drivers/gpu/drm/vmwgfx/vmwgfx_prime.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2013 VMware, Inc., Palo Alto, CA., USA
   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 "ttm_object.h"
  35 #include <linux/dma-buf.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 dma_buf_attachment *attach)
  44 {
  45         return -ENOSYS;
  46 }
  47
  48 static void vmw_prime_map_detach(struct dma_buf *dma_buf,
  49                                  struct dma_buf_attachment *attach)
  50 {
  51 }
  52
  53 static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
  54                                               enum dma_data_direction dir)
  55 {
  56         return ERR_PTR(-ENOSYS);
  57 }
  58
  59 static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
  60                                     struct sg_table *sgb,
  61                                     enum dma_data_direction dir)
  62 {
  63 }
  64
  65 const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
  66         .attach = vmw_prime_map_attach,
  67         .detach = vmw_prime_map_detach,
  68         .map_dma_buf = vmw_prime_map_dma_buf,
  69         .unmap_dma_buf = vmw_prime_unmap_dma_buf,
  70         .release = NULL,
  71 };
  72
  73 int vmw_prime_fd_to_handle(struct drm_device *dev,
  74                            struct drm_file *file_priv,
  75                            int fd, u32 *handle)
  76 {
  77         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
  78
  79         return ttm_prime_fd_to_handle(tfile, fd, handle);
  80 }
  81
  82 int vmw_prime_handle_to_fd(struct drm_device *dev,
  83                            struct drm_file *file_priv,
  84                            uint32_t handle, uint32_t flags,
  85                            int *prime_fd)
  86 {
  87         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
  88
  89         return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
  90 }