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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / wireless / iwmc3200wifi / debugfs.c
blob87eef5773a02e35203319f53fa4ff1da58cdf60b
1 /*
2 * Intel Wireless Multicomm 3200 WiFi driver
3 *
4 * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
5 * Samuel Ortiz <samuel.ortiz@intel.com>
6 * Zhu Yi <yi.zhu@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 */
23
24 #include <linux/slab.h>
25 #include <linux/kernel.h>
26 #include <linux/bitops.h>
27 #include <linux/debugfs.h>
28 #include <linux/export.h>
29
30 #include "iwm.h"
31 #include "bus.h"
32 #include "rx.h"
33 #include "debug.h"
34
35 static struct {
36 u8 id;
37 char *name;
38 } iwm_debug_module[__IWM_DM_NR] = {
39 {IWM_DM_BOOT, "boot"},
40 {IWM_DM_FW, "fw"},
41 {IWM_DM_SDIO, "sdio"},
42 {IWM_DM_NTF, "ntf"},
43 {IWM_DM_RX, "rx"},
44 {IWM_DM_TX, "tx"},
45 {IWM_DM_MLME, "mlme"},
46 {IWM_DM_CMD, "cmd"},
47 {IWM_DM_WEXT, "wext"},
48 };
49
50 #define add_dbg_module(dbg, name, id, initlevel) \
51 do { \
52 dbg.dbg_module[id] = (initlevel); \
53 dbg.dbg_module_dentries[id] = \
54 debugfs_create_x8(name, 0600, \
55 dbg.dbgdir, \
56 &(dbg.dbg_module[id])); \
57 } while (0)
58
59 static int iwm_debugfs_u32_read(void *data, u64 *val)
60 {
61 struct iwm_priv *iwm = data;
62
63 *val = iwm->dbg.dbg_level;
64 return 0;
65 }
66
67 static int iwm_debugfs_dbg_level_write(void *data, u64 val)
68 {
69 struct iwm_priv *iwm = data;
70 int i;
71
72 iwm->dbg.dbg_level = val;
73
74 for (i = 0; i < __IWM_DM_NR; i++)
75 iwm->dbg.dbg_module[i] = val;
76
77 return 0;
78 }
79 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
80 iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
81 "%llu\n");
82
83 static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
84 {
85 struct iwm_priv *iwm = data;
86 int i, bit;
87
88 iwm->dbg.dbg_modules = val;
89
90 for (i = 0; i < __IWM_DM_NR; i++)
91 iwm->dbg.dbg_module[i] = 0;
92
93 for_each_set_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
94 iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;
95
96 return 0;
97 }
98 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
99 iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
100 "%llu\n");
101
102 static int iwm_generic_open(struct inode *inode, struct file *filp)
103 {
104 filp->private_data = inode->i_private;
105 return 0;
106 }
107
108
109 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
110 size_t count, loff_t *ppos)
111 {
112 struct iwm_priv *iwm = filp->private_data;
113 char *buf;
114 int i, buf_len = 4096;
115 size_t len = 0;
116 ssize_t ret;
117
118 if (*ppos != 0)
119 return 0;
120 if (count < sizeof(buf))
121 return -ENOSPC;
122
123 buf = kzalloc(buf_len, GFP_KERNEL);
124 if (!buf)
125 return -ENOMEM;
126
127 for (i = 0; i < IWM_TX_QUEUES; i++) {
128 struct iwm_tx_queue *txq = &iwm->txq[i];
129 struct sk_buff *skb;
130 int j;
131 unsigned long flags;
132
133 spin_lock_irqsave(&txq->queue.lock, flags);
134
135 skb = (struct sk_buff *)&txq->queue;
136
137 len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
138 len += snprintf(buf + len, buf_len - len, "\tStopped: %d\n",
139 __netif_subqueue_stopped(iwm_to_ndev(iwm),
140 txq->id));
141 len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
142 txq->concat_count);
143 len += snprintf(buf + len, buf_len - len, "\tQueue len: %d\n",
144 skb_queue_len(&txq->queue));
145 for (j = 0; j < skb_queue_len(&txq->queue); j++) {
