drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt, uint8_t);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *ntfy,
 119         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 120         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 121 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 122         struct imm_ntfy_from_isp *imm, int ha_locked);
 123 /*
 124  * Global Variables
 125  */
 126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 127 static struct kmem_cache *qla_tgt_plogi_cachep;
 128 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 129 static struct workqueue_struct *qla_tgt_wq;
 130 static DEFINE_MUTEX(qla_tgt_mutex);
 131 static LIST_HEAD(qla_tgt_glist);
 132
 133 /* This API intentionally takes dest as a parameter, rather than returning
 134  * int value to avoid caller forgetting to issue wmb() after the store */
 135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 136 {
 137         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 138         *dest = atomic_inc_return(&base_vha->generation_tick);
 139         /* memory barrier */
 140         wmb();
 141 }
 142
 143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 144 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 145         struct qla_tgt *tgt,
 146         const uint8_t *port_name)
 147 {
 148         struct qla_tgt_sess *sess;
 149
 150         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 151                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 152                         return sess;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 /* Might release hw lock, then reaquire!! */
 159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 160 {
 161         /* Send marker if required */
 162         if (unlikely(vha->marker_needed != 0)) {
 163                 int rc = qla2x00_issue_marker(vha, vha_locked);
 164                 if (rc != QLA_SUCCESS) {
 165                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 166                             "qla_target(%d): issue_marker() failed\n",
 167                             vha->vp_idx);
 168                 }
 169                 return rc;
 170         }
 171         return QLA_SUCCESS;
 172 }
 173
 174 static inline
 175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 176         uint8_t *d_id)
 177 {
 178         struct qla_hw_data *ha = vha->hw;
 179         uint8_t vp_idx;
 180
 181         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 182                 return NULL;
 183
 184         if (vha->d_id.b.al_pa == d_id[2])
 185                 return vha;
 186
 187         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 188         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 189         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 190                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 191
 192         return NULL;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 197         uint16_t vp_idx)
 198 {
 199         struct qla_hw_data *ha = vha->hw;
 200
 201         if (vha->vp_idx == vp_idx)
 202                 return vha;
 203
 204         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 205         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 206                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 207
 208         return NULL;
 209 }
 210
 211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 212 {
 213         unsigned long flags;
 214
 215         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 216
 217         vha->hw->tgt.num_pend_cmds++;
 218         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 219                 vha->qla_stats.stat_max_pend_cmds =
 220                         vha->hw->tgt.num_pend_cmds;
 221         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 222 }
 223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 224 {
 225         unsigned long flags;
 226
 227         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 228         vha->hw->tgt.num_pend_cmds--;
 229         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 230 }
 231
 232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 233         struct atio_from_isp *atio, uint8_t ha_locked)
 234 {
 235         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 236                 "%s: qla_target(%d): type %x ox_id %04x\n",
 237                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 238                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 239
 240         switch (atio->u.raw.entry_type) {
 241         case ATIO_TYPE7:
 242         {
 243                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 244                     atio->u.isp24.fcp_hdr.d_id);
 245                 if (unlikely(NULL == host)) {
 246                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 247                             "qla_target(%d): Received ATIO_TYPE7 "
 248                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 249                             atio->u.isp24.fcp_hdr.d_id[0],
 250                             atio->u.isp24.fcp_hdr.d_id[1],
 251                             atio->u.isp24.fcp_hdr.d_id[2]);
 252                         break;
 253                 }
 254                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 255                 break;
 256         }
 257
 258         case IMMED_NOTIFY_TYPE:
 259         {
 260                 struct scsi_qla_host *host = vha;
 261                 struct imm_ntfy_from_isp *entry =
 262                     (struct imm_ntfy_from_isp *)atio;
 263
 264                 if ((entry->u.isp24.vp_index != 0xFF) &&
 265                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 266                         host = qlt_find_host_by_vp_idx(vha,
 267                             entry->u.isp24.vp_index);
 268                         if (unlikely(!host)) {
 269                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 270                                     "qla_target(%d): Received "
 271                                     "ATIO (IMMED_NOTIFY_TYPE) "
 272                                     "with unknown vp_index %d\n",
 273                                     vha->vp_idx, entry->u.isp24.vp_index);
 274                                 break;
 275                         }
 276                 }
 277                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 278                 break;
 279         }
 280
 281         default:
 282                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 283                     "qla_target(%d): Received unknown ATIO atio "
 284                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 285                 break;
 286         }
 287
 288         return false;
 289 }
 290
 291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 292 {
 293         switch (pkt->entry_type) {
 294         case CTIO_CRC2:
 295                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 296                         "qla_target(%d):%s: CRC2 Response pkt\n",
 297                         vha->vp_idx, __func__);
 298         case CTIO_TYPE7:
 299         {
 300                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 301                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 302                     entry->vp_index);
 303                 if (unlikely(!host)) {
 304                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 305                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 306                             "received, with unknown vp_index %d\n",
 307                             vha->vp_idx, entry->vp_index);
 308                         break;
 309                 }
 310                 qlt_response_pkt(host, pkt);
 311                 break;
 312         }
 313
 314         case IMMED_NOTIFY_TYPE:
 315         {
 316                 struct scsi_qla_host *host = vha;
 317                 struct imm_ntfy_from_isp *entry =
 318                     (struct imm_ntfy_from_isp *)pkt;
 319
 320                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 321                 if (unlikely(!host)) {
 322                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 323                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 324                             "received, with unknown vp_index %d\n",
 325                             vha->vp_idx, entry->u.isp24.vp_index);
 326                         break;
 327                 }
 328                 qlt_response_pkt(host, pkt);
 329                 break;
 330         }
 331
 332         case NOTIFY_ACK_TYPE:
 333         {
 334                 struct scsi_qla_host *host = vha;
 335                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 336
 337                 if (0xFF != entry->u.isp24.vp_index) {
 338                         host = qlt_find_host_by_vp_idx(vha,
 339                             entry->u.isp24.vp_index);
 340                         if (unlikely(!host)) {
 341                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 342                                     "qla_target(%d): Response "
 343                                     "pkt (NOTIFY_ACK_TYPE) "
 344                                     "received, with unknown "
 345                                     "vp_index %d\n", vha->vp_idx,
 346                                     entry->u.isp24.vp_index);
 347                                 break;
 348                         }
 349                 }
 350                 qlt_response_pkt(host, pkt);
 351                 break;
 352         }
 353
 354         case ABTS_RECV_24XX:
 355         {
 356                 struct abts_recv_from_24xx *entry =
 357                     (struct abts_recv_from_24xx *)pkt;
 358                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 359                     entry->vp_index);
 360                 if (unlikely(!host)) {
 361                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 362                             "qla_target(%d): Response pkt "
 363                             "(ABTS_RECV_24XX) received, with unknown "
 364                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 365                         break;
 366                 }
 367                 qlt_response_pkt(host, pkt);
 368                 break;
 369         }
 370
 371         case ABTS_RESP_24XX:
 372         {
 373                 struct abts_resp_to_24xx *entry =
 374                     (struct abts_resp_to_24xx *)pkt;
 375                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 376                     entry->vp_index);
 377                 if (unlikely(!host)) {
 378                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 379                             "qla_target(%d): Response pkt "
 380                             "(ABTS_RECV_24XX) received, with unknown "
 381                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 382                         break;
 383                 }
 384                 qlt_response_pkt(host, pkt);
 385                 break;
 386         }
 387
 388         default:
 389                 qlt_response_pkt(vha, pkt);
 390                 break;
 391         }
 392
 393 }
 394
 395 /*
 396  * All qlt_plogi_ack_t operations are protected by hardware_lock
 397  */
 398
 399 /*
 400  * This is a zero-base ref-counting solution, since hardware_lock
 401  * guarantees that ref_count is not modified concurrently.
 402  * Upon successful return content of iocb is undefined
 403  */
 404 static qlt_plogi_ack_t *
 405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 406                        struct imm_ntfy_from_isp *iocb)
 407 {
 408         qlt_plogi_ack_t *pla;
 409
 410         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 411                 if (pla->id.b24 == id->b24) {
 412                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 413                         pla->iocb = *iocb;
 414                         return pla;
 415                 }
 416         }
 417
 418         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 419         if (!pla) {
 420                 ql_dbg(ql_dbg_async, vha, 0x5088,
 421                        "qla_target(%d): Allocation of plogi_ack failed\n",
 422                        vha->vp_idx);
 423                 return NULL;
 424         }
 425
 426         pla->iocb = *iocb;
 427         pla->id = *id;
 428         list_add_tail(&pla->list, &vha->plogi_ack_list);
 429
 430         return pla;
 431 }
 432
 433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
 434 {
 435         BUG_ON(!pla->ref_count);
 436         pla->ref_count--;
 437
 438         if (pla->ref_count)
 439                 return;
 440
 441         ql_dbg(ql_dbg_async, vha, 0x5089,
 442             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 443             " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
 444             pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
 445             pla->iocb.u.isp24.port_id[0],
 446             le16_to_cpu(pla->iocb.u.isp24.nport_handle),
 447             pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
 448         qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);
 449
 450         list_del(&pla->list);
 451         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 452 }
 453
 454 static void
 455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
 456     struct qla_tgt_sess *sess, qlt_plogi_link_t link)
 457 {
 458         /* Inc ref_count first because link might already be pointing at pla */
 459         pla->ref_count++;
 460
 461         if (sess->plogi_link[link])
 462                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 463
 464         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 465             "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 466             " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name,
 467             pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
 468             pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
 469             pla->ref_count);
 470
 471         sess->plogi_link[link] = pla;
 472 }
 473
 474 typedef struct {
 475         /* These fields must be initialized by the caller */
 476         port_id_t id;
 477         /*
 478          * number of cmds dropped while we were waiting for
 479          * initiator to ack LOGO initialize to 1 if LOGO is
 480          * triggered by a command, otherwise, to 0
 481          */
 482         int cmd_count;
 483
 484         /* These fields are used by callee */
 485         struct list_head list;
 486 } qlt_port_logo_t;
 487
 488 static void
 489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 490 {
 491         qlt_port_logo_t *tmp;
 492         int res;
 493
 494         mutex_lock(&vha->vha_tgt.tgt_mutex);
 495
 496         list_for_each_entry(tmp, &vha->logo_list, list) {
 497                 if (tmp->id.b24 == logo->id.b24) {
 498                         tmp->cmd_count += logo->cmd_count;
 499                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 500                         return;
 501                 }
 502         }
 503
 504         list_add_tail(&logo->list, &vha->logo_list);
 505
 506         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 507
 508         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 509
 510         mutex_lock(&vha->vha_tgt.tgt_mutex);
 511         list_del(&logo->list);
 512         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 513
 514         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 515             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 516             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 517             logo->cmd_count, res);
 518 }
 519
 520 static void qlt_free_session_done(struct work_struct *work)
 521 {
 522         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 523             free_work);
 524         struct qla_tgt *tgt = sess->tgt;
 525         struct scsi_qla_host *vha = sess->vha;
 526         struct qla_hw_data *ha = vha->hw;
 527         unsigned long flags;
 528         bool logout_started = false;
 529         fc_port_t fcport;
 530
 531         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 532                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 533                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 534                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 535                 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 536                 sess->logout_on_delete, sess->keep_nport_handle,
 537                 sess->send_els_logo);
 538
 539         BUG_ON(!tgt);
 540
 541         if (sess->send_els_logo) {
 542                 qlt_port_logo_t logo;
 543                 logo.id = sess->s_id;
 544                 logo.cmd_count = 0;
 545                 qlt_send_first_logo(vha, &logo);
 546         }
 547
 548         if (sess->logout_on_delete) {
 549                 int rc;
 550
 551                 memset(&fcport, 0, sizeof(fcport));
 552                 fcport.loop_id = sess->loop_id;
 553                 fcport.d_id = sess->s_id;
 554                 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
 555                 fcport.vha = vha;
 556                 fcport.tgt_session = sess;
 557
 558                 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
 559                 if (rc != QLA_SUCCESS)
 560                         ql_log(ql_log_warn, vha, 0xf085,
 561                                "Schedule logo failed sess %p rc %d\n",
 562                                sess, rc);
 563                 else
 564                         logout_started = true;
 565         }
 566
 567         /*
 568          * Release the target session for FC Nexus from fabric module code.
 569          */
 570         if (sess->se_sess != NULL)
 571                 ha->tgt.tgt_ops->free_session(sess);
 572
 573         if (logout_started) {
 574                 bool traced = false;
 575
 576                 while (!ACCESS_ONCE(sess->logout_completed)) {
 577                         if (!traced) {
 578                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 579                                         "%s: waiting for sess %p logout\n",
 580                                         __func__, sess);
 581                                 traced = true;
 582                         }
 583                         msleep(100);
 584                 }
 585
 586                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 587                         "%s: sess %p logout completed\n",
 588                         __func__, sess);
 589         }
 590
 591         spin_lock_irqsave(&ha->hardware_lock, flags);
 592
 593         {
 594                 qlt_plogi_ack_t *own =
 595                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 596                 qlt_plogi_ack_t *con =
 597                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
 598
 599                 if (con) {
 600                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
 601                             "se_sess %p / sess %p port %8phC is gone,"
 602                             " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
 603                             sess->se_sess, sess, sess->port_name,
 604                             own ? "releasing own PLOGI" :
 605                             "no own PLOGI pending",
 606                             own ? own->ref_count : -1,
 607                             con->iocb.u.isp24.port_name, con->ref_count);
 608                         qlt_plogi_ack_unref(vha, con);
 609                 } else {
 610                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
 611                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
 612                             sess->se_sess, sess, sess->port_name,
 613                             own ? "releasing own PLOGI" :
 614                             "no own PLOGI pending",
 615                             own ? own->ref_count : -1);
 616                 }
 617
 618                 if (own)
 619                         qlt_plogi_ack_unref(vha, own);
 620         }
 621
 622         list_del(&sess->sess_list_entry);
 623
 624         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 625
 626         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 627             "Unregistration of sess %p finished\n", sess);
 628
 629         kfree(sess);
 630         /*
 631          * We need to protect against race, when tgt is freed before or
 632          * inside wake_up()
 633          */
 634         tgt->sess_count--;
 635         if (tgt->sess_count == 0)
 636                 wake_up_all(&tgt->waitQ);
 637 }
 638
 639 /* ha->tgt.sess_lock supposed to be held on entry */
 640 static void qlt_release_session(struct kref *kref)
 641 {
 642         struct qla_tgt_sess *sess =
 643                 container_of(kref, struct qla_tgt_sess, sess_kref);
 644         struct scsi_qla_host *vha = sess->vha;
 645
 646         if (sess->se_sess)
 647                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 648
 649         if (!list_empty(&sess->del_list_entry))
 650                 list_del_init(&sess->del_list_entry);
 651         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 652
 653         INIT_WORK(&sess->free_work, qlt_free_session_done);
 654         schedule_work(&sess->free_work);
 655 }
 656
 657 void qlt_put_sess(struct qla_tgt_sess *sess)
 658 {
 659         if (!sess)
 660                 return;
 661
 662         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 663         kref_put(&sess->sess_kref, qlt_release_session);
 664 }
 665 EXPORT_SYMBOL(qlt_put_sess);
 666
 667 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 668 {
 669         struct qla_hw_data *ha = vha->hw;
 670         struct qla_tgt_sess *sess = NULL;
 671         uint32_t unpacked_lun, lun = 0;
 672         uint16_t loop_id;
 673         int res = 0;
 674         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 675         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 676         unsigned long flags;
 677
 678         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 679         if (loop_id == 0xFFFF) {
 680                 /* Global event */
 681                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 682                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 683                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 684                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 685 #if 0 /* FIXME: do we need to choose a session here? */
 686                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 687                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 688                             typeof(*sess), sess_list_entry);
 689                         switch (mcmd) {
 690                         case QLA_TGT_NEXUS_LOSS_SESS:
 691                                 mcmd = QLA_TGT_NEXUS_LOSS;
 692                                 break;
 693                         case QLA_TGT_ABORT_ALL_SESS:
 694                                 mcmd = QLA_TGT_ABORT_ALL;
 695                                 break;
 696                         case QLA_TGT_NEXUS_LOSS:
 697                         case QLA_TGT_ABORT_ALL:
 698                                 break;
 699                         default:
 700                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 701                                     "qla_target(%d): Not allowed "
 702                                     "command %x in %s", vha->vp_idx,
 703                                     mcmd, __func__);
 704                                 sess = NULL;
 705                                 break;
 706                         }
 707                 } else
 708                         sess = NULL;
 709 #endif
 710         } else {
 711                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 712                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 713                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 714         }
 715
 716         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 717             "Using sess for qla_tgt_reset: %p\n", sess);
 718         if (!sess) {
 719                 res = -ESRCH;
 720                 return res;
 721         }
 722
 723         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 724             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 725             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 726             mcmd, loop_id);
 727
 728         lun = a->u.isp24.fcp_cmnd.lun;
 729         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 730
 731         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 732             iocb, QLA24XX_MGMT_SEND_NACK);
 733 }
 734
 735 /* ha->tgt.sess_lock supposed to be held on entry */
 736 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 737         bool immediate)
 738 {
 739         struct qla_tgt *tgt = sess->tgt;
 740         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 741
 742         if (sess->deleted) {
 743                 /* Upgrade to unconditional deletion in case it was temporary */
 744                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 745                         list_del(&sess->del_list_entry);
 746                 else
 747                         return;
 748         }
 749
 750         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 751             "Scheduling sess %p for deletion\n", sess);
 752
 753         if (immediate) {
 754                 dev_loss_tmo = 0;
 755                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 756                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 757         } else {
 758                 sess->deleted = QLA_SESS_DELETION_PENDING;
 759                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 760         }
 761
 762         sess->expires = jiffies + dev_loss_tmo * HZ;
 763
 764         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 765             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 766             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 767             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 768             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 769             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 770             sess->generation);
 771
 772         if (immediate)
 773                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 774         else
 775                 schedule_delayed_work(&tgt->sess_del_work,
 776                     sess->expires - jiffies);
 777 }
 778
 779 /* ha->tgt.sess_lock supposed to be held on entry */
 780 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 781 {
 782         struct qla_tgt_sess *sess;
 783
 784         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 785                 qlt_schedule_sess_for_deletion(sess, true);
 786
 787         /* At this point tgt could be already dead */
 788 }
 789
 790 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 791         uint16_t *loop_id)
 792 {
 793         struct qla_hw_data *ha = vha->hw;
 794         dma_addr_t gid_list_dma;
 795         struct gid_list_info *gid_list;
 796         char *id_iter;
 797         int res, rc, i;
 798         uint16_t entries;
 799
 800         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 801             &gid_list_dma, GFP_KERNEL);
 802         if (!gid_list) {
 803                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 804                     "qla_target(%d): DMA Alloc failed of %u\n",
 805                     vha->vp_idx, qla2x00_gid_list_size(ha));
 806                 return -ENOMEM;
 807         }
 808
 809         /* Get list of logged in devices */
 810         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 811         if (rc != QLA_SUCCESS) {
 812                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 813                     "qla_target(%d): get_id_list() failed: %x\n",
 814                     vha->vp_idx, rc);
 815                 res = -EBUSY;
 816                 goto out_free_id_list;
 817         }
 818
 819         id_iter = (char *)gid_list;
 820         res = -ENOENT;
 821         for (i = 0; i < entries; i++) {
 822                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 823                 if ((gid->al_pa == s_id[2]) &&
 824                     (gid->area == s_id[1]) &&
 825                     (gid->domain == s_id[0])) {
 826                         *loop_id = le16_to_cpu(gid->loop_id);
 827                         res = 0;
 828                         break;
 829                 }
 830                 id_iter += ha->gid_list_info_size;
 831         }
 832
 833 out_free_id_list:
 834         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 835             gid_list, gid_list_dma);
 836         return res;
 837 }
 838
 839 /* ha->tgt.sess_lock supposed to be held on entry */
 840 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 841 {
 842         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 843
 844         list_del_init(&sess->del_list_entry);
 845         sess->deleted = 0;
 846 }
 847
 848 static void qlt_del_sess_work_fn(struct delayed_work *work)
 849 {
 850         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 851             sess_del_work);
 852         struct scsi_qla_host *vha = tgt->vha;
 853         struct qla_hw_data *ha = vha->hw;
 854         struct qla_tgt_sess *sess;
 855         unsigned long flags, elapsed;
 856
 857         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 858         while (!list_empty(&tgt->del_sess_list)) {
 859                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 860                     del_list_entry);
 861                 elapsed = jiffies;
 862                 if (time_after_eq(elapsed, sess->expires)) {
 863                         /* No turning back */
 864                         list_del_init(&sess->del_list_entry);
 865                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 866
 867                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 868                             "Timeout: sess %p about to be deleted\n",
 869                             sess);
 870                         if (sess->se_sess)
 871                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 872                         qlt_put_sess(sess);
 873                 } else {
 874                         schedule_delayed_work(&tgt->sess_del_work,
 875                             sess->expires - elapsed);
 876                         break;
 877                 }
 878         }
 879         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 880 }
 881
 882 /*
 883  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 884  * Caller must put it.
 885  */
 886 static struct qla_tgt_sess *qlt_create_sess(
 887         struct scsi_qla_host *vha,
 888         fc_port_t *fcport,
 889         bool local)
 890 {
 891         struct qla_hw_data *ha = vha->hw;
 892         struct qla_tgt_sess *sess;
 893         unsigned long flags;
 894
 895         /* Check to avoid double sessions */
 896         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 897         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 898                                 sess_list_entry) {
 899                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 900                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 901                             "Double sess %p found (s_id %x:%x:%x, "
 902                             "loop_id %d), updating to d_id %x:%x:%x, "
 903                             "loop_id %d", sess, sess->s_id.b.domain,
 904                             sess->s_id.b.al_pa, sess->s_id.b.area,
 905                             sess->loop_id, fcport->d_id.b.domain,
 906                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 907                             fcport->loop_id);
 908
 909                         /* Cannot undelete at this point */
 910                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 911                                 spin_unlock_irqrestore(&ha->tgt.sess_lock,
 912                                     flags);
 913                                 return NULL;
 914                         }
 915
 916                         if (sess->deleted)
 917                                 qlt_undelete_sess(sess);
 918
 919                         if (!sess->se_sess) {
 920                                 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 921                                     &sess->port_name[0], sess) < 0) {
 922                                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 923                                         return NULL;
 924                                 }
 925                         }
 926
 927                         kref_get(&sess->sess_kref);
 928                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 929                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 930
 931                         if (sess->local && !local)
 932                                 sess->local = 0;
 933
 934                         qlt_do_generation_tick(vha, &sess->generation);
 935
 936                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 937
 938                         return sess;
 939                 }
 940         }
 941         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 942
 943         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 944         if (!sess) {
 945                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 946                     "qla_target(%u): session allocation failed, all commands "
 947                     "from port %8phC will be refused", vha->vp_idx,
 948                     fcport->port_name);
 949
 950                 return NULL;
 951         }
 952         sess->tgt = vha->vha_tgt.qla_tgt;
 953         sess->vha = vha;
 954         sess->s_id = fcport->d_id;
 955         sess->loop_id = fcport->loop_id;
 956         sess->local = local;
 957         kref_init(&sess->sess_kref);
 958         INIT_LIST_HEAD(&sess->del_list_entry);
 959
 960         /* Under normal circumstances we want to logout from firmware when
 961          * session eventually ends and release corresponding nport handle.
 962          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 963          * code will adjust these flags as necessary. */
 964         sess->logout_on_delete = 1;
 965         sess->keep_nport_handle = 0;
 966
 967         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 968             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 969             sess, vha->vha_tgt.qla_tgt);
 970
 971         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 972         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 973         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 974
 975         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 976         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 977         vha->vha_tgt.qla_tgt->sess_count++;
 978         qlt_do_generation_tick(vha, &sess->generation);
 979         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 980
 981         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 982             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 983             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 984             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 985             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 986             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 987
 988         /*
 989          * Determine if this fc_port->port_name is allowed to access
 990          * target mode using explict NodeACLs+MappedLUNs, or using
 991          * TPG demo mode.  If this is successful a target mode FC nexus
 992          * is created.
