xref: /openbmc/linux/drivers/net/wireless/ti/wlcore/cmd.c (revision 6aa7de05)
1 /*
2  * This file is part of wl1271
3  *
4  * Copyright (C) 2009-2010 Nokia Corporation
5  *
6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23 
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/spi/spi.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ieee80211.h>
29 #include <linux/slab.h>
30 
31 #include "wlcore.h"
32 #include "debug.h"
33 #include "io.h"
34 #include "acx.h"
35 #include "wl12xx_80211.h"
36 #include "cmd.h"
37 #include "event.h"
38 #include "tx.h"
39 #include "hw_ops.h"
40 
41 #define WL1271_CMD_FAST_POLL_COUNT       50
42 #define WL1271_WAIT_EVENT_FAST_POLL_COUNT 20
43 
44 /*
45  * send command to firmware
46  *
47  * @wl: wl struct
48  * @id: command id
49  * @buf: buffer containing the command, must work with dma
50  * @len: length of the buffer
51  * return the cmd status code on success.
52  */
53 static int __wlcore_cmd_send(struct wl1271 *wl, u16 id, void *buf,
54 			     size_t len, size_t res_len)
55 {
56 	struct wl1271_cmd_header *cmd;
57 	unsigned long timeout;
58 	u32 intr;
59 	int ret;
60 	u16 status;
61 	u16 poll_count = 0;
62 
63 	if (unlikely(wl->state == WLCORE_STATE_RESTARTING &&
64 		     id != CMD_STOP_FWLOGGER))
65 		return -EIO;
66 
67 	if (WARN_ON_ONCE(len < sizeof(*cmd)))
68 		return -EIO;
69 
70 	cmd = buf;
71 	cmd->id = cpu_to_le16(id);
72 	cmd->status = 0;
73 
74 	WARN_ON(len % 4 != 0);
75 	WARN_ON(test_bit(WL1271_FLAG_IN_ELP, &wl->flags));
76 
77 	ret = wlcore_write(wl, wl->cmd_box_addr, buf, len, false);
78 	if (ret < 0)
79 		return ret;
80 
81 	/*
82 	 * TODO: we just need this because one bit is in a different
83 	 * place.  Is there any better way?
84 	 */
85 	ret = wl->ops->trigger_cmd(wl, wl->cmd_box_addr, buf, len);
86 	if (ret < 0)
87 		return ret;
88 
89 	timeout = jiffies + msecs_to_jiffies(WL1271_COMMAND_TIMEOUT);
90 
91 	ret = wlcore_read_reg(wl, REG_INTERRUPT_NO_CLEAR, &intr);
92 	if (ret < 0)
93 		return ret;
94 
95 	while (!(intr & WL1271_ACX_INTR_CMD_COMPLETE)) {
96 		if (time_after(jiffies, timeout)) {
97 			wl1271_error("command complete timeout");
98 			return -ETIMEDOUT;
99 		}
100 
101 		poll_count++;
102 		if (poll_count < WL1271_CMD_FAST_POLL_COUNT)
103 			udelay(10);
104 		else
105 			msleep(1);
106 
107 		ret = wlcore_read_reg(wl, REG_INTERRUPT_NO_CLEAR, &intr);
108 		if (ret < 0)
109 			return ret;
110 	}
111 
112 	/* read back the status code of the command */
113 	if (res_len == 0)
114 		res_len = sizeof(struct wl1271_cmd_header);
115 
116 	ret = wlcore_read(wl, wl->cmd_box_addr, cmd, res_len, false);
117 	if (ret < 0)
118 		return ret;
119 
120 	status = le16_to_cpu(cmd->status);
121 
122 	ret = wlcore_write_reg(wl, REG_INTERRUPT_ACK,
123 			       WL1271_ACX_INTR_CMD_COMPLETE);
124 	if (ret < 0)
125 		return ret;
126 
127 	return status;
128 }
129 
130 /*
131  * send command to fw and return cmd status on success
132  * valid_rets contains a bitmap of allowed error codes
133  */
134 static int wlcore_cmd_send_failsafe(struct wl1271 *wl, u16 id, void *buf,
135 				    size_t len, size_t res_len,
136 				    unsigned long valid_rets)
137 {
138 	int ret = __wlcore_cmd_send(wl, id, buf, len, res_len);
139 
140 	if (ret < 0)
141 		goto fail;
142 
143 	/* success is always a valid status */
144 	valid_rets |= BIT(CMD_STATUS_SUCCESS);
145 
146 	if (ret >= MAX_COMMAND_STATUS ||
147 	    !test_bit(ret, &valid_rets)) {
148 		wl1271_error("command execute failure %d", ret);
149 		ret = -EIO;
150 		goto fail;
151 	}
152 	return ret;
153 fail:
154 	wl12xx_queue_recovery_work(wl);
155 	return ret;
156 }
157 
158 /*
159  * wrapper for wlcore_cmd_send that accept only CMD_STATUS_SUCCESS
160  * return 0 on success.
