1 /*
2 * Copyright (c) 2015 Etnaviv Project
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, sub license,
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
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the 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 NON-INFRINGEMENT. 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
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Christian Gmeiner <christian.gmeiner@gmail.com>
25 */
26
27 #include <sys/stat.h>
28
29 #include "util/u_hash_table.h"
30 #include "util/u_memory.h"
31
32 #include "etnaviv/etnaviv_screen.h"
33 #include "etnaviv/hw/common.xml.h"
34 #include "etnaviv_drm_public.h"
35
36 #include <stdio.h>
37
38 static struct pipe_screen *
screen_create(struct renderonly * ro)39 screen_create(struct renderonly *ro)
40 {
41 struct etna_device *dev;
42 struct etna_gpu *gpu;
43 uint64_t val;
44 int i;
45
46 dev = etna_device_new_dup(ro->gpu_fd);
47 if (!dev) {
48 fprintf(stderr, "Error creating device\n");
49 return NULL;
50 }
51
52 for (i = 0;; i++) {
53 gpu = etna_gpu_new(dev, i);
54 if (!gpu) {
55 fprintf(stderr, "Error creating gpu\n");
56 return NULL;
57 }
58
59 /* Look for a 3D capable GPU */
60 int ret = etna_gpu_get_param(gpu, ETNA_GPU_FEATURES_0, &val);
61 if (ret == 0 && (val & chipFeatures_PIPE_3D))
62 break;
63
64 etna_gpu_del(gpu);
65 }
66
67 return etna_screen_create(dev, gpu, ro);
68 }
69
70 static struct util_hash_table *etna_tab = NULL;
71
72 pipe_static_mutex(etna_screen_mutex);
73
74 static void
etna_drm_screen_destroy(struct pipe_screen * pscreen)75 etna_drm_screen_destroy(struct pipe_screen *pscreen)
76 {
77 struct etna_screen *screen = etna_screen(pscreen);
78 boolean destroy;
79
80 pipe_mutex_lock(etna_screen_mutex);
81 destroy = --screen->refcnt == 0;
82 if (destroy) {
83 int fd = etna_device_fd(screen->dev);
84 util_hash_table_remove(etna_tab, intptr_to_pointer(fd));
85 }
86 pipe_mutex_unlock(etna_screen_mutex);
87
88 if (destroy) {
89 pscreen->destroy = screen->winsys_priv;
90 pscreen->destroy(pscreen);
91 }
92 }
93
hash_fd(void * key)94 static unsigned hash_fd(void *key)
95 {
96 int fd = pointer_to_intptr(key);
97 struct stat stat;
98
99 fstat(fd, &stat);
100
101 return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
102 }
103
compare_fd(void * key1,void * key2)104 static int compare_fd(void *key1, void *key2)
105 {
106 int fd1 = pointer_to_intptr(key1);
107 int fd2 = pointer_to_intptr(key2);
108 struct stat stat1, stat2;
109
110 fstat(fd1, &stat1);
111 fstat(fd2, &stat2);
112
113 return stat1.st_dev != stat2.st_dev ||
114 stat1.st_ino != stat2.st_ino ||
115 stat1.st_rdev != stat2.st_rdev;
116 }
117
118 struct pipe_screen *
etna_drm_screen_create_renderonly(struct renderonly * ro)119 etna_drm_screen_create_renderonly(struct renderonly *ro)
120 {
121 struct pipe_screen *pscreen = NULL;
122
123 pipe_mutex_lock(etna_screen_mutex);
124 if (!etna_tab) {
125 etna_tab = util_hash_table_create(hash_fd, compare_fd);
126 if (!etna_tab)
127 goto unlock;
128 }
129
130 pscreen = util_hash_table_get(etna_tab, intptr_to_pointer(ro->gpu_fd));
131 if (pscreen) {
132 etna_screen(pscreen)->refcnt++;
133 } else {
134 pscreen = screen_create(ro);
135 if (pscreen) {
136 int fd = etna_device_fd(etna_screen(pscreen)->dev);
137 util_hash_table_set(etna_tab, intptr_to_pointer(fd), pscreen);
138
139 /* Bit of a hack, to avoid circular linkage dependency,
140 * ie. pipe driver having to call in to winsys, we
141 * override the pipe drivers screen->destroy() */
142 etna_screen(pscreen)->winsys_priv = pscreen->destroy;
143 pscreen->destroy = etna_drm_screen_destroy;
144 }
145 }
146
147 unlock:
148 pipe_mutex_unlock(etna_screen_mutex);
149 return pscreen;
150 }
151
152 struct pipe_screen *
etna_drm_screen_create(int fd)153 etna_drm_screen_create(int fd)
154 {
155 struct renderonly ro = {
156 .create_for_resource = renderonly_create_gpu_import_for_resource,
157 .kms_fd = -1,
158 .gpu_fd = fd
159 };
160
161 return etna_drm_screen_create_renderonly(&ro);
162 }
163