drivers/net/wireless/mwifiex/debugfs.c

   1 /*
   2  * Marvell Wireless LAN device driver: debugfs
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include <linux/debugfs.h>
  21
  22 #include "main.h"
  23 #include "11n.h"
  24
  25
  26 static struct dentry *mwifiex_dfs_dir;
  27
  28 static char *bss_modes[] = {
  29         "UNSPECIFIED",
  30         "ADHOC",
  31         "STATION",
  32         "AP",
  33         "AP_VLAN",
  34         "WDS",
  35         "MONITOR",
  36         "MESH_POINT",
  37         "P2P_CLIENT",
  38         "P2P_GO",
  39         "P2P_DEVICE",
  40 };
  41
  42 /* size/addr for mwifiex_debug_info */
  43 #define item_size(n)            (FIELD_SIZEOF(struct mwifiex_debug_info, n))
  44 #define item_addr(n)            (offsetof(struct mwifiex_debug_info, n))
  45
  46 /* size/addr for struct mwifiex_adapter */
  47 #define adapter_item_size(n)    (FIELD_SIZEOF(struct mwifiex_adapter, n))
  48 #define adapter_item_addr(n)    (offsetof(struct mwifiex_adapter, n))
  49
  50 struct mwifiex_debug_data {
  51         char name[32];          /* variable/array name */
  52         u32 size;               /* size of the variable/array */
  53         size_t addr;            /* address of the variable/array */
  54         int num;                /* number of variables in an array */
  55 };
  56
  57 static struct mwifiex_debug_data items[] = {
  58         {"int_counter", item_size(int_counter),
  59          item_addr(int_counter), 1},
  60         {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
  61          item_addr(packets_out[WMM_AC_VO]), 1},
  62         {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
  63          item_addr(packets_out[WMM_AC_VI]), 1},
  64         {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
  65          item_addr(packets_out[WMM_AC_BE]), 1},
  66         {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
  67          item_addr(packets_out[WMM_AC_BK]), 1},
  68         {"tx_buf_size", item_size(tx_buf_size),
  69          item_addr(tx_buf_size), 1},
  70         {"curr_tx_buf_size", item_size(curr_tx_buf_size),
  71          item_addr(curr_tx_buf_size), 1},
  72         {"ps_mode", item_size(ps_mode),
  73          item_addr(ps_mode), 1},
  74         {"ps_state", item_size(ps_state),
  75          item_addr(ps_state), 1},
  76         {"is_deep_sleep", item_size(is_deep_sleep),
  77          item_addr(is_deep_sleep), 1},
  78         {"wakeup_dev_req", item_size(pm_wakeup_card_req),
  79          item_addr(pm_wakeup_card_req), 1},
  80         {"wakeup_tries", item_size(pm_wakeup_fw_try),
  81          item_addr(pm_wakeup_fw_try), 1},
  82         {"hs_configured", item_size(is_hs_configured),
  83          item_addr(is_hs_configured), 1},
  84         {"hs_activated", item_size(hs_activated),
  85          item_addr(hs_activated), 1},
  86         {"num_tx_timeout", item_size(num_tx_timeout),
  87          item_addr(num_tx_timeout), 1},
  88         {"num_cmd_timeout", item_size(num_cmd_timeout),
  89          item_addr(num_cmd_timeout), 1},
  90         {"timeout_cmd_id", item_size(timeout_cmd_id),
  91          item_addr(timeout_cmd_id), 1},
  92         {"timeout_cmd_act", item_size(timeout_cmd_act),
  93          item_addr(timeout_cmd_act), 1},
  94         {"last_cmd_id", item_size(last_cmd_id),
  95          item_addr(last_cmd_id), DBG_CMD_NUM},
  96         {"last_cmd_act", item_size(last_cmd_act),
  97          item_addr(last_cmd_act), DBG_CMD_NUM},
  98         {"last_cmd_index", item_size(last_cmd_index),
  99          item_addr(last_cmd_index), 1},
 100         {"last_cmd_resp_id", item_size(last_cmd_resp_id),
 101          item_addr(last_cmd_resp_id), DBG_CMD_NUM},
 102         {"last_cmd_resp_index", item_size(last_cmd_resp_index),
 103          item_addr(last_cmd_resp_index), 1},
 104         {"last_event", item_size(last_event),
 105          item_addr(last_event), DBG_CMD_NUM},
 106         {"last_event_index", item_size(last_event_index),
 107          item_addr(last_event_index), 1},
 108         {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
 109          item_addr(num_cmd_host_to_card_failure), 1},
 110         {"num_cmd_sleep_cfm_fail",
 111          item_size(num_cmd_sleep_cfm_host_to_card_failure),
 112          item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
 113         {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
 114          item_addr(num_tx_host_to_card_failure), 1},
 115         {"num_evt_deauth", item_size(num_event_deauth),
 116          item_addr(num_event_deauth), 1},
 117         {"num_evt_disassoc", item_size(num_event_disassoc),
 118          item_addr(num_event_disassoc), 1},
 119         {"num_evt_link_lost", item_size(num_event_link_lost),
 120          item_addr(num_event_link_lost), 1},
 121         {"num_cmd_deauth", item_size(num_cmd_deauth),
 122          item_addr(num_cmd_deauth), 1},
 123         {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
 124          item_addr(num_cmd_assoc_success), 1},
 125         {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
 126          item_addr(num_cmd_assoc_failure), 1},
 127         {"cmd_sent", item_size(cmd_sent),
 128          item_addr(cmd_sent), 1},
