1 /* 2 * Marvell Wireless LAN device driver: major 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 "main.h" 21 #include "wmm.h" 22 #include "cfg80211.h" 23 #include "11n.h" 24 25 #define VERSION "1.0" 26 27 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK; 28 module_param(debug_mask, uint, 0); 29 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags"); 30 31 const char driver_version[] = "mwifiex " VERSION " (%s) "; 32 static char *cal_data_cfg; 33 module_param(cal_data_cfg, charp, 0); 34 35 static unsigned short driver_mode; 36 module_param(driver_mode, ushort, 0); 37 MODULE_PARM_DESC(driver_mode, 38 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7"); 39 40 /* 41 * This function registers the device and performs all the necessary 42 * initializations. 43 * 44 * The following initialization operations are performed - 45 * - Allocate adapter structure 46 * - Save interface specific operations table in adapter 47 * - Call interface specific initialization routine 48 * - Allocate private structures 49 * - Set default adapter structure parameters 50 * - Initialize locks 51 * 52 * In case of any errors during inittialization, this function also ensures 53 * proper cleanup before exiting. 54 */ 55 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, 56 void **padapter) 57 { 58 struct mwifiex_adapter *adapter; 59 int i; 60 61 adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); 62 if (!adapter) 63 return -ENOMEM; 64 65 *padapter = adapter; 66 adapter->card = card; 67 68 /* Save interface specific operations in adapter */ 69 memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); 70 adapter->debug_mask = debug_mask; 71 72 /* card specific initialization has been deferred until now .. */ 73 if (adapter->if_ops.init_if) 74 if (adapter->if_ops.init_if(adapter)) 75 goto error; 76 77 adapter->priv_num = 0; 78 79 for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) { 80 /* Allocate memory for private structure */ 81 adapter->priv[i] = 82 kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL); 83 if (!adapter->priv[i]) 84 goto error; 85 86 adapter->priv[i]->adapter = adapter; 87 adapter->priv_num++; 88 } 89 mwifiex_init_lock_list(adapter); 90 91 setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func, 92 (unsigned long)adapter); 93 94 return 0; 95 96 error: 97 mwifiex_dbg(adapter, ERROR, 98 "info: leave mwifiex_register with error\n"); 99 100 for (i = 0; i < adapter->priv_num; i++) 101 kfree(adapter->priv[i]); 102 103 kfree(adapter); 104 105 return -1; 106 } 107 108 /* 109 * This function unregisters the device and performs all the necessary 110 * cleanups. 111 * 112 * The following cleanup operations are performed - 113 * - Free the timers 114 * - Free beacon buffers 115 * - Free private structures 116 * - Free adapter structure 117 */ 118 static int mwifiex_unregister(struct mwifiex_adapter *adapter) 119 { 120 s32 i; 121 122 if (adapter->if_ops.cleanup_if) 123 adapter->if_ops.cleanup_if(adapter); 124 125 del_timer_sync(&adapter->cmd_timer); 126 127 /* Free private structures */ 128 for (i = 0; i < adapter->priv_num; i++) { 129 if (adapter->priv[i]) { 130 mwifiex_free_curr_bcn(adapter->priv[i]); 131 kfree(adapter->priv[i]); 132 } 133 } 134 135 if (adapter->nd_info) { 136 for (i = 0 ; i < adapter->nd_info->n_matches ; i++) 137 kfree(adapter->nd_info->matches[i]); 138 kfree(adapter->nd_info); 139 adapter->nd_info = NULL; 140 } 141 142 vfree(adapter->chan_stats); 143 kfree(adapter); 144 return 0; 145 } 146 147 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter) 148 { 149 unsigned long flags; 150 151 spin_lock_irqsave(&adapter->main_proc_lock, flags); 152 if (adapter->mwifiex_processing) { 153 adapter->more_task_flag = true; 154 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 155 } else { 156 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 157 queue_work(adapter->workqueue, &adapter->main_work); 158 } 159 } 160 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work); 161 162 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter) 163 { 164 unsigned long flags; 165 166 spin_lock_irqsave(&adapter->rx_proc_lock, flags); 167 if (adapter->rx_processing) { 168 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); 169 } else { 170 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); 171 queue_work(adapter->rx_workqueue, &adapter->rx_work); 172 } 173 } 174 175 static int mwifiex_process_rx(struct mwifiex_adapter *adapter) 176 { 177 unsigned long flags; 178 struct sk_buff *skb; 179 struct mwifiex_rxinfo *rx_info; 180 181 spin_lock_irqsave(&adapter->rx_proc_lock, flags); 182 if (adapter->rx_processing || adapter->rx_locked) { 183 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); 184 goto exit_rx_proc; 185 } else { 186 adapter->rx_processing = true; 187 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); 188 } 189 190 /* Check for Rx data */ 191 while ((skb = skb_dequeue(&adapter->rx_data_q))) { 192 atomic_dec(&adapter->rx_pending); 193 if ((adapter->delay_main_work || 194 adapter->iface_type == MWIFIEX_USB) && 195 (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) { 196 if (adapter->if_ops.submit_rem_rx_urbs) 197 adapter->if_ops.submit_rem_rx_urbs(adapter); 198 adapter->delay_main_work = false; 199 mwifiex_queue_main_work(adapter); 200 } 201 rx_info = MWIFIEX_SKB_RXCB(skb); 202 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) { 203 if (adapter->if_ops.deaggr_pkt) 204 adapter->if_ops.deaggr_pkt(adapter, skb); 205 dev_kfree_skb_any(skb); 206 } else { 207 mwifiex_handle_rx_packet(adapter, skb); 208 } 209 } 210 spin_lock_irqsave(&adapter->rx_proc_lock, flags); 211 adapter->rx_processing = false; 212 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); 213 214 exit_rx_proc: 215 return 0; 216 } 217 218 /* 219 * The main process. 