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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*******************************************************************************
0003  * This file contains tcm implementation using v4 configfs fabric infrastructure
0004  * for QLogic target mode HBAs
0005  *
0006  * (c) Copyright 2010-2013 Datera, Inc.
0007  *
0008  * Author: Nicholas A. Bellinger <nab@daterainc.com>
0009  *
0010  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
0011  * the TCM_FC / Open-FCoE.org fabric module.
0012  *
0013  * Copyright (c) 2010 Cisco Systems, Inc
0014  *
0015  ****************************************************************************/
0016 
0017 
0018 #include <linux/module.h>
0019 #include <linux/utsname.h>
0020 #include <linux/vmalloc.h>
0021 #include <linux/list.h>
0022 #include <linux/slab.h>
0023 #include <linux/types.h>
0024 #include <linux/string.h>
0025 #include <linux/configfs.h>
0026 #include <linux/ctype.h>
0027 #include <asm/unaligned.h>
0028 #include <scsi/scsi_host.h>
0029 #include <target/target_core_base.h>
0030 #include <target/target_core_fabric.h>
0031 
0032 #include "qla_def.h"
0033 #include "qla_target.h"
0034 #include "tcm_qla2xxx.h"
0035 
0036 static struct workqueue_struct *tcm_qla2xxx_free_wq;
0037 
0038 /*
0039  * Parse WWN.
0040  * If strict, we require lower-case hex and colon separators to be sure
0041  * the name is the same as what would be generated by ft_format_wwn()
0042  * so the name and wwn are mapped one-to-one.
0043  */
0044 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
0045 {
0046     const char *cp;
0047     char c;
0048     u32 nibble;
0049     u32 byte = 0;
0050     u32 pos = 0;
0051     u32 err;
0052 
0053     *wwn = 0;
0054     for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
0055         c = *cp;
0056         if (c == '\n' && cp[1] == '\0')
0057             continue;
0058         if (strict && pos++ == 2 && byte++ < 7) {
0059             pos = 0;
0060             if (c == ':')
0061                 continue;
0062             err = 1;
0063             goto fail;
0064         }
0065         if (c == '\0') {
0066             err = 2;
0067             if (strict && byte != 8)
0068                 goto fail;
0069             return cp - name;
0070         }
0071         err = 3;
0072         if (isdigit(c))
0073             nibble = c - '0';
0074         else if (isxdigit(c) && (islower(c) || !strict))
0075             nibble = tolower(c) - 'a' + 10;
0076         else
0077             goto fail;
0078         *wwn = (*wwn << 4) | nibble;
0079     }
0080     err = 4;
0081 fail:
0082     pr_debug("err %u len %zu pos %u byte %u\n",
0083             err, cp - name, pos, byte);
0084     return -1;
0085 }
0086 
0087 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
0088 {
0089     u8 b[8];
0090 
0091     put_unaligned_be64(wwn, b);
0092     return snprintf(buf, len,
0093         "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
0094         b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
0095 }
0096 
0097 /*
0098  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
0099  */
0100 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
0101 {
0102     unsigned int i, j;
0103     u8 wwn[8];
0104 
0105     memset(wwn, 0, sizeof(wwn));
0106 
0107     /* Validate and store the new name */
0108     for (i = 0, j = 0; i < 16; i++) {
0109         int value;
0110 
0111         value = hex_to_bin(*ns++);
0112         if (value >= 0)
0113             j = (j << 4) | value;
0114         else
0115             return -EINVAL;
0116 
0117         if (i % 2) {
0118             wwn[i/2] = j & 0xff;
0119             j = 0;
0120         }
0121     }
0122 
0123     *nm = wwn_to_u64(wwn);
0124     return 0;
0125 }
0126 
0127 /*
0128  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
0129  * store_fc_host_vport_create()
0130  */
0131 static int tcm_qla2xxx_npiv_parse_wwn(
0132     const char *name,
0133     size_t count,
0134     u64 *wwpn,
0135     u64 *wwnn)
0136 {
0137     unsigned int cnt = count;
0138     int rc;
0139 
0140     *wwpn = 0;
0141     *wwnn = 0;
0142 
0143     /* count may include a LF at end of string */
0144     if (name[cnt-1] == '\n' || name[cnt-1] == 0)
0145         cnt--;
0146 
0147     /* validate we have enough characters for WWPN */
0148     if ((cnt != (16+1+16)) || (name[16] != ':'))
0149         return -EINVAL;
0150 
0151     rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
0152     if (rc != 0)
0153         return rc;
0154 
0155     rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
0156     if (rc != 0)
0157         return rc;
0158 
0159     return 0;
0160 }
0161 
0162 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
0163 {
0164     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0165                 struct tcm_qla2xxx_tpg, se_tpg);
0166     struct tcm_qla2xxx_lport *lport = tpg->lport;
0167 
0168     return lport->lport_naa_name;
0169 }
0170 
0171 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
0172 {
0173     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0174                 struct tcm_qla2xxx_tpg, se_tpg);
0175     return tpg->lport_tpgt;
0176 }
0177 
0178 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
0179 {
0180     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0181                 struct tcm_qla2xxx_tpg, se_tpg);
0182 
0183     return tpg->tpg_attrib.generate_node_acls;
0184 }
0185 
0186 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
0187 {
0188     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0189                 struct tcm_qla2xxx_tpg, se_tpg);
0190 
0191     return tpg->tpg_attrib.cache_dynamic_acls;
0192 }
0193 
0194 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
0195 {
0196     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0197                 struct tcm_qla2xxx_tpg, se_tpg);
0198 
0199     return tpg->tpg_attrib.demo_mode_write_protect;
0200 }
0201 
0202 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
0203 {
0204     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0205                 struct tcm_qla2xxx_tpg, se_tpg);
0206 
0207     return tpg->tpg_attrib.prod_mode_write_protect;
0208 }
0209 
0210 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
0211 {
0212     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0213                 struct tcm_qla2xxx_tpg, se_tpg);
0214 
0215     return tpg->tpg_attrib.demo_mode_login_only;
0216 }
0217 
0218 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
0219 {
0220     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0221                 struct tcm_qla2xxx_tpg, se_tpg);
0222 
0223     return tpg->tpg_attrib.fabric_prot_type;
0224 }
0225 
0226 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
0227 {
0228     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0229                 struct tcm_qla2xxx_tpg, se_tpg);
0230 
0231     return tpg->lport_tpgt;
0232 }
0233 
0234 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
0235 {
0236     struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
0237             struct qla_tgt_mgmt_cmd, free_work);
0238 
0239     transport_generic_free_cmd(&mcmd->se_cmd, 0);
0240 }
0241 
0242 /*
0243  * Called from qla_target_template->free_mcmd(), and will call
0244  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
0245  * release callback.  qla_hw_data->hardware_lock is expected to be held
0246  */
0247 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
0248 {
0249     if (!mcmd)
0250         return;
0251     INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
0252     queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
0253 }
0254 
0255 static void tcm_qla2xxx_complete_free(struct work_struct *work)
0256 {
0257     struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
0258     unsigned long flags;
0259 
0260     cmd->cmd_in_wq = 0;
0261 
0262     WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
0263 
0264     /* To do: protect all tgt_counters manipulations with proper locking. */
