1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright (c) 2013-2024 Broadcom. All Rights Reserved. The term
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28/*
29 * Authors:
30 * Thomas Hellstrom <thellstrom@vmware.com>
31 *
32 */
33
34#include "vmwgfx_drv.h"
35#include "vmwgfx_bo.h"
36#include "ttm_object.h"
37#include <linux/dma-buf.h>
38
39/*
40 * DMA-BUF attach- and mapping methods. No need to implement
41 * these until we have other virtual devices use them.
42 */
43
44static int vmw_prime_map_attach(struct dma_buf *dma_buf,
45 struct dma_buf_attachment *attach)
46{
47 return -ENOSYS;
48}
49
50static void vmw_prime_map_detach(struct dma_buf *dma_buf,
51 struct dma_buf_attachment *attach)
52{
53}
54
55static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
56 enum dma_data_direction dir)
57{
58 return ERR_PTR(error: -ENOSYS);
59}
60
61static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
62 struct sg_table *sgb,
63 enum dma_data_direction dir)
64{
65}
66
67const struct dma_buf_ops vmw_prime_dmabuf_ops = {
68 .attach = vmw_prime_map_attach,
69 .detach = vmw_prime_map_detach,
70 .map_dma_buf = vmw_prime_map_dma_buf,
71 .unmap_dma_buf = vmw_prime_unmap_dma_buf,
72 .release = NULL,
73};
74
75int vmw_prime_fd_to_handle(struct drm_device *dev,
76 struct drm_file *file_priv,
77 int fd, u32 *handle)
78{
79 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
80 int ret = ttm_prime_fd_to_handle(tfile, fd, handle);
81
82 if (ret)
83 ret = drm_gem_prime_fd_to_handle(dev, file_priv, prime_fd: fd, handle);
84
85 return ret;
86}
87
88int vmw_prime_handle_to_fd(struct drm_device *dev,
89 struct drm_file *file_priv,
90 uint32_t handle, uint32_t flags,
91 int *prime_fd)
92{
93 struct vmw_private *vmw = vmw_priv(dev);
94 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
95 struct vmw_bo *vbo;
96 int ret;
97 int surf_handle;
98
99 if (handle > VMWGFX_NUM_MOB) {
100 ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
101 } else {
102 ret = vmw_user_bo_lookup(filp: file_priv, handle, out: &vbo);
103 if (ret)
104 return ret;
105 if (vbo && vbo->is_dumb) {
106 ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle,
107 flags, prime_fd);
108 } else {
109 surf_handle = vmw_lookup_surface_handle_for_buffer(vmw,
110 bo: vbo,
111 handle);
112 if (surf_handle > 0)
113 ret = ttm_prime_handle_to_fd(tfile, handle: surf_handle,
114 flags, prime_fd);
115 else
116 ret = drm_gem_prime_handle_to_fd(dev, file_priv,
117 handle, flags,
118 prime_fd);
119 }
120 vmw_user_bo_unref(buf: &vbo);
121 }
122
123 return ret;
124}
125

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