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
  52 /*
  53  * Parse WWN.
  54  * If strict, we require lower-case hex and colon separators to be sure
  55  * the name is the same as what would be generated by ft_format_wwn()
  56  * so the name and wwn are mapped one-to-one.
  57  */
  58 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  59 {
  60         const char *cp;
  61         char c;
  62         u32 nibble;
  63         u32 byte = 0;
  64         u32 pos = 0;
  65         u32 err;
  66
  67         *wwn = 0;
  68         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  69                 c = *cp;
  70                 if (c == '\n' && cp[1] == '\0')
  71                         continue;
  72                 if (strict && pos++ == 2 && byte++ < 7) {
  73                         pos = 0;
  74                         if (c == ':')
  75                                 continue;
  76                         err = 1;
  77                         goto fail;
  78                 }
  79                 if (c == '\0') {
  80                         err = 2;
  81                         if (strict && byte != 8)
  82                                 goto fail;
  83                         return cp - name;
  84                 }
  85                 err = 3;
  86                 if (isdigit(c))
  87                         nibble = c - '0';
  88                 else if (isxdigit(c) && (islower(c) || !strict))
  89                         nibble = tolower(c) - 'a' + 10;
  90                 else
  91                         goto fail;
  92                 *wwn = (*wwn << 4) | nibble;
  93         }
  94         err = 4;
  95 fail:
  96         pr_debug("err %u len %zu pos %u byte %u\n",
  97                         err, cp - name, pos, byte);
  98         return -1;
  99 }
 100
 101 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 102 {
 103         u8 b[8];
 104
 105         put_unaligned_be64(wwn, b);
 106         return snprintf(buf, len,
 107                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 108                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 109 }
 110
 111 static char *tcm_qla2xxx_get_fabric_name(void)
 112 {
 113         return "qla2xxx";
 114 }
 115
 116 /*
 117  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 118  */
 119 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 120 {
 121         unsigned int i, j;
 122         u8 wwn[8];
 123
 124         memset(wwn, 0, sizeof(wwn));
 125
 126         /* Validate and store the new name */
 127         for (i = 0, j = 0; i < 16; i++) {
 128                 int value;
 129
 130                 value = hex_to_bin(*ns++);
 131                 if (value >= 0)
 132                         j = (j << 4) | value;
 133                 else
 134                         return -EINVAL;
 135
 136                 if (i % 2) {
 137                         wwn[i/2] = j & 0xff;
 138                         j = 0;
 139                 }
 140         }
 141
 142         *nm = wwn_to_u64(wwn);
 143         return 0;
 144 }
 145
 146 /*
 147  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 148  * store_fc_host_vport_create()
 149  */
 150 static int tcm_qla2xxx_npiv_parse_wwn(
 151         const char *name,
 152         size_t count,
 153         u64 *wwpn,
 154         u64 *wwnn)
 155 {
 156         unsigned int cnt = count;
 157         int rc;
 158
 159         *wwpn = 0;
 160         *wwnn = 0;
 161
 162         /* count may include a LF at end of string */
 163         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 164                 cnt--;
 165
 166         /* validate we have enough characters for WWPN */
 167         if ((cnt != (16+1+16)) || (name[16] != ':'))
 168                 return -EINVAL;
 169
 170         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 171         if (rc != 0)
 172                 return rc;
 173
 174         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 175         if (rc != 0)
 176                 return rc;
 177
 178         return 0;
 179 }
 180
 181 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 182 {
 183         return "qla2xxx_npiv";
 184 }
 185
 186 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 187 {
 188         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 189                                 struct tcm_qla2xxx_tpg, se_tpg);
 190         struct tcm_qla2xxx_lport *lport = tpg->lport;
 191
 192         return lport->lport_naa_name;
 193 }
 194
 195 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 196 {
 197         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 198                                 struct tcm_qla2xxx_tpg, se_tpg);
 199         return tpg->lport_tpgt;
 200 }
 201
 202 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 203 {
 204         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 205                                 struct tcm_qla2xxx_tpg, se_tpg);
 206
 207         return tpg->tpg_attrib.generate_node_acls;
 208 }
 209
 210 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 211 {
 212         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 213                                 struct tcm_qla2xxx_tpg, se_tpg);
 214
 215         return tpg->tpg_attrib.cache_dynamic_acls;
 216 }
 217
 218 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 219 {
 220         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 221                                 struct tcm_qla2xxx_tpg, se_tpg);
 222
 223         return tpg->tpg_attrib.demo_mode_write_protect;
 224 }
 225
 226 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 227 {
 228         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 229                                 struct tcm_qla2xxx_tpg, se_tpg);
 230
 231         return tpg->tpg_attrib.prod_mode_write_protect;
 232 }
 233
 234 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 235 {
 236         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 237                                 struct tcm_qla2xxx_tpg, se_tpg);
 238
 239         return tpg->tpg_attrib.demo_mode_login_only;
 240 }
 241
 242 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 243 {
 244         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 245                                 struct tcm_qla2xxx_tpg, se_tpg);
 246
 247         return tpg->tpg_attrib.fabric_prot_type;
 248 }
 249
 250 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 251 {
 252         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 253                                 struct tcm_qla2xxx_tpg, se_tpg);
 254
 255         return tpg->lport_tpgt;
 256 }
 257
 258 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 259 {
 260         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 261                         struct qla_tgt_mgmt_cmd, free_work);
 262
 263         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 264 }
 265
 266 /*
 267  * Called from qla_target_template->free_mcmd(), and will call
 268  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 269  * release callback.  qla_hw_data->hardware_lock is expected to be held
 270  */
 271 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 272 {
 273         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 274         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 275 }
 276
 277 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 278 {
 279         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 280
 281         cmd->cmd_in_wq = 0;
 282
 283         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 284
 285         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 286         cmd->trc_flags |= TRC_CMD_FREE;
 287         transport_generic_free_cmd(&cmd->se_cmd, 0);
 288 }
 289
 290 /*
 291  * Called from qla_target_template->free_cmd(), and will call
 292  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 293  * release callback.  qla_hw_data->hardware_lock is expected to be held
 294  */
 295 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 296 {
 297         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 298         cmd->cmd_in_wq = 1;
 299
 300         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 301         cmd->trc_flags |= TRC_CMD_DONE;
 302
 303         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 304         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 305 }
 306
 307 /*
 308  * Called from struct target_core_fabric_ops->check_stop_free() context
 309  */
 310 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 311 {
 312         struct qla_tgt_cmd *cmd;
 313
 314         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 315                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 316                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 317         }
 318
 319         return target_put_sess_cmd(se_cmd);
 320 }
 321
 322 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 323  * fabric descriptor @se_cmd command to release
 324  */
 325 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 326 {
 327         struct qla_tgt_cmd *cmd;
 328
 329         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 330                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 331                                 struct qla_tgt_mgmt_cmd, se_cmd);
 332                 qlt_free_mcmd(mcmd);
 333                 return;
 334         }
 335
 336         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 337         qlt_free_cmd(cmd);
 338 }
 339
 340 static void tcm_qla2xxx_release_session(struct kref *kref)
 341 {
 342         struct fc_port  *sess = container_of(kref,
 343             struct fc_port, sess_kref);
 344
 345         qlt_unreg_sess(sess);
 346 }
 347
 348 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 349 {
 350         if (!sess)
 351                 return;
 352
 353         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 354         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 355 }
 356
 357 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 358 {
 359         struct fc_port *sess = se_sess->fabric_sess_ptr;
 360         struct scsi_qla_host *vha;
 361         unsigned long flags;
 362
 363         BUG_ON(!sess);
 364         vha = sess->vha;
 365
 366         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 367         target_sess_cmd_list_set_waiting(se_sess);
 368         tcm_qla2xxx_put_sess(sess);
 369         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 370 }
 371
 372 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 373 {
 374         return 0;
 375 }
 376
 377 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 378 {
 379         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 380                                 struct qla_tgt_cmd, se_cmd);
 381
 382         if (cmd->aborted) {
 383                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 384                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 385                  * already kick start the free.
