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
24#include <sys/cdefs.h>
25__FBSDID("$FreeBSD$");
26
27/** @file drm_sysctl.c
28 * Implementation of various sysctls for controlling DRM behavior and reporting
29 * debug information.
30 */
31
32#include <dev/drm2/drmP.h>
33#include <dev/drm2/drm.h>
34
35#include <sys/sysctl.h>
36
37static int	   drm_name_info DRM_SYSCTL_HANDLER_ARGS;
38static int	   drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
39static int	   drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
40static int	   drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
41static int	   drm_vblank_info DRM_SYSCTL_HANDLER_ARGS;
42
43struct drm_sysctl_list {
44	const char *name;
45	int	   (*f) DRM_SYSCTL_HANDLER_ARGS;
46} drm_sysctl_list[] = {
47	{"name",    drm_name_info},
48	{"vm",	    drm_vm_info},
49	{"clients", drm_clients_info},
50	{"bufs",    drm_bufs_info},
51	{"vblank",    drm_vblank_info},
52};
53#define DRM_SYSCTL_ENTRIES (sizeof(drm_sysctl_list)/sizeof(drm_sysctl_list[0]))
54
55struct drm_sysctl_info {
56	struct sysctl_ctx_list ctx;
57	char		       name[2];
58};
59
60int drm_sysctl_init(struct drm_device *dev)
61{
62	struct drm_sysctl_info *info;
63	struct sysctl_oid *oid;
64	struct sysctl_oid *top, *drioid;
65	int		  i;
66
67	info = malloc(sizeof *info, DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
68	dev->sysctl = info;
69
70	/* Add the sysctl node for DRI if it doesn't already exist */
71	drioid = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(&sysctl___hw), OID_AUTO,
72	    "dri", CTLFLAG_RW, NULL, "DRI Graphics");
73	if (!drioid) {
74		free(dev->sysctl, DRM_MEM_DRIVER);
75		dev->sysctl = NULL;
76		return (-ENOMEM);
77	}
78
79	/* Find the next free slot under hw.dri */
80	i = 0;
81	SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
82		if (i <= oid->oid_arg2)
83			i = oid->oid_arg2 + 1;
84	}
85	if (i > 9) {
86		drm_sysctl_cleanup(dev);
87		return (-ENOSPC);
88	}
89
90	dev->sysctl_node_idx = i;
91	/* Add the hw.dri.x for our device */
92	info->name[0] = '0' + i;
93	info->name[1] = 0;
94	top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
95	    OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
96	if (!top) {
97		drm_sysctl_cleanup(dev);
98		return (-ENOMEM);
99	}
100
101	for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
102		oid = SYSCTL_ADD_OID(&info->ctx,
103			SYSCTL_CHILDREN(top),
104			OID_AUTO,
105			drm_sysctl_list[i].name,
106			CTLTYPE_STRING | CTLFLAG_RD,
107			dev,
108			0,
109			drm_sysctl_list[i].f,
110			"A",
111			NULL);
112		if (!oid) {
113			drm_sysctl_cleanup(dev);
114			return (-ENOMEM);
115		}
116	}
117	SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
118	    CTLFLAG_RW, &drm_debug, sizeof(drm_debug),
119	    "Enable debugging output");
120	SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
121	    CTLFLAG_RW, &drm_notyet, sizeof(drm_debug),
122	    "Enable notyet reminders");
123
124	if (dev->driver->sysctl_init != NULL)
125		dev->driver->sysctl_init(dev, &info->ctx, top);
126
127	SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
128	    "vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
129	    sizeof(drm_vblank_offdelay),
130	    "");
131	SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
132	    "timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
133	    sizeof(drm_timestamp_precision),
134	    "");
135
136	return (0);
137}
138
139int drm_sysctl_cleanup(struct drm_device *dev)
140{
141	int error;
142
143	if (dev->sysctl == NULL)
144		return (0);
145
