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 char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 108 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 109 static struct workqueue_struct *qla_tgt_wq;
 110 static DEFINE_MUTEX(qla_tgt_mutex);
 111 static LIST_HEAD(qla_tgt_glist);
 112
 113 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 114 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 115         struct qla_tgt *tgt,
 116         const uint8_t *port_name)
 117 {
 118         struct qla_tgt_sess *sess;
 119
 120         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 121                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 122                         return sess;
 123         }
 124
 125         return NULL;
 126 }
 127
 128 /* Might release hw lock, then reaquire!! */
 129 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 130 {
 131         /* Send marker if required */
 132         if (unlikely(vha->marker_needed != 0)) {
 133                 int rc = qla2x00_issue_marker(vha, vha_locked);
 134                 if (rc != QLA_SUCCESS) {
 135                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 136                             "qla_target(%d): issue_marker() failed\n",
 137                             vha->vp_idx);
 138                 }
 139                 return rc;
 140         }
 141         return QLA_SUCCESS;
 142 }
 143
 144 static inline
 145 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 146         uint8_t *d_id)
 147 {
 148         struct qla_hw_data *ha = vha->hw;
 149         uint8_t vp_idx;
 150
 151         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 152                 return NULL;
 153
 154         if (vha->d_id.b.al_pa == d_id[2])
 155                 return vha;
 156
 157         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 158         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 159         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 160                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 161
 162         return NULL;
 163 }
 164
 165 static inline
 166 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 167         uint16_t vp_idx)
 168 {
 169         struct qla_hw_data *ha = vha->hw;
 170
 171         if (vha->vp_idx == vp_idx)
 172                 return vha;
 173
 174         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 175         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 176                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 177
 178         return NULL;
 179 }
 180
 181 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 182         struct atio_from_isp *atio)
 183 {
 184         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 185                 "%s: qla_target(%d): type %x ox_id %04x\n",
 186                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 187                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 188
 189         switch (atio->u.raw.entry_type) {
 190         case ATIO_TYPE7:
 191         {
 192                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 193                     atio->u.isp24.fcp_hdr.d_id);
 194                 if (unlikely(NULL == host)) {
 195                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 196                             "qla_target(%d): Received ATIO_TYPE7 "
 197                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 198                             atio->u.isp24.fcp_hdr.d_id[0],
 199                             atio->u.isp24.fcp_hdr.d_id[1],
 200                             atio->u.isp24.fcp_hdr.d_id[2]);
 201                         break;
 202                 }
 203                 qlt_24xx_atio_pkt(host, atio);
 204                 break;
 205         }
 206
 207         case IMMED_NOTIFY_TYPE:
 208         {
 209                 struct scsi_qla_host *host = vha;
 210                 struct imm_ntfy_from_isp *entry =
 211                     (struct imm_ntfy_from_isp *)atio;
 212
 213                 if ((entry->u.isp24.vp_index != 0xFF) &&
 214                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 215                         host = qlt_find_host_by_vp_idx(vha,
 216                             entry->u.isp24.vp_index);
 217                         if (unlikely(!host)) {
 218                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 219                                     "qla_target(%d): Received "
 220                                     "ATIO (IMMED_NOTIFY_TYPE) "
 221                                     "with unknown vp_index %d\n",
 222                                     vha->vp_idx, entry->u.isp24.vp_index);
 223                                 break;
 224                         }
 225                 }
 226                 qlt_24xx_atio_pkt(host, atio);
 227                 break;
 228         }
 229
 230         default:
 231                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 232                     "qla_target(%d): Received unknown ATIO atio "
 233                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 234                 break;
 235         }
 236
 237         return;
 238 }
 239
 240 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 241 {
 242         switch (pkt->entry_type) {
 243         case CTIO_CRC2:
 244                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 245                         "qla_target(%d):%s: CRC2 Response pkt\n",
 246                         vha->vp_idx, __func__);
 247         case CTIO_TYPE7:
 248         {
 249                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 250                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 251                     entry->vp_index);
 252                 if (unlikely(!host)) {
 253                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 254                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 255                             "received, with unknown vp_index %d\n",
 256                             vha->vp_idx, entry->vp_index);
 257                         break;
 258                 }
 259                 qlt_response_pkt(host, pkt);
 260                 break;
 261         }
 262
 263         case IMMED_NOTIFY_TYPE:
 264         {
 265                 struct scsi_qla_host *host = vha;
 266                 struct imm_ntfy_from_isp *entry =
 267                     (struct imm_ntfy_from_isp *)pkt;
 268
 269                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 270                 if (unlikely(!host)) {
 271                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 272                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 273                             "received, with unknown vp_index %d\n",
 274                             vha->vp_idx, entry->u.isp24.vp_index);
 275                         break;
 276                 }
 277                 qlt_response_pkt(host, pkt);
 278                 break;
 279         }
 280
 281         case NOTIFY_ACK_TYPE:
 282         {
 283                 struct scsi_qla_host *host = vha;
 284                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 285
 286                 if (0xFF != entry->u.isp24.vp_index) {
 287                         host = qlt_find_host_by_vp_idx(vha,
 288                             entry->u.isp24.vp_index);
 289                         if (unlikely(!host)) {
 290                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 291                                     "qla_target(%d): Response "
 292                                     "pkt (NOTIFY_ACK_TYPE) "
 293                                     "received, with unknown "
 294                                     "vp_index %d\n", vha->vp_idx,
 295                                     entry->u.isp24.vp_index);
 296                                 break;
 297                         }
 298                 }
 299                 qlt_response_pkt(host, pkt);
 300                 break;
 301         }
 302
 303         case ABTS_RECV_24XX:
 304         {
 305                 struct abts_recv_from_24xx *entry =
 306                     (struct abts_recv_from_24xx *)pkt;
 307                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 308                     entry->vp_index);
 309                 if (unlikely(!host)) {
 310                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 311                             "qla_target(%d): Response pkt "
 312                             "(ABTS_RECV_24XX) received, with unknown "
 313                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 314                         break;
 315                 }
 316                 qlt_response_pkt(host, pkt);
 317                 break;
 318         }
 319
 320         case ABTS_RESP_24XX:
 321         {
 322                 struct abts_resp_to_24xx *entry =
 323                     (struct abts_resp_to_24xx *)pkt;
 324                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 325                     entry->vp_index);
 326                 if (unlikely(!host)) {
 327                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 328                             "qla_target(%d): Response pkt "
 329                             "(ABTS_RECV_24XX) received, with unknown "
 330                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 331                         break;
 332                 }
 333                 qlt_response_pkt(host, pkt);
 334                 break;
 335         }
 336
 337         default:
 338                 qlt_response_pkt(vha, pkt);
 339                 break;
 340         }
 341
 342 }
 343
 344 static void qlt_free_session_done(struct work_struct *work)
 345 {
 346         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 347             free_work);
 348         struct qla_tgt *tgt = sess->tgt;
 349         struct scsi_qla_host *vha = sess->vha;
 350         struct qla_hw_data *ha = vha->hw;
 351
 352         BUG_ON(!tgt);
 353         /*
 354          * Release the target session for FC Nexus from fabric module code.
 355          */
 356         if (sess->se_sess != NULL)
 357                 ha->tgt.tgt_ops->free_session(sess);
 358
 359         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 360             "Unregistration of sess %p finished\n", sess);
 361
 362         kfree(sess);
 363         /*
 364          * We need to protect against race, when tgt is freed before or
 365          * inside wake_up()
 366          */
 367         tgt->sess_count--;
 368         if (tgt->sess_count == 0)
 369                 wake_up_all(&tgt->waitQ);
 370 }
 371
 372 /* ha->hardware_lock supposed to be held on entry */
 373 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 374 {
 375         struct scsi_qla_host *vha = sess->vha;
 376
 377         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 378
 379         list_del(&sess->sess_list_entry);
 380         if (sess->deleted)
 381                 list_del(&sess->del_list_entry);
 382
 383         INIT_WORK(&sess->free_work, qlt_free_session_done);
 384         schedule_work(&sess->free_work);
 385 }
 386 EXPORT_SYMBOL(qlt_unreg_sess);
 387
 388 /* ha->hardware_lock supposed to be held on entry */
 389 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 390 {
 391         struct qla_hw_data *ha = vha->hw;
 392         struct qla_tgt_sess *sess = NULL;
 393         uint32_t unpacked_lun, lun = 0;
 394         uint16_t loop_id;
 395         int res = 0;
 396         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 397         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 398
 399         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 400         if (loop_id == 0xFFFF) {
 401 #if 0 /* FIXME: Re-enable Global event handling.. */
 402                 /* Global event */
 403                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 404                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 405                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 406                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 407                             typeof(*sess), sess_list_entry);
 408                         switch (mcmd) {
 409                         case QLA_TGT_NEXUS_LOSS_SESS:
 410                                 mcmd = QLA_TGT_NEXUS_LOSS;
 411                                 break;
 412                         case QLA_TGT_ABORT_ALL_SESS:
 413                                 mcmd = QLA_TGT_ABORT_ALL;
 414                                 break;
 415                         case QLA_TGT_NEXUS_LOSS:
 416                         case QLA_TGT_ABORT_ALL:
 417                                 break;
 418                         default:
 419                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 420                                     "qla_target(%d): Not allowed "
 421                                     "command %x in %s", vha->vp_idx,
 422                                     mcmd, __func__);
 423                                 sess = NULL;
 424                                 break;
 425                         }
 426                 } else
 427                         sess = NULL;
 428 #endif
 429         } else {
 430                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 431         }
 432
 433         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 434             "Using sess for qla_tgt_reset: %p\n", sess);
 435         if (!sess) {
 436                 res = -ESRCH;
 437                 return res;
 438         }
 439
 440         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 441             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 442             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 443             mcmd, loop_id);
 444
 445         lun = a->u.isp24.fcp_cmnd.lun;
 446         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 447
 448         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 449             iocb, QLA24XX_MGMT_SEND_NACK);
 450 }
 451
 452 /* ha->hardware_lock supposed to be held on entry */
 453 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 454         bool immediate)
 455 {
 456         struct qla_tgt *tgt = sess->tgt;
 457         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 458
 459         if (sess->deleted)
 460                 return;
 461
 462         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 463             "Scheduling sess %p for deletion\n", sess);
 464         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 465         sess->deleted = 1;
 466
 467         if (immediate)
 468                 dev_loss_tmo = 0;
 469
 470         sess->expires = jiffies + dev_loss_tmo * HZ;
 471
 472         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 473             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 474             "deletion in %u secs (expires: %lu) immed: %d\n",
 475             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 476             sess->expires, immediate);
 477
 478         if (immediate)
 479                 schedule_delayed_work(&tgt->sess_del_work, 0);
 480         else
 481                 schedule_delayed_work(&tgt->sess_del_work,
 482                     sess->expires - jiffies);
 483 }
 484
 485 /* ha->hardware_lock supposed to be held on entry */
 486 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 487 {
 488         struct qla_tgt_sess *sess;
 489
 490         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 491                 qlt_schedule_sess_for_deletion(sess, true);
 492
 493         /* At this point tgt could be already dead */
 494 }
 495
 496 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 497         uint16_t *loop_id)
 498 {
 499         struct qla_hw_data *ha = vha->hw;
 500         dma_addr_t gid_list_dma;
 501         struct gid_list_info *gid_list;
 502         char *id_iter;
 503         int res, rc, i;
 504         uint16_t entries;
 505
 506         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 507             &gid_list_dma, GFP_KERNEL);
 508         if (!gid_list) {
 509                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 510                     "qla_target(%d): DMA Alloc failed of %u\n",
 511                     vha->vp_idx, qla2x00_gid_list_size(ha));
 512                 return -ENOMEM;
 513         }
 514
 515         /* Get list of logged in devices */
 516         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 517         if (rc != QLA_SUCCESS) {
 518                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 519                     "qla_target(%d): get_id_list() failed: %x\n",
 520                     vha->vp_idx, rc);
 521                 res = -1;
 522                 goto out_free_id_list;
 523         }
 524
 525         id_iter = (char *)gid_list;
 526         res = -1;
 527         for (i = 0; i < entries; i++) {
 528                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 529                 if ((gid->al_pa == s_id[2]) &&
 530                     (gid->area == s_id[1]) &&
 531                     (gid->domain == s_id[0])) {
 532                         *loop_id = le16_to_cpu(gid->loop_id);
 533                         res = 0;
 534                         break;
 535                 }
 536                 id_iter += ha->gid_list_info_size;
 537         }
 538
 539 out_free_id_list:
 540         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 541             gid_list, gid_list_dma);
 542         return res;
 543 }
 544
 545 /* ha->hardware_lock supposed to be held on entry */
 546 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 547 {
 548         BUG_ON(!sess->deleted);
 549
 550         list_del(&sess->del_list_entry);
 551         sess->deleted = 0;
 552 }
 553
 554 static void qlt_del_sess_work_fn(struct delayed_work *work)
 555 {
 556         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 557             sess_del_work);
 558         struct scsi_qla_host *vha = tgt->vha;
 559         struct qla_hw_data *ha = vha->hw;
 560         struct qla_tgt_sess *sess;
 561         unsigned long flags, elapsed;
 562
 563         spin_lock_irqsave(&ha->hardware_lock, flags);
 564         while (!list_empty(&tgt->del_sess_list)) {
 565                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 566                     del_list_entry);
 567                 elapsed = jiffies;
 568                 if (time_after_eq(elapsed, sess->expires)) {
 569                         qlt_undelete_sess(sess);
 570
 571                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 572                             "Timeout: sess %p about to be deleted\n",
 573                             sess);
 574                         ha->tgt.tgt_ops->shutdown_sess(sess);
 575                         ha->tgt.tgt_ops->put_sess(sess);
 576                 } else {
 577                         schedule_delayed_work(&tgt->sess_del_work,
 578                             sess->expires - elapsed);
 579                         break;
 580                 }
 581         }
 582         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 583 }
 584
 585 /*
 586  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 587  * Caller must put it.
 588  */
 589 static struct qla_tgt_sess *qlt_create_sess(
 590         struct scsi_qla_host *vha,
 591         fc_port_t *fcport,
 592         bool local)
 593 {
 594         struct qla_hw_data *ha = vha->hw;
 595         struct qla_tgt_sess *sess;
 596         unsigned long flags;
 597         unsigned char be_sid[3];
 598
 599         /* Check to avoid double sessions */
 600         spin_lock_irqsave(&ha->hardware_lock, flags);
 601         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 602                                 sess_list_entry) {
 603                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 604                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 605                             "Double sess %p found (s_id %x:%x:%x, "
 606                             "loop_id %d), updating to d_id %x:%x:%x, "
 607                             "loop_id %d", sess, sess->s_id.b.domain,
 608                             sess->s_id.b.al_pa, sess->s_id.b.area,
 609                             sess->loop_id, fcport->d_id.b.domain,
 610                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 611                             fcport->loop_id);
 612
 613                         if (sess->deleted)
 614                                 qlt_undelete_sess(sess);
 615
 616                         kref_get(&sess->se_sess->sess_kref);
 617                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 618                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 619
 620                         if (sess->local && !local)
 621                                 sess->local = 0;
 622                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 623
 624                         return sess;
 625                 }
 626         }
 627         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 628
 629         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 630         if (!sess) {
 631                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 632                     "qla_target(%u): session allocation failed, all commands "
 633                     "from port %8phC will be refused", vha->vp_idx,
 634                     fcport->port_name);
 635
 636                 return NULL;
 637         }
 638         sess->tgt = vha->vha_tgt.qla_tgt;
 639         sess->vha = vha;
 640         sess->s_id = fcport->d_id;
 641         sess->loop_id = fcport->loop_id;
 642         sess->local = local;
 643
 644         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 645             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 646             sess, vha->vha_tgt.qla_tgt);
 647
 648         be_sid[0] = sess->s_id.b.domain;
 649         be_sid[1] = sess->s_id.b.area;
 650         be_sid[2] = sess->s_id.b.al_pa;
 651         /*
 652          * Determine if this fc_port->port_name is allowed to access
 653          * target mode using explict NodeACLs+MappedLUNs, or using
 654          * TPG demo mode.  If this is successful a target mode FC nexus
 655          * is created.
 656          */
 657         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 658             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 659                 kfree(sess);
 660                 return NULL;
 661         }
 662         /*
 663          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 664          * access across ->hardware_lock reaquire.
 665          */
 666         kref_get(&sess->se_sess->sess_kref);
 667
 668         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 669         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 670         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 671
 672         spin_lock_irqsave(&ha->hardware_lock, flags);
 673         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 674         vha->vha_tgt.qla_tgt->sess_count++;
 675         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 676
 677         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 678             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 679             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 680             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 681             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 682             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 683
 684         return sess;
 685 }
 686
 687 /*
 688  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 689  */
 690 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 691 {
 692         struct qla_hw_data *ha = vha->hw;
 693         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 694         struct qla_tgt_sess *sess;
 695         unsigned long flags;
 696
 697         if (!vha->hw->tgt.tgt_ops)
 698                 return;
 699
 700         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 701                 return;
 702
 703         if (qla_ini_mode_enabled(vha))
 704                 return;
 705
 706         spin_lock_irqsave(&ha->hardware_lock, flags);
 707         if (tgt->tgt_stop) {
 708                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 709                 return;
 710         }
 711         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 712         if (!sess) {
 713                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 714
 715                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 716                 sess = qlt_create_sess(vha, fcport, false);
 717                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 718
 719                 spin_lock_irqsave(&ha->hardware_lock, flags);
 720         } else {
 721                 kref_get(&sess->se_sess->sess_kref);
 722
 723                 if (sess->deleted) {
 724                         qlt_undelete_sess(sess);
 725
 726                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 727                             "qla_target(%u): %ssession for port %8phC "
 728                             "(loop ID %d) reappeared\n", vha->vp_idx,
 729                             sess->local ? "local " : "", sess->port_name,
 730                             sess->loop_id);
 731
 732                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 733                             "Reappeared sess %p\n", sess);
 734                 }
 735                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 736                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 737         }
 738
 739         if (sess && sess->local) {
 740                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 741                     "qla_target(%u): local session for "
 742                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 743                     fcport->port_name, sess->loop_id);
 744                 sess->local = 0;
 745         }
 746         ha->tgt.tgt_ops->put_sess(sess);
 747         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 748 }
 749
 750 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 751 {
 752         struct qla_hw_data *ha = vha->hw;
 753         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 754         struct qla_tgt_sess *sess;
 755         unsigned long flags;
 756
 757         if (!vha->hw->tgt.tgt_ops)
 758                 return;
 759
 760         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 761                 return;
 762
 763         spin_lock_irqsave(&ha->hardware_lock, flags);
 764         if (tgt->tgt_stop) {
 765                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 766                 return;
 767         }
 768         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 769         if (!sess) {
 770                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 771                 return;
 772         }
 773
 774         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 775
 776         sess->local = 1;
 777         qlt_schedule_sess_for_deletion(sess, false);
 778         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 779 }
 780
 781 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 782 {
 783         struct qla_hw_data *ha = tgt->ha;
 784         unsigned long flags;
 785         int res;
 786         /*
 787          * We need to protect against race, when tgt is freed before or
 788          * inside wake_up()
 789          */
 790         spin_lock_irqsave(&ha->hardware_lock, flags);
 791         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 792             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 793             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 794         res = (tgt->sess_count == 0);
 795         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 796
 797         return res;
 798 }
 799
 800 /* Called by tcm_qla2xxx configfs code */
 801 int qlt_stop_phase1(struct qla_tgt *tgt)
 802 {
 803         struct scsi_qla_host *vha = tgt->vha;
 804         struct qla_hw_data *ha = tgt->ha;
 805         unsigned long flags;
 806
 807         mutex_lock(&qla_tgt_mutex);
 808         if (!vha->fc_vport) {
 809                 struct Scsi_Host *sh = vha->host;
 810                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 811                 bool npiv_vports;
 812
 813                 spin_lock_irqsave(sh->host_lock, flags);
 814                 npiv_vports = (fc_host->npiv_vports_inuse);
 815                 spin_unlock_irqrestore(sh->host_lock, flags);
 816
 817                 if (npiv_vports) {
 818                         mutex_unlock(&qla_tgt_mutex);
 819                         return -EPERM;
 820                 }
 821         }
 822         if (tgt->tgt_stop || tgt->tgt_stopped) {
 823                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 824                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 825                 mutex_unlock(&qla_tgt_mutex);
 826                 return -EPERM;
 827         }
 828
 829         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 830             vha->host_no, vha);
 831         /*
 832          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 833          * Lock is needed, because we still can get an incoming packet.
