[SCSI] qla2xxx: Implementation of bidirectional.

[jejb: merge fix for introduced warning]
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

11 files changed, 656 insertions, 12 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 5ab9530..ff2439b 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1251,6 +1251,31 @@ qla2x00_fw_state_show(struct device *dev, struct device_attribute *attr,
 	    state[1], state[2], state[3], state[4]);
 }
 
+static ssize_t
+qla2x00_diag_requests_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+
+	if (!IS_BIDI_CAPABLE(vha->hw))
+		return snprintf(buf, PAGE_SIZE, "\n");
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", vha->bidi_stats.io_count);
+}
+
+static ssize_t
+qla2x00_diag_megabytes_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+
+	if (!IS_BIDI_CAPABLE(vha->hw))
+		return snprintf(buf, PAGE_SIZE, "\n");
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+	    vha->bidi_stats.transfer_bytes >> 20);
+}
+
 static DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_drvr_version_show, NULL);
 static DEVICE_ATTR(fw_version, S_IRUGO, qla2x00_fw_version_show, NULL);
 static DEVICE_ATTR(serial_num, S_IRUGO, qla2x00_serial_num_show, NULL);
@@ -1289,6 +1314,8 @@ static DEVICE_ATTR(vn_port_mac_address, S_IRUGO,
 static DEVICE_ATTR(fabric_param, S_IRUGO, qla2x00_fabric_param_show, NULL);
 static DEVICE_ATTR(fw_state, S_IRUGO, qla2x00_fw_state_show, NULL);
 static DEVICE_ATTR(thermal_temp, S_IRUGO, qla2x00_thermal_temp_show, NULL);
+static DEVICE_ATTR(diag_requests, S_IRUGO, qla2x00_diag_requests_show, NULL);
+static DEVICE_ATTR(diag_megabytes, S_IRUGO, qla2x00_diag_megabytes_show, NULL);
 
 struct device_attribute *qla2x00_host_attrs[] = {
 	&dev_attr_driver_version,
@@ -1318,6 +1345,8 @@ struct device_attribute *qla2x00_host_attrs[] = {
 	&dev_attr_fw_state,
 	&dev_attr_optrom_gold_fw_version,
 	&dev_attr_thermal_temp,
+	&dev_attr_diag_requests,
+	&dev_attr_diag_megabytes,
 	NULL,
 };
 
diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 462ac70..dac3427 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -1650,6 +1650,186 @@ done:
 }
 
