1 /* 2 * Marvell Wireless LAN device driver: utility functions 3 * 4 * Copyright (C) 2011-2014, 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 "decl.h" 21 #include "ioctl.h" 22 #include "util.h" 23 #include "fw.h" 24 #include "main.h" 25 #include "wmm.h" 26 #include "11n.h" 27 28 static struct mwifiex_debug_data items[] = { 29 {"debug_mask", item_size(debug_mask), 30 item_addr(debug_mask), 1}, 31 {"int_counter", item_size(int_counter), 32 item_addr(int_counter), 1}, 33 {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]), 34 item_addr(packets_out[WMM_AC_VO]), 1}, 35 {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]), 36 item_addr(packets_out[WMM_AC_VI]), 1}, 37 {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]), 38 item_addr(packets_out[WMM_AC_BE]), 1}, 39 {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]), 40 item_addr(packets_out[WMM_AC_BK]), 1}, 41 {"tx_buf_size", item_size(tx_buf_size), 42 item_addr(tx_buf_size), 1}, 43 {"curr_tx_buf_size", item_size(curr_tx_buf_size), 44 item_addr(curr_tx_buf_size), 1}, 45 {"ps_mode", item_size(ps_mode), 46 item_addr(ps_mode), 1}, 47 {"ps_state", item_size(ps_state), 48 item_addr(ps_state), 1}, 49 {"is_deep_sleep", item_size(is_deep_sleep), 50 item_addr(is_deep_sleep), 1}, 51 {"wakeup_dev_req", item_size(pm_wakeup_card_req), 52 item_addr(pm_wakeup_card_req), 1}, 53 {"wakeup_tries", item_size(pm_wakeup_fw_try), 54 item_addr(pm_wakeup_fw_try), 1}, 55 {"hs_configured", item_size(is_hs_configured), 56 item_addr(is_hs_configured), 1}, 57 {"hs_activated", item_size(hs_activated), 58 item_addr(hs_activated), 1}, 59 {"num_tx_timeout", item_size(num_tx_timeout), 60 item_addr(num_tx_timeout), 1}, 61 {"is_cmd_timedout", item_size(is_cmd_timedout), 62 item_addr(is_cmd_timedout), 1}, 63 {"timeout_cmd_id", item_size(timeout_cmd_id), 64 item_addr(timeout_cmd_id), 1}, 65 {"timeout_cmd_act", item_size(timeout_cmd_act), 66 item_addr(timeout_cmd_act), 1}, 67 {"last_cmd_id", item_size(last_cmd_id), 68 item_addr(last_cmd_id), DBG_CMD_NUM}, 69 {"last_cmd_act", item_size(last_cmd_act), 70 item_addr(last_cmd_act), DBG_CMD_NUM}, 71 {"last_cmd_index", item_size(last_cmd_index), 72 item_addr(last_cmd_index), 1}, 73 {"last_cmd_resp_id", item_size(last_cmd_resp_id), 74 item_addr(last_cmd_resp_id), DBG_CMD_NUM}, 75 {"last_cmd_resp_index", item_size(last_cmd_resp_index), 76 item_addr(last_cmd_resp_index), 1}, 77 {"last_event", item_size(last_event), 78 item_addr(last_event), DBG_CMD_NUM}, 79 {"last_event_index", item_size(last_event_index), 80 item_addr(last_event_index), 1}, 81 {"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap), 82 item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM}, 83 {"last_mp_wr_ports", item_size(last_mp_wr_ports), 84 item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM}, 85 {"last_mp_wr_len", item_size(last_mp_wr_len), 86 item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM}, 87 {"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port), 88 item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM}, 89 {"last_sdio_mp_index", item_size(last_sdio_mp_index), 90 item_addr(last_sdio_mp_index), 1}, 91 {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure), 92 item_addr(num_cmd_host_to_card_failure), 1}, 93 {"num_cmd_sleep_cfm_fail", 94 item_size(num_cmd_sleep_cfm_host_to_card_failure), 95 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1}, 96 {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure), 97 item_addr(num_tx_host_to_card_failure), 1}, 98 {"num_evt_deauth", item_size(num_event_deauth), 99 item_addr(num_event_deauth), 1}, 100 {"num_evt_disassoc", item_size(num_event_disassoc), 101 item_addr(num_event_disassoc), 1}, 102 {"num_evt_link_lost", item_size(num_event_link_lost), 103 item_addr(num_event_link_lost), 1}, 104 {"num_cmd_deauth", item_size(num_cmd_deauth), 105 item_addr(num_cmd_deauth), 1}, 106 {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success), 107 item_addr(num_cmd_assoc_success), 1}, 108 {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure), 