 993          */
 994         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 995             &fcport->port_name[0], sess) < 0) {
 996                 return NULL;
 997         } else {
 998                 /*
 999                  * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
1000                  * access across ->tgt.sess_lock reaquire.
1001                  */
1002                 kref_get(&sess->sess_kref);
1003         }
1004
1005         return sess;
1006 }
1007
1008 /*
1009  * Called from qla2x00_reg_remote_port()
1010  */
1011 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
1012 {
1013         struct qla_hw_data *ha = vha->hw;
1014         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1015         struct qla_tgt_sess *sess;
1016         unsigned long flags;
1017
1018         if (!vha->hw->tgt.tgt_ops)
1019                 return;
1020
1021         if (!tgt || (fcport->port_type != FCT_INITIATOR))
1022                 return;
1023
1024         if (qla_ini_mode_enabled(vha))
1025                 return;
1026
1027         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1028         if (tgt->tgt_stop) {
1029                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1030                 return;
1031         }
1032         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1033         if (!sess) {
1034                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1035
1036                 mutex_lock(&vha->vha_tgt.tgt_mutex);
1037                 sess = qlt_create_sess(vha, fcport, false);
1038                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1039
1040                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1041         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1042                 /* Point of no return */
1043                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1044                 return;
1045         } else {
1046                 kref_get(&sess->sess_kref);
1047
1048                 if (sess->deleted) {
1049                         qlt_undelete_sess(sess);
1050
1051                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1052                             "qla_target(%u): %ssession for port %8phC "
1053                             "(loop ID %d) reappeared\n", vha->vp_idx,
1054                             sess->local ? "local " : "", sess->port_name,
1055                             sess->loop_id);
1056
1057                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
1058                             "Reappeared sess %p\n", sess);
1059                 }
1060                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
1061                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
1062         }
1063
1064         if (sess && sess->local) {
1065                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
1066                     "qla_target(%u): local session for "
1067                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
1068                     fcport->port_name, sess->loop_id);
1069                 sess->local = 0;
1070         }
1071         qlt_put_sess(sess);
1072         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1073 }
1074
1075 /*
1076  * max_gen - specifies maximum session generation
1077  * at which this deletion requestion is still valid
1078  */
1079 void
1080 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1081 {
1082         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1083         struct qla_tgt_sess *sess;
1084         unsigned long flags;
1085
1086         if (!vha->hw->tgt.tgt_ops)
1087                 return;
1088
1089         if (!tgt)
1090                 return;
1091
1092         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1093         if (tgt->tgt_stop) {
1094                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1095                 return;
1096         }
1097         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1098         if (!sess) {
1099                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1100                 return;
1101         }
1102
1103         if (max_gen - sess->generation < 0) {
1104                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1105                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1106                     "Ignoring stale deletion request for se_sess %p / sess %p"
1107                     " for port %8phC, req_gen %d, sess_gen %d\n",
1108                     sess->se_sess, sess, sess->port_name, max_gen,
1109                     sess->generation);
1110                 return;
1111         }
1112
1113         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1114
1115         sess->local = 1;
1116         qlt_schedule_sess_for_deletion(sess, false);
1117         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1118 }
1119
1120 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1121 {
1122         struct qla_hw_data *ha = tgt->ha;
1123         unsigned long flags;
1124         int res;
1125         /*
1126          * We need to protect against race, when tgt is freed before or
1127          * inside wake_up()
1128          */
1129         spin_lock_irqsave(&ha->hardware_lock, flags);
1130         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1131             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
1132             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
1133         res = (tgt->sess_count == 0);
1134         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1135
1136         return res;
1137 }
1138
1139 /* Called by tcm_qla2xxx configfs code */
1140 int qlt_stop_phase1(struct qla_tgt *tgt)
1141 {
1142         struct scsi_qla_host *vha = tgt->vha;
1143         struct qla_hw_data *ha = tgt->ha;
1144         unsigned long flags;
1145
1146         mutex_lock(&qla_tgt_mutex);
1147         if (!vha->fc_vport) {
1148                 struct Scsi_Host *sh = vha->host;
1149                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1150                 bool npiv_vports;
1151
1152                 spin_lock_irqsave(sh->host_lock, flags);
1153                 npiv_vports = (fc_host->npiv_vports_inuse);
1154                 spin_unlock_irqrestore(sh->host_lock, flags);
1155
1156                 if (npiv_vports) {
1157                         mutex_unlock(&qla_tgt_mutex);
1158                         return -EPERM;
1159                 }
1160         }
1161         if (tgt->tgt_stop || tgt->tgt_stopped) {
1162                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1163                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1164                 mutex_unlock(&qla_tgt_mutex);
1165                 return -EPERM;
1166         }
1167
1168         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1169             vha->host_no, vha);
1170         /*
1171          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1172          * Lock is needed, because we still can get an incoming packet.
1173          */
1174         mutex_lock(&vha->vha_tgt.tgt_mutex);
1175         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1176         tgt->tgt_stop = 1;
1177         qlt_clear_tgt_db(tgt);
1178         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1179         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1180         mutex_unlock(&qla_tgt_mutex);
1181
1182         flush_delayed_work(&tgt->sess_del_work);
1183
1184         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1185             "Waiting for sess works (tgt %p)", tgt);
1186         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1187         while (!list_empty(&tgt->sess_works_list)) {
1188                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1189                 flush_scheduled_work();
1190                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1191         }
1192         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1193
1194         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1195             "Waiting for tgt %p: list_empty(sess_list)=%d "
1196             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1197             tgt->sess_count);
1198
1199         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1200
1201         /* Big hammer */
1202         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1203                 qlt_disable_vha(vha);
1204
1205         /* Wait for sessions to clear out (just in case) */
1206         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1207         return 0;
1208 }
1209 EXPORT_SYMBOL(qlt_stop_phase1);
1210
1211 /* Called by tcm_qla2xxx configfs code */
1212 void qlt_stop_phase2(struct qla_tgt *tgt)
1213 {
1214         struct qla_hw_data *ha = tgt->ha;
1215         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1216         unsigned long flags;
1217
1218         if (tgt->tgt_stopped) {
1219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1220                     "Already in tgt->tgt_stopped state\n");
1221                 dump_stack();
1222                 return;
1223         }
1224
1225         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1226             "Waiting for %d IRQ commands to complete (tgt %p)",
1227             tgt->irq_cmd_count, tgt);
1228
1229         mutex_lock(&vha->vha_tgt.tgt_mutex);
1230         spin_lock_irqsave(&ha->hardware_lock, flags);
1231         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1232                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1233                 udelay(2);
1234                 spin_lock_irqsave(&ha->hardware_lock, flags);
1235         }
1236         tgt->tgt_stop = 0;
1237         tgt->tgt_stopped = 1;
1238         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1239         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1240
1241         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1242             tgt);
1243 }
1244 EXPORT_SYMBOL(qlt_stop_phase2);
1245
1246 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1247 static void qlt_release(struct qla_tgt *tgt)
1248 {
1249         scsi_qla_host_t *vha = tgt->vha;
1250
1251         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1252                 qlt_stop_phase2(tgt);
1253
1254         vha->vha_tgt.qla_tgt = NULL;
1255
1256         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1257             "Release of tgt %p finished\n", tgt);
1258
1259         kfree(tgt);
1260 }
1261
1262 /* ha->hardware_lock supposed to be held on entry */
1263 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1264         const void *param, unsigned int param_size)
1265 {
1266         struct qla_tgt_sess_work_param *prm;
1267         unsigned long flags;
1268
1269         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1270         if (!prm) {
1271                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1272                     "qla_target(%d): Unable to create session "
1273                     "work, command will be refused", 0);
1274                 return -ENOMEM;
1275         }
1276
1277         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1278             "Scheduling work (type %d, prm %p)"
1279             " to find session for param %p (size %d, tgt %p)\n",
1280             type, prm, param, param_size, tgt);
1281
1282         prm->type = type;
1283         memcpy(&prm->tm_iocb, param, param_size);
1284
1285         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1286         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1287         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1288
1289         schedule_work(&tgt->sess_work);
1290
1291         return 0;
1292 }
1293
1294 /*
1295  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1296  */
1297 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1298         struct imm_ntfy_from_isp *ntfy,
1299         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1300         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1301 {
1302         struct qla_hw_data *ha = vha->hw;
1303         request_t *pkt;
1304         struct nack_to_isp *nack;
1305
1306         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1307
1308         /* Send marker if required */
1309         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1310                 return;
1311
1312         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1313         if (!pkt) {
1314                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1315                     "qla_target(%d): %s failed: unable to allocate "
1316                     "request packet\n", vha->vp_idx, __func__);
1317                 return;
1318         }
1319
1320         if (vha->vha_tgt.qla_tgt != NULL)
1321                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1322
1323         pkt->entry_type = NOTIFY_ACK_TYPE;
1324         pkt->entry_count = 1;
1325
1326         nack = (struct nack_to_isp *)pkt;
1327         nack->ox_id = ntfy->ox_id;
1328
1329         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1330         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1331                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1332                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1333         }
1334         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1335         nack->u.isp24.status = ntfy->u.isp24.status;
1336         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1337         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1338         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1339         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1340         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1341         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1342         nack->u.isp24.srr_reject_code = srr_reject_code;
1343         nack->u.isp24.srr_reject_code_expl = srr_explan;
1344         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1345
1346         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1347             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1348             vha->vp_idx, nack->u.isp24.status);
1349
1350         /* Memory Barrier */
1351         wmb();
1352         qla2x00_start_iocbs(vha, vha->req);
1353 }
1354
1355 /*
1356  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1357  */
1358 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1359         struct abts_recv_from_24xx *abts, uint32_t status,
1360         bool ids_reversed)
1361 {
1362         struct qla_hw_data *ha = vha->hw;
1363         struct abts_resp_to_24xx *resp;
1364         uint32_t f_ctl;
1365         uint8_t *p;
1366
1367         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1368             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1369             ha, abts, status);
1370
1371         /* Send marker if required */
1372         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1373                 return;
1374
1375         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1376         if (!resp) {
1377                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1378                     "qla_target(%d): %s failed: unable to allocate "
1379                     "request packet", vha->vp_idx, __func__);
1380                 return;
1381         }
1382
1383         resp->entry_type = ABTS_RESP_24XX;
1384         resp->entry_count = 1;
1385         resp->nport_handle = abts->nport_handle;
1386         resp->vp_index = vha->vp_idx;
1387         resp->sof_type = abts->sof_type;
1388         resp->exchange_address = abts->exchange_address;
1389         resp->fcp_hdr_le = abts->fcp_hdr_le;
1390         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1391             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1392             F_CTL_SEQ_INITIATIVE);
1393         p = (uint8_t *)&f_ctl;
1394         resp->fcp_hdr_le.f_ctl[0] = *p++;
1395         resp->fcp_hdr_le.f_ctl[1] = *p++;
1396         resp->fcp_hdr_le.f_ctl[2] = *p;
1397         if (ids_reversed) {
1398                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1399                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1400                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1401                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1402                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1403                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1404         } else {
1405                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1406                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1407                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1408                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1409                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1410                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1411         }
1412         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1413         if (status == FCP_TMF_CMPL) {
1414                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1415                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1416                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1417                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1418                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1419                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1420         } else {
1421                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1422                 resp->payload.ba_rjt.reason_code =
1423                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1424                 /* Other bytes are zero */
1425         }
1426
1427         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1428
1429         /* Memory Barrier */
1430         wmb();
1431         qla2x00_start_iocbs(vha, vha->req);
1432 }
1433
1434 /*
1435  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1436  */
1437 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1438         struct abts_resp_from_24xx_fw *entry)
1439 {
1440         struct ctio7_to_24xx *ctio;
1441
1442         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1443             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1444         /* Send marker if required */
1445         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1446                 return;
1447
1448         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1449         if (ctio == NULL) {
1450                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1451                     "qla_target(%d): %s failed: unable to allocate "
1452                     "request packet\n", vha->vp_idx, __func__);
1453                 return;
1454         }
1455
1456         /*
1457          * We've got on entrance firmware's response on by us generated
1458          * ABTS response. So, in it ID fields are reversed.
1459          */
1460
1461         ctio->entry_type = CTIO_TYPE7;
1462         ctio->entry_count = 1;
1463         ctio->nport_handle = entry->nport_handle;
1464         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1465         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1466         ctio->vp_index = vha->vp_idx;
1467         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1468         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1469         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1470         ctio->exchange_addr = entry->exchange_addr_to_abort;
1471         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1472                                             CTIO7_FLAGS_TERMINATE);
1473         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1474
1475         /* Memory Barrier */
1476         wmb();
1477         qla2x00_start_iocbs(vha, vha->req);
1478
1479         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1480             FCP_TMF_CMPL, true);
1481 }
1482
1483 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1484 {
1485         struct qla_tgt_sess_op *op;
1486         struct qla_tgt_cmd *cmd;
1487
1488         spin_lock(&vha->cmd_list_lock);
1489
1490         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1491                 if (tag == op->atio.u.isp24.exchange_addr) {
1492                         op->aborted = true;
1493                         spin_unlock(&vha->cmd_list_lock);
1494                         return 1;
1495                 }
1496         }
1497
1498         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1499                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1500                         cmd->aborted = 1;
1501                         spin_unlock(&vha->cmd_list_lock);
1502                         return 1;
1503                 }
1504         }
1505
1506         spin_unlock(&vha->cmd_list_lock);
1507         return 0;
1508 }
1509
1510 /* drop cmds for the given lun
1511  * XXX only looks for cmds on the port through which lun reset was recieved
1512  * XXX does not go through the list of other port (which may have cmds
1513  *     for the same lun)
1514  */
1515 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1516                                 uint32_t lun, uint8_t *s_id)
1517 {
1518         struct qla_tgt_sess_op *op;
1519         struct qla_tgt_cmd *cmd;
1520         uint32_t key;
1521
1522         key = sid_to_key(s_id);
1523         spin_lock(&vha->cmd_list_lock);
1524         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1525                 uint32_t op_key;
1526                 uint32_t op_lun;
1527
1528                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1529                 op_lun = scsilun_to_int(
1530                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1531                 if (op_key == key && op_lun == lun)
1532                         op->aborted = true;
1533         }
1534         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1535                 uint32_t cmd_key;
1536                 uint32_t cmd_lun;
1537
1538                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1539                 cmd_lun = scsilun_to_int(
1540                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1541                 if (cmd_key == key && cmd_lun == lun)
1542                         cmd->aborted = 1;
1543         }
1544         spin_unlock(&vha->cmd_list_lock);
1545 }
1546
1547 /* ha->hardware_lock supposed to be held on entry */
1548 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1549         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1550 {
1551         struct qla_hw_data *ha = vha->hw;
1552         struct se_session *se_sess = sess->se_sess;
1553         struct qla_tgt_mgmt_cmd *mcmd;
1554         struct se_cmd *se_cmd;
1555         u32 lun = 0;
1556         int rc;
1557         bool found_lun = false;
1558
1559         spin_lock(&se_sess->sess_cmd_lock);
1560         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1561                 struct qla_tgt_cmd *cmd =
1562                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1563                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1564                         lun = cmd->unpacked_lun;
1565                         found_lun = true;
1566                         break;
1567                 }
1568         }
1569         spin_unlock(&se_sess->sess_cmd_lock);
1570
1571         /* cmd not in LIO lists, look in qla list */
1572         if (!found_lun) {
1573                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1574                         /* send TASK_ABORT response immediately */
1575                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1576                         return 0;
1577                 } else {
1578                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1579                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1580                             abts->exchange_addr_to_abort);
1581                         return -ENOENT;
1582                 }
1583         }
1584
1585         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1586             "qla_target(%d): task abort (tag=%d)\n",
1587             vha->vp_idx, abts->exchange_addr_to_abort);
1588
1589         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1590         if (mcmd == NULL) {
1591                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1592                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1593                     vha->vp_idx, __func__);
1594                 return -ENOMEM;
1595         }
1596         memset(mcmd, 0, sizeof(*mcmd));
1597
1598         mcmd->sess = sess;
1599         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1600         mcmd->reset_count = vha->hw->chip_reset;
1601
1602         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1603             abts->exchange_addr_to_abort);
1604         if (rc != 0) {
1605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1606                     "qla_target(%d):  tgt_ops->handle_tmr()"
1607                     " failed: %d", vha->vp_idx, rc);
1608                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1609                 return -EFAULT;
1610         }
1611
1612         return 0;
1613 }
1614
1615 /*
1616  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1617  */
1618 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1619         struct abts_recv_from_24xx *abts)
1620 {
1621         struct qla_hw_data *ha = vha->hw;
1622         struct qla_tgt_sess *sess;
1623         uint32_t tag = abts->exchange_addr_to_abort;
1624         uint8_t s_id[3];
1625         int rc;
1626         unsigned long flags;
1627
1628         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1629                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1630                     "qla_target(%d): ABTS: Abort Sequence not "
1631                     "supported\n", vha->vp_idx);
1632                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1633                 return;
1634         }
1635
1636         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1637                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1638                     "qla_target(%d): ABTS: Unknown Exchange "
1639                     "Address received\n", vha->vp_idx);
1640                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1641                 return;
1642         }
1643
1644         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1645             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1646             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1647             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1648             le32_to_cpu(abts->fcp_hdr_le.parameter));
1649
1650         s_id[0] = abts->fcp_hdr_le.s_id[2];
1651         s_id[1] = abts->fcp_hdr_le.s_id[1];
1652         s_id[2] = abts->fcp_hdr_le.s_id[0];
1653
1654         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1655         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1656         if (!sess) {
1657                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1658                     "qla_target(%d): task abort for non-existant session\n",
1659                     vha->vp_idx);
1660                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1661                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1662
1663                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1664
1665                 if (rc != 0) {
1666                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1667                             false);
1668                 }
1669                 return;
1670         }
1671         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1672
1673
1674         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1675                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1676                 return;
1677         }
1678
1679         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1680         if (rc != 0) {
1681                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1682                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1683                     vha->vp_idx, rc);
1684                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1685                 return;
1686         }
1687 }
1688
1689 /*
1690  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1691  */
1692 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1693         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1694 {
1695         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1696         struct ctio7_to_24xx *ctio;
1697         uint16_t temp;
1698
1699         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1700             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1701             ha, atio, resp_code);
1702
1703         /* Send marker if required */
1704         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1705                 return;
1706
1707         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1708         if (ctio == NULL) {
1709                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1710                     "qla_target(%d): %s failed: unable to allocate "
1711                     "request packet\n", ha->vp_idx, __func__);
1712                 return;
1713         }
1714
1715         ctio->entry_type = CTIO_TYPE7;
1716         ctio->entry_count = 1;
1717         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1718         ctio->nport_handle = mcmd->sess->loop_id;
1719         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1720         ctio->vp_index = ha->vp_idx;
1721         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1722         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1723         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1724         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1725         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1726             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1727         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1728         ctio->u.status1.ox_id = cpu_to_le16(temp);
1729         ctio->u.status1.scsi_status =
1730             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1731         ctio->u.status1.response_len = cpu_to_le16(8);
1732         ctio->u.status1.sense_data[0] = resp_code;
1733
1734         /* Memory Barrier */
1735         wmb();
1736         qla2x00_start_iocbs(ha, ha->req);
1737 }
1738
1739 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1740 {
1741         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1742 }
1743 EXPORT_SYMBOL(qlt_free_mcmd);
1744
1745 /* callback from target fabric module code */
1746 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1747 {
1748         struct scsi_qla_host *vha = mcmd->sess->vha;
1749         struct qla_hw_data *ha = vha->hw;
1750         unsigned long flags;
1751
1752         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1753             "TM response mcmd (%p) status %#x state %#x",
1754             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1755
1756         spin_lock_irqsave(&ha->hardware_lock, flags);
1757
1758         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1759                 /*
1760                  * Either the port is not online or this request was from
1761                  * previous life, just abort the processing.
1762                  */
1763                 ql_dbg(ql_dbg_async, vha, 0xe100,
1764                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
1765                         vha->flags.online, qla2x00_reset_active(vha),
1766                         mcmd->reset_count, ha->chip_reset);
1767                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1768                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1769                 return;
1770         }
1771
1772         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1773                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1774                     0, 0, 0, 0, 0, 0);
1775         else {
1776                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1777                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1778                             mcmd->fc_tm_rsp, false);
1779                 else
1780                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1781                             mcmd->fc_tm_rsp);
1782         }
1783         /*
1784          * Make the callback for ->free_mcmd() to queue_work() and invoke
1785          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1786          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1787          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1788          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1789          * qlt_xmit_tm_rsp() returns here..
1790          */
1791         ha->tgt.tgt_ops->free_mcmd(mcmd);
1792         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1793 }
1794 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1795
1796 /* No locks */
1797 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1798 {
1799         struct qla_tgt_cmd *cmd = prm->cmd;
1800
1801         BUG_ON(cmd->sg_cnt == 0);
1802
1803         prm->sg = (struct scatterlist *)cmd->sg;
1804         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1805             cmd->sg_cnt, cmd->dma_data_direction);
1806         if (unlikely(prm->seg_cnt == 0))
1807                 goto out_err;
1808
1809         prm->cmd->sg_mapped = 1;
1810
1811         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1812                 /*
1813                  * If greater than four sg entries then we need to allocate
1814                  * the continuation entries
1815                  */
1816                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1817                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1818                         prm->tgt->datasegs_per_cmd,
1819                         prm->tgt->datasegs_per_cont);
1820         } else {
1821                 /* DIF */
1822                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1823                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1824                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1825                         prm->tot_dsds = prm->seg_cnt;
1826                 } else
1827                         prm->tot_dsds = prm->seg_cnt;
1828
1829                 if (cmd->prot_sg_cnt) {
1830                         prm->prot_sg      = cmd->prot_sg;
1831                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1832                                 cmd->prot_sg, cmd->prot_sg_cnt,
1833                                 cmd->dma_data_direction);
1834                         if (unlikely(prm->prot_seg_cnt == 0))
1835                                 goto out_err;
1836
1837                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1838                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1839                                 /* Dif Bundling not support here */
1840                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1841                                                                 cmd->blk_sz);
1842                                 prm->tot_dsds += prm->prot_seg_cnt;
1843                         } else
1844                                 prm->tot_dsds += prm->prot_seg_cnt;
1845                 }
1846         }
1847
1848         return 0;
1849
1850 out_err:
1851         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1852             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1853             0, prm->cmd->sg_cnt);
1854         return -1;
1855 }
1856
1857 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1858 {
1859         struct qla_hw_data *ha = vha->hw;
1860
1861         if (!cmd->sg_mapped)
1862                 return;
1863
1864         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1865         cmd->sg_mapped = 0;
1866
1867         if (cmd->prot_sg_cnt)
1868                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1869                         cmd->dma_data_direction);
1870
1871         if (cmd->ctx_dsd_alloced)
1872                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1873
1874         if (cmd->ctx)
1875                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1876 }
1877
1878 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1879         uint32_t req_cnt)
1880 {
1881         uint32_t cnt, cnt_in;
1882
1883         if (vha->req->cnt < (req_cnt + 2)) {
1884                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1885                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1886
1887                 if  (vha->req->ring_index < cnt)
1888                         vha->req->cnt = cnt - vha->req->ring_index;
1889                 else
1890                         vha->req->cnt = vha->req->length -
1891                             (vha->req->ring_index - cnt);
1892
1893                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1894                         ql_dbg(ql_dbg_io, vha, 0x305a,
1895                             "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1896                             vha->vp_idx, vha->req->ring_index,
1897                             vha->req->cnt, req_cnt, cnt, cnt_in,
1898                             vha->req->length);
1899                         return -EAGAIN;
1900                 }
1901         }
1902
1903         vha->req->cnt -= req_cnt;
1904
1905         return 0;
1906 }
1907
1908 /*
1909  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1910  */
1911 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1912 {
1913         /* Adjust ring index. */
1914         vha->req->ring_index++;
1915         if (vha->req->ring_index == vha->req->length) {
1916                 vha->req->ring_index = 0;
1917                 vha->req->ring_ptr = vha->req->ring;
1918         } else {
1919                 vha->req->ring_ptr++;
1920         }
1921         return (cont_entry_t *)vha->req->ring_ptr;
1922 }
1923
1924 /* ha->hardware_lock supposed to be held on entry */
1925 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1926 {
1927         struct qla_hw_data *ha = vha->hw;
1928         uint32_t h;
1929
1930         h = ha->tgt.current_handle;
1931         /* always increment cmd handle */
1932         do {
1933                 ++h;
1934                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1935                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1936                 if (h == ha->tgt.current_handle) {
1937                         ql_dbg(ql_dbg_io, vha, 0x305b,
1938                             "qla_target(%d): Ran out of "
1939                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1940                         h = QLA_TGT_NULL_HANDLE;
1941                         break;
1942                 }
1943         } while ((h == QLA_TGT_NULL_HANDLE) ||
1944             (h == QLA_TGT_SKIP_HANDLE) ||
1945             (ha->tgt.cmds[h-1] != NULL));
1946
1947         if (h != QLA_TGT_NULL_HANDLE)
1948                 ha->tgt.current_handle = h;
1949
1950         return h;
1951 }
1952
1953 /* ha->hardware_lock supposed to be held on entry */
1954 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1955         struct scsi_qla_host *vha)
1956 {
1957         uint32_t h;
1958         struct ctio7_to_24xx *pkt;
1959         struct qla_hw_data *ha = vha->hw;
1960         struct atio_from_isp *atio = &prm->cmd->atio;
1961         uint16_t temp;
1962
1963         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1964         prm->pkt = pkt;
1965         memset(pkt, 0, sizeof(*pkt));
1966
1967         pkt->entry_type = CTIO_TYPE7;
1968         pkt->entry_count = (uint8_t)prm->req_cnt;
1969         pkt->vp_index = vha->vp_idx;
1970
1971         h = qlt_make_handle(vha);
1972         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1973                 /*
1974                  * CTIO type 7 from the firmware doesn't provide a way to
1975                  * know the initiator's LOOP ID, hence we can't find
1976                  * the session and, so, the command.
