Pileus Git - ~andy/linux/blob - 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) 2010-2011 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_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         switch (atio->u.raw.entry_type) {
 186         case ATIO_TYPE7:
 187         {
 188                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 189                     atio->u.isp24.fcp_hdr.d_id);
 190                 if (unlikely(NULL == host)) {
 191                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 192                             "qla_target(%d): Received ATIO_TYPE7 "
 193                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 194                             atio->u.isp24.fcp_hdr.d_id[0],
 195                             atio->u.isp24.fcp_hdr.d_id[1],
 196                             atio->u.isp24.fcp_hdr.d_id[2]);
 197                         break;
 198                 }
 199                 qlt_24xx_atio_pkt(host, atio);
 200                 break;
 201         }
 202
 203         case IMMED_NOTIFY_TYPE:
 204         {
 205                 struct scsi_qla_host *host = vha;
 206                 struct imm_ntfy_from_isp *entry =
 207                     (struct imm_ntfy_from_isp *)atio;
 208
 209                 if ((entry->u.isp24.vp_index != 0xFF) &&
 210                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 211                         host = qlt_find_host_by_vp_idx(vha,
 212                             entry->u.isp24.vp_index);
 213                         if (unlikely(!host)) {
 214                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 215                                     "qla_target(%d): Received "
 216                                     "ATIO (IMMED_NOTIFY_TYPE) "
 217                                     "with unknown vp_index %d\n",
 218                                     vha->vp_idx, entry->u.isp24.vp_index);
 219                                 break;
 220                         }
 221                 }
 222                 qlt_24xx_atio_pkt(host, atio);
 223                 break;
 224         }
 225
 226         default:
 227                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 228                     "qla_target(%d): Received unknown ATIO atio "
 229                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 230                 break;
 231         }
 232
 233         return;
 234 }
 235
 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 237 {
 238         switch (pkt->entry_type) {
 239         case CTIO_TYPE7:
 240         {
 241                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 242                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 243                     entry->vp_index);
 244                 if (unlikely(!host)) {
 245                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 246                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 247                             "received, with unknown vp_index %d\n",
 248                             vha->vp_idx, entry->vp_index);
 249                         break;
 250                 }
 251                 qlt_response_pkt(host, pkt);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)pkt;
 260
 261                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 262                 if (unlikely(!host)) {
 263                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 264                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 265                             "received, with unknown vp_index %d\n",
 266                             vha->vp_idx, entry->u.isp24.vp_index);
 267                         break;
 268                 }
 269                 qlt_response_pkt(host, pkt);
 270                 break;
 271         }
 272
 273         case NOTIFY_ACK_TYPE:
 274         {
 275                 struct scsi_qla_host *host = vha;
 276                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 277
 278                 if (0xFF != entry->u.isp24.vp_index) {
 279                         host = qlt_find_host_by_vp_idx(vha,
 280                             entry->u.isp24.vp_index);
 281                         if (unlikely(!host)) {
 282                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 283                                     "qla_target(%d): Response "
 284                                     "pkt (NOTIFY_ACK_TYPE) "
 285                                     "received, with unknown "
 286                                     "vp_index %d\n", vha->vp_idx,
 287                                     entry->u.isp24.vp_index);
 288                                 break;
 289                         }
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case ABTS_RECV_24XX:
 296         {
 297                 struct abts_recv_from_24xx *entry =
 298                     (struct abts_recv_from_24xx *)pkt;
 299                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 300                     entry->vp_index);
 301                 if (unlikely(!host)) {
 302                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 303                             "qla_target(%d): Response pkt "
 304                             "(ABTS_RECV_24XX) received, with unknown "
 305                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 306                         break;
 307                 }
 308                 qlt_response_pkt(host, pkt);
 309                 break;
 310         }
 311
 312         case ABTS_RESP_24XX:
 313         {
 314                 struct abts_resp_to_24xx *entry =
 315                     (struct abts_resp_to_24xx *)pkt;
 316                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 317                     entry->vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 320                             "qla_target(%d): Response pkt "
 321                             "(ABTS_RECV_24XX) received, with unknown "
 322                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         default:
 330                 qlt_response_pkt(vha, pkt);
 331                 break;
 332         }
 333
 334 }
 335
 336 static void qlt_free_session_done(struct work_struct *work)
 337 {
 338         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 339             free_work);
 340         struct qla_tgt *tgt = sess->tgt;
 341         struct scsi_qla_host *vha = sess->vha;
 342         struct qla_hw_data *ha = vha->hw;
 343
 344         BUG_ON(!tgt);
 345         /*
 346          * Release the target session for FC Nexus from fabric module code.
 347          */
 348         if (sess->se_sess != NULL)
 349                 ha->tgt.tgt_ops->free_session(sess);
 350
 351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 352             "Unregistration of sess %p finished\n", sess);
 353
 354         kfree(sess);
 355         /*
 356          * We need to protect against race, when tgt is freed before or
 357          * inside wake_up()
 358          */
 359         tgt->sess_count--;
 360         if (tgt->sess_count == 0)
 361                 wake_up_all(&tgt->waitQ);
 362 }
 363
 364 /* ha->hardware_lock supposed to be held on entry */
 365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 366 {
 367         struct scsi_qla_host *vha = sess->vha;
 368
 369         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 370
 371         list_del(&sess->sess_list_entry);
 372         if (sess->deleted)
 373                 list_del(&sess->del_list_entry);
 374
 375         INIT_WORK(&sess->free_work, qlt_free_session_done);
 376         schedule_work(&sess->free_work);
 377 }
 378 EXPORT_SYMBOL(qlt_unreg_sess);
 379
 380 /* ha->hardware_lock supposed to be held on entry */
 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 382 {
 383         struct qla_hw_data *ha = vha->hw;
 384         struct qla_tgt_sess *sess = NULL;
 385         uint32_t unpacked_lun, lun = 0;
 386         uint16_t loop_id;
 387         int res = 0;
 388         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 389         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 390
 391         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 392         if (loop_id == 0xFFFF) {
 393 #if 0 /* FIXME: Re-enable Global event handling.. */
 394                 /* Global event */
 395                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 396                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 397                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 398                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 399                             typeof(*sess), sess_list_entry);
 400                         switch (mcmd) {
 401                         case QLA_TGT_NEXUS_LOSS_SESS:
 402                                 mcmd = QLA_TGT_NEXUS_LOSS;
 403                                 break;
 404                         case QLA_TGT_ABORT_ALL_SESS:
 405                                 mcmd = QLA_TGT_ABORT_ALL;
 406                                 break;
 407                         case QLA_TGT_NEXUS_LOSS:
 408                         case QLA_TGT_ABORT_ALL:
 409                                 break;
 410                         default:
 411                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 412                                     "qla_target(%d): Not allowed "
 413                                     "command %x in %s", vha->vp_idx,
 414                                     mcmd, __func__);
 415                                 sess = NULL;
 416                                 break;
 417                         }
 418                 } else
 419                         sess = NULL;
 420 #endif
 421         } else {
 422                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 423         }
 424
 425         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 426             "Using sess for qla_tgt_reset: %p\n", sess);
 427         if (!sess) {
 428                 res = -ESRCH;
 429                 return res;
 430         }
 431
 432         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 433             "scsi(%ld): resetting (session %p from port "
 434             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
 435             "mcmd %x, loop_id %d)\n", vha->host_no, sess,
 436             sess->port_name[0], sess->port_name[1],
 437             sess->port_name[2], sess->port_name[3],
 438             sess->port_name[4], sess->port_name[5],
 439             sess->port_name[6], sess->port_name[7],
 440             mcmd, loop_id);
 441
 442         lun = a->u.isp24.fcp_cmnd.lun;
 443         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 444
 445         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 446             iocb, QLA24XX_MGMT_SEND_NACK);
 447 }
 448
 449 /* ha->hardware_lock supposed to be held on entry */
 450 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 451         bool immediate)
 452 {
 453         struct qla_tgt *tgt = sess->tgt;
 454         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 455
 456         if (sess->deleted)
 457                 return;
 458
 459         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 460             "Scheduling sess %p for deletion\n", sess);
 461         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 462         sess->deleted = 1;
 463
 464         if (immediate)
 465                 dev_loss_tmo = 0;
 466
 467         sess->expires = jiffies + dev_loss_tmo * HZ;
 468
 469         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 470             "qla_target(%d): session for port %02x:%02x:%02x:"
 471             "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
 472             "deletion in %u secs (expires: %lu) immed: %d\n",
 473             sess->vha->vp_idx,
 474             sess->port_name[0], sess->port_name[1],
 475             sess->port_name[2], sess->port_name[3],
 476             sess->port_name[4], sess->port_name[5],
 477             sess->port_name[6], sess->port_name[7],
 478             sess->loop_id, dev_loss_tmo, sess->expires, immediate);
 479
 480         if (immediate)
 481                 schedule_delayed_work(&tgt->sess_del_work, 0);
 482         else
 483                 schedule_delayed_work(&tgt->sess_del_work,
 484                     jiffies - sess->expires);
 485 }
 486
 487 /* ha->hardware_lock supposed to be held on entry */
 488 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 489 {
 490         struct qla_tgt_sess *sess;
 491
 492         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 493                 qlt_schedule_sess_for_deletion(sess, true);
 494
 495         /* At this point tgt could be already dead */
 496 }
 497
 498 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 499         uint16_t *loop_id)
 500 {
 501         struct qla_hw_data *ha = vha->hw;
 502         dma_addr_t gid_list_dma;
 503         struct gid_list_info *gid_list;
 504         char *id_iter;
 505         int res, rc, i;
 506         uint16_t entries;
 507
 508         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 509             &gid_list_dma, GFP_KERNEL);
 510         if (!gid_list) {
 511                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 512                     "qla_target(%d): DMA Alloc failed of %u\n",
 513                     vha->vp_idx, qla2x00_gid_list_size(ha));
 514                 return -ENOMEM;
 515         }
 516
 517         /* Get list of logged in devices */
 518         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 519         if (rc != QLA_SUCCESS) {
 520                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 521                     "qla_target(%d): get_id_list() failed: %x\n",
 522                     vha->vp_idx, rc);
 523                 res = -1;
 524                 goto out_free_id_list;
 525         }
 526
 527         id_iter = (char *)gid_list;
 528         res = -1;
 529         for (i = 0; i < entries; i++) {
 530                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 531                 if ((gid->al_pa == s_id[2]) &&
 532                     (gid->area == s_id[1]) &&
 533                     (gid->domain == s_id[0])) {
 534                         *loop_id = le16_to_cpu(gid->loop_id);
 535                         res = 0;
 536                         break;
 537                 }
 538                 id_iter += ha->gid_list_info_size;
 539         }
 540
 541 out_free_id_list:
 542         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 543             gid_list, gid_list_dma);
 544         return res;
 545 }
 546
 547 static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
 548         struct qla_tgt_sess *sess)
 549 {
 550         struct qla_hw_data *ha = vha->hw;
 551         struct qla_port_24xx_data *pmap24;
 552         bool res, found = false;
 553         int rc, i;
 554         uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
 555         uint16_t entries;
 556         void *pmap;
 557         int pmap_len;
 558         fc_port_t *fcport;
 559         int global_resets;
 560         unsigned long flags;
 561
 562 retry:
 563         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
 564
 565         rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
 566         if (rc != QLA_SUCCESS) {
 567                 res = false;
 568                 goto out;
 569         }
 570
 571         pmap24 = pmap;
 572         entries = pmap_len/sizeof(*pmap24);
 573
 574         for (i = 0; i < entries; ++i) {
 575                 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
 576                         loop_id = le16_to_cpu(pmap24[i].loop_id);
 577                         found = true;
 578                         break;
 579                 }
 580         }
 581
 582         kfree(pmap);
 583
 584         if (!found) {
 585                 res = false;
 586                 goto out;
 587         }
 588
 589         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
 590             "qlt_check_fcport_exist(): loop_id %d", loop_id);
 591
 592         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
 593         if (fcport == NULL) {
 594                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
 595                     "qla_target(%d): Allocation of tmp FC port failed",
 596                     vha->vp_idx);
 597                 res = false;
 598                 goto out;
 599         }
 600
 601         fcport->loop_id = loop_id;
 602
 603         rc = qla2x00_get_port_database(vha, fcport, 0);
 604         if (rc != QLA_SUCCESS) {
 605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
 606                     "qla_target(%d): Failed to retrieve fcport "
 607                     "information -- get_port_database() returned %x "
 608                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
 609                 res = false;
 610                 goto out_free_fcport;
 611         }
 612
 613         if (global_resets !=
 614             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
 615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
 616                     "qla_target(%d): global reset during session discovery"
 617                     " (counter was %d, new %d), retrying",
 618                     vha->vp_idx, global_resets,
 619                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
 620                 goto retry;
 621         }
 622
 623         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
 624             "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, "
 625             "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa,
 626             sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
 627             fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id);
 628
 629         spin_lock_irqsave(&ha->hardware_lock, flags);
 630         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 631                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 632         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 633
 634         res = true;
 635
 636 out_free_fcport:
 637         kfree(fcport);
 638
 639 out:
 640         return res;
 641 }
 642
 643 /* ha->hardware_lock supposed to be held on entry */
 644 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 645 {
 646         BUG_ON(!sess->deleted);
 647
 648         list_del(&sess->del_list_entry);
 649         sess->deleted = 0;
 650 }
 651
 652 static void qlt_del_sess_work_fn(struct delayed_work *work)
 653 {
 654         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 655             sess_del_work);
 656         struct scsi_qla_host *vha = tgt->vha;
 657         struct qla_hw_data *ha = vha->hw;
 658         struct qla_tgt_sess *sess;
 659         unsigned long flags;
 660
 661         spin_lock_irqsave(&ha->hardware_lock, flags);
 662         while (!list_empty(&tgt->del_sess_list)) {
 663                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 664                     del_list_entry);
 665                 if (time_after_eq(jiffies, sess->expires)) {
 666                         bool cancel;
 667
 668                         qlt_undelete_sess(sess);
 669
 670                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 671                         cancel = qlt_check_fcport_exist(vha, sess);
 672
 673                         if (cancel) {
 674                                 if (sess->deleted) {
 675                                         /*
 676                                          * sess was again deleted while we were
 677                                          * discovering it
 678                                          */
 679                                         spin_lock_irqsave(&ha->hardware_lock,
 680                                             flags);
 681                                         continue;
 682                                 }
 683
 684                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
 685                                     "qla_target(%d): cancel deletion of "
 686                                     "session for port %02x:%02x:%02x:%02x:%02x:"
 687                                     "%02x:%02x:%02x (loop ID %d), because "
 688                                     " it isn't deleted by firmware",
 689                                     vha->vp_idx, sess->port_name[0],
 690                                     sess->port_name[1], sess->port_name[2],
 691                                     sess->port_name[3], sess->port_name[4],
 692                                     sess->port_name[5], sess->port_name[6],
 693                                     sess->port_name[7], sess->loop_id);
 694                         } else {
 695                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 696                                     "Timeout: sess %p about to be deleted\n",
 697                                     sess);
 698                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 699                                 ha->tgt.tgt_ops->put_sess(sess);
 700                         }
 701
 702                         spin_lock_irqsave(&ha->hardware_lock, flags);
 703                 } else {
 704                         schedule_delayed_work(&tgt->sess_del_work,
 705                             jiffies - sess->expires);
 706                         break;
 707                 }
 708         }
 709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710 }
 711
 712 /*
 713  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 714  * Caller must put it.
 715  */
 716 static struct qla_tgt_sess *qlt_create_sess(
 717         struct scsi_qla_host *vha,
 718         fc_port_t *fcport,
 719         bool local)
 720 {
 721         struct qla_hw_data *ha = vha->hw;
 722         struct qla_tgt_sess *sess;
 723         unsigned long flags;
 724         unsigned char be_sid[3];
 725
 726         /* Check to avoid double sessions */
 727         spin_lock_irqsave(&ha->hardware_lock, flags);
 728         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 729                                 sess_list_entry) {
 730                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 731                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 732                             "Double sess %p found (s_id %x:%x:%x, "
 733                             "loop_id %d), updating to d_id %x:%x:%x, "
 734                             "loop_id %d", sess, sess->s_id.b.domain,
 735                             sess->s_id.b.al_pa, sess->s_id.b.area,
 736                             sess->loop_id, fcport->d_id.b.domain,
 737                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 738                             fcport->loop_id);
 739
 740                         if (sess->deleted)
 741                                 qlt_undelete_sess(sess);
 742
 743                         kref_get(&sess->se_sess->sess_kref);
 744                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 745                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 746
 747                         if (sess->local && !local)
 748                                 sess->local = 0;
 749                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 750
 751                         return sess;
 752                 }
 753         }
 754         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 755
 756         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 757         if (!sess) {
 758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 759                     "qla_target(%u): session allocation failed, "
 760                     "all commands from port %02x:%02x:%02x:%02x:"
 761                     "%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
 762                     fcport->port_name[0], fcport->port_name[1],
 763                     fcport->port_name[2], fcport->port_name[3],
 764                     fcport->port_name[4], fcport->port_name[5],
 765                     fcport->port_name[6], fcport->port_name[7]);
 766
 767                 return NULL;
 768         }
 769         sess->tgt = ha->tgt.qla_tgt;
 770         sess->vha = vha;
 771         sess->s_id = fcport->d_id;
 772         sess->loop_id = fcport->loop_id;
 773         sess->local = local;
 774
 775         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 776             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 777             sess, ha->tgt.qla_tgt);
 778
 779         be_sid[0] = sess->s_id.b.domain;
 780         be_sid[1] = sess->s_id.b.area;
 781         be_sid[2] = sess->s_id.b.al_pa;
 782         /*
 783          * Determine if this fc_port->port_name is allowed to access
 784          * target mode using explict NodeACLs+MappedLUNs, or using
 785          * TPG demo mode.  If this is successful a target mode FC nexus
 786          * is created.
