drm: Sync vblank handling code with Linux 3.14
[dragonfly.git] / sys / dev / drm / drm_sysctl.c
1 /*-
2  * Copyright 2003 Eric Anholt
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  * 
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  * 
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * ERIC ANHOLT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
20  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * $FreeBSD: src/sys/dev/drm2/drm_sysctl.c,v 1.1 2012/05/22 11:07:44 kib Exp $
24  */
25
26 /** @file drm_sysctl.c
27  * Implementation of various sysctls for controlling DRM behavior and reporting
28  * debug information.
29  */
30
31 #include <sys/conf.h>
32 #include <sys/sysctl.h>
33 #include <sys/types.h>
34
35 #include <drm/drmP.h>
36
37 static int         drm_name_info DRM_SYSCTL_HANDLER_ARGS;
38 static int         drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
39 static int         drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
40 static int         drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
41
42 struct drm_sysctl_list {
43         const char *name;
44         int        (*f) DRM_SYSCTL_HANDLER_ARGS;
45 } drm_sysctl_list[] = {
46         {"name",    drm_name_info},
47         {"vm",      drm_vm_info},
48         {"clients", drm_clients_info},
49         {"bufs",    drm_bufs_info},
50 };
51 #define DRM_SYSCTL_ENTRIES NELEM(drm_sysctl_list)
52
53 int drm_sysctl_init(struct drm_device *dev)
54 {
55         struct drm_sysctl_info *info;
56         struct sysctl_oid *oid;
57         struct sysctl_oid *top, *drioid;
58         int               i;
59
60         info = kmalloc(sizeof *info, M_DRM, M_WAITOK | M_ZERO);
61         if ( !info )
62                 return 1;
63         dev->sysctl = info;
64
65         /* Add the sysctl node for DRI if it doesn't already exist */
66         drioid = SYSCTL_ADD_NODE(&info->ctx, &sysctl__hw_children, OID_AUTO,
67             "dri", CTLFLAG_RW, NULL, "DRI Graphics");
68         if (!drioid)
69                 return 1;
70
71         /* Find the next free slot under hw.dri */
72         i = 0;
73         SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
74                 if (i <= oid->oid_arg2)
75                         i = oid->oid_arg2 + 1;
76         }
77         if (i>9)
78                 return 1;
79         
80         dev->sysctl_node_idx = i;
81         /* Add the hw.dri.x for our device */
82         info->name[0] = '0' + i;
83         info->name[1] = 0;
84         top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
85             OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
86         if (!top)
87                 return 1;
88         
89         for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
90                 oid = SYSCTL_ADD_OID(&info->ctx,
91                         SYSCTL_CHILDREN(top),
92                         OID_AUTO,
93                         drm_sysctl_list[i].name,
94                         CTLTYPE_STRING | CTLFLAG_RD,
95                         dev,
96                         0,
97                         drm_sysctl_list[i].f,
98                         "A",
99                         NULL);
100                 if (!oid)
101                         return 1;
102         }
103         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
104             CTLFLAG_RW, &drm_debug, sizeof(drm_debug),
105             "Enable debugging output");
106         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
107             CTLFLAG_RW, &drm_notyet_flag, sizeof(drm_debug),
108             "Enable notyet reminders");
109
110         if (dev->driver->sysctl_init != NULL)
111                 dev->driver->sysctl_init(dev, &info->ctx, top);
112
113         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
114             "vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
115             sizeof(drm_vblank_offdelay),
116             "");
117         SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
118             "timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
119             sizeof(drm_timestamp_precision),
120             "");
121
122         return (0);
123 }
124
125 int drm_sysctl_cleanup(struct drm_device *dev)
126 {
127         int error;
128
129         error = sysctl_ctx_free(&dev->sysctl->ctx);
130         drm_free(dev->sysctl, M_DRM);
131         dev->sysctl = NULL;
132         if (dev->driver->sysctl_cleanup != NULL)
133                 dev->driver->sysctl_cleanup(dev);
134
135         return (error);
136 }
137
138 #define DRM_SYSCTL_PRINT(fmt, arg...)                           \
139 do {                                                            \
140         ksnprintf(buf, sizeof(buf), fmt, ##arg);                        \
141         retcode = SYSCTL_OUT(req, buf, strlen(buf));            \
142         if (retcode)                                            \
143                 goto done;                                      \
144 } while (0)
145
146 static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
147 {
148         struct drm_device *dev = arg1;
149         char buf[128];
150         int retcode;
151         int hasunique = 0;
152
153         DRM_SYSCTL_PRINT("%s 0x%x", dev->driver->name, dev2udev(dev->devnode));
154         
155         DRM_LOCK(dev);
156         if (dev->unique) {
157                 ksnprintf(buf, sizeof(buf), " %s", dev->unique);
158                 hasunique = 1;
159         }
160         DRM_UNLOCK(dev);
161         
162         if (hasunique)
163                 SYSCTL_OUT(req, buf, strlen(buf));
164
165         SYSCTL_OUT(req, "", 1);
166
167 done:
168         return retcode;
169 }
170
171 /**
172  * Called when "/proc/dri/.../vm" is read.
