drivers/scsi/qla2xxx/tcm_qla2xxx.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * This file contains tcm implementation using v4 configfs fabric infrastructure
   4  * for QLogic target mode HBAs
   5  *
   6  * (c) Copyright 2010-2013 Datera, Inc.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@daterainc.com>
   9  *
  10  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  11  * the TCM_FC / Open-FCoE.org fabric module.
  12  *
  13  * Copyright (c) 2010 Cisco Systems, Inc
  14  *
  15  ****************************************************************************/
  16
  17
  18 #include <linux/module.h>
  19 #include <linux/utsname.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/list.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/configfs.h>
  26 #include <linux/ctype.h>
  27 #include <asm/unaligned.h>
  28 #include <scsi/scsi_host.h>
  29 #include <target/target_core_base.h>
  30 #include <target/target_core_fabric.h>
  31
  32 #include "qla_def.h"
  33 #include "qla_target.h"
  34 #include "tcm_qla2xxx.h"
  35
  36 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  37
  38 /*
  39  * Parse WWN.
  40  * If strict, we require lower-case hex and colon separators to be sure
  41  * the name is the same as what would be generated by ft_format_wwn()
  42  * so the name and wwn are mapped one-to-one.
  43  */
  44 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  45 {
  46         const char *cp;
  47         char c;
  48         u32 nibble;
  49         u32 byte = 0;
  50         u32 pos = 0;
  51         u32 err;
  52
  53         *wwn = 0;
  54         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  55                 c = *cp;
  56                 if (c == '\n' && cp[1] == '\0')
  57                         continue;
  58                 if (strict && pos++ == 2 && byte++ < 7) {
  59                         pos = 0;
  60                         if (c == ':')
  61                                 continue;
  62                         err = 1;
  63                         goto fail;
  64                 }
  65                 if (c == '\0') {
  66                         err = 2;
  67                         if (strict && byte != 8)
  68                                 goto fail;
  69                         return cp - name;
  70                 }
  71                 err = 3;
  72                 if (isdigit(c))
  73                         nibble = c - '0';
  74                 else if (isxdigit(c) && (islower(c) || !strict))
  75                         nibble = tolower(c) - 'a' + 10;
  76                 else
  77                         goto fail;
  78                 *wwn = (*wwn << 4) | nibble;
  79         }
  80         err = 4;
  81 fail:
  82         pr_debug("err %u len %zu pos %u byte %u\n",
  83                         err, cp - name, pos, byte);
  84         return -1;
  85 }
  86
  87 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
  88 {
  89         u8 b[8];
  90
  91         put_unaligned_be64(wwn, b);
  92         return snprintf(buf, len,
  93                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
  94                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
  95 }
  96
  97 /*
  98  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
  99  */
 100 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 101 {
 102         unsigned int i, j;
 103         u8 wwn[8];
 104
 105         memset(wwn, 0, sizeof(wwn));
 106
 107         /* Validate and store the new name */
 108         for (i = 0, j = 0; i < 16; i++) {
 109                 int value;
 110
 111                 value = hex_to_bin(*ns++);
 112                 if (value >= 0)
 113                         j = (j << 4) | value;
 114                 else
 115                         return -EINVAL;
 116
 117                 if (i % 2) {
 118                         wwn[i/2] = j & 0xff;
 119                         j = 0;
 120                 }
 121         }
 122
 123         *nm = wwn_to_u64(wwn);
 124         return 0;
 125 }
 126
 127 /*
 128  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 129  * store_fc_host_vport_create()
 130  */
 131 static int tcm_qla2xxx_npiv_parse_wwn(
 132         const char *name,
 133         size_t count,
 134         u64 *wwpn,
 135         u64 *wwnn)
 136 {
 137         unsigned int cnt = count;
 138         int rc;
 139
 140         *wwpn = 0;
 141         *wwnn = 0;
 142
 143         /* count may include a LF at end of string */
 144         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 145                 cnt--;
 146
 147         /* validate we have enough characters for WWPN */
 148         if ((cnt != (16+1+16)) || (name[16] != ':'))
 149                 return -EINVAL;
 150
 151         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 152         if (rc != 0)
 153                 return rc;
 154
 155         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 156         if (rc != 0)
 157                 return rc;
 158
 159         return 0;
 160 }
 161
 162 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 163 {
 164         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 165                                 struct tcm_qla2xxx_tpg, se_tpg);
 166         struct tcm_qla2xxx_lport *lport = tpg->lport;
 167
 168         return lport->lport_naa_name;
 169 }
 170
 171 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 172 {
 173         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 174                                 struct tcm_qla2xxx_tpg, se_tpg);
 175         return tpg->lport_tpgt;
 176 }
 177
 178 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 179 {
 180         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 181                                 struct tcm_qla2xxx_tpg, se_tpg);
 182
 183         return tpg->tpg_attrib.generate_node_acls;
 184 }
 185
 186 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 187 {
 188         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 189                                 struct tcm_qla2xxx_tpg, se_tpg);
 190
 191         return tpg->tpg_attrib.cache_dynamic_acls;
 192 }
 193
 194 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 195 {
 196         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 197                                 struct tcm_qla2xxx_tpg, se_tpg);
 198
 199         return tpg->tpg_attrib.demo_mode_write_protect;
 200 }
 201
 202 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 203 {
 204         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 205                                 struct tcm_qla2xxx_tpg, se_tpg);
 206
 207         return tpg->tpg_attrib.prod_mode_write_protect;
 208 }
 209
 210 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 211 {
 212         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 213                                 struct tcm_qla2xxx_tpg, se_tpg);
 214
 215         return tpg->tpg_attrib.demo_mode_login_only;
 216 }
 217
 218 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 219 {
 220         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 221                                 struct tcm_qla2xxx_tpg, se_tpg);
 222
 223         return tpg->tpg_attrib.fabric_prot_type;
 224 }
 225
 226 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 227 {
 228         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 229                                 struct tcm_qla2xxx_tpg, se_tpg);
 230
 231         return tpg->lport_tpgt;
 232 }
 233
 234 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 235 {
 236         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 237                         struct qla_tgt_mgmt_cmd, free_work);
 238
 239         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 240 }
 241
 242 /*
 243  * Called from qla_target_template->free_mcmd(), and will call
 244  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 245  * release callback.  qla_hw_data->hardware_lock is expected to be held
 246  */
 247 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 248 {
 249         if (!mcmd)
 250                 return;
 251         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 252         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 253 }
 254
 255 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 256 {
 257         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 258         unsigned long flags;
 259
 260         cmd->cmd_in_wq = 0;
 261
 262         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 263
 264         /* To do: protect all tgt_counters manipulations with proper locking. */