 787          */
 788         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 789             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 790                 kfree(sess);
 791                 return NULL;
 792         }
 793         /*
 794          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 795          * access across ->hardware_lock reaquire.
 796          */
 797         kref_get(&sess->se_sess->sess_kref);
 798
 799         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 800         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 801         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 802
 803         spin_lock_irqsave(&ha->hardware_lock, flags);
 804         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 805         ha->tgt.qla_tgt->sess_count++;
 806         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 807
 808         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 809             "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
 810             "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
 811             " completion %ssupported) added\n",
 812             vha->vp_idx, local ?  "local " : "", fcport->port_name[0],
 813             fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
 814             fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
 815             fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain,
 816             sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ?
 817             "" : "not ");
 818
 819         return sess;
 820 }
 821
 822 /*
 823  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 824  */
 825 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 826 {
 827         struct qla_hw_data *ha = vha->hw;
 828         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 829         struct qla_tgt_sess *sess;
 830         unsigned long flags;
 831
 832         if (!vha->hw->tgt.tgt_ops)
 833                 return;
 834
 835         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 836                 return;
 837
 838         spin_lock_irqsave(&ha->hardware_lock, flags);
 839         if (tgt->tgt_stop) {
 840                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 841                 return;
 842         }
 843         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 844         if (!sess) {
 845                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 846
 847                 mutex_lock(&ha->tgt.tgt_mutex);
 848                 sess = qlt_create_sess(vha, fcport, false);
 849                 mutex_unlock(&ha->tgt.tgt_mutex);
 850
 851                 spin_lock_irqsave(&ha->hardware_lock, flags);
 852         } else {
 853                 kref_get(&sess->se_sess->sess_kref);
 854
 855                 if (sess->deleted) {
 856                         qlt_undelete_sess(sess);
 857
 858                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 859                             "qla_target(%u): %ssession for port %02x:"
 860                             "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
 861                             "reappeared\n", vha->vp_idx, sess->local ? "local "
 862                             : "", sess->port_name[0], sess->port_name[1],
 863                             sess->port_name[2], sess->port_name[3],
 864                             sess->port_name[4], sess->port_name[5],
 865                             sess->port_name[6], sess->port_name[7],
 866                             sess->loop_id);
 867
 868                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 869                             "Reappeared sess %p\n", sess);
 870                 }
 871                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 872                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 873         }
 874
 875         if (sess && sess->local) {
 876                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 877                     "qla_target(%u): local session for "
 878                     "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 879                     "(loop ID %d) became global\n", vha->vp_idx,
 880                     fcport->port_name[0], fcport->port_name[1],
 881                     fcport->port_name[2], fcport->port_name[3],
 882                     fcport->port_name[4], fcport->port_name[5],
 883                     fcport->port_name[6], fcport->port_name[7],
 884                     sess->loop_id);
 885                 sess->local = 0;
 886         }
 887         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 888
 889         ha->tgt.tgt_ops->put_sess(sess);
 890 }
 891
 892 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 893 {
 894         struct qla_hw_data *ha = vha->hw;
 895         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 896         struct qla_tgt_sess *sess;
 897         unsigned long flags;
 898
 899         if (!vha->hw->tgt.tgt_ops)
 900                 return;
 901
 902         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 903                 return;
 904
 905         spin_lock_irqsave(&ha->hardware_lock, flags);
 906         if (tgt->tgt_stop) {
 907                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 908                 return;
 909         }
 910         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 911         if (!sess) {
 912                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 913                 return;
 914         }
 915
 916         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 917
 918         sess->local = 1;
 919         qlt_schedule_sess_for_deletion(sess, false);
 920         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 921 }
 922
 923 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 924 {
 925         struct qla_hw_data *ha = tgt->ha;
 926         unsigned long flags;
 927         int res;
 928         /*
 929          * We need to protect against race, when tgt is freed before or
 930          * inside wake_up()
 931          */
 932         spin_lock_irqsave(&ha->hardware_lock, flags);
 933         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 934             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 935             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 936         res = (tgt->sess_count == 0);
 937         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 938
 939         return res;
 940 }
 941
 942 /* Called by tcm_qla2xxx configfs code */
 943 void qlt_stop_phase1(struct qla_tgt *tgt)
 944 {
 945         struct scsi_qla_host *vha = tgt->vha;
 946         struct qla_hw_data *ha = tgt->ha;
 947         unsigned long flags;
 948
 949         if (tgt->tgt_stop || tgt->tgt_stopped) {
 950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 951                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 952                 dump_stack();
 953                 return;
 954         }
 955
 956         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 957             vha->host_no, vha);
 958         /*
 959          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 960          * Lock is needed, because we still can get an incoming packet.
 961          */
 962         mutex_lock(&ha->tgt.tgt_mutex);
 963         spin_lock_irqsave(&ha->hardware_lock, flags);
 964         tgt->tgt_stop = 1;
 965         qlt_clear_tgt_db(tgt, true);
 966         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 967         mutex_unlock(&ha->tgt.tgt_mutex);
 968
 969         flush_delayed_work(&tgt->sess_del_work);
 970
 971         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 972             "Waiting for sess works (tgt %p)", tgt);
 973         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 974         while (!list_empty(&tgt->sess_works_list)) {
 975                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 976                 flush_scheduled_work();
 977                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 978         }
 979         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 980
 981         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 982             "Waiting for tgt %p: list_empty(sess_list)=%d "
 983             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 984             tgt->sess_count);
 985
 986         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 987
 988         /* Big hammer */
 989         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 990                 qlt_disable_vha(vha);
 991
 992         /* Wait for sessions to clear out (just in case) */
 993         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 994 }
 995 EXPORT_SYMBOL(qlt_stop_phase1);
 996
 997 /* Called by tcm_qla2xxx configfs code */
 998 void qlt_stop_phase2(struct qla_tgt *tgt)
 999 {
1000         struct qla_hw_data *ha = tgt->ha;
1001         unsigned long flags;
1002
1003         if (tgt->tgt_stopped) {
1004                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
1005                     "Already in tgt->tgt_stopped state\n");
1006                 dump_stack();
1007                 return;
1008         }
1009
1010         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
1011             "Waiting for %d IRQ commands to complete (tgt %p)",
1012             tgt->irq_cmd_count, tgt);
1013
1014         mutex_lock(&ha->tgt.tgt_mutex);
1015         spin_lock_irqsave(&ha->hardware_lock, flags);
1016         while (tgt->irq_cmd_count != 0) {
1017                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1018                 udelay(2);
1019                 spin_lock_irqsave(&ha->hardware_lock, flags);
1020         }
1021         tgt->tgt_stop = 0;
1022         tgt->tgt_stopped = 1;
1023         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1024         mutex_unlock(&ha->tgt.tgt_mutex);
1025
1026         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
1027             tgt);
1028 }
1029 EXPORT_SYMBOL(qlt_stop_phase2);
1030
1031 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1032 static void qlt_release(struct qla_tgt *tgt)
1033 {
1034         struct qla_hw_data *ha = tgt->ha;
1035
1036         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1037                 qlt_stop_phase2(tgt);
1038
1039         ha->tgt.qla_tgt = NULL;
1040
1041         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
1042             "Release of tgt %p finished\n", tgt);
1043
1044         kfree(tgt);
1045 }
1046
1047 /* ha->hardware_lock supposed to be held on entry */
1048 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1049         const void *param, unsigned int param_size)
1050 {
1051         struct qla_tgt_sess_work_param *prm;
1052         unsigned long flags;
1053
1054         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1055         if (!prm) {
1056                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1057                     "qla_target(%d): Unable to create session "
1058                     "work, command will be refused", 0);
1059                 return -ENOMEM;
1060         }
1061
1062         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1063             "Scheduling work (type %d, prm %p)"
1064             " to find session for param %p (size %d, tgt %p)\n",
1065             type, prm, param, param_size, tgt);
1066
1067         prm->type = type;
1068         memcpy(&prm->tm_iocb, param, param_size);
1069
1070         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1071         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1072         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1073
1074         schedule_work(&tgt->sess_work);
1075
1076         return 0;
1077 }
1078
1079 /*
1080  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1081  */
1082 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1083         struct imm_ntfy_from_isp *ntfy,
1084         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1085         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1086 {
1087         struct qla_hw_data *ha = vha->hw;
1088         request_t *pkt;
1089         struct nack_to_isp *nack;
1090
1091         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1092
1093         /* Send marker if required */
1094         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095                 return;
1096
1097         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1098         if (!pkt) {
1099                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1100                     "qla_target(%d): %s failed: unable to allocate "
1101                     "request packet\n", vha->vp_idx, __func__);
1102                 return;
1103         }
1104
1105         if (ha->tgt.qla_tgt != NULL)
1106                 ha->tgt.qla_tgt->notify_ack_expected++;
1107
1108         pkt->entry_type = NOTIFY_ACK_TYPE;
1109         pkt->entry_count = 1;
1110
1111         nack = (struct nack_to_isp *)pkt;
1112         nack->ox_id = ntfy->ox_id;
1113
1114         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1115         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1116                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1117                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1118         }
1119         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1120         nack->u.isp24.status = ntfy->u.isp24.status;
1121         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1122         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1123         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1124         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1125         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1126         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1127         nack->u.isp24.srr_reject_code = srr_reject_code;
1128         nack->u.isp24.srr_reject_code_expl = srr_explan;
1129         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1130
1131         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1132             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1133             vha->vp_idx, nack->u.isp24.status);
1134
1135         qla2x00_start_iocbs(vha, vha->req);
1136 }
1137
1138 /*
1139  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1140  */
1141 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1142         struct abts_recv_from_24xx *abts, uint32_t status,
1143         bool ids_reversed)
1144 {
1145         struct qla_hw_data *ha = vha->hw;
1146         struct abts_resp_to_24xx *resp;
1147         uint32_t f_ctl;
1148         uint8_t *p;
1149
1150         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1151             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1152             ha, abts, status);
1153
1154         /* Send marker if required */
1155         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1156                 return;
1157
1158         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1159         if (!resp) {
1160                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1161                     "qla_target(%d): %s failed: unable to allocate "
1162                     "request packet", vha->vp_idx, __func__);
1163                 return;
1164         }
1165
1166         resp->entry_type = ABTS_RESP_24XX;
1167         resp->entry_count = 1;
1168         resp->nport_handle = abts->nport_handle;
1169         resp->vp_index = vha->vp_idx;
1170         resp->sof_type = abts->sof_type;
1171         resp->exchange_address = abts->exchange_address;
1172         resp->fcp_hdr_le = abts->fcp_hdr_le;
1173         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1174             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1175             F_CTL_SEQ_INITIATIVE);
1176         p = (uint8_t *)&f_ctl;
1177         resp->fcp_hdr_le.f_ctl[0] = *p++;
1178         resp->fcp_hdr_le.f_ctl[1] = *p++;
1179         resp->fcp_hdr_le.f_ctl[2] = *p;
1180         if (ids_reversed) {
1181                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1182                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1183                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1184                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1185                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1186                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1187         } else {
1188                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1189                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1190                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1191                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1192                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1193                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1194         }
1195         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1196         if (status == FCP_TMF_CMPL) {
1197                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1198                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1199                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1200                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1201                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1202                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1203         } else {
1204                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1205                 resp->payload.ba_rjt.reason_code =
1206                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1207                 /* Other bytes are zero */
1208         }
1209
1210         ha->tgt.qla_tgt->abts_resp_expected++;
1211
1212         qla2x00_start_iocbs(vha, vha->req);
1213 }
1214
1215 /*
1216  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1217  */
1218 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1219         struct abts_resp_from_24xx_fw *entry)
1220 {
1221         struct ctio7_to_24xx *ctio;
1222
1223         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1224             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1225         /* Send marker if required */
1226         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1227                 return;
1228
1229         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1230         if (ctio == NULL) {
1231                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1232                     "qla_target(%d): %s failed: unable to allocate "
1233                     "request packet\n", vha->vp_idx, __func__);
1234                 return;
1235         }
1236
1237         /*
1238          * We've got on entrance firmware's response on by us generated
1239          * ABTS response. So, in it ID fields are reversed.
1240          */
1241
1242         ctio->entry_type = CTIO_TYPE7;
1243         ctio->entry_count = 1;
1244         ctio->nport_handle = entry->nport_handle;
1245         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1246         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1247         ctio->vp_index = vha->vp_idx;
1248         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1249         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1250         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1251         ctio->exchange_addr = entry->exchange_addr_to_abort;
1252         ctio->u.status1.flags =
1253             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1254                 CTIO7_FLAGS_TERMINATE);
1255         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1256
1257         qla2x00_start_iocbs(vha, vha->req);
1258
1259         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1260             FCP_TMF_CMPL, true);
1261 }
1262
1263 /* ha->hardware_lock supposed to be held on entry */
1264 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1265         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1266 {
1267         struct qla_hw_data *ha = vha->hw;
1268         struct se_session *se_sess = sess->se_sess;
1269         struct qla_tgt_mgmt_cmd *mcmd;
1270         struct se_cmd *se_cmd;
1271         u32 lun = 0;
1272         int rc;
1273         bool found_lun = false;
1274
1275         spin_lock(&se_sess->sess_cmd_lock);
1276         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1277                 struct qla_tgt_cmd *cmd =
1278                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1279                 if (cmd->tag == abts->exchange_addr_to_abort) {
1280                         lun = cmd->unpacked_lun;
1281                         found_lun = true;
1282                         break;
1283                 }
1284         }
1285         spin_unlock(&se_sess->sess_cmd_lock);
1286
1287         if (!found_lun)
1288                 return -ENOENT;
1289
1290         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1291             "qla_target(%d): task abort (tag=%d)\n",
1292             vha->vp_idx, abts->exchange_addr_to_abort);
1293
1294         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1295         if (mcmd == NULL) {
1296                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1297                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1298                     vha->vp_idx, __func__);
1299                 return -ENOMEM;
1300         }
1301         memset(mcmd, 0, sizeof(*mcmd));
1302
1303         mcmd->sess = sess;
1304         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1305
1306         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1307             abts->exchange_addr_to_abort);
1308         if (rc != 0) {
1309                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1310                     "qla_target(%d):  tgt_ops->handle_tmr()"
1311                     " failed: %d", vha->vp_idx, rc);
1312                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1313                 return -EFAULT;
1314         }
1315
1316         return 0;
1317 }
1318
1319 /*
1320  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1321  */
1322 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1323         struct abts_recv_from_24xx *abts)
1324 {
1325         struct qla_hw_data *ha = vha->hw;
1326         struct qla_tgt_sess *sess;
1327         uint32_t tag = abts->exchange_addr_to_abort;
1328         uint8_t s_id[3];
1329         int rc;
1330
1331         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1332                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1333                     "qla_target(%d): ABTS: Abort Sequence not "
1334                     "supported\n", vha->vp_idx);
1335                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1336                 return;
1337         }
1338
1339         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1340                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1341                     "qla_target(%d): ABTS: Unknown Exchange "
1342                     "Address received\n", vha->vp_idx);
1343                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1344                 return;
1345         }
1346
1347         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1348             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1349             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1350             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1351             le32_to_cpu(abts->fcp_hdr_le.parameter));
1352
1353         s_id[0] = abts->fcp_hdr_le.s_id[2];
1354         s_id[1] = abts->fcp_hdr_le.s_id[1];
1355         s_id[2] = abts->fcp_hdr_le.s_id[0];
1356
1357         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1358         if (!sess) {
1359                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1360                     "qla_target(%d): task abort for non-existant session\n",
1361                     vha->vp_idx);
1362                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1363                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1364                 if (rc != 0) {
1365                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1366                             false);
1367                 }
1368                 return;
1369         }
1370
1371         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1372         if (rc != 0) {
1373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1374                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1375                     vha->vp_idx, rc);
1376                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1377                 return;
1378         }
1379 }
1380
1381 /*
1382  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1383  */
1384 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1385         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1386 {
1387         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1388         struct ctio7_to_24xx *ctio;
1389
1390         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1391             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1392             ha, atio, resp_code);
1393
1394         /* Send marker if required */
1395         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1396                 return;
1397
1398         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1399         if (ctio == NULL) {
1400                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1401                     "qla_target(%d): %s failed: unable to allocate "
1402                     "request packet\n", ha->vp_idx, __func__);
1403                 return;
1404         }
1405
1406         ctio->entry_type = CTIO_TYPE7;
1407         ctio->entry_count = 1;
1408         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1409         ctio->nport_handle = mcmd->sess->loop_id;
1410         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1411         ctio->vp_index = ha->vp_idx;
1412         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1413         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1414         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1415         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1416         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1417             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1418                 CTIO7_FLAGS_SEND_STATUS);
1419         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1420         ctio->u.status1.scsi_status =
1421             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1422         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1423         ctio->u.status1.sense_data[0] = resp_code;
1424
1425         qla2x00_start_iocbs(ha, ha->req);
1426 }
1427
1428 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1429 {
1430         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1431 }
1432 EXPORT_SYMBOL(qlt_free_mcmd);
1433
1434 /* callback from target fabric module code */
1435 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1436 {
1437         struct scsi_qla_host *vha = mcmd->sess->vha;
1438         struct qla_hw_data *ha = vha->hw;
1439         unsigned long flags;
1440
1441         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1442             "TM response mcmd (%p) status %#x state %#x",
1443             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1444
1445         spin_lock_irqsave(&ha->hardware_lock, flags);
1446         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1447                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1448                     0, 0, 0, 0, 0, 0);
1449         else {
1450                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1451                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1452                             mcmd->fc_tm_rsp, false);
1453                 else
1454                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1455                             mcmd->fc_tm_rsp);
1456         }
1457         /*
1458          * Make the callback for ->free_mcmd() to queue_work() and invoke
1459          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1460          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1461          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1462          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1463          * qlt_xmit_tm_rsp() returns here..
