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 #include "core.h"
  27
  28 #include "testmode_i.h"
  29
  30 static const struct nla_policy ath10k_tm_policy[ATH10K_TM_ATTR_MAX + 1] = {
  31         [ATH10K_TM_ATTR_CMD]            = { .type = NLA_U32 },
  32         [ATH10K_TM_ATTR_DATA]           = { .type = NLA_BINARY,
  33                                             .len = ATH10K_TM_DATA_MAX_LEN },
  34         [ATH10K_TM_ATTR_WMI_CMDID]      = { .type = NLA_U32 },
  35         [ATH10K_TM_ATTR_VERSION_MAJOR]  = { .type = NLA_U32 },
  36         [ATH10K_TM_ATTR_VERSION_MINOR]  = { .type = NLA_U32 },
  37 };
  38
  39 /* Returns true if callee consumes the skb and the skb should be discarded.
  40  * Returns false if skb is not used. Does not sleep.
  41  */
  42 bool ath10k_tm_event_wmi(struct ath10k *ar, u32 cmd_id, struct sk_buff *skb)
  43 {
  44         struct sk_buff *nl_skb;
  45         bool consumed;
  46         int ret;
  47
  48         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
  49                    "testmode event wmi cmd_id %d skb %pK skb->len %d\n",
  50                    cmd_id, skb, skb->len);
  51
  52         ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
  53
  54         spin_lock_bh(&ar->data_lock);
  55
  56         if (!ar->testmode.utf_monitor) {
  57                 consumed = false;
  58                 goto out;
  59         }
  60
  61         /* Only testmode.c should be handling events from utf firmware,
  62          * otherwise all sort of problems will arise as mac80211 operations
  63          * are not initialised.
  64          */
  65         consumed = true;
  66
  67         nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
  68                                                    2 * sizeof(u32) + skb->len,
  69                                                    GFP_ATOMIC);
  70         if (!nl_skb) {
  71                 ath10k_warn(ar,
  72                             "failed to allocate skb for testmode wmi event\n");
  73                 goto out;
  74         }
  75
  76         ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_CMD, ATH10K_TM_CMD_WMI);
  77         if (ret) {
  78                 ath10k_warn(ar,
  79                             "failed to to put testmode wmi event cmd attribute: %d\n",
  80                             ret);
  81                 kfree_skb(nl_skb);
  82                 goto out;
  83         }
  84
  85         ret = nla_put_u32(nl_skb, ATH10K_TM_ATTR_WMI_CMDID, cmd_id);
  86         if (ret) {
  87                 ath10k_warn(ar,
  88                             "failed to to put testmode wmi even cmd_id: %d\n",
  89                             ret);
  90                 kfree_skb(nl_skb);
  91                 goto out;
  92         }
  93
  94         ret = nla_put(nl_skb, ATH10K_TM_ATTR_DATA, skb->len, skb->data);
  95         if (ret) {
  96                 ath10k_warn(ar,
  97                             "failed to copy skb to testmode wmi event: %d\n",
  98                             ret);
  99                 kfree_skb(nl_skb);
 100                 goto out;
 101         }
 102
 103         cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
 104
 105 out:
 106         spin_unlock_bh(&ar->data_lock);
 107
 108         return consumed;
 109 }
 110
 111 static int ath10k_tm_cmd_get_version(struct ath10k *ar, struct nlattr *tb[])
 112 {
 113         struct sk_buff *skb;
 114         int ret;
 115
 116         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 117                    "testmode cmd get version_major %d version_minor %d\n",
 118                    ATH10K_TESTMODE_VERSION_MAJOR,
 119                    ATH10K_TESTMODE_VERSION_MINOR);
 120
 121         skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
 122                                                 nla_total_size(sizeof(u32)));
 123         if (!skb)
 124                 return -ENOMEM;
 125
 126         ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MAJOR,
 127                           ATH10K_TESTMODE_VERSION_MAJOR);
 128         if (ret) {
 129                 kfree_skb(skb);
 130                 return ret;
 131         }
 132
 133         ret = nla_put_u32(skb, ATH10K_TM_ATTR_VERSION_MINOR,
 134                           ATH10K_TESTMODE_VERSION_MINOR);
 135         if (ret) {
 136                 kfree_skb(skb);
 137                 return ret;
 138         }
 139
 140         return cfg80211_testmode_reply(skb);
 141 }
 142
 143 static int ath10k_tm_fetch_utf_firmware_api_1(struct ath10k *ar,
 144                                               struct ath10k_fw_file *fw_file)
 145 {
 146         char filename[100];
 147         int ret;
 148
 149         snprintf(filename, sizeof(filename), "%s/%s",
 150                  ar->hw_params.fw.dir, ATH10K_FW_UTF_FILE);
 151
 152         /* load utf firmware image */
 153         ret = request_firmware(&fw_file->firmware, filename, ar->dev);
 154         if (ret) {
 155                 ath10k_warn(ar, "failed to retrieve utf firmware '%s': %d\n",
 156                             filename, ret);
 157                 return ret;
 158         }
 159
 160         /* We didn't find FW UTF API 1 ("utf.bin") does not advertise
 161          * firmware features. Do an ugly hack where we force the firmware
 162          * features to match with 10.1 branch so that wmi.c will use the
 163          * correct WMI interface.
