1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * NXP Wireless LAN device driver: utility functions 4 * 5 * Copyright 2011-2020 NXP 6 */ 7 8 #include "decl.h" 9 #include "ioctl.h" 10 #include "util.h" 11 #include "fw.h" 12 #include "main.h" 13 #include "wmm.h" 14 #include "11n.h" 15 16 static struct mwifiex_debug_data items[] = { 17 {"debug_mask", item_size(debug_mask), 18 item_addr(debug_mask), 1}, 19 {"int_counter", item_size(int_counter), 20 item_addr(int_counter), 1}, 21 {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]), 22 item_addr(packets_out[WMM_AC_VO]), 1}, 23 {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]), 24 item_addr(packets_out[WMM_AC_VI]), 1}, 25 {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]), 26 item_addr(packets_out[WMM_AC_BE]), 1}, 27 {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]), 28 item_addr(packets_out[WMM_AC_BK]), 1}, 29 {"tx_buf_size", item_size(tx_buf_size), 30 item_addr(tx_buf_size), 1}, 31 {"curr_tx_buf_size", item_size(curr_tx_buf_size), 32 item_addr(curr_tx_buf_size), 1}, 33 {"ps_mode", item_size(ps_mode), 34 item_addr(ps_mode), 1}, 35 {"ps_state", item_size(ps_state), 36 item_addr(ps_state), 1}, 37 {"is_deep_sleep", item_size(is_deep_sleep), 38 item_addr(is_deep_sleep), 1}, 39 {"wakeup_dev_req", item_size(pm_wakeup_card_req), 40 item_addr(pm_wakeup_card_req), 1}, 41 {"wakeup_tries", item_size(pm_wakeup_fw_try), 42 item_addr(pm_wakeup_fw_try), 1}, 43 {"hs_configured", item_size(is_hs_configured), 44 item_addr(is_hs_configured), 1}, 45 {"hs_activated", item_size(hs_activated), 46 item_addr(hs_activated), 1}, 47 {"num_tx_timeout", item_size(num_tx_timeout), 48 item_addr(num_tx_timeout), 1}, 49 {"is_cmd_timedout", item_size(is_cmd_timedout), 50 item_addr(is_cmd_timedout), 1}, 51 {"timeout_cmd_id", item_size(timeout_cmd_id), 52 item_addr(timeout_cmd_id), 1}, 53 {"timeout_cmd_act", item_size(timeout_cmd_act), 54 item_addr(timeout_cmd_act), 1}, 55 {"last_cmd_id", item_size(last_cmd_id), 56 item_addr(last_cmd_id), DBG_CMD_NUM}, 57 {"last_cmd_act", item_size(last_cmd_act), 58 item_addr(last_cmd_act), DBG_CMD_NUM}, 59 {"last_cmd_index", item_size(last_cmd_index), 60 item_addr(last_cmd_index), 1}, 61 {"last_cmd_resp_id", item_size(last_cmd_resp_id), 62 item_addr(last_cmd_resp_id), DBG_CMD_NUM}, 63 {"last_cmd_resp_index", item_size(last_cmd_resp_index), 64 item_addr(last_cmd_resp_index), 1}, 65 {"last_event", item_size(last_event), 66 item_addr(last_event), DBG_CMD_NUM}, 67 {"last_event_index", item_size(last_event_index), 68 item_addr(last_event_index), 1}, 69 {"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap), 70 item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM}, 71 {"last_mp_wr_ports", item_size(last_mp_wr_ports), 72 item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM}, 73 {"last_mp_wr_len", item_size(last_mp_wr_len), 74 item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM}, 75 {"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port), 76 item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM}, 77 {"last_sdio_mp_index", item_size(last_sdio_mp_index), 78 item_addr(last_sdio_mp_index), 1}, 79 {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure), 80 item_addr(num_cmd_host_to_card_failure), 1}, 81 {"num_cmd_sleep_cfm_fail", 82 item_size(num_cmd_sleep_cfm_host_to_card_failure), 83 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1}, 84 {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure), 85 item_addr(num_tx_host_to_card_failure), 1}, 86 {"num_evt_deauth", item_size(num_event_deauth), 87 item_addr(num_event_deauth), 1}, 88 {"num_evt_disassoc", item_size(num_event_disassoc), 89 item_addr(num_event_disassoc), 1}, 90 {"num_evt_link_lost", item_size(num_event_link_lost), 91 item_addr(num_event_link_lost), 1}, 92 {"num_cmd_deauth", item_size(num_cmd_deauth), 93 item_addr(num_cmd_deauth), 1}, 94 {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success), 95 item_addr(num_cmd_assoc_success), 1}, 96 {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure), 97 item_addr(num_cmd_assoc_failure), 1}, 98 {"cmd_sent", item_size(cmd_sent), 99 item_addr(cmd_sent), 1}, 100 {"data_sent", item_size(data_sent), 101 item_addr(data_sent), 1}, 102 {"cmd_resp_received", item_size(cmd_resp_received), 103 item_addr(cmd_resp_received), 1}, 104 {"event_received", item_size(event_received), 105 item_addr(event_received), 1}, 106 107 /* variables defined in struct mwifiex_adapter */ 108 {"cmd_pending", adapter_item_size(cmd_pending), 109 adapter_item_addr(cmd_pending), 1}, 110 {"tx_pending", adapter_item_size(tx_pending), 111 adapter_item_addr(tx_pending), 1}, 112 {"rx_pending", adapter_item_size(rx_pending), 113 adapter_item_addr(rx_pending), 1}, 114 }; 115 116 static int num_of_items = ARRAY_SIZE(items); 117 118 /* 119 * Firmware initialization complete callback handler. 120 * 121 * This function wakes up the function waiting on the init 122 * wait queue for the firmware initialization to complete. 123 */ 124 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter) 125 { 126 127 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) 128 if (adapter->if_ops.init_fw_port) 129 adapter->if_ops.init_fw_port(adapter); 130 131 adapter->init_wait_q_woken = true; 132 wake_up_interruptible(&adapter->init_wait_q); 133 return 0; 134 } 135 136 /* 137 * This function sends init/shutdown command 138 * to firmware. 139 */ 140 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv, 141 u32 func_init_shutdown) 142 { 143 u16 cmd; 144 145 if (func_init_shutdown == MWIFIEX_FUNC_INIT) { 146 cmd = HostCmd_CMD_FUNC_INIT; 147 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) { 148 cmd = HostCmd_CMD_FUNC_SHUTDOWN; 149 } else { 150 mwifiex_dbg(priv->adapter, ERROR, 151 "unsupported parameter\n"); 152 return -1; 153 } 154 155 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true); 156 } 157 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw); 158 159 /* 160 * IOCTL request handler to set/get debug information. 161 * 162 * This function collates/sets the information from/to different driver 163 * structures. 164 */ 165 int mwifiex_get_debug_info(struct mwifiex_private *priv, 166 struct mwifiex_debug_info *info) 167 { 168 struct mwifiex_adapter *adapter = priv->adapter; 169 170 if (info) { 171 info->debug_mask = adapter->debug_mask; 172 memcpy(info->packets_out, 173 priv->wmm.packets_out, 174 sizeof(priv->wmm.packets_out)); 175 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size; 176 info->tx_buf_size = (u32) adapter->tx_buf_size; 177 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv, 178 info->rx_tbl); 179 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv, 180 info->tx_tbl); 181 info->tdls_peer_num = mwifiex_get_tdls_list(priv, 182 info->tdls_list); 183 info->ps_mode = adapter->ps_mode; 184 info->ps_state = adapter->ps_state; 185 info->is_deep_sleep = adapter->is_deep_sleep; 186 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req; 187 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try; 188 info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED, 189 &adapter->work_flags); 190 info->hs_activated = adapter->hs_activated; 191 info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT, 192 &adapter->work_flags); 193 info->num_cmd_host_to_card_failure 194 = adapter->dbg.num_cmd_host_to_card_failure; 195 info->num_cmd_sleep_cfm_host_to_card_failure 196 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure; 197 info->num_tx_host_to_card_failure 198 = adapter->dbg.num_tx_host_to_card_failure; 199 info->num_event_deauth = adapter->dbg.num_event_deauth; 200 info->num_event_disassoc = adapter->dbg.num_event_disassoc; 201 info->num_event_link_lost = adapter->dbg.num_event_link_lost; 202 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth; 203 info->num_cmd_assoc_success = 204 adapter->dbg.num_cmd_assoc_success; 205 info->num_cmd_assoc_failure = 206 adapter->dbg.num_cmd_assoc_failure; 207 info->num_tx_timeout = adapter->dbg.num_tx_timeout; 