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 unsigned int lbs_disablemesh;
43 EXPORT_SYMBOL_GPL(lbs_disablemesh);
44 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
45
46
47 /*
48 * This global structure is used to send the confirm_sleep command as
49 * fast as possible down to the firmware.
50 */
51 struct cmd_confirm_sleep confirm_sleep;
52
53
54 /*
55 * the table to keep region code
56 */
57 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
58 { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
59
60 /*
61 * FW rate table. FW refers to rates by their index in this table, not by the
62 * rate value itself. Values of 0x00 are
63 * reserved positions.
64 */
65 static u8 fw_data_rates[MAX_RATES] =
66 { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
67 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
68 };
69
70 /**
71 * lbs_fw_index_to_data_rate - use index to get the data rate
72 *
73 * @idx: The index of data rate
74 * returns: data rate or 0
75 */
lbs_fw_index_to_data_rate(u8 idx)76 u32 lbs_fw_index_to_data_rate(u8 idx)
77 {
78 if (idx >= sizeof(fw_data_rates))
79 idx = 0;
80 return fw_data_rates[idx];
81 }
82
83 /**
84 * lbs_data_rate_to_fw_index - use rate to get the index
85 *
86 * @rate: data rate
87 * returns: index or 0
88 */
lbs_data_rate_to_fw_index(u32 rate)89 u8 lbs_data_rate_to_fw_index(u32 rate)
90 {
91 u8 i;
92
93 if (!rate)
94 return 0;
95
96 for (i = 0; i < sizeof(fw_data_rates); i++) {
97 if (rate == fw_data_rates[i])
98 return i;
99 }
100 return 0;
101 }
102
lbs_set_iface_type(struct lbs_private * priv,enum nl80211_iftype type)103 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
104 {
105 int ret = 0;
106
107 switch (type) {
108 case NL80211_IFTYPE_MONITOR:
109 ret = lbs_set_monitor_mode(priv, 1);
110 break;
111 case NL80211_IFTYPE_STATION:
112 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
113 ret = lbs_set_monitor_mode(priv, 0);
114 if (!ret)
115 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
116 break;
117 case NL80211_IFTYPE_ADHOC:
118 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
119 ret = lbs_set_monitor_mode(priv, 0);
120 if (!ret)
121 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
122 break;
123 default:
124 ret = -ENOTSUPP;
125 }
126 return ret;
127 }
128
lbs_start_iface(struct lbs_private * priv)129 int lbs_start_iface(struct lbs_private *priv)
130 {
131 struct cmd_ds_802_11_mac_address cmd;
132 int ret;
133
134 if (priv->power_restore) {
135 ret = priv->power_restore(priv);
136 if (ret)
137 return ret;
138 }
139
140 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
141 cmd.action = cpu_to_le16(CMD_ACT_SET);
142 memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
143
144 ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
145 if (ret) {
146 lbs_deb_net("set MAC address failed\n");
147 goto err;
148 }
149
150 ret = lbs_set_iface_type(priv, priv->wdev->iftype);
151 if (ret) {
152 lbs_deb_net("set iface type failed\n");
153 goto err;
154 }
155
156 ret = lbs_set_11d_domain_info(priv);
157 if (ret) {
158 lbs_deb_net("set 11d domain info failed\n");
159 goto err;
160 }
161
162 lbs_update_channel(priv);
163
164 priv->iface_running = true;
165 return 0;
166
167 err:
168 if (priv->power_save)
169 priv->power_save(priv);
170 return ret;
171 }
172
173 /**
174 * lbs_dev_open - open the ethX interface
175 *
176 * @dev: A pointer to &net_device structure
177 * returns: 0 or -EBUSY if monitor mode active
178 */
lbs_dev_open(struct net_device * dev)179 static int lbs_dev_open(struct net_device *dev)
180 {
181 struct lbs_private *priv = dev->ml_priv;
182 int ret = 0;
183
184 if (!priv->iface_running) {
185 ret = lbs_start_iface(priv);
186 if (ret)
187 goto out;
188 }
189
190 spin_lock_irq(&priv->driver_lock);
191
192 netif_carrier_off(dev);
193
194 if (!priv->tx_pending_len)
195 netif_wake_queue(dev);
196
197 spin_unlock_irq(&priv->driver_lock);
198
199 out:
200 return ret;
201 }
202
lbs_command_queue_empty(struct lbs_private * priv)203 static bool lbs_command_queue_empty(struct lbs_private *priv)
204 {
205 unsigned long flags;
