From 22456b97148be300e25e9cb97244656775972475 Mon Sep 17 00:00:00 2001 From: Glauber Costa Date: Tue, 25 Mar 2008 18:36:21 -0300 Subject: [PATCH] x86: implement dma_map_single through dma_ops That's already the name of the game for x86_64. For i386, we add a pci-base_32.c, that will hold the default operations. The function call itself goes through dma-mapping.h , the common header Signed-off-by: Glauber Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/Makefile | 1 + arch/x86/kernel/pci-base_32.c | 20 ++++++++++++++++++++ include/asm-x86/dma-mapping.h | 10 ++++++++++ include/asm-x86/dma-mapping_32.h | 10 ---------- include/asm-x86/dma-mapping_64.h | 9 --------- 5 files changed, 31 insertions(+), 19 deletions(-) create mode 100644 arch/x86/kernel/pci-base_32.c diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 7a2a2e93e8..edd5c54ffd 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -26,6 +26,7 @@ obj-y += pci-dma_$(BITS).o bootflag.o e820_$(BITS).o obj-y += quirks.o i8237.o topology.o kdebugfs.o obj-y += alternative.o i8253.o obj-$(CONFIG_X86_64) += pci-nommu_64.o bugs_64.o +obj-$(CONFIG_X86_32) += pci-base_32.o obj-y += tsc_$(BITS).o io_delay.o rtc.o obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c new file mode 100644 index 0000000000..b613d735f7 --- /dev/null +++ b/arch/x86/kernel/pci-base_32.c @@ -0,0 +1,20 @@ +#include +#include +#include +#include +#include + +static dma_addr_t pci32_map_single(struct device *dev, void *ptr, + size_t size, int direction) +{ + WARN_ON(size == 0); + flush_write_buffers(); + return virt_to_phys(ptr); +} + +static const struct dma_mapping_ops pci32_dma_ops = { + .map_single = pci32_map_single, +}; + +const struct dma_mapping_ops *dma_ops = &pci32_dma_ops; +EXPORT_SYMBOL(dma_ops); diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h index aebd178a19..d320244db8 100644 --- a/include/asm-x86/dma-mapping.h +++ b/include/asm-x86/dma-mapping.h @@ -50,10 +50,20 @@ struct dma_mapping_ops { int is_phys; }; +extern const struct dma_mapping_ops *dma_ops; + #ifdef CONFIG_X86_32 # include "dma-mapping_32.h" #else # include "dma-mapping_64.h" #endif +static inline dma_addr_t +dma_map_single(struct device *hwdev, void *ptr, size_t size, + int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + return dma_ops->map_single(hwdev, ptr, size, direction); +} + #endif diff --git a/include/asm-x86/dma-mapping_32.h b/include/asm-x86/dma-mapping_32.h index 55f01bd9e5..b496306d5e 100644 --- a/include/asm-x86/dma-mapping_32.h +++ b/include/asm-x86/dma-mapping_32.h @@ -17,16 +17,6 @@ void *dma_alloc_coherent(struct device *dev, size_t size, void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); -static inline dma_addr_t -dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(!valid_dma_direction(direction)); - WARN_ON(size == 0); - flush_write_buffers(); - return virt_to_phys(ptr); -} - static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction direction) diff --git a/include/asm-x86/dma-mapping_64.h b/include/asm-x86/dma-mapping_64.h index 369188a348..969a7da0cf 100644 --- a/include/asm-x86/dma-mapping_64.h +++ b/include/asm-x86/dma-mapping_64.h @@ -2,7 +2,6 @@ #define _X8664_DMA_MAPPING_H 1 extern dma_addr_t bad_dma_address; -extern const struct dma_mapping_ops* dma_ops; extern int iommu_merge; static inline int dma_mapping_error(dma_addr_t dma_addr) @@ -24,14 +23,6 @@ extern void *dma_alloc_coherent(struct device *dev, size_t size, extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); -static inline dma_addr_t -dma_map_single(struct device *hwdev, void *ptr, size_t size, - int direction) -{ - BUG_ON(!valid_dma_direction(direction)); - return dma_ops->map_single(hwdev, ptr, size, direction); -} - static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size, int direction) -- 2.39.5