220 * 221 * This function is the main procedure of the driver and handles various driver 222 * operations. It runs in a loop and provides the core functionalities. 223 * 224 * The main responsibilities of this function are - 225 * - Ensure concurrency control 226 * - Handle pending interrupts and call interrupt handlers 227 * - Wake up the card if required 228 * - Handle command responses and call response handlers 229 * - Handle events and call event handlers 230 * - Execute pending commands 231 * - Transmit pending data packets 232 */ 233 int mwifiex_main_process(struct mwifiex_adapter *adapter) 234 { 235 int ret = 0; 236 unsigned long flags; 237 238 spin_lock_irqsave(&adapter->main_proc_lock, flags); 239 240 /* Check if already processing */ 241 if (adapter->mwifiex_processing || adapter->main_locked) { 242 adapter->more_task_flag = true; 243 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 244 goto exit_main_proc; 245 } else { 246 adapter->mwifiex_processing = true; 247 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 248 } 249 process_start: 250 do { 251 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || 252 (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) 253 break; 254 255 /* For non-USB interfaces, If we process interrupts first, it 256 * would increase RX pending even further. Avoid this by 257 * checking if rx_pending has crossed high threshold and 258 * schedule rx work queue and then process interrupts. 259 * For USB interface, there are no interrupts. We already have 260 * HIGH_RX_PENDING check in usb.c 261 */ 262 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING && 263 adapter->iface_type != MWIFIEX_USB) { 264 adapter->delay_main_work = true; 265 mwifiex_queue_rx_work(adapter); 266 break; 267 } 268 269 /* Handle pending interrupt if any */ 270 if (adapter->int_status) { 271 if (adapter->hs_activated) 272 mwifiex_process_hs_config(adapter); 273 if (adapter->if_ops.process_int_status) 274 adapter->if_ops.process_int_status(adapter); 275 } 276 277 if (adapter->rx_work_enabled && adapter->data_received) 278 mwifiex_queue_rx_work(adapter); 279 280 /* Need to wake up the card ? */ 281 if ((adapter->ps_state == PS_STATE_SLEEP) && 282 (adapter->pm_wakeup_card_req && 283 !adapter->pm_wakeup_fw_try) && 284 (is_command_pending(adapter) || 285 !skb_queue_empty(&adapter->tx_data_q) || 286 !mwifiex_bypass_txlist_empty(adapter) || 287 !mwifiex_wmm_lists_empty(adapter))) { 288 adapter->pm_wakeup_fw_try = true; 289 mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3)); 290 adapter->if_ops.wakeup(adapter); 291 continue; 292 } 293 294 if (IS_CARD_RX_RCVD(adapter)) { 295 adapter->data_received = false; 296 adapter->pm_wakeup_fw_try = false; 297 del_timer(&adapter->wakeup_timer); 298 if (adapter->ps_state == PS_STATE_SLEEP) 299 adapter->ps_state = PS_STATE_AWAKE; 300 } else { 301 /* We have tried to wakeup the card already */ 302 if (adapter->pm_wakeup_fw_try) 303 break; 304 if (adapter->ps_state != PS_STATE_AWAKE) 305 break; 306 if (adapter->tx_lock_flag) { 307 if (adapter->iface_type == MWIFIEX_USB) { 308 if (!adapter->usb_mc_setup) 309 break; 310 } else 311 break; 312 } 313 314 if ((!adapter->scan_chan_gap_enabled && 315 adapter->scan_processing) || adapter->data_sent || 316 mwifiex_is_tdls_chan_switching 317 (mwifiex_get_priv(adapter, 318 MWIFIEX_BSS_ROLE_STA)) || 319 (mwifiex_wmm_lists_empty(adapter) && 320 mwifiex_bypass_txlist_empty(adapter) && 321 skb_queue_empty(&adapter->tx_data_q))) { 322 if (adapter->cmd_sent || adapter->curr_cmd || 323 !mwifiex_is_send_cmd_allowed 324 (mwifiex_get_priv(adapter, 325 MWIFIEX_BSS_ROLE_STA)) || 326 (!is_command_pending(adapter))) 327 break; 328 } 329 } 330 331 /* Check for event */ 332 if (adapter->event_received) { 333 adapter->event_received = false; 334 mwifiex_process_event(adapter); 335 } 336 337 /* Check for Cmd Resp */ 338 if (adapter->cmd_resp_received) { 339 adapter->cmd_resp_received = false; 340 mwifiex_process_cmdresp(adapter); 341 342 /* call mwifiex back when init_fw is done */ 343 if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { 344 adapter->hw_status = MWIFIEX_HW_STATUS_READY; 345 mwifiex_init_fw_complete(adapter); 346 } 347 } 348 349 /* Check if we need to confirm Sleep Request 350 received previously */ 351 if (adapter->ps_state == PS_STATE_PRE_SLEEP) { 352 if (!adapter->cmd_sent && !adapter->curr_cmd) 353 mwifiex_check_ps_cond(adapter); 354 } 355 356 /* * The ps_state may have been changed during processing of 357 * Sleep Request event. 358 */ 359 if ((adapter->ps_state == PS_STATE_SLEEP) || 360 (adapter->ps_state == PS_STATE_PRE_SLEEP) || 361 (adapter->ps_state == PS_STATE_SLEEP_CFM)) { 362 continue; 363 } 364 365 if (adapter->tx_lock_flag) { 366 if (adapter->iface_type == MWIFIEX_USB) { 367 if (!adapter->usb_mc_setup) 368 continue; 369 } else 370 continue; 371 } 372 373 if (!adapter->cmd_sent && !adapter->curr_cmd && 374 mwifiex_is_send_cmd_allowed 375 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { 376 if (mwifiex_exec_next_cmd(adapter) == -1) { 377 ret = -1; 378 break; 379 } 380 } 381 382 /** If USB Multi channel setup ongoing, 383 * wait for ready to tx data. 384 */ 385 if (adapter->iface_type == MWIFIEX_USB && 386 adapter->usb_mc_setup) 387 continue; 388 389 if ((adapter->scan_chan_gap_enabled || 390 !adapter->scan_processing) && 391 !adapter->data_sent && 392 !skb_queue_empty(&adapter->tx_data_q)) { 393 mwifiex_process_tx_queue(adapter); 394 if (adapter->hs_activated) { 395 adapter->is_hs_configured = false; 396 mwifiex_hs_activated_event 397 (mwifiex_get_priv 398 (adapter, MWIFIEX_BSS_ROLE_ANY), 399 false); 400 } 401 } 402 403 if ((adapter->scan_chan_gap_enabled || 404 !adapter->scan_processing) && 405 !adapter->data_sent && 406 !mwifiex_bypass_txlist_empty(adapter) && 407 !mwifiex_is_tdls_chan_switching 408 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { 409 mwifiex_process_bypass_tx(adapter); 410 if (adapter->hs_activated) { 411 adapter->is_hs_configured = false; 412 mwifiex_hs_activated_event 413 (mwifiex_get_priv 414 (adapter, MWIFIEX_BSS_ROLE_ANY), 415 false); 416 } 417 } 418 419 if ((adapter->scan_chan_gap_enabled || 420 !adapter->scan_processing) && 421 !