208 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id; 209 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act; 210 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id, 211 sizeof(adapter->dbg.last_cmd_id)); 212 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act, 213 sizeof(adapter->dbg.last_cmd_act)); 214 info->last_cmd_index = adapter->dbg.last_cmd_index; 215 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id, 216 sizeof(adapter->dbg.last_cmd_resp_id)); 217 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index; 218 memcpy(info->last_event, adapter->dbg.last_event, 219 sizeof(adapter->dbg.last_event)); 220 info->last_event_index = adapter->dbg.last_event_index; 221 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap, 222 sizeof(adapter->dbg.last_mp_wr_bitmap)); 223 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports, 224 sizeof(adapter->dbg.last_mp_wr_ports)); 225 memcpy(info->last_mp_curr_wr_port, 226 adapter->dbg.last_mp_curr_wr_port, 227 sizeof(adapter->dbg.last_mp_curr_wr_port)); 228 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len, 229 sizeof(adapter->dbg.last_mp_wr_len)); 230 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index; 231 info->data_sent = adapter->data_sent; 232 info->cmd_sent = adapter->cmd_sent; 233 info->cmd_resp_received = adapter->cmd_resp_received; 234 } 235 236 return 0; 237 } 238 239 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf, 240 struct mwifiex_debug_info *info) 241 { 242 char *p = buf; 243 struct mwifiex_debug_data *d = &items[0]; 244 size_t size, addr; 245 long val; 246 int i, j; 247 248 if (!info) 249 return 0; 250 251 for (i = 0; i < num_of_items; i++) { 252 p += sprintf(p, "%s=", d[i].name); 253 254 size = d[i].size / d[i].num; 255 256 if (i < (num_of_items - 3)) 257 addr = d[i].addr + (size_t)info; 258 else /* The last 3 items are struct mwifiex_adapter variables */ 259 addr = d[i].addr + (size_t)priv->adapter; 260 261 for (j = 0; j < d[i].num; j++) { 262 switch (size) { 263 case 1: 264 val = *((u8 *)addr); 265 break; 266 case 2: 267 val = get_unaligned((u16 *)addr); 268 break; 269 case 4: 270 val = get_unaligned((u32 *)addr); 271 break; 272 case 8: 273 val = get_unaligned((long long *)addr); 274 break; 275 default: 276 val = -1; 277 break; 278 } 279 280 p += sprintf(p, "%#lx ", val); 281 addr += size; 282 } 283 284 p += sprintf(p, "\n"); 285 } 286 287 if (info->tx_tbl_num) { 288 p += sprintf(p, "Tx BA stream table:\n"); 289 for (i = 0; i < info->tx_tbl_num; i++) 290 p += sprintf(p, "tid = %d, ra = %pM\n", 291 info->tx_tbl[i].tid, info->tx_tbl[i].ra); 292 } 293 294 if (info->rx_tbl_num) { 295 p += sprintf(p, "Rx reorder table:\n"); 296 for (i = 0; i < info->rx_tbl_num; i++) { 297 p += sprintf(p, "tid = %d, ta = %pM, ", 298 info->rx_tbl[i].tid, 299 info->rx_tbl[i].ta); 300 p += sprintf(p, "start_win = %d, ", 301 info->rx_tbl[i].start_win); 302 p += sprintf(p, "win_size = %d, buffer: ", 303 info->rx_tbl[i].win_size); 304 305 for (j = 0; j < info->rx_tbl[i].win_size; j++) 306 p += sprintf(p, "%c ", 307 info->rx_tbl[i].buffer[j] ? 308 '1' : '0'); 309 310 p += sprintf(p, "\n"); 311 } 312 } 313 314 if (info->tdls_peer_num) { 315 p += sprintf(p, "TDLS peer table:\n"); 316 for (i = 0; i < info->tdls_peer_num; i++) { 317 p += sprintf(p, "peer = %pM", 318 info->tdls_list[i].peer_addr); 319 p += sprintf(p, "\n"); 320 } 321 } 322 323 return p - buf; 324 } 325 326 static int 327 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len, 328 struct rxpd *rx_pd) 329 { 330 u16 stype; 331 u8 category, action_code, *addr2; 332 struct ieee80211_hdr *ieee_hdr = (void *)payload; 333 334 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE); 335 336 switch (stype) { 337 case IEEE80211_STYPE_ACTION: 338 category = *(payload + sizeof(struct ieee80211_hdr)); 339 switch (category) { 340 case WLAN_CATEGORY_PUBLIC: 341 action_code = *(payload + sizeof(struct ieee80211_hdr) 342 + 1); 343 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { 344 addr2 = ieee_hdr->addr2; 345 mwifiex_dbg(priv->adapter, INFO, 346 "TDLS discovery response %pM nf=%d, snr=%d\n", 347 addr2, rx_pd->nf, rx_pd->snr); 348 mwifiex_auto_tdls_update_peer_signal(priv, 349 addr2, 350 rx_pd->snr, 351 rx_pd->nf); 352 } 353 break; 354 case WLAN_CATEGORY_BACK: 355 /*we dont indicate BACK action frames to cfg80211*/ 356 mwifiex_dbg(priv->adapter, INFO, 357 "drop BACK action frames"); 358 return -1; 359 default: 360 mwifiex_dbg(priv->adapter, INFO, 361 "unknown public action frame category %d\n", 362 category); 363 } 364 break; 365 default: 366 mwifiex_dbg(priv->adapter, INFO, 367 "unknown mgmt frame subtype %#x\n", stype); 368 return 0; 369 } 370 371 return 0; 372 } 373 /* 374 * This function processes the received management packet and send it 375 * to the kernel. 376 */ 377 int 378 mwifiex_process_mgmt_packet(struct mwifiex_private *priv, 379 struct sk_buff *skb) 380 { 381 struct rxpd *rx_pd; 382 u16 pkt_len; 383 struct ieee80211_hdr *ieee_hdr; 384 385 if (!skb) 386 return -1; 387 388 if (!priv->mgmt_frame_mask || 389 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) { 390 mwifiex_dbg(priv->adapter, ERROR, 391 "do not receive mgmt frames on uninitialized intf"); 392 return -1; 393 } 394 395 rx_pd = (struct rxpd *)skb->data; 396 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length); 397 if (pkt_len < sizeof(struct ieee80211_hdr) + sizeof(pkt_len)) { 398 mwifiex_dbg(priv->adapter, ERROR, "invalid rx_pkt_length"); 399 return -1; 400 } 401 402 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset)); 403 skb_pull(skb, sizeof(pkt_len)); 404 pkt_len -= sizeof(pkt_len); 405 406 ieee_hdr = (void *)skb->data; 407 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) { 408 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr, 409 pkt_len, rx_pd)) 410 return -1; 411 } 412 /* Remove address4 */ 413 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr), 414 skb->data + sizeof(struct ieee80211_hdr), 415 pkt_len - sizeof(struct ieee80211_hdr)); 416 417 pkt_len -= ETH_ALEN; 418 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len); 419 420 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq, 421 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len, 422 0); 423 424 return 0; 425 } 426 427 /* 428 * This function processes the received packet before sending it to the 429 * kernel. 430 * 431 * It extracts the SKB from the received buffer and sends it to kernel. 432 * In case the received buffer does not contain the data in SKB format, 433 * the function creates a blank SKB, fills it with the data from the 434 * received buffer and then sends this new SKB to the kernel. 435 */ 436 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb) 437 { 438 struct mwifiex_sta_node *src_node; 439 struct ethhdr *p_ethhdr; 440 441 if (!skb) 442 return -1; 443 444 priv->stats.rx_bytes += skb->len; 445 priv->stats.rx_packets++; 446 447 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { 448 p_ethhdr = (void *)skb->data; 449 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source); 450 if (src_node) { 451 src_node->stats.last_rx = jiffies; 452 src_node->stats.rx_bytes += skb->len; 453 src_node->stats.rx_packets++; 454 } 455 } 456 457 skb->dev = priv->netdev; 458 skb->protocol = eth_type_trans(skb, priv->netdev); 459 skb->ip_summed = CHECKSUM_NONE; 460 461 /* This is required only in case of 11n and USB/PCIE as we alloc 462 * a buffer of 4K only if its 11N (to be able to receive 4K 463 * AMSDU packets). In case of SD we allocate buffers based 464 * on the size of packet and hence this is not needed. 