206 bool ret;
207 spin_lock_irqsave(&priv->driver_lock, flags);
208 ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
209 spin_unlock_irqrestore(&priv->driver_lock, flags);
210 return ret;
211 }
212
lbs_stop_iface(struct lbs_private * priv)213 int lbs_stop_iface(struct lbs_private *priv)
214 {
215 unsigned long flags;
216 int ret = 0;
217
218 spin_lock_irqsave(&priv->driver_lock, flags);
219 priv->iface_running = false;
220 kfree_skb(priv->currenttxskb);
221 priv->currenttxskb = NULL;
222 priv->tx_pending_len = 0;
223 spin_unlock_irqrestore(&priv->driver_lock, flags);
224
225 cancel_work_sync(&priv->mcast_work);
226 del_timer_sync(&priv->tx_lockup_timer);
227
228 /* Disable command processing, and wait for all commands to complete */
229 lbs_deb_main("waiting for commands to complete\n");
230 wait_event(priv->waitq, lbs_command_queue_empty(priv));
231 lbs_deb_main("all commands completed\n");
232
233 if (priv->power_save)
234 ret = priv->power_save(priv);
235
236 return ret;
237 }
238
239 /**
240 * lbs_eth_stop - close the ethX interface
241 *
242 * @dev: A pointer to &net_device structure
243 * returns: 0
244 */
lbs_eth_stop(struct net_device * dev)245 static int lbs_eth_stop(struct net_device *dev)
246 {
247 struct lbs_private *priv = dev->ml_priv;
248
249 if (priv->connect_status == LBS_CONNECTED)
250 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
251
252 spin_lock_irq(&priv->driver_lock);
253 netif_stop_queue(dev);
254 spin_unlock_irq(&priv->driver_lock);
255
256 lbs_update_mcast(priv);
257 cancel_delayed_work_sync(&priv->scan_work);
258 if (priv->scan_req)
259 lbs_scan_done(priv);
260
261 netif_carrier_off(priv->dev);
262
263 if (!lbs_iface_active(priv))
264 lbs_stop_iface(priv);
265
266 return 0;
267 }
268
lbs_host_to_card_done(struct lbs_private * priv)269 void lbs_host_to_card_done(struct lbs_private *priv)
270 {
271 unsigned long flags;
272
273 spin_lock_irqsave(&priv->driver_lock, flags);
274 del_timer(&priv->tx_lockup_timer);
275
276 priv->dnld_sent = DNLD_RES_RECEIVED;
277
278 /* Wake main thread if commands are pending */
279 if (!priv->cur_cmd || priv->tx_pending_len > 0) {
280 if (!priv->wakeup_dev_required)
281 wake_up(&priv->waitq);
282 }
283
284 spin_unlock_irqrestore(&priv->driver_lock, flags);
285 }
286 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
287
lbs_set_mac_address(struct net_device * dev,void * addr)288 int lbs_set_mac_address(struct net_device *dev, void *addr)
289 {
290 int ret = 0;
291 struct lbs_private *priv = dev->ml_priv;
292 struct sockaddr *phwaddr = addr;
293
294 /*
295 * Can only set MAC address when all interfaces are down, to be written
296 * to the hardware when one of them is brought up.
297 */
298 if (lbs_iface_active(priv))
299 return -EBUSY;
300
301 /* In case it was called from the mesh device */
302 dev = priv->dev;
303
304 memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
305 memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
306 if (priv->mesh_dev)
307 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
308
309 return ret;
310 }
311
312
mac_in_list(unsigned char * list,int list_len,unsigned char * mac)313 static inline int mac_in_list(unsigned char *list, int list_len,
314 unsigned char *mac)
315 {
316 while (list_len) {
317 if (!memcmp(list, mac, ETH_ALEN))
318 return 1;
319 list += ETH_ALEN;
320 list_len--;
321 }
322 return 0;
323 }
324
325
lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr * cmd,struct net_device * dev,int nr_addrs)326 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
327 struct net_device *dev, int nr_addrs)
328 {
329 int i = nr_addrs;
330 struct netdev_hw_addr *ha;
331 int cnt;
332
333 if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
334 return nr_addrs;
335
336 netif_addr_lock_bh(dev);
337 cnt = netdev_mc_count(dev);
338 netdev_for_each_mc_addr(ha, dev) {
339 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
340 lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
341 ha->addr);
342 cnt--;
343 continue;
344 }
345
346 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
347 break;