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) && 422 !mwifiex_is_tdls_chan_switching 423 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { 424 mwifiex_wmm_process_tx(adapter); 425 if (adapter->hs_activated) { 426 adapter->is_hs_configured = false; 427 mwifiex_hs_activated_event 428 (mwifiex_get_priv 429 (adapter, MWIFIEX_BSS_ROLE_ANY), 430 false); 431 } 432 } 433 434 if (adapter->delay_null_pkt && !adapter->cmd_sent && 435 !adapter->curr_cmd && !is_command_pending(adapter) && 436 (mwifiex_wmm_lists_empty(adapter) && 437 mwifiex_bypass_txlist_empty(adapter) && 438 skb_queue_empty(&adapter->tx_data_q))) { 439 if (!mwifiex_send_null_packet 440 (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), 441 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | 442 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { 443 adapter->delay_null_pkt = false; 444 adapter->ps_state = PS_STATE_SLEEP; 445 } 446 break; 447 } 448 } while (true); 449 450 spin_lock_irqsave(&adapter->main_proc_lock, flags); 451 if (adapter->more_task_flag) { 452 adapter->more_task_flag = false; 453 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 454 goto process_start; 455 } 456 adapter->mwifiex_processing = false; 457 spin_unlock_irqrestore(&adapter->main_proc_lock, flags); 458 459 exit_main_proc: 460 if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) 461 mwifiex_shutdown_drv(adapter); 462 return ret; 463 } 464 EXPORT_SYMBOL_GPL(mwifiex_main_process); 465 466 /* 467 * This function frees the adapter structure. 468 * 469 * Additionally, this closes the netlink socket, frees the timers 470 * and private structures. 471 */ 472 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) 473 { 474 if (!adapter) { 475 pr_err("%s: adapter is NULL\n", __func__); 476 return; 477 } 478 479 mwifiex_unregister(adapter); 480 pr_debug("info: %s: free adapter\n", __func__); 481 } 482 483 /* 484 * This function cancels all works in the queue and destroys 485 * the main workqueue. 486 */ 487 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) 488 { 489 flush_workqueue(adapter->workqueue); 490 destroy_workqueue(adapter->workqueue); 491 adapter->workqueue = NULL; 492 493 if (adapter->rx_workqueue) { 494 flush_workqueue(adapter->rx_workqueue); 495 destroy_workqueue(adapter->rx_workqueue); 496 adapter->rx_workqueue = NULL; 497 } 498 } 499 500 /* 501 * This function gets firmware and initializes it. 502 * 503 * The main initialization steps followed are - 504 * - Download the correct firmware to card 505 * - Issue the init commands to firmware 506 */ 507 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) 508 { 509 int ret; 510 char fmt[64]; 511 struct mwifiex_private *priv; 512 struct mwifiex_adapter *adapter = context; 513 struct mwifiex_fw_image fw; 514 struct semaphore *sem = adapter->card_sem; 515 bool init_failed = false; 516 struct wireless_dev *wdev; 517 518 if (!firmware) { 519 mwifiex_dbg(adapter, ERROR, 520 "Failed to get firmware %s\n", adapter->fw_name); 521 goto err_dnld_fw; 522 } 523 524 memset(&fw, 0, sizeof(struct mwifiex_fw_image)); 525 adapter->firmware = firmware; 526 fw.fw_buf = (u8 *) adapter->firmware->data; 527 fw.fw_len = adapter->firmware->size; 528 529 if (adapter->if_ops.dnld_fw) 530 ret = adapter->if_ops.dnld_fw(adapter, &fw); 531 else 532 ret = mwifiex_dnld_fw(adapter, &fw); 533 if (ret == -1) 534 goto err_dnld_fw; 535 536 mwifiex_dbg(adapter, MSG, "WLAN FW is active\n"); 537 538 if (cal_data_cfg) { 539 if ((request_firmware(&adapter->cal_data, cal_data_cfg, 540 adapter->dev)) < 0) 541 mwifiex_dbg(adapter, ERROR, 542 "Cal data request_firmware() failed\n"); 543 } 544 545 /* enable host interrupt after fw dnld is successful */ 546 if (adapter->if_ops.enable_int) { 547 if (adapter->if_ops.enable_int(adapter)) 548 goto err_dnld_fw; 549 } 550 551 adapter->init_wait_q_woken = false; 552 ret = mwifiex_init_fw(adapter); 553 if (ret == -1) { 554 goto err_init_fw; 555 } else if (!ret) { 556 adapter->hw_status = MWIFIEX_HW_STATUS_READY; 557 goto done; 558 } 559 /* Wait for mwifiex_init to complete */ 560 wait_event_interruptible(adapter->init_wait_q, 561 adapter->init_wait_q_woken); 562 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) 563 goto err_init_fw; 564 565 priv = adapter->priv[MWIFIEX_BSS_ROLE_STA]; 566 if (mwifiex_register_cfg80211(adapter)) { 567 mwifiex_dbg(adapter, ERROR, 568 "cannot register with cfg80211\n"); 569 goto err_init_fw; 570 } 571 572 if (mwifiex_init_channel_scan_gap(adapter)) { 573 mwifiex_dbg(adapter, ERROR, 574 "could not init channel stats table\n"); 575 goto err_init_fw; 576 } 577 578 if (driver_mode) { 579 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK; 580 driver_mode |= MWIFIEX_DRIVER_MODE_STA; 581 } 582 583 rtnl_lock(); 584 /* Create station interface by default */ 585 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM, 586 NL80211_IFTYPE_STATION, NULL, NULL); 587 if (IS_ERR(wdev)) { 588 mwifiex_dbg(adapter, ERROR, 589 "cannot create default STA interface\n"); 590 rtnl_unlock(); 591 goto err_add_intf; 592 } 593 594 if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) { 595 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM, 596 NL80211_IFTYPE_AP, NULL, NULL); 597 if (IS_ERR(wdev)) { 598 mwifiex_dbg(adapter, ERROR, 599 "cannot create AP interface\n"); 600 rtnl_unlock(); 601 goto err_add_intf; 602 } 603 } 604 605 if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) { 606 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM, 607 NL80211_IFTYPE_P2P_CLIENT, NULL, 