drivers/scsi/qla2xxx/tcm_qla2xxx.c

   1 /*******************************************************************************
   2  * This file contains tcm implementation using v4 configfs fabric infrastructure
   3  * for QLogic target mode HBAs
   4  *
   5  * (c) Copyright 2010-2013 Datera, Inc.
   6  *
   7  * Author: Nicholas A. Bellinger <nab@daterainc.com>
   8  *
   9  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  10  * the TCM_FC / Open-FCoE.org fabric module.
  11  *
  12  * Copyright (c) 2010 Cisco Systems, Inc
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  ****************************************************************************/
  24
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/utsname.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/init.h>
  31 #include <linux/list.h>
  32 #include <linux/slab.h>
  33 #include <linux/kthread.h>
  34 #include <linux/types.h>
  35 #include <linux/string.h>
  36 #include <linux/configfs.h>
  37 #include <linux/ctype.h>
  38 #include <asm/unaligned.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_host.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <target/target_core_base.h>
  44 #include <target/target_core_fabric.h>
  45
  46 #include "qla_def.h"
  47 #include "qla_target.h"
  48 #include "tcm_qla2xxx.h"
  49
  50 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  51 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  52
  53 /*
  54  * Parse WWN.
  55  * If strict, we require lower-case hex and colon separators to be sure
  56  * the name is the same as what would be generated by ft_format_wwn()
  57  * so the name and wwn are mapped one-to-one.
  58  */
  59 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  60 {
  61         const char *cp;
  62         char c;
  63         u32 nibble;
  64         u32 byte = 0;
  65         u32 pos = 0;
  66         u32 err;
  67
  68         *wwn = 0;
  69         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  70                 c = *cp;
  71                 if (c == '\n' && cp[1] == '\0')
  72                         continue;
  73                 if (strict && pos++ == 2 && byte++ < 7) {
  74                         pos = 0;
  75                         if (c == ':')
  76                                 continue;
  77                         err = 1;
  78                         goto fail;
  79                 }
  80                 if (c == '\0') {
  81                         err = 2;
  82                         if (strict && byte != 8)
  83                                 goto fail;
  84                         return cp - name;
  85                 }
  86                 err = 3;
  87                 if (isdigit(c))
  88                         nibble = c - '0';
  89                 else if (isxdigit(c) && (islower(c) || !strict))
  90                         nibble = tolower(c) - 'a' + 10;
  91                 else
  92                         goto fail;
  93                 *wwn = (*wwn << 4) | nibble;
  94         }
  95         err = 4;
  96 fail:
  97         pr_debug("err %u len %zu pos %u byte %u\n",
  98                         err, cp - name, pos, byte);
  99         return -1;
 100 }
 101
 102 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 103 {
 104         u8 b[8];
 105
 106         put_unaligned_be64(wwn, b);
 107         return snprintf(buf, len,
 108                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 109                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 110 }
 111
 112 static char *tcm_qla2xxx_get_fabric_name(void)
 113 {
 114         return "qla2xxx";
 115 }
 116
 117 /*
 118  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 119  */
 120 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 121 {
 122         unsigned int i, j;
 123         u8 wwn[8];
 124
 125         memset(wwn, 0, sizeof(wwn));
 126
 127         /* Validate and store the new name */
 128         for (i = 0, j = 0; i < 16; i++) {
 129                 int value;
 130
 131                 value = hex_to_bin(*ns++);
 132                 if (value >= 0)
 133                         j = (j << 4) | value;
 134                 else
 135                         return -EINVAL;
 136
 137                 if (i % 2) {
 138                         wwn[i/2] = j & 0xff;
 139                         j = 0;
 140                 }
 141         }
 142
 143         *nm = wwn_to_u64(wwn);
 144         return 0;
 145 }
 146
 147 /*
 148  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 149  * store_fc_host_vport_create()
 150  */
 151 static int tcm_qla2xxx_npiv_parse_wwn(
 152         const char *name,
 153         size_t count,
 154         u64 *wwpn,
 155         u64 *wwnn)
 156 {
 157         unsigned int cnt = count;
 158         int rc;
 159
 160         *wwpn = 0;
 161         *wwnn = 0;
 162
 163         /* count may include a LF at end of string */
 164         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 165                 cnt--;
 166
 167         /* validate we have enough characters for WWPN */
 168         if ((cnt != (16+1+16)) || (name[16] != ':'))
 169                 return -EINVAL;
 170
 171         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 172         if (rc != 0)
 173                 return rc;
 174
 175         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 176         if (rc != 0)
 177                 return rc;
 178
 179         return 0;
 180 }
 181
 182 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 183 {
 184         return "qla2xxx_npiv";
 185 }
 186
 187 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 188 {
 189         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 190                                 struct tcm_qla2xxx_tpg, se_tpg);
 191         struct tcm_qla2xxx_lport *lport = tpg->lport;
 192
 193         return lport->lport_naa_name;
 194 }
 195
 196 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 197 {
 198         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 199                                 struct tcm_qla2xxx_tpg, se_tpg);
 200         return tpg->lport_tpgt;
 201 }
 202
 203 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 204 {
 205         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 206                                 struct tcm_qla2xxx_tpg, se_tpg);
 207
 208         return tpg->tpg_attrib.generate_node_acls;
 209 }
 210
 211 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 212 {
 213         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 214                                 struct tcm_qla2xxx_tpg, se_tpg);
 215
 216         return tpg->tpg_attrib.cache_dynamic_acls;
 217 }
 218
 219 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 220 {
 221         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 222                                 struct tcm_qla2xxx_tpg, se_tpg);
 223
 224         return tpg->tpg_attrib.demo_mode_write_protect;
 225 }
 226
 227 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 228 {
 229         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 230                                 struct tcm_qla2xxx_tpg, se_tpg);
 231
 232         return tpg->tpg_attrib.prod_mode_write_protect;
 233 }
 234
 235 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 236 {
 237         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 238                                 struct tcm_qla2xxx_tpg, se_tpg);
 239
 240         return tpg->tpg_attrib.demo_mode_login_only;
 241 }
 242
 243 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 244 {
 245         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 246                                 struct tcm_qla2xxx_tpg, se_tpg);
 247
 248         return tpg->tpg_attrib.fabric_prot_type;
 249 }
 250
 251 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 252 {
 253         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 254                                 struct tcm_qla2xxx_tpg, se_tpg);
 255
 256         return tpg->lport_tpgt;
 257 }
 258
 259 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 260 {
 261         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 262                         struct qla_tgt_mgmt_cmd, free_work);
 263
 264         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 265 }
 266
 267 /*
 268  * Called from qla_target_template->free_mcmd(), and will call
 269  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 270  * release callback.  qla_hw_data->hardware_lock is expected to be held
 271  */
 272 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 273 {
 274         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 275         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 276 }
 277
 278 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 279 {
 280         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 281
 282         cmd->cmd_in_wq = 0;
 283
 284         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 285
 286         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 287         cmd->trc_flags |= TRC_CMD_FREE;
 288         transport_generic_free_cmd(&cmd->se_cmd, 0);
 289 }
 290
 291 /*
 292  * Called from qla_target_template->free_cmd(), and will call
 293  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 294  * release callback.  qla_hw_data->hardware_lock is expected to be held
 295  */
 296 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 297 {
 298         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 299         cmd->cmd_in_wq = 1;
 300
 301         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 302         cmd->trc_flags |= TRC_CMD_DONE;
 303
 304         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 305         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 306 }
 307
 308 /*
 309  * Called from struct target_core_fabric_ops->check_stop_free() context
 310  */
 311 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 312 {
 313         struct qla_tgt_cmd *cmd;
