diff options
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 22 | ||||
| -rw-r--r-- | arch/arm/mm/mm.h | 3 | ||||
| -rw-r--r-- | include/linux/vmalloc.h | 2 | ||||
| -rw-r--r-- | mm/vmalloc.c | 5 |
4 files changed, 13 insertions, 19 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index eb903beef2ff..aec31f9b918b 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -343,19 +343,13 @@ static void * __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot, const void *caller) { - /* - * DMA allocation can be mapped to user space, so lets - * set VM_USERMAP flags too. - */ - return dma_common_contiguous_remap(page, size, - VM_ARM_DMA_CONSISTENT | VM_USERMAP, + return dma_common_contiguous_remap(page, size, VM_DMA_COHERENT, prot, caller); } static void __dma_free_remap(void *cpu_addr, size_t size) { - dma_common_free_remap(cpu_addr, size, - VM_ARM_DMA_CONSISTENT | VM_USERMAP); + dma_common_free_remap(cpu_addr, size, VM_DMA_COHERENT); } #define DEFAULT_DMA_COHERENT_POOL_SIZE SZ_256K @@ -1371,8 +1365,8 @@ static void * __iommu_alloc_remap(struct page **pages, size_t size, gfp_t gfp, pgprot_t prot, const void *caller) { - return dma_common_pages_remap(pages, size, - VM_ARM_DMA_CONSISTENT | VM_USERMAP, prot, caller); + return dma_common_pages_remap(pages, size, VM_DMA_COHERENT, prot, + caller); } /* @@ -1456,7 +1450,7 @@ static struct page **__iommu_get_pages(void *cpu_addr, unsigned long attrs) return cpu_addr; area = find_vm_area(cpu_addr); - if (area && (area->flags & VM_ARM_DMA_CONSISTENT)) + if (area && (area->flags & VM_DMA_COHERENT)) return area->pages; return NULL; } @@ -1614,10 +1608,8 @@ void __arm_iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr, return; } - if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) == 0) { - dma_common_free_remap(cpu_addr, size, - VM_ARM_DMA_CONSISTENT | VM_USERMAP); - } + if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) == 0) + dma_common_free_remap(cpu_addr, size, VM_DMA_COHERENT); __iommu_remove_mapping(dev, handle, size); __iommu_free_buffer(dev, pages, size, attrs); diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 941356d95a67..88c121ac14b3 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -70,9 +70,6 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page #define VM_ARM_MTYPE(mt) ((mt) << 20) #define VM_ARM_MTYPE_MASK (0x1f << 20) -/* consistent regions used by dma_alloc_attrs() */ -#define VM_ARM_DMA_CONSISTENT 0x20000000 - struct static_vm { struct vm_struct vm; diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 9b21d0047710..dfa718ffdd4f 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -18,6 +18,7 @@ struct notifier_block; /* in notifier.h */ #define VM_ALLOC 0x00000002 /* vmalloc() */ #define VM_MAP 0x00000004 /* vmap()ed pages */ #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ +#define VM_DMA_COHERENT 0x00000010 /* dma_alloc_coherent */ #define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */ #define VM_NO_GUARD 0x00000040 /* don't add guard page */ #define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */ @@ -26,6 +27,7 @@ struct notifier_block; /* in notifier.h */ * vfree_atomic(). */ #define VM_FLUSH_RESET_PERMS 0x00000100 /* Reset direct map and flush TLB on unmap */ + /* bits [20..32] reserved for arch specific ioremap internals */ /* diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 7ba11e12a11f..c1246d77cf75 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2993,7 +2993,7 @@ int remap_vmalloc_range_partial(struct vm_area_struct *vma, unsigned long uaddr, if (!area) return -EINVAL; - if (!(area->flags & VM_USERMAP)) + if (!(area->flags & (VM_USERMAP | VM_DMA_COHERENT))) return -EINVAL; if (kaddr + size > area->addr + get_vm_area_size(area)) @@ -3496,6 +3496,9 @@ static int s_show(struct seq_file *m, void *p) if (v->flags & VM_USERMAP) seq_puts(m, " user"); + if (v->flags & VM_DMA_COHERENT) + seq_puts(m, " dma-coherent"); + if (is_vmalloc_addr(v->pages)) seq_puts(m, " vpages"); |