[SCSI] qla2xxx: Add LLD target-mode infrastructure for >= 24xx series
authorNicholas Bellinger <nab@linux-iscsi.org>
Tue, 15 May 2012 18:34:28 +0000 (14:34 -0400)
committerJames Bottomley <JBottomley@Parallels.com>
Tue, 22 May 2012 10:47:51 +0000 (11:47 +0100)
Add 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 struct qla_tgt_func_tmpl API for
external interaction to allow qla2xxx LDD to function without direct
target-core dependencies:

It also enables qla_target.c usage within existing qla2xxx LLD code.
This includes:

*) Addition of target mode specific members to existing data
structures in qla_def.h and struct qla_hw_data->tgt_ops using
qla_target.h:struct qla_tgt_func_tmpl

*) Addition of struct qla_tgt_func_tmpl and direct calls into
qla_target.c logic w/ qlt_* prefixed functions.

*) Addition of qla_iocb.c:qla2x00_req_pkt() for ring processing, and
qla2x00_issue_marker() for handling request/response queue processing
for target mode operation

*) Addition of various qla_tgt_mode_enabled() logic checks in
qla24xx_nvram_config(), qla2x00_initialize_adapter(), qla2x00_rff_id(),
qla2x00_abort_isp(), qla24xx_modify_vp_config(), and
qla2x00_vp_abort_isp().

By default the new qlini_mode module parameter is setting initiator-mode
to 'enabled' in order for 'modprobe qla2xxx' to continue to function as
expected in initiator only mode.  Enabling target-mode operation will
currently require a:

    modprobe qla2xxx qlini_mode="disabled"

in order to explictly disabled initiator mode and allow target-mode
to be enabled via tcm_qla2xxx configfs fabric callers.

(nab: 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)
(arun: Capture ATIO queue during firmware dump + Send SCR in target mode +
       Target mode review comments)
(roland: Don't create duplicate target sessions to address tearing down
         ACLs with IO in flight + Add missing call to qlt_fc_port_deleted
 call during qla2x00_schedule_rport_del timeout)

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
15 files changed:
drivers/scsi/qla2xxx/Makefile
drivers/scsi/qla2xxx/qla_attr.c
drivers/scsi/qla2xxx/qla_dbg.c
drivers/scsi/qla2xxx/qla_dbg.h
drivers/scsi/qla2xxx/qla_def.h
drivers/scsi/qla2xxx/qla_gbl.h
drivers/scsi/qla2xxx/qla_gs.c
drivers/scsi/qla2xxx/qla_init.c
drivers/scsi/qla2xxx/qla_iocb.c
drivers/scsi/qla2xxx/qla_isr.c
drivers/scsi/qla2xxx/qla_mbx.c
drivers/scsi/qla2xxx/qla_mid.c
drivers/scsi/qla2xxx/qla_os.c
drivers/scsi/qla2xxx/qla_target.c [new file with mode: 0644]
drivers/scsi/qla2xxx/qla_target.h [new file with mode: 0644]

index 5df782f4a097f9cd8b32455319f3894a5879cd06..702931ff67dbc4324958b4f3df3212cec394bbdd 100644 (file)
@@ -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
index 00df96b96a1b57d9bd4b6eed482fbb643c7feeb0..5ab953029f8d1412ee66057c641771bf69d765cd 100644 (file)
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 #include <linux/kthread.h>
 #include <linux/vmalloc.h>
@@ -1737,6 +1738,7 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
        fc_host_supported_speeds(vha->host) =
                fc_host_supported_speeds(base_vha->host);
 
+       qlt_vport_create(vha, ha);
        qla24xx_vport_disable(fc_vport, disable);
 
        if (ha->flags.cpu_affinity_enabled) {
@@ -1951,7 +1953,8 @@ qla2x00_init_host_attr(scsi_qla_host_t *vha)
        fc_host_dev_loss_tmo(vha->host) = ha->port_down_retry_count;
        fc_host_node_name(vha->host) = wwn_to_u64(vha->node_name);
        fc_host_port_name(vha->host) = wwn_to_u64(vha->port_name);
-       fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
+       fc_host_supported_classes(vha->host) = ha->tgt.enable_class_2 ?
+                       (FC_COS_CLASS2|FC_COS_CLASS3) : FC_COS_CLASS3;
        fc_host_max_npiv_vports(vha->host) = ha->max_npiv_vports;
        fc_host_npiv_vports_inuse(vha->host) = ha->cur_vport_count;
 
index 1457186a0f2cee5aaee0a71fe75966fc550deef5..fdee5611f3e2afce938c7f7ad559ce5d8eecffe9 100644 (file)
@@ -11,8 +11,8 @@
  * ----------------------------------------------------------------------
  * |             Level            |   Last Value Used  |     Holes     |
  * ----------------------------------------------------------------------
- * | Module Init and Probe        |       0x0120       | 0x4b,0xba,0xfa |
- * | Mailbox commands             |       0x113e       | 0x111a-0x111b  |
+ * | Module Init and Probe        |       0x0122       | 0x4b,0xba,0xfa |
+ * | Mailbox commands             |       0x1140       | 0x111a-0x111b  |
  * |                              |                    | 0x112c-0x112e  |
  * |                              |                    | 0x113a         |
  * | Device Discovery             |       0x2086       | 0x2020-0x2022  |
@@ -33,6 +33,9 @@
  * | ISP82XX Specific             |       0xb054       | 0xb024         |
  * | MultiQ                       |       0xc00c       |               |
  * | Misc                         |       0xd010       |               |
+ * | Target Mode                 |       0xe06f       |                |
+ * | Target Mode Management      |       0xf071       |                |
+ * | Target Mode Task Management  |      0x1000b      |                |
  * ----------------------------------------------------------------------
  */
 
@@ -379,6 +382,54 @@ qla25xx_copy_fce(struct qla_hw_data *ha, void *ptr, uint32_t **last_chain)
        return (char *)iter_reg + ntohl(fcec->size);
 }
 
+static inline void *
+qla2xxx_copy_atioqueues(struct qla_hw_data *ha, void *ptr,
+       uint32_t **last_chain)
+{
+       struct qla2xxx_mqueue_chain *q;
+       struct qla2xxx_mqueue_header *qh;
+       uint32_t num_queues;
+       int que;
+       struct {
+               int length;
+               void *ring;
+       } aq, *aqp;
+
+       if (!ha->tgt.atio_q_length)
+               return ptr;
+
+       num_queues = 1;
+       aqp = &aq;
+       aqp->length = ha->tgt.atio_q_length;
+       aqp->ring = ha->tgt.atio_ring;
+
+       for (que = 0; que < num_queues; que++) {
+               /* aqp = ha->atio_q_map[que]; */
+               q = ptr;
+               *last_chain = &q->type;
+               q->type = __constant_htonl(DUMP_CHAIN_QUEUE);
+               q->chain_size = htonl(
+                   sizeof(struct qla2xxx_mqueue_chain) +
+                   sizeof(struct qla2xxx_mqueue_header) +
+                   (aqp->length * sizeof(request_t)));
+               ptr += sizeof(struct qla2xxx_mqueue_chain);
+
+               /* Add header. */
+               qh = ptr;
+               qh->queue = __constant_htonl(TYPE_ATIO_QUEUE);
+               qh->number = htonl(que);
+               qh->size = htonl(aqp->length * sizeof(request_t));
+               ptr += sizeof(struct qla2xxx_mqueue_header);
+
+               /* Add data. */
+               memcpy(ptr, aqp->ring, aqp->length * sizeof(request_t));
+
+               ptr += aqp->length * sizeof(request_t);
+       }
+
+       return ptr;
+}
+
 static inline void *
 qla25xx_copy_mqueues(struct qla_hw_data *ha, void *ptr, uint32_t **last_chain)
 {
@@ -874,6 +925,8 @@ qla24xx_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
        struct qla24xx_fw_dump *fw;
        uint32_t        ext_mem_cnt;
        void            *nxt;
+       void            *nxt_chain;
+       uint32_t        *last_chain = NULL;
        struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 
        if (IS_QLA82XX(ha))
@@ -1092,6 +1145,16 @@ qla24xx_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
 
        qla24xx_copy_eft(ha, nxt);
 
+       nxt_chain = (void *)ha->fw_dump + ha->chain_offset;
+       nxt_chain = qla2xxx_copy_atioqueues(ha, nxt_chain, &last_chain);
+       if (last_chain) {
+               ha->fw_dump->version |= __constant_htonl(DUMP_CHAIN_VARIANT);
+               *last_chain |= __constant_htonl(DUMP_CHAIN_LAST);
+       }
+
+       /* Adjust valid length. */
+       ha->fw_dump_len = (nxt_chain - (void *)ha->fw_dump);
+
 qla24xx_fw_dump_failed_0:
        qla2xxx_dump_post_process(base_vha, rval);
 
@@ -1400,6 +1463,7 @@ qla25xx_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
        /* Chain entries -- started with MQ. */
        nxt_chain = qla25xx_copy_fce(ha, nxt_chain, &last_chain);
        nxt_chain = qla25xx_copy_mqueues(ha, nxt_chain, &last_chain);
+       nxt_chain = qla2xxx_copy_atioqueues(ha, nxt_chain, &last_chain);
        if (last_chain) {
                ha->fw_dump->version |= __constant_htonl(DUMP_CHAIN_VARIANT);
                *last_chain |= __constant_htonl(DUMP_CHAIN_LAST);
@@ -1718,6 +1782,7 @@ qla81xx_fw_dump(scsi_qla_host_t *vha, int hardware_locked)
        /* Chain entries -- started with MQ. */
        nxt_chain = qla25xx_copy_fce(ha, nxt_chain, &last_chain);
        nxt_chain = qla25xx_copy_mqueues(ha, nxt_chain, &last_chain);
+       nxt_chain = qla2xxx_copy_atioqueues(ha, nxt_chain, &last_chain);
        if (last_chain) {
                ha->fw_dump->version |= __constant_htonl(DUMP_CHAIN_VARIANT);
                *last_chain |= __constant_htonl(DUMP_CHAIN_LAST);
@@ -2219,6 +2284,7 @@ copy_queue:
        /* Chain entries -- started with MQ. */
        nxt_chain = qla25xx_copy_fce(ha, nxt_chain, &last_chain);
        nxt_chain = qla25xx_copy_mqueues(ha, nxt_chain, &last_chain);
+       nxt_chain = qla2xxx_copy_atioqueues(ha, nxt_chain, &last_chain);
        if (last_chain) {
                ha->fw_dump->version |= __constant_htonl(DUMP_CHAIN_VARIANT);
                *last_chain |= __constant_htonl(DUMP_CHAIN_LAST);
index 3ba45a73c81fcf2d573f063c449c709e8d107af2..f278df8cce0f02988e95f85e3f65d82381150f47 100644 (file)
@@ -244,6 +244,7 @@ struct qla2xxx_mqueue_header {
        uint32_t queue;
 #define TYPE_REQUEST_QUEUE     0x1
 #define TYPE_RESPONSE_QUEUE    0x2
+#define TYPE_ATIO_QUEUE                0x3
        uint32_t number;
        uint32_t size;
 };
@@ -344,3 +345,6 @@ ql_log_pci(uint32_t, struct pci_dev *pdev, int32_t, const char *fmt, ...);
                                    * more verbosity is required. It might not
                                    * be applicable to all the levels.
                                    */
+#define ql_dbg_tgt     0x00004000 /* Target mode */
+#define ql_dbg_tgt_mgt 0x00002000 /* Target mode management */
+#define ql_dbg_tgt_tmr 0x00001000 /* Target mode task management */
index 13c3fe1316fa4697715584e513b988c3a5ae21eb..39007f53aec0284b9cd855592d786823bbad5786 100644 (file)
 #define RESPONSE_ENTRY_CNT_2100                64      /* Number of response entries.*/
 #define RESPONSE_ENTRY_CNT_2300                512     /* Number of response entries.*/
 #define RESPONSE_ENTRY_CNT_MQ          128     /* Number of response entries.*/
+#define ATIO_ENTRY_CNT_24XX            4096    /* Number of ATIO entries. */
 
 struct req_que;
 
@@ -1234,11 +1235,27 @@ typedef struct {
  * ISP queue - response queue entry definition.
  */
 typedef struct {
-       uint8_t         data[60];
+       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 */
+       uint8_t         data[52];
        uint32_t        signature;
 #define RESPONSE_PROCESSED     0xDEADDEAD      /* Signature */
 } response_t;
 
+/*
+ * ISP queue - ATIO queue entry definition.
+ */
+struct atio {
+       uint8_t         entry_type;             /* Entry type. */
+       uint8_t         entry_count;            /* Entry count. */
+       uint8_t         data[58];
+       uint32_t        signature;
+#define ATIO_PROCESSED 0xDEADDEAD              /* Signature */
+};
+
 typedef union {
        uint16_t extended;
        struct {
@@ -1749,6 +1766,7 @@ static const char * const port_state_str[] = {
 #define FCF_LOGIN_NEEDED       BIT_1
 #define FCF_FCP2_DEVICE                BIT_2
 #define FCF_ASYNC_SENT         BIT_3
+#define FCF_CONF_COMP_SUPPORTED BIT_4
 
 /* No loop ID flag. */
 #define FC_NO_LOOP_ID          0x1000
@@ -2421,6 +2439,40 @@ struct qlfc_fw {
        uint32_t len;
 };
 
+struct qlt_hw_data {
+       /* Protected by hw lock */
+       uint32_t enable_class_2:1;
+       uint32_t enable_explicit_conf:1;
+       uint32_t ini_mode_force_reverse:1;
+       uint32_t node_name_set:1;
+
+       dma_addr_t atio_dma;    /* Physical address. */
+       struct atio *atio_ring; /* Base virtual address */
+       struct atio *atio_ring_ptr;     /* Current address. */
+       uint16_t atio_ring_index; /* Current index. */
+       uint16_t atio_q_length;
+
+       void *target_lport_ptr;
+       struct qla_tgt_func_tmpl *tgt_ops;
+       struct qla_tgt *qla_tgt;
+       struct qla_tgt_cmd *cmds[MAX_OUTSTANDING_COMMANDS];
+       uint16_t current_handle;
+
+       struct qla_tgt_vp_map *tgt_vp_map;
+       struct mutex tgt_mutex;
+       struct mutex tgt_host_action_mutex;
+
+       int saved_set;
+       uint16_t saved_exchange_count;
+       uint32_t saved_firmware_options_1;
+       uint32_t saved_firmware_options_2;
+       uint32_t saved_firmware_options_3;
+       uint8_t saved_firmware_options[2];
+       uint8_t saved_add_firmware_options[2];
+
+       uint8_t tgt_node_name[WWN_SIZE];
+};
+
 /*
  * Qlogic host adapter specific data structure.
 */
@@ -2463,7 +2515,8 @@ struct qla_hw_data {
                uint32_t        isp82xx_reset_hdlr_active:1;
                uint32_t        isp82xx_reset_owner:1;
                uint32_t        isp82xx_no_md_cap:1;
-               /* 28 bits */
+               uint32_t        host_shutting_down:1;
+               /* 30 bits */
        } flags;
 
        /* This spinlock is used to protect "io transactions", you must
@@ -2864,6 +2917,8 @@ struct qla_hw_data {
        dma_addr_t      md_tmplt_hdr_dma;
        void            *md_dump;
        uint32_t        md_dump_size;
+
+       struct qlt_hw_data tgt;
 };
 
 /*
@@ -2921,6 +2976,7 @@ typedef struct scsi_qla_host {
 #define FCOE_CTX_RESET_NEEDED  18      /* Initiate FCoE context reset */
 #define MPI_RESET_NEEDED       19      /* Initiate MPI FW reset */
 #define ISP_QUIESCE_NEEDED     20      /* Driver need some quiescence */
+#define SCR_PENDING            21      /* SCR in target mode */
 
        uint32_t        device_flags;
 #define SWITCH_FOUND           BIT_0
@@ -2986,6 +3042,15 @@ typedef struct scsi_qla_host {
        atomic_t        vref_count;
 } scsi_qla_host_t;
 
+#define SET_VP_IDX     1
+#define SET_AL_PA      2
+#define RESET_VP_IDX   3
+#define RESET_AL_PA    4
+struct qla_tgt_vp_map {
+       uint8_t idx;
+       scsi_qla_host_t *vha;
+};
+
 /*
  * Macros to help code, maintain, etc.
  */
index c0896996b56b0ff3573ccc498fb93a6bfa1352ff..9eacd2df111b85108dd8b3e75c3ea0320ec927b5 100644 (file)
@@ -175,6 +175,7 @@ extern int  qla2x00_vp_abort_isp(scsi_qla_host_t *);
 /*
  * Global Function Prototypes in qla_iocb.c source file.
  */
+
 extern uint16_t qla2x00_calc_iocbs_32(uint16_t);
 extern uint16_t qla2x00_calc_iocbs_64(uint16_t);
 extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);
@@ -188,6 +189,8 @@ extern uint16_t qla24xx_calc_iocbs(scsi_qla_host_t *, uint16_t);
 extern void qla24xx_build_scsi_iocbs(srb_t *, struct cmd_type_7 *, uint16_t);
 extern int qla24xx_dif_start_scsi(srb_t *);
 
+extern void *qla2x00_alloc_iocbs(scsi_qla_host_t *, srb_t *);
+extern int qla2x00_issue_marker(scsi_qla_host_t *, int);
 
 /*
  * Global Function Prototypes in qla_mbx.c source file.
@@ -238,6 +241,9 @@ qla2x00_get_retry_cnt(scsi_qla_host_t *, uint8_t *, uint8_t *, uint16_t *);
 extern int
 qla2x00_init_firmware(scsi_qla_host_t *, uint16_t);
 
+extern int
+qla2x00_get_node_name_list(scsi_qla_host_t *, void **, int *);
+
 extern int
 qla2x00_get_port_database(scsi_qla_host_t *, fc_port_t *, uint8_t);
 
@@ -548,6 +554,7 @@ extern void qla2x00_sp_free(void *, void *);
 extern void qla2x00_sp_timeout(unsigned long);
 extern void qla2x00_bsg_job_done(void *, void *, int);
 extern void qla2x00_bsg_sp_free(void *, void *);
+extern void qla2x00_start_iocbs(struct scsi_qla_host *, struct req_que *);
 
 /* Interrupt related */
 extern irqreturn_t qla82xx_intr_handler(int, void *);
index 3128f80441f5378090156e98edbd1ee6798a2033..05260d25fe469f8e28bfba0807a874c4e2173acd 100644 (file)
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 static int qla2x00_sns_ga_nxt(scsi_qla_host_t *, fc_port_t *);
 static int qla2x00_sns_gid_pt(scsi_qla_host_t *, sw_info_t *);
@@ -556,7 +557,8 @@ qla2x00_rff_id(scsi_qla_host_t *vha)
        ct_req->req.rff_id.port_id[1] = vha->d_id.b.area;
        ct_req->req.rff_id.port_id[2] = vha->d_id.b.al_pa;
 
-       ct_req->req.rff_id.fc4_feature = BIT_1;
+       qlt_rff_id(vha, ct_req);
+
        ct_req->req.rff_id.fc4_type = 0x08;             /* SCSI - FCP */
 
        /* Execute MS IOCB */
index 886b2b65396592d0a04fd2bd60ee50e92e384e16..ca5084743135cf358c397dfccaa84fbbbbfece95 100644 (file)
@@ -17,6 +17,9 @@
 #include <asm/prom.h>
 #endif
 
+#include <target/target_core_base.h>
+#include "qla_target.h"
+
 /*
 *  QLogic ISP2x00 Hardware Support Function Prototypes.
 */
@@ -518,7 +521,10 @@ qla2x00_initialize_adapter(scsi_qla_host_t *vha)
                        return QLA_FUNCTION_FAILED;
                }
        }
-       rval = qla2x00_init_rings(vha);
+
+       if (qla_ini_mode_enabled(vha))
+               rval = qla2x00_init_rings(vha);
+
        ha->flags.chip_reset_done = 1;
 
        if (rval == QLA_SUCCESS && IS_QLA84XX(ha)) {
@@ -1233,6 +1239,8 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha)
                        mq_size += ha->max_rsp_queues *
                            (rsp->length * sizeof(response_t));
                }
+               if (ha->tgt.atio_q_length)
+                       mq_size += ha->tgt.atio_q_length * sizeof(request_t);
                /* Allocate memory for Fibre Channel Event Buffer. */
                if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha))
                        goto try_eft;
@@ -1696,6 +1704,12 @@ qla24xx_config_rings(struct scsi_qla_host *vha)
        icb->response_q_address[0] = cpu_to_le32(LSD(rsp->dma));
        icb->response_q_address[1] = cpu_to_le32(MSD(rsp->dma));
 