 265         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 266         cmd->trc_flags |= TRC_CMD_FREE;
 267         cmd->cmd_sent_to_fw = 0;
 268
 269         spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 270         list_del_init(&cmd->sess_cmd_list);
 271         spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 272
 273         transport_generic_free_cmd(&cmd->se_cmd, 0);
 274 }
 275
 276 static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
 277 {
 278         struct se_session *se_sess = sess->se_sess;
 279         struct qla_tgt_cmd *cmd;
 280         int tag, cpu;
 281
 282         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
 283         if (tag < 0)
 284                 return NULL;
 285
 286         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
 287         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
 288         cmd->se_cmd.map_tag = tag;
 289         cmd->se_cmd.map_cpu = cpu;
 290
 291         return cmd;
 292 }
 293
 294 static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
 295 {
 296         target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
 297 }
 298
 299 /*
 300  * Called from qla_target_template->free_cmd(), and will call
 301  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 302  * release callback.  qla_hw_data->hardware_lock is expected to be held
 303  */
 304 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 305 {
 306         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 307         cmd->cmd_in_wq = 1;
 308
 309         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 310         cmd->trc_flags |= TRC_CMD_DONE;
 311
 312         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 313         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 314 }
 315
 316 /*
 317  * Called from struct target_core_fabric_ops->check_stop_free() context
 318  */
 319 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 320 {
 321         struct qla_tgt_cmd *cmd;
 322
 323         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 324                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 325                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 326         }
 327
 328         return target_put_sess_cmd(se_cmd);
 329 }
 330
 331 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 332  * fabric descriptor @se_cmd command to release
 333  */
 334 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 335 {
 336         struct qla_tgt_cmd *cmd;
 337
 338         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 339                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 340                                 struct qla_tgt_mgmt_cmd, se_cmd);
 341                 qlt_free_mcmd(mcmd);
 342                 return;
 343         }
 344         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 345
 346         if (WARN_ON(cmd->cmd_sent_to_fw))
 347                 return;
 348
 349         qlt_free_cmd(cmd);
 350 }
 351
 352 static void tcm_qla2xxx_release_session(struct kref *kref)
 353 {
 354         struct fc_port  *sess = container_of(kref,
 355             struct fc_port, sess_kref);
 356
 357         qlt_unreg_sess(sess);
 358 }
 359
 360 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 361 {
 362         if (!sess)
 363                 return;
 364
 365         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 366 }
 367
 368 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 369 {
 370         struct fc_port *sess = se_sess->fabric_sess_ptr;
 371
 372         BUG_ON(!sess);
 373
 374         target_stop_session(se_sess);
 375
 376         sess->explicit_logout = 1;
 377         tcm_qla2xxx_put_sess(sess);
 378 }
 379
 380 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 381 {
 382         return 0;
 383 }
 384
 385 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 386 {
 387         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 388                                 struct qla_tgt_cmd, se_cmd);
 389
 390         if (cmd->aborted) {
 391                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 392                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 393                  * already kick start the free.
 394                  */
 395                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 396                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 397                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 398                         cmd->se_cmd.transport_state,
 399                         cmd->se_cmd.t_state,
 400                         cmd->se_cmd.se_cmd_flags);
 401                 transport_generic_request_failure(&cmd->se_cmd,
 402                         TCM_CHECK_CONDITION_ABORT_CMD);
 403                 return 0;
 404         }
 405         cmd->trc_flags |= TRC_XFR_RDY;
 406         cmd->bufflen = se_cmd->data_length;
 407         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 408
 409         cmd->sg_cnt = se_cmd->t_data_nents;
 410         cmd->sg = se_cmd->t_data_sg;
 411
 412         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 413         cmd->prot_sg = se_cmd->t_prot_sg;
 414         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 415         se_cmd->pi_err = 0;
 416
 417         /*
 418          * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
 419          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 420          */
 421         return qlt_rdy_to_xfer(cmd);
 422 }
 423
 424 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 425 {
 426         return;
 427 }
 428
 429 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 430 {
 431         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 432                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 433                                 struct qla_tgt_cmd, se_cmd);
 434                 return cmd->state;
 435         }
 436
 437         return 0;
 438 }
 439
 440 /*
 441  * Called from process context in qla_target.c:qlt_do_work() code
 442  */
 443 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 444         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 445         int data_dir, int bidi)
 446 {
 447         struct se_cmd *se_cmd = &cmd->se_cmd;
 448         struct se_session *se_sess;
 449         struct fc_port *sess;
 450 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 451         struct se_portal_group *se_tpg;
 452         struct tcm_qla2xxx_tpg *tpg;
 453 #endif
 454         int rc, target_flags = TARGET_SCF_ACK_KREF;
 455         unsigned long flags;
 456
 457         if (bidi)
 458                 target_flags |= TARGET_SCF_BIDI_OP;
 459
 460         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 461                 target_flags |= TARGET_SCF_USE_CPUID;
 462
 463         sess = cmd->sess;
 464         if (!sess) {
 465                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 466                 return -EINVAL;
 467         }
 468
 469         se_sess = sess->se_sess;
 470         if (!se_sess) {
 471                 pr_err("Unable to locate active struct se_session\n");
 472                 return -EINVAL;
 473         }
 474
 475 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 476         se_tpg = se_sess->se_tpg;
 477         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 478         if (unlikely(tpg->tpg_attrib.jam_host)) {
 479                 /* return, and dont run target_submit_cmd,discarding command */
 480                 return 0;
 481         }
 482 #endif
 483         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 484
 485         spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 486         list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
 487         spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 488
 489         rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
 490                              cmd->unpacked_lun, data_length, fcp_task_attr,
 491                              data_dir, target_flags);
 492         if (rc)
 493                 return rc;
 494
 495         if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
 496                                GFP_KERNEL))
 497                 return 0;
 498
 499         target_submit(se_cmd);
 500         return 0;
 501 }
 502
 503 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 504 {
 505         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 506
 507         /*
 508          * Ensure that the complete FCP WRITE payload has been received.
 509          * Otherwise return an exception via CHECK_CONDITION status.
