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         unsigned long flags;
 504
 505         /*
 506          * Ensure that the complete FCP WRITE payload has been received.
 507          * Otherwise return an exception via CHECK_CONDITION status.
 508          */
 509         cmd->cmd_in_wq = 0;
 510
 511         spin_lock_irqsave(&cmd->cmd_lock, flags);
 512         cmd->data_work = 1;
 513         if (cmd->aborted) {
 514                 cmd->data_work_free = 1;
 515                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 516
 517                 tcm_qla2xxx_free_cmd(cmd);
 518                 return;
 519         }
 520         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 521
 522         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 523         if (!cmd->write_data_transferred) {
 524                 /*
 525                  * Check if se_cmd has already been aborted via LUN_RESET, and
 526                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 527                  */
 528                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 529                         complete(&cmd->se_cmd.t_transport_stop_comp);
 530                         return;
 531                 }
 532
 533                 switch (cmd->dif_err_code) {
 534                 case DIF_ERR_GRD:
 535                         cmd->se_cmd.pi_err =
 536                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 537                         break;
 538                 case DIF_ERR_REF:
 539                         cmd->se_cmd.pi_err =
 540                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 541                         break;
 542                 case DIF_ERR_APP:
 543                         cmd->se_cmd.pi_err =
 544                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 545                         break;
 546                 case DIF_ERR_NONE:
 547                 default:
 548                         break;
 549                 }
 550
 551                 if (cmd->se_cmd.pi_err)
 552                         transport_generic_request_failure(&cmd->se_cmd,
 553                                 cmd->se_cmd.pi_err);
 554                 else
 555                         transport_generic_request_failure(&cmd->se_cmd,
 556                                 TCM_CHECK_CONDITION_ABORT_CMD);
 557
 558                 return;
 559         }
 560
 561         return target_execute_cmd(&cmd->se_cmd);
 562 }
 563
 564 /*
 565  * Called from qla_target.c:qlt_do_ctio_completion()
 566  */
 567 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 568 {
 569         cmd->trc_flags |= TRC_DATA_IN;
 570         cmd->cmd_in_wq = 1;
 571         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 572         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 573 }
 574
 575 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 576 {
 577         return 0;
 578 }
 579
 580 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 581     uint16_t *pfw_prot_opts)
 582 {
 583         struct se_cmd *se_cmd = &cmd->se_cmd;
 584
 585         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 586                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 587
 588         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 589                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 590
 591         return 0;
 592 }
 593
 594 /*
 595  * Called from qla_target.c:qlt_issue_task_mgmt()
 596  */
 597 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 598         uint16_t tmr_func, uint32_t tag)
 599 {
 600         struct fc_port *sess = mcmd->sess;
 601         struct se_cmd *se_cmd = &mcmd->se_cmd;
 602         int transl_tmr_func = 0;
 603         int flags = TARGET_SCF_ACK_KREF;
 604
 605         switch (tmr_func) {
 606         case QLA_TGT_ABTS:
 607                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 608                 transl_tmr_func = TMR_ABORT_TASK;
 609                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 610                 break;
 611         case QLA_TGT_2G_ABORT_TASK:
 612                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 613                 transl_tmr_func = TMR_ABORT_TASK;
 614                 break;
 615         case QLA_TGT_CLEAR_ACA:
 616                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 617                 transl_tmr_func = TMR_CLEAR_ACA;
 618                 break;
 619         case QLA_TGT_TARGET_RESET:
 620                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 621                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 622                 break;
 623         case QLA_TGT_LUN_RESET:
 624                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 625                 transl_tmr_func = TMR_LUN_RESET;
 626                 break;
 627         case QLA_TGT_CLEAR_TS:
 628                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 629                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 630                 break;
 631         case QLA_TGT_ABORT_TS:
 632                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 633                 transl_tmr_func = TMR_ABORT_TASK_SET;
 634                 break;
 635         default:
 636                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 637                     sess->vha->host_no, tmr_func);
 638                 return -ENOSYS;
 639         }
 640
 641         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 642             transl_tmr_func, GFP_ATOMIC, tag, flags);
 643 }
 644
 645 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 646 {
 647         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 648                                 struct qla_tgt_cmd, se_cmd);
 649
 650         if (cmd->aborted) {
 651                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 652                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 653                  * already kick start the free.
 654                  */
 655                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 656                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 657                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 658                         cmd->se_cmd.transport_state,
 659                         cmd->se_cmd.t_state,
 660                         cmd->se_cmd.se_cmd_flags);
 661                 return 0;
 662         }
 663
 664         cmd->trc_flags |= TRC_XMIT_DATA;
 665         cmd->bufflen = se_cmd->data_length;
 666         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 667
 668         cmd->sg_cnt = se_cmd->t_data_nents;
 669         cmd->sg = se_cmd->t_data_sg;
 670         cmd->offset = 0;
 671
 672         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 673         cmd->prot_sg = se_cmd->t_prot_sg;
 674         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 675         se_cmd->pi_err = 0;
 676
 677         /*
 678          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 679          */
 680         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 681                                 se_cmd->scsi_status);
 682 }
 683
 684 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 685 {
 686         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 687                                 struct qla_tgt_cmd, se_cmd);
 688         int xmit_type = QLA_TGT_XMIT_STATUS;
 689
 690         if (cmd->aborted) {
 691                 /*
 692                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 693                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 694                  * already kick start the free.
 695                  */
 696                 pr_debug(
 697                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 698                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 699                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 700                     cmd->se_cmd.se_cmd_flags);
 701                 return 0;
 702         }
 703         cmd->bufflen = se_cmd->data_length;
 704         cmd->sg = NULL;
 705         cmd->sg_cnt = 0;
 706         cmd->offset = 0;
 707         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 708         if (cmd->trc_flags & TRC_XMIT_STATUS) {
 709                 pr_crit("Multiple calls for status = %p.\n", cmd);
 710                 dump_stack();
 711         }
 712         cmd->trc_flags |= TRC_XMIT_STATUS;
 713
 714         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 715                 /*
 716                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 717                  * for qla_tgt_xmit_response LLD code
 718                  */
 719                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 720                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 721                         se_cmd->residual_count = 0;
 722                 }
 723                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 724                 se_cmd->residual_count += se_cmd->data_length;
 725
 726                 cmd->bufflen = 0;
 727         }
 728         /*
 729          * Now queue status response to qla2xxx LLD code and response ring
 730          */
 731         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 732 }
 733
 734 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 735 {
 736         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 737         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 738                                 struct qla_tgt_mgmt_cmd, se_cmd);
 739
 740         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 741                         mcmd, se_tmr->function, se_tmr->response);
 742         /*
 743          * Do translation between TCM TM response codes and
 744          * QLA2xxx FC TM response codes.
 745          */
 746         switch (se_tmr->response) {
 747         case TMR_FUNCTION_COMPLETE:
 748                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 749                 break;
 750         case TMR_TASK_DOES_NOT_EXIST:
 751                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 752                 break;
 753         case TMR_FUNCTION_REJECTED:
 754                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 755                 break;
 756         case TMR_LUN_DOES_NOT_EXIST:
 757         default:
 758                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 759                 break;
 760         }
 761         /*
 762          * Queue the TM response to QLA2xxx LLD to build a
 763          * CTIO response packet.
 764          */
 765         qlt_xmit_tm_rsp(mcmd);
 766 }
 767
 768 #define DATA_WORK_NOT_FREE(_cmd) (_cmd->data_work && !_cmd->data_work_free)
 769 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 770 {
 771         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 772                                 struct qla_tgt_cmd, se_cmd);
 773         unsigned long flags;
 774
 775         if (qlt_abort_cmd(cmd))
 776                 return;
 777
 778         spin_lock_irqsave(&cmd->cmd_lock, flags);
 779         if ((cmd->state == QLA_TGT_STATE_NEW)||
 780             ((cmd->state == QLA_TGT_STATE_DATA_IN) &&
 781                 DATA_WORK_NOT_FREE(cmd))) {
 782                 cmd->data_work_free = 1;
 783                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 784                 /*
 785                  * cmd has not reached fw, Use this trigger to free it.
 786                  */
 787                 tcm_qla2xxx_free_cmd(cmd);
 788                 return;
 789         }
 790         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 791         return;
 792
 793 }
 794
 795 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 796                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 797 /*
 798  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 799  */
 800 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 801 {
 802         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 803         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 804         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 805         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 806                                 struct tcm_qla2xxx_lport, lport_wwn);
 807         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 808                                 struct tcm_qla2xxx_nacl, se_node_acl);
 809         void *node;
 810
 811         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 812
 813         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 814         if (WARN_ON(node && (node != se_nacl))) {
 815                 /*
 816                  * The nacl no longer matches what we think it should be.
 817                  * Most likely a new dynamic acl has been added while
 818                  * someone dropped the hardware lock.  It clearly is a
 819                  * bug elsewhere, but this bit can't make things worse.
 820                  */
 821                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 822                                node, GFP_ATOMIC);
 823         }
 824
 825         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 826             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 827         /*
 828          * Now clear the se_nacl and session pointers from our HW lport lookup
 829          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 830          *
 831          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 832          * target_wait_for_sess_cmds() before the session waits for outstanding
 833          * I/O to complete, to avoid a race between session shutdown execution
 834          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 835          */
 836         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 837 }
 838
 839 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 840 {
 841         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 842         target_sess_cmd_list_set_waiting(sess->se_sess);
 843 }
 844
 845 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 846                 const char *name)
 847 {
 848         struct tcm_qla2xxx_nacl *nacl =
 849                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 850         u64 wwnn;
 851
 852         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 853                 return -EINVAL;
 854
 855         nacl->nport_wwnn = wwnn;
 856         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 857
 858         return 0;
 859 }
 860
 861 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 862
 863 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 864                                                                         \
 865 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 866                 struct config_item *item, char *page)                   \
 867 {                                                                       \
 868         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 869         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 870                         struct tcm_qla2xxx_tpg, se_tpg);                \
 871                                                                         \
 872         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 873 }                                                                       \
 874                                                                         \
 875 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 876                 struct config_item *item, const char *page, size_t count) \
 877 {                                                                       \
 878         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 879         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 880                         struct tcm_qla2xxx_tpg, se_tpg);                \
 881         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 882         unsigned long val;                                              \
 883         int ret;                                                        \
 884                                                                         \
 885         ret = kstrtoul(page, 0, &val);                                  \
 886         if (ret < 0) {                                                  \
 887                 pr_err("kstrtoul() failed with"                         \
 888                                 " ret: %d\n", ret);                     \
 889                 return -EINVAL;                                         \
 890         }                                                               \
 891                                                                         \
 892         if ((val != 0) && (val != 1)) {                                 \