+       /* Setup ATIO queue dma pointers for target mode */
+       icb->atio_q_inpointer = __constant_cpu_to_le16(0);
+       icb->atio_q_length = cpu_to_le16(ha->tgt.atio_q_length);
+       icb->atio_q_address[0] = cpu_to_le32(LSD(ha->tgt.atio_dma));
+       icb->atio_q_address[1] = cpu_to_le32(MSD(ha->tgt.atio_dma));
+
        if (ha->mqenable || IS_QLA83XX(ha)) {
                icb->qos = __constant_cpu_to_le16(QLA_DEFAULT_QUE_QOS);
                icb->rid = __constant_cpu_to_le16(rid);
@@ -1739,6 +1753,8 @@ qla24xx_config_rings(struct scsi_qla_host *vha)
                WRT_REG_DWORD(&reg->isp24.rsp_q_in, 0);
                WRT_REG_DWORD(&reg->isp24.rsp_q_out, 0);
        }
+       qlt_24xx_config_rings(vha, reg);
+
        /* PCI posting */
        RD_REG_DWORD(&ioreg->hccr);
 }
@@ -1794,6 +1810,11 @@ qla2x00_init_rings(scsi_qla_host_t *vha)
 
        spin_unlock(&ha->vport_slock);
 
+       ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
+       ha->tgt.atio_ring_index = 0;
+       /* Initialize ATIO queue entries */
+       qlt_init_atio_q_entries(vha);
+
        ha->isp_ops->config_rings(vha);
 
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
@@ -2051,6 +2072,10 @@ qla2x00_configure_hba(scsi_qla_host_t *vha)
        vha->d_id.b.area = area;
        vha->d_id.b.al_pa = al_pa;
 
+       spin_lock(&ha->vport_slock);
+       qlt_update_vp_map(vha, SET_AL_PA);
+       spin_unlock(&ha->vport_slock);
+
        if (!vha->flags.init_done)
                ql_log(ql_log_info, vha, 0x2010,
                    "Topology - %s, Host Loop address 0x%x.\n",
@@ -2270,7 +2295,7 @@ qla2x00_nvram_config(scsi_qla_host_t *vha)
        if (IS_QLA23XX(ha)) {
                nv->firmware_options[0] |= BIT_2;
                nv->firmware_options[0] &= ~BIT_3;
-               nv->firmware_options[0] &= ~BIT_6;
+               nv->special_options[0] &= ~BIT_6;
                nv->add_firmware_options[1] |= BIT_5 | BIT_4;
 
                if (IS_QLA2300(ha)) {
@@ -2467,14 +2492,21 @@ qla2x00_rport_del(void *data)
 {
        fc_port_t *fcport = data;
        struct fc_rport *rport;
+       scsi_qla_host_t *vha = fcport->vha;
        unsigned long flags;
 
        spin_lock_irqsave(fcport->vha->host->host_lock, flags);
        rport = fcport->drport ? fcport->drport: fcport->rport;
        fcport->drport = NULL;
        spin_unlock_irqrestore(fcport->vha->host->host_lock, flags);
-       if (rport)
+       if (rport) {
                fc_remote_port_delete(rport);
+               /*
+                * Release the target mode FC NEXUS in qla_target.c code
+                * if target mod is enabled.
+                */
+               qlt_fc_port_deleted(vha, fcport);
+       }
 }
 
 /**
@@ -2853,6 +2885,12 @@ qla2x00_reg_remote_port(scsi_qla_host_t *vha, fc_port_t *fcport)
                    "Unable to allocate fc remote port.\n");
                return;
        }
+       /*
+        * Create target mode FC NEXUS in qla_target.c if target mode is
+        * enabled..
+        */
+       qlt_fc_port_added(vha, fcport);
+
        spin_lock_irqsave(fcport->vha->host->host_lock, flags);
        *((fc_port_t **)rport->dd_data) = fcport;
        spin_unlock_irqrestore(fcport->vha->host->host_lock, flags);
@@ -3532,6 +3570,12 @@ qla2x00_fabric_login(scsi_qla_host_t *vha, fc_port_t *fcport,
                        if (mb[10] & BIT_1)
                                fcport->supported_classes |= FC_COS_CLASS3;
 
+                       if (IS_FWI2_CAPABLE(ha)) {
+                               if (mb[10] & BIT_7)
+                                       fcport->flags |=
+                                           FCF_CONF_COMP_SUPPORTED;
+                       }
+
                        rval = QLA_SUCCESS;
                        break;
                } else if (mb[0] == MBS_LOOP_ID_USED) {
@@ -4003,6 +4047,7 @@ qla2x00_restart_isp(scsi_qla_host_t *vha)
        struct qla_hw_data *ha = vha->hw;
        struct req_que *req = ha->req_q_map[0];
        struct rsp_que *rsp = ha->rsp_q_map[0];
+       unsigned long flags;
 
        /* If firmware needs to be loaded */
        if (qla2x00_isp_firmware(vha)) {
@@ -4027,6 +4072,16 @@ qla2x00_restart_isp(scsi_qla_host_t *vha)
                        qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL);
 
                        vha->flags.online = 1;
+
+                       /*
+                        * Process any ATIO queue entries that came in
+                        * while we weren't online.
+                        */
+                       spin_lock_irqsave(&ha->hardware_lock, flags);
+                       if (qla_tgt_mode_enabled(vha))
+                               qlt_24xx_process_atio_queue(vha);
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
                        /* Wait at most MAX_TARGET RSCNs for a stable link. */
                        wait_time = 256;
                        do {
@@ -4267,6 +4322,15 @@ qla24xx_nvram_config(scsi_qla_host_t *vha)
                rval = 1;
        }
 
+       if (!qla_ini_mode_enabled(vha)) {
+               /* Don't enable full login after initial LIP */
+               nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
+               /* Don't enable LIP full login for initiator */
+               nv->host_p &= __constant_cpu_to_le32(~BIT_10);
+       }
+
+       qlt_24xx_config_nvram_stage1(vha, nv);
+
        /* Reset Initialization control block */
        memset(icb, 0, ha->init_cb_size);
 
@@ -4294,8 +4358,10 @@ qla24xx_nvram_config(scsi_qla_host_t *vha)
        qla2x00_set_model_info(vha, nv->model_name, sizeof(nv->model_name),
            "QLA2462");
 
-       /* Use alternate WWN? */
+       qlt_24xx_config_nvram_stage2(vha, icb);
+
        if (nv->host_p & __constant_cpu_to_le32(BIT_15)) {
+               /* Use alternate WWN? */
                memcpy(icb->node_name, nv->alternate_node_name, WWN_SIZE);
                memcpy(icb->port_name, nv->alternate_port_name, WWN_SIZE);
        }
index 6bf6c08650e8dec7fc8833cdba435cdbb78211e7..73cc96da9421591d9a2cfb5ae7289894819d3423 100644 (file)
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 #include <linux/blkdev.h>
 #include <linux/delay.h>
@@ -470,7 +471,7 @@ queuing_error:
 /**
  * qla2x00_start_iocbs() - Execute the IOCB command
  */
-static void
+void
 qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
 {
        struct qla_hw_data *ha = vha->hw;
@@ -571,6 +572,29 @@ qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
        return (ret);
 }
 
+/*
+ * qla2x00_issue_marker
+ *
+ * Issue marker
+ * Caller CAN have hardware lock held as specified by ha_locked parameter.
+ * Might release it, then reaquire.
+ */
+int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
+{
+       if (ha_locked) {
+               if (__qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
+                                       MK_SYNC_ALL) != QLA_SUCCESS)
+                       return QLA_FUNCTION_FAILED;
+       } else {
+               if (qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
+                                       MK_SYNC_ALL) != QLA_SUCCESS)
+                       return QLA_FUNCTION_FAILED;
+       }
+       vha->marker_needed = 0;
+
+       return QLA_SUCCESS;
+}
+
 /**
  * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
  * Continuation Type 1 IOCBs to allocate.
index 0e716dcea944310ef0057d3fa03f3bd55d9cd348..6f67a9d4998b6d43fbab53a0a75918c6f607fbf0 100644 (file)
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 #include <linux/delay.h>
 #include <linux/slab.h>
@@ -473,8 +474,8 @@ skip_rio:
        case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
                ql_dbg(ql_dbg_async, vha, 0x5008,
                    "Asynchronous WAKEUP_THRES.\n");
-               break;
 
+               break;
        case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
                ql_dbg(ql_dbg_async, vha, 0x5009,
                    "LIP occurred (%x).\n", mb[1]);
@@ -685,6 +686,8 @@ skip_rio:
                        ql_dbg(ql_dbg_async, vha, 0x5011,
                            "Asynchronous PORT UPDATE ignored %04x/%04x/%04x.\n",
                            mb[1], mb[2], mb[3]);
+
+                       qlt_async_event(mb[0], vha, mb);
                        break;
                }
 
@@ -702,8 +705,13 @@ skip_rio:
 
                qla2x00_mark_all_devices_lost(vha, 1);
 
+               if (vha->vp_idx == 0 && !qla_ini_mode_enabled(vha))
+                       set_bit(SCR_PENDING, &vha->dpc_flags);
+
                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
                set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
+
+               qlt_async_event(mb[0], vha, mb);
                break;
 
        case MBA_RSCN_UPDATE:           /* State Change Registration */
@@ -825,6 +833,8 @@ skip_rio:
                    mb[0], mb[1], mb[2], mb[3]);
        }
 
+       qlt_async_event(mb[0], vha, mb);
+
        if (!vha->vp_idx && ha->num_vhosts)
                qla2x00_alert_all_vps(rsp, mb);
 }
@@ -1190,6 +1200,9 @@ qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
                } else if (iop[0] & BIT_5)
                        fcport->port_type = FCT_INITIATOR;
 
+               if (iop[0] & BIT_7)
+                       fcport->flags |= FCF_CONF_COMP_SUPPORTED;
+
                if (logio->io_parameter[7] || logio->io_parameter[8])
                        fcport->supported_classes |= FC_COS_CLASS2;
                if (logio->io_parameter[9] || logio->io_parameter[10])
@@ -2004,6 +2017,9 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
 
                if (pkt->entry_status != 0) {
                        qla2x00_error_entry(vha, rsp, (sts_entry_t *) pkt);
+
+                       (void)qlt_24xx_process_response_error(vha, pkt);
+
                        ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
                        wmb();
                        continue;
@@ -2034,6 +2050,14 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
                 case ELS_IOCB_TYPE:
                        qla24xx_els_ct_entry(vha, rsp->req, pkt, ELS_IOCB_TYPE);
                        break;
+               case ABTS_RECV_24XX:
+                       /* ensure that the ATIO queue is empty */
+                       qlt_24xx_process_atio_queue(vha);
+               case ABTS_RESP_24XX:
+               case CTIO_TYPE7:
+               case NOTIFY_ACK_TYPE:
+                       qlt_response_pkt_all_vps(vha, (response_t *)pkt);
+                       break;
                case MARKER_TYPE:
                        /* Do nothing in this case, this check is to prevent it
                         * from falling into default case
@@ -2186,6 +2210,13 @@ qla24xx_intr_handler(int irq, void *dev_id)
                case 0x14:
                        qla24xx_process_response_queue(vha, rsp);
                        break;
+               case 0x1C: /* ATIO queue updated */
+                       qlt_24xx_process_atio_queue(vha);
+                       break;
+               case 0x1D: /* ATIO and response queues updated */
+                       qlt_24xx_process_atio_queue(vha);
+                       qla24xx_process_response_queue(vha, rsp);
+                       break;
                default:
                        ql_dbg(ql_dbg_async, vha, 0x504f,
                            "Unrecognized interrupt type (%d).\n", stat * 0xff);
@@ -2330,6 +2361,13 @@ qla24xx_msix_default(int irq, void *dev_id)
                case 0x14:
                        qla24xx_process_response_queue(vha, rsp);
                        break;
+               case 0x1C: /* ATIO queue updated */
+                       qlt_24xx_process_atio_queue(vha);
+                       break;
+               case 0x1D: /* ATIO and response queues updated */
+                       qlt_24xx_process_atio_queue(vha);
+                       qla24xx_process_response_queue(vha, rsp);
+                       break;
                default:
                        ql_dbg(ql_dbg_async, vha, 0x5051,
                            "Unrecognized interrupt type (%d).\n", stat & 0xff);
index 07f4d3cbcc07e8a39a5af3038e1f711e32b6c969..d5ce92c0a8fcef8e246ef25599e9d635a9a5b454 100644 (file)
@@ -5,6 +5,7 @@
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"
+#include "qla_target.h"
 
 #include <linux/delay.h>
 #include <linux/gfp.h>
@@ -1244,6 +1245,96 @@ qla2x00_init_firmware(scsi_qla_host_t *vha, uint16_t size)
        return rval;
 }
 
+/*
+ * qla2x00_get_node_name_list
+ *      Issue get node name list mailbox command, kmalloc()
+ *      and return the resulting list. Caller must kfree() it!
+ *
+ * Input:
+ *      ha = adapter state pointer.
+ *      out_data = resulting list
+ *      out_len = length of the resulting list
+ *
+ * Returns:
+ *      qla2x00 local function return status code.
+ *
+ * Context:
+ *      Kernel context.
+ */
+int
+qla2x00_get_node_name_list(scsi_qla_host_t *vha, void **out_data, int *out_len)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_port_24xx_data *list = NULL;
+       void *pmap;
+       mbx_cmd_t mc;
+       dma_addr_t pmap_dma;
+       ulong dma_size;
+       int rval, left;
+
+       left = 1;
+       while (left > 0) {
+               dma_size = left * sizeof(*list);
+               pmap = dma_alloc_coherent(&ha->pdev->dev, dma_size,
+                                        &pmap_dma, GFP_KERNEL);
+               if (!pmap) {
+                       ql_log(ql_log_warn, vha, 0x113f,
+                           "%s(%ld): DMA Alloc failed of %ld\n",
+                           __func__, vha->host_no, dma_size);
+                       rval = QLA_MEMORY_ALLOC_FAILED;
+                       goto out;
+               }
+
+               mc.mb[0] = MBC_PORT_NODE_NAME_LIST;
+               mc.mb[1] = BIT_1 | BIT_3;
+               mc.mb[2] = MSW(pmap_dma);
+               mc.mb[3] = LSW(pmap_dma);
+               mc.mb[6] = MSW(MSD(pmap_dma));
+               mc.mb[7] = LSW(MSD(pmap_dma));
+               mc.mb[8] = dma_size;
+               mc.out_mb = MBX_0|MBX_1|MBX_2|MBX_3|MBX_6|MBX_7|MBX_8;
+               mc.in_mb = MBX_0|MBX_1;
+               mc.tov = 30;
+               mc.flags = MBX_DMA_IN;
+
+               rval = qla2x00_mailbox_command(vha, &mc);
+               if (rval != QLA_SUCCESS) {
+                       if ((mc.mb[0] == MBS_COMMAND_ERROR) &&
+                           (mc.mb[1] == 0xA)) {
+                               left += le16_to_cpu(mc.mb[2]) /
+                                   sizeof(struct qla_port_24xx_data);
+                               goto restart;
+                       }
+                       goto out_free;
+               }
+
+               left = 0;
+
+               list = kzalloc(dma_size, GFP_KERNEL);
+               if (!list) {
+                       ql_log(ql_log_warn, vha, 0x1140,
+                           "%s(%ld): failed to allocate node names list "
+                           "structure.\n", __func__, vha->host_no);
+                       rval = QLA_MEMORY_ALLOC_FAILED;
+                       goto out_free;
+               }
+
+               memcpy(list, pmap, dma_size);
+restart:
+               dma_free_coherent(&ha->pdev->dev, dma_size, pmap, pmap_dma);
+       }
+
+       *out_data = list;
+       *out_len = dma_size;
+
+out:
+       return rval;
+
+out_free:
+       dma_free_coherent(&ha->pdev->dev, dma_size, pmap, pmap_dma);
+       return rval;
+}
+
 /*
  * qla2x00_get_port_database
  *     Issue normal/enhanced get port database mailbox command
@@ -1352,6 +1443,13 @@ qla2x00_get_port_database(scsi_qla_host_t *vha, fc_port_t *fcport, uint8_t opt)
                        fcport->port_type = FCT_INITIATOR;
                else
                        fcport->port_type = FCT_TARGET;
+
+               /* Passback COS information. */
+               fcport->supported_classes = (pd24->flags & PDF_CLASS_2) ?
+                               FC_COS_CLASS2 : FC_COS_CLASS3;
+
+               if (pd24->prli_svc_param_word_3[0] & BIT_7)
+                       fcport->flags |= FCF_CONF_COMP_SUPPORTED;
        } else {
                uint64_t zero = 0;
 
@@ -1770,6 +1868,10 @@ qla24xx_login_fabric(scsi_qla_host_t *vha, uint16_t loop_id, uint8_t domain,
                        mb[10] |= BIT_0;        /* Class 2. */
                if (lg->io_parameter[9] || lg->io_parameter[10])
                        mb[10] |= BIT_1;        /* Class 3. */
+               if (lg->io_parameter[0] & __constant_cpu_to_le32(BIT_7))
+                       mb[10] |= BIT_7;        /* Confirmed Completion
+                                                * Allowed
+                                                */
        }
 
        dma_pool_free(ha->s_dma_pool, lg, lg_dma);
@@ -3096,6 +3198,9 @@ qla24xx_modify_vp_config(scsi_qla_host_t *vha)
        vpmod->vp_count = 1;
        vpmod->vp_index1 = vha->vp_idx;
        vpmod->options_idx1 = BIT_3|BIT_4|BIT_5;
+
+       qlt_modify_vp_config(vha, vpmod);
+
        memcpy(vpmod->node_name_idx1, vha->node_name, WWN_SIZE);
        memcpy(vpmod->port_name_idx1, vha->port_name, WWN_SIZE);
        vpmod->entry_count = 1;
@@ -3235,13 +3340,6 @@ qla2x00_send_change_request(scsi_qla_host_t *vha, uint16_t format,
        ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x10c7,
            "Entered %s.\n", __func__);
 
-       /*
-        * This command is implicitly executed by firmware during login for the
-        * physical hosts
-        */
-       if (vp_idx == 0)
-               return QLA_FUNCTION_FAILED;
-
        mcp->mb[0] = MBC_SEND_CHANGE_REQUEST;
        mcp->mb[1] = format;
        mcp->mb[9] = vp_idx;
index efb3cc3d6793c19bd58bf5825a7b5edc4eeac3b3..3e8b32419e68959440c8f85716867e6dfc897435 100644 (file)
@@ -6,6 +6,7 @@
  */
 #include "qla_def.h"
 #include "qla_gbl.h"
+#include "qla_target.h"
 
 #include <linux/moduleparam.h>
 #include <linux/vmalloc.h>
@@ -49,6 +50,9 @@ qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
 
        spin_lock_irqsave(&ha->vport_slock, flags);
        list_add_tail(&vha->list, &ha->vp_list);
+
+       qlt_update_vp_map(vha, SET_VP_IDX);
+
        spin_unlock_irqrestore(&ha->vport_slock, flags);
 
        mutex_unlock(&ha->vport_lock);
@@ -79,6 +83,7 @@ qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
                spin_lock_irqsave(&ha->vport_slock, flags);
        }
        list_del(&vha->list);
+       qlt_update_vp_map(vha, RESET_VP_IDX);
        spin_unlock_irqrestore(&ha->vport_slock, flags);
 
        vp_id = vha->vp_idx;
@@ -150,6 +155,9 @@ qla24xx_disable_vp(scsi_qla_host_t *vha)
        atomic_set(&vha->loop_state, LOOP_DOWN);
        atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 
+       /* Remove port id from vp target map */
+       qlt_update_vp_map(vha, RESET_AL_PA);
+
        qla2x00_mark_vp_devices_dead(vha);
        atomic_set(&vha->vp_state, VP_FAILED);
        vha->flags.management_server_logged_in = 0;
index 9387f7914e663a10ccdbd51763b0fe2f585d2d7d..9c50a8505f0706837158018f50af18c95f0f6826 100644 (file)
 #include <linux/mutex.h>
 #include <linux/kobject.h>
 #include <linux/slab.h>
-
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
 #include <scsi/scsi_transport.h>
 #include <scsi/scsi_transport_fc.h>
 
