diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/cache-v7.S | 6 | ||||
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 41 |
2 files changed, 37 insertions, 10 deletions
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index cd956647c21..7539ec27506 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S @@ -44,8 +44,10 @@ ENDPROC(v7_flush_icache_all) ENTRY(v7_flush_dcache_louis) dmb @ ensure ordering with previous memory accesses mrc p15, 1, r0, c0, c0, 1 @ read clidr, r0 = clidr - ands r3, r0, #0xe00000 @ extract LoUIS from clidr - mov r3, r3, lsr #20 @ r3 = LoUIS * 2 + ALT_SMP(ands r3, r0, #(7 << 21)) @ extract LoUIS from clidr + ALT_UP(ands r3, r0, #(7 << 27)) @ extract LoUU from clidr + ALT_SMP(mov r3, r3, lsr #20) @ r3 = LoUIS * 2 + ALT_UP(mov r3, r3, lsr #26) @ r3 = LoUU * 2 moveq pc, lr @ return if level == 0 mov r10, #0 @ r10 (starting level) = 0 b flush_levels @ start flushing cache levels diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 5383bc01857..6b2fb87c869 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1034,7 +1034,8 @@ static inline void __free_iova(struct dma_iommu_mapping *mapping, spin_unlock_irqrestore(&mapping->lock, flags); } -static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t gfp) +static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, + gfp_t gfp, struct dma_attrs *attrs) { struct page **pages; int count = size >> PAGE_SHIFT; @@ -1048,6 +1049,23 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t if (!pages) return NULL; + if (dma_get_attr(DMA_ATTR_FORCE_CONTIGUOUS, attrs)) + { + unsigned long order = get_order(size); + struct page *page; + + page = dma_alloc_from_contiguous(dev, count, order); + if (!page) + goto error; + + __dma_clear_buffer(page, size); + + for (i = 0; i < count; i++) + pages[i] = page + i; + + return pages; + } + while (count) { int j, order = __fls(count); @@ -1081,14 +1099,21 @@ error: return NULL; } -static int __iommu_free_buffer(struct device *dev, struct page **pages, size_t size) +static int __iommu_free_buffer(struct device *dev, struct page **pages, + size_t size, struct dma_attrs *attrs) { int count = size >> PAGE_SHIFT; int array_size = count * sizeof(struct page *); int i; - for (i = 0; i < count; i++) - if (pages[i]) - __free_pages(pages[i], 0); + + if (dma_get_attr(DMA_ATTR_FORCE_CONTIGUOUS, attrs)) { + dma_release_from_contiguous(dev, pages[0], count); + } else { + for (i = 0; i < count; i++) + if (pages[i]) + __free_pages(pages[i], 0); + } + if (array_size <= PAGE_SIZE) kfree(pages); else @@ -1250,7 +1275,7 @@ static void *arm_iommu_alloc_attrs(struct device *dev, size_t size, if (gfp & GFP_ATOMIC) return __iommu_alloc_atomic(dev, size, handle); - pages = __iommu_alloc_buffer(dev, size, gfp); + pages = __iommu_alloc_buffer(dev, size, gfp, attrs); if (!pages) return NULL; @@ -1271,7 +1296,7 @@ static void *arm_iommu_alloc_attrs(struct device *dev, size_t size, err_mapping: __iommu_remove_mapping(dev, *handle, size); err_buffer: - __iommu_free_buffer(dev, pages, size); + __iommu_free_buffer(dev, pages, size, attrs); return NULL; } @@ -1327,7 +1352,7 @@ void arm_iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr, } __iommu_remove_mapping(dev, handle, size); - __iommu_free_buffer(dev, pages, size); + __iommu_free_buffer(dev, pages, size, attrs); } static int arm_iommu_get_sgtable(struct device *dev, struct sg_table *sgt, |