1/*
2 * Copyright (C) 2012-2018 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 <unistd.h>
28#include <sys/stat.h>
29#include <sys/types.h>
30
31#include "util/os_file.h"
32
33#include "freedreno_drmif.h"
34#include "freedreno_priv.h"
35
36struct fd_device *msm_device_new(int fd, drmVersionPtr version);
37
38struct fd_device *
39fd_device_new(int fd)
40{
41   struct fd_device *dev;
42   drmVersionPtr version;
43
44   /* figure out if we are kgsl or msm drm driver: */
45   version = drmGetVersion(fd);
46   if (!version) {
47      ERROR_MSG("cannot get version: %s", strerror(errno));
48      return NULL;
49   }
50
51   if (!strcmp(version->name, "msm")) {
52      DEBUG_MSG("msm DRM device");
53      if (version->version_major != 1) {
54         ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
55                   version->version_minor, version->version_patchlevel);
56         dev = NULL;
57         goto out;
58      }
59
60      dev = msm_device_new(fd, version);
61      dev->version = version->version_minor;
62#if HAVE_FREEDRENO_KGSL
63   } else if (!strcmp(version->name, "kgsl")) {
64      DEBUG_MSG("kgsl DRM device");
65      dev = kgsl_device_new(fd);
66#endif
67   } else {
68      ERROR_MSG("unknown device: %s", version->name);
69      dev = NULL;
70   }
71
72out:
73   drmFreeVersion(version);
74
75   if (!dev)
76      return NULL;
77
78   p_atomic_set(&dev->refcnt, 1);
79   dev->fd = fd;
80   dev->handle_table =
81      _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
82   dev->name_table =
83      _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
84   fd_bo_cache_init(&dev->bo_cache, false);
85   fd_bo_cache_init(&dev->ring_cache, true);
86
87   list_inithead(&dev->deferred_submits);
88   simple_mtx_init(&dev->submit_lock, mtx_plain);
89
90   return dev;
91}
92
93/* like fd_device_new() but creates it's own private dup() of the fd
94 * which is close()d when the device is finalized.
95 */
96struct fd_device *
97fd_device_new_dup(int fd)
98{
99   int dup_fd = os_dupfd_cloexec(fd);
100   struct fd_device *dev = fd_device_new(dup_fd);
101   if (dev)
102      dev->closefd = 1;
103   else
104      close(dup_fd);
105   return dev;
106}
107
108struct fd_device *
109fd_device_ref(struct fd_device *dev)
110{
111   p_atomic_inc(&dev->refcnt);
112   return dev;
113}
114
115void
116fd_device_purge(struct fd_device *dev)
117{
118   simple_mtx_lock(&table_lock);
119   fd_bo_cache_cleanup(&dev->bo_cache, 0);
120   fd_bo_cache_cleanup(&dev->ring_cache, 0);
121   simple_mtx_unlock(&table_lock);
122}
123
124static void
125fd_device_del_impl(struct fd_device *dev)
126{
127   int close_fd = dev->closefd ? dev->fd : -1;
128
129   simple_mtx_assert_locked(&table_lock);
130
131   assert(list_is_empty(&dev->deferred_submits));
132
133   fd_bo_cache_cleanup(&dev->bo_cache, 0);
134   fd_bo_cache_cleanup(&dev->ring_cache, 0);
135   _mesa_hash_table_destroy(dev->handle_table, NULL);
136   _mesa_hash_table_destroy(dev->name_table, NULL);
137   dev->funcs->destroy(dev);
138   if (close_fd >= 0)
139      close(close_fd);
140}
141
142void
143fd_device_del_locked(struct fd_device *dev)
144{
145   if (!p_atomic_dec_zero(&dev->refcnt))
146      return;
147   fd_device_del_impl(dev);
148}
149
150void
151fd_device_del(struct fd_device *dev)
152{
153   if (!p_atomic_dec_zero(&dev->refcnt))
154      return;
155   simple_mtx_lock(&table_lock);
156   fd_device_del_impl(dev);
157   simple_mtx_unlock(&table_lock);
158}
159
160int
161fd_device_fd(struct fd_device *dev)
162{
163   return dev->fd;
164}
165
166enum fd_version
167fd_device_version(struct fd_device *dev)
168{
169   return dev->version;
170}
171
172bool
173fd_dbg(void)
174{
175   static int dbg;
176
177   if (!dbg)
178      dbg = getenv("LIBGL_DEBUG") ? 1 : -1;
179
180   return dbg == 1;
181}
182
183bool
184fd_has_syncobj(struct fd_device *dev)
185{
186   uint64_t value;
187   if (drmGetCap(dev->fd, DRM_CAP_SYNCOBJ, &value))
188      return false;
189   return value && dev->version >= FD_VERSION_FENCE_FD;
190}
191