 static int
+qla24xx_process_bidir_cmd(struct fc_bsg_job *bsg_job)
+{
+	struct Scsi_Host *host = bsg_job->shost;
+	scsi_qla_host_t *vha = shost_priv(host);
+	struct qla_hw_data *ha = vha->hw;
+	uint16_t thread_id;
+	uint32_t rval = EXT_STATUS_OK;
+	uint16_t req_sg_cnt = 0;
+	uint16_t rsp_sg_cnt = 0;
+	uint16_t nextlid = 0;
+	uint32_t tot_dsds;
+	srb_t *sp = NULL;
+	uint32_t req_data_len = 0;
+	uint32_t rsp_data_len = 0;
+
+	/* Check the type of the adapter */
+	if (!IS_BIDI_CAPABLE(ha)) {
+		ql_log(ql_log_warn, vha, 0x70a0,
+			"This adapter is not supported\n");
+		rval = EXT_STATUS_NOT_SUPPORTED;
+		goto done;
+	}
+
+	if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
+		test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) ||
+		test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) {
+		rval =  EXT_STATUS_BUSY;
+		goto done;
+	}
+
+	/* Check if host is online */
+	if (!vha->flags.online) {
+		ql_log(ql_log_warn, vha, 0x70a1,
+			"Host is not online\n");
+		rval = EXT_STATUS_DEVICE_OFFLINE;
+		goto done;
+	}
+
+	/* Check if cable is plugged in or not */
+	if (vha->device_flags & DFLG_NO_CABLE) {
+		ql_log(ql_log_warn, vha, 0x70a2,
+			"Cable is unplugged...\n");
+		rval = EXT_STATUS_INVALID_CFG;
+		goto done;
+	}
+
+	/* Check if the switch is connected or not */
+	if (ha->current_topology != ISP_CFG_F) {
+		ql_log(ql_log_warn, vha, 0x70a3,
+			"Host is not connected to the switch\n");
+		rval = EXT_STATUS_INVALID_CFG;
+		goto done;
+	}
+
+	/* Check if operating mode is P2P */
+	if (ha->operating_mode != P2P) {
+		ql_log(ql_log_warn, vha, 0x70a4,
+		    "Host is operating mode is not P2p\n");
+		rval = EXT_STATUS_INVALID_CFG;
+		goto done;
+	}
+
+	thread_id = bsg_job->request->rqst_data.h_vendor.vendor_cmd[1];
+
+	mutex_lock(&ha->selflogin_lock);
+	if (vha->self_login_loop_id == 0) {
+		/* Initialize all required  fields of fcport */
+		vha->bidir_fcport.vha = vha;
+		vha->bidir_fcport.d_id.b.al_pa = vha->d_id.b.al_pa;
+		vha->bidir_fcport.d_id.b.area = vha->d_id.b.area;
+		vha->bidir_fcport.d_id.b.domain = vha->d_id.b.domain;
+		vha->bidir_fcport.loop_id = vha->loop_id;
+
+		if (qla2x00_fabric_login(vha, &(vha->bidir_fcport), &nextlid)) {
+			ql_log(ql_log_warn, vha, 0x70a7,
+			    "Failed to login port %06X for bidirectional IOCB\n",
+			    vha->bidir_fcport.d_id.b24);
+			mutex_unlock(&ha->selflogin_lock);
+			rval = EXT_STATUS_MAILBOX;
+			goto done;
+		}
+		vha->self_login_loop_id = nextlid - 1;
+
+	}
+	/* Assign the self login loop id to fcport */
+	mutex_unlock(&ha->selflogin_lock);
+
+	vha->bidir_fcport.loop_id = vha->self_login_loop_id;
+
+	req_sg_cnt = dma_map_sg(&ha->pdev->dev,
+		bsg_job->request_payload.sg_list,
+		bsg_job->request_payload.sg_cnt,
+		DMA_TO_DEVICE);
+
+	if (!req_sg_cnt) {
+		rval = EXT_STATUS_NO_MEMORY;
+		goto done;
+	}
+
+	rsp_sg_cnt = dma_map_sg(&ha->pdev->dev,
+		bsg_job->reply_payload.sg_list, bsg_job->reply_payload.sg_cnt,
+		DMA_FROM_DEVICE);
+
+	if (!rsp_sg_cnt) {
+		rval = EXT_STATUS_NO_MEMORY;
+		goto done_unmap_req_sg;
+	}
+
+	if ((req_sg_cnt !=  bsg_job->request_payload.sg_cnt) ||
+		(rsp_sg_cnt != bsg_job->reply_payload.sg_cnt)) {
+		ql_dbg(ql_dbg_user, vha, 0x70a9,
+		    "Dma mapping resulted in different sg counts "
+		    "[request_sg_cnt: %x dma_request_sg_cnt: %x reply_sg_cnt: "
+		    "%x dma_reply_sg_cnt: %x]\n",
+		    bsg_job->request_payload.sg_cnt, req_sg_cnt,
+		    bsg_job->reply_payload.sg_cnt, rsp_sg_cnt);
+		rval = EXT_STATUS_NO_MEMORY;
+		goto done_unmap_sg;
+	}
+
+	if (req_data_len != rsp_data_len) {
+		rval = EXT_STATUS_BUSY;
+		ql_log(ql_log_warn, vha, 0x70aa,
+		    "req_data_len != rsp_data_len\n");
+		goto done_unmap_sg;
+	}
+
+	req_data_len = bsg_job->request_payload.payload_len;
+	rsp_data_len = bsg_job->reply_payload.payload_len;
+
+
+	/* Alloc SRB structure */
+	sp = qla2x00_get_sp(vha, &(vha->bidir_fcport), GFP_KERNEL);
+	if (!sp) {
+		ql_dbg(ql_dbg_user, vha, 0x70ac,
+		    "Alloc SRB structure failed\n");
+		rval = EXT_STATUS_NO_MEMORY;
+		goto done_unmap_sg;
+	}
+
+	/*Populate srb->ctx with bidir ctx*/
+	sp->u.bsg_job = bsg_job;
+	sp->free = qla2x00_bsg_sp_free;
+	sp->type = SRB_BIDI_CMD;
+	sp->done = qla2x00_bsg_job_done;
+
+	/* Add the read and write sg count */
+	tot_dsds = rsp_sg_cnt + req_sg_cnt;
+
+	rval = qla2x00_start_bidir(sp, vha, tot_dsds);
+	if (rval != EXT_STATUS_OK)
+		goto done_free_srb;
+	/* the bsg request  will be completed in the interrupt handler */
+	return rval;
+
+done_free_srb:
+	mempool_free(sp, ha->srb_mempool);
+done_unmap_sg:
+	dma_unmap_sg(&ha->pdev->dev,
+	    bsg_job->reply_payload.sg_list,
+	    bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+done_unmap_req_sg:
+	dma_unmap_sg(&ha->pdev->dev,
+	    bsg_job->request_payload.sg_list,
+	    bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
+done:
+
+	/* Return an error vendor specific response
+	 * and complete the bsg request
+	 */
+	bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] = rval;
+	bsg_job->reply_len = sizeof(struct fc_bsg_reply);
+	bsg_job->reply->reply_payload_rcv_len = 0;
+	bsg_job->reply->result = (DID_OK) << 16;
+	bsg_job->job_done(bsg_job);
+	/* Always retrun success, vendor rsp carries correct status */
+	return 0;
+}
+
+static int
 qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
 {
 	switch (bsg_job->request->rqst_data.h_vendor.vendor_cmd[0]) {
@@ -1692,6 +1872,9 @@ qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
 	case QL_VND_READ_I2C:
 		return qla2x00_read_i2c(bsg_job);
 