 164          */
 165
 166         fw_file->wmi_op_version = ATH10K_FW_WMI_OP_VERSION_10_1;
 167         fw_file->htt_op_version = ATH10K_FW_HTT_OP_VERSION_10_1;
 168         fw_file->firmware_data = fw_file->firmware->data;
 169         fw_file->firmware_len = fw_file->firmware->size;
 170
 171         return 0;
 172 }
 173
 174 static int ath10k_tm_fetch_firmware(struct ath10k *ar)
 175 {
 176         struct ath10k_fw_components *utf_mode_fw;
 177         int ret;
 178
 179         ret = ath10k_core_fetch_firmware_api_n(ar, ATH10K_FW_UTF_API2_FILE,
 180                                                &ar->testmode.utf_mode_fw.fw_file);
 181         if (ret == 0) {
 182                 ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode using fw utf api 2");
 183                 goto out;
 184         }
 185
 186         ret = ath10k_tm_fetch_utf_firmware_api_1(ar, &ar->testmode.utf_mode_fw.fw_file);
 187         if (ret) {
 188                 ath10k_err(ar, "failed to fetch utf firmware binary: %d", ret);
 189                 return ret;
 190         }
 191
 192         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode using utf api 1");
 193
 194 out:
 195         utf_mode_fw = &ar->testmode.utf_mode_fw;
 196
 197         /* Use the same board data file as the normal firmware uses (but
 198          * it's still "owned" by normal_mode_fw so we shouldn't free it.
 199          */
 200         utf_mode_fw->board_data = ar->normal_mode_fw.board_data;
 201         utf_mode_fw->board_len = ar->normal_mode_fw.board_len;
 202
 203         if (!utf_mode_fw->fw_file.otp_data) {
 204                 ath10k_info(ar, "utf.bin didn't contain otp binary, taking it from the normal mode firmware");
 205                 utf_mode_fw->fw_file.otp_data = ar->normal_mode_fw.fw_file.otp_data;
 206                 utf_mode_fw->fw_file.otp_len = ar->normal_mode_fw.fw_file.otp_len;
 207         }
 208
 209         return 0;
 210 }
 211
 212 static int ath10k_tm_cmd_utf_start(struct ath10k *ar, struct nlattr *tb[])
 213 {
 214         const char *ver;
 215         int ret;
 216
 217         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf start\n");
 218
 219         mutex_lock(&ar->conf_mutex);
 220
 221         if (ar->state == ATH10K_STATE_UTF) {
 222                 ret = -EALREADY;
 223                 goto err;
 224         }
 225
 226         /* start utf only when the driver is not in use  */
 227         if (ar->state != ATH10K_STATE_OFF) {
 228                 ret = -EBUSY;
 229                 goto err;
 230         }
 231
 232         if (WARN_ON(ar->testmode.utf_mode_fw.fw_file.firmware != NULL)) {
 233                 /* utf image is already downloaded, it shouldn't be */
 234                 ret = -EEXIST;
 235                 goto err;
 236         }
 237
 238         ret = ath10k_tm_fetch_firmware(ar);
 239         if (ret) {
 240                 ath10k_err(ar, "failed to fetch UTF firmware: %d", ret);
 241                 goto err;
 242         }
 243
 244         if (ar->testmode.utf_mode_fw.fw_file.codeswap_data &&
 245             ar->testmode.utf_mode_fw.fw_file.codeswap_len) {
 246                 ret = ath10k_swap_code_seg_init(ar,
 247                                                 &ar->testmode.utf_mode_fw.fw_file);
 248                 if (ret) {
 249                         ath10k_warn(ar,
