[SCSI] sbp2: convert to use the data buffer accessors

- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 4cb6fa2..d0db6f8 100644 (file)
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -1488,69 +1488,6 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
        }
 }
 
-static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
-                                       struct sbp2_fwhost_info *hi,
-                                       struct sbp2_command_info *cmd,
-                                       struct scatterlist *sgpnt,
-                                       u32 orb_direction,
-                                       unsigned int scsi_request_bufflen,
-                                       void *scsi_request_buffer,
-                                       enum dma_data_direction dma_dir)
-{
-       cmd->dma_dir = dma_dir;
-       cmd->dma_size = scsi_request_bufflen;
-       cmd->dma_type = CMD_DMA_SINGLE;
-       cmd->cmd_dma = dma_map_single(hi->host->device.parent,
-                                     scsi_request_buffer,
-                                     cmd->dma_size, cmd->dma_dir);
-       orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
-       orb->misc |= ORB_SET_DIRECTION(orb_direction);
-
-       /* handle case where we get a command w/o s/g enabled
-        * (but check for transfers larger than 64K) */
-       if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
-
-               orb->data_descriptor_lo = cmd->cmd_dma;
-               orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
-
-       } else {
-               /* The buffer is too large. Turn this into page tables. */
-
-               struct sbp2_unrestricted_page_table *sg_element =
-                                               &cmd->scatter_gather_element[0];
-               u32 sg_count, sg_len;
-               dma_addr_t sg_addr;
-
-               orb->data_descriptor_lo = cmd->sge_dma;
-               orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
-
-               /* fill out our SBP-2 page tables; split up the large buffer */
-               sg_count = 0;
-               sg_len = scsi_request_bufflen;
-               sg_addr = cmd->cmd_dma;
-               while (sg_len) {
-                       sg_element[sg_count].segment_base_lo = sg_addr;
-                       if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
-                               sg_element[sg_count].length_segment_base_hi =
-                                       PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
-                               sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
-                               sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
-                       } else {
-                               sg_element[sg_count].length_segment_base_hi =
-                                       PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
-                               sg_len = 0;
-                       }
-                       sg_count++;
-               }
-
-               orb->misc |= ORB_SET_DATA_SIZE(sg_count);
-
-               sbp2util_cpu_to_be32_buffer(sg_element,
-                               (sizeof(struct sbp2_unrestricted_page_table)) *
-                               sg_count);
-       }
-}
-
 static void sbp2_create_command_orb(struct sbp2_lu *lu,
                                    struct sbp2_command_info *cmd,
                                    unchar *scsi_cmd,
@@ -1594,13 +1531,9 @@ static void sbp2_create_command_orb(struct sbp2_lu *lu,
                orb->data_descriptor_hi = 0x0;
                orb->data_descriptor_lo = 0x0;
                orb->misc |= ORB_SET_DIRECTION(1);
-       } else if (scsi_use_sg)
+       } else
                sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
                                         orb_direction, dma_dir);
-       else
-               sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction,
-                                           scsi_request_bufflen,
-                                           scsi_request_buffer, dma_dir);
 
        sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
 
@@ -1689,15 +1622,15 @@ static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
                             void (*done)(struct scsi_cmnd *))
 {
        unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
-       unsigned int request_bufflen = SCpnt->request_bufflen;
+       unsigned int request_bufflen = scsi_bufflen(SCpnt);
        struct sbp2_command_info *cmd;
 
        cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
        if (!cmd)
                return -EIO;
 
-       sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg,
-                               request_bufflen, SCpnt->request_buffer,
+       sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
+                               request_bufflen, scsi_sglist(SCpnt),
                                SCpnt->sc_data_direction);
        sbp2_link_orb_command(lu, cmd);