161  */
162 int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len,
163 		    size_t res_len)
164 {
165 	int ret = wlcore_cmd_send_failsafe(wl, id, buf, len, res_len, 0);
166 
167 	if (ret < 0)
168 		return ret;
169 	return 0;
170 }
171 EXPORT_SYMBOL_GPL(wl1271_cmd_send);
172 
173 /*
174  * Poll the mailbox event field until any of the bits in the mask is set or a
175  * timeout occurs (WL1271_EVENT_TIMEOUT in msecs)
176  */
177 int wlcore_cmd_wait_for_event_or_timeout(struct wl1271 *wl,
178 					 u32 mask, bool *timeout)
179 {
180 	u32 *events_vector;
181 	u32 event;
182 	unsigned long timeout_time;
183 	u16 poll_count = 0;
184 	int ret = 0;
185 
186 	*timeout = false;
187 
188 	events_vector = kmalloc(sizeof(*events_vector), GFP_KERNEL | GFP_DMA);
189 	if (!events_vector)
190 		return -ENOMEM;
191 
192 	timeout_time = jiffies + msecs_to_jiffies(WL1271_EVENT_TIMEOUT);
193 
194 	do {
195 		if (time_after(jiffies, timeout_time)) {
196 			wl1271_debug(DEBUG_CMD, "timeout waiting for event %d",
197 				     (int)mask);
198 			*timeout = true;
199 			goto out;
200 		}
201 
202 		poll_count++;
203 		if (poll_count < WL1271_WAIT_EVENT_FAST_POLL_COUNT)
204 			usleep_range(50, 51);
205 		else
206 			usleep_range(1000, 5000);
207 
208 		/* read from both event fields */
209 		ret = wlcore_read(wl, wl->mbox_ptr[0], events_vector,
210 				  sizeof(*events_vector), false);
211 		if (ret < 0)
212 			goto out;
213 
214 		event = *events_vector & mask;
215 
216 		ret = wlcore_read(wl, wl->mbox_ptr[1], events_vector,
217 				  sizeof(*events_vector), false);
218 		if (ret < 0)
219 			goto out;
220 
221 		event |= *events_vector & mask;
222 	} while (!event);
223 
224 out:
225 	kfree(events_vector);
226 	return ret;
227 }
228 EXPORT_SYMBOL_GPL(wlcore_cmd_wait_for_event_or_timeout);
229 
230 int wl12xx_cmd_role_enable(struct wl1271 *wl, u8 *addr, u8 role_type,
231 			   u8 *role_id)
232 {
233 	struct wl12xx_cmd_role_enable *cmd;
234 	int ret;
235 
236 	wl1271_debug(DEBUG_CMD, "cmd role enable");
237 
238 	if (WARN_ON(*role_id != WL12XX_INVALID_ROLE_ID))
239 		return -EBUSY;
240 
241 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
242 	if (!cmd) {
243 		ret = -ENOMEM;
244 		goto out;
245 	}
246 
247 	/* get role id */
248 	cmd->role_id = find_first_zero_bit(wl->roles_map, WL12XX_MAX_ROLES);
249 	if (cmd->role_id >= WL12XX_MAX_ROLES) {
250 		ret = -EBUSY;
251 		goto out_free;
252 	}
253 
254 	memcpy(cmd->mac_address, addr, ETH_ALEN);
255 	cmd->role_type = role_type;
256 
257 	ret = wl1271_cmd_send(wl, CMD_ROLE_ENABLE, cmd, sizeof(*cmd), 0);
258 	if (ret < 0) {
259 		wl1271_error("failed to initiate cmd role enable");
260 		goto out_free;
261 	}
262 
263 	__set_bit(cmd->role_id, wl->roles_map);
264 	*role_id = cmd->role_id;
265 
266 out_free:
267 	kfree(cmd);
268 
269 out:
270 	return ret;
271 }
272 
273 int wl12xx_cmd_role_disable(struct wl1271 *wl, u8 *role_id)