109 item_addr(num_cmd_assoc_failure), 1}, 110 {"cmd_sent", item_size(cmd_sent), 111 item_addr(cmd_sent), 1}, 112 {"data_sent", item_size(data_sent), 113 item_addr(data_sent), 1}, 114 {"cmd_resp_received", item_size(cmd_resp_received), 115 item_addr(cmd_resp_received), 1}, 116 {"event_received", item_size(event_received), 117 item_addr(event_received), 1}, 118 119 /* variables defined in struct mwifiex_adapter */ 120 {"cmd_pending", adapter_item_size(cmd_pending), 121 adapter_item_addr(cmd_pending), 1}, 122 {"tx_pending", adapter_item_size(tx_pending), 123 adapter_item_addr(tx_pending), 1}, 124 {"rx_pending", adapter_item_size(rx_pending), 125 adapter_item_addr(rx_pending), 1}, 126 }; 127 128 static int num_of_items = ARRAY_SIZE(items); 129 130 /* 131 * Firmware initialization complete callback handler. 132 * 133 * This function wakes up the function waiting on the init 134 * wait queue for the firmware initialization to complete. 135 */ 136 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter) 137 { 138 139 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) 140 if (adapter->if_ops.init_fw_port) 141 adapter->if_ops.init_fw_port(adapter); 142 143 adapter->init_wait_q_woken = true; 144 wake_up_interruptible(&adapter->init_wait_q); 145 return 0; 146 } 147 148 /* 149 * Firmware shutdown complete callback handler. 150 * 151 * This function sets the hardware status to not ready and wakes up 152 * the function waiting on the init wait queue for the firmware 153 * shutdown to complete. 154 */ 155 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter) 156 { 157 adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY; 158 adapter->init_wait_q_woken = true; 159 wake_up_interruptible(&adapter->init_wait_q); 160 return 0; 161 } 162 163 /* 164 * This function sends init/shutdown command 165 * to firmware. 166 */ 167 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv, 168 u32 func_init_shutdown) 169 { 170 u16 cmd; 171 172 if (func_init_shutdown == MWIFIEX_FUNC_INIT) { 173 cmd = HostCmd_CMD_FUNC_INIT; 174 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) { 175 cmd = HostCmd_CMD_FUNC_SHUTDOWN; 176 } else { 177 mwifiex_dbg(priv->adapter, ERROR, 178 "unsupported parameter\n"); 179 return -1; 180 } 181 182 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true); 183 } 184 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw); 185 186 /* 187 * IOCTL request handler to set/get debug information. 188 * 189 * This function collates/sets the information from/to different driver 190 * structures. 191 */ 192 int mwifiex_get_debug_info(struct mwifiex_private *priv, 193 struct mwifiex_debug_info *info) 194 { 195 struct mwifiex_adapter *adapter = priv->adapter; 196 197 if (info) { 198 info->debug_mask = adapter->debug_mask; 199 memcpy(info->packets_out, 200 priv->wmm.packets_out, 201 sizeof(priv->wmm.packets_out)); 202 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size; 203 info->tx_buf_size = (u32) adapter->tx_buf_size; 204 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv, 205 info->rx_tbl); 206 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv, 207 info->tx_tbl); 208 info->tdls_peer_num = mwifiex_get_tdls_list(priv, 209 info->tdls_list); 210 info->ps_mode = adapter->ps_mode; 211 info->ps_state = adapter->ps_state; 212 info->is_deep_sleep = adapter->is_deep_sleep; 213 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req; 214 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try; 215 info->is_hs_configured = adapter->is_hs_configured; 216 info->hs_activated = adapter->hs_activated; 217 info->is_cmd_timedout = adapter->is_cmd_timedout; 218 info->num_cmd_host_to_card_failure 219 = adapter->dbg.num_cmd_host_to_card_failure; 220 info->num_cmd_sleep_cfm_host_to_card_failure 221 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure; 222 info->num_tx_host_to_card_failure 223 = adapter->dbg.num_tx_host_to_card_failure; 224 info->num_event_deauth = adapter->dbg.num_event_deauth; 225 info->num_event_disassoc = adapter->dbg.num_event_disassoc; 226 info->num_event_link_lost = adapter->dbg.num_event_link_lost; 227 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth; 228 info->num_cmd_assoc_success = 229 adapter->dbg.num_cmd_assoc_success; 230 info->num_cmd_assoc_failure = 231 adapter->dbg.num_cmd_assoc_failure; 232 info->num_tx_timeout = adapter->dbg.num_tx_timeout; 233 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id; 234 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act; 235 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id, 236 sizeof(adapter->dbg.last_cmd_id)); 237 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act, 238 sizeof(adapter->dbg.last_cmd_act)); 239 info->last_cmd_index = adapter->dbg.last_cmd_index; 240 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id, 241 sizeof(adapter->dbg.last_cmd_resp_id)); 242 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index; 243 memcpy(info->last_event, adapter->dbg.last_event, 244 sizeof(adapter->dbg.last_event)); 245 info->last_event_index = adapter->dbg.last_event_index; 246 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap, 247 sizeof(adapter->dbg.last_mp_wr_bitmap)); 248 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports, 249 sizeof(adapter->dbg.last_mp_wr_ports)); 250 memcpy(info->last_mp_curr_wr_port, 251 adapter->dbg.last_mp_curr_wr_port, 252 sizeof(adapter->dbg.last_mp_curr_wr_port)); 253 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len, 254 sizeof(adapter->dbg.last_mp_wr_len)); 255 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index; 256 info->data_sent = adapter->data_sent; 257 info->cmd_sent = adapter->cmd_sent; 258 info->cmd_resp_received = adapter->cmd_resp_received; 259 } 260 261 return 0; 262 } 263 264 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf, 265 struct mwifiex_debug_info *info) 266 { 267 char *p = buf; 268 struct mwifiex_debug_data *d = &items[0]; 269 size_t size, addr; 270 long val; 271 int i, j; 272 273 if (!info) 274 return 0; 275 276 for (i = 0; i < num_of_items; i++) { 277 p += sprintf(p, "%s=", d[i].name); 278 279 size = d[i].size / d[i].num; 280 281 if (i < (num_of_items - 3)) 282 addr = d[i].addr + (size_t)info; 283 else /* The last 3 items are struct mwifiex_adapter variables */ 284 addr = d[i].addr + (size_t)priv->adapter; 285 286 for (j = 0; j < d[i].num; j++) { 287 switch (size) { 288 case 1: 289 val = *((u8 *)addr); 290 break; 291 case 2: 292 val = *((u16 *)addr); 293 break; 294 case 4: 295 val = *((u32 *)addr); 296 break; 297 case 8: 298 val = *((long long *)addr); 299 break; 300 default: 301 val = -1; 302 break; 303 } 304 305 p += sprintf(p, "%#lx ", val); 306 addr += size; 307 } 308 309 p += sprintf(p, "\n"); 310 } 311 312 if (info->tx_tbl_num) { 313 p += sprintf(p, "Tx BA stream table:\n"); 314 for (i = 0; i < info->tx_tbl_num; i++) 315 p += sprintf(p, "tid = %d, ra = %pM\n", 316 info->tx_tbl[i].tid, info->tx_tbl[i].ra); 317 } 318 319 if (info->rx_tbl_num) { 320 p += sprintf(p, "Rx reorder table:\n"); 321 for (i = 0; i < info->rx_tbl_num; i++) { 322 p += sprintf(p, "tid = %d, ta = %pM, ", 323 info->rx_tbl[i].tid, 324 info->rx_tbl[i].ta); 325 p += sprintf(p, "start_win = %d, ", 326 info->rx_tbl[i].start_win); 327 p += sprintf(p, "win_size = %d, buffer: ", 328 info->rx_tbl[i].win_size); 329 330 for (j = 0; j < info->rx_tbl[i].win_size; j++) 331 p += sprintf(p, "%c ", 332 info->rx_tbl[i].buffer[j] ? 333 '1' : '0'); 334 335 p += sprintf(p, "\n"); 336 } 337 } 338 339 if (info->tdls_peer_num) { 340 p += sprintf(p, "TDLS peer table:\n"); 341 for (i = 0; i < info->tdls_peer_num; i++) { 342 p += sprintf(p, "peer = %pM", 343 info->tdls_list[i].peer_addr); 344 p += sprintf(p, "\n"); 345 } 346 } 347 348 return p - buf; 349 } 350 351 static int 352 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len, 353 struct rxpd *rx_pd) 354 { 355 u16 stype; 356 u8 category, action_code, *addr2; 357 struct ieee80211_hdr *ieee_hdr = (void *)payload; 358 359 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE); 