+	case QL_VND_DIAG_IO_CMD:
+		return qla24xx_process_bidir_cmd(bsg_job);
+
 	default:
 		bsg_job->reply->result = (DID_ERROR << 16);
 		bsg_job->job_done(bsg_job);
diff --git a/drivers/scsi/qla2xxx/qla_bsg.h b/drivers/scsi/qla2xxx/qla_bsg.h
index 1a0ab37..1875ee1 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.h
+++ b/drivers/scsi/qla2xxx/qla_bsg.h
@@ -19,15 +19,31 @@
 #define QL_VND_SET_FRU_VERSION	0x0B
 #define QL_VND_READ_FRU_STATUS	0x0C
 #define QL_VND_WRITE_FRU_STATUS	0x0D
+#define QL_VND_DIAG_IO_CMD	0x0A
 #define QL_VND_WRITE_I2C	0x10
 #define QL_VND_READ_I2C		0x11
 
 /* BSG Vendor specific subcode returns */
 #define EXT_STATUS_OK			0
 #define EXT_STATUS_ERR			1
+#define EXT_STATUS_BUSY			2
 #define EXT_STATUS_INVALID_PARAM	6
+#define EXT_STATUS_DATA_OVERRUN		7
+#define EXT_STATUS_DATA_UNDERRUN	8
 #define EXT_STATUS_MAILBOX		11
 #define EXT_STATUS_NO_MEMORY		17
+#define EXT_STATUS_DEVICE_OFFLINE	22
+
+/*
+ * To support bidirectional iocb
+ * BSG Vendor specific returns
+ */
+#define EXT_STATUS_NOT_SUPPORTED	27
+#define EXT_STATUS_INVALID_CFG		28
+#define EXT_STATUS_DMA_ERR		29
+#define EXT_STATUS_TIMEOUT		30
+#define EXT_STATUS_THREAD_FAILED	31
+#define EXT_STATUS_DATA_CMP_FAILED	32
 
