From 6894258eda2f9badc28c878086c0e54bd5b7fb30 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Sep 2015 15:39:39 -0700 Subject: dma-mapping: consolidate dma_{alloc,free}_{attrs,coherent} Since 2009 we have a nice asm-generic header implementing lots of DMA API functions for architectures using struct dma_map_ops, but unfortunately it's still missing a lot of APIs that all architectures still have to duplicate. This series consolidates the remaining functions, although we still need arch opt outs for two of them as a few architectures have very non-standard implementations. This patch (of 5): The coherent DMA allocator works the same over all architectures supporting dma_map operations. This patch consolidates them and converges the minor differences: - the debug_dma helpers are now called from all architectures, including those that were previously missing them - dma_alloc_from_coherent and dma_release_from_coherent are now always called from the generic alloc/free routines instead of the ops dma-mapping-common.h always includes dma-coherent.h to get the defintions for them, or the stubs if the architecture doesn't support this feature - checks for ->alloc / ->free presence are removed. There is only one magic instead of dma_map_ops without them (mic_dma_ops) and that one is x86 only anyway. Besides that only x86 needs special treatment to replace a default devices if none is passed and tweak the gfp_flags. An optional arch hook is provided for that. [linux@roeck-us.net: fix build] [jcmvbkbc@gmail.com: fix xtensa] Signed-off-by: Christoph Hellwig Cc: Arnd Bergmann Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Yoshinori Sato Cc: Michal Simek Cc: Jonas Bonn Cc: Chris Metcalf Cc: Guan Xuetao Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Andy Shevchenko Signed-off-by: Guenter Roeck Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/include/asm/dma-mapping.h | 33 --------------------------------- 1 file changed, 33 deletions(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 710f60e380e0..e6ca63ac4c6c 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -137,39 +137,6 @@ 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); -#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) - -static inline void *dma_alloc_attrs(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag, - struct dma_attrs *attrs) -{ - struct dma_map_ops *dma_ops = get_dma_ops(dev); - void *cpu_addr; - - BUG_ON(!dma_ops); - - cpu_addr = dma_ops->alloc(dev, size, dma_handle, flag, attrs); - - debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); - - return cpu_addr; -} - -#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) - -static inline void dma_free_attrs(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_handle, - struct dma_attrs *attrs) -{ - struct dma_map_ops *dma_ops = get_dma_ops(dev); - - BUG_ON(!dma_ops); - - debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); - - dma_ops->free(dev, size, cpu_addr, dma_handle, attrs); -} - static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { struct dma_map_ops *dma_ops = get_dma_ops(dev); -- cgit v1.2.1 From 1e8937526e2309d48fccd81bb30a590ac21a5516 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Sep 2015 15:39:42 -0700 Subject: 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 Cc: Arnd Bergmann Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Yoshinori Sato Cc: Michal Simek Cc: Jonas Bonn Cc: Chris Metcalf Cc: Guan Xuetao Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Andy Shevchenko Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/include/asm/dma-mapping.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index e6ca63ac4c6c..7971b421c677 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -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, -- cgit v1.2.1 From efa21e432c7b3c8ae976039d614a017799b6e874 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Sep 2015 15:39:46 -0700 Subject: 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 Cc: Arnd Bergmann Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Yoshinori Sato Cc: Michal Simek Cc: Jonas Bonn Cc: Chris Metcalf Cc: Guan Xuetao Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Andy Shevchenko Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/include/asm/dma-mapping.h | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 7971b421c677..712d5afc055a 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -18,7 +18,9 @@ #include #include +#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 -- cgit v1.2.1 From ee196371d5cb1942ebdccc16bdce389812aa265e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Sep 2015 15:39:49 -0700 Subject: dma-mapping: consolidate dma_supported Most architectures just call into ->dma_supported, but some also return 1 if the method is not present, or 0 if no dma ops are present (although that should never happeb). Consolidate this more broad version into common code. Also fix h8300 which inorrectly always returned 0, which would have been a problem if it's dma_set_mask implementation wasn't a similarly buggy noop. As a few architectures have much more elaborate implementations, we still allow for arch overrides. [jcmvbkbc@gmail.com: fix xtensa] Signed-off-by: Christoph Hellwig Cc: Arnd Bergmann Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Yoshinori Sato Cc: Michal Simek Cc: Jonas Bonn Cc: Chris Metcalf Cc: Guan Xuetao Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Andy Shevchenko Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/include/asm/dma-mapping.h | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 712d5afc055a..dd43e0c6f219 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -124,17 +124,6 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off) #include -static inline int dma_supported(struct device *dev, u64 mask) -{ - struct dma_map_ops *dma_ops = get_dma_ops(dev); - - if (unlikely(dma_ops == NULL)) - return 0; - if (dma_ops->dma_supported == NULL) - return 1; - return dma_ops->dma_supported(dev, mask); -} - 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); -- cgit v1.2.1 From 452e06af1f0149b01201f94264d452cd7a95db7a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Sep 2015 15:39:53 -0700 Subject: dma-mapping: consolidate dma_set_mask Almost everyone implements dma_set_mask the same way, although some time that's hidden in ->set_dma_mask methods. This patch consolidates those into a common implementation that either calls ->set_dma_mask if present or otherwise uses the default implementation. Some architectures used to only call ->set_dma_mask after the initial checks, and those instance have been fixed to do the full work. h8300 implemented dma_set_mask bogusly as a no-ops and has been fixed. Unfortunately some architectures overload unrelated semantics like changing the dma_ops into it so we still need to allow for an architecture override for now. [jcmvbkbc@gmail.com: fix xtensa] Signed-off-by: Christoph Hellwig Cc: Arnd Bergmann Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Yoshinori Sato Cc: Michal Simek Cc: Jonas Bonn Cc: Chris Metcalf Cc: Guan Xuetao Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Andy Shevchenko Signed-off-by: Max Filippov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/include/asm/dma-mapping.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index dd43e0c6f219..7f522c021dc3 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -122,9 +122,11 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off) /* this will be removed soon */ #define flush_write_buffers() +#define HAVE_ARCH_DMA_SET_MASK 1 +extern int dma_set_mask(struct device *dev, u64 dma_mask); + #include -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); -- cgit v1.2.1