0265     cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
0266     cmd->trc_flags |= TRC_CMD_FREE;
0267     cmd->cmd_sent_to_fw = 0;
0268 
0269     spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
0270     list_del_init(&cmd->sess_cmd_list);
0271     spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
0272 
0273     transport_generic_free_cmd(&cmd->se_cmd, 0);
0274 }
0275 
0276 static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
0277 {
0278     struct se_session *se_sess = sess->se_sess;
0279     struct qla_tgt_cmd *cmd;
0280     int tag, cpu;
0281 
0282     tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
0283     if (tag < 0)
0284         return NULL;
0285 
0286     cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
0287     memset(cmd, 0, sizeof(struct qla_tgt_cmd));
0288     cmd->se_cmd.map_tag = tag;
0289     cmd->se_cmd.map_cpu = cpu;
0290 
0291     return cmd;
0292 }
0293 
0294 static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
0295 {
0296     target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
0297 }
0298 
0299 /*
0300  * Called from qla_target_template->free_cmd(), and will call
0301  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
0302  * release callback.  qla_hw_data->hardware_lock is expected to be held
0303  */
0304 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
0305 {
0306     cmd->qpair->tgt_counters.core_qla_free_cmd++;
0307     cmd->cmd_in_wq = 1;
0308 
0309     WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
0310     cmd->trc_flags |= TRC_CMD_DONE;
0311 
0312     INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
0313     queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
0314 }
0315 
0316 /*
0317  * Called from struct target_core_fabric_ops->check_stop_free() context
0318  */
0319 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
0320 {
0321     struct qla_tgt_cmd *cmd;
0322 
0323     if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
0324         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
0325         cmd->trc_flags |= TRC_CMD_CHK_STOP;
0326     }
0327 
0328     return target_put_sess_cmd(se_cmd);
0329 }
0330 
0331 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
0332  * fabric descriptor @se_cmd command to release
0333  */
0334 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
0335 {
0336     struct qla_tgt_cmd *cmd;
0337 
0338     if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
0339         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
0340                 struct qla_tgt_mgmt_cmd, se_cmd);
0341         qlt_free_mcmd(mcmd);
0342         return;
0343     }
0344     cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
0345 
0346     if (WARN_ON(cmd->cmd_sent_to_fw))
0347         return;
0348 
0349     qlt_free_cmd(cmd);
0350 }
0351 
0352 static void tcm_qla2xxx_release_session(struct kref *kref)
0353 {
0354     struct fc_port  *sess = container_of(kref,
0355         struct fc_port, sess_kref);
0356 
0357     qlt_unreg_sess(sess);
0358 }
0359 
0360 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
0361 {
0362     if (!sess)
0363         return;
0364 
0365     kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
0366 }
0367 
0368 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
0369 {
0370     struct fc_port *sess = se_sess->fabric_sess_ptr;
0371 
0372     BUG_ON(!sess);
0373 
0374     target_stop_session(se_sess);
0375 
0376     sess->explicit_logout = 1;
0377     tcm_qla2xxx_put_sess(sess);
0378 }
0379 
0380 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
0381 {
0382     return 0;
0383 }
0384 
0385 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
0386 {
0387     struct qla_tgt_cmd *cmd = container_of(se_cmd,
0388                 struct qla_tgt_cmd, se_cmd);
0389 
0390     if (cmd->aborted) {
0391         /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
0392          * can get ahead of this cmd. tcm_qla2xxx_aborted_task
0393          * already kick start the free.
0394          */
0395         pr_debug("write_pending aborted cmd[%p] refcount %d "
0396             "transport_state %x, t_state %x, se_cmd_flags %x\n",
0397             cmd, kref_read(&cmd->se_cmd.cmd_kref),
0398             cmd->se_cmd.transport_state,
0399             cmd->se_cmd.t_state,
0400             cmd->se_cmd.se_cmd_flags);
0401         transport_generic_request_failure(&cmd->se_cmd,
0402             TCM_CHECK_CONDITION_ABORT_CMD);
0403         return 0;
0404     }
0405     cmd->trc_flags |= TRC_XFR_RDY;
0406     cmd->bufflen = se_cmd->data_length;
0407     cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
0408 
0409     cmd->sg_cnt = se_cmd->t_data_nents;
0410     cmd->sg = se_cmd->t_data_sg;
0411 
0412     cmd->prot_sg_cnt = se_cmd->t_prot_nents;
0413     cmd->prot_sg = se_cmd->t_prot_sg;
0414     cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
0415     se_cmd->pi_err = 0;
0416 
0417     /*
0418      * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
0419      * the SGL mappings into PCIe memory for incoming FCP WRITE data.
0420      */
0421     return qlt_rdy_to_xfer(cmd);
0422 }
0423 
0424 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
0425 {
0426     return;
0427 }
0428 
0429 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
0430 {
0431     if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
0432         struct qla_tgt_cmd *cmd = container_of(se_cmd,
0433                 struct qla_tgt_cmd, se_cmd);
0434         return cmd->state;
0435     }
0436 
0437     return 0;
0438 }
0439 
0440 /*
0441  * Called from process context in qla_target.c:qlt_do_work() code
0442  */
0443 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
0444     unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
0445     int data_dir, int bidi)
0446 {
0447     struct se_cmd *se_cmd = &cmd->se_cmd;
0448     struct se_session *se_sess;
0449     struct fc_port *sess;
0450 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
0451     struct se_portal_group *se_tpg;
0452     struct tcm_qla2xxx_tpg *tpg;
0453 #endif
0454     int rc, target_flags = TARGET_SCF_ACK_KREF;
0455     unsigned long flags;
0456 
0457     if (bidi)
0458         target_flags |= TARGET_SCF_BIDI_OP;
0459 
0460     if (se_cmd->cpuid != WORK_CPU_UNBOUND)
0461         target_flags |= TARGET_SCF_USE_CPUID;
0462 
0463     sess = cmd->sess;
0464     if (!sess) {
0465         pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
0466         return -EINVAL;
0467     }
0468 
0469     se_sess = sess->se_sess;
0470     if (!se_sess) {
0471         pr_err("Unable to locate active struct se_session\n");
0472         return -EINVAL;
0473     }
0474 
0475 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
0476     se_tpg = se_sess->se_tpg;
0477     tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
0478     if (unlikely(tpg->tpg_attrib.jam_host)) {
0479         /* return, and dont run target_submit_cmd,discarding command */
0480         return 0;
0481     }
0482 #endif
0483     cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
0484 
0485     spin_lock_irqsave(&sess->sess_cmd_lock, flags);
0486     list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
0487     spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
0488 
0489     rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
0490                  cmd->unpacked_lun, data_length, fcp_task_attr,
0491                  data_dir, target_flags);
0492     if (rc)
0493         return rc;
0494 
0495     if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
0496                    GFP_KERNEL))
0497         return 0;
0498 
0499     target_submit(se_cmd);
0500     return 0;
0501 }
0502 
0503 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
0504 {
0505     struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
0506 
0507     /*
0508      * Ensure that the complete FCP WRITE payload has been received.
0509      * Otherwise return an exception via CHECK_CONDITION status.
