1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This file contains the major functions in WLAN 4 * driver. It includes init, exit, open, close and main 5 * thread etc.. 6 */ 7 8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 9 10 #include <linux/module.h> 11 #include <linux/delay.h> 12 #include <linux/etherdevice.h> 13 #include <linux/hardirq.h> 14 #include <linux/netdevice.h> 15 #include <linux/if_arp.h> 16 #include <linux/kthread.h> 17 #include <linux/kfifo.h> 18 #include <linux/slab.h> 19 #include <net/cfg80211.h> 20 21 #include "host.h" 22 #include "decl.h" 23 #include "dev.h" 24 #include "cfg.h" 25 #include "debugfs.h" 26 #include "cmd.h" 27 #include "mesh.h" 28 29 #define DRIVER_RELEASE_VERSION "323.p0" 30 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION 31 #ifdef DEBUG 32 "-dbg" 33 #endif 34 ""; 35 36 37 /* Module parameters */ 38 unsigned int lbs_debug; 39 EXPORT_SYMBOL_GPL(lbs_debug); 40 module_param_named(libertas_debug, lbs_debug, int, 0644); 41 42 static unsigned int lbs_disablemesh; 43 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644); 44 45 46 /* 47 * This global structure is used to send the confirm_sleep command as 48 * fast as possible down to the firmware. 49 */ 50 struct cmd_confirm_sleep confirm_sleep; 51 52 53 /* 54 * the table to keep region code 55 */ 56 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] = 57 { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 }; 58 59 /* 60 * FW rate table. FW refers to rates by their index in this table, not by the 61 * rate value itself. Values of 0x00 are 62 * reserved positions. 63 */ 64 static u8 fw_data_rates[MAX_RATES] = 65 { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12, 66 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00 67 }; 68 69 /** 70 * lbs_fw_index_to_data_rate - use index to get the data rate 71 * 72 * @idx: The index of data rate 73 * returns: data rate or 0 74 */ 75 u32 lbs_fw_index_to_data_rate(u8 idx) 76 { 77 if (idx >= sizeof(fw_data_rates)) 78 idx = 0; 79 return fw_data_rates[idx]; 80 } 81 82 /** 83 * lbs_data_rate_to_fw_index - use rate to get the index 84 * 85 * @rate: data rate 86 * returns: index or 0 87 */ 88 u8 lbs_data_rate_to_fw_index(u32 rate) 89 { 90 u8 i; 91 92 if (!rate) 93 return 0; 94 95 for (i = 0; i < sizeof(fw_data_rates); i++) { 96 if (rate == fw_data_rates[i]) 97 return i; 98 } 99 return 0; 100 } 101 102 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type) 103 { 104 int ret = 0; 105 106 switch (type) { 107 case NL80211_IFTYPE_MONITOR: 108 ret = lbs_set_monitor_mode(priv, 1); 109 break; 110 case NL80211_IFTYPE_STATION: 111 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) 112 ret = lbs_set_monitor_mode(priv, 0); 113 if (!ret) 114 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1); 115 break; 116 case NL80211_IFTYPE_ADHOC: 117 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) 118 ret = lbs_set_monitor_mode(priv, 0); 119 if (!ret) 120 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2); 121 break; 122 default: 123 ret = -ENOTSUPP; 124 } 125 return ret; 126 } 127 128 int lbs_start_iface(struct lbs_private *priv) 129 { 130 struct cmd_ds_802_11_mac_address cmd; 131 int ret; 132 133 if (priv->power_restore) { 134 ret = priv->power_restore(priv); 135 if (ret) 136 return ret; 137 } 138 139 cmd.hdr.size = cpu_to_le16(sizeof(cmd)); 140 cmd.action = cpu_to_le16(CMD_ACT_SET); 141 memcpy(cmd.macadd, priv->current_addr, ETH_ALEN); 142 143 ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd); 144 if (ret) { 145 lbs_deb_net("set MAC address failed\n"); 146 goto err; 147 } 148 149 ret = lbs_set_iface_type(priv, priv->wdev->iftype); 150 if (ret) { 151 lbs_deb_net("set iface type failed\n"); 152 goto err; 153 } 154 155 ret = lbs_set_11d_domain_info(priv); 156 if (ret) { 157 lbs_deb_net("set 11d domain info failed\n"); 158 goto err; 159 } 160 161 lbs_update_channel(priv); 162 163 priv->iface_running = true; 164 return 