diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/dma-mapping.h | 5 | ||||
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/amd_gart_64.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-calgary_64.c | 25 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-nommu.c | 11 | ||||
| -rw-r--r-- | arch/x86/pci/sta2x11-fixup.c | 3 | ||||
| -rw-r--r-- | arch/x86/xen/pci-swiotlb-xen.c | 14 |
8 files changed, 33 insertions, 36 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 08a0838..398c798 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -19,8 +19,6 @@ # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32) #endif -#define DMA_ERROR_CODE 0 - extern int iommu_merge; extern struct device x86_dma_fallback_dev; extern int panic_on_overflow; @@ -35,9 +33,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp); #define arch_dma_alloc_attrs arch_dma_alloc_attrs -#define HAVE_ARCH_DMA_SUPPORTED 1 -extern int dma_supported(struct device *hwdev, u64 mask); - extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, gfp_t flag, unsigned long attrs); diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index 7938698..fca144a 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -6,6 +6,8 @@ extern int force_iommu, no_iommu; extern int iommu_detected; extern int iommu_pass_through; +int x86_dma_supported(struct device *dev, u64 mask); + /* 10 seconds */ #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c index 815dd63..cc0e8bc 100644 --- a/arch/x86/kernel/amd_gart_64.c +++ b/arch/x86/kernel/amd_gart_64.c @@ -704,6 +704,7 @@ static const struct dma_map_ops gart_dma_ops = { .alloc = gart_alloc_coherent, .free = gart_free_coherent, .mapping_error = gart_mapping_error, + .dma_supported = x86_dma_supported, }; static void gart_iommu_shutdown(void) diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c index fda7867..5286a4a 100644 --- a/arch/x86/kernel/pci-calgary_64.c +++ b/arch/x86/kernel/pci-calgary_64.c @@ -50,6 +50,8 @@ #include <asm/x86_init.h> #include <asm/iommu_table.h> +#define CALGARY_MAPPING_ERROR 0 + #ifdef CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT int use_calgary __read_mostly = 1; #else @@ -252,7 +254,7 @@ static unsigned long iommu_range_alloc(struct device *dev, if (panic_on_overflow) panic("Calgary: fix the allocator.\n"); else - return DMA_ERROR_CODE; + return CALGARY_MAPPING_ERROR; } } @@ -272,10 +274,10 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl, entry = iommu_range_alloc(dev, tbl, npages); - if (unlikely(entry == DMA_ERROR_CODE)) { + if (unlikely(entry == CALGARY_MAPPING_ERROR)) { pr_warn("failed to allocate %u pages in iommu %p\n", npages, tbl); - return DMA_ERROR_CODE; + return CALGARY_MAPPING_ERROR; } /* set the return dma address */ @@ -295,7 +297,7 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, unsigned long flags; /* were we called with bad_dma_address? */ - badend = DMA_ERROR_CODE + (EMERGENCY_PAGES * PAGE_SIZE); + badend = CALGARY_MAPPING_ERROR + (EMERGENCY_PAGES * PAGE_SIZE); if (unlikely(dma_addr < badend)) { WARN(1, KERN_ERR "Calgary: driver tried unmapping bad DMA " "address 0x%Lx\n", dma_addr); @@ -380,7 +382,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg, npages = iommu_num_pages(vaddr, s->length, PAGE_SIZE); entry = iommu_range_alloc(dev, tbl, npages); - if (entry == DMA_ERROR_CODE) { + if (entry == CALGARY_MAPPING_ERROR) { /* makes sure unmap knows to stop */ s->dma_length = 0; goto error; @@ -398,7 +400,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg, error: calgary_unmap_sg(dev, sg, nelems, dir, 0); for_each_sg(sg, s, nelems, i) { - sg->dma_address = DMA_ERROR_CODE; + sg->dma_address = CALGARY_MAPPING_ERROR; sg->dma_length = 0; } return 0; @@ -453,7 +455,7 @@ static void* calgary_alloc_coherent(struct device *dev, size_t size, /* set up tces to cover the allocated range */ mapping = iommu_alloc(dev, tbl, ret, npages, DMA_BIDIRECTIONAL); - if (mapping == DMA_ERROR_CODE) + if (mapping == CALGARY_MAPPING_ERROR) goto free; *dma_handle = mapping; return ret; @@ -478,6 +480,11 @@ static void calgary_free_coherent(struct device *dev, size_t size, free_pages((unsigned long)vaddr, get_order(size)); } +static int calgary_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == CALGARY_MAPPING_ERROR; +} + static const struct dma_map_ops calgary_dma_ops = { .alloc = calgary_alloc_coherent, .free = calgary_free_coherent, @@ -485,6 +492,8 @@ static const struct