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 <generated/utsrelease.h>
  29 #include <linux/utsname.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 #include <target/target_core_fabric_configfs.h>
  46 #include <target/target_core_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "qla_def.h"
  50 #include "qla_target.h"
  51 #include "tcm_qla2xxx.h"
  52
  53 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  54 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  55
  56 static const struct target_core_fabric_ops tcm_qla2xxx_ops;
  57 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops;
  58
  59 /*
  60  * Parse WWN.
  61  * If strict, we require lower-case hex and colon separators to be sure
  62  * the name is the same as what would be generated by ft_format_wwn()
  63  * so the name and wwn are mapped one-to-one.
  64  */
  65 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  66 {
  67         const char *cp;
  68         char c;
  69         u32 nibble;
  70         u32 byte = 0;
  71         u32 pos = 0;
  72         u32 err;
  73
  74         *wwn = 0;
  75         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  76                 c = *cp;
  77                 if (c == '\n' && cp[1] == '\0')
  78                         continue;
  79                 if (strict && pos++ == 2 && byte++ < 7) {
  80                         pos = 0;
  81                         if (c == ':')
  82                                 continue;
  83                         err = 1;
  84                         goto fail;
  85                 }
  86                 if (c == '\0') {
  87                         err = 2;
  88                         if (strict && byte != 8)
  89                                 goto fail;
  90                         return cp - name;
  91                 }
  92                 err = 3;
  93                 if (isdigit(c))
  94                         nibble = c - '0';
  95                 else if (isxdigit(c) && (islower(c) || !strict))
  96                         nibble = tolower(c) - 'a' + 10;
  97                 else
  98                         goto fail;
  99                 *wwn = (*wwn << 4) | nibble;
 100         }
 101         err = 4;
 102 fail:
 103         pr_debug("err %u len %zu pos %u byte %u\n",
 104                         err, cp - name, pos, byte);
 105         return -1;
 106 }
 107
 108 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 109 {
 110         u8 b[8];
 111
 112         put_unaligned_be64(wwn, b);
 113         return snprintf(buf, len,
 114                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 115                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 116 }
 117
 118 static char *tcm_qla2xxx_get_fabric_name(void)
 119 {
 120         return "qla2xxx";
 121 }
 122
 123 /*
 124  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 125  */
 126 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 127 {
 128         unsigned int i, j;
 129         u8 wwn[8];
 130
 131         memset(wwn, 0, sizeof(wwn));
 132
 133         /* Validate and store the new name */
 134         for (i = 0, j = 0; i < 16; i++) {
 135                 int value;
 136
 137                 value = hex_to_bin(*ns++);
 138                 if (value >= 0)
 139                         j = (j << 4) | value;
 140                 else
 141                         return -EINVAL;
 142
 143                 if (i % 2) {
 144                         wwn[i/2] = j & 0xff;
 145                         j = 0;
 146                 }
 147         }
 148
 149         *nm = wwn_to_u64(wwn);
 150         return 0;
 151 }
 152
 153 /*
 154  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 155  * store_fc_host_vport_create()
 156  */
 157 static int tcm_qla2xxx_npiv_parse_wwn(
 158         const char *name,
 159         size_t count,
 160         u64 *wwpn,
 161         u64 *wwnn)
 162 {
 163         unsigned int cnt = count;
 164         int rc;
 165
 166         *wwpn = 0;
 167         *wwnn = 0;
 168
 169         /* count may include a LF at end of string */
 170         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 171                 cnt--;
 172
 173         /* validate we have enough characters for WWPN */
 174         if ((cnt != (16+1+16)) || (name[16] != ':'))
 175                 return -EINVAL;
 176
 177         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 178         if (rc != 0)
 179                 return rc;
 180
 181         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 182         if (rc != 0)
 183                 return rc;
 184
 185         return 0;
 186 }
 187
 188 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 189 {
 190         return "qla2xxx_npiv";
 191 }
 192
 193 static u8 tcm_qla2xxx_get_fabric_proto_ident(struct se_portal_group *se_tpg)
 194 {
 195         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 196                                 struct tcm_qla2xxx_tpg, se_tpg);
 197         struct tcm_qla2xxx_lport *lport = tpg->lport;
 198         u8 proto_id;
 199
 200         switch (lport->lport_proto_id) {
 201         case SCSI_PROTOCOL_FCP:
 202         default:
 203                 proto_id = fc_get_fabric_proto_ident(se_tpg);
 204                 break;
 205         }
 206
 207         return proto_id;
 208 }
 209
 210 static char *tcm_qla2xxx_get_fabric_wwn(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         struct tcm_qla2xxx_lport *lport = tpg->lport;
 215
 216         return lport->lport_naa_name;
 217 }
 218
 219 static u16 tcm_qla2xxx_get_tag(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         return tpg->lport_tpgt;
 224 }
 225
 226 static u32 tcm_qla2xxx_get_default_depth(struct se_portal_group *se_tpg)
 227 {
 228         return 1;
 229 }
 230
 231 static u32 tcm_qla2xxx_get_pr_transport_id(
 232         struct se_portal_group *se_tpg,
 233         struct se_node_acl *se_nacl,
 234         struct t10_pr_registration *pr_reg,
 235         int *format_code,
 236         unsigned char *buf)
 237 {
 238         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 239                                 struct tcm_qla2xxx_tpg, se_tpg);
 240         struct tcm_qla2xxx_lport *lport = tpg->lport;
 241         int ret = 0;
 242
 243         switch (lport->lport_proto_id) {
 244         case SCSI_PROTOCOL_FCP:
 245         default:
 246                 ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
 247                                         format_code, buf);
 248                 break;
 249         }
 250
 251         return ret;
 252 }
 253
 254 static u32 tcm_qla2xxx_get_pr_transport_id_len(
 255         struct se_portal_group *se_tpg,
 256         struct se_node_acl *se_nacl,
 257         struct t10_pr_registration *pr_reg,
 258         int *format_code)
 259 {
 260         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 261                                 struct tcm_qla2xxx_tpg, se_tpg);
 262         struct tcm_qla2xxx_lport *lport = tpg->lport;
 263         int ret = 0;
 264
 265         switch (lport->lport_proto_id) {
 266         case SCSI_PROTOCOL_FCP:
 267         default:
 268                 ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
 269                                         format_code);
 270                 break;
 271         }
 272
 273         return ret;
 274 }
 275
 276 static char *tcm_qla2xxx_parse_pr_out_transport_id(
 277         struct se_portal_group *se_tpg,
 278         const char *buf,
 279         u32 *out_tid_len,
 280         char **port_nexus_ptr)
 281 {
 282         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 283                                 struct tcm_qla2xxx_tpg, se_tpg);
 284         struct tcm_qla2xxx_lport *lport = tpg->lport;
 285         char *tid = NULL;
 286
 287         switch (lport->lport_proto_id) {
 288         case SCSI_PROTOCOL_FCP:
 289         default:
 290                 tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
 291                                         port_nexus_ptr);
 292                 break;
 293         }
 294
 295         return tid;
 296 }
 297
 298 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 299 {
 300         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 301                                 struct tcm_qla2xxx_tpg, se_tpg);
 302
 303         return tpg->tpg_attrib.generate_node_acls;
 304 }
 305
 306 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 307 {
 308         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 309                                 struct tcm_qla2xxx_tpg, se_tpg);
 310
 311         return tpg->tpg_attrib.cache_dynamic_acls;
 312 }
 313
 314 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 315 {
 316         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 317                                 struct tcm_qla2xxx_tpg, se_tpg);
 318
 319         return tpg->tpg_attrib.demo_mode_write_protect;
 320 }
 321
 322 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 323 {
 324         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 325                                 struct tcm_qla2xxx_tpg, se_tpg);
 326
 327         return tpg->tpg_attrib.prod_mode_write_protect;
 328 }
 329
 330 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 331 {
 332         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 333                                 struct tcm_qla2xxx_tpg, se_tpg);
 334
 335         return tpg->tpg_attrib.demo_mode_login_only;
 336 }
 337
 338 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 339 {
 340         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 341                                 struct tcm_qla2xxx_tpg, se_tpg);
 342
 343         return tpg->tpg_attrib.fabric_prot_type;
 344 }
 345
 346 static struct se_node_acl *tcm_qla2xxx_alloc_fabric_acl(
 347         struct se_portal_group *se_tpg)
 348 {
 349         struct tcm_qla2xxx_nacl *nacl;