 314
 315         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 316                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 317                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 318         }
 319
 320         return target_put_sess_cmd(se_cmd);
 321 }
 322
 323 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 324  * fabric descriptor @se_cmd command to release
 325  */
 326 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 327 {
 328         struct qla_tgt_cmd *cmd;
 329
 330         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 331                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 332                                 struct qla_tgt_mgmt_cmd, se_cmd);
 333                 qlt_free_mcmd(mcmd);
 334                 return;
 335         }
 336
 337         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 338         qlt_free_cmd(cmd);
 339 }
 340
 341 static void tcm_qla2xxx_release_session(struct kref *kref)
 342 {
 343         struct fc_port  *sess = container_of(kref,
 344             struct fc_port, sess_kref);
 345
 346         qlt_unreg_sess(sess);
 347 }
 348
 349 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 350 {
 351         if (!sess)
 352                 return;
 353
 354         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 355         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 356 }
 357
 358 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 359 {
 360         struct fc_port *sess = se_sess->fabric_sess_ptr;
 361         struct scsi_qla_host *vha;
 362         unsigned long flags;
 363
 364         BUG_ON(!sess);
 365         vha = sess->vha;
 366
 367         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 368         target_sess_cmd_list_set_waiting(se_sess);
 369         tcm_qla2xxx_put_sess(sess);
 370         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 371 }
 372
 373 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 374 {
 375         return 0;
 376 }
 377
 378 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 379 {
 380         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 381                                 struct qla_tgt_cmd, se_cmd);
 382
 383         if (cmd->aborted) {
 384                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 385                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 386                  * already kick start the free.
 387                  */
 388                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 389                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 390                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 391                         cmd->se_cmd.transport_state,
 392                         cmd->se_cmd.t_state,
 393                         cmd->se_cmd.se_cmd_flags);
 394                 return 0;
 395         }
 396         cmd->trc_flags |= TRC_XFR_RDY;
 397         cmd->bufflen = se_cmd->data_length;
 398         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 399
 400         cmd->sg_cnt = se_cmd->t_data_nents;
 401         cmd->sg = se_cmd->t_data_sg;
 402
 403         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 404         cmd->prot_sg = se_cmd->t_prot_sg;
 405         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 406         se_cmd->pi_err = 0;
 407
 408         /*
 409          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 410          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 411          */
 412         return qlt_rdy_to_xfer(cmd);
 413 }
 414
 415 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 416 {
 417         unsigned long flags;
 418         /*
 419          * Check for WRITE_PENDING status to determine if we need to wait for
 420          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 421          */
 422         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 423         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 424             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 425                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 426                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 427                                                 50);
 428                 return 0;
 429         }
 430         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 431
 432         return 0;
 433 }
 434
 435 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 436 {
 437         return;
 438 }
 439
 440 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 441 {
 442         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 443                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 444                                 struct qla_tgt_cmd, se_cmd);
 445                 return cmd->state;
 446         }
 447
 448         return 0;
 449 }
 450
 451 /*
 452  * Called from process context in qla_target.c:qlt_do_work() code
 453  */
 454 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 455         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 456         int data_dir, int bidi)
 457 {
 458         struct se_cmd *se_cmd = &cmd->se_cmd;
 459         struct se_session *se_sess;
 460         struct fc_port *sess;
 461 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 462         struct se_portal_group *se_tpg;
 463         struct tcm_qla2xxx_tpg *tpg;
 464 #endif
 465         int flags = TARGET_SCF_ACK_KREF;
 466
 467         if (bidi)
 468                 flags |= TARGET_SCF_BIDI_OP;
 469
 470         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 471                 flags |= TARGET_SCF_USE_CPUID;
 472
 473         sess = cmd->sess;
 474         if (!sess) {
 475                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 476                 return -EINVAL;
 477         }
 478
 479         se_sess = sess->se_sess;
 480         if (!se_sess) {
 481                 pr_err("Unable to locate active struct se_session\n");
 482                 return -EINVAL;
 483         }
 484
 485 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 486         se_tpg = se_sess->se_tpg;
 487         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 488         if (unlikely(tpg->tpg_attrib.jam_host)) {
 489                 /* return, and dont run target_submit_cmd,discarding command */
 490                 return 0;
 491         }
 492 #endif
 493
 494         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 495         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 496                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 497                                 data_dir, flags);
 498 }
 499
 500 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 501 {
 502         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 503
 504         /*
 505          * Ensure that the complete FCP WRITE payload has been received.
 506          * Otherwise return an exception via CHECK_CONDITION status.
 507          */
 508         cmd->cmd_in_wq = 0;
 509
 510         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 511         if (!cmd->write_data_transferred) {
 512                 /*
 513                  * Check if se_cmd has already been aborted via LUN_RESET, and
 514                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 515                  */
 516                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 517                         complete(&cmd->se_cmd.t_transport_stop_comp);
 518                         return;
 519                 }
 520
 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         int flags = TARGET_SCF_ACK_KREF;
 592
 593         switch (tmr_func) {
 594         case QLA_TGT_ABTS:
 595                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 596                 transl_tmr_func = TMR_ABORT_TASK;
 597                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 598                 break;
 599         case QLA_TGT_2G_ABORT_TASK:
 600                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 601                 transl_tmr_func = TMR_ABORT_TASK;
 602                 break;
 603         case QLA_TGT_CLEAR_ACA:
 604                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 605                 transl_tmr_func = TMR_CLEAR_ACA;
 606                 break;
 607         case QLA_TGT_TARGET_RESET:
 608                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 609                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 610                 break;
 611         case QLA_TGT_LUN_RESET:
 612                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 613                 transl_tmr_func = TMR_LUN_RESET;
 614                 break;
 615         case QLA_TGT_CLEAR_TS:
 616                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 617                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 618                 break;
 619         case QLA_TGT_ABORT_TS:
 620                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 621                 transl_tmr_func = TMR_ABORT_TASK_SET;
 622                 break;
 623         default:
 624                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 625                     sess->vha->host_no, tmr_func);
 626                 return -ENOSYS;
 627         }
 628
 629         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 630             transl_tmr_func, GFP_ATOMIC, tag, flags);
 631 }
 632
 633 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 634 {
 635         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 636                                 struct qla_tgt_cmd, se_cmd);
 637
 638         if (cmd->aborted) {
 639                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 640                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 641                  * already kick start the free.
