struct qla_tgt *tgt)
 937 {
 938         scsi_qla_host_t *vha = tgt->vha;
 939
 940         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 941                 qlt_stop_phase2(tgt);
 942
 943         vha->vha_tgt.qla_tgt = NULL;
 944
 945         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 946             "Release of tgt %p finished\n", tgt);
 947
 948         kfree(tgt);
 949 }
 950
 951 /* ha->hardware_lock supposed to be held on entry */
 952 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 953         const void *param, unsigned int param_size)
 954 {
 955         struct qla_tgt_sess_work_param *prm;
 956         unsigned long flags;
 957
 958         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 959         if (!prm) {
 960                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 961                     "qla_target(%d): Unable to create session "
 962                     "work, command will be refused", 0);
 963                 return -ENOMEM;
 964         }
 965
 966         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 967             "Scheduling work (type %d, prm %p)"
 968             " to find session for param %p (size %d, tgt %p)\n",
 969             type, prm, param, param_size, tgt);
 970
 971         prm->type = type;
 972         memcpy(&prm->tm_iocb, param, param_size);
 973
 974         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 975         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 976         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 977
 978         schedule_work(&tgt->sess_work);
 979
 980         return 0;
 981 }
 982
 983 /*
 984  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 985  */
 986 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 987         struct imm_ntfy_from_isp *ntfy,
 988         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 989         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 990 {
 991         struct qla_hw_data *ha = vha->hw;
 992         request_t *pkt;
 993         struct nack_to_isp *nack;
 994
 995         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 996
 997         /* Send marker if required */
 998         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 999                 return;
1000
1001         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1002         if (!pkt) {
1003                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1004                     "qla_target(%d): %s failed: unable to allocate "
1005                     "request packet\n", vha->vp_idx, __func__);
1006                 return;
1007         }
1008
1009         if (vha->vha_tgt.qla_tgt != NULL)
1010                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1011
1012         pkt->entry_type = NOTIFY_ACK_TYPE;
1013         pkt->entry_count = 1;
1014
1015         nack = (struct nack_to_isp *)pkt;
1016         nack->ox_id = ntfy->ox_id;
1017
1018         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1019         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1020                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1021                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1022         }
1023         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1024         nack->u.isp24.status = ntfy->u.isp24.status;
1025         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1026         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1027         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1028         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1029         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1030         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1031         nack->u.isp24.srr_reject_code = srr_reject_code;
1032         nack->u.isp24.srr_reject_code_expl = srr_explan;
1033         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1034
1035         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1036             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1037             vha->vp_idx, nack->u.isp24.status);
1038
1039         /* Memory Barrier */
1040         wmb();
1041         qla2x00_start_iocbs(vha, vha->req);
1042 }
1043
1044 /*
1045  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1046  */
1047 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1048         struct abts_recv_from_24xx *abts, uint32_t status,
1049         bool ids_reversed)
1050 {
1051         struct qla_hw_data *ha = vha->hw;
1052         struct abts_resp_to_24xx *resp;
1053         uint32_t f_ctl;
1054         uint8_t *p;
1055
1056         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1057             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1058             ha, abts, status);
1059
1060         /* Send marker if required */
1061         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1062                 return;
1063
1064         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1065         if (!resp) {
1066                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1067                     "qla_target(%d): %s failed: unable to allocate "
1068                     "request packet", vha->vp_idx, __func__);
1069                 return;
1070         }
1071
1072         resp->entry_type = ABTS_RESP_24XX;
1073         resp->entry_count = 1;
1074         resp->nport_handle = abts->nport_handle;
1075         resp->vp_index = vha->vp_idx;
1076         resp->sof_type = abts->sof_type;
1077         resp->exchange_address = abts->exchange_address;
1078         resp->fcp_hdr_le = abts->fcp_hdr_le;
1079         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1080             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1081             F_CTL_SEQ_INITIATIVE);
1082         p = (uint8_t *)&f_ctl;
1083         resp->fcp_hdr_le.f_ctl[0] = *p++;
1084         resp->fcp_hdr_le.f_ctl[1] = *p++;
1085         resp->fcp_hdr_le.f_ctl[2] = *p;
1086         if (ids_reversed) {
1087                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1088                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1089                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1090                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1091                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1092                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1093         } else {
1094                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1095                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1096                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1097                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1098                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1099                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1100         }
1101         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1102         if (status == FCP_TMF_CMPL) {
1103                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1104                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1105                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1106                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1107                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1108                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1109         } else {
1110                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1111                 resp->payload.ba_rjt.reason_code =
1112                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1113                 /* Other bytes are zero */
1114         }
1115
1116         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1117
1118         /* Memory Barrier */
1119         wmb();
1120         qla2x00_start_iocbs(vha, vha->req);
1121 }
1122
1123 /*
1124  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1125  */
1126 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1127         struct abts_resp_from_24xx_fw *entry)
1128 {
1129         struct ctio7_to_24xx *ctio;
1130
1131         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1132             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1133         /* Send marker if required */
1134         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1135                 return;
1136
1137         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1138         if (ctio == NULL) {
1139                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1140                     "qla_target(%d): %s failed: unable to allocate "
1141                     "request packet\n", vha->vp_idx, __func__);
1142                 return;
1143         }
1144
1145         /*
1146          * We've got on entrance firmware's response on by us generated
1147          * ABTS response. So, in it ID fields are reversed.
1148          */
1149
1150         ctio->entry_type = CTIO_TYPE7;
1151         ctio->entry_count = 1;
1152         ctio->nport_handle = entry->nport_handle;
1153         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1154         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1155         ctio->vp_index = vha->vp_idx;
1156         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1157         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1158         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1159         ctio->exchange_addr = entry->exchange_addr_to_abort;
1160         ctio->u.status1.flags =
1161             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1162                 CTIO7_FLAGS_TERMINATE);
1163         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1164
1165         /* Memory Barrier */
1166         wmb();
1167         qla2x00_start_iocbs(vha, vha->req);
1168
1169         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1170             FCP_TMF_CMPL, true);
1171 }
1172
1173 /* ha->hardware_lock supposed to be held on entry */
1174 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1175         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1176 {
1177         struct qla_hw_data *ha = vha->hw;
1178         struct se_session *se_sess = sess->se_sess;
1179         struct qla_tgt_mgmt_cmd *mcmd;
1180         struct se_cmd *se_cmd;
1181         u32 lun = 0;
1182         int rc;
1183         bool found_lun = false;
1184
1185         spin_lock(&se_sess->sess_cmd_lock);
1186         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1187                 struct qla_tgt_cmd *cmd =
1188                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1189                 if (cmd->tag == abts->exchange_addr_to_abort) {
1190                         lun = cmd->unpacked_lun;
1191                         found_lun = true;
1192                         break;
1193                 }
1194         }
1195         spin_unlock(&se_sess->sess_cmd_lock);
1196
1197         if (!found_lun)
1198                 return -ENOENT;
1199
1200         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1201             "qla_target(%d): task abort (tag=%d)\n",
1202             vha->vp_idx, abts->exchange_addr_to_abort);
1203
1204         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1205         if (mcmd == NULL) {
1206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1207                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1208                     vha->vp_idx, __func__);
1209                 return -ENOMEM;
1210         }
1211         memset(mcmd, 0, sizeof(*mcmd));
1212
1213         mcmd->sess = sess;
1214         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1215         mcmd->reset_count = vha->hw->chip_reset;
1216
1217         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1218             abts->exchange_addr_to_abort);
1219         if (rc != 0) {
1220                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1221                     "qla_target(%d):  tgt_ops->handle_tmr()"
1222                     " failed: %d", vha->vp_idx, rc);
1223                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1224                 return -EFAULT;
1225         }
1226
1227         return 0;
1228 }
1229
1230 /*
1231  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1232  */
1233 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1234         struct abts_recv_from_24xx *abts)
1235 {
1236         struct qla_hw_data *ha = vha->hw;
1237         struct qla_tgt_sess *sess;
1238         uint32_t tag = abts->exchange_addr_to_abort;
1239         uint8_t s_id[3];
1240         int rc;
1241
1242         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1243                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1244                     "qla_target(%d): ABTS: Abort Sequence not "
1245                     "supported\n", vha->vp_idx);
1246                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1247                 return;
1248         }
1249
1250         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1252                     "qla_target(%d): ABTS: Unknown Exchange "
1253                     "Address received\n", vha->vp_idx);
1254                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1255                 return;
1256         }
1257
1258         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1259             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1260             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1261             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1262             le32_to_cpu(abts->fcp_hdr_le.parameter));
1263
1264         s_id[0] = abts->fcp_hdr_le.s_id[2];
1265         s_id[1] = abts->fcp_hdr_le.s_id[1];
1266         s_id[2] = abts->fcp_hdr_le.s_id[0];
1267
1268         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1269         if (!sess) {
1270                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1271                     "qla_target(%d): task abort for non-existant session\n",
1272                     vha->vp_idx);
1273                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1274                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1275                 if (rc != 0) {
1276                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1277                             false);
1278                 }
1279                 return;
1280         }
1281
1282         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1283         if (rc != 0) {
1284                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1285                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1286                     vha->vp_idx, rc);
1287                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1288                 return;
1289         }
1290 }
1291
1292 /*
1293  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1294  */
1295 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1296         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1297 {
1298         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1299         struct ctio7_to_24xx *ctio;
1300         uint16_t temp;
1301
1302         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1303             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1304             ha, atio, resp_code);
1305
1306         /* Send marker if required */
1307         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1308                 return;
1309
1310         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1311         if (ctio == NULL) {
1312                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1313                     "qla_target(%d): %s failed: unable to allocate "
1314                     "request packet\n", ha->vp_idx, __func__);
1315                 return;
1316         }
1317
1318         ctio->entry_type = CTIO_TYPE7;
1319         ctio->entry_count = 1;
1320         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1321         ctio->nport_handle = mcmd->sess->loop_id;
1322         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1323         ctio->vp_index = ha->vp_idx;
1324         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1325         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1326         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1327         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1328         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1329             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1330                 CTIO7_FLAGS_SEND_STATUS);
1331         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1332         ctio->u.status1.ox_id = cpu_to_le16(temp);
1333         ctio->u.status1.scsi_status =
1334             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1335         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1336         ctio->u.status1.sense_data[0] = resp_code;
1337
1338         /* Memory Barrier */
1339         wmb();
1340         qla2x00_start_iocbs(ha, ha->req);
1341 }
1342
1343 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1344 {
1345         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1346 }
1347 EXPORT_SYMBOL(qlt_free_mcmd);
1348
1349 /* callback from target fabric module code */
1350 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1351 {
1352         struct scsi_qla_host *vha = mcmd->sess->vha;
1353         struct qla_hw_data *ha = vha->hw;
1354         unsigned long flags;
1355
1356         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1357             "TM response mcmd (%p) status %#x state %#x",
1358             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1359
1360         spin_lock_irqsave(&ha->hardware_lock, flags);
1361
1362         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1363                 /*
1364                  * Either a chip reset is active or this request was from
1365                  * previous life, just abort the processing.
1366                  */
1367                 ql_dbg(ql_dbg_async, vha, 0xe100,
1368                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1369                         qla2x00_reset_active(vha), mcmd->reset_count,
1370                         ha->chip_reset);
1371                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1372                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1373                 return;
1374         }
1375
1376         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1377                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1378                     0, 0, 0, 0, 0, 0);
1379         else {
1380                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1381                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1382                             mcmd->fc_tm_rsp, false);
1383                 else
1384                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1385                             mcmd->fc_tm_rsp);
1386         }
1387         /*
1388          * Make the callback for ->free_mcmd() to queue_work() and invoke
1389          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1390          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1391          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1392          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1393          * qlt_xmit_tm_rsp() returns here..
1394          */
1395         ha->tgt.tgt_ops->free_mcmd(mcmd);
1396         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1397 }
1398 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1399
1400 /* No locks */
1401 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1402 {
1403         struct qla_tgt_cmd *cmd = prm->cmd;
1404
1405         BUG_ON(cmd->sg_cnt == 0);
1406
1407         prm->sg = (struct scatterlist *)cmd->sg;
1408         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1409             cmd->sg_cnt, cmd->dma_data_direction);
1410         if (unlikely(prm->seg_cnt == 0))
1411                 goto out_err;
1412
1413         prm->cmd->sg_mapped = 1;
1414
1415         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1416                 /*
1417                  * If greater than four sg entries then we need to allocate
1418                  * the continuation entries
1419                  */
1420                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1421                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1422                         prm->tgt->datasegs_per_cmd,
1423                         prm->tgt->datasegs_per_cont);
1424         } else {
1425                 /* DIF */
1426                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1427                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1428                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1429                         prm->tot_dsds = prm->seg_cnt;
1430                 } else
1431                         prm->tot_dsds = prm->seg_cnt;
1432
1433                 if (cmd->prot_sg_cnt) {
1434                         prm->prot_sg      = cmd->prot_sg;
1435                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1436                                 cmd->prot_sg, cmd->prot_sg_cnt,
1437                                 cmd->dma_data_direction);
1438                         if (unlikely(prm->prot_seg_cnt == 0))
1439                                 goto out_err;
1440
1441                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1442                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1443                                 /* Dif Bundling not support here */
1444                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1445                                                                 cmd->blk_sz);
1446                                 prm->tot_dsds += prm->prot_seg_cnt;
1447                         } else
1448                                 prm->tot_dsds += prm->prot_seg_cnt;
1449                 }
1450         }
1451
1452         return 0;
1453
1454 out_err:
1455         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1456             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1457             0, prm->cmd->sg_cnt);
1458         return -1;
1459 }
1460
1461 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1462 {
1463         struct qla_hw_data *ha = vha->hw;
1464
1465         if (!cmd->sg_mapped)
1466                 return;
1467
1468         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1469         cmd->sg_mapped = 0;
1470
1471         if (cmd->prot_sg_cnt)
1472                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1473                         cmd->dma_data_direction);
1474
1475         if (cmd->ctx_dsd_alloced)
1476                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1477
1478         if (cmd->ctx)
1479                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1480 }
1481
1482 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1483         uint32_t req_cnt)
1484 {
1485         uint32_t cnt, cnt_in;
1486
1487         if (vha->req->cnt < (req_cnt + 2)) {
1488                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1489                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1490
1491                 if  (vha->req->ring_index < cnt)
1492                         vha->req->cnt = cnt - vha->req->ring_index;
1493                 else
1494                         vha->req->cnt = vha->req->length -
1495                             (vha->req->ring_index - cnt);
1496         }
1497
1498         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1499                 ql_dbg(ql_dbg_io, vha, 0x305a,
1500                     "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",
1501                     vha->vp_idx, vha->req->ring_index,
1502                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1503                 return -EAGAIN;
1504         }
1505         vha->req->cnt -= req_cnt;
1506
1507         return 0;
1508 }
1509
1510 /*
1511  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1512  */
1513 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1514 {
1515         /* Adjust ring index. */
1516         vha->req->ring_index++;
1517         if (vha->req->ring_index == vha->req->length) {
1518                 vha->req->ring_index = 0;
1519                 vha->req->ring_ptr = vha->req->ring;
1520         } else {
1521                 vha->req->ring_ptr++;
1522         }
1523         return (cont_entry_t *)vha->req->ring_ptr;
1524 }
1525
1526 /* ha->hardware_lock supposed to be held on entry */
1527 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1528 {
1529         struct qla_hw_data *ha = vha->hw;
1530         uint32_t h;
1531
1532         h = ha->tgt.current_handle;
1533         /* always increment cmd handle */
1534         do {
1535                 ++h;
1536                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1537                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1538                 if (h == ha->tgt.current_handle) {
1539                         ql_dbg(ql_dbg_io, vha, 0x305b,
1540                             "qla_target(%d): Ran out of "
1541                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1542                         h = QLA_TGT_NULL_HANDLE;
1543                         break;
1544                 }
1545         } while ((h == QLA_TGT_NULL_HANDLE) ||
1546             (h == QLA_TGT_SKIP_HANDLE) ||
1547             (ha->tgt.cmds[h-1] != NULL));
1548
1549         if (h != QLA_TGT_NULL_HANDLE)
1550                 ha->tgt.current_handle = h;
1551
1552         return h;
1553 }
1554
1555 /* ha->hardware_lock supposed to be held on entry */
1556 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1557         struct scsi_qla_host *vha)
1558 {
1559         uint32_t h;
1560         struct ctio7_to_24xx *pkt;
1561         struct qla_hw_data *ha = vha->hw;
1562         struct atio_from_isp *atio = &prm->cmd->atio;
1563         uint16_t temp;
1564
1565         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1566         prm->pkt = pkt;
1567         memset(pkt, 0, sizeof(*pkt));
1568
1569         pkt->entry_type = CTIO_TYPE7;
1570         pkt->entry_count = (uint8_t)prm->req_cnt;
1571         pkt->vp_index = vha->vp_idx;
1572
1573         h = qlt_make_handle(vha);
1574         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1575                 /*
1576                  * CTIO type 7 from the firmware doesn't provide a way to
1577                  * know the initiator's LOOP ID, hence we can't find
1578                  * the session and, so, the command.
1579                  */
1580                 return -EAGAIN;
1581         } else
1582                 ha->tgt.cmds[h-1] = prm->cmd;
1583
1584         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1585         pkt->nport_handle = prm->cmd->loop_id;
1586         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1587         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1588         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1589         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1590         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1591         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1592         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1593         pkt->u.status0.ox_id = cpu_to_le16(temp);
1594         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1595
1596         return 0;
1597 }
1598
1599 /*
1600  * ha->hardware_lock supposed to be held on entry. We have already made sure
1601  * that there is sufficient amount of request entries to not drop it.
