11a59d1b8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 21da177e4SLinus Torvalds /* 3c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 41da177e4SLinus Torvalds * Takashi Iwai <tiwai@suse.de> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Generic memory allocators 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #ifndef __SOUND_MEMALLOC_H 101da177e4SLinus Torvalds #define __SOUND_MEMALLOC_H 111da177e4SLinus Torvalds 1283fbcaedSTakashi Iwai #include <asm/page.h> 1383fbcaedSTakashi Iwai 141da177e4SLinus Torvalds struct device; 15a202bd1aSTakashi Iwai struct vm_area_struct; 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds /* 181da177e4SLinus Torvalds * buffer device info 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds struct snd_dma_device { 211da177e4SLinus Torvalds int type; /* SNDRV_DMA_TYPE_XXX */ 221da177e4SLinus Torvalds struct device *dev; /* generic device */ 231da177e4SLinus Torvalds }; 241da177e4SLinus Torvalds 25019d80dbSAntonio Ospite #define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x)) 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds /* 291da177e4SLinus Torvalds * buffer types 301da177e4SLinus Torvalds */ 311da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_UNKNOWN 0 /* not defined */ 321da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_CONTINUOUS 1 /* continuous no-DMA memory */ 331da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_DEV 2 /* generic device continuous */ 3442e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC 5 /* continuous non-cahced */ 35cc6a8acdSTakashi Iwai #ifdef CONFIG_SND_DMA_SGBUF 361da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_DEV_SG 3 /* generic device SG-buffer */ 3742e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC_SG 6 /* SG non-cached */ 38cc6a8acdSTakashi Iwai #else 39cc6a8acdSTakashi Iwai #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */ 4042e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC_SG SNDRV_DMA_TYPE_DEV_UC 41cc6a8acdSTakashi Iwai #endif 42a5606f85STakashi Iwai #ifdef CONFIG_GENERIC_ALLOCATOR 4305503214SNicolin Chen #define SNDRV_DMA_TYPE_DEV_IRAM 4 /* generic device iram-buffer */ 44a5606f85STakashi Iwai #else 45a5606f85STakashi Iwai #define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV 46a5606f85STakashi Iwai #endif 471fe7f397STakashi Iwai #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */ 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* 501da177e4SLinus Torvalds * info for buffer allocation 511da177e4SLinus Torvalds */ 521da177e4SLinus Torvalds struct snd_dma_buffer { 531da177e4SLinus Torvalds struct snd_dma_device dev; /* device type */ 541da177e4SLinus Torvalds unsigned char *area; /* virtual pointer */ 551da177e4SLinus Torvalds dma_addr_t addr; /* physical address */ 561da177e4SLinus Torvalds size_t bytes; /* buffer size in bytes */ 571da177e4SLinus Torvalds void *private_data; /* private for allocator; don't touch */ 581da177e4SLinus Torvalds }; 591da177e4SLinus Torvalds 604cae99d9SPierre-Louis Bossart /* 614cae99d9SPierre-Louis Bossart * return the pages matching with the given byte size 624cae99d9SPierre-Louis Bossart */ 634cae99d9SPierre-Louis Bossart static inline unsigned int snd_sgbuf_aligned_pages(size_t size) 644cae99d9SPierre-Louis Bossart { 654cae99d9SPierre-Louis Bossart return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; 664cae99d9SPierre-Louis Bossart } 674cae99d9SPierre-Louis Bossart 681da177e4SLinus Torvalds /* allocate/release a buffer */ 691da177e4SLinus Torvalds int snd_dma_alloc_pages(int type, struct device *dev, size_t size, 701da177e4SLinus Torvalds struct snd_dma_buffer *dmab); 711da177e4SLinus Torvalds int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size, 721da177e4SLinus Torvalds struct snd_dma_buffer *dmab); 731da177e4SLinus Torvalds void snd_dma_free_pages(struct snd_dma_buffer *dmab); 74a202bd1aSTakashi Iwai int snd_dma_buffer_mmap(struct snd_dma_buffer *dmab, 75a202bd1aSTakashi Iwai struct vm_area_struct *area); 761da177e4SLinus Torvalds 7737af81c5STakashi Iwai dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, size_t offset); 7837af81c5STakashi Iwai struct page *snd_sgbuf_get_page(struct snd_dma_buffer *dmab, size_t offset); 7937af81c5STakashi Iwai unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab, 8037af81c5STakashi Iwai unsigned int ofs, unsigned int size); 8137af81c5STakashi Iwai 82*427ae268STakashi Iwai /* device-managed memory allocator */ 83*427ae268STakashi Iwai struct snd_dma_buffer *snd_devm_alloc_pages(struct device *dev, int type, 84*427ae268STakashi Iwai size_t size); 85*427ae268STakashi Iwai 861da177e4SLinus Torvalds #endif /* __SOUND_MEMALLOC_H */ 871da177e4SLinus Torvalds 88