 129         {"data_sent", item_size(data_sent),
 130          item_addr(data_sent), 1},
 131         {"cmd_resp_received", item_size(cmd_resp_received),
 132          item_addr(cmd_resp_received), 1},
 133         {"event_received", item_size(event_received),
 134          item_addr(event_received), 1},
 135
 136         /* variables defined in struct mwifiex_adapter */
 137         {"cmd_pending", adapter_item_size(cmd_pending),
 138          adapter_item_addr(cmd_pending), 1},
 139         {"tx_pending", adapter_item_size(tx_pending),
 140          adapter_item_addr(tx_pending), 1},
 141         {"rx_pending", adapter_item_size(rx_pending),
 142          adapter_item_addr(rx_pending), 1},
 143 };
 144
 145 static int num_of_items = ARRAY_SIZE(items);
 146
 147 /*
 148  * Proc info file read handler.
 149  *
 150  * This function is called when the 'info' file is opened for reading.
 151  * It prints the following driver related information -
 152  *      - Driver name
 153  *      - Driver version
 154  *      - Driver extended version
 155  *      - Interface name
 156  *      - BSS mode
 157  *      - Media state (connected or disconnected)
 158  *      - MAC address
 159  *      - Total number of Tx bytes
 160  *      - Total number of Rx bytes
 161  *      - Total number of Tx packets
 162  *      - Total number of Rx packets
 163  *      - Total number of dropped Tx packets
 164  *      - Total number of dropped Rx packets
 165  *      - Total number of corrupted Tx packets
 166  *      - Total number of corrupted Rx packets
 167  *      - Carrier status (on or off)
 168  *      - Tx queue status (started or stopped)
 169  *
 170  * For STA mode drivers, it also prints the following extra -
 171  *      - ESSID
 172  *      - BSSID
 173  *      - Channel
 174  *      - Region code
 175  *      - Multicast count
 176  *      - Multicast addresses
 177  */
 178 static ssize_t
 179 mwifiex_info_read(struct file *file, char __user *ubuf,
 180                   size_t count, loff_t *ppos)
 181 {
 182         struct mwifiex_private *priv =
 183                 (struct mwifiex_private *) file->private_data;
 184         struct net_device *netdev = priv->netdev;
 185         struct netdev_hw_addr *ha;
 186         struct netdev_queue *txq;
 187         unsigned long page = get_zeroed_page(GFP_KERNEL);
 188         char *p = (char *) page, fmt[64];
 189         struct mwifiex_bss_info info;
 190         ssize_t ret;
 191         int i = 0;
 192
 193         if (!p)
 194                 return -ENOMEM;
 195
 196         memset(&info, 0, sizeof(info));
 197         ret = mwifiex_get_bss_info(priv, &info);
 198         if (ret)
 199                 goto free_and_exit;
 200
 201         mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);
 202
 203         if (!priv->version_str[0])
 204                 mwifiex_get_ver_ext(priv);
 205
 206         p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
 207         p += sprintf(p, "driver_version = %s", fmt);
 208         p += sprintf(p, "\nverext = %s", priv->version_str);
 209         p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);
 210
 211         if (info.bss_mode >= ARRAY_SIZE(bss_modes))
 212                 p += sprintf(p, "bss_mode=\"%d\"\n", info.bss_mode);
 213         else
 214                 p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);
 215
 216         p += sprintf(p, "media_state=\"%s\"\n",
 217                      (!priv->media_connected ? "Disconnected" : "Connected"));
 218         p += sprintf(p, "mac_address=\"%pM\"\n", netdev->dev_addr);
 219
 220         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
 221                 p += sprintf(p, "multicast_count=\"%d\"\n",
 222                              netdev_mc_count(netdev));
 223                 p += sprintf(p, "essid=\"%s\"\n", info.ssid.ssid);
 224                 p += sprintf(p, "bssid=\"%pM\"\n", info.bssid);
 225                 p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
 226                 p += sprintf(p, "country_code = \"%s\"\n", info.country_code);
 227
 228                 netdev_for_each_mc_addr(ha, netdev)
 229                         p += sprintf(p, "multicast_address[%d]=\"%pM\"\n",
 230                                         i++, ha->addr);
 231         }
 232
 233         p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
 234         p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
 235         p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
 236         p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
 237         p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
 238         p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
 239         p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
 240         p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
 241         p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
 242                                          ? "on" : "off"));
 243         p += sprintf(p, "tx queue");
 244         for (i = 0; i < netdev->num_tx_queues; i++) {
 245                 txq = netdev_get_tx_queue(netdev, i);
 246                 p += sprintf(p, " %d:%s", i, netif_tx_queue_stopped(txq) ?
