[SCSI] qla2xxx: Add ISP24xx IOCB manipulation routines.

Add ISP24xx IOCB manipulation routines.

Add appropriate glue-code for ISP24xx support while
manipulting IOCB packets.  Add an ISP24xx specific
'start_scsi' routine due to command-type-7 layout
changes.

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

3 files changed, 323 insertions, 16 deletions

diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 0dd732486e24..15a05682f012 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -94,6 +94,7 @@ extern uint16_t qla2x00_calc_iocbs_64(uint16_t);
 extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);
 extern void qla2x00_build_scsi_iocbs_64(srb_t *, cmd_entry_t *, uint16_t);
 extern int qla2x00_start_scsi(srb_t *sp);
+extern int qla24xx_start_scsi(srb_t *sp);
 int qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);
 int __qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);
 
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
index 6cf7036ccf4c..a4357f0aeea3 100644
--- a/drivers/scsi/qla2xxx/qla_inline.h
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -236,6 +236,19 @@ qla2x00_delete_timer_from_cmd(srb_t *sp)
         }
 }
 
+static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
+static inline uint8_t *
+host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
+{
+       uint32_t *ifcp = (uint32_t *) fcp;
+       uint32_t *ofcp = (uint32_t *) fcp;
+       uint32_t iter = bsize >> 2;
+
+       for (; iter ; iter--)
+               *ofcp++ = swab32(*ifcp++);
+
+       return fcp;
+}
 
 static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
 static inline int
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 846dbfe26be3..4343c65523a5 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -468,29 +468,37 @@ queuing_error:
  *
  * Returns non-zero if a failure occured, else zero.
  */
-int
+int 
 __qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
     uint8_t type)
 {
-        mrk_entry_t     *pkt;
+        mrk_entry_t *mrk;
+        struct mrk_entry_24xx *mrk24;
 
-        pkt = (mrk_entry_t *)qla2x00_req_pkt(ha);
-        if (pkt == NULL) {
-                DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__));
+        mrk24 = NULL;
+        mrk = (mrk_entry_t *)qla2x00_req_pkt(ha);
+        if (mrk == NULL) {
+                DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n",
+                    __func__, ha->host_no));
 
                 return (QLA_FUNCTION_FAILED);
         }
 
-        pkt->entry_type = MARKER_TYPE;
-        pkt->modifier = type;
-
+        mrk->entry_type = MARKER_TYPE;
+        mrk->modifier = type;
         if (type != MK_SYNC_ALL) {
-                pkt->lun = cpu_to_le16(lun);
-                SET_TARGET_ID(ha, pkt->target, loop_id);
+                if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
+                        mrk24 = (struct mrk_entry_24xx *) mrk;
+                        mrk24->nport_handle = cpu_to_le16(loop_id);
+                        mrk24->lun[1] = LSB(lun);
+                        mrk24->lun[2] = MSB(lun);
+                } else {
+                        SET_TARGET_ID(ha, mrk->target, loop_id);
+                        mrk->lun = cpu_to_le16(lun);
+                }
         }
         wmb();
 
-        /* Issue command to ISP */
         qla2x00_isp_cmd(ha);
 
         return (QLA_SUCCESS);
@@ -521,7 +529,7 @@ qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
 static request_t *
 qla2x00_req_pkt(scsi_qla_host_t *ha)
 {
-        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
+        device_reg_t __iomem *reg = ha->iobase;
         request_t       *pkt = NULL;
         uint16_t        cnt;
         uint32_t        *dword_ptr;
@@ -532,7 +540,12 @@ qla2x00_req_pkt(scsi_qla_host_t *ha)
         for (timer = HZ; timer; timer--) {
                 if ((req_cnt + 2) >= ha->req_q_cnt) {
                         /* Calculate number of free request entries. */
-                        cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
+                        if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
+                                cnt = (uint16_t)RD_REG_DWORD(
+                                    &reg->isp24.req_q_out);
+                        else
+                                cnt = qla2x00_debounce_register(
+                                    ISP_REQ_Q_OUT(ha, &reg->isp));
                         if  (ha->req_ring_index < cnt)
                                 ha->req_q_cnt = cnt - ha->req_ring_index;
                         else
@@ -586,7 +599,7 @@ qla2x00_req_pkt(scsi_qla_host_t *ha)
 void
 qla2x00_isp_cmd(scsi_qla_host_t *ha)
 {
-        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
+        device_reg_t __iomem *reg = ha->iobase;
 
         DEBUG5(printk("%s(): IOCB data:\n", __func__));
         DEBUG5(qla2x00_dump_buffer(
@@ -601,6 +614,286 @@ qla2x00_isp_cmd(scsi_qla_host_t *ha)
                 ha->request_ring_ptr++;
 
