From patchwork Thu Jan 16 08:53:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vignesh Raghavendra X-Patchwork-Id: 239650 List-Id: U-Boot discussion From: vigneshr at ti.com (Vignesh Raghavendra) Date: Thu, 16 Jan 2020 14:23:45 +0530 Subject: [PATCH v2 1/4] asm: dma-mapping.h: Fix dma mapping functions In-Reply-To: <20200116085348.24031-1-vigneshr@ti.com> References: <20200116085348.24031-1-vigneshr@ti.com> Message-ID: <20200116085348.24031-2-vigneshr@ti.com> Subsystems such as USB expect dma_map_single() and dma_unmap_single() to do dcache flush/invalidate operations as required. For example, see see drivers/usb/gadget/udc/udc-core.c::usb_gadget_map_request(). Currently drivers do this locally, (see drivers/usb/dwc3/ep0.c, drivers/mtd/nand/raw/denali.c etc..) Update arch specific dma_map_single() and dma_unmap_single() APIs to do cache flush/invalidate operations, so that drivers need not implement them locally. Signed-off-by: Vignesh Raghavendra Reviewed-by: Masahiro Yamada Reviewed-by: Rick Chen --- arch/arm/include/asm/dma-mapping.h | 23 +++++++++++++++++++++-- arch/nds32/include/asm/dma-mapping.h | 23 +++++++++++++++++++++-- arch/riscv/include/asm/dma-mapping.h | 23 +++++++++++++++++++++-- arch/x86/include/asm/dma-mapping.h | 23 +++++++++++++++++++++-- 4 files changed, 84 insertions(+), 8 deletions(-) diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index fc5b8f634d54..d20703739fad 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -7,7 +7,11 @@ #ifndef __ASM_ARM_DMA_MAPPING_H #define __ASM_ARM_DMA_MAPPING_H +#include +#include +#include #include +#include #define dma_mapping_error(x, y) 0 @@ -25,12 +29,27 @@ static inline void dma_free_coherent(void *addr) static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, enum dma_data_direction dir) { - return (unsigned long)vaddr; + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir == DMA_FROM_DEVICE) + invalidate_dcache_range(addr, addr + len); + else + flush_dcache_range(addr, addr + len); + + return addr; } static inline void dma_unmap_single(volatile void *vaddr, size_t len, - unsigned long paddr) + enum dma_data_direction dir) { + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir != DMA_TO_DEVICE) + invalidate_dcache_range(addr, addr + len); } #endif /* __ASM_ARM_DMA_MAPPING_H */ diff --git a/arch/nds32/include/asm/dma-mapping.h b/arch/nds32/include/asm/dma-mapping.h index e6808dc84089..c8876ceadda6 100644 --- a/arch/nds32/include/asm/dma-mapping.h +++ b/arch/nds32/include/asm/dma-mapping.h @@ -6,7 +6,11 @@ #ifndef __ASM_NDS_DMA_MAPPING_H #define __ASM_NDS_DMA_MAPPING_H +#include +#include +#include #include +#include static void *dma_alloc_coherent(size_t len, unsigned long *handle) { @@ -17,12 +21,27 @@ static void *dma_alloc_coherent(size_t len, unsigned long *handle) static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, enum dma_data_direction dir) { - return (unsigned long)vaddr; + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir == DMA_FROM_DEVICE) + invalidate_dcache_range(addr, addr + len); + else + flush_dcache_range(addr, addr + len); + + return addr; } static inline void dma_unmap_single(volatile void *vaddr, size_t len, - unsigned long paddr) + enum dma_data_direction dir) { + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir != DMA_TO_DEVICE) + invalidate_dcache_range(addr, addr + len); } #endif /* __ASM_NDS_DMA_MAPPING_H */ diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h index 3d930c90eceb..6cc39469590a 100644 --- a/arch/riscv/include/asm/dma-mapping.h +++ b/arch/riscv/include/asm/dma-mapping.h @@ -9,7 +9,11 @@ #ifndef __ASM_RISCV_DMA_MAPPING_H #define __ASM_RISCV_DMA_MAPPING_H +#include +#include +#include #include +#include #define dma_mapping_error(x, y) 0 @@ -27,12 +31,27 @@ static inline void dma_free_coherent(void *addr) static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, enum dma_data_direction dir) { - return (unsigned long)vaddr; + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir == DMA_FROM_DEVICE) + invalidate_dcache_range(addr, addr + len); + else + flush_dcache_range(addr, addr + len); + + return addr; } static inline void dma_unmap_single(volatile void *vaddr, size_t len, - unsigned long paddr) + enum dma_data_direction dir) { + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir != DMA_TO_DEVICE) + invalidate_dcache_range(addr, addr + len); } #endif /* __ASM_RISCV_DMA_MAPPING_H */ diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index b353ff0bef59..900b99b8a69a 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -7,7 +7,11 @@ #ifndef __ASM_X86_DMA_MAPPING_H #define __ASM_X86_DMA_MAPPING_H +#include +#include +#include #include +#include #define dma_mapping_error(x, y) 0 @@ -25,12 +29,27 @@ static inline void dma_free_coherent(void *addr) static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, enum dma_data_direction dir) { - return (unsigned long)vaddr; + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir == DMA_FROM_DEVICE) + invalidate_dcache_range(addr, addr + len); + else + flush_dcache_range(addr, addr + len); + + return addr; } static inline void dma_unmap_single(volatile void *vaddr, size_t len, - unsigned long paddr) + enum dma_data_direction dir) { + unsigned long addr = (unsigned long)vaddr; + + len = ALIGN(len, ARCH_DMA_MINALIGN); + + if (dir != DMA_TO_DEVICE) + invalidate_dcache_range(addr, addr + len); } #endif /* __ASM_X86_DMA_MAPPING_H */