diff options
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.c')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvscsi.c | 80 |
1 files changed, 23 insertions, 57 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index cb73faa7241..5870866abc9 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -350,20 +350,19 @@ static void unmap_cmd_data(struct srp_cmd *cmd, } } -static int map_sg_list(int num_entries, - struct scatterlist *sg, +static int map_sg_list(struct scsi_cmnd *cmd, int nseg, struct srp_direct_buf *md) { int i; + struct scatterlist *sg; u64 total_length = 0; - for (i = 0; i < num_entries; ++i) { + scsi_for_each_sg(cmd, sg, nseg, i) { struct srp_direct_buf *descr = md + i; - struct scatterlist *sg_entry = &sg[i]; - descr->va = sg_dma_address(sg_entry); - descr->len = sg_dma_len(sg_entry); + descr->va = sg_dma_address(sg); + descr->len = sg_dma_len(sg); descr->key = 0; - total_length += sg_dma_len(sg_entry); + total_length += sg_dma_len(sg); } return total_length; } @@ -384,24 +383,28 @@ static int map_sg_data(struct scsi_cmnd *cmd, int sg_mapped; u64 total_length = 0; - struct scatterlist *sg = cmd->request_buffer; struct srp_direct_buf *data = (struct srp_direct_buf *) srp_cmd->add_data; struct srp_indirect_buf *indirect = (struct srp_indirect_buf *) data; - sg_mapped = dma_map_sg(dev, sg, cmd->use_sg, DMA_BIDIRECTIONAL); - - if (sg_mapped == 0) + sg_mapped = scsi_dma_map(cmd); + if (!sg_mapped) + return 1; + else if (sg_mapped < 0) return 0; + else if (sg_mapped > SG_ALL) { + printk(KERN_ERR + "ibmvscsi: More than %d mapped sg entries, got %d\n", + SG_ALL, sg_mapped); + return 0; + } set_srp_direction(cmd, srp_cmd, sg_mapped); /* special case; we can use a single direct descriptor */ if (sg_mapped == 1) { - data->va = sg_dma_address(&sg[0]); - data->len = sg_dma_len(&sg[0]); - data->key = 0; + map_sg_list(cmd, sg_mapped, data); return 1; } @@ -410,7 +413,7 @@ static int map_sg_data(struct scsi_cmnd *cmd, indirect->table_desc.key = 0; if (sg_mapped <= MAX_INDIRECT_BUFS) { - total_length = map_sg_list(sg_mapped, sg, + total_length = map_sg_list(cmd, sg_mapped, &indirect->desc_list[0]); indirect->len = total_length; return 1; @@ -419,7 +422,7 @@ static int map_sg_data(struct scsi_cmnd *cmd, /* get indirect table */ if (!evt_struct->ext_list) { evt_struct->ext_list = (struct srp_direct_buf *) - dma_alloc_coherent(dev, + dma_alloc_coherent(dev, SG_ALL * sizeof(struct srp_direct_buf), &evt_struct->ext_list_token, 0); if (!evt_struct->ext_list) { @@ -429,50 +432,17 @@ static int map_sg_data(struct scsi_cmnd *cmd, } } - total_length = map_sg_list(sg_mapped, sg, evt_struct->ext_list); + total_length = map_sg_list(cmd, sg_mapped, evt_struct->ext_list); indirect->len = total_length; indirect->table_desc.va = evt_struct->ext_list_token; indirect->table_desc.len = sg_mapped * sizeof(indirect->desc_list[0]); memcpy(indirect->desc_list, evt_struct->ext_list, MAX_INDIRECT_BUFS * sizeof(struct srp_direct_buf)); - return 1; } /** - * map_single_data: - Maps memory and initializes memory decriptor fields - * @cmd: struct scsi_cmnd with the memory to be mapped - * @srp_cmd: srp_cmd that contains the memory descriptor - * @dev: device for which to map dma memory - * - * Called by map_data_for_srp_cmd() when building srp cmd from scsi cmd. - * Returns 1 on success. -*/ -static int map_single_data(struct scsi_cmnd *cmd, - struct srp_cmd *srp_cmd, struct device *dev) -{ - struct srp_direct_buf *data = - (struct srp_direct_buf *) srp_cmd->add_data; - - data->va = - dma_map_single(dev, cmd->request_buffer, - cmd->request_bufflen, - DMA_BIDIRECTIONAL); - if (dma_mapping_error(data->va)) { - sdev_printk(KERN_ERR, cmd->device, - "Unable to map request_buffer for command!\n"); - return 0; - } - data->len = cmd->request_bufflen; - data->key = 0; - - set_srp_direction(cmd, srp_cmd, 1); - - return 1; -} - -/** * map_data_for_srp_cmd: - Calls functions to map data for srp cmds * @cmd: struct scsi_cmnd with the memory to be mapped * @srp_cmd: srp_cmd that contains the memory descriptor @@ -502,11 +472,7 @@ static int map_data_for_srp_cmd(struct scsi_cmnd *cmd, return 0; } - if (!cmd->request_buffer) - return 1; - if (cmd->use_sg) - return map_sg_data(cmd, evt_struct, srp_cmd, dev); - return map_single_data(cmd, srp_cmd, dev); + return map_sg_data(cmd, evt_struct, srp_cmd, dev); } /** @@ -712,9 +678,9 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct) evt_struct->hostdata->dev); if (rsp->flags & SRP_RSP_FLAG_DOOVER) - cmnd->resid = rsp->data_out_res_cnt; + scsi_set_resid(cmnd, rsp->data_out_res_cnt); else if (rsp->flags & SRP_RSP_FLAG_DIOVER) - cmnd->resid = rsp->data_in_res_cnt; + scsi_set_resid(cmnd, rsp->data_in_res_cnt); } if (evt_struct->cmnd_done) |