- command->dma_dir = dma_dir;
- command->dma_size = scsi_request_bufflen;
- command->dma_type = CMD_DMA_SINGLE;
- command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
- command->dma_size, command->dma_dir);
- orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
- orb->misc |= ORB_SET_DIRECTION(orb_direction);
-
- SBP2_DMA_ALLOC("single bulk");
-
- /*
- * 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 = command->cmd_dma;
- orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
-
- } else {
- struct sbp2_unrestricted_page_table *sg_element =
- &command->scatter_gather_element[0];
- u32 sg_count, sg_len;
- dma_addr_t sg_addr;
-
- /*
- * Need to turn this into page tables, since the
- * buffer is too large.
- */
- orb->data_descriptor_lo = command->sge_dma;
-
- /* Use page tables (s/g) */
- orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
-
- /*
- * fill out our sbp-2 page tables (and split up
- * the large buffer)
- */
- sg_count = 0;
- sg_len = scsi_request_bufflen;
- sg_addr = command->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++;
- }
-
- /* Number of page table (s/g) elements */
- orb->misc |= ORB_SET_DATA_SIZE(sg_count);
-
- sbp2util_packet_dump(sg_element,
- (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
- "sbp2 s/g list", command->sge_dma);
-
- /* Byte swap page tables if necessary */
- sbp2util_cpu_to_be32_buffer(sg_element,
- (sizeof(struct sbp2_unrestricted_page_table)) *
- sg_count);
- }
-}
-
-/*
- * This function is called to create the actual command orb and s/g list
- * out of the scsi command itself.
- */
-static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
- struct sbp2_command_info *command,
- unchar *scsi_cmd,
- unsigned int scsi_use_sg,
- unsigned int scsi_request_bufflen,
- void *scsi_request_buffer,
- enum dma_data_direction dma_dir)
-{
- struct sbp2scsi_host_info *hi = scsi_id->hi;
- struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
- struct sbp2_command_orb *command_orb = &command->command_orb;