1977                  */
1978                 return -EAGAIN;
1979         } else
1980                 ha->tgt.cmds[h-1] = prm->cmd;
1981
1982         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1983         pkt->nport_handle = prm->cmd->loop_id;
1984         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1985         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1986         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1987         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1988         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1989         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1990         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1991         pkt->u.status0.ox_id = cpu_to_le16(temp);
1992         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1993
1994         return 0;
1995 }
1996
1997 /*
1998  * ha->hardware_lock supposed to be held on entry. We have already made sure
1999  * that there is sufficient amount of request entries to not drop it.
2000  */
2001 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
2002         struct scsi_qla_host *vha)
2003 {
2004         int cnt;
2005         uint32_t *dword_ptr;
2006         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2007
2008         /* Build continuation packets */
2009         while (prm->seg_cnt > 0) {
2010                 cont_a64_entry_t *cont_pkt64 =
2011                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2012
2013                 /*
2014                  * Make sure that from cont_pkt64 none of
2015                  * 64-bit specific fields used for 32-bit
2016                  * addressing. Cast to (cont_entry_t *) for
2017                  * that.
2018                  */
2019
2020                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2021
2022                 cont_pkt64->entry_count = 1;
2023                 cont_pkt64->sys_define = 0;
2024
2025                 if (enable_64bit_addressing) {
2026                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2027                         dword_ptr =
2028                             (uint32_t *)&cont_pkt64->dseg_0_address;
2029                 } else {
2030                         cont_pkt64->entry_type = CONTINUE_TYPE;
2031                         dword_ptr =
2032                             (uint32_t *)&((cont_entry_t *)
2033                                 cont_pkt64)->dseg_0_address;
2034                 }
2035
2036                 /* Load continuation entry data segments */
2037                 for (cnt = 0;
2038                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2039                     cnt++, prm->seg_cnt--) {
2040                         *dword_ptr++ =
2041                             cpu_to_le32(pci_dma_lo32
2042                                 (sg_dma_address(prm->sg)));
2043                         if (enable_64bit_addressing) {
2044                                 *dword_ptr++ =
2045                                     cpu_to_le32(pci_dma_hi32
2046                                         (sg_dma_address
2047                                         (prm->sg)));
2048                         }
2049                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2050
2051                         prm->sg = sg_next(prm->sg);
2052                 }
2053         }
2054 }
2055
2056 /*
2057  * ha->hardware_lock supposed to be held on entry. We have already made sure
2058  * that there is sufficient amount of request entries to not drop it.
2059  */
2060 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2061         struct scsi_qla_host *vha)
2062 {
2063         int cnt;
2064         uint32_t *dword_ptr;
2065         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2066         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2067
2068         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2069
2070         /* Setup packet address segment pointer */
2071         dword_ptr = pkt24->u.status0.dseg_0_address;
2072
2073         /* Set total data segment count */
2074         if (prm->seg_cnt)
2075                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2076
2077         if (prm->seg_cnt == 0) {
2078                 /* No data transfer */
2079                 *dword_ptr++ = 0;
2080                 *dword_ptr = 0;
2081                 return;
2082         }
2083
2084         /* If scatter gather */
2085
2086         /* Load command entry data segments */
2087         for (cnt = 0;
2088             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2089             cnt++, prm->seg_cnt--) {
2090                 *dword_ptr++ =
2091                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2092                 if (enable_64bit_addressing) {
2093                         *dword_ptr++ =
2094                             cpu_to_le32(pci_dma_hi32(
2095                                 sg_dma_address(prm->sg)));
2096                 }
2097                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2098
2099                 prm->sg = sg_next(prm->sg);
2100         }
2101
2102         qlt_load_cont_data_segments(prm, vha);
2103 }
2104
2105 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2106 {
2107         return cmd->bufflen > 0;
2108 }
2109
2110 /*
2111  * Called without ha->hardware_lock held
2112  */
2113 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2114         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2115         uint32_t *full_req_cnt)
2116 {
2117         struct qla_tgt *tgt = cmd->tgt;
2118         struct scsi_qla_host *vha = tgt->vha;
2119         struct qla_hw_data *ha = vha->hw;
2120         struct se_cmd *se_cmd = &cmd->se_cmd;
2121
2122         prm->cmd = cmd;
2123         prm->tgt = tgt;
2124         prm->rq_result = scsi_status;
2125         prm->sense_buffer = &cmd->sense_buffer[0];
2126         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2127         prm->sg = NULL;
2128         prm->seg_cnt = -1;
2129         prm->req_cnt = 1;
2130         prm->add_status_pkt = 0;
2131
2132         /* Send marker if required */
2133         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2134                 return -EFAULT;
2135
2136         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2137                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2138                         return -EAGAIN;
2139         }
2140
2141         *full_req_cnt = prm->req_cnt;
2142
2143         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2144                 prm->residual = se_cmd->residual_count;
2145                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2146                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2147                        prm->residual, se_cmd->tag,
2148                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2149                        cmd->bufflen, prm->rq_result);
2150                 prm->rq_result |= SS_RESIDUAL_UNDER;
2151         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2152                 prm->residual = se_cmd->residual_count;
2153                 ql_dbg(ql_dbg_io, vha, 0x305d,
2154                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2155                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2156                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2157                 prm->rq_result |= SS_RESIDUAL_OVER;
2158         }
2159
2160         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2161                 /*
2162                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2163                  * ignored in *xmit_response() below
2164                  */
2165                 if (qlt_has_data(cmd)) {
2166                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2167                             (IS_FWI2_CAPABLE(ha) &&
2168                             (prm->rq_result != 0))) {
2169                                 prm->add_status_pkt = 1;
2170                                 (*full_req_cnt)++;
2171                         }
2172                 }
2173         }
2174
2175         return 0;
2176 }
2177
2178 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2179         struct qla_tgt_cmd *cmd, int sending_sense)
2180 {
2181         if (ha->tgt.enable_class_2)
2182                 return 0;
2183
2184         if (sending_sense)
2185                 return cmd->conf_compl_supported;
2186         else
2187                 return ha->tgt.enable_explicit_conf &&
2188                     cmd->conf_compl_supported;
2189 }
2190
2191 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2192 /*
2193  *  Original taken from the XFS code
2194  */
2195 static unsigned long qlt_srr_random(void)
2196 {
2197         static int Inited;
2198         static unsigned long RandomValue;
2199         static DEFINE_SPINLOCK(lock);
2200         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2201         register long rv;
2202         register long lo;
2203         register long hi;
2204         unsigned long flags;
2205
2206         spin_lock_irqsave(&lock, flags);
2207         if (!Inited) {
2208                 RandomValue = jiffies;
2209                 Inited = 1;
2210         }
2211         rv = RandomValue;
2212         hi = rv / 127773;
2213         lo = rv % 127773;
2214         rv = 16807 * lo - 2836 * hi;
2215         if (rv <= 0)
2216                 rv += 2147483647;
2217         RandomValue = rv;
2218         spin_unlock_irqrestore(&lock, flags);
2219         return rv;
2220 }
2221
2222 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2223 {
2224 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2225         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2226             == 50) {
2227                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2228                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2229                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2230         }
2231 #endif
2232         /*
2233          * It's currently not possible to simulate SRRs for FCP_WRITE without
2234          * a physical link layer failure, so don't even try here..
2235          */
2236         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2237                 return;
2238
2239         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2240             ((qlt_srr_random() % 100) == 20)) {
2241                 int i, leave = 0;
2242                 unsigned int tot_len = 0;
2243
2244                 while (leave == 0)
2245                         leave = qlt_srr_random() % cmd->sg_cnt;
2246
2247                 for (i = 0; i < leave; i++)
2248                         tot_len += cmd->sg[i].length;
2249
2250                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2251                     "Cutting cmd %p (tag %d) buffer"
2252                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2253                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2254                     cmd->bufflen, cmd->sg_cnt);
2255
2256                 cmd->bufflen = tot_len;
2257                 cmd->sg_cnt = leave;
2258         }
2259
2260         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2261                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2262
2263                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2264                     "Cutting cmd %p (tag %d) buffer head "
2265                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2266                     cmd->bufflen);
2267                 if (offset == 0)
2268                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2269                 else if (qlt_set_data_offset(cmd, offset)) {
2270                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2271                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2272                 }
2273         }
2274 }
2275 #else
2276 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2277 {}
2278 #endif
2279
2280 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2281         struct qla_tgt_prm *prm)
2282 {
2283         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2284             (uint32_t)sizeof(ctio->u.status1.sense_data));
2285         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2286         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2287                 ctio->u.status0.flags |= cpu_to_le16(
2288                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2289                     CTIO7_FLAGS_CONFORM_REQ);
2290         }
2291         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2292         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2293         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2294                 int i;
2295
2296                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2297                         if (prm->cmd->se_cmd.scsi_status != 0) {
2298                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2299                                     "Skipping EXPLICIT_CONFORM and "
2300                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2301                                     "non GOOD status\n");
2302                                 goto skip_explict_conf;
2303                         }
2304                         ctio->u.status1.flags |= cpu_to_le16(
2305                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2306                             CTIO7_FLAGS_CONFORM_REQ);
2307                 }
2308 skip_explict_conf:
2309                 ctio->u.status1.flags &=
2310                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2311                 ctio->u.status1.flags |=
2312                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2313                 ctio->u.status1.scsi_status |=
2314                     cpu_to_le16(SS_SENSE_LEN_VALID);
2315                 ctio->u.status1.sense_length =
2316                     cpu_to_le16(prm->sense_buffer_len);
2317                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2318                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2319                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2320 #if 0
2321                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2322                         static int q;
2323                         if (q < 10) {
2324                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2325                                     "qla_target(%d): %d bytes of sense "
2326                                     "lost", prm->tgt->ha->vp_idx,
2327                                     prm->sense_buffer_len % 4);
2328                                 q++;
2329                         }
2330                 }
2331 #endif
2332         } else {
2333                 ctio->u.status1.flags &=
2334                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2335                 ctio->u.status1.flags |=
2336                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2337                 ctio->u.status1.sense_length = 0;
2338                 memset(ctio->u.status1.sense_data, 0,
2339                     sizeof(ctio->u.status1.sense_data));
2340         }
2341
2342         /* Sense with len > 24, is it possible ??? */
2343 }
2344
2345
2346
2347 /* diff  */
2348 static inline int
2349 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2350 {
2351         /*
2352          * Uncomment when corresponding SCSI changes are done.
2353          *
2354          if (!sp->cmd->prot_chk)
2355          return 0;
2356          *
2357          */
2358         switch (se_cmd->prot_op) {
2359         case TARGET_PROT_DOUT_INSERT:
2360         case TARGET_PROT_DIN_STRIP:
2361                 if (ql2xenablehba_err_chk >= 1)
2362                         return 1;
2363                 break;
2364         case TARGET_PROT_DOUT_PASS:
2365         case TARGET_PROT_DIN_PASS:
2366                 if (ql2xenablehba_err_chk >= 2)
2367                         return 1;
2368                 break;
2369         case TARGET_PROT_DIN_INSERT:
2370         case TARGET_PROT_DOUT_STRIP:
2371                 return 1;
2372         default:
2373                 break;
2374         }
2375         return 0;
2376 }
2377
2378 /*
2379  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2380  *
2381  */
2382 static inline void
2383 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2384 {
2385         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2386
2387         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2388          * have been immplemented by TCM, before AppTag is avail.
2389          * Look for modesense_handlers[]
2390          */
2391         ctx->app_tag = 0;
2392         ctx->app_tag_mask[0] = 0x0;
2393         ctx->app_tag_mask[1] = 0x0;
2394
2395         switch (se_cmd->prot_type) {
2396         case TARGET_DIF_TYPE0_PROT:
2397                 /*
2398                  * No check for ql2xenablehba_err_chk, as it would be an
2399                  * I/O error if hba tag generation is not done.
2400                  */
2401                 ctx->ref_tag = cpu_to_le32(lba);
2402
2403                 if (!qlt_hba_err_chk_enabled(se_cmd))
2404                         break;
2405
2406                 /* enable ALL bytes of the ref tag */
2407                 ctx->ref_tag_mask[0] = 0xff;
2408                 ctx->ref_tag_mask[1] = 0xff;
2409                 ctx->ref_tag_mask[2] = 0xff;
2410                 ctx->ref_tag_mask[3] = 0xff;
2411                 break;
2412         /*
2413          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2414          * 16 bit app tag.
2415          */
2416         case TARGET_DIF_TYPE1_PROT:
2417                 ctx->ref_tag = cpu_to_le32(lba);
2418
2419                 if (!qlt_hba_err_chk_enabled(se_cmd))
2420                         break;
2421
2422                 /* enable ALL bytes of the ref tag */
2423                 ctx->ref_tag_mask[0] = 0xff;
2424                 ctx->ref_tag_mask[1] = 0xff;
2425                 ctx->ref_tag_mask[2] = 0xff;
2426                 ctx->ref_tag_mask[3] = 0xff;
2427                 break;
2428         /*
2429          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2430          * match LBA in CDB + N
2431          */
2432         case TARGET_DIF_TYPE2_PROT:
2433                 ctx->ref_tag = cpu_to_le32(lba);
2434
2435                 if (!qlt_hba_err_chk_enabled(se_cmd))
2436                         break;
2437
2438                 /* enable ALL bytes of the ref tag */
2439                 ctx->ref_tag_mask[0] = 0xff;
2440                 ctx->ref_tag_mask[1] = 0xff;
2441                 ctx->ref_tag_mask[2] = 0xff;
2442                 ctx->ref_tag_mask[3] = 0xff;
2443                 break;
2444
2445         /* For Type 3 protection: 16 bit GUARD only */
2446         case TARGET_DIF_TYPE3_PROT:
2447                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2448                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2449                 break;
2450         }
2451 }
2452
2453
2454 static inline int
2455 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2456 {
2457         uint32_t                *cur_dsd;
2458         uint32_t                transfer_length = 0;
2459         uint32_t                data_bytes;
2460         uint32_t                dif_bytes;
2461         uint8_t                 bundling = 1;
2462         uint8_t                 *clr_ptr;
2463         struct crc_context      *crc_ctx_pkt = NULL;
2464         struct qla_hw_data      *ha;
2465         struct ctio_crc2_to_fw  *pkt;
2466         dma_addr_t              crc_ctx_dma;
2467         uint16_t                fw_prot_opts = 0;
2468         struct qla_tgt_cmd      *cmd = prm->cmd;
2469         struct se_cmd           *se_cmd = &cmd->se_cmd;
2470         uint32_t h;
2471         struct atio_from_isp *atio = &prm->cmd->atio;
2472         uint16_t t16;
2473
2474         ha = vha->hw;
2475
2476         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2477         prm->pkt = pkt;
2478         memset(pkt, 0, sizeof(*pkt));
2479
2480         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2481                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2482                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2483                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2484
2485         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2486             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2487                 bundling = 0;
2488
2489         /* Compute dif len and adjust data len to incude protection */
2490         data_bytes = cmd->bufflen;
2491         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2492
2493         switch (se_cmd->prot_op) {
2494         case TARGET_PROT_DIN_INSERT:
2495         case TARGET_PROT_DOUT_STRIP:
2496                 transfer_length = data_bytes;
2497                 data_bytes += dif_bytes;
2498                 break;
2499
2500         case TARGET_PROT_DIN_STRIP:
2501         case TARGET_PROT_DOUT_INSERT:
2502         case TARGET_PROT_DIN_PASS:
2503         case TARGET_PROT_DOUT_PASS:
2504                 transfer_length = data_bytes + dif_bytes;
2505                 break;
2506
2507         default:
2508                 BUG();
2509                 break;
2510         }
2511
2512         if (!qlt_hba_err_chk_enabled(se_cmd))
2513                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2514         /* HBA error checking enabled */
2515         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2516                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2517                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2518                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2519                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2520                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2521         }
2522
2523         switch (se_cmd->prot_op) {
2524         case TARGET_PROT_DIN_INSERT:
2525         case TARGET_PROT_DOUT_INSERT:
2526                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2527                 break;
2528         case TARGET_PROT_DIN_STRIP:
2529         case TARGET_PROT_DOUT_STRIP:
2530                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2531                 break;
2532         case TARGET_PROT_DIN_PASS:
2533         case TARGET_PROT_DOUT_PASS:
2534                 fw_prot_opts |= PO_MODE_DIF_PASS;
2535                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2536                 break;
2537         default:/* Normal Request */
2538                 fw_prot_opts |= PO_MODE_DIF_PASS;
2539                 break;
2540         }
2541
2542
2543         /* ---- PKT ---- */
2544         /* Update entry type to indicate Command Type CRC_2 IOCB */
2545         pkt->entry_type  = CTIO_CRC2;
2546         pkt->entry_count = 1;
2547         pkt->vp_index = vha->vp_idx;
2548
2549         h = qlt_make_handle(vha);
2550         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2551                 /*
2552                  * CTIO type 7 from the firmware doesn't provide a way to
2553                  * know the initiator's LOOP ID, hence we can't find
2554                  * the session and, so, the command.
2555                  */
2556                 return -EAGAIN;
2557         } else
2558                 ha->tgt.cmds[h-1] = prm->cmd;
2559
2560
2561         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2562         pkt->nport_handle = prm->cmd->loop_id;
2563         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2564         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2565         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2566         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2567         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2568
2569         /* silence compile warning */
2570         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2571         pkt->ox_id  = cpu_to_le16(t16);
2572
2573         t16 = (atio->u.isp24.attr << 9);
2574         pkt->flags |= cpu_to_le16(t16);
2575         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2576
2577         /* Set transfer direction */
2578         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2579                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2580         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2581                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2582
2583
2584         pkt->dseg_count = prm->tot_dsds;
2585         /* Fibre channel byte count */
2586         pkt->transfer_length = cpu_to_le32(transfer_length);
2587
2588
2589         /* ----- CRC context -------- */
2590
2591         /* Allocate CRC context from global pool */
2592         crc_ctx_pkt = cmd->ctx =
2593             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2594
2595         if (!crc_ctx_pkt)
2596                 goto crc_queuing_error;
2597
2598         /* Zero out CTX area. */
2599         clr_ptr = (uint8_t *)crc_ctx_pkt;
2600         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2601
2602         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2603         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2604
2605         /* Set handle */
2606         crc_ctx_pkt->handle = pkt->handle;
2607
2608         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2609
2610         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2611         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2612         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2613
2614
2615         if (!bundling) {
2616                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2617         } else {
2618                 /*
2619                  * Configure Bundling if we need to fetch interlaving
2620                  * protection PCI accesses
2621                  */
2622                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2623                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2624                 crc_ctx_pkt->u.bundling.dseg_count =
2625                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2626                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2627         }
2628
2629         /* Finish the common fields of CRC pkt */
2630         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2631         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2632         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2633         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2634
2635
2636         /* Walks data segments */
2637         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2638
2639         if (!bundling && prm->prot_seg_cnt) {
2640                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2641                         prm->tot_dsds, cmd))
2642                         goto crc_queuing_error;
2643         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2644                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2645                 goto crc_queuing_error;
2646
2647         if (bundling && prm->prot_seg_cnt) {
2648                 /* Walks dif segments */
2649                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2650
2651                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2652                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2653                         prm->prot_seg_cnt, cmd))
2654                         goto crc_queuing_error;
2655         }
2656         return QLA_SUCCESS;
2657
2658 crc_queuing_error:
2659         /* Cleanup will be performed by the caller */
2660
2661         return QLA_FUNCTION_FAILED;
2662 }
2663
2664
2665 /*
2666  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2667  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2668  */
2669 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2670         uint8_t scsi_status)
2671 {
2672         struct scsi_qla_host *vha = cmd->vha;
2673         struct qla_hw_data *ha = vha->hw;
2674         struct ctio7_to_24xx *pkt;
2675         struct qla_tgt_prm prm;
2676         uint32_t full_req_cnt = 0;
2677         unsigned long flags = 0;
2678         int res;
2679
2680         spin_lock_irqsave(&ha->hardware_lock, flags);
2681         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2682                 cmd->state = QLA_TGT_STATE_PROCESSED;
2683                 if (cmd->sess->logout_completed)
2684                         /* no need to terminate. FW already freed exchange. */
2685                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2686                 else
2687                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2688                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2689                 return 0;
2690         }
2691         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2692
2693         memset(&prm, 0, sizeof(prm));
2694         qlt_check_srr_debug(cmd, &xmit_type);
2695
2696         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2697             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2698             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2699             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2700             &cmd->se_cmd);
2701
2702         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2703             &full_req_cnt);
2704         if (unlikely(res != 0)) {
2705                 return res;
2706         }
2707
2708         spin_lock_irqsave(&ha->hardware_lock, flags);
2709
2710         if (xmit_type == QLA_TGT_XMIT_STATUS)
2711                 vha->tgt_counters.core_qla_snd_status++;
2712         else
2713                 vha->tgt_counters.core_qla_que_buf++;
2714
2715         if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2716                 /*
2717                  * Either the port is not online or this request was from
2718                  * previous life, just abort the processing.
2719                  */
2720                 cmd->state = QLA_TGT_STATE_PROCESSED;
2721                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2722                 ql_dbg(ql_dbg_async, vha, 0xe101,
2723                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2724                         vha->flags.online, qla2x00_reset_active(vha),
2725                         cmd->reset_count, ha->chip_reset);
2726                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2727                 return 0;
2728         }
2729
2730         /* Does F/W have an IOCBs for this request */
2731         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2732         if (unlikely(res))
2733                 goto out_unmap_unlock;
2734
2735         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2736                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2737         else
2738                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2739         if (unlikely(res != 0)) {
2740                 vha->req->cnt += full_req_cnt;
2741                 goto out_unmap_unlock;
2742         }
2743
2744         pkt = (struct ctio7_to_24xx *)prm.pkt;
2745
2746         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2747                 pkt->u.status0.flags |=
2748                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2749                         CTIO7_FLAGS_STATUS_MODE_0);
2750
2751                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2752                         qlt_load_data_segments(&prm, vha);
2753
2754                 if (prm.add_status_pkt == 0) {
2755                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2756                                 pkt->u.status0.scsi_status =
2757                                     cpu_to_le16(prm.rq_result);
2758                                 pkt->u.status0.residual =
2759                                     cpu_to_le32(prm.residual);
2760                                 pkt->u.status0.flags |= cpu_to_le16(
2761                                     CTIO7_FLAGS_SEND_STATUS);
2762                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2763                                         pkt->u.status0.flags |=
2764                                             cpu_to_le16(
2765                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2766                                                 CTIO7_FLAGS_CONFORM_REQ);
2767                                 }
2768                         }
2769
2770                 } else {
2771                         /*
2772                          * We have already made sure that there is sufficient
2773                          * amount of request entries to not drop HW lock in
2774                          * req_pkt().
