/* * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx * * based on qla2x00t.c code: * * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin * Copyright (C) 2004 - 2005 Leonid Stoljar * Copyright (C) 2006 Nathaniel Clark * Copyright (C) 2006 - 2010 ID7 Ltd. * * Forward port and refactoring to modern qla2xxx and target/configfs * * Copyright (C) 2010-2013 Nicholas A. Bellinger * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2 * of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "qla_def.h" #include "qla_target.h" static int ql2xtgt_tape_enable; module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(ql2xtgt_tape_enable, "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER."); static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; module_param(qlini_mode, charp, S_IRUGO); MODULE_PARM_DESC(qlini_mode, "Determines when initiator mode will be enabled. Possible values: " "\"exclusive\" - initiator mode will be enabled on load, " "disabled on enabling target mode and then on disabling target mode " "enabled back; " "\"disabled\" - initiator mode will never be enabled; " "\"enabled\" (default) - initiator mode will always stay enabled."); int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; static int temp_sam_status = SAM_STAT_BUSY; /* * From scsi/fc/fc_fcp.h */ enum fcp_resp_rsp_codes { FCP_TMF_CMPL = 0, FCP_DATA_LEN_INVALID = 1, FCP_CMND_FIELDS_INVALID = 2, FCP_DATA_PARAM_MISMATCH = 3, FCP_TMF_REJECTED = 4, FCP_TMF_FAILED = 5, FCP_TMF_INVALID_LUN = 9, }; /* * fc_pri_ta from scsi/fc/fc_fcp.h */ #define FCP_PTA_SIMPLE 0 /* simple task attribute */ #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ #define FCP_PTA_ORDERED 2 /* ordered task attribute */ #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ #define FCP_PTA_MASK 7 /* mask for task attribute field */ #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ /* * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which * must be called under HW lock and could unlock/lock it inside. * It isn't an issue, since in the current implementation on the time when * those functions are called: * * - Either context is IRQ and only IRQ handler can modify HW data, * including rings related fields, * * - Or access to target mode variables from struct qla_tgt doesn't * cross those functions boundaries, except tgt_stop, which * additionally protected by irq_cmd_count. */ /* Predefs for callbacks handed to qla2xxx LLD */ static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, struct atio_from_isp *pkt, uint8_t); static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, int fn, void *iocb, int flags); static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort); static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, struct qla_tgt_srr_imm *imm, int ha_lock); static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd); static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint16_t status, int qfull); static void qlt_disable_vha(struct scsi_qla_host *vha); static void qlt_clear_tgt_db(struct qla_tgt *tgt); static void qlt_send_notify_ack(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *ntfy, uint32_t add_flags, uint16_t resp_code, int resp_code_valid, uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan); static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *imm, int ha_locked); /* * Global Variables */ static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; static struct kmem_cache *qla_tgt_plogi_cachep; static mempool_t *qla_tgt_mgmt_cmd_mempool; static struct workqueue_struct *qla_tgt_wq; static DEFINE_MUTEX(qla_tgt_mutex); static LIST_HEAD(qla_tgt_glist); /* This API intentionally takes dest as a parameter, rather than returning * int value to avoid caller forgetting to issue wmb() after the store */ void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest) { scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); *dest = atomic_inc_return(&base_vha->generation_tick); /* memory barrier */ wmb(); } /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ static struct qla_tgt_sess *qlt_find_sess_by_port_name( struct qla_tgt *tgt, const uint8_t *port_name) { struct qla_tgt_sess *sess; list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { if (!memcmp(sess->port_name, port_name, WWN_SIZE)) return sess; } return NULL; } /* Might release hw lock, then reaquire!! */ static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) { /* Send marker if required */ if (unlikely(vha->marker_needed != 0)) { int rc = qla2x00_issue_marker(vha, vha_locked); if (rc != QLA_SUCCESS) { ql_dbg(ql_dbg_tgt, vha, 0xe03d, "qla_target(%d): issue_marker() failed\n", vha->vp_idx); } return rc; } return QLA_SUCCESS; } static inline struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, uint8_t *d_id) { struct qla_hw_data *ha = vha->hw; uint8_t vp_idx; if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) return NULL; if (vha->d_id.b.al_pa == d_id[2]) return vha; BUG_ON(ha->tgt.tgt_vp_map == NULL); vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; if (likely(test_bit(vp_idx, ha->vp_idx_map))) return ha->tgt.tgt_vp_map[vp_idx].vha; return NULL; } static inline struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, uint16_t vp_idx) { struct qla_hw_data *ha = vha->hw; if (vha->vp_idx == vp_idx) return vha; BUG_ON(ha->tgt.tgt_vp_map == NULL); if (likely(test_bit(vp_idx, ha->vp_idx_map))) return ha->tgt.tgt_vp_map[vp_idx].vha; return NULL; } static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) { unsigned long flags; spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); vha->hw->tgt.num_pend_cmds++; if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds) vha->qla_stats.stat_max_pend_cmds = vha->hw->tgt.num_pend_cmds; spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); } static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) { unsigned long flags; spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); vha->hw->tgt.num_pend_cmds--; spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); } static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint8_t ha_locked) { ql_dbg(ql_dbg_tgt, vha, 0xe072, "%s: qla_target(%d): type %x ox_id %04x\n", __func__, vha->vp_idx, atio->u.raw.entry_type, be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); switch (atio->u.raw.entry_type) { case ATIO_TYPE7: { struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, atio->u.isp24.fcp_hdr.d_id); if (unlikely(NULL == host)) { ql_dbg(ql_dbg_tgt, vha, 0xe03e, "qla_target(%d): Received ATIO_TYPE7 " "with unknown d_id %x:%x:%x\n", vha->vp_idx, atio->u.isp24.fcp_hdr.d_id[0], atio->u.isp24.fcp_hdr.d_id[1], atio->u.isp24.fcp_hdr.d_id[2]); break; } qlt_24xx_atio_pkt(host, atio, ha_locked); break; } case IMMED_NOTIFY_TYPE: { struct scsi_qla_host *host = vha; struct imm_ntfy_from_isp *entry = (struct imm_ntfy_from_isp *)atio; if ((entry->u.isp24.vp_index != 0xFF) && (entry->u.isp24.nport_handle != 0xFFFF)) { host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe03f, "qla_target(%d): Received " "ATIO (IMMED_NOTIFY_TYPE) " "with unknown vp_index %d\n", vha->vp_idx, entry->u.isp24.vp_index); break; } } qlt_24xx_atio_pkt(host, atio, ha_locked); break; } default: ql_dbg(ql_dbg_tgt, vha, 0xe040, "qla_target(%d): Received unknown ATIO atio " "type %x\n", vha->vp_idx, atio->u.raw.entry_type); break; } return false; } void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) { switch (pkt->entry_type) { case CTIO_CRC2: ql_dbg(ql_dbg_tgt, vha, 0xe073, "qla_target(%d):%s: CRC2 Response pkt\n", vha->vp_idx, __func__); case CTIO_TYPE7: { struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, entry->vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe041, "qla_target(%d): Response pkt (CTIO_TYPE7) " "received, with unknown vp_index %d\n", vha->vp_idx, entry->vp_index); break; } qlt_response_pkt(host, pkt); break; } case IMMED_NOTIFY_TYPE: { struct scsi_qla_host *host = vha; struct imm_ntfy_from_isp *entry = (struct imm_ntfy_from_isp *)pkt; host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe042, "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " "received, with unknown vp_index %d\n", vha->vp_idx, entry->u.isp24.vp_index); break; } qlt_response_pkt(host, pkt); break; } case NOTIFY_ACK_TYPE: { struct scsi_qla_host *host = vha; struct nack_to_isp *entry = (struct nack_to_isp *)pkt; if (0xFF != entry->u.isp24.vp_index) { host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe043, "qla_target(%d): Response " "pkt (NOTIFY_ACK_TYPE) " "received, with unknown " "vp_index %d\n", vha->vp_idx, entry->u.isp24.vp_index); break; } } qlt_response_pkt(host, pkt); break; } case ABTS_RECV_24XX: { struct abts_recv_from_24xx *entry = (struct abts_recv_from_24xx *)pkt; struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, entry->vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe044, "qla_target(%d): Response pkt " "(ABTS_RECV_24XX) received, with unknown " "vp_index %d\n", vha->vp_idx, entry->vp_index); break; } qlt_response_pkt(host, pkt); break; } case ABTS_RESP_24XX: { struct abts_resp_to_24xx *entry = (struct abts_resp_to_24xx *)pkt; struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, entry->vp_index); if (unlikely(!host)) { ql_dbg(ql_dbg_tgt, vha, 0xe045, "qla_target(%d): Response pkt " "(ABTS_RECV_24XX) received, with unknown " "vp_index %d\n", vha->vp_idx, entry->vp_index); break; } qlt_response_pkt(host, pkt); break; } default: qlt_response_pkt(vha, pkt); break; } } /* * All qlt_plogi_ack_t operations are protected by hardware_lock */ /* * This is a zero-base ref-counting solution, since hardware_lock * guarantees that ref_count is not modified concurrently. * Upon successful return content of iocb is undefined */ static qlt_plogi_ack_t * qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id, struct imm_ntfy_from_isp *iocb) { qlt_plogi_ack_t *pla; list_for_each_entry(pla, &vha->plogi_ack_list, list) { if (pla->id.b24 == id->b24) { qlt_send_term_imm_notif(vha, &pla->iocb, 1); pla->iocb = *iocb; return pla; } } pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC); if (!pla) { ql_dbg(ql_dbg_async, vha, 0x5088, "qla_target(%d): Allocation of plogi_ack failed\n", vha->vp_idx); return NULL; } pla->iocb = *iocb; pla->id = *id; list_add_tail(&pla->list, &vha->plogi_ack_list); return pla; } static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla) { BUG_ON(!pla->ref_count); pla->ref_count--; if (pla->ref_count) return; ql_dbg(ql_dbg_async, vha, 0x5089, "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x" " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0], le16_to_cpu(pla->iocb.u.isp24.nport_handle), pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id); qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0); list_del(&pla->list); kmem_cache_free(qla_tgt_plogi_cachep, pla); } static void qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla, struct qla_tgt_sess *sess, qlt_plogi_link_t link) { /* Inc ref_count first because link might already be pointing at pla */ pla->ref_count++; if (sess->plogi_link[link]) qlt_plogi_ack_unref(vha, sess->plogi_link[link]); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097, "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC" " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name, pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0], pla->ref_count); sess->plogi_link[link] = pla; } typedef struct { /* These fields must be initialized by the caller */ port_id_t id; /* * number of cmds dropped while we were waiting for * initiator to ack LOGO initialize to 1 if LOGO is * triggered by a command, otherwise, to 0 */ int cmd_count; /* These fields are used by callee */ struct list_head list; } qlt_port_logo_t; static void qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo) { qlt_port_logo_t *tmp; int res; mutex_lock(&vha->vha_tgt.tgt_mutex); list_for_each_entry(tmp, &vha->logo_list, list) { if (tmp->id.b24 == logo->id.b24) { tmp->cmd_count += logo->cmd_count; mutex_unlock(&vha->vha_tgt.tgt_mutex); return; } } list_add_tail(&logo->list, &vha->logo_list); mutex_unlock(&vha->vha_tgt.tgt_mutex); res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id); mutex_lock(&vha->vha_tgt.tgt_mutex); list_del(&logo->list); mutex_unlock(&vha->vha_tgt.tgt_mutex); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098, "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n", logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa, logo->cmd_count, res); } static void qlt_free_session_done(struct work_struct *work) { struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, free_work); struct qla_tgt *tgt = sess->tgt; struct scsi_qla_host *vha = sess->vha; struct qla_hw_data *ha = vha->hw; unsigned long flags; bool logout_started = false; fc_port_t fcport; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084, "%s: se_sess %p / sess %p from port %8phC loop_id %#04x" " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n", __func__, sess->se_sess, sess, sess->port_name, sess->loop_id, sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, sess->logout_on_delete, sess->keep_nport_handle, sess->send_els_logo); BUG_ON(!tgt); if (sess->send_els_logo) { qlt_port_logo_t logo; logo.id = sess->s_id; logo.cmd_count = 0; qlt_send_first_logo(vha, &logo); } if (sess->logout_on_delete) { int rc; memset(&fcport, 0, sizeof(fcport)); fcport.loop_id = sess->loop_id; fcport.d_id = sess->s_id; memcpy(fcport.port_name, sess->port_name, WWN_SIZE); fcport.vha = vha; fcport.tgt_session = sess; rc = qla2x00_post_async_logout_work(vha, &fcport, NULL); if (rc != QLA_SUCCESS) ql_log(ql_log_warn, vha, 0xf085, "Schedule logo failed sess %p rc %d\n", sess, rc); else logout_started = true; } /* * Release the target session for FC Nexus from fabric module code. */ if (sess->se_sess != NULL) ha->tgt.tgt_ops->free_session(sess); if (logout_started) { bool traced = false; u16 cnt = 0; while (!ACCESS_ONCE(sess->logout_completed)) { if (!traced) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086, "%s: waiting for sess %p logout\n", __func__, sess); traced = true; } msleep(100); cnt++; if (cnt > 200) break; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087, "%s: sess %p logout completed\n", __func__, sess); } spin_lock_irqsave(&ha->hardware_lock, flags); { qlt_plogi_ack_t *own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]; qlt_plogi_ack_t *con = sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]; if (con) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099, "se_sess %p / sess %p port %8phC is gone," " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n", sess->se_sess, sess, sess->port_name, own ? "releasing own PLOGI" : "no own PLOGI pending", own ? own->ref_count : -1, con->iocb.u.isp24.port_name, con->ref_count); qlt_plogi_ack_unref(vha, con); } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a, "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n", sess->se_sess, sess, sess->port_name, own ? "releasing own PLOGI" : "no own PLOGI pending", own ? own->ref_count : -1); } if (own) qlt_plogi_ack_unref(vha, own); } list_del(&sess->sess_list_entry); spin_unlock_irqrestore(&ha->hardware_lock, flags); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, "Unregistration of sess %p finished\n", sess); kfree(sess); /* * We need to protect against race, when tgt is freed before or * inside wake_up() */ tgt->sess_count--; if (tgt->sess_count == 0) wake_up_all(&tgt->waitQ); } /* ha->tgt.sess_lock supposed to be held on entry */ static void qlt_release_session(struct kref *kref) { struct qla_tgt_sess *sess = container_of(kref, struct qla_tgt_sess, sess_kref); struct scsi_qla_host *vha = sess->vha; if (sess->se_sess) vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); if (!list_empty(&sess->del_list_entry)) list_del_init(&sess->del_list_entry); sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; INIT_WORK(&sess->free_work, qlt_free_session_done); schedule_work(&sess->free_work); } void qlt_put_sess(struct qla_tgt_sess *sess) { if (!sess) return; assert_spin_locked(&sess->vha->hw->tgt.sess_lock); kref_put(&sess->sess_kref, qlt_release_session); } EXPORT_SYMBOL(qlt_put_sess); static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) { struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess = NULL; uint16_t loop_id; int res = 0; struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; unsigned long flags; loop_id = le16_to_cpu(n->u.isp24.nport_handle); if (loop_id == 0xFFFF) { /* Global event */ atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); spin_lock_irqsave(&ha->tgt.sess_lock, flags); qlt_clear_tgt_db(vha->vha_tgt.qla_tgt); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); #if 0 /* FIXME: do we need to choose a session here? */ if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { sess = list_entry(ha->tgt.qla_tgt->sess_list.next, typeof(*sess), sess_list_entry); switch (mcmd) { case QLA_TGT_NEXUS_LOSS_SESS: mcmd = QLA_TGT_NEXUS_LOSS; break; case QLA_TGT_ABORT_ALL_SESS: mcmd = QLA_TGT_ABORT_ALL; break; case QLA_TGT_NEXUS_LOSS: case QLA_TGT_ABORT_ALL: break; default: ql_dbg(ql_dbg_tgt, vha, 0xe046, "qla_target(%d): Not allowed " "command %x in %s", vha->vp_idx, mcmd, __func__); sess = NULL; break; } } else sess = NULL; #endif } else { spin_lock_irqsave(&ha->tgt.sess_lock, flags); sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); } ql_dbg(ql_dbg_tgt, vha, 0xe000, "Using sess for qla_tgt_reset: %p\n", sess); if (!sess) { res = -ESRCH; return res; } ql_dbg(ql_dbg_tgt, vha, 0xe047, "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " "loop_id %d)\n", vha->host_no, sess, sess->port_name, mcmd, loop_id); return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK); } /* ha->tgt.sess_lock supposed to be held on entry */ static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, bool immediate) { struct qla_tgt *tgt = sess->tgt; uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; if (sess->deleted) { /* Upgrade to unconditional deletion in case it was temporary */ if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING) list_del(&sess->del_list_entry); else return; } ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, "Scheduling sess %p for deletion\n", sess); if (immediate) { dev_loss_tmo = 0; sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; list_add(&sess->del_list_entry, &tgt->del_sess_list); } else { sess->deleted = QLA_SESS_DELETION_PENDING; list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); } sess->expires = jiffies + dev_loss_tmo * HZ; ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)" " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n", sess->vha->vp_idx, sess->port_name, sess->loop_id, sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete, sess->generation); if (immediate) mod_delayed_work(system_wq, &tgt->sess_del_work, 0); else schedule_delayed_work(&tgt->sess_del_work, sess->expires - jiffies); } /* ha->tgt.sess_lock supposed to be held on entry */ static void qlt_clear_tgt_db(struct qla_tgt *tgt) { struct qla_tgt_sess *sess; list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) qlt_schedule_sess_for_deletion(sess, true); /* At this point tgt could be already dead */ } static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, uint16_t *loop_id) { struct qla_hw_data *ha = vha->hw; dma_addr_t gid_list_dma; struct gid_list_info *gid_list; char *id_iter; int res, rc, i; uint16_t entries; gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), &gid_list_dma, GFP_KERNEL); if (!gid_list) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, "qla_target(%d): DMA Alloc failed of %u\n", vha->vp_idx, qla2x00_gid_list_size(ha)); return -ENOMEM; } /* Get list of logged in devices */ rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); if (rc != QLA_SUCCESS) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, "qla_target(%d): get_id_list() failed: %x\n", vha->vp_idx, rc); res = -EBUSY; goto out_free_id_list; } id_iter = (char *)gid_list; res = -ENOENT; for (i = 0; i < entries; i++) { struct gid_list_info *gid = (struct gid_list_info *)id_iter; if ((gid->al_pa == s_id[2]) && (gid->area == s_id[1]) && (gid->domain == s_id[0])) { *loop_id = le16_to_cpu(gid->loop_id); res = 0; break; } id_iter += ha->gid_list_info_size; } out_free_id_list: dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), gid_list, gid_list_dma); return res; } /* ha->tgt.sess_lock supposed to be held on entry */ static void qlt_undelete_sess(struct qla_tgt_sess *sess) { BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING); list_del_init(&sess->del_list_entry); sess->deleted = 0; } static void qlt_del_sess_work_fn(struct delayed_work *work) { struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_del_work); struct scsi_qla_host *vha = tgt->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; unsigned long flags, elapsed; spin_lock_irqsave(&ha->tgt.sess_lock, flags); while (!list_empty(&tgt->del_sess_list)) { sess = list_entry(tgt->del_sess_list.next, typeof(*sess), del_list_entry); elapsed = jiffies; if (time_after_eq(elapsed, sess->expires)) { /* No turning back */ list_del_init(&sess->del_list_entry); sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, "Timeout: sess %p about to be deleted\n", sess); if (sess->se_sess) ha->tgt.tgt_ops->shutdown_sess(sess); qlt_put_sess(sess); } else { schedule_delayed_work(&tgt->sess_del_work, sess->expires - elapsed); break; } } spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); } /* * Adds an extra ref to allow to drop hw lock after adding sess to the list. * Caller must put it. */ static struct qla_tgt_sess *qlt_create_sess( struct scsi_qla_host *vha, fc_port_t *fcport, bool local) { struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; unsigned long flags; /* Check to avoid double sessions */ spin_lock_irqsave(&ha->tgt.sess_lock, flags); list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, sess_list_entry) { if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, "Double sess %p found (s_id %x:%x:%x, " "loop_id %d), updating to d_id %x:%x:%x, " "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa, sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain, fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id); /* Cannot undelete at this point */ if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return NULL; } if (sess->deleted) qlt_undelete_sess(sess); if (!sess->se_sess) { if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, &sess->port_name[0], sess) < 0) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return NULL; } } kref_get(&sess->sess_kref); ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, (fcport->flags & FCF_CONF_COMP_SUPPORTED)); if (sess->local && !local) sess->local = 0; qlt_do_generation_tick(vha, &sess->generation); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return sess; } } spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); sess = kzalloc(sizeof(*sess), GFP_KERNEL); if (!sess) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, "qla_target(%u): session allocation failed, all commands " "from port %8phC will be refused", vha->vp_idx, fcport->port_name); return NULL; } sess->tgt = vha->vha_tgt.qla_tgt; sess->vha = vha; sess->s_id = fcport->d_id; sess->loop_id = fcport->loop_id; sess->local = local; kref_init(&sess->sess_kref); INIT_LIST_HEAD(&sess->del_list_entry); /* Under normal circumstances we want to logout from firmware when * session eventually ends and release corresponding nport handle. * In the exception cases (e.g. when new PLOGI is waiting) corresponding * code will adjust these flags as necessary. */ sess->logout_on_delete = 1; sess->keep_nport_handle = 0; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", sess, vha->vha_tgt.qla_tgt); sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); spin_lock_irqsave(&ha->tgt.sess_lock, flags); list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); vha->vha_tgt.qla_tgt->sess_count++; qlt_do_generation_tick(vha, &sess->generation); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " "s_id %x:%x:%x, confirmed completion %ssupported) added\n", vha->vp_idx, local ? "local " : "", fcport->port_name, fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); /* * Determine if this fc_port->port_name is allowed to access * target mode using explict NodeACLs+MappedLUNs, or using * TPG demo mode. If this is successful a target mode FC nexus * is created. */ if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, &fcport->port_name[0], sess) < 0) { return NULL; } else { /* * Take an extra reference to ->sess_kref here to handle qla_tgt_sess * access across ->tgt.sess_lock reaquire. */ kref_get(&sess->sess_kref); } return sess; } /* * Called from qla2x00_reg_remote_port() */ void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_sess *sess; unsigned long flags; if (!vha->hw->tgt.tgt_ops) return; if (!tgt || (fcport->port_type != FCT_INITIATOR)) return; if (qla_ini_mode_enabled(vha)) return; spin_lock_irqsave(&ha->tgt.sess_lock, flags); if (tgt->tgt_stop) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return; } sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); if (!sess) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); mutex_lock(&vha->vha_tgt.tgt_mutex); sess = qlt_create_sess(vha, fcport, false); mutex_unlock(&vha->vha_tgt.tgt_mutex); spin_lock_irqsave(&ha->tgt.sess_lock, flags); } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { /* Point of no return */ spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return; } else { kref_get(&sess->sess_kref); if (sess->deleted) { qlt_undelete_sess(sess); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, "qla_target(%u): %ssession for port %8phC " "(loop ID %d) reappeared\n", vha->vp_idx, sess->local ? "local " : "", sess->port_name, sess->loop_id); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, "Reappeared sess %p\n", sess); } ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, (fcport->flags & FCF_CONF_COMP_SUPPORTED)); } if (sess && sess->local) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, "qla_target(%u): local session for " "port %8phC (loop ID %d) became global\n", vha->vp_idx, fcport->port_name, sess->loop_id); sess->local = 0; } qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); } /* * max_gen - specifies maximum session generation * at which this deletion requestion is still valid */ void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen) { struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_sess *sess; unsigned long flags; if (!vha->hw->tgt.tgt_ops) return; if (!tgt) return; spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); if (tgt->tgt_stop) { spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); return; } sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); if (!sess) { spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); return; } if (max_gen - sess->generation < 0) { spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092, "Ignoring stale deletion request for se_sess %p / sess %p" " for port %8phC, req_gen %d, sess_gen %d\n", sess->se_sess, sess, sess->port_name, max_gen, sess->generation); return; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); sess->local = 1; qlt_schedule_sess_for_deletion(sess, false); spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); } static inline int test_tgt_sess_count(struct qla_tgt *tgt) { struct qla_hw_data *ha = tgt->ha; unsigned long flags; int res; /* * We need to protect against race, when tgt is freed before or * inside wake_up() */ spin_lock_irqsave(&ha->hardware_lock, flags); ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, "tgt %p, empty(sess_list)=%d sess_count=%d\n", tgt, list_empty(&tgt->sess_list), tgt->sess_count); res = (tgt->sess_count == 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); return res; } /* Called by tcm_qla2xxx configfs code */ int qlt_stop_phase1(struct qla_tgt *tgt) { struct scsi_qla_host *vha = tgt->vha; struct qla_hw_data *ha = tgt->ha; unsigned long flags; mutex_lock(&qla_tgt_mutex); if (!vha->fc_vport) { struct Scsi_Host *sh = vha->host; struct fc_host_attrs *fc_host = shost_to_fc_host(sh); bool npiv_vports; spin_lock_irqsave(sh->host_lock, flags); npiv_vports = (fc_host->npiv_vports_inuse); spin_unlock_irqrestore(sh->host_lock, flags); if (npiv_vports) { mutex_unlock(&qla_tgt_mutex); return -EPERM; } } if (tgt->tgt_stop || tgt->tgt_stopped) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, "Already in tgt->tgt_stop or tgt_stopped state\n"); mutex_unlock(&qla_tgt_mutex); return -EPERM; } ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", vha->host_no, vha); /* * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. * Lock is needed, because we still can get an incoming packet. */ mutex_lock(&vha->vha_tgt.tgt_mutex); spin_lock_irqsave(&ha->tgt.sess_lock, flags); tgt->tgt_stop = 1; qlt_clear_tgt_db(tgt); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); mutex_unlock(&vha->vha_tgt.tgt_mutex); mutex_unlock(&qla_tgt_mutex); flush_delayed_work(&tgt->sess_del_work); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, "Waiting for sess works (tgt %p)", tgt); spin_lock_irqsave(&tgt->sess_work_lock, flags); while (!list_empty(&tgt->sess_works_list)) { spin_unlock_irqrestore(&tgt->sess_work_lock, flags); flush_scheduled_work(); spin_lock_irqsave(&tgt->sess_work_lock, flags); } spin_unlock_irqrestore(&tgt->sess_work_lock, flags); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, "Waiting for tgt %p: list_empty(sess_list)=%d " "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), tgt->sess_count); wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); /* Big hammer */ if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) qlt_disable_vha(vha); /* Wait for sessions to clear out (just in case) */ wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); return 0; } EXPORT_SYMBOL(qlt_stop_phase1); /* Called by tcm_qla2xxx configfs code */ void qlt_stop_phase2(struct qla_tgt *tgt) { struct qla_hw_data *ha = tgt->ha; scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); unsigned long flags; if (tgt->tgt_stopped) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, "Already in tgt->tgt_stopped state\n"); dump_stack(); return; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, "Waiting for %d IRQ commands to complete (tgt %p)", tgt->irq_cmd_count, tgt); mutex_lock(&tgt->ha->optrom_mutex); mutex_lock(&vha->vha_tgt.tgt_mutex); spin_lock_irqsave(&ha->hardware_lock, flags); while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) { spin_unlock_irqrestore(&ha->hardware_lock, flags); udelay(2); spin_lock_irqsave(&ha->hardware_lock, flags); } tgt->tgt_stop = 0; tgt->tgt_stopped = 1; spin_unlock_irqrestore(&ha->hardware_lock, flags); mutex_unlock(&vha->vha_tgt.tgt_mutex); mutex_unlock(&tgt->ha->optrom_mutex); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", tgt); } EXPORT_SYMBOL(qlt_stop_phase2); /* Called from qlt_remove_target() -> qla2x00_remove_one() */ static void qlt_release(struct qla_tgt *tgt) { scsi_qla_host_t *vha = tgt->vha; if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) qlt_stop_phase2(tgt); vha->vha_tgt.qla_tgt = NULL; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, "Release of tgt %p finished\n", tgt); kfree(tgt); } /* ha->hardware_lock supposed to be held on entry */ static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, const void *param, unsigned int param_size) { struct qla_tgt_sess_work_param *prm; unsigned long flags; prm = kzalloc(sizeof(*prm), GFP_ATOMIC); if (!prm) { ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, "qla_target(%d): Unable to create session " "work, command will be refused", 0); return -ENOMEM; } ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, "Scheduling work (type %d, prm %p)" " to find session for param %p (size %d, tgt %p)\n", type, prm, param, param_size, tgt); prm->type = type; memcpy(&prm->tm_iocb, param, param_size); spin_lock_irqsave(&tgt->sess_work_lock, flags); list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); spin_unlock_irqrestore(&tgt->sess_work_lock, flags); schedule_work(&tgt->sess_work); return 0; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_send_notify_ack(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *ntfy, uint32_t add_flags, uint16_t resp_code, int resp_code_valid, uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) { struct qla_hw_data *ha = vha->hw; request_t *pkt; struct nack_to_isp *nack; ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); /* Send marker if required */ if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) return; pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); if (!pkt) { ql_dbg(ql_dbg_tgt, vha, 0xe049, "qla_target(%d): %s failed: unable to allocate " "request packet\n", vha->vp_idx, __func__); return; } if (vha->vha_tgt.qla_tgt != NULL) vha->vha_tgt.qla_tgt->notify_ack_expected++; pkt->entry_type = NOTIFY_ACK_TYPE; pkt->entry_count = 1; nack = (struct nack_to_isp *)pkt; nack->ox_id = ntfy->ox_id; nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { nack->u.isp24.flags = ntfy->u.isp24.flags & cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); } nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; nack->u.isp24.status = ntfy->u.isp24.status; nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); nack->u.isp24.srr_reject_code = srr_reject_code; nack->u.isp24.srr_reject_code_expl = srr_explan; nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; ql_dbg(ql_dbg_tgt, vha, 0xe005, "qla_target(%d): Sending 24xx Notify Ack %d\n", vha->vp_idx, nack->u.isp24.status); /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, struct abts_recv_from_24xx *abts, uint32_t status, bool ids_reversed) { struct qla_hw_data *ha = vha->hw; struct abts_resp_to_24xx *resp; uint32_t f_ctl; uint8_t *p; ql_dbg(ql_dbg_tgt, vha, 0xe006, "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", ha, abts, status); /* Send marker if required */ if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) return; resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); if (!resp) { ql_dbg(ql_dbg_tgt, vha, 0xe04a, "qla_target(%d): %s failed: unable to allocate " "request packet", vha->vp_idx, __func__); return; } resp->entry_type = ABTS_RESP_24XX; resp->entry_count = 1; resp->nport_handle = abts->nport_handle; resp->vp_index = vha->vp_idx; resp->sof_type = abts->sof_type; resp->exchange_address = abts->exchange_address; resp->fcp_hdr_le = abts->fcp_hdr_le; f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | F_CTL_LAST_SEQ | F_CTL_END_SEQ | F_CTL_SEQ_INITIATIVE); p = (uint8_t *)&f_ctl; resp->fcp_hdr_le.f_ctl[0] = *p++; resp->fcp_hdr_le.f_ctl[1] = *p++; resp->fcp_hdr_le.f_ctl[2] = *p; if (ids_reversed) { resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; } else { resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; } resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; if (status == FCP_TMF_CMPL) { resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; resp->payload.ba_acct.low_seq_cnt = 0x0000; resp->payload.ba_acct.high_seq_cnt = 0xFFFF; resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; } else { resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; resp->payload.ba_rjt.reason_code = BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; /* Other bytes are zero */ } vha->vha_tgt.qla_tgt->abts_resp_expected++; /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, struct abts_resp_from_24xx_fw *entry) { struct ctio7_to_24xx *ctio; ql_dbg(ql_dbg_tgt, vha, 0xe007, "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); /* Send marker if required */ if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) return; ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); if (ctio == NULL) { ql_dbg(ql_dbg_tgt, vha, 0xe04b, "qla_target(%d): %s failed: unable to allocate " "request packet\n", vha->vp_idx, __func__); return; } /* * We've got on entrance firmware's response on by us generated * ABTS response. So, in it ID fields are reversed. */ ctio->entry_type = CTIO_TYPE7; ctio->entry_count = 1; ctio->nport_handle = entry->nport_handle; ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); ctio->vp_index = vha->vp_idx; ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; ctio->exchange_addr = entry->exchange_addr_to_abort; ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE); ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true); } static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag) { struct qla_tgt_sess_op *op; struct qla_tgt_cmd *cmd; spin_lock(&vha->cmd_list_lock); list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { if (tag == op->atio.u.isp24.exchange_addr) { op->aborted = true; spin_unlock(&vha->cmd_list_lock); return 1; } } list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { if (tag == cmd->atio.u.isp24.exchange_addr) { cmd->aborted = 1; spin_unlock(&vha->cmd_list_lock); return 1; } } spin_unlock(&vha->cmd_list_lock); return 0; } /* drop cmds for the given lun * XXX only looks for cmds on the port through which lun reset was recieved * XXX does not go through the list of other port (which may have cmds * for the same lun) */ static void abort_cmds_for_lun(struct scsi_qla_host *vha, uint32_t lun, uint8_t *s_id) { struct qla_tgt_sess_op *op; struct qla_tgt_cmd *cmd; uint32_t key; key = sid_to_key(s_id); spin_lock(&vha->cmd_list_lock); list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { uint32_t op_key; uint32_t op_lun; op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); op_lun = scsilun_to_int( (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun); if (op_key == key && op_lun == lun) op->aborted = true; } list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { uint32_t cmd_key; uint32_t cmd_lun; cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); cmd_lun = scsilun_to_int( (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun); if (cmd_key == key && cmd_lun == lun) cmd->aborted = 1; } spin_unlock(&vha->cmd_list_lock); } /* ha->hardware_lock supposed to be held on entry */ static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) { struct qla_hw_data *ha = vha->hw; struct se_session *se_sess = sess->se_sess; struct qla_tgt_mgmt_cmd *mcmd; struct se_cmd *se_cmd; u32 lun = 0; int rc; bool found_lun = false; spin_lock(&se_sess->sess_cmd_lock); list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { struct qla_tgt_cmd *cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); if (se_cmd->tag == abts->exchange_addr_to_abort) { lun = cmd->unpacked_lun; found_lun = true; break; } } spin_unlock(&se_sess->sess_cmd_lock); /* cmd not in LIO lists, look in qla list */ if (!found_lun) { if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { /* send TASK_ABORT response immediately */ qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false); return 0; } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081, "unable to find cmd in driver or LIO for tag 0x%x\n", abts->exchange_addr_to_abort); return -ENOENT; } } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, "qla_target(%d): task abort (tag=%d)\n", vha->vp_idx, abts->exchange_addr_to_abort); mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); if (mcmd == NULL) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, "qla_target(%d): %s: Allocation of ABORT cmd failed", vha->vp_idx, __func__); return -ENOMEM; } memset(mcmd, 0, sizeof(*mcmd)); mcmd->sess = sess; memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); mcmd->reset_count = vha->hw->chip_reset; rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, abts->exchange_addr_to_abort); if (rc != 0) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, "qla_target(%d): tgt_ops->handle_tmr()" " failed: %d", vha->vp_idx, rc); mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); return -EFAULT; } return 0; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, struct abts_recv_from_24xx *abts) { struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; uint32_t tag = abts->exchange_addr_to_abort; uint8_t s_id[3]; int rc; unsigned long flags; if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, "qla_target(%d): ABTS: Abort Sequence not " "supported\n", vha->vp_idx); qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); return; } if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, "qla_target(%d): ABTS: Unknown Exchange " "Address received\n", vha->vp_idx); qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); return; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, "qla_target(%d): task abort (s_id=%x:%x:%x, " "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, le32_to_cpu(abts->fcp_hdr_le.parameter)); s_id[0] = abts->fcp_hdr_le.s_id[2]; s_id[1] = abts->fcp_hdr_le.s_id[1]; s_id[2] = abts->fcp_hdr_le.s_id[0]; spin_lock_irqsave(&ha->tgt.sess_lock, flags); sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); if (!sess) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, "qla_target(%d): task abort for non-existant