1602  */
1603 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1604         struct scsi_qla_host *vha)
1605 {
1606         int cnt;
1607         uint32_t *dword_ptr;
1608         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1609
1610         /* Build continuation packets */
1611         while (prm->seg_cnt > 0) {
1612                 cont_a64_entry_t *cont_pkt64 =
1613                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1614
1615                 /*
1616                  * Make sure that from cont_pkt64 none of
1617                  * 64-bit specific fields used for 32-bit
1618                  * addressing. Cast to (cont_entry_t *) for
1619                  * that.
1620                  */
1621
1622                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1623
1624                 cont_pkt64->entry_count = 1;
1625                 cont_pkt64->sys_define = 0;
1626
1627                 if (enable_64bit_addressing) {
1628                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1629                         dword_ptr =
1630                             (uint32_t *)&cont_pkt64->dseg_0_address;
1631                 } else {
1632                         cont_pkt64->entry_type = CONTINUE_TYPE;
1633                         dword_ptr =
1634                             (uint32_t *)&((cont_entry_t *)
1635                                 cont_pkt64)->dseg_0_address;
1636                 }
1637
1638                 /* Load continuation entry data segments */
1639                 for (cnt = 0;
1640                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1641                     cnt++, prm->seg_cnt--) {
1642                         *dword_ptr++ =
1643                             cpu_to_le32(pci_dma_lo32
1644                                 (sg_dma_address(prm->sg)));
1645                         if (enable_64bit_addressing) {
1646                                 *dword_ptr++ =
1647                                     cpu_to_le32(pci_dma_hi32
1648                                         (sg_dma_address
1649                                         (prm->sg)));
1650                         }
1651                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1652
1653                         prm->sg = sg_next(prm->sg);
1654                 }
1655         }
1656 }
1657
1658 /*
1659  * ha->hardware_lock supposed to be held on entry. We have already made sure
1660  * that there is sufficient amount of request entries to not drop it.
1661  */
1662 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1663         struct scsi_qla_host *vha)
1664 {
1665         int cnt;
1666         uint32_t *dword_ptr;
1667         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1668         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1669
1670         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1671
1672         /* Setup packet address segment pointer */
1673         dword_ptr = pkt24->u.status0.dseg_0_address;
1674
1675         /* Set total data segment count */
1676         if (prm->seg_cnt)
1677                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1678
1679         if (prm->seg_cnt == 0) {
1680                 /* No data transfer */
1681                 *dword_ptr++ = 0;
1682                 *dword_ptr = 0;
1683                 return;
1684         }
1685
1686         /* If scatter gather */
1687
1688         /* Load command entry data segments */
1689         for (cnt = 0;
1690             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1691             cnt++, prm->seg_cnt--) {
1692                 *dword_ptr++ =
1693                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1694                 if (enable_64bit_addressing) {
1695                         *dword_ptr++ =
1696                             cpu_to_le32(pci_dma_hi32(
1697                                 sg_dma_address(prm->sg)));
1698                 }
1699                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1700
1701                 prm->sg = sg_next(prm->sg);
1702         }
1703
1704         qlt_load_cont_data_segments(prm, vha);
1705 }
1706
1707 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1708 {
1709         return cmd->bufflen > 0;
1710 }
1711
1712 /*
1713  * Called without ha->hardware_lock held
1714  */
1715 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1716         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1717         uint32_t *full_req_cnt)
1718 {
1719         struct qla_tgt *tgt = cmd->tgt;
1720         struct scsi_qla_host *vha = tgt->vha;
1721         struct qla_hw_data *ha = vha->hw;
1722         struct se_cmd *se_cmd = &cmd->se_cmd;
1723
1724         if (unlikely(cmd->aborted)) {
1725                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1726                     "qla_target(%d): terminating exchange "
1727                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1728                     se_cmd, cmd->tag);
1729
1730                 cmd->state = QLA_TGT_STATE_ABORTED;
1731                 cmd->cmd_flags |= BIT_6;
1732
1733                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1734
1735                 /* !! At this point cmd could be already freed !! */
1736                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1737         }
1738
1739         prm->cmd = cmd;
1740         prm->tgt = tgt;
1741         prm->rq_result = scsi_status;
1742         prm->sense_buffer = &cmd->sense_buffer[0];
1743         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1744         prm->sg = NULL;
1745         prm->seg_cnt = -1;
1746         prm->req_cnt = 1;
1747         prm->add_status_pkt = 0;
1748
1749         /* Send marker if required */
1750         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1751                 return -EFAULT;
1752
1753         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1754                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1755                         return -EAGAIN;
1756         }
1757
1758         *full_req_cnt = prm->req_cnt;
1759
1760         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1761                 prm->residual = se_cmd->residual_count;
1762                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1763                     "Residual underflow: %d (tag %d, "
1764                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1765                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1766                     cmd->bufflen, prm->rq_result);
1767                 prm->rq_result |= SS_RESIDUAL_UNDER;
1768         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1769                 prm->residual = se_cmd->residual_count;
1770                 ql_dbg(ql_dbg_io, vha, 0x305d,
1771                     "Residual overflow: %d (tag %d, "
1772                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1773                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1774                     cmd->bufflen, prm->rq_result);
1775                 prm->rq_result |= SS_RESIDUAL_OVER;
1776         }
1777
1778         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1779                 /*
1780                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1781                  * ignored in *xmit_response() below
1782                  */
1783                 if (qlt_has_data(cmd)) {
1784                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1785                             (IS_FWI2_CAPABLE(ha) &&
1786                             (prm->rq_result != 0))) {
1787                                 prm->add_status_pkt = 1;
1788                                 (*full_req_cnt)++;
1789                         }
1790                 }
1791         }
1792
1793         return 0;
1794 }
1795
1796 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1797         struct qla_tgt_cmd *cmd, int sending_sense)
1798 {
1799         if (ha->tgt.enable_class_2)
1800                 return 0;
1801
1802         if (sending_sense)
1803                 return cmd->conf_compl_supported;
1804         else
1805                 return ha->tgt.enable_explicit_conf &&
1806                     cmd->conf_compl_supported;
1807 }
1808
1809 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1810 /*
1811  *  Original taken from the XFS code
1812  */
1813 static unsigned long qlt_srr_random(void)
1814 {
1815         static int Inited;
1816         static unsigned long RandomValue;
1817         static DEFINE_SPINLOCK(lock);
1818         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1819         register long rv;
1820         register long lo;
1821         register long hi;
1822         unsigned long flags;
1823
1824         spin_lock_irqsave(&lock, flags);
1825         if (!Inited) {
1826                 RandomValue = jiffies;
1827                 Inited = 1;
1828         }
1829         rv = RandomValue;
1830         hi = rv / 127773;
1831         lo = rv % 127773;
1832         rv = 16807 * lo - 2836 * hi;
1833         if (rv <= 0)
1834                 rv += 2147483647;
1835         RandomValue = rv;
1836         spin_unlock_irqrestore(&lock, flags);
1837         return rv;
1838 }
1839
1840 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1841 {
1842 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1843         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1844             == 50) {
1845                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1846                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1847                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1848         }
1849 #endif
1850         /*
1851          * It's currently not possible to simulate SRRs for FCP_WRITE without
1852          * a physical link layer failure, so don't even try here..
1853          */
1854         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1855                 return;
1856
1857         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1858             ((qlt_srr_random() % 100) == 20)) {
1859                 int i, leave = 0;
1860                 unsigned int tot_len = 0;
1861
1862                 while (leave == 0)
1863                         leave = qlt_srr_random() % cmd->sg_cnt;
1864
1865                 for (i = 0; i < leave; i++)
1866                         tot_len += cmd->sg[i].length;
1867
1868                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1869                     "Cutting cmd %p (tag %d) buffer"
1870                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1871                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1872                     cmd->bufflen, cmd->sg_cnt);
1873
1874                 cmd->bufflen = tot_len;
1875                 cmd->sg_cnt = leave;
1876         }
1877
1878         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1879                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1880
1881                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1882                     "Cutting cmd %p (tag %d) buffer head "
1883                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1884                     cmd->bufflen);
1885                 if (offset == 0)
1886                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1887                 else if (qlt_set_data_offset(cmd, offset)) {
1888                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1889                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1890                 }
1891         }
1892 }
1893 #else
1894 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1895 {}
1896 #endif
1897
1898 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1899         struct qla_tgt_prm *prm)
1900 {
1901         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1902             (uint32_t)sizeof(ctio->u.status1.sense_data));
1903         ctio->u.status0.flags |=
1904             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1905         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1906                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1907                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1908                     CTIO7_FLAGS_CONFORM_REQ);
1909         }
1910         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1911         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1912         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1913                 int i;
1914
1915                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1916                         if (prm->cmd->se_cmd.scsi_status != 0) {
1917                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1918                                     "Skipping EXPLICIT_CONFORM and "
1919                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1920                                     "non GOOD status\n");
1921                                 goto skip_explict_conf;
1922                         }
1923                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1924                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1925                             CTIO7_FLAGS_CONFORM_REQ);
1926                 }
1927 skip_explict_conf:
1928                 ctio->u.status1.flags &=
1929                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1930                 ctio->u.status1.flags |=
1931                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1932                 ctio->u.status1.scsi_status |=
1933                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1934                 ctio->u.status1.sense_length =
1935                     cpu_to_le16(prm->sense_buffer_len);
1936                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1937                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1938                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1939 #if 0
1940                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1941                         static int q;
1942                         if (q < 10) {
1943                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1944                                     "qla_target(%d): %d bytes of sense "
1945                                     "lost", prm->tgt->ha->vp_idx,
1946                                     prm->sense_buffer_len % 4);
1947                                 q++;
1948                         }
1949                 }
1950 #endif
1951         } else {
1952                 ctio->u.status1.flags &=
1953                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1954                 ctio->u.status1.flags |=
1955                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1956                 ctio->u.status1.sense_length = 0;
1957                 memset(ctio->u.status1.sense_data, 0,
1958                     sizeof(ctio->u.status1.sense_data));
1959         }
1960
1961         /* Sense with len > 24, is it possible ??? */
1962 }
1963
1964
1965
1966 /* diff  */
1967 static inline int
1968 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1969 {
1970         /*
1971          * Uncomment when corresponding SCSI changes are done.
1972          *
1973          if (!sp->cmd->prot_chk)
1974          return 0;
1975          *
1976          */
1977         switch (se_cmd->prot_op) {
1978         case TARGET_PROT_DOUT_INSERT:
1979         case TARGET_PROT_DIN_STRIP:
1980                 if (ql2xenablehba_err_chk >= 1)
1981                         return 1;
1982                 break;
1983         case TARGET_PROT_DOUT_PASS:
1984         case TARGET_PROT_DIN_PASS:
1985                 if (ql2xenablehba_err_chk >= 2)
1986                         return 1;
1987                 break;
1988         case TARGET_PROT_DIN_INSERT:
1989         case TARGET_PROT_DOUT_STRIP:
1990                 return 1;
1991         default:
1992                 break;
1993         }
1994         return 0;
1995 }
1996
1997 /*
1998  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1999  *
2000  */
2001 static inline void
2002 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2003 {
2004         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2005
2006         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2007          * have been immplemented by TCM, before AppTag is avail.
2008          * Look for modesense_handlers[]
2009          */
2010         ctx->app_tag = 0;
2011         ctx->app_tag_mask[0] = 0x0;
2012         ctx->app_tag_mask[1] = 0x0;
2013
2014         switch (se_cmd->prot_type) {
2015         case TARGET_DIF_TYPE0_PROT:
2016                 /*
2017                  * No check for ql2xenablehba_err_chk, as it would be an
2018                  * I/O error if hba tag generation is not done.
2019                  */
2020                 ctx->ref_tag = cpu_to_le32(lba);
2021
2022                 if (!qlt_hba_err_chk_enabled(se_cmd))
2023                         break;
2024
2025                 /* enable ALL bytes of the ref tag */
2026                 ctx->ref_tag_mask[0] = 0xff;
2027                 ctx->ref_tag_mask[1] = 0xff;
2028                 ctx->ref_tag_mask[2] = 0xff;
2029                 ctx->ref_tag_mask[3] = 0xff;
2030                 break;
2031         /*
2032          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2033          * 16 bit app tag.
2034          */
2035         case TARGET_DIF_TYPE1_PROT:
2036                 ctx->ref_tag = cpu_to_le32(lba);
2037
2038                 if (!qlt_hba_err_chk_enabled(se_cmd))
2039                         break;
2040
2041                 /* enable ALL bytes of the ref tag */
2042                 ctx->ref_tag_mask[0] = 0xff;
2043                 ctx->ref_tag_mask[1] = 0xff;
2044                 ctx->ref_tag_mask[2] = 0xff;
2045                 ctx->ref_tag_mask[3] = 0xff;
2046                 break;
2047         /*
2048          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2049          * match LBA in CDB + N
2050          */
2051         case TARGET_DIF_TYPE2_PROT:
2052                 ctx->ref_tag = cpu_to_le32(lba);
2053
2054                 if (!qlt_hba_err_chk_enabled(se_cmd))
2055                         break;
2056
2057                 /* enable ALL bytes of the ref tag */
2058                 ctx->ref_tag_mask[0] = 0xff;
2059                 ctx->ref_tag_mask[1] = 0xff;
2060                 ctx->ref_tag_mask[2] = 0xff;
2061                 ctx->ref_tag_mask[3] = 0xff;
2062                 break;
2063
2064         /* For Type 3 protection: 16 bit GUARD only */
2065         case TARGET_DIF_TYPE3_PROT:
2066                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2067                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2068                 break;
2069         }
2070 }
2071
2072
2073 static inline int
2074 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2075 {
2076         uint32_t                *cur_dsd;
2077         int                     sgc;
2078         uint32_t                transfer_length = 0;
2079         uint32_t                data_bytes;
2080         uint32_t                dif_bytes;
2081         uint8_t                 bundling = 1;
2082         uint8_t                 *clr_ptr;
2083         struct crc_context      *crc_ctx_pkt = NULL;
2084         struct qla_hw_data      *ha;
2085         struct ctio_crc2_to_fw  *pkt;
2086         dma_addr_t              crc_ctx_dma;
2087         uint16_t                fw_prot_opts = 0;
2088         struct qla_tgt_cmd      *cmd = prm->cmd;
2089         struct se_cmd           *se_cmd = &cmd->se_cmd;
2090         uint32_t h;
2091         struct atio_from_isp *atio = &prm->cmd->atio;
2092         uint16_t t16;
2093
2094         sgc = 0;
2095         ha = vha->hw;
2096
2097         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2098         prm->pkt = pkt;
2099         memset(pkt, 0, sizeof(*pkt));
2100
2101         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2102                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2103                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2104                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2105
2106         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2107             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2108                 bundling = 0;
2109
2110         /* Compute dif len and adjust data len to incude protection */
2111         data_bytes = cmd->bufflen;
2112         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2113
2114         switch (se_cmd->prot_op) {
2115         case TARGET_PROT_DIN_INSERT:
2116         case TARGET_PROT_DOUT_STRIP:
2117                 transfer_length = data_bytes;
2118                 data_bytes += dif_bytes;
2119                 break;
2120
2121         case TARGET_PROT_DIN_STRIP:
2122         case TARGET_PROT_DOUT_INSERT:
2123         case TARGET_PROT_DIN_PASS:
2124         case TARGET_PROT_DOUT_PASS:
2125                 transfer_length = data_bytes + dif_bytes;
2126                 break;
2127
2128         default:
2129                 BUG();
2130                 break;
2131         }
2132
2133         if (!qlt_hba_err_chk_enabled(se_cmd))
2134                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2135         /* HBA error checking enabled */
2136         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2137                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2138                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2139                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2140                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2141                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2142         }
2143
2144         switch (se_cmd->prot_op) {
2145         case TARGET_PROT_DIN_INSERT:
2146         case TARGET_PROT_DOUT_INSERT:
2147                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2148                 break;
2149         case TARGET_PROT_DIN_STRIP:
2150         case TARGET_PROT_DOUT_STRIP:
2151                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2152                 break;
2153         case TARGET_PROT_DIN_PASS:
2154         case TARGET_PROT_DOUT_PASS:
2155                 fw_prot_opts |= PO_MODE_DIF_PASS;
2156                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2157                 break;
2158         default:/* Normal Request */
2159                 fw_prot_opts |= PO_MODE_DIF_PASS;
2160                 break;
2161         }
2162
2163
2164         /* ---- PKT ---- */
2165         /* Update entry type to indicate Command Type CRC_2 IOCB */
2166         pkt->entry_type  = CTIO_CRC2;
2167         pkt->entry_count = 1;
2168         pkt->vp_index = vha->vp_idx;
2169
2170         h = qlt_make_handle(vha);
2171         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2172                 /*
2173                  * CTIO type 7 from the firmware doesn't provide a way to
2174                  * know the initiator's LOOP ID, hence we can't find
2175                  * the session and, so, the command.
