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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/microblaze
parent23c258763ba992f6a95a4b8980ffa7c1890bc8d8 (diff)
parentc9eb6172c328dde7e14812f94f8da87b691e41b5 (diff)
downloadlinux-e37e0ee0190034a059c9faea8adfb4982fb24ddd.tar.bz2
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/microblaze')
-rw-r--r--arch/microblaze/include/asm/dma-mapping.h39
-rw-r--r--arch/microblaze/kernel/dma.c17
2 files changed, 17 insertions, 39 deletions
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h
index e15cd2f76e23..6b9ea39405b8 100644
--- a/arch/microblaze/include/asm/dma-mapping.h
+++ b/arch/microblaze/include/asm/dma-mapping.h
@@ -16,22 +16,6 @@
#define _ASM_MICROBLAZE_DMA_MAPPING_H
/*
- * See Documentation/DMA-API-HOWTO.txt and
- * Documentation/DMA-API.txt for documentation.
- */
-
-#include <linux/types.h>
-#include <linux/cache.h>
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-#include <asm/io.h>
-#include <asm/cacheflush.h>
-
-#define __dma_alloc_coherent(dev, gfp, size, handle) NULL
-#define __dma_free_coherent(size, addr) ((void)0)
-
-/*
* Available generic sets of operations
*/
extern const struct dma_map_ops dma_direct_ops;
@@ -41,27 +25,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return &dma_direct_ops;
}
-static inline void __dma_sync(unsigned long paddr,
- size_t size, enum dma_data_direction direction)
-{
- switch (direction) {
- case DMA_TO_DEVICE:
- case DMA_BIDIRECTIONAL:
- flush_dcache_range(paddr, paddr + size);
- break;
- case DMA_FROM_DEVICE:
- invalidate_dcache_range(paddr, paddr + size);
- break;
- default:
- BUG();
- }
-}
-
-static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(direction == DMA_NONE);
- __dma_sync(virt_to_phys(vaddr), size, (int)direction);
-}
-
#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index e63f154be964..990bf9ea0ec6 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -13,6 +13,7 @@
#include <linux/dma-debug.h>
#include <linux/export.h>
#include <linux/bug.h>
+#include <asm/cacheflush.h>
#define NOT_COHERENT_CACHE
@@ -52,6 +53,22 @@ static void dma_direct_free_coherent(struct device *dev, size_t size,
#endif
}
+static inline void __dma_sync(unsigned long paddr,
+ size_t size, enum dma_data_direction direction)
+{
+ switch (direction) {
+ case DMA_TO_DEVICE:
+ case DMA_BIDIRECTIONAL:
+ flush_dcache_range(paddr, paddr + size);
+ break;
+ case DMA_FROM_DEVICE:
+ invalidate_dcache_range(paddr, paddr + size);
+ break;
+ default:
+ BUG();
+ }
+}
+
static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
int nents, enum dma_data_direction direction,
unsigned long attrs)