 /* BSG definations for interpreting CommandSent field */
 #define INT_DEF_LB_LOOPBACK_CMD         0
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index 0c4fd2c..156f534 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -15,17 +15,20 @@
  * | Mailbox commands             |       0x1140       | 0x111a-0x111b  |
  * |                              |                    | 0x112c-0x112e  |
  * |                              |                    | 0x113a         |
- * | Device Discovery             |       0x2086       | 0x2020-0x2022  |
+ * | Device Discovery             |       0x2087       | 0x2020-0x2022  |
  * | Queue Command and IO tracing |       0x3030       | 0x3006,0x3008  |
  * |                              |                    | 0x302d-0x302e  |
  * | DPC Thread                   |       0x401c       | 0x4002,0x4013  |
  * | Async Events                 |       0x505f       | 0x502b-0x502f  |
  * |                              |                    | 0x5047,0x5052  |
  * | Timer Routines               |       0x6011       |                |
- * | User Space Interactions      |       0x709f       | 0x7018,0x702e, |
+ * | User Space Interactions      |       0x70bb       | 0x7018,0x702e, |
  * |                              |                    | 0x7039,0x7045, |
  * |                              |                    | 0x7073-0x7075, |
- * |                              |                    | 0x708c         |
+ * |                              |                    | 0x708c,        |
+ * |                              |                    | 0x70a5,0x70a6, |
+ * |                              |                    | 0x70a8,0x70ab, |
+ * |                              |                    | 0x70ad-0x70ae  |
  * | Task Management              |       0x803c       | 0x8025-0x8026  |
  * |                              |                    | 0x800b,0x8039  |
  * | AER/EEH                      |       0x9011       |		|
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 28c0b35..7ff92ce 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -260,6 +260,7 @@ struct srb_iocb {
 #define SRB_ADISC_CMD	6
 #define SRB_TM_CMD	7
 #define SRB_SCSI_CMD	8
+#define SRB_BIDI_CMD	9
 
 typedef struct srb {
 	atomic_t ref_count;
@@ -1510,6 +1511,13 @@ typedef struct {
 #define CS_RETRY		0x82	/* Driver defined */
 #define CS_LOOP_DOWN_ABORT	0x83	/* Driver defined */
 
+#define CS_BIDIR_RD_OVERRUN			0x700
+#define CS_BIDIR_RD_WR_OVERRUN			0x707
+#define CS_BIDIR_RD_OVERRUN_WR_UNDERRUN		0x715
+#define CS_BIDIR_RD_UNDERRUN			0x1500
+#define CS_BIDIR_RD_UNDERRUN_WR_OVERRUN		0x1507
+#define CS_BIDIR_RD_WR_UNDERRUN			0x1515
+#define CS_BIDIR_DMA				0x200
 /*
  * Status entry status flags
  */
@@ -2374,6 +2382,11 @@ struct qla_statistics {
 	uint64_t output_bytes;
 };
 
+struct bidi_statistics {
+	unsigned long long io_count;
+	unsigned long long transfer_bytes;
+};
+
 /* Multi queue support */
 #define MBC_INITIALIZE_MULTIQ 0x1f
 #define QLA_QUE_PAGE 0X1000
@@ -2671,6 +2684,7 @@ struct qla_hw_data {
 #define HAS_EXTENDED_IDS(ha)    ((ha)->device_type & DT_EXTENDED_IDS)
 #define IS_CT6_SUPPORTED(ha)	((ha)->device_type & DT_CT6_SUPPORTED)
 #define IS_MQUE_CAPABLE(ha)	((ha)->mqenable || IS_QLA83XX(ha))
+#define IS_BIDI_CAPABLE(ha)	((IS_QLA25XX(ha) || IS_QLA2031(ha)))
 
 	/* HBA serial number */
 	uint8_t		serial0;
@@ -2754,6 +2768,7 @@ struct qla_hw_data {
 	struct completion mbx_intr_comp;  /* Used for completion notification */
 	struct completion dcbx_comp;	/* For set port config notification */
 	int notify_dcbx_comp;
+	struct mutex selflogin_lock;
 
 	/* Basic firmware related information. */
 	uint16_t	fw_major_version;
@@ -2987,6 +3002,13 @@ typedef struct scsi_qla_host {
 