348 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
349 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
350 ha->addr);
351 i++;
352 cnt--;
353 }
354 netif_addr_unlock_bh(dev);
355 if (cnt)
356 return -EOVERFLOW;
357
358 return i;
359 }
360
lbs_update_mcast(struct lbs_private * priv)361 void lbs_update_mcast(struct lbs_private *priv)
362 {
363 struct cmd_ds_mac_multicast_adr mcast_cmd;
364 int dev_flags = 0;
365 int nr_addrs;
366 int old_mac_control = priv->mac_control;
367
368 if (netif_running(priv->dev))
369 dev_flags |= priv->dev->flags;
370 if (priv->mesh_dev && netif_running(priv->mesh_dev))
371 dev_flags |= priv->mesh_dev->flags;
372
373 if (dev_flags & IFF_PROMISC) {
374 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
375 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
376 CMD_ACT_MAC_MULTICAST_ENABLE);
377 goto out_set_mac_control;
378 } else if (dev_flags & IFF_ALLMULTI) {
379 do_allmulti:
380 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
381 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
382 CMD_ACT_MAC_MULTICAST_ENABLE);
383 goto out_set_mac_control;
384 }
385
386 /* Once for priv->dev, again for priv->mesh_dev if it exists */
387 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
388 if (nr_addrs >= 0 && priv->mesh_dev)
389 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
390 if (nr_addrs < 0)
391 goto do_allmulti;
392
393 if (nr_addrs) {
394 int size = offsetof(struct cmd_ds_mac_multicast_adr,
395 maclist[6*nr_addrs]);
396
397 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
398 mcast_cmd.hdr.size = cpu_to_le16(size);
399 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
400
401 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
402
403 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
404 } else
405 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
406
407 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
408 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
409 out_set_mac_control:
410 if (priv->mac_control != old_mac_control)
411 lbs_set_mac_control(priv);
412 }
413
lbs_set_mcast_worker(struct work_struct * work)414 static void lbs_set_mcast_worker(struct work_struct *work)
415 {
416 struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
417 lbs_update_mcast(priv);
418 }
419
lbs_set_multicast_list(struct net_device * dev)420 void lbs_set_multicast_list(struct net_device *dev)
421 {
422 struct lbs_private *priv = dev->ml_priv;
423
424 schedule_work(&priv->mcast_work);
425 }
426
427 /**
428 * lbs_thread - handles the major jobs in the LBS driver.
429 * It handles all events generated by firmware, RX data received
430 * from firmware and TX data sent from kernel.
431 *
432 * @data: A pointer to &lbs_thread structure
433 * returns: 0
434 */
lbs_thread(void * data)435 static int lbs_thread(void *data)
436 {
437 struct net_device *dev = data;
438 struct lbs_private *priv = dev->ml_priv;
439 wait_queue_entry_t wait;
440
441 init_waitqueue_entry(&wait, current);
442
443 for (;;) {
444 int shouldsleep;
445 u8 resp_idx;
446
447 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
448 priv->currenttxskb, priv->dnld_sent);
449
450 add_wait_queue(&priv->waitq, &wait);
451 set_current_state(TASK_INTERRUPTIBLE);
452 spin_lock_irq(&priv->driver_lock);
453
454 if (kthread_should_stop())
455 shouldsleep = 0; /* Bye */
456 else if (priv->surpriseremoved)
457 shouldsleep = 1; /* We need to wait until we're _told_ to die */
458 else if (priv->psstate == PS_STATE_SLEEP)
459 shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
460 else if (priv->cmd_timed_out)
461 shouldsleep = 0; /* Command timed out. Recover */
462 else if (!priv->fw_ready)
463 shouldsleep = 1; /* Firmware not ready. We're waiting for it */
464 else if (priv->dnld_sent)
465 shouldsleep = 1; /* Something is en route to the device already */
466 else if (priv->tx_pending_len > 0)
467 shouldsleep = 0; /* We've a packet to send */
468 else if (priv->resp_len[priv->resp_idx])
469 shouldsleep = 0; /* We have a command response */
470 else if (priv->cur_cmd)