146 struct iwm_tx_info *tx_info;
147
148 skb = skb->next;
149 tx_info = skb_to_tx_info(skb);
150
151 len += snprintf(buf + len, buf_len - len,
152 "\tSKB #%d\n", j);
153 len += snprintf(buf + len, buf_len - len,
154 "\t\tsta: %d\n", tx_info->sta);
155 len += snprintf(buf + len, buf_len - len,
156 "\t\tcolor: %d\n", tx_info->color);
157 len += snprintf(buf + len, buf_len - len,
158 "\t\ttid: %d\n", tx_info->tid);
159 }
160
161 spin_unlock_irqrestore(&txq->queue.lock, flags);
162
163 spin_lock_irqsave(&txq->stopped_queue.lock, flags);
164
165 len += snprintf(buf + len, buf_len - len,
166 "\tStopped Queue len: %d\n",
167 skb_queue_len(&txq->stopped_queue));
168 for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
169 struct iwm_tx_info *tx_info;
170
171 skb = skb->next;
172 tx_info = skb_to_tx_info(skb);
173
174 len += snprintf(buf + len, buf_len - len,
175 "\tSKB #%d\n", j);
176 len += snprintf(buf + len, buf_len - len,
177 "\t\tsta: %d\n", tx_info->sta);
178 len += snprintf(buf + len, buf_len - len,
179 "\t\tcolor: %d\n", tx_info->color);
180 len += snprintf(buf + len, buf_len - len,
181 "\t\ttid: %d\n", tx_info->tid);
182 }
183
184 spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
185 }
186
187 ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
188 kfree(buf);
189
190 return ret;
191 }
192
193 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
194 char __user *buffer,
195 size_t count, loff_t *ppos)
196 {
197 struct iwm_priv *iwm = filp->private_data;
198 struct iwm_tx_credit *credit = &iwm->tx_credit;
199 char *buf;
200 int i, buf_len = 4096;
201 size_t len = 0;
202 ssize_t ret;
203
204 if (*ppos != 0)
205 return 0;
206 if (count < sizeof(buf))
207 return -ENOSPC;
208
209 buf = kzalloc(buf_len, GFP_KERNEL);
210 if (!buf)
211 return -ENOMEM;
212
213 len += snprintf(buf + len, buf_len - len,
214 "NR pools: %d\n", credit->pool_nr);
215 len += snprintf(buf + len, buf_len - len,
216 "pools map: 0x%lx\n", credit->full_pools_map);
217
218 len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
219 for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
220 len += snprintf(buf + len, buf_len - len,
221 "pools entry #%d\n", i);
222 len += snprintf(buf + len, buf_len - len,
223 "\tid: %d\n",
224 credit->pools[i].id);
225 len += snprintf(buf + len, buf_len - len,
226 "\tsid: %d\n",
227 credit->pools[i].sid);
228 len += snprintf(buf + len, buf_len - len,
229 "\tmin_pages: %d\n",
230 credit->pools[i].min_pages);
231 len += snprintf(buf + len, buf_len - len,
232 "\tmax_pages: %d\n",
233 credit->pools[i].max_pages);
234 len += snprintf(buf + len, buf_len - len,
235 "\talloc_pages: %d\n",
236 credit->pools[i].alloc_pages);
237 len += snprintf(buf + len, buf_len - len,
238 "\tfreed_pages: %d\n",
239 credit->pools[i].total_freed_pages);
240 }
241
242 len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
243 for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
244 len += snprintf(buf + len, buf_len - len,
245 "spools entry #%d\n", i);
246 len += snprintf(buf + len, buf_len - len,
247 "\tid: %d\n",
248 credit->spools[i].id);
249 len += snprintf(buf + len, buf_len - len,
250 "\tmax_pages: %d\n",
251 credit->spools[i].max_pages);
252 len += snprintf(buf + len, buf_len - len,
253 "\talloc_pages: %d\n",
254 credit->spools[i].alloc_pages);
255
256 }
257
258 ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
259 kfree(buf);
260
261 return ret;
