diff options
119 files changed, 728 insertions, 1266 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 98ee6fe..7b5ef9a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4343,10 +4343,12 @@ T: git git://git.infradead.org/users/hch/dma-mapping.git W: http://git.infradead.org/users/hch/dma-mapping.git S: Supported F: lib/dma-debug.c -F: lib/dma-noop.c +F: lib/dma-direct.c F: lib/dma-virt.c F: drivers/base/dma-mapping.c F: drivers/base/dma-coherent.c +F: include/asm-generic/dma-mapping.h +F: include/linux/dma-direct.h F: include/linux/dma-mapping.h DME1737 HARDWARE MONITOR DRIVER @@ -13071,7 +13073,7 @@ F: arch/x86/boot/video* SWIOTLB SUBSYSTEM M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> -L: linux-kernel@vger.kernel.org +L: iommu@lists.linux-foundation.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb.git S: Supported F: lib/swiotlb.c @@ -15026,6 +15028,7 @@ F: include/xen/interface/io/vscsiif.h XEN SWIOTLB SUBSYSTEM M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> L: xen-devel@lists.xenproject.org (moderated for non-subscribers) +L: iommu@lists.linux-foundation.org S: Supported F: arch/x86/xen/*swiotlb* F: drivers/xen/*swiotlb* diff --git a/arch/Kconfig b/arch/Kconfig index a26d6f8..1b560e7 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -938,6 +938,10 @@ config STRICT_MODULE_RWX and non-text memory will be made non-executable. This provides protection against certain security exploits (e.g. writing to text) +# select if the architecture provides an asm/dma-direct.h header +config ARCH_HAS_PHYS_TO_DMA + bool + config ARCH_HAS_REFCOUNT bool help diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index b31b974..e96adcb 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -209,6 +209,7 @@ config ALPHA_EIGER config ALPHA_JENSEN bool "Jensen" + depends on BROKEN help DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one of the first-generation Alpha systems. A number of these systems diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 9d5fd00..f3a80cf 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -463,9 +463,6 @@ config ARCH_PHYS_ADDR_T_64BIT config ARCH_DMA_ADDR_T_64BIT bool -config ARC_PLAT_NEEDS_PHYS_TO_DMA - bool - config ARC_KVADDR_SIZE int "Kernel Virtual Address Space size (MB)" range 0 512 diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h index 9428503..7a16824 100644 --- a/arch/arc/include/asm/dma-mapping.h +++ b/arch/arc/include/asm/dma-mapping.h @@ -11,13 +11,6 @@ #ifndef ASM_ARC_DMA_MAPPING_H #define ASM_ARC_DMA_MAPPING_H -#ifndef CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA -#define plat_dma_to_phys(dev, dma_handle) ((phys_addr_t)(dma_handle)) -#define plat_phys_to_dma(dev, paddr) ((dma_addr_t)(paddr)) -#else -#include <plat/dma.h> -#endif - extern const struct dma_map_ops arc_dma_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c index e9d9360..1dcc404 100644 --- a/arch/arc/mm/dma.c +++ b/arch/arc/mm/dma.c @@ -60,7 +60,7 @@ static void *arc_dma_alloc(struct device *dev, size_t size, /* This is linear addr (0x8000_0000 based) */ paddr = page_to_phys(page); - *dma_handle = plat_phys_to_dma(dev, paddr); + *dma_handle = paddr; /* This is kernel Virtual address (0x7000_0000 based) */ if (need_kvaddr) { @@ -92,7 +92,7 @@ static void *arc_dma_alloc(struct device *dev, size_t size, static void arc_dma_free(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { - phys_addr_t paddr = plat_dma_to_phys(dev, dma_handle); + phys_addr_t paddr = dma_handle; struct page *page = virt_to_page(paddr); int is_non_coh = 1; @@ -111,7 +111,7 @@ static int arc_dma_mmap(struct device *dev, struct vm_area_struct *vma, { unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; - unsigned long pfn = __phys_to_pfn(plat_dma_to_phys(dev, dma_addr)); + unsigned long pfn = __phys_to_pfn(dma_addr); unsigned long off = vma->vm_pgoff; int ret = -ENXIO; @@ -175,7 +175,7 @@ static dma_addr_t arc_dma_map_page(struct device *dev, struct page *page, if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) _dma_cache_sync(paddr, size, dir); - return plat_phys_to_dma(dev, paddr); + return paddr; } /* @@ -190,7 +190,7 @@ static void arc_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, unsigned long attrs) { - phys_addr_t paddr = plat_dma_to_phys(dev, handle); + phys_addr_t paddr = handle; if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) _dma_cache_sync(paddr, size, dir); @@ -224,13 +224,13 @@ static void arc_dma_unmap_sg(struct device *dev, struct scatterlist *sg, static void arc_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) { - _dma_cache_sync(plat_dma_to_phys(dev, dma_handle), size, DMA_FROM_DEVICE); + _dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE); } static void arc_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) { - _dma_cache_sync(plat_dma_to_phys(dev, dma_handle), size, DMA_TO_DEVICE); + _dma_cache_sync(dma_handle, size, DMA_TO_DEVICE); } static void arc_dma_sync_sg_for_cpu(struct device *dev, diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 51c8df5..430a0aa 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -8,6 +8,7 @@ config ARM select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_SET_MEMORY + select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL select ARCH_HAS_STRICT_MODULE_RWX if MMU select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST @@ -24,7 +25,7 @@ config ARM select CLONE_BACKWARDS select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS - select DMA_NOOP_OPS if !MMU + select DMA_DIRECT_OPS if !MMU select EDAC_SUPPORT select EDAC_ATOMIC_SCRUB select GENERIC_ALLOCATOR diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h new file mode 100644 index 0000000..5b0a8a4 --- /dev/null +++ b/arch/arm/include/asm/dma-direct.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ASM_ARM_DMA_DIRECT_H +#define ASM_ARM_DMA_DIRECT_H 1 + +static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + unsigned int offset = paddr & ~PAGE_MASK; + return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; +} + +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) +{ + unsigned int offset = dev_addr & ~PAGE_MASK; + return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; +} + +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + u64 limit, mask; + + if (!dev->dma_mask) + return 0; + + mask = *dev->dma_mask; + + limit = (mask + 1) & ~mask; + if (limit && size > limit) + return 0; + + if ((addr | (addr + size - 1)) & ~mask) + return 0; + + return 1; +} + +#endif /* ASM_ARM_DMA_DIRECT_H */ diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index daf8374..8436f6a 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -18,7 +18,7 @@ extern const struct dma_map_ops arm_coherent_dma_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { - return IS_ENABLED(CONFIG_MMU) ? &arm_dma_ops : &dma_noop_ops; + return IS_ENABLED(CONFIG_MMU) ? &arm_dma_ops : &dma_direct_ops; } #ifdef __arch_page_to_dma @@ -109,39 +109,6 @@ static inline bool is_device_dma_coherent(struct device *dev) return dev->archdata.dma_coherent; } -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - unsigned int offset = paddr & ~PAGE_MASK; - return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) -{ - unsigned int offset = dev_addr & ~PAGE_MASK; - return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - u64 limit, mask; - - if (!dev->dma_mask) - return 0; - - mask = *dev->dma_mask; - - limit = (mask + 1) & ~mask; - if (limit && size > limit) - return 0; - - if ((addr | (addr + size - 1)) & ~mask) - return 0; - - return 1; -} - -static inline void dma_mark_clean(void *addr, size_t size) { } - /** * arm_dma_alloc - allocate consistent memory for DMA * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c index 6db5fc2..619f24a 100644 --- a/arch/arm/mm/dma-mapping-nommu.c +++ b/arch/arm/mm/dma-mapping-nommu.c @@ -11,7 +11,7 @@ #include <linux/export.h> #include <linux/mm.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/scatterlist.h> #include <asm/cachetype.h> @@ -22,7 +22,7 @@ #include "dma.h" /* - * dma_noop_ops is used if + * dma_direct_ops is used if * - MMU/MPU is off * - cpu is v7m w/o cache support * - device is coherent @@ -39,7 +39,6 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size, unsigned long attrs) { - const struct dma_map_ops *ops = &dma_noop_ops; void *ret; /* @@ -48,7 +47,7 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size, */ if (attrs & DMA_ATTR_NON_CONSISTENT) - return ops->alloc(dev, size, dma_handle, gfp, attrs); + return dma_direct_alloc(dev, size, dma_handle, gfp, attrs); ret = dma_alloc_from_global_coherent(size, dma_handle); @@ -70,10 +69,8 @@ static void arm_nommu_dma_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { - const struct dma_map_ops *ops = &dma_noop_ops; - if (attrs & DMA_ATTR_NON_CONSISTENT) { - ops->free(dev, size, cpu_addr, dma_addr, attrs); + dma_direct_free(dev, size, cpu_addr, dma_addr, attrs); } else { int ret = dma_release_from_global_coherent(get_order(size), cpu_addr); @@ -213,7 +210,7 @@ EXPORT_SYMBOL(arm_nommu_dma_ops); static const struct dma_map_ops *arm_nommu_get_dma_map_ops(bool coherent) { - return coherent ? &dma_noop_ops : &arm_nommu_dma_ops; + return coherent ? &dma_direct_ops : &arm_nommu_dma_ops; } void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b488076..b2b95f7 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -59,6 +59,7 @@ config ARM64 select COMMON_CLK select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS + select DMA_DIRECT_OPS select EDAC_SUPPORT select FRAME_POINTER select GENERIC_ALLOCATOR @@ -227,7 +228,7 @@ config GENERIC_CSUM config GENERIC_CALIBRATE_DELAY def_bool y -config ZONE_DMA +config ZONE_DMA32 def_bool y config HAVE_GENERIC_GUP diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 0df756b..b7847eb 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -50,40 +50,5 @@ static inline bool is_device_dma_coherent(struct device *dev) return dev->archdata.dma_coherent; } -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - dma_addr_t dev_addr = (dma_addr_t)paddr; - - return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) -{ - phys_addr_t paddr = (phys_addr_t)dev_addr; - - return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - - return addr + size - 1 <= *dev->dma_mask; -} - -static inline void dma_mark_clean(void *addr, size_t size) -{ -} - -/* Override for dma_max_pfn() */ -static inline unsigned long dma_max_pfn(struct device *dev) -{ - dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask; - - return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT; -} -#define dma_max_pfn(dev) dma_max_pfn(dev) - #endif /* __KERNEL__ */ #endif /* __ASM_DMA_MAPPING_H */ diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index b45c5bc..a96ec01 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -24,7 +24,7 @@ #include <linux/export.h> #include <linux/slab.h> #include <linux/genalloc.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/dma-contiguous.h> #include <linux/vmalloc.h> #include <linux/swiotlb.h> @@ -91,46 +91,6 @@ static int __free_from_pool(void *start, size_t size) return 1; } -static void *__dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, - unsigned long attrs) -{ - if (IS_ENABLED(CONFIG_ZONE_DMA) && - dev->coherent_dma_mask <= DMA_BIT_MASK(32)) - flags |= GFP_DMA; - if (dev_get_cma_area(dev) && gfpflags_allow_blocking(flags)) { - struct page *page; - void *addr; - - page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT, - get_order(size), flags); - if (!page) - return NULL; - - *dma_handle = phys_to_dma(dev, page_to_phys(page)); - addr = page_address(page); - memset(addr, 0, size); - return addr; - } else { - return swiotlb_alloc_coherent(dev, size, dma_handle, flags); - } -} - -static void __dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - unsigned long attrs) -{ - bool freed; - phys_addr_t paddr = dma_to_phys(dev, dma_handle); - - - freed = dma_release_from_contiguous(dev, - phys_to_page(paddr), - size >> PAGE_SHIFT); - if (!freed) - swiotlb_free_coherent(dev, size, vaddr, dma_handle); -} - static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) @@ -152,7 +112,7 @@ static void *__dma_alloc(struct device *dev, size_t size, return addr; } - ptr = __dma_alloc_coherent(dev, size, dma_handle, flags, attrs); + ptr = swiotlb_alloc(dev, size, dma_handle, flags, attrs); if (!ptr) goto no_mem; @@ -173,7 +133,7 @@ static void *__dma_alloc(struct device *dev, size_t size, return coherent_ptr; no_map: - __dma_free_coherent(dev, size, ptr, *dma_handle, attrs); + swiotlb_free(dev, size, ptr, *dma_handle, attrs); no_mem: return NULL; } @@ -191,7 +151,7 @@ static void __dma_free(struct device *dev, size_t size, return; vunmap(vaddr); } - __dma_free_coherent(dev, size, swiotlb_addr, dma_handle, attrs); + swiotlb_free(dev, size, swiotlb_addr, dma_handle, attrs); } static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page, @@ -368,7 +328,7 @@ static int __swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t addr) return 0; } -static const struct dma_map_ops swiotlb_dma_ops = { +static const struct dma_map_ops arm64_swiotlb_dma_ops = { .alloc = __dma_alloc, .free = __dma_free, .mmap = __swiotlb_mmap, @@ -397,7 +357,7 @@ static int __init atomic_pool_init(void) page = dma_alloc_from_contiguous(NULL, nr_pages, pool_size_order, GFP_KERNEL); else - page = alloc_pages(GFP_DMA, pool_size_order); + page = alloc_pages(GFP_DMA32, pool_size_order); if (page) { int ret; @@ -923,7 +883,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, const struct iommu_ops *iommu, bool coherent) { if (!dev->dma_ops) - dev->dma_ops = &swiotlb_dma_ops; + dev->dma_ops = &arm64_swiotlb_dma_ops; dev->archdata.dma_coherent = coherent; __iommu_setup_dma_ops(dev, dma_base, size, iommu); diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index c903f7c..9f3c47a 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -217,7 +217,7 @@ static void __init reserve_elfcorehdr(void) } #endif /* CONFIG_CRASH_DUMP */ /* - * Return the maximum physical address for ZONE_DMA (DMA_BIT_MASK(32)). It + * Return the maximum physical address for ZONE_DMA32 (DMA_BIT_MASK(32)). It * currently assumes that for memory starting above 4G, 32-bit devices will * use a DMA offset. */ @@ -233,8 +233,8 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) { unsigned long max_zone_pfns[MAX_NR_ZONES] = {0}; - if (IS_ENABLED(CONFIG_ZONE_DMA)) - max_zone_pfns[ZONE_DMA] = PFN_DOWN(max_zone_dma_phys()); + if (IS_ENABLED(CONFIG_ZONE_DMA32)) + max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys()); max_zone_pfns[ZONE_NORMAL] = max; free_area_init_nodes(max_zone_pfns); @@ -251,9 +251,9 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) memset(zone_size, 0, sizeof(zone_size)); /* 4GB maximum for 32-bit only capable devices */ -#ifdef CONFIG_ZONE_DMA +#ifdef CONFIG_ZONE_DMA32 max_dma = PFN_DOWN(arm64_dma_phys_limit); - zone_size[ZONE_DMA] = max_dma - min; + zone_size[ZONE_DMA32] = max_dma - min; #endif zone_size[ZONE_NORMAL] = max - max_dma; @@ -266,10 +266,10 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) if (start >= max) continue; -#ifdef CONFIG_ZONE_DMA +#ifdef CONFIG_ZONE_DMA32 if (start < max_dma) { unsigned long dma_end = min(end, max_dma); - zhole_size[ZONE_DMA] -= dma_end - start; + zhole_size[ZONE_DMA32] -= dma_end - start; } #endif if (end > max_dma) { @@ -470,7 +470,7 @@ void __init arm64_memblock_init(void) early_init_fdt_scan_reserved_mem(); /* 4GB maximum for 32-bit only capable devices */ - if (IS_ENABLED(CONFIG_ZONE_DMA)) + if (IS_ENABLED(CONFIG_ZONE_DMA32)) arm64_dma_phys_limit = max_zone_dma_phys(); else arm64_dma_phys_limit = PHYS_MASK + 1; diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index 54d3f42..cd5a086 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -33,6 +33,9 @@ config GENERIC_CALIBRATE_DELAY config NO_IOPORT_MAP def_bool y if !PCI +config NO_DMA + def_bool y if !PCI + config FORCE_MAX_ZONEORDER int default 6 @@ -72,6 +75,7 @@ config CRIS select GENERIC_SCHED_CLOCK if ETRAX_ARCH_V32 select HAVE_DEBUG_BUGVERBOSE if ETRAX_ARCH_V32 select HAVE_NMI + select DMA_DIRECT_OPS if PCI config HZ int diff --git a/arch/cris/arch-v32/drivers/pci/Makefile b/arch/cris/arch-v32/drivers/pci/Makefile index bff7482..93c8be6 100644 --- a/arch/cris/arch-v32/drivers/pci/Makefile +++ b/arch/cris/arch-v32/drivers/pci/Makefile @@ -2,4 +2,4 @@ # Makefile for Etrax cardbus driver # -obj-$(CONFIG_ETRAX_CARDBUS) += bios.o dma.o +obj-$(CONFIG_ETRAX_CARDBUS) += bios.o diff --git a/arch/cris/arch-v32/drivers/pci/dma.c b/arch/cris/arch-v32/drivers/pci/dma.c deleted file mode 100644 index dbbd381..0000000 --- a/arch/cris/arch-v32/drivers/pci/dma.c +++ /dev/null @@ -1,80 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Dynamic DMA mapping support. - * - * On cris there is no hardware dynamic DMA address translation, - * so consistent alloc/free are merely page allocation/freeing. - * The rest of the dynamic DMA mapping interface is implemented - * in asm/pci.h. - * - * Borrowed from i386. - */ - -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/string.h> -#include <linux/pci.h> -#include <linux/gfp.h> -#include <asm/io.h> - -static void *v32_dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) -{ - void *ret; - - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - - if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) - gfp |= GFP_DMA; - - ret = (void *)__get_free_pages(gfp, get_order(size)); - - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_phys(ret); - } - return ret; -} - -static void v32_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - free_pages((unsigned long)vaddr, get_order(size)); -} - -static inline dma_addr_t v32_dma_map_page(struct device *dev, - struct page *page, unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - return page_to_phys(page) + offset; -} - -static inline int v32_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - printk("Map sg\n"); - return nents; -} - -static inline int v32_dma_supported(struct device *dev, u64 mask) -{ - /* - * we fall back to GFP_DMA when the mask isn't all 1s, - * so we can't guarantee allocations that must be - * within a tighter range than GFP_DMA.. - */ - if (mask < 0x00ffffff) - return 0; - return 1; -} - -const struct dma_map_ops v32_dma_ops = { - .alloc = v32_dma_alloc, - .free = v32_dma_free, - .map_page = v32_dma_map_page, - .map_sg = v32_dma_map_sg, - .dma_supported = v32_dma_supported, -}; -EXPORT_SYMBOL(v32_dma_ops); diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild index 460349c..8cf45ac 100644 --- a/arch/cris/include/asm/Kbuild +++ b/arch/cris/include/asm/Kbuild @@ -5,6 +5,7 @@ generic-y += cmpxchg.h generic-y += current.h generic-y += device.h generic-y += div64.h +generic-y += dma-mapping.h generic-y += emergency-restart.h generic-y += exec.h generic-y += extable.h diff --git a/arch/cris/include/asm/dma-mapping.h b/arch/cris/include/asm/dma-mapping.h deleted file mode 100644 index 1553bdb..0000000 --- a/arch/cris/include/asm/dma-mapping.h +++ /dev/null @@ -1,20 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_CRIS_DMA_MAPPING_H -#define _ASM_CRIS_DMA_MAPPING_H - -#ifdef CONFIG_PCI -extern const struct dma_map_ops v32_dma_ops; - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &v32_dma_ops; -} -#else -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - BUG(); - return NULL; -} -#endif - -#endif diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index f8d3fde..091d6d0 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -23,6 +23,7 @@ config H8300 select HAVE_ARCH_KGDB select HAVE_ARCH_HASH select CPU_NO_EFFICIENT_FFS + select DMA_DIRECT_OPS config CPU_BIG_ENDIAN def_bool y diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild index bc07749..642752c 100644 --- a/arch/h8300/include/asm/Kbuild +++ b/arch/h8300/include/asm/Kbuild @@ -9,6 +9,7 @@ generic-y += delay.h generic-y += device.h generic-y += div64.h generic-y += dma.h +generic-y += dma-mapping.h generic-y += emergency-restart.h generic-y += exec.h generic-y += extable.h diff --git a/arch/h8300/include/asm/dma-mapping.h b/arch/h8300/include/asm/dma-mapping.h deleted file mode 100644 index 21bb1fc..0000000 --- a/arch/h8300/include/asm/dma-mapping.h +++ /dev/null @@ -1,12 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _H8300_DMA_MAPPING_H -#define _H8300_DMA_MAPPING_H - -extern const struct dma_map_ops h8300_dma_map_ops; - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &h8300_dma_map_ops; -} - -#endif diff --git a/arch/h8300/kernel/Makefile b/arch/h8300/kernel/Makefile index b62e830..307aa51 100644 --- a/arch/h8300/kernel/Makefile +++ b/arch/h8300/kernel/Makefile @@ -7,7 +7,7 @@ extra-y := vmlinux.lds obj-y := process.o traps.o ptrace.o \ signal.o setup.o syscalls.o \ - irq.o entry.o dma.o + irq.o entry.o obj-$(CONFIG_ROMKERNEL) += head_rom.o obj-$(CONFIG_RAMKERNEL) += head_ram.o diff --git a/arch/h8300/kernel/dma.c b/arch/h8300/kernel/dma.c deleted file mode 100644 index 225dd0a..0000000 --- a/arch/h8300/kernel/dma.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -#include <linux/dma-mapping.h> -#include <linux/kernel.h> -#include <linux/scatterlist.h> -#include <linux/module.h> -#include <asm/pgalloc.h> - -static void *dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - void *ret; - - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - - if (dev == NULL || (*dev->dma_mask < 0xffffffff)) - gfp |= GFP_DMA; - ret = (void *)__get_free_pages(gfp, get_order(size)); - - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_phys(ret); - } - return ret; -} - -static void dma_free(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - unsigned long attrs) - -{ - free_pages((unsigned long)vaddr, get_order(size)); -} - -static dma_addr_t map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, - unsigned long attrs) -{ - return page_to_phys(page) + offset; -} - -static int map_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - struct scatterlist *sg; - int i; - - for_each_sg(sgl, sg, nents, i) { - sg->dma_address = sg_phys(sg); - } - - return nents; -} - -const struct dma_map_ops h8300_dma_map_ops = { - .alloc = dma_alloc, - .free = dma_free, - .map_page = map_page, - .map_sg = map_sg, -}; -EXPORT_SYMBOL(h8300_dma_map_ops); diff --git a/arch/hexagon/include/asm/dma-mapping.h b/arch/hexagon/include/asm/dma-mapping.h index 5208de2..263f6ac 100644 --- a/arch/hexagon/include/asm/dma-mapping.h +++ b/arch/hexagon/include/asm/dma-mapping.h @@ -37,11 +37,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return dma_ops; } -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return 0; - return addr + size - 1 <= *dev->dma_mask; -} - #endif diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h index 66f5e9a..9e8621d 100644 --- a/arch/hexagon/include/asm/io.h +++ b/arch/hexagon/include/asm/io.h @@ -330,8 +330,6 @@ static inline void outsl(unsigned long port, const void *buffer, int count) } } -#define flush_write_buffers() do { } while (0) - #endif /* __KERNEL__ */ #endif diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c index 546792d..ad8347c 100644 --- a/arch/hexagon/kernel/dma.c +++ b/arch/hexagon/kernel/dma.c @@ -19,6 +19,7 @@ */ #include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/bootmem.h> #include <linux/genalloc.h> #include <asm/dma-mapping.h> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 315c51f..bbe12a0 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -33,6 +33,7 @@ config IA64 select HAVE_MEMBLOCK select HAVE_MEMBLOCK_NODE_MAP select HAVE_VIRT_CPU_ACCOUNTING + select ARCH_HAS_DMA_MARK_CLEAN select ARCH_HAS_SG_CHAIN select VIRT_TO_BUS select ARCH_DISCARD_MEMBLOCK @@ -65,7 +66,7 @@ config 64BIT select ATA_NONSTANDARD if ATA default y -config ZONE_DMA +config ZONE_DMA32 def_bool y depends on !IA64_SGI_SN2 @@ -145,6 +146,7 @@ config IA64_GENERIC bool "generic" select NUMA select ACPI_NUMA + select DMA_DIRECT_OPS select SWIOTLB select PCI_MSI help @@ -165,6 +167,7 @@ config IA64_GENERIC config IA64_DIG bool "DIG-compliant" + select DMA_DIRECT_OPS select SWIOTLB config IA64_DIG_VTD @@ -180,6 +183,7 @@ config IA64_HP_ZX1 config IA64_HP_ZX1_SWIOTLB bool "HP-zx1/sx1000 with software I/O TLB" + select DMA_DIRECT_OPS select SWIOTLB help Build a kernel that runs on HP zx1 and sx1000 systems even when they @@ -203,6 +207,7 @@ config IA64_SGI_UV bool "SGI-UV" select NUMA select ACPI_NUMA + select DMA_DIRECT_OPS select SWIOTLB help Selecting this option will optimize the kernel for use on UV based @@ -213,6 +218,7 @@ config IA64_SGI_UV config IA64_HP_SIM bool "Ski-simulator" + select DMA_DIRECT_OPS select SWIOTLB depends on !PM diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c index 63d8e1d..5896903 100644 --- a/arch/ia64/hp/common/hwsw_iommu.c +++ b/arch/ia64/hp/common/hwsw_iommu.c @@ -19,7 +19,7 @@ #include <linux/export.h> #include <asm/machvec.h> -extern const struct dma_map_ops sba_dma_ops, swiotlb_dma_ops; +extern const struct dma_map_ops sba_dma_ops; /* swiotlb declarations & definitions: */ extern int swiotlb_late_init_with_default_size (size_t size); diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h index c1bab52..76e4d66 100644 --- a/arch/ia64/include/asm/dma-mapping.h +++ b/arch/ia64/include/asm/dma-mapping.h @@ -8,7 +8,6 @@ */ #include <asm/machvec.h> #include <linux/scatterlist.h> -#include <asm/swiotlb.h> #include <linux/dma-debug.h> #define ARCH_HAS_DMA_GET_REQUIRED_MASK @@ -27,22 +26,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return platform_dma_get_ops(NULL); } -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return 0; - - return addr + size - 1 <= *dev->dma_mask; -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr; -} - #endif /* _ASM_IA64_DMA_MAPPING_H */ diff --git a/arch/ia64/include/asm/dma.h b/arch/ia64/include/asm/dma.h index 186850e..23604d6 100644 --- a/arch/ia64/include/asm/dma.h +++ b/arch/ia64/include/asm/dma.h @@ -20,6 +20,4 @@ extern unsigned long MAX_DMA_ADDRESS; #define free_dma(x) -void dma_mark_clean(void *addr, size_t size); - #endif /* _ASM_IA64_DMA_H */ diff --git a/arch/ia64/include/asm/swiotlb.h b/arch/ia64/include/asm/swiotlb.h deleted file mode 100644 index 841e2c7..0000000 --- a/arch/ia64/include/asm/swiotlb.h +++ /dev/null @@ -1,18 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ASM_IA64__SWIOTLB_H -#define ASM_IA64__SWIOTLB_H - -#include <linux/dma-mapping.h> -#include <linux/swiotlb.h> - -#ifdef CONFIG_SWIOTLB -extern int swiotlb; -extern void pci_swiotlb_init(void); -#else -#define swiotlb 0 -static inline void pci_swiotlb_init(void) -{ -} -#endif - -#endif /* ASM_IA64__SWIOTLB_H */ diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c index 7a82c92..f2d57e6 100644 --- a/arch/ia64/kernel/dma-mapping.c +++ b/arch/ia64/kernel/dma-mapping.