include/drm/drm_prime.h

   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  */
  45 struct drm_prime_file_private {
  46 /* private: */
  47         struct mutex lock;
  48         struct rb_root dmabufs;
  49         struct rb_root handles;
  50 };
  51
  52 struct device;
  53
  54 struct dma_buf_export_info;
  55 struct dma_buf;
  56 struct dma_buf_attachment;
  57
  58 enum dma_data_direction;
  59
  60 struct drm_device;
  61 struct drm_gem_object;
  62 struct drm_file;
  63
  64 /* core prime functions */
  65 struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
  66                                       struct dma_buf_export_info *exp_info);
  67 void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
  68
  69 int drm_gem_prime_fd_to_handle(struct drm_device *dev,
  70                                struct drm_file *file_priv, int prime_fd, uint32_t *handle);
  71 int drm_gem_prime_handle_to_fd(struct drm_device *dev,
  72                                struct drm_file *file_priv, uint32_t handle, uint32_t flags,
  73                                int *prime_fd);
  74
  75 /* helper functions for exporting */
  76 int drm_gem_map_attach(struct dma_buf *dma_buf,
  77                        struct dma_buf_attachment *attach);
  78 void drm_gem_map_detach(struct dma_buf *dma_buf,
  79                         struct dma_buf_attachment *attach);
  80 struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
  81                                      enum dma_data_direction dir);
  82 void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
  83                            struct sg_table *sgt,
  84                            enum dma_data_direction dir);
  85 void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
  86 void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
  87
  88 int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
  89 int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
  90
  91 struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
  92 struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj,
  93                                      int flags);
  94
  95 /* helper functions for importing */
  96 struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
  97                                                 struct dma_buf *dma_buf,
  98                                                 struct device *attach_dev);
  99 struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
 100                                             struct dma_buf *dma_buf);
 101
 102 void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
 103
 104 int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
 105                                      dma_addr_t *addrs, int max_pages);
 106
 107
 108 #endif /* __DRM_PRIME_H__ */