diff options
author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2007-05-26 09:08:20 +0400 |
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committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-30 03:32:12 +0400 |
commit | 5f7186c841a13abff0bf81ee93754b4f46e19141 (patch) | |
tree | 381d9c0564edd1319513e40d3886b53da6057ea8 /drivers/scsi/qla4xxx/ql4_iocb.c | |
parent | 1928d73fac9a38be901dd5c9eb8b18b56ce9e18d (diff) | |
download | linux-5f7186c841a13abff0bf81ee93754b4f46e19141.tar.xz |
[SCSI] qla4xxx: 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.
Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: David C Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_iocb.c')
-rw-r--r-- | drivers/scsi/qla4xxx/ql4_iocb.c | 97 |
1 files changed, 34 insertions, 63 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_iocb.c b/drivers/scsi/qla4xxx/ql4_iocb.c index 6e3c8c81def3..5006ecb3ef5e 100644 --- a/drivers/scsi/qla4xxx/ql4_iocb.c +++ b/drivers/scsi/qla4xxx/ql4_iocb.c @@ -145,11 +145,13 @@ static void qla4xxx_build_scsi_iocbs(struct srb *srb, uint16_t avail_dsds; struct data_seg_a64 *cur_dsd; struct scsi_cmnd *cmd; + struct scatterlist *sg; + int i; cmd = srb->cmd; ha = srb->ha; - if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) { + if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { /* No data being transferred */ cmd_entry->ttlByteCnt = __constant_cpu_to_le32(0); return; @@ -158,40 +160,27 @@ static void qla4xxx_build_scsi_iocbs(struct srb *srb, avail_dsds = COMMAND_SEG; cur_dsd = (struct data_seg_a64 *) & (cmd_entry->dataseg[0]); - /* Load data segments */ - if (cmd->use_sg) { - struct scatterlist *cur_seg; - struct scatterlist *end_seg; - - cur_seg = (struct scatterlist *)cmd->request_buffer; - end_seg = cur_seg + tot_dsds; - while (cur_seg < end_seg) { - dma_addr_t sle_dma; - - /* Allocate additional continuation packets? */ - if (avail_dsds == 0) { - struct continuation_t1_entry *cont_entry; - - cont_entry = qla4xxx_alloc_cont_entry(ha); - cur_dsd = - (struct data_seg_a64 *) - &cont_entry->dataseg[0]; - avail_dsds = CONTINUE_SEG; - } - - sle_dma = sg_dma_address(cur_seg); - cur_dsd->base.addrLow = cpu_to_le32(LSDW(sle_dma)); - cur_dsd->base.addrHigh = cpu_to_le32(MSDW(sle_dma)); - cur_dsd->count = cpu_to_le32(sg_dma_len(cur_seg)); - avail_dsds--; - - cur_dsd++; - cur_seg++; + scsi_for_each_sg(cmd, sg, tot_dsds, i) { + dma_addr_t sle_dma; + + /* Allocate additional continuation packets? */ + if (avail_dsds == 0) { + struct continuation_t1_entry *cont_entry; + + cont_entry = qla4xxx_alloc_cont_entry(ha); + cur_dsd = + (struct data_seg_a64 *) + &cont_entry->dataseg[0]; + avail_dsds = CONTINUE_SEG; } - } else { - cur_dsd->base.addrLow = cpu_to_le32(LSDW(srb->dma_handle)); - cur_dsd->base.addrHigh = cpu_to_le32(MSDW(srb->dma_handle)); - cur_dsd->count = cpu_to_le32(cmd->request_bufflen); + + sle_dma = sg_dma_address(sg); + cur_dsd->base.addrLow = cpu_to_le32(LSDW(sle_dma)); + cur_dsd->base.addrHigh = cpu_to_le32(MSDW(sle_dma)); + cur_dsd->count = cpu_to_le32(sg_dma_len(sg)); + avail_dsds--; + + cur_dsd++; } } @@ -208,8 +197,8 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb) struct scsi_cmnd *cmd = srb->cmd; struct ddb_entry *ddb_entry; struct command_t3_entry *cmd_entry; - struct scatterlist *sg = NULL; + int nseg; uint16_t tot_dsds; uint16_t req_cnt; @@ -237,24 +226,11 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb) index = (uint32_t)cmd->request->tag; /* Calculate the number of request 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; - - srb->dma_handle = req_dma; - tot_dsds = 1; - } + nseg = scsi_dma_map(cmd); + if (nseg < 0) + goto queuing_error; + tot_dsds = nseg; + req_cnt = qla4xxx_calc_request_entries(tot_dsds); if (ha->req_q_count < (req_cnt + 2)) { @@ -283,7 +259,7 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb) int_to_scsilun(cmd->device->lun, &cmd_entry->lun); cmd_entry->cmdSeqNum = cpu_to_le32(ddb_entry->CmdSn); - cmd_entry->ttlByteCnt = cpu_to_le32(cmd->request_bufflen); + cmd_entry->ttlByteCnt = cpu_to_le32(scsi_bufflen(cmd)); memcpy(cmd_entry->cdb, cmd->cmnd, cmd->cmd_len); cmd_entry->dataSegCnt = cpu_to_le16(tot_dsds); cmd_entry->hdr.entryCount = req_cnt; @@ -293,13 +269,13 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb) * transferred, as the data direction bit is sometimed filled * in when there is no data to be transferred */ cmd_entry->control_flags = CF_NO_DATA; - if (cmd->request_bufflen) { + if (scsi_bufflen(cmd)) { if (cmd->sc_data_direction == DMA_TO_DEVICE) cmd_entry->control_flags = CF_WRITE; else if (cmd->sc_data_direction == DMA_FROM_DEVICE) cmd_entry->control_flags = CF_READ; - ha->bytes_xfered += cmd->request_bufflen; + ha->bytes_xfered += scsi_bufflen(cmd); if (ha->bytes_xfered & ~0xFFFFF){ ha->total_mbytes_xferred += ha->bytes_xfered >> 20; ha->bytes_xfered &= 0xFFFFF; @@ -363,14 +339,9 @@ int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb) return QLA_SUCCESS; queuing_error: + if (tot_dsds) + scsi_dma_unmap(cmd); - 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, srb->dma_handle, - cmd->request_bufflen, cmd->sc_data_direction); spin_unlock_irqrestore(&ha->hardware_lock, flags); return QLA_ERROR; |