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 121da177e4SLinus Torvalds struct device; 13*37af81c5STakashi Iwai struct page; 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds /* 161da177e4SLinus Torvalds * buffer device info 171da177e4SLinus Torvalds */ 181da177e4SLinus Torvalds struct snd_dma_device { 191da177e4SLinus Torvalds int type; /* SNDRV_DMA_TYPE_XXX */ 201da177e4SLinus Torvalds struct device *dev; /* generic device */ 211da177e4SLinus Torvalds }; 221da177e4SLinus Torvalds 23019d80dbSAntonio Ospite #define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x)) 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds /* 271da177e4SLinus Torvalds * buffer types 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_UNKNOWN 0 /* not defined */ 301da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_CONTINUOUS 1 /* continuous no-DMA memory */ 311da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_DEV 2 /* generic device continuous */ 3242e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC 5 /* continuous non-cahced */ 33cc6a8acdSTakashi Iwai #ifdef CONFIG_SND_DMA_SGBUF 341da177e4SLinus Torvalds #define SNDRV_DMA_TYPE_DEV_SG 3 /* generic device SG-buffer */ 3542e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC_SG 6 /* SG non-cached */ 36cc6a8acdSTakashi Iwai #else 37cc6a8acdSTakashi Iwai #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */ 3842e748a0STakashi Iwai #define SNDRV_DMA_TYPE_DEV_UC_SG SNDRV_DMA_TYPE_DEV_UC 39cc6a8acdSTakashi Iwai #endif 40a5606f85STakashi Iwai #ifdef CONFIG_GENERIC_ALLOCATOR 4105503214SNicolin Chen #define SNDRV_DMA_TYPE_DEV_IRAM 4 /* generic device iram-buffer */ 42a5606f85STakashi Iwai #else 43a5606f85STakashi Iwai #define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV 44a5606f85STakashi Iwai #endif 451fe7f397STakashi Iwai #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */ 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds /* 481da177e4SLinus Torvalds * info for buffer allocation 491da177e4SLinus Torvalds */ 501da177e4SLinus Torvalds struct snd_dma_buffer { 511da177e4SLinus Torvalds struct snd_dma_device dev; /* device type */ 521da177e4SLinus Torvalds unsigned char *area; /* virtual pointer */ 531da177e4SLinus Torvalds dma_addr_t addr; /* physical address */ 541da177e4SLinus Torvalds size_t bytes; /* buffer size in bytes */ 551da177e4SLinus Torvalds void *private_data; /* private for allocator; don't touch */ 561da177e4SLinus Torvalds }; 571da177e4SLinus Torvalds 584cae99d9SPierre-Louis Bossart /* 594cae99d9SPierre-Louis Bossart * return the pages matching with the given byte size 604cae99d9SPierre-Louis Bossart */ 614cae99d9SPierre-Louis Bossart static inline unsigned int snd_sgbuf_aligned_pages(size_t size) 624cae99d9SPierre-Louis Bossart { 634cae99d9SPierre-Louis Bossart return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; 644cae99d9SPierre-Louis Bossart } 654cae99d9SPierre-Louis Bossart 661da177e4SLinus Torvalds /* allocate/release a buffer */ 671da177e4SLinus Torvalds int snd_dma_alloc_pages(int type, struct device *dev, size_t size, 681da177e4SLinus Torvalds struct snd_dma_buffer *dmab); 691da177e4SLinus Torvalds int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size, 701da177e4SLinus Torvalds struct snd_dma_buffer *dmab); 711da177e4SLinus Torvalds void snd_dma_free_pages(struct snd_dma_buffer *dmab); 721da177e4SLinus Torvalds 73*37af81c5STakashi Iwai dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, size_t offset); 74*37af81c5STakashi Iwai struct page *snd_sgbuf_get_page(struct snd_dma_buffer *dmab, size_t offset); 75*37af81c5STakashi Iwai unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab, 76*37af81c5STakashi Iwai unsigned int ofs, unsigned int size); 77*37af81c5STakashi Iwai 781da177e4SLinus Torvalds #endif /* __SOUND_MEMALLOC_H */ 791da177e4SLinus Torvalds 80