diff options
Diffstat (limited to 'kernel/dma/mapping.c')
| -rw-r--r-- | kernel/dma/mapping.c | 105 |
1 files changed, 7 insertions, 98 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index d7c34d2d1ba5..ef2aba503467 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -46,45 +46,6 @@ static int dmam_match(struct device *dev, void *res, void *match_data) } /** - * dmam_alloc_coherent - Managed dma_alloc_coherent() - * @dev: Device to allocate coherent memory for - * @size: Size of allocation - * @dma_handle: Out argument for allocated DMA handle - * @gfp: Allocation flags - * - * Managed dma_alloc_coherent(). Memory allocated using this function - * will be automatically released on driver detach. - * - * RETURNS: - * Pointer to allocated memory on success, NULL on failure. - */ -void *dmam_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) -{ - struct dma_devres *dr; - void *vaddr; - - dr = devres_alloc(dmam_release, sizeof(*dr), gfp); - if (!dr) - return NULL; - - vaddr = dma_alloc_coherent(dev, size, dma_handle, gfp); - if (!vaddr) { - devres_free(dr); - return NULL; - } - - dr->vaddr = vaddr; - dr->dma_handle = *dma_handle; - dr->size = size; - - devres_add(dev, dr); - - return vaddr; -} -EXPORT_SYMBOL(dmam_alloc_coherent); - -/** * dmam_free_coherent - Managed dma_free_coherent() * @dev: Device to free coherent memory for * @size: Size of allocation @@ -144,61 +105,6 @@ void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, } EXPORT_SYMBOL(dmam_alloc_attrs); -#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT - -static void dmam_coherent_decl_release(struct device *dev, void *res) -{ - dma_release_declared_memory(dev); -} - -/** - * dmam_declare_coherent_memory - Managed dma_declare_coherent_memory() - * @dev: Device to declare coherent memory for - * @phys_addr: Physical address of coherent memory to be declared - * @device_addr: Device address of coherent memory to be declared - * @size: Size of coherent memory to be declared - * @flags: Flags - * - * Managed dma_declare_coherent_memory(). - * - * RETURNS: - * 0 on success, -errno on failure. - */ -int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, - dma_addr_t device_addr, size_t size, int flags) -{ - void *res; - int rc; - - res = devres_alloc(dmam_coherent_decl_release, 0, GFP_KERNEL); - if (!res) - return -ENOMEM; - - rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size, - flags); - if (!rc) - devres_add(dev, res); - else - devres_free(res); - - return rc; -} -EXPORT_SYMBOL(dmam_declare_coherent_memory); - -/** - * dmam_release_declared_memory - Managed dma_release_declared_memory(). - * @dev: Device to release declared coherent memory for - * - * Managed dmam_release_declared_memory(). - */ -void dmam_release_declared_memory(struct device *dev) -{ - WARN_ON(devres_destroy(dev, dmam_coherent_decl_release, NULL, NULL)); -} -EXPORT_SYMBOL(dmam_release_declared_memory); - -#endif - /* * Create scatter-list for the already allocated DMA buffer. */ @@ -301,7 +207,6 @@ int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, } EXPORT_SYMBOL(dma_mmap_attrs); -#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK static u64 dma_default_get_required_mask(struct device *dev) { u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); @@ -332,7 +237,6 @@ u64 dma_get_required_mask(struct device *dev) return dma_default_get_required_mask(dev); } EXPORT_SYMBOL_GPL(dma_get_required_mask); -#endif #ifndef arch_dma_alloc_attrs #define arch_dma_alloc_attrs(dev) (true) @@ -412,18 +316,23 @@ int dma_supported(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_supported); -#ifndef HAVE_ARCH_DMA_SET_MASK +#ifdef CONFIG_ARCH_HAS_DMA_SET_MASK +void arch_dma_set_mask(struct device *dev, u64 mask); +#else +#define arch_dma_set_mask(dev, mask) do { } while (0) +#endif + int dma_set_mask(struct device *dev, u64 mask) { if (!dev->dma_mask || !dma_supported(dev, mask)) return -EIO; + arch_dma_set_mask(dev, mask); dma_check_mask(dev, mask); *dev->dma_mask = mask; return 0; } EXPORT_SYMBOL(dma_set_mask); -#endif #ifndef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK int dma_set_coherent_mask(struct device *dev, u64 mask) |