 893                 pr_err("Illegal boolean value %lu\n", val);             \
 894                 return -EINVAL;                                         \
 895         }                                                               \
 896                                                                         \
 897         a->name = val;                                                  \
 898                                                                         \
 899         return count;                                                   \
 900 }                                                                       \
 901 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 902
 903 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 904 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 905 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 906 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 907 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 908 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 909 DEF_QLA_TPG_ATTRIB(jam_host);
 910 #endif
 911
 912 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 913         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 914         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 915         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 916         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 917         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 918 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 919         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 920 #endif
 921         NULL,
 922 };
 923
 924 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 925
 926 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 927                 char *page)
 928 {
 929         struct se_portal_group *se_tpg = to_tpg(item);
 930         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 931                         struct tcm_qla2xxx_tpg, se_tpg);
 932
 933         return snprintf(page, PAGE_SIZE, "%d\n",
 934                         atomic_read(&tpg->lport_tpg_enabled));
 935 }
 936
 937 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 938 {
 939         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 940                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 941         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 942         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 943
 944         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 945                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 946                 qlt_enable_vha(base_vha);
 947         }
 948         complete(&base_tpg->tpg_base_comp);
 949 }
 950
 951 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 952 {
 953         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 954                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 955         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 956         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 957
 958         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 959                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 960                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 961         }
 962         complete(&base_tpg->tpg_base_comp);
 963 }
 964
 965 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 966                 const char *page, size_t count)
 967 {
 968         struct se_portal_group *se_tpg = to_tpg(item);
 969         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 970                         struct tcm_qla2xxx_tpg, se_tpg);
 971         unsigned long op;
 972         int rc;
 973
 974         rc = kstrtoul(page, 0, &op);
 975         if (rc < 0) {
 976                 pr_err("kstrtoul() returned %d\n", rc);
 977                 return -EINVAL;
 978         }
 979         if ((op != 1) && (op != 0)) {
 980                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 981                 return -EINVAL;
 982         }
 983         if (op) {
 984                 if (atomic_read(&tpg->lport_tpg_enabled))
 985                         return -EEXIST;
 986
 987                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 988         } else {
 989                 if (!atomic_read(&tpg->lport_tpg_enabled))
 990                         return count;
 991
 992                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 993         }
 994         init_completion(&tpg->tpg_base_comp);
 995         schedule_work(&tpg->tpg_base_work);
 996         wait_for_completion(&tpg->tpg_base_comp);
 997
 998         if (op) {
 999                 if (!atomic_read(&tpg->lport_tpg_enabled))
1000                         return -ENODEV;
1001         } else {
1002                 if (atomic_read(&tpg->lport_tpg_enabled))
1003                         return -EPERM;
1004         }
1005         return count;
1006 }
1007
1008 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
1009                 char *page)
1010 {
1011         return target_show_dynamic_sessions(to_tpg(item), page);
1012 }
1013
1014 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
1015                 const char *page, size_t count)
1016 {
1017         struct se_portal_group *se_tpg = to_tpg(item);
1018         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1019                                 struct tcm_qla2xxx_tpg, se_tpg);
1020         unsigned long val;
1021         int ret = kstrtoul(page, 0, &val);
1022
1023         if (ret) {
1024                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
1025                 return ret;
1026         }
1027         if (val != 0 && val != 1 && val != 3) {
1028                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
1029                 return -EINVAL;
1030         }
1031         tpg->tpg_attrib.fabric_prot_type = val;
1032
1033         return count;
1034 }
1035
1036 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1037                 char *page)
1038 {
1039         struct se_portal_group *se_tpg = to_tpg(item);
1040         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1041                                 struct tcm_qla2xxx_tpg, se_tpg);
1042
1043         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1044 }
1045
1046 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1047 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1048 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1049
1050 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1051         &tcm_qla2xxx_tpg_attr_enable,
1052         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1053         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1054         NULL,
1055 };
1056
1057 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1058         struct se_wwn *wwn,
1059         struct config_group *group,
1060         const char *name)
1061 {
1062         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1063                         struct tcm_qla2xxx_lport, lport_wwn);
1064         struct tcm_qla2xxx_tpg *tpg;
1065         unsigned long tpgt;
1066         int ret;
1067
1068         if (strstr(name, "tpgt_") != name)
1069                 return ERR_PTR(-EINVAL);
1070         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1071                 return ERR_PTR(-EINVAL);
1072
1073         if ((tpgt != 1)) {
1074                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1075                 return ERR_PTR(-ENOSYS);
1076         }
1077
1078         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1079         if (!tpg) {
1080                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1081                 return ERR_PTR(-ENOMEM);
1082         }
1083         tpg->lport = lport;
1084         tpg->lport_tpgt = tpgt;
1085         /*
1086          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1087          * NodeACLs
1088          */
1089         tpg->tpg_attrib.generate_node_acls = 1;
1090         tpg->tpg_attrib.demo_mode_write_protect = 1;
1091         tpg->tpg_attrib.cache_dynamic_acls = 1;
1092         tpg->tpg_attrib.demo_mode_login_only = 1;
1093         tpg->tpg_attrib.jam_host = 0;
1094
1095         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1096         if (ret < 0) {
1097                 kfree(tpg);
1098                 return NULL;
1099         }
1100
1101         lport->tpg_1 = tpg;
1102
1103         return &tpg->se_tpg;
1104 }
1105
1106 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1107 {
1108         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1109                         struct tcm_qla2xxx_tpg, se_tpg);
1110         struct tcm_qla2xxx_lport *lport = tpg->lport;
1111         struct scsi_qla_host *vha = lport->qla_vha;
1112         /*
1113          * Call into qla2x_target.c LLD logic to shutdown the active
1114          * FC Nexuses and disable target mode operation for this qla_hw_data
1115          */
1116         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1117                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1118
1119         core_tpg_deregister(se_tpg);
1120         /*
1121          * Clear local TPG=1 pointer for non NPIV mode.