 834          */
 835         mutex_lock(&vha->vha_tgt.tgt_mutex);
 836         spin_lock_irqsave(&ha->hardware_lock, flags);
 837         tgt->tgt_stop = 1;
 838         qlt_clear_tgt_db(tgt, true);
 839         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 840         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 841         mutex_unlock(&qla_tgt_mutex);
 842
 843         flush_delayed_work(&tgt->sess_del_work);
 844
 845         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 846             "Waiting for sess works (tgt %p)", tgt);
 847         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 848         while (!list_empty(&tgt->sess_works_list)) {
 849                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 850                 flush_scheduled_work();
 851                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 852         }
 853         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 854
 855         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 856             "Waiting for tgt %p: list_empty(sess_list)=%d "
 857             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 858             tgt->sess_count);
 859
 860         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 861
 862         /* Big hammer */
 863         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 864                 qlt_disable_vha(vha);
 865
 866         /* Wait for sessions to clear out (just in case) */
 867         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 868         return 0;
 869 }
 870 EXPORT_SYMBOL(qlt_stop_phase1);
 871
 872 /* Called by tcm_qla2xxx configfs code */
 873 void qlt_stop_phase2(struct qla_tgt *tgt)
 874 {
 875         struct qla_hw_data *ha = tgt->ha;
 876         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 877         unsigned long flags;
 878
 879         if (tgt->tgt_stopped) {
 880                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 881                     "Already in tgt->tgt_stopped state\n");
 882                 dump_stack();
 883                 return;
 884         }
 885
 886         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 887             "Waiting for %d IRQ commands to complete (tgt %p)",
 888             tgt->irq_cmd_count, tgt);
 889
 890         mutex_lock(&vha->vha_tgt.tgt_mutex);
 891         spin_lock_irqsave(&ha->hardware_lock, flags);
 892         while (tgt->irq_cmd_count != 0) {
 893                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 894                 udelay(2);
 895                 spin_lock_irqsave(&ha->hardware_lock, flags);
 896         }
 897         tgt->tgt_stop = 0;
 898         tgt->tgt_stopped = 1;
 899         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 900         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 901
 902         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 903             tgt);
 904 }
 905 EXPORT_SYMBOL(qlt_stop_phase2);
 906
 907 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 908 static void qlt_release(struct qla_tgt *tgt)
 909 {
 910         scsi_qla_host_t *vha = tgt->vha;
 911
 912         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 913                 qlt_stop_phase2(tgt);
 914
 915         vha->vha_tgt.qla_tgt = NULL;
 916
 917         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 918             "Release of tgt %p finished\n", tgt);
 919
 920         kfree(tgt);
 921 }
 922
 923 /* ha->hardware_lock supposed to be held on entry */
 924 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 925         const void *param, unsigned int param_size)
 926 {
 927         struct qla_tgt_sess_work_param *prm;
 928         unsigned long flags;
 929
 930         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 931         if (!prm) {
 932                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 933                     "qla_target(%d): Unable to create session "
 934                     "work, command will be refused", 0);
 935                 return -ENOMEM;
 936         }
 937
 938         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 939             "Scheduling work (type %d, prm %p)"
 940             " to find session for param %p (size %d, tgt %p)\n",
 941             type, prm, param, param_size, tgt);
 942
 943         prm->type = type;
 944         memcpy(&prm->tm_iocb, param, param_size);
 945
 946         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 947         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 948         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 949
 950         schedule_work(&tgt->sess_work);
 951
 952         return 0;
 953 }
 954
 955 /*
 956  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 957  */
 958 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 959         struct imm_ntfy_from_isp *ntfy,
 960         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 961         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 962 {
 963         struct qla_hw_data *ha = vha->hw;
 964         request_t *pkt;
 965         struct nack_to_isp *nack;
 966
 967         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 968
 969         /* Send marker if required */
 970         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 971                 return;
 972
 973         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 974         if (!pkt) {
 975                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 976                     "qla_target(%d): %s failed: unable to allocate "
 977                     "request packet\n", vha->vp_idx, __func__);
 978                 return;
 979         }
 980
 981         if (vha->vha_tgt.qla_tgt != NULL)
 982                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
 983
 984         pkt->entry_type = NOTIFY_ACK_TYPE;
 985         pkt->entry_count = 1;
 986
 987         nack = (struct nack_to_isp *)pkt;
 988         nack->ox_id = ntfy->ox_id;
 989
 990         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 991         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 992                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 993                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 994         }
 995         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 996         nack->u.isp24.status = ntfy->u.isp24.status;
 997         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 998         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
 999         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1000         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1001         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1002         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1003         nack->u.isp24.srr_reject_code = srr_reject_code;
1004         nack->u.isp24.srr_reject_code_expl = srr_explan;
1005         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1006
1007         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1008             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1009             vha->vp_idx, nack->u.isp24.status);
1010
1011         qla2x00_start_iocbs(vha, vha->req);
1012 }
1013
1014 /*
1015  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1016  */
1017 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1018         struct abts_recv_from_24xx *abts, uint32_t status,
1019         bool ids_reversed)
1020 {
1021         struct qla_hw_data *ha = vha->hw;
1022         struct abts_resp_to_24xx *resp;
1023         uint32_t f_ctl;
1024         uint8_t *p;
1025
1026         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1027             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1028             ha, abts, status);
1029
1030         /* Send marker if required */
1031         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1032                 return;
1033
1034         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1035         if (!resp) {
1036                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1037                     "qla_target(%d): %s failed: unable to allocate "
1038                     "request packet", vha->vp_idx, __func__);
1039                 return;
1040         }
1041
1042         resp->entry_type = ABTS_RESP_24XX;
1043         resp->entry_count = 1;
1044         resp->nport_handle = abts->nport_handle;
1045         resp->vp_index = vha->vp_idx;
1046         resp->sof_type = abts->sof_type;
1047         resp->exchange_address = abts->exchange_address;
1048         resp->fcp_hdr_le = abts->fcp_hdr_le;
1049         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1050             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1051             F_CTL_SEQ_INITIATIVE);
1052         p = (uint8_t *)&f_ctl;
1053         resp->fcp_hdr_le.f_ctl[0] = *p++;
1054         resp->fcp_hdr_le.f_ctl[1] = *p++;
1055         resp->fcp_hdr_le.f_ctl[2] = *p;
1056         if (ids_reversed) {
1057                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1058                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1059                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1060                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1061                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1062                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1063         } else {
1064                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1065                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1066                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1067                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1068                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1069                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1070         }
1071         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1072         if (status == FCP_TMF_CMPL) {
1073                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1074                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1075                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1076                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1077                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1078                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1079         } else {
1080                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1081                 resp->payload.ba_rjt.reason_code =
1082                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1083                 /* Other bytes are zero */
1084         }
1085
1086         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1087
1088         qla2x00_start_iocbs(vha, vha->req);
1089 }
1090
1091 /*
1092  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1093  */
1094 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1095         struct abts_resp_from_24xx_fw *entry)
1096 {
1097         struct ctio7_to_24xx *ctio;
1098
1099         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1100             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1101         /* Send marker if required */
1102         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1103                 return;
1104
1105         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1106         if (ctio == NULL) {
1107                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1108                     "qla_target(%d): %s failed: unable to allocate "
1109                     "request packet\n", vha->vp_idx, __func__);
1110                 return;
1111         }
1112
1113         /*
1114          * We've got on entrance firmware's response on by us generated
1115          * ABTS response. So, in it ID fields are reversed.
1116          */
1117
1118         ctio->entry_type = CTIO_TYPE7;
1119         ctio->entry_count = 1;
1120         ctio->nport_handle = entry->nport_handle;
1121         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1122         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1123         ctio->vp_index = vha->vp_idx;
1124         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1125         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1126         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1127         ctio->exchange_addr = entry->exchange_addr_to_abort;
1128         ctio->u.status1.flags =
1129             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1130                 CTIO7_FLAGS_TERMINATE);
1131         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1132
1133         qla2x00_start_iocbs(vha, vha->req);
1134
1135         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1136             FCP_TMF_CMPL, true);
1137 }
1138
1139 /* ha->hardware_lock supposed to be held on entry */
1140 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1141         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1142 {
1143         struct qla_hw_data *ha = vha->hw;
1144         struct se_session *se_sess = sess->se_sess;
1145         struct qla_tgt_mgmt_cmd *mcmd;
1146         struct se_cmd *se_cmd;
1147         u32 lun = 0;
1148         int rc;
1149         bool found_lun = false;
1150
1151         spin_lock(&se_sess->sess_cmd_lock);
1152         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1153                 struct qla_tgt_cmd *cmd =
1154                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1155                 if (cmd->tag == abts->exchange_addr_to_abort) {
1156                         lun = cmd->unpacked_lun;
1157                         found_lun = true;
1158                         break;
1159                 }
1160         }
1161         spin_unlock(&se_sess->sess_cmd_lock);
1162
1163         if (!found_lun)
1164                 return -ENOENT;
1165
1166         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1167             "qla_target(%d): task abort (tag=%d)\n",
1168             vha->vp_idx, abts->exchange_addr_to_abort);
1169
1170         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1171         if (mcmd == NULL) {
1172                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1173                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1174                     vha->vp_idx, __func__);
1175                 return -ENOMEM;
1176         }
1177         memset(mcmd, 0, sizeof(*mcmd));
1178
1179         mcmd->sess = sess;
1180         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1181
1182         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1183             abts->exchange_addr_to_abort);
1184         if (rc != 0) {
1185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1186                     "qla_target(%d):  tgt_ops->handle_tmr()"
1187                     " failed: %d", vha->vp_idx, rc);
1188                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1189                 return -EFAULT;
1190         }
1191
1192         return 0;
1193 }
1194
1195 /*
1196  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1197  */
1198 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1199         struct abts_recv_from_24xx *abts)
1200 {
1201         struct qla_hw_data *ha = vha->hw;
1202         struct qla_tgt_sess *sess;
1203         uint32_t tag = abts->exchange_addr_to_abort;
1204         uint8_t s_id[3];
1205         int rc;
1206
1207         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1208                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1209                     "qla_target(%d): ABTS: Abort Sequence not "
1210                     "supported\n", vha->vp_idx);
1211                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1212                 return;
1213         }
1214
1215         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1216                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1217                     "qla_target(%d): ABTS: Unknown Exchange "
1218                     "Address received\n", vha->vp_idx);
1219                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1220                 return;
1221         }
1222
1223         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1224             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1225             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1226             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1227             le32_to_cpu(abts->fcp_hdr_le.parameter));
1228
1229         s_id[0] = abts->fcp_hdr_le.s_id[2];
1230         s_id[1] = abts->fcp_hdr_le.s_id[1];
1231         s_id[2] = abts->fcp_hdr_le.s_id[0];
1232
1233         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1234         if (!sess) {
1235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1236                     "qla_target(%d): task abort for non-existant session\n",
1237                     vha->vp_idx);
1238                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1239                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1240                 if (rc != 0) {
1241                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1242                             false);
1243                 }
1244                 return;
1245         }
1246
1247         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1248         if (rc != 0) {
1249                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1250                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1251                     vha->vp_idx, rc);
1252                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1253                 return;
1254         }
1255 }
1256
1257 /*
1258  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1259  */
1260 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1261         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1262 {
1263         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1264         struct ctio7_to_24xx *ctio;
1265
1266         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1267             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1268             ha, atio, resp_code);
1269
1270         /* Send marker if required */
1271         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1272                 return;
1273
1274         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1275         if (ctio == NULL) {
1276                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1277                     "qla_target(%d): %s failed: unable to allocate "
1278                     "request packet\n", ha->vp_idx, __func__);
1279                 return;
1280         }
1281
1282         ctio->entry_type = CTIO_TYPE7;
1283         ctio->entry_count = 1;
1284         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1285         ctio->nport_handle = mcmd->sess->loop_id;
1286         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1287         ctio->vp_index = ha->vp_idx;
1288         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1289         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1290         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1291         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1292         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1293             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1294                 CTIO7_FLAGS_SEND_STATUS);
1295         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1296         ctio->u.status1.scsi_status =
1297             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1298         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1299         ctio->u.status1.sense_data[0] = resp_code;
1300
1301         qla2x00_start_iocbs(ha, ha->req);
1302 }
1303
1304 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1305 {
1306         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1307 }
1308 EXPORT_SYMBOL(qlt_free_mcmd);
1309
1310 /* callback from target fabric module code */
1311 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1312 {
1313         struct scsi_qla_host *vha = mcmd->sess->vha;
1314         struct qla_hw_data *ha = vha->hw;
1315         unsigned long flags;
1316
1317         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1318             "TM response mcmd (%p) status %#x state %#x",
1319             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1320
1321         spin_lock_irqsave(&ha->hardware_lock, flags);
1322         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1323                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1324                     0, 0, 0, 0, 0, 0);
1325         else {
1326                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1327                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1328                             mcmd->fc_tm_rsp, false);
1329                 else
1330                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1331                             mcmd->fc_tm_rsp);
1332         }
1333         /*
1334          * Make the callback for ->free_mcmd() to queue_work() and invoke
1335          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1336          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1337          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1338          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1339          * qlt_xmit_tm_rsp() returns here..
1340          */
1341         ha->tgt.tgt_ops->free_mcmd(mcmd);
1342         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1343 }
1344 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1345
1346 /* No locks */
1347 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1348 {
1349         struct qla_tgt_cmd *cmd = prm->cmd;
1350
1351         BUG_ON(cmd->sg_cnt == 0);
1352
1353         prm->sg = (struct scatterlist *)cmd->sg;
1354         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1355             cmd->sg_cnt, cmd->dma_data_direction);
1356         if (unlikely(prm->seg_cnt == 0))
1357                 goto out_err;
1358
1359         prm->cmd->sg_mapped = 1;
1360
1361         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1362                 /*
1363                  * If greater than four sg entries then we need to allocate
1364                  * the continuation entries
1365                  */
1366                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1367                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1368                         prm->tgt->datasegs_per_cmd,
1369                         prm->tgt->datasegs_per_cont);
1370         } else {
1371                 /* DIF */
1372                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1373                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1374                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1375                         prm->tot_dsds = prm->seg_cnt;
1376                 } else
1377                         prm->tot_dsds = prm->seg_cnt;
1378
1379                 if (cmd->prot_sg_cnt) {
1380                         prm->prot_sg      = cmd->prot_sg;
1381                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1382                                 cmd->prot_sg, cmd->prot_sg_cnt,
1383                                 cmd->dma_data_direction);
1384                         if (unlikely(prm->prot_seg_cnt == 0))
1385                                 goto out_err;
1386
1387                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1388                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1389                                 /* Dif Bundling not support here */
1390                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1391                                                                 cmd->blk_sz);
1392                                 prm->tot_dsds += prm->prot_seg_cnt;
1393                         } else
1394                                 prm->tot_dsds += prm->prot_seg_cnt;
1395                 }
1396         }
1397
1398         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1399             prm->seg_cnt, prm->req_cnt);
1400         return 0;
1401
1402 out_err:
1403         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1404             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1405             0, prm->cmd->sg_cnt);
1406         return -1;
1407 }
1408
1409 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1410         struct qla_tgt_cmd *cmd)
1411 {
1412         struct qla_hw_data *ha = vha->hw;
1413
1414         BUG_ON(!cmd->sg_mapped);
1415         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1416         cmd->sg_mapped = 0;
1417
1418         if (cmd->prot_sg_cnt)
1419                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1420                         cmd->dma_data_direction);
1421
1422         if (cmd->ctx_dsd_alloced)
1423                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1424
1425         if (cmd->ctx)
1426                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1427 }
1428
1429 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1430         uint32_t req_cnt)
1431 {
1432         struct qla_hw_data *ha = vha->hw;
1433         device_reg_t __iomem *reg = ha->iobase;
1434         uint32_t cnt;
1435
1436         if (vha->req->cnt < (req_cnt + 2)) {
1437                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1438
1439                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1440                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1441                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1442                     vha->req->ring_index, vha->req->cnt, req_cnt);
1443                 if  (vha->req->ring_index < cnt)
1444                         vha->req->cnt = cnt - vha->req->ring_index;
1445                 else
1446                         vha->req->cnt = vha->req->length -
1447                             (vha->req->ring_index - cnt);
1448         }
1449
1450         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1451                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1452                     "qla_target(%d): There is no room in the "
1453                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1454                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1455                     vha->req->cnt, req_cnt);
1456                 return -EAGAIN;
1457         }
1458         vha->req->cnt -= req_cnt;
1459
1460         return 0;
1461 }
1462
1463 /*
1464  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1465  */
1466 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1467 {
1468         /* Adjust ring index. */
1469         vha->req->ring_index++;
1470         if (vha->req->ring_index == vha->req->length) {
1471                 vha->req->ring_index = 0;
1472                 vha->req->ring_ptr = vha->req->ring;
1473         } else {
1474                 vha->req->ring_ptr++;
1475         }
1476         return (cont_entry_t *)vha->req->ring_ptr;
1477 }
1478
1479 /* ha->hardware_lock supposed to be held on entry */
1480 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1481 {
1482         struct qla_hw_data *ha = vha->hw;
1483         uint32_t h;
1484
1485         h = ha->tgt.current_handle;
1486         /* always increment cmd handle */
1487         do {
1488                 ++h;
1489                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1490                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1491                 if (h == ha->tgt.current_handle) {
1492                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1493                             "qla_target(%d): Ran out of "
1494                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1495                         h = QLA_TGT_NULL_HANDLE;
1496                         break;
1497                 }
1498         } while ((h == QLA_TGT_NULL_HANDLE) ||
1499             (h == QLA_TGT_SKIP_HANDLE) ||
1500             (ha->tgt.cmds[h-1] != NULL));
1501
1502         if (h != QLA_TGT_NULL_HANDLE)
1503                 ha->tgt.current_handle = h;
1504
1505         return h;
1506 }
1507
1508 /* ha->hardware_lock supposed to be held on entry */
1509 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1510         struct scsi_qla_host *vha)
1511 {
1512         uint32_t h;
1513         struct ctio7_to_24xx *pkt;
1514         struct qla_hw_data *ha = vha->hw;
1515         struct atio_from_isp *atio = &prm->cmd->atio;
1516
1517         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1518         prm->pkt = pkt;
1519         memset(pkt, 0, sizeof(*pkt));
1520
1521         pkt->entry_type = CTIO_TYPE7;
1522         pkt->entry_count = (uint8_t)prm->req_cnt;
1523         pkt->vp_index = vha->vp_idx;
1524
1525         h = qlt_make_handle(vha);
1526         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1527                 /*
1528                  * CTIO type 7 from the firmware doesn't provide a way to
1529                  * know the initiator's LOOP ID, hence we can't find
1530                  * the session and, so, the command.
