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[SCSI] arcmsr: 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>
Acked-by: Nick Cheng <nick.cheng@areca.com.tw>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori 2007-05-14 19:25:56 +09:00 committed by James Bottomley
parent 22c1a6600a
commit deff2627cd
1 changed files with 30 additions and 71 deletions
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101
drivers/scsi/arcmsr/arcmsr_hba.c
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@ -369,19 +369,9 @@ static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
{
struct AdapterControlBlock *acb = ccb->acb;
struct scsi_cmnd *pcmd = ccb->pcmd;
if (pcmd->use_sg != 0) {
struct scatterlist *sl;
sl = (struct scatterlist *)pcmd->request_buffer;
pci_unmap_sg(acb->pdev, sl, pcmd->use_sg, pcmd->sc_data_direction);
}
else if (pcmd->request_bufflen != 0)
pci_unmap_single(acb->pdev,
pcmd->SCp.dma_handle,
pcmd->request_bufflen, pcmd->sc_data_direction);
scsi_dma_unmap(pcmd);
}
static void arcmsr_ccb_complete(struct CommandControlBlock *ccb, int stand_flag)
@ -551,6 +541,7 @@ static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
int8_t *psge = (int8_t *)&arcmsr_cdb->u;
uint32_t address_lo, address_hi;
int arccdbsize = 0x30;
int nseg;
ccb->pcmd = pcmd;
memset(arcmsr_cdb, 0, sizeof (struct ARCMSR_CDB));
@ -561,20 +552,20 @@ static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
arcmsr_cdb->CdbLength = (uint8_t)pcmd->cmd_len;
arcmsr_cdb->Context = (unsigned long)arcmsr_cdb;
memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
if (pcmd->use_sg) {
int length, sgcount, i, cdb_sgcount = 0;
struct scatterlist *sl;
/* Get Scatter Gather List from scsiport. */
sl = (struct scatterlist *) pcmd->request_buffer;
sgcount = pci_map_sg(acb->pdev, sl, pcmd->use_sg,
pcmd->sc_data_direction);
nseg = scsi_dma_map(pcmd);
BUG_ON(nseg < 0);
if (nseg) {
int length, i, cdb_sgcount = 0;
struct scatterlist *sg;
/* map stor port SG list to our iop SG List. */
for (i = 0; i < sgcount; i++) {
scsi_for_each_sg(pcmd, sg, nseg, i) {
/* Get the physical address of the current data pointer */
length = cpu_to_le32(sg_dma_len(sl));
address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sl)));
address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sl)));
length = cpu_to_le32(sg_dma_len(sg));
address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sg)));
address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sg)));
if (address_hi == 0) {
struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
@ -591,32 +582,12 @@ static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
psge += sizeof (struct SG64ENTRY);
arccdbsize += sizeof (struct SG64ENTRY);
}
sl++;
cdb_sgcount++;
}
arcmsr_cdb->sgcount = (uint8_t)cdb_sgcount;
arcmsr_cdb->DataLength = pcmd->request_bufflen;
arcmsr_cdb->DataLength = scsi_bufflen(pcmd);
if ( arccdbsize > 256)
arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
} else if (pcmd->request_bufflen) {
dma_addr_t dma_addr;
dma_addr = pci_map_single(acb->pdev, pcmd->request_buffer,
pcmd->request_bufflen, pcmd->sc_data_direction);
pcmd->SCp.dma_handle = dma_addr;
address_lo = cpu_to_le32(dma_addr_lo32(dma_addr));
address_hi = cpu_to_le32(dma_addr_hi32(dma_addr));
if (address_hi == 0) {
struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
pdma_sg->address = address_lo;
pdma_sg->length = pcmd->request_bufflen;
} else {
struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
pdma_sg->addresshigh = address_hi;
pdma_sg->address = address_lo;
pdma_sg->length = pcmd->request_bufflen|IS_SG64_ADDR;
}
arcmsr_cdb->sgcount = 1;
arcmsr_cdb->DataLength = pcmd->request_bufflen;
}
if (pcmd->sc_data_direction == DMA_TO_DEVICE ) {
arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
@ -848,24 +819,21 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_
struct CMD_MESSAGE_FIELD *pcmdmessagefld;
int retvalue = 0, transfer_len = 0;
char *buffer;
struct scatterlist *sg;
uint32_t controlcode = (uint32_t ) cmd->cmnd[5] << 24 |
(uint32_t ) cmd->cmnd[6] << 16 |
(uint32_t ) cmd->cmnd[7] << 8 |
(uint32_t ) cmd->cmnd[8];
/* 4 bytes: Areca io control code */
if (cmd->use_sg) {
struct scatterlist *sg = (struct scatterlist *)cmd->request_buffer;
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
if (cmd->use_sg > 1) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
transfer_len += sg->length;
} else {
buffer = cmd->request_buffer;
transfer_len = cmd->request_bufflen;
sg = scsi_sglist(cmd);
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
if (scsi_sg_count(cmd) > 1) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
transfer_len += sg->length;
if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
@ -1057,12 +1025,9 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_
retvalue = ARCMSR_MESSAGE_FAIL;
}
message_out:
if (cmd->use_sg) {
struct scatterlist *sg;
sg = scsi_sglist(cmd);
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
}
return retvalue;
}
@ -1085,6 +1050,7 @@ static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
case INQUIRY: {
unsigned char inqdata[36];
char *buffer;
struct scatterlist *sg;
if (cmd->device->lun) {
cmd->result = (DID_TIME_OUT << 16);
@ -1104,21 +1070,14 @@ static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
strncpy(&inqdata[16], "RAID controller ", 16);
/* Product Identification */
strncpy(&inqdata[32], "R001", 4); /* Product Revision */
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
} else {
buffer = cmd->request_buffer;
}
sg = scsi_sglist(cmd);
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
memcpy(buffer, inqdata, sizeof(inqdata));
if (cmd->use_sg) {
struct scatterlist *sg;
sg = scsi_sglist(cmd);
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
}
cmd->scsi_done(cmd);
}
break;