608 NULL); 609 if (IS_ERR(wdev)) { 610 mwifiex_dbg(adapter, ERROR, 611 "cannot create p2p client interface\n"); 612 rtnl_unlock(); 613 goto err_add_intf; 614 } 615 } 616 rtnl_unlock(); 617 618 mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); 619 mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt); 620 goto done; 621 622 err_add_intf: 623 wiphy_unregister(adapter->wiphy); 624 wiphy_free(adapter->wiphy); 625 err_init_fw: 626 if (adapter->if_ops.disable_int) 627 adapter->if_ops.disable_int(adapter); 628 err_dnld_fw: 629 mwifiex_dbg(adapter, ERROR, 630 "info: %s: unregister device\n", __func__); 631 if (adapter->if_ops.unregister_dev) 632 adapter->if_ops.unregister_dev(adapter); 633 634 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { 635 pr_debug("info: %s: shutdown mwifiex\n", __func__); 636 adapter->init_wait_q_woken = false; 637 638 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) 639 wait_event_interruptible(adapter->init_wait_q, 640 adapter->init_wait_q_woken); 641 } 642 adapter->surprise_removed = true; 643 mwifiex_terminate_workqueue(adapter); 644 init_failed = true; 645 done: 646 if (adapter->cal_data) { 647 release_firmware(adapter->cal_data); 648 adapter->cal_data = NULL; 649 } 650 if (adapter->firmware) { 651 release_firmware(adapter->firmware); 652 adapter->firmware = NULL; 653 } 654 if (init_failed) 655 mwifiex_free_adapter(adapter); 656 up(sem); 657 return; 658 } 659 660 /* 661 * This function initializes the hardware and gets firmware. 662 */ 663 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) 664 { 665 int ret; 666 667 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name, 668 adapter->dev, GFP_KERNEL, adapter, 669 mwifiex_fw_dpc); 670 if (ret < 0) 671 mwifiex_dbg(adapter, ERROR, 672 "request_firmware_nowait error %d\n", ret); 673 return ret; 674 } 675 676 /* 677 * CFG802.11 network device handler for open. 678 * 679 * Starts the data queue. 680 */ 681 static int 682 mwifiex_open(struct net_device *dev) 683 { 684 netif_carrier_off(dev); 685 686 return 0; 687 } 688 689 /* 690 * CFG802.11 network device handler for close. 691 */ 692 static int 693 mwifiex_close(struct net_device *dev) 694 { 695 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 696 697 if (priv->scan_request) { 698 mwifiex_dbg(priv->adapter, INFO, 699 "aborting scan on ndo_stop\n"); 700 cfg80211_scan_done(priv->scan_request, 1); 701 priv->scan_request = NULL; 702 priv->scan_aborting = true; 703 } 704 705 if (priv->sched_scanning) { 706 mwifiex_dbg(priv->adapter, INFO, 707 "aborting bgscan on ndo_stop\n"); 708 mwifiex_stop_bg_scan(priv); 709 cfg80211_sched_scan_stopped(priv->wdev.wiphy); 710 } 711 712 return 0; 713 } 714 715 static bool 716 mwifiex_bypass_tx_queue(struct mwifiex_private *priv, 717 struct sk_buff *skb) 718 { 719 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; 720 721 if (ntohs(eth_hdr->h_proto) == ETH_P_PAE || 722 mwifiex_is_skb_mgmt_frame(skb) || 723 (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && 724 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && 725 (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) { 726 mwifiex_dbg(priv->adapter, DATA, 727 "bypass txqueue; eth type %#x, mgmt %d\n", 728 ntohs(eth_hdr->h_proto), 729 mwifiex_is_skb_mgmt_frame(skb)); 730 return true; 731 } 732 733 return false; 734 } 735 /* 736 * Add buffer into wmm tx queue and queue work to transmit it. 737 */ 738 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb) 739 { 740 struct netdev_queue *txq; 741 int index = mwifiex_1d_to_wmm_queue[skb->priority]; 742 743 if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) { 744 txq = netdev_get_tx_queue(priv->netdev, index); 745 if (!netif_tx_queue_stopped(txq)) { 746 netif_tx_stop_queue(txq); 747 mwifiex_dbg(priv->adapter, DATA, 748 "stop queue: %d\n", index); 749 } 750 } 751 752 if (mwifiex_bypass_tx_queue(priv, skb)) { 753 atomic_inc(&priv->adapter->tx_pending); 754 atomic_inc(&priv->adapter->bypass_tx_pending); 755 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb); 756 } else { 757 atomic_inc(&priv->adapter->tx_pending); 758 mwifiex_wmm_add_buf_txqueue(priv, skb); 759 } 760 761 mwifiex_queue_main_work(priv->adapter); 762 763 return 0; 764 } 765 766 struct sk_buff * 767 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv, 768 struct sk_buff *skb, u8 flag, u64 *cookie) 769 { 770 struct sk_buff *orig_skb = skb; 771 struct mwifiex_txinfo *tx_info, *orig_tx_info; 772 773 skb = skb_clone(skb, GFP_ATOMIC); 774 if (skb) { 775 unsigned long flags; 776 int id; 777 778 spin_lock_irqsave(&priv->ack_status_lock, flags); 779 id = idr_alloc(&priv->ack_status_frames, orig_skb, 780 1, 0x10, GFP_ATOMIC); 781 spin_unlock_irqrestore(&priv->ack_status_lock, flags); 782 783 if (id >= 0) { 784 tx_info = MWIFIEX_SKB_TXCB(skb); 785 tx_info->ack_frame_id = id; 786 tx_info->flags |= flag; 787 orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb); 788 orig_tx_info->ack_frame_id = id; 789 orig_tx_info->flags |= flag; 790 791 if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie) 792 orig_tx_info->cookie = *cookie; 793 794 } else if (skb_shared(skb)) { 795 kfree_skb(orig_skb); 796 } else { 797 kfree_skb(skb); 798 skb = orig_skb; 799 } 800 } else { 801 /* couldn't clone -- lose tx status ... */ 802 skb = orig_skb; 803 } 804 805 return skb; 806 } 807 808 /* 809 * CFG802.11 network device handler for data transmission. 