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 */
lbs_fw_index_to_data_rate(u8 idx)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 */
lbs_data_rate_to_fw_index(u32 rate)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
lbs_set_iface_type(struct lbs_private * priv,enum nl80211_iftype type)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
lbs_start_iface(struct lbs_private * priv)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 */
lbs_dev_open(struct net_device * dev)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
lbs_command_queue_empty(struct lbs_private * priv)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
lbs_stop_iface(struct lbs_private * priv)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 dev_kfree_skb_irq(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 */
lbs_eth_stop(struct net_device * dev)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
lbs_host_to_card_done(struct lbs_private * priv)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
lbs_set_mac_address(struct net_device * dev,void * addr)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
mac_in_list(unsigned char * list,int list_len,unsigned char * mac)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
lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr * cmd,struct net_device * dev,int nr_addrs)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
lbs_update_mcast(struct lbs_private * priv)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
lbs_set_mcast_worker(struct work_struct * work)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
lbs_set_multicast_list(struct net_device * dev)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 */
lbs_thread(void * data)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 */
lbs_setup_firmware(struct lbs_private * priv)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
lbs_suspend(struct lbs_private * priv)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
lbs_resume(struct lbs_private * priv)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 */
lbs_cmd_timeout_handler(struct timer_list * t)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 */
lbs_tx_lockup_handler(struct timer_list * t)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 */
auto_deepsleep_timer_fn(struct timer_list * t)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
lbs_enter_auto_deep_sleep(struct lbs_private * priv)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
lbs_exit_auto_deep_sleep(struct lbs_private * priv)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
lbs_init_adapter(struct lbs_private * priv)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 lbs_free_cmd_buffer(priv);
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