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/drm/drmP.h"
33#include "dev/drm/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	if ( !info )
69		return 1;
70	dev->sysctl = info;
71
72	/* Add the sysctl node for DRI if it doesn't already exist */
73	drioid = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(&sysctl___hw), OID_AUTO, "dri", CTLFLAG_RW, NULL, "DRI Graphics");
74	if (!drioid)
75		return 1;
76
77	/* Find the next free slot under hw.dri */
78	i = 0;
79	SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
80		if (i <= oid->oid_arg2)
81			i = oid->oid_arg2 + 1;
82	}
83	if (i>9)
84		return 1;
85
86	/* Add the hw.dri.x for our device */
87	info->name[0] = '0' + i;
88	info->name[1] = 0;
89	top = SYSCTL_ADD_NODE( &info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL);
90	if (!top)
91		return 1;
92
93	for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
94		oid = SYSCTL_ADD_OID(&info->ctx,
95			SYSCTL_CHILDREN(top),
96			OID_AUTO,
97			drm_sysctl_list[i].name,
98			CTLTYPE_STRING | CTLFLAG_RD,
99			dev,
100			0,
101			drm_sysctl_list[i].f,
102			"A",
103			NULL);
104		if (!oid)
105			return 1;
106	}
107	SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(top), OID_AUTO, "debug",
108	    CTLFLAG_RW, &drm_debug_flag, sizeof(drm_debug_flag),
109	    "Enable debugging output");
110
111	return 0;
112}
113
114int drm_sysctl_cleanup(struct drm_device *dev)
115{
116	int error;
117	error = sysctl_ctx_free( &dev->sysctl->ctx );
118
119	free(dev->sysctl, DRM_MEM_DRIVER);
120	dev->sysctl = NULL;
121
122	return error;
123}
124
125#define DRM_SYSCTL_PRINT(fmt, arg...)				\
126do {								\
127	snprintf(buf, sizeof(buf), fmt, ##arg);			\
128	retcode = SYSCTL_OUT(req, buf, strlen(buf));		\
129	if (retcode)						\
130		goto done;					\
131} while (0)
132
133static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
134{
135	struct drm_device *dev = arg1;
136	char buf[128];
137	int retcode;
138	int hasunique = 0;
139
140	DRM_SYSCTL_PRINT("%s 0x%jx", dev->driver->name,
141	    (uintmax_t)dev2udev(dev->devnode));
142
143	DRM_LOCK();
144	if (dev->unique) {
145		snprintf(buf, sizeof(buf), " %s", dev->unique);
146		hasunique = 1;
147	}
148	DRM_UNLOCK();
149
150	if (hasunique)
151		SYSCTL_OUT(req, buf, strlen(buf));
152
153	SYSCTL_OUT(req, "", 1);
154
155done:
156	return retcode;
157}
158
159static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
160{
161	struct drm_device *dev = arg1;
162	drm_local_map_t *map, *tempmaps;
163	const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
164	const char *type, *yesno;
165	int i, mapcount;
166	char buf[128];
167	int retcode;
168
169	/* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
170	 * temporary copy of all the map entries and then SYSCTL_OUT that.
171	 */
172	DRM_LOCK();
173
174	mapcount = 0;
175	TAILQ_FOREACH(map, &dev->maplist, link)
176		mapcount++;
177
178	tempmaps = malloc(sizeof(drm_local_map_t) * mapcount, DRM_MEM_DRIVER,
179	    M_NOWAIT);
180	if (tempmaps == NULL) {
181		DRM_UNLOCK();
182		return ENOMEM;
183	}
184
185	i = 0;
186	TAILQ_FOREACH(map, &dev->maplist, link)
187		tempmaps[i++] = *map;
188
189	DRM_UNLOCK();
190
191	DRM_SYSCTL_PRINT("\nslot offset	        size       "
192	    "type flags address            handle mtrr\n");
193
194	for (i = 0; i < mapcount; i++) {
195		map = &tempmaps[i];
196
197		if (map->type > 4)
198			type = "??";
199		else
200			type = types[map->type];
201
202		if (!map->mtrr)
203			yesno = "no";
204		else
205			yesno = "yes";
206
207		DRM_SYSCTL_PRINT(
208		    "%4d 0x%016lx 0x%08lx %4.4s  0x%02x 0x%016lx %6d %s\n",
209		    i, map->offset, map->size, type, map->flags,
210		    (unsigned long)map->virtual,
211		    (unsigned int)((unsigned long)map->handle >>
212		    DRM_MAP_HANDLE_SHIFT), yesno);
213	}
214	SYSCTL_OUT(req, "", 1);
215
216done:
217	free(tempmaps, DRM_MEM_DRIVER);
218	return retcode;
219}
220
221static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
222{
223	struct drm_device	 *dev = arg1;
224	drm_device_dma_t *dma = dev->dma;
225	drm_device_dma_t tempdma;
226	int *templists;
227	int i;
228	char buf[128];
229	int retcode;
230
231	/* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
232	 * copy of the whole structure and the relevant data from buflist.