0; 165 166 err: 167 if (priv->power_save) 168 priv->power_save(priv); 169 return ret; 170 } 171 172 /** 173 * lbs_dev_open - open the ethX interface 174 * 175 * @dev: A pointer to &net_device structure 176 * returns: 0 or -EBUSY if monitor mode active 177 */ 178 static int lbs_dev_open(struct net_device *dev) 179 { 180 struct lbs_private *priv = dev->ml_priv; 181 int ret = 0; 182 183 if (!priv->iface_running) { 184 ret = lbs_start_iface(priv); 185 if (ret) 186 goto out; 187 } 188 189 spin_lock_irq(&priv->driver_lock); 190 191 netif_carrier_off(dev); 192 193 if (!priv->tx_pending_len) 194 netif_wake_queue(dev); 195 196 spin_unlock_irq(&priv->driver_lock); 197 198 out: 199 return ret; 200 } 201 202 static bool lbs_command_queue_empty(struct lbs_private *priv) 203 { 204 unsigned long flags; 205 bool ret; 206 spin_lock_irqsave(&priv->driver_lock, flags); 207 ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq); 208 spin_unlock_irqrestore(&priv->driver_lock, flags); 209 return ret; 210 } 211 212 int lbs_stop_iface(struct lbs_private *priv) 213 { 214 unsigned long flags; 215 int ret = 0; 216 217 spin_lock_irqsave(&priv->driver_lock, flags); 218 priv->iface_running = false; 219 kfree_skb(priv->currenttxskb); 220 priv->currenttxskb = NULL; 221 priv->tx_pending_len = 0; 222 spin_unlock_irqrestore(&priv->driver_lock, flags); 223 224 cancel_work_sync(&priv->mcast_work); 225 del_timer_sync(&priv->tx_lockup_timer); 226 227 /* Disable command processing, and wait for all commands to complete */ 228 lbs_deb_main("waiting for commands to complete\n"); 229 wait_event(priv->waitq, lbs_command_queue_empty(priv)); 230 lbs_deb_main("all commands completed\n"); 231 232 if (priv->power_save) 233 ret = priv->power_save(priv); 234 235 return ret; 236 } 237 238 /** 239 * lbs_eth_stop - close the ethX interface 240 * 241 * @dev: A pointer to &net_device structure 242 * returns: 0 243 */ 244 static int lbs_eth_stop(struct net_device *dev) 245 { 246 struct lbs_private *priv = dev->ml_priv; 247 248 if (priv->connect_status == LBS_CONNECTED) 249 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING); 250 251 spin_lock_irq(&priv->driver_lock); 252 netif_stop_queue(dev); 253 spin_unlock_irq(&priv->driver_lock); 254 255 lbs_update_mcast(priv); 256 cancel_delayed_work_sync(&priv->scan_work); 257 if (priv->scan_req) 258 lbs_scan_done(priv); 259 260 netif_carrier_off(priv->dev); 261 262 if (!lbs_iface_active(priv)) 263 lbs_stop_iface(priv); 264 265 return 0; 266 } 267 268 void lbs_host_to_card_done(struct lbs_private *priv) 269 { 270 unsigned long flags; 271 272 spin_lock_irqsave(&priv->driver_lock, flags); 273 del_timer(&priv->tx_lockup_timer); 274 275 priv->dnld_sent = DNLD_RES_RECEIVED; 276 277 /* Wake main thread if commands are pending */ 278 if (!priv->cur_cmd || priv->tx_pending_len > 0) { 279 if (!priv->wakeup_dev_required) 280 wake_up(&priv->waitq); 281 } 282 283 spin_unlock_irqrestore(&priv->driver_lock, flags); 284 } 285 EXPORT_SYMBOL_GPL(lbs_host_to_card_done); 286 287 int lbs_set_mac_address(struct net_device *dev, void *addr) 288 { 289 int ret = 0; 290 struct lbs_private *priv = dev->ml_priv; 291 struct sockaddr *phwaddr = addr; 292 293 /* 294 * Can only set MAC address when all interfaces are down, to be written 295 * to the hardware when one of them is brought up. 296 */ 297 if (lbs_iface_active(priv)) 298 return -EBUSY; 299 300 /* In case it was called from the mesh device */ 301 dev = priv->dev; 302 303 memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN); 304 eth_hw_addr_set(dev, phwaddr->sa_data); 305 if (priv->mesh_dev) 306 eth_hw_addr_set(priv->mesh_dev, phwaddr->sa_data); 307 308 return ret; 309 } 310 311 312 static inline int mac_in_list(unsigned char *list, int list_len, 313 unsigned char *mac) 314 { 315 while (list_len) { 316 if (!memcmp(list, mac, ETH_ALEN)) 317 return 1; 318 list += ETH_ALEN; 319 list_len--; 320 } 321 return 0; 322 } 323 324 325 