 386                  */
 387                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 388                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 389                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 390                         cmd->se_cmd.transport_state,
 391                         cmd->se_cmd.t_state,
 392                         cmd->se_cmd.se_cmd_flags);
 393                 return 0;
 394         }
 395         cmd->trc_flags |= TRC_XFR_RDY;
 396         cmd->bufflen = se_cmd->data_length;
 397         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 398
 399         cmd->sg_cnt = se_cmd->t_data_nents;
 400         cmd->sg = se_cmd->t_data_sg;
 401
 402         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 403         cmd->prot_sg = se_cmd->t_prot_sg;
 404         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 405         se_cmd->pi_err = 0;
 406
 407         /*
 408          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 409          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 410          */
 411         return qlt_rdy_to_xfer(cmd);
 412 }
 413
 414 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 415 {
 416         unsigned long flags;
 417         /*
 418          * Check for WRITE_PENDING status to determine if we need to wait for
 419          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 420          */
 421         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 422         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 423             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 424                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 425                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 426                                                 50);
 427                 return 0;
 428         }
 429         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 430
 431         return 0;
 432 }
 433
 434 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 435 {
 436         return;
 437 }
 438
 439 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 440 {
 441         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 442                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 443                                 struct qla_tgt_cmd, se_cmd);
 444                 return cmd->state;
 445         }
 446
 447         return 0;
 448 }
 449
 450 /*
 451  * Called from process context in qla_target.c:qlt_do_work() code
 452  */
 453 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 454         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 455         int data_dir, int bidi)
 456 {
 457         struct se_cmd *se_cmd = &cmd->se_cmd;
 458         struct se_session *se_sess;
 459         struct fc_port *sess;
 460 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 461         struct se_portal_group *se_tpg;
 462         struct tcm_qla2xxx_tpg *tpg;
 463 #endif
 464         int flags = TARGET_SCF_ACK_KREF;
 465
 466         if (bidi)
 467                 flags |= TARGET_SCF_BIDI_OP;
 468
 469         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 470                 flags |= TARGET_SCF_USE_CPUID;
 471
 472         sess = cmd->sess;
 473         if (!sess) {
 474                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 475                 return -EINVAL;
 476         }
 477
 478         se_sess = sess->se_sess;
 479         if (!se_sess) {
 480                 pr_err("Unable to locate active struct se_session\n");
 481                 return -EINVAL;
 482         }
 483
 484 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 485         se_tpg = se_sess->se_tpg;
 486         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 487         if (unlikely(tpg->tpg_attrib.jam_host)) {
 488                 /* return, and dont run target_submit_cmd,discarding command */
 489                 return 0;
 490         }
 491 #endif
 492
 493         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 494         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 495                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 496                                 data_dir, flags);
 497 }
 498
 499 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 500 {
 501         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 502
 503         /*
 504          * Ensure that the complete FCP WRITE payload has been received.
 505          * Otherwise return an exception via CHECK_CONDITION status.
 506          */
 507         cmd->cmd_in_wq = 0;
 508
 509         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 510         if (!cmd->write_data_transferred) {
 511                 /*
 512                  * Check if se_cmd has already been aborted via LUN_RESET, and
 513                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 514                  */
 515                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 516                         complete(&cmd->se_cmd.t_transport_stop_comp);
 517                         return;
 518                 }
 519
 520                 switch (cmd->dif_err_code) {
 521                 case DIF_ERR_GRD:
 522                         cmd->se_cmd.pi_err =
 523                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 524                         break;
 525                 case DIF_ERR_REF:
 526                         cmd->se_cmd.pi_err =
 527                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 528                         break;
 529                 case DIF_ERR_APP:
 530                         cmd->se_cmd.pi_err =
 531                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 532                         break;
 533                 case DIF_ERR_NONE:
 534                 default:
 535                         break;
 536                 }
 537
 538                 if (cmd->se_cmd.pi_err)
 539                         transport_generic_request_failure(&cmd->se_cmd,
 540                                 cmd->se_cmd.pi_err);
 541                 else
 542                         transport_generic_request_failure(&cmd->se_cmd,
 543                                 TCM_CHECK_CONDITION_ABORT_CMD);
 544
 545                 return;
 546         }
 547
 548         return target_execute_cmd(&cmd->se_cmd);
 549 }
 550
 551 /*
 552  * Called from qla_target.c:qlt_do_ctio_completion()
 553  */
 554 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 555 {
 556         cmd->trc_flags |= TRC_DATA_IN;
 557         cmd->cmd_in_wq = 1;
 558         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 559         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 560 }
 561
 562 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 563 {
 564         return 0;
 565 }
 566
 567 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 568     uint16_t *pfw_prot_opts)
 569 {
 570         struct se_cmd *se_cmd = &cmd->se_cmd;
 571
 572         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 573                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 574
 575         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 576                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 577
 578         return 0;
 579 }
 580
 581 /*
 582  * Called from qla_target.c:qlt_issue_task_mgmt()
 583  */
 584 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 585         uint16_t tmr_func, uint32_t tag)
 586 {
 587         struct fc_port *sess = mcmd->sess;
 588         struct se_cmd *se_cmd = &mcmd->se_cmd;
 589         int transl_tmr_func = 0;
 590         int flags = TARGET_SCF_ACK_KREF;
 591
 592         switch (tmr_func) {
 593         case QLA_TGT_ABTS:
 594                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 595                 transl_tmr_func = TMR_ABORT_TASK;
 596                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 597                 break;
 598         case QLA_TGT_2G_ABORT_TASK:
 599                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 600                 transl_tmr_func = TMR_ABORT_TASK;
 601                 break;
 602         case QLA_TGT_CLEAR_ACA:
 603                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 604                 transl_tmr_func = TMR_CLEAR_ACA;
 605                 break;
 606         case QLA_TGT_TARGET_RESET:
 607                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 608                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 609                 break;
 610         case QLA_TGT_LUN_RESET:
 611                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 612                 transl_tmr_func = TMR_LUN_RESET;
 613                 break;
 614         case QLA_TGT_CLEAR_TS:
 615                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 616                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 617                 break;
 618         case QLA_TGT_ABORT_TS:
 619                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 620                 transl_tmr_func = TMR_ABORT_TASK_SET;
 621                 break;
 622         default:
 623                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 624                     sess->vha->host_no, tmr_func);
 625                 return -ENOSYS;
 626         }
 627
 628         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 629             transl_tmr_func, GFP_ATOMIC, tag, flags);
 630 }
 631
 632 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 633     uint64_t tag)
 634 {
 635         struct qla_tgt_cmd *cmd = NULL;
 636         struct se_cmd *secmd;
 637         unsigned long flags;
 638
 639         if (!sess->se_sess)
 640                 return NULL;
 641
 642         spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags);
 643         list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) {
 644                 /* skip task management functions, including tmr->task_cmd */
 645                 if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 646                         continue;
 647
 648                 if (secmd->tag == tag) {
 649                         cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd);
 650                         break;
 651                 }
 652         }
 653         spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags);
 654
 655         return cmd;
 656 }
 657
 658 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 659 {
 660         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 661                                 struct qla_tgt_cmd, se_cmd);
 662
 663         if (cmd->aborted) {
 664                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 665                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 666                  * already kick start the free.
