[PATCH V4 1/3] arm: dma mapping: Export a dma ops function arm_dma_set_mask
From: Gregory CLEMENT <hidden>
Date: 2012-11-21 09:40:05
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Expose another DMA operations function: arm_dma_set_mask. This function will be added to a custom DMA ops for Armada 370/XP. Depending of its configuration Armada 370/XP can be set as a "nearly" coherent architecture. In this case the DMA ops is made of: - specific functions for this architecture - already exposed arm DMA related functions - the arm_dma_set_mask which was not exposed yet. Signed-off-by: Gregory CLEMENT <redacted> --- arch/arm/include/asm/dma-mapping.h | 2 ++ arch/arm/mm/dma-mapping.c | 4 +--- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 2300484..98d4dab 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h@@ -111,6 +111,8 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size, extern int dma_supported(struct device *dev, u64 mask); +extern int arm_dma_set_mask(struct device *dev, u64 dma_mask); + /** * arm_dma_alloc - allocate consistent memory for DMA * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 58bc3e4..5383bc0 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c@@ -124,8 +124,6 @@ static void arm_dma_sync_single_for_device(struct device *dev, __dma_page_cpu_to_dev(page, offset, size, dir); } -static int arm_dma_set_mask(struct device *dev, u64 dma_mask); - struct dma_map_ops arm_dma_ops = { .alloc = arm_dma_alloc, .free = arm_dma_free,
@@ -971,7 +969,7 @@ int dma_supported(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_supported); -static int arm_dma_set_mask(struct device *dev, u64 dma_mask) +int arm_dma_set_mask(struct device *dev, u64 dma_mask) { if (!dev->dma_mask || !dma_supported(dev, dma_mask)) return -EIO;
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1.7.9.5