drivers/net/wireless/ath/ath6kl/debug.c

   1 /*
   2  * Copyright (c) 2004-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "core.h"
  18
  19 #include <linux/circ_buf.h>
  20 #include <linux/fs.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/export.h>
  23
  24 #include "debug.h"
  25 #include "target.h"
  26
  27 struct ath6kl_fwlog_slot {
  28         __le32 timestamp;
  29         __le32 length;
  30
  31         /* max ATH6KL_FWLOG_PAYLOAD_SIZE bytes */
  32         u8 payload[0];
  33 };
  34
  35 #define ATH6KL_FWLOG_SIZE 32768
  36 #define ATH6KL_FWLOG_SLOT_SIZE (sizeof(struct ath6kl_fwlog_slot) + \
  37                                 ATH6KL_FWLOG_PAYLOAD_SIZE)
  38 #define ATH6KL_FWLOG_VALID_MASK 0x1ffff
  39
  40 int ath6kl_printk(const char *level, const char *fmt, ...)
  41 {
  42         struct va_format vaf;
  43         va_list args;
  44         int rtn;
  45
  46         va_start(args, fmt);
  47
  48         vaf.fmt = fmt;
  49         vaf.va = &args;
  50
  51         rtn = printk("%sath6kl: %pV", level, &vaf);
  52
  53         va_end(args);
  54
  55         return rtn;
  56 }
  57
  58 #ifdef CONFIG_ATH6KL_DEBUG
  59
  60 #define REG_OUTPUT_LEN_PER_LINE 25
  61 #define REGTYPE_STR_LEN         100
  62
  63 struct ath6kl_diag_reg_info {
  64         u32 reg_start;
  65         u32 reg_end;
  66         const char *reg_info;
  67 };
  68
  69 static const struct ath6kl_diag_reg_info diag_reg[] = {
  70         { 0x20000, 0x200fc, "General DMA and Rx registers" },
  71         { 0x28000, 0x28900, "MAC PCU register & keycache" },
  72         { 0x20800, 0x20a40, "QCU" },
  73         { 0x21000, 0x212f0, "DCU" },
  74         { 0x4000,  0x42e4, "RTC" },
  75         { 0x540000, 0x540000 + (256 * 1024), "RAM" },
  76         { 0x29800, 0x2B210, "Base Band" },
  77         { 0x1C000, 0x1C748, "Analog" },
  78 };
  79
  80 void ath6kl_dump_registers(struct ath6kl_device *dev,
  81                            struct ath6kl_irq_proc_registers *irq_proc_reg,
  82                            struct ath6kl_irq_enable_reg *irq_enable_reg)
  83 {
  84
  85         ath6kl_dbg(ATH6KL_DBG_ANY, ("<------- Register Table -------->\n"));
  86
  87         if (irq_proc_reg != NULL) {
  88                 ath6kl_dbg(ATH6KL_DBG_ANY,
  89                         "Host Int status:           0x%x\n",
  90                         irq_proc_reg->host_int_status);
  91                 ath6kl_dbg(ATH6KL_DBG_ANY,
  92                            "CPU Int status:            0x%x\n",
  93                         irq_proc_reg->cpu_int_status);
  94                 ath6kl_dbg(ATH6KL_DBG_ANY,
  95                            "Error Int status:          0x%x\n",
  96                         irq_proc_reg->error_int_status);
  97                 ath6kl_dbg(ATH6KL_DBG_ANY,
  98                            "Counter Int status:        0x%x\n",
  99                         irq_proc_reg->counter_int_status);
 100                 ath6kl_dbg(ATH6KL_DBG_ANY,
 101                            "Mbox Frame:                0x%x\n",
 102                         irq_proc_reg->mbox_frame);
 103                 ath6kl_dbg(ATH6KL_DBG_ANY,
 104                            "Rx Lookahead Valid:        0x%x\n",
 105                         irq_proc_reg->rx_lkahd_valid);
 106                 ath6kl_dbg(ATH6KL_DBG_ANY,
 107                            "Rx Lookahead 0:            0x%x\n",
 108                         irq_proc_reg->rx_lkahd[0]);
 109                 ath6kl_dbg(ATH6KL_DBG_ANY,
 110                            "Rx Lookahead 1:            0x%x\n",
 111                         irq_proc_reg->rx_lkahd[1]);
 112
 113                 if (dev->ar->mbox_info.gmbox_addr != 0) {
 114                         /*
 115                          * If the target supports GMBOX hardware, dump some
 116                          * additional state.
