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
 259         cmd->cmd_in_wq = 0;
 260
 261         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 262
 263         /* To do: protect all tgt_counters manipulations with proper locking. */
 264         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 265         cmd->trc_flags |= TRC_CMD_FREE;
 266         cmd->cmd_sent_to_fw = 0;
 267
 268         transport_generic_free_cmd(&cmd->se_cmd, 0);
 269 }
 270
 271 /*
 272  * Called from qla_target_template->free_cmd(), and will call
 273  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 274  * release callback.  qla_hw_data->hardware_lock is expected to be held
 275  */
 276 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 277 {
 278         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 279         cmd->cmd_in_wq = 1;
 280
 281         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 282         cmd->trc_flags |= TRC_CMD_DONE;
 283
 284         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 285         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 286 }
 287
 288 /*
 289  * Called from struct target_core_fabric_ops->check_stop_free() context
 290  */
 291 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 292 {
 293         struct qla_tgt_cmd *cmd;
 294
 295         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 296                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 297                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 298         }
 299
 300         return target_put_sess_cmd(se_cmd);
 301 }
 302
 303 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 304  * fabric descriptor @se_cmd command to release
 305  */
 306 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 307 {
 308         struct qla_tgt_cmd *cmd;
 309
 310         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 311                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 312                                 struct qla_tgt_mgmt_cmd, se_cmd);
 313                 qlt_free_mcmd(mcmd);
 314                 return;
 315         }
 316         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 317
 318         if (WARN_ON(cmd->cmd_sent_to_fw))
 319                 return;
 320
 321         qlt_free_cmd(cmd);
 322 }
 323
 324 static void tcm_qla2xxx_release_session(struct kref *kref)
 325 {
 326         struct fc_port  *sess = container_of(kref,
 327             struct fc_port, sess_kref);
 328
 329         qlt_unreg_sess(sess);
 330 }
 331
 332 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 333 {
 334         if (!sess)
 335                 return;
 336
 337         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 338 }
 339
 340 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 341 {
 342         struct fc_port *sess = se_sess->fabric_sess_ptr;
 343         struct scsi_qla_host *vha;
 344         unsigned long flags;
 345
 346         BUG_ON(!sess);
 347         vha = sess->vha;
 348
 349         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 350         target_sess_cmd_list_set_waiting(se_sess);
 351         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 352
 353         sess->explicit_logout = 1;
 354         tcm_qla2xxx_put_sess(sess);
 355 }
 356
 357 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 358 {
 359         return 0;
 360 }
 361
 362 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 363 {
 364         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 365                                 struct qla_tgt_cmd, se_cmd);
 366
 367         if (cmd->aborted) {
 368                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 369                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 370                  * already kick start the free.
 371                  */
 372                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 373                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 374                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 375                         cmd->se_cmd.transport_state,
 376                         cmd->se_cmd.t_state,
 377                         cmd->se_cmd.se_cmd_flags);
 378                 transport_generic_request_failure(&cmd->se_cmd,
 379                         TCM_CHECK_CONDITION_ABORT_CMD);
 380                 return 0;
 381         }
 382         cmd->trc_flags |= TRC_XFR_RDY;
 383         cmd->bufflen = se_cmd->data_length;
 384         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 385
 386         cmd->sg_cnt = se_cmd->t_data_nents;
 387         cmd->sg = se_cmd->t_data_sg;
 388
 389         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 390         cmd->prot_sg = se_cmd->t_prot_sg;
 391         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 392         se_cmd->pi_err = 0;
 393
 394         /*
 395          * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
 396          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 397          */
 398         return qlt_rdy_to_xfer(cmd);
 399 }
 400
 401 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 402 {
 403         return;
 404 }
 405
 406 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 407 {
 408         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 409                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 410                                 struct qla_tgt_cmd, se_cmd);
 411                 return cmd->state;
 412         }
 413
 414         return 0;
 415 }
 416
 417 /*
 418  * Called from process context in qla_target.c:qlt_do_work() code
 419  */
 420 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 421         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 422         int data_dir, int bidi)
 423 {
 424         struct se_cmd *se_cmd = &cmd->se_cmd;
 425         struct se_session *se_sess;
 426         struct fc_port *sess;
 427 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 428         struct se_portal_group *se_tpg;
 429         struct tcm_qla2xxx_tpg *tpg;
 430 #endif
 431         int flags = TARGET_SCF_ACK_KREF;
 432
 433         if (bidi)
 434                 flags |= TARGET_SCF_BIDI_OP;
 435
 436         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 437                 flags |= TARGET_SCF_USE_CPUID;
 438
 439         sess = cmd->sess;
 440         if (!sess) {
 441                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 442                 return -EINVAL;
 443         }
 444
 445         se_sess = sess->se_sess;
 446         if (!se_sess) {
 447                 pr_err("Unable to locate active struct se_session\n");
 448                 return -EINVAL;
 449         }
 450
 451 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 452         se_tpg = se_sess->se_tpg;
 453         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 454         if (unlikely(tpg->tpg_attrib.jam_host)) {
 455                 /* return, and dont run target_submit_cmd,discarding command */
 456                 return 0;
 457         }
 458 #endif
 459
 460         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 461         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 462                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 463                                 data_dir, flags);
 464 }
 465
 466 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 467 {
 468         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 469
 470         /*
 471          * Ensure that the complete FCP WRITE payload has been received.
 472          * Otherwise return an exception via CHECK_CONDITION status.
