diff options
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/Kconfig | 3 | ||||
| -rw-r--r-- | arch/sh/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/sh/include/asm/dma-mapping.h | 26 | ||||
| -rw-r--r-- | arch/sh/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/kernel/dma-coherent.c | 23 | ||||
| -rw-r--r-- | arch/sh/kernel/dma-nommu.c | 78 |
6 files changed, 15 insertions, 118 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index c9993a0cdc7e..da4db4b5359f 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -51,7 +51,6 @@ config SUPERH select HAVE_ARCH_AUDITSYSCALL select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_NMI - select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH help @@ -164,6 +163,8 @@ config DMA_COHERENT config DMA_NONCOHERENT def_bool !DMA_COHERENT + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select DMA_NONCOHERENT_OPS config PGTABLE_LEVELS default 3 if X2TLB diff --git a/arch/sh/include/asm/Kbuild b/arch/sh/include/asm/Kbuild index 46dd82ab2c29..6a5609a55965 100644 --- a/arch/sh/include/asm/Kbuild +++ b/arch/sh/include/asm/Kbuild @@ -2,6 +2,7 @@ generic-y += compat.h generic-y += current.h generic-y += delay.h generic-y += div64.h +generic-y += dma-mapping.h generic-y += emergency-restart.h generic-y += exec.h generic-y += irq_regs.h diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h deleted file mode 100644 index 1ebc6a4eb1c5..000000000000 --- a/arch/sh/include/asm/dma-mapping.h +++ /dev/null @@ -1,26 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __ASM_SH_DMA_MAPPING_H -#define __ASM_SH_DMA_MAPPING_H - -extern const struct dma_map_ops nommu_dma_ops; - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ -#ifdef CONFIG_DMA_NONCOHERENT - return &nommu_dma_ops; -#else - return &dma_direct_ops; -#endif -} - -extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_addr, gfp_t flag, - unsigned long attrs); -extern void dma_generic_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - unsigned long attrs); - -void sh_sync_dma_for_device(void *vaddr, size_t size, - enum dma_data_direction dir); - -#endif /* __ASM_SH_DMA_MAPPING_H */ diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index d5ddb64bfffe..59673f8a3379 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -45,7 +45,7 @@ obj-$(CONFIG_DUMP_CODE) += disassemble.o obj-$(CONFIG_HIBERNATION) += swsusp.o obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o -obj-$(CONFIG_DMA_NONCOHERENT) += dma-nommu.o dma-coherent.o +obj-$(CONFIG_DMA_NONCOHERENT) += dma-coherent.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o ccflags-y := -Werror diff --git a/arch/sh/kernel/dma-coherent.c b/arch/sh/kernel/dma-coherent.c index 2518065d5d27..a0021eef956b 100644 --- a/arch/sh/kernel/dma-coherent.c +++ b/arch/sh/kernel/dma-coherent.c @@ -7,14 +7,13 @@ */ #include <linux/mm.h> #include <linux/init.h> -#include <linux/dma-mapping.h> +#include <linux/dma-noncoherent.h> #include <linux/module.h> #include <asm/cacheflush.h> #include <asm/addrspace.h> -void *dma_generic_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t gfp, unsigned long attrs) { void *ret, *ret_nocache; int order = get_order(size); @@ -29,7 +28,8 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, * Pages from the page allocator may have data present in * cache. So flush the cache before using uncached memory. */ - sh_sync_dma_for_device(ret, size, DMA_BIDIRECTIONAL); + arch_sync_dma_for_device(dev, virt_to_phys(ret), size, + DMA_BIDIRECTIONAL); ret_nocache = (void __force *)ioremap_nocache(virt_to_phys(ret), size); if (!ret_nocache) { @@ -46,9 +46,8 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, return ret_nocache; } -void dma_generic_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - unsigned long attrs) +void arch_dma_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, unsigned long attrs) { int order = get_order(size); unsigned long pfn = (dma_handle >> PAGE_SHIFT); @@ -63,12 +62,12 @@ void dma_generic_free_coherent(struct device *dev, size_t size, iounmap(vaddr); } -void sh_sync_dma_for_device(void *vaddr, size_t size, - enum dma_data_direction direction) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { - void *addr = sh_cacheop_vaddr(vaddr); + void *addr = sh_cacheop_vaddr(phys_to_virt(paddr)); - switch (direction) { + switch (dir) { case DMA_FROM_DEVICE: /* invalidate only */ __flush_invalidate_region(addr, size); break; diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c deleted file mode 100644 index d8689b1cb743..000000000000 --- a/arch/sh/kernel/dma-nommu.c +++ /dev/null @@ -1,78 +0,0 @@ -/* - * DMA mapping support for platforms lacking IOMMUs. - * - * Copyright (C) 2009 Paul Mundt - * - * 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/io.h> -#include <asm/cacheflush.h> - -static dma_addr_t nommu_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 addr = page_to_phys(page) + offset - - PFN_PHYS(dev->dma_pfn_offset); - - WARN_ON(size == 0); - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - sh_sync_dma_for_device(page_address(page) + offset, size, dir); - - return addr; -} - -static int nommu_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - struct scatterlist *s; - int i; - - WARN_ON(nents == 0 || sg[0].length == 0); - - for_each_sg(sg, s, nents, i) { - dma_addr_t offset = PFN_PHYS(dev->dma_pfn_offset); - - BUG_ON(!sg_page(s)); - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - sh_sync_dma_for_device(sg_virt(s), s->length, dir); - - s->dma_address = sg_phys(s) - offset; - s->dma_length = s->length; - } - - return nents; -} - -static void nommu_sync_single_for_device(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir) -{ - sh_sync_dma_for_device(phys_to_virt(addr), size, dir); -} - -static void nommu_sync_sg_for_device(struct device *dev, struct scatterlist *sg, - int nelems, enum dma_data_direction dir) -{ - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nelems, i) - sh_sync_dma_for_device(sg_virt(s), s->length, dir); -} - -const struct dma_map_ops nommu_dma_ops = { - .alloc = dma_generic_alloc_coherent, - .free = dma_generic_free_coherent, - .map_page = nommu_map_page, - .map_sg = nommu_map_sg, - .sync_single_for_device = nommu_sync_single_for_device, - .sync_sg_for_device = nommu_sync_sg_for_device, -}; -EXPORT_SYMBOL(nommu_dma_ops); |