dma-mapping: cosolidate dma_mapping_error

Currently there are three valid implementations of dma_mapping_error:

 (1) call ->mapping_error
 (2) check for a hardcoded error code
 (3) always return 0

This patch provides a common implementation that calls ->mapping_error
if present, then checks for DMA_ERROR_CODE if defined or otherwise
returns 0.

[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 15:39:46 -07:00 committed by Linus Torvalds
parent 1e8937526e
commit efa21e432c
18 changed files with 19 additions and 146 deletions

View File

@ -12,11 +12,6 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
#include <asm-generic/dma-mapping-common.h>
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return get_dma_ops(dev)->mapping_error(dev, dma_addr);
}
static inline int dma_supported(struct device *dev, u64 mask)
{
return get_dma_ops(dev)->dma_supported(dev, mask);

View File

@ -172,15 +172,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
static inline void dma_mark_clean(void *addr, size_t size) { }
/*
* DMA errors are defined by all-bits-set in the DMA address.
*/
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
debug_dma_mapping_error(dev, dma_addr);
return dma_addr == DMA_ERROR_CODE;
}
extern int dma_supported(struct device *dev, u64 mask);
extern int arm_dma_set_mask(struct device *dev, u64 dma_mask);

View File

@ -84,13 +84,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
return (phys_addr_t)dev_addr;
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dev_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dev_addr);
return ops->mapping_error(dev, dev_addr);
}
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);

View File

@ -20,9 +20,4 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
return 0;
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
#endif

View File

@ -31,6 +31,7 @@
struct device;
extern int bad_dma_address;
#define DMA_ERROR_CODE bad_dma_address
extern struct dma_map_ops *dma_ops;
@ -57,14 +58,4 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
return addr + size - 1 <= *dev->dma_mask;
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
if (dma_ops->mapping_error)
return dma_ops->mapping_error(dev, dma_addr);
return (dma_addr == bad_dma_address);
}
#endif

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@ -27,13 +27,6 @@ extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
#include <asm-generic/dma-mapping-common.h>
static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
debug_dma_mapping_error(dev, daddr);
return ops->mapping_error(dev, daddr);
}
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);

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@ -87,17 +87,6 @@ static inline void __dma_sync(unsigned long paddr,
}
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
return (dma_addr == DMA_ERROR_CODE);
}
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{

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@ -37,14 +37,6 @@ static inline int dma_supported(struct device *dev, u64 mask)
return ops->dma_supported(dev, mask);
}
static inline int dma_mapping_error(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, mask);
return ops->mapping_error(dev, mask);
}
static inline int
dma_set_mask(struct device *dev, u64 mask)
{

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@ -43,11 +43,6 @@ static inline int dma_supported(struct device *dev, u64 dma_mask)
return dma_mask == DMA_BIT_MASK(32);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
static inline int dma_set_mask(struct device *dev, u64 dma_mask)
{
if (!dev->dma_mask || !dma_supported(dev, dma_mask))

View File

@ -18,7 +18,9 @@
#include <asm/io.h>
#include <asm/swiotlb.h>
#ifdef CONFIG_PPC64
#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
#endif
/* Some dma direct funcs must be visible for use in other dma_ops */
extern void *__dma_direct_alloc_coherent(struct device *dev, size_t size,
@ -137,21 +139,6 @@ extern int dma_set_mask(struct device *dev, u64 dma_mask);
extern int __dma_set_mask(struct device *dev, u64 dma_mask);
extern u64 __dma_get_required_mask(struct device *dev);
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
if (dma_ops->mapping_error)
return dma_ops->mapping_error(dev, dma_addr);
#ifdef CONFIG_PPC64
return (dma_addr == DMA_ERROR_CODE);
#else
return 0;
#endif
}
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
#ifdef CONFIG_SWIOTLB

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@ -43,14 +43,4 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
return addr + size - 1 <= *dev->dma_mask;
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
if (dma_ops->mapping_error)
return dma_ops->mapping_error(dev, dma_addr);
return dma_addr == DMA_ERROR_CODE;
}
#endif /* _ASM_S390_DMA_MAPPING_H */

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@ -9,6 +9,8 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
return dma_ops;
}
#define DMA_ERROR_CODE 0
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 mask)
@ -38,17 +40,6 @@ 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);
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
return dma_addr == 0;
}
/* 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,

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@ -38,12 +38,6 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
#include <asm-generic/dma-mapping-common.h>
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
debug_dma_mapping_error(dev, dma_addr);
return (dma_addr == DMA_ERROR_CODE);
}
static inline int dma_set_mask(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI

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@ -74,13 +74,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
return addr + size - 1 <= *dev->dma_mask;
}
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
debug_dma_mapping_error(dev, dma_addr);
return get_dma_ops(dev)->mapping_error(dev, dma_addr);
}
static inline int
dma_supported(struct device *dev, u64 mask)
{

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@ -38,16 +38,6 @@ static inline int dma_supported(struct device *dev, u64 mask)
return dma_ops->dma_supported(dev, mask);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
if (dma_ops->mapping_error)
return dma_ops->mapping_error(dev, dma_addr);
return 0;
}
#include <asm-generic/dma-mapping-common.h>
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)

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@ -45,17 +45,6 @@ bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp);
#include <asm-generic/dma-mapping-common.h>
/* Make sure we keep the same behaviour */
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
return (dma_addr == DMA_ERROR_CODE);
}
extern int dma_supported(struct device *hwdev, u64 mask);
extern int dma_set_mask(struct device *dev, u64 mask);

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@ -32,15 +32,6 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
#include <asm-generic/dma-mapping-common.h>
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, dma_addr);
return ops->mapping_error(dev, dma_addr);
}
static inline int
dma_supported(struct device *dev, u64 mask)
{

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@ -313,4 +313,18 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size,
dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
}
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
debug_dma_mapping_error(dev, dma_addr);
if (get_dma_ops(dev)->mapping_error)
return get_dma_ops(dev)->mapping_error(dev, dma_addr);
#ifdef DMA_ERROR_CODE
return dma_addr == DMA_ERROR_CODE;
#else
return 0;
#endif
}
#endif