SPARC: sg chaining support
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>
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 62182d2..9c3ed88 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -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 @@
* 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 @@
* 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 @@
* 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++;
}
}
}