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_cmd_utf_start(struct ath10k *ar, struct nlattr *tb[]) 143 { 144 char filename[100]; 145 int ret; 146 147 ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf start\n"); 148 149 mutex_lock(&ar->conf_mutex); 150 151 if (ar->state == ATH10K_STATE_UTF) { 152 ret = -EALREADY; 153 goto err; 154 } 155 156 /* start utf only when the driver is not in use */ 157 if (ar->state != ATH10K_STATE_OFF) { 158 ret = -EBUSY; 159 goto err; 160 } 161 162 if (WARN_ON(ar->testmode.utf != NULL)) { 163 /* utf image is already downloaded, it shouldn't be */ 164 ret = -EEXIST; 165 goto err; 166 } 167 168 snprintf(filename, sizeof(filename), "%s/%s", 169 ar->hw_params.fw.dir, ATH10K_FW_UTF_FILE); 170 171 /* load utf firmware image */ 172 ret = request_firmware(&ar->testmode.utf, filename, ar->dev); 173 if (ret) { 174 ath10k_warn(ar, "failed to retrieve utf firmware '%s': %d\n", 175 filename, ret); 176 goto err; 177 } 178 179 spin_lock_bh(&ar->data_lock); 180 181 ar->testmode.utf_monitor = true; 182 183 spin_unlock_bh(&ar->data_lock); 184 185 BUILD_BUG_ON(sizeof(ar->fw_features) != 186 sizeof(ar->testmode.orig_fw_features)); 187 188 memcpy(ar->testmode.orig_fw_features, ar->fw_features, 189 sizeof(ar->fw_features)); 190 ar->testmode.orig_wmi_op_version = ar->wmi.op_version; 191 192 /* utf.bin firmware image does not advertise firmware features. Do 193 * an ugly hack where we force the firmware features so that wmi.c 194 * will use the correct WMI interface. 195 */ 196 memset(ar->fw_features, 0, sizeof(ar->fw_features)); 197 ar->wmi.op_version = ATH10K_FW_WMI_OP_VERSION_10_1; 198 199 ret = ath10k_hif_power_up(ar); 200 if (ret) { 201 ath10k_err(ar, "failed to power up hif (testmode): %d\n", ret); 202 ar->state = ATH10K_STATE_OFF; 203 goto err_fw_features; 204 } 205 206 ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_UTF); 207 if (ret) { 208 ath10k_err(ar, "failed to start core (testmode): %d\n", ret); 209 ar->state = ATH10K_STATE_OFF; 210 goto err_power_down; 211 } 212 213 ar->state = ATH10K_STATE_UTF; 214 215 ath10k_info(ar, "UTF firmware started\n"); 216 217 mutex_unlock(&ar->conf_mutex); 218 219 return 0; 220 221 err_power_down: 222 ath10k_hif_power_down(ar); 223 224 err_fw_features: 225 /* return the original firmware features */ 226 memcpy(ar->fw_features, ar->testmode.orig_fw_features, 227 sizeof(ar->fw_features)); 228 ar->wmi.op_version = ar->testmode.orig_wmi_op_version; 229 230 release_firmware(ar->testmode.utf); 231 ar->testmode.utf = NULL; 232 233 err: 234 mutex_unlock(&ar->conf_mutex); 235 236 return ret; 237 } 238 239 static void __ath10k_tm_cmd_utf_stop(struct ath10k *ar) 240 { 241 lockdep_assert_held(&ar->conf_mutex); 242 243 ath10k_core_stop(ar); 244 ath10k_hif_power_down(ar); 245 246 spin_lock_bh(&ar->data_lock); 247 248 ar->testmode.utf_monitor = false; 249 250 spin_unlock_bh(&ar->data_lock); 251 252 /* return the original firmware features */ 253 memcpy(ar->fw_features, ar->testmode.orig_fw_features, 