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