146	error = sysctl_ctx_free(&dev->sysctl->ctx);
147	free(dev->sysctl, DRM_MEM_DRIVER);
148	dev->sysctl = NULL;
149	if (dev->driver->sysctl_cleanup != NULL)
150		dev->driver->sysctl_cleanup(dev);
151
152	return (-error);
153}
154
155#define DRM_SYSCTL_PRINT(fmt, arg...)				\
156do {								\
157	snprintf(buf, sizeof(buf), fmt, ##arg);			\
158	retcode = SYSCTL_OUT(req, buf, strlen(buf));		\
159	if (retcode)						\
160		goto done;					\
161} while (0)
162
163static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
164{
165	struct drm_device *dev = arg1;
166	struct drm_minor *minor;
167	struct drm_master *master;
168	char buf[128];
169	int retcode;
170	int hasunique = 0;
171
172	/* FIXME: This still uses primary minor. */
173	minor = dev->primary;
174	DRM_SYSCTL_PRINT("%s 0x%jx", dev->driver->name,
175	    (uintmax_t)dev2udev(minor->device));
176
177	DRM_LOCK(dev);
178	master = minor->master;
179	if (master != NULL && master->unique) {
180		snprintf(buf, sizeof(buf), " %s", master->unique);
181		hasunique = 1;
182	}
183	DRM_UNLOCK(dev);
184
185	if (hasunique)
186		SYSCTL_OUT(req, buf, strlen(buf));
187
188	SYSCTL_OUT(req, "", 1);
189
190done:
191	return retcode;
192}
193
194static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
195{
196	struct drm_device *dev = arg1;
197	struct drm_map_list *entry;
198	struct drm_local_map *map, *tempmaps;
199	const char *types[] = {
200		[_DRM_FRAME_BUFFER] = "FB",
201		[_DRM_REGISTERS] = "REG",
202		[_DRM_SHM] = "SHM",
203		[_DRM_AGP] = "AGP",
204		[_DRM_SCATTER_GATHER] = "SG",
205		[_DRM_CONSISTENT] = "CONS",
206		[_DRM_GEM] = "GEM"
207	};
208	const char *type, *yesno;
209	int i, mapcount;
210	char buf[128];
211	int retcode;
212
213	/* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
214	 * temporary copy of all the map entries and then SYSCTL_OUT that.
215	 */
216	DRM_LOCK(dev);
217
218	mapcount = 0;
219	list_for_each_entry(entry, &dev->maplist, head) {
220		if (entry->map != NULL)
221			mapcount++;
222	}
223
224	tempmaps = malloc(sizeof(*tempmaps) * mapcount, DRM_MEM_DRIVER,
225	    M_NOWAIT);
226	if (tempmaps == NULL) {
227		DRM_UNLOCK(dev);
228		return ENOMEM;
229	}
230
231	i = 0;
232	list_for_each_entry(entry, &dev->maplist, head) {
233		if (entry->map != NULL)
234			tempmaps[i++] = *entry->map;
235	}
236
237	DRM_UNLOCK(dev);
238
239	DRM_SYSCTL_PRINT("\nslot offset	        size       "
240	    "type flags address            mtrr\n");
241
242	for (i = 0; i < mapcount; i++) {
243		map = &tempmaps[i];
244
245		switch(map->type) {
246		default:
247			type = "??";
248			break;
249		case _DRM_FRAME_BUFFER:
250		case _DRM_REGISTERS:
251		case _DRM_SHM:
252		case _DRM_AGP:
253		case _DRM_SCATTER_GATHER:
254		case _DRM_CONSISTENT:
255		case _DRM_GEM:
256			type = types[map->type];
257			break;
258		}
259
260		if (map->mtrr < 0)
261			yesno = "no";
262		else
263			yesno = "yes";
264
265		DRM_SYSCTL_PRINT(
266		    "%4d 0x%016llx 0x%08lx %4.4s  0x%02x 0x%016lx %s\n",
267		    i, (unsigned long long)map->offset, map->size, type,
268		    map->flags, (unsigned long)map->handle, yesno);
269	}
270	SYSCTL_OUT(req, "", 1);
271
272done:
273	free(tempmaps, DRM_MEM_DRIVER);
274	return retcode;
275}
276
277static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
278{
279	struct drm_device	 *dev = arg1;
280	struct drm_device_dma *dma = dev->dma;
281	struct drm_device_dma tempdma;
282	int *templists;
283	int i;
284	char buf[128];
285	int retcode;
286
287	/* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
288	 * copy of the whole structure and the relevant data from buflist.
