/* Allocates a contiguous real buffer and creates mappings over it.
* Returns the virtual address of the buffer and sets dma_handle
* to the dma address (mapping) of the first page.
*/
static void *pci_iommu_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
return iommu_alloc_coherent(device_to_table(hwdev), size, dma_handle,
device_to_mask(hwdev), flag,
pcibus_to_node(to_pci_dev(hwdev)->bus));
}
/* We support DMA to/from any memory page via the iommu */
static int ofdev_iommu_dma_supported(struct device *dev, u64 mask)
{
struct iommu_table *tbl = device_to_table(dev);
if (!tbl || tbl->it_offset > mask) {
printk(KERN_INFO "Warning: IOMMU table offset too big for device mask\n");
if (tbl)
printk(KERN_INFO "mask: 0x%08lx, table offset: 0x%08lx\n",
mask, tbl->it_offset);
else
printk(KERN_INFO "mask: 0x%08lx, table unavailable\n",
mask);
return 0;
} else
return 1;
}
static void ofdev_iommu_unmap_single(struct device *hwdev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
iommu_unmap_single(device_to_table(hwdev), dma_handle, size, direction);
}
/* Creates TCEs for a user provided buffer. The user buffer must be
* contiguous real kernel storage (not vmalloc). The address of the buffer
* passed here is the kernel (virtual) address of the buffer. The buffer
* need not be page aligned, the dma_addr_t returned will point to the same
* byte within the page as vaddr.
*/
static dma_addr_t ofdev_iommu_map_single(struct device *hwdev, void *vaddr,
size_t size, enum dma_data_direction direction)
{
return iommu_map_single(device_to_table(hwdev), vaddr, size,
device_to_mask(hwdev), direction);
}
static void ofdev_iommu_free_coherent(struct device *hwdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
iommu_free_coherent(device_to_table(hwdev), size, vaddr, dma_handle);
}
/* Allocates a contiguous real buffer and creates mappings over it.
* Returns the virtual address of the buffer and sets dma_handle
* to the dma address (mapping) of the first page.
*/
static void *ofdev_iommu_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
return iommu_alloc_coherent(device_to_table(hwdev), size, dma_handle,
device_to_mask(hwdev), flag, device_to_node(hwdev));
}
static void ofdev_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
iommu_unmap_sg(device_to_table(dev), sglist, nelems, direction);
}
static int ofdev_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
return iommu_map_sg(dev, device_to_table(dev), sglist,
nelems, device_to_mask(dev), direction);
}