471 shouldsleep = 1; /* Can't send a command; one already running */
472 else if (!list_empty(&priv->cmdpendingq) &&
473 !(priv->wakeup_dev_required))
474 shouldsleep = 0; /* We have a command to send */
475 else if (kfifo_len(&priv->event_fifo))
476 shouldsleep = 0; /* We have an event to process */
477 else
478 shouldsleep = 1; /* No command */
479
480 if (shouldsleep) {
481 lbs_deb_thread("sleeping, connect_status %d, "
482 "psmode %d, psstate %d\n",
483 priv->connect_status,
484 priv->psmode, priv->psstate);
485 spin_unlock_irq(&priv->driver_lock);
486 schedule();
487 } else
488 spin_unlock_irq(&priv->driver_lock);
489
490 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
491 priv->currenttxskb, priv->dnld_sent);
492
493 set_current_state(TASK_RUNNING);
494 remove_wait_queue(&priv->waitq, &wait);
495
496 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
497 priv->currenttxskb, priv->dnld_sent);
498
499 if (kthread_should_stop()) {
500 lbs_deb_thread("break from main thread\n");
501 break;
502 }
503
504 if (priv->surpriseremoved) {
505 lbs_deb_thread("adapter removed; waiting to die...\n");
506 continue;
507 }
508
509 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
510 priv->currenttxskb, priv->dnld_sent);
511
512 /* Process any pending command response */
513 spin_lock_irq(&priv->driver_lock);
514 resp_idx = priv->resp_idx;
515 if (priv->resp_len[resp_idx]) {
516 spin_unlock_irq(&priv->driver_lock);
517 lbs_process_command_response(priv,
518 priv->resp_buf[resp_idx],
519 priv->resp_len[resp_idx]);
520 spin_lock_irq(&priv->driver_lock);
521 priv->resp_len[resp_idx] = 0;
522 }
523 spin_unlock_irq(&priv->driver_lock);
524
525 /* Process hardware events, e.g. card removed, link lost */
526 spin_lock_irq(&priv->driver_lock);
527 while (kfifo_len(&priv->event_fifo)) {
528 u32 event;
529
530 if (kfifo_out(&priv->event_fifo,
531 (unsigned char *) &event, sizeof(event)) !=
532 sizeof(event))
533 break;
534 spin_unlock_irq(&priv->driver_lock);
535 lbs_process_event(priv, event);
536 spin_lock_irq(&priv->driver_lock);
537 }
538 spin_unlock_irq(&priv->driver_lock);
539
540 if (priv->wakeup_dev_required) {
541 lbs_deb_thread("Waking up device...\n");
542 /* Wake up device */
543 if (priv->exit_deep_sleep(priv))
544 lbs_deb_thread("Wakeup device failed\n");
545 continue;
546 }
547
548 /* command timeout stuff */
549 if (priv->cmd_timed_out && priv->cur_cmd) {
550 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
551
552 netdev_info(dev, "Timeout submitting command 0x%04x\n",
553 le16_to_cpu(cmdnode->cmdbuf->command));
554 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
555
556 /* Reset card, but only when it isn't in the process
557 * of being shutdown anyway. */
558 if (!dev->dismantle && priv->reset_card)
559 priv->reset_card(priv);
560 }
561 priv->cmd_timed_out = 0;
562
563 if (!priv->fw_ready)
564 continue;
565
566 /* Check if we need to confirm Sleep Request received previously */
567 if (priv->psstate == PS_STATE_PRE_SLEEP &&
568 !priv->dnld_sent && !priv->cur_cmd) {
569 if (priv->connect_status == LBS_CONNECTED) {
570 lbs_deb_thread("pre-sleep, currenttxskb %p, "
571 "dnld_sent %d, cur_cmd %p\n",
572 priv->currenttxskb, priv->dnld_sent,
573 priv->cur_cmd);
574
575 lbs_ps_confirm_sleep(priv);
576 } else {
577 /* workaround for firmware sending
578 * deauth/linkloss event immediately
579 * after sleep request; remove this
580 * after firmware fixes it
581 */
582 priv->psstate = PS_STATE_AWAKE;
583 netdev_alert(dev,
584 "ignore PS_SleepConfirm in non-connected state\n");
585 }
586 }
587
588 /* The PS state is changed during processing of Sleep Request
589 * event above
590 */
591 if ((priv->psstate == PS_STATE_SLEEP) ||
592 (priv->psstate == PS_STATE_PRE_SLEEP))
593 continue;
594
595 if (priv->is_deep_sleep)
596 continue;
597
598 /* Execute the next command */
599 if (!priv->dnld_sent && !priv->cur_cmd)
600 lbs_execute_next_command(priv);
601
602 spin_lock_irq(&priv->driver_lock);
603 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
604 int ret = priv->hw_host_to_card(priv, MVMS_DAT,
605 priv->tx_pending_buf,