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/dma-mapping.h> +#include <linux/swiotlb.h> #include <linux/export.h> /* Set this to 1 if there is a HW IOMMU in the system */ @@ -23,3 +24,11 @@ const struct dma_map_ops *dma_get_ops(struct device *dev) return dma_ops; } EXPORT_SYMBOL(dma_get_ops); + +#ifdef CONFIG_SWIOTLB +void __init swiotlb_dma_init(void) +{ + dma_ops = &swiotlb_dma_ops; + swiotlb_init(1); +} +#endif diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c index 3ba87c2..b5df084 100644 --- a/arch/ia64/kernel/pci-dma.c +++ b/arch/ia64/kernel/pci-dma.c @@ -12,12 +12,7 @@ #include <asm/iommu.h> #include <asm/machvec.h> #include <linux/dma-mapping.h> - - -#ifdef CONFIG_INTEL_IOMMU - #include <linux/kernel.h> - #include <asm/page.h> dma_addr_t bad_dma_address __read_mostly; @@ -104,8 +99,14 @@ void __init pci_iommu_alloc(void) detect_intel_iommu(); #ifdef CONFIG_SWIOTLB - pci_swiotlb_init(); -#endif + if (!iommu_detected) { +#ifdef CONFIG_IA64_GENERIC + printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n"); + machvec_init("dig"); + swiotlb_dma_init(); +#else + panic("Unable to find Intel IOMMU"); +#endif /* CONFIG_IA64_GENERIC */ + } +#endif /* CONFIG_SWIOTLB */ } - -#endif diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c deleted file mode 100644 index 5e50939..0000000 --- a/arch/ia64/kernel/pci-swiotlb.c +++ /dev/null @@ -1,68 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Glue code to lib/swiotlb.c */ - -#include <linux/pci.h> -#include <linux/gfp.h> -#include <linux/cache.h> -#include <linux/module.h> -#include <linux/dma-mapping.h> - -#include <asm/swiotlb.h> -#include <asm/dma.h> -#include <asm/iommu.h> -#include <asm/machvec.h> - -int swiotlb __read_mostly; -EXPORT_SYMBOL(swiotlb); - -static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - if (dev->coherent_dma_mask != DMA_BIT_MASK(64)) - gfp |= GFP_DMA; - return swiotlb_alloc_coherent(dev, size, dma_handle, gfp); -} - -static void ia64_swiotlb_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_addr, - unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_addr); -} - -const struct dma_map_ops swiotlb_dma_ops = { - .alloc = ia64_swiotlb_alloc_coherent, - .free = ia64_swiotlb_free_coherent, - .map_page = swiotlb_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = swiotlb_map_sg_attrs, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = swiotlb_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = swiotlb_sync_sg_for_device, - .dma_supported = swiotlb_dma_supported, - .mapping_error = swiotlb_dma_mapping_error, -}; - -void __init swiotlb_dma_init(void) -{ - dma_ops = &swiotlb_dma_ops; - swiotlb_init(1); -} - -void __init pci_swiotlb_init(void) -{ - if (!iommu_detected) { -#ifdef CONFIG_IA64_GENERIC - swiotlb = 1; - printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n"); - machvec_init("dig"); - swiotlb_init(1); - dma_ops = &swiotlb_dma_ops; -#else - panic("Unable to find Intel IOMMU"); -#endif - } -} diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c index 52715a7..7d64b30 100644 --- a/arch/ia64/mm/contig.c +++ b/arch/ia64/mm/contig.c @@ -237,9 +237,9 @@ paging_init (void) unsigned long max_zone_pfns[MAX_NR_ZONES]; memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); -#ifdef CONFIG_ZONE_DMA +#ifdef CONFIG_ZONE_DMA32 max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; - max_zone_pfns[ZONE_DMA] = max_dma; + max_zone_pfns[ZONE_DMA32] = max_dma; #endif max_zone_pfns[ZONE_NORMAL] = max_low_pfn; diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 9b2d994..ac46f0d 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -38,7 +38,7 @@ struct early_node_data { struct ia64_node_data *node_data; unsigned long pernode_addr; unsigned long pernode_size; -#ifdef CONFIG_ZONE_DMA +#ifdef CONFIG_ZONE_DMA32 unsigned long num_dma_physpages; #endif unsigned long min_pfn; @@ -669,7 +669,7 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n { unsigned long end = start + len; -#ifdef CONFIG_ZONE_DMA +#ifdef CONFIG_ZONE_DMA32 if (start <= __pa(MAX_DMA_ADDRESS)) mem_data[node].num_dma_physpages += (min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT; @@ -724,8 +724,8 @@ void __init paging_init(void) } memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); -#ifdef CONFIG_ZONE_DMA - max_zone_pfns[ZONE_DMA] = max_dma; +#ifdef CONFIG_ZONE_DMA32 + max_zone_pfns[ZONE_DMA32] = max_dma; #endif max_zone_pfns[ZONE_NORMAL] = max_pfn; free_area_init_nodes(max_zone_pfns); diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index 498398d..dd84ee1 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -19,7 +19,7 @@ config M32R select MODULES_USE_ELF_RELA select HAVE_DEBUG_STACKOVERFLOW select CPU_NO_EFFICIENT_FFS - select DMA_NOOP_OPS + select DMA_DIRECT_OPS select ARCH_NO_COHERENT_DMA_MMAP if !MMU config SBUS diff --git a/arch/m32r/include/asm/Kbuild b/arch/m32r/include/asm/Kbuild index 7e11b12..ca83fda 100644 --- a/arch/m32r/include/asm/Kbuild +++ b/arch/m32r/include/asm/Kbuild @@ -1,5 +1,6 @@ generic-y += clkdev.h generic-y += current.h +generic-y += dma-mapping.h generic-y += exec.h generic-y += extable.h generic-y += irq_work.h diff --git a/arch/m32r/include/asm/dma-mapping.h b/arch/m32r/include/asm/dma-mapping.h deleted file mode 100644 index 336ffe6..0000000 --- a/arch/m32r/include/asm/dma-mapping.h +++ /dev/null @@ -1,24 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_M32R_DMA_MAPPING_H -#define _ASM_M32R_DMA_MAPPING_H - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/scatterlist.h> -#include <linux/dma-debug.h> -#include <linux/io.h> - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &dma_noop_ops; -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - return addr + size - 1 <= *dev->dma_mask; -} - -#endif /* _ASM_M32R_DMA_MAPPING_H */ diff --git a/arch/m32r/include/asm/io.h b/arch/m32r/include/asm/io.h index 1b653bb..a4272d8 100644 --- a/arch/m32r/include/asm/io.h +++ b/arch/m32r/include/asm/io.h @@ -191,8 +191,6 @@ static inline void _writel(unsigned long l, unsigned long addr) #define mmiowb() -#define flush_write_buffers() do { } while (0) /* M32R_FIXME */ - static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) { diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index 87ef73a..c01b9b8 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -76,8 +76,6 @@ static void *m68k_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { void *ret; - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); if (dev == NULL || (*dev->dma_mask < 0xffffffff)) gfp |= GFP_DMA; diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h index 6b9ea39..add50c1 100644 --- a/arch/microblaze/include/asm/dma-mapping.h +++ b/arch/microblaze/include/asm/dma-mapping.h @@ -18,11 +18,11 @@ /* * Available generic sets of operations */ -extern const struct dma_map_ops dma_direct_ops; +extern const struct dma_map_ops dma_nommu_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { - return &dma_direct_ops; + return &dma_nommu_ops; } #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c index 990bf9e..c91e8ce 100644 --- a/arch/microblaze/kernel/dma.c +++ b/arch/microblaze/kernel/dma.c @@ -15,42 +15,18 @@ #include <linux/bug.h> #include <asm/cacheflush.h> -#define NOT_COHERENT_CACHE - -static void *dma_direct_alloc_coherent(struct device *dev, size_t size, +static void *dma_nommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { -#ifdef NOT_COHERENT_CACHE return consistent_alloc(flag, size, dma_handle); -#else - void *ret; - struct page *page; - int node = dev_to_node(dev); - - /* ignore region specifiers */ - flag &= ~(__GFP_HIGHMEM); - - page = alloc_pages_node(node, flag, get_order(size)); - if (page == NULL) - return NULL; - ret = page_address(page); - memset(ret, 0, size); - *dma_handle = virt_to_phys(ret); - - return ret; -#endif } -static void dma_direct_free_coherent(struct device *dev, size_t size, +static void dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { -#ifdef NOT_COHERENT_CACHE consistent_free(size, vaddr); -#else - free_pages((unsigned long)vaddr, get_order(size)); -#endif } static inline void __dma_sync(unsigned long paddr, @@ -69,7 +45,7 @@ static inline void __dma_sync(unsigned long paddr, } } -static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, +static int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction, unsigned long attrs) { @@ -89,12 +65,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, return nents; } -static int dma_direct_dma_supported(struct device *dev, u64 mask) -{ - return 1; -} - -static inline dma_addr_t dma_direct_map_page(struct device *dev, +static inline dma_addr_t dma_nommu_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, @@ -106,7 +77,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, return page_to_phys(page) + offset; } -static inline void dma_direct_unmap_page(struct device *dev, +static inline void dma_nommu_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, enum dma_data_direction direction, @@ -122,7 +93,7 @@ static inline void dma_direct_unmap_page(struct device *dev, } static inline void -dma_direct_sync_single_for_cpu(struct device *dev, +dma_nommu_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { @@ -136,7 +107,7 @@ dma_direct_sync_single_for_cpu(struct device *dev, } static inline void -dma_direct_sync_single_for_device(struct device *dev, +dma_nommu_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { @@ -150,7 +121,7 @@ dma_direct_sync_single_for_device(struct device *dev, } static inline void -dma_direct_sync_sg_for_cpu(struct device *dev, +dma_nommu_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { @@ -164,7 +135,7 @@ dma_direct_sync_sg_for_cpu(struct device *dev, } static inline void -dma_direct_sync_sg_for_device(struct device *dev, +dma_nommu_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { @@ -178,7 +149,7 @@ dma_direct_sync_sg_for_device(struct device *dev, } static -int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, +int dma_nommu_mmap_coherent(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t handle, size_t size, unsigned long attrs) { @@ -191,12 +162,8 @@ int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, if (off >= count || user_count > (count - off)) return -ENXIO; -#ifdef NOT_COHERENT_CACHE vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); pfn = consistent_virt_to_pfn(cpu_addr); -#else - pfn = virt_to_pfn(cpu_addr); -#endif return remap_pfn_range(vma, vma->vm_start, pfn + off, vma->vm_end - vma->vm_start, vma->vm_page_prot); #else @@ -204,20 +171,19 @@ int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, #endif } -const struct dma_map_ops dma_direct_ops = { - .alloc = dma_direct_alloc_coherent, - .free = dma_direct_free_coherent, - .mmap = dma_direct_mmap_coherent, - .map_sg = dma_direct_map_sg, - .dma_supported = dma_direct_dma_supported, - .map_page = dma_direct_map_page, - .unmap_page = dma_direct_unmap_page, - .sync_single_for_cpu = dma_direct_sync_single_for_cpu, - .sync_single_for_device = dma_direct_sync_single_for_device, - .sync_sg_for_cpu = dma_direct_sync_sg_for_cpu, - .sync_sg_for_device = dma_direct_sync_sg_for_device, +const struct dma_map_ops dma_nommu_ops = { + .alloc = dma_nommu_alloc_coherent, + .free = dma_nommu_free_coherent, + .mmap = dma_nommu_mmap_coherent, + .map_sg = dma_nommu_map_sg, + .map_page = dma_nommu_map_page, + .unmap_page = dma_nommu_unmap_page, + .sync_single_for_cpu = dma_nommu_sync_single_for_cpu, + .sync_single_for_device = dma_nommu_sync_single_for_device, + .sync_sg_for_cpu = dma_nommu_sync_sg_for_cpu, + .sync_sg_for_device = dma_nommu_sync_sg_for_device, }; -EXPORT_SYMBOL(dma_direct_ops); +EXPORT_SYMBOL(dma_nommu_ops); /* Number of entries preallocated for DMA-API debugging */ #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 8e0b370..ab98569 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -431,6 +431,7 @@ config MACH_LOONGSON32 config MACH_LOONGSON64 bool "Loongson-2/3 family of machines" + select ARCH_HAS_PHYS_TO_DMA select SYS_SUPPORTS_ZBOOT help This enables the support of Loongson-2/3 family of machines. @@ -880,6 +881,7 @@ config MIKROTIK_RB532 config CAVIUM_OCTEON_SOC bool "Cavium Networks Octeon SoC based boards" select CEVT_R4K + select ARCH_HAS_PHYS_TO_DMA select ARCH_PHYS_ADDR_T_64BIT select DMA_COHERENT select SYS_SUPPORTS_64BIT_KERNEL diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig index 204a167..b5eee1a 100644 --- a/arch/mips/cavium-octeon/Kconfig +++ b/arch/mips/cavium-octeon/Kconfig @@ -75,6 +75,7 @@ config NEED_SG_DMA_LENGTH config SWIOTLB def_bool y + select DMA_DIRECT_OPS select IOMMU_HELPER select NEED_SG_DMA_LENGTH diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index c64bd87..c7bb8a4 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -159,36 +159,13 @@ static void octeon_dma_sync_sg_for_device(struct device *dev, static void *octeon_dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { - void *ret; - - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); - - if (IS_ENABLED(CONFIG_ZONE_DMA) && dev == NULL) - gfp |= __GFP_DMA; - else if (IS_ENABLED(CONFIG_ZONE_DMA) && - dev->coherent_dma_mask <= DMA_BIT_MASK(24)) - gfp |= __GFP_DMA; - else if (IS_ENABLED(CONFIG_ZONE_DMA32) && - dev->coherent_dma_mask <= DMA_BIT_MASK(32)) - gfp |= __GFP_DMA32; - - /* Don't invoke OOM killer */ - gfp |= __GFP_NORETRY; - - ret = swiotlb_alloc_coherent(dev, size, dma_handle, gfp); + void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs); mb(); return ret; } -static void octeon_dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_handle); -} - static dma_addr_t octeon_unity_phys_to_dma(struct device *dev, phys_addr_t paddr) { return paddr; @@ -228,7 +205,7 @@ EXPORT_SYMBOL(dma_to_phys); static struct octeon_dma_map_ops octeon_linear_dma_map_ops = { .dma_map_ops = { .alloc = octeon_dma_alloc_coherent, - .free = octeon_dma_free_coherent, + .free = swiotlb_free, .map_page = octeon_dma_map_page, .unmap_page = swiotlb_unmap_page, .map_sg = octeon_dma_map_sg, @@ -314,7 +291,7 @@ void __init plat_swiotlb_setup(void) static struct octeon_dma_map_ops _octeon_pci_dma_map_ops = { .dma_map_ops = { .alloc = octeon_dma_alloc_coherent, - .free = octeon_dma_free_coherent, + .free = swiotlb_free, .map_page = octeon_dma_map_page, .unmap_page = swiotlb_unmap_page, .map_sg = octeon_dma_map_sg, diff --git a/arch/mips/include/asm/dma-direct.h b/arch/mips/include/asm/dma-direct.h new file mode 100644 index 0000000..f32f155 --- /dev/null +++ b/arch/mips/include/asm/dma-direct.h @@ -0,0 +1 @@ +#include <asm/dma-coherence.h> diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index 0d9418d..886e75a 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -17,16 +17,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return mips_dma_map_ops; } -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - - return addr + size <= *dev->dma_mask; -} - -static inline void dma_mark_clean(void *addr, size_t size) {} - #define arch_setup_dma_ops arch_setup_dma_ops static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, const struct iommu_ops *iommu, diff --git a/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h index 9110988..138edf6 100644 --- a/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h +++ b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h @@ -61,6 +61,14 @@ static inline void plat_post_dma_flush(struct device *dev) { } +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return false; + + return addr + size - 1 <= *dev->dma_mask; +} + dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h index 61addb1..8ad7a40c 100644 --- a/arch/mips/include/asm/mach-generic/dma-coherence.h +++ b/arch/mips/include/asm/mach-generic/dma-coherence.h @@ -70,16 +70,4 @@ static inline void plat_post_dma_flush(struct device *dev) } #endif -#ifdef CONFIG_SWIOTLB -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr; -} -#endif - #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */ diff --git a/arch/mips/include/asm/mach-loongson64/dma-coherence.h b/arch/mips/include/asm/mach-loongson64/dma-coherence.h index 1602a9e..b1b575f 100644 --- a/arch/mips/include/asm/mach-loongson64/dma-coherence.h +++ b/arch/mips/include/asm/mach-loongson64/dma-coherence.h @@ -17,6 +17,14 @@ struct device; +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return false; + + return addr + size - 1 <= *dev->dma_mask; +} + extern dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); extern phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, diff --git a/arch/mips/include/asm/netlogic/common.h b/arch/mips/include/asm/netlogic/common.h index a6e6cbe..5761664 100644 --- a/arch/mips/include/asm/netlogic/common.h +++ b/arch/mips/include/asm/netlogic/common.h @@ -87,9 +87,6 @@ unsigned int nlm_get_cpu_frequency(void); extern const struct plat_smp_ops nlm_smp_ops; extern char nlm_reset_entry[], nlm_reset_entry_end[]; -/* SWIOTLB */ -extern const struct dma_map_ops nlm_swiotlb_dma_ops; - extern unsigned int nlm_threads_per_core; extern cpumask_t nlm_cpumask; diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig index 0d249fc..6f109bb 100644 --- a/arch/mips/loongson64/Kconfig +++ b/arch/mips/loongson64/Kconfig @@ -136,6 +136,7 @@ config SWIOTLB bool "Soft IOMMU Support for All-Memory DMA" default y depends on CPU_LOONGSON3 + select DMA_DIRECT_OPS select IOMMU_HELPER select NEED_SG_DMA_LENGTH select NEED_DMA_MAP_STATE diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/common/dma-swiotlb.c index ef07740..7bbcf89 100644 --- a/arch/mips/loongson64/common/dma-swiotlb.c +++ b/arch/mips/loongson64/common/dma-swiotlb.c @@ -13,32 +13,12 @@ static void *loongson_dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { - void *ret; + void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs); - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); - - if ((IS_ENABLED(CONFIG_ISA) && dev == NULL) || - (IS_ENABLED(CONFIG_ZONE_DMA) && - dev->coherent_dma_mask < DMA_BIT_MASK(32))) - gfp |= __GFP_DMA; - else if (IS_ENABLED(CONFIG_ZONE_DMA32) && - dev->coherent_dma_mask < DMA_BIT_MASK(40)) - gfp |= __GFP_DMA32; - - gfp |= __GFP_NORETRY; - - ret = swiotlb_alloc_coherent(dev, size, dma_handle, gfp); mb(); return ret; } -static void loongson_dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_handle); -} - static dma_addr_t loongson_dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, @@ -109,7 +89,7 @@ phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) static const struct dma_map_ops loongson_dma_map_ops = { .alloc = loongson_dma_alloc_coherent, - .free = loongson_dma_free_coherent, + .free = swiotlb_free, .map_page = loongson_dma_map_page, .unmap_page = swiotlb_unmap_page, .map_sg = loongson_dma_map_sg, diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index e3e94d0..237532e 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -93,9 +93,6 @@ static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp) { gfp_t dma_flag; - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); - #ifdef CONFIG_ISA if (dev == NULL) dma_flag = __GFP_DMA; diff --git a/arch/mips/netlogic/Kconfig b/arch/mips/netlogic/Kconfig index 8296b13..7fcfc7f 100644 --- a/arch/mips/netlogic/Kconfig +++ b/arch/mips/netlogic/Kconfig @@ -89,9 +89,4 @@ config IOMMU_HELPER config NEED_SG_DMA_LENGTH bool -config SWIOTLB - def_bool y - select NEED_SG_DMA_LENGTH - select IOMMU_HELPER - endif diff --git a/arch/mips/netlogic/common/Makefile b/arch/mips/netlogic/common/Makefile index 60d00b5..89f6e3f 100644 --- a/arch/mips/netlogic/common/Makefile +++ b/arch/mips/netlogic/common/Makefile @@ -1,6 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 obj-y += irq.o time.o -obj-y += nlm-dma.o obj-y += reset.o obj-$(CONFIG_SMP) += smp.o smpboot.o obj-$(CONFIG_EARLY_PRINTK) += earlycons.o diff --git a/arch/mips/netlogic/common/nlm-dma.c b/arch/mips/netlogic/common/nlm-dma.c deleted file mode 100644 index 0ec9d9d..0000000 --- a/arch/mips/netlogic/common/nlm-dma.c +++ /dev/null @@ -1,97 +0,0 @@ -/* -* Copyright (C) 2003-2013 Broadcom Corporation -* All Rights Reserved - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the Broadcom - * license below: - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE - * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN - * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ -#include <linux/dma-mapping.h> -#include <linux/scatterlist.h> -#include <linux/bootmem.h> -#include <linux/export.h> -#include <linux/swiotlb.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/mm.h> - -#include <asm/bootinfo.h> - -static char *nlm_swiotlb; - -static void *nlm_dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) -{ - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); - -#ifdef CONFIG_ZONE_DMA32 - if (dev->coherent_dma_mask <= DMA_BIT_MASK(32)) - gfp |= __GFP_DMA32; -#endif - - /* Don't invoke OOM killer */ - gfp |= __GFP_NORETRY; - - return swiotlb_alloc_coherent(dev, size, dma_handle, gfp); -} - -static void nlm_dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_handle); -} - -const struct dma_map_ops nlm_swiotlb_dma_ops = { - .alloc = nlm_dma_alloc_coherent, - .free = nlm_dma_free_coherent, - .map_page = swiotlb_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = swiotlb_map_sg_attrs, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = swiotlb_sync_single_for_device, - .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 = swiotlb_dma_supported -}; - -void __init plat_swiotlb_setup(void) -{ - size_t swiotlbsize; - unsigned long swiotlb_nslabs; - - swiotlbsize = 1 << 20; /* 1 MB for now */ - swiotlb_nslabs = swiotlbsize >> IO_TLB_SHIFT; - swiotlb_nslabs = ALIGN(swiotlb_nslabs, IO_TLB_SEGSIZE); - swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT; - - nlm_swiotlb = alloc_bootmem_low_pages(swiotlbsize); - swiotlb_init_with_tbl(nlm_swiotlb, swiotlb_nslabs, 1); -} diff --git a/arch/mn10300/mm/dma-alloc.c b/arch/mn10300/mm/dma-alloc.c index 86108d2..e3910d4 100644 --- a/arch/mn10300/mm/dma-alloc.c +++ b/arch/mn10300/mm/dma-alloc.c @@ -37,9 +37,6 @@ static void *mn10300_dma_alloc(struct device *dev, size_t size, goto done; } - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - if (dev == NULL || dev->coherent_dma_mask < 0xffffffff) gfp |= GFP_DMA; diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c index 7040c1a..4be8155 100644 --- a/arch/nios2/mm/dma-mapping.c +++ b/arch/nios2/mm/dma-mapping.c @@ -63,9 +63,6 @@ static void *nios2_dma_alloc(struct device *dev, size_t size, { void *ret; - /* ignore region specifiers */ - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - /* optimized page clearing */ gfp |= __GFP_ZERO; diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index c0dfd89..91bc0ca 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -75,11 +75,6 @@ void dump_resmap(void) static inline void dump_resmap(void) {;} #endif -static int pa11_dma_supported( struct device *dev, u64 mask) -{ - return 1; -} - static inline int map_pte_uncached(pte_t * pte, unsigned long vaddr, unsigned long size, unsigned long *paddr_ptr) @@ -579,7 +574,6 @@ static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size, } const struct dma_map_ops pcxl_dma_ops = { - .dma_supported = pa11_dma_supported, .alloc = pa11_dma_alloc, .free = pa11_dma_free, .map_page = pa11_dma_map_page, @@ -616,7 +610,6 @@ static void pcx_dma_free(struct device *dev, size_t size, void *vaddr, } const struct dma_map_ops pcx_dma_ops = { - .dma_supported = pa11_dma_supported, .alloc = pcx_dma_alloc, .free = pcx_dma_free, .map_page = pa11_dma_map_page, diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 2ed525a..e92432a 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -139,6 +139,7 @@ config PPC select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL + select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PMEM_API if PPC64 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE select ARCH_HAS_SG_CHAIN diff --git a/arch/powerpc/include/asm/dma-direct.h b/arch/powerpc/include/asm/dma-direct.h new file mode 100644 index 0000000..a5b59c7 --- /dev/null +++ b/arch/powerpc/include/asm/dma-direct.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ASM_POWERPC_DMA_DIRECT_H +#define ASM_POWERPC_DMA_DIRECT_H 1 + +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ +#ifdef CONFIG_SWIOTLB + struct dev_archdata *sd = &dev->archdata; + + if (sd->max_direct_dma_addr && addr + size > sd->max_direct_dma_addr) + return false; +#endif + + if (!dev->dma_mask) + return false; + + return addr + size - 1 <= *dev->dma_mask; +} + +static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + return paddr + get_dma_offset(dev); +} + +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) +{ + return daddr - get_dma_offset(dev); +} +#endif /* ASM_POWERPC_DMA_DIRECT_H */ diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 5a6cbe1..8fa3945 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -19,13 +19,13 @@ #include <asm/swiotlb.h> /* Some dma direct funcs must be visible for use in other dma_ops */ -extern void *__dma_direct_alloc_coherent(struct device *dev, size_t size, +extern void *__dma_nommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs); -extern void __dma_direct_free_coherent(struct device *dev, size_t size, +extern void __dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs); -extern int dma_direct_mmap_coherent(struct device *dev, +extern int dma_nommu_mmap_coherent(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t handle, size_t size, unsigned long attrs); @@ -73,7 +73,7 @@ static inline unsigned long device_to_mask(struct device *dev) #ifdef CONFIG_PPC64 extern struct dma_map_ops dma_iommu_ops; #endif -extern const struct dma_map_ops dma_direct_ops; +extern const struct dma_map_ops dma_nommu_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { @@ -107,39 +107,11 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off) dev->archdata.dma_offset = off; } -/* this will be removed soon */ -#define flush_write_buffers() - #define HAVE_ARCH_DMA_SET_MASK 1 extern int dma_set_mask(struct device *dev, u64 dma_mask); extern u64 __dma_get_required_mask(struct device *dev); -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ -#ifdef CONFIG_SWIOTLB - struct dev_archdata *sd = &dev->archdata; - - if (sd->max_direct_dma_addr && addr + size > sd->max_direct_dma_addr) - return false; -#endif - - if (!dev->dma_mask) - return false; - - return addr + size - 1 <= *dev->dma_mask; -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr + get_dma_offset(dev); -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr - get_dma_offset(dev); -} - #define ARCH_HAS_DMA_MMAP_COHERENT #endif /* __KERNEL__ */ diff --git a/arch/powerpc/include/asm/swiotlb.h b/arch/powerpc/include/asm/swiotlb.h index 01d45a5..f65ecf5 100644 --- a/arch/powerpc/include/asm/swiotlb.h +++ b/arch/powerpc/include/asm/swiotlb.h @@ -13,9 +13,7 @@ #include <linux/swiotlb.h> -extern const struct dma_map_ops swiotlb_dma_ops; - -static inline void dma_mark_clean(void *addr, size_t size) {} +extern const struct dma_map_ops powerpc_swiotlb_dma_ops; extern unsigned int ppc_swiotlb_enable; int __init swiotlb_setup_bus_notifier(void); diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 66f33e7..f9fe208 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -114,7 +114,7 @@ int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr) struct dma_map_ops dma_iommu_ops = { .alloc = dma_iommu_alloc_coherent, .free = dma_iommu_free_coherent, - .mmap = dma_direct_mmap_coherent, + .mmap = dma_nommu_mmap_coherent, .map_sg = dma_iommu_map_sg, .unmap_sg = dma_iommu_unmap_sg, .dma_supported = dma_iommu_dma_supported, diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index d0ea786..88f3963 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -46,10 +46,10 @@ static u64 swiotlb_powerpc_get_required(struct device *dev) * map_page, and unmap_page on highmem, use normal dma_ops * for everything else. */ -const struct dma_map_ops swiotlb_dma_ops = { - .alloc = __dma_direct_alloc_coherent, - .free = __dma_direct_free_coherent, - .mmap = dma_direct_mmap_coherent, +const struct dma_map_ops powerpc_swiotlb_dma_ops = { + .alloc = __dma_nommu_alloc_coherent, + .free = __dma_nommu_free_coherent, + .mmap = dma_nommu_mmap_coherent, .map_sg = swiotlb_map_sg_attrs, .unmap_sg = swiotlb_unmap_sg_attrs, .dma_supported = swiotlb_dma_supported, @@ -89,7 +89,7 @@ static int ppc_swiotlb_bus_notify(struct notifier_block *nb, /* May need to bounce if the device can't address all of DRAM */ if ((dma_get_mask(dev) + 1) < memblock_end_of_DRAM()) - set_dma_ops(dev, &swiotlb_dma_ops); + set_dma_ops(dev, &powerpc_swiotlb_dma_ops); return NOTIFY_DONE; } @@ -121,7 +121,7 @@ static int __init check_swiotlb_enabled(void) if (ppc_swiotlb_enable) swiotlb_print_info(); else - swiotlb_free(); + swiotlb_exit(); return 0; } diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index 4194bbb..da20569 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -33,14 +33,14 @@ static u64 __maybe_unused get_pfn_limit(struct device *dev) struct dev_archdata __maybe_unused *sd = &dev->archdata; #ifdef CONFIG_SWIOTLB - if (sd->max_direct_dma_addr && dev->dma_ops == &swiotlb_dma_ops) + if (sd->max_direct_dma_addr && dev->dma_ops == &powerpc_swiotlb_dma_ops) pfn = min_t(u64, pfn, sd->max_direct_dma_addr >> PAGE_SHIFT); #endif return pfn; } -static int dma_direct_dma_supported(struct device *dev, u64 mask) +static int dma_nommu_dma_supported(struct device *dev, u64 mask) { #ifdef CONFIG_PPC64 u64 limit = get_dma_offset(dev) + (memblock_end_of_DRAM() - 1); @@ -62,7 +62,7 @@ static int dma_direct_dma_supported(struct device *dev, u64 mask) #endif } -void *__dma_direct_alloc_coherent(struct device *dev, size_t size, +void *__dma_nommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { @@ -105,9 +105,6 @@ void *__dma_direct_alloc_coherent(struct device *dev, size_t size, }; #endif /* CONFIG_FSL_SOC */ - /* ignore region specifiers */ - flag &= ~(__GFP_HIGHMEM); - page = alloc_pages_node(node, flag, get_order(size)); if (page == NULL) return NULL; @@ -119,7 +116,7 @@ void *__dma_direct_alloc_coherent(struct device *dev, size_t size, #endif } -void __dma_direct_free_coherent(struct device *dev, size_t size, +void __dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { @@ -130,7 +127,7 @@ void __dma_direct_free_coherent(struct device *dev, size_t size, #endif } -static void *dma_direct_alloc_coherent(struct device *dev, size_t size, +static void *dma_nommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { @@ -139,8 +136,8 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size, /* The coherent mask may be smaller than the real mask, check if * we can really use the direct ops */ - if (dma_direct_dma_supported(dev, dev->coherent_dma_mask)) - return __dma_direct_alloc_coherent(dev, size, dma_handle, + if (dma_nommu_dma_supported(dev, dev->coherent_dma_mask)) + return __dma_nommu_alloc_coherent(dev, size, dma_handle, flag, attrs); /* Ok we can't ... do we have an iommu ? If not, fail */ @@ -154,15 +151,15 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size, dev_to_node(dev)); } -static void dma_direct_free_coherent(struct device *dev, size_t size, +static void dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { struct iommu_table *iommu; - /* See comments in dma_direct_alloc_coherent() */ - if (dma_direct_dma_supported(dev, dev->coherent_dma_mask)) - return __dma_direct_free_coherent(dev, size, vaddr, dma_handle, + /* See comments in dma_nommu_alloc_coherent() */ + if (dma_nommu_dma_supported(dev, dev->coherent_dma_mask)) + return __dma_nommu_free_coherent(dev, size, vaddr, dma_handle, attrs); /* Maybe we used an iommu ... */ iommu = get_iommu_table_base(dev); @@ -175,7 +172,7 @@ static void dma_direct_free_coherent(struct device *dev, size_t size, iommu_free_coherent(iommu, size, vaddr, dma_handle); } -int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, +int dma_nommu_mmap_coherent(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t handle, size_t size, unsigned long attrs) { @@ -193,7 +190,7 @@ int dma_direct_mmap_coherent(struct device *dev, struct vm_area_struct *vma, vma->vm_page_prot); } -static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, +static int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction, unsigned long attrs) { @@ -213,13 +210,13 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, return nents; } -static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg, +static void dma_nommu_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction, unsigned long attrs) { } -static u64 dma_direct_get_required_mask(struct device *dev) +static u64 dma_nommu_get_required_mask(struct device *dev) { u64 end, mask; @@ -231,7 +228,7 @@ static u64 dma_direct_get_required_mask(struct device *dev) return mask; } -static inline dma_addr_t dma_direct_map_page(struct device *dev, +static inline dma_addr_t dma_nommu_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, @@ -246,7 +243,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, return page_to_phys(page) + offset + get_dma_offset(dev); } -static inline void dma_direct_unmap_page(struct device *dev, +static inline void dma_nommu_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, enum dma_data_direction direction, @@ -255,7 +252,7 @@ static inline void dma_direct_unmap_page(struct device *dev, } #ifdef CONFIG_NOT_COHERENT_CACHE -static inline void dma_direct_sync_sg(struct device *dev, +static inline void dma_nommu_sync_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction direction) { @@ -266,7 +263,7 @@ static inline void dma_direct_sync_sg(struct device *dev, __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); } -static inline void dma_direct_sync_single(struct device *dev, +static inline void dma_nommu_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) { @@ -274,24 +271,24 @@ static inline void dma_direct_sync_single(struct device *dev, } #endif -const struct dma_map_ops dma_direct_ops = { - .alloc = dma_direct_alloc_coherent, - .free = dma_direct_free_coherent, - .mmap = dma_direct_mmap_coherent, - .map_sg = dma_direct_map_sg, - .unmap_sg = dma_direct_unmap_sg, - .dma_supported = dma_direct_dma_supported, - .map_page = dma_direct_map_page, - .unmap_page = dma_direct_unmap_page, - .get_required_mask = dma_direct_get_required_mask, +const struct dma_map_ops dma_nommu_ops = { + .alloc = dma_nommu_alloc_coherent, + .free = dma_nommu_free_coherent, + .mmap = dma_nommu_mmap_coherent, + .map_sg = dma_nommu_map_sg, + .unmap_sg = dma_nommu_unmap_sg, + .dma_supported = dma_nommu_dma_supported, + .map_page = dma_nommu_map_page, + .unmap_page = dma_nommu_unmap_page, + .get_required_mask = dma_nommu_get_required_mask, #ifdef CONFIG_NOT_COHERENT_CACHE - .sync_single_for_cpu = dma_direct_sync_single, - .sync_single_for_device = dma_direct_sync_single, - .sync_sg_for_cpu = dma_direct_sync_sg, - .sync_sg_for_device = dma_direct_sync_sg, + .sync_single_for_cpu = dma_nommu_sync_single, + .sync_single_for_device = dma_nommu_sync_single, + .sync_sg_for_cpu = dma_nommu_sync_sg, + .sync_sg_for_device = dma_nommu_sync_sg, #endif }; -EXPORT_SYMBOL(dma_direct_ops); +EXPORT_SYMBOL(dma_nommu_ops); int dma_set_coherent_mask(struct device *dev, u64 mask) { @@ -302,7 +299,7 @@ int dma_set_coherent_mask(struct device *dev, u64 mask) * is no dma_op->set_coherent_mask() so we have to do * things the hard way: */ - if (get_dma_ops(dev) != &dma_direct_ops || + if (get_dma_ops(dev) != &dma_nommu_ops || get_iommu_table_base(dev) == NULL || !dma_iommu_dma_supported(dev, mask)) return -EIO; diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 0ac7aa3..590f4d0a 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -60,7 +60,7 @@ resource_size_t isa_mem_base; EXPORT_SYMBOL(isa_mem_base); -static const struct dma_map_ops *pci_dma_ops = &dma_direct_ops; +static const struct dma_map_ops *pci_dma_ops = &dma_nommu_ops; void set_pci_dma_ops(const struct dma_map_ops *dma_ops) { diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 8fd3a70..3f33869 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -780,7 +780,7 @@ void arch_setup_pdev_archdata(struct platform_device *pdev) { pdev->archdata.dma_mask = DMA_BIT_MASK(32); pdev->dev.dma_mask = &pdev->archdata.dma_mask; - set_dma_ops(&pdev->dev, &dma_direct_ops); + set_dma_ops(&pdev->dev, &dma_nommu_ops); } static __init void print_system_info(void) diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 4b91ad0..12352a5 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -541,7 +541,7 @@ static struct cbe_iommu *cell_iommu_for_node(int nid) return NULL; } -static unsigned long cell_dma_direct_offset; +static unsigned long cell_dma_nommu_offset; static unsigned long dma_iommu_fixed_base; @@ -580,7 +580,7 @@ static void *dma_fixed_alloc_coherent(struct device *dev, size_t size, device_to_mask(dev), flag, dev_to_node(dev)); else - return dma_direct_ops.alloc(dev, size, dma_handle, flag, + return dma_nommu_ops.alloc(dev, size, dma_handle, flag, attrs); } @@ -592,7 +592,7 @@ static void dma_fixed_free_coherent(struct device *dev, size_t size, iommu_free_coherent(cell_get_iommu_table(dev), size, vaddr, dma_handle); else - dma_direct_ops.free(dev, size, vaddr, dma_handle, attrs); + dma_nommu_ops.free(dev, size, vaddr, dma_handle, attrs); } static dma_addr_t dma_fixed_map_page(struct device *dev, struct page *page, @@ -601,7 +601,7 @@ static dma_addr_t dma_fixed_map_page(struct device *dev, struct page *page, unsigned long attrs) { if (iommu_fixed_is_weak == (attrs & DMA_ATTR_WEAK_ORDERING)) - return dma_direct_ops.map_page(dev, page, offset, size, + return dma_nommu_ops.map_page(dev, page, offset, size, direction, attrs); else return iommu_map_page(dev, cell_get_iommu_table(dev), page, @@ -614,7 +614,7 @@ static void dma_fixed_unmap_page(struct device *dev, dma_addr_t dma_addr, unsigned long attrs) { if (iommu_fixed_is_weak == (attrs & DMA_ATTR_WEAK_ORDERING)) - dma_direct_ops.unmap_page(dev, dma_addr, size, direction, + dma_nommu_ops.unmap_page(dev, dma_addr, size, direction, attrs); else iommu_unmap_page(cell_get_iommu_table(dev), dma_addr, size, @@ -626,7 +626,7 @@ static int dma_fixed_map_sg(struct device *dev, struct scatterlist *sg, unsigned long attrs) { if (iommu_fixed_is_weak == (attrs & DMA_ATTR_WEAK_ORDERING)) - return dma_direct_ops.map_sg(dev, sg, nents, direction, attrs); + return dma_nommu_ops.map_sg(dev, sg, nents, direction, attrs); else return ppc_iommu_map_sg(dev, cell_get_iommu_table(dev), sg, nents, device_to_mask(dev), @@ -638,7 +638,7 @@ static void dma_fixed_unmap_sg(struct device *dev, struct scatterlist *sg, unsigned long attrs) { if (iommu_fixed_is_weak == (attrs & DMA_ATTR_WEAK_ORDERING)) - dma_direct_ops.unmap_sg(dev, sg, nents, direction, attrs); + dma_nommu_ops.unmap_sg(dev, sg, nents, direction, attrs); else ppc_iommu_unmap_sg(cell_get_iommu_table(dev), sg, nents, direction, attrs); @@ -661,8 +661,8 @@ static void cell_dma_dev_setup(struct device *dev) { if (get_pci_dma_ops() == &dma_iommu_ops) set_iommu_table_base(dev, cell_get_iommu_table(dev)); - else if (get_pci_dma_ops() == &dma_direct_ops) - set_dma_offset(dev, cell_dma_direct_offset); + else if (get_pci_dma_ops() == &dma_nommu_ops) + set_dma_offset(dev, cell_dma_nommu_offset); else BUG(); } @@ -810,14 +810,14 @@ static int __init cell_iommu_init_disabled(void) unsigned long base = 0, size; /* When no iommu is present, we use direct DMA ops */ - set_pci_dma_ops(&dma_direct_ops); + set_pci_dma_ops(&dma_nommu_ops); /* First make sure all IOC translation is turned off */ cell_disable_iommus(); /* If we have no Axon, we set up the spider DMA magic offset */ if (of_find_node_by_name(NULL, "axon") == NULL) - cell_dma_direct_offset = SPIDER_DMA_OFFSET; + cell_dma_nommu_offset = SPIDER_DMA_OFFSET; /* Now we need to check to see where the memory is mapped * in PCI space. We assume that all busses use the same dma @@ -851,13 +851,13 @@ static int __init cell_iommu_init_disabled(void) return -ENODEV; } - cell_dma_direct_offset += base; + cell_dma_nommu_offset += base; - if (cell_dma_direct_offset != 0) + if (cell_dma_nommu_offset != 0) cell_pci_controller_ops.dma_dev_setup = cell_pci_dma_dev_setup; printk("iommu: disabled, direct DMA offset is 0x%lx\n", - cell_dma_direct_offset); + cell_dma_nommu_offset); return 0; } diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c index 7fec04d..78b80cb 100644 --- a/arch/powerpc/platforms/pasemi/iommu.c +++ b/arch/powerpc/platforms/pasemi/iommu.c @@ -186,7 +186,7 @@ static void pci_dma_dev_setup_pasemi(struct pci_dev *dev) */ if (dev->vendor == 0x1959 && dev->device == 0xa007 && !firmware_has_feature(FW_FEATURE_LPAR)) { - dev->dev.dma_ops = &dma_direct_ops; + dev->dev.dma_ops = &dma_nommu_ops; /* * Set the coherent DMA mask to prevent the iommu * being used unnecessarily diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c index c4a3e93..d0b8ae5 100644 --- a/arch/powerpc/platforms/pasemi/setup.c +++ b/arch/powerpc/platforms/pasemi/setup.c @@ -363,7 +363,7 @@ static int pcmcia_notify(struct notifier_block *nb, unsigned long action, return 0; /* We use the direct ops for localbus */ - dev->dma_ops = &dma_direct_ops; + dev->dma_ops = &dma_nommu_ops; return 0; } diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 7490555..9582aeb 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1850,7 +1850,7 @@ static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) if (bypass) { dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); - set_dma_ops(&pdev->dev, &dma_direct_ops); + set_dma_ops(&pdev->dev, &dma_nommu_ops); } else { /* * If the device can't set the TCE bypass bit but still wants @@ -1868,7 +1868,7 @@ static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) return rc; /* 4GB offset bypasses 32-bit space */ set_dma_offset(&pdev->dev, (1ULL << 32)); - set_dma_ops(&pdev->dev, &dma_direct_ops); + set_dma_ops(&pdev->dev, &dma_nommu_ops); } else if (dma_mask >> 32 && dma_mask != DMA_BIT_MASK(64)) { /* * Fail the request if a DMA mask between 32 and 64 bits diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 69921f7..eaa1133 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -1231,7 +1231,7 @@ static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask) if (dma_offset != 0) { dev_info(dev, "Using 64-bit direct DMA at offset %llx\n", dma_offset); set_dma_offset(dev, dma_offset); - set_dma_ops(dev, &dma_direct_ops); + set_dma_ops(dev, &dma_nommu_ops); ddw_enabled = true; } } diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c index d869382..49e04ec 100644 --- a/arch/powerpc/platforms/pseries/vio.c +++ b/arch/powerpc/platforms/pseries/vio.c @@ -618,7 +618,7 @@ static u64 vio_dma_get_required_mask(struct device *dev) static const struct dma_map_ops vio_dma_mapping_ops = { .alloc = vio_dma_iommu_alloc_coherent, .free = vio_dma_iommu_free_coherent, - .mmap = dma_direct_mmap_coherent, + .mmap = dma_nommu_mmap_coherent, .map_sg = vio_dma_iommu_map_sg, .unmap_sg = vio_dma_iommu_unmap_sg, .map_page = vio_dma_iommu_map_page, diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 3573d54..a6198d4 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -402,7 +402,7 @@ static int