1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 struct device;
17  * buffer device info
21 	struct device *dev;		/* generic device */
24 #define snd_dma_continuous_data(x)	((struct device *)(__force unsigned long)(x))
31 #define SNDRV_DMA_TYPE_CONTINUOUS	1	/* continuous no-DMA memory */
32 #define SNDRV_DMA_TYPE_DEV		2	/* generic device continuous */
33 #define SNDRV_DMA_TYPE_DEV_UC		5	/* continuous non-cahced */
35 #define SNDRV_DMA_TYPE_DEV_SG		3	/* generic device SG-buffer */
36 #define SNDRV_DMA_TYPE_DEV_UC_SG	6	/* SG non-cached */
38 #define SNDRV_DMA_TYPE_DEV_SG	SNDRV_DMA_TYPE_DEV /* no SG-buf support */
42 #define SNDRV_DMA_TYPE_DEV_IRAM		4	/* generic device iram-buffer */
52 	struct snd_dma_device dev;	/* device type */
54 	dma_addr_t addr;	/* physical address */  member
64 	return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;  in snd_sgbuf_aligned_pages()
69  * Scatter-Gather generic device pages
71 void *snd_malloc_sgbuf_pages(struct device *device,
78 	dma_addr_t addr;  member
87 	struct device *dev;
96 	struct snd_sg_buf *sgbuf = dmab->private_data;  in snd_sgbuf_get_addr()
97 	dma_addr_t addr;  in snd_sgbuf_get_addr()  local
100 		return dmab->addr + offset;  in snd_sgbuf_get_addr()
101 	addr = sgbuf->table[offset >> PAGE_SHIFT].addr;  in snd_sgbuf_get_addr()
102 	addr &= ~((dma_addr_t)PAGE_SIZE - 1);  in snd_sgbuf_get_addr()
103 	return addr + offset % PAGE_SIZE;  in snd_sgbuf_get_addr()
112 	struct snd_sg_buf *sgbuf = dmab->private_data;  in snd_sgbuf_get_ptr()
115 		return dmab->area + offset;  in snd_sgbuf_get_ptr()
116 	return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;  in snd_sgbuf_get_ptr()
122 /* non-SG versions */
126 	return dmab->addr + offset;  in snd_sgbuf_get_addr()
132 	return dmab->area + offset;  in snd_sgbuf_get_ptr()
140 int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
142 int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size,