+#include "qla_target.h"
+
 /*
  * Driver version
  */
@@ -40,6 +41,12 @@ static struct kmem_cache *ctx_cachep;
  */
 int ql_errlev = ql_log_all;
 
+int ql2xenableclass2;
+module_param(ql2xenableclass2, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xenableclass2,
+               "Specify if Class 2 operations are supported from the very "
+               "beginning. Default is 0 - class 2 not supported.");
+
 int ql2xlogintimeout = 20;
 module_param(ql2xlogintimeout, int, S_IRUGO);
 MODULE_PARM_DESC(ql2xlogintimeout,
@@ -255,6 +262,8 @@ struct scsi_host_template qla2xxx_driver_template = {
 
        .max_sectors            = 0xFFFF,
        .shost_attrs            = qla2x00_host_attrs,
+
+       .supported_mode         = MODE_INITIATOR,
 };
 
 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
@@ -2187,6 +2196,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
        ql_dbg_pci(ql_dbg_init, pdev, 0x000a,
            "Memory allocated for ha=%p.\n", ha);
        ha->pdev = pdev;
+       ha->tgt.enable_class_2 = ql2xenableclass2;
 
        /* Clear our data area */
        ha->bars = bars;
@@ -2250,6 +2260,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
+               ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
                ha->gid_list_info_size = 8;
@@ -2265,6 +2276,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
+               ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
                ha->gid_list_info_size = 8;
@@ -2433,6 +2445,7 @@ que_init:
                goto probe_init_failed;
        }
 
+       qlt_probe_one_stage1(base_vha, ha);
 
        /* Set up the irqs */
        ret = qla2x00_request_irqs(ha, rsp);
@@ -2521,6 +2534,14 @@ que_init:
        ql_dbg(ql_dbg_init, base_vha, 0x00ee,
            "DPC thread started successfully.\n");
 
+       /*
+        * If we're not coming up in initiator mode, we might sit for
+        * a while without waking up the dpc thread, which leads to a
+        * stuck process warning.  So just kick the dpc once here and
+        * let the kthread start (and go back to sleep in qla2x00_do_dpc).
+        */
+       qla2xxx_wake_dpc(base_vha);
+
 skip_dpc:
        list_add_tail(&base_vha->list, &ha->vp_list);
        base_vha->host->irq = ha->pdev->irq;
@@ -2566,7 +2587,11 @@ skip_dpc:
        ql_dbg(ql_dbg_init, base_vha, 0x00f2,
            "Init done and hba is online.\n");
 
-       scsi_scan_host(host);
+       if (qla_ini_mode_enabled(base_vha))
+               scsi_scan_host(host);
+       else
+               ql_dbg(ql_dbg_init, base_vha, 0x0122,
+                       "skipping scsi_scan_host() for non-initiator port\n");
 
        qla2x00_alloc_sysfs_attr(base_vha);
 
@@ -2584,6 +2609,8 @@ skip_dpc:
            base_vha->host_no,
            ha->isp_ops->fw_version_str(base_vha, fw_str));
 
+       qlt_add_target(ha, base_vha);
+
        return 0;
 
 probe_init_failed:
@@ -2631,6 +2658,22 @@ probe_out:
        return ret;
 }
 
+static void
+qla2x00_stop_dpc_thread(scsi_qla_host_t *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct task_struct *t = ha->dpc_thread;
+
+       if (ha->dpc_thread == NULL)
+               return;
+       /*
+        * qla2xxx_wake_dpc checks for ->dpc_thread
+        * so we need to zero it out.
+        */
+       ha->dpc_thread = NULL;
+       kthread_stop(t);
+}
+
 static void
 qla2x00_shutdown(struct pci_dev *pdev)
 {
@@ -2684,6 +2727,8 @@ qla2x00_remove_one(struct pci_dev *pdev)
        base_vha = pci_get_drvdata(pdev);
        ha = base_vha->hw;
 
+       ha->flags.host_shutting_down = 1;
+
        mutex_lock(&ha->vport_lock);
        while (ha->cur_vport_count) {
                struct Scsi_Host *scsi_host;
@@ -2737,6 +2782,7 @@ qla2x00_remove_one(struct pci_dev *pdev)
                ha->dpc_thread = NULL;
                kthread_stop(t);
        }
+       qlt_remove_target(ha, base_vha);
 
        qla2x00_free_sysfs_attr(base_vha);
 
@@ -2788,17 +2834,7 @@ qla2x00_free_device(scsi_qla_host_t *vha)
        if (vha->timer_active)
                qla2x00_stop_timer(vha);
 
-       /* Kill the kernel thread for this host */
-       if (ha->dpc_thread) {
-               struct task_struct *t = ha->dpc_thread;
-
-               /*
-                * qla2xxx_wake_dpc checks for ->dpc_thread
-                * so we need to zero it out.
-                */
-               ha->dpc_thread = NULL;
-               kthread_stop(t);
-       }
+       qla2x00_stop_dpc_thread(vha);
 
        qla25xx_delete_queues(vha);
 
@@ -2860,8 +2896,10 @@ qla2x00_schedule_rport_del(struct scsi_qla_host *vha, fc_port_t *fcport,
                spin_unlock_irqrestore(vha->host->host_lock, flags);
                set_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
                qla2xxx_wake_dpc(base_vha);
-       } else
+       } else {
                fc_remote_port_delete(rport);
+               qlt_fc_port_deleted(vha, fcport);
+       }
 }
 
 /*
@@ -2964,10 +3002,13 @@ qla2x00_mem_alloc(struct qla_hw_data *ha, uint16_t req_len, uint16_t rsp_len,
        if (!ha->init_cb)
                goto fail;
 
+       if (qlt_mem_alloc(ha) < 0)
+               goto fail_free_init_cb;
+
        ha->gid_list = dma_alloc_coherent(&ha->pdev->dev,
                qla2x00_gid_list_size(ha), &ha->gid_list_dma, GFP_KERNEL);
        if (!ha->gid_list)
-               goto fail_free_init_cb;
+               goto fail_free_tgt_mem;
 
        ha->srb_mempool = mempool_create_slab_pool(SRB_MIN_REQ, srb_cachep);
        if (!ha->srb_mempool)
@@ -3185,6 +3226,8 @@ fail_free_gid_list:
        ha->gid_list_dma);
        ha->gid_list = NULL;
        ha->gid_list_dma = 0;
+fail_free_tgt_mem:
+       qlt_mem_free(ha);
 fail_free_init_cb:
        dma_free_coherent(&ha->pdev->dev, ha->init_cb_size, ha->init_cb,
        ha->init_cb_dma);
@@ -3300,6 +3343,8 @@ qla2x00_mem_free(struct qla_hw_data *ha)
        if (ha->ctx_mempool)
                mempool_destroy(ha->ctx_mempool);
 
+       qlt_mem_free(ha);
+
        if (ha->init_cb)
                dma_free_coherent(&ha->pdev->dev, ha->init_cb_size,
                        ha->init_cb, ha->init_cb_dma);
@@ -3329,6 +3374,10 @@ qla2x00_mem_free(struct qla_hw_data *ha)
 
        ha->gid_list = NULL;
        ha->gid_list_dma = 0;
+
+       ha->tgt.atio_ring = NULL;
+       ha->tgt.atio_dma = 0;
+       ha->tgt.tgt_vp_map = NULL;
 }
 
 struct scsi_qla_host *qla2x00_create_host(struct scsi_host_template *sht,
@@ -3757,6 +3806,16 @@ qla2x00_do_dpc(void *data)
                        clear_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
                }
 
+               if (test_bit(SCR_PENDING, &base_vha->dpc_flags)) {
+                       int ret;
+                       ret = qla2x00_send_change_request(base_vha, 0x3, 0);
+                       if (ret != QLA_SUCCESS)
+                               ql_log(ql_log_warn, base_vha, 0x121,
+                                   "Failed to enable receiving of RSCN "
+                                   "requests: 0x%x.\n", ret);
+                       clear_bit(SCR_PENDING, &base_vha->dpc_flags);
+               }
+
                if (test_bit(ISP_QUIESCE_NEEDED, &base_vha->dpc_flags)) {
                        ql_dbg(ql_dbg_dpc, base_vha, 0x4009,
                            "Quiescence mode scheduled.\n");
@@ -4475,6 +4534,21 @@ qla2x00_module_init(void)
                return -ENOMEM;
        }
 
+       /* Initialize target kmem_cache and mem_pools */
+       ret = qlt_init();
+       if (ret < 0) {
+               kmem_cache_destroy(srb_cachep);
+               return ret;
+       } else if (ret > 0) {
+               /*
+                * If initiator mode is explictly disabled by qlt_init(),
+                * prevent scsi_transport_fc.c:fc_scsi_scan_rport() from
+                * performing scsi_scan_target() during LOOP UP event.
+                */
+               qla2xxx_transport_functions.disable_target_scan = 1;
+               qla2xxx_transport_vport_functions.disable_target_scan = 1;
+       }
+
        /* Derive version string. */
        strcpy(qla2x00_version_str, QLA2XXX_VERSION);
        if (ql2xextended_error_logging)
@@ -4486,6 +4560,7 @@ qla2x00_module_init(void)
                kmem_cache_destroy(srb_cachep);
                ql_log(ql_log_fatal, NULL, 0x0002,
                    "fc_attach_transport failed...Failing load!.\n");
+               qlt_exit();
                return -ENODEV;
        }
 