 667                  */
 668                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 669                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 670                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 671                         cmd->se_cmd.transport_state,
 672                         cmd->se_cmd.t_state,
 673                         cmd->se_cmd.se_cmd_flags);
 674                 return 0;
 675         }
 676
 677         cmd->trc_flags |= TRC_XMIT_DATA;
 678         cmd->bufflen = se_cmd->data_length;
 679         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 680
 681         cmd->sg_cnt = se_cmd->t_data_nents;
 682         cmd->sg = se_cmd->t_data_sg;
 683         cmd->offset = 0;
 684
 685         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 686         cmd->prot_sg = se_cmd->t_prot_sg;
 687         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 688         se_cmd->pi_err = 0;
 689
 690         /*
 691          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 692          */
 693         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 694                                 se_cmd->scsi_status);
 695 }
 696
 697 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 698 {
 699         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 700                                 struct qla_tgt_cmd, se_cmd);
 701         int xmit_type = QLA_TGT_XMIT_STATUS;
 702
 703         if (cmd->aborted) {
 704                 /*
 705                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 706                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 707                  * already kick start the free.
 708                  */
 709                 pr_debug(
 710                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 711                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 712                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 713                     cmd->se_cmd.se_cmd_flags);
 714                 return 0;
 715         }
 716         cmd->bufflen = se_cmd->data_length;
 717         cmd->sg = NULL;
 718         cmd->sg_cnt = 0;
 719         cmd->offset = 0;
 720         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 721         if (cmd->trc_flags & TRC_XMIT_STATUS) {
 722                 pr_crit("Multiple calls for status = %p.\n", cmd);
 723                 dump_stack();
 724         }
 725         cmd->trc_flags |= TRC_XMIT_STATUS;
 726
 727         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 728                 /*
 729                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 730                  * for qla_tgt_xmit_response LLD code
 731                  */
 732                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 733                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 734                         se_cmd->residual_count = 0;
 735                 }
 736                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 737                 se_cmd->residual_count += se_cmd->data_length;
 738
 739                 cmd->bufflen = 0;
 740         }
 741         /*
 742          * Now queue status response to qla2xxx LLD code and response ring
 743          */
 744         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 745 }
 746
 747 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 748 {
 749         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 750         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 751                                 struct qla_tgt_mgmt_cmd, se_cmd);
 752
 753         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 754                         mcmd, se_tmr->function, se_tmr->response);
 755         /*
 756          * Do translation between TCM TM response codes and
 757          * QLA2xxx FC TM response codes.
 758          */
 759         switch (se_tmr->response) {
 760         case TMR_FUNCTION_COMPLETE:
 761                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 762                 break;
 763         case TMR_TASK_DOES_NOT_EXIST:
 764                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 765                 break;
 766         case TMR_FUNCTION_REJECTED:
 767                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 768                 break;
 769         case TMR_LUN_DOES_NOT_EXIST:
 770         default:
 771                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 772                 break;
 773         }
 774         /*
 775          * Queue the TM response to QLA2xxx LLD to build a
 776          * CTIO response packet.
 777          */
 778         qlt_xmit_tm_rsp(mcmd);
 779 }
 780
 781 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 782 {
 783         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 784                                 struct qla_tgt_cmd, se_cmd);
 785
 786         if (qlt_abort_cmd(cmd))
 787                 return;
 788 }
 789
 790 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 791                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 792 /*
 793  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 794  */
 795 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 796 {
 797         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 798         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 799         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 800         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 801                                 struct tcm_qla2xxx_lport, lport_wwn);
 802         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 803                                 struct tcm_qla2xxx_nacl, se_node_acl);
 804         void *node;
 805
 806         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 807
 808         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 809         if (WARN_ON(node && (node != se_nacl))) {
 810                 /*
 811                  * The nacl no longer matches what we think it should be.
 812                  * Most likely a new dynamic acl has been added while
 813                  * someone dropped the hardware lock.  It clearly is a
 814                  * bug elsewhere, but this bit can't make things worse.