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd, 326 struct net_device *dev, int nr_addrs) 327 { 328 int i = nr_addrs; 329 struct netdev_hw_addr *ha; 330 int cnt; 331 332 if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST)) 333 return nr_addrs; 334 335 netif_addr_lock_bh(dev); 336 cnt = netdev_mc_count(dev); 337 netdev_for_each_mc_addr(ha, dev) { 338 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) { 339 lbs_deb_net("mcast address %s:%pM skipped\n", dev->name, 340 ha->addr); 341 cnt--; 342 continue; 343 } 344 345 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE) 346 break; 347 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN); 348 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name, 349 ha->addr); 350 i++; 351 cnt--; 352 } 353 netif_addr_unlock_bh(dev); 354 if (cnt) 355 return -EOVERFLOW; 356 357 return i; 358 } 359 360 void lbs_update_mcast(struct lbs_private *priv) 361 { 362 struct cmd_ds_mac_multicast_adr mcast_cmd; 363 int dev_flags = 0; 364 int nr_addrs; 365 int old_mac_control = priv->mac_control; 366 367 if (netif_running(priv->dev)) 368 dev_flags |= priv->dev->flags; 369 if (priv->mesh_dev && netif_running(priv->mesh_dev)) 370 dev_flags |= priv->mesh_dev->flags; 371 372 if (dev_flags & IFF_PROMISC) { 373 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE; 374 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE | 375 CMD_ACT_MAC_MULTICAST_ENABLE); 376 goto out_set_mac_control; 377 } else if (dev_flags & IFF_ALLMULTI) { 378 do_allmulti: 379 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE; 380 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | 381 CMD_ACT_MAC_MULTICAST_ENABLE); 382 goto out_set_mac_control; 383 } 384 385 /* Once for priv->dev, again for priv->mesh_dev if it exists */ 386 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0); 387 if (nr_addrs >= 0 && priv->mesh_dev) 388 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs); 389 if (nr_addrs < 0) 390 goto do_allmulti; 391 392 if (nr_addrs) { 393 int size = offsetof(struct cmd_ds_mac_multicast_adr, 394 maclist[6*nr_addrs]); 395 396 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET); 397 mcast_cmd.hdr.size = cpu_to_le16(size); 398 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs); 399 400 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size); 401 402 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE; 403 } else 404 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE; 405 406 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | 407 CMD_ACT_MAC_ALL_MULTICAST_ENABLE); 408 out_set_mac_control: 409 if (priv->mac_control != old_mac_control) 410 lbs_set_mac_control(priv); 411 } 412 413 static void lbs_set_mcast_worker(struct work_struct *work) 414 { 415 struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work); 416 lbs_update_mcast(priv); 417 } 418 419 void lbs_set_multicast_list(struct net_device *dev) 420 { 421 struct lbs_private *priv = dev->ml_priv; 422 423 schedule_work(&priv->mcast_work); 424 } 425 426 /** 427 * lbs_thread - handles the major jobs in the LBS driver. 428 * It handles all events generated by firmware, RX data received 429 * from firmware and TX data sent from kernel. 430 * 431 * @data: A pointer to &lbs_thread structure 432 * returns: 0 433 */ 434 static int lbs_thread(void *data) 435 { 436 struct net_device *dev = data; 437 struct lbs_private *priv = dev->ml_priv; 438 wait_queue_entry_t wait; 439 440 init_waitqueue_entry(&wait, current); 441 442 for (;;) { 443 int shouldsleep; 444 u8 resp_idx; 445 446 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n", 447 priv->currenttxskb, priv->dnld_sent); 448 449 add_wait_queue(&priv->waitq, &wait); 450 set_current_state(TASK_INTERRUPTIBLE); 451 spin_lock_irq(&priv->driver_lock); 452 453 if (kthread_should_stop()) 454 shouldsleep = 0; /* Bye */ 455 else if (priv->surpriseremoved) 456 shouldsleep = 1; /* We need to wait until we're _told_ to die */ 457 else if (priv->psstate == PS_STATE_SLEEP) 458 shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */ 459 else if (priv->cmd_timed_out) 460 shouldsleep = 0; /* Command timed out. Recover */ 461 else if (!priv->fw_ready) 462 shouldsleep = 1; /* Firmware not ready. We're waiting for it */ 463 else if (priv->dnld_sent) 464 shouldsleep = 1; /* Something is en route to the device already */ 465 else if (priv->tx_pending_len > 0) 466 shouldsleep = 0; /* We've a packet to send */ 467 else if (priv->resp_len[priv->resp_idx]) 468 shouldsleep = 0; /* We have a command response */ 469 else if (priv->cur_cmd) 470 shouldsleep = 1; /* Can't send a command; one already running */ 471 else if (!list_empty(&priv->cmdpendingq) && 472 !(priv->wakeup_dev_required)) 473 shouldsleep = 0; /* We have a command to send */ 474 else if (kfifo_len(&priv->event_fifo)) 475 shouldsleep = 0; /* We have an event to process */ 476 else 477 shouldsleep = 1; /* No command */ 478 479 if (shouldsleep) { 480 lbs_deb_thread("sleeping, connect_status %d, " 481 "psmode %d, psstate %d\n", 482 priv->connect_status, 483 priv->psmode, priv->psstate); 484 spin_unlock_irq(&priv->driver_lock); 485 schedule(); 486 } else 487 spin_unlock_irq(&priv->driver_lock); 488 489 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n", 490 priv->currenttxskb, priv->dnld_sent); 491 492 set_current_state(TASK_RUNNING); 493 remove_wait_queue(&priv->waitq, &wait); 494 495 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n", 496 priv->currenttxskb, priv->dnld_sent); 497 498 if (kthread_should_stop()) { 499 lbs_deb_thread("break from main thread\n"); 500 break; 501 } 502 503 if (priv->surpriseremoved) { 504 lbs_deb_thread("adapter removed; waiting to die...\n"); 505 continue; 506 } 507 508 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n", 509 priv->currenttxskb, priv->dnld_sent); 510 511 /* Process any pending command response */ 512 spin_lock_irq(&priv->driver_lock); 513 resp_idx = priv->resp_idx; 514 if (priv->resp_len[resp_idx]) { 515 spin_unlock_irq(&priv->driver_lock); 516 lbs_process_command_response(priv, 517 priv->resp_buf[resp_idx], 518 priv->resp_len[resp_idx]); 519 spin_lock_irq(&priv->driver_lock); 520 priv->resp_len[resp_idx] = 0; 521 } 522 spin_unlock_irq(&priv->driver_lock); 523 524 /* Process hardware events, e.g. card removed, link lost */ 525 spin_lock_irq(&priv->driver_lock); 526 while (kfifo_len(&priv->event_fifo)) { 527 u32 event; 528 529 if (kfifo_out(&priv->event_fifo, 530 (unsigned char *) &event, sizeof(event)) != 531 sizeof(event)) 532 break; 533 spin_unlock_irq(&priv->driver_lock); 534 lbs_process_event(priv, event); 535 spin_lock_irq(&priv->driver_lock); 536 } 537 spin_unlock_irq(&priv->driver_lock); 538 539 if (priv->wakeup_dev_required) { 540 lbs_deb_thread("Waking up device...\n"); 541 /* Wake up device */ 542 if (priv->exit_deep_sleep(priv)) 543 lbs_deb_thread("Wakeup device failed\n"); 544 continue; 545 } 546 547 /* command timeout stuff */ 548 if (priv->cmd_timed_out && priv->cur_cmd) { 549 struct cmd_ctrl_node *cmdnode = priv->cur_cmd; 550 551 netdev_info(dev, "Timeout submitting command 0x%04x\n", 552 le16_to_cpu(cmdnode->cmdbuf->command)); 553 lbs_complete_command(priv, cmdnode, -ETIMEDOUT); 554 555 /* Reset card, but only when it isn't in the process 556 * of being shutdown anyway. */ 557 if (!dev->dismantle && priv->reset_card) 558 priv->reset_card(priv); 559 } 560 priv->cmd_timed_out = 0; 561 562 if (!priv->fw_ready) 563 continue; 564 565 /* Check if we need to confirm Sleep Request received previously */ 566 if (priv->psstate == PS_STATE_PRE_SLEEP && 567 !priv->dnld_sent && !priv->cur_cmd) { 568 if (priv->connect_status == LBS_CONNECTED) { 569 lbs_deb_thread("pre-sleep, currenttxskb %p, " 570 "dnld_sent %d, cur_cmd %p\n", 571 priv->currenttxskb, priv->dnld_sent, 572 priv->cur_cmd); 573 574 lbs_ps_confirm_sleep(priv); 575 } else { 576 /* workaround for firmware sending 577 * deauth/linkloss event immediately 578 * after sleep request; remove this 579 * after firmware fixes it 580 */ 581 priv->psstate = PS_STATE_AWAKE; 582 netdev_alert(dev, 583 "ignore PS_SleepConfirm in non-connected state\n"); 584 } 585 } 586 587 /* The PS state is changed during processing of Sleep Request 588 * event above 589 */ 590 if ((priv->psstate == PS_STATE_SLEEP) || 591 (priv->psstate == PS_STATE_PRE_SLEEP)) 592 continue; 593 594 if (priv->is_deep_sleep) 595 continue; 596 597 /* Execute the next command */ 598 if (!priv->dnld_sent && !priv->cur_cmd) 599 lbs_execute_next_command(priv); 600 601 spin_lock_irq(&priv->driver_lock); 602 if (!priv->dnld_sent && priv->tx_pending_len > 0) { 603 int ret = priv->hw_host_to_card(priv, MVMS_DAT, 604 priv->tx_pending_buf, 605 priv->tx_pending_len); 606 if (ret) { 607 lbs_deb_tx("host_to_card failed %d\n", ret); 608 priv->dnld_sent = DNLD_RES_RECEIVED; 609 } else { 610 mod_timer(&priv->tx_lockup_timer, 611 jiffies + (HZ * 5)); 612 } 613 priv->tx_pending_len = 0; 614 if (!priv->currenttxskb) { 615 /* We can wake the queues immediately if we aren't 616 waiting for TX feedback */ 617 if (priv->connect_status == LBS_CONNECTED) 618 netif_wake_queue(priv->dev); 619 if (priv->mesh_dev && 620 netif_running(priv->mesh_dev)) 621 netif_wake_queue(priv->mesh_dev); 622 } 623 } 624 spin_unlock_irq(&priv->driver_lock); 625 } 626 627 del_timer(&priv->command_timer); 628 del_timer(&priv->tx_lockup_timer); 629 del_timer(&priv->auto_deepsleep_timer); 630 631 return 0; 632 } 633 634 /** 635 * lbs_setup_firmware - gets the HW spec from the firmware and sets 636 * some basic parameters 637 * 638 * @priv: A pointer to &struct lbs_private structure 639 * returns: 0 or -1 640 */ 641 static int lbs_setup_firmware(struct lbs_private *priv) 642 { 643 int ret = -1; 644 s16 curlevel = 0, minlevel = 0, maxlevel = 0; 645 646 /* Read MAC address from firmware */ 647 eth_broadcast_addr(priv->current_addr); 648 ret = lbs_update_hw_spec(priv); 649 if (ret) 650 goto done; 651 652 /* Read power levels if available */ 653 ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel); 654 if (ret == 0) { 655 priv->txpower_cur = curlevel; 656 priv->txpower_min = minlevel; 657 priv->txpower_max = maxlevel; 658 } 659 660 /* Send cmd to FW to enable 11D function */ 661 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1); 662 if (ret) 663 goto done; 664 665 ret = lbs_set_mac_control_sync(priv); 666 done: 667 return ret; 668 } 669 670 int lbs_suspend(struct lbs_private *priv) 671 { 672 int ret; 673 674 if (priv->is_deep_sleep) { 675 ret = lbs_set_deep_sleep(priv, 0); 676 if (ret) { 677 netdev_err(priv->dev, 678 "deep sleep cancellation failed: %d\n", ret); 679 return ret; 680 } 681 priv->deep_sleep_required = 1; 682 } 683 684 ret = lbs_set_host_sleep(priv, 1); 685 686 netif_device_detach(priv->dev); 687 if (priv->mesh_dev) 688 netif_device_detach(priv->mesh_dev); 689 690 return ret; 691 } 692 EXPORT_SYMBOL_GPL(lbs_suspend); 693 694 int lbs_resume(struct lbs_private *priv) 695 { 696 int ret; 697 698 ret = lbs_set_host_sleep(priv, 0); 699 700 netif_device_attach(priv->dev); 701 if (priv->mesh_dev) 702 netif_device_attach(priv->mesh_dev); 703 704 if (priv->deep_sleep_required) { 705 priv->deep_sleep_required = 0; 706 ret = lbs_set_deep_sleep(priv, 1); 707 if (ret) 708 netdev_err(priv->dev, 709 "deep sleep activation failed: %d\n", ret); 710 } 711 712 if (priv->setup_fw_on_resume) 713 ret = lbs_setup_firmware(priv); 714 715 return ret; 716 } 717 EXPORT_SYMBOL_GPL(lbs_resume); 718 719 /** 720 * lbs_cmd_timeout_handler - handles the timeout of command sending. 721 * It will re-send the same command again. 