 473          */
 474         cmd->cmd_in_wq = 0;
 475         cmd->cmd_sent_to_fw = 0;
 476         if (cmd->aborted) {
 477                 transport_generic_request_failure(&cmd->se_cmd,
 478                         TCM_CHECK_CONDITION_ABORT_CMD);
 479                 return;
 480         }
 481
 482         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 483         if (!cmd->write_data_transferred) {
 484                 switch (cmd->dif_err_code) {
 485                 case DIF_ERR_GRD:
 486                         cmd->se_cmd.pi_err =
 487                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 488                         break;
 489                 case DIF_ERR_REF:
 490                         cmd->se_cmd.pi_err =
 491                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 492                         break;
 493                 case DIF_ERR_APP:
 494                         cmd->se_cmd.pi_err =
 495                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 496                         break;
 497                 case DIF_ERR_NONE:
 498                 default:
 499                         break;
 500                 }
 501
 502                 if (cmd->se_cmd.pi_err)
 503                         transport_generic_request_failure(&cmd->se_cmd,
 504                                 cmd->se_cmd.pi_err);
 505                 else
 506                         transport_generic_request_failure(&cmd->se_cmd,
 507                                 TCM_CHECK_CONDITION_ABORT_CMD);
 508
 509                 return;
 510         }
 511
 512         return target_execute_cmd(&cmd->se_cmd);
 513 }
 514
 515 /*
 516  * Called from qla_target.c:qlt_do_ctio_completion()
 517  */
 518 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 519 {
 520         cmd->trc_flags |= TRC_DATA_IN;
 521         cmd->cmd_in_wq = 1;
 522         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 523         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 524 }
 525
 526 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 527 {
 528         return 0;
 529 }
 530
 531 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 532     uint16_t *pfw_prot_opts)
 533 {
 534         struct se_cmd *se_cmd = &cmd->se_cmd;
 535
 536         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 537                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 538
 539         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 540                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * Called from qla_target.c:qlt_issue_task_mgmt()
 547  */
 548 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 549         uint16_t tmr_func, uint32_t tag)
 550 {
 551         struct fc_port *sess = mcmd->sess;
 552         struct se_cmd *se_cmd = &mcmd->se_cmd;
 553         int transl_tmr_func = 0;
 554         int flags = TARGET_SCF_ACK_KREF;
 555
 556         switch (tmr_func) {
 557         case QLA_TGT_ABTS:
 558                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 559                 transl_tmr_func = TMR_ABORT_TASK;
 560                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 561                 break;
 562         case QLA_TGT_2G_ABORT_TASK:
 563                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 564                 transl_tmr_func = TMR_ABORT_TASK;
 565                 break;
 566         case QLA_TGT_CLEAR_ACA:
 567                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 568                 transl_tmr_func = TMR_CLEAR_ACA;
 569                 break;
 570         case QLA_TGT_TARGET_RESET:
 571                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 572                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 573                 break;
 574         case QLA_TGT_LUN_RESET:
 575                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 576                 transl_tmr_func = TMR_LUN_RESET;
 577                 break;
 578         case QLA_TGT_CLEAR_TS:
 579                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 580                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 581                 break;
 582         case QLA_TGT_ABORT_TS:
 583                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 584                 transl_tmr_func = TMR_ABORT_TASK_SET;
 585                 break;
 586         default:
 587                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 588                     sess->vha->host_no, tmr_func);
 589                 return -ENOSYS;
 590         }
 591
 592         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 593             transl_tmr_func, GFP_ATOMIC, tag, flags);
 594 }
 595
 596 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 597     uint64_t tag)
 598 {
 599         struct qla_tgt_cmd *cmd = NULL;
 600         struct se_cmd *secmd;
 601         unsigned long flags;
 602
 603         if (!sess->se_sess)
 604                 return NULL;
 605
 606         spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags);
 607         list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) {
 608                 /* skip task management functions, including tmr->task_cmd */
 609                 if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 610                         continue;
 611
 612                 if (secmd->tag == tag) {
 613                         cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd);
 614                         break;
 615                 }
 616         }
 617         spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags);
 618
 619         return cmd;
 620 }
 621
 622 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 623 {
 624         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 625                                 struct qla_tgt_cmd, se_cmd);
 626
 627         if (cmd->aborted) {
 628                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 629                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 630                  * already kick start the free.
 631                  */
 632                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 633                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 634                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 635                         cmd->se_cmd.transport_state,
 636                         cmd->se_cmd.t_state,
 637                         cmd->se_cmd.se_cmd_flags);
 638                 return 0;
 639         }
 640
 641         cmd->trc_flags |= TRC_XMIT_DATA;
 642         cmd->bufflen = se_cmd->data_length;
 643         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 644
 645         cmd->sg_cnt = se_cmd->t_data_nents;
 646         cmd->sg = se_cmd->t_data_sg;
 647         cmd->offset = 0;
 648
 649         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 650         cmd->prot_sg = se_cmd->t_prot_sg;
 651         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 652         se_cmd->pi_err = 0;
 653
 654         /*
 655          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 656          */
 657         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 658                                 se_cmd->scsi_status);
 659 }
 660
 661 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 662 {
 663         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 664                                 struct qla_tgt_cmd, se_cmd);
 665         int xmit_type = QLA_TGT_XMIT_STATUS;
 666
 667         if (cmd->aborted) {
 668                 /*
 669                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 670                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 671                  * already kick start the free.
 672                  */
 673                 pr_debug(
 674                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 675                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 676                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 677                     cmd->se_cmd.se_cmd_flags);
 678                 return 0;
 679         }
 680         cmd->bufflen = se_cmd->data_length;
 681         cmd->sg = NULL;
 682         cmd->sg_cnt = 0;
 683         cmd->offset = 0;
 684         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 685         cmd->trc_flags |= TRC_XMIT_STATUS;
 686
 687         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 688                 /*
 689                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 690                  * for qla_tgt_xmit_response LLD code
 691                  */
 692                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 693                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 694                         se_cmd->residual_count = 0;
 695                 }
 696                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 697                 se_cmd->residual_count += se_cmd->data_length;
 698
 699                 cmd->bufflen = 0;
 700         }
 701         /*
 702          * Now queue status response to qla2xxx LLD code and response ring
 703          */
 704         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 705 }
 706
 707 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 708 {
 709         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 710         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 711                                 struct qla_tgt_mgmt_cmd, se_cmd);
 712
 713         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 714                         mcmd, se_tmr->function, se_tmr->response);
 715         /*
 716          * Do translation between TCM TM response codes and
 717          * QLA2xxx FC TM response codes.
