This replaces usages of address_needs_mapping, range_needs_mapping and is_buffer_dma_capable and the __weak architecture hooks to those functions with a more flexible single function. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx> Cc: Olaf Kirch <okir@xxxxxxx> Cc: Greg KH <gregkh@xxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Becky Bruce <beckyb@xxxxxxxxxxxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx> Cc: x86@xxxxxxxxxx Cc: linux-ia64@xxxxxxxxxxxxxxx Cc: linuxppc-dev@xxxxxxxxxx --- arch/x86/kernel/pci-swiotlb.c | 5 --- include/linux/dma-mapping.h | 5 --- include/linux/swiotlb.h | 2 - lib/swiotlb.c | 59 +++++++++++++--------------------------- 4 files changed, 19 insertions(+), 52 deletions(-) diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c index e89cf99..fdcc0e2 100644 --- a/arch/x86/kernel/pci-swiotlb.c +++ b/arch/x86/kernel/pci-swiotlb.c @@ -23,11 +23,6 @@ void *swiotlb_alloc(unsigned order, unsigned long nslabs) return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order); } -int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size) -{ - return 0; -} - static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags) { diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 8083b6a..85dafa1 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -96,11 +96,6 @@ static inline int is_device_dma_capable(struct device *dev) return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; } -static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size) -{ - return addr + size <= mask; -} - #ifdef CONFIG_HAS_DMA #include <asm/dma-mapping.h> #else diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 954feec..1b56dbf 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -27,8 +27,6 @@ swiotlb_init(void); extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs); extern void *swiotlb_alloc(unsigned order, unsigned long nslabs); -extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size); - extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags); diff --git a/lib/swiotlb.c b/lib/swiotlb.c index baa1991..d37499b 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -135,17 +135,6 @@ void * __weak swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address) return phys_to_virt(dma_to_phys(hwdev, address)); } -int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev, - dma_addr_t addr, size_t size) -{ - return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); -} - -int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size) -{ - return 0; -} - static void swiotlb_print_info(unsigned long bytes) { phys_addr_t pstart, pend; @@ -305,17 +294,6 @@ cleanup1: return -ENOMEM; } -static inline int -address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size) -{ - return swiotlb_arch_address_needs_mapping(hwdev, addr, size); -} - -static inline int range_needs_mapping(phys_addr_t paddr, size_t size) -{ - return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size); -} - static int is_swiotlb_buffer(char *addr) { return addr >= io_tlb_start && addr < io_tlb_end; @@ -542,7 +520,7 @@ void * swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags) { - dma_addr_t dev_addr; + phys_addr_t phys; void *ret; int order = get_order(size); u64 dma_mask = DMA_BIT_MASK(32); @@ -551,9 +529,8 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_mask = hwdev->coherent_dma_mask; ret = (void *)__get_free_pages(flags, order); - if (ret && - !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(hwdev, ret), - size)) { + if (ret && !dma_map_range(hwdev, dma_mask, virt_to_phys(ret), + size, dma_handle)) { /* * The allocated memory isn't reachable by the device. */ @@ -572,19 +549,19 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, } memset(ret, 0, size); - dev_addr = swiotlb_virt_to_bus(hwdev, ret); + phys = virt_to_phys(ret); /* Confirm address can be DMA'd by device */ - if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) { - printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n", + if (!dma_map_range(hwdev, dma_mask, phys, size, dma_handle)) { + printk(KERN_WARNING "hwdev DMA mask = 0x%016Lx, " + "physical addr = 0x%016Lx\n", (unsigned long long)dma_mask, - (unsigned long long)dev_addr); + (unsigned long long)phys); /* DMA_TO_DEVICE to avoid memcpy in unmap_single */ do_unmap_single(hwdev, ret, size, DMA_TO_DEVICE); return NULL; } - *dma_handle = dev_addr; return ret; } EXPORT_SYMBOL(swiotlb_alloc_coherent); @@ -636,7 +613,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, struct dma_attrs *attrs) { phys_addr_t phys = page_to_phys(page) + offset; - dma_addr_t dev_addr = phys_to_dma(dev, phys); + dma_addr_t dev_addr; void *map; BUG_ON(dir == DMA_NONE); @@ -645,8 +622,8 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, * we can safely return the device addr and not worry about bounce * buffering it. */ - if (!address_needs_mapping(dev, dev_addr, size) && - !range_needs_mapping(phys, size)) + if (dma_map_range(dev, dma_get_mask(dev), phys, size, &dev_addr) && + !swiotlb_force) return dev_addr; /* @@ -658,12 +635,12 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, map = io_tlb_overflow_buffer; } - dev_addr = swiotlb_virt_to_bus(dev, map); + phys = virt_to_phys(map); /* * Ensure that the address returned is DMA'ble */ - if (address_needs_mapping(dev, dev_addr, size)) + if (!dma_map_range(dev, dma_get_mask(dev), phys, size, &dev_addr)) panic("map_single: bounce buffer is not DMA'ble"); return dev_addr; @@ -807,10 +784,11 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, for_each_sg(sgl, sg, nelems, i) { phys_addr_t paddr = sg_phys(sg); - dma_addr_t dev_addr = phys_to_dma(hwdev, paddr); + dma_addr_t uninitialized_var(dev_addr); - if (range_needs_mapping(paddr, sg->length) || - address_needs_mapping(hwdev, dev_addr, sg->length)) { + if (!dma_map_range(hwdev, dma_get_mask(hwdev), dev_addr, + sg->length, &dev_addr) || + swiotlb_force) { void *map = map_single(hwdev, sg_phys(sg), sg->length, dir); if (!map) { @@ -822,7 +800,8 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, sgl[0].dma_length = 0; return 0; } - sg->dma_address = swiotlb_virt_to_bus(hwdev, map); + paddr = virt_to_phys(map); + sg->dma_address = phys_to_dma(hwdev, paddr); } else sg->dma_address = dev_addr; sg->dma_length = sg->length; -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
![]() |