1464          */
1465         ha->tgt.tgt_ops->free_mcmd(mcmd);
1466         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1467 }
1468 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1469
1470 /* No locks */
1471 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1472 {
1473         struct qla_tgt_cmd *cmd = prm->cmd;
1474
1475         BUG_ON(cmd->sg_cnt == 0);
1476
1477         prm->sg = (struct scatterlist *)cmd->sg;
1478         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1479             cmd->sg_cnt, cmd->dma_data_direction);
1480         if (unlikely(prm->seg_cnt == 0))
1481                 goto out_err;
1482
1483         prm->cmd->sg_mapped = 1;
1484
1485         /*
1486          * If greater than four sg entries then we need to allocate
1487          * the continuation entries
1488          */
1489         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1490                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1491                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1492
1493         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1494             prm->seg_cnt, prm->req_cnt);
1495         return 0;
1496
1497 out_err:
1498         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1499             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1500             0, prm->cmd->sg_cnt);
1501         return -1;
1502 }
1503
1504 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1505         struct qla_tgt_cmd *cmd)
1506 {
1507         struct qla_hw_data *ha = vha->hw;
1508
1509         BUG_ON(!cmd->sg_mapped);
1510         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1511         cmd->sg_mapped = 0;
1512 }
1513
1514 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1515         uint32_t req_cnt)
1516 {
1517         struct qla_hw_data *ha = vha->hw;
1518         device_reg_t __iomem *reg = ha->iobase;
1519         uint32_t cnt;
1520
1521         if (vha->req->cnt < (req_cnt + 2)) {
1522                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1523
1524                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1525                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1526                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1527                     vha->req->ring_index, vha->req->cnt, req_cnt);
1528                 if  (vha->req->ring_index < cnt)
1529                         vha->req->cnt = cnt - vha->req->ring_index;
1530                 else
1531                         vha->req->cnt = vha->req->length -
1532                             (vha->req->ring_index - cnt);
1533         }
1534
1535         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1536                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1537                     "qla_target(%d): There is no room in the "
1538                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1539                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1540                     vha->req->cnt, req_cnt);
1541                 return -EAGAIN;
1542         }
1543         vha->req->cnt -= req_cnt;
1544
1545         return 0;
1546 }
1547
1548 /*
1549  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1550  */
1551 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1552 {
1553         /* Adjust ring index. */
1554         vha->req->ring_index++;
1555         if (vha->req->ring_index == vha->req->length) {
1556                 vha->req->ring_index = 0;
1557                 vha->req->ring_ptr = vha->req->ring;
1558         } else {
1559                 vha->req->ring_ptr++;
1560         }
1561         return (cont_entry_t *)vha->req->ring_ptr;
1562 }
1563
1564 /* ha->hardware_lock supposed to be held on entry */
1565 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1566 {
1567         struct qla_hw_data *ha = vha->hw;
1568         uint32_t h;
1569
1570         h = ha->tgt.current_handle;
1571         /* always increment cmd handle */
1572         do {
1573                 ++h;
1574                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1575                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1576                 if (h == ha->tgt.current_handle) {
1577                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1578                             "qla_target(%d): Ran out of "
1579                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1580                         h = QLA_TGT_NULL_HANDLE;
1581                         break;
1582                 }
1583         } while ((h == QLA_TGT_NULL_HANDLE) ||
1584             (h == QLA_TGT_SKIP_HANDLE) ||
1585             (ha->tgt.cmds[h-1] != NULL));
1586
1587         if (h != QLA_TGT_NULL_HANDLE)
1588                 ha->tgt.current_handle = h;
1589
1590         return h;
1591 }
1592
1593 /* ha->hardware_lock supposed to be held on entry */
1594 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1595         struct scsi_qla_host *vha)
1596 {
1597         uint32_t h;
1598         struct ctio7_to_24xx *pkt;
1599         struct qla_hw_data *ha = vha->hw;
1600         struct atio_from_isp *atio = &prm->cmd->atio;
1601
1602         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1603         prm->pkt = pkt;
1604         memset(pkt, 0, sizeof(*pkt));
1605
1606         pkt->entry_type = CTIO_TYPE7;
1607         pkt->entry_count = (uint8_t)prm->req_cnt;
1608         pkt->vp_index = vha->vp_idx;
1609
1610         h = qlt_make_handle(vha);
1611         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1612                 /*
1613                  * CTIO type 7 from the firmware doesn't provide a way to
1614                  * know the initiator's LOOP ID, hence we can't find
1615                  * the session and, so, the command.
1616                  */
1617                 return -EAGAIN;
1618         } else
1619                 ha->tgt.cmds[h-1] = prm->cmd;
1620
1621         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1622         pkt->nport_handle = prm->cmd->loop_id;
1623         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1624         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1625         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1626         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1627         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1628         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1629         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1630         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1631
1632         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1633             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1634             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1635             le16_to_cpu(pkt->u.status0.ox_id));
1636         return 0;
1637 }
1638
1639 /*
1640  * ha->hardware_lock supposed to be held on entry. We have already made sure
1641  * that there is sufficient amount of request entries to not drop it.
1642  */
1643 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1644         struct scsi_qla_host *vha)
1645 {
1646         int cnt;
1647         uint32_t *dword_ptr;
1648         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1649
1650         /* Build continuation packets */
1651         while (prm->seg_cnt > 0) {
1652                 cont_a64_entry_t *cont_pkt64 =
1653                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1654
1655                 /*
1656                  * Make sure that from cont_pkt64 none of
1657                  * 64-bit specific fields used for 32-bit
1658                  * addressing. Cast to (cont_entry_t *) for
1659                  * that.
1660                  */
1661
1662                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1663
1664                 cont_pkt64->entry_count = 1;
1665                 cont_pkt64->sys_define = 0;
1666
1667                 if (enable_64bit_addressing) {
1668                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1669                         dword_ptr =
1670                             (uint32_t *)&cont_pkt64->dseg_0_address;
1671                 } else {
1672                         cont_pkt64->entry_type = CONTINUE_TYPE;
1673                         dword_ptr =
1674                             (uint32_t *)&((cont_entry_t *)
1675                                 cont_pkt64)->dseg_0_address;
1676                 }
1677
1678                 /* Load continuation entry data segments */
1679                 for (cnt = 0;
1680                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1681                     cnt++, prm->seg_cnt--) {
1682                         *dword_ptr++ =
1683                             cpu_to_le32(pci_dma_lo32
1684                                 (sg_dma_address(prm->sg)));
1685                         if (enable_64bit_addressing) {
1686                                 *dword_ptr++ =
1687                                     cpu_to_le32(pci_dma_hi32
1688                                         (sg_dma_address
1689                                         (prm->sg)));
1690                         }
1691                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1692
1693                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1694                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1695                             (long long unsigned int)
1696                             pci_dma_hi32(sg_dma_address(prm->sg)),
1697                             (long long unsigned int)
1698                             pci_dma_lo32(sg_dma_address(prm->sg)),
1699                             (int)sg_dma_len(prm->sg));
1700
1701                         prm->sg = sg_next(prm->sg);
1702                 }
1703         }
1704 }
1705
1706 /*
1707  * ha->hardware_lock supposed to be held on entry. We have already made sure
1708  * that there is sufficient amount of request entries to not drop it.
1709  */
1710 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1711         struct scsi_qla_host *vha)
1712 {
1713         int cnt;
1714         uint32_t *dword_ptr;
1715         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1716         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1717
1718         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1719             "iocb->scsi_status=%x, iocb->flags=%x\n",
1720             le16_to_cpu(pkt24->u.status0.scsi_status),
1721             le16_to_cpu(pkt24->u.status0.flags));
1722
1723         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1724
1725         /* Setup packet address segment pointer */
1726         dword_ptr = pkt24->u.status0.dseg_0_address;
1727
1728         /* Set total data segment count */
1729         if (prm->seg_cnt)
1730                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1731
1732         if (prm->seg_cnt == 0) {
1733                 /* No data transfer */
1734                 *dword_ptr++ = 0;
1735                 *dword_ptr = 0;
1736                 return;
1737         }
1738
1739         /* If scatter gather */
1740         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1741
1742         /* Load command entry data segments */
1743         for (cnt = 0;
1744             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1745             cnt++, prm->seg_cnt--) {
1746                 *dword_ptr++ =
1747                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1748                 if (enable_64bit_addressing) {
1749                         *dword_ptr++ =
1750                             cpu_to_le32(pci_dma_hi32(
1751                                 sg_dma_address(prm->sg)));
1752                 }
1753                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1754
1755                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1756                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1757                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1758                     prm->sg)),
1759                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1760                     prm->sg)),
1761                     (int)sg_dma_len(prm->sg));
1762
1763                 prm->sg = sg_next(prm->sg);
1764         }
1765
1766         qlt_load_cont_data_segments(prm, vha);
1767 }
1768
1769 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1770 {
1771         return cmd->bufflen > 0;
1772 }
1773
1774 /*
1775  * Called without ha->hardware_lock held
1776  */
1777 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1778         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1779         uint32_t *full_req_cnt)
1780 {
1781         struct qla_tgt *tgt = cmd->tgt;
1782         struct scsi_qla_host *vha = tgt->vha;
1783         struct qla_hw_data *ha = vha->hw;
1784         struct se_cmd *se_cmd = &cmd->se_cmd;
1785
1786         if (unlikely(cmd->aborted)) {
1787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1788                     "qla_target(%d): terminating exchange "
1789                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1790                     se_cmd, cmd->tag);
1791
1792                 cmd->state = QLA_TGT_STATE_ABORTED;
1793
1794                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1795
1796                 /* !! At this point cmd could be already freed !! */
1797                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1798         }
1799
1800         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1801             vha->vp_idx, cmd->tag);
1802
1803         prm->cmd = cmd;
1804         prm->tgt = tgt;
1805         prm->rq_result = scsi_status;
1806         prm->sense_buffer = &cmd->sense_buffer[0];
1807         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1808         prm->sg = NULL;
1809         prm->seg_cnt = -1;
1810         prm->req_cnt = 1;
1811         prm->add_status_pkt = 0;
1812
1813         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1814             prm->rq_result, xmit_type);
1815
1816         /* Send marker if required */
1817         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1818                 return -EFAULT;
1819
1820         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1821
1822         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1823                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1824                         return -EAGAIN;
1825         }
1826
1827         *full_req_cnt = prm->req_cnt;
1828
1829         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1830                 prm->residual = se_cmd->residual_count;
1831                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1832                     "Residual underflow: %d (tag %d, "
1833                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1834                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1835                     cmd->bufflen, prm->rq_result);
1836                 prm->rq_result |= SS_RESIDUAL_UNDER;
1837         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1838                 prm->residual = se_cmd->residual_count;
1839                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1840                     "Residual overflow: %d (tag %d, "
1841                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1842                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1843                     cmd->bufflen, prm->rq_result);
1844                 prm->rq_result |= SS_RESIDUAL_OVER;
1845         }
1846
1847         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1848                 /*
1849                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1850                  * ignored in *xmit_response() below
1851                  */
1852                 if (qlt_has_data(cmd)) {
1853                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1854                             (IS_FWI2_CAPABLE(ha) &&
1855                             (prm->rq_result != 0))) {
1856                                 prm->add_status_pkt = 1;
1857                                 (*full_req_cnt)++;
1858                         }
1859                 }
1860         }
1861
1862         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1863             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1864             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1865
1866         return 0;
1867 }
1868
1869 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1870         struct qla_tgt_cmd *cmd, int sending_sense)
1871 {
1872         if (ha->tgt.enable_class_2)
1873                 return 0;
1874
1875         if (sending_sense)
1876                 return cmd->conf_compl_supported;
1877         else
1878                 return ha->tgt.enable_explicit_conf &&
1879                     cmd->conf_compl_supported;
1880 }
1881
1882 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1883 /*
1884  *  Original taken from the XFS code
1885  */
1886 static unsigned long qlt_srr_random(void)
1887 {
1888         static int Inited;
1889         static unsigned long RandomValue;
1890         static DEFINE_SPINLOCK(lock);
1891         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1892         register long rv;
1893         register long lo;
1894         register long hi;
1895         unsigned long flags;
1896
1897         spin_lock_irqsave(&lock, flags);
1898         if (!Inited) {
1899                 RandomValue = jiffies;
1900                 Inited = 1;
1901         }
1902         rv = RandomValue;
1903         hi = rv / 127773;
1904         lo = rv % 127773;
1905         rv = 16807 * lo - 2836 * hi;
1906         if (rv <= 0)
1907                 rv += 2147483647;
1908         RandomValue = rv;
1909         spin_unlock_irqrestore(&lock, flags);
1910         return rv;
1911 }
1912
1913 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1914 {
1915 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1916         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1917             == 50) {
1918                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1919                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1920                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1921         }
1922 #endif
1923         /*
1924          * It's currently not possible to simulate SRRs for FCP_WRITE without
1925          * a physical link layer failure, so don't even try here..
1926          */
1927         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1928                 return;
1929
1930         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1931             ((qlt_srr_random() % 100) == 20)) {
1932                 int i, leave = 0;
1933                 unsigned int tot_len = 0;
1934
1935                 while (leave == 0)
1936                         leave = qlt_srr_random() % cmd->sg_cnt;
1937
1938                 for (i = 0; i < leave; i++)
1939                         tot_len += cmd->sg[i].length;
1940
1941                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1942                     "Cutting cmd %p (tag %d) buffer"
1943                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1944                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1945                     cmd->bufflen, cmd->sg_cnt);
1946
1947                 cmd->bufflen = tot_len;
1948                 cmd->sg_cnt = leave;
1949         }
1950
1951         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1952                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1953
1954                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1955                     "Cutting cmd %p (tag %d) buffer head "
1956                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1957                     cmd->bufflen);
1958                 if (offset == 0)
1959                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1960                 else if (qlt_set_data_offset(cmd, offset)) {
1961                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1962                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1963                 }
1964         }
1965 }
1966 #else
1967 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1968 {}
1969 #endif
1970
1971 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1972         struct qla_tgt_prm *prm)
1973 {
1974         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1975             (uint32_t)sizeof(ctio->u.status1.sense_data));
1976         ctio->u.status0.flags |=
1977             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1978         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1979                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1980                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1981                     CTIO7_FLAGS_CONFORM_REQ);
1982         }
1983         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1984         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1985         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1986                 int i;
1987
1988                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1989                         if (prm->cmd->se_cmd.scsi_status != 0) {
1990                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1991                                     "Skipping EXPLICIT_CONFORM and "
1992                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1993                                     "non GOOD status\n");
1994                                 goto skip_explict_conf;
1995                         }
1996                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1997                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1998                             CTIO7_FLAGS_CONFORM_REQ);
1999                 }
2000 skip_explict_conf:
2001                 ctio->u.status1.flags &=
2002                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2003                 ctio->u.status1.flags |=
2004                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2005                 ctio->u.status1.scsi_status |=
2006                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2007                 ctio->u.status1.sense_length =
2008                     cpu_to_le16(prm->sense_buffer_len);
2009                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2010                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2011                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2012 #if 0
2013                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2014                         static int q;
2015                         if (q < 10) {
2016                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2017                                     "qla_target(%d): %d bytes of sense "
2018                                     "lost", prm->tgt->ha->vp_idx,
2019                                     prm->sense_buffer_len % 4);
2020                                 q++;
2021                         }
2022                 }
2023 #endif
2024         } else {
2025                 ctio->u.status1.flags &=
2026                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2027                 ctio->u.status1.flags |=
2028                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2029                 ctio->u.status1.sense_length = 0;
2030                 memset(ctio->u.status1.sense_data, 0,
2031                     sizeof(ctio->u.status1.sense_data));
2032         }
2033
2034         /* Sense with len > 24, is it possible ??? */
2035 }
2036
2037 /*
2038  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2039  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2040  */
2041 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2042         uint8_t scsi_status)
2043 {
2044         struct scsi_qla_host *vha = cmd->vha;
2045         struct qla_hw_data *ha = vha->hw;
2046         struct ctio7_to_24xx *pkt;
2047         struct qla_tgt_prm prm;
2048         uint32_t full_req_cnt = 0;
2049         unsigned long flags = 0;
2050         int res;
2051
2052         memset(&prm, 0, sizeof(prm));
2053         qlt_check_srr_debug(cmd, &xmit_type);
2054
2055         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2056             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2057             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2058             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2059
2060         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2061             &full_req_cnt);
2062         if (unlikely(res != 0)) {
2063                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2064                         return 0;
2065
2066                 return res;
2067         }
2068
2069         spin_lock_irqsave(&ha->hardware_lock, flags);
2070
2071         /* Does F/W have an IOCBs for this request */
2072         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2073         if (unlikely(res))
2074                 goto out_unmap_unlock;
2075
2076         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2077         if (unlikely(res != 0))
2078                 goto out_unmap_unlock;
2079
2080
2081         pkt = (struct ctio7_to_24xx *)prm.pkt;
2082
2083         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2084                 pkt->u.status0.flags |=
2085                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2086                         CTIO7_FLAGS_STATUS_MODE_0);
2087
2088                 qlt_load_data_segments(&prm, vha);
2089
2090                 if (prm.add_status_pkt == 0) {
2091                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2092                                 pkt->u.status0.scsi_status =
2093                                     cpu_to_le16(prm.rq_result);
2094                                 pkt->u.status0.residual =
2095                                     cpu_to_le32(prm.residual);
2096                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2097                                     CTIO7_FLAGS_SEND_STATUS);
2098                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2099                                         pkt->u.status0.flags |=
2100                                             __constant_cpu_to_le16(
2101                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2102                                                 CTIO7_FLAGS_CONFORM_REQ);
2103                                 }
2104                         }
2105
2106                 } else {
2107                         /*
2108                          * We have already made sure that there is sufficient
2109                          * amount of request entries to not drop HW lock in
2110                          * req_pkt().
