![John Stultz](/assets/img/avatar_default.png)
Just some simple cleanups to address whitespace issues and other issues found w/ checkpatch. Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
205 lines
6.3 KiB
C
205 lines
6.3 KiB
C
/*
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* drivers/staging/android/ion/ion.h
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*
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* Copyright (C) 2011 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _LINUX_ION_H
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#define _LINUX_ION_H
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#include <linux/types.h>
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#include "../uapi/ion.h"
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struct ion_handle;
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struct ion_device;
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struct ion_heap;
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struct ion_mapper;
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struct ion_client;
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struct ion_buffer;
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/* This should be removed some day when phys_addr_t's are fully
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plumbed in the kernel, and all instances of ion_phys_addr_t should
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be converted to phys_addr_t. For the time being many kernel interfaces
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do not accept phys_addr_t's that would have to */
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#define ion_phys_addr_t unsigned long
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/**
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* struct ion_platform_heap - defines a heap in the given platform
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* @type: type of the heap from ion_heap_type enum
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* @id: unique identifier for heap. When allocating higher numbers
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* will be allocated from first. At allocation these are passed
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* as a bit mask and therefore can not exceed ION_NUM_HEAP_IDS.
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* @name: used for debug purposes
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* @base: base address of heap in physical memory if applicable
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* @size: size of the heap in bytes if applicable
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* @align: required alignment in physical memory if applicable
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* @priv: private info passed from the board file
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*
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* Provided by the board file.
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*/
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struct ion_platform_heap {
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enum ion_heap_type type;
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unsigned int id;
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const char *name;
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ion_phys_addr_t base;
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size_t size;
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ion_phys_addr_t align;
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void *priv;
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};
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/**
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* struct ion_platform_data - array of platform heaps passed from board file
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* @nr: number of structures in the array
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* @heaps: array of platform_heap structions
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*
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* Provided by the board file in the form of platform data to a platform device.
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*/
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struct ion_platform_data {
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int nr;
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struct ion_platform_heap *heaps;
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};
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/**
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* ion_reserve() - reserve memory for ion heaps if applicable
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* @data: platform data specifying starting physical address and
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* size
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*
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* Calls memblock reserve to set aside memory for heaps that are
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* located at specific memory addresses or of specfic sizes not
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* managed by the kernel
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*/
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void ion_reserve(struct ion_platform_data *data);
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/**
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* ion_client_create() - allocate a client and returns it
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* @dev: the global ion device
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* @heap_type_mask: mask of heaps this client can allocate from
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* @name: used for debugging
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*/
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struct ion_client *ion_client_create(struct ion_device *dev,
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const char *name);
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/**
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* ion_client_destroy() - free's a client and all it's handles
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* @client: the client
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*
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* Free the provided client and all it's resources including
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* any handles it is holding.
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*/
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void ion_client_destroy(struct ion_client *client);
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/**
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* ion_alloc - allocate ion memory
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* @client: the client
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* @len: size of the allocation
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* @align: requested allocation alignment, lots of hardware blocks
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* have alignment requirements of some kind
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* @heap_id_mask: mask of heaps to allocate from, if multiple bits are set
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* heaps will be tried in order from highest to lowest
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* id
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* @flags: heap flags, the low 16 bits are consumed by ion, the
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* high 16 bits are passed on to the respective heap and
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* can be heap custom
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*
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* Allocate memory in one of the heaps provided in heap mask and return
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* an opaque handle to it.
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*/
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struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
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size_t align, unsigned int heap_id_mask,
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unsigned int flags);
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/**
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* ion_free - free a handle
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* @client: the client
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* @handle: the handle to free
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*
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* Free the provided handle.
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*/
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void ion_free(struct ion_client *client, struct ion_handle *handle);
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/**
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* ion_phys - returns the physical address and len of a handle
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* @client: the client
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* @handle: the handle
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* @addr: a pointer to put the address in
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* @len: a pointer to put the length in
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*
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* This function queries the heap for a particular handle to get the
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* handle's physical address. It't output is only correct if
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* a heap returns physically contiguous memory -- in other cases
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* this api should not be implemented -- ion_sg_table should be used
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* instead. Returns -EINVAL if the handle is invalid. This has
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* no implications on the reference counting of the handle --
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* the returned value may not be valid if the caller is not
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* holding a reference.
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*/
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int ion_phys(struct ion_client *client, struct ion_handle *handle,
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ion_phys_addr_t *addr, size_t *len);
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/**
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* ion_map_dma - return an sg_table describing a handle
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* @client: the client
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* @handle: the handle
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*
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* This function returns the sg_table describing
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* a particular ion handle.
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*/
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struct sg_table *ion_sg_table(struct ion_client *client,
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struct ion_handle *handle);
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/**
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* ion_map_kernel - create mapping for the given handle
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* @client: the client
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* @handle: handle to map
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*
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* Map the given handle into the kernel and return a kernel address that
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* can be used to access this address.
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*/
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void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle);
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/**
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* ion_unmap_kernel() - destroy a kernel mapping for a handle
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* @client: the client
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* @handle: handle to unmap
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*/
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void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle);
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/**
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* ion_share_dma_buf() - share buffer as dma-buf
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* @client: the client
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* @handle: the handle
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*/
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struct dma_buf *ion_share_dma_buf(struct ion_client *client,
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struct ion_handle *handle);
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/**
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* ion_share_dma_buf_fd() - given an ion client, create a dma-buf fd
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* @client: the client
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* @handle: the handle
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*/
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int ion_share_dma_buf_fd(struct ion_client *client, struct ion_handle *handle);
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/**
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* ion_import_dma_buf() - given an dma-buf fd from the ion exporter get handle
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* @client: the client
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* @fd: the dma-buf fd
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*
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* Given an dma-buf fd that was allocated through ion via ion_share_dma_buf,
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* import that fd and return a handle representing it. If a dma-buf from
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* another exporter is passed in this function will return ERR_PTR(-EINVAL)
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*/
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struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd);
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#endif /* _LINUX_ION_H */
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