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
42static int vmw_prime_map_attach(struct dma_buf *dma_buf,
43 struct dma_buf_attachment *attach)
44{
45 return -ENOSYS;
46}
47
48static void vmw_prime_map_detach(struct dma_buf *dma_buf,
49 struct dma_buf_attachment *attach)
50{
51}
52
53static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
54 enum dma_data_direction dir)
55{
56 return ERR_PTR(error: -ENOSYS);
57}
58
59static 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
65const 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
73int 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 int ret = ttm_prime_fd_to_handle(tfile, fd, handle);
79
80 if (ret)
81 ret = drm_gem_prime_fd_to_handle(dev, file_priv, prime_fd: fd, handle);
82
83 return ret;
84}
85
86int vmw_prime_handle_to_fd(struct drm_device *dev,
87 struct drm_file *file_priv,
88 uint32_t handle, uint32_t flags,
89 int *prime_fd)
90{
91 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
92 int ret;
93
94 if (handle > VMWGFX_NUM_MOB)
95 ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
96 else
97 ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle, flags, prime_fd);
98
99 return ret;
100}
101

source code of linux/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c