 	/* ISP configuration data. */
 	uint16_t	loop_id;		/* Host adapter loop id */
+	uint16_t        self_login_loop_id;     /* host adapter loop id
+						 * get it on self login
+						 */
+	fc_port_t       bidir_fcport;		/* fcport used for bidir cmnds
+						 * no need of allocating it for
+						 * each command
+						 */
 
 	port_id_t	d_id;			/* Host adapter port id */
 	uint8_t		marker_needed;
@@ -3040,6 +3062,7 @@ typedef struct scsi_qla_host {
 	int		seconds_since_last_heartbeat;
 	struct fc_host_statistics fc_host_stat;
 	struct qla_statistics qla_stats;
+	struct bidi_statistics bidi_stats;
 
 	atomic_t	vref_count;
 } scsi_qla_host_t;
diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h
index 980b5a7..a678ed5 100644
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -381,6 +381,44 @@ struct init_cb_24xx {
 /*
  * ISP queue - command entry structure definition.
  */
+#define COMMAND_BIDIRECTIONAL 0x75
+struct cmd_bidir {
+	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 handle. */
+
+	uint16_t nport_handle;		/* N_PORT hanlde. */
+
+	uint16_t timeout;		/* Commnad timeout. */
+
+	uint16_t wr_dseg_count;		/* Write Data segment count. */
+	uint16_t rd_dseg_count;		/* Read Data segment count. */
+
+	struct scsi_lun lun;		/* FCP LUN (BE). */
+
+	uint16_t control_flags;		/* Control flags. */
+#define BD_WRAP_BACK			BIT_3
+#define BD_READ_DATA			BIT_1
+#define BD_WRITE_DATA			BIT_0
+
+	uint16_t fcp_cmnd_dseg_len;		/* Data segment length. */
+	uint32_t fcp_cmnd_dseg_address[2];	/* Data segment address. */
+
+	uint16_t reserved[2];			/* Reserved */
+
+	uint32_t rd_byte_count;			/* Total Byte count Read. */
+	uint32_t wr_byte_count;			/* Total Byte count write. */
+
+	uint8_t port_id[3];			/* PortID of destination port.*/
+	uint8_t vp_index;
+
+	uint32_t fcp_data_dseg_address[2];	/* Data segment address. */
+	uint16_t fcp_data_dseg_len;		/* Data segment length. */
+};
+
 #define COMMAND_TYPE_6	0x48		/* Command Type 6 entry */
 struct cmd_type_6 {
 	uint8_t entry_type;		/* Entry type. */
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 9eacd2d..d7588ad 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -188,6 +188,8 @@ extern int qla2x00_start_sp(srb_t *);
 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 int qla2x00_start_bidir(srb_t *, struct scsi_qla_host *, uint32_t);
+extern unsigned long qla2x00_get_async_timeout(struct scsi_qla_host *);
 
 extern void *qla2x00_alloc_iocbs(scsi_qla_host_t *, srb_t *);
 extern int qla2x00_issue_marker(scsi_qla_host_t *, int);
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 2900523..fa39411 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -77,7 +77,7 @@ qla2x00_sp_free(void *data, void *ptr)
 