2176                  */
2177                 return -EAGAIN;
2178         } else
2179                 ha->tgt.cmds[h-1] = prm->cmd;
2180
2181
2182         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2183         pkt->nport_handle = prm->cmd->loop_id;
2184         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2185         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2186         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2187         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2188         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2189
2190         /* silence compile warning */
2191         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2192         pkt->ox_id  = cpu_to_le16(t16);
2193
2194         t16 = (atio->u.isp24.attr << 9);
2195         pkt->flags |= cpu_to_le16(t16);
2196         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2197
2198         /* Set transfer direction */
2199         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2200                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2201         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2202                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2203
2204
2205         pkt->dseg_count = prm->tot_dsds;
2206         /* Fibre channel byte count */
2207         pkt->transfer_length = cpu_to_le32(transfer_length);
2208
2209
2210         /* ----- CRC context -------- */
2211
2212         /* Allocate CRC context from global pool */
2213         crc_ctx_pkt = cmd->ctx =
2214             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2215
2216         if (!crc_ctx_pkt)
2217                 goto crc_queuing_error;
2218
2219         /* Zero out CTX area. */
2220         clr_ptr = (uint8_t *)crc_ctx_pkt;
2221         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2222
2223         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2224         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2225
2226         /* Set handle */
2227         crc_ctx_pkt->handle = pkt->handle;
2228
2229         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2230
2231         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2232         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2233         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2234
2235
2236         if (!bundling) {
2237                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2238         } else {
2239                 /*
2240                  * Configure Bundling if we need to fetch interlaving
2241                  * protection PCI accesses
2242                  */
2243                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2244                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2245                 crc_ctx_pkt->u.bundling.dseg_count =
2246                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2247                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2248         }
2249
2250         /* Finish the common fields of CRC pkt */
2251         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2252         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2253         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2254         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2255
2256
2257         /* Walks data segments */
2258         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2259
2260         if (!bundling && prm->prot_seg_cnt) {
2261                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2262                         prm->tot_dsds, cmd))
2263                         goto crc_queuing_error;
2264         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2265                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2266                 goto crc_queuing_error;
2267
2268         if (bundling && prm->prot_seg_cnt) {
2269                 /* Walks dif segments */
2270                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2271
2272                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2273                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2274                         prm->prot_seg_cnt, cmd))
2275                         goto crc_queuing_error;
2276         }
2277         return QLA_SUCCESS;
2278
2279 crc_queuing_error:
2280         /* Cleanup will be performed by the caller */
2281
2282         return QLA_FUNCTION_FAILED;
2283 }
2284
2285
2286 /*
2287  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2288  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2289  */
2290 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2291         uint8_t scsi_status)
2292 {
2293         struct scsi_qla_host *vha = cmd->vha;
2294         struct qla_hw_data *ha = vha->hw;
2295         struct ctio7_to_24xx *pkt;
2296         struct qla_tgt_prm prm;
2297         uint32_t full_req_cnt = 0;
2298         unsigned long flags = 0;
2299         int res;
2300
2301         memset(&prm, 0, sizeof(prm));
2302         qlt_check_srr_debug(cmd, &xmit_type);
2303
2304         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2305             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2306             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2307             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2308             &cmd->se_cmd);
2309
2310         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2311             &full_req_cnt);
2312         if (unlikely(res != 0)) {
2313                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2314                         return 0;
2315
2316                 return res;
2317         }
2318
2319         spin_lock_irqsave(&ha->hardware_lock, flags);
2320
2321         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2322                 /*
2323                  * Either a chip reset is active or this request was from
2324                  * previous life, just abort the processing.
2325                  */
2326                 cmd->state = QLA_TGT_STATE_PROCESSED;
2327                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2328                 ql_dbg(ql_dbg_async, vha, 0xe101,
2329                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2330                         qla2x00_reset_active(vha), cmd->reset_count,
2331                         ha->chip_reset);
2332                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2333                 return 0;
2334         }
2335
2336         /* Does F/W have an IOCBs for this request */
2337         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2338         if (unlikely(res))
2339                 goto out_unmap_unlock;
2340
2341         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2342                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2343         else
2344                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2345         if (unlikely(res != 0)) {
2346                 vha->req->cnt += full_req_cnt;
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                 vha->req->cnt += prm.req_cnt;
2488                 goto out_unlock_free_unmap;
2489         }
2490
2491         pkt = (struct ctio7_to_24xx *)prm.pkt;
2492         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2493             CTIO7_FLAGS_STATUS_MODE_0);
2494
2495         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2496                 qlt_load_data_segments(&prm, vha);
2497
2498         cmd->state = QLA_TGT_STATE_NEED_DATA;
2499         cmd->cmd_sent_to_fw = 1;
2500
2501         /* Memory Barrier */
2502         wmb();
2503         qla2x00_start_iocbs(vha, vha->req);
2504         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2505
2506         return res;
2507
2508 out_unlock_free_unmap:
2509         qlt_unmap_sg(vha, cmd);
2510         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2511
2512         return res;
2513 }
2514 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2515
2516
2517 /*
2518  * Checks the guard or meta-data for the type of error
2519  * detected by the HBA.
2520  */
2521 static inline int
2522 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2523                 struct ctio_crc_from_fw *sts)
2524 {
2525         uint8_t         *ap = &sts->actual_dif[0];
2526         uint8_t         *ep = &sts->expected_dif[0];
2527         uint32_t        e_ref_tag, a_ref_tag;
2528         uint16_t        e_app_tag, a_app_tag;
2529         uint16_t        e_guard, a_guard;
2530         uint64_t        lba = cmd->se_cmd.t_task_lba;
2531
2532         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2533         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2534         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2535
2536         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2537         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2538         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2539
2540         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2541             "iocb(s) %p Returned STATUS.\n", sts);
2542
2543         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2544             "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",
2545             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2546             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2547
2548         /*
2549          * Ignore sector if:
2550          * For type     3: ref & app tag is all 'f's
2551          * For type 0,1,2: app tag is all 'f's
2552          */
2553         if ((a_app_tag == 0xffff) &&
2554             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2555              (a_ref_tag == 0xffffffff))) {
2556                 uint32_t blocks_done;
2557
2558                 /* 2TB boundary case covered automatically with this */
2559                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2560                 cmd->se_cmd.bad_sector = e_ref_tag;
2561                 cmd->se_cmd.pi_err = 0;
2562                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2563                         "need to return scsi good\n");
2564
2565                 /* Update protection tag */
2566                 if (cmd->prot_sg_cnt) {
2567                         uint32_t i, j = 0, k = 0, num_ent;
2568                         struct scatterlist *sg, *sgl;
2569
2570
2571                         sgl = cmd->prot_sg;
2572
2573                         /* Patch the corresponding protection tags */
2574                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2575                                 num_ent = sg_dma_len(sg) / 8;
2576                                 if (k + num_ent < blocks_done) {
2577                                         k += num_ent;
2578                                         continue;
2579                                 }
2580                                 j = blocks_done - k - 1;
2581                                 k = blocks_done;
2582                                 break;
2583                         }
2584
2585                         if (k != blocks_done) {
2586                                 ql_log(ql_log_warn, vha, 0xf076,
2587                                     "unexpected tag values tag:lba=%u:%llu)\n",
2588                                     e_ref_tag, (unsigned long long)lba);
2589                                 goto out;
2590                         }
2591
2592 #if 0
2593                         struct sd_dif_tuple *spt;
2594                         /* TODO:
2595                          * This section came from initiator. Is it valid here?
2596                          * should ulp be override with actual val???
2597                          */
2598                         spt = page_address(sg_page(sg)) + sg->offset;
2599                         spt += j;
2600
2601                         spt->app_tag = 0xffff;
2602                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2603                                 spt->ref_tag = 0xffffffff;
2604 #endif
2605                 }
2606
2607                 return 0;
2608         }
2609
2610         /* check guard */
2611         if (e_guard != a_guard) {
2612                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2613                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2614
2615                 ql_log(ql_log_warn, vha, 0xe076,
2616                     "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",
2617                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2618                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2619                     a_guard, e_guard, cmd);
2620                 goto out;
2621         }
2622
2623         /* check ref tag */
2624         if (e_ref_tag != a_ref_tag) {
2625                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2626                 cmd->se_cmd.bad_sector = e_ref_tag;
2627
2628                 ql_log(ql_log_warn, vha, 0xe077,
2629                         "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",
2630                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2631                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2632                         a_guard, e_guard, cmd);
2633                 goto out;
2634         }
2635
2636         /* check appl tag */
2637         if (e_app_tag != a_app_tag) {
2638                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2639                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2640
2641                 ql_log(ql_log_warn, vha, 0xe078,
2642                         "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",
2643                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2644                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2645                         a_guard, e_guard, cmd);
2646                 goto out;
2647         }
2648 out:
2649         return 1;
2650 }
2651
2652
2653 /* If hardware_lock held on entry, might drop it, then reaquire */
2654 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2655 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2656         struct qla_tgt_cmd *cmd,
2657         struct atio_from_isp *atio)
2658 {
2659         struct ctio7_to_24xx *ctio24;
2660         struct qla_hw_data *ha = vha->hw;
2661         request_t *pkt;
2662         int ret = 0;
2663         uint16_t temp;
2664
2665         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2666
2667         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2668         if (pkt == NULL) {
2669                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2670                     "qla_target(%d): %s failed: unable to allocate "
2671                     "request packet\n", vha->vp_idx, __func__);
2672                 return -ENOMEM;
2673         }
2674
2675         if (cmd != NULL) {
2676                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2677                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2678                             "qla_target(%d): Terminating cmd %p with "
2679                             "incorrect state %d\n", vha->vp_idx, cmd,
2680                             cmd->state);
2681                 } else
2682                         ret = 1;
2683         }
2684
2685         pkt->entry_count = 1;
2686         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2687
2688         ctio24 = (struct ctio7_to_24xx *)pkt;
2689         ctio24->entry_type = CTIO_TYPE7;
2690         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2691         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2692         ctio24->vp_index = vha->vp_idx;
2693         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2694         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2695         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2696         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2697         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2698             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2699                 CTIO7_FLAGS_TERMINATE);
2700         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2701         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2702
2703         /* Most likely, it isn't needed */
2704         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2705             &atio->u.isp24.fcp_cmnd.add_cdb[
2706             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2707         if (ctio24->u.status1.residual != 0)
2708                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2709
2710         /* Memory Barrier */
2711         wmb();
2712         qla2x00_start_iocbs(vha, vha->req);
2713         return ret;
2714 }
2715
2716 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2717         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2718 {
2719         unsigned long flags = 0;
2720         int rc;
2721
2722         if (qlt_issue_marker(vha, ha_locked) < 0)
2723                 return;
2724
2725         if (ha_locked) {
2726                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2727                 if (rc == -ENOMEM)
2728                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2729                 goto done;
2730         }
2731         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2732         rc = __qlt_send_term_exchange(vha, cmd, atio);
2733         if (rc == -ENOMEM)
2734                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2735
2736 done:
2737         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2738             !cmd->cmd_sent_to_fw)) {
2739                 if (cmd->sg_mapped)
2740                         qlt_unmap_sg(vha, cmd);
2741                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2742         }
2743
2744         if (!ha_locked)
2745                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2746
2747         return;
2748 }
2749
2750 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2751 {
2752         struct list_head free_list;
2753         struct qla_tgt_cmd *cmd, *tcmd;
2754
2755         vha->hw->tgt.leak_exchg_thresh_hold =
2756             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2757
2758         cmd = tcmd = NULL;
2759         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2760                 INIT_LIST_HEAD(&free_list);
2761                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2762
2763                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2764                         list_del(&cmd->cmd_list);
2765                         /* This cmd was never sent to TCM.  There is no need
2766                          * to schedule free or call free_cmd
2767                          */
2768                         qlt_free_cmd(cmd);
2769                         vha->hw->tgt.num_qfull_cmds_alloc--;
2770                 }
2771         }
2772         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2773 }
2774
2775 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2776 {
2777         uint32_t total_leaked;
2778
2779         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2780
2781         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2782             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2783
2784                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2785                     "Chip reset due to exchange starvation: %d/%d.\n",
2786                     total_leaked, vha->hw->fw_xcb_count);
2787
2788                 if (IS_P3P_TYPE(vha->hw))
2789                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2790                 else
2791                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2792                 qla2xxx_wake_dpc(vha);
2793         }
2794
2795 }
2796
2797 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2798 {
2799         struct qla_tgt_sess *sess = cmd->sess;
2800
2801         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2802             "%s: se_cmd[%p] ox_id %04x\n",
2803             __func__, &cmd->se_cmd,
2804             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2805
2806         BUG_ON(cmd->cmd_in_wq);
2807
2808         if (!cmd->q_full)
2809                 qlt_decr_num_pend_cmds(cmd->vha);
2810
2811         BUG_ON(cmd->sg_mapped);
2812         cmd->jiffies_at_free = get_jiffies_64();
2813         if (unlikely(cmd->free_sg))
2814                 kfree(cmd->sg);
2815
2816         if (!sess || !sess->se_sess) {
2817                 WARN_ON(1);
2818                 return;
2819         }
2820         cmd->jiffies_at_free = get_jiffies_64();
2821         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2822 }
2823 EXPORT_SYMBOL(qlt_free_cmd);
2824
2825 /* ha->hardware_lock supposed to be held on entry */
2826 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2827         struct qla_tgt_cmd *cmd, void *ctio)
2828 {
2829         struct qla_tgt_srr_ctio *sc;
2830         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831         struct qla_tgt_srr_imm *imm;
2832
2833         tgt->ctio_srr_id++;
2834         cmd->cmd_flags |= BIT_15;
2835
2836         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2837             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2838
2839         if (!ctio) {
2840                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2841                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2842                     vha->vp_idx);
2843                 return -EINVAL;
2844         }
2845
2846         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2847         if (sc != NULL) {
2848                 sc->cmd = cmd;
2849                 /* IRQ is already OFF */
2850                 spin_lock(&tgt->srr_lock);
2851                 sc->srr_id = tgt->ctio_srr_id;
2852                 list_add_tail(&sc->srr_list_entry,
2853                     &tgt->srr_ctio_list);
2854                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2855                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2856                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2857                         int found = 0;
2858                         list_for_each_entry(imm, &tgt->srr_imm_list,
2859                             srr_list_entry) {
2860                                 if (imm->srr_id == sc->srr_id) {
2861                                         found = 1;
2862                                         break;
2863                                 }
2864                         }
2865                         if (found) {
2866                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2867                                     "Scheduling srr work\n");
2868                                 schedule_work(&tgt->srr_work);
2869                         } else {
2870                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2871                                     "qla_target(%d): imm_srr_id "
2872                                     "== ctio_srr_id (%d), but there is no "
2873                                     "corresponding SRR IMM, deleting CTIO "
2874                                     "SRR %p\n", vha->vp_idx,
2875                                     tgt->ctio_srr_id, sc);
2876                                 list_del(&sc->srr_list_entry);
2877                                 spin_unlock(&tgt->srr_lock);
2878
2879                                 kfree(sc);
2880                                 return -EINVAL;
2881                         }
2882                 }
2883                 spin_unlock(&tgt->srr_lock);
2884         } else {
2885                 struct qla_tgt_srr_imm *ti;
2886
2887                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2888                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2889                     vha->vp_idx);
2890                 spin_lock(&tgt->srr_lock);
2891                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2892                     srr_list_entry) {
2893                         if (imm->srr_id == tgt->ctio_srr_id) {
2894                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2895                                     "IMM SRR %p deleted (id %d)\n",
2896                                     imm, imm->srr_id);
2897                                 list_del(&imm->srr_list_entry);
2898                                 qlt_reject_free_srr_imm(vha, imm, 1);
2899                         }
2900                 }
2901                 spin_unlock(&tgt->srr_lock);
2902
2903                 return -ENOMEM;
2904         }
2905
2906         return 0;
2907 }
2908
2909 /*
2910  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2911  */
2912 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2913         struct qla_tgt_cmd *cmd, uint32_t status)
2914 {
2915         int term = 0;
2916
2917         if (ctio != NULL) {
2918                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2919                 term = !(c->flags &
2920                     __constant_cpu_to_le16(OF_TERM_EXCH));
2921         } else
2922                 term = 1;
2923
2924         if (term)
2925                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2926
2927         return term;
2928 }
2929
2930 /* ha->hardware_lock supposed to be held on entry */
2931 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2932         uint32_t handle)
2933 {
2934         struct qla_hw_data *ha = vha->hw;
2935
2936         handle--;
2937         if (ha->tgt.cmds[handle] != NULL) {
2938                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2939                 ha->tgt.cmds[handle] = NULL;
2940                 return cmd;
2941         } else
2942                 return NULL;
2943 }
2944
2945 /* ha->hardware_lock supposed to be held on entry */
2946 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2947         uint32_t handle, void *ctio)
2948 {
2949         struct qla_tgt_cmd *cmd = NULL;
2950
2951         /* Clear out internal marks */
2952         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2953             CTIO_INTERMEDIATE_HANDLE_MARK);
2954
2955         if (handle != QLA_TGT_NULL_HANDLE) {
2956                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2957                         return NULL;
2958
2959                 /* handle-1 is actually used */
2960                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2961                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2962                             "qla_target(%d): Wrong handle %x received\n",
2963                             vha->vp_idx, handle);
2964                         return NULL;
2965                 }
2966                 cmd = qlt_get_cmd(vha, handle);
2967                 if (unlikely(cmd == NULL)) {
2968                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2969                             "qla_target(%d): Suspicious: unable to "
2970                             "find the command with handle %x\n", vha->vp_idx,
2971                             handle);
2972                         return NULL;
2973                 }
2974         } else if (ctio != NULL) {
2975                 /* We can't get loop ID from CTIO7 */
2976                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2977                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2978                     "support NULL handles\n", vha->vp_idx);
2979                 return NULL;
2980         }
2981
2982         return cmd;
2983 }
2984
2985 /* hardware_lock should be held by caller. */
2986 static void
2987 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2988 {
2989         struct qla_hw_data *ha = vha->hw;
2990         uint32_t handle;
2991
2992         if (cmd->sg_mapped)
2993                 qlt_unmap_sg(vha, cmd);
2994
2995         handle = qlt_make_handle(vha);
2996
2997         /* TODO: fix debug message type and ids. */
2998         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2999                 ql_dbg(ql_dbg_io, vha, 0xff00,
3000                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3001         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3002                 cmd->write_data_transferred = 0;
3003                 cmd->state = QLA_TGT_STATE_DATA_IN;
3004
3005                 ql_dbg(ql_dbg_io, vha, 0xff01,
3006                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3007
3008                 ha->tgt.tgt_ops->handle_data(cmd);
3009                 return;
3010         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3011                 ql_dbg(ql_dbg_io, vha, 0xff02,
3012                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3013         } else {
3014                 ql_dbg(ql_dbg_io, vha, 0xff03,
3015                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3016                     cmd->state);
3017                 dump_stack();
3018         }
3019
3020         cmd->cmd_flags |= BIT_12;
3021         ha->tgt.tgt_ops->free_cmd(cmd);
3022 }
3023
3024 void
3025 qlt_host_reset_handler(struct qla_hw_data *ha)
3026 {
3027         struct qla_tgt_cmd *cmd;
3028         unsigned long flags;
3029         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3030         scsi_qla_host_t *vha = NULL;
3031         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3032         uint32_t i;
3033
3034         if (!base_vha->hw->tgt.tgt_ops)
3035                 return;
3036
3037         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3039                         "Target mode disabled\n");
3040                 return;
3041         }
3042
3043         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3044             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3045             base_vha->dpc_flags);
3046
3047         spin_lock_irqsave(&ha->hardware_lock, flags);
3048         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3049                 cmd = qlt_get_cmd(base_vha, i);
3050                 if (!cmd)
3051                         continue;
3052                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3053                 vha = cmd->vha;
3054                 qlt_abort_cmd_on_host_reset(vha, cmd);
3055         }
3056         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3057 }
3058
3059
3060 /*
3061  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3062  */
3063 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3064         uint32_t status, void *ctio)
3065 {
3066         struct qla_hw_data *ha = vha->hw;
3067         struct se_cmd *se_cmd;
3068         const struct target_core_fabric_ops *tfo;
3069         struct qla_tgt_cmd *cmd;
3070
3071         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3072                 /* That could happen only in case of an error/reset/abort */
3073                 if (status != CTIO_SUCCESS) {
3074                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3075                             "Intermediate CTIO received"
3076                             " (status %x)\n", status);
3077                 }
3078                 return;
3079         }
3080
3081         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3082         if (cmd == NULL)
3083                 return;
3084
3085         se_cmd = &cmd->se_cmd;
3086         tfo = se_cmd->se_tfo;
3087         cmd->cmd_sent_to_fw = 0;
3088
3089         qlt_unmap_sg(vha, cmd);
3090
3091         if (unlikely(status != CTIO_SUCCESS)) {
3092                 switch (status & 0xFFFF) {
3093                 case CTIO_LIP_RESET:
3094                 case CTIO_TARGET_RESET:
3095                 case CTIO_ABORTED:
3096                         /* driver request abort via Terminate exchange */
3097                 case CTIO_TIMEOUT:
3098                 case CTIO_INVALID_RX_ID:
3099                         /* They are OK */
3100                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3101                             "qla_target(%d): CTIO with "
3102                             "status %#x received, state %x, se_cmd %p, "
3103                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3104                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3105                             status, cmd->state, se_cmd);
3106                         break;
3107
3108                 case CTIO_PORT_LOGGED_OUT:
3109                 case CTIO_PORT_UNAVAILABLE:
3110                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3111                             "qla_target(%d): CTIO with PORT LOGGED "
3112                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3113                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3114                             status, cmd->state, se_cmd);
3115                         break;
3116
3117                 case CTIO_SRR_RECEIVED:
3118                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3119                             "qla_target(%d): CTIO with SRR_RECEIVED"
3120                             " status %x received (state %x, se_cmd %p)\n",
3121                             vha->vp_idx, status, cmd->state, se_cmd);
3122                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3123                                 break;
3124                         else
3125                                 return;
3126
3127                 case CTIO_DIF_ERROR: {
3128                         struct ctio_crc_from_fw *crc =
3129                                 (struct ctio_crc_from_fw *)ctio;
3130                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3131                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3132                             vha->vp_idx, status, cmd->state, se_cmd,
3133                             *((u64 *)&crc->actual_dif[0]),
3134                             *((u64 *)&crc->expected_dif[0]));
3135
3136                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3137                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3138                                         /* scsi Write/xfer rdy complete */
3139                                         goto skip_term;
3140                                 } else {
3141                                         /* scsi read/xmit respond complete
3142                                          * call handle dif to send scsi status
3143                                          * rather than terminate exchange.
