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kfifo: fix warn_unused_result
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / libertas / main.c
blobc2975c8e2f211ff2f9cb64ac61db3e26f7d93862
1 /**
2 * This file contains the major functions in WLAN
3 * driver. It includes init, exit, open, close and main
4 * thread etc..
5 */
6
7 #include <linux/moduleparam.h>
8 #include <linux/delay.h>
9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h>
11 #include <linux/if_arp.h>
12 #include <linux/kthread.h>
13 #include <linux/kfifo.h>
14 #include <linux/stddef.h>
15 #include <linux/ieee80211.h>
16 #include <net/iw_handler.h>
17 #include <net/cfg80211.h>
18
19 #include "host.h"
20 #include "decl.h"
21 #include "dev.h"
22 #include "wext.h"
23 #include "cfg.h"
24 #include "debugfs.h"
25 #include "scan.h"
26 #include "assoc.h"
27 #include "cmd.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
43 /* This global structure is used to send the confirm_sleep command as
44 * fast as possible down to the firmware. */
45 struct cmd_confirm_sleep confirm_sleep;
46
47
48 /**
49 * the table to keep region code
50 */
51 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
52 { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
53
54 /**
55 * FW rate table. FW refers to rates by their index in this table, not by the
56 * rate value itself. Values of 0x00 are
57 * reserved positions.
58 */
59 static u8 fw_data_rates[MAX_RATES] =
60 { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
61 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
62 };
63
64 /**
65 * @brief use index to get the data rate
66 *
67 * @param idx The index of data rate
68 * @return data rate or 0
69 */
70 u32 lbs_fw_index_to_data_rate(u8 idx)
71 {
72 if (idx >= sizeof(fw_data_rates))
73 idx = 0;
74 return fw_data_rates[idx];
75 }
76
77 /**
78 * @brief use rate to get the index
79 *
80 * @param rate data rate
81 * @return index or 0
82 */
83 u8 lbs_data_rate_to_fw_index(u32 rate)
84 {
85 u8 i;
86
87 if (!rate)
88 return 0;
89
90 for (i = 0; i < sizeof(fw_data_rates); i++) {
91 if (rate == fw_data_rates[i])
92 return i;
93 }
94 return 0;
95 }
96
97
98 static int lbs_add_rtap(struct lbs_private *priv);
99 static void lbs_remove_rtap(struct lbs_private *priv);
100
101
102 /**
103 * Get function for sysfs attribute rtap
104 */
105 static ssize_t lbs_rtap_get(struct device *dev,
106 struct device_attribute *attr, char * buf)
107 {
108 struct lbs_private *priv = to_net_dev(dev)->ml_priv;
109 return snprintf(buf, 5, "0x%X\n", priv->monitormode);
110 }
111
112 /**
113 * Set function for sysfs attribute rtap
114 */
115 static ssize_t lbs_rtap_set(struct device *dev,
116 struct device_attribute *attr, const char * buf, size_t count)
117 {
118 int monitor_mode;
119 struct lbs_private *priv = to_net_dev(dev)->ml_priv;
120
121 sscanf(buf, "%x", &monitor_mode);
122 if (monitor_mode) {
123 if (priv->monitormode == monitor_mode)
124 return strlen(buf);
125 if (!priv->monitormode) {
126 if (priv->infra_open || priv->mesh_open)
127 return -EBUSY;
128 if (priv->mode == IW_MODE_INFRA)
129 lbs_cmd_80211_deauthenticate(priv,
130 priv->curbssparams.bssid,
131 WLAN_REASON_DEAUTH_LEAVING);
132 else if (priv->mode == IW_MODE_ADHOC)
133 lbs_adhoc_stop(priv);
134 lbs_add_rtap(priv);
135 }
136 priv->monitormode = monitor_mode;
137 } else {
138 if (!priv->monitormode)
139 return strlen(buf);
140 priv->monitormode = 0;
141 lbs_remove_rtap(priv);
142
143 if (priv->currenttxskb) {
144 dev_kfree_skb_any(priv->currenttxskb);
145 priv->currenttxskb = NULL;
146 }
147
148 /* Wake queues, command thread, etc. */
149 lbs_host_to_card_done(priv);
150 }
151
152 lbs_prepare_and_send_command(priv,
153 CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
154 CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
155 return strlen(buf);
156 }
157
158 /**
159 * lbs_rtap attribute to be exported per ethX interface
160 * through sysfs (/sys/class/net/ethX/lbs_rtap)
161 */
162 static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set );
163
164 /**
165 * @brief This function opens the ethX interface
166 *
167 * @param dev A pointer to net_device structure
168 * @return 0 or -EBUSY if monitor mode active
169 */
170 static int lbs_dev_open(struct net_device *dev)
171 {
172 struct lbs_private *priv = dev->ml_priv;
173 int ret = 0;
174
175 lbs_deb_enter(LBS_DEB_NET);
176
177 spin_lock_irq(&priv->driver_lock);
178
179 if (priv->monitormode) {
180 ret = -EBUSY;
181 goto out;
182 }
183
184 priv->infra_open = 1;
185
186 if (priv->connect_status == LBS_CONNECTED)
187 netif_carrier_on(dev);
188 else
189 netif_carrier_off(dev);
190
191 if (!priv->tx_pending_len)
192 netif_wake_queue(dev);
193 out:
194
195 spin_unlock_irq(&priv->driver_lock);
196 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
197 return ret;
198 }
199
200 /**
201 * @brief This function closes the ethX interface
202 *
203 * @param dev A pointer to net_device structure
204 * @return 0
205 */
206 static int lbs_eth_stop(struct net_device *dev)
207 {
208 struct lbs_private *priv = dev->ml_priv;
209
210 lbs_deb_enter(LBS_DEB_NET);
211
212 spin_lock_irq(&priv->driver_lock);
213 priv->infra_open = 0;
214 netif_stop_queue(dev);
215 spin_unlock_irq(&priv->driver_lock);
216
217 schedule_work(&priv->mcast_work);
218
219 lbs_deb_leave(LBS_DEB_NET);
220 return 0;
221 }
222
223 static void lbs_tx_timeout(struct net_device *dev)
224 {