1531                  */
1532                 return -EAGAIN;
1533         } else
1534                 ha->tgt.cmds[h-1] = prm->cmd;
1535
1536         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1537         pkt->nport_handle = prm->cmd->loop_id;
1538         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1539         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1540         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1541         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1542         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1543         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1544         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1545         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1546
1547         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1548             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1549             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1550             le16_to_cpu(pkt->u.status0.ox_id));
1551         return 0;
1552 }
1553
1554 /*
1555  * ha->hardware_lock supposed to be held on entry. We have already made sure
1556  * that there is sufficient amount of request entries to not drop it.
1557  */
1558 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1559         struct scsi_qla_host *vha)
1560 {
1561         int cnt;
1562         uint32_t *dword_ptr;
1563         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1564
1565         /* Build continuation packets */
1566         while (prm->seg_cnt > 0) {
1567                 cont_a64_entry_t *cont_pkt64 =
1568                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1569
1570                 /*
1571                  * Make sure that from cont_pkt64 none of
1572                  * 64-bit specific fields used for 32-bit
1573                  * addressing. Cast to (cont_entry_t *) for
1574                  * that.
1575                  */
1576
1577                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1578
1579                 cont_pkt64->entry_count = 1;
1580                 cont_pkt64->sys_define = 0;
1581
1582                 if (enable_64bit_addressing) {
1583                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1584                         dword_ptr =
1585                             (uint32_t *)&cont_pkt64->dseg_0_address;
1586                 } else {
1587                         cont_pkt64->entry_type = CONTINUE_TYPE;
1588                         dword_ptr =
1589                             (uint32_t *)&((cont_entry_t *)
1590                                 cont_pkt64)->dseg_0_address;
1591                 }
1592
1593                 /* Load continuation entry data segments */
1594                 for (cnt = 0;
1595                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1596                     cnt++, prm->seg_cnt--) {
1597                         *dword_ptr++ =
1598                             cpu_to_le32(pci_dma_lo32
1599                                 (sg_dma_address(prm->sg)));
1600                         if (enable_64bit_addressing) {
1601                                 *dword_ptr++ =
1602                                     cpu_to_le32(pci_dma_hi32
1603                                         (sg_dma_address
1604                                         (prm->sg)));
1605                         }
1606                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1607
1608                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1609                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1610                             (long long unsigned int)
1611                             pci_dma_hi32(sg_dma_address(prm->sg)),
1612                             (long long unsigned int)
1613                             pci_dma_lo32(sg_dma_address(prm->sg)),
1614                             (int)sg_dma_len(prm->sg));
1615
1616                         prm->sg = sg_next(prm->sg);
1617                 }
1618         }
1619 }
1620
1621 /*
1622  * ha->hardware_lock supposed to be held on entry. We have already made sure
1623  * that there is sufficient amount of request entries to not drop it.
1624  */
1625 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1626         struct scsi_qla_host *vha)
1627 {
1628         int cnt;
1629         uint32_t *dword_ptr;
1630         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1631         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1632
1633         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1634             "iocb->scsi_status=%x, iocb->flags=%x\n",
1635             le16_to_cpu(pkt24->u.status0.scsi_status),
1636             le16_to_cpu(pkt24->u.status0.flags));
1637
1638         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1639
1640         /* Setup packet address segment pointer */
1641         dword_ptr = pkt24->u.status0.dseg_0_address;
1642
1643         /* Set total data segment count */
1644         if (prm->seg_cnt)
1645                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1646
1647         if (prm->seg_cnt == 0) {
1648                 /* No data transfer */
1649                 *dword_ptr++ = 0;
1650                 *dword_ptr = 0;
1651                 return;
1652         }
1653
1654         /* If scatter gather */
1655         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1656
1657         /* Load command entry data segments */
1658         for (cnt = 0;
1659             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1660             cnt++, prm->seg_cnt--) {
1661                 *dword_ptr++ =
1662                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1663                 if (enable_64bit_addressing) {
1664                         *dword_ptr++ =
1665                             cpu_to_le32(pci_dma_hi32(
1666                                 sg_dma_address(prm->sg)));
1667                 }
1668                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1669
1670                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1671                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1672                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1673                     prm->sg)),
1674                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1675                     prm->sg)),
1676                     (int)sg_dma_len(prm->sg));
1677
1678                 prm->sg = sg_next(prm->sg);
1679         }
1680
1681         qlt_load_cont_data_segments(prm, vha);
1682 }
1683
1684 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1685 {
1686         return cmd->bufflen > 0;
1687 }
1688
1689 /*
1690  * Called without ha->hardware_lock held
1691  */
1692 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1693         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1694         uint32_t *full_req_cnt)
1695 {
1696         struct qla_tgt *tgt = cmd->tgt;
1697         struct scsi_qla_host *vha = tgt->vha;
1698         struct qla_hw_data *ha = vha->hw;
1699         struct se_cmd *se_cmd = &cmd->se_cmd;
1700
1701         if (unlikely(cmd->aborted)) {
1702                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1703                     "qla_target(%d): terminating exchange "
1704                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1705                     se_cmd, cmd->tag);
1706
1707                 cmd->state = QLA_TGT_STATE_ABORTED;
1708
1709                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1710
1711                 /* !! At this point cmd could be already freed !! */
1712                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1713         }
1714
1715         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u ox_id %04x\n",
1716                 vha->vp_idx, cmd->tag,
1717                 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
1718
1719         prm->cmd = cmd;
1720         prm->tgt = tgt;
1721         prm->rq_result = scsi_status;
1722         prm->sense_buffer = &cmd->sense_buffer[0];
1723         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1724         prm->sg = NULL;
1725         prm->seg_cnt = -1;
1726         prm->req_cnt = 1;
1727         prm->add_status_pkt = 0;
1728
1729         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1730             prm->rq_result, xmit_type);
1731
1732         /* Send marker if required */
1733         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1734                 return -EFAULT;
1735
1736         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1737
1738         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1739                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1740                         return -EAGAIN;
1741         }
1742
1743         *full_req_cnt = prm->req_cnt;
1744
1745         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1746                 prm->residual = se_cmd->residual_count;
1747                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1748                     "Residual underflow: %d (tag %d, "
1749                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1750                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1751                     cmd->bufflen, prm->rq_result);
1752                 prm->rq_result |= SS_RESIDUAL_UNDER;
1753         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1754                 prm->residual = se_cmd->residual_count;
1755                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1756                     "Residual overflow: %d (tag %d, "
1757                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1758                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1759                     cmd->bufflen, prm->rq_result);
1760                 prm->rq_result |= SS_RESIDUAL_OVER;
1761         }
1762
1763         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1764                 /*
1765                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1766                  * ignored in *xmit_response() below
1767                  */
1768                 if (qlt_has_data(cmd)) {
1769                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1770                             (IS_FWI2_CAPABLE(ha) &&
1771                             (prm->rq_result != 0))) {
1772                                 prm->add_status_pkt = 1;
1773                                 (*full_req_cnt)++;
1774                         }
1775                 }
1776         }
1777
1778         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1779             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1780             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1781
1782         return 0;
1783 }
1784
1785 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1786         struct qla_tgt_cmd *cmd, int sending_sense)
1787 {
1788         if (ha->tgt.enable_class_2)
1789                 return 0;
1790
1791         if (sending_sense)
1792                 return cmd->conf_compl_supported;
1793         else
1794                 return ha->tgt.enable_explicit_conf &&
1795                     cmd->conf_compl_supported;
1796 }
1797
1798 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1799 /*
1800  *  Original taken from the XFS code
1801  */
1802 static unsigned long qlt_srr_random(void)
1803 {
1804         static int Inited;
1805         static unsigned long RandomValue;
1806         static DEFINE_SPINLOCK(lock);
1807         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1808         register long rv;
1809         register long lo;
1810         register long hi;
1811         unsigned long flags;
1812
1813         spin_lock_irqsave(&lock, flags);
1814         if (!Inited) {
1815                 RandomValue = jiffies;
1816                 Inited = 1;
1817         }
1818         rv = RandomValue;
1819         hi = rv / 127773;
1820         lo = rv % 127773;
1821         rv = 16807 * lo - 2836 * hi;
1822         if (rv <= 0)
1823                 rv += 2147483647;
1824         RandomValue = rv;
1825         spin_unlock_irqrestore(&lock, flags);
1826         return rv;
1827 }
1828
1829 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1830 {
1831 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1832         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1833             == 50) {
1834                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1835                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1836                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1837         }
1838 #endif
1839         /*
1840          * It's currently not possible to simulate SRRs for FCP_WRITE without
1841          * a physical link layer failure, so don't even try here..
1842          */
1843         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1844                 return;
1845
1846         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1847             ((qlt_srr_random() % 100) == 20)) {
1848                 int i, leave = 0;
1849                 unsigned int tot_len = 0;
1850
1851                 while (leave == 0)
1852                         leave = qlt_srr_random() % cmd->sg_cnt;
1853
1854                 for (i = 0; i < leave; i++)
1855                         tot_len += cmd->sg[i].length;
1856
1857                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1858                     "Cutting cmd %p (tag %d) buffer"
1859                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1860                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1861                     cmd->bufflen, cmd->sg_cnt);
1862
1863                 cmd->bufflen = tot_len;
1864                 cmd->sg_cnt = leave;
1865         }
1866
1867         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1868                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1869
1870                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1871                     "Cutting cmd %p (tag %d) buffer head "
1872                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1873                     cmd->bufflen);
1874                 if (offset == 0)
1875                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1876                 else if (qlt_set_data_offset(cmd, offset)) {
1877                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1878                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1879                 }
1880         }
1881 }
1882 #else
1883 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1884 {}
1885 #endif
1886
1887 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1888         struct qla_tgt_prm *prm)
1889 {
1890         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1891             (uint32_t)sizeof(ctio->u.status1.sense_data));
1892         ctio->u.status0.flags |=
1893             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1894         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1895                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1896                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1897                     CTIO7_FLAGS_CONFORM_REQ);
1898         }
1899         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1900         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1901         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1902                 int i;
1903
1904                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1905                         if (prm->cmd->se_cmd.scsi_status != 0) {
1906                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1907                                     "Skipping EXPLICIT_CONFORM and "
1908                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1909                                     "non GOOD status\n");
1910                                 goto skip_explict_conf;
1911                         }
1912                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1913                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1914                             CTIO7_FLAGS_CONFORM_REQ);
1915                 }
1916 skip_explict_conf:
1917                 ctio->u.status1.flags &=
1918                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1919                 ctio->u.status1.flags |=
1920                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1921                 ctio->u.status1.scsi_status |=
1922                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1923                 ctio->u.status1.sense_length =
1924                     cpu_to_le16(prm->sense_buffer_len);
1925                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1926                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1927                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1928 #if 0
1929                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1930                         static int q;
1931                         if (q < 10) {
1932                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1933                                     "qla_target(%d): %d bytes of sense "
1934                                     "lost", prm->tgt->ha->vp_idx,
1935                                     prm->sense_buffer_len % 4);
1936                                 q++;
1937                         }
1938                 }
1939 #endif
1940         } else {
1941                 ctio->u.status1.flags &=
1942                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1943                 ctio->u.status1.flags |=
1944                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1945                 ctio->u.status1.sense_length = 0;
1946                 memset(ctio->u.status1.sense_data, 0,
1947                     sizeof(ctio->u.status1.sense_data));
1948         }
1949
1950         /* Sense with len > 24, is it possible ??? */
1951 }
1952
1953
1954
1955 /* diff  */
1956 static inline int
1957 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1958 {
1959         /*
1960          * Uncomment when corresponding SCSI changes are done.
1961          *
1962          if (!sp->cmd->prot_chk)
1963          return 0;
1964          *
1965          */
1966         switch (se_cmd->prot_op) {
1967         case TARGET_PROT_DOUT_INSERT:
1968         case TARGET_PROT_DIN_STRIP:
1969                 if (ql2xenablehba_err_chk >= 1)
1970                         return 1;
1971                 break;
1972         case TARGET_PROT_DOUT_PASS:
1973         case TARGET_PROT_DIN_PASS:
1974                 if (ql2xenablehba_err_chk >= 2)
1975                         return 1;
1976                 break;
1977         case TARGET_PROT_DIN_INSERT:
1978         case TARGET_PROT_DOUT_STRIP:
1979                 return 1;
1980         default:
1981                 break;
1982         }
1983         return 0;
1984 }
1985
1986 /*
1987  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1988  *
1989  */
1990 static inline void
1991 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
1992 {
1993         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
1994
1995         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
1996          * have been immplemented by TCM, before AppTag is avail.
1997          * Look for modesense_handlers[]
1998          */
1999         ctx->app_tag = 0;
2000         ctx->app_tag_mask[0] = 0x0;
2001         ctx->app_tag_mask[1] = 0x0;
2002
2003         switch (se_cmd->prot_type) {
2004         case TARGET_DIF_TYPE0_PROT:
2005                 /*
2006                  * No check for ql2xenablehba_err_chk, as it would be an
2007                  * I/O error if hba tag generation is not done.
2008                  */
2009                 ctx->ref_tag = cpu_to_le32(lba);
2010
2011                 if (!qlt_hba_err_chk_enabled(se_cmd))
2012                         break;
2013
2014                 /* enable ALL bytes of the ref tag */
2015                 ctx->ref_tag_mask[0] = 0xff;
2016                 ctx->ref_tag_mask[1] = 0xff;
2017                 ctx->ref_tag_mask[2] = 0xff;
2018                 ctx->ref_tag_mask[3] = 0xff;
2019                 break;
2020         /*
2021          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2022          * 16 bit app tag.
2023          */
2024         case TARGET_DIF_TYPE1_PROT:
2025                 ctx->ref_tag = cpu_to_le32(lba);
2026
2027                 if (!qlt_hba_err_chk_enabled(se_cmd))
2028                         break;
2029
2030                 /* enable ALL bytes of the ref tag */
2031                 ctx->ref_tag_mask[0] = 0xff;
2032                 ctx->ref_tag_mask[1] = 0xff;
2033                 ctx->ref_tag_mask[2] = 0xff;
2034                 ctx->ref_tag_mask[3] = 0xff;
2035                 break;
2036         /*
2037          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2038          * match LBA in CDB + N
2039          */
2040         case TARGET_DIF_TYPE2_PROT:
2041                 ctx->ref_tag = cpu_to_le32(lba);
2042
2043                 if (!qlt_hba_err_chk_enabled(se_cmd))
2044                         break;
2045
2046                 /* enable ALL bytes of the ref tag */
2047                 ctx->ref_tag_mask[0] = 0xff;
2048                 ctx->ref_tag_mask[1] = 0xff;
2049                 ctx->ref_tag_mask[2] = 0xff;
2050                 ctx->ref_tag_mask[3] = 0xff;
2051                 break;
2052
2053         /* For Type 3 protection: 16 bit GUARD only */
2054         case TARGET_DIF_TYPE3_PROT:
2055                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2056                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2057                 break;
2058         }
2059 }
2060
2061
2062 static inline int
2063 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2064 {
2065         uint32_t                *cur_dsd;
2066         int                     sgc;
2067         uint32_t                transfer_length = 0;
2068         uint32_t                data_bytes;
2069         uint32_t                dif_bytes;
2070         uint8_t                 bundling = 1;
2071         uint8_t                 *clr_ptr;
2072         struct crc_context      *crc_ctx_pkt = NULL;
2073         struct qla_hw_data      *ha;
2074         struct ctio_crc2_to_fw  *pkt;
2075         dma_addr_t              crc_ctx_dma;
2076         uint16_t                fw_prot_opts = 0;
2077         struct qla_tgt_cmd      *cmd = prm->cmd;
2078         struct se_cmd           *se_cmd = &cmd->se_cmd;
2079         uint32_t h;
2080         struct atio_from_isp *atio = &prm->cmd->atio;
2081         uint16_t t16;
2082
2083         sgc = 0;
2084         ha = vha->hw;
2085
2086         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2087         prm->pkt = pkt;
2088         memset(pkt, 0, sizeof(*pkt));
2089
2090         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2091                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2092                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2093                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2094
2095         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2096             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2097                 bundling = 0;
2098
2099         /* Compute dif len and adjust data len to incude protection */
2100         data_bytes = cmd->bufflen;
2101         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2102
2103         switch (se_cmd->prot_op) {
2104         case TARGET_PROT_DIN_INSERT:
2105         case TARGET_PROT_DOUT_STRIP:
2106                 transfer_length = data_bytes;
2107                 data_bytes += dif_bytes;
2108                 break;
2109
2110         case TARGET_PROT_DIN_STRIP:
2111         case TARGET_PROT_DOUT_INSERT:
2112         case TARGET_PROT_DIN_PASS:
2113         case TARGET_PROT_DOUT_PASS:
2114                 transfer_length = data_bytes + dif_bytes;
2115                 break;
2116
2117         default:
2118                 BUG();
2119                 break;
2120         }
2121
2122         if (!qlt_hba_err_chk_enabled(se_cmd))
2123                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2124         /* HBA error checking enabled */
2125         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2126                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2127                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2128                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2129                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2130                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2131         }
2132
2133         switch (se_cmd->prot_op) {
2134         case TARGET_PROT_DIN_INSERT:
2135         case TARGET_PROT_DOUT_INSERT:
2136                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2137                 break;
2138         case TARGET_PROT_DIN_STRIP:
2139         case TARGET_PROT_DOUT_STRIP:
2140                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2141                 break;
2142         case TARGET_PROT_DIN_PASS:
2143         case TARGET_PROT_DOUT_PASS:
2144                 fw_prot_opts |= PO_MODE_DIF_PASS;
2145                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2146                 break;
2147         default:/* Normal Request */
2148                 fw_prot_opts |= PO_MODE_DIF_PASS;
2149                 break;
2150         }
2151
2152
2153         /* ---- PKT ---- */
2154         /* Update entry type to indicate Command Type CRC_2 IOCB */
2155         pkt->entry_type  = CTIO_CRC2;
2156         pkt->entry_count = 1;
2157         pkt->vp_index = vha->vp_idx;
2158
2159         h = qlt_make_handle(vha);
2160         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2161                 /*
2162                  * CTIO type 7 from the firmware doesn't provide a way to
2163                  * know the initiator's LOOP ID, hence we can't find
2164                  * the session and, so, the command.