3144                                          */
3145                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3146                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3147                                         return;
3148                                 }
3149                         } else {
3150                                 /* Need to generate a SCSI good completion.
3151                                  * because FW did not send scsi status.
3152                                  */
3153                                 status = 0;
3154                                 goto skip_term;
3155                         }
3156                         break;
3157                 }
3158                 default:
3159                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3160                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3161                             vha->vp_idx, status, cmd->state, se_cmd);
3162                         break;
3163                 }
3164
3165
3166                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3167                  * cmd is already aborted/terminated, we don't
3168                  * need to terminate again.  The exchange is already
3169                  * cleaned up/freed at FW level.  Just cleanup at driver
3170                  * level.
3171                  */
3172                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3173                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3174                         cmd->cmd_flags |= BIT_13;
3175                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3176                                 return;
3177                 }
3178         }
3179 skip_term:
3180
3181         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3182                 ;
3183         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3184                 int rx_status = 0;
3185
3186                 cmd->state = QLA_TGT_STATE_DATA_IN;
3187
3188                 if (unlikely(status != CTIO_SUCCESS))
3189                         rx_status = -EIO;
3190                 else
3191                         cmd->write_data_transferred = 1;
3192
3193                 ha->tgt.tgt_ops->handle_data(cmd);
3194                 return;
3195         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3196                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3197                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3198         } else {
3199                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3200                     "qla_target(%d): A command in state (%d) should "
3201                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3202         }
3203
3204         if (unlikely(status != CTIO_SUCCESS) &&
3205                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3207                 dump_stack();
3208         }
3209
3210
3211         ha->tgt.tgt_ops->free_cmd(cmd);
3212 }
3213
3214 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3215         uint8_t task_codes)
3216 {
3217         int fcp_task_attr;
3218
3219         switch (task_codes) {
3220         case ATIO_SIMPLE_QUEUE:
3221                 fcp_task_attr = TCM_SIMPLE_TAG;
3222                 break;
3223         case ATIO_HEAD_OF_QUEUE:
3224                 fcp_task_attr = TCM_HEAD_TAG;
3225                 break;
3226         case ATIO_ORDERED_QUEUE:
3227                 fcp_task_attr = TCM_ORDERED_TAG;
3228                 break;
3229         case ATIO_ACA_QUEUE:
3230                 fcp_task_attr = TCM_ACA_TAG;
3231                 break;
3232         case ATIO_UNTAGGED:
3233                 fcp_task_attr = TCM_SIMPLE_TAG;
3234                 break;
3235         default:
3236                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3237                     "qla_target: unknown task code %x, use ORDERED instead\n",
3238                     task_codes);
3239                 fcp_task_attr = TCM_ORDERED_TAG;
3240                 break;
3241         }
3242
3243         return fcp_task_attr;
3244 }
3245
3246 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3247                                         uint8_t *);
3248 /*
3249  * Process context for I/O path into tcm_qla2xxx code
3250  */
3251 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3252 {
3253         scsi_qla_host_t *vha = cmd->vha;
3254         struct qla_hw_data *ha = vha->hw;
3255         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3256         struct qla_tgt_sess *sess = cmd->sess;
3257         struct atio_from_isp *atio = &cmd->atio;
3258         unsigned char *cdb;
3259         unsigned long flags;
3260         uint32_t data_length;
3261         int ret, fcp_task_attr, data_dir, bidi = 0;
3262
3263         cmd->cmd_in_wq = 0;
3264         cmd->cmd_flags |= BIT_1;
3265         if (tgt->tgt_stop)
3266                 goto out_term;
3267
3268         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3269         cmd->tag = atio->u.isp24.exchange_addr;
3270         cmd->unpacked_lun = scsilun_to_int(
3271             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3272
3273         if (atio->u.isp24.fcp_cmnd.rddata &&
3274             atio->u.isp24.fcp_cmnd.wrdata) {
3275                 bidi = 1;
3276                 data_dir = DMA_TO_DEVICE;
3277         } else if (atio->u.isp24.fcp_cmnd.rddata)
3278                 data_dir = DMA_FROM_DEVICE;
3279         else if (atio->u.isp24.fcp_cmnd.wrdata)
3280                 data_dir = DMA_TO_DEVICE;
3281         else
3282                 data_dir = DMA_NONE;
3283
3284         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3285             atio->u.isp24.fcp_cmnd.task_attr);
3286         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3287             &atio->u.isp24.fcp_cmnd.add_cdb[
3288             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3289
3290         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3291                                           fcp_task_attr, data_dir, bidi);
3292         if (ret != 0)
3293                 goto out_term;
3294         /*
3295          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3296          */
3297         spin_lock_irqsave(&ha->hardware_lock, flags);
3298         ha->tgt.tgt_ops->put_sess(sess);
3299         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3300         return;
3301
3302 out_term:
3303         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3304         /*
3305          * cmd has not sent to target yet, so pass NULL as the second
3306          * argument to qlt_send_term_exchange() and free the memory here.
3307          */
3308         cmd->cmd_flags |= BIT_2;
3309         spin_lock_irqsave(&ha->hardware_lock, flags);
3310         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3311
3312         qlt_decr_num_pend_cmds(vha);
3313         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3314         ha->tgt.tgt_ops->put_sess(sess);
3315         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3316 }
3317
3318 static void qlt_do_work(struct work_struct *work)
3319 {
3320         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3321
3322         __qlt_do_work(cmd);
3323 }
3324
3325 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3326                                        struct qla_tgt_sess *sess,
3327                                        struct atio_from_isp *atio)
3328 {
3329         struct se_session *se_sess = sess->se_sess;
3330         struct qla_tgt_cmd *cmd;
3331         int tag;
3332
3333         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3334         if (tag < 0)
3335                 return NULL;
3336
3337         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3338         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3339
3340         memcpy(&cmd->atio, atio, sizeof(*atio));
3341         cmd->state = QLA_TGT_STATE_NEW;
3342         cmd->tgt = vha->vha_tgt.qla_tgt;
3343         qlt_incr_num_pend_cmds(vha);
3344         cmd->vha = vha;
3345         cmd->se_cmd.map_tag = tag;
3346         cmd->sess = sess;
3347         cmd->loop_id = sess->loop_id;
3348         cmd->conf_compl_supported = sess->conf_compl_supported;
3349
3350         cmd->cmd_flags = 0;
3351         cmd->jiffies_at_alloc = get_jiffies_64();
3352
3353         cmd->reset_count = vha->hw->chip_reset;
3354
3355         return cmd;
3356 }
3357
3358 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3359                           uint16_t);
3360
3361 static void qlt_create_sess_from_atio(struct work_struct *work)
3362 {
3363         struct qla_tgt_sess_op *op = container_of(work,
3364                                         struct qla_tgt_sess_op, work);
3365         scsi_qla_host_t *vha = op->vha;
3366         struct qla_hw_data *ha = vha->hw;
3367         struct qla_tgt_sess *sess;
3368         struct qla_tgt_cmd *cmd;
3369         unsigned long flags;
3370         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3371
3372         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3373                 "qla_target(%d): Unable to find wwn login"
3374                 " (s_id %x:%x:%x), trying to create it manually\n",
3375                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3376
3377         if (op->atio.u.raw.entry_count > 1) {
3378                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3379                         "Dropping multy entry atio %p\n", &op->atio);
3380                 goto out_term;
3381         }
3382
3383         mutex_lock(&vha->vha_tgt.tgt_mutex);
3384         sess = qlt_make_local_sess(vha, s_id);
3385         /* sess has an extra creation ref. */
3386         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3387
3388         if (!sess)
3389                 goto out_term;
3390         /*
3391          * Now obtain a pre-allocated session tag using the original op->atio
3392          * packet header, and dispatch into __qlt_do_work() using the existing
3393          * process context.
3394          */
3395         cmd = qlt_get_tag(vha, sess, &op->atio);
3396         if (!cmd) {
3397                 spin_lock_irqsave(&ha->hardware_lock, flags);
3398                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3399                 ha->tgt.tgt_ops->put_sess(sess);
3400                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3401                 kfree(op);
3402                 return;
3403         }
3404         /*
3405          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3406          * the extra reference taken above by qlt_make_local_sess()
3407          */
3408         __qlt_do_work(cmd);
3409         kfree(op);
3410         return;
3411
3412 out_term:
3413         spin_lock_irqsave(&ha->hardware_lock, flags);
3414         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3415         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3416         kfree(op);
3417
3418 }
3419
3420 /* ha->hardware_lock supposed to be held on entry */
3421 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3422         struct atio_from_isp *atio)
3423 {
3424         struct qla_hw_data *ha = vha->hw;
3425         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3426         struct qla_tgt_sess *sess;
3427         struct qla_tgt_cmd *cmd;
3428
3429         if (unlikely(tgt->tgt_stop)) {
3430                 ql_dbg(ql_dbg_io, vha, 0x3061,
3431                     "New command while device %p is shutting down\n", tgt);
3432                 return -EFAULT;
3433         }
3434
3435         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3436         if (unlikely(!sess)) {
3437                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3438                                                      GFP_ATOMIC);
3439                 if (!op)
3440                         return -ENOMEM;
3441
3442                 memcpy(&op->atio, atio, sizeof(*atio));
3443                 op->vha = vha;
3444                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3445                 queue_work(qla_tgt_wq, &op->work);
3446                 return 0;
3447         }
3448         /*
3449          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3450          */
3451         kref_get(&sess->se_sess->sess_kref);
3452
3453         cmd = qlt_get_tag(vha, sess, atio);
3454         if (!cmd) {
3455                 ql_dbg(ql_dbg_io, vha, 0x3062,
3456                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3457                 ha->tgt.tgt_ops->put_sess(sess);
3458                 return -ENOMEM;
3459         }
3460
3461         cmd->cmd_in_wq = 1;
3462         cmd->cmd_flags |= BIT_0;
3463         INIT_WORK(&cmd->work, qlt_do_work);
3464         queue_work(qla_tgt_wq, &cmd->work);
3465         return 0;
3466
3467 }
3468
3469 /* ha->hardware_lock supposed to be held on entry */
3470 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3471         int fn, void *iocb, int flags)
3472 {
3473         struct scsi_qla_host *vha = sess->vha;
3474         struct qla_hw_data *ha = vha->hw;
3475         struct qla_tgt_mgmt_cmd *mcmd;
3476         int res;
3477         uint8_t tmr_func;
3478
3479         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3480         if (!mcmd) {
3481                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3482                     "qla_target(%d): Allocation of management "
3483                     "command failed, some commands and their data could "
3484                     "leak\n", vha->vp_idx);
3485                 return -ENOMEM;
3486         }
3487         memset(mcmd, 0, sizeof(*mcmd));
3488         mcmd->sess = sess;
3489
3490         if (iocb) {
3491                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3492                     sizeof(mcmd->orig_iocb.imm_ntfy));
3493         }
3494         mcmd->tmr_func = fn;
3495         mcmd->flags = flags;
3496         mcmd->reset_count = vha->hw->chip_reset;
3497
3498         switch (fn) {
3499         case QLA_TGT_CLEAR_ACA:
3500                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3501                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3502                 tmr_func = TMR_CLEAR_ACA;
3503                 break;
3504
3505         case QLA_TGT_TARGET_RESET:
3506                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3507                     "qla_target(%d): TARGET_RESET received\n",
3508                     sess->vha->vp_idx);
3509                 tmr_func = TMR_TARGET_WARM_RESET;
3510                 break;
3511
3512         case QLA_TGT_LUN_RESET:
3513                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3514                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3515                 tmr_func = TMR_LUN_RESET;
3516                 break;
3517
3518         case QLA_TGT_CLEAR_TS:
3519                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3520                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3521                 tmr_func = TMR_CLEAR_TASK_SET;
3522                 break;
3523
3524         case QLA_TGT_ABORT_TS:
3525                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3526                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3527                 tmr_func = TMR_ABORT_TASK_SET;
3528                 break;
3529 #if 0
3530         case QLA_TGT_ABORT_ALL:
3531                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3532                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3533                     sess->vha->vp_idx);
3534                 tmr_func = 0;
3535                 break;
3536
3537         case QLA_TGT_ABORT_ALL_SESS:
3538                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3539                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3540                     sess->vha->vp_idx);
3541                 tmr_func = 0;
3542                 break;
3543
3544         case QLA_TGT_NEXUS_LOSS_SESS:
3545                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3546                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3547                     sess->vha->vp_idx);
3548                 tmr_func = 0;
3549                 break;
3550
3551         case QLA_TGT_NEXUS_LOSS:
3552                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3553                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3554                 tmr_func = 0;
3555                 break;
3556 #endif
3557         default:
3558                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3559                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3560                     sess->vha->vp_idx, fn);
3561                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3562                 return -ENOSYS;
3563         }
3564
3565         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3566         if (res != 0) {
3567                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3568                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3569                     sess->vha->vp_idx, res);
3570                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3571                 return -EFAULT;
3572         }
3573
3574         return 0;
3575 }
3576
3577 /* ha->hardware_lock supposed to be held on entry */
3578 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3579 {
3580         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3581         struct qla_hw_data *ha = vha->hw;
3582         struct qla_tgt *tgt;
3583         struct qla_tgt_sess *sess;
3584         uint32_t lun, unpacked_lun;
3585         int lun_size, fn;
3586
3587         tgt = vha->vha_tgt.qla_tgt;
3588
3589         lun = a->u.isp24.fcp_cmnd.lun;
3590         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3591         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3592         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3593             a->u.isp24.fcp_hdr.s_id);
3594         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3595
3596         if (!sess) {
3597                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3598                     "qla_target(%d): task mgmt fn 0x%x for "
3599                     "non-existant session\n", vha->vp_idx, fn);
3600                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3601                     sizeof(struct atio_from_isp));
3602         }
3603
3604         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3605 }
3606
3607 /* ha->hardware_lock supposed to be held on entry */
3608 static int __qlt_abort_task(struct scsi_qla_host *vha,
3609         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3610 {
3611         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3612         struct qla_hw_data *ha = vha->hw;
3613         struct qla_tgt_mgmt_cmd *mcmd;
3614         uint32_t lun, unpacked_lun;
3615         int rc;
3616
3617         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3618         if (mcmd == NULL) {
3619                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3620                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3621                     vha->vp_idx, __func__);
3622                 return -ENOMEM;
3623         }
3624         memset(mcmd, 0, sizeof(*mcmd));
3625
3626         mcmd->sess = sess;
3627         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3628             sizeof(mcmd->orig_iocb.imm_ntfy));
3629
3630         lun = a->u.isp24.fcp_cmnd.lun;
3631         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3632         mcmd->reset_count = vha->hw->chip_reset;
3633
3634         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3635             le16_to_cpu(iocb->u.isp2x.seq_id));
3636         if (rc != 0) {
3637                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3638                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3639                     vha->vp_idx, rc);
3640                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3641                 return -EFAULT;
3642         }
3643
3644         return 0;
3645 }
3646
3647 /* ha->hardware_lock supposed to be held on entry */
3648 static int qlt_abort_task(struct scsi_qla_host *vha,
3649         struct imm_ntfy_from_isp *iocb)
3650 {
3651         struct qla_hw_data *ha = vha->hw;
3652         struct qla_tgt_sess *sess;
3653         int loop_id;
3654
3655         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3656
3657         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3658         if (sess == NULL) {
3659                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3660                     "qla_target(%d): task abort for unexisting "
3661                     "session\n", vha->vp_idx);
3662                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3663                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3664         }
3665
3666         return __qlt_abort_task(vha, iocb, sess);
3667 }
3668
3669 /*
3670  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3671  */
3672 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3673         struct imm_ntfy_from_isp *iocb)
3674 {
3675         int res = 0;
3676
3677         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3678             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3679             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3680
3681         switch (iocb->u.isp24.status_subcode) {
3682         case ELS_PLOGI:
3683         case ELS_FLOGI:
3684         case ELS_PRLI:
3685         case ELS_LOGO:
3686         case ELS_PRLO:
3687                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3688                 break;
3689         case ELS_PDISC:
3690         case ELS_ADISC:
3691         {
3692                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3693                 if (tgt->link_reinit_iocb_pending) {
3694                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3695                             0, 0, 0, 0, 0, 0);
3696                         tgt->link_reinit_iocb_pending = 0;
3697                 }
3698                 res = 1; /* send notify ack */
3699                 break;
3700         }
3701
3702         default:
3703                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3704                     "qla_target(%d): Unsupported ELS command %x "
3705                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3706                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3707                 break;
3708         }
3709
3710         return res;
3711 }
3712
3713 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3714 {
3715         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3716         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3717         int i, sg_srr_cnt, bufflen = 0;
3718
3719         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3720             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3721             "cmd->sg_cnt: %u, direction: %d\n",
3722             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3723
3724         /*
3725          * FIXME: Reject non zero SRR relative offset until we can test
3726          * this code properly.