225 struct lbs_private *priv = dev->ml_priv;
226
227 lbs_deb_enter(LBS_DEB_TX);
228
229 lbs_pr_err("tx watch dog timeout\n");
230
231 dev->trans_start = jiffies;
232
233 if (priv->currenttxskb)
234 lbs_send_tx_feedback(priv, 0);
235
236 /* XX: Shouldn't we also call into the hw-specific driver
237 to kick it somehow? */
238 lbs_host_to_card_done(priv);
239
240 /* More often than not, this actually happens because the
241 firmware has crapped itself -- rather than just a very
242 busy medium. So send a harmless command, and if/when
243 _that_ times out, we'll kick it in the head. */
244 lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
245 0, 0, NULL);
246
247 lbs_deb_leave(LBS_DEB_TX);
248 }
249
250 void lbs_host_to_card_done(struct lbs_private *priv)
251 {
252 unsigned long flags;
253
254 lbs_deb_enter(LBS_DEB_THREAD);
255
256 spin_lock_irqsave(&priv->driver_lock, flags);
257
258 priv->dnld_sent = DNLD_RES_RECEIVED;
259
260 /* Wake main thread if commands are pending */
261 if (!priv->cur_cmd || priv->tx_pending_len > 0) {
262 if (!priv->wakeup_dev_required)
263 wake_up_interruptible(&priv->waitq);
264 }
265
266 spin_unlock_irqrestore(&priv->driver_lock, flags);
267 lbs_deb_leave(LBS_DEB_THREAD);
268 }
269 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
270
271 int lbs_set_mac_address(struct net_device *dev, void *addr)
272 {
273 int ret = 0;
274 struct lbs_private *priv = dev->ml_priv;
275 struct sockaddr *phwaddr = addr;
276 struct cmd_ds_802_11_mac_address cmd;
277
278 lbs_deb_enter(LBS_DEB_NET);
279
280 /* In case it was called from the mesh device */
281 dev = priv->dev;
282
283 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
284 cmd.action = cpu_to_le16(CMD_ACT_SET);
285 memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
286
287 ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
288 if (ret) {
289 lbs_deb_net("set MAC address failed\n");
290 goto done;
291 }
292
293 memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
294 memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
295 if (priv->mesh_dev)
296 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
297
298 done:
299 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
300 return ret;
301 }
302
303
304 static inline int mac_in_list(unsigned char *list, int list_len,
305 unsigned char *mac)
306 {
307 while (list_len) {
308 if (!memcmp(list, mac, ETH_ALEN))
309 return 1;
310 list += ETH_ALEN;
311 list_len--;
312 }
313 return 0;
314 }
315
316
317 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
318 struct net_device *dev, int nr_addrs)
319 {
320 int i = nr_addrs;
321 struct dev_mc_list *mc_list;
322
323 if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
324 return nr_addrs;
325
326 netif_addr_lock_bh(dev);
327 for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) {
328 if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) {
329 lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
330 mc_list->dmi_addr);
331 continue;
332 }
333
334 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
335 break;
336 memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN);
337 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
338 mc_list->dmi_addr);
339 i++;
340 }
341 netif_addr_unlock_bh(dev);
342 if (mc_list)
343 return -EOVERFLOW;
344
345 return i;
346 }
347
348 static void lbs_set_mcast_worker(struct work_struct *work)
349 {
350 struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
351 struct cmd_ds_mac_multicast_adr mcast_cmd;
352 int dev_flags;
353 int nr_addrs;
354 int old_mac_control = priv->mac_control;
355
356 lbs_deb_enter(LBS_DEB_NET);
357
358 dev_flags = priv->dev->flags;
359 if (priv->mesh_dev)
360 dev_flags |= priv->mesh_dev->flags;
361
362 if (dev_flags & IFF_PROMISC) {
363 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
364 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
365 CMD_ACT_MAC_MULTICAST_ENABLE);
366 goto out_set_mac_control;
367 } else if (dev_flags & IFF_ALLMULTI) {
368 do_allmulti:
369 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
370 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
371 CMD_ACT_MAC_MULTICAST_ENABLE);
372 goto out_set_mac_control;
373 }
374
375 /* Once for priv->dev, again for priv->mesh_dev if it exists */
376 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
377 if (nr_addrs >= 0 && priv->mesh_dev)
378 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
379 if (nr_addrs < 0)
380 goto do_allmulti;
381
382 if (nr_addrs) {
383 int size = offsetof(struct cmd_ds_mac_multicast_adr,
384 maclist[6*nr_addrs]);
385
386 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
387 mcast_cmd.hdr.size = cpu_to_le16(size);
388 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
389
390 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
391
392 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
393 } else
394 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
395
396 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
397 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
398 out_set_mac_control:
399 if (priv->mac_control != old_mac_control)
400 lbs_set_mac_control(priv);
401
402 lbs_deb_leave(LBS_DEB_NET);
403 }
404
405 void lbs_set_multicast_list(struct net_device *dev)
406 {
407 struct lbs_private *priv = dev->ml_priv;
408
409 schedule_work(&priv->mcast_work);
410 }
411
412 /**
413 * @brief This function handles the major jobs in the LBS driver.
