drivers/net/wireless/wl12xx/debugfs.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.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
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * 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 St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include "debugfs.h"
  25
  26 #include <linux/skbuff.h>
  27 #include <linux/slab.h>
  28
  29 #include "wl12xx.h"
  30 #include "acx.h"
  31 #include "ps.h"
  32 #include "io.h"
  33
  34 /* ms */
  35 #define WL1271_DEBUGFS_STATS_LIFETIME 1000
  36
  37 /* debugfs macros idea from mac80211 */
  38 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
  39 static int wl1271_format_buffer(char __user *userbuf, size_t count,
  40                                     loff_t *ppos, char *fmt, ...)
  41 {
  42         va_list args;
  43         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
  44         int res;
  45
  46         va_start(args, fmt);
  47         res = vscnprintf(buf, sizeof(buf), fmt, args);
  48         va_end(args);
  49
  50         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  51 }
  52
  53 #define DEBUGFS_READONLY_FILE(name, fmt, value...)                      \
  54 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  55                             size_t count, loff_t *ppos)                 \
  56 {                                                                       \
  57         struct wl1271 *wl = file->private_data;                         \
  58         return wl1271_format_buffer(userbuf, count, ppos,               \
  59                                     fmt "\n", ##value);                 \
  60 }                                                                       \
  61                                                                         \
  62 static const struct file_operations name## _ops = {                     \
  63         .read = name## _read,                                           \
  64         .open = wl1271_open_file_generic,                               \
  65         .llseek = generic_file_llseek,                                  \
  66 };
  67
  68 #define DEBUGFS_ADD(name, parent)                                       \
  69         entry = debugfs_create_file(#name, 0400, parent,                \
  70                                     wl, &name## _ops);                  \
  71         if (!entry || IS_ERR(entry))                                    \
  72                 goto err;                                               \
  73
  74 #define DEBUGFS_FWSTATS_FILE(sub, name, fmt)                            \
  75 static ssize_t sub## _ ##name## _read(struct file *file,                \
  76                                       char __user *userbuf,             \
  77                                       size_t count, loff_t *ppos)       \
  78 {                                                                       \
  79         struct wl1271 *wl = file->private_data;                         \
  80                                                                         \
