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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