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 {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure), 82 item_addr(num_cmd_host_to_card_failure), 1}, 83 {"num_cmd_sleep_cfm_fail", 84 item_size(num_cmd_sleep_cfm_host_to_card_failure), 85 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1}, 86 {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure), 87 item_addr(num_tx_host_to_card_failure), 1}, 88 {"num_evt_deauth", item_size(num_event_deauth), 89 item_addr(num_event_deauth), 1}, 90 {"num_evt_disassoc", item_size(num_event_disassoc), 91 item_addr(num_event_disassoc), 1}, 92 {"num_evt_link_lost", item_size(num_event_link_lost), 93 item_addr(num_event_link_lost), 1}, 94 {"num_cmd_deauth", item_size(num_cmd_deauth), 95 item_addr(num_cmd_deauth), 1}, 96 {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success), 97 item_addr(num_cmd_assoc_success), 1}, 98 {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure), 99 item_addr(num_cmd_assoc_failure), 1}, 100 {"cmd_sent", item_size(cmd_sent), 101 item_addr(cmd_sent), 1}, 102 {"data_sent", item_size(data_sent), 103 item_addr(data_sent), 1}, 104 {"cmd_resp_received", item_size(cmd_resp_received), 105 item_addr(cmd_resp_received), 1}, 106 {"event_received", item_size(event_received), 107 item_addr(event_received), 1}, 108 109 /* variables defined in struct mwifiex_adapter */ 110 {"cmd_pending", adapter_item_size(cmd_pending), 111 adapter_item_addr(cmd_pending), 1}, 112 {"tx_pending", adapter_item_size(tx_pending), 113 adapter_item_addr(tx_pending), 1}, 114 {"rx_pending", adapter_item_size(rx_pending), 115 adapter_item_addr(rx_pending), 1}, 116 }; 117 118 static int num_of_items = ARRAY_SIZE(items); 119 120 /* 121 * Firmware initialization complete callback handler. 122 * 123 * This function wakes up the function waiting on the init 124 * wait queue for the firmware initialization to complete. 125 */ 126 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter) 127 { 128 129 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) 130 if (adapter->if_ops.init_fw_port) 131 adapter->if_ops.init_fw_port(adapter); 132 133 adapter->init_wait_q_woken = true; 134 wake_up_interruptible(&adapter->init_wait_q); 135 return 0; 136 } 137 138 /* 139 * Firmware shutdown complete callback handler. 140 * 141 * This function sets the hardware status to not ready and wakes up 142 * the function waiting on the init wait queue for the firmware 143 * shutdown to complete. 144 */ 145 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter) 146 { 147 adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY; 148 adapter->init_wait_q_woken = true; 149 wake_up_interruptible(&adapter->init_wait_q); 150 return 0; 151 } 152 153 /* 154 * This function sends init/shutdown command 155 * to firmware. 156 */ 157 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv, 158 u32 func_init_shutdown) 159 { 160 u16 cmd; 161 162 if (func_init_shutdown == MWIFIEX_FUNC_INIT) { 163 cmd = HostCmd_CMD_FUNC_INIT; 164 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) { 165 cmd = HostCmd_CMD_FUNC_SHUTDOWN; 166 } else { 167 mwifiex_dbg(priv->adapter, ERROR, 168 "unsupported parameter\n"); 169 return -1; 170 } 171 172 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true); 173 } 174 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw); 175 176 /* 177 * IOCTL request handler to set/get debug information. 178 * 179 * This function collates/sets the information from/to different driver 180 * structures. 181 */ 182 int mwifiex_get_debug_info(struct mwifiex_private *priv, 183 struct mwifiex_debug_info *info) 184 { 185 struct mwifiex_adapter *adapter = priv->adapter; 186 187 if (info) { 188 info->debug_mask = adapter->debug_mask; 189 memcpy(info->packets_out, 190 priv->wmm.packets_out, 191 sizeof(priv->wmm.packets_out)); 192 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size; 193 info->tx_buf_size = (u32) adapter->tx_buf_size; 194 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv, 195 info->rx_tbl); 196 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv, 197 info->tx_tbl); 198 info->tdls_peer_num = mwifiex_get_tdls_list(priv, 199 info->tdls_list); 200 info->ps_mode = adapter->ps_mode; 201 info->ps_state = adapter->ps_state; 202 info->is_deep_sleep = adapter->is_deep_sleep; 203 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req; 204 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try; 205 info->is_hs_configured = adapter->is_hs_configured; 206 info->hs_activated = adapter->hs_activated; 207 info->is_cmd_timedout = adapter->is_cmd_timedout; 208 info->num_cmd_host_to_card_failure 209 = adapter->dbg.num_cmd_host_to_card_failure; 210 info->num_cmd_sleep_cfm_host_to_card_failure 211 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure; 212 info->num_tx_host_to_card_failure 213 = adapter->dbg.num_tx_host_to_card_failure; 214 info->num_event_deauth = adapter->dbg.num_event_deauth; 215 info->num_event_disassoc = adapter->dbg.num_event_disassoc; 216 info->num_event_link_lost = adapter->dbg.num_event_link_lost; 217 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth; 218 info->num_cmd_assoc_success = 219 adapter->dbg.num_cmd_assoc_success; 220 info->num_cmd_assoc_failure = 221 adapter->dbg.num_cmd_assoc_failure; 222 info->num_tx_timeout = adapter->dbg.num_tx_timeout; 223 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id; 224 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act; 225 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id, 226 sizeof(adapter->dbg.last_cmd_id)); 227 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act, 228 sizeof(adapter->dbg.last_cmd_act)); 229 info->last_cmd_index = adapter->dbg.last_cmd_index; 230 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id, 231 sizeof(adapter->dbg.last_cmd_resp_id)); 232 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index; 233 memcpy(info->last_event, adapter->dbg.last_event, 234 sizeof(adapter->dbg.last_event)); 235 info->last_event_index = adapter->dbg.last_event_index; 236 info->data_sent = adapter->data_sent; 237 info->cmd_sent = adapter->cmd_sent; 238 info->cmd_resp_received = adapter->cmd_resp_received; 239 } 240 241 return 0; 242 } 243 244 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf, 245 struct mwifiex_debug_info *info) 246 { 247 char *p = buf; 248 struct mwifiex_debug_data *d = &items[0]; 249 size_t size, addr; 250 long val; 251 int i, j; 252 253 if (!info) 254 return 0; 255 256 for (i = 0; i < num_of_items; i++) { 257 p += sprintf(p, "%s=", d[i].name); 258 259 size = d[i].size / d[i].num; 260 261 if (i < (num_of_items - 3)) 262 addr = d[i].addr + (size_t)info; 263 else /* The last 3 items are struct mwifiex_adapter variables */ 264 addr = d[i].addr + (size_t)priv->adapter; 265 266 for (j = 0; j < d[i].num; j++) { 267 switch (size) { 268 case 1: 269 val = *((u8 *)addr); 270 break; 271 case 2: 272 val = *((u16 *)addr); 273 break; 274 case 4: 275 val = *((u32 *)addr); 276 break; 277 case 8: 278 val = *((long long *)addr); 279 break; 280 default: 281 val = -1; 282 break; 283 } 284 285 p += sprintf(p, "%#lx ", val); 286 addr += size; 287 } 288 289 p += sprintf(p, "\n"); 290 } 291 292 if (info->tx_tbl_num) { 293 p += sprintf(p, "Tx BA stream table:\n"); 294 for (i = 0; i < info->tx_tbl_num; i++) 295 p += sprintf(p, "tid = %d, ra = %pM\n", 296 info->tx_tbl[i].tid, info->tx_tbl[i].ra); 297 } 298 299 if (info->rx_tbl_num) { 300 p += sprintf(p, "Rx reorder table:\n"); 301 for (i = 0; i < info->rx_tbl_num; i++) { 302 p += sprintf(p, "tid = %d, ta = %pM, ", 303 info->rx_tbl[i].tid, 304 info->rx_tbl[i].ta); 305 p += sprintf(p, "start_win = %d, ", 306 info->rx_tbl[i].start_win); 307 p += sprintf(p, "win_size = %d, buffer: ", 308 info->rx_tbl[i].win_size); 309 310 for (j = 0; j < info->rx_tbl[i].win_size; j++) 311 p += sprintf(p, "%c ", 312 info->rx_tbl[i].buffer[j] ? 313 '1' : '0'); 314 315 p += sprintf(p, "\n"); 316 } 317 } 318 319 if (info->tdls_peer_num) { 320 p += sprintf(p, "TDLS peer table:\n"); 321 for (i = 0; i < info->tdls_peer_num; i++) { 322 p += sprintf(p, "peer = %pM", 323 info->tdls_list[i].peer_addr); 324 p += sprintf(p, "\n"); 325 } 326 } 327 328 return p - buf; 329 } 330 331 static int 332 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len, 333 struct rxpd *rx_pd) 334 { 335 u16 stype; 336 u8 category, action_code, *addr2; 337 struct ieee80211_hdr *ieee_hdr = (void *)payload; 338 339 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE); 340 341 switch (stype) { 342 case IEEE80211_STYPE_ACTION: 343 category = *(payload + sizeof(struct ieee80211_hdr)); 344 switch (category) { 345 case WLAN_CATEGORY_PUBLIC: 346 action_code = *(payload + sizeof(struct ieee80211_hdr) 347 + 1); 348 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { 349 addr2 = ieee_hdr->addr2; 350 mwifiex_dbg(priv->adapter, INFO, 351 "TDLS discovery response %pM nf=%d, snr=%d\n", 352 addr2, rx_pd->nf, rx_pd->snr); 353 mwifiex_auto_tdls_update_peer_signal(priv, 354 addr2, 355 rx_pd->snr, 356 rx_pd->nf); 357 } 358 break; 359 case WLAN_CATEGORY_BACK: 360 /*we dont indicate BACK action frames to cfg80211*/ 361 mwifiex_dbg(priv->adapter, INFO, 362 "drop BACK action frames"); 363 return -1; 364 default: 365 mwifiex_dbg(priv->adapter, INFO, 366 "unknown public action frame category %d\n", 367 category); 368 } 369 default: 370 mwifiex_dbg(priv->adapter, INFO, 371 "unknown mgmt frame subtype %#x\n", stype); 372 return 0; 373 } 374 375 return 0; 376 } 377 /* 378 * This function processes the received management packet and send it 379 * to the kernel. 