 247                              "stopped" : "started");
 248         }
 249         p += sprintf(p, "\n");
 250
 251         ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
 252                                       (unsigned long) p - page);
 253
 254 free_and_exit:
 255         free_page(page);
 256         return ret;
 257 }
 258
 259 /*
 260  * Proc getlog file read handler.
 261  *
 262  * This function is called when the 'getlog' file is opened for reading
 263  * It prints the following log information -
 264  *      - Number of multicast Tx frames
 265  *      - Number of failed packets
 266  *      - Number of Tx retries
 267  *      - Number of multicast Tx retries
 268  *      - Number of duplicate frames
 269  *      - Number of RTS successes
 270  *      - Number of RTS failures
 271  *      - Number of ACK failures
 272  *      - Number of fragmented Rx frames
 273  *      - Number of multicast Rx frames
 274  *      - Number of FCS errors
 275  *      - Number of Tx frames
 276  *      - WEP ICV error counts
 277  */
 278 static ssize_t
 279 mwifiex_getlog_read(struct file *file, char __user *ubuf,
 280                     size_t count, loff_t *ppos)
 281 {
 282         struct mwifiex_private *priv =
 283                 (struct mwifiex_private *) file->private_data;
 284         unsigned long page = get_zeroed_page(GFP_KERNEL);
 285         char *p = (char *) page;
 286         ssize_t ret;
 287         struct mwifiex_ds_get_stats stats;
 288
 289         if (!p)
 290                 return -ENOMEM;
 291
 292         memset(&stats, 0, sizeof(stats));
 293         ret = mwifiex_get_stats_info(priv, &stats);
 294         if (ret)
 295                 goto free_and_exit;
 296
 297         p += sprintf(p, "\n"
 298                      "mcasttxframe     %u\n"
 299                      "failed           %u\n"
 300                      "retry            %u\n"
 301                      "multiretry       %u\n"
 302                      "framedup         %u\n"
 303                      "rtssuccess       %u\n"
 304                      "rtsfailure       %u\n"
 305                      "ackfailure       %u\n"
 306                      "rxfrag           %u\n"
 307                      "mcastrxframe     %u\n"
 308                      "fcserror         %u\n"
 309                      "txframe          %u\n"
 310                      "wepicverrcnt-1   %u\n"
 311                      "wepicverrcnt-2   %u\n"
 312                      "wepicverrcnt-3   %u\n"
 313                      "wepicverrcnt-4   %u\n",
 314                      stats.mcast_tx_frame,
 315                      stats.failed,
 316                      stats.retry,
 317                      stats.multi_retry,
 318                      stats.frame_dup,
 319                      stats.rts_success,
 320                      stats.rts_failure,
 321                      stats.ack_failure,
 322                      stats.rx_frag,
 323                      stats.mcast_rx_frame,
 324                      stats.fcs_error,
 325                      stats.tx_frame,
 326                      stats.wep_icv_error[0],
 327                      stats.wep_icv_error[1],
 328                      stats.wep_icv_error[2],
 329                      stats.wep_icv_error[3]);
 330
 331
 332         ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
 333                                       (unsigned long) p - page);
 334
 335 free_and_exit:
 336         free_page(page);
 337         return ret;
 338 }
 339
 340 static struct mwifiex_debug_info info;
 341
 342 /*
 343  * Proc debug file read handler.