 642                  */
 643                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 644                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 645                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 646                         cmd->se_cmd.transport_state,
 647                         cmd->se_cmd.t_state,
 648                         cmd->se_cmd.se_cmd_flags);
 649                 return 0;
 650         }
 651
 652         cmd->trc_flags |= TRC_XMIT_DATA;
 653         cmd->bufflen = se_cmd->data_length;
 654         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 655
 656         cmd->sg_cnt = se_cmd->t_data_nents;
 657         cmd->sg = se_cmd->t_data_sg;
 658         cmd->offset = 0;
 659
 660         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 661         cmd->prot_sg = se_cmd->t_prot_sg;
 662         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 663         se_cmd->pi_err = 0;
 664
 665         /*
 666          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 667          */
 668         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 669                                 se_cmd->scsi_status);
 670 }
 671
 672 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 673 {
 674         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 675                                 struct qla_tgt_cmd, se_cmd);
 676         int xmit_type = QLA_TGT_XMIT_STATUS;
 677
 678         if (cmd->aborted) {
 679                 /*
 680                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 681                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 682                  * already kick start the free.
 683                  */
 684                 pr_debug(
 685                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 686                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 687                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 688                     cmd->se_cmd.se_cmd_flags);
 689                 return 0;
 690         }
 691         cmd->bufflen = se_cmd->data_length;
 692         cmd->sg = NULL;
 693         cmd->sg_cnt = 0;
 694         cmd->offset = 0;
 695         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 696         if (cmd->trc_flags & TRC_XMIT_STATUS) {
 697                 pr_crit("Multiple calls for status = %p.\n", cmd);
 698                 dump_stack();
 699         }
 700         cmd->trc_flags |= TRC_XMIT_STATUS;
 701
 702         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 703                 /*
 704                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 705                  * for qla_tgt_xmit_response LLD code
 706                  */
 707                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 708                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 709                         se_cmd->residual_count = 0;
 710                 }
 711                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 712                 se_cmd->residual_count += se_cmd->data_length;
 713
 714                 cmd->bufflen = 0;
 715         }
 716         /*
 717          * Now queue status response to qla2xxx LLD code and response ring
 718          */
 719         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 720 }
 721
 722 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 723 {
 724         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 725         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 726                                 struct qla_tgt_mgmt_cmd, se_cmd);
 727
 728         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 729                         mcmd, se_tmr->function, se_tmr->response);
 730         /*
 731          * Do translation between TCM TM response codes and
 732          * QLA2xxx FC TM response codes.
 733          */
 734         switch (se_tmr->response) {
 735         case TMR_FUNCTION_COMPLETE:
 736                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 737                 break;
 738         case TMR_TASK_DOES_NOT_EXIST:
 739                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 740                 break;
 741         case TMR_FUNCTION_REJECTED:
 742                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 743                 break;
 744         case TMR_LUN_DOES_NOT_EXIST:
 745         default:
 746                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 747                 break;
 748         }
 749         /*
 750          * Queue the TM response to QLA2xxx LLD to build a
 751          * CTIO response packet.
 752          */
 753         qlt_xmit_tm_rsp(mcmd);
 754 }
 755
 756 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 757 {
 758         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 759                                 struct qla_tgt_cmd, se_cmd);
 760
 761         if (qlt_abort_cmd(cmd))
 762                 return;
 763 }
 764
 765 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 766                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 767 /*
 768  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 769  */
 770 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 771 {
 772         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 773         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 774         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 775         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 776                                 struct tcm_qla2xxx_lport, lport_wwn);
 777         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 778                                 struct tcm_qla2xxx_nacl, se_node_acl);
 779         void *node;
 780
 781         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 782
 783         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 784         if (WARN_ON(node && (node != se_nacl))) {
 785                 /*
 786                  * The nacl no longer matches what we think it should be.
 787                  * Most likely a new dynamic acl has been added while
 788                  * someone dropped the hardware lock.  It clearly is a
 789                  * bug elsewhere, but this bit can't make things worse.