0510      */
0511     cmd->cmd_in_wq = 0;
0512     cmd->cmd_sent_to_fw = 0;
0513     if (cmd->aborted) {
0514         transport_generic_request_failure(&cmd->se_cmd,
0515             TCM_CHECK_CONDITION_ABORT_CMD);
0516         return;
0517     }
0518 
0519     cmd->qpair->tgt_counters.qla_core_ret_ctio++;
0520     if (!cmd->write_data_transferred) {
0521         switch (cmd->dif_err_code) {
0522         case DIF_ERR_GRD:
0523             cmd->se_cmd.pi_err =
0524                 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
0525             break;
0526         case DIF_ERR_REF:
0527             cmd->se_cmd.pi_err =
0528                 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
0529             break;
0530         case DIF_ERR_APP:
0531             cmd->se_cmd.pi_err =
0532                 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
0533             break;
0534         case DIF_ERR_NONE:
0535         default:
0536             break;
0537         }
0538 
0539         if (cmd->se_cmd.pi_err)
0540             transport_generic_request_failure(&cmd->se_cmd,
0541                 cmd->se_cmd.pi_err);
0542         else
0543             transport_generic_request_failure(&cmd->se_cmd,
0544                 TCM_CHECK_CONDITION_ABORT_CMD);
0545 
0546         return;
0547     }
0548 
0549     return target_execute_cmd(&cmd->se_cmd);
0550 }
0551 
0552 /*
0553  * Called from qla_target.c:qlt_do_ctio_completion()
0554  */
0555 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
0556 {
0557     cmd->trc_flags |= TRC_DATA_IN;
0558     cmd->cmd_in_wq = 1;
0559     INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
0560     queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
0561 }
0562 
0563 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
0564 {
0565     return 0;
0566 }
0567 
0568 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
0569     uint16_t *pfw_prot_opts)
0570 {
0571     struct se_cmd *se_cmd = &cmd->se_cmd;
0572 
0573     if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
0574         *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
0575 
0576     if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
0577         *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
0578 
0579     return 0;
0580 }
0581 
0582 /*
0583  * Called from qla_target.c:qlt_issue_task_mgmt()
0584  */
0585 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
0586     uint16_t tmr_func, uint32_t tag)
0587 {
0588     struct fc_port *sess = mcmd->sess;
0589     struct se_cmd *se_cmd = &mcmd->se_cmd;
0590     int transl_tmr_func = 0;
0591 
0592     switch (tmr_func) {
0593     case QLA_TGT_ABTS:
0594         pr_debug("%ld: ABTS received\n", sess->vha->host_no);
0595         transl_tmr_func = TMR_ABORT_TASK;
0596         break;
0597     case QLA_TGT_2G_ABORT_TASK:
0598         pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
0599         transl_tmr_func = TMR_ABORT_TASK;
0600         break;
0601     case QLA_TGT_CLEAR_ACA:
0602         pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
0603         transl_tmr_func = TMR_CLEAR_ACA;
0604         break;
0605     case QLA_TGT_TARGET_RESET:
0606         pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
0607         transl_tmr_func = TMR_TARGET_WARM_RESET;
0608         break;
0609     case QLA_TGT_LUN_RESET:
0610         pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
0611         transl_tmr_func = TMR_LUN_RESET;
0612         break;
0613     case QLA_TGT_CLEAR_TS:
0614         pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
0615         transl_tmr_func = TMR_CLEAR_TASK_SET;
0616         break;
0617     case QLA_TGT_ABORT_TS:
0618         pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
0619         transl_tmr_func = TMR_ABORT_TASK_SET;
0620         break;
0621     default:
0622         pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
0623             sess->vha->host_no, tmr_func);
0624         return -ENOSYS;
0625     }
0626 
0627     return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
0628         transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
0629 }
0630 
0631 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
0632     uint64_t tag)
0633 {
0634     struct qla_tgt_cmd *cmd;
0635     unsigned long flags;
0636 
0637     if (!sess->se_sess)
0638         return NULL;
0639 
0640     spin_lock_irqsave(&sess->sess_cmd_lock, flags);
0641     list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
0642         if (cmd->se_cmd.tag == tag)
0643             goto done;
0644     }
0645     cmd = NULL;
0646 done:
0647     spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
0648 
0649     return cmd;
0650 }
0651 
0652 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
0653 {
0654     struct qla_tgt_cmd *cmd = container_of(se_cmd,
0655                 struct qla_tgt_cmd, se_cmd);
0656 
0657     if (cmd->aborted) {
0658         /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
0659          * can get ahead of this cmd. tcm_qla2xxx_aborted_task
0660          * already kick start the free.
0661          */
0662         pr_debug("queue_data_in aborted cmd[%p] refcount %d "
0663             "transport_state %x, t_state %x, se_cmd_flags %x\n",
0664             cmd, kref_read(&cmd->se_cmd.cmd_kref),
0665             cmd->se_cmd.transport_state,
0666             cmd->se_cmd.t_state,
0667             cmd->se_cmd.se_cmd_flags);
0668         return 0;
0669     }
0670 
0671     cmd->trc_flags |= TRC_XMIT_DATA;
0672     cmd->bufflen = se_cmd->data_length;
0673     cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
0674 
0675     cmd->sg_cnt = se_cmd->t_data_nents;
0676     cmd->sg = se_cmd->t_data_sg;
0677     cmd->offset = 0;
0678 
0679     cmd->prot_sg_cnt = se_cmd->t_prot_nents;
0680     cmd->prot_sg = se_cmd->t_prot_sg;
0681     cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
0682     se_cmd->pi_err = 0;
0683 
0684     /*
0685      * Now queue completed DATA_IN the qla2xxx LLD and response ring
0686      */
0687     return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
0688                 se_cmd->scsi_status);
0689 }
0690 
0691 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
0692 {
0693     struct qla_tgt_cmd *cmd = container_of(se_cmd,
0694                 struct qla_tgt_cmd, se_cmd);
0695     int xmit_type = QLA_TGT_XMIT_STATUS;
0696 
0697     if (cmd->aborted) {
0698         /*
0699          * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
0700          * can get ahead of this cmd. tcm_qla2xxx_aborted_task
0701          * already kick start the free.
0702          */
0703         pr_debug(
0704             "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
0705             cmd, kref_read(&cmd->se_cmd.cmd_kref),
0706             cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
0707             cmd->se_cmd.se_cmd_flags);
0708         return 0;
0709     }
0710     cmd->bufflen = se_cmd->data_length;
0711     cmd->sg = NULL;
0712     cmd->sg_cnt = 0;
0713     cmd->offset = 0;
0714     cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
0715     cmd->trc_flags |= TRC_XMIT_STATUS;
0716 
0717     if (se_cmd->data_direction == DMA_FROM_DEVICE) {
0718         /*
0719          * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
0720          * for qla_tgt_xmit_response LLD code
0721          */
0722         if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
0723             se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
0724             se_cmd->residual_count = 0;
0725         }
0726         se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
0727         se_cmd->residual_count += se_cmd->data_length;
0728 
0729         cmd->bufflen = 0;
0730     }
0731     /*
0732      * Now queue status response to qla2xxx LLD code and response ring
0733      */
0734     return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
0735 }
0736 
0737 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
0738 {
0739     struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
0740     struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
0741                 struct qla_tgt_mgmt_cmd, se_cmd);
0742 
0743     pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
0744             mcmd, se_tmr->function, se_tmr->response);
0745     /*
0746      * Do translation between TCM TM response codes and
0747      * QLA2xxx FC TM response codes.
0748      */
0749     switch (se_tmr->response) {
0750     case TMR_FUNCTION_COMPLETE:
0751         mcmd->fc_tm_rsp = FC_TM_SUCCESS;
0752         break;
0753     case TMR_TASK_DOES_NOT_EXIST:
0754         mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
0755         break;
0756     case TMR_FUNCTION_REJECTED:
0757         mcmd->fc_tm_rsp = FC_TM_REJECT;
0758         break;
0759     case TMR_LUN_DOES_NOT_EXIST:
0760     default:
0761         mcmd->fc_tm_rsp = FC_TM_FAILED;
0762         break;
0763     }
0764     /*
0765      * Queue the TM response to QLA2xxx LLD to build a
0766      * CTIO response packet.