414 * It handles all events generated by firmware, RX data received
415 * from firmware and TX data sent from kernel.
416 *
417 * @param data A pointer to lbs_thread structure
418 * @return 0
419 */
420 static int lbs_thread(void *data)
421 {
422 struct net_device *dev = data;
423 struct lbs_private *priv = dev->ml_priv;
424 wait_queue_t wait;
425
426 lbs_deb_enter(LBS_DEB_THREAD);
427
428 init_waitqueue_entry(&wait, current);
429
430 for (;;) {
431 int shouldsleep;
432 u8 resp_idx;
433
434 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
435 priv->currenttxskb, priv->dnld_sent);
436
437 add_wait_queue(&priv->waitq, &wait);
438 set_current_state(TASK_INTERRUPTIBLE);
439 spin_lock_irq(&priv->driver_lock);
440
441 if (kthread_should_stop())
442 shouldsleep = 0; /* Bye */
443 else if (priv->surpriseremoved)
444 shouldsleep = 1; /* We need to wait until we're _told_ to die */
445 else if (priv->psstate == PS_STATE_SLEEP)
446 shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
447 else if (priv->cmd_timed_out)
448 shouldsleep = 0; /* Command timed out. Recover */
449 else if (!priv->fw_ready)
450 shouldsleep = 1; /* Firmware not ready. We're waiting for it */
451 else if (priv->dnld_sent)
452 shouldsleep = 1; /* Something is en route to the device already */
453 else if (priv->tx_pending_len > 0)
454 shouldsleep = 0; /* We've a packet to send */
455 else if (priv->resp_len[priv->resp_idx])
456 shouldsleep = 0; /* We have a command response */
457 else if (priv->cur_cmd)
458 shouldsleep = 1; /* Can't send a command; one already running */
459 else if (!list_empty(&priv->cmdpendingq) &&
460 !(priv->wakeup_dev_required))
461 shouldsleep = 0; /* We have a command to send */
462 else if (kfifo_len(&priv->event_fifo))
463 shouldsleep = 0; /* We have an event to process */
464 else
465 shouldsleep = 1; /* No command */
466
467 if (shouldsleep) {
468 lbs_deb_thread("sleeping, connect_status %d, "
469 "psmode %d, psstate %d\n",
470 priv->connect_status,
471 priv->psmode, priv->psstate);
472 spin_unlock_irq(&priv->driver_lock);
473 schedule();
474 } else
475 spin_unlock_irq(&priv->driver_lock);
476
477 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
478 priv->currenttxskb, priv->dnld_sent);
479
480 set_current_state(TASK_RUNNING);
481 remove_wait_queue(&priv->waitq, &wait);
482
483 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
484 priv->currenttxskb, priv->dnld_sent);
485
486 if (kthread_should_stop()) {
487 lbs_deb_thread("break from main thread\n");
488 break;
489 }
490
491 if (priv->surpriseremoved) {
492 lbs_deb_thread("adapter removed; waiting to die...\n");
493 continue;
494 }
495
496 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
497 priv->currenttxskb, priv->dnld_sent);
498
499 /* Process any pending command response */
500 spin_lock_irq(&priv->driver_lock);
501 resp_idx = priv->resp_idx;
502 if (priv->resp_len[resp_idx]) {
503 spin_unlock_irq(&priv->driver_lock);
504 lbs_process_command_response(priv,
505 priv->resp_buf[resp_idx],
506 priv->resp_len[resp_idx]);
507 spin_lock_irq(&priv->driver_lock);
508 priv->resp_len[resp_idx] = 0;
509 }
510 spin_unlock_irq(&priv->driver_lock);
511
512 /* Process hardware events, e.g. card removed, link lost */
513 spin_lock_irq(&priv->driver_lock);
514 while (kfifo_len(&priv->event_fifo)) {
515 u32 event;
516
517 if (kfifo_out(&priv->event_fifo,
518 (unsigned char *) &event, sizeof(event)) !=
519 sizeof(event))
520 break;
521 spin_unlock_irq(&priv->driver_lock);
522 lbs_process_event(priv, event);
523 spin_lock_irq(&priv->driver_lock);
524 }
525 spin_unlock_irq(&priv->driver_lock);
526
527 if (priv->wakeup_dev_required) {
528 lbs_deb_thread("Waking up device...\n");
529 /* Wake up device */
530 if (priv->exit_deep_sleep(priv))
531 lbs_deb_thread("Wakeup device failed\n");
532 continue;
533 }
534
535 /* command timeout stuff */
536 if (priv->cmd_timed_out && priv->cur_cmd) {
537 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
538
539 if (++priv->nr_retries > 3) {
540 lbs_pr_info("Excessive timeouts submitting "
541 "command 0x%04x\n",
542 le16_to_cpu(cmdnode->cmdbuf->command));
543 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