274 {
275 	struct wl12xx_cmd_role_disable *cmd;
276 	int ret;
277 
278 	wl1271_debug(DEBUG_CMD, "cmd role disable");
279 
280 	if (WARN_ON(*role_id == WL12XX_INVALID_ROLE_ID))
281 		return -ENOENT;
282 
283 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
284 	if (!cmd) {
285 		ret = -ENOMEM;
286 		goto out;
287 	}
288 	cmd->role_id = *role_id;
289 
290 	ret = wl1271_cmd_send(wl, CMD_ROLE_DISABLE, cmd, sizeof(*cmd), 0);
291 	if (ret < 0) {
292 		wl1271_error("failed to initiate cmd role disable");
293 		goto out_free;
294 	}
295 
296 	__clear_bit(*role_id, wl->roles_map);
297 	*role_id = WL12XX_INVALID_ROLE_ID;
298 
299 out_free:
300 	kfree(cmd);
301 
302 out:
303 	return ret;
304 }
305 
306 static int wlcore_get_new_session_id(struct wl1271 *wl, u8 hlid)
307 {
308 	if (wl->session_ids[hlid] >= SESSION_COUNTER_MAX)
309 		wl->session_ids[hlid] = 0;
310 
311 	wl->session_ids[hlid]++;
312 
313 	return wl->session_ids[hlid];
314 }
315 
316 int wl12xx_allocate_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
317 {
318 	unsigned long flags;
319 	u8 link = find_first_zero_bit(wl->links_map, wl->num_links);
320 	if (link >= wl->num_links)
321 		return -EBUSY;
322 
323 	wl->session_ids[link] = wlcore_get_new_session_id(wl, link);
324 
325 	/* these bits are used by op_tx */
326 	spin_lock_irqsave(&wl->wl_lock, flags);
327 	__set_bit(link, wl->links_map);
328 	__set_bit(link, wlvif->links_map);
329 	spin_unlock_irqrestore(&wl->wl_lock, flags);
330 
331 	/*
332 	 * take the last "freed packets" value from the current FW status.
333 	 * on recovery, we might not have fw_status yet, and
334 	 * tx_lnk_free_pkts will be NULL. check for it.
335 	 */
336 	if (wl->fw_status->counters.tx_lnk_free_pkts)
337 		wl->links[link].prev_freed_pkts =
338 			wl->fw_status->counters.tx_lnk_free_pkts[link];
339 	wl->links[link].wlvif = wlvif;
340 
341 	/*
342 	 * Take saved value for total freed packets from wlvif, in case this is
343 	 * recovery/resume
344 	 */
345 	if (wlvif->bss_type != BSS_TYPE_AP_BSS)
346 		wl->links[link].total_freed_pkts = wlvif->total_freed_pkts;
347 
348 	*hlid = link;
349 
350 	wl->active_link_count++;
351 	return 0;
352 }
353 
354 void wl12xx_free_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
355 {
356 	unsigned long flags;
357 
358 	if (*hlid == WL12XX_INVALID_LINK_ID)
359 		return;
360 
361 	/* these bits are used by op_tx */
362 	spin_lock_irqsave(&wl->wl_lock, flags);
363 	__clear_bit(*hlid, wl->links_map);
364 	__clear_bit(*hlid, wlvif->links_map);
365 	spin_unlock_irqrestore(&wl->wl_lock, flags);
366 
367 	wl->links[*hlid].allocated_pkts = 0;
368 	wl->links[*hlid].prev_freed_pkts = 0;
369 	wl->links[*hlid].ba_bitmap = 0;
370 	eth_zero_addr(wl->links[*hlid].addr);
371 
372 	/*
373 	 * At this point op_tx() will not add more packets to the queues. We
374 	 * can purge them.