 510          */
 511         cmd->cmd_in_wq = 0;
 512         cmd->cmd_sent_to_fw = 0;
 513         if (cmd->aborted) {
 514                 transport_generic_request_failure(&cmd->se_cmd,
 515                         TCM_CHECK_CONDITION_ABORT_CMD);
 516                 return;
 517         }
 518
 519         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 520         if (!cmd->write_data_transferred) {
 521                 switch (cmd->dif_err_code) {
 522                 case DIF_ERR_GRD:
 523                         cmd->se_cmd.pi_err =
 524                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 525                         break;
 526                 case DIF_ERR_REF:
 527                         cmd->se_cmd.pi_err =
 528                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 529                         break;
 530                 case DIF_ERR_APP:
 531                         cmd->se_cmd.pi_err =
 532                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 533                         break;
 534                 case DIF_ERR_NONE:
 535                 default:
 536                         break;
 537                 }
 538
 539                 if (cmd->se_cmd.pi_err)
 540                         transport_generic_request_failure(&cmd->se_cmd,
 541                                 cmd->se_cmd.pi_err);
 542                 else
 543                         transport_generic_request_failure(&cmd->se_cmd,
 544                                 TCM_CHECK_CONDITION_ABORT_CMD);
 545
 546                 return;
 547         }
 548
 549         return target_execute_cmd(&cmd->se_cmd);
 550 }
 551
 552 /*
 553  * Called from qla_target.c:qlt_do_ctio_completion()
 554  */
 555 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 556 {
 557         cmd->trc_flags |= TRC_DATA_IN;
 558         cmd->cmd_in_wq = 1;
 559         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 560         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 561 }
 562
 563 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 564 {
 565         return 0;
 566 }
 567
 568 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 569     uint16_t *pfw_prot_opts)
 570 {
 571         struct se_cmd *se_cmd = &cmd->se_cmd;
 572
 573         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 574                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 575
 576         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 577                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 578
 579         return 0;
 580 }
 581
 582 /*
 583  * Called from qla_target.c:qlt_issue_task_mgmt()
 584  */
 585 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 586         uint16_t tmr_func, uint32_t tag)
 587 {
 588         struct fc_port *sess = mcmd->sess;
 589         struct se_cmd *se_cmd = &mcmd->se_cmd;
 590         int transl_tmr_func = 0;
 591
 592         switch (tmr_func) {
 593         case QLA_TGT_ABTS:
 594                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 595                 transl_tmr_func = TMR_ABORT_TASK;
 596                 break;
 597         case QLA_TGT_2G_ABORT_TASK:
 598                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 599                 transl_tmr_func = TMR_ABORT_TASK;
 600                 break;
 601         case QLA_TGT_CLEAR_ACA:
 602                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 603                 transl_tmr_func = TMR_CLEAR_ACA;
 604                 break;
 605         case QLA_TGT_TARGET_RESET:
 606                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 607                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 608                 break;
 609         case QLA_TGT_LUN_RESET:
 610                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 611                 transl_tmr_func = TMR_LUN_RESET;
 612                 break;
 613         case QLA_TGT_CLEAR_TS:
 614                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 615                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 616                 break;
 617         case QLA_TGT_ABORT_TS:
 618                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 619                 transl_tmr_func = TMR_ABORT_TASK_SET;
 620                 break;
 621         default:
 622                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 623                     sess->vha->host_no, tmr_func);
 624                 return -ENOSYS;
 625         }
 626
 627         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 628             transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 629 }
 630
 631 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 632     uint64_t tag)
 633 {
 634         struct qla_tgt_cmd *cmd;
 635         unsigned long flags;
 636
 637         if (!sess->se_sess)
 638                 return NULL;
 639
 640         spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 641         list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
 642                 if (cmd->se_cmd.tag == tag)
 643                         goto done;
 644         }
 645         cmd = NULL;
 646 done:
 647         spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 648
 649         return cmd;
 650 }
 651
 652 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 653 {
 654         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 655                                 struct qla_tgt_cmd, se_cmd);
 656
 657         if (cmd->aborted) {
 658                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 659                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 660                  * already kick start the free.
 661                  */
 662                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 663                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 664                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 665                         cmd->se_cmd.transport_state,
 666                         cmd->se_cmd.t_state,
 667                         cmd->se_cmd.se_cmd_flags);
 668                 return 0;
 669         }
 670
 671         cmd->trc_flags |= TRC_XMIT_DATA;
 672         cmd->bufflen = se_cmd->data_length;
 673         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 674
 675         cmd->sg_cnt = se_cmd->t_data_nents;
 676         cmd->sg = se_cmd->t_data_sg;
 677         cmd->offset = 0;
 678
 679         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 680         cmd->prot_sg = se_cmd->t_prot_sg;
 681         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 682         se_cmd->pi_err = 0;
 683
 684         /*
 685          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 686          */
 687         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 688                                 se_cmd->scsi_status);
 689 }
 690
 691 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 692 {
 693         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 694                                 struct qla_tgt_cmd, se_cmd);
 695         int xmit_type = QLA_TGT_XMIT_STATUS;
 696
 697         if (cmd->aborted) {
 698                 /*
 699                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 700                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 701                  * already kick start the free.
 702                  */
 703                 pr_debug(
 704                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 705                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 706                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 707                     cmd->se_cmd.se_cmd_flags);
 708                 return 0;
 709         }
 710         cmd->bufflen = se_cmd->data_length;
 711         cmd->sg = NULL;
 712         cmd->sg_cnt = 0;
 713         cmd->offset = 0;
 714         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 715         cmd->trc_flags |= TRC_XMIT_STATUS;
 716
 717         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 718                 /*
 719                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 720                  * for qla_tgt_xmit_response LLD code
 721                  */
 722                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 723                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 724                         se_cmd->residual_count = 0;
 725                 }
 726                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 727                 se_cmd->residual_count += se_cmd->data_length;
 728
 729                 cmd->bufflen = 0;
 730         }
 731         /*
 732          * Now queue status response to qla2xxx LLD code and response ring
 733          */
 734         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 735 }
 736
 737 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 738 {
 739         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 740         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 741                                 struct qla_tgt_mgmt_cmd, se_cmd);
 742
 743         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 744                         mcmd, se_tmr->function, se_tmr->response);
 745         /*
 746          * Do translation between TCM TM response codes and
 747          * QLA2xxx FC TM response codes.
 748          */
 749         switch (se_tmr->response) {
 750         case TMR_FUNCTION_COMPLETE:
 751                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 752                 break;
 753         case TMR_TASK_DOES_NOT_EXIST:
 754                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 755                 break;
 756         case TMR_FUNCTION_REJECTED:
 757                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 758                 break;
 759         case TMR_LUN_DOES_NOT_EXIST:
 760         default:
 761                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 762                 break;
 763         }
 764         /*
 765          * Queue the TM response to QLA2xxx LLD to build a
 766          * CTIO response packet.
