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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Merge branch 'pending-dma-streaming' (early part) into devel
This commit is contained in:
commit
2fc42814d8
6 changed files with 57 additions and 22 deletions
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@ -342,6 +342,22 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
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}
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EXPORT_SYMBOL(dma_map_single);
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/*
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* see if a mapped address was really a "safe" buffer and if so, copy
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* the data from the safe buffer back to the unsafe buffer and free up
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* the safe buffer. (basically return things back to the way they
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* should be)
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*/
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void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction dir)
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{
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dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
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__func__, (void *) dma_addr, size, dir);
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unmap_single(dev, dma_addr, size, dir);
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}
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EXPORT_SYMBOL(dma_unmap_single);
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dma_addr_t dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction dir)
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{
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@ -366,8 +382,7 @@ EXPORT_SYMBOL(dma_map_page);
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* the safe buffer. (basically return things back to the way they
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* should be)
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*/
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void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction dir)
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{
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dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
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@ -375,7 +390,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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unmap_single(dev, dma_addr, size, dir);
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}
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EXPORT_SYMBOL(dma_unmap_single);
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EXPORT_SYMBOL(dma_unmap_page);
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int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
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unsigned long off, size_t sz, enum dma_data_direction dir)
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@ -15,20 +15,15 @@
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* must not be used by drivers.
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*/
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#ifndef __arch_page_to_dma
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#if !defined(CONFIG_HIGHMEM)
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static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
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{
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return (dma_addr_t)__virt_to_bus((unsigned long)page_address(page));
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}
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#elif defined(__pfn_to_bus)
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static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
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{
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return (dma_addr_t)__pfn_to_bus(page_to_pfn(page));
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}
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#else
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#error "this machine class needs to define __arch_page_to_dma to use HIGHMEM"
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#endif
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static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
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{
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return pfn_to_page(__bus_to_pfn(addr));
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}
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static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
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{
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@ -45,6 +40,11 @@ static inline dma_addr_t page_to_dma(struct device *dev, struct page *page)
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return __arch_page_to_dma(dev, page);
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}
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static inline struct page *dma_to_page(struct device *dev, dma_addr_t addr)
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{
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return __arch_dma_to_page(dev, addr);
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}
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static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
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{
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return __arch_dma_to_virt(dev, addr);
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@ -257,9 +257,11 @@ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
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*/
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extern dma_addr_t dma_map_single(struct device *, void *, size_t,
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enum dma_data_direction);
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extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
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enum dma_data_direction);
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extern dma_addr_t dma_map_page(struct device *, struct page *,
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unsigned long, size_t, enum dma_data_direction);
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extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
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extern void dma_unmap_page(struct device *, dma_addr_t, size_t,
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enum dma_data_direction);
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/*
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@ -352,7 +354,6 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
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{
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/* nothing to do */
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}
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#endif /* CONFIG_DMABOUNCE */
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/**
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* dma_unmap_page - unmap a buffer previously mapped through dma_map_page()
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@ -371,8 +372,9 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
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static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir)
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{
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dma_unmap_single(dev, handle, size, dir);
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/* nothing to do */
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}
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#endif /* CONFIG_DMABOUNCE */
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/**
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* dma_sync_single_range_for_cpu
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@ -136,6 +136,12 @@
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#define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT)
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#define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
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/*
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* Convert a page to/from a physical address
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*/
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#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
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#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
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#ifndef __ASSEMBLY__
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/*
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@ -196,7 +202,8 @@ static inline void *phys_to_virt(unsigned long x)
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#ifndef __virt_to_bus
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#define __virt_to_bus __virt_to_phys
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#define __bus_to_virt __phys_to_virt
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#define __pfn_to_bus(x) ((x) << PAGE_SHIFT)
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#define __pfn_to_bus(x) __pfn_to_phys(x)
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#define __bus_to_pfn(x) __phys_to_pfn(x)
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#endif
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static inline __deprecated unsigned long virt_to_bus(void *x)
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@ -294,11 +301,6 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
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#endif /* !CONFIG_DISCONTIGMEM */
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/*
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* For BIO. "will die". Kill me when bio_to_phys() and bvec_to_phys() die.
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*/
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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/*
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* Optional coherency support. Currently used only by selected
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* Intel XSC3-based systems.
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@ -64,6 +64,8 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x)
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(dma_addr_t)page_to_phys(page); \
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})
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#define __arch_dma_to_page(dev, addr) phys_to_page(addr)
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#endif /* CONFIG_ARCH_IOP13XX */
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#endif /* !ASSEMBLY */
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@ -41,6 +41,13 @@ extern struct bus_type platform_bus_type;
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__dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
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__dma; })
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#define __arch_dma_to_page(dev, x) \
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({ dma_addr_t __dma = x; \
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if (!is_lbus_device(dev)) \
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__dma += PHYS_OFFSET - KS8695_PCIMEM_PA; \
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phys_to_page(__dma); \
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})
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#endif
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#endif
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@ -68,6 +68,13 @@
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__dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
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__dma; })
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#define __arch_dma_to_page(dev, addr) \
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({ dma_addr_t __dma = addr; \
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if (is_lbus_device(dev)) \
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__dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \
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phys_to_page(__dma); \
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})
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#define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \
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lbus_to_virt(addr) : \
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__phys_to_virt(addr)); })
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