diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index ed5f32d8fbd8..e0081e734827 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -6,6 +6,8 @@ config OPENRISC def_bool y + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select DMA_NONCOHERENT_OPS select OF select OF_EARLY_FLATTREE select IRQ_DOMAIN diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild index 65964d390b10..eb87cd8327c8 100644 --- a/arch/openrisc/include/asm/Kbuild +++ b/arch/openrisc/include/asm/Kbuild @@ -7,6 +7,7 @@ generic-y += current.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/openrisc/include/asm/dma-mapping.h b/arch/openrisc/include/asm/dma-mapping.h deleted file mode 100644 index e212a1f0b6d2..000000000000 --- a/arch/openrisc/include/asm/dma-mapping.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * OpenRISC Linux - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * OpenRISC implementation: - * Copyright (C) 2010-2011 Jonas Bonn - * - * 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. - */ - -#ifndef __ASM_OPENRISC_DMA_MAPPING_H -#define __ASM_OPENRISC_DMA_MAPPING_H - -/* - * See Documentation/DMA-API-HOWTO.txt and - * Documentation/DMA-API.txt for documentation. - */ - -#include -#include - -extern const struct dma_map_ops or1k_dma_map_ops; - -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -{ - return &or1k_dma_map_ops; -} - -#endif /* __ASM_OPENRISC_DMA_MAPPING_H */ diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c index ec7fd45704d2..159336adfa2f 100644 --- a/arch/openrisc/kernel/dma.c +++ b/arch/openrisc/kernel/dma.c @@ -19,9 +19,7 @@ * the only thing implemented properly. The rest need looking into... */ -#include -#include -#include +#include #include #include @@ -80,10 +78,9 @@ page_clear_nocache(pte_t *pte, unsigned long addr, * is being ignored for now; uncached but write-combined memory is a * missing feature of the OR1K. */ -static void * -or1k_dma_alloc(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) { unsigned long va; void *page; @@ -115,9 +112,9 @@ or1k_dma_alloc(struct device *dev, size_t size, return (void *)va; } -static void -or1k_dma_free(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) { unsigned long va = (unsigned long)vaddr; struct mm_walk walk = { @@ -133,19 +130,12 @@ or1k_dma_free(struct device *dev, size_t size, void *vaddr, free_pages_exact(vaddr, size); } -static dma_addr_t -or1k_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - unsigned long attrs) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t addr, size_t size, + enum dma_data_direction dir) { unsigned long cl; - dma_addr_t addr = page_to_phys(page) + offset; struct cpuinfo_or1k *cpuinfo = &cpuinfo_or1k[smp_processor_id()]; - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return addr; - switch (dir) { case DMA_TO_DEVICE: /* Flush the dcache for the requested range */ @@ -167,83 +157,4 @@ or1k_map_page(struct device *dev, struct page *page, */ break; } - - return addr; } - -static void -or1k_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir, - unsigned long attrs) -{ - /* Nothing special to do here... */ -} - -static int -or1k_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nents, i) { - s->dma_address = or1k_map_page(dev, sg_page(s), s->offset, - s->length, dir, 0); - } - - return nents; -} - -static void -or1k_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nents, i) { - or1k_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir, 0); - } -} - -static void -or1k_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) -{ - unsigned long cl; - dma_addr_t addr = dma_handle; - struct cpuinfo_or1k *cpuinfo = &cpuinfo_or1k[smp_processor_id()]; - - /* Invalidate the dcache for the requested range */ - for (cl = addr; cl < addr + size; cl += cpuinfo->dcache_block_size) - mtspr(SPR_DCBIR, cl); -} - -static void -or1k_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) -{ - unsigned long cl; - dma_addr_t addr = dma_handle; - struct cpuinfo_or1k *cpuinfo = &cpuinfo_or1k[smp_processor_id()]; - - /* Flush the dcache for the requested range */ - for (cl = addr; cl < addr + size; cl += cpuinfo->dcache_block_size) - mtspr(SPR_DCBFR, cl); -} - -const struct dma_map_ops or1k_dma_map_ops = { - .alloc = or1k_dma_alloc, - .free = or1k_dma_free, - .map_page = or1k_map_page, - .unmap_page = or1k_unmap_page, - .map_sg = or1k_map_sg, - .unmap_sg = or1k_unmap_sg, - .sync_single_for_cpu = or1k_sync_single_for_cpu, - .sync_single_for_device = or1k_sync_single_for_device, -}; -EXPORT_SYMBOL(or1k_dma_map_ops);