1122          */
1123         lport->tpg_1 = NULL;
1124         kfree(tpg);
1125 }
1126
1127 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1128                 char *page)
1129 {
1130         return tcm_qla2xxx_tpg_enable_show(item, page);
1131 }
1132
1133 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1134                 const char *page, size_t count)
1135 {
1136         struct se_portal_group *se_tpg = to_tpg(item);
1137         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1138         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1139                         struct tcm_qla2xxx_lport, lport_wwn);
1140         struct scsi_qla_host *vha = lport->qla_vha;
1141         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1142                         struct tcm_qla2xxx_tpg, se_tpg);
1143         unsigned long op;
1144         int rc;
1145
1146         rc = kstrtoul(page, 0, &op);
1147         if (rc < 0) {
1148                 pr_err("kstrtoul() returned %d\n", rc);
1149                 return -EINVAL;
1150         }
1151         if ((op != 1) && (op != 0)) {
1152                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1153                 return -EINVAL;
1154         }
1155         if (op) {
1156                 if (atomic_read(&tpg->lport_tpg_enabled))
1157                         return -EEXIST;
1158
1159                 atomic_set(&tpg->lport_tpg_enabled, 1);
1160                 qlt_enable_vha(vha);
1161         } else {
1162                 if (!atomic_read(&tpg->lport_tpg_enabled))
1163                         return count;
1164
1165                 atomic_set(&tpg->lport_tpg_enabled, 0);
1166                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1167         }
1168
1169         return count;
1170 }
1171
1172 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1173
1174 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1175         &tcm_qla2xxx_npiv_tpg_attr_enable,
1176         NULL,
1177 };
1178
1179 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1180         struct se_wwn *wwn,
1181         struct config_group *group,
1182         const char *name)
1183 {
1184         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1185                         struct tcm_qla2xxx_lport, lport_wwn);
1186         struct tcm_qla2xxx_tpg *tpg;
1187         unsigned long tpgt;
1188         int ret;
1189
1190         if (strstr(name, "tpgt_") != name)
1191                 return ERR_PTR(-EINVAL);
1192         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1193                 return ERR_PTR(-EINVAL);
1194
1195         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1196         if (!tpg) {
1197                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1198                 return ERR_PTR(-ENOMEM);
1199         }
1200         tpg->lport = lport;
1201         tpg->lport_tpgt = tpgt;
1202
1203         /*
1204          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1205          * NodeACLs
1206          */
1207         tpg->tpg_attrib.generate_node_acls = 1;
1208         tpg->tpg_attrib.demo_mode_write_protect = 1;
1209         tpg->tpg_attrib.cache_dynamic_acls = 1;
1210         tpg->tpg_attrib.demo_mode_login_only = 1;
1211
1212         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1213         if (ret < 0) {
1214                 kfree(tpg);
1215                 return NULL;
1216         }
1217         lport->tpg_1 = tpg;
1218         return &tpg->se_tpg;
1219 }
1220
1221 /*
1222  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1223  */
1224 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1225         scsi_qla_host_t *vha,
1226         const uint8_t *s_id)
1227 {
1228         struct tcm_qla2xxx_lport *lport;
1229         struct se_node_acl *se_nacl;
1230         struct tcm_qla2xxx_nacl *nacl;
1231         u32 key;
1232
1233         lport = vha->vha_tgt.target_lport_ptr;
1234         if (!lport) {
1235                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1236                 dump_stack();
1237                 return NULL;
1238         }
1239
1240         key = sid_to_key(s_id);
1241         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1242
1243         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1244         if (!se_nacl) {
1245                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1246                 return NULL;
1247         }
1248         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1249             se_nacl, se_nacl->initiatorname);
1250
1251         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1252         if (!nacl->fc_port) {
1253                 pr_err("Unable to locate struct fc_port\n");
1254                 return NULL;
1255         }
1256
1257         return nacl->fc_port;
1258 }
1259
1260 /*
1261  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1262  */
1263 static void tcm_qla2xxx_set_sess_by_s_id(
1264         struct tcm_qla2xxx_lport *lport,
1265         struct se_node_acl *new_se_nacl,
1266         struct tcm_qla2xxx_nacl *nacl,
1267         struct se_session *se_sess,
1268         struct fc_port *fc_port,
1269         uint8_t *s_id)
1270 {
1271         u32 key;
1272         void *slot;
1273         int rc;
1274
1275         key = sid_to_key(s_id);
1276         pr_debug("set_sess_by_s_id: %06x\n", key);
1277
1278         slot = btree_lookup32(&lport->lport_fcport_map, key);
1279         if (!slot) {
1280                 if (new_se_nacl) {
1281                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1282                         nacl->nport_id = key;
1283                         rc = btree_insert32(&lport->lport_fcport_map, key,
1284                                         new_se_nacl, GFP_ATOMIC);
1285                         if (rc)
1286                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1287                                     (int)key);
1288                 } else {
1289                         pr_debug("Wiping nonexisting fc_port entry\n");
1290                 }
1291
1292                 fc_port->se_sess = se_sess;
1293                 nacl->fc_port = fc_port;
1294                 return;
1295         }
1296
1297         if (nacl->fc_port) {
1298                 if (new_se_nacl == NULL) {
1299                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1300                         btree_remove32(&lport->lport_fcport_map, key);
1301                         nacl->fc_port = NULL;
1302                         return;
1303                 }
1304                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1305                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1306                 fc_port->se_sess = se_sess;
1307                 nacl->fc_port = fc_port;
1308                 return;
1309         }
1310
1311         if (new_se_nacl == NULL) {
1312                 pr_debug("Clearing existing fc_port entry\n");
1313                 btree_remove32(&lport->lport_fcport_map, key);