544 priv->nr_retries = 0;
545 if (priv->reset_card)
546 priv->reset_card(priv);
547 } else {
548 priv->cur_cmd = NULL;
549 priv->dnld_sent = DNLD_RES_RECEIVED;
550 lbs_pr_info("requeueing command 0x%04x due "
551 "to timeout (#%d)\n",
552 le16_to_cpu(cmdnode->cmdbuf->command),
553 priv->nr_retries);
554
555 /* Stick it back at the _top_ of the pending queue
556 for immediate resubmission */
557 list_add(&cmdnode->list, &priv->cmdpendingq);
558 }
559 }
560 priv->cmd_timed_out = 0;
561
562
563
564 if (!priv->fw_ready)
565 continue;
566
567 /* Check if we need to confirm Sleep Request received previously */
568 if (priv->psstate == PS_STATE_PRE_SLEEP &&
569 !priv->dnld_sent && !priv->cur_cmd) {
570 if (priv->connect_status == LBS_CONNECTED) {
571 lbs_deb_thread("pre-sleep, currenttxskb %p, "
572 "dnld_sent %d, cur_cmd %p\n",
573 priv->currenttxskb, priv->dnld_sent,
574 priv->cur_cmd);
575
576 lbs_ps_confirm_sleep(priv);
577 } else {
578 /* workaround for firmware sending
579 * deauth/linkloss event immediately
580 * after sleep request; remove this
581 * after firmware fixes it
582 */
583 priv->psstate = PS_STATE_AWAKE;
584 lbs_pr_alert("ignore PS_SleepConfirm in "
585 "non-connected state\n");
586 }
587 }
588
589 /* The PS state is changed during processing of Sleep Request
590 * event above
591 */
592 if ((priv->psstate == PS_STATE_SLEEP) ||
593 (priv->psstate == PS_STATE_PRE_SLEEP))
594 continue;
595
596 if (priv->is_deep_sleep)
597 continue;
598
599 /* Execute the next command */
600 if (!priv->dnld_sent && !priv->cur_cmd)
601 lbs_execute_next_command(priv);
602
603 /* Wake-up command waiters which can't sleep in
604 * lbs_prepare_and_send_command
605 */
606 if (!list_empty(&priv->cmdpendingq))
607 wake_up_all(&priv->cmd_pending);
608
609 spin_lock_irq(&priv->driver_lock);
610 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
611 int ret = priv->hw_host_to_card(priv, MVMS_DAT,
612 priv->tx_pending_buf,
613 priv->tx_pending_len);
614 if (ret) {
615 lbs_deb_tx("host_to_card failed %d\n", ret);
616 priv->dnld_sent = DNLD_RES_RECEIVED;
617 }
618 priv->tx_pending_len = 0;
619 if (!priv->currenttxskb) {
620 /* We can wake the queues immediately if we aren't
621 waiting for TX feedback */
622 if (priv->connect_status == LBS_CONNECTED)
623 netif_wake_queue(priv->dev);
624 if (priv->mesh_dev &&
625 priv->mesh_connect_status == LBS_CONNECTED)
626 netif_wake_queue(priv->mesh_dev);
627 }
628 }
629 spin_unlock_irq(&priv->driver_lock);
630 }
631
632 del_timer(&priv->command_timer);
633 del_timer(&priv->auto_deepsleep_timer);
634 wake_up_all(&priv->cmd_pending);
635
636 lbs_deb_leave(LBS_DEB_THREAD);
637 return 0;
638 }
639
640 static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
641 struct cmd_header *cmd)
642 {
643 lbs_deb_enter(LBS_DEB_FW);
644
645 netif_device_detach(priv->dev);
646 if (priv->mesh_dev)
647 netif_device_detach(priv->mesh_dev);
648
649 priv->fw_ready = 0;
650 lbs_deb_leave(LBS_DEB_FW);
651 return 0;
652 }
653
654 int lbs_suspend(struct lbs_private *priv)
655 {
656 struct cmd_header cmd;
657 int ret;
658
659 lbs_deb_enter(LBS_DEB_FW);
660
661 if (priv->wol_criteria == 0xffffffff) {
662 lbs_pr_info("Suspend attempt without configuring wake params!\n");
663 return -EINVAL;
664 }
665
666 memset(&cmd, 0, sizeof(cmd));
667
668 ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
669 sizeof(cmd), lbs_suspend_callback, 0);
670 if (ret)
671 lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
672
673 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
674 return ret;
675 }
676 EXPORT_SYMBOL_GPL(lbs_suspend);
677
678 void lbs_resume(struct lbs_private *priv)
679 {
680 lbs_deb_enter(LBS_DEB_FW);
681
682 priv->fw_ready = 1;
683
684 /* Firmware doesn't seem to give us RX packets any more
685 until we send it some command. Might as well update */
686 lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
687 0, 0, NULL);
688
689 netif_device_attach(priv->dev);
690 if (priv->mesh_dev)
691 netif_device_attach(priv->mesh_dev);
692
693 lbs_deb_leave(LBS_DEB_FW);
694 }
695 EXPORT_SYMBOL_GPL(lbs_resume);
696
697 /**
698 * @brief This function gets the HW spec from the firmware and sets
699 * some basic parameters.
