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