254 sizeof(ar->fw_features)); 255 ar->wmi.op_version = ar->testmode.orig_wmi_op_version; 256 257 release_firmware(ar->testmode.utf); 258 ar->testmode.utf = NULL; 259 260 ar->state = ATH10K_STATE_OFF; 261 } 262 263 static int ath10k_tm_cmd_utf_stop(struct ath10k *ar, struct nlattr *tb[]) 264 { 265 int ret; 266 267 ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode cmd utf stop\n"); 268 269 mutex_lock(&ar->conf_mutex); 270 271 if (ar->state != ATH10K_STATE_UTF) { 272 ret = -ENETDOWN; 273 goto out; 274 } 275 276 __ath10k_tm_cmd_utf_stop(ar); 277 278 ret = 0; 279 280 ath10k_info(ar, "UTF firmware stopped\n"); 281 282 out: 283 mutex_unlock(&ar->conf_mutex); 284 return ret; 285 } 286 287 static int ath10k_tm_cmd_wmi(struct ath10k *ar, struct nlattr *tb[]) 288 { 289 struct sk_buff *skb; 290 int ret, buf_len; 291 u32 cmd_id; 292 void *buf; 293 294 mutex_lock(&ar->conf_mutex); 295 296 if (ar->state != ATH10K_STATE_UTF) { 297 ret = -ENETDOWN; 298 goto out; 299 } 300 301 if (!tb[ATH10K_TM_ATTR_DATA]) { 302 ret = -EINVAL; 303 goto out; 304 } 305 306 if (!tb[ATH10K_TM_ATTR_WMI_CMDID]) { 307 ret = -EINVAL; 308 goto out; 309 } 310 311 buf = nla_data(tb[ATH10K_TM_ATTR_DATA]); 312 buf_len = nla_len(tb[ATH10K_TM_ATTR_DATA]); 313 cmd_id = nla_get_u32(tb[ATH10K_TM_ATTR_WMI_CMDID]); 314 315 ath10k_dbg(ar, ATH10K_DBG_TESTMODE, 316 "testmode cmd wmi cmd_id %d buf %p buf_len %d\n", 317 cmd_id, buf, buf_len); 318 319 ath10k_dbg_dump(ar, ATH10K_DBG_TESTMODE, NULL, "", buf, buf_len); 320 321 skb = ath10k_wmi_alloc_skb(ar, buf_len); 322 if (!skb) { 323 ret = -ENOMEM; 324 goto out; 325 } 326 327 memcpy(skb->data, buf, buf_len); 328 329 ret = ath10k_wmi_cmd_send(ar, skb, cmd_id); 330 if (ret) { 331 ath10k_warn(ar, "failed to transmit wmi command (testmode): %d\n", 332 ret); 333 goto out; 334 } 335 336 ret = 0; 337 338 out: 339 mutex_unlock(&ar->conf_mutex); 340 return ret; 341 } 342 343 int ath10k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 344 void *data, int len) 345 { 346 struct ath10k *ar = hw->priv; 347 struct nlattr *tb[ATH10K_TM_ATTR_MAX + 1]; 348 int ret; 349 350 ret = nla_parse(tb, ATH10K_TM_ATTR_MAX, data, len, 351 ath10k_tm_policy); 352 if (ret) 353 return ret; 354 355 if (!tb[ATH10K_TM_ATTR_CMD]) 356 return -EINVAL; 357 358 switch (nla_get_u32(tb[ATH10K_TM_ATTR_CMD])) { 359 case ATH10K_TM_CMD_GET_VERSION: 360 return ath10k_tm_cmd_get_version(ar, tb); 361 case ATH10K_TM_CMD_UTF_START: 362 return ath10k_tm_cmd_utf_start(ar, tb); 363 case ATH10K_TM_CMD_UTF_STOP: 364 return ath10k_tm_cmd_utf_stop(ar, tb); 365 case ATH10K_TM_CMD_WMI: 366 return ath10k_tm_cmd_wmi(ar, tb); 367 default: 368 return -EOPNOTSUPP; 369 } 370 } 371 372 void ath10k_testmode_destroy(struct ath10k *ar) 373 { 374 mutex_lock(&ar->conf_mutex); 375 376 if (ar->state != ATH10K_STATE_UTF) { 377 /* utf firmware is not running, nothing to do */ 378 goto out; 379 } 380 381 __ath10k_tm_cmd_utf_stop(ar); 382 383 out: 384 mutex_unlock(&ar->conf_mutex); 385 } 386