iwmc3200wifi: Add new Intel Wireless Multicomm 802.11 driver
[linux-2.6.git] / drivers / net / wireless / iwmc3200wifi / debugfs.c
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/kernel.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27
28 #include "iwm.h"
29 #include "bus.h"
30 #include "rx.h"
31 #include "debug.h"
32
33 static struct {
34         u8 id;
35         char *name;
36 } iwm_debug_module[__IWM_DM_NR] = {
37          {IWM_DM_BOOT, "boot"},
38          {IWM_DM_FW,   "fw"},
39          {IWM_DM_SDIO, "sdio"},
40          {IWM_DM_NTF,  "ntf"},
41          {IWM_DM_RX,   "rx"},
42          {IWM_DM_TX,   "tx"},
43          {IWM_DM_MLME, "mlme"},
44          {IWM_DM_CMD,  "cmd"},
45          {IWM_DM_WEXT,  "wext"},
46 };
47
48 #define add_dbg_module(dbg, name, id, initlevel)        \
49 do {                                                    \
50         struct dentry *d;                               \
51         dbg.dbg_module[id] = (initlevel);               \
52         d = debugfs_create_x8(name, 0600, dbg.dbgdir,   \
53                              &(dbg.dbg_module[id]));    \
54         if (!IS_ERR(d))                                 \
55                 dbg.dbg_module_dentries[id] = d;        \
56 } while (0)
57
58 static int iwm_debugfs_u32_read(void *data, u64 *val)
59 {
60         struct iwm_priv *iwm = data;
61
62         *val = iwm->dbg.dbg_level;
63         return 0;
64 }
65
66 static int iwm_debugfs_dbg_level_write(void *data, u64 val)
67 {
68         struct iwm_priv *iwm = data;
69         int i;
70
71         iwm->dbg.dbg_level = val;
72
73         for (i = 0; i < __IWM_DM_NR; i++)
74                 iwm->dbg.dbg_module[i] = val;
75
76         return 0;
77 }
78 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
79                         iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
80                         "%llu\n");
81
82 static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
83 {
84         struct iwm_priv *iwm = data;
85         int i, bit;
86
87         iwm->dbg.dbg_modules = val;
88
89         for (i = 0; i < __IWM_DM_NR; i++)
90                 iwm->dbg.dbg_module[i] = 0;
91
92         for_each_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
93                 iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;
94
95         return 0;
96 }
97 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
98                         iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
99                         "%llu\n");
100
101 static int iwm_txrx_open(struct inode *inode, struct file *filp)
102 {
103         filp->private_data = inode->i_private;
104         return 0;
105 }
106
107
108 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
109                                    size_t count, loff_t *ppos)
110 {
111         struct iwm_priv *iwm = filp->private_data;
112         char *buf;
113         int i, buf_len = 4096;
114         size_t len = 0;
115         ssize_t ret;
116
117         if (*ppos != 0)
118                 return 0;
119         if (count < sizeof(buf))
120                 return -ENOSPC;
121
122         buf = kzalloc(buf_len, GFP_KERNEL);
123         if (!buf)
124                 return -ENOMEM;
125
126         for (i = 0; i < IWM_TX_QUEUES; i++) {
127                 struct iwm_tx_queue *txq = &iwm->txq[i];
128                 struct sk_buff *skb;
129                 int j;
130                 unsigned long flags;
131
132                 spin_lock_irqsave(&txq->queue.lock, flags);
133
134                 skb = (struct sk_buff *)&txq->queue;
135
136                 len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
137                 len += snprintf(buf + len, buf_len - len, "\tStopped:     %d\n",
138                                 __netif_subqueue_stopped(iwm_to_ndev(iwm),
139                                                          txq->id));
140                 len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
141                                 txq->concat_count);
142                 len += snprintf(buf + len, buf_len - len, "\tQueue len:   %d\n",
143                                 skb_queue_len(&txq->queue));
144                 for (j = 0; j < skb_queue_len(&txq->queue); j++) {
145                         struct iwm_tx_info *tx_info;
146
147                         skb = skb->next;
148                         tx_info = skb_to_tx_info(skb);