1314                 return;
1315         }
1316
1317         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1318         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1319         fc_port->se_sess = se_sess;
1320         nacl->fc_port = fc_port;
1321
1322         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1323             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1324 }
1325
1326 /*
1327  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1328  */
1329 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1330         scsi_qla_host_t *vha,
1331         const uint16_t loop_id)
1332 {
1333         struct tcm_qla2xxx_lport *lport;
1334         struct se_node_acl *se_nacl;
1335         struct tcm_qla2xxx_nacl *nacl;
1336         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1337
1338         lport = vha->vha_tgt.target_lport_ptr;
1339         if (!lport) {
1340                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1341                 dump_stack();
1342                 return NULL;
1343         }
1344
1345         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1346
1347         fc_loopid = lport->lport_loopid_map + loop_id;
1348         se_nacl = fc_loopid->se_nacl;
1349         if (!se_nacl) {
1350                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1351                     loop_id);
1352                 return NULL;
1353         }
1354
1355         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1356
1357         if (!nacl->fc_port) {
1358                 pr_err("Unable to locate struct fc_port\n");
1359                 return NULL;
1360         }
1361
1362         return nacl->fc_port;
1363 }
1364
1365 /*
1366  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1367  */
1368 static void tcm_qla2xxx_set_sess_by_loop_id(
1369         struct tcm_qla2xxx_lport *lport,
1370         struct se_node_acl *new_se_nacl,
1371         struct tcm_qla2xxx_nacl *nacl,
1372         struct se_session *se_sess,
1373         struct fc_port *fc_port,
1374         uint16_t loop_id)
1375 {
1376         struct se_node_acl *saved_nacl;
1377         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1378
1379         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1380
1381         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1382                         lport->lport_loopid_map)[loop_id];
1383
1384         saved_nacl = fc_loopid->se_nacl;
1385         if (!saved_nacl) {
1386                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1387                 fc_loopid->se_nacl = new_se_nacl;
1388                 if (fc_port->se_sess != se_sess)
1389                         fc_port->se_sess = se_sess;
1390                 if (nacl->fc_port != fc_port)
1391                         nacl->fc_port = fc_port;
1392                 return;
1393         }
1394
1395         if (nacl->fc_port) {
1396                 if (new_se_nacl == NULL) {
1397                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1398                         fc_loopid->se_nacl = NULL;
1399                         nacl->fc_port = NULL;
1400                         return;
1401                 }
1402
1403                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1404                 fc_loopid->se_nacl = new_se_nacl;
1405                 if (fc_port->se_sess != se_sess)
1406                         fc_port->se_sess = se_sess;
1407                 if (nacl->fc_port != fc_port)
1408                         nacl->fc_port = fc_port;
1409                 return;
1410         }
1411
1412         if (new_se_nacl == NULL) {
1413                 pr_debug("Clearing fc_loopid->se_nacl\n");
1414                 fc_loopid->se_nacl = NULL;
1415                 return;
1416         }
1417
1418         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1419         fc_loopid->se_nacl = new_se_nacl;
1420         if (fc_port->se_sess != se_sess)
1421                 fc_port->se_sess = se_sess;
1422         if (nacl->fc_port != fc_port)
1423                 nacl->fc_port = fc_port;
1424
1425         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1426             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1427 }
1428
1429 /*
1430  * Should always be called with qla_hw_data->tgt.sess_lock held.
1431  */
1432 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1433                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1434 {
1435         struct se_session *se_sess = sess->se_sess;
1436         unsigned char be_sid[3];
1437
1438         be_sid[0] = sess->d_id.b.domain;
1439         be_sid[1] = sess->d_id.b.area;
1440         be_sid[2] = sess->d_id.b.al_pa;
1441
1442         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1443                                 sess, be_sid);
1444         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1445                                 sess, sess->loop_id);
1446 }
1447
1448 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1449 {
1450         struct qla_tgt *tgt = sess->tgt;
1451         struct qla_hw_data *ha = tgt->ha;
1452         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1453         struct se_session *se_sess;
1454         struct tcm_qla2xxx_lport *lport;
1455
1456         BUG_ON(in_interrupt());
1457
1458         se_sess = sess->se_sess;
1459         if (!se_sess) {
1460                 pr_err("struct fc_port->se_sess is NULL\n");
1461                 dump_stack();
1462                 return;
1463         }
1464
1465         lport = vha->vha_tgt.target_lport_ptr;
1466         if (!lport) {
1467                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1468                 dump_stack();
1469                 return;
1470         }
1471         target_wait_for_sess_cmds(se_sess);
1472
1473         transport_deregister_session_configfs(sess->se_sess);
1474         transport_deregister_session(sess->se_sess);
1475 }
1476
1477 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1478                                   struct se_session *se_sess, void *p)
1479 {
1480         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1481                                 struct tcm_qla2xxx_tpg, se_tpg);
1482         struct tcm_qla2xxx_lport *lport = tpg->lport;
1483         struct qla_hw_data *ha = lport->qla_vha->hw;
1484         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1485         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1486                                 struct tcm_qla2xxx_nacl, se_node_acl);
1487         struct fc_port *qlat_sess = p;
1488         uint16_t loop_id = qlat_sess->loop_id;
1489         unsigned long flags;
1490         unsigned char be_sid[3];
1491
1492         be_sid[0] = qlat_sess->d_id.b.domain;
1493         be_sid[1] = qlat_sess->d_id.b.area;
1494         be_sid[2] = qlat_sess->d_id.b.al_pa;
1495
1496         /*
1497          * And now setup se_nacl and session pointers into HW lport internal
1498          * mappings for fabric S_ID and LOOP_ID.