dart_dma_set_mask(struct device *dev, u64 dma_mask) */ if (dart_device_on_pcie(dev) && dma_mask >= DMA_BIT_MASK(40)) { dev_info(dev, "Using 64-bit DMA iommu bypass\n"); - set_dma_ops(dev, &dma_direct_ops); + set_dma_ops(dev, &dma_nommu_ops); } else { dev_info(dev, "Using 32-bit DMA via iommu\n"); set_dma_ops(dev, &dma_iommu_ops); @@ -446,7 +446,7 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops) controller_ops->dma_bus_setup = NULL; /* Setup pci_dma ops */ - set_pci_dma_ops(&dma_direct_ops); + set_pci_dma_ops(&dma_nommu_ops); } #ifdef CONFIG_PM diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 22d9805..61e07c7 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -118,7 +118,7 @@ static void setup_swiotlb_ops(struct pci_controller *hose) { if (ppc_swiotlb_enable) { hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb; - set_pci_dma_ops(&swiotlb_dma_ops); + set_pci_dma_ops(&powerpc_swiotlb_dma_ops); } } #else @@ -135,7 +135,7 @@ static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask) * mapping that allows addressing any RAM address from across PCI. */ if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) { - set_dma_ops(dev, &dma_direct_ops); + set_dma_ops(dev, &dma_nommu_ops); set_dma_offset(dev, pci64_dma_offset); } diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 2c6adf1..865e14f 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -83,7 +83,7 @@ config PGTABLE_LEVELS config HAVE_KPROBES def_bool n -config DMA_NOOP_OPS +config DMA_DIRECT_OPS def_bool y menu "Platform type" diff --git a/arch/riscv/include/asm/Kbuild b/arch/riscv/include/asm/Kbuild index 970460a..197460c 100644 --- a/arch/riscv/include/asm/Kbuild +++ b/arch/riscv/include/asm/Kbuild @@ -7,6 +7,7 @@ generic-y += device.h generic-y += div64.h generic-y += dma.h generic-y += dma-contiguous.h +generic-y += dma-mapping.h generic-y += emergency-restart.h generic-y += errno.h generic-y += exec.h diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h deleted file mode 100644 index 3eec100..0000000 --- a/arch/riscv/include/asm/dma-mapping.h +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (C) 2003-2004 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * Copyright (C) 2012 ARM Ltd. - * Copyright (C) 2016 SiFive, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#ifndef __ASM_RISCV_DMA_MAPPING_H -#define __ASM_RISCV_DMA_MAPPING_H - -/* Use ops->dma_mapping_error (if it exists) or assume success */ -// #undef DMA_ERROR_CODE - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &dma_noop_ops; -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - - return addr + size - 1 <= *dev->dma_mask; -} - -#endif /* __ASM_RISCV_DMA_MAPPING_H */ diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 829c679..9376637 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -140,7 +140,7 @@ config S390 select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_CONTIGUOUS - select DMA_NOOP_OPS + select DMA_DIRECT_OPS select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_EFFICIENT_UNALIGNED_ACCESS diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild index 0484508..dade72b 100644 --- a/arch/s390/include/asm/Kbuild +++ b/arch/s390/include/asm/Kbuild @@ -4,6 +4,7 @@ generic-y += cacheflush.h generic-y += clkdev.h generic-y += device.h generic-y += dma-contiguous.h +generic-y += dma-mapping.h generic-y += div64.h generic-y += emergency-restart.h generic-y += export.h diff --git a/arch/s390/include/asm/dma-mapping.h b/arch/s390/include/asm/dma-mapping.h deleted file mode 100644 index eaf490f..0000000 --- a/arch/s390/include/asm/dma-mapping.h +++ /dev/null @@ -1,26 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_S390_DMA_MAPPING_H -#define _ASM_S390_DMA_MAPPING_H - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/scatterlist.h> -#include <linux/dma-debug.h> -#include <linux/io.h> - -extern const struct dma_map_ops s390_pci_dma_ops; - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &dma_noop_ops; -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - return addr + size - 1 <= *dev->dma_mask; -} - -#endif /* _ASM_S390_DMA_MAPPING_H */ diff --git a/arch/s390/include/asm/pci_dma.h b/arch/s390/include/asm/pci_dma.h index e8d9161..419fac7 100644 --- a/arch/s390/include/asm/pci_dma.h +++ b/arch/s390/include/asm/pci_dma.h @@ -201,4 +201,7 @@ void dma_cleanup_tables(unsigned long *); unsigned long *dma_walk_cpu_trans(unsigned long *rto, dma_addr_t dma_addr); void dma_update_cpu_trans(unsigned long *entry, void *page_addr, int flags); +extern const struct dma_map_ops s390_pci_dma_ops; + + #endif diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 02f269c..ef9d403 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -249,7 +249,7 @@ config HIGHMEM If unsure, say "true". -config ZONE_DMA +config ZONE_DMA32 def_bool y config IOMMU_HELPER @@ -261,6 +261,7 @@ config NEED_SG_DMA_LENGTH config SWIOTLB bool default TILEGX + select DMA_DIRECT_OPS select IOMMU_HELPER select NEED_SG_DMA_LENGTH select ARCH_HAS_DMA_SET_COHERENT_MASK diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h index 97ad628..d25fce1 100644 --- a/arch/tile/include/asm/dma-mapping.h +++ b/arch/tile/include/asm/dma-mapping.h @@ -44,26 +44,6 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off) dev->archdata.dma_offset = off; } -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr; -} - -static inline void dma_mark_clean(void *addr, size_t size) {} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return 0; - - return addr + size - 1 <= *dev->dma_mask; -} - #define HAVE_ARCH_DMA_SET_MASK 1 int dma_set_mask(struct device *dev, u64 mask); diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c index f2abedc..6a1efe5 100644 --- a/arch/tile/kernel/pci-dma.c +++ b/arch/tile/kernel/pci-dma.c @@ -54,7 +54,7 @@ static void *tile_dma_alloc_coherent(struct device *dev, size_t size, * which case we will return NULL. But such devices are uncommon. */ if (dma_mask <= DMA_BIT_MASK(32)) { - gfp |= GFP_DMA; + gfp |= GFP_DMA32; node = 0; } @@ -509,39 +509,9 @@ EXPORT_SYMBOL(gx_pci_dma_map_ops); /* PCI DMA mapping functions for legacy PCI devices */ #ifdef CONFIG_SWIOTLB -static void *tile_swiotlb_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - gfp |= GFP_DMA; - return swiotlb_alloc_coherent(dev, size, dma_handle, gfp); -} - -static void tile_swiotlb_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_addr, - unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_addr); -} - -static const struct dma_map_ops pci_swiotlb_dma_ops = { - .alloc = tile_swiotlb_alloc_coherent, - .free = tile_swiotlb_free_coherent, - .map_page = swiotlb_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = swiotlb_map_sg_attrs, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = swiotlb_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = swiotlb_sync_sg_for_device, - .dma_supported = swiotlb_dma_supported, - .mapping_error = swiotlb_dma_mapping_error, -}; - static const struct dma_map_ops pci_hybrid_dma_ops = { - .alloc = tile_swiotlb_alloc_coherent, - .free = tile_swiotlb_free_coherent, + .alloc = swiotlb_alloc, + .free = swiotlb_free, .map_page = tile_pci_dma_map_page, .unmap_page = tile_pci_dma_unmap_page, .map_sg = tile_pci_dma_map_sg, @@ -552,7 +522,7 @@ static const struct dma_map_ops pci_hybrid_dma_ops = { .sync_sg_for_device = tile_pci_dma_sync_sg_for_device, }; -const struct dma_map_ops *gx_legacy_pci_dma_map_ops = &pci_swiotlb_dma_ops; +const struct dma_map_ops *gx_legacy_pci_dma_map_ops = &swiotlb_dma_ops; const struct dma_map_ops *gx_hybrid_pci_dma_map_ops = &pci_hybrid_dma_ops; #else const struct dma_map_ops *gx_legacy_pci_dma_map_ops; diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c index ad83c1e..eb4e198 100644 --- a/arch/tile/kernel/setup.c +++ b/arch/tile/kernel/setup.c @@ -814,11 +814,11 @@ static void __init zone_sizes_init(void) #endif if (start < dma_end) { - zones_size[ZONE_DMA] = min(zones_size[ZONE_NORMAL], + zones_size[ZONE_DMA32] = min(zones_size[ZONE_NORMAL], dma_end - start); - zones_size[ZONE_NORMAL] -= zones_size[ZONE_DMA]; + zones_size[ZONE_NORMAL] -= zones_size[ZONE_DMA32]; } else { - zones_size[ZONE_DMA] = 0; + zones_size[ZONE_DMA32] = 0; } /* Take zone metadata from controller 0 if we're isolnode. */ @@ -830,7 +830,7 @@ static void __init zone_sizes_init(void) PFN_UP(node_percpu[i])); /* Track the type of memory on each node */ - if (zones_size[ZONE_NORMAL] || zones_size[ZONE_DMA]) + if (zones_size[ZONE_NORMAL] || zones_size[ZONE_DMA32]) node_set_state(i, N_NORMAL_MEMORY); #ifdef CONFIG_HIGHMEM if (end != start) diff --git a/arch/unicore32/include/asm/dma-mapping.h b/arch/unicore32/include/asm/dma-mapping.h index ac608c2..790bc2e 100644 --- a/arch/unicore32/include/asm/dma-mapping.h +++ b/arch/unicore32/include/asm/dma-mapping.h @@ -12,38 +12,11 @@ #ifndef __UNICORE_DMA_MAPPING_H__ #define __UNICORE_DMA_MAPPING_H__ -#ifdef __KERNEL__ - -#include <linux/mm_types.h> -#include <linux/scatterlist.h> #include <linux/swiotlb.h> -extern const struct dma_map_ops swiotlb_dma_map_ops; - static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { - return &swiotlb_dma_map_ops; + return &swiotlb_dma_ops; } -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (dev && dev->dma_mask) - return addr + size - 1 <= *dev->dma_mask; - - return 1; -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr; -} - -static inline void dma_mark_clean(void *addr, size_t size) {} - -#endif /* __KERNEL__ */ #endif diff --git a/arch/unicore32/mm/Kconfig b/arch/unicore32/mm/Kconfig index c256460..e9154a5 100644 --- a/arch/unicore32/mm/Kconfig +++ b/arch/unicore32/mm/Kconfig @@ -42,6 +42,7 @@ config CPU_TLB_SINGLE_ENTRY_DISABLE config SWIOTLB def_bool y + select DMA_DIRECT_OPS config IOMMU_HELPER def_bool SWIOTLB diff --git a/arch/unicore32/mm/Makefile b/arch/unicore32/mm/Makefile index 681c0ef..8106260 100644 --- a/arch/unicore32/mm/Makefile +++ b/arch/unicore32/mm/Makefile @@ -6,8 +6,6 @@ obj-y := extable.o fault.o init.o pgd.o mmu.o obj-y += flush.o ioremap.o -obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o - obj-$(CONFIG_MODULES) += proc-syms.o obj-$(CONFIG_ALIGNMENT_TRAP) += alignment.o diff --git a/arch/unicore32/mm/dma-swiotlb.c b/arch/unicore32/mm/dma-swiotlb.c deleted file mode 100644 index 525413d..0000000 --- a/arch/unicore32/mm/dma-swiotlb.c +++ /dev/null @@ -1,48 +0,0 @@ -/* - * Contains routines needed to support swiotlb for UniCore32. - * - * Copyright (C) 2010 Guan Xuetao - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <linux/pci.h> -#include <linux/cache.h> -#include <linux/module.h> -#include <linux/dma-mapping.h> -#include <linux/swiotlb.h> -#include <linux/bootmem.h> - -#include <asm/dma.h> - -static void *unicore_swiotlb_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flags, - unsigned long attrs) -{ - return swiotlb_alloc_coherent(dev, size, dma_handle, flags); -} - -static void unicore_swiotlb_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_addr, - unsigned long attrs) -{ - swiotlb_free_coherent(dev, size, vaddr, dma_addr); -} - -const struct dma_map_ops swiotlb_dma_map_ops = { - .alloc = unicore_swiotlb_alloc_coherent, - .free = unicore_swiotlb_free_coherent, - .map_sg = swiotlb_map_sg_attrs, - .unmap_sg = swiotlb_unmap_sg_attrs, - .dma_supported = swiotlb_dma_supported, - .map_page = swiotlb_map_page, - .unmap_page = swiotlb_unmap_page, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = swiotlb_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = swiotlb_sync_sg_for_device, - .mapping_error = swiotlb_dma_mapping_error, -}; -EXPORT_SYMBOL(swiotlb_dma_map_ops); diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 423e4b6..dbe5542 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -54,6 +54,7 @@ config X86 select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_KCOV if X86_64 + select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PMEM_API if X86_64 select ARCH_HAS_REFCOUNT select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 diff --git a/arch/x86/include/asm/dma-direct.h b/arch/x86/include/asm/dma-direct.h new file mode 100644 index 0000000..1295bc6 --- /dev/null +++ b/arch/x86/include/asm/dma-direct.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef ASM_X86_DMA_DIRECT_H +#define ASM_X86_DMA_DIRECT_H 1 + +#include <linux/mem_encrypt.h> + +#ifdef CONFIG_X86_DMA_REMAP /* Platform code defines bridge-specific code */ +bool dma_capable(struct device *dev, dma_addr_t addr, size_t size); +dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); +phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); +#else +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return 0; + + return addr + size - 1 <= *dev->dma_mask; +} + +static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + return __sme_set(paddr); +} + +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) +{ + return __sme_clr(daddr); +} +#endif /* CONFIG_X86_DMA_REMAP */ +#endif /* ASM_X86_DMA_DIRECT_H */ diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 0350d99..6277c83 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -12,7 +12,6 @@ #include <asm/io.h> #include <asm/swiotlb.h> #include <linux/dma-contiguous.h> -#include <linux/mem_encrypt.h> #ifdef CONFIG_ISA # define ISA_DMA_BIT_MASK DMA_BIT_MASK(24) @@ -31,6 +30,9 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return dma_ops; } +int arch_dma_supported(struct device *dev, u64 mask); +#define arch_dma_supported arch_dma_supported + bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp); #define arch_dma_alloc_attrs arch_dma_alloc_attrs @@ -42,31 +44,6 @@ extern void dma_generic_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_addr, unsigned long attrs); -#ifdef CONFIG_X86_DMA_REMAP /* Platform code defines bridge-specific code */ -extern bool dma_capable(struct device *dev, dma_addr_t addr, size_t size); -extern dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); -extern phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); -#else - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return 0; - - return addr + size - 1 <= *dev->dma_mask; -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return __sme_set(paddr); -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return __sme_clr(daddr); -} -#endif /* CONFIG_X86_DMA_REMAP */ - static inline unsigned long dma_alloc_coherent_mask(struct device *dev, gfp_t gfp) { diff --git a/arch/x86/include/asm/swiotlb.h b/arch/x86/include/asm/swiotlb.h index bdf9aed..1c6a6cb 100644 --- a/arch/x86/include/asm/swiotlb.h +++ b/arch/x86/include/asm/swiotlb.h @@ -28,8 +28,6 @@ static inline void pci_swiotlb_late_init(void) } #endif -static inline void dma_mark_clean(void *addr, size_t size) {} - extern void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs); diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c index cc0e8bc..ecd486c 100644 --- a/arch/x86/kernel/amd_gart_64.c +++ b/arch/x86/kernel/amd_gart_64.c @@ -31,6 +31,7 @@ #include <linux/io.h> #include <linux/gfp.h> #include <linux/atomic.h> +#include <linux/dma-direct.h> #include <asm/mtrr.h> #include <asm/pgtable.h> #include <asm/proto.h> diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 599d746..df7ab02 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/dma-debug.h> #include <linux/dmar.h> #include <linux/export.h> @@ -87,7 +87,6 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, dma_mask = dma_alloc_coherent_mask(dev, flag); - flag &= ~__GFP_ZERO; again: page = NULL; /* CMA can be used only in the context which permits sleeping */ @@ -139,7 +138,6 @@ bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp) if (!