 790                  */
 791                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 792                                node, GFP_ATOMIC);
 793         }
 794
 795         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 796             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 797         /*
 798          * Now clear the se_nacl and session pointers from our HW lport lookup
 799          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 800          *
 801          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 802          * target_wait_for_sess_cmds() before the session waits for outstanding
 803          * I/O to complete, to avoid a race between session shutdown execution
 804          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 805          */
 806         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 807 }
 808
 809 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 810 {
 811         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 812         target_sess_cmd_list_set_waiting(sess->se_sess);
 813 }
 814
 815 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 816                 const char *name)
 817 {
 818         struct tcm_qla2xxx_nacl *nacl =
 819                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 820         u64 wwnn;
 821
 822         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 823                 return -EINVAL;
 824
 825         nacl->nport_wwnn = wwnn;
 826         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 827
 828         return 0;
 829 }
 830
 831 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 832
 833 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 834                                                                         \
 835 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 836                 struct config_item *item, char *page)                   \
 837 {                                                                       \
 838         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 839         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 840                         struct tcm_qla2xxx_tpg, se_tpg);                \
 841                                                                         \
 842         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 843 }                                                                       \
 844                                                                         \
 845 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 846                 struct config_item *item, const char *page, size_t count) \
 847 {                                                                       \
 848         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 849         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 850                         struct tcm_qla2xxx_tpg, se_tpg);                \
 851         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 852         unsigned long val;                                              \
 853         int ret;                                                        \
 854                                                                         \
 855         ret = kstrtoul(page, 0, &val);                                  \
 856         if (ret < 0) {                                                  \
 857                 pr_err("kstrtoul() failed with"                         \
 858                                 " ret: %d\n", ret);                     \
 859                 return -EINVAL;                                         \
 860         }                                                               \
 861                                                                         \
 862         if ((val != 0) && (val != 1)) {                                 \
 863                 pr_err("Illegal boolean value %lu\n", val);             \
 864                 return -EINVAL;                                         \
 865         }                                                               \
 866                                                                         \
 867         a->name = val;                                                  \
 868                                                                         \
 869         return count;                                                   \
 870 }                                                                       \
 871 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 872
 873 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 874 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 875 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 876 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 877 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 878 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 879 DEF_QLA_TPG_ATTRIB(jam_host);
 880 #endif
 881
 882 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 883         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 884         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 885         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 886         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 887         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 888 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 889         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 890 #endif
 891         NULL,
 892 };
 893
 894 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 895
 896 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 897                 char *page)
 898 {
 899         struct se_portal_group *se_tpg = to_tpg(item);
 900         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 901                         struct tcm_qla2xxx_tpg, se_tpg);
 902
 903         return snprintf(page, PAGE_SIZE, "%d\n",
 904                         atomic_read(&tpg->lport_tpg_enabled));
 905 }
 906
 907 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 908 {
 909         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 910                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 911         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 912         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 913
 914         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 915                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 916                 qlt_enable_vha(base_vha);
 917         }
 918         complete(&base_tpg->tpg_base_comp);
 919 }
 920
 921 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 922 {
 923         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 924                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 925         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 926         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 927
 928         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 929                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 930                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 931         }
 932         complete(&base_tpg->tpg_base_comp);
 933 }
 934
 935 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 936                 const char *page, size_t count)
 937 {
 938         struct se_portal_group *se_tpg = to_tpg(item);
 939         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 940                         struct tcm_qla2xxx_tpg, se_tpg);
 941         unsigned long op;
 942         int rc;
 943
 944         rc = kstrtoul(page, 0, &op);
 945         if (rc < 0) {
 946                 pr_err("kstrtoul() returned %d\n", rc);
 947                 return -EINVAL;
 948         }
 949         if ((op != 1) && (op != 0)) {
 950                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 951                 return -EINVAL;
 952         }
 953         if (op) {
 954                 if (atomic_read(&tpg->lport_tpg_enabled))
 955                         return -EEXIST;
 956
 957                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 958         } else {
 959                 if (!atomic_read(&tpg->lport_tpg_enabled))
 960                         return count;
 961
 962                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 963         }
 964         init_completion(&tpg->tpg_base_comp);
 965         schedule_work(&tpg->tpg_base_work);
 966         wait_for_completion(&tpg->tpg_base_comp);
 967
 968         if (op) {
 969                 if (!atomic_read(&tpg->lport_tpg_enabled))
 970                         return -ENODEV;
 971         } else {
 972                 if (atomic_read(&tpg->lport_tpg_enabled))
 973                         return -EPERM;
 974         }
 975         return count;
 976 }
 977
 978 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 979                 char *page)
 980 {
 981         return target_show_dynamic_sessions(to_tpg(item), page);
 982 }
 983
 984 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 985                 const char *page, size_t count)
 986 {
 987         struct se_portal_group *se_tpg = to_tpg(item);
 988         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 989                                 struct tcm_qla2xxx_tpg, se_tpg);
 990         unsigned long val;
 991         int ret = kstrtoul(page, 0, &val);
 992
 993         if (ret) {
 994                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 995                 return ret;
 996         }
 997         if (val != 0 && val != 1 && val != 3) {
 998                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 999                 return -EINVAL;
1000         }
1001         tpg->tpg_attrib.fabric_prot_type = val;
1002
1003         return count;
1004 }
1005
1006 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1007                 char *page)
1008 {
1009         struct se_portal_group *se_tpg = to_tpg(item);
1010         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1011                                 struct tcm_qla2xxx_tpg, se_tpg);
1012
1013         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1014 }
1015
1016 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1017 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1018 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1019
1020 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1021         &tcm_qla2xxx_tpg_attr_enable,
1022         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1023         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1024         NULL,
1025 };
1026
1027 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1028         struct se_wwn *wwn,
1029         struct config_group *group,
1030         const char *name)
1031 {
1032         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1033                         struct tcm_qla2xxx_lport, lport_wwn);
1034         struct tcm_qla2xxx_tpg *tpg;
1035         unsigned long tpgt;
1036         int ret;
1037
1038         if (strstr(name, "tpgt_") != name)
1039                 return ERR_PTR(-EINVAL);
1040         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1041                 return ERR_PTR(-EINVAL);
1042
1043         if ((tpgt != 1)) {
1044                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1045                 return ERR_PTR(-ENOSYS);
1046         }
1047
1048         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1049         if (!tpg) {
1050                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1051                 return ERR_PTR(-ENOMEM);
1052         }
1053         tpg->lport = lport;
1054         tpg->lport_tpgt = tpgt;
1055         /*
1056          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1057          * NodeACLs
1058          */
1059         tpg->tpg_attrib.generate_node_acls = 1;
1060         tpg->tpg_attrib.demo_mode_write_protect = 1;
1061         tpg->tpg_attrib.cache_dynamic_acls = 1;
1062         tpg->tpg_attrib.demo_mode_login_only = 1;
1063         tpg->tpg_attrib.jam_host = 0;
1064
1065         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1066         if (ret < 0) {
1067                 kfree(tpg);
1068                 return NULL;
1069         }
1070
1071         lport->tpg_1 = tpg;
1072
1073         return &tpg->se_tpg;
1074 }
1075
1076 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1077 {
1078         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1079                         struct tcm_qla2xxx_tpg, se_tpg);
1080         struct tcm_qla2xxx_lport *lport = tpg->lport;
1081         struct scsi_qla_host *vha = lport->qla_vha;
1082         /*
1083          * Call into qla2x_target.c LLD logic to shutdown the active
1084          * FC Nexuses and disable target mode operation for this qla_hw_data
1085          */
1086         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1087                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1088
1089         core_tpg_deregister(se_tpg);
1090         /*
1091          * Clear local TPG=1 pointer for non NPIV mode.