262 }
263
264 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
265 char __user *buffer,
266 size_t count, loff_t *ppos)
267 {
268 struct iwm_priv *iwm = filp->private_data;
269 struct iwm_rx_ticket_node *ticket;
270 char *buf;
271 int buf_len = 4096, i;
272 size_t len = 0;
273 ssize_t ret;
274
275 if (*ppos != 0)
276 return 0;
277 if (count < sizeof(buf))
278 return -ENOSPC;
279
280 buf = kzalloc(buf_len, GFP_KERNEL);
281 if (!buf)
282 return -ENOMEM;
283
284 spin_lock(&iwm->ticket_lock);
285 list_for_each_entry(ticket, &iwm->rx_tickets, node) {
286 len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
287 ticket->ticket->id);
288 len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
289 ticket->ticket->action);
290 len += snprintf(buf + len, buf_len - len, "\tflags: 0x%x\n",
291 ticket->ticket->flags);
292 }
293 spin_unlock(&iwm->ticket_lock);
294
295 for (i = 0; i < IWM_RX_ID_HASH; i++) {
296 struct iwm_rx_packet *packet;
297 struct list_head *pkt_list = &iwm->rx_packets[i];
298
299 if (!list_empty(pkt_list)) {
300 len += snprintf(buf + len, buf_len - len,
301 "Packet hash #%d\n", i);
302 spin_lock(&iwm->packet_lock[i]);
303 list_for_each_entry(packet, pkt_list, node) {
304 len += snprintf(buf + len, buf_len - len,
305 "\tPacket id: %d\n",
306 packet->id);
307 len += snprintf(buf + len, buf_len - len,
308 "\tPacket length: %lu\n",
309 packet->pkt_size);
310 }
311 spin_unlock(&iwm->packet_lock[i]);
312 }
313 }
314
315 ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
316 kfree(buf);
317
318 return ret;
319 }
320
321 static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
322 char __user *buffer,
323 size_t count, loff_t *ppos)
324 {
325
326 struct iwm_priv *iwm = filp->private_data;
327 char buf[512];
328 int buf_len = 512;
329 size_t len = 0;
330
331 if (*ppos != 0)
332 return 0;
333 if (count < sizeof(buf))
334 return -ENOSPC;
335
336 if (!iwm->last_fw_err)
337 return -ENOMEM;
338
339 if (iwm->last_fw_err->line_num == 0)
340 goto out;
341
342 len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
343 (le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
344 ? 'L' : 'U');
345 len += snprintf(buf + len, buf_len - len,
346 "\tCategory: %d\n",
347 le32_to_cpu(iwm->last_fw_err->category));
348
349 len += snprintf(buf + len, buf_len - len,
350 "\tStatus: 0x%x\n",
351 le32_to_cpu(iwm->last_fw_err->status));
352
353 len += snprintf(buf + len, buf_len - len,
354 "\tPC: 0x%x\n",
355 le32_to_cpu(iwm->last_fw_err->pc));
356
357 len += snprintf(buf + len, buf_len - len,
358 "\tblink1: %d\n",
359 le32_to_cpu(iwm->last_fw_err->blink1));
360
361 len += snprintf(buf + len, buf_len - len,
362 "\tblink2: %d\n",
363 le32_to_cpu(iwm->last_fw_err->blink2));
364
365 len += snprintf(buf + len, buf_len - len,
366 "\tilink1: %d\n",
367 le32_to_cpu(iwm->last_fw_err->ilink1));
368
369 len += snprintf(buf + len, buf_len - len,
370 "\tilink2: %d\n",
371 le32_to_cpu(iwm->last_fw_err->ilink2));
372
373 len += snprintf(buf + len, buf_len - len,
374 "\tData1: 0x%x\n",
375 le32_to_cpu(iwm->last_fw_err->data1));
376
377 len += snprintf(buf + len, buf_len - len,
378 "\tData2: 0x%x\n",
379 le32_to_cpu(iwm->last_fw_err->data2));
380
381 len += snprintf(buf + len, buf_len - len,
382 "\tLine number: %d\n",
383 le32_to_cpu(iwm->last_fw_err->line_num));
384
385 len += snprintf(buf + len, buf_len - len,
386 "\tUMAC status: 0x%x\n",
387 le32_to_cpu(iwm->last_fw_err->umac_status));