0767      */
0768     qlt_xmit_tm_rsp(mcmd);
0769 }
0770 
0771 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
0772 {
0773     struct qla_tgt_cmd *cmd;
0774     unsigned long flags;
0775 
0776     if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
0777         return;
0778 
0779     cmd  = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
0780 
0781     spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
0782     list_del_init(&cmd->sess_cmd_list);
0783     spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
0784 
0785     qlt_abort_cmd(cmd);
0786 }
0787 
0788 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
0789             struct tcm_qla2xxx_nacl *, struct fc_port *);
0790 /*
0791  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
0792  */
0793 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
0794 {
0795     struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
0796     struct se_portal_group *se_tpg = se_nacl->se_tpg;
0797     struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
0798     struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
0799                 struct tcm_qla2xxx_lport, lport_wwn);
0800     struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
0801                 struct tcm_qla2xxx_nacl, se_node_acl);
0802     void *node;
0803 
0804     pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
0805 
0806     node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
0807     if (WARN_ON(node && (node != se_nacl))) {
0808         /*
0809          * The nacl no longer matches what we think it should be.
0810          * Most likely a new dynamic acl has been added while
0811          * someone dropped the hardware lock.  It clearly is a
0812          * bug elsewhere, but this bit can't make things worse.
0813          */
0814         btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
0815                    node, GFP_ATOMIC);
0816     }
0817 
0818     pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
0819         se_nacl, nacl->nport_wwnn, nacl->nport_id);
0820     /*
0821      * Now clear the se_nacl and session pointers from our HW lport lookup
0822      * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
0823      *
0824      * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
0825      * target_wait_for_sess_cmds() before the session waits for outstanding
0826      * I/O to complete, to avoid a race between session shutdown execution
0827      * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
0828      */
0829     tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
0830 }
0831 
0832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
0833 {
0834     target_stop_session(sess->se_sess);
0835 }
0836 
0837 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
0838         const char *name)
0839 {
0840     struct tcm_qla2xxx_nacl *nacl =
0841         container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
0842     u64 wwnn;
0843 
0844     if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
0845         return -EINVAL;
0846 
0847     nacl->nport_wwnn = wwnn;
0848     tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
0849 
0850     return 0;
0851 }
0852 
0853 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
0854 
0855 #define DEF_QLA_TPG_ATTRIB(name)                    \
0856                                     \
0857 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(            \
0858         struct config_item *item, char *page)           \
0859 {                                   \
0860     struct se_portal_group *se_tpg = attrib_to_tpg(item);       \
0861     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,      \
0862             struct tcm_qla2xxx_tpg, se_tpg);        \
0863                                     \
0864     return sprintf(page, "%d\n", tpg->tpg_attrib.name); \
0865 }                                   \
0866                                     \
0867 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(           \
0868         struct config_item *item, const char *page, size_t count) \
0869 {                                   \
0870     struct se_portal_group *se_tpg = attrib_to_tpg(item);       \
0871     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,      \
0872             struct tcm_qla2xxx_tpg, se_tpg);        \
0873     struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;        \
0874     unsigned long val;                      \
0875     int ret;                            \
0876                                     \
0877     ret = kstrtoul(page, 0, &val);                  \
0878     if (ret < 0) {                          \
0879         pr_err("kstrtoul() failed with"             \
0880                 " ret: %d\n", ret);         \
0881         return -EINVAL;                     \
0882     }                               \
0883                                     \
0884     if ((val != 0) && (val != 1)) {                 \
0885         pr_err("Illegal boolean value %lu\n", val);     \
0886         return -EINVAL;                     \
0887     }                               \
0888                                     \
0889     a->name = val;                          \
0890                                     \
0891     return count;                           \
0892 }                                   \
0893 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
0894 
0895 DEF_QLA_TPG_ATTRIB(generate_node_acls);
0896 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
0897 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
0898 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
0899 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
0900 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
0901 DEF_QLA_TPG_ATTRIB(jam_host);
0902 #endif
0903 
0904 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
0905     &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
0906     &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
0907     &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
0908     &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
0909     &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
0910 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
0911     &tcm_qla2xxx_tpg_attrib_attr_jam_host,
0912 #endif
0913     NULL,
0914 };
0915 
0916 /* End items for tcm_qla2xxx_tpg_attrib_cit */
0917 
0918 static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg,
0919                   bool enable)
0920 {
0921     struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
0922     struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
0923             struct tcm_qla2xxx_lport, lport_wwn);
0924     struct scsi_qla_host *vha = lport->qla_vha;
0925     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0926             struct tcm_qla2xxx_tpg, se_tpg);
0927 
0928     if (enable) {
0929         if (atomic_read(&tpg->lport_tpg_enabled))
0930             return -EEXIST;
0931 
0932         atomic_set(&tpg->lport_tpg_enabled, 1);
0933         qlt_enable_vha(vha);
0934     } else {
0935         if (!atomic_read(&tpg->lport_tpg_enabled))
0936             return 0;
0937 
0938         atomic_set(&tpg->lport_tpg_enabled, 0);
0939         qlt_stop_phase1(vha->vha_tgt.qla_tgt);
0940         qlt_stop_phase2(vha->vha_tgt.qla_tgt);
0941     }
0942 
0943     return 0;
0944 }
0945 
0946 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
0947         char *page)
0948 {
0949     return target_show_dynamic_sessions(to_tpg(item), page);
0950 }
0951 
0952 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
0953         const char *page, size_t count)
0954 {
0955     struct se_portal_group *se_tpg = to_tpg(item);
0956     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0957                 struct tcm_qla2xxx_tpg, se_tpg);
0958     unsigned long val;
0959     int ret = kstrtoul(page, 0, &val);
0960 
0961     if (ret) {
0962         pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
0963         return ret;
0964     }
0965     if (val != 0 && val != 1 && val != 3) {
0966         pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
0967         return -EINVAL;
0968     }
0969     tpg->tpg_attrib.fabric_prot_type = val;
0970 
0971     return count;
0972 }
0973 
0974 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
0975         char *page)
0976 {
0977     struct se_portal_group *se_tpg = to_tpg(item);
0978     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
0979                 struct tcm_qla2xxx_tpg, se_tpg);
0980 
0981     return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
0982 }
0983 
0984 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
0985 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
0986 
0987 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
0988     &tcm_qla2xxx_tpg_attr_dynamic_sessions,
0989     &tcm_qla2xxx_tpg_attr_fabric_prot_type,
0990     NULL,
0991 };
0992 
0993 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
0994                             const char *name)
0995 {
0996     struct tcm_qla2xxx_lport *lport = container_of(wwn,
0997             struct tcm_qla2xxx_lport, lport_wwn);
0998     struct tcm_qla2xxx_tpg *tpg;
0999     unsigned long tpgt;
1000     int ret;
1001 
1002     if (strstr(name, "tpgt_") != name)
1003         return ERR_PTR(-EINVAL);
1004     if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1005         return ERR_PTR(-EINVAL);
1006 
1007     if ((tpgt != 1)) {
1008         pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1009         return ERR_PTR(-ENOSYS);
1010     }
1011 
1012     tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1013     if (!tpg) {
1014         pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1015         return ERR_PTR(-ENOMEM);
1016     }
1017     tpg->lport = lport;
1018     tpg->lport_tpgt = tpgt;
1019     /*
1020      * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1021      * NodeACLs
1022      */
1023     tpg->tpg_attrib.generate_node_acls = 1;
1024     tpg->tpg_attrib.demo_mode_write_protect = 1;
1025     tpg->tpg_attrib.cache_dynamic_acls = 1;
1026     tpg->tpg_attrib.demo_mode_login_only = 1;
1027     tpg->tpg_attrib.jam_host = 0;
1028 
1029     ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1030     if (ret < 0) {
1031         kfree(tpg);
1032         return NULL;
1033     }
1034 
1035     lport->tpg_1 = tpg;
1036 
1037     return &tpg->se_tpg;
1038 }
1039 
1040 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1041 {
1042     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1043             struct tcm_qla2xxx_tpg, se_tpg);
1044     struct tcm_qla2xxx_lport *lport = tpg->lport;
1045     struct scsi_qla_host *vha = lport->qla_vha;
1046     /*
1047      * Call into qla2x_target.c LLD logic to shutdown the active
1048      * FC Nexuses and disable target mode operation for this qla_hw_data
1049      */
1050     if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1051         qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1052 
1053     core_tpg_deregister(se_tpg);
1054     /*
1055      * Clear local TPG=1 pointer for non NPIV mode.