810 */ 811 static int 812 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 813 { 814 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 815 struct sk_buff *new_skb; 816 struct mwifiex_txinfo *tx_info; 817 bool multicast; 818 819 mwifiex_dbg(priv->adapter, DATA, 820 "data: %lu BSS(%d-%d): Data <= kernel\n", 821 jiffies, priv->bss_type, priv->bss_num); 822 823 if (priv->adapter->surprise_removed) { 824 kfree_skb(skb); 825 priv->stats.tx_dropped++; 826 return 0; 827 } 828 if (!skb->len || (skb->len > ETH_FRAME_LEN)) { 829 mwifiex_dbg(priv->adapter, ERROR, 830 "Tx: bad skb len %d\n", skb->len); 831 kfree_skb(skb); 832 priv->stats.tx_dropped++; 833 return 0; 834 } 835 if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { 836 mwifiex_dbg(priv->adapter, DATA, 837 "data: Tx: insufficient skb headroom %d\n", 838 skb_headroom(skb)); 839 /* Insufficient skb headroom - allocate a new skb */ 840 new_skb = 841 skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); 842 if (unlikely(!new_skb)) { 843 mwifiex_dbg(priv->adapter, ERROR, 844 "Tx: cannot alloca new_skb\n"); 845 kfree_skb(skb); 846 priv->stats.tx_dropped++; 847 return 0; 848 } 849 kfree_skb(skb); 850 skb = new_skb; 851 mwifiex_dbg(priv->adapter, INFO, 852 "info: new skb headroomd %d\n", 853 skb_headroom(skb)); 854 } 855 856 tx_info = MWIFIEX_SKB_TXCB(skb); 857 memset(tx_info, 0, sizeof(*tx_info)); 858 tx_info->bss_num = priv->bss_num; 859 tx_info->bss_type = priv->bss_type; 860 tx_info->pkt_len = skb->len; 861 862 multicast = is_multicast_ether_addr(skb->data); 863 864 if (unlikely(!multicast && skb->sk && 865 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS && 866 priv->adapter->fw_api_ver == MWIFIEX_FW_V15)) 867 skb = mwifiex_clone_skb_for_tx_status(priv, 868 skb, 869 MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL); 870 871 /* Record the current time the packet was queued; used to 872 * determine the amount of time the packet was queued in 873 * the driver before it was sent to the firmware. 874 * The delay is then sent along with the packet to the 875 * firmware for aggregate delay calculation for stats and 876 * MSDU lifetime expiry. 877 */ 878 __net_timestamp(skb); 879 880 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && 881 priv->bss_type == MWIFIEX_BSS_TYPE_STA && 882 !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) { 883 if (priv->adapter->auto_tdls && priv->check_tdls_tx) 884 mwifiex_tdls_check_tx(priv, skb); 885 } 886 887 mwifiex_queue_tx_pkt(priv, skb); 888 889 return 0; 890 } 891 892 /* 893 * CFG802.11 network device handler for setting MAC address. 894 */ 895 static int 896 mwifiex_set_mac_address(struct net_device *dev, void *addr) 897 { 898 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 899 struct sockaddr *hw_addr = addr; 900 int ret; 901 902 memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); 903 904 /* Send request to firmware */ 905 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS, 906 HostCmd_ACT_GEN_SET, 0, NULL, true); 907 908 if (!ret) 909 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); 910 else 911 mwifiex_dbg(priv->adapter, ERROR, 912 "set mac address failed: ret=%d\n", ret); 913 914 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); 915 916 return ret; 917 } 918 919 /* 920 * CFG802.11 network device handler for setting multicast list. 921 */ 922 static void mwifiex_set_multicast_list(struct net_device *dev) 923 { 924 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 925 struct mwifiex_multicast_list mcast_list; 926 927 if (dev->flags & IFF_PROMISC) { 928 mcast_list.mode = MWIFIEX_PROMISC_MODE; 929 } else if (dev->flags & IFF_ALLMULTI || 930 netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { 931 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; 932 } else { 933 mcast_list.mode = MWIFIEX_MULTICAST_MODE; 934 mcast_list.num_multicast_addr = 935 mwifiex_copy_mcast_addr(&mcast_list, dev); 936 } 937 mwifiex_request_set_multicast_list(priv, &mcast_list); 938 } 939 940 /* 941 * CFG802.11 network device handler for transmission timeout. 942 */ 943 static void 944 mwifiex_tx_timeout(struct net_device *dev) 945 { 946 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 947 948 priv->num_tx_timeout++; 949 priv->tx_timeout_cnt++; 950 mwifiex_dbg(priv->adapter, ERROR, 951 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n", 952 jiffies, priv->tx_timeout_cnt, priv->bss_type, 953 priv->bss_num); 954 mwifiex_set_trans_start(dev); 955 956 if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD && 957 priv->adapter->if_ops.card_reset) { 958 mwifiex_dbg(priv->adapter, ERROR, 959 "tx_timeout_cnt exceeds threshold.\t" 960 "Triggering card reset!\n"); 961 priv->adapter->if_ops.card_reset(priv->adapter); 962 } 963 } 964 965 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter) 966 { 967 struct usb_card_rec *card = adapter->card; 968 struct mwifiex_private *priv; 969 u16 tx_buf_size; 970 int i, ret; 971 972 card->mc_resync_flag = true; 973 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) { 974 if (atomic_read(&card->port[i].tx_data_urb_pending)) { 975 mwifiex_dbg(adapter, WARN, "pending data urb in sys\n"); 976 return; 977 } 978 } 979 980 card->mc_resync_flag = false; 981 tx_buf_size = 0xffff; 982 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); 983 ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF, 984 HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false); 985 if (ret) 986 mwifiex_dbg(adapter, ERROR, 987 "send reconfig tx buf size cmd err\n"); 988 } 989 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync); 990 991 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter) 992 { 993 void *p; 994 char drv_version[64]; 995 struct usb_card_rec *cardp; 996 struct sdio_mmc_card *sdio_card; 997 struct mwifiex_private *priv; 998 int i, idx; 999 struct netdev_queue *txq; 1000 struct mwifiex_debug_info *debug_info; 1001 1002 if (adapter->drv_info_dump) { 1003 vfree(adapter->drv_info_dump); 1004 adapter->drv_info_dump = NULL; 1005 adapter->drv_info_size = 0; 1006 } 1007 1008 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n"); 1009 1010 adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX); 1011 1012 if (!adapter->drv_info_dump) 1013 return; 1014 1015 p = (char *)(adapter->drv_info_dump); 