 117                          */
 118                         ath6kl_dbg(ATH6KL_DBG_ANY,
 119                                 "GMBOX Host Int status 2:   0x%x\n",
 120                                 irq_proc_reg->host_int_status2);
 121                         ath6kl_dbg(ATH6KL_DBG_ANY,
 122                                 "GMBOX RX Avail:            0x%x\n",
 123                                 irq_proc_reg->gmbox_rx_avail);
 124                         ath6kl_dbg(ATH6KL_DBG_ANY,
 125                                 "GMBOX lookahead alias 0:   0x%x\n",
 126                                 irq_proc_reg->rx_gmbox_lkahd_alias[0]);
 127                         ath6kl_dbg(ATH6KL_DBG_ANY,
 128                                 "GMBOX lookahead alias 1:   0x%x\n",
 129                                 irq_proc_reg->rx_gmbox_lkahd_alias[1]);
 130                 }
 131
 132         }
 133
 134         if (irq_enable_reg != NULL) {
 135                 ath6kl_dbg(ATH6KL_DBG_ANY,
 136                         "Int status Enable:         0x%x\n",
 137                         irq_enable_reg->int_status_en);
 138                 ath6kl_dbg(ATH6KL_DBG_ANY, "Counter Int status Enable: 0x%x\n",
 139                         irq_enable_reg->cntr_int_status_en);
 140         }
 141         ath6kl_dbg(ATH6KL_DBG_ANY, "<------------------------------->\n");
 142 }
 143
 144 static void dump_cred_dist(struct htc_endpoint_credit_dist *ep_dist)
 145 {
 146         ath6kl_dbg(ATH6KL_DBG_ANY,
 147                    "--- endpoint: %d  svc_id: 0x%X ---\n",
 148                    ep_dist->endpoint, ep_dist->svc_id);
 149         ath6kl_dbg(ATH6KL_DBG_ANY, " dist_flags     : 0x%X\n",
 150                    ep_dist->dist_flags);
 151         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_norm      : %d\n",
 152                    ep_dist->cred_norm);
 153         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_min       : %d\n",
 154                    ep_dist->cred_min);
 155         ath6kl_dbg(ATH6KL_DBG_ANY, " credits        : %d\n",
 156                    ep_dist->credits);
 157         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_assngd    : %d\n",
 158                    ep_dist->cred_assngd);
 159         ath6kl_dbg(ATH6KL_DBG_ANY, " seek_cred      : %d\n",
 160                    ep_dist->seek_cred);
 161         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_sz        : %d\n",
 162                    ep_dist->cred_sz);
 163         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_per_msg   : %d\n",
 164                    ep_dist->cred_per_msg);
 165         ath6kl_dbg(ATH6KL_DBG_ANY, " cred_to_dist   : %d\n",
 166                    ep_dist->cred_to_dist);
 167         ath6kl_dbg(ATH6KL_DBG_ANY, " txq_depth      : %d\n",
 168                    get_queue_depth(&((struct htc_endpoint *)
 169                                      ep_dist->htc_rsvd)->txq));
 170         ath6kl_dbg(ATH6KL_DBG_ANY,
 171                    "----------------------------------\n");
 172 }
 173
 174 void dump_cred_dist_stats(struct htc_target *target)
 175 {
 176         struct htc_endpoint_credit_dist *ep_list;
 177
 178         if (!AR_DBG_LVL_CHECK(ATH6KL_DBG_TRC))
 179                 return;
 180
 181         list_for_each_entry(ep_list, &target->cred_dist_list, list)
 182                 dump_cred_dist(ep_list);
 183
 184         ath6kl_dbg(ATH6KL_DBG_HTC_SEND, "ctxt:%p dist:%p\n",
 185                    target->cred_dist_cntxt, NULL);
 186         ath6kl_dbg(ATH6KL_DBG_TRC, "credit distribution, total : %d, free : %d\n",
 187                    target->cred_dist_cntxt->total_avail_credits,
 188                    target->cred_dist_cntxt->cur_free_credits);
 189 }
 190
 191 static int ath6kl_debugfs_open(struct inode *inode, struct file *file)
 192 {
 193         file->private_data = inode->i_private;
 194         return 0;
 195 }
 196
 197 void ath6kl_debug_war(struct ath6kl *ar, enum ath6kl_war war)
 198 {
 199         switch (war) {
 200         case ATH6KL_WAR_INVALID_RATE:
 201                 ar->debug.war_stats.invalid_rate++;
 202                 break;
 203         }
 204 }
 205
 206 static ssize_t read_file_war_stats(struct file *file, char __user *user_buf,
 207                                    size_t count, loff_t *ppos)
 208 {
 209         struct ath6kl *ar = file->private_data;
 210         char *buf;
 211         unsigned int len = 0, buf_len = 1500;
 212         ssize_t ret_cnt;
 213
 214         buf = kzalloc(buf_len, GFP_KERNEL);
 215         if (!buf)
 216                 return -ENOMEM;
 217
 218         len += scnprintf(buf + len, buf_len - len, "\n");
 219         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 220                          "Workaround stats");
