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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 21:54:48 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 21:54:48 +0300
commitb7a7d1c1ec688104fdc922568c26395a756f616d (patch)
tree8059a401de91431615737b088f3da20d4567683e /drivers/media/common
parent065b6c4c913d3986c2118acb7e7fb364ce4fb625 (diff)
parent9eb9e96e97b3381e94cba81d93f4a390c26ca6cb (diff)
downloadlinux-b7a7d1c1ec688104fdc922568c26395a756f616d.tar.xz
Merge tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping
Pull DMA mapping updates from Christoph Hellwig: - add debugfs support for dumping dma-debug information (Corentin Labbe) - Kconfig cleanups (Andy Shevchenko and me) - debugfs cleanups (Greg Kroah-Hartman) - improve dma_map_resource and use it in the media code - arch_setup_dma_ops / arch_teardown_dma_ops cleanups - various small cleanups and improvements for the per-device coherent allocator - make the DMA mask an upper bound and don't fail "too large" dma mask in the remaning two architectures - this will allow big driver cleanups in the following merge windows * tag 'dma-mapping-5.1' of git://git.infradead.org/users/hch/dma-mapping: (21 commits) Documentation/DMA-API-HOWTO: update dma_mask sections sparc64/pci_sun4v: allow large DMA masks sparc64/iommu: allow large DMA masks sparc64: refactor the ali DMA quirk ccio: allow large DMA masks dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag dma-mapping: remove dma_mark_declared_memory_occupied dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig dma-mapping: improve selection of dma_declare_coherent availability dma-mapping: remove an incorrect __iommem annotation of: select OF_RESERVED_MEM automatically device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT mfd/sm501: depend on HAS_DMA dma-mapping: add a kconfig symbol for arch_teardown_dma_ops availability dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability dma-mapping: move debug configuration options to kernel/dma dma-debug: add dumping facility via debugfs dma: debug: no need to check return value of debugfs_create functions videobuf2: replace a layering violation with dma_map_resource dma-mapping: don't BUG when calling dma_map_resource on RAM ...
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/videobuf2/videobuf2-dma-contig.c41
1 files changed, 9 insertions, 32 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index aff0ab7bf83d..82389aead6ed 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -439,42 +439,14 @@ static void vb2_dc_put_userptr(void *buf_priv)
set_page_dirty_lock(pages[i]);
sg_free_table(sgt);
kfree(sgt);
+ } else {
+ dma_unmap_resource(buf->dev, buf->dma_addr, buf->size,
+ buf->dma_dir, 0);
}
vb2_destroy_framevec(buf->vec);
kfree(buf);
}
-/*
- * For some kind of reserved memory there might be no struct page available,
- * so all that can be done to support such 'pages' is to try to convert
- * pfn to dma address or at the last resort just assume that
- * dma address == physical address (like it has been assumed in earlier version
- * of videobuf2-dma-contig
- */
-
-#ifdef __arch_pfn_to_dma
-static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- return (dma_addr_t)__arch_pfn_to_dma(dev, pfn);
-}
-#elif defined(__pfn_to_bus)
-static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- return (dma_addr_t)__pfn_to_bus(pfn);
-}
-#elif defined(__pfn_to_phys)
-static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- return (dma_addr_t)__pfn_to_phys(pfn);
-}
-#else
-static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- /* really, we cannot do anything better at this point */
- return (dma_addr_t)(pfn) << PAGE_SHIFT;
-}
-#endif
-
static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr,
unsigned long size, enum dma_data_direction dma_dir)
{
@@ -528,7 +500,12 @@ static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr,
for (i = 1; i < n_pages; i++)
if (nums[i-1] + 1 != nums[i])
goto fail_pfnvec;
- buf->dma_addr = vb2_dc_pfn_to_dma(buf->dev, nums[0]);
+ buf->dma_addr = dma_map_resource(buf->dev,
+ __pfn_to_phys(nums[0]), size, buf->dma_dir, 0);
+ if (dma_mapping_error(buf->dev, buf->dma_addr)) {
+ ret = -ENOMEM;
+ goto fail_pfnvec;
+ }
goto out;
}