 718          */
 719         switch (se_tmr->response) {
 720         case TMR_FUNCTION_COMPLETE:
 721                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 722                 break;
 723         case TMR_TASK_DOES_NOT_EXIST:
 724                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 725                 break;
 726         case TMR_FUNCTION_REJECTED:
 727                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 728                 break;
 729         case TMR_LUN_DOES_NOT_EXIST:
 730         default:
 731                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 732                 break;
 733         }
 734         /*
 735          * Queue the TM response to QLA2xxx LLD to build a
 736          * CTIO response packet.
 737          */
 738         qlt_xmit_tm_rsp(mcmd);
 739 }
 740
 741 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 742 {
 743         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 744                                 struct qla_tgt_cmd, se_cmd);
 745
 746         if (qlt_abort_cmd(cmd))
 747                 return;
 748 }
 749
 750 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 751                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 752 /*
 753  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 754  */
 755 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 756 {
 757         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 758         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 759         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 760         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 761                                 struct tcm_qla2xxx_lport, lport_wwn);
 762         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 763                                 struct tcm_qla2xxx_nacl, se_node_acl);
 764         void *node;
 765
 766         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 767
 768         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 769         if (WARN_ON(node && (node != se_nacl))) {
 770                 /*
 771                  * The nacl no longer matches what we think it should be.
 772                  * Most likely a new dynamic acl has been added while
 773                  * someone dropped the hardware lock.  It clearly is a
 774                  * bug elsewhere, but this bit can't make things worse.
 775                  */
 776                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 777                                node, GFP_ATOMIC);
 778         }
 779
 780         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 781             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 782         /*
 783          * Now clear the se_nacl and session pointers from our HW lport lookup
 784          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 785          *
 786          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 787          * target_wait_for_sess_cmds() before the session waits for outstanding
 788          * I/O to complete, to avoid a race between session shutdown execution
 789          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 790          */
 791         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 792 }
 793
 794 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 795 {
 796         target_sess_cmd_list_set_waiting(sess->se_sess);
 797 }
 798
 799 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 800                 const char *name)
 801 {
 802         struct tcm_qla2xxx_nacl *nacl =
 803                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 804         u64 wwnn;
 805
 806         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 807                 return -EINVAL;
 808
 809         nacl->nport_wwnn = wwnn;
 810         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 811
 812         return 0;
 813 }
 814
 815 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 816
 817 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 818                                                                         \
 819 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 820                 struct config_item *item, char *page)                   \
 821 {                                                                       \
 822         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 823         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 824                         struct tcm_qla2xxx_tpg, se_tpg);                \
 825                                                                         \
 826         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 827 }                                                                       \
 828                                                                         \
 829 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 830                 struct config_item *item, const char *page, size_t count) \
 831 {                                                                       \
 832         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 833         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 834                         struct tcm_qla2xxx_tpg, se_tpg);                \
 835         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 836         unsigned long val;                                              \
 837         int ret;                                                        \
 838                                                                         \
 839         ret = kstrtoul(page, 0, &val);                                  \
 840         if (ret < 0) {                                                  \
 841                 pr_err("kstrtoul() failed with"                         \
 842                                 " ret: %d\n", ret);                     \
 843                 return -EINVAL;                                         \
 844         }                                                               \
 845                                                                         \
 846         if ((val != 0) && (val != 1)) {                                 \
 847                 pr_err("Illegal boolean value %lu\n", val);             \
 848                 return -EINVAL;                                         \
 849         }                                                               \
 850                                                                         \
 851         a->name = val;                                                  \
 852                                                                         \
 853         return count;                                                   \
 854 }                                                                       \
 855 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 856
 857 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 858 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 859 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 860 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 861 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 862 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 863 DEF_QLA_TPG_ATTRIB(jam_host);
 864 #endif
 865
 866 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 867         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 868         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 869         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 870         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 871         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 872 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 873         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 874 #endif
 875         NULL,
 876 };
 877
 878 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 879
 880 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 881                 char *page)
 882 {
 883         struct se_portal_group *se_tpg = to_tpg(item);
 884         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 885                         struct tcm_qla2xxx_tpg, se_tpg);
 886
 887         return snprintf(page, PAGE_SIZE, "%d\n",
 888                         atomic_read(&tpg->lport_tpg_enabled));
 889 }
 890
 891 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 892                 const char *page, size_t count)
 893 {
 894         struct se_portal_group *se_tpg = to_tpg(item);
