diff options
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_target.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 7337 |
1 files changed, 7337 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c new file mode 100644 index 000000000..27d3293ea --- /dev/null +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -0,0 +1,7337 @@ +/* + * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx + * + * based on qla2x00t.c code: + * + * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net> + * Copyright (C) 2004 - 2005 Leonid Stoljar + * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us> + * Copyright (C) 2006 - 2010 ID7 Ltd. + * + * Forward port and refactoring to modern qla2xxx and target/configfs + * + * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org> + * + * 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 <linux/module.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/blkdev.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/list.h> +#include <linux/workqueue.h> +#include <asm/unaligned.h> +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> +#include <target/target_core_base.h> +#include <target/target_core_fabric.h> + +#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; " + "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated " + "when ready " + "\"enabled\" (default) - initiator mode will always stay enabled."); + +static int ql_dm_tgt_ex_pct = 0; +module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(ql_dm_tgt_ex_pct, + "For Dual Mode (qlini_mode=dual), this parameter determines " + "the percentage of exchanges/cmds FW will allocate resources " + "for Target mode."); + +int ql2xuctrlirq = 1; +module_param(ql2xuctrlirq, int, 0644); +MODULE_PARM_DESC(ql2xuctrlirq, + "User to control IRQ placement via smp_affinity." + "Valid with qlini_mode=disabled." + "1(default): enable"); + +int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; + +static int qla_sam_status = SAM_STAT_BUSY; +static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */ + +/* + * 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, struct rsp_que *rsp, + response_t *pkt); +static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun, + int fn, void *iocb, int flags); +static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd + *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort); +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 qla_qpair *qpair, + 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); +static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha, + fc_port_t *fcport, bool local); +void qlt_unreg_sess(struct fc_port *sess); +static void qlt_24xx_handle_abts(struct scsi_qla_host *, + struct abts_recv_from_24xx *); +static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *, + uint16_t); + +/* + * Global Variables + */ +static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; +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); + +static const char *prot_op_str(u32 prot_op) +{ + switch (prot_op) { + case TARGET_PROT_NORMAL: return "NORMAL"; + case TARGET_PROT_DIN_INSERT: return "DIN_INSERT"; + case TARGET_PROT_DOUT_INSERT: return "DOUT_INSERT"; + case TARGET_PROT_DIN_STRIP: return "DIN_STRIP"; + case TARGET_PROT_DOUT_STRIP: return "DOUT_STRIP"; + case TARGET_PROT_DIN_PASS: return "DIN_PASS"; + case TARGET_PROT_DOUT_PASS: return "DOUT_PASS"; + default: return "UNKNOWN"; + } +} + +/* 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(); +} + +/* 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 scsi_qla_host *host; + uint32_t key = 0; + + if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) && + (vha->d_id.b.al_pa == d_id[2])) + return vha; + + key = (uint32_t)d_id[0] << 16; + key |= (uint32_t)d_id[1] << 8; + key |= (uint32_t)d_id[2]; + + host = btree_lookup32(&vha->hw->tgt.host_map, key); + if (!host) + ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005, + "Unable to find host %06x\n", key); + + return host; +} + +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 void qlt_queue_unknown_atio(scsi_qla_host_t *vha, + struct atio_from_isp *atio, uint8_t ha_locked) +{ + struct qla_tgt_sess_op *u; + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + unsigned long flags; + + if (tgt->tgt_stop) { + ql_dbg(ql_dbg_async, vha, 0x502c, + "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped", + vha->vp_idx); + goto out_term; + } + + u = kzalloc(sizeof(*u), GFP_ATOMIC); + if (u == NULL) + goto out_term; + + u->vha = vha; + memcpy(&u->atio, atio, sizeof(*atio)); + INIT_LIST_HEAD(&u->cmd_list); + + spin_lock_irqsave(&vha->cmd_list_lock, flags); + list_add_tail(&u->cmd_list, &vha->unknown_atio_list); + spin_unlock_irqrestore(&vha->cmd_list_lock, flags); + + schedule_delayed_work(&vha->unknown_atio_work, 1); + +out: + return; + +out_term: + qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0); + goto out; +} + +static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha, + uint8_t ha_locked) +{ + struct qla_tgt_sess_op *u, *t; + scsi_qla_host_t *host; + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + unsigned long flags; + uint8_t queued = 0; + + list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) { + if (u->aborted) { + ql_dbg(ql_dbg_async, vha, 0x502e, + "Freeing unknown %s %p, because of Abort\n", + "ATIO_TYPE7", u); + qlt_send_term_exchange(vha->hw->base_qpair, NULL, + &u->atio, ha_locked, 0); + goto abort; + } + + host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id); + if (host != NULL) { + ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f, + "Requeuing unknown ATIO_TYPE7 %p\n", u); + qlt_24xx_atio_pkt(host, &u->atio, ha_locked); + } else if (tgt->tgt_stop) { + ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a, + "Freeing unknown %s %p, because tgt is being stopped\n", + "ATIO_TYPE7", u); + qlt_send_term_exchange(vha->hw->base_qpair, NULL, + &u->atio, ha_locked, 0); + } else { + ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d, + "Reschedule u %p, vha %p, host %p\n", u, vha, host); + if (!queued) { + queued = 1; + schedule_delayed_work(&vha->unknown_atio_work, + 1); + } + continue; + } + +abort: + spin_lock_irqsave(&vha->cmd_list_lock, flags); + list_del(&u->cmd_list); + spin_unlock_irqrestore(&vha->cmd_list_lock, flags); + kfree(u); + } +} + +void qlt_unknown_atio_work_fn(struct work_struct *work) +{ + struct scsi_qla_host *vha = container_of(to_delayed_work(work), + struct scsi_qla_host, unknown_atio_work); + + qlt_try_to_dequeue_unknown_atios(vha, 0); +} + +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]); + + + qlt_queue_unknown_atio(vha, atio, ha_locked); + break; + } + if (unlikely(!list_empty(&vha->unknown_atio_list))) + qlt_try_to_dequeue_unknown_atios(vha, ha_locked); + + 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; + + qlt_issue_marker(vha, ha_locked); + + 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; + } + + case VP_RPT_ID_IOCB_TYPE: + qla24xx_report_id_acquisition(vha, + (struct vp_rpt_id_entry_24xx *)atio); + break; + + case ABTS_RECV_24XX: + { + struct abts_recv_from_24xx *entry = + (struct abts_recv_from_24xx *)atio; + struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, + entry->vp_index); + unsigned long flags; + + if (unlikely(!host)) { + ql_dbg(ql_dbg_tgt, vha, 0xe00a, + "qla_target(%d): Response pkt (ABTS_RECV_24XX) " + "received, with unknown vp_index %d\n", + vha->vp_idx, entry->vp_index); + break; + } + if (!ha_locked) + spin_lock_irqsave(&host->hw->hardware_lock, flags); + qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio); + if (!ha_locked) + spin_unlock_irqrestore(&host->hw->hardware_lock, flags); + break; + } + + /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */ + + 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, + struct rsp_que *rsp, 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__); + /* fall through */ + 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, rsp, 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, rsp, 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, rsp, 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, rsp, 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, rsp, pkt); + break; + } + + default: + qlt_response_pkt(vha, rsp, pkt); + break; + } + +} + +/* + * All qlt_plogi_ack_t operations are protected by hardware_lock + */ +static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport, + struct imm_ntfy_from_isp *ntfy, int type) +{ + struct qla_work_evt *e; + e = qla2x00_alloc_work(vha, QLA_EVT_NACK); + if (!e) + return QLA_FUNCTION_FAILED; + + e->u.nack.fcport = fcport; + e->u.nack.type = type; + memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp)); + return qla2x00_post_work(vha, e); +} + +static +void qla2x00_async_nack_sp_done(void *s, int res) +{ + struct srb *sp = (struct srb *)s; + struct scsi_qla_host *vha = sp->vha; + unsigned long flags; + + ql_dbg(ql_dbg_disc, vha, 0x20f2, + "Async done-%s res %x %8phC type %d\n", + sp->name, res, sp->fcport->port_name, sp->type); + + spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); + sp->fcport->flags &= ~FCF_ASYNC_SENT; + sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset; + + switch (sp->type) { + case SRB_NACK_PLOGI: + sp->fcport->login_gen++; + sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP; + sp->fcport->logout_on_delete = 1; + sp->fcport->plogi_nack_done_deadline = jiffies + HZ; + sp->fcport->send_els_logo = 0; + break; + + case SRB_NACK_PRLI: + sp->fcport->fw_login_state = DSC_LS_PRLI_COMP; + sp->fcport->deleted = 0; + sp->fcport->send_els_logo = 0; + + if (!sp->fcport->login_succ && + !IS_SW_RESV_ADDR(sp->fcport->d_id)) { + sp->fcport->login_succ = 1; + + vha->fcport_count++; + spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); + qla24xx_sched_upd_fcport(sp->fcport); + spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); + } else { + sp->fcport->login_retry = 0; + sp->fcport->disc_state = DSC_LOGIN_COMPLETE; + sp->fcport->deleted = 0; + sp->fcport->logout_on_delete = 1; + } + break; + + case SRB_NACK_LOGO: + sp->fcport->login_gen++; + sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL; + qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE); + break; + } + spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); + + sp->free(sp); +} + +int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport, + struct imm_ntfy_from_isp *ntfy, int type) +{ + int rval = QLA_FUNCTION_FAILED; + srb_t *sp; + char *c = NULL; + + fcport->flags |= FCF_ASYNC_SENT; + switch (type) { + case SRB_NACK_PLOGI: + fcport->fw_login_state = DSC_LS_PLOGI_PEND; + c = "PLOGI"; + break; + case SRB_NACK_PRLI: + fcport->fw_login_state = DSC_LS_PRLI_PEND; + fcport->deleted = 0; + c = "PRLI"; + break; + case SRB_NACK_LOGO: + fcport->fw_login_state = DSC_LS_LOGO_PEND; + c = "LOGO"; + break; + } + + sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC); + if (!sp) + goto done; + + sp->type = type; + sp->name = "nack"; + + sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout; + qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2); + + sp->u.iocb_cmd.u.nack.ntfy = ntfy; + sp->done = qla2x00_async_nack_sp_done; + + rval = qla2x00_start_sp(sp); + if (rval != QLA_SUCCESS) + goto done_free_sp; + + ql_dbg(ql_dbg_disc, vha, 0x20f4, + "Async-%s %8phC hndl %x %s\n", + sp->name, fcport->port_name, sp->handle, c); + + return rval; + +done_free_sp: + sp->free(sp); +done: + fcport->flags &= ~FCF_ASYNC_SENT; + return rval; +} + +void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e) +{ + fc_port_t *t; + + switch (e->u.nack.type) { + case SRB_NACK_PRLI: + mutex_lock(&vha->vha_tgt.tgt_mutex); + t = qlt_create_sess(vha, e->u.nack.fcport, 0); + mutex_unlock(&vha->vha_tgt.tgt_mutex); + if (t) { + ql_log(ql_log_info, vha, 0xd034, + "%s create sess success %p", __func__, t); + /* create sess has an extra kref */ + vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport); + } + break; + } + qla24xx_async_notify_ack(vha, e->u.nack.fcport, + (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type); +} + +void qla24xx_delete_sess_fn(struct work_struct *work) +{ + fc_port_t *fcport = container_of(work, struct fc_port, del_work); + struct qla_hw_data *ha = fcport->vha->hw; + + if (fcport->se_sess) { + ha->tgt.tgt_ops->shutdown_sess(fcport); + ha->tgt.tgt_ops->put_sess(fcport); + } else { + qlt_unreg_sess(fcport); + } +} + +/* + * 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 fc_port *sess = fcport; + unsigned long flags; + + if (!vha->hw->tgt.tgt_ops) + return; + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + if (tgt->tgt_stop) { + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + return; + } + + if (fcport->disc_state == DSC_DELETE_PEND) { + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + return; + } + + if (!sess->se_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 (fcport->fw_login_state == DSC_LS_PRLI_COMP) { + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + return; + } + + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_disc, vha, 0x2107, + "%s: kref_get fail sess %8phC \n", + __func__, sess->port_name); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + return; + } + + 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; + } + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + ha->tgt.tgt_ops->put_sess(sess); +} + +/* + * 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 struct qlt_plogi_ack_t * +qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id, + struct imm_ntfy_from_isp *iocb) +{ + struct qlt_plogi_ack_t *pla; + + list_for_each_entry(pla, &vha->plogi_ack_list, list) { + if (pla->id.b24 == id->b24) { + ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d, + "%s %d %8phC Term INOT due to new INOT", + __func__, __LINE__, + pla->iocb.u.isp24.port_name); + qlt_send_term_imm_notif(vha, &pla->iocb, 1); + memcpy(&pla->iocb, iocb, sizeof(pla->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; + } + + memcpy(&pla->iocb, iocb, sizeof(pla->iocb)); + pla->id = *id; + list_add_tail(&pla->list, &vha->plogi_ack_list); + + return pla; +} + +void qlt_plogi_ack_unref(struct scsi_qla_host *vha, + struct qlt_plogi_ack_t *pla) +{ + struct imm_ntfy_from_isp *iocb = &pla->iocb; + port_id_t port_id; + uint16_t loop_id; + fc_port_t *fcport = pla->fcport; + + BUG_ON(!pla->ref_count); + pla->ref_count--; + + if (pla->ref_count) + return; + + ql_dbg(ql_dbg_disc, vha, 0x5089, + "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x" + " exch %#x ox_id %#x\n", iocb->u.isp24.port_name, + iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1], + iocb->u.isp24.port_id[0], + le16_to_cpu(iocb->u.isp24.nport_handle), + iocb->u.isp24.exchange_address, iocb->ox_id); + + 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); + + fcport->loop_id = loop_id; + fcport->d_id = port_id; + if (iocb->u.isp24.status_subcode == ELS_PLOGI) + qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI); + else + qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI); + + list_for_each_entry(fcport, &vha->vp_fcports, list) { + if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla) + fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL; + if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla) + fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL; + } + + list_del(&pla->list); + kmem_cache_free(qla_tgt_plogi_cachep, pla); +} + +void +qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla, + struct fc_port *sess, enum qlt_plogi_link_t link) +{ + struct imm_ntfy_from_isp *iocb = &pla->iocb; + /* Inc ref_count first because link might already be pointing at pla */ + pla->ref_count++; + + 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 pla %p link %d\n", + sess, link, sess->port_name, + iocb->u.isp24.port_name, iocb->u.isp24.port_id[2], + iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0], + pla->ref_count, pla, link); + + if (link == QLT_PLOGI_LINK_CONFLICT) { + switch (sess->disc_state) { + case DSC_DELETED: + case DSC_DELETE_PEND: + pla->ref_count--; + return; + default: + break; + } + } + + if (sess->plogi_link[link]) + qlt_plogi_ack_unref(vha, sess->plogi_link[link]); + + if (link == QLT_PLOGI_LINK_SAME_WWN) + pla->fcport = sess; + + 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); +} + +void qlt_free_session_done(struct work_struct *work) +{ + struct fc_port *sess = container_of(work, struct fc_port, + 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; + scsi_qla_host_t *base_vha; + struct qlt_plogi_ack_t *own = + sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]; + + 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->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa, + sess->logout_on_delete, sess->keep_nport_handle, + sess->send_els_logo); + + if (!IS_SW_RESV_ADDR(sess->d_id)) { + qla2x00_mark_device_lost(vha, sess, 0, 0); + + if (sess->send_els_logo) { + qlt_port_logo_t logo; + + logo.id = sess->d_id; + logo.cmd_count = 0; + if (!own) + qlt_send_first_logo(vha, &logo); + sess->send_els_logo = 0; + } + + if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) { + int rc; + + if (!own || + (own && + (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) { + rc = qla2x00_post_async_logout_work(vha, sess, + 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; + } else if (own && (own->iocb.u.isp24.status_subcode == + ELS_PRLI) && ha->flags.rida_fmt2) { + rc = qla2x00_post_async_prlo_work(vha, sess, + NULL); + if (rc != QLA_SUCCESS) + ql_log(ql_log_warn, vha, 0xf085, + "Schedule PRLO 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 (!READ_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_disc, vha, 0xf087, + "%s: sess %p logout completed\n", __func__, sess); + } + + if (sess->logo_ack_needed) { + sess->logo_ack_needed = 0; + qla24xx_async_notify_ack(vha, sess, + (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO); + } + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + if (sess->se_sess) { + sess->se_sess = NULL; + if (tgt && !IS_SW_RESV_ADDR(sess->d_id)) + tgt->sess_count--; + } + + sess->disc_state = DSC_DELETED; + sess->fw_login_state = DSC_LS_PORT_UNAVAIL; + sess->deleted = QLA_SESS_DELETED; + + if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) { + vha->fcport_count--; + sess->login_succ = 0; + } + + qla2x00_clear_loop_id(sess); + + if (sess->conflict) { + sess->conflict->login_pause = 0; + sess->conflict = NULL; + if (!test_bit(UNLOADING, &vha->dpc_flags)) + set_bit(RELOGIN_NEEDED, &vha->dpc_flags); + } + + { + struct qlt_plogi_ack_t *con = + sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]; + struct imm_ntfy_from_isp *iocb; + own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]; + + if (con) { + iocb = &con->iocb; + 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, + iocb->u.isp24.port_name, con->ref_count); + qlt_plogi_ack_unref(vha, con); + sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL; + } 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) { + sess->fw_login_state = DSC_LS_PLOGI_PEND; + qlt_plogi_ack_unref(vha, own); + sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL; + } + } + + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, + "Unregistration of sess %p %8phC finished fcp_cnt %d\n", + sess, sess->port_name, vha->fcport_count); + + if (tgt && (tgt->sess_count == 0)) + wake_up_all(&tgt->waitQ); + + if (vha->fcport_count == 0) + wake_up_all(&vha->fcport_waitQ); + + base_vha = pci_get_drvdata(ha->pdev); + + sess->free_pending = 0; + + if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags)) + return; + + if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) { + switch (vha->host->active_mode) { + case MODE_INITIATOR: + case MODE_DUAL: + set_bit(RELOGIN_NEEDED, &vha->dpc_flags); + qla2xxx_wake_dpc(vha); + break; + case MODE_TARGET: + default: + /* no-op */ + break; + } + } +} + +/* ha->tgt.sess_lock supposed to be held on entry */ +void qlt_unreg_sess(struct fc_port *sess) +{ + struct scsi_qla_host *vha = sess->vha; + unsigned long flags; + + ql_dbg(ql_dbg_disc, sess->vha, 0x210a, + "%s sess %p for deletion %8phC\n", + __func__, sess, sess->port_name); + + spin_lock_irqsave(&sess->vha->work_lock, flags); + if (sess->free_pending) { + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + return; + } + sess->free_pending = 1; + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + + if (sess->se_sess) + vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); + + sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; + sess->disc_state = DSC_DELETE_PEND; + sess->last_rscn_gen = sess->rscn_gen; + sess->last_login_gen = sess->login_gen; + + if (sess->nvme_flag & NVME_FLAG_REGISTERED && + !(sess->nvme_flag & NVME_FLAG_DELETING)) { + sess->nvme_flag |= NVME_FLAG_DELETING; + schedule_work(&sess->nvme_del_work); + } else { + INIT_WORK(&sess->free_work, qlt_free_session_done); + schedule_work(&sess->free_work); + } +} +EXPORT_SYMBOL(qlt_unreg_sess); + +static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) +{ + struct qla_hw_data *ha = vha->hw; + struct fc_port *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); + } 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); +} + +static void qla24xx_chk_fcp_state(struct fc_port *sess) +{ + if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) { + sess->logout_on_delete = 0; + sess->logo_ack_needed = 0; + sess->fw_login_state = DSC_LS_PORT_UNAVAIL; + } +} + +void qlt_schedule_sess_for_deletion(struct fc_port *sess) +{ + struct qla_tgt *tgt = sess->tgt; + unsigned long flags; + u16 sec; + + switch (sess->disc_state) { + case DSC_DELETE_PEND: + return; + case DSC_DELETED: + if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] && + !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) { + if (tgt && tgt->tgt_stop && tgt->sess_count == 0) + wake_up_all(&tgt->waitQ); + + if (sess->vha->fcport_count == 0) + wake_up_all(&sess->vha->fcport_waitQ); + return; + } + break; + case DSC_UPD_FCPORT: + /* + * This port is not done reporting to upper layer. + * let it finish + */ + sess->next_disc_state = DSC_DELETE_PEND; + sec = jiffies_to_msecs(jiffies - + sess->jiffies_at_registration)/1000; + if (sess->sec_since_registration < sec && sec && !(sec % 5)) { + sess->sec_since_registration = sec; + ql_dbg(ql_dbg_disc, sess->vha, 0xffff, + "%s %8phC : Slow Rport registration(%d Sec)\n", + __func__, sess->port_name, sec); + } + return; + default: + break; + } + + if (sess->deleted == QLA_SESS_DELETED) + sess->logout_on_delete = 0; + + spin_lock_irqsave(&sess->vha->work_lock, flags); + if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + return; + } + sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; + spin_unlock_irqrestore(&sess->vha->work_lock, flags); + + sess->disc_state = DSC_DELETE_PEND; + + qla24xx_chk_fcp_state(sess); + + ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, + "Scheduling sess %p for deletion %8phC\n", + sess, sess->port_name); + + WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work)); +} + +static void qlt_clear_tgt_db(struct qla_tgt *tgt) +{ + struct fc_port *sess; + scsi_qla_host_t *vha = tgt->vha; + + list_for_each_entry(sess, &vha->vp_fcports, list) { + if (sess->se_sess) + qlt_schedule_sess_for_deletion(sess); + } + + /* 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 = qla24xx_gidlist_wait(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; +} + +/* + * Adds an extra ref to allow to drop hw lock after adding sess to the list. + * Caller must put it. + */ +static struct fc_port *qlt_create_sess( + struct scsi_qla_host *vha, + fc_port_t *fcport, + bool local) +{ + struct qla_hw_data *ha = vha->hw; + struct fc_port *sess = fcport; + unsigned long flags; + + if (vha->vha_tgt.qla_tgt->tgt_stop) + return NULL; + + if (fcport->se_sess) { + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_disc, vha, 0x20f6, + "%s: kref_get_unless_zero failed for %8phC\n", + __func__, sess->port_name); + return NULL; + } + return fcport; + } + sess->tgt = vha->vha_tgt.qla_tgt; + sess->local = local; + + /* + * 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; + sess->logout_completed = 0; + + if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, + &fcport->port_name[0], sess) < 0) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015, + "(%d) %8phC check_initiator_node_acl failed\n", + vha->vp_idx, fcport->port_name); + return NULL; + } else { + kref_init(&fcport->sess_kref); + /* + * Take an extra reference to ->sess_kref here to handle + * fc_port access across ->tgt.sess_lock reaquire. + */ + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_disc, vha, 0x20f7, + "%s: kref_get_unless_zero failed for %8phC\n", + __func__, sess->port_name); + return NULL; + } + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + if (!IS_SW_RESV_ADDR(sess->d_id)) + 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, 0xf006, + "Adding sess %p se_sess %p to tgt %p sess_count %d\n", + sess, sess->se_sess, vha->vha_tgt.qla_tgt, + vha->vha_tgt.qla_tgt->sess_count); + + 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->d_id.b.domain, sess->d_id.b.area, + sess->d_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); + + return sess; +} + +/* + * 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 fc_port *sess = fcport; + 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; + } + if (!sess->se_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; + spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); + qlt_schedule_sess_for_deletion(sess); +} + +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->tgt.sess_lock, flags); + ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, + "tgt %p, sess_count=%d\n", + tgt, tgt->sess_count); + res = (tgt->sess_count == 