session\n", vha->vp_idx); rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); if (rc != 0) { qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); } return; } spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); return; } rc = __qlt_24xx_handle_abts(vha, abts, sess); if (rc != 0) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", vha->vp_idx, rc); qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); return; } } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) { struct atio_from_isp *atio = &mcmd->orig_iocb.atio; struct ctio7_to_24xx *ctio; uint16_t temp; ql_dbg(ql_dbg_tgt, ha, 0xe008, "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", ha, atio, resp_code); /* Send marker if required */ if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) return; ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); if (ctio == NULL) { ql_dbg(ql_dbg_tgt, ha, 0xe04c, "qla_target(%d): %s failed: unable to allocate " "request packet\n", ha->vp_idx, __func__); return; } ctio->entry_type = CTIO_TYPE7; ctio->entry_count = 1; ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; ctio->nport_handle = mcmd->sess->loop_id; ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); ctio->vp_index = ha->vp_idx; ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; ctio->exchange_addr = atio->u.isp24.exchange_addr; ctio->u.status1.flags = (atio->u.isp24.attr << 9) | cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS); temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); ctio->u.status1.ox_id = cpu_to_le16(temp); ctio->u.status1.scsi_status = cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); ctio->u.status1.response_len = cpu_to_le16(8); ctio->u.status1.sense_data[0] = resp_code; /* Memory Barrier */ wmb(); qla2x00_start_iocbs(ha, ha->req); } void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) { mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); } EXPORT_SYMBOL(qlt_free_mcmd); /* callback from target fabric module code */ void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) { struct scsi_qla_host *vha = mcmd->sess->vha; struct qla_hw_data *ha = vha->hw; unsigned long flags; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, "TM response mcmd (%p) status %#x state %#x", mcmd, mcmd->fc_tm_rsp, mcmd->flags); spin_lock_irqsave(&ha->hardware_lock, flags); if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) { /* * Either the port is not online or this request was from * previous life, just abort the processing. */ ql_dbg(ql_dbg_async, vha, 0xe100, "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n", vha->flags.online, qla2x00_reset_active(vha), mcmd->reset_count, ha->chip_reset); ha->tgt.tgt_ops->free_mcmd(mcmd); spin_unlock_irqrestore(&ha->hardware_lock, flags); return; } if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0); else { if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, mcmd->fc_tm_rsp, false); else qlt_24xx_send_task_mgmt_ctio(vha, mcmd, mcmd->fc_tm_rsp); } /* * Make the callback for ->free_mcmd() to queue_work() and invoke * target_put_sess_cmd() to drop cmd_kref to 1. The final * target_put_sess_cmd() call will be made from TFO->check_stop_free() * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> * qlt_xmit_tm_rsp() returns here.. */ ha->tgt.tgt_ops->free_mcmd(mcmd); spin_unlock_irqrestore(&ha->hardware_lock, flags); } EXPORT_SYMBOL(qlt_xmit_tm_rsp); /* No locks */ static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) { struct qla_tgt_cmd *cmd = prm->cmd; BUG_ON(cmd->sg_cnt == 0); prm->sg = (struct scatterlist *)cmd->sg; prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); if (unlikely(prm->seg_cnt == 0)) goto out_err; prm->cmd->sg_mapped = 1; if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { /* * If greater than four sg entries then we need to allocate * the continuation entries */ if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont); } else { /* DIF */ if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); prm->tot_dsds = prm->seg_cnt; } else prm->tot_dsds = prm->seg_cnt; if (cmd->prot_sg_cnt) { prm->prot_sg = cmd->prot_sg; prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, cmd->dma_data_direction); if (unlikely(prm->prot_seg_cnt == 0)) goto out_err; if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { /* Dif Bundling not support here */ prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); prm->tot_dsds += prm->prot_seg_cnt; } else prm->tot_dsds += prm->prot_seg_cnt; } } return 0; out_err: ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, "qla_target(%d): PCI mapping failed: sg_cnt=%d", 0, prm->cmd->sg_cnt); return -1; } static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) { struct qla_hw_data *ha = vha->hw; if (!cmd->sg_mapped) return; pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); cmd->sg_mapped = 0; if (cmd->prot_sg_cnt) pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, cmd->dma_data_direction); if (cmd->ctx_dsd_alloced) qla2x00_clean_dsd_pool(ha, NULL, cmd); if (cmd->ctx) dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); } static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, uint32_t req_cnt) { uint32_t cnt, cnt_in; if (vha->req->cnt < (req_cnt + 2)) { cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); if (vha->req->ring_index < cnt) vha->req->cnt = cnt - vha->req->ring_index; else vha->req->cnt = vha->req->length - (vha->req->ring_index - cnt); if (unlikely(vha->req->cnt < (req_cnt + 2))) { ql_dbg(ql_dbg_io, vha, 0x305a, "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n", vha->vp_idx, vha->req->ring_index, vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length); return -EAGAIN; } } vha->req->cnt -= req_cnt; return 0; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) { /* Adjust ring index. */ vha->req->ring_index++; if (vha->req->ring_index == vha->req->length) { vha->req->ring_index = 0; vha->req->ring_ptr = vha->req->ring; } else { vha->req->ring_ptr++; } return (cont_entry_t *)vha->req->ring_ptr; } /* ha->hardware_lock supposed to be held on entry */ static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; uint32_t h; h = ha->tgt.current_handle; /* always increment cmd handle */ do { ++h; if (h > DEFAULT_OUTSTANDING_COMMANDS) h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ if (h == ha->tgt.current_handle) { ql_dbg(ql_dbg_io, vha, 0x305b, "qla_target(%d): Ran out of " "empty cmd slots in ha %p\n", vha->vp_idx, ha); h = QLA_TGT_NULL_HANDLE; break; } } while ((h == QLA_TGT_NULL_HANDLE) || (h == QLA_TGT_SKIP_HANDLE) || (ha->tgt.cmds[h-1] != NULL)); if (h != QLA_TGT_NULL_HANDLE) ha->tgt.current_handle = h; return h; } /* ha->hardware_lock supposed to be held on entry */ static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, struct scsi_qla_host *vha) { uint32_t h; struct ctio7_to_24xx *pkt; struct qla_hw_data *ha = vha->hw; struct atio_from_isp *atio = &prm->cmd->atio; uint16_t temp; pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; prm->pkt = pkt; memset(pkt, 0, sizeof(*pkt)); pkt->entry_type = CTIO_TYPE7; pkt->entry_count = (uint8_t)prm->req_cnt; pkt->vp_index = vha->vp_idx; h = qlt_make_handle(vha); if (unlikely(h == QLA_TGT_NULL_HANDLE)) { /* * CTIO type 7 from the firmware doesn't provide a way to * know the initiator's LOOP ID, hence we can't find * the session and, so, the command. */ return -EAGAIN; } else ha->tgt.cmds[h-1] = prm->cmd; pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; pkt->nport_handle = prm->cmd->loop_id; pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; pkt->exchange_addr = atio->u.isp24.exchange_addr; pkt->u.status0.flags |= (atio->u.isp24.attr << 9); temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); pkt->u.status0.ox_id = cpu_to_le16(temp); pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); return 0; } /* * ha->hardware_lock supposed to be held on entry. We have already made sure * that there is sufficient amount of request entries to not drop it. */ static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha) { int cnt; uint32_t *dword_ptr; int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; /* Build continuation packets */ while (prm->seg_cnt > 0) { cont_a64_entry_t *cont_pkt64 = (cont_a64_entry_t *)qlt_get_req_pkt(vha); /* * Make sure that from cont_pkt64 none of * 64-bit specific fields used for 32-bit * addressing. Cast to (cont_entry_t *) for * that. */ memset(cont_pkt64, 0, sizeof(*cont_pkt64)); cont_pkt64->entry_count = 1; cont_pkt64->sys_define = 0; if (enable_64bit_addressing) { cont_pkt64->entry_type = CONTINUE_A64_TYPE; dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address; } else { cont_pkt64->entry_type = CONTINUE_TYPE; dword_ptr = (uint32_t *)&((cont_entry_t *) cont_pkt64)->dseg_0_address; } /* Load continuation entry data segments */ for (cnt = 0; cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; cnt++, prm->seg_cnt--) { *dword_ptr++ = cpu_to_le32(pci_dma_lo32 (sg_dma_address(prm->sg))); if (enable_64bit_addressing) { *dword_ptr++ = cpu_to_le32(pci_dma_hi32 (sg_dma_address (prm->sg))); } *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); prm->sg = sg_next(prm->sg); } } } /* * ha->hardware_lock supposed to be held on entry. We have already made sure * that there is sufficient amount of request entries to not drop it. */ static void qlt_load_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha) { int cnt; uint32_t *dword_ptr; int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); /* Setup packet address segment pointer */ dword_ptr = pkt24->u.status0.dseg_0_address; /* Set total data segment count */ if (prm->seg_cnt) pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); if (prm->seg_cnt == 0) { /* No data transfer */ *dword_ptr++ = 0; *dword_ptr = 0; return; } /* If scatter gather */ /* Load command entry data segments */ for (cnt = 0; (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; cnt++, prm->seg_cnt--) { *dword_ptr++ = cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); if (enable_64bit_addressing) { *dword_ptr++ = cpu_to_le32(pci_dma_hi32( sg_dma_address(prm->sg))); } *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); prm->sg = sg_next(prm->sg); } qlt_load_cont_data_segments(prm, vha); } static inline int qlt_has_data(struct qla_tgt_cmd *cmd) { return cmd->bufflen > 0; } /* * Called without ha->hardware_lock held */ static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, uint32_t *full_req_cnt) { struct qla_tgt *tgt = cmd->tgt; struct scsi_qla_host *vha = tgt->vha; struct qla_hw_data *ha = vha->hw; struct se_cmd *se_cmd = &cmd->se_cmd; prm->cmd = cmd; prm->tgt = tgt; prm->rq_result = scsi_status; prm->sense_buffer = &cmd->sense_buffer[0]; prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; prm->sg = NULL; prm->seg_cnt = -1; prm->req_cnt = 1; prm->add_status_pkt = 0; /* Send marker if required */ if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) return -EFAULT; if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { if (qlt_pci_map_calc_cnt(prm) != 0) return -EAGAIN; } *full_req_cnt = prm->req_cnt; if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { prm->residual = se_cmd->residual_count; ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); prm->rq_result |= SS_RESIDUAL_UNDER; } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { prm->residual = se_cmd->residual_count; ql_dbg(ql_dbg_io, vha, 0x305d, "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); prm->rq_result |= SS_RESIDUAL_OVER; } if (xmit_type & QLA_TGT_XMIT_STATUS) { /* * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be * ignored in *xmit_response() below */ if (qlt_has_data(cmd)) { if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || (IS_FWI2_CAPABLE(ha) && (prm->rq_result != 0))) { prm->add_status_pkt = 1; (*full_req_cnt)++; } } } return 0; } static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, struct qla_tgt_cmd *cmd, int sending_sense) { if (ha->tgt.enable_class_2) return 0; if (sending_sense) return cmd->conf_compl_supported; else return ha->tgt.enable_explicit_conf && cmd->conf_compl_supported; } #ifdef CONFIG_QLA_TGT_DEBUG_SRR /* * Original taken from the XFS code */ static unsigned long qlt_srr_random(void) { static int Inited; static unsigned long RandomValue; static DEFINE_SPINLOCK(lock); /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ register long rv; register long lo; register long hi; unsigned long flags; spin_lock_irqsave(&lock, flags); if (!Inited) { RandomValue = jiffies; Inited = 1; } rv = RandomValue; hi = rv / 127773; lo = rv % 127773; rv = 16807 * lo - 2836 * hi; if (rv <= 0) rv += 2147483647; RandomValue = rv; spin_unlock_irqrestore(&lock, flags); return rv; } static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) { #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) == 50) { *xmit_type &= ~QLA_TGT_XMIT_STATUS; ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); } #endif /* * It's currently not possible to simulate SRRs for FCP_WRITE without * a physical link layer failure, so don't even try here.. */ if (cmd->dma_data_direction != DMA_FROM_DEVICE) return; if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && ((qlt_srr_random() % 100) == 20)) { int i, leave = 0; unsigned int tot_len = 0; while (leave == 0) leave = qlt_srr_random() % cmd->sg_cnt; for (i = 0; i < leave; i++) tot_len += cmd->sg[i].length; ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, "Cutting cmd %p (tag %d) buffer" " tail to len %d, sg_cnt %d (cmd->bufflen %d," " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, cmd->bufflen, cmd->sg_cnt); cmd->bufflen = tot_len; cmd->sg_cnt = leave; } if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { unsigned int offset = qlt_srr_random() % cmd->bufflen; ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, "Cutting cmd %p (tag %d) buffer head " "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, cmd->bufflen); if (offset == 0) *xmit_type &= ~QLA_TGT_XMIT_DATA; else if (qlt_set_data_offset(cmd, offset)) { ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); } } } #else static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) {} #endif static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, struct qla_tgt_prm *prm) { prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, (uint32_t)sizeof(ctio->u.status1.sense_data)); ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { ctio->u.status0.flags |= cpu_to_le16( CTIO7_FLAGS_EXPLICIT_CONFORM | CTIO7_FLAGS_CONFORM_REQ); } ctio->u.status0.residual = cpu_to_le32(prm->residual); ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { int i; if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { if (prm->cmd->se_cmd.scsi_status != 0) { ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, "Skipping EXPLICIT_CONFORM and " "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " "non GOOD status\n"); goto skip_explict_conf; } ctio->u.status1.flags |= cpu_to_le16( CTIO7_FLAGS_EXPLICIT_CONFORM | CTIO7_FLAGS_CONFORM_REQ); } skip_explict_conf: ctio->u.status1.flags &= ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); ctio->u.status1.flags |= cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); ctio->u.status1.scsi_status |= cpu_to_le16(SS_SENSE_LEN_VALID); ctio->u.status1.sense_length = cpu_to_le16(prm->sense_buffer_len); for (i = 0; i < prm->sense_buffer_len/4; i++) ((uint32_t *)ctio->u.status1.sense_data)[i] = cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); #if 0 if (unlikely((prm->sense_buffer_len % 4) != 0)) { static int q; if (q < 10) { ql_dbg(ql_dbg_tgt, vha, 0xe04f, "qla_target(%d): %d bytes of sense " "lost", prm->tgt->ha->vp_idx, prm->sense_buffer_len % 4); q++; } } #endif } else { ctio->u.status1.flags &= ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); ctio->u.status1.flags |= cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); ctio->u.status1.sense_length = 0; memset(ctio->u.status1.sense_data, 0, sizeof(ctio->u.status1.sense_data)); } /* Sense with len > 24, is it possible ??? */ } /* diff */ static inline int qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) { /* * Uncomment when corresponding SCSI changes are done. * if (!sp->cmd->prot_chk) return 0; * */ switch (se_cmd->prot_op) { case TARGET_PROT_DOUT_INSERT: case TARGET_PROT_DIN_STRIP: if (ql2xenablehba_err_chk >= 1) return 1; break; case TARGET_PROT_DOUT_PASS: case TARGET_PROT_DIN_PASS: if (ql2xenablehba_err_chk >= 2) return 1; break; case TARGET_PROT_DIN_INSERT: case TARGET_PROT_DOUT_STRIP: return 1; default: break; } return 0; } /* * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command * */ static inline void qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) { uint32_t lba = 0xffffffff & se_cmd->t_task_lba; /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 * have been immplemented by TCM, before AppTag is avail. * Look for modesense_handlers[] */ ctx->app_tag = 0; ctx->app_tag_mask[0] = 0x0; ctx->app_tag_mask[1] = 0x0; switch (se_cmd->prot_type) { case TARGET_DIF_TYPE0_PROT: /* * No check for ql2xenablehba_err_chk, as it would be an * I/O error if hba tag generation is not done. */ ctx->ref_tag = cpu_to_le32(lba); if (!qlt_hba_err_chk_enabled(se_cmd)) break; /* enable ALL bytes of the ref tag */ ctx->ref_tag_mask[0] = 0xff; ctx->ref_tag_mask[1] = 0xff; ctx->ref_tag_mask[2] = 0xff; ctx->ref_tag_mask[3] = 0xff; break; /* * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and * 16 bit app tag. */ case TARGET_DIF_TYPE1_PROT: ctx->ref_tag = cpu_to_le32(lba); if (!qlt_hba_err_chk_enabled(se_cmd)) break; /* enable ALL bytes of the ref tag */ ctx->ref_tag_mask[0] = 0xff; ctx->ref_tag_mask[1] = 0xff; ctx->ref_tag_mask[2] = 0xff; ctx->ref_tag_mask[3] = 0xff; break; /* * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to * match LBA in CDB + N */ case TARGET_DIF_TYPE2_PROT: ctx->ref_tag = cpu_to_le32(lba); if (!qlt_hba_err_chk_enabled(se_cmd)) break; /* enable ALL bytes of the ref tag */ ctx->ref_tag_mask[0] = 0xff; ctx->ref_tag_mask[1] = 0xff; ctx->ref_tag_mask[2] = 0xff; ctx->ref_tag_mask[3] = 0xff; break; /* For Type 3 protection: 16 bit GUARD only */ case TARGET_DIF_TYPE3_PROT: ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; break; } } static inline int qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) { uint32_t *cur_dsd; uint32_t transfer_length = 0; uint32_t data_bytes; uint32_t dif_bytes; uint8_t bundling = 1; uint8_t *clr_ptr; struct crc_context *crc_ctx_pkt = NULL; struct qla_hw_data *ha; struct ctio_crc2_to_fw *pkt; dma_addr_t crc_ctx_dma; uint16_t fw_prot_opts = 0; struct qla_tgt_cmd *cmd = prm->cmd; struct se_cmd *se_cmd = &cmd->se_cmd; uint32_t h; struct atio_from_isp *atio = &prm->cmd->atio; uint16_t t16; ha = vha->hw; pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; prm->pkt = pkt; memset(pkt, 0, sizeof(*pkt)); ql_dbg(ql_dbg_tgt, vha, 0xe071, "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) bundling = 0; /* Compute dif len and adjust data len to incude protection */ data_bytes = cmd->bufflen; dif_bytes = (data_bytes / cmd->blk_sz) * 8; switch (se_cmd->prot_op) { case TARGET_PROT_DIN_INSERT: case TARGET_PROT_DOUT_STRIP: transfer_length = data_bytes; data_bytes += dif_bytes; break; case TARGET_PROT_DIN_STRIP: case TARGET_PROT_DOUT_INSERT: case TARGET_PROT_DIN_PASS: case TARGET_PROT_DOUT_PASS: transfer_length = data_bytes + dif_bytes; break; default: BUG(); break; } if (!qlt_hba_err_chk_enabled(se_cmd)) fw_prot_opts |= 0x10; /* Disable Guard tag checking */ /* HBA error checking enabled */ else if (IS_PI_UNINIT_CAPABLE(ha)) { if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) fw_prot_opts |= PO_DIS_VALD_APP_ESC; else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; } switch (se_cmd->prot_op) { case TARGET_PROT_DIN_INSERT: case TARGET_PROT_DOUT_INSERT: fw_prot_opts |= PO_MODE_DIF_INSERT; break; case TARGET_PROT_DIN_STRIP: case TARGET_PROT_DOUT_STRIP: fw_prot_opts |= PO_MODE_DIF_REMOVE; break; case TARGET_PROT_DIN_PASS: case TARGET_PROT_DOUT_PASS: fw_prot_opts |= PO_MODE_DIF_PASS; /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ break; default:/* Normal Request */ fw_prot_opts |= PO_MODE_DIF_PASS; break; } /* ---- PKT ---- */ /* Update entry type to indicate Command Type CRC_2 IOCB */ pkt->entry_type = CTIO_CRC2; pkt->entry_count = 1; pkt->vp_index = vha->vp_idx; h = qlt_make_handle(vha); if (unlikely(h == QLA_TGT_NULL_HANDLE)) { /* * CTIO type 7 from the firmware doesn't provide a way to * know the initiator's LOOP ID, hence we can't find * the session and, so, the command. */ return -EAGAIN; } else