qla2xxx: Add support for buffer to buffer credit value for ISP27XX.

Signed-off-by: Sawan Chandak <sawan.chandak@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 64fe17a..d135d6a 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -2181,6 +2181,58 @@ qla27xx_set_flash_upd_cap(struct fc_bsg_job *bsg_job)
 }
 
 static int
+qla27xx_get_bbcr_data(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;
+       struct qla_bbcr_data bbcr;
+       uint16_t loop_id, topo, sw_cap;
+       uint8_t domain, area, al_pa, state;
+       int rval;
+
+       if (!(IS_QLA27XX(ha)))
+               return -EPERM;
+
+       memset(&bbcr, 0, sizeof(bbcr));
+
+       if (vha->flags.bbcr_enable)
+               bbcr.status = QLA_BBCR_STATUS_ENABLED;
+       else
+               bbcr.status = QLA_BBCR_STATUS_DISABLED;
+
+       if (bbcr.status == QLA_BBCR_STATUS_ENABLED) {
+               rval = qla2x00_get_adapter_id(vha, &loop_id, &al_pa,
+                       &area, &domain, &topo, &sw_cap);
+               if (rval != QLA_SUCCESS)
+                       return -EIO;
+
+               state = (vha->bbcr >> 12) & 0x1;
+
+               if (state) {
+                       bbcr.state = QLA_BBCR_STATE_OFFLINE;
+                       bbcr.offline_reason_code = QLA_BBCR_REASON_LOGIN_REJECT;
+               } else {
+                       bbcr.state = QLA_BBCR_STATE_ONLINE;
+                       bbcr.negotiated_bbscn = (vha->bbcr >> 8) & 0xf;
+               }
+
+               bbcr.configured_bbscn = vha->bbcr & 0xf;
+       }
+
+       sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
+               bsg_job->reply_payload.sg_cnt, &bbcr, sizeof(bbcr));
+       bsg_job->reply->reply_payload_rcv_len = sizeof(bbcr);
+
+       bsg_job->reply->reply_data.vendor_reply.vendor_rsp[0] = EXT_STATUS_OK;
+
+       bsg_job->reply_len = sizeof(struct fc_bsg_reply);
+       bsg_job->reply->result = DID_OK << 16;
+       bsg_job->job_done(bsg_job);
+       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]) {
@@ -2241,6 +2293,9 @@ qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
        case QL_VND_SET_FLASH_UPDATE_CAPS:
                return qla27xx_set_flash_upd_cap(bsg_job);
 
+       case QL_VND_GET_BBCR_DATA:
+               return qla27xx_get_bbcr_data(bsg_job);
+
        default:
                return -ENOSYS;
        }

diff --git a/drivers/scsi/qla2xxx/qla_bsg.h b/drivers/scsi/qla2xxx/qla_bsg.h
index 6c45bf4..4275177 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_bsg.h
+++ b/drivers/scsi/qla2xxx/qla_bsg.h
@@ -27,6 +27,7 @@
 #define        QL_VND_SERDES_OP_EX     0x14
 #define QL_VND_GET_FLASH_UPDATE_CAPS    0x15
 #define QL_VND_SET_FLASH_UPDATE_CAPS    0x16
+#define QL_VND_GET_BBCR_DATA    0x17
 
 /* BSG Vendor specific subcode returns */
 #define EXT_STATUS_OK                  0
@@ -239,4 +240,27 @@ struct qla_flash_update_caps {
        uint32_t  outage_duration;
        uint8_t   reserved[20];
 } __packed;
+
+/* BB_CR Status */
+#define QLA_BBCR_STATUS_DISABLED       0
+#define QLA_BBCR_STATUS_ENABLED        1
+
+/* BB_CR State */
+#define QLA_BBCR_STATE_OFFLINE         0
+#define QLA_BBCR_STATE_ONLINE          1
+
+/* BB_CR Offline Reason Code */
+#define QLA_BBCR_REASON_PORT_SPEED     1
+#define QLA_BBCR_REASON_PEER_PORT      2
+#define QLA_BBCR_REASON_SWITCH         3
+#define QLA_BBCR_REASON_LOGIN_REJECT   4
+
+struct  qla_bbcr_data {
+       uint8_t   status;         /* 1 - enabled, 0 - Disabled */
+       uint8_t   state;          /* 1 - online, 0 - offline */
+       uint8_t   configured_bbscn;       /* 0-15 */
+       uint8_t   negotiated_bbscn;       /* 0-15 */
+       uint8_t   offline_reason_code;
+       uint8_t   reserved[11];
+} __packed;
 #endif

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 987480f..c4bd62a 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3583,6 +3583,7 @@ typedef struct scsi_qla_host {
                uint32_t        delete_progress:1;
 
                uint32_t        fw_tgt_reported:1;
+               uint32_t        bbcr_enable:1;
        } flags;
 
        atomic_t        loop_state;
@@ -3715,6 +3716,7 @@ typedef struct scsi_qla_host {
        atomic_t        vref_count;
        struct qla8044_reset_template reset_tmplt;
        struct qla_tgt_counters tgt_counters;
+       uint16_t        bbcr;
 } scsi_qla_host_t;
 
 struct qla27xx_image_status {

diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h
index 7f095e3..4c0f3a7 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -1288,7 +1288,9 @@ struct vp_rpt_id_entry_24xx {
 
        uint8_t vp_idx_map[16];
 
-       uint8_t reserved_4[32];
+       uint8_t reserved_4[28];
+       uint16_t bbcr;
+       uint8_t reserved_5[6];
 };
 
 #define VF_EVFP_IOCB_TYPE       0x26    /* Exchange Virtual Fabric Parameters entry. */

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 87e6758..4433cfb 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -1349,6 +1349,8 @@ qla2x00_get_adapter_id(scsi_qla_host_t *vha, uint16_t *id, uint8_t *al_pa,
                mcp->in_mb |= MBX_13|MBX_12|MBX_11|MBX_10;
        if (IS_FWI2_CAPABLE(vha->hw))
                mcp->in_mb |= MBX_19|MBX_18|MBX_17|MBX_16;
+       if (IS_QLA27XX(vha->hw))
+               mcp->in_mb |= MBX_15;
        mcp->tov = MBX_TOV_SECONDS;
        mcp->flags = 0;
        rval = qla2x00_mailbox_command(vha, mcp);
@@ -1400,6 +1402,9 @@ qla2x00_get_adapter_id(scsi_qla_host_t *vha, uint16_t *id, uint8_t *al_pa,
                                    wwn_to_u64(vha->port_name));
                        }
                }
+
+               if (IS_QLA27XX(vha->hw))
+                       vha->bbcr = mcp->mb[15];
        }
 
        return rval;
@@ -3612,6 +3617,9 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
                    rptid_entry->port_id[2], rptid_entry->port_id[1],
                    rptid_entry->port_id[0]);
 
+               /* buffer to buffer credit flag */
+               vha->flags.bbcr_enable = (rptid_entry->bbcr & 0xf) != 0;
+
                /* FA-WWN is only for physical port */
                if (!vp_idx) {
                        void *wwpn = ha->init_cb->port_name;