375 	 */
376 	wl1271_tx_reset_link_queues(wl, *hlid);
377 	wl->links[*hlid].wlvif = NULL;
378 
379 	if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
380 	    *hlid == wlvif->ap.bcast_hlid) {
381 		u32 sqn_padding = WL1271_TX_SQN_POST_RECOVERY_PADDING;
382 		/*
383 		 * save the total freed packets in the wlvif, in case this is
384 		 * recovery or suspend
385 		 */
386 		wlvif->total_freed_pkts = wl->links[*hlid].total_freed_pkts;
387 
388 		/*
389 		 * increment the initial seq number on recovery to account for
390 		 * transmitted packets that we haven't yet got in the FW status
391 		 */
392 		if (wlvif->encryption_type == KEY_GEM)
393 			sqn_padding = WL1271_TX_SQN_POST_RECOVERY_PADDING_GEM;
394 
395 		if (test_bit(WL1271_FLAG_RECOVERY_IN_PROGRESS, &wl->flags))
396 			wlvif->total_freed_pkts += sqn_padding;
397 	}
398 
399 	wl->links[*hlid].total_freed_pkts = 0;
400 
401 	*hlid = WL12XX_INVALID_LINK_ID;
402 	wl->active_link_count--;
403 	WARN_ON_ONCE(wl->active_link_count < 0);
404 }
405 
406 u8 wlcore_get_native_channel_type(u8 nl_channel_type)
407 {
408 	switch (nl_channel_type) {
409 	case NL80211_CHAN_NO_HT:
410 		return WLCORE_CHAN_NO_HT;
411 	case NL80211_CHAN_HT20:
412 		return WLCORE_CHAN_HT20;
413 	case NL80211_CHAN_HT40MINUS:
414 		return WLCORE_CHAN_HT40MINUS;
415 	case NL80211_CHAN_HT40PLUS:
416 		return WLCORE_CHAN_HT40PLUS;
417 	default:
418 		WARN_ON(1);
419 		return WLCORE_CHAN_NO_HT;
420 	}
421 }
422 EXPORT_SYMBOL_GPL(wlcore_get_native_channel_type);
423 
424 static int wl12xx_cmd_role_start_dev(struct wl1271 *wl,
425 				     struct wl12xx_vif *wlvif,
426 				     enum nl80211_band band,
427 				     int channel)
428 {
429 	struct wl12xx_cmd_role_start *cmd;
430 	int ret;
431 
432 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
433 	if (!cmd) {
434 		ret = -ENOMEM;
435 		goto out;
436 	}
437 
438 	wl1271_debug(DEBUG_CMD, "cmd role start dev %d", wlvif->dev_role_id);
439 
440 	cmd->role_id = wlvif->dev_role_id;
441 	if (band == NL80211_BAND_5GHZ)
442 		cmd->band = WLCORE_BAND_5GHZ;
443 	cmd->channel = channel;
444 
445 	if (wlvif->dev_hlid == WL12XX_INVALID_LINK_ID) {
446 		ret = wl12xx_allocate_link(wl, wlvif, &wlvif->dev_hlid);
447 		if (ret)
448 			goto out_free;
449 	}
450 	cmd->device.hlid = wlvif->dev_hlid;
451 	cmd->device.session = wl->session_ids[wlvif->dev_hlid];
452 
453 	wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d",
454 		     cmd->role_id, cmd->device.hlid, cmd->device.session);
455 
456 	ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
457 	if (ret < 0) {
458 		wl1271_error("failed to initiate cmd role enable");
459 		goto err_hlid;
460 	}
461 
462 	goto out_free;
463 
464 err_hlid:
465 	/* clear links on error */
466 	wl12xx_free_link(wl, wlvif, &wlvif->dev_hlid);