 350
 351         nacl = kzalloc(sizeof(struct tcm_qla2xxx_nacl), GFP_KERNEL);
 352         if (!nacl) {
 353                 pr_err("Unable to allocate struct tcm_qla2xxx_nacl\n");
 354                 return NULL;
 355         }
 356
 357         return &nacl->se_node_acl;
 358 }
 359
 360 static void tcm_qla2xxx_release_fabric_acl(
 361         struct se_portal_group *se_tpg,
 362         struct se_node_acl *se_nacl)
 363 {
 364         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 365                         struct tcm_qla2xxx_nacl, se_node_acl);
 366         kfree(nacl);
 367 }
 368
 369 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 370 {
 371         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 372                                 struct tcm_qla2xxx_tpg, se_tpg);
 373
 374         return tpg->lport_tpgt;
 375 }
 376
 377 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 378 {
 379         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 380                         struct qla_tgt_mgmt_cmd, free_work);
 381
 382         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 383 }
 384
 385 /*
 386  * Called from qla_target_template->free_mcmd(), and will call
 387  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 388  * release callback.  qla_hw_data->hardware_lock is expected to be held
 389  */
 390 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 391 {
 392         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 393         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 394 }
 395
 396 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 397 {
 398         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 399
 400         cmd->cmd_in_wq = 0;
 401
 402         WARN_ON(cmd->cmd_flags &  BIT_16);
 403
 404         cmd->cmd_flags |= BIT_16;
 405         transport_generic_free_cmd(&cmd->se_cmd, 0);
 406 }
 407
 408 /*
 409  * Called from qla_target_template->free_cmd(), and will call
 410  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 411  * release callback.  qla_hw_data->hardware_lock is expected to be held
 412  */
 413 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 414 {
 415         cmd->cmd_in_wq = 1;
 416         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 417         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 418 }
 419
 420 /*
 421  * Called from struct target_core_fabric_ops->check_stop_free() context
 422  */
 423 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 424 {
 425         struct qla_tgt_cmd *cmd;
 426
 427         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 428                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 429                 cmd->cmd_flags |= BIT_14;
 430         }
 431
 432         return target_put_sess_cmd(se_cmd->se_sess, se_cmd);
 433 }
 434
 435 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 436  * fabric descriptor @se_cmd command to release
 437  */
 438 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 439 {
 440         struct qla_tgt_cmd *cmd;
 441
 442         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 443                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 444                                 struct qla_tgt_mgmt_cmd, se_cmd);
 445                 qlt_free_mcmd(mcmd);
 446                 return;
 447         }
 448
 449         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 450         qlt_free_cmd(cmd);
 451 }
 452
 453 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
 454 {
 455         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 456         struct scsi_qla_host *vha;
 457         unsigned long flags;
 458
 459         BUG_ON(!sess);
 460         vha = sess->vha;
 461
 462         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 463         target_sess_cmd_list_set_waiting(se_sess);
 464         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 465
 466         return 1;
 467 }
 468
 469 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 470 {
 471         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 472         struct scsi_qla_host *vha;
 473         unsigned long flags;
 474
 475         BUG_ON(!sess);
 476         vha = sess->vha;
 477
 478         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 479         qlt_unreg_sess(sess);
 480         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 481 }
 482
 483 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 484 {
 485         return 0;
 486 }
 487
 488 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 489 {
 490         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 491                                 struct qla_tgt_cmd, se_cmd);
 492
 493         cmd->bufflen = se_cmd->data_length;
 494         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 495
 496         cmd->sg_cnt = se_cmd->t_data_nents;
 497         cmd->sg = se_cmd->t_data_sg;
 498
 499         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 500         cmd->prot_sg = se_cmd->t_prot_sg;
 501         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 502         se_cmd->pi_err = 0;
 503
 504         /*
 505          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 506          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 507          */
 508         return qlt_rdy_to_xfer(cmd);
 509 }
 510
 511 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 512 {
 513         unsigned long flags;
 514         /*
 515          * Check for WRITE_PENDING status to determine if we need to wait for
 516          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 517          */
 518         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 519         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 520             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 521                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 522                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 523                                                 3000);
 524                 return 0;
 525         }
 526         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 527
 528         return 0;
 529 }
 530
 531 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 532 {
 533         return;
 534 }
 535
 536 static u32 tcm_qla2xxx_get_task_tag(struct se_cmd *se_cmd)
 537 {
 538         struct qla_tgt_cmd *cmd;
 539
 540         /* check for task mgmt cmd */
 541         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 542                 return 0xffffffff;
 543
 544         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 545
 546         return cmd->tag;
 547 }
 548
 549 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 550 {
 551         return 0;
 552 }
 553
 554 /*
 555  * Called from process context in qla_target.c:qlt_do_work() code
 556  */
 557 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 558         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 559         int data_dir, int bidi)
 560 {
 561         struct se_cmd *se_cmd = &cmd->se_cmd;
 562         struct se_session *se_sess;
 563         struct qla_tgt_sess *sess;
 564         int flags = TARGET_SCF_ACK_KREF;
 565
 566         if (bidi)
 567                 flags |= TARGET_SCF_BIDI_OP;
 568
 569         sess = cmd->sess;
 570         if (!sess) {
 571                 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
 572                 return -EINVAL;
 573         }
 574
 575         se_sess = sess->se_sess;
 576         if (!se_sess) {
 577                 pr_err("Unable to locate active struct se_session\n");
 578                 return -EINVAL;
 579         }
 580
 581         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 582                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 583                                 data_dir, flags);
 584 }
 585
 586 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 587 {
 588         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 589
 590         /*
 591          * Ensure that the complete FCP WRITE payload has been received.
 592          * Otherwise return an exception via CHECK_CONDITION status.
 593          */
 594         cmd->cmd_in_wq = 0;
 595         cmd->cmd_flags |= BIT_11;
 596         if (!cmd->write_data_transferred) {
 597                 /*
 598                  * Check if se_cmd has already been aborted via LUN_RESET, and
 599                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 600                  */
 601                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 602                         complete(&cmd->se_cmd.t_transport_stop_comp);
 603                         return;
 604                 }
 605
 606                 if (cmd->se_cmd.pi_err)
 607                         transport_generic_request_failure(&cmd->se_cmd,
 608                                 cmd->se_cmd.pi_err);
 609                 else
 610                         transport_generic_request_failure(&cmd->se_cmd,
 611                                 TCM_CHECK_CONDITION_ABORT_CMD);
 612
 613                 return;
 614         }
 615
 616         return target_execute_cmd(&cmd->se_cmd);
 617 }
 618
 619 /*
 620  * Called from qla_target.c:qlt_do_ctio_completion()
 621  */
 622 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 623 {
 624         cmd->cmd_flags |= BIT_10;
 625         cmd->cmd_in_wq = 1;
 626         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 627         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 628 }
 629
 630 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
 631 {
 632         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 633
 634         /* take an extra kref to prevent cmd free too early.
 635          * need to wait for SCSI status/check condition to
 636          * finish responding generate by transport_generic_request_failure.
