diff options
Diffstat (limited to 'drivers/scsi/stex.c')
| -rw-r--r-- | drivers/scsi/stex.c | 109 |
1 files changed, 36 insertions, 73 deletions
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index 9ac83abc4028..adda296b594b 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -395,53 +395,34 @@ static struct req_msg *stex_alloc_req(struct st_hba *hba) static int stex_map_sg(struct st_hba *hba, struct req_msg *req, struct st_ccb *ccb) { - struct pci_dev *pdev = hba->pdev; struct scsi_cmnd *cmd; - dma_addr_t dma_handle; - struct scatterlist *src; + struct scatterlist *sg; struct st_sgtable *dst; - int i; + int i, nseg; cmd = ccb->cmd; dst = (struct st_sgtable *)req->variable; dst->max_sg_count = cpu_to_le16(ST_MAX_SG); - dst->sz_in_byte = cpu_to_le32(cmd->request_bufflen); - - if (cmd->use_sg) { - int n_elem; + dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd)); - src = (struct scatterlist *) cmd->request_buffer; - n_elem = pci_map_sg(pdev, src, - cmd->use_sg, cmd->sc_data_direction); - if (n_elem <= 0) - return -EIO; + nseg = scsi_dma_map(cmd); + if (nseg < 0) + return -EIO; + if (nseg) { + ccb->sg_count = nseg; + dst->sg_count = cpu_to_le16((u16)nseg); - ccb->sg_count = n_elem; - dst->sg_count = cpu_to_le16((u16)n_elem); - - for (i = 0; i < n_elem; i++, src++) { - dst->table[i].count = cpu_to_le32((u32)sg_dma_len(src)); + scsi_for_each_sg(cmd, sg, nseg, i) { + dst->table[i].count = cpu_to_le32((u32)sg_dma_len(sg)); dst->table[i].addr = - cpu_to_le32(sg_dma_address(src) & 0xffffffff); + cpu_to_le32(sg_dma_address(sg) & 0xffffffff); dst->table[i].addr_hi = - cpu_to_le32((sg_dma_address(src) >> 16) >> 16); + cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); dst->table[i].ctrl = SG_CF_64B | SG_CF_HOST; } dst->table[--i].ctrl |= SG_CF_EOT; - return 0; } - dma_handle = pci_map_single(pdev, cmd->request_buffer, - cmd->request_bufflen, cmd->sc_data_direction); - cmd->SCp.dma_handle = dma_handle; - - ccb->sg_count = 1; - dst->sg_count = cpu_to_le16(1); - dst->table[0].addr = cpu_to_le32(dma_handle & 0xffffffff); - dst->table[0].addr_hi = cpu_to_le32((dma_handle >> 16) >> 16); - dst->table[0].count = cpu_to_le32((u32)cmd->request_bufflen); - dst->table[0].ctrl = SG_CF_EOT | SG_CF_64B | SG_CF_HOST; - return 0; } @@ -451,24 +432,24 @@ static void stex_internal_copy(struct scsi_cmnd *cmd, size_t lcount; size_t len; void *s, *d, *base = NULL; - if (*count > cmd->request_bufflen) - *count = cmd->request_bufflen; + size_t offset; + + if (*count > scsi_bufflen(cmd)) + *count = scsi_bufflen(cmd); lcount = *count; while (lcount) { len = lcount; s = (void *)src; - if (cmd->use_sg) { - size_t offset = *count - lcount; - s += offset; - base = scsi_kmap_atomic_sg(cmd->request_buffer, - sg_count, &offset, &len); - if (base == NULL) { - *count -= lcount; - return; - } - d = base + offset; - } else - d = cmd->request_buffer; + + offset = *count - lcount; + s += offset; + base = scsi_kmap_atomic_sg(scsi_sglist(cmd), + sg_count, &offset, &len); + if (!base) { + *count -= lcount; + return; + } + d = base + offset; if (direction == ST_TO_CMD) memcpy(d, s, len); @@ -476,30 +457,24 @@ static void stex_internal_copy(struct scsi_cmnd *cmd, memcpy(s, d, len); lcount -= len; - if (cmd->use_sg) - scsi_kunmap_atomic_sg(base); + scsi_kunmap_atomic_sg(base); } } static int stex_direct_copy(struct scsi_cmnd *cmd, const void *src, size_t count) { - struct st_hba *hba = (struct st_hba *) &cmd->device->host->hostdata[0]; size_t cp_len = count; int n_elem = 0; - if (cmd->use_sg) { - n_elem = pci_map_sg(hba->pdev, cmd->request_buffer, - cmd->use_sg, cmd->sc_data_direction); - if (n_elem <= 0) - return 0; - } + n_elem = scsi_dma_map(cmd); + if (n_elem < 0) + return 0; stex_internal_copy(cmd, src, &cp_len, n_elem, ST_TO_CMD); - if (cmd->use_sg) - pci_unmap_sg(hba->pdev, cmd->request_buffer, - cmd->use_sg, cmd->sc_data_direction); + scsi_dma_unmap(cmd); + return cp_len == count; } @@ -678,18 +653,6 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) return 0; } -static void stex_unmap_sg(struct st_hba *hba, struct scsi_cmnd *cmd) -{ - if (cmd->sc_data_direction != DMA_NONE) { - if (cmd->use_sg) - pci_unmap_sg(hba->pdev, cmd->request_buffer, - cmd->use_sg, cmd->sc_data_direction); - else - pci_unmap_single(hba->pdev, cmd->SCp.dma_handle, - cmd->request_bufflen, cmd->sc_data_direction); - } -} - static void stex_scsi_done(struct st_ccb *ccb) { struct scsi_cmnd *cmd = ccb->cmd; @@ -756,7 +719,7 @@ static void stex_ys_commands(struct st_hba *hba, if (ccb->cmd->cmnd[0] == MGT_CMD && resp->scsi_status != SAM_STAT_CHECK_CONDITION) { - ccb->cmd->request_bufflen = + scsi_bufflen(ccb->cmd) = le32_to_cpu(*(__le32 *)&resp->variable[0]); return; } @@ -855,7 +818,7 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell) ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER)) stex_controller_info(hba, ccb); - stex_unmap_sg(hba, ccb->cmd); + scsi_dma_unmap(ccb->cmd); stex_scsi_done(ccb); hba->out_req_cnt--; } else if (ccb->req_type & PASSTHRU_REQ_TYPE) { @@ -1028,7 +991,7 @@ static int stex_abort(struct scsi_cmnd *cmd) } fail_out: - stex_unmap_sg(hba, cmd); + scsi_dma_unmap(cmd); hba->wait_ccb->req = NULL; /* nullify the req's future return */ hba->wait_ccb = NULL; result = FAILED; 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