1092          */
1093         lport->tpg_1 = NULL;
1094         kfree(tpg);
1095 }
1096
1097 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1098                 char *page)
1099 {
1100         return tcm_qla2xxx_tpg_enable_show(item, page);
1101 }
1102
1103 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1104                 const char *page, size_t count)
1105 {
1106         struct se_portal_group *se_tpg = to_tpg(item);
1107         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1108         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1109                         struct tcm_qla2xxx_lport, lport_wwn);
1110         struct scsi_qla_host *vha = lport->qla_vha;
1111         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1112                         struct tcm_qla2xxx_tpg, se_tpg);
1113         unsigned long op;
1114         int rc;
1115
1116         rc = kstrtoul(page, 0, &op);
1117         if (rc < 0) {
1118                 pr_err("kstrtoul() returned %d\n", rc);
1119                 return -EINVAL;
1120         }
1121         if ((op != 1) && (op != 0)) {
1122                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1123                 return -EINVAL;
1124         }
1125         if (op) {
1126                 if (atomic_read(&tpg->lport_tpg_enabled))
1127                         return -EEXIST;
1128
1129                 atomic_set(&tpg->lport_tpg_enabled, 1);
1130                 qlt_enable_vha(vha);
1131         } else {
1132                 if (!atomic_read(&tpg->lport_tpg_enabled))
1133                         return count;
1134
1135                 atomic_set(&tpg->lport_tpg_enabled, 0);
1136                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1137         }
1138
1139         return count;
1140 }
1141
1142 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1143
1144 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1145         &tcm_qla2xxx_npiv_tpg_attr_enable,
1146         NULL,
1147 };
1148
1149 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1150         struct se_wwn *wwn,
1151         struct config_group *group,
1152         const char *name)
1153 {
1154         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1155                         struct tcm_qla2xxx_lport, lport_wwn);
1156         struct tcm_qla2xxx_tpg *tpg;
1157         unsigned long tpgt;
1158         int ret;
1159
1160         if (strstr(name, "tpgt_") != name)
1161                 return ERR_PTR(-EINVAL);
1162         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1163                 return ERR_PTR(-EINVAL);
1164
1165         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1166         if (!tpg) {
1167                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1168                 return ERR_PTR(-ENOMEM);
1169         }
1170         tpg->lport = lport;
1171         tpg->lport_tpgt = tpgt;
1172
1173         /*
1174          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1175          * NodeACLs
1176          */
1177         tpg->tpg_attrib.generate_node_acls = 1;
1178         tpg->tpg_attrib.demo_mode_write_protect = 1;
1179         tpg->tpg_attrib.cache_dynamic_acls = 1;
1180         tpg->tpg_attrib.demo_mode_login_only = 1;
1181
1182         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1183         if (ret < 0) {
1184                 kfree(tpg);
1185                 return NULL;
1186         }
1187         lport->tpg_1 = tpg;
1188         return &tpg->se_tpg;
1189 }
1190
1191 /*
1192  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1193  */
1194 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1195         scsi_qla_host_t *vha,
1196         const uint8_t *s_id)
1197 {
1198         struct tcm_qla2xxx_lport *lport;
1199         struct se_node_acl *se_nacl;
1200         struct tcm_qla2xxx_nacl *nacl;
1201         u32 key;
1202
1203         lport = vha->vha_tgt.target_lport_ptr;
1204         if (!lport) {
1205                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1206                 dump_stack();
1207                 return NULL;
1208         }
1209
1210         key = sid_to_key(s_id);
1211         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1212
1213         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1214         if (!se_nacl) {
1215                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1216                 return NULL;
1217         }
1218         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1219             se_nacl, se_nacl->initiatorname);
1220
1221         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1222         if (!nacl->fc_port) {
1223                 pr_err("Unable to locate struct fc_port\n");
1224                 return NULL;
1225         }
1226
1227         return nacl->fc_port;
1228 }
1229
1230 /*
1231  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1232  */
1233 static void tcm_qla2xxx_set_sess_by_s_id(
1234         struct tcm_qla2xxx_lport *lport,
1235         struct se_node_acl *new_se_nacl,
1236         struct tcm_qla2xxx_nacl *nacl,
1237         struct se_session *se_sess,
1238         struct fc_port *fc_port,
1239         uint8_t *s_id)
1240 {
1241         u32 key;
1242         void *slot;
1243         int rc;
1244
1245         key = sid_to_key(s_id);
1246         pr_debug("set_sess_by_s_id: %06x\n", key);
1247
1248         slot = btree_lookup32(&lport->lport_fcport_map, key);
1249         if (!slot) {
1250                 if (new_se_nacl) {
1251                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1252                         nacl->nport_id = key;
1253                         rc = btree_insert32(&lport->lport_fcport_map, key,
1254                                         new_se_nacl, GFP_ATOMIC);
1255                         if (rc)
1256                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1257                                     (int)key);
1258                 } else {
1259                         pr_debug("Wiping nonexisting fc_port entry\n");
1260                 }
1261
1262                 fc_port->se_sess = se_sess;
1263                 nacl->fc_port = fc_port;
1264                 return;
1265         }
1266
1267         if (nacl->fc_port) {
1268                 if (new_se_nacl == NULL) {
1269                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1270                         btree_remove32(&lport->lport_fcport_map, key);
1271                         nacl->fc_port = NULL;
1272                         return;
1273                 }
1274                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1275                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1276                 fc_port->se_sess = se_sess;
1277                 nacl->fc_port = fc_port;
1278                 return;
1279         }
1280
1281         if (new_se_nacl == NULL) {
1282                 pr_debug("Clearing existing fc_port entry\n");
1283                 btree_remove32(&lport->lport_fcport_map, key);
1284                 return;
1285         }
1286
1287         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1288         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1289         fc_port->se_sess = se_sess;
1290         nacl->fc_port = fc_port;
1291
1292         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1293             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1294 }
1295
1296 /*
1297  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1298  */
1299 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1300         scsi_qla_host_t *vha,
1301         const uint16_t loop_id)
1302 {
1303         struct tcm_qla2xxx_lport *lport;
1304         struct se_node_acl *se_nacl;
1305         struct tcm_qla2xxx_nacl *nacl;
1306         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1307
1308         lport = vha->vha_tgt.target_lport_ptr;
1309         if (!lport) {
1310                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1311                 dump_stack();
1312                 return NULL;
1313         }
1314
1315         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1316
1317         fc_loopid = lport->lport_loopid_map + loop_id;
1318         se_nacl = fc_loopid->se_nacl;
1319         if (!se_nacl) {
1320                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1321                     loop_id);
1322                 return NULL;
1323         }
1324
1325         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1326
1327         if (!nacl->fc_port) {
1328                 pr_err("Unable to locate struct fc_port\n");
1329                 return NULL;
1330         }
1331
1332         return nacl->fc_port;
1333 }
1334
1335 /*
1336  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1337  */
1338 static void tcm_qla2xxx_set_sess_by_loop_id(
1339         struct tcm_qla2xxx_lport *lport,
1340         struct se_node_acl *new_se_nacl,
1341         struct tcm_qla2xxx_nacl *nacl,
1342         struct se_session *se_sess,
1343         struct fc_port *fc_port,
1344         uint16_t loop_id)
1345 {
1346         struct se_node_acl *saved_nacl;
1347         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1348
1349         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1350
1351         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1352                         lport->lport_loopid_map)[loop_id];
1353
1354         saved_nacl = fc_loopid->se_nacl;
1355         if (!saved_nacl) {
1356                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1357                 fc_loopid->se_nacl = new_se_nacl;
1358                 if (fc_port->se_sess != se_sess)
1359                         fc_port->se_sess = se_sess;
1360                 if (nacl->fc_port != fc_port)
1361                         nacl->fc_port = fc_port;
1362                 return;
1363         }
1364
1365         if (nacl->fc_port) {
1366                 if (new_se_nacl == NULL) {
1367                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1368                         fc_loopid->se_nacl = NULL;
1369                         nacl->fc_port = NULL;
1370                         return;
1371                 }
1372
1373                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1374                 fc_loopid->se_nacl = new_se_nacl;
1375                 if (fc_port->se_sess != se_sess)
1376                         fc_port->se_sess = se_sess;
1377                 if (nacl->fc_port != fc_port)
1378                         nacl->fc_port = fc_port;
1379                 return;
1380         }
1381
1382         if (new_se_nacl == NULL) {
1383                 pr_debug("Clearing fc_loopid->se_nacl\n");
1384                 fc_loopid->se_nacl = NULL;
1385                 return;
1386         }
1387
1388         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1389         fc_loopid->se_nacl = new_se_nacl;
1390         if (fc_port->se_sess != se_sess)
1391                 fc_port->se_sess = se_sess;
1392         if (nacl->fc_port != fc_port)
1393                 nacl->fc_port = fc_port;
1394
1395         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1396             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1397 }
1398
1399 /*
1400  * Should always be called with qla_hw_data->tgt.sess_lock held.