 637          */
 638         kref_get(&cmd->se_cmd.cmd_kref);
 639         transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
 640 }
 641
 642 /*
 643  * Called from qla_target.c:qlt_do_ctio_completion()
 644  */
 645 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
 646 {
 647         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
 648         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 649 }
 650
 651 /*
 652  * Called from qla_target.c:qlt_issue_task_mgmt()
 653  */
 654 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 655         uint8_t tmr_func, uint32_t tag)
 656 {
 657         struct qla_tgt_sess *sess = mcmd->sess;
 658         struct se_cmd *se_cmd = &mcmd->se_cmd;
 659
 660         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 661                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 662 }
 663
 664 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 665 {
 666         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 667                                 struct qla_tgt_cmd, se_cmd);
 668
 669         cmd->cmd_flags |= BIT_4;
 670         cmd->bufflen = se_cmd->data_length;
 671         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 672         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 673
 674         cmd->sg_cnt = se_cmd->t_data_nents;
 675         cmd->sg = se_cmd->t_data_sg;
 676         cmd->offset = 0;
 677         cmd->cmd_flags |= BIT_3;
 678
 679         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 680         cmd->prot_sg = se_cmd->t_prot_sg;
 681         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 682         se_cmd->pi_err = 0;
 683
 684         /*
 685          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 686          */
 687         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 688                                 se_cmd->scsi_status);
 689 }
 690
 691 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 692 {
 693         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 694                                 struct qla_tgt_cmd, se_cmd);
 695         int xmit_type = QLA_TGT_XMIT_STATUS;
 696
 697         cmd->bufflen = se_cmd->data_length;
 698         cmd->sg = NULL;
 699         cmd->sg_cnt = 0;
 700         cmd->offset = 0;
 701         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 702         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 703         if (cmd->cmd_flags &  BIT_5) {
 704                 pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
 705                 dump_stack();
 706         }
 707         cmd->cmd_flags |= BIT_5;
 708
 709         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 710                 /*
 711                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 712                  * for qla_tgt_xmit_response LLD code
 713                  */
 714                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 715                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 716                         se_cmd->residual_count = 0;
 717                 }
 718                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 719                 se_cmd->residual_count += se_cmd->data_length;
 720
 721                 cmd->bufflen = 0;
 722         }
 723         /*
 724          * Now queue status response to qla2xxx LLD code and response ring
 725          */
 726         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 727 }
 728
 729 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 730 {
 731         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 732         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 733                                 struct qla_tgt_mgmt_cmd, se_cmd);
 734
 735         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 736                         mcmd, se_tmr->function, se_tmr->response);
 737         /*
 738          * Do translation between TCM TM response codes and
 739          * QLA2xxx FC TM response codes.
 740          */
 741         switch (se_tmr->response) {
 742         case TMR_FUNCTION_COMPLETE:
 743                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 744                 break;
 745         case TMR_TASK_DOES_NOT_EXIST:
 746                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 747                 break;
 748         case TMR_FUNCTION_REJECTED:
 749                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 750                 break;
 751         case TMR_LUN_DOES_NOT_EXIST:
 752         default:
 753                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 754                 break;
 755         }
 756         /*
 757          * Queue the TM response to QLA2xxx LLD to build a
 758          * CTIO response packet.
 759          */
 760         qlt_xmit_tm_rsp(mcmd);
 761 }
 762
 763 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 764 {
 765         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 766                                 struct qla_tgt_cmd, se_cmd);
 767         struct scsi_qla_host *vha = cmd->vha;
 768         struct qla_hw_data *ha = vha->hw;
 769
 770         if (!cmd->sg_mapped)
 771                 return;
 772
 773         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
 774         cmd->sg_mapped = 0;
 775 }
 776
 777 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 778                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 779 /*
 780  * Expected to be called with struct qla_hw_data->hardware_lock held
 781  */
 782 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 783 {
 784         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 785         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 786         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 787         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 788                                 struct tcm_qla2xxx_lport, lport_wwn);
 789         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 790                                 struct tcm_qla2xxx_nacl, se_node_acl);
 791         void *node;
 792
 793         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 794
 795         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 796         if (WARN_ON(node && (node != se_nacl))) {
 797                 /*
 798                  * The nacl no longer matches what we think it should be.
 799                  * Most likely a new dynamic acl has been added while
 800                  * someone dropped the hardware lock.  It clearly is a
 801                  * bug elsewhere, but this bit can't make things worse.
 802                  */
 803                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 804                                node, GFP_ATOMIC);
 805         }
 806
 807         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 808             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 809         /*
 810          * Now clear the se_nacl and session pointers from our HW lport lookup
 811          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 812          *
 813          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 814          * target_wait_for_sess_cmds() before the session waits for outstanding
 815          * I/O to complete, to avoid a race between session shutdown execution
 816          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 817          */
 818         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 819 }
 820
 821 static void tcm_qla2xxx_release_session(struct kref *kref)
 822 {
 823         struct se_session *se_sess = container_of(kref,
 824                         struct se_session, sess_kref);
 825
 826         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 827 }
 828
 829 static void tcm_qla2xxx_put_session(struct se_session *se_sess)
 830 {
 831         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 832         struct qla_hw_data *ha = sess->vha->hw;
 833         unsigned long flags;
 834
 835         spin_lock_irqsave(&ha->hardware_lock, flags);
 836         kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
 837         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 838 }
 839
 840 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 841 {
 842         if (!sess)
 843                 return;
 844
 845         assert_spin_locked(&sess->vha->hw->hardware_lock);
 846         kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
 847 }
 848
 849 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 850 {
 851         assert_spin_locked(&sess->vha->hw->hardware_lock);
 852         target_sess_cmd_list_set_waiting(sess->se_sess);
 853 }
 854
 855 static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
 856         struct se_portal_group *se_tpg,
 857         struct config_group *group,
 858         const char *name)
 859 {
 860         struct se_node_acl *se_nacl, *se_nacl_new;
 861         struct tcm_qla2xxx_nacl *nacl;
 862         u64 wwnn;
 863         u32 qla2xxx_nexus_depth;
 864
 865         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 866                 return ERR_PTR(-EINVAL);
 867
 868         se_nacl_new = tcm_qla2xxx_alloc_fabric_acl(se_tpg);
 869         if (!se_nacl_new)
 870                 return ERR_PTR(-ENOMEM);
 871 /* #warning FIXME: Hardcoded qla2xxx_nexus depth in tcm_qla2xxx_make_nodeacl */
 872         qla2xxx_nexus_depth = 1;
 873
 874         /*
 875          * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
 876          * when converting a NodeACL from demo mode -> explict
 877          */
 878         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 879                                 name, qla2xxx_nexus_depth);
 880         if (IS_ERR(se_nacl)) {
 881                 tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
 882                 return se_nacl;
 883         }
 884         /*
 885          * Locate our struct tcm_qla2xxx_nacl and set the FC Nport WWPN
 886          */
 887         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 888         nacl->nport_wwnn = wwnn;
 889         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 890
 891         return se_nacl;
 892 }
 893
 894 static void tcm_qla2xxx_drop_nodeacl(struct se_node_acl *se_acl)
 895 {
 896         struct se_portal_group *se_tpg = se_acl->se_tpg;
 897         struct tcm_qla2xxx_nacl *nacl = container_of(se_acl,
 898                                 struct tcm_qla2xxx_nacl, se_node_acl);
 899
 900         core_tpg_del_initiator_node_acl(se_tpg, se_acl, 1);
 901         kfree(nacl);
 902 }
 903
 904 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 905
 906 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 907                                                                         \
 908 static ssize_t tcm_qla2xxx_tpg_attrib_show_##name(                      \
 909         struct se_portal_group *se_tpg,                                 \
 910         char *page)                                                     \
 911 {                                                                       \
 912         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 913                         struct tcm_qla2xxx_tpg, se_tpg);                \
 914                                                                         \
 915         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 916 }                                                                       \
 917                                                                         \
 918 static ssize_t tcm_qla2xxx_tpg_attrib_store_##name(                     \
 919         struct se_portal_group *se_tpg,                                 \
 920         const char *page,                                               \