2165                  */
2166                 return -EAGAIN;
2167         } else
2168                 ha->tgt.cmds[h-1] = prm->cmd;
2169
2170
2171         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2172         pkt->nport_handle = prm->cmd->loop_id;
2173         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2174         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2175         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2176         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2177         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2178
2179         /* silence compile warning */
2180         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2181         pkt->ox_id  = cpu_to_le16(t16);
2182
2183         t16 = (atio->u.isp24.attr << 9);
2184         pkt->flags |= cpu_to_le16(t16);
2185         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2186
2187         /* Set transfer direction */
2188         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2189                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2190         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2191                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2192
2193
2194         pkt->dseg_count = prm->tot_dsds;
2195         /* Fibre channel byte count */
2196         pkt->transfer_length = cpu_to_le32(transfer_length);
2197
2198
2199         /* ----- CRC context -------- */
2200
2201         /* Allocate CRC context from global pool */
2202         crc_ctx_pkt = cmd->ctx =
2203             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2204
2205         if (!crc_ctx_pkt)
2206                 goto crc_queuing_error;
2207
2208         /* Zero out CTX area. */
2209         clr_ptr = (uint8_t *)crc_ctx_pkt;
2210         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2211
2212         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2213         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2214
2215         /* Set handle */
2216         crc_ctx_pkt->handle = pkt->handle;
2217
2218         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2219
2220         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2221         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2222         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2223
2224
2225         if (!bundling) {
2226                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2227         } else {
2228                 /*
2229                  * Configure Bundling if we need to fetch interlaving
2230                  * protection PCI accesses
2231                  */
2232                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2233                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2234                 crc_ctx_pkt->u.bundling.dseg_count =
2235                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2236                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2237         }
2238
2239         /* Finish the common fields of CRC pkt */
2240         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2241         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2242         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2243         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2244
2245
2246         /* Walks data segments */
2247         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2248
2249         if (!bundling && prm->prot_seg_cnt) {
2250                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2251                         prm->tot_dsds, cmd))
2252                         goto crc_queuing_error;
2253         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2254                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2255                 goto crc_queuing_error;
2256
2257         if (bundling && prm->prot_seg_cnt) {
2258                 /* Walks dif segments */
2259                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2260
2261                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2262                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2263                         prm->prot_seg_cnt, cmd))
2264                         goto crc_queuing_error;
2265         }
2266         return QLA_SUCCESS;
2267
2268 crc_queuing_error:
2269         /* Cleanup will be performed by the caller */
2270
2271         return QLA_FUNCTION_FAILED;
2272 }
2273
2274
2275 /*
2276  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2277  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2278  */
2279 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2280         uint8_t scsi_status)
2281 {
2282         struct scsi_qla_host *vha = cmd->vha;
2283         struct qla_hw_data *ha = vha->hw;
2284         struct ctio7_to_24xx *pkt;
2285         struct qla_tgt_prm prm;
2286         uint32_t full_req_cnt = 0;
2287         unsigned long flags = 0;
2288         int res;
2289
2290         memset(&prm, 0, sizeof(prm));
2291         qlt_check_srr_debug(cmd, &xmit_type);
2292
2293         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2294             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2295             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2296             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2297             &cmd->se_cmd);
2298
2299         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2300             &full_req_cnt);
2301         if (unlikely(res != 0)) {
2302                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2303                         return 0;
2304
2305                 return res;
2306         }
2307
2308         spin_lock_irqsave(&ha->hardware_lock, flags);
2309
2310         /* Does F/W have an IOCBs for this request */
2311         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2312         if (unlikely(res))
2313                 goto out_unmap_unlock;
2314
2315         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2316                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2317         else
2318                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2319         if (unlikely(res != 0))
2320                 goto out_unmap_unlock;
2321
2322
2323         pkt = (struct ctio7_to_24xx *)prm.pkt;
2324
2325         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2326                 pkt->u.status0.flags |=
2327                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2328                         CTIO7_FLAGS_STATUS_MODE_0);
2329
2330                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2331                         qlt_load_data_segments(&prm, vha);
2332
2333                 if (prm.add_status_pkt == 0) {
2334                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2335                                 pkt->u.status0.scsi_status =
2336                                     cpu_to_le16(prm.rq_result);
2337                                 pkt->u.status0.residual =
2338                                     cpu_to_le32(prm.residual);
2339                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2340                                     CTIO7_FLAGS_SEND_STATUS);
2341                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2342                                         pkt->u.status0.flags |=
2343                                             __constant_cpu_to_le16(
2344                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2345                                                 CTIO7_FLAGS_CONFORM_REQ);
2346                                 }
2347                         }
2348
2349                 } else {
2350                         /*
2351                          * We have already made sure that there is sufficient
2352                          * amount of request entries to not drop HW lock in
2353                          * req_pkt().
2354                          */
2355                         struct ctio7_to_24xx *ctio =
2356                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2357
2358                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2359                             "Building additional status packet\n");
2360
2361                         /*
2362                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2363                          * ctio7_to_24xx
2364                          */
2365                         memcpy(ctio, pkt, sizeof(*ctio));
2366                         /* reset back to CTIO7 */
2367                         ctio->entry_count = 1;
2368                         ctio->entry_type = CTIO_TYPE7;
2369                         ctio->dseg_count = 0;
2370                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2371                             CTIO7_FLAGS_DATA_IN);
2372
2373                         /* Real finish is ctio_m1's finish */
2374                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2375                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2376                             CTIO7_FLAGS_DONT_RET_CTIO);
2377
2378                         /* qlt_24xx_init_ctio_to_isp will correct
2379                          * all neccessary fields that's part of CTIO7.
2380                          * There should be no residual of CTIO-CRC2 data.
2381                          */
2382                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2383                             &prm);
2384                         pr_debug("Status CTIO7: %p\n", ctio);
2385                 }
2386         } else
2387                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2388
2389
2390         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2391
2392         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2393             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2394             pkt, scsi_status);
2395
2396         qla2x00_start_iocbs(vha, vha->req);
2397         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2398
2399         return 0;
2400
2401 out_unmap_unlock:
2402         if (cmd->sg_mapped)
2403                 qlt_unmap_sg(vha, cmd);
2404         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2405
2406         return res;
2407 }
2408 EXPORT_SYMBOL(qlt_xmit_response);
2409
2410 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2411 {
2412         struct ctio7_to_24xx *pkt;
2413         struct scsi_qla_host *vha = cmd->vha;
2414         struct qla_hw_data *ha = vha->hw;
2415         struct qla_tgt *tgt = cmd->tgt;
2416         struct qla_tgt_prm prm;
2417         unsigned long flags;
2418         int res = 0;
2419
2420         memset(&prm, 0, sizeof(prm));
2421         prm.cmd = cmd;
2422         prm.tgt = tgt;
2423         prm.sg = NULL;
2424         prm.req_cnt = 1;
2425
2426         /* Send marker if required */
2427         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2428                 return -EIO;
2429
2430         ql_dbg(ql_dbg_tgt, vha, 0xe01b,
2431                 "%s: CTIO_start: vha(%d) se_cmd %p ox_id %04x\n",
2432                 __func__, (int)vha->vp_idx, &cmd->se_cmd,
2433                 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2434
2435         /* Calculate number of entries and segments required */
2436         if (qlt_pci_map_calc_cnt(&prm) != 0)
2437                 return -EAGAIN;
2438
2439         spin_lock_irqsave(&ha->hardware_lock, flags);
2440
2441         /* Does F/W have an IOCBs for this request */
2442         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2443         if (res != 0)
2444                 goto out_unlock_free_unmap;
2445         if (cmd->se_cmd.prot_op)
2446                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2447         else
2448                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2449
2450         if (unlikely(res != 0))
2451                 goto out_unlock_free_unmap;
2452         pkt = (struct ctio7_to_24xx *)prm.pkt;
2453         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2454             CTIO7_FLAGS_STATUS_MODE_0);
2455
2456         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2457                 qlt_load_data_segments(&prm, vha);
2458
2459         cmd->state = QLA_TGT_STATE_NEED_DATA;
2460
2461         qla2x00_start_iocbs(vha, vha->req);
2462         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2463
2464         return res;
2465
2466 out_unlock_free_unmap:
2467         if (cmd->sg_mapped)
2468                 qlt_unmap_sg(vha, cmd);
2469         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2470
2471         return res;
2472 }
2473 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2474
2475
2476 /*
2477  * Checks the guard or meta-data for the type of error
2478  * detected by the HBA.
2479  */
2480 static inline int
2481 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2482                 struct ctio_crc_from_fw *sts)
2483 {
2484         uint8_t         *ap = &sts->actual_dif[0];
2485         uint8_t         *ep = &sts->expected_dif[0];
2486         uint32_t        e_ref_tag, a_ref_tag;
2487         uint16_t        e_app_tag, a_app_tag;
2488         uint16_t        e_guard, a_guard;
2489         uint64_t        lba = cmd->se_cmd.t_task_lba;
2490
2491         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2492         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2493         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2494
2495         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2496         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2497         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2498
2499         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2500             "iocb(s) %p Returned STATUS.\n", sts);
2501
2502         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2503             "dif check TGT cdb 0x%x lba 0x%llu: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2504             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2505             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2506
2507         /*
2508          * Ignore sector if:
2509          * For type     3: ref & app tag is all 'f's
2510          * For type 0,1,2: app tag is all 'f's
2511          */
2512         if ((a_app_tag == 0xffff) &&
2513             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2514              (a_ref_tag == 0xffffffff))) {
2515                 uint32_t blocks_done;
2516
2517                 /* 2TB boundary case covered automatically with this */
2518                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2519                 cmd->se_cmd.bad_sector = e_ref_tag;
2520                 cmd->se_cmd.pi_err = 0;
2521                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2522                         "need to return scsi good\n");
2523
2524                 /* Update protection tag */
2525                 if (cmd->prot_sg_cnt) {
2526                         uint32_t i, j = 0, k = 0, num_ent;
2527                         struct scatterlist *sg, *sgl;
2528
2529
2530                         sgl = cmd->prot_sg;
2531
2532                         /* Patch the corresponding protection tags */
2533                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2534                                 num_ent = sg_dma_len(sg) / 8;
2535                                 if (k + num_ent < blocks_done) {
2536                                         k += num_ent;
2537                                         continue;
2538                                 }
2539                                 j = blocks_done - k - 1;
2540                                 k = blocks_done;
2541                                 break;
2542                         }
2543
2544                         if (k != blocks_done) {
2545                                 ql_log(ql_log_warn, vha, 0xf076,
2546                                     "unexpected tag values tag:lba=%u:%llu)\n",
2547                                     e_ref_tag, (unsigned long long)lba);
2548                                 goto out;
2549                         }
2550
2551 #if 0
2552                         struct sd_dif_tuple *spt;
2553                         /* TODO:
2554                          * This section came from initiator. Is it valid here?
2555                          * should ulp be override with actual val???
2556                          */
2557                         spt = page_address(sg_page(sg)) + sg->offset;
2558                         spt += j;
2559
2560                         spt->app_tag = 0xffff;
2561                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2562                                 spt->ref_tag = 0xffffffff;
2563 #endif
2564                 }
2565
2566                 return 0;
2567         }
2568
2569         /* check guard */
2570         if (e_guard != a_guard) {
2571                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2572                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2573
2574                 ql_log(ql_log_warn, vha, 0xe076,
2575                     "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",
2576                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2577                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2578                     a_guard, e_guard, cmd);
2579                 goto out;
2580         }
2581
2582         /* check ref tag */
2583         if (e_ref_tag != a_ref_tag) {
2584                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2585                 cmd->se_cmd.bad_sector = e_ref_tag;
2586
2587                 ql_log(ql_log_warn, vha, 0xe077,
2588                         "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",
2589                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2590                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2591                         a_guard, e_guard, cmd);
2592                 goto out;
2593         }
2594
2595         /* check appl tag */
2596         if (e_app_tag != a_app_tag) {
2597                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2598                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2599
2600                 ql_log(ql_log_warn, vha, 0xe078,
2601                         "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",
2602                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2603                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2604                         a_guard, e_guard, cmd);
2605                 goto out;
2606         }
2607 out:
2608         return 1;
2609 }
2610
2611
2612 /* If hardware_lock held on entry, might drop it, then reaquire */
2613 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2614 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2615         struct qla_tgt_cmd *cmd,
2616         struct atio_from_isp *atio)
2617 {
2618         struct ctio7_to_24xx *ctio24;
2619         struct qla_hw_data *ha = vha->hw;
2620         request_t *pkt;
2621         int ret = 0;
2622
2623         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2624
2625         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2626         if (pkt == NULL) {
2627                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2628                     "qla_target(%d): %s failed: unable to allocate "
2629                     "request packet\n", vha->vp_idx, __func__);
2630                 return -ENOMEM;
2631         }
2632
2633         if (cmd != NULL) {
2634                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2635                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2636                             "qla_target(%d): Terminating cmd %p with "
2637                             "incorrect state %d\n", vha->vp_idx, cmd,
2638                             cmd->state);
2639                 } else
2640                         ret = 1;
2641         }
2642
2643         pkt->entry_count = 1;
2644         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2645
2646         ctio24 = (struct ctio7_to_24xx *)pkt;
2647         ctio24->entry_type = CTIO_TYPE7;
2648         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2649         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2650         ctio24->vp_index = vha->vp_idx;
2651         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2652         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2653         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2654         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2655         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2656             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2657                 CTIO7_FLAGS_TERMINATE);
2658         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2659
2660         /* Most likely, it isn't needed */
2661         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2662             &atio->u.isp24.fcp_cmnd.add_cdb[
2663             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2664         if (ctio24->u.status1.residual != 0)
2665                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2666
2667         qla2x00_start_iocbs(vha, vha->req);
2668         return ret;
2669 }
2670
2671 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2672         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2673 {
2674         unsigned long flags;
2675         int rc;
2676
2677         if (qlt_issue_marker(vha, ha_locked) < 0)
2678                 return;
2679
2680         if (ha_locked) {
2681                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2682                 goto done;
2683         }
2684         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2685         rc = __qlt_send_term_exchange(vha, cmd, atio);
2686         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2687 done:
2688         /*
2689          * Terminate exchange will tell fw to release any active CTIO
2690          * that's in FW posession and cleanup the exchange.
2691          *
2692          * "cmd->state == QLA_TGT_STATE_ABORTED" means CTIO is still
2693          * down at FW.  Free the cmd later when CTIO comes back later
2694          * w/aborted(0x2) status.
2695          *
2696          * "cmd->state != QLA_TGT_STATE_ABORTED" means CTIO is already
2697          * back w/some err.  Free the cmd now.
2698          */
2699         if ((rc == 1) && (cmd->state != QLA_TGT_STATE_ABORTED)) {
2700                 if (!ha_locked && !in_interrupt())
2701                         msleep(250); /* just in case */
2702
2703                 if (cmd->sg_mapped)
2704                         qlt_unmap_sg(vha, cmd);
2705                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2706         }
2707         return;
2708 }
2709
2710 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2711 {
2712         struct qla_tgt_sess *sess = cmd->sess;
2713
2714         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2715             "%s: se_cmd[%p] ox_id %04x\n",
2716             __func__, &cmd->se_cmd,
2717             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2718
2719         BUG_ON(cmd->sg_mapped);
2720         if (unlikely(cmd->free_sg))
2721                 kfree(cmd->sg);
2722
2723         if (!sess || !sess->se_sess) {
2724                 WARN_ON(1);
2725                 return;
2726         }
2727         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2728 }
2729 EXPORT_SYMBOL(qlt_free_cmd);
2730
2731 /* ha->hardware_lock supposed to be held on entry */
2732 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2733         struct qla_tgt_cmd *cmd, void *ctio)
2734 {
2735         struct qla_tgt_srr_ctio *sc;
2736         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2737         struct qla_tgt_srr_imm *imm;
2738
2739         tgt->ctio_srr_id++;
2740
2741         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2742             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2743
2744         if (!ctio) {
2745                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2746                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2747                     vha->vp_idx);
2748                 return -EINVAL;
2749         }
2750
2751         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2752         if (sc != NULL) {
2753                 sc->cmd = cmd;
2754                 /* IRQ is already OFF */
2755                 spin_lock(&tgt->srr_lock);
2756                 sc->srr_id = tgt->ctio_srr_id;
2757                 list_add_tail(&sc->srr_list_entry,
2758                     &tgt->srr_ctio_list);
2759                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2760                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2761                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2762                         int found = 0;
2763                         list_for_each_entry(imm, &tgt->srr_imm_list,
2764                             srr_list_entry) {
2765                                 if (imm->srr_id == sc->srr_id) {
2766                                         found = 1;
2767                                         break;
2768                                 }
2769                         }
2770                         if (found) {
2771                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2772                                     "Scheduling srr work\n");
2773                                 schedule_work(&tgt->srr_work);
2774                         } else {
2775                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2776                                     "qla_target(%d): imm_srr_id "
2777                                     "== ctio_srr_id (%d), but there is no "
2778                                     "corresponding SRR IMM, deleting CTIO "
2779                                     "SRR %p\n", vha->vp_idx,
2780                                     tgt->ctio_srr_id, sc);
2781                                 list_del(&sc->srr_list_entry);
2782                                 spin_unlock(&tgt->srr_lock);
2783
2784                                 kfree(sc);
2785                                 return -EINVAL;
2786                         }
2787                 }
2788                 spin_unlock(&tgt->srr_lock);
2789         } else {
2790                 struct qla_tgt_srr_imm *ti;
2791
2792                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2793                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2794                     vha->vp_idx);
2795                 spin_lock(&tgt->srr_lock);
2796                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2797                     srr_list_entry) {
2798                         if (imm->srr_id == tgt->ctio_srr_id) {
2799                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2800                                     "IMM SRR %p deleted (id %d)\n",
2801                                     imm, imm->srr_id);
2802                                 list_del(&imm->srr_list_entry);
2803                                 qlt_reject_free_srr_imm(vha, imm, 1);
2804                         }
2805                 }
2806                 spin_unlock(&tgt->srr_lock);
2807
2808                 return -ENOMEM;
2809         }
2810
2811         return 0;
2812 }
2813
2814 /*
2815  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2816  */
2817 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2818         struct qla_tgt_cmd *cmd, uint32_t status)
2819 {
2820         int term = 0;
2821
2822         if (ctio != NULL) {
2823                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2824                 term = !(c->flags &
2825                     __constant_cpu_to_le16(OF_TERM_EXCH));
2826         } else
2827                 term = 1;
2828
2829         if (term)
2830                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2831
2832         return term;
2833 }
2834
2835 /* ha->hardware_lock supposed to be held on entry */
2836 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2837         uint32_t handle)
2838 {
2839         struct qla_hw_data *ha = vha->hw;
2840
2841         handle--;
2842         if (ha->tgt.cmds[handle] != NULL) {
2843                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2844                 ha->tgt.cmds[handle] = NULL;
2845                 return cmd;
2846         } else
2847                 return NULL;
2848 }
2849
2850 /* ha->hardware_lock supposed to be held on entry */
2851 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2852         uint32_t handle, void *ctio)
2853 {
2854         struct qla_tgt_cmd *cmd = NULL;
2855
2856         /* Clear out internal marks */
2857         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2858             CTIO_INTERMEDIATE_HANDLE_MARK);
2859
2860         if (handle != QLA_TGT_NULL_HANDLE) {
2861                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2862                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2863                             "SKIP_HANDLE CTIO\n");
2864                         return NULL;
2865                 }
2866                 /* handle-1 is actually used */
2867                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2868                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2869                             "qla_target(%d): Wrong handle %x received\n",
2870                             vha->vp_idx, handle);
2871                         return NULL;
2872                 }
2873                 cmd = qlt_get_cmd(vha, handle);
2874                 if (unlikely(cmd == NULL)) {
2875                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2876                             "qla_target(%d): Suspicious: unable to "
2877                             "find the command with handle %x\n", vha->vp_idx,
2878                             handle);
2879                         return NULL;
2880                 }
2881         } else if (ctio != NULL) {
2882                 /* We can't get loop ID from CTIO7 */
2883                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2884                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2885                     "support NULL handles\n", vha->vp_idx);
2886                 return NULL;
2887         }
2888
2889         return cmd;
2890 }
2891
2892 /*
2893  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2894  */
2895 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2896         uint32_t status, void *ctio)
2897 {
2898         struct qla_hw_data *ha = vha->hw;
2899         struct se_cmd *se_cmd;
2900         struct target_core_fabric_ops *tfo;
2901         struct qla_tgt_cmd *cmd;
2902
2903         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2904             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2905             vha->vp_idx, ctio, status, handle);
2906
2907         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2908                 /* That could happen only in case of an error/reset/abort */
2909                 if (status != CTIO_SUCCESS) {
2910                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2911                             "Intermediate CTIO received"
2912                             " (status %x)\n", status);
2913                 }
2914                 return;
2915         }
2916
2917         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2918         if (cmd == NULL)
2919                 return;
2920
2921         se_cmd = &cmd->se_cmd;
2922         tfo = se_cmd->se_tfo;
2923
2924         if (cmd->sg_mapped)
2925                 qlt_unmap_sg(vha, cmd);
2926
2927         if (unlikely(status != CTIO_SUCCESS)) {
2928                 switch (status & 0xFFFF) {
2929                 case CTIO_LIP_RESET:
2930                 case CTIO_TARGET_RESET:
2931                 case CTIO_ABORTED:
2932                         /* driver request abort via Terminate exchange */
2933                 case CTIO_TIMEOUT:
2934                 case CTIO_INVALID_RX_ID:
2935                         /* They are OK */
2936                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2937                             "qla_target(%d): CTIO with "
2938                             "status %#x received, state %x, se_cmd %p, "
2939                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2940                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2941                             status, cmd->state, se_cmd);
2942                         break;
2943
2944                 case CTIO_PORT_LOGGED_OUT:
2945                 case CTIO_PORT_UNAVAILABLE:
2946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2947                             "qla_target(%d): CTIO with PORT LOGGED "
2948                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2949                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2950                             status, cmd->state, se_cmd);
2951                         break;
2952
2953                 case CTIO_SRR_RECEIVED:
2954                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2955                             "qla_target(%d): CTIO with SRR_RECEIVED"
2956                             " status %x received (state %x, se_cmd %p)\n",
2957                             vha->vp_idx, status, cmd->state, se_cmd);
2958                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2959                                 break;
2960                         else
2961                                 return;
2962
2963                 case CTIO_DIF_ERROR: {
2964                         struct ctio_crc_from_fw *crc =
2965                                 (struct ctio_crc_from_fw *)ctio;
2966                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
2967                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
2968                             vha->vp_idx, status, cmd->state, se_cmd,
2969                             *((u64 *)&crc->actual_dif[0]),
2970                             *((u64 *)&crc->expected_dif[0]));
2971
2972                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
2973                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2974                                         /* scsi Write/xfer rdy complete */
2975                                         goto skip_term;
2976                                 } else {
2977                                         /* scsi read/xmit respond complete
2978                                          * call handle dif to send scsi status
2979                                          * rather than terminate exchange.