ha->tgt.cmds[h-1] = prm->cmd; pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; pkt->nport_handle = prm->cmd->loop_id; pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; pkt->exchange_addr = atio->u.isp24.exchange_addr; /* silence compile warning */ t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); pkt->ox_id = cpu_to_le16(t16); t16 = (atio->u.isp24.attr << 9); pkt->flags |= cpu_to_le16(t16); pkt->relative_offset = cpu_to_le32(prm->cmd->offset); /* Set transfer direction */ if (cmd->dma_data_direction == DMA_TO_DEVICE) pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN); else if (cmd->dma_data_direction == DMA_FROM_DEVICE) pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT); pkt->dseg_count = prm->tot_dsds; /* Fibre channel byte count */ pkt->transfer_length = cpu_to_le32(transfer_length); /* ----- CRC context -------- */ /* Allocate CRC context from global pool */ crc_ctx_pkt = cmd->ctx = dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); if (!crc_ctx_pkt) goto crc_queuing_error; /* Zero out CTX area. */ clr_ptr = (uint8_t *)crc_ctx_pkt; memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); /* Set handle */ crc_ctx_pkt->handle = pkt->handle; qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); pkt->crc_context_len = CRC_CONTEXT_LEN_FW; if (!bundling) { cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; } else { /* * Configure Bundling if we need to fetch interlaving * protection PCI accesses */ fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; } /* Finish the common fields of CRC pkt */ crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); crc_ctx_pkt->guard_seed = cpu_to_le16(0); /* Walks data segments */ pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR); if (!bundling && prm->prot_seg_cnt) { if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, prm->tot_dsds, cmd)) goto crc_queuing_error; } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, (prm->tot_dsds - prm->prot_seg_cnt), cmd)) goto crc_queuing_error; if (bundling && prm->prot_seg_cnt) { /* Walks dif segments */ pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, prm->prot_seg_cnt, cmd)) goto crc_queuing_error; } return QLA_SUCCESS; crc_queuing_error: /* Cleanup will be performed by the caller */ return QLA_FUNCTION_FAILED; } /* * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * * QLA_TGT_XMIT_STATUS for >= 24xx silicon */ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, uint8_t scsi_status) { struct scsi_qla_host *vha = cmd->vha; struct qla_hw_data *ha = vha->hw; struct ctio7_to_24xx *pkt; struct qla_tgt_prm prm; uint32_t full_req_cnt = 0; unsigned long flags = 0; int res; spin_lock_irqsave(&ha->hardware_lock, flags); if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { cmd->state = QLA_TGT_STATE_PROCESSED; if (cmd->sess->logout_completed) /* no need to terminate. FW already freed exchange. */ qlt_abort_cmd_on_host_reset(cmd->vha, cmd); else qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); return 0; } spin_unlock_irqrestore(&ha->hardware_lock, flags); memset(&prm, 0, sizeof(prm)); qlt_check_srr_debug(cmd, &xmit_type); ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", (xmit_type & QLA_TGT_XMIT_STATUS) ? 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, &cmd->se_cmd); res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, &full_req_cnt); if (unlikely(res != 0)) { return res; } spin_lock_irqsave(&ha->hardware_lock, flags); if (xmit_type == QLA_TGT_XMIT_STATUS) vha->tgt_counters.core_qla_snd_status++; else vha->tgt_counters.core_qla_que_buf++; if (!vha->flags.online || cmd->reset_count != ha->chip_reset) { /* * Either the port is not online or this request was from * previous life, just abort the processing. */ cmd->state = QLA_TGT_STATE_PROCESSED; qlt_abort_cmd_on_host_reset(cmd->vha, cmd); ql_dbg(ql_dbg_async, vha, 0xe101, "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n", vha->flags.online, qla2x00_reset_active(vha), cmd->reset_count, ha->chip_reset); spin_unlock_irqrestore(&ha->hardware_lock, flags); return 0; } /* Does F/W have an IOCBs for this request */ res = qlt_check_reserve_free_req(vha, full_req_cnt); if (unlikely(res)) goto out_unmap_unlock; if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) res = qlt_build_ctio_crc2_pkt(&prm, vha); else res = qlt_24xx_build_ctio_pkt(&prm, vha); if (unlikely(res != 0)) { vha->req->cnt += full_req_cnt; goto out_unmap_unlock; } pkt = (struct ctio7_to_24xx *)prm.pkt; if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_IN | CTIO7_FLAGS_STATUS_MODE_0); if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) qlt_load_data_segments(&prm, vha); if (prm.add_status_pkt == 0) { if (xmit_type & QLA_TGT_XMIT_STATUS) { pkt->u.status0.scsi_status = cpu_to_le16(prm.rq_result); pkt->u.status0.residual = cpu_to_le32(prm.residual); pkt->u.status0.flags |= cpu_to_le16( CTIO7_FLAGS_SEND_STATUS); if (qlt_need_explicit_conf(ha, cmd, 0)) { pkt->u.status0.flags |= cpu_to_le16( CTIO7_FLAGS_EXPLICIT_CONFORM | CTIO7_FLAGS_CONFORM_REQ); } } } else { /* * We have already made sure that there is sufficient * amount of request entries to not drop HW lock in * req_pkt(). */ struct ctio7_to_24xx *ctio = (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); ql_dbg(ql_dbg_io, vha, 0x305e, "Building additional status packet 0x%p.\n", ctio); /* * T10Dif: ctio_crc2_to_fw overlay ontop of * ctio7_to_24xx */ memcpy(ctio, pkt, sizeof(*ctio)); /* reset back to CTIO7 */ ctio->entry_count = 1; ctio->entry_type = CTIO_TYPE7; ctio->dseg_count = 0; ctio->u.status1.flags &= ~cpu_to_le16( CTIO7_FLAGS_DATA_IN); /* Real finish is ctio_m1's finish */ pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; pkt->u.status0.flags |= cpu_to_le16( CTIO7_FLAGS_DONT_RET_CTIO); /* qlt_24xx_init_ctio_to_isp will correct * all neccessary fields that's part of CTIO7. * There should be no residual of CTIO-CRC2 data. */ qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, &prm); pr_debug("Status CTIO7: %p\n", ctio); } } else qlt_24xx_init_ctio_to_isp(pkt, &prm); cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ cmd->cmd_sent_to_fw = 1; /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); spin_unlock_irqrestore(&ha->hardware_lock, flags); return 0; out_unmap_unlock: qlt_unmap_sg(vha, cmd); spin_unlock_irqrestore(&ha->hardware_lock, flags); return res; } EXPORT_SYMBOL(qlt_xmit_response); int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) { struct ctio7_to_24xx *pkt; struct scsi_qla_host *vha = cmd->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = cmd->tgt; struct qla_tgt_prm prm; unsigned long flags; int res = 0; memset(&prm, 0, sizeof(prm)); prm.cmd = cmd; prm.tgt = tgt; prm.sg = NULL; prm.req_cnt = 1; /* Send marker if required */ if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) return -EIO; /* Calculate number of entries and segments required */ if (qlt_pci_map_calc_cnt(&prm) != 0) return -EAGAIN; spin_lock_irqsave(&ha->hardware_lock, flags); if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) || (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) { /* * Either the port is not online or this request was from * previous life, just abort the processing. */ cmd->state = QLA_TGT_STATE_NEED_DATA; qlt_abort_cmd_on_host_reset(cmd->vha, cmd); ql_dbg(ql_dbg_async, vha, 0xe102, "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n", vha->flags.online, qla2x00_reset_active(vha), cmd->reset_count, ha->chip_reset); spin_unlock_irqrestore(&ha->hardware_lock, flags); return 0; } /* Does F/W have an IOCBs for this request */ res = qlt_check_reserve_free_req(vha, prm.req_cnt); if (res != 0) goto out_unlock_free_unmap; if (cmd->se_cmd.prot_op) res = qlt_build_ctio_crc2_pkt(&prm, vha); else res = qlt_24xx_build_ctio_pkt(&prm, vha); if (unlikely(res != 0)) { vha->req->cnt += prm.req_cnt; goto out_unlock_free_unmap; } pkt = (struct ctio7_to_24xx *)prm.pkt; pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT | CTIO7_FLAGS_STATUS_MODE_0); if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) qlt_load_data_segments(&prm, vha); cmd->state = QLA_TGT_STATE_NEED_DATA; cmd->cmd_sent_to_fw = 1; /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); spin_unlock_irqrestore(&ha->hardware_lock, flags); return res; out_unlock_free_unmap: qlt_unmap_sg(vha, cmd); spin_unlock_irqrestore(&ha->hardware_lock, flags); return res; } EXPORT_SYMBOL(qlt_rdy_to_xfer); /* * Checks the guard or meta-data for the type of error * detected by the HBA. */ static inline int qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, struct ctio_crc_from_fw *sts) { uint8_t *ap = &sts->actual_dif[0]; uint8_t *ep = &sts->expected_dif[0]; uint32_t e_ref_tag, a_ref_tag; uint16_t e_app_tag, a_app_tag; uint16_t e_guard, a_guard; uint64_t lba = cmd->se_cmd.t_task_lba; a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); ql_dbg(ql_dbg_tgt, vha, 0xe075, "iocb(s) %p Returned STATUS.\n", sts); ql_dbg(ql_dbg_tgt, vha, 0xf075, "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n", cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); /* * Ignore sector if: * For type 3: ref & app tag is all 'f's * For type 0,1,2: app tag is all 'f's */ if ((a_app_tag == 0xffff) && ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || (a_ref_tag == 0xffffffff))) { uint32_t blocks_done; /* 2TB boundary case covered automatically with this */ blocks_done = e_ref_tag - (uint32_t)lba + 1; cmd->se_cmd.bad_sector = e_ref_tag; cmd->se_cmd.pi_err = 0; ql_dbg(ql_dbg_tgt, vha, 0xf074, "need to return scsi good\n"); /* Update protection tag */ if (cmd->prot_sg_cnt) { uint32_t i, k = 0, num_ent; struct scatterlist *sg, *sgl; sgl = cmd->prot_sg; /* Patch the corresponding protection tags */ for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { num_ent = sg_dma_len(sg) / 8; if (k + num_ent < blocks_done) { k += num_ent; continue; } k = blocks_done; break; } if (k != blocks_done) { ql_log(ql_log_warn, vha, 0xf076, "unexpected tag values tag:lba=%u:%llu)\n", e_ref_tag, (unsigned long long)lba); goto out; } #if 0 struct sd_dif_tuple *spt; /* TODO: * This section came from initiator. Is it valid here? * should ulp be override with actual val??? */ spt = page_address(sg_page(sg)) + sg->offset; spt += j; spt->app_tag = 0xffff; if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) spt->ref_tag = 0xffffffff; #endif } return 0; } /* check guard */ if (e_guard != a_guard) { cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; ql_log(ql_log_warn, vha, 0xe076, "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n", cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard, cmd); goto out; } /* check ref tag */ if (e_ref_tag != a_ref_tag) { cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; cmd->se_cmd.bad_sector = e_ref_tag; ql_log(ql_log_warn, vha, 0xe077, "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n", cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard, cmd); goto out; } /* check appl tag */ if (e_app_tag != a_app_tag) { cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; ql_log(ql_log_warn, vha, 0xe078, "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n", cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard, cmd); goto out; } out: return 1; } /* If hardware_lock held on entry, might drop it, then reaquire */ /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *ntfy) { struct nack_to_isp *nack; struct qla_hw_data *ha = vha->hw; request_t *pkt; int ret = 0; ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c, "Sending TERM ELS CTIO (ha=%p)\n", ha); pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); if (pkt == NULL) { ql_dbg(ql_dbg_tgt, vha, 0xe080, "qla_target(%d): %s failed: unable to allocate " "request packet\n", vha->vp_idx, __func__); return -ENOMEM; } pkt->entry_type = NOTIFY_ACK_TYPE; pkt->entry_count = 1; pkt->handle = QLA_TGT_SKIP_HANDLE; nack = (struct nack_to_isp *)pkt; nack->ox_id = ntfy->ox_id; nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { nack->u.isp24.flags = ntfy->u.isp24.flags & __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); } /* terminate */ nack->u.isp24.flags |= __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE); nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; nack->u.isp24.status = ntfy->u.isp24.status; nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; qla2x00_start_iocbs(vha, vha->req); return ret; } static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *imm, int ha_locked) { unsigned long flags = 0; int rc; if (qlt_issue_marker(vha, ha_locked) < 0) return; if (ha_locked) { rc = __qlt_send_term_imm_notif(vha, imm); #if 0 /* Todo */ if (rc == -ENOMEM) qlt_alloc_qfull_cmd(vha, imm, 0, 0); #endif goto done; } spin_lock_irqsave(&vha->hw->hardware_lock, flags); rc = __qlt_send_term_imm_notif(vha, imm); #if 0 /* Todo */ if (rc == -ENOMEM) qlt_alloc_qfull_cmd(vha, imm, 0, 0); #endif done: if (!ha_locked) spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); } /* If hardware_lock held on entry, might drop it, then reaquire */ /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ static int __qlt_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, struct atio_from_isp *atio) { struct ctio7_to_24xx *ctio24; struct qla_hw_data *ha = vha->hw; request_t *pkt; int ret = 0; uint16_t temp; ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); if (pkt == NULL) { ql_dbg(ql_dbg_tgt, vha, 0xe050, "qla_target(%d): %s failed: unable to allocate " "request packet\n", vha->vp_idx, __func__); return -ENOMEM; } if (cmd != NULL) { if (cmd->state < QLA_TGT_STATE_PROCESSED) { ql_dbg(ql_dbg_tgt, vha, 0xe051, "qla_target(%d): Terminating cmd %p with " "incorrect state %d\n", vha->vp_idx, cmd, cmd->state); } else ret = 1; } vha->tgt_counters.num_term_xchg_sent++; pkt->entry_count = 1; pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; ctio24 = (struct ctio7_to_24xx *)pkt; ctio24->entry_type = CTIO_TYPE7; ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED; ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); ctio24->vp_index = vha->vp_idx; ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; ctio24->exchange_addr = atio->u.isp24.exchange_addr; ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE); temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); ctio24->u.status1.ox_id = cpu_to_le16(temp); /* Most likely, it isn't needed */ ctio24->u.status1.residual = get_unaligned((uint32_t *) &atio->u.isp24.fcp_cmnd.add_cdb[ atio->u.isp24.fcp_cmnd.add_cdb_len]); if (ctio24->u.status1.residual != 0) ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); return ret; } static void qlt_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort) { unsigned long flags = 0; int rc; if (qlt_issue_marker(vha, ha_locked) < 0) return; if (ha_locked) { rc = __qlt_send_term_exchange(vha, cmd, atio); if (rc == -ENOMEM) qlt_alloc_qfull_cmd(vha, atio, 0, 0); goto done; } spin_lock_irqsave(&vha->hw->hardware_lock, flags); rc = __qlt_send_term_exchange(vha, cmd, atio); if (rc == -ENOMEM) qlt_alloc_qfull_cmd(vha, atio, 0, 0); done: if (cmd && !ul_abort && !cmd->aborted) { if (cmd->sg_mapped) qlt_unmap_sg(vha, cmd); vha->hw->tgt.tgt_ops->free_cmd(cmd); } if (!ha_locked) spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); return; } static void qlt_init_term_exchange(struct scsi_qla_host *vha) { struct list_head free_list; struct qla_tgt_cmd *cmd, *tcmd; vha->hw->tgt.leak_exchg_thresh_hold = (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; cmd = tcmd = NULL; if (!list_empty(&vha->hw->tgt.q_full_list)) { INIT_LIST_HEAD(&free_list); list_splice_init(&vha->hw->tgt.q_full_list, &free_list); list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { list_del(&cmd->cmd_list); /* This cmd was never sent to TCM. There is no need * to schedule free or call free_cmd */ qlt_free_cmd(cmd); vha->hw->tgt.num_qfull_cmds_alloc--; } } vha->hw->tgt.num_qfull_cmds_dropped = 0; } static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) { uint32_t total_leaked; total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; if (vha->hw->tgt.leak_exchg_thresh_hold && (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { ql_dbg(ql_dbg_tgt, vha, 0xe079, "Chip reset due to exchange starvation: %d/%d.\n", total_leaked, vha->hw->cur_fw_xcb_count); if (IS_P3P_TYPE(vha->hw)) set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); else set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); qla2xxx_wake_dpc(vha); } } int qlt_abort_cmd(struct qla_tgt_cmd *cmd) { struct qla_tgt *tgt = cmd->tgt; struct scsi_qla_host *vha = tgt->vha; struct se_cmd *se_cmd = &cmd->se_cmd; unsigned long flags; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, "qla_target(%d): terminating exchange for aborted cmd=%p " "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, se_cmd->tag); spin_lock_irqsave(&cmd->cmd_lock, flags); if (cmd->aborted) { if (cmd->sg_mapped) qlt_unmap_sg(vha, cmd); spin_unlock_irqrestore(&cmd->cmd_lock, flags); /* * It's normal to see 2 calls in this path: * 1) XFER Rdy completion + CMD_T_ABORT * 2) TCM TMR - drain_state_list */ ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff, "multiple abort. %p transport_state %x, t_state %x," " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state, cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags); return EIO; } cmd->aborted = 1; cmd->cmd_flags |= BIT_6; spin_unlock_irqrestore(&cmd->cmd_lock, flags); qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1); return 0; } EXPORT_SYMBOL(qlt_abort_cmd); void qlt_free_cmd(struct qla_tgt_cmd *cmd) { struct qla_tgt_sess *sess = cmd->sess; ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, "%s: se_cmd[%p] ox_id %04x\n", __func__, &cmd->se_cmd, be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); BUG_ON(cmd->cmd_in_wq); if (cmd->sg_mapped) qlt_unmap_sg(cmd->vha, cmd); if (!cmd->q_full) qlt_decr_num_pend_cmds(cmd->vha); BUG_ON(cmd->sg_mapped); cmd->jiffies_at_free = get_jiffies_64(); if (unlikely(cmd->free_sg)) kfree(cmd->sg); if (!sess || !sess->se_sess) { WARN_ON(1); return; } cmd->jiffies_at_free = get_jiffies_64(); percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); } EXPORT_SYMBOL(qlt_free_cmd); /* ha->hardware_lock supposed to be held on entry */ static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, void *ctio) { struct qla_tgt_srr_ctio *sc; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_srr_imm *imm; tgt->ctio_srr_id++; cmd->cmd_flags |= BIT_15; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); if (!ctio) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, "qla_target(%d): SRR CTIO, but ctio is NULL\n", vha->vp_idx); return -EINVAL; } sc = kzalloc(sizeof(*sc), GFP_ATOMIC); if (sc != NULL) { sc->cmd = cmd; /* IRQ is already OFF */ spin_lock(&tgt->srr_lock); sc->srr_id = tgt->ctio_srr_id; list_add_tail(&sc->srr_list_entry, &tgt->srr_ctio_list); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); if (tgt->imm_srr_id == tgt->ctio_srr_id) { int found = 0; list_for_each_entry(imm, &tgt->srr_imm_list, srr_list_entry) { if (imm->srr_id == sc->srr_id) { found = 1; break; } } if (found) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, "Scheduling srr work\n"); schedule_work(&tgt->srr_work); } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, "qla_target(%d): imm_srr_id " "== ctio_srr_id (%d), but there is no " "corresponding SRR IMM, deleting CTIO " "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, sc); list_del(&sc->srr_list_entry); spin_unlock(&tgt->srr_lock); kfree(sc); return -EINVAL; } } spin_unlock(&tgt->srr_lock); } else { struct qla_tgt_srr_imm *ti; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, "qla_target(%d): Unable to allocate SRR CTIO entry\n", vha->vp_idx); spin_lock(&tgt->srr_lock); list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, srr_list_entry) { if (imm->srr_id == tgt->ctio_srr_id) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, "IMM SRR %p deleted (id %d)\n", imm, imm->srr_id); list_del(&imm->srr_list_entry); qlt_reject_free_srr_imm(vha, imm, 1); } } spin_unlock(&tgt->srr_lock); return -ENOMEM; } return 0; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, struct qla_tgt_cmd *cmd, uint32_t status) { int term = 0; if (ctio != NULL) { struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; term = !