diff options
Diffstat (limited to 'include/linux/ion.h')
| -rw-r--r-- | include/linux/ion.h | 278 |
1 files changed, 4 insertions, 274 deletions
diff --git a/include/linux/ion.h b/include/linux/ion.h index 7c55c7d27a8..242fef6ba99 100644 --- a/include/linux/ion.h +++ b/include/linux/ion.h @@ -1,276 +1,6 @@ -/* - * include/linux/ion.h - * - * Copyright (C) 2011 Google, Inc. - * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ +#ifndef __LINUX_ION_H__ +#define __LINUX_ION_H__ -#ifndef _LINUX_ION_H -#define _LINUX_ION_H +#include "../../drivers/staging/android/ion/ion.h" -#include <linux/err.h> -#include <uapi/linux/ion.h> - -struct ion_device; -struct ion_heap; -struct ion_mapper; -struct ion_client; -struct ion_buffer; - -/* This should be removed some day when phys_addr_t's are fully - plumbed in the kernel, and all instances of ion_phys_addr_t should - be converted to phys_addr_t. For the time being many kernel interfaces - do not accept phys_addr_t's that would have to */ -#define ion_phys_addr_t dma_addr_t - -/** - * struct ion_platform_heap - defines a heap in the given platform - * @type: type of the heap from ion_heap_type enum - * @id: unique identifier for heap. When allocating higher numbers - * will be allocated from first. At allocation these are passed - * as a bit mask and therefore can not exceed ION_NUM_HEAP_IDS. - * @name: used for debug purposes - * @base: base address of heap in physical memory if applicable - * @size: size of the heap in bytes if applicable - * @has_outer_cache: set to 1 if outer cache is used, 0 otherwise. - * @extra_data: Extra data specific to each heap type - * @priv: heap private data - * @align: required alignment in physical memory if applicable - * @priv: private info passed from the board file - * - * Provided by the board file. - */ -struct ion_platform_heap { - enum ion_heap_type type; - unsigned int id; - const char *name; - ion_phys_addr_t base; - size_t size; - unsigned int has_outer_cache; - void *extra_data; - ion_phys_addr_t align; - void *priv; -}; - -/** - * struct ion_platform_data - array of platform heaps passed from board file - * @has_outer_cache: set to 1 if outer cache is used, 0 otherwise. - * @nr: number of structures in the array - * @heaps: array of platform_heap structions - * - * Provided by the board file in the form of platform data to a platform device. - */ -struct ion_platform_data { - unsigned int has_outer_cache; - int nr; - struct ion_platform_heap *heaps; -}; - -#ifdef CONFIG_ION - -/** - * ion_reserve() - reserve memory for ion heaps if applicable - * @data: platform data specifying starting physical address and - * size - * - * Calls memblock reserve to set aside memory for heaps that are - * located at specific memory addresses or of specfic sizes not - * managed by the kernel - */ -void ion_reserve(struct ion_platform_data *data); - -/** - * ion_client_create() - allocate a client and returns it - * @dev: the global ion device - * @heap_type_mask: mask of heaps this client can allocate from - * @name: used for debugging - */ -struct ion_client *ion_client_create(struct ion_device *dev, - const char *name); - -/** - * ion_client_destroy() - free's a client and all it's handles - * @client: the client - * - * Free the provided client and all it's resources including - * any handles it is holding. - */ -void ion_client_destroy(struct ion_client *client); - -/** - * ion_alloc - allocate ion memory - * @client: the client - * @len: size of the allocation - * @align: requested allocation alignment, lots of hardware blocks - * have alignment requirements of some kind - * @heap_id_mask: mask of heaps to allocate from, if multiple bits are set - * heaps will be tried in order from highest to lowest - * id - * @flags: heap flags, the low 16 bits are consumed by ion, the - * high 16 bits are passed on to the respective heap and - * can be heap custom - * - * Allocate memory in one of the heaps provided in heap mask and return - * an opaque handle to it. - */ -struct ion_handle *ion_alloc(struct ion_client *client, size_t len, - size_t align, unsigned int heap_id_mask, - unsigned int flags); - -/** - * ion_free - free a handle - * @client: the client - * @handle: the handle to free - * - * Free the provided handle. - */ -void ion_free(struct ion_client *client, struct ion_handle *handle); - -/** - * ion_phys - returns the physical address and len of a handle - * @client: the client - * @handle: the handle - * @addr: a pointer to put the address in - * @len: a pointer to put the length in - * - * This function queries the heap for a particular handle to get the - * handle's physical address. It't output is only correct if - * a heap returns physically contiguous memory -- in other cases - * this api should not be implemented -- ion_sg_table should be used - * instead. Returns -EINVAL if the handle is invalid. This has - * no implications on the reference counting of the handle -- - * the returned value may not be valid if the caller is not - * holding a reference. - */ -int ion_phys(struct ion_client *client, struct ion_handle *handle, - ion_phys_addr_t *addr, size_t *len); - -/** - * ion_map_dma - return an sg_table describing a handle - * @client: the client - * @handle: the handle - * - * This function returns the sg_table describing - * a particular ion handle. - */ -struct sg_table *ion_sg_table(struct ion_client *client, - struct ion_handle *handle); - -/** - * ion_map_kernel - create mapping for the given handle - * @client: the client - * @handle: handle to map - * - * Map the given handle into the kernel and return a kernel address that - * can be used to access this address. - */ -void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle); - -/** - * ion_unmap_kernel() - destroy a kernel mapping for a handle - * @client: the client - * @handle: handle to unmap - */ -void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle); - -/** - * ion_share_dma_buf() - share buffer as dma-buf - * @client: the client - * @handle: the handle - */ -struct dma_buf *ion_share_dma_buf(struct ion_client *client, - struct ion_handle *handle); - -/** - * ion_share_dma_buf_fd() - given an ion client, create a dma-buf fd - * @client: the client - * @handle: the handle - */ -int ion_share_dma_buf_fd(struct ion_client *client, struct ion_handle *handle); - -/** - * ion_import_dma_buf() - given an dma-buf fd from the ion exporter get handle - * @client: the client - * @fd: the dma-buf fd - * - * Given an dma-buf fd that was allocated through ion via ion_share_dma_buf, - * import that fd and return a handle representing it. If a dma-buf from - * another exporter is passed in this function will return ERR_PTR(-EINVAL) - */ -struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd); - -#else -static inline void ion_reserve(struct ion_platform_data *data) -{ - -} - -static inline struct ion_client *ion_client_create(struct ion_device *dev, - unsigned int heap_mask, const char *name) -{ - return ERR_PTR(-ENODEV); -} - -static inline void ion_client_destroy(struct ion_client *client) { } - -static inline struct ion_handle *ion_alloc(struct ion_client *client, - size_t len, size_t align, - unsigned int heap_mask, - unsigned int flags) -{ - return ERR_PTR(-ENODEV); -} - -static inline void ion_free(struct ion_client *client, - struct ion_handle *handle) { } - - -static inline int ion_phys(struct ion_client *client, - struct ion_handle *handle, ion_phys_addr_t *addr, size_t *len) -{ - return -ENODEV; -} - -static inline struct sg_table *ion_sg_table(struct ion_client *client, - struct ion_handle *handle) -{ - return ERR_PTR(-ENODEV); -} - -static inline void *ion_map_kernel(struct ion_client *client, - struct ion_handle *handle) -{ - return ERR_PTR(-ENODEV); -} - -static inline void ion_unmap_kernel(struct ion_client *client, - struct ion_handle *handle) { } - -static inline int ion_share_dma_buf(struct ion_client *client, struct ion_handle *handle) -{ - return -ENODEV; -} - -static inline struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd) -{ - return ERR_PTR(-ENODEV); -} - -static inline int ion_handle_get_flags(struct ion_client *client, - struct ion_handle *handle, unsigned long *flags) -{ - return -ENODEV; -} - -#endif /* CONFIG_ION */ -#endif /* _LINUX_ION_H */ +#endif /* __LINUX_ION_H__ */ |