/*
* see if a mapped address was really a "safe" buffer and if so, copy
* the data from the safe buffer back to the unsafe buffer and free up
* the safe buffer. (basically return things back to the way they
* should be)
*/
void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, (void *) dma_addr, size, dir);
unmap_single(dev, dma_addr, size, dir);
}
static void dmabounce_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct safe_buffer *buf;
dev_dbg(dev, "%s(dma=%#x,size=%d,dir=%x)\n",
__func__, dma_addr, size, dir);
buf = find_safe_buffer_dev(dev, dma_addr, __func__);
if (!buf) {
arm_dma_ops.sync_single_for_cpu(dev, dma_addr, size, dir);
return;
}
unmap_single(dev, buf, size, dir);
}
/*
* see if a mapped address was really a "safe" buffer and if so, copy
* the data from the safe buffer back to the unsafe buffer and free up
* the safe buffer. (basically return things back to the way they
* should be)
*/
void __dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
struct safe_buffer *buf;
dev_dbg(dev, "%s(dma=%#x,size=%d,dir=%x)\n",
__func__, dma_addr, size, dir);
buf = find_safe_buffer_dev(dev, dma_addr, __func__);
if (!buf) {
__dma_page_dev_to_cpu(pfn_to_page(dma_to_pfn(dev, dma_addr)),
dma_addr & ~PAGE_MASK, size, dir);
return;
}
unmap_single(dev, buf, size, dir);
}
void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
__func__, sg, nents, dir);
BUG_ON(dir == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
dma_addr_t dma_addr = sg->dma_address;
unsigned int length = sg->length;
unmap_single(dev, dma_addr, length, dir);
}
}
