diff options
Diffstat (limited to 'tools/virtio/linux/dma-mapping.h')
| -rw-r--r-- | tools/virtio/linux/dma-mapping.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/tools/virtio/linux/dma-mapping.h b/tools/virtio/linux/dma-mapping.h index f91aeb5fe571..095958461788 100644 --- a/tools/virtio/linux/dma-mapping.h +++ b/tools/virtio/linux/dma-mapping.h @@ -24,9 +24,36 @@ enum dma_data_direction { #define dma_map_page(d, p, o, s, dir) (page_to_phys(p) + (o)) #define dma_map_single(d, p, s, dir) (virt_to_phys(p)) +#define dma_map_single_attrs(d, p, s, dir, a) (virt_to_phys(p)) #define dma_mapping_error(...) (0) -#define dma_unmap_single(...) do { } while (0) -#define dma_unmap_page(...) do { } while (0) +#define dma_unmap_single(d, a, s, r) do { (void)(d); (void)(a); (void)(s); (void)(r); } while (0) +#define dma_unmap_page(d, a, s, r) do { (void)(d); (void)(a); (void)(s); (void)(r); } while (0) + +#define sg_dma_address(sg) (0) +#define sg_dma_len(sg) (0) +#define dma_need_sync(v, a) (0) +#define dma_unmap_single_attrs(d, a, s, r, t) do { \ + (void)(d); (void)(a); (void)(s); (void)(r); (void)(t); \ +} while (0) +#define dma_sync_single_range_for_cpu(d, a, o, s, r) do { \ + (void)(d); (void)(a); (void)(o); (void)(s); (void)(r); \ +} while (0) +#define dma_sync_single_range_for_device(d, a, o, s, r) do { \ + (void)(d); (void)(a); (void)(o); (void)(s); (void)(r); \ +} while (0) +#define dma_max_mapping_size(...) SIZE_MAX + +/* + * A dma_addr_t can hold any valid DMA or bus address for the platform. It can + * be given to a device to use as a DMA source or target. It is specific to a + * given device and there may be a translation between the CPU physical address + * space and the bus address space. + * + * DMA_MAPPING_ERROR is the magic error code if a mapping failed. It should not + * be used directly in drivers, but checked for using dma_mapping_error() + * instead. + */ +#define DMA_MAPPING_ERROR (~(dma_addr_t)0) #endif |