*dev) *dev = &x86_dma_fallback_dev; - *gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); *gfp = dma_alloc_coherent_gfp_flags(*dev, *gfp); if (!is_device_dma_capable(*dev)) @@ -217,7 +215,7 @@ static __init int iommu_setup(char *p) } early_param("iommu", iommu_setup); -int x86_dma_supported(struct device *dev, u64 mask) +int arch_dma_supported(struct device *dev, u64 mask) { #ifdef CONFIG_PCI if (mask > 0xffffffff && forbid_dac > 0) { @@ -226,12 +224,6 @@ int x86_dma_supported(struct device *dev, u64 mask) } #endif - /* 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. */ - if (mask < DMA_BIT_MASK(24)) - return 0; - /* Tell the device to use SAC when IOMMU force is on. This allows the driver to use cheaper accesses in some cases. @@ -251,6 +243,17 @@ int x86_dma_supported(struct device *dev, u64 mask) return 1; } +EXPORT_SYMBOL(arch_dma_supported); + +int x86_dma_supported(struct device *dev, u64 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. */ + if (mask < DMA_BIT_MASK(24)) + return 0; + return 1; +} static int __init pci_iommu_init(void) { diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index b0caae2..618285e 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* Fallback functions when the main IOMMU code is not compiled in. This code is roughly equivalent to i386. */ -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/scatterlist.h> #include <linux/string.h> #include <linux/gfp.h> diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c index 53bd05e..0ee0f8f3 100644 --- a/arch/x86/kernel/pci-swiotlb.c +++ b/arch/x86/kernel/pci-swiotlb.c @@ -6,7 +6,7 @@ #include <linux/init.h> #include <linux/swiotlb.h> #include <linux/bootmem.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/mem_encrypt.h> #include <asm/iommu.h> @@ -48,7 +48,7 @@ void x86_swiotlb_free_coherent(struct device *dev, size_t size, dma_generic_free_coherent(dev, size, vaddr, dma_addr, attrs); } -static const struct dma_map_ops swiotlb_dma_ops = { +static const struct dma_map_ops x86_swiotlb_dma_ops = { .mapping_error = swiotlb_dma_mapping_error, .alloc = x86_swiotlb_alloc_coherent, .free = x86_swiotlb_free_coherent, @@ -112,7 +112,7 @@ void __init pci_swiotlb_init(void) { if (swiotlb) { swiotlb_init(0); - dma_ops = &swiotlb_dma_ops; + dma_ops = &x86_swiotlb_dma_ops; } } @@ -120,7 +120,7 @@ void __init pci_swiotlb_late_init(void) { /* An IOMMU turned us off. */ if (!swiotlb) - swiotlb_free(); + swiotlb_exit(); else { printk(KERN_INFO "PCI-DMA: " "Using software bounce buffering for IO (SWIOTLB)\n"); diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index e1d61e8..1a53071 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -15,7 +15,7 @@ #include <linux/linkage.h> #include <linux/init.h> #include <linux/mm.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/swiotlb.h> #include <linux/mem_encrypt.h> diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c index 53d6002..75577c1 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 <linux/dma-direct.h> #include <asm/iommu.h> #define STA2X11_SWIOTLB_SIZE (4*1024*1024) diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h index 153bf23..4409880 100644 --- a/arch/xtensa/include/asm/dma-mapping.h +++ b/arch/xtensa/include/asm/dma-mapping.h @@ -23,14 +23,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return &xtensa_dma_map_ops; } -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return (dma_addr_t)paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return (phys_addr_t)daddr; -} - #endif /* _XTENSA_DMA_MAPPING_H */ diff --git a/drivers/crypto/marvell/cesa.c b/drivers/crypto/marvell/cesa.c index 2938324..3a0c400 100644 --- a/drivers/crypto/marvell/cesa.c +++ b/drivers/crypto/marvell/cesa.c @@ -24,6 +24,7 @@ #include <linux/scatterlist.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/dma-direct.h> /* XXX: drivers shall never use this directly! */ #include <linux/clk.h> #include <linux/of.h> #include <linux/of_platform.h> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 4a2de34..a1373cf 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4808,7 +4808,7 @@ int __init intel_iommu_init(void) up_write(&dmar_global_lock); pr_info("Intel(R) Virtualization Technology for Directed I/O\n"); -#ifdef CONFIG_SWIOTLB +#if defined(CONFIG_X86) && defined(CONFIG_SWIOTLB) swiotlb = 0; #endif dma_ops = &intel_dma_ops; diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c index 512a489..7fd0bdc 100644 --- a/drivers/misc/cxl/vphb.c +++ b/drivers/misc/cxl/vphb.c @@ -54,7 +54,7 @@ static bool cxl_pci_enable_device_hook(struct pci_dev *dev) return false; } - set_dma_ops(&dev->dev, &dma_direct_ops); + set_dma_ops(&dev->dev, &dma_nommu_ops); set_dma_offset(&dev->dev, PAGE_OFFSET); return _cxl_pci_associate_default_context(dev, afu); diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c index 6be5558..563b759 100644 --- a/drivers/mtd/nand/qcom_nandc.c +++ b/drivers/mtd/nand/qcom_nandc.c @@ -23,6 +23,7 @@ #include <linux/of_device.h> #include <linux/delay.h> #include <linux/dma/qcom_bam_dma.h> +#include <linux/dma-direct.h> /* XXX: drivers shall never use this directly! */ /* NANDc reg offsets */ #define NAND_FLASH_CMD 0x00 diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 82fc54f..5bb72d3 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -36,7 +36,7 @@ #define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt #include <linux/bootmem.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/export.h> #include <xen/swiotlb-xen.h> #include <xen/page.h> diff --git a/include/asm-generic/dma-mapping.h b/include/asm-generic/dma-mapping.h new file mode 100644 index 0000000..880a292 --- /dev/null +++ b/include/asm-generic/dma-mapping.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_GENERIC_DMA_MAPPING_H +#define _ASM_GENERIC_DMA_MAPPING_H + +static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) +{ + return &dma_direct_ops; +} + +#endif /* _ASM_GENERIC_DMA_MAPPING_H */ diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h new file mode 100644 index 0000000..bcdb1a3 --- /dev/null +++ b/include/linux/dma-direct.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_DMA_DIRECT_H +#define _LINUX_DMA_DIRECT_H 1 + +#include <linux/dma-mapping.h> + +#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA +#include <asm/dma-direct.h> +#else +static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + dma_addr_t dev_addr = (dma_addr_t)paddr; + + return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); +} + +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) +{ + phys_addr_t paddr = (phys_addr_t)dev_addr; + + return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); +} + +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return false; + + return addr + size - 1 <= *dev->dma_mask; +} +#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */ + +#ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN +void dma_mark_clean(void *addr, size_t size); +#else +static inline void dma_mark_clean(void *addr, size_t size) +{ +} +#endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */ + +void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t gfp, unsigned long attrs); +void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_addr, unsigned long attrs); +int dma_direct_supported(struct device *dev, u64 mask); + +#endif /* _LINUX_DMA_DIRECT_H */ diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 81ed9b2..34fe846 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -136,7 +136,7 @@ struct dma_map_ops { int is_phys; }; -extern const struct dma_map_ops dma_noop_ops; +extern const struct dma_map_ops dma_direct_ops; extern const struct dma_map_ops dma_virt_ops; #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) @@ -513,10 +513,18 @@ static inline void *dma_alloc_attrs(struct device *dev, size_t size, void *cpu_addr; BUG_ON(!ops); + WARN_ON_ONCE(dev && !dev->coherent_dma_mask); if (dma_alloc_from_dev_coherent(dev, size, dma_handle, &cpu_addr)) return cpu_addr; + /* + * Let the implementation decide on the zone to allocate from, and + * decide on the way of zeroing the memory given that the memory + * returned should always be zeroed. + */ + flag &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM | __GFP_ZERO); + if (!arch_dma_alloc_attrs(&dev, &flag)) return NULL; if (!ops->alloc) @@ -568,6 +576,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) return 0; } +/* + * This is a hack for the legacy x86 forbid_dac and iommu_sac_force. Please + * don't use this is new code. + */ +#ifndef arch_dma_supported +#define arch_dma_supported(dev, mask) (1) +#endif + static inline void dma_check_mask(struct device *dev, u64 mask) { if (sme_active() && (mask < (((u64)sme_get_me_mask() << 1) - 1))) @@ -580,6 +596,9 @@ static inline int dma_supported(struct device *dev, u64 mask) if (!ops) return 0; + if (!arch_dma_supported(dev, mask)) + return 0; + if (!ops->dma_supported) return 1; return ops->dma_supported(dev, mask); @@ -692,7 +711,7 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask) #ifndef dma_max_pfn static inline unsigned long dma_max_pfn(struct device *dev) { - return *dev->dma_mask >> PAGE_SHIFT; + return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset; } #endif diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 24ed817..5b1f2a0 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -66,6 +66,12 @@ extern void swiotlb_tbl_sync_single(struct device *hwdev, enum dma_sync_target target); /* Accessory functions. */ + +void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, + gfp_t flags, unsigned long attrs); +void swiotlb_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_addr, unsigned long attrs); + extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags); @@ -115,10 +121,10 @@ extern int swiotlb_dma_supported(struct device *hwdev, u64 mask); #ifdef CONFIG_SWIOTLB -extern void __init swiotlb_free(void); +extern void __init swiotlb_exit(void); unsigned int swiotlb_max_segment(void); #else -static inline void swiotlb_free(void) { } +static inline void swiotlb_exit(void) { } static inline unsigned int swiotlb_max_segment(void) { return 0; } #endif @@ -126,4 +132,6 @@ extern void swiotlb_print_info(void); extern int is_swiotlb_buffer(phys_addr_t paddr); extern void swiotlb_set_max_segment(unsigned int); +extern const struct dma_map_ops swiotlb_dma_ops; + #endif /* __LINUX_SWIOTLB_H */ diff --git a/lib/Kconfig b/lib/Kconfig index 4dd5c11..e960894 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -413,7 +413,7 @@ config SGL_ALLOC bool default n -config DMA_NOOP_OPS +config DMA_DIRECT_OPS bool depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) default n diff --git a/lib/Makefile b/lib/Makefile index d11c48e..749851a 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -28,7 +28,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \ lib-$(CONFIG_MMU) += ioremap.o lib-$(CONFIG_SMP) += cpumask.o -lib-$(CONFIG_DMA_NOOP_OPS) += dma-noop.o +lib-$(CONFIG_DMA_DIRECT_OPS) += dma-direct.o lib-$(CONFIG_DMA_VIRT_OPS) += dma-virt.o lib-y += kobject.o klist.o diff --git a/lib/dma-direct.c b/lib/dma-direct.c new file mode 100644 index 0000000..40b1f92 --- /dev/null +++ b/lib/dma-direct.c @@ -0,0 +1,156 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DMA operations that map physical memory directly without using an IOMMU or + * flushing caches. + */ +#include <linux/export.h> +#include <linux/mm.h> +#include <linux/dma-direct.h> +#include <linux/scatterlist.h> +#include <linux/dma-contiguous.h> +#include <linux/pfn.h> + +#define DIRECT_MAPPING_ERROR 0 + +/* + * Most architectures use ZONE_DMA for the first 16 Megabytes, but + * some use it for entirely different regions: + */ +#ifndef ARCH_ZONE_DMA_BITS +#define ARCH_ZONE_DMA_BITS 24 +#endif + +static bool +check_addr(struct device *dev, dma_addr_t dma_addr, size_t size, + const char *caller) +{ + if (unlikely(dev && !dma_capable(dev, dma_addr, size))) { + if (*dev->dma_mask >= DMA_BIT_MASK(32)) { + dev_err(dev, + "%s: overflow %pad+%zu of device mask %llx\n", + caller, &dma_addr, size, *dev->dma_mask); + } + return false; + } + return true; +} + +static bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size) +{ + return phys_to_dma(dev, phys) + size - 1 <= dev->coherent_dma_mask; +} + +void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t gfp, unsigned long attrs) +{ + unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; + int page_order = get_order(size); + struct page *page = NULL; + + /* GFP_DMA32 and GFP_DMA are no ops without the corresponding zones: */ + if (dev->coherent_dma_mask <= DMA_BIT_MASK(ARCH_ZONE_DMA_BITS)) + gfp |= GFP_DMA; + if (dev->coherent_dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) + gfp |= GFP_DMA32; + +again: + /* CMA can be used only in the context which permits sleeping */ + if (gfpflags_allow_blocking(gfp)) { + page = dma_alloc_from_contiguous(dev, count, page_order, gfp); + if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { + dma_release_from_contiguous(dev, page, count); + page = NULL; + } + } + if (!page) + page = alloc_pages_node(dev_to_node(dev), gfp, page_order); + + if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { + __free_pages(page, page_order); + page = NULL; + + if (dev->coherent_dma_mask < DMA_BIT_MASK(32) && + !