2775                          */
2776                         struct ctio7_to_24xx *ctio =
2777                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2778
2779                         ql_dbg(ql_dbg_io, vha, 0x305e,
2780                             "Building additional status packet 0x%p.\n",
2781                             ctio);
2782
2783                         /*
2784                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2785                          * ctio7_to_24xx
2786                          */
2787                         memcpy(ctio, pkt, sizeof(*ctio));
2788                         /* reset back to CTIO7 */
2789                         ctio->entry_count = 1;
2790                         ctio->entry_type = CTIO_TYPE7;
2791                         ctio->dseg_count = 0;
2792                         ctio->u.status1.flags &= ~cpu_to_le16(
2793                             CTIO7_FLAGS_DATA_IN);
2794
2795                         /* Real finish is ctio_m1's finish */
2796                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2797                         pkt->u.status0.flags |= cpu_to_le16(
2798                             CTIO7_FLAGS_DONT_RET_CTIO);
2799
2800                         /* qlt_24xx_init_ctio_to_isp will correct
2801                          * all neccessary fields that's part of CTIO7.
2802                          * There should be no residual of CTIO-CRC2 data.
2803                          */
2804                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2805                             &prm);
2806                         pr_debug("Status CTIO7: %p\n", ctio);
2807                 }
2808         } else
2809                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2810
2811
2812         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2813         cmd->cmd_sent_to_fw = 1;
2814
2815         /* Memory Barrier */
2816         wmb();
2817         qla2x00_start_iocbs(vha, vha->req);
2818         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2819
2820         return 0;
2821
2822 out_unmap_unlock:
2823         qlt_unmap_sg(vha, cmd);
2824         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2825
2826         return res;
2827 }
2828 EXPORT_SYMBOL(qlt_xmit_response);
2829
2830 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2831 {
2832         struct ctio7_to_24xx *pkt;
2833         struct scsi_qla_host *vha = cmd->vha;
2834         struct qla_hw_data *ha = vha->hw;
2835         struct qla_tgt *tgt = cmd->tgt;
2836         struct qla_tgt_prm prm;
2837         unsigned long flags;
2838         int res = 0;
2839
2840         memset(&prm, 0, sizeof(prm));
2841         prm.cmd = cmd;
2842         prm.tgt = tgt;
2843         prm.sg = NULL;
2844         prm.req_cnt = 1;
2845
2846         /* Send marker if required */
2847         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2848                 return -EIO;
2849
2850         /* Calculate number of entries and segments required */
2851         if (qlt_pci_map_calc_cnt(&prm) != 0)
2852                 return -EAGAIN;
2853
2854         spin_lock_irqsave(&ha->hardware_lock, flags);
2855
2856         if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2857             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2858                 /*
2859                  * Either the port is not online or this request was from
2860                  * previous life, just abort the processing.
2861                  */
2862                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2863                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2864                 ql_dbg(ql_dbg_async, vha, 0xe102,
2865                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2866                         vha->flags.online, qla2x00_reset_active(vha),
2867                         cmd->reset_count, ha->chip_reset);
2868                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2869                 return 0;
2870         }
2871
2872         /* Does F/W have an IOCBs for this request */
2873         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2874         if (res != 0)
2875                 goto out_unlock_free_unmap;
2876         if (cmd->se_cmd.prot_op)
2877                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2878         else
2879                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2880
2881         if (unlikely(res != 0)) {
2882                 vha->req->cnt += prm.req_cnt;
2883                 goto out_unlock_free_unmap;
2884         }
2885
2886         pkt = (struct ctio7_to_24xx *)prm.pkt;
2887         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2888             CTIO7_FLAGS_STATUS_MODE_0);
2889
2890         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2891                 qlt_load_data_segments(&prm, vha);
2892
2893         cmd->state = QLA_TGT_STATE_NEED_DATA;
2894         cmd->cmd_sent_to_fw = 1;
2895
2896         /* Memory Barrier */
2897         wmb();
2898         qla2x00_start_iocbs(vha, vha->req);
2899         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2900
2901         return res;
2902
2903 out_unlock_free_unmap:
2904         qlt_unmap_sg(vha, cmd);
2905         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2906
2907         return res;
2908 }
2909 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2910
2911
2912 /*
2913  * Checks the guard or meta-data for the type of error
2914  * detected by the HBA.
2915  */
2916 static inline int
2917 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2918                 struct ctio_crc_from_fw *sts)
2919 {
2920         uint8_t         *ap = &sts->actual_dif[0];
2921         uint8_t         *ep = &sts->expected_dif[0];
2922         uint32_t        e_ref_tag, a_ref_tag;
2923         uint16_t        e_app_tag, a_app_tag;
2924         uint16_t        e_guard, a_guard;
2925         uint64_t        lba = cmd->se_cmd.t_task_lba;
2926
2927         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2928         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2929         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2930
2931         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2932         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2933         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2934
2935         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2936             "iocb(s) %p Returned STATUS.\n", sts);
2937
2938         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2939             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2940             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2941             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2942
2943         /*
2944          * Ignore sector if:
2945          * For type     3: ref & app tag is all 'f's
2946          * For type 0,1,2: app tag is all 'f's
2947          */
2948         if ((a_app_tag == 0xffff) &&
2949             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2950              (a_ref_tag == 0xffffffff))) {
2951                 uint32_t blocks_done;
2952
2953                 /* 2TB boundary case covered automatically with this */
2954                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2955                 cmd->se_cmd.bad_sector = e_ref_tag;
2956                 cmd->se_cmd.pi_err = 0;
2957                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2958                         "need to return scsi good\n");
2959
2960                 /* Update protection tag */
2961                 if (cmd->prot_sg_cnt) {
2962                         uint32_t i, k = 0, num_ent;
2963                         struct scatterlist *sg, *sgl;
2964
2965
2966                         sgl = cmd->prot_sg;
2967
2968                         /* Patch the corresponding protection tags */
2969                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2970                                 num_ent = sg_dma_len(sg) / 8;
2971                                 if (k + num_ent < blocks_done) {
2972                                         k += num_ent;
2973                                         continue;
2974                                 }
2975                                 k = blocks_done;
2976                                 break;
2977                         }
2978
2979                         if (k != blocks_done) {
2980                                 ql_log(ql_log_warn, vha, 0xf076,
2981                                     "unexpected tag values tag:lba=%u:%llu)\n",
2982                                     e_ref_tag, (unsigned long long)lba);
2983                                 goto out;
2984                         }
2985
2986 #if 0
2987                         struct sd_dif_tuple *spt;
2988                         /* TODO:
2989                          * This section came from initiator. Is it valid here?
2990                          * should ulp be override with actual val???
2991                          */
2992                         spt = page_address(sg_page(sg)) + sg->offset;
2993                         spt += j;
2994
2995                         spt->app_tag = 0xffff;
2996                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2997                                 spt->ref_tag = 0xffffffff;
2998 #endif
2999                 }
3000
3001                 return 0;
3002         }
3003
3004         /* check guard */
3005         if (e_guard != a_guard) {
3006                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
3007                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3008
3009                 ql_log(ql_log_warn, vha, 0xe076,
3010                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3011                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3012                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3013                     a_guard, e_guard, cmd);
3014                 goto out;
3015         }
3016
3017         /* check ref tag */
3018         if (e_ref_tag != a_ref_tag) {
3019                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3020                 cmd->se_cmd.bad_sector = e_ref_tag;
3021
3022                 ql_log(ql_log_warn, vha, 0xe077,
3023                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3024                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3025                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3026                         a_guard, e_guard, cmd);
3027                 goto out;
3028         }
3029
3030         /* check appl tag */
3031         if (e_app_tag != a_app_tag) {
3032                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3033                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3034
3035                 ql_log(ql_log_warn, vha, 0xe078,
3036                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3037                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3038                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3039                         a_guard, e_guard, cmd);
3040                 goto out;
3041         }
3042 out:
3043         return 1;
3044 }
3045
3046
3047 /* If hardware_lock held on entry, might drop it, then reaquire */
3048 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3049 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3050         struct imm_ntfy_from_isp *ntfy)
3051 {
3052         struct nack_to_isp *nack;
3053         struct qla_hw_data *ha = vha->hw;
3054         request_t *pkt;
3055         int ret = 0;
3056
3057         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3058             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3059
3060         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3061         if (pkt == NULL) {
3062                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3063                     "qla_target(%d): %s failed: unable to allocate "
3064                     "request packet\n", vha->vp_idx, __func__);
3065                 return -ENOMEM;
3066         }
3067
3068         pkt->entry_type = NOTIFY_ACK_TYPE;
3069         pkt->entry_count = 1;
3070         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3071
3072         nack = (struct nack_to_isp *)pkt;
3073         nack->ox_id = ntfy->ox_id;
3074
3075         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3076         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3077                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3078                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3079         }
3080
3081         /* terminate */
3082         nack->u.isp24.flags |=
3083                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3084
3085         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3086         nack->u.isp24.status = ntfy->u.isp24.status;
3087         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3088         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3089         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3090         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3091         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3092         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3093
3094         qla2x00_start_iocbs(vha, vha->req);
3095         return ret;
3096 }
3097
3098 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3099         struct imm_ntfy_from_isp *imm, int ha_locked)
3100 {
3101         unsigned long flags = 0;
3102         int rc;
3103
3104         if (qlt_issue_marker(vha, ha_locked) < 0)
3105                 return;
3106
3107         if (ha_locked) {
3108                 rc = __qlt_send_term_imm_notif(vha, imm);
3109
3110 #if 0   /* Todo  */
3111                 if (rc == -ENOMEM)
3112                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3113 #endif
3114                 goto done;
3115         }
3116
3117         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3118         rc = __qlt_send_term_imm_notif(vha, imm);
3119
3120 #if 0   /* Todo */
3121         if (rc == -ENOMEM)
3122                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3123 #endif
3124
3125 done:
3126         if (!ha_locked)
3127                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3128 }
3129
3130 /* If hardware_lock held on entry, might drop it, then reaquire */
3131 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3132 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3133         struct qla_tgt_cmd *cmd,
3134         struct atio_from_isp *atio)
3135 {
3136         struct ctio7_to_24xx *ctio24;
3137         struct qla_hw_data *ha = vha->hw;
3138         request_t *pkt;
3139         int ret = 0;
3140         uint16_t temp;
3141
3142         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3143
3144         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3145         if (pkt == NULL) {
3146                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3147                     "qla_target(%d): %s failed: unable to allocate "
3148                     "request packet\n", vha->vp_idx, __func__);
3149                 return -ENOMEM;
3150         }
3151
3152         if (cmd != NULL) {
3153                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3154                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3155                             "qla_target(%d): Terminating cmd %p with "
3156                             "incorrect state %d\n", vha->vp_idx, cmd,
3157                             cmd->state);
3158                 } else
3159                         ret = 1;
3160         }
3161
3162         vha->tgt_counters.num_term_xchg_sent++;
3163         pkt->entry_count = 1;
3164         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3165
3166         ctio24 = (struct ctio7_to_24xx *)pkt;
3167         ctio24->entry_type = CTIO_TYPE7;
3168         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3169         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3170         ctio24->vp_index = vha->vp_idx;
3171         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3172         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3173         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3174         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3175         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3176             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3177                 CTIO7_FLAGS_TERMINATE);
3178         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3179         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3180
3181         /* Most likely, it isn't needed */
3182         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3183             &atio->u.isp24.fcp_cmnd.add_cdb[
3184             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3185         if (ctio24->u.status1.residual != 0)
3186                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3187
3188         /* Memory Barrier */
3189         wmb();
3190         qla2x00_start_iocbs(vha, vha->req);
3191         return ret;
3192 }
3193
3194 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3195         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3196         int ul_abort)
3197 {
3198         unsigned long flags = 0;
3199         int rc;
3200
3201         if (qlt_issue_marker(vha, ha_locked) < 0)
3202                 return;
3203
3204         if (ha_locked) {
3205                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3206                 if (rc == -ENOMEM)
3207                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3208                 goto done;
3209         }
3210         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3211         rc = __qlt_send_term_exchange(vha, cmd, atio);
3212         if (rc == -ENOMEM)
3213                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3214
3215 done:
3216         if (cmd && !ul_abort && !cmd->aborted) {
3217                 if (cmd->sg_mapped)
3218                         qlt_unmap_sg(vha, cmd);
3219                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3220         }
3221
3222         if (!ha_locked)
3223                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3224
3225         return;
3226 }
3227
3228 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3229 {
3230         struct list_head free_list;
3231         struct qla_tgt_cmd *cmd, *tcmd;
3232
3233         vha->hw->tgt.leak_exchg_thresh_hold =
3234             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3235
3236         cmd = tcmd = NULL;
3237         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3238                 INIT_LIST_HEAD(&free_list);
3239                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3240
3241                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3242                         list_del(&cmd->cmd_list);
3243                         /* This cmd was never sent to TCM.  There is no need
3244                          * to schedule free or call free_cmd
3245                          */
3246                         qlt_free_cmd(cmd);
3247                         vha->hw->tgt.num_qfull_cmds_alloc--;
3248                 }
3249         }
3250         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3251 }
3252
3253 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3254 {
3255         uint32_t total_leaked;
3256
3257         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3258
3259         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3260             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3261
3262                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3263                     "Chip reset due to exchange starvation: %d/%d.\n",
3264                     total_leaked, vha->hw->cur_fw_xcb_count);
3265
3266                 if (IS_P3P_TYPE(vha->hw))
3267                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3268                 else
3269                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3270                 qla2xxx_wake_dpc(vha);
3271         }
3272
3273 }
3274
3275 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3276 {
3277         struct qla_tgt *tgt = cmd->tgt;
3278         struct scsi_qla_host *vha = tgt->vha;
3279         struct se_cmd *se_cmd = &cmd->se_cmd;
3280         unsigned long flags;
3281
3282         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3283             "qla_target(%d): terminating exchange for aborted cmd=%p "
3284             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3285             se_cmd->tag);
3286
3287         spin_lock_irqsave(&cmd->cmd_lock, flags);
3288         if (cmd->aborted) {
3289                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3290                 /*
3291                  * It's normal to see 2 calls in this path:
3292                  *  1) XFER Rdy completion + CMD_T_ABORT
3293                  *  2) TCM TMR - drain_state_list
3294                  */
3295                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3296                         "multiple abort. %p transport_state %x, t_state %x,"
3297                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3298                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3299                 return EIO;
3300         }
3301         cmd->aborted = 1;
3302         cmd->cmd_flags |= BIT_6;
3303         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3304
3305         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3306         return 0;
3307 }
3308 EXPORT_SYMBOL(qlt_abort_cmd);
3309
3310 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3311 {
3312         struct qla_tgt_sess *sess = cmd->sess;
3313
3314         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3315             "%s: se_cmd[%p] ox_id %04x\n",
3316             __func__, &cmd->se_cmd,
3317             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3318
3319         BUG_ON(cmd->cmd_in_wq);
3320
3321         if (cmd->sg_mapped)
3322                 qlt_unmap_sg(cmd->vha, cmd);
3323
3324         if (!cmd->q_full)
3325                 qlt_decr_num_pend_cmds(cmd->vha);
3326
3327         BUG_ON(cmd->sg_mapped);
3328         cmd->jiffies_at_free = get_jiffies_64();
3329         if (unlikely(cmd->free_sg))
3330                 kfree(cmd->sg);
3331
3332         if (!sess || !sess->se_sess) {
3333                 WARN_ON(1);
3334                 return;
3335         }
3336         cmd->jiffies_at_free = get_jiffies_64();
3337         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3338 }
3339 EXPORT_SYMBOL(qlt_free_cmd);
3340
3341 /* ha->hardware_lock supposed to be held on entry */
3342 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3343         struct qla_tgt_cmd *cmd, void *ctio)
3344 {
3345         struct qla_tgt_srr_ctio *sc;
3346         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3347         struct qla_tgt_srr_imm *imm;
3348
3349         tgt->ctio_srr_id++;
3350         cmd->cmd_flags |= BIT_15;
3351
3352         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3353             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3354
3355         if (!ctio) {
3356                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3357                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3358                     vha->vp_idx);
3359                 return -EINVAL;
3360         }
3361
3362         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3363         if (sc != NULL) {
3364                 sc->cmd = cmd;
3365                 /* IRQ is already OFF */
3366                 spin_lock(&tgt->srr_lock);
3367                 sc->srr_id = tgt->ctio_srr_id;
3368                 list_add_tail(&sc->srr_list_entry,
3369                     &tgt->srr_ctio_list);
3370                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3371                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3372                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3373                         int found = 0;
3374                         list_for_each_entry(imm, &tgt->srr_imm_list,
3375                             srr_list_entry) {
3376                                 if (imm->srr_id == sc->srr_id) {
3377                                         found = 1;
3378                                         break;
3379                                 }
3380                         }
3381                         if (found) {
3382                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3383                                     "Scheduling srr work\n");
3384                                 schedule_work(&tgt->srr_work);
3385                         } else {
3386                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3387                                     "qla_target(%d): imm_srr_id "
3388                                     "== ctio_srr_id (%d), but there is no "
3389                                     "corresponding SRR IMM, deleting CTIO "
3390                                     "SRR %p\n", vha->vp_idx,
3391                                     tgt->ctio_srr_id, sc);
3392                                 list_del(&sc->srr_list_entry);
3393                                 spin_unlock(&tgt->srr_lock);
3394
3395                                 kfree(sc);
3396                                 return -EINVAL;
3397                         }
3398                 }
3399                 spin_unlock(&tgt->srr_lock);
3400         } else {
3401                 struct qla_tgt_srr_imm *ti;
3402
3403                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3404                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3405                     vha->vp_idx);
3406                 spin_lock(&tgt->srr_lock);
3407                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3408                     srr_list_entry) {
3409                         if (imm->srr_id == tgt->ctio_srr_id) {
3410                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3411                                     "IMM SRR %p deleted (id %d)\n",
3412                                     imm, imm->srr_id);
3413                                 list_del(&imm->srr_list_entry);
3414                                 qlt_reject_free_srr_imm(vha, imm, 1);
3415                         }
3416                 }
3417                 spin_unlock(&tgt->srr_lock);
3418
3419                 return -ENOMEM;
3420         }
3421
3422         return 0;
3423 }
3424
3425 /*
3426  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3427  */
3428 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3429         struct qla_tgt_cmd *cmd, uint32_t status)
3430 {
3431         int term = 0;
3432
3433         if (ctio != NULL) {
3434                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3435                 term = !(c->flags &
3436                     cpu_to_le16(OF_TERM_EXCH));
3437         } else
3438                 term = 1;
3439
3440         if (term)
3441                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3442
3443         return term;
3444 }
3445
3446 /* ha->hardware_lock supposed to be held on entry */
3447 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3448         uint32_t handle)
3449 {
3450         struct qla_hw_data *ha = vha->hw;
3451
3452         handle--;
3453         if (ha->tgt.cmds[handle] != NULL) {
3454                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3455                 ha->tgt.cmds[handle] = NULL;
3456                 return cmd;
3457         } else
3458                 return NULL;
3459 }
3460
3461 /* ha->hardware_lock supposed to be held on entry */
3462 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3463         uint32_t handle, void *ctio)
3464 {
3465         struct qla_tgt_cmd *cmd = NULL;
3466
3467         /* Clear out internal marks */
3468         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3469             CTIO_INTERMEDIATE_HANDLE_MARK);
3470
3471         if (handle != QLA_TGT_NULL_HANDLE) {
3472                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3473                         return NULL;
3474
3475                 /* handle-1 is actually used */
3476                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3477                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3478                             "qla_target(%d): Wrong handle %x received\n",
3479                             vha->vp_idx, handle);
3480                         return NULL;
3481                 }
3482                 cmd = qlt_get_cmd(vha, handle);
3483                 if (unlikely(cmd == NULL)) {
3484                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3485                             "qla_target(%d): Suspicious: unable to "
3486                             "find the command with handle %x\n", vha->vp_idx,
3487                             handle);
3488                         return NULL;
3489                 }
3490         } else if (ctio != NULL) {
3491                 /* We can't get loop ID from CTIO7 */
3492                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3493                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3494                     "support NULL handles\n", vha->vp_idx);
3495                 return NULL;
3496         }
3497
3498         return cmd;
3499 }
3500
3501 /* hardware_lock should be held by caller. */
3502 static void
3503 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3504 {
3505         struct qla_hw_data *ha = vha->hw;
3506         uint32_t handle;
3507
3508         if (cmd->sg_mapped)
3509                 qlt_unmap_sg(vha, cmd);
3510
3511         handle = qlt_make_handle(vha);
3512
3513         /* TODO: fix debug message type and ids. */
3514         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3515                 ql_dbg(ql_dbg_io, vha, 0xff00,
3516                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3517         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3518                 cmd->write_data_transferred = 0;
3519                 cmd->state = QLA_TGT_STATE_DATA_IN;
3520
3521                 ql_dbg(ql_dbg_io, vha, 0xff01,
3522                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3523
3524                 ha->tgt.tgt_ops->handle_data(cmd);
3525                 return;
3526         } else {
3527                 ql_dbg(ql_dbg_io, vha, 0xff03,
3528                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3529                     cmd->state);
3530                 dump_stack();
3531         }
3532
3533         cmd->cmd_flags |= BIT_17;
3534         ha->tgt.tgt_ops->free_cmd(cmd);
3535 }
3536
3537 void
3538 qlt_host_reset_handler(struct qla_hw_data *ha)
3539 {
3540         struct qla_tgt_cmd *cmd;
3541         unsigned long flags;
3542         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3543         scsi_qla_host_t *vha = NULL;
3544         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3545         uint32_t i;
3546
3547         if (!base_vha->hw->tgt.tgt_ops)
3548                 return;
3549
3550         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3551                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3552                         "Target mode disabled\n");
3553                 return;
3554         }
3555
3556         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3557             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3558             base_vha->dpc_flags);
3559
3560         spin_lock_irqsave(&ha->hardware_lock, flags);
3561         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3562                 cmd = qlt_get_cmd(base_vha, i);
3563                 if (!cmd)
3564                         continue;
3565                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3566                 vha = cmd->vha;
3567                 qlt_abort_cmd_on_host_reset(vha, cmd);
3568         }
3569         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3570 }
3571
3572
3573 /*
3574  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3575  */
3576 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3577         uint32_t status, void *ctio)
3578 {
3579         struct qla_hw_data *ha = vha->hw;
3580         struct se_cmd *se_cmd;
3581         struct qla_tgt_cmd *cmd;
3582
3583         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3584                 /* That could happen only in case of an error/reset/abort */
3585                 if (status != CTIO_SUCCESS) {
3586                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3587                             "Intermediate CTIO received"
3588                             " (status %x)\n", status);
3589                 }
3590                 return;
3591         }
3592
3593         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3594         if (cmd == NULL)
3595                 return;
3596
3597         se_cmd = &cmd->se_cmd;
3598         cmd->cmd_sent_to_fw = 0;
3599
3600         qlt_unmap_sg(vha, cmd);
3601
3602         if (unlikely(status != CTIO_SUCCESS)) {
3603                 switch (status & 0xFFFF) {
3604                 case CTIO_LIP_RESET:
3605                 case CTIO_TARGET_RESET:
3606                 case CTIO_ABORTED:
3607                         /* driver request abort via Terminate exchange */
3608                 case CTIO_TIMEOUT:
3609                 case CTIO_INVALID_RX_ID:
3610                         /* They are OK */
3611                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3612                             "qla_target(%d): CTIO with "
3613                             "status %#x received, state %x, se_cmd %p, "
3614                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3615                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3616                             status, cmd->state, se_cmd);
3617                         break;
3618
3619                 case CTIO_PORT_LOGGED_OUT:
3620                 case CTIO_PORT_UNAVAILABLE:
3621                 {
3622                         int logged_out =
3623                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3624
3625                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3626                             "qla_target(%d): CTIO with %s status %x "
3627                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3628                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3629                             status, cmd->state, se_cmd);
3630
3631                         if (logged_out && cmd->sess) {
3632                                 /*
3633                                  * Session is already logged out, but we need
3634                                  * to notify initiator, who's not aware of this
3635                                  */
3636                                 cmd->sess->logout_on_delete = 0;
3637                                 cmd->sess->send_els_logo = 1;
3638                                 qlt_schedule_sess_for_deletion(cmd->sess, true);
3639                         }
3640                         break;
3641                 }
3642                 case CTIO_SRR_RECEIVED:
3643                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3644                             "qla_target(%d): CTIO with SRR_RECEIVED"
3645                             " status %x received (state %x, se_cmd %p)\n",
3646                             vha->vp_idx, status, cmd->state, se_cmd);
3647                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3648                                 break;
3649                         else
3650                                 return;
3651
3652                 case CTIO_DIF_ERROR: {
3653                         struct ctio_crc_from_fw *crc =
3654                                 (struct ctio_crc_from_fw *)ctio;
3655                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3656                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3657                             vha->vp_idx, status, cmd->state, se_cmd,
3658                             *((u64 *)&crc->actual_dif[0]),
3659                             *((u64 *)&crc->expected_dif[0]));
3660
3661                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3662                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3663                                         /* scsi Write/xfer rdy complete */
3664                                         goto skip_term;
3665                                 } else {
3666                                         /* scsi read/xmit respond complete
3667                                          * call handle dif to send scsi status
3668                                          * rather than terminate exchange.