 921         size_t count)                                                   \
 922 {                                                                       \
 923         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 924                         struct tcm_qla2xxx_tpg, se_tpg);                \
 925         unsigned long val;                                              \
 926         int ret;                                                        \
 927                                                                         \
 928         ret = kstrtoul(page, 0, &val);                                  \
 929         if (ret < 0) {                                                  \
 930                 pr_err("kstrtoul() failed with"                         \
 931                                 " ret: %d\n", ret);                     \
 932                 return -EINVAL;                                         \
 933         }                                                               \
 934         ret = tcm_qla2xxx_set_attrib_##name(tpg, val);                  \
 935                                                                         \
 936         return (!ret) ? count : -EINVAL;                                \
 937 }
 938
 939 #define DEF_QLA_TPG_ATTR_BOOL(_name)                                    \
 940                                                                         \
 941 static int tcm_qla2xxx_set_attrib_##_name(                              \
 942         struct tcm_qla2xxx_tpg *tpg,                                    \
 943         unsigned long val)                                              \
 944 {                                                                       \
 945         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 946                                                                         \
 947         if ((val != 0) && (val != 1)) {                                 \
 948                 pr_err("Illegal boolean value %lu\n", val);             \
 949                 return -EINVAL;                                         \
 950         }                                                               \
 951                                                                         \
 952         a->_name = val;                                                 \
 953         return 0;                                                       \
 954 }
 955
 956 #define QLA_TPG_ATTR(_name, _mode) \
 957         TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);
 958
 959 /*
 960  * Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
 961  */
 962 DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
 963 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 964 QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 965
 966 /*
 967  Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
 968  */
 969 DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
 970 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 971 QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 972
 973 /*
 974  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
 975  */
 976 DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
 977 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 978 QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 979
 980 /*
 981  * Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
 982  */
 983 DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
 984 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 985 QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 986
 987 /*
 988  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_login_only
 989  */
 990 DEF_QLA_TPG_ATTR_BOOL(demo_mode_login_only);
 991 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 992 QLA_TPG_ATTR(demo_mode_login_only, S_IRUGO | S_IWUSR);
 993
 994 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 995         &tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
 996         &tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
 997         &tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
 998         &tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
 999         &tcm_qla2xxx_tpg_attrib_demo_mode_login_only.attr,
1000         NULL,
1001 };
1002
1003 /* End items for tcm_qla2xxx_tpg_attrib_cit */
1004
1005 static ssize_t tcm_qla2xxx_tpg_show_enable(
1006         struct se_portal_group *se_tpg,
1007         char *page)
1008 {
1009         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1010                         struct tcm_qla2xxx_tpg, se_tpg);
1011
1012         return snprintf(page, PAGE_SIZE, "%d\n",
1013                         atomic_read(&tpg->lport_tpg_enabled));
1014 }
1015
1016 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
1017 {
1018         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
1019                                 struct tcm_qla2xxx_tpg, tpg_base_work);
1020         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
1021         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
1022
1023         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
1024                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
1025                 qlt_enable_vha(base_vha);
1026         }
1027         complete(&base_tpg->tpg_base_comp);
1028 }
1029
1030 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
1031 {
1032         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
1033                                 struct tcm_qla2xxx_tpg, tpg_base_work);
1034         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
1035         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
1036
1037         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
1038                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
1039                 target_undepend_item(&se_tpg->tpg_group.cg_item);
1040         }
1041         complete(&base_tpg->tpg_base_comp);
1042 }
1043
1044 static ssize_t tcm_qla2xxx_tpg_store_enable(
1045         struct se_portal_group *se_tpg,
1046         const char *page,
1047         size_t count)
1048 {
1049         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1050                         struct tcm_qla2xxx_tpg, se_tpg);
1051         unsigned long op;
1052         int rc;
1053
1054         rc = kstrtoul(page, 0, &op);
1055         if (rc < 0) {
1056                 pr_err("kstrtoul() returned %d\n", rc);
1057                 return -EINVAL;
1058         }
1059         if ((op != 1) && (op != 0)) {
1060                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1061                 return -EINVAL;
1062         }
1063         if (op) {
1064                 if (atomic_read(&tpg->lport_tpg_enabled))
1065                         return -EEXIST;
1066
1067                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
1068         } else {
1069                 if (!atomic_read(&tpg->lport_tpg_enabled))
1070                         return count;
1071
1072                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
1073         }
1074         init_completion(&tpg->tpg_base_comp);
1075         schedule_work(&tpg->tpg_base_work);
1076         wait_for_completion(&tpg->tpg_base_comp);
1077
1078         if (op) {
1079                 if (!atomic_read(&tpg->lport_tpg_enabled))
1080                         return -ENODEV;
1081         } else {
1082                 if (atomic_read(&tpg->lport_tpg_enabled))
1083                         return -EPERM;
1084         }
1085         return count;
1086 }
1087
1088 TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);
1089
1090 static ssize_t tcm_qla2xxx_tpg_show_dynamic_sessions(
1091         struct se_portal_group *se_tpg,
1092         char *page)
1093 {
1094         return target_show_dynamic_sessions(se_tpg, page);
1095 }
1096
1097 TF_TPG_BASE_ATTR_RO(tcm_qla2xxx, dynamic_sessions);
1098
1099 static ssize_t tcm_qla2xxx_tpg_store_fabric_prot_type(
1100         struct se_portal_group *se_tpg,
1101         const char *page,
1102         size_t count)
1103 {
1104         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1105                                 struct tcm_qla2xxx_tpg, se_tpg);
1106         unsigned long val;
1107         int ret = kstrtoul(page, 0, &val);
1108
1109         if (ret) {
1110                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
1111                 return ret;
1112         }
1113         if (val != 0 && val != 1 && val != 3) {
1114                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
1115                 return -EINVAL;
1116         }
1117         tpg->tpg_attrib.fabric_prot_type = val;
1118
1119         return count;
1120 }
1121
1122 static ssize_t tcm_qla2xxx_tpg_show_fabric_prot_type(
1123         struct se_portal_group *se_tpg,
1124         char *page)
1125 {
1126         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1127                                 struct tcm_qla2xxx_tpg, se_tpg);
1128
1129         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1130 }
1131 TF_TPG_BASE_ATTR(tcm_qla2xxx, fabric_prot_type, S_IRUGO | S_IWUSR);
1132
1133 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1134         &tcm_qla2xxx_tpg_enable.attr,
1135         &tcm_qla2xxx_tpg_dynamic_sessions.attr,
1136         &tcm_qla2xxx_tpg_fabric_prot_type.attr,
1137         NULL,
1138 };
1139
1140 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1141         struct se_wwn *wwn,
1142         struct config_group *group,
1143         const char *name)
1144 {
1145         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1146                         struct tcm_qla2xxx_lport, lport_wwn);
1147         struct tcm_qla2xxx_tpg *tpg;
1148         unsigned long tpgt;
1149         int ret;
1150
1151         if (strstr(name, "tpgt_") != name)
1152                 return ERR_PTR(-EINVAL);
1153         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1154                 return ERR_PTR(-EINVAL);
1155
1156         if ((tpgt != 1)) {
1157                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1158                 return ERR_PTR(-ENOSYS);
1159         }
1160
1161         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1162         if (!tpg) {
1163                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1164                 return ERR_PTR(-ENOMEM);
1165         }
1166         tpg->lport = lport;
1167         tpg->lport_tpgt = tpgt;
1168         /*
1169          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1170          * NodeACLs
1171          */
1172         tpg->tpg_attrib.generate_node_acls = 1;
1173         tpg->tpg_attrib.demo_mode_write_protect = 1;
1174         tpg->tpg_attrib.cache_dynamic_acls = 1;
1175         tpg->tpg_attrib.demo_mode_login_only = 1;
1176
1177         ret = core_tpg_register(&tcm_qla2xxx_ops, wwn,
1178                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1179         if (ret < 0) {
1180                 kfree(tpg);
1181                 return NULL;
1182         }
1183
1184         lport->tpg_1 = tpg;
1185
1186         return &tpg->se_tpg;
1187 }
1188
1189 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1190 {
1191         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1192                         struct tcm_qla2xxx_tpg, se_tpg);
1193         struct tcm_qla2xxx_lport *lport = tpg->lport;
1194         struct scsi_qla_host *vha = lport->qla_vha;
1195         /*
1196          * Call into qla2x_target.c LLD logic to shutdown the active
1197          * FC Nexuses and disable target mode operation for this qla_hw_data
1198          */
1199         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1200                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1201
1202         core_tpg_deregister(se_tpg);
1203         /*
1204          * Clear local TPG=1 pointer for non NPIV mode.