 250                                     "failed to init utf code swap segment: %d\n",
 251                                     ret);
 252                         goto err_release_utf_mode_fw;
 253                 }
 254         }
 255
 256         spin_lock_bh(&ar->data_lock);
 257         ar->testmode.utf_monitor = true;
 258         spin_unlock_bh(&ar->data_lock);
 259
 260         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode wmi version %d\n",
 261                    ar->testmode.utf_mode_fw.fw_file.wmi_op_version);
 262
 263         ret = ath10k_hif_power_up(ar);
 264         if (ret) {
 265                 ath10k_err(ar, "failed to power up hif (testmode): %d\n", ret);
 266                 ar->state = ATH10K_STATE_OFF;
 267                 goto err_release_utf_mode_fw;
 268         }
 269
 270         ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_UTF,
 271                                 &ar->testmode.utf_mode_fw);
 272         if (ret) {
 273                 ath10k_err(ar, "failed to start core (testmode): %d\n", ret);
 274                 ar->state = ATH10K_STATE_OFF;
 275                 goto err_power_down;
 276         }
 277
 278         ar->state = ATH10K_STATE_UTF;
 279
 280         if (strlen(ar->testmode.utf_mode_fw.fw_file.fw_version) > 0)
 281                 ver = ar->testmode.utf_mode_fw.fw_file.fw_version;
 282         else
 283                 ver = "API 1";
 284
 285         ath10k_info(ar, "UTF firmware %s started\n", ver);
 286
 287         mutex_unlock(&ar->conf_mutex);
 288
 289         return 0;
 290
 291 err_power_down:
 292         ath10k_hif_power_down(ar);
 293
 294 err_release_utf_mode_fw:
 295         if (ar->testmode.utf_mode_fw.fw_file.codeswap_data &&
 296             ar->testmode.utf_mode_fw.fw_file.codeswap_len)
 297                 ath10k_swap_code_seg_release(ar,
 298                                              &ar->testmode.utf_mode_fw.fw_file);
 299
 300         release_firmware(ar->testmode.utf_mode_fw.fw_file.firmware);
 301         ar->testmode.utf_mode_fw.fw_file.firmware = NULL;
 302
 303 err:
 304         mutex_unlock(&ar->conf_mutex);
 305
 306         return ret;
 307 }
 308
 309 static void __ath10k_tm_cmd_utf_stop(struct ath10k *ar)
 310 {
 311         lockdep_assert_held(&ar->conf_mutex);
 312
 313         ath10k_core_stop(ar);
 314         ath10k_hif_power_down(ar);
 315
 316         spin_lock_bh(&ar->data_lock);
 317
 318         ar->testmode.utf_monitor = false;
 319
 320         spin_unlock_bh(&ar->data_lock);
 321
 322         if (ar->testmode.utf_mode_fw.fw_file.codeswap_data &&
 323             ar->testmode.utf_mode_fw.fw_file.codeswap_len)
 324                 ath10k_swap_code_seg_release(ar,
 325                                              &ar->testmode.utf_mode_fw.fw_file);
 326
 327         release_firmware(ar->testmode.utf_mode_fw.fw_file.firmware);
 328         ar->testmode.utf_mode_fw.fw_file.firmware = NULL;
 329
 330         ar->state = ATH10K_STATE_OFF;
 331 }
 332
 333 static int ath10k_tm_cmd_utf_stop(struct ath10k *ar, struct nlattr *tb[])
 334 {
 335         int ret;
 336
 337         ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf stop\n");
 338
 339         mutex_lock(&ar->conf_mutex);
 340
 341         if (ar->state != ATH10K_STATE_UTF) {
 342                 ret = -ENETDOWN;
 343                 goto out;