2111                          */
2112                         struct ctio7_to_24xx *ctio =
2113                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2114
2115                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2116                             "Building additional status packet\n");
2117
2118                         memcpy(ctio, pkt, sizeof(*ctio));
2119                         ctio->entry_count = 1;
2120                         ctio->dseg_count = 0;
2121                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2122                             CTIO7_FLAGS_DATA_IN);
2123
2124                         /* Real finish is ctio_m1's finish */
2125                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2126                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2127                             CTIO7_FLAGS_DONT_RET_CTIO);
2128                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2129                             &prm);
2130                         pr_debug("Status CTIO7: %p\n", ctio);
2131                 }
2132         } else
2133                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2134
2135
2136         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2137
2138         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2139             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2140             pkt, scsi_status);
2141
2142         qla2x00_start_iocbs(vha, vha->req);
2143         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2144
2145         return 0;
2146
2147 out_unmap_unlock:
2148         if (cmd->sg_mapped)
2149                 qlt_unmap_sg(vha, cmd);
2150         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2151
2152         return res;
2153 }
2154 EXPORT_SYMBOL(qlt_xmit_response);
2155
2156 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2157 {
2158         struct ctio7_to_24xx *pkt;
2159         struct scsi_qla_host *vha = cmd->vha;
2160         struct qla_hw_data *ha = vha->hw;
2161         struct qla_tgt *tgt = cmd->tgt;
2162         struct qla_tgt_prm prm;
2163         unsigned long flags;
2164         int res = 0;
2165
2166         memset(&prm, 0, sizeof(prm));
2167         prm.cmd = cmd;
2168         prm.tgt = tgt;
2169         prm.sg = NULL;
2170         prm.req_cnt = 1;
2171
2172         /* Send marker if required */
2173         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2174                 return -EIO;
2175
2176         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2177             (int)vha->vp_idx);
2178
2179         /* Calculate number of entries and segments required */
2180         if (qlt_pci_map_calc_cnt(&prm) != 0)
2181                 return -EAGAIN;
2182
2183         spin_lock_irqsave(&ha->hardware_lock, flags);
2184
2185         /* Does F/W have an IOCBs for this request */
2186         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2187         if (res != 0)
2188                 goto out_unlock_free_unmap;
2189
2190         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2191         if (unlikely(res != 0))
2192                 goto out_unlock_free_unmap;
2193         pkt = (struct ctio7_to_24xx *)prm.pkt;
2194         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2195             CTIO7_FLAGS_STATUS_MODE_0);
2196         qlt_load_data_segments(&prm, vha);
2197
2198         cmd->state = QLA_TGT_STATE_NEED_DATA;
2199
2200         qla2x00_start_iocbs(vha, vha->req);
2201         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2202
2203         return res;
2204
2205 out_unlock_free_unmap:
2206         if (cmd->sg_mapped)
2207                 qlt_unmap_sg(vha, cmd);
2208         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2209
2210         return res;
2211 }
2212 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2213
2214 /* If hardware_lock held on entry, might drop it, then reaquire */
2215 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2216 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2217         struct qla_tgt_cmd *cmd,
2218         struct atio_from_isp *atio)
2219 {
2220         struct ctio7_to_24xx *ctio24;
2221         struct qla_hw_data *ha = vha->hw;
2222         request_t *pkt;
2223         int ret = 0;
2224
2225         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2226
2227         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2228         if (pkt == NULL) {
2229                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2230                     "qla_target(%d): %s failed: unable to allocate "
2231                     "request packet\n", vha->vp_idx, __func__);
2232                 return -ENOMEM;
2233         }
2234
2235         if (cmd != NULL) {
2236                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2237                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2238                             "qla_target(%d): Terminating cmd %p with "
2239                             "incorrect state %d\n", vha->vp_idx, cmd,
2240                             cmd->state);
2241                 } else
2242                         ret = 1;
2243         }
2244
2245         pkt->entry_count = 1;
2246         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2247
2248         ctio24 = (struct ctio7_to_24xx *)pkt;
2249         ctio24->entry_type = CTIO_TYPE7;
2250         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2251         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2252         ctio24->vp_index = vha->vp_idx;
2253         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2254         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2255         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2256         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2257         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2258             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2259                 CTIO7_FLAGS_TERMINATE);
2260         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2261
2262         /* Most likely, it isn't needed */
2263         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2264             &atio->u.isp24.fcp_cmnd.add_cdb[
2265             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2266         if (ctio24->u.status1.residual != 0)
2267                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2268
2269         qla2x00_start_iocbs(vha, vha->req);
2270         return ret;
2271 }
2272
2273 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2274         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2275 {
2276         unsigned long flags;
2277         int rc;
2278
2279         if (qlt_issue_marker(vha, ha_locked) < 0)
2280                 return;
2281
2282         if (ha_locked) {
2283                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2284                 goto done;
2285         }
2286         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2287         rc = __qlt_send_term_exchange(vha, cmd, atio);
2288         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2289 done:
2290         if (rc == 1) {
2291                 if (!ha_locked && !in_interrupt())
2292                         msleep(250); /* just in case */
2293
2294                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2295         }
2296 }
2297
2298 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2299 {
2300         BUG_ON(cmd->sg_mapped);
2301
2302         if (unlikely(cmd->free_sg))
2303                 kfree(cmd->sg);
2304         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2305 }
2306 EXPORT_SYMBOL(qlt_free_cmd);
2307
2308 /* ha->hardware_lock supposed to be held on entry */
2309 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2310         struct qla_tgt_cmd *cmd, void *ctio)
2311 {
2312         struct qla_tgt_srr_ctio *sc;
2313         struct qla_hw_data *ha = vha->hw;
2314         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2315         struct qla_tgt_srr_imm *imm;
2316
2317         tgt->ctio_srr_id++;
2318
2319         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2320             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2321
2322         if (!ctio) {
2323                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2324                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2325                     vha->vp_idx);
2326                 return -EINVAL;
2327         }
2328
2329         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2330         if (sc != NULL) {
2331                 sc->cmd = cmd;
2332                 /* IRQ is already OFF */
2333                 spin_lock(&tgt->srr_lock);
2334                 sc->srr_id = tgt->ctio_srr_id;
2335                 list_add_tail(&sc->srr_list_entry,
2336                     &tgt->srr_ctio_list);
2337                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2338                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2339                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2340                         int found = 0;
2341                         list_for_each_entry(imm, &tgt->srr_imm_list,
2342                             srr_list_entry) {
2343                                 if (imm->srr_id == sc->srr_id) {
2344                                         found = 1;
2345                                         break;
2346                                 }
2347                         }
2348                         if (found) {
2349                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2350                                     "Scheduling srr work\n");
2351                                 schedule_work(&tgt->srr_work);
2352                         } else {
2353                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2354                                     "qla_target(%d): imm_srr_id "
2355                                     "== ctio_srr_id (%d), but there is no "
2356                                     "corresponding SRR IMM, deleting CTIO "
2357                                     "SRR %p\n", vha->vp_idx,
2358                                     tgt->ctio_srr_id, sc);
2359                                 list_del(&sc->srr_list_entry);
2360                                 spin_unlock(&tgt->srr_lock);
2361
2362                                 kfree(sc);
2363                                 return -EINVAL;
2364                         }
2365                 }
2366                 spin_unlock(&tgt->srr_lock);
2367         } else {
2368                 struct qla_tgt_srr_imm *ti;
2369
2370                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2371                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2372                     vha->vp_idx);
2373                 spin_lock(&tgt->srr_lock);
2374                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2375                     srr_list_entry) {
2376                         if (imm->srr_id == tgt->ctio_srr_id) {
2377                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2378                                     "IMM SRR %p deleted (id %d)\n",
2379                                     imm, imm->srr_id);
2380                                 list_del(&imm->srr_list_entry);
2381                                 qlt_reject_free_srr_imm(vha, imm, 1);
2382                         }
2383                 }
2384                 spin_unlock(&tgt->srr_lock);
2385
2386                 return -ENOMEM;
2387         }
2388
2389         return 0;
2390 }
2391
2392 /*
2393  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2394  */
2395 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2396         struct qla_tgt_cmd *cmd, uint32_t status)
2397 {
2398         int term = 0;
2399
2400         if (ctio != NULL) {
2401                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2402                 term = !(c->flags &
2403                     __constant_cpu_to_le16(OF_TERM_EXCH));
2404         } else
2405                 term = 1;
2406
2407         if (term)
2408                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2409
2410         return term;
2411 }
2412
2413 /* ha->hardware_lock supposed to be held on entry */
2414 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2415         uint32_t handle)
2416 {
2417         struct qla_hw_data *ha = vha->hw;
2418
2419         handle--;
2420         if (ha->tgt.cmds[handle] != NULL) {
2421                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2422                 ha->tgt.cmds[handle] = NULL;
2423                 return cmd;
2424         } else
2425                 return NULL;
2426 }
2427
2428 /* ha->hardware_lock supposed to be held on entry */
2429 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2430         uint32_t handle, void *ctio)
2431 {
2432         struct qla_tgt_cmd *cmd = NULL;
2433
2434         /* Clear out internal marks */
2435         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2436             CTIO_INTERMEDIATE_HANDLE_MARK);
2437
2438         if (handle != QLA_TGT_NULL_HANDLE) {
2439                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2440                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2441                             "SKIP_HANDLE CTIO\n");
2442                         return NULL;
2443                 }
2444                 /* handle-1 is actually used */
2445                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2446                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2447                             "qla_target(%d): Wrong handle %x received\n",
2448                             vha->vp_idx, handle);
2449                         return NULL;
2450                 }
2451                 cmd = qlt_get_cmd(vha, handle);
2452                 if (unlikely(cmd == NULL)) {
2453                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2454                             "qla_target(%d): Suspicious: unable to "
2455                             "find the command with handle %x\n", vha->vp_idx,
2456                             handle);
2457                         return NULL;
2458                 }
2459         } else if (ctio != NULL) {
2460                 /* We can't get loop ID from CTIO7 */
2461                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2462                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2463                     "support NULL handles\n", vha->vp_idx);
2464                 return NULL;
2465         }
2466
2467         return cmd;
2468 }
2469
2470 /*
2471  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2472  */
2473 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2474         uint32_t status, void *ctio)
2475 {
2476         struct qla_hw_data *ha = vha->hw;
2477         struct se_cmd *se_cmd;
2478         struct target_core_fabric_ops *tfo;
2479         struct qla_tgt_cmd *cmd;
2480
2481         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2482             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2483             vha->vp_idx, ctio, status, handle);
2484
2485         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2486                 /* That could happen only in case of an error/reset/abort */
2487                 if (status != CTIO_SUCCESS) {
2488                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2489                             "Intermediate CTIO received"
2490                             " (status %x)\n", status);
2491                 }
2492                 return;
2493         }
2494
2495         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2496         if (cmd == NULL)
2497                 return;
2498
2499         se_cmd = &cmd->se_cmd;
2500         tfo = se_cmd->se_tfo;
2501
2502         if (cmd->sg_mapped)
2503                 qlt_unmap_sg(vha, cmd);
2504
2505         if (unlikely(status != CTIO_SUCCESS)) {
2506                 switch (status & 0xFFFF) {
2507                 case CTIO_LIP_RESET:
2508                 case CTIO_TARGET_RESET:
2509                 case CTIO_ABORTED:
2510                 case CTIO_TIMEOUT:
2511                 case CTIO_INVALID_RX_ID:
2512                         /* They are OK */
2513                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2514                             "qla_target(%d): CTIO with "
2515                             "status %#x received, state %x, se_cmd %p, "
2516                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2517                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2518                             status, cmd->state, se_cmd);
2519                         break;
2520
2521                 case CTIO_PORT_LOGGED_OUT:
2522                 case CTIO_PORT_UNAVAILABLE:
2523                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2524                             "qla_target(%d): CTIO with PORT LOGGED "
2525                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2526                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2527                             status, cmd->state, se_cmd);
2528                         break;
2529
2530                 case CTIO_SRR_RECEIVED:
2531                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2532                             "qla_target(%d): CTIO with SRR_RECEIVED"
2533                             " status %x received (state %x, se_cmd %p)\n",
2534                             vha->vp_idx, status, cmd->state, se_cmd);
2535                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2536                                 break;
2537                         else
2538                                 return;
2539
2540                 default:
2541                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2542                             "qla_target(%d): CTIO with error status "
2543                             "0x%x received (state %x, se_cmd %p\n",
2544                             vha->vp_idx, status, cmd->state, se_cmd);
2545                         break;
2546                 }
2547
2548                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2549                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2550                                 return;
2551         }
2552
2553         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2554                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2555         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2556                 int rx_status = 0;
2557
2558                 cmd->state = QLA_TGT_STATE_DATA_IN;
2559
2560                 if (unlikely(status != CTIO_SUCCESS))
2561                         rx_status = -EIO;
2562                 else
2563                         cmd->write_data_transferred = 1;
2564
2565                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2566                     "Data received, context %x, rx_status %d\n",
2567                     0x0, rx_status);
2568
2569                 ha->tgt.tgt_ops->handle_data(cmd);
2570                 return;
2571         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2572                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2573                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2574         } else {
2575                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2576                     "qla_target(%d): A command in state (%d) should "
2577                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2578         }
2579
2580         if (unlikely(status != CTIO_SUCCESS)) {
2581                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2582                 dump_stack();
2583         }
2584
2585         ha->tgt.tgt_ops->free_cmd(cmd);
2586 }
2587
2588 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2589         uint8_t task_codes)
2590 {
2591         int fcp_task_attr;
2592
2593         switch (task_codes) {
2594         case ATIO_SIMPLE_QUEUE:
2595                 fcp_task_attr = MSG_SIMPLE_TAG;
2596                 break;
2597         case ATIO_HEAD_OF_QUEUE:
2598                 fcp_task_attr = MSG_HEAD_TAG;
2599                 break;
2600         case ATIO_ORDERED_QUEUE:
2601                 fcp_task_attr = MSG_ORDERED_TAG;
2602                 break;
2603         case ATIO_ACA_QUEUE:
2604                 fcp_task_attr = MSG_ACA_TAG;
2605                 break;
2606         case ATIO_UNTAGGED:
2607                 fcp_task_attr = MSG_SIMPLE_TAG;
2608                 break;
2609         default:
2610                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2611                     "qla_target: unknown task code %x, use ORDERED instead\n",
2612                     task_codes);
2613                 fcp_task_attr = MSG_ORDERED_TAG;
2614                 break;
2615         }
2616
2617         return fcp_task_attr;
2618 }
2619
2620 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2621                                         uint8_t *);
2622 /*
2623  * Process context for I/O path into tcm_qla2xxx code
2624  */
2625 static void qlt_do_work(struct work_struct *work)
2626 {
2627         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2628         scsi_qla_host_t *vha = cmd->vha;
2629         struct qla_hw_data *ha = vha->hw;
2630         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2631         struct qla_tgt_sess *sess = NULL;
2632         struct atio_from_isp *atio = &cmd->atio;
2633         unsigned char *cdb;
2634         unsigned long flags;
2635         uint32_t data_length;
2636         int ret, fcp_task_attr, data_dir, bidi = 0;
2637
2638         if (tgt->tgt_stop)
2639                 goto out_term;
2640
2641         spin_lock_irqsave(&ha->hardware_lock, flags);
2642         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2643             atio->u.isp24.fcp_hdr.s_id);
2644         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2645         if (sess)
2646                 kref_get(&sess->se_sess->sess_kref);
2647         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2648
2649         if (unlikely(!sess)) {
2650                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2651
2652                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2653                         "qla_target(%d): Unable to find wwn login"
2654                         " (s_id %x:%x:%x), trying to create it manually\n",
2655                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2656
2657                 if (atio->u.raw.entry_count > 1) {
2658                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2659                                 "Dropping multy entry cmd %p\n", cmd);
2660                         goto out_term;
2661                 }
2662
2663                 mutex_lock(&ha->tgt.tgt_mutex);
2664                 sess = qlt_make_local_sess(vha, s_id);
2665                 /* sess has an extra creation ref. */
2666                 mutex_unlock(&ha->tgt.tgt_mutex);
2667
2668                 if (!sess)
2669                         goto out_term;
2670         }
2671
2672         cmd->sess = sess;
2673         cmd->loop_id = sess->loop_id;
2674         cmd->conf_compl_supported = sess->conf_compl_supported;
2675
2676         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2677         cmd->tag = atio->u.isp24.exchange_addr;
2678         cmd->unpacked_lun = scsilun_to_int(
2679             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2680
2681         if (atio->u.isp24.fcp_cmnd.rddata &&
2682             atio->u.isp24.fcp_cmnd.wrdata) {
2683                 bidi = 1;
2684                 data_dir = DMA_TO_DEVICE;
2685         } else if (atio->u.isp24.fcp_cmnd.rddata)
2686                 data_dir = DMA_FROM_DEVICE;
2687         else if (atio->u.isp24.fcp_cmnd.wrdata)
2688                 data_dir = DMA_TO_DEVICE;
2689         else
2690                 data_dir = DMA_NONE;
2691
2692         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2693             atio->u.isp24.fcp_cmnd.task_attr);
2694         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2695             &atio->u.isp24.fcp_cmnd.add_cdb[
2696             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2697
2698         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2699             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2700             cmd, cmd->unpacked_lun, cmd->tag);
2701
2702         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2703             fcp_task_attr, data_dir, bidi);
2704         if (ret != 0)
2705                 goto out_term;
2706         /*
2707          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2708          */
2709         ha->tgt.tgt_ops->put_sess(sess);
2710         return;
2711
2712 out_term:
2713         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2714         /*
2715          * cmd has not sent to target yet, so pass NULL as the second
2716          * argument to qlt_send_term_exchange() and free the memory here.