233	 */
234	DRM_LOCK();
235	if (dma == NULL) {
236		DRM_UNLOCK();
237		return 0;
238	}
239	DRM_SPINLOCK(&dev->dma_lock);
240	tempdma = *dma;
241	templists = malloc(sizeof(int) * dma->buf_count, DRM_MEM_DRIVER,
242	    M_NOWAIT);
243	for (i = 0; i < dma->buf_count; i++)
244		templists[i] = dma->buflist[i]->list;
245	dma = &tempdma;
246	DRM_SPINUNLOCK(&dev->dma_lock);
247	DRM_UNLOCK();
248
249	DRM_SYSCTL_PRINT("\n o     size count  free	 segs pages    kB\n");
250	for (i = 0; i <= DRM_MAX_ORDER; i++) {
251		if (dma->bufs[i].buf_count)
252			DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
253				       i,
254				       dma->bufs[i].buf_size,
255				       dma->bufs[i].buf_count,
256				       atomic_read(&dma->bufs[i]
257						   .freelist.count),
258				       dma->bufs[i].seg_count,
259				       dma->bufs[i].seg_count
260				       *(1 << dma->bufs[i].page_order),
261				       (dma->bufs[i].seg_count
262					* (1 << dma->bufs[i].page_order))
263				       * (int)PAGE_SIZE / 1024);
264	}
265	DRM_SYSCTL_PRINT("\n");
266	for (i = 0; i < dma->buf_count; i++) {
267		if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
268		DRM_SYSCTL_PRINT(" %d", templists[i]);
269	}
270	DRM_SYSCTL_PRINT("\n");
271
272	SYSCTL_OUT(req, "", 1);
273done:
274	free(templists, DRM_MEM_DRIVER);
275	return retcode;
276}
277
278static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
279{
280	struct drm_device *dev = arg1;
281	struct drm_file *priv, *tempprivs;
282	char buf[128];
283	int retcode;
284	int privcount, i;
285
286	DRM_LOCK();
287
288	privcount = 0;
289	TAILQ_FOREACH(priv, &dev->files, link)
290		privcount++;
291
292	tempprivs = malloc(sizeof(struct drm_file) * privcount, DRM_MEM_DRIVER,
293	    M_NOWAIT);
294	if (tempprivs == NULL) {
295		DRM_UNLOCK();
296		return ENOMEM;
297	}
298	i = 0;
299	TAILQ_FOREACH(priv, &dev->files, link)
300		tempprivs[i++] = *priv;
301
302	DRM_UNLOCK();
303
304	DRM_SYSCTL_PRINT(
305	    "\na dev            pid   uid      magic     ioctls\n");
306	for (i = 0; i < privcount; i++) {
307		priv = &tempprivs[i];
308		DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
309			       priv->authenticated ? 'y' : 'n',
310			       devtoname(priv->dev->devnode),
311			       priv->pid,
312			       priv->uid,
313			       priv->magic,
314			       priv->ioctl_count);
315	}
316
317	SYSCTL_OUT(req, "", 1);
318done:
319	free(tempprivs, DRM_MEM_DRIVER);
320	return retcode;
321}
322
323static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
324{
325	struct drm_device *dev = arg1;
326	char buf[128];
327	int retcode;
328	int i;
329
330	DRM_SYSCTL_PRINT("\ncrtc ref count    last     enabled inmodeset\n");
331	for(i = 0 ; i < dev->num_crtcs ; i++) {
332		DRM_SYSCTL_PRINT("  %02d  %02d %08d %08d %02d      %02d\n",
333		    i, atomic_load_acq_32(&dev->vblank[i].refcount),
334		    atomic_load_acq_32(&dev->vblank[i].count),
335		    atomic_load_acq_32(&dev->vblank[i].last),
336		    atomic_load_acq_int(&dev->vblank[i].enabled),
337		    atomic_load_acq_int(&dev->vblank[i].inmodeset));
338	}
339
340	SYSCTL_OUT(req, "", -1);
341done:
342	return retcode;
343}
344