diff options
| -rw-r--r-- | arch/nds32/Kconfig | 3 | ||||
| -rw-r--r-- | arch/nds32/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/nds32/include/asm/dma-mapping.h | 14 | ||||
| -rw-r--r-- | arch/nds32/kernel/dma.c | 113 |
4 files changed, 15 insertions, 116 deletions
diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig index 249f38d3388f..67d0ac0a989c 100644 --- a/arch/nds32/Kconfig +++ b/arch/nds32/Kconfig @@ -5,10 +5,13 @@ config NDS32 def_bool y + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_WANT_FRAME_POINTERS if FTRACE select CLKSRC_MMIO select CLONE_BACKWARDS select COMMON_CLK + select DMA_NONCOHERENT_OPS select GENERIC_ATOMIC64 select GENERIC_CPU_DEVICES select GENERIC_CLOCKEVENTS diff --git a/arch/nds32/include/asm/Kbuild b/arch/nds32/include/asm/Kbuild index 06bdf8167f5a..b3e951f805f8 100644 --- a/arch/nds32/include/asm/Kbuild +++ b/arch/nds32/include/asm/Kbuild @@ -13,6 +13,7 @@ generic-y += cputime.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 += errno.h generic-y += exec.h diff --git a/arch/nds32/include/asm/dma-mapping.h b/arch/nds32/include/asm/dma-mapping.h deleted file mode 100644 index 2dd47d245c25..000000000000 --- a/arch/nds32/include/asm/dma-mapping.h +++ /dev/null @@ -1,14 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (C) 2005-2017 Andes Technology Corporation - -#ifndef ASMNDS32_DMA_MAPPING_H -#define ASMNDS32_DMA_MAPPING_H - -extern struct dma_map_ops nds32_dma_ops; - -static inline struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &nds32_dma_ops; -} - -#endif diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c index b9973317c734..d0dbd4fe9645 100644 --- a/arch/nds32/kernel/dma.c +++ b/arch/nds32/kernel/dma.c @@ -3,17 +3,14 @@ #include <linux/types.h> #include <linux/mm.h> -#include <linux/export.h> #include <linux/string.h> -#include <linux/scatterlist.h> -#include <linux/dma-mapping.h> +#include <linux/dma-noncoherent.h> #include <linux/io.h> #include <linux/cache.h> #include <linux/highmem.h> #include <linux/slab.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> -#include <asm/dma-mapping.h> #include <asm/proc-fns.h> /* @@ -119,10 +116,8 @@ out: return c; } -/* FIXME: attrs is not used. */ -static void *nds32_dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t * handle, gfp_t gfp, - unsigned long attrs) +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, + gfp_t gfp, unsigned long attrs) { struct page *page; struct arch_vm_region *c; @@ -227,8 +222,8 @@ no_page: return NULL; } -static void nds32_dma_free(struct device *dev, size_t size, void *cpu_addr, - dma_addr_t handle, unsigned long attrs) +void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t handle, unsigned long attrs) { struct arch_vm_region *c; unsigned long flags, addr; @@ -365,118 +360,32 @@ static inline void cache_op(phys_addr_t paddr, size_t size, } while (left); } -static void -nds32_dma_sync_single_for_device(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { switch (dir) { case DMA_FROM_DEVICE: break; case DMA_TO_DEVICE: case DMA_BIDIRECTIONAL: - cache_op(handle, size, cpu_dma_wb_range); + cache_op(paddr, size, cpu_dma_wb_range); break; default: BUG(); } } -static void -nds32_dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { switch (dir) { case DMA_TO_DEVICE: break; case DMA_FROM_DEVICE: case DMA_BIDIRECTIONAL: - cache_op(handle, size, cpu_dma_inval_range); + cache_op(paddr, size, cpu_dma_inval_range); break; default: BUG(); } } - -static dma_addr_t nds32_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 dma_addr = page_to_phys(page) + offset; - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - nds32_dma_sync_single_for_device(dev, handle, size, dir); - return dma_addr; -} - -static void nds32_dma_unmap_page(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir, - unsigned long attrs) -{ - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - nds32_dma_sync_single_for_cpu(dev, handle, size, dir); -} - -static void -nds32_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) -{ - int i; - - for (i = 0; i < nents; i++, sg++) { - nds32_dma_sync_single_for_device(dev, sg_dma_address(sg), - sg->length, dir); - } -} - -static void -nds32_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) -{ - int i; - - for (i = 0; i < nents; i++, sg++) { - nds32_dma_sync_single_for_cpu(dev, sg_dma_address(sg), - sg->length, dir); - } -} - -static int nds32_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - int i; - - for (i = 0; i < nents; i++, sg++) { - nds32_dma_sync_single_for_device(dev, sg_dma_address(sg), - sg->length, dir); - } - return nents; -} - -static void nds32_dma_unmap_sg(struct device *dev, struct scatterlist *sg, - int nhwentries, enum dma_data_direction dir, - unsigned long attrs) -{ - int i; - - for (i = 0; i < nhwentries; i++, sg++) { - nds32_dma_sync_single_for_cpu(dev, sg_dma_address(sg), - sg->length, dir); - } -} - -struct dma_map_ops nds32_dma_ops = { - .alloc = nds32_dma_alloc_coherent, - .free = nds32_dma_free, - .map_page = nds32_dma_map_page, - .unmap_page = nds32_dma_unmap_page, - .map_sg = nds32_dma_map_sg, - .unmap_sg = nds32_dma_unmap_sg, - .sync_single_for_device = nds32_dma_sync_single_for_device, - .sync_single_for_cpu = nds32_dma_sync_single_for_cpu, - .sync_sg_for_cpu = nds32_dma_sync_sg_for_cpu, - .sync_sg_for_device = nds32_dma_sync_sg_for_device, -}; - -EXPORT_SYMBOL(nds32_dma_ops); |