[SCSI] qla2xxx: Add iIDMA support.

iIDMA (Intelligent Interleaved Direct Memory Access) allows for
the HBA hardware to send FC frames at the rate at which they can
be received by a target device.  By taking advantage of the
higher link rate, the HBA can maximize bandwidth utilization in a
heterogeneous multi-speed SAN.

Within a fabric topology, port speed detection is done via a Name
Server command (GFPN_ID) followed by a Fabric Management command
(GPSC).  In an FCAL/N2N topology, port speed is based on the HBA
link-rate.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 186 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 2ebf259fccb2..029953c1a9c8 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -687,7 +687,6 @@ qla2x00_rsnn_nn(scsi_qla_host_t *ha)
         return (rval);
 }
 
-
 /**
  * qla2x00_prep_sns_cmd() - Prepare common SNS command request fields for query.
  * @ha: HA context
@@ -1647,3 +1646,189 @@ qla2x00_fdmi_register(scsi_qla_host_t *ha)
 
         return rval;
 }
+
+/**
+ * qla2x00_gfpn_id() - SNS Get Fabric Port Name (GFPN_ID) query.
+ * @ha: HA context
+ * @list: switch info entries to populate
+ *
+ * Returns 0 on success.
+ */
+int
+qla2x00_gfpn_id(scsi_qla_host_t *ha, sw_info_t *list)
+{
+        int             rval;
+        uint16_t        i;
+
+        ms_iocb_entry_t *ms_pkt;
+        struct ct_sns_req       *ct_req;
+        struct ct_sns_rsp       *ct_rsp;
+
+        if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
+                return QLA_FUNCTION_FAILED;
+
+        for (i = 0; i < MAX_FIBRE_DEVICES; i++) {
+                /* Issue GFPN_ID */
+                memset(list[i].fabric_port_name, 0, WWN_SIZE);
+
+                /* Prepare common MS IOCB */
+                ms_pkt = qla2x00_prep_ms_iocb(ha, GFPN_ID_REQ_SIZE,
+                    GFPN_ID_RSP_SIZE);
+
+                /* Prepare CT request */
+                ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GFPN_ID_CMD,
+                    GFPN_ID_RSP_SIZE);
+                ct_rsp = &ha->ct_sns->p.rsp;
+
+                /* Prepare CT arguments -- port_id */
+                ct_req->req.port_id.port_id[0] = list[i].d_id.b.domain;
+                ct_req->req.port_id.port_id[1] = list[i].d_id.b.area;
+                ct_req->req.port_id.port_id[2] = list[i].d_id.b.al_pa;
+
+                /* Execute MS IOCB */
+                rval = qla2x00_issue_iocb(ha, ha->ms_iocb, ha->ms_iocb_dma,
+                    sizeof(ms_iocb_entry_t));
+                if (rval != QLA_SUCCESS) {
+                        /*EMPTY*/
+                        DEBUG2_3(printk("scsi(%ld): GFPN_ID issue IOCB "
+                            "failed (%d).\n", ha->host_no, rval));
+                } else if (qla2x00_chk_ms_status(ha, ms_pkt, ct_rsp,
+                    "GFPN_ID") != QLA_SUCCESS) {
+                        rval = QLA_FUNCTION_FAILED;
+                } else {
+                        /* Save fabric portname */
+                        memcpy(list[i].fabric_port_name,
+                            ct_rsp->rsp.gfpn_id.port_name, WWN_SIZE);
+                }
+
+                /* Last device exit. */
+                if (list[i].d_id.b.rsvd_1 != 0)
+                        break;
+        }
+
+        return (rval);
+}
+
+static inline void *
+qla24xx_prep_ms_fm_iocb(scsi_qla_host_t *ha, uint32_t req_size,
+    uint32_t rsp_size)
+{
+        struct ct_entry_24xx *ct_pkt;
+
+        ct_pkt = (struct ct_entry_24xx *)ha->ms_iocb;
+        memset(ct_pkt, 0, sizeof(struct ct_entry_24xx));
+
+        ct_pkt->entry_type = CT_IOCB_TYPE;
+        ct_pkt->entry_count = 1;
+        ct_pkt->nport_handle = cpu_to_le16(ha->mgmt_svr_loop_id);
+        ct_pkt->timeout = __constant_cpu_to_le16(59);
+        ct_pkt->cmd_dsd_count = __constant_cpu_to_le16(1);
+        ct_pkt->rsp_dsd_count = __constant_cpu_to_le16(1);
+        ct_pkt->rsp_byte_count = cpu_to_le32(rsp_size);
