drivers/net/wireless/ath/ath10k/testmode.c

   1 /*
   2  * Copyright (c) 2014 Qualcomm Atheros, 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 "testmode.h"
  18
  19 #include <net/netlink.h>
  20 #include <linux/firmware.h>
  21
  22 #include "debug.h"
  23 #include "wmi.h"
  24 #include "hif.h"
  25 #include "hw.h"
  26
  27 #include "testmode_i.h"
  28
  29 static const struct nla_policy ath10k_tm_policy[ATH10K_TM_ATTR_MAX + 1] = {
  30         [ATH10K_TM_ATTR_CMD]            = { .type = NLA_U32 },
  31         [ATH10K_TM_ATTR_DATA]           = { .type = NLA_BINARY,
  32                                             .len = ATH10K_TM_DATA_MAX_LEN },
  33         [ATH10K_TM_ATTR_WMI_CMDID]      = { .type = NLA_U32 },
  34         [ATH10K_TM_ATTR_VERSION_MAJOR]  = { .type = NLA_U32 },
  35         [ATH10K_TM_ATTR_VERSION_MINOR]  = { .type = NLA_U32 },
  36 };
  37
  38 /* Returns true if callee consumes the skb and the skb should be discarded.
  39  * Returns false if skb is not used. Does not sleep.
  40  */
  41 bool ath10k_tm_event_wmi(struct ath10k *ar, u32 cmd_id, struct sk_buff *skb)
  42 {
  43         struct sk_buff *nl_skb;
  44         bool consumed;
  45         int ret;
  46
  47         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
  48                    "testmode event wmi cmd_id %d skb %p skb->len %d\n",
  49                    cmd_id, skb, skb->len);
  50
  51         ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
  52
  53         spin_lock_bh(&ar->data_lock);
  54
  55         if (!ar->testmode.utf_monitor) {
  56                 consumed = false;
  57                 goto out;
  58         }
  59
  60         /* Only testmode.c should be handling events from utf firmware,
  61          * otherwise all sort of problems will arise as mac80211 operations
  62          * are not initialised.
  63          */
  64         consumed = true;
  65
  66         nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
  67                                                    2 * sizeof(u32) + skb->len,
  68                                                    GFP_ATOMIC);
  69         if (!nl_skb) {
  70                 ath10k_warn(ar,
  71                             "failed to allocate skb for testmode wmi event\n");
  72                 goto out;
  73         }
  74
  75         ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_CMD, ATH10K_TM_CMD_WMI);
  76         if (ret) {
  77                 ath10k_warn(ar,
  78                             "failed to to put testmode wmi event cmd attribute: %d\n",
  79                             ret);
  80                 kfree_skb(nl_skb);
  81                 goto out;
  82         }
  83
  84         ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_WMI_CMDID, cmd_id);
  85         if (ret) {
  86                 ath10k_warn(ar,
  87                             "failed to to put testmode wmi even cmd_id: %d\n",
  88                             ret);
  89                 kfree_skb(nl_skb);
  90                 goto out;
  91         }
  92
  93         ret = nla_put(nl_skb, ATH10K_TM_ATTR_DATA, skb->len, skb->data);
  94         if (ret) {
  95                 ath10k_warn(ar,
  96                             "failed to copy skb to testmode wmi event: %d\n",
  97                             ret);
  98                 kfree_skb(nl_skb);
  99                 goto out;
 100         }
 101
 102         cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
 103
 104 out:
 105         spin_unlock_bh(&ar->data_lock);
 106
 107         return consumed;
 108 }
 109
 110 static int ath10k_tm_cmd_get_version(struct ath10k *ar, struct nlattr *tb[])
 111 {
 112         struct sk_buff *skb;
 113         int ret;
 114
 115         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 116                    "testmode cmd get version_major %d version_minor %d\n",