 221         len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
 222                          "=================");
 223         len += scnprintf(buf + len, buf_len - len, "%20s %10u\n",
 224                          "Invalid rates", ar->debug.war_stats.invalid_rate);
 225
 226         if (WARN_ON(len > buf_len))
 227                 len = buf_len;
 228
 229         ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 230
 231         kfree(buf);
 232         return ret_cnt;
 233 }
 234
 235 static const struct file_operations fops_war_stats = {
 236         .read = read_file_war_stats,
 237         .open = ath6kl_debugfs_open,
 238         .owner = THIS_MODULE,
 239         .llseek = default_llseek,
 240 };
 241
 242 static void ath6kl_debug_fwlog_add(struct ath6kl *ar, const void *buf,
 243                                    size_t buf_len)
 244 {
 245         struct circ_buf *fwlog = &ar->debug.fwlog_buf;
 246         size_t space;
 247         int i;
 248
 249         /* entries must all be equal size */
 250         if (WARN_ON(buf_len != ATH6KL_FWLOG_SLOT_SIZE))
 251                 return;
 252
 253         space = CIRC_SPACE(fwlog->head, fwlog->tail, ATH6KL_FWLOG_SIZE);
 254         if (space < buf_len)
 255                 /* discard oldest slot */
 256                 fwlog->tail = (fwlog->tail + ATH6KL_FWLOG_SLOT_SIZE) &
 257                         (ATH6KL_FWLOG_SIZE - 1);
 258
 259         for (i = 0; i < buf_len; i += space) {
 260                 space = CIRC_SPACE_TO_END(fwlog->head, fwlog->tail,
 261                                           ATH6KL_FWLOG_SIZE);
 262
 263                 if ((size_t) space > buf_len - i)
 264                         space = buf_len - i;
 265
 266                 memcpy(&fwlog->buf[fwlog->head], buf, space);
 267                 fwlog->head = (fwlog->head + space) & (ATH6KL_FWLOG_SIZE - 1);
 268         }
 269
 270 }
 271
 272 void ath6kl_debug_fwlog_event(struct ath6kl *ar, const void *buf, size_t len)
 273 {
 274         struct ath6kl_fwlog_slot *slot = ar->debug.fwlog_tmp;
 275         size_t slot_len;
 276
 277         if (WARN_ON(len > ATH6KL_FWLOG_PAYLOAD_SIZE))
 278                 return;
 279
 280         spin_lock_bh(&ar->debug.fwlog_lock);
 281
 282         slot->timestamp = cpu_to_le32(jiffies);
 283         slot->length = cpu_to_le32(len);
 284         memcpy(slot->payload, buf, len);
 285
 286         slot_len = sizeof(*slot) + len;
 287
 288         if (slot_len < ATH6KL_FWLOG_SLOT_SIZE)
 289                 memset(slot->payload + len, 0,
 290                        ATH6KL_FWLOG_SLOT_SIZE - slot_len);
 291
 292         ath6kl_debug_fwlog_add(ar, slot, ATH6KL_FWLOG_SLOT_SIZE);
 293
 294         spin_unlock_bh(&ar->debug.fwlog_lock);
 295 }
 296
 297 static bool ath6kl_debug_fwlog_empty(struct ath6kl *ar)
 298 {
 299         return CIRC_CNT(ar->debug.fwlog_buf.head,
 300                         ar->debug.fwlog_buf.tail,
 301                         ATH6KL_FWLOG_SLOT_SIZE) == 0;
 302 }
 303
 304 static ssize_t ath6kl_fwlog_read(struct file *file, char __user *user_buf,
 305                                  size_t count, loff_t *ppos)
 306 {
 307         struct ath6kl *ar = file->private_data;
 308         struct circ_buf *fwlog = &ar->debug.fwlog_buf;
 309         size_t len = 0, buf_len = count;
 310         ssize_t ret_cnt;
 311         char *buf;
 312         int ccnt;
 313
 314         buf = vmalloc(buf_len);
 315         if (!buf)
 316                 return -ENOMEM;
 317
 318         /* read undelivered logs from firmware */
 319         ath6kl_read_fwlogs(ar);
 320
 321         spin_lock_bh(&ar->debug.fwlog_lock);
 322
 323         while (len < buf_len && !ath6kl_debug_fwlog_empty(ar)) {
 324                 ccnt = CIRC_CNT_TO_END(fwlog->head, fwlog->tail,
 325                                        ATH6KL_FWLOG_SIZE);
 326
 327                 if ((size_t) ccnt > buf_len - len)
 328                         ccnt = buf_len - len;
 329
 330                 memcpy(buf + len, &fwlog->buf[fwlog->tail], ccnt);
 331                 len += ccnt;
 332
 333                 fwlog->tail = (fwlog->tail + ccnt) &
 334                         (ATH6KL_FWLOG_SIZE - 1);
 335         }
 336
 337         spin_unlock_bh(&ar->debug.fwlog_lock);
 338
 339         if (WARN_ON(len > buf_len))
 340                 len = buf_len;
 341
 342         ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 343
 344         vfree(buf);
 345
 346         return ret_cnt;
 347 }
 348
 349 static const struct file_operations fops_fwlog = {
 350         .open = ath6kl_debugfs_open,
 351         .read = ath6kl_fwlog_read,
 352         .owner = THIS_MODULE,
 353         .llseek = default_llseek,