 895         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 896         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 897                         struct tcm_qla2xxx_lport, lport_wwn);
 898         struct scsi_qla_host *vha = lport->qla_vha;
 899         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 900                         struct tcm_qla2xxx_tpg, se_tpg);
 901         unsigned long op;
 902         int rc;
 903
 904         rc = kstrtoul(page, 0, &op);
 905         if (rc < 0) {
 906                 pr_err("kstrtoul() returned %d\n", rc);
 907                 return -EINVAL;
 908         }
 909         if ((op != 1) && (op != 0)) {
 910                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 911                 return -EINVAL;
 912         }
 913         if (op) {
 914                 if (atomic_read(&tpg->lport_tpg_enabled))
 915                         return -EEXIST;
 916
 917                 atomic_set(&tpg->lport_tpg_enabled, 1);
 918                 qlt_enable_vha(vha);
 919         } else {
 920                 if (!atomic_read(&tpg->lport_tpg_enabled))
 921                         return count;
 922
 923                 atomic_set(&tpg->lport_tpg_enabled, 0);
 924                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 925                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 926         }
 927
 928         return count;
 929 }
 930
 931 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 932                 char *page)
 933 {
 934         return target_show_dynamic_sessions(to_tpg(item), page);
 935 }
 936
 937 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 938                 const char *page, size_t count)
 939 {
 940         struct se_portal_group *se_tpg = to_tpg(item);
 941         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 942                                 struct tcm_qla2xxx_tpg, se_tpg);
 943         unsigned long val;
 944         int ret = kstrtoul(page, 0, &val);
 945
 946         if (ret) {
 947                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 948                 return ret;
 949         }
 950         if (val != 0 && val != 1 && val != 3) {
 951                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 952                 return -EINVAL;
 953         }
 954         tpg->tpg_attrib.fabric_prot_type = val;
 955
 956         return count;
 957 }
 958
 959 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 960                 char *page)
 961 {
 962         struct se_portal_group *se_tpg = to_tpg(item);
 963         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 964                                 struct tcm_qla2xxx_tpg, se_tpg);
 965
 966         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 967 }
 968
 969 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
 970 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 971 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 972
 973 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 974         &tcm_qla2xxx_tpg_attr_enable,
 975         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
 976         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
 977         NULL,
 978 };
 979
 980 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
 981                                                     const char *name)
 982 {
 983         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 984                         struct tcm_qla2xxx_lport, lport_wwn);
 985         struct tcm_qla2xxx_tpg *tpg;
 986         unsigned long tpgt;
 987         int ret;
 988
 989         if (strstr(name, "tpgt_") != name)
 990                 return ERR_PTR(-EINVAL);
 991         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
 992                 return ERR_PTR(-EINVAL);
 993
 994         if ((tpgt != 1)) {
 995                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
 996                 return ERR_PTR(-ENOSYS);
 997         }
 998
 999         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1000         if (!tpg) {
1001                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1002                 return ERR_PTR(-ENOMEM);
1003         }
1004         tpg->lport = lport;
1005         tpg->lport_tpgt = tpgt;
1006         /*
1007          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1008          * NodeACLs
1009          */
1010         tpg->tpg_attrib.generate_node_acls = 1;
1011         tpg->tpg_attrib.demo_mode_write_protect = 1;
1012         tpg->tpg_attrib.cache_dynamic_acls = 1;
1013         tpg->tpg_attrib.demo_mode_login_only = 1;
1014         tpg->tpg_attrib.jam_host = 0;
1015
1016         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1017         if (ret < 0) {
1018                 kfree(tpg);
1019                 return NULL;
1020         }
1021
1022         lport->tpg_1 = tpg;
1023
1024         return &tpg->se_tpg;
1025 }
1026
1027 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1028 {
1029         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1030                         struct tcm_qla2xxx_tpg, se_tpg);
1031         struct tcm_qla2xxx_lport *lport = tpg->lport;
1032         struct scsi_qla_host *vha = lport->qla_vha;
1033         /*
1034          * Call into qla2x_target.c LLD logic to shutdown the active
1035          * FC Nexuses and disable target mode operation for this qla_hw_data
1036          */
1037         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1038                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1039
1040         core_tpg_deregister(se_tpg);
1041         /*
1042          * Clear local TPG=1 pointer for non NPIV mode.
1043          */
1044         lport->tpg_1 = NULL;
1045         kfree(tpg);
1046 }
1047
1048 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1049                 char *page)
1050 {
1051         return tcm_qla2xxx_tpg_enable_show(item, page);
1052 }
1053
1054 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1055                 const char *page, size_t count)
1056 {
1057         struct se_portal_group *se_tpg = to_tpg(item);
1058         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1059         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1060                         struct tcm_qla2xxx_lport, lport_wwn);
1061         struct scsi_qla_host *vha = lport->qla_vha;
1062         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1063                         struct tcm_qla2xxx_tpg, se_tpg);
1064         unsigned long op;
1065         int rc;
1066
1067         rc = kstrtoul(page, 0, &op);
1068         if (rc < 0) {
1069                 pr_err("kstrtoul() returned %d\n", rc);
1070                 return -EINVAL;
1071         }
1072         if ((op != 1) && (op != 0)) {
1073                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1074                 return -EINVAL;
1075         }
1076         if (op) {
1077                 if (atomic_read(&tpg->lport_tpg_enabled))
1078                         return -EEXIST;
1079
1080                 atomic_set(&tpg->lport_tpg_enabled, 1);
1081                 qlt_enable_vha(vha);
1082         } else {
1083                 if (!atomic_read(&tpg->lport_tpg_enabled))
1084                         return count;
1085
1086                 atomic_set(&tpg->lport_tpg_enabled, 0);
1087                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1088                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1089         }
1090
1091         return count;
1092 }
1093
1094 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1095
1096 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1097         &tcm_qla2xxx_npiv_tpg_attr_enable,
1098         NULL,
1099 };
1100
1101 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1102                                                          const char *name)
1103 {
1104         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1105                         struct tcm_qla2xxx_lport, lport_wwn);
1106         struct tcm_qla2xxx_tpg *tpg;
1107         unsigned long tpgt;
1108         int ret;
1109
1110         if (strstr(name, "tpgt_") != name)
1111                 return ERR_PTR(-EINVAL);
1112         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1113                 return ERR_PTR(-EINVAL);
1114
1115         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1116         if (!tpg) {
1117                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1118                 return ERR_PTR(-ENOMEM);
