From: Nicholas Bellinger Date: Thu, 8 Mar 2012 22:27:03 +0000 (-0800) Subject: qla2xxx: Add LLD target-mode infrastructure for >= 24xx series X-Git-Tag: next-20120402~38^2~2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e3de2378ddab6d0b7e3b761839f65bab4fc57de1;p=karo-tx-linux.git qla2xxx: Add LLD target-mode infrastructure for >= 24xx series This patch adds the internal qla_target.[c,h] support pieces for qla2xxx LLD target mode for 24xx series HW. This code was originally based on external qla2x00t module based on 8.02.01-k4, and has been refactored to push the bulk of code into mainline qla2xxx.ko LLD -> qla_target.c. The implementation uses internal workqueues for I/O context submission into tcm_qla2xxx code, and includes the following API for external interaction to allow qla2xxx LDD to function without direct target-core dependencies: struct qla_tgt_func_tmpl { int (*handle_cmd)(struct scsi_qla_host *, struct qla_tgt_cmd *, unsigned char *, uint32_t, int, int, int); int (*handle_data)(struct qla_tgt_cmd *); int (*handle_tmr)(struct qla_tgt_mgmt_cmd *, uint32_t, uint8_t, uint32_t); void (*free_cmd)(struct qla_tgt_cmd *); void (*free_mcmd)(struct qla_tgt_mgmt_cmd *); void (*free_session)(struct qla_tgt_sess *); int (*check_initiator_node_acl)(struct scsi_qla_host *, unsigned char *, void *, uint8_t *, uint16_t); struct qla_tgt_sess *(*find_sess_by_loop_id)(struct scsi_qla_host *, const uint16_t); struct qla_tgt_sess *(*find_sess_by_s_id)(struct scsi_qla_host *, const uint8_t *); void (*clear_nacl_from_fcport_map)(struct qla_tgt_sess *); void (*put_sess)(struct qla_tgt_sess *); }; (nab: Add qla_tgt_func_tmpl->free_mcmd() usage in qla_tgt_xmit_tm_rsp + Fix possible NULL dereference in qla_tgt_handle_srr_work (DanC) + Fix NULL pointer dereference in qla_tgt_abort_task (DanC) + Convert to qlini_mode='enabled' by default in qla_target.c) (joern: Remove loop_id from qla_tgt_make_local_sess() arguments + Remove unused s_id + fix s_id endianness bug + simplify qla_tgt_abort_work) (gerard: fix section __exit mismatch in qla_tgt_exit) Cc: Andrew Vasquez Cc: Arun Easi Cc: Giridhar Malavali Cc: Christoph Hellwig Cc: James Bottomley Cc: Roland Dreier Cc: Joern Engel Cc: Madhuranath Iyengar Signed-off-by: Nicholas A. Bellinger --- diff --git a/drivers/scsi/qla2xxx/Makefile b/drivers/scsi/qla2xxx/Makefile index 5df782f4a097..702931ff67db 100644 --- a/drivers/scsi/qla2xxx/Makefile +++ b/drivers/scsi/qla2xxx/Makefile @@ -1,5 +1,5 @@ qla2xxx-y := qla_os.o qla_init.o qla_mbx.o qla_iocb.o qla_isr.o qla_gs.o \ qla_dbg.o qla_sup.o qla_attr.o qla_mid.o qla_dfs.o qla_bsg.o \ - qla_nx.o + qla_nx.o qla_target.o obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx.o diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c new file mode 100644 index 000000000000..7368fcbc7b83 --- /dev/null +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -0,0 +1,4724 @@ +/* + * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx + * + * based on qla2x00t.c code: + * + * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin + * Copyright (C) 2004 - 2005 Leonid Stoljar + * Copyright (C) 2006 Nathaniel Clark + * Copyright (C) 2006 - 2010 ID7 Ltd. + * + * Forward port and refactoring to modern qla2xxx and target/configfs + * + * Copyright (C) 2010-2011 Nicholas A. Bellinger + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2 + * of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "qla_def.h" +#include "qla_target.h" + +static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; +module_param(qlini_mode, charp, S_IRUGO); +MODULE_PARM_DESC(qlini_mode, + "Determines when initiator mode will be enabled. Possible values: " + "\"exclusive\" - initiator mode will be enabled on load, " + "disabled on enabling target mode and then on disabling target mode " + "enabled back; " + "\"disabled\" - initiator mode will never be enabled; " + "\"enabled\" (default) - initiator mode will always stay enabled."); + +static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; + +/* + * 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. contigent 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_req_pkt() 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 qla_tgt_24xx_atio_pkt(struct scsi_qla_host *ha, atio_from_isp_t *pkt); +static void qla_tgt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); +static int qla_tgt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, + int fn, void *iocb, int flags); +static void qla_tgt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd *cmd, + atio_from_isp_t *atio, int ha_locked); +static void qla_tgt_reject_free_srr_imm(struct scsi_qla_host *ha, struct qla_tgt_srr_imm *imm, + int ha_lock); +/* + * Global Variables + */ +static struct kmem_cache *qla_tgt_cmd_cachep; +static struct kmem_cache *qla_tgt_mgmt_cmd_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); +/* + * From qla2xxx/qla_iobc.c and used by various qla_target.c logic + */ +extern request_t *qla2x00_req_pkt(struct scsi_qla_host *); + +/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ +static struct qla_tgt_sess *qla_tgt_find_sess_by_port_name( + struct qla_tgt *tgt, + const uint8_t *port_name) +{ + struct qla_tgt_sess *sess; + + list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { + if ((sess->port_name[0] == port_name[0]) && + (sess->port_name[1] == port_name[1]) && + (sess->port_name[2] == port_name[2]) && + (sess->port_name[3] == port_name[3]) && + (sess->port_name[4] == port_name[4]) && + (sess->port_name[5] == port_name[5]) && + (sess->port_name[6] == port_name[6]) && + (sess->port_name[7] == port_name[7])) + return sess; + } + + return NULL; +} + +/* Might release hw lock, then reaquire!! */ +static inline int qla_tgt_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) { + printk(KERN_ERR "qla_target(%d): issue_marker() " + "failed\n", vha->vp_idx); + } + return rc; + } + return QLA_SUCCESS; +} + +static inline +struct scsi_qla_host *qla_tgt_find_host_by_d_id(struct scsi_qla_host *vha, uint8_t *d_id) +{ + struct qla_hw_data *ha = vha->hw; + uint8_t vp_idx; + + if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) + return NULL; + + if (vha->d_id.b.al_pa == d_id[2]) + return vha; + + BUG_ON(ha->tgt_vp_map == NULL); + vp_idx = ha->tgt_vp_map[d_id[2]].idx; + if (likely(test_bit(vp_idx, ha->vp_idx_map))) + return ha->tgt_vp_map[vp_idx].vha; + + return NULL; +} + +static inline +struct scsi_qla_host *qla_tgt_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_vp_map == NULL); + if (likely(test_bit(vp_idx, ha->vp_idx_map))) + return ha->tgt_vp_map[vp_idx].vha; + + return NULL; +} + +void qla_tgt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, atio_from_isp_t *atio) +{ + switch (atio->u.raw.entry_type) { + case ATIO_TYPE7: + { + struct scsi_qla_host *host = qla_tgt_find_host_by_d_id(vha, + atio->u.isp24.fcp_hdr.d_id); + if (unlikely(NULL == host)) { + printk(KERN_ERR "qla_target(%d): Received ATIO_TYPE7 " + "with unknown d_id %x:%x:%x\n", vha->vp_idx, + atio->u.isp24.fcp_hdr.d_id[0], + atio->u.isp24.fcp_hdr.d_id[1], + atio->u.isp24.fcp_hdr.d_id[2]); + break; + } + qla_tgt_24xx_atio_pkt(host, atio); + break; + } + + case IMMED_NOTIFY_TYPE: + { + struct scsi_qla_host *host = vha; + imm_ntfy_from_isp_t *entry = (imm_ntfy_from_isp_t *)atio; + + if ((entry->u.isp24.vp_index != 0xFF) && + (entry->u.isp24.nport_handle != 0xFFFF)) { + host = qla_tgt_find_host_by_vp_idx(vha, + entry->u.isp24.vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Received " + "ATIO (IMMED_NOTIFY_TYPE) " + "with unknown vp_index %d\n", + vha->vp_idx, entry->u.isp24.vp_index); + break; + } + } + qla_tgt_24xx_atio_pkt(host, atio); + break; + } + + default: + printk(KERN_ERR "qla_target(%d): Received unknown ATIO atio " + "type %x\n", vha->vp_idx, atio->u.raw.entry_type); + break; + } + + return; +} + +void qla_tgt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) +{ + switch (pkt->entry_type) { + case CTIO_TYPE7: + { + ctio7_from_24xx_t *entry = (ctio7_from_24xx_t *)pkt; + struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha, + entry->vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Response pkt (CTIO_TYPE7) " + "received, with unknown vp_index %d\n", + vha->vp_idx, entry->vp_index); + break; + } + qla_tgt_response_pkt(host, pkt); + break; + } + + case IMMED_NOTIFY_TYPE: + { + struct scsi_qla_host *host = vha; + imm_ntfy_from_isp_t *entry = (imm_ntfy_from_isp_t *)pkt; + + host = qla_tgt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Response pkt " + "(IMMED_NOTIFY_TYPE) received, " + "with unknown vp_index %d\n", + vha->vp_idx, entry->u.isp24.vp_index); + break; + } + qla_tgt_response_pkt(host, pkt); + break; + } + + case NOTIFY_ACK_TYPE: + { + struct scsi_qla_host *host = vha; + nack_to_isp_t *entry = (nack_to_isp_t *)pkt; + + if (0xFF != entry->u.isp24.vp_index) { + host = qla_tgt_find_host_by_vp_idx(vha, + entry->u.isp24.vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Response " + "pkt (NOTIFY_ACK_TYPE) " + "received, with unknown " + "vp_index %d\n", vha->vp_idx, + entry->u.isp24.vp_index); + break; + } + } + qla_tgt_response_pkt(host, pkt); + break; + } + + case ABTS_RECV_24XX: + { + abts_recv_from_24xx_t *entry = (abts_recv_from_24xx_t *)pkt; + struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha, + entry->vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Response pkt " + "(ABTS_RECV_24XX) received, with unknown " + "vp_index %d\n", vha->vp_idx, entry->vp_index); + break; + } + qla_tgt_response_pkt(host, pkt); + break; + } + + case ABTS_RESP_24XX: + { + abts_resp_to_24xx_t *entry = (abts_resp_to_24xx_t *)pkt; + struct scsi_qla_host *host = qla_tgt_find_host_by_vp_idx(vha, + entry->vp_index); + if (unlikely(!host)) { + printk(KERN_ERR "qla_target(%d): Response pkt " + "(ABTS_RECV_24XX) received, with unknown " + "vp_index %d\n", vha->vp_idx, entry->vp_index); + break; + } + qla_tgt_response_pkt(host, pkt); + break; + } + + default: + qla_tgt_response_pkt(vha, pkt); + break; + } + +} + +static void qla_tgt_free_session_done(struct work_struct *work) +{ + struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, + free_work); + struct qla_tgt *tgt = sess->tgt; + struct scsi_qla_host *vha = sess->vha; + struct qla_hw_data *ha = vha->hw; + + BUG_ON(!tgt); + /* + * Release the target session for FC Nexus from fabric module code. + */ + if (sess->se_sess != NULL) + ha->tgt_ops->free_session(sess); + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe104, "Unregistration of" + " sess %p finished\n", sess); + + kfree(sess); + /* + * We need to protect against race, when tgt is freed before or + * inside wake_up() + */ + tgt->sess_count--; + if (tgt->sess_count == 0) + wake_up_all(&tgt->waitQ); +} + +/* ha->hardware_lock supposed to be held on entry */ +void qla_tgt_unreg_sess(struct qla_tgt_sess *sess) +{ + struct scsi_qla_host *vha = sess->vha; + + vha->hw->tgt_ops->clear_nacl_from_fcport_map(sess); + + list_del(&sess->sess_list_entry); + if (sess->deleted) + list_del(&sess->del_list_entry); + + INIT_WORK(&sess->free_work, qla_tgt_free_session_done); + schedule_work(&sess->free_work); +} +EXPORT_SYMBOL(qla_tgt_unreg_sess); + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess = NULL; + uint32_t unpacked_lun, lun = 0; + uint16_t loop_id; + int res = 0; + imm_ntfy_from_isp_t *n = (imm_ntfy_from_isp_t *)iocb; + atio_from_isp_t *a = (atio_from_isp_t *)iocb; + + loop_id = le16_to_cpu(n->u.isp24.nport_handle); + if (loop_id == 0xFFFF) { +/* FIXME: Re-enable Global event handling.. */ +#if 0 + /* Global event */ + printk("Processing qla_tgt_reset with loop_id=0xffff global event............\n"); + atomic_inc(&ha->qla_tgt->tgt_global_resets_count); + qla_tgt_clear_tgt_db(ha->qla_tgt, 1); + if (!list_empty(&ha->qla_tgt->sess_list)) { + sess = list_entry(ha->qla_tgt->sess_list.next, + typeof(*sess), sess_list_entry); + switch (mcmd) { + case QLA_TGT_NEXUS_LOSS_SESS: + mcmd = QLA_TGT_NEXUS_LOSS; + break; + case QLA_TGT_ABORT_ALL_SESS: + mcmd = QLA_TGT_ABORT_ALL; + break; + case QLA_TGT_NEXUS_LOSS: + case QLA_TGT_ABORT_ALL: + break; + default: + printk(KERN_ERR "qla_target(%d): Not allowed " + "command %x in %s", vha->vp_idx, + mcmd, __func__); + sess = NULL; + break; + } + } else + sess = NULL; +#endif + } else { + sess = ha->tgt_ops->find_sess_by_loop_id(vha, loop_id); + } + + ql_dbg(ql_dbg_tgt, vha, 0xe003, "Using sess for" + " qla_tgt_reset: %p\n", sess); + if (!sess) { + res = -ESRCH; + ha->qla_tgt->tm_to_unknown = 1; + return res; + } + + printk(KERN_INFO "scsi(%ld): resetting (session %p from port " + "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, " + "mcmd %x, loop_id %d)\n", vha->host_no, sess, + sess->port_name[0], sess->port_name[1], + sess->port_name[2], sess->port_name[3], + sess->port_name[4], sess->port_name[5], + sess->port_name[6], sess->port_name[7], + mcmd, loop_id); + + lun = a->u.isp24.fcp_cmnd.lun; + unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); + + return qla_tgt_issue_task_mgmt(sess, unpacked_lun, mcmd, + iocb, QLA24XX_MGMT_SEND_NACK); +} + +/* ha->hardware_lock supposed to be held on entry */ +static void qla_tgt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, bool immediate) +{ + struct qla_tgt *tgt = sess->tgt; + uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; + + if (sess->deleted) + return; + + ql_dbg(ql_dbg_tgt, sess->vha, 0xe004, "Scheduling sess %p for" + " deletion\n", sess); + list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); + sess->deleted = 1; + + if (immediate) + dev_loss_tmo = 0; + + sess->expires = jiffies + dev_loss_tmo * HZ; + + printk(KERN_INFO "qla_target(%d): session for port %02x:%02x:%02x:" + "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for " + "deletion in %u secs (expires: %lu) immed: %d\n", sess->vha->vp_idx, + sess->port_name[0], sess->port_name[1], + sess->port_name[2], sess->port_name[3], + sess->port_name[4], sess->port_name[5], + sess->port_name[6], sess->port_name[7], + sess->loop_id, dev_loss_tmo, sess->expires, immediate); + + if (immediate) + schedule_delayed_work(&tgt->sess_del_work, 0); + else + schedule_delayed_work(&tgt->sess_del_work, jiffies - sess->expires); +} + +/* ha->hardware_lock supposed to be held on entry */ +static void qla_tgt_clear_tgt_db(struct qla_tgt *tgt, bool local_only) +{ + struct qla_tgt_sess *sess; + + list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) + qla_tgt_schedule_sess_for_deletion(sess, true); + + /* At this point tgt could be already dead */ +} + +static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, + uint16_t *loop_id) +{ + struct qla_hw_data *ha = vha->hw; + dma_addr_t gid_list_dma; + struct gid_list_info *gid_list; + char *id_iter; + int res, rc, i; + uint16_t entries; + + gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), + &gid_list_dma, GFP_KERNEL); + if (!gid_list) { + printk(KERN_ERR "qla_target(%d): DMA Alloc failed of %u\n", + vha->vp_idx, qla2x00_gid_list_size(ha)); + return -ENOMEM; + } + + /* Get list of logged in devices */ + rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); + if (rc != QLA_SUCCESS) { + printk(KERN_ERR "qla_target(%d): get_id_list() failed: %x\n", + vha->vp_idx, rc); + res = -1; + goto out_free_id_list; + } + + id_iter = (char *)gid_list; + res = -1; + 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; +} + +static bool qla_tgt_check_fcport_exist(struct scsi_qla_host *vha, struct qla_tgt_sess *sess) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_port_24xx_data *pmap24; + bool res, found = false; + int rc, i; + uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */ + uint16_t entries; + void *pmap; + int pmap_len; + fc_port_t *fcport; + int global_resets; + +retry: + global_resets = atomic_read(&ha->qla_tgt->tgt_global_resets_count); + + rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len); + if (rc != QLA_SUCCESS) { + res = false; + goto out; + } + + pmap24 = pmap; + entries = pmap_len/sizeof(*pmap24); + + for (i = 0; i < entries; ++i) { + if ((sess->port_name[0] == pmap24[i].port_name[0]) && + (sess->port_name[1] == pmap24[i].port_name[1]) && + (sess->port_name[2] == pmap24[i].port_name[2]) && + (sess->port_name[3] == pmap24[i].port_name[3]) && + (sess->port_name[4] == pmap24[i].port_name[4]) && + (sess->port_name[5] == pmap24[i].port_name[5]) && + (sess->port_name[6] == pmap24[i].port_name[6]) && + (sess->port_name[7] == pmap24[i].port_name[7])) { + loop_id = le16_to_cpu(pmap24[i].loop_id); + found = true; + break; + } + } + + kfree(pmap); + + if (!found) { + res = false; + goto out; + } + + printk(KERN_INFO "qla_tgt_check_fcport_exist(): loop_id %d", loop_id); + + fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); + if (fcport == NULL) { + printk(KERN_ERR "qla_target(%d): Allocation of tmp FC port failed", + vha->vp_idx); + res = false; + goto out; + } + + fcport->loop_id = loop_id; + + rc = qla2x00_get_port_database(vha, fcport, 0); + if (rc != QLA_SUCCESS) { + printk(KERN_ERR "qla_target(%d): Failed to retrieve fcport " + "information -- get_port_database() returned %x " + "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); + res = false; + goto out_free_fcport; + } + + if (global_resets != atomic_read(&ha->qla_tgt->tgt_global_resets_count)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe105, "qla_target(%d): global reset" + " during session discovery (counter was %d, new %d)," + " retrying", vha->vp_idx, global_resets, + atomic_read(&ha->qla_tgt->tgt_global_resets_count)); + goto retry; + } + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe106, "Updating sess %p s_id %x:%x:%x, " + "loop_id %d) to d_id %x:%x:%x, loop_id %d", sess, + sess->s_id.b.domain, sess->s_id.b.al_pa, + sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain, + fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id); + + sess->s_id = fcport->d_id; + sess->loop_id = fcport->loop_id; + sess->conf_compl_supported = fcport->conf_compl_supported; + + res = true; + +out_free_fcport: + kfree(fcport); + +out: + return res; +} + +/* ha->hardware_lock supposed to be held on entry */ +static void qla_tgt_undelete_sess(struct qla_tgt_sess *sess) +{ + BUG_ON(!sess->deleted); + + list_del(&sess->del_list_entry); + sess->deleted = 0; +} + +static void qla_tgt_del_sess_work_fn(struct delayed_work *work) +{ + struct qla_tgt *tgt = container_of(work, struct qla_tgt, + sess_del_work); + struct scsi_qla_host *vha = tgt->vha; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess; + unsigned long flags; + + spin_lock_irqsave(&ha->hardware_lock, flags); + while (!list_empty(&tgt->del_sess_list)) { + sess = list_entry(tgt->del_sess_list.next, typeof(*sess), + del_list_entry); + if (time_after_eq(jiffies, sess->expires)) { + bool cancel; + + qla_tgt_undelete_sess(sess); + + spin_unlock_irqrestore(&ha->hardware_lock, flags); + cancel = qla_tgt_check_fcport_exist(vha, sess); + + if (cancel) { + if (sess->deleted) { + /* + * sess was again deleted while we were + * discovering it + */ + spin_lock_irqsave(&ha->hardware_lock, flags); + continue; + } + + printk(KERN_INFO "qla_target(%d): cancel deletion of " + "session for port %02x:%02x:%02x:%02x:%02x:" + "%02x:%02x:%02x (loop ID %d), because it isn't" + " deleted by firmware", vha->vp_idx, + sess->port_name[0], sess->port_name[1], + sess->port_name[2], sess->port_name[3], + sess->port_name[4], sess->port_name[5], + sess->port_name[6], sess->port_name[7], + sess->loop_id); + } else { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe107, "Timeout: sess %p" + " about to be deleted\n", sess); + ha->tgt_ops->put_sess(sess); + } + + spin_lock_irqsave(&ha->hardware_lock, flags); + } else { + schedule_delayed_work(&tgt->sess_del_work, + jiffies - sess->expires); + break; + } + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + +/* + * Adds an extra ref to allow to drop hw lock after adding sess to the list. + * Caller must put it. + */ +static struct qla_tgt_sess *qla_tgt_create_sess( + struct scsi_qla_host *vha, + fc_port_t *fcport, + bool local) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess; + unsigned long flags; + unsigned char be_sid[3]; + + /* Check to avoid double sessions */ +#if 0 + spin_lock_irqsave(&ha->hardware_lock, flags); + list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { + if ((sess->port_name[0] == fcport->port_name[0]) && + (sess->port_name[1] == fcport->port_name[1]) && + (sess->port_name[2] == fcport->port_name[2]) && + (sess->port_name[3] == fcport->port_name[3]) && + (sess->port_name[4] == fcport->port_name[4]) && + (sess->port_name[5] == fcport->port_name[5]) && + (sess->port_name[6] == fcport->port_name[6]) && + (sess->port_name[7] == fcport->port_name[7])) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe108, "Double sess %p" + " found (s_id %x:%x:%x, " + "loop_id %d), updating to d_id %x:%x:%x, " + "loop_id %d", sess, sess->s_id.b.domain, + sess->s_id.b.al_pa, sess->s_id.b.area, + sess->loop_id, fcport->d_id.b.domain, + fcport->d_id.b.al_pa, fcport->d_id.b.area, + fcport->loop_id) + + if (sess->deleted) + qla_tgt_undelete_sess(sess); + + qla_tgt_sess_get(sess); + sess->s_id = fcport->d_id; + sess->loop_id = fcport->loop_id; + sess->conf_compl_supported = fcport->conf_compl_supported; + if (sess->local && !local) + sess->local = 0; + spin_unlock_irqrestore(&ha->hardware_lock, flags); + goto out; + } + } + spin_unlock_irq_restore(&ha->hardware_lock, flags); +#endif + /* We are under tgt_mutex, so a new sess can't be added behind us */ + + sess = kzalloc(sizeof(*sess), GFP_KERNEL); + if (!sess) { + printk(KERN_ERR "qla_target(%u): session allocation failed, " + "all commands from port %02x:%02x:%02x:%02x:" + "%02x:%02x:%02x:%02x will be refused", vha->vp_idx, + fcport->port_name[0], fcport->port_name[1], + fcport->port_name[2], fcport->port_name[3], + fcport->port_name[4], fcport->port_name[5], + fcport->port_name[6], fcport->port_name[7]); + + return NULL; + } + sess->tgt = ha->qla_tgt; + sess->vha = vha; + sess->s_id = fcport->d_id; + sess->loop_id = fcport->loop_id; + sess->local = local; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe109, "Adding sess %p to tgt %p via" + " ->check_initiator_node_acl()\n", sess, ha->qla_tgt); + + be_sid[0] = sess->s_id.b.domain; + be_sid[1] = sess->s_id.b.area; + be_sid[2] = sess->s_id.b.al_pa; + /* + * Determine if this fc_port->port_name is allowed to access + * target mode using explict NodeACLs+MappedLUNs, or using + * TPG demo mode. If this is successful a target mode FC nexus + * is created. + */ + if (ha->tgt_ops->check_initiator_node_acl(vha, &fcport->port_name[0], + sess, &be_sid[0], fcport->loop_id) < 0) { + kfree(sess); + return NULL; + } + /* + * Take an extra reference to ->sess_kref here to handle qla_tgt_sess + * access across ->hardware_lock reaquire. + */ + kref_get(&sess->se_sess->sess_kref); + + sess->conf_compl_supported = fcport->conf_compl_supported; + BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); + memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); + + spin_lock_irqsave(&ha->hardware_lock, flags); + list_add_tail(&sess->sess_list_entry, &ha->qla_tgt->sess_list); + ha->qla_tgt->sess_count++; + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + printk(KERN_INFO "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:" + "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed" + " completion %ssupported) added\n", vha->vp_idx, local ? + "local " : "", fcport->port_name[0], fcport->port_name[1], + fcport->port_name[2], fcport->port_name[3], fcport->port_name[4], + fcport->port_name[5], fcport->port_name[6], fcport->port_name[7], + fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, + sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); + + return sess; +} + +/* + * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port() + */ +void qla_tgt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_sess *sess; + unsigned long flags; + + if (!vha->hw->tgt_ops) + return; + + if (!tgt || (fcport->port_type != FCT_INITIATOR)) + return; + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (tgt->tgt_stop) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + return; + } + sess = qla_tgt_find_sess_by_port_name(tgt, fcport->port_name); + if (!sess) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + mutex_lock(&ha->tgt_mutex); + sess = qla_tgt_create_sess(vha, fcport, false); + mutex_unlock(&ha->tgt_mutex); + + spin_lock_irqsave(&ha->hardware_lock, flags); + } else { + kref_get(&sess->se_sess->sess_kref); + + if (sess->deleted) { + qla_tgt_undelete_sess(sess); + + printk(KERN_INFO "qla_target(%u): %ssession for port %02x:" + "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) " + "reappeared\n", vha->vp_idx, + sess->local ? "local " : "", sess->port_name[0], + sess->port_name[1], sess->port_name[2], + sess->port_name[3], sess->port_name[4], + sess->port_name[5], sess->port_name[6], + sess->port_name[7], sess->loop_id); + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe10a, "Reappeared sess %p\n", sess); + } + sess->s_id = fcport->d_id; + sess->loop_id = fcport->loop_id; + sess->conf_compl_supported = fcport->conf_compl_supported; + } + + if (sess && sess->local) { + printk(KERN_INFO "qla_target(%u): local session for " + "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x " + "(loop ID %d) became global\n", vha->vp_idx, + fcport->port_name[0], fcport->port_name[1], + fcport->port_name[2], fcport->port_name[3], + fcport->port_name[4], fcport->port_name[5], + fcport->port_name[6], fcport->port_name[7], + sess->loop_id); + sess->local = 0; + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + ha->tgt_ops->put_sess(sess); +} + +void qla_tgt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_sess *sess; + unsigned long flags; + + if (!vha->hw->tgt_ops) + return; + + if (!tgt || (fcport->port_type != FCT_INITIATOR)) + return; + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (tgt->tgt_stop) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + return; + } + sess = qla_tgt_find_sess_by_port_name(tgt, fcport->port_name); + if (!sess) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + return; + } + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe10b, "qla_tgt_fc_port_deleted %p", sess); + + sess->local = 1; + qla_tgt_schedule_sess_for_deletion(sess, false); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + +static inline int test_tgt_sess_count(struct qla_tgt *tgt) +{ + struct qla_hw_data *ha = tgt->ha; + unsigned long flags; + int res; + /* + * We need to protect against race, when tgt is freed before or + * inside wake_up() + */ + spin_lock_irqsave(&ha->hardware_lock, flags); + ql_dbg(ql_dbg_tgt, tgt->vha, 0xe005, "tgt %p, empty(sess_list)=%d sess_count=%d\n", + tgt, list_empty(&tgt->sess_list), tgt->sess_count); + res = (tgt->sess_count == 0); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + return res; +} + +/* Called by tcm_qla2xxx configfs code */ +void qla_tgt_stop_phase1(struct qla_tgt *tgt) +{ + struct scsi_qla_host *vha = tgt->vha; + struct qla_hw_data *ha = tgt->ha; + unsigned long flags; + + if (tgt->tgt_stop || tgt->tgt_stopped) { + printk(KERN_ERR "Already in tgt->tgt_stop or tgt_stopped state\n"); + dump_stack(); + return; + } + + ql_dbg(ql_dbg_tgt, vha, 0xe006, "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(&ha->tgt_mutex); + spin_lock_irqsave(&ha->hardware_lock, flags); + tgt->tgt_stop = 1; + qla_tgt_clear_tgt_db(tgt, true); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + mutex_unlock(&ha->tgt_mutex); + + flush_delayed_work_sync(&tgt->sess_del_work); + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe10c, "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, 0xe10d, "Waiting for tgt %p: list_empty(sess_list)=%d " + "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), + tgt->sess_count); + + wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); + + /* Big hammer */ + if (!ha->host_shutting_down && qla_tgt_mode_enabled(vha)) + qla_tgt_disable_vha(vha); + + /* Wait for sessions to clear out (just in case) */ + wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); +} +EXPORT_SYMBOL(qla_tgt_stop_phase1); + +/* Called by tcm_qla2xxx configfs code */ +void qla_tgt_stop_phase2(struct qla_tgt *tgt) +{ + struct qla_hw_data *ha = tgt->ha; + unsigned long flags; + + if (tgt->tgt_stopped) { + printk(KERN_ERR "Already in tgt->tgt_stopped state\n"); + dump_stack(); + return; + } + + ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xe10e, "Waiting for %d IRQ commands to" + " complete (tgt %p)", tgt->irq_cmd_count, tgt); + + mutex_lock(&ha->tgt_mutex); + spin_lock_irqsave(&ha->hardware_lock, flags); + while (tgt->irq_cmd_count != 0) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + udelay(2); + spin_lock_irqsave(&ha->hardware_lock, flags); + } + tgt->tgt_stop = 0; + tgt->tgt_stopped = 1; + spin_unlock_irqrestore(&ha->hardware_lock, flags); + mutex_unlock(&ha->tgt_mutex); + + ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xe10f, "Stop of tgt %p finished", tgt); +} +EXPORT_SYMBOL(qla_tgt_stop_phase2); + +/* Called from qla_tgt_remove_target() -> qla2x00_remove_one() */ +void qla_tgt_release(struct qla_tgt *tgt) +{ + struct qla_hw_data *ha = tgt->ha; + + if ((ha->qla_tgt != NULL) && !tgt->tgt_stopped) + qla_tgt_stop_phase2(tgt); + + ha->qla_tgt = NULL; + + ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xe110, "Release of tgt %p finished\n", tgt); + + kfree(tgt); +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_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 ) { + printk(KERN_ERR "qla_target(%d): Unable to create session " + "work, command will be refused", 0); + return -ENOMEM; + } + + ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xe111, "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); + if (!tgt->sess_works_pending) + tgt->tm_to_unknown = 0; + list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); + tgt->sess_works_pending = 1; + 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 qla_tgt_send_notify_ack(struct scsi_qla_host *vha, + imm_ntfy_from_isp_t *ntfy, + uint32_t add_flags, uint16_t resp_code, int resp_code_valid, + uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) +{ + struct qla_hw_data *ha = vha->hw; + request_t *pkt; + nack_to_isp_t *nack; + + ql_dbg(ql_dbg_tgt, vha, 0xe007, "Sending NOTIFY_ACK (ha=%p)\n", ha); + + /* Send marker if required */ + if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS) + return; + + pkt = (request_t *)qla2x00_req_pkt(vha); + if (!pkt) { + printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate " + "request packet\n", vha->vp_idx, __func__); + return; + } + + if (ha->qla_tgt != NULL) + ha->qla_tgt->notify_ack_expected++; + + pkt->entry_type = NOTIFY_ACK_TYPE; + pkt->entry_count = 1; + + nack = (nack_to_isp_t *)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); + } + 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.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_pkt, vha, 0xe201, + "qla_target(%d): Sending 24xx Notify Ack %d\n", + vha->vp_idx, nack->u.isp24.status); + + qla2x00_start_iocbs(vha, vha->req); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_24xx_send_abts_resp(struct scsi_qla_host *vha, + abts_recv_from_24xx_t *abts, uint32_t status, + bool ids_reversed) +{ + struct qla_hw_data *ha = vha->hw; + abts_resp_to_24xx_t *resp; + uint32_t f_ctl; + uint8_t *p; + + ql_dbg(ql_dbg_tgt, vha, 0xe008, "Sending task mgmt ABTS response" + " (ha=%p, atio=%p, status=%x\n", ha, abts, status); + + /* Send marker if required */ + if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS) + return; + + resp = (abts_resp_to_24xx_t *)qla2x00_req_pkt(vha); + if (!resp) { + printk(KERN_ERR "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 = __constant_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 */ + } + + ha->qla_tgt->abts_resp_expected++; + + qla2x00_start_iocbs(vha, vha->req); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_24xx_retry_term_exchange(struct scsi_qla_host *vha, + abts_resp_from_24xx_fw_t *entry) +{ + ctio7_to_24xx_t *ctio; + + ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending retry TERM EXCH CTIO7" + " (ha=%p)\n", vha->hw); + /* Send marker if required */ + if (qla_tgt_issue_marker(vha, 1) != QLA_SUCCESS) + return; + + ctio = (ctio7_to_24xx_t *)qla2x00_req_pkt(vha); + if (ctio == NULL) { + printk(KERN_ERR "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 = __constant_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 = + __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE); + ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id; + + qla2x00_start_iocbs(vha, vha->req); + + qla_tgt_24xx_send_abts_resp(vha, (abts_recv_from_24xx_t *)entry, + FCP_TMF_CMPL, true); +} + +/* ha->hardware_lock supposed to be held on entry */ +static int __qla_tgt_24xx_handle_abts(struct scsi_qla_host *vha, + abts_recv_from_24xx_t *abts, struct qla_tgt_sess *sess) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_mgmt_cmd *mcmd; + int rc; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe112, "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) { + printk(KERN_ERR "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)); + + rc = ha->tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK, + abts->exchange_addr_to_abort); + if (rc != 0) { + printk(KERN_ERR "qla_target(%d): tgt_ops->handle_tmr()" + " failed: %d", vha->vp_idx, rc); + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); + return -EFAULT; + } + + return 0; +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_24xx_handle_abts(struct scsi_qla_host *vha, + abts_recv_from_24xx_t *abts) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess; + uint32_t tag = abts->exchange_addr_to_abort; + uint8_t s_id[3]; + int rc; + + if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { + printk(KERN_ERR "qla_target(%d): ABTS: Abort Sequence not " + "supported\n", vha->vp_idx); + qla_tgt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); + return; + } + + if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe113, "qla_target(%d): ABTS: Unknown Exchange " + "Address received\n", vha->vp_idx); + qla_tgt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); + return; + } + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe114, "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]; + + sess = ha->tgt_ops->find_sess_by_s_id(vha, s_id); + if (!sess) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe115, "qla_target(%d): task abort for" + " non-existant session\n", vha->vp_idx); + rc = qla_tgt_sched_sess_work(ha->qla_tgt, QLA_TGT_SESS_WORK_ABORT, + abts, sizeof(*abts)); + if (rc != 0) { + ha->qla_tgt->tm_to_unknown = 1; + qla_tgt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); + } + return; + } + + rc = __qla_tgt_24xx_handle_abts(vha, abts, sess); + if (rc != 0) { + printk(KERN_ERR "qla_target(%d): __qla_tgt_24xx_handle_abts() failed: %d\n", + vha->vp_idx, rc); + qla_tgt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); + return; + } +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, + struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) +{ + atio_from_isp_t *atio = &mcmd->orig_iocb.atio; + ctio7_to_24xx_t *ctio; + + ql_dbg(ql_dbg_tgt, ha, 0xe00a, "Sending task mgmt CTIO7 (ha=%p," + " atio=%p, resp_code=%x\n", ha, atio, resp_code); + + /* Send marker if required */ + if (qla_tgt_issue_marker(ha, 1) != QLA_SUCCESS) + return; + + ctio = (ctio7_to_24xx_t *)qla2x00_req_pkt(ha); + if (ctio == NULL) { + printk(KERN_ERR "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 = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); + ctio->vp_index = ha->vp_idx; + ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; + ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; + ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; + ctio->exchange_addr = atio->u.isp24.exchange_addr; + ctio->u.status1.flags = (atio->u.isp24.attr << 9) | __constant_cpu_to_le16( + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS); + ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); + ctio->u.status1.scsi_status = __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); + ctio->u.status1.response_len = __constant_cpu_to_le16(8); + ((uint32_t *)ctio->u.status1.sense_data)[0] = cpu_to_be32(resp_code); + + qla2x00_start_iocbs(ha, ha->req); +} + +void qla_tgt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) +{ + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); +} +EXPORT_SYMBOL(qla_tgt_free_mcmd); + +/* callback from target fabric module code */ +void qla_tgt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) +{ + struct scsi_qla_host *vha = mcmd->sess->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe116, "TM response mcmd" + " (%p) status %#x state %#x", mcmd, mcmd->fc_tm_rsp, + mcmd->flags); + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) + qla_tgt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, + 0, 0, 0, 0, 0, 0); + else { + if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) + qla_tgt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, + mcmd->fc_tm_rsp, false); + else + qla_tgt_24xx_send_task_mgmt_ctio(vha, mcmd, mcmd->fc_tm_rsp); + } + /* + * Make the callback for ->free_mcmd() to queue_work() and invoke + * target_put_sess_cmd() to drop cmd_kref to 1. The final + * target_put_sess_cmd() call will be made from TFO->check_stop_free() + * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd + * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> + * qla_tgt_xmit_tm_rsp() returns here.. + */ + ha->tgt_ops->free_mcmd(mcmd); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} +EXPORT_SYMBOL(qla_tgt_xmit_tm_rsp); + +/* No locks */ +static int qla_tgt_pci_map_calc_cnt(struct qla_tgt_prm *prm) +{ + struct qla_tgt_cmd *cmd = prm->cmd; + + BUG_ON(cmd->sg_cnt == 0); + + prm->sg = (struct scatterlist *)cmd->sg; + prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, + cmd->sg_cnt, cmd->dma_data_direction); + if (unlikely(prm->seg_cnt == 0)) + goto out_err; + + prm->cmd->sg_mapped = 1; + + /* + * If greater than four sg entries then we need to allocate + * the continuation entries + */ + if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) + prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - prm->tgt->datasegs_per_cmd, + prm->tgt->datasegs_per_cont); + + ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe00c, "seg_cnt=%d, req_cnt=%d\n", + prm->seg_cnt, prm->req_cnt); + return 0; + +out_err: + printk(KERN_ERR "qla_target(%d): PCI mapping failed: sg_cnt=%d", + 0, prm->cmd->sg_cnt); + return -1; +} + +static inline void qla_tgt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) +{ + struct qla_hw_data *ha = vha->hw; + + BUG_ON(!cmd->sg_mapped); + pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); + cmd->sg_mapped = 0; +} + +static int qla_tgt_check_reserve_free_req(struct scsi_qla_host *vha, uint32_t req_cnt) +{ + struct qla_hw_data *ha = vha->hw; + device_reg_t __iomem *reg = ha->iobase; + uint32_t cnt; + + if (vha->req->cnt < (req_cnt + 2)) { + cnt = (uint16_t)RD_REG_DWORD(®->isp24.req_q_out); + + ql_dbg(ql_dbg_tgt, vha, 0xe00d, "Request ring circled: cnt=%d, " + "vha->->ring_index=%d, vha->req->cnt=%d, req_cnt=%d\n", + cnt, vha->req->ring_index, vha->req->cnt, req_cnt); + if (vha->req->ring_index < cnt) + vha->req->cnt = cnt - vha->req->ring_index; + else + vha->req->cnt = vha->req->length - + (vha->req->ring_index - cnt); + } + + if (unlikely(vha->req->cnt < (req_cnt + 2))) { + ql_dbg(ql_dbg_tgt, vha, 0xe00e, "qla_target(%d): There is no room in the " + "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, " + "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index, + vha->req->cnt, req_cnt); + return -EAGAIN; + } + vha->req->cnt -= req_cnt; + + return 0; +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static inline void *qla_tgt_get_req_pkt(struct scsi_qla_host *vha) +{ + /* Adjust ring index. */ + vha->req->ring_index++; + if (vha->req->ring_index == vha->req->length) { + vha->req->ring_index = 0; + vha->req->ring_ptr = vha->req->ring; + } else { + vha->req->ring_ptr++; + } + return (cont_entry_t *)vha->req->ring_ptr; +} + +/* ha->hardware_lock supposed to be held on entry */ +static inline uint32_t qla_tgt_make_handle(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + uint32_t h; + + h = ha->current_handle; + /* always increment cmd handle */ + do { + ++h; + if (h > MAX_OUTSTANDING_COMMANDS) + h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ + if (h == ha->current_handle) { + printk(KERN_INFO "qla_target(%d): Ran out of " + "empty cmd slots in ha %p\n", vha->vp_idx, ha); + h = QLA_TGT_NULL_HANDLE; + break; + } + } while ((h == QLA_TGT_NULL_HANDLE) || + (h == QLA_TGT_SKIP_HANDLE) || + (ha->cmds[h-1] != NULL)); + + if (h != QLA_TGT_NULL_HANDLE) + ha->current_handle = h; + + return h; +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, struct scsi_qla_host *vha) +{ + uint32_t h; + ctio7_to_24xx_t *pkt; + struct qla_hw_data *ha = vha->hw; + atio_from_isp_t *atio = &prm->cmd->atio; + + pkt = (ctio7_to_24xx_t *)vha->req->ring_ptr; + prm->pkt = pkt; + memset(pkt, 0, sizeof(*pkt)); + + pkt->entry_type = CTIO_TYPE7; + pkt->entry_count = (uint8_t)prm->req_cnt; + pkt->vp_index = vha->vp_idx; + + h = qla_tgt_make_handle(vha); + if (unlikely(h == QLA_TGT_NULL_HANDLE)) { + /* + * CTIO type 7 from the firmware doesn't provide a way to + * know the initiator's LOOP ID, hence we can't find + * the session and, so, the command. + */ + return -EAGAIN; + } else + ha->cmds[h-1] = prm->cmd; + + pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; + pkt->nport_handle = prm->cmd->loop_id; + pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); + pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; + pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; + pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; + pkt->exchange_addr = atio->u.isp24.exchange_addr; + pkt->u.status0.flags |= (atio->u.isp24.attr << 9); + pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); + pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); + + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe203, "qla_target(%d): handle(cmd) -> %08x, " + "timeout %d, ox_id %#x\n", vha->vp_idx, pkt->handle, + QLA_TGT_TIMEOUT, le16_to_cpu(pkt->u.status0.ox_id)); + 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 qla_tgt_load_cont_data_segments(struct qla_tgt_prm *prm, struct scsi_qla_host *vha) +{ + int cnt; + uint32_t *dword_ptr; + int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; + + /* Build continuation packets */ + while (prm->seg_cnt > 0) { + cont_a64_entry_t *cont_pkt64 = + (cont_a64_entry_t *)qla_tgt_get_req_pkt(vha); + + /* + * Make sure that from cont_pkt64 none of + * 64-bit specific fields used for 32-bit + * addressing. Cast to (cont_entry_t *) for + * that. + */ + + memset(cont_pkt64, 0, sizeof(*cont_pkt64)); + + cont_pkt64->entry_count = 1; + cont_pkt64->sys_define = 0; + + if (enable_64bit_addressing) { + cont_pkt64->entry_type = CONTINUE_A64_TYPE; + dword_ptr = + (uint32_t *)&cont_pkt64->dseg_0_address; + } else { + cont_pkt64->entry_type = CONTINUE_TYPE; + dword_ptr = + (uint32_t *)&((cont_entry_t *) + cont_pkt64)->dseg_0_address; + } + + /* Load continuation entry data segments */ + for (cnt = 0; + cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; + cnt++, prm->seg_cnt--) { + *dword_ptr++ = + cpu_to_le32(pci_dma_lo32 + (sg_dma_address(prm->sg))); + if (enable_64bit_addressing) { + *dword_ptr++ = + cpu_to_le32(pci_dma_hi32 + (sg_dma_address + (prm->sg))); + } + *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); + + ql_dbg(ql_dbg_tgt_sgl, vha, 0xe300, "S/G Segment Cont. phys_addr=" + "%llx:%llx, len=%d\n", + (long long unsigned int)pci_dma_hi32(sg_dma_address(prm->sg)), + (long long unsigned int)pci_dma_lo32(sg_dma_address(prm->sg)), + (int)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 qla_tgt_load_data_segments(struct qla_tgt_prm *prm, + struct scsi_qla_host *vha) +{ + int cnt; + uint32_t *dword_ptr; + int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; + ctio7_to_24xx_t *pkt24 = (ctio7_to_24xx_t *)prm->pkt; + + ql_dbg(ql_dbg_tgt, vha, 0xe00f, + "iocb->scsi_status=%x, iocb->flags=%x\n", + le16_to_cpu(pkt24->u.status0.scsi_status), + le16_to_cpu(pkt24->u.status0.flags)); + + 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 */ + ql_dbg(ql_dbg_tgt_sgl, vha, 0xe303, "%s", "Building S/G data segments..."); + + /* Load command entry data segments */ + for (cnt = 0; + (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; + cnt++, prm->seg_cnt--) { + *dword_ptr++ = + cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); + if (enable_64bit_addressing) { + *dword_ptr++ = + cpu_to_le32(pci_dma_hi32( + sg_dma_address(prm->sg))); + } + *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); + + ql_dbg(ql_dbg_tgt_sgl, vha, 0xe304, "S/G Segment phys_addr=" + "%llx:%llx, len=%d\n", + (long long unsigned int)pci_dma_hi32(sg_dma_address( + prm->sg)), + (long long unsigned int)pci_dma_lo32(sg_dma_address( + prm->sg)), + (int)sg_dma_len(prm->sg)); + + prm->sg = sg_next(prm->sg); + } + + qla_tgt_load_cont_data_segments(prm, vha); +} + +static inline int qla_tgt_has_data(struct qla_tgt_cmd *cmd) +{ + return cmd->bufflen > 0; +} + +/* + * Called without ha->hardware_lock held + */ +static int qla_tgt_pre_xmit_response(struct qla_tgt_cmd *cmd, struct qla_tgt_prm *prm, + int xmit_type, uint8_t scsi_status, uint32_t *full_req_cnt) +{ + struct qla_tgt *tgt = cmd->tgt; + struct scsi_qla_host *vha = tgt->vha; + struct qla_hw_data *ha = vha->hw; + struct se_cmd *se_cmd = &cmd->se_cmd; + + if (unlikely(cmd->aborted)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe118, "qla_target(%d): terminating exchange " + "for aborted cmd=%p (se_cmd=%p, tag=%d)", + vha->vp_idx, cmd, se_cmd, cmd->tag); + + cmd->state = QLA_TGT_STATE_ABORTED; + + qla_tgt_send_term_exchange(vha, cmd, &cmd->atio, 0); + + /* !! At this point cmd could be already freed !! */ + return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; + } + + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe205, "qla_target(%d): tag=%u\n", vha->vp_idx, cmd->tag); + + prm->cmd = cmd; + prm->tgt = tgt; + prm->rq_result = scsi_status; + prm->sense_buffer = &cmd->sense_buffer[0]; + prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; + prm->sg = NULL; + prm->seg_cnt = -1; + prm->req_cnt = 1; + prm->add_status_pkt = 0; + + ql_dbg(ql_dbg_tgt, vha, 0xe010, "rq_result=%x, xmit_type=%x\n", + prm->rq_result, xmit_type); + + /* Send marker if required */ + if (qla_tgt_issue_marker(vha, 0) != QLA_SUCCESS) + return -EFAULT; + + ql_dbg(ql_dbg_tgt, vha, 0xe011, "CTIO start: vha(%d)\n", vha->vp_idx); + + if ((xmit_type & QLA_TGT_XMIT_DATA) && qla_tgt_has_data(cmd)) { + if (qla_tgt_pci_map_calc_cnt(prm) != 0) + return -EAGAIN; + } + + *full_req_cnt = prm->req_cnt; + + if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { + prm->residual = se_cmd->residual_count; + ql_dbg(ql_dbg_tgt, vha, 0xe012, "Residual underflow: %d (tag %d, " + "op %x, bufflen %d, rq_result %x)\n", + prm->residual, cmd->tag, + se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, + cmd->bufflen, prm->rq_result); + prm->rq_result |= SS_RESIDUAL_UNDER; + } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { + prm->residual = se_cmd->residual_count; + ql_dbg(ql_dbg_tgt, vha, 0xe013, "Residual overflow: %d (tag %d, " + "op %x, bufflen %d, rq_result %x)\n", + prm->residual, 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 (qla_tgt_has_data(cmd)) { + if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || + (IS_FWI2_CAPABLE(ha) && + (prm->rq_result != 0))) { + prm->add_status_pkt = 1; + (*full_req_cnt)++; + } + } + } + + ql_dbg(ql_dbg_tgt, vha, 0xe014, "req_cnt=%d, full_req_cnt=%d," + " add_status_pkt=%d\n", prm->req_cnt, *full_req_cnt, + prm->add_status_pkt); + + return 0; +} + +static inline int qla_tgt_need_explicit_conf(struct qla_hw_data *ha, + struct qla_tgt_cmd *cmd, int sending_sense) +{ + if (ha->enable_class_2) + return 0; + + if (sending_sense) + return cmd->conf_compl_supported; + else + return ha->enable_explicit_conf && cmd->conf_compl_supported; +} + +#ifdef CONFIG_QLA_TGT_DEBUG_SRR +/* + * Original taken from the XFS code + */ +static unsigned long qla_tgt_srr_random(void) +{ + static int Inited; + static unsigned long RandomValue; + static DEFINE_SPINLOCK(lock); + /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ + register long rv; + register long lo; + register long hi; + unsigned long flags; + + spin_lock_irqsave(&lock, flags); + if (!Inited) { + RandomValue = jiffies; + Inited = 1; + } + rv = RandomValue; + hi = rv / 127773; + lo = rv % 127773; + rv = 16807 * lo - 2836 * hi; + if (rv <= 0) + rv += 2147483647; + RandomValue = rv; + spin_unlock_irqrestore(&lock, flags); + return rv; +} + +static void qla_tgt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) +{ +#if 0 /* This is not a real status packets lost, so it won't lead to SRR */ + if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qla_tgt_srr_random() % 200) == 50) { + *xmit_type &= ~QLA_TGT_XMIT_STATUS; + ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xe119, "Dropping cmd %p (tag %d) status", + cmd, cmd->tag); + } +#endif + /* + * It's currently not possible to simulate SRRs for FCP_WRITE without + * a physical link layer failure, so don't even try here.. + */ + if (cmd->dma_data_direction != DMA_FROM_DEVICE) + return; + + if (qla_tgt_has_data(cmd) && (cmd->sg_cnt > 1) && + ((qla_tgt_srr_random() % 100) == 20)) { + int i, leave = 0; + unsigned int tot_len = 0; + + while (leave == 0) + leave = qla_tgt_srr_random() % cmd->sg_cnt; + + for (i = 0; i < leave; i++) + tot_len += cmd->sg[i].length; + + ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xe11a, "Cutting cmd %p (tag %d) buffer" + " tail to len %d, sg_cnt %d (cmd->bufflen %d, cmd->sg_cnt %d)", + cmd, cmd->tag, tot_len, leave, cmd->bufflen, cmd->sg_cnt); + + cmd->bufflen = tot_len; + cmd->sg_cnt = leave; + } + + if (qla_tgt_has_data(cmd) && ((qla_tgt_srr_random() % 100) == 70)) { + unsigned int offset = qla_tgt_srr_random() % cmd->bufflen; + + ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xe11b, "Cutting cmd %p (tag %d) buffer head " + "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, + offset, cmd->bufflen); + if (offset == 0) + *xmit_type &= ~QLA_TGT_XMIT_DATA; + else if (qla_tgt_set_data_offset(cmd, offset)) { + ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xe11c, "qla_tgt_set_data_offset()" + " failed (tag %d)", cmd->tag); + } + } +} +#else +static inline void qla_tgt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) {} +#endif + +static void qla_tgt_24xx_init_ctio_to_isp(ctio7_to_24xx_t *ctio, + struct qla_tgt_prm *prm) +{ + prm->sense_buffer_len = min((uint32_t)prm->sense_buffer_len, + (uint32_t)sizeof(ctio->u.status1.sense_data)); + ctio->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); + if (qla_tgt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { + ctio->u.status0.flags |= __constant_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 (qla_tgt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { + if (prm->cmd->se_cmd.scsi_status != 0) { + ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe018, + "Skipping EXPLICIT_CONFORM and CTIO7_FLAGS_CONFORM_REQ" + " for FCP READ w/ non GOOD status\n"); + goto skip_explict_conf; + } + ctio->u.status1.flags |= __constant_cpu_to_le16( + CTIO7_FLAGS_EXPLICIT_CONFORM | + CTIO7_FLAGS_CONFORM_REQ); + } +skip_explict_conf: + ctio->u.status1.flags &= ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); + ctio->u.status1.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); + ctio->u.status1.scsi_status |= __constant_cpu_to_le16(SS_SENSE_LEN_VALID); + ctio->u.status1.sense_length = cpu_to_le16(prm->sense_buffer_len); + for (i = 0; i < prm->sense_buffer_len/4; i++) + ((uint32_t *)ctio->u.status1.sense_data)[i] = + cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); +#if 0 + if (unlikely((prm->sense_buffer_len % 4) != 0)) { + static int q; + if (q < 10) { + printk(KERN_INFO "qla_target(%d): %d bytes of sense " + "lost", prm->tgt->ha->vp_idx, + prm->sense_buffer_len % 4); + q++; + } + } +#endif + } else { + ctio->u.status1.flags &= ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); + ctio->u.status1.flags |= __constant_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 ??? */ +} + +/* + * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * QLA_TGT_XMIT_STATUS + * for >= 24xx silicon + */ +int qla_tgt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, uint8_t scsi_status) +{ + struct scsi_qla_host *vha = cmd->vha; + struct qla_hw_data *ha = vha->hw; + ctio7_to_24xx_t *pkt; + struct qla_tgt_prm prm; + uint32_t full_req_cnt = 0; + unsigned long flags = 0; + int res; + + memset(&prm, 0, sizeof(prm)); + qla_tgt_check_srr_debug(cmd, &xmit_type); + + ql_dbg(ql_dbg_tgt, cmd->vha, 0xe017, "is_send_status=%d," + " cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d", + (xmit_type & QLA_TGT_XMIT_STATUS) ? 1 : 0, cmd->bufflen, + cmd->sg_cnt, cmd->dma_data_direction); + + res = qla_tgt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, &full_req_cnt); + if (unlikely(res != 0)) { + if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) + return 0; + + return res; + } + + spin_lock_irqsave(&ha->hardware_lock, flags); + + /* Does F/W have an IOCBs for this request */ + res = qla_tgt_check_reserve_free_req(vha, full_req_cnt); + if (unlikely(res)) + goto out_unmap_unlock; + + res = qla_tgt_24xx_build_ctio_pkt(&prm, vha); + if (unlikely(res != 0)) + goto out_unmap_unlock; + + + pkt = (ctio7_to_24xx_t *)prm.pkt; + + if (qla_tgt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { + pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | + CTIO7_FLAGS_STATUS_MODE_0); + + qla_tgt_load_data_segments(&prm, vha); + + if (prm.add_status_pkt == 0) { + if (xmit_type & QLA_TGT_XMIT_STATUS) { + pkt->u.status0.scsi_status = cpu_to_le16(prm.rq_result); + pkt->u.status0.residual = cpu_to_le32(prm.residual); + pkt->u.status0.flags |= __constant_cpu_to_le16( + CTIO7_FLAGS_SEND_STATUS); + if (qla_tgt_need_explicit_conf(ha, cmd, 0)) { + pkt->u.status0.flags |= __constant_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(). + */ + ctio7_to_24xx_t *ctio = + (ctio7_to_24xx_t *)qla_tgt_get_req_pkt(vha); + + ql_dbg(ql_dbg_tgt, vha, 0xe019, "Building additional" + " status packet\n"); + + memcpy(ctio, pkt, sizeof(*ctio)); + ctio->entry_count = 1; + ctio->dseg_count = 0; + ctio->u.status1.flags &= ~__constant_cpu_to_le16( + CTIO7_FLAGS_DATA_IN); + + /* Real finish is ctio_m1's finish */ + pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; + pkt->u.status0.flags |= __constant_cpu_to_le16( + CTIO7_FLAGS_DONT_RET_CTIO); + qla_tgt_24xx_init_ctio_to_isp((ctio7_to_24xx_t *)ctio, + &prm); + printk("Status CTIO7: %p\n", ctio); + } + } else + qla_tgt_24xx_init_ctio_to_isp(pkt, &prm); + + + cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ + + ql_dbg(ql_dbg_tgt, vha, 0xe01a, "Xmitting CTIO7 response pkt for 24xx:" + " %p scsi_status: 0x%02x\n", pkt, scsi_status); + + qla2x00_start_iocbs(vha, vha->req); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + return 0; + +out_unmap_unlock: + if (cmd->sg_mapped) + qla_tgt_unmap_sg(vha, cmd); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + return res; +} +EXPORT_SYMBOL(qla_tgt_xmit_response); + +int qla_tgt_rdy_to_xfer(struct qla_tgt_cmd *cmd) +{ + ctio7_to_24xx_t *pkt; + struct scsi_qla_host *vha = cmd->vha; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = cmd->tgt; + struct qla_tgt_prm prm; + unsigned long flags; + int res = 0; + + memset(&prm, 0, sizeof(prm)); + prm.cmd = cmd; + prm.tgt = tgt; + prm.sg = NULL; + prm.req_cnt = 1; + + /* Send marker if required */ + if (qla_tgt_issue_marker(vha, 0) != QLA_SUCCESS) + return -EIO; + + ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)", (int)vha->vp_idx); + + /* Calculate number of entries and segments required */ + if (qla_tgt_pci_map_calc_cnt(&prm) != 0) + return -EAGAIN; + + spin_lock_irqsave(&ha->hardware_lock, flags); + + /* Does F/W have an IOCBs for this request */ + res = qla_tgt_check_reserve_free_req(vha, prm.req_cnt); + if (res != 0) + goto out_unlock_free_unmap; + + res = qla_tgt_24xx_build_ctio_pkt(&prm, vha); + if (unlikely(res != 0)) + goto out_unlock_free_unmap; + pkt = (ctio7_to_24xx_t *)prm.pkt; + pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | + CTIO7_FLAGS_STATUS_MODE_0); + qla_tgt_load_data_segments(&prm, vha); + + cmd->state = QLA_TGT_STATE_NEED_DATA; + + qla2x00_start_iocbs(vha, vha->req); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + return res; + +out_unlock_free_unmap: + if (cmd->sg_mapped) + qla_tgt_unmap_sg(vha, cmd); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + return res; +} +EXPORT_SYMBOL(qla_tgt_rdy_to_xfer); + +/* If hardware_lock held on entry, might drop it, then reaquire */ +/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ +static int __qla_tgt_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, + atio_from_isp_t *atio) +{ + ctio7_to_24xx_t *ctio24; + struct qla_hw_data *ha = vha->hw; + request_t *pkt; + int ret = 0; + + ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); + + pkt = (request_t *)qla2x00_req_pkt(vha); + if (pkt == NULL) { + printk(KERN_ERR "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) { + printk(KERN_ERR "qla_target(%d): Terminating cmd %p with " + "incorrect state %d\n", vha->vp_idx, cmd, + cmd->state); + } else + ret = 1; + } + + pkt->entry_count = 1; + pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; + + ctio24 = (ctio7_to_24xx_t *)pkt; + ctio24->entry_type = CTIO_TYPE7; + ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; + ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); + ctio24->vp_index = vha->vp_idx; + ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; + ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; + ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; + ctio24->exchange_addr = atio->u.isp24.exchange_addr; + ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | __constant_cpu_to_le16( + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE); + ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); + + /* Most likely, it isn't needed */ + ctio24->u.status1.residual = get_unaligned((uint32_t *) + &atio->u.isp24.fcp_cmnd.add_cdb[atio->u.isp24.fcp_cmnd.add_cdb_len]); + if (ctio24->u.status1.residual != 0) + ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; + + qla2x00_start_iocbs(vha, vha->req); + return ret; +} + +static void qla_tgt_send_term_exchange(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, + atio_from_isp_t *atio, int ha_locked) +{ + unsigned long flags; + int rc; + + if (qla_tgt_issue_marker(vha, ha_locked) < 0) + return; + + if (ha_locked) { + rc = __qla_tgt_send_term_exchange(vha, cmd, atio); + goto done; + } + spin_lock_irqsave(&vha->hw->hardware_lock, flags); + rc = __qla_tgt_send_term_exchange(vha, cmd, atio); + spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); +done: + if (rc == 1) { + if (!ha_locked && !in_interrupt()) + msleep(250); /* just in case */ + + vha->hw->tgt_ops->free_cmd(cmd); + } +} + +void qla_tgt_free_cmd(struct qla_tgt_cmd *cmd) +{ + BUG_ON(cmd->sg_mapped); + + if (unlikely(cmd->free_sg)) + kfree(cmd->sg); + kmem_cache_free(qla_tgt_cmd_cachep, cmd); +} +EXPORT_SYMBOL(qla_tgt_free_cmd); + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_prepare_srr_ctio(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, + void *ctio) +{ + struct qla_tgt_srr_ctio *sc; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_srr_imm *imm; + + tgt->ctio_srr_id++; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe11d, "qla_target(%d): CTIO with SRR " + "status received\n", vha->vp_idx); + + if (!ctio) { + printk(KERN_ERR "qla_target(%d): SRR CTIO, " + "but ctio is NULL\n", vha->vp_idx); + return EINVAL; + } + + sc = kzalloc(sizeof(*sc), GFP_ATOMIC); + if (sc != NULL) { + sc->cmd = cmd; + /* IRQ is already OFF */ + spin_lock(&tgt->srr_lock); + sc->srr_id = tgt->ctio_srr_id; + list_add_tail(&sc->srr_list_entry, + &tgt->srr_ctio_list); + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe11e, "CTIO SRR %p added (id %d)\n", + sc, sc->srr_id); + if (tgt->imm_srr_id == tgt->ctio_srr_id) { + int found = 0; + list_for_each_entry(imm, &tgt->srr_imm_list, + srr_list_entry) { + if (imm->srr_id == sc->srr_id) { + found = 1; + break; + } + } + if (found) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe11f, + "Scheduling srr work\n"); + schedule_work(&tgt->srr_work); + } else { + printk(KERN_ERR "qla_target(%d): imm_srr_id " + "== ctio_srr_id (%d), but there is no " + "corresponding SRR IMM, deleting CTIO " + "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, + sc); + list_del(&sc->srr_list_entry); + spin_unlock(&tgt->srr_lock); + + kfree(sc); + return -EINVAL; + } + } + spin_unlock(&tgt->srr_lock); + } else { + struct qla_tgt_srr_imm *ti; + + printk(KERN_ERR "qla_target(%d): Unable to allocate SRR CTIO entry\n", + vha->vp_idx); + spin_lock(&tgt->srr_lock); + list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, + srr_list_entry) { + if (imm->srr_id == tgt->ctio_srr_id) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe120, "IMM SRR %p" + " deleted (id %d)\n", imm, imm->srr_id); + list_del(&imm->srr_list_entry); + qla_tgt_reject_free_srr_imm(vha, imm, 1); + } + } + spin_unlock(&tgt->srr_lock); + + return -ENOMEM; + } + + return 0; +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static int qla_tgt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, + struct qla_tgt_cmd *cmd, uint32_t status) +{ + int term = 0; + + if (ctio != NULL) { + ctio7_from_24xx_t *c = (ctio7_from_24xx_t *)ctio; + term = !(c->flags & + __constant_cpu_to_le16(OF_TERM_EXCH)); + } else + term = 1; + + if (term) + qla_tgt_send_term_exchange(vha, cmd, &cmd->atio, 1); + + return term; +} + +/* ha->hardware_lock supposed to be held on entry */ +static inline struct qla_tgt_cmd *qla_tgt_get_cmd(struct scsi_qla_host *vha, uint32_t handle) +{ + struct qla_hw_data *ha = vha->hw; + + handle--; + if (ha->cmds[handle] != NULL) { + struct qla_tgt_cmd *cmd = ha->cmds[handle]; + ha->cmds[handle] = NULL; + return cmd; + } else + return NULL; +} + +/* ha->hardware_lock supposed to be held on entry */ +static struct qla_tgt_cmd *qla_tgt_ctio_to_cmd(struct scsi_qla_host *vha, uint32_t handle, + void *ctio) +{ + struct qla_tgt_cmd *cmd = NULL; + + /* Clear out internal marks */ + handle &= ~(CTIO_COMPLETION_HANDLE_MARK | CTIO_INTERMEDIATE_HANDLE_MARK); + + if (handle != QLA_TGT_NULL_HANDLE) { + if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) { + ql_dbg(ql_dbg_tgt, vha, 0xe01e, "%s", "SKIP_HANDLE CTIO\n"); + return NULL; + } + /* handle-1 is actually used */ + if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) { + printk(KERN_ERR "qla_target(%d): Wrong handle %x " + "received\n", vha->vp_idx, handle); + return NULL; + } + cmd = qla_tgt_get_cmd(vha, handle); + if (unlikely(cmd == NULL)) { + printk(KERN_WARNING "qla_target(%d): Suspicious: unable to " + "find the command with handle %x\n", + vha->vp_idx, handle); + return NULL; + } + } else if (ctio != NULL) { + /* We can't get loop ID from CTIO7 */ + printk(KERN_ERR "qla_target(%d): Wrong CTIO received: " + "QLA24xx doesn't support NULL handles\n", + vha->vp_idx); + return NULL; + } + + return cmd; +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, + uint32_t status, void *ctio) +{ + struct qla_hw_data *ha = vha->hw; + struct se_cmd *se_cmd; + struct target_core_fabric_ops *tfo; + struct qla_tgt_cmd *cmd; + + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe206, "qla_target(%d): handle(ctio %p status" + " %#x) <- %08x\n", vha->vp_idx, ctio, status, handle); + + 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, 0xe121, "Intermediate CTIO received" + " (status %x)\n", status); + } + return; + } + + cmd = qla_tgt_ctio_to_cmd(vha, handle, ctio); + if (cmd == NULL) { + if (status != CTIO_SUCCESS) + qla_tgt_term_ctio_exchange(vha, ctio, NULL, status); + return; + } + se_cmd = &cmd->se_cmd; + tfo = se_cmd->se_tfo; + + if (cmd->sg_mapped) + qla_tgt_unmap_sg(vha, cmd); + + if (unlikely(status != CTIO_SUCCESS)) { + switch (status & 0xFFFF) { + case CTIO_LIP_RESET: + case CTIO_TARGET_RESET: + case CTIO_ABORTED: + case CTIO_TIMEOUT: + case CTIO_INVALID_RX_ID: + /* They are OK */ + printk(KERN_INFO "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: + printk(KERN_INFO "qla_target(%d): CTIO with PORT LOGGED " + "OUT (29) or PORT UNAVAILABLE (28) status %x " + "received (state %x, se_cmd %p)\n", + vha->vp_idx, status, cmd->state, se_cmd); + break; + + case CTIO_SRR_RECEIVED: + printk(KERN_INFO "qla_target(%d): CTIO with SRR_RECEIVED" + " status %x received (state %x, se_cmd %p)\n", + vha->vp_idx, status, cmd->state, se_cmd); + if (qla_tgt_prepare_srr_ctio(vha, cmd, ctio) != 0) + break; + else + return; + + default: + printk(KERN_ERR "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; + } + + if (cmd->state != QLA_TGT_STATE_NEED_DATA) + if (qla_tgt_term_ctio_exchange(vha, ctio, cmd, status)) + return; + } + + if (cmd->state == QLA_TGT_STATE_PROCESSED) { + ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd); + } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { + int rx_status = 0; + + cmd->state = QLA_TGT_STATE_DATA_IN; + + if (unlikely(status != CTIO_SUCCESS)) + rx_status = -EIO; + else + cmd->write_data_transferred = 1; + + ql_dbg(ql_dbg_tgt, vha, 0xe020, "Data received, context %x," + " rx_status %d\n", 0x0, rx_status); + + ha->tgt_ops->handle_data(cmd); + return; + } else if (cmd->state == QLA_TGT_STATE_ABORTED) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe122, "Aborted command %p (tag %d) finished\n", + cmd, cmd->tag); + } else { + printk(KERN_ERR "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)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe123, "Finishing failed CTIO\n"); + dump_stack(); + } + + ha->tgt_ops->free_cmd(cmd); +} + +/* ha->hardware_lock supposed to be held on entry */ +/* called via callback from qla2xxx */ +void qla_tgt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + + if (likely(tgt == NULL)) { + ql_dbg(ql_dbg_tgt, vha, 0xe021, "CTIO, but target mode not enabled" + " (ha %d %p handle %#x)", vha->vp_idx, ha, handle); + return; + } + + tgt->irq_cmd_count++; + qla_tgt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL); + tgt->irq_cmd_count--; +} + +static inline int qla_tgt_get_fcp_task_attr(uint8_t task_codes) +{ + int fcp_task_attr; + + switch (task_codes) { + case ATIO_SIMPLE_QUEUE: + fcp_task_attr = MSG_SIMPLE_TAG; + break; + case ATIO_HEAD_OF_QUEUE: + fcp_task_attr = MSG_HEAD_TAG; + break; + case ATIO_ORDERED_QUEUE: + fcp_task_attr = MSG_ORDERED_TAG; + break; + case ATIO_ACA_QUEUE: + fcp_task_attr = MSG_ACA_TAG; + break; + case ATIO_UNTAGGED: + fcp_task_attr = MSG_SIMPLE_TAG; + break; + default: + printk(KERN_WARNING "qla_target: unknown task code %x, use " + "ORDERED instead\n", task_codes); + fcp_task_attr = MSG_ORDERED_TAG; + break; + } + + return fcp_task_attr; +} + +static struct qla_tgt_sess *qla_tgt_make_local_sess(struct scsi_qla_host *, + uint8_t *); +/* + * Process context for I/O path into tcm_qla2xxx code + */ +static void qla_tgt_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; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_sess *sess = cmd->sess; + atio_from_isp_t *atio = &cmd->atio; + unsigned char *cdb; + unsigned long flags; + uint32_t data_length; + int ret, fcp_task_attr, data_dir, bidi = 0;; + + if (tgt->tgt_stop) + goto out_term; + + if (!sess) { + uint8_t *s_id = NULL; + + s_id = atio->u.isp24.fcp_hdr.s_id; + + mutex_lock(&ha->tgt_mutex); + cmd->sess = sess = qla_tgt_make_local_sess(vha, s_id); + /* sess has got an extra creation ref */ + mutex_unlock(&ha->tgt_mutex); + + if (!sess) + goto out_term; + cmd->loop_id = sess->loop_id; + } + + if (tgt->tgt_stop) + goto out_term; + + cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; + cmd->tag = atio->u.isp24.exchange_addr; + cmd->unpacked_lun = scsilun_to_int( + (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); + + if (atio->u.isp24.fcp_cmnd.rddata && + atio->u.isp24.fcp_cmnd.wrdata) { + bidi = 1; + data_dir = DMA_TO_DEVICE; + } else if (atio->u.isp24.fcp_cmnd.rddata) + data_dir = DMA_FROM_DEVICE; + else if (atio->u.isp24.fcp_cmnd.wrdata) + data_dir = DMA_TO_DEVICE; + else + data_dir = DMA_NONE; + + fcp_task_attr = qla_tgt_get_fcp_task_attr( + atio->u.isp24.fcp_cmnd.task_attr); + data_length = be32_to_cpu(get_unaligned((uint32_t *) + &atio->u.isp24.fcp_cmnd.add_cdb[ + atio->u.isp24.fcp_cmnd.add_cdb_len])); + + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe207, "qla_target: START qla command: %p" + " lun: 0x%04x (tag %d)\n", cmd, cmd->unpacked_lun, cmd->tag); + + ret = vha->hw->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_ops->put_sess(sess); + return; + +out_term: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe14d, "Terminating work cmd %p", cmd); + /* + * cmd has not sent to target yet, so pass NULL as the second argument + */ + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_send_term_exchange(vha, NULL, &cmd->atio, 1); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (sess) + ha->tgt_ops->put_sess(sess); +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_handle_cmd_for_atio(struct scsi_qla_host *vha, + atio_from_isp_t *atio) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_sess *sess; + struct qla_tgt_cmd *cmd; + int res = 0; + + if (unlikely(tgt->tgt_stop)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe124, "New command while device %p" + " is shutting down\n", tgt); + return -EFAULT; + } + + cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC); + if (!cmd) { + printk(KERN_INFO "qla_target(%d): Allocation of cmd " + "failed\n", vha->vp_idx); + return -ENOMEM; + } + + INIT_LIST_HEAD(&cmd->cmd_list); + + memcpy(&cmd->atio, atio, sizeof(*atio)); + cmd->state = QLA_TGT_STATE_NEW; + cmd->tgt = ha->qla_tgt; + cmd->vha = vha; + + sess = ha->tgt_ops->find_sess_by_s_id(vha, + atio->u.isp24.fcp_hdr.s_id); + if (unlikely(!sess)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe125, "qla_target(%d):" + " Unable to find wwn login (s_id %x:%x:%x)," + " trying to create it manually\n", vha->vp_idx, + atio->u.isp24.fcp_hdr.s_id[0], + atio->u.isp24.fcp_hdr.s_id[1], + atio->u.isp24.fcp_hdr.s_id[2]); + + if (atio->u.raw.entry_count > 1) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe127, "Dropping multy entry" + " cmd %p\n", cmd); + goto out_free_cmd; + } + goto out_sched; + } + + if (sess->tearing_down || tgt->tgt_stop) + goto out_free_cmd; + + cmd->sess = sess; + cmd->loop_id = sess->loop_id; + cmd->conf_compl_supported = sess->conf_compl_supported; + /* + * Get the extra kref_get() before dropping qla_hw_data->hardware_lock, + * and call kref_put() in qla_tgt_do_work() process context to drop the + * extra reference. + */ + kref_get(&sess->se_sess->sess_kref); + +out_sched: + INIT_WORK(&cmd->work, qla_tgt_do_work); + queue_work(qla_tgt_wq, &cmd->work); + return 0; + +out_free_cmd: + qla_tgt_free_cmd(cmd); + return res; +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, + int fn, void *iocb, int flags) +{ + struct scsi_qla_host *vha = sess->vha; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_mgmt_cmd *mcmd; + int res; + uint8_t tmr_func; + + mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); + if (!mcmd) { + printk(KERN_ERR "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; + + switch (fn) { + case QLA_TGT_CLEAR_ACA: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe400, "qla_target(%d): CLEAR_ACA received\n", + sess->vha->vp_idx); + tmr_func = TMR_CLEAR_ACA; + break; + + case QLA_TGT_TARGET_RESET: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe401, "qla_target(%d): TARGET_RESET received\n", + sess->vha->vp_idx); + tmr_func = TMR_TARGET_WARM_RESET; + break; + + case QLA_TGT_LUN_RESET: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe402, "qla_target(%d): LUN_RESET received\n", + sess->vha->vp_idx); + tmr_func = TMR_LUN_RESET; + break; + + case QLA_TGT_CLEAR_TS: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe403, "qla_target(%d): CLEAR_TS received\n", + sess->vha->vp_idx); + tmr_func = TMR_CLEAR_TASK_SET; + break; + + case QLA_TGT_ABORT_TS: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe405, "qla_target(%d): ABORT_TS received\n", + sess->vha->vp_idx); + tmr_func = TMR_ABORT_TASK_SET; + break; +#if 0 + case QLA_TGT_ABORT_ALL: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe406, "qla_target(%d): Doing ABORT_ALL_TASKS\n", + sess->vha->vp_idx); + tmr_func = 0; + break; + + case QLA_TGT_ABORT_ALL_SESS: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe407, "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", + sess->vha->vp_idx); + tmr_func = 0; + break; + + case QLA_TGT_NEXUS_LOSS_SESS: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe408, "qla_target(%d): Doing NEXUS_LOSS_SESS\n", + sess->vha->vp_idx); + tmr_func = 0; + break; + + case QLA_TGT_NEXUS_LOSS: + ql_dbg(ql_dbg_tgt_tmr, vha, 0xe409, "qla_target(%d): Doing NEXUS_LOSS\n", + sess->vha->vp_idx)); + tmr_func = 0; + break; +#endif + default: + printk(KERN_ERR "qla_target(%d): Unknown task mgmt fn 0x%x\n", + sess->vha->vp_idx, fn); + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); + return -ENOSYS; + } + + res = ha->tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); + if (res != 0) { + printk(KERN_ERR "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", + sess->vha->vp_idx, res); + mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); + return -EFAULT; + } + + return 0; +} + +/* ha->hardware_lock supposed to be held on entry */ +static int qla_tgt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) +{ + atio_from_isp_t *a = (atio_from_isp_t *)iocb; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt; + struct qla_tgt_sess *sess; + uint32_t lun, unpacked_lun; + int lun_size, fn, res = 0; + + tgt = ha->qla_tgt; + + lun = a->u.isp24.fcp_cmnd.lun; + lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); + fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; + sess = ha->tgt_ops->find_sess_by_s_id(vha, + a->u.isp24.fcp_hdr.s_id); + unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); + + if (!sess) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe128, "qla_target(%d): task mgmt fn 0x%x for " + "non-existant session\n", vha->vp_idx, fn); + res = qla_tgt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, + sizeof(atio_from_isp_t)); + if (res != 0) + tgt->tm_to_unknown = 1; + + return res; + } + + return qla_tgt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); +} + +/* ha->hardware_lock supposed to be held on entry */ +static int __qla_tgt_abort_task(struct scsi_qla_host *vha, + imm_ntfy_from_isp_t *iocb, struct qla_tgt_sess *sess) +{ + atio_from_isp_t *a = (atio_from_isp_t *)iocb; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_mgmt_cmd *mcmd; + uint32_t lun, unpacked_lun; + int rc; + + mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); + if (mcmd == NULL) { + printk(KERN_ERR "qla_target(%d): %s: Allocation of ABORT" + " cmd failed\n", vha->vp_idx, __func__); + return -ENOMEM; + } + memset(mcmd, 0, sizeof(*mcmd)); + + mcmd->sess = sess; + memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, sizeof(mcmd->orig_iocb.imm_ntfy)); + + lun = a->u.isp24.fcp_cmnd.lun; + unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); + + rc = ha->tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, + le16_to_cpu(iocb->u.isp2x.seq_id)); + if (rc != 0) { + printk(KERN_ERR "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 qla_tgt_abort_task(struct scsi_qla_host *vha, imm_ntfy_from_isp_t *iocb) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess; + int loop_id, res; + + loop_id = GET_TARGET_ID(ha, (atio_from_isp_t *)iocb); + + sess = ha->tgt_ops->find_sess_by_loop_id(vha, loop_id); + if (sess == NULL) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe129, "qla_target(%d): task abort for unexisting " + "session\n", vha->vp_idx); + res = qla_tgt_sched_sess_work(ha->qla_tgt, QLA_TGT_SESS_WORK_ABORT, + iocb, sizeof(*iocb)); + if (res != 0) + sess->tgt->tm_to_unknown = 1; + + return res; + } + + return __qla_tgt_abort_task(vha, iocb, sess); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static int qla_tgt_24xx_handle_els(struct scsi_qla_host *vha, + imm_ntfy_from_isp_t *iocb) +{ + struct qla_hw_data *ha = vha->hw; + int res = 0; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe12a, "qla_target(%d): Port ID: 0x%02x:%02x:%02x" + " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0], + iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2], + iocb->u.isp24.status_subcode); + + switch (iocb->u.isp24.status_subcode) { + case ELS_PLOGI: + case ELS_FLOGI: + case ELS_PRLI: + case ELS_LOGO: + case ELS_PRLO: + res = qla_tgt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); + break; + case ELS_PDISC: + case ELS_ADISC: + { + struct qla_tgt *tgt = ha->qla_tgt; + if (tgt->link_reinit_iocb_pending) { + qla_tgt_send_notify_ack(vha, &tgt->link_reinit_iocb, + 0, 0, 0, 0, 0, 0); + tgt->link_reinit_iocb_pending = 0; + } + res = 1; /* send notify ack */ + break; + } + + default: + printk(KERN_ERR "qla_target(%d): Unsupported ELS command %x " + "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); + res = qla_tgt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); + break; + } + + return res; +} + +static int qla_tgt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) +{ + struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; + size_t first_offset = 0, rem_offset = offset, tmp = 0; + int i, sg_srr_cnt, bufflen = 0; + + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe305, "Entering qla_tgt_set_data_offset:" + " cmd: %p, cmd->sg: %p, cmd->sg_cnt: %u, direction: %d\n", + cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); + + /* + * FIXME: Reject non zero SRR relative offset until we can test + * this code properly. + */ + printk("Rejecting non zero SRR rel_offs: %u\n", offset); + return -1; + + if (!cmd->sg || !cmd->sg_cnt) { + printk(KERN_ERR "Missing cmd->sg or zero cmd->sg_cnt in" + " qla_tgt_set_data_offset\n"); + return -EINVAL; + } + /* + * Walk the current cmd->sg list until we locate the new sg_srr_start + */ + for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe306, "sg[%d]: %p page: %p," + " length: %d, offset: %d\n", i, sg, sg_page(sg), + sg->length, sg->offset); + + if ((sg->length + tmp) > offset) { + first_offset = rem_offset; + sg_srr_start = sg; + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe307, "Found matching sg[%d]," + " using %p as sg_srr_start, and using first_offset:" + " %lu\n", i, sg, first_offset); + break; + } + tmp += sg->length; + rem_offset -= sg->length; + } + + if (!sg_srr_start) { + printk(KERN_ERR "Unable to locate sg_srr_start for offset: %u\n", offset); + return -EINVAL; + } + sg_srr_cnt = (cmd->sg_cnt - i); + + sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); + if (!sg_srr) { + printk(KERN_ERR "Unable to allocate sgp\n"); + return -ENOMEM; + } + sg_init_table(sg_srr, sg_srr_cnt); + sgp = &sg_srr[0]; + /* + * Walk the remaining list for sg_srr_start, mapping to the newly + * allocated sg_srr taking first_offset into account. + */ + for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { + if (first_offset) { + sg_set_page(sgp, sg_page(sg), + (sg->length - first_offset), first_offset); + first_offset = 0; + } else { + sg_set_page(sgp, sg_page(sg), sg->length, 0); + } + bufflen += sgp->length; + + sgp = sg_next(sgp); + if (!sgp) + break; + } + + cmd->sg = sg_srr; + cmd->sg_cnt = sg_srr_cnt; + cmd->bufflen = bufflen; + cmd->offset += offset; + cmd->free_sg = 1; + + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe308, "New cmd->sg: %p\n", cmd->sg); + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe309, "New cmd->sg_cnt: %u\n", cmd->sg_cnt); + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe30b, "New cmd->bufflen: %u\n", cmd->bufflen); + ql_dbg(ql_dbg_tgt_sgl, cmd->vha, 0xe30c, "New cmd->offset: %u\n", cmd->offset); + + if (cmd->sg_cnt < 0) + BUG(); + + if (cmd->bufflen < 0) + BUG(); + + return 0; +} + +static inline int qla_tgt_srr_adjust_data(struct qla_tgt_cmd *cmd, + uint32_t srr_rel_offs, int *xmit_type) +{ + int res = 0, rel_offs; + + rel_offs = srr_rel_offs - cmd->offset; + ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xe12b, "srr_rel_offs=%d, rel_offs=%d", + srr_rel_offs, rel_offs); + + *xmit_type = QLA_TGT_XMIT_ALL; + + if (rel_offs < 0) { + printk(KERN_ERR "qla_target(%d): SRR rel_offs (%d) " + "< 0", cmd->vha->vp_idx, rel_offs); + res = -1; + } else if (rel_offs == cmd->bufflen) + *xmit_type = QLA_TGT_XMIT_STATUS; + else if (rel_offs > 0) + res = qla_tgt_set_data_offset(cmd, rel_offs); + + return res; +} + +/* No locks, thread context */ +static void qla_tgt_handle_srr(struct scsi_qla_host *vha, struct qla_tgt_srr_ctio *sctio, + struct qla_tgt_srr_imm *imm) +{ + imm_ntfy_from_isp_t *ntfy = (imm_ntfy_from_isp_t *)&imm->imm_ntfy; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_cmd *cmd = sctio->cmd; + struct se_cmd *se_cmd = &cmd->se_cmd; + unsigned long flags; + int xmit_type = 0, resp = 0; + uint32_t offset; + uint16_t srr_ui; + + offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); + srr_ui = ntfy->u.isp24.srr_ui; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe12c, "SRR cmd %p, srr_ui %x\n", + cmd, srr_ui); + + switch (srr_ui) { + case SRR_IU_STATUS: + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_send_notify_ack(vha, ntfy, + 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + xmit_type = QLA_TGT_XMIT_STATUS; + resp = 1; + break; + case SRR_IU_DATA_IN: + if (!cmd->sg || !cmd->sg_cnt) { + printk(KERN_ERR "Unable to process SRR_IU_DATA_IN due to" + " missing cmd->sg, state: %d\n", cmd->state); + dump_stack(); + goto out_reject; + } + if (se_cmd->scsi_status != 0) { + ql_dbg(ql_dbg_tgt, vha, 0xe022, "Rejecting SRR_IU_DATA_IN" + " with non GOOD scsi_status\n"); + goto out_reject; + } + cmd->bufflen = se_cmd->data_length; + + if (qla_tgt_has_data(cmd)) { + if (qla_tgt_srr_adjust_data(cmd, offset, &xmit_type) != 0) + goto out_reject; + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_send_notify_ack(vha, ntfy, + 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + resp = 1; + } else { + printk(KERN_ERR "qla_target(%d): SRR for in data for cmd " + "without them (tag %d, SCSI status %d), " + "reject", vha->vp_idx, cmd->tag, + cmd->se_cmd.scsi_status); + goto out_reject; + } + break; + case SRR_IU_DATA_OUT: + if (!cmd->sg || !cmd->sg_cnt) { + printk(KERN_ERR "Unable to process SRR_IU_DATA_OUT due to" + " missing cmd->sg\n"); + dump_stack(); + goto out_reject; + } + if (se_cmd->scsi_status != 0) { + ql_dbg(ql_dbg_tgt, vha, 0xe023, "Rejecting SRR_IU_DATA_OUT" + " with non GOOD scsi_status\n"); + goto out_reject; + } + cmd->bufflen = se_cmd->data_length; + + if (qla_tgt_has_data(cmd)) { + if (qla_tgt_srr_adjust_data(cmd, offset, &xmit_type) != 0) + goto out_reject; + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_send_notify_ack(vha, ntfy, + 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (xmit_type & QLA_TGT_XMIT_DATA) + qla_tgt_rdy_to_xfer(cmd); + } else { + printk(KERN_ERR "qla_target(%d): SRR for out data for cmd " + "without them (tag %d, SCSI status %d), " + "reject", vha->vp_idx, cmd->tag, + cmd->se_cmd.scsi_status); + goto out_reject; + } + break; + default: + printk(KERN_ERR "qla_target(%d): Unknown srr_ui value %x", + vha->vp_idx, srr_ui); + goto out_reject; + } + + /* Transmit response in case of status and data-in cases */ + if (resp) { + qla_tgt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); + } + + return; + +out_reject: + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_send_notify_ack(vha, ntfy, 0, 0, 0, + NOTIFY_ACK_SRR_FLAGS_REJECT, + NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, + NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); + if (cmd->state == QLA_TGT_STATE_NEED_DATA) { + cmd->state = QLA_TGT_STATE_DATA_IN; + dump_stack(); + } else + qla_tgt_send_term_exchange(vha, cmd, &cmd->atio, 1); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + +static void qla_tgt_reject_free_srr_imm(struct scsi_qla_host *vha, struct qla_tgt_srr_imm *imm, + int ha_locked) +{ + struct qla_hw_data *ha = vha->hw; + unsigned long flags = 0; + + if (!ha_locked) + spin_lock_irqsave(&ha->hardware_lock, flags); + + qla_tgt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, + NOTIFY_ACK_SRR_FLAGS_REJECT, + NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, + NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); + + if (!ha_locked) + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + kfree(imm); +} + +static void qla_tgt_handle_srr_work(struct work_struct *work) +{ + struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); + struct scsi_qla_host *vha = tgt->vha; + struct qla_tgt_srr_ctio *sctio; + unsigned long flags; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe12e, "Entering SRR work (tgt %p)\n", tgt); + +restart: + spin_lock_irqsave(&tgt->srr_lock, flags); + list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { + struct qla_tgt_srr_imm *imm, *i, *ti; + struct qla_tgt_cmd *cmd; + struct se_cmd *se_cmd; + + imm = NULL; + list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, + srr_list_entry) { + if (i->srr_id == sctio->srr_id) { + list_del(&i->srr_list_entry); + if (imm) { + printk(KERN_ERR "qla_target(%d): There must " + "be only one IMM SRR per CTIO SRR " + "(IMM SRR %p, id %d, CTIO %p\n", + vha->vp_idx, i, i->srr_id, sctio); + qla_tgt_reject_free_srr_imm(tgt->vha, i, 0); + } else + imm = i; + } + } + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe12f, "IMM SRR %p, CTIO SRR %p (id %d)\n", + imm, sctio, sctio->srr_id); + + if (imm == NULL) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe130, "Not found matching IMM" + " for SRR CTIO (id %d)\n", sctio->srr_id); + continue; + } else + list_del(&sctio->srr_list_entry); + + spin_unlock_irqrestore(&tgt->srr_lock, flags); + + cmd = sctio->cmd; + /* + * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow + * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() + * logic.. + */ + cmd->offset = 0; + if (cmd->free_sg) { + kfree(cmd->sg); + cmd->sg = NULL; + cmd->free_sg = 0; + } + se_cmd = &cmd->se_cmd; + + cmd->sg_cnt = se_cmd->t_tasks_sg_chained_no; + cmd->sg = se_cmd->t_tasks_sg_chained; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe131, "SRR cmd %p (se_cmd %p, tag %d, op %x), " + "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, + cmd->tag, se_cmd->t_task_cdb[0], cmd->sg_cnt, + cmd->offset); + + qla_tgt_handle_srr(vha, sctio, imm); + + kfree(imm); + kfree(sctio); + goto restart; + } + spin_unlock_irqrestore(&tgt->srr_lock, flags); +} + +/* ha->hardware_lock supposed to be held on entry */ +static void qla_tgt_prepare_srr_imm(struct scsi_qla_host *vha, + imm_ntfy_from_isp_t *iocb) +{ + struct qla_tgt_srr_imm *imm; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + struct qla_tgt_srr_ctio *sctio; + + tgt->imm_srr_id++; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe132, "qla_target(%d): SRR received\n", + vha->vp_idx); + + imm = kzalloc(sizeof(*imm), GFP_ATOMIC); + if (imm != NULL) { + memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); + + /* IRQ is already OFF */ + spin_lock(&tgt->srr_lock); + imm->srr_id = tgt->imm_srr_id; + list_add_tail(&imm->srr_list_entry, + &tgt->srr_imm_list); + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe133, "IMM NTFY SRR %p added (id %d," + " ui %x)\n", imm, imm->srr_id, iocb->u.isp24.srr_ui); + if (tgt->imm_srr_id == tgt->ctio_srr_id) { + int found = 0; + list_for_each_entry(sctio, &tgt->srr_ctio_list, + srr_list_entry) { + if (sctio->srr_id == imm->srr_id) { + found = 1; + break; + } + } + if (found) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe134, "%s", "Scheduling srr work\n"); + schedule_work(&tgt->srr_work); + } else { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe135, "qla_target(%d): imm_srr_id " + "== ctio_srr_id (%d), but there is no " + "corresponding SRR CTIO, deleting IMM " + "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, + imm); + list_del(&imm->srr_list_entry); + + kfree(imm); + + spin_unlock(&tgt->srr_lock); + goto out_reject; + } + } + spin_unlock(&tgt->srr_lock); + } else { + struct qla_tgt_srr_ctio *ts; + + printk(KERN_ERR "qla_target(%d): Unable to allocate SRR IMM " + "entry, SRR request will be rejected\n", vha->vp_idx); + + /* IRQ is already OFF */ + spin_lock(&tgt->srr_lock); + list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, + srr_list_entry) { + if (sctio->srr_id == tgt->imm_srr_id) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe136, "CTIO SRR %p deleted " + "(id %d)\n", sctio, sctio->srr_id); + list_del(&sctio->srr_list_entry); + qla_tgt_send_term_exchange(vha, sctio->cmd, + &sctio->cmd->atio, 1); + kfree(sctio); + } + } + spin_unlock(&tgt->srr_lock); + goto out_reject; + } + + return; + +out_reject: + qla_tgt_send_notify_ack(vha, iocb, 0, 0, 0, + NOTIFY_ACK_SRR_FLAGS_REJECT, + NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, + NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +static void qla_tgt_handle_imm_notify(struct scsi_qla_host *vha, + imm_ntfy_from_isp_t *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, 0xe137, "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 (qla_tgt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) + send_notify_ack = 0; + break; + } + + case IMM_NTFY_LIP_LINK_REINIT: + { + struct qla_tgt *tgt = ha->qla_tgt; + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe139, "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) { + qla_tgt_send_notify_ack(vha, &tgt->link_reinit_iocb, + 0, 0, 0, 0, 0, 0); + } + memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); + tgt->link_reinit_iocb_pending = 1; + /* + * QLogic requires to wait after LINK REINIT for possible + * PDISC or ADISC ELS commands + */ + send_notify_ack = 0; + break; + } + + case IMM_NTFY_PORT_LOGOUT: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe13a, "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 (qla_tgt_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, 0xe13c, "qla_target(%d): Global TPRLO (%x)\n", + vha->vp_idx, status); + if (qla_tgt_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, 0xe13d, "qla_target(%d): Port config changed (%x)\n", + vha->vp_idx, status); + if (qla_tgt_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: + printk(KERN_WARNING "qla_target(%d): Link failure detected\n", + vha->vp_idx); + /* I_T nexus loss */ + if (qla_tgt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) + send_notify_ack = 0; + break; + + case IMM_NTFY_IOCB_OVERFLOW: + printk(KERN_ERR "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, 0xe13e, + "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, (atio_from_isp_t *)iocb), + le16_to_cpu(iocb->u.isp2x.lun)); + if (qla_tgt_abort_task(vha, iocb) == 0) + send_notify_ack = 0; + break; + + case IMM_NTFY_RESOURCE: + printk(KERN_ERR "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, 0xe13f, + "qla_target(%d): Immediate notify task %x\n", + vha->vp_idx, iocb->u.isp2x.task_flags); + if (qla_tgt_handle_task_mgmt(vha, iocb) == 0) + send_notify_ack = 0; + break; + + case IMM_NTFY_ELS: + if (qla_tgt_24xx_handle_els(vha, iocb) == 0) + send_notify_ack = 0; + break; + + case IMM_NTFY_SRR: + qla_tgt_prepare_srr_imm(vha, iocb); + send_notify_ack = 0; + break; + + default: + printk(KERN_ERR "qla_target(%d): Received unknown immediate " + "notify status %x\n", vha->vp_idx, status); + break; + } + + if (send_notify_ack) + qla_tgt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + * This function sends busy to ISP 2xxx or 24xx. + */ +static void qla_tgt_send_busy(struct scsi_qla_host *vha, + atio_from_isp_t *atio, uint16_t status) +{ + ctio7_to_24xx_t *ctio24; + struct qla_hw_data *ha = vha->hw; + request_t *pkt; + struct qla_tgt_sess *sess = NULL; + + sess = ha->tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); + if (!sess) { + qla_tgt_send_term_exchange(vha, NULL, atio, 1); + return; + } + /* Sending marker isn't necessary, since we called from ISR */ + + pkt = (request_t *)qla2x00_req_pkt(vha); + if (!pkt) { + printk(KERN_ERR "qla_target(%d): %s failed: unable to allocate " + "request packet", vha->vp_idx, __func__); + return; + } + + pkt->entry_count = 1; + pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; + + ctio24 = (ctio7_to_24xx_t *)pkt; + ctio24->entry_type = CTIO_TYPE7; + ctio24->nport_handle = sess->loop_id; + ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); + ctio24->vp_index = vha->vp_idx; + ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; + ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; + ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; + ctio24->exchange_addr = atio->u.isp24.exchange_addr; + ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | __constant_cpu_to_le16( + CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | + CTIO7_FLAGS_DONT_RET_CTIO); + /* + * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, + * if the explicit conformation is used. + */ + ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); + ctio24->u.status1.scsi_status = cpu_to_le16(status); + ctio24->u.status1.residual = get_unaligned((uint32_t *) + &atio->u.isp24.fcp_cmnd.add_cdb[atio->u.isp24.fcp_cmnd.add_cdb_len]); + if (ctio24->u.status1.residual != 0) + ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; + + qla2x00_start_iocbs(vha, vha->req); +} + +/* ha->hardware_lock supposed to be held on entry */ +/* called via callback from qla2xxx */ +static void qla_tgt_24xx_atio_pkt(struct scsi_qla_host *vha, atio_from_isp_t *atio) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + int rc; + + if (unlikely(tgt == NULL)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe140, "ATIO pkt, but no tgt (ha %p)", ha); + return; + } + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe209, "qla_target(%d): ATIO pkt %p:" + " type %02x count %02x", vha->vp_idx, atio, atio->u.raw.entry_type, + atio->u.raw.entry_count); + /* + * In tgt_stop mode we also should allow all requests to pass. + * Otherwise, some commands can stuck. + */ + + tgt->irq_cmd_count++; + + switch (atio->u.raw.entry_type) { + case ATIO_TYPE7: + ql_dbg(ql_dbg_tgt, vha, 0xe026, "ATIO_TYPE7 instance %d, lun" + " %Lx, read/write %d/%d, add_cdb_len %d, data_length " + "%04x, s_id %x:%x:%x\n", vha->vp_idx, + atio->u.isp24.fcp_cmnd.lun, + atio->u.isp24.fcp_cmnd.rddata, atio->u.isp24.fcp_cmnd.wrdata, + atio->u.isp24.fcp_cmnd.add_cdb_len, + be32_to_cpu(get_unaligned((uint32_t *) + &atio->u.isp24.fcp_cmnd.add_cdb[atio->u.isp24.fcp_cmnd.add_cdb_len])), + atio->u.isp24.fcp_hdr.s_id[0], atio->u.isp24.fcp_hdr.s_id[1], + atio->u.isp24.fcp_hdr.s_id[2]); + + if (unlikely(atio->u.isp24.exchange_addr == + ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { + printk(KERN_INFO "qla_target(%d): ATIO_TYPE7 " + "received with UNKNOWN exchange address, " + "sending QUEUE_FULL\n", vha->vp_idx); + qla_tgt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); + break; + } + if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) + rc = qla_tgt_handle_cmd_for_atio(vha, atio); + else + rc = qla_tgt_handle_task_mgmt(vha, atio); + if (unlikely(rc != 0)) { + if (rc == -ESRCH) { +#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ + qla_tgt_send_busy(vha, atio, SAM_STAT_BUSY); +#else + qla_tgt_send_term_exchange(vha, NULL, atio, 1); +#endif + } else { + if (tgt->tgt_stop) { + printk(KERN_INFO "qla_target: Unable to send " + "command to target for req, ignoring \n"); + } else { + printk(KERN_INFO "qla_target(%d): Unable to send " + "command to target, sending BUSY status\n", + vha->vp_idx); + qla_tgt_send_busy(vha, atio, SAM_STAT_BUSY); + } + } + } + break; + + case IMMED_NOTIFY_TYPE: + { + if (unlikely(atio->u.isp2x.entry_status != 0)) { + printk(KERN_ERR "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, 0xe027, "%s", "IMMED_NOTIFY ATIO"); + qla_tgt_handle_imm_notify(vha, (imm_ntfy_from_isp_t *)atio); + break; + } + + default: + printk(KERN_ERR "qla_target(%d): Received unknown ATIO atio " + "type %x\n", vha->vp_idx, atio->u.raw.entry_type); + break; + } + + tgt->irq_cmd_count--; +} + +/* ha->hardware_lock supposed to be held on entry */ +/* called via callback from qla2xxx */ +static void qla_tgt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + + if (unlikely(tgt == NULL)) { + printk(KERN_ERR "qla_target(%d): Response pkt %x received, but no " + "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); + return; + } + + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe20a, "qla_target(%d): response pkt %p: T %02x" + " C %02x S %02x handle %#x\n", vha->vp_idx, pkt, pkt->entry_type, + pkt->entry_count, pkt->entry_status, pkt->handle); + + /* + * In tgt_stop mode we also should allow all requests to pass. + * Otherwise, some commands can stuck. + */ + + tgt->irq_cmd_count++; + + switch (pkt->entry_type) { + case CTIO_TYPE7: + { + ctio7_from_24xx_t *entry = (ctio7_from_24xx_t *)pkt; + ql_dbg(ql_dbg_tgt, vha, 0xe028, "CTIO_TYPE7: instance %d\n", vha->vp_idx); + qla_tgt_do_ctio_completion(vha, entry->handle, + le16_to_cpu(entry->status)|(pkt->entry_status << 16), + entry); + break; + } + + case ACCEPT_TGT_IO_TYPE: + { + atio_from_isp_t *atio = (atio_from_isp_t *)pkt; + int rc; + ql_dbg(ql_dbg_tgt, vha, 0xe029, "ACCEPT_TGT_IO instance %d status %04x " + "lun %04x read/write %d data_length %04x " + "target_id %02x rx_id %04x\n ", + vha->vp_idx, le16_to_cpu(atio->u.isp2x.status), + le16_to_cpu(atio->u.isp2x.lun), + atio->u.isp2x.execution_codes, + le32_to_cpu(atio->u.isp2x.data_length), + GET_TARGET_ID(ha, atio), atio->u.isp2x.rx_id); + if (atio->u.isp2x.status != __constant_cpu_to_le16(ATIO_CDB_VALID)) { + printk(KERN_ERR "qla_target(%d): ATIO with error " + "status %x received\n", vha->vp_idx, + le16_to_cpu(atio->u.isp2x.status)); + break; + } + ql_dbg(ql_dbg_tgt_pkt, vha, 0xe20b, "FCP CDB: 0x%02x, sizeof(cdb): %lu", + atio->u.isp2x.cdb[0], (unsigned long int)sizeof(atio->u.isp2x.cdb)); + + rc = qla_tgt_handle_cmd_for_atio(vha, atio); + if (unlikely(rc != 0)) { + if (rc == -ESRCH) { +#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ + qla_tgt_send_busy(vha, atio, 0); +#else + qla_tgt_send_term_exchange(vha, NULL, atio, 1); +#endif + } else { + if (tgt->tgt_stop) { + printk(KERN_INFO "qla_target: Unable to send " + "command to target, sending TERM EXCHANGE" + " for rsp\n"); + qla_tgt_send_term_exchange(vha, NULL, + atio, 1); + } else { + printk(KERN_INFO "qla_target(%d): Unable to send " + "command to target, sending BUSY status\n", + vha->vp_idx); + qla_tgt_send_busy(vha, atio, 0); + } + } + } + } + break; + + case CONTINUE_TGT_IO_TYPE: + { + ctio_to_2xxx_t *entry = (ctio_to_2xxx_t *)pkt; + ql_dbg(ql_dbg_tgt, vha, 0xe02a, "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx); + qla_tgt_do_ctio_completion(vha, entry->handle, + le16_to_cpu(entry->status)|(pkt->entry_status << 16), + entry); + break; + } + + case CTIO_A64_TYPE: + { + ctio_to_2xxx_t *entry = (ctio_to_2xxx_t *)pkt; + ql_dbg(ql_dbg_tgt, vha, 0xe02b, "CTIO_A64: instance %d\n", vha->vp_idx); + qla_tgt_do_ctio_completion(vha, entry->handle, + le16_to_cpu(entry->status)|(pkt->entry_status << 16), + entry); + break; + } + + case IMMED_NOTIFY_TYPE: + ql_dbg(ql_dbg_tgt, vha, 0xe02c, "%s", "IMMED_NOTIFY\n"); + qla_tgt_handle_imm_notify(vha, (imm_ntfy_from_isp_t *)pkt); + break; + + case NOTIFY_ACK_TYPE: + if (tgt->notify_ack_expected > 0) { + nack_to_isp_t *entry = (nack_to_isp_t *)pkt; + ql_dbg(ql_dbg_tgt, vha, 0xe02d, "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 != + __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { + printk(KERN_ERR "qla_target(%d): NOTIFY_ACK " + "failed %x\n", vha->vp_idx, + le16_to_cpu(entry->u.isp2x.status)); + } + } else { + printk(KERN_ERR "qla_target(%d): Unexpected NOTIFY_ACK " + "received\n", vha->vp_idx); + } + break; + + case ABTS_RECV_24XX: + ql_dbg(ql_dbg_tgt, vha, 0xe02e, "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); + qla_tgt_24xx_handle_abts(vha, (abts_recv_from_24xx_t *)pkt); + break; + + case ABTS_RESP_24XX: + if (tgt->abts_resp_expected > 0) { + abts_resp_from_24xx_fw_t *entry = + (abts_resp_from_24xx_fw_t *)pkt; + ql_dbg(ql_dbg_tgt, vha, 0xe02f, "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. + */ + qla_tgt_24xx_retry_term_exchange(vha, entry); + } else + printk(KERN_ERR "qla_target(%d): ABTS_RESP_24XX " + "failed %x (subcode %x:%x)", vha->vp_idx, + entry->compl_status, entry->error_subcode1, + entry->error_subcode2); + } + } else { + printk(KERN_ERR "qla_target(%d): Unexpected ABTS_RESP_24XX " + "received\n", vha->vp_idx); + } + break; + + default: + printk(KERN_ERR "qla_target(%d): Received unknown response pkt " + "type %x\n", vha->vp_idx, pkt->entry_type); + break; + } + + tgt->irq_cmd_count--; +} + +/* + * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire + */ +void qla_tgt_async_event(uint16_t code, struct scsi_qla_host *vha, uint16_t *mailbox) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + int reason_code; + + ql_dbg(ql_dbg_tgt, vha, 0xe034, "scsi(%ld): ha state %d init_done %d" + " oper_mode %d topo %d\n", vha->host_no, atomic_read(&vha->loop_state), + vha->flags.init_done, ha->operating_mode, ha->current_topology); + + if (!ha->tgt_ops) + return; + + if (unlikely(tgt == NULL)) { + ql_dbg(ql_dbg_tgt, vha, 0xe035, "ASYNC EVENT %#x, but no tgt" + " (ha %p)", code, ha); + return; + } + + if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && + IS_QLA2100(ha)) + return; + /* + * In tgt_stop mode we also should allow all requests to pass. + * Otherwise, some commands can stuck. + */ + + tgt->irq_cmd_count++; + + switch (code) { + case MBA_RESET: /* Reset */ + case MBA_SYSTEM_ERR: /* System Error */ + case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ + case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ + case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe141, "qla_target(%d): System error async event %#x " + "occured", vha->vp_idx, code); + break; + + case MBA_LOOP_UP: + { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe142, "qla_target(%d): Async LOOP_UP occured " + "(m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", vha->vp_idx, + le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), + le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4])); + if (tgt->link_reinit_iocb_pending) { + qla_tgt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, + 0, 0, 0, 0, 0, 0); + tgt->link_reinit_iocb_pending = 0; + } + break; + } + + case MBA_LIP_OCCURRED: + case MBA_LOOP_DOWN: + case MBA_LIP_RESET: + case MBA_RSCN_UPDATE: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe143, "qla_target(%d): Async event %#x occured " + "(m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", vha->vp_idx, + code, le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), + le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4])); + break; + + case MBA_PORT_UPDATE: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe144, "qla_target(%d): Port update async event %#x " + "occured: updating the ports database (m[1]=%x, m[2]=%x, " + "m[3]=%x, m[4]=%x)", vha->vp_idx, code, + le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), + le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4])); + reason_code = le16_to_cpu(mailbox[2]); + if (reason_code == 0x4) + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe145, "Async MB 2: Got PLOGI Complete\n"); + else if (reason_code == 0x7) + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe146, "Async MB 2: Port Logged Out\n"); + break; + + default: + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe147, "qla_target(%d): Async event %#x occured: " + "ignore (m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", + vha->vp_idx, code, + le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]), + le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4])); + break; + } + + tgt->irq_cmd_count--; +} + +static fc_port_t *qla_tgt_get_port_database(struct scsi_qla_host *vha, + uint16_t loop_id) +{ + fc_port_t *fcport; + int rc; + + fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); + if (!fcport) { + printk(KERN_ERR "qla_target(%d): Allocation of tmp FC port failed", + vha->vp_idx); + return NULL; + } + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe148, "loop_id %d", loop_id); + + fcport->loop_id = loop_id; + + rc = qla2x00_get_port_database(vha, fcport, 0); + if (rc != QLA_SUCCESS) { + printk(KERN_ERR "qla_target(%d): Failed to retrieve fcport " + "information -- get_port_database() returned %x " + "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); + kfree(fcport); + return NULL; + } + + return fcport; +} + +/* Must be called under tgt_mutex */ +static struct qla_tgt_sess *qla_tgt_make_local_sess(struct scsi_qla_host *vha, + uint8_t *s_id) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess = NULL; + fc_port_t *fcport = NULL; + int rc, global_resets; + uint16_t loop_id = 0; + +retry: + global_resets = atomic_read(&ha->qla_tgt->tgt_global_resets_count); + + rc = qla24xx_get_loop_id(vha, s_id, &loop_id); + if (rc != 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, 0xe149, "Unable to find" + " initiator with S_ID %x:%x:%x", s_id[0], + s_id[1], s_id[2]); + } else + printk(KERN_ERR "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]); + return NULL; + } + + fcport = qla_tgt_get_port_database(vha, loop_id); + if (!fcport) + return NULL; + + if (global_resets != atomic_read(&ha->qla_tgt->tgt_global_resets_count)) { + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe14a, "qla_target(%d): global reset" + " during session discovery (counter was %d, new %d)," + " retrying", vha->vp_idx, global_resets, + atomic_read(&ha->qla_tgt->tgt_global_resets_count)); + goto retry; + } + + sess = qla_tgt_create_sess(vha, fcport, true); + + kfree(fcport); + return sess; +} + +static void qla_tgt_abort_work(struct qla_tgt *tgt, + struct qla_tgt_sess_work_param *prm) +{ + struct scsi_qla_host *vha = tgt->vha; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess = NULL; + unsigned long flags; + uint32_t be_s_id; + uint8_t s_id[3]; + int rc; + + spin_lock_irqsave(&ha->hardware_lock, flags); + + if (tgt->tgt_stop) + goto out_term; + + 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_ops->find_sess_by_s_id(vha, + (unsigned char *)&be_s_id); + if (!sess) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + mutex_lock(&ha->tgt_mutex); + sess = qla_tgt_make_local_sess(vha, s_id); + /* sess has got an extra creation ref */ + mutex_unlock(&ha->tgt_mutex); + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (!sess) + goto out_term; + } else { + kref_get(&sess->se_sess->sess_kref); + } + + if (tgt->tgt_stop) + goto out_term; + + rc = __qla_tgt_24xx_handle_abts(vha, &prm->abts, sess); + if (rc != 0) + goto out_term; + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + ha->tgt_ops->put_sess(sess); + return; + +out_term: + qla_tgt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (sess) + ha->tgt_ops->put_sess(sess); +} + +static void qla_tgt_tmr_work(struct qla_tgt *tgt, + struct qla_tgt_sess_work_param *prm) +{ + atio_from_isp_t *a = &prm->tm_iocb2; + struct scsi_qla_host *vha = tgt->vha; + struct qla_hw_data *ha = vha->hw; + struct qla_tgt_sess *sess = NULL; + unsigned long flags; + uint8_t *s_id = NULL; /* to hide compiler warnings */ + int rc; + uint32_t lun, unpacked_lun; + int lun_size, fn; + void *iocb; + + spin_lock_irqsave(&ha->hardware_lock, flags); + + if (tgt->tgt_stop) + goto out_term; + + s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; + sess = ha->tgt_ops->find_sess_by_s_id(vha, s_id); + if (!sess) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + mutex_lock(&ha->tgt_mutex); + sess = qla_tgt_make_local_sess(vha, s_id); + /* sess has got an extra creation ref */ + mutex_unlock(&ha->tgt_mutex); + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (!sess) + goto out_term; + } else { + kref_get(&sess->se_sess->sess_kref); + } + + iocb = a; + lun = a->u.isp24.fcp_cmnd.lun; + lun_size = sizeof(lun); + fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; + unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); + + rc = qla_tgt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); + if (rc != 0) + goto out_term; + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + ha->tgt_ops->put_sess(sess); + return; + +out_term: + qla_tgt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + if (sess) + ha->tgt_ops->put_sess(sess); +} + +static void qla_tgt_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; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + + ql_dbg(ql_dbg_tgt_mgt, vha, 0xe14e, "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: + qla_tgt_abort_work(tgt, prm); + break; + case QLA_TGT_SESS_WORK_TM: + qla_tgt_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); + + spin_lock_irqsave(&ha->hardware_lock, flags); + spin_lock(&tgt->sess_work_lock); + if (list_empty(&tgt->sess_works_list)) { + tgt->sess_works_pending = 0; + tgt->tm_to_unknown = 0; + } + spin_unlock(&tgt->sess_work_lock); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + +/* Must be called under tgt_host_action_mutex */ +int qla_tgt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) +{ + struct qla_tgt *tgt; + + if (ql2x_ini_mode == QLA2XXX_INI_MODE_ENABLED) + return 0; + + ql_dbg(ql_dbg_tgt, base_vha, 0xe036, "Registering target for host %ld(%p)", + base_vha->host_no, ha); + + BUG_ON((ha->qla_tgt != NULL) || (ha->tgt_ops != NULL)); + + tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); + if (!tgt) { + printk(KERN_ERR "Unable to allocate struct qla_tgt\n"); + return -ENOMEM; + } + + if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) + base_vha->host->hostt->supported_mode |= MODE_TARGET; + + tgt->ha = ha; + tgt->vha = base_vha; + init_waitqueue_head(&tgt->waitQ); + INIT_LIST_HEAD(&tgt->sess_list); + INIT_LIST_HEAD(&tgt->del_sess_list); + INIT_DELAYED_WORK(&tgt->sess_del_work, + (void (*)(struct work_struct *))qla_tgt_del_sess_work_fn); + spin_lock_init(&tgt->sess_work_lock); + INIT_WORK(&tgt->sess_work, qla_tgt_sess_work_fn); + INIT_LIST_HEAD(&tgt->sess_works_list); + spin_lock_init(&tgt->srr_lock); + INIT_LIST_HEAD(&tgt->srr_ctio_list); + INIT_LIST_HEAD(&tgt->srr_imm_list); + INIT_WORK(&tgt->srr_work, qla_tgt_handle_srr_work); + atomic_set(&tgt->tgt_global_resets_count, 0); + + ha->qla_tgt = tgt; + + printk(KERN_INFO "qla_target(%d): using 64 Bit PCI " + "addressing", base_vha->vp_idx); + tgt->tgt_enable_64bit_addr = 1; + /* 3 is reserved */ + tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); + tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; + tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; + + mutex_lock(&qla_tgt_mutex); + list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); + mutex_unlock(&qla_tgt_mutex); + + return 0; +} + +/* Must be called under tgt_host_action_mutex */ +int qla_tgt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) +{ + if (!ha->qla_tgt) + return 0; + + mutex_lock(&qla_tgt_mutex); + list_del(&ha->qla_tgt->tgt_list_entry); + mutex_unlock(&qla_tgt_mutex); + + ql_dbg(ql_dbg_tgt, vha, 0xe037, "Unregistering target for host %ld(%p)", + vha->host_no, ha); + qla_tgt_release(ha->qla_tgt); + + return 0; +} + +static void qla_tgt_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 < 8; i++) + pr_debug("%02x ", vha->node_name[i]); + pr_debug("\n"); + pr_debug("qla2xxx HW vha->port_name: "); + for (i = 0; i < 8; 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 < 8; i++) + pr_debug("%02x ", b[i]); + pr_debug("\n"); +} + +/** + * qla_tgt_lport_register - register lport with external module + * + * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops + * @wwpn: Passwd FC target WWPN + * @callback: lport initialization callback for tcm_qla2xxx code + * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data + */ +int qla_tgt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn, + int (*callback)(struct scsi_qla_host *), + void *target_lport_ptr) +{ + 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[8]; + + 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 (ha->tgt_ops != NULL) + continue; + + if (!