3669                                          */
3670                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3671                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3672                                         return;
3673                                 }
3674                         } else {
3675                                 /* Need to generate a SCSI good completion.
3676                                  * because FW did not send scsi status.
3677                                  */
3678                                 status = 0;
3679                                 goto skip_term;
3680                         }
3681                         break;
3682                 }
3683                 default:
3684                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3685                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3686                             vha->vp_idx, status, cmd->state, se_cmd);
3687                         break;
3688                 }
3689
3690
3691                 /* "cmd->aborted" means
3692                  * cmd is already aborted/terminated, we don't
3693                  * need to terminate again.  The exchange is already
3694                  * cleaned up/freed at FW level.  Just cleanup at driver
3695                  * level.
3696                  */
3697                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3698                     (!cmd->aborted)) {
3699                         cmd->cmd_flags |= BIT_13;
3700                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3701                                 return;
3702                 }
3703         }
3704 skip_term:
3705
3706         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3707                 cmd->cmd_flags |= BIT_12;
3708         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3709                 cmd->state = QLA_TGT_STATE_DATA_IN;
3710
3711                 if (status == CTIO_SUCCESS)
3712                         cmd->write_data_transferred = 1;
3713
3714                 ha->tgt.tgt_ops->handle_data(cmd);
3715                 return;
3716         } else if (cmd->aborted) {
3717                 cmd->cmd_flags |= BIT_18;
3718                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3719                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3720         } else {
3721                 cmd->cmd_flags |= BIT_19;
3722                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3723                     "qla_target(%d): A command in state (%d) should "
3724                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3725         }
3726
3727         if (unlikely(status != CTIO_SUCCESS) &&
3728                 !cmd->aborted) {
3729                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3730                 dump_stack();
3731         }
3732
3733         ha->tgt.tgt_ops->free_cmd(cmd);
3734 }
3735
3736 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3737         uint8_t task_codes)
3738 {
3739         int fcp_task_attr;
3740
3741         switch (task_codes) {
3742         case ATIO_SIMPLE_QUEUE:
3743                 fcp_task_attr = TCM_SIMPLE_TAG;
3744                 break;
3745         case ATIO_HEAD_OF_QUEUE:
3746                 fcp_task_attr = TCM_HEAD_TAG;
3747                 break;
3748         case ATIO_ORDERED_QUEUE:
3749                 fcp_task_attr = TCM_ORDERED_TAG;
3750                 break;
3751         case ATIO_ACA_QUEUE:
3752                 fcp_task_attr = TCM_ACA_TAG;
3753                 break;
3754         case ATIO_UNTAGGED:
3755                 fcp_task_attr = TCM_SIMPLE_TAG;
3756                 break;
3757         default:
3758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3759                     "qla_target: unknown task code %x, use ORDERED instead\n",
3760                     task_codes);
3761                 fcp_task_attr = TCM_ORDERED_TAG;
3762                 break;
3763         }
3764
3765         return fcp_task_attr;
3766 }
3767
3768 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3769                                         uint8_t *);
3770 /*
3771  * Process context for I/O path into tcm_qla2xxx code
3772  */
3773 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3774 {
3775         scsi_qla_host_t *vha = cmd->vha;
3776         struct qla_hw_data *ha = vha->hw;
3777         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3778         struct qla_tgt_sess *sess = cmd->sess;
3779         struct atio_from_isp *atio = &cmd->atio;
3780         unsigned char *cdb;
3781         unsigned long flags;
3782         uint32_t data_length;
3783         int ret, fcp_task_attr, data_dir, bidi = 0;
3784
3785         cmd->cmd_in_wq = 0;
3786         cmd->cmd_flags |= BIT_1;
3787         if (tgt->tgt_stop)
3788                 goto out_term;
3789
3790         if (cmd->aborted) {
3791                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3792                     "cmd with tag %u is aborted\n",
3793                     cmd->atio.u.isp24.exchange_addr);
3794                 goto out_term;
3795         }
3796
3797         spin_lock_init(&cmd->cmd_lock);
3798         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3799         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3800         cmd->unpacked_lun = scsilun_to_int(
3801             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3802
3803         if (atio->u.isp24.fcp_cmnd.rddata &&
3804             atio->u.isp24.fcp_cmnd.wrdata) {
3805                 bidi = 1;
3806                 data_dir = DMA_TO_DEVICE;
3807         } else if (atio->u.isp24.fcp_cmnd.rddata)
3808                 data_dir = DMA_FROM_DEVICE;
3809         else if (atio->u.isp24.fcp_cmnd.wrdata)
3810                 data_dir = DMA_TO_DEVICE;
3811         else
3812                 data_dir = DMA_NONE;
3813
3814         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3815             atio->u.isp24.fcp_cmnd.task_attr);
3816         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3817             &atio->u.isp24.fcp_cmnd.add_cdb[
3818             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3819
3820         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3821                                           fcp_task_attr, data_dir, bidi);
3822         if (ret != 0)
3823                 goto out_term;
3824         /*
3825          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3826          */
3827         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3828         qlt_put_sess(sess);
3829         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3830         return;
3831
3832 out_term:
3833         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3834         /*
3835          * cmd has not sent to target yet, so pass NULL as the second
3836          * argument to qlt_send_term_exchange() and free the memory here.
3837          */
3838         cmd->cmd_flags |= BIT_2;
3839         spin_lock_irqsave(&ha->hardware_lock, flags);
3840         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3841
3842         qlt_decr_num_pend_cmds(vha);
3843         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3844         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3845
3846         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3847         qlt_put_sess(sess);
3848         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3849 }
3850
3851 static void qlt_do_work(struct work_struct *work)
3852 {
3853         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3854         scsi_qla_host_t *vha = cmd->vha;
3855         unsigned long flags;
3856
3857         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3858         list_del(&cmd->cmd_list);
3859         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3860
3861         __qlt_do_work(cmd);
3862 }
3863
3864 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3865                                        struct qla_tgt_sess *sess,
3866                                        struct atio_from_isp *atio)
3867 {
3868         struct se_session *se_sess = sess->se_sess;
3869         struct qla_tgt_cmd *cmd;
3870         int tag;
3871
3872         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3873         if (tag < 0)
3874                 return NULL;
3875
3876         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3877         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3878
3879         memcpy(&cmd->atio, atio, sizeof(*atio));
3880         cmd->state = QLA_TGT_STATE_NEW;
3881         cmd->tgt = vha->vha_tgt.qla_tgt;
3882         qlt_incr_num_pend_cmds(vha);
3883         cmd->vha = vha;
3884         cmd->se_cmd.map_tag = tag;
3885         cmd->sess = sess;
3886         cmd->loop_id = sess->loop_id;
3887         cmd->conf_compl_supported = sess->conf_compl_supported;
3888
3889         cmd->cmd_flags = 0;
3890         cmd->jiffies_at_alloc = get_jiffies_64();
3891
3892         cmd->reset_count = vha->hw->chip_reset;
3893
3894         return cmd;
3895 }
3896
3897 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3898                           uint16_t);
3899
3900 static void qlt_create_sess_from_atio(struct work_struct *work)
3901 {
3902         struct qla_tgt_sess_op *op = container_of(work,
3903                                         struct qla_tgt_sess_op, work);
3904         scsi_qla_host_t *vha = op->vha;
3905         struct qla_hw_data *ha = vha->hw;
3906         struct qla_tgt_sess *sess;
3907         struct qla_tgt_cmd *cmd;
3908         unsigned long flags;
3909         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3910
3911         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3912         list_del(&op->cmd_list);
3913         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3914
3915         if (op->aborted) {
3916                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3917                     "sess_op with tag %u is aborted\n",
3918                     op->atio.u.isp24.exchange_addr);
3919                 goto out_term;
3920         }
3921
3922         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3923             "qla_target(%d): Unable to find wwn login"
3924             " (s_id %x:%x:%x), trying to create it manually\n",
3925             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3926
3927         if (op->atio.u.raw.entry_count > 1) {
3928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3929                     "Dropping multy entry atio %p\n", &op->atio);
3930                 goto out_term;
3931         }
3932
3933         sess = qlt_make_local_sess(vha, s_id);
3934         /* sess has an extra creation ref. */
3935
3936         if (!sess)
3937                 goto out_term;
3938         /*
3939          * Now obtain a pre-allocated session tag using the original op->atio
3940          * packet header, and dispatch into __qlt_do_work() using the existing
3941          * process context.
3942          */
3943         cmd = qlt_get_tag(vha, sess, &op->atio);
3944         if (!cmd) {
3945                 spin_lock_irqsave(&ha->hardware_lock, flags);
3946                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3947                 qlt_put_sess(sess);
3948                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3949                 kfree(op);
3950                 return;
3951         }
3952         /*
3953          * __qlt_do_work() will call qlt_put_sess() to release
3954          * the extra reference taken above by qlt_make_local_sess()
3955          */
3956         __qlt_do_work(cmd);
3957         kfree(op);
3958         return;
3959
3960 out_term:
3961         spin_lock_irqsave(&ha->hardware_lock, flags);
3962         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3963         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3964         kfree(op);
3965
3966 }
3967
3968 /* ha->hardware_lock supposed to be held on entry */
3969 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3970         struct atio_from_isp *atio)
3971 {
3972         struct qla_hw_data *ha = vha->hw;
3973         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3974         struct qla_tgt_sess *sess;
3975         struct qla_tgt_cmd *cmd;
3976
3977         if (unlikely(tgt->tgt_stop)) {
3978                 ql_dbg(ql_dbg_io, vha, 0x3061,
3979                     "New command while device %p is shutting down\n", tgt);
3980                 return -EFAULT;
3981         }
3982
3983         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3984         if (unlikely(!sess)) {
3985                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3986                                                      GFP_ATOMIC);
3987                 if (!op)
3988                         return -ENOMEM;
3989
3990                 memcpy(&op->atio, atio, sizeof(*atio));
3991                 op->vha = vha;
3992
3993                 spin_lock(&vha->cmd_list_lock);
3994                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3995                 spin_unlock(&vha->cmd_list_lock);
3996
3997                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3998                 queue_work(qla_tgt_wq, &op->work);
3999                 return 0;
4000         }
4001
4002         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4003          * session deletion, but it's still in sess_del_work wq */
4004         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
4005                 ql_dbg(ql_dbg_io, vha, 0x3061,
4006                     "New command while old session %p is being deleted\n",
4007                     sess);
4008                 return -EFAULT;
4009         }
4010
4011         /*
4012          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4013          */
4014         kref_get(&sess->sess_kref);
4015
4016         cmd = qlt_get_tag(vha, sess, atio);
4017         if (!cmd) {
4018                 ql_dbg(ql_dbg_io, vha, 0x3062,
4019                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4020                 qlt_put_sess(sess);
4021                 return -ENOMEM;
4022         }
4023
4024         cmd->cmd_in_wq = 1;
4025         cmd->cmd_flags |= BIT_0;
4026         cmd->se_cmd.cpuid = ha->msix_count ?
4027                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4028
4029         spin_lock(&vha->cmd_list_lock);
4030         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4031         spin_unlock(&vha->cmd_list_lock);
4032
4033         INIT_WORK(&cmd->work, qlt_do_work);
4034         if (ha->msix_count) {
4035                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4036                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4037                             &cmd->work);
4038                 else
4039                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4040                             &cmd->work);
4041         } else {
4042                 queue_work(qla_tgt_wq, &cmd->work);
4043         }
4044         return 0;
4045
4046 }
4047
4048 /* ha->hardware_lock supposed to be held on entry */
4049 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
4050         int fn, void *iocb, int flags)
4051 {
4052         struct scsi_qla_host *vha = sess->vha;
4053         struct qla_hw_data *ha = vha->hw;
4054         struct qla_tgt_mgmt_cmd *mcmd;
4055         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4056         int res;
4057         uint8_t tmr_func;
4058
4059         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4060         if (!mcmd) {
4061                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4062                     "qla_target(%d): Allocation of management "
4063                     "command failed, some commands and their data could "
4064                     "leak\n", vha->vp_idx);
4065                 return -ENOMEM;
4066         }
4067         memset(mcmd, 0, sizeof(*mcmd));
4068         mcmd->sess = sess;
4069
4070         if (iocb) {
4071                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4072                     sizeof(mcmd->orig_iocb.imm_ntfy));
4073         }
4074         mcmd->tmr_func = fn;
4075         mcmd->flags = flags;
4076         mcmd->reset_count = vha->hw->chip_reset;
4077
4078         switch (fn) {
4079         case QLA_TGT_CLEAR_ACA:
4080                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
4081                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
4082                 tmr_func = TMR_CLEAR_ACA;
4083                 break;
4084
4085         case QLA_TGT_TARGET_RESET:
4086                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
4087                     "qla_target(%d): TARGET_RESET received\n",
4088                     sess->vha->vp_idx);
4089                 tmr_func = TMR_TARGET_WARM_RESET;
4090                 break;
4091
4092         case QLA_TGT_LUN_RESET:
4093                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
4094                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
4095                 tmr_func = TMR_LUN_RESET;
4096                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4097                 break;
4098
4099         case QLA_TGT_CLEAR_TS:
4100                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
4101                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
4102                 tmr_func = TMR_CLEAR_TASK_SET;
4103                 break;
4104
4105         case QLA_TGT_ABORT_TS:
4106                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
4107                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
4108                 tmr_func = TMR_ABORT_TASK_SET;
4109                 break;
4110 #if 0
4111         case QLA_TGT_ABORT_ALL:
4112                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
4113                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
4114                     sess->vha->vp_idx);
4115                 tmr_func = 0;
4116                 break;
4117
4118         case QLA_TGT_ABORT_ALL_SESS:
4119                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
4120                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
4121                     sess->vha->vp_idx);
4122                 tmr_func = 0;
4123                 break;
4124
4125         case QLA_TGT_NEXUS_LOSS_SESS:
4126                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
4127                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
4128                     sess->vha->vp_idx);
4129                 tmr_func = 0;
4130                 break;
4131
4132         case QLA_TGT_NEXUS_LOSS:
4133                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
4134                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
4135                 tmr_func = 0;
4136                 break;
4137 #endif
4138         default:
4139                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
4140                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
4141                     sess->vha->vp_idx, fn);
4142                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4143                 return -ENOSYS;
4144         }
4145
4146         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
4147         if (res != 0) {
4148                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4149                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4150                     sess->vha->vp_idx, res);
4151                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4152                 return -EFAULT;
4153         }
4154
4155         return 0;
4156 }
4157
4158 /* ha->hardware_lock supposed to be held on entry */
4159 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4160 {
4161         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4162         struct qla_hw_data *ha = vha->hw;
4163         struct qla_tgt *tgt;
4164         struct qla_tgt_sess *sess;
4165         uint32_t lun, unpacked_lun;
4166         int fn;
4167         unsigned long flags;
4168
4169         tgt = vha->vha_tgt.qla_tgt;
4170
4171         lun = a->u.isp24.fcp_cmnd.lun;
4172         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4173
4174         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4175         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4176             a->u.isp24.fcp_hdr.s_id);
4177         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4178
4179         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4180
4181         if (!sess) {
4182                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4183                     "qla_target(%d): task mgmt fn 0x%x for "
4184                     "non-existant session\n", vha->vp_idx, fn);
4185                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4186                     sizeof(struct atio_from_isp));
4187         }
4188
4189         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
4190                 return -EFAULT;
4191
4192         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4193 }
4194
4195 /* ha->hardware_lock supposed to be held on entry */
4196 static int __qlt_abort_task(struct scsi_qla_host *vha,
4197         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
4198 {
4199         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4200         struct qla_hw_data *ha = vha->hw;
4201         struct qla_tgt_mgmt_cmd *mcmd;
4202         uint32_t lun, unpacked_lun;
4203         int rc;
4204
4205         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4206         if (mcmd == NULL) {
4207                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4208                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4209                     vha->vp_idx, __func__);
4210                 return -ENOMEM;
4211         }
4212         memset(mcmd, 0, sizeof(*mcmd));
4213
4214         mcmd->sess = sess;
4215         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4216             sizeof(mcmd->orig_iocb.imm_ntfy));
4217
4218         lun = a->u.isp24.fcp_cmnd.lun;
4219         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4220         mcmd->reset_count = vha->hw->chip_reset;
4221
4222         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
4223             le16_to_cpu(iocb->u.isp2x.seq_id));
4224         if (rc != 0) {
4225                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4226                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4227                     vha->vp_idx, rc);
4228                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4229                 return -EFAULT;
4230         }
4231
4232         return 0;
4233 }
4234
4235 /* ha->hardware_lock supposed to be held on entry */
4236 static int qlt_abort_task(struct scsi_qla_host *vha,
4237         struct imm_ntfy_from_isp *iocb)
4238 {
4239         struct qla_hw_data *ha = vha->hw;
4240         struct qla_tgt_sess *sess;
4241         int loop_id;
4242         unsigned long flags;
4243
4244         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4245
4246         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4247         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4248         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4249
4250         if (sess == NULL) {
4251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4252                     "qla_target(%d): task abort for unexisting "
4253                     "session\n", vha->vp_idx);
4254                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4255                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4256         }
4257
4258         return __qlt_abort_task(vha, iocb, sess);
4259 }
4260
4261 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4262 {
4263         if (fcport->tgt_session) {
4264                 if (rc != MBS_COMMAND_COMPLETE) {
4265                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4266                                 "%s: se_sess %p / sess %p from"
4267                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4268                                 " LOGO failed: %#x\n",
4269                                 __func__,
4270                                 fcport->tgt_session->se_sess,
4271                                 fcport->tgt_session,
4272                                 fcport->port_name, fcport->loop_id,
4273                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4274                                 fcport->d_id.b.al_pa, rc);
4275                 }
4276
4277                 fcport->tgt_session->logout_completed = 1;
4278         }
4279 }
4280
4281 /*
4282 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4283 *
4284 * Schedules sessions with matching port_id/loop_id but different wwn for
4285 * deletion. Returns existing session with matching wwn if present.
4286 * Null otherwise.
4287 */
4288 static struct qla_tgt_sess *
4289 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4290     port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4291 {
4292         struct qla_tgt_sess *sess = NULL, *other_sess;
4293         uint64_t other_wwn;
4294
4295         *conflict_sess = NULL;
4296
4297         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4298
4299                 other_wwn = wwn_to_u64(other_sess->port_name);
4300
4301                 if (wwn == other_wwn) {
4302                         WARN_ON(sess);
4303                         sess = other_sess;
4304                         continue;
4305                 }
4306
4307                 /* find other sess with nport_id collision */
4308                 if (port_id.b24 == other_sess->s_id.b24) {
4309                         if (loop_id != other_sess->loop_id) {
4310                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4311                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4312                                     other_sess, other_sess->loop_id, other_wwn);
4313
4314                                 /*
4315                                  * logout_on_delete is set by default, but another
4316                                  * session that has the same s_id/loop_id combo
4317                                  * might have cleared it when requested this session
4318                                  * deletion, so don't touch it
4319                                  */
4320                                 qlt_schedule_sess_for_deletion(other_sess, true);
4321                         } else {
4322                                 /*
4323                                  * Another wwn used to have our s_id/loop_id
4324                                  * kill the session, but don't free the loop_id
4325                                  */
4326                                 other_sess->keep_nport_handle = 1;
4327                                 *conflict_sess = other_sess;
4328                                 qlt_schedule_sess_for_deletion(other_sess,
4329                                     true);
4330                         }
4331                         continue;
4332                 }
4333
4334                 /* find other sess with nport handle collision */
4335                 if (loop_id == other_sess->loop_id) {
4336                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4337                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4338                                other_sess, other_sess->loop_id, other_wwn);
4339
4340                         /* Same loop_id but different s_id
4341                          * Ok to kill and logout */
4342                         qlt_schedule_sess_for_deletion(other_sess, true);
4343                 }
4344         }
4345
4346         return sess;
4347 }
4348
4349 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4350 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4351 {
4352         struct qla_tgt_sess_op *op;
4353         struct qla_tgt_cmd *cmd;
4354         uint32_t key;
4355         int count = 0;
4356
4357         key = (((u32)s_id->b.domain << 16) |
4358                ((u32)s_id->b.area   <<  8) |
4359                ((u32)s_id->b.al_pa));
4360
4361         spin_lock(&vha->cmd_list_lock);
4362         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4363                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4364                 if (op_key == key) {
4365                         op->aborted = true;
4366                         count++;
4367                 }
4368         }
4369         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4370                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4371                 if (cmd_key == key) {
4372                         cmd->aborted = 1;
4373                         count++;
4374                 }
4375         }
4376         spin_unlock(&vha->cmd_list_lock);
4377
4378         return count;
4379 }
4380
4381 /*
4382  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4383  */
4384 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4385         struct imm_ntfy_from_isp *iocb)
4386 {
4387         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4388         struct qla_hw_data *ha = vha->hw;
4389         struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4390         uint64_t wwn;
4391         port_id_t port_id;
4392         uint16_t loop_id;
4393         uint16_t wd3_lo;
4394         int res = 0;
4395         qlt_plogi_ack_t *pla;
4396         unsigned long flags;
4397
4398         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4399
4400         port_id.b.domain = iocb->u.isp24.port_id[2];
4401         port_id.b.area   = iocb->u.isp24.port_id[1];
4402         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4403         port_id.b.rsvd_1 = 0;
4404
4405         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4406
4407         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4408             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4409             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4410
4411         /* res = 1 means ack at the end of thread
4412          * res = 0 means ack async/later.
4413          */
4414         switch (iocb->u.isp24.status_subcode) {
4415         case ELS_PLOGI:
4416
4417                 /* Mark all stale commands in qla_tgt_wq for deletion */
4418                 abort_cmds_for_s_id(vha, &port_id);
4419
4420                 if (wwn) {
4421                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4422                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4423                             port_id, loop_id, &conflict_sess);
4424                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4425                 }
4426
4427                 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4428                         res = 1;
4429                         break;
4430                 }
4431
4432                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4433                 if (!pla) {
4434                         qlt_send_term_imm_notif(vha, iocb, 1);
4435
4436                         res = 0;
4437                         break;
4438                 }
4439
4440                 res = 0;
4441
4442                 if (conflict_sess)
4443                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4444                             QLT_PLOGI_LINK_CONFLICT);
4445
4446                 if (!sess)
4447                         break;
4448
4449                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4450                  /*
4451                   * Under normal circumstances we want to release nport handle
4452                   * during LOGO process to avoid nport handle leaks inside FW.
4453                   * The exception is when LOGO is done while another PLOGI with
4454                   * the same nport handle is waiting as might be the case here.