1119         }
1120         tpg->lport = lport;
1121         tpg->lport_tpgt = tpgt;
1122
1123         /*
1124          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1125          * NodeACLs
1126          */
1127         tpg->tpg_attrib.generate_node_acls = 1;
1128         tpg->tpg_attrib.demo_mode_write_protect = 1;
1129         tpg->tpg_attrib.cache_dynamic_acls = 1;
1130         tpg->tpg_attrib.demo_mode_login_only = 1;
1131
1132         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1133         if (ret < 0) {
1134                 kfree(tpg);
1135                 return NULL;
1136         }
1137         lport->tpg_1 = tpg;
1138         return &tpg->se_tpg;
1139 }
1140
1141 /*
1142  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1143  */
1144 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1145                                                      const be_id_t s_id)
1146 {
1147         struct tcm_qla2xxx_lport *lport;
1148         struct se_node_acl *se_nacl;
1149         struct tcm_qla2xxx_nacl *nacl;
1150         u32 key;
1151
1152         lport = vha->vha_tgt.target_lport_ptr;
1153         if (!lport) {
1154                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1155                 dump_stack();
1156                 return NULL;
1157         }
1158
1159         key = sid_to_key(s_id);
1160         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1161
1162         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1163         if (!se_nacl) {
1164                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1165                 return NULL;
1166         }
1167         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1168             se_nacl, se_nacl->initiatorname);
1169
1170         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1171         if (!nacl->fc_port) {
1172                 pr_err("Unable to locate struct fc_port\n");
1173                 return NULL;
1174         }
1175
1176         return nacl->fc_port;
1177 }
1178
1179 /*
1180  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1181  */
1182 static void tcm_qla2xxx_set_sess_by_s_id(
1183         struct tcm_qla2xxx_lport *lport,
1184         struct se_node_acl *new_se_nacl,
1185         struct tcm_qla2xxx_nacl *nacl,
1186         struct se_session *se_sess,
1187         struct fc_port *fc_port,
1188         be_id_t s_id)
1189 {
1190         u32 key;
1191         void *slot;
1192         int rc;
1193
1194         key = sid_to_key(s_id);
1195         pr_debug("set_sess_by_s_id: %06x\n", key);
1196
1197         slot = btree_lookup32(&lport->lport_fcport_map, key);
1198         if (!slot) {
1199                 if (new_se_nacl) {
1200                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1201                         nacl->nport_id = key;
1202                         rc = btree_insert32(&lport->lport_fcport_map, key,
1203                                         new_se_nacl, GFP_ATOMIC);
1204                         if (rc)
1205                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1206                                     (int)key);
1207                 } else {
1208                         pr_debug("Wiping nonexisting fc_port entry\n");
1209                 }
1210
1211                 fc_port->se_sess = se_sess;
1212                 nacl->fc_port = fc_port;
1213                 return;
1214         }
1215
1216         if (nacl->fc_port) {
1217                 if (new_se_nacl == NULL) {
1218                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1219                         btree_remove32(&lport->lport_fcport_map, key);
1220                         nacl->fc_port = NULL;
1221                         return;
1222                 }
1223                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1224                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1225                 fc_port->se_sess = se_sess;
1226                 nacl->fc_port = fc_port;
1227                 return;
1228         }
1229
1230         if (new_se_nacl == NULL) {
1231                 pr_debug("Clearing existing fc_port entry\n");
1232                 btree_remove32(&lport->lport_fcport_map, key);
1233                 return;
1234         }
1235
1236         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1237         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1238         fc_port->se_sess = se_sess;
1239         nacl->fc_port = fc_port;
1240
1241         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1242             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1243 }
1244
1245 /*
1246  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1247  */
1248 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1249         scsi_qla_host_t *vha,
1250         const uint16_t loop_id)
1251 {
1252         struct tcm_qla2xxx_lport *lport;
1253         struct se_node_acl *se_nacl;
1254         struct tcm_qla2xxx_nacl *nacl;
1255         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1256
1257         lport = vha->vha_tgt.target_lport_ptr;
1258         if (!lport) {
1259                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1260                 dump_stack();
1261                 return NULL;
1262         }
1263
1264         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1265
1266         fc_loopid = lport->lport_loopid_map + loop_id;
1267         se_nacl = fc_loopid->se_nacl;
1268         if (!se_nacl) {
1269                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1270                     loop_id);
1271                 return NULL;
1272         }
1273
1274         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1275
1276         if (!nacl->fc_port) {
1277                 pr_err("Unable to locate struct fc_port\n");
1278                 return NULL;
1279         }
1280
1281         return nacl->fc_port;
1282 }
1283
1284 /*
1285  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1286  */
1287 static void tcm_qla2xxx_set_sess_by_loop_id(
1288         struct tcm_qla2xxx_lport *lport,
1289         struct se_node_acl *new_se_nacl,
1290         struct tcm_qla2xxx_nacl *nacl,
1291         struct se_session *se_sess,
1292         struct fc_port *fc_port,
1293         uint16_t loop_id)
1294 {
1295         struct se_node_acl *saved_nacl;
1296         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1297
1298         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1299
1300         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1301                         lport->lport_loopid_map)[loop_id];
1302
1303         saved_nacl = fc_loopid->se_nacl;
1304         if (!saved_nacl) {
1305                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1306                 fc_loopid->se_nacl = new_se_nacl;
1307                 if (fc_port->se_sess != se_sess)
1308                         fc_port->se_sess = se_sess;
1309                 if (nacl->fc_port != fc_port)
1310                         nacl->fc_port = fc_port;
1311                 return;
1312         }
1313
1314         if (nacl->fc_port) {
1315                 if (new_se_nacl == NULL) {
1316                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1317                         fc_loopid->se_nacl = NULL;
1318                         nacl->fc_port = NULL;
1319                         return;
1320                 }
1321
1322                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1323                 fc_loopid->se_nacl = new_se_nacl;
1324                 if (fc_port->se_sess != se_sess)
1325                         fc_port->se_sess = se_sess;
1326                 if (nacl->fc_port != fc_port)
1327                         nacl->fc_port = fc_port;
1328                 return;
1329         }
1330
1331         if (new_se_nacl == NULL) {
1332                 pr_debug("Clearing fc_loopid->se_nacl\n");
1333                 fc_loopid->se_nacl = NULL;
1334                 return;
1335         }
1336
1337         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1338         fc_loopid->se_nacl = new_se_nacl;
1339         if (fc_port->se_sess != se_sess)
1340                 fc_port->se_sess = se_sess;
1341         if (nacl->fc_port != fc_port)
1342                 nacl->fc_port = fc_port;
1343
1344         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1345             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1346 }
1347
1348 /*
1349  * Should always be called with qla_hw_data->tgt.sess_lock held.