1205          */
1206         lport->tpg_1 = NULL;
1207         kfree(tpg);
1208 }
1209
1210 static ssize_t tcm_qla2xxx_npiv_tpg_show_enable(
1211         struct se_portal_group *se_tpg,
1212         char *page)
1213 {
1214         return tcm_qla2xxx_tpg_show_enable(se_tpg, page);
1215 }
1216
1217 static ssize_t tcm_qla2xxx_npiv_tpg_store_enable(
1218         struct se_portal_group *se_tpg,
1219         const char *page,
1220         size_t count)
1221 {
1222         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1223         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1224                         struct tcm_qla2xxx_lport, lport_wwn);
1225         struct scsi_qla_host *vha = lport->qla_vha;
1226         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1227                         struct tcm_qla2xxx_tpg, se_tpg);
1228         unsigned long op;
1229         int rc;
1230
1231         rc = kstrtoul(page, 0, &op);
1232         if (rc < 0) {
1233                 pr_err("kstrtoul() returned %d\n", rc);
1234                 return -EINVAL;
1235         }
1236         if ((op != 1) && (op != 0)) {
1237                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1238                 return -EINVAL;
1239         }
1240         if (op) {
1241                 if (atomic_read(&tpg->lport_tpg_enabled))
1242                         return -EEXIST;
1243
1244                 atomic_set(&tpg->lport_tpg_enabled, 1);
1245                 qlt_enable_vha(vha);
1246         } else {
1247                 if (!atomic_read(&tpg->lport_tpg_enabled))
1248                         return count;
1249
1250                 atomic_set(&tpg->lport_tpg_enabled, 0);
1251                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1252         }
1253
1254         return count;
1255 }
1256
1257 TF_TPG_BASE_ATTR(tcm_qla2xxx_npiv, enable, S_IRUGO | S_IWUSR);
1258
1259 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1260         &tcm_qla2xxx_npiv_tpg_enable.attr,
1261         NULL,
1262 };
1263
1264 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1265         struct se_wwn *wwn,
1266         struct config_group *group,
1267         const char *name)
1268 {
1269         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1270                         struct tcm_qla2xxx_lport, lport_wwn);
1271         struct tcm_qla2xxx_tpg *tpg;
1272         unsigned long tpgt;
1273         int ret;
1274
1275         if (strstr(name, "tpgt_") != name)
1276                 return ERR_PTR(-EINVAL);
1277         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1278                 return ERR_PTR(-EINVAL);
1279
1280         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1281         if (!tpg) {
1282                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1283                 return ERR_PTR(-ENOMEM);
1284         }
1285         tpg->lport = lport;
1286         tpg->lport_tpgt = tpgt;
1287
1288         /*
1289          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1290          * NodeACLs
1291          */
1292         tpg->tpg_attrib.generate_node_acls = 1;
1293         tpg->tpg_attrib.demo_mode_write_protect = 1;
1294         tpg->tpg_attrib.cache_dynamic_acls = 1;
1295         tpg->tpg_attrib.demo_mode_login_only = 1;
1296
1297         ret = core_tpg_register(&tcm_qla2xxx_npiv_ops, wwn,
1298                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1299         if (ret < 0) {
1300                 kfree(tpg);
1301                 return NULL;
1302         }
1303         lport->tpg_1 = tpg;
1304         return &tpg->se_tpg;
1305 }
1306
1307 /*
1308  * Expected to be called with struct qla_hw_data->hardware_lock held
1309  */
1310 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1311         scsi_qla_host_t *vha,
1312         const uint8_t *s_id)
1313 {
1314         struct tcm_qla2xxx_lport *lport;
1315         struct se_node_acl *se_nacl;
1316         struct tcm_qla2xxx_nacl *nacl;
1317         u32 key;
1318
1319         lport = vha->vha_tgt.target_lport_ptr;
1320         if (!lport) {
1321                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1322                 dump_stack();
1323                 return NULL;
1324         }
1325
1326         key = (((unsigned long)s_id[0] << 16) |
1327                ((unsigned long)s_id[1] << 8) |
1328                (unsigned long)s_id[2]);
1329         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1330
1331         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1332         if (!se_nacl) {
1333                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1334                 return NULL;
1335         }
1336         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1337             se_nacl, se_nacl->initiatorname);
1338
1339         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1340         if (!nacl->qla_tgt_sess) {
1341                 pr_err("Unable to locate struct qla_tgt_sess\n");
1342                 return NULL;
1343         }
1344
1345         return nacl->qla_tgt_sess;
1346 }
1347
1348 /*
1349  * Expected to be called with struct qla_hw_data->hardware_lock held
1350  */
1351 static void tcm_qla2xxx_set_sess_by_s_id(
1352         struct tcm_qla2xxx_lport *lport,
1353         struct se_node_acl *new_se_nacl,
1354         struct tcm_qla2xxx_nacl *nacl,
1355         struct se_session *se_sess,
1356         struct qla_tgt_sess *qla_tgt_sess,
1357         uint8_t *s_id)
1358 {
1359         u32 key;
1360         void *slot;
1361         int rc;
1362
1363         key = (((unsigned long)s_id[0] << 16) |
1364                ((unsigned long)s_id[1] << 8) |
1365                (unsigned long)s_id[2]);
1366         pr_debug("set_sess_by_s_id: %06x\n", key);
1367
1368         slot = btree_lookup32(&lport->lport_fcport_map, key);
1369         if (!slot) {
1370                 if (new_se_nacl) {
1371                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1372                         nacl->nport_id = key;
1373                         rc = btree_insert32(&lport->lport_fcport_map, key,
1374                                         new_se_nacl, GFP_ATOMIC);
1375                         if (rc)
1376                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1377                                     (int)key);
1378                 } else {
1379                         pr_debug("Wiping nonexisting fc_port entry\n");
1380                 }
1381
1382                 qla_tgt_sess->se_sess = se_sess;
1383                 nacl->qla_tgt_sess = qla_tgt_sess;
1384                 return;
1385         }
1386
1387         if (nacl->qla_tgt_sess) {
1388                 if (new_se_nacl == NULL) {
1389                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1390                         btree_remove32(&lport->lport_fcport_map, key);
1391                         nacl->qla_tgt_sess = NULL;
1392                         return;
1393                 }
1394                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1395                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1396                 qla_tgt_sess->se_sess = se_sess;
1397                 nacl->qla_tgt_sess = qla_tgt_sess;
1398                 return;
1399         }
1400
1401         if (new_se_nacl == NULL) {
1402                 pr_debug("Clearing existing fc_port entry\n");
1403                 btree_remove32(&lport->lport_fcport_map, key);
1404                 return;
1405         }
1406
1407         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1408         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1409         qla_tgt_sess->se_sess = se_sess;
1410         nacl->qla_tgt_sess = qla_tgt_sess;
1411
1412         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1413             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1414 }
1415
1416 /*
1417  * Expected to be called with struct qla_hw_data->hardware_lock held
1418  */
1419 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1420         scsi_qla_host_t *vha,
1421         const uint16_t loop_id)
1422 {
1423         struct tcm_qla2xxx_lport *lport;
1424         struct se_node_acl *se_nacl;
1425         struct tcm_qla2xxx_nacl *nacl;
1426         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1427