2980                                          */
2981                                         cmd->state = QLA_TGT_STATE_PROCESSED;
2982                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
2983                                         return;
2984                                 }
2985                         } else {
2986                                 /* Need to generate a SCSI good completion.
2987                                  * because FW did not send scsi status.
2988                                  */
2989                                 status = 0;
2990                                 goto skip_term;
2991                         }
2992                         break;
2993                 }
2994                 default:
2995                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2996                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
2997                             vha->vp_idx, status, cmd->state, se_cmd);
2998                         break;
2999                 }
3000
3001
3002                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3003                  * cmd is already aborted/terminated, we don't
3004                  * need to terminate again.  The exchange is already
3005                  * cleaned up/freed at FW level.  Just cleanup at driver
3006                  * level.
3007                  */
3008                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3009                         (cmd->state != QLA_TGT_STATE_ABORTED)) {
3010                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3011                                 return;
3012                 }
3013         }
3014 skip_term:
3015
3016         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3017                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
3018         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3019                 int rx_status = 0;
3020
3021                 cmd->state = QLA_TGT_STATE_DATA_IN;
3022
3023                 if (unlikely(status != CTIO_SUCCESS))
3024                         rx_status = -EIO;
3025                 else
3026                         cmd->write_data_transferred = 1;
3027
3028                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
3029                     "Data received, context %x, rx_status %d\n",
3030                     0x0, rx_status);
3031
3032                 ha->tgt.tgt_ops->handle_data(cmd);
3033                 return;
3034         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3035                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3036                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3037         } else {
3038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3039                     "qla_target(%d): A command in state (%d) should "
3040                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3041         }
3042
3043         if (unlikely(status != CTIO_SUCCESS) &&
3044                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3045                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3046                 dump_stack();
3047         }
3048
3049         ha->tgt.tgt_ops->free_cmd(cmd);
3050 }
3051
3052 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3053         uint8_t task_codes)
3054 {
3055         int fcp_task_attr;
3056
3057         switch (task_codes) {
3058         case ATIO_SIMPLE_QUEUE:
3059                 fcp_task_attr = MSG_SIMPLE_TAG;
3060                 break;
3061         case ATIO_HEAD_OF_QUEUE:
3062                 fcp_task_attr = MSG_HEAD_TAG;
3063                 break;
3064         case ATIO_ORDERED_QUEUE:
3065                 fcp_task_attr = MSG_ORDERED_TAG;
3066                 break;
3067         case ATIO_ACA_QUEUE:
3068                 fcp_task_attr = MSG_ACA_TAG;
3069                 break;
3070         case ATIO_UNTAGGED:
3071                 fcp_task_attr = MSG_SIMPLE_TAG;
3072                 break;
3073         default:
3074                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3075                     "qla_target: unknown task code %x, use ORDERED instead\n",
3076                     task_codes);
3077                 fcp_task_attr = MSG_ORDERED_TAG;
3078                 break;
3079         }
3080
3081         return fcp_task_attr;
3082 }
3083
3084 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3085                                         uint8_t *);
3086 /*
3087  * Process context for I/O path into tcm_qla2xxx code
3088  */
3089 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3090 {
3091         scsi_qla_host_t *vha = cmd->vha;
3092         struct qla_hw_data *ha = vha->hw;
3093         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3094         struct qla_tgt_sess *sess = cmd->sess;
3095         struct atio_from_isp *atio = &cmd->atio;
3096         unsigned char *cdb;
3097         unsigned long flags;
3098         uint32_t data_length;
3099         int ret, fcp_task_attr, data_dir, bidi = 0;
3100
3101         if (tgt->tgt_stop)
3102                 goto out_term;
3103
3104         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3105         cmd->tag = atio->u.isp24.exchange_addr;
3106         cmd->unpacked_lun = scsilun_to_int(
3107             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3108
3109         if (atio->u.isp24.fcp_cmnd.rddata &&
3110             atio->u.isp24.fcp_cmnd.wrdata) {
3111                 bidi = 1;
3112                 data_dir = DMA_TO_DEVICE;
3113         } else if (atio->u.isp24.fcp_cmnd.rddata)
3114                 data_dir = DMA_FROM_DEVICE;
3115         else if (atio->u.isp24.fcp_cmnd.wrdata)
3116                 data_dir = DMA_TO_DEVICE;
3117         else
3118                 data_dir = DMA_NONE;
3119
3120         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3121             atio->u.isp24.fcp_cmnd.task_attr);
3122         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3123             &atio->u.isp24.fcp_cmnd.add_cdb[
3124             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3125
3126         ql_dbg(ql_dbg_tgt, vha, 0xe022,
3127                 "qla_target: START qla cmd: %p se_cmd %p lun: 0x%04x (tag %d) len(%d) ox_id %x\n",
3128                 cmd, &cmd->se_cmd, cmd->unpacked_lun, cmd->tag, data_length,
3129                 cmd->atio.u.isp24.fcp_hdr.ox_id);
3130
3131         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3132                                           fcp_task_attr, data_dir, bidi);
3133         if (ret != 0)
3134                 goto out_term;
3135         /*
3136          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3137          */
3138         spin_lock_irqsave(&ha->hardware_lock, flags);
3139         ha->tgt.tgt_ops->put_sess(sess);
3140         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3141         return;
3142
3143 out_term:
3144         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
3145         /*
3146          * cmd has not sent to target yet, so pass NULL as the second
3147          * argument to qlt_send_term_exchange() and free the memory here.
3148          */
3149         spin_lock_irqsave(&ha->hardware_lock, flags);
3150         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3151         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3152         ha->tgt.tgt_ops->put_sess(sess);
3153         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3154 }
3155
3156 static void qlt_do_work(struct work_struct *work)
3157 {
3158         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3159
3160         __qlt_do_work(cmd);
3161 }
3162
3163 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3164                                        struct qla_tgt_sess *sess,
3165                                        struct atio_from_isp *atio)
3166 {
3167         struct se_session *se_sess = sess->se_sess;
3168         struct qla_tgt_cmd *cmd;
3169         int tag;
3170
3171         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3172         if (tag < 0)
3173                 return NULL;
3174
3175         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3176         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3177
3178         memcpy(&cmd->atio, atio, sizeof(*atio));
3179         cmd->state = QLA_TGT_STATE_NEW;
3180         cmd->tgt = vha->vha_tgt.qla_tgt;
3181         cmd->vha = vha;
3182         cmd->se_cmd.map_tag = tag;
3183         cmd->sess = sess;
3184         cmd->loop_id = sess->loop_id;
3185         cmd->conf_compl_supported = sess->conf_compl_supported;
3186
3187         return cmd;
3188 }
3189
3190 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3191                           uint16_t);
3192
3193 static void qlt_create_sess_from_atio(struct work_struct *work)
3194 {
3195         struct qla_tgt_sess_op *op = container_of(work,
3196                                         struct qla_tgt_sess_op, work);
3197         scsi_qla_host_t *vha = op->vha;
3198         struct qla_hw_data *ha = vha->hw;
3199         struct qla_tgt_sess *sess;
3200         struct qla_tgt_cmd *cmd;
3201         unsigned long flags;
3202         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3203
3204         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3205                 "qla_target(%d): Unable to find wwn login"
3206                 " (s_id %x:%x:%x), trying to create it manually\n",
3207                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3208
3209         if (op->atio.u.raw.entry_count > 1) {
3210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3211                         "Dropping multy entry atio %p\n", &op->atio);
3212                 goto out_term;
3213         }
3214
3215         mutex_lock(&vha->vha_tgt.tgt_mutex);
3216         sess = qlt_make_local_sess(vha, s_id);
3217         /* sess has an extra creation ref. */
3218         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3219
3220         if (!sess)
3221                 goto out_term;
3222         /*
3223          * Now obtain a pre-allocated session tag using the original op->atio
3224          * packet header, and dispatch into __qlt_do_work() using the existing
3225          * process context.
3226          */
3227         cmd = qlt_get_tag(vha, sess, &op->atio);
3228         if (!cmd) {
3229                 spin_lock_irqsave(&ha->hardware_lock, flags);
3230                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3231                 ha->tgt.tgt_ops->put_sess(sess);
3232                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3233                 kfree(op);
3234                 return;
3235         }
3236         /*
3237          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3238          * the extra reference taken above by qlt_make_local_sess()
3239          */
3240         __qlt_do_work(cmd);
3241         kfree(op);
3242         return;
3243
3244 out_term:
3245         spin_lock_irqsave(&ha->hardware_lock, flags);
3246         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3247         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3248         kfree(op);
3249
3250 }
3251
3252 /* ha->hardware_lock supposed to be held on entry */
3253 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3254         struct atio_from_isp *atio)
3255 {
3256         struct qla_hw_data *ha = vha->hw;
3257         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3258         struct qla_tgt_sess *sess;
3259         struct qla_tgt_cmd *cmd;
3260
3261         if (unlikely(tgt->tgt_stop)) {
3262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
3263                     "New command while device %p is shutting down\n", tgt);
3264                 return -EFAULT;
3265         }
3266
3267         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3268         if (unlikely(!sess)) {
3269                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3270                                                      GFP_ATOMIC);
3271                 if (!op)
3272                         return -ENOMEM;
3273
3274                 memcpy(&op->atio, atio, sizeof(*atio));
3275                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3276                 queue_work(qla_tgt_wq, &op->work);
3277                 return 0;
3278         }
3279         /*
3280          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3281          */
3282         kref_get(&sess->se_sess->sess_kref);
3283
3284         cmd = qlt_get_tag(vha, sess, atio);
3285         if (!cmd) {
3286                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
3287                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3288                 ha->tgt.tgt_ops->put_sess(sess);
3289                 return -ENOMEM;
3290         }
3291
3292         INIT_WORK(&cmd->work, qlt_do_work);
3293         queue_work(qla_tgt_wq, &cmd->work);
3294         return 0;
3295
3296 }
3297
3298 /* ha->hardware_lock supposed to be held on entry */
3299 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3300         int fn, void *iocb, int flags)
3301 {
3302         struct scsi_qla_host *vha = sess->vha;
3303         struct qla_hw_data *ha = vha->hw;
3304         struct qla_tgt_mgmt_cmd *mcmd;
3305         int res;
3306         uint8_t tmr_func;
3307
3308         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3309         if (!mcmd) {
3310                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3311                     "qla_target(%d): Allocation of management "
3312                     "command failed, some commands and their data could "
3313                     "leak\n", vha->vp_idx);
3314                 return -ENOMEM;
3315         }
3316         memset(mcmd, 0, sizeof(*mcmd));
3317         mcmd->sess = sess;
3318
3319         if (iocb) {
3320                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3321                     sizeof(mcmd->orig_iocb.imm_ntfy));
3322         }
3323         mcmd->tmr_func = fn;
3324         mcmd->flags = flags;
3325
3326         switch (fn) {
3327         case QLA_TGT_CLEAR_ACA:
3328                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3329                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3330                 tmr_func = TMR_CLEAR_ACA;
3331                 break;
3332
3333         case QLA_TGT_TARGET_RESET:
3334                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3335                     "qla_target(%d): TARGET_RESET received\n",
3336                     sess->vha->vp_idx);
3337                 tmr_func = TMR_TARGET_WARM_RESET;
3338                 break;
3339
3340         case QLA_TGT_LUN_RESET:
3341                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3342                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3343                 tmr_func = TMR_LUN_RESET;
3344                 break;
3345
3346         case QLA_TGT_CLEAR_TS:
3347                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3348                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3349                 tmr_func = TMR_CLEAR_TASK_SET;
3350                 break;
3351
3352         case QLA_TGT_ABORT_TS:
3353                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3354                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3355                 tmr_func = TMR_ABORT_TASK_SET;
3356                 break;
3357 #if 0
3358         case QLA_TGT_ABORT_ALL:
3359                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3360                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3361                     sess->vha->vp_idx);
3362                 tmr_func = 0;
3363                 break;
3364
3365         case QLA_TGT_ABORT_ALL_SESS:
3366                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3367                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3368                     sess->vha->vp_idx);
3369                 tmr_func = 0;
3370                 break;
3371
3372         case QLA_TGT_NEXUS_LOSS_SESS:
3373                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3374                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3375                     sess->vha->vp_idx);
3376                 tmr_func = 0;
3377                 break;
3378
3379         case QLA_TGT_NEXUS_LOSS:
3380                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3381                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3382                 tmr_func = 0;
3383                 break;
3384 #endif
3385         default:
3386                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3387                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3388                     sess->vha->vp_idx, fn);
3389                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3390                 return -ENOSYS;
3391         }
3392
3393         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3394         if (res != 0) {
3395                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3396                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3397                     sess->vha->vp_idx, res);
3398                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3399                 return -EFAULT;
3400         }
3401
3402         return 0;
3403 }
3404
3405 /* ha->hardware_lock supposed to be held on entry */
3406 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3407 {
3408         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3409         struct qla_hw_data *ha = vha->hw;
3410         struct qla_tgt *tgt;
3411         struct qla_tgt_sess *sess;
3412         uint32_t lun, unpacked_lun;
3413         int lun_size, fn;
3414
3415         tgt = vha->vha_tgt.qla_tgt;
3416
3417         lun = a->u.isp24.fcp_cmnd.lun;
3418         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3419         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3420         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3421             a->u.isp24.fcp_hdr.s_id);
3422         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3423
3424         if (!sess) {
3425                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3426                     "qla_target(%d): task mgmt fn 0x%x for "
3427                     "non-existant session\n", vha->vp_idx, fn);
3428                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3429                     sizeof(struct atio_from_isp));
3430         }
3431
3432         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3433 }
3434
3435 /* ha->hardware_lock supposed to be held on entry */
3436 static int __qlt_abort_task(struct scsi_qla_host *vha,
3437         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3438 {
3439         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3440         struct qla_hw_data *ha = vha->hw;
3441         struct qla_tgt_mgmt_cmd *mcmd;
3442         uint32_t lun, unpacked_lun;
3443         int rc;
3444
3445         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3446         if (mcmd == NULL) {
3447                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3448                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3449                     vha->vp_idx, __func__);
3450                 return -ENOMEM;
3451         }
3452         memset(mcmd, 0, sizeof(*mcmd));
3453
3454         mcmd->sess = sess;
3455         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3456             sizeof(mcmd->orig_iocb.imm_ntfy));
3457
3458         lun = a->u.isp24.fcp_cmnd.lun;
3459         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3460
3461         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3462             le16_to_cpu(iocb->u.isp2x.seq_id));
3463         if (rc != 0) {
3464                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3465                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3466                     vha->vp_idx, rc);
3467                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3468                 return -EFAULT;
3469         }
3470
3471         return 0;
3472 }
3473
3474 /* ha->hardware_lock supposed to be held on entry */
3475 static int qlt_abort_task(struct scsi_qla_host *vha,
3476         struct imm_ntfy_from_isp *iocb)
3477 {
3478         struct qla_hw_data *ha = vha->hw;
3479         struct qla_tgt_sess *sess;
3480         int loop_id;
3481
3482         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3483
3484         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3485         if (sess == NULL) {
3486                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3487                     "qla_target(%d): task abort for unexisting "
3488                     "session\n", vha->vp_idx);
3489                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3490                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3491         }
3492
3493         return __qlt_abort_task(vha, iocb, sess);
3494 }
3495
3496 /*
3497  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3498  */
3499 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3500         struct imm_ntfy_from_isp *iocb)
3501 {
3502         int res = 0;
3503
3504         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3505             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3506             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3507
3508         switch (iocb->u.isp24.status_subcode) {
3509         case ELS_PLOGI:
3510         case ELS_FLOGI:
3511         case ELS_PRLI:
3512         case ELS_LOGO:
3513         case ELS_PRLO:
3514                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3515                 break;
3516         case ELS_PDISC:
3517         case ELS_ADISC:
3518         {
3519                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3520                 if (tgt->link_reinit_iocb_pending) {
3521                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3522                             0, 0, 0, 0, 0, 0);
3523                         tgt->link_reinit_iocb_pending = 0;
3524                 }
3525                 res = 1; /* send notify ack */
3526                 break;
3527         }
3528
3529         default:
3530                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3531                     "qla_target(%d): Unsupported ELS command %x "
3532                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3533                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3534                 break;
3535         }
3536
3537         return res;
3538 }
3539
3540 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3541 {
3542         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3543         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3544         int i, sg_srr_cnt, bufflen = 0;
3545
3546         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3547             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3548             "cmd->sg_cnt: %u, direction: %d\n",
3549             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3550
3551         /*
3552          * FIXME: Reject non zero SRR relative offset until we can test
3553          * this code properly.
3554          */
3555         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3556         return -1;
3557
3558         if (!cmd->sg || !cmd->sg_cnt) {
3559                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3560                     "Missing cmd->sg or zero cmd->sg_cnt in"
3561                     " qla_tgt_set_data_offset\n");
3562                 return -EINVAL;
3563         }
3564         /*
3565          * Walk the current cmd->sg list until we locate the new sg_srr_start
3566          */
3567         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3568                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3569                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3570                     i, sg, sg_page(sg), sg->length, sg->offset);
3571
3572                 if ((sg->length + tmp) > offset) {
3573                         first_offset = rem_offset;
3574                         sg_srr_start = sg;
3575                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3576                             "Found matching sg[%d], using %p as sg_srr_start, "
3577                             "and using first_offset: %zu\n", i, sg,
3578                             first_offset);
3579                         break;
3580                 }
3581                 tmp += sg->length;
3582                 rem_offset -= sg->length;
3583         }
3584
3585         if (!sg_srr_start) {
3586                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3587                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3588                 return -EINVAL;
3589         }
3590         sg_srr_cnt = (cmd->sg_cnt - i);
3591
3592         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3593         if (!sg_srr) {
3594                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3595                     "Unable to allocate sgp\n");
3596                 return -ENOMEM;
3597         }
3598         sg_init_table(sg_srr, sg_srr_cnt);
3599         sgp = &sg_srr[0];
3600         /*
3601          * Walk the remaining list for sg_srr_start, mapping to the newly
3602          * allocated sg_srr taking first_offset into account.