0); + spin_unlock_irqrestore(&ha->tgt.sess_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); + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021, + "NPIV is in use. Can not stop target\n"); + 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_mgt, 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); + tgt->tgt_stop = 1; + qlt_clear_tgt_db(tgt); + mutex_unlock(&vha->vha_tgt.tgt_mutex); + mutex_unlock(&qla_tgt_mutex); + + 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: sess_count=%d\n", tgt, tgt->sess_count); + + wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ); + + /* Big hammer */ + if (!ha->flags.host_shutting_down && + (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))) + qlt_disable_vha(vha); + + /* Wait for sessions to clear out (just in case) */ + wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ); + return 0; +} +EXPORT_SYMBOL(qlt_stop_phase1); + +/* Called by tcm_qla2xxx configfs code */ +void qlt_stop_phase2(struct qla_tgt *tgt) +{ + scsi_qla_host_t *vha = tgt->vha; + + if (tgt->tgt_stopped) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, + "Already in tgt->tgt_stopped state\n"); + dump_stack(); + return; + } + if (!tgt->tgt_stop) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, + "%s: phase1 stop is not completed\n", __func__); + dump_stack(); + return; + } + + mutex_lock(&tgt->ha->optrom_mutex); + mutex_lock(&vha->vha_tgt.tgt_mutex); + tgt->tgt_stop = 0; + tgt->tgt_stopped = 1; + 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\n", + 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; + void *node; + u64 key = 0; + u16 i; + struct qla_qpair_hint *h; + struct qla_hw_data *ha = vha->hw; + + if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop && + !tgt->tgt_stopped) + qlt_stop_phase1(tgt); + + if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) + qlt_stop_phase2(tgt); + + for (i = 0; i < vha->hw->max_qpairs + 1; i++) { + unsigned long flags; + + h = &tgt->qphints[i]; + if (h->qpair) { + spin_lock_irqsave(h->qpair->qp_lock_ptr, flags); + list_del(&h->hint_elem); + spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags); + h->qpair = NULL; + } + } + kfree(tgt->qphints); + mutex_lock(&qla_tgt_mutex); + list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); + mutex_unlock(&qla_tgt_mutex); + + btree_for_each_safe64(&tgt->lun_qpair_map, key, node) + btree_remove64(&tgt->lun_qpair_map, key); + + btree_destroy64(&tgt->lun_qpair_map); + + if (vha->vp_idx) + if (ha->tgt.tgt_ops && + ha->tgt.tgt_ops->remove_target && + vha->vha_tgt.target_lport_ptr) + ha->tgt.tgt_ops->remove_target(vha); + + 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 qla_qpair *qpair, + 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 scsi_qla_host *vha = qpair->vha; + struct qla_hw_data *ha = vha->hw; + request_t *pkt; + struct nack_to_isp *nack; + + if (!ha->flags.fw_started) + return; + + ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); + + pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, 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.handle = QLA_TGT_SKIP_HANDLE; + 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, qpair->req); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair, + struct abts_recv_from_24xx *abts, uint32_t status, + bool ids_reversed) +{ + struct scsi_qla_host *vha = qpair->vha; + 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); + + resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, + 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(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->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); + + ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready( + vha->hw->base_qpair, 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->hw->base_qpair, + (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; + unsigned long flags; + + spin_lock_irqsave(&vha->cmd_list_lock, flags); + 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_irqrestore(&vha->cmd_list_lock, flags); + return 1; + } + } + + list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) { + if (tag == op->atio.u.isp24.exchange_addr) { + op->aborted = true; + spin_unlock_irqrestore(&vha->cmd_list_lock, flags); + 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_irqrestore(&vha->cmd_list_lock, flags); + return 1; + } + } + spin_unlock_irqrestore(&vha->cmd_list_lock, flags); + + 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, + u64 lun, uint8_t *s_id) +{ + struct qla_tgt_sess_op *op; + struct qla_tgt_cmd *cmd; + uint32_t key; + unsigned long flags; + + key = sid_to_key(s_id); + spin_lock_irqsave(&vha->cmd_list_lock, flags); + list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { + uint32_t op_key; + u64 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(op, &vha->unknown_atio_list, cmd_list) { + uint32_t op_key; + u64 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; + u64 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_irqrestore(&vha->cmd_list_lock, flags); +} + +static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha, + uint64_t unpacked_lun) +{ + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + struct qla_qpair_hint *h = NULL; + + if (vha->flags.qpairs_available) { + h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun); + if (!h) + h = &tgt->qphints[0]; + } else { + h = &tgt->qphints[0]; + } + + return h; +} + +static void qlt_do_tmr_work(struct work_struct *work) +{ + struct qla_tgt_mgmt_cmd *mcmd = + container_of(work, struct qla_tgt_mgmt_cmd, work); + struct qla_hw_data *ha = mcmd->vha->hw; + int rc = EIO; + uint32_t tag; + unsigned long flags; + + switch (mcmd->tmr_func) { + case QLA_TGT_ABTS: + tag = mcmd->orig_iocb.abts.exchange_addr_to_abort; + break; + default: + tag = 0; + break; + } + + rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun, + mcmd->tmr_func, tag); + + if (rc != 0) { + spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags); + switch (mcmd->tmr_func) { + case QLA_TGT_ABTS: + qlt_24xx_send_abts_resp(mcmd->qpair, + &mcmd->orig_iocb.abts, + FCP_TMF_REJECTED, false); + break; + case QLA_TGT_LUN_RESET: + case QLA_TGT_CLEAR_TS: + case QLA_TGT_ABORT_TS: + case QLA_TGT_CLEAR_ACA: + case QLA_TGT_TARGET_RESET: + qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio, + qla_sam_status); + break; + + case QLA_TGT_ABORT_ALL: + case QLA_TGT_NEXUS_LOSS_SESS: + case QLA_TGT_NEXUS_LOSS: + qlt_send_notify_ack(mcmd->qpair, + &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0); + break; + } + spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags); + + ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052, + "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", + mcmd->vha->vp_idx, rc); + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); + } +} + +/* 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 fc_port *sess) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_mgmt_cmd *mcmd; + struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0]; + + if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { + /* send TASK_ABORT response immediately */ + qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false); + return 0; + } + + 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 = ha->base_qpair->chip_reset; + mcmd->tmr_func = QLA_TGT_ABTS; + mcmd->qpair = h->qpair; + mcmd->vha = vha; + + /* + * LUN is looked up by target-core internally based on the passed + * abts->exchange_addr_to_abort tag. + */ + mcmd->se_cmd.cpuid = h->cpuid; + + if (ha->tgt.tgt_ops->find_cmd_by_tag) { + struct qla_tgt_cmd *abort_cmd; + + abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess, + abts->exchange_addr_to_abort); + if (abort_cmd && abort_cmd->qpair) { + mcmd->qpair = abort_cmd->qpair; + mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid; + } + } + + INIT_WORK(&mcmd->work, qlt_do_tmr_work); + queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work); + + 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 fc_port *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(ha->base_qpair, 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(ha->base_qpair, 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-existent session\n", + vha->vp_idx); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED, + false); + return; + } + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + + if (sess->deleted) { + qlt_24xx_send_abts_resp(ha->base_qpair, 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(ha->base_qpair, 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 qla_qpair *qpair, + struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) +{ + struct scsi_qla_host *ha = mcmd->vha; + 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); + + + ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, 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; + temp = (atio->u.isp24.attr << 9)| + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS; + ctio->u.status1.flags = cpu_to_le16(temp); + 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(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(ha, qpair->req); +} + +void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) +{ + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); +} +EXPORT_SYMBOL(qlt_free_mcmd); + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then + * reacquire + */ +void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd, + uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq) +{ + struct atio_from_isp *atio = &cmd->atio; + struct ctio7_to_24xx *ctio; + uint16_t temp; + struct scsi_qla_host *vha = cmd->vha; + + ql_dbg(ql_dbg_tgt_dif, vha, 0x3066, + "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, " + "sense_key=%02x, asc=%02x, ascq=%02x", + vha, atio, scsi_status, sense_key, asc, ascq); + + ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL); + if (!ctio) { + ql_dbg(ql_dbg_async, vha, 0x3067, + "qla2x00t(%ld): %s failed: unable to allocate request packet", + vha->host_no, __func__); + goto out; + } + + ctio->entry_type = CTIO_TYPE7; + ctio->entry_count = 1; + ctio->handle = QLA_TGT_SKIP_HANDLE; + ctio->nport_handle = cmd->sess->loop_id; + ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); + ctio->vp_index = vha->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; + temp = (atio->u.isp24.attr << 9) | + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS; + ctio->u.status1.flags = cpu_to_le16(temp); + 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 | scsi_status); + ctio->u.status1.response_len = cpu_to_le16(18); + ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio)); + + if (ctio->u.status1.residual != 0) + ctio->u.status1.scsi_status |= + cpu_to_le16(SS_RESIDUAL_UNDER); + + /* Fixed format sense data. */ + ctio->u.status1.sense_data[0] = 0x70; + ctio->u.status1.sense_data[2] = sense_key; + /* Additional sense length */ + ctio->u.status1.sense_data[7] = 0xa; + /* ASC and ASCQ */ + ctio->u.status1.sense_data[12] = asc; + ctio->u.status1.sense_data[13] = ascq; + + /* Memory Barrier */ + wmb(); + + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->req); + +out: + return; +} + +/* 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; + struct qla_qpair *qpair = mcmd->qpair; + + 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(qpair->qp_lock_ptr, flags); + + if (!vha->flags.online || mcmd->reset_count != qpair->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, qpair->chip_reset); + ha->tgt.tgt_ops->free_mcmd(mcmd); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + return; + } + + if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) { + if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode == + ELS_LOGO || + mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode == + ELS_PRLO || + mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode == + ELS_TPRLO) { + ql_dbg(ql_dbg_disc, vha, 0x2106, + "TM response logo %8phC status %#x state %#x", + mcmd->sess->port_name, mcmd->fc_tm_rsp, + mcmd->flags); + qlt_schedule_sess_for_deletion(mcmd->sess); + } else { + qlt_send_notify_ack(vha->hw->base_qpair, + &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(qpair, &mcmd->orig_iocb.abts, + mcmd->fc_tm_rsp, false); + else + qlt_24xx_send_task_mgmt_ctio(qpair, 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(qpair->qp_lock_ptr, 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(cmd->qpair->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 > QLA_TGT_DATASEGS_PER_CMD_24XX) + prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - + QLA_TGT_DATASEGS_PER_CMD_24XX, + QLA_TGT_DATASEGS_PER_CONT_24XX); + } 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(cmd->qpair->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_qp(ql_dbg_tgt, prm->cmd->qpair, 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; + struct qla_qpair *qpair; + if (!cmd->sg_mapped) + return; + + qpair = cmd->qpair; + + pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt, + cmd->dma_data_direction); + cmd->sg_mapped = 0; + + if (cmd->prot_sg_cnt) + pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt, + cmd->dma_data_direction); + + if (!cmd->ctx) + return; + ha = vha->hw; + if (cmd->ctx_dsd_alloced) + qla2x00_clean_dsd_pool(ha, cmd->ctx); + + dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); +} + +static int qlt_check_reserve_free_req(struct qla_qpair *qpair, + uint32_t req_cnt) +{ + uint32_t cnt; + struct req_que *req = qpair->req; + + if (req->cnt < (req_cnt + 2)) { + cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr : + RD_REG_DWORD_RELAXED(req->req_q_out)); + + if (req->ring_index < cnt) + req->cnt = cnt - req->ring_index; + else + req->cnt = req->length - (req->ring_index - cnt); + + if (unlikely(req->cnt < (req_cnt + 2))) + return -EAGAIN; + } + + 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 req_que *req) +{ + /* Adjust ring index. */ + req->ring_index++; + if (req->ring_index == req->length) { + req->ring_index = 0; + req->ring_ptr = req->ring; + } else { + req->ring_ptr++; + } + return (cont_entry_t *)req->ring_ptr; +} + +/* ha->hardware_lock supposed to be held on entry */ +static inline uint32_t qlt_make_handle(struct qla_qpair *qpair) +{ + uint32_t h; + int index; + uint8_t found = 0; + struct req_que *req = qpair->req; + + h = req->current_outstanding_cmd; + + for (index = 1; index < req->num_outstanding_cmds; index++) { + h++; + if (h == req->num_outstanding_cmds) + h = 1; + + if (h == QLA_TGT_SKIP_HANDLE) + continue; + + if (!req->outstanding_cmds[h]) { + found = 1; + break; + } + } + + if (found) { + req->current_outstanding_cmd = h; + } else { + ql_dbg(ql_dbg_io, qpair->vha, 0x305b, + "qla_target(%d): Ran out of empty cmd slots\n", + qpair->vha->vp_idx); + h = QLA_TGT_NULL_HANDLE; + } + + return h; +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair, + struct qla_tgt_prm *prm) +{ + uint32_t h; + struct ctio7_to_24xx *pkt; + struct atio_from_isp *atio = &prm->cmd->atio; + uint16_t temp; + + pkt = (struct ctio7_to_24xx *)qpair->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 = prm->cmd->vp_idx; + + h = qlt_make_handle(qpair); + 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 + qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd; + + pkt->handle = MAKE_HANDLE(qpair->req->id, h); + pkt->handle |= CTIO_COMPLETION_HANDLE_MARK; + pkt->nport_handle = cpu_to_le16(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; + temp = atio->u.isp24.attr << 9; + pkt->u.status0.flags |= cpu_to_le16(temp); + 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) +{ + int cnt; + uint32_t *dword_ptr; + + /* Build continuation packets */ + while (prm->seg_cnt > 0) { + cont_a64_entry_t *cont_pkt64 = + (cont_a64_entry_t *)qlt_get_req_pkt( + prm->cmd->qpair->req); + + /* + * 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; + + cont_pkt64->entry_type = CONTINUE_A64_TYPE; + dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address; + + /* Load continuation entry data segments */ + for (cnt = 0; + cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt; + cnt++, prm->seg_cnt--) { + *dword_ptr++ = + cpu_to_le32(pci_dma_lo32 + (sg_dma_address(prm->sg))); + *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) +{ + int cnt; + uint32_t *dword_ptr; + 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 < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt; + cnt++, prm->seg_cnt--) { + *dword_ptr++ = + cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); + + *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); +} + +static inline int qlt_has_data(struct qla_tgt_cmd *cmd) +{ + return cmd->bufflen > 0; +} + +static void qlt_print_dif_err(struct qla_tgt_prm *prm) +{ + struct qla_tgt_cmd *cmd; + struct scsi_qla_host *vha; + + /* asc 0x10=dif error */ + if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) { + cmd = prm->cmd; + vha = cmd->vha; + /* ASCQ */ + switch (prm->sense_buffer[13]) { + case 1: + ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b, + "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] " + "se_cmd=%p tag[%x]", + cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd, + cmd->atio.u.isp24.exchange_addr); + break; + case 2: + ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c, + "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] " + "se_cmd=%p tag[%x]", + cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd, + cmd->atio.u.isp24.exchange_addr); + break; + case 3: + ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f, + "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] " + "se_cmd=%p tag[%x]", + cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd, + cmd->atio.u.isp24.exchange_addr); + break; + default: + ql_dbg(ql_dbg_tgt_dif, vha, 0xe010, + "BE detected Dif ERR: lba[%llx|%lld] len[%x] " + "se_cmd=%p tag[%x]", + cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd, + cmd->atio.u.isp24.exchange_addr); + break; + } + ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16); + } +} + +/* + * 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 se_cmd *se_cmd = &cmd->se_cmd; + struct qla_qpair *qpair = cmd->qpair; + + prm->cmd = cmd; + prm->tgt = cmd->tgt; + prm->pkt = NULL; + 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->residual = 0; + prm->add_status_pkt = 0; + prm->prot_sg = NULL; + prm->prot_seg_cnt = 0; + prm->tot_dsds = 0; + + 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_qp(ql_dbg_io + ql_dbg_verbose, qpair, 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_qp(ql_dbg_io, qpair, 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(cmd->vha->hw) && + (prm->rq_result != 0))) { + prm->add_status_pkt = 1; + (*full_req_cnt)++; + } + } + } + + return 0; +} + +static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd, + int sending_sense) +{ + if (cmd->qpair->enable_class_2) + return 0; + + if (sending_sense) + return cmd->conf_compl_supported; + else + return cmd->qpair->enable_explicit_conf && + cmd->conf_compl_supported; +} + +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->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->cmd, 1)) { + if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) { + ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 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]); + + qlt_print_dif_err(prm); + + } 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 ??? */ +} + +static inline int +qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) +{ + 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; +} + +static inline int +qla_tgt_ref_mask_check(struct se_cmd *se_cmd) +{ + switch (se_cmd->prot_op) { + case TARGET_PROT_DIN_INSERT: + case TARGET_PROT_DOUT_INSERT: + case TARGET_PROT_DIN_STRIP: + case TARGET_PROT_DOUT_STRIP: + case TARGET_PROT_DIN_PASS: + case TARGET_PROT_DOUT_PASS: + return 1; + default: + return 0; + } + return 0; +} + +/* + * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command + */ +static void +qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx, + uint16_t *pfw_prot_opts) +{ + struct se_cmd *se_cmd = &cmd->se_cmd; + uint32_t lba = 0xffffffff & se_cmd->t_task_lba; + scsi_qla_host_t *vha = cmd->tgt->vha; + struct qla_hw_data *ha = vha->hw; + uint32_t t32 = 0; + + /* + * wait till 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; + + if (IS_PI_UNINIT_CAPABLE(ha)) { + if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || + (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) + *pfw_prot_opts |= PO_DIS_VALD_APP_ESC; + else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) + *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; + } + + t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts); + + 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); + /* 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; + case TARGET_DIF_TYPE1_PROT: + /* + * For TYPE 1 protection: 16 bit GUARD tag, 32 bit + * REF tag, and 16 bit app tag. + */ + ctx->ref_tag = cpu_to_le32(lba); + if (!qla_tgt_ref_mask_check(se_cmd) || + !(ha->tgt.tgt_ops->chk_dif_tags(t32))) { + *pfw_prot_opts |= PO_DIS_REF_TAG_VALD; + 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; + case TARGET_DIF_TYPE2_PROT: + /* + * For TYPE 2 protection: 16 bit GUARD + 32 bit REF + * tag has to match LBA in CDB + N + */ + ctx->ref_tag = cpu_to_le32(lba); + if (!qla_tgt_ref_mask_check(se_cmd) || + !(ha->tgt.tgt_ops->chk_dif_tags(t32))) { + *pfw_prot_opts |= PO_DIS_REF_TAG_VALD; + 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; + case TARGET_DIF_TYPE3_PROT: + /* For TYPE 3 protection: 16 bit GUARD only */ + *pfw_prot_opts |= PO_DIS_REF_TAG_VALD; + 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_qpair *qpair, struct qla_tgt_prm *prm) +{ + uint32_t *cur_dsd; + uint32_t transfer_length = 0; + uint32_t data_bytes; + uint32_t dif_bytes; + uint8_t bundling = 1; + 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; + struct qla_tc_param tc; + uint16_t t16; + scsi_qla_host_t *vha = cmd->vha; + + ha = vha->hw; + + pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr; + prm->pkt = pkt; + memset(pkt, 0, sizeof(*pkt)); + + ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071, + "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", + cmd->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; + if (cmd->prot_sg_cnt) + 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 = cmd->vp_idx; + + h = qlt_make_handle(qpair); + 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 + qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd; + + pkt->handle = MAKE_HANDLE(qpair->req->id, h); + pkt->handle |= CTIO_COMPLETION_HANDLE_MARK; + pkt->nport_handle = cpu_to_le16(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_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); + + if (!crc_ctx_pkt) + goto crc_queuing_error; + + 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; + + qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts); + + 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); + + memset((uint8_t *)&tc, 0 , sizeof(tc)); + tc.vha = vha; + tc.blk_sz = cmd->blk_sz; + tc.bufflen = cmd->bufflen; + tc.sg = cmd->sg; + tc.prot_sg = cmd->prot_sg; + tc.ctx = crc_ctx_pkt; + tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced; + + /* 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, &tc)) + goto crc_queuing_error; + } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, + (prm->tot_dsds - prm->prot_seg_cnt), &tc)) + 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, &tc)) + goto crc_queuing_error; + } + return QLA_SUCCESS; + +crc_queuing_error: + /* Cleanup will be performed by the caller */ + qpair->req->outstanding_cmds[h] = NULL; + + 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_qpair *qpair = cmd->qpair; + struct ctio7_to_24xx *pkt; + struct qla_tgt_prm prm; + uint32_t full_req_cnt = 0; + unsigned long flags = 0; + int res; + + if (cmd->sess && cmd->sess->deleted) { + 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(qpair, cmd, &cmd->atio, 0, 0); + return 0; + } + + ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018, + "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n", + (xmit_type & QLA_TGT_XMIT_STATUS) ? + 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, + &cmd->se_cmd, qpair->id); + + res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, + &full_req_cnt); + if (unlikely(res != 0)) { + return res; + } + + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + + if (xmit_type == QLA_TGT_XMIT_STATUS) + qpair->tgt_counters.core_qla_snd_status++; + else + qpair->tgt_counters.core_qla_que_buf++; + + if (!qpair->fw_started || cmd->reset_count != qpair->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_qp(ql_dbg_async, qpair, 0xe101, + "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n", + vha->flags.online, qla2x00_reset_active(vha), + cmd->reset_count, qpair->chip_reset); + res = 0; + goto out_unmap_unlock; + } + + /* Does F/W have an IOCBs for this request */ + res = qlt_check_reserve_free_req(qpair, 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(qpair, &prm); + else + res = qlt_24xx_build_ctio_pkt(qpair, &prm); + if (unlikely(res != 0)) { + qpair->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); + + 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(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( + qpair->req); + + ql_dbg_qp(ql_dbg_tgt, qpair, 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); + } + } 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(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->req); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + + return 0; + +out_unmap_unlock: + qlt_unmap_sg(vha, cmd); + spin_unlock_irqrestore(qpair->qp_lock_ptr, 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_tgt *tgt = cmd->tgt; + struct