1499          */
1500         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1501         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1502                                      se_sess, qlat_sess, be_sid);
1503         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1504                                         se_sess, qlat_sess, loop_id);
1505         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1506
1507         return 0;
1508 }
1509
1510 /*
1511  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1512  * to locate struct se_node_acl
1513  */
1514 static int tcm_qla2xxx_check_initiator_node_acl(
1515         scsi_qla_host_t *vha,
1516         unsigned char *fc_wwpn,
1517         struct fc_port *qlat_sess)
1518 {
1519         struct qla_hw_data *ha = vha->hw;
1520         struct tcm_qla2xxx_lport *lport;
1521         struct tcm_qla2xxx_tpg *tpg;
1522         struct se_session *se_sess;
1523         unsigned char port_name[36];
1524         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1525                        TCM_QLA2XXX_DEFAULT_TAGS;
1526
1527         lport = vha->vha_tgt.target_lport_ptr;
1528         if (!lport) {
1529                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1530                 dump_stack();
1531                 return -EINVAL;
1532         }
1533         /*
1534          * Locate the TPG=1 reference..
1535          */
1536         tpg = lport->tpg_1;
1537         if (!tpg) {
1538                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1539                 return -EINVAL;
1540         }
1541         /*
1542          * Format the FCP Initiator port_name into colon seperated values to
1543          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1544          */
1545         memset(&port_name, 0, 36);
1546         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1547         /*
1548          * Locate our struct se_node_acl either from an explict NodeACL created
1549          * via ConfigFS, or via running in TPG demo mode.
1550          */
1551         se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1552                                        sizeof(struct qla_tgt_cmd),
1553                                        TARGET_PROT_ALL, port_name,
1554                                        qlat_sess, tcm_qla2xxx_session_cb);
1555         if (IS_ERR(se_sess))
1556                 return PTR_ERR(se_sess);
1557
1558         return 0;
1559 }
1560
1561 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1562                                     uint16_t loop_id, bool conf_compl_supported)
1563 {
1564         struct qla_tgt *tgt = sess->tgt;
1565         struct qla_hw_data *ha = tgt->ha;
1566         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1567         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1568         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1569         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1570                         struct tcm_qla2xxx_nacl, se_node_acl);
1571         u32 key;
1572
1573
1574         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1575                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1576                     sess, sess->port_name,
1577                     sess->loop_id, loop_id, sess->d_id.b.domain,
1578                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1579                     s_id.b.area, s_id.b.al_pa);
1580
1581         if (sess->loop_id != loop_id) {
1582                 /*
1583                  * Because we can shuffle loop IDs around and we
1584                  * update different sessions non-atomically, we might
1585                  * have overwritten this session's old loop ID
1586                  * already, and we might end up overwriting some other
1587                  * session that will be updated later.  So we have to
1588                  * be extra careful and we can't warn about those things...
1589                  */
1590                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1591                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1592
1593                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1594
1595                 sess->loop_id = loop_id;
1596         }
1597
1598         if (sess->d_id.b24 != s_id.b24) {
1599                 key = (((u32) sess->d_id.b.domain << 16) |
1600                        ((u32) sess->d_id.b.area   <<  8) |
1601                        ((u32) sess->d_id.b.al_pa));
1602
1603                 if (btree_lookup32(&lport->lport_fcport_map, key))
1604                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1605                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1606                             sess->d_id.b.domain, sess->d_id.b.area,
1607                             sess->d_id.b.al_pa);
1608                 else
1609                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1610                              sess->d_id.b.domain, sess->d_id.b.area,
1611                              sess->d_id.b.al_pa);
1612
1613                 key = (((u32) s_id.b.domain << 16) |
1614                        ((u32) s_id.b.area   <<  8) |
1615                        ((u32) s_id.b.al_pa));
1616
1617                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1618                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1619                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1620                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1621                 } else {
1622                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1623                             GFP_ATOMIC);
1624                 }
1625
1626                 sess->d_id = s_id;
1627                 nacl->nport_id = key;
1628         }
1629
1630         sess->conf_compl_supported = conf_compl_supported;
1631
1632         /* Reset logout parameters to default */
1633         sess->logout_on_delete = 1;
1634         sess->keep_nport_handle = 0;
1635 }
1636
1637 /*
1638  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1639  */
1640 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1641         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1642         .handle_data            = tcm_qla2xxx_handle_data,
1643         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1644         .free_cmd               = tcm_qla2xxx_free_cmd,
1645         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1646         .free_session           = tcm_qla2xxx_free_session,
1647         .update_sess            = tcm_qla2xxx_update_sess,
1648         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1649         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1650         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1651         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1652         .put_sess               = tcm_qla2xxx_put_sess,
1653         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1654         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1655         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1656 };
1657
1658 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1659 {
1660         int rc;
1661
1662         rc = btree_init32(&lport->lport_fcport_map);
1663         if (rc) {
1664                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1665                 return rc;
1666         }
1667
1668         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1669                                 65536);
1670         if (!lport->lport_loopid_map) {
1671                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1672                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1673                 btree_destroy32(&lport->lport_fcport_map);
1674                 return -ENOMEM;
1675         }
1676         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1677                * 65536);
1678         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1679                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1680         return 0;
1681 }
1682
1683 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1684                                          void *target_lport_ptr,
