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Message-Id: <1179304354658-git-send-email-jens.axboe@oracle.com>
Date: Wed, 16 May 2007 10:32:26 +0200
From: Jens Axboe <jens.axboe@...cle.com>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <jens.axboe@...cle.com>
Subject: [PATCH 12/19] IA64: sg chaining support
This updates the ia64 iommu/pci dma mappers to sg chaining.
Signed-off-by: Jens Axboe <jens.axboe@...cle.com>
---
arch/ia64/hp/common/sba_iommu.c | 14 +++++++-------
arch/ia64/sn/pci/pci_dma.c | 11 ++++++-----
include/asm-ia64/dma-mapping.h | 1 +
include/asm-ia64/scatterlist.h | 2 ++
4 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index c1dca22..f6d15cf 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -393,7 +393,7 @@ sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
printk(KERN_DEBUG " %d : DMA %08lx/%05x CPU %p\n", nents,
startsg->dma_address, startsg->dma_length,
sba_sg_address(startsg));
- startsg++;
+ startsg = sg_next(startsg);
}
}
@@ -406,7 +406,7 @@ sba_check_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
while (the_nents-- > 0) {
if (sba_sg_address(the_sg) == 0x0UL)
sba_dump_sg(NULL, startsg, nents);
- the_sg++;
+ the_sg = sg_next(the_sg);
}
}
@@ -1198,7 +1198,7 @@ sba_fill_pdir(
u32 pide = startsg->dma_address & ~PIDE_FLAG;
dma_offset = (unsigned long) pide & ~iovp_mask;
startsg->dma_address = 0;
- dma_sg++;
+ dma_sg = sg_next(dma_sg);
dma_sg->dma_address = pide | ioc->ibase;
pdirp = &(ioc->pdir_base[pide >> iovp_shift]);
n_mappings++;
@@ -1225,7 +1225,7 @@ sba_fill_pdir(
pdirp++;
} while (cnt > 0);
}
- startsg++;
+ startsg = sg_next(startsg);
}
/* force pdir update */
wmb();
@@ -1294,7 +1294,7 @@ sba_coalesce_chunks( struct ioc *ioc,
while (--nents > 0) {
unsigned long vaddr; /* tmp */
- startsg++;
+ startsg = sg_next(startsg);
/* PARANOID */
startsg->dma_address = startsg->dma_length = 0;
@@ -1404,7 +1404,7 @@ int sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, int di
#ifdef ALLOW_IOV_BYPASS_SG
ASSERT(to_pci_dev(dev)->dma_mask);
if (likely((ioc->dma_mask & ~to_pci_dev(dev)->dma_mask) == 0)) {
- for (sg = sglist ; filled < nents ; filled++, sg++){
+ for_each_sg(sglist, sg, nents, filled) {
sg->dma_length = sg->length;
sg->dma_address = virt_to_phys(sba_sg_address(sg));
}
@@ -1498,7 +1498,7 @@ void sba_unmap_sg (struct device *dev, struct scatterlist *sglist, int nents, in
while (nents && sglist->dma_length) {
sba_unmap_single(dev, sglist->dma_address, sglist->dma_length, dir);
- sglist++;
+ sglist = sg_next(sglist);
nents--;
}
diff --git a/arch/ia64/sn/pci/pci_dma.c b/arch/ia64/sn/pci/pci_dma.c
index 7a291a2..fde6073 100644
--- a/arch/ia64/sn/pci/pci_dma.c
+++ b/arch/ia64/sn/pci/pci_dma.c
@@ -218,16 +218,17 @@ EXPORT_SYMBOL(sn_dma_unmap_single);
*
* Unmap a set of streaming mode DMA translations.
*/
-void sn_dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+void sn_dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
int nhwentries, int direction)
{
int i;
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
+ struct scatterlist *sg;
BUG_ON(dev->bus != &pci_bus_type);
- for (i = 0; i < nhwentries; i++, sg++) {
+ for_each_sg(sgl, sg, nhwentries, i) {
provider->dma_unmap(pdev, sg->dma_address, direction);
sg->dma_address = (dma_addr_t) NULL;
sg->dma_length = 0;
@@ -244,11 +245,11 @@ EXPORT_SYMBOL(sn_dma_unmap_sg);
*
* Maps each entry of @sg for DMA.
*/
-int sn_dma_map_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+int sn_dma_map_sg(struct device *dev, struct scatterlist *sgl, int nhwentries,
int direction)
{
unsigned long phys_addr;
- struct scatterlist *saved_sg = sg;
+ struct scatterlist *saved_sg = sgl, *sg;
struct pci_dev *pdev = to_pci_dev(dev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
int i;
@@ -258,7 +259,7 @@ int sn_dma_map_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
/*
* Setup a DMA address for each entry in the scatterlist.
*/
- for (i = 0; i < nhwentries; i++, sg++) {
+ for_each_sg(sgl, sg, nhwentries, i) {
phys_addr = SG_ENT_PHYS_ADDRESS(sg);
sg->dma_address = provider->dma_map(pdev,
phys_addr, sg->length,
diff --git a/include/asm-ia64/dma-mapping.h b/include/asm-ia64/dma-mapping.h
index 6299b51..aeba8da 100644
--- a/include/asm-ia64/dma-mapping.h
+++ b/include/asm-ia64/dma-mapping.h
@@ -5,6 +5,7 @@
* Copyright (C) 2003-2004 Hewlett-Packard Co
* David Mosberger-Tang <davidm@....hp.com>
*/
+#include <linux/scatterlist.h>
#include <asm/machvec.h>
#define dma_alloc_coherent platform_dma_alloc_coherent
diff --git a/include/asm-ia64/scatterlist.h b/include/asm-ia64/scatterlist.h
index a452ea2..7d5234d 100644
--- a/include/asm-ia64/scatterlist.h
+++ b/include/asm-ia64/scatterlist.h
@@ -30,4 +30,6 @@ struct scatterlist {
#define sg_dma_len(sg) ((sg)->dma_length)
#define sg_dma_address(sg) ((sg)->dma_address)
+#define ARCH_HAS_SG_CHAIN
+
#endif /* _ASM_IA64_SCATTERLIST_H */
--
1.5.2.rc1
-
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