722 * 723 * @t: Context from which to retrieve a &struct lbs_private pointer 724 */ 725 static void lbs_cmd_timeout_handler(struct timer_list *t) 726 { 727 struct lbs_private *priv = from_timer(priv, t, command_timer); 728 unsigned long flags; 729 730 spin_lock_irqsave(&priv->driver_lock, flags); 731 732 if (!priv->cur_cmd) 733 goto out; 734 735 netdev_info(priv->dev, "command 0x%04x timed out\n", 736 le16_to_cpu(priv->cur_cmd->cmdbuf->command)); 737 738 priv->cmd_timed_out = 1; 739 740 /* 741 * If the device didn't even acknowledge the command, reset the state 742 * so that we don't block all future commands due to this one timeout. 743 */ 744 if (priv->dnld_sent == DNLD_CMD_SENT) 745 priv->dnld_sent = DNLD_RES_RECEIVED; 746 747 wake_up(&priv->waitq); 748 out: 749 spin_unlock_irqrestore(&priv->driver_lock, flags); 750 } 751 752 /** 753 * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames 754 * to the hardware. This is known to frequently happen with SD8686 when 755 * waking up after a Wake-on-WLAN-triggered resume. 756 * 757 * @t: Context from which to retrieve a &struct lbs_private pointer 758 */ 759 static void lbs_tx_lockup_handler(struct timer_list *t) 760 { 761 struct lbs_private *priv = from_timer(priv, t, tx_lockup_timer); 762 unsigned long flags; 763 764 spin_lock_irqsave(&priv->driver_lock, flags); 765 766 netdev_info(priv->dev, "TX lockup detected\n"); 767 if (priv->reset_card) 768 priv->reset_card(priv); 769 770 priv->dnld_sent = DNLD_RES_RECEIVED; 771 wake_up_interruptible(&priv->waitq); 772 773 spin_unlock_irqrestore(&priv->driver_lock, flags); 774 } 775 776 /** 777 * auto_deepsleep_timer_fn - put the device back to deep sleep mode when 778 * timer expires and no activity (command, event, data etc.) is detected. 779 * @t: Context from which to retrieve a &struct lbs_private pointer 780 * returns: N/A 781 */ 782 static void auto_deepsleep_timer_fn(struct timer_list *t) 783 { 784 struct lbs_private *priv = from_timer(priv, t, auto_deepsleep_timer); 785 786 if (priv->is_activity_detected) { 787 priv->is_activity_detected = 0; 788 } else { 789 if (priv->is_auto_deep_sleep_enabled && 790 (!priv->wakeup_dev_required) && 791 (priv->connect_status != LBS_CONNECTED)) { 792 struct cmd_header cmd; 793 794 lbs_deb_main("Entering auto deep sleep mode...\n"); 795 memset(&cmd, 0, sizeof(cmd)); 796 cmd.size = cpu_to_le16(sizeof(cmd)); 797 lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd, 798 sizeof(cmd)); 799 } 800 } 801 mod_timer(&priv->auto_deepsleep_timer , jiffies + 802 (priv->auto_deep_sleep_timeout * HZ)/1000); 803 } 804 805 int lbs_enter_auto_deep_sleep(struct lbs_private *priv) 806 { 807 priv->is_auto_deep_sleep_enabled = 1; 808 if (priv->is_deep_sleep) 809 priv->wakeup_dev_required = 1; 810 mod_timer(&priv->auto_deepsleep_timer , 811 jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000); 812 813 return 0; 814 } 815 816 int lbs_exit_auto_deep_sleep(struct lbs_private *priv) 817 { 818 priv->is_auto_deep_sleep_enabled = 0; 819 priv->auto_deep_sleep_timeout = 0; 820 del_timer(&priv->auto_deepsleep_timer); 821 822 return 0; 823 } 824 825 static int lbs_init_adapter(struct lbs_private *priv) 826 { 827 int ret; 828 829 eth_broadcast_addr(priv->current_addr); 830 831 priv->connect_status = LBS_DISCONNECTED; 832 priv->channel = DEFAULT_AD_HOC_CHANNEL; 833 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON; 834 priv->radio_on = 1; 835 priv->psmode = LBS802_11POWERMODECAM; 836 priv->psstate = PS_STATE_FULL_POWER; 837 priv->is_deep_sleep = 0; 838 priv->is_auto_deep_sleep_enabled = 0; 839 priv->deep_sleep_required = 0; 840 priv->wakeup_dev_required = 0; 841 init_waitqueue_head(&priv->ds_awake_q); 842 init_waitqueue_head(&priv->scan_q); 843 priv->authtype_auto = 1; 844 priv->is_host_sleep_configured = 0; 845 priv->is_host_sleep_activated = 0; 846 init_waitqueue_head(&priv->host_sleep_q); 847 init_waitqueue_head(&priv->fw_waitq); 848 mutex_init(&priv->lock); 849 850 timer_setup(&priv->command_timer, lbs_cmd_timeout_handler, 0); 851 timer_setup(&priv->tx_lockup_timer, lbs_tx_lockup_handler, 0); 852 timer_setup(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, 0); 853 854 INIT_LIST_HEAD(&priv->cmdfreeq); 855 INIT_LIST_HEAD(&priv->cmdpendingq); 856 857 