 767          */
 768         qlt_xmit_tm_rsp(mcmd);
 769 }
 770
 771 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 772 {
 773         struct qla_tgt_cmd *cmd;
 774         unsigned long flags;
 775
 776         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 777                 return;
 778
 779         cmd  = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 780
 781         spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 782         list_del_init(&cmd->sess_cmd_list);
 783         spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 784
 785         qlt_abort_cmd(cmd);
 786 }
 787
 788 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 789                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 790 /*
 791  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 792  */
 793 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 794 {
 795         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 796         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 797         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 798         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 799                                 struct tcm_qla2xxx_lport, lport_wwn);
 800         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 801                                 struct tcm_qla2xxx_nacl, se_node_acl);
 802         void *node;
 803
 804         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 805
 806         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 807         if (WARN_ON(node && (node != se_nacl))) {
 808                 /*
 809                  * The nacl no longer matches what we think it should be.
 810                  * Most likely a new dynamic acl has been added while
 811                  * someone dropped the hardware lock.  It clearly is a
 812                  * bug elsewhere, but this bit can't make things worse.
 813                  */
 814                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 815                                node, GFP_ATOMIC);
 816         }
 817
 818         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 819             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 820         /*
 821          * Now clear the se_nacl and session pointers from our HW lport lookup
 822          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 823          *
 824          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 825          * target_wait_for_sess_cmds() before the session waits for outstanding
 826          * I/O to complete, to avoid a race between session shutdown execution
 827          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 828          */
 829         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 830 }
 831
 832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 833 {
 834         target_stop_session(sess->se_sess);
 835 }
 836
 837 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 838                 const char *name)
 839 {
 840         struct tcm_qla2xxx_nacl *nacl =
 841                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 842         u64 wwnn;
 843
 844         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 845                 return -EINVAL;
 846
 847         nacl->nport_wwnn = wwnn;
 848         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 849
 850         return 0;
 851 }
 852
 853 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 854
 855 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 856                                                                         \
 857 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 858                 struct config_item *item, char *page)                   \
 859 {                                                                       \
 860         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 861         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 862                         struct tcm_qla2xxx_tpg, se_tpg);                \
 863                                                                         \
 864         return sprintf(page, "%d\n", tpg->tpg_attrib.name);     \
 865 }                                                                       \
 866                                                                         \
 867 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 868                 struct config_item *item, const char *page, size_t count) \
 869 {                                                                       \
 870         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 871         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 872                         struct tcm_qla2xxx_tpg, se_tpg);                \
 873         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 874         unsigned long val;                                              \
 875         int ret;                                                        \
 876                                                                         \
 877         ret = kstrtoul(page, 0, &val);                                  \
 878         if (ret < 0) {                                                  \
 879                 pr_err("kstrtoul() failed with"                         \
 880                                 " ret: %d\n", ret);                     \
 881                 return -EINVAL;                                         \
 882         }                                                               \
 883                                                                         \
 884         if ((val != 0) && (val != 1)) {                                 \
 885                 pr_err("Illegal boolean value %lu\n", val);             \
 886                 return -EINVAL;                                         \
 887         }                                                               \
 888                                                                         \
 889         a->name = val;                                                  \
 890                                                                         \
 891         return count;                                                   \
 892 }                                                                       \
 893 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 894
 895 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 896 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 897 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 898 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 899 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 900 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 901 DEF_QLA_TPG_ATTRIB(jam_host);
 902 #endif
 903
 904 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 905         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 906         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 907         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 908         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 909         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 910 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 911         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 912 #endif
 913         NULL,
 914 };
 915
 916 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 917
 918 static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg,
 919                                   bool enable)
 920 {
 921         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 922         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 923                         struct tcm_qla2xxx_lport, lport_wwn);
 924         struct scsi_qla_host *vha = lport->qla_vha;
 925         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 926                         struct tcm_qla2xxx_tpg, se_tpg);
 927
 928         if (enable) {
 929                 if (atomic_read(&tpg->lport_tpg_enabled))
 930                         return -EEXIST;
 931
 932                 atomic_set(&tpg->lport_tpg_enabled, 1);
 933                 qlt_enable_vha(vha);
 934         } else {
 935                 if (!atomic_read(&tpg->lport_tpg_enabled))
 936                         return 0;
 937
 938                 atomic_set(&tpg->lport_tpg_enabled, 0);
 939                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 940                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 941         }
 942
 943         return 0;
 944 }
 945
 946 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 947                 char *page)
 948 {
 949         return target_show_dynamic_sessions(to_tpg(item), page);
 950 }
 951
 952 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 953                 const char *page, size_t count)
 954 {
 955         struct se_portal_group *se_tpg = to_tpg(item);
 956         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 957                                 struct tcm_qla2xxx_tpg, se_tpg);
 958         unsigned long val;
 959         int ret = kstrtoul(page, 0, &val);
 960
 961         if (ret) {
 962                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 963                 return ret;
 964         }
 965         if (val != 0 && val != 1 && val != 3) {
 966                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 967                 return -EINVAL;
 968         }
 969         tpg->tpg_attrib.fabric_prot_type = val;
 970
 971         return count;
 972 }
 973
 974 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 975                 char *page)
 976 {
 977         struct se_portal_group *se_tpg = to_tpg(item);
 978         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 979                                 struct tcm_qla2xxx_tpg, se_tpg);
 980
 981         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 982 }
 983
 984 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 985 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 986
 987 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 988         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
 989         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
 990         NULL,
 991 };
 992
 993 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
 994                                                     const char *name)
 995 {
 996         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 997                         struct tcm_qla2xxx_lport, lport_wwn);
 998         struct tcm_qla2xxx_tpg *tpg;
 999         unsigned long tpgt;
1000         int ret;
1001
1002         if (strstr(name, "tpgt_") != name)
1003                 return ERR_PTR(-EINVAL);
1004         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1005                 return ERR_PTR(-EINVAL);
1006
1007         if ((tpgt != 1)) {
1008                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1009                 return ERR_PTR(-ENOSYS);
1010         }
1011
1012         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1013         if (!tpg) {
1014                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1015                 return ERR_PTR(-ENOMEM);
1016         }
1017         tpg->lport = lport;
1018         tpg->lport_tpgt = tpgt;
1019         /*
1020          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1021          * NodeACLs
1022          */
1023         tpg->tpg_attrib.generate_node_acls = 1;
1024         tpg->tpg_attrib.demo_mode_write_protect = 1;
1025         tpg->tpg_attrib.cache_dynamic_acls = 1;
1026         tpg->tpg_attrib.demo_mode_login_only = 1;
1027         tpg->tpg_attrib.jam_host = 0;
1028
1029         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1030         if (ret < 0) {
1031                 kfree(tpg);
1032                 return NULL;
1033         }
1034
1035         lport->tpg_1 = tpg;
1036
1037         return &tpg->se_tpg;
1038 }
1039
1040 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1041 {
1042         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1043                         struct tcm_qla2xxx_tpg, se_tpg);
1044         struct tcm_qla2xxx_lport *lport = tpg->lport;
1045         struct scsi_qla_host *vha = lport->qla_vha;
1046         /*
1047          * Call into qla2x_target.c LLD logic to shutdown the active
1048          * FC Nexuses and disable target mode operation for this qla_hw_data
1049          */
1050         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1051                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1052
1053         core_tpg_deregister(se_tpg);
1054         /*
1055          * Clear local TPG=1 pointer for non NPIV mode.
