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[SCSI] mesh: 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: Paul Mackerras <paulus@samba.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori 2007-05-26 13:07:28 +09:00 committed by James Bottomley
parent d8196ed218
commit f0002c4e1f
1 changed files with 19 additions and 27 deletions
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46
drivers/scsi/mesh.c
View file

@ -421,7 +421,7 @@ static void mesh_start_cmd(struct mesh_state *ms, struct scsi_cmnd *cmd)
for (i = 0; i < cmd->cmd_len; ++i)
printk(" %x", cmd->cmnd[i]);
printk(" use_sg=%d buffer=%p bufflen=%u\n",
cmd->use_sg, cmd->request_buffer, cmd->request_bufflen);
scsi_sg_count(cmd), scsi_sglist(cmd), scsi_bufflen(cmd));
}
#endif
if (ms->dma_started)
@ -602,13 +602,16 @@ static void mesh_done(struct mesh_state *ms, int start_next)
cmd->result += (cmd->SCp.Message << 8);
if (DEBUG_TARGET(cmd)) {
printk(KERN_DEBUG "mesh_done: result = %x, data_ptr=%d, buflen=%d\n",
cmd->result, ms->data_ptr, cmd->request_bufflen);
cmd->result, ms->data_ptr, scsi_bufflen(cmd));
#if 0
/* needs to use sg? */
if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12 || cmd->cmnd[0] == 3)
&& cmd->request_buffer != 0) {
unsigned char *b = cmd->request_buffer;
printk(KERN_DEBUG "buffer = %x %x %x %x %x %x %x %x\n",
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
}
#endif
}
cmd->SCp.this_residual -= ms->data_ptr;
mesh_completed(ms, cmd);
@ -1265,15 +1268,18 @@ static void set_dma_cmds(struct mesh_state *ms, struct scsi_cmnd *cmd)
dcmds = ms->dma_cmds;
dtot = 0;
if (cmd) {
cmd->SCp.this_residual = cmd->request_bufflen;
if (cmd->use_sg > 0) {
int nseg;
int nseg;
cmd->SCp.this_residual = scsi_bufflen(cmd);
nseg = scsi_dma_map(cmd);
BUG_ON(nseg < 0);
if (nseg) {
total = 0;
scl = (struct scatterlist *) cmd->request_buffer;
off = ms->data_ptr;
nseg = pci_map_sg(ms->pdev, scl, cmd->use_sg,
cmd->sc_data_direction);
for (i = 0; i <nseg; ++i, ++scl) {
scsi_for_each_sg(cmd, scl, nseg, i) {
u32 dma_addr = sg_dma_address(scl);
u32 dma_len = sg_dma_len(scl);
@ -1292,16 +1298,6 @@ static void set_dma_cmds(struct mesh_state *ms, struct scsi_cmnd *cmd)
dtot += dma_len - off;
off = 0;
}
} else if (ms->data_ptr < cmd->request_bufflen) {
dtot = cmd->request_bufflen - ms->data_ptr;
if (dtot > 0xffff)
panic("mesh: transfer size >= 64k");
st_le16(&dcmds->req_count, dtot);
/* XXX Use pci DMA API here ... */
st_le32(&dcmds->phy_addr,
virt_to_phys(cmd->request_buffer) + ms->data_ptr);
dcmds->xfer_status = 0;
++dcmds;
}
}
if (dtot == 0) {
@ -1356,18 +1352,14 @@ static void halt_dma(struct mesh_state *ms)
dumplog(ms, ms->conn_tgt);
dumpslog(ms);
#endif /* MESH_DBG */
} else if (cmd && cmd->request_bufflen != 0 &&
ms->data_ptr > cmd->request_bufflen) {
} else if (cmd && scsi_bufflen(cmd) &&
ms->data_ptr > scsi_bufflen(cmd)) {
printk(KERN_DEBUG "mesh: target %d overrun, "
"data_ptr=%x total=%x goes_out=%d\n",
ms->conn_tgt, ms->data_ptr, cmd->request_bufflen,
ms->conn_tgt, ms->data_ptr, scsi_bufflen(cmd),
ms->tgts[ms->conn_tgt].data_goes_out);
}
if (cmd->use_sg != 0) {
struct scatterlist *sg;
sg = (struct scatterlist *)cmd->request_buffer;
pci_unmap_sg(ms->pdev, sg, cmd->use_sg, cmd->sc_data_direction);
}
scsi_dma_unmap(cmd);
ms->dma_started = 0;
}