 117                    ATH10K_TESTMODE_VERSION_MAJOR,
 118                    ATH10K_TESTMODE_VERSION_MINOR);
 119
 120         skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
 121                                                 nla_total_size(sizeof(u32)));
 122         if (!skb)
 123                 return -ENOMEM;
 124
 125         ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MAJOR,
 126                           ATH10K_TESTMODE_VERSION_MAJOR);
 127         if (ret) {
 128                 kfree_skb(skb);
 129                 return ret;
 130         }
 131
 132         ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MINOR,
 133                           ATH10K_TESTMODE_VERSION_MINOR);
 134         if (ret) {
 135                 kfree_skb(skb);
 136                 return ret;
 137         }
 138
 139         return cfg80211_testmode_reply(skb);
 140 }
 141
 142 static int ath10k_tm_fetch_utf_firmware_api_2(struct ath10k *ar)
 143 {
 144         size_t len, magic_len, ie_len;
 145         struct ath10k_fw_ie *hdr;
 146         char filename[100];
 147         __le32 *version;
 148         const u8 *data;
 149         int ie_id, ret;
 150
 151         snprintf(filename, sizeof(filename), "%s/%s",
 152                  ar->hw_params.fw.dir, ATH10K_FW_UTF_API2_FILE);
 153
 154         /* load utf firmware image */
 155         ret = request_firmware(&ar->testmode.utf, filename, ar->dev);
 156         if (ret) {
 157                 ath10k_warn(ar, "failed to retrieve utf firmware '%s': %d\n",
 158                             filename, ret);
 159                 return ret;
 160         }
 161
 162         data = ar->testmode.utf->data;
 163         len = ar->testmode.utf->size;
 164
 165         /* FIXME: call release_firmware() in error cases */
 166
 167         /* magic also includes the null byte, check that as well */
 168         magic_len = strlen(ATH10K_FIRMWARE_MAGIC) + 1;
 169
 170         if (len < magic_len) {
 171                 ath10k_err(ar, "utf firmware file is too small to contain magic\n");
 172                 ret = -EINVAL;
 173                 goto err;
 174         }
 175
 176         if (memcmp(data, ATH10K_FIRMWARE_MAGIC, magic_len) != 0) {
 177                 ath10k_err(ar, "invalid firmware magic\n");
 178                 ret = -EINVAL;
 179                 goto err;
 180         }
 181
 182         /* jump over the padding */
 183         magic_len = ALIGN(magic_len, 4);
 184
 185         len -= magic_len;
 186         data += magic_len;
 187
 188         /* loop elements */
 189         while (len > sizeof(struct ath10k_fw_ie)) {
 190                 hdr = (struct ath10k_fw_ie *)data;
 191
 192                 ie_id = le32_to_cpu(hdr->id);
 193                 ie_len = le32_to_cpu(hdr->len);
 194
 195                 len -= sizeof(*hdr);
 196                 data += sizeof(*hdr);
 197
 198                 if (len < ie_len) {
 199                         ath10k_err(ar, "invalid length for FW IE %d (%zu < %zu)\n",
 200                                    ie_id, len, ie_len);
 201                         ret = -EINVAL;
 202                         goto err;
 203                 }
 204
 205                 switch (ie_id) {
 206                 case ATH10K_FW_IE_FW_VERSION:
 207                         if (ie_len > sizeof(ar->testmode.utf_version) - 1)
 208                                 break;
 209
 210                         memcpy(ar->testmode.utf_version, data, ie_len);
 211                         ar->testmode.utf_version[ie_len] = '\0';
 212
 213                         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 214                                    "testmode found fw utf version %s\n",
 215                                    ar->testmode.utf_version);