 344         }
 345
 346         __ath10k_tm_cmd_utf_stop(ar);
 347
 348         ret = 0;
 349
 350         ath10k_info(ar, "UTF firmware stopped\n");
 351
 352 out:
 353         mutex_unlock(&ar->conf_mutex);
 354         return ret;
 355 }
 356
 357 static int ath10k_tm_cmd_wmi(struct ath10k *ar, struct nlattr *tb[])
 358 {
 359         struct sk_buff *skb;
 360         int ret, buf_len;
 361         u32 cmd_id;
 362         void *buf;
 363
 364         mutex_lock(&ar->conf_mutex);
 365
 366         if (ar->state != ATH10K_STATE_UTF) {
 367                 ret = -ENETDOWN;
 368                 goto out;
 369         }
 370
 371         if (!tb[ATH10K_TM_ATTR_DATA]) {
 372                 ret = -EINVAL;
 373                 goto out;
 374         }
 375
 376         if (!tb[ATH10K_TM_ATTR_WMI_CMDID]) {
 377                 ret = -EINVAL;
 378                 goto out;
 379         }
 380
 381         buf = nla_data(tb[ATH10K_TM_ATTR_DATA]);
 382         buf_len = nla_len(tb[ATH10K_TM_ATTR_DATA]);
 383         cmd_id = nla_get_u32(tb[ATH10K_TM_ATTR_WMI_CMDID]);
 384
 385         ath10k_dbg(ar, ATH10K_DBG_TESTMODE,
 386                    "testmode cmd wmi cmd_id %d buf %pK buf_len %d\n",
 387                    cmd_id, buf, buf_len);
 388
 389         ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", buf, buf_len);
 390
 391         skb = ath10k_wmi_alloc_skb(ar, buf_len);
 392         if (!skb) {
 393                 ret = -ENOMEM;
 394                 goto out;
 395         }
 396
 397         memcpy(skb->data, buf, buf_len);
 398
 399         ret = ath10k_wmi_cmd_send(ar, skb, cmd_id);
 400         if (ret) {
 401                 ath10k_warn(ar, "failed to transmit wmi command (testmode): %d\n",
 402                             ret);
 403                 goto out;
 404         }
 405
 406         ret = 0;
 407
 408 out:
 409         mutex_unlock(&ar->conf_mutex);
 410         return ret;
 411 }
 412
 413 int ath10k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 414                   void *data, int len)
 415 {
 416         struct ath10k *ar = hw->priv;
 417         struct nlattr *tb[ATH10K_TM_ATTR_MAX + 1];
 418         int ret;
 419
 420         ret = nla_parse(tb, ATH10K_TM_ATTR_MAX, data, len,
 421                         ath10k_tm_policy);
 422         if (ret)
 423                 return ret;
 424
 425         if (!tb[ATH10K_TM_ATTR_CMD])
 426                 return -EINVAL;
 427
 428         switch (nla_get_u32(tb[ATH10K_TM_ATTR_CMD])) {
 429         case ATH10K_TM_CMD_GET_VERSION:
 430                 return ath10k_tm_cmd_get_version(ar, tb);
 431         case ATH10K_TM_CMD_UTF_START:
 432                 return ath10k_tm_cmd_utf_start(ar, tb);
 433         case ATH10K_TM_CMD_UTF_STOP:
 434                 return ath10k_tm_cmd_utf_stop(ar, tb);
 435         case ATH10K_TM_CMD_WMI:
 436                 return ath10k_tm_cmd_wmi(ar, tb);
 437         default:
 438                 return -EOPNOTSUPP;
 439         }
 440 }
 441
 442 void ath10k_testmode_destroy(struct ath10k *ar)
 443 {
 444         mutex_lock(&ar->conf_mutex);
 445
 446         if (ar->state != ATH10K_STATE_UTF) {
 447                 /* utf firmware is not running, nothing to do */
 448                 goto out;
 449         }
 450
 451         __ath10k_tm_cmd_utf_stop(ar);
 452
 453 out:
 454         mutex_unlock(&ar->conf_mutex);
 455 }