1016 p += sprintf(p, "driver_name = " "\"mwifiex\"\n"); 1017 1018 mwifiex_drv_get_driver_version(adapter, drv_version, 1019 sizeof(drv_version) - 1); 1020 p += sprintf(p, "driver_version = %s\n", drv_version); 1021 1022 if (adapter->iface_type == MWIFIEX_USB) { 1023 cardp = (struct usb_card_rec *)adapter->card; 1024 p += sprintf(p, "tx_cmd_urb_pending = %d\n", 1025 atomic_read(&cardp->tx_cmd_urb_pending)); 1026 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n", 1027 atomic_read(&cardp->port[0].tx_data_urb_pending)); 1028 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n", 1029 atomic_read(&cardp->port[1].tx_data_urb_pending)); 1030 p += sprintf(p, "rx_cmd_urb_pending = %d\n", 1031 atomic_read(&cardp->rx_cmd_urb_pending)); 1032 p += sprintf(p, "rx_data_urb_pending = %d\n", 1033 atomic_read(&cardp->rx_data_urb_pending)); 1034 } 1035 1036 p += sprintf(p, "tx_pending = %d\n", 1037 atomic_read(&adapter->tx_pending)); 1038 p += sprintf(p, "rx_pending = %d\n", 1039 atomic_read(&adapter->rx_pending)); 1040 1041 if (adapter->iface_type == MWIFIEX_SDIO) { 1042 sdio_card = (struct sdio_mmc_card *)adapter->card; 1043 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n", 1044 sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port); 1045 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n", 1046 sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port); 1047 } 1048 1049 for (i = 0; i < adapter->priv_num; i++) { 1050 if (!adapter->priv[i] || !adapter->priv[i]->netdev) 1051 continue; 1052 priv = adapter->priv[i]; 1053 p += sprintf(p, "\n[interface : \"%s\"]\n", 1054 priv->netdev->name); 1055 p += sprintf(p, "wmm_tx_pending[0] = %d\n", 1056 atomic_read(&priv->wmm_tx_pending[0])); 1057 p += sprintf(p, "wmm_tx_pending[1] = %d\n", 1058 atomic_read(&priv->wmm_tx_pending[1])); 1059 p += sprintf(p, "wmm_tx_pending[2] = %d\n", 1060 atomic_read(&priv->wmm_tx_pending[2])); 1061 p += sprintf(p, "wmm_tx_pending[3] = %d\n", 1062 atomic_read(&priv->wmm_tx_pending[3])); 1063 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ? 1064 "Disconnected" : "Connected"); 1065 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev) 1066 ? "on" : "off")); 1067 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) { 1068 txq = netdev_get_tx_queue(priv->netdev, idx); 1069 p += sprintf(p, "tx queue %d:%s ", idx, 1070 netif_tx_queue_stopped(txq) ? 1071 "stopped" : "started"); 1072 } 1073 p += sprintf(p, "\n%s: num_tx_timeout = %d\n", 1074 priv->netdev->name, priv->num_tx_timeout); 1075 } 1076 1077 if (adapter->iface_type == MWIFIEX_SDIO || 1078 adapter->iface_type == MWIFIEX_PCIE) { 1079 p += sprintf(p, "\n=== %s register dump===\n", 1080 adapter->iface_type == MWIFIEX_SDIO ? 1081 "SDIO" : "PCIE"); 1082 if (adapter->if_ops.reg_dump) 1083 p += adapter->if_ops.reg_dump(adapter, p); 1084 } 1085 p += sprintf(p, "\n=== more debug information\n"); 1086 debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL); 1087 if (debug_info) { 1088 for (i = 0; i < adapter->priv_num; i++) { 1089 if (!adapter->priv[i] || !adapter->priv[i]->netdev) 1090 continue; 1091 priv = adapter->priv[i]; 1092 mwifiex_get_debug_info(priv, debug_info); 1093 p += mwifiex_debug_info_to_buffer(priv, p, debug_info); 1094 break; 1095 } 1096 kfree(debug_info); 1097 } 1098 1099 adapter->drv_info_size = p - adapter->drv_info_dump; 1100 mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n"); 1101 } 1102 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump); 1103 1104 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter) 1105 { 1106 u8 idx, *dump_data, *fw_dump_ptr; 1107 u32 dump_len; 1108 1109 dump_len = (strlen("========Start dump driverinfo========\n") + 1110 adapter->drv_info_size + 1111 strlen("\n========End dump========\n")); 1112 1113 for (idx = 0; idx < adapter->num_mem_types; idx++) { 1114 struct memory_type_mapping *entry = 1115 &adapter->mem_type_mapping_tbl[idx]; 1116 1117 if (entry->mem_ptr) { 1118 dump_len += (strlen("========Start dump ") + 1119 strlen(entry->mem_name) + 1120 strlen("========\n") + 1121 (entry->mem_size + 1) + 1122 strlen("\n========End dump========\n")); 1123 } 1124 } 1125 1126 dump_data = vzalloc(dump_len + 1); 1127 if (!dump_data) 1128 goto done; 1129 1130 fw_dump_ptr = dump_data; 1131 1132 /* Dump all the memory data into single file, a userspace script will 1133 * be used to split all the memory data to multiple files 1134 */ 1135 mwifiex_dbg(adapter, MSG, 1136 "== mwifiex dump information to /sys/class/devcoredump start"); 1137 1138 strcpy(fw_dump_ptr, "========Start dump driverinfo========\n"); 1139 fw_dump_ptr += strlen("========Start dump driverinfo========\n"); 1140 memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size); 1141 fw_dump_ptr += adapter->drv_info_size; 1142 strcpy(fw_dump_ptr, "\n========End dump========\n"); 1143 fw_dump_ptr += strlen("\n========End dump========\n"); 1144 1145 for (idx = 0; idx < adapter->num_mem_types; idx++) { 1146 struct memory_type_mapping *entry = 1147 &adapter->mem_type_mapping_tbl[idx]; 1148 1149 if (entry->mem_ptr) { 1150 strcpy(fw_dump_ptr, "========Start dump "); 1151 fw_dump_ptr += strlen("========Start dump "); 1152 1153 strcpy(fw_dump_ptr, entry->mem_name); 1154 fw_dump_ptr += strlen(entry->mem_name); 1155 1156 strcpy(fw_dump_ptr, "========\n"); 1157 fw_dump_ptr += strlen("========\n"); 1158 1159 memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size); 1160 fw_dump_ptr += entry->mem_size; 1161 1162 strcpy(fw_dump_ptr, "\n========End dump========\n"); 1163 fw_dump_ptr += strlen("\n========End dump========\n"); 1164 } 1165 } 1166 1167 /* device dump data will be free in device coredump release function 1168 * after 5 min 1169 */ 1170 dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL); 1171 mwifiex_dbg(adapter, MSG, 1172 "== mwifiex dump information to /sys/class/devcoredump end"); 1173 1174 done: 1175 for (idx = 0; idx < adapter->num_mem_types; idx++) { 1176 struct memory_type_mapping *entry = 1177 &adapter->mem_type_mapping_tbl[idx]; 1178 1179 if (entry->mem_ptr) { 1180 vfree(entry->mem_ptr); 1181 entry->mem_ptr = NULL; 1182 } 1183 entry->mem_size = 0; 1184 } 1185 1186 if (adapter->drv_info_dump) { 1187 vfree(adapter->drv_info_dump); 1188 adapter->drv_info_dump = NULL; 1189 adapter->drv_info_size = 0; 1190 } 1191 } 1192 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump); 1193 1194 /* 1195 * CFG802.11 network device handler for statistics retrieval. 