(gfp & GFP_DMA)) { + gfp = (gfp & ~GFP_DMA32) | GFP_DMA; + goto again; + } + } + + if (!page) + return NULL; + + *dma_handle = phys_to_dma(dev, page_to_phys(page)); + memset(page_address(page), 0, size); + return page_address(page); +} + +void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_addr, unsigned long attrs) +{ + unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; + + if (!dma_release_from_contiguous(dev, virt_to_page(cpu_addr), count)) + free_pages((unsigned long)cpu_addr, get_order(size)); +} + +static dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, enum dma_data_direction dir, + unsigned long attrs) +{ + dma_addr_t dma_addr = phys_to_dma(dev, page_to_phys(page)) + offset; + + if (!check_addr(dev, dma_addr, size, __func__)) + return DIRECT_MAPPING_ERROR; + return dma_addr; +} + +static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction dir, unsigned long attrs) +{ + int i; + struct scatterlist *sg; + + for_each_sg(sgl, sg, nents, i) { + BUG_ON(!sg_page(sg)); + + sg_dma_address(sg) = phys_to_dma(dev, sg_phys(sg)); + if (!check_addr(dev, sg_dma_address(sg), sg->length, __func__)) + return 0; + sg_dma_len(sg) = sg->length; + } + + return nents; +} + +int dma_direct_supported(struct device *dev, u64 mask) +{ +#ifdef CONFIG_ZONE_DMA + if (mask < DMA_BIT_MASK(ARCH_ZONE_DMA_BITS)) + return 0; +#else + /* + * Because 32-bit DMA masks are so common we expect every architecture + * to be able to satisfy them - either by not supporting more physical + * memory, or by providing a ZONE_DMA32. If neither is the case, the + * architecture needs to use an IOMMU instead of the direct mapping. + */ + if (mask < DMA_BIT_MASK(32)) + return 0; +#endif + return 1; +} + +static int dma_direct_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == DIRECT_MAPPING_ERROR; +} + +const struct dma_map_ops dma_direct_ops = { + .alloc = dma_direct_alloc, + .free = dma_direct_free, + .map_page = dma_direct_map_page, + .map_sg = dma_direct_map_sg, + .dma_supported = dma_direct_supported, + .mapping_error = dma_direct_mapping_error, +}; +EXPORT_SYMBOL(dma_direct_ops); diff --git a/lib/dma-noop.c b/lib/dma-noop.c deleted file mode 100644 index a10185b..0000000 --- a/lib/dma-noop.c +++ /dev/null @@ -1,68 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * lib/dma-noop.c - * - * DMA operations that map to physical addresses without flushing memory. - */ -#include <linux/export.h> -#include <linux/mm.h> -#include <linux/dma-mapping.h> -#include <linux/scatterlist.h> -#include <linux/pfn.h> - -static void *dma_noop_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - void *ret; - - ret = (void *)__get_free_pages(gfp, get_order(size)); - if (ret) - *dma_handle = virt_to_phys(ret) - PFN_PHYS(dev->dma_pfn_offset); - - return ret; -} - -static void dma_noop_free(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_addr, - unsigned long attrs) -{ - free_pages((unsigned long)cpu_addr, get_order(size)); -} - -static dma_addr_t dma_noop_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - unsigned long attrs) -{ - return page_to_phys(page) + offset - PFN_PHYS(dev->dma_pfn_offset); -} - -static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents, - enum dma_data_direction dir, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sgl, sg, nents, i) { - dma_addr_t offset = PFN_PHYS(dev->dma_pfn_offset); - void *va; - - BUG_ON(!sg_page(sg)); - va = sg_virt(sg); - sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va) - offset; - sg_dma_len(sg) = sg->length; - } - - return nents; -} - -const struct dma_map_ops dma_noop_ops = { - .alloc = dma_noop_alloc, - .free = dma_noop_free, - .map_page = dma_noop_map_page, - .map_sg = dma_noop_map_sg, -}; - -EXPORT_SYMBOL(dma_noop_ops); diff --git a/lib/swiotlb.c b/lib/swiotlb.c index cea19aa..c43ec22 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -18,7 +18,7 @@ */ #include <linux/cache.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/mm.h> #include <linux/export.h> #include <linux/spinlock.h> @@ -417,7 +417,7 @@ cleanup2: return -ENOMEM; } -void __init swiotlb_free(void) +void __init swiotlb_exit(void) { if (!io_tlb_orig_addr) return; @@ -586,7 +586,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, not_found: spin_unlock_irqrestore(&io_tlb_lock, flags); - if (printk_ratelimit()) + if (!(attrs & DMA_ATTR_NO_WARN) && printk_ratelimit()) dev_warn(hwdev, "swiotlb buffer is full (sz: %zd bytes)\n", size); return SWIOTLB_MAP_ERROR; found: @@ -605,7 +605,6 @@ found: return tlb_addr; } -EXPORT_SYMBOL_GPL(swiotlb_tbl_map_single); /* * Allocates bounce buffer and returns its kernel virtual address. @@ -675,7 +674,6 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, } spin_unlock_irqrestore(&io_tlb_lock, flags); } -EXPORT_SYMBOL_GPL(swiotlb_tbl_unmap_single); void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir, @@ -707,92 +705,107 @@ void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr, BUG(); } } -EXPORT_SYMBOL_GPL(swiotlb_tbl_sync_single); + +static inline bool dma_coherent_ok(struct device *dev, dma_addr_t addr, + size_t size) +{ + u64 mask = DMA_BIT_MASK(32); + + if (dev && dev->coherent_dma_mask) + mask = dev->coherent_dma_mask; + return addr + size - 1 <= mask; +} + +static void * +swiotlb_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle, + unsigned long attrs) +{ + phys_addr_t phys_addr; + + if (swiotlb_force == SWIOTLB_NO_FORCE) + goto out_warn; + + phys_addr = swiotlb_tbl_map_single(dev, + swiotlb_phys_to_dma(dev, io_tlb_start), + 0, size, DMA_FROM_DEVICE, 0); + if (phys_addr == SWIOTLB_MAP_ERROR) + goto out_warn; + + *dma_handle = swiotlb_phys_to_dma(dev, phys_addr); + if (dma_coherent_ok(dev, *dma_handle, size)) + goto out_unmap; + + memset(phys_to_virt(phys_addr), 0, size); + return phys_to_virt(phys_addr); + +out_unmap: + dev_warn(dev, "hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n", + (unsigned long long)(dev ? dev->coherent_dma_mask : 0), + (unsigned long long)*dma_handle); + + /* + * DMA_TO_DEVICE to avoid memcpy in unmap_single. + * DMA_ATTR_SKIP_CPU_SYNC is optional. + */ + swiotlb_tbl_unmap_single(dev, phys_addr, size, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); +out_warn: + if ((attrs & DMA_ATTR_NO_WARN) && printk_ratelimit()) { + dev_warn(dev, + "swiotlb: coherent allocation failed, size=%zu\n", + size); + dump_stack(); + } + return NULL; +} void * swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags) { - dma_addr_t dev_addr; - void *ret; int order = get_order(size); - u64 dma_mask = DMA_BIT_MASK(32); - - if (hwdev && hwdev->coherent_dma_mask) - dma_mask = hwdev->coherent_dma_mask; + unsigned long attrs = (flags & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0; + void *ret; ret = (void *)__get_free_pages(flags, order); if (ret) { - dev_addr = swiotlb_virt_to_bus(hwdev, ret); - if (dev_addr + size - 1 > dma_mask) { - /* - * The allocated memory isn't reachable by the device. - */ - free_pages((unsigned long) ret, order); - ret = NULL; + *dma_handle = swiotlb_virt_to_bus(hwdev, ret); + if (dma_coherent_ok(hwdev, *dma_handle, size)) { + memset(ret, 0, size); + return ret; } + free_pages((unsigned long)ret, order); } - if (!ret) { - /* - * We are either out of memory or the device can't DMA to - * GFP_DMA memory; fall back on map_single(), which - * will grab memory from the lowest available address range. - */ - phys_addr_t paddr = map_single(hwdev, 0, size, - DMA_FROM_DEVICE, 0); - if (paddr == SWIOTLB_MAP_ERROR) - goto err_warn; - ret = phys_to_virt(paddr); - dev_addr = swiotlb_phys_to_dma(hwdev, paddr); - - /* Confirm address can be DMA'd by device */ - if (dev_addr + size - 1 > dma_mask) { - printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n", - (unsigned long long)dma_mask, - (unsigned long long)dev_addr); - - /* - * DMA_TO_DEVICE to avoid memcpy in unmap_single. - * The DMA_ATTR_SKIP_CPU_SYNC is optional. - */ - swiotlb_tbl_unmap_single(hwdev, paddr, - size, DMA_TO_DEVICE, - DMA_ATTR_SKIP_CPU_SYNC); - goto err_warn; - } - } + return swiotlb_alloc_buffer(hwdev, size, dma_handle, attrs); +} +EXPORT_SYMBOL(swiotlb_alloc_coherent); - *dma_handle = dev_addr; - memset(ret, 0, size); +static bool swiotlb_free_buffer(struct device *dev, size_t size, + dma_addr_t dma_addr) +{ + phys_addr_t phys_addr = dma_to_phys(dev, dma_addr); - return ret; + WARN_ON_ONCE(irqs_disabled()); -err_warn: - pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n", - dev_name(hwdev), size); - dump_stack(); + if (!is_swiotlb_buffer(phys_addr)) + return false; - return NULL; + /* + * DMA_TO_DEVICE to avoid memcpy in swiotlb_tbl_unmap_single. + * DMA_ATTR_SKIP_CPU_SYNC is optional. + */ + swiotlb_tbl_unmap_single(dev, phys_addr, size, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + return true; } -EXPORT_SYMBOL(swiotlb_alloc_coherent); void swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, dma_addr_t dev_addr) { - phys_addr_t paddr = dma_to_phys(hwdev, dev_addr); - - WARN_ON(irqs_disabled()); - if (!is_swiotlb_buffer(paddr)) + if (!swiotlb_free_buffer(hwdev, size, dev_addr)) free_pages((unsigned long)vaddr, get_order(size)); - else - /* - * DMA_TO_DEVICE to avoid memcpy in swiotlb_tbl_unmap_single. - * DMA_ATTR_SKIP_CPU_SYNC is optional. - */ - swiotlb_tbl_unmap_single(hwdev, paddr, size, DMA_TO_DEVICE, - DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL(swiotlb_free_coherent); @@ -868,7 +881,6 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, return swiotlb_phys_to_dma(dev, io_tlb_overflow_buffer); } -EXPORT_SYMBOL_GPL(swiotlb_map_page); /* * Unmap a single streaming mode DMA translation. The dma_addr and size must @@ -909,7 +921,6 @@ void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, { unmap_single(hwdev, dev_addr, size, dir, attrs); } -EXPORT_SYMBOL_GPL(swiotlb_unmap_page); /* * Make physical memory consistent for a single streaming mode DMA translation @@ -947,7 +958,6 @@ swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, { swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU); } -EXPORT_SYMBOL(swiotlb_sync_single_for_cpu); void swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, @@ -955,7 +965,6 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, { swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE); } -EXPORT_SYMBOL(swiotlb_sync_single_for_device); /* * Map a set of buffers described by scatterlist in streaming mode for DMA. @@ -1007,7 +1016,6 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, } return nelems; } -EXPORT_SYMBOL(swiotlb_map_sg_attrs); /* * Unmap a set of streaming mode DMA translations. Again, cpu read rules @@ -1027,7 +1035,6 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir, attrs); } -EXPORT_SYMBOL(swiotlb_unmap_sg_attrs); /* * Make physical memory consistent for a set of streaming mode DMA translations @@ -1055,7 +1062,6 @@ swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, { swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU); } -EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu); void swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, @@ -1063,14 +1069,12 @@ swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, { swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE); } -EXPORT_SYMBOL(swiotlb_sync_sg_for_device); int swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr) { return (dma_addr == swiotlb_phys_to_dma(hwdev, io_tlb_overflow_buffer)); } -EXPORT_SYMBOL(swiotlb_dma_mapping_error); /* * Return whether the given device DMA address mask can be supported @@ -1083,4 +1087,49 @@ swiotlb_dma_supported(struct device *hwdev, u64 mask) { return swiotlb_phys_to_dma(hwdev, io_tlb_end - 1) <= mask; } -EXPORT_SYMBOL(swiotlb_dma_supported); + +#ifdef CONFIG_DMA_DIRECT_OPS +void *swiotlb_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t gfp, unsigned long attrs) +{ + void *vaddr; + + /* temporary workaround: */ + if (gfp & __GFP_NOWARN) + attrs |= DMA_ATTR_NO_WARN; + + /* + * Don't print a warning when the first allocation attempt fails. + * swiotlb_alloc_coherent() will print a warning when the DMA memory + * allocation ultimately failed. + */ + gfp |= __GFP_NOWARN; + + vaddr = dma_direct_alloc(dev, size, dma_handle, gfp, attrs); + if (!vaddr) + vaddr = swiotlb_alloc_buffer(dev, size, dma_handle, attrs); + return vaddr; +} + +void swiotlb_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_addr, unsigned long attrs) +{ + if (!swiotlb_free_buffer(dev, size, dma_addr)) + dma_direct_free(dev, size, vaddr, dma_addr, attrs); +} + +const struct dma_map_ops swiotlb_dma_ops = { + .mapping_error = swiotlb_dma_mapping_error, + .alloc = swiotlb_alloc, + .free = swiotlb_free, + .sync_single_for_cpu = swiotlb_sync_single_for_cpu, + .sync_single_for_device = swiotlb_sync_single_for_device, + .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = swiotlb_sync_sg_for_device, + .map_sg = swiotlb_map_sg_attrs, + .unmap_sg = swiotlb_unmap_sg_attrs, + .map_page = swiotlb_map_page, + .unmap_page = swiotlb_unmap_page, + .dma_supported = swiotlb_dma_supported, +}; +#endif /* CONFIG_DMA_DIRECT_OPS */ |
