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| author | Vinod Koul <vinod.koul@intel.com> | 2016-10-03 06:48:06 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-10-03 06:48:06 +0300 |
| commit | ed58a112b0f57f2673cd483d45d82de1ad890e9a (patch) | |
| tree | 36e92dd23787c646bd5c8a40b9d9e7e39dbd476e /include/linux | |
| parent | f492908067d0dc4066706217938344b5e7fd0016 (diff) | |
| parent | 2e0cc304e984290935c70fdbe589931e552d7d94 (diff) | |
| download | linux-ed58a112b0f57f2673cd483d45d82de1ad890e9a.tar.xz | |
Merge branch 'topic/iommu' into for-linus
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dma-debug.h | 19 | ||||
| -rw-r--r-- | include/linux/dma-mapping.h | 41 |
2 files changed, 60 insertions, 0 deletions
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index fe8cb610deac..c7d844f09c3a 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -56,6 +56,13 @@ extern void debug_dma_alloc_coherent(struct device *dev, size_t size, extern void debug_dma_free_coherent(struct device *dev, size_t size, void *virt, dma_addr_t addr); +extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr, + size_t size, int direction, + dma_addr_t dma_addr); + +extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr, + size_t size, int direction); + extern void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, int direction); @@ -141,6 +148,18 @@ static inline void debug_dma_free_coherent(struct device *dev, size_t size, { } +static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr, + size_t size, int direction, + dma_addr_t dma_addr) +{ +} + +static inline void debug_dma_unmap_resource(struct device *dev, + dma_addr_t dma_addr, size_t size, + int direction) +{ +} + static inline void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, int direction) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 66533e18276c..642cb4c7ad37 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -95,6 +95,12 @@ struct dma_map_ops { struct scatterlist *sg, int nents, enum dma_data_direction dir, unsigned long attrs); + dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr, + size_t size, enum dma_data_direction dir, + unsigned long attrs); + void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction dir, + unsigned long attrs); void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir); @@ -258,6 +264,41 @@ static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, debug_dma_unmap_page(dev, addr, size, dir, false); } +static inline dma_addr_t dma_map_resource(struct device *dev, + phys_addr_t phys_addr, + size_t size, + enum dma_data_direction dir, + unsigned long attrs) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + dma_addr_t addr; + + BUG_ON(!valid_dma_direction(dir)); + + /* Don't allow RAM to be mapped */ + BUG_ON(pfn_valid(PHYS_PFN(phys_addr))); + + addr = phys_addr; + if (ops->map_resource) + addr = ops->map_resource(dev, phys_addr, size, dir, attrs); + + debug_dma_map_resource(dev, phys_addr, size, dir, addr); + + return addr; +} + +static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, + unsigned long attrs) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (ops->unmap_resource) + ops->unmap_resource(dev, addr, size, dir, attrs); + debug_dma_unmap_resource(dev, addr, size, dir); +} + static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir) |