467 
468 out_free:
469 	kfree(cmd);
470 
471 out:
472 	return ret;
473 }
474 
475 static int wl12xx_cmd_role_stop_dev(struct wl1271 *wl,
476 				    struct wl12xx_vif *wlvif)
477 {
478 	struct wl12xx_cmd_role_stop *cmd;
479 	int ret;
480 
481 	if (WARN_ON(wlvif->dev_hlid == WL12XX_INVALID_LINK_ID))
482 		return -EINVAL;
483 
484 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
485 	if (!cmd) {
486 		ret = -ENOMEM;
487 		goto out;
488 	}
489 
490 	wl1271_debug(DEBUG_CMD, "cmd role stop dev");
491 
492 	cmd->role_id = wlvif->dev_role_id;
493 	cmd->disc_type = DISCONNECT_IMMEDIATE;
494 	cmd->reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);
495 
496 	ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
497 	if (ret < 0) {
498 		wl1271_error("failed to initiate cmd role stop");
499 		goto out_free;
500 	}
501 
502 	wl12xx_free_link(wl, wlvif, &wlvif->dev_hlid);
503 
504 out_free:
505 	kfree(cmd);
506 
507 out:
508 	return ret;
509 }
510 
511 int wl12xx_cmd_role_start_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif)
512 {
513 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
514 	struct wl12xx_cmd_role_start *cmd;
515 	u32 supported_rates;
516 	int ret;
517 
518 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
519 	if (!cmd) {
520 		ret = -ENOMEM;
521 		goto out;
522 	}
523 
524 	wl1271_debug(DEBUG_CMD, "cmd role start sta %d", wlvif->role_id);
525 
526 	cmd->role_id = wlvif->role_id;
527 	if (wlvif->band == NL80211_BAND_5GHZ)
528 		cmd->band = WLCORE_BAND_5GHZ;
529 	cmd->channel = wlvif->channel;
530 	cmd->sta.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
531 	cmd->sta.beacon_interval = cpu_to_le16(wlvif->beacon_int);
532 	cmd->sta.ssid_type = WL12XX_SSID_TYPE_ANY;
533 	cmd->sta.ssid_len = wlvif->ssid_len;
534 	memcpy(cmd->sta.ssid, wlvif->ssid, wlvif->ssid_len);
535 	memcpy(cmd->sta.bssid, vif->bss_conf.bssid, ETH_ALEN);
536 
537 	supported_rates = CONF_TX_ENABLED_RATES | CONF_TX_MCS_RATES |
538 			  wlcore_hw_sta_get_ap_rate_mask(wl, wlvif);
539 	if (wlvif->p2p)
540 		supported_rates &= ~CONF_TX_CCK_RATES;
541 
542 	cmd->sta.local_rates = cpu_to_le32(supported_rates);
543 
544 	cmd->channel_type = wlcore_get_native_channel_type(wlvif->channel_type);
545 
546 	if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID) {
547 		ret = wl12xx_allocate_link(wl, wlvif, &wlvif->sta.hlid);
548 		if (ret)
549 			goto out_free;
550 	}
551 	cmd->sta.hlid = wlvif->sta.hlid;
552 	cmd->sta.session = wl->session_ids[wlvif->sta.hlid];
553 	/*
554 	 * We don't have the correct remote rates in this stage.  The
555 	 * rates will be reconfigured later, after association, if the
556 	 * firmware supports ACX_PEER_CAP.  Otherwise, there's nothing
557 	 * we can do, so use all supported_rates here.