@@ -4499,6 +4574,7 @@ qla2x00_module_init(void)
            fc_attach_transport(&qla2xxx_transport_vport_functions);
        if (!qla2xxx_transport_vport_template) {
                kmem_cache_destroy(srb_cachep);
+               qlt_exit();
                fc_release_transport(qla2xxx_transport_template);
                ql_log(ql_log_fatal, NULL, 0x0004,
                    "fc_attach_transport vport failed...Failing load!.\n");
@@ -4510,6 +4586,7 @@ qla2x00_module_init(void)
        ret = pci_register_driver(&qla2xxx_pci_driver);
        if (ret) {
                kmem_cache_destroy(srb_cachep);
+               qlt_exit();
                fc_release_transport(qla2xxx_transport_template);
                fc_release_transport(qla2xxx_transport_vport_template);
                ql_log(ql_log_fatal, NULL, 0x0006,
@@ -4529,6 +4606,7 @@ qla2x00_module_exit(void)
        pci_unregister_driver(&qla2xxx_pci_driver);
        qla2x00_release_firmware();
        kmem_cache_destroy(srb_cachep);
+       qlt_exit();
        if (ctx_cachep)
                kmem_cache_destroy(ctx_cachep);
        fc_release_transport(qla2xxx_transport_template);
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
new file mode 100644 (file)
index 0000000..04f80eb
--- /dev/null
@@ -0,0 +1,4973 @@
+/*
+ *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
+ *
+ *  based on qla2x00t.c code:
+ *
+ *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
+ *  Copyright (C) 2004 - 2005 Leonid Stoljar
+ *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
+ *  Copyright (C) 2006 - 2010 ID7 Ltd.
+ *
+ *  Forward port and refactoring to modern qla2xxx and target/configfs
+ *
+ *  Copyright (C) 2010-2011 Nicholas A. Bellinger <nab@kernel.org>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation, version 2
+ *  of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *  GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <target/target_core_base.h>
+#include <target/target_core_fabric.h>
+
+#include "qla_def.h"
+#include "qla_target.h"
+
+static 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_alloc_iocbs() and qla2x00_issue_marker(), which
+ * must be called under HW lock and could unlock/lock it inside.
+ * It isn't an issue, since in the current implementation on the time when
+ * those functions are called:
+ *
+ *   - Either context is IRQ and only IRQ handler can modify HW data,
+ *     including rings related fields,
+ *
+ *   - Or access to target mode variables from struct qla_tgt doesn't
+ *     cross those functions boundaries, except tgt_stop, which
+ *     additionally protected by irq_cmd_count.
+ */
+/* Predefs for callbacks handed to qla2xxx LLD */
+static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
+       struct atio_from_isp *pkt);
+static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
+static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
+       int fn, void *iocb, int flags);
+static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
+       *cmd, struct atio_from_isp *atio, int ha_locked);
+static void qlt_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);
+
+/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
+static struct qla_tgt_sess *qlt_find_sess_by_port_name(
+       struct qla_tgt *tgt,
+       const uint8_t *port_name)
+{
+       struct qla_tgt_sess *sess;
+
+       list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
+               if (!memcmp(sess->port_name, port_name, WWN_SIZE))
+                       return sess;
+       }
+
+       return NULL;
+}
+
+/* Might release hw lock, then reaquire!! */
+static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
+{
+       /* Send marker if required */
+       if (unlikely(vha->marker_needed != 0)) {
+               int rc = qla2x00_issue_marker(vha, vha_locked);
+               if (rc != QLA_SUCCESS) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe03d,
+                           "qla_target(%d): issue_marker() failed\n",
+                           vha->vp_idx);
+               }
+               return rc;
+       }
+       return QLA_SUCCESS;
+}
+
+static inline
+struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
+       uint8_t *d_id)
+{
+       struct qla_hw_data *ha = vha->hw;
+       uint8_t vp_idx;
+
+       if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
+               return NULL;
+
+       if (vha->d_id.b.al_pa == d_id[2])
+               return vha;
+
+       BUG_ON(ha->tgt.tgt_vp_map == NULL);
+       vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
+       if (likely(test_bit(vp_idx, ha->vp_idx_map)))
+               return ha->tgt.tgt_vp_map[vp_idx].vha;
+
+       return NULL;
+}
+
+static inline
+struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
+       uint16_t vp_idx)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       if (vha->vp_idx == vp_idx)
+               return vha;
+
+       BUG_ON(ha->tgt.tgt_vp_map == NULL);
+       if (likely(test_bit(vp_idx, ha->vp_idx_map)))
+               return ha->tgt.tgt_vp_map[vp_idx].vha;
+
+       return NULL;
+}
+
+void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
+       struct atio_from_isp *atio)
+{
+       switch (atio->u.raw.entry_type) {
+       case ATIO_TYPE7:
+       {
+               struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
+                   atio->u.isp24.fcp_hdr.d_id);
+               if (unlikely(NULL == host)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe03e,
+                           "qla_target(%d): Received ATIO_TYPE7 "
+                           "with unknown d_id %x:%x:%x\n", vha->vp_idx,
+                           atio->u.isp24.fcp_hdr.d_id[0],
+                           atio->u.isp24.fcp_hdr.d_id[1],
+                           atio->u.isp24.fcp_hdr.d_id[2]);
+                       break;
+               }
+               qlt_24xx_atio_pkt(host, atio);
+               break;
+       }
+
+       case IMMED_NOTIFY_TYPE:
+       {
+               struct scsi_qla_host *host = vha;
+               struct imm_ntfy_from_isp *entry =
+                   (struct imm_ntfy_from_isp *)atio;
+
+               if ((entry->u.isp24.vp_index != 0xFF) &&
+                   (entry->u.isp24.nport_handle != 0xFFFF)) {
+                       host = qlt_find_host_by_vp_idx(vha,
+                           entry->u.isp24.vp_index);
+                       if (unlikely(!host)) {
+                               ql_dbg(ql_dbg_tgt, vha, 0xe03f,
+                                   "qla_target(%d): Received "
+                                   "ATIO (IMMED_NOTIFY_TYPE) "
+                                   "with unknown vp_index %d\n",
+                                   vha->vp_idx, entry->u.isp24.vp_index);
+                               break;
+                       }
+               }
+               qlt_24xx_atio_pkt(host, atio);
+               break;
+       }
+
+       default:
+               ql_dbg(ql_dbg_tgt, vha, 0xe040,
+                   "qla_target(%d): Received unknown ATIO atio "
+                   "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
+               break;
+       }
+
+       return;
+}
+
+void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
+{
+       switch (pkt->entry_type) {
+       case CTIO_TYPE7:
+       {
+               struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
+               struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
+                   entry->vp_index);
+               if (unlikely(!host)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe041,
+                           "qla_target(%d): Response pkt (CTIO_TYPE7) "
+                           "received, with unknown vp_index %d\n",
+                           vha->vp_idx, entry->vp_index);
+                       break;
+               }
+               qlt_response_pkt(host, pkt);
+               break;
+       }
+
+       case IMMED_NOTIFY_TYPE:
+       {
+               struct scsi_qla_host *host = vha;
+               struct imm_ntfy_from_isp *entry =
+                   (struct imm_ntfy_from_isp *)pkt;
+
+               host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
+               if (unlikely(!host)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe042,
+                           "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
+                           "received, with unknown vp_index %d\n",
+                           vha->vp_idx, entry->u.isp24.vp_index);
+                       break;
+               }
+               qlt_response_pkt(host, pkt);
+               break;
+       }
+
+       case NOTIFY_ACK_TYPE:
+       {
+               struct scsi_qla_host *host = vha;
+               struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
+
+               if (0xFF != entry->u.isp24.vp_index) {
+                       host = qlt_find_host_by_vp_idx(vha,
+                           entry->u.isp24.vp_index);
+                       if (unlikely(!host)) {
+                               ql_dbg(ql_dbg_tgt, vha, 0xe043,
+                                   "qla_target(%d): Response "
+                                   "pkt (NOTIFY_ACK_TYPE) "
+                                   "received, with unknown "
+                                   "vp_index %d\n", vha->vp_idx,
+                                   entry->u.isp24.vp_index);
+                               break;
+                       }
+               }
+               qlt_response_pkt(host, pkt);
+               break;
+       }
+
+       case ABTS_RECV_24XX:
+       {
+               struct abts_recv_from_24xx *entry =
+                   (struct abts_recv_from_24xx *)pkt;
+               struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
+                   entry->vp_index);
+               if (unlikely(!host)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe044,
+                           "qla_target(%d): Response pkt "
+                           "(ABTS_RECV_24XX) received, with unknown "
+                           "vp_index %d\n", vha->vp_idx, entry->vp_index);
+                       break;
+               }
+               qlt_response_pkt(host, pkt);
+               break;
+       }
+
+       case ABTS_RESP_24XX:
+       {
+               struct abts_resp_to_24xx *entry =
+                   (struct abts_resp_to_24xx *)pkt;
+               struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
+                   entry->vp_index);
+               if (unlikely(!host)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe045,
+                           "qla_target(%d): Response pkt "
+                           "(ABTS_RECV_24XX) received, with unknown "
+                           "vp_index %d\n", vha->vp_idx, entry->vp_index);
+                       break;
+               }
+               qlt_response_pkt(host, pkt);
+               break;
+       }
+
+       default:
+               qlt_response_pkt(vha, pkt);
+               break;
+       }
+
+}
+
+static void qlt_free_session_done(struct work_struct *work)
+{
+       struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
+           free_work);
+       struct qla_tgt *tgt = sess->tgt;
+       struct scsi_qla_host *vha = sess->vha;
+       struct qla_hw_data *ha = vha->hw;
+
+       BUG_ON(!tgt);
+       /*
+        * Release the target session for FC Nexus from fabric module code.
+        */
+       if (sess->se_sess != NULL)
+               ha->tgt.tgt_ops->free_session(sess);
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
+           "Unregistration of sess %p finished\n", sess);
+
+       kfree(sess);
+       /*
+        * We need to protect against race, when tgt is freed before or
+        * inside wake_up()
+        */
+       tgt->sess_count--;
+       if (tgt->sess_count == 0)
+               wake_up_all(&tgt->waitQ);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+void qlt_unreg_sess(struct qla_tgt_sess *sess)
+{
+       struct scsi_qla_host *vha = sess->vha;
+
+       vha->hw->tgt.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, qlt_free_session_done);
+       schedule_work(&sess->free_work);
+}
+EXPORT_SYMBOL(qlt_unreg_sess);
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess = NULL;
+       uint32_t unpacked_lun, lun = 0;
+       uint16_t loop_id;
+       int res = 0;
+       struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
+       struct atio_from_isp *a = (struct atio_from_isp *)iocb;
+
+       loop_id = le16_to_cpu(n->u.isp24.nport_handle);
+       if (loop_id == 0xFFFF) {
+#if 0 /* FIXME: Re-enable Global event handling.. */
+               /* Global event */
+               atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
+               qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
+               if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
+                       sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
+                           typeof(*sess), sess_list_entry);
+                       switch (mcmd) {
+                       case QLA_TGT_NEXUS_LOSS_SESS:
+                               mcmd = QLA_TGT_NEXUS_LOSS;
+                               break;
+                       case QLA_TGT_ABORT_ALL_SESS:
+                               mcmd = QLA_TGT_ABORT_ALL;
+                               break;
+                       case QLA_TGT_NEXUS_LOSS:
+                       case QLA_TGT_ABORT_ALL:
+                               break;
+                       default:
+                               ql_dbg(ql_dbg_tgt, vha, 0xe046,
+                                   "qla_target(%d): Not allowed "
+                                   "command %x in %s", vha->vp_idx,
+                                   mcmd, __func__);
+                               sess = NULL;
+                               break;
+                       }
+               } else
+                       sess = NULL;
+#endif
+       } else {
+               sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
+       }
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe000,
+           "Using sess for qla_tgt_reset: %p\n", sess);
+       if (!sess) {
+               res = -ESRCH;
+               return res;
+       }
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe047,
+           "scsi(%ld): resetting (session %p from port "
+           "%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 qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
+           iocb, QLA24XX_MGMT_SEND_NACK);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
+       bool immediate)
+{
+       struct qla_tgt *tgt = sess->tgt;
+       uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
+
+       if (sess->deleted)
+               return;
+
+       ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
+           "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;
+
+       ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
+           "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 qlt_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)
+               qlt_schedule_sess_for_deletion(sess, true);
+
+       /* At this point tgt could be already dead */
+}
+
+static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
+       uint16_t *loop_id)
+{
+       struct qla_hw_data *ha = vha->hw;
+       dma_addr_t gid_list_dma;
+       struct gid_list_info *gid_list;
+       char *id_iter;
+       int res, rc, i;
+       uint16_t entries;
+
+       gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
+           &gid_list_dma, GFP_KERNEL);
+       if (!gid_list) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
+                   "qla_target(%d): DMA Alloc failed of %u\n",
+                   vha->vp_idx, qla2x00_gid_list_size(ha));
+               return -ENOMEM;
+       }
+
+       /* Get list of logged in devices */
+       rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
+       if (rc != QLA_SUCCESS) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
+                   "qla_target(%d): get_id_list() failed: %x\n",
+                   vha->vp_idx, rc);
+               res = -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 qlt_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->tgt.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 (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
+                       loop_id = le16_to_cpu(pmap24[i].loop_id);
+                       found = true;
+                       break;
+               }
+       }
+
+       kfree(pmap);
+
+       if (!found) {
+               res = false;
+               goto out;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
+           "qlt_check_fcport_exist(): loop_id %d", loop_id);
+
+       fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
+       if (fcport == NULL) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
+                   "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) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
+                   "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->tgt.qla_tgt->tgt_global_resets_count)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
+                   "qla_target(%d): global reset during session discovery"
+                   " (counter was %d, new %d), retrying",
+                   vha->vp_idx, global_resets,
+                   atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
+               goto retry;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
+           "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->flags &
+           FCF_CONF_COMP_SUPPORTED);
+
+       res = true;
+
+out_free_fcport:
+       kfree(fcport);
+
+out:
+       return res;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qlt_undelete_sess(struct qla_tgt_sess *sess)
+{
+       BUG_ON(!sess->deleted);
+
+       list_del(&sess->del_list_entry);
+       sess->deleted = 0;
+}
+
+static void qlt_del_sess_work_fn(struct delayed_work *work)
+{
+       struct qla_tgt *tgt = container_of(work, struct qla_tgt,
+           sess_del_work);
+       struct scsi_qla_host *vha = tgt->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess;
+       unsigned long flags;
+
+       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;
+
+                       qlt_undelete_sess(sess);
+
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+                       cancel = qlt_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;
+                               }
+
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
+                                   "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, 0xf004,
+                                   "Timeout: sess %p about to be deleted\n",
+                                   sess);
+                               ha->tgt.tgt_ops->shutdown_sess(sess);
+                               ha->tgt.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 *qlt_create_sess(
+       struct scsi_qla_host *vha,
+       fc_port_t *fcport,
+       bool local)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess;
+       unsigned long flags;
+       unsigned char be_sid[3];
+
+       /* Check to avoid double sessions */
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
+                               sess_list_entry) {
+               if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
+                           "Double sess %p found (s_id %x:%x:%x, "
+                           "loop_id %d), updating to d_id %x:%x:%x, "
+                           "loop_id %d", sess, sess->s_id.b.domain,
+                           sess->s_id.b.al_pa, sess->s_id.b.area,
+                           sess->loop_id, fcport->d_id.b.domain,
+                           fcport->d_id.b.al_pa, fcport->d_id.b.area,
+                           fcport->loop_id);
+
+                       if (sess->deleted)
+                               qlt_undelete_sess(sess);
+
+                       kref_get(&sess->se_sess->sess_kref);
+                       sess->s_id = fcport->d_id;
+                       sess->loop_id = fcport->loop_id;
+                       sess->conf_compl_supported = !!(fcport->flags &
+                           FCF_CONF_COMP_SUPPORTED);
+                       if (sess->local && !local)
+                               sess->local = 0;
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+                       return sess;
+               }
+       }
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       sess = kzalloc(sizeof(*sess), GFP_KERNEL);
+       if (!sess) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
+                   "qla_target(%u): session allocation failed, "
+                   "all commands from port %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->tgt.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, 0xf006,
+           "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
+           sess, ha->tgt.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.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->flags &
+           FCF_CONF_COMP_SUPPORTED);
+       BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
+       memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
+       ha->tgt.qla_tgt->sess_count++;
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
+           "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 qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       struct qla_tgt_sess *sess;
+       unsigned long flags;
+
+       if (!vha->hw->tgt.tgt_ops)
+               return;
+
+       if (!tgt || (fcport->port_type != FCT_INITIATOR))
+               return;
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       if (tgt->tgt_stop) {
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+               return;
+       }
+       sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
+       if (!sess) {
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+               mutex_lock(&ha->tgt.tgt_mutex);
+               sess = qlt_create_sess(vha, fcport, false);
+               mutex_unlock(&ha->tgt.tgt_mutex);
+
+               spin_lock_irqsave(&ha->hardware_lock, flags);
+       } else {
+               kref_get(&sess->se_sess->sess_kref);
+
+               if (sess->deleted) {
+                       qlt_undelete_sess(sess);
+
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
+                           "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, 0xf007,
+                           "Reappeared sess %p\n", sess);
+               }
+               sess->s_id = fcport->d_id;
+               sess->loop_id = fcport->loop_id;
+               sess->conf_compl_supported = !!(fcport->flags &
+                   FCF_CONF_COMP_SUPPORTED);
+       }
+
+       if (sess && sess->local) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
+                   "qla_target(%u): local session for "
+                   "port %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.tgt_ops->put_sess(sess);
+}
+
+void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       struct qla_tgt_sess *sess;
+       unsigned long flags;
+
+       if (!vha->hw->tgt.tgt_ops)
+               return;
+
+       if (!tgt || (fcport->port_type != FCT_INITIATOR))
+               return;
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       if (tgt->tgt_stop) {
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+               return;
+       }
+       sess = qlt_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, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
+
+       sess->local = 1;
+       qlt_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, 0xe002,
+           "tgt %p, empty(sess_list)=%d sess_count=%d\n",
+           tgt, list_empty(&tgt->sess_list), tgt->sess_count);
+       res = (tgt->sess_count == 0);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       return res;
+}
+
+/* Called by tcm_qla2xxx configfs code */
+void qlt_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) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
+                   "Already in tgt->tgt_stop or tgt_stopped state\n");
+               dump_stack();
+               return;
+       }
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
+           vha->host_no, vha);
+       /*
+        * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
+        * Lock is needed, because we still can get an incoming packet.
+        */
+       mutex_lock(&ha->tgt.tgt_mutex);
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       tgt->tgt_stop = 1;
+       qlt_clear_tgt_db(tgt, true);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+       mutex_unlock(&ha->tgt.tgt_mutex);
+
+       flush_delayed_work_sync(&tgt->sess_del_work);
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
+           "Waiting for sess works (tgt %p)", tgt);
+       spin_lock_irqsave(&tgt->sess_work_lock, flags);
+       while (!list_empty(&tgt->sess_works_list)) {
+               spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+               flush_scheduled_work();
+               spin_lock_irqsave(&tgt->sess_work_lock, flags);
+       }
+       spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
+           "Waiting for tgt %p: list_empty(sess_list)=%d "
+           "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
+           tgt->sess_count);
+
+       wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
+
+       /* Big hammer */
+       if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
+               qlt_disable_vha(vha);
+
+       /* Wait for sessions to clear out (just in case) */
+       wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
+}
+EXPORT_SYMBOL(qlt_stop_phase1);
+
+/* Called by tcm_qla2xxx configfs code */
+void qlt_stop_phase2(struct qla_tgt *tgt)
+{
+       struct qla_hw_data *ha = tgt->ha;
+       unsigned long flags;
+
+       if (tgt->tgt_stopped) {
+               ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
+                   "Already in tgt->tgt_stopped state\n");
+               dump_stack();
+               return;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
+           "Waiting for %d IRQ commands to complete (tgt %p)",
+           tgt->irq_cmd_count, tgt);
+
+       mutex_lock(&ha->tgt.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.tgt_mutex);
+
+       ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
+           tgt);
+}
+EXPORT_SYMBOL(qlt_stop_phase2);
+
+/* Called from qlt_remove_target() -> qla2x00_remove_one() */
+void qlt_release(struct qla_tgt *tgt)
+{
+       struct qla_hw_data *ha = tgt->ha;
+
+       if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
+               qlt_stop_phase2(tgt);
+
+       ha->tgt.qla_tgt = NULL;
+
+       ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
+           "Release of tgt %p finished\n", tgt);
+
+       kfree(tgt);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
+       const void *param, unsigned int param_size)
+{
+       struct qla_tgt_sess_work_param *prm;
+       unsigned long flags;
+
+       prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
+       if (!prm) {
+               ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
+                   "qla_target(%d): Unable to create session "
+                   "work, command will be refused", 0);
+               return -ENOMEM;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
+           "Scheduling work (type %d, prm %p)"
+           " to find session for param %p (size %d, tgt %p)\n",
+           type, prm, param, param_size, tgt);
+
+       prm->type = type;
+       memcpy(&prm->tm_iocb, param, param_size);
+
+       spin_lock_irqsave(&tgt->sess_work_lock, flags);
+       list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
+       spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+
+       schedule_work(&tgt->sess_work);
+
+       return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qlt_send_notify_ack(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *ntfy,
+       uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
+       uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
+{
+       struct qla_hw_data *ha = vha->hw;
+       request_t *pkt;
+       struct nack_to_isp *nack;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
+
+       /* Send marker if required */
+       if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
+               return;
+
+       pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
+       if (!pkt) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe049,
+                   "qla_target(%d): %s failed: unable to allocate "
+                   "request packet\n", vha->vp_idx, __func__);
+               return;
+       }
+
+       if (ha->tgt.qla_tgt != NULL)
+               ha->tgt.qla_tgt->notify_ack_expected++;
+
+       pkt->entry_type = NOTIFY_ACK_TYPE;
+       pkt->entry_count = 1;
+
+       nack = (struct nack_to_isp *)pkt;
+       nack->ox_id = ntfy->ox_id;
+
+       nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
+       if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
+               nack->u.isp24.flags = ntfy->u.isp24.flags &
+                       __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, vha, 0xe005,
+           "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 qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
+       struct abts_recv_from_24xx *abts, uint32_t status,
+       bool ids_reversed)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct abts_resp_to_24xx *resp;