1401  */
1402 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1403                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1404 {
1405         struct se_session *se_sess = sess->se_sess;
1406         unsigned char be_sid[3];
1407
1408         be_sid[0] = sess->d_id.b.domain;
1409         be_sid[1] = sess->d_id.b.area;
1410         be_sid[2] = sess->d_id.b.al_pa;
1411
1412         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1413                                 sess, be_sid);
1414         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1415                                 sess, sess->loop_id);
1416 }
1417
1418 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1419 {
1420         struct qla_tgt *tgt = sess->tgt;
1421         struct qla_hw_data *ha = tgt->ha;
1422         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1423         struct se_session *se_sess;
1424         struct tcm_qla2xxx_lport *lport;
1425
1426         BUG_ON(in_interrupt());
1427
1428         se_sess = sess->se_sess;
1429         if (!se_sess) {
1430                 pr_err("struct fc_port->se_sess is NULL\n");
1431                 dump_stack();
1432                 return;
1433         }
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;
1440         }
1441         target_wait_for_sess_cmds(se_sess);
1442
1443         transport_deregister_session_configfs(sess->se_sess);
1444         transport_deregister_session(sess->se_sess);
1445 }
1446
1447 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1448                                   struct se_session *se_sess, void *p)
1449 {
1450         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1451                                 struct tcm_qla2xxx_tpg, se_tpg);
1452         struct tcm_qla2xxx_lport *lport = tpg->lport;
1453         struct qla_hw_data *ha = lport->qla_vha->hw;
1454         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1455         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1456                                 struct tcm_qla2xxx_nacl, se_node_acl);
1457         struct fc_port *qlat_sess = p;
1458         uint16_t loop_id = qlat_sess->loop_id;
1459         unsigned long flags;
1460         unsigned char be_sid[3];
1461
1462         be_sid[0] = qlat_sess->d_id.b.domain;
1463         be_sid[1] = qlat_sess->d_id.b.area;
1464         be_sid[2] = qlat_sess->d_id.b.al_pa;
1465
1466         /*
1467          * And now setup se_nacl and session pointers into HW lport internal
1468          * mappings for fabric S_ID and LOOP_ID.
1469          */
1470         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1471         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1472                                      se_sess, qlat_sess, be_sid);
1473         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1474                                         se_sess, qlat_sess, loop_id);
1475         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1476
1477         return 0;
1478 }
1479
1480 /*
1481  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1482  * to locate struct se_node_acl
1483  */
1484 static int tcm_qla2xxx_check_initiator_node_acl(
1485         scsi_qla_host_t *vha,
1486         unsigned char *fc_wwpn,
1487         struct fc_port *qlat_sess)
1488 {
1489         struct qla_hw_data *ha = vha->hw;
1490         struct tcm_qla2xxx_lport *lport;
1491         struct tcm_qla2xxx_tpg *tpg;
1492         struct se_session *se_sess;
1493         unsigned char port_name[36];
1494         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1495                        TCM_QLA2XXX_DEFAULT_TAGS;
1496
1497         lport = vha->vha_tgt.target_lport_ptr;
1498         if (!lport) {
1499                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1500                 dump_stack();
1501                 return -EINVAL;
1502         }
1503         /*
1504          * Locate the TPG=1 reference..
1505          */
1506         tpg = lport->tpg_1;
1507         if (!tpg) {
1508                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1509                 return -EINVAL;
1510         }
1511         /*
1512          * Format the FCP Initiator port_name into colon seperated values to
1513          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1514          */
1515         memset(&port_name, 0, 36);
1516         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1517         /*
1518          * Locate our struct se_node_acl either from an explict NodeACL created
1519          * via ConfigFS, or via running in TPG demo mode.
1520          */
1521         se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1522                                        sizeof(struct qla_tgt_cmd),
1523                                        TARGET_PROT_ALL, port_name,
1524                                        qlat_sess, tcm_qla2xxx_session_cb);
1525         if (IS_ERR(se_sess))
1526                 return PTR_ERR(se_sess);
1527
1528         return 0;
1529 }
1530
1531 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1532                                     uint16_t loop_id, bool conf_compl_supported)
1533 {
1534         struct qla_tgt *tgt = sess->tgt;
1535         struct qla_hw_data *ha = tgt->ha;
1536         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1537         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1538         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1539         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1540                         struct tcm_qla2xxx_nacl, se_node_acl);
1541         u32 key;
1542
1543
1544         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1545                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1546                     sess, sess->port_name,
1547                     sess->loop_id, loop_id, sess->d_id.b.domain,
1548                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1549                     s_id.b.area, s_id.b.al_pa);
1550
1551         if (sess->loop_id != loop_id) {
1552                 /*
1553                  * Because we can shuffle loop IDs around and we
1554                  * update different sessions non-atomically, we might
1555                  * have overwritten this session's old loop ID
1556                  * already, and we might end up overwriting some other
1557                  * session that will be updated later.  So we have to
1558                  * be extra careful and we can't warn about those things...