465 * 466 * Modifying the truesize here as our allocation for each 467 * skb is 4K but we only receive 2K packets and this cause 468 * the kernel to start dropping packets in case where 469 * application has allocated buffer based on 2K size i.e. 470 * if there a 64K packet received (in IP fragments and 471 * application allocates 64K to receive this packet but 472 * this packet would almost double up because we allocate 473 * each 1.5K fragment in 4K and pass it up. As soon as the 474 * 64K limit hits kernel will start to drop rest of the 475 * fragments. Currently we fail the Filesndl-ht.scr script 476 * for UDP, hence this fix 477 */ 478 if ((priv->adapter->iface_type == MWIFIEX_USB || 479 priv->adapter->iface_type == MWIFIEX_PCIE) && 480 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)) 481 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE); 482 483 netif_rx(skb); 484 return 0; 485 } 486 487 /* 488 * IOCTL completion callback handler. 489 * 490 * This function is called when a pending IOCTL is completed. 491 * 492 * If work queue support is enabled, the function wakes up the 493 * corresponding waiting function. Otherwise, it processes the 494 * IOCTL response and frees the response buffer. 495 */ 496 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter, 497 struct cmd_ctrl_node *cmd_node) 498 { 499 WARN_ON(!cmd_node->wait_q_enabled); 500 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n", 501 adapter->cmd_wait_q.status); 502 503 *cmd_node->condition = true; 504 wake_up_interruptible(&adapter->cmd_wait_q.wait); 505 506 return 0; 507 } 508 509 /* This function will return the pointer to station entry in station list 510 * table which matches specified mac address. 511 * This function should be called after acquiring RA list spinlock. 512 * NULL is returned if station entry is not found in associated STA list. 513 */ 514 struct mwifiex_sta_node * 515 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac) 516 { 517 struct mwifiex_sta_node *node; 518 519 if (!mac) 520 return NULL; 521 522 list_for_each_entry(node, &priv->sta_list, list) { 523 if (!memcmp(node->mac_addr, mac, ETH_ALEN)) 524 return node; 525 } 526 527 return NULL; 528 } 529 530 static struct mwifiex_sta_node * 531 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status) 532 { 533 struct mwifiex_sta_node *node; 534 535 list_for_each_entry(node, &priv->sta_list, list) { 536 if (node->tdls_status == status) 537 return node; 538 } 539 540 return NULL; 541 } 542 543 /* If tdls channel switching is on-going, tx data traffic should be 544 * blocked until the switching stage completed. 545 */ 546 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv) 547 { 548 struct mwifiex_sta_node *sta_ptr; 549 550 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 551 return false; 552 553 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING); 554 if (sta_ptr) 555 return true; 556 557 return false; 558 } 559 560 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv) 561 { 562 struct mwifiex_sta_node *sta_ptr; 563 564 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 565 return false; 566 567 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN); 568 if (sta_ptr) 569 return true; 570 571 return false; 572 } 573 574 /* If tdls channel switching is on-going or tdls operate on off-channel, 575 * cmd path should be blocked until tdls switched to base-channel. 576 */ 577 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv) 578 { 579 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 580 return true; 581 582 if (mwifiex_is_tdls_chan_switching(priv) || 583 mwifiex_is_tdls_off_chan(priv)) 584 return false; 585 586 return true; 587 } 588 589 /* This function will add a sta_node entry to associated station list 590 * table with the given mac address. 591 * If entry exist already, existing entry is returned. 592 * If received mac address is NULL, NULL is returned. 593 */ 594 struct mwifiex_sta_node * 595 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac) 596 { 597 struct mwifiex_sta_node *node; 598 599 if (!mac) 600 return NULL; 601 602 spin_lock_bh(&priv->sta_list_spinlock); 603 node = mwifiex_get_sta_entry(priv, mac); 604 if (node) 605 goto done; 606 607 node = kzalloc(sizeof(*node), GFP_ATOMIC); 608 if (!node) 609 goto done; 610 611 memcpy(node->mac_addr, mac, ETH_ALEN); 612 list_add_tail(&node->list, &priv->sta_list); 613 614 done: 615 spin_unlock_bh(&priv->sta_list_spinlock); 616 return node; 617 } 618 619 /* This function will search for HT IE in association request IEs 620 * and set station HT parameters accordingly. 