1056      */
1057     lport->tpg_1 = NULL;
1058     kfree(tpg);
1059 }
1060 
1061 static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg,
1062                     bool enable)
1063 {
1064     struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1065     struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1066             struct tcm_qla2xxx_lport, lport_wwn);
1067     struct scsi_qla_host *vha = lport->qla_vha;
1068     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1069             struct tcm_qla2xxx_tpg, se_tpg);
1070 
1071     if (enable) {
1072         if (atomic_read(&tpg->lport_tpg_enabled))
1073             return -EEXIST;
1074 
1075         atomic_set(&tpg->lport_tpg_enabled, 1);
1076         qlt_enable_vha(vha);
1077     } else {
1078         if (!atomic_read(&tpg->lport_tpg_enabled))
1079             return 0;
1080 
1081         atomic_set(&tpg->lport_tpg_enabled, 0);
1082         qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1083         qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1084     }
1085 
1086     return 0;
1087 }
1088 
1089 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1090                              const char *name)
1091 {
1092     struct tcm_qla2xxx_lport *lport = container_of(wwn,
1093             struct tcm_qla2xxx_lport, lport_wwn);
1094     struct tcm_qla2xxx_tpg *tpg;
1095     unsigned long tpgt;
1096     int ret;
1097 
1098     if (strstr(name, "tpgt_") != name)
1099         return ERR_PTR(-EINVAL);
1100     if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1101         return ERR_PTR(-EINVAL);
1102 
1103     tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1104     if (!tpg) {
1105         pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1106         return ERR_PTR(-ENOMEM);
1107     }
1108     tpg->lport = lport;
1109     tpg->lport_tpgt = tpgt;
1110 
1111     /*
1112      * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1113      * NodeACLs
1114      */
1115     tpg->tpg_attrib.generate_node_acls = 1;
1116     tpg->tpg_attrib.demo_mode_write_protect = 1;
1117     tpg->tpg_attrib.cache_dynamic_acls = 1;
1118     tpg->tpg_attrib.demo_mode_login_only = 1;
1119 
1120     ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1121     if (ret < 0) {
1122         kfree(tpg);
1123         return NULL;
1124     }
1125     lport->tpg_1 = tpg;
1126     return &tpg->se_tpg;
1127 }
1128 
1129 /*
1130  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1131  */
1132 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1133                              const be_id_t s_id)
1134 {
1135     struct tcm_qla2xxx_lport *lport;
1136     struct se_node_acl *se_nacl;
1137     struct tcm_qla2xxx_nacl *nacl;
1138     u32 key;
1139 
1140     lport = vha->vha_tgt.target_lport_ptr;
1141     if (!lport) {
1142         pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1143         dump_stack();
1144         return NULL;
1145     }
1146 
1147     key = sid_to_key(s_id);
1148     pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1149 
1150     se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1151     if (!se_nacl) {
1152         pr_debug("Unable to locate s_id: 0x%06x\n", key);
1153         return NULL;
1154     }
1155     pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1156         se_nacl, se_nacl->initiatorname);
1157 
1158     nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1159     if (!nacl->fc_port) {
1160         pr_err("Unable to locate struct fc_port\n");
1161         return NULL;
1162     }
1163 
1164     return nacl->fc_port;
1165 }
1166 
1167 /*
1168  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1169  */
1170 static void tcm_qla2xxx_set_sess_by_s_id(
1171     struct tcm_qla2xxx_lport *lport,
1172     struct se_node_acl *new_se_nacl,
1173     struct tcm_qla2xxx_nacl *nacl,
1174     struct se_session *se_sess,
1175     struct fc_port *fc_port,
1176     be_id_t s_id)
1177 {
1178     u32 key;
1179     void *slot;
1180     int rc;
1181 
1182     key = sid_to_key(s_id);
1183     pr_debug("set_sess_by_s_id: %06x\n", key);
1184 
1185     slot = btree_lookup32(&lport->lport_fcport_map, key);
1186     if (!slot) {
1187         if (new_se_nacl) {
1188             pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1189             nacl->nport_id = key;
1190             rc = btree_insert32(&lport->lport_fcport_map, key,
1191                     new_se_nacl, GFP_ATOMIC);
1192             if (rc)
1193                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1194                     (int)key);
1195         } else {
1196             pr_debug("Wiping nonexisting fc_port entry\n");
1197         }
1198 
1199         fc_port->se_sess = se_sess;
1200         nacl->fc_port = fc_port;
1201         return;
1202     }
1203 
1204     if (nacl->fc_port) {
1205         if (new_se_nacl == NULL) {
1206             pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1207             btree_remove32(&lport->lport_fcport_map, key);
1208             nacl->fc_port = NULL;
1209             return;
1210         }
1211         pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1212         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1213         fc_port->se_sess = se_sess;
1214         nacl->fc_port = fc_port;
1215         return;
1216     }
1217 
1218     if (new_se_nacl == NULL) {
1219         pr_debug("Clearing existing fc_port entry\n");
1220         btree_remove32(&lport->lport_fcport_map, key);
1221         return;
1222     }
1223 
1224     pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1225     btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1226     fc_port->se_sess = se_sess;
1227     nacl->fc_port = fc_port;
1228 
1229     pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1230         nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1231 }
1232 
1233 /*
1234  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1235  */
1236 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1237     scsi_qla_host_t *vha,
1238     const uint16_t loop_id)
1239 {
1240     struct tcm_qla2xxx_lport *lport;
1241     struct se_node_acl *se_nacl;
1242     struct tcm_qla2xxx_nacl *nacl;
1243     struct tcm_qla2xxx_fc_loopid *fc_loopid;
1244 
1245     lport = vha->vha_tgt.target_lport_ptr;
1246     if (!lport) {
1247         pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1248         dump_stack();
1249         return NULL;
1250     }
1251 
1252     pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1253 
1254     fc_loopid = lport->lport_loopid_map + loop_id;
1255     se_nacl = fc_loopid->se_nacl;
1256     if (!se_nacl) {
1257         pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1258             loop_id);
1259         return NULL;
1260     }
1261 
1262     nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1263 
1264     if (!nacl->fc_port) {
1265         pr_err("Unable to locate struct fc_port\n");
1266         return NULL;
1267     }
1268 
1269     return nacl->fc_port;
1270 }
1271 
1272 /*
1273  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1274  */
1275 static void tcm_qla2xxx_set_sess_by_loop_id(
1276     struct tcm_qla2xxx_lport *lport,
1277     struct se_node_acl *new_se_nacl,
1278     struct tcm_qla2xxx_nacl *nacl,
1279     struct se_session *se_sess,
1280     struct fc_port *fc_port,
1281     uint16_t loop_id)
1282 {
1283     struct se_node_acl *saved_nacl;
1284     struct tcm_qla2xxx_fc_loopid *fc_loopid;
1285 
1286     pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1287 
1288     fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1289             lport->lport_loopid_map)[loop_id];
1290 
1291     saved_nacl = fc_loopid->se_nacl;
1292     if (!saved_nacl) {
1293         pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1294         fc_loopid->se_nacl = new_se_nacl;
1295         if (fc_port->se_sess != se_sess)
1296             fc_port->se_sess = se_sess;
1297         if (nacl->fc_port != fc_port)
1298             nacl->fc_port = fc_port;
1299         return;
1300     }
1301 
1302     if (nacl->fc_port) {
1303         if (new_se_nacl == NULL) {
1304             pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1305             fc_loopid->se_nacl = NULL;
1306             nacl->fc_port = NULL;
1307             return;
1308         }
1309 
1310         pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1311         fc_loopid->se_nacl = new_se_nacl;
1312         if (fc_port->se_sess != se_sess)
1313             fc_port->se_sess = se_sess;
1314         if (nacl->fc_port != fc_port)
1315             nacl->fc_port = fc_port;
1316         return;
1317     }
1318 
1319     if (new_se_nacl == NULL) {
1320         pr_debug("Clearing fc_loopid->se_nacl\n");
1321         fc_loopid->se_nacl = NULL;
1322         return;
1323     }
1324 
1325     pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1326     fc_loopid->se_nacl = new_se_nacl;
1327     if (fc_port->se_sess != se_sess)
1328         fc_port->se_sess = se_sess;
1329     if (nacl->fc_port != fc_port)
1330         nacl->fc_port = fc_port;
1331 
1332     pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1333         nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1334 }
1335 
1336 /*
1337  * Should always be called with qla_hw_data->tgt.sess_lock held.