 344  *
 345  * This function is called when the 'debug' file is opened for reading
 346  * It prints the following log information -
 347  *      - Interrupt count
 348  *      - WMM AC VO packets count
 349  *      - WMM AC VI packets count
 350  *      - WMM AC BE packets count
 351  *      - WMM AC BK packets count
 352  *      - Maximum Tx buffer size
 353  *      - Tx buffer size
 354  *      - Current Tx buffer size
 355  *      - Power Save mode
 356  *      - Power Save state
 357  *      - Deep Sleep status
 358  *      - Device wakeup required status
 359  *      - Number of wakeup tries
 360  *      - Host Sleep configured status
 361  *      - Host Sleep activated status
 362  *      - Number of Tx timeouts
 363  *      - Number of command timeouts
 364  *      - Last timed out command ID
 365  *      - Last timed out command action
 366  *      - Last command ID
 367  *      - Last command action
 368  *      - Last command index
 369  *      - Last command response ID
 370  *      - Last command response index
 371  *      - Last event
 372  *      - Last event index
 373  *      - Number of host to card command failures
 374  *      - Number of sleep confirm command failures
 375  *      - Number of host to card data failure
 376  *      - Number of deauthentication events
 377  *      - Number of disassociation events
 378  *      - Number of link lost events
 379  *      - Number of deauthentication commands
 380  *      - Number of association success commands
 381  *      - Number of association failure commands
 382  *      - Number of commands sent
 383  *      - Number of data packets sent
 384  *      - Number of command responses received
 385  *      - Number of events received
 386  *      - Tx BA stream table (TID, RA)
 387  *      - Rx reorder table (TID, TA, Start window, Window size, Buffer)
 388  */
 389 static ssize_t
 390 mwifiex_debug_read(struct file *file, char __user *ubuf,
 391                    size_t count, loff_t *ppos)
 392 {
 393         struct mwifiex_private *priv =
 394                 (struct mwifiex_private *) file->private_data;
 395         struct mwifiex_debug_data *d = &items[0];
 396         unsigned long page = get_zeroed_page(GFP_KERNEL);
 397         char *p = (char *) page;
 398         ssize_t ret;
 399         size_t size, addr;
 400         long val;
 401         int i, j;
 402
 403         if (!p)
 404                 return -ENOMEM;
 405
 406         ret = mwifiex_get_debug_info(priv, &info);
 407         if (ret)
 408                 goto free_and_exit;
 409
 410         for (i = 0; i < num_of_items; i++) {
 411                 p += sprintf(p, "%s=", d[i].name);
 412
 413                 size = d[i].size / d[i].num;
 414
 415                 if (i < (num_of_items - 3))
 416                         addr = d[i].addr + (size_t) &info;
 417                 else /* The last 3 items are struct mwifiex_adapter variables */
 418                         addr = d[i].addr + (size_t) priv->adapter;
 419
 420                 for (j = 0; j < d[i].num; j++) {
 421                         switch (size) {
 422                         case 1:
 423                                 val = *((u8 *) addr);
 424                                 break;
 425                         case 2:
 426                                 val = *((u16 *) addr);
 427                                 break;
 428                         case 4:
 429                                 val = *((u32 *) addr);
 430                                 break;
 431                         case 8:
 432                                 val = *((long long *) addr);
 433                                 break;
 434                         default:
 435                                 val = -1;
 436                                 break;
 437                         }
 438
 439                         p += sprintf(p, "%#lx ", val);
 440                         addr += size;
 441                 }
 442
 443                 p += sprintf(p, "\n");
 444         }
 445
 446         if (info.tx_tbl_num) {
 447                 p += sprintf(p, "Tx BA stream table:\n");
 448                 for (i = 0; i < info.tx_tbl_num; i++)
 449                         p += sprintf(p, "tid = %d, ra = %pM\n",
 450                                      info.tx_tbl[i].tid, info.tx_tbl[i].ra);
 451         }
 452
 453         if (info.rx_tbl_num) {
 454                 p += sprintf(p, "Rx reorder table:\n");
 455                 for (i = 0; i < info.rx_tbl_num; i++) {
 456                         p += sprintf(p, "tid = %d, ta = %pM, "
 457                                      "start_win = %d, "
 458                                      "win_size = %d, buffer: ",
 459                                      info.rx_tbl[i].tid,
 460                                      info.rx_tbl[i].ta,
 461                                      info.rx_tbl[i].start_win,
 462                                      info.rx_tbl[i].win_size);
 463
 464                         for (j = 0; j < info.rx_tbl[i].win_size; j++)
 465                                 p += sprintf(p, "%c ",
 466                                              info.rx_tbl[i].buffer[j] ?