1056          */
1057         lport->tpg_1 = NULL;
1058         kfree(tpg);
1059 }
1060
1061 static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg,
1062                                     bool enable)
1063 {
1064         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1065         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1066                         struct tcm_qla2xxx_lport, lport_wwn);
1067         struct scsi_qla_host *vha = lport->qla_vha;
1068         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1069                         struct tcm_qla2xxx_tpg, se_tpg);
1070
1071         if (enable) {
1072                 if (atomic_read(&tpg->lport_tpg_enabled))
1073                         return -EEXIST;
1074
1075                 atomic_set(&tpg->lport_tpg_enabled, 1);
1076                 qlt_enable_vha(vha);
1077         } else {
1078                 if (!atomic_read(&tpg->lport_tpg_enabled))
1079                         return 0;
1080
1081                 atomic_set(&tpg->lport_tpg_enabled, 0);
1082                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1083                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1084         }
1085
1086         return 0;
1087 }
1088
1089 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1090                                                          const char *name)
1091 {
1092         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1093                         struct tcm_qla2xxx_lport, lport_wwn);
1094         struct tcm_qla2xxx_tpg *tpg;
1095         unsigned long tpgt;
1096         int ret;
1097
1098         if (strstr(name, "tpgt_") != name)
1099                 return ERR_PTR(-EINVAL);
1100         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1101                 return ERR_PTR(-EINVAL);
1102
1103         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1104         if (!tpg) {
1105                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1106                 return ERR_PTR(-ENOMEM);
1107         }
1108         tpg->lport = lport;
1109         tpg->lport_tpgt = tpgt;
1110
1111         /*
1112          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1113          * NodeACLs
1114          */
1115         tpg->tpg_attrib.generate_node_acls = 1;
1116         tpg->tpg_attrib.demo_mode_write_protect = 1;
1117         tpg->tpg_attrib.cache_dynamic_acls = 1;
1118         tpg->tpg_attrib.demo_mode_login_only = 1;
1119
1120         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1121         if (ret < 0) {
1122                 kfree(tpg);
1123                 return NULL;
1124         }
1125         lport->tpg_1 = tpg;
1126         return &tpg->se_tpg;
1127 }
1128
1129 /*
1130  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1131  */
1132 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1133                                                      const be_id_t s_id)
1134 {
1135         struct tcm_qla2xxx_lport *lport;
1136         struct se_node_acl *se_nacl;
1137         struct tcm_qla2xxx_nacl *nacl;
1138         u32 key;
1139
1140         lport = vha->vha_tgt.target_lport_ptr;
1141         if (!lport) {
1142                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1143                 dump_stack();
1144                 return NULL;
1145         }
1146
1147         key = sid_to_key(s_id);
1148         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1149
1150         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1151         if (!se_nacl) {
1152                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1153                 return NULL;
1154         }
1155         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1156             se_nacl, se_nacl->initiatorname);
1157
1158         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1159         if (!nacl->fc_port) {
1160                 pr_err("Unable to locate struct fc_port\n");
1161                 return NULL;
1162         }
1163
1164         return nacl->fc_port;
1165 }
1166
1167 /*
1168  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1169  */
1170 static void tcm_qla2xxx_set_sess_by_s_id(
1171         struct tcm_qla2xxx_lport *lport,
1172         struct se_node_acl *new_se_nacl,
1173         struct tcm_qla2xxx_nacl *nacl,
1174         struct se_session *se_sess,
1175         struct fc_port *fc_port,
1176         be_id_t s_id)
1177 {
1178         u32 key;
1179         void *slot;
1180         int rc;
1181
1182         key = sid_to_key(s_id);
1183         pr_debug("set_sess_by_s_id: %06x\n", key);
1184
1185         slot = btree_lookup32(&lport->lport_fcport_map, key);
1186         if (!slot) {
1187                 if (new_se_nacl) {
1188                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1189                         nacl->nport_id = key;
1190                         rc = btree_insert32(&lport->lport_fcport_map, key,
1191                                         new_se_nacl, GFP_ATOMIC);
1192                         if (rc)
1193                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1194                                     (int)key);
1195                 } else {
1196                         pr_debug("Wiping nonexisting fc_port entry\n");
1197                 }
1198
1199                 fc_port->se_sess = se_sess;
1200                 nacl->fc_port = fc_port;
1201                 return;
1202         }
1203
1204         if (nacl->fc_port) {
1205                 if (new_se_nacl == NULL) {
1206                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1207                         btree_remove32(&lport->lport_fcport_map, key);
1208                         nacl->fc_port = NULL;
1209                         return;
1210                 }
1211                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1212                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1213                 fc_port->se_sess = se_sess;
1214                 nacl->fc_port = fc_port;
1215                 return;
1216         }
1217
1218         if (new_se_nacl == NULL) {
1219                 pr_debug("Clearing existing fc_port entry\n");
1220                 btree_remove32(&lport->lport_fcport_map, key);
1221                 return;
1222         }
1223
1224         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1225         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1226         fc_port->se_sess = se_sess;
1227         nacl->fc_port = fc_port;
1228
1229         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1230             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1231 }
1232
1233 /*
1234  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1235  */
1236 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1237         scsi_qla_host_t *vha,
1238         const uint16_t loop_id)
1239 {
1240         struct tcm_qla2xxx_lport *lport;
1241         struct se_node_acl *se_nacl;
1242         struct tcm_qla2xxx_nacl *nacl;
1243         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1244
1245         lport = vha->vha_tgt.target_lport_ptr;
1246         if (!lport) {
1247                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1248                 dump_stack();
1249                 return NULL;
1250         }
1251
1252         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1253
1254         fc_loopid = lport->lport_loopid_map + loop_id;
1255         se_nacl = fc_loopid->se_nacl;
1256         if (!se_nacl) {
1257                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1258                     loop_id);
1259                 return NULL;
1260         }
1261
1262         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1263
1264         if (!nacl->fc_port) {
1265                 pr_err("Unable to locate struct fc_port\n");
1266                 return NULL;
1267         }
1268
1269         return nacl->fc_port;
1270 }
1271
1272 /*
1273  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1274  */
1275 static void tcm_qla2xxx_set_sess_by_loop_id(
1276         struct tcm_qla2xxx_lport *lport,
1277         struct se_node_acl *new_se_nacl,
1278         struct tcm_qla2xxx_nacl *nacl,
1279         struct se_session *se_sess,
1280         struct fc_port *fc_port,
1281         uint16_t loop_id)
1282 {
1283         struct se_node_acl *saved_nacl;