 354 };
 355
 356 static ssize_t ath6kl_fwlog_mask_read(struct file *file, char __user *user_buf,
 357                                       size_t count, loff_t *ppos)
 358 {
 359         struct ath6kl *ar = file->private_data;
 360         char buf[16];
 361         int len;
 362
 363         len = snprintf(buf, sizeof(buf), "0x%x\n", ar->debug.fwlog_mask);
 364
 365         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 366 }
 367
 368 static ssize_t ath6kl_fwlog_mask_write(struct file *file,
 369                                        const char __user *user_buf,
 370                                        size_t count, loff_t *ppos)
 371 {
 372         struct ath6kl *ar = file->private_data;
 373         int ret;
 374
 375         ret = kstrtou32_from_user(user_buf, count, 0, &ar->debug.fwlog_mask);
 376         if (ret)
 377                 return ret;
 378
 379         ret = ath6kl_wmi_config_debug_module_cmd(ar->wmi,
 380                                                  ATH6KL_FWLOG_VALID_MASK,
 381                                                  ar->debug.fwlog_mask);
 382         if (ret)
 383                 return ret;
 384
 385         return count;
 386 }
 387
 388 static const struct file_operations fops_fwlog_mask = {
 389         .open = ath6kl_debugfs_open,
 390         .read = ath6kl_fwlog_mask_read,
 391         .write = ath6kl_fwlog_mask_write,
 392         .owner = THIS_MODULE,
 393         .llseek = default_llseek,
 394 };
 395
 396 static ssize_t read_file_tgt_stats(struct file *file, char __user *user_buf,
 397                                    size_t count, loff_t *ppos)
 398 {
 399         struct ath6kl *ar = file->private_data;
 400         struct target_stats *tgt_stats = &ar->target_stats;
 401         char *buf;
 402         unsigned int len = 0, buf_len = 1500;
 403         int i;
 404         long left;
 405         ssize_t ret_cnt;
 406
 407         buf = kzalloc(buf_len, GFP_KERNEL);
 408         if (!buf)
 409                 return -ENOMEM;
 410
 411         if (down_interruptible(&ar->sem)) {
 412                 kfree(buf);
 413                 return -EBUSY;
 414         }
 415
 416         set_bit(STATS_UPDATE_PEND, &ar->flag);
 417
 418         if (ath6kl_wmi_get_stats_cmd(ar->wmi)) {
 419                 up(&ar->sem);
 420                 kfree(buf);
 421                 return -EIO;
 422         }
 423
 424         left = wait_event_interruptible_timeout(ar->event_wq,
 425                                                 !test_bit(STATS_UPDATE_PEND,
 426                                                 &ar->flag), WMI_TIMEOUT);
 427
 428         up(&ar->sem);
 429
 430         if (left <= 0) {
 431                 kfree(buf);
 432                 return -ETIMEDOUT;
 433         }
 434
 435         len += scnprintf(buf + len, buf_len - len, "\n");
 436         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 437                          "Target Tx stats");
 438         len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
 439                          "=================");
 440         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 441                          "Ucast packets", tgt_stats->tx_ucast_pkt);
 442         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 443                          "Bcast packets", tgt_stats->tx_bcast_pkt);
 444         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 445                          "Ucast byte", tgt_stats->tx_ucast_byte);
 446         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 447                          "Bcast byte", tgt_stats->tx_bcast_byte);
 448         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 449                          "Rts success cnt", tgt_stats->tx_rts_success_cnt);
 450         for (i = 0; i < 4; i++)
 451                 len += scnprintf(buf + len, buf_len - len,
 452                                  "%18s %d %10llu\n", "PER on ac",
 453                                  i, tgt_stats->tx_pkt_per_ac[i]);
 454         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 455                          "Error", tgt_stats->tx_err);
 456         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 457                          "Fail count", tgt_stats->tx_fail_cnt);
 458         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 459                          "Retry count", tgt_stats->tx_retry_cnt);
 460         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 461                          "Multi retry cnt", tgt_stats->tx_mult_retry_cnt);
 462         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 463                          "Rts fail cnt", tgt_stats->tx_rts_fail_cnt);