1196 */ 1197 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) 1198 { 1199 struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); 1200 1201 return &priv->stats; 1202 } 1203 1204 static u16 1205 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb, 1206 void *accel_priv, select_queue_fallback_t fallback) 1207 { 1208 skb->priority = cfg80211_classify8021d(skb, NULL); 1209 return mwifiex_1d_to_wmm_queue[skb->priority]; 1210 } 1211 1212 /* Network device handlers */ 1213 static const struct net_device_ops mwifiex_netdev_ops = { 1214 .ndo_open = mwifiex_open, 1215 .ndo_stop = mwifiex_close, 1216 .ndo_start_xmit = mwifiex_hard_start_xmit, 1217 .ndo_set_mac_address = mwifiex_set_mac_address, 1218 .ndo_validate_addr = eth_validate_addr, 1219 .ndo_tx_timeout = mwifiex_tx_timeout, 1220 .ndo_get_stats = mwifiex_get_stats, 1221 .ndo_set_rx_mode = mwifiex_set_multicast_list, 1222 .ndo_select_queue = mwifiex_netdev_select_wmm_queue, 1223 }; 1224 1225 /* 1226 * This function initializes the private structure parameters. 1227 * 1228 * The following wait queues are initialized - 1229 * - IOCTL wait queue 1230 * - Command wait queue 1231 * - Statistics wait queue 1232 * 1233 * ...and the following default parameters are set - 1234 * - Current key index : Set to 0 1235 * - Rate index : Set to auto 1236 * - Media connected : Set to disconnected 1237 * - Adhoc link sensed : Set to false 1238 * - Nick name : Set to null 1239 * - Number of Tx timeout : Set to 0 1240 * - Device address : Set to current address 1241 * - Rx histogram statistc : Set to 0 1242 * 1243 * In addition, the CFG80211 work queue is also created. 1244 */ 1245 void mwifiex_init_priv_params(struct mwifiex_private *priv, 1246 struct net_device *dev) 1247 { 1248 dev->netdev_ops = &mwifiex_netdev_ops; 1249 dev->destructor = free_netdev; 1250 /* Initialize private structure */ 1251 priv->current_key_index = 0; 1252 priv->media_connected = false; 1253 memset(priv->mgmt_ie, 0, 1254 sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX); 1255 priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK; 1256 priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK; 1257 priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK; 1258 priv->gen_idx = MWIFIEX_AUTO_IDX_MASK; 1259 priv->num_tx_timeout = 0; 1260 ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr); 1261 memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); 1262 1263 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA || 1264 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { 1265 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL); 1266 if (priv->hist_data) 1267 mwifiex_hist_data_reset(priv); 1268 } 1269 } 1270 1271 /* 1272 * This function check if command is pending. 1273 */ 1274 int is_command_pending(struct mwifiex_adapter *adapter) 1275 { 1276 unsigned long flags; 1277 int is_cmd_pend_q_empty; 1278 1279 spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); 1280 is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); 1281 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); 1282 1283 return !is_cmd_pend_q_empty; 1284 } 1285 1286 /* 1287 * This is the RX work queue function. 1288 * 1289 * It handles the RX operations. 1290 */ 1291 static void mwifiex_rx_work_queue(struct work_struct *work) 1292 { 1293 struct mwifiex_adapter *adapter = 1294 container_of(work, struct mwifiex_adapter, rx_work); 1295 1296 if (adapter->surprise_removed) 1297 return; 1298 mwifiex_process_rx(adapter); 1299 } 1300 1301 /* 1302 * This is the main work queue function. 1303 * 1304 * It handles the main process, which in turn handles the complete 1305 * driver operations. 1306 */ 1307 static void mwifiex_main_work_queue(struct work_struct *work) 1308 { 1309 struct mwifiex_adapter *adapter = 1310 container_of(work, struct mwifiex_adapter, main_work); 1311 1312 if (adapter->surprise_removed) 1313 return; 1314 mwifiex_main_process(adapter); 1315 } 1316 1317 /* 1318 * This function adds the card. 1319 * 1320 * This function follows the following major steps to set up the device - 1321 * - Initialize software. This includes probing the card, registering 1322 * the interface operations table, and allocating/initializing the 1323 * adapter structure 1324 * - Set up the netlink socket 1325 * - Create and start the main work queue 1326 * - Register the device 1327 * - Initialize firmware and hardware 1328 * - Add logical interfaces 1329 */ 1330 int 1331 mwifiex_add_card(void *card, struct semaphore *sem, 1332 struct mwifiex_if_ops *if_ops, u8 iface_type) 1333 { 1334 struct mwifiex_adapter *adapter; 1335 1336 if (down_interruptible(sem)) 1337 goto exit_sem_err; 1338 1339 if (mwifiex_register(card, if_ops, (void **)&adapter)) { 1340 pr_err("%s: software init failed\n", __func__); 1341 goto err_init_sw; 1342 } 1343 1344 adapter->iface_type = iface_type; 1345 adapter->card_sem = sem; 1346 1347 adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; 1348 adapter->surprise_removed = false; 1349 init_waitqueue_head(&adapter->init_wait_q); 1350 adapter->is_suspended = false; 1351 adapter->hs_activated = false; 1352 init_waitqueue_head(&adapter->hs_activate_wait_q); 1353 init_waitqueue_head(&adapter->cmd_wait_q.wait); 1354 adapter->cmd_wait_q.status = 0; 1355 adapter->scan_wait_q_woken = false; 1356 1357 if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) { 1358 adapter->rx_work_enabled = true; 1359 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus()); 1360 } 1361 1362 adapter->workqueue = 1363 alloc_workqueue("MWIFIEX_WORK_QUEUE", 1364 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 1365 if (!adapter->workqueue) 1366 goto err_kmalloc; 1367 1368 INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); 1369 1370 if (adapter->rx_work_enabled) { 1371 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE", 1372 WQ_HIGHPRI | 1373 WQ_MEM_RECLAIM | 1374 WQ_UNBOUND, 1); 1375 if (!adapter->rx_workqueue) 1376 goto err_kmalloc; 1377 1378 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue); 1379 } 1380 1381 /* Register the device. Fill up the private data structure with relevant 1382 information from the card. */ 1383 if (adapter->if_ops.register_dev(adapter)) { 1384 pr_err("%s: failed to register mwifiex device\n", __func__); 1385 goto err_registerdev; 1386 } 1387 1388 if (mwifiex_init_hw_fw(adapter)) { 1389 pr_err("%s: firmware init failed\n", __func__); 1390 goto err_init_fw; 1391 } 1392 1393 return 0; 1394 1395 err_init_fw: 1396 pr_debug("info: %s: unregister device\n", __func__); 1397 if (adapter->if_ops.unregister_dev) 1398 adapter->if_ops.unregister_dev(adapter); 1399 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { 1400 pr_debug("info: %s: shutdown mwifiex\n", __func__); 1401 adapter->init_wait_q_woken = false; 1402 1403 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) 1404 wait_event_interruptible(adapter->init_wait_q, 1405 adapter->init_wait_q_woken); 1406 } 1407 err_registerdev: 1408 adapter->surprise_removed = true; 1409 mwifiex_terminate_workqueue(adapter); 1410 err_kmalloc: 1411 mwifiex_free_adapter(adapter); 1412 1413 err_init_sw: 1414 up(sem); 1415 1416 exit_sem_err: 1417 return -1; 1418 } 1419 EXPORT_SYMBOL_GPL(mwifiex_add_card); 1420 1421 /* 1422 * This function removes the card. 1423 * 1424 * This function follows the following major steps to remove the device - 1425 * - Stop data traffic 1426 * - Shutdown firmware 1427 * - Remove the logical interfaces 1428 * - Terminate the work queue 1429 * - Unregister the device 1430 * - Free the adapter structure 1431 */ 1432 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) 1433 { 1434 struct mwifiex_private *priv = NULL; 1435 int i; 1436 1437 if (down_trylock(sem)) 1438 goto exit_sem_err; 1439 1440 if (!adapter) 1441 goto exit_remove; 1442 1443 /* We can no longer handle interrupts once we start doing the teardown 1444 * below. */ 1445 if (adapter->if_ops.disable_int) 1446 adapter->if_ops.disable_int(adapter); 1447 1448 adapter->surprise_removed = true; 1449 1450 mwifiex_terminate_workqueue(adapter); 1451 1452 /* Stop data */ 1453 for (i = 0; i < adapter->priv_num; i++) { 1454 priv = adapter->priv[i]; 1455 if (priv && priv->netdev) { 1456 mwifiex_stop_net_dev_queue(priv->netdev, adapter); 1457 if (netif_carrier_ok(priv->netdev)) 1458 netif_carrier_off(priv->netdev); 1459 } 1460 } 1461 1462 mwifiex_dbg(adapter, CMD, 1463 "cmd: calling mwifiex_shutdown_drv...\n"); 1464 adapter->init_wait_q_woken = false; 1465 1466 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) 1467 wait_event_interruptible(adapter->init_wait_q, 1468 adapter->init_wait_q_woken); 1469 mwifiex_dbg(adapter, CMD, 1470 "cmd: mwifiex_shutdown_drv done\n"); 1471 if (atomic_read(&adapter->rx_pending) || 1472 atomic_read(&adapter->tx_pending) || 1473 atomic_read(&adapter->cmd_pending)) { 1474 mwifiex_dbg(adapter, ERROR, 1475 "rx_pending=%d, tx_pending=%d,\t" 1476 "cmd_pending=%d\n", 1477 atomic_read(&adapter->rx_pending), 1478 atomic_read(&adapter->tx_pending), 1479 atomic_read(&adapter->cmd_pending)); 1480 } 1481 1482 for (i = 0; i < adapter->priv_num; i++) { 1483 priv = adapter->priv[i]; 1484 1485 if (!priv) 1486 continue; 1487 1488 rtnl_lock(); 1489 if (priv->netdev && 1490 priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED) 1491 mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev); 1492 rtnl_unlock(); 1493 } 1494 1495 wiphy_unregister(adapter->wiphy); 1496 wiphy_free(adapter->wiphy); 1497 1498 /* Unregister device */ 1499 mwifiex_dbg(adapter, INFO, 1500 "info: unregister device\n"); 1501 if (adapter->if_ops.unregister_dev) 1502 adapter->if_ops.unregister_dev(adapter); 1503 /* Free adapter structure */ 1504 mwifiex_dbg(adapter, INFO, 1505 "info: free adapter\n"); 1506 mwifiex_free_adapter(adapter); 1507 1508 exit_remove: 1509 up(sem); 1510 exit_sem_err: 1511 return 0; 1512 } 1513 EXPORT_SYMBOL_GPL(mwifiex_remove_card); 1514 1515 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask, 1516 const char *fmt, ...) 1517 { 1518 struct va_format vaf; 1519 va_list args; 1520 1521 if (!adapter->dev || !(adapter->debug_mask & mask)) 1522 return; 1523 1524 va_start(args, fmt); 1525 1526 vaf.fmt = fmt; 1527 vaf.va = &args; 1528 1529 dev_info(adapter->dev, "%pV", &vaf); 1530 1531 va_end(args); 1532 } 1533 EXPORT_SYMBOL_GPL(_mwifiex_dbg); 1534 1535 /* 1536 * This function initializes the module. 1537 * 1538 * The debug FS is also initialized if configured. 1539 */ 1540 static int 1541 mwifiex_init_module(void) 1542 { 1543 #ifdef CONFIG_DEBUG_FS 1544 mwifiex_debugfs_init(); 1545 #endif 1546 return 0; 1547 } 1548 1549 /* 1550 * This function cleans up the module. 1551 * 1552 * The debug FS is removed if available. 1553 */ 1554 static void 1555 mwifiex_cleanup_module(void) 1556 { 1557 #ifdef CONFIG_DEBUG_FS 1558 mwifiex_debugfs_remove(); 1559 #endif 1560 } 1561 1562 module_init(mwifiex_init_module); 1563 module_exit(mwifiex_cleanup_module); 1564 1565 MODULE_AUTHOR("Marvell International Ltd."); 1566 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); 1567 MODULE_VERSION(VERSION); 1568 MODULE_LICENSE("GPL v2"); 1569