700 *
701 * @param priv A pointer to struct lbs_private structure
702 * @return 0 or -1
703 */
704 static int lbs_setup_firmware(struct lbs_private *priv)
705 {
706 int ret = -1;
707 s16 curlevel = 0, minlevel = 0, maxlevel = 0;
708
709 lbs_deb_enter(LBS_DEB_FW);
710
711 /* Read MAC address from firmware */
712 memset(priv->current_addr, 0xff, ETH_ALEN);
713 ret = lbs_update_hw_spec(priv);
714 if (ret)
715 goto done;
716
717 /* Read power levels if available */
718 ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
719 if (ret == 0) {
720 priv->txpower_cur = curlevel;
721 priv->txpower_min = minlevel;
722 priv->txpower_max = maxlevel;
723 }
724
725 lbs_set_mac_control(priv);
726 done:
727 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
728 return ret;
729 }
730
731 /**
732 * This function handles the timeout of command sending.
733 * It will re-send the same command again.
734 */
735 static void command_timer_fn(unsigned long data)
736 {
737 struct lbs_private *priv = (struct lbs_private *)data;
738 unsigned long flags;
739
740 lbs_deb_enter(LBS_DEB_CMD);
741 spin_lock_irqsave(&priv->driver_lock, flags);
742
743 if (!priv->cur_cmd)
744 goto out;
745
746 lbs_pr_info("command 0x%04x timed out\n",
747 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
748
749 priv->cmd_timed_out = 1;
750 wake_up_interruptible(&priv->waitq);
751 out:
752 spin_unlock_irqrestore(&priv->driver_lock, flags);
753 lbs_deb_leave(LBS_DEB_CMD);
754 }
755
756 /**
757 * This function put the device back to deep sleep mode when timer expires
758 * and no activity (command, event, data etc.) is detected.
759 */
760 static void auto_deepsleep_timer_fn(unsigned long data)
761 {
762 struct lbs_private *priv = (struct lbs_private *)data;
763 int ret;
764
765 lbs_deb_enter(LBS_DEB_CMD);
766
767 if (priv->is_activity_detected) {
768 priv->is_activity_detected = 0;
769 } else {
770 if (priv->is_auto_deep_sleep_enabled &&
771 (!priv->wakeup_dev_required) &&
772 (priv->connect_status != LBS_CONNECTED)) {
773 lbs_deb_main("Entering auto deep sleep mode...\n");
774 ret = lbs_prepare_and_send_command(priv,
775 CMD_802_11_DEEP_SLEEP, 0,
776 0, 0, NULL);
777 if (ret)
778 lbs_pr_err("Enter Deep Sleep command failed\n");
779 }
780 }
781 mod_timer(&priv->auto_deepsleep_timer , jiffies +
782 (priv->auto_deep_sleep_timeout * HZ)/1000);
783 lbs_deb_leave(LBS_DEB_CMD);
784 }
785
786 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
787 {
788 lbs_deb_enter(LBS_DEB_SDIO);
789
790 priv->is_auto_deep_sleep_enabled = 1;
791 if (priv->is_deep_sleep)
792 priv->wakeup_dev_required = 1;
793 mod_timer(&priv->auto_deepsleep_timer ,
794 jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
795
796 lbs_deb_leave(LBS_DEB_SDIO);
797 return 0;
798 }
799
800 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
801 {
802 lbs_deb_enter(LBS_DEB_SDIO);
803
804 priv->is_auto_deep_sleep_enabled = 0;
805 priv->auto_deep_sleep_timeout = 0;
806 del_timer(&priv->auto_deepsleep_timer);
807
808 lbs_deb_leave(LBS_DEB_SDIO);
809 return 0;
810 }
811
812 static void lbs_sync_channel_worker(struct work_struct *work)
813 {
814 struct lbs_private *priv = container_of(work, struct lbs_private,
815 sync_channel);
816
817 lbs_deb_enter(LBS_DEB_MAIN);
818 if (lbs_update_channel(priv))
819 lbs_pr_info("Channel synchronization failed.");
820 lbs_deb_leave(LBS_DEB_MAIN);
821 }
822
823
824 static int lbs_init_adapter(struct lbs_private *priv)
825 {
826 size_t bufsize;
827 int i, ret = 0;
828
829 lbs_deb_enter(LBS_DEB_MAIN);
830
831 /* Allocate buffer to store the BSSID list */
832 bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
833 priv->networks = kzalloc(bufsize, GFP_KERNEL);
834 if (!priv->networks) {
835 lbs_pr_err("Out of memory allocating beacons\n");
836 ret = -1;
837 goto out;
838 }
839
840 /* Initialize scan result lists */
841 INIT_LIST_HEAD(&priv->network_free_list);
842 INIT_LIST_HEAD(&priv->network_list);
843 for (i = 0; i < MAX_NETWORK_COUNT; i++) {
844 list_add_tail(&priv->networks[i].list,
845 &priv->network_free_list);
846 }
847
848 memset(priv->current_addr, 0xff, ETH_ALEN);
849
850 priv->connect_status = LBS_DISCONNECTED;
851 priv->mesh_connect_status = LBS_DISCONNECTED;