1284         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1285
1286         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1287
1288         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1289                         lport->lport_loopid_map)[loop_id];
1290
1291         saved_nacl = fc_loopid->se_nacl;
1292         if (!saved_nacl) {
1293                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1294                 fc_loopid->se_nacl = new_se_nacl;
1295                 if (fc_port->se_sess != se_sess)
1296                         fc_port->se_sess = se_sess;
1297                 if (nacl->fc_port != fc_port)
1298                         nacl->fc_port = fc_port;
1299                 return;
1300         }
1301
1302         if (nacl->fc_port) {
1303                 if (new_se_nacl == NULL) {
1304                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1305                         fc_loopid->se_nacl = NULL;
1306                         nacl->fc_port = NULL;
1307                         return;
1308                 }
1309
1310                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1311                 fc_loopid->se_nacl = new_se_nacl;
1312                 if (fc_port->se_sess != se_sess)
1313                         fc_port->se_sess = se_sess;
1314                 if (nacl->fc_port != fc_port)
1315                         nacl->fc_port = fc_port;
1316                 return;
1317         }
1318
1319         if (new_se_nacl == NULL) {
1320                 pr_debug("Clearing fc_loopid->se_nacl\n");
1321                 fc_loopid->se_nacl = NULL;
1322                 return;
1323         }
1324
1325         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1326         fc_loopid->se_nacl = new_se_nacl;
1327         if (fc_port->se_sess != se_sess)
1328                 fc_port->se_sess = se_sess;
1329         if (nacl->fc_port != fc_port)
1330                 nacl->fc_port = fc_port;
1331
1332         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1333             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1334 }
1335
1336 /*
1337  * Should always be called with qla_hw_data->tgt.sess_lock held.
1338  */
1339 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1340                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1341 {
1342         struct se_session *se_sess = sess->se_sess;
1343
1344         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1345                                      sess, port_id_to_be_id(sess->d_id));
1346         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1347                                 sess, sess->loop_id);
1348 }
1349
1350 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1351 {
1352         struct qla_tgt *tgt = sess->tgt;
1353         struct qla_hw_data *ha = tgt->ha;
1354         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1355         struct se_session *se_sess;
1356         struct tcm_qla2xxx_lport *lport;
1357
1358         se_sess = sess->se_sess;
1359         if (!se_sess) {
1360                 pr_err("struct fc_port->se_sess is NULL\n");
1361                 dump_stack();
1362                 return;
1363         }
1364
1365         lport = vha->vha_tgt.target_lport_ptr;
1366         if (!lport) {
1367                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1368                 dump_stack();
1369                 return;
1370         }
1371         target_wait_for_sess_cmds(se_sess);
1372
1373         target_remove_session(se_sess);
1374 }
1375
1376 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1377                                   struct se_session *se_sess, void *p)
1378 {
1379         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1380                                 struct tcm_qla2xxx_tpg, se_tpg);
1381         struct tcm_qla2xxx_lport *lport = tpg->lport;
1382         struct qla_hw_data *ha = lport->qla_vha->hw;
1383         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1384         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1385                                 struct tcm_qla2xxx_nacl, se_node_acl);
1386         struct fc_port *qlat_sess = p;
1387         uint16_t loop_id = qlat_sess->loop_id;
1388         unsigned long flags;
1389
1390         /*
1391          * And now setup se_nacl and session pointers into HW lport internal
1392          * mappings for fabric S_ID and LOOP_ID.
1393          */
1394         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1395         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1396                                      port_id_to_be_id(qlat_sess->d_id));
1397         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1398                                         se_sess, qlat_sess, loop_id);
1399         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1400
1401         return 0;
1402 }
1403
1404 /*
1405  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1406  * to locate struct se_node_acl
1407  */
1408 static int tcm_qla2xxx_check_initiator_node_acl(
1409         scsi_qla_host_t *vha,
1410         unsigned char *fc_wwpn,
1411         struct fc_port *qlat_sess)
1412 {
1413         struct qla_hw_data *ha = vha->hw;
1414         struct tcm_qla2xxx_lport *lport;
1415         struct tcm_qla2xxx_tpg *tpg;
1416         struct se_session *se_sess;
1417         unsigned char port_name[36];
1418         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1419                        TCM_QLA2XXX_DEFAULT_TAGS;
1420
1421         lport = vha->vha_tgt.target_lport_ptr;
1422         if (!lport) {
1423                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1424                 dump_stack();
1425                 return -EINVAL;
1426         }
1427         /*
1428          * Locate the TPG=1 reference..
1429          */
1430         tpg = lport->tpg_1;
1431         if (!tpg) {
1432                 pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1433                 return -EINVAL;
1434         }
1435         /*
1436          * Format the FCP Initiator port_name into colon seperated values to
1437          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1438          */
1439         memset(&port_name, 0, 36);
1440         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1441         /*
1442          * Locate our struct se_node_acl either from an explict NodeACL created
1443          * via ConfigFS, or via running in TPG demo mode.
1444          */
1445         se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1446                                        sizeof(struct qla_tgt_cmd),
1447                                        TARGET_PROT_ALL, port_name,
1448                                        qlat_sess, tcm_qla2xxx_session_cb);
1449         if (IS_ERR(se_sess))
1450                 return PTR_ERR(se_sess);
1451
1452         return 0;
1453 }
1454
1455 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1456                                     uint16_t loop_id, bool conf_compl_supported)
1457 {
1458         struct qla_tgt *tgt = sess->tgt;
1459         struct qla_hw_data *ha = tgt->ha;
1460         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1461         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1462         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1463         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1464                         struct tcm_qla2xxx_nacl, se_node_acl);
1465         u32 key;
1466
1467
1468         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1469                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1470                     sess, sess->port_name,
1471                     sess->loop_id, loop_id, sess->d_id.b.domain,
1472                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1473                     s_id.b.area, s_id.b.al_pa);
1474
1475         if (sess->loop_id != loop_id) {
1476                 /*
1477                  * Because we can shuffle loop IDs around and we
1478                  * update different sessions non-atomically, we might
1479                  * have overwritten this session's old loop ID
1480                  * already, and we might end up overwriting some other
1481                  * session that will be updated later.  So we have to
1482                  * be extra careful and we can't warn about those things...