 815                  */
 816                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 817                                node, GFP_ATOMIC);
 818         }
 819
 820         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 821             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 822         /*
 823          * Now clear the se_nacl and session pointers from our HW lport lookup
 824          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 825          *
 826          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 827          * target_wait_for_sess_cmds() before the session waits for outstanding
 828          * I/O to complete, to avoid a race between session shutdown execution
 829          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 830          */
 831         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 832 }
 833
 834 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 835 {
 836         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 837         target_sess_cmd_list_set_waiting(sess->se_sess);
 838 }
 839
 840 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 841                 const char *name)
 842 {
 843         struct tcm_qla2xxx_nacl *nacl =
 844                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 845         u64 wwnn;
 846
 847         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 848                 return -EINVAL;
 849
 850         nacl->nport_wwnn = wwnn;
 851         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 852
 853         return 0;
 854 }
 855
 856 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 857
 858 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 859                                                                         \
 860 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 861                 struct config_item *item, char *page)                   \
 862 {                                                                       \
 863         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 864         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 865                         struct tcm_qla2xxx_tpg, se_tpg);                \
 866                                                                         \
 867         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 868 }                                                                       \
 869                                                                         \
 870 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 871                 struct config_item *item, const char *page, size_t count) \
 872 {                                                                       \
 873         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 874         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 875                         struct tcm_qla2xxx_tpg, se_tpg);                \
 876         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 877         unsigned long val;                                              \
 878         int ret;                                                        \
 879                                                                         \
 880         ret = kstrtoul(page, 0, &val);                                  \
 881         if (ret < 0) {                                                  \
 882                 pr_err("kstrtoul() failed with"                         \
 883                                 " ret: %d\n", ret);                     \
 884                 return -EINVAL;                                         \
 885         }                                                               \
 886                                                                         \
 887         if ((val != 0) && (val != 1)) {                                 \
 888                 pr_err("Illegal boolean value %lu\n", val);             \
 889                 return -EINVAL;                                         \
 890         }                                                               \
 891                                                                         \
 892         a->name = val;                                                  \
 893                                                                         \
 894         return count;                                                   \
 895 }                                                                       \
 896 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 897
 898 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 899 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 900 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 901 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 902 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 903 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 904 DEF_QLA_TPG_ATTRIB(jam_host);
 905 #endif
 906
 907 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 908         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 909         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 910         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 911         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 912         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 913 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 914         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 915 #endif
 916         NULL,
 917 };
 918
 919 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 920
 921 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 922                 char *page)
 923 {
 924         struct se_portal_group *se_tpg = to_tpg(item);
 925         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 926                         struct tcm_qla2xxx_tpg, se_tpg);
 927
 928         return snprintf(page, PAGE_SIZE, "%d\n",
 929                         atomic_read(&tpg->lport_tpg_enabled));
 930 }
 931
 932 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 933 {
 934         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 935                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 936         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 937         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 938
 939         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 940                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 941                 qlt_enable_vha(base_vha);
 942         }
 943         complete(&base_tpg->tpg_base_comp);
 944 }
 945
 946 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 947 {
 948         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 949                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 950         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 951         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 952
 953         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 954                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 955                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 956         }
 957         complete(&base_tpg->tpg_base_comp);
 958 }
 959
 960 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 961                 const char *page, size_t count)
 962 {
 963         struct se_portal_group *se_tpg = to_tpg(item);
 964         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 965                         struct tcm_qla2xxx_tpg, se_tpg);
 966         unsigned long op;
 967         int rc;
 968
 969         rc = kstrtoul(page, 0, &op);
 970         if (rc < 0) {
 971                 pr_err("kstrtoul() returned %d\n", rc);
 972                 return -EINVAL;
 973         }
 974         if ((op != 1) && (op != 0)) {
 975                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 976                 return -EINVAL;
 977         }
 978         if (op) {
 979                 if (atomic_read(&tpg->lport_tpg_enabled))
 980                         return -EEXIST;
 981
 982                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 983         } else {
 984                 if (!atomic_read(&tpg->lport_tpg_enabled))
 985                         return count;
 986
 987                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 988         }
 989         init_completion(&tpg->tpg_base_comp);
 990         schedule_work(&tpg->tpg_base_work);
 991         wait_for_completion(&tpg->tpg_base_comp);
 992
 993         if (op) {
 994                 if (!atomic_read(&tpg->lport_tpg_enabled))
 995                         return -ENODEV;
 996         } else {
 997                 if (atomic_read(&tpg->lport_tpg_enabled))
 998                         return -EPERM;
 999         }
1000         return count;
1001 }
1002
1003 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
1004                 char *page)
1005 {
1006         return target_show_dynamic_sessions(to_tpg(item), page);
1007 }
1008
1009 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
1010                 const char *page, size_t count)
1011 {
1012         struct se_portal_group *se_tpg = to_tpg(item);
1013         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1014                                 struct tcm_qla2xxx_tpg, se_tpg);
1015         unsigned long val;
1016         int ret = kstrtoul(page, 0, &val);
1017
1018         if (ret) {
1019                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
1020                 return ret;
1021         }
1022         if (val != 0 && val != 1 && val != 3) {
1023                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
1024                 return -EINVAL;
1025         }
1026         tpg->tpg_attrib.fabric_prot_type = val;
1027
1028         return count;
1029 }
1030
1031 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1032                 char *page)
1033 {
1034         struct se_portal_group *se_tpg = to_tpg(item);
1035         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1036                                 struct tcm_qla2xxx_tpg, se_tpg);
1037
1038         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1039 }
1040
1041 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1042 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1043 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1044
1045 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1046         &tcm_qla2xxx_tpg_attr_enable,
1047         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1048         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1049         NULL,
1050 };
1051
1052 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1053         struct se_wwn *wwn,
1054         struct config_group *group,
1055         const char *name)
1056 {
1057         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1058                         struct tcm_qla2xxx_lport, lport_wwn);
1059         struct tcm_qla2xxx_tpg *tpg;
1060         unsigned long tpgt;
1061         int ret;
1062
1063         if (strstr(name, "tpgt_") != name)
1064                 return ERR_PTR(-EINVAL);
1065         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1066                 return ERR_PTR(-EINVAL);
1067
1068         if ((tpgt != 1)) {
1069                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1070                 return ERR_PTR(-ENOSYS);
1071         }
1072
1073         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1074         if (!tpg) {
1075                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1076                 return ERR_PTR(-ENOMEM);
1077         }
1078         tpg->lport = lport;
1079         tpg->lport_tpgt = tpgt;
1080         /*
1081          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1082          * NodeACLs
1083          */
1084         tpg->tpg_attrib.generate_node_acls = 1;
1085         tpg->tpg_attrib.demo_mode_write_protect = 1;
1086         tpg->tpg_attrib.cache_dynamic_acls = 1;
1087         tpg->tpg_attrib.demo_mode_login_only = 1;
1088         tpg->tpg_attrib.jam_host = 0;
1089
1090         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1091         if (ret < 0) {
1092                 kfree(tpg);
1093                 return NULL;
1094         }
1095
1096         lport->tpg_1 = tpg;
1097
1098         return &tpg->se_tpg;
1099 }
1100
1101 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1102 {
1103         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1104                         struct tcm_qla2xxx_tpg, se_tpg);
1105         struct tcm_qla2xxx_lport *lport = tpg->lport;
1106         struct scsi_qla_host *vha = lport->qla_vha;
1107         /*
1108          * Call into qla2x_target.c LLD logic to shutdown the active
1109          * FC Nexuses and disable target mode operation for this qla_hw_data
1110          */
1111         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1112                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1113
1114         core_tpg_deregister(se_tpg);
1115         /*
1116          * Clear local TPG=1 pointer for non NPIV mode.
