linux/include/drm/drm_prime.h
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   1/*
   2 * Copyright © 2012 Red Hat
   3 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   4 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   5 * Copyright (c) 2009-2010, Code Aurora Forum.
   6 *
   7 * Permission is hereby granted, free of charge, to any person obtaining a
   8 * copy of this software and associated documentation files (the "Software"),
   9 * to deal in the Software without restriction, including without limitation
  10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11 * and/or sell copies of the Software, and to permit persons to whom the
  12 * Software is furnished to do so, subject to the following conditions:
  13 *
  14 * The above copyright notice and this permission notice (including the next
  15 * paragraph) shall be included in all copies or substantial portions of the
  16 * Software.
  17 *
  18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  24 * IN THE SOFTWARE.
  25 *
  26 * Authors:
  27 *      Dave Airlie <airlied@redhat.com>
  28 *      Rob Clark <rob.clark@linaro.org>
  29 *
  30 */
  31
  32#ifndef __DRM_PRIME_H__
  33#define __DRM_PRIME_H__
  34
  35#include <linux/mutex.h>
  36#include <linux/rbtree.h>
  37#include <linux/scatterlist.h>
  38
  39/**
  40 * struct drm_prime_file_private - per-file tracking for PRIME
  41 *
  42 * This just contains the internal &struct dma_buf and handle caches for each
  43 * &struct drm_file used by the PRIME core code.
  44 */
  45struct drm_prime_file_private {
  46/* private: */
  47        struct mutex lock;
  48        struct rb_root dmabufs;
  49        struct rb_root handles;
  50};
  51
  52struct device;
  53
  54struct dma_buf_export_info;
  55struct dma_buf;
  56struct dma_buf_attachment;
  57
  58enum dma_data_direction;
  59
  60struct drm_device;
  61struct drm_gem_object;
  62struct drm_file;
  63
  64struct device;
  65
  66/* core prime functions */
  67struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
  68                                      struct dma_buf_export_info *exp_info);
  69void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
  70
  71int drm_gem_prime_fd_to_handle(struct drm_device *dev,
  72                               struct drm_file *file_priv, int prime_fd, uint32_t *handle);
  73int drm_gem_prime_handle_to_fd(struct drm_device *dev,
  74                               struct drm_file *file_priv, uint32_t handle, uint32_t flags,
  75                               int *prime_fd);
  76
  77/* helper functions for exporting */
  78int drm_gem_map_attach(struct dma_buf *dma_buf,
  79                       struct dma_buf_attachment *attach);
  80void drm_gem_map_detach(struct dma_buf *dma_buf,
  81                        struct dma_buf_attachment *attach);
  82struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
  83                                     enum dma_data_direction dir);
  84void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
  85                           struct sg_table *sgt,
  86                           enum dma_data_direction dir);
  87void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
  88void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
  89
  90int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
  91int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
  92
  93struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
  94struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj,
  95                                     int flags);
  96
  97/* helper functions for importing */
  98struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
  99                                                struct dma_buf *dma_buf,
 100                                                struct device *attach_dev);
 101struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
 102                                            struct dma_buf *dma_buf);
 103
 104void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
 105
 106int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
 107                                     dma_addr_t *addrs, int max_pages);
 108
 109
 110#endif /* __DRM_PRIME_H__ */
 111