3603          */
3604         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3605                 if (first_offset) {
3606                         sg_set_page(sgp, sg_page(sg),
3607                             (sg->length - first_offset), first_offset);
3608                         first_offset = 0;
3609                 } else {
3610                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3611                 }
3612                 bufflen += sgp->length;
3613
3614                 sgp = sg_next(sgp);
3615                 if (!sgp)
3616                         break;
3617         }
3618
3619         cmd->sg = sg_srr;
3620         cmd->sg_cnt = sg_srr_cnt;
3621         cmd->bufflen = bufflen;
3622         cmd->offset += offset;
3623         cmd->free_sg = 1;
3624
3625         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3626         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3627             cmd->sg_cnt);
3628         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3629             cmd->bufflen);
3630         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3631             cmd->offset);
3632
3633         if (cmd->sg_cnt < 0)
3634                 BUG();
3635
3636         if (cmd->bufflen < 0)
3637                 BUG();
3638
3639         return 0;
3640 }
3641
3642 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3643         uint32_t srr_rel_offs, int *xmit_type)
3644 {
3645         int res = 0, rel_offs;
3646
3647         rel_offs = srr_rel_offs - cmd->offset;
3648         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3649             srr_rel_offs, rel_offs);
3650
3651         *xmit_type = QLA_TGT_XMIT_ALL;
3652
3653         if (rel_offs < 0) {
3654                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3655                     "qla_target(%d): SRR rel_offs (%d) < 0",
3656                     cmd->vha->vp_idx, rel_offs);
3657                 res = -1;
3658         } else if (rel_offs == cmd->bufflen)
3659                 *xmit_type = QLA_TGT_XMIT_STATUS;
3660         else if (rel_offs > 0)
3661                 res = qlt_set_data_offset(cmd, rel_offs);
3662
3663         return res;
3664 }
3665
3666 /* No locks, thread context */
3667 static void qlt_handle_srr(struct scsi_qla_host *vha,
3668         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3669 {
3670         struct imm_ntfy_from_isp *ntfy =
3671             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3672         struct qla_hw_data *ha = vha->hw;
3673         struct qla_tgt_cmd *cmd = sctio->cmd;
3674         struct se_cmd *se_cmd = &cmd->se_cmd;
3675         unsigned long flags;
3676         int xmit_type = 0, resp = 0;
3677         uint32_t offset;
3678         uint16_t srr_ui;
3679
3680         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3681         srr_ui = ntfy->u.isp24.srr_ui;
3682
3683         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3684             cmd, srr_ui);
3685
3686         switch (srr_ui) {
3687         case SRR_IU_STATUS:
3688                 spin_lock_irqsave(&ha->hardware_lock, flags);
3689                 qlt_send_notify_ack(vha, ntfy,
3690                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3691                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3692                 xmit_type = QLA_TGT_XMIT_STATUS;
3693                 resp = 1;
3694                 break;
3695         case SRR_IU_DATA_IN:
3696                 if (!cmd->sg || !cmd->sg_cnt) {
3697                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3698                             "Unable to process SRR_IU_DATA_IN due to"
3699                             " missing cmd->sg, state: %d\n", cmd->state);
3700                         dump_stack();
3701                         goto out_reject;
3702                 }
3703                 if (se_cmd->scsi_status != 0) {
3704                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3705                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3706                             "scsi_status\n");
3707                         goto out_reject;
3708                 }
3709                 cmd->bufflen = se_cmd->data_length;
3710
3711                 if (qlt_has_data(cmd)) {
3712                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3713                                 goto out_reject;
3714                         spin_lock_irqsave(&ha->hardware_lock, flags);
3715                         qlt_send_notify_ack(vha, ntfy,
3716                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3717                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3718                         resp = 1;
3719                 } else {
3720                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3721                             "qla_target(%d): SRR for in data for cmd "
3722                             "without them (tag %d, SCSI status %d), "
3723                             "reject", vha->vp_idx, cmd->tag,
3724                             cmd->se_cmd.scsi_status);
3725                         goto out_reject;
3726                 }
3727                 break;
3728         case SRR_IU_DATA_OUT:
3729                 if (!cmd->sg || !cmd->sg_cnt) {
3730                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3731                             "Unable to process SRR_IU_DATA_OUT due to"
3732                             " missing cmd->sg\n");
3733                         dump_stack();
3734                         goto out_reject;
3735                 }
3736                 if (se_cmd->scsi_status != 0) {
3737                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3738                             "Rejecting SRR_IU_DATA_OUT"
3739                             " with non GOOD scsi_status\n");
3740                         goto out_reject;
3741                 }
3742                 cmd->bufflen = se_cmd->data_length;
3743
3744                 if (qlt_has_data(cmd)) {
3745                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3746                                 goto out_reject;
3747                         spin_lock_irqsave(&ha->hardware_lock, flags);
3748                         qlt_send_notify_ack(vha, ntfy,
3749                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3750                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3751                         if (xmit_type & QLA_TGT_XMIT_DATA)
3752                                 qlt_rdy_to_xfer(cmd);
3753                 } else {
3754                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3755                             "qla_target(%d): SRR for out data for cmd "
3756                             "without them (tag %d, SCSI status %d), "
3757                             "reject", vha->vp_idx, cmd->tag,
3758                             cmd->se_cmd.scsi_status);
3759                         goto out_reject;
3760                 }
3761                 break;
3762         default:
3763                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3764                     "qla_target(%d): Unknown srr_ui value %x",
3765                     vha->vp_idx, srr_ui);
3766                 goto out_reject;
3767         }
3768
3769         /* Transmit response in case of status and data-in cases */
3770         if (resp)
3771                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3772
3773         return;
3774
3775 out_reject:
3776         spin_lock_irqsave(&ha->hardware_lock, flags);
3777         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3778             NOTIFY_ACK_SRR_FLAGS_REJECT,
3779             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3780             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3781         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3782                 cmd->state = QLA_TGT_STATE_DATA_IN;
3783                 dump_stack();
3784         } else
3785                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3786         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3787 }
3788
3789 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3790         struct qla_tgt_srr_imm *imm, int ha_locked)
3791 {
3792         struct qla_hw_data *ha = vha->hw;
3793         unsigned long flags = 0;
3794
3795         if (!ha_locked)
3796                 spin_lock_irqsave(&ha->hardware_lock, flags);
3797
3798         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3799             NOTIFY_ACK_SRR_FLAGS_REJECT,
3800             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3801             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3802
3803         if (!ha_locked)
3804                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3805
3806         kfree(imm);
3807 }
3808
3809 static void qlt_handle_srr_work(struct work_struct *work)
3810 {
3811         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3812         struct scsi_qla_host *vha = tgt->vha;
3813         struct qla_tgt_srr_ctio *sctio;
3814         unsigned long flags;
3815
3816         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3817             tgt);
3818
3819 restart:
3820         spin_lock_irqsave(&tgt->srr_lock, flags);
3821         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3822                 struct qla_tgt_srr_imm *imm, *i, *ti;
3823                 struct qla_tgt_cmd *cmd;
3824                 struct se_cmd *se_cmd;
3825
3826                 imm = NULL;
3827                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3828                                                 srr_list_entry) {
3829                         if (i->srr_id == sctio->srr_id) {
3830                                 list_del(&i->srr_list_entry);
3831                                 if (imm) {
3832                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3833                                           "qla_target(%d): There must be "
3834                                           "only one IMM SRR per CTIO SRR "
3835                                           "(IMM SRR %p, id %d, CTIO %p\n",
3836                                           vha->vp_idx, i, i->srr_id, sctio);
3837                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3838                                 } else
3839                                         imm = i;
3840                         }
3841                 }
3842
3843                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3844                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3845                     sctio->srr_id);
3846
3847                 if (imm == NULL) {
3848                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3849                             "Not found matching IMM for SRR CTIO (id %d)\n",
3850                             sctio->srr_id);
3851                         continue;
3852                 } else
3853                         list_del(&sctio->srr_list_entry);
3854
3855                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3856
3857                 cmd = sctio->cmd;
3858                 /*
3859                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3860                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3861                  * logic..
3862                  */
3863                 cmd->offset = 0;
3864                 if (cmd->free_sg) {
3865                         kfree(cmd->sg);
3866                         cmd->sg = NULL;
3867                         cmd->free_sg = 0;
3868                 }
3869                 se_cmd = &cmd->se_cmd;
3870
3871                 cmd->sg_cnt = se_cmd->t_data_nents;
3872                 cmd->sg = se_cmd->t_data_sg;
3873
3874                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3875                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3876                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3877                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
3878                     cmd->sg_cnt, cmd->offset);
3879
3880                 qlt_handle_srr(vha, sctio, imm);
3881
3882                 kfree(imm);
3883                 kfree(sctio);
3884                 goto restart;
3885         }
3886         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3887 }
3888
3889 /* ha->hardware_lock supposed to be held on entry */
3890 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3891         struct imm_ntfy_from_isp *iocb)
3892 {
3893         struct qla_tgt_srr_imm *imm;
3894         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3895         struct qla_tgt_srr_ctio *sctio;
3896
3897         tgt->imm_srr_id++;
3898
3899         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3900             vha->vp_idx);
3901
3902         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3903         if (imm != NULL) {
3904                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3905
3906                 /* IRQ is already OFF */
3907                 spin_lock(&tgt->srr_lock);
3908                 imm->srr_id = tgt->imm_srr_id;
3909                 list_add_tail(&imm->srr_list_entry,
3910                     &tgt->srr_imm_list);
3911                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3912                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3913                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3914                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3915                         int found = 0;
3916                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3917                             srr_list_entry) {
3918                                 if (sctio->srr_id == imm->srr_id) {
3919                                         found = 1;
3920                                         break;
3921                                 }
3922                         }
3923                         if (found) {
3924                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3925                                     "Scheduling srr work\n");
3926                                 schedule_work(&tgt->srr_work);
3927                         } else {
3928                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3929                                     "qla_target(%d): imm_srr_id "
3930                                     "== ctio_srr_id (%d), but there is no "
3931                                     "corresponding SRR CTIO, deleting IMM "
3932                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3933                                     imm);
3934                                 list_del(&imm->srr_list_entry);
3935
3936                                 kfree(imm);
3937
3938                                 spin_unlock(&tgt->srr_lock);
3939                                 goto out_reject;
3940                         }
3941                 }
3942                 spin_unlock(&tgt->srr_lock);
3943         } else {
3944                 struct qla_tgt_srr_ctio *ts;
3945
3946                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3947                     "qla_target(%d): Unable to allocate SRR IMM "
3948                     "entry, SRR request will be rejected\n", vha->vp_idx);
3949
3950                 /* IRQ is already OFF */
3951                 spin_lock(&tgt->srr_lock);
3952                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3953                     srr_list_entry) {
3954                         if (sctio->srr_id == tgt->imm_srr_id) {
3955                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3956                                     "CTIO SRR %p deleted (id %d)\n",
3957                                     sctio, sctio->srr_id);
3958                                 list_del(&sctio->srr_list_entry);
3959                                 qlt_send_term_exchange(vha, sctio->cmd,
3960                                     &sctio->cmd->atio, 1);
3961                                 kfree(sctio);
3962                         }
3963                 }
3964                 spin_unlock(&tgt->srr_lock);
3965                 goto out_reject;
3966         }
3967
3968         return;
3969
3970 out_reject:
3971         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3972             NOTIFY_ACK_SRR_FLAGS_REJECT,
3973             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3974             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3975 }
3976
3977 /*
3978  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3979  */
3980 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3981         struct imm_ntfy_from_isp *iocb)
3982 {
3983         struct qla_hw_data *ha = vha->hw;
3984         uint32_t add_flags = 0;
3985         int send_notify_ack = 1;
3986         uint16_t status;
3987
3988         status = le16_to_cpu(iocb->u.isp2x.status);
3989         switch (status) {
3990         case IMM_NTFY_LIP_RESET:
3991         {
3992                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3993                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3994                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3995                     iocb->u.isp24.status_subcode);
3996
3997                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3998                         send_notify_ack = 0;
3999                 break;
4000         }
4001
4002         case IMM_NTFY_LIP_LINK_REINIT:
4003         {
4004                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4005                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4006                     "qla_target(%d): LINK REINIT (loop %#x, "
4007                     "subcode %x)\n", vha->vp_idx,
4008                     le16_to_cpu(iocb->u.isp24.nport_handle),
4009                     iocb->u.isp24.status_subcode);
4010                 if (tgt->link_reinit_iocb_pending) {
4011                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4012                             0, 0, 0, 0, 0, 0);
4013                 }
4014                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4015                 tgt->link_reinit_iocb_pending = 1;
4016                 /*
4017                  * QLogic requires to wait after LINK REINIT for possible
4018                  * PDISC or ADISC ELS commands
4019                  */
4020                 send_notify_ack = 0;
4021                 break;
4022         }
4023
4024         case IMM_NTFY_PORT_LOGOUT:
4025                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4026                     "qla_target(%d): Port logout (loop "
4027                     "%#x, subcode %x)\n", vha->vp_idx,
4028                     le16_to_cpu(iocb->u.isp24.nport_handle),
4029                     iocb->u.isp24.status_subcode);
4030
4031                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4032                         send_notify_ack = 0;
4033                 /* The sessions will be cleared in the callback, if needed */
4034                 break;
4035
4036         case IMM_NTFY_GLBL_TPRLO:
4037                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4038                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4039                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4040                         send_notify_ack = 0;
4041                 /* The sessions will be cleared in the callback, if needed */
4042                 break;
4043
4044         case IMM_NTFY_PORT_CONFIG:
4045                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4046                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4047                     status);
4048                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4049                         send_notify_ack = 0;
4050                 /* The sessions will be cleared in the callback, if needed */
4051                 break;
4052
4053         case IMM_NTFY_GLBL_LOGO:
4054                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4055                     "qla_target(%d): Link failure detected\n",
4056                     vha->vp_idx);
4057                 /* I_T nexus loss */
4058                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4059                         send_notify_ack = 0;
4060                 break;
4061
4062         case IMM_NTFY_IOCB_OVERFLOW:
4063                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4064                     "qla_target(%d): Cannot provide requested "
4065                     "capability (IOCB overflowed the immediate notify "
4066                     "resource count)\n", vha->vp_idx);
4067                 break;
4068
4069         case IMM_NTFY_ABORT_TASK:
4070                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4071                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4072                     "L %#x)\n", vha->vp_idx,
4073                     le16_to_cpu(iocb->u.isp2x.seq_id),
4074                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4075                     le16_to_cpu(iocb->u.isp2x.lun));
4076                 if (qlt_abort_task(vha, iocb) == 0)
4077                         send_notify_ack = 0;
4078                 break;
4079
4080         case IMM_NTFY_RESOURCE:
4081                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4082                     "qla_target(%d): Out of resources, host %ld\n",
4083                     vha->vp_idx, vha->host_no);
4084                 break;
4085
4086         case IMM_NTFY_MSG_RX:
4087                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4088                     "qla_target(%d): Immediate notify task %x\n",
4089                     vha->vp_idx, iocb->u.isp2x.task_flags);
4090                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4091                         send_notify_ack = 0;
4092                 break;
4093
4094         case IMM_NTFY_ELS:
4095                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4096                         send_notify_ack = 0;
4097                 break;
4098
4099         case IMM_NTFY_SRR:
4100                 qlt_prepare_srr_imm(vha, iocb);
4101                 send_notify_ack = 0;
4102                 break;
4103
4104         default:
4105                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4106                     "qla_target(%d): Received unknown immediate "
4107                     "notify status %x\n", vha->vp_idx, status);
4108                 break;
4109         }
4110
4111         if (send_notify_ack)
4112                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4113 }
4114
4115 /*
4116  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4117  * This function sends busy to ISP 2xxx or 24xx.
4118  */
4119 static void qlt_send_busy(struct scsi_qla_host *vha,
4120         struct atio_from_isp *atio, uint16_t status)
4121 {
4122         struct ctio7_to_24xx *ctio24;
4123         struct qla_hw_data *ha = vha->hw;
4124         request_t *pkt;
4125         struct qla_tgt_sess *sess = NULL;
4126
4127         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4128             atio->u.isp24.fcp_hdr.s_id);
4129         if (!sess) {
4130                 qlt_send_term_exchange(vha, NULL, atio, 1);
4131                 return;
4132         }
4133         /* Sending marker isn't necessary, since we called from ISR */
4134
4135         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4136         if (!pkt) {
4137                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
4138                     "qla_target(%d): %s failed: unable to allocate "
4139                     "request packet", vha->vp_idx, __func__);
4140                 return;
4141         }
4142
4143         pkt->entry_count = 1;
4144         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4145
4146         ctio24 = (struct ctio7_to_24xx *)pkt;
4147         ctio24->entry_type = CTIO_TYPE7;
4148         ctio24->nport_handle = sess->loop_id;
4149         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4150         ctio24->vp_index = vha->vp_idx;
4151         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4152         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4153         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4154         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4155         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4156             __constant_cpu_to_le16(
4157                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4158                 CTIO7_FLAGS_DONT_RET_CTIO);
4159         /*
4160          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4161          * if the explicit conformation is used.
4162          */
4163         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4164         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4165         ctio24->u.status1.residual = get_unaligned((uint32_t *)
4166             &atio->u.isp24.fcp_cmnd.add_cdb[
4167             atio->u.isp24.fcp_cmnd.add_cdb_len]);
4168         if (ctio24->u.status1.residual != 0)
4169                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
4170
4171         qla2x00_start_iocbs(vha, vha->req);
4172 }
4173
4174 /* ha->hardware_lock supposed to be held on entry */
4175 /* called via callback from qla2xxx */
4176 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4177         struct atio_from_isp *atio)
4178 {
4179         struct qla_hw_data *ha = vha->hw;
4180         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4181         int rc;
4182
4183         if (unlikely(tgt == NULL)) {
4184                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
4185                     "ATIO pkt, but no tgt (ha %p)", ha);
4186                 return;
4187         }
4188         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
4189             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
4190             vha->vp_idx, atio, atio->u.raw.entry_type,
4191             atio->u.raw.entry_count);
4192         /*
4193          * In tgt_stop mode we also should allow all requests to pass.
4194          * Otherwise, some commands can stuck.
4195          */
4196
4197         tgt->irq_cmd_count++;
4198
4199         switch (atio->u.raw.entry_type) {
4200         case ATIO_TYPE7:
4201                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
4202                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, cdb %x, add_cdb_len %x, data_length %04x, s_id %02x%02x%02x\n",
4203                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
4204                     atio->u.isp24.fcp_cmnd.rddata,
4205                     atio->u.isp24.fcp_cmnd.wrdata,
4206                     atio->u.isp24.fcp_cmnd.cdb[0],
4207                     atio->u.isp24.fcp_cmnd.add_cdb_len,
4208                     be32_to_cpu(get_unaligned((uint32_t *)
4209                         &atio->u.isp24.fcp_cmnd.add_cdb[
4210                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
4211                     atio->u.isp24.fcp_hdr.s_id[0],
4212                     atio->u.isp24.fcp_hdr.s_id[1],
4213                     atio->u.isp24.fcp_hdr.s_id[2]);
4214
4215                 if (unlikely(atio->u.isp24.exchange_addr ==
4216                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4217                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
4218                             "qla_target(%d): ATIO_TYPE7 "
4219                             "received with UNKNOWN exchange address, "
4220                             "sending QUEUE_FULL\n", vha->vp_idx);
4221                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4222                         break;
4223                 }
4224                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
4225                         rc = qlt_handle_cmd_for_atio(vha, atio);
4226                 else
4227                         rc = qlt_handle_task_mgmt(vha, atio);
4228                 if (unlikely(rc != 0)) {
4229                         if (rc == -ESRCH) {
4230 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4231                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4232 #else
4233                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4234 #endif
4235                         } else {
4236                                 if (tgt->tgt_stop) {
4237                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4238                                             "qla_target: Unable to send "
4239                                             "command to target for req, "
4240                                             "ignoring.\n");
4241                                 } else {
4242                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4243                                             "qla_target(%d): Unable to send "
4244                                             "command to target, sending BUSY "
4245                                             "status.\n", vha->vp_idx);
4246                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4247                                 }
4248                         }
4249                 }
4250                 break;
4251
4252         case IMMED_NOTIFY_TYPE:
4253         {
4254                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4255                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4256                             "qla_target(%d): Received ATIO packet %x "
4257                             "with error status %x\n", vha->vp_idx,
4258                             atio->u.raw.entry_type,
4259                             atio->u.isp2x.entry_status);
4260                         break;
4261                 }
4262                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4263                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4264                 break;
4265         }
4266
4267         default:
4268                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4269                     "qla_target(%d): Received unknown ATIO atio "
4270                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4271                 break;
4272         }
4273
4274         tgt->irq_cmd_count--;
4275 }
4276
4277 /* ha->hardware_lock supposed to be held on entry */
4278 /* called via callback from qla2xxx */
4279 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4280 {
4281         struct qla_hw_data *ha = vha->hw;
4282         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4283
4284         if (unlikely(tgt == NULL)) {
4285                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4286                     "qla_target(%d): Response pkt %x received, but no "
4287                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4288                 return;
4289         }
4290
4291         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
4292             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
4293             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
4294             pkt->entry_count, pkt->entry_status, pkt->handle);
4295
4296         /*
4297          * In tgt_stop mode we also should allow all requests to pass.