606 priv->tx_pending_len);
607 if (ret) {
608 lbs_deb_tx("host_to_card failed %d\n", ret);
609 priv->dnld_sent = DNLD_RES_RECEIVED;
610 } else {
611 mod_timer(&priv->tx_lockup_timer,
612 jiffies + (HZ * 5));
613 }
614 priv->tx_pending_len = 0;
615 if (!priv->currenttxskb) {
616 /* We can wake the queues immediately if we aren't
617 waiting for TX feedback */
618 if (priv->connect_status == LBS_CONNECTED)
619 netif_wake_queue(priv->dev);
620 if (priv->mesh_dev &&
621 netif_running(priv->mesh_dev))
622 netif_wake_queue(priv->mesh_dev);
623 }
624 }
625 spin_unlock_irq(&priv->driver_lock);
626 }
627
628 del_timer(&priv->command_timer);
629 del_timer(&priv->tx_lockup_timer);
630 del_timer(&priv->auto_deepsleep_timer);
631
632 return 0;
633 }
634
635 /**
636 * lbs_setup_firmware - gets the HW spec from the firmware and sets
637 * some basic parameters
638 *
639 * @priv: A pointer to &struct lbs_private structure
640 * returns: 0 or -1
641 */
lbs_setup_firmware(struct lbs_private * priv)642 static int lbs_setup_firmware(struct lbs_private *priv)
643 {
644 int ret = -1;
645 s16 curlevel = 0, minlevel = 0, maxlevel = 0;
646
647 /* Read MAC address from firmware */
648 eth_broadcast_addr(priv->current_addr);
649 ret = lbs_update_hw_spec(priv);
650 if (ret)
651 goto done;
652
653 /* Read power levels if available */
654 ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
655 if (ret == 0) {
656 priv->txpower_cur = curlevel;
657 priv->txpower_min = minlevel;
658 priv->txpower_max = maxlevel;
659 }
660
661 /* Send cmd to FW to enable 11D function */
662 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
663 if (ret)
664 goto done;
665
666 ret = lbs_set_mac_control_sync(priv);
667 done:
668 return ret;
669 }
670
lbs_suspend(struct lbs_private * priv)671 int lbs_suspend(struct lbs_private *priv)
672 {
673 int ret;
674
675 if (priv->is_deep_sleep) {
676 ret = lbs_set_deep_sleep(priv, 0);
677 if (ret) {
678 netdev_err(priv->dev,
679 "deep sleep cancellation failed: %d\n", ret);
680 return ret;
681 }
682 priv->deep_sleep_required = 1;
683 }
684
685 ret = lbs_set_host_sleep(priv, 1);
686
687 netif_device_detach(priv->dev);
688 if (priv->mesh_dev)
689 netif_device_detach(priv->mesh_dev);
690
691 return ret;
692 }
693 EXPORT_SYMBOL_GPL(lbs_suspend);
694
lbs_resume(struct lbs_private * priv)695 int lbs_resume(struct lbs_private *priv)
696 {
697 int ret;
698
699 ret = lbs_set_host_sleep(priv, 0);
700
701 netif_device_attach(priv->dev);
702 if (priv->mesh_dev)
703 netif_device_attach(priv->mesh_dev);
704
705 if (priv->deep_sleep_required) {
706 priv->deep_sleep_required = 0;
707 ret = lbs_set_deep_sleep(priv, 1);
708 if (ret)
709 netdev_err(priv->dev,
710 "deep sleep activation failed: %d\n", ret);
711 }
712
713 if (priv->setup_fw_on_resume)
714 ret = lbs_setup_firmware(priv);
715
716 return ret;
717 }
718 EXPORT_SYMBOL_GPL(lbs_resume);
719
720 /**
721 * lbs_cmd_timeout_handler - handles the timeout of command sending.
722 * It will re-send the same command again.
723 *
724 * @t: Context from which to retrieve a &struct lbs_private pointer
725 */
lbs_cmd_timeout_handler(struct timer_list * t)726 static void lbs_cmd_timeout_handler(struct timer_list *t)
727 {
728 struct lbs_private *priv = from_timer(priv, t, command_timer);
729 unsigned long flags;
730
731 spin_lock_irqsave(&priv->driver_lock, flags);
732
733 if (!priv->cur_cmd)
734 goto out;
735
736 netdev_info(priv->dev, "command 0x%04x timed out\n",
737 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
738
739 priv->cmd_timed_out = 1;
740
741 /*
742 * If the device didn't even acknowledge the command, reset the state
743 * so that we don't block all future commands due to this one timeout.
744 */
745 if (priv->dnld_sent == DNLD_CMD_SENT)
746 priv->dnld_sent = DNLD_RES_RECEIVED;
747
748 wake_up(&priv->waitq);
749 out:
750 spin_unlock_irqrestore(&priv->driver_lock, flags);
751 }
752
753 /**
754 * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
755 * to the hardware. This is known to frequently happen with SD8686 when
756 * waking up after a Wake-on-WLAN-triggered resume.