1350  */
1351 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1352                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1353 {
1354         struct se_session *se_sess = sess->se_sess;
1355
1356         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1357                                      sess, port_id_to_be_id(sess->d_id));
1358         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1359                                 sess, sess->loop_id);
1360 }
1361
1362 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1363 {
1364         struct qla_tgt *tgt = sess->tgt;
1365         struct qla_hw_data *ha = tgt->ha;
1366         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1367         struct se_session *se_sess;
1368         struct tcm_qla2xxx_lport *lport;
1369
1370         BUG_ON(in_interrupt());
1371
1372         se_sess = sess->se_sess;
1373         if (!se_sess) {
1374                 pr_err("struct fc_port->se_sess is NULL\n");
1375                 dump_stack();
1376                 return;
1377         }
1378
1379         lport = vha->vha_tgt.target_lport_ptr;
1380         if (!lport) {
1381                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1382                 dump_stack();
1383                 return;
1384         }
1385         target_wait_for_sess_cmds(se_sess);
1386
1387         target_remove_session(se_sess);
1388 }
1389
1390 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1391                                   struct se_session *se_sess, void *p)
1392 {
1393         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1394                                 struct tcm_qla2xxx_tpg, se_tpg);
1395         struct tcm_qla2xxx_lport *lport = tpg->lport;
1396         struct qla_hw_data *ha = lport->qla_vha->hw;
1397         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1398         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1399                                 struct tcm_qla2xxx_nacl, se_node_acl);
1400         struct fc_port *qlat_sess = p;
1401         uint16_t loop_id = qlat_sess->loop_id;
1402         unsigned long flags;
1403
1404         /*
1405          * And now setup se_nacl and session pointers into HW lport internal
1406          * mappings for fabric S_ID and LOOP_ID.
1407          */
1408         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1409         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1410                                      port_id_to_be_id(qlat_sess->d_id));
1411         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1412                                         se_sess, qlat_sess, loop_id);
1413         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1414
1415         return 0;
1416 }
1417
1418 /*
1419  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1420  * to locate struct se_node_acl
1421  */
1422 static int tcm_qla2xxx_check_initiator_node_acl(
1423         scsi_qla_host_t *vha,
1424         unsigned char *fc_wwpn,
1425         struct fc_port *qlat_sess)
1426 {
1427         struct qla_hw_data *ha = vha->hw;
1428         struct tcm_qla2xxx_lport *lport;
1429         struct tcm_qla2xxx_tpg *tpg;
1430         struct se_session *se_sess;
1431         unsigned char port_name[36];
1432         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1433                        TCM_QLA2XXX_DEFAULT_TAGS;
1434
1435         lport = vha->vha_tgt.target_lport_ptr;
1436         if (!lport) {
1437                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1438                 dump_stack();
1439                 return -EINVAL;
1440         }
1441         /*
1442          * Locate the TPG=1 reference..
1443          */
1444         tpg = lport->tpg_1;
1445         if (!tpg) {
1446                 pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1447                 return -EINVAL;
1448         }
1449         /*
1450          * Format the FCP Initiator port_name into colon seperated values to
1451          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1452          */
1453         memset(&port_name, 0, 36);
1454         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1455         /*
1456          * Locate our struct se_node_acl either from an explict NodeACL created
1457          * via ConfigFS, or via running in TPG demo mode.
1458          */
1459         se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1460                                        sizeof(struct qla_tgt_cmd),
1461                                        TARGET_PROT_ALL, port_name,
1462                                        qlat_sess, tcm_qla2xxx_session_cb);
1463         if (IS_ERR(se_sess))
1464                 return PTR_ERR(se_sess);
1465
1466         return 0;
1467 }
1468
1469 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1470                                     uint16_t loop_id, bool conf_compl_supported)
1471 {
1472         struct qla_tgt *tgt = sess->tgt;
1473         struct qla_hw_data *ha = tgt->ha;
1474         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1475         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1476         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1477         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1478                         struct tcm_qla2xxx_nacl, se_node_acl);
1479         u32 key;
1480
1481
1482         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1483                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1484                     sess, sess->port_name,
1485                     sess->loop_id, loop_id, sess->d_id.b.domain,
1486                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1487                     s_id.b.area, s_id.b.al_pa);
1488
1489         if (sess->loop_id != loop_id) {
1490                 /*
1491                  * Because we can shuffle loop IDs around and we
1492                  * update different sessions non-atomically, we might
1493                  * have overwritten this session's old loop ID
1494                  * already, and we might end up overwriting some other
1495                  * session that will be updated later.  So we have to
1496                  * be extra careful and we can't warn about those things...