  81         wl1271_debugfs_update_stats(wl);                                \
  82                                                                         \
  83         return wl1271_format_buffer(userbuf, count, ppos, fmt "\n",     \
  84                                     wl->stats.fw_stats->sub.name);      \
  85 }                                                                       \
  86                                                                         \
  87 static const struct file_operations sub## _ ##name## _ops = {           \
  88         .read = sub## _ ##name## _read,                                 \
  89         .open = wl1271_open_file_generic,                               \
  90         .llseek = generic_file_llseek,                                  \
  91 };
  92
  93 #define DEBUGFS_FWSTATS_ADD(sub, name)                          \
  94         DEBUGFS_ADD(sub## _ ##name, stats)
  95
  96 static void wl1271_debugfs_update_stats(struct wl1271 *wl)
  97 {
  98         int ret;
  99
 100         mutex_lock(&wl->mutex);
 101
 102         ret = wl1271_ps_elp_wakeup(wl, false);
 103         if (ret < 0)
 104                 goto out;
 105
 106         if (wl->state == WL1271_STATE_ON &&
 107             time_after(jiffies, wl->stats.fw_stats_update +
 108                        msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
 109                 wl1271_acx_statistics(wl, wl->stats.fw_stats);
 110                 wl->stats.fw_stats_update = jiffies;
 111         }
 112
 113         wl1271_ps_elp_sleep(wl);
 114
 115 out:
 116         mutex_unlock(&wl->mutex);
 117 }
 118
 119 static int wl1271_open_file_generic(struct inode *inode, struct file *file)
 120 {
 121         file->private_data = inode->i_private;
 122         return 0;
 123 }
 124
 125 DEBUGFS_FWSTATS_FILE(tx, internal_desc_overflow, "%u");
 126
 127 DEBUGFS_FWSTATS_FILE(rx, out_of_mem, "%u");
 128 DEBUGFS_FWSTATS_FILE(rx, hdr_overflow, "%u");
 129 DEBUGFS_FWSTATS_FILE(rx, hw_stuck, "%u");
 130 DEBUGFS_FWSTATS_FILE(rx, dropped, "%u");
 131 DEBUGFS_FWSTATS_FILE(rx, fcs_err, "%u");
 132 DEBUGFS_FWSTATS_FILE(rx, xfr_hint_trig, "%u");
 133 DEBUGFS_FWSTATS_FILE(rx, path_reset, "%u");
 134 DEBUGFS_FWSTATS_FILE(rx, reset_counter, "%u");
 135
 136 DEBUGFS_FWSTATS_FILE(dma, rx_requested, "%u");
 137 DEBUGFS_FWSTATS_FILE(dma, rx_errors, "%u");
 138 DEBUGFS_FWSTATS_FILE(dma, tx_requested, "%u");
 139 DEBUGFS_FWSTATS_FILE(dma, tx_errors, "%u");
 140
 141 DEBUGFS_FWSTATS_FILE(isr, cmd_cmplt, "%u");
 142 DEBUGFS_FWSTATS_FILE(isr, fiqs, "%u");
 143 DEBUGFS_FWSTATS_FILE(isr, rx_headers, "%u");
 144 DEBUGFS_FWSTATS_FILE(isr, rx_mem_overflow, "%u");
 145 DEBUGFS_FWSTATS_FILE(isr, rx_rdys, "%u");
 146 DEBUGFS_FWSTATS_FILE(isr, irqs, "%u");
 147 DEBUGFS_FWSTATS_FILE(isr, tx_procs, "%u");
 148 DEBUGFS_FWSTATS_FILE(isr, decrypt_done, "%u");
 149 DEBUGFS_FWSTATS_FILE(isr, dma0_done, "%u");
 150 DEBUGFS_FWSTATS_FILE(isr, dma1_done, "%u");
 151 DEBUGFS_FWSTATS_FILE(isr, tx_exch_complete, "%u");
 152 DEBUGFS_FWSTATS_FILE(isr, commands, "%u");
 153 DEBUGFS_FWSTATS_FILE(isr, rx_procs, "%u");
 154 DEBUGFS_FWSTATS_FILE(isr, hw_pm_mode_changes, "%u");