757 *
758 * @t: Context from which to retrieve a &struct lbs_private pointer
759 */
lbs_tx_lockup_handler(struct timer_list * t)760 static void lbs_tx_lockup_handler(struct timer_list *t)
761 {
762 struct lbs_private *priv = from_timer(priv, t, tx_lockup_timer);
763 unsigned long flags;
764
765 spin_lock_irqsave(&priv->driver_lock, flags);
766
767 netdev_info(priv->dev, "TX lockup detected\n");
768 if (priv->reset_card)
769 priv->reset_card(priv);
770
771 priv->dnld_sent = DNLD_RES_RECEIVED;
772 wake_up_interruptible(&priv->waitq);
773
774 spin_unlock_irqrestore(&priv->driver_lock, flags);
775 }
776
777 /**
778 * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
779 * timer expires and no activity (command, event, data etc.) is detected.
780 * @t: Context from which to retrieve a &struct lbs_private pointer
781 * returns: N/A
782 */
auto_deepsleep_timer_fn(struct timer_list * t)783 static void auto_deepsleep_timer_fn(struct timer_list *t)
784 {
785 struct lbs_private *priv = from_timer(priv, t, auto_deepsleep_timer);
786
787 if (priv->is_activity_detected) {
788 priv->is_activity_detected = 0;
789 } else {
790 if (priv->is_auto_deep_sleep_enabled &&
791 (!priv->wakeup_dev_required) &&
792 (priv->connect_status != LBS_CONNECTED)) {
793 struct cmd_header cmd;
794
795 lbs_deb_main("Entering auto deep sleep mode...\n");
796 memset(&cmd, 0, sizeof(cmd));
797 cmd.size = cpu_to_le16(sizeof(cmd));
798 lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
799 sizeof(cmd));
800 }
801 }
802 mod_timer(&priv->auto_deepsleep_timer , jiffies +
803 (priv->auto_deep_sleep_timeout * HZ)/1000);
804 }
805
lbs_enter_auto_deep_sleep(struct lbs_private * priv)806 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
807 {
808 priv->is_auto_deep_sleep_enabled = 1;
809 if (priv->is_deep_sleep)
810 priv->wakeup_dev_required = 1;
811 mod_timer(&priv->auto_deepsleep_timer ,
812 jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
813
814 return 0;
815 }
816
lbs_exit_auto_deep_sleep(struct lbs_private * priv)817 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
818 {
819 priv->is_auto_deep_sleep_enabled = 0;
820 priv->auto_deep_sleep_timeout = 0;
821 del_timer(&priv->auto_deepsleep_timer);
822
823 return 0;
824 }
825
lbs_init_adapter(struct lbs_private * priv)826 static int lbs_init_adapter(struct lbs_private *priv)
827 {
828 int ret;
829
830 eth_broadcast_addr(priv->current_addr);
831
832 priv->connect_status = LBS_DISCONNECTED;
833 priv->channel = DEFAULT_AD_HOC_CHANNEL;
834 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
835 priv->radio_on = 1;
836 priv->psmode = LBS802_11POWERMODECAM;
837 priv->psstate = PS_STATE_FULL_POWER;
838 priv->is_deep_sleep = 0;
839 priv->is_auto_deep_sleep_enabled = 0;
840 priv->deep_sleep_required = 0;
841 priv->wakeup_dev_required = 0;
842 init_waitqueue_head(&priv->ds_awake_q);
843 init_waitqueue_head(&priv->scan_q);
844 priv->authtype_auto = 1;
845 priv->is_host_sleep_configured = 0;
846 priv->is_host_sleep_activated = 0;
847 init_waitqueue_head(&priv->host_sleep_q);
848 init_waitqueue_head(&priv->fw_waitq);
849 mutex_init(&priv->lock);
850
851 timer_setup(&priv->command_timer, lbs_cmd_timeout_handler, 0);
852 timer_setup(&priv->tx_lockup_timer, lbs_tx_lockup_handler, 0);
853 timer_setup(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, 0);
854
855 INIT_LIST_HEAD(&priv->cmdfreeq);
856 INIT_LIST_HEAD(&priv->cmdpendingq);
857
858 spin_lock_init(&priv->driver_lock);
859
860 /* Allocate the command buffers */
861 if (lbs_allocate_cmd_buffer(priv)) {
862 pr_err("Out of memory allocating command buffers\n");
863 ret = -ENOMEM;
864 goto out;
865 }
866 priv->resp_idx = 0;
867 priv->resp_len[0] = priv->resp_len[1] = 0;
868
869 /* Create the event FIFO */
870 ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
871 if (ret) {
872 pr_err("Out of memory allocating event FIFO buffer\n");
873 goto out;
874 }
875
876 out:
877 return ret;
878 }
879
lbs_free_adapter(struct lbs_private * priv)880 static void lbs_free_adapter(struct lbs_private *priv)
881 {
882 lbs_free_cmd_buffer(priv);
883 kfifo_free(&priv->event_fifo);
884 del_timer(&priv->command_timer);
885 del_timer(&priv->tx_lockup_timer);
886 del_timer(&priv->auto_deepsleep_timer);
887 }
888
889 static const struct net_device_ops lbs_netdev_ops = {
890 .ndo_open = lbs_dev_open,
891 .ndo_stop = lbs_eth_stop,
892 .ndo_start_xmit = lbs_hard_start_xmit,
893 .ndo_set_mac_address = lbs_set_mac_address,
894 .ndo_set_rx_mode = lbs_set_multicast_list,
895 .ndo_validate_addr = eth_validate_addr,
896 };
897
898 /**
899 * lbs_add_card - adds the card. It will probe the
900 * card, allocate the lbs_priv and initialize the device.