(c->flags & cpu_to_le16(OF_TERM_EXCH)); } else term = 1; if (term) qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); return term; } /* ha->hardware_lock supposed to be held on entry */ static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, uint32_t handle) { struct qla_hw_data *ha = vha->hw; handle--; if (ha->tgt.cmds[handle] != NULL) { struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; ha->tgt.cmds[handle] = NULL; return cmd; } else return NULL; } /* ha->hardware_lock supposed to be held on entry */ static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, uint32_t handle, void *ctio) { struct qla_tgt_cmd *cmd = NULL; /* Clear out internal marks */ handle &= ~(CTIO_COMPLETION_HANDLE_MARK | CTIO_INTERMEDIATE_HANDLE_MARK); if (handle != QLA_TGT_NULL_HANDLE) { if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) return NULL; /* handle-1 is actually used */ if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { ql_dbg(ql_dbg_tgt, vha, 0xe052, "qla_target(%d): Wrong handle %x received\n", vha->vp_idx, handle); return NULL; } cmd = qlt_get_cmd(vha, handle); if (unlikely(cmd == NULL)) { ql_dbg(ql_dbg_tgt, vha, 0xe053, "qla_target(%d): Suspicious: unable to " "find the command with handle %x\n", vha->vp_idx, handle); return NULL; } } else if (ctio != NULL) { /* We can't get loop ID from CTIO7 */ ql_dbg(ql_dbg_tgt, vha, 0xe054, "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " "support NULL handles\n", vha->vp_idx); return NULL; } return cmd; } /* hardware_lock should be held by caller. */ static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) { struct qla_hw_data *ha = vha->hw; uint32_t handle; if (cmd->sg_mapped) qlt_unmap_sg(vha, cmd); handle = qlt_make_handle(vha); /* TODO: fix debug message type and ids. */ if (cmd->state == QLA_TGT_STATE_PROCESSED) { ql_dbg(ql_dbg_io, vha, 0xff00, "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { cmd->write_data_transferred = 0; cmd->state = QLA_TGT_STATE_DATA_IN; ql_dbg(ql_dbg_io, vha, 0xff01, "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); ha->tgt.tgt_ops->handle_data(cmd); return; } else { ql_dbg(ql_dbg_io, vha, 0xff03, "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, cmd->state); dump_stack(); } cmd->cmd_flags |= BIT_17; ha->tgt.tgt_ops->free_cmd(cmd); } void qlt_host_reset_handler(struct qla_hw_data *ha) { struct qla_tgt_cmd *cmd; unsigned long flags; scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); scsi_qla_host_t *vha = NULL; struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; uint32_t i; if (!base_vha->hw->tgt.tgt_ops) return; if (!tgt || qla_ini_mode_enabled(base_vha)) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, "Target mode disabled\n"); return; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", base_vha->dpc_flags); spin_lock_irqsave(&ha->hardware_lock, flags); for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { cmd = qlt_get_cmd(base_vha, i); if (!cmd) continue; /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ vha = cmd->vha; qlt_abort_cmd_on_host_reset(vha, cmd); } spin_unlock_irqrestore(&ha->hardware_lock, flags); } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, uint32_t status, void *ctio) { struct qla_hw_data *ha = vha->hw; struct se_cmd *se_cmd; struct qla_tgt_cmd *cmd; if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { /* That could happen only in case of an error/reset/abort */ if (status != CTIO_SUCCESS) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, "Intermediate CTIO received" " (status %x)\n", status); } return; } cmd = qlt_ctio_to_cmd(vha, handle, ctio); if (cmd == NULL) return; se_cmd = &cmd->se_cmd; cmd->cmd_sent_to_fw = 0; qlt_unmap_sg(vha, cmd); if (unlikely(status != CTIO_SUCCESS)) { switch (status & 0xFFFF) { case CTIO_LIP_RESET: case CTIO_TARGET_RESET: case CTIO_ABORTED: /* driver request abort via Terminate exchange */ case CTIO_TIMEOUT: case CTIO_INVALID_RX_ID: /* They are OK */ ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, "qla_target(%d): CTIO with " "status %#x received, state %x, se_cmd %p, " "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, status, cmd->state, se_cmd); break; case CTIO_PORT_LOGGED_OUT: case CTIO_PORT_UNAVAILABLE: { int logged_out = (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, "qla_target(%d): CTIO with %s status %x " "received (state %x, se_cmd %p)\n", vha->vp_idx, logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE", status, cmd->state, se_cmd); if (logged_out && cmd->sess) { /* * Session is already logged out, but we need * to notify initiator, who's not aware of this */ cmd->sess->logout_on_delete = 0; cmd->sess->send_els_logo = 1; qlt_schedule_sess_for_deletion(cmd->sess, true); } break; } case CTIO_SRR_RECEIVED: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, "qla_target(%d): CTIO with SRR_RECEIVED" " status %x received (state %x, se_cmd %p)\n", vha->vp_idx, status, cmd->state, se_cmd); if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) break; else return; case CTIO_DIF_ERROR: { struct ctio_crc_from_fw *crc = (struct ctio_crc_from_fw *)ctio; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", vha->vp_idx, status, cmd->state, se_cmd, *((u64 *)&crc->actual_dif[0]), *((u64 *)&crc->expected_dif[0])); if (qlt_handle_dif_error(vha, cmd, ctio)) { if (cmd->state == QLA_TGT_STATE_NEED_DATA) { /* scsi Write/xfer rdy complete */ goto skip_term; } else { /* scsi read/xmit respond complete * call handle dif to send scsi status * rather than terminate exchange. */ cmd->state = QLA_TGT_STATE_PROCESSED; ha->tgt.tgt_ops->handle_dif_err(cmd); return; } } else { /* Need to generate a SCSI good completion. * because FW did not send scsi status. */ status = 0; goto skip_term; } break; } default: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", vha->vp_idx, status, cmd->state, se_cmd); break; } /* "cmd->aborted" means * cmd is already aborted/terminated, we don't * need to terminate again. The exchange is already * cleaned up/freed at FW level. Just cleanup at driver * level. */ if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && (!cmd->aborted)) { cmd->cmd_flags |= BIT_13; if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) return; } } skip_term: if (cmd->state == QLA_TGT_STATE_PROCESSED) { cmd->cmd_flags |= BIT_12; } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { cmd->state = QLA_TGT_STATE_DATA_IN; if (status == CTIO_SUCCESS) cmd->write_data_transferred = 1; ha->tgt.tgt_ops->handle_data(cmd); return; } else if (cmd->aborted) { cmd->cmd_flags |= BIT_18; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); } else { cmd->cmd_flags |= BIT_19; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, "qla_target(%d): A command in state (%d) should " "not return a CTIO complete\n", vha->vp_idx, cmd->state); } if (unlikely(status != CTIO_SUCCESS) && !cmd->aborted) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); dump_stack(); } ha->tgt.tgt_ops->free_cmd(cmd); } static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, uint8_t task_codes) { int fcp_task_attr; switch (task_codes) { case ATIO_SIMPLE_QUEUE: fcp_task_attr = TCM_SIMPLE_TAG; break; case ATIO_HEAD_OF_QUEUE: fcp_task_attr = TCM_HEAD_TAG; break; case ATIO_ORDERED_QUEUE: fcp_task_attr = TCM_ORDERED_TAG; break; case ATIO_ACA_QUEUE: fcp_task_attr = TCM_ACA_TAG; break; case ATIO_UNTAGGED: fcp_task_attr = TCM_SIMPLE_TAG; break; default: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, "qla_target: unknown task code %x, use ORDERED instead\n", task_codes); fcp_task_attr = TCM_ORDERED_TAG; break; } return fcp_task_attr; } static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, uint8_t *); /* * Process context for I/O path into tcm_qla2xxx code */ static void __qlt_do_work(struct qla_tgt_cmd *cmd) { scsi_qla_host_t *vha = cmd->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_sess *sess = cmd->sess; struct atio_from_isp *atio = &cmd->atio; unsigned char *cdb; unsigned long flags; uint32_t data_length; int ret, fcp_task_attr, data_dir, bidi = 0; cmd->cmd_in_wq = 0; cmd->cmd_flags |= BIT_1; if (tgt->tgt_stop) goto out_term; if (cmd->aborted) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082, "cmd with tag %u is aborted\n", cmd->atio.u.isp24.exchange_addr); goto out_term; } spin_lock_init(&cmd->cmd_lock); cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; cmd->se_cmd.tag = atio->u.isp24.exchange_addr; cmd->unpacked_lun = scsilun_to_int( (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); if (atio->u.isp24.fcp_cmnd.rddata && atio->u.isp24.fcp_cmnd.wrdata) { bidi = 1; data_dir = DMA_TO_DEVICE; } else if (atio->u.isp24.fcp_cmnd.rddata) data_dir = DMA_FROM_DEVICE; else if (atio->u.isp24.fcp_cmnd.wrdata) data_dir = DMA_TO_DEVICE; else data_dir = DMA_NONE; fcp_task_attr = qlt_get_fcp_task_attr(vha, atio->u.isp24.fcp_cmnd.task_attr); data_length = be32_to_cpu(get_unaligned((uint32_t *) &atio->u.isp24.fcp_cmnd.add_cdb[ atio->u.isp24.fcp_cmnd.add_cdb_len])); ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, fcp_task_attr, data_dir, bidi); if (ret != 0) goto out_term; /* * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( */ spin_lock_irqsave(&ha->tgt.sess_lock, flags); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return; out_term: ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); /* * cmd has not sent to target yet, so pass NULL as the second * argument to qlt_send_term_exchange() and free the memory here. */ cmd->cmd_flags |= BIT_2; spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0); qlt_decr_num_pend_cmds(vha); percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); spin_unlock_irqrestore(&ha->hardware_lock, flags); spin_lock_irqsave(&ha->tgt.sess_lock, flags); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); } static void qlt_do_work(struct work_struct *work) { struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); scsi_qla_host_t *vha = cmd->vha; unsigned long flags; spin_lock_irqsave(&vha->cmd_list_lock, flags); list_del(&cmd->cmd_list); spin_unlock_irqrestore(&vha->cmd_list_lock, flags); __qlt_do_work(cmd); } static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, struct qla_tgt_sess *sess, struct atio_from_isp *atio) { struct se_session *se_sess = sess->se_sess; struct qla_tgt_cmd *cmd; int tag; tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); if (tag < 0) return NULL; cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; memset(cmd, 0, sizeof(struct qla_tgt_cmd)); memcpy(&cmd->atio, atio, sizeof(*atio)); cmd->state = QLA_TGT_STATE_NEW; cmd->tgt = vha->vha_tgt.qla_tgt; qlt_incr_num_pend_cmds(vha); cmd->vha = vha; cmd->se_cmd.map_tag = tag; cmd->sess = sess; cmd->loop_id = sess->loop_id; cmd->conf_compl_supported = sess->conf_compl_supported; cmd->cmd_flags = 0; cmd->jiffies_at_alloc = get_jiffies_64(); cmd->reset_count = vha->hw->chip_reset; return cmd; } static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, uint16_t); static void qlt_create_sess_from_atio(struct work_struct *work) { struct qla_tgt_sess_op *op = container_of(work, struct qla_tgt_sess_op, work); scsi_qla_host_t *vha = op->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; struct qla_tgt_cmd *cmd; unsigned long flags; uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; spin_lock_irqsave(&vha->cmd_list_lock, flags); list_del(&op->cmd_list); spin_unlock_irqrestore(&vha->cmd_list_lock, flags); if (op->aborted) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083, "sess_op with tag %u is aborted\n", op->atio.u.isp24.exchange_addr); goto out_term; } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, "qla_target(%d): Unable to find wwn login" " (s_id %x:%x:%x), trying to create it manually\n", vha->vp_idx, s_id[0], s_id[1], s_id[2]); if (op->atio.u.raw.entry_count > 1) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, "Dropping multy entry atio %p\n", &op->atio); goto out_term; } sess = qlt_make_local_sess(vha, s_id); /* sess has an extra creation ref. */ if (!sess) goto out_term; /* * Now obtain a pre-allocated session tag using the original op->atio * packet header, and dispatch into __qlt_do_work() using the existing * process context. */ cmd = qlt_get_tag(vha, sess, &op->atio); if (!cmd) { spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->hardware_lock, flags); kfree(op); return; } /* * __qlt_do_work() will call qlt_put_sess() to release * the extra reference taken above by qlt_make_local_sess() */ __qlt_do_work(cmd); kfree(op); return; out_term: spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); kfree(op); } /* ha->hardware_lock supposed to be held on entry */ static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, struct atio_from_isp *atio) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_sess *sess; struct qla_tgt_cmd *cmd; if (unlikely(tgt->tgt_stop)) { ql_dbg(ql_dbg_io, vha, 0x3061, "New command while device %p is shutting down\n", tgt); return -EFAULT; } sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); if (unlikely(!sess)) { struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), GFP_ATOMIC); if (!op) return -ENOMEM; memcpy(&op->atio, atio, sizeof(*atio)); op->vha = vha; spin_lock(&vha->cmd_list_lock); list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list); spin_unlock(&vha->cmd_list_lock); INIT_WORK(&op->work, qlt_create_sess_from_atio); queue_work(qla_tgt_wq, &op->work); return 0; } /* Another WWN used to have our s_id. Our PLOGI scheduled its * session deletion, but it's still in sess_del_work wq */ if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { ql_dbg(ql_dbg_io, vha, 0x3061, "New command while old session %p is being deleted\n", sess); return -EFAULT; } /* * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. */ kref_get(&sess->sess_kref); cmd = qlt_get_tag(vha, sess, atio); if (!cmd) { ql_dbg(ql_dbg_io, vha, 0x3062, "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); qlt_put_sess(sess); return -ENOMEM; } cmd->cmd_in_wq = 1; cmd->cmd_flags |= BIT_0; cmd->se_cmd.cpuid = ha->msix_count ? ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND; spin_lock(&vha->cmd_list_lock); list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); spin_unlock(&vha->cmd_list_lock); INIT_WORK(&cmd->work, qlt_do_work); if (ha->msix_count) { if (cmd->atio.u.isp24.fcp_cmnd.rddata) queue_work_on(smp_processor_id(), qla_tgt_wq, &cmd->work); else queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work); } else { queue_work(qla_tgt_wq, &cmd->work); } return 0; } /* ha->hardware_lock supposed to be held on entry */ static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, int fn, void *iocb, int flags) { struct scsi_qla_host *vha = sess->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt_mgmt_cmd *mcmd; struct atio_from_isp *a = (struct atio_from_isp *)iocb; int res; uint8_t tmr_func; mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); if (!mcmd) { ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, "qla_target(%d): Allocation of management " "command failed, some commands and their data could " "leak\n", vha->vp_idx); return -ENOMEM; } memset(mcmd, 0, sizeof(*mcmd)); mcmd->sess = sess; if (iocb) { memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, sizeof(mcmd->orig_iocb.imm_ntfy)); } mcmd->tmr_func = fn; mcmd->flags = flags; mcmd->reset_count = vha->hw->chip_reset; switch (fn) { case QLA_TGT_CLEAR_ACA: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); tmr_func = TMR_CLEAR_ACA; break; case QLA_TGT_TARGET_RESET: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, "qla_target(%d): TARGET_RESET received\n", sess->vha->vp_idx); tmr_func = TMR_TARGET_WARM_RESET; break; case QLA_TGT_LUN_RESET: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); tmr_func = TMR_LUN_RESET; abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); break; case QLA_TGT_CLEAR_TS: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); tmr_func = TMR_CLEAR_TASK_SET; break; case QLA_TGT_ABORT_TS: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); tmr_func = TMR_ABORT_TASK_SET; break; #if 0 case QLA_TGT_ABORT_ALL: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, "qla_target(%d): Doing ABORT_ALL_TASKS\n", sess->vha->vp_idx); tmr_func = 0; break; case QLA_TGT_ABORT_ALL_SESS: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", sess->vha->vp_idx); tmr_func = 0; break; case QLA_TGT_NEXUS_LOSS_SESS: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, "qla_target(%d): Doing NEXUS_LOSS_SESS\n", sess->vha->vp_idx); tmr_func = 0; break; case QLA_TGT_NEXUS_LOSS: ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); tmr_func = 0; break; #endif default: ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, "qla_target(%d): Unknown task mgmt fn 0x%x\n", sess->vha->vp_idx, fn); mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); return -ENOSYS; } res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); if (res != 0) { ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", sess->vha->vp_idx, res); mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); return -EFAULT; } return 0; } /* ha->hardware_lock supposed to be held on entry */ static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) { struct atio_from_isp *a = (struct atio_from_isp *)iocb; struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt; struct qla_tgt_sess *sess; uint32_t lun, unpacked_lun; int fn; unsigned long flags; tgt = vha->vha_tgt.qla_tgt; lun = a->u.isp24.fcp_cmnd.lun; fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; spin_lock_irqsave(&ha->tgt.sess_lock, flags); sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, a->u.isp24.fcp_hdr.s_id); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); if (!sess) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, "qla_target(%d): task mgmt fn 0x%x for " "non-existant session\n", vha->vp_idx, fn); return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, sizeof(struct atio_from_isp)); } if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) return -EFAULT; return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); } /* ha->hardware_lock supposed to be held on entry */ static int __qlt_abort_task(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) { struct atio_from_isp *a = (struct atio_from_isp *)iocb; struct qla_hw_data *ha = vha->hw; struct qla_tgt_mgmt_cmd *mcmd; uint32_t lun, unpacked_lun; int rc; mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); if (mcmd == NULL) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, "qla_target(%d): %s: Allocation of ABORT cmd failed\n", vha->vp_idx, __func__); return -ENOMEM; } memset(mcmd, 0, sizeof(*mcmd)); mcmd->sess = sess; memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, sizeof(mcmd->orig_iocb.imm_ntfy)); lun = a->u.isp24.fcp_cmnd.lun; unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); mcmd->reset_count = vha->hw->chip_reset; rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, le16_to_cpu(iocb->u.isp2x.seq_id)); if (rc != 0) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", vha->vp_idx, rc); mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); return -EFAULT; } return 0; } /* ha->hardware_lock supposed to be held on entry */ static int qlt_abort_task(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *iocb) { struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; int loop_id; unsigned long flags; loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); spin_lock_irqsave(&ha->tgt.sess_lock, flags); sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); if (sess == NULL) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, "qla_target(%d): task abort for unexisting " "session\n", vha->vp_idx); return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); } return __qlt_abort_task(vha, iocb, sess); } void qlt_logo_completion_handler(fc_port_t *fcport, int rc) { if (fcport->tgt_session) { if (rc != MBS_COMMAND_COMPLETE) { ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093, "%s: se_sess %p / sess %p from" " port %8phC loop_id %#04x s_id %02x:%02x:%02x" " LOGO failed: %#x\n", __func__, fcport->tgt_session->se_sess, fcport->tgt_session, fcport->port_name, fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa, rc); } fcport->tgt_session->logout_completed = 1; } } /* * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) * * Schedules sessions with matching port_id/loop_id but different wwn for * deletion. Returns existing session with matching wwn if present. * Null otherwise. */ static struct qla_tgt_sess * qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn, port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess) { struct qla_tgt_sess *sess = NULL, *other_sess; uint64_t other_wwn; *conflict_sess = NULL; list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) { other_wwn = wwn_to_u64(other_sess->port_name); if (wwn == other_wwn) { WARN_ON(sess); sess = other_sess; continue; } /* find other sess with nport_id collision */ if (port_id.b24 == other_sess->s_id.b24) { if (loop_id != other_sess->loop_id) { ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c, "Invalidating sess %p loop_id %d wwn %llx.