558 	 */
559 	cmd->sta.remote_rates = cpu_to_le32(supported_rates);
560 
561 	wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d "
562 		     "basic_rate_set: 0x%x, remote_rates: 0x%x",
563 		     wlvif->role_id, cmd->sta.hlid, cmd->sta.session,
564 		     wlvif->basic_rate_set, wlvif->rate_set);
565 
566 	ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
567 	if (ret < 0) {
568 		wl1271_error("failed to initiate cmd role start sta");
569 		goto err_hlid;
570 	}
571 
572 	wlvif->sta.role_chan_type = wlvif->channel_type;
573 	goto out_free;
574 
575 err_hlid:
576 	/* clear links on error. */
577 	wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);
578 
579 out_free:
580 	kfree(cmd);
581 
582 out:
583 	return ret;
584 }
585 
586 /* use this function to stop ibss as well */
587 int wl12xx_cmd_role_stop_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif)
588 {
589 	struct wl12xx_cmd_role_stop *cmd;
590 	int ret;
591 
592 	if (WARN_ON(wlvif->sta.hlid == WL12XX_INVALID_LINK_ID))
593 		return -EINVAL;
594 
595 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
596 	if (!cmd) {
597 		ret = -ENOMEM;
598 		goto out;
599 	}
600 
601 	wl1271_debug(DEBUG_CMD, "cmd role stop sta %d", wlvif->role_id);
602 
603 	cmd->role_id = wlvif->role_id;
604 	cmd->disc_type = DISCONNECT_IMMEDIATE;
605 	cmd->reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);
606 
607 	ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
608 	if (ret < 0) {
609 		wl1271_error("failed to initiate cmd role stop sta");
610 		goto out_free;
611 	}
612 
613 	wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);
614 
615 out_free:
616 	kfree(cmd);
617 
618 out:
619 	return ret;
620 }
621 
622 int wl12xx_cmd_role_start_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif)
623 {
624 	struct wl12xx_cmd_role_start *cmd;
625 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
626 	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
627 	u32 supported_rates;
628 	int ret;
629 
630 	wl1271_debug(DEBUG_CMD, "cmd role start ap %d", wlvif->role_id);
631 
632 	/* If MESH --> ssid_len is always 0 */
633 	if (!ieee80211_vif_is_mesh(vif)) {
634 		/* trying to use hidden SSID with an old hostapd version */
635 		if (wlvif->ssid_len == 0 && !bss_conf->hidden_ssid) {
636 			wl1271_error("got a null SSID from beacon/bss");
637 			ret = -EINVAL;
638 			goto out;
639 		}
640 	}
641 
642 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
643 	if (!cmd) {
644 		ret = -ENOMEM;
645 		goto out;
646 	}
647 
648 	ret = wl12xx_allocate_link(wl, wlvif, &wlvif->ap.global_hlid);
649 	if (ret < 0)
650 		goto out_free;
651 
652 	ret = wl12xx_allocate_link(wl, wlvif, &wlvif->ap.bcast_hlid);
653 	if (ret < 0)
654 		goto out_free_global;
655 
656 	/* use the previous security seq, if this is a recovery/resume */
657 	wl->links[wlvif->ap.bcast_hlid].total_freed_pkts =
658 						wlvif->total_freed_pkts;
659 
660 	cmd->role_id = wlvif->role_id;
661 	cmd->ap.aging_period = cpu_to_le16(wl->conf.tx.ap_aging_period);
662 	cmd->ap.bss_index = WL1271_AP_BSS_INDEX;
663 	cmd->ap.global_hlid = wlvif->ap.global_hlid;
664 	cmd->ap.broadcast_hlid = wlvif->ap.bcast_hlid;