1117          */
1118         lport->tpg_1 = NULL;
1119         kfree(tpg);
1120 }
1121
1122 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1123                 char *page)
1124 {
1125         return tcm_qla2xxx_tpg_enable_show(item, page);
1126 }
1127
1128 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1129                 const char *page, size_t count)
1130 {
1131         struct se_portal_group *se_tpg = to_tpg(item);
1132         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1133         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1134                         struct tcm_qla2xxx_lport, lport_wwn);
1135         struct scsi_qla_host *vha = lport->qla_vha;
1136         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1137                         struct tcm_qla2xxx_tpg, se_tpg);
1138         unsigned long op;
1139         int rc;
1140
1141         rc = kstrtoul(page, 0, &op);
1142         if (rc < 0) {
1143                 pr_err("kstrtoul() returned %d\n", rc);
1144                 return -EINVAL;
1145         }
1146         if ((op != 1) && (op != 0)) {
1147                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1148                 return -EINVAL;
1149         }
1150         if (op) {
1151                 if (atomic_read(&tpg->lport_tpg_enabled))
1152                         return -EEXIST;
1153
1154                 atomic_set(&tpg->lport_tpg_enabled, 1);
1155                 qlt_enable_vha(vha);
1156         } else {
1157                 if (!atomic_read(&tpg->lport_tpg_enabled))
1158                         return count;
1159
1160                 atomic_set(&tpg->lport_tpg_enabled, 0);
1161                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1162         }
1163
1164         return count;
1165 }
1166
1167 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1168
1169 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1170         &tcm_qla2xxx_npiv_tpg_attr_enable,
1171         NULL,
1172 };
1173
1174 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1175         struct se_wwn *wwn,
1176         struct config_group *group,
1177         const char *name)
1178 {
1179         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1180                         struct tcm_qla2xxx_lport, lport_wwn);
1181         struct tcm_qla2xxx_tpg *tpg;
1182         unsigned long tpgt;
1183         int ret;
1184
1185         if (strstr(name, "tpgt_") != name)
1186                 return ERR_PTR(-EINVAL);
1187         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1188                 return ERR_PTR(-EINVAL);
1189
1190         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1191         if (!tpg) {
1192                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1193                 return ERR_PTR(-ENOMEM);
1194         }
1195         tpg->lport = lport;
1196         tpg->lport_tpgt = tpgt;
1197
1198         /*
1199          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1200          * NodeACLs
1201          */
1202         tpg->tpg_attrib.generate_node_acls = 1;
1203         tpg->tpg_attrib.demo_mode_write_protect = 1;
1204         tpg->tpg_attrib.cache_dynamic_acls = 1;
1205         tpg->tpg_attrib.demo_mode_login_only = 1;
1206
1207         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1208         if (ret < 0) {
1209                 kfree(tpg);
1210                 return NULL;
1211         }
1212         lport->tpg_1 = tpg;
1213         return &tpg->se_tpg;
1214 }
1215
1216 /*
1217  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1218  */
1219 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1220         scsi_qla_host_t *vha,
1221         const uint8_t *s_id)
1222 {
1223         struct tcm_qla2xxx_lport *lport;
1224         struct se_node_acl *se_nacl;
1225         struct tcm_qla2xxx_nacl *nacl;
1226         u32 key;
1227
1228         lport = vha->vha_tgt.target_lport_ptr;
1229         if (!lport) {
1230                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1231                 dump_stack();
1232                 return NULL;
1233         }
1234
1235         key = sid_to_key(s_id);
1236         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1237
1238         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1239         if (!se_nacl) {
1240                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1241                 return NULL;
1242         }
1243         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1244             se_nacl, se_nacl->initiatorname);
1245
1246         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1247         if (!nacl->fc_port) {
1248                 pr_err("Unable to locate struct fc_port\n");
1249                 return NULL;
1250         }
1251
1252         return nacl->fc_port;
1253 }
1254
1255 /*
1256  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1257  */
1258 static void tcm_qla2xxx_set_sess_by_s_id(
1259         struct tcm_qla2xxx_lport *lport,
1260         struct se_node_acl *new_se_nacl,
1261         struct tcm_qla2xxx_nacl *nacl,
1262         struct se_session *se_sess,
1263         struct fc_port *fc_port,
1264         uint8_t *s_id)
1265 {
1266         u32 key;
1267         void *slot;
1268         int rc;
1269
1270         key = sid_to_key(s_id);
1271         pr_debug("set_sess_by_s_id: %06x\n", key);
1272
1273         slot = btree_lookup32(&lport->lport_fcport_map, key);
1274         if (!slot) {
1275                 if (new_se_nacl) {
1276                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1277                         nacl->nport_id = key;
1278                         rc = btree_insert32(&lport->lport_fcport_map, key,
1279                                         new_se_nacl, GFP_ATOMIC);
1280                         if (rc)
1281                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1282                                     (int)key);
1283                 } else {
1284                         pr_debug("Wiping nonexisting fc_port entry\n");
1285                 }
1286
1287                 fc_port->se_sess = se_sess;
1288                 nacl->fc_port = fc_port;
1289                 return;
1290         }
1291
1292         if (nacl->fc_port) {
1293                 if (new_se_nacl == NULL) {
1294                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1295                         btree_remove32(&lport->lport_fcport_map, key);
1296                         nacl->fc_port = NULL;
1297                         return;
1298                 }
1299                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1300                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1301                 fc_port->se_sess = se_sess;
1302                 nacl->fc_port = fc_port;
1303                 return;
1304         }
1305
1306         if (new_se_nacl == NULL) {
1307                 pr_debug("Clearing existing fc_port entry\n");
1308                 btree_remove32(&lport->lport_fcport_map, key);
1309                 return;
1310         }
1311
1312         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1313         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1314         fc_port->se_sess = se_sess;
1315         nacl->fc_port = fc_port;
1316
1317         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1318             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1319 }
1320
1321 /*
1322  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1323  */
1324 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1325         scsi_qla_host_t *vha,
1326         const uint16_t loop_id)
1327 {
1328         struct tcm_qla2xxx_lport *lport;
1329         struct se_node_acl *se_nacl;
1330         struct tcm_qla2xxx_nacl *nacl;
1331         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1332
1333         lport = vha->vha_tgt.target_lport_ptr;
1334         if (!lport) {
1335                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1336                 dump_stack();