 467                                              '1' : '0');
 468
 469                         p += sprintf(p, "\n");
 470                 }
 471         }
 472
 473         ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
 474                                       (unsigned long) p - page);
 475
 476 free_and_exit:
 477         free_page(page);
 478         return ret;
 479 }
 480
 481 static u32 saved_reg_type, saved_reg_offset, saved_reg_value;
 482
 483 /*
 484  * Proc regrdwr file write handler.
 485  *
 486  * This function is called when the 'regrdwr' file is opened for writing
 487  *
 488  * This function can be used to write to a register.
 489  */
 490 static ssize_t
 491 mwifiex_regrdwr_write(struct file *file,
 492                       const char __user *ubuf, size_t count, loff_t *ppos)
 493 {
 494         unsigned long addr = get_zeroed_page(GFP_KERNEL);
 495         char *buf = (char *) addr;
 496         size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
 497         int ret;
 498         u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;
 499
 500         if (!buf)
 501                 return -ENOMEM;
 502
 503
 504         if (copy_from_user(buf, ubuf, buf_size)) {
 505                 ret = -EFAULT;
 506                 goto done;
 507         }
 508
 509         sscanf(buf, "%u %x %x", &reg_type, &reg_offset, &reg_value);
 510
 511         if (reg_type == 0 || reg_offset == 0) {
 512                 ret = -EINVAL;
 513                 goto done;
 514         } else {
 515                 saved_reg_type = reg_type;
 516                 saved_reg_offset = reg_offset;
 517                 saved_reg_value = reg_value;
 518                 ret = count;
 519         }
 520 done:
 521         free_page(addr);
 522         return ret;
 523 }
 524
 525 /*
 526  * Proc regrdwr file read handler.
 527  *
 528  * This function is called when the 'regrdwr' file is opened for reading
 529  *
 530  * This function can be used to read from a register.
 531  */
 532 static ssize_t
 533 mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
 534                      size_t count, loff_t *ppos)
 535 {
 536         struct mwifiex_private *priv =
 537                 (struct mwifiex_private *) file->private_data;
 538         unsigned long addr = get_zeroed_page(GFP_KERNEL);
 539         char *buf = (char *) addr;
 540         int pos = 0, ret = 0;
 541         u32 reg_value;
 542
 543         if (!buf)
 544                 return -ENOMEM;
 545
 546         if (!saved_reg_type) {
 547                 /* No command has been given */
 548                 pos += snprintf(buf, PAGE_SIZE, "0");
 549                 goto done;
 550         }
 551         /* Set command has been given */
 552         if (saved_reg_value != UINT_MAX) {
 553                 ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
 554                                         saved_reg_value);
 555
 556                 pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
 557                                 saved_reg_type, saved_reg_offset,
 558                                 saved_reg_value);
 559
 560                 ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
 561
 562                 goto done;
 563         }
 564         /* Get command has been given */
 565         ret = mwifiex_reg_read(priv, saved_reg_type,
 566                                saved_reg_offset, &reg_value);
 567         if (ret) {
 568                 ret = -EINVAL;
 569                 goto done;
 570         }
 571
 572         pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
 573                         saved_reg_offset, reg_value);
 574
 575         ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
 576
 577 done:
 578         free_page(addr);
 579         return ret;
 580 }
 581
 582 static u32 saved_offset = -1, saved_bytes = -1;
 583
 584 /*
 585  * Proc rdeeprom file write handler.
 586  *
 587  * This function is called when the 'rdeeprom' file is opened for writing
 588  *
 589  * This function can be used to write to a RDEEPROM location.
 590  */
 591 static ssize_t
 592 mwifiex_rdeeprom_write(struct file *file,
 593                        const char __user *ubuf, size_t count, loff_t *ppos)
 594 {
 595         unsigned long addr = get_zeroed_page(GFP_KERNEL);
 596         char *buf = (char *) addr;
 597         size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
 598         int ret = 0;
 599         int offset = -1, bytes = -1;
 600
 601         if (!buf)
 602                 return -ENOMEM;
 603
 604
 605         if (copy_from_user(buf, ubuf, buf_size)) {
 606                 ret = -EFAULT;
 607                 goto done;
 608         }
 609
 610         sscanf(buf, "%d %d", &offset, &bytes);
 611
 612         if (offset == -1 || bytes == -1) {
 613                 ret = -EINVAL;
 614                 goto done;
 615         } else {
 616                 saved_offset = offset;
 617                 saved_bytes = bytes;
 618                 ret = count;
 619         }
 620 done:
 621         free_page(addr);
 622         return ret;
 623 }
 624
 625 /*
 626  * Proc rdeeprom read write handler.
