1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Texas Instruments Incorporated, <www.ti.com>
11 * enum dma_direction - dma transfer direction indicator
12 * @DMA_MEM_TO_MEM: Memcpy mode
13 * @DMA_MEM_TO_DEV: From Memory to Device
14 * @DMA_DEV_TO_MEM: From Device to Memory
15 * @DMA_DEV_TO_DEV: From Device to Device
24 #define DMA_SUPPORTS_MEM_TO_MEM BIT(0)
25 #define DMA_SUPPORTS_MEM_TO_DEV BIT(1)
26 #define DMA_SUPPORTS_DEV_TO_MEM BIT(2)
27 #define DMA_SUPPORTS_DEV_TO_DEV BIT(3)
30 * struct dma_dev_priv - information about a device used by the uclass
32 * @supported: mode of transfers that DMA can support, should be
33 * one/multiple of DMA_SUPPORTS_*
40 * dma_get_device - get a DMA device which supports transfer
41 * type of transfer_type
43 * @transfer_type - transfer type should be one/multiple of
45 * @devp - udevice pointer to return the found device
46 * @return - will return on success and devp will hold the
47 * pointer to the device
49 int dma_get_device(u32 transfer_type, struct udevice **devp);
52 * dma_memcpy - try to use DMA to do a mem copy which will be
53 * much faster than CPU mem copy
55 * @dst - destination pointer
56 * @src - souce pointer
57 * @len - data length to be copied
58 * @return - on successful transfer returns no of bytes
59 transferred and on failure return error code.
61 int dma_memcpy(void *dst, void *src, size_t len);