149
150                         len += snprintf(buf + len, buf_len - len,
151                                         "\tSKB #%d\n", j);
152                         len += snprintf(buf + len, buf_len - len,
153                                         "\t\tsta:   %d\n", tx_info->sta);
154                         len += snprintf(buf + len, buf_len - len,
155                                         "\t\tcolor: %d\n", tx_info->color);
156                         len += snprintf(buf + len, buf_len - len,
157                                         "\t\ttid:   %d\n", tx_info->tid);
158                 }
159
160                 spin_unlock_irqrestore(&txq->queue.lock, flags);
161         }
162
163         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
164         kfree(buf);
165
166         return ret;
167 }
168
169 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
170                                           char __user *buffer,
171                                           size_t count, loff_t *ppos)
172 {
173         struct iwm_priv *iwm = filp->private_data;
174         struct iwm_tx_credit *credit = &iwm->tx_credit;
175         char *buf;
176         int i, buf_len = 4096;
177         size_t len = 0;
178         ssize_t ret;
179
180         if (*ppos != 0)
181                 return 0;
182         if (count < sizeof(buf))
183                 return -ENOSPC;
184
185         buf = kzalloc(buf_len, GFP_KERNEL);
186         if (!buf)
187                 return -ENOMEM;
188
189         len += snprintf(buf + len, buf_len - len,
190                         "NR pools:  %d\n", credit->pool_nr);
191         len += snprintf(buf + len, buf_len - len,
192                         "pools map: 0x%lx\n", credit->full_pools_map);
193
194         len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
195         for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
196                 len += snprintf(buf + len, buf_len - len,
197                                 "pools entry #%d\n", i);
198                 len += snprintf(buf + len, buf_len - len,
199                                 "\tid:          %d\n",
200                                 credit->pools[i].id);
201                 len += snprintf(buf + len, buf_len - len,
202                                 "\tsid:         %d\n",
203                                 credit->pools[i].sid);
204                 len += snprintf(buf + len, buf_len - len,
205                                 "\tmin_pages:   %d\n",
206                                 credit->pools[i].min_pages);
207                 len += snprintf(buf + len, buf_len - len,
208                                 "\tmax_pages:   %d\n",
209                                 credit->pools[i].max_pages);
210                 len += snprintf(buf + len, buf_len - len,
211                                 "\talloc_pages: %d\n",
212                                 credit->pools[i].alloc_pages);
213                 len += snprintf(buf + len, buf_len - len,
214                                 "\tfreed_pages: %d\n",
215                                 credit->pools[i].total_freed_pages);
216         }
217
218         len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
219         for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
220                 len += snprintf(buf + len, buf_len - len,
221                                 "spools entry #%d\n", i);
222                 len += snprintf(buf + len, buf_len - len,
223                                 "\tid:          %d\n",
224                                 credit->spools[i].id);
225                 len += snprintf(buf + len, buf_len - len,
226                                 "\tmax_pages:   %d\n",
227                                 credit->spools[i].max_pages);
228                 len += snprintf(buf + len, buf_len - len,
229                                 "\talloc_pages: %d\n",
230                                 credit->spools[i].alloc_pages);
231
232         }
233
234         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
235         kfree(buf);
236
237         return ret;
238 }
239
240 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
241                                           char __user *buffer,
242                                           size_t count, loff_t *ppos)
243 {
244         struct iwm_priv *iwm = filp->private_data;
245         struct iwm_rx_ticket_node *ticket, *next;
