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[SCSI] initio: convert to use the data buffer accessors

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- 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>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori 2007-05-21 14:58:30 +09:00 committed by James Bottomley
parent c66cc13c16
commit a258c85d08
1 changed files with 11 additions and 25 deletions
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36
drivers/scsi/initio.c
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@ -2563,7 +2563,7 @@ static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * c
{ /* Create corresponding SCB */
struct scatterlist *sglist;
struct sg_entry *sg; /* Pointer to SG list */
int i;
int i, nseg;
long total_len;
dma_addr_t dma_addr;
@ -2600,34 +2600,26 @@ static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * c
}
/* todo handle map_sg error */
if (cmnd->use_sg) {
nseg = scsi_dma_map(cmnd);
BUG_ON(nseg < 0);
if (nseg) {
dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
DMA_BIDIRECTIONAL);
cblk->bufptr = cpu_to_le32((u32)dma_addr);
cmnd->SCp.dma_handle = dma_addr;
sglist = (struct scatterlist *) cmnd->request_buffer;
cblk->sglen = dma_map_sg(&host->pci_dev->dev, sglist,
cmnd->use_sg, cmnd->sc_data_direction);
cblk->flags |= SCF_SG; /* Turn on SG list flag */
for (i = 0, total_len = 0, sg = &cblk->sglist[0]; /* 1.01g */
i < cblk->sglen; i++, sg++, sglist++) {
total_len = 0;
sg = &cblk->sglist[0];
scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
total_len += sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
}
cblk->buflen = (cmnd->request_bufflen > total_len) ?
total_len : cmnd->request_bufflen;
} else if (cmnd->request_bufflen) { /* Non SG */
dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->request_buffer,
cmnd->request_bufflen,
cmnd->sc_data_direction);
cmnd->SCp.dma_handle = dma_addr;
cblk->bufptr = cpu_to_le32((u32)dma_addr);
cblk->buflen = cpu_to_le32((u32)cmnd->request_bufflen);
cblk->sglen = 0;
cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
total_len : scsi_bufflen(cmnd);
} else { /* No data transfer required */
cblk->buflen = 0;
cblk->sglen = 0;
@ -2750,18 +2742,12 @@ static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
}
/* request buffer */
if (cmnd->use_sg) {
if (scsi_sg_count(cmnd)) {
dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
DMA_BIDIRECTIONAL);
dma_unmap_sg(&pci_dev->dev, cmnd->request_buffer,
cmnd->use_sg,
cmnd->sc_data_direction);
} else if (cmnd->request_bufflen) {
dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
cmnd->request_bufflen,
cmnd->sc_data_direction);
scsi_dma_unmap(cmnd);
}
}