3727          */
3728         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3729         return -1;
3730
3731         if (!cmd->sg || !cmd->sg_cnt) {
3732                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3733                     "Missing cmd->sg or zero cmd->sg_cnt in"
3734                     " qla_tgt_set_data_offset\n");
3735                 return -EINVAL;
3736         }
3737         /*
3738          * Walk the current cmd->sg list until we locate the new sg_srr_start
3739          */
3740         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3741                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3742                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3743                     i, sg, sg_page(sg), sg->length, sg->offset);
3744
3745                 if ((sg->length + tmp) > offset) {
3746                         first_offset = rem_offset;
3747                         sg_srr_start = sg;
3748                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3749                             "Found matching sg[%d], using %p as sg_srr_start, "
3750                             "and using first_offset: %zu\n", i, sg,
3751                             first_offset);
3752                         break;
3753                 }
3754                 tmp += sg->length;
3755                 rem_offset -= sg->length;
3756         }
3757
3758         if (!sg_srr_start) {
3759                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3760                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3761                 return -EINVAL;
3762         }
3763         sg_srr_cnt = (cmd->sg_cnt - i);
3764
3765         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3766         if (!sg_srr) {
3767                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3768                     "Unable to allocate sgp\n");
3769                 return -ENOMEM;
3770         }
3771         sg_init_table(sg_srr, sg_srr_cnt);
3772         sgp = &sg_srr[0];
3773         /*
3774          * Walk the remaining list for sg_srr_start, mapping to the newly
3775          * allocated sg_srr taking first_offset into account.
3776          */
3777         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3778                 if (first_offset) {
3779                         sg_set_page(sgp, sg_page(sg),
3780                             (sg->length - first_offset), first_offset);
3781                         first_offset = 0;
3782                 } else {
3783                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3784                 }
3785                 bufflen += sgp->length;
3786
3787                 sgp = sg_next(sgp);
3788                 if (!sgp)
3789                         break;
3790         }
3791
3792         cmd->sg = sg_srr;
3793         cmd->sg_cnt = sg_srr_cnt;
3794         cmd->bufflen = bufflen;
3795         cmd->offset += offset;
3796         cmd->free_sg = 1;
3797
3798         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3799         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3800             cmd->sg_cnt);
3801         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3802             cmd->bufflen);
3803         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3804             cmd->offset);
3805
3806         if (cmd->sg_cnt < 0)
3807                 BUG();
3808
3809         if (cmd->bufflen < 0)
3810                 BUG();
3811
3812         return 0;
3813 }
3814
3815 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3816         uint32_t srr_rel_offs, int *xmit_type)
3817 {
3818         int res = 0, rel_offs;
3819
3820         rel_offs = srr_rel_offs - cmd->offset;
3821         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3822             srr_rel_offs, rel_offs);
3823
3824         *xmit_type = QLA_TGT_XMIT_ALL;
3825
3826         if (rel_offs < 0) {
3827                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3828                     "qla_target(%d): SRR rel_offs (%d) < 0",
3829                     cmd->vha->vp_idx, rel_offs);
3830                 res = -1;
3831         } else if (rel_offs == cmd->bufflen)
3832                 *xmit_type = QLA_TGT_XMIT_STATUS;
3833         else if (rel_offs > 0)
3834                 res = qlt_set_data_offset(cmd, rel_offs);
3835
3836         return res;
3837 }
3838
3839 /* No locks, thread context */
3840 static void qlt_handle_srr(struct scsi_qla_host *vha,
3841         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3842 {
3843         struct imm_ntfy_from_isp *ntfy =
3844             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3845         struct qla_hw_data *ha = vha->hw;
3846         struct qla_tgt_cmd *cmd = sctio->cmd;
3847         struct se_cmd *se_cmd = &cmd->se_cmd;
3848         unsigned long flags;
3849         int xmit_type = 0, resp = 0;
3850         uint32_t offset;
3851         uint16_t srr_ui;
3852
3853         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3854         srr_ui = ntfy->u.isp24.srr_ui;
3855
3856         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3857             cmd, srr_ui);
3858
3859         switch (srr_ui) {
3860         case SRR_IU_STATUS:
3861                 spin_lock_irqsave(&ha->hardware_lock, flags);
3862                 qlt_send_notify_ack(vha, ntfy,
3863                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3864                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3865                 xmit_type = QLA_TGT_XMIT_STATUS;
3866                 resp = 1;
3867                 break;
3868         case SRR_IU_DATA_IN:
3869                 if (!cmd->sg || !cmd->sg_cnt) {
3870                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3871                             "Unable to process SRR_IU_DATA_IN due to"
3872                             " missing cmd->sg, state: %d\n", cmd->state);
3873                         dump_stack();
3874                         goto out_reject;
3875                 }
3876                 if (se_cmd->scsi_status != 0) {
3877                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3878                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3879                             "scsi_status\n");
3880                         goto out_reject;
3881                 }
3882                 cmd->bufflen = se_cmd->data_length;
3883
3884                 if (qlt_has_data(cmd)) {
3885                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3886                                 goto out_reject;
3887                         spin_lock_irqsave(&ha->hardware_lock, flags);
3888                         qlt_send_notify_ack(vha, ntfy,
3889                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3890                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3891                         resp = 1;
3892                 } else {
3893                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3894                             "qla_target(%d): SRR for in data for cmd "
3895                             "without them (tag %d, SCSI status %d), "
3896                             "reject", vha->vp_idx, cmd->tag,
3897                             cmd->se_cmd.scsi_status);
3898                         goto out_reject;
3899                 }
3900                 break;
3901         case SRR_IU_DATA_OUT:
3902                 if (!cmd->sg || !cmd->sg_cnt) {
3903                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3904                             "Unable to process SRR_IU_DATA_OUT due to"
3905                             " missing cmd->sg\n");
3906                         dump_stack();
3907                         goto out_reject;
3908                 }
3909                 if (se_cmd->scsi_status != 0) {
3910                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3911                             "Rejecting SRR_IU_DATA_OUT"
3912                             " with non GOOD scsi_status\n");
3913                         goto out_reject;
3914                 }
3915                 cmd->bufflen = se_cmd->data_length;
3916
3917                 if (qlt_has_data(cmd)) {
3918                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3919                                 goto out_reject;
3920                         spin_lock_irqsave(&ha->hardware_lock, flags);
3921                         qlt_send_notify_ack(vha, ntfy,
3922                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3923                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3924                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3925                                 cmd->cmd_flags |= BIT_8;
3926                                 qlt_rdy_to_xfer(cmd);
3927                         }
3928                 } else {
3929                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3930                             "qla_target(%d): SRR for out data for cmd "
3931                             "without them (tag %d, SCSI status %d), "
3932                             "reject", vha->vp_idx, cmd->tag,
3933                             cmd->se_cmd.scsi_status);
3934                         goto out_reject;
3935                 }
3936                 break;
3937         default:
3938                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3939                     "qla_target(%d): Unknown srr_ui value %x",
3940                     vha->vp_idx, srr_ui);
3941                 goto out_reject;
3942         }
3943
3944         /* Transmit response in case of status and data-in cases */
3945         if (resp) {
3946                 cmd->cmd_flags |= BIT_7;
3947                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3948         }
3949
3950         return;
3951
3952 out_reject:
3953         spin_lock_irqsave(&ha->hardware_lock, flags);
3954         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3955             NOTIFY_ACK_SRR_FLAGS_REJECT,
3956             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3957             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3958         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3959                 cmd->state = QLA_TGT_STATE_DATA_IN;
3960                 dump_stack();
3961         } else {
3962                 cmd->cmd_flags |= BIT_9;
3963                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3964         }
3965         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3966 }
3967
3968 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3969         struct qla_tgt_srr_imm *imm, int ha_locked)
3970 {
3971         struct qla_hw_data *ha = vha->hw;
3972         unsigned long flags = 0;
3973
3974         if (!ha_locked)
3975                 spin_lock_irqsave(&ha->hardware_lock, flags);
3976
3977         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3978             NOTIFY_ACK_SRR_FLAGS_REJECT,
3979             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3980             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3981
3982         if (!ha_locked)
3983                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3984
3985         kfree(imm);
3986 }
3987
3988 static void qlt_handle_srr_work(struct work_struct *work)
3989 {
3990         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3991         struct scsi_qla_host *vha = tgt->vha;
3992         struct qla_tgt_srr_ctio *sctio;
3993         unsigned long flags;
3994
3995         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3996             tgt);
3997
3998 restart:
3999         spin_lock_irqsave(&tgt->srr_lock, flags);
4000         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4001                 struct qla_tgt_srr_imm *imm, *i, *ti;
4002                 struct qla_tgt_cmd *cmd;
4003                 struct se_cmd *se_cmd;
4004
4005                 imm = NULL;
4006                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4007                                                 srr_list_entry) {
4008                         if (i->srr_id == sctio->srr_id) {
4009                                 list_del(&i->srr_list_entry);
4010                                 if (imm) {
4011                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4012                                           "qla_target(%d): There must be "
4013                                           "only one IMM SRR per CTIO SRR "
4014                                           "(IMM SRR %p, id %d, CTIO %p\n",
4015                                           vha->vp_idx, i, i->srr_id, sctio);
4016                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4017                                 } else
4018                                         imm = i;
4019                         }
4020                 }
4021
4022                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4023                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4024                     sctio->srr_id);
4025
4026                 if (imm == NULL) {
4027                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4028                             "Not found matching IMM for SRR CTIO (id %d)\n",
4029                             sctio->srr_id);
4030                         continue;
4031                 } else
4032                         list_del(&sctio->srr_list_entry);
4033
4034                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4035
4036                 cmd = sctio->cmd;
4037                 /*
4038                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4039                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4040                  * logic..