246         char *buf;
247         int buf_len = 4096, i;
248         size_t len = 0;
249         ssize_t ret;
250
251         if (*ppos != 0)
252                 return 0;
253         if (count < sizeof(buf))
254                 return -ENOSPC;
255
256         buf = kzalloc(buf_len, GFP_KERNEL);
257         if (!buf)
258                 return -ENOMEM;
259
260         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
261                 len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
262                                 ticket->ticket->id);
263                 len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
264                                 ticket->ticket->action);
265                 len += snprintf(buf + len, buf_len - len, "\tflags:  0x%x\n",
266                                 ticket->ticket->flags);
267         }
268
269         for (i = 0; i < IWM_RX_ID_HASH; i++) {
270                 struct iwm_rx_packet *packet, *nxt;
271                 struct list_head *pkt_list = &iwm->rx_packets[i];
272                 if (!list_empty(pkt_list)) {
273                         len += snprintf(buf + len, buf_len - len,
274                                         "Packet hash #%d\n", i);
275                         list_for_each_entry_safe(packet, nxt, pkt_list, node) {
276                                 len += snprintf(buf + len, buf_len - len,
277                                                 "\tPacket id:     %d\n",
278                                                 packet->id);
279                                 len += snprintf(buf + len, buf_len - len,
280                                                 "\tPacket length: %lu\n",
281                                                 packet->pkt_size);
282                         }
283                 }
284         }
285
286         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
287         kfree(buf);
288
289         return ret;
290 }
291
292
293 static const struct file_operations iwm_debugfs_txq_fops = {
294         .owner =        THIS_MODULE,
295         .open =         iwm_txrx_open,
296         .read =         iwm_debugfs_txq_read,
297 };
298
299 static const struct file_operations iwm_debugfs_tx_credit_fops = {
300         .owner =        THIS_MODULE,
301         .open =         iwm_txrx_open,
302         .read =         iwm_debugfs_tx_credit_read,
303 };
304
305 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
306         .owner =        THIS_MODULE,
307         .open =         iwm_txrx_open,
308         .read =         iwm_debugfs_rx_ticket_read,
309 };
310
311 int iwm_debugfs_init(struct iwm_priv *iwm)
312 {
313         int i, result;
314         char devdir[16];
315
316         iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
317         result = PTR_ERR(iwm->dbg.rootdir);
318         if (!result || IS_ERR(iwm->dbg.rootdir)) {
319                 if (result == -ENODEV) {
320                         IWM_ERR(iwm, "DebugFS (CONFIG_DEBUG_FS) not "
321                                 "enabled in kernel config\n");
322                         result = 0;     /* No debugfs support */
323                 }
324                 IWM_ERR(iwm, "Couldn't create rootdir: %d\n", result);
325                 goto error;
326         }
327
328         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(iwm_to_wiphy(iwm)));
329
330         iwm->dbg.devdir = debugfs_create_dir(devdir, iwm->dbg.rootdir);
331         result = PTR_ERR(iwm->dbg.devdir);
332         if (IS_ERR(iwm->dbg.devdir) && (result != -ENODEV)) {
333                 IWM_ERR(iwm, "Couldn't create devdir: %d\n", result);
334                 goto error;
335         }
336
337         iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
338         result = PTR_ERR(iwm->dbg.dbgdir);
339         if (IS_ERR(iwm->dbg.dbgdir) && (result != -ENODEV)) {
340                 IWM_ERR(iwm, "Couldn't create dbgdir: %d\n", result);
341                 goto error;
342         }
343
344         iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
345         result = PTR_ERR(iwm->dbg.rxdir);
346         if (IS_ERR(iwm->dbg.rxdir) && (result != -ENODEV)) {
347                 IWM_ERR(iwm, "Couldn't create rx dir: %d\n", result);
348                 goto error;
349         }
350
351         iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
352         result = PTR_ERR(iwm->dbg.txdir);