 216                         break;
 217                 case ATH10K_FW_IE_TIMESTAMP:
 218                         /* ignore timestamp, but don't warn about it either */
 219                         break;
 220                 case ATH10K_FW_IE_FW_IMAGE:
 221                         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 222                                    "testmode found fw image ie (%zd B)\n",
 223                                    ie_len);
 224
 225                         ar->testmode.utf_firmware_data = data;
 226                         ar->testmode.utf_firmware_len = ie_len;
 227                         break;
 228                 case ATH10K_FW_IE_WMI_OP_VERSION:
 229                         if (ie_len != sizeof(u32))
 230                                 break;
 231                         version = (__le32 *)data;
 232                         ar->testmode.op_version = le32_to_cpup(version);
 233                         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode found fw ie wmi op version %d\n",
 234                                    ar->testmode.op_version);
 235                         break;
 236                 default:
 237                         ath10k_warn(ar, "Unknown testmode FW IE: %u\n",
 238                                     le32_to_cpu(hdr->id));
 239                         break;
 240                 }
 241                 /* jump over the padding */
 242                 ie_len = ALIGN(ie_len, 4);
 243
 244                 len -= ie_len;
 245                 data += ie_len;
 246         }
 247
 248         if (!ar->testmode.utf_firmware_data || !ar->testmode.utf_firmware_len) {
 249                 ath10k_err(ar, "No ATH10K_FW_IE_FW_IMAGE found\n");
 250                 ret = -EINVAL;
 251                 goto err;
 252         }
 253
 254         return 0;
 255
 256 err:
 257         release_firmware(ar->testmode.utf);
 258
 259         return ret;
 260 }
 261
 262 static int ath10k_tm_fetch_utf_firmware_api_1(struct ath10k *ar)
 263 {
 264         char filename[100];
 265         int ret;
 266
 267         snprintf(filename, sizeof(filename), "%s/%s",
 268                  ar->hw_params.fw.dir, ATH10K_FW_UTF_FILE);
 269
 270         /* load utf firmware image */
 271         ret = request_firmware(&ar->testmode.utf, filename, ar->dev);
 272         if (ret) {
 273                 ath10k_warn(ar, "failed to retrieve utf firmware '%s': %d\n",
 274                             filename, ret);
 275                 return ret;
 276         }
 277
 278         /* We didn't find FW UTF API 1 ("utf.bin") does not advertise
 279          * firmware features. Do an ugly hack where we force the firmware
 280          * features to match with 10.1 branch so that wmi.c will use the
 281          * correct WMI interface.
 282          */
 283
 284         ar->testmode.op_version = ATH10K_FW_WMI_OP_VERSION_10_1;
 285         ar->testmode.utf_firmware_data = ar->testmode.utf->data;
 286         ar->testmode.utf_firmware_len = ar->testmode.utf->size;
 287
 288         return 0;
 289 }
 290
 291 static int ath10k_tm_fetch_firmware(struct ath10k *ar)
 292 {
 293         int ret;
 294
 295         ret = ath10k_tm_fetch_utf_firmware_api_2(ar);
 296         if (ret == 0) {
 297                 ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode using fw utf api 2");
 298                 return 0;
 299         }
 300
 301         ret = ath10k_tm_fetch_utf_firmware_api_1(ar);
 302         if (ret) {
 303                 ath10k_err(ar, "failed to fetch utf firmware binary: %d", ret);
 304                 return ret;
 305         }
 306
 307         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode using utf api 1");
 308
 309         return 0;
 310 }
 311