 464         len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n\n",
 465                          "TKIP counter measure used",
 466                          tgt_stats->tkip_cnter_measures_invoked);
 467
 468         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 469                          "Target Rx stats");
 470         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 471                          "=================");
 472
 473         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 474                          "Ucast packets", tgt_stats->rx_ucast_pkt);
 475         len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
 476                          "Ucast Rate", tgt_stats->rx_ucast_rate);
 477         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 478                          "Bcast packets", tgt_stats->rx_bcast_pkt);
 479         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 480                          "Ucast byte", tgt_stats->rx_ucast_byte);
 481         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 482                          "Bcast byte", tgt_stats->rx_bcast_byte);
 483         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 484                          "Fragmented pkt", tgt_stats->rx_frgment_pkt);
 485         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 486                          "Error", tgt_stats->rx_err);
 487         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 488                          "CRC Err", tgt_stats->rx_crc_err);
 489         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 490                          "Key chache miss", tgt_stats->rx_key_cache_miss);
 491         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 492                          "Decrypt Err", tgt_stats->rx_decrypt_err);
 493         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 494                          "Duplicate frame", tgt_stats->rx_dupl_frame);
 495         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 496                          "Tkip Mic failure", tgt_stats->tkip_local_mic_fail);
 497         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 498                          "TKIP format err", tgt_stats->tkip_fmt_err);
 499         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 500                          "CCMP format Err", tgt_stats->ccmp_fmt_err);
 501         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n\n",
 502                          "CCMP Replay Err", tgt_stats->ccmp_replays);
 503
 504         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 505                          "Misc Target stats");
 506         len += scnprintf(buf + len, buf_len - len, "%25s\n",
 507                          "=================");
 508         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 509                          "Beacon Miss count", tgt_stats->cs_bmiss_cnt);
 510         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 511                          "Num Connects", tgt_stats->cs_connect_cnt);
 512         len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
 513                          "Num disconnects", tgt_stats->cs_discon_cnt);
 514         len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
 515                          "Beacon avg rssi", tgt_stats->cs_ave_beacon_rssi);
 516
 517         if (len > buf_len)
 518                 len = buf_len;
 519
 520         ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 521
 522         kfree(buf);
 523         return ret_cnt;
 524 }
 525
 526 static const struct file_operations fops_tgt_stats = {
 527         .read = read_file_tgt_stats,
 528         .open = ath6kl_debugfs_open,
 529         .owner = THIS_MODULE,
 530         .llseek = default_llseek,
 531 };
 532
 533 #define print_credit_info(fmt_str, ep_list_field)               \
 534         (len += scnprintf(buf + len, buf_len - len, fmt_str,    \
 535                          ep_list->ep_list_field))
 536 #define CREDIT_INFO_DISPLAY_STRING_LEN  200
 537 #define CREDIT_INFO_LEN 128
 538
 539 static ssize_t read_file_credit_dist_stats(struct file *file,
 540                                            char __user *user_buf,
 541                                            size_t count, loff_t *ppos)
 542 {
 543         struct ath6kl *ar = file->private_data;
 544         struct htc_target *target = ar->htc_target;
 545         struct htc_endpoint_credit_dist *ep_list;
 546         char *buf;
 547         unsigned int buf_len, len = 0;
 548         ssize_t ret_cnt;
 549
 550         buf_len = CREDIT_INFO_DISPLAY_STRING_LEN +
 551                   get_queue_depth(&target->cred_dist_list) * CREDIT_INFO_LEN;