360 361 switch (stype) { 362 case IEEE80211_STYPE_ACTION: 363 category = *(payload + sizeof(struct ieee80211_hdr)); 364 switch (category) { 365 case WLAN_CATEGORY_PUBLIC: 366 action_code = *(payload + sizeof(struct ieee80211_hdr) 367 + 1); 368 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { 369 addr2 = ieee_hdr->addr2; 370 mwifiex_dbg(priv->adapter, INFO, 371 "TDLS discovery response %pM nf=%d, snr=%d\n", 372 addr2, rx_pd->nf, rx_pd->snr); 373 mwifiex_auto_tdls_update_peer_signal(priv, 374 addr2, 375 rx_pd->snr, 376 rx_pd->nf); 377 } 378 break; 379 case WLAN_CATEGORY_BACK: 380 /*we dont indicate BACK action frames to cfg80211*/ 381 mwifiex_dbg(priv->adapter, INFO, 382 "drop BACK action frames"); 383 return -1; 384 default: 385 mwifiex_dbg(priv->adapter, INFO, 386 "unknown public action frame category %d\n", 387 category); 388 } 389 default: 390 mwifiex_dbg(priv->adapter, INFO, 391 "unknown mgmt frame subtype %#x\n", stype); 392 return 0; 393 } 394 395 return 0; 396 } 397 /* 398 * This function processes the received management packet and send it 399 * to the kernel. 400 */ 401 int 402 mwifiex_process_mgmt_packet(struct mwifiex_private *priv, 403 struct sk_buff *skb) 404 { 405 struct rxpd *rx_pd; 406 u16 pkt_len; 407 struct ieee80211_hdr *ieee_hdr; 408 409 if (!skb) 410 return -1; 411 412 if (!priv->mgmt_frame_mask || 413 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) { 414 mwifiex_dbg(priv->adapter, ERROR, 415 "do not receive mgmt frames on uninitialized intf"); 416 return -1; 417 } 418 419 rx_pd = (struct rxpd *)skb->data; 420 421 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset)); 422 skb_pull(skb, sizeof(pkt_len)); 423 424 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length); 425 426 ieee_hdr = (void *)skb->data; 427 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) { 428 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr, 429 pkt_len, rx_pd)) 430 return -1; 431 } 432 /* Remove address4 */ 433 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr), 434 skb->data + sizeof(struct ieee80211_hdr), 435 pkt_len - sizeof(struct ieee80211_hdr)); 436 437 pkt_len -= ETH_ALEN + sizeof(pkt_len); 438 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len); 439 440 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq, 441 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len, 442 0); 443 444 return 0; 445 } 446 447 /* 448 * This function processes the received packet before sending it to the 449 * kernel. 450 * 451 * It extracts the SKB from the received buffer and sends it to kernel. 452 * In case the received buffer does not contain the data in SKB format, 453 * the function creates a blank SKB, fills it with the data from the 454 * received buffer and then sends this new SKB to the kernel. 455 */ 456 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb) 457 { 458 struct mwifiex_sta_node *src_node; 459 struct ethhdr *p_ethhdr; 460 461 if (!skb) 462 return -1; 463 464 priv->stats.rx_bytes += skb->len; 465 priv->stats.rx_packets++; 466 467 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { 468 p_ethhdr = (void *)skb->data; 469 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source); 470 if (src_node) { 471 src_node->stats.last_rx = jiffies; 472 src_node->stats.rx_bytes += skb->len; 473 src_node->stats.rx_packets++; 474 } 475 } 476 477 skb->dev = priv->netdev; 478 skb->protocol = eth_type_trans(skb, priv->netdev); 479 skb->ip_summed = CHECKSUM_NONE; 480 481 /* This is required only in case of 11n and USB/PCIE as we alloc 482 * a buffer of 4K only if its 11N (to be able to receive 4K 483 * AMSDU packets). In case of SD we allocate buffers based 484 * on the size of packet and hence this is not needed. 