spin_lock_init(&priv->driver_lock); 858 859 /* Allocate the command buffers */ 860 if (lbs_allocate_cmd_buffer(priv)) { 861 pr_err("Out of memory allocating command buffers\n"); 862 ret = -ENOMEM; 863 goto out; 864 } 865 priv->resp_idx = 0; 866 priv->resp_len[0] = priv->resp_len[1] = 0; 867 868 /* Create the event FIFO */ 869 ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL); 870 if (ret) { 871 pr_err("Out of memory allocating event FIFO buffer\n"); 872 goto out; 873 } 874 875 out: 876 return ret; 877 } 878 879 static void lbs_free_adapter(struct lbs_private *priv) 880 { 881 lbs_free_cmd_buffer(priv); 882 kfifo_free(&priv->event_fifo); 883 del_timer(&priv->command_timer); 884 del_timer(&priv->tx_lockup_timer); 885 del_timer(&priv->auto_deepsleep_timer); 886 } 887 888 static const struct net_device_ops lbs_netdev_ops = { 889 .ndo_open = lbs_dev_open, 890 .ndo_stop = lbs_eth_stop, 891 .ndo_start_xmit = lbs_hard_start_xmit, 892 .ndo_set_mac_address = lbs_set_mac_address, 893 .ndo_set_rx_mode = lbs_set_multicast_list, 894 .ndo_validate_addr = eth_validate_addr, 895 }; 896 897 /** 898 * lbs_add_card - adds the card. It will probe the 899 * card, allocate the lbs_priv and initialize the device. 900 * 901 * @card: A pointer to card 902 * @dmdev: A pointer to &struct device 903 * returns: A pointer to &struct lbs_private structure 904 */ 905 struct lbs_private *lbs_add_card(void *card, struct device *dmdev) 906 { 907 struct net_device *dev; 908 struct wireless_dev *wdev; 909 struct lbs_private *priv = NULL; 910 int err; 911 912 /* Allocate an Ethernet device and register it */ 913 wdev = lbs_cfg_alloc(dmdev); 914 if (IS_ERR(wdev)) { 915 err = PTR_ERR(wdev); 916 pr_err("cfg80211 init failed\n"); 917 goto err_cfg; 918 } 919 920 wdev->iftype = NL80211_IFTYPE_STATION; 921 priv = wdev_priv(wdev); 922 priv->wdev = wdev; 923 924 err = lbs_init_adapter(priv); 925 if (err) { 926 pr_err("failed to initialize adapter structure\n"); 927 goto err_wdev; 928 } 929 930 dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup); 931 if (!dev) { 932 err = -ENOMEM; 933 dev_err(dmdev, "no memory for network device instance\n"); 934 goto err_adapter; 935 } 936 937 dev->ieee80211_ptr = wdev; 938 dev->ml_priv = priv; 939 SET_NETDEV_DEV(dev, dmdev); 940 wdev->netdev = dev; 941 priv->dev = dev; 942 943 dev->netdev_ops = &lbs_netdev_ops; 944 dev->watchdog_timeo = 5 * HZ; 945 dev->ethtool_ops = &lbs_ethtool_ops; 946 dev->flags |= IFF_BROADCAST | IFF_MULTICAST; 947 948 priv->card = card; 949 950 strcpy(dev->name, "wlan%d"); 951 952 lbs_deb_thread("Starting main thread...\n"); 953 init_waitqueue_head(&priv->waitq); 954 priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main"); 955 if (IS_ERR(priv->main_thread)) { 956 err = PTR_ERR(priv->main_thread); 957 lbs_deb_thread("Error creating main thread.\n"); 958 goto err_ndev; 959 } 960 961 priv->work_thread = create_singlethread_workqueue("lbs_worker"); 962 INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker); 963 964 priv->wol_criteria = EHS_REMOVE_WAKEUP; 965 priv->wol_gpio = 0xff; 966 priv->wol_gap = 20; 967 priv->ehs_remove_supported = true; 968 969 return priv; 970 971 err_ndev: 972 free_netdev(dev); 973 974 err_adapter: 975 lbs_free_adapter(priv); 976 977 err_wdev: 978 lbs_cfg_free(priv); 979 980 err_cfg: 981 return ERR_PTR(err); 982 } 983 EXPORT_SYMBOL_GPL(lbs_add_card); 984 985 986 void lbs_remove_card(struct lbs_private *priv) 987 { 988 struct net_device *dev = priv->dev; 989 990 lbs_remove_mesh(priv); 991 992 if (priv->wiphy_registered) 993 lbs_scan_deinit(priv); 994 995 lbs_wait_for_firmware_load(priv); 996 997 /* worker thread destruction blocks on the in-flight command which 998 * should have been cleared already in lbs_stop_card(). 