\n", other_sess, other_sess->loop_id, other_wwn); /* * logout_on_delete is set by default, but another * session that has the same s_id/loop_id combo * might have cleared it when requested this session * deletion, so don't touch it */ qlt_schedule_sess_for_deletion(other_sess, true); } else { /* * Another wwn used to have our s_id/loop_id * kill the session, but don't free the loop_id */ other_sess->keep_nport_handle = 1; *conflict_sess = other_sess; qlt_schedule_sess_for_deletion(other_sess, true); } continue; } /* find other sess with nport handle collision */ if (loop_id == other_sess->loop_id) { ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d, "Invalidating sess %p loop_id %d wwn %llx.\n", other_sess, other_sess->loop_id, other_wwn); /* Same loop_id but different s_id * Ok to kill and logout */ qlt_schedule_sess_for_deletion(other_sess, true); } } return sess; } /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */ static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id) { struct qla_tgt_sess_op *op; struct qla_tgt_cmd *cmd; uint32_t key; int count = 0; key = (((u32)s_id->b.domain << 16) | ((u32)s_id->b.area << 8) | ((u32)s_id->b.al_pa)); spin_lock(&vha->cmd_list_lock); list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); if (op_key == key) { op->aborted = true; count++; } } list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); if (cmd_key == key) { cmd->aborted = 1; count++; } } spin_unlock(&vha->cmd_list_lock); return count; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static int qlt_24xx_handle_els(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *iocb) { struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL; uint64_t wwn; port_id_t port_id; uint16_t loop_id; uint16_t wd3_lo; int res = 0; qlt_plogi_ack_t *pla; unsigned long flags; wwn = wwn_to_u64(iocb->u.isp24.port_name); port_id.b.domain = iocb->u.isp24.port_id[2]; port_id.b.area = iocb->u.isp24.port_id[1]; port_id.b.al_pa = iocb->u.isp24.port_id[0]; port_id.b.rsvd_1 = 0; loop_id = le16_to_cpu(iocb->u.isp24.nport_handle); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); /* res = 1 means ack at the end of thread * res = 0 means ack async/later. */ switch (iocb->u.isp24.status_subcode) { case ELS_PLOGI: /* Mark all stale commands in qla_tgt_wq for deletion */ abort_cmds_for_s_id(vha, &port_id); if (wwn) { spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, loop_id, &conflict_sess); spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); } if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) { res = 1; break; } pla = qlt_plogi_ack_find_add(vha, &port_id, iocb); if (!pla) { qlt_send_term_imm_notif(vha, iocb, 1); res = 0; break; } res = 0; if (conflict_sess) qlt_plogi_ack_link(vha, pla, conflict_sess, QLT_PLOGI_LINK_CONFLICT); if (!sess) break; qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN); /* * Under normal circumstances we want to release nport handle * during LOGO process to avoid nport handle leaks inside FW. * The exception is when LOGO is done while another PLOGI with * the same nport handle is waiting as might be the case here. * Note: there is always a possibily of a race where session * deletion has already started for other reasons (e.g. ACL * removal) and now PLOGI arrives: * 1. if PLOGI arrived in FW after nport handle has been freed, * FW must have assigned this PLOGI a new/same handle and we * can proceed ACK'ing it as usual when session deletion * completes. * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT * bit reached it, the handle has now been released. We'll * get an error when we ACK this PLOGI. Nothing will be sent * back to initiator. Initiator should eventually retry * PLOGI and situation will correct itself. */ sess->keep_nport_handle = ((sess->loop_id == loop_id) && (sess->s_id.b24 == port_id.b24)); qlt_schedule_sess_for_deletion(sess, true); break; case ELS_PRLI: wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); if (wwn) { spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, loop_id, &conflict_sess); spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); } if (conflict_sess) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b, "PRLI with conflicting sess %p port %8phC\n", conflict_sess, conflict_sess->port_name); qlt_send_term_imm_notif(vha, iocb, 1); res = 0; break; } if (sess != NULL) { if (sess->deleted) { /* * Impatient initiator sent PRLI before last * PLOGI could finish. Will force him to re-try, * while last one finishes. */ ql_log(ql_log_warn, sess->vha, 0xf095, "sess %p PRLI received, before plogi ack.\n", sess); qlt_send_term_imm_notif(vha, iocb, 1); res = 0; break; } /* * This shouldn't happen under normal circumstances, * since we have deleted the old session during PLOGI */ ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096, "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n", sess->loop_id, sess, iocb->u.isp24.nport_handle); sess->local = 0; sess->loop_id = loop_id; sess->s_id = port_id; if (wd3_lo & BIT_7) sess->conf_compl_supported = 1; } res = 1; /* send notify ack */ /* Make session global (not used in fabric mode) */ if (ha->current_topology != ISP_CFG_F) { set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); qla2xxx_wake_dpc(vha); } else { /* todo: else - create sess here. */ res = 1; /* send notify ack */ } break; case ELS_LOGO: case ELS_PRLO: res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); break; case ELS_PDISC: case ELS_ADISC: { struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; if (tgt->link_reinit_iocb_pending) { qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0); tgt->link_reinit_iocb_pending = 0; } res = 1; /* send notify ack */ break; } case ELS_FLOGI: /* should never happen */ default: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, "qla_target(%d): Unsupported ELS command %x " "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); break; } return res; } static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) { #if 1 /* * FIXME: Reject non zero SRR relative offset until we can test * this code properly. */ pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); return -1; #else struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; size_t first_offset = 0, rem_offset = offset, tmp = 0; int i, sg_srr_cnt, bufflen = 0; ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " "cmd->sg_cnt: %u, direction: %d\n", cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); if (!cmd->sg || !cmd->sg_cnt) { ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, "Missing cmd->sg or zero cmd->sg_cnt in" " qla_tgt_set_data_offset\n"); return -EINVAL; } /* * Walk the current cmd->sg list until we locate the new sg_srr_start */ for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, "sg[%d]: %p page: %p, length: %d, offset: %d\n", i, sg, sg_page(sg), sg->length, sg->offset); if ((sg->length + tmp) > offset) { first_offset = rem_offset; sg_srr_start = sg; ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, "Found matching sg[%d], using %p as sg_srr_start, " "and using first_offset: %zu\n", i, sg, first_offset); break; } tmp += sg->length; rem_offset -= sg->length; } if (!sg_srr_start) { ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, "Unable to locate sg_srr_start for offset: %u\n", offset); return -EINVAL; } sg_srr_cnt = (cmd->sg_cnt - i); sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); if (!sg_srr) { ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, "Unable to allocate sgp\n"); return -ENOMEM; } sg_init_table(sg_srr, sg_srr_cnt); sgp = &sg_srr[0]; /* * Walk the remaining list for sg_srr_start, mapping to the newly * allocated sg_srr taking first_offset into account. */ for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { if (first_offset) { sg_set_page(sgp, sg_page(sg), (sg->length - first_offset), first_offset); first_offset = 0; } else { sg_set_page(sgp, sg_page(sg), sg->length, 0); } bufflen += sgp->length; sgp = sg_next(sgp); if (!sgp) break; } cmd->sg = sg_srr; cmd->sg_cnt = sg_srr_cnt; cmd->bufflen = bufflen; cmd->offset += offset; cmd->free_sg = 1; ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", cmd->sg_cnt); ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", cmd->bufflen); ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", cmd->offset); if (cmd->sg_cnt < 0) BUG(); if (cmd->bufflen < 0) BUG(); return 0; #endif } static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, uint32_t srr_rel_offs, int *xmit_type) { int res = 0, rel_offs; rel_offs = srr_rel_offs - cmd->offset; ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", srr_rel_offs, rel_offs); *xmit_type = QLA_TGT_XMIT_ALL; if (rel_offs < 0) { ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, "qla_target(%d): SRR rel_offs (%d) < 0", cmd->vha->vp_idx, rel_offs); res = -1; } else if (rel_offs == cmd->bufflen) *xmit_type = QLA_TGT_XMIT_STATUS; else if (rel_offs > 0) res = qlt_set_data_offset(cmd, rel_offs); return res; } /* No locks, thread context */ static void qlt_handle_srr(struct scsi_qla_host *vha, struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) { struct imm_ntfy_from_isp *ntfy = (struct imm_ntfy_from_isp *)&imm->imm_ntfy; struct qla_hw_data *ha = vha->hw; struct qla_tgt_cmd *cmd = sctio->cmd; struct se_cmd *se_cmd = &cmd->se_cmd; unsigned long flags; int xmit_type = 0, resp = 0; uint32_t offset; uint16_t srr_ui; offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); srr_ui = ntfy->u.isp24.srr_ui; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", cmd, srr_ui); switch (srr_ui) { case SRR_IU_STATUS: spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_notify_ack(vha, ntfy, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); xmit_type = QLA_TGT_XMIT_STATUS; resp = 1; break; case SRR_IU_DATA_IN: if (!cmd->sg || !cmd->sg_cnt) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, "Unable to process SRR_IU_DATA_IN due to" " missing cmd->sg, state: %d\n", cmd->state); dump_stack(); goto out_reject; } if (se_cmd->scsi_status != 0) { ql_dbg(ql_dbg_tgt, vha, 0xe02a, "Rejecting SRR_IU_DATA_IN with non GOOD " "scsi_status\n"); goto out_reject; } cmd->bufflen = se_cmd->data_length; if (qlt_has_data(cmd)) { if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) goto out_reject; spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_notify_ack(vha, ntfy, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); resp = 1; } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); goto out_reject; } break; case SRR_IU_DATA_OUT: if (!cmd->sg || !cmd->sg_cnt) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, "Unable to process SRR_IU_DATA_OUT due to" " missing cmd->sg\n"); dump_stack(); goto out_reject; } if (se_cmd->scsi_status != 0) { ql_dbg(ql_dbg_tgt, vha, 0xe02b, "Rejecting SRR_IU_DATA_OUT" " with non GOOD scsi_status\n"); goto out_reject; } cmd->bufflen = se_cmd->data_length; if (qlt_has_data(cmd)) { if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) goto out_reject; spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_notify_ack(vha, ntfy, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); if (xmit_type & QLA_TGT_XMIT_DATA) { cmd->cmd_flags |= BIT_8; qlt_rdy_to_xfer(cmd); } } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); goto out_reject; } break; default: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, "qla_target(%d): Unknown srr_ui value %x", vha->vp_idx, srr_ui); goto out_reject; } /* Transmit response in case of status and data-in cases */ if (resp) { cmd->cmd_flags |= BIT_7; qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); } return; out_reject: spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_notify_ack(vha, ntfy, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_REJECT, NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); if (cmd->state == QLA_TGT_STATE_NEED_DATA) { cmd->state = QLA_TGT_STATE_DATA_IN; dump_stack(); } else { cmd->cmd_flags |= BIT_9; qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); } spin_unlock_irqrestore(&ha->hardware_lock, flags); } static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, struct qla_tgt_srr_imm *imm, int ha_locked) { struct qla_hw_data *ha = vha->hw; unsigned long flags = 0; #ifndef __CHECKER__ if (!ha_locked) spin_lock_irqsave(&ha->hardware_lock, flags); #endif qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_REJECT, NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); #ifndef __CHECKER__ if (!ha_locked) spin_unlock_irqrestore(&ha->hardware_lock, flags); #endif kfree(imm); } static void qlt_handle_srr_work(struct work_struct *work) { struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); struct scsi_qla_host *vha = tgt->vha; struct qla_tgt_srr_ctio *sctio; unsigned long flags; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", tgt); restart: spin_lock_irqsave(&tgt->srr_lock, flags); list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { struct qla_tgt_srr_imm *imm, *i, *ti; struct qla_tgt_cmd *cmd; struct se_cmd *se_cmd; imm = NULL; list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, srr_list_entry) { if (i->srr_id == sctio->srr_id) { list_del(&i->srr_list_entry); if (imm) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, "qla_target(%d): There must be " "only one IMM SRR per CTIO SRR " "(IMM SRR %p, id %d, CTIO %p\n", vha->vp_idx, i, i->srr_id, sctio); qlt_reject_free_srr_imm(tgt->vha, i, 0); } else imm = i; } } ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, sctio->srr_id); if (imm == NULL) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, "Not found matching IMM for SRR CTIO (id %d)\n", sctio->srr_id); continue; } else list_del(&sctio->srr_list_entry); spin_unlock_irqrestore(&tgt->srr_lock, flags); cmd = sctio->cmd; /* * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() * logic.. */ cmd->offset = 0; if (cmd->free_sg) { kfree(cmd->sg); cmd->sg = NULL; cmd->free_sg = 0; } se_cmd = &cmd->se_cmd; cmd->sg_cnt = se_cmd->t_data_nents; cmd->sg = se_cmd->t_data_sg; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); qlt_handle_srr(vha, sctio, imm); kfree(imm); kfree(sctio); goto restart; } spin_unlock_irqrestore(&tgt->srr_lock, flags); } /* ha->hardware_lock supposed to be held on entry */ static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *iocb) { struct qla_tgt_srr_imm *imm; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_tgt_srr_ctio *sctio; tgt->imm_srr_id++; ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", vha->vp_idx); imm = kzalloc(sizeof(*imm), GFP_ATOMIC); if (imm != NULL) { memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); /* IRQ is already OFF */ spin_lock(&tgt->srr_lock); imm->srr_id = tgt->imm_srr_id; list_add_tail(&imm->srr_list_entry, &tgt->srr_imm_list); ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, "IMM NTFY SRR %p added (id %d, ui %x)\n", imm, imm->srr_id, iocb->u.isp24.srr_ui); if (tgt->imm_srr_id == tgt->ctio_srr_id) { int found = 0; list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { if (sctio->srr_id == imm->srr_id) { found = 1; break; } } if (found) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", "Scheduling srr work\n"); schedule_work(&tgt->srr_work); } else { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, "qla_target(%d): imm_srr_id " "== ctio_srr_id (%d), but there is no " "corresponding SRR CTIO, deleting IMM " "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, imm); list_del(&imm->srr_list_entry); kfree(imm); spin_unlock(&tgt->srr_lock); goto out_reject; } } spin_unlock(&tgt->srr_lock); } else { struct qla_tgt_srr_ctio *ts; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, "qla_target(%d): Unable to allocate SRR IMM " "entry, SRR request will be rejected\n", vha->vp_idx); /* IRQ is already OFF */ spin_lock(&tgt->srr_lock); list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, srr_list_entry) { if (sctio->srr_id == tgt->imm_srr_id) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, "CTIO SRR %p deleted (id %d)\n", sctio, sctio->srr_id); list_del(&sctio->srr_list_entry); qlt_send_term_exchange(vha, sctio->cmd, &sctio->cmd->atio, 1, 0); kfree(sctio); } } spin_unlock(&tgt->srr_lock); goto out_reject; } return; out_reject: qlt_send_notify_ack(vha, iocb, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_REJECT, NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ static void qlt_handle_imm_notify(struct scsi_qla_host *vha, struct imm_ntfy_from_isp *iocb) { struct qla_hw_data *ha = vha->hw; uint32_t add_flags = 0; int send_notify_ack = 1; uint16_t status; status = le16_to_cpu(iocb->u.isp2x.status); switch (status) { case IMM_NTFY_LIP_RESET: { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, "qla_target(%d): LIP reset (loop %#x), subcode %x\n", vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), iocb->u.isp24.status_subcode); if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) send_notify_ack = 0; break; } case IMM_NTFY_LIP_LINK_REINIT: { struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, "qla_target(%d): LINK REINIT (loop %#x, " "subcode %x)\n", vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), iocb->u.isp24.status_subcode); if (tgt->link_reinit_iocb_pending) { qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0); } memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); tgt->link_reinit_iocb_pending = 1; /* * QLogic requires to wait after LINK REINIT for possible * PDISC or ADISC ELS commands */ send_notify_ack = 0; break; } case IMM_NTFY_PORT_LOGOUT: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, "qla_target(%d): Port logout (loop " "%#x, subcode %x)\n", vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), iocb->u.isp24.status_subcode); if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) send_notify_ack = 0; /* The sessions will be cleared in the callback, if needed */ break; case IMM_NTFY_GLBL_TPRLO: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) send_notify_ack = 0; /* The sessions will be cleared in the callback, if needed */ break; case IMM_NTFY_PORT_CONFIG: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, status); if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) send_notify_ack = 0; /* The sessions will be cleared in the callback, if needed */ break; case IMM_NTFY_GLBL_LOGO: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, "qla_target(%d): Link failure detected\n", vha->vp_idx); /* I_T nexus loss */ if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) send_notify_ack = 0; break; case IMM_NTFY_IOCB_OVERFLOW: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, "qla_target(%d): Cannot provide requested " "capability (IOCB overflowed the immediate notify " "resource count)\n", vha->vp_idx); break; case IMM_NTFY_ABORT_TASK: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, "qla_target(%d): Abort Task (S %08x I %#x -> " "L %#x)\n", vha->vp_idx, le16_to_cpu(iocb->u.isp2x.seq_id), GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), le16_to_cpu(iocb->u.isp2x.lun)); if (qlt_abort_task(vha, iocb) == 0) send_notify_ack = 0; break; case IMM_NTFY_RESOURCE: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, "qla_target(%d): Out of resources, host %ld\n", vha->vp_idx, vha->host_no); break; case IMM_NTFY_MSG_RX: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, "qla_target(%d): Immediate notify task %x\n", vha->vp_idx, iocb->u.isp2x.task_flags); if (qlt_handle_task_mgmt(vha, iocb) == 0) send_notify_ack = 0; break; case IMM_NTFY_ELS: if (qlt_24xx_handle_els(vha, iocb) == 0) send_notify_ack = 0; break; case IMM_NTFY_SRR: qlt_prepare_srr_imm(vha, iocb); send_notify_ack = 0; break; default: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, "qla_target(%d): Received unknown immediate " "notify status %x\n", vha->vp_idx, status); break; } if (send_notify_ack) qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire * This function sends busy to ISP 2xxx or 24xx. */ static int __qlt_send_busy(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint16_t status) { struct ctio7_to_24xx *ctio24; struct qla_hw_data *ha = vha->hw; request_t *pkt; struct qla_tgt_sess *sess = NULL; unsigned long flags; spin_lock_irqsave(&ha->tgt.sess_lock, flags); sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); if (!sess) { qlt_send_term_exchange(vha, NULL, atio, 1, 0); return 