2717          */
2718         spin_lock_irqsave(&ha->hardware_lock, flags);
2719         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2720         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2721         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2722         if (sess)
2723                 ha->tgt.tgt_ops->put_sess(sess);
2724 }
2725
2726 /* ha->hardware_lock supposed to be held on entry */
2727 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2728         struct atio_from_isp *atio)
2729 {
2730         struct qla_hw_data *ha = vha->hw;
2731         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2732         struct qla_tgt_cmd *cmd;
2733
2734         if (unlikely(tgt->tgt_stop)) {
2735                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2736                     "New command while device %p is shutting down\n", tgt);
2737                 return -EFAULT;
2738         }
2739
2740         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2741         if (!cmd) {
2742                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2743                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2744                 return -ENOMEM;
2745         }
2746
2747         INIT_LIST_HEAD(&cmd->cmd_list);
2748
2749         memcpy(&cmd->atio, atio, sizeof(*atio));
2750         cmd->state = QLA_TGT_STATE_NEW;
2751         cmd->tgt = ha->tgt.qla_tgt;
2752         cmd->vha = vha;
2753
2754         INIT_WORK(&cmd->work, qlt_do_work);
2755         queue_work(qla_tgt_wq, &cmd->work);
2756         return 0;
2757
2758 }
2759
2760 /* ha->hardware_lock supposed to be held on entry */
2761 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2762         int fn, void *iocb, int flags)
2763 {
2764         struct scsi_qla_host *vha = sess->vha;
2765         struct qla_hw_data *ha = vha->hw;
2766         struct qla_tgt_mgmt_cmd *mcmd;
2767         int res;
2768         uint8_t tmr_func;
2769
2770         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2771         if (!mcmd) {
2772                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2773                     "qla_target(%d): Allocation of management "
2774                     "command failed, some commands and their data could "
2775                     "leak\n", vha->vp_idx);
2776                 return -ENOMEM;
2777         }
2778         memset(mcmd, 0, sizeof(*mcmd));
2779         mcmd->sess = sess;
2780
2781         if (iocb) {
2782                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2783                     sizeof(mcmd->orig_iocb.imm_ntfy));
2784         }
2785         mcmd->tmr_func = fn;
2786         mcmd->flags = flags;
2787
2788         switch (fn) {
2789         case QLA_TGT_CLEAR_ACA:
2790                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2791                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2792                 tmr_func = TMR_CLEAR_ACA;
2793                 break;
2794
2795         case QLA_TGT_TARGET_RESET:
2796                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2797                     "qla_target(%d): TARGET_RESET received\n",
2798                     sess->vha->vp_idx);
2799                 tmr_func = TMR_TARGET_WARM_RESET;
2800                 break;
2801
2802         case QLA_TGT_LUN_RESET:
2803                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2804                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2805                 tmr_func = TMR_LUN_RESET;
2806                 break;
2807
2808         case QLA_TGT_CLEAR_TS:
2809                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2810                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2811                 tmr_func = TMR_CLEAR_TASK_SET;
2812                 break;
2813
2814         case QLA_TGT_ABORT_TS:
2815                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2816                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2817                 tmr_func = TMR_ABORT_TASK_SET;
2818                 break;
2819 #if 0
2820         case QLA_TGT_ABORT_ALL:
2821                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2822                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2823                     sess->vha->vp_idx);
2824                 tmr_func = 0;
2825                 break;
2826
2827         case QLA_TGT_ABORT_ALL_SESS:
2828                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2829                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2830                     sess->vha->vp_idx);
2831                 tmr_func = 0;
2832                 break;
2833
2834         case QLA_TGT_NEXUS_LOSS_SESS:
2835                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2836                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2837                     sess->vha->vp_idx);
2838                 tmr_func = 0;
2839                 break;
2840
2841         case QLA_TGT_NEXUS_LOSS:
2842                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2843                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2844                 tmr_func = 0;
2845                 break;
2846 #endif
2847         default:
2848                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2849                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2850                     sess->vha->vp_idx, fn);
2851                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2852                 return -ENOSYS;
2853         }
2854
2855         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2856         if (res != 0) {
2857                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2858                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2859                     sess->vha->vp_idx, res);
2860                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2861                 return -EFAULT;
2862         }
2863
2864         return 0;
2865 }
2866
2867 /* ha->hardware_lock supposed to be held on entry */
2868 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2869 {
2870         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2871         struct qla_hw_data *ha = vha->hw;
2872         struct qla_tgt *tgt;
2873         struct qla_tgt_sess *sess;
2874         uint32_t lun, unpacked_lun;
2875         int lun_size, fn;
2876
2877         tgt = ha->tgt.qla_tgt;
2878
2879         lun = a->u.isp24.fcp_cmnd.lun;
2880         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2881         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2882         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2883             a->u.isp24.fcp_hdr.s_id);
2884         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2885
2886         if (!sess) {
2887                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2888                     "qla_target(%d): task mgmt fn 0x%x for "
2889                     "non-existant session\n", vha->vp_idx, fn);
2890                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2891                     sizeof(struct atio_from_isp));
2892         }
2893
2894         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2895 }
2896
2897 /* ha->hardware_lock supposed to be held on entry */
2898 static int __qlt_abort_task(struct scsi_qla_host *vha,
2899         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2900 {
2901         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2902         struct qla_hw_data *ha = vha->hw;
2903         struct qla_tgt_mgmt_cmd *mcmd;
2904         uint32_t lun, unpacked_lun;
2905         int rc;
2906
2907         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2908         if (mcmd == NULL) {
2909                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2910                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2911                     vha->vp_idx, __func__);
2912                 return -ENOMEM;
2913         }
2914         memset(mcmd, 0, sizeof(*mcmd));
2915
2916         mcmd->sess = sess;
2917         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2918             sizeof(mcmd->orig_iocb.imm_ntfy));
2919
2920         lun = a->u.isp24.fcp_cmnd.lun;
2921         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2922
2923         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2924             le16_to_cpu(iocb->u.isp2x.seq_id));
2925         if (rc != 0) {
2926                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2927                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2928                     vha->vp_idx, rc);
2929                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2930                 return -EFAULT;
2931         }
2932
2933         return 0;
2934 }
2935
2936 /* ha->hardware_lock supposed to be held on entry */
2937 static int qlt_abort_task(struct scsi_qla_host *vha,
2938         struct imm_ntfy_from_isp *iocb)
2939 {
2940         struct qla_hw_data *ha = vha->hw;
2941         struct qla_tgt_sess *sess;
2942         int loop_id;
2943
2944         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2945
2946         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2947         if (sess == NULL) {
2948                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2949                     "qla_target(%d): task abort for unexisting "
2950                     "session\n", vha->vp_idx);
2951                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2952                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2953         }
2954
2955         return __qlt_abort_task(vha, iocb, sess);
2956 }
2957
2958 /*
2959  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2960  */
2961 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2962         struct imm_ntfy_from_isp *iocb)
2963 {
2964         struct qla_hw_data *ha = vha->hw;
2965         int res = 0;
2966
2967         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2968             "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2969             " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2970             iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2971             iocb->u.isp24.status_subcode);
2972
2973         switch (iocb->u.isp24.status_subcode) {
2974         case ELS_PLOGI:
2975         case ELS_FLOGI:
2976         case ELS_PRLI:
2977         case ELS_LOGO:
2978         case ELS_PRLO:
2979                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2980                 break;
2981         case ELS_PDISC:
2982         case ELS_ADISC:
2983         {
2984                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2985                 if (tgt->link_reinit_iocb_pending) {
2986                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2987                             0, 0, 0, 0, 0, 0);
2988                         tgt->link_reinit_iocb_pending = 0;
2989                 }
2990                 res = 1; /* send notify ack */
2991                 break;
2992         }
2993
2994         default:
2995                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2996                     "qla_target(%d): Unsupported ELS command %x "
2997                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2998                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2999                 break;
3000         }
3001
3002         return res;
3003 }
3004
3005 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3006 {
3007         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3008         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3009         int i, sg_srr_cnt, bufflen = 0;
3010
3011         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3012             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3013             "cmd->sg_cnt: %u, direction: %d\n",
3014             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3015
3016         /*
3017          * FIXME: Reject non zero SRR relative offset until we can test
3018          * this code properly.
3019          */
3020         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3021         return -1;
3022
3023         if (!cmd->sg || !cmd->sg_cnt) {
3024                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3025                     "Missing cmd->sg or zero cmd->sg_cnt in"
3026                     " qla_tgt_set_data_offset\n");
3027                 return -EINVAL;
3028         }
3029         /*
3030          * Walk the current cmd->sg list until we locate the new sg_srr_start
3031          */
3032         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3033                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3034                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3035                     i, sg, sg_page(sg), sg->length, sg->offset);
3036
3037                 if ((sg->length + tmp) > offset) {
3038                         first_offset = rem_offset;
3039                         sg_srr_start = sg;
3040                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3041                             "Found matching sg[%d], using %p as sg_srr_start, "
3042                             "and using first_offset: %zu\n", i, sg,
3043                             first_offset);
3044                         break;
3045                 }
3046                 tmp += sg->length;
3047                 rem_offset -= sg->length;
3048         }
3049
3050         if (!sg_srr_start) {
3051                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3052                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3053                 return -EINVAL;
3054         }
3055         sg_srr_cnt = (cmd->sg_cnt - i);
3056
3057         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3058         if (!sg_srr) {
3059                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3060                     "Unable to allocate sgp\n");
3061                 return -ENOMEM;
3062         }
3063         sg_init_table(sg_srr, sg_srr_cnt);
3064         sgp = &sg_srr[0];
3065         /*
3066          * Walk the remaining list for sg_srr_start, mapping to the newly
3067          * allocated sg_srr taking first_offset into account.
3068          */
3069         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3070                 if (first_offset) {
3071                         sg_set_page(sgp, sg_page(sg),
3072                             (sg->length - first_offset), first_offset);
3073                         first_offset = 0;
3074                 } else {
3075                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3076                 }
3077                 bufflen += sgp->length;
3078
3079                 sgp = sg_next(sgp);
3080                 if (!sgp)
3081                         break;
3082         }
3083
3084         cmd->sg = sg_srr;
3085         cmd->sg_cnt = sg_srr_cnt;
3086         cmd->bufflen = bufflen;
3087         cmd->offset += offset;
3088         cmd->free_sg = 1;
3089
3090         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3091         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3092             cmd->sg_cnt);
3093         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3094             cmd->bufflen);
3095         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3096             cmd->offset);
3097
3098         if (cmd->sg_cnt < 0)
3099                 BUG();
3100
3101         if (cmd->bufflen < 0)
3102                 BUG();
3103
3104         return 0;
3105 }
3106
3107 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3108         uint32_t srr_rel_offs, int *xmit_type)
3109 {
3110         int res = 0, rel_offs;
3111
3112         rel_offs = srr_rel_offs - cmd->offset;
3113         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3114             srr_rel_offs, rel_offs);
3115
3116         *xmit_type = QLA_TGT_XMIT_ALL;
3117
3118         if (rel_offs < 0) {
3119                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3120                     "qla_target(%d): SRR rel_offs (%d) < 0",
3121                     cmd->vha->vp_idx, rel_offs);
3122                 res = -1;
3123         } else if (rel_offs == cmd->bufflen)
3124                 *xmit_type = QLA_TGT_XMIT_STATUS;
3125         else if (rel_offs > 0)
3126                 res = qlt_set_data_offset(cmd, rel_offs);
3127
3128         return res;
3129 }
3130
3131 /* No locks, thread context */
3132 static void qlt_handle_srr(struct scsi_qla_host *vha,
3133         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3134 {
3135         struct imm_ntfy_from_isp *ntfy =
3136             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3137         struct qla_hw_data *ha = vha->hw;
3138         struct qla_tgt_cmd *cmd = sctio->cmd;
3139         struct se_cmd *se_cmd = &cmd->se_cmd;
3140         unsigned long flags;
3141         int xmit_type = 0, resp = 0;
3142         uint32_t offset;
3143         uint16_t srr_ui;
3144
3145         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3146         srr_ui = ntfy->u.isp24.srr_ui;
3147
3148         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3149             cmd, srr_ui);
3150
3151         switch (srr_ui) {
3152         case SRR_IU_STATUS:
3153                 spin_lock_irqsave(&ha->hardware_lock, flags);
3154                 qlt_send_notify_ack(vha, ntfy,
3155                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3156                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3157                 xmit_type = QLA_TGT_XMIT_STATUS;
3158                 resp = 1;
3159                 break;
3160         case SRR_IU_DATA_IN:
3161                 if (!cmd->sg || !cmd->sg_cnt) {
3162                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3163                             "Unable to process SRR_IU_DATA_IN due to"
3164                             " missing cmd->sg, state: %d\n", cmd->state);
3165                         dump_stack();
3166                         goto out_reject;
3167                 }
3168                 if (se_cmd->scsi_status != 0) {
3169                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3170                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3171                             "scsi_status\n");
3172                         goto out_reject;
3173                 }
3174                 cmd->bufflen = se_cmd->data_length;
3175
3176                 if (qlt_has_data(cmd)) {
3177                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3178                                 goto out_reject;
3179                         spin_lock_irqsave(&ha->hardware_lock, flags);
3180                         qlt_send_notify_ack(vha, ntfy,
3181                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3182                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3183                         resp = 1;
3184                 } else {
3185                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3186                             "qla_target(%d): SRR for in data for cmd "
3187                             "without them (tag %d, SCSI status %d), "
3188                             "reject", vha->vp_idx, cmd->tag,
3189                             cmd->se_cmd.scsi_status);
3190                         goto out_reject;
3191                 }
3192                 break;
3193         case SRR_IU_DATA_OUT:
3194                 if (!cmd->sg || !cmd->sg_cnt) {
3195                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3196                             "Unable to process SRR_IU_DATA_OUT due to"
3197                             " missing cmd->sg\n");
3198                         dump_stack();
3199                         goto out_reject;
3200                 }
3201                 if (se_cmd->scsi_status != 0) {
3202                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3203                             "Rejecting SRR_IU_DATA_OUT"
3204                             " with non GOOD scsi_status\n");
3205                         goto out_reject;
3206                 }
3207                 cmd->bufflen = se_cmd->data_length;
3208
3209                 if (qlt_has_data(cmd)) {
3210                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3211                                 goto out_reject;
3212                         spin_lock_irqsave(&ha->hardware_lock, flags);
3213                         qlt_send_notify_ack(vha, ntfy,
3214                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3215                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3216                         if (xmit_type & QLA_TGT_XMIT_DATA)
3217                                 qlt_rdy_to_xfer(cmd);
3218                 } else {
3219                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3220                             "qla_target(%d): SRR for out data for cmd "
3221                             "without them (tag %d, SCSI status %d), "
3222                             "reject", vha->vp_idx, cmd->tag,
3223                             cmd->se_cmd.scsi_status);
3224                         goto out_reject;
3225                 }
3226                 break;
3227         default:
3228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3229                     "qla_target(%d): Unknown srr_ui value %x",
3230                     vha->vp_idx, srr_ui);
3231                 goto out_reject;
3232         }
3233
3234         /* Transmit response in case of status and data-in cases */
3235         if (resp)
3236                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3237
3238         return;
3239
3240 out_reject:
3241         spin_lock_irqsave(&ha->hardware_lock, flags);
3242         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3243             NOTIFY_ACK_SRR_FLAGS_REJECT,
3244             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3245             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3246         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3247                 cmd->state = QLA_TGT_STATE_DATA_IN;
3248                 dump_stack();
3249         } else
3250                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3251         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3252 }
3253
3254 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3255         struct qla_tgt_srr_imm *imm, int ha_locked)
3256 {
3257         struct qla_hw_data *ha = vha->hw;
3258         unsigned long flags = 0;
3259
3260         if (!ha_locked)
3261                 spin_lock_irqsave(&ha->hardware_lock, flags);
3262
3263         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3264             NOTIFY_ACK_SRR_FLAGS_REJECT,
3265             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3266             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3267
3268         if (!ha_locked)
3269                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3270
3271         kfree(imm);
3272 }
3273
3274 static void qlt_handle_srr_work(struct work_struct *work)
3275 {
3276         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3277         struct scsi_qla_host *vha = tgt->vha;
3278         struct qla_tgt_srr_ctio *sctio;
3279         unsigned long flags;
3280
3281         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3282             tgt);
3283
3284 restart:
3285         spin_lock_irqsave(&tgt->srr_lock, flags);
3286         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3287                 struct qla_tgt_srr_imm *imm, *i, *ti;
3288                 struct qla_tgt_cmd *cmd;
3289                 struct se_cmd *se_cmd;
3290
3291                 imm = NULL;
3292                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3293                                                 srr_list_entry) {
3294                         if (i->srr_id == sctio->srr_id) {
3295                                 list_del(&i->srr_list_entry);
3296                                 if (imm) {
3297                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3298                                           "qla_target(%d): There must be "
3299                                           "only one IMM SRR per CTIO SRR "
3300                                           "(IMM SRR %p, id %d, CTIO %p\n",
3301                                           vha->vp_idx, i, i->srr_id, sctio);
3302                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3303                                 } else
3304                                         imm = i;
3305                         }
3306                 }
3307
3308                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3309                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3310                     sctio->srr_id);
3311
3312                 if (imm == NULL) {
3313                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3314                             "Not found matching IMM for SRR CTIO (id %d)\n",
3315                             sctio->srr_id);
3316                         continue;
3317                 } else
3318                         list_del(&sctio->srr_list_entry);
3319
3320                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3321
3322                 cmd = sctio->cmd;
3323                 /*
3324                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3325                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3326                  * logic..