1559                  */
1560                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1561                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1562
1563                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1564
1565                 sess->loop_id = loop_id;
1566         }
1567
1568         if (sess->d_id.b24 != s_id.b24) {
1569                 key = (((u32) sess->d_id.b.domain << 16) |
1570                        ((u32) sess->d_id.b.area   <<  8) |
1571                        ((u32) sess->d_id.b.al_pa));
1572
1573                 if (btree_lookup32(&lport->lport_fcport_map, key))
1574                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1575                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1576                             sess->d_id.b.domain, sess->d_id.b.area,
1577                             sess->d_id.b.al_pa);
1578                 else
1579                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1580                              sess->d_id.b.domain, sess->d_id.b.area,
1581                              sess->d_id.b.al_pa);
1582
1583                 key = (((u32) s_id.b.domain << 16) |
1584                        ((u32) s_id.b.area   <<  8) |
1585                        ((u32) s_id.b.al_pa));
1586
1587                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1588                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1589                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1590                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1591                 } else {
1592                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1593                             GFP_ATOMIC);
1594                 }
1595
1596                 sess->d_id = s_id;
1597                 nacl->nport_id = key;
1598         }
1599
1600         sess->conf_compl_supported = conf_compl_supported;
1601
1602         /* Reset logout parameters to default */
1603         sess->logout_on_delete = 1;
1604         sess->keep_nport_handle = 0;
1605 }
1606
1607 /*
1608  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1609  */
1610 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1611         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1612         .handle_data            = tcm_qla2xxx_handle_data,
1613         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1614         .free_cmd               = tcm_qla2xxx_free_cmd,
1615         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1616         .free_session           = tcm_qla2xxx_free_session,
1617         .update_sess            = tcm_qla2xxx_update_sess,
1618         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1619         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1620         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1621         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1622         .put_sess               = tcm_qla2xxx_put_sess,
1623         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1624         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1625         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1626 };
1627
1628 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1629 {
1630         int rc;
1631
1632         rc = btree_init32(&lport->lport_fcport_map);
1633         if (rc) {
1634                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1635                 return rc;
1636         }
1637
1638         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1639                                 65536);
1640         if (!lport->lport_loopid_map) {
1641                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1642                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1643                 btree_destroy32(&lport->lport_fcport_map);
1644                 return -ENOMEM;
1645         }
1646         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1647                * 65536);
1648         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1649                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1650         return 0;
1651 }
1652
1653 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1654                                          void *target_lport_ptr,
1655                                          u64 npiv_wwpn, u64 npiv_wwnn)
1656 {
1657         struct qla_hw_data *ha = vha->hw;
1658         struct tcm_qla2xxx_lport *lport =
1659                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1660         /*
1661          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1662          */
1663         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1664         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1665         lport->qla_vha = vha;
1666
1667         return 0;
1668 }
1669
1670 static struct se_wwn *tcm_qla2xxx_make_lport(
1671         struct target_fabric_configfs *tf,
1672         struct config_group *group,
1673         const char *name)
1674 {
1675         struct tcm_qla2xxx_lport *lport;
1676         u64 wwpn;
1677         int ret = -ENODEV;
1678
1679         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1680                 return ERR_PTR(-EINVAL);
1681
1682         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1683         if (!lport) {
1684                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1685                 return ERR_PTR(-ENOMEM);
1686         }
1687         lport->lport_wwpn = wwpn;
1688         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1689                                 wwpn);
1690         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1691
1692         ret = tcm_qla2xxx_init_lport(lport);
1693         if (ret != 0)
1694                 goto out;
1695
1696         ret = qlt_lport_register(lport, wwpn, 0, 0,
1697                                  tcm_qla2xxx_lport_register_cb);
1698         if (ret != 0)
1699                 goto out_lport;
1700
1701         return &lport->lport_wwn;
1702 out_lport:
1703         vfree(lport->lport_loopid_map);
1704         btree_destroy32(&lport->lport_fcport_map);
1705 out:
1706         kfree(lport);
1707         return ERR_PTR(ret);
1708 }
1709
1710 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1711 {
1712         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1713                         struct tcm_qla2xxx_lport, lport_wwn);
1714         struct scsi_qla_host *vha = lport->qla_vha;
1715         struct se_node_acl *node;
1716         u32 key = 0;
1717
1718         /*
1719          * Call into qla2x_target.c LLD logic to complete the
1720          * shutdown of struct qla_tgt after the call to
1721          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1722          */
1723         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1724                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1725
1726         qlt_lport_deregister(vha);
1727
1728         vfree(lport->lport_loopid_map);
1729         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1730                 btree_remove32(&lport->lport_fcport_map, key);
1731         btree_destroy32(&lport->lport_fcport_map);
1732         kfree(lport);
1733 }
1734
1735 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1736                                               void *target_lport_ptr,
1737                                               u64 npiv_wwpn, u64 npiv_wwnn)
1738 {
1739         struct fc_vport *vport;
1740         struct Scsi_Host *sh = base_vha->host;
1741         struct scsi_qla_host *npiv_vha;
1742         struct tcm_qla2xxx_lport *lport =
1743                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1744         struct tcm_qla2xxx_lport *base_lport =
1745                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1746         struct fc_vport_identifiers vport_id;
1747
1748         if (qla_ini_mode_enabled(base_vha)) {
1749                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1750                 return -EPERM;
1751         }
1752
1753         if (!base_lport || !base_lport->tpg_1 ||
1754             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1755                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1756                 return -EPERM;
1757         }
1758
1759         memset(&vport_id, 0, sizeof(vport_id));
1760         vport_id.port_name = npiv_wwpn;
1761         vport_id.node_name = npiv_wwnn;
1762         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1763         vport_id.vport_type = FC_PORTTYPE_NPIV;
1764         vport_id.disable = false;
1765
1766         vport = fc_vport_create(sh, 0, &vport_id);
1767         if (!vport) {
1768                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1769                 return -ENODEV;
1770         }
1771         /*
1772          * Setup local pointer to NPIV vhba + target_lport_ptr
1773          */
1774         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1775         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1776         lport->qla_vha = npiv_vha;
1777         scsi_host_get(npiv_vha->host);
1778         return 0;
1779 }
1780
1781
1782 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1783         struct target_fabric_configfs *tf,
1784         struct config_group *group,
1785         const char *name)
1786 {
1787         struct tcm_qla2xxx_lport *lport;
1788         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1789         char *p, tmp[128];
1790         int ret;
1791
1792         snprintf(tmp, 128, "%s", name);
1793
1794         p = strchr(tmp, '@');
1795         if (!p) {
1796                 pr_err("Unable to locate NPIV '@' separator\n");
1797                 return ERR_PTR(-EINVAL);
