From: Rob Clark robdclark@chromium.org
Signed-off-by: Rob Clark robdclark@chromium.org --- arch/arm/Kconfig | 2 ++ arch/arm/mm/dma-mapping-nommu.c | 14 ++++++++++++++ arch/arm/mm/dma-mapping.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 33b00579beff..a48a7263a2c1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -18,6 +18,8 @@ config ARM select ARCH_HAS_SET_MEMORY select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL select ARCH_HAS_STRICT_MODULE_RWX if MMU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_TEARDOWN_DMA_OPS if MMU select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_CUSTOM_GPIO_H diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c index 52b82559d99b..4a3df952151f 100644 --- a/arch/arm/mm/dma-mapping-nommu.c +++ b/arch/arm/mm/dma-mapping-nommu.c @@ -84,6 +84,13 @@ static void __dma_page_cpu_to_dev(phys_addr_t paddr, size_t size, outer_clean_range(paddr, paddr + size); }
+void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + __dma_page_cpu_to_dev(paddr, size, dir); +} +EXPORT_SYMBOL_GPL(arch_sync_dma_for_device); + static void __dma_page_dev_to_cpu(phys_addr_t paddr, size_t size, enum dma_data_direction dir) { @@ -93,6 +100,13 @@ static void __dma_page_dev_to_cpu(phys_addr_t paddr, size_t size, } }
+void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + __dma_page_dev_to_cpu(paddr, size, dir); +} +EXPORT_SYMBOL_GPL(arch_sync_dma_for_cpu); + static dma_addr_t arm_nommu_dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 6774b03aa405..8ead93196194 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -979,6 +979,13 @@ static void __dma_page_cpu_to_dev(struct page *page, unsigned long off, /* FIXME: non-speculating: flush on bidirectional mappings? */ }
+void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + __dma_page_cpu_to_dev(phys_to_page(paddr), paddr % PAGE_SIZE, size, dir); +} +EXPORT_SYMBOL_GPL(arch_sync_dma_for_device); + static void __dma_page_dev_to_cpu(struct page *page, unsigned long off, size_t size, enum dma_data_direction dir) { @@ -1013,6 +1020,27 @@ static void __dma_page_dev_to_cpu(struct page *page, unsigned long off, } }
+void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + __dma_page_dev_to_cpu(phys_to_page(paddr), paddr % PAGE_SIZE, size, dir); +} +EXPORT_SYMBOL_GPL(arch_sync_dma_for_cpu); + +/* + * arch_dma_{alloc,free} fail-stubs needed to avoid link-errors in dma/direct.c + * (which is not actually used on arch/arm) + */ +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flags, unsigned long attrs) +{ + return NULL; +} +void arch_dma_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, unsigned long attrs) +{ +} + /** * arm_dma_map_sg - map a set of SG buffers for streaming mode DMA * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices