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Message-Id: <11845792684097-git-send-email-jens.axboe@oracle.com>
Date: Mon, 16 Jul 2007 11:47:39 +0200
From: Jens Axboe <jens.axboe@...cle.com>
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Cc: Jens Axboe <jens.axboe@...cle.com>, achim_leubner@...ptec.com
Subject: [PATCH 25/33] gdth: sg chaining support
Cc: achim_leubner@...ptec.com
Signed-off-by: Jens Axboe <jens.axboe@...cle.com>
---
drivers/scsi/gdth.c | 45 +++++++++++++++++++++++----------------------
1 files changed, 23 insertions(+), 22 deletions(-)
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index d0b95ce..7225c95 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -2656,7 +2656,7 @@ static void gdth_copy_internal_data(int hanum,Scsi_Cmnd *scp,
{
ushort cpcount,i;
ushort cpsum,cpnow;
- struct scatterlist *sl;
+ struct scatterlist *sl, *sg;
gdth_ha_str *ha;
char *address;
@@ -2665,29 +2665,30 @@ static void gdth_copy_internal_data(int hanum,Scsi_Cmnd *scp,
if (scp->use_sg) {
sl = (struct scatterlist *)scp->request_buffer;
- for (i=0,cpsum=0; i<scp->use_sg; ++i,++sl) {
+ cpsum = 0;
+ for_each_sg(sl, sg, scp->use_sg, i) {
unsigned long flags;
- cpnow = (ushort)sl->length;
+ cpnow = (ushort)sg->length;
TRACE(("copy_internal() now %d sum %d count %d %d\n",
cpnow,cpsum,cpcount,(ushort)scp->bufflen));
if (cpsum+cpnow > cpcount)
cpnow = cpcount - cpsum;
cpsum += cpnow;
- if (!sl->page) {
+ if (!sg->page) {
printk("GDT-HA %d: invalid sc/gt element in gdth_copy_internal_data()\n",
hanum);
return;
}
local_irq_save(flags);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
- address = kmap_atomic(sl->page, KM_BIO_SRC_IRQ) + sl->offset;
+ address = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
memcpy(address,buffer,cpnow);
- flush_dcache_page(sl->page);
+ flush_dcache_page(sg->page);
kunmap_atomic(address, KM_BIO_SRC_IRQ);
#else
- address = kmap_atomic(sl->page, KM_BH_IRQ) + sl->offset;
+ address = kmap_atomic(sg->page, KM_BH_IRQ) + sg->offset;
memcpy(address,buffer,cpnow);
- flush_dcache_page(sl->page);
+ flush_dcache_page(sg->page);
kunmap_atomic(address, KM_BH_IRQ);
#endif
local_irq_restore(flags);
@@ -2807,7 +2808,7 @@ static int gdth_fill_cache_cmd(int hanum,Scsi_Cmnd *scp,ushort hdrive)
{
register gdth_ha_str *ha;
register gdth_cmd_str *cmdp;
- struct scatterlist *sl;
+ struct scatterlist *sl, *sg;
ulong32 cnt, blockcnt;
ulong64 no, blockno;
dma_addr_t phys_addr;
@@ -2913,25 +2914,25 @@ static int gdth_fill_cache_cmd(int hanum,Scsi_Cmnd *scp,ushort hdrive)
if (mode64) {
cmdp->u.cache64.DestAddr= (ulong64)-1;
cmdp->u.cache64.sg_canz = sgcnt;
- for (i=0; i<sgcnt; ++i,++sl) {
- cmdp->u.cache64.sg_lst[i].sg_ptr = sg_dma_address(sl);
+ for_each_sg(sl, sg, sgcnt, i) {
+ cmdp->u.cache64.sg_lst[i].sg_ptr = sg_dma_address(sg);
#ifdef GDTH_DMA_STATISTICS
if (cmdp->u.cache64.sg_lst[i].sg_ptr > (ulong64)0xffffffff)
ha->dma64_cnt++;
else
ha->dma32_cnt++;
#endif
- cmdp->u.cache64.sg_lst[i].sg_len = sg_dma_len(sl);
+ cmdp->u.cache64.sg_lst[i].sg_len = sg_dma_len(sg);
}
} else {
cmdp->u.cache.DestAddr= 0xffffffff;
cmdp->u.cache.sg_canz = sgcnt;
- for (i=0; i<sgcnt; ++i,++sl) {
- cmdp->u.cache.sg_lst[i].sg_ptr = sg_dma_address(sl);
+ for_each_sg(sl, sg, sgcnt, i) {
+ cmdp->u.cache.sg_lst[i].sg_ptr = sg_dma_address(sg);
#ifdef GDTH_DMA_STATISTICS
ha->dma32_cnt++;
#endif
- cmdp->u.cache.sg_lst[i].sg_len = sg_dma_len(sl);
+ cmdp->u.cache.sg_lst[i].sg_len = sg_dma_len(sg);
}
}
@@ -3017,7 +3018,7 @@ static int gdth_fill_raw_cmd(int hanum,Scsi_Cmnd *scp,unchar b)
{
register gdth_ha_str *ha;
register gdth_cmd_str *cmdp;
- struct scatterlist *sl;
+ struct scatterlist *sl, *sg;
ushort i;
dma_addr_t phys_addr, sense_paddr;
int cmd_index, sgcnt, mode64;
@@ -3120,25 +3121,25 @@ static int gdth_fill_raw_cmd(int hanum,Scsi_Cmnd *scp,unchar b)
if (mode64) {
cmdp->u.raw64.sdata = (ulong64)-1;
cmdp->u.raw64.sg_ranz = sgcnt;
- for (i=0; i<sgcnt; ++i,++sl) {
- cmdp->u.raw64.sg_lst[i].sg_ptr = sg_dma_address(sl);
+ for_each_sg(sl, sg, sgcnt, i) {
+ cmdp->u.raw64.sg_lst[i].sg_ptr = sg_dma_address(sg);
#ifdef GDTH_DMA_STATISTICS
if (cmdp->u.raw64.sg_lst[i].sg_ptr > (ulong64)0xffffffff)
ha->dma64_cnt++;
else
ha->dma32_cnt++;
#endif
- cmdp->u.raw64.sg_lst[i].sg_len = sg_dma_len(sl);
+ cmdp->u.raw64.sg_lst[i].sg_len = sg_dma_len(sg);
}
} else {
cmdp->u.raw.sdata = 0xffffffff;
cmdp->u.raw.sg_ranz = sgcnt;
- for (i=0; i<sgcnt; ++i,++sl) {
- cmdp->u.raw.sg_lst[i].sg_ptr = sg_dma_address(sl);
+ for_each_sg(sl, sg, sgcnt, i) {
+ cmdp->u.raw.sg_lst[i].sg_ptr = sg_dma_address(sg);
#ifdef GDTH_DMA_STATISTICS
ha->dma32_cnt++;
#endif
- cmdp->u.raw.sg_lst[i].sg_len = sg_dma_len(sl);
+ cmdp->u.raw.sg_lst[i].sg_len = sg_dma_len(sg);
}
}
--
1.5.3.rc0.90.gbaa79
-
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