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Date: Thu, 8 Jul 2010 15:57:47 +0900
From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, fujita.tomonori@....ntt.co.jp,
linux-arch@...r.kernel.org
Subject: [PATCH -mm 2/3] unify dma_get_cache_alignment implementations
dma_get_cache_alignment returns the minimum DMA
alignment. Architectures defines it as ARCH_DMA_MINALIGN (formally
ARCH_KMALLOC_MINALIGN). So we can unify dma_get_cache_alignment
implementations.
Note that some architectures implement dma_get_cache_alignment
wrongly. dma_get_cache_alignment() should return the minimum DMA
alignment. So fully-coherent architectures should return 1. This patch
also fixes this issue.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
---
arch/alpha/include/asm/dma-mapping.h | 1 -
arch/arm/include/asm/dma-mapping.h | 5 -----
arch/avr32/include/asm/dma-mapping.h | 5 -----
arch/blackfin/include/asm/dma-mapping.h | 1 -
arch/cris/include/asm/dma-mapping.h | 6 ------
arch/frv/include/asm/dma-mapping.h | 6 ------
arch/ia64/include/asm/dma-mapping.h | 2 --
arch/ia64/kernel/setup.c | 6 ------
arch/m68k/include/asm/dma-mapping.h | 5 -----
arch/microblaze/include/asm/dma-mapping.h | 5 -----
arch/mips/include/asm/dma-mapping.h | 7 -------
arch/mn10300/include/asm/dma-mapping.h | 6 ------
arch/parisc/include/asm/dma-mapping.h | 6 ------
arch/powerpc/include/asm/dma-mapping.h | 15 ---------------
arch/sh/include/asm/dma-mapping.h | 9 ---------
arch/sparc/include/asm/dma-mapping.h | 9 ---------
arch/tile/include/asm/dma-mapping.h | 7 -------
arch/x86/include/asm/dma-mapping.h | 7 -------
arch/xtensa/include/asm/dma-mapping.h | 6 ------
include/linux/dma-mapping.h | 8 ++++++++
20 files changed, 8 insertions(+), 114 deletions(-)
diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h
index 1bce816..b3423d9 100644
--- a/arch/alpha/include/asm/dma-mapping.h
+++ b/arch/alpha/include/asm/dma-mapping.h
@@ -44,6 +44,5 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
#define dma_is_consistent(d, h) (1)
#define dma_cache_sync(dev, va, size, dir) ((void)0)
-#define dma_get_cache_alignment() L1_CACHE_BYTES
#endif /* _ALPHA_DMA_MAPPING_H */
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 69ce072..f4a996d 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -144,11 +144,6 @@ static inline int dma_set_mask(struct device *dev, u64 dma_mask)
return 0;
}
-static inline int dma_get_cache_alignment(void)
-{
- return 32;
-}
-
static inline int dma_is_consistent(struct device *dev, dma_addr_t handle)
{
return !!arch_is_coherent();
diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
index 0399359..af6b816 100644
--- a/arch/avr32/include/asm/dma-mapping.h
+++ b/arch/avr32/include/asm/dma-mapping.h
@@ -341,9 +341,4 @@ static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
return 1;
}
-static inline int dma_get_cache_alignment(void)
-{
- return boot_cpu_data.dcache.linesz;
-}
-
#endif /* __ASM_AVR32_DMA_MAPPING_H */
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
index 212cb80..6694a0f 100644
--- a/arch/blackfin/include/asm/dma-mapping.h
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -21,7 +21,6 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#define dma_supported(d, m) (1)
-#define dma_get_cache_alignment() (32)
#define dma_is_consistent(d, h) (1)
static inline int
diff --git a/arch/cris/include/asm/dma-mapping.h b/arch/cris/include/asm/dma-mapping.h
index da8ef8e..fc30fd0 100644
--- a/arch/cris/include/asm/dma-mapping.h
+++ b/arch/cris/include/asm/dma-mapping.h
@@ -152,12 +152,6 @@ dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline int
-dma_get_cache_alignment(void)
-{
- return (1 << INTERNODE_CACHE_SHIFT);
-}
-
#define dma_is_consistent(d, h) (1)
static inline void
diff --git a/arch/frv/include/asm/dma-mapping.h b/arch/frv/include/asm/dma-mapping.h
index 6af5d83..7b05ce1 100644
--- a/arch/frv/include/asm/dma-mapping.h
+++ b/arch/frv/include/asm/dma-mapping.h
@@ -125,12 +125,6 @@ int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline
-int dma_get_cache_alignment(void)
-{
- return 1 << L1_CACHE_SHIFT;
-}
-
#define dma_is_consistent(d, h) (1)
static inline
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 7d09a09..8d52dee 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -86,8 +86,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
return daddr;
}
-extern int dma_get_cache_alignment(void);
-
static inline void
dma_cache_sync (struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 41ae6a5..8fb958a 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -98,12 +98,6 @@ static struct resource bss_resource = {
unsigned long ia64_max_cacheline_size;
-int dma_get_cache_alignment(void)
-{
- return ia64_max_cacheline_size;
-}
-EXPORT_SYMBOL(dma_get_cache_alignment);
-
unsigned long ia64_iobase; /* virtual address for I/O accesses */
EXPORT_SYMBOL(ia64_iobase);
struct io_space io_space[MAX_IO_SPACES];
diff --git a/arch/m68k/include/asm/dma-mapping.h b/arch/m68k/include/asm/dma-mapping.h
index 26f5054..a1ae732 100644
--- a/arch/m68k/include/asm/dma-mapping.h
+++ b/arch/m68k/include/asm/dma-mapping.h