1337                 return NULL;
1338         }
1339
1340         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1341
1342         fc_loopid = lport->lport_loopid_map + loop_id;
1343         se_nacl = fc_loopid->se_nacl;
1344         if (!se_nacl) {
1345                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1346                     loop_id);
1347                 return NULL;
1348         }
1349
1350         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1351
1352         if (!nacl->fc_port) {
1353                 pr_err("Unable to locate struct fc_port\n");
1354                 return NULL;
1355         }
1356
1357         return nacl->fc_port;
1358 }
1359
1360 /*
1361  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1362  */
1363 static void tcm_qla2xxx_set_sess_by_loop_id(
1364         struct tcm_qla2xxx_lport *lport,
1365         struct se_node_acl *new_se_nacl,
1366         struct tcm_qla2xxx_nacl *nacl,
1367         struct se_session *se_sess,
1368         struct fc_port *fc_port,
1369         uint16_t loop_id)
1370 {
1371         struct se_node_acl *saved_nacl;
1372         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1373
1374         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1375
1376         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1377                         lport->lport_loopid_map)[loop_id];
1378
1379         saved_nacl = fc_loopid->se_nacl;
1380         if (!saved_nacl) {
1381                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1382                 fc_loopid->se_nacl = new_se_nacl;
1383                 if (fc_port->se_sess != se_sess)
1384                         fc_port->se_sess = se_sess;
1385                 if (nacl->fc_port != fc_port)
1386                         nacl->fc_port = fc_port;
1387                 return;
1388         }
1389
1390         if (nacl->fc_port) {
1391                 if (new_se_nacl == NULL) {
1392                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1393                         fc_loopid->se_nacl = NULL;
1394                         nacl->fc_port = NULL;
1395                         return;
1396                 }
1397
1398                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1399                 fc_loopid->se_nacl = new_se_nacl;
1400                 if (fc_port->se_sess != se_sess)
1401                         fc_port->se_sess = se_sess;
1402                 if (nacl->fc_port != fc_port)
1403                         nacl->fc_port = fc_port;
1404                 return;
1405         }
1406
1407         if (new_se_nacl == NULL) {
1408                 pr_debug("Clearing fc_loopid->se_nacl\n");
1409                 fc_loopid->se_nacl = NULL;
1410                 return;
1411         }
1412
1413         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1414         fc_loopid->se_nacl = new_se_nacl;
1415         if (fc_port->se_sess != se_sess)
1416                 fc_port->se_sess = se_sess;
1417         if (nacl->fc_port != fc_port)
1418                 nacl->fc_port = fc_port;
1419
1420         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1421             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1422 }
1423
1424 /*
1425  * Should always be called with qla_hw_data->tgt.sess_lock held.
1426  */
1427 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1428                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1429 {
1430         struct se_session *se_sess = sess->se_sess;
1431         unsigned char be_sid[3];
1432
1433         be_sid[0] = sess->d_id.b.domain;
1434         be_sid[1] = sess->d_id.b.area;
1435         be_sid[2] = sess->d_id.b.al_pa;
1436
1437         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1438                                 sess, be_sid);
1439         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1440                                 sess, sess->loop_id);
1441 }
1442
1443 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1444 {
1445         struct qla_tgt *tgt = sess->tgt;
1446         struct qla_hw_data *ha = tgt->ha;
1447         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1448         struct se_session *se_sess;
1449         struct tcm_qla2xxx_lport *lport;
1450
1451         BUG_ON(in_interrupt());
1452
1453         se_sess = sess->se_sess;
1454         if (!se_sess) {
1455                 pr_err("struct fc_port->se_sess is NULL\n");
1456                 dump_stack();
1457                 return;
1458         }
1459
1460         lport = vha->vha_tgt.target_lport_ptr;
1461         if (!lport) {
1462                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1463                 dump_stack();
1464                 return;
1465         }
1466         target_wait_for_sess_cmds(se_sess);
1467
1468         transport_deregister_session_configfs(sess->se_sess);
1469         transport_deregister_session(sess->se_sess);
1470 }
1471
1472 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1473                                   struct se_session *se_sess, void *p)
1474 {
1475         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1476                                 struct tcm_qla2xxx_tpg, se_tpg);
1477         struct tcm_qla2xxx_lport *lport = tpg->lport;
1478         struct qla_hw_data *ha = lport->qla_vha->hw;
1479         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1480         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1481                                 struct tcm_qla2xxx_nacl, se_node_acl);
1482         struct fc_port *qlat_sess = p;
1483         uint16_t loop_id = qlat_sess->loop_id;
1484         unsigned long flags;
1485         unsigned char be_sid[3];
1486
1487         be_sid[0] = qlat_sess->d_id.b.domain;
1488         be_sid[1] = qlat_sess->d_id.b.area;
1489         be_sid[2] = qlat_sess->d_id.b.al_pa;
1490
1491         /*
1492          * And now setup se_nacl and session pointers into HW lport internal
1493          * mappings for fabric S_ID and LOOP_ID.
1494          */
1495         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1496         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1497                                      se_sess, qlat_sess, be_sid);
1498         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1499                                         se_sess, qlat_sess, loop_id);
1500         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1501
1502         return 0;
1503 }
1504
1505 /*
1506  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1507  * to locate struct se_node_acl
1508  */
1509 static int tcm_qla2xxx_check_initiator_node_acl(
1510         scsi_qla_host_t *vha,
1511         unsigned char *fc_wwpn,
1512         struct fc_port *qlat_sess)
1513 {
1514         struct qla_hw_data *ha = vha->hw;
1515         struct tcm_qla2xxx_lport *lport;
1516         struct tcm_qla2xxx_tpg *tpg;
1517         struct se_session *se_sess;
1518         unsigned char port_name[36];
1519         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1520                        TCM_QLA2XXX_DEFAULT_TAGS;
1521
1522         lport = vha->vha_tgt.target_lport_ptr;
1523         if (!lport) {
1524                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1525                 dump_stack();
1526                 return -EINVAL;
1527         }
1528         /*
1529          * Locate the TPG=1 reference..
1530          */
1531         tpg = lport->tpg_1;
1532         if (!tpg) {
1533                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1534                 return -EINVAL;
1535         }
1536         /*
1537          * Format the FCP Initiator port_name into colon seperated values to
1538          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1539          */
1540         memset(&port_name, 0, 36);
1541         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1542         /*
1543          * Locate our struct se_node_acl either from an explict NodeACL created
1544          * via ConfigFS, or via running in TPG demo mode.