1497                  */
1498                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1499                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1500
1501                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1502
1503                 sess->loop_id = loop_id;
1504         }
1505
1506         if (sess->d_id.b24 != s_id.b24) {
1507                 key = (((u32) sess->d_id.b.domain << 16) |
1508                        ((u32) sess->d_id.b.area   <<  8) |
1509                        ((u32) sess->d_id.b.al_pa));
1510
1511                 if (btree_lookup32(&lport->lport_fcport_map, key))
1512                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1513                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1514                             sess->d_id.b.domain, sess->d_id.b.area,
1515                             sess->d_id.b.al_pa);
1516                 else
1517                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1518                              sess->d_id.b.domain, sess->d_id.b.area,
1519                              sess->d_id.b.al_pa);
1520
1521                 key = (((u32) s_id.b.domain << 16) |
1522                        ((u32) s_id.b.area   <<  8) |
1523                        ((u32) s_id.b.al_pa));
1524
1525                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1526                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1527                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1528                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1529                 } else {
1530                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1531                             GFP_ATOMIC);
1532                 }
1533
1534                 sess->d_id = s_id;
1535                 nacl->nport_id = key;
1536         }
1537
1538         sess->conf_compl_supported = conf_compl_supported;
1539
1540 }
1541
1542 /*
1543  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1544  */
1545 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1546         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1547         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1548         .handle_data            = tcm_qla2xxx_handle_data,
1549         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1550         .free_cmd               = tcm_qla2xxx_free_cmd,
1551         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1552         .free_session           = tcm_qla2xxx_free_session,
1553         .update_sess            = tcm_qla2xxx_update_sess,
1554         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1555         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1556         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1557         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1558         .put_sess               = tcm_qla2xxx_put_sess,
1559         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1560         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1561         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1562 };
1563
1564 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1565 {
1566         int rc;
1567
1568         rc = btree_init32(&lport->lport_fcport_map);
1569         if (rc) {
1570                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1571                 return rc;
1572         }
1573
1574         lport->lport_loopid_map =
1575                 vzalloc(array_size(65536,
1576                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1577         if (!lport->lport_loopid_map) {
1578                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1579                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1580                 btree_destroy32(&lport->lport_fcport_map);
1581                 return -ENOMEM;
1582         }
1583         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1584                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1585         return 0;
1586 }
1587
1588 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1589                                          void *target_lport_ptr,
1590                                          u64 npiv_wwpn, u64 npiv_wwnn)
1591 {
1592         struct qla_hw_data *ha = vha->hw;
1593         struct tcm_qla2xxx_lport *lport =
1594                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1595         /*
1596          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1597          */
1598         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1599         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1600         lport->qla_vha = vha;
1601
1602         return 0;
1603 }
1604
1605 static struct se_wwn *tcm_qla2xxx_make_lport(
1606         struct target_fabric_configfs *tf,
1607         struct config_group *group,
1608         const char *name)
1609 {
1610         struct tcm_qla2xxx_lport *lport;
1611         u64 wwpn;
1612         int ret = -ENODEV;
1613
1614         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1615                 return ERR_PTR(-EINVAL);
1616
1617         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1618         if (!lport) {
1619                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1620                 return ERR_PTR(-ENOMEM);
1621         }
1622         lport->lport_wwpn = wwpn;
1623         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1624                                 wwpn);
1625         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1626
1627         ret = tcm_qla2xxx_init_lport(lport);
1628         if (ret != 0)
1629                 goto out;
1630
1631         ret = qlt_lport_register(lport, wwpn, 0, 0,
1632                                  tcm_qla2xxx_lport_register_cb);
1633         if (ret != 0)
1634                 goto out_lport;
1635
1636         return &lport->lport_wwn;
1637 out_lport:
1638         vfree(lport->lport_loopid_map);
1639         btree_destroy32(&lport->lport_fcport_map);
1640 out:
1641         kfree(lport);
1642         return ERR_PTR(ret);
1643 }
1644
1645 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1646 {
1647         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1648                         struct tcm_qla2xxx_lport, lport_wwn);
1649         struct scsi_qla_host *vha = lport->qla_vha;
1650         struct se_node_acl *node;
1651         u32 key = 0;
1652
1653         /*
1654          * Call into qla2x_target.c LLD logic to complete the
1655          * shutdown of struct qla_tgt after the call to
1656          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1657          */
1658         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1659                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1660
1661         qlt_lport_deregister(vha);
1662
1663         vfree(lport->lport_loopid_map);
1664         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1665                 btree_remove32(&lport->lport_fcport_map, key);
1666         btree_destroy32(&lport->lport_fcport_map);
1667         kfree(lport);
1668 }
1669
1670 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1671                                               void *target_lport_ptr,
1672                                               u64 npiv_wwpn, u64 npiv_wwnn)
1673 {
1674         struct fc_vport *vport;
1675         struct Scsi_Host *sh = base_vha->host;
1676         struct scsi_qla_host *npiv_vha;
1677         struct tcm_qla2xxx_lport *lport =
1678                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1679         struct tcm_qla2xxx_lport *base_lport =
1680                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1681         struct fc_vport_identifiers vport_id;
1682
1683         if (qla_ini_mode_enabled(base_vha)) {
1684                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1685                 return -EPERM;
1686         }
1687
1688         if (!base_lport || !base_lport->tpg_1 ||
1689             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1690                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1691                 return -EPERM;
1692         }
1693
1694         memset(&vport_id, 0, sizeof(vport_id));
1695         vport_id.port_name = npiv_wwpn;
1696         vport_id.node_name = npiv_wwnn;
1697         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1698         vport_id.vport_type = FC_PORTTYPE_NPIV;
1699         vport_id.disable = false;
1700
1701         vport = fc_vport_create(sh, 0, &vport_id);
1702         if (!vport) {
1703                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1704                 return -ENODEV;
1705         }
1706         /*
1707          * Setup local pointer to NPIV vhba + target_lport_ptr
1708          */
1709         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1710         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1711         lport->qla_vha = npiv_vha;
1712         scsi_host_get(npiv_vha->host);
1713         return 0;
1714 }
1715
1716
1717 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1718         struct target_fabric_configfs *tf,
1719         struct config_group *group,
1720         const char *name)
1721 {
1722         struct tcm_qla2xxx_lport *lport;
1723         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1724         char *p, tmp[128];
1725         int ret;
