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  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.  
  42. static 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.  
  49. static void vmw_prime_map_detach(struct dma_buf *dma_buf,
  50.                                  struct dma_buf_attachment *attach)
  51. {
  52. }
  53.  
  54. static 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.  
  60. static 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.  
  66. static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
  67. {
  68.         return NULL;
  69. }
  70.  
  71. static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
  72. {
  73. }
  74.  
  75. static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
  76.                 unsigned long page_num)
  77. {
  78.         return NULL;
  79. }
  80.  
  81. static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
  82.                 unsigned long page_num, void *addr)
  83. {
  84.  
  85. }
  86. static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
  87.                 unsigned long page_num)
  88. {
  89.         return NULL;
  90. }
  91.  
  92. static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
  93.                 unsigned long page_num, void *addr)
  94. {
  95.  
  96. }
  97.  
  98. static 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.  
  105. const 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.  
  120. int 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.  
  129. int 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.