 155 DEBUGFS_FWSTATS_FILE(isr, host_acknowledges, "%u");
 156 DEBUGFS_FWSTATS_FILE(isr, pci_pm, "%u");
 157 DEBUGFS_FWSTATS_FILE(isr, wakeups, "%u");
 158 DEBUGFS_FWSTATS_FILE(isr, low_rssi, "%u");
 159
 160 DEBUGFS_FWSTATS_FILE(wep, addr_key_count, "%u");
 161 DEBUGFS_FWSTATS_FILE(wep, default_key_count, "%u");
 162 /* skipping wep.reserved */
 163 DEBUGFS_FWSTATS_FILE(wep, key_not_found, "%u");
 164 DEBUGFS_FWSTATS_FILE(wep, decrypt_fail, "%u");
 165 DEBUGFS_FWSTATS_FILE(wep, packets, "%u");
 166 DEBUGFS_FWSTATS_FILE(wep, interrupt, "%u");
 167
 168 DEBUGFS_FWSTATS_FILE(pwr, ps_enter, "%u");
 169 DEBUGFS_FWSTATS_FILE(pwr, elp_enter, "%u");
 170 DEBUGFS_FWSTATS_FILE(pwr, missing_bcns, "%u");
 171 DEBUGFS_FWSTATS_FILE(pwr, wake_on_host, "%u");
 172 DEBUGFS_FWSTATS_FILE(pwr, wake_on_timer_exp, "%u");
 173 DEBUGFS_FWSTATS_FILE(pwr, tx_with_ps, "%u");
 174 DEBUGFS_FWSTATS_FILE(pwr, tx_without_ps, "%u");
 175 DEBUGFS_FWSTATS_FILE(pwr, rcvd_beacons, "%u");
 176 DEBUGFS_FWSTATS_FILE(pwr, power_save_off, "%u");
 177 DEBUGFS_FWSTATS_FILE(pwr, enable_ps, "%u");
 178 DEBUGFS_FWSTATS_FILE(pwr, disable_ps, "%u");
 179 DEBUGFS_FWSTATS_FILE(pwr, fix_tsf_ps, "%u");
 180 /* skipping cont_miss_bcns_spread for now */
 181 DEBUGFS_FWSTATS_FILE(pwr, rcvd_awake_beacons, "%u");
 182
 183 DEBUGFS_FWSTATS_FILE(mic, rx_pkts, "%u");
 184 DEBUGFS_FWSTATS_FILE(mic, calc_failure, "%u");
 185
 186 DEBUGFS_FWSTATS_FILE(aes, encrypt_fail, "%u");
 187 DEBUGFS_FWSTATS_FILE(aes, decrypt_fail, "%u");
 188 DEBUGFS_FWSTATS_FILE(aes, encrypt_packets, "%u");
 189 DEBUGFS_FWSTATS_FILE(aes, decrypt_packets, "%u");
 190 DEBUGFS_FWSTATS_FILE(aes, encrypt_interrupt, "%u");
 191 DEBUGFS_FWSTATS_FILE(aes, decrypt_interrupt, "%u");
 192
 193 DEBUGFS_FWSTATS_FILE(event, heart_beat, "%u");
 194 DEBUGFS_FWSTATS_FILE(event, calibration, "%u");
 195 DEBUGFS_FWSTATS_FILE(event, rx_mismatch, "%u");
 196 DEBUGFS_FWSTATS_FILE(event, rx_mem_empty, "%u");
 197 DEBUGFS_FWSTATS_FILE(event, rx_pool, "%u");
 198 DEBUGFS_FWSTATS_FILE(event, oom_late, "%u");
 199 DEBUGFS_FWSTATS_FILE(event, phy_transmit_error, "%u");
 200 DEBUGFS_FWSTATS_FILE(event, tx_stuck, "%u");
 201
 202 DEBUGFS_FWSTATS_FILE(ps, pspoll_timeouts, "%u");
 203 DEBUGFS_FWSTATS_FILE(ps, upsd_timeouts, "%u");
 204 DEBUGFS_FWSTATS_FILE(ps, upsd_max_sptime, "%u");
 205 DEBUGFS_FWSTATS_FILE(ps, upsd_max_apturn, "%u");
 206 DEBUGFS_FWSTATS_FILE(ps, pspoll_max_apturn, "%u");
 207 DEBUGFS_FWSTATS_FILE(ps, pspoll_utilization, "%u");
 208 DEBUGFS_FWSTATS_FILE(ps, upsd_utilization, "%u");
 209
 210 DEBUGFS_FWSTATS_FILE(rxpipe, rx_prep_beacon_drop, "%u");
 211 DEBUGFS_FWSTATS_FILE(rxpipe, descr_host_int_trig_rx_data, "%u");
 212 DEBUGFS_FWSTATS_FILE(rxpipe, beacon_buffer_thres_host_int_trig_rx_data, "%u");
 213 DEBUGFS_FWSTATS_FILE(rxpipe, missed_beacon_host_int_trig_rx_data, "%u");
 214 DEBUGFS_FWSTATS_FILE(rxpipe, tx_xfr_host_int_trig_rx_data, "%u");
 215
 216 DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
 217 DEBUGFS_READONLY_FILE(excessive_retries, "%u",
 218                       wl->stats.excessive_retries);
 219