 552         buf = kzalloc(buf_len, GFP_KERNEL);
 553         if (!buf)
 554                 return -ENOMEM;
 555
 556         len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
 557                          "Total Avail Credits: ",
 558                          target->cred_dist_cntxt->total_avail_credits);
 559         len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
 560                          "Free credits :",
 561                          target->cred_dist_cntxt->cur_free_credits);
 562
 563         len += scnprintf(buf + len, buf_len - len,
 564                          " Epid  Flags    Cred_norm  Cred_min  Credits  Cred_assngd"
 565                          "  Seek_cred  Cred_sz  Cred_per_msg  Cred_to_dist"
 566                          "  qdepth\n");
 567
 568         list_for_each_entry(ep_list, &target->cred_dist_list, list) {
 569                 print_credit_info("  %2d", endpoint);
 570                 print_credit_info("%10x", dist_flags);
 571                 print_credit_info("%8d", cred_norm);
 572                 print_credit_info("%9d", cred_min);
 573                 print_credit_info("%9d", credits);
 574                 print_credit_info("%10d", cred_assngd);
 575                 print_credit_info("%13d", seek_cred);
 576                 print_credit_info("%12d", cred_sz);
 577                 print_credit_info("%9d", cred_per_msg);
 578                 print_credit_info("%14d", cred_to_dist);
 579                 len += scnprintf(buf + len, buf_len - len, "%12d\n",
 580                                  get_queue_depth(&((struct htc_endpoint *)
 581                                                  ep_list->htc_rsvd)->txq));
 582         }
 583
 584         if (len > buf_len)
 585                 len = buf_len;
 586
 587         ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 588         kfree(buf);
 589         return ret_cnt;
 590 }
 591
 592 static const struct file_operations fops_credit_dist_stats = {
 593         .read = read_file_credit_dist_stats,
 594         .open = ath6kl_debugfs_open,
 595         .owner = THIS_MODULE,
 596         .llseek = default_llseek,
 597 };
 598
 599 static unsigned long ath6kl_get_num_reg(void)
 600 {
 601         int i;
 602         unsigned long n_reg = 0;
 603
 604         for (i = 0; i < ARRAY_SIZE(diag_reg); i++)
 605                 n_reg = n_reg +
 606                      (diag_reg[i].reg_end - diag_reg[i].reg_start) / 4 + 1;
 607
 608         return n_reg;
 609 }
 610
 611 static bool ath6kl_dbg_is_diag_reg_valid(u32 reg_addr)
 612 {
 613         int i;
 614
 615         for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
 616                 if (reg_addr >= diag_reg[i].reg_start &&
 617                     reg_addr <= diag_reg[i].reg_end)
 618                         return true;
 619         }
 620
 621         return false;
 622 }
 623
 624 static ssize_t ath6kl_regread_read(struct file *file, char __user *user_buf,
 625                                     size_t count, loff_t *ppos)
 626 {
 627         struct ath6kl *ar = file->private_data;
 628         u8 buf[50];
 629         unsigned int len = 0;
 630
 631         if (ar->debug.dbgfs_diag_reg)
 632                 len += scnprintf(buf + len, sizeof(buf) - len, "0x%x\n",
 633                                 ar->debug.dbgfs_diag_reg);
 634         else
 635                 len += scnprintf(buf + len, sizeof(buf) - len,
 636                                  "All diag registers\n");
 637
 638         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 639 }
 640
 641 static ssize_t ath6kl_regread_write(struct file *file,
 642                                     const char __user *user_buf,
 643                                     size_t count, loff_t *ppos)
 644 {
 645         struct ath6kl *ar = file->private_data;
 646         u8 buf[50];
 647         unsigned int len;
 648         unsigned long reg_addr;
 649
 650         len = min(count, sizeof(buf) - 1);
 651         if (copy_from_user(buf, user_buf, len))
 652                 return -EFAULT;
 653
 654         buf[len] = '\0';
 655
 656         if (strict_strtoul(buf, 0, &reg_addr))
 657                 return -EINVAL;
 658
 659         if ((reg_addr % 4) != 0)
 660                 return -EINVAL;
 661
 662         if (reg_addr && !ath6kl_dbg_is_diag_reg_valid(reg_addr))
 663                 return -EINVAL;
 664
 665         ar->debug.dbgfs_diag_reg = reg_addr;
 666
 667         return count;
 668 }
 669
 670 static const struct file_operations fops_diag_reg_read = {
 671         .read = ath6kl_regread_read,
 672         .write = ath6kl_regread_write,
 673         .open = ath6kl_debugfs_open,
 674         .owner = THIS_MODULE,
 675         .llseek = default_llseek,