0; } /* Sending marker isn't necessary, since we called from ISR */ pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); if (!pkt) { ql_dbg(ql_dbg_io, vha, 0x3063, "qla_target(%d): %s failed: unable to allocate " "request packet", vha->vp_idx, __func__); return -ENOMEM; } vha->tgt_counters.num_q_full_sent++; pkt->entry_count = 1; pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; ctio24 = (struct ctio7_to_24xx *)pkt; ctio24->entry_type = CTIO_TYPE7; ctio24->nport_handle = sess->loop_id; ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); ctio24->vp_index = vha->vp_idx; ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; ctio24->exchange_addr = atio->u.isp24.exchange_addr; ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | cpu_to_le16( CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | CTIO7_FLAGS_DONT_RET_CTIO); /* * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, * if the explicit conformation is used. */ ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); ctio24->u.status1.scsi_status = cpu_to_le16(status); /* Memory Barrier */ wmb(); qla2x00_start_iocbs(vha, vha->req); return 0; } /* * This routine is used to allocate a command for either a QFull condition * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go * out previously. */ static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint16_t status, int qfull) { struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess; struct se_session *se_sess; struct qla_tgt_cmd *cmd; int tag; if (unlikely(tgt->tgt_stop)) { ql_dbg(ql_dbg_io, vha, 0x300a, "New command while device %p is shutting down\n", tgt); return; } if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { vha->hw->tgt.num_qfull_cmds_dropped++; if (vha->hw->tgt.num_qfull_cmds_dropped > vha->qla_stats.stat_max_qfull_cmds_dropped) vha->qla_stats.stat_max_qfull_cmds_dropped = vha->hw->tgt.num_qfull_cmds_dropped; ql_dbg(ql_dbg_io, vha, 0x3068, "qla_target(%d): %s: QFull CMD dropped[%d]\n", vha->vp_idx, __func__, vha->hw->tgt.num_qfull_cmds_dropped); qlt_chk_exch_leak_thresh_hold(vha); return; } sess = ha->tgt.tgt_ops->find_sess_by_s_id (vha, atio->u.isp24.fcp_hdr.s_id); if (!sess) return; se_sess = sess->se_sess; tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); if (tag < 0) return; cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; if (!cmd) { ql_dbg(ql_dbg_io, vha, 0x3009, "qla_target(%d): %s: Allocation of cmd failed\n", vha->vp_idx, __func__); vha->hw->tgt.num_qfull_cmds_dropped++; if (vha->hw->tgt.num_qfull_cmds_dropped > vha->qla_stats.stat_max_qfull_cmds_dropped) vha->qla_stats.stat_max_qfull_cmds_dropped = vha->hw->tgt.num_qfull_cmds_dropped; qlt_chk_exch_leak_thresh_hold(vha); return; } memset(cmd, 0, sizeof(struct qla_tgt_cmd)); qlt_incr_num_pend_cmds(vha); INIT_LIST_HEAD(&cmd->cmd_list); memcpy(&cmd->atio, atio, sizeof(*atio)); cmd->tgt = vha->vha_tgt.qla_tgt; cmd->vha = vha; cmd->reset_count = vha->hw->chip_reset; cmd->q_full = 1; if (qfull) { cmd->q_full = 1; /* NOTE: borrowing the state field to carry the status */ cmd->state = status; } else cmd->term_exchg = 1; list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); vha->hw->tgt.num_qfull_cmds_alloc++; if (vha->hw->tgt.num_qfull_cmds_alloc > vha->qla_stats.stat_max_qfull_cmds_alloc) vha->qla_stats.stat_max_qfull_cmds_alloc = vha->hw->tgt.num_qfull_cmds_alloc; } int qlt_free_qfull_cmds(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; unsigned long flags; struct qla_tgt_cmd *cmd, *tcmd; struct list_head free_list; int rc = 0; if (list_empty(&ha->tgt.q_full_list)) return 0; INIT_LIST_HEAD(&free_list); spin_lock_irqsave(&vha->hw->hardware_lock, flags); if (list_empty(&ha->tgt.q_full_list)) { spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); return 0; } list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { if (cmd->q_full) /* cmd->state is a borrowed field to hold status */ rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); else if (cmd->term_exchg) rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); if (rc == -ENOMEM) break; if (cmd->q_full) ql_dbg(ql_dbg_io, vha, 0x3006, "%s: busy sent for ox_id[%04x]\n", __func__, be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); else if (cmd->term_exchg) ql_dbg(ql_dbg_io, vha, 0x3007, "%s: Term exchg sent for ox_id[%04x]\n", __func__, be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); else ql_dbg(ql_dbg_io, vha, 0x3008, "%s: Unexpected cmd in QFull list %p\n", __func__, cmd); list_del(&cmd->cmd_list); list_add_tail(&cmd->cmd_list, &free_list); /* piggy back on hardware_lock for protection */ vha->hw->tgt.num_qfull_cmds_alloc--; } spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); cmd = NULL; list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { list_del(&cmd->cmd_list); /* This cmd was never sent to TCM. There is no need * to schedule free or call free_cmd */ qlt_free_cmd(cmd); } return rc; } static void qlt_send_busy(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint16_t status) { int rc = 0; rc = __qlt_send_busy(vha, atio, status); if (rc == -ENOMEM) qlt_alloc_qfull_cmd(vha, atio, status, 1); } static int qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct atio_from_isp *atio, bool ha_locked) { struct qla_hw_data *ha = vha->hw; uint16_t status; unsigned long flags; if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) return 0; if (!ha_locked) spin_lock_irqsave(&ha->hardware_lock, flags); status = temp_sam_status; qlt_send_busy(vha, atio, status); if (!ha_locked) spin_unlock_irqrestore(&ha->hardware_lock, flags); return 1; } /* ha->hardware_lock supposed to be held on entry */ /* called via callback from qla2xxx */ static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, struct atio_from_isp *atio, uint8_t ha_locked) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; int rc; unsigned long flags; if (unlikely(tgt == NULL)) { ql_dbg(ql_dbg_io, vha, 0x3064, "ATIO pkt, but no tgt (ha %p)", ha); return; } /* * In tgt_stop mode we also should allow all requests to pass. * Otherwise, some commands can stuck. */ tgt->atio_irq_cmd_count++; switch (atio->u.raw.entry_type) { case ATIO_TYPE7: if (unlikely(atio->u.isp24.exchange_addr == ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { ql_dbg(ql_dbg_io, vha, 0x3065, "qla_target(%d): ATIO_TYPE7 " "received with UNKNOWN exchange address, " "sending QUEUE_FULL\n", vha->vp_idx); if (!ha_locked) spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); if (!ha_locked) spin_unlock_irqrestore(&ha->hardware_lock, flags); break; } if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { rc = qlt_chk_qfull_thresh_hold(vha, atio, ha_locked); if (rc != 0) { tgt->atio_irq_cmd_count--; return; } rc = qlt_handle_cmd_for_atio(vha, atio); } else { rc = qlt_handle_task_mgmt(vha, atio); } if (unlikely(rc != 0)) { if (rc == -ESRCH) { if (!ha_locked) spin_lock_irqsave (&ha->hardware_lock, flags); #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ qlt_send_busy(vha, atio, SAM_STAT_BUSY); #else qlt_send_term_exchange(vha, NULL, atio, 1, 0); #endif if (!ha_locked) spin_unlock_irqrestore (&ha->hardware_lock, flags); } else { if (tgt->tgt_stop) { ql_dbg(ql_dbg_tgt, vha, 0xe059, "qla_target: Unable to send " "command to target for req, " "ignoring.\n"); } else { ql_dbg(ql_dbg_tgt, vha, 0xe05a, "qla_target(%d): Unable to send " "command to target, sending BUSY " "status.\n", vha->vp_idx); if (!ha_locked) spin_lock_irqsave( &ha->hardware_lock, flags); qlt_send_busy(vha, atio, SAM_STAT_BUSY); if (!ha_locked) spin_unlock_irqrestore( &ha->hardware_lock, flags); } } } break; case IMMED_NOTIFY_TYPE: { if (unlikely(atio->u.isp2x.entry_status != 0)) { ql_dbg(ql_dbg_tgt, vha, 0xe05b, "qla_target(%d): Received ATIO packet %x " "with error status %x\n", vha->vp_idx, atio->u.raw.entry_type, atio->u.isp2x.entry_status); break; } ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); if (!ha_locked) spin_lock_irqsave(&ha->hardware_lock, flags); qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); if (!ha_locked) spin_unlock_irqrestore(&ha->hardware_lock, flags); break; } default: ql_dbg(ql_dbg_tgt, vha, 0xe05c, "qla_target(%d): Received unknown ATIO atio " "type %x\n", vha->vp_idx, atio->u.raw.entry_type); break; } tgt->atio_irq_cmd_count--; } /* ha->hardware_lock supposed to be held on entry */ /* called via callback from qla2xxx */ static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; if (unlikely(tgt == NULL)) { ql_dbg(ql_dbg_tgt, vha, 0xe05d, "qla_target(%d): Response pkt %x received, but no " "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); return; } /* * In tgt_stop mode we also should allow all requests to pass. * Otherwise, some commands can stuck. */ tgt->irq_cmd_count++; switch (pkt->entry_type) { case CTIO_CRC2: case CTIO_TYPE7: { struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; qlt_do_ctio_completion(vha, entry->handle, le16_to_cpu(entry->status)|(pkt->entry_status << 16), entry); break; } case ACCEPT_TGT_IO_TYPE: { struct atio_from_isp *atio = (struct atio_from_isp *)pkt; int rc; if (atio->u.isp2x.status != cpu_to_le16(ATIO_CDB_VALID)) { ql_dbg(ql_dbg_tgt, vha, 0xe05e, "qla_target(%d): ATIO with error " "status %x received\n", vha->vp_idx, le16_to_cpu(atio->u.isp2x.status)); break; } rc = qlt_chk_qfull_thresh_hold(vha, atio, true); if (rc != 0) { tgt->irq_cmd_count--; return; } rc = qlt_handle_cmd_for_atio(vha, atio); if (unlikely(rc != 0)) { if (rc == -ESRCH) { #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ qlt_send_busy(vha, atio, 0); #else qlt_send_term_exchange(vha, NULL, atio, 1, 0); #endif } else { if (tgt->tgt_stop) { ql_dbg(ql_dbg_tgt, vha, 0xe05f, "qla_target: Unable to send " "command to target, sending TERM " "EXCHANGE for rsp\n"); qlt_send_term_exchange(vha, NULL, atio, 1, 0); } else { ql_dbg(ql_dbg_tgt, vha, 0xe060, "qla_target(%d): Unable to send " "command to target, sending BUSY " "status\n", vha->vp_idx); qlt_send_busy(vha, atio, 0); } } } } break; case CONTINUE_TGT_IO_TYPE: { struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; qlt_do_ctio_completion(vha, entry->handle, le16_to_cpu(entry->status)|(pkt->entry_status << 16), entry); break; } case CTIO_A64_TYPE: { struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; qlt_do_ctio_completion(vha, entry->handle, le16_to_cpu(entry->status)|(pkt->entry_status << 16), entry); break; } case IMMED_NOTIFY_TYPE: ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); break; case NOTIFY_ACK_TYPE: if (tgt->notify_ack_expected > 0) { struct nack_to_isp *entry = (struct nack_to_isp *)pkt; ql_dbg(ql_dbg_tgt, vha, 0xe036, "NOTIFY_ACK seq %08x status %x\n", le16_to_cpu(entry->u.isp2x.seq_id), le16_to_cpu(entry->u.isp2x.status)); tgt->notify_ack_expected--; if (entry->u.isp2x.status != cpu_to_le16(NOTIFY_ACK_SUCCESS)) { ql_dbg(ql_dbg_tgt, vha, 0xe061, "qla_target(%d): NOTIFY_ACK " "failed %x\n", vha->vp_idx, le16_to_cpu(entry->u.isp2x.status)); } } else { ql_dbg(ql_dbg_tgt, vha, 0xe062, "qla_target(%d): Unexpected NOTIFY_ACK received\n", vha->vp_idx); } break; case ABTS_RECV_24XX: ql_dbg(ql_dbg_tgt, vha, 0xe037, "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); break; case ABTS_RESP_24XX: if (tgt->abts_resp_expected > 0) { struct abts_resp_from_24xx_fw *entry = (struct abts_resp_from_24xx_fw *)pkt; ql_dbg(ql_dbg_tgt, vha, 0xe038, "ABTS_RESP_24XX: compl_status %x\n", entry->compl_status); tgt->abts_resp_expected--; if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) { if ((entry->error_subcode1 == 0x1E) && (entry->error_subcode2 == 0)) { /* * We've got a race here: aborted * exchange not terminated, i.e. * response for the aborted command was * sent between the abort request was * received and processed. * Unfortunately, the firmware has a * silly requirement that all aborted * exchanges must be explicitely * terminated, otherwise it refuses to * send responses for the abort * requests. So, we have to * (re)terminate the exchange and retry * the abort response. */ qlt_24xx_retry_term_exchange(vha, entry); } else ql_dbg(ql_dbg_tgt, vha, 0xe063, "qla_target(%d): ABTS_RESP_24XX " "failed %x (subcode %x:%x)", vha->vp_idx, entry->compl_status, entry->error_subcode1, entry->error_subcode2); } } else { ql_dbg(ql_dbg_tgt, vha, 0xe064, "qla_target(%d): Unexpected ABTS_RESP_24XX " "received\n", vha->vp_idx); } break; default: ql_dbg(ql_dbg_tgt, vha, 0xe065, "qla_target(%d): Received unknown response pkt " "type %x\n", vha->vp_idx, pkt->entry_type); break; } tgt->irq_cmd_count--; } /* * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire */ void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, uint16_t *mailbox) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; int login_code; if (!ha->tgt.tgt_ops) return; if (unlikely(tgt == NULL)) { ql_dbg(ql_dbg_tgt, vha, 0xe03a, "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); return; } if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && IS_QLA2100(ha)) return; /* * In tgt_stop mode we also should allow all requests to pass. * Otherwise, some commands can stuck. */ tgt->irq_cmd_count++; switch (code) { case MBA_RESET: /* Reset */ case MBA_SYSTEM_ERR: /* System Error */ case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, "qla_target(%d): System error async event %#x " "occurred", vha->vp_idx, code); break; case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); break; case MBA_LOOP_UP: { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, "qla_target(%d): Async LOOP_UP occurred " "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); if (tgt->link_reinit_iocb_pending) { qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0); tgt->link_reinit_iocb_pending = 0; } break; } case MBA_LIP_OCCURRED: case MBA_LOOP_DOWN: case MBA_LIP_RESET: case MBA_RSCN_UPDATE: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, "qla_target(%d): Async event %#x occurred " "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); break; case MBA_PORT_UPDATE: ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, "qla_target(%d): Port update async event %#x " "occurred: updating the ports database (m[0]=%x, m[1]=%x, " "m[2]=%x, m[3]=%x)", vha->vp_idx, code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); login_code = le16_to_cpu(mailbox[2]); if (login_code == 0x4) ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, "Async MB 2: Got PLOGI Complete\n"); else if (login_code == 0x7) ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, "Async MB 2: Port Logged Out\n"); break; default: break; } tgt->irq_cmd_count--; } static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, uint16_t loop_id) { fc_port_t *fcport; int rc; fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL); if (!fcport) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, "qla_target(%d): Allocation of tmp FC port failed", vha->vp_idx); return NULL; } fcport->loop_id = loop_id; rc = qla2x00_get_port_database(vha, fcport, 0); if (rc != QLA_SUCCESS) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, "qla_target(%d): Failed to retrieve fcport " "information -- get_port_database() returned %x " "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); kfree(fcport); return NULL; } return fcport; } /* Must be called under tgt_mutex */ static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, uint8_t *s_id) { struct qla_tgt_sess *sess = NULL; fc_port_t *fcport = NULL; int rc, global_resets; uint16_t loop_id = 0; mutex_lock(&vha->vha_tgt.tgt_mutex); retry: global_resets = atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); rc = qla24xx_get_loop_id(vha, s_id, &loop_id); if (rc != 0) { mutex_unlock(&vha->vha_tgt.tgt_mutex); if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) { /* * This is Domain Controller, so it should be * OK to drop SCSI commands from it. */ ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, "Unable to find initiator with S_ID %x:%x:%x", s_id[0], s_id[1], s_id[2]); } else ql_log(ql_log_info, vha, 0xf071, "qla_target(%d): Unable to find " "initiator with S_ID %x:%x:%x", vha->vp_idx, s_id[0], s_id[1], s_id[2]); if (rc == -ENOENT) { qlt_port_logo_t logo; sid_to_portid(s_id, &logo.id); logo.cmd_count = 1; qlt_send_first_logo(vha, &logo); } return NULL; } fcport = qlt_get_port_database(vha, loop_id); if (!fcport) { mutex_unlock(&vha->vha_tgt.tgt_mutex); return NULL; } if (global_resets != atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, "qla_target(%d): global reset during session discovery " "(counter was %d, new %d), retrying", vha->vp_idx, global_resets, atomic_read(&vha->vha_tgt. qla_tgt->tgt_global_resets_count)); goto retry; } sess = qlt_create_sess(vha, fcport, true); mutex_unlock(&vha->vha_tgt.tgt_mutex); kfree(fcport); return sess; } static void qlt_abort_work(struct qla_tgt *tgt, struct qla_tgt_sess_work_param *prm) { struct scsi_qla_host *vha = tgt->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess = NULL; unsigned long flags = 0, flags2 = 0; uint8_t s_id[3]; int rc; spin_lock_irqsave(&ha->tgt.sess_lock, flags2); if (tgt->tgt_stop) goto out_term2; s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); if (!sess) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); sess = qlt_make_local_sess(vha, s_id); /* sess has got an extra creation ref */ spin_lock_irqsave(&ha->tgt.sess_lock, flags2); if (!sess) goto out_term2; } else { if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { sess = NULL; goto out_term2; } kref_get(&sess->sess_kref); } spin_lock_irqsave(&ha->hardware_lock, flags); if (tgt->tgt_stop) goto out_term; rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); if (rc != 0) goto out_term; spin_unlock_irqrestore(&ha->hardware_lock, flags); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); return; out_term2: spin_lock_irqsave(&ha->hardware_lock, flags); out_term: qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); spin_unlock_irqrestore(&ha->hardware_lock, flags); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); } static void qlt_tmr_work(struct qla_tgt *tgt, struct qla_tgt_sess_work_param *prm) { struct atio_from_isp *a = &prm->tm_iocb2; struct scsi_qla_host *vha = tgt->vha; struct qla_hw_data *ha = vha->hw; struct qla_tgt_sess *sess = NULL; unsigned long flags; uint8_t *s_id = NULL; /* to hide compiler warnings */ int rc; uint32_t lun, unpacked_lun; int fn; void *iocb; spin_lock_irqsave(&ha->tgt.sess_lock, flags); if (tgt->tgt_stop) goto out_term; s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); if (!sess) { spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); sess = qlt_make_local_sess(vha, s_id); /* sess has got an extra creation ref */ spin_lock_irqsave(&ha->tgt.sess_lock, flags); if (!sess) goto out_term; } else { if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { sess = NULL; goto out_term; } kref_get(&sess->sess_kref); } iocb = a; lun = a->u.isp24.fcp_cmnd.lun; fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); if (rc != 0) goto out_term; qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); return; out_term: qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0); qlt_put_sess(sess); spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); } static void qlt_sess_work_fn(struct work_struct *work) { struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); struct scsi_qla_host *vha = tgt->vha; unsigned long flags; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); spin_lock_irqsave(&tgt->sess_work_lock, flags); while (!list_empty(&tgt->sess_works_list)) { struct qla_tgt_sess_work_param *prm = list_entry( tgt->sess_works_list.next, typeof(*prm), sess_works_list_entry); /* * This work can be scheduled on several CPUs at time, so we * must delete the entry to eliminate double processing */ list_del(&prm->sess_works_list_entry); spin_unlock_irqrestore(&tgt->sess_work_lock, flags); switch (prm->type) { case QLA_TGT_SESS_WORK_ABORT: qlt_abort_work(tgt, prm); break; case QLA_TGT_SESS_WORK_TM: qlt_tmr_work(tgt, prm); break; default: BUG_ON(1); break; } spin_lock_irqsave(&tgt->sess_work_lock, flags); kfree(prm); } spin_unlock_irqrestore(&tgt->sess_work_lock, flags); } /* Must be called under tgt_host_action_mutex */ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) { struct qla_tgt *tgt; if (!QLA_TGT_MODE_ENABLED()) return 0; if (!IS_TGT_MODE_CAPABLE(ha)) { ql_log(ql_log_warn, base_vha, 0xe070, "This adapter does not support target mode.\n"); return 0; } ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, "Registering target for host %ld(%p).