4298          * Otherwise, some commands can stuck.
4299          */
4300
4301         tgt->irq_cmd_count++;
4302
4303         switch (pkt->entry_type) {
4304         case CTIO_CRC2:
4305         case CTIO_TYPE7:
4306         {
4307                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4308                 ql_dbg(ql_dbg_tgt, vha, 0xe030,
4309                         "CTIO[0x%x] 12/CTIO7 7A/CRC2: instance %d\n",
4310                         entry->entry_type, vha->vp_idx);
4311                 qlt_do_ctio_completion(vha, entry->handle,
4312                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4313                     entry);
4314                 break;
4315         }
4316
4317         case ACCEPT_TGT_IO_TYPE:
4318         {
4319                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4320                 int rc;
4321                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
4322                     "ACCEPT_TGT_IO instance %d status %04x "
4323                     "lun %04x read/write %d data_length %04x "
4324                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
4325                     le16_to_cpu(atio->u.isp2x.status),
4326                     le16_to_cpu(atio->u.isp2x.lun),
4327                     atio->u.isp2x.execution_codes,
4328                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
4329                     atio), atio->u.isp2x.rx_id);
4330                 if (atio->u.isp2x.status !=
4331                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4332                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4333                             "qla_target(%d): ATIO with error "
4334                             "status %x received\n", vha->vp_idx,
4335                             le16_to_cpu(atio->u.isp2x.status));
4336                         break;
4337                 }
4338                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
4339                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
4340                     atio->u.isp2x.cdb[0], (unsigned long
4341                     int)sizeof(atio->u.isp2x.cdb));
4342
4343                 rc = qlt_handle_cmd_for_atio(vha, atio);
4344                 if (unlikely(rc != 0)) {
4345                         if (rc == -ESRCH) {
4346 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4347                                 qlt_send_busy(vha, atio, 0);
4348 #else
4349                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4350 #endif
4351                         } else {
4352                                 if (tgt->tgt_stop) {
4353                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4354                                             "qla_target: Unable to send "
4355                                             "command to target, sending TERM "
4356                                             "EXCHANGE for rsp\n");
4357                                         qlt_send_term_exchange(vha, NULL,
4358                                             atio, 1);
4359                                 } else {
4360                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4361                                             "qla_target(%d): Unable to send "
4362                                             "command to target, sending BUSY "
4363                                             "status\n", vha->vp_idx);
4364                                         qlt_send_busy(vha, atio, 0);
4365                                 }
4366                         }
4367                 }
4368         }
4369         break;
4370
4371         case CONTINUE_TGT_IO_TYPE:
4372         {
4373                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4374                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
4375                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
4376                 qlt_do_ctio_completion(vha, entry->handle,
4377                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4378                     entry);
4379                 break;
4380         }
4381
4382         case CTIO_A64_TYPE:
4383         {
4384                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4385                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
4386                     vha->vp_idx);
4387                 qlt_do_ctio_completion(vha, entry->handle,
4388                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4389                     entry);
4390                 break;
4391         }
4392
4393         case IMMED_NOTIFY_TYPE:
4394                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4395                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4396                 break;
4397
4398         case NOTIFY_ACK_TYPE:
4399                 if (tgt->notify_ack_expected > 0) {
4400                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4401                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4402                             "NOTIFY_ACK seq %08x status %x\n",
4403                             le16_to_cpu(entry->u.isp2x.seq_id),
4404                             le16_to_cpu(entry->u.isp2x.status));
4405                         tgt->notify_ack_expected--;
4406                         if (entry->u.isp2x.status !=
4407                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4408                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4409                                     "qla_target(%d): NOTIFY_ACK "
4410                                     "failed %x\n", vha->vp_idx,
4411                                     le16_to_cpu(entry->u.isp2x.status));
4412                         }
4413                 } else {
4414                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4415                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4416                             vha->vp_idx);
4417                 }
4418                 break;
4419
4420         case ABTS_RECV_24XX:
4421                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4422                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4423                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4424                 break;
4425
4426         case ABTS_RESP_24XX:
4427                 if (tgt->abts_resp_expected > 0) {
4428                         struct abts_resp_from_24xx_fw *entry =
4429                                 (struct abts_resp_from_24xx_fw *)pkt;
4430                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4431                             "ABTS_RESP_24XX: compl_status %x\n",
4432                             entry->compl_status);
4433                         tgt->abts_resp_expected--;
4434                         if (le16_to_cpu(entry->compl_status) !=
4435                             ABTS_RESP_COMPL_SUCCESS) {
4436                                 if ((entry->error_subcode1 == 0x1E) &&
4437                                     (entry->error_subcode2 == 0)) {
4438                                         /*
4439                                          * We've got a race here: aborted
4440                                          * exchange not terminated, i.e.
4441                                          * response for the aborted command was
4442                                          * sent between the abort request was
4443                                          * received and processed.
4444                                          * Unfortunately, the firmware has a
4445                                          * silly requirement that all aborted
4446                                          * exchanges must be explicitely
4447                                          * terminated, otherwise it refuses to
4448                                          * send responses for the abort
4449                                          * requests. So, we have to
4450                                          * (re)terminate the exchange and retry
4451                                          * the abort response.
4452                                          */
4453                                         qlt_24xx_retry_term_exchange(vha,
4454                                             entry);
4455                                 } else
4456                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4457                                             "qla_target(%d): ABTS_RESP_24XX "
4458                                             "failed %x (subcode %x:%x)",
4459                                             vha->vp_idx, entry->compl_status,
4460                                             entry->error_subcode1,
4461                                             entry->error_subcode2);
4462                         }
4463                 } else {
4464                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4465                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4466                             "received\n", vha->vp_idx);
4467                 }
4468                 break;
4469
4470         default:
4471                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4472                     "qla_target(%d): Received unknown response pkt "
4473                     "type %x\n", vha->vp_idx, pkt->entry_type);
4474                 break;
4475         }
4476
4477         tgt->irq_cmd_count--;
4478 }
4479
4480 /*
4481  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4482  */
4483 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4484         uint16_t *mailbox)
4485 {
4486         struct qla_hw_data *ha = vha->hw;
4487         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4488         int login_code;
4489
4490         ql_dbg(ql_dbg_tgt, vha, 0xe039,
4491             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
4492             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
4493             ha->operating_mode, ha->current_topology);
4494
4495         if (!ha->tgt.tgt_ops)
4496                 return;
4497
4498         if (unlikely(tgt == NULL)) {
4499                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4500                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4501                 return;
4502         }
4503
4504         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4505             IS_QLA2100(ha))
4506                 return;
4507         /*
4508          * In tgt_stop mode we also should allow all requests to pass.
4509          * Otherwise, some commands can stuck.
4510          */
4511
4512         tgt->irq_cmd_count++;
4513
4514         switch (code) {
4515         case MBA_RESET:                 /* Reset */
4516         case MBA_SYSTEM_ERR:            /* System Error */
4517         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4518         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4519                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4520                     "qla_target(%d): System error async event %#x "
4521                     "occurred", vha->vp_idx, code);
4522                 break;
4523         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4524                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4525                 break;
4526
4527         case MBA_LOOP_UP:
4528         {
4529                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4530                     "qla_target(%d): Async LOOP_UP occurred "
4531                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4532                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4533                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4534                 if (tgt->link_reinit_iocb_pending) {
4535                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4536                             0, 0, 0, 0, 0, 0);
4537                         tgt->link_reinit_iocb_pending = 0;
4538                 }
4539                 break;
4540         }
4541
4542         case MBA_LIP_OCCURRED:
4543         case MBA_LOOP_DOWN:
4544         case MBA_LIP_RESET:
4545         case MBA_RSCN_UPDATE:
4546                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4547                     "qla_target(%d): Async event %#x occurred "
4548                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4549                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4550                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4551                 break;
4552
4553         case MBA_PORT_UPDATE:
4554                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4555                     "qla_target(%d): Port update async event %#x "
4556                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4557                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4558                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4559                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4560
4561                 login_code = le16_to_cpu(mailbox[2]);
4562                 if (login_code == 0x4)
4563                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4564                             "Async MB 2: Got PLOGI Complete\n");
4565                 else if (login_code == 0x7)
4566                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4567                             "Async MB 2: Port Logged Out\n");
4568                 break;
4569
4570         default:
4571                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4572                     "qla_target(%d): Async event %#x occurred: "
4573                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4574                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4575                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4576                 break;
4577         }
4578
4579         tgt->irq_cmd_count--;
4580 }
4581
4582 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4583         uint16_t loop_id)
4584 {
4585         fc_port_t *fcport;
4586         int rc;
4587
4588         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4589         if (!fcport) {
4590                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4591                     "qla_target(%d): Allocation of tmp FC port failed",
4592                     vha->vp_idx);
4593                 return NULL;
4594         }
4595
4596         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4597
4598         fcport->loop_id = loop_id;
4599
4600         rc = qla2x00_get_port_database(vha, fcport, 0);
4601         if (rc != QLA_SUCCESS) {
4602                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4603                     "qla_target(%d): Failed to retrieve fcport "
4604                     "information -- get_port_database() returned %x "
4605                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4606                 kfree(fcport);
4607                 return NULL;
4608         }
4609
4610         return fcport;
4611 }
4612
4613 /* Must be called under tgt_mutex */
4614 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4615         uint8_t *s_id)
4616 {
4617         struct qla_tgt_sess *sess = NULL;
4618         fc_port_t *fcport = NULL;
4619         int rc, global_resets;
4620         uint16_t loop_id = 0;
4621
4622 retry:
4623         global_resets =
4624             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4625
4626         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4627         if (rc != 0) {
4628                 if ((s_id[0] == 0xFF) &&
4629                     (s_id[1] == 0xFC)) {
4630                         /*
4631                          * This is Domain Controller, so it should be
4632                          * OK to drop SCSI commands from it.
4633                          */
4634                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4635                             "Unable to find initiator with S_ID %x:%x:%x",
4636                             s_id[0], s_id[1], s_id[2]);
4637                 } else
4638                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4639                             "qla_target(%d): Unable to find "
4640                             "initiator with S_ID %x:%x:%x",
4641                             vha->vp_idx, s_id[0], s_id[1],
4642                             s_id[2]);
4643                 return NULL;
4644         }
4645
4646         fcport = qlt_get_port_database(vha, loop_id);
4647         if (!fcport)
4648                 return NULL;
4649
4650         if (global_resets !=
4651             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4652                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4653                     "qla_target(%d): global reset during session discovery "
4654                     "(counter was %d, new %d), retrying", vha->vp_idx,
4655                     global_resets,
4656                     atomic_read(&vha->vha_tgt.
4657                         qla_tgt->tgt_global_resets_count));
4658                 goto retry;
4659         }
4660
4661         sess = qlt_create_sess(vha, fcport, true);
4662
4663         kfree(fcport);
4664         return sess;
4665 }
4666
4667 static void qlt_abort_work(struct qla_tgt *tgt,
4668         struct qla_tgt_sess_work_param *prm)
4669 {
4670         struct scsi_qla_host *vha = tgt->vha;
4671         struct qla_hw_data *ha = vha->hw;
4672         struct qla_tgt_sess *sess = NULL;
4673         unsigned long flags;
4674         uint32_t be_s_id;
4675         uint8_t s_id[3];
4676         int rc;
4677
4678         spin_lock_irqsave(&ha->hardware_lock, flags);
4679
4680         if (tgt->tgt_stop)
4681                 goto out_term;
4682
4683         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4684         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4685         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4686
4687         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4688             (unsigned char *)&be_s_id);
4689         if (!sess) {
4690                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4691
4692                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4693                 sess = qlt_make_local_sess(vha, s_id);
4694                 /* sess has got an extra creation ref */
4695                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4696
4697                 spin_lock_irqsave(&ha->hardware_lock, flags);
4698                 if (!sess)
4699                         goto out_term;
4700         } else {
4701                 kref_get(&sess->se_sess->sess_kref);
4702         }
4703
4704         if (tgt->tgt_stop)
4705                 goto out_term;
4706
4707         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4708         if (rc != 0)
4709                 goto out_term;
4710
4711         ha->tgt.tgt_ops->put_sess(sess);
4712         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4713         return;
4714
4715 out_term:
4716         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4717         if (sess)
4718                 ha->tgt.tgt_ops->put_sess(sess);
4719         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4720 }
4721
4722 static void qlt_tmr_work(struct qla_tgt *tgt,
4723         struct qla_tgt_sess_work_param *prm)
4724 {
4725         struct atio_from_isp *a = &prm->tm_iocb2;
4726         struct scsi_qla_host *vha = tgt->vha;
4727         struct qla_hw_data *ha = vha->hw;
4728         struct qla_tgt_sess *sess = NULL;
4729         unsigned long flags;
4730         uint8_t *s_id = NULL; /* to hide compiler warnings */
4731         int rc;
4732         uint32_t lun, unpacked_lun;
4733         int lun_size, fn;
4734         void *iocb;
4735
4736         spin_lock_irqsave(&ha->hardware_lock, flags);
4737
4738         if (tgt->tgt_stop)
4739                 goto out_term;
4740
4741         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4742         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4743         if (!sess) {
4744                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4745
4746                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4747                 sess = qlt_make_local_sess(vha, s_id);
4748                 /* sess has got an extra creation ref */
4749                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4750
4751                 spin_lock_irqsave(&ha->hardware_lock, flags);
4752                 if (!sess)
4753                         goto out_term;
4754         } else {
4755                 kref_get(&sess->se_sess->sess_kref);
4756         }
4757
4758         iocb = a;
4759         lun = a->u.isp24.fcp_cmnd.lun;
4760         lun_size = sizeof(lun);
4761         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4762         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4763
4764         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4765         if (rc != 0)
4766                 goto out_term;
4767
4768         ha->tgt.tgt_ops->put_sess(sess);
4769         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4770         return;
4771
4772 out_term:
4773         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4774         if (sess)
4775                 ha->tgt.tgt_ops->put_sess(sess);
4776         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4777 }
4778
4779 static void qlt_sess_work_fn(struct work_struct *work)
4780 {
4781         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4782         struct scsi_qla_host *vha = tgt->vha;
4783         unsigned long flags;
4784
4785         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4786
4787         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4788         while (!list_empty(&tgt->sess_works_list)) {
4789                 struct qla_tgt_sess_work_param *prm = list_entry(
4790                     tgt->sess_works_list.next, typeof(*prm),
4791                     sess_works_list_entry);
4792
4793                 /*
4794                  * This work can be scheduled on several CPUs at time, so we
4795                  * must delete the entry to eliminate double processing
4796                  */
4797                 list_del(&prm->sess_works_list_entry);
4798
4799                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4800
4801                 switch (prm->type) {
4802                 case QLA_TGT_SESS_WORK_ABORT:
4803                         qlt_abort_work(tgt, prm);
4804                         break;
4805                 case QLA_TGT_SESS_WORK_TM:
4806                         qlt_tmr_work(tgt, prm);
4807                         break;
4808                 default:
4809                         BUG_ON(1);
4810                         break;
4811                 }
4812
4813                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4814
4815                 kfree(prm);
4816         }
4817         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4818 }
4819
4820 /* Must be called under tgt_host_action_mutex */
4821 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4822 {
4823         struct qla_tgt *tgt;
4824
4825         if (!QLA_TGT_MODE_ENABLED())
4826                 return 0;
4827
4828         if (!IS_TGT_MODE_CAPABLE(ha)) {
4829                 ql_log(ql_log_warn, base_vha, 0xe070,
4830                     "This adapter does not support target mode.\n");
4831                 return 0;
4832         }
4833
4834         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4835             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4836
4837         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4838
4839         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4840         if (!tgt) {
4841                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4842                     "Unable to allocate struct qla_tgt\n");
4843                 return -ENOMEM;
4844         }
4845
4846         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4847                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4848
4849         tgt->ha = ha;
4850         tgt->vha = base_vha;
4851         init_waitqueue_head(&tgt->waitQ);
4852         INIT_LIST_HEAD(&tgt->sess_list);
4853         INIT_LIST_HEAD(&tgt->del_sess_list);
4854         INIT_DELAYED_WORK(&tgt->sess_del_work,
4855                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4856         spin_lock_init(&tgt->sess_work_lock);
4857         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4858         INIT_LIST_HEAD(&tgt->sess_works_list);
4859         spin_lock_init(&tgt->srr_lock);
4860         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4861         INIT_LIST_HEAD(&tgt->srr_imm_list);
4862         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4863         atomic_set(&tgt->tgt_global_resets_count, 0);
4864
4865         base_vha->vha_tgt.qla_tgt = tgt;
4866
4867         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4868                 "qla_target(%d): using 64 Bit PCI addressing",
4869                 base_vha->vp_idx);
4870         tgt->tgt_enable_64bit_addr = 1;
4871         /* 3 is reserved */
4872         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4873         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4874         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4875
4876         if (base_vha->fc_vport)
4877                 return 0;
4878
4879         mutex_lock(&qla_tgt_mutex);
4880         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4881         mutex_unlock(&qla_tgt_mutex);
4882
4883         return 0;
4884 }
4885
4886 /* Must be called under tgt_host_action_mutex */
4887 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4888 {
4889         if (!vha->vha_tgt.qla_tgt)
4890                 return 0;
4891
4892         if (vha->fc_vport) {
4893                 qlt_release(vha->vha_tgt.qla_tgt);
4894                 return 0;
4895         }
4896         mutex_lock(&qla_tgt_mutex);
4897         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4898         mutex_unlock(&qla_tgt_mutex);
4899
4900         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4901             vha->host_no, ha);
4902         qlt_release(vha->vha_tgt.qla_tgt);
4903
4904         return 0;
4905 }
4906
