From 6fa1d28e38cfa0c90f8d64c0cab37769e5337b85 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 11 May 2018 08:36:53 +0200 Subject: sh: use generic dma_noncoherent_ops Switch to the generic noncoherent direct mapping implementation. Signed-off-by: Christoph Hellwig Acked-by: Yoshinori Sato --- arch/sh/kernel/dma-nommu.c | 78 ---------------------------------------------- 1 file changed, 78 deletions(-) delete mode 100644 arch/sh/kernel/dma-nommu.c (limited to 'arch/sh/kernel/dma-nommu.c') 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 -#include -#include - -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); -- cgit v1.2.3-59-g8ed1b