1338  */
1339 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1340         struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1341 {
1342     struct se_session *se_sess = sess->se_sess;
1343 
1344     tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1345                      sess, port_id_to_be_id(sess->d_id));
1346     tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1347                 sess, sess->loop_id);
1348 }
1349 
1350 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1351 {
1352     struct qla_tgt *tgt = sess->tgt;
1353     struct qla_hw_data *ha = tgt->ha;
1354     scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1355     struct se_session *se_sess;
1356     struct tcm_qla2xxx_lport *lport;
1357 
1358     se_sess = sess->se_sess;
1359     if (!se_sess) {
1360         pr_err("struct fc_port->se_sess is NULL\n");
1361         dump_stack();
1362         return;
1363     }
1364 
1365     lport = vha->vha_tgt.target_lport_ptr;
1366     if (!lport) {
1367         pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1368         dump_stack();
1369         return;
1370     }
1371     target_wait_for_sess_cmds(se_sess);
1372 
1373     target_remove_session(se_sess);
1374 }
1375 
1376 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1377                   struct se_session *se_sess, void *p)
1378 {
1379     struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1380                 struct tcm_qla2xxx_tpg, se_tpg);
1381     struct tcm_qla2xxx_lport *lport = tpg->lport;
1382     struct qla_hw_data *ha = lport->qla_vha->hw;
1383     struct se_node_acl *se_nacl = se_sess->se_node_acl;
1384     struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1385                 struct tcm_qla2xxx_nacl, se_node_acl);
1386     struct fc_port *qlat_sess = p;
1387     uint16_t loop_id = qlat_sess->loop_id;
1388     unsigned long flags;
1389 
1390     /*
1391      * And now setup se_nacl and session pointers into HW lport internal
1392      * mappings for fabric S_ID and LOOP_ID.
1393      */
1394     spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1395     tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1396                      port_id_to_be_id(qlat_sess->d_id));
1397     tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1398                     se_sess, qlat_sess, loop_id);
1399     spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1400 
1401     return 0;
1402 }
1403 
1404 /*
1405  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1406  * to locate struct se_node_acl
1407  */
1408 static int tcm_qla2xxx_check_initiator_node_acl(
1409     scsi_qla_host_t *vha,
1410     unsigned char *fc_wwpn,
1411     struct fc_port *qlat_sess)
1412 {
1413     struct qla_hw_data *ha = vha->hw;
1414     struct tcm_qla2xxx_lport *lport;
1415     struct tcm_qla2xxx_tpg *tpg;
1416     struct se_session *se_sess;
1417     unsigned char port_name[36];
1418     int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1419                TCM_QLA2XXX_DEFAULT_TAGS;
1420 
1421     lport = vha->vha_tgt.target_lport_ptr;
1422     if (!lport) {
1423         pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1424         dump_stack();
1425         return -EINVAL;
1426     }
1427     /*
1428      * Locate the TPG=1 reference..
1429      */
1430     tpg = lport->tpg_1;
1431     if (!tpg) {
1432         pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1433         return -EINVAL;
1434     }
1435     /*
1436      * Format the FCP Initiator port_name into colon seperated values to
1437      * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1438      */
1439     memset(&port_name, 0, 36);
1440     snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1441     /*
1442      * Locate our struct se_node_acl either from an explict NodeACL created
1443      * via ConfigFS, or via running in TPG demo mode.
1444      */
1445     se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1446                        sizeof(struct qla_tgt_cmd),
1447                        TARGET_PROT_ALL, port_name,
1448                        qlat_sess, tcm_qla2xxx_session_cb);
1449     if (IS_ERR(se_sess))
1450         return PTR_ERR(se_sess);
1451 
1452     return 0;
1453 }
1454 
1455 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1456                     uint16_t loop_id, bool conf_compl_supported)
1457 {
1458     struct qla_tgt *tgt = sess->tgt;
1459     struct qla_hw_data *ha = tgt->ha;
1460     scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1461     struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1462     struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1463     struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1464             struct tcm_qla2xxx_nacl, se_node_acl);
1465     u32 key;
1466 
1467 
1468     if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1469         pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1470             sess, sess->port_name,
1471             sess->loop_id, loop_id, sess->d_id.b.domain,
1472             sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1473             s_id.b.area, s_id.b.al_pa);
1474 
1475     if (sess->loop_id != loop_id) {
1476         /*
1477          * Because we can shuffle loop IDs around and we
1478          * update different sessions non-atomically, we might
1479          * have overwritten this session's old loop ID
1480          * already, and we might end up overwriting some other
1481          * session that will be updated later.  So we have to
1482          * be extra careful and we can't warn about those things...