 676 };
 677
 678 static int ath6kl_regdump_open(struct inode *inode, struct file *file)
 679 {
 680         struct ath6kl *ar = inode->i_private;
 681         u8 *buf;
 682         unsigned long int reg_len;
 683         unsigned int len = 0, n_reg;
 684         u32 addr;
 685         __le32 reg_val;
 686         int i, status;
 687
 688         /* Dump all the registers if no register is specified */
 689         if (!ar->debug.dbgfs_diag_reg)
 690                 n_reg = ath6kl_get_num_reg();
 691         else
 692                 n_reg = 1;
 693
 694         reg_len = n_reg * REG_OUTPUT_LEN_PER_LINE;
 695         if (n_reg > 1)
 696                 reg_len += REGTYPE_STR_LEN;
 697
 698         buf = vmalloc(reg_len);
 699         if (!buf)
 700                 return -ENOMEM;
 701
 702         if (n_reg == 1) {
 703                 addr = ar->debug.dbgfs_diag_reg;
 704
 705                 status = ath6kl_diag_read32(ar,
 706                                 TARG_VTOP(ar->target_type, addr),
 707                                 (u32 *)&reg_val);
 708                 if (status)
 709                         goto fail_reg_read;
 710
 711                 len += scnprintf(buf + len, reg_len - len,
 712                                  "0x%06x 0x%08x\n", addr, le32_to_cpu(reg_val));
 713                 goto done;
 714         }
 715
 716         for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
 717                 len += scnprintf(buf + len, reg_len - len,
 718                                 "%s\n", diag_reg[i].reg_info);
 719                 for (addr = diag_reg[i].reg_start;
 720                      addr <= diag_reg[i].reg_end; addr += 4) {
 721                         status = ath6kl_diag_read32(ar,
 722                                         TARG_VTOP(ar->target_type, addr),
 723                                         (u32 *)&reg_val);
 724                         if (status)
 725                                 goto fail_reg_read;
 726
 727                         len += scnprintf(buf + len, reg_len - len,
 728                                         "0x%06x 0x%08x\n",
 729                                         addr, le32_to_cpu(reg_val));
 730                 }
 731         }
 732
 733 done:
 734         file->private_data = buf;
 735         return 0;
 736
 737 fail_reg_read:
 738         ath6kl_warn("Unable to read memory:%u\n", addr);
 739         vfree(buf);
 740         return -EIO;
 741 }
 742
 743 static ssize_t ath6kl_regdump_read(struct file *file, char __user *user_buf,
 744                                   size_t count, loff_t *ppos)
 745 {
 746         u8 *buf = file->private_data;
 747         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 748 }
 749
 750 static int ath6kl_regdump_release(struct inode *inode, struct file *file)
 751 {
 752         vfree(file->private_data);
 753         return 0;
 754 }
 755
 756 static const struct file_operations fops_reg_dump = {
 757         .open = ath6kl_regdump_open,
 758         .read = ath6kl_regdump_read,
 759         .release = ath6kl_regdump_release,
 760         .owner = THIS_MODULE,
 761         .llseek = default_llseek,
 762 };
 763
 764 static ssize_t ath6kl_lrssi_roam_write(struct file *file,
 765                                        const char __user *user_buf,
 766                                        size_t count, loff_t *ppos)
 767 {
 768         struct ath6kl *ar = file->private_data;
 769         unsigned long lrssi_roam_threshold;
 770         char buf[32];
 771         ssize_t len;
 772
 773         len = min(count, sizeof(buf) - 1);
 774         if (copy_from_user(buf, user_buf, len))
 775                 return -EFAULT;
 776
 777         buf[len] = '\0';
 778         if (strict_strtoul(buf, 0, &lrssi_roam_threshold))
 779                 return -EINVAL;
 780
 781         ar->lrssi_roam_threshold = lrssi_roam_threshold;
 782
 783         ath6kl_wmi_set_roam_lrssi_cmd(ar->wmi, ar->lrssi_roam_threshold);
 784
 785         return count;
 786 }
 787
 788 static ssize_t ath6kl_lrssi_roam_read(struct file *file,
 789                                       char __user *user_buf,
 790                                       size_t count, loff_t *ppos)
 791 {
 792         struct ath6kl *ar = file->private_data;
 793         char buf[32];
 794         unsigned int len;
 795
 796         len = snprintf(buf, sizeof(buf), "%u\n", ar->lrssi_roam_threshold);
 797
 798         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 799 }
 800
 801 static const struct file_operations fops_lrssi_roam_threshold = {
 802         .read = ath6kl_lrssi_roam_read,
 803         .write = ath6kl_lrssi_roam_write,
 804         .open = ath6kl_debugfs_open,
 805         .owner = THIS_MODULE,