4455                   * Note: there is always a possibily of a race where session
4456                   * deletion has already started for other reasons (e.g. ACL
4457                   * removal) and now PLOGI arrives:
4458                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4459                   *    FW must have assigned this PLOGI a new/same handle and we
4460                   *    can proceed ACK'ing it as usual when session deletion
4461                   *    completes.
4462                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4463                   *    bit reached it, the handle has now been released. We'll
4464                   *    get an error when we ACK this PLOGI. Nothing will be sent
4465                   *    back to initiator. Initiator should eventually retry
4466                   *    PLOGI and situation will correct itself.
4467                   */
4468                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4469                                            (sess->s_id.b24 == port_id.b24));
4470                 qlt_schedule_sess_for_deletion(sess, true);
4471                 break;
4472
4473         case ELS_PRLI:
4474                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4475
4476                 if (wwn) {
4477                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4478                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4479                             loop_id, &conflict_sess);
4480                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4481                 }
4482
4483                 if (conflict_sess) {
4484                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4485                             "PRLI with conflicting sess %p port %8phC\n",
4486                             conflict_sess, conflict_sess->port_name);
4487                         qlt_send_term_imm_notif(vha, iocb, 1);
4488                         res = 0;
4489                         break;
4490                 }
4491
4492                 if (sess != NULL) {
4493                         if (sess->deleted) {
4494                                 /*
4495                                  * Impatient initiator sent PRLI before last
4496                                  * PLOGI could finish. Will force him to re-try,
4497                                  * while last one finishes.
4498                                  */
4499                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4500                                     "sess %p PRLI received, before plogi ack.\n",
4501                                     sess);
4502                                 qlt_send_term_imm_notif(vha, iocb, 1);
4503                                 res = 0;
4504                                 break;
4505                         }
4506
4507                         /*
4508                          * This shouldn't happen under normal circumstances,
4509                          * since we have deleted the old session during PLOGI
4510                          */
4511                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4512                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4513                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4514
4515                         sess->local = 0;
4516                         sess->loop_id = loop_id;
4517                         sess->s_id = port_id;
4518
4519                         if (wd3_lo & BIT_7)
4520                                 sess->conf_compl_supported = 1;
4521
4522                 }
4523                 res = 1; /* send notify ack */
4524
4525                 /* Make session global (not used in fabric mode) */
4526                 if (ha->current_topology != ISP_CFG_F) {
4527                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4528                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4529                         qla2xxx_wake_dpc(vha);
4530                 } else {
4531                         /* todo: else - create sess here. */
4532                         res = 1; /* send notify ack */
4533                 }
4534
4535                 break;
4536
4537         case ELS_LOGO:
4538         case ELS_PRLO:
4539                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4540                 break;
4541         case ELS_PDISC:
4542         case ELS_ADISC:
4543         {
4544                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4545                 if (tgt->link_reinit_iocb_pending) {
4546                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4547                             0, 0, 0, 0, 0, 0);
4548                         tgt->link_reinit_iocb_pending = 0;
4549                 }
4550                 res = 1; /* send notify ack */
4551                 break;
4552         }
4553
4554         case ELS_FLOGI: /* should never happen */
4555         default:
4556                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4557                     "qla_target(%d): Unsupported ELS command %x "
4558                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4559                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4560                 break;
4561         }
4562
4563         return res;
4564 }
4565
4566 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4567 {
4568 #if 1
4569         /*
4570          * FIXME: Reject non zero SRR relative offset until we can test
4571          * this code properly.
4572          */
4573         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4574         return -1;
4575 #else
4576         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4577         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4578         int i, sg_srr_cnt, bufflen = 0;
4579
4580         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4581             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4582             "cmd->sg_cnt: %u, direction: %d\n",
4583             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4584
4585         if (!cmd->sg || !cmd->sg_cnt) {
4586                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4587                     "Missing cmd->sg or zero cmd->sg_cnt in"
4588                     " qla_tgt_set_data_offset\n");
4589                 return -EINVAL;
4590         }
4591         /*
4592          * Walk the current cmd->sg list until we locate the new sg_srr_start
4593          */
4594         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4595                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4596                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4597                     i, sg, sg_page(sg), sg->length, sg->offset);
4598
4599                 if ((sg->length + tmp) > offset) {
4600                         first_offset = rem_offset;
4601                         sg_srr_start = sg;
4602                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4603                             "Found matching sg[%d], using %p as sg_srr_start, "
4604                             "and using first_offset: %zu\n", i, sg,
4605                             first_offset);
4606                         break;
4607                 }
4608                 tmp += sg->length;
4609                 rem_offset -= sg->length;
4610         }
4611
4612         if (!sg_srr_start) {
4613                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4614                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4615                 return -EINVAL;
4616         }
4617         sg_srr_cnt = (cmd->sg_cnt - i);
4618
4619         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4620         if (!sg_srr) {
4621                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4622                     "Unable to allocate sgp\n");
4623                 return -ENOMEM;
4624         }
4625         sg_init_table(sg_srr, sg_srr_cnt);
4626         sgp = &sg_srr[0];
4627         /*
4628          * Walk the remaining list for sg_srr_start, mapping to the newly
4629          * allocated sg_srr taking first_offset into account.
4630          */
4631         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4632                 if (first_offset) {
4633                         sg_set_page(sgp, sg_page(sg),
4634                             (sg->length - first_offset), first_offset);
4635                         first_offset = 0;
4636                 } else {
4637                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4638                 }
4639                 bufflen += sgp->length;
4640
4641                 sgp = sg_next(sgp);
4642                 if (!sgp)
4643                         break;
4644         }
4645
4646         cmd->sg = sg_srr;
4647         cmd->sg_cnt = sg_srr_cnt;
4648         cmd->bufflen = bufflen;
4649         cmd->offset += offset;
4650         cmd->free_sg = 1;
4651
4652         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4653         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4654             cmd->sg_cnt);
4655         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4656             cmd->bufflen);
4657         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4658             cmd->offset);
4659
4660         if (cmd->sg_cnt < 0)
4661                 BUG();
4662
4663         if (cmd->bufflen < 0)
4664                 BUG();
4665
4666         return 0;
4667 #endif
4668 }
4669
4670 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4671         uint32_t srr_rel_offs, int *xmit_type)
4672 {
4673         int res = 0, rel_offs;
4674
4675         rel_offs = srr_rel_offs - cmd->offset;
4676         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4677             srr_rel_offs, rel_offs);
4678
4679         *xmit_type = QLA_TGT_XMIT_ALL;
4680
4681         if (rel_offs < 0) {
4682                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4683                     "qla_target(%d): SRR rel_offs (%d) < 0",
4684                     cmd->vha->vp_idx, rel_offs);
4685                 res = -1;
4686         } else if (rel_offs == cmd->bufflen)
4687                 *xmit_type = QLA_TGT_XMIT_STATUS;
4688         else if (rel_offs > 0)
4689                 res = qlt_set_data_offset(cmd, rel_offs);
4690
4691         return res;
4692 }
4693
4694 /* No locks, thread context */
4695 static void qlt_handle_srr(struct scsi_qla_host *vha,
4696         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4697 {
4698         struct imm_ntfy_from_isp *ntfy =
4699             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4700         struct qla_hw_data *ha = vha->hw;
4701         struct qla_tgt_cmd *cmd = sctio->cmd;
4702         struct se_cmd *se_cmd = &cmd->se_cmd;
4703         unsigned long flags;
4704         int xmit_type = 0, resp = 0;
4705         uint32_t offset;
4706         uint16_t srr_ui;
4707
4708         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4709         srr_ui = ntfy->u.isp24.srr_ui;
4710
4711         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4712             cmd, srr_ui);
4713
4714         switch (srr_ui) {
4715         case SRR_IU_STATUS:
4716                 spin_lock_irqsave(&ha->hardware_lock, flags);
4717                 qlt_send_notify_ack(vha, ntfy,
4718                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4719                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4720                 xmit_type = QLA_TGT_XMIT_STATUS;
4721                 resp = 1;
4722                 break;
4723         case SRR_IU_DATA_IN:
4724                 if (!cmd->sg || !cmd->sg_cnt) {
4725                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4726                             "Unable to process SRR_IU_DATA_IN due to"
4727                             " missing cmd->sg, state: %d\n", cmd->state);
4728                         dump_stack();
4729                         goto out_reject;
4730                 }
4731                 if (se_cmd->scsi_status != 0) {
4732                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4733                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4734                             "scsi_status\n");
4735                         goto out_reject;
4736                 }
4737                 cmd->bufflen = se_cmd->data_length;
4738
4739                 if (qlt_has_data(cmd)) {
4740                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4741                                 goto out_reject;
4742                         spin_lock_irqsave(&ha->hardware_lock, flags);
4743                         qlt_send_notify_ack(vha, ntfy,
4744                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4745                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4746                         resp = 1;
4747                 } else {
4748                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4749                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4750                                vha->vp_idx, se_cmd->tag,
4751                             cmd->se_cmd.scsi_status);
4752                         goto out_reject;
4753                 }
4754                 break;
4755         case SRR_IU_DATA_OUT:
4756                 if (!cmd->sg || !cmd->sg_cnt) {
4757                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4758                             "Unable to process SRR_IU_DATA_OUT due to"
4759                             " missing cmd->sg\n");
4760                         dump_stack();
4761                         goto out_reject;
4762                 }
4763                 if (se_cmd->scsi_status != 0) {
4764                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4765                             "Rejecting SRR_IU_DATA_OUT"
4766                             " with non GOOD scsi_status\n");
4767                         goto out_reject;
4768                 }
4769                 cmd->bufflen = se_cmd->data_length;
4770
4771                 if (qlt_has_data(cmd)) {
4772                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4773                                 goto out_reject;
4774                         spin_lock_irqsave(&ha->hardware_lock, flags);
4775                         qlt_send_notify_ack(vha, ntfy,
4776                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4777                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4778                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4779                                 cmd->cmd_flags |= BIT_8;
4780                                 qlt_rdy_to_xfer(cmd);
4781                         }
4782                 } else {
4783                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4784                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4785                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4786                         goto out_reject;
4787                 }
4788                 break;
4789         default:
4790                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4791                     "qla_target(%d): Unknown srr_ui value %x",
4792                     vha->vp_idx, srr_ui);
4793                 goto out_reject;
4794         }
4795
4796         /* Transmit response in case of status and data-in cases */
4797         if (resp) {
4798                 cmd->cmd_flags |= BIT_7;
4799                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4800         }
4801
4802         return;
4803
4804 out_reject:
4805         spin_lock_irqsave(&ha->hardware_lock, flags);
4806         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4807             NOTIFY_ACK_SRR_FLAGS_REJECT,
4808             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4809             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4810         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4811                 cmd->state = QLA_TGT_STATE_DATA_IN;
4812                 dump_stack();
4813         } else {
4814                 cmd->cmd_flags |= BIT_9;
4815                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4816         }
4817         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4818 }
4819
4820 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4821         struct qla_tgt_srr_imm *imm, int ha_locked)
4822 {
4823         struct qla_hw_data *ha = vha->hw;
4824         unsigned long flags = 0;
4825
4826 #ifndef __CHECKER__
4827         if (!ha_locked)
4828                 spin_lock_irqsave(&ha->hardware_lock, flags);
4829 #endif
4830
4831         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4832             NOTIFY_ACK_SRR_FLAGS_REJECT,
4833             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4834             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4835
4836 #ifndef __CHECKER__
4837         if (!ha_locked)
4838                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4839 #endif
4840
4841         kfree(imm);
4842 }
4843
4844 static void qlt_handle_srr_work(struct work_struct *work)
4845 {
4846         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4847         struct scsi_qla_host *vha = tgt->vha;
4848         struct qla_tgt_srr_ctio *sctio;
4849         unsigned long flags;
4850
4851         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4852             tgt);
4853
4854 restart:
4855         spin_lock_irqsave(&tgt->srr_lock, flags);
4856         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4857                 struct qla_tgt_srr_imm *imm, *i, *ti;
4858                 struct qla_tgt_cmd *cmd;
4859                 struct se_cmd *se_cmd;
4860
4861                 imm = NULL;
4862                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4863                                                 srr_list_entry) {
4864                         if (i->srr_id == sctio->srr_id) {
4865                                 list_del(&i->srr_list_entry);
4866                                 if (imm) {
4867                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4868                                           "qla_target(%d): There must be "
4869                                           "only one IMM SRR per CTIO SRR "
4870                                           "(IMM SRR %p, id %d, CTIO %p\n",
4871                                           vha->vp_idx, i, i->srr_id, sctio);
4872                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4873                                 } else
4874                                         imm = i;
4875                         }
4876                 }
4877
4878                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4879                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4880                     sctio->srr_id);
4881
4882                 if (imm == NULL) {
4883                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4884                             "Not found matching IMM for SRR CTIO (id %d)\n",
4885                             sctio->srr_id);
4886                         continue;
4887                 } else
4888                         list_del(&sctio->srr_list_entry);
4889
4890                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4891
4892                 cmd = sctio->cmd;
4893                 /*
4894                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4895                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4896                  * logic..
4897                  */
4898                 cmd->offset = 0;
4899                 if (cmd->free_sg) {
4900                         kfree(cmd->sg);
4901                         cmd->sg = NULL;
4902                         cmd->free_sg = 0;
4903                 }
4904                 se_cmd = &cmd->se_cmd;
4905
4906                 cmd->sg_cnt = se_cmd->t_data_nents;
4907                 cmd->sg = se_cmd->t_data_sg;
4908
4909                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4910                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4911                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4912                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4913
4914                 qlt_handle_srr(vha, sctio, imm);
4915
4916                 kfree(imm);
4917                 kfree(sctio);
4918                 goto restart;
4919         }
4920         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4921 }
4922
4923 /* ha->hardware_lock supposed to be held on entry */
4924 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4925         struct imm_ntfy_from_isp *iocb)
4926 {
4927         struct qla_tgt_srr_imm *imm;
4928         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4929         struct qla_tgt_srr_ctio *sctio;
4930
4931         tgt->imm_srr_id++;
4932
4933         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4934             vha->vp_idx);
4935
4936         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4937         if (imm != NULL) {
4938                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4939
4940                 /* IRQ is already OFF */
4941                 spin_lock(&tgt->srr_lock);
4942                 imm->srr_id = tgt->imm_srr_id;
4943                 list_add_tail(&imm->srr_list_entry,
4944                     &tgt->srr_imm_list);
4945                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4946                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4947                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4948                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4949                         int found = 0;
4950                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4951                             srr_list_entry) {
4952                                 if (sctio->srr_id == imm->srr_id) {
4953                                         found = 1;
4954                                         break;
4955                                 }
4956                         }
4957                         if (found) {
4958                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4959                                     "Scheduling srr work\n");
4960                                 schedule_work(&tgt->srr_work);
4961                         } else {
4962                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4963                                     "qla_target(%d): imm_srr_id "
4964                                     "== ctio_srr_id (%d), but there is no "
4965                                     "corresponding SRR CTIO, deleting IMM "
4966                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4967                                     imm);
4968                                 list_del(&imm->srr_list_entry);
4969
4970                                 kfree(imm);
4971
4972                                 spin_unlock(&tgt->srr_lock);
4973                                 goto out_reject;
4974                         }
4975                 }
4976                 spin_unlock(&tgt->srr_lock);
4977         } else {
4978                 struct qla_tgt_srr_ctio *ts;
4979
4980                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4981                     "qla_target(%d): Unable to allocate SRR IMM "
4982                     "entry, SRR request will be rejected\n", vha->vp_idx);
4983
4984                 /* IRQ is already OFF */
4985                 spin_lock(&tgt->srr_lock);
4986                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4987                     srr_list_entry) {
4988                         if (sctio->srr_id == tgt->imm_srr_id) {
4989                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4990                                     "CTIO SRR %p deleted (id %d)\n",
4991                                     sctio, sctio->srr_id);
4992                                 list_del(&sctio->srr_list_entry);
4993                                 qlt_send_term_exchange(vha, sctio->cmd,
4994                                     &sctio->cmd->atio, 1, 0);
4995                                 kfree(sctio);
4996                         }
4997                 }
4998                 spin_unlock(&tgt->srr_lock);
4999                 goto out_reject;
5000         }
5001
5002         return;
5003
5004 out_reject:
5005         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
5006             NOTIFY_ACK_SRR_FLAGS_REJECT,
5007             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
5008             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
5009 }
5010
5011 /*
5012  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5013  */
5014 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5015         struct imm_ntfy_from_isp *iocb)
5016 {
5017         struct qla_hw_data *ha = vha->hw;
5018         uint32_t add_flags = 0;
5019         int send_notify_ack = 1;
5020         uint16_t status;
5021
5022         status = le16_to_cpu(iocb->u.isp2x.status);
5023         switch (status) {
5024         case IMM_NTFY_LIP_RESET:
5025         {
5026                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5027                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5028                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5029                     iocb->u.isp24.status_subcode);
5030
5031                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5032                         send_notify_ack = 0;
5033                 break;
5034         }
5035
5036         case IMM_NTFY_LIP_LINK_REINIT:
5037         {
5038                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5039                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5040                     "qla_target(%d): LINK REINIT (loop %#x, "
5041                     "subcode %x)\n", vha->vp_idx,
5042                     le16_to_cpu(iocb->u.isp24.nport_handle),
5043                     iocb->u.isp24.status_subcode);
5044                 if (tgt->link_reinit_iocb_pending) {
5045                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
5046                             0, 0, 0, 0, 0, 0);
5047                 }
5048                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5049                 tgt->link_reinit_iocb_pending = 1;
5050                 /*
5051                  * QLogic requires to wait after LINK REINIT for possible
5052                  * PDISC or ADISC ELS commands
5053                  */
5054                 send_notify_ack = 0;
5055                 break;
5056         }
5057
5058         case IMM_NTFY_PORT_LOGOUT:
5059                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5060                     "qla_target(%d): Port logout (loop "
5061                     "%#x, subcode %x)\n", vha->vp_idx,
5062                     le16_to_cpu(iocb->u.isp24.nport_handle),
5063                     iocb->u.isp24.status_subcode);
5064
5065                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5066                         send_notify_ack = 0;
5067                 /* The sessions will be cleared in the callback, if needed */
5068                 break;
5069
5070         case IMM_NTFY_GLBL_TPRLO:
5071                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5072                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5073                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5074                         send_notify_ack = 0;
5075                 /* The sessions will be cleared in the callback, if needed */
5076                 break;
5077
5078         case IMM_NTFY_PORT_CONFIG:
5079                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5080                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5081                     status);
5082                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5083                         send_notify_ack = 0;
5084                 /* The sessions will be cleared in the callback, if needed */
5085                 break;
5086
5087         case IMM_NTFY_GLBL_LOGO:
5088                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5089                     "qla_target(%d): Link failure detected\n",
5090                     vha->vp_idx);
5091                 /* I_T nexus loss */
5092                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5093                         send_notify_ack = 0;
5094                 break;
5095
5096         case IMM_NTFY_IOCB_OVERFLOW:
5097                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5098                     "qla_target(%d): Cannot provide requested "
5099                     "capability (IOCB overflowed the immediate notify "
5100                     "resource count)\n", vha->vp_idx);
5101                 break;
5102
5103         case IMM_NTFY_ABORT_TASK:
5104                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5105                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5106                     "L %#x)\n", vha->vp_idx,
5107                     le16_to_cpu(iocb->u.isp2x.seq_id),
5108                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5109                     le16_to_cpu(iocb->u.isp2x.lun));
5110                 if (qlt_abort_task(vha, iocb) == 0)
5111                         send_notify_ack = 0;
5112                 break;
5113
5114         case IMM_NTFY_RESOURCE:
5115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5116                     "qla_target(%d): Out of resources, host %ld\n",
5117                     vha->vp_idx, vha->host_no);
5118                 break;
5119
5120         case IMM_NTFY_MSG_RX:
5121                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5122                     "qla_target(%d): Immediate notify task %x\n",
5123                     vha->vp_idx, iocb->u.isp2x.task_flags);
5124                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5125                         send_notify_ack = 0;
5126                 break;
5127
5128         case IMM_NTFY_ELS:
5129                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5130                         send_notify_ack = 0;
5131                 break;
5132
5133         case IMM_NTFY_SRR:
5134                 qlt_prepare_srr_imm(vha, iocb);
5135                 send_notify_ack = 0;
5136                 break;
5137
5138         default:
5139                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5140                     "qla_target(%d): Received unknown immediate "
5141                     "notify status %x\n", vha->vp_idx, status);
5142                 break;
5143         }
5144
5145         if (send_notify_ack)
5146                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
5147 }
5148
5149 /*
5150  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5151  * This function sends busy to ISP 2xxx or 24xx.
5152  */
5153 static int __qlt_send_busy(struct scsi_qla_host *vha,
5154         struct atio_from_isp *atio, uint16_t status)
5155 {
5156         struct ctio7_to_24xx *ctio24;
5157         struct qla_hw_data *ha = vha->hw;
5158         request_t *pkt;
5159         struct qla_tgt_sess *sess = NULL;
5160         unsigned long flags;
5161
5162         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5163         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5164             atio->u.isp24.fcp_hdr.s_id);
5165         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5166         if (!sess) {
5167                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5168                 return 0;
5169         }
5170         /* Sending marker isn't necessary, since we called from ISR */
5171
5172         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5173         if (!pkt) {
5174                 ql_dbg(ql_dbg_io, vha, 0x3063,
5175                     "qla_target(%d): %s failed: unable to allocate "
5176                     "request packet", vha->vp_idx, __func__);
5177                 return -ENOMEM;
5178         }
5179
5180         vha->tgt_counters.num_q_full_sent++;
5181         pkt->entry_count = 1;
5182         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5183
5184         ctio24 = (struct ctio7_to_24xx *)pkt;
5185         ctio24->entry_type = CTIO_TYPE7;
5186         ctio24->nport_handle = sess->loop_id;
5187         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5188         ctio24->vp_index = vha->vp_idx;
5189         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5190         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5191         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5192         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5193         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5194             cpu_to_le16(
5195                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5196                 CTIO7_FLAGS_DONT_RET_CTIO);
5197         /*
5198          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5199          * if the explicit conformation is used.
5200          */
5201         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5202         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5203         /* Memory Barrier */
5204         wmb();
5205         qla2x00_start_iocbs(vha, vha->req);
5206         return 0;
5207 }
5208
5209 /*
5210  * This routine is used to allocate a command for either a QFull condition
5211  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5212  * out previously.