         /* Set chip new ring index. */
-        WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
-        RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));     /* PCI Posting. */
+        if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
+                WRT_REG_DWORD(&reg->isp24.req_q_in, ha->req_ring_index);
+                RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
+        } else {
+                WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp), ha->req_ring_index);
+                RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
+        }
+
+}
+
+/**
+ * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
+ * Continuation Type 1 IOCBs to allocate.
+ *
+ * @dsds: number of data segment decriptors needed
+ *
+ * Returns the number of IOCB entries needed to store @dsds.
+ */
+static inline uint16_t
+qla24xx_calc_iocbs(uint16_t dsds)
+{
+        uint16_t iocbs;
+
+        iocbs = 1;
+        if (dsds > 1) {
+                iocbs += (dsds - 1) / 5;
+                if ((dsds - 1) % 5)
+                        iocbs++;
+        }
+        return iocbs;
+}
+
+/**
+ * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
+ * IOCB types.
+ *
+ * @sp: SRB command to process
+ * @cmd_pkt: Command type 3 IOCB
+ * @tot_dsds: Total number of segments to transfer
+ */
+static inline void
+qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
+    uint16_t tot_dsds)
+{
+        uint16_t        avail_dsds;
+        uint32_t        *cur_dsd;
+        scsi_qla_host_t *ha;
+        struct scsi_cmnd *cmd;
+
+        cmd = sp->cmd;
+
+        /* Update entry type to indicate Command Type 3 IOCB */
+        *((uint32_t *)(&cmd_pkt->entry_type)) =
+            __constant_cpu_to_le32(COMMAND_TYPE_7);
+
+        /* No data transfer */
+        if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
+                cmd_pkt->byte_count = __constant_cpu_to_le32(0);
+                return;
+        }
+
+        ha = sp->ha;
+
+        /* Set transfer direction */
+        if (cmd->sc_data_direction == DMA_TO_DEVICE)
+                cmd_pkt->task_mgmt_flags =
+                    __constant_cpu_to_le16(TMF_WRITE_DATA);
+        else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
+                cmd_pkt->task_mgmt_flags =
+                    __constant_cpu_to_le16(TMF_READ_DATA);
+
+        /* One DSD is available in the Command Type 3 IOCB */
+        avail_dsds = 1;
+        cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
+
+        /* Load data segments */
+        if (cmd->use_sg != 0) {
+                struct  scatterlist *cur_seg;
+                struct  scatterlist *end_seg;
+
+                cur_seg = (struct scatterlist *)cmd->request_buffer;
+                end_seg = cur_seg + tot_dsds;
+                while (cur_seg < end_seg) {
+                        dma_addr_t      sle_dma;
+                        cont_a64_entry_t *cont_pkt;
+
+                        /* Allocate additional continuation packets? */
+                        if (avail_dsds == 0) {
+                                /*
+                                 * Five DSDs are available in the Continuation
+                                 * Type 1 IOCB.
+                                 */
+                                cont_pkt = qla2x00_prep_cont_type1_iocb(ha);
+                                cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
+                                avail_dsds = 5;
+                        }
+
+                        sle_dma = sg_dma_address(cur_seg);
+                        *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+                        *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+                        *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
+                        avail_dsds--;
+
+                        cur_seg++;
+                }
+        } else {
+                *cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle));
+                *cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle));
+                *cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
+        }
+}
+
+
+/**
+ * qla24xx_start_scsi() - Send a SCSI command to the ISP
+ * @sp: command to send to the ISP
+ *
+ * Returns non-zero if a failure occured, else zero.
+ */
+int
+qla24xx_start_scsi(srb_t *sp)
+{
+        int             ret;
+        unsigned long   flags;
+        scsi_qla_host_t *ha;
+        struct scsi_cmnd *cmd;
+        uint32_t        *clr_ptr;
+        uint32_t        index;
+        uint32_t        handle;
+        struct cmd_type_7 *cmd_pkt;
+        struct scatterlist *sg;
+        uint16_t        cnt;
+        uint16_t        req_cnt;
+        uint16_t        tot_dsds;
+        struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+        char            tag[2];
+
+        /* Setup device pointers. */
+        ret = 0;
+        ha = sp->ha;
+        reg = &ha->iobase->isp24;
+        cmd = sp->cmd;
+        /* So we know we haven't pci_map'ed anything yet */
+        tot_dsds = 0;
+
+        /* Send marker if required */
+        if (ha->marker_needed != 0) {
+                if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
