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#if HAVE_FREEDRENO_VIRTIO
38struct fd_device *virtio_device_new(int fd, drmVersionPtr version);
39#endif
40
41struct fd_device *
42fd_device_new(int fd)
43{
44   struct fd_device *dev = NULL;
45   drmVersionPtr version;
46
47   /* figure out if we are kgsl or msm drm driver: */
48   version = drmGetVersion(fd);
49   if (!version) {
50      ERROR_MSG("cannot get version: %s", strerror(errno));
51      return NULL;
52   }
53
54   if (!strcmp(version->name, "msm")) {
55      DEBUG_MSG("msm DRM device");
56      if (version->version_major != 1) {
57         ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
58                   version->version_minor, version->version_patchlevel);
59         goto out;
60      }
61
62      dev = msm_device_new(fd, version);
63#if HAVE_FREEDRENO_VIRTIO
64   } else if (!strcmp(version->name, "virtio_gpu")) {
65      DEBUG_MSG("virtio_gpu DRM device");
66      dev = virtio_device_new(fd, version);
67#endif
68#if HAVE_FREEDRENO_KGSL
69   } else if (!strcmp(version->name, "kgsl")) {
70      DEBUG_MSG("kgsl DRM device");
71      dev = kgsl_device_new(fd);
72#endif
73   }
74
75   if (!dev) {
76      INFO_MSG("unsupported device: %s", version->name);
77      goto out;
78   }
79
80out:
81   drmFreeVersion(version);
82
83   if (!dev)
84      return NULL;
85
86   p_atomic_set(&dev->refcnt, 1);
87   dev->fd = fd;
88   dev->handle_table =
89      _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
90   dev->name_table =
91      _mesa_hash_table_create(NULL, _mesa_hash_u32, _mesa_key_u32_equal);
92   fd_bo_cache_init(&dev->bo_cache, false);
93   fd_bo_cache_init(&dev->ring_cache, true);
94
95   list_inithead(&dev->deferred_submits);
96   simple_mtx_init(&dev->submit_lock, mtx_plain);
97   simple_mtx_init(&dev->suballoc_lock, mtx_plain);
98
99   return dev;
100}
101
102/* like fd_device_new() but creates it's own private dup() of the fd
103 * which is close()d when the device is finalized.
104 */
105struct fd_device *
106fd_device_new_dup(int fd)
107{
108   int dup_fd = os_dupfd_cloexec(fd);
109   struct fd_device *dev = fd_device_new(dup_fd);
110   if (dev)
111      dev->closefd = 1;
112   else
113      close(dup_fd);
114   return dev;
115}
116
117/* Convenience helper to open the drm device and return new fd_device:
118 */
119struct fd_device *
120fd_device_open(void)
121{
122   int fd;
123
124   fd = drmOpenWithType("msm", NULL, DRM_NODE_RENDER);
125#if HAVE_FREEDRENO_VIRTIO
126   if (fd < 0)
127      fd = drmOpenWithType("virtio_gpu", NULL, DRM_NODE_RENDER);
128#endif
129   if (fd < 0)
130      return NULL;
131
132   return fd_device_new(fd);
133}
134
135struct fd_device *
136fd_device_ref(struct fd_device *dev)
137{
138   p_atomic_inc(&dev->refcnt);
139   return dev;
140}
141
142void
143fd_device_purge(struct fd_device *dev)
144{
145   simple_mtx_lock(&table_lock);
146   fd_bo_cache_cleanup(&dev->bo_cache, 0);
147   fd_bo_cache_cleanup(&dev->ring_cache, 0);
148   simple_mtx_unlock(&table_lock);
149}
150
151static void
152fd_device_del_impl(struct fd_device *dev)
153{
154   simple_mtx_assert_locked(&table_lock);
155
156   assert(list_is_empty(&dev->deferred_submits));
157
158   if (dev->suballoc_bo)
159      fd_bo_del_locked(dev->suballoc_bo);
160
161   fd_bo_cache_cleanup(&dev->bo_cache, 0);
162   fd_bo_cache_cleanup(&dev->ring_cache, 0);
163
164   /* Needs to be after bo cache cleanup in case backend has a
165    * util_vma_heap that it destroys:
166    */
167   dev->funcs->destroy(dev);
168
169   _mesa_hash_table_destroy(dev->handle_table, NULL);
170   _mesa_hash_table_destroy(dev->name_table, NULL);
171
172   if (util_queue_is_initialized(&dev->submit_queue))
173      util_queue_destroy(&dev->submit_queue);
174
175   if (dev->closefd)
176      close(dev->fd);
177
178   free(dev);
179}
180
181void
182fd_device_del_locked(struct fd_device *dev)
183{
184   if (!p_atomic_dec_zero(&dev->refcnt))
185      return;
186   fd_device_del_impl(dev);
187}
188
189void
190fd_device_del(struct fd_device *dev)
191{
192   if (!p_atomic_dec_zero(&dev->refcnt))
193      return;
194   simple_mtx_lock(&table_lock);
195   fd_device_del_impl(dev);
196   simple_mtx_unlock(&table_lock);
197}
198
199int
200fd_device_fd(struct fd_device *dev)
201{
202   return dev->fd;
203}
204
205enum fd_version
206fd_device_version(struct fd_device *dev)
207{
208   return dev->version;
209}
210
211DEBUG_GET_ONCE_BOOL_OPTION(libgl, "LIBGL_DEBUG", false)
212
213bool
214fd_dbg(void)
215{
216   return debug_get_option_libgl();
217}
218
219bool
220fd_has_syncobj(struct fd_device *dev)
221{
222   uint64_t value;
223   if (drmGetCap(dev->fd, DRM_CAP_SYNCOBJ, &value))
224      return false;
225   return value && dev->version >= FD_VERSION_FENCE_FD;
226}
227