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