3327                  */
3328                 cmd->offset = 0;
3329                 if (cmd->free_sg) {
3330                         kfree(cmd->sg);
3331                         cmd->sg = NULL;
3332                         cmd->free_sg = 0;
3333                 }
3334                 se_cmd = &cmd->se_cmd;
3335
3336                 cmd->sg_cnt = se_cmd->t_data_nents;
3337                 cmd->sg = se_cmd->t_data_sg;
3338
3339                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3340                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3341                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3342                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3343
3344                 qlt_handle_srr(vha, sctio, imm);
3345
3346                 kfree(imm);
3347                 kfree(sctio);
3348                 goto restart;
3349         }
3350         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3351 }
3352
3353 /* ha->hardware_lock supposed to be held on entry */
3354 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3355         struct imm_ntfy_from_isp *iocb)
3356 {
3357         struct qla_tgt_srr_imm *imm;
3358         struct qla_hw_data *ha = vha->hw;
3359         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3360         struct qla_tgt_srr_ctio *sctio;
3361
3362         tgt->imm_srr_id++;
3363
3364         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3365             vha->vp_idx);
3366
3367         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3368         if (imm != NULL) {
3369                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3370
3371                 /* IRQ is already OFF */
3372                 spin_lock(&tgt->srr_lock);
3373                 imm->srr_id = tgt->imm_srr_id;
3374                 list_add_tail(&imm->srr_list_entry,
3375                     &tgt->srr_imm_list);
3376                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3377                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3378                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3379                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3380                         int found = 0;
3381                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3382                             srr_list_entry) {
3383                                 if (sctio->srr_id == imm->srr_id) {
3384                                         found = 1;
3385                                         break;
3386                                 }
3387                         }
3388                         if (found) {
3389                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3390                                     "Scheduling srr work\n");
3391                                 schedule_work(&tgt->srr_work);
3392                         } else {
3393                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3394                                     "qla_target(%d): imm_srr_id "
3395                                     "== ctio_srr_id (%d), but there is no "
3396                                     "corresponding SRR CTIO, deleting IMM "
3397                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3398                                     imm);
3399                                 list_del(&imm->srr_list_entry);
3400
3401                                 kfree(imm);
3402
3403                                 spin_unlock(&tgt->srr_lock);
3404                                 goto out_reject;
3405                         }
3406                 }
3407                 spin_unlock(&tgt->srr_lock);
3408         } else {
3409                 struct qla_tgt_srr_ctio *ts;
3410
3411                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3412                     "qla_target(%d): Unable to allocate SRR IMM "
3413                     "entry, SRR request will be rejected\n", vha->vp_idx);
3414
3415                 /* IRQ is already OFF */
3416                 spin_lock(&tgt->srr_lock);
3417                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3418                     srr_list_entry) {
3419                         if (sctio->srr_id == tgt->imm_srr_id) {
3420                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3421                                     "CTIO SRR %p deleted (id %d)\n",
3422                                     sctio, sctio->srr_id);
3423                                 list_del(&sctio->srr_list_entry);
3424                                 qlt_send_term_exchange(vha, sctio->cmd,
3425                                     &sctio->cmd->atio, 1);
3426                                 kfree(sctio);
3427                         }
3428                 }
3429                 spin_unlock(&tgt->srr_lock);
3430                 goto out_reject;
3431         }
3432
3433         return;
3434
3435 out_reject:
3436         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3437             NOTIFY_ACK_SRR_FLAGS_REJECT,
3438             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3439             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3440 }
3441
3442 /*
3443  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3444  */
3445 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3446         struct imm_ntfy_from_isp *iocb)
3447 {
3448         struct qla_hw_data *ha = vha->hw;
3449         uint32_t add_flags = 0;
3450         int send_notify_ack = 1;
3451         uint16_t status;
3452
3453         status = le16_to_cpu(iocb->u.isp2x.status);
3454         switch (status) {
3455         case IMM_NTFY_LIP_RESET:
3456         {
3457                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3458                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3459                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3460                     iocb->u.isp24.status_subcode);
3461
3462                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3463                         send_notify_ack = 0;
3464                 break;
3465         }
3466
3467         case IMM_NTFY_LIP_LINK_REINIT:
3468         {
3469                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3470                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3471                     "qla_target(%d): LINK REINIT (loop %#x, "
3472                     "subcode %x)\n", vha->vp_idx,
3473                     le16_to_cpu(iocb->u.isp24.nport_handle),
3474                     iocb->u.isp24.status_subcode);
3475                 if (tgt->link_reinit_iocb_pending) {
3476                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3477                             0, 0, 0, 0, 0, 0);
3478                 }
3479                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3480                 tgt->link_reinit_iocb_pending = 1;
3481                 /*
3482                  * QLogic requires to wait after LINK REINIT for possible
3483                  * PDISC or ADISC ELS commands
3484                  */
3485                 send_notify_ack = 0;
3486                 break;
3487         }
3488
3489         case IMM_NTFY_PORT_LOGOUT:
3490                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3491                     "qla_target(%d): Port logout (loop "
3492                     "%#x, subcode %x)\n", vha->vp_idx,
3493                     le16_to_cpu(iocb->u.isp24.nport_handle),
3494                     iocb->u.isp24.status_subcode);
3495
3496                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3497                         send_notify_ack = 0;
3498                 /* The sessions will be cleared in the callback, if needed */
3499                 break;
3500
3501         case IMM_NTFY_GLBL_TPRLO:
3502                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3503                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3504                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3505                         send_notify_ack = 0;
3506                 /* The sessions will be cleared in the callback, if needed */
3507                 break;
3508
3509         case IMM_NTFY_PORT_CONFIG:
3510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3511                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3512                     status);
3513                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3514                         send_notify_ack = 0;
3515                 /* The sessions will be cleared in the callback, if needed */
3516                 break;
3517
3518         case IMM_NTFY_GLBL_LOGO:
3519                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3520                     "qla_target(%d): Link failure detected\n",
3521                     vha->vp_idx);
3522                 /* I_T nexus loss */
3523                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3524                         send_notify_ack = 0;
3525                 break;
3526
3527         case IMM_NTFY_IOCB_OVERFLOW:
3528                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3529                     "qla_target(%d): Cannot provide requested "
3530                     "capability (IOCB overflowed the immediate notify "
3531                     "resource count)\n", vha->vp_idx);
3532                 break;
3533
3534         case IMM_NTFY_ABORT_TASK:
3535                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3536                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3537                     "L %#x)\n", vha->vp_idx,
3538                     le16_to_cpu(iocb->u.isp2x.seq_id),
3539                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3540                     le16_to_cpu(iocb->u.isp2x.lun));
3541                 if (qlt_abort_task(vha, iocb) == 0)
3542                         send_notify_ack = 0;
3543                 break;
3544
3545         case IMM_NTFY_RESOURCE:
3546                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3547                     "qla_target(%d): Out of resources, host %ld\n",
3548                     vha->vp_idx, vha->host_no);
3549                 break;
3550
3551         case IMM_NTFY_MSG_RX:
3552                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3553                     "qla_target(%d): Immediate notify task %x\n",
3554                     vha->vp_idx, iocb->u.isp2x.task_flags);
3555                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3556                         send_notify_ack = 0;
3557                 break;
3558
3559         case IMM_NTFY_ELS:
3560                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3561                         send_notify_ack = 0;
3562                 break;
3563
3564         case IMM_NTFY_SRR:
3565                 qlt_prepare_srr_imm(vha, iocb);
3566                 send_notify_ack = 0;
3567                 break;
3568
3569         default:
3570                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3571                     "qla_target(%d): Received unknown immediate "
3572                     "notify status %x\n", vha->vp_idx, status);
3573                 break;
3574         }
3575
3576         if (send_notify_ack)
3577                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3578 }
3579
3580 /*
3581  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3582  * This function sends busy to ISP 2xxx or 24xx.
3583  */
3584 static void qlt_send_busy(struct scsi_qla_host *vha,
3585         struct atio_from_isp *atio, uint16_t status)
3586 {
3587         struct ctio7_to_24xx *ctio24;
3588         struct qla_hw_data *ha = vha->hw;
3589         request_t *pkt;
3590         struct qla_tgt_sess *sess = NULL;
3591
3592         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3593             atio->u.isp24.fcp_hdr.s_id);
3594         if (!sess) {
3595                 qlt_send_term_exchange(vha, NULL, atio, 1);
3596                 return;
3597         }
3598         /* Sending marker isn't necessary, since we called from ISR */
3599
3600         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3601         if (!pkt) {
3602                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3603                     "qla_target(%d): %s failed: unable to allocate "
3604                     "request packet", vha->vp_idx, __func__);
3605                 return;
3606         }
3607
3608         pkt->entry_count = 1;
3609         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3610
3611         ctio24 = (struct ctio7_to_24xx *)pkt;
3612         ctio24->entry_type = CTIO_TYPE7;
3613         ctio24->nport_handle = sess->loop_id;
3614         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3615         ctio24->vp_index = vha->vp_idx;
3616         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3617         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3618         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3619         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3620         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3621             __constant_cpu_to_le16(
3622                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3623                 CTIO7_FLAGS_DONT_RET_CTIO);
3624         /*
3625          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3626          * if the explicit conformation is used.
3627          */
3628         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3629         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3630         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3631             &atio->u.isp24.fcp_cmnd.add_cdb[
3632             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3633         if (ctio24->u.status1.residual != 0)
3634                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3635
3636         qla2x00_start_iocbs(vha, vha->req);
3637 }
3638
3639 /* ha->hardware_lock supposed to be held on entry */
3640 /* called via callback from qla2xxx */
3641 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3642         struct atio_from_isp *atio)
3643 {
3644         struct qla_hw_data *ha = vha->hw;
3645         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3646         int rc;
3647
3648         if (unlikely(tgt == NULL)) {
3649                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3650                     "ATIO pkt, but no tgt (ha %p)", ha);
3651                 return;
3652         }
3653         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3654             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3655             vha->vp_idx, atio, atio->u.raw.entry_type,
3656             atio->u.raw.entry_count);
3657         /*
3658          * In tgt_stop mode we also should allow all requests to pass.
3659          * Otherwise, some commands can stuck.
3660          */
3661
3662         tgt->irq_cmd_count++;
3663
3664         switch (atio->u.raw.entry_type) {
3665         case ATIO_TYPE7:
3666                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3667                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3668                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3669                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3670                     atio->u.isp24.fcp_cmnd.rddata,
3671                     atio->u.isp24.fcp_cmnd.wrdata,
3672                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3673                     be32_to_cpu(get_unaligned((uint32_t *)
3674                         &atio->u.isp24.fcp_cmnd.add_cdb[
3675                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3676                     atio->u.isp24.fcp_hdr.s_id[0],
3677                     atio->u.isp24.fcp_hdr.s_id[1],
3678                     atio->u.isp24.fcp_hdr.s_id[2]);
3679
3680                 if (unlikely(atio->u.isp24.exchange_addr ==
3681                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3682                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3683                             "qla_target(%d): ATIO_TYPE7 "
3684                             "received with UNKNOWN exchange address, "
3685                             "sending QUEUE_FULL\n", vha->vp_idx);
3686                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3687                         break;
3688                 }
3689                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3690                         rc = qlt_handle_cmd_for_atio(vha, atio);
3691                 else
3692                         rc = qlt_handle_task_mgmt(vha, atio);
3693                 if (unlikely(rc != 0)) {
3694                         if (rc == -ESRCH) {
3695 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3696                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3697 #else
3698                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3699 #endif
3700                         } else {
3701                                 if (tgt->tgt_stop) {
3702                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3703                                             "qla_target: Unable to send "
3704                                             "command to target for req, "
3705                                             "ignoring.\n");
3706                                 } else {
3707                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3708                                             "qla_target(%d): Unable to send "
3709                                             "command to target, sending BUSY "
3710                                             "status.\n", vha->vp_idx);
3711                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3712                                 }
3713                         }
3714                 }
3715                 break;
3716
3717         case IMMED_NOTIFY_TYPE:
3718         {
3719                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3720                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3721                             "qla_target(%d): Received ATIO packet %x "
3722                             "with error status %x\n", vha->vp_idx,
3723                             atio->u.raw.entry_type,
3724                             atio->u.isp2x.entry_status);
3725                         break;
3726                 }
3727                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3728                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3729                 break;
3730         }
3731
3732         default:
3733                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3734                     "qla_target(%d): Received unknown ATIO atio "
3735                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3736                 break;
3737         }
3738
3739         tgt->irq_cmd_count--;
3740 }
3741
3742 /* ha->hardware_lock supposed to be held on entry */
3743 /* called via callback from qla2xxx */
3744 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3745 {
3746         struct qla_hw_data *ha = vha->hw;
3747         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3748
3749         if (unlikely(tgt == NULL)) {
3750                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3751                     "qla_target(%d): Response pkt %x received, but no "
3752                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3753                 return;
3754         }
3755
3756         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3757             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3758             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3759             pkt->entry_count, pkt->entry_status, pkt->handle);
3760
3761         /*
3762          * In tgt_stop mode we also should allow all requests to pass.
3763          * Otherwise, some commands can stuck.
3764          */
3765
3766         tgt->irq_cmd_count++;
3767
3768         switch (pkt->entry_type) {
3769         case CTIO_TYPE7:
3770         {
3771                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3772                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3773                     vha->vp_idx);
3774                 qlt_do_ctio_completion(vha, entry->handle,
3775                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3776                     entry);
3777                 break;
3778         }
3779
3780         case ACCEPT_TGT_IO_TYPE:
3781         {
3782                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3783                 int rc;
3784                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3785                     "ACCEPT_TGT_IO instance %d status %04x "
3786                     "lun %04x read/write %d data_length %04x "
3787                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3788                     le16_to_cpu(atio->u.isp2x.status),
3789                     le16_to_cpu(atio->u.isp2x.lun),
3790                     atio->u.isp2x.execution_codes,
3791                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3792                     atio), atio->u.isp2x.rx_id);
3793                 if (atio->u.isp2x.status !=
3794                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3795                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3796                             "qla_target(%d): ATIO with error "
3797                             "status %x received\n", vha->vp_idx,
3798                             le16_to_cpu(atio->u.isp2x.status));
3799                         break;
3800                 }
3801                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3802                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3803                     atio->u.isp2x.cdb[0], (unsigned long
3804                     int)sizeof(atio->u.isp2x.cdb));
3805
3806                 rc = qlt_handle_cmd_for_atio(vha, atio);
3807                 if (unlikely(rc != 0)) {
3808                         if (rc == -ESRCH) {
3809 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3810                                 qlt_send_busy(vha, atio, 0);
3811 #else
3812                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3813 #endif
3814                         } else {
3815                                 if (tgt->tgt_stop) {
3816                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3817                                             "qla_target: Unable to send "
3818                                             "command to target, sending TERM "
3819                                             "EXCHANGE for rsp\n");
3820                                         qlt_send_term_exchange(vha, NULL,
3821                                             atio, 1);
3822                                 } else {
3823                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3824                                             "qla_target(%d): Unable to send "
3825                                             "command to target, sending BUSY "
3826                                             "status\n", vha->vp_idx);
3827                                         qlt_send_busy(vha, atio, 0);
3828                                 }
3829                         }
3830                 }
3831         }
3832         break;
3833
3834         case CONTINUE_TGT_IO_TYPE:
3835         {
3836                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3837                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3838                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3839                 qlt_do_ctio_completion(vha, entry->handle,
3840                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3841                     entry);
3842                 break;
3843         }
3844
3845         case CTIO_A64_TYPE:
3846         {
3847                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3848                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3849                     vha->vp_idx);
3850                 qlt_do_ctio_completion(vha, entry->handle,
3851                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3852                     entry);
3853                 break;
3854         }
3855
3856         case IMMED_NOTIFY_TYPE:
3857                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3858                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3859                 break;
3860
3861         case NOTIFY_ACK_TYPE:
3862                 if (tgt->notify_ack_expected > 0) {
3863                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3864                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3865                             "NOTIFY_ACK seq %08x status %x\n",
3866                             le16_to_cpu(entry->u.isp2x.seq_id),
3867                             le16_to_cpu(entry->u.isp2x.status));
3868                         tgt->notify_ack_expected--;
3869                         if (entry->u.isp2x.status !=
3870                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3871                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3872                                     "qla_target(%d): NOTIFY_ACK "
3873                                     "failed %x\n", vha->vp_idx,
3874                                     le16_to_cpu(entry->u.isp2x.status));
3875                         }
3876                 } else {
3877                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3878                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3879                             vha->vp_idx);
3880                 }
3881                 break;
3882
3883         case ABTS_RECV_24XX:
3884                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3885                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3886                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3887                 break;
3888
3889         case ABTS_RESP_24XX:
3890                 if (tgt->abts_resp_expected > 0) {
3891                         struct abts_resp_from_24xx_fw *entry =
3892                                 (struct abts_resp_from_24xx_fw *)pkt;
3893                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3894                             "ABTS_RESP_24XX: compl_status %x\n",
3895                             entry->compl_status);
3896                         tgt->abts_resp_expected--;
3897                         if (le16_to_cpu(entry->compl_status) !=
3898                             ABTS_RESP_COMPL_SUCCESS) {
3899                                 if ((entry->error_subcode1 == 0x1E) &&
3900                                     (entry->error_subcode2 == 0)) {
3901                                         /*
3902                                          * We've got a race here: aborted
3903                                          * exchange not terminated, i.e.