380 */ 381 int 382 mwifiex_process_mgmt_packet(struct mwifiex_private *priv, 383 struct sk_buff *skb) 384 { 385 struct rxpd *rx_pd; 386 u16 pkt_len; 387 struct ieee80211_hdr *ieee_hdr; 388 389 if (!skb) 390 return -1; 391 392 if (!priv->mgmt_frame_mask || 393 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) { 394 mwifiex_dbg(priv->adapter, ERROR, 395 "do not receive mgmt frames on uninitialized intf"); 396 return -1; 397 } 398 399 rx_pd = (struct rxpd *)skb->data; 400 401 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset)); 402 skb_pull(skb, sizeof(pkt_len)); 403 404 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length); 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 + sizeof(pkt_len); 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 if (in_interrupt()) 484 netif_rx(skb); 485 else 486 netif_rx_ni(skb); 487 488 return 0; 489 } 490 491 /* 492 * IOCTL completion callback handler. 493 * 494 * This function is called when a pending IOCTL is completed. 495 * 496 * If work queue support is enabled, the function wakes up the 497 * corresponding waiting function. Otherwise, it processes the 498 * IOCTL response and frees the response buffer. 499 */ 500 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter, 501 struct cmd_ctrl_node *cmd_node) 502 { 503 WARN_ON(!cmd_node->wait_q_enabled); 504 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n", 505 adapter->cmd_wait_q.status); 506 507 *cmd_node->condition = true; 508 wake_up_interruptible(&adapter->cmd_wait_q.wait); 509 510 return 0; 511 } 512 513 /* This function will return the pointer to station entry in station list 514 * table which matches specified mac address. 515 * This function should be called after acquiring RA list spinlock. 516 * NULL is returned if station entry is not found in associated STA list. 517 */ 518 struct mwifiex_sta_node * 519 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac) 520 { 521 struct mwifiex_sta_node *node; 522 523 if (!mac) 524 return NULL; 525 526 list_for_each_entry(node, &priv->sta_list, list) { 527 if (!memcmp(node->mac_addr, mac, ETH_ALEN)) 528 return node; 529 } 530 531 return NULL; 532 } 533 534 static struct mwifiex_sta_node * 535 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status) 536 { 537 struct mwifiex_sta_node *node; 538 539 list_for_each_entry(node, &priv->sta_list, list) { 540 if (node->tdls_status == status) 541 return node; 542 } 543 544 return NULL; 545 } 546 547 /* If tdls channel switching is on-going, tx data traffic should be 548 * blocked until the switching stage completed. 549 */ 550 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv) 551 { 552 struct mwifiex_sta_node *sta_ptr; 553 554 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 555 return false; 556 557 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING); 558 if (sta_ptr) 559 return true; 560 561 return false; 562 } 563 564 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv) 565 { 566 struct mwifiex_sta_node *sta_ptr; 567 568 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 569 return false; 570 571 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN); 572 if (sta_ptr) 573 return true; 574 575 return false; 576 } 577 578 /* If tdls channel switching is on-going or tdls operate on off-channel, 579 * cmd path should be blocked until tdls switched to base-channel. 580 */ 581 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv) 582 { 583 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) 584 return true; 585 586 if (mwifiex_is_tdls_chan_switching(priv) || 587 mwifiex_is_tdls_off_chan(priv)) 588 return false; 589 590 return true; 591 } 592 593 /* This function will add a sta_node entry to associated station list 594 * table with the given mac address. 595 * If entry exist already, existing entry is returned. 