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
vmw_prime_map_attach(struct dma_buf * dma_buf,struct dma_buf_attachment * attach)42 static int vmw_prime_map_attach(struct dma_buf *dma_buf,
43 struct dma_buf_attachment *attach)
44 {
45 return -ENOSYS;
46 }
47
vmw_prime_map_detach(struct dma_buf * dma_buf,struct dma_buf_attachment * attach)48 static void vmw_prime_map_detach(struct dma_buf *dma_buf,
49 struct dma_buf_attachment *attach)
50 {
51 }
52
vmw_prime_map_dma_buf(struct dma_buf_attachment * attach,enum dma_data_direction dir)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
vmw_prime_unmap_dma_buf(struct dma_buf_attachment * attach,struct sg_table * sgb,enum dma_data_direction dir)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
vmw_prime_fd_to_handle(struct drm_device * dev,struct drm_file * file_priv,int fd,u32 * handle)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
vmw_prime_handle_to_fd(struct drm_device * dev,struct drm_file * file_priv,uint32_t handle,uint32_t flags,int * prime_fd)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 }
91