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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-05-14 17:44:38 +0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-10-16 13:27:32 +0400 |
| commit | 0912a5db0ea45d8aef3ee99a882e093285e32c3c (patch) | |
| tree | eef222f8bce729c7bf0fa988e0c77918032f55a3 /arch/sparc/mm/io-unit.c | |
| parent | 78bdc3106a877cfa50439fa66b52acbc4e7868df (diff) | |
| download | linux-0912a5db0ea45d8aef3ee99a882e093285e32c3c.tar.xz | |
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>
Diffstat (limited to 'arch/sparc/mm/io-unit.c')
| -rw-r--r-- | arch/sparc/mm/io-unit.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/sparc/mm/io-unit.c b/arch/sparc/mm/io-unit.c index 7c89893b1fe8..375b4db63704 100644 --- a/arch/sparc/mm/io-unit.c +++ b/arch/sparc/mm/io-unit.c @@ -11,8 +11,8 @@ #include <linux/mm.h> #include <linux/highmem.h> /* pte_offset_map => kmap_atomic */ #include <linux/bitops.h> +#include <linux/scatterlist.h> -#include <asm/scatterlist.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> #include <asm/sbus.h> @@ -144,8 +144,9 @@ static void iounit_get_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_bus spin_lock_irqsave(&iounit->lock, flags); while (sz != 0) { --sz; - sg[sz].dvma_address = iounit_get_area(iounit, (unsigned long)page_address(sg[sz].page) + sg[sz].offset, sg[sz].length); - sg[sz].dvma_length = sg[sz].length; + sg->dvma_address = iounit_get_area(iounit, (unsigned long)page_address(sg->page) + sg->offset, sg->length); + sg->dvma_length = sg->length; + sg = sg_next(sg); } spin_unlock_irqrestore(&iounit->lock, flags); } @@ -173,11 +174,12 @@ static void iounit_release_scsi_sgl(struct scatterlist *sg, int sz, struct sbus_ spin_lock_irqsave(&iounit->lock, flags); while (sz != 0) { --sz; - len = ((sg[sz].dvma_address & ~PAGE_MASK) + sg[sz].length + (PAGE_SIZE-1)) >> PAGE_SHIFT; - vaddr = (sg[sz].dvma_address - IOUNIT_DMA_BASE) >> PAGE_SHIFT; + len = ((sg->dvma_address & ~PAGE_MASK) + sg->length + (PAGE_SIZE-1)) >> PAGE_SHIFT; + vaddr = (sg->dvma_address - IOUNIT_DMA_BASE) >> PAGE_SHIFT; IOD(("iounit_release %08lx-%08lx\n", (long)vaddr, (long)len+vaddr)); for (len += vaddr; vaddr < len; vaddr++) clear_bit(vaddr, iounit->bmap); + sg = sg_next(sg); } spin_unlock_irqrestore(&iounit->lock, flags); } |