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[SCSI] tmscsim: 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.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori 2007-05-26 02:41:54 +09:00 committed by James Bottomley
parent 70c8d89776
commit 85289f2efa
1 changed files with 23 additions and 38 deletions
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61
drivers/scsi/tmscsim.c
View File

@ -457,28 +457,21 @@ static int dc390_pci_map (struct dc390_srb* pSRB)
error = 1;
DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
/* Map SG list */
} else if (pcmd->use_sg) {
pSRB->pSegmentList = (struct scatterlist *) pcmd->request_buffer;
pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, pcmd->use_sg,
pcmd->sc_data_direction);
/* TODO: error handling */
if (!pSRB->SGcount)
error = 1;
DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
__FUNCTION__, pcmd->request_buffer, pSRB->SGcount, pcmd->use_sg));
/* Map single segment */
} else if (pcmd->request_buffer && pcmd->request_bufflen) {
pSRB->pSegmentList = dc390_sg_build_single(&pSRB->Segmentx, pcmd->request_buffer, pcmd->request_bufflen);
pSRB->SGcount = pci_map_sg(pdev, pSRB->pSegmentList, 1,
pcmd->sc_data_direction);
cmdp->saved_dma_handle = sg_dma_address(pSRB->pSegmentList);
} else if (scsi_sg_count(pcmd)) {
int nseg;
nseg = scsi_dma_map(pcmd);
pSRB->pSegmentList = scsi_sglist(pcmd);
pSRB->SGcount = nseg;
/* TODO: error handling */
if (pSRB->SGcount != 1)
if (nseg < 0)
error = 1;
DEBUG1(printk("%s(): Mapped request buffer %p at %x\n", __FUNCTION__, pcmd->request_buffer, cmdp->saved_dma_handle));
/* No mapping !? */
} else
DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
__FUNCTION__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
/* Map single segment */
} else
pSRB->SGcount = 0;
return error;
@ -494,12 +487,10 @@ static void dc390_pci_unmap (struct dc390_srb* pSRB)
if (pSRB->SRBFlag) {
pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
} else if (pcmd->use_sg) {
pci_unmap_sg(pdev, pcmd->request_buffer, pcmd->use_sg, pcmd->sc_data_direction);
DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n", __FUNCTION__, pcmd->request_buffer, pcmd->use_sg));
} else if (pcmd->request_buffer && pcmd->request_bufflen) {
pci_unmap_sg(pdev, &pSRB->Segmentx, 1, pcmd->sc_data_direction);
DEBUG1(printk("%s(): Unmapped request buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
} else {
scsi_dma_unmap(pcmd);
DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
__FUNCTION__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
}
}
@ -1153,9 +1144,9 @@ dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
struct scatterlist *psgl;
pSRB->TotalXferredLen = 0;
pSRB->SGIndex = 0;
if (pcmd->use_sg) {
if (scsi_sg_count(pcmd)) {
size_t saved;
pSRB->pSegmentList = (struct scatterlist *)pcmd->request_buffer;
pSRB->pSegmentList = scsi_sglist(pcmd);
psgl = pSRB->pSegmentList;
//dc390_pci_sync(pSRB);
@ -1179,12 +1170,6 @@ dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
} else if(pcmd->request_buffer) {
//dc390_pci_sync(pSRB);
sg_dma_len(&pSRB->Segmentx) = pcmd->request_bufflen - pSRB->Saved_Ptr;
pSRB->SGcount = 1;
pSRB->pSegmentList = (struct scatterlist *) &pSRB->Segmentx;
} else {
pSRB->SGcount = 0;
printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
@ -1612,7 +1597,7 @@ dc390_Reselect( struct dc390_acb* pACB )
if( !( pACB->scan_devices ) )
{
struct scsi_cmnd *pcmd = pSRB->pcmd;
pcmd->resid = pcmd->request_bufflen;
scsi_set_resid(pcmd, scsi_bufflen(pcmd));
SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
dc390_Going_remove(pDCB, pSRB);
dc390_Free_insert(pACB, pSRB);
@ -1695,7 +1680,7 @@ dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_
pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
pSRB->SRBFlag |= AUTO_REQSENSE;
pSRB->SavedSGCount = pcmd->use_sg;
pSRB->SavedSGCount = scsi_sg_count(pcmd);
pSRB->SavedTotXLen = pSRB->TotalXferredLen;
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
@ -1743,7 +1728,7 @@ dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb*
(u32) pcmd->result, (u32) pSRB->TotalXferredLen));
} else {
SET_RES_DRV(pcmd->result, DRIVER_SENSE);
pcmd->use_sg = pSRB->SavedSGCount;
scsi_sg_count(pcmd) = pSRB->SavedSGCount;
//pSRB->ScsiCmdLen = (u8) (pSRB->Segment1[0] >> 8);
DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
pSRB->TotalXferredLen = 0;
@ -1765,7 +1750,7 @@ dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb*
else if( status_byte(status) == QUEUE_FULL )
{
scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
pcmd->use_sg = pSRB->SavedSGCount;
scsi_sg_count(pcmd) = pSRB->SavedSGCount;
DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
pSRB->TotalXferredLen = 0;
SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
@ -1816,7 +1801,7 @@ dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb*
}
cmd_done:
pcmd->resid = pcmd->request_bufflen - pSRB->TotalXferredLen;
scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
dc390_Going_remove (pDCB, pSRB);
/* Add to free list */