485 * 486 * Modifying the truesize here as our allocation for each 487 * skb is 4K but we only receive 2K packets and this cause 488 * the kernel to start dropping packets in case where 489 * application has allocated buffer based on 2K size i.e. 490 * if there a 64K packet received (in IP fragments and 491 * application allocates 64K to receive this packet but 492 * this packet would almost double up because we allocate 493 * each 1.5K fragment in 4K and pass it up. As soon as the 494 * 64K limit hits kernel will start to drop rest of the 495 * fragments. Currently we fail the Filesndl-ht.scr script 496 * for UDP, hence this fix 497 */ 498 if ((priv->adapter->iface_type == MWIFIEX_USB || 499 priv->adapter->iface_type == MWIFIEX_PCIE) && 500 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)) 501 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE); 502 503 if (in_interrupt()) 504 netif_rx(skb); 505 else 506 netif_rx_ni(skb); 507 508 return 0; 509 } 510 511 /* 512 * IOCTL completion callback handler. 513 * 514 * This function is called when a pending IOCTL is completed. 515 * 516 * If work queue support is enabled, the function wakes up the 517 * corresponding waiting function. Otherwise, it processes the 518 * IOCTL response and frees the response buffer. 519 */ 520 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter, 521 struct cmd_ctrl_node *cmd_node) 522 { 523 WARN_ON(!cmd_node->wait_q_enabled); 524 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n", 525 adapter->cmd_wait_q.status); 526 527 *cmd_node->condition = true; 528 wake_up_interruptible(&adapter->cmd_wait_q.wait); 529 530 return 0; 531 } 532 533 /* This function will return the pointer to station entry in station list 534 * table which matches specified mac address. 535 * This function should be called after acquiring RA list spinlock. 536 * NULL is returned if station entry is not found in associated STA list. 537 */ 538 struct mwifiex_sta_node * 539 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac) 540 { 541 struct mwifiex_sta_node *node; 542 543 if (!mac) 544 return NULL; 545 546 list_for_each_entry(node, &priv->sta_list, list) { 547 if (!memcmp(node->mac_addr, mac, ETH_ALEN)) 548 return node; 549 } 550 551 return NULL; 552 } 553 554 static struct mwifiex_sta_node * 555 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status) 556 { 557 struct mwifiex_sta_node *node; 558 559 list_for_each_entry(node, &priv->sta_list, list) { 560 if (node->tdls_status == status) 561 return node; 562 } 563 564 return NULL; 565 } 566 567 /* If tdls channel switching is on-going, tx data traffic should be 568 * blocked until the switching stage completed. 569 */ 570 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv) 571 { 572 struct mwifiex_sta_node *sta_ptr; 573 574 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 575 return false; 576 577 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING); 578 if (sta_ptr) 579 return true; 580 581 return false; 582 } 583 584 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv) 585 { 586 struct mwifiex_sta_node *sta_ptr; 587 588 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 589 return false; 590 591 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN); 592 if (sta_ptr) 593 return true; 594 595 return false; 596 } 597 598 /* If tdls channel switching is on-going or tdls operate on off-channel, 599 * cmd path should be blocked until tdls switched to base-channel. 600 */ 601 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv) 602 { 603 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 604 return true; 605 606 if (mwifiex_is_tdls_chan_switching(priv) || 607 mwifiex_is_tdls_off_chan(priv)) 608 return false; 609 610 return true; 611 } 612 613 /* This function will add a sta_node entry to associated station list 614 * table with the given mac address. 615 * If entry exist already, existing entry is returned. 616 * If received mac address is NULL, NULL is returned. 