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dma-mapping: consolidate dma_{alloc,free}_noncoherent 

Most architectures do not support non-coherent allocations and either
define dma_{alloc,free}_noncoherent to their coherent versions or stub
them out.

Openrisc uses dma_{alloc,free}_attrs to implement them, and only Mips
implements them directly.

This patch moves the Openrisc version to common code, and handles the
DMA_ATTR_NON_CONSISTENT case in the mips dma_map_ops instance.

Note that actual non-coherent allocations require a dma_cache_sync
implementation, so if non-coherent allocations didn't work on
an architecture before this patch they still won't work after it.

[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2015-09-09 15:39:42 -07:00 committed by Linus Torvalds
parent 6894258eda
commit 1e8937526e
19 changed files with 39 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/alpha/include/asm/dma-mapping.h
View File

@ -27,9 +27,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return get_dma_ops(dev)->set_dma_mask(dev, mask);
}
#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_cache_sync(dev, va, size, dir) ((void)0)
#endif /* _ALPHA_DMA_MAPPING_H */

21
arch/arm/include/asm/dma-mapping.h
View File

@ -38,6 +38,12 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
dev->archdata.dma_ops = ops;
}
/*
* Note that while the generic code provides dummy dma_{alloc,free}_noncoherent
* implementations, we don't provide a dma_cache_sync function so drivers using
* this API are highlighted with build warnings.
*/
#include <asm-generic/dma-mapping-common.h>
static inline int dma_set_mask(struct device *dev, u64 mask)
@ -175,21 +181,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return dma_addr == DMA_ERROR_CODE;
}
/*
* Dummy noncoherent implementation. We don't provide a dma_cache_sync
* function so drivers using this API are highlighted with build warnings.
*/
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp)
{
return NULL;
}
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t handle)
{
}
extern int dma_supported(struct device *dev, u64 mask);
extern int arm_dma_set_mask(struct device *dev, u64 dma_mask);

14
arch/arm64/include/asm/dma-mapping.h
View File

@ -118,19 +118,5 @@ static inline void dma_mark_clean(void *addr, size_t size)
{
}
/*
* There is no dma_cache_sync() implementation, so just return NULL here.
*/
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t flags)
{
return NULL;
}
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t handle)
{
}
#endif /* __KERNEL__ */
#endif /* __ASM_DMA_MAPPING_H */

3
arch/h8300/include/asm/dma-mapping.h
View File

@ -20,9 +20,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
#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)
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;

3
arch/hexagon/include/asm/dma-mapping.h
View File

@ -34,9 +34,6 @@ extern int bad_dma_address;
extern struct dma_map_ops *dma_ops;
#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)
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
if (unlikely(dev == NULL))

3
arch/ia64/include/asm/dma-mapping.h
View File

@ -23,9 +23,6 @@ extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
#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 get_dma_ops(dev) platform_dma_get_ops(dev)
#include <asm-generic/dma-mapping-common.h>

3
arch/microblaze/include/asm/dma-mapping.h
View File

@ -98,9 +98,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return (dma_addr == DMA_ERROR_CODE);
}
#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)
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{

6
arch/mips/include/asm/dma-mapping.h
View File

@ -64,10 +64,4 @@ dma_set_mask(struct device *dev, u64 mask)
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
void dma_free_noncoherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
#endif /* _ASM_DMA_MAPPING_H */

20
arch/mips/mm/dma-default.c
View File

@ -112,7 +112,7 @@ static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
return gfp | dma_flag;
}
void *dma_alloc_noncoherent(struct device *dev, size_t size,
static void *mips_dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
@ -128,7 +128,6 @@ void *dma_alloc_noncoherent(struct device *dev, size_t size,
return ret;
}
EXPORT_SYMBOL(dma_alloc_noncoherent);
static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
@ -137,6 +136,13 @@ static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
struct page *page = NULL;
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
/*
* XXX: seems like the coherent and non-coherent implementations could
* be consolidated.
*/
if (dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs))
return mips_dma_alloc_noncoherent(dev, size, dma_handle, gfp);
gfp = massage_gfp_flags(dev, gfp);
if (IS_ENABLED(CONFIG_DMA_CMA) && !(gfp & GFP_ATOMIC))
@ -161,13 +167,12 @@ static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
}
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
static void mips_dma_free_noncoherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
free_pages((unsigned long) vaddr, get_order(size));
}
EXPORT_SYMBOL(dma_free_noncoherent);
static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
@ -176,6 +181,11 @@ static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct page *page = NULL;
if (dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
mips_dma_free_noncoherent(dev, size, vaddr, dma_handle);
return;
}
plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
if (!plat_device_is_coherent(dev) && !hw_coherentio)

20
arch/openrisc/include/asm/dma-mapping.h
View File

@ -37,26 +37,6 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
#include <asm-generic/dma-mapping-common.h>
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
struct dma_attrs attrs;
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
}
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle)
{
struct dma_attrs attrs;
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
}
static inline int dma_supported(struct device *dev, u64 dma_mask)
{
/* Support 32 bit DMA mask exclusively */

3
arch/powerpc/include/asm/dma-mapping.h
View File

@ -177,9 +177,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
return daddr - get_dma_offset(dev);
}
#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 ARCH_HAS_DMA_MMAP_COHERENT
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

3
arch/s390/include/asm/dma-mapping.h
View File

@ -25,9 +25,6 @@ static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
{
}
#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)
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 mask)

3
arch/sh/include/asm/dma-mapping.h
View File

@ -38,9 +38,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir);
#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)
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);

3
arch/sparc/include/asm/dma-mapping.h
View File

@ -9,9 +9,6 @@
int dma_supported(struct device *dev, u64 mask);
#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)
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
{

3
arch/tile/include/asm/dma-mapping.h
View File

@ -116,9 +116,6 @@ dma_set_mask(struct device *dev, u64 mask)
return 0;
}
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL)
#define dma_free_noncoherent(d, s, v, h) dma_free_attrs(d, s, v, h, NULL)
/*
* dma_alloc_noncoherent() is #defined to return coherent memory,
* so there's no need to do any flushing here.

3
arch/unicore32/include/asm/dma-mapping.h
View File

@ -80,9 +80,6 @@ static inline int dma_set_mask(struct device *dev, u64 dma_mask)
return 0;
}
#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)
static inline void dma_cache_sync(struct device *dev, void *vaddr,
size_t size, enum dma_data_direction direction)
{

3
arch/x86/include/asm/dma-mapping.h
View File

@ -56,9 +56,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return (dma_addr == DMA_ERROR_CODE);
}
#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)
extern int dma_supported(struct device *hwdev, u64 mask);
extern int dma_set_mask(struct device *dev, u64 mask);

3
arch/xtensa/include/asm/dma-mapping.h
View File

@ -32,9 +32,6 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
#include <asm-generic/dma-mapping-common.h>
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL)
#define dma_free_noncoherent(d, s, v, h) dma_free_attrs(d, s, v, h, NULL)
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{

18
include/asm-generic/dma-mapping-common.h
View File

@ -295,4 +295,22 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
}
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
DEFINE_DMA_ATTRS(attrs);
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
}
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle)
{
DEFINE_DMA_ATTRS(attrs);
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
}
#endif