5213  */
5214 static void
5215 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5216         struct atio_from_isp *atio, uint16_t status, int qfull)
5217 {
5218         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5219         struct qla_hw_data *ha = vha->hw;
5220         struct qla_tgt_sess *sess;
5221         struct se_session *se_sess;
5222         struct qla_tgt_cmd *cmd;
5223         int tag;
5224
5225         if (unlikely(tgt->tgt_stop)) {
5226                 ql_dbg(ql_dbg_io, vha, 0x300a,
5227                         "New command while device %p is shutting down\n", tgt);
5228                 return;
5229         }
5230
5231         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5232                 vha->hw->tgt.num_qfull_cmds_dropped++;
5233                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5234                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5235                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5236                                 vha->hw->tgt.num_qfull_cmds_dropped;
5237
5238                 ql_dbg(ql_dbg_io, vha, 0x3068,
5239                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5240                         vha->vp_idx, __func__,
5241                         vha->hw->tgt.num_qfull_cmds_dropped);
5242
5243                 qlt_chk_exch_leak_thresh_hold(vha);
5244                 return;
5245         }
5246
5247         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5248                 (vha, atio->u.isp24.fcp_hdr.s_id);
5249         if (!sess)
5250                 return;
5251
5252         se_sess = sess->se_sess;
5253
5254         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5255         if (tag < 0)
5256                 return;
5257
5258         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5259         if (!cmd) {
5260                 ql_dbg(ql_dbg_io, vha, 0x3009,
5261                         "qla_target(%d): %s: Allocation of cmd failed\n",
5262                         vha->vp_idx, __func__);
5263
5264                 vha->hw->tgt.num_qfull_cmds_dropped++;
5265                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5266                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5267                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5268                                 vha->hw->tgt.num_qfull_cmds_dropped;
5269
5270                 qlt_chk_exch_leak_thresh_hold(vha);
5271                 return;
5272         }
5273
5274         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5275
5276         qlt_incr_num_pend_cmds(vha);
5277         INIT_LIST_HEAD(&cmd->cmd_list);
5278         memcpy(&cmd->atio, atio, sizeof(*atio));
5279
5280         cmd->tgt = vha->vha_tgt.qla_tgt;
5281         cmd->vha = vha;
5282         cmd->reset_count = vha->hw->chip_reset;
5283         cmd->q_full = 1;
5284
5285         if (qfull) {
5286                 cmd->q_full = 1;
5287                 /* NOTE: borrowing the state field to carry the status */
5288                 cmd->state = status;
5289         } else
5290                 cmd->term_exchg = 1;
5291
5292         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5293
5294         vha->hw->tgt.num_qfull_cmds_alloc++;
5295         if (vha->hw->tgt.num_qfull_cmds_alloc >
5296                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5297                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5298                         vha->hw->tgt.num_qfull_cmds_alloc;
5299 }
5300
5301 int
5302 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5303 {
5304         struct qla_hw_data *ha = vha->hw;
5305         unsigned long flags;
5306         struct qla_tgt_cmd *cmd, *tcmd;
5307         struct list_head free_list;
5308         int rc = 0;
5309
5310         if (list_empty(&ha->tgt.q_full_list))
5311                 return 0;
5312
5313         INIT_LIST_HEAD(&free_list);
5314
5315         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5316
5317         if (list_empty(&ha->tgt.q_full_list)) {
5318                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5319                 return 0;
5320         }
5321
5322         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5323                 if (cmd->q_full)
5324                         /* cmd->state is a borrowed field to hold status */
5325                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5326                 else if (cmd->term_exchg)
5327                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5328
5329                 if (rc == -ENOMEM)
5330                         break;
5331
5332                 if (cmd->q_full)
5333                         ql_dbg(ql_dbg_io, vha, 0x3006,
5334                             "%s: busy sent for ox_id[%04x]\n", __func__,
5335                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5336                 else if (cmd->term_exchg)
5337                         ql_dbg(ql_dbg_io, vha, 0x3007,
5338                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5339                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5340                 else
5341                         ql_dbg(ql_dbg_io, vha, 0x3008,
5342                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5343                             cmd);
5344
5345                 list_del(&cmd->cmd_list);
5346                 list_add_tail(&cmd->cmd_list, &free_list);
5347
5348                 /* piggy back on hardware_lock for protection */
5349                 vha->hw->tgt.num_qfull_cmds_alloc--;
5350         }
5351         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5352
5353         cmd = NULL;
5354
5355         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5356                 list_del(&cmd->cmd_list);
5357                 /* This cmd was never sent to TCM.  There is no need
5358                  * to schedule free or call free_cmd
5359                  */
5360                 qlt_free_cmd(cmd);
5361         }
5362         return rc;
5363 }
5364
5365 static void
5366 qlt_send_busy(struct scsi_qla_host *vha,
5367         struct atio_from_isp *atio, uint16_t status)
5368 {
5369         int rc = 0;
5370
5371         rc = __qlt_send_busy(vha, atio, status);
5372         if (rc == -ENOMEM)
5373                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5374 }
5375
5376 static int
5377 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5378         struct atio_from_isp *atio)
5379 {
5380         struct qla_hw_data *ha = vha->hw;
5381         uint16_t status;
5382
5383         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5384                 return 0;
5385
5386         status = temp_sam_status;
5387         qlt_send_busy(vha, atio, status);
5388         return 1;
5389 }
5390
5391 /* ha->hardware_lock supposed to be held on entry */
5392 /* called via callback from qla2xxx */
5393 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5394         struct atio_from_isp *atio, uint8_t ha_locked)
5395 {
5396         struct qla_hw_data *ha = vha->hw;
5397         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5398         int rc;
5399         unsigned long flags;
5400
5401         if (unlikely(tgt == NULL)) {
5402                 ql_dbg(ql_dbg_io, vha, 0x3064,
5403                     "ATIO pkt, but no tgt (ha %p)", ha);
5404                 return;
5405         }
5406         /*
5407          * In tgt_stop mode we also should allow all requests to pass.
5408          * Otherwise, some commands can stuck.
5409          */
5410
5411         tgt->atio_irq_cmd_count++;
5412
5413         switch (atio->u.raw.entry_type) {
5414         case ATIO_TYPE7:
5415                 if (unlikely(atio->u.isp24.exchange_addr ==
5416                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5417                         ql_dbg(ql_dbg_io, vha, 0x3065,
5418                             "qla_target(%d): ATIO_TYPE7 "
5419                             "received with UNKNOWN exchange address, "
5420                             "sending QUEUE_FULL\n", vha->vp_idx);
5421                         if (!ha_locked)
5422                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5423                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5424                         if (!ha_locked)
5425                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5426                         break;
5427                 }
5428
5429
5430
5431                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5432                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5433                         if (rc != 0) {
5434                                 tgt->atio_irq_cmd_count--;
5435                                 return;
5436                         }
5437                         rc = qlt_handle_cmd_for_atio(vha, atio);
5438                 } else {
5439                         rc = qlt_handle_task_mgmt(vha, atio);
5440                 }
5441                 if (unlikely(rc != 0)) {
5442                         if (rc == -ESRCH) {
5443                                 if (!ha_locked)
5444                                         spin_lock_irqsave
5445                                                 (&ha->hardware_lock, flags);
5446
5447 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5448                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5449 #else
5450                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5451 #endif
5452
5453                                 if (!ha_locked)
5454                                         spin_unlock_irqrestore
5455                                                 (&ha->hardware_lock, flags);
5456
5457                         } else {
5458                                 if (tgt->tgt_stop) {
5459                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5460                                             "qla_target: Unable to send "
5461                                             "command to target for req, "
5462                                             "ignoring.\n");
5463                                 } else {
5464                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5465                                             "qla_target(%d): Unable to send "
5466                                             "command to target, sending BUSY "
5467                                             "status.\n", vha->vp_idx);
5468                                         if (!ha_locked)
5469                                                 spin_lock_irqsave(
5470                                                     &ha->hardware_lock, flags);
5471                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5472                                         if (!ha_locked)
5473                                                 spin_unlock_irqrestore(
5474                                                     &ha->hardware_lock, flags);
5475                                 }
5476                         }
5477                 }
5478                 break;
5479
5480         case IMMED_NOTIFY_TYPE:
5481         {
5482                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5483                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5484                             "qla_target(%d): Received ATIO packet %x "
5485                             "with error status %x\n", vha->vp_idx,
5486                             atio->u.raw.entry_type,
5487                             atio->u.isp2x.entry_status);
5488                         break;
5489                 }
5490                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5491
5492                 if (!ha_locked)
5493                         spin_lock_irqsave(&ha->hardware_lock, flags);
5494                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5495                 if (!ha_locked)
5496                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5497                 break;
5498         }
5499
5500         default:
5501                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5502                     "qla_target(%d): Received unknown ATIO atio "
5503                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5504                 break;
5505         }
5506
5507         tgt->atio_irq_cmd_count--;
5508 }
5509
5510 /* ha->hardware_lock supposed to be held on entry */
5511 /* called via callback from qla2xxx */
5512 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5513 {
5514         struct qla_hw_data *ha = vha->hw;
5515         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5516
5517         if (unlikely(tgt == NULL)) {
5518                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5519                     "qla_target(%d): Response pkt %x received, but no "
5520                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5521                 return;
5522         }
5523
5524         /*
5525          * In tgt_stop mode we also should allow all requests to pass.
5526          * Otherwise, some commands can stuck.
5527          */
5528
5529         tgt->irq_cmd_count++;
5530
5531         switch (pkt->entry_type) {
5532         case CTIO_CRC2:
5533         case CTIO_TYPE7:
5534         {
5535                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5536                 qlt_do_ctio_completion(vha, entry->handle,
5537                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5538                     entry);
5539                 break;
5540         }
5541
5542         case ACCEPT_TGT_IO_TYPE:
5543         {
5544                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5545                 int rc;
5546                 if (atio->u.isp2x.status !=
5547                     cpu_to_le16(ATIO_CDB_VALID)) {
5548                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5549                             "qla_target(%d): ATIO with error "
5550                             "status %x received\n", vha->vp_idx,
5551                             le16_to_cpu(atio->u.isp2x.status));
5552                         break;
5553                 }
5554
5555                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5556                 if (rc != 0) {
5557                         tgt->irq_cmd_count--;
5558                         return;
5559                 }
5560
5561                 rc = qlt_handle_cmd_for_atio(vha, atio);
5562                 if (unlikely(rc != 0)) {
5563                         if (rc == -ESRCH) {
5564 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5565                                 qlt_send_busy(vha, atio, 0);
5566 #else
5567                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5568 #endif
5569                         } else {
5570                                 if (tgt->tgt_stop) {
5571                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5572                                             "qla_target: Unable to send "
5573                                             "command to target, sending TERM "
5574                                             "EXCHANGE for rsp\n");
5575                                         qlt_send_term_exchange(vha, NULL,
5576                                             atio, 1, 0);
5577                                 } else {
5578                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5579                                             "qla_target(%d): Unable to send "
5580                                             "command to target, sending BUSY "
5581                                             "status\n", vha->vp_idx);
5582                                         qlt_send_busy(vha, atio, 0);
5583                                 }
5584                         }
5585                 }
5586         }
5587         break;
5588
5589         case CONTINUE_TGT_IO_TYPE:
5590         {
5591                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5592                 qlt_do_ctio_completion(vha, entry->handle,
5593                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5594                     entry);
5595                 break;
5596         }
5597
5598         case CTIO_A64_TYPE:
5599         {
5600                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5601                 qlt_do_ctio_completion(vha, entry->handle,
5602                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5603                     entry);
5604                 break;
5605         }
5606
5607         case IMMED_NOTIFY_TYPE:
5608                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5609                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5610                 break;
5611
5612         case NOTIFY_ACK_TYPE:
5613                 if (tgt->notify_ack_expected > 0) {
5614                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5615                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5616                             "NOTIFY_ACK seq %08x status %x\n",
5617                             le16_to_cpu(entry->u.isp2x.seq_id),
5618                             le16_to_cpu(entry->u.isp2x.status));
5619                         tgt->notify_ack_expected--;
5620                         if (entry->u.isp2x.status !=
5621                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5622                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5623                                     "qla_target(%d): NOTIFY_ACK "
5624                                     "failed %x\n", vha->vp_idx,
5625                                     le16_to_cpu(entry->u.isp2x.status));
5626                         }
5627                 } else {
5628                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5629                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5630                             vha->vp_idx);
5631                 }
5632                 break;
5633
5634         case ABTS_RECV_24XX:
5635                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5636                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5637                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5638                 break;
5639
5640         case ABTS_RESP_24XX:
5641                 if (tgt->abts_resp_expected > 0) {
5642                         struct abts_resp_from_24xx_fw *entry =
5643                                 (struct abts_resp_from_24xx_fw *)pkt;
5644                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5645                             "ABTS_RESP_24XX: compl_status %x\n",
5646                             entry->compl_status);
5647                         tgt->abts_resp_expected--;
5648                         if (le16_to_cpu(entry->compl_status) !=
5649                             ABTS_RESP_COMPL_SUCCESS) {
5650                                 if ((entry->error_subcode1 == 0x1E) &&
5651                                     (entry->error_subcode2 == 0)) {
5652                                         /*
5653                                          * We've got a race here: aborted
5654                                          * exchange not terminated, i.e.
5655                                          * response for the aborted command was
5656                                          * sent between the abort request was
5657                                          * received and processed.
5658                                          * Unfortunately, the firmware has a
5659                                          * silly requirement that all aborted
5660                                          * exchanges must be explicitely
5661                                          * terminated, otherwise it refuses to
5662                                          * send responses for the abort
5663                                          * requests. So, we have to
5664                                          * (re)terminate the exchange and retry
5665                                          * the abort response.
5666                                          */
5667                                         qlt_24xx_retry_term_exchange(vha,
5668                                             entry);
5669                                 } else
5670                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5671                                             "qla_target(%d): ABTS_RESP_24XX "
5672                                             "failed %x (subcode %x:%x)",
5673                                             vha->vp_idx, entry->compl_status,
5674                                             entry->error_subcode1,
5675                                             entry->error_subcode2);
5676                         }
5677                 } else {
5678                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5679                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5680                             "received\n", vha->vp_idx);
5681                 }
5682                 break;
5683
5684         default:
5685                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5686                     "qla_target(%d): Received unknown response pkt "
5687                     "type %x\n", vha->vp_idx, pkt->entry_type);
5688                 break;
5689         }
5690
5691         tgt->irq_cmd_count--;
5692 }
5693
5694 /*
5695  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5696  */
5697 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5698         uint16_t *mailbox)
5699 {
5700         struct qla_hw_data *ha = vha->hw;
5701         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5702         int login_code;
5703
5704         if (!ha->tgt.tgt_ops)
5705                 return;
5706
5707         if (unlikely(tgt == NULL)) {
5708                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5709                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5710                 return;
5711         }
5712
5713         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5714             IS_QLA2100(ha))
5715                 return;
5716         /*
5717          * In tgt_stop mode we also should allow all requests to pass.
5718          * Otherwise, some commands can stuck.
5719          */
5720
5721         tgt->irq_cmd_count++;
5722
5723         switch (code) {
5724         case MBA_RESET:                 /* Reset */
5725         case MBA_SYSTEM_ERR:            /* System Error */
5726         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5727         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5729                     "qla_target(%d): System error async event %#x "
5730                     "occurred", vha->vp_idx, code);
5731                 break;
5732         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5733                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5734                 break;
5735
5736         case MBA_LOOP_UP:
5737         {
5738                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5739                     "qla_target(%d): Async LOOP_UP occurred "
5740                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5741                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5742                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5743                 if (tgt->link_reinit_iocb_pending) {
5744                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5745                             0, 0, 0, 0, 0, 0);
5746                         tgt->link_reinit_iocb_pending = 0;
5747                 }
5748                 break;
5749         }
5750
5751         case MBA_LIP_OCCURRED:
5752         case MBA_LOOP_DOWN:
5753         case MBA_LIP_RESET:
5754         case MBA_RSCN_UPDATE:
5755                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5756                     "qla_target(%d): Async event %#x occurred "
5757                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5758                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5759                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5760                 break;
5761
5762         case MBA_PORT_UPDATE:
5763                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5764                     "qla_target(%d): Port update async event %#x "
5765                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5766                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5767                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5768                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5769
5770                 login_code = le16_to_cpu(mailbox[2]);
5771                 if (login_code == 0x4)
5772                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5773                             "Async MB 2: Got PLOGI Complete\n");
5774                 else if (login_code == 0x7)
5775                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5776                             "Async MB 2: Port Logged Out\n");
5777                 break;
5778
5779         default:
5780                 break;
5781         }
5782
5783         tgt->irq_cmd_count--;
5784 }
5785
5786 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5787         uint16_t loop_id)
5788 {
5789         fc_port_t *fcport;
5790         int rc;
5791
5792         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5793         if (!fcport) {
5794                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5795                     "qla_target(%d): Allocation of tmp FC port failed",
5796                     vha->vp_idx);
5797                 return NULL;
5798         }
5799
5800         fcport->loop_id = loop_id;
5801
5802         rc = qla2x00_get_port_database(vha, fcport, 0);
5803         if (rc != QLA_SUCCESS) {
5804                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5805                     "qla_target(%d): Failed to retrieve fcport "
5806                     "information -- get_port_database() returned %x "
5807                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5808                 kfree(fcport);
5809                 return NULL;
5810         }
5811
5812         return fcport;
5813 }
5814
5815 /* Must be called under tgt_mutex */
5816 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5817         uint8_t *s_id)
5818 {
5819         struct qla_tgt_sess *sess = NULL;
5820         fc_port_t *fcport = NULL;
5821         int rc, global_resets;
5822         uint16_t loop_id = 0;
5823
5824         mutex_lock(&vha->vha_tgt.tgt_mutex);
5825
5826 retry:
5827         global_resets =
5828             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5829
5830         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5831         if (rc != 0) {
5832                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5833
5834                 if ((s_id[0] == 0xFF) &&
5835                     (s_id[1] == 0xFC)) {
5836                         /*
5837                          * This is Domain Controller, so it should be
5838                          * OK to drop SCSI commands from it.
5839                          */
5840                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5841                             "Unable to find initiator with S_ID %x:%x:%x",
5842                             s_id[0], s_id[1], s_id[2]);
5843                 } else
5844                         ql_log(ql_log_info, vha, 0xf071,
5845                             "qla_target(%d): Unable to find "
5846                             "initiator with S_ID %x:%x:%x",
5847                             vha->vp_idx, s_id[0], s_id[1],
5848                             s_id[2]);
5849
5850                 if (rc == -ENOENT) {
5851                         qlt_port_logo_t logo;
5852                         sid_to_portid(s_id, &logo.id);
5853                         logo.cmd_count = 1;
5854                         qlt_send_first_logo(vha, &logo);
5855                 }
5856
5857                 return NULL;
5858         }
5859
5860         fcport = qlt_get_port_database(vha, loop_id);
5861         if (!fcport) {
5862                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5863                 return NULL;
5864         }
5865
5866         if (global_resets !=
5867             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5868                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5869                     "qla_target(%d): global reset during session discovery "
5870                     "(counter was %d, new %d), retrying", vha->vp_idx,
5871                     global_resets,
5872                     atomic_read(&vha->vha_tgt.