+       uint32_t f_ctl;
+       uint8_t *p;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe006,
+           "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
+           ha, abts, status);
+
+       /* Send marker if required */
+       if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
+               return;
+
+       resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
+       if (!resp) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe04a,
+                   "qla_target(%d): %s failed: unable to allocate "
+                   "request packet", vha->vp_idx, __func__);
+               return;
+       }
+
+       resp->entry_type = ABTS_RESP_24XX;
+       resp->entry_count = 1;
+       resp->nport_handle = abts->nport_handle;
+       resp->vp_index = vha->vp_idx;
+       resp->sof_type = abts->sof_type;
+       resp->exchange_address = abts->exchange_address;
+       resp->fcp_hdr_le = abts->fcp_hdr_le;
+       f_ctl = __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->tgt.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 qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
+       struct abts_resp_from_24xx_fw *entry)
+{
+       struct ctio7_to_24xx *ctio;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe007,
+           "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
+       /* Send marker if required */
+       if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
+               return;
+
+       ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
+       if (ctio == NULL) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe04b,
+                   "qla_target(%d): %s failed: unable to allocate "
+                   "request packet\n", vha->vp_idx, __func__);
+               return;
+       }
+
+       /*
+        * We've got on entrance firmware's response on by us generated
+        * ABTS response. So, in it ID fields are reversed.
+        */
+
+       ctio->entry_type = CTIO_TYPE7;
+       ctio->entry_count = 1;
+       ctio->nport_handle = entry->nport_handle;
+       ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
+       ctio->timeout = __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);
+
+       qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
+           FCP_TMF_CMPL, true);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
+       struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_mgmt_cmd *mcmd;
+       int rc;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
+           "qla_target(%d): task abort (tag=%d)\n",
+           vha->vp_idx, abts->exchange_addr_to_abort);
+
+       mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
+       if (mcmd == NULL) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
+                   "qla_target(%d): %s: Allocation of ABORT cmd failed",
+                   vha->vp_idx, __func__);
+               return -ENOMEM;
+       }
+       memset(mcmd, 0, sizeof(*mcmd));
+
+       mcmd->sess = sess;
+       memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
+
+       rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK,
+           abts->exchange_addr_to_abort);
+       if (rc != 0) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
+                   "qla_target(%d):  tgt_ops->handle_tmr()"
+                   " failed: %d", vha->vp_idx, rc);
+               mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+               return -EFAULT;
+       }
+
+       return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
+       struct abts_recv_from_24xx *abts)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess;
+       uint32_t tag = abts->exchange_addr_to_abort;
+       uint8_t s_id[3];
+       int rc;
+
+       if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
+                   "qla_target(%d): ABTS: Abort Sequence not "
+                   "supported\n", vha->vp_idx);
+               qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+               return;
+       }
+
+       if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
+                   "qla_target(%d): ABTS: Unknown Exchange "
+                   "Address received\n", vha->vp_idx);
+               qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+               return;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
+           "qla_target(%d): task abort (s_id=%x:%x:%x, "
+           "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
+           abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
+           le32_to_cpu(abts->fcp_hdr_le.parameter));
+
+       s_id[0] = abts->fcp_hdr_le.s_id[2];
+       s_id[1] = abts->fcp_hdr_le.s_id[1];
+       s_id[2] = abts->fcp_hdr_le.s_id[0];
+
+       sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
+       if (!sess) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
+                   "qla_target(%d): task abort for non-existant session\n",
+                   vha->vp_idx);
+               rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
+                   QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
+               if (rc != 0) {
+                       qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
+                           false);
+               }
+               return;
+       }
+
+       rc = __qlt_24xx_handle_abts(vha, abts, sess);
+       if (rc != 0) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
+                   "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
+                   vha->vp_idx, rc);
+               qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
+               return;
+       }
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
+       struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
+{
+       struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
+       struct ctio7_to_24xx *ctio;
+
+       ql_dbg(ql_dbg_tgt, ha, 0xe008,
+           "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
+           ha, atio, resp_code);
+
+       /* Send marker if required */
+       if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
+               return;
+
+       ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
+       if (ctio == NULL) {
+               ql_dbg(ql_dbg_tgt, ha, 0xe04c,
+                   "qla_target(%d): %s failed: unable to allocate "
+                   "request packet\n", ha->vp_idx, __func__);
+               return;
+       }
+
+       ctio->entry_type = CTIO_TYPE7;
+       ctio->entry_count = 1;
+       ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
+       ctio->nport_handle = mcmd->sess->loop_id;
+       ctio->timeout = __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 qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
+{
+       mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+}
+EXPORT_SYMBOL(qlt_free_mcmd);
+
+/* callback from target fabric module code */
+void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
+{
+       struct scsi_qla_host *vha = mcmd->sess->vha;
+       struct qla_hw_data *ha = vha->hw;
+       unsigned long flags;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
+           "TM response mcmd (%p) status %#x state %#x",
+           mcmd, mcmd->fc_tm_rsp, mcmd->flags);
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
+               qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
+                   0, 0, 0, 0, 0, 0);
+       else {
+               if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
+                       qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
+                           mcmd->fc_tm_rsp, false);
+               else
+                       qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
+                           mcmd->fc_tm_rsp);
+       }
+       /*
+        * Make the callback for ->free_mcmd() to queue_work() and invoke
+        * target_put_sess_cmd() to drop cmd_kref to 1.  The final
+        * target_put_sess_cmd() call will be made from TFO->check_stop_free()
+        * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
+        * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
+        * qlt_xmit_tm_rsp() returns here..
+        */
+       ha->tgt.tgt_ops->free_mcmd(mcmd);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+EXPORT_SYMBOL(qlt_xmit_tm_rsp);
+
+/* No locks */
+static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
+{
+       struct qla_tgt_cmd *cmd = prm->cmd;
+
+       BUG_ON(cmd->sg_cnt == 0);
+
+       prm->sg = (struct scatterlist *)cmd->sg;
+       prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
+           cmd->sg_cnt, cmd->dma_data_direction);
+       if (unlikely(prm->seg_cnt == 0))
+               goto out_err;
+
+       prm->cmd->sg_mapped = 1;
+
+       /*
+        * If 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, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
+           prm->seg_cnt, prm->req_cnt);
+       return 0;
+
+out_err:
+       ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
+           "qla_target(%d): PCI mapping failed: sg_cnt=%d",
+           0, prm->cmd->sg_cnt);
+       return -1;
+}
+
+static inline void qlt_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 qlt_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(&reg->isp24.req_q_out);
+
+               ql_dbg(ql_dbg_tgt, vha, 0xe00a,
+                   "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, 0xe00b,
+                   "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 *qlt_get_req_pkt(struct scsi_qla_host *vha)
+{
+       /* Adjust ring index. */
+       vha->req->ring_index++;
+       if (vha->req->ring_index == vha->req->length) {
+               vha->req->ring_index = 0;
+               vha->req->ring_ptr = vha->req->ring;
+       } else {
+               vha->req->ring_ptr++;
+       }
+       return (cont_entry_t *)vha->req->ring_ptr;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       uint32_t h;
+
+       h = ha->tgt.current_handle;
+       /* always increment cmd handle */
+       do {
+               ++h;
+               if (h > MAX_OUTSTANDING_COMMANDS)
+                       h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
+               if (h == ha->tgt.current_handle) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe04e,
+                           "qla_target(%d): Ran out of "
+                           "empty cmd slots in ha %p\n", vha->vp_idx, ha);
+                       h = QLA_TGT_NULL_HANDLE;
+                       break;
+               }
+       } while ((h == QLA_TGT_NULL_HANDLE) ||
+           (h == QLA_TGT_SKIP_HANDLE) ||
+           (ha->tgt.cmds[h-1] != NULL));
+
+       if (h != QLA_TGT_NULL_HANDLE)
+               ha->tgt.current_handle = h;
+
+       return h;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
+       struct scsi_qla_host *vha)
+{
+       uint32_t h;
+       struct ctio7_to_24xx *pkt;
+       struct qla_hw_data *ha = vha->hw;
+       struct atio_from_isp *atio = &prm->cmd->atio;
+
+       pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
+       prm->pkt = pkt;
+       memset(pkt, 0, sizeof(*pkt));
+
+       pkt->entry_type = CTIO_TYPE7;
+       pkt->entry_count = (uint8_t)prm->req_cnt;
+       pkt->vp_index = vha->vp_idx;
+
+       h = qlt_make_handle(vha);
+       if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
+               /*
+                * CTIO type 7 from the firmware doesn't provide a way to
+                * know the initiator's LOOP ID, hence we can't find
+                * the session and, so, the command.
+                */
+               return -EAGAIN;
+       } else
+               ha->tgt.cmds[h-1] = prm->cmd;
+
+       pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
+       pkt->nport_handle = prm->cmd->loop_id;
+       pkt->timeout = __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, vha, 0xe00c,
+           "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 qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
+       struct scsi_qla_host *vha)
+{
+       int cnt;
+       uint32_t *dword_ptr;
+       int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
+
+       /* Build continuation packets */
+       while (prm->seg_cnt > 0) {
+               cont_a64_entry_t *cont_pkt64 =
+                       (cont_a64_entry_t *)qlt_get_req_pkt(vha);
+
+               /*
+                * Make sure that from cont_pkt64 none of
+                * 64-bit specific fields used for 32-bit
+                * addressing. Cast to (cont_entry_t *) for
+                * that.
+                */
+
+               memset(cont_pkt64, 0, sizeof(*cont_pkt64));
+
+               cont_pkt64->entry_count = 1;
+               cont_pkt64->sys_define = 0;
+
+               if (enable_64bit_addressing) {
+                       cont_pkt64->entry_type = CONTINUE_A64_TYPE;
+                       dword_ptr =
+                           (uint32_t *)&cont_pkt64->dseg_0_address;
+               } else {
+                       cont_pkt64->entry_type = CONTINUE_TYPE;
+                       dword_ptr =
+                           (uint32_t *)&((cont_entry_t *)
+                               cont_pkt64)->dseg_0_address;
+               }
+
+               /* Load continuation entry data segments */
+               for (cnt = 0;
+                   cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
+                   cnt++, prm->seg_cnt--) {
+                       *dword_ptr++ =
+                           cpu_to_le32(pci_dma_lo32
+                               (sg_dma_address(prm->sg)));
+                       if (enable_64bit_addressing) {
+                               *dword_ptr++ =
+                                   cpu_to_le32(pci_dma_hi32
+                                       (sg_dma_address
+                                       (prm->sg)));
+                       }
+                       *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
+
+                       ql_dbg(ql_dbg_tgt, vha, 0xe00d,
+                           "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 qlt_load_data_segments(struct qla_tgt_prm *prm,
+       struct scsi_qla_host *vha)
+{
+       int cnt;
+       uint32_t *dword_ptr;
+       int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
+       struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe00e,
+           "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, vha, 0xe00f, "%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, vha, 0xe010,
+                   "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);
+       }
+
+       qlt_load_cont_data_segments(prm, vha);
+}
+
+static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
+{
+       return cmd->bufflen > 0;
+}
+
+/*
+ * Called without ha->hardware_lock held
+ */
+static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
+       struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
+       uint32_t *full_req_cnt)
+{
+       struct qla_tgt *tgt = cmd->tgt;
+       struct scsi_qla_host *vha = tgt->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct se_cmd *se_cmd = &cmd->se_cmd;
+
+       if (unlikely(cmd->aborted)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
+                   "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;
+
+               qlt_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, vha, 0xe011, "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, 0xe012, "rq_result=%x, xmit_type=%x\n",
+           prm->rq_result, xmit_type);
+
+       /* Send marker if required */
+       if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
+               return -EFAULT;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
+
+       if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
+               if  (qlt_pci_map_calc_cnt(prm) != 0)
+                       return -EAGAIN;
+       }
+
+       *full_req_cnt = prm->req_cnt;
+
+       if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
+               prm->residual = se_cmd->residual_count;
+               ql_dbg(ql_dbg_tgt, vha, 0xe014,
+                   "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, 0xe015,
+                   "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 (qlt_has_data(cmd)) {
+                       if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
+                           (IS_FWI2_CAPABLE(ha) &&
+                           (prm->rq_result != 0))) {
+                               prm->add_status_pkt = 1;
+                               (*full_req_cnt)++;
+                       }
+               }
+       }
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe016,
+           "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 qlt_need_explicit_conf(struct qla_hw_data *ha,
+       struct qla_tgt_cmd *cmd, int sending_sense)
+{
+       if (ha->tgt.enable_class_2)
+               return 0;
+
+       if (sending_sense)
+               return cmd->conf_compl_supported;
+       else
+               return ha->tgt.enable_explicit_conf &&
+                   cmd->conf_compl_supported;
+}
+
+#ifdef CONFIG_QLA_TGT_DEBUG_SRR
+/*
+ *  Original taken from the XFS code
+ */
+static unsigned long qlt_srr_random(void)
+{
+       static int Inited;
+       static unsigned long RandomValue;
+       static DEFINE_SPINLOCK(lock);
+       /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
+       register long rv;
+       register long lo;
+       register long hi;
+       unsigned long flags;
+
+       spin_lock_irqsave(&lock, flags);
+       if (!Inited) {
+               RandomValue = jiffies;
+               Inited = 1;
+       }
+       rv = RandomValue;
+       hi = rv / 127773;
+       lo = rv % 127773;
+       rv = 16807 * lo - 2836 * hi;
+       if (rv <= 0)
+               rv += 2147483647;
+       RandomValue = rv;
+       spin_unlock_irqrestore(&lock, flags);
+       return rv;
+}
+
+static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
+{
+#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
+       if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
+           == 50) {
+               *xmit_type &= ~QLA_TGT_XMIT_STATUS;
+               ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
+                   "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
+       }
+#endif
+       /*
+        * It's currently not possible to simulate SRRs for FCP_WRITE without
+        * a physical link layer failure, so don't even try here..
+        */
+       if (cmd->dma_data_direction != DMA_FROM_DEVICE)
+               return;
+
+       if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
+           ((qlt_srr_random() % 100) == 20)) {
+               int i, leave = 0;
+               unsigned int tot_len = 0;
+
+               while (leave == 0)
+                       leave = qlt_srr_random() % cmd->sg_cnt;
+
+               for (i = 0; i < leave; i++)
+                       tot_len += cmd->sg[i].length;
+
+               ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
+                   "Cutting cmd %p (tag %d) buffer"
+                   " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
+                   " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
+                   cmd->bufflen, cmd->sg_cnt);
+
+               cmd->bufflen = tot_len;
+               cmd->sg_cnt = leave;
+       }
+
+       if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
+               unsigned int offset = qlt_srr_random() % cmd->bufflen;
+
+               ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
+                   "Cutting cmd %p (tag %d) buffer head "
+                   "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
+                   cmd->bufflen);
+               if (offset == 0)
+                       *xmit_type &= ~QLA_TGT_XMIT_DATA;
+               else if (qlt_set_data_offset(cmd, offset)) {
+                       ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
+                           "qlt_set_data_offset() failed (tag %d)", cmd->tag);
+               }
+       }
+}
+#else
+static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
+{}
+#endif
+
+static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
+       struct qla_tgt_prm *prm)
+{
+       prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
+           (uint32_t)sizeof(ctio->u.status1.sense_data));
+       ctio->u.status0.flags |=
+           __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
+       if (qlt_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 (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
+                       if (prm->cmd->se_cmd.scsi_status != 0) {
+                               ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
+                                   "Skipping EXPLICIT_CONFORM and "
+                                   "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
+                                   "non GOOD status\n");
+                               goto skip_explict_conf;
+                       }
+                       ctio->u.status1.flags |= __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) {
+                               ql_dbg(ql_dbg_tgt, vha, 0xe04f,
+                                   "qla_target(%d): %d bytes of sense "
+                                   "lost", prm->tgt->ha->vp_idx,
+                                   prm->sense_buffer_len % 4);
+                               q++;
+                       }
+               }
+#endif
+       } else {
+               ctio->u.status1.flags &=
+                   ~__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 qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
+       uint8_t scsi_status)
+{
+       struct scsi_qla_host *vha = cmd->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct ctio7_to_24xx *pkt;
+       struct qla_tgt_prm prm;
+       uint32_t full_req_cnt = 0;
+       unsigned long flags = 0;
+       int res;
+
+       memset(&prm, 0, sizeof(prm));
+       qlt_check_srr_debug(cmd, &xmit_type);
+
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
+           "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
+           "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
+           1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
+
+       res = qlt_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 = qlt_check_reserve_free_req(vha, full_req_cnt);
+       if (unlikely(res))
+               goto out_unmap_unlock;
+
+       res = qlt_24xx_build_ctio_pkt(&prm, vha);
+       if (unlikely(res != 0))
+               goto out_unmap_unlock;
+
+
+       pkt = (struct ctio7_to_24xx *)prm.pkt;
+
+       if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
+               pkt->u.status0.flags |=
+                   __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
+                       CTIO7_FLAGS_STATUS_MODE_0);
+
+               qlt_load_data_segments(&prm, vha);
+
+               if (prm.add_status_pkt == 0) {
+                       if (xmit_type & QLA_TGT_XMIT_STATUS) {
+                               pkt->u.status0.scsi_status =
+                                   cpu_to_le16(prm.rq_result);
+                               pkt->u.status0.residual =
+                                   cpu_to_le32(prm.residual);
+                               pkt->u.status0.flags |= __constant_cpu_to_le16(
+                                   CTIO7_FLAGS_SEND_STATUS);
+                               if (qlt_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().
+                        */
+                       struct ctio7_to_24xx *ctio =
+                               (struct ctio7_to_24xx *)qlt_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);
+                       qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
+                           &prm);
+                       pr_debug("Status CTIO7: %p\n", ctio);
+               }
+       } else
+               qlt_24xx_init_ctio_to_isp(pkt, &prm);
+
+
+       cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
+
+       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)
+               qlt_unmap_sg(vha, cmd);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       return res;
+}
+EXPORT_SYMBOL(qlt_xmit_response);
+
+int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
+{
+       struct ctio7_to_24xx *pkt;
+       struct scsi_qla_host *vha = cmd->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = cmd->tgt;
+       struct qla_tgt_prm prm;
+       unsigned long flags;
+       int res = 0;
+
+       memset(&prm, 0, sizeof(prm));
+       prm.cmd = cmd;
+       prm.tgt = tgt;
+       prm.sg = NULL;
+       prm.req_cnt = 1;
+
+       /* Send marker if required */
+       if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
+               return -EIO;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
+           (int)vha->vp_idx);
+
+       /* Calculate number of entries and segments required */
+       if (qlt_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 = qlt_check_reserve_free_req(vha, prm.req_cnt);
+       if (res != 0)
+               goto out_unlock_free_unmap;
+
+       res = qlt_24xx_build_ctio_pkt(&prm, vha);
+       if (unlikely(res != 0))
+               goto out_unlock_free_unmap;
+       pkt = (struct ctio7_to_24xx *)prm.pkt;
+       pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
+           CTIO7_FLAGS_STATUS_MODE_0);
+       qlt_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)
+               qlt_unmap_sg(vha, cmd);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       return res;
+}
+EXPORT_SYMBOL(qlt_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 __qlt_send_term_exchange(struct scsi_qla_host *vha,
+       struct qla_tgt_cmd *cmd,
+       struct atio_from_isp *atio)
+{
+       struct ctio7_to_24xx *ctio24;
+       struct qla_hw_data *ha = vha->hw;
+       request_t *pkt;
+       int ret = 0;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
+
+       pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
+       if (pkt == NULL) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe050,
+                   "qla_target(%d): %s failed: unable to allocate "
+                   "request packet\n", vha->vp_idx, __func__);
+               return -ENOMEM;
+       }
+
+       if (cmd != NULL) {
+               if (cmd->state < QLA_TGT_STATE_PROCESSED) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe051,
+                           "qla_target(%d): Terminating cmd %p with "
+                           "incorrect state %d\n", vha->vp_idx, cmd,
+                           cmd->state);
+               } else
+                       ret = 1;
+       }
+
+       pkt->entry_count = 1;
+       pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
+
+       ctio24 = (struct ctio7_to_24xx *)pkt;
+       ctio24->entry_type = CTIO_TYPE7;
+       ctio24->nport_handle = 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 qlt_send_term_exchange(struct scsi_qla_host *vha,
+       struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
+{
+       unsigned long flags;
+       int rc;
+
+       if (qlt_issue_marker(vha, ha_locked) < 0)
+               return;
+
+       if (ha_locked) {
+               rc = __qlt_send_term_exchange(vha, cmd, atio);
+               goto done;
+       }
+       spin_lock_irqsave(&vha->hw->hardware_lock, flags);
+       rc = __qlt_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.tgt_ops->free_cmd(cmd);
+       }
+}
+
+void qlt_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(qlt_free_cmd);
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
+       struct qla_tgt_cmd *cmd, void *ctio)
+{
+       struct qla_tgt_srr_ctio *sc;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       struct qla_tgt_srr_imm *imm;
+
+       tgt->ctio_srr_id++;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
+           "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
+
+       if (!ctio) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
+                   "qla_target(%d): SRR CTIO, but ctio is NULL\n",
+                   vha->vp_idx);
+               return -EINVAL;
+       }
+
+       sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
+       if (sc != NULL) {
+               sc->cmd = cmd;
+               /* IRQ is already OFF */
+               spin_lock(&tgt->srr_lock);
+               sc->srr_id = tgt->ctio_srr_id;
+               list_add_tail(&sc->srr_list_entry,
+                   &tgt->srr_ctio_list);
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
+                   "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
+               if (tgt->imm_srr_id == tgt->ctio_srr_id) {
+                       int found = 0;
+                       list_for_each_entry(imm, &tgt->srr_imm_list,
+                           srr_list_entry) {
+                               if (imm->srr_id == sc->srr_id) {
+                                       found = 1;
+                                       break;
+                               }
+                       }
+                       if (found) {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
+                                   "Scheduling srr work\n");
+                               schedule_work(&tgt->srr_work);
+                       } else {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
+                                   "qla_target(%d): imm_srr_id "
+                                   "== ctio_srr_id (%d), but there is no "