4041                  */
4042                 cmd->offset = 0;
4043                 if (cmd->free_sg) {
4044                         kfree(cmd->sg);
4045                         cmd->sg = NULL;
4046                         cmd->free_sg = 0;
4047                 }
4048                 se_cmd = &cmd->se_cmd;
4049
4050                 cmd->sg_cnt = se_cmd->t_data_nents;
4051                 cmd->sg = se_cmd->t_data_sg;
4052
4053                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4054                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
4055                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
4056                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
4057                     cmd->sg_cnt, cmd->offset);
4058
4059                 qlt_handle_srr(vha, sctio, imm);
4060
4061                 kfree(imm);
4062                 kfree(sctio);
4063                 goto restart;
4064         }
4065         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4066 }
4067
4068 /* ha->hardware_lock supposed to be held on entry */
4069 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4070         struct imm_ntfy_from_isp *iocb)
4071 {
4072         struct qla_tgt_srr_imm *imm;
4073         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4074         struct qla_tgt_srr_ctio *sctio;
4075
4076         tgt->imm_srr_id++;
4077
4078         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4079             vha->vp_idx);
4080
4081         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4082         if (imm != NULL) {
4083                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4084
4085                 /* IRQ is already OFF */
4086                 spin_lock(&tgt->srr_lock);
4087                 imm->srr_id = tgt->imm_srr_id;
4088                 list_add_tail(&imm->srr_list_entry,
4089                     &tgt->srr_imm_list);
4090                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4091                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4092                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4093                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4094                         int found = 0;
4095                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4096                             srr_list_entry) {
4097                                 if (sctio->srr_id == imm->srr_id) {
4098                                         found = 1;
4099                                         break;
4100                                 }
4101                         }
4102                         if (found) {
4103                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4104                                     "Scheduling srr work\n");
4105                                 schedule_work(&tgt->srr_work);
4106                         } else {
4107                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4108                                     "qla_target(%d): imm_srr_id "
4109                                     "== ctio_srr_id (%d), but there is no "
4110                                     "corresponding SRR CTIO, deleting IMM "
4111                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4112                                     imm);
4113                                 list_del(&imm->srr_list_entry);
4114
4115                                 kfree(imm);
4116
4117                                 spin_unlock(&tgt->srr_lock);
4118                                 goto out_reject;
4119                         }
4120                 }
4121                 spin_unlock(&tgt->srr_lock);
4122         } else {
4123                 struct qla_tgt_srr_ctio *ts;
4124
4125                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4126                     "qla_target(%d): Unable to allocate SRR IMM "
4127                     "entry, SRR request will be rejected\n", vha->vp_idx);
4128
4129                 /* IRQ is already OFF */
4130                 spin_lock(&tgt->srr_lock);
4131                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4132                     srr_list_entry) {
4133                         if (sctio->srr_id == tgt->imm_srr_id) {
4134                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4135                                     "CTIO SRR %p deleted (id %d)\n",
4136                                     sctio, sctio->srr_id);
4137                                 list_del(&sctio->srr_list_entry);
4138                                 qlt_send_term_exchange(vha, sctio->cmd,
4139                                     &sctio->cmd->atio, 1);
4140                                 kfree(sctio);
4141                         }
4142                 }
4143                 spin_unlock(&tgt->srr_lock);
4144                 goto out_reject;
4145         }
4146
4147         return;
4148
4149 out_reject:
4150         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4151             NOTIFY_ACK_SRR_FLAGS_REJECT,
4152             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4153             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4154 }
4155
4156 /*
4157  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4158  */
4159 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4160         struct imm_ntfy_from_isp *iocb)
4161 {
4162         struct qla_hw_data *ha = vha->hw;
4163         uint32_t add_flags = 0;
4164         int send_notify_ack = 1;
4165         uint16_t status;
4166
4167         status = le16_to_cpu(iocb->u.isp2x.status);
4168         switch (status) {
4169         case IMM_NTFY_LIP_RESET:
4170         {
4171                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4172                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4173                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4174                     iocb->u.isp24.status_subcode);
4175
4176                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4177                         send_notify_ack = 0;
4178                 break;
4179         }
4180
4181         case IMM_NTFY_LIP_LINK_REINIT:
4182         {
4183                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4184                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4185                     "qla_target(%d): LINK REINIT (loop %#x, "
4186                     "subcode %x)\n", vha->vp_idx,
4187                     le16_to_cpu(iocb->u.isp24.nport_handle),
4188                     iocb->u.isp24.status_subcode);
4189                 if (tgt->link_reinit_iocb_pending) {
4190                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4191                             0, 0, 0, 0, 0, 0);
4192                 }
4193                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4194                 tgt->link_reinit_iocb_pending = 1;
4195                 /*
4196                  * QLogic requires to wait after LINK REINIT for possible
4197                  * PDISC or ADISC ELS commands
4198                  */
4199                 send_notify_ack = 0;
4200                 break;
4201         }
4202
4203         case IMM_NTFY_PORT_LOGOUT:
4204                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4205                     "qla_target(%d): Port logout (loop "
4206                     "%#x, subcode %x)\n", vha->vp_idx,
4207                     le16_to_cpu(iocb->u.isp24.nport_handle),
4208                     iocb->u.isp24.status_subcode);
4209
4210                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4211                         send_notify_ack = 0;
4212                 /* The sessions will be cleared in the callback, if needed */
4213                 break;
4214
4215         case IMM_NTFY_GLBL_TPRLO:
4216                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4217                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4218                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4219                         send_notify_ack = 0;
4220                 /* The sessions will be cleared in the callback, if needed */
4221                 break;
4222
4223         case IMM_NTFY_PORT_CONFIG:
4224                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4225                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4226                     status);
4227                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4228                         send_notify_ack = 0;
4229                 /* The sessions will be cleared in the callback, if needed */
4230                 break;
4231
4232         case IMM_NTFY_GLBL_LOGO:
4233                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4234                     "qla_target(%d): Link failure detected\n",
4235                     vha->vp_idx);
4236                 /* I_T nexus loss */
4237                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4238                         send_notify_ack = 0;
4239                 break;
4240
4241         case IMM_NTFY_IOCB_OVERFLOW:
4242                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4243                     "qla_target(%d): Cannot provide requested "
4244                     "capability (IOCB overflowed the immediate notify "
4245                     "resource count)\n", vha->vp_idx);
4246                 break;
4247
4248         case IMM_NTFY_ABORT_TASK:
4249                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4250                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4251                     "L %#x)\n", vha->vp_idx,
4252                     le16_to_cpu(iocb->u.isp2x.seq_id),
4253                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4254                     le16_to_cpu(iocb->u.isp2x.lun));
4255                 if (qlt_abort_task(vha, iocb) == 0)
4256                         send_notify_ack = 0;
4257                 break;
4258
4259         case IMM_NTFY_RESOURCE:
4260                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4261                     "qla_target(%d): Out of resources, host %ld\n",
4262                     vha->vp_idx, vha->host_no);
4263                 break;
4264
4265         case IMM_NTFY_MSG_RX:
4266                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4267                     "qla_target(%d): Immediate notify task %x\n",
4268                     vha->vp_idx, iocb->u.isp2x.task_flags);
4269                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4270                         send_notify_ack = 0;
4271                 break;
4272
4273         case IMM_NTFY_ELS:
4274                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4275                         send_notify_ack = 0;
4276                 break;
4277
4278         case IMM_NTFY_SRR:
4279                 qlt_prepare_srr_imm(vha, iocb);
4280                 send_notify_ack = 0;
4281                 break;
4282
4283         default:
4284                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4285                     "qla_target(%d): Received unknown immediate "
4286                     "notify status %x\n", vha->vp_idx, status);
4287                 break;
4288         }
4289
4290         if (send_notify_ack)
4291                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4292 }
4293
4294 /*
4295  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4296  * This function sends busy to ISP 2xxx or 24xx.
4297  */
4298 static int __qlt_send_busy(struct scsi_qla_host *vha,
4299         struct atio_from_isp *atio, uint16_t status)
4300 {
4301         struct ctio7_to_24xx *ctio24;
4302         struct qla_hw_data *ha = vha->hw;
4303         request_t *pkt;
4304         struct qla_tgt_sess *sess = NULL;
4305
4306         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4307             atio->u.isp24.fcp_hdr.s_id);
4308         if (!sess) {
4309                 qlt_send_term_exchange(vha, NULL, atio, 1);
4310                 return 0;
4311         }
4312         /* Sending marker isn't necessary, since we called from ISR */
4313
4314         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4315         if (!pkt) {
4316                 ql_dbg(ql_dbg_io, vha, 0x3063,
4317                     "qla_target(%d): %s failed: unable to allocate "
4318                     "request packet", vha->vp_idx, __func__);
4319                 return -ENOMEM;
4320         }
4321
4322         pkt->entry_count = 1;
4323         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4324
4325         ctio24 = (struct ctio7_to_24xx *)pkt;
4326         ctio24->entry_type = CTIO_TYPE7;
4327         ctio24->nport_handle = sess->loop_id;
4328         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4329         ctio24->vp_index = vha->vp_idx;
4330         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4331         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4332         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4333         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4334         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4335             __constant_cpu_to_le16(
4336                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4337                 CTIO7_FLAGS_DONT_RET_CTIO);
4338         /*
4339          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4340          * if the explicit conformation is used.
4341          */
4342         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4343         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4344         /* Memory Barrier */
4345         wmb();
4346         qla2x00_start_iocbs(vha, vha->req);
4347         return 0;
4348 }
4349
4350 /*
4351  * This routine is used to allocate a command for either a QFull condition
4352  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4353  * out previously.
4354  */
4355 static void
4356 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4357         struct atio_from_isp *atio, uint16_t status, int qfull)
4358 {
4359         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4360         struct qla_hw_data *ha = vha->hw;
4361         struct qla_tgt_sess *sess;
4362         struct se_session *se_sess;
4363         struct qla_tgt_cmd *cmd;
4364         int tag;
4365
4366         if (unlikely(tgt->tgt_stop)) {
4367                 ql_dbg(ql_dbg_io, vha, 0x300a,
4368                         "New command while device %p is shutting down\n", tgt);
4369                 return;
4370         }
4371
4372         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4373                 vha->hw->tgt.num_qfull_cmds_dropped++;
4374                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4375                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4376                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4377                                 vha->hw->tgt.num_qfull_cmds_dropped;
4378
4379                 ql_dbg(ql_dbg_io, vha, 0x3068,
4380                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4381                         vha->vp_idx, __func__,
4382                         vha->hw->tgt.num_qfull_cmds_dropped);
4383
4384                 qlt_chk_exch_leak_thresh_hold(vha);
4385                 return;
4386         }
4387
4388         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4389                 (vha, atio->u.isp24.fcp_hdr.s_id);
4390         if (!sess)
4391                 return;
4392
4393         se_sess = sess->se_sess;
4394
4395         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4396         if (tag < 0)
4397                 return;
4398
4399         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4400         if (!cmd) {
4401                 ql_dbg(ql_dbg_io, vha, 0x3009,
4402                         "qla_target(%d): %s: Allocation of cmd failed\n",
4403                         vha->vp_idx, __func__);
4404
4405                 vha->hw->tgt.num_qfull_cmds_dropped++;
4406                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4407                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4408                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4409                                 vha->hw->tgt.num_qfull_cmds_dropped;
4410
4411                 qlt_chk_exch_leak_thresh_hold(vha);
4412                 return;
4413         }
4414
4415         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4416
4417         qlt_incr_num_pend_cmds(vha);
4418         INIT_LIST_HEAD(&cmd->cmd_list);
4419         memcpy(&cmd->atio, atio, sizeof(*atio));
4420
4421         cmd->tgt = vha->vha_tgt.qla_tgt;
4422         cmd->vha = vha;
4423         cmd->reset_count = vha->hw->chip_reset;
4424         cmd->q_full = 1;
4425
4426         if (qfull) {
4427                 cmd->q_full = 1;
4428                 /* NOTE: borrowing the state field to carry the status */
4429                 cmd->state = status;
4430         } else
4431                 cmd->term_exchg = 1;
4432
4433         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4434
4435         vha->hw->tgt.num_qfull_cmds_alloc++;
4436         if (vha->hw->tgt.num_qfull_cmds_alloc >
4437                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4438                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4439                         vha->hw->tgt.num_qfull_cmds_alloc;
4440 }
4441
4442 int
4443 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4444 {
4445         struct qla_hw_data *ha = vha->hw;
4446         unsigned long flags;
4447         struct qla_tgt_cmd *cmd, *tcmd;
4448         struct list_head free_list;
4449         int rc = 0;
4450
4451         if (list_empty(&ha->tgt.q_full_list))
4452                 return 0;
4453
4454         INIT_LIST_HEAD(&free_list);
4455
4456         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4457
4458         if (list_empty(&ha->tgt.q_full_list)) {
4459                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4460                 return 0;
4461         }
4462
4463         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4464                 if (cmd->q_full)
4465                         /* cmd->state is a borrowed field to hold status */
4466                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4467                 else if (cmd->term_exchg)
4468                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4469
4470                 if (rc == -ENOMEM)
4471                         break;
4472
4473                 if (cmd->q_full)
4474                         ql_dbg(ql_dbg_io, vha, 0x3006,
4475                             "%s: busy sent for ox_id[%04x]\n", __func__,
4476                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4477                 else if (cmd->term_exchg)
4478                         ql_dbg(ql_dbg_io, vha, 0x3007,
4479                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4480                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4481                 else
4482                         ql_dbg(ql_dbg_io, vha, 0x3008,
4483                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4484                             cmd);
4485
4486                 list_del(&cmd->cmd_list);
4487                 list_add_tail(&cmd->cmd_list, &free_list);
4488
4489                 /* piggy back on hardware_lock for protection */
4490                 vha->hw->tgt.num_qfull_cmds_alloc--;
4491         }
4492         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4493
4494         cmd = NULL;
4495
4496         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4497                 list_del(&cmd->cmd_list);
4498                 /* This cmd was never sent to TCM.  There is no need
4499                  * to schedule free or call free_cmd
4500                  */
4501                 qlt_free_cmd(cmd);
4502         }
4503         return rc;
4504 }
4505
4506 static void
4507 qlt_send_busy(struct scsi_qla_host *vha,
4508         struct atio_from_isp *atio, uint16_t status)
4509 {
4510         int rc = 0;
4511
4512         rc = __qlt_send_busy(vha, atio, status);
4513         if (rc == -ENOMEM)
4514                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4515 }
4516
4517 static int
4518 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4519         struct atio_from_isp *atio)
4520 {
4521         struct qla_hw_data *ha = vha->hw;
4522         uint16_t status;
4523
4524         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4525                 return 0;
4526
4527         status = temp_sam_status;
4528         qlt_send_busy(vha, atio, status);
4529         return 1;
4530 }
4531
4532 /* ha->hardware_lock supposed to be held on entry */
4533 /* called via callback from qla2xxx */
4534 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4535         struct atio_from_isp *atio)
4536 {
4537         struct qla_hw_data *ha = vha->hw;
4538         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4539         int rc;
4540
4541         if (unlikely(tgt == NULL)) {
4542                 ql_dbg(ql_dbg_io, vha, 0x3064,
4543                     "ATIO pkt, but no tgt (ha %p)", ha);
4544                 return;
4545         }
4546         /*
4547          * In tgt_stop mode we also should allow all requests to pass.
4548          * Otherwise, some commands can stuck.
4549          */
4550
4551         tgt->irq_cmd_count++;
4552
4553         switch (atio->u.raw.entry_type) {
4554         case ATIO_TYPE7:
4555                 if (unlikely(atio->u.isp24.exchange_addr ==
4556                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4557                         ql_dbg(ql_dbg_io, vha, 0x3065,
4558                             "qla_target(%d): ATIO_TYPE7 "
4559                             "received with UNKNOWN exchange address, "
4560                             "sending QUEUE_FULL\n", vha->vp_idx);
4561                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4562                         break;
4563                 }
4564
4565
4566
4567                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4568                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4569                         if (rc != 0) {
4570                                 tgt->irq_cmd_count--;
4571                                 return;
4572                         }
4573                         rc = qlt_handle_cmd_for_atio(vha, atio);
4574                 } else {
4575                         rc = qlt_handle_task_mgmt(vha, atio);
4576                 }
4577                 if (unlikely(rc != 0)) {
4578                         if (rc == -ESRCH) {
4579 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4580                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4581 #else
4582                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4583 #endif
4584                         } else {
4585                                 if (tgt->tgt_stop) {
4586                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4587                                             "qla_target: Unable to send "
4588                                             "command to target for req, "
4589                                             "ignoring.\n");
4590                                 } else {
4591                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4592                                             "qla_target(%d): Unable to send "
4593                                             "command to target, sending BUSY "
4594                                             "status.\n", vha->vp_idx);
4595                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4596                                 }
4597                         }
4598                 }
4599                 break;
4600
4601         case IMMED_NOTIFY_TYPE:
4602         {
4603                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4604                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4605                             "qla_target(%d): Received ATIO packet %x "
4606                             "with error status %x\n", vha->vp_idx,
4607                             atio->u.raw.entry_type,
4608                             atio->u.isp2x.entry_status);
4609                         break;
4610                 }
4611                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4612                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4613                 break;
4614         }
4615
4616         default:
4617                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4618                     "qla_target(%d): Received unknown ATIO atio "
4619                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4620                 break;
4621         }
4622
4623         tgt->irq_cmd_count--;
4624 }
4625
4626 /* ha->hardware_lock supposed to be held on entry */
4627 /* called via callback from qla2xxx */
4628 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4629 {
4630         struct qla_hw_data *ha = vha->hw;
4631         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4632
4633         if (unlikely(tgt == NULL)) {
4634                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4635                     "qla_target(%d): Response pkt %x received, but no "
4636                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4637                 return;
4638         }
4639
4640         /*
4641          * In tgt_stop mode we also should allow all requests to pass.
4642          * Otherwise, some commands can stuck.
4643          */
4644
4645         tgt->irq_cmd_count++;
4646
4647         switch (pkt->entry_type) {
4648         case CTIO_CRC2:
4649         case CTIO_TYPE7:
4650         {
4651                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4652                 qlt_do_ctio_completion(vha, entry->handle,
4653                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4654                     entry);
4655                 break;
4656         }
4657
4658         case ACCEPT_TGT_IO_TYPE:
4659         {
4660                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4661                 int rc;
4662                 if (atio->u.isp2x.status !=
4663                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4664                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4665                             "qla_target(%d): ATIO with error "
4666                             "status %x received\n", vha->vp_idx,
4667                             le16_to_cpu(atio->u.isp2x.status));
4668                         break;
4669                 }
4670
4671                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4672                 if (rc != 0) {
4673                         tgt->irq_cmd_count--;
4674                         return;
4675                 }
4676
4677                 rc = qlt_handle_cmd_for_atio(vha, atio);
4678                 if (unlikely(rc != 0)) {
4679                         if (rc == -ESRCH) {
4680 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4681                                 qlt_send_busy(vha, atio, 0);
4682 #else
4683                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4684 #endif
4685                         } else {
4686                                 if (tgt->tgt_stop) {
4687                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4688                                             "qla_target: Unable to send "
4689                                             "command to target, sending TERM "
4690                                             "EXCHANGE for rsp\n");
4691                                         qlt_send_term_exchange(vha, NULL,
4692                                             atio, 1);
4693                                 } else {
4694                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4695                                             "qla_target(%d): Unable to send "
4696                                             "command to target, sending BUSY "
4697                                             "status\n", vha->vp_idx);
4698                                         qlt_send_busy(vha, atio, 0);
4699                                 }
4700                         }
4701                 }
4702         }
4703         break;
4704
4705         case CONTINUE_TGT_IO_TYPE:
4706         {
4707                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4708                 qlt_do_ctio_completion(vha, entry->handle,
4709                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4710                     entry);
4711                 break;
4712         }
4713
4714         case CTIO_A64_TYPE:
4715         {
4716                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4717                 qlt_do_ctio_completion(vha, entry->handle,
4718                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4719                     entry);
4720                 break;
4721         }
4722
4723         case IMMED_NOTIFY_TYPE:
4724                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4725                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4726                 break;
4727
4728         case NOTIFY_ACK_TYPE:
4729                 if (tgt->notify_ack_expected > 0) {
4730                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4731                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4732                             "NOTIFY_ACK seq %08x status %x\n",
4733                             le16_to_cpu(entry->u.isp2x.seq_id),
4734                             le16_to_cpu(entry->u.isp2x.status));
4735                         tgt->notify_ack_expected--;
4736                         if (entry->u.isp2x.status !=
4737                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4738                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4739                                     "qla_target(%d): NOTIFY_ACK "
4740                                     "failed %x\n", vha->vp_idx,
4741                                     le16_to_cpu(entry->u.isp2x.status));
4742                         }
4743                 } else {
4744                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4745                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4746                             vha->vp_idx);
4747                 }
4748                 break;
4749
4750         case ABTS_RECV_24XX:
4751                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4752                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4753                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4754                 break;
4755
4756         case ABTS_RESP_24XX:
4757                 if (tgt->abts_resp_expected > 0) {
4758                         struct abts_resp_from_24xx_fw *entry =
4759                                 (struct abts_resp_from_24xx_fw *)pkt;
4760                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4761                             "ABTS_RESP_24XX: compl_status %x\n",
4762                             entry->compl_status);
4763                         tgt->abts_resp_expected--;
4764                         if (le16_to_cpu(entry->compl_status) !=
4765                             ABTS_RESP_COMPL_SUCCESS) {
4766                                 if ((entry->error_subcode1 == 0x1E) &&
4767                                     (entry->error_subcode2 == 0)) {
4768                                         /*
4769                                          * We've got a race here: aborted
4770                                          * exchange not terminated, i.e.
