LXR linux/drivers/gpu/drm/vmwgfx/vmwgfx

   1/**************************************************************************
   2 *
   3 * Copyright © 2013 VMware, Inc., Palo Alto, CA., USA
   4 * All Rights Reserved.
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a
   7 * copy of this software and associated documentation files (the
   8 * "Software"), to deal in the Software without restriction, including
   9 * without limitation the rights to use, copy, modify, merge, publish,
  10 * distribute, sub license, and/or sell copies of the Software, and to
  11 * permit persons to whom the Software is furnished to do so, subject to
  12 * the following conditions:
  13 *
  14 * The above copyright notice and this permission notice (including the
  15 * next paragraph) shall be included in all copies or substantial portions
  16 * of the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 *
  26 **************************************************************************/
  27/*
  28 * Authors:
  29 *     Thomas Hellstrom <thellstrom@vmware.com>
  30 *
  31 */
  32
  33#include "vmwgfx_drv.h"
  34#include <linux/dma-buf.h>
  35#include <drm/ttm/ttm_object.h>
  36
  37/*
  38 * DMA-BUF attach- and mapping methods. No need to implement
  39 * these until we have other virtual devices use them.
  40 */
  41
  42static int vmw_prime_map_attach(struct dma_buf *dma_buf,
  43                                struct device *target_dev,
  44                                struct dma_buf_attachment *attach)
  45{
  46        return -ENOSYS;
  47}
  48
  49static void vmw_prime_map_detach(struct dma_buf *dma_buf,
  50                                 struct dma_buf_attachment *attach)
  51{
  52}
  53
  54static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
  55                                              enum dma_data_direction dir)
  56{
  57        return ERR_PTR(-ENOSYS);
  58}
  59
  60static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
  61                                    struct sg_table *sgb,
  62                                    enum dma_data_direction dir)
  63{
  64}
  65
  66static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
  67{
  68        return NULL;
  69}
  70
  71static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
  72{
  73}
  74
  75static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
  76                unsigned long page_num)
  77{
  78        return NULL;
  79}
  80
  81static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
  82                unsigned long page_num, void *addr)
  83{
  84
  85}
  86static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
  87                unsigned long page_num)
  88{
  89        return NULL;
  90}
  91
  92static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
  93                unsigned long page_num, void *addr)
  94{
  95
  96}
  97
  98static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf,
  99                                 struct vm_area_struct *vma)
 100{
 101        WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n");
 102        return -ENOSYS;
 103}
 104
 105const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
 106        .attach = vmw_prime_map_attach,
 107        .detach = vmw_prime_map_detach,
 108        .map_dma_buf = vmw_prime_map_dma_buf,
 109        .unmap_dma_buf = vmw_prime_unmap_dma_buf,
 110        .release = NULL,
 111        .kmap = vmw_prime_dmabuf_kmap,
 112        .kmap_atomic = vmw_prime_dmabuf_kmap_atomic,
 113        .kunmap = vmw_prime_dmabuf_kunmap,
 114        .kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic,
 115        .mmap = vmw_prime_dmabuf_mmap,
 116        .vmap = vmw_prime_dmabuf_vmap,
 117        .vunmap = vmw_prime_dmabuf_vunmap,
 118};
 119
 120int vmw_prime_fd_to_handle(struct drm_device *dev,
 121                           struct drm_file *file_priv,
 122                           int fd, u32 *handle)
 123{
 124        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 125
 126        return ttm_prime_fd_to_handle(tfile, fd, handle);
 127}
 128
 129int vmw_prime_handle_to_fd(struct drm_device *dev,
 130                           struct drm_file *file_priv,
 131                           uint32_t handle, uint32_t flags,
 132                           int *prime_fd)
 133{
 134        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 135
 136        return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
 137}
 138