 220 static ssize_t tx_queue_len_read(struct file *file, char __user *userbuf,
 221                                  size_t count, loff_t *ppos)
 222 {
 223         struct wl1271 *wl = file->private_data;
 224         u32 queue_len;
 225         char buf[20];
 226         int res;
 227
 228         queue_len = wl->tx_queue_count;
 229
 230         res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
 231         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 232 }
 233
 234 static const struct file_operations tx_queue_len_ops = {
 235         .read = tx_queue_len_read,
 236         .open = wl1271_open_file_generic,
 237         .llseek = default_llseek,
 238 };
 239
 240 static ssize_t gpio_power_read(struct file *file, char __user *user_buf,
 241                           size_t count, loff_t *ppos)
 242 {
 243         struct wl1271 *wl = file->private_data;
 244         bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
 245
 246         int res;
 247         char buf[10];
 248
 249         res = scnprintf(buf, sizeof(buf), "%d\n", state);
 250
 251         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 252 }
 253
 254 static ssize_t gpio_power_write(struct file *file,
 255                            const char __user *user_buf,
 256                            size_t count, loff_t *ppos)
 257 {
 258         struct wl1271 *wl = file->private_data;
 259         char buf[10];
 260         size_t len;
 261         unsigned long value;
 262         int ret;
 263
 264         mutex_lock(&wl->mutex);
 265
 266         len = min(count, sizeof(buf) - 1);
 267         if (copy_from_user(buf, user_buf, len)) {
 268                 ret = -EFAULT;
 269                 goto out;
 270         }
 271         buf[len] = '\0';
 272
 273         ret = strict_strtoul(buf, 0, &value);
 274         if (ret < 0) {
 275                 wl1271_warning("illegal value in gpio_power");
 276                 goto out;
 277         }
 278
 279         if (value)
 280                 wl1271_power_on(wl);
 281         else
 282                 wl1271_power_off(wl);
 283
 284 out:
 285         mutex_unlock(&wl->mutex);
 286         return count;
 287 }
 288
 289 static const struct file_operations gpio_power_ops = {
 290         .read = gpio_power_read,
 291         .write = gpio_power_write,
 292         .open = wl1271_open_file_generic,
 293         .llseek = default_llseek,
 294 };
 295
 296 static int wl1271_debugfs_add_files(struct wl1271 *wl)
 297 {
 298         int ret = 0;
 299         struct dentry *entry, *stats;
 300
 301         stats = debugfs_create_dir("fw-statistics", wl->rootdir);
 302         if (!stats || IS_ERR(stats)) {
 303                 entry = stats;
 304                 goto err;
 305         }
 306
 307         DEBUGFS_FWSTATS_ADD(tx, internal_desc_overflow);
 308
 309         DEBUGFS_FWSTATS_ADD(rx, out_of_mem);
 310         DEBUGFS_FWSTATS_ADD(rx, hdr_overflow);
 311         DEBUGFS_FWSTATS_ADD(rx, hw_stuck);
 312         DEBUGFS_FWSTATS_ADD(rx, dropped);
 313         DEBUGFS_FWSTATS_ADD(rx, fcs_err);
 314         DEBUGFS_FWSTATS_ADD(rx, xfr_hint_trig);
 315         DEBUGFS_FWSTATS_ADD(rx, path_reset);