852 priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
853 priv->mode = IW_MODE_INFRA;
854 priv->channel = DEFAULT_AD_HOC_CHANNEL;
855 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
856 priv->radio_on = 1;
857 priv->enablehwauto = 1;
858 priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
859 priv->psmode = LBS802_11POWERMODECAM;
860 priv->psstate = PS_STATE_FULL_POWER;
861 priv->is_deep_sleep = 0;
862 priv->is_auto_deep_sleep_enabled = 0;
863 priv->wakeup_dev_required = 0;
864 init_waitqueue_head(&priv->ds_awake_q);
865
866 mutex_init(&priv->lock);
867
868 setup_timer(&priv->command_timer, command_timer_fn,
869 (unsigned long)priv);
870 setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
871 (unsigned long)priv);
872
873 INIT_LIST_HEAD(&priv->cmdfreeq);
874 INIT_LIST_HEAD(&priv->cmdpendingq);
875
876 spin_lock_init(&priv->driver_lock);
877 init_waitqueue_head(&priv->cmd_pending);
878
879 /* Allocate the command buffers */
880 if (lbs_allocate_cmd_buffer(priv)) {
881 lbs_pr_err("Out of memory allocating command buffers\n");
882 ret = -ENOMEM;
883 goto out;
884 }
885 priv->resp_idx = 0;
886 priv->resp_len[0] = priv->resp_len[1] = 0;
887
888 /* Create the event FIFO */
889 ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
890 if (ret) {
891 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
892 goto out;
893 }
894
895 out:
896 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
897
898 return ret;
899 }
900
901 static void lbs_free_adapter(struct lbs_private *priv)
902 {
903 lbs_deb_enter(LBS_DEB_MAIN);
904
905 lbs_free_cmd_buffer(priv);
906 kfifo_free(&priv->event_fifo);
907 del_timer(&priv->command_timer);
908 del_timer(&priv->auto_deepsleep_timer);
909 kfree(priv->networks);
910 priv->networks = NULL;
911
912 lbs_deb_leave(LBS_DEB_MAIN);
913 }
914
915 static const struct net_device_ops lbs_netdev_ops = {
916 .ndo_open = lbs_dev_open,
917 .ndo_stop = lbs_eth_stop,
918 .ndo_start_xmit = lbs_hard_start_xmit,
919 .ndo_set_mac_address = lbs_set_mac_address,
920 .ndo_tx_timeout = lbs_tx_timeout,
921 .ndo_set_multicast_list = lbs_set_multicast_list,
922 .ndo_change_mtu = eth_change_mtu,
923 .ndo_validate_addr = eth_validate_addr,
924 };
925
926 /**
927 * @brief This function adds the card. it will probe the
928 * card, allocate the lbs_priv and initialize the device.
929 *
930 * @param card A pointer to card
931 * @return A pointer to struct lbs_private structure
932 */
933 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
934 {
935 struct net_device *dev;
936 struct wireless_dev *wdev;
937 struct lbs_private *priv = NULL;
938
939 lbs_deb_enter(LBS_DEB_MAIN);
940
941 /* Allocate an Ethernet device and register it */
942 wdev = lbs_cfg_alloc(dmdev);
943 if (IS_ERR(wdev)) {
944 lbs_pr_err("cfg80211 init failed\n");
945 goto done;
946 }
947 /* TODO? */
948 wdev->iftype = NL80211_IFTYPE_STATION;
949 priv = wdev_priv(wdev);
950 priv->wdev = wdev;
951
952 if (lbs_init_adapter(priv)) {
953 lbs_pr_err("failed to initialize adapter structure.\n");
954 goto err_wdev;
955 }
956
957 //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
958 dev = alloc_netdev(0, "wlan%d", ether_setup);
959 if (!dev) {
960 dev_err(dmdev, "no memory for network device instance\n");
961 goto err_adapter;
962 }
963
964 dev->ieee80211_ptr = wdev;
965 dev->ml_priv = priv;
966 SET_NETDEV_DEV(dev, dmdev);
967 wdev->netdev = dev;
968 priv->dev = dev;
969
970 dev->netdev_ops = &lbs_netdev_ops;
971 dev->watchdog_timeo = 5 * HZ;
972 dev->ethtool_ops = &lbs_ethtool_ops;
973 #ifdef WIRELESS_EXT
974 dev->wireless_handlers = &lbs_handler_def;
975 #endif
976 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
977
978
979 // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
980
981
982 priv->card = card;
983 priv->infra_open = 0;
984
985
986 priv->rtap_net_dev = NULL;
987 strcpy(dev->name, "wlan%d");
988
989 lbs_deb_thread("Starting main thread...\n");
990 init_waitqueue_head(&priv->waitq);
991 priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
992 if (IS_ERR(priv->main_thread)) {
993 lbs_deb_thread("Error creating main thread.\n");
994 goto err_ndev;
995 }
996
997 priv->work_thread = create_singlethread_workqueue("lbs_worker");