dma_map_ops calgary_dma_ops = { .unmap_sg = calgary_unmap_sg, .map_page = calgary_map_page, .unmap_page = calgary_unmap_page, + .mapping_error = calgary_mapping_error, + .dma_supported = x86_dma_supported, }; static inline void __iomem * busno_to_bbar(unsigned char num) @@ -732,7 +741,7 @@ static void __init calgary_reserve_regions(struct pci_dev *dev) struct iommu_table *tbl = pci_iommu(dev->bus); /* reserve EMERGENCY_PAGES from bad_dma_address and up */ - iommu_range_reserve(tbl, DMA_ERROR_CODE, EMERGENCY_PAGES); + iommu_range_reserve(tbl, CALGARY_MAPPING_ERROR, EMERGENCY_PAGES); /* avoid the BIOS/VGA first 640KB-1MB region */ /* for CalIOC2 - avoid the entire first MB */ diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 3a216ec..5e16d3f 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -213,10 +213,8 @@ static __init int iommu_setup(char *p) } early_param("iommu", iommu_setup); -int dma_supported(struct device *dev, u64 mask) +int x86_dma_supported(struct device *dev, u64 mask) { - const struct dma_map_ops *ops = get_dma_ops(dev); - #ifdef CONFIG_PCI if (mask > 0xffffffff && forbid_dac > 0) { dev_info(dev, "PCI: Disallowing DAC for device\n"); @@ -224,9 +222,6 @@ int dma_supported(struct device *dev, u64 mask) } #endif - if (ops->dma_supported) - return ops->dma_supported(dev, mask); - /* Copied from i386. Doesn't make much sense, because it will only work for pci_alloc_coherent. The caller just has to use GFP_DMA in this case. */ @@ -252,7 +247,6 @@ int dma_supported(struct device *dev, u64 mask) return 1; } -EXPORT_SYMBOL(dma_supported); static int __init pci_iommu_init(void) { diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index a88952e..a6d4040 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -11,6 +11,8 @@ #include <asm/iommu.h> #include <asm/dma.h> +#define NOMMU_MAPPING_ERROR 0 + static int check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size) { @@ -33,7 +35,7 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page, dma_addr_t bus = page_to_phys(page) + offset; WARN_ON(size == 0); if (!check_addr("map_single", dev, bus, size)) - return DMA_ERROR_CODE; + return NOMMU_MAPPING_ERROR; flush_write_buffers(); return bus; } @@ -88,6 +90,11 @@ static void nommu_sync_sg_for_device(struct device *dev, flush_write_buffers(); } +static int nommu_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == NOMMU_MAPPING_ERROR; +} + const struct dma_map_ops nommu_dma_ops = { .alloc = dma_generic_alloc_coherent, .free = dma_generic_free_coherent, @@ -96,4 +103,6 @@ const struct dma_map_ops nommu_dma_ops = { .sync_single_for_device = nommu_sync_single_for_device, .sync_sg_for_device = nommu_sync_sg_for_device, .is_phys = 1, + .mapping_error = nommu_mapping_error, + .dma_supported = x86_dma_supported, }; diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c index ec008e8..53d6002 100644 --- a/arch/x86/pci/sta2x11-fixup.c +++ b/arch/x86/pci/sta2x11-fixup.c @@ -26,6 +26,7 @@ #include <linux/pci_ids.h> #include <linux/export.h> #include <linux/list.h> +#include <asm/iommu.h> #define STA2X11_SWIOTLB_SIZE (4*1024*1024) extern int swiotlb_late_init_with_default_size(size_t default_size); @@ -191,7 +192,7 @@ static const struct dma_map_ops sta2x11_dma_ops = { .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, .sync_sg_for_device = swiotlb_sync_sg_for_device, .mapping_error = swiotlb_dma_mapping_error, - .dma_supported = NULL, /* FIXME: we should use this instead! */ + .dma_supported = x86_dma_supported, }; /* At setup time, we use our own ops if the device is a ConneXt one */ diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c index 42b08f8..37c6056 100644 --- a/arch/x86/xen/pci-swiotlb-xen.c +++ b/arch/x86/xen/pci-swiotlb-xen.c @@ -18,20 +18,6 @@ int xen_swiotlb __read_mostly; -static const struct dma_map_ops xen_swiotlb_dma_ops = { - .alloc = xen_swiotlb_alloc_coherent, - .free = xen_swiotlb_free_coherent, - .sync_single_for_cpu = xen_swiotlb_sync_single_for_cpu, - .sync_single_for_device = xen_swiotlb_sync_single_for_device, - .sync_sg_for_cpu = xen_swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = xen_swiotlb_sync_sg_for_device, - .map_sg = xen_swiotlb_map_sg_attrs, - .unmap_sg = xen_swiotlb_unmap_sg_attrs, - .map_page = xen_swiotlb_map_page, - .unmap_page = xen_swiotlb_unmap_page, - .dma_supported = xen_swiotlb_dma_supported, -}; - /* * pci_xen_swiotlb_detect - set xen_swiotlb to 1 if necessary * |