 627  *
 628  * This function is called when the 'rdeeprom' file is opened for reading
 629  *
 630  * This function can be used to read from a RDEEPROM location.
 631  */
 632 static ssize_t
 633 mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
 634                       size_t count, loff_t *ppos)
 635 {
 636         struct mwifiex_private *priv =
 637                 (struct mwifiex_private *) file->private_data;
 638         unsigned long addr = get_zeroed_page(GFP_KERNEL);
 639         char *buf = (char *) addr;
 640         int pos = 0, ret = 0, i;
 641         u8 value[MAX_EEPROM_DATA];
 642
 643         if (!buf)
 644                 return -ENOMEM;
 645
 646         if (saved_offset == -1) {
 647                 /* No command has been given */
 648                 pos += snprintf(buf, PAGE_SIZE, "0");
 649                 goto done;
 650         }
 651
 652         /* Get command has been given */
 653         ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
 654                                   (u16) saved_bytes, value);
 655         if (ret) {
 656                 ret = -EINVAL;
 657                 goto done;
 658         }
 659
 660         pos += snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);
 661
 662         for (i = 0; i < saved_bytes; i++)
 663                 pos += snprintf(buf + strlen(buf), PAGE_SIZE, "%d ", value[i]);
 664
 665         ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
 666
 667 done:
 668         free_page(addr);
 669         return ret;
 670 }
 671
 672
 673 #define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
 674         if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
 675                         priv, &mwifiex_dfs_##name##_fops))              \
 676                 return;                                                 \
 677 } while (0);
 678
 679 #define MWIFIEX_DFS_FILE_OPS(name)                                      \
 680 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
 681         .read = mwifiex_##name##_read,                                  \
 682         .write = mwifiex_##name##_write,                                \
 683         .open = simple_open,                                            \
 684 };
 685
 686 #define MWIFIEX_DFS_FILE_READ_OPS(name)                                 \
 687 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
 688         .read = mwifiex_##name##_read,                                  \
 689         .open = simple_open,                                            \
 690 };
 691
 692 #define MWIFIEX_DFS_FILE_WRITE_OPS(name)                                \
 693 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
 694         .write = mwifiex_##name##_write,                                \
 695         .open = simple_open,                                            \
 696 };
 697
 698
 699 MWIFIEX_DFS_FILE_READ_OPS(info);
 700 MWIFIEX_DFS_FILE_READ_OPS(debug);
 701 MWIFIEX_DFS_FILE_READ_OPS(getlog);
 702 MWIFIEX_DFS_FILE_OPS(regrdwr);
 703 MWIFIEX_DFS_FILE_OPS(rdeeprom);
 704
 705 /*
 706  * This function creates the debug FS directory structure and the files.
 707  */
 708 void
 709 mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
 710 {
 711         if (!mwifiex_dfs_dir || !priv)
 712                 return;
 713
 714         priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
 715                                                mwifiex_dfs_dir);
 716
 717         if (!priv->dfs_dev_dir)
 718                 return;
 719
 720         MWIFIEX_DFS_ADD_FILE(info);
 721         MWIFIEX_DFS_ADD_FILE(debug);
 722         MWIFIEX_DFS_ADD_FILE(getlog);
 723         MWIFIEX_DFS_ADD_FILE(regrdwr);
 724         MWIFIEX_DFS_ADD_FILE(rdeeprom);
 725 }
 726
 727 /*
 728  * This function removes the debug FS directory structure and the files.
 729  */
 730 void
 731 mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
 732 {
 733         if (!priv)
 734                 return;
 735
 736         debugfs_remove_recursive(priv->dfs_dev_dir);
 737 }
 738
 739 /*
 740  * This function creates the top level proc directory.
 741  */
 742 void
 743 mwifiex_debugfs_init(void)
 744 {
 745         if (!mwifiex_dfs_dir)
 746                 mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
 747 }
 748
 749 /*
 750  * This function removes the top level proc directory.
 751  */
 752 void
 753 mwifiex_debugfs_remove(void)
 754 {
 755         if (mwifiex_dfs_dir)
 756                 debugfs_remove(mwifiex_dfs_dir);
 757 }