[SCSI] mesh: 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>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index e64d1a1..651d09b 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -421,7 +421,7 @@
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 @@
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 @@
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 @@
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 @@
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;
}