 /* Asynchronous Login/Logout Routines -------------------------------------- */
 
-static inline unsigned long
+unsigned long
 qla2x00_get_async_timeout(struct scsi_qla_host *vha)
 {
 	unsigned long tmo;
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 23e8375..74c69ba 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -2665,3 +2665,201 @@ done:
 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 	return rval;
 }
+
+static void
+qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
+				struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
+{
+	uint16_t avail_dsds;
+	uint32_t *cur_dsd;
+	uint32_t req_data_len = 0;
+	uint32_t rsp_data_len = 0;
+	struct scatterlist *sg;
+	int index;
+	int entry_count = 1;
+	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
+
+	/*Update entry type to indicate bidir command */
+	*((uint32_t *)(&cmd_pkt->entry_type)) =
+		__constant_cpu_to_le32(COMMAND_BIDIRECTIONAL);
+
+	/* Set the transfer direction, in this set both flags
+	 * Also set the BD_WRAP_BACK flag, firmware will take care
+	 * assigning DID=SID for outgoing pkts.
+	 */
+	cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
+	cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
+	cmd_pkt->control_flags =
+			__constant_cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
+							BD_WRAP_BACK);
+
+	req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
+	cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
+	cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
+	cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);
+
+	vha->bidi_stats.transfer_bytes += req_data_len;
+	vha->bidi_stats.io_count++;
+
+	/* Only one dsd is available for bidirectional IOCB, remaining dsds
+	 * are bundled in continuation iocb
+	 */
+	avail_dsds = 1;
+	cur_dsd = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
+
+	index = 0;
+
+	for_each_sg(bsg_job->request_payload.sg_list, sg,
+				bsg_job->request_payload.sg_cnt, index) {
+		dma_addr_t sle_dma;
+		cont_a64_entry_t *cont_pkt;
+
+		/* Allocate additional continuation packets */
+		if (avail_dsds == 0) {
+			/* Continuation type 1 IOCB can accomodate
+			 * 5 DSDS
+			 */
+			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
+			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
+			avail_dsds = 5;
+			entry_count++;
+		}
+		sle_dma = sg_dma_address(sg);
+		*cur_dsd++   = cpu_to_le32(LSD(sle_dma));
+		*cur_dsd++   = cpu_to_le32(MSD(sle_dma));
+		*cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
+		avail_dsds--;
+	}
+	/* For read request DSD will always goes to continuation IOCB
+	 * and follow the write DSD. If there is room on the current IOCB
+	 * then it is added to that IOCB else new continuation IOCB is
+	 * allocated.
+	 */
+	for_each_sg(bsg_job->reply_payload.sg_list, sg,
+				bsg_job->reply_payload.sg_cnt, index) {
+		dma_addr_t sle_dma;
+		cont_a64_entry_t *cont_pkt;
+
+		/* Allocate additional continuation packets */
+		if (avail_dsds == 0) {
+			/* Continuation type 1 IOCB can accomodate
+			 * 5 DSDS
+			 */
+			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
+			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
+			avail_dsds = 5;
+			entry_count++;
+		}
+		sle_dma = sg_dma_address(sg);
+		*cur_dsd++   = cpu_to_le32(LSD(sle_dma));
+		*cur_dsd++   = cpu_to_le32(MSD(sle_dma));
+		*cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
+		avail_dsds--;
+	}
+	/* This value should be same as number of IOCB required for this cmd */
+	cmd_pkt->entry_count = entry_count;
+}
+
+int
+qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
+{
+
+	struct qla_hw_data *ha = vha->hw;
+	unsigned long flags;
+	uint32_t handle;
+	uint32_t index;
+	uint16_t req_cnt;
+	uint16_t cnt;
+	uint32_t *clr_ptr;
+	struct cmd_bidir *cmd_pkt = NULL;
+	struct rsp_que *rsp;
+	struct req_que *req;
+	int rval = EXT_STATUS_OK;
+	device_reg_t __iomem *reg = ISP_QUE_REG(ha, vha->req->id);
+
+	rval = QLA_SUCCESS;
+
+	rsp = ha->rsp_q_map[0];
+	req = vha->req;
+
+	/* Send marker if required */
+	if (vha->marker_needed != 0) {
+		if (qla2x00_marker(vha, req,
+			rsp, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
+			return EXT_STATUS_MAILBOX;
+		vha->marker_needed = 0;
+	}
+
+	/* Acquire ring specific lock */
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+
+	/* Check for room in outstanding command list. */
+	handle = req->current_outstanding_cmd;
+	for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
+		handle++;
+	if (handle == MAX_OUTSTANDING_COMMANDS)
+		handle = 1;
+	if (!req->outstanding_cmds[handle])
+		break;
+	}
+
+	if (index == MAX_OUTSTANDING_COMMANDS) {
+		rval = EXT_STATUS_BUSY;
+		goto queuing_error;
+	}
+
+	/* Calculate number of IOCB required */
+	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
+
+	/* Check for room on request queue. */
+	if (req->cnt < req_cnt + 2) {
+		if (ha->mqenable)
+			cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
+		else if (IS_QLA82XX(ha))
+			cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
+		else if (IS_FWI2_CAPABLE(ha))
+			cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
+		else
+			cnt = qla2x00_debounce_register(
+					ISP_REQ_Q_OUT(ha, &reg->isp));
+
+		if  (req->ring_index < cnt)
+			req->cnt = cnt - req->ring_index;
+		else
+			req->cnt = req->length -
+				(req->ring_index - cnt);
+	}
+	if (req->cnt < req_cnt + 2) {
+		rval = EXT_STATUS_BUSY;
+		goto queuing_error;
+	}
+
+	cmd_pkt = (struct cmd_bidir *)req->ring_ptr;
+	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
+
+	/* Zero out remaining portion of packet. */
+	/* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
+	clr_ptr = (uint32_t *)cmd_pkt + 2;
+	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
+
+	/* Set NPORT-ID  (of vha)*/
+	cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
+	cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
+	cmd_pkt->port_id[1] = vha->d_id.b.area;
+	cmd_pkt->port_id[2] = vha->d_id.b.domain;
+
+	qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
+	cmd_pkt->entry_status = (uint8_t) rsp->id;
+	/* Build command packet. */
+	req->current_outstanding_cmd = handle;
+	req->outstanding_cmds[handle] = sp;
+	sp->handle = handle;
+	req->cnt -= req_cnt;
+
+	/* Send the command to the firmware */
+	wmb();
+	qla2x00_start_iocbs(vha, req);
+queuing_error:
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+	return rval;
+}
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 0b09776..31ef8e2 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1546,6 +1546,149 @@ qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
 	return 1;
 }
 
