From c9eb6172c328dde7e14812f94f8da87b691e41b5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 27 Aug 2017 10:37:15 +0200 Subject: dma-mapping: turn dma_cache_sync into a dma_map_ops method After we removed all the dead wood it turns out only two architectures actually implement dma_cache_sync as a real op: mips and parisc. Add a cache_sync method to struct dma_map_ops and implement it for the mips defualt DMA ops, and the parisc pa11 ops. Note that arm, arc and openrisc support DMA_ATTR_NON_CONSISTENT, but never provided a functional dma_cache_sync implementations, which seems somewhat odd. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- arch/parisc/kernel/pci-dma.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/parisc/kernel') diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index bd4c0a7471d3..f87c34cb3b43 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -571,6 +571,12 @@ static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist * flush_kernel_vmap_range(sg_virt(sg), sg->length); } +static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction direction) +{ + flush_kernel_dcache_range((unsigned long)vaddr, size); +} + const struct dma_map_ops pcxl_dma_ops = { .dma_supported = pa11_dma_supported, .alloc = pa11_dma_alloc, @@ -583,6 +589,7 @@ const struct dma_map_ops pcxl_dma_ops = { .sync_single_for_device = pa11_dma_sync_single_for_device, .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, .sync_sg_for_device = pa11_dma_sync_sg_for_device, + .cache_sync = pa11_dma_cache_sync, }; static void *pcx_dma_alloc(struct device *dev, size_t size, @@ -619,4 +626,5 @@ const struct dma_map_ops pcx_dma_ops = { .sync_single_for_device = pa11_dma_sync_single_for_device, .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, .sync_sg_for_device = pa11_dma_sync_sg_for_device, + .cache_sync = pa11_dma_cache_sync, }; -- cgit