qla_tgt_prm prm; + unsigned long flags = 0; + int res = 0; + struct qla_qpair *qpair = cmd->qpair; + + memset(&prm, 0, sizeof(prm)); + prm.cmd = cmd; + prm.tgt = tgt; + prm.sg = NULL; + prm.req_cnt = 1; + + if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) || + (cmd->sess && cmd->sess->deleted)) { + /* + * 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_qp(ql_dbg_async, qpair, 0xe102, + "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n", + vha->flags.online, qla2x00_reset_active(vha), + cmd->reset_count, qpair->chip_reset); + return 0; + } + + /* Calculate number of entries and segments required */ + if (qlt_pci_map_calc_cnt(&prm) != 0) + return -EAGAIN; + + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + /* Does F/W have an IOCBs for this request */ + res = qlt_check_reserve_free_req(qpair, prm.req_cnt); + if (res != 0) + goto out_unlock_free_unmap; + if (cmd->se_cmd.prot_op) + res = qlt_build_ctio_crc2_pkt(qpair, &prm); + else + res = qlt_24xx_build_ctio_pkt(qpair, &prm); + + if (unlikely(res != 0)) { + qpair->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); + + cmd->state = QLA_TGT_STATE_NEED_DATA; + cmd->cmd_sent_to_fw = 1; + + /* Memory Barrier */ + wmb(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->req); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + + return res; + +out_unlock_free_unmap: + qlt_unmap_sg(vha, cmd); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + + return res; +} +EXPORT_SYMBOL(qlt_rdy_to_xfer); + + +/* + * it is assumed either hardware_lock or qpair lock is held. + */ +static void +qlt_handle_dif_error(struct qla_qpair *qpair, 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]; + uint64_t lba = cmd->se_cmd.t_task_lba; + uint8_t scsi_status, sense_key, asc, ascq; + unsigned long flags; + struct scsi_qla_host *vha = cmd->vha; + + cmd->trc_flags |= TRC_DIF_ERR; + + cmd->a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); + cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); + cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); + + cmd->e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); + cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); + cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); + + ql_dbg(ql_dbg_tgt_dif, vha, 0xf075, + "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state); + + scsi_status = sense_key = asc = ascq = 0; + + /* check appl tag */ + if (cmd->e_app_tag != cmd->a_app_tag) { + ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d, + "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]", + cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks, + cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag, + cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd, + cmd->atio.u.isp24.fcp_hdr.ox_id); + + cmd->dif_err_code = DIF_ERR_APP; + scsi_status = SAM_STAT_CHECK_CONDITION; + sense_key = ABORTED_COMMAND; + asc = 0x10; + ascq = 0x2; + } + + /* check ref tag */ + if (cmd->e_ref_tag != cmd->a_ref_tag) { + ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e, + "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ", + cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks, + cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag, + cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd, + cmd->atio.u.isp24.fcp_hdr.ox_id); + + cmd->dif_err_code = DIF_ERR_REF; + scsi_status = SAM_STAT_CHECK_CONDITION; + sense_key = ABORTED_COMMAND; + asc = 0x10; + ascq = 0x3; + goto out; + } + + /* check guard */ + if (cmd->e_guard != cmd->a_guard) { + ql_dbg(ql_dbg_tgt_dif, vha, 0xe012, + "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]", + cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks, + cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag, + cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd, + cmd->atio.u.isp24.fcp_hdr.ox_id); + + cmd->dif_err_code = DIF_ERR_GRD; + scsi_status = SAM_STAT_CHECK_CONDITION; + sense_key = ABORTED_COMMAND; + asc = 0x10; + ascq = 0x1; + } +out: + switch (cmd->state) { + case QLA_TGT_STATE_NEED_DATA: + /* handle_data will load DIF error code */ + cmd->state = QLA_TGT_STATE_DATA_IN; + vha->hw->tgt.tgt_ops->handle_data(cmd); + break; + default: + spin_lock_irqsave(&cmd->cmd_lock, flags); + if (cmd->aborted) { + spin_unlock_irqrestore(&cmd->cmd_lock, flags); + vha->hw->tgt.tgt_ops->free_cmd(cmd); + break; + } + spin_unlock_irqrestore(&cmd->cmd_lock, flags); + + qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc, + ascq); + /* assume scsi status gets out on the wire. + * Will not wait for completion. + */ + vha->hw->tgt.tgt_ops->free_cmd(cmd); + break; + } +} + +/* 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(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 (ha_locked) { + rc = __qlt_send_term_imm_notif(vha, imm); + +#if 0 /* Todo */ + if (rc == -ENOMEM) + qlt_alloc_qfull_cmd(vha, imm, 0, 0); +#else + if (rc) { + } +#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 qla_qpair *qpair, + struct qla_tgt_cmd *cmd, + struct atio_from_isp *atio) +{ + struct scsi_qla_host *vha = qpair->vha; + 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, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha); + + if (cmd) + vha = cmd->vha; + + pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, 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; + } + + qpair->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; + temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 | + CTIO7_FLAGS_TERMINATE; + ctio24->u.status1.flags = cpu_to_le16(temp); + temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); + ctio24->u.status1.ox_id = cpu_to_le16(temp); + + /* Memory Barrier */ + wmb(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->req); + return ret; +} + +static void qlt_send_term_exchange(struct qla_qpair *qpair, + struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked, + int ul_abort) +{ + struct scsi_qla_host *vha; + unsigned long flags = 0; + int rc; + + /* why use different vha? NPIV */ + if (cmd) + vha = cmd->vha; + else + vha = qpair->vha; + + if (ha_locked) { + rc = __qlt_send_term_exchange(qpair, cmd, atio); + if (rc == -ENOMEM) + qlt_alloc_qfull_cmd(vha, atio, 0, 0); + goto done; + } + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + rc = __qlt_send_term_exchange(qpair, 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(qpair->qp_lock_ptr, 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, 0xf016, + "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->trc_flags |= TRC_ABORT; + spin_unlock_irqrestore(&cmd->cmd_lock, flags); + + qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1); + return 0; +} +EXPORT_SYMBOL(qlt_abort_cmd); + +void qlt_free_cmd(struct qla_tgt_cmd *cmd) +{ + struct fc_port *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->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(); + target_free_tag(sess->se_sess, &cmd->se_cmd); +} +EXPORT_SYMBOL(qlt_free_cmd); + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio, + struct qla_tgt_cmd *cmd, uint32_t status) +{ + int term = 0; + struct scsi_qla_host *vha = qpair->vha; + + if (cmd->se_cmd.prot_op) + ql_dbg(ql_dbg_tgt_dif, vha, 0xe013, + "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] " + "se_cmd=%p tag[%x] op %#x/%s", + cmd->lba, cmd->lba, + cmd->num_blks, &cmd->se_cmd, + cmd->atio.u.isp24.exchange_addr, + cmd->se_cmd.prot_op, + prot_op_str(cmd->se_cmd.prot_op)); + + 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(qpair, cmd, &cmd->atio, 1, 0); + + return term; +} + + +/* ha->hardware_lock supposed to be held on entry */ +static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, + struct rsp_que *rsp, uint32_t handle, void *ctio) +{ + struct qla_tgt_cmd *cmd = NULL; + struct req_que *req; + int qid = GET_QID(handle); + uint32_t h = handle & ~QLA_TGT_HANDLE_MASK; + + if (unlikely(h == QLA_TGT_SKIP_HANDLE)) + return NULL; + + if (qid == rsp->req->id) { + req = rsp->req; + } else if (vha->hw->req_q_map[qid]) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a, + "qla_target(%d): CTIO completion with different QID %d handle %x\n", + vha->vp_idx, rsp->id, handle); + req = vha->hw->req_q_map[qid]; + } else { + return NULL; + } + + h &= QLA_CMD_HANDLE_MASK; + + if (h != QLA_TGT_NULL_HANDLE) { + if (unlikely(h >= req->num_outstanding_cmds)) { + ql_dbg(ql_dbg_tgt, vha, 0xe052, + "qla_target(%d): Wrong handle %x received\n", + vha->vp_idx, handle); + return NULL; + } + + cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h]; + if (unlikely(cmd == NULL)) { + ql_dbg(ql_dbg_async, vha, 0xe053, + "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n", + vha->vp_idx, handle, req->id, rsp->id); + return NULL; + } + req->outstanding_cmds[h] = 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. */ +void +qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) +{ + struct qla_hw_data *ha = vha->hw; + + if (cmd->sg_mapped) + qlt_unmap_sg(vha, cmd); + + /* TODO: fix debug message type and ids. */ + if (cmd->state == QLA_TGT_STATE_PROCESSED) { + ql_dbg(ql_dbg_io, vha, 0xff00, + "HOST-ABORT: state=PROCESSED.\n"); + } 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: state=DATA_IN.\n"); + + ha->tgt.tgt_ops->handle_data(cmd); + return; + } else { + ql_dbg(ql_dbg_io, vha, 0xff03, + "HOST-ABORT: state=BAD(%d).\n", + cmd->state); + dump_stack(); + } + + cmd->trc_flags |= TRC_FLUSH; + ha->tgt.tgt_ops->free_cmd(cmd); +} + +/* + * 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, + struct rsp_que *rsp, 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; + struct qla_qpair *qpair = rsp->qpair; + + 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, rsp, 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; + ql_dbg(ql_dbg_disc, vha, 0x20f8, + "%s %d %8phC post del sess\n", + __func__, __LINE__, cmd->sess->port_name); + + qlt_schedule_sess_for_deletion(cmd->sess); + } + break; + } + 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, ulp_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])); + + qlt_handle_dif_error(qpair, cmd, ctio); + return; + } + 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->trc_flags |= TRC_CTIO_ERR; + if (qlt_term_ctio_exchange(qpair, ctio, cmd, status)) + return; + } + } + + if (cmd->state == QLA_TGT_STATE_PROCESSED) { + cmd->trc_flags |= TRC_CTIO_DONE; + } 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->trc_flags |= TRC_CTIO_ABORTED; + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, + "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); + } else { + cmd->trc_flags |= TRC_CTIO_STRANGE; + 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 fc_port *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 fc_port *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; + struct qla_qpair *qpair = cmd->qpair; + + cmd->cmd_in_wq = 0; + cmd->trc_flags |= TRC_DO_WORK; + + 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; + + 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 = get_datalen_for_atio(atio); + + 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*( + */ + ha->tgt.tgt_ops->put_sess(sess); + 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->trc_flags |= TRC_DO_WORK_ERR; + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0); + + qlt_decr_num_pend_cmds(vha); + target_free_tag(sess->se_sess, &cmd->se_cmd); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + + ha->tgt.tgt_ops->put_sess(sess); +} + +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); +} + +void qlt_clr_qp_table(struct scsi_qla_host *vha) +{ + unsigned long flags; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + void *node; + u64 key = 0; + + ql_log(ql_log_info, vha, 0x706c, + "User update Number of Active Qpairs %d\n", + ha->tgt.num_act_qpairs); + + spin_lock_irqsave(&ha->tgt.atio_lock, flags); + + btree_for_each_safe64(&tgt->lun_qpair_map, key, node) + btree_remove64(&tgt->lun_qpair_map, key); + + ha->base_qpair->lun_cnt = 0; + for (key = 0; key < ha->max_qpairs; key++) + if (ha->queue_pair_map[key]) + ha->queue_pair_map[key]->lun_cnt = 0; + + spin_unlock_irqrestore(&ha->tgt.atio_lock, flags); +} + +static void qlt_assign_qpair(struct scsi_qla_host *vha, + struct qla_tgt_cmd *cmd) +{ + struct qla_qpair *qpair, *qp; + struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; + struct qla_qpair_hint *h; + + if (vha->flags.qpairs_available) { + h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun); + if (unlikely(!h)) { + /* spread lun to qpair ratio evently */ + int lcnt = 0, rc; + struct scsi_qla_host *base_vha = + pci_get_drvdata(vha->hw->pdev); + + qpair = vha->hw->base_qpair; + if (qpair->lun_cnt == 0) { + qpair->lun_cnt++; + h = qla_qpair_to_hint(tgt, qpair); + BUG_ON(!h); + rc = btree_insert64(&tgt->lun_qpair_map, + cmd->unpacked_lun, h, GFP_ATOMIC); + if (rc) { + qpair->lun_cnt--; + ql_log(ql_log_info, vha, 0xd037, + "Unable to insert lun %llx into