+        ct_pkt->cmd_byte_count = cpu_to_le32(req_size);
+
+        ct_pkt->dseg_0_address[0] = cpu_to_le32(LSD(ha->ct_sns_dma));
+        ct_pkt->dseg_0_address[1] = cpu_to_le32(MSD(ha->ct_sns_dma));
+        ct_pkt->dseg_0_len = ct_pkt->cmd_byte_count;
+
+        ct_pkt->dseg_1_address[0] = cpu_to_le32(LSD(ha->ct_sns_dma));
+        ct_pkt->dseg_1_address[1] = cpu_to_le32(MSD(ha->ct_sns_dma));
+        ct_pkt->dseg_1_len = ct_pkt->rsp_byte_count;
+
+        return ct_pkt;
+}
+
+
+static inline struct ct_sns_req *
+qla24xx_prep_ct_fm_req(struct ct_sns_req *ct_req, uint16_t cmd,
+    uint16_t rsp_size)
+{
+        memset(ct_req, 0, sizeof(struct ct_sns_pkt));
+
+        ct_req->header.revision = 0x01;
+        ct_req->header.gs_type = 0xFA;
+        ct_req->header.gs_subtype = 0x01;
+        ct_req->command = cpu_to_be16(cmd);
+        ct_req->max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
+
+        return ct_req;
+}
+
+/**
+ * qla2x00_gpsc() - FCS Get Port Speed Capabilities (GPSC) query.
+ * @ha: HA context
+ * @list: switch info entries to populate
+ *
+ * Returns 0 on success.
+ */
+int
+qla2x00_gpsc(scsi_qla_host_t *ha, sw_info_t *list)
+{
+        int             rval;
+        uint16_t        i;
+
+        ms_iocb_entry_t *ms_pkt;
+        struct ct_sns_req       *ct_req;
+        struct ct_sns_rsp       *ct_rsp;
+
+        if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
+                return QLA_FUNCTION_FAILED;
+
+        rval = qla2x00_mgmt_svr_login(ha);
+        if (rval)
+                return rval;
+
+        for (i = 0; i < MAX_FIBRE_DEVICES; i++) {
+                /* Issue GFPN_ID */
+                list[i].fp_speeds = list[i].fp_speed = 0;
+
+                /* Prepare common MS IOCB */
+                ms_pkt = qla24xx_prep_ms_fm_iocb(ha, GPSC_REQ_SIZE,
+                    GPSC_RSP_SIZE);
+
+                /* Prepare CT request */
+                ct_req = qla24xx_prep_ct_fm_req(&ha->ct_sns->p.req,
+                    GPSC_CMD, GPSC_RSP_SIZE);
+                ct_rsp = &ha->ct_sns->p.rsp;
+
+                /* Prepare CT arguments -- port_name */
+                memcpy(ct_req->req.gpsc.port_name, list[i].fabric_port_name,
+                    WWN_SIZE);
+
+                /* Execute MS IOCB */
+                rval = qla2x00_issue_iocb(ha, ha->ms_iocb, ha->ms_iocb_dma,
+                    sizeof(ms_iocb_entry_t));
+                if (rval != QLA_SUCCESS) {
+                        /*EMPTY*/
+                        DEBUG2_3(printk("scsi(%ld): GPSC issue IOCB "
+                            "failed (%d).\n", ha->host_no, rval));
+                } else if (qla2x00_chk_ms_status(ha, ms_pkt, ct_rsp,
+                    "GPSC") != QLA_SUCCESS) {
+                        rval = QLA_FUNCTION_FAILED;
+                } else {
+                        /* Save portname */
+                        list[i].fp_speeds = ct_rsp->rsp.gpsc.speeds;
+                        list[i].fp_speed = ct_rsp->rsp.gpsc.speed;
+
+                        DEBUG2_3(printk("scsi(%ld): GPSC ext entry - "
+                            "fpn %02x%02x%02x%02x%02x%02x%02x%02x speeds=%04x "
+                            "speed=%04x.\n", ha->host_no,
+                            list[i].fabric_port_name[0],
+                            list[i].fabric_port_name[1],
+                            list[i].fabric_port_name[2],
+                            list[i].fabric_port_name[3],
+                            list[i].fabric_port_name[4],
+                            list[i].fabric_port_name[5],
+                            list[i].fabric_port_name[6],
+                            list[i].fabric_port_name[7],
+                            be16_to_cpu(list[i].fp_speeds),
+                            be16_to_cpu(list[i].fp_speed)));
+                }
+
+                /* Last device exit. */
+                if (list[i].d_id.b.rsvd_1 != 0)
+                        break;
+        }
+
+        return (rval);
+}