1483          */
1484         if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1485             lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1486 
1487         lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1488 
1489         sess->loop_id = loop_id;
1490     }
1491 
1492     if (sess->d_id.b24 != s_id.b24) {
1493         key = (((u32) sess->d_id.b.domain << 16) |
1494                ((u32) sess->d_id.b.area   <<  8) |
1495                ((u32) sess->d_id.b.al_pa));
1496 
1497         if (btree_lookup32(&lport->lport_fcport_map, key))
1498             WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1499                 se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1500                 sess->d_id.b.domain, sess->d_id.b.area,
1501                 sess->d_id.b.al_pa);
1502         else
1503             WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1504                  sess->d_id.b.domain, sess->d_id.b.area,
1505                  sess->d_id.b.al_pa);
1506 
1507         key = (((u32) s_id.b.domain << 16) |
1508                ((u32) s_id.b.area   <<  8) |
1509                ((u32) s_id.b.al_pa));
1510 
1511         if (btree_lookup32(&lport->lport_fcport_map, key)) {
1512             WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1513                  s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1514             btree_update32(&lport->lport_fcport_map, key, se_nacl);
1515         } else {
1516             btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1517                 GFP_ATOMIC);
1518         }
1519 
1520         sess->d_id = s_id;
1521         nacl->nport_id = key;
1522     }
1523 
1524     sess->conf_compl_supported = conf_compl_supported;
1525 
1526 }
1527 
1528 /*
1529  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1530  */
1531 static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1532     .find_cmd_by_tag    = tcm_qla2xxx_find_cmd_by_tag,
1533     .handle_cmd     = tcm_qla2xxx_handle_cmd,
1534     .handle_data        = tcm_qla2xxx_handle_data,
1535     .handle_tmr     = tcm_qla2xxx_handle_tmr,
1536     .get_cmd        = tcm_qla2xxx_get_cmd,
1537     .rel_cmd        = tcm_qla2xxx_rel_cmd,
1538     .free_cmd       = tcm_qla2xxx_free_cmd,
1539     .free_mcmd      = tcm_qla2xxx_free_mcmd,
1540     .free_session       = tcm_qla2xxx_free_session,
1541     .update_sess        = tcm_qla2xxx_update_sess,
1542     .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1543     .find_sess_by_s_id  = tcm_qla2xxx_find_sess_by_s_id,
1544     .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1545     .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1546     .put_sess       = tcm_qla2xxx_put_sess,
1547     .shutdown_sess      = tcm_qla2xxx_shutdown_sess,
1548     .get_dif_tags       = tcm_qla2xxx_dif_tags,
1549     .chk_dif_tags       = tcm_qla2xxx_chk_dif_tags,
1550 };
1551 
1552 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1553 {
1554     int rc;
1555 
1556     rc = btree_init32(&lport->lport_fcport_map);
1557     if (rc) {
1558         pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1559         return rc;
1560     }
1561 
1562     lport->lport_loopid_map =
1563         vzalloc(array_size(65536,
1564                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1565     if (!lport->lport_loopid_map) {
1566         pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1567             sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1568         btree_destroy32(&lport->lport_fcport_map);
1569         return -ENOMEM;
1570     }
1571     pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1572            sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1573     return 0;
1574 }
1575 
1576 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1577                      void *target_lport_ptr,
1578                      u64 npiv_wwpn, u64 npiv_wwnn)
1579 {
1580     struct qla_hw_data *ha = vha->hw;
1581     struct tcm_qla2xxx_lport *lport =
1582             (struct tcm_qla2xxx_lport *)target_lport_ptr;
1583     /*
1584      * Setup tgt_ops, local pointer to vha and target_lport_ptr
1585      */
1586     ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1587     vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1588     lport->qla_vha = vha;
1589 
1590     return 0;
1591 }
1592 
1593 static struct se_wwn *tcm_qla2xxx_make_lport(
1594     struct target_fabric_configfs *tf,
1595     struct config_group *group,
1596     const char *name)
1597 {
1598     struct tcm_qla2xxx_lport *lport;
1599     u64 wwpn;
1600     int ret = -ENODEV;
1601 
1602     if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1603         return ERR_PTR(-EINVAL);
1604 
1605     lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1606     if (!lport) {
1607         pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1608         return ERR_PTR(-ENOMEM);
1609     }
1610     lport->lport_wwpn = wwpn;
1611     tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1612                 wwpn);
1613     sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1614 
1615     ret = tcm_qla2xxx_init_lport(lport);
1616     if (ret != 0)
1617         goto out;
1618 
1619     ret = qlt_lport_register(lport, wwpn, 0, 0,
1620                  tcm_qla2xxx_lport_register_cb);
1621     if (ret != 0)
1622         goto out_lport;
1623 
1624     return &lport->lport_wwn;
1625 out_lport:
1626     vfree(lport->lport_loopid_map);
1627     btree_destroy32(&lport->lport_fcport_map);
1628 out:
1629     kfree(lport);
1630     return ERR_PTR(ret);
1631 }
1632 
1633 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1634 {
1635     struct tcm_qla2xxx_lport *lport = container_of(wwn,
1636             struct tcm_qla2xxx_lport, lport_wwn);
1637     struct scsi_qla_host *vha = lport->qla_vha;
1638     struct se_node_acl *node;
1639     u32 key = 0;
1640 
1641     /*
1642      * Call into qla2x_target.c LLD logic to complete the
1643      * shutdown of struct qla_tgt after the call to
1644      * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1645      */
1646     if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1647         qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1648 
1649     qlt_lport_deregister(vha);
1650 
1651     vfree(lport->lport_loopid_map);
1652     btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1653         btree_remove32(&lport->lport_fcport_map, key);
1654     btree_destroy32(&lport->lport_fcport_map);
1655     kfree(lport);
1656 }
1657 
1658 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1659                           void *target_lport_ptr,
1660                           u64 npiv_wwpn, u64 npiv_wwnn)
1661 {
1662     struct fc_vport *vport;
1663     struct Scsi_Host *sh = base_vha->host;
1664     struct scsi_qla_host *npiv_vha;
1665     struct tcm_qla2xxx_lport *lport =
1666             (struct tcm_qla2xxx_lport *)target_lport_ptr;
1667     struct tcm_qla2xxx_lport *base_lport =
1668             (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1669     struct fc_vport_identifiers vport_id;
1670 
1671     if (qla_ini_mode_enabled(base_vha)) {
1672         pr_err("qla2xxx base_vha not enabled for target mode\n");
1673         return -EPERM;
1674     }
1675 
1676     if (!base_lport || !base_lport->tpg_1 ||
1677         !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1678         pr_err("qla2xxx base_lport or tpg_1 not available\n");
1679         return -EPERM;
1680     }
1681 
1682     memset(&vport_id, 0, sizeof(vport_id));
1683     vport_id.port_name = npiv_wwpn;
1684     vport_id.node_name = npiv_wwnn;
1685     vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1686     vport_id.vport_type = FC_PORTTYPE_NPIV;
1687     vport_id.disable = false;
1688 
1689     vport = fc_vport_create(sh, 0, &vport_id);
1690     if (!vport) {
1691         pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1692         return -ENODEV;
1693     }
1694     /*
1695      * Setup local pointer to NPIV vhba + target_lport_ptr
1696      */
1697     npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1698     npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1699     lport->qla_vha = npiv_vha;
1700     scsi_host_get(npiv_vha->host);
1701     return 0;
1702 }
1703 
1704 
1705 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1706     struct target_fabric_configfs *tf,
1707     struct config_group *group,
1708     const char *name)
1709 {
1710     struct tcm_qla2xxx_lport *lport;
1711     u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1712     char *p, tmp[128];
1713     int ret;
1714 
1715     snprintf(tmp, 128, "%s", name);
1716 
1717     p = strchr(tmp, '@');
1718     if (!p) {
1719         pr_err("Unable to locate NPIV '@' separator\n");
1720         return ERR_PTR(-EINVAL);
1721     }
1722     *p++ = '\0';
1723 
1724     if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1725         return ERR_PTR(-EINVAL);
1726 
1727     if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1728                        &npiv_wwpn, &npiv_wwnn) < 0)
1729         return ERR_PTR(-EINVAL);
1730 
1731     lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1732     if (!lport) {
1733         pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1734         return ERR_PTR(-ENOMEM);
1735     }
1736     lport->lport_npiv_wwpn = npiv_wwpn;
1737     lport->lport_npiv_wwnn = npiv_wwnn;
1738     sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1739 
1740     ret = tcm_qla2xxx_init_lport(lport);
1741     if (ret != 0)
1742         goto out;
1743 
1744     ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1745                  tcm_qla2xxx_lport_register_npiv_cb);
1746     if (ret != 0)
1747         goto out_lport;
1748 
1749     return &lport->lport_wwn;
1750 out_lport:
1751     vfree(lport->lport_loopid_map);
1752     btree_destroy32(&lport->lport_fcport_map);
1753 out:
1754     kfree(lport);
1755     return ERR_PTR(ret);
1756 }
1757 
1758 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1759 {
1760     struct tcm_qla2xxx_lport *lport = container_of(wwn,
1761             struct tcm_qla2xxx_lport, lport_wwn);
1762     struct scsi_qla_host *npiv_vha = lport->qla_vha;
1763     struct qla_hw_data *ha = npiv_vha->hw;
1764     scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1765 
1766     scsi_host_put(npiv_vha->host);
1767     /*
1768      * Notify libfc that we want to release the vha->fc_vport
1769      */
1770     fc_vport_terminate(npiv_vha->fc_vport);
1771     scsi_host_put(base_vha->host);
1772     kfree(lport);
1773 }
1774 
1775 
1776 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1777         char *page)
1778 {
1779     return sprintf(page,
1780         "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1781         QLA2XXX_VERSION, utsname()->sysname,
1782         utsname()->machine, utsname()->release);
1783 }
1784 
1785 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1786 
1787 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1788     &tcm_qla2xxx_wwn_attr_version,
1789     NULL,
1790 };
1791 
1792 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1793     .module             = THIS_MODULE,
1794     .fabric_name            = "qla2xxx",
1795     .node_acl_size          = sizeof(struct tcm_qla2xxx_nacl),
1796     /*
1797      * XXX: Limit assumes single page per scatter-gather-list entry.