999 */ 1000 lbs_deb_main("destroying worker thread\n"); 1001 destroy_workqueue(priv->work_thread); 1002 lbs_deb_main("done destroying worker thread\n"); 1003 1004 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { 1005 priv->psmode = LBS802_11POWERMODECAM; 1006 /* no need to wakeup if already woken up, 1007 * on suspend, this exit ps command is not processed 1008 * the driver hangs 1009 */ 1010 if (priv->psstate != PS_STATE_FULL_POWER) 1011 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true); 1012 } 1013 1014 if (priv->is_deep_sleep) { 1015 priv->is_deep_sleep = 0; 1016 wake_up_interruptible(&priv->ds_awake_q); 1017 } 1018 1019 priv->is_host_sleep_configured = 0; 1020 priv->is_host_sleep_activated = 0; 1021 wake_up_interruptible(&priv->host_sleep_q); 1022 1023 /* Stop the thread servicing the interrupts */ 1024 priv->surpriseremoved = 1; 1025 kthread_stop(priv->main_thread); 1026 1027 lbs_free_adapter(priv); 1028 lbs_cfg_free(priv); 1029 free_netdev(dev); 1030 } 1031 EXPORT_SYMBOL_GPL(lbs_remove_card); 1032 1033 1034 int lbs_rtap_supported(struct lbs_private *priv) 1035 { 1036 if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) 1037 return 1; 1038 1039 /* newer firmware use a capability mask */ 1040 return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) && 1041 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)); 1042 } 1043 1044 1045 int lbs_start_card(struct lbs_private *priv) 1046 { 1047 struct net_device *dev = priv->dev; 1048 int ret; 1049 1050 /* poke the firmware */ 1051 ret = lbs_setup_firmware(priv); 1052 if (ret) 1053 goto done; 1054 1055 if (!lbs_disablemesh) 1056 lbs_init_mesh(priv); 1057 else 1058 pr_info("%s: mesh disabled\n", dev->name); 1059 1060 ret = lbs_cfg_register(priv); 1061 if (ret) { 1062 pr_err("cannot register device\n"); 1063 goto done; 1064 } 1065 1066 if (lbs_mesh_activated(priv)) 1067 lbs_start_mesh(priv); 1068 1069 lbs_debugfs_init_one(priv, dev); 1070 1071 netdev_info(dev, "Marvell WLAN 802.11 adapter\n"); 1072 1073 ret = 0; 1074 1075 done: 1076 return ret; 1077 } 1078 EXPORT_SYMBOL_GPL(lbs_start_card); 1079 1080 1081 void lbs_stop_card(struct lbs_private *priv) 1082 { 1083 struct net_device *dev; 1084 1085 if (!priv) 1086 return; 1087 dev = priv->dev; 1088 1089 /* If the netdev isn't registered, it means that lbs_start_card() was 1090 * never called so we have nothing to do here. */ 1091 if (dev->reg_state != NETREG_REGISTERED) 1092 return; 1093 1094 netif_stop_queue(dev); 1095 netif_carrier_off(dev); 1096 1097 lbs_debugfs_remove_one(priv); 1098 lbs_deinit_mesh(priv); 1099 unregister_netdev(dev); 1100 } 1101 EXPORT_SYMBOL_GPL(lbs_stop_card); 1102 1103 1104 void lbs_queue_event(struct lbs_private *priv, u32 event) 1105 { 1106 unsigned long flags; 1107 1108 spin_lock_irqsave(&priv->driver_lock, flags); 1109 1110 if (priv->psstate == PS_STATE_SLEEP) 1111 priv->psstate = PS_STATE_AWAKE; 1112 1113 kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32)); 1114 1115 wake_up(&priv->waitq); 1116 1117 spin_unlock_irqrestore(&priv->driver_lock, flags); 1118 } 1119 EXPORT_SYMBOL_GPL(lbs_queue_event); 1120 1121 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx) 1122 { 1123 if (priv->psstate == PS_STATE_SLEEP) 1124 priv->psstate = PS_STATE_AWAKE; 1125 1126 /* Swap buffers by flipping the response index */ 1127 BUG_ON(resp_idx > 1); 1128 priv->resp_idx = resp_idx; 1129 1130 wake_up(&priv->waitq); 1131 } 1132 EXPORT_SYMBOL_GPL(lbs_notify_command_response); 1133 1134 static int __init lbs_init_module(void) 1135 { 1136 memset(&confirm_sleep, 0, sizeof(confirm_sleep)); 1137 confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE); 1138 confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep)); 1139 confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED); 1140 lbs_debugfs_init(); 1141 1142 return 0; 1143 } 1144 1145 static void __exit lbs_exit_module(void) 1146 { 1147 lbs_debugfs_remove(); 1148 } 1149 1150 module_init(lbs_init_module); 1151 module_exit(lbs_exit_module); 1152 1153 MODULE_DESCRIPTION("Libertas WLAN Driver Library"); 1154 MODULE_AUTHOR("Marvell International Ltd."); 1155 MODULE_LICENSE("GPL"); 1156