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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 16:54:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-14 16:54:12 -0800
commite37e0ee0190034a059c9faea8adfb4982fb24ddd (patch)
treeba6d6da8ae099eb734f4d8d33bf648fe0dfa39e7 /arch/sh
parent23c258763ba992f6a95a4b8980ffa7c1890bc8d8 (diff)
parentc9eb6172c328dde7e14812f94f8da87b691e41b5 (diff)
Merge tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig: - turn dma_cache_sync into a dma_map_ops instance and remove implementation that purely are dead because the architecture doesn't support noncoherent allocations - add a flag for busses that need DMA configuration (Robin Murphy) * tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: turn dma_cache_sync into a dma_map_ops method sh: make dma_cache_sync a no-op xtensa: make dma_cache_sync a no-op unicore32: make dma_cache_sync a no-op powerpc: make dma_cache_sync a no-op mn10300: make dma_cache_sync a no-op microblaze: make dma_cache_sync a no-op ia64: make dma_cache_sync a no-op frv: make dma_cache_sync a no-op x86: make dma_cache_sync a no-op floppy: consolidate the dummy fd_cacheflush definition drivers: flag buses which demand DMA configuration
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/include/asm/dma-mapping.h7
-rw-r--r--arch/sh/kernel/dma-nommu.c17
-rw-r--r--arch/sh/mm/consistent.c6
3 files changed, 15 insertions, 15 deletions
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 68c1536b3aab..41167931e5d9 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -10,10 +10,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return dma_ops;
}
-void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction dir);
-
-/* arch/sh/mm/consistent.c */
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
unsigned long attrs);
@@ -21,4 +17,7 @@ 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/dma-nommu.c b/arch/sh/kernel/dma-nommu.c
index d24c707b2181..62b485107eae 100644
--- a/arch/sh/kernel/dma-nommu.c
+++ b/arch/sh/kernel/dma-nommu.c
@@ -9,6 +9,7 @@
*/
#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,
@@ -20,7 +21,7 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page,
WARN_ON(size == 0);
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_cache_sync(dev, page_address(page) + offset, size, dir);
+ sh_sync_dma_for_device(page_address(page) + offset, size, dir);
return addr;
}
@@ -38,7 +39,7 @@ static int nommu_map_sg(struct device *dev, struct scatterlist *sg,
BUG_ON(!sg_page(s));
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_cache_sync(dev, sg_virt(s), s->length, dir);
+ sh_sync_dma_for_device(sg_virt(s), s->length, dir);
s->dma_address = sg_phys(s);
s->dma_length = s->length;
@@ -48,20 +49,20 @@ static int nommu_map_sg(struct device *dev, struct scatterlist *sg,
}
#ifdef CONFIG_DMA_NONCOHERENT
-static void nommu_sync_single(struct device *dev, dma_addr_t addr,
+static void nommu_sync_single_for_device(struct device *dev, dma_addr_t addr,
size_t size, enum dma_data_direction dir)
{
- dma_cache_sync(dev, phys_to_virt(addr), size, dir);
+ sh_sync_dma_for_device(phys_to_virt(addr), size, dir);
}
-static void nommu_sync_sg(struct device *dev, struct scatterlist *sg,
+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)
- dma_cache_sync(dev, sg_virt(s), s->length, dir);
+ sh_sync_dma_for_device(sg_virt(s), s->length, dir);
}
#endif
@@ -71,8 +72,8 @@ const struct dma_map_ops nommu_dma_ops = {
.map_page = nommu_map_page,
.map_sg = nommu_map_sg,
#ifdef CONFIG_DMA_NONCOHERENT
- .sync_single_for_device = nommu_sync_single,
- .sync_sg_for_device = nommu_sync_sg,
+ .sync_single_for_device = nommu_sync_single_for_device,
+ .sync_sg_for_device = nommu_sync_sg_for_device,
#endif
.is_phys = 1,
};
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index d1275adfa0ef..6ea3aab508f2 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -49,7 +49,7 @@ 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.
*/
- dma_cache_sync(dev, ret, size, DMA_BIDIRECTIONAL);
+ sh_sync_dma_for_device(ret, size, DMA_BIDIRECTIONAL);
ret_nocache = (void __force *)ioremap_nocache(virt_to_phys(ret), size);
if (!ret_nocache) {
@@ -78,7 +78,7 @@ void dma_generic_free_coherent(struct device *dev, size_t size,
iounmap(vaddr);
}
-void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+void sh_sync_dma_for_device(void *vaddr, size_t size,
enum dma_data_direction direction)
{
void *addr;
@@ -100,7 +100,7 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
BUG();
}
}
-EXPORT_SYMBOL(dma_cache_sync);
+EXPORT_SYMBOL(sh_sync_dma_for_device);
static int __init memchunk_setup(char *str)
{