\n", base_vha->host_no, ha); BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); if (!tgt) { ql_dbg(ql_dbg_tgt, base_vha, 0xe066, "Unable to allocate struct qla_tgt\n"); return -ENOMEM; } if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) base_vha->host->hostt->supported_mode |= MODE_TARGET; tgt->ha = ha; tgt->vha = base_vha; init_waitqueue_head(&tgt->waitQ); INIT_LIST_HEAD(&tgt->sess_list); INIT_LIST_HEAD(&tgt->del_sess_list); INIT_DELAYED_WORK(&tgt->sess_del_work, (void (*)(struct work_struct *))qlt_del_sess_work_fn); spin_lock_init(&tgt->sess_work_lock); INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); INIT_LIST_HEAD(&tgt->sess_works_list); spin_lock_init(&tgt->srr_lock); INIT_LIST_HEAD(&tgt->srr_ctio_list); INIT_LIST_HEAD(&tgt->srr_imm_list); INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); atomic_set(&tgt->tgt_global_resets_count, 0); base_vha->vha_tgt.qla_tgt = tgt; ql_dbg(ql_dbg_tgt, base_vha, 0xe067, "qla_target(%d): using 64 Bit PCI addressing", base_vha->vp_idx); tgt->tgt_enable_64bit_addr = 1; /* 3 is reserved */ tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; if (base_vha->fc_vport) return 0; mutex_lock(&qla_tgt_mutex); list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); mutex_unlock(&qla_tgt_mutex); return 0; } /* Must be called under tgt_host_action_mutex */ int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) { if (!vha->vha_tgt.qla_tgt) return 0; if (vha->fc_vport) { qlt_release(vha->vha_tgt.qla_tgt); return 0; } /* free left over qfull cmds */ qlt_init_term_exchange(vha); mutex_lock(&qla_tgt_mutex); list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); mutex_unlock(&qla_tgt_mutex); ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", vha->host_no, ha); qlt_release(vha->vha_tgt.qla_tgt); return 0; } static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, unsigned char *b) { int i; pr_debug("qla2xxx HW vha->node_name: "); for (i = 0; i < WWN_SIZE; i++) pr_debug("%02x ", vha->node_name[i]); pr_debug("\n"); pr_debug("qla2xxx HW vha->port_name: "); for (i = 0; i < WWN_SIZE; i++) pr_debug("%02x ", vha->port_name[i]); pr_debug("\n"); pr_debug("qla2xxx passed configfs WWPN: "); put_unaligned_be64(wwpn, b); for (i = 0; i < WWN_SIZE; i++) pr_debug("%02x ", b[i]); pr_debug("\n"); } /** * qla_tgt_lport_register - register lport with external module * * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops * @wwpn: Passwd FC target WWPN * @callback: lport initialization callback for tcm_qla2xxx code * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data */ int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, u64 npiv_wwpn, u64 npiv_wwnn, int (*callback)(struct scsi_qla_host *, void *, u64, u64)) { struct qla_tgt *tgt; struct scsi_qla_host *vha; struct qla_hw_data *ha; struct Scsi_Host *host; unsigned long flags; int rc; u8 b[WWN_SIZE]; mutex_lock(&qla_tgt_mutex); list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { vha = tgt->vha; ha = vha->hw; host = vha->host; if (!host) continue; if (!(host->hostt->supported_mode & MODE_TARGET)) continue; spin_lock_irqsave(&ha->hardware_lock, flags); if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", host->host_no); spin_unlock_irqrestore(&ha->hardware_lock, flags); continue; } if (tgt->tgt_stop) { pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", host->host_no); spin_unlock_irqrestore(&ha->hardware_lock, flags); continue; } spin_unlock_irqrestore(&ha->hardware_lock, flags); if (!scsi_host_get(host)) { ql_dbg(ql_dbg_tgt, vha, 0xe068, "Unable to scsi_host_get() for" " qla2xxx scsi_host\n"); continue; } qlt_lport_dump(vha, phys_wwpn, b); if (memcmp(vha->port_name, b, WWN_SIZE)) { scsi_host_put(host); continue; } rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); if (rc != 0) scsi_host_put(host); mutex_unlock(&qla_tgt_mutex); return rc; } mutex_unlock(&qla_tgt_mutex); return -ENODEV; } EXPORT_SYMBOL(qlt_lport_register); /** * qla_tgt_lport_deregister - Degister lport * * @vha: Registered scsi_qla_host pointer */ void qlt_lport_deregister(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; struct Scsi_Host *sh = vha->host; /* * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data */ vha->vha_tgt.target_lport_ptr = NULL; ha->tgt.tgt_ops = NULL; /* * Release the Scsi_Host reference for the underlying qla2xxx host */ scsi_host_put(sh); } EXPORT_SYMBOL(qlt_lport_deregister); /* Must be called under HW lock */ static void qlt_set_mode(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; switch (ql2x_ini_mode) { case QLA2XXX_INI_MODE_DISABLED: case QLA2XXX_INI_MODE_EXCLUSIVE: vha->host->active_mode = MODE_TARGET; break; case QLA2XXX_INI_MODE_ENABLED: vha->host->active_mode |= MODE_TARGET; break; default: break; } if (ha->tgt.ini_mode_force_reverse) qla_reverse_ini_mode(vha); } /* Must be called under HW lock */ static void qlt_clear_mode(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; switch (ql2x_ini_mode) { case QLA2XXX_INI_MODE_DISABLED: vha->host->active_mode = MODE_UNKNOWN; break; case QLA2XXX_INI_MODE_EXCLUSIVE: vha->host->active_mode = MODE_INITIATOR; break; case QLA2XXX_INI_MODE_ENABLED: vha->host->active_mode &= ~MODE_TARGET; break; default: break; } if (ha->tgt.ini_mode_force_reverse) qla_reverse_ini_mode(vha); } /* * qla_tgt_enable_vha - NO LOCK HELD * * host_reset, bring up w/ Target Mode Enabled */ void qlt_enable_vha(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; unsigned long flags; scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER; if (!tgt) { ql_dbg(ql_dbg_tgt, vha, 0xe069, "Unable to locate qla_tgt pointer from" " struct qla_hw_data\n"); dump_stack(); return; } spin_lock_irqsave(&ha->hardware_lock, flags); tgt->tgt_stopped = 0; qlt_set_mode(vha); spin_unlock_irqrestore(&ha->hardware_lock, flags); if (vha->vp_idx) { qla24xx_disable_vp(vha); qla24xx_enable_vp(vha); } else { if (ha->msix_entries) { ql_dbg(ql_dbg_tgt, vha, 0xffff, "%s: host%ld : vector %d cpu %d\n", __func__, vha->host_no, ha->msix_entries[rspq_ent].vector, ha->msix_entries[rspq_ent].cpuid); ha->tgt.rspq_vector_cpuid = ha->msix_entries[rspq_ent].cpuid; } set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); qla2xxx_wake_dpc(base_vha); WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) != QLA_SUCCESS); } } EXPORT_SYMBOL(qlt_enable_vha); /* * qla_tgt_disable_vha - NO LOCK HELD * * Disable Target Mode and reset the adapter */ static void qlt_disable_vha(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; unsigned long flags; if (!tgt) { ql_dbg(ql_dbg_tgt, vha, 0xe06a, "Unable to locate qla_tgt pointer from" " struct qla_hw_data\n"); dump_stack(); return; } spin_lock_irqsave(&ha->hardware_lock, flags); qlt_clear_mode(vha); spin_unlock_irqrestore(&ha->hardware_lock, flags); set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); qla2xxx_wake_dpc(vha); if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) ql_dbg(ql_dbg_tgt, vha, 0xe081, "qla2x00_wait_for_hba_online() failed\n"); } /* * Called from qla_init.c:qla24xx_vport_create() contex to setup * the target mode specific struct scsi_qla_host and struct qla_hw_data * members. */ void qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) { if (!qla_tgt_mode_enabled(vha)) return; vha->vha_tgt.qla_tgt = NULL; mutex_init(&vha->vha_tgt.tgt_mutex); mutex_init(&vha->vha_tgt.tgt_host_action_mutex); qlt_clear_mode(vha); /* * NOTE: Currently the value is kept the same for <24xx and * >=24xx ISPs. If it is necessary to change it, * the check should be added for specific ISPs, * assigning the value appropriately. */ ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; qlt_add_target(ha, vha); } void qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) { /* * FC-4 Feature bit 0 indicates target functionality to the name server. */ if (qla_tgt_mode_enabled(vha)) { if (qla_ini_mode_enabled(vha)) ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; else ct_req->req.rff_id.fc4_feature = BIT_0; } else if (qla_ini_mode_enabled(vha)) { ct_req->req.rff_id.fc4_feature = BIT_1; } } /* * qlt_init_atio_q_entries() - Initializes ATIO queue entries. * @ha: HA context * * Beginning of ATIO ring has initialization control block already built * by nvram config routine. * * Returns 0 on success. */ void qlt_init_atio_q_entries(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; uint16_t cnt; struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; if (!qla_tgt_mode_enabled(vha)) return; for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { pkt->u.raw.signature = ATIO_PROCESSED; pkt++; } } /* * qlt_24xx_process_atio_queue() - Process ATIO queue entries. * @ha: SCSI driver HA context */ void qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked) { struct qla_hw_data *ha = vha->hw; struct atio_from_isp *pkt; int cnt, i; if (!vha->flags.online) return; while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) || fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) { pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; cnt = pkt->u.raw.entry_count; if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) { /* * This packet is corrupted. The header + payload * can not be trusted. There is no point in passing * it further up. */ ql_log(ql_log_warn, vha, 0xffff, "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n", pkt->u.isp24.fcp_hdr.s_id, be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id), le32_to_cpu(pkt->u.isp24.exchange_addr), pkt); adjust_corrupted_atio(pkt); qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0); } else { qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt, ha_locked); } for (i = 0; i < cnt; i++) { ha->tgt.atio_ring_index++; if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { ha->tgt.atio_ring_index = 0; ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; } else ha->tgt.atio_ring_ptr++; pkt->u.raw.signature = ATIO_PROCESSED; pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; } wmb(); } /* Adjust ring index */ WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); } void qlt_24xx_config_rings(struct scsi_qla_host *vha) { struct qla_hw_data *ha = vha->hw; if (!QLA_TGT_MODE_ENABLED()) return; WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); if (IS_ATIO_MSIX_CAPABLE(ha)) { struct qla_msix_entry *msix = &ha->msix_entries[2]; struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; icb->msix_atio = cpu_to_le16(msix->entry); ql_dbg(ql_dbg_init, vha, 0xf072, "Registering ICB vector 0x%x for atio que.\n", msix->entry); } } void qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) { struct qla_hw_data *ha = vha->hw; if (qla_tgt_mode_enabled(vha)) { if (!ha->tgt.saved_set) { /* We save only once */ ha->tgt.saved_exchange_count = nv->exchange_count; ha->tgt.saved_firmware_options_1 = nv->firmware_options_1; ha->tgt.saved_firmware_options_2 = nv->firmware_options_2; ha->tgt.saved_firmware_options_3 = nv->firmware_options_3; ha->tgt.saved_set = 1; } nv->exchange_count = cpu_to_le16(0xFFFF); /* Enable target mode */ nv->firmware_options_1 |= cpu_to_le32(BIT_4); /* Disable ini mode, if requested */ if (!qla_ini_mode_enabled(vha)) nv->firmware_options_1 |= cpu_to_le32(BIT_5); /* Disable Full Login after LIP */ nv->firmware_options_1 &= cpu_to_le32(~BIT_13); /* Enable initial LIP */ nv->firmware_options_1 &= cpu_to_le32(~BIT_9); if (ql2xtgt_tape_enable) /* Enable FC Tape support */ nv->firmware_options_2 |= cpu_to_le32(BIT_12); else /* Disable FC Tape support */ nv->firmware_options_2 &= cpu_to_le32(~BIT_12); /* Disable Full Login after LIP */ nv->host_p &= cpu_to_le32(~BIT_10); /* Enable target PRLI control */ nv->firmware_options_2 |= cpu_to_le32(BIT_14); } else { if (ha->tgt.saved_set) { nv->exchange_count = ha->tgt.saved_exchange_count; nv->firmware_options_1 = ha->tgt.saved_firmware_options_1; nv->firmware_options_2 = ha->tgt.saved_firmware_options_2; nv->firmware_options_3 = ha->tgt.saved_firmware_options_3; } return; } /* out-of-order frames reassembly */ nv->firmware_options_3 |= BIT_6|BIT_9; if (ha->tgt.enable_class_2) { if (vha->flags.init_done) fc_host_supported_classes(vha->host) = FC_COS_CLASS2 | FC_COS_CLASS3; nv->firmware_options_2 |= cpu_to_le32(BIT_8); } else { if (vha->flags.init_done) fc_host_supported_classes(vha->host) = FC_COS_CLASS3; nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); } } void qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, struct init_cb_24xx *icb) { struct qla_hw_data *ha = vha->hw; if (!QLA_TGT_MODE_ENABLED()) return; if (ha->tgt.node_name_set) { memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); icb->firmware_options_1 |= cpu_to_le32(BIT_14); } /* disable ZIO at start time. */ if (!vha->flags.init_done) { uint32_t tmp; tmp = le32_to_cpu(icb->firmware_options_2); tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); icb->firmware_options_2 = cpu_to_le32(tmp); } } void qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) { struct qla_hw_data *ha = vha->hw; if (!QLA_TGT_MODE_ENABLED()) return; if (qla_tgt_mode_enabled(vha)) { if (!ha->tgt.saved_set) { /* We save only once */ ha->tgt.saved_exchange_count = nv->exchange_count; ha->tgt.saved_firmware_options_1 = nv->firmware_options_1; ha->tgt.saved_firmware_options_2 = nv->firmware_options_2; ha->tgt.saved_firmware_options_3 = nv->firmware_options_3; ha->tgt.saved_set = 1; } nv->exchange_count = cpu_to_le16(0xFFFF); /* Enable target mode */ nv->firmware_options_1 |= cpu_to_le32(BIT_4); /* Disable ini mode, if requested */ if (!qla_ini_mode_enabled(vha)) nv->firmware_options_1 |= cpu_to_le32(BIT_5); /* Disable Full Login after LIP */ nv->firmware_options_1 &= cpu_to_le32(~BIT_13); /* Enable initial LIP */ nv->firmware_options_1 &= cpu_to_le32(~BIT_9); if (ql2xtgt_tape_enable) /* Enable FC tape support */ nv->firmware_options_2 |= cpu_to_le32(BIT_12); else /* Disable FC tape support */ nv->firmware_options_2 &= cpu_to_le32(~BIT_12); /* Disable Full Login after LIP */ nv->host_p &= cpu_to_le32(~BIT_10); /* Enable target PRLI control */ nv->firmware_options_2 |= cpu_to_le32(BIT_14); } else { if (ha->tgt.saved_set) { nv->exchange_count = ha->tgt.saved_exchange_count; nv->firmware_options_1 = ha->tgt.saved_firmware_options_1; nv->firmware_options_2 = ha->tgt.saved_firmware_options_2; nv->firmware_options_3 = ha->tgt.saved_firmware_options_3; } return; } /* out-of-order frames reassembly */ nv->firmware_options_3 |= BIT_6|BIT_9; if (ha->tgt.enable_class_2) { if (vha->flags.init_done) fc_host_supported_classes(vha->host) = FC_COS_CLASS2 | FC_COS_CLASS3; nv->firmware_options_2 |= cpu_to_le32(BIT_8); } else { if (vha->flags.init_done) fc_host_supported_classes(vha->host) = FC_COS_CLASS3; nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); } } void qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, struct init_cb_81xx *icb) { struct qla_hw_data *ha = vha->hw; if (!QLA_TGT_MODE_ENABLED()) return; if (ha->tgt.node_name_set) { memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); icb->firmware_options_1 |= cpu_to_le32(BIT_14); } /* disable ZIO at start time. */ if (!vha->flags.init_done) { uint32_t tmp; tmp = le32_to_cpu(icb->firmware_options_2); tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0); icb->firmware_options_2 = cpu_to_le32(tmp); } } void qlt_83xx_iospace_config(struct qla_hw_data *ha) { if (!QLA_TGT_MODE_ENABLED()) return; ha->msix_count += 1; /* For ATIO Q */ } int qlt_24xx_process_response_error(struct scsi_qla_host *vha, struct sts_entry_24xx *pkt) { switch (pkt->entry_type) { case ABTS_RECV_24XX: case ABTS_RESP_24XX: case CTIO_TYPE7: case NOTIFY_ACK_TYPE: case CTIO_CRC2: return 1; default: return 0; } } void qlt_modify_vp_config(struct scsi_qla_host *vha, struct vp_config_entry_24xx *vpmod) { if (qla_tgt_mode_enabled(vha)) vpmod->options_idx1 &= ~BIT_5; /* Disable ini mode, if requested */ if (!qla_ini_mode_enabled(vha)) vpmod->options_idx1 &= ~BIT_4; } void qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) { if (!QLA_TGT_MODE_ENABLED()) return; if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; } else { ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; } mutex_init(&base_vha->vha_tgt.tgt_mutex); mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); qlt_clear_mode(base_vha); } irqreturn_t qla83xx_msix_atio_q(int irq, void *dev_id) { struct rsp_que *rsp; scsi_qla_host_t *vha; struct qla_hw_data *ha; unsigned long flags; rsp = (struct rsp_que *) dev_id; ha = rsp->hw; vha = pci_get_drvdata(ha->pdev); spin_lock_irqsave(&ha->tgt.atio_lock, flags); qlt_24xx_process_atio_queue(vha, 0); spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); return IRQ_HANDLED; } static void qlt_handle_abts_recv_work(struct work_struct *work) { struct qla_tgt_sess_op *op = container_of(work, struct qla_tgt_sess_op, work); scsi_qla_host_t *vha = op->vha; struct qla_hw_data *ha = vha->hw; unsigned long flags; if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset)) return; spin_lock_irqsave(&ha->tgt.atio_lock, flags); qlt_24xx_process_atio_queue(vha, 0); spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); spin_lock_irqsave(&ha->hardware_lock, flags); qlt_response_pkt_all_vps(vha, (response_t *)&op->atio); spin_unlock_irqrestore(&ha->hardware_lock, flags); kfree(op); } void qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt) { struct qla_tgt_sess_op *op; op = kzalloc(sizeof(*op), GFP_ATOMIC); if (!op) { /* do not reach for ATIO queue here. This is best effort err * recovery at this point. */ qlt_response_pkt_all_vps(vha, pkt); return; } memcpy(&op->atio, pkt, sizeof(*pkt)); op->vha = vha; op->chip_reset = vha->hw->chip_reset; INIT_WORK(&op->work, qlt_handle_abts_recv_work); queue_work(qla_tgt_wq, &op->work); return; } int qlt_mem_alloc(struct qla_hw_data *ha) { if (!QLA_TGT_MODE_ENABLED()) return 0; ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * MAX_MULTI_ID_FABRIC, GFP_KERNEL); if (!ha->tgt.tgt_vp_map) return -ENOMEM; ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), &ha->tgt.atio_dma, GFP_KERNEL); if (!ha->tgt.atio_ring) { kfree(ha->tgt.tgt_vp_map); return -ENOMEM; } return 0; } void qlt_mem_free(struct qla_hw_data *ha) { if (!QLA_TGT_MODE_ENABLED()) return; if (ha->tgt.atio_ring) { dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), ha->tgt.atio_ring, ha->tgt.atio_dma); } kfree(ha->tgt.tgt_vp_map); } /* vport_slock to be held by the caller */ void qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) { if (!QLA_TGT_MODE_ENABLED()) return; switch (cmd) { case SET_VP_IDX: vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; break; case SET_AL_PA: vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; break; case RESET_VP_IDX: vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; break; case RESET_AL_PA: vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; break; } } static int __init qlt_parse_ini_mode(void) { if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; else return false; return true; } int __init qlt_init(void) { int ret; if (!qlt_parse_ini_mode()) { ql_log(ql_log_fatal, NULL, 0xe06b, "qlt_parse_ini_mode() failed\n"); return -EINVAL; } if (!QLA_TGT_MODE_ENABLED()) return 0; qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct qla_tgt_mgmt_cmd), 0, NULL); if (!qla_tgt_mgmt_cmd_cachep) { ql_log(ql_log_fatal, NULL, 0xe06d, "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); return -ENOMEM; } qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep", sizeof(qlt_plogi_ack_t), __alignof__(qlt_plogi_ack_t), 0, NULL); if (!qla_tgt_plogi_cachep) { ql_log(ql_log_fatal, NULL, 0xe06d, "kmem_cache_create for qla_tgt_plogi_cachep failed\n"); ret = -ENOMEM; goto out_mgmt_cmd_cachep; } qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, mempool_free_slab, qla_tgt_mgmt_cmd_cachep); if (!qla_tgt_mgmt_cmd_mempool) { ql_log(ql_log_fatal, NULL, 0xe06e, "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); ret = -ENOMEM; goto out_plogi_cachep; } qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); if (!qla_tgt_wq) { ql_log(ql_log_fatal, NULL, 0xe06f, "alloc_workqueue for qla_tgt_wq failed\n"); ret = -ENOMEM; goto out_cmd_mempool; } /* * Return 1 to signal that initiator-mode is being disabled */ return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; out_cmd_mempool: mempool_destroy(qla_tgt_mgmt_cmd_mempool); out_plogi_cachep: kmem_cache_destroy(qla_tgt_plogi_cachep); out_mgmt_cmd_cachep: kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); return ret; } void qlt_exit(void) { if (!QLA_TGT_MODE_ENABLED()) return; destroy_workqueue(qla_tgt_wq); mempool_destroy(qla_tgt_mgmt_cmd_mempool); kmem_cache_destroy(qla_tgt_plogi_cachep); kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); }