+                                   "corresponding SRR IMM, deleting CTIO "
+                                   "SRR %p\n", vha->vp_idx,
+                                   tgt->ctio_srr_id, sc);
+                               list_del(&sc->srr_list_entry);
+                               spin_unlock(&tgt->srr_lock);
+
+                               kfree(sc);
+                               return -EINVAL;
+                       }
+               }
+               spin_unlock(&tgt->srr_lock);
+       } else {
+               struct qla_tgt_srr_imm *ti;
+
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
+                   "qla_target(%d): Unable to allocate SRR CTIO entry\n",
+                   vha->vp_idx);
+               spin_lock(&tgt->srr_lock);
+               list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
+                   srr_list_entry) {
+                       if (imm->srr_id == tgt->ctio_srr_id) {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
+                                   "IMM SRR %p deleted (id %d)\n",
+                                   imm, imm->srr_id);
+                               list_del(&imm->srr_list_entry);
+                               qlt_reject_free_srr_imm(vha, imm, 1);
+                       }
+               }
+               spin_unlock(&tgt->srr_lock);
+
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
+       struct qla_tgt_cmd *cmd, uint32_t status)
+{
+       int term = 0;
+
+       if (ctio != NULL) {
+               struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
+               term = !(c->flags &
+                   __constant_cpu_to_le16(OF_TERM_EXCH));
+       } else
+               term = 1;
+
+       if (term)
+               qlt_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 *qlt_get_cmd(struct scsi_qla_host *vha,
+       uint32_t handle)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       handle--;
+       if (ha->tgt.cmds[handle] != NULL) {
+               struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
+               ha->tgt.cmds[handle] = NULL;
+               return cmd;
+       } else
+               return NULL;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
+       uint32_t handle, void *ctio)
+{
+       struct qla_tgt_cmd *cmd = NULL;
+
+       /* Clear out internal marks */
+       handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
+           CTIO_INTERMEDIATE_HANDLE_MARK);
+
+       if (handle != QLA_TGT_NULL_HANDLE) {
+               if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
+                           "SKIP_HANDLE CTIO\n");
+                       return NULL;
+               }
+               /* handle-1 is actually used */
+               if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe052,
+                           "qla_target(%d): Wrong handle %x received\n",
+                           vha->vp_idx, handle);
+                       return NULL;
+               }
+               cmd = qlt_get_cmd(vha, handle);
+               if (unlikely(cmd == NULL)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe053,
+                           "qla_target(%d): Suspicious: unable to "
+                           "find the command with handle %x\n", vha->vp_idx,
+                           handle);
+                       return NULL;
+               }
+       } else if (ctio != NULL) {
+               /* We can't get loop ID from CTIO7 */
+               ql_dbg(ql_dbg_tgt, vha, 0xe054,
+                   "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
+                   "support NULL handles\n", vha->vp_idx);
+               return NULL;
+       }
+
+       return cmd;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
+       uint32_t status, void *ctio)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct se_cmd *se_cmd;
+       struct target_core_fabric_ops *tfo;
+       struct qla_tgt_cmd *cmd;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe01e,
+           "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, 0xf01d,
+                           "Intermediate CTIO received"
+                           " (status %x)\n", status);
+               }
+               return;
+       }
+
+       cmd = qlt_ctio_to_cmd(vha, handle, ctio);
+       if (cmd == NULL) {
+               if (status != CTIO_SUCCESS)
+                       qlt_term_ctio_exchange(vha, ctio, NULL, status);
+               return;
+       }
+       se_cmd = &cmd->se_cmd;
+       tfo = se_cmd->se_tfo;
+
+       if (cmd->sg_mapped)
+               qlt_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 */
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
+                           "qla_target(%d): CTIO with "
+                           "status %#x received, state %x, se_cmd %p, "
+                           "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
+                           "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
+                           status, cmd->state, se_cmd);
+                       break;
+
+               case CTIO_PORT_LOGGED_OUT:
+               case CTIO_PORT_UNAVAILABLE:
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
+                           "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:
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
+                           "qla_target(%d): CTIO with SRR_RECEIVED"
+                           " status %x received (state %x, se_cmd %p)\n",
+                           vha->vp_idx, status, cmd->state, se_cmd);
+                       if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
+                               break;
+                       else
+                               return;
+
+               default:
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
+                           "qla_target(%d): CTIO with error status "
+                           "0x%x received (state %x, se_cmd %p\n",
+                           vha->vp_idx, status, cmd->state, se_cmd);
+                       break;
+               }
+
+               if (cmd->state != QLA_TGT_STATE_NEED_DATA)
+                       if (qlt_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.tgt_ops->handle_data(cmd);
+               return;
+       } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
+                   "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
+       } else {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
+                   "qla_target(%d): A command in state (%d) should "
+                   "not return a CTIO complete\n", vha->vp_idx, cmd->state);
+       }
+
+       if (unlikely(status != CTIO_SUCCESS)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
+               dump_stack();
+       }
+
+       ha->tgt.tgt_ops->free_cmd(cmd);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+/* called via callback from qla2xxx */
+void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.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++;
+       qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
+       tgt->irq_cmd_count--;
+}
+
+static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
+       uint8_t task_codes)
+{
+       int fcp_task_attr;
+
+       switch (task_codes) {
+       case ATIO_SIMPLE_QUEUE:
+               fcp_task_attr = 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:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
+                   "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 *qlt_make_local_sess(struct scsi_qla_host *,
+                                       uint8_t *);
+/*
+ * Process context for I/O path into tcm_qla2xxx code
+ */
+static void qlt_do_work(struct 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->tgt.qla_tgt;
+       struct qla_tgt_sess *sess = NULL;
+       struct atio_from_isp *atio = &cmd->atio;
+       unsigned char *cdb;
+       unsigned long flags;
+       uint32_t data_length;
+       int ret, fcp_task_attr, data_dir, bidi = 0;
+
+       if (tgt->tgt_stop)
+               goto out_term;
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
+           atio->u.isp24.fcp_hdr.s_id);
+       if (sess) {
+               if (unlikely(sess->tearing_down)) {
+                       sess = NULL;
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+                       goto out_term;
+               } else {
+                       /*
+                        * Do the extra kref_get() before dropping
+                        * qla_hw_data->hardware_lock.
+                        */
+                       kref_get(&sess->se_sess->sess_kref);
+               }
+       }
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       if (unlikely(!sess)) {
+               uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
+
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
+                       "qla_target(%d): Unable to find wwn login"
+                       " (s_id %x:%x:%x), trying to create it manually\n",
+                       vha->vp_idx, s_id[0], s_id[1], s_id[2]);
+
+               if (atio->u.raw.entry_count > 1) {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
+                               "Dropping multy entry cmd %p\n", cmd);
+                       goto out_term;
+               }
+
+               mutex_lock(&ha->tgt.tgt_mutex);
+               sess = qlt_make_local_sess(vha, s_id);
+               /* sess has an extra creation ref. */
+               mutex_unlock(&ha->tgt.tgt_mutex);
+
+               if (!sess)
+                       goto out_term;
+       }
+
+       cmd->sess = sess;
+       cmd->loop_id = sess->loop_id;
+       cmd->conf_compl_supported = sess->conf_compl_supported;
+
+       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 = qlt_get_fcp_task_attr(vha,
+           atio->u.isp24.fcp_cmnd.task_attr);
+       data_length = be32_to_cpu(get_unaligned((uint32_t *)
+           &atio->u.isp24.fcp_cmnd.add_cdb[
+           atio->u.isp24.fcp_cmnd.add_cdb_len]));
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe022,
+           "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
+           cmd, cmd->unpacked_lun, cmd->tag);
+
+       ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
+           fcp_task_attr, data_dir, bidi);
+       if (ret != 0)
+               goto out_term;
+       /*
+        * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
+        */
+       ha->tgt.tgt_ops->put_sess(sess);
+       return;
+
+out_term:
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "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);
+       qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+       if (sess)
+               ha->tgt.tgt_ops->put_sess(sess);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
+       struct atio_from_isp *atio)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       struct qla_tgt_cmd *cmd;
+
+       if (unlikely(tgt->tgt_stop)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
+                   "New command while device %p is shutting down\n", tgt);
+               return -EFAULT;
+       }
+
+       cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
+       if (!cmd) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
+                   "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->tgt.qla_tgt;
+       cmd->vha = vha;
+
+       INIT_WORK(&cmd->work, qlt_do_work);
+       queue_work(qla_tgt_wq, &cmd->work);
+       return 0;
+
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
+       int fn, void *iocb, int flags)
+{
+       struct scsi_qla_host *vha = sess->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_mgmt_cmd *mcmd;
+       int res;
+       uint8_t tmr_func;
+
+       mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
+       if (!mcmd) {
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
+                   "qla_target(%d): Allocation of management "
+                   "command failed, some commands and their data could "
+                   "leak\n", vha->vp_idx);
+               return -ENOMEM;
+       }
+       memset(mcmd, 0, sizeof(*mcmd));
+       mcmd->sess = sess;
+
+       if (iocb) {
+               memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
+                   sizeof(mcmd->orig_iocb.imm_ntfy));
+       }
+       mcmd->tmr_func = fn;
+       mcmd->flags = flags;
+
+       switch (fn) {
+       case QLA_TGT_CLEAR_ACA:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
+                   "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
+               tmr_func = TMR_CLEAR_ACA;
+               break;
+
+       case QLA_TGT_TARGET_RESET:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
+                   "qla_target(%d): TARGET_RESET received\n",
+                   sess->vha->vp_idx);
+               tmr_func = TMR_TARGET_WARM_RESET;
+               break;
+
+       case QLA_TGT_LUN_RESET:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
+                   "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
+               tmr_func = TMR_LUN_RESET;
+               break;
+
+       case QLA_TGT_CLEAR_TS:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
+                   "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
+               tmr_func = TMR_CLEAR_TASK_SET;
+               break;
+
+       case QLA_TGT_ABORT_TS:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
+                   "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
+               tmr_func = TMR_ABORT_TASK_SET;
+               break;
+#if 0
+       case QLA_TGT_ABORT_ALL:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
+                   "qla_target(%d): Doing ABORT_ALL_TASKS\n",
+                   sess->vha->vp_idx);
+               tmr_func = 0;
+               break;
+
+       case QLA_TGT_ABORT_ALL_SESS:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
+                   "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
+                   sess->vha->vp_idx);
+               tmr_func = 0;
+               break;
+
+       case QLA_TGT_NEXUS_LOSS_SESS:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
+                   "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
+                   sess->vha->vp_idx);
+               tmr_func = 0;
+               break;
+
+       case QLA_TGT_NEXUS_LOSS:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
+                   "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
+               tmr_func = 0;
+               break;
+#endif
+       default:
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
+                   "qla_target(%d): Unknown task mgmt fn 0x%x\n",
+                   sess->vha->vp_idx, fn);
+               mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+               return -ENOSYS;
+       }
+
+       res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
+       if (res != 0) {
+               ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
+                   "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
+                   sess->vha->vp_idx, res);
+               mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+               return -EFAULT;
+       }
+
+       return 0;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
+{
+       struct atio_from_isp *a = (struct atio_from_isp *)iocb;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt;
+       struct qla_tgt_sess *sess;
+       uint32_t lun, unpacked_lun;
+       int lun_size, fn;
+
+       tgt = ha->tgt.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.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, 0xf024,
+                   "qla_target(%d): task mgmt fn 0x%x for "
+                   "non-existant session\n", vha->vp_idx, fn);
+               return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
+                   sizeof(struct atio_from_isp));
+       }
+
+       return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int __qlt_abort_task(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
+{
+       struct atio_from_isp *a = (struct atio_from_isp *)iocb;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_mgmt_cmd *mcmd;
+       uint32_t lun, unpacked_lun;
+       int rc;
+
+       mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
+       if (mcmd == NULL) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
+                   "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
+                   vha->vp_idx, __func__);
+               return -ENOMEM;
+       }
+       memset(mcmd, 0, sizeof(*mcmd));
+
+       mcmd->sess = sess;
+       memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
+           sizeof(mcmd->orig_iocb.imm_ntfy));
+
+       lun = a->u.isp24.fcp_cmnd.lun;
+       unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
+
+       rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
+           le16_to_cpu(iocb->u.isp2x.seq_id));
+       if (rc != 0) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
+                   "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
+                   vha->vp_idx, rc);
+               mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
+               return -EFAULT;
+       }
+
+       return 0;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static int qlt_abort_task(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *iocb)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess;
+       int loop_id;
+
+       loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
+
+       sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
+       if (sess == NULL) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
+                   "qla_target(%d): task abort for unexisting "
+                   "session\n", vha->vp_idx);
+               return qlt_sched_sess_work(ha->tgt.qla_tgt,
+                   QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
+       }
+
+       return __qlt_abort_task(vha, iocb, sess);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *iocb)
+{
+       struct qla_hw_data *ha = vha->hw;
+       int res = 0;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
+           "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 = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
+               break;
+       case ELS_PDISC:
+       case ELS_ADISC:
+       {
+               struct qla_tgt *tgt = ha->tgt.qla_tgt;
+               if (tgt->link_reinit_iocb_pending) {
+                       qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
+                           0, 0, 0, 0, 0, 0);
+                       tgt->link_reinit_iocb_pending = 0;
+               }
+               res = 1; /* send notify ack */
+               break;
+       }
+
+       default:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
+                   "qla_target(%d): Unsupported ELS command %x "
+                   "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
+               res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
+               break;
+       }
+
+       return res;
+}
+
+static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
+{
+       struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
+       size_t first_offset = 0, rem_offset = offset, tmp = 0;
+       int i, sg_srr_cnt, bufflen = 0;
+
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
+           "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
+           "cmd->sg_cnt: %u, direction: %d\n",
+           cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
+
+       /*
+        * FIXME: Reject non zero SRR relative offset until we can test
+        * this code properly.
+        */
+       pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
+       return -1;
+
+       if (!cmd->sg || !cmd->sg_cnt) {
+               ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
+                   "Missing cmd->sg or zero cmd->sg_cnt in"
+                   " qla_tgt_set_data_offset\n");
+               return -EINVAL;
+       }
+       /*
+        * Walk the current cmd->sg list until we locate the new sg_srr_start
+        */
+       for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
+               ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
+                   "sg[%d]: %p page: %p, length: %d, offset: %d\n",
+                   i, sg, sg_page(sg), sg->length, sg->offset);
+
+               if ((sg->length + tmp) > offset) {
+                       first_offset = rem_offset;
+                       sg_srr_start = sg;
+                       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
+                           "Found matching sg[%d], using %p as sg_srr_start, "
+                           "and using first_offset: %zu\n", i, sg,
+                           first_offset);
+                       break;
+               }
+               tmp += sg->length;
+               rem_offset -= sg->length;
+       }
+
+       if (!sg_srr_start) {
+               ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
+                   "Unable to locate sg_srr_start for offset: %u\n", offset);
+               return -EINVAL;
+       }
+       sg_srr_cnt = (cmd->sg_cnt - i);
+
+       sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
+       if (!sg_srr) {
+               ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
+                   "Unable to allocate sgp\n");
+               return -ENOMEM;
+       }
+       sg_init_table(sg_srr, sg_srr_cnt);
+       sgp = &sg_srr[0];
+       /*
+        * Walk the remaining list for sg_srr_start, mapping to the newly
+        * allocated sg_srr taking first_offset into account.
+        */
+       for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
+               if (first_offset) {
+                       sg_set_page(sgp, sg_page(sg),
+                           (sg->length - first_offset), first_offset);
+                       first_offset = 0;
+               } else {
+                       sg_set_page(sgp, sg_page(sg), sg->length, 0);
+               }
+               bufflen += sgp->length;
+
+               sgp = sg_next(sgp);
+               if (!sgp)
+                       break;
+       }
+
+       cmd->sg = sg_srr;
+       cmd->sg_cnt = sg_srr_cnt;
+       cmd->bufflen = bufflen;
+       cmd->offset += offset;
+       cmd->free_sg = 1;
+
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
+           cmd->sg_cnt);
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
+           cmd->bufflen);
+       ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
+           cmd->offset);
+
+       if (cmd->sg_cnt < 0)
+               BUG();
+
+       if (cmd->bufflen < 0)
+               BUG();
+
+       return 0;
+}
+
+static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
+       uint32_t srr_rel_offs, int *xmit_type)
+{
+       int res = 0, rel_offs;
+
+       rel_offs = srr_rel_offs - cmd->offset;
+       ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
+           srr_rel_offs, rel_offs);
+
+       *xmit_type = QLA_TGT_XMIT_ALL;
+
+       if (rel_offs < 0) {
+               ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
+                   "qla_target(%d): SRR rel_offs (%d) < 0",
+                   cmd->vha->vp_idx, rel_offs);
+               res = -1;
+       } else if (rel_offs == cmd->bufflen)
+               *xmit_type = QLA_TGT_XMIT_STATUS;
+       else if (rel_offs > 0)
+               res = qlt_set_data_offset(cmd, rel_offs);
+
+       return res;
+}
+
+/* No locks, thread context */
+static void qlt_handle_srr(struct scsi_qla_host *vha,
+       struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
+{
+       struct imm_ntfy_from_isp *ntfy =
+           (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_cmd *cmd = sctio->cmd;
+       struct se_cmd *se_cmd = &cmd->se_cmd;
+       unsigned long flags;
+       int xmit_type = 0, resp = 0;
+       uint32_t offset;
+       uint16_t srr_ui;
+
+       offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
+       srr_ui = ntfy->u.isp24.srr_ui;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
+           cmd, srr_ui);
+
+       switch (srr_ui) {
+       case SRR_IU_STATUS:
+               spin_lock_irqsave(&ha->hardware_lock, flags);
+               qlt_send_notify_ack(vha, ntfy,
+                   0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+               xmit_type = QLA_TGT_XMIT_STATUS;
+               resp = 1;
+               break;
+       case SRR_IU_DATA_IN:
+               if (!cmd->sg || !cmd->sg_cnt) {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
+                           "Unable to process SRR_IU_DATA_IN due to"
+                           " missing cmd->sg, state: %d\n", cmd->state);
+                       dump_stack();
+                       goto out_reject;
+               }
+               if (se_cmd->scsi_status != 0) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe02a,
+                           "Rejecting SRR_IU_DATA_IN with non GOOD "
+                           "scsi_status\n");
+                       goto out_reject;
+               }
+               cmd->bufflen = se_cmd->data_length;
+
+               if (qlt_has_data(cmd)) {
+                       if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
+                               goto out_reject;
+                       spin_lock_irqsave(&ha->hardware_lock, flags);
+                       qlt_send_notify_ack(vha, ntfy,
+                           0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+                       resp = 1;
+               } else {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
+                           "qla_target(%d): SRR for in data for cmd "
+                           "without them (tag %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) {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
+                           "Unable to process SRR_IU_DATA_OUT due to"
+                           " missing cmd->sg\n");
+                       dump_stack();
+                       goto out_reject;
+               }
+               if (se_cmd->scsi_status != 0) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe02b,
+                           "Rejecting SRR_IU_DATA_OUT"
+                           " with non GOOD scsi_status\n");
+                       goto out_reject;
+               }
+               cmd->bufflen = se_cmd->data_length;
+
+               if (qlt_has_data(cmd)) {
+                       if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
+                               goto out_reject;
+                       spin_lock_irqsave(&ha->hardware_lock, flags);
+                       qlt_send_notify_ack(vha, ntfy,
+                           0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
+                       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+                       if (xmit_type & QLA_TGT_XMIT_DATA)
+                               qlt_rdy_to_xfer(cmd);
+               } else {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
+                           "qla_target(%d): SRR for out data for cmd "
+                           "without them (tag %d, SCSI status %d), "
+                           "reject", vha->vp_idx, cmd->tag,
+                           cmd->se_cmd.scsi_status);
+                       goto out_reject;
+               }
+               break;
+       default:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
+                   "qla_target(%d): Unknown srr_ui value %x",
+                   vha->vp_idx, srr_ui);
+               goto out_reject;
+       }
+
+       /* Transmit response in case of status and data-in cases */
+       if (resp)
+               qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
+
+       return;
+
+out_reject:
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
+           NOTIFY_ACK_SRR_FLAGS_REJECT,
+           NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
+           NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
+       if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
+               cmd->state = QLA_TGT_STATE_DATA_IN;
+               dump_stack();
+       } else
+               qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
+       struct qla_tgt_srr_imm *imm, int ha_locked)
+{
+       struct qla_hw_data *ha = vha->hw;
+       unsigned long flags = 0;
+
+       if (!ha_locked)
+               spin_lock_irqsave(&ha->hardware_lock, flags);
+
+       qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
+           NOTIFY_ACK_SRR_FLAGS_REJECT,
+           NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
+           NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
+
+       if (!ha_locked)
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       kfree(imm);
+}
+
+static void qlt_handle_srr_work(struct work_struct *work)
+{
+       struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
+       struct scsi_qla_host *vha = tgt->vha;
+       struct qla_tgt_srr_ctio *sctio;
+       unsigned long flags;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
+           tgt);
+
+restart:
+       spin_lock_irqsave(&tgt->srr_lock, flags);
+       list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
+               struct qla_tgt_srr_imm *imm, *i, *ti;
+               struct qla_tgt_cmd *cmd;
+               struct se_cmd *se_cmd;
+
+               imm = NULL;
+               list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
