359 lines
10 KiB
C
359 lines
10 KiB
C
#ifndef _ASM_GENERIC_DMA_MAPPING_H
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#define _ASM_GENERIC_DMA_MAPPING_H
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#include <linux/kmemcheck.h>
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#include <linux/bug.h>
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#include <linux/scatterlist.h>
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#include <linux/dma-debug.h>
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#include <linux/dma-attrs.h>
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#include <asm-generic/dma-coherent.h>
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static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
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size_t size,
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enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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dma_addr_t addr;
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kmemcheck_mark_initialized(ptr, size);
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BUG_ON(!valid_dma_direction(dir));
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addr = ops->map_page(dev, virt_to_page(ptr),
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(unsigned long)ptr & ~PAGE_MASK, size,
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dir, attrs);
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debug_dma_map_page(dev, virt_to_page(ptr),
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(unsigned long)ptr & ~PAGE_MASK, size,
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dir, addr, true);
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return addr;
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}
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static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
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size_t size,
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enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->unmap_page)
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ops->unmap_page(dev, addr, size, dir, attrs);
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debug_dma_unmap_page(dev, addr, size, dir, true);
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}
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/*
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* dma_maps_sg_attrs returns 0 on error and > 0 on success.
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* It should never return a value < 0.
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*/
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static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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int i, ents;
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struct scatterlist *s;
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for_each_sg(sg, s, nents, i)
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kmemcheck_mark_initialized(sg_virt(s), s->length);
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BUG_ON(!valid_dma_direction(dir));
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ents = ops->map_sg(dev, sg, nents, dir, attrs);
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BUG_ON(ents < 0);
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debug_dma_map_sg(dev, sg, nents, ents, dir);
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return ents;
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}
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static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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debug_dma_unmap_sg(dev, sg, nents, dir);
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if (ops->unmap_sg)
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ops->unmap_sg(dev, sg, nents, dir, attrs);
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}
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static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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dma_addr_t addr;
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kmemcheck_mark_initialized(page_address(page) + offset, size);
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BUG_ON(!valid_dma_direction(dir));
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addr = ops->map_page(dev, page, offset, size, dir, NULL);
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debug_dma_map_page(dev, page, offset, size, dir, addr, false);
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return addr;
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}
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static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->unmap_page)
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ops->unmap_page(dev, addr, size, dir, NULL);
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debug_dma_unmap_page(dev, addr, size, dir, false);
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}
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static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
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size_t size,
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enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_single_for_cpu)
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ops->sync_single_for_cpu(dev, addr, size, dir);
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debug_dma_sync_single_for_cpu(dev, addr, size, dir);
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t addr, size_t size,
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enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_single_for_device)
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ops->sync_single_for_device(dev, addr, size, dir);
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debug_dma_sync_single_for_device(dev, addr, size, dir);
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}
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static inline void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t addr,
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unsigned long offset,
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size_t size,
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enum dma_data_direction dir)
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{
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const struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_single_for_cpu)
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ops->sync_single_for_cpu(dev, addr + offset, size, dir);
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debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
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}
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static inline void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t addr,
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unsigned long offset,
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size_t size,
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enum dma_data_direction dir)
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{
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const struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_single_for_device)
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ops->sync_single_for_device(dev, addr + offset, size, dir);
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debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_sg_for_cpu)
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ops->sync_sg_for_cpu(dev, sg, nelems, dir);
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debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
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}
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static inline void
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dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction dir)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!valid_dma_direction(dir));
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if (ops->sync_sg_for_device)
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ops->sync_sg_for_device(dev, sg, nelems, dir);
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debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
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}
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#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
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#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
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#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
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#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
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extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size);
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void *dma_common_contiguous_remap(struct page *page, size_t size,
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unsigned long vm_flags,
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pgprot_t prot, const void *caller);
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void *dma_common_pages_remap(struct page **pages, size_t size,
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unsigned long vm_flags, pgprot_t prot,
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const void *caller);
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void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags);
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/**
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* dma_mmap_attrs - map a coherent DMA allocation into user space
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* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
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* @vma: vm_area_struct describing requested user mapping
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* @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
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* @handle: device-view address returned from dma_alloc_attrs
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* @size: size of memory originally requested in dma_alloc_attrs
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* @attrs: attributes of mapping properties requested in dma_alloc_attrs
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*
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* Map a coherent DMA buffer previously allocated by dma_alloc_attrs
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* into user space. The coherent DMA buffer must not be freed by the
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* driver until the user space mapping has been released.
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*/
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static inline int
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dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,
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dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!ops);
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if (ops->mmap)
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return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
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return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
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}
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#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
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int
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dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr, size_t size);
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static inline int
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dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr,
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dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!ops);
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if (ops->get_sgtable)
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return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
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attrs);
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return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
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}
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#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
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#ifndef arch_dma_alloc_attrs
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#define arch_dma_alloc_attrs(dev, flag) (true)
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#endif
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static inline void *dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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void *cpu_addr;
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BUG_ON(!ops);
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if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
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return cpu_addr;
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if (!arch_dma_alloc_attrs(&dev, &flag))
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return NULL;
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if (!ops->alloc)
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return NULL;
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cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
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debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
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return cpu_addr;
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}
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static inline void dma_free_attrs(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle,
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struct dma_attrs *attrs)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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BUG_ON(!ops);
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WARN_ON(irqs_disabled());
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if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
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return;
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if (!ops->free)
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return;
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debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
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ops->free(dev, size, cpu_addr, dma_handle, attrs);
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}
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag)
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{
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return dma_alloc_attrs(dev, size, dma_handle, flag, NULL);
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
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}
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static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp)
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{
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DEFINE_DMA_ATTRS(attrs);
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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
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}
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static inline void dma_free_noncoherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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DEFINE_DMA_ATTRS(attrs);
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dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
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dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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debug_dma_mapping_error(dev, dma_addr);
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if (get_dma_ops(dev)->mapping_error)
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return get_dma_ops(dev)->mapping_error(dev, dma_addr);
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#ifdef DMA_ERROR_CODE
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return dma_addr == DMA_ERROR_CODE;
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#else
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return 0;
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#endif
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}
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#ifndef HAVE_ARCH_DMA_SUPPORTED
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (!ops)
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return 0;
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if (!ops->dma_supported)
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return 1;
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return ops->dma_supported(dev, mask);
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}
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#endif
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#ifndef HAVE_ARCH_DMA_SET_MASK
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (ops->set_dma_mask)
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return ops->set_dma_mask(dev, mask);
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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#endif
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#endif
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