998 INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
999 INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
1000 INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1001 INIT_WORK(&priv->sync_channel, lbs_sync_channel_worker);
1002
1003 priv->mesh_open = 0;
1004 sprintf(priv->mesh_ssid, "mesh");
1005 priv->mesh_ssid_len = 4;
1006
1007 priv->wol_criteria = 0xffffffff;
1008 priv->wol_gpio = 0xff;
1009
1010 goto done;
1011
1012 err_ndev:
1013 free_netdev(dev);
1014
1015 err_adapter:
1016 lbs_free_adapter(priv);
1017
1018 err_wdev:
1019 lbs_cfg_free(priv);
1020
1021 priv = NULL;
1022
1023 done:
1024 lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1025 return priv;
1026 }
1027 EXPORT_SYMBOL_GPL(lbs_add_card);
1028
1029
1030 void lbs_remove_card(struct lbs_private *priv)
1031 {
1032 struct net_device *dev = priv->dev;
1033
1034 lbs_deb_enter(LBS_DEB_MAIN);
1035
1036 lbs_remove_mesh(priv);
1037 lbs_remove_rtap(priv);
1038
1039 dev = priv->dev;
1040
1041 cancel_delayed_work_sync(&priv->scan_work);
1042 cancel_delayed_work_sync(&priv->assoc_work);
1043 cancel_work_sync(&priv->mcast_work);
1044
1045 /* worker thread destruction blocks on the in-flight command which
1046 * should have been cleared already in lbs_stop_card().
1047 */
1048 lbs_deb_main("destroying worker thread\n");
1049 destroy_workqueue(priv->work_thread);
1050 lbs_deb_main("done destroying worker thread\n");
1051
1052 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1053 priv->psmode = LBS802_11POWERMODECAM;
1054 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1055 }
1056
1057 lbs_send_disconnect_notification(priv);
1058
1059 if (priv->is_deep_sleep) {
1060 priv->is_deep_sleep = 0;
1061 wake_up_interruptible(&priv->ds_awake_q);
1062 }
1063
1064 /* Stop the thread servicing the interrupts */
1065 priv->surpriseremoved = 1;
1066 kthread_stop(priv->main_thread);
1067
1068 lbs_free_adapter(priv);
1069 lbs_cfg_free(priv);
1070
1071 priv->dev = NULL;
1072 free_netdev(dev);
1073
1074 lbs_deb_leave(LBS_DEB_MAIN);
1075 }
1076 EXPORT_SYMBOL_GPL(lbs_remove_card);
1077
1078
1079 int lbs_start_card(struct lbs_private *priv)
1080 {
1081 struct net_device *dev = priv->dev;
1082 int ret = -1;
1083
1084 lbs_deb_enter(LBS_DEB_MAIN);
1085
1086 /* poke the firmware */
1087 ret = lbs_setup_firmware(priv);
1088 if (ret)
1089 goto done;
1090
1091 if (lbs_cfg_register(priv)) {
1092 lbs_pr_err("cannot register device\n");
1093 goto done;
1094 }
1095
1096 lbs_update_channel(priv);
1097
1098 /*
1099 * While rtap isn't related to mesh, only mesh-enabled
1100 * firmware implements the rtap functionality via
1101 * CMD_802_11_MONITOR_MODE.
1102 */
1103 if (lbs_init_mesh(priv)) {
1104 if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
1105 lbs_pr_err("cannot register lbs_rtap attribute\n");
1106 }
1107
1108 lbs_debugfs_init_one(priv, dev);
1109
1110 lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
1111
1112 ret = 0;
1113
1114 done:
1115 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1116 return ret;
1117 }
1118 EXPORT_SYMBOL_GPL(lbs_start_card);
1119
1120
1121 void lbs_stop_card(struct lbs_private *priv)
1122 {
1123 struct net_device *dev;
1124 struct cmd_ctrl_node *cmdnode;
1125 unsigned long flags;
1126
1127 lbs_deb_enter(LBS_DEB_MAIN);
1128
1129 if (!priv)
1130 goto out;
1131 dev = priv->dev;
1132
1133 netif_stop_queue(dev);
1134 netif_carrier_off(dev);
1135
1136 lbs_debugfs_remove_one(priv);
1137 if (lbs_deinit_mesh(priv))
1138 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1139
1140 /* Delete the timeout of the currently processing command */
1141 del_timer_sync(&priv->command_timer);
1142 del_timer_sync(&priv->auto_deepsleep_timer);
1143
1144 /* Flush pending command nodes */
1145 spin_lock_irqsave(&priv->driver_lock, flags);
1146 lbs_deb_main("clearing pending commands\n");
1147 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1148 cmdnode->result = -ENOENT;
1149 cmdnode->cmdwaitqwoken = 1;
1150 wake_up_interruptible(&cmdnode->cmdwait_q);
1151 }
1152
1153 /* Flush the command the card is currently processing */
1154 if (priv->cur_cmd) {
1155 lbs_deb_main("clearing current command\n");
1156 priv->cur_cmd->result = -ENOENT;
1157 priv->cur_cmd->cmdwaitqwoken = 1;
