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__ */ 109