1545          */
1546         se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1547                                        sizeof(struct qla_tgt_cmd),
1548                                        TARGET_PROT_ALL, port_name,
1549                                        qlat_sess, tcm_qla2xxx_session_cb);
1550         if (IS_ERR(se_sess))
1551                 return PTR_ERR(se_sess);
1552
1553         return 0;
1554 }
1555
1556 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1557                                     uint16_t loop_id, bool conf_compl_supported)
1558 {
1559         struct qla_tgt *tgt = sess->tgt;
1560         struct qla_hw_data *ha = tgt->ha;
1561         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1562         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1563         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1564         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1565                         struct tcm_qla2xxx_nacl, se_node_acl);
1566         u32 key;
1567
1568
1569         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1570                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1571                     sess, sess->port_name,
1572                     sess->loop_id, loop_id, sess->d_id.b.domain,
1573                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1574                     s_id.b.area, s_id.b.al_pa);
1575
1576         if (sess->loop_id != loop_id) {
1577                 /*
1578                  * Because we can shuffle loop IDs around and we
1579                  * update different sessions non-atomically, we might
1580                  * have overwritten this session's old loop ID
1581                  * already, and we might end up overwriting some other
1582                  * session that will be updated later.  So we have to
1583                  * be extra careful and we can't warn about those things...
1584                  */
1585                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1586                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1587
1588                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1589
1590                 sess->loop_id = loop_id;
1591         }
1592
1593         if (sess->d_id.b24 != s_id.b24) {
1594                 key = (((u32) sess->d_id.b.domain << 16) |
1595                        ((u32) sess->d_id.b.area   <<  8) |
1596                        ((u32) sess->d_id.b.al_pa));
1597
1598                 if (btree_lookup32(&lport->lport_fcport_map, key))
1599                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1600                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1601                             sess->d_id.b.domain, sess->d_id.b.area,
1602                             sess->d_id.b.al_pa);
1603                 else
1604                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1605                              sess->d_id.b.domain, sess->d_id.b.area,
1606                              sess->d_id.b.al_pa);
1607
1608                 key = (((u32) s_id.b.domain << 16) |
1609                        ((u32) s_id.b.area   <<  8) |
1610                        ((u32) s_id.b.al_pa));
1611
1612                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1613                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1614                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1615                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1616                 } else {
1617                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1618                             GFP_ATOMIC);
1619                 }
1620
1621                 sess->d_id = s_id;
1622                 nacl->nport_id = key;
1623         }
1624
1625         sess->conf_compl_supported = conf_compl_supported;
1626
1627         /* Reset logout parameters to default */
1628         sess->logout_on_delete = 1;
1629         sess->keep_nport_handle = 0;
1630 }
1631
1632 /*
1633  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1634  */
1635 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1636         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1637         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1638         .handle_data            = tcm_qla2xxx_handle_data,
1639         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1640         .free_cmd               = tcm_qla2xxx_free_cmd,
1641         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1642         .free_session           = tcm_qla2xxx_free_session,
1643         .update_sess            = tcm_qla2xxx_update_sess,
1644         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1645         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1646         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1647         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1648         .put_sess               = tcm_qla2xxx_put_sess,
1649         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1650         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1651         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1652 };
1653
1654 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1655 {
1656         int rc;
1657
1658         rc = btree_init32(&lport->lport_fcport_map);
1659         if (rc) {
1660                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1661                 return rc;
1662         }
1663
1664         lport->lport_loopid_map =
1665                 vzalloc(array_size(65536,
1666                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1667         if (!lport->lport_loopid_map) {
1668                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1669                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1670                 btree_destroy32(&lport->lport_fcport_map);
1671                 return -ENOMEM;
1672         }
1673         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1674                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1675         return 0;
1676 }
1677
1678 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1679                                          void *target_lport_ptr,
1680                                          u64 npiv_wwpn, u64 npiv_wwnn)
1681 {
1682         struct qla_hw_data *ha = vha->hw;
1683         struct tcm_qla2xxx_lport *lport =
1684                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1685         /*
1686          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1687          */
1688         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1689         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1690         lport->qla_vha = vha;
1691
1692         return 0;
1693 }
1694
1695 static struct se_wwn *tcm_qla2xxx_make_lport(
1696         struct target_fabric_configfs *tf,
1697         struct config_group *group,
1698         const char *name)
1699 {
1700         struct tcm_qla2xxx_lport *lport;
1701         u64 wwpn;
1702         int ret = -ENODEV;
1703
1704         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1705                 return ERR_PTR(-EINVAL);
1706
1707         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1708         if (!lport) {
1709                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1710                 return ERR_PTR(-ENOMEM);
1711         }
1712         lport->lport_wwpn = wwpn;
1713         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1714                                 wwpn);
1715         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1716
1717         ret = tcm_qla2xxx_init_lport(lport);
1718         if (ret != 0)
1719                 goto out;
1720
1721         ret = qlt_lport_register(lport, wwpn, 0, 0,
1722                                  tcm_qla2xxx_lport_register_cb);
1723         if (ret != 0)
1724                 goto out_lport;
1725
1726         return &lport->lport_wwn;
1727 out_lport:
1728         vfree(lport->lport_loopid_map);
1729         btree_destroy32(&lport->lport_fcport_map);
1730 out:
1731         kfree(lport);
1732         return ERR_PTR(ret);
1733 }
1734
1735 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1736 {
1737         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1738                         struct tcm_qla2xxx_lport, lport_wwn);
1739         struct scsi_qla_host *vha = lport->qla_vha;
1740         struct se_node_acl *node;
1741         u32 key = 0;
1742
1743         /*
1744          * Call into qla2x_target.c LLD logic to complete the
1745          * shutdown of struct qla_tgt after the call to
1746          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1747          */
1748         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1749                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1750
1751         qlt_lport_deregister(vha);
1752
1753         vfree(lport->lport_loopid_map);
1754         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1755                 btree_remove32(&lport->lport_fcport_map, key);
1756         btree_destroy32(&lport->lport_fcport_map);
1757         kfree(lport);
1758 }
1759
1760 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1761                                               void *target_lport_ptr,
1762                                               u64 npiv_wwpn, u64 npiv_wwnn)
1763 {
1764         struct fc_vport *vport;
1765         struct Scsi_Host *sh = base_vha->host;
1766         struct scsi_qla_host *npiv_vha;
1767         struct tcm_qla2xxx_lport *lport =
1768                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1769         struct tcm_qla2xxx_lport *base_lport =
1770                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1771         struct fc_vport_identifiers vport_id;
1772
1773         if (qla_ini_mode_enabled(base_vha)) {
1774                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1775                 return -EPERM;
1776         }
1777
1778         if (!base_lport || !base_lport->tpg_1 ||
1779             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1780                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1781                 return -EPERM;
1782         }
1783
1784         memset(&vport_id, 0, sizeof(vport_id));
1785         vport_id.port_name = npiv_wwpn;
1786         vport_id.node_name = npiv_wwnn;
1787         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1788         vport_id.vport_type = FC_PORTTYPE_NPIV;
1789         vport_id.disable = false;
1790