5873                         qla_tgt->tgt_global_resets_count));
5874                 goto retry;
5875         }
5876
5877         sess = qlt_create_sess(vha, fcport, true);
5878
5879         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5880
5881         kfree(fcport);
5882         return sess;
5883 }
5884
5885 static void qlt_abort_work(struct qla_tgt *tgt,
5886         struct qla_tgt_sess_work_param *prm)
5887 {
5888         struct scsi_qla_host *vha = tgt->vha;
5889         struct qla_hw_data *ha = vha->hw;
5890         struct qla_tgt_sess *sess = NULL;
5891         unsigned long flags = 0, flags2 = 0;
5892         uint32_t be_s_id;
5893         uint8_t s_id[3];
5894         int rc;
5895
5896         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5897
5898         if (tgt->tgt_stop)
5899                 goto out_term2;
5900
5901         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5902         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5903         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5904
5905         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5906             (unsigned char *)&be_s_id);
5907         if (!sess) {
5908                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5909
5910                 sess = qlt_make_local_sess(vha, s_id);
5911                 /* sess has got an extra creation ref */
5912
5913                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5914                 if (!sess)
5915                         goto out_term2;
5916         } else {
5917                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5918                         sess = NULL;
5919                         goto out_term2;
5920                 }
5921
5922                 kref_get(&sess->sess_kref);
5923         }
5924
5925         spin_lock_irqsave(&ha->hardware_lock, flags);
5926
5927         if (tgt->tgt_stop)
5928                 goto out_term;
5929
5930         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5931         if (rc != 0)
5932                 goto out_term;
5933         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5934
5935         qlt_put_sess(sess);
5936         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5937         return;
5938
5939 out_term2:
5940         spin_lock_irqsave(&ha->hardware_lock, flags);
5941
5942 out_term:
5943         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5944         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5945
5946         qlt_put_sess(sess);
5947         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5948 }
5949
5950 static void qlt_tmr_work(struct qla_tgt *tgt,
5951         struct qla_tgt_sess_work_param *prm)
5952 {
5953         struct atio_from_isp *a = &prm->tm_iocb2;
5954         struct scsi_qla_host *vha = tgt->vha;
5955         struct qla_hw_data *ha = vha->hw;
5956         struct qla_tgt_sess *sess = NULL;
5957         unsigned long flags;
5958         uint8_t *s_id = NULL; /* to hide compiler warnings */
5959         int rc;
5960         uint32_t lun, unpacked_lun;
5961         int fn;
5962         void *iocb;
5963
5964         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5965
5966         if (tgt->tgt_stop)
5967                 goto out_term;
5968
5969         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5970         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5971         if (!sess) {
5972                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5973
5974                 sess = qlt_make_local_sess(vha, s_id);
5975                 /* sess has got an extra creation ref */
5976
5977                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5978                 if (!sess)
5979                         goto out_term;
5980         } else {
5981                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5982                         sess = NULL;
5983                         goto out_term;
5984                 }
5985
5986                 kref_get(&sess->sess_kref);
5987         }
5988
5989         iocb = a;
5990         lun = a->u.isp24.fcp_cmnd.lun;
5991         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5992         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5993
5994         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5995         if (rc != 0)
5996                 goto out_term;
5997
5998         qlt_put_sess(sess);
5999         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6000         return;
6001
6002 out_term:
6003         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
6004         qlt_put_sess(sess);
6005         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6006 }
6007
6008 static void qlt_sess_work_fn(struct work_struct *work)
6009 {
6010         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6011         struct scsi_qla_host *vha = tgt->vha;
6012         unsigned long flags;
6013
6014         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6015
6016         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6017         while (!list_empty(&tgt->sess_works_list)) {
6018                 struct qla_tgt_sess_work_param *prm = list_entry(
6019                     tgt->sess_works_list.next, typeof(*prm),
6020                     sess_works_list_entry);
6021
6022                 /*
6023                  * This work can be scheduled on several CPUs at time, so we
6024                  * must delete the entry to eliminate double processing
6025                  */
6026                 list_del(&prm->sess_works_list_entry);
6027
6028                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6029
6030                 switch (prm->type) {
6031                 case QLA_TGT_SESS_WORK_ABORT:
6032                         qlt_abort_work(tgt, prm);
6033                         break;
6034                 case QLA_TGT_SESS_WORK_TM:
6035                         qlt_tmr_work(tgt, prm);
6036                         break;
6037                 default:
6038                         BUG_ON(1);
6039                         break;
6040                 }
6041
6042                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6043
6044                 kfree(prm);
6045         }
6046         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6047 }
6048
6049 /* Must be called under tgt_host_action_mutex */
6050 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6051 {
6052         struct qla_tgt *tgt;
6053
6054         if (!QLA_TGT_MODE_ENABLED())
6055                 return 0;
6056
6057         if (!IS_TGT_MODE_CAPABLE(ha)) {
6058                 ql_log(ql_log_warn, base_vha, 0xe070,
6059                     "This adapter does not support target mode.\n");
6060                 return 0;
6061         }
6062
6063         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6064             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6065
6066         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6067
6068         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6069         if (!tgt) {
6070                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6071                     "Unable to allocate struct qla_tgt\n");
6072                 return -ENOMEM;
6073         }
6074
6075         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6076                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6077
6078         tgt->ha = ha;
6079         tgt->vha = base_vha;
6080         init_waitqueue_head(&tgt->waitQ);
6081         INIT_LIST_HEAD(&tgt->sess_list);
6082         INIT_LIST_HEAD(&tgt->del_sess_list);
6083         INIT_DELAYED_WORK(&tgt->sess_del_work,
6084                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
6085         spin_lock_init(&tgt->sess_work_lock);
6086         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6087         INIT_LIST_HEAD(&tgt->sess_works_list);
6088         spin_lock_init(&tgt->srr_lock);
6089         INIT_LIST_HEAD(&tgt->srr_ctio_list);
6090         INIT_LIST_HEAD(&tgt->srr_imm_list);
6091         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
6092         atomic_set(&tgt->tgt_global_resets_count, 0);
6093
6094         base_vha->vha_tgt.qla_tgt = tgt;
6095
6096         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6097                 "qla_target(%d): using 64 Bit PCI addressing",
6098                 base_vha->vp_idx);
6099         tgt->tgt_enable_64bit_addr = 1;
6100         /* 3 is reserved */
6101         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6102         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6103         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6104
6105         if (base_vha->fc_vport)
6106                 return 0;
6107
6108         mutex_lock(&qla_tgt_mutex);
6109         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6110         mutex_unlock(&qla_tgt_mutex);
6111
6112         return 0;
6113 }
6114
6115 /* Must be called under tgt_host_action_mutex */
6116 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6117 {
6118         if (!vha->vha_tgt.qla_tgt)
6119                 return 0;
6120
6121         if (vha->fc_vport) {
6122                 qlt_release(vha->vha_tgt.qla_tgt);
6123                 return 0;
6124         }
6125
6126         /* free left over qfull cmds */
6127         qlt_init_term_exchange(vha);
6128
6129         mutex_lock(&qla_tgt_mutex);
6130         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6131         mutex_unlock(&qla_tgt_mutex);
6132
6133         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6134             vha->host_no, ha);
6135         qlt_release(vha->vha_tgt.qla_tgt);
6136
6137         return 0;
6138 }
6139
6140 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6141         unsigned char *b)
6142 {
6143         int i;
6144
6145         pr_debug("qla2xxx HW vha->node_name: ");
6146         for (i = 0; i < WWN_SIZE; i++)
6147                 pr_debug("%02x ", vha->node_name[i]);
6148         pr_debug("\n");
6149         pr_debug("qla2xxx HW vha->port_name: ");
6150         for (i = 0; i < WWN_SIZE; i++)
6151                 pr_debug("%02x ", vha->port_name[i]);
6152         pr_debug("\n");
6153
6154         pr_debug("qla2xxx passed configfs WWPN: ");
6155         put_unaligned_be64(wwpn, b);
6156         for (i = 0; i < WWN_SIZE; i++)
6157                 pr_debug("%02x ", b[i]);
6158         pr_debug("\n");
6159 }
6160
6161 /**
6162  * qla_tgt_lport_register - register lport with external module
6163  *
6164  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6165  * @wwpn: Passwd FC target WWPN
6166  * @callback:  lport initialization callback for tcm_qla2xxx code
6167  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6168  */
6169 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6170                        u64 npiv_wwpn, u64 npiv_wwnn,
6171                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6172 {
6173         struct qla_tgt *tgt;
6174         struct scsi_qla_host *vha;
6175         struct qla_hw_data *ha;
6176         struct Scsi_Host *host;
6177         unsigned long flags;
6178         int rc;
6179         u8 b[WWN_SIZE];
6180
6181         mutex_lock(&qla_tgt_mutex);
6182         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6183                 vha = tgt->vha;
6184                 ha = vha->hw;
6185
6186                 host = vha->host;
6187                 if (!host)
6188                         continue;
6189
6190                 if (!(host->hostt->supported_mode & MODE_TARGET))
6191                         continue;
6192
6193                 spin_lock_irqsave(&ha->hardware_lock, flags);
6194                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6195                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6196                             host->host_no);
6197                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6198                         continue;
6199                 }
6200                 if (tgt->tgt_stop) {
6201                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6202                                  host->host_no);
6203                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6204                         continue;
6205                 }
6206                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6207
6208                 if (!scsi_host_get(host)) {
6209                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6210                             "Unable to scsi_host_get() for"
6211                             " qla2xxx scsi_host\n");
6212                         continue;
6213                 }
6214                 qlt_lport_dump(vha, phys_wwpn, b);
6215
6216                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6217                         scsi_host_put(host);
6218                         continue;
6219                 }
6220                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6221                 if (rc != 0)
6222                         scsi_host_put(host);
6223
6224                 mutex_unlock(&qla_tgt_mutex);
6225                 return rc;
6226         }
6227         mutex_unlock(&qla_tgt_mutex);
6228
6229         return -ENODEV;
6230 }
6231 EXPORT_SYMBOL(qlt_lport_register);
6232
6233 /**
6234  * qla_tgt_lport_deregister - Degister lport
6235  *
6236  * @vha:  Registered scsi_qla_host pointer
6237  */
6238 void qlt_lport_deregister(struct scsi_qla_host *vha)
6239 {
6240         struct qla_hw_data *ha = vha->hw;
6241         struct Scsi_Host *sh = vha->host;
6242         /*
6243          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6244          */
6245         vha->vha_tgt.target_lport_ptr = NULL;
6246         ha->tgt.tgt_ops = NULL;
6247         /*
6248          * Release the Scsi_Host reference for the underlying qla2xxx host
6249          */
6250         scsi_host_put(sh);
6251 }
6252 EXPORT_SYMBOL(qlt_lport_deregister);
6253
6254 /* Must be called under HW lock */
6255 static void qlt_set_mode(struct scsi_qla_host *vha)
6256 {
6257         struct qla_hw_data *ha = vha->hw;
6258
6259         switch (ql2x_ini_mode) {
6260         case QLA2XXX_INI_MODE_DISABLED:
6261         case QLA2XXX_INI_MODE_EXCLUSIVE:
6262                 vha->host->active_mode = MODE_TARGET;
6263                 break;
6264         case QLA2XXX_INI_MODE_ENABLED:
6265                 vha->host->active_mode |= MODE_TARGET;
6266                 break;
6267         default:
6268                 break;
6269         }
6270
6271         if (ha->tgt.ini_mode_force_reverse)
6272                 qla_reverse_ini_mode(vha);
6273 }
6274
6275 /* Must be called under HW lock */
6276 static void qlt_clear_mode(struct scsi_qla_host *vha)
6277 {
6278         struct qla_hw_data *ha = vha->hw;
6279
6280         switch (ql2x_ini_mode) {
6281         case QLA2XXX_INI_MODE_DISABLED:
6282                 vha->host->active_mode = MODE_UNKNOWN;
6283                 break;
6284         case QLA2XXX_INI_MODE_EXCLUSIVE:
6285                 vha->host->active_mode = MODE_INITIATOR;
6286                 break;
6287         case QLA2XXX_INI_MODE_ENABLED:
6288                 vha->host->active_mode &= ~MODE_TARGET;
6289                 break;
6290         default:
6291                 break;
6292         }
6293
6294         if (ha->tgt.ini_mode_force_reverse)
6295                 qla_reverse_ini_mode(vha);
6296 }
6297
6298 /*
6299  * qla_tgt_enable_vha - NO LOCK HELD
6300  *
6301  * host_reset, bring up w/ Target Mode Enabled
6302  */
6303 void
6304 qlt_enable_vha(struct scsi_qla_host *vha)
6305 {
6306         struct qla_hw_data *ha = vha->hw;
6307         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6308         unsigned long flags;
6309         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6310         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6311
6312         if (!tgt) {
6313                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6314                     "Unable to locate qla_tgt pointer from"
6315                     " struct qla_hw_data\n");
6316                 dump_stack();
6317                 return;
6318         }
6319
6320         spin_lock_irqsave(&ha->hardware_lock, flags);
6321         tgt->tgt_stopped = 0;
6322         qlt_set_mode(vha);
6323         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6324
6325         if (vha->vp_idx) {
6326                 qla24xx_disable_vp(vha);
6327                 qla24xx_enable_vp(vha);
6328         } else {
6329                 if (ha->msix_entries) {
6330                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6331                             "%s: host%ld : vector %d cpu %d\n",
6332                             __func__, vha->host_no,
6333                             ha->msix_entries[rspq_ent].vector,
6334                             ha->msix_entries[rspq_ent].cpuid);
6335
6336                         ha->tgt.rspq_vector_cpuid =
6337                             ha->msix_entries[rspq_ent].cpuid;
6338                 }
6339
6340                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6341                 qla2xxx_wake_dpc(base_vha);
6342                 qla2x00_wait_for_hba_online(base_vha);
6343         }
6344 }
6345 EXPORT_SYMBOL(qlt_enable_vha);
6346
6347 /*
6348  * qla_tgt_disable_vha - NO LOCK HELD
6349  *
6350  * Disable Target Mode and reset the adapter
6351  */
6352 static void qlt_disable_vha(struct scsi_qla_host *vha)
6353 {
6354         struct qla_hw_data *ha = vha->hw;
6355         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6356         unsigned long flags;
6357
6358         if (!tgt) {
6359                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6360                     "Unable to locate qla_tgt pointer from"
6361                     " struct qla_hw_data\n");
6362                 dump_stack();
6363                 return;
6364         }
6365
6366         spin_lock_irqsave(&ha->hardware_lock, flags);
6367         qlt_clear_mode(vha);
6368         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6369
6370         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6371         qla2xxx_wake_dpc(vha);
6372         qla2x00_wait_for_hba_online(vha);
6373 }
6374
6375 /*
6376  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6377  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6378  * members.
6379  */
6380 void
6381 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6382 {
6383         if (!qla_tgt_mode_enabled(vha))
6384                 return;
6385
6386         vha->vha_tgt.qla_tgt = NULL;
6387
6388         mutex_init(&vha->vha_tgt.tgt_mutex);
6389         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6390
6391         qlt_clear_mode(vha);
6392
6393         /*
6394          * NOTE: Currently the value is kept the same for <24xx and
6395          * >=24xx ISPs. If it is necessary to change it,
6396          * the check should be added for specific ISPs,
6397          * assigning the value appropriately.
6398          */
6399         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6400
6401         qlt_add_target(ha, vha);
6402 }
6403
6404 void
6405 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6406 {
6407         /*
6408          * FC-4 Feature bit 0 indicates target functionality to the name server.
6409          */
6410         if (qla_tgt_mode_enabled(vha)) {
6411                 if (qla_ini_mode_enabled(vha))
6412                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6413                 else
6414                         ct_req->req.rff_id.fc4_feature = BIT_0;
6415         } else if (qla_ini_mode_enabled(vha)) {
6416                 ct_req->req.rff_id.fc4_feature = BIT_1;
6417         }
6418 }
6419
6420 /*
6421  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6422  * @ha: HA context
6423  *
6424  * Beginning of ATIO ring has initialization control block already built
6425  * by nvram config routine.
6426  *
6427  * Returns 0 on success.
6428  */
6429 void
6430 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6431 {
6432         struct qla_hw_data *ha = vha->hw;
6433         uint16_t cnt;
6434         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6435
6436         if (!qla_tgt_mode_enabled(vha))
6437                 return;
6438
6439         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6440                 pkt->u.raw.signature = ATIO_PROCESSED;
6441                 pkt++;
6442         }
6443
6444 }
6445
6446 /*
6447  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6448  * @ha: SCSI driver HA context
6449  */
6450 void
6451 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6452 {
6453         struct qla_hw_data *ha = vha->hw;
6454         struct atio_from_isp *pkt;
6455         int cnt, i;
6456
6457         if (!vha->flags.online)
6458                 return;
6459
6460         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6461                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6462                 cnt = pkt->u.raw.entry_count;
6463
6464                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt,
6465                     ha_locked);
6466
6467                 for (i = 0; i < cnt; i++) {
6468                         ha->tgt.atio_ring_index++;
6469                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6470                                 ha->tgt.atio_ring_index = 0;
6471                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6472                         } else
6473                                 ha->tgt.atio_ring_ptr++;
6474
6475                         pkt->u.raw.signature = ATIO_PROCESSED;
6476                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6477                 }
6478                 wmb();
6479         }
6480
6481         /* Adjust ring index */
6482         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6483         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6484 }
6485
6486 void
6487 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6488 {
6489         struct qla_hw_data *ha = vha->hw;
6490         if (!QLA_TGT_MODE_ENABLED())
6491                 return;
6492
6493         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6494         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6495         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6496
6497         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6498                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6499                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6500
6501                 icb->msix_atio = cpu_to_le16(msix->entry);
6502                 ql_dbg(ql_dbg_init, vha, 0xf072,
6503                     "Registering ICB vector 0x%x for atio que.\n",
6504                     msix->entry);
6505         }
6506 }
6507
6508 void
6509 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6510 {
6511         struct qla_hw_data *ha = vha->hw;
6512
6513         if (qla_tgt_mode_enabled(vha)) {
6514                 if (!ha->tgt.saved_set) {
6515                         /* We save only once */
6516                         ha->tgt.saved_exchange_count = nv->exchange_count;
6517                         ha->tgt.saved_firmware_options_1 =
6518                             nv->firmware_options_1;
6519                         ha->tgt.saved_firmware_options_2 =
6520                             nv->firmware_options_2;
6521                         ha->tgt.saved_firmware_options_3 =
6522                             nv->firmware_options_3;
6523                         ha->tgt.saved_set = 1;
6524                 }
6525
6526                 nv->exchange_count = cpu_to_le16(0xFFFF);
6527
6528                 /* Enable target mode */
6529                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6530
6531                 /* Disable ini mode, if requested */
6532                 if (!qla_ini_mode_enabled(vha))
6533                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6534
6535                 /* Disable Full Login after LIP */
6536                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6537                 /* Enable initial LIP */
6538                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6539                 if (ql2xtgt_tape_enable)
6540                         /* Enable FC Tape support */
6541                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6542                 else
6543                         /* Disable FC Tape support */
6544                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6545
6546                 /* Disable Full Login after LIP */
6547                 nv->host_p &= cpu_to_le32(~BIT_10);
6548                 /* Enable target PRLI control */
6549                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6550         } else {
6551                 if (ha->tgt.saved_set) {
6552                         nv->exchange_count = ha->tgt.saved_exchange_count;
6553                         nv->firmware_options_1 =
6554                             ha->tgt.saved_firmware_options_1;
6555                         nv->firmware_options_2 =
6556                             ha->tgt.saved_firmware_options_2;
6557                         nv->firmware_options_3 =
6558                             ha->tgt.saved_firmware_options_3;
6559                 }
6560                 return;
6561         }
6562
6563         /* out-of-order frames reassembly */
6564         nv->firmware_options_3 |= BIT_6|BIT_9;
6565
6566         if (ha->tgt.enable_class_2) {
6567                 if (vha->flags.init_done)
6568                         fc_host_supported_classes(vha->host) =
6569                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6570
6571                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6572         } else {
6573                 if (vha->flags.init_done)
6574                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6575
6576                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6577         }
6578 }
6579
6580 void
6581 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6582         struct init_cb_24xx *icb)
6583 {
6584         struct qla_hw_data *ha = vha->hw;
6585
6586         if (!QLA_TGT_MODE_ENABLED())
6587                 return;
6588
6589         if (ha->tgt.node_name_set) {
6590                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6591                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6592         }
6593
6594         /* disable ZIO at start time. */
6595         if (!vha->flags.init_done) {
6596                 uint32_t tmp;
6597                 tmp = le32_to_cpu(icb->firmware_options_2);
6598                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6599                 icb->firmware_options_2 = cpu_to_le32(tmp);
6600         }
6601 }
6602
6603 void
6604 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6605 {
6606         struct qla_hw_data *ha = vha->hw;
6607
6608         if (!QLA_TGT_MODE_ENABLED())
6609                 return;
6610
6611         if (qla_tgt_mode_enabled(vha)) {
6612                 if (!ha->tgt.saved_set) {
6613                         /* We save only once */
6614                         ha->tgt.saved_exchange_count = nv->exchange_count;
6615                         ha->tgt.saved_firmware_options_1 =
6616                             nv->firmware_options_1;
6617                         ha->tgt.saved_firmware_options_2 =
6618                             nv->firmware_options_2;
6619                         ha->tgt.saved_firmware_options_3 =
6620                             nv->firmware_options_3;
6621                         ha->tgt.saved_set = 1;
6622                 }
6623
6624                 nv->exchange_count = cpu_to_le16(0xFFFF);
6625
6626                 /* Enable target mode */
6627                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6628
6629                 /* Disable ini mode, if requested */
6630                 if (!qla_ini_mode_enabled(vha))
6631                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6632
6633                 /* Disable Full Login after LIP */
6634                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6635                 /* Enable initial LIP */
6636                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6637                 if (ql2xtgt_tape_enable)
6638                         /* Enable FC tape support */
6639                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6640                 else
6641                         /* Disable FC tape support */
6642                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6643
6644                 /* Disable Full Login after LIP */
6645                 nv->host_p &= cpu_to_le32(~BIT_10);
6646                 /* Enable target PRLI control */
6647                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6648         } else {
6649                 if (ha->tgt.saved_set) {
6650                         nv->exchange_count = ha->tgt.saved_exchange_count;
6651                         nv->firmware_options_1 =
6652                             ha->tgt.saved_firmware_options_1;
6653                         nv->firmware_options_2 =
6654                             ha->tgt.saved_firmware_options_2;
6655                         nv->firmware_options_3 =
6656                             ha->tgt.saved_firmware_options_3;
6657                 }
6658                 return;
6659         }
6660
6661         /* out-of-order frames reassembly */
6662         nv->firmware_options_3 |= BIT_6|BIT_9;
6663
6664         if (ha->tgt.enable_class_2) {
6665                 if (vha->flags.init_done)
6666                         fc_host_supported_classes(vha->host) =
6667                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6668
6669                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6670         } else {
6671                 if (vha->flags.init_done)
6672                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6673
6674                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6675         }
6676 }
6677
6678 void
6679 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6680         struct init_cb_81xx *icb)
6681 {
6682         struct qla_hw_data *ha = vha->hw;
6683
6684         if (!QLA_TGT_MODE_ENABLED())
6685                 return;
6686
6687         if (ha->tgt.node_name_set) {
6688                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6689                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6690         }
6691
6692         /* disable ZIO at start time. */
6693         if (!vha->flags.init_done) {
6694                 uint32_t tmp;
6695                 tmp = le32_to_cpu(icb->firmware_options_2);
6696                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6697                 icb->firmware_options_2 = cpu_to_le32(tmp);
6698         }
6699
6700 }
6701
6702 void
6703 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6704 {
6705         if (!QLA_TGT_MODE_ENABLED())
6706                 return;
6707
6708         ha->msix_count += 1; /* For ATIO Q */
6709 }
6710
6711 int
6712 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6713         struct sts_entry_24xx *pkt)
6714 {
6715         switch (pkt->entry_type) {
6716         case ABTS_RECV_24XX:
6717         case ABTS_RESP_24XX:
6718         case CTIO_TYPE7:
6719         case NOTIFY_ACK_TYPE:
6720         case CTIO_CRC2:
6721                 return 1;
6722         default:
6723                 return 0;
6724         }
6725 }
6726
6727 void
6728 qlt_modify_vp_config(struct scsi_qla_host *vha,
6729         struct vp_config_entry_24xx *vpmod)
6730 {
6731         if (qla_tgt_mode_enabled(vha))
6732                 vpmod->options_idx1 &= ~BIT_5;
6733         /* Disable ini mode, if requested */
6734         if (!qla_ini_mode_enabled(vha))
6735                 vpmod->options_idx1 &= ~BIT_4;
6736 }
6737
6738 void
6739 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6740 {
6741         if (!QLA_TGT_MODE_ENABLED())
6742                 return;
6743
6744         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6745                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6746                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6747         } else {
6748                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6749                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6750         }
6751
6752         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6753         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6754         qlt_clear_mode(base_vha);
6755 }
6756
6757 irqreturn_t
6758 qla83xx_msix_atio_q(int irq, void *dev_id)
6759 {
6760         struct rsp_que *rsp;
6761         scsi_qla_host_t *vha;
6762         struct qla_hw_data *ha;
6763         unsigned long flags;
6764
6765         rsp = (struct rsp_que *) dev_id;
6766         ha = rsp->hw;
6767         vha = pci_get_drvdata(ha->pdev);
6768
6769         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6770
6771         qlt_24xx_process_atio_queue(vha, 0);
6772
6773         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6774
6775         return IRQ_HANDLED;
6776 }
6777
6778 static void
6779 qlt_handle_abts_recv_work(struct work_struct *work)
6780 {
6781         struct qla_tgt_sess_op *op = container_of(work,
6782                 struct qla_tgt_sess_op, work);
6783         scsi_qla_host_t *vha = op->vha;
6784         struct qla_hw_data *ha = vha->hw;
6785         unsigned long flags;
6786
6787         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6788                 return;
6789
6790         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6791         qlt_24xx_process_atio_queue(vha, 0);
6792         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6793
6794         spin_lock_irqsave(&ha->hardware_lock, flags);
6795         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6796         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6797 }
6798
6799 void
6800 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6801 {
6802         struct qla_tgt_sess_op *op;
6803
6804         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6805
6806         if (!op) {
6807                 /* do not reach for ATIO queue here.  This is best effort err
6808                  * recovery at this point.
6809                  */
6810                 qlt_response_pkt_all_vps(vha, pkt);
6811                 return;
6812         }
6813
6814         memcpy(&op->atio, pkt, sizeof(*pkt));
6815         op->vha = vha;
6816         op->chip_reset = vha->hw->chip_reset;
6817         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6818         queue_work(qla_tgt_wq, &op->work);
6819         return;
6820 }
6821
6822 int
6823 qlt_mem_alloc(struct qla_hw_data *ha)
6824 {
6825         if (!QLA_TGT_MODE_ENABLED())
6826                 return 0;
6827
6828         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6829             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6830         if (!ha->tgt.tgt_vp_map)
6831                 return -ENOMEM;
6832
6833         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6834             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6835             &ha->tgt.atio_dma, GFP_KERNEL);
6836         if (!ha->tgt.atio_ring) {
6837                 kfree(ha->tgt.tgt_vp_map);
6838                 return -ENOMEM;
6839         }
6840         return 0;
6841 }
6842
6843 void
6844 qlt_mem_free(struct qla_hw_data *ha)
6845 {
6846         if (!QLA_TGT_MODE_ENABLED())
6847                 return;
6848
6849         if (ha->tgt.atio_ring) {
6850                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6851                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6852                     ha->tgt.atio_dma);
6853         }
6854         kfree(ha->tgt.tgt_vp_map);
6855 }
6856
6857 /* vport_slock to be held by the caller */
6858 void
6859 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6860 {
6861         if (!QLA_TGT_MODE_ENABLED())
6862                 return;
6863
6864         switch (cmd) {
6865         case SET_VP_IDX:
6866                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6867                 break;
6868         case SET_AL_PA:
6869                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6870                 break;
6871         case RESET_VP_IDX:
6872                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6873                 break;
6874         case RESET_AL_PA:
6875                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6876                 break;
6877         }
6878 }
6879
6880 static int __init qlt_parse_ini_mode(void)
6881 {
6882         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6883                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6884         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6885                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6886         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6887                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6888         else
6889                 return false;
6890
6891         return true;
6892 }
6893
6894 int __init qlt_init(void)
6895 {
6896         int ret;
6897
6898         if (!qlt_parse_ini_mode()) {
6899                 ql_log(ql_log_fatal, NULL, 0xe06b,
6900                     "qlt_parse_ini_mode() failed\n");
6901                 return -EINVAL;
6902         }
6903
6904         if (!QLA_TGT_MODE_ENABLED())
6905                 return 0;
6906
6907         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6908             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6909             qla_tgt_mgmt_cmd), 0, NULL);
6910         if (!qla_tgt_mgmt_cmd_cachep) {
6911                 ql_log(ql_log_fatal, NULL, 0xe06d,
6912                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6913                 return -ENOMEM;
6914         }
6915
6916         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6917                                                  sizeof(qlt_plogi_ack_t),
6918                                                  __alignof__(qlt_plogi_ack_t),
6919                                                  0, NULL);
6920
6921         if (!qla_tgt_plogi_cachep) {
6922                 ql_log(ql_log_fatal, NULL, 0xe06d,
6923                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6924                 ret = -ENOMEM;
6925                 goto out_mgmt_cmd_cachep;
6926         }
6927
6928         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6929             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6930         if (!qla_tgt_mgmt_cmd_mempool) {
6931                 ql_log(ql_log_fatal, NULL, 0xe06e,
6932                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6933                 ret = -ENOMEM;
6934                 goto out_plogi_cachep;
6935         }
6936
6937         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6938         if (!qla_tgt_wq) {
6939                 ql_log(ql_log_fatal, NULL, 0xe06f,
6940                     "alloc_workqueue for qla_tgt_wq failed\n");
6941                 ret = -ENOMEM;
6942                 goto out_cmd_mempool;
6943         }
6944         /*
6945          * Return 1 to signal that initiator-mode is being disabled
6946          */
6947         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6948
6949 out_cmd_mempool:
6950         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6951 out_plogi_cachep:
6952         kmem_cache_destroy(qla_tgt_plogi_cachep);
6953 out_mgmt_cmd_cachep:
6954         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6955         return ret;
6956 }
6957
6958 void qlt_exit(void)
6959 {
6960         if (!QLA_TGT_MODE_ENABLED())
6961                 return;
6962
6963         destroy_workqueue(qla_tgt_wq);
6964         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6965         kmem_cache_destroy(qla_tgt_plogi_cachep);
6966         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6967 }