1483                  */
1484                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1485                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1486
1487                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1488
1489                 sess->loop_id = loop_id;
1490         }
1491
1492         if (sess->d_id.b24 != s_id.b24) {
1493                 key = (((u32) sess->d_id.b.domain << 16) |
1494                        ((u32) sess->d_id.b.area   <<  8) |
1495                        ((u32) sess->d_id.b.al_pa));
1496
1497                 if (btree_lookup32(&lport->lport_fcport_map, key))
1498                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1499                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1500                             sess->d_id.b.domain, sess->d_id.b.area,
1501                             sess->d_id.b.al_pa);
1502                 else
1503                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1504                              sess->d_id.b.domain, sess->d_id.b.area,
1505                              sess->d_id.b.al_pa);
1506
1507                 key = (((u32) s_id.b.domain << 16) |
1508                        ((u32) s_id.b.area   <<  8) |
1509                        ((u32) s_id.b.al_pa));
1510
1511                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1512                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1513                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1514                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1515                 } else {
1516                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1517                             GFP_ATOMIC);
1518                 }
1519
1520                 sess->d_id = s_id;
1521                 nacl->nport_id = key;
1522         }
1523
1524         sess->conf_compl_supported = conf_compl_supported;
1525
1526 }
1527
1528 /*
1529  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1530  */
1531 static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1532         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1533         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1534         .handle_data            = tcm_qla2xxx_handle_data,
1535         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1536         .get_cmd                = tcm_qla2xxx_get_cmd,
1537         .rel_cmd                = tcm_qla2xxx_rel_cmd,
1538         .free_cmd               = tcm_qla2xxx_free_cmd,
1539         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1540         .free_session           = tcm_qla2xxx_free_session,
1541         .update_sess            = tcm_qla2xxx_update_sess,
1542         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1543         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1544         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1545         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1546         .put_sess               = tcm_qla2xxx_put_sess,
1547         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1548         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1549         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1550 };
1551
1552 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1553 {
1554         int rc;
1555
1556         rc = btree_init32(&lport->lport_fcport_map);
1557         if (rc) {
1558                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1559                 return rc;
1560         }
1561
1562         lport->lport_loopid_map =
1563                 vzalloc(array_size(65536,
1564                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1565         if (!lport->lport_loopid_map) {
1566                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1567                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1568                 btree_destroy32(&lport->lport_fcport_map);
1569                 return -ENOMEM;
1570         }
1571         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1572                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1573         return 0;
1574 }
1575
1576 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1577                                          void *target_lport_ptr,
1578                                          u64 npiv_wwpn, u64 npiv_wwnn)
1579 {
1580         struct qla_hw_data *ha = vha->hw;
1581         struct tcm_qla2xxx_lport *lport =
1582                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1583         /*
1584          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1585          */
1586         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1587         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1588         lport->qla_vha = vha;
1589
1590         return 0;
1591 }
1592
1593 static struct se_wwn *tcm_qla2xxx_make_lport(
1594         struct target_fabric_configfs *tf,
1595         struct config_group *group,
1596         const char *name)
1597 {
1598         struct tcm_qla2xxx_lport *lport;
1599         u64 wwpn;
1600         int ret = -ENODEV;
1601
1602         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1603                 return ERR_PTR(-EINVAL);
1604
1605         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1606         if (!lport) {
1607                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1608                 return ERR_PTR(-ENOMEM);
1609         }
1610         lport->lport_wwpn = wwpn;
1611         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1612                                 wwpn);
1613         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1614
1615         ret = tcm_qla2xxx_init_lport(lport);
1616         if (ret != 0)
1617                 goto out;
1618
1619         ret = qlt_lport_register(lport, wwpn, 0, 0,
1620                                  tcm_qla2xxx_lport_register_cb);
1621         if (ret != 0)
1622                 goto out_lport;
1623
1624         return &lport->lport_wwn;
1625 out_lport:
1626         vfree(lport->lport_loopid_map);
1627         btree_destroy32(&lport->lport_fcport_map);
1628 out:
1629         kfree(lport);
1630         return ERR_PTR(ret);
1631 }
1632
1633 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1634 {
1635         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1636                         struct tcm_qla2xxx_lport, lport_wwn);
1637         struct scsi_qla_host *vha = lport->qla_vha;
1638         struct se_node_acl *node;
1639         u32 key = 0;
1640
1641         /*
1642          * Call into qla2x_target.c LLD logic to complete the
1643          * shutdown of struct qla_tgt after the call to
1644          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1645          */
1646         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1647                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1648
1649         qlt_lport_deregister(vha);
1650
1651         vfree(lport->lport_loopid_map);
1652         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1653                 btree_remove32(&lport->lport_fcport_map, key);
1654         btree_destroy32(&lport->lport_fcport_map);
1655         kfree(lport);
1656 }
1657
1658 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1659                                               void *target_lport_ptr,
1660                                               u64 npiv_wwpn, u64 npiv_wwnn)
1661 {
1662         struct fc_vport *vport;
1663         struct Scsi_Host *sh = base_vha->host;
1664         struct scsi_qla_host *npiv_vha;
1665         struct tcm_qla2xxx_lport *lport =
1666                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1667         struct tcm_qla2xxx_lport *base_lport =
1668                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1669         struct fc_vport_identifiers vport_id;
1670
1671         if (qla_ini_mode_enabled(base_vha)) {
1672                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1673                 return -EPERM;
1674         }
1675
1676         if (!base_lport || !base_lport->tpg_1 ||
1677             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1678                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1679                 return -EPERM;
1680         }
1681
1682         memset(&vport_id, 0, sizeof(vport_id));
1683         vport_id.port_name = npiv_wwpn;
1684         vport_id.node_name = npiv_wwnn;
1685         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1686         vport_id.vport_type = FC_PORTTYPE_NPIV;
1687         vport_id.disable = false;
1688
1689         vport = fc_vport_create(sh, 0, &vport_id);
1690         if (!vport) {
1691                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1692                 return -ENODEV;
1693         }
1694         /*
1695          * Setup local pointer to NPIV vhba + target_lport_ptr
1696          */
1697         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1698         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1699         lport->qla_vha = npiv_vha;
1700         scsi_host_get(npiv_vha->host);
1701         return 0;
1702 }
1703
1704
1705 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1706         struct target_fabric_configfs *tf,
1707         struct config_group *group,
1708         const char *name)
1709 {
1710         struct tcm_qla2xxx_lport *lport;
1711         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1712         char *p, tmp[128];
1713         int ret;
1714
1715         snprintf(tmp, 128, "%s", name);
1716
1717         p = strchr(tmp, '@');
1718         if (!p) {
1719                 pr_err("Unable to locate NPIV '@' separator\n");
1720                 return ERR_PTR(-EINVAL);
1721         }
1722         *p++ = '\0';
1723
1724         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1725                 return ERR_PTR(-EINVAL);
1726