 312 static int ath10k_tm_cmd_utf_start(struct ath10k *ar, struct nlattr *tb[])
 313 {
 314         const char *ver;
 315         int ret;
 316
 317         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf start\n");
 318
 319         mutex_lock(&ar->conf_mutex);
 320
 321         if (ar->state == ATH10K_STATE_UTF) {
 322                 ret = -EALREADY;
 323                 goto err;
 324         }
 325
 326         /* start utf only when the driver is not in use  */
 327         if (ar->state != ATH10K_STATE_OFF) {
 328                 ret = -EBUSY;
 329                 goto err;
 330         }
 331
 332         if (WARN_ON(ar->testmode.utf != NULL)) {
 333                 /* utf image is already downloaded, it shouldn't be */
 334                 ret = -EEXIST;
 335                 goto err;
 336         }
 337
 338         ret = ath10k_tm_fetch_firmware(ar);
 339         if (ret) {
 340                 ath10k_err(ar, "failed to fetch UTF firmware: %d", ret);
 341                 goto err;
 342         }
 343
 344         spin_lock_bh(&ar->data_lock);
 345         ar->testmode.utf_monitor = true;
 346         spin_unlock_bh(&ar->data_lock);
 347         BUILD_BUG_ON(sizeof(ar->fw_features) !=
 348                      sizeof(ar->testmode.orig_fw_features));
 349
 350         memcpy(ar->testmode.orig_fw_features, ar->fw_features,
 351                sizeof(ar->fw_features));
 352         ar->testmode.orig_wmi_op_version = ar->wmi.op_version;
 353         memset(ar->fw_features, 0, sizeof(ar->fw_features));
 354
 355         ar->wmi.op_version = ar->testmode.op_version;
 356
 357         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode wmi version %d\n",
 358                    ar->wmi.op_version);
 359
 360         ret = ath10k_hif_power_up(ar);
 361         if (ret) {
 362                 ath10k_err(ar, "failed to power up hif (testmode): %d\n", ret);
 363                 ar->state = ATH10K_STATE_OFF;
 364                 goto err_fw_features;
 365         }
 366
 367         ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_UTF);
 368         if (ret) {
 369                 ath10k_err(ar, "failed to start core (testmode): %d\n", ret);
 370                 ar->state = ATH10K_STATE_OFF;
 371                 goto err_power_down;
 372         }
 373
 374         ar->state = ATH10K_STATE_UTF;
 375
 376         if (strlen(ar->testmode.utf_version) > 0)
 377                 ver = ar->testmode.utf_version;
 378         else
 379                 ver = "API 1";
 380
 381         ath10k_info(ar, "UTF firmware %s started\n", ver);
 382
 383         mutex_unlock(&ar->conf_mutex);
 384
 385         return 0;
 386
 387 err_power_down:
 388         ath10k_hif_power_down(ar);
 389
 390 err_fw_features:
 391         /* return the original firmware features */
 392         memcpy(ar->fw_features, ar->testmode.orig_fw_features,
 393                sizeof(ar->fw_features));
 394         ar->wmi.op_version = ar->testmode.orig_wmi_op_version;
 395
 396         release_firmware(ar->testmode.utf);
 397         ar->testmode.utf = NULL;
 398
 399 err:
 400         mutex_unlock(&ar->conf_mutex);
 401
 402         return ret;
 403 }
 404
 405 static void __ath10k_tm_cmd_utf_stop(struct ath10k *ar)
 406 {
 407         lockdep_assert_held(&ar->conf_mutex);
 408
 409         ath10k_core_stop(ar);
 410         ath10k_hif_power_down(ar);
 411
 412         spin_lock_bh(&ar->data_lock);
 413
 414         ar->testmode.utf_monitor = false;
 415
 416         spin_unlock_bh(&ar->data_lock);
 417
 418         /* return the original firmware features */
 419         memcpy(ar->fw_features, ar->testmode.orig_fw_features,
 420                sizeof(ar->fw_features));
 421         ar->wmi.op_version = ar->testmode.orig_wmi_op_version;
 422
 423         release_firmware(ar->testmode.utf);
 424         ar->testmode.utf = NULL;
