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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2007-05-26 07:46:30 +0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-05-27 04:07:50 +0400
commit646158c203ae8e76a44bb38634fc82f2da041824 (patch)
tree74597092d705d7581d06fdeee37bdc1d9a74569d /drivers/scsi/mac53c94.c
parent5f60ef6ac7b6338ec9e82a0900185d554f476243 (diff)
downloadlinux-646158c203ae8e76a44bb38634fc82f2da041824.tar.xz
[SCSI] mac53c94: 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> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/mac53c94.c')
-rw-r--r--drivers/scsi/mac53c94.c62
1 files changed, 21 insertions, 41 deletions
diff --git a/drivers/scsi/mac53c94.c b/drivers/scsi/mac53c94.c
index 5806ede120a4..b12ad7c7c673 100644
--- a/drivers/scsi/mac53c94.c
+++ b/drivers/scsi/mac53c94.c
@@ -77,7 +77,7 @@ static int mac53c94_queue(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *
for (i = 0; i < cmd->cmd_len; ++i)
printk(" %.2x", cmd->cmnd[i]);
printk("\n" KERN_DEBUG "use_sg=%d request_bufflen=%d request_buffer=%p\n",
- cmd->use_sg, cmd->request_bufflen, cmd->request_buffer);
+ scsi_sg_count(cmd), scsi_bufflen(cmd), scsi_sglist(cmd));
}
#endif
@@ -173,8 +173,7 @@ static void mac53c94_start(struct fsc_state *state)
writeb(CMD_SELECT, &regs->command);
state->phase = selecting;
- if (cmd->use_sg > 0 || cmd->request_bufflen != 0)
- set_dma_cmds(state, cmd);
+ set_dma_cmds(state, cmd);
}
static irqreturn_t do_mac53c94_interrupt(int irq, void *dev_id)
@@ -262,7 +261,7 @@ static void mac53c94_interrupt(int irq, void *dev_id)
writeb(CMD_NOP, &regs->command);
/* set DMA controller going if any data to transfer */
if ((stat & (STAT_MSG|STAT_CD)) == 0
- && (cmd->use_sg > 0 || cmd->request_bufflen != 0)) {
+ && (scsi_sg_count(cmd) > 0 || scsi_bufflen(cmd))) {
nb = cmd->SCp.this_residual;
if (nb > 0xfff0)
nb = 0xfff0;
@@ -310,14 +309,7 @@ static void mac53c94_interrupt(int irq, void *dev_id)
printk(KERN_DEBUG "intr %x before data xfer complete\n", intr);
}
writel(RUN << 16, &dma->control); /* stop dma */
- if (cmd->use_sg != 0) {
- pci_unmap_sg(state->pdev,
- (struct scatterlist *)cmd->request_buffer,
- cmd->use_sg, cmd->sc_data_direction);
- } else {
- pci_unmap_single(state->pdev, state->dma_addr,
- cmd->request_bufflen, cmd->sc_data_direction);
- }
+ scsi_dma_unmap(cmd);
/* should check dma status */
writeb(CMD_I_COMPLETE, &regs->command);
state->phase = completing;
@@ -365,47 +357,35 @@ static void cmd_done(struct fsc_state *state, int result)
*/
static void set_dma_cmds(struct fsc_state *state, struct scsi_cmnd *cmd)
{
- int i, dma_cmd, total;
+ int i, dma_cmd, total, nseg;
struct scatterlist *scl;
struct dbdma_cmd *dcmds;
dma_addr_t dma_addr;
u32 dma_len;
+ nseg = scsi_dma_map(cmd);
+ BUG_ON(nseg < 0);
+ if (!nseg)
+ return;
+
dma_cmd = cmd->sc_data_direction == DMA_TO_DEVICE ?
OUTPUT_MORE : INPUT_MORE;
dcmds = state->dma_cmds;
- if (cmd->use_sg > 0) {
- int nseg;
-
- total = 0;
- scl = (struct scatterlist *) cmd->request_buffer;
- nseg = pci_map_sg(state->pdev, scl, cmd->use_sg,
- cmd->sc_data_direction);
- for (i = 0; i < nseg; ++i) {
- dma_addr = sg_dma_address(scl);
- dma_len = sg_dma_len(scl);
- if (dma_len > 0xffff)
- panic("mac53c94: scatterlist element >= 64k");
- total += dma_len;
- st_le16(&dcmds->req_count, dma_len);
- st_le16(&dcmds->command, dma_cmd);
- st_le32(&dcmds->phy_addr, dma_addr);
- dcmds->xfer_status = 0;
- ++scl;
- ++dcmds;
- }
- } else {
- total = cmd->request_bufflen;
- if (total > 0xffff)
- panic("mac53c94: transfer size >= 64k");
- dma_addr = pci_map_single(state->pdev, cmd->request_buffer,
- total, cmd->sc_data_direction);
- state->dma_addr = dma_addr;
- st_le16(&dcmds->req_count, total);
+ total = 0;
+
+ scsi_for_each_sg(cmd, scl, nseg, i) {
+ dma_addr = sg_dma_address(scl);
+ dma_len = sg_dma_len(scl);
+ if (dma_len > 0xffff)
+ panic("mac53c94: scatterlist element >= 64k");
+ total += dma_len;
+ st_le16(&dcmds->req_count, dma_len);
+ st_le16(&dcmds->command, dma_cmd);
st_le32(&dcmds->phy_addr, dma_addr);
dcmds->xfer_status = 0;
++dcmds;
}
+
dma_cmd += OUTPUT_LAST - OUTPUT_MORE;
st_le16(&dcmds[-1].command, dma_cmd);
st_le16(&dcmds->command, DBDMA_STOP);