3904                                          * response for the aborted command was
3905                                          * sent between the abort request was
3906                                          * received and processed.
3907                                          * Unfortunately, the firmware has a
3908                                          * silly requirement that all aborted
3909                                          * exchanges must be explicitely
3910                                          * terminated, otherwise it refuses to
3911                                          * send responses for the abort
3912                                          * requests. So, we have to
3913                                          * (re)terminate the exchange and retry
3914                                          * the abort response.
3915                                          */
3916                                         qlt_24xx_retry_term_exchange(vha,
3917                                             entry);
3918                                 } else
3919                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3920                                             "qla_target(%d): ABTS_RESP_24XX "
3921                                             "failed %x (subcode %x:%x)",
3922                                             vha->vp_idx, entry->compl_status,
3923                                             entry->error_subcode1,
3924                                             entry->error_subcode2);
3925                         }
3926                 } else {
3927                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3928                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3929                             "received\n", vha->vp_idx);
3930                 }
3931                 break;
3932
3933         default:
3934                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3935                     "qla_target(%d): Received unknown response pkt "
3936                     "type %x\n", vha->vp_idx, pkt->entry_type);
3937                 break;
3938         }
3939
3940         tgt->irq_cmd_count--;
3941 }
3942
3943 /*
3944  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3945  */
3946 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3947         uint16_t *mailbox)
3948 {
3949         struct qla_hw_data *ha = vha->hw;
3950         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3951         int login_code;
3952
3953         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3954             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3955             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3956             ha->operating_mode, ha->current_topology);
3957
3958         if (!ha->tgt.tgt_ops)
3959                 return;
3960
3961         if (unlikely(tgt == NULL)) {
3962                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3963                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3964                 return;
3965         }
3966
3967         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3968             IS_QLA2100(ha))
3969                 return;
3970         /*
3971          * In tgt_stop mode we also should allow all requests to pass.
3972          * Otherwise, some commands can stuck.
3973          */
3974
3975         tgt->irq_cmd_count++;
3976
3977         switch (code) {
3978         case MBA_RESET:                 /* Reset */
3979         case MBA_SYSTEM_ERR:            /* System Error */
3980         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3981         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3982                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3983                     "qla_target(%d): System error async event %#x "
3984                     "occurred", vha->vp_idx, code);
3985                 break;
3986         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3987                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3988                 break;
3989
3990         case MBA_LOOP_UP:
3991         {
3992                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3993                     "qla_target(%d): Async LOOP_UP occurred "
3994                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3995                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3996                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3997                 if (tgt->link_reinit_iocb_pending) {
3998                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3999                             0, 0, 0, 0, 0, 0);
4000                         tgt->link_reinit_iocb_pending = 0;
4001                 }
4002                 break;
4003         }
4004
4005         case MBA_LIP_OCCURRED:
4006         case MBA_LOOP_DOWN:
4007         case MBA_LIP_RESET:
4008         case MBA_RSCN_UPDATE:
4009                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4010                     "qla_target(%d): Async event %#x occurred "
4011                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4012                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4013                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4014                 break;
4015
4016         case MBA_PORT_UPDATE:
4017                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4018                     "qla_target(%d): Port update async event %#x "
4019                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4020                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4021                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4022                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4023
4024                 login_code = le16_to_cpu(mailbox[2]);
4025                 if (login_code == 0x4)
4026                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4027                             "Async MB 2: Got PLOGI Complete\n");
4028                 else if (login_code == 0x7)
4029                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4030                             "Async MB 2: Port Logged Out\n");
4031                 break;
4032
4033         default:
4034                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4035                     "qla_target(%d): Async event %#x occurred: "
4036                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4037                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4038                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4039                 break;
4040         }
4041
4042         tgt->irq_cmd_count--;
4043 }
4044
4045 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4046         uint16_t loop_id)
4047 {
4048         fc_port_t *fcport;
4049         int rc;
4050
4051         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4052         if (!fcport) {
4053                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4054                     "qla_target(%d): Allocation of tmp FC port failed",
4055                     vha->vp_idx);
4056                 return NULL;
4057         }
4058
4059         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4060
4061         fcport->loop_id = loop_id;
4062
4063         rc = qla2x00_get_port_database(vha, fcport, 0);
4064         if (rc != QLA_SUCCESS) {
4065                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4066                     "qla_target(%d): Failed to retrieve fcport "
4067                     "information -- get_port_database() returned %x "
4068                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4069                 kfree(fcport);
4070                 return NULL;
4071         }
4072
4073         return fcport;
4074 }
4075
4076 /* Must be called under tgt_mutex */
4077 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4078         uint8_t *s_id)
4079 {
4080         struct qla_hw_data *ha = vha->hw;
4081         struct qla_tgt_sess *sess = NULL;
4082         fc_port_t *fcport = NULL;
4083         int rc, global_resets;
4084         uint16_t loop_id = 0;
4085
4086 retry:
4087         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4088
4089         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4090         if (rc != 0) {
4091                 if ((s_id[0] == 0xFF) &&
4092                     (s_id[1] == 0xFC)) {
4093                         /*
4094                          * This is Domain Controller, so it should be
4095                          * OK to drop SCSI commands from it.
4096                          */
4097                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4098                             "Unable to find initiator with S_ID %x:%x:%x",
4099                             s_id[0], s_id[1], s_id[2]);
4100                 } else
4101                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4102                             "qla_target(%d): Unable to find "
4103                             "initiator with S_ID %x:%x:%x",
4104                             vha->vp_idx, s_id[0], s_id[1],
4105                             s_id[2]);
4106                 return NULL;
4107         }
4108
4109         fcport = qlt_get_port_database(vha, loop_id);
4110         if (!fcport)
4111                 return NULL;
4112
4113         if (global_resets !=
4114             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4116                     "qla_target(%d): global reset during session discovery "
4117                     "(counter was %d, new %d), retrying", vha->vp_idx,
4118                     global_resets,
4119                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4120                 goto retry;
4121         }
4122
4123         sess = qlt_create_sess(vha, fcport, true);
4124
4125         kfree(fcport);
4126         return sess;
4127 }
4128
4129 static void qlt_abort_work(struct qla_tgt *tgt,
4130         struct qla_tgt_sess_work_param *prm)
4131 {
4132         struct scsi_qla_host *vha = tgt->vha;
4133         struct qla_hw_data *ha = vha->hw;
4134         struct qla_tgt_sess *sess = NULL;
4135         unsigned long flags;
4136         uint32_t be_s_id;
4137         uint8_t s_id[3];
4138         int rc;
4139
4140         spin_lock_irqsave(&ha->hardware_lock, flags);
4141
4142         if (tgt->tgt_stop)
4143                 goto out_term;
4144
4145         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4146         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4147         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4148
4149         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4150             (unsigned char *)&be_s_id);
4151         if (!sess) {
4152                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4153
4154                 mutex_lock(&ha->tgt.tgt_mutex);
4155                 sess = qlt_make_local_sess(vha, s_id);
4156                 /* sess has got an extra creation ref */
4157                 mutex_unlock(&ha->tgt.tgt_mutex);
4158
4159                 spin_lock_irqsave(&ha->hardware_lock, flags);
4160                 if (!sess)
4161                         goto out_term;
4162         } else {
4163                 kref_get(&sess->se_sess->sess_kref);
4164         }
4165
4166         if (tgt->tgt_stop)
4167                 goto out_term;
4168
4169         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4170         if (rc != 0)
4171                 goto out_term;
4172         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4173
4174         ha->tgt.tgt_ops->put_sess(sess);
4175         return;
4176
4177 out_term:
4178         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4179         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4180         if (sess)
4181                 ha->tgt.tgt_ops->put_sess(sess);
4182 }
4183
4184 static void qlt_tmr_work(struct qla_tgt *tgt,
4185         struct qla_tgt_sess_work_param *prm)
4186 {
4187         struct atio_from_isp *a = &prm->tm_iocb2;
4188         struct scsi_qla_host *vha = tgt->vha;
4189         struct qla_hw_data *ha = vha->hw;
4190         struct qla_tgt_sess *sess = NULL;
4191         unsigned long flags;
4192         uint8_t *s_id = NULL; /* to hide compiler warnings */
4193         int rc;
4194         uint32_t lun, unpacked_lun;
4195         int lun_size, fn;
4196         void *iocb;
4197
4198         spin_lock_irqsave(&ha->hardware_lock, flags);
4199
4200         if (tgt->tgt_stop)
4201                 goto out_term;
4202
4203         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4204         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4205         if (!sess) {
4206                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4207
4208                 mutex_lock(&ha->tgt.tgt_mutex);
4209                 sess = qlt_make_local_sess(vha, s_id);
4210                 /* sess has got an extra creation ref */
4211                 mutex_unlock(&ha->tgt.tgt_mutex);
4212
4213                 spin_lock_irqsave(&ha->hardware_lock, flags);
4214                 if (!sess)
4215                         goto out_term;
4216         } else {
4217                 kref_get(&sess->se_sess->sess_kref);
4218         }
4219
4220         iocb = a;
4221         lun = a->u.isp24.fcp_cmnd.lun;
4222         lun_size = sizeof(lun);
4223         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4224         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4225
4226         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4227         if (rc != 0)
4228                 goto out_term;
4229         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4230
4231         ha->tgt.tgt_ops->put_sess(sess);
4232         return;
4233
4234 out_term:
4235         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4236         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4237         if (sess)
4238                 ha->tgt.tgt_ops->put_sess(sess);
4239 }
4240
4241 static void qlt_sess_work_fn(struct work_struct *work)
4242 {
4243         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4244         struct scsi_qla_host *vha = tgt->vha;
4245         unsigned long flags;
4246
4247         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4248
4249         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4250         while (!list_empty(&tgt->sess_works_list)) {
4251                 struct qla_tgt_sess_work_param *prm = list_entry(
4252                     tgt->sess_works_list.next, typeof(*prm),
4253                     sess_works_list_entry);
4254
4255                 /*
4256                  * This work can be scheduled on several CPUs at time, so we
4257                  * must delete the entry to eliminate double processing
4258                  */
4259                 list_del(&prm->sess_works_list_entry);
4260
4261                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4262
4263                 switch (prm->type) {
4264                 case QLA_TGT_SESS_WORK_ABORT:
4265                         qlt_abort_work(tgt, prm);
4266                         break;
4267                 case QLA_TGT_SESS_WORK_TM:
4268                         qlt_tmr_work(tgt, prm);
4269                         break;
4270                 default:
4271                         BUG_ON(1);
4272                         break;
4273                 }
4274
4275                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4276
4277                 kfree(prm);
4278         }
4279         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4280 }
4281
4282 /* Must be called under tgt_host_action_mutex */
4283 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4284 {
4285         struct qla_tgt *tgt;
4286
4287         if (!QLA_TGT_MODE_ENABLED())
4288                 return 0;
4289
4290         if (!IS_TGT_MODE_CAPABLE(ha)) {
4291                 ql_log(ql_log_warn, base_vha, 0xe070,
4292                     "This adapter does not support target mode.\n");
4293                 return 0;
4294         }
4295
4296         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4297             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4298
4299         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4300
4301         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4302         if (!tgt) {
4303                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4304                     "Unable to allocate struct qla_tgt\n");
4305                 return -ENOMEM;
4306         }
4307
4308         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4309                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4310
4311         tgt->ha = ha;
4312         tgt->vha = base_vha;
4313         init_waitqueue_head(&tgt->waitQ);
4314         INIT_LIST_HEAD(&tgt->sess_list);
4315         INIT_LIST_HEAD(&tgt->del_sess_list);
4316         INIT_DELAYED_WORK(&tgt->sess_del_work,
4317                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4318         spin_lock_init(&tgt->sess_work_lock);
4319         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4320         INIT_LIST_HEAD(&tgt->sess_works_list);
4321         spin_lock_init(&tgt->srr_lock);
4322         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4323         INIT_LIST_HEAD(&tgt->srr_imm_list);
4324         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4325         atomic_set(&tgt->tgt_global_resets_count, 0);
4326
4327         ha->tgt.qla_tgt = tgt;
4328
4329         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4330                 "qla_target(%d): using 64 Bit PCI addressing",
4331                 base_vha->vp_idx);
4332         tgt->tgt_enable_64bit_addr = 1;
4333         /* 3 is reserved */
4334         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4335         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4336         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4337
4338         mutex_lock(&qla_tgt_mutex);
4339         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4340         mutex_unlock(&qla_tgt_mutex);
4341
4342         return 0;
4343 }
4344
4345 /* Must be called under tgt_host_action_mutex */
4346 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4347 {
4348         if (!ha->tgt.qla_tgt)
4349                 return 0;
4350
4351         mutex_lock(&qla_tgt_mutex);
4352         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4353         mutex_unlock(&qla_tgt_mutex);
4354
4355         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4356             vha->host_no, ha);
4357         qlt_release(ha->tgt.qla_tgt);
4358
4359         return 0;
4360 }
4361
4362 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4363         unsigned char *b)
4364 {
4365         int i;
4366
4367         pr_debug("qla2xxx HW vha->node_name: ");
4368         for (i = 0; i < WWN_SIZE; i++)
4369                 pr_debug("%02x ", vha->node_name[i]);
4370         pr_debug("\n");
4371         pr_debug("qla2xxx HW vha->port_name: ");
4372         for (i = 0; i < WWN_SIZE; i++)
4373                 pr_debug("%02x ", vha->port_name[i]);
4374         pr_debug("\n");
4375
4376         pr_debug("qla2xxx passed configfs WWPN: ");
4377         put_unaligned_be64(wwpn, b);
4378         for (i = 0; i < WWN_SIZE; i++)
4379                 pr_debug("%02x ", b[i]);
4380         pr_debug("\n");
4381 }
4382
4383 /**
4384  * qla_tgt_lport_register - register lport with external module
4385  *
4386  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4387  * @wwpn: Passwd FC target WWPN
4388  * @callback:  lport initialization callback for tcm_qla2xxx code
4389  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4390  */
4391 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4392         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4393 {
4394         struct qla_tgt *tgt;
4395         struct scsi_qla_host *vha;
4396         struct qla_hw_data *ha;
4397         struct Scsi_Host *host;
4398         unsigned long flags;
4399         int rc;
4400         u8 b[WWN_SIZE];
4401
4402         mutex_lock(&qla_tgt_mutex);
4403         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4404                 vha = tgt->vha;
4405                 ha = vha->hw;
4406
4407                 host = vha->host;
4408                 if (!host)
4409                         continue;
4410
4411                 if (ha->tgt.tgt_ops != NULL)
4412                         continue;
4413
4414                 if (!(host->hostt->supported_mode & MODE_TARGET))
4415                         continue;
4416
4417                 spin_lock_irqsave(&ha->hardware_lock, flags);
4418                 if (host->active_mode & MODE_TARGET) {
4419                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4420                             host->host_no);
4421                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4422                         continue;
4423                 }
4424                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4425
4426                 if (!scsi_host_get(host)) {
4427                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4428                             "Unable to scsi_host_get() for"
4429                             " qla2xxx scsi_host\n");
4430                         continue;
4431                 }
4432                 qlt_lport_dump(vha, wwpn, b);
4433
4434                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4435                         scsi_host_put(host);
4436                         continue;
4437                 }
4438                 /*
4439                  * Setup passed parameters ahead of invoking callback
4440                  */
4441                 ha->tgt.tgt_ops = qla_tgt_ops;
4442                 ha->tgt.target_lport_ptr = target_lport_ptr;
4443                 rc = (*callback)(vha);
4444                 if (rc != 0) {
4445                         ha->tgt.tgt_ops = NULL;
4446                         ha->tgt.target_lport_ptr = NULL;
4447                 }
4448                 mutex_unlock(&qla_tgt_mutex);
4449                 return rc;
4450         }
4451         mutex_unlock(&qla_tgt_mutex);
4452
4453         return -ENODEV;
4454 }
4455 EXPORT_SYMBOL(qlt_lport_register);
4456
4457 /**
4458  * qla_tgt_lport_deregister - Degister lport
4459  *
4460  * @vha:  Registered scsi_qla_host pointer
4461  */
4462 void qlt_lport_deregister(struct scsi_qla_host *vha)
4463 {
4464         struct qla_hw_data *ha = vha->hw;
4465         struct Scsi_Host *sh = vha->host;
4466         /*
4467          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4468          */
4469         ha->tgt.target_lport_ptr = NULL;
4470         ha->tgt.tgt_ops = NULL;
4471         /*
4472          * Release the Scsi_Host reference for the underlying qla2xxx host
4473          */
4474         scsi_host_put(sh);
4475 }
4476 EXPORT_SYMBOL(qlt_lport_deregister);
4477
4478 /* Must be called under HW lock */
4479 void qlt_set_mode(struct scsi_qla_host *vha)
4480 {
4481         struct qla_hw_data *ha = vha->hw;
4482
4483         switch (ql2x_ini_mode) {
4484         case QLA2XXX_INI_MODE_DISABLED:
4485         case QLA2XXX_INI_MODE_EXCLUSIVE:
4486                 vha->host->active_mode = MODE_TARGET;
4487                 break;
4488         case QLA2XXX_INI_MODE_ENABLED:
4489                 vha->host->active_mode |= MODE_TARGET;
4490                 break;
4491         default:
4492                 break;
4493         }
4494
4495         if (ha->tgt.ini_mode_force_reverse)
4496                 qla_reverse_ini_mode(vha);
4497 }
4498
4499 /* Must be called under HW lock */
4500 void qlt_clear_mode(struct scsi_qla_host *vha)
4501 {
4502         struct qla_hw_data *ha = vha->hw;
4503
4504         switch (ql2x_ini_mode) {
4505         case QLA2XXX_INI_MODE_DISABLED:
4506                 vha->host->active_mode = MODE_UNKNOWN;
4507                 break;
4508         case QLA2XXX_INI_MODE_EXCLUSIVE:
4509                 vha->host->active_mode = MODE_INITIATOR;
4510                 break;
4511         case QLA2XXX_INI_MODE_ENABLED:
4512                 vha->host->active_mode &= ~MODE_TARGET;
4513                 break;
4514         default:
4515                 break;
4516         }
4517
4518         if (ha->tgt.ini_mode_force_reverse)
4519                 qla_reverse_ini_mode(vha);
4520 }
4521
4522 /*
4523  * qla_tgt_enable_vha - NO LOCK HELD
4524  *
4525  * host_reset, bring up w/ Target Mode Enabled
4526  */
4527 void
4528 qlt_enable_vha(struct scsi_qla_host *vha)
4529 {
4530         struct qla_hw_data *ha = vha->hw;
4531         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4532         unsigned long flags;
4533
4534         if (!tgt) {
4535                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4536                     "Unable to locate qla_tgt pointer from"
4537                     " struct qla_hw_data\n");
4538                 dump_stack();
4539                 return;
4540         }
4541
4542         spin_lock_irqsave(&ha->hardware_lock, flags);
4543         tgt->tgt_stopped = 0;
4544         qlt_set_mode(vha);
4545         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4546
4547         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4548         qla2xxx_wake_dpc(vha);
4549         qla2x00_wait_for_hba_online(vha);
4550 }
4551 EXPORT_SYMBOL(qlt_enable_vha);
4552
4553 /*
4554  * qla_tgt_disable_vha - NO LOCK HELD
4555  *
4556  * Disable Target Mode and reset the adapter
4557  */
4558 void
4559 qlt_disable_vha(struct scsi_qla_host *vha)
4560 {
4561         struct qla_hw_data *ha = vha->hw;
4562         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4563         unsigned long flags;
4564
4565         if (!tgt) {
4566                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4567                     "Unable to locate qla_tgt pointer from"
4568                     " struct qla_hw_data\n");
4569                 dump_stack();
4570                 return;
4571         }
4572
4573         spin_lock_irqsave(&ha->hardware_lock, flags);
4574         qlt_clear_mode(vha);
4575         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4576
4577         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4578         qla2xxx_wake_dpc(vha);
4579         qla2x00_wait_for_hba_online(vha);
4580 }
4581
4582 /*
4583  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4584  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4585  * members.
