/*
* Allocate a writecombining region, in much the same way as
* dma_alloc_coherent above.
*/
void *
dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
{
return __dma_alloc(dev, size, handle, gfp,
pgprot_writecombine(pgprot_kernel),
__builtin_return_address(0));
}
/*
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space for SO write operation.
*/
void *
dma_alloc_so_coherent(struct device *dev, size_t size, dma_addr_t *handle,
gfp_t gfp)
{
void *memory;
return __dma_alloc(dev, size, handle, gfp,
pgprot_so_dmacoherent(pgprot_kernel));
}
/*
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space.
*/
void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
{
void *memory;
if (dma_alloc_from_coherent(dev, size, handle, &memory))
return memory;
return __dma_alloc(dev, size, handle, gfp,
pgprot_dmacoherent(pgprot_kernel),
__builtin_return_address(0));
}
void *dma_generic_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
struct dma_attrs *attrs)
{
return __dma_alloc(dev, size, dma_addr, flag, attrs, false);
}
/*
* Allocate a strongly ordered region, in much the same way as
* dma_alloc_coherent above.
*/
void *dma_alloc_stronglyordered(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp)
{
return __dma_alloc(dev, size, handle, gfp,
pgprot_stronglyordered(pgprot_kernel));
}