621 */ 622 void 623 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies, 624 int ies_len, struct mwifiex_sta_node *node) 625 { 626 struct ieee_types_header *ht_cap_ie; 627 const struct ieee80211_ht_cap *ht_cap; 628 629 if (!ies) 630 return; 631 632 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, 633 ies_len); 634 if (ht_cap_ie) { 635 ht_cap = (void *)(ht_cap_ie + 1); 636 node->is_11n_enabled = 1; 637 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) & 638 IEEE80211_HT_CAP_MAX_AMSDU ? 639 MWIFIEX_TX_DATA_BUF_SIZE_8K : 640 MWIFIEX_TX_DATA_BUF_SIZE_4K; 641 } else { 642 node->is_11n_enabled = 0; 643 } 644 645 return; 646 } 647 648 /* This function will delete a station entry from station list */ 649 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac) 650 { 651 struct mwifiex_sta_node *node; 652 653 spin_lock_bh(&priv->sta_list_spinlock); 654 655 node = mwifiex_get_sta_entry(priv, mac); 656 if (node) { 657 list_del(&node->list); 658 kfree(node); 659 } 660 661 spin_unlock_bh(&priv->sta_list_spinlock); 662 return; 663 } 664 665 /* This function will delete all stations from associated station list. */ 666 void mwifiex_del_all_sta_list(struct mwifiex_private *priv) 667 { 668 struct mwifiex_sta_node *node, *tmp; 669 670 spin_lock_bh(&priv->sta_list_spinlock); 671 672 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) { 673 list_del(&node->list); 674 kfree(node); 675 } 676 677 INIT_LIST_HEAD(&priv->sta_list); 678 spin_unlock_bh(&priv->sta_list_spinlock); 679 return; 680 } 681 682 /* This function adds histogram data to histogram array*/ 683 void mwifiex_hist_data_add(struct mwifiex_private *priv, 684 u8 rx_rate, s8 snr, s8 nflr) 685 { 686 struct mwifiex_histogram_data *phist_data = priv->hist_data; 687 688 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES) 689 mwifiex_hist_data_reset(priv); 690 mwifiex_hist_data_set(priv, rx_rate, snr, nflr); 691 } 692 693 /* function to add histogram record */ 694 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr, 695 s8 nflr) 696 { 697 struct mwifiex_histogram_data *phist_data = priv->hist_data; 698 s8 nf = -nflr; 699 s8 rssi = snr - nflr; 700 701 atomic_inc(&phist_data->num_samples); 702 atomic_inc(&phist_data->rx_rate[rx_rate]); 703 atomic_inc(&phist_data->snr[snr + 128]); 704 atomic_inc(&phist_data->noise_flr[nf + 128]); 705 atomic_inc(&phist_data->sig_str[rssi + 128]); 706 } 707 708 /* function to reset histogram data during init/reset */ 709 void mwifiex_hist_data_reset(struct mwifiex_private *priv) 710 { 711 int ix; 712 struct mwifiex_histogram_data *phist_data = priv->hist_data; 713 714 atomic_set(&phist_data->num_samples, 0); 715 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++) 716 atomic_set(&phist_data->rx_rate[ix], 0); 717 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++) 718 atomic_set(&phist_data->snr[ix], 0); 719 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++) 720 atomic_set(&phist_data->noise_flr[ix], 0); 721 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) 722 atomic_set(&phist_data->sig_str[ix], 0); 723 } 724 725 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags) 726 { 727 struct sk_buff *skb; 728 int buf_len, pad; 729 730 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; 731 732 skb = __dev_alloc_skb(buf_len, flags); 733 734 if (!skb) 735 return NULL; 736 737 skb_reserve(skb, MWIFIEX_RX_HEADROOM); 738 739 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - 740 (long)skb->data; 741 742 skb_reserve(skb, pad); 743 744 return skb; 745 } 746 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf); 747 748 void mwifiex_fw_dump_event(struct mwifiex_private *priv) 749 { 750 mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET, 751 0, NULL, true); 752 } 753 EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event); 754