1798      * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1799      */
1800     .max_data_sg_nents      = 1200,
1801     .tpg_get_wwn            = tcm_qla2xxx_get_fabric_wwn,
1802     .tpg_get_tag            = tcm_qla2xxx_get_tag,
1803     .tpg_check_demo_mode        = tcm_qla2xxx_check_demo_mode,
1804     .tpg_check_demo_mode_cache  = tcm_qla2xxx_check_demo_mode_cache,
1805     .tpg_check_demo_mode_write_protect =
1806                     tcm_qla2xxx_check_demo_write_protect,
1807     .tpg_check_prod_mode_write_protect =
1808                     tcm_qla2xxx_check_prod_write_protect,
1809     .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only,
1810     .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1811     .tpg_get_inst_index     = tcm_qla2xxx_tpg_get_inst_index,
1812     .check_stop_free        = tcm_qla2xxx_check_stop_free,
1813     .release_cmd            = tcm_qla2xxx_release_cmd,
1814     .close_session          = tcm_qla2xxx_close_session,
1815     .sess_get_index         = tcm_qla2xxx_sess_get_index,
1816     .sess_get_initiator_sid     = NULL,
1817     .write_pending          = tcm_qla2xxx_write_pending,
1818     .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1819     .get_cmd_state          = tcm_qla2xxx_get_cmd_state,
1820     .queue_data_in          = tcm_qla2xxx_queue_data_in,
1821     .queue_status           = tcm_qla2xxx_queue_status,
1822     .queue_tm_rsp           = tcm_qla2xxx_queue_tm_rsp,
1823     .aborted_task           = tcm_qla2xxx_aborted_task,
1824     /*
1825      * Setup function pointers for generic logic in
1826      * target_core_fabric_configfs.c
1827      */
1828     .fabric_make_wwn        = tcm_qla2xxx_make_lport,
1829     .fabric_drop_wwn        = tcm_qla2xxx_drop_lport,
1830     .fabric_make_tpg        = tcm_qla2xxx_make_tpg,
1831     .fabric_enable_tpg      = tcm_qla2xxx_enable_tpg,
1832     .fabric_drop_tpg        = tcm_qla2xxx_drop_tpg,
1833     .fabric_init_nodeacl        = tcm_qla2xxx_init_nodeacl,
1834 
1835     .tfc_wwn_attrs          = tcm_qla2xxx_wwn_attrs,
1836     .tfc_tpg_base_attrs     = tcm_qla2xxx_tpg_attrs,
1837     .tfc_tpg_attrib_attrs       = tcm_qla2xxx_tpg_attrib_attrs,
1838 };
1839 
1840 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1841     .module             = THIS_MODULE,
1842     .fabric_name            = "qla2xxx_npiv",
1843     .node_acl_size          = sizeof(struct tcm_qla2xxx_nacl),
1844     .tpg_get_wwn            = tcm_qla2xxx_get_fabric_wwn,
1845     .tpg_get_tag            = tcm_qla2xxx_get_tag,
1846     .tpg_check_demo_mode        = tcm_qla2xxx_check_demo_mode,
1847     .tpg_check_demo_mode_cache  = tcm_qla2xxx_check_demo_mode_cache,
1848     .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1849     .tpg_check_prod_mode_write_protect =
1850         tcm_qla2xxx_check_prod_write_protect,
1851     .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1852     .tpg_get_inst_index     = tcm_qla2xxx_tpg_get_inst_index,
1853     .check_stop_free                = tcm_qla2xxx_check_stop_free,
1854     .release_cmd            = tcm_qla2xxx_release_cmd,
1855     .close_session          = tcm_qla2xxx_close_session,
1856     .sess_get_index         = tcm_qla2xxx_sess_get_index,
1857     .sess_get_initiator_sid     = NULL,
1858     .write_pending          = tcm_qla2xxx_write_pending,
1859     .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1860     .get_cmd_state          = tcm_qla2xxx_get_cmd_state,
1861     .queue_data_in          = tcm_qla2xxx_queue_data_in,
1862     .queue_status           = tcm_qla2xxx_queue_status,
1863     .queue_tm_rsp           = tcm_qla2xxx_queue_tm_rsp,
1864     .aborted_task           = tcm_qla2xxx_aborted_task,
1865     /*
1866      * Setup function pointers for generic logic in
1867      * target_core_fabric_configfs.c
1868      */
1869     .fabric_make_wwn        = tcm_qla2xxx_npiv_make_lport,
1870     .fabric_drop_wwn        = tcm_qla2xxx_npiv_drop_lport,
1871     .fabric_make_tpg        = tcm_qla2xxx_npiv_make_tpg,
1872     .fabric_enable_tpg      = tcm_qla2xxx_npiv_enable_tpg,
1873     .fabric_drop_tpg        = tcm_qla2xxx_drop_tpg,
1874     .fabric_init_nodeacl        = tcm_qla2xxx_init_nodeacl,
1875 
1876     .tfc_wwn_attrs          = tcm_qla2xxx_wwn_attrs,
1877 };
1878 
1879 static int tcm_qla2xxx_register_configfs(void)
1880 {
1881     int ret;
1882 
1883     pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1884         QLA2XXX_VERSION, utsname()->sysname,
1885         utsname()->machine, utsname()->release);
1886 
1887     ret = target_register_template(&tcm_qla2xxx_ops);
1888     if (ret)
1889         return ret;
1890 
1891     ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1892     if (ret)
1893         goto out_fabric;
1894 
1895     tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1896                         WQ_MEM_RECLAIM, 0);
1897     if (!tcm_qla2xxx_free_wq) {
1898         ret = -ENOMEM;
1899         goto out_fabric_npiv;
1900     }
1901 
1902     return 0;
1903 
1904 out_fabric_npiv:
1905     target_unregister_template(&tcm_qla2xxx_npiv_ops);
1906 out_fabric:
1907     target_unregister_template(&tcm_qla2xxx_ops);
1908     return ret;
1909 }
1910 
1911 static void tcm_qla2xxx_deregister_configfs(void)
1912 {
1913     destroy_workqueue(tcm_qla2xxx_free_wq);
1914 
1915     target_unregister_template(&tcm_qla2xxx_ops);
1916     target_unregister_template(&tcm_qla2xxx_npiv_ops);
1917 }
1918 
1919 static int __init tcm_qla2xxx_init(void)
1920 {
1921     int ret;
1922 
1923     BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1924     BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1925     BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1926     BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1927     BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1928     BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1929     BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1930     BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1931     BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1932     BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1933     BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1934     BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1935     BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1936     BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1937 
1938     ret = tcm_qla2xxx_register_configfs();
1939     if (ret < 0)
1940         return ret;
1941 
1942     return 0;
1943 }
1944 
1945 static void __exit tcm_qla2xxx_exit(void)
1946 {
1947     tcm_qla2xxx_deregister_configfs();
1948 }
1949 
1950 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1951 MODULE_LICENSE("GPL");
1952 module_init(tcm_qla2xxx_init);
1953 module_exit(tcm_qla2xxx_exit);
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