/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* DMABUF Heaps Allocation Infrastructure
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*
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* Copyright (C) 2011 Google, Inc.
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* Copyright (C) 2019 Linaro Ltd.
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* Copyright (C) 2022 Rockchip Electronics Co. Ltd.
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* Author: Simon Xue <xxm@rock-chips.com>
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*/
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#ifndef _RK_DMA_HEAPS_H_
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#define _RK_DMA_HEAPS_H_
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#include <linux/dma-buf.h>
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struct rk_dma_heap;
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#if defined(CONFIG_DMABUF_HEAPS_ROCKCHIP)
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int rk_dma_heap_cma_setup(void);
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/**
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* rk_dma_heap_set_dev - set heap dev dma param
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* @heap: DMA-Heap to retrieve private data for
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*
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* Returns:
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* Zero on success, ERR_PTR(-errno) on error
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*/
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int rk_dma_heap_set_dev(struct device *heap_dev);
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/**
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* rk_dma_heap_find - Returns the registered dma_heap with the specified name
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* @name: Name of the heap to find
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*
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* NOTE: dma_heaps returned from this function MUST be released
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* using rk_dma_heap_put() when the user is done.
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*/
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struct rk_dma_heap *rk_dma_heap_find(const char *name);
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/** rk_dma_heap_buffer_free - Free dma_buf allocated by rk_dma_heap_buffer_alloc
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* @dma_buf: dma_buf to free
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*
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* This is really only a simple wrapper to dma_buf_put()
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*/
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void rk_dma_heap_buffer_free(struct dma_buf *dmabuf);
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/**
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* rk_dma_heap_buffer_alloc - Allocate dma-buf from a dma_heap
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* @heap: dma_heap to allocate from
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* @len: size to allocate
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* @fd_flags: flags to set on returned dma-buf fd
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* @heap_flags: flags to pass to the dma heap
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*
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* This is for internal dma-buf allocations only.
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*/
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struct dma_buf *rk_dma_heap_buffer_alloc(struct rk_dma_heap *heap, size_t len,
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unsigned int fd_flags,
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unsigned int heap_flags,
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const char *name);
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/**
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* rk_dma_heap_bufferfd_alloc - Allocate dma-buf fd from a dma_heap
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* @heap: dma_heap to allocate from
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* @len: size to allocate
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* @fd_flags: flags to set on returned dma-buf fd
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* @heap_flags: flags to pass to the dma heap
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*/
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int rk_dma_heap_bufferfd_alloc(struct rk_dma_heap *heap, size_t len,
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unsigned int fd_flags,
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unsigned int heap_flags,
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const char *name);
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/**
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* rk_dma_heap_alloc_contig_pages - Allocate contiguous pages from a dma_heap
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* @heap: dma_heap to allocate from
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* @len: size to allocate
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* @name: the name who allocate
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*/
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struct page *rk_dma_heap_alloc_contig_pages(struct rk_dma_heap *heap,
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size_t len, const char *name);
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/**
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* rk_dma_heap_free_contig_pages - Free contiguous pages to a dma_heap
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* @heap: dma_heap to free to
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* @pages: pages to free to
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* @len: size to free
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* @name: the name who allocate
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*/
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void rk_dma_heap_free_contig_pages(struct rk_dma_heap *heap, struct page *pages,
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size_t len, const char *name);
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#else
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static inline int rk_dma_heap_cma_setup(void)
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{
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return -ENODEV;
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}
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static inline int rk_dma_heap_set_dev(struct device *heap_dev)
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{
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return -ENODEV;
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}
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static inline struct rk_dma_heap *rk_dma_heap_find(const char *name)
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{
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return NULL;
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}
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static inline void rk_dma_heap_buffer_free(struct dma_buf *dmabuf)
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{
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}
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static inline struct dma_buf *rk_dma_heap_buffer_alloc(struct rk_dma_heap *heap, size_t len,
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unsigned int fd_flags,
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unsigned int heap_flags,
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const char *name)
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{
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return NULL;
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}
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static inline int rk_dma_heap_bufferfd_alloc(struct rk_dma_heap *heap, size_t len,
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unsigned int fd_flags,
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unsigned int heap_flags,
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const char *name)
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{
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return -ENODEV;
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}
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static inline struct page *rk_dma_heap_alloc_contig_pages(struct rk_dma_heap *heap,
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size_t len, const char *name)
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{
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return NULL;
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}
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static inline void rk_dma_heap_free_contig_pages(struct rk_dma_heap *heap, struct page *pages,
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size_t len, const char *name)
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{
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}
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#endif
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#endif /* _DMA_HEAPS_H */
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