1 /*
2 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robclark@freedesktop.org>
25 */
26
27 #include <sys/stat.h>
28
29 #include "pipe/p_context.h"
30 #include "pipe/p_state.h"
31 #include "util/format/u_format.h"
32 #include "util/u_memory.h"
33 #include "util/u_inlines.h"
34 #include "util/u_hash_table.h"
35 #include "util/u_pointer.h"
36 #include "os/os_thread.h"
37
38 #include "freedreno_drm_public.h"
39
40 #include "freedreno/freedreno_screen.h"
41
42 static struct hash_table *fd_tab = NULL;
43
44 static mtx_t fd_screen_mutex = _MTX_INITIALIZER_NP;
45
46 static void
fd_drm_screen_destroy(struct pipe_screen * pscreen)47 fd_drm_screen_destroy(struct pipe_screen *pscreen)
48 {
49 struct fd_screen *screen = fd_screen(pscreen);
50 boolean destroy;
51
52 mtx_lock(&fd_screen_mutex);
53 destroy = --screen->refcnt == 0;
54 if (destroy) {
55 int fd = fd_device_fd(screen->dev);
56 _mesa_hash_table_remove_key(fd_tab, intptr_to_pointer(fd));
57
58 if (!fd_tab->entries) {
59 _mesa_hash_table_destroy(fd_tab, NULL);
60 fd_tab = NULL;
61 }
62 }
63 mtx_unlock(&fd_screen_mutex);
64
65 if (destroy) {
66 pscreen->destroy = screen->winsys_priv;
67 pscreen->destroy(pscreen);
68 }
69 }
70
71 struct pipe_screen *
fd_drm_screen_create(int fd,struct renderonly * ro,const struct pipe_screen_config * config)72 fd_drm_screen_create(int fd, struct renderonly *ro,
73 const struct pipe_screen_config *config)
74 {
75 struct pipe_screen *pscreen = NULL;
76
77 mtx_lock(&fd_screen_mutex);
78 if (!fd_tab) {
79 fd_tab = util_hash_table_create_fd_keys();
80 if (!fd_tab)
81 goto unlock;
82 }
83
84 pscreen = util_hash_table_get(fd_tab, intptr_to_pointer(fd));
85 if (pscreen) {
86 fd_screen(pscreen)->refcnt++;
87 } else {
88 struct fd_device *dev = fd_device_new_dup(fd);
89 if (!dev)
90 goto unlock;
91
92 pscreen = fd_screen_create(dev, ro, config);
93 if (pscreen) {
94 int fd = fd_device_fd(dev);
95
96 _mesa_hash_table_insert(fd_tab, intptr_to_pointer(fd), pscreen);
97
98 /* Bit of a hack, to avoid circular linkage dependency,
99 * ie. pipe driver having to call in to winsys, we
100 * override the pipe drivers screen->destroy():
101 */
102 fd_screen(pscreen)->winsys_priv = pscreen->destroy;
103 pscreen->destroy = fd_drm_screen_destroy;
104 }
105 }
106
107 unlock:
108 mtx_unlock(&fd_screen_mutex);
109 return pscreen;
110 }
111