1428         lport = vha->vha_tgt.target_lport_ptr;
1429         if (!lport) {
1430                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1431                 dump_stack();
1432                 return NULL;
1433         }
1434
1435         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1436
1437         fc_loopid = lport->lport_loopid_map + loop_id;
1438         se_nacl = fc_loopid->se_nacl;
1439         if (!se_nacl) {
1440                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1441                     loop_id);
1442                 return NULL;
1443         }
1444
1445         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1446
1447         if (!nacl->qla_tgt_sess) {
1448                 pr_err("Unable to locate struct qla_tgt_sess\n");
1449                 return NULL;
1450         }
1451
1452         return nacl->qla_tgt_sess;
1453 }
1454
1455 /*
1456  * Expected to be called with struct qla_hw_data->hardware_lock held
1457  */
1458 static void tcm_qla2xxx_set_sess_by_loop_id(
1459         struct tcm_qla2xxx_lport *lport,
1460         struct se_node_acl *new_se_nacl,
1461         struct tcm_qla2xxx_nacl *nacl,
1462         struct se_session *se_sess,
1463         struct qla_tgt_sess *qla_tgt_sess,
1464         uint16_t loop_id)
1465 {
1466         struct se_node_acl *saved_nacl;
1467         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1468
1469         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1470
1471         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1472                         lport->lport_loopid_map)[loop_id];
1473
1474         saved_nacl = fc_loopid->se_nacl;
1475         if (!saved_nacl) {
1476                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1477                 fc_loopid->se_nacl = new_se_nacl;
1478                 if (qla_tgt_sess->se_sess != se_sess)
1479                         qla_tgt_sess->se_sess = se_sess;
1480                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1481                         nacl->qla_tgt_sess = qla_tgt_sess;
1482                 return;
1483         }
1484
1485         if (nacl->qla_tgt_sess) {
1486                 if (new_se_nacl == NULL) {
1487                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1488                         fc_loopid->se_nacl = NULL;
1489                         nacl->qla_tgt_sess = NULL;
1490                         return;
1491                 }
1492
1493                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1494                 fc_loopid->se_nacl = new_se_nacl;
1495                 if (qla_tgt_sess->se_sess != se_sess)
1496                         qla_tgt_sess->se_sess = se_sess;
1497                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1498                         nacl->qla_tgt_sess = qla_tgt_sess;
1499                 return;
1500         }
1501
1502         if (new_se_nacl == NULL) {
1503                 pr_debug("Clearing fc_loopid->se_nacl\n");
1504                 fc_loopid->se_nacl = NULL;
1505                 return;
1506         }
1507
1508         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1509         fc_loopid->se_nacl = new_se_nacl;
1510         if (qla_tgt_sess->se_sess != se_sess)
1511                 qla_tgt_sess->se_sess = se_sess;
1512         if (nacl->qla_tgt_sess != qla_tgt_sess)
1513                 nacl->qla_tgt_sess = qla_tgt_sess;
1514
1515         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1516             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1517 }
1518
1519 /*
1520  * Should always be called with qla_hw_data->hardware_lock held.
1521  */
1522 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1523                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1524 {
1525         struct se_session *se_sess = sess->se_sess;
1526         unsigned char be_sid[3];
1527
1528         be_sid[0] = sess->s_id.b.domain;
1529         be_sid[1] = sess->s_id.b.area;
1530         be_sid[2] = sess->s_id.b.al_pa;
1531
1532         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1533                                 sess, be_sid);
1534         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1535                                 sess, sess->loop_id);
1536 }
1537
1538 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1539 {
1540         struct qla_tgt *tgt = sess->tgt;
1541         struct qla_hw_data *ha = tgt->ha;
1542         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1543         struct se_session *se_sess;
1544         struct se_node_acl *se_nacl;
1545         struct tcm_qla2xxx_lport *lport;
1546         struct tcm_qla2xxx_nacl *nacl;
1547
1548         BUG_ON(in_interrupt());
1549
1550         se_sess = sess->se_sess;
1551         if (!se_sess) {
1552                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1553                 dump_stack();
1554                 return;
1555         }
1556         se_nacl = se_sess->se_node_acl;
1557         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1558
1559         lport = vha->vha_tgt.target_lport_ptr;
1560         if (!lport) {
1561                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1562                 dump_stack();
1563                 return;
1564         }
1565         target_wait_for_sess_cmds(se_sess);
1566
1567         transport_deregister_session_configfs(sess->se_sess);
1568         transport_deregister_session(sess->se_sess);
1569 }
1570
1571 /*
1572  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1573  * to locate struct se_node_acl
1574  */
1575 static int tcm_qla2xxx_check_initiator_node_acl(
1576         scsi_qla_host_t *vha,
1577         unsigned char *fc_wwpn,
1578         void *qla_tgt_sess,
1579         uint8_t *s_id,
1580         uint16_t loop_id)
1581 {
1582         struct qla_hw_data *ha = vha->hw;
1583         struct tcm_qla2xxx_lport *lport;
1584         struct tcm_qla2xxx_tpg *tpg;
1585         struct tcm_qla2xxx_nacl *nacl;
1586         struct se_portal_group *se_tpg;
1587         struct se_node_acl *se_nacl;
1588         struct se_session *se_sess;
1589         struct qla_tgt_sess *sess = qla_tgt_sess;
1590         unsigned char port_name[36];
1591         unsigned long flags;
1592         int num_tags = (ha->fw_xcb_count) ? ha->fw_xcb_count :
1593                        TCM_QLA2XXX_DEFAULT_TAGS;
1594
1595         lport = vha->vha_tgt.target_lport_ptr;
1596         if (!lport) {
1597                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1598                 dump_stack();
1599                 return -EINVAL;
1600         }
1601         /*
1602          * Locate the TPG=1 reference..
1603          */
1604         tpg = lport->tpg_1;
1605         if (!tpg) {
1606                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1607                 return -EINVAL;
1608         }
1609         se_tpg = &tpg->se_tpg;
1610
1611         se_sess = transport_init_session_tags(num_tags,
1612                                               sizeof(struct qla_tgt_cmd),
1613                                               TARGET_PROT_ALL);
1614         if (IS_ERR(se_sess)) {
1615                 pr_err("Unable to initialize struct se_session\n");
1616                 return PTR_ERR(se_sess);
1617         }
1618         /*
1619          * Format the FCP Initiator port_name into colon seperated values to
1620          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1621          */
1622         memset(&port_name, 0, 36);
1623         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1624         /*
1625          * Locate our struct se_node_acl either from an explict NodeACL created
1626          * via ConfigFS, or via running in TPG demo mode.
1627          */
1628         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1629                                         port_name);
1630         if (!se_sess->se_node_acl) {
1631                 transport_free_session(se_sess);
1632                 return -EINVAL;
1633         }
1634         se_nacl = se_sess->se_node_acl;
1635         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1636         /*
1637          * And now setup the new se_nacl and session pointers into our HW lport
1638          * mappings for fabric S_ID and LOOP_ID.