+                        return QLA_FUNCTION_FAILED;
+                }
+                ha->marker_needed = 0;
+        }
+
+        /* Acquire ring specific lock */
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+
+        /* Check for room in outstanding command list. */
+        handle = ha->current_outstanding_cmd;
+        for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
+                handle++;
+                if (handle == MAX_OUTSTANDING_COMMANDS)
+                        handle = 1;
+                if (ha->outstanding_cmds[handle] == 0)
+                        break;
+        }
+        if (index == MAX_OUTSTANDING_COMMANDS)
+                goto queuing_error;
+
+        /* Map the sg table so we have an accurate count of sg entries needed */
+        if (cmd->use_sg) {
+                sg = (struct scatterlist *) cmd->request_buffer;
+                tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,
+                    cmd->sc_data_direction);
+                if (tot_dsds == 0)
+                        goto queuing_error;
+        } else if (cmd->request_bufflen) {
+                dma_addr_t      req_dma;
+
+                req_dma = pci_map_single(ha->pdev, cmd->request_buffer,
+                    cmd->request_bufflen, cmd->sc_data_direction);
+                if (dma_mapping_error(req_dma))
+                        goto queuing_error;
+
+                sp->dma_handle = req_dma;
+                tot_dsds = 1;
+        }
+
+        req_cnt = qla24xx_calc_iocbs(tot_dsds);
+        if (ha->req_q_cnt < (req_cnt + 2)) {
+                cnt = (uint16_t)RD_REG_DWORD_RELAXED(&reg->req_q_out);
+                if (ha->req_ring_index < cnt)
+                        ha->req_q_cnt = cnt - ha->req_ring_index;
+                else
+                        ha->req_q_cnt = ha->request_q_length -
+                                (ha->req_ring_index - cnt);
+        }
+        if (ha->req_q_cnt < (req_cnt + 2)) {
+                if  (cmd->use_sg)
+                        pci_unmap_sg(ha->pdev, sg, cmd->use_sg,
+                                        cmd->sc_data_direction);
+                goto queuing_error;
+        }
+
+        /* Build command packet. */
+        ha->current_outstanding_cmd = handle;
+        ha->outstanding_cmds[handle] = sp;
+        sp->ha = ha;
+        sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
+        ha->req_q_cnt -= req_cnt;
+
+        cmd_pkt = (struct cmd_type_7 *)ha->request_ring_ptr;
+        cmd_pkt->handle = handle;
+
+        /* Zero out remaining portion of packet. */
+        clr_ptr = (uint32_t *)cmd_pkt + 2;
+        memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
+        cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
+
+        /* Set NPORT-ID and LUN number*/
+        cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+        cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
+        cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
+        cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
+
+        cmd_pkt->lun[1] = LSB(sp->cmd->device->lun);
+        cmd_pkt->lun[2] = MSB(sp->cmd->device->lun);
+
+        /* Update tagged queuing modifier -- default is TSK_SIMPLE (0). */
+        if (scsi_populate_tag_msg(cmd, tag)) {
+                switch (tag[0]) {
+                case MSG_HEAD_TAG:
+                        cmd_pkt->task = TSK_HEAD_OF_QUEUE;
+                        break;
+                case MSG_ORDERED_TAG:
+                        cmd_pkt->task = TSK_ORDERED;
+                        break;
+                }
+        }
+
+        /* Load SCSI command packet. */
+        memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
+        host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
+
+        cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);
+
+        /* Build IOCB segments */
+        qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
+
+        /* Set total data segment count. */
+        cmd_pkt->entry_count = (uint8_t)req_cnt;
+        wmb();
+
+        /* Adjust ring index. */
+        ha->req_ring_index++;
+        if (ha->req_ring_index == ha->request_q_length) {
+                ha->req_ring_index = 0;
+                ha->request_ring_ptr = ha->request_ring;
+        } else
+                ha->request_ring_ptr++;
+
+        sp->flags |= SRB_DMA_VALID;
+        sp->state = SRB_ACTIVE_STATE;
+
+        /* Set chip new ring index. */
+        WRT_REG_DWORD(&reg->req_q_in, ha->req_ring_index);
+        RD_REG_DWORD_RELAXED(&reg->req_q_in);           /* PCI Posting. */
+
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+        return QLA_SUCCESS;
+
+queuing_error:
+        if (cmd->use_sg && tot_dsds) {
+                sg = (struct scatterlist *) cmd->request_buffer;
+                pci_unmap_sg(ha->pdev, sg, cmd->use_sg,
+                    cmd->sc_data_direction);
+        } else if (tot_dsds) {
+                pci_unmap_single(ha->pdev, sp->dma_handle,
+                    cmd->request_bufflen, cmd->sc_data_direction);
+        }
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        return QLA_FUNCTION_FAILED;
 }