diff options
Diffstat (limited to 'drivers/scsi/qla2xxx/tcm_qla2xxx.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/tcm_qla2xxx.c | 1938 |
1 files changed, 1938 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c new file mode 100644 index 0000000000..68a0e6a2fb --- /dev/null +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -0,0 +1,1938 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/******************************************************************************* + * This file contains tcm implementation using v4 configfs fabric infrastructure + * for QLogic target mode HBAs + * + * (c) Copyright 2010-2013 Datera, Inc. + * + * Author: Nicholas A. Bellinger <nab@daterainc.com> + * + * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from + * the TCM_FC / Open-FCoE.org fabric module. + * + * Copyright (c) 2010 Cisco Systems, Inc + * + ****************************************************************************/ + + +#include <linux/module.h> +#include <linux/utsname.h> +#include <linux/vmalloc.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/configfs.h> +#include <linux/ctype.h> +#include <asm/unaligned.h> +#include <scsi/scsi_host.h> +#include <target/target_core_base.h> +#include <target/target_core_fabric.h> + +#include "qla_def.h" +#include "qla_target.h" +#include "tcm_qla2xxx.h" + +static struct workqueue_struct *tcm_qla2xxx_free_wq; + +/* + * Parse WWN. + * If strict, we require lower-case hex and colon separators to be sure + * the name is the same as what would be generated by ft_format_wwn() + * so the name and wwn are mapped one-to-one. + */ +static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict) +{ + const char *cp; + char c; + u32 nibble; + u32 byte = 0; + u32 pos = 0; + u32 err; + + *wwn = 0; + for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) { + c = *cp; + if (c == '\n' && cp[1] == '\0') + continue; + if (strict && pos++ == 2 && byte++ < 7) { + pos = 0; + if (c == ':') + continue; + err = 1; + goto fail; + } + if (c == '\0') { + err = 2; + if (strict && byte != 8) + goto fail; + return cp - name; + } + err = 3; + if (isdigit(c)) + nibble = c - '0'; + else if (isxdigit(c) && (islower(c) || !strict)) + nibble = tolower(c) - 'a' + 10; + else + goto fail; + *wwn = (*wwn << 4) | nibble; + } + err = 4; +fail: + pr_debug("err %u len %zu pos %u byte %u\n", + err, cp - name, pos, byte); + return -1; +} + +static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn) +{ + u8 b[8]; + + put_unaligned_be64(wwn, b); + return snprintf(buf, len, + "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", + b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); +} + +/* + * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn + */ +static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm) +{ + unsigned int i, j; + u8 wwn[8]; + + memset(wwn, 0, sizeof(wwn)); + + /* Validate and store the new name */ + for (i = 0, j = 0; i < 16; i++) { + int value; + + value = hex_to_bin(*ns++); + if (value >= 0) + j = (j << 4) | value; + else + return -EINVAL; + + if (i % 2) { + wwn[i/2] = j & 0xff; + j = 0; + } + } + + *nm = wwn_to_u64(wwn); + return 0; +} + +/* + * This parsing logic follows drivers/scsi/scsi_transport_fc.c: + * store_fc_host_vport_create() + */ +static int tcm_qla2xxx_npiv_parse_wwn( + const char *name, + size_t count, + u64 *wwpn, + u64 *wwnn) +{ + unsigned int cnt = count; + int rc; + + *wwpn = 0; + *wwnn = 0; + + /* count may include a LF at end of string */ + if (name[cnt-1] == '\n' || name[cnt-1] == 0) + cnt--; + + /* validate we have enough characters for WWPN */ + if ((cnt != (16+1+16)) || (name[16] != ':')) + return -EINVAL; + + rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn); + if (rc != 0) + return rc; + + rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn); + if (rc != 0) + return rc; + + return 0; +} + +static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + struct tcm_qla2xxx_lport *lport = tpg->lport; + + return lport->lport_naa_name; +} + +static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + return tpg->lport_tpgt; +} + +static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.generate_node_acls; +} + +static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.cache_dynamic_acls; +} + +static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.demo_mode_write_protect; +} + +static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.prod_mode_write_protect; +} + +static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.demo_mode_login_only; +} + +static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->tpg_attrib.fabric_prot_type; +} + +static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return tpg->lport_tpgt; +} + +static void tcm_qla2xxx_complete_mcmd(struct work_struct *work) +{ + struct qla_tgt_mgmt_cmd *mcmd = container_of(work, + struct qla_tgt_mgmt_cmd, free_work); + + transport_generic_free_cmd(&mcmd->se_cmd, 0); +} + +/* + * Called from qla_target_template->free_mcmd(), and will call + * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops + * release callback. qla_hw_data->hardware_lock is expected to be held + */ +static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) +{ + if (!mcmd) + return; + INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd); + queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work); +} + +static void tcm_qla2xxx_complete_free(struct work_struct *work) +{ + struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); + unsigned long flags; + + cmd->cmd_in_wq = 0; + + WARN_ON(cmd->trc_flags & TRC_CMD_FREE); + + /* To do: protect all tgt_counters manipulations with proper locking. */ + cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++; + cmd->trc_flags |= TRC_CMD_FREE; + cmd->cmd_sent_to_fw = 0; + + spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags); + list_del_init(&cmd->sess_cmd_list); + spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags); + + transport_generic_free_cmd(&cmd->se_cmd, 0); +} + +static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess) +{ + struct se_session *se_sess = sess->se_sess; + struct qla_tgt_cmd *cmd; + int tag, cpu; + + tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); + if (tag < 0) + return NULL; + + cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; + memset(cmd, 0, sizeof(struct qla_tgt_cmd)); + cmd->se_cmd.map_tag = tag; + cmd->se_cmd.map_cpu = cpu; + + return cmd; +} + +static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd) +{ + target_free_tag(cmd->sess->se_sess, &cmd->se_cmd); +} + +/* + * Called from qla_target_template->free_cmd(), and will call + * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops + * release callback. qla_hw_data->hardware_lock is expected to be held + */ +static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd) +{ + cmd->qpair->tgt_counters.core_qla_free_cmd++; + cmd->cmd_in_wq = 1; + + WARN_ON(cmd->trc_flags & TRC_CMD_DONE); + cmd->trc_flags |= TRC_CMD_DONE; + + INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free); + queue_work(tcm_qla2xxx_free_wq, &cmd->work); +} + +/* + * Called from struct target_core_fabric_ops->check_stop_free() context + */ +static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd; + + if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) { + cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); + cmd->trc_flags |= TRC_CMD_CHK_STOP; + } + + return target_put_sess_cmd(se_cmd); +} + +/* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying + * fabric descriptor @se_cmd command to release + */ +static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd; + + if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) { + struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd, + struct qla_tgt_mgmt_cmd, se_cmd); + qlt_free_mcmd(mcmd); + return; + } + cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); + + if (WARN_ON(cmd->cmd_sent_to_fw)) + return; + + qlt_free_cmd(cmd); +} + +static void tcm_qla2xxx_release_session(struct kref *kref) +{ + struct fc_port *sess = container_of(kref, + struct fc_port, sess_kref); + + qlt_unreg_sess(sess); +} + +static void tcm_qla2xxx_put_sess(struct fc_port *sess) +{ + if (!sess) + return; + + kref_put(&sess->sess_kref, tcm_qla2xxx_release_session); +} + +static void tcm_qla2xxx_close_session(struct se_session *se_sess) +{ + struct fc_port *sess = se_sess->fabric_sess_ptr; + + BUG_ON(!sess); + + target_stop_session(se_sess); + + sess->explicit_logout = 1; + tcm_qla2xxx_put_sess(sess); +} + +static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd = container_of(se_cmd, + struct qla_tgt_cmd, se_cmd); + + if (cmd->aborted) { + /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task + * can get ahead of this cmd. tcm_qla2xxx_aborted_task + * already kick start the free. + */ + pr_debug("write_pending aborted cmd[%p] refcount %d " + "transport_state %x, t_state %x, se_cmd_flags %x\n", + cmd, kref_read(&cmd->se_cmd.cmd_kref), + cmd->se_cmd.transport_state, + cmd->se_cmd.t_state, + cmd->se_cmd.se_cmd_flags); + transport_generic_request_failure(&cmd->se_cmd, + TCM_CHECK_CONDITION_ABORT_CMD); + return 0; + } + cmd->trc_flags |= TRC_XFR_RDY; + cmd->bufflen = se_cmd->data_length; + cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); + + cmd->sg_cnt = se_cmd->t_data_nents; + cmd->sg = se_cmd->t_data_sg; + + cmd->prot_sg_cnt = se_cmd->t_prot_nents; + cmd->prot_sg = se_cmd->t_prot_sg; + cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size; + se_cmd->pi_err = 0; + + /* + * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup + * the SGL mappings into PCIe memory for incoming FCP WRITE data. + */ + return qlt_rdy_to_xfer(cmd); +} + +static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd) +{ + if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { + struct qla_tgt_cmd *cmd = container_of(se_cmd, + struct qla_tgt_cmd, se_cmd); + return cmd->state; + } + + return 0; +} + +/* + * Called from process context in qla_target.c:qlt_do_work() code + */ +static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd, + unsigned char *cdb, uint32_t data_length, int fcp_task_attr, + int data_dir, int bidi) +{ + struct se_cmd *se_cmd = &cmd->se_cmd; + struct se_session *se_sess; + struct fc_port *sess; +#ifdef CONFIG_TCM_QLA2XXX_DEBUG + struct se_portal_group *se_tpg; + struct tcm_qla2xxx_tpg *tpg; +#endif + int rc, target_flags = TARGET_SCF_ACK_KREF; + unsigned long flags; + + if (bidi) + target_flags |= TARGET_SCF_BIDI_OP; + + if (se_cmd->cpuid != WORK_CPU_UNBOUND) + target_flags |= TARGET_SCF_USE_CPUID; + + sess = cmd->sess; + if (!sess) { + pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n"); + return -EINVAL; + } + + se_sess = sess->se_sess; + if (!se_sess) { + pr_err("Unable to locate active struct se_session\n"); + return -EINVAL; + } + +#ifdef CONFIG_TCM_QLA2XXX_DEBUG + se_tpg = se_sess->se_tpg; + tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg); + if (unlikely(tpg->tpg_attrib.jam_host)) { + /* return, and dont run target_submit_cmd,discarding command */ + return 0; + } +#endif + cmd->qpair->tgt_counters.qla_core_sbt_cmd++; + + spin_lock_irqsave(&sess->sess_cmd_lock, flags); + list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list); + spin_unlock_irqrestore(&sess->sess_cmd_lock, flags); + + rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0], + cmd->unpacked_lun, data_length, fcp_task_attr, + data_dir, target_flags); + if (rc) + return rc; + + if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0, + GFP_KERNEL)) + return 0; + + target_submit(se_cmd); + return 0; +} + +static void tcm_qla2xxx_handle_data_work(struct work_struct *work) +{ + struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); + + /* + * Ensure that the complete FCP WRITE payload has been received. + * Otherwise return an exception via CHECK_CONDITION status. + */ + cmd->cmd_in_wq = 0; + cmd->cmd_sent_to_fw = 0; + if (cmd->aborted) { + transport_generic_request_failure(&cmd->se_cmd, + TCM_CHECK_CONDITION_ABORT_CMD); + return; + } + + cmd->qpair->tgt_counters.qla_core_ret_ctio++; + if (!cmd->write_data_transferred) { + switch (cmd->dif_err_code) { + case DIF_ERR_GRD: + cmd->se_cmd.pi_err = + TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; + break; + case DIF_ERR_REF: + cmd->se_cmd.pi_err = + TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; + break; + case DIF_ERR_APP: + cmd->se_cmd.pi_err = + TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; + break; + case DIF_ERR_NONE: + default: + break; + } + + if (cmd->se_cmd.pi_err) + transport_generic_request_failure(&cmd->se_cmd, + cmd->se_cmd.pi_err); + else + transport_generic_request_failure(&cmd->se_cmd, + TCM_CHECK_CONDITION_ABORT_CMD); + + return; + } + + return target_execute_cmd(&cmd->se_cmd); +} + +/* + * Called from qla_target.c:qlt_do_ctio_completion() + */ +static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd) +{ + cmd->trc_flags |= TRC_DATA_IN; + cmd->cmd_in_wq = 1; + INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work); + queue_work(tcm_qla2xxx_free_wq, &cmd->work); +} + +static int tcm_qla2xxx_chk_dif_tags(uint32_t tag) +{ + return 0; +} + +static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd, + uint16_t *pfw_prot_opts) +{ + struct se_cmd *se_cmd = &cmd->se_cmd; + + if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD)) + *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK; + + if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG)) + *pfw_prot_opts |= PO_DIS_APP_TAG_VALD; + + return 0; +} + +/* + * Called from qla_target.c:qlt_issue_task_mgmt() + */ +static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun, + uint16_t tmr_func, uint32_t tag) +{ + struct fc_port *sess = mcmd->sess; + struct se_cmd *se_cmd = &mcmd->se_cmd; + int transl_tmr_func = 0; + + switch (tmr_func) { + case QLA_TGT_ABTS: + pr_debug("%ld: ABTS received\n", sess->vha->host_no); + transl_tmr_func = TMR_ABORT_TASK; + break; + case QLA_TGT_2G_ABORT_TASK: + pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no); + transl_tmr_func = TMR_ABORT_TASK; + break; + case QLA_TGT_CLEAR_ACA: + pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no); + transl_tmr_func = TMR_CLEAR_ACA; + break; + case QLA_TGT_TARGET_RESET: + pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no); + transl_tmr_func = TMR_TARGET_WARM_RESET; + break; + case QLA_TGT_LUN_RESET: + pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no); + transl_tmr_func = TMR_LUN_RESET; + break; + case QLA_TGT_CLEAR_TS: + pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no); + transl_tmr_func = TMR_CLEAR_TASK_SET; + break; + case QLA_TGT_ABORT_TS: + pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no); + transl_tmr_func = TMR_ABORT_TASK_SET; + break; + default: + pr_debug("%ld: Unknown task mgmt fn 0x%x\n", + sess->vha->host_no, tmr_func); + return -ENOSYS; + } + + return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd, + transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF); +} + +static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess, + uint64_t tag) +{ + struct qla_tgt_cmd *cmd; + unsigned long flags; + + if (!sess->se_sess) + return NULL; + + spin_lock_irqsave(&sess->sess_cmd_lock, flags); + list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) { + if (cmd->se_cmd.tag == tag) + goto done; + } + cmd = NULL; +done: + spin_unlock_irqrestore(&sess->sess_cmd_lock, flags); + + return cmd; +} + +static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd = container_of(se_cmd, + struct qla_tgt_cmd, se_cmd); + + if (cmd->aborted) { + /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task + * can get ahead of this cmd. tcm_qla2xxx_aborted_task + * already kick start the free. + */ + pr_debug("queue_data_in aborted cmd[%p] refcount %d " + "transport_state %x, t_state %x, se_cmd_flags %x\n", + cmd, kref_read(&cmd->se_cmd.cmd_kref), + cmd->se_cmd.transport_state, + cmd->se_cmd.t_state, + cmd->se_cmd.se_cmd_flags); + return 0; + } + + cmd->trc_flags |= TRC_XMIT_DATA; + cmd->bufflen = se_cmd->data_length; + cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); + + cmd->sg_cnt = se_cmd->t_data_nents; + cmd->sg = se_cmd->t_data_sg; + cmd->offset = 0; + + cmd->prot_sg_cnt = se_cmd->t_prot_nents; + cmd->prot_sg = se_cmd->t_prot_sg; + cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size; + se_cmd->pi_err = 0; + + /* + * Now queue completed DATA_IN the qla2xxx LLD and response ring + */ + return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS, + se_cmd->scsi_status); +} + +static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd = container_of(se_cmd, + struct qla_tgt_cmd, se_cmd); + int xmit_type = QLA_TGT_XMIT_STATUS; + + if (cmd->aborted) { + /* + * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task + * can get ahead of this cmd. tcm_qla2xxx_aborted_task + * already kick start the free. + */ + pr_debug( + "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n", + cmd, kref_read(&cmd->se_cmd.cmd_kref), + cmd->se_cmd.transport_state, cmd->se_cmd.t_state, + cmd->se_cmd.se_cmd_flags); + return 0; + } + cmd->bufflen = se_cmd->data_length; + cmd->sg = NULL; + cmd->sg_cnt = 0; + cmd->offset = 0; + cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); + cmd->trc_flags |= TRC_XMIT_STATUS; + + if (se_cmd->data_direction == DMA_FROM_DEVICE) { + /* + * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen + * for qla_tgt_xmit_response LLD code + */ + if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { + se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT; + se_cmd->residual_count = 0; + } + se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; + se_cmd->residual_count += se_cmd->data_length; + + cmd->bufflen = 0; + } + /* + * Now queue status response to qla2xxx LLD code and response ring + */ + return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); +} + +static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd) +{ + struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; + struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd, + struct qla_tgt_mgmt_cmd, se_cmd); + + pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n", + mcmd, se_tmr->function, se_tmr->response); + /* + * Do translation between TCM TM response codes and + * QLA2xxx FC TM response codes. + */ + switch (se_tmr->response) { + case TMR_FUNCTION_COMPLETE: + mcmd->fc_tm_rsp = FC_TM_SUCCESS; + break; + case TMR_TASK_DOES_NOT_EXIST: + mcmd->fc_tm_rsp = FC_TM_BAD_CMD; + break; + case TMR_FUNCTION_REJECTED: + mcmd->fc_tm_rsp = FC_TM_REJECT; + break; + case TMR_LUN_DOES_NOT_EXIST: + default: + mcmd->fc_tm_rsp = FC_TM_FAILED; + break; + } + /* + * Queue the TM response to QLA2xxx LLD to build a + * CTIO response packet. + */ + qlt_xmit_tm_rsp(mcmd); +} + +static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd) +{ + struct qla_tgt_cmd *cmd; + unsigned long flags; + + if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) + return; + + cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); + + spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags); + list_del_init(&cmd->sess_cmd_list); + spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags); + + qlt_abort_cmd(cmd); +} + +static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *, + struct tcm_qla2xxx_nacl *, struct fc_port *); +/* + * Expected to be called with struct qla_hw_data->tgt.sess_lock held + */ +static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess) +{ + struct se_node_acl *se_nacl = sess->se_sess->se_node_acl; + struct se_portal_group *se_tpg = se_nacl->se_tpg; + struct se_wwn *se_wwn = se_tpg->se_tpg_wwn; + struct tcm_qla2xxx_lport *lport = container_of(se_wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl, + struct tcm_qla2xxx_nacl, se_node_acl); + void *node; + + pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id); + + node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id); + if (WARN_ON(node && (node != se_nacl))) { + /* + * The nacl no longer matches what we think it should be. + * Most likely a new dynamic acl has been added while + * someone dropped the hardware lock. It clearly is a + * bug elsewhere, but this bit can't make things worse. + */ + btree_insert32(&lport->lport_fcport_map, nacl->nport_id, + node, GFP_ATOMIC); + } + + pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n", + se_nacl, nacl->nport_wwnn, nacl->nport_id); + /* + * Now clear the se_nacl and session pointers from our HW lport lookup + * table mapping for this initiator's fabric S_ID and LOOP_ID entries. + * + * This is done ahead of callbacks into tcm_qla2xxx_free_session() -> + * target_wait_for_sess_cmds() before the session waits for outstanding + * I/O to complete, to avoid a race between session shutdown execution + * and incoming ATIOs or TMRs picking up a stale se_node_act reference. + */ + tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess); +} + +static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess) +{ + target_stop_session(sess->se_sess); +} + +static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl, + const char *name) +{ + struct tcm_qla2xxx_nacl *nacl = + container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); + u64 wwnn; + + if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0) + return -EINVAL; + + nacl->nport_wwnn = wwnn; + tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn); + + return 0; +} + +/* Start items for tcm_qla2xxx_tpg_attrib_cit */ + +#define DEF_QLA_TPG_ATTRIB(name) \ + \ +static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show( \ + struct config_item *item, char *page) \ +{ \ + struct se_portal_group *se_tpg = attrib_to_tpg(item); \ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \ + struct tcm_qla2xxx_tpg, se_tpg); \ + \ + return sprintf(page, "%d\n", tpg->tpg_attrib.name); \ +} \ + \ +static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store( \ + struct config_item *item, const char *page, size_t count) \ +{ \ + struct se_portal_group *se_tpg = attrib_to_tpg(item); \ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \ + struct tcm_qla2xxx_tpg, se_tpg); \ + struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \ + unsigned long val; \ + int ret; \ + \ + ret = kstrtoul(page, 0, &val); \ + if (ret < 0) { \ + pr_err("kstrtoul() failed with" \ + " ret: %d\n", ret); \ + return -EINVAL; \ + } \ + \ + if ((val != 0) && (val != 1)) { \ + pr_err("Illegal boolean value %lu\n", val); \ + return -EINVAL; \ + } \ + \ + a->name = val; \ + \ + return count; \ +} \ +CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name) + +DEF_QLA_TPG_ATTRIB(generate_node_acls); +DEF_QLA_TPG_ATTRIB(cache_dynamic_acls); +DEF_QLA_TPG_ATTRIB(demo_mode_write_protect); +DEF_QLA_TPG_ATTRIB(prod_mode_write_protect); +DEF_QLA_TPG_ATTRIB(demo_mode_login_only); +#ifdef CONFIG_TCM_QLA2XXX_DEBUG +DEF_QLA_TPG_ATTRIB(jam_host); +#endif + +static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = { + &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls, + &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls, + &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect, + &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect, + &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only, +#ifdef CONFIG_TCM_QLA2XXX_DEBUG + &tcm_qla2xxx_tpg_attrib_attr_jam_host, +#endif + NULL, +}; + +/* End items for tcm_qla2xxx_tpg_attrib_cit */ + +static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg, + bool enable) +{ + struct se_wwn *se_wwn = se_tpg->se_tpg_wwn; + struct tcm_qla2xxx_lport *lport = container_of(se_wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct scsi_qla_host *vha = lport->qla_vha; + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + if (enable) { + if (atomic_read(&tpg->lport_tpg_enabled)) + return -EEXIST; + + atomic_set(&tpg->lport_tpg_enabled, 1); + qlt_enable_vha(vha); + } else { + if (!atomic_read(&tpg->lport_tpg_enabled)) + return 0; + + atomic_set(&tpg->lport_tpg_enabled, 0); + qlt_stop_phase1(vha->vha_tgt.qla_tgt); + qlt_stop_phase2(vha->vha_tgt.qla_tgt); + } + + return 0; +} + +static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item, + char *page) +{ + return target_show_dynamic_sessions(to_tpg(item), page); +} + +static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item, + const char *page, size_t count) +{ + struct se_portal_group *se_tpg = to_tpg(item); + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + unsigned long val; + int ret = kstrtoul(page, 0, &val); + + if (ret) { + pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret); + return ret; + } + if (val != 0 && val != 1 && val != 3) { + pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val); + return -EINVAL; + } + tpg->tpg_attrib.fabric_prot_type = val; + + return count; +} + +static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item, + char *page) +{ + struct se_portal_group *se_tpg = to_tpg(item); + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type); +} + +CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions); +CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type); + +static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = { + &tcm_qla2xxx_tpg_attr_dynamic_sessions, + &tcm_qla2xxx_tpg_attr_fabric_prot_type, + NULL, +}; + +static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn, + const char *name) +{ + struct tcm_qla2xxx_lport *lport = container_of(wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct tcm_qla2xxx_tpg *tpg; + unsigned long tpgt; + int ret; + + if (strstr(name, "tpgt_") != name) + return ERR_PTR(-EINVAL); + if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX) + return ERR_PTR(-EINVAL); + + if ((tpgt != 1)) { + pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n"); + return ERR_PTR(-ENOSYS); + } + + tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL); + if (!tpg) { + pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n"); + return ERR_PTR(-ENOMEM); + } + tpg->lport = lport; + tpg->lport_tpgt = tpgt; + /* + * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic + * NodeACLs + */ + tpg->tpg_attrib.generate_node_acls = 1; + tpg->tpg_attrib.demo_mode_write_protect = 1; + tpg->tpg_attrib.cache_dynamic_acls = 1; + tpg->tpg_attrib.demo_mode_login_only = 1; + tpg->tpg_attrib.jam_host = 0; + + ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP); + if (ret < 0) { + kfree(tpg); + return NULL; + } + + lport->tpg_1 = tpg; + + return &tpg->se_tpg; +} + +static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + struct tcm_qla2xxx_lport *lport = tpg->lport; + struct scsi_qla_host *vha = lport->qla_vha; + /* + * Call into qla2x_target.c LLD logic to shutdown the active + * FC Nexuses and disable target mode operation for this qla_hw_data + */ + if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop) + qlt_stop_phase1(vha->vha_tgt.qla_tgt); + + core_tpg_deregister(se_tpg); + /* + * Clear local TPG=1 pointer for non NPIV mode. + */ + lport->tpg_1 = NULL; + kfree(tpg); +} + +static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg, + bool enable) +{ + struct se_wwn *se_wwn = se_tpg->se_tpg_wwn; + struct tcm_qla2xxx_lport *lport = container_of(se_wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct scsi_qla_host *vha = lport->qla_vha; + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + + if (enable) { + if (atomic_read(&tpg->lport_tpg_enabled)) + return -EEXIST; + + atomic_set(&tpg->lport_tpg_enabled, 1); + qlt_enable_vha(vha); + } else { + if (!atomic_read(&tpg->lport_tpg_enabled)) + return 0; + + atomic_set(&tpg->lport_tpg_enabled, 0); + qlt_stop_phase1(vha->vha_tgt.qla_tgt); + qlt_stop_phase2(vha->vha_tgt.qla_tgt); + } + + return 0; +} + +static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn, + const char *name) +{ + struct tcm_qla2xxx_lport *lport = container_of(wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct tcm_qla2xxx_tpg *tpg; + unsigned long tpgt; + int ret; + + if (strstr(name, "tpgt_") != name) + return ERR_PTR(-EINVAL); + if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX) + return ERR_PTR(-EINVAL); + + tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL); + if (!tpg) { + pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n"); + return ERR_PTR(-ENOMEM); + } + tpg->lport = lport; + tpg->lport_tpgt = tpgt; + + /* + * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic + * NodeACLs + */ + tpg->tpg_attrib.generate_node_acls = 1; + tpg->tpg_attrib.demo_mode_write_protect = 1; + tpg->tpg_attrib.cache_dynamic_acls = 1; + tpg->tpg_attrib.demo_mode_login_only = 1; + + ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP); + if (ret < 0) { + kfree(tpg); + return NULL; + } + lport->tpg_1 = tpg; + return &tpg->se_tpg; +} + +/* + * Expected to be called with struct qla_hw_data->tgt.sess_lock held + */ +static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha, + const be_id_t s_id) +{ + struct tcm_qla2xxx_lport *lport; + struct se_node_acl *se_nacl; + struct tcm_qla2xxx_nacl *nacl; + u32 key; + + lport = vha->vha_tgt.target_lport_ptr; + if (!lport) { + pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); + dump_stack(); + return NULL; + } + + key = sid_to_key(s_id); + pr_debug("find_sess_by_s_id: 0x%06x\n", key); + + se_nacl = btree_lookup32(&lport->lport_fcport_map, key); + if (!se_nacl) { + pr_debug("Unable to locate s_id: 0x%06x\n", key); + return NULL; + } + pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n", + se_nacl, se_nacl->initiatorname); + + nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); + if (!nacl->fc_port) { + pr_err("Unable to locate struct fc_port\n"); + return NULL; + } + + return nacl->fc_port; +} + +/* + * Expected to be called with struct qla_hw_data->tgt.sess_lock held + */ +static void tcm_qla2xxx_set_sess_by_s_id( + struct tcm_qla2xxx_lport *lport, + struct se_node_acl *new_se_nacl, + struct tcm_qla2xxx_nacl *nacl, + struct se_session *se_sess, + struct fc_port *fc_port, + be_id_t s_id) +{ + u32 key; + void *slot; + int rc; + + key = sid_to_key(s_id); + pr_debug("set_sess_by_s_id: %06x\n", key); + + slot = btree_lookup32(&lport->lport_fcport_map, key); + if (!slot) { + if (new_se_nacl) { + pr_debug("Setting up new fc_port entry to new_se_nacl\n"); + nacl->nport_id = key; + rc = btree_insert32(&lport->lport_fcport_map, key, + new_se_nacl, GFP_ATOMIC); + if (rc) + printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n", + (int)key); + } else { + pr_debug("Wiping nonexisting fc_port entry\n"); + } + + fc_port->se_sess = se_sess; + nacl->fc_port = fc_port; + return; + } + + if (nacl->fc_port) { + if (new_se_nacl == NULL) { + pr_debug("Clearing existing nacl->fc_port and fc_port entry\n"); + btree_remove32(&lport->lport_fcport_map, key); + nacl->fc_port = NULL; + return; + } + pr_debug("Replacing existing nacl->fc_port and fc_port entry\n"); + btree_update32(&lport->lport_fcport_map, key, new_se_nacl); + fc_port->se_sess = se_sess; + nacl->fc_port = fc_port; + return; + } + + if (new_se_nacl == NULL) { + pr_debug("Clearing existing fc_port entry\n"); + btree_remove32(&lport->lport_fcport_map, key); + return; + } + + pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n"); + btree_update32(&lport->lport_fcport_map, key, new_se_nacl); + fc_port->se_sess = se_sess; + nacl->fc_port = fc_port; + + pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n", + nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname); +} + +/* + * Expected to be called with struct qla_hw_data->tgt.sess_lock held + */ +static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id( + scsi_qla_host_t *vha, + const uint16_t loop_id) +{ + struct tcm_qla2xxx_lport *lport; + struct se_node_acl *se_nacl; + struct tcm_qla2xxx_nacl *nacl; + struct tcm_qla2xxx_fc_loopid *fc_loopid; + + lport = vha->vha_tgt.target_lport_ptr; + if (!lport) { + pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); + dump_stack(); + return NULL; + } + + pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id); + + fc_loopid = lport->lport_loopid_map + loop_id; + se_nacl = fc_loopid->se_nacl; + if (!se_nacl) { + pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n", + loop_id); + return NULL; + } + + nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); + + if (!nacl->fc_port) { + pr_err("Unable to locate struct fc_port\n"); + return NULL; + } + + return nacl->fc_port; +} + +/* + * Expected to be called with struct qla_hw_data->tgt.sess_lock held + */ +static void tcm_qla2xxx_set_sess_by_loop_id( + struct tcm_qla2xxx_lport *lport, + struct se_node_acl *new_se_nacl, + struct tcm_qla2xxx_nacl *nacl, + struct se_session *se_sess, + struct fc_port *fc_port, + uint16_t loop_id) +{ + struct se_node_acl *saved_nacl; + struct tcm_qla2xxx_fc_loopid *fc_loopid; + + pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id); + + fc_loopid = &((struct tcm_qla2xxx_fc_loopid *) + lport->lport_loopid_map)[loop_id]; + + saved_nacl = fc_loopid->se_nacl; + if (!saved_nacl) { + pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n"); + fc_loopid->se_nacl = new_se_nacl; + if (fc_port->se_sess != se_sess) + fc_port->se_sess = se_sess; + if (nacl->fc_port != fc_port) + nacl->fc_port = fc_port; + return; + } + + if (nacl->fc_port) { + if (new_se_nacl == NULL) { + pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n"); + fc_loopid->se_nacl = NULL; + nacl->fc_port = NULL; + return; + } + + pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n"); + fc_loopid->se_nacl = new_se_nacl; + if (fc_port->se_sess != se_sess) + fc_port->se_sess = se_sess; + if (nacl->fc_port != fc_port) + nacl->fc_port = fc_port; + return; + } + + if (new_se_nacl == NULL) { + pr_debug("Clearing fc_loopid->se_nacl\n"); + fc_loopid->se_nacl = NULL; + return; + } + + pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n"); + fc_loopid->se_nacl = new_se_nacl; + if (fc_port->se_sess != se_sess) + fc_port->se_sess = se_sess; + if (nacl->fc_port != fc_port) + nacl->fc_port = fc_port; + + pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n", + nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname); +} + +/* + * Should always be called with qla_hw_data->tgt.sess_lock held. + */ +static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport, + struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess) +{ + struct se_session *se_sess = sess->se_sess; + + tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess, + sess, port_id_to_be_id(sess->d_id)); + tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess, + sess, sess->loop_id); +} + +static void tcm_qla2xxx_free_session(struct fc_port *sess) +{ + struct qla_tgt *tgt = sess->tgt; + struct qla_hw_data *ha = tgt->ha; + scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); + struct se_session *se_sess; + struct tcm_qla2xxx_lport *lport; + + se_sess = sess->se_sess; + if (!se_sess) { + pr_err("struct fc_port->se_sess is NULL\n"); + dump_stack(); + return; + } + + lport = vha->vha_tgt.target_lport_ptr; + if (!lport) { + pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); + dump_stack(); + return; + } + target_wait_for_sess_cmds(se_sess); + + target_remove_session(se_sess); +} + +static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg, + struct se_session *se_sess, void *p) +{ + struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, + struct tcm_qla2xxx_tpg, se_tpg); + struct tcm_qla2xxx_lport *lport = tpg->lport; + struct qla_hw_data *ha = lport->qla_vha->hw; + struct se_node_acl *se_nacl = se_sess->se_node_acl; + struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl, + struct tcm_qla2xxx_nacl, se_node_acl); + struct fc_port *qlat_sess = p; + uint16_t loop_id = qlat_sess->loop_id; + unsigned long flags; + + /* + * And now setup se_nacl and session pointers into HW lport internal + * mappings for fabric S_ID and LOOP_ID. + */ + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess, + port_id_to_be_id(qlat_sess->d_id)); + tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, + se_sess, qlat_sess, loop_id); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + return 0; +} + +/* + * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl() + * to locate struct se_node_acl + */ +static int tcm_qla2xxx_check_initiator_node_acl( + scsi_qla_host_t *vha, + unsigned char *fc_wwpn, + struct fc_port *qlat_sess) +{ + struct qla_hw_data *ha = vha->hw; + struct tcm_qla2xxx_lport *lport; + struct tcm_qla2xxx_tpg *tpg; + struct se_session *se_sess; + unsigned char port_name[36]; + int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count : + TCM_QLA2XXX_DEFAULT_TAGS; + + lport = vha->vha_tgt.target_lport_ptr; + if (!lport) { + pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); + dump_stack(); + return -EINVAL; + } + /* + * Locate the TPG=1 reference.. + */ + tpg = lport->tpg_1; + if (!tpg) { + pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n"); + return -EINVAL; + } + /* + * Format the FCP Initiator port_name into colon seperated values to + * match the format by tcm_qla2xxx explict ConfigFS NodeACLs. + */ + memset(&port_name, 0, 36); + snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn); + /* + * Locate our struct se_node_acl either from an explict NodeACL created + * via ConfigFS, or via running in TPG demo mode. + */ + se_sess = target_setup_session(&tpg->se_tpg, num_tags, + sizeof(struct qla_tgt_cmd), + TARGET_PROT_ALL, port_name, + qlat_sess, tcm_qla2xxx_session_cb); + if (IS_ERR(se_sess)) + return PTR_ERR(se_sess); + + return 0; +} + +static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id, + uint16_t loop_id, bool conf_compl_supported) +{ + struct qla_tgt *tgt = sess->tgt; + struct qla_hw_data *ha = tgt->ha; + scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); + struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr; + struct se_node_acl *se_nacl = sess->se_sess->se_node_acl; + struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl, + struct tcm_qla2xxx_nacl, se_node_acl); + u32 key; + + + if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24) + pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n", + sess, sess->port_name, + sess->loop_id, loop_id, sess->d_id.b.domain, + sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain, + s_id.b.area, s_id.b.al_pa); + + if (sess->loop_id != loop_id) { + /* + * Because we can shuffle loop IDs around and we + * update different sessions non-atomically, we might + * have overwritten this session's old loop ID + * already, and we might end up overwriting some other + * session that will be updated later. So we have to + * be extra careful and we can't warn about those things... + */ + if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl) + lport->lport_loopid_map[sess->loop_id].se_nacl = NULL; + + lport->lport_loopid_map[loop_id].se_nacl = se_nacl; + + sess->loop_id = loop_id; + } + + if (sess->d_id.b24 != s_id.b24) { + key = (((u32) sess->d_id.b.domain << 16) | + ((u32) sess->d_id.b.area << 8) | + ((u32) sess->d_id.b.al_pa)); + + if (btree_lookup32(&lport->lport_fcport_map, key)) + WARN(btree_remove32(&lport->lport_fcport_map, key) != + se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n", + sess->d_id.b.domain, sess->d_id.b.area, + sess->d_id.b.al_pa); + else + WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n", + sess->d_id.b.domain, sess->d_id.b.area, + sess->d_id.b.al_pa); + + key = (((u32) s_id.b.domain << 16) | + ((u32) s_id.b.area << 8) | + ((u32) s_id.b.al_pa)); + + if (btree_lookup32(&lport->lport_fcport_map, key)) { + WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n", + s_id.b.domain, s_id.b.area, s_id.b.al_pa); + btree_update32(&lport->lport_fcport_map, key, se_nacl); + } else { + btree_insert32(&lport->lport_fcport_map, key, se_nacl, + GFP_ATOMIC); + } + + sess->d_id = s_id; + nacl->nport_id = key; + } + + sess->conf_compl_supported = conf_compl_supported; + +} + +/* + * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path. + */ +static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = { + .find_cmd_by_tag = tcm_qla2xxx_find_cmd_by_tag, + .handle_cmd = tcm_qla2xxx_handle_cmd, + .handle_data = tcm_qla2xxx_handle_data, + .handle_tmr = tcm_qla2xxx_handle_tmr, + .get_cmd = tcm_qla2xxx_get_cmd, + .rel_cmd = tcm_qla2xxx_rel_cmd, + .free_cmd = tcm_qla2xxx_free_cmd, + .free_mcmd = tcm_qla2xxx_free_mcmd, + .free_session = tcm_qla2xxx_free_session, + .update_sess = tcm_qla2xxx_update_sess, + .