1639          */
1640         spin_lock_irqsave(&ha->hardware_lock, flags);
1641         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1642                         qla_tgt_sess, s_id);
1643         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1644                         qla_tgt_sess, loop_id);
1645         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1646         /*
1647          * Finally register the new FC Nexus with TCM
1648          */
1649         transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1650
1651         return 0;
1652 }
1653
1654 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1655                                     uint16_t loop_id, bool conf_compl_supported)
1656 {
1657         struct qla_tgt *tgt = sess->tgt;
1658         struct qla_hw_data *ha = tgt->ha;
1659         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1660         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1661         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1662         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1663                         struct tcm_qla2xxx_nacl, se_node_acl);
1664         u32 key;
1665
1666
1667         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1668                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1669                     sess, sess->port_name,
1670                     sess->loop_id, loop_id, sess->s_id.b.domain,
1671                     sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1672                     s_id.b.area, s_id.b.al_pa);
1673
1674         if (sess->loop_id != loop_id) {
1675                 /*
1676                  * Because we can shuffle loop IDs around and we
1677                  * update different sessions non-atomically, we might
1678                  * have overwritten this session's old loop ID
1679                  * already, and we might end up overwriting some other
1680                  * session that will be updated later.  So we have to
1681                  * be extra careful and we can't warn about those things...
1682                  */
1683                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1684                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1685
1686                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1687
1688                 sess->loop_id = loop_id;
1689         }
1690
1691         if (sess->s_id.b24 != s_id.b24) {
1692                 key = (((u32) sess->s_id.b.domain << 16) |
1693                        ((u32) sess->s_id.b.area   <<  8) |
1694                        ((u32) sess->s_id.b.al_pa));
1695
1696                 if (btree_lookup32(&lport->lport_fcport_map, key))
1697                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1698                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1699                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1700                 else
1701                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1702                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1703
1704                 key = (((u32) s_id.b.domain << 16) |
1705                        ((u32) s_id.b.area   <<  8) |
1706                        ((u32) s_id.b.al_pa));
1707
1708                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1709                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1710                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1711                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1712                 } else {
1713                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1714                 }
1715
1716                 sess->s_id = s_id;
1717                 nacl->nport_id = key;
1718         }
1719
1720         sess->conf_compl_supported = conf_compl_supported;
1721 }
1722
1723 /*
1724  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1725  */
1726 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1727         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1728         .handle_data            = tcm_qla2xxx_handle_data,
1729         .handle_dif_err         = tcm_qla2xxx_handle_dif_err,
1730         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1731         .free_cmd               = tcm_qla2xxx_free_cmd,
1732         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1733         .free_session           = tcm_qla2xxx_free_session,
1734         .update_sess            = tcm_qla2xxx_update_sess,
1735         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1736         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1737         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1738         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1739         .put_sess               = tcm_qla2xxx_put_sess,
1740         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1741 };
1742
1743 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1744 {
1745         int rc;
1746
1747         rc = btree_init32(&lport->lport_fcport_map);
1748         if (rc) {
1749                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1750                 return rc;
1751         }
1752
1753         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1754                                 65536);
1755         if (!lport->lport_loopid_map) {
1756                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1757                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1758                 btree_destroy32(&lport->lport_fcport_map);
1759                 return -ENOMEM;
1760         }
1761         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1762                * 65536);
1763         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1764                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1765         return 0;
1766 }
1767
1768 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1769                                          void *target_lport_ptr,
1770                                          u64 npiv_wwpn, u64 npiv_wwnn)
1771 {
1772         struct qla_hw_data *ha = vha->hw;
1773         struct tcm_qla2xxx_lport *lport =
1774                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1775         /*
1776          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1777          */
1778         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1779         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1780         lport->qla_vha = vha;
1781
1782         return 0;
1783 }
1784
1785 static struct se_wwn *tcm_qla2xxx_make_lport(
1786         struct target_fabric_configfs *tf,
1787         struct config_group *group,
1788         const char *name)
1789 {
1790         struct tcm_qla2xxx_lport *lport;
1791         u64 wwpn;
1792         int ret = -ENODEV;
1793
1794         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1795                 return ERR_PTR(-EINVAL);
1796
1797         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1798         if (!lport) {
1799                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1800                 return ERR_PTR(-ENOMEM);
1801         }
1802         lport->lport_wwpn = wwpn;
1803         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1804                                 wwpn);
1805         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1806
1807         ret = tcm_qla2xxx_init_lport(lport);
1808         if (ret != 0)
1809                 goto out;
1810
1811         ret = qlt_lport_register(lport, wwpn, 0, 0,
1812                                  tcm_qla2xxx_lport_register_cb);
1813         if (ret != 0)
1814                 goto out_lport;
1815
1816         return &lport->lport_wwn;
1817 out_lport:
1818         vfree(lport->lport_loopid_map);
1819         btree_destroy32(&lport->lport_fcport_map);
1820 out:
1821         kfree(lport);
1822         return ERR_PTR(ret);
1823 }
1824
1825 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1826 {
1827         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1828                         struct tcm_qla2xxx_lport, lport_wwn);
1829         struct scsi_qla_host *vha = lport->qla_vha;
1830         struct se_node_acl *node;
1831         u32 key = 0;
1832
1833         /*
1834          * Call into qla2x_target.c LLD logic to complete the
1835          * shutdown of struct qla_tgt after the call to
1836          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1837          */
1838         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1839                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1840
1841         qlt_lport_deregister(vha);
1842
1843         vfree(lport->lport_loopid_map);
1844         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1845                 btree_remove32(&lport->lport_fcport_map, key);
1846         btree_destroy32(&lport->lport_fcport_map);
1847         kfree(lport);
1848 }
1849
1850 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1851                                               void *target_lport_ptr,
1852                                               u64 npiv_wwpn, u64 npiv_wwnn)
1853 {
1854         struct fc_vport *vport;
1855         struct Scsi_Host *sh = base_vha->host;
1856         struct scsi_qla_host *npiv_vha;
1857         struct tcm_qla2xxx_lport *lport =
1858                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1859         struct tcm_qla2xxx_lport *base_lport =
1860                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1861         struct tcm_qla2xxx_tpg *base_tpg;
1862         struct fc_vport_identifiers vport_id;
1863
1864         if (!qla_tgt_mode_enabled(base_vha)) {
1865                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1866                 return -EPERM;
1867         }
1868
1869         if (!base_lport || !base_lport->tpg_1 ||
1870             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1871                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1872                 return -EPERM;
1873         }
1874         base_tpg = base_lport->tpg_1;
1875
1876         memset(&vport_id, 0, sizeof(vport_id));
1877         vport_id.port_name = npiv_wwpn;
1878         vport_id.node_name = npiv_wwnn;
1879         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1880         vport_id.vport_type = FC_PORTTYPE_NPIV;
1881         vport_id.disable = false;
1882
1883         vport = fc_vport_create(sh, 0, &vport_id);
1884         if (!vport) {
1885                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1886                 return -ENODEV;
1887         }
1888         /*
1889          * Setup local pointer to NPIV vhba + target_lport_ptr
1890          */
1891         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1892         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1893         lport->qla_vha = npiv_vha;
1894         scsi_host_get(npiv_vha->host);
1895         return 0;
1896 }
1897
1898
1899 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1900         struct target_fabric_configfs *tf,
1901         struct config_group *group,
1902         const char *name)
1903 {
1904         struct tcm_qla2xxx_lport *lport;
1905         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1906         char *p, tmp[128];
1907         int ret;
1908
1909         snprintf(tmp, 128, "%s", name);
1910
1911         p = strchr(tmp, '@');
1912         if (!p) {
1913                 pr_err("Unable to locate NPIV '@' seperator\n");
1914                 return ERR_PTR(-EINVAL);