lun_qpair_map\n", + cmd->unpacked_lun); + } + goto out; + } else { + lcnt = qpair->lun_cnt; + } + + h = NULL; + list_for_each_entry(qp, &base_vha->qp_list, + qp_list_elem) { + if (qp->lun_cnt == 0) { + qp->lun_cnt++; + h = qla_qpair_to_hint(tgt, qp); + BUG_ON(!h); + rc = btree_insert64(&tgt->lun_qpair_map, + cmd->unpacked_lun, h, GFP_ATOMIC); + if (rc) { + qp->lun_cnt--; + ql_log(ql_log_info, vha, 0xd038, + "Unable to insert lun %llx into lun_qpair_map\n", + cmd->unpacked_lun); + } + qpair = qp; + goto out; + } else { + if (qp->lun_cnt < lcnt) { + lcnt = qp->lun_cnt; + qpair = qp; + continue; + } + } + } + BUG_ON(!qpair); + qpair->lun_cnt++; + h = qla_qpair_to_hint(tgt, qpair); + BUG_ON(!h); + rc = btree_insert64(&tgt->lun_qpair_map, + cmd->unpacked_lun, h, GFP_ATOMIC); + if (rc) { + qpair->lun_cnt--; + ql_log(ql_log_info, vha, 0xd039, + "Unable to insert lun %llx into lun_qpair_map\n", + cmd->unpacked_lun); + } + } + } else { + h = &tgt->qphints[0]; + } +out: + cmd->qpair = h->qpair; + cmd->se_cmd.cpuid = h->cpuid; +} + +static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, + struct fc_port *sess, + struct atio_from_isp *atio) +{ + struct se_session *se_sess = sess->se_sess; + struct qla_tgt_cmd *cmd; + int tag, cpu; + + tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); + if (tag < 0) + return NULL; + + cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; + memset(cmd, 0, sizeof(struct qla_tgt_cmd)); + cmd->cmd_type = TYPE_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->se_cmd.map_cpu = cpu; + cmd->sess = sess; + cmd->loop_id = sess->loop_id; + cmd->conf_compl_supported = sess->conf_compl_supported; + + cmd->trc_flags = 0; + cmd->jiffies_at_alloc = get_jiffies_64(); + + cmd->unpacked_lun = scsilun_to_int( + (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); + qlt_assign_qpair(vha, cmd); + cmd->reset_count = vha->hw->base_qpair->chip_reset; + cmd->vp_idx = vha->vp_idx; + + return cmd; +} + +/* 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 fc_port *sess; + struct qla_tgt_cmd *cmd; + unsigned long flags; + port_id_t id; + + if (unlikely(tgt->tgt_stop)) { + ql_dbg(ql_dbg_io, vha, 0x3061, + "New command while device %p is shutting down\n", tgt); + return -ENODEV; + } + + id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2]; + id.b.area = atio->u.isp24.fcp_hdr.s_id[1]; + id.b.domain = atio->u.isp24.fcp_hdr.s_id[0]; + if (IS_SW_RESV_ADDR(id)) + return -EBUSY; + + sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); + if (unlikely(!sess)) + return -EFAULT; + + /* 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) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002, + "New command while old session %p is being deleted\n", + sess); + return -EFAULT; + } + + /* + * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. + */ + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, + "%s: kref_get fail, %8phC oxid %x \n", + __func__, sess->port_name, + be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); + return -EFAULT; + } + + 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); + ha->tgt.tgt_ops->put_sess(sess); + return -EBUSY; + } + + cmd->cmd_in_wq = 1; + cmd->trc_flags |= TRC_NEW_CMD; + + spin_lock_irqsave(&vha->cmd_list_lock, flags); + list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); + spin_unlock_irqrestore(&vha->cmd_list_lock, flags); + + INIT_WORK(&cmd->work, qlt_do_work); + if (vha->flags.qpairs_available) { + queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work); + } else 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 fc_port *sess, u64 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; + struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0]; + + 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 = ha->base_qpair->chip_reset; + mcmd->qpair = h->qpair; + mcmd->vha = vha; + mcmd->se_cmd.cpuid = h->cpuid; + mcmd->unpacked_lun = lun; + + switch (fn) { + case QLA_TGT_LUN_RESET: + case QLA_TGT_CLEAR_TS: + case QLA_TGT_ABORT_TS: + abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); + /* drop through */ + case QLA_TGT_CLEAR_ACA: + h = qlt_find_qphint(vha, mcmd->unpacked_lun); + mcmd->qpair = h->qpair; + mcmd->se_cmd.cpuid = h->cpuid; + break; + + case QLA_TGT_TARGET_RESET: + case QLA_TGT_NEXUS_LOSS_SESS: + case QLA_TGT_NEXUS_LOSS: + case QLA_TGT_ABORT_ALL: + default: + /* no-op */ + break; + } + + INIT_WORK(&mcmd->work, qlt_do_tmr_work); + queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, + &mcmd->work); + + 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 fc_port *sess; + u64 unpacked_lun; + int fn; + unsigned long flags; + + 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 *)&a->u.isp24.fcp_cmnd.lun); + + if (sess == NULL || sess->deleted) + 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 fc_port *sess) +{ + struct atio_from_isp *a = (struct atio_from_isp *)iocb; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_mgmt_cmd *mcmd; + u64 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)); + + unpacked_lun = + scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun); + mcmd->reset_count = ha->base_qpair->chip_reset; + mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK; + mcmd->qpair = ha->base_qpair; + + rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func, + 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 fc_port *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 (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->se_sess, + fcport, + fcport->port_name, fcport->loop_id, + fcport->d_id.b.domain, fcport->d_id.b.area, + fcport->d_id.b.al_pa, rc); + } + + fcport->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. +*/ +struct fc_port * +qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn, + port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess) +{ + struct fc_port *sess = NULL, *other_sess; + uint64_t other_wwn; + + *conflict_sess = NULL; + + list_for_each_entry(other_sess, &vha->vp_fcports, list) { + + 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->d_id.b24) { + if (loop_id != other_sess->loop_id) { + ql_dbg(ql_dbg_tgt_tmr, 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); + } else { + /* + * Another wwn used to have our s_id/loop_id + * kill the session, but don't free the loop_id + */ + ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b, + "Invalidating sess %p loop_id %d wwn %llx.\n", + other_sess, other_sess->loop_id, other_wwn); + + other_sess->keep_nport_handle = 1; + if (other_sess->disc_state != DSC_DELETED) + *conflict_sess = other_sess; + qlt_schedule_sess_for_deletion(other_sess); + } + continue; + } + + /* find other sess with nport handle collision */ + if ((loop_id == other_sess->loop_id) && + (loop_id != FC_NO_LOOP_ID)) { + ql_dbg(ql_dbg_tgt_tmr, 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); + } + } + + 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; + unsigned long flags; + + key = (((u32)s_id->b.domain << 16) | + ((u32)s_id->b.area << 8) | + ((u32)s_id->b.al_pa)); + + spin_lock_irqsave(&vha->cmd_list_lock, flags); + 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(op, &vha->unknown_atio_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_irqrestore(&vha->cmd_list_lock, flags); + + return count; +} + +static int qlt_handle_login(struct scsi_qla_host *vha, + struct imm_ntfy_from_isp *iocb) +{ + struct fc_port *sess = NULL, *conflict_sess = NULL; + uint64_t wwn; + port_id_t port_id; + uint16_t loop_id, wd3_lo; + int res = 0; + struct 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); + + /* Mark all stale commands sitting in qla_tgt_wq for deletion */ + abort_cmds_for_s_id(vha, &port_id); + + if (wwn) { + spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); + sess = qlt_find_sess_invalidate_other(vha, wwn, + port_id, loop_id, &conflict_sess); + spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); + } else { + ql_dbg(ql_dbg_disc, vha, 0xffff, + "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ", + __func__, __LINE__, loop_id, port_id.b24); + qlt_send_term_imm_notif(vha, iocb, 1); + goto out; + } + + if (IS_SW_RESV_ADDR(port_id)) { + res = 1; + goto out; + } + + pla = qlt_plogi_ack_find_add(vha, &port_id, iocb); + if (!pla) { + ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff, + "%s %d %8phC Term INOT due to mem alloc fail", + __func__, __LINE__, + iocb->u.isp24.port_name); + qlt_send_term_imm_notif(vha, iocb, 1); + goto out; + } + + if (conflict_sess) { + conflict_sess->login_gen++; + qlt_plogi_ack_link(vha, pla, conflict_sess, + QLT_PLOGI_LINK_CONFLICT); + } + + if (!sess) { + pla->ref_count++; + ql_dbg(ql_dbg_disc, vha, 0xffff, + "%s %d %8phC post new sess\n", + __func__, __LINE__, iocb->u.isp24.port_name); + if (iocb->u.isp24.status_subcode == ELS_PLOGI) + qla24xx_post_newsess_work(vha, &port_id, + iocb->u.isp24.port_name, + iocb->u.isp24.u.plogi.node_name, + pla, FC4_TYPE_UNKNOWN); + else + qla24xx_post_newsess_work(vha, &port_id, + iocb->u.isp24.port_name, NULL, + pla, FC4_TYPE_UNKNOWN); + + goto out; + } + + if (sess->disc_state == DSC_UPD_FCPORT) { + u16 sec; + + /* + * Remote port registration is still going on from + * previous login. Allow it to finish before we + * accept the new login. + */ + sess->next_disc_state = DSC_DELETE_PEND; + sec = jiffies_to_msecs(jiffies - + sess->jiffies_at_registration) / 1000; + if (sess->sec_since_registration < sec && sec && + !(sec % 5)) { + sess->sec_since_registration = sec; + ql_dbg(ql_dbg_disc, vha, 0xffff, + "%s %8phC - Slow Rport registration (%d Sec)\n", + __func__, sess->port_name, sec); + } + + if (!conflict_sess) + kmem_cache_free(qla_tgt_plogi_cachep, pla); + + qlt_send_term_imm_notif(vha, iocb, 1); + goto out; + } + + qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN); + sess->d_id = port_id; + sess->login_gen++; + + if (iocb->u.isp24.status_subcode == ELS_PRLI) { + sess->fw_login_state = DSC_LS_PRLI_PEND; + sess->local = 0; + sess->loop_id = loop_id; + sess->d_id = port_id; + sess->fw_login_state = DSC_LS_PRLI_PEND; + wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); + + if (wd3_lo & BIT_7) + sess->conf_compl_supported = 1; + + if ((wd3_lo & BIT_4) == 0) + sess->port_type = FCT_INITIATOR; + else + sess->port_type = FCT_TARGET; + + } else + sess->fw_login_state = DSC_LS_PLOGI_PEND; + + + ql_dbg(ql_dbg_disc, vha, 0x20f9, + "%s %d %8phC DS %d\n", + __func__, __LINE__, sess->port_name, sess->disc_state); + + switch (sess->disc_state) { + case DSC_DELETED: + case DSC_LOGIN_PEND: + qlt_plogi_ack_unref(vha, pla); + break; + + default: + /* + * 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->d_id.b24 == port_id.b24)); + + ql_dbg(ql_dbg_disc, vha, 0x20f9, + "%s %d %8phC post del sess\n", + __func__, __LINE__, sess->port_name); + + + qlt_schedule_sess_for_deletion(sess); + break; + } +out: + return res; +} + +/* + * 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 fc_port *sess = NULL, *conflict_sess = NULL; + uint64_t wwn; + port_id_t port_id; + uint16_t loop_id; + uint16_t wd3_lo; + int res = 0; + 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_disc, vha, 0xf026, + "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n", + vha->vp_idx, iocb->u.isp24.port_id[2], + iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0], + iocb->u.isp24.status_subcode, loop_id, + iocb->u.isp24.port_name); + + /* res = 1 means ack at the end of thread + * res = 0 means ack async/later. + */ + switch (iocb->u.isp24.status_subcode) { + case ELS_PLOGI: + res = qlt_handle_login(vha, iocb); + break; + + case ELS_PRLI: + if (N2N_TOPO(ha)) { + sess = qla2x00_find_fcport_by_wwpn(vha, + iocb->u.isp24.port_name, 1); + + if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) { + ql_dbg(ql_dbg_disc, vha, 0xffff, + "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n", + __func__, __LINE__, + iocb->u.isp24.port_name); + qlt_send_term_imm_notif(vha, iocb, 1); + break; + } + + res = qlt_handle_login(vha, iocb); + break; + } + + if (IS_SW_RESV_ADDR(port_id)) { + res = 1; + break; + } + + 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(vha, wwn, port_id, + loop_id, &conflict_sess); + spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); + } + + if (conflict_sess) { + switch (conflict_sess->disc_state) { + case DSC_DELETED: + case DSC_DELETE_PEND: + break; + default: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b, + "PRLI with conflicting sess %p port %8phC\n", + conflict_sess, conflict_sess->port_name); + conflict_sess->fw_login_state = + DSC_LS_PORT_UNAVAIL; + qlt_send_term_imm_notif(vha, iocb, 1); + res = 0; + break; + } + } + + if (sess != NULL) { + bool delete = false; + int sec; + spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags); + switch (sess->fw_login_state) { + case DSC_LS_PLOGI_PEND: + case DSC_LS_PLOGI_COMP: + case DSC_LS_PRLI_COMP: + break; + default: + delete = true; + break; + } + + switch (sess->disc_state) { + case DSC_UPD_FCPORT: + spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, + flags); + + sec = jiffies_to_msecs(jiffies - + sess->jiffies_at_registration)/1000; + if (sess->sec_since_registration < sec && sec && + !