4771                                          * response for the aborted command was
4772                                          * sent between the abort request was
4773                                          * received and processed.
4774                                          * Unfortunately, the firmware has a
4775                                          * silly requirement that all aborted
4776                                          * exchanges must be explicitely
4777                                          * terminated, otherwise it refuses to
4778                                          * send responses for the abort
4779                                          * requests. So, we have to
4780                                          * (re)terminate the exchange and retry
4781                                          * the abort response.
4782                                          */
4783                                         qlt_24xx_retry_term_exchange(vha,
4784                                             entry);
4785                                 } else
4786                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4787                                             "qla_target(%d): ABTS_RESP_24XX "
4788                                             "failed %x (subcode %x:%x)",
4789                                             vha->vp_idx, entry->compl_status,
4790                                             entry->error_subcode1,
4791                                             entry->error_subcode2);
4792                         }
4793                 } else {
4794                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4795                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4796                             "received\n", vha->vp_idx);
4797                 }
4798                 break;
4799
4800         default:
4801                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4802                     "qla_target(%d): Received unknown response pkt "
4803                     "type %x\n", vha->vp_idx, pkt->entry_type);
4804                 break;
4805         }
4806
4807         tgt->irq_cmd_count--;
4808 }
4809
4810 /*
4811  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4812  */
4813 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4814         uint16_t *mailbox)
4815 {
4816         struct qla_hw_data *ha = vha->hw;
4817         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4818         int login_code;
4819
4820         if (!ha->tgt.tgt_ops)
4821                 return;
4822
4823         if (unlikely(tgt == NULL)) {
4824                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4825                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4826                 return;
4827         }
4828
4829         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4830             IS_QLA2100(ha))
4831                 return;
4832         /*
4833          * In tgt_stop mode we also should allow all requests to pass.
4834          * Otherwise, some commands can stuck.
4835          */
4836
4837         tgt->irq_cmd_count++;
4838
4839         switch (code) {
4840         case MBA_RESET:                 /* Reset */
4841         case MBA_SYSTEM_ERR:            /* System Error */
4842         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4843         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4844                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4845                     "qla_target(%d): System error async event %#x "
4846                     "occurred", vha->vp_idx, code);
4847                 break;
4848         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4849                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4850                 break;
4851
4852         case MBA_LOOP_UP:
4853         {
4854                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4855                     "qla_target(%d): Async LOOP_UP occurred "
4856                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4857                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4858                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4859                 if (tgt->link_reinit_iocb_pending) {
4860                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4861                             0, 0, 0, 0, 0, 0);
4862                         tgt->link_reinit_iocb_pending = 0;
4863                 }
4864                 break;
4865         }
4866
4867         case MBA_LIP_OCCURRED:
4868         case MBA_LOOP_DOWN:
4869         case MBA_LIP_RESET:
4870         case MBA_RSCN_UPDATE:
4871                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4872                     "qla_target(%d): Async event %#x occurred "
4873                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4874                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4875                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4876                 break;
4877
4878         case MBA_PORT_UPDATE:
4879                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4880                     "qla_target(%d): Port update async event %#x "
4881                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4882                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4883                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4884                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4885
4886                 login_code = le16_to_cpu(mailbox[2]);
4887                 if (login_code == 0x4)
4888                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4889                             "Async MB 2: Got PLOGI Complete\n");
4890                 else if (login_code == 0x7)
4891                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4892                             "Async MB 2: Port Logged Out\n");
4893                 break;
4894
4895         default:
4896                 break;
4897         }
4898
4899         tgt->irq_cmd_count--;
4900 }
4901
4902 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4903         uint16_t loop_id)
4904 {
4905         fc_port_t *fcport;
4906         int rc;
4907
4908         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4909         if (!fcport) {
4910                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4911                     "qla_target(%d): Allocation of tmp FC port failed",
4912                     vha->vp_idx);
4913                 return NULL;
4914         }
4915
4916         fcport->loop_id = loop_id;
4917
4918         rc = qla2x00_get_port_database(vha, fcport, 0);
4919         if (rc != QLA_SUCCESS) {
4920                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4921                     "qla_target(%d): Failed to retrieve fcport "
4922                     "information -- get_port_database() returned %x "
4923                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4924                 kfree(fcport);
4925                 return NULL;
4926         }
4927
4928         return fcport;
4929 }
4930
4931 /* Must be called under tgt_mutex */
4932 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4933         uint8_t *s_id)
4934 {
4935         struct qla_tgt_sess *sess = NULL;
4936         fc_port_t *fcport = NULL;
4937         int rc, global_resets;
4938         uint16_t loop_id = 0;
4939
4940 retry:
4941         global_resets =
4942             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4943
4944         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4945         if (rc != 0) {
4946                 if ((s_id[0] == 0xFF) &&
4947                     (s_id[1] == 0xFC)) {
4948                         /*
4949                          * This is Domain Controller, so it should be
4950                          * OK to drop SCSI commands from it.
4951                          */
4952                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4953                             "Unable to find initiator with S_ID %x:%x:%x",
4954                             s_id[0], s_id[1], s_id[2]);
4955                 } else
4956                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4957                             "qla_target(%d): Unable to find "
4958                             "initiator with S_ID %x:%x:%x",
4959                             vha->vp_idx, s_id[0], s_id[1],
4960                             s_id[2]);
4961                 return NULL;
4962         }
4963
4964         fcport = qlt_get_port_database(vha, loop_id);
4965         if (!fcport)
4966                 return NULL;
4967
4968         if (global_resets !=
4969             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4970                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4971                     "qla_target(%d): global reset during session discovery "
4972                     "(counter was %d, new %d), retrying", vha->vp_idx,
4973                     global_resets,
4974                     atomic_read(&vha->vha_tgt.
4975                         qla_tgt->tgt_global_resets_count));
4976                 goto retry;
4977         }
4978
4979         sess = qlt_create_sess(vha, fcport, true);
4980
4981         kfree(fcport);
4982         return sess;
4983 }
4984
4985 static void qlt_abort_work(struct qla_tgt *tgt,
4986         struct qla_tgt_sess_work_param *prm)
4987 {
4988         struct scsi_qla_host *vha = tgt->vha;
4989         struct qla_hw_data *ha = vha->hw;
4990         struct qla_tgt_sess *sess = NULL;
4991         unsigned long flags;
4992         uint32_t be_s_id;
4993         uint8_t s_id[3];
4994         int rc;
4995
4996         spin_lock_irqsave(&ha->hardware_lock, flags);
4997
4998         if (tgt->tgt_stop)
4999                 goto out_term;
5000
5001         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5002         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5003         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5004
5005         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5006             (unsigned char *)&be_s_id);
5007         if (!sess) {
5008                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5009
5010                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5011                 sess = qlt_make_local_sess(vha, s_id);
5012                 /* sess has got an extra creation ref */
5013                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5014
5015                 spin_lock_irqsave(&ha->hardware_lock, flags);
5016                 if (!sess)
5017                         goto out_term;
5018         } else {
5019                 kref_get(&sess->se_sess->sess_kref);
5020         }
5021
5022         if (tgt->tgt_stop)
5023                 goto out_term;
5024
5025         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5026         if (rc != 0)
5027                 goto out_term;
5028
5029         ha->tgt.tgt_ops->put_sess(sess);
5030         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5031         return;
5032
5033 out_term:
5034         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5035         if (sess)
5036                 ha->tgt.tgt_ops->put_sess(sess);
5037         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5038 }
5039
5040 static void qlt_tmr_work(struct qla_tgt *tgt,
5041         struct qla_tgt_sess_work_param *prm)
5042 {
5043         struct atio_from_isp *a = &prm->tm_iocb2;
5044         struct scsi_qla_host *vha = tgt->vha;
5045         struct qla_hw_data *ha = vha->hw;
5046         struct qla_tgt_sess *sess = NULL;
5047         unsigned long flags;
5048         uint8_t *s_id = NULL; /* to hide compiler warnings */
5049         int rc;
5050         uint32_t lun, unpacked_lun;
5051         int lun_size, fn;
5052         void *iocb;
5053
5054         spin_lock_irqsave(&ha->hardware_lock, flags);
5055
5056         if (tgt->tgt_stop)
5057                 goto out_term;
5058
5059         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5060         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5061         if (!sess) {
5062                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5063
5064                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5065                 sess = qlt_make_local_sess(vha, s_id);
5066                 /* sess has got an extra creation ref */
5067                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5068
5069                 spin_lock_irqsave(&ha->hardware_lock, flags);
5070                 if (!sess)
5071                         goto out_term;
5072         } else {
5073                 kref_get(&sess->se_sess->sess_kref);
5074         }
5075
5076         iocb = a;
5077         lun = a->u.isp24.fcp_cmnd.lun;
5078         lun_size = sizeof(lun);
5079         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5080         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5081
5082         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5083         if (rc != 0)
5084                 goto out_term;
5085
5086         ha->tgt.tgt_ops->put_sess(sess);
5087         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5088         return;
5089
5090 out_term:
5091         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5092         if (sess)
5093                 ha->tgt.tgt_ops->put_sess(sess);
5094         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5095 }
5096
5097 static void qlt_sess_work_fn(struct work_struct *work)
5098 {
5099         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5100         struct scsi_qla_host *vha = tgt->vha;
5101         unsigned long flags;
5102
5103         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5104
5105         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5106         while (!list_empty(&tgt->sess_works_list)) {
5107                 struct qla_tgt_sess_work_param *prm = list_entry(
5108                     tgt->sess_works_list.next, typeof(*prm),
5109                     sess_works_list_entry);
5110
5111                 /*
5112                  * This work can be scheduled on several CPUs at time, so we
5113                  * must delete the entry to eliminate double processing
5114                  */
5115                 list_del(&prm->sess_works_list_entry);
5116
5117                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5118
5119                 switch (prm->type) {
5120                 case QLA_TGT_SESS_WORK_ABORT:
5121                         qlt_abort_work(tgt, prm);
5122                         break;
5123                 case QLA_TGT_SESS_WORK_TM:
5124                         qlt_tmr_work(tgt, prm);
5125                         break;
5126                 default:
5127                         BUG_ON(1);
5128                         break;
5129                 }
5130
5131                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5132
5133                 kfree(prm);
5134         }
5135         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5136 }
5137
5138 /* Must be called under tgt_host_action_mutex */
5139 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5140 {
5141         struct qla_tgt *tgt;
5142
5143         if (!QLA_TGT_MODE_ENABLED())
5144                 return 0;
5145
5146         if (!IS_TGT_MODE_CAPABLE(ha)) {
5147                 ql_log(ql_log_warn, base_vha, 0xe070,
5148                     "This adapter does not support target mode.\n");
5149                 return 0;
5150         }
5151
5152         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5153             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5154
5155         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5156
5157         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5158         if (!tgt) {
5159                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5160                     "Unable to allocate struct qla_tgt\n");
5161                 return -ENOMEM;
5162         }
5163
5164         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5165                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5166
5167         tgt->ha = ha;
5168         tgt->vha = base_vha;
5169         init_waitqueue_head(&tgt->waitQ);
5170         INIT_LIST_HEAD(&tgt->sess_list);
5171         INIT_LIST_HEAD(&tgt->del_sess_list);
5172         INIT_DELAYED_WORK(&tgt->sess_del_work,
5173                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5174         spin_lock_init(&tgt->sess_work_lock);
5175         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5176         INIT_LIST_HEAD(&tgt->sess_works_list);
5177         spin_lock_init(&tgt->srr_lock);
5178         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5179         INIT_LIST_HEAD(&tgt->srr_imm_list);
5180         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5181         atomic_set(&tgt->tgt_global_resets_count, 0);
5182
5183         base_vha->vha_tgt.qla_tgt = tgt;
5184
5185         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5186                 "qla_target(%d): using 64 Bit PCI addressing",
5187                 base_vha->vp_idx);
5188         tgt->tgt_enable_64bit_addr = 1;
5189         /* 3 is reserved */
5190         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5191         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5192         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5193
5194         if (base_vha->fc_vport)
5195                 return 0;
5196
5197         mutex_lock(&qla_tgt_mutex);
5198         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5199         mutex_unlock(&qla_tgt_mutex);
5200
5201         return 0;
5202 }
5203
5204 /* Must be called under tgt_host_action_mutex */
5205 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5206 {
5207         if (!vha->vha_tgt.qla_tgt)
5208                 return 0;
5209
5210         if (vha->fc_vport) {
5211                 qlt_release(vha->vha_tgt.qla_tgt);
5212                 return 0;
5213         }
5214
5215         /* free left over qfull cmds */
5216         qlt_init_term_exchange(vha);
5217
5218         mutex_lock(&qla_tgt_mutex);
5219         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5220         mutex_unlock(&qla_tgt_mutex);
5221
5222         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5223             vha->host_no, ha);
5224         qlt_release(vha->vha_tgt.qla_tgt);
5225
5226         return 0;
5227 }
5228
5229 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5230         unsigned char *b)
5231 {
5232         int i;
5233
5234         pr_debug("qla2xxx HW vha->node_name: ");
5235         for (i = 0; i < WWN_SIZE; i++)
5236                 pr_debug("%02x ", vha->node_name[i]);
5237         pr_debug("\n");
5238         pr_debug("qla2xxx HW vha->port_name: ");
5239         for (i = 0; i < WWN_SIZE; i++)
5240                 pr_debug("%02x ", vha->port_name[i]);
5241         pr_debug("\n");
5242
5243         pr_debug("qla2xxx passed configfs WWPN: ");
5244         put_unaligned_be64(wwpn, b);
5245         for (i = 0; i < WWN_SIZE; i++)
5246                 pr_debug("%02x ", b[i]);
5247         pr_debug("\n");
5248 }
5249
5250 /**
5251  * qla_tgt_lport_register - register lport with external module
5252  *
5253  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5254  * @wwpn: Passwd FC target WWPN
5255  * @callback:  lport initialization callback for tcm_qla2xxx code
5256  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5257  */
5258 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5259                        u64 npiv_wwpn, u64 npiv_wwnn,
5260                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5261 {
5262         struct qla_tgt *tgt;
5263         struct scsi_qla_host *vha;
5264         struct qla_hw_data *ha;
5265         struct Scsi_Host *host;
5266         unsigned long flags;
5267         int rc;
5268         u8 b[WWN_SIZE];
5269
5270         mutex_lock(&qla_tgt_mutex);
5271         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5272                 vha = tgt->vha;
5273                 ha = vha->hw;
5274
5275                 host = vha->host;
5276                 if (!host)
5277                         continue;
5278
5279                 if (!(host->hostt->supported_mode & MODE_TARGET))
5280                         continue;
5281
5282                 spin_lock_irqsave(&ha->hardware_lock, flags);
5283                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5284                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5285                             host->host_no);
5286                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5287                         continue;
5288                 }
5289                 if (tgt->tgt_stop) {
5290                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5291                                  host->host_no);
5292                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5293                         continue;
5294                 }
5295                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5296
5297                 if (!scsi_host_get(host)) {
5298                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5299                             "Unable to scsi_host_get() for"
5300                             " qla2xxx scsi_host\n");
5301                         continue;
5302                 }
5303                 qlt_lport_dump(vha, phys_wwpn, b);
5304
5305                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5306                         scsi_host_put(host);
5307                         continue;
5308                 }
5309                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5310                 if (rc != 0)
5311                         scsi_host_put(host);
5312
5313                 mutex_unlock(&qla_tgt_mutex);
5314                 return rc;
5315         }
5316         mutex_unlock(&qla_tgt_mutex);
5317
5318         return -ENODEV;
5319 }
5320 EXPORT_SYMBOL(qlt_lport_register);
5321
5322 /**
5323  * qla_tgt_lport_deregister - Degister lport
5324  *
5325  * @vha:  Registered scsi_qla_host pointer
5326  */
5327 void qlt_lport_deregister(struct scsi_qla_host *vha)
5328 {
5329         struct qla_hw_data *ha = vha->hw;
5330         struct Scsi_Host *sh = vha->host;
5331         /*
5332          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5333          */
5334         vha->vha_tgt.target_lport_ptr = NULL;
5335         ha->tgt.tgt_ops = NULL;
5336         /*
5337          * Release the Scsi_Host reference for the underlying qla2xxx host
5338          */
5339         scsi_host_put(sh);
5340 }
5341 EXPORT_SYMBOL(qlt_lport_deregister);
5342
5343 /* Must be called under HW lock */
5344 static void qlt_set_mode(struct scsi_qla_host *vha)
5345 {
5346         struct qla_hw_data *ha = vha->hw;
5347
5348         switch (ql2x_ini_mode) {
5349         case QLA2XXX_INI_MODE_DISABLED:
5350         case QLA2XXX_INI_MODE_EXCLUSIVE:
5351                 vha->host->active_mode = MODE_TARGET;
5352                 break;
5353         case QLA2XXX_INI_MODE_ENABLED:
5354                 vha->host->active_mode |= MODE_TARGET;
5355                 break;
5356         default:
5357                 break;
5358         }
5359
5360         if (ha->tgt.ini_mode_force_reverse)
5361                 qla_reverse_ini_mode(vha);
5362 }
5363
5364 /* Must be called under HW lock */
5365 static void qlt_clear_mode(struct scsi_qla_host *vha)
5366 {
5367         struct qla_hw_data *ha = vha->hw;
5368
5369         switch (ql2x_ini_mode) {
5370         case QLA2XXX_INI_MODE_DISABLED:
5371                 vha->host->active_mode = MODE_UNKNOWN;
5372                 break;
5373         case QLA2XXX_INI_MODE_EXCLUSIVE:
5374                 vha->host->active_mode = MODE_INITIATOR;
5375                 break;
5376         case QLA2XXX_INI_MODE_ENABLED:
5377                 vha->host->active_mode &= ~MODE_TARGET;
5378                 break;
5379         default:
5380                 break;
5381         }
5382
5383         if (ha->tgt.ini_mode_force_reverse)
5384                 qla_reverse_ini_mode(vha);
5385 }
5386
5387 /*
5388  * qla_tgt_enable_vha - NO LOCK HELD
5389  *
5390  * host_reset, bring up w/ Target Mode Enabled
5391  */
5392 void
5393 qlt_enable_vha(struct scsi_qla_host *vha)
5394 {
5395         struct qla_hw_data *ha = vha->hw;
5396         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5397         unsigned long flags;
5398         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5399
5400         if (!tgt) {
5401                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5402                     "Unable to locate qla_tgt pointer from"
5403                     " struct qla_hw_data\n");
5404                 dump_stack();
5405                 return;
5406         }
5407
5408         spin_lock_irqsave(&ha->hardware_lock, flags);
5409         tgt->tgt_stopped = 0;
5410         qlt_set_mode(vha);
5411         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5412
5413         if (vha->vp_idx) {
5414                 qla24xx_disable_vp(vha);
5415                 qla24xx_enable_vp(vha);
5416         } else {
5417                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5418                 qla2xxx_wake_dpc(base_vha);
5419                 qla2x00_wait_for_hba_online(base_vha);
5420         }
5421 }
5422 EXPORT_SYMBOL(qlt_enable_vha);
5423
5424 /*
5425  * qla_tgt_disable_vha - NO LOCK HELD
5426  *
5427  * Disable Target Mode and reset the adapter
5428  */
5429 static void qlt_disable_vha(struct scsi_qla_host *vha)
5430 {
5431         struct qla_hw_data *ha = vha->hw;
5432         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5433         unsigned long flags;
5434
5435         if (!tgt) {
5436                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5437                     "Unable to locate qla_tgt pointer from"
5438                     " struct qla_hw_data\n");
5439                 dump_stack();
5440                 return;
5441         }
5442
5443         spin_lock_irqsave(&ha->hardware_lock, flags);
5444         qlt_clear_mode(vha);
5445         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5446
5447         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5448         qla2xxx_wake_dpc(vha);
5449         qla2x00_wait_for_hba_online(vha);
5450 }
5451
5452 /*
5453  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5454  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5455  * members.