 316         DEBUGFS_FWSTATS_ADD(rx, reset_counter);
 317
 318         DEBUGFS_FWSTATS_ADD(dma, rx_requested);
 319         DEBUGFS_FWSTATS_ADD(dma, rx_errors);
 320         DEBUGFS_FWSTATS_ADD(dma, tx_requested);
 321         DEBUGFS_FWSTATS_ADD(dma, tx_errors);
 322
 323         DEBUGFS_FWSTATS_ADD(isr, cmd_cmplt);
 324         DEBUGFS_FWSTATS_ADD(isr, fiqs);
 325         DEBUGFS_FWSTATS_ADD(isr, rx_headers);
 326         DEBUGFS_FWSTATS_ADD(isr, rx_mem_overflow);
 327         DEBUGFS_FWSTATS_ADD(isr, rx_rdys);
 328         DEBUGFS_FWSTATS_ADD(isr, irqs);
 329         DEBUGFS_FWSTATS_ADD(isr, tx_procs);
 330         DEBUGFS_FWSTATS_ADD(isr, decrypt_done);
 331         DEBUGFS_FWSTATS_ADD(isr, dma0_done);
 332         DEBUGFS_FWSTATS_ADD(isr, dma1_done);
 333         DEBUGFS_FWSTATS_ADD(isr, tx_exch_complete);
 334         DEBUGFS_FWSTATS_ADD(isr, commands);
 335         DEBUGFS_FWSTATS_ADD(isr, rx_procs);
 336         DEBUGFS_FWSTATS_ADD(isr, hw_pm_mode_changes);
 337         DEBUGFS_FWSTATS_ADD(isr, host_acknowledges);
 338         DEBUGFS_FWSTATS_ADD(isr, pci_pm);
 339         DEBUGFS_FWSTATS_ADD(isr, wakeups);
 340         DEBUGFS_FWSTATS_ADD(isr, low_rssi);
 341
 342         DEBUGFS_FWSTATS_ADD(wep, addr_key_count);
 343         DEBUGFS_FWSTATS_ADD(wep, default_key_count);
 344         /* skipping wep.reserved */
 345         DEBUGFS_FWSTATS_ADD(wep, key_not_found);
 346         DEBUGFS_FWSTATS_ADD(wep, decrypt_fail);
 347         DEBUGFS_FWSTATS_ADD(wep, packets);
 348         DEBUGFS_FWSTATS_ADD(wep, interrupt);
 349
 350         DEBUGFS_FWSTATS_ADD(pwr, ps_enter);
 351         DEBUGFS_FWSTATS_ADD(pwr, elp_enter);
 352         DEBUGFS_FWSTATS_ADD(pwr, missing_bcns);
 353         DEBUGFS_FWSTATS_ADD(pwr, wake_on_host);
 354         DEBUGFS_FWSTATS_ADD(pwr, wake_on_timer_exp);
 355         DEBUGFS_FWSTATS_ADD(pwr, tx_with_ps);
 356         DEBUGFS_FWSTATS_ADD(pwr, tx_without_ps);
 357         DEBUGFS_FWSTATS_ADD(pwr, rcvd_beacons);
 358         DEBUGFS_FWSTATS_ADD(pwr, power_save_off);
 359         DEBUGFS_FWSTATS_ADD(pwr, enable_ps);
 360         DEBUGFS_FWSTATS_ADD(pwr, disable_ps);
 361         DEBUGFS_FWSTATS_ADD(pwr, fix_tsf_ps);
 362         /* skipping cont_miss_bcns_spread for now */
 363         DEBUGFS_FWSTATS_ADD(pwr, rcvd_awake_beacons);
 364
 365         DEBUGFS_FWSTATS_ADD(mic, rx_pkts);
 366         DEBUGFS_FWSTATS_ADD(mic, calc_failure);
 367
 368         DEBUGFS_FWSTATS_ADD(aes, encrypt_fail);
 369         DEBUGFS_FWSTATS_ADD(aes, decrypt_fail);
 370         DEBUGFS_FWSTATS_ADD(aes, encrypt_packets);
 371         DEBUGFS_FWSTATS_ADD(aes, decrypt_packets);
 372         DEBUGFS_FWSTATS_ADD(aes, encrypt_interrupt);
 373         DEBUGFS_FWSTATS_ADD(aes, decrypt_interrupt);
 374
 375         DEBUGFS_FWSTATS_ADD(event, heart_beat);
 376         DEBUGFS_FWSTATS_ADD(event, calibration);
 377         DEBUGFS_FWSTATS_ADD(event, rx_mismatch);
 378         DEBUGFS_FWSTATS_ADD(event, rx_mem_empty);
 379         DEBUGFS_FWSTATS_ADD(event, rx_pool);
 380         DEBUGFS_FWSTATS_ADD(event, oom_late);
 381         DEBUGFS_FWSTATS_ADD(event, phy_transmit_error);