+                                               srr_list_entry) {
+                       if (i->srr_id == sctio->srr_id) {
+                               list_del(&i->srr_list_entry);
+                               if (imm) {
+                                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
+                                         "qla_target(%d): There must be "
+                                         "only one IMM SRR per CTIO SRR "
+                                         "(IMM SRR %p, id %d, CTIO %p\n",
+                                         vha->vp_idx, i, i->srr_id, sctio);
+                                       qlt_reject_free_srr_imm(tgt->vha, i, 0);
+                               } else
+                                       imm = i;
+                       }
+               }
+
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
+                   "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
+                   sctio->srr_id);
+
+               if (imm == NULL) {
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
+                           "Not found matching IMM for SRR CTIO (id %d)\n",
+                           sctio->srr_id);
+                       continue;
+               } else
+                       list_del(&sctio->srr_list_entry);
+
+               spin_unlock_irqrestore(&tgt->srr_lock, flags);
+
+               cmd = sctio->cmd;
+               /*
+                * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
+                * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
+                * logic..
+                */
+               cmd->offset = 0;
+               if (cmd->free_sg) {
+                       kfree(cmd->sg);
+                       cmd->sg = NULL;
+                       cmd->free_sg = 0;
+               }
+               se_cmd = &cmd->se_cmd;
+
+               cmd->sg_cnt = se_cmd->t_data_nents;
+               cmd->sg = se_cmd->t_data_sg;
+
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
+                   "SRR cmd %p (se_cmd %p, tag %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);
+
+               qlt_handle_srr(vha, sctio, imm);
+
+               kfree(imm);
+               kfree(sctio);
+               goto restart;
+       }
+       spin_unlock_irqrestore(&tgt->srr_lock, flags);
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *iocb)
+{
+       struct qla_tgt_srr_imm *imm;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       struct qla_tgt_srr_ctio *sctio;
+
+       tgt->imm_srr_id++;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
+           vha->vp_idx);
+
+       imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
+       if (imm != NULL) {
+               memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
+
+               /* IRQ is already OFF */
+               spin_lock(&tgt->srr_lock);
+               imm->srr_id = tgt->imm_srr_id;
+               list_add_tail(&imm->srr_list_entry,
+                   &tgt->srr_imm_list);
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
+                   "IMM NTFY SRR %p added (id %d, ui %x)\n",
+                   imm, imm->srr_id, iocb->u.isp24.srr_ui);
+               if (tgt->imm_srr_id == tgt->ctio_srr_id) {
+                       int found = 0;
+                       list_for_each_entry(sctio, &tgt->srr_ctio_list,
+                           srr_list_entry) {
+                               if (sctio->srr_id == imm->srr_id) {
+                                       found = 1;
+                                       break;
+                               }
+                       }
+                       if (found) {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
+                                   "Scheduling srr work\n");
+                               schedule_work(&tgt->srr_work);
+                       } else {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
+                                   "qla_target(%d): imm_srr_id "
+                                   "== ctio_srr_id (%d), but there is no "
+                                   "corresponding SRR CTIO, deleting IMM "
+                                   "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
+                                   imm);
+                               list_del(&imm->srr_list_entry);
+
+                               kfree(imm);
+
+                               spin_unlock(&tgt->srr_lock);
+                               goto out_reject;
+                       }
+               }
+               spin_unlock(&tgt->srr_lock);
+       } else {
+               struct qla_tgt_srr_ctio *ts;
+
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
+                   "qla_target(%d): Unable to allocate SRR IMM "
+                   "entry, SRR request will be rejected\n", vha->vp_idx);
+
+               /* IRQ is already OFF */
+               spin_lock(&tgt->srr_lock);
+               list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
+                   srr_list_entry) {
+                       if (sctio->srr_id == tgt->imm_srr_id) {
+                               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
+                                   "CTIO SRR %p deleted (id %d)\n",
+                                   sctio, sctio->srr_id);
+                               list_del(&sctio->srr_list_entry);
+                               qlt_send_term_exchange(vha, sctio->cmd,
+                                   &sctio->cmd->atio, 1);
+                               kfree(sctio);
+                       }
+               }
+               spin_unlock(&tgt->srr_lock);
+               goto out_reject;
+       }
+
+       return;
+
+out_reject:
+       qlt_send_notify_ack(vha, iocb, 0, 0, 0,
+           NOTIFY_ACK_SRR_FLAGS_REJECT,
+           NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
+           NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
+       struct imm_ntfy_from_isp *iocb)
+{
+       struct qla_hw_data *ha = vha->hw;
+       uint32_t add_flags = 0;
+       int send_notify_ack = 1;
+       uint16_t status;
+
+       status = le16_to_cpu(iocb->u.isp2x.status);
+       switch (status) {
+       case IMM_NTFY_LIP_RESET:
+       {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
+                   "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
+                   vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
+                   iocb->u.isp24.status_subcode);
+
+               if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
+                       send_notify_ack = 0;
+               break;
+       }
+
+       case IMM_NTFY_LIP_LINK_REINIT:
+       {
+               struct qla_tgt *tgt = ha->tgt.qla_tgt;
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
+                   "qla_target(%d): LINK REINIT (loop %#x, "
+                   "subcode %x)\n", vha->vp_idx,
+                   le16_to_cpu(iocb->u.isp24.nport_handle),
+                   iocb->u.isp24.status_subcode);
+               if (tgt->link_reinit_iocb_pending) {
+                       qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
+                           0, 0, 0, 0, 0, 0);
+               }
+               memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
+               tgt->link_reinit_iocb_pending = 1;
+               /*
+                * QLogic requires to wait after LINK REINIT for possible
+                * PDISC or ADISC ELS commands
+                */
+               send_notify_ack = 0;
+               break;
+       }
+
+       case IMM_NTFY_PORT_LOGOUT:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
+                   "qla_target(%d): Port logout (loop "
+                   "%#x, subcode %x)\n", vha->vp_idx,
+                   le16_to_cpu(iocb->u.isp24.nport_handle),
+                   iocb->u.isp24.status_subcode);
+
+               if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
+                       send_notify_ack = 0;
+               /* The sessions will be cleared in the callback, if needed */
+               break;
+
+       case IMM_NTFY_GLBL_TPRLO:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
+                   "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
+               if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
+                       send_notify_ack = 0;
+               /* The sessions will be cleared in the callback, if needed */
+               break;
+
+       case IMM_NTFY_PORT_CONFIG:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
+                   "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
+                   status);
+               if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
+                       send_notify_ack = 0;
+               /* The sessions will be cleared in the callback, if needed */
+               break;
+
+       case IMM_NTFY_GLBL_LOGO:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
+                   "qla_target(%d): Link failure detected\n",
+                   vha->vp_idx);
+               /* I_T nexus loss */
+               if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
+                       send_notify_ack = 0;
+               break;
+
+       case IMM_NTFY_IOCB_OVERFLOW:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
+                   "qla_target(%d): Cannot provide requested "
+                   "capability (IOCB overflowed the immediate notify "
+                   "resource count)\n", vha->vp_idx);
+               break;
+
+       case IMM_NTFY_ABORT_TASK:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
+                   "qla_target(%d): Abort Task (S %08x I %#x -> "
+                   "L %#x)\n", vha->vp_idx,
+                   le16_to_cpu(iocb->u.isp2x.seq_id),
+                   GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
+                   le16_to_cpu(iocb->u.isp2x.lun));
+               if (qlt_abort_task(vha, iocb) == 0)
+                       send_notify_ack = 0;
+               break;
+
+       case IMM_NTFY_RESOURCE:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
+                   "qla_target(%d): Out of resources, host %ld\n",
+                   vha->vp_idx, vha->host_no);
+               break;
+
+       case IMM_NTFY_MSG_RX:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
+                   "qla_target(%d): Immediate notify task %x\n",
+                   vha->vp_idx, iocb->u.isp2x.task_flags);
+               if (qlt_handle_task_mgmt(vha, iocb) == 0)
+                       send_notify_ack = 0;
+               break;
+
+       case IMM_NTFY_ELS:
+               if (qlt_24xx_handle_els(vha, iocb) == 0)
+                       send_notify_ack = 0;
+               break;
+
+       case IMM_NTFY_SRR:
+               qlt_prepare_srr_imm(vha, iocb);
+               send_notify_ack = 0;
+               break;
+
+       default:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
+                   "qla_target(%d): Received unknown immediate "
+                   "notify status %x\n", vha->vp_idx, status);
+               break;
+       }
+
+       if (send_notify_ack)
+               qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ * This function sends busy to ISP 2xxx or 24xx.
+ */
+static void qlt_send_busy(struct scsi_qla_host *vha,
+       struct atio_from_isp *atio, uint16_t status)
+{
+       struct ctio7_to_24xx *ctio24;
+       struct qla_hw_data *ha = vha->hw;
+       request_t *pkt;
+       struct qla_tgt_sess *sess = NULL;
+
+       sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
+           atio->u.isp24.fcp_hdr.s_id);
+       if (!sess) {
+               qlt_send_term_exchange(vha, NULL, atio, 1);
+               return;
+       }
+       /* Sending marker isn't necessary, since we called from ISR */
+
+       pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
+       if (!pkt) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
+                   "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 = (struct ctio7_to_24xx *)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 qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
+       struct atio_from_isp *atio)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       int rc;
+
+       if (unlikely(tgt == NULL)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
+                   "ATIO pkt, but no tgt (ha %p)", ha);
+               return;
+       }
+       ql_dbg(ql_dbg_tgt, vha, 0xe02c,
+           "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, 0xe02d,
+                   "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)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe058,
+                           "qla_target(%d): ATIO_TYPE7 "
+                           "received with UNKNOWN exchange address, "
+                           "sending QUEUE_FULL\n", vha->vp_idx);
+                       qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
+                       break;
+               }
+               if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
+                       rc = qlt_handle_cmd_for_atio(vha, atio);
+               else
+                       rc = qlt_handle_task_mgmt(vha, atio);
+               if (unlikely(rc != 0)) {
+                       if (rc == -ESRCH) {
+#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
+                               qlt_send_busy(vha, atio, SAM_STAT_BUSY);
+#else
+                               qlt_send_term_exchange(vha, NULL, atio, 1);
+#endif
+                       } else {
+                               if (tgt->tgt_stop) {
+                                       ql_dbg(ql_dbg_tgt, vha, 0xe059,
+                                           "qla_target: Unable to send "
+                                           "command to target for req, "
+                                           "ignoring.\n");
+                               } else {
+                                       ql_dbg(ql_dbg_tgt, vha, 0xe05a,
+                                           "qla_target(%d): Unable to send "
+                                           "command to target, sending BUSY "
+                                           "status.\n", vha->vp_idx);
+                                       qlt_send_busy(vha, atio, SAM_STAT_BUSY);
+                               }
+                       }
+               }
+               break;
+
+       case IMMED_NOTIFY_TYPE:
+       {
+               if (unlikely(atio->u.isp2x.entry_status != 0)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe05b,
+                           "qla_target(%d): Received ATIO packet %x "
+                           "with error status %x\n", vha->vp_idx,
+                           atio->u.raw.entry_type,
+                           atio->u.isp2x.entry_status);
+                       break;
+               }
+               ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
+               qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
+               break;
+       }
+
+       default:
+               ql_dbg(ql_dbg_tgt, vha, 0xe05c,
+                   "qla_target(%d): Received unknown ATIO atio "
+                   "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
+               break;
+       }
+
+       tgt->irq_cmd_count--;
+}
+
+/* ha->hardware_lock supposed to be held on entry */
+/* called via callback from qla2xxx */
+static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+
+       if (unlikely(tgt == NULL)) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe05d,
+                   "qla_target(%d): Response pkt %x received, but no "
+                   "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
+               return;
+       }
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe02f,
+           "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:
+       {
+               struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
+               ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
+                   vha->vp_idx);
+               qlt_do_ctio_completion(vha, entry->handle,
+                   le16_to_cpu(entry->status)|(pkt->entry_status << 16),
+                   entry);
+               break;
+       }
+
+       case ACCEPT_TGT_IO_TYPE:
+       {
+               struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
+               int rc;
+               ql_dbg(ql_dbg_tgt, vha, 0xe031,
+                   "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)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe05e,
+                           "qla_target(%d): ATIO with error "
+                           "status %x received\n", vha->vp_idx,
+                           le16_to_cpu(atio->u.isp2x.status));
+                       break;
+               }
+               ql_dbg(ql_dbg_tgt, vha, 0xe032,
+                   "FCP CDB: 0x%02x, sizeof(cdb): %lu",
+                   atio->u.isp2x.cdb[0], (unsigned long
+                   int)sizeof(atio->u.isp2x.cdb));
+
+               rc = qlt_handle_cmd_for_atio(vha, atio);
+               if (unlikely(rc != 0)) {
+                       if (rc == -ESRCH) {
+#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
+                               qlt_send_busy(vha, atio, 0);
+#else
+                               qlt_send_term_exchange(vha, NULL, atio, 1);
+#endif
+                       } else {
+                               if (tgt->tgt_stop) {
+                                       ql_dbg(ql_dbg_tgt, vha, 0xe05f,
+                                           "qla_target: Unable to send "
+                                           "command to target, sending TERM "
+                                           "EXCHANGE for rsp\n");
+                                       qlt_send_term_exchange(vha, NULL,
+                                           atio, 1);
+                               } else {
+                                       ql_dbg(ql_dbg_tgt, vha, 0xe060,
+                                           "qla_target(%d): Unable to send "
+                                           "command to target, sending BUSY "
+                                           "status\n", vha->vp_idx);
+                                       qlt_send_busy(vha, atio, 0);
+                               }
+                       }
+               }
+       }
+       break;
+
+       case CONTINUE_TGT_IO_TYPE:
+       {
+               struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
+               ql_dbg(ql_dbg_tgt, vha, 0xe033,
+                   "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
+               qlt_do_ctio_completion(vha, entry->handle,
+                   le16_to_cpu(entry->status)|(pkt->entry_status << 16),
+                   entry);
+               break;
+       }
+
+       case CTIO_A64_TYPE:
+       {
+               struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
+               ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
+                   vha->vp_idx);
+               qlt_do_ctio_completion(vha, entry->handle,
+                   le16_to_cpu(entry->status)|(pkt->entry_status << 16),
+                   entry);
+               break;
+       }
+
+       case IMMED_NOTIFY_TYPE:
+               ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
+               qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
+               break;
+
+       case NOTIFY_ACK_TYPE:
+               if (tgt->notify_ack_expected > 0) {
+                       struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
+                       ql_dbg(ql_dbg_tgt, vha, 0xe036,
+                           "NOTIFY_ACK seq %08x status %x\n",
+                           le16_to_cpu(entry->u.isp2x.seq_id),
+                           le16_to_cpu(entry->u.isp2x.status));
+                       tgt->notify_ack_expected--;
+                       if (entry->u.isp2x.status !=
+                           __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
+                               ql_dbg(ql_dbg_tgt, vha, 0xe061,
+                                   "qla_target(%d): NOTIFY_ACK "
+                                   "failed %x\n", vha->vp_idx,
+                                   le16_to_cpu(entry->u.isp2x.status));
+                       }
+               } else {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe062,
+                           "qla_target(%d): Unexpected NOTIFY_ACK received\n",
+                           vha->vp_idx);
+               }
+               break;
+
+       case ABTS_RECV_24XX:
+               ql_dbg(ql_dbg_tgt, vha, 0xe037,
+                   "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
+               qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
+               break;
+
+       case ABTS_RESP_24XX:
+               if (tgt->abts_resp_expected > 0) {
+                       struct abts_resp_from_24xx_fw *entry =
+                               (struct abts_resp_from_24xx_fw *)pkt;
+                       ql_dbg(ql_dbg_tgt, vha, 0xe038,
+                           "ABTS_RESP_24XX: compl_status %x\n",
+                           entry->compl_status);
+                       tgt->abts_resp_expected--;
+                       if (le16_to_cpu(entry->compl_status) !=
+                           ABTS_RESP_COMPL_SUCCESS) {
+                               if ((entry->error_subcode1 == 0x1E) &&
+                                   (entry->error_subcode2 == 0)) {
+                                       /*
+                                        * We've got a race here: aborted
+                                        * exchange not terminated, i.e.
+                                        * response for the aborted command was
+                                        * sent between the abort request was
+                                        * received and processed.
+                                        * Unfortunately, the firmware has a
+                                        * silly requirement that all aborted
+                                        * exchanges must be explicitely
+                                        * terminated, otherwise it refuses to
+                                        * send responses for the abort
+                                        * requests. So, we have to
+                                        * (re)terminate the exchange and retry
+                                        * the abort response.
+                                        */
+                                       qlt_24xx_retry_term_exchange(vha,
+                                           entry);
+                               } else
+                                       ql_dbg(ql_dbg_tgt, vha, 0xe063,
+                                           "qla_target(%d): ABTS_RESP_24XX "
+                                           "failed %x (subcode %x:%x)",
+                                           vha->vp_idx, entry->compl_status,
+                                           entry->error_subcode1,
+                                           entry->error_subcode2);
+                       }
+               } else {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe064,
+                           "qla_target(%d): Unexpected ABTS_RESP_24XX "
+                           "received\n", vha->vp_idx);
+               }
+               break;
+
+       default:
+               ql_dbg(ql_dbg_tgt, vha, 0xe065,
+                   "qla_target(%d): Received unknown response pkt "
+                   "type %x\n", vha->vp_idx, pkt->entry_type);
+               break;
+       }
+
+       tgt->irq_cmd_count--;
+}
+
+/*
+ * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
+ */
+void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
+       uint16_t *mailbox)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       int reason_code;
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe039,
+           "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.tgt_ops)
+               return;
+
+       if (unlikely(tgt == NULL)) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe03a,
+                   "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
+               return;
+       }
+
+       if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
+           IS_QLA2100(ha))
+               return;
+       /*
+        * In tgt_stop mode we also should allow all requests to pass.
+        * Otherwise, some commands can stuck.
+        */
+
+       tgt->irq_cmd_count++;
+
+       switch (code) {
+       case MBA_RESET:                 /* Reset */
+       case MBA_SYSTEM_ERR:            /* System Error */
+       case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
+       case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
+                   "qla_target(%d): System error async event %#x "
+                   "occured", vha->vp_idx, code);
+               break;
+       case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
+               set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+               break;
+
+       case MBA_LOOP_UP:
+       {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
+                   "qla_target(%d): Async LOOP_UP 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) {
+                       qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
+                           0, 0, 0, 0, 0, 0);
+                       tgt->link_reinit_iocb_pending = 0;
+               }
+               break;
+       }
+
+       case MBA_LIP_OCCURRED:
+       case MBA_LOOP_DOWN:
+       case MBA_LIP_RESET:
+       case MBA_RSCN_UPDATE:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
+                   "qla_target(%d): Async event %#x 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, 0xf03d,
+                   "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, 0xf03e,
+                           "Async MB 2: Got PLOGI Complete\n");
+               else if (reason_code == 0x7)
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
+                           "Async MB 2: Port Logged Out\n");
+               break;
+
+       default:
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
+                   "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 *qlt_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) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
+                   "qla_target(%d): Allocation of tmp FC port failed",
+                   vha->vp_idx);
+               return NULL;
+       }
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
+
+       fcport->loop_id = loop_id;
+
+       rc = qla2x00_get_port_database(vha, fcport, 0);
+       if (rc != QLA_SUCCESS) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
+                   "qla_target(%d): Failed to retrieve fcport "
+                   "information -- get_port_database() returned %x "
+                   "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
+               kfree(fcport);
+               return NULL;
+       }
+
+       return fcport;
+}
+
+/* Must be called under tgt_mutex */
+static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
+       uint8_t *s_id)
+{
+       struct qla_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->tgt.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, 0xf042,
+                           "Unable to find initiator with S_ID %x:%x:%x",
+                           s_id[0], s_id[1], s_id[2]);
+               } else
+                       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
+                           "qla_target(%d): Unable to find "
+                           "initiator with S_ID %x:%x:%x",
+                           vha->vp_idx, s_id[0], s_id[1],
+                           s_id[2]);
+               return NULL;
+       }
+
+       fcport = qlt_get_port_database(vha, loop_id);
+       if (!fcport)
+               return NULL;
+
+       if (global_resets !=
+           atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
+               ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
+                   "qla_target(%d): global reset during session discovery "
+                   "(counter was %d, new %d), retrying", vha->vp_idx,
+                   global_resets,
+                   atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
+               goto retry;
+       }
+
+       sess = qlt_create_sess(vha, fcport, true);
+
+       kfree(fcport);
+       return sess;
+}
+
+static void qlt_abort_work(struct qla_tgt *tgt,
+       struct qla_tgt_sess_work_param *prm)
+{
+       struct scsi_qla_host *vha = tgt->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess = NULL;
+       unsigned long flags;
+       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.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.tgt_mutex);
+               sess = qlt_make_local_sess(vha, s_id);
+               /* sess has got an extra creation ref */
+               mutex_unlock(&ha->tgt.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 = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
+       if (rc != 0)
+               goto out_term;
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       ha->tgt.tgt_ops->put_sess(sess);
+       return;
+
+out_term:
+       qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+       if (sess)
+               ha->tgt.tgt_ops->put_sess(sess);