+static void
+qla25xx_process_bidir_status_iocb(scsi_qla_host_t *vha, void *pkt,
+				  struct req_que *req, uint32_t index)
+{
+	struct qla_hw_data *ha = vha->hw;
+	srb_t *sp;
+	uint16_t	comp_status;
+	uint16_t	scsi_status;
+	uint16_t thread_id;
+	uint32_t rval = EXT_STATUS_OK;
+	struct fc_bsg_job *bsg_job = NULL;
+	sts_entry_t *sts;
+	struct sts_entry_24xx *sts24;
+	sts = (sts_entry_t *) pkt;
+	sts24 = (struct sts_entry_24xx *) pkt;
+
+	/* Validate handle. */
+	if (index >= MAX_OUTSTANDING_COMMANDS) {
+		ql_log(ql_log_warn, vha, 0x70af,
+		    "Invalid SCSI completion handle 0x%x.\n", index);
+		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+		return;
+	}
+
+	sp = req->outstanding_cmds[index];
+	if (sp) {
+		/* Free outstanding command slot. */
+		req->outstanding_cmds[index] = NULL;
+		bsg_job = sp->u.bsg_job;
+	} else {
+		ql_log(ql_log_warn, vha, 0x70b0,
+		    "Req:%d: Invalid ISP SCSI completion handle(0x%x)\n",
+		    req->id, index);
+
+		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+		return;
+	}
+
+	if (IS_FWI2_CAPABLE(ha)) {
+		comp_status = le16_to_cpu(sts24->comp_status);
+		scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
+	} else {
+		comp_status = le16_to_cpu(sts->comp_status);
+		scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
+	}
+
+	thread_id = bsg_job->request->rqst_data.h_vendor.vendor_cmd[1];
+	switch (comp_status) {
+	case CS_COMPLETE:
+		if (scsi_status == 0) {
+			bsg_job->reply->reply_payload_rcv_len =
+					bsg_job->reply_payload.payload_len;
+			rval = EXT_STATUS_OK;
+		}
+		goto done;
+
+	case CS_DATA_OVERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b1,
+		    "Command completed with date overrun thread_id=%d\n",
+		    thread_id);
+		rval = EXT_STATUS_DATA_OVERRUN;
+		break;
+
+	case CS_DATA_UNDERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b2,
+		    "Command completed with date underrun thread_id=%d\n",
+		    thread_id);
+		rval = EXT_STATUS_DATA_UNDERRUN;
+		break;
+	case CS_BIDIR_RD_OVERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b3,
+		    "Command completed with read data overrun thread_id=%d\n",
+		    thread_id);
+		rval = EXT_STATUS_DATA_OVERRUN;
+		break;
+
+	case CS_BIDIR_RD_WR_OVERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b4,
+		    "Command completed with read and write data overrun "
+		    "thread_id=%d\n", thread_id);
+		rval = EXT_STATUS_DATA_OVERRUN;
+		break;
+
+	case CS_BIDIR_RD_OVERRUN_WR_UNDERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b5,
+		    "Command completed with read data over and write data "
+		    "underrun thread_id=%d\n", thread_id);
+		rval = EXT_STATUS_DATA_OVERRUN;
+		break;
+
+	case CS_BIDIR_RD_UNDERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b6,
+		    "Command completed with read data data underrun "
+		    "thread_id=%d\n", thread_id);
+		rval = EXT_STATUS_DATA_UNDERRUN;
+		break;
+
+	case CS_BIDIR_RD_UNDERRUN_WR_OVERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b7,
+		    "Command completed with read data under and write data "
+		    "overrun thread_id=%d\n", thread_id);
+		rval = EXT_STATUS_DATA_UNDERRUN;
+		break;
+
+	case CS_BIDIR_RD_WR_UNDERRUN:
+		ql_dbg(ql_dbg_user, vha, 0x70b8,
+		    "Command completed with read and write data underrun "
+		    "thread_id=%d\n", thread_id);
+		rval = EXT_STATUS_DATA_UNDERRUN;
+		break;
+
+	case CS_BIDIR_DMA:
+		ql_dbg(ql_dbg_user, vha, 0x70b9,
+		    "Command completed with data DMA error thread_id=%d\n",
+		    thread_id);
+		rval = EXT_STATUS_DMA_ERR;
+		break;
+
+	case CS_TIMEOUT:
+		ql_dbg(ql_dbg_user, vha, 0x70ba,
+		    "Command completed with timeout thread_id=%d\n",
+		    thread_id);
+		rval = EXT_STATUS_TIMEOUT;
+		break;
+	default:
+		ql_dbg(ql_dbg_user, vha, 0x70bb,
+		    "Command completed with completion status=0x%x "
+		    "thread_id=%d\n", comp_status, thread_id);
+		rval = EXT_STATUS_ERR;
+		break;
+	}
+		bsg_job->reply->reply_payload_rcv_len = 0;
+
+done:
+	/* Return the vendor specific reply to API */
+	bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] = rval;
+	bsg_job->reply_len = sizeof(struct fc_bsg_reply);
+	/* Always return DID_OK, bsg will send the vendor specific response
+	 * in this case only */
+	sp->done(vha, sp, (DID_OK << 6));
+
+}
+
 /**
  * qla2x00_status_entry() - Process a Status IOCB entry.
  * @ha: SCSI driver HA context
@@ -1573,12 +1716,14 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
 	struct req_que *req;
 	int logit = 1;
 	int res = 0;
+	uint16_t state_flags = 0;
 
