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SPARC: sg chaining support

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

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-05-14 15:44:38 +02:00
parent 78bdc3106a
commit 0912a5db0e
5 changed files with 33 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

25
arch/sparc/kernel/ioport.c
View file

@ -35,6 +35,7 @@
#include <linux/slab.h>
#include <linux/pci.h> /* struct pci_dev */
#include <linux/proc_fs.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/vaddrs.h>
@ -717,19 +718,19 @@ void pci_unmap_page(struct pci_dev *hwdev,
* Device ownership issues as mentioned above for pci_map_single are
* the same here.
*/
int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
/* IIep is write-through, not flushing. */
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
sg->dvma_address =
virt_to_phys(page_address(sg->page)) + sg->offset;
sg->dvma_length = sg->length;
sg++;
}
return nents;
}
@ -738,19 +739,19 @@ int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
* Again, cpu read rules concerning calls here are the same as for
* pci_unmap_single() above.
*/
void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}
@ -789,34 +790,34 @@ void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t
* The same as pci_dma_sync_single_* but for a scatter-gather list,
* same rules and usage.
*/
void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}
void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
{
struct scatterlist *sg;
int n;
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
for (n = 0; n < nents; n++) {
for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg->page) == NULL);
mmu_inval_dma_area(
(unsigned long) page_address(sg->page),
(sg->length + PAGE_SIZE-1) & PAGE_MASK);
sg++;
}
}
}