1791         vport = fc_vport_create(sh, 0, &vport_id);
1792         if (!vport) {
1793                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1794                 return -ENODEV;
1795         }
1796         /*
1797          * Setup local pointer to NPIV vhba + target_lport_ptr
1798          */
1799         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1800         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1801         lport->qla_vha = npiv_vha;
1802         scsi_host_get(npiv_vha->host);
1803         return 0;
1804 }
1805
1806
1807 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1808         struct target_fabric_configfs *tf,
1809         struct config_group *group,
1810         const char *name)
1811 {
1812         struct tcm_qla2xxx_lport *lport;
1813         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1814         char *p, tmp[128];
1815         int ret;
1816
1817         snprintf(tmp, 128, "%s", name);
1818
1819         p = strchr(tmp, '@');
1820         if (!p) {
1821                 pr_err("Unable to locate NPIV '@' separator\n");
1822                 return ERR_PTR(-EINVAL);
1823         }
1824         *p++ = '\0';
1825
1826         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1827                 return ERR_PTR(-EINVAL);
1828
1829         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1830                                        &npiv_wwpn, &npiv_wwnn) < 0)
1831                 return ERR_PTR(-EINVAL);
1832
1833         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1834         if (!lport) {
1835                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1836                 return ERR_PTR(-ENOMEM);
1837         }
1838         lport->lport_npiv_wwpn = npiv_wwpn;
1839         lport->lport_npiv_wwnn = npiv_wwnn;
1840         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1841
1842         ret = tcm_qla2xxx_init_lport(lport);
1843         if (ret != 0)
1844                 goto out;
1845
1846         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1847                                  tcm_qla2xxx_lport_register_npiv_cb);
1848         if (ret != 0)
1849                 goto out_lport;
1850
1851         return &lport->lport_wwn;
1852 out_lport:
1853         vfree(lport->lport_loopid_map);
1854         btree_destroy32(&lport->lport_fcport_map);
1855 out:
1856         kfree(lport);
1857         return ERR_PTR(ret);
1858 }
1859
1860 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1861 {
1862         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1863                         struct tcm_qla2xxx_lport, lport_wwn);
1864         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1865         struct qla_hw_data *ha = npiv_vha->hw;
1866         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1867
1868         scsi_host_put(npiv_vha->host);
1869         /*
1870          * Notify libfc that we want to release the vha->fc_vport
1871          */
1872         fc_vport_terminate(npiv_vha->fc_vport);
1873         scsi_host_put(base_vha->host);
1874         kfree(lport);
1875 }
1876
1877
1878 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1879                 char *page)
1880 {
1881         return sprintf(page,
1882             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1883             QLA2XXX_VERSION, utsname()->sysname,
1884             utsname()->machine, utsname()->release);
1885 }
1886
1887 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1888
1889 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1890         &tcm_qla2xxx_wwn_attr_version,
1891         NULL,
1892 };
1893
1894 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1895         .module                         = THIS_MODULE,
1896         .name                           = "qla2xxx",
1897         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1898         /*
1899          * XXX: Limit assumes single page per scatter-gather-list entry.
1900          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1901          */
1902         .max_data_sg_nents              = 1200,
1903         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1904         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1905         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1906         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1907         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1908         .tpg_check_demo_mode_write_protect =
1909                                         tcm_qla2xxx_check_demo_write_protect,
1910         .tpg_check_prod_mode_write_protect =
1911                                         tcm_qla2xxx_check_prod_write_protect,
1912         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1913         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1914         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1915         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1916         .release_cmd                    = tcm_qla2xxx_release_cmd,
1917         .close_session                  = tcm_qla2xxx_close_session,
1918         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1919         .sess_get_initiator_sid         = NULL,
1920         .write_pending                  = tcm_qla2xxx_write_pending,
1921         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1922         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1923         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1924         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1925         .queue_status                   = tcm_qla2xxx_queue_status,
1926         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1927         .aborted_task                   = tcm_qla2xxx_aborted_task,
1928         /*
1929          * Setup function pointers for generic logic in
1930          * target_core_fabric_configfs.c
1931          */
1932         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1933         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1934         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1935         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1936         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1937
1938         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1939         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1940         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1941 };
1942
1943 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1944         .module                         = THIS_MODULE,
1945         .name                           = "qla2xxx_npiv",
1946         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1947         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1948         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1949         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1950         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1951         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1952         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1953         .tpg_check_prod_mode_write_protect =
1954             tcm_qla2xxx_check_prod_write_protect,
1955         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1956         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1957         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1958         .release_cmd                    = tcm_qla2xxx_release_cmd,
1959         .close_session                  = tcm_qla2xxx_close_session,
1960         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1961         .sess_get_initiator_sid         = NULL,
1962         .write_pending                  = tcm_qla2xxx_write_pending,
1963         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1964         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1965         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1966         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1967         .queue_status                   = tcm_qla2xxx_queue_status,
1968         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1969         .aborted_task                   = tcm_qla2xxx_aborted_task,
1970         /*
1971          * Setup function pointers for generic logic in
1972          * target_core_fabric_configfs.c
1973          */
1974         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1975         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1976         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1977         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1978         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1979
1980         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1981         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1982 };
1983
1984 static int tcm_qla2xxx_register_configfs(void)
1985 {
1986         int ret;
1987
1988         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1989             QLA2XXX_VERSION, utsname()->sysname,
1990             utsname()->machine, utsname()->release);
1991
1992         ret = target_register_template(&tcm_qla2xxx_ops);
1993         if (ret)
1994                 return ret;
1995
1996         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1997         if (ret)
1998                 goto out_fabric;
1999
2000         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
2001                                                 WQ_MEM_RECLAIM, 0);
2002         if (!tcm_qla2xxx_free_wq) {
2003                 ret = -ENOMEM;
2004                 goto out_fabric_npiv;
2005         }
2006
2007         return 0;
2008
2009 out_fabric_npiv:
2010         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2011 out_fabric:
2012         target_unregister_template(&tcm_qla2xxx_ops);
2013         return ret;
2014 }
2015
2016 static void tcm_qla2xxx_deregister_configfs(void)
2017 {
2018         destroy_workqueue(tcm_qla2xxx_free_wq);
2019
2020         target_unregister_template(&tcm_qla2xxx_ops);
2021         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2022 }
2023
2024 static int __init tcm_qla2xxx_init(void)
2025 {
2026         int ret;
2027
2028         ret = tcm_qla2xxx_register_configfs();
2029         if (ret < 0)
2030                 return ret;
2031
2032         return 0;
2033 }
2034
2035 static void __exit tcm_qla2xxx_exit(void)
2036 {
2037         tcm_qla2xxx_deregister_configfs();
2038 }
2039
2040 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2041 MODULE_LICENSE("GPL");
2042 module_init(tcm_qla2xxx_init);
2043 module_exit(tcm_qla2xxx_exit);