1685                                          u64 npiv_wwpn, u64 npiv_wwnn)
1686 {
1687         struct qla_hw_data *ha = vha->hw;
1688         struct tcm_qla2xxx_lport *lport =
1689                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1690         /*
1691          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1692          */
1693         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1694         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1695         lport->qla_vha = vha;
1696
1697         return 0;
1698 }
1699
1700 static struct se_wwn *tcm_qla2xxx_make_lport(
1701         struct target_fabric_configfs *tf,
1702         struct config_group *group,
1703         const char *name)
1704 {
1705         struct tcm_qla2xxx_lport *lport;
1706         u64 wwpn;
1707         int ret = -ENODEV;
1708
1709         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1710                 return ERR_PTR(-EINVAL);
1711
1712         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1713         if (!lport) {
1714                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1715                 return ERR_PTR(-ENOMEM);
1716         }
1717         lport->lport_wwpn = wwpn;
1718         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1719                                 wwpn);
1720         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1721
1722         ret = tcm_qla2xxx_init_lport(lport);
1723         if (ret != 0)
1724                 goto out;
1725
1726         ret = qlt_lport_register(lport, wwpn, 0, 0,
1727                                  tcm_qla2xxx_lport_register_cb);
1728         if (ret != 0)
1729                 goto out_lport;
1730
1731         return &lport->lport_wwn;
1732 out_lport:
1733         vfree(lport->lport_loopid_map);
1734         btree_destroy32(&lport->lport_fcport_map);
1735 out:
1736         kfree(lport);
1737         return ERR_PTR(ret);
1738 }
1739
1740 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1741 {
1742         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1743                         struct tcm_qla2xxx_lport, lport_wwn);
1744         struct scsi_qla_host *vha = lport->qla_vha;
1745         struct se_node_acl *node;
1746         u32 key = 0;
1747
1748         /*
1749          * Call into qla2x_target.c LLD logic to complete the
1750          * shutdown of struct qla_tgt after the call to
1751          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1752          */
1753         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1754                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1755
1756         qlt_lport_deregister(vha);
1757
1758         vfree(lport->lport_loopid_map);
1759         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1760                 btree_remove32(&lport->lport_fcport_map, key);
1761         btree_destroy32(&lport->lport_fcport_map);
1762         kfree(lport);
1763 }
1764
1765 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1766                                               void *target_lport_ptr,
1767                                               u64 npiv_wwpn, u64 npiv_wwnn)
1768 {
1769         struct fc_vport *vport;
1770         struct Scsi_Host *sh = base_vha->host;
1771         struct scsi_qla_host *npiv_vha;
1772         struct tcm_qla2xxx_lport *lport =
1773                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1774         struct tcm_qla2xxx_lport *base_lport =
1775                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1776         struct fc_vport_identifiers vport_id;
1777
1778         if (qla_ini_mode_enabled(base_vha)) {
1779                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1780                 return -EPERM;
1781         }
1782
1783         if (!base_lport || !base_lport->tpg_1 ||
1784             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1785                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1786                 return -EPERM;
1787         }
1788
1789         memset(&vport_id, 0, sizeof(vport_id));
1790         vport_id.port_name = npiv_wwpn;
1791         vport_id.node_name = npiv_wwnn;
1792         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1793         vport_id.vport_type = FC_PORTTYPE_NPIV;
1794         vport_id.disable = false;
1795
1796         vport = fc_vport_create(sh, 0, &vport_id);
1797         if (!vport) {
1798                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1799                 return -ENODEV;
1800         }
1801         /*
1802          * Setup local pointer to NPIV vhba + target_lport_ptr
1803          */
1804         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1805         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1806         lport->qla_vha = npiv_vha;
1807         scsi_host_get(npiv_vha->host);
1808         return 0;
1809 }
1810
1811
1812 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1813         struct target_fabric_configfs *tf,
1814         struct config_group *group,
1815         const char *name)
1816 {
1817         struct tcm_qla2xxx_lport *lport;
1818         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1819         char *p, tmp[128];
1820         int ret;
1821
1822         snprintf(tmp, 128, "%s", name);
1823
1824         p = strchr(tmp, '@');
1825         if (!p) {
1826                 pr_err("Unable to locate NPIV '@' separator\n");
1827                 return ERR_PTR(-EINVAL);
1828         }
1829         *p++ = '\0';
1830
1831         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1832                 return ERR_PTR(-EINVAL);
1833
1834         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1835                                        &npiv_wwpn, &npiv_wwnn) < 0)
1836                 return ERR_PTR(-EINVAL);
1837
1838         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1839         if (!lport) {
1840                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1841                 return ERR_PTR(-ENOMEM);
1842         }
1843         lport->lport_npiv_wwpn = npiv_wwpn;
1844         lport->lport_npiv_wwnn = npiv_wwnn;
1845         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1846
1847         ret = tcm_qla2xxx_init_lport(lport);
1848         if (ret != 0)
1849                 goto out;
1850
1851         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1852                                  tcm_qla2xxx_lport_register_npiv_cb);
1853         if (ret != 0)
1854                 goto out_lport;
1855
1856         return &lport->lport_wwn;
1857 out_lport:
1858         vfree(lport->lport_loopid_map);
1859         btree_destroy32(&lport->lport_fcport_map);
1860 out:
1861         kfree(lport);
1862         return ERR_PTR(ret);
1863 }
1864
1865 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1866 {
1867         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1868                         struct tcm_qla2xxx_lport, lport_wwn);
1869         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1870         struct qla_hw_data *ha = npiv_vha->hw;
1871         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1872
1873         scsi_host_put(npiv_vha->host);
1874         /*
1875          * Notify libfc that we want to release the vha->fc_vport
1876          */
1877         fc_vport_terminate(npiv_vha->fc_vport);
1878         scsi_host_put(base_vha->host);
1879         kfree(lport);
1880 }
1881
1882
1883 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1884                 char *page)
1885 {
1886         return sprintf(page,
1887             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1888             QLA2XXX_VERSION, utsname()->sysname,
1889             utsname()->machine, utsname()->release);
1890 }
1891
1892 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1893
1894 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1895         &tcm_qla2xxx_wwn_attr_version,
1896         NULL,
1897 };
1898
1899 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1900         .module                         = THIS_MODULE,
1901         .name                           = "qla2xxx",
1902         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1903         /*
1904          * XXX: Limit assumes single page per scatter-gather-list entry.