617 */ 618 struct mwifiex_sta_node * 619 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac) 620 { 621 struct mwifiex_sta_node *node; 622 unsigned long flags; 623 624 if (!mac) 625 return NULL; 626 627 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 628 node = mwifiex_get_sta_entry(priv, mac); 629 if (node) 630 goto done; 631 632 node = kzalloc(sizeof(*node), GFP_ATOMIC); 633 if (!node) 634 goto done; 635 636 memcpy(node->mac_addr, mac, ETH_ALEN); 637 list_add_tail(&node->list, &priv->sta_list); 638 639 done: 640 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 641 return node; 642 } 643 644 /* This function will search for HT IE in association request IEs 645 * and set station HT parameters accordingly. 646 */ 647 void 648 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies, 649 int ies_len, struct mwifiex_sta_node *node) 650 { 651 struct ieee_types_header *ht_cap_ie; 652 const struct ieee80211_ht_cap *ht_cap; 653 654 if (!ies) 655 return; 656 657 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, 658 ies_len); 659 if (ht_cap_ie) { 660 ht_cap = (void *)(ht_cap_ie + 1); 661 node->is_11n_enabled = 1; 662 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) & 663 IEEE80211_HT_CAP_MAX_AMSDU ? 664 MWIFIEX_TX_DATA_BUF_SIZE_8K : 665 MWIFIEX_TX_DATA_BUF_SIZE_4K; 666 } else { 667 node->is_11n_enabled = 0; 668 } 669 670 return; 671 } 672 673 /* This function will delete a station entry from station list */ 674 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac) 675 { 676 struct mwifiex_sta_node *node; 677 unsigned long flags; 678 679 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 680 681 node = mwifiex_get_sta_entry(priv, mac); 682 if (node) { 683 list_del(&node->list); 684 kfree(node); 685 } 686 687 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 688 return; 689 } 690 691 /* This function will delete all stations from associated station list. */ 692 void mwifiex_del_all_sta_list(struct mwifiex_private *priv) 693 { 694 struct mwifiex_sta_node *node, *tmp; 695 unsigned long flags; 696 697 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 698 699 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) { 700 list_del(&node->list); 701 kfree(node); 702 } 703 704 INIT_LIST_HEAD(&priv->sta_list); 705 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 706 return; 707 } 708 709 /* This function adds histogram data to histogram array*/ 710 void mwifiex_hist_data_add(struct mwifiex_private *priv, 711 u8 rx_rate, s8 snr, s8 nflr) 712 { 713 struct mwifiex_histogram_data *phist_data = priv->hist_data; 714 715 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES) 716 mwifiex_hist_data_reset(priv); 717 mwifiex_hist_data_set(priv, rx_rate, snr, nflr); 718 } 719 720 /* function to add histogram record */ 721 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr, 722 s8 nflr) 723 { 724 struct mwifiex_histogram_data *phist_data = priv->hist_data; 725 726 atomic_inc(&phist_data->num_samples); 727 atomic_inc(&phist_data->rx_rate[rx_rate]); 728 atomic_inc(&phist_data->snr[snr]); 729 atomic_inc(&phist_data->noise_flr[128 + nflr]); 730 atomic_inc(&phist_data->sig_str[nflr - snr]); 731 } 732 733 /* function to reset histogram data during init/reset */ 734 void mwifiex_hist_data_reset(struct mwifiex_private *priv) 735 { 736 int ix; 737 struct mwifiex_histogram_data *phist_data = priv->hist_data; 738 739 atomic_set(&phist_data->num_samples, 0); 740 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++) 741 atomic_set(&phist_data->rx_rate[ix], 0); 742 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++) 743 atomic_set(&phist_data->snr[ix], 0); 744 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++) 745 atomic_set(&phist_data->noise_flr[ix], 0); 746 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) 747 atomic_set(&phist_data->sig_str[ix], 0); 748 } 749 750 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags) 751 { 752 struct sk_buff *skb; 753 int buf_len, pad; 754 755 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; 756 757 skb = __dev_alloc_skb(buf_len, flags); 758 759 if (!skb) 760 return NULL; 761 762 skb_reserve(skb, MWIFIEX_RX_HEADROOM); 763 764 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - 765 (long)skb->data; 766 767 skb_reserve(skb, pad); 768 769 return skb; 770 } 771 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf); 772