1726
1727         snprintf(tmp, 128, "%s", name);
1728
1729         p = strchr(tmp, '@');
1730         if (!p) {
1731                 pr_err("Unable to locate NPIV '@' separator\n");
1732                 return ERR_PTR(-EINVAL);
1733         }
1734         *p++ = '\0';
1735
1736         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1737                 return ERR_PTR(-EINVAL);
1738
1739         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1740                                        &npiv_wwpn, &npiv_wwnn) < 0)
1741                 return ERR_PTR(-EINVAL);
1742
1743         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1744         if (!lport) {
1745                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1746                 return ERR_PTR(-ENOMEM);
1747         }
1748         lport->lport_npiv_wwpn = npiv_wwpn;
1749         lport->lport_npiv_wwnn = npiv_wwnn;
1750         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1751
1752         ret = tcm_qla2xxx_init_lport(lport);
1753         if (ret != 0)
1754                 goto out;
1755
1756         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1757                                  tcm_qla2xxx_lport_register_npiv_cb);
1758         if (ret != 0)
1759                 goto out_lport;
1760
1761         return &lport->lport_wwn;
1762 out_lport:
1763         vfree(lport->lport_loopid_map);
1764         btree_destroy32(&lport->lport_fcport_map);
1765 out:
1766         kfree(lport);
1767         return ERR_PTR(ret);
1768 }
1769
1770 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1771 {
1772         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1773                         struct tcm_qla2xxx_lport, lport_wwn);
1774         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1775         struct qla_hw_data *ha = npiv_vha->hw;
1776         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1777
1778         scsi_host_put(npiv_vha->host);
1779         /*
1780          * Notify libfc that we want to release the vha->fc_vport
1781          */
1782         fc_vport_terminate(npiv_vha->fc_vport);
1783         scsi_host_put(base_vha->host);
1784         kfree(lport);
1785 }
1786
1787
1788 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1789                 char *page)
1790 {
1791         return sprintf(page,
1792             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1793             QLA2XXX_VERSION, utsname()->sysname,
1794             utsname()->machine, utsname()->release);
1795 }
1796
1797 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1798
1799 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1800         &tcm_qla2xxx_wwn_attr_version,
1801         NULL,
1802 };
1803
1804 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1805         .module                         = THIS_MODULE,
1806         .fabric_name                    = "qla2xxx",
1807         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1808         /*
1809          * XXX: Limit assumes single page per scatter-gather-list entry.
1810          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1811          */
1812         .max_data_sg_nents              = 1200,
1813         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1814         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1815         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1816         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1817         .tpg_check_demo_mode_write_protect =
1818                                         tcm_qla2xxx_check_demo_write_protect,
1819         .tpg_check_prod_mode_write_protect =
1820                                         tcm_qla2xxx_check_prod_write_protect,
1821         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1822         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1823         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1824         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1825         .release_cmd                    = tcm_qla2xxx_release_cmd,
1826         .close_session                  = tcm_qla2xxx_close_session,
1827         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1828         .sess_get_initiator_sid         = NULL,
1829         .write_pending                  = tcm_qla2xxx_write_pending,
1830         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1831         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1832         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1833         .queue_status                   = tcm_qla2xxx_queue_status,
1834         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1835         .aborted_task                   = tcm_qla2xxx_aborted_task,
1836         /*
1837          * Setup function pointers for generic logic in
1838          * target_core_fabric_configfs.c
1839          */
1840         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1841         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1842         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1843         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1844         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1845
1846         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1847         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1848         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1849 };
1850
1851 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1852         .module                         = THIS_MODULE,
1853         .fabric_name                    = "qla2xxx_npiv",
1854         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1855         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1856         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1857         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1858         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1859         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1860         .tpg_check_prod_mode_write_protect =
1861             tcm_qla2xxx_check_prod_write_protect,
1862         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1863         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1864         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1865         .release_cmd                    = tcm_qla2xxx_release_cmd,
1866         .close_session                  = tcm_qla2xxx_close_session,
1867         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1868         .sess_get_initiator_sid         = NULL,
1869         .write_pending                  = tcm_qla2xxx_write_pending,
1870         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1871         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1872         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1873         .queue_status                   = tcm_qla2xxx_queue_status,
1874         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1875         .aborted_task                   = tcm_qla2xxx_aborted_task,
1876         /*
1877          * Setup function pointers for generic logic in
1878          * target_core_fabric_configfs.c
1879          */
1880         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1881         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1882         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1883         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1884         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1885
1886         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1887         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1888 };
1889
1890 static int tcm_qla2xxx_register_configfs(void)
1891 {
1892         int ret;
1893
1894         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1895             QLA2XXX_VERSION, utsname()->sysname,
1896             utsname()->machine, utsname()->release);
1897
1898         ret = target_register_template(&tcm_qla2xxx_ops);
1899         if (ret)
1900                 return ret;
1901
1902         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1903         if (ret)
1904                 goto out_fabric;
1905
1906         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1907                                                 WQ_MEM_RECLAIM, 0);
1908         if (!tcm_qla2xxx_free_wq) {
1909                 ret = -ENOMEM;
1910                 goto out_fabric_npiv;
1911         }
1912
1913         return 0;
1914
1915 out_fabric_npiv:
1916         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1917 out_fabric:
1918         target_unregister_template(&tcm_qla2xxx_ops);
1919         return ret;
1920 }
1921
1922 static void tcm_qla2xxx_deregister_configfs(void)
1923 {
1924         destroy_workqueue(tcm_qla2xxx_free_wq);
1925
1926         target_unregister_template(&tcm_qla2xxx_ops);
1927         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1928 }
1929
1930 static int __init tcm_qla2xxx_init(void)
1931 {
1932         int ret;
1933
1934         ret = tcm_qla2xxx_register_configfs();
1935         if (ret < 0)
1936                 return ret;
1937
1938         return 0;
1939 }
1940
1941 static void __exit tcm_qla2xxx_exit(void)
1942 {
1943         tcm_qla2xxx_deregister_configfs();
1944 }
1945
1946 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1947 MODULE_LICENSE("GPL");
1948 module_init(tcm_qla2xxx_init);
1949 module_exit(tcm_qla2xxx_exit);