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl, + .find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id, + .find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id, + .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map, + .put_sess = tcm_qla2xxx_put_sess, + .shutdown_sess = tcm_qla2xxx_shutdown_sess, + .get_dif_tags = tcm_qla2xxx_dif_tags, + .chk_dif_tags = tcm_qla2xxx_chk_dif_tags, +}; + +static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport) +{ + int rc; + size_t map_sz; + + rc = btree_init32(&lport->lport_fcport_map); + if (rc) { + pr_err("Unable to initialize lport->lport_fcport_map btree\n"); + return rc; + } + + map_sz = array_size(65536, sizeof(struct tcm_qla2xxx_fc_loopid)); + + lport->lport_loopid_map = vzalloc(map_sz); + if (!lport->lport_loopid_map) { + pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n", map_sz); + btree_destroy32(&lport->lport_fcport_map); + return -ENOMEM; + } + pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n", map_sz); + return 0; +} + +static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha, + void *target_lport_ptr, + u64 npiv_wwpn, u64 npiv_wwnn) +{ + struct qla_hw_data *ha = vha->hw; + struct tcm_qla2xxx_lport *lport = + (struct tcm_qla2xxx_lport *)target_lport_ptr; + /* + * Setup tgt_ops, local pointer to vha and target_lport_ptr + */ + ha->tgt.tgt_ops = &tcm_qla2xxx_template; + vha->vha_tgt.target_lport_ptr = target_lport_ptr; + lport->qla_vha = vha; + + return 0; +} + +static struct se_wwn *tcm_qla2xxx_make_lport( + struct target_fabric_configfs *tf, + struct config_group *group, + const char *name) +{ + struct tcm_qla2xxx_lport *lport; + u64 wwpn; + int ret = -ENODEV; + + if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0) + return ERR_PTR(-EINVAL); + + lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL); + if (!lport) { + pr_err("Unable to allocate struct tcm_qla2xxx_lport\n"); + return ERR_PTR(-ENOMEM); + } + lport->lport_wwpn = wwpn; + tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN, + wwpn); + sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn); + + ret = tcm_qla2xxx_init_lport(lport); + if (ret != 0) + goto out; + + ret = qlt_lport_register(lport, wwpn, 0, 0, + tcm_qla2xxx_lport_register_cb); + if (ret != 0) + goto out_lport; + + return &lport->lport_wwn; +out_lport: + vfree(lport->lport_loopid_map); + btree_destroy32(&lport->lport_fcport_map); +out: + kfree(lport); + return ERR_PTR(ret); +} + +static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn) +{ + struct tcm_qla2xxx_lport *lport = container_of(wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct scsi_qla_host *vha = lport->qla_vha; + struct se_node_acl *node; + u32 key = 0; + + /* + * Call into qla2x_target.c LLD logic to complete the + * shutdown of struct qla_tgt after the call to + * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above.. + */ + if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped) + qlt_stop_phase2(vha->vha_tgt.qla_tgt); + + qlt_lport_deregister(vha); + + vfree(lport->lport_loopid_map); + btree_for_each_safe32(&lport->lport_fcport_map, key, node) + btree_remove32(&lport->lport_fcport_map, key); + btree_destroy32(&lport->lport_fcport_map); + kfree(lport); +} + +static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha, + void *target_lport_ptr, + u64 npiv_wwpn, u64 npiv_wwnn) +{ + struct fc_vport *vport; + struct Scsi_Host *sh = base_vha->host; + struct scsi_qla_host *npiv_vha; + struct tcm_qla2xxx_lport *lport = + (struct tcm_qla2xxx_lport *)target_lport_ptr; + struct tcm_qla2xxx_lport *base_lport = + (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr; + struct fc_vport_identifiers vport_id; + + if (qla_ini_mode_enabled(base_vha)) { + pr_err("qla2xxx base_vha not enabled for target mode\n"); + return -EPERM; + } + + if (!base_lport || !base_lport->tpg_1 || + !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) { + pr_err("qla2xxx base_lport or tpg_1 not available\n"); + return -EPERM; + } + + memset(&vport_id, 0, sizeof(vport_id)); + vport_id.port_name = npiv_wwpn; + vport_id.node_name = npiv_wwnn; + vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR; + vport_id.vport_type = FC_PORTTYPE_NPIV; + vport_id.disable = false; + + vport = fc_vport_create(sh, 0, &vport_id); + if (!vport) { + pr_err("fc_vport_create failed for qla2xxx_npiv\n"); + return -ENODEV; + } + /* + * Setup local pointer to NPIV vhba + target_lport_ptr + */ + npiv_vha = (struct scsi_qla_host *)vport->dd_data; + npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr; + lport->qla_vha = npiv_vha; + scsi_host_get(npiv_vha->host); + return 0; +} + + +static struct se_wwn *tcm_qla2xxx_npiv_make_lport( + struct target_fabric_configfs *tf, + struct config_group *group, + const char *name) +{ + struct tcm_qla2xxx_lport *lport; + u64 phys_wwpn, npiv_wwpn, npiv_wwnn; + char *p, tmp[128]; + int ret; + + snprintf(tmp, 128, "%s", name); + + p = strchr(tmp, '@'); + if (!p) { + pr_err("Unable to locate NPIV '@' separator\n"); + return ERR_PTR(-EINVAL); + } + *p++ = '\0'; + + if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0) + return ERR_PTR(-EINVAL); + + if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1, + &npiv_wwpn, &npiv_wwnn) < 0) + return ERR_PTR(-EINVAL); + + lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL); + if (!lport) { + pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n"); + return ERR_PTR(-ENOMEM); + } + lport->lport_npiv_wwpn = npiv_wwpn; + lport->lport_npiv_wwnn = npiv_wwnn; + sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn); + + ret = tcm_qla2xxx_init_lport(lport); + if (ret != 0) + goto out; + + ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn, + tcm_qla2xxx_lport_register_npiv_cb); + if (ret != 0) + goto out_lport; + + return &lport->lport_wwn; +out_lport: + vfree(lport->lport_loopid_map); + btree_destroy32(&lport->lport_fcport_map); +out: + kfree(lport); + return ERR_PTR(ret); +} + +static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn) +{ + struct tcm_qla2xxx_lport *lport = container_of(wwn, + struct tcm_qla2xxx_lport, lport_wwn); + struct scsi_qla_host *npiv_vha = lport->qla_vha; + struct qla_hw_data *ha = npiv_vha->hw; + scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); + + scsi_host_put(npiv_vha->host); + /* + * Notify libfc that we want to release the vha->fc_vport + */ + fc_vport_terminate(npiv_vha->fc_vport); + scsi_host_put(base_vha->host); + kfree(lport); +} + + +static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item, + char *page) +{ + return sprintf(page, + "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n", + QLA2XXX_VERSION, utsname()->sysname, + utsname()->machine, utsname()->release); +} + +CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version); + +static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = { + &tcm_qla2xxx_wwn_attr_version, + NULL, +}; + +static const struct target_core_fabric_ops tcm_qla2xxx_ops = { + .module = THIS_MODULE, + .fabric_name = "qla2xxx", + .node_acl_size = sizeof(struct tcm_qla2xxx_nacl), + /* + * XXX: Limit assumes single page per scatter-gather-list entry. + * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096 + */ + .max_data_sg_nents = 1200, + .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn, + .tpg_get_tag = tcm_qla2xxx_get_tag, + .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode, + .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache, + .tpg_check_demo_mode_write_protect = + tcm_qla2xxx_check_demo_write_protect, + .tpg_check_prod_mode_write_protect = + tcm_qla2xxx_check_prod_write_protect, + .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only, + .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only, + .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index, + .check_stop_free = tcm_qla2xxx_check_stop_free, + .release_cmd = tcm_qla2xxx_release_cmd, + .close_session = tcm_qla2xxx_close_session, + .sess_get_initiator_sid = NULL, + .write_pending = tcm_qla2xxx_write_pending, + .get_cmd_state = tcm_qla2xxx_get_cmd_state, + .queue_data_in = tcm_qla2xxx_queue_data_in, + .queue_status = tcm_qla2xxx_queue_status, + .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp, + .aborted_task = tcm_qla2xxx_aborted_task, + /* + * Setup function pointers for generic logic in + * target_core_fabric_configfs.c + */ + .fabric_make_wwn = tcm_qla2xxx_make_lport, + .fabric_drop_wwn = tcm_qla2xxx_drop_lport, + .fabric_make_tpg = tcm_qla2xxx_make_tpg, + .fabric_enable_tpg = tcm_qla2xxx_enable_tpg, + .fabric_drop_tpg = tcm_qla2xxx_drop_tpg, + .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl, + + .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs, + .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs, + .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs, +}; + +static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = { + .module = THIS_MODULE, + .fabric_name = "qla2xxx_npiv", + .node_acl_size = sizeof(struct tcm_qla2xxx_nacl), + .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn, + .tpg_get_tag = tcm_qla2xxx_get_tag, + .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode, + .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache, + .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode, + .tpg_check_prod_mode_write_protect = + tcm_qla2xxx_check_prod_write_protect, + .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only, + .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index, + .check_stop_free = tcm_qla2xxx_check_stop_free, + .release_cmd = tcm_qla2xxx_release_cmd, + .close_session = tcm_qla2xxx_close_session, + .sess_get_initiator_sid = NULL, + .write_pending = tcm_qla2xxx_write_pending, + .get_cmd_state = tcm_qla2xxx_get_cmd_state, + .queue_data_in = tcm_qla2xxx_queue_data_in, + .queue_status = tcm_qla2xxx_queue_status, + .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp, + .aborted_task = tcm_qla2xxx_aborted_task, + /* + * Setup function pointers for generic logic in + * target_core_fabric_configfs.c + */ + .fabric_make_wwn = tcm_qla2xxx_npiv_make_lport, + .fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport, + .fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg, + .fabric_enable_tpg = tcm_qla2xxx_npiv_enable_tpg, + .fabric_drop_tpg = tcm_qla2xxx_drop_tpg, + .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl, + + .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs, +}; + +static int tcm_qla2xxx_register_configfs(void) +{ + int ret; + + pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n", + QLA2XXX_VERSION, utsname()->sysname, + utsname()->machine, utsname()->release); + + ret = target_register_template(&tcm_qla2xxx_ops); + if (ret) + return ret; + + ret = target_register_template(&tcm_qla2xxx_npiv_ops); + if (ret) + goto out_fabric; + + tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free", + WQ_MEM_RECLAIM, 0); + if (!tcm_qla2xxx_free_wq) { + ret = -ENOMEM; + goto out_fabric_npiv; + } + + return 0; + +out_fabric_npiv: + target_unregister_template(&tcm_qla2xxx_npiv_ops); +out_fabric: + target_unregister_template(&tcm_qla2xxx_ops); + return ret; +} + +static void tcm_qla2xxx_deregister_configfs(void) +{ + destroy_workqueue(tcm_qla2xxx_free_wq); + + target_unregister_template(&tcm_qla2xxx_ops); + target_unregister_template(&tcm_qla2xxx_npiv_ops); +} + +static int __init tcm_qla2xxx_init(void) +{ + int ret; + + BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64); + BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64); + BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32); + BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64); + BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12); + BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4); + BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64); + BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64); + BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64); + BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64); + BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64); + BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24); + BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24); + BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64); + + ret = tcm_qla2xxx_register_configfs(); + if (ret < 0) + return ret; + + return 0; +} + +static void __exit tcm_qla2xxx_exit(void) +{ + tcm_qla2xxx_deregister_configfs(); +} + +MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver"); +MODULE_LICENSE("GPL"); +module_init(tcm_qla2xxx_init); +module_exit(tcm_qla2xxx_exit); 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