1158 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1159 }
1160 lbs_deb_main("done clearing commands\n");
1161 spin_unlock_irqrestore(&priv->driver_lock, flags);
1162
1163 unregister_netdev(dev);
1164
1165 out:
1166 lbs_deb_leave(LBS_DEB_MAIN);
1167 }
1168 EXPORT_SYMBOL_GPL(lbs_stop_card);
1169
1170
1171 void lbs_queue_event(struct lbs_private *priv, u32 event)
1172 {
1173 unsigned long flags;
1174
1175 lbs_deb_enter(LBS_DEB_THREAD);
1176 spin_lock_irqsave(&priv->driver_lock, flags);
1177
1178 if (priv->psstate == PS_STATE_SLEEP)
1179 priv->psstate = PS_STATE_AWAKE;
1180
1181 kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1182
1183 wake_up_interruptible(&priv->waitq);
1184
1185 spin_unlock_irqrestore(&priv->driver_lock, flags);
1186 lbs_deb_leave(LBS_DEB_THREAD);
1187 }
1188 EXPORT_SYMBOL_GPL(lbs_queue_event);
1189
1190 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1191 {
1192 lbs_deb_enter(LBS_DEB_THREAD);
1193
1194 if (priv->psstate == PS_STATE_SLEEP)
1195 priv->psstate = PS_STATE_AWAKE;
1196
1197 /* Swap buffers by flipping the response index */
1198 BUG_ON(resp_idx > 1);
1199 priv->resp_idx = resp_idx;
1200
1201 wake_up_interruptible(&priv->waitq);
1202
1203 lbs_deb_leave(LBS_DEB_THREAD);
1204 }
1205 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1206
1207 static int __init lbs_init_module(void)
1208 {
1209 lbs_deb_enter(LBS_DEB_MAIN);
1210 memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1211 confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1212 confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1213 confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1214 lbs_debugfs_init();
1215 lbs_deb_leave(LBS_DEB_MAIN);
1216 return 0;
1217 }
1218
1219 static void __exit lbs_exit_module(void)
1220 {
1221 lbs_deb_enter(LBS_DEB_MAIN);
1222 lbs_debugfs_remove();
1223 lbs_deb_leave(LBS_DEB_MAIN);
1224 }
1225
1226 /*
1227 * rtap interface support fuctions
1228 */
1229
1230 static int lbs_rtap_open(struct net_device *dev)
1231 {
1232 /* Yes, _stop_ the queue. Because we don't support injection */
1233 lbs_deb_enter(LBS_DEB_MAIN);
1234 netif_carrier_off(dev);
1235 netif_stop_queue(dev);
1236 lbs_deb_leave(LBS_DEB_LEAVE);
1237 return 0;
1238 }
1239
1240 static int lbs_rtap_stop(struct net_device *dev)
1241 {
1242 lbs_deb_enter(LBS_DEB_MAIN);
1243 lbs_deb_leave(LBS_DEB_MAIN);
1244 return 0;
1245 }
1246
1247 static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
1248 struct net_device *dev)
1249 {
1250 netif_stop_queue(dev);
1251 return NETDEV_TX_BUSY;
1252 }
1253
1254 static void lbs_remove_rtap(struct lbs_private *priv)
1255 {
1256 lbs_deb_enter(LBS_DEB_MAIN);
1257 if (priv->rtap_net_dev == NULL)
1258 goto out;
1259 unregister_netdev(priv->rtap_net_dev);
1260 free_netdev(priv->rtap_net_dev);
1261 priv->rtap_net_dev = NULL;
1262 out:
1263 lbs_deb_leave(LBS_DEB_MAIN);
1264 }
1265
1266 static const struct net_device_ops rtap_netdev_ops = {
1267 .ndo_open = lbs_rtap_open,
1268 .ndo_stop = lbs_rtap_stop,
1269 .ndo_start_xmit = lbs_rtap_hard_start_xmit,
1270 };
1271
1272 static int lbs_add_rtap(struct lbs_private *priv)
1273 {
1274 int ret = 0;
1275 struct net_device *rtap_dev;
1276
1277 lbs_deb_enter(LBS_DEB_MAIN);
1278 if (priv->rtap_net_dev) {
1279 ret = -EPERM;
1280 goto out;
1281 }
1282
1283 rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
1284 if (rtap_dev == NULL) {
1285 ret = -ENOMEM;
1286 goto out;
1287 }
1288
1289 memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
1290 rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
1291 rtap_dev->netdev_ops = &rtap_netdev_ops;
1292 rtap_dev->ml_priv = priv;
1293 SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
1294
1295 ret = register_netdev(rtap_dev);
1296 if (ret) {
1297 free_netdev(rtap_dev);
1298 goto out;
1299 }
1300 priv->rtap_net_dev = rtap_dev;
1301
1302 out:
1303 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1304 return ret;
1305 }
1306
1307 module_init(lbs_init_module);
1308 module_exit(lbs_exit_module);
1309
1310 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1311 MODULE_AUTHOR("Marvell International Ltd.");
1312 MODULE_LICENSE("GPL");
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