1798         }
1799         *p++ = '\0';
1800
1801         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1802                 return ERR_PTR(-EINVAL);
1803
1804         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1805                                        &npiv_wwpn, &npiv_wwnn) < 0)
1806                 return ERR_PTR(-EINVAL);
1807
1808         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1809         if (!lport) {
1810                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1811                 return ERR_PTR(-ENOMEM);
1812         }
1813         lport->lport_npiv_wwpn = npiv_wwpn;
1814         lport->lport_npiv_wwnn = npiv_wwnn;
1815         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1816
1817         ret = tcm_qla2xxx_init_lport(lport);
1818         if (ret != 0)
1819                 goto out;
1820
1821         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1822                                  tcm_qla2xxx_lport_register_npiv_cb);
1823         if (ret != 0)
1824                 goto out_lport;
1825
1826         return &lport->lport_wwn;
1827 out_lport:
1828         vfree(lport->lport_loopid_map);
1829         btree_destroy32(&lport->lport_fcport_map);
1830 out:
1831         kfree(lport);
1832         return ERR_PTR(ret);
1833 }
1834
1835 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1836 {
1837         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1838                         struct tcm_qla2xxx_lport, lport_wwn);
1839         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1840         struct qla_hw_data *ha = npiv_vha->hw;
1841         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1842
1843         scsi_host_put(npiv_vha->host);
1844         /*
1845          * Notify libfc that we want to release the vha->fc_vport
1846          */
1847         fc_vport_terminate(npiv_vha->fc_vport);
1848         scsi_host_put(base_vha->host);
1849         kfree(lport);
1850 }
1851
1852
1853 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1854                 char *page)
1855 {
1856         return sprintf(page,
1857             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1858             QLA2XXX_VERSION, utsname()->sysname,
1859             utsname()->machine, utsname()->release);
1860 }
1861
1862 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1863
1864 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1865         &tcm_qla2xxx_wwn_attr_version,
1866         NULL,
1867 };
1868
1869 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1870         .module                         = THIS_MODULE,
1871         .name                           = "qla2xxx",
1872         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1873         /*
1874          * XXX: Limit assumes single page per scatter-gather-list entry.
1875          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1876          */
1877         .max_data_sg_nents              = 1200,
1878         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1879         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1880         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1881         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1882         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1883         .tpg_check_demo_mode_write_protect =
1884                                         tcm_qla2xxx_check_demo_write_protect,
1885         .tpg_check_prod_mode_write_protect =
1886                                         tcm_qla2xxx_check_prod_write_protect,
1887         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1888         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1889         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1890         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1891         .release_cmd                    = tcm_qla2xxx_release_cmd,
1892         .close_session                  = tcm_qla2xxx_close_session,
1893         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1894         .sess_get_initiator_sid         = NULL,
1895         .write_pending                  = tcm_qla2xxx_write_pending,
1896         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1897         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1898         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1899         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1900         .queue_status                   = tcm_qla2xxx_queue_status,
1901         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1902         .aborted_task                   = tcm_qla2xxx_aborted_task,
1903         /*
1904          * Setup function pointers for generic logic in
1905          * target_core_fabric_configfs.c
1906          */
1907         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1908         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1909         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1910         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1911         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1912
1913         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1914         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1915         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1916 };
1917
1918 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1919         .module                         = THIS_MODULE,
1920         .name                           = "qla2xxx_npiv",
1921         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1922         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1923         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1924         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1925         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1926         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1927         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1928         .tpg_check_prod_mode_write_protect =
1929             tcm_qla2xxx_check_prod_write_protect,
1930         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1931         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1932         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1933         .release_cmd                    = tcm_qla2xxx_release_cmd,
1934         .close_session                  = tcm_qla2xxx_close_session,
1935         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1936         .sess_get_initiator_sid         = NULL,
1937         .write_pending                  = tcm_qla2xxx_write_pending,
1938         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1939         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1940         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1941         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1942         .queue_status                   = tcm_qla2xxx_queue_status,
1943         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1944         .aborted_task                   = tcm_qla2xxx_aborted_task,
1945         /*
1946          * Setup function pointers for generic logic in
1947          * target_core_fabric_configfs.c
1948          */
1949         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1950         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1951         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1952         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1953         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1954
1955         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1956         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1957 };
1958
1959 static int tcm_qla2xxx_register_configfs(void)
1960 {
1961         int ret;
1962
1963         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1964             QLA2XXX_VERSION, utsname()->sysname,
1965             utsname()->machine, utsname()->release);
1966
1967         ret = target_register_template(&tcm_qla2xxx_ops);
1968         if (ret)
1969                 return ret;
1970
1971         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1972         if (ret)
1973                 goto out_fabric;
1974
1975         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1976                                                 WQ_MEM_RECLAIM, 0);
1977         if (!tcm_qla2xxx_free_wq) {
1978                 ret = -ENOMEM;
1979                 goto out_fabric_npiv;
1980         }
1981
1982         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1983         if (!tcm_qla2xxx_cmd_wq) {
1984                 ret = -ENOMEM;
1985                 goto out_free_wq;
1986         }
1987
1988         return 0;
1989
1990 out_free_wq:
1991         destroy_workqueue(tcm_qla2xxx_free_wq);
1992 out_fabric_npiv:
1993         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1994 out_fabric:
1995         target_unregister_template(&tcm_qla2xxx_ops);
1996         return ret;
1997 }
1998
1999 static void tcm_qla2xxx_deregister_configfs(void)
2000 {
2001         destroy_workqueue(tcm_qla2xxx_cmd_wq);
2002         destroy_workqueue(tcm_qla2xxx_free_wq);
2003
2004         target_unregister_template(&tcm_qla2xxx_ops);
2005         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2006 }
2007
2008 static int __init tcm_qla2xxx_init(void)
2009 {
2010         int ret;
2011
2012         ret = tcm_qla2xxx_register_configfs();
2013         if (ret < 0)
2014                 return ret;
2015
2016         return 0;
2017 }
2018
2019 static void __exit tcm_qla2xxx_exit(void)
2020 {
2021         tcm_qla2xxx_deregister_configfs();
2022 }
2023
2024 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2025 MODULE_LICENSE("GPL");
2026 module_init(tcm_qla2xxx_init);
2027 module_exit(tcm_qla2xxx_exit);