289	 */
290	DRM_LOCK(dev);
291	if (dma == NULL) {
292		DRM_UNLOCK(dev);
293		return 0;
294	}
295	DRM_SPINLOCK(&dev->dma_lock);
296	tempdma = *dma;
297	templists = malloc(sizeof(int) * dma->buf_count, DRM_MEM_DRIVER,
298	    M_NOWAIT);
299	for (i = 0; i < dma->buf_count; i++)
300		templists[i] = dma->buflist[i]->list;
301	dma = &tempdma;
302	DRM_SPINUNLOCK(&dev->dma_lock);
303	DRM_UNLOCK(dev);
304
305	DRM_SYSCTL_PRINT("\n o     size count  free	 segs pages    kB\n");
306	for (i = 0; i <= DRM_MAX_ORDER; i++) {
307		if (dma->bufs[i].buf_count)
308			DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
309				       i,
310				       dma->bufs[i].buf_size,
311				       dma->bufs[i].buf_count,
312				       atomic_read(&dma->bufs[i]
313						   .freelist.count),
314				       dma->bufs[i].seg_count,
315				       dma->bufs[i].seg_count
316				       *(1 << dma->bufs[i].page_order),
317				       (dma->bufs[i].seg_count
318					* (1 << dma->bufs[i].page_order))
319				       * (int)PAGE_SIZE / 1024);
320	}
321	DRM_SYSCTL_PRINT("\n");
322	for (i = 0; i < dma->buf_count; i++) {
323		if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
324		DRM_SYSCTL_PRINT(" %d", templists[i]);
325	}
326	DRM_SYSCTL_PRINT("\n");
327
328	SYSCTL_OUT(req, "", 1);
329done:
330	free(templists, DRM_MEM_DRIVER);
331	return retcode;
332}
333
334static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
335{
336	struct drm_device *dev = arg1;
337	struct drm_file *priv, *tempprivs;
338	char buf[128];
339	int retcode;
340	int privcount, i;
341
342	DRM_LOCK(dev);
343
344	privcount = 0;
345	list_for_each_entry(priv, &dev->filelist, lhead)
346		privcount++;
347
348	tempprivs = malloc(sizeof(struct drm_file) * privcount, DRM_MEM_DRIVER,
349	    M_NOWAIT);
350	if (tempprivs == NULL) {
351		DRM_UNLOCK(dev);
352		return ENOMEM;
353	}
354	i = 0;
355	list_for_each_entry(priv, &dev->filelist, lhead)
356		tempprivs[i++] = *priv;
357
358	DRM_UNLOCK(dev);
359
360	DRM_SYSCTL_PRINT(
361	    "\na dev            pid   uid      magic     ioctls\n");
362	for (i = 0; i < privcount; i++) {
363		priv = &tempprivs[i];
364		DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
365			       priv->authenticated ? 'y' : 'n',
366			       devtoname(priv->minor->device),
367			       priv->pid,
368			       priv->uid,
369			       priv->magic,
370			       priv->ioctl_count);
371	}
372
373	SYSCTL_OUT(req, "", 1);
374done:
375	free(tempprivs, DRM_MEM_DRIVER);
376	return retcode;
377}
378
379static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
380{
381	struct drm_device *dev = arg1;
382	char buf[128];
383	int retcode;
384	int i;
385
386	DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
387	DRM_LOCK(dev);
388	if (dev->_vblank_count == NULL)
389		goto done;
390	for (i = 0 ; i < dev->num_crtcs ; i++) {
391		DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
392		    i, dev->vblank_refcount[i],
393		    dev->_vblank_count[i],
394		    dev->last_vblank[i],
395		    dev->vblank_enabled[i],
396		    dev->vblank_inmodeset[i]);
397	}
398done:
399	DRM_UNLOCK(dev);
400
401	SYSCTL_OUT(req, "", -1);
402	return retcode;
403}
404