diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-07 05:20:54 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-07 05:20:54 +0300 |
commit | f72e24a1240b78f421649c4d88f5c24ab1c896a1 (patch) | |
tree | 90bed3bf33ae0abf5636dafcc3eda3cc354612b0 /lib | |
parent | 2c669275dc3245e2866a0eea15bda8ec8d1ab8db (diff) | |
parent | 1655cf8829d82d367d8fdb5cb58e5885d7d2a391 (diff) |
Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping infrastructure from Christoph Hellwig:
"This is the first pull request for the new dma-mapping subsystem
In this new subsystem we'll try to properly maintain all the generic
code related to dma-mapping, and will further consolidate arch code
into common helpers.
This pull request contains:
- removal of the DMA_ERROR_CODE macro, replacing it with calls to
->mapping_error so that the dma_map_ops instances are more self
contained and can be shared across architectures (me)
- removal of the ->set_dma_mask method, which duplicates the
->dma_capable one in terms of functionality, but requires more
duplicate code.
- various updates for the coherent dma pool and related arm code
(Vladimir)
- various smaller cleanups (me)"
* tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits)
ARM: dma-mapping: Remove traces of NOMMU code
ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus
ARM: NOMMU: Introduce dma operations for noMMU
drivers: dma-mapping: allow dma_common_mmap() for NOMMU
drivers: dma-coherent: Introduce default DMA pool
drivers: dma-coherent: Account dma_pfn_offset when used with device tree
dma: Take into account dma_pfn_offset
dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs
dma-mapping: remove dmam_free_noncoherent
crypto: qat - avoid an uninitialized variable warning
au1100fb: remove a bogus dma_free_nonconsistent call
MAINTAINERS: add entry for dma mapping helpers
powerpc: merge __dma_set_mask into dma_set_mask
dma-mapping: remove the set_dma_mask method
powerpc/cell: use the dma_supported method for ops switching
powerpc/cell: clean up fixed mapping dma_ops initialization
tile: remove dma_supported and mapping_error methods
xen-swiotlb: remove xen_swiotlb_set_dma_mask
arm: implement ->dma_supported instead of ->set_dma_mask
mips/loongson64: implement ->dma_supported instead of ->set_dma_mask
...
Diffstat (limited to 'lib')
-rw-r--r-- | lib/dma-noop.c | 21 | ||||
-rw-r--r-- | lib/dma-virt.c | 12 |
2 files changed, 6 insertions, 27 deletions
diff --git a/lib/dma-noop.c b/lib/dma-noop.c index de26c8b68f34..acc4190e2731 100644 --- a/lib/dma-noop.c +++ b/lib/dma-noop.c @@ -7,6 +7,7 @@ #include <linux/mm.h> #include <linux/dma-mapping.h> #include <linux/scatterlist.h> +#include <linux/pfn.h> static void *dma_noop_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, @@ -16,7 +17,8 @@ static void *dma_noop_alloc(struct device *dev, size_t size, ret = (void *)__get_free_pages(gfp, get_order(size)); if (ret) - *dma_handle = virt_to_phys(ret); + *dma_handle = virt_to_phys(ret) - PFN_PHYS(dev->dma_pfn_offset); + return ret; } @@ -32,7 +34,7 @@ static dma_addr_t dma_noop_map_page(struct device *dev, struct page *page, enum dma_data_direction dir, unsigned long attrs) { - return page_to_phys(page) + offset; + return page_to_phys(page) + offset - PFN_PHYS(dev->dma_pfn_offset); } static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents, @@ -43,34 +45,23 @@ static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nent struct scatterlist *sg; for_each_sg(sgl, sg, nents, i) { + dma_addr_t offset = PFN_PHYS(dev->dma_pfn_offset); void *va; BUG_ON(!sg_page(sg)); va = sg_virt(sg); - sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va); + sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va) - offset; sg_dma_len(sg) = sg->length; } return nents; } -static int dma_noop_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return 0; -} - -static int dma_noop_supported(struct device *dev, u64 mask) -{ - return 1; -} - const struct dma_map_ops dma_noop_ops = { .alloc = dma_noop_alloc, .free = dma_noop_free, .map_page = dma_noop_map_page, .map_sg = dma_noop_map_sg, - .mapping_error = dma_noop_mapping_error, - .dma_supported = dma_noop_supported, }; EXPORT_SYMBOL(dma_noop_ops); diff --git a/lib/dma-virt.c b/lib/dma-virt.c index dcd4df1f7174..5c4f11329721 100644 --- a/lib/dma-virt.c +++ b/lib/dma-virt.c @@ -51,22 +51,10 @@ static int dma_virt_map_sg(struct device *dev, struct scatterlist *sgl, return nents; } -static int dma_virt_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return false; -} - -static int dma_virt_supported(struct device *dev, u64 mask) -{ - return true; -} - const struct dma_map_ops dma_virt_ops = { .alloc = dma_virt_alloc, .free = dma_virt_free, .map_page = dma_virt_map_page, .map_sg = dma_virt_map_sg, - .mapping_error = dma_virt_mapping_error, - .dma_supported = dma_virt_supported, }; EXPORT_SYMBOL(dma_virt_ops); |