linux-4.4.1/__swiotlb_mmap()
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開始行:
*参照元 [#qad10e11]
#backlinks
*説明 [#w60d2ceb]
-パス: [[linux-4.4.1/arch/arm64/mm/dma-mapping.c]]
-FIXME: これは何？
--説明
**引数 [#yabcff78]
-struct device *dev
--
--[[linux-4.4.1/device]]
-struct vm_area_struct *vma
--
--[[linux-4.4.1/vm_area_struct]]
-void *cpu_addr
--
-dma_addr_t dma_addr
--
--[[linux-4.4.1/dma_addr_t]]
-size_t size
--
-struct dma_attrs *attrs
--
--[[linux-4.4.1/dma_attrs]]
**返り値 [#pf51406e]
-int
--
**参考 [#hba72796]
*実装 [#fd3dbc82]
static int __swiotlb_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
struct dma_attrs *attrs)
{
int ret = -ENXIO;
unsigned long nr_vma_pages = (vma->vm_end - vma->vm_sta...
PAGE_SHIFT;
unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_...
unsigned long off = vma->vm_pgoff;
-
--[[linux-4.4.1/PAGE_ALIGN()]]
--[[linux-4.4.1/dma_to_phys()]]
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_pag...
is_device_dma_coherent(dev));
-
--[[linux-4.4.1/__get_dma_pgprot()]]
--[[linux-4.4.1/is_device_dma_coherent()]]
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &r...
return ret;
-
--[[linux-4.4.1/dma_mmap_from_coherent()]]
if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
ret = remap_pfn_range(vma, vma->vm_start,
pfn + off,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
}
-
--[[linux-4.4.1/remap_pfn_range()]]
return ret;
}
*コメント [#qe2d308f]
終了行:
*参照元 [#qad10e11]
#backlinks
*説明 [#w60d2ceb]
-パス: [[linux-4.4.1/arch/arm64/mm/dma-mapping.c]]
-FIXME: これは何？
--説明
**引数 [#yabcff78]
-struct device *dev
--
--[[linux-4.4.1/device]]
-struct vm_area_struct *vma
--
--[[linux-4.4.1/vm_area_struct]]
-void *cpu_addr
--
-dma_addr_t dma_addr
--
--[[linux-4.4.1/dma_addr_t]]
-size_t size
--
-struct dma_attrs *attrs
--
--[[linux-4.4.1/dma_attrs]]
**返り値 [#pf51406e]
-int
--
**参考 [#hba72796]
*実装 [#fd3dbc82]
static int __swiotlb_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
struct dma_attrs *attrs)
{
int ret = -ENXIO;
unsigned long nr_vma_pages = (vma->vm_end - vma->vm_sta...
PAGE_SHIFT;
unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_...
unsigned long off = vma->vm_pgoff;
-
--[[linux-4.4.1/PAGE_ALIGN()]]
--[[linux-4.4.1/dma_to_phys()]]
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_pag...
is_device_dma_coherent(dev));
-
--[[linux-4.4.1/__get_dma_pgprot()]]
--[[linux-4.4.1/is_device_dma_coherent()]]
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &r...
return ret;
-
--[[linux-4.4.1/dma_mmap_from_coherent()]]
if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
ret = remap_pfn_range(vma, vma->vm_start,
pfn + off,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
}
-
--[[linux-4.4.1/remap_pfn_range()]]
return ret;
}
*コメント [#qe2d308f]
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