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IA64: sg chaining support

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This updates the ia64 iommu/pci dma mappers to sg chaining.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2007-10-16 11:27:26 +02:00
parent 46856afa01
commit 9b6eccfccb
4 changed files with 16 additions and 13 deletions
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11
arch/ia64/sn/pci/pci_dma.c
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@@ -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,