5456  */
5457 void
5458 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5459 {
5460         if (!qla_tgt_mode_enabled(vha))
5461                 return;
5462
5463         vha->vha_tgt.qla_tgt = NULL;
5464
5465         mutex_init(&vha->vha_tgt.tgt_mutex);
5466         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5467
5468         qlt_clear_mode(vha);
5469
5470         /*
5471          * NOTE: Currently the value is kept the same for <24xx and
5472          * >=24xx ISPs. If it is necessary to change it,
5473          * the check should be added for specific ISPs,
5474          * assigning the value appropriately.
5475          */
5476         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5477
5478         qlt_add_target(ha, vha);
5479 }
5480
5481 void
5482 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5483 {
5484         /*
5485          * FC-4 Feature bit 0 indicates target functionality to the name server.
5486          */
5487         if (qla_tgt_mode_enabled(vha)) {
5488                 if (qla_ini_mode_enabled(vha))
5489                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5490                 else
5491                         ct_req->req.rff_id.fc4_feature = BIT_0;
5492         } else if (qla_ini_mode_enabled(vha)) {
5493                 ct_req->req.rff_id.fc4_feature = BIT_1;
5494         }
5495 }
5496
5497 /*
5498  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5499  * @ha: HA context
5500  *
5501  * Beginning of ATIO ring has initialization control block already built
5502  * by nvram config routine.
5503  *
5504  * Returns 0 on success.
5505  */
5506 void
5507 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5508 {
5509         struct qla_hw_data *ha = vha->hw;
5510         uint16_t cnt;
5511         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5512
5513         if (!qla_tgt_mode_enabled(vha))
5514                 return;
5515
5516         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5517                 pkt->u.raw.signature = ATIO_PROCESSED;
5518                 pkt++;
5519         }
5520
5521 }
5522
5523 /*
5524  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5525  * @ha: SCSI driver HA context
5526  */
5527 void
5528 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5529 {
5530         struct qla_hw_data *ha = vha->hw;
5531         struct atio_from_isp *pkt;
5532         int cnt, i;
5533
5534         if (!vha->flags.online)
5535                 return;
5536
5537         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5538                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5539                 cnt = pkt->u.raw.entry_count;
5540
5541                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5542
5543                 for (i = 0; i < cnt; i++) {
5544                         ha->tgt.atio_ring_index++;
5545                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5546                                 ha->tgt.atio_ring_index = 0;
5547                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5548                         } else
5549                                 ha->tgt.atio_ring_ptr++;
5550
5551                         pkt->u.raw.signature = ATIO_PROCESSED;
5552                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5553                 }
5554                 wmb();
5555         }
5556
5557         /* Adjust ring index */
5558         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5559 }
5560
5561 void
5562 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5563 {
5564         struct qla_hw_data *ha = vha->hw;
5565         if (!QLA_TGT_MODE_ENABLED())
5566                 return;
5567
5568         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5569         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5570         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5571
5572         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5573                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5574                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5575
5576                 icb->msix_atio = cpu_to_le16(msix->entry);
5577                 ql_dbg(ql_dbg_init, vha, 0xf072,
5578                     "Registering ICB vector 0x%x for atio que.\n",
5579                     msix->entry);
5580         }
5581 }
5582
5583 void
5584 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5585 {
5586         struct qla_hw_data *ha = vha->hw;
5587
5588         if (qla_tgt_mode_enabled(vha)) {
5589                 if (!ha->tgt.saved_set) {
5590                         /* We save only once */
5591                         ha->tgt.saved_exchange_count = nv->exchange_count;
5592                         ha->tgt.saved_firmware_options_1 =
5593                             nv->firmware_options_1;
5594                         ha->tgt.saved_firmware_options_2 =
5595                             nv->firmware_options_2;
5596                         ha->tgt.saved_firmware_options_3 =
5597                             nv->firmware_options_3;
5598                         ha->tgt.saved_set = 1;
5599                 }
5600
5601                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5602
5603                 /* Enable target mode */
5604                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5605
5606                 /* Disable ini mode, if requested */
5607                 if (!qla_ini_mode_enabled(vha))
5608                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5609
5610                 /* Disable Full Login after LIP */
5611                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5612                 /* Enable initial LIP */
5613                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5614                 if (ql2xtgt_tape_enable)
5615                         /* Enable FC Tape support */
5616                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5617                 else
5618                         /* Disable FC Tape support */
5619                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5620
5621                 /* Disable Full Login after LIP */
5622                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5623                 /* Enable target PRLI control */
5624                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5625         } else {
5626                 if (ha->tgt.saved_set) {
5627                         nv->exchange_count = ha->tgt.saved_exchange_count;
5628                         nv->firmware_options_1 =
5629                             ha->tgt.saved_firmware_options_1;
5630                         nv->firmware_options_2 =
5631                             ha->tgt.saved_firmware_options_2;
5632                         nv->firmware_options_3 =
5633                             ha->tgt.saved_firmware_options_3;
5634                 }
5635                 return;
5636         }
5637
5638         /* out-of-order frames reassembly */
5639         nv->firmware_options_3 |= BIT_6|BIT_9;
5640
5641         if (ha->tgt.enable_class_2) {
5642                 if (vha->flags.init_done)
5643                         fc_host_supported_classes(vha->host) =
5644                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5645
5646                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5647         } else {
5648                 if (vha->flags.init_done)
5649                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5650
5651                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5652         }
5653 }
5654
5655 void
5656 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5657         struct init_cb_24xx *icb)
5658 {
5659         struct qla_hw_data *ha = vha->hw;
5660
5661         if (ha->tgt.node_name_set) {
5662                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5663                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5664         }
5665 }
5666
5667 void
5668 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5669 {
5670         struct qla_hw_data *ha = vha->hw;
5671
5672         if (!QLA_TGT_MODE_ENABLED())
5673                 return;
5674
5675         if (qla_tgt_mode_enabled(vha)) {
5676                 if (!ha->tgt.saved_set) {
5677                         /* We save only once */
5678                         ha->tgt.saved_exchange_count = nv->exchange_count;
5679                         ha->tgt.saved_firmware_options_1 =
5680                             nv->firmware_options_1;
5681                         ha->tgt.saved_firmware_options_2 =
5682                             nv->firmware_options_2;
5683                         ha->tgt.saved_firmware_options_3 =
5684                             nv->firmware_options_3;
5685                         ha->tgt.saved_set = 1;
5686                 }
5687
5688                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5689
5690                 /* Enable target mode */
5691                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5692
5693                 /* Disable ini mode, if requested */
5694                 if (!qla_ini_mode_enabled(vha))
5695                         nv->firmware_options_1 |=
5696                             __constant_cpu_to_le32(BIT_5);
5697
5698                 /* Disable Full Login after LIP */
5699                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5700                 /* Enable initial LIP */
5701                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5702                 if (ql2xtgt_tape_enable)
5703                         /* Enable FC tape support */
5704                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5705                 else
5706                         /* Disable FC tape support */
5707                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5708
5709                 /* Disable Full Login after LIP */
5710                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5711                 /* Enable target PRLI control */
5712                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5713         } else {
5714                 if (ha->tgt.saved_set) {
5715                         nv->exchange_count = ha->tgt.saved_exchange_count;
5716                         nv->firmware_options_1 =
5717                             ha->tgt.saved_firmware_options_1;
5718                         nv->firmware_options_2 =
5719                             ha->tgt.saved_firmware_options_2;
5720                         nv->firmware_options_3 =
5721                             ha->tgt.saved_firmware_options_3;
5722                 }
5723                 return;
5724         }
5725
5726         /* out-of-order frames reassembly */
5727         nv->firmware_options_3 |= BIT_6|BIT_9;
5728
5729         if (ha->tgt.enable_class_2) {
5730                 if (vha->flags.init_done)
5731                         fc_host_supported_classes(vha->host) =
5732                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5733
5734                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5735         } else {
5736                 if (vha->flags.init_done)
5737                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5738
5739                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5740         }
5741 }
5742
5743 void
5744 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5745         struct init_cb_81xx *icb)
5746 {
5747         struct qla_hw_data *ha = vha->hw;
5748
5749         if (!QLA_TGT_MODE_ENABLED())
5750                 return;
5751
5752         if (ha->tgt.node_name_set) {
5753                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5754                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5755         }
5756 }
5757
5758 void
5759 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5760 {
5761         if (!QLA_TGT_MODE_ENABLED())
5762                 return;
5763
5764         ha->msix_count += 1; /* For ATIO Q */
5765 }
5766
5767 int
5768 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5769         struct sts_entry_24xx *pkt)
5770 {
5771         switch (pkt->entry_type) {
5772         case ABTS_RECV_24XX:
5773         case ABTS_RESP_24XX:
5774         case CTIO_TYPE7:
5775         case NOTIFY_ACK_TYPE:
5776         case CTIO_CRC2:
5777                 return 1;
5778         default:
5779                 return 0;
5780         }
5781 }
5782
5783 void
5784 qlt_modify_vp_config(struct scsi_qla_host *vha,
5785         struct vp_config_entry_24xx *vpmod)
5786 {
5787         if (qla_tgt_mode_enabled(vha))
5788                 vpmod->options_idx1 &= ~BIT_5;
5789         /* Disable ini mode, if requested */
5790         if (!qla_ini_mode_enabled(vha))
5791                 vpmod->options_idx1 &= ~BIT_4;
5792 }
5793
5794 void
5795 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5796 {
5797         if (!QLA_TGT_MODE_ENABLED())
5798                 return;
5799
5800         if  (ha->mqenable || IS_QLA83XX(ha)) {
5801                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5802                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5803         } else {
5804                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5805                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5806         }
5807
5808         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5809         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5810         qlt_clear_mode(base_vha);
5811 }
5812
5813 irqreturn_t
5814 qla83xx_msix_atio_q(int irq, void *dev_id)
5815 {
5816         struct rsp_que *rsp;
5817         scsi_qla_host_t *vha;
5818         struct qla_hw_data *ha;
5819         unsigned long flags;
5820
5821         rsp = (struct rsp_que *) dev_id;
5822         ha = rsp->hw;
5823         vha = pci_get_drvdata(ha->pdev);
5824
5825         spin_lock_irqsave(&ha->hardware_lock, flags);
5826
5827         qlt_24xx_process_atio_queue(vha);
5828         qla24xx_process_response_queue(vha, rsp);
5829
5830         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5831
5832         return IRQ_HANDLED;
5833 }
5834
5835 int
5836 qlt_mem_alloc(struct qla_hw_data *ha)
5837 {
5838         if (!QLA_TGT_MODE_ENABLED())
5839                 return 0;
5840
5841         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5842             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5843         if (!ha->tgt.tgt_vp_map)
5844                 return -ENOMEM;
5845
5846         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5847             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5848             &ha->tgt.atio_dma, GFP_KERNEL);
5849         if (!ha->tgt.atio_ring) {
5850                 kfree(ha->tgt.tgt_vp_map);
5851                 return -ENOMEM;
5852         }
5853         return 0;
5854 }
5855
5856 void
5857 qlt_mem_free(struct qla_hw_data *ha)
5858 {
5859         if (!QLA_TGT_MODE_ENABLED())
5860                 return;
5861
5862         if (ha->tgt.atio_ring) {
5863                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5864                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5865                     ha->tgt.atio_dma);
5866         }
5867         kfree(ha->tgt.tgt_vp_map);
5868 }
5869
5870 /* vport_slock to be held by the caller */
5871 void
5872 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5873 {
5874         if (!QLA_TGT_MODE_ENABLED())
5875                 return;
5876
5877         switch (cmd) {
5878         case SET_VP_IDX:
5879                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5880                 break;
5881         case SET_AL_PA:
5882                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5883                 break;
5884         case RESET_VP_IDX:
5885                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5886                 break;
5887         case RESET_AL_PA:
5888                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5889                 break;
5890         }
5891 }
5892
5893 static int __init qlt_parse_ini_mode(void)
5894 {
5895         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5896                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5897         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5898                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5899         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5900                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5901         else
5902                 return false;
5903
5904         return true;
5905 }
5906
5907 int __init qlt_init(void)
5908 {
5909         int ret;
5910
5911         if (!qlt_parse_ini_mode()) {
5912                 ql_log(ql_log_fatal, NULL, 0xe06b,
5913                     "qlt_parse_ini_mode() failed\n");
5914                 return -EINVAL;
5915         }
5916
5917         if (!QLA_TGT_MODE_ENABLED())
5918                 return 0;
5919
5920         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5921             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5922             qla_tgt_mgmt_cmd), 0, NULL);
5923         if (!qla_tgt_mgmt_cmd_cachep) {
5924                 ql_log(ql_log_fatal, NULL, 0xe06d,
5925                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5926                 return -ENOMEM;
5927         }
5928
5929         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5930             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5931         if (!qla_tgt_mgmt_cmd_mempool) {
5932                 ql_log(ql_log_fatal, NULL, 0xe06e,
5933                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5934                 ret = -ENOMEM;
5935                 goto out_mgmt_cmd_cachep;
5936         }
5937
5938         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5939         if (!qla_tgt_wq) {
5940                 ql_log(ql_log_fatal, NULL, 0xe06f,
5941                     "alloc_workqueue for qla_tgt_wq failed\n");
5942                 ret = -ENOMEM;
5943                 goto out_cmd_mempool;
5944         }
5945         /*
5946          * Return 1 to signal that initiator-mode is being disabled
5947          */
5948         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5949
5950 out_cmd_mempool:
5951         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5952 out_mgmt_cmd_cachep:
5953         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5954         return ret;
5955 }
5956
5957 void qlt_exit(void)
5958 {
5959         if (!QLA_TGT_MODE_ENABLED())
5960                 return;
5961
5962         destroy_workqueue(qla_tgt_wq);
5963         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5964         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5965 }