linux-4.4.1/arm_dma_map_page()
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開始行:
*参照元 [#b530b954]
#backlinks
*説明 [#reb4110c]
-パス: [[linux-4.4.1/arch/arm/mm/dma-mapping.c]]
-FIXME: これは何?
--説明
**引数 [#v63a0727]
-struct device *dev
--
--[[linux-4.4.1/device]]
-struct page *page
--
--[[linux-4.4.1/page]]
-unsigned long offset
--
-size_t size
--
-enum dma_data_direction dir
--
--[[linux-4.4.1/dma_data_direction]]
-struct dma_attrs *attrs
--
--[[linux-4.4.1/dma_attrs]]
**返り値 [#x2cc9783]
-dma_addr_t
--
**参考 [#ha37440b]
*実装 [#m6796325]
/**
* arm_dma_map_page - map a portion of a page for stream...
* @dev: valid struct device pointer, or NULL for ISA an...
* @page: page that buffer resides in
* @offset: offset into page for start of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriate...
* or written back.
*
* The device owns this memory once this call has comple...
* can regain ownership by calling dma_unmap_page().
*/
static dma_addr_t arm_dma_map_page(struct device *dev, s...
unsigned long offset, size_t size, enum dma...
struct dma_attrs *attrs)
{
if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
__dma_page_cpu_to_dev(page, offset, size...
-
--[[linux-4.4.1/dma_get_attr()]]
--[[linux-4.4.1/__dma_page_cpu_to_dev()]]
return pfn_to_dma(dev, page_to_pfn(page)) + offs...
-
--[[linux-4.4.1/pfn_to_dma()]]
--[[linux-4.4.1/page_to_pfn()]]
}
*コメント [#de3475a5]
終了行:
*参照元 [#b530b954]
#backlinks
*説明 [#reb4110c]
-パス: [[linux-4.4.1/arch/arm/mm/dma-mapping.c]]
-FIXME: これは何?
--説明
**引数 [#v63a0727]
-struct device *dev
--
--[[linux-4.4.1/device]]
-struct page *page
--
--[[linux-4.4.1/page]]
-unsigned long offset
--
-size_t size
--
-enum dma_data_direction dir
--
--[[linux-4.4.1/dma_data_direction]]
-struct dma_attrs *attrs
--
--[[linux-4.4.1/dma_attrs]]
**返り値 [#x2cc9783]
-dma_addr_t
--
**参考 [#ha37440b]
*実装 [#m6796325]
/**
* arm_dma_map_page - map a portion of a page for stream...
* @dev: valid struct device pointer, or NULL for ISA an...
* @page: page that buffer resides in
* @offset: offset into page for start of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriate...
* or written back.
*
* The device owns this memory once this call has comple...
* can regain ownership by calling dma_unmap_page().
*/
static dma_addr_t arm_dma_map_page(struct device *dev, s...
unsigned long offset, size_t size, enum dma...
struct dma_attrs *attrs)
{
if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
__dma_page_cpu_to_dev(page, offset, size...
-
--[[linux-4.4.1/dma_get_attr()]]
--[[linux-4.4.1/__dma_page_cpu_to_dev()]]
return pfn_to_dma(dev, page_to_pfn(page)) + offs...
-
--[[linux-4.4.1/pfn_to_dma()]]
--[[linux-4.4.1/page_to_pfn()]]
}
*コメント [#de3475a5]
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