1915         }
1916         *p++ = '\0';
1917
1918         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1919                 return ERR_PTR(-EINVAL);
1920
1921         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1922                                        &npiv_wwpn, &npiv_wwnn) < 0)
1923                 return ERR_PTR(-EINVAL);
1924
1925         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1926         if (!lport) {
1927                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1928                 return ERR_PTR(-ENOMEM);
1929         }
1930         lport->lport_npiv_wwpn = npiv_wwpn;
1931         lport->lport_npiv_wwnn = npiv_wwnn;
1932         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1933
1934         ret = tcm_qla2xxx_init_lport(lport);
1935         if (ret != 0)
1936                 goto out;
1937
1938         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1939                                  tcm_qla2xxx_lport_register_npiv_cb);
1940         if (ret != 0)
1941                 goto out_lport;
1942
1943         return &lport->lport_wwn;
1944 out_lport:
1945         vfree(lport->lport_loopid_map);
1946         btree_destroy32(&lport->lport_fcport_map);
1947 out:
1948         kfree(lport);
1949         return ERR_PTR(ret);
1950 }
1951
1952 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1953 {
1954         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1955                         struct tcm_qla2xxx_lport, lport_wwn);
1956         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1957         struct qla_hw_data *ha = npiv_vha->hw;
1958         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1959
1960         scsi_host_put(npiv_vha->host);
1961         /*
1962          * Notify libfc that we want to release the vha->fc_vport
1963          */
1964         fc_vport_terminate(npiv_vha->fc_vport);
1965         scsi_host_put(base_vha->host);
1966         kfree(lport);
1967 }
1968
1969
1970 static ssize_t tcm_qla2xxx_wwn_show_attr_version(
1971         struct target_fabric_configfs *tf,
1972         char *page)
1973 {
1974         return sprintf(page,
1975             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1976             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1977             utsname()->machine);
1978 }
1979
1980 TF_WWN_ATTR_RO(tcm_qla2xxx, version);
1981
1982 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1983         &tcm_qla2xxx_wwn_version.attr,
1984         NULL,
1985 };
1986
1987 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1988         .module                         = THIS_MODULE,
1989         .name                           = "qla2xxx",
1990         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1991         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
1992         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1993         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1994         .tpg_get_default_depth          = tcm_qla2xxx_get_default_depth,
1995         .tpg_get_pr_transport_id        = tcm_qla2xxx_get_pr_transport_id,
1996         .tpg_get_pr_transport_id_len    = tcm_qla2xxx_get_pr_transport_id_len,
1997         .tpg_parse_pr_out_transport_id  = tcm_qla2xxx_parse_pr_out_transport_id,
1998         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1999         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
2000         .tpg_check_demo_mode_write_protect =
2001                                         tcm_qla2xxx_check_demo_write_protect,
2002         .tpg_check_prod_mode_write_protect =
2003                                         tcm_qla2xxx_check_prod_write_protect,
2004         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
2005         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
2006         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
2007         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
2008         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
2009         .check_stop_free                = tcm_qla2xxx_check_stop_free,
2010         .release_cmd                    = tcm_qla2xxx_release_cmd,
2011         .put_session                    = tcm_qla2xxx_put_session,
2012         .shutdown_session               = tcm_qla2xxx_shutdown_session,
2013         .close_session                  = tcm_qla2xxx_close_session,
2014         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
2015         .sess_get_initiator_sid         = NULL,
2016         .write_pending                  = tcm_qla2xxx_write_pending,
2017         .write_pending_status           = tcm_qla2xxx_write_pending_status,
2018         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
2019         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
2020         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
2021         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
2022         .queue_status                   = tcm_qla2xxx_queue_status,
2023         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
2024         .aborted_task                   = tcm_qla2xxx_aborted_task,
2025         /*
2026          * Setup function pointers for generic logic in
2027          * target_core_fabric_configfs.c
2028          */
2029         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
2030         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
2031         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
2032         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
2033         .fabric_post_link               = NULL,
2034         .fabric_pre_unlink              = NULL,
2035         .fabric_make_np                 = NULL,
2036         .fabric_drop_np                 = NULL,
2037         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
2038         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
2039
2040         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
2041         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
2042         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
2043 };
2044
2045 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
2046         .module                         = THIS_MODULE,
2047         .name                           = "qla2xxx_npiv",
2048         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
2049         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
2050         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
2051         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
2052         .tpg_get_default_depth          = tcm_qla2xxx_get_default_depth,
2053         .tpg_get_pr_transport_id        = tcm_qla2xxx_get_pr_transport_id,
2054         .tpg_get_pr_transport_id_len    = tcm_qla2xxx_get_pr_transport_id_len,
2055         .tpg_parse_pr_out_transport_id  = tcm_qla2xxx_parse_pr_out_transport_id,
2056         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
2057         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
2058         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
2059         .tpg_check_prod_mode_write_protect =
2060             tcm_qla2xxx_check_prod_write_protect,
2061         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
2062         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
2063         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
2064         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
2065         .check_stop_free                = tcm_qla2xxx_check_stop_free,
2066         .release_cmd                    = tcm_qla2xxx_release_cmd,
2067         .put_session                    = tcm_qla2xxx_put_session,
2068         .shutdown_session               = tcm_qla2xxx_shutdown_session,
2069         .close_session                  = tcm_qla2xxx_close_session,
2070         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
2071         .sess_get_initiator_sid         = NULL,
2072         .write_pending                  = tcm_qla2xxx_write_pending,
2073         .write_pending_status           = tcm_qla2xxx_write_pending_status,
2074         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
2075         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
2076         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
2077         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
2078         .queue_status                   = tcm_qla2xxx_queue_status,
2079         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
2080         .aborted_task                   = tcm_qla2xxx_aborted_task,
2081         /*
2082          * Setup function pointers for generic logic in
2083          * target_core_fabric_configfs.c
2084          */
2085         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
2086         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
2087         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
2088         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
2089         .fabric_post_link               = NULL,
2090         .fabric_pre_unlink              = NULL,
2091         .fabric_make_np                 = NULL,
2092         .fabric_drop_np                 = NULL,
2093         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
2094         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
2095
2096         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
2097         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
2098 };
2099
2100 static int tcm_qla2xxx_register_configfs(void)
2101 {
2102         int ret;
2103
2104         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
2105             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
2106             utsname()->machine);
2107
2108         ret = target_register_template(&tcm_qla2xxx_ops);
2109         if (ret)
2110                 return ret;
2111
2112         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
2113         if (ret)
2114                 goto out_fabric;
2115
2116         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
2117                                                 WQ_MEM_RECLAIM, 0);
2118         if (!tcm_qla2xxx_free_wq) {
2119                 ret = -ENOMEM;
2120                 goto out_fabric_npiv;
2121         }
2122
2123         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
2124         if (!tcm_qla2xxx_cmd_wq) {
2125                 ret = -ENOMEM;
2126                 goto out_free_wq;
2127         }
2128
2129         return 0;
2130
2131 out_free_wq:
2132         destroy_workqueue(tcm_qla2xxx_free_wq);
2133 out_fabric_npiv:
2134         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2135 out_fabric:
2136         target_unregister_template(&tcm_qla2xxx_ops);
2137         return ret;
2138 }
2139
2140 static void tcm_qla2xxx_deregister_configfs(void)
2141 {
2142         destroy_workqueue(tcm_qla2xxx_cmd_wq);
2143         destroy_workqueue(tcm_qla2xxx_free_wq);
2144
2145         target_unregister_template(&tcm_qla2xxx_ops);
2146         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2147 }
2148
2149 static int __init tcm_qla2xxx_init(void)
2150 {
2151         int ret;
2152
2153         ret = tcm_qla2xxx_register_configfs();
2154         if (ret < 0)
2155                 return ret;
2156
2157         return 0;
2158 }
2159
2160 static void __exit tcm_qla2xxx_exit(void)
2161 {
2162         tcm_qla2xxx_deregister_configfs();
2163 }
2164
2165 MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
2166 MODULE_LICENSE("GPL");
2167 module_init(tcm_qla2xxx_init);
2168 module_exit(tcm_qla2xxx_exit);