(host->hostt->supported_mode & MODE_TARGET)) + continue; + + spin_lock_irqsave(&ha->hardware_lock, flags); + if (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; + } + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + if (!scsi_host_get(host)) { + pr_err("Unable to scsi_host_get() for" + " qla2xxx scsi_host\n"); + continue; + } + qla_tgt_lport_dump(vha, wwpn, b); + + if (memcmp(vha->port_name, b, 8)) { + scsi_host_put(host); + continue; + } + /* + * Setup passed parameters ahead of invoking callback + */ + ha->tgt_ops = qla_tgt_ops; + ha->target_lport_ptr = target_lport_ptr; + rc = (*callback)(vha); + if (rc != 0) { + ha->tgt_ops = NULL; + ha->target_lport_ptr = NULL; + } + mutex_unlock(&qla_tgt_mutex); + return rc; + } + mutex_unlock(&qla_tgt_mutex); + + return -ENODEV; +} +EXPORT_SYMBOL(qla_tgt_lport_register); + +/** + * qla_tgt_lport_deregister - Degister lport + * + * @vha: Registered scsi_qla_host pointer + */ +void qla_tgt_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 + */ + ha->target_lport_ptr = NULL; + ha->tgt_ops = NULL; + /* + * Release the Scsi_Host reference for the underlying qla2xxx host + */ + scsi_host_put(sh); +} +EXPORT_SYMBOL(qla_tgt_lport_deregister); + +/* Must be called under HW lock */ +void qla_tgt_set_mode(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + + switch (ql2x_ini_mode) { + case QLA2XXX_INI_MODE_DISABLED: + case QLA2XXX_INI_MODE_EXCLUSIVE: + vha->host->active_mode = MODE_TARGET; + break; + case QLA2XXX_INI_MODE_ENABLED: + vha->host->active_mode |= MODE_TARGET; + break; + default: + break; + } + + if (ha->ini_mode_force_reverse) + qla_reverse_ini_mode(vha); +} + +/* Must be called under HW lock */ +void qla_tgt_clear_mode(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + + switch (ql2x_ini_mode) { + case QLA2XXX_INI_MODE_DISABLED: + vha->host->active_mode = MODE_UNKNOWN; + break; + case QLA2XXX_INI_MODE_EXCLUSIVE: + vha->host->active_mode = MODE_INITIATOR; + break; + case QLA2XXX_INI_MODE_ENABLED: + vha->host->active_mode &= ~MODE_TARGET; + break; + default: + break; + } + + if (ha->ini_mode_force_reverse) + qla_reverse_ini_mode(vha); +} + +/* + * qla_tgt_enable_vha - NO LOCK HELD + * + * host_reset, bring up w/ Target Mode Enabled + */ +void +qla_tgt_enable_vha(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + unsigned long flags; + + if (!tgt) { + printk(KERN_ERR "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; + qla_tgt_set_mode(vha); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); + qla2xxx_wake_dpc(vha); + qla2x00_wait_for_hba_online(vha); +} +EXPORT_SYMBOL(qla_tgt_enable_vha); + +/* + * qla_tgt_disable_vha - NO LOCK HELD + * + * Disable Target Mode and reset the adapter + */ +void +qla_tgt_disable_vha(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + struct qla_tgt *tgt = ha->qla_tgt; + unsigned long flags; + + if (!tgt) { + printk(KERN_ERR "Unable to locate qla_tgt pointer from" + " struct qla_hw_data\n"); + dump_stack(); + return; + } + + spin_lock_irqsave(&ha->hardware_lock, flags); + qla_tgt_clear_mode(vha); + spin_unlock_irqrestore(&ha->hardware_lock, flags); + + set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); + qla2xxx_wake_dpc(vha); + qla2x00_wait_for_hba_online(vha); +} + +/* + * 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 +qla_tgt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) +{ + mutex_init(&ha->tgt_mutex); + mutex_init(&ha->tgt_host_action_mutex); + qla_tgt_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->atio_q_length = ATIO_ENTRY_CNT_24XX; +} + +void +qla_tgt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) +{ + /* + * FC-4 Feature bit 0 indicates target functionality to the name server. + */ + if (qla_tgt_mode_enabled(vha)) { + if (qla_ini_mode_enabled(vha)) + ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; + else + ct_req->req.rff_id.fc4_feature = BIT_0; + } else if (qla_ini_mode_enabled(vha)) { + ct_req->req.rff_id.fc4_feature = BIT_1; + } +} + +/* + * qla_tgt_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 +qla_tgt_init_atio_q_entries(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + uint16_t cnt; + atio_from_isp_t *pkt = (atio_from_isp_t *)ha->atio_ring; + + for (cnt = 0; cnt < ha->atio_q_length; cnt++) { + pkt->u.raw.signature = ATIO_PROCESSED; + pkt++; + } + +} + +/* + * qla_tgt_24xx_process_atio_queue() - Process ATIO queue entries. + * @ha: SCSI driver HA context + */ +void +qla_tgt_24xx_process_atio_queue(struct scsi_qla_host *vha) +{ + struct qla_hw_data *ha = vha->hw; + struct device_reg_24xx __iomem *reg = &ha->iobase->isp24; + atio_from_isp_t *pkt; + int cnt, i; + + if (!vha->flags.online) + return; + + while (ha->atio_ring_ptr->signature != ATIO_PROCESSED) { + pkt = (atio_from_isp_t *)ha->atio_ring_ptr; + cnt = pkt->u.raw.entry_count; + + qla_tgt_24xx_atio_pkt_all_vps(vha, (atio_from_isp_t *)pkt); + + for (i = 0; i < cnt; i++) { + ha->atio_ring_index++; + if (ha->atio_ring_index == ha->atio_q_length) { + ha->atio_ring_index = 0; + ha->atio_ring_ptr = ha->atio_ring; + } else + ha->atio_ring_ptr++; + + pkt->u.raw.signature = ATIO_PROCESSED; + pkt = (atio_from_isp_t *)ha->atio_ring_ptr; + } + wmb(); + } + + /* Adjust ring index */ + WRT_REG_DWORD(®->atio_q_out, ha->atio_ring_index); +} + +void +qla_tgt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg) +{ + struct qla_hw_data *ha = vha->hw; + +/* FIXME: atio_q in/out for ha->mqenable=1..? */ + if (ha->mqenable) { +#if 0 + WRT_REG_DWORD(®->isp25mq.atio_q_in, 0); + WRT_REG_DWORD(®->isp25mq.atio_q_out, 0); + RD_REG_DWORD(®->isp25mq.atio_q_out); +#endif + } else { + /* Setup APTIO registers for target mode */ + WRT_REG_DWORD(®->isp24.atio_q_in, 0); + WRT_REG_DWORD(®->isp24.atio_q_out, 0); + RD_REG_DWORD(®->isp24.atio_q_out); + } +} + +void +qla_tgt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) +{ + struct qla_hw_data *ha = vha->hw; + + if (qla_tgt_mode_enabled(vha)) { + if (!ha->saved_set) { + /* We save only once */ + ha->saved_exchange_count = nv->exchange_count; + ha->saved_firmware_options_1 = nv->firmware_options_1; + ha->saved_firmware_options_2 = nv->firmware_options_2; + ha->saved_firmware_options_3 = nv->firmware_options_3; + ha->saved_set = 1; + } + + nv->exchange_count = __constant_cpu_to_le16(0xFFFF); + + /* Enable target mode */ + nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); + + /* Disable ini mode, if requested */ + if (!qla_ini_mode_enabled(vha)) + nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); + + /* Disable Full Login after LIP */ + nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); + /* Enable initial LIP */ + nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); + /* Enable FC tapes support */ + nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12); + /* Disable Full Login after LIP */ + nv->host_p &= __constant_cpu_to_le32(~BIT_10); + /* Enable target PRLI control */ + nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); + } else { + if (ha->saved_set) { + nv->exchange_count = ha->saved_exchange_count; + nv->firmware_options_1 = ha->saved_firmware_options_1; + nv->firmware_options_2 = ha->saved_firmware_options_2; + nv->firmware_options_3 = ha->saved_firmware_options_3; + } + } + + /* out-of-order frames reassembly */ + nv->firmware_options_3 |= BIT_6|BIT_9; + + if (ha->enable_class_2) { + if (vha->flags.init_done) + fc_host_supported_classes(vha->host) = + FC_COS_CLASS2 | FC_COS_CLASS3; + + nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); + } else { + if (vha->flags.init_done) + fc_host_supported_classes(vha->host) = FC_COS_CLASS3; + + nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); + } +} + +void +qla_tgt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, struct init_cb_24xx *icb) +{ + struct qla_hw_data *ha = vha->hw; + + if (ha->node_name_set) { + memcpy(icb->node_name, ha->tgt_node_name, WWN_SIZE); + icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); + } +} + +int +qla_tgt_24xx_process_response_error(struct scsi_qla_host *vha, struct sts_entry_24xx *pkt) +{ + switch (pkt->entry_type) { + case ABTS_RECV_24XX: + case ABTS_RESP_24XX: + case CTIO_TYPE7: + case NOTIFY_ACK_TYPE: + return 1; + default: + return 0; + } +} + +void +qla_tgt_modify_vp_config(struct scsi_qla_host *vha, struct vp_config_entry_24xx *vpmod) +{ + if (qla_tgt_mode_enabled(vha)) + vpmod->options_idx1 &= ~BIT_5; + /* Disable ini mode, if requested */ + if (!qla_ini_mode_enabled(vha)) + vpmod->options_idx1 &= ~BIT_4; +} + +void +qla_tgt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) +{ + mutex_init(&ha->tgt_mutex); + mutex_init(&ha->tgt_host_action_mutex); + qla_tgt_clear_mode(base_vha); +} + +int +qla_tgt_mem_alloc(struct qla_hw_data *ha) +{ + ha->tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * + MAX_MULTI_ID_FABRIC, GFP_KERNEL); + if (!ha->tgt_vp_map) + return -ENOMEM; + + ha->atio_ring = dma_alloc_coherent(&ha->pdev->dev, + (ha->atio_q_length + 1) * sizeof(atio_from_isp_t), + &ha->atio_dma, GFP_KERNEL); + if (!ha->atio_ring) { + kfree(ha->tgt_vp_map); + return -ENOMEM; + } + return 0; +} + +void +qla_tgt_mem_free(struct qla_hw_data *ha) +{ + if (ha->atio_ring) { + dma_free_coherent(&ha->pdev->dev, (ha->atio_q_length + 1) * + sizeof(atio_from_isp_t), ha->atio_ring, ha->atio_dma); + } + kfree(ha->tgt_vp_map); +} + +static int __init qla_tgt_parse_ini_mode(void) +{ + if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) + ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; + else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) + ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; + else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) + ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; + else + return false; + + return true; +} + +int __init qla_tgt_init(void) +{ + int ret; + + if (!qla_tgt_parse_ini_mode()) { + printk(KERN_ERR "qla_tgt_parse_ini_mode() failed\n"); + return -EINVAL; + } + + qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep", + sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), + 0, NULL); + if (!qla_tgt_cmd_cachep) { + printk(KERN_ERR "kmem_cache_create for qla_tgt_cmd_cachep failed\n"); + return -ENOMEM; + } + + 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) { + pr_warn(KERN_ERR "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); + ret = -ENOMEM; + goto out; + } + + 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) { + pr_warn(KERN_ERR "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); + ret = -ENOMEM; + goto out_mgmt_cmd_cachep; + } + + qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); + if (!qla_tgt_wq) { + pr_warn(KERN_ERR "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_mgmt_cmd_cachep: + kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); +out: + kmem_cache_destroy(qla_tgt_cmd_cachep); + return ret; +} + +void qla_tgt_exit(void) +{ + destroy_workqueue(qla_tgt_wq); + mempool_destroy(qla_tgt_mgmt_cmd_mempool); + kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); + kmem_cache_destroy(qla_tgt_cmd_cachep); +} diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h new file mode 100644 index 000000000000..b9d0aa16f945 --- /dev/null +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -0,0 +1,986 @@ +/* + * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin + * Copyright (C) 2004 - 2005 Leonid Stoljar + * Copyright (C) 2006 Nathaniel Clark + * Copyright (C) 2007 - 2010 ID7 Ltd. + * + * Forward port and refactoring to modern qla2xxx and target/configfs + * + * Copyright (C) 2010-2011 Nicholas A. Bellinger + * + * Additional file for the target driver support. + * + * 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; either version 2 + * of the License, or (at your option) any later version. + * + * 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. + */ +/* + * This is the global def file that is useful for including from the + * target portion. + */ + +#ifndef __QLA_TARGET_H +#define __QLA_TARGET_H + +#include "qla_def.h" + +/* + * Must be changed on any change in any initiator visible interfaces or + * data in the target add-on + */ +#define QLA2XXX_TARGET_MAGIC 269 + +/* + * Must be changed on any change in any target visible interfaces or + * data in the initiator + */ +#define QLA2XXX_INITIATOR_MAGIC 57222 + +#define QLA2XXX_INI_MODE_STR_EXCLUSIVE "exclusive" +#define QLA2XXX_INI_MODE_STR_DISABLED "disabled" +#define QLA2XXX_INI_MODE_STR_ENABLED "enabled" + +#define QLA2XXX_INI_MODE_EXCLUSIVE 0 +#define QLA2XXX_INI_MODE_DISABLED 1 +#define QLA2XXX_INI_MODE_ENABLED 2 + +#define QLA2XXX_COMMAND_COUNT_INIT 250 +#define QLA2XXX_IMMED_NOTIFY_COUNT_INIT 250 + +/* + * Used to mark which completion handles (for RIO Status's) are for CTIO's + * vs. regular (non-target) info. This is checked for in + * qla2x00_process_response_queue() to see if a handle coming back in a + * multi-complete should come to the tgt driver or be handled there by qla2xxx + */ +#define CTIO_COMPLETION_HANDLE_MARK BIT_29 +#if (CTIO_COMPLETION_HANDLE_MARK <= MAX_OUTSTANDING_COMMANDS) +#error "Hackish CTIO_COMPLETION_HANDLE_MARK no longer larger than MAX_OUTSTANDING_COMMANDS" +#endif +#define HANDLE_IS_CTIO_COMP(h) (h & CTIO_COMPLETION_HANDLE_MARK) + +/* Used to mark CTIO as intermediate */ +#define CTIO_INTERMEDIATE_HANDLE_MARK BIT_30 + +#ifndef OF_SS_MODE_0 +/* + * ISP target entries - Flags bit definitions. + */ +#define OF_SS_MODE_0 0 +#define OF_SS_MODE_1 1 +#define OF_SS_MODE_2 2 +#define OF_SS_MODE_3 3 + +#define OF_EXPL_CONF BIT_5 /* Explicit Confirmation Requested */ +#define OF_DATA_IN BIT_6 /* Data in to initiator */ + /* (data from target to initiator) */ +#define OF_DATA_OUT BIT_7 /* Data out from initiator */ + /* (data from initiator to target) */ +#define OF_NO_DATA (BIT_7 | BIT_6) +#define OF_INC_RC BIT_8 /* Increment command resource count */ +#define OF_FAST_POST BIT_9 /* Enable mailbox fast posting. */ +#define OF_CONF_REQ BIT_13 /* Confirmation Requested */ +#define OF_TERM_EXCH BIT_14 /* Terminate exchange */ +#define OF_SSTS BIT_15 /* Send SCSI status */ +#endif + +#ifndef QLA_TGT_DATASEGS_PER_CMD32 +#define QLA_TGT_DATASEGS_PER_CMD32 3 +#define QLA_TGT_DATASEGS_PER_CONT32 7 +#define QLA_TGT_MAX_SG32(ql) \ + (((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD32 + QLA_TGT_DATASEGS_PER_CONT32*((ql) - 1)) : 0) + +#define QLA_TGT_DATASEGS_PER_CMD64 2 +#define QLA_TGT_DATASEGS_PER_CONT64 5 +#define QLA_TGT_MAX_SG64(ql) \ + (((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD64 + QLA_TGT_DATASEGS_PER_CONT64*((ql) - 1)) : 0) +#endif + +#ifndef QLA_TGT_DATASEGS_PER_CMD_24XX +#define QLA_TGT_DATASEGS_PER_CMD_24XX 1 +#define QLA_TGT_DATASEGS_PER_CONT_24XX 5 +#define QLA_TGT_MAX_SG_24XX(ql) \ + (min(1270, ((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD_24XX + QLA_TGT_DATASEGS_PER_CONT_24XX*((ql) - 1)) : 0)) +#endif +#endif + +#define GET_TARGET_ID(ha, iocb) ((HAS_EXTENDED_IDS(ha)) \ + ? le16_to_cpu((iocb)->u.isp2x.target.extended) \ + : (uint16_t)(iocb)->u.isp2x.target.id.standard) + +#ifndef IMMED_NOTIFY_TYPE +#define IMMED_NOTIFY_TYPE 0x0D /* Immediate notify entry. */ +/* + * ISP queue - immediate notify entry structure definition. + * This is sent by the ISP to the Target driver. + * This IOCB would have report of events sent by the + * initiator, that needs to be handled by the target + * driver immediately. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + union { + struct { + uint32_t sys_define_2; /* System defined. */ + target_id_t target; + uint16_t lun; + uint8_t target_id; + uint8_t reserved_1; + uint16_t status_modifier; + uint16_t status; + uint16_t task_flags; + uint16_t seq_id; + uint16_t srr_rx_id; + uint32_t srr_rel_offs; + uint16_t srr_ui; +#define SRR_IU_DATA_IN 0x1 +#define SRR_IU_DATA_OUT 0x5 +#define SRR_IU_STATUS 0x7 + uint16_t srr_ox_id; + uint8_t reserved_2[28]; + } isp2x; + struct { + uint32_t reserved; + uint16_t nport_handle; + uint16_t reserved_2; + uint16_t flags; +#define NOTIFY24XX_FLAGS_GLOBAL_TPRLO BIT_1 +#define NOTIFY24XX_FLAGS_PUREX_IOCB BIT_0 + uint16_t srr_rx_id; + uint16_t status; + uint8_t status_subcode; + uint8_t reserved_3; + uint32_t exchange_address; + uint32_t srr_rel_offs; + uint16_t srr_ui; + uint16_t srr_ox_id; + uint8_t reserved_4[19]; + uint8_t vp_index; + uint32_t reserved_5; + uint8_t port_id[3]; + uint8_t reserved_6; + } isp24; + } u; + uint16_t reserved_7; + uint16_t ox_id; +} __attribute__((packed)) imm_ntfy_from_isp_t; +#endif + +#ifndef NOTIFY_ACK_TYPE +#define NOTIFY_ACK_TYPE 0x0E /* Notify acknowledge entry. */ +/* + * ISP queue - notify acknowledge entry structure definition. + * This is sent to the ISP from the target driver. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + union { + struct { + uint32_t sys_define_2; /* System defined. */ + target_id_t target; + uint8_t target_id; + uint8_t reserved_1; + uint16_t flags; + uint16_t resp_code; + uint16_t status; + uint16_t task_flags; + uint16_t seq_id; + uint16_t srr_rx_id; + uint32_t srr_rel_offs; + uint16_t srr_ui; + uint16_t srr_flags; + uint16_t srr_reject_code; + uint8_t srr_reject_vendor_uniq; + uint8_t srr_reject_code_expl; + uint8_t reserved_2[24]; + } isp2x; + struct { + uint32_t handle; + uint16_t nport_handle; + uint16_t reserved_1; + uint16_t flags; + uint16_t srr_rx_id; + uint16_t status; + uint8_t status_subcode; + uint8_t reserved_3; + uint32_t exchange_address; + uint32_t srr_rel_offs; + uint16_t srr_ui; + uint16_t srr_flags; + uint8_t reserved_4[19]; + uint8_t vp_index; + uint8_t srr_reject_vendor_uniq; + uint8_t srr_reject_code_expl; + uint8_t srr_reject_code; + uint8_t reserved_5[5]; + } isp24; + } u; + uint8_t reserved[2]; + uint16_t ox_id; +} __attribute__((packed)) nack_to_isp_t; +#define NOTIFY_ACK_SRR_FLAGS_ACCEPT 0 +#define NOTIFY_ACK_SRR_FLAGS_REJECT 1 + +#define NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM 0x9 + +#define NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL 0 +#define NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_UNABLE_TO_SUPPLY_DATA 0x2a + +#define NOTIFY_ACK_SUCCESS 0x01 +#endif + +#ifndef ACCEPT_TGT_IO_TYPE +#define ACCEPT_TGT_IO_TYPE 0x16 /* Accept target I/O entry. */ +#endif + +#ifndef CONTINUE_TGT_IO_TYPE +#define CONTINUE_TGT_IO_TYPE 0x17 +/* + * ISP queue - Continue Target I/O (CTIO) entry for status mode 0 structure. + * This structure is sent to the ISP 2xxx from target driver. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t handle; /* System defined handle */ + target_id_t target; + uint16_t rx_id; + uint16_t flags; + uint16_t status; + uint16_t timeout; /* 0 = 30 seconds, 0xFFFF = disable */ + uint16_t dseg_count; /* Data segment count. */ + uint32_t relative_offset; + uint32_t residual; + uint16_t reserved_1[3]; + uint16_t scsi_status; + uint32_t transfer_length; + uint32_t dseg_0_address; /* Data segment 0 address. */ + uint32_t dseg_0_length; /* Data segment 0 length. */ + uint32_t dseg_1_address; /* Data segment 1 address. */ + uint32_t dseg_1_length; /* Data segment 1 length. */ + uint32_t dseg_2_address; /* Data segment 2 address. */ + uint32_t dseg_2_length; /* Data segment 2 length. */ +} __attribute__((packed)) ctio_to_2xxx_t; +#define ATIO_PATH_INVALID 0x07 +#define ATIO_CANT_PROV_CAP 0x16 +#define ATIO_CDB_VALID 0x3D + +#define ATIO_EXEC_READ BIT_1 +#define ATIO_EXEC_WRITE BIT_0 +#endif + +#ifndef CTIO_A64_TYPE +#define CTIO_A64_TYPE 0x1F +#define CTIO_SUCCESS 0x01 +#define CTIO_ABORTED 0x02 +#define CTIO_INVALID_RX_ID 0x08 +#define CTIO_TIMEOUT 0x0B +#define CTIO_LIP_RESET 0x0E +#define CTIO_TARGET_RESET 0x17 +#define CTIO_PORT_UNAVAILABLE 0x28 +#define CTIO_PORT_LOGGED_OUT 0x29 +#define CTIO_PORT_CONF_CHANGED 0x2A +#define CTIO_SRR_RECEIVED 0x45 +#endif + +#ifndef CTIO_RET_TYPE +#define CTIO_RET_TYPE 0x17 /* CTIO return entry */ +#define ATIO_TYPE7 0x06 /* Accept target I/O entry for 24xx */ + +typedef struct { + uint8_t r_ctl; + uint8_t d_id[3]; + uint8_t cs_ctl; + uint8_t s_id[3]; + uint8_t type; + uint8_t f_ctl[3]; + uint8_t seq_id; + uint8_t df_ctl; + uint16_t seq_cnt; + uint16_t ox_id; + uint16_t rx_id; + uint32_t parameter; +} __attribute__((packed)) fcp_hdr_t; + +typedef struct { + uint8_t d_id[3]; + uint8_t r_ctl; + uint8_t s_id[3]; + uint8_t cs_ctl; + uint8_t f_ctl[3]; + uint8_t type; + uint16_t seq_cnt; + uint8_t df_ctl; + uint8_t seq_id; + uint16_t rx_id; + uint16_t ox_id; + uint32_t parameter; +} __attribute__((packed)) fcp_hdr_le_t; + +#define F_CTL_EXCH_CONTEXT_RESP BIT_23 +#define F_CTL_SEQ_CONTEXT_RESIP BIT_22 +#define F_CTL_LAST_SEQ BIT_20 +#define F_CTL_END_SEQ BIT_19 +#define F_CTL_SEQ_INITIATIVE BIT_16 + +#define R_CTL_BASIC_LINK_SERV 0x80 +#define R_CTL_B_ACC 0x4 +#define R_CTL_B_RJT 0x5 + +typedef struct { + uint64_t lun; + uint8_t cmnd_ref; + uint8_t task_attr:3; + uint8_t reserved:5; + uint8_t task_mgmt_flags; +#define FCP_CMND_TASK_MGMT_CLEAR_ACA 6 +#define FCP_CMND_TASK_MGMT_TARGET_RESET 5 +#define FCP_CMND_TASK_MGMT_LU_RESET 4 +#define FCP_CMND_TASK_MGMT_CLEAR_TASK_SET 2 +#define FCP_CMND_TASK_MGMT_ABORT_TASK_SET 1 + uint8_t wrdata:1; + uint8_t rddata:1; + uint8_t add_cdb_len:6; + uint8_t cdb[16]; + /* + * add_cdb is optional and can absent from atio7_fcp_cmnd_t. Size 4 only to + * make sizeof(atio7_fcp_cmnd_t) be as expected by BUILD_BUG_ON() in + * qla_tgt_init(). + */ + uint8_t add_cdb[4]; + /* uint32_t data_length; */ +} __attribute__((packed)) atio7_fcp_cmnd_t; + +/* + * ISP queue - Accept Target I/O (ATIO) type entry IOCB structure. + * This is sent from the ISP to the target driver. + */ +typedef struct { + union { + struct { + uint16_t entry_hdr; + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t sys_define_2; /* System defined. */ + target_id_t target; + uint16_t rx_id; + uint16_t flags; + uint16_t status; + uint8_t command_ref; + uint8_t task_codes; + uint8_t task_flags; + uint8_t execution_codes; + uint8_t cdb[MAX_CMDSZ]; + uint32_t data_length; + uint16_t lun; + uint8_t initiator_port_name[WWN_SIZE]; /* on qla23xx */ + uint16_t reserved_32[6]; + uint16_t ox_id; + } isp2x; + struct { + uint16_t entry_hdr; + uint8_t fcp_cmnd_len_low; + uint8_t fcp_cmnd_len_high:4; + uint8_t attr:4; + uint32_t exchange_addr; +#define ATIO_EXCHANGE_ADDRESS_UNKNOWN 0xFFFFFFFF + fcp_hdr_t fcp_hdr; + atio7_fcp_cmnd_t fcp_cmnd; + } isp24; + struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t data[58]; + uint32_t signature; +#define ATIO_PROCESSED 0xDEADDEAD /* Signature */ + } raw; + } u; +} __attribute__((packed)) atio_from_isp_t; + +#define CTIO_TYPE7 0x12 /* Continue target I/O entry (for 24xx) */ + +/* + * ISP queue - Continue Target I/O (ATIO) type 7 entry (for 24xx) structure. + * This structure is sent to the ISP 24xx from the target driver. + */ + +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t handle; /* System defined handle */ + uint16_t nport_handle; +#define CTIO7_NHANDLE_UNRECOGNIZED 0xFFFF + uint16_t timeout; + uint16_t dseg_count; /* Data segment count. */ + uint8_t vp_index; + uint8_t add_flags; + uint8_t initiator_id[3]; + uint8_t reserved; + uint32_t exchange_addr; + union { + struct { + uint16_t reserved1; + uint16_t flags; + uint32_t residual; + uint16_t ox_id; + uint16_t scsi_status; + uint32_t relative_offset; + uint32_t reserved2; + uint32_t transfer_length; + uint32_t reserved3; + uint32_t dseg_0_address[2]; /* Data segment 0 address. */ + uint32_t dseg_0_length; /* Data segment 0 length. */ + } status0; + struct { + uint16_t sense_length; + uint16_t flags; + uint32_t residual; + uint16_t ox_id; + uint16_t scsi_status; + uint16_t response_len; + uint16_t reserved; + uint8_t sense_data[24]; + } status1; + } u; +} __attribute__((packed)) ctio7_to_24xx_t; + +/* + * ISP queue - CTIO type 7 from ISP 24xx to target driver returned entry structure. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t handle; /* System defined handle */ + uint16_t status; + uint16_t timeout; + uint16_t dseg_count; /* Data segment count. */ + uint8_t vp_index; + uint8_t reserved1[5]; + uint32_t exchange_address; + uint16_t reserved2; + uint16_t flags; + uint32_t residual; + uint16_t ox_id; + uint16_t reserved3; + uint32_t relative_offset; + uint8_t reserved4[24]; +} __attribute__((packed)) ctio7_from_24xx_t; + +/* CTIO7 flags values */ +#define CTIO7_FLAGS_SEND_STATUS BIT_15 +#define CTIO7_FLAGS_TERMINATE BIT_14 +#define CTIO7_FLAGS_CONFORM_REQ BIT_13 +#define CTIO7_FLAGS_DONT_RET_CTIO BIT_8 +#define CTIO7_FLAGS_STATUS_MODE_0 0 +#define CTIO7_FLAGS_STATUS_MODE_1 BIT_6 +#define CTIO7_FLAGS_EXPLICIT_CONFORM BIT_5 +#define CTIO7_FLAGS_CONFIRM_SATISF BIT_4 +#define CTIO7_FLAGS_DSD_PTR BIT_2 +#define CTIO7_FLAGS_DATA_IN BIT_1 +#define CTIO7_FLAGS_DATA_OUT BIT_0 + +#define ELS_PLOGI 0x3 +#define ELS_FLOGI 0x4 +#define ELS_LOGO 0x5 +#define ELS_PRLI 0x20 +#define ELS_PRLO 0x21 +#define ELS_TPRLO 0x24 +#define ELS_PDISC 0x50 +#define ELS_ADISC 0x52 + +/* + * ISP queue - ABTS received/response entries structure definition for 24xx. + */ +#define ABTS_RECV_24XX 0x54 /* ABTS received (for 24xx) */ +#define ABTS_RESP_24XX 0x55 /* ABTS responce (for 24xx) */ + +/* + * ISP queue - ABTS received IOCB entry structure definition for 24xx. + * The ABTS BLS received from the wire is sent to the + * target driver by the ISP 24xx. + * The IOCB is placed on the response queue. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint8_t reserved_1[6]; + uint16_t nport_handle; + uint8_t reserved_2[2]; + uint8_t vp_index; + uint8_t reserved_3:4; + uint8_t sof_type:4; + uint32_t exchange_address; + fcp_hdr_le_t fcp_hdr_le; + uint8_t reserved_4[16]; + uint32_t exchange_addr_to_abort; +} __attribute__((packed)) abts_recv_from_24xx_t; + +#define ABTS_PARAM_ABORT_SEQ BIT_0 + +typedef struct { + uint16_t reserved; + uint8_t seq_id_last; + uint8_t seq_id_valid; +#define SEQ_ID_VALID 0x80 +#define SEQ_ID_INVALID 0x00 + uint16_t rx_id; + uint16_t ox_id; + uint16_t high_seq_cnt; + uint16_t low_seq_cnt; +} __attribute__((packed)) ba_acc_le_t; + +typedef struct { + uint8_t vendor_uniq; + uint8_t reason_expl; + uint8_t reason_code; +#define BA_RJT_REASON_CODE_INVALID_COMMAND 0x1 +#define BA_RJT_REASON_CODE_UNABLE_TO_PERFORM 0x9 + uint8_t reserved; +} __attribute__((packed)) ba_rjt_le_t; + +/* + * ISP queue - ABTS Response IOCB entry structure definition for 24xx. + * The ABTS response to the ABTS received is sent by the + * target driver to the ISP 24xx. + * The IOCB is placed on the request queue. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t handle; + uint16_t reserved_1; + uint16_t nport_handle; + uint16_t control_flags; +#define ABTS_CONTR_FLG_TERM_EXCHG BIT_0 + uint8_t vp_index; + uint8_t reserved_3:4; + uint8_t sof_type:4; + uint32_t exchange_address; + fcp_hdr_le_t fcp_hdr_le; + union { + ba_acc_le_t ba_acct; + ba_rjt_le_t ba_rjt; + } __attribute__((packed)) payload; + uint32_t reserved_4; + uint32_t exchange_addr_to_abort; +} __attribute__((packed)) abts_resp_to_24xx_t; + +/* + * ISP queue - ABTS Response IOCB from ISP24xx Firmware entry structure. + * The ABTS response with completion status to the ABTS response + * (sent by the target driver to the ISP 24xx) is sent by the + * ISP24xx firmware to the target driver. + * The IOCB is placed on the response queue. + */ +typedef struct { + uint8_t entry_type; /* Entry type. */ + uint8_t entry_count; /* Entry count. */ + uint8_t sys_define; /* System defined. */ + uint8_t entry_status; /* Entry Status. */ + uint32_t handle; + uint16_t compl_status; +#define ABTS_RESP_COMPL_SUCCESS 0 +#define ABTS_RESP_COMPL_SUBCODE_ERROR 0x31 + uint16_t nport_handle; + uint16_t reserved_1; + uint8_t reserved_2; + uint8_t reserved_3:4; + uint8_t sof_type:4; + uint32_t exchange_address; + fcp_hdr_le_t fcp_hdr_le; + uint8_t reserved_4[8]; + uint32_t error_subcode1; +#define ABTS_RESP_SUBCODE_ERR_ABORTED_EXCH_NOT_TERM 0x1E + uint32_t error_subcode2; + uint32_t exchange_addr_to_abort; +} __attribute__((packed)) abts_resp_from_24xx_fw_t; + +/********************************************************************\ + * Type Definitions used by initiator & target halves +\********************************************************************/ + +struct qla_tgt_mgmt_cmd; +struct qla_tgt_sess; + +/* + * This structure provides a template of function calls that the + * target driver (from within qla_target.c) can issue to the + * target module (tcm_qla2xxx). + */ +struct qla_tgt_func_tmpl { + + int (*handle_cmd)(struct scsi_qla_host *, struct qla_tgt_cmd *, + unsigned char *, uint32_t, int, int, int); + int (*handle_data)(struct qla_tgt_cmd *); + int (*handle_tmr)(struct qla_tgt_mgmt_cmd *, uint32_t, uint8_t, uint32_t); + void (*free_cmd)(struct qla_tgt_cmd *); + void (*free_mcmd)(struct qla_tgt_mgmt_cmd *); + void (*free_session)(struct qla_tgt_sess *); + + int (*check_initiator_node_acl)(struct scsi_qla_host *, unsigned char *, + void *, uint8_t *, uint16_t); + struct qla_tgt_sess *(*find_sess_by_loop_id)(struct scsi_qla_host *, + const uint16_t); + struct qla_tgt_sess *(*find_sess_by_s_id)(struct scsi_qla_host *, + const uint8_t *); + void (*clear_nacl_from_fcport_map)(struct qla_tgt_sess *); + void (*put_sess)(struct qla_tgt_sess *); +}; + +int qla2x00_wait_for_hba_online(struct scsi_qla_host *); + +#include + +#define QLA_TGT_TIMEOUT 10 /* in seconds */ + +#define QLA_TGT_MAX_HW_PENDING_TIME 60 /* in seconds */ + +/* Immediate notify status constants */ +#define IMM_NTFY_LIP_RESET 0x000E +#define IMM_NTFY_LIP_LINK_REINIT 0x000F +#define IMM_NTFY_IOCB_OVERFLOW 0x0016 +#define IMM_NTFY_ABORT_TASK 0x0020 +#define IMM_NTFY_PORT_LOGOUT 0x0029 +#define IMM_NTFY_PORT_CONFIG 0x002A +#define IMM_NTFY_GLBL_TPRLO 0x002D +#define IMM_NTFY_GLBL_LOGO 0x002E +#define IMM_NTFY_RESOURCE 0x0034 +#define IMM_NTFY_MSG_RX 0x0036 +#define IMM_NTFY_SRR 0x0045 +#define IMM_NTFY_ELS 0x0046 + +/* Immediate notify task flags */ +#define IMM_NTFY_TASK_MGMT_SHIFT 8 + +#define QLA_TGT_CLEAR_ACA 0x40 +#define QLA_TGT_TARGET_RESET 0x20 +#define QLA_TGT_LUN_RESET 0x10 +#define QLA_TGT_CLEAR_TS 0x04 +#define QLA_TGT_ABORT_TS 0x02 +#define QLA_TGT_ABORT_ALL_SESS 0xFFFF +#define QLA_TGT_ABORT_ALL 0xFFFE +#define QLA_TGT_NEXUS_LOSS_SESS 0xFFFD +#define QLA_TGT_NEXUS_LOSS 0xFFFC + +/* Notify Acknowledge flags */ +#define NOTIFY_ACK_RES_COUNT BIT_8 +#define NOTIFY_ACK_CLEAR_LIP_RESET BIT_5 +#define NOTIFY_ACK_TM_RESP_CODE_VALID BIT_4 + +/* Command's states */ +#define QLA_TGT_STATE_NEW 0 /* New command and target processing it */ +#define QLA_TGT_STATE_NEED_DATA 1 /* target needs data to continue */ +#define QLA_TGT_STATE_DATA_IN 2 /* Data arrived and target is processing */ +#define QLA_TGT_STATE_PROCESSED 3 /* target done processing */ +#define QLA_TGT_STATE_ABORTED 4 /* Command aborted */ + +/* Special handles */ +#define QLA_TGT_NULL_HANDLE 0 +#define QLA_TGT_SKIP_HANDLE (0xFFFFFFFF & ~CTIO_COMPLETION_HANDLE_MARK) + +/* ATIO task_codes field */ +#define ATIO_SIMPLE_QUEUE 0 +#define ATIO_HEAD_OF_QUEUE 1 +#define ATIO_ORDERED_QUEUE 2 +#define ATIO_ACA_QUEUE 4 +#define ATIO_UNTAGGED 5 + +/* TM failed response codes, see FCP (9.4.11 FCP_RSP_INFO) */ +#define FC_TM_SUCCESS 0 +#define FC_TM_BAD_FCP_DATA 1 +#define FC_TM_BAD_CMD 2 +#define FC_TM_FCP_DATA_MISMATCH 3 +#define FC_TM_REJECT 4 +#define FC_TM_FAILED 5 + +/* + * Error code of qla_tgt_pre_xmit_response() meaning that cmd's exchange was + * terminated, so no more actions is needed and success should be returned + * to target. + */ +#define QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED 0x1717 + +#if (BITS_PER_LONG > 32) || defined(CONFIG_HIGHMEM64G) +#define pci_dma_lo32(a) (a & 0xffffffff) +#define pci_dma_hi32(a) ((((a) >> 16)>>16) & 0xffffffff) +#else +#define pci_dma_lo32(a) (a & 0xffffffff) +#define pci_dma_hi32(a) 0 +#endif + +#define QLA_TGT_SENSE_VALID(sense) ((sense != NULL) && \ + (((const uint8_t *)(sense))[0] & 0x70) == 0x70) + +struct qla_port_24xx_data { + uint8_t port_name[WWN_SIZE]; + uint16_t loop_id; + uint16_t reserved; +}; + +struct qla_tgt { + struct scsi_qla_host *vha; + struct qla_hw_data *ha; + + /* + * To sync between IRQ handlers and qla_tgt_target_release(). Needed, + * because req_pkt() can drop/reaquire HW lock inside. Protected by + * HW lock. + */ + int irq_cmd_count; + + int datasegs_per_cmd, datasegs_per_cont, sg_tablesize; + + /* Target's flags, serialized by pha->hardware_lock */ + unsigned int tgt_enable_64bit_addr:1; /* 64-bits PCI addressing enabled */ + unsigned int link_reinit_iocb_pending:1; + unsigned int tm_to_unknown:1; /* TM to unknown session was sent */ + unsigned int sess_works_pending:1; /* there are sess_work entries */ + + /* + * Protected by tgt_mutex AND hardware_lock for writing and tgt_mutex + * OR hardware_lock for reading. + */ + int tgt_stop; /* the target mode driver is being stopped */ + int tgt_stopped; /* the target mode driver has been stopped */ + + /* Count of sessions refering qla_tgt. Protected by hardware_lock. */ + int sess_count; + + /* Protected by hardware_lock. Addition also protected by tgt_mutex. */ + struct list_head sess_list; + + /* Protected by hardware_lock */ + struct list_head del_sess_list; + struct delayed_work sess_del_work; + + spinlock_t sess_work_lock; + struct list_head sess_works_list; + struct work_struct sess_work; + + imm_ntfy_from_isp_t link_reinit_iocb; + wait_queue_head_t waitQ; + int notify_ack_expected; + int abts_resp_expected; + int modify_lun_expected; + + int ctio_srr_id; + int imm_srr_id; + spinlock_t srr_lock; + struct list_head srr_ctio_list; + struct list_head srr_imm_list; + struct work_struct srr_work; + + atomic_t tgt_global_resets_count; + + struct list_head tgt_list_entry; +}; + +/* + * Equivilant to IT Nexus (Initiator-Target) + */ +struct qla_tgt_sess { + uint16_t loop_id; + port_id_t s_id; + + unsigned int conf_compl_supported:1; + unsigned int deleted:1; + unsigned int local:1; + unsigned int tearing_down:1; + + struct se_session *se_sess; + struct scsi_qla_host *vha; + struct qla_tgt *tgt; + + struct list_head sess_list_entry; + unsigned long expires; + struct list_head del_list_entry; + + uint8_t port_name[WWN_SIZE]; + struct work_struct free_work; +}; + +struct qla_tgt_cmd { + struct qla_tgt_sess *sess; + int state; + struct se_cmd se_cmd; + struct work_struct free_work; + struct work_struct work; + /* Sense buffer that will be mapped into outgoing status */ + unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; + + unsigned int conf_compl_supported:1;/* to save extra sess dereferences */ + unsigned int sg_mapped:1; + unsigned int free_sg:1; + unsigned int aborted:1; /* Needed in case of SRR */ + unsigned int write_data_transferred:1; + + struct scatterlist *sg; /* cmd data buffer SG vector */ + int sg_cnt; /* SG segments count */ + int bufflen; /* cmd buffer length */ + int offset; + uint32_t tag; + uint32_t unpacked_lun; + enum dma_data_direction dma_data_direction; + + uint16_t loop_id; /* to save extra sess dereferences */ + struct qla_tgt *tgt; /* to save extra sess dereferences */ + struct scsi_qla_host *vha; + struct list_head cmd_list; + + atio_from_isp_t atio; +}; + +struct qla_tgt_sess_work_param { + struct list_head sess_works_list_entry; + +#define QLA_TGT_SESS_WORK_ABORT 1 +#define QLA_TGT_SESS_WORK_TM 2 + int type; + + union { + abts_recv_from_24xx_t abts; + imm_ntfy_from_isp_t tm_iocb; + atio_from_isp_t tm_iocb2; + }; +}; + +struct qla_tgt_mgmt_cmd { + uint8_t tmr_func; + uint8_t fc_tm_rsp; + struct qla_tgt_sess *sess; + struct se_cmd se_cmd; + struct work_struct free_work; + unsigned int flags; +#define QLA24XX_MGMT_SEND_NACK 1 + union { + atio_from_isp_t atio; + imm_ntfy_from_isp_t imm_ntfy; + abts_recv_from_24xx_t abts; + } __attribute__((packed)) orig_iocb; +}; + +struct qla_tgt_prm { + struct qla_tgt_cmd *cmd; + struct qla_tgt *tgt; + void *pkt; + struct scatterlist *sg; /* cmd data buffer SG vector */ + int seg_cnt; + int req_cnt; + uint16_t rq_result; + uint16_t scsi_status; + unsigned char *sense_buffer; + int sense_buffer_len; + int residual; + int add_status_pkt; +}; + +struct qla_tgt_srr_imm { + struct list_head srr_list_entry; + int srr_id; + imm_ntfy_from_isp_t imm_ntfy; +}; + +struct qla_tgt_srr_ctio { + struct list_head srr_list_entry; + int srr_id; + struct qla_tgt_cmd *cmd; +}; + +#define QLA_TGT_XMIT_DATA 1 +#define QLA_TGT_XMIT_STATUS 2 +#define QLA_TGT_XMIT_ALL (QLA_TGT_XMIT_STATUS|QLA_TGT_XMIT_DATA) + +#include + +extern struct qla_tgt_data qla_target; +/* + * Internal function prototypes + */ +void qla_tgt_disable_vha(struct scsi_qla_host *); + +/* + * Function prototypes for qla_target.c logic used by qla2xxx LLD code. + */ +extern int qla_tgt_add_target(struct qla_hw_data *, struct scsi_qla_host *); +extern int qla_tgt_remove_target(struct qla_hw_data *, struct scsi_qla_host *); +extern int qla_tgt_lport_register(struct qla_tgt_func_tmpl *, u64, + int (*callback)(struct scsi_qla_host *), void *); +extern void qla_tgt_lport_deregister(struct scsi_qla_host *); +extern void qla_tgt_unreg_sess(struct qla_tgt_sess *); +extern void qla_tgt_fc_port_added(struct scsi_qla_host *, fc_port_t *); +extern void qla_tgt_fc_port_deleted(struct scsi_qla_host *, fc_port_t *); +extern void qla_tgt_set_mode(struct scsi_qla_host *ha); +extern void qla_tgt_clear_mode(struct scsi_qla_host *ha); +extern int __init qla_tgt_init(void); +extern void qla_tgt_exit(void); + +static inline bool qla_tgt_mode_enabled(struct scsi_qla_host *ha) +{ + return ha->host->active_mode & MODE_TARGET; +} + +static inline bool qla_ini_mode_enabled(struct scsi_qla_host *ha) +{ + return ha->host->active_mode & MODE_INITIATOR; +} + +static inline void qla_reverse_ini_mode(struct scsi_qla_host *ha) +{ + if (ha->host->active_mode & MODE_INITIATOR) + ha->host->active_mode &= ~MODE_INITIATOR; + else + ha->host->active_mode |= MODE_INITIATOR; +} + +/* + * Exported symbols from qla_target.c LLD logic used by qla2xxx code.. + */ +extern void qla_tgt_24xx_atio_pkt_all_vps(struct scsi_qla_host *, + atio_from_isp_t *); +extern void qla_tgt_response_pkt_all_vps(struct scsi_qla_host *, response_t *); +extern int qla_tgt_rdy_to_xfer(struct qla_tgt_cmd *); +extern int qla_tgt_xmit_response(struct qla_tgt_cmd *, int, uint8_t); +extern void qla_tgt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *); +extern void qla_tgt_free_mcmd(struct qla_tgt_mgmt_cmd *); +extern void qla_tgt_free_cmd(struct qla_tgt_cmd *cmd); +extern void qla_tgt_ctio_completion(struct scsi_qla_host *, uint32_t); +extern void qla_tgt_async_event(uint16_t, struct scsi_qla_host *, uint16_t *); +extern void qla_tgt_enable_vha(struct scsi_qla_host *); +extern void qla_tgt_vport_create(struct scsi_qla_host *, struct qla_hw_data *); +extern void qla_tgt_rff_id(struct scsi_qla_host *, struct ct_sns_req *); +extern void qla_tgt_init_atio_q_entries(struct scsi_qla_host *); +extern void qla_tgt_24xx_process_atio_queue(struct scsi_qla_host *); +extern void qla_tgt_24xx_config_rings(struct scsi_qla_host *, device_reg_t __iomem *); +extern void qla_tgt_24xx_config_nvram_stage1(struct scsi_qla_host *, struct nvram_24xx *); +extern void qla_tgt_24xx_config_nvram_stage2(struct scsi_qla_host *, struct init_cb_24xx *); +extern int qla_tgt_24xx_process_response_error(struct scsi_qla_host *, struct sts_entry_24xx *); +extern void qla_tgt_modify_vp_config(struct scsi_qla_host *, struct vp_config_entry_24xx *); +extern void qla_tgt_probe_one_stage1(struct scsi_qla_host *, struct qla_hw_data *); +extern int qla_tgt_mem_alloc(struct qla_hw_data *); +extern void qla_tgt_mem_free(struct qla_hw_data *); +extern void qla_tgt_stop_phase1(struct qla_tgt *); +extern void qla_tgt_stop_phase2(struct qla_tgt *); + +#endif /* __QLA_TARGET_H */