1905          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1906          */
1907         .max_data_sg_nents              = 1200,
1908         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1909         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1910         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1911         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1912         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1913         .tpg_check_demo_mode_write_protect =
1914                                         tcm_qla2xxx_check_demo_write_protect,
1915         .tpg_check_prod_mode_write_protect =
1916                                         tcm_qla2xxx_check_prod_write_protect,
1917         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1918         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1919         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1920         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1921         .release_cmd                    = tcm_qla2xxx_release_cmd,
1922         .close_session                  = tcm_qla2xxx_close_session,
1923         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1924         .sess_get_initiator_sid         = NULL,
1925         .write_pending                  = tcm_qla2xxx_write_pending,
1926         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1927         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1928         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1929         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1930         .queue_status                   = tcm_qla2xxx_queue_status,
1931         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1932         .aborted_task                   = tcm_qla2xxx_aborted_task,
1933         /*
1934          * Setup function pointers for generic logic in
1935          * target_core_fabric_configfs.c
1936          */
1937         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1938         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1939         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1940         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1941         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1942
1943         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1944         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1945         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1946 };
1947
1948 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1949         .module                         = THIS_MODULE,
1950         .name                           = "qla2xxx_npiv",
1951         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1952         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1953         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1954         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1955         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1956         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1957         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1958         .tpg_check_prod_mode_write_protect =
1959             tcm_qla2xxx_check_prod_write_protect,
1960         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1961         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1962         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1963         .release_cmd                    = tcm_qla2xxx_release_cmd,
1964         .close_session                  = tcm_qla2xxx_close_session,
1965         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1966         .sess_get_initiator_sid         = NULL,
1967         .write_pending                  = tcm_qla2xxx_write_pending,
1968         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1969         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1970         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1971         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1972         .queue_status                   = tcm_qla2xxx_queue_status,
1973         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1974         .aborted_task                   = tcm_qla2xxx_aborted_task,
1975         /*
1976          * Setup function pointers for generic logic in
1977          * target_core_fabric_configfs.c
1978          */
1979         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1980         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1981         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1982         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1983         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1984
1985         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1986         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1987 };
1988
1989 static int tcm_qla2xxx_register_configfs(void)
1990 {
1991         int ret;
1992
1993         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1994             QLA2XXX_VERSION, utsname()->sysname,
1995             utsname()->machine, utsname()->release);
1996
1997         ret = target_register_template(&tcm_qla2xxx_ops);
1998         if (ret)
1999                 return ret;
2000
2001         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
2002         if (ret)
2003                 goto out_fabric;
2004
2005         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
2006                                                 WQ_MEM_RECLAIM, 0);
2007         if (!tcm_qla2xxx_free_wq) {
2008                 ret = -ENOMEM;
2009                 goto out_fabric_npiv;
2010         }
2011
2012         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
2013         if (!tcm_qla2xxx_cmd_wq) {
2014                 ret = -ENOMEM;
2015                 goto out_free_wq;
2016         }
2017
2018         return 0;
2019
2020 out_free_wq:
2021         destroy_workqueue(tcm_qla2xxx_free_wq);
2022 out_fabric_npiv:
2023         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2024 out_fabric:
2025         target_unregister_template(&tcm_qla2xxx_ops);
2026         return ret;
2027 }
2028
2029 static void tcm_qla2xxx_deregister_configfs(void)
2030 {
2031         destroy_workqueue(tcm_qla2xxx_cmd_wq);
2032         destroy_workqueue(tcm_qla2xxx_free_wq);
2033
2034         target_unregister_template(&tcm_qla2xxx_ops);
2035         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2036 }
2037
2038 static int __init tcm_qla2xxx_init(void)
2039 {
2040         int ret;
2041
2042         ret = tcm_qla2xxx_register_configfs();
2043         if (ret < 0)
2044                 return ret;
2045
2046         return 0;
2047 }
2048
2049 static void __exit tcm_qla2xxx_exit(void)
2050 {
2051         tcm_qla2xxx_deregister_configfs();
2052 }
2053
2054 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2055 MODULE_LICENSE("GPL");
2056 module_init(tcm_qla2xxx_init);
2057 module_exit(tcm_qla2xxx_exit);