173  *
174  * Prints information about all mappings in drm_device::maplist.
175  */
176 static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
177 {
178         char buf[128];
179         int retcode;
180         struct drm_device *dev = arg1;
181         struct drm_local_map *map;
182         struct drm_map_list *r_list;
183
184         /* Hardcoded from _DRM_FRAME_BUFFER,
185            _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
186            _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
187         const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
188         const char *type;
189         int i;
190
191         DRM_LOCK(dev);
192         DRM_SYSCTL_PRINT("\nslot offset         size       "
193             "type flags address            handle mtrr\n");
194         i = 0;
195         list_for_each_entry(r_list, &dev->maplist, head) {
196                 map = r_list->map;
197                 if (!map)
198                         continue;
199                 if (map->type < 0 || map->type > 5)
200                         type = "??";
201                 else
202                         type = types[map->type];
203
204                 DRM_SYSCTL_PRINT("%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%08lx ",
205                            i,
206                            (unsigned long long)map->offset,
207                            map->size, type, map->flags,
208                            (unsigned long) r_list->user_token);
209                 if (map->mtrr < 0)
210                         DRM_SYSCTL_PRINT("none\n");
211                 else
212                         DRM_SYSCTL_PRINT("%4d\n", map->mtrr);
213                 i++;
214
215         }
216         SYSCTL_OUT(req, "", 1);
217         DRM_UNLOCK(dev);
218
219 done:
220         return 0;
221 }
222
223 static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
224 {
225         struct drm_device        *dev = arg1;
226         drm_device_dma_t *dma = dev->dma;
227         drm_device_dma_t tempdma;
228         int *templists;
229         int i;
230         char buf[128];
231         int retcode;
232
233         /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
234          * copy of the whole structure and the relevant data from buflist.
235          */
236         DRM_LOCK(dev);
237         if (dma == NULL) {
238                 DRM_UNLOCK(dev);
239                 return 0;
240         }
241         spin_lock(&dev->dma_lock);
242         tempdma = *dma;
243         templists = kmalloc(sizeof(int) * dma->buf_count, M_DRM,
244                             M_WAITOK | M_NULLOK);
245         for (i = 0; i < dma->buf_count; i++)
246                 templists[i] = dma->buflist[i]->list;
247         dma = &tempdma;
248         spin_unlock(&dev->dma_lock);
249         DRM_UNLOCK(dev);
250
251         DRM_SYSCTL_PRINT("\n o     size count  free      segs pages    kB\n");
252         for (i = 0; i <= DRM_MAX_ORDER; i++) {
253                 if (dma->bufs[i].buf_count)
254                         DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
255                                        i,
256                                        dma->bufs[i].buf_size,
257                                        dma->bufs[i].buf_count,
258                                        atomic_read(&dma->bufs[i]
259                                                    .freelist.count),
260                                        dma->bufs[i].seg_count,
261                                        dma->bufs[i].seg_count
262                                        *(1 << dma->bufs[i].page_order),
263                                        (dma->bufs[i].seg_count
264                                         * (1 << dma->bufs[i].page_order))
265                                        * (int)PAGE_SIZE / 1024);
266         }
267         DRM_SYSCTL_PRINT("\n");
268         for (i = 0; i < dma->buf_count; i++) {
269                 if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
270                 DRM_SYSCTL_PRINT(" %d", templists[i]);
271         }
272         DRM_SYSCTL_PRINT("\n");
273
274         SYSCTL_OUT(req, "", 1);
275 done:
276         drm_free(templists, M_DRM);
277         return retcode;
278 }
279
280 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
281 {
282         struct drm_device *dev = arg1;
283         struct drm_file *priv, *tempprivs;
284         char buf[128];
285         int retcode;
286         int privcount, i;
287
288         DRM_LOCK(dev);
289
290         privcount = 0;
291         list_for_each_entry(priv, &dev->filelist, lhead)
292                 privcount++;
293
294         tempprivs = kmalloc(sizeof(struct drm_file) * privcount, M_DRM,
295                             M_WAITOK | M_NULLOK);
296         if (tempprivs == NULL) {
297                 DRM_UNLOCK(dev);
298                 return ENOMEM;
299         }
300         i = 0;
301         list_for_each_entry(priv, &dev->filelist, lhead)
302                 tempprivs[i++] = *priv;
303
304         DRM_UNLOCK(dev);
305
306         DRM_SYSCTL_PRINT(
307             "\na dev            pid   uid      magic     ioctls\n");
308         for (i = 0; i < privcount; i++) {
309                 priv = &tempprivs[i];
310                 DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
311                                priv->authenticated ? 'y' : 'n',
312                                devtoname(priv->dev->devnode),
313                                priv->pid,
314                                priv->uid,
315                                priv->magic,
316                                priv->ioctl_count);
317         }
318
319         SYSCTL_OUT(req, "", 1);
320 done:
321         drm_free(tempprivs, M_DRM);
322         return retcode;
323 }