@@ -16,11 +16,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline int dma_get_cache_alignment(void)
-{
- return 1 << L1_CACHE_SHIFT;
-}
-
static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
{
return 0;
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h
index 18b3731..e9f7c81 100644
--- a/arch/microblaze/include/asm/dma-mapping.h
+++ b/arch/microblaze/include/asm/dma-mapping.h
@@ -138,11 +138,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
ops->free_coherent(dev, size, cpu_addr, dma_handle);
}
-static inline int dma_get_cache_alignment(void)
-{
- return L1_CACHE_BYTES;
-}
-
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index 664ba53..d724a15 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -62,13 +62,6 @@ dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline int
-dma_get_cache_alignment(void)
-{
- /* XXX Largest on any MIPS */
- return 128;
-}
-
extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
diff --git a/arch/mn10300/include/asm/dma-mapping.h b/arch/mn10300/include/asm/dma-mapping.h
index 4ed1522..8d452a6 100644
--- a/arch/mn10300/include/asm/dma-mapping.h
+++ b/arch/mn10300/include/asm/dma-mapping.h
@@ -161,12 +161,6 @@ int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline
-int dma_get_cache_alignment(void)
-{
- return 1 << L1_CACHE_SHIFT;
-}
-
#define dma_is_consistent(d) (1)
static inline
diff --git a/arch/parisc/include/asm/dma-mapping.h b/arch/parisc/include/asm/dma-mapping.h
index da69433..44d3f62 100644
--- a/arch/parisc/include/asm/dma-mapping.h
+++ b/arch/parisc/include/asm/dma-mapping.h
@@ -185,12 +185,6 @@ dma_set_mask(struct device *dev, u64 mask)
}
static inline int
-dma_get_cache_alignment(void)
-{
- return dcache_stride;
-}
-
-static inline int
dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
{
return (hppa_dma_ops->dma_sync_single_for_cpu == NULL);
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index c85ef23..a77ba28 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -215,21 +215,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
#define dma_is_consistent(d, h) (1)
#endif
-static inline int dma_get_cache_alignment(void)
-{
-#ifdef CONFIG_PPC64
- /* no easy way to get cache size on all processors, so return
- * the maximum possible, to be safe */
- return (1 << INTERNODE_CACHE_SHIFT);
-#else
- /*
- * Each processor family will define its own L1_CACHE_SHIFT,
- * L1_CACHE_BYTES wraps to this, so this is always safe.
- */
- return L1_CACHE_BYTES;
-#endif
-}
-
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index bea3337..6bb5cc9 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -48,15 +48,6 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
#define dma_is_consistent(d, h) (0)
#endif
-static inline int dma_get_cache_alignment(void)
-{
- /*
- * Each processor family will define its own L1_CACHE_SHIFT,
- * L1_CACHE_BYTES wraps to this, so this is always safe.
- */
- return L1_CACHE_BYTES;
-}
-
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 4b4a0c0..74db853 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -52,15 +52,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return (dma_addr == DMA_ERROR_CODE);
}
-static inline int dma_get_cache_alignment(void)
-{
- /*
- * no easy way to get cache size on all processors, so return
- * the maximum possible, to be safe
- */
- return (1 << INTERNODE_CACHE_SHIFT);
-}
-
static inline int dma_set_mask(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
index cf466b3..1326b91 100644
--- a/arch/tile/include/asm/dma-mapping.h
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -90,13 +90,6 @@ dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline int
-dma_get_cache_alignment(void)
-{
- return L2_CACHE_BYTES;
-}
-
#define dma_is_consistent(d, h) (1)
-
#endif /* _ASM_TILE_DMA_MAPPING_H */
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index ac91eed..f9c67e8 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -87,13 +87,6 @@ dma_cache_sync(struct device *dev, void *vaddr, size_t size,
flush_write_buffers();
}
-static inline int dma_get_cache_alignment(void)
-{
- /* no easy way to get cache size on all x86, so return the
- * maximum possible, to be safe */
- return boot_cpu_data.x86_clflush_size;
-}
-
static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
gfp_t gfp)
{
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
index 51882ae..7104f2f 100644
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ b/arch/xtensa/include/asm/dma-mapping.h
@@ -161,12 +161,6 @@ dma_set_mask(struct device *dev, u64 mask)
return 0;
}
-static inline int
-dma_get_cache_alignment(void)
-{
- return L1_CACHE_BYTES;
-}
-
#define dma_is_consistent(d, h) (1)
static inline void
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 89b7e1a..e0670a5 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -142,6 +142,14 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
+static inline int dma_get_cache_alignment(void)
+{
+#ifdef ARCH_DMA_MINALIGN
+ return ARCH_DMA_MINALIGN;
+#endif
+ return 1;
+}
+
/* flags for the coherent memory api */
#define DMA_MEMORY_MAP 0x01
#define DMA_MEMORY_IO 0x02
--
1.6.5
--
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