1 /**********************************************************
2 * Copyright 2009-2015 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26
27 #include "vmw_screen.h"
28 #include "vmw_fence.h"
29 #include "vmw_context.h"
30
31 #include "util/u_memory.h"
32 #include "pipe/p_compiler.h"
33 #include "util/u_hash_table.h"
34 #ifdef MAJOR_IN_MKDEV
35 #include <sys/mkdev.h>
36 #endif
37 #ifdef MAJOR_IN_SYSMACROS
38 #include <sys/sysmacros.h>
39 #endif
40 #include <sys/stat.h>
41 #include <unistd.h>
42 #include <fcntl.h>
43
44 static struct util_hash_table *dev_hash = NULL;
45
vmw_dev_compare(void * key1,void * key2)46 static int vmw_dev_compare(void *key1, void *key2)
47 {
48 return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
49 minor(*(dev_t *)key1) == minor(*(dev_t *)key2)) ? 0 : 1;
50 }
51
vmw_dev_hash(void * key)52 static unsigned vmw_dev_hash(void *key)
53 {
54 return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
55 }
56
57 /* Called from vmw_drm_create_screen(), creates and initializes the
58 * vmw_winsys_screen structure, which is the main entity in this
59 * module.
60 * First, check whether a vmw_winsys_screen object already exists for
61 * this device, and in that case return that one, making sure that we
62 * have our own file descriptor open to DRM.
63 */
64
65 struct vmw_winsys_screen *
vmw_winsys_create(int fd)66 vmw_winsys_create( int fd )
67 {
68 struct vmw_winsys_screen *vws;
69 struct stat stat_buf;
70
71 if (dev_hash == NULL) {
72 dev_hash = util_hash_table_create(vmw_dev_hash, vmw_dev_compare);
73 if (dev_hash == NULL)
74 return NULL;
75 }
76
77 if (fstat(fd, &stat_buf))
78 return NULL;
79
80 vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
81 if (vws) {
82 vws->open_count++;
83 return vws;
84 }
85
86 vws = CALLOC_STRUCT(vmw_winsys_screen);
87 if (!vws)
88 goto out_no_vws;
89
90 vws->device = stat_buf.st_rdev;
91 vws->open_count = 1;
92 vws->ioctl.drm_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
93 vws->base.have_gb_dma = TRUE;
94 vws->base.need_to_rebind_resources = FALSE;
95
96 if (!vmw_ioctl_init(vws))
97 goto out_no_ioctl;
98
99 vws->fence_ops = vmw_fence_ops_create(vws);
100 if (!vws->fence_ops)
101 goto out_no_fence_ops;
102
103 if(!vmw_pools_init(vws))
104 goto out_no_pools;
105
106 if (!vmw_winsys_screen_init_svga(vws))
107 goto out_no_svga;
108
109 if (util_hash_table_set(dev_hash, &vws->device, vws) != PIPE_OK)
110 goto out_no_hash_insert;
111
112 cnd_init(&vws->cs_cond);
113 mtx_init(&vws->cs_mutex, mtx_plain);
114
115 return vws;
116 out_no_hash_insert:
117 out_no_svga:
118 vmw_pools_cleanup(vws);
119 out_no_pools:
120 vws->fence_ops->destroy(vws->fence_ops);
121 out_no_fence_ops:
122 vmw_ioctl_cleanup(vws);
123 out_no_ioctl:
124 close(vws->ioctl.drm_fd);
125 FREE(vws);
126 out_no_vws:
127 return NULL;
128 }
129
130 void
vmw_winsys_destroy(struct vmw_winsys_screen * vws)131 vmw_winsys_destroy(struct vmw_winsys_screen *vws)
132 {
133 if (--vws->open_count == 0) {
134 util_hash_table_remove(dev_hash, &vws->device);
135 vmw_pools_cleanup(vws);
136 vws->fence_ops->destroy(vws->fence_ops);
137 vmw_ioctl_cleanup(vws);
138 close(vws->ioctl.drm_fd);
139 mtx_destroy(&vws->cs_mutex);
140 cnd_destroy(&vws->cs_cond);
141 FREE(vws);
142 }
143 }
144