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 mtx_unlock(&fd_screen_mutex);
59
60 if (destroy) {
61 pscreen->destroy = screen->winsys_priv;
62 pscreen->destroy(pscreen);
63 }
64 }
65
66 struct pipe_screen *
fd_drm_screen_create(int fd,struct renderonly * ro)67 fd_drm_screen_create(int fd, struct renderonly *ro)
68 {
69 struct pipe_screen *pscreen = NULL;
70
71 mtx_lock(&fd_screen_mutex);
72 if (!fd_tab) {
73 fd_tab = util_hash_table_create_fd_keys();
74 if (!fd_tab)
75 goto unlock;
76 }
77
78 pscreen = util_hash_table_get(fd_tab, intptr_to_pointer(fd));
79 if (pscreen) {
80 fd_screen(pscreen)->refcnt++;
81 } else {
82 struct fd_device *dev = fd_device_new_dup(fd);
83 if (!dev)
84 goto unlock;
85
86 pscreen = fd_screen_create(dev, ro);
87 if (pscreen) {
88 int fd = fd_device_fd(dev);
89
90 _mesa_hash_table_insert(fd_tab, intptr_to_pointer(fd), pscreen);
91
92 /* Bit of a hack, to avoid circular linkage dependency,
93 * ie. pipe driver having to call in to winsys, we
94 * override the pipe drivers screen->destroy():
95 */
96 fd_screen(pscreen)->winsys_priv = pscreen->destroy;
97 pscreen->destroy = fd_drm_screen_destroy;
98 }
99 }
100
101 unlock:
102 mtx_unlock(&fd_screen_mutex);
103 return pscreen;
104 }
105