diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_iocb.c | 72 |
1 files changed, 33 insertions, 39 deletions
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index 59d62cbb994..af964bb3d87 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -216,18 +216,7 @@ void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt, cur_seg++; } } else { - dma_addr_t req_dma; - struct page *page; - unsigned long offset; - - page = virt_to_page(cmd->request_buffer); - offset = ((unsigned long)cmd->request_buffer & ~PAGE_MASK); - req_dma = pci_map_page(ha->pdev, page, offset, - cmd->request_bufflen, cmd->sc_data_direction); - - sp->dma_handle = req_dma; - - *cur_dsd++ = cpu_to_le32(req_dma); + *cur_dsd++ = cpu_to_le32(sp->dma_handle); *cur_dsd++ = cpu_to_le32(cmd->request_bufflen); } } @@ -299,19 +288,8 @@ void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt, cur_seg++; } } else { - dma_addr_t req_dma; - struct page *page; - unsigned long offset; - - page = virt_to_page(cmd->request_buffer); - offset = ((unsigned long)cmd->request_buffer & ~PAGE_MASK); - req_dma = pci_map_page(ha->pdev, page, offset, - cmd->request_bufflen, cmd->sc_data_direction); - - sp->dma_handle = req_dma; - - *cur_dsd++ = cpu_to_le32(LSD(req_dma)); - *cur_dsd++ = cpu_to_le32(MSD(req_dma)); + *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); } } @@ -345,6 +323,8 @@ qla2x00_start_scsi(srb_t *sp) ha = sp->ha; reg = ha->iobase; 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) { @@ -369,8 +349,27 @@ qla2x00_start_scsi(srb_t *sp) 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; + } + /* Calculate the number of request entries needed. */ - req_cnt = (ha->calc_request_entries)(cmd->request->nr_hw_segments); + req_cnt = (ha->calc_request_entries)(tot_dsds); if (ha->req_q_cnt < (req_cnt + 2)) { cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg)); if (ha->req_ring_index < cnt) @@ -382,19 +381,6 @@ qla2x00_start_scsi(srb_t *sp) if (ha->req_q_cnt < (req_cnt + 2)) goto queuing_error; - /* Finally, we have enough space, now perform mappings. */ - tot_dsds = 0; - 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) { - tot_dsds++; - } - req_cnt = (ha->calc_request_entries)(tot_dsds); - /* Build command packet */ ha->current_outstanding_cmd = handle; ha->outstanding_cmds[handle] = sp; @@ -461,6 +447,14 @@ qla2x00_start_scsi(srb_t *sp) 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); |