+}
+
+static void qlt_tmr_work(struct qla_tgt *tgt,
+       struct qla_tgt_sess_work_param *prm)
+{
+       struct atio_from_isp *a = &prm->tm_iocb2;
+       struct scsi_qla_host *vha = tgt->vha;
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt_sess *sess = NULL;
+       unsigned long flags;
+       uint8_t *s_id = NULL; /* to hide compiler warnings */
+       int rc;
+       uint32_t lun, unpacked_lun;
+       int 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.tgt_ops->find_sess_by_s_id(vha, s_id);
+       if (!sess) {
+               spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+               mutex_lock(&ha->tgt.tgt_mutex);
+               sess = qlt_make_local_sess(vha, s_id);
+               /* sess has got an extra creation ref */
+               mutex_unlock(&ha->tgt.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 = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
+       if (rc != 0)
+               goto out_term;
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       ha->tgt.tgt_ops->put_sess(sess);
+       return;
+
+out_term:
+       qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+       if (sess)
+               ha->tgt.tgt_ops->put_sess(sess);
+}
+
+static void qlt_sess_work_fn(struct work_struct *work)
+{
+       struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
+       struct scsi_qla_host *vha = tgt->vha;
+       unsigned long flags;
+
+       ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
+
+       spin_lock_irqsave(&tgt->sess_work_lock, flags);
+       while (!list_empty(&tgt->sess_works_list)) {
+               struct qla_tgt_sess_work_param *prm = list_entry(
+                   tgt->sess_works_list.next, typeof(*prm),
+                   sess_works_list_entry);
+
+               /*
+                * This work can be scheduled on several CPUs at time, so we
+                * must delete the entry to eliminate double processing
+                */
+               list_del(&prm->sess_works_list_entry);
+
+               spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+
+               switch (prm->type) {
+               case QLA_TGT_SESS_WORK_ABORT:
+                       qlt_abort_work(tgt, prm);
+                       break;
+               case QLA_TGT_SESS_WORK_TM:
+                       qlt_tmr_work(tgt, prm);
+                       break;
+               default:
+                       BUG_ON(1);
+                       break;
+               }
+
+               spin_lock_irqsave(&tgt->sess_work_lock, flags);
+
+               kfree(prm);
+       }
+       spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
+}
+
+/* Must be called under tgt_host_action_mutex */
+int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
+{
+       struct qla_tgt *tgt;
+
+       if (!QLA_TGT_MODE_ENABLED())
+               return 0;
+
+       ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
+           "Registering target for host %ld(%p)", base_vha->host_no, ha);
+
+       BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
+
+       tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
+       if (!tgt) {
+               ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
+                   "Unable to allocate struct qla_tgt\n");
+               return -ENOMEM;
+       }
+
+       if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
+               base_vha->host->hostt->supported_mode |= MODE_TARGET;
+
+       tgt->ha = ha;
+       tgt->vha = base_vha;
+       init_waitqueue_head(&tgt->waitQ);
+       INIT_LIST_HEAD(&tgt->sess_list);
+       INIT_LIST_HEAD(&tgt->del_sess_list);
+       INIT_DELAYED_WORK(&tgt->sess_del_work,
+               (void (*)(struct work_struct *))qlt_del_sess_work_fn);
+       spin_lock_init(&tgt->sess_work_lock);
+       INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
+       INIT_LIST_HEAD(&tgt->sess_works_list);
+       spin_lock_init(&tgt->srr_lock);
+       INIT_LIST_HEAD(&tgt->srr_ctio_list);
+       INIT_LIST_HEAD(&tgt->srr_imm_list);
+       INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
+       atomic_set(&tgt->tgt_global_resets_count, 0);
+
+       ha->tgt.qla_tgt = tgt;
+
+       ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
+               "qla_target(%d): using 64 Bit PCI addressing",
+               base_vha->vp_idx);
+       tgt->tgt_enable_64bit_addr = 1;
+       /* 3 is reserved */
+       tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
+       tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
+       tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
+
+       mutex_lock(&qla_tgt_mutex);
+       list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
+       mutex_unlock(&qla_tgt_mutex);
+
+       return 0;
+}
+
+/* Must be called under tgt_host_action_mutex */
+int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
+{
+       if (!ha->tgt.qla_tgt)
+               return 0;
+
+       mutex_lock(&qla_tgt_mutex);
+       list_del(&ha->tgt.qla_tgt->tgt_list_entry);
+       mutex_unlock(&qla_tgt_mutex);
+
+       ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
+           vha->host_no, ha);
+       qlt_release(ha->tgt.qla_tgt);
+
+       return 0;
+}
+
+static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
+       unsigned char *b)
+{
+       int i;
+
+       pr_debug("qla2xxx HW vha->node_name: ");
+       for (i = 0; i < WWN_SIZE; i++)
+               pr_debug("%02x ", vha->node_name[i]);
+       pr_debug("\n");
+       pr_debug("qla2xxx HW vha->port_name: ");
+       for (i = 0; i < WWN_SIZE; i++)
+               pr_debug("%02x ", vha->port_name[i]);
+       pr_debug("\n");
+
+       pr_debug("qla2xxx passed configfs WWPN: ");
+       put_unaligned_be64(wwpn, b);
+       for (i = 0; i < WWN_SIZE; i++)
+               pr_debug("%02x ", b[i]);
+       pr_debug("\n");
+}
+
+/**
+ * qla_tgt_lport_register - register lport with external module
+ *
+ * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
+ * @wwpn: Passwd FC target WWPN
+ * @callback:  lport initialization callback for tcm_qla2xxx code
+ * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
+ */
+int qlt_lport_register(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[WWN_SIZE];
+
+       mutex_lock(&qla_tgt_mutex);
+       list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
+               vha = tgt->vha;
+               ha = vha->hw;
+
+               host = vha->host;
+               if (!host)
+                       continue;
+
+               if (ha->tgt.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)) {
+                       ql_dbg(ql_dbg_tgt, vha, 0xe068,
+                           "Unable to scsi_host_get() for"
+                           " qla2xxx scsi_host\n");
+                       continue;
+               }
+               qlt_lport_dump(vha, wwpn, b);
+
+               if (memcmp(vha->port_name, b, WWN_SIZE)) {
+                       scsi_host_put(host);
+                       continue;
+               }
+               /*
+                * Setup passed parameters ahead of invoking callback
+                */
+               ha->tgt.tgt_ops = qla_tgt_ops;
+               ha->tgt.target_lport_ptr = target_lport_ptr;
+               rc = (*callback)(vha);
+               if (rc != 0) {
+                       ha->tgt.tgt_ops = NULL;
+                       ha->tgt.target_lport_ptr = NULL;
+               }
+               mutex_unlock(&qla_tgt_mutex);
+               return rc;
+       }
+       mutex_unlock(&qla_tgt_mutex);
+
+       return -ENODEV;
+}
+EXPORT_SYMBOL(qlt_lport_register);
+
+/**
+ * qla_tgt_lport_deregister - Degister lport
+ *
+ * @vha:  Registered scsi_qla_host pointer
+ */
+void qlt_lport_deregister(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct Scsi_Host *sh = vha->host;
+       /*
+        * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
+        */
+       ha->tgt.target_lport_ptr = NULL;
+       ha->tgt.tgt_ops = NULL;
+       /*
+        * Release the Scsi_Host reference for the underlying qla2xxx host
+        */
+       scsi_host_put(sh);
+}
+EXPORT_SYMBOL(qlt_lport_deregister);
+
+/* Must be called under HW lock */
+void qlt_set_mode(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       switch (ql2x_ini_mode) {
+       case QLA2XXX_INI_MODE_DISABLED:
+       case QLA2XXX_INI_MODE_EXCLUSIVE:
+               vha->host->active_mode = MODE_TARGET;
+               break;
+       case QLA2XXX_INI_MODE_ENABLED:
+               vha->host->active_mode |= MODE_TARGET;
+               break;
+       default:
+               break;
+       }
+
+       if (ha->tgt.ini_mode_force_reverse)
+               qla_reverse_ini_mode(vha);
+}
+
+/* Must be called under HW lock */
+void qlt_clear_mode(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       switch (ql2x_ini_mode) {
+       case QLA2XXX_INI_MODE_DISABLED:
+               vha->host->active_mode = MODE_UNKNOWN;
+               break;
+       case QLA2XXX_INI_MODE_EXCLUSIVE:
+               vha->host->active_mode = MODE_INITIATOR;
+               break;
+       case QLA2XXX_INI_MODE_ENABLED:
+               vha->host->active_mode &= ~MODE_TARGET;
+               break;
+       default:
+               break;
+       }
+
+       if (ha->tgt.ini_mode_force_reverse)
+               qla_reverse_ini_mode(vha);
+}
+
+/*
+ * qla_tgt_enable_vha - NO LOCK HELD
+ *
+ * host_reset, bring up w/ Target Mode Enabled
+ */
+void
+qlt_enable_vha(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       unsigned long flags;
+
+       if (!tgt) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe069,
+                   "Unable to locate qla_tgt pointer from"
+                   " struct qla_hw_data\n");
+               dump_stack();
+               return;
+       }
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       tgt->tgt_stopped = 0;
+       qlt_set_mode(vha);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+       qla2xxx_wake_dpc(vha);
+       qla2x00_wait_for_hba_online(vha);
+}
+EXPORT_SYMBOL(qlt_enable_vha);
+
+/*
+ * qla_tgt_disable_vha - NO LOCK HELD
+ *
+ * Disable Target Mode and reset the adapter
+ */
+void
+qlt_disable_vha(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct qla_tgt *tgt = ha->tgt.qla_tgt;
+       unsigned long flags;
+
+       if (!tgt) {
+               ql_dbg(ql_dbg_tgt, vha, 0xe06a,
+                   "Unable to locate qla_tgt pointer from"
+                   " struct qla_hw_data\n");
+               dump_stack();
+               return;
+       }
+
+       spin_lock_irqsave(&ha->hardware_lock, flags);
+       qlt_clear_mode(vha);
+       spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+       set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+       qla2xxx_wake_dpc(vha);
+       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
+qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
+{
+       if (!qla_tgt_mode_enabled(vha))
+               return;
+
+       mutex_init(&ha->tgt.tgt_mutex);
+       mutex_init(&ha->tgt.tgt_host_action_mutex);
+
+       qlt_clear_mode(vha);
+
+       /*
+        * NOTE: Currently the value is kept the same for <24xx and
+        * >=24xx ISPs. If it is necessary to change it,
+        * the check should be added for specific ISPs,
+        * assigning the value appropriately.
+        */
+       ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
+}
+
+void
+qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
+{
+       /*
+        * FC-4 Feature bit 0 indicates target functionality to the name server.
+        */
+       if (qla_tgt_mode_enabled(vha)) {
+               if (qla_ini_mode_enabled(vha))
+                       ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
+               else
+                       ct_req->req.rff_id.fc4_feature = BIT_0;
+       } else if (qla_ini_mode_enabled(vha)) {
+               ct_req->req.rff_id.fc4_feature = BIT_1;
+       }
+}
+
+/*
+ * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
+ * @ha: HA context
+ *
+ * Beginning of ATIO ring has initialization control block already built
+ * by nvram config routine.
+ *
+ * Returns 0 on success.
+ */
+void
+qlt_init_atio_q_entries(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       uint16_t cnt;
+       struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
+
+       if (!qla_tgt_mode_enabled(vha))
+               return;
+
+       for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
+               pkt->u.raw.signature = ATIO_PROCESSED;
+               pkt++;
+       }
+
+}
+
+/*
+ * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
+ * @ha: SCSI driver HA context
+ */
+void
+qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
+{
+       struct qla_hw_data *ha = vha->hw;
+       struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+       struct atio_from_isp *pkt;
+       int cnt, i;
+
+       if (!vha->flags.online)
+               return;
+
+       while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
+               pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
+               cnt = pkt->u.raw.entry_count;
+
+               qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
+
+               for (i = 0; i < cnt; i++) {
+                       ha->tgt.atio_ring_index++;
+                       if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
+                               ha->tgt.atio_ring_index = 0;
+                               ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
+                       } else
+                               ha->tgt.atio_ring_ptr++;
+
+                       pkt->u.raw.signature = ATIO_PROCESSED;
+                       pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
+               }
+               wmb();
+       }
+
+       /* Adjust ring index */
+       WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
+}
+
+void
+qlt_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(&reg->isp25mq.atio_q_in, 0);
+               WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
+               RD_REG_DWORD(&reg->isp25mq.atio_q_out);
+#endif
+       } else {
+               /* Setup APTIO registers for target mode */
+               WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
+               WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
+               RD_REG_DWORD(&reg->isp24.atio_q_out);
+       }
+}
+
+void
+qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       if (qla_tgt_mode_enabled(vha)) {
+               if (!ha->tgt.saved_set) {
+                       /* We save only once */
+                       ha->tgt.saved_exchange_count = nv->exchange_count;
+                       ha->tgt.saved_firmware_options_1 =
+                           nv->firmware_options_1;
+                       ha->tgt.saved_firmware_options_2 =
+                           nv->firmware_options_2;
+                       ha->tgt.saved_firmware_options_3 =
+                           nv->firmware_options_3;
+                       ha->tgt.saved_set = 1;
+               }
+
+               nv->exchange_count = __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->tgt.saved_set) {
+                       nv->exchange_count = ha->tgt.saved_exchange_count;
+                       nv->firmware_options_1 =
+                           ha->tgt.saved_firmware_options_1;
+                       nv->firmware_options_2 =
+                           ha->tgt.saved_firmware_options_2;
+                       nv->firmware_options_3 =
+                           ha->tgt.saved_firmware_options_3;
+               }
+               return;
+       }
+
+       /* out-of-order frames reassembly */
+       nv->firmware_options_3 |= BIT_6|BIT_9;
+
+       if (ha->tgt.enable_class_2) {
+               if (vha->flags.init_done)
+                       fc_host_supported_classes(vha->host) =
+                               FC_COS_CLASS2 | FC_COS_CLASS3;
+
+               nv->firmware_options_2 |= __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
+qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
+       struct init_cb_24xx *icb)
+{
+       struct qla_hw_data *ha = vha->hw;
+
+       if (ha->tgt.node_name_set) {
+               memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
+               icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
+       }
+}
+
+int
+qlt_24xx_process_response_error(struct scsi_qla_host *vha,
+       struct sts_entry_24xx *pkt)
+{
+       switch (pkt->entry_type) {
+       case ABTS_RECV_24XX:
+       case ABTS_RESP_24XX:
+       case CTIO_TYPE7:
+       case NOTIFY_ACK_TYPE:
+               return 1;
+       default:
+               return 0;
+       }
+}
+
+void
+qlt_modify_vp_config(struct scsi_qla_host *vha,
+       struct vp_config_entry_24xx *vpmod)
+{
+       if (qla_tgt_mode_enabled(vha))
+               vpmod->options_idx1 &= ~BIT_5;
+       /* Disable ini mode, if requested */
+       if (!qla_ini_mode_enabled(vha))
+               vpmod->options_idx1 &= ~BIT_4;
+}
+
+void
+qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
+{
+       if (!QLA_TGT_MODE_ENABLED())
+               return;
+
+       mutex_init(&ha->tgt.tgt_mutex);
+       mutex_init(&ha->tgt.tgt_host_action_mutex);
+       qlt_clear_mode(base_vha);
+}
+
+int
+qlt_mem_alloc(struct qla_hw_data *ha)
+{
+       if (!QLA_TGT_MODE_ENABLED())
+               return 0;
+
+       ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
+           MAX_MULTI_ID_FABRIC, GFP_KERNEL);
+       if (!ha->tgt.tgt_vp_map)
+               return -ENOMEM;
+
+       ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
+           (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
+           &ha->tgt.atio_dma, GFP_KERNEL);
+       if (!ha->tgt.atio_ring) {
+               kfree(ha->tgt.tgt_vp_map);
+               return -ENOMEM;
+       }
+       return 0;
+}
+
+void
+qlt_mem_free(struct qla_hw_data *ha)
+{
+       if (!QLA_TGT_MODE_ENABLED())
+               return;
+
+       if (ha->tgt.atio_ring) {
+               dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
+                   sizeof(struct atio_from_isp), ha->tgt.atio_ring,
+                   ha->tgt.atio_dma);
+       }
+       kfree(ha->tgt.tgt_vp_map);
+}
+
+/* vport_slock to be held by the caller */
+void
+qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
+{
+       if (!QLA_TGT_MODE_ENABLED())
+               return;
+
+       switch (cmd) {
+       case SET_VP_IDX:
+               vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
+               break;
+       case SET_AL_PA:
+               vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
+               break;
+       case RESET_VP_IDX:
+               vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
+               break;
+       case RESET_AL_PA:
+               vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
+               break;
+       }
+}
+
+static int __init qlt_parse_ini_mode(void)
+{
+       if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
+               ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
+       else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
+               ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
+       else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
+               ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
+       else
+               return false;
+
+       return true;
+}
+
+int __init qlt_init(void)
+{
+       int ret;
+
+       if (!qlt_parse_ini_mode()) {
+               ql_log(ql_log_fatal, NULL, 0xe06b,
+                   "qlt_parse_ini_mode() failed\n");
+               return -EINVAL;
+       }
+
+       if (!QLA_TGT_MODE_ENABLED())
+               return 0;
+
+       qla_tgt_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) {
+               ql_log(ql_log_fatal, NULL, 0xe06c,
+                   "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) {
+               ql_log(ql_log_fatal, NULL, 0xe06d,
+                   "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) {
+               ql_log(ql_log_fatal, NULL, 0xe06e,
+                   "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) {
+               ql_log(ql_log_fatal, NULL, 0xe06f,
+                   "alloc_workqueue for qla_tgt_wq failed\n");
+               ret = -ENOMEM;
+               goto out_cmd_mempool;
+       }
+       /*
+        * Return 1 to signal that initiator-mode is being disabled
+        */
+       return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
+
+out_cmd_mempool:
+       mempool_destroy(qla_tgt_mgmt_cmd_mempool);
+out_mgmt_cmd_cachep:
+       kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
+out:
+       kmem_cache_destroy(qla_tgt_cmd_cachep);
+       return ret;
+}
+
+void qlt_exit(void)
+{
+       if (!QLA_TGT_MODE_ENABLED())
+               return;
+
+       destroy_workqueue(qla_tgt_wq);
+       mempool_destroy(qla_tgt_mgmt_cmd_mempool);
+       kmem_cache_destroy(qla_tgt_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 (file)
index 0000000..9ec19bc
--- /dev/null
@@ -0,0 +1,1005 @@
+/*
+ *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
+ *  Copyright (C) 2004 - 2005 Leonid Stoljar
+ *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
+ *  Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ *  Forward port and refactoring to modern qla2xxx and target/configfs
+ *
+ *  Copyright (C) 2010-2011 Nicholas A. Bellinger <nab@kernel.org>
+ *
+ *  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 "CTIO_COMPLETION_HANDLE_MARK not 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.
+ */
+struct imm_ntfy_from_isp {
+       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;
+} __packed;
+#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.
+ */
+struct nack_to_isp {
+       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;
+} __packed;
+#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.
+ */
+struct ctio_to_2xxx {
+       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. */
+} __packed;
+#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 */
+
+struct fcp_hdr {
+       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;
+} __packed;
+
+struct fcp_hdr_le {
+       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;
+} __packed;
+
+#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
+
+struct atio7_fcp_cmnd {
+       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 struct atio7_fcp_cmnd. Size 4
+        * only to make sizeof(struct atio7_fcp_cmnd) be as expected by
+        * BUILD_BUG_ON in qlt_init().
+        */
+       uint8_t  add_cdb[4];
+       /* uint32_t data_length; */
+} __packed;
+
+/*
+ * ISP queue - Accept Target I/O (ATIO) type entry IOCB structure.
+ *             This is sent from the ISP to the target driver.
+ */
+struct atio_from_isp {
+       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
+                       struct fcp_hdr fcp_hdr;
+                       struct atio7_fcp_cmnd 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;
+} __packed;
+
+#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.
+ */
+
+struct ctio7_to_24xx {
+       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;
+                       /* Data segment 0 address. */
+                       uint32_t dseg_0_address[2];
+                       /* Data segment 0 length. */
+                       uint32_t dseg_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;
+} __packed;
+
+/*
+ * ISP queue - CTIO type 7 from ISP 24xx to target driver
+ * returned entry structure.
+ */
+struct ctio7_from_24xx {
+       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];
+} __packed;
+
+/* 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.
+ */
+struct abts_recv_from_24xx {
+       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;
+       struct fcp_hdr_le fcp_hdr_le;
+       uint8_t  reserved_4[16];
+       uint32_t exchange_addr_to_abort;
+} __packed;
+
+#define ABTS_PARAM_ABORT_SEQ           BIT_0
+
+struct ba_acc_le {
+       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;
+} __packed;
+
+struct ba_rjt_le {
+       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;
+} __packed;
+
+/*
+ * 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.
+ */
+struct abts_resp_to_24xx {
+       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;
+       struct fcp_hdr_le fcp_hdr_le;
+       union {
+               struct ba_acc_le ba_acct;
+               struct ba_rjt_le ba_rjt;
+       } __packed payload;
+       uint32_t reserved_4;
+       uint32_t exchange_addr_to_abort;
+} __packed;
+
+/*
+ * 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.
+ */
+struct abts_resp_from_24xx_fw {
+       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;
+       struct fcp_hdr_le 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;
+} __packed;
+
+/********************************************************************\
+ * 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 *);
+       void (*shutdown_sess)(struct qla_tgt_sess *);
+};
+
+int qla2x00_wait_for_hba_online(struct scsi_qla_host *);
+
+#include <target/target_core_base.h>
+
+#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 + target processing */
+#define QLA_TGT_STATE_NEED_DATA                1 /* target needs data to continue */
+#define QLA_TGT_STATE_DATA_IN          2 /* Data arrived + target 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 qlt_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 qlt_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 addr enabled */
+       unsigned int link_reinit_iocb_pending:1;
+
+       /*
+        * 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;
+
+       struct imm_ntfy_from_isp 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];
+
+       /* to save extra sess dereferences */
+       unsigned int conf_compl_supported:1;
+       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;
+
+       struct atio_from_isp 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 {
+               struct abts_recv_from_24xx abts;
+               struct imm_ntfy_from_isp tm_iocb;
+               struct atio_from_isp 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 {
+               struct atio_from_isp atio;
+               struct imm_ntfy_from_isp imm_ntfy;
+               struct abts_recv_from_24xx abts;
+       } __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;
+       struct imm_ntfy_from_isp 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 <linux/version.h>
+
+extern struct qla_tgt_data qla_target;
+/*
+ * Internal function prototypes
+ */
+void qlt_disable_vha(struct scsi_qla_host *);
+
+/*
+ * Function prototypes for qla_target.c logic used by qla2xxx LLD code.
+ */
+extern int qlt_add_target(struct qla_hw_data *, struct scsi_qla_host *);
+extern int qlt_remove_target(struct qla_hw_data *, struct scsi_qla_host *);
+extern int qlt_lport_register(struct qla_tgt_func_tmpl *, u64,
+                       int (*callback)(struct scsi_qla_host *), void *);
+extern void qlt_lport_deregister(struct scsi_qla_host *);
+extern void qlt_unreg_sess(struct qla_tgt_sess *);
+extern void qlt_fc_port_added(struct scsi_qla_host *, fc_port_t *);
+extern void qlt_fc_port_deleted(struct scsi_qla_host *, fc_port_t *);
+extern void qlt_set_mode(struct scsi_qla_host *ha);
+extern void qlt_clear_mode(struct scsi_qla_host *ha);
+extern int __init qlt_init(void);
+extern void qlt_exit(void);
+extern void qlt_update_vp_map(struct scsi_qla_host *, int);
+
+/*
+ * This macro is used during early initializations when host->active_mode
+ * is not set. Right now, ha value is ignored.
+ */
+#define QLA_TGT_MODE_ENABLED() (ql2x_ini_mode != QLA2XXX_INI_MODE_ENABLED)
+
+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 qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *,
+       struct atio_from_isp *);
+extern void qlt_response_pkt_all_vps(struct scsi_qla_host *, response_t *);
+extern int qlt_rdy_to_xfer(struct qla_tgt_cmd *);
+extern int qlt_xmit_response(struct qla_tgt_cmd *, int, uint8_t);
+extern void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *);
+extern void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *);
+extern void qlt_free_cmd(struct qla_tgt_cmd *cmd);
+extern void qlt_ctio_completion(struct scsi_qla_host *, uint32_t);
+extern void qlt_async_event(uint16_t, struct scsi_qla_host *, uint16_t *);
+extern void qlt_enable_vha(struct scsi_qla_host *);
+extern void qlt_vport_create(struct scsi_qla_host *, struct qla_hw_data *);
+extern void qlt_rff_id(struct scsi_qla_host *, struct ct_sns_req *);
+extern void qlt_init_atio_q_entries(struct scsi_qla_host *);
+extern void qlt_24xx_process_atio_queue(struct scsi_qla_host *);
+extern void qlt_24xx_config_rings(struct scsi_qla_host *,
+       device_reg_t __iomem *);
+extern void qlt_24xx_config_nvram_stage1(struct scsi_qla_host *,
+       struct nvram_24xx *);
+extern void qlt_24xx_config_nvram_stage2(struct scsi_qla_host *,
+       struct init_cb_24xx *);
+extern int qlt_24xx_process_response_error(struct scsi_qla_host *,
+       struct sts_entry_24xx *);
+extern void qlt_modify_vp_config(struct scsi_qla_host *,
+       struct vp_config_entry_24xx *);
+extern void qlt_probe_one_stage1(struct scsi_qla_host *, struct qla_hw_data *);
+extern int qlt_mem_alloc(struct qla_hw_data *);
+extern void qlt_mem_free(struct qla_hw_data *);
+extern void qlt_stop_phase1(struct qla_tgt *);
+extern void qlt_stop_phase2(struct qla_tgt *);
+
+#endif /* __QLA_TARGET_H */