4907 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4908         unsigned char *b)
4909 {
4910         int i;
4911
4912         pr_debug("qla2xxx HW vha->node_name: ");
4913         for (i = 0; i < WWN_SIZE; i++)
4914                 pr_debug("%02x ", vha->node_name[i]);
4915         pr_debug("\n");
4916         pr_debug("qla2xxx HW vha->port_name: ");
4917         for (i = 0; i < WWN_SIZE; i++)
4918                 pr_debug("%02x ", vha->port_name[i]);
4919         pr_debug("\n");
4920
4921         pr_debug("qla2xxx passed configfs WWPN: ");
4922         put_unaligned_be64(wwpn, b);
4923         for (i = 0; i < WWN_SIZE; i++)
4924                 pr_debug("%02x ", b[i]);
4925         pr_debug("\n");
4926 }
4927
4928 /**
4929  * qla_tgt_lport_register - register lport with external module
4930  *
4931  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4932  * @wwpn: Passwd FC target WWPN
4933  * @callback:  lport initialization callback for tcm_qla2xxx code
4934  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4935  */
4936 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4937                        u64 npiv_wwpn, u64 npiv_wwnn,
4938                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4939 {
4940         struct qla_tgt *tgt;
4941         struct scsi_qla_host *vha;
4942         struct qla_hw_data *ha;
4943         struct Scsi_Host *host;
4944         unsigned long flags;
4945         int rc;
4946         u8 b[WWN_SIZE];
4947
4948         mutex_lock(&qla_tgt_mutex);
4949         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4950                 vha = tgt->vha;
4951                 ha = vha->hw;
4952
4953                 host = vha->host;
4954                 if (!host)
4955                         continue;
4956
4957                 if (!(host->hostt->supported_mode & MODE_TARGET))
4958                         continue;
4959
4960                 spin_lock_irqsave(&ha->hardware_lock, flags);
4961                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4962                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4963                             host->host_no);
4964                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4965                         continue;
4966                 }
4967                 if (tgt->tgt_stop) {
4968                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
4969                                  host->host_no);
4970                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4971                         continue;
4972                 }
4973                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4974
4975                 if (!scsi_host_get(host)) {
4976                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4977                             "Unable to scsi_host_get() for"
4978                             " qla2xxx scsi_host\n");
4979                         continue;
4980                 }
4981                 qlt_lport_dump(vha, phys_wwpn, b);
4982
4983                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4984                         scsi_host_put(host);
4985                         continue;
4986                 }
4987                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4988                 if (rc != 0)
4989                         scsi_host_put(host);
4990
4991                 mutex_unlock(&qla_tgt_mutex);
4992                 return rc;
4993         }
4994         mutex_unlock(&qla_tgt_mutex);
4995
4996         return -ENODEV;
4997 }
4998 EXPORT_SYMBOL(qlt_lport_register);
4999
5000 /**
5001  * qla_tgt_lport_deregister - Degister lport
5002  *
5003  * @vha:  Registered scsi_qla_host pointer
5004  */
5005 void qlt_lport_deregister(struct scsi_qla_host *vha)
5006 {
5007         struct qla_hw_data *ha = vha->hw;
5008         struct Scsi_Host *sh = vha->host;
5009         /*
5010          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5011          */
5012         vha->vha_tgt.target_lport_ptr = NULL;
5013         ha->tgt.tgt_ops = NULL;
5014         /*
5015          * Release the Scsi_Host reference for the underlying qla2xxx host
5016          */
5017         scsi_host_put(sh);
5018 }
5019 EXPORT_SYMBOL(qlt_lport_deregister);
5020
5021 /* Must be called under HW lock */
5022 void qlt_set_mode(struct scsi_qla_host *vha)
5023 {
5024         struct qla_hw_data *ha = vha->hw;
5025
5026         switch (ql2x_ini_mode) {
5027         case QLA2XXX_INI_MODE_DISABLED:
5028         case QLA2XXX_INI_MODE_EXCLUSIVE:
5029                 vha->host->active_mode = MODE_TARGET;
5030                 break;
5031         case QLA2XXX_INI_MODE_ENABLED:
5032                 vha->host->active_mode |= MODE_TARGET;
5033                 break;
5034         default:
5035                 break;
5036         }
5037
5038         if (ha->tgt.ini_mode_force_reverse)
5039                 qla_reverse_ini_mode(vha);
5040 }
5041
5042 /* Must be called under HW lock */
5043 void qlt_clear_mode(struct scsi_qla_host *vha)
5044 {
5045         struct qla_hw_data *ha = vha->hw;
5046
5047         switch (ql2x_ini_mode) {
5048         case QLA2XXX_INI_MODE_DISABLED:
5049                 vha->host->active_mode = MODE_UNKNOWN;
5050                 break;
5051         case QLA2XXX_INI_MODE_EXCLUSIVE:
5052                 vha->host->active_mode = MODE_INITIATOR;
5053                 break;
5054         case QLA2XXX_INI_MODE_ENABLED:
5055                 vha->host->active_mode &= ~MODE_TARGET;
5056                 break;
5057         default:
5058                 break;
5059         }
5060
5061         if (ha->tgt.ini_mode_force_reverse)
5062                 qla_reverse_ini_mode(vha);
5063 }
5064
5065 /*
5066  * qla_tgt_enable_vha - NO LOCK HELD
5067  *
5068  * host_reset, bring up w/ Target Mode Enabled
5069  */
5070 void
5071 qlt_enable_vha(struct scsi_qla_host *vha)
5072 {
5073         struct qla_hw_data *ha = vha->hw;
5074         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5075         unsigned long flags;
5076         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5077
5078         if (!tgt) {
5079                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5080                     "Unable to locate qla_tgt pointer from"
5081                     " struct qla_hw_data\n");
5082                 dump_stack();
5083                 return;
5084         }
5085
5086         spin_lock_irqsave(&ha->hardware_lock, flags);
5087         tgt->tgt_stopped = 0;
5088         qlt_set_mode(vha);
5089         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5090
5091         if (vha->vp_idx) {
5092                 qla24xx_disable_vp(vha);
5093                 qla24xx_enable_vp(vha);
5094         } else {
5095                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5096                 qla2xxx_wake_dpc(base_vha);
5097                 qla2x00_wait_for_hba_online(base_vha);
5098         }
5099 }
5100 EXPORT_SYMBOL(qlt_enable_vha);
5101
5102 /*
5103  * qla_tgt_disable_vha - NO LOCK HELD
5104  *
5105  * Disable Target Mode and reset the adapter
5106  */
5107 void
5108 qlt_disable_vha(struct scsi_qla_host *vha)
5109 {
5110         struct qla_hw_data *ha = vha->hw;
5111         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5112         unsigned long flags;
5113
5114         if (!tgt) {
5115                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5116                     "Unable to locate qla_tgt pointer from"
5117                     " struct qla_hw_data\n");
5118                 dump_stack();
5119                 return;
5120         }
5121
5122         spin_lock_irqsave(&ha->hardware_lock, flags);
5123         qlt_clear_mode(vha);
5124         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5125
5126         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5127         qla2xxx_wake_dpc(vha);
5128         qla2x00_wait_for_hba_online(vha);
5129 }
5130
5131 /*
5132  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5133  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5134  * members.
5135  */
5136 void
5137 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5138 {
5139         if (!qla_tgt_mode_enabled(vha))
5140                 return;
5141
5142         vha->vha_tgt.qla_tgt = NULL;
5143
5144         mutex_init(&vha->vha_tgt.tgt_mutex);
5145         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5146
5147         qlt_clear_mode(vha);
5148
5149         /*
5150          * NOTE: Currently the value is kept the same for <24xx and
5151          * >=24xx ISPs. If it is necessary to change it,
5152          * the check should be added for specific ISPs,
5153          * assigning the value appropriately.
5154          */
5155         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5156
5157         qlt_add_target(ha, vha);
5158 }
5159
5160 void
5161 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5162 {
5163         /*
5164          * FC-4 Feature bit 0 indicates target functionality to the name server.
5165          */
5166         if (qla_tgt_mode_enabled(vha)) {
5167                 if (qla_ini_mode_enabled(vha))
5168                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5169                 else
5170                         ct_req->req.rff_id.fc4_feature = BIT_0;
5171         } else if (qla_ini_mode_enabled(vha)) {
5172                 ct_req->req.rff_id.fc4_feature = BIT_1;
5173         }
5174 }
5175
5176 /*
5177  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5178  * @ha: HA context
5179  *
5180  * Beginning of ATIO ring has initialization control block already built
5181  * by nvram config routine.
5182  *
5183  * Returns 0 on success.
5184  */
5185 void
5186 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5187 {
5188         struct qla_hw_data *ha = vha->hw;
5189         uint16_t cnt;
5190         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5191
5192         if (!qla_tgt_mode_enabled(vha))
5193                 return;
5194
5195         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5196                 pkt->u.raw.signature = ATIO_PROCESSED;
5197                 pkt++;
5198         }
5199
5200 }
5201
5202 /*
5203  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5204  * @ha: SCSI driver HA context
5205  */
5206 void
5207 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5208 {
5209         struct qla_hw_data *ha = vha->hw;
5210         struct atio_from_isp *pkt;
5211         int cnt, i;
5212
5213         if (!vha->flags.online)
5214                 return;
5215
5216         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5217                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5218                 cnt = pkt->u.raw.entry_count;
5219
5220                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5221
5222                 for (i = 0; i < cnt; i++) {
5223                         ha->tgt.atio_ring_index++;
5224                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5225                                 ha->tgt.atio_ring_index = 0;
5226                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5227                         } else
5228                                 ha->tgt.atio_ring_ptr++;
5229
5230                         pkt->u.raw.signature = ATIO_PROCESSED;
5231                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5232                 }
5233                 wmb();
5234         }
5235
5236         /* Adjust ring index */
5237         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5238 }
5239
5240 void
5241 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5242 {
5243         struct qla_hw_data *ha = vha->hw;
5244         if (!QLA_TGT_MODE_ENABLED())
5245                 return;
5246
5247         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5248         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5249         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5250
5251         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5252                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5253                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5254
5255                 icb->msix_atio = cpu_to_le16(msix->entry);
5256                 ql_dbg(ql_dbg_init, vha, 0xf072,
5257                     "Registering ICB vector 0x%x for atio que.\n",
5258                     msix->entry);
5259         }
5260 }
5261
5262 void
5263 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5264 {
5265         struct qla_hw_data *ha = vha->hw;
5266
5267         if (qla_tgt_mode_enabled(vha)) {
5268                 if (!ha->tgt.saved_set) {
5269                         /* We save only once */
5270                         ha->tgt.saved_exchange_count = nv->exchange_count;
5271                         ha->tgt.saved_firmware_options_1 =
5272                             nv->firmware_options_1;
5273                         ha->tgt.saved_firmware_options_2 =
5274                             nv->firmware_options_2;
5275                         ha->tgt.saved_firmware_options_3 =
5276                             nv->firmware_options_3;
5277                         ha->tgt.saved_set = 1;
5278                 }
5279
5280                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5281
5282                 /* Enable target mode */
5283                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5284
5285                 /* Disable ini mode, if requested */
5286                 if (!qla_ini_mode_enabled(vha))
5287                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5288
5289                 /* Disable Full Login after LIP */
5290                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5291                 /* Enable initial LIP */
5292                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5293                 /* Enable FC tapes support */
5294                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5295                 /* Disable Full Login after LIP */
5296                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5297                 /* Enable target PRLI control */
5298                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5299         } else {
5300                 if (ha->tgt.saved_set) {
5301                         nv->exchange_count = ha->tgt.saved_exchange_count;
5302                         nv->firmware_options_1 =
5303                             ha->tgt.saved_firmware_options_1;
5304                         nv->firmware_options_2 =
5305                             ha->tgt.saved_firmware_options_2;
5306                         nv->firmware_options_3 =
5307                             ha->tgt.saved_firmware_options_3;
5308                 }
5309                 return;
5310         }
5311
5312         /* out-of-order frames reassembly */
5313         nv->firmware_options_3 |= BIT_6|BIT_9;
5314
5315         if (ha->tgt.enable_class_2) {
5316                 if (vha->flags.init_done)
5317                         fc_host_supported_classes(vha->host) =
5318                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5319
5320                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5321         } else {
5322                 if (vha->flags.init_done)
5323                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5324
5325                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5326         }
5327 }
5328
5329 void
5330 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5331         struct init_cb_24xx *icb)
5332 {
5333         struct qla_hw_data *ha = vha->hw;
5334
5335         if (ha->tgt.node_name_set) {
5336                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5337                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5338         }
5339 }
5340
5341 void
5342 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5343 {
5344         struct qla_hw_data *ha = vha->hw;
5345
5346         if (!QLA_TGT_MODE_ENABLED())
5347                 return;
5348
5349         if (qla_tgt_mode_enabled(vha)) {
5350                 if (!ha->tgt.saved_set) {
5351                         /* We save only once */
5352                         ha->tgt.saved_exchange_count = nv->exchange_count;
5353                         ha->tgt.saved_firmware_options_1 =
5354                             nv->firmware_options_1;
5355                         ha->tgt.saved_firmware_options_2 =
5356                             nv->firmware_options_2;
5357                         ha->tgt.saved_firmware_options_3 =
5358                             nv->firmware_options_3;
5359                         ha->tgt.saved_set = 1;
5360                 }
5361
5362                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5363
5364                 /* Enable target mode */
5365                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5366
5367                 /* Disable ini mode, if requested */
5368                 if (!qla_ini_mode_enabled(vha))
5369                         nv->firmware_options_1 |=
5370                             __constant_cpu_to_le32(BIT_5);
5371
5372                 /* Disable Full Login after LIP */
5373                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5374                 /* Enable initial LIP */
5375                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5376                 /* Enable FC tapes support */
5377                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5378                 /* Disable Full Login after LIP */
5379                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5380                 /* Enable target PRLI control */
5381                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5382         } else {
5383                 if (ha->tgt.saved_set) {
5384                         nv->exchange_count = ha->tgt.saved_exchange_count;
5385                         nv->firmware_options_1 =
5386                             ha->tgt.saved_firmware_options_1;
5387                         nv->firmware_options_2 =
5388                             ha->tgt.saved_firmware_options_2;
5389                         nv->firmware_options_3 =
5390                             ha->tgt.saved_firmware_options_3;
5391                 }
5392                 return;
5393         }
5394
5395         /* out-of-order frames reassembly */
5396         nv->firmware_options_3 |= BIT_6|BIT_9;
5397
5398         if (ha->tgt.enable_class_2) {
5399                 if (vha->flags.init_done)
5400                         fc_host_supported_classes(vha->host) =
5401                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5402
5403                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5404         } else {
5405                 if (vha->flags.init_done)
5406                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5407
5408                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5409         }
5410 }
5411
5412 void
5413 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5414         struct init_cb_81xx *icb)
5415 {
5416         struct qla_hw_data *ha = vha->hw;
5417
5418         if (!QLA_TGT_MODE_ENABLED())
5419                 return;
5420
5421         if (ha->tgt.node_name_set) {
5422                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5423                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5424         }
5425 }
5426
5427 void
5428 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5429 {
5430         if (!QLA_TGT_MODE_ENABLED())
5431                 return;
5432
5433         ha->msix_count += 1; /* For ATIO Q */
5434 }
5435
5436 int
5437 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5438         struct sts_entry_24xx *pkt)
5439 {
5440         switch (pkt->entry_type) {
5441         case ABTS_RECV_24XX:
5442         case ABTS_RESP_24XX:
5443         case CTIO_TYPE7:
5444         case NOTIFY_ACK_TYPE:
5445         case CTIO_CRC2:
5446                 return 1;
5447         default:
5448                 return 0;
5449         }
5450 }
5451
5452 void
5453 qlt_modify_vp_config(struct scsi_qla_host *vha,
5454         struct vp_config_entry_24xx *vpmod)
5455 {
5456         if (qla_tgt_mode_enabled(vha))
5457                 vpmod->options_idx1 &= ~BIT_5;
5458         /* Disable ini mode, if requested */
5459         if (!qla_ini_mode_enabled(vha))
5460                 vpmod->options_idx1 &= ~BIT_4;
5461 }
5462
5463 void
5464 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5465 {
5466         if (!QLA_TGT_MODE_ENABLED())
5467                 return;
5468
5469         if  (ha->mqenable || IS_QLA83XX(ha)) {
5470                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5471                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5472         } else {
5473                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5474                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5475         }
5476
5477         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5478         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5479         qlt_clear_mode(base_vha);
5480 }
5481
5482 irqreturn_t
5483 qla83xx_msix_atio_q(int irq, void *dev_id)
5484 {
5485         struct rsp_que *rsp;
5486         scsi_qla_host_t *vha;
5487         struct qla_hw_data *ha;
5488         unsigned long flags;
5489
5490         rsp = (struct rsp_que *) dev_id;
5491         ha = rsp->hw;
5492         vha = pci_get_drvdata(ha->pdev);
5493
5494         spin_lock_irqsave(&ha->hardware_lock, flags);
5495
5496         qlt_24xx_process_atio_queue(vha);
5497         qla24xx_process_response_queue(vha, rsp);
5498
5499         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5500
5501         return IRQ_HANDLED;
5502 }
5503
5504 int
5505 qlt_mem_alloc(struct qla_hw_data *ha)
5506 {
5507         if (!QLA_TGT_MODE_ENABLED())
5508                 return 0;
5509
5510         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5511             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5512         if (!ha->tgt.tgt_vp_map)
5513                 return -ENOMEM;
5514
5515         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5516             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5517             &ha->tgt.atio_dma, GFP_KERNEL);
5518         if (!ha->tgt.atio_ring) {
5519                 kfree(ha->tgt.tgt_vp_map);
5520                 return -ENOMEM;
5521         }
5522         return 0;
5523 }
5524
5525 void
5526 qlt_mem_free(struct qla_hw_data *ha)
5527 {
5528         if (!QLA_TGT_MODE_ENABLED())
5529                 return;
5530
5531         if (ha->tgt.atio_ring) {
5532                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5533                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5534                     ha->tgt.atio_dma);
5535         }
5536         kfree(ha->tgt.tgt_vp_map);
5537 }
5538
5539 /* vport_slock to be held by the caller */
5540 void
5541 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5542 {
5543         if (!QLA_TGT_MODE_ENABLED())
5544                 return;
5545
5546         switch (cmd) {
5547         case SET_VP_IDX:
5548                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5549                 break;
5550         case SET_AL_PA:
5551                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5552                 break;
5553         case RESET_VP_IDX:
5554                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5555                 break;
5556         case RESET_AL_PA:
5557                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5558                 break;
5559         }
5560 }
5561
5562 static int __init qlt_parse_ini_mode(void)
5563 {
5564         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5565                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5566         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5567                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5568         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5569                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5570         else
5571                 return false;
5572
5573         return true;
5574 }
5575
5576 int __init qlt_init(void)
5577 {
5578         int ret;
5579
5580         if (!qlt_parse_ini_mode()) {
5581                 ql_log(ql_log_fatal, NULL, 0xe06b,
5582                     "qlt_parse_ini_mode() failed\n");
5583                 return -EINVAL;
5584         }
5585
5586         if (!QLA_TGT_MODE_ENABLED())
5587                 return 0;
5588
5589         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5590             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5591             qla_tgt_mgmt_cmd), 0, NULL);
5592         if (!qla_tgt_mgmt_cmd_cachep) {
5593                 ql_log(ql_log_fatal, NULL, 0xe06d,
5594                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5595                 return -ENOMEM;
5596         }
5597
5598         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5599             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5600         if (!qla_tgt_mgmt_cmd_mempool) {
5601                 ql_log(ql_log_fatal, NULL, 0xe06e,
5602                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5603                 ret = -ENOMEM;
5604                 goto out_mgmt_cmd_cachep;
5605         }
5606
5607         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5608         if (!qla_tgt_wq) {
5609                 ql_log(ql_log_fatal, NULL, 0xe06f,
5610                     "alloc_workqueue for qla_tgt_wq failed\n");
5611                 ret = -ENOMEM;
5612                 goto out_cmd_mempool;
5613         }
5614         /*
5615          * Return 1 to signal that initiator-mode is being disabled
5616          */
5617         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5618
5619 out_cmd_mempool:
5620         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5621 out_mgmt_cmd_cachep:
5622         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5623         return ret;
5624 }
5625
5626 void qlt_exit(void)
5627 {
5628         if (!QLA_TGT_MODE_ENABLED())
5629                 return;
5630
5631         destroy_workqueue(qla_tgt_wq);
5632         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5633         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5634 }