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
44static struct util_hash_table *dev_hash = NULL;
45
46static 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
52static 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
65struct vmw_winsys_screen *
66vmw_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   return vws;
113out_no_hash_insert:
114out_no_svga:
115   vmw_pools_cleanup(vws);
116out_no_pools:
117   vws->fence_ops->destroy(vws->fence_ops);
118out_no_fence_ops:
119   vmw_ioctl_cleanup(vws);
120out_no_ioctl:
121   close(vws->ioctl.drm_fd);
122   FREE(vws);
123out_no_vws:
124   return NULL;
125}
126
127void
128vmw_winsys_destroy(struct vmw_winsys_screen *vws)
129{
130   if (--vws->open_count == 0) {
131      util_hash_table_remove(dev_hash, &vws->device);
132      vmw_pools_cleanup(vws);
133      vws->fence_ops->destroy(vws->fence_ops);
134      vmw_ioctl_cleanup(vws);
135      close(vws->ioctl.drm_fd);
136      FREE(vws);
137   }
138}
139