 806         .llseek = default_llseek,
 807 };
 808
 809 static ssize_t ath6kl_regwrite_read(struct file *file,
 810                                     char __user *user_buf,
 811                                     size_t count, loff_t *ppos)
 812 {
 813         struct ath6kl *ar = file->private_data;
 814         u8 buf[32];
 815         unsigned int len = 0;
 816
 817         len = scnprintf(buf, sizeof(buf), "Addr: 0x%x Val: 0x%x\n",
 818                         ar->debug.diag_reg_addr_wr, ar->debug.diag_reg_val_wr);
 819
 820         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 821 }
 822
 823 static ssize_t ath6kl_regwrite_write(struct file *file,
 824                                      const char __user *user_buf,
 825                                      size_t count, loff_t *ppos)
 826 {
 827         struct ath6kl *ar = file->private_data;
 828         char buf[32];
 829         char *sptr, *token;
 830         unsigned int len = 0;
 831         u32 reg_addr, reg_val;
 832
 833         len = min(count, sizeof(buf) - 1);
 834         if (copy_from_user(buf, user_buf, len))
 835                 return -EFAULT;
 836
 837         buf[len] = '\0';
 838         sptr = buf;
 839
 840         token = strsep(&sptr, "=");
 841         if (!token)
 842                 return -EINVAL;
 843
 844         if (kstrtou32(token, 0, &reg_addr))
 845                 return -EINVAL;
 846
 847         if (!ath6kl_dbg_is_diag_reg_valid(reg_addr))
 848                 return -EINVAL;
 849
 850         if (kstrtou32(sptr, 0, &reg_val))
 851                 return -EINVAL;
 852
 853         ar->debug.diag_reg_addr_wr = reg_addr;
 854         ar->debug.diag_reg_val_wr = reg_val;
 855
 856         if (ath6kl_diag_write32(ar, ar->debug.diag_reg_addr_wr,
 857                                 cpu_to_le32(ar->debug.diag_reg_val_wr)))
 858                 return -EIO;
 859
 860         return count;
 861 }
 862
 863 static const struct file_operations fops_diag_reg_write = {
 864         .read = ath6kl_regwrite_read,
 865         .write = ath6kl_regwrite_write,
 866         .open = ath6kl_debugfs_open,
 867         .owner = THIS_MODULE,
 868         .llseek = default_llseek,
 869 };
 870
 871 int ath6kl_debug_init(struct ath6kl *ar)
 872 {
 873         ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE);
 874         if (ar->debug.fwlog_buf.buf == NULL)
 875                 return -ENOMEM;
 876
 877         ar->debug.fwlog_tmp = kmalloc(ATH6KL_FWLOG_SLOT_SIZE, GFP_KERNEL);
 878         if (ar->debug.fwlog_tmp == NULL) {
 879                 vfree(ar->debug.fwlog_buf.buf);
 880                 return -ENOMEM;
 881         }
 882
 883         spin_lock_init(&ar->debug.fwlog_lock);
 884
 885         /*
 886          * Actually we are lying here but don't know how to read the mask
 887          * value from the firmware.
 888          */
 889         ar->debug.fwlog_mask = 0;
 890
 891         ar->debugfs_phy = debugfs_create_dir("ath6kl",
 892                                              ar->wdev->wiphy->debugfsdir);
 893         if (!ar->debugfs_phy) {
 894                 vfree(ar->debug.fwlog_buf.buf);
 895                 kfree(ar->debug.fwlog_tmp);
 896                 return -ENOMEM;
 897         }
 898
 899         debugfs_create_file("tgt_stats", S_IRUSR, ar->debugfs_phy, ar,
 900                             &fops_tgt_stats);
 901
 902         debugfs_create_file("credit_dist_stats", S_IRUSR, ar->debugfs_phy, ar,
 903                             &fops_credit_dist_stats);
 904
 905         debugfs_create_file("fwlog", S_IRUSR, ar->debugfs_phy, ar,
 906                             &fops_fwlog);
 907
 908         debugfs_create_file("fwlog_mask", S_IRUSR | S_IWUSR, ar->debugfs_phy,
 909                             ar, &fops_fwlog_mask);
 910
 911         debugfs_create_file("reg_addr", S_IRUSR | S_IWUSR, ar->debugfs_phy, ar,
 912                             &fops_diag_reg_read);
 913
 914         debugfs_create_file("reg_dump", S_IRUSR, ar->debugfs_phy, ar,
 915                             &fops_reg_dump);
 916
 917         debugfs_create_file("lrssi_roam_threshold", S_IRUSR | S_IWUSR,
 918                             ar->debugfs_phy, ar, &fops_lrssi_roam_threshold);
 919
 920         debugfs_create_file("reg_write", S_IRUSR | S_IWUSR,
 921                             ar->debugfs_phy, ar, &fops_diag_reg_write);
 922
 923         debugfs_create_file("war_stats", S_IRUSR, ar->debugfs_phy, ar,
 924                             &fops_war_stats);
 925
 926         return 0;
 927 }
 928
 929 void ath6kl_debug_cleanup(struct ath6kl *ar)
 930 {
 931         vfree(ar->debug.fwlog_buf.buf);
 932         kfree(ar->debug.fwlog_tmp);
 933 }
 934
 935 #endif