 425
 426         ar->state = ATH10K_STATE_OFF;
 427 }
 428
 429 static int ath10k_tm_cmd_utf_stop(struct ath10k *ar, struct nlattr *tb[])
 430 {
 431         int ret;
 432
 433         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf stop\n");
 434
 435         mutex_lock(&ar->conf_mutex);
 436
 437         if (ar->state != ATH10K_STATE_UTF) {
 438                 ret = -ENETDOWN;
 439                 goto out;
 440         }
 441
 442         __ath10k_tm_cmd_utf_stop(ar);
 443
 444         ret = 0;
 445
 446         ath10k_info(ar, "UTF firmware stopped\n");
 447
 448 out:
 449         mutex_unlock(&ar->conf_mutex);
 450         return ret;
 451 }
 452
 453 static int ath10k_tm_cmd_wmi(struct ath10k *ar, struct nlattr *tb[])
 454 {
 455         struct sk_buff *skb;
 456         int ret, buf_len;
 457         u32 cmd_id;
 458         void *buf;
 459
 460         mutex_lock(&ar->conf_mutex);
 461
 462         if (ar->state != ATH10K_STATE_UTF) {
 463                 ret = -ENETDOWN;
 464                 goto out;
 465         }
 466
 467         if (!tb[ATH10K_TM_ATTR_DATA]) {
 468                 ret = -EINVAL;
 469                 goto out;
 470         }
 471
 472         if (!tb[ATH10K_TM_ATTR_WMI_CMDID]) {
 473                 ret = -EINVAL;
 474                 goto out;
 475         }
 476
 477         buf = nla_data(tb[ATH10K_TM_ATTR_DATA]);
 478         buf_len = nla_len(tb[ATH10K_TM_ATTR_DATA]);
 479         cmd_id = nla_get_u32(tb[ATH10K_TM_ATTR_WMI_CMDID]);
 480
 481         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 482                    "testmode cmd wmi cmd_id %d buf %p buf_len %d\n",
 483                    cmd_id, buf, buf_len);
 484
 485         ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", buf, buf_len);
 486
 487         skb = ath10k_wmi_alloc_skb(ar, buf_len);
 488         if (!skb) {
 489                 ret = -ENOMEM;
 490                 goto out;
 491         }
 492
 493         memcpy(skb->data, buf, buf_len);
 494
 495         ret = ath10k_wmi_cmd_send(ar, skb, cmd_id);
 496         if (ret) {
 497                 ath10k_warn(ar, "failed to transmit wmi command (testmode): %d\n",
 498                             ret);
 499                 goto out;
 500         }
 501
 502         ret = 0;
 503
 504 out:
 505         mutex_unlock(&ar->conf_mutex);
 506         return ret;
 507 }
 508
 509 int ath10k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 510                   void *data, int len)
 511 {
 512         struct ath10k *ar = hw->priv;
 513         struct nlattr *tb[ATH10K_TM_ATTR_MAX + 1];
 514         int ret;
 515
 516         ret = nla_parse(tb, ATH10K_TM_ATTR_MAX, data, len,
 517                         ath10k_tm_policy);
 518         if (ret)
 519                 return ret;
 520
 521         if (!tb[ATH10K_TM_ATTR_CMD])
 522                 return -EINVAL;
 523
 524         switch (nla_get_u32(tb[ATH10K_TM_ATTR_CMD])) {
 525         case ATH10K_TM_CMD_GET_VERSION:
 526                 return ath10k_tm_cmd_get_version(ar, tb);
 527         case ATH10K_TM_CMD_UTF_START:
 528                 return ath10k_tm_cmd_utf_start(ar, tb);
 529         case ATH10K_TM_CMD_UTF_STOP:
 530                 return ath10k_tm_cmd_utf_stop(ar, tb);
 531         case ATH10K_TM_CMD_WMI:
 532                 return ath10k_tm_cmd_wmi(ar, tb);
 533         default:
 534                 return -EOPNOTSUPP;
 535         }
 536 }
 537
 538 void ath10k_testmode_destroy(struct ath10k *ar)
 539 {
 540         mutex_lock(&ar->conf_mutex);
 541
 542         if (ar->state != ATH10K_STATE_UTF) {
 543                 /* utf firmware is not running, nothing to do */
 544                 goto out;
 545         }
 546
 547         __ath10k_tm_cmd_utf_stop(ar);
 548
 549 out:
 550         mutex_unlock(&ar->conf_mutex);
 551 }