 	sts = (sts_entry_t *) pkt;
 	sts24 = (struct sts_entry_24xx *) pkt;
 	if (IS_FWI2_CAPABLE(ha)) {
 		comp_status = le16_to_cpu(sts24->comp_status);
 		scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
+		state_flags = le16_to_cpu(sts24->state_flags);
 	} else {
 		comp_status = le16_to_cpu(sts->comp_status);
 		scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
@@ -1587,17 +1732,9 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
 	que = MSW(sts->handle);
 	req = ha->req_q_map[que];
 
-	/* Fast path completion. */
-	if (comp_status == CS_COMPLETE && scsi_status == 0) {
-		qla2x00_process_completed_request(vha, req, handle);
-
-		return;
-	}
-
 	/* Validate handle. */
 	if (handle < MAX_OUTSTANDING_COMMANDS) {
 		sp = req->outstanding_cmds[handle];
-		req->outstanding_cmds[handle] = NULL;
 	} else
 		sp = NULL;
 
@@ -1612,6 +1749,20 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
 		qla2xxx_wake_dpc(vha);
 		return;
 	}
+
+	if (unlikely((state_flags & BIT_1) && (sp->type == SRB_BIDI_CMD))) {
+		qla25xx_process_bidir_status_iocb(vha, pkt, req, handle);
+		return;
+	}
+
+	/* Fast path completion. */
+	if (comp_status == CS_COMPLETE && scsi_status == 0) {
+		qla2x00_process_completed_request(vha, req, handle);
+
+		return;
+	}
+
+	req->outstanding_cmds[handle] = NULL;
 	cp = GET_CMD_SP(sp);
 	if (cp == NULL) {
 		ql_dbg(ql_dbg_io, vha, 0x3018,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 5f99029..3e77565 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2203,6 +2203,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	ha->mem_only = mem_only;
 	spin_lock_init(&ha->hardware_lock);
 	spin_lock_init(&ha->vport_slock);
+	mutex_init(&ha->selflogin_lock);
 
 	/* Set ISP-type information. */
 	qla2x00_set_isp_flags(ha);