Currently the generic dma remap allocator gets a vm_flags passed by the caller that is a little confusing. We just introduced a generic vmalloc-level flag to identify the dma coherent allocations, so use that everywhere and remove the now pointless argument.
Signed-off-by: Christoph Hellwig <[email protected]> --- arch/arm/mm/dma-mapping.c | 37 +++++++----------------------------- arch/xtensa/kernel/pci-dma.c | 4 ++-- drivers/iommu/dma-iommu.c | 6 +++--- include/linux/dma-mapping.h | 6 ++---- kernel/dma/remap.c | 25 +++++++++++------------- 5 files changed, 25 insertions(+), 53 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index e197b028e341..647fd25d2aba 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -356,19 +356,6 @@ static void *__alloc_remap_buffer(struct device *dev, size_t size, gfp_t gfp, pgprot_t prot, struct page **ret_page, const void *caller, bool want_vaddr); -static void * -__dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot, - const void *caller) -{ - 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_DMA_COHERENT); -} - #define DEFAULT_DMA_COHERENT_POOL_SIZE SZ_256K static struct gen_pool *atomic_pool __ro_after_init; @@ -525,7 +512,7 @@ static void *__alloc_remap_buffer(struct device *dev, size_t size, gfp_t gfp, if (!want_vaddr) goto out; - ptr = __dma_alloc_remap(page, size, gfp, prot, caller); + ptr = dma_common_contiguous_remap(page, size, gfp, prot, caller); if (!ptr) { __dma_free_buffer(page, size); return NULL; @@ -592,7 +579,8 @@ static void *__alloc_from_contiguous(struct device *dev, size_t size, goto out; if (PageHighMem(page)) { - ptr = __dma_alloc_remap(page, size, GFP_KERNEL, prot, caller); + ptr = dma_common_contiguous_remap(page, size, GFP_KERNEL, prot, + caller); if (!ptr) { dma_release_from_contiguous(dev, page, count); return NULL; @@ -612,7 +600,7 @@ static void __free_from_contiguous(struct device *dev, struct page *page, { if (want_vaddr) { if (PageHighMem(page)) - __dma_free_remap(cpu_addr, size); + dma_common_free_remap(cpu_addr, size); else __dma_remap(page, size, PAGE_KERNEL); } @@ -704,7 +692,7 @@ static void *remap_allocator_alloc(struct arm_dma_alloc_args *args, static void remap_allocator_free(struct arm_dma_free_args *args) { if (args->want_vaddr) - __dma_free_remap(args->cpu_addr, args->size); + dma_common_free_remap(args->cpu_addr, args->size); __dma_free_buffer(args->page, args->size); } @@ -1374,17 +1362,6 @@ static int __iommu_free_buffer(struct device *dev, struct page **pages, return 0; } -/* - * Create a CPU mapping for a specified pages - */ -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_DMA_COHERENT, prot, - caller); -} - /* * Create a mapping in device IO address space for specified pages */ @@ -1541,7 +1518,7 @@ static void *__arm_iommu_alloc_attrs(struct device *dev, size_t size, if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) return pages; - addr = __iommu_alloc_remap(pages, size, gfp, prot, + addr = dma_common_pages_remap(pages, size, gfp, prot, __builtin_return_address(0)); if (!addr) goto err_mapping; @@ -1625,7 +1602,7 @@ void __arm_iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr, } if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) == 0) - dma_common_free_remap(cpu_addr, size, VM_DMA_COHERENT); + dma_common_free_remap(cpu_addr, size); __iommu_remove_mapping(dev, handle, size); __iommu_free_buffer(dev, pages, size, attrs); diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c index 9171bff76fc4..81c1def6b5a2 100644 --- a/arch/xtensa/kernel/pci-dma.c +++ b/arch/xtensa/kernel/pci-dma.c @@ -175,7 +175,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (PageHighMem(page)) { void *p; - p = dma_common_contiguous_remap(page, size, VM_MAP, + p = dma_common_contiguous_remap(page, size, pgprot_noncached(PAGE_KERNEL), __builtin_return_address(0)); if (!p) { @@ -202,7 +202,7 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr, page = virt_to_page(platform_vaddr_to_cached(vaddr)); } else { #ifdef CONFIG_MMU - dma_common_free_remap(vaddr, size, VM_MAP); + dma_common_free_remap(vaddr, size); #endif page = pfn_to_page(PHYS_PFN(dma_to_phys(dev, dma_handle))); } diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 0dee374fc64a..cea561897086 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -619,7 +619,7 @@ static void *iommu_dma_alloc_remap(struct device *dev, size_t size, < size) goto out_free_sg; - vaddr = dma_common_pages_remap(pages, size, VM_USERMAP, prot, + vaddr = dma_common_pages_remap(pages, size, prot, __builtin_return_address(0)); if (!vaddr) goto out_unmap; @@ -943,7 +943,7 @@ static void __iommu_dma_free(struct device *dev, size_t size, void *cpu_addr) pages = __iommu_dma_get_pages(cpu_addr); if (!pages) page = vmalloc_to_page(cpu_addr); - dma_common_free_remap(cpu_addr, alloc_size, VM_USERMAP); + dma_common_free_remap(cpu_addr, alloc_size); } else { /* Lowmem means a coherent atomic or CMA allocation */ page = virt_to_page(cpu_addr); @@ -983,7 +983,7 @@ static void *iommu_dma_alloc_pages(struct device *dev, size_t size, pgprot_t prot = arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs); cpu_addr = dma_common_contiguous_remap(page, alloc_size, - VM_USERMAP, prot, __builtin_return_address(0)); + prot, __builtin_return_address(0)); if (!cpu_addr) goto out_free_pages; diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 6309a721394b..ac320b7cacfd 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -616,13 +616,11 @@ extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, unsigned long attrs); void *dma_common_contiguous_remap(struct page *page, size_t size, - unsigned long vm_flags, pgprot_t prot, const void *caller); void *dma_common_pages_remap(struct page **pages, size_t size, - unsigned long vm_flags, pgprot_t prot, - const void *caller); -void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags); + pgprot_t prot, const void *caller); +void dma_common_free_remap(void *cpu_addr, size_t size); int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot); bool dma_in_atomic_pool(void *start, size_t size); diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index 7a723194ecbe..51958d21c810 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -12,12 +12,11 @@ #include <linux/vmalloc.h> static struct vm_struct *__dma_common_pages_remap(struct page **pages, - size_t size, unsigned long vm_flags, pgprot_t prot, - const void *caller) + size_t size, pgprot_t prot, const void *caller) { struct vm_struct *area; - area = get_vm_area_caller(size, vm_flags, caller); + area = get_vm_area_caller(size, VM_DMA_COHERENT, caller); if (!area) return NULL; @@ -34,12 +33,11 @@ static struct vm_struct *__dma_common_pages_remap(struct page **pages, * Cannot be used in non-sleeping contexts */ void *dma_common_pages_remap(struct page **pages, size_t size, - unsigned long vm_flags, pgprot_t prot, - const void *caller) + pgprot_t prot, const void *caller) { struct vm_struct *area; - area = __dma_common_pages_remap(pages, size, vm_flags, prot, caller); + area = __dma_common_pages_remap(pages, size, prot, caller); if (!area) return NULL; @@ -53,7 +51,6 @@ void *dma_common_pages_remap(struct page **pages, size_t size, * Cannot be used in non-sleeping contexts */ void *dma_common_contiguous_remap(struct page *page, size_t size, - unsigned long vm_flags, pgprot_t prot, const void *caller) { int i; @@ -67,7 +64,7 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, for (i = 0; i < (size >> PAGE_SHIFT); i++) pages[i] = nth_page(page, i); - area = __dma_common_pages_remap(pages, size, vm_flags, prot, caller); + area = __dma_common_pages_remap(pages, size, prot, caller); kfree(pages); @@ -79,11 +76,11 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, /* * Unmaps a range previously mapped by dma_common_*_remap */ -void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags) +void dma_common_free_remap(void *cpu_addr, size_t size) { struct vm_struct *area = find_vm_area(cpu_addr); - if (!area || (area->flags & vm_flags) != vm_flags) { + if (!area || area->flags != VM_DMA_COHERENT) { WARN(1, "trying to free invalid coherent area: %p\n", cpu_addr); return; } @@ -127,8 +124,8 @@ int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot) if (!atomic_pool) goto free_page; - addr = dma_common_contiguous_remap(page, atomic_pool_size, VM_USERMAP, - prot, __builtin_return_address(0)); + addr = dma_common_contiguous_remap(page, atomic_pool_size, prot, + __builtin_return_address(0)); if (!addr) goto destroy_genpool; @@ -143,7 +140,7 @@ int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot) return 0; remove_mapping: - dma_common_free_remap(addr, atomic_pool_size, VM_USERMAP); + dma_common_free_remap(addr, atomic_pool_size); destroy_genpool: gen_pool_destroy(atomic_pool); atomic_pool = NULL; @@ -220,7 +217,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, } /* create a coherent mapping */ - ret = dma_common_contiguous_remap(page, size, VM_USERMAP, + ret = dma_common_contiguous_remap(page, size, arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs), __builtin_return_address(0)); if (!ret) { -- 2.20.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
