Octeon and Loongson share exactly the same code, move it into a common implementation, and use that implementation directly from get_arch_dma_ops.
Also provide the expected dma-direct.h helpers directly instead of delegating to platform dma-coherence.h headers. Signed-off-by: Christoph Hellwig <[email protected]> --- arch/mips/cavium-octeon/dma-octeon.c | 61 ---------------- arch/mips/include/asm/dma-direct.h | 17 ++++- arch/mips/include/asm/dma-mapping.h | 5 ++ .../asm/mach-cavium-octeon/dma-coherence.h | 11 --- .../asm/mach-loongson64/dma-coherence.h | 10 --- arch/mips/loongson64/common/dma-swiotlb.c | 71 +------------------ arch/mips/mm/Makefile | 1 + arch/mips/mm/dma-swiotlb.c | 61 ++++++++++++++++ 8 files changed, 84 insertions(+), 153 deletions(-) create mode 100644 arch/mips/mm/dma-swiotlb.c diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index 7f0c9f926b6e..236833be6fbe 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -11,7 +11,6 @@ * Copyright (C) 2010 Cavium Networks, Inc. */ #include <linux/dma-direct.h> -#include <linux/scatterlist.h> #include <linux/bootmem.h> #include <linux/swiotlb.h> #include <linux/types.h> @@ -169,49 +168,6 @@ void __init octeon_pci_dma_init(void) } #endif /* CONFIG_PCI */ -static dma_addr_t octeon_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, enum dma_data_direction direction, - unsigned long attrs) -{ - dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size, - direction, attrs); - mb(); - - return daddr; -} - -static int octeon_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction direction, unsigned long attrs) -{ - int r = swiotlb_map_sg_attrs(dev, sg, nents, direction, attrs); - mb(); - return r; -} - -static void octeon_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) -{ - swiotlb_sync_single_for_device(dev, dma_handle, size, direction); - mb(); -} - -static void octeon_dma_sync_sg_for_device(struct device *dev, - struct scatterlist *sg, int nelems, enum dma_data_direction direction) -{ - swiotlb_sync_sg_for_device(dev, sg, nelems, direction); - mb(); -} - -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 = swiotlb_alloc(dev, size, dma_handle, gfp, attrs); - - mb(); - - return ret; -} - dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) { #ifdef CONFIG_PCI @@ -230,21 +186,6 @@ phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr) return daddr; } -static const struct dma_map_ops octeon_swiotlb_ops = { - .alloc = octeon_dma_alloc_coherent, - .free = swiotlb_free, - .map_page = octeon_dma_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = octeon_dma_map_sg, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = octeon_dma_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = octeon_dma_sync_sg_for_device, - .mapping_error = swiotlb_dma_mapping_error, - .dma_supported = swiotlb_dma_supported -}; - char *octeon_swiotlb; void __init plat_swiotlb_setup(void) @@ -307,6 +248,4 @@ void __init plat_swiotlb_setup(void) if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM) panic("Cannot allocate SWIOTLB buffer"); - - mips_dma_map_ops = &octeon_swiotlb_ops; } diff --git a/arch/mips/include/asm/dma-direct.h b/arch/mips/include/asm/dma-direct.h index f32f15530aba..b5c240806e1b 100644 --- a/arch/mips/include/asm/dma-direct.h +++ b/arch/mips/include/asm/dma-direct.h @@ -1 +1,16 @@ -#include <asm/dma-coherence.h> +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _MIPS_DMA_DIRECT_H +#define _MIPS_DMA_DIRECT_H 1 + +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); + +#endif /* _MIPS_DMA_DIRECT_H */ diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index 886e75a383f2..ebcce3e22297 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -11,10 +11,15 @@ #endif extern const struct dma_map_ops *mips_dma_map_ops; +extern const struct dma_map_ops mips_swiotlb_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { +#ifdef CONFIG_SWIOTLB + return &mips_swiotlb_ops; +#else return mips_dma_map_ops; +#endif } #define arch_setup_dma_ops arch_setup_dma_ops 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 c5cdeea495f8..c0254c72d97b 100644 --- a/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h +++ b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h @@ -61,17 +61,6 @@ 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); - extern char *octeon_swiotlb; #endif /* __ASM_MACH_CAVIUM_OCTEON_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 64fc44dec0a8..b8825a7d1279 100644 --- a/arch/mips/include/asm/mach-loongson64/dma-coherence.h +++ b/arch/mips/include/asm/mach-loongson64/dma-coherence.h @@ -17,16 +17,6 @@ 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, size_t size) { diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/common/dma-swiotlb.c index a5e50f2ec301..a4f554bf1232 100644 --- a/arch/mips/loongson64/common/dma-swiotlb.c +++ b/arch/mips/loongson64/common/dma-swiotlb.c @@ -1,60 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 -#include <linux/mm.h> +#include <linux/dma-direct.h> #include <linux/init.h> -#include <linux/dma-mapping.h> -#include <linux/scatterlist.h> #include <linux/swiotlb.h> -#include <linux/bootmem.h> - -#include <asm/bootinfo.h> -#include <boot_param.h> -#include <dma-coherence.h> - -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 = swiotlb_alloc(dev, size, dma_handle, gfp, attrs); - - mb(); - return ret; -} - -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, - unsigned long attrs) -{ - dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size, - dir, attrs); - mb(); - return daddr; -} - -static int loongson_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, attrs); - mb(); - - return r; -} - -static void loongson_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) -{ - swiotlb_sync_single_for_device(dev, dma_handle, size, dir); - mb(); -} - -static void loongson_dma_sync_sg_for_device(struct device *dev, - struct scatterlist *sg, int nents, - enum dma_data_direction dir) -{ - swiotlb_sync_sg_for_device(dev, sg, nents, dir); - mb(); -} dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) { @@ -80,23 +27,7 @@ phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr) return daddr; } -static const struct dma_map_ops loongson_dma_map_ops = { - .alloc = loongson_dma_alloc_coherent, - .free = swiotlb_free, - .map_page = loongson_dma_map_page, - .unmap_page = swiotlb_unmap_page, - .map_sg = loongson_dma_map_sg, - .unmap_sg = swiotlb_unmap_sg_attrs, - .sync_single_for_cpu = swiotlb_sync_single_for_cpu, - .sync_single_for_device = loongson_dma_sync_single_for_device, - .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, - .sync_sg_for_device = loongson_dma_sync_sg_for_device, - .mapping_error = swiotlb_dma_mapping_error, - .dma_supported = swiotlb_dma_supported, -}; - void __init plat_swiotlb_setup(void) { swiotlb_init(1); - mips_dma_map_ops = &loongson_dma_map_ops; } diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile index c463bdad45c7..b87e4258fd78 100644 --- a/arch/mips/mm/Makefile +++ b/arch/mips/mm/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o obj-$(CONFIG_64BIT) += pgtable-64.o obj-$(CONFIG_HIGHMEM) += highmem.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o +obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o obj-$(CONFIG_CPU_R3000) += c-r3k.o tlb-r3k.o diff --git a/arch/mips/mm/dma-swiotlb.c b/arch/mips/mm/dma-swiotlb.c new file mode 100644 index 000000000000..6014ed3479fd --- /dev/null +++ b/arch/mips/mm/dma-swiotlb.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/dma-mapping.h> +#include <linux/swiotlb.h> + +static void *mips_swiotlb_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) +{ + void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs); + + mb(); + return ret; +} + +static dma_addr_t mips_swiotlb_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 daddr = swiotlb_map_page(dev, page, offset, size, + dir, attrs); + mb(); + return daddr; +} + +static int mips_swiotlb_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, unsigned long attrs) +{ + int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, attrs); + mb(); + + return r; +} + +static void mips_swiotlb_sync_single_for_device(struct device *dev, + dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) +{ + swiotlb_sync_single_for_device(dev, dma_handle, size, dir); + mb(); +} + +static void mips_swiotlb_sync_sg_for_device(struct device *dev, + struct scatterlist *sg, int nents, enum dma_data_direction dir) +{ + swiotlb_sync_sg_for_device(dev, sg, nents, dir); + mb(); +} + +const struct dma_map_ops mips_swiotlb_ops = { + .alloc = mips_swiotlb_alloc, + .free = swiotlb_free, + .map_page = mips_swiotlb_map_page, + .unmap_page = swiotlb_unmap_page, + .map_sg = mips_swiotlb_map_sg, + .unmap_sg = swiotlb_unmap_sg_attrs, + .sync_single_for_cpu = swiotlb_sync_single_for_cpu, + .sync_single_for_device = mips_swiotlb_sync_single_for_device, + .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = mips_swiotlb_sync_sg_for_device, + .mapping_error = swiotlb_dma_mapping_error, + .dma_supported = swiotlb_dma_supported, +}; +EXPORT_SYMBOL(mips_swiotlb_ops); -- 2.17.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