901 *
902 * @card: A pointer to card
903 * @dmdev: A pointer to &struct device
904 * returns: A pointer to &struct lbs_private structure
905 */
lbs_add_card(void * card,struct device * dmdev)906 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
907 {
908 struct net_device *dev;
909 struct wireless_dev *wdev;
910 struct lbs_private *priv = NULL;
911 int err;
912
913 /* Allocate an Ethernet device and register it */
914 wdev = lbs_cfg_alloc(dmdev);
915 if (IS_ERR(wdev)) {
916 err = PTR_ERR(wdev);
917 pr_err("cfg80211 init failed\n");
918 goto err_cfg;
919 }
920
921 wdev->iftype = NL80211_IFTYPE_STATION;
922 priv = wdev_priv(wdev);
923 priv->wdev = wdev;
924
925 err = lbs_init_adapter(priv);
926 if (err) {
927 pr_err("failed to initialize adapter structure\n");
928 goto err_wdev;
929 }
930
931 dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
932 if (!dev) {
933 err = -ENOMEM;
934 dev_err(dmdev, "no memory for network device instance\n");
935 goto err_adapter;
936 }
937
938 dev->ieee80211_ptr = wdev;
939 dev->ml_priv = priv;
940 SET_NETDEV_DEV(dev, dmdev);
941 wdev->netdev = dev;
942 priv->dev = dev;
943
944 dev->netdev_ops = &lbs_netdev_ops;
945 dev->watchdog_timeo = 5 * HZ;
946 dev->ethtool_ops = &lbs_ethtool_ops;
947 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
948
949 priv->card = card;
950
951 strcpy(dev->name, "wlan%d");
952
953 lbs_deb_thread("Starting main thread...\n");
954 init_waitqueue_head(&priv->waitq);
955 priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
956 if (IS_ERR(priv->main_thread)) {
957 err = PTR_ERR(priv->main_thread);
958 lbs_deb_thread("Error creating main thread.\n");
959 goto err_ndev;
960 }
961
962 priv->work_thread = create_singlethread_workqueue("lbs_worker");
963 INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
964
965 priv->wol_criteria = EHS_REMOVE_WAKEUP;
966 priv->wol_gpio = 0xff;
967 priv->wol_gap = 20;
968 priv->ehs_remove_supported = true;
969
970 return priv;
971
972 err_ndev:
973 free_netdev(dev);
974
975 err_adapter:
976 lbs_free_adapter(priv);
977
978 err_wdev:
979 lbs_cfg_free(priv);
980
981 err_cfg:
982 return ERR_PTR(err);
983 }
984 EXPORT_SYMBOL_GPL(lbs_add_card);
985
986
lbs_remove_card(struct lbs_private * priv)987 void lbs_remove_card(struct lbs_private *priv)
988 {
989 struct net_device *dev = priv->dev;
990
991 lbs_remove_mesh(priv);
992
993 if (priv->wiphy_registered)
994 lbs_scan_deinit(priv);
995
996 lbs_wait_for_firmware_load(priv);
997
998 /* worker thread destruction blocks on the in-flight command which
999 * should have been cleared already in lbs_stop_card().
