diff options
Diffstat (limited to 'arch/microblaze/kernel/dma.c')
| -rw-r--r-- | arch/microblaze/kernel/dma.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c index e45ada8fb006..990bf9ea0ec6 100644 --- a/arch/microblaze/kernel/dma.c +++ b/arch/microblaze/kernel/dma.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2009-2010 PetaLogix * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation @@ -12,6 +13,7 @@ #include <linux/dma-debug.h> #include <linux/export.h> #include <linux/bug.h> +#include <asm/cacheflush.h> #define NOT_COHERENT_CACHE @@ -51,6 +53,22 @@ static void dma_direct_free_coherent(struct device *dev, size_t size, #endif } +static inline void __dma_sync(unsigned long paddr, + size_t size, enum dma_data_direction direction) +{ + switch (direction) { + case DMA_TO_DEVICE: + case DMA_BIDIRECTIONAL: + flush_dcache_range(paddr, paddr + size); + break; + case DMA_FROM_DEVICE: + invalidate_dcache_range(paddr, paddr + size); + break; + default: + BUG(); + } +} + static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction, unsigned long attrs) @@ -165,7 +183,7 @@ int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, unsigned long attrs) { #ifdef CONFIG_MMU - unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; unsigned long off = vma->vm_pgoff; unsigned long pfn; |