388
389 len += snprintf(buf + len, buf_len - len,
390 "\tLMAC status: 0x%x\n",
391 le32_to_cpu(iwm->last_fw_err->lmac_status));
392
393 len += snprintf(buf + len, buf_len - len,
394 "\tSDIO status: 0x%x\n",
395 le32_to_cpu(iwm->last_fw_err->sdio_status));
396
397 out:
398
399 return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
400 }
401
402 static const struct file_operations iwm_debugfs_txq_fops = {
403 .owner = THIS_MODULE,
404 .open = iwm_generic_open,
405 .read = iwm_debugfs_txq_read,
406 .llseek = default_llseek,
407 };
408
409 static const struct file_operations iwm_debugfs_tx_credit_fops = {
410 .owner = THIS_MODULE,
411 .open = iwm_generic_open,
412 .read = iwm_debugfs_tx_credit_read,
413 .llseek = default_llseek,
414 };
415
416 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
417 .owner = THIS_MODULE,
418 .open = iwm_generic_open,
419 .read = iwm_debugfs_rx_ticket_read,
420 .llseek = default_llseek,
421 };
422
423 static const struct file_operations iwm_debugfs_fw_err_fops = {
424 .owner = THIS_MODULE,
425 .open = iwm_generic_open,
426 .read = iwm_debugfs_fw_err_read,
427 .llseek = default_llseek,
428 };
429
430 void iwm_debugfs_init(struct iwm_priv *iwm)
431 {
432 int i;
433
434 iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
435 iwm->dbg.devdir = debugfs_create_dir(wiphy_name(iwm_to_wiphy(iwm)),
436 iwm->dbg.rootdir);
437 iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
438 iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
439 iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
440 iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
441 if (iwm->bus_ops->debugfs_init)
442 iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);
443
444 iwm->dbg.dbg_level = IWM_DL_NONE;
445 iwm->dbg.dbg_level_dentry =
446 debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
447 &fops_iwm_dbg_level);
448
449 iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
450 iwm->dbg.dbg_modules_dentry =
451 debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
452 &fops_iwm_dbg_modules);
453
454 for (i = 0; i < __IWM_DM_NR; i++)
455 add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
456 iwm_debug_module[i].id, IWM_DL_DEFAULT);
457
458 iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
459 iwm->dbg.txdir, iwm,
460 &iwm_debugfs_txq_fops);
461 iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
462 iwm->dbg.txdir, iwm,
463 &iwm_debugfs_tx_credit_fops);
464 iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
465 iwm->dbg.rxdir, iwm,
466 &iwm_debugfs_rx_ticket_fops);
467 iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
468 iwm->dbg.dbgdir, iwm,
469 &iwm_debugfs_fw_err_fops);
470 }
471
472 void iwm_debugfs_exit(struct iwm_priv *iwm)
473 {
474 int i;
475
476 for (i = 0; i < __IWM_DM_NR; i++)
477 debugfs_remove(iwm->dbg.dbg_module_dentries[i]);
478
479 debugfs_remove(iwm->dbg.dbg_modules_dentry);
480 debugfs_remove(iwm->dbg.dbg_level_dentry);
481 debugfs_remove(iwm->dbg.txq_dentry);
482 debugfs_remove(iwm->dbg.tx_credit_dentry);
483 debugfs_remove(iwm->dbg.rx_ticket_dentry);
484 debugfs_remove(iwm->dbg.fw_err_dentry);
485 if (iwm->bus_ops->debugfs_exit)
486 iwm->bus_ops->debugfs_exit(iwm);
487
488 debugfs_remove(iwm->dbg.busdir);
489 debugfs_remove(iwm->dbg.dbgdir);
490 debugfs_remove(iwm->dbg.txdir);
491 debugfs_remove(iwm->dbg.rxdir);
492 debugfs_remove(iwm->dbg.devdir);
493 debugfs_remove(iwm->dbg.rootdir);
494 }