void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_addr, unsigned long attrs)
{
if (!(attrs & DMA_ATTR_NON_CONSISTENT))
cpu_addr = (void *)CAC_ADDR((unsigned long)cpu_addr);
dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
}
void dma_direct_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs)
{
if (!dev_is_dma_coherent(dev))
arch_dma_free(dev, size, cpu_addr, dma_addr, attrs);
else
dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
}
void arch_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, unsigned long attrs)
{
if (!__free_from_pool(vaddr, PAGE_ALIGN(size))) {
void *kaddr = phys_to_virt(dma_to_phys(dev, dma_handle));
vunmap(vaddr);
dma_direct_free_pages(dev, size, kaddr, dma_handle, attrs);
}
}
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t flags, unsigned long attrs)
{
struct page *page;
void *ptr, *coherent_ptr;
pgprot_t prot = pgprot_writecombine(PAGE_KERNEL);
size = PAGE_ALIGN(size);
if (!gfpflags_allow_blocking(flags)) {
struct page *page = NULL;
void *addr = __alloc_from_pool(size, &page, flags);
if (addr)
*dma_handle = phys_to_dma(dev, page_to_phys(page));
return addr;
}
ptr = dma_direct_alloc_pages(dev, size, dma_handle, flags, attrs);
if (!ptr)
goto no_mem;
/* remove any dirty cache lines on the kernel alias */
__dma_flush_area(ptr, size);
/* create a coherent mapping */
page = virt_to_page(ptr);
coherent_ptr = dma_common_contiguous_remap(page, size, VM_USERMAP,
prot, __builtin_return_address(0));
if (!coherent_ptr)
goto no_map;
return coherent_ptr;
no_map:
dma_direct_free_pages(dev, size, ptr, *dma_handle, attrs);
no_mem:
return NULL;
}