4586  */
4587 void
4588 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4589 {
4590         if (!qla_tgt_mode_enabled(vha))
4591                 return;
4592
4593         mutex_init(&ha->tgt.tgt_mutex);
4594         mutex_init(&ha->tgt.tgt_host_action_mutex);
4595
4596         qlt_clear_mode(vha);
4597
4598         /*
4599          * NOTE: Currently the value is kept the same for <24xx and
4600          * >=24xx ISPs. If it is necessary to change it,
4601          * the check should be added for specific ISPs,
4602          * assigning the value appropriately.
4603          */
4604         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4605 }
4606
4607 void
4608 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4609 {
4610         /*
4611          * FC-4 Feature bit 0 indicates target functionality to the name server.
4612          */
4613         if (qla_tgt_mode_enabled(vha)) {
4614                 if (qla_ini_mode_enabled(vha))
4615                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4616                 else
4617                         ct_req->req.rff_id.fc4_feature = BIT_0;
4618         } else if (qla_ini_mode_enabled(vha)) {
4619                 ct_req->req.rff_id.fc4_feature = BIT_1;
4620         }
4621 }
4622
4623 /*
4624  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4625  * @ha: HA context
4626  *
4627  * Beginning of ATIO ring has initialization control block already built
4628  * by nvram config routine.
4629  *
4630  * Returns 0 on success.
4631  */
4632 void
4633 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4634 {
4635         struct qla_hw_data *ha = vha->hw;
4636         uint16_t cnt;
4637         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4638
4639         if (!qla_tgt_mode_enabled(vha))
4640                 return;
4641
4642         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4643                 pkt->u.raw.signature = ATIO_PROCESSED;
4644                 pkt++;
4645         }
4646
4647 }
4648
4649 /*
4650  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4651  * @ha: SCSI driver HA context
4652  */
4653 void
4654 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4655 {
4656         struct qla_hw_data *ha = vha->hw;
4657         struct atio_from_isp *pkt;
4658         int cnt, i;
4659
4660         if (!vha->flags.online)
4661                 return;
4662
4663         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4664                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4665                 cnt = pkt->u.raw.entry_count;
4666
4667                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4668
4669                 for (i = 0; i < cnt; i++) {
4670                         ha->tgt.atio_ring_index++;
4671                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4672                                 ha->tgt.atio_ring_index = 0;
4673                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4674                         } else
4675                                 ha->tgt.atio_ring_ptr++;
4676
4677                         pkt->u.raw.signature = ATIO_PROCESSED;
4678                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4679                 }
4680                 wmb();
4681         }
4682
4683         /* Adjust ring index */
4684         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4685 }
4686
4687 void
4688 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4689 {
4690         struct qla_hw_data *ha = vha->hw;
4691         if (!QLA_TGT_MODE_ENABLED())
4692                 return;
4693
4694         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4695         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4696         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4697
4698         if (IS_ATIO_MSIX_CAPABLE(ha)) {
4699                 struct qla_msix_entry *msix = &ha->msix_entries[2];
4700                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4701
4702                 icb->msix_atio = cpu_to_le16(msix->entry);
4703                 ql_dbg(ql_dbg_init, vha, 0xf072,
4704                     "Registering ICB vector 0x%x for atio que.\n",
4705                     msix->entry);
4706         }
4707 }
4708
4709 void
4710 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4711 {
4712         struct qla_hw_data *ha = vha->hw;
4713
4714         if (qla_tgt_mode_enabled(vha)) {
4715                 if (!ha->tgt.saved_set) {
4716                         /* We save only once */
4717                         ha->tgt.saved_exchange_count = nv->exchange_count;
4718                         ha->tgt.saved_firmware_options_1 =
4719                             nv->firmware_options_1;
4720                         ha->tgt.saved_firmware_options_2 =
4721                             nv->firmware_options_2;
4722                         ha->tgt.saved_firmware_options_3 =
4723                             nv->firmware_options_3;
4724                         ha->tgt.saved_set = 1;
4725                 }
4726
4727                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4728
4729                 /* Enable target mode */
4730                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4731
4732                 /* Disable ini mode, if requested */
4733                 if (!qla_ini_mode_enabled(vha))
4734                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4735
4736                 /* Disable Full Login after LIP */
4737                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4738                 /* Enable initial LIP */
4739                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4740                 /* Enable FC tapes support */
4741                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4742                 /* Disable Full Login after LIP */
4743                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4744                 /* Enable target PRLI control */
4745                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4746         } else {
4747                 if (ha->tgt.saved_set) {
4748                         nv->exchange_count = ha->tgt.saved_exchange_count;
4749                         nv->firmware_options_1 =
4750                             ha->tgt.saved_firmware_options_1;
4751                         nv->firmware_options_2 =
4752                             ha->tgt.saved_firmware_options_2;
4753                         nv->firmware_options_3 =
4754                             ha->tgt.saved_firmware_options_3;
4755                 }
4756                 return;
4757         }
4758
4759         /* out-of-order frames reassembly */
4760         nv->firmware_options_3 |= BIT_6|BIT_9;
4761
4762         if (ha->tgt.enable_class_2) {
4763                 if (vha->flags.init_done)
4764                         fc_host_supported_classes(vha->host) =
4765                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4766
4767                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4768         } else {
4769                 if (vha->flags.init_done)
4770                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4771
4772                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4773         }
4774 }
4775
4776 void
4777 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4778         struct init_cb_24xx *icb)
4779 {
4780         struct qla_hw_data *ha = vha->hw;
4781
4782         if (ha->tgt.node_name_set) {
4783                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4784                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4785         }
4786 }
4787
4788 void
4789 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4790 {
4791         struct qla_hw_data *ha = vha->hw;
4792
4793         if (!QLA_TGT_MODE_ENABLED())
4794                 return;
4795
4796         if (qla_tgt_mode_enabled(vha)) {
4797                 if (!ha->tgt.saved_set) {
4798                         /* We save only once */
4799                         ha->tgt.saved_exchange_count = nv->exchange_count;
4800                         ha->tgt.saved_firmware_options_1 =
4801                             nv->firmware_options_1;
4802                         ha->tgt.saved_firmware_options_2 =
4803                             nv->firmware_options_2;
4804                         ha->tgt.saved_firmware_options_3 =
4805                             nv->firmware_options_3;
4806                         ha->tgt.saved_set = 1;
4807                 }
4808
4809                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4810
4811                 /* Enable target mode */
4812                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4813
4814                 /* Disable ini mode, if requested */
4815                 if (!qla_ini_mode_enabled(vha))
4816                         nv->firmware_options_1 |=
4817                             __constant_cpu_to_le32(BIT_5);
4818
4819                 /* Disable Full Login after LIP */
4820                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4821                 /* Enable initial LIP */
4822                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4823                 /* Enable FC tapes support */
4824                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4825                 /* Disable Full Login after LIP */
4826                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4827                 /* Enable target PRLI control */
4828                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4829         } else {
4830                 if (ha->tgt.saved_set) {
4831                         nv->exchange_count = ha->tgt.saved_exchange_count;
4832                         nv->firmware_options_1 =
4833                             ha->tgt.saved_firmware_options_1;
4834                         nv->firmware_options_2 =
4835                             ha->tgt.saved_firmware_options_2;
4836                         nv->firmware_options_3 =
4837                             ha->tgt.saved_firmware_options_3;
4838                 }
4839                 return;
4840         }
4841
4842         /* out-of-order frames reassembly */
4843         nv->firmware_options_3 |= BIT_6|BIT_9;
4844
4845         if (ha->tgt.enable_class_2) {
4846                 if (vha->flags.init_done)
4847                         fc_host_supported_classes(vha->host) =
4848                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4849
4850                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4851         } else {
4852                 if (vha->flags.init_done)
4853                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4854
4855                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4856         }
4857 }
4858
4859 void
4860 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4861         struct init_cb_81xx *icb)
4862 {
4863         struct qla_hw_data *ha = vha->hw;
4864
4865         if (!QLA_TGT_MODE_ENABLED())
4866                 return;
4867
4868         if (ha->tgt.node_name_set) {
4869                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4870                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4871         }
4872 }
4873
4874 void
4875 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4876 {
4877         if (!QLA_TGT_MODE_ENABLED())
4878                 return;
4879
4880         ha->msix_count += 1; /* For ATIO Q */
4881 }
4882
4883 int
4884 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4885         struct sts_entry_24xx *pkt)
4886 {
4887         switch (pkt->entry_type) {
4888         case ABTS_RECV_24XX:
4889         case ABTS_RESP_24XX:
4890         case CTIO_TYPE7:
4891         case NOTIFY_ACK_TYPE:
4892                 return 1;
4893         default:
4894                 return 0;
4895         }
4896 }
4897
4898 void
4899 qlt_modify_vp_config(struct scsi_qla_host *vha,
4900         struct vp_config_entry_24xx *vpmod)
4901 {
4902         if (qla_tgt_mode_enabled(vha))
4903                 vpmod->options_idx1 &= ~BIT_5;
4904         /* Disable ini mode, if requested */
4905         if (!qla_ini_mode_enabled(vha))
4906                 vpmod->options_idx1 &= ~BIT_4;
4907 }
4908
4909 void
4910 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4911 {
4912         if (!QLA_TGT_MODE_ENABLED())
4913                 return;
4914
4915         if  (ha->mqenable || IS_QLA83XX(ha)) {
4916                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4917                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4918         } else {
4919                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4920                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4921         }
4922
4923         mutex_init(&ha->tgt.tgt_mutex);
4924         mutex_init(&ha->tgt.tgt_host_action_mutex);
4925         qlt_clear_mode(base_vha);
4926 }
4927
4928 irqreturn_t
4929 qla83xx_msix_atio_q(int irq, void *dev_id)
4930 {
4931         struct rsp_que *rsp;
4932         scsi_qla_host_t *vha;
4933         struct qla_hw_data *ha;
4934         unsigned long flags;
4935
4936         rsp = (struct rsp_que *) dev_id;
4937         ha = rsp->hw;
4938         vha = pci_get_drvdata(ha->pdev);
4939
4940         spin_lock_irqsave(&ha->hardware_lock, flags);
4941
4942         qlt_24xx_process_atio_queue(vha);
4943         qla24xx_process_response_queue(vha, rsp);
4944
4945         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4946
4947         return IRQ_HANDLED;
4948 }
4949
4950 int
4951 qlt_mem_alloc(struct qla_hw_data *ha)
4952 {
4953         if (!QLA_TGT_MODE_ENABLED())
4954                 return 0;
4955
4956         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4957             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4958         if (!ha->tgt.tgt_vp_map)
4959                 return -ENOMEM;
4960
4961         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4962             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4963             &ha->tgt.atio_dma, GFP_KERNEL);
4964         if (!ha->tgt.atio_ring) {
4965                 kfree(ha->tgt.tgt_vp_map);
4966                 return -ENOMEM;
4967         }
4968         return 0;
4969 }
4970
4971 void
4972 qlt_mem_free(struct qla_hw_data *ha)
4973 {
4974         if (!QLA_TGT_MODE_ENABLED())
4975                 return;
4976
4977         if (ha->tgt.atio_ring) {
4978                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4979                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4980                     ha->tgt.atio_dma);
4981         }
4982         kfree(ha->tgt.tgt_vp_map);
4983 }
4984
4985 /* vport_slock to be held by the caller */
4986 void
4987 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4988 {
4989         if (!QLA_TGT_MODE_ENABLED())
4990                 return;
4991
4992         switch (cmd) {
4993         case SET_VP_IDX:
4994                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4995                 break;
4996         case SET_AL_PA:
4997                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4998                 break;
4999         case RESET_VP_IDX:
5000                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5001                 break;
5002         case RESET_AL_PA:
5003                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5004                 break;
5005         }
5006 }
5007
5008 static int __init qlt_parse_ini_mode(void)
5009 {
5010         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5011                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5012         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5013                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5014         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5015                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5016         else
5017                 return false;
5018
5019         return true;
5020 }
5021
5022 int __init qlt_init(void)
5023 {
5024         int ret;
5025
5026         if (!qlt_parse_ini_mode()) {
5027                 ql_log(ql_log_fatal, NULL, 0xe06b,
5028                     "qlt_parse_ini_mode() failed\n");
5029                 return -EINVAL;
5030         }
5031
5032         if (!QLA_TGT_MODE_ENABLED())
5033                 return 0;
5034
5035         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
5036             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
5037             NULL);
5038         if (!qla_tgt_cmd_cachep) {
5039                 ql_log(ql_log_fatal, NULL, 0xe06c,
5040                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
5041                 return -ENOMEM;
5042         }
5043
5044         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5045             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5046             qla_tgt_mgmt_cmd), 0, NULL);
5047         if (!qla_tgt_mgmt_cmd_cachep) {
5048                 ql_log(ql_log_fatal, NULL, 0xe06d,
5049                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5050                 ret = -ENOMEM;
5051                 goto out;
5052         }
5053
5054         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5055             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5056         if (!qla_tgt_mgmt_cmd_mempool) {
5057                 ql_log(ql_log_fatal, NULL, 0xe06e,
5058                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5059                 ret = -ENOMEM;
5060                 goto out_mgmt_cmd_cachep;
5061         }
5062
5063         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5064         if (!qla_tgt_wq) {
5065                 ql_log(ql_log_fatal, NULL, 0xe06f,
5066                     "alloc_workqueue for qla_tgt_wq failed\n");
5067                 ret = -ENOMEM;
5068                 goto out_cmd_mempool;
5069         }
5070         /*
5071          * Return 1 to signal that initiator-mode is being disabled
5072          */
5073         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5074
5075 out_cmd_mempool:
5076         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5077 out_mgmt_cmd_cachep:
5078         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5079 out:
5080         kmem_cache_destroy(qla_tgt_cmd_cachep);
5081         return ret;
5082 }
5083
5084 void qlt_exit(void)
5085 {
5086         if (!QLA_TGT_MODE_ENABLED())
5087                 return;
5088
5089         destroy_workqueue(qla_tgt_wq);
5090         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5091         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5092         kmem_cache_destroy(qla_tgt_cmd_cachep);
5093 }