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author | Muli Ben-Yehuda <mulix@mulix.org> | 2006-01-11 21:44:42 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-12 03:04:55 (GMT) |
commit | 17a941d854a3f7b0bb916fdeee4c9ffdcc19d8d3 (patch) | |
tree | b6b3b55318336adf769bf57141a01a9defbbb202 /include/asm-x86_64/swiotlb.h | |
parent | 8a6fdd3e912e0ce6f723431d66baf704bf8a1d26 (diff) | |
download | linux-fsl-qoriq-17a941d854a3f7b0bb916fdeee4c9ffdcc19d8d3.tar.xz |
[PATCH] x86_64: Use function pointers to call DMA mapping functions
AK: I hacked Muli's original patch a lot and there were a lot
of changes - all bugs are probably to blame on me now.
There were also some changes in the fall back behaviour
for swiotlb - in particular it doesn't try to use GFP_DMA
now anymore. Also all DMA mapping operations use the
same core dma_alloc_coherent code with proper fallbacks now.
And various other changes and cleanups.
Known problems: iommu=force swiotlb=force together breaks
needs more testing.
This patch cleans up x86_64's DMA mapping dispatching code. Right now
we have three possible IOMMU types: AGP GART, swiotlb and nommu, and
in the future we will also have Xen's x86_64 swiotlb and other HW
IOMMUs for x86_64. In order to support all of them cleanly, this
patch:
- introduces a struct dma_mapping_ops with function pointers for each
of the DMA mapping operations of gart (AMD HW IOMMU), swiotlb
(software IOMMU) and nommu (no IOMMU).
- gets rid of:
if (swiotlb)
return swiotlb_xxx();
- PCI_DMA_BUS_IS_PHYS is now checked against the dma_ops being set
This makes swiotlb faster by avoiding double copying in some cases.
Signed-Off-By: Muli Ben-Yehuda <mulix@mulix.org>
Signed-Off-By: Jon D. Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/swiotlb.h')
-rw-r--r-- | include/asm-x86_64/swiotlb.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/include/asm-x86_64/swiotlb.h b/include/asm-x86_64/swiotlb.h index dddf1b2..60757ef 100644 --- a/include/asm-x86_64/swiotlb.h +++ b/include/asm-x86_64/swiotlb.h @@ -3,10 +3,14 @@ #include <linux/config.h> +#include <asm/dma-mapping.h> + /* SWIOTLB interface */ -extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, - int dir); +extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, + size_t size, int dir); +extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size, + dma_addr_t *dma_handle, gfp_t flags); extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size, int dir); extern void swiotlb_sync_single_for_cpu(struct device *hwdev, @@ -34,10 +38,10 @@ extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction); extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr); -extern void *swiotlb_alloc_coherent (struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t flags); extern void swiotlb_free_coherent (struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle); +extern int swiotlb_dma_supported(struct device *hwdev, u64 mask); +extern void swiotlb_init(void); #ifdef CONFIG_SWIOTLB extern int swiotlb; @@ -45,4 +49,6 @@ extern int swiotlb; #define swiotlb 0 #endif -#endif +extern void pci_swiotlb_init(void); + +#endif /* _ASM_SWTIOLB_H */ |