1000 */
1001 lbs_deb_main("destroying worker thread\n");
1002 destroy_workqueue(priv->work_thread);
1003 lbs_deb_main("done destroying worker thread\n");
1004
1005 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1006 priv->psmode = LBS802_11POWERMODECAM;
1007 /* no need to wakeup if already woken up,
1008 * on suspend, this exit ps command is not processed
1009 * the driver hangs
1010 */
1011 if (priv->psstate != PS_STATE_FULL_POWER)
1012 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1013 }
1014
1015 if (priv->is_deep_sleep) {
1016 priv->is_deep_sleep = 0;
1017 wake_up_interruptible(&priv->ds_awake_q);
1018 }
1019
1020 priv->is_host_sleep_configured = 0;
1021 priv->is_host_sleep_activated = 0;
1022 wake_up_interruptible(&priv->host_sleep_q);
1023
1024 /* Stop the thread servicing the interrupts */
1025 priv->surpriseremoved = 1;
1026 kthread_stop(priv->main_thread);
1027
1028 lbs_free_adapter(priv);
1029 lbs_cfg_free(priv);
1030 free_netdev(dev);
1031 }
1032 EXPORT_SYMBOL_GPL(lbs_remove_card);
1033
1034
lbs_rtap_supported(struct lbs_private * priv)1035 int lbs_rtap_supported(struct lbs_private *priv)
1036 {
1037 if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1038 return 1;
1039
1040 /* newer firmware use a capability mask */
1041 return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1042 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1043 }
1044
1045
lbs_start_card(struct lbs_private * priv)1046 int lbs_start_card(struct lbs_private *priv)
1047 {
1048 struct net_device *dev = priv->dev;
1049 int ret;
1050
1051 /* poke the firmware */
1052 ret = lbs_setup_firmware(priv);
1053 if (ret)
1054 goto done;
1055
1056 if (!lbs_disablemesh)
1057 lbs_init_mesh(priv);
1058 else
1059 pr_info("%s: mesh disabled\n", dev->name);
1060
1061 ret = lbs_cfg_register(priv);
1062 if (ret) {
1063 pr_err("cannot register device\n");
1064 goto done;
1065 }
1066
1067 if (lbs_mesh_activated(priv))
1068 lbs_start_mesh(priv);
1069
1070 lbs_debugfs_init_one(priv, dev);
1071
1072 netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1073
1074 ret = 0;
1075
1076 done:
1077 return ret;
1078 }
1079 EXPORT_SYMBOL_GPL(lbs_start_card);
1080
1081
lbs_stop_card(struct lbs_private * priv)1082 void lbs_stop_card(struct lbs_private *priv)
1083 {
1084 struct net_device *dev;
1085
1086 if (!priv)
1087 return;
1088 dev = priv->dev;
1089
1090 /* If the netdev isn't registered, it means that lbs_start_card() was
1091 * never called so we have nothing to do here. */
1092 if (dev->reg_state != NETREG_REGISTERED)
1093 return;
1094
1095 netif_stop_queue(dev);
1096 netif_carrier_off(dev);
1097
1098 lbs_debugfs_remove_one(priv);
1099 lbs_deinit_mesh(priv);
1100 unregister_netdev(dev);
1101 }
1102 EXPORT_SYMBOL_GPL(lbs_stop_card);
1103
1104
lbs_queue_event(struct lbs_private * priv,u32 event)1105 void lbs_queue_event(struct lbs_private *priv, u32 event)
1106 {
1107 unsigned long flags;
1108
1109 spin_lock_irqsave(&priv->driver_lock, flags);
1110
1111 if (priv->psstate == PS_STATE_SLEEP)
1112 priv->psstate = PS_STATE_AWAKE;
1113
1114 kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1115
1116 wake_up(&priv->waitq);
1117
1118 spin_unlock_irqrestore(&priv->driver_lock, flags);
1119 }
1120 EXPORT_SYMBOL_GPL(lbs_queue_event);
1121
lbs_notify_command_response(struct lbs_private * priv,u8 resp_idx)1122 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1123 {
1124 if (priv->psstate == PS_STATE_SLEEP)
1125 priv->psstate = PS_STATE_AWAKE;
1126
1127 /* Swap buffers by flipping the response index */
1128 BUG_ON(resp_idx > 1);
1129 priv->resp_idx = resp_idx;
1130
1131 wake_up(&priv->waitq);
1132 }
1133 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1134
lbs_init_module(void)1135 static int __init lbs_init_module(void)
1136 {
1137 memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1138 confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1139 confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1140 confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1141 lbs_debugfs_init();
1142
1143 return 0;
1144 }
1145
lbs_exit_module(void)1146 static void __exit lbs_exit_module(void)
1147 {
1148 lbs_debugfs_remove();
1149 }
1150
1151 module_init(lbs_init_module);
1152 module_exit(lbs_exit_module);
1153
1154 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1155 MODULE_AUTHOR("Marvell International Ltd.");
1156 MODULE_LICENSE("GPL");
1157