353         if (IS_ERR(iwm->dbg.txdir) && (result != -ENODEV)) {
354                 IWM_ERR(iwm, "Couldn't create tx dir: %d\n", result);
355                 goto error;
356         }
357
358         iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
359         result = PTR_ERR(iwm->dbg.busdir);
360         if (IS_ERR(iwm->dbg.busdir) && (result != -ENODEV)) {
361                 IWM_ERR(iwm, "Couldn't create bus dir: %d\n", result);
362                 goto error;
363         }
364
365         if (iwm->bus_ops->debugfs_init) {
366                 result = iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);
367                 if (result < 0) {
368                         IWM_ERR(iwm, "Couldn't create bus entry: %d\n", result);
369                         goto error;
370                 }
371         }
372
373
374         iwm->dbg.dbg_level = IWM_DL_NONE;
375         iwm->dbg.dbg_level_dentry =
376                 debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
377                                     &fops_iwm_dbg_level);
378         result = PTR_ERR(iwm->dbg.dbg_level_dentry);
379         if (IS_ERR(iwm->dbg.dbg_level_dentry) && (result != -ENODEV)) {
380                 IWM_ERR(iwm, "Couldn't create dbg_level: %d\n", result);
381                 goto error;
382         }
383
384
385         iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
386         iwm->dbg.dbg_modules_dentry =
387                 debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
388                                     &fops_iwm_dbg_modules);
389         result = PTR_ERR(iwm->dbg.dbg_modules_dentry);
390         if (IS_ERR(iwm->dbg.dbg_modules_dentry) && (result != -ENODEV)) {
391                 IWM_ERR(iwm, "Couldn't create dbg_modules: %d\n", result);
392                 goto error;
393         }
394
395         for (i = 0; i < __IWM_DM_NR; i++)
396                 add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
397                                iwm_debug_module[i].id, IWM_DL_DEFAULT);
398
399         iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
400                                                   iwm->dbg.txdir, iwm,
401                                                   &iwm_debugfs_txq_fops);
402         result = PTR_ERR(iwm->dbg.txq_dentry);
403         if (IS_ERR(iwm->dbg.txq_dentry) && (result != -ENODEV)) {
404                 IWM_ERR(iwm, "Couldn't create tx queue: %d\n", result);
405                 goto error;
406         }
407
408         iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
409                                                    iwm->dbg.txdir, iwm,
410                                                    &iwm_debugfs_tx_credit_fops);
411         result = PTR_ERR(iwm->dbg.tx_credit_dentry);
412         if (IS_ERR(iwm->dbg.tx_credit_dentry) && (result != -ENODEV)) {
413                 IWM_ERR(iwm, "Couldn't create tx credit: %d\n", result);
414                 goto error;
415         }
416
417         iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
418                                                   iwm->dbg.rxdir, iwm,
419                                                   &iwm_debugfs_rx_ticket_fops);
420         result = PTR_ERR(iwm->dbg.rx_ticket_dentry);
421         if (IS_ERR(iwm->dbg.rx_ticket_dentry) && (result != -ENODEV)) {
422                 IWM_ERR(iwm, "Couldn't create rx ticket: %d\n", result);
423                 goto error;
424         }
425
426         return 0;
427
428  error:
429         return result;
430 }
431
432 void iwm_debugfs_exit(struct iwm_priv *iwm)
433 {
434         int i;
435
436         for (i = 0; i < __IWM_DM_NR; i++)
437                 debugfs_remove(iwm->dbg.dbg_module_dentries[i]);
438
439         debugfs_remove(iwm->dbg.dbg_modules_dentry);
440         debugfs_remove(iwm->dbg.dbg_level_dentry);
441         debugfs_remove(iwm->dbg.txq_dentry);
442         debugfs_remove(iwm->dbg.tx_credit_dentry);
443         debugfs_remove(iwm->dbg.rx_ticket_dentry);
444         if (iwm->bus_ops->debugfs_exit)
445                 iwm->bus_ops->debugfs_exit(iwm);
446
447         debugfs_remove(iwm->dbg.busdir);
448         debugfs_remove(iwm->dbg.dbgdir);
449         debugfs_remove(iwm->dbg.txdir);
450         debugfs_remove(iwm->dbg.rxdir);
451         debugfs_remove(iwm->dbg.devdir);
452         debugfs_remove(iwm->dbg.rootdir);
453 }