cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drm_prime.h (4162B)

      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;
     57struct iosys_map;
     58
     59enum dma_data_direction;
     60
     61struct drm_device;
     62struct drm_gem_object;
     63struct drm_file;
     64
     65/* core prime functions */
     66struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
     67				      struct dma_buf_export_info *exp_info);
     68void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
     69
     70int drm_gem_prime_fd_to_handle(struct drm_device *dev,
     71			       struct drm_file *file_priv, int prime_fd, uint32_t *handle);
     72int drm_gem_prime_handle_to_fd(struct drm_device *dev,
     73			       struct drm_file *file_priv, uint32_t handle, uint32_t flags,
     74			       int *prime_fd);
     75
     76/* helper functions for exporting */
     77int drm_gem_map_attach(struct dma_buf *dma_buf,
     78		       struct dma_buf_attachment *attach);
     79void drm_gem_map_detach(struct dma_buf *dma_buf,
     80			struct dma_buf_attachment *attach);
     81struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
     82				     enum dma_data_direction dir);
     83void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
     84			   struct sg_table *sgt,
     85			   enum dma_data_direction dir);
     86int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct iosys_map *map);
     87void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct iosys_map *map);
     88
     89int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
     90int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
     91
     92struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev,
     93				       struct page **pages, unsigned int nr_pages);
     94struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj,
     95				     int flags);
     96
     97unsigned long drm_prime_get_contiguous_size(struct sg_table *sgt);
     98
     99/* helper functions for importing */
    100struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
    101						struct dma_buf *dma_buf,
    102						struct device *attach_dev);
    103struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
    104					    struct dma_buf *dma_buf);
    105
    106void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
    107
    108int drm_prime_sg_to_page_array(struct sg_table *sgt, struct page **pages,
    109			       int max_pages);
    110int drm_prime_sg_to_dma_addr_array(struct sg_table *sgt, dma_addr_t *addrs,
    111				   int max_pages);
    112
    113#endif /* __DRM_PRIME_H__ */