1727         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1728                                        &npiv_wwpn, &npiv_wwnn) < 0)
1729                 return ERR_PTR(-EINVAL);
1730
1731         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1732         if (!lport) {
1733                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1734                 return ERR_PTR(-ENOMEM);
1735         }
1736         lport->lport_npiv_wwpn = npiv_wwpn;
1737         lport->lport_npiv_wwnn = npiv_wwnn;
1738         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1739
1740         ret = tcm_qla2xxx_init_lport(lport);
1741         if (ret != 0)
1742                 goto out;
1743
1744         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1745                                  tcm_qla2xxx_lport_register_npiv_cb);
1746         if (ret != 0)
1747                 goto out_lport;
1748
1749         return &lport->lport_wwn;
1750 out_lport:
1751         vfree(lport->lport_loopid_map);
1752         btree_destroy32(&lport->lport_fcport_map);
1753 out:
1754         kfree(lport);
1755         return ERR_PTR(ret);
1756 }
1757
1758 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1759 {
1760         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1761                         struct tcm_qla2xxx_lport, lport_wwn);
1762         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1763         struct qla_hw_data *ha = npiv_vha->hw;
1764         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1765
1766         scsi_host_put(npiv_vha->host);
1767         /*
1768          * Notify libfc that we want to release the vha->fc_vport
1769          */
1770         fc_vport_terminate(npiv_vha->fc_vport);
1771         scsi_host_put(base_vha->host);
1772         kfree(lport);
1773 }
1774
1775
1776 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1777                 char *page)
1778 {
1779         return sprintf(page,
1780             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1781             QLA2XXX_VERSION, utsname()->sysname,
1782             utsname()->machine, utsname()->release);
1783 }
1784
1785 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1786
1787 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1788         &tcm_qla2xxx_wwn_attr_version,
1789         NULL,
1790 };
1791
1792 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1793         .module                         = THIS_MODULE,
1794         .fabric_name                    = "qla2xxx",
1795         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1796         /*
1797          * XXX: Limit assumes single page per scatter-gather-list entry.
1798          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1799          */
1800         .max_data_sg_nents              = 1200,
1801         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1802         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1803         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1804         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1805         .tpg_check_demo_mode_write_protect =
1806                                         tcm_qla2xxx_check_demo_write_protect,
1807         .tpg_check_prod_mode_write_protect =
1808                                         tcm_qla2xxx_check_prod_write_protect,
1809         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1810         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1811         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1812         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1813         .release_cmd                    = tcm_qla2xxx_release_cmd,
1814         .close_session                  = tcm_qla2xxx_close_session,
1815         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1816         .sess_get_initiator_sid         = NULL,
1817         .write_pending                  = tcm_qla2xxx_write_pending,
1818         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1819         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1820         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1821         .queue_status                   = tcm_qla2xxx_queue_status,
1822         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1823         .aborted_task                   = tcm_qla2xxx_aborted_task,
1824         /*
1825          * Setup function pointers for generic logic in
1826          * target_core_fabric_configfs.c
1827          */
1828         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1829         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1830         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1831         .fabric_enable_tpg              = tcm_qla2xxx_enable_tpg,
1832         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1833         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1834
1835         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1836         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1837         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1838 };
1839
1840 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1841         .module                         = THIS_MODULE,
1842         .fabric_name                    = "qla2xxx_npiv",
1843         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1844         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1845         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1846         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1847         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1848         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1849         .tpg_check_prod_mode_write_protect =
1850             tcm_qla2xxx_check_prod_write_protect,
1851         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1852         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1853         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1854         .release_cmd                    = tcm_qla2xxx_release_cmd,
1855         .close_session                  = tcm_qla2xxx_close_session,
1856         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1857         .sess_get_initiator_sid         = NULL,
1858         .write_pending                  = tcm_qla2xxx_write_pending,
1859         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1860         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1861         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1862         .queue_status                   = tcm_qla2xxx_queue_status,
1863         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1864         .aborted_task                   = tcm_qla2xxx_aborted_task,
1865         /*
1866          * Setup function pointers for generic logic in
1867          * target_core_fabric_configfs.c
1868          */
1869         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1870         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1871         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1872         .fabric_enable_tpg              = tcm_qla2xxx_npiv_enable_tpg,
1873         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1874         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1875
1876         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1877 };
1878
1879 static int tcm_qla2xxx_register_configfs(void)
1880 {
1881         int ret;
1882
1883         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1884             QLA2XXX_VERSION, utsname()->sysname,
1885             utsname()->machine, utsname()->release);
1886
1887         ret = target_register_template(&tcm_qla2xxx_ops);
1888         if (ret)
1889                 return ret;
1890
1891         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1892         if (ret)
1893                 goto out_fabric;
1894
1895         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1896                                                 WQ_MEM_RECLAIM, 0);
1897         if (!tcm_qla2xxx_free_wq) {
1898                 ret = -ENOMEM;
1899                 goto out_fabric_npiv;
1900         }
1901
1902         return 0;
1903
1904 out_fabric_npiv:
1905         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1906 out_fabric:
1907         target_unregister_template(&tcm_qla2xxx_ops);
1908         return ret;
1909 }
1910
1911 static void tcm_qla2xxx_deregister_configfs(void)
1912 {
1913         destroy_workqueue(tcm_qla2xxx_free_wq);
1914
1915         target_unregister_template(&tcm_qla2xxx_ops);
1916         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1917 }
1918
1919 static int __init tcm_qla2xxx_init(void)
1920 {
1921         int ret;
1922
1923         BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1924         BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1925         BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1926         BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1927         BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1928         BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1929         BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1930         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1931         BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1932         BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1933         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1934         BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1935         BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1936         BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1937
1938         ret = tcm_qla2xxx_register_configfs();
1939         if (ret < 0)
1940                 return ret;
1941
1942         return 0;
1943 }
1944
1945 static void __exit tcm_qla2xxx_exit(void)
1946 {
1947         tcm_qla2xxx_deregister_configfs();
1948 }
1949
1950 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1951 MODULE_LICENSE("GPL");
1952 module_init(tcm_qla2xxx_init);
1953 module_exit(tcm_qla2xxx_exit);