(sec % 5)) { + sess->sec_since_registration = sec; + ql_dbg(ql_dbg_disc, sess->vha, 0xffff, + "%s %8phC : Slow Rport registration(%d Sec)\n", + __func__, sess->port_name, sec); + } + qlt_send_term_imm_notif(vha, iocb, 1); + return 0; + + case DSC_LOGIN_PEND: + case DSC_GPDB: + case DSC_LOGIN_COMPLETE: + case DSC_ADISC: + delete = false; + break; + default: + break; + } + + if (delete) { + spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, + flags); + /* + * 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->d_id = port_id; + sess->fw_login_state = DSC_LS_PRLI_PEND; + + if (wd3_lo & BIT_7) + sess->conf_compl_supported = 1; + + if ((wd3_lo & BIT_4) == 0) + sess->port_type = FCT_INITIATOR; + else + sess->port_type = FCT_TARGET; + + spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags); + } + res = 1; /* send notify ack */ + + /* Make session global (not used in fabric mode) */ + if (ha->current_topology != ISP_CFG_F) { + if (sess) { + ql_dbg(ql_dbg_disc, vha, 0x20fa, + "%s %d %8phC post nack\n", + __func__, __LINE__, sess->port_name); + qla24xx_post_nack_work(vha, sess, iocb, + SRB_NACK_PRLI); + res = 0; + } else { + set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); + set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); + qla2xxx_wake_dpc(vha); + } + } else { + if (sess) { + ql_dbg(ql_dbg_disc, vha, 0x20fb, + "%s %d %8phC post nack\n", + __func__, __LINE__, sess->port_name); + qla24xx_post_nack_work(vha, sess, iocb, + SRB_NACK_PRLI); + res = 0; + } + } + break; + + case ELS_TPRLO: + if (le16_to_cpu(iocb->u.isp24.flags) & + NOTIFY24XX_FLAGS_GLOBAL_TPRLO) { + loop_id = 0xFFFF; + qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS); + res = 1; + break; + } + /* fall through */ + case ELS_LOGO: + case ELS_PRLO: + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + sess = qla2x00_find_fcport_by_loopid(vha, loop_id); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + if (sess) { + sess->login_gen++; + sess->fw_login_state = DSC_LS_LOGO_PEND; + sess->logo_ack_needed = 1; + memcpy(sess->iocb, iocb, IOCB_SIZE); + } + + res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); + + ql_dbg(ql_dbg_disc, vha, 0x20fc, + "%s: logo %llx res %d sess %p ", + __func__, wwn, res, sess); + if (res == 0) { + /* + * cmd went upper layer, look for qlt_xmit_tm_rsp() + * for LOGO_ACK & sess delete + */ + BUG_ON(!sess); + res = 0; + } else { + /* cmd did not go to upper layer. */ + if (sess) { + qlt_schedule_sess_for_deletion(sess); + res = 0; + } + /* else logo will be ack */ + } + 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(ha->base_qpair, + &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0); + tgt->link_reinit_iocb_pending = 0; + } + + sess = qla2x00_find_fcport_by_wwpn(vha, + iocb->u.isp24.port_name, 1); + if (sess) { + ql_dbg(ql_dbg_disc, vha, 0x20fd, + "sess %p lid %d|%d DS %d LS %d\n", + sess, sess->loop_id, loop_id, + sess->disc_state, sess->fw_login_state); + } + + 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; + } + + ql_dbg(ql_dbg_disc, vha, 0xf026, + "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n", + vha->vp_idx, iocb->u.isp24.status_subcode, res); + + return res; +} + +/* + * 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(ha->base_qpair, + &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); + break; + + case IMM_NTFY_ELS: + if (qlt_24xx_handle_els(vha, iocb) == 0) + 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(ha->base_qpair, 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 qla_qpair *qpair, + struct atio_from_isp *atio, uint16_t status) +{ + struct scsi_qla_host *vha = qpair->vha; + struct ctio7_to_24xx *ctio24; + struct qla_hw_data *ha = vha->hw; + request_t *pkt; + struct fc_port *sess = NULL; + unsigned long flags; + u16 temp; + port_id_t id; + + id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2]; + id.b.area = atio->u.isp24.fcp_hdr.s_id[1]; + id.b.domain = atio->u.isp24.fcp_hdr.s_id[0]; + id.b.rsvd_1 = 0; + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + sess = qla2x00_find_fcport_by_nportid(vha, &id, 1); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + if (!sess) { + qlt_send_term_exchange(qpair, NULL, atio, 1, 0); + return 0; + } + /* Sending marker isn't necessary, since we called from ISR */ + + pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, 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; + } + + qpair->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; + temp = (atio->u.isp24.attr << 9) | + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | + CTIO7_FLAGS_DONT_RET_CTIO; + ctio24->u.status1.flags = cpu_to_le16(temp); + /* + * 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); + + ctio24->u.status1.residual = get_datalen_for_atio(atio); + + if (ctio24->u.status1.residual != 0) + ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; + + /* Memory Barrier */ + wmb(); + if (qpair->reqq_start_iocbs) + qpair->reqq_start_iocbs(qpair); + else + qla2x00_start_iocbs(vha, qpair->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 fc_port *sess; + struct se_session *se_sess; + struct qla_tgt_cmd *cmd; + int tag, cpu; + unsigned long flags; + + 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 = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); + if (tag < 0) { + 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; + } + + cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; + 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 = ha->base_qpair->chip_reset; + cmd->q_full = 1; + cmd->qpair = ha->base_qpair; + cmd->se_cmd.map_cpu = cpu; + + if (qfull) { + cmd->q_full = 1; + /* NOTE: borrowing the state field to carry the status */ + cmd->state = status; + } else + cmd->term_exchg = 1; + + spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); + 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; + spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); +} + +int +qlt_free_qfull_cmds(struct qla_qpair *qpair) +{ + struct scsi_qla_host *vha = qpair->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + struct qla_tgt_cmd *cmd, *tcmd; + struct list_head free_list, q_full_list; + int rc = 0; + + if (list_empty(&ha->tgt.q_full_list)) + return 0; + + INIT_LIST_HEAD(&free_list); + INIT_LIST_HEAD(&q_full_list); + + spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); + if (list_empty(&ha->tgt.q_full_list)) { + spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); + return 0; + } + + list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list); + spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); + + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) { + if (cmd->q_full) + /* cmd->state is a borrowed field to hold status */ + rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state); + else if (cmd->term_exchg) + rc = __qlt_send_term_exchange(qpair, 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(qpair->qp_lock_ptr, 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); + } + + if (!list_empty(&q_full_list)) { + spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); + list_splice(&q_full_list, &vha->hw->tgt.q_full_list); + spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); + } + + return rc; +} + +static void +qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio, + uint16_t status) +{ + int rc = 0; + struct scsi_qla_host *vha = qpair->vha; + + rc = __qlt_send_busy(qpair, 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 qla_qpair *qpair, + struct atio_from_isp *atio, uint8_t ha_locked) +{ + struct qla_hw_data *ha = vha->hw; + 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); + qlt_send_busy(qpair, atio, qla_sam_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 = 0; + + if (unlikely(tgt == NULL)) { + ql_dbg(ql_dbg_tgt, 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(ha->base_qpair, atio, qla_sam_status); + 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, ha->base_qpair, + 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 (!ha_locked) + spin_lock_irqsave(&ha->hardware_lock, flags); + switch (rc) { + case -ENODEV: + ql_dbg(ql_dbg_tgt, vha, 0xe05f, + "qla_target: Unable to send command to target\n"); + break; + case -EBADF: + 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(ha->base_qpair, NULL, + atio, 1, 0); + break; + case -EBUSY: + 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(ha->base_qpair, atio, + tc_sam_status); + break; + default: + 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(ha->base_qpair, atio, + qla_sam_status); + break; + } + 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, + struct rsp_que *rsp, response_t *pkt) +{ + 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, vha->hw); + return; + } + + /* + * In tgt_stop mode we also should allow all requests to pass. + * Otherwise, some commands can stuck. + */ + + 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, rsp, 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, rsp->qpair, atio, 1); + if (rc != 0) + return; + + rc = qlt_handle_cmd_for_atio(vha, atio); + if (unlikely(rc != 0)) { + switch (rc) { + case -ENODEV: + ql_dbg(ql_dbg_tgt, vha, 0xe05f, + "qla_target: Unable to send command to target\n"); + break; + case -EBADF: + 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(rsp->qpair, NULL, + atio, 1, 0); + break; + case -EBUSY: + 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(rsp->qpair, atio, + tc_sam_status); + break; + default: + 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(rsp->qpair, atio, + qla_sam_status); + break; + } + } + } + break; + + case CONTINUE_TGT_IO_TYPE: + { + struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; + qlt_do_ctio_completion(vha, rsp, 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, rsp, 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; + } + +} + +/* + * 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 (!tgt || tgt->tgt_stop || tgt->tgt_stopped) + 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. + */ + + + 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(ha->base_qpair, + (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_REJECTED_FCP_CMD: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017, + "qla_target(%d): Async event LS_REJECT 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 (le16_to_cpu(mailbox[3]) == 1) { + /* exchange starvation. */ + vha->hw->exch_starvation++; + if (vha->hw->exch_starvation > 5) { + ql_log(ql_log_warn, vha, 0xd03a, + "Exchange starvation-. Resetting RISC\n"); + + vha->hw->exch_starvation = 0; + 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); + } + } + 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"); + vha->hw->exch_starvation = 0; + } else if (login_code == 0x7) + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, + "Async MB 2: Port Logged Out\n"); + break; + default: + break; + } + +} + +static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, + uint16_t loop_id) +{ + fc_port_t *fcport, *tfcp, *del; + int rc; + unsigned long flags; + u8 newfcport = 0; + + 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 = qla24xx_gpdb_wait(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; + } + + del = NULL; + spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags); + tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1); + + if (tfcp) { + tfcp->d_id = fcport->d_id; + tfcp->port_type = fcport->port_type; + tfcp->supported_classes = fcport->supported_classes; + tfcp->flags |= fcport->flags; + tfcp->scan_state = QLA_FCPORT_FOUND; + + del = fcport; + fcport = tfcp; + } else { + if (vha->hw->current_topology == ISP_CFG_F) + fcport->flags |= FCF_FABRIC_DEVICE; + + list_add_tail(&fcport->list, &vha->vp_fcports); + if (!IS_SW_RESV_ADDR(fcport->d_id)) + vha->fcport_count++; + fcport->login_gen++; + fcport->disc_state = DSC_LOGIN_COMPLETE; + fcport->login_succ = 1; + newfcport = 1; + } + + fcport->deleted = 0; + spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags); + + switch (vha->host->active_mode) { + case MODE_INITIATOR: + case MODE_DUAL: + if (newfcport) { + if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) { + qla24xx_sched_upd_fcport(fcport); + } else { + ql_dbg(ql_dbg_disc, vha, 0x20ff, + "%s %d %8phC post gpsc fcp_cnt %d\n", + __func__, __LINE__, fcport->port_name, vha->fcport_count); + qla24xx_post_gpsc_work(vha, fcport); + } + } + break; + + case MODE_TARGET: + default: + break; + } + if (del) + qla2x00_free_fcport(del); + + return fcport; +} + +/* Must be called under tgt_mutex */ +static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha, + uint8_t *s_id) +{ + struct fc_port *sess = NULL; + fc_port_t *fcport = NULL; + int rc, global_resets; + uint16_t loop_id = 0; + + 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]); + return NULL; + } + + 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); + + 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); + + 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 fc_port *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) { + sess = NULL; + goto out_term2; + } + + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c, + "%s: kref_get fail %8phC \n", + __func__, sess->port_name); + sess = NULL; + goto out_term2; + } + } + + rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); + + ha->tgt.tgt_ops->put_sess(sess); + + if (rc != 0) + goto out_term; + return; + +out_term2: + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2); + + if (sess) + ha->tgt.tgt_ops->put_sess(sess); + +out_term: + spin_lock_irqsave(&ha->hardware_lock, flags); + qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts, + FCP_TMF_REJECTED, false); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + +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 fc_port *sess = NULL; + unsigned long flags; + uint8_t *s_id = NULL; /* to hide compiler warnings */ + int rc; + u64 unpacked_lun; + int fn; + void *iocb; + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + + if (tgt->tgt_stop) + goto out_term2; + + 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_term2; + } else { + if (sess->deleted) { + sess = NULL; + goto out_term2; + } + + if (!kref_get_unless_zero(&sess->sess_kref)) { + ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020, + "%s: kref_get fail %8phC\n", + __func__, sess->port_name); + sess = NULL; + goto out_term2; + } + } + + iocb = a; + fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; + unpacked_lun = + scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun); + + rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + ha->tgt.tgt_ops->put_sess(sess); + + if (rc != 0) + goto out_term; + return; + +out_term2: + if (sess) + ha->tgt.tgt_ops->put_sess(sess); + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); +out_term: + qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0); +} + +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; + int rc, i; + struct qla_qpair_hint *h; + + 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; + } + + tgt->qphints = kcalloc(ha->max_qpairs + 1, + sizeof(struct qla_qpair_hint), + GFP_KERNEL); + if (!tgt->qphints) { + kfree(tgt); + ql_log(ql_log_warn, base_vha, 0x0197, + "Unable to allocate qpair hints.\n"); + return -ENOMEM; + } + + if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) + base_vha->host->hostt->supported_mode |= MODE_TARGET; + + rc = btree_init64(&tgt->lun_qpair_map); + if (rc) { + kfree(tgt->qphints); + kfree(tgt); + ql_log(ql_log_info, base_vha, 0x0198, + "Unable to initialize lun_qpair_map btree\n"); + return -EIO; + } + h = &tgt->qphints[0]; + h->qpair = ha->base_qpair; + INIT_LIST_HEAD(&h->hint_elem); + h->cpuid = ha->base_qpair->cpuid; + list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list); + + for (i = 0; i < ha->max_qpairs; i++) { + unsigned long flags; + + struct qla_qpair *qpair = ha->queue_pair_map[i]; + h = &tgt->qphints[i + 1]; + INIT_LIST_HEAD(&h->hint_elem); + if (qpair) { + h->qpair = qpair; + spin_lock_irqsave(qpair->qp_lock_ptr, flags); + list_add_tail(&h->hint_elem, &qpair->hints_list); + spin_unlock_irqrestore(qpair->qp_lock_ptr, flags); + h->cpuid = qpair->cpuid; + } + } + + tgt->ha = ha; + tgt->vha = base_vha; + init_waitqueue_head(&tgt->waitQ); + INIT_LIST_HEAD(&tgt->del_sess_list); + spin_lock_init(&tgt->sess_work_lock); + INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); + INIT_LIST_HEAD(&tgt->sess_works_list); + 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); + /* 3 is reserved */ + tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); + + mutex_lock(&qla_tgt_mutex); + list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); + mutex_unlock(&qla_tgt_mutex); + + if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target) + ha->tgt.tgt_ops->add_target(base_vha); + + 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); + + 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; +} + +void qlt_remove_target_resources(struct qla_hw_data *ha) +{ + struct scsi_qla_host *node; + u32 key = 0; + + btree_for_each_safe32(&ha->tgt.host_map, key, node) + btree_remove32(&ha->tgt.host_map, key); + + btree_destroy32(&ha->tgt.host_map); +} + +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 + * + * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data + * @phys_wwpn: + * @npiv_wwpn: + * @npiv_wwnn: + * @callback: lport initialization callback for tcm_qla2xxx code + */ +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) +{ + 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_UNKNOWN; + break; + case QLA2XXX_INI_MODE_DUAL: + vha->host->active_mode = MODE_DUAL; + break; + default: + break; + } +} + +/* Must be called under HW lock */ +static void qlt_clear_mode(struct scsi_qla_host *vha) +{ + 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: + case QLA2XXX_INI_MODE_DUAL: + vha->host->active_mode = MODE_INITIATOR; + break; + default: + break; + } +} + +/* + * 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); + + 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 { + 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) +{ + 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); +} + +u8 +qlt_rff_id(struct scsi_qla_host *vha) +{ + u8 fc4_feature = 0; + /* + * FC-4 Feature bit 0 indicates target functionality to the name server. + */ + if (qla_tgt_mode_enabled(vha)) { + fc4_feature = BIT_0; + } else if (qla_ini_mode_enabled(vha)) { + fc4_feature = BIT_1; + } else if (qla_dual_mode_enabled(vha)) + fc4_feature = BIT_0 | BIT_1; + + return fc4_feature; +} + +/* + * 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_ini_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 (!ha->flags.fw_started) + 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, 0xd03c, + "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(ha->base_qpair, 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); +} + +void +qlt_24xx_config_rings(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_msix_entry *msix = &ha->msix_entries[2]; + struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; + + 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 (ha->flags.msix_enabled) { + if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) { + if (IS_QLA2071(ha)) { + /* 4 ports Baker: Enable Interrupt Handshake */ + icb->msix_atio = 0; + icb->firmware_options_2 |= BIT_26; + } else { + icb->msix_atio = cpu_to_le16(msix->entry); + icb->firmware_options_2 &= ~BIT_26; + } + ql_dbg(ql_dbg_init, vha, 0xf072, + "Registering ICB vector 0x%x for atio que.\n", + msix->entry); + } + } else { + /* INTx|MSI */ + if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) { + icb->msix_atio = 0; + icb->firmware_options_2 |= BIT_26; + ql_dbg(ql_dbg_init, vha, 0xf072, + "%s: Use INTx for ATIOQ.\n", __func__); + } + } +} + +void +qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) +{ + struct qla_hw_data *ha = vha->hw; + u32 tmp; + + if (!QLA_TGT_MODE_ENABLED()) + return; + + if (qla_tgt_mode_enabled(vha) || qla_dual_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; + } + + if (qla_tgt_mode_enabled(vha)) + nv->exchange_count = cpu_to_le16(0xFFFF); + else /* dual */ + nv->exchange_count = cpu_to_le16(ql2xexchoffld); + + /* Enable target mode */ + nv->firmware_options_1 |= cpu_to_le32(BIT_4); + + /* Disable ini mode, if requested */ + if (qla_tgt_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); + + /* + * clear BIT 15 explicitly as we have seen at least + * a couple of instances where this was set and this + * was causing the firmware to not be initialized. + */ + nv->firmware_options_1 &= cpu_to_le32(~BIT_15); + /* Enable target PRLI control */ + nv->firmware_options_2 |= cpu_to_le32(BIT_14); + + if (IS_QLA25XX(ha)) { + /* Change Loop-prefer to Pt-Pt */ + tmp = ~(BIT_4|BIT_5|BIT_6); + nv->firmware_options_2 &= cpu_to_le32(tmp); + tmp = P2P << 4; + nv->firmware_options_2 |= cpu_to_le32(tmp); + } + } 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; + } + + if (ha->base_qpair->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; + u32 tmp; + + if (!QLA_TGT_MODE_ENABLED()) + return; + + if (qla_tgt_mode_enabled(vha) || qla_dual_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; + } + + if (qla_tgt_mode_enabled(vha)) + nv->exchange_count = cpu_to_le16(0xFFFF); + else /* dual */ + nv->exchange_count = cpu_to_le16(ql2xexchoffld); + + /* Enable target mode */ + nv->firmware_options_1 |= cpu_to_le32(BIT_4); + + /* Disable ini mode, if requested */ + if (qla_tgt_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); + /* + * clear BIT 15 explicitly as we have seen at + * least a couple of instances where this was set + * and this was causing the firmware to not be + * initialized. + */ + nv->firmware_options_1 &= cpu_to_le32(~BIT_15); + 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); + + /* Change Loop-prefer to Pt-Pt */ + tmp = ~(BIT_4|BIT_5|BIT_6); + nv->firmware_options_2 &= cpu_to_le32(tmp); + tmp = P2P << 4; + nv->firmware_options_2 |= cpu_to_le32(tmp); + } 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; + } + + if (ha->base_qpair->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 */ +} + + +void +qlt_modify_vp_config(struct scsi_qla_host *vha, + struct vp_config_entry_24xx *vpmod) +{ + /* enable target mode. Bit5 = 1 => disable */ + if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) + vpmod->options_idx1 &= ~BIT_5; + + /* Disable ini mode, if requested. bit4 = 1 => disable */ + if (qla_tgt_mode_enabled(vha)) + vpmod->options_idx1 &= ~BIT_4; +} + +void +qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) +{ + int rc; + + if (!QLA_TGT_MODE_ENABLED()) + return; + + if ((ql2xenablemsix == 0) || 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); + + INIT_LIST_HEAD(&base_vha->unknown_atio_list); + INIT_DELAYED_WORK(&base_vha->unknown_atio_work, + qlt_unknown_atio_work_fn); + + qlt_clear_mode(base_vha); + + rc = btree_init32(&ha->tgt.host_map); + if (rc) + ql_log(ql_log_info, base_vha, 0xd03d, + "Unable to initialize ha->host_map btree\n"); + + qlt_update_vp_map(base_vha, SET_VP_IDX); +} + +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->base_qpair->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, op->rsp, (response_t *)&op->atio); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + kfree(op); +} + +void +qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp, + 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, rsp, pkt); + return; + } + + memcpy(&op->atio, pkt, sizeof(*pkt)); + op->vha = vha; + op->chip_reset = vha->hw->base_qpair->chip_reset; + op->rsp = rsp; + 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 = kcalloc(MAX_MULTI_ID_FABRIC, + sizeof(struct qla_tgt_vp_map), + 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) +{ + void *slot; + u32 key; + int rc; + + if (!QLA_TGT_MODE_ENABLED()) + return; + + key = vha->d_id.b24; + + switch (cmd) { + case SET_VP_IDX: + vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; + break; + case SET_AL_PA: + slot = btree_lookup32(&vha->hw->tgt.host_map, key); + if (!slot) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018, + "Save vha in host_map %p %06x\n", vha, key); + rc = btree_insert32(&vha->hw->tgt.host_map, + key, vha, GFP_ATOMIC); + if (rc) + ql_log(ql_log_info, vha, 0xd03e, + "Unable to insert s_id into host_map: %06x\n", + key); + return; + } + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, + "replace existing vha in host_map %p %06x\n", vha, key); + btree_update32(&vha->hw->tgt.host_map, key, vha); + break; + case RESET_VP_IDX: + vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; + break; + case RESET_AL_PA: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, + "clear vha in host_map %p %06x\n", vha, key); + slot = btree_lookup32(&vha->hw->tgt.host_map, key); + if (slot) + btree_remove32(&vha->hw->tgt.host_map, key); + vha->d_id.b24 = 0; + break; + } +} + +void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id) +{ + + if (!vha->d_id.b24) { + vha->d_id = id; + qlt_update_vp_map(vha, SET_AL_PA); + } else if (vha->d_id.b24 != id.b24) { + qlt_update_vp_map(vha, RESET_AL_PA); + vha->d_id = id; + qlt_update_vp_map(vha, SET_AL_PA); + } +} + +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 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0) + ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL; + 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, 0xd04b, + "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(struct qlt_plogi_ack_t), __alignof__(struct 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); +} |