596 * If received mac address is NULL, NULL is returned. 597 */ 598 struct mwifiex_sta_node * 599 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac) 600 { 601 struct mwifiex_sta_node *node; 602 unsigned long flags; 603 604 if (!mac) 605 return NULL; 606 607 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 608 node = mwifiex_get_sta_entry(priv, mac); 609 if (node) 610 goto done; 611 612 node = kzalloc(sizeof(*node), GFP_ATOMIC); 613 if (!node) 614 goto done; 615 616 memcpy(node->mac_addr, mac, ETH_ALEN); 617 list_add_tail(&node->list, &priv->sta_list); 618 619 done: 620 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 621 return node; 622 } 623 624 /* This function will search for HT IE in association request IEs 625 * and set station HT parameters accordingly. 626 */ 627 void 628 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies, 629 int ies_len, struct mwifiex_sta_node *node) 630 { 631 struct ieee_types_header *ht_cap_ie; 632 const struct ieee80211_ht_cap *ht_cap; 633 634 if (!ies) 635 return; 636 637 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, 638 ies_len); 639 if (ht_cap_ie) { 640 ht_cap = (void *)(ht_cap_ie + 1); 641 node->is_11n_enabled = 1; 642 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) & 643 IEEE80211_HT_CAP_MAX_AMSDU ? 644 MWIFIEX_TX_DATA_BUF_SIZE_8K : 645 MWIFIEX_TX_DATA_BUF_SIZE_4K; 646 } else { 647 node->is_11n_enabled = 0; 648 } 649 650 return; 651 } 652 653 /* This function will delete a station entry from station list */ 654 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac) 655 { 656 struct mwifiex_sta_node *node; 657 unsigned long flags; 658 659 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 660 661 node = mwifiex_get_sta_entry(priv, mac); 662 if (node) { 663 list_del(&node->list); 664 kfree(node); 665 } 666 667 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 668 return; 669 } 670 671 /* This function will delete all stations from associated station list. */ 672 void mwifiex_del_all_sta_list(struct mwifiex_private *priv) 673 { 674 struct mwifiex_sta_node *node, *tmp; 675 unsigned long flags; 676 677 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 678 679 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) { 680 list_del(&node->list); 681 kfree(node); 682 } 683 684 INIT_LIST_HEAD(&priv->sta_list); 685 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 686 return; 687 } 688 689 /* This function adds histogram data to histogram array*/ 690 void mwifiex_hist_data_add(struct mwifiex_private *priv, 691 u8 rx_rate, s8 snr, s8 nflr) 692 { 693 struct mwifiex_histogram_data *phist_data = priv->hist_data; 694 695 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES) 696 mwifiex_hist_data_reset(priv); 697 mwifiex_hist_data_set(priv, rx_rate, snr, nflr); 698 } 699 700 /* function to add histogram record */ 701 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr, 702 s8 nflr) 703 { 704 struct mwifiex_histogram_data *phist_data = priv->hist_data; 705 706 atomic_inc(&phist_data->num_samples); 707 atomic_inc(&phist_data->rx_rate[rx_rate]); 708 atomic_inc(&phist_data->snr[snr]); 709 atomic_inc(&phist_data->noise_flr[128 + nflr]); 710 atomic_inc(&phist_data->sig_str[nflr - snr]); 711 } 712 713 /* function to reset histogram data during init/reset */ 714 void mwifiex_hist_data_reset(struct mwifiex_private *priv) 715 { 716 int ix; 717 struct mwifiex_histogram_data *phist_data = priv->hist_data; 718 719 atomic_set(&phist_data->num_samples, 0); 720 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++) 721 atomic_set(&phist_data->rx_rate[ix], 0); 722 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++) 723 atomic_set(&phist_data->snr[ix], 0); 724 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++) 725 atomic_set(&phist_data->noise_flr[ix], 0); 726 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) 727 atomic_set(&phist_data->sig_str[ix], 0); 728 } 729 730 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags) 731 { 732 struct sk_buff *skb; 733 int buf_len, pad; 734 735 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; 736 737 skb = __dev_alloc_skb(buf_len, flags); 738 739 if (!skb) 740 return NULL; 741 742 skb_reserve(skb, MWIFIEX_RX_HEADROOM); 743 744 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - 745 (long)skb->data; 746 747 skb_reserve(skb, pad); 748 749 return skb; 750 } 751 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf); 752