 382         DEBUGFS_FWSTATS_ADD(event, tx_stuck);
 383
 384         DEBUGFS_FWSTATS_ADD(ps, pspoll_timeouts);
 385         DEBUGFS_FWSTATS_ADD(ps, upsd_timeouts);
 386         DEBUGFS_FWSTATS_ADD(ps, upsd_max_sptime);
 387         DEBUGFS_FWSTATS_ADD(ps, upsd_max_apturn);
 388         DEBUGFS_FWSTATS_ADD(ps, pspoll_max_apturn);
 389         DEBUGFS_FWSTATS_ADD(ps, pspoll_utilization);
 390         DEBUGFS_FWSTATS_ADD(ps, upsd_utilization);
 391
 392         DEBUGFS_FWSTATS_ADD(rxpipe, rx_prep_beacon_drop);
 393         DEBUGFS_FWSTATS_ADD(rxpipe, descr_host_int_trig_rx_data);
 394         DEBUGFS_FWSTATS_ADD(rxpipe, beacon_buffer_thres_host_int_trig_rx_data);
 395         DEBUGFS_FWSTATS_ADD(rxpipe, missed_beacon_host_int_trig_rx_data);
 396         DEBUGFS_FWSTATS_ADD(rxpipe, tx_xfr_host_int_trig_rx_data);
 397
 398         DEBUGFS_ADD(tx_queue_len, wl->rootdir);
 399         DEBUGFS_ADD(retry_count, wl->rootdir);
 400         DEBUGFS_ADD(excessive_retries, wl->rootdir);
 401
 402         DEBUGFS_ADD(gpio_power, wl->rootdir);
 403
 404         entry = debugfs_create_x32("debug_level", 0600, wl->rootdir,
 405                                    &wl12xx_debug_level);
 406         if (!entry || IS_ERR(entry))
 407                 goto err;
 408
 409         return 0;
 410
 411 err:
 412         if (IS_ERR(entry))
 413                 ret = PTR_ERR(entry);
 414         else
 415                 ret = -ENOMEM;
 416
 417         return ret;
 418 }
 419
 420 void wl1271_debugfs_reset(struct wl1271 *wl)
 421 {
 422         if (!wl->rootdir)
 423                 return;
 424
 425         memset(wl->stats.fw_stats, 0, sizeof(*wl->stats.fw_stats));
 426         wl->stats.retry_count = 0;
 427         wl->stats.excessive_retries = 0;
 428 }
 429
 430 int wl1271_debugfs_init(struct wl1271 *wl)
 431 {
 432         int ret;
 433
 434         wl->rootdir = debugfs_create_dir(KBUILD_MODNAME,
 435                                          wl->hw->wiphy->debugfsdir);
 436
 437         if (IS_ERR(wl->rootdir)) {
 438                 ret = PTR_ERR(wl->rootdir);
 439                 wl->rootdir = NULL;
 440                 goto err;
 441         }
 442
 443         wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats),
 444                                       GFP_KERNEL);
 445
 446         if (!wl->stats.fw_stats) {
 447                 ret = -ENOMEM;
 448                 goto err_fw;
 449         }
 450
 451         wl->stats.fw_stats_update = jiffies;
 452
 453         ret = wl1271_debugfs_add_files(wl);
 454
 455         if (ret < 0)
 456                 goto err_file;
 457
 458         return 0;
 459
 460 err_file:
 461         kfree(wl->stats.fw_stats);
 462         wl->stats.fw_stats = NULL;
 463
 464 err_fw:
 465         debugfs_remove_recursive(wl->rootdir);
 466         wl->rootdir = NULL;
 467
 468 err:
 469         return ret;
 470 }
 471
 472 void wl1271_debugfs_exit(struct wl1271 *wl)
 473 {
 474         kfree(wl->stats.fw_stats);
 475         wl->stats.fw_stats = NULL;
 476
 477         debugfs_remove_recursive(wl->rootdir);
 478         wl->rootdir = NULL;
 479
 480 }