35 lines
826 B
C
35 lines
826 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_DMA_MAPPING_H
|
|
#define _LINUX_DMA_MAPPING_H
|
|
|
|
#ifdef CONFIG_HAS_DMA
|
|
# error Virtio userspace code does not support CONFIG_HAS_DMA
|
|
#endif
|
|
|
|
enum dma_data_direction {
|
|
DMA_BIDIRECTIONAL = 0,
|
|
DMA_TO_DEVICE = 1,
|
|
DMA_FROM_DEVICE = 2,
|
|
DMA_NONE = 3,
|
|
};
|
|
|
|
#define dma_alloc_coherent(d, s, hp, f) ({ \
|
|
void *__dma_alloc_coherent_p = kmalloc((s), (f)); \
|
|
*(hp) = (unsigned long)__dma_alloc_coherent_p; \
|
|
__dma_alloc_coherent_p; \
|
|
})
|
|
|
|
#define dma_free_coherent(d, s, p, h) kfree(p)
|
|
|
|
#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_mapping_error(...) (0)
|
|
|
|
#define dma_unmap_single(...) do { } while (0)
|
|
#define dma_unmap_page(...) do { } while (0)
|
|
|
|
#define dma_max_mapping_size(...) SIZE_MAX
|
|
|
|
#endif
|