665 	cmd->ap.global_session_id = wl->session_ids[wlvif->ap.global_hlid];
666 	cmd->ap.bcast_session_id = wl->session_ids[wlvif->ap.bcast_hlid];
667 	cmd->ap.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
668 	cmd->ap.beacon_interval = cpu_to_le16(wlvif->beacon_int);
669 	cmd->ap.dtim_interval = bss_conf->dtim_period;
670 	cmd->ap.beacon_expiry = WL1271_AP_DEF_BEACON_EXP;
671 	/* FIXME: Change when adding DFS */
672 	cmd->ap.reset_tsf = 1;  /* By default reset AP TSF */
673 	cmd->ap.wmm = wlvif->wmm_enabled;
674 	cmd->channel = wlvif->channel;
675 	cmd->channel_type = wlcore_get_native_channel_type(wlvif->channel_type);
676 
677 	if (!bss_conf->hidden_ssid) {
678 		/* take the SSID from the beacon for backward compatibility */
679 		cmd->ap.ssid_type = WL12XX_SSID_TYPE_PUBLIC;
680 		cmd->ap.ssid_len = wlvif->ssid_len;
681 		memcpy(cmd->ap.ssid, wlvif->ssid, wlvif->ssid_len);
682 	} else {
683 		cmd->ap.ssid_type = WL12XX_SSID_TYPE_HIDDEN;
684 		cmd->ap.ssid_len = bss_conf->ssid_len;
685 		memcpy(cmd->ap.ssid, bss_conf->ssid, bss_conf->ssid_len);
686 	}
687 
688 	supported_rates = CONF_TX_ENABLED_RATES | CONF_TX_MCS_RATES |
689 		wlcore_hw_ap_get_mimo_wide_rate_mask(wl, wlvif);
690 	if (wlvif->p2p)
691 		supported_rates &= ~CONF_TX_CCK_RATES;
692 
693 	wl1271_debug(DEBUG_CMD, "cmd role start ap with supported_rates 0x%08x",
694 		     supported_rates);
695 
696 	cmd->ap.local_rates = cpu_to_le32(supported_rates);
697 
698 	switch (wlvif->band) {
699 	case NL80211_BAND_2GHZ:
700 		cmd->band = WLCORE_BAND_2_4GHZ;
701 		break;
702 	case NL80211_BAND_5GHZ:
703 		cmd->band = WLCORE_BAND_5GHZ;
704 		break;
705 	default:
706 		wl1271_warning("ap start - unknown band: %d", (int)wlvif->band);
707 		cmd->band = WLCORE_BAND_2_4GHZ;
708 		break;
709 	}
710 
711 	ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
712 	if (ret < 0) {
713 		wl1271_error("failed to initiate cmd role start ap");
714 		goto out_free_bcast;
715 	}
716 
717 	goto out_free;
718 
719 out_free_bcast:
720 	wl12xx_free_link(wl, wlvif, &wlvif->ap.bcast_hlid);
721 
722 out_free_global:
723 	wl12xx_free_link(wl, wlvif, &wlvif->ap.global_hlid);
724 
725 out_free:
726 	kfree(cmd);
727 
728 out:
729 	return ret;
730 }
731 
732 int wl12xx_cmd_role_stop_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif)
733 {
734 	struct wl12xx_cmd_role_stop *cmd;
735 	int ret;
736 
737 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
738 	if (!cmd) {
739 		ret = -ENOMEM;
740 		goto out;
741 	}
742 
743 	wl1271_debug(DEBUG_CMD, "cmd role stop ap %d", wlvif->role_id);
744 
745 	cmd->role_id = wlvif->role_id;
746 
747 	ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
748 	if (ret < 0) {
749 		wl1271_error("failed to initiate cmd role stop ap");
750 		goto out_free;
751 	}
752 
753 	wl12xx_free_link(wl, wlvif, &wlvif->ap.bcast_hlid);
754 	wl12xx_free_link(wl, wlvif, &wlvif->ap.global_hlid);
755 
756 out_free:
757 	kfree(cmd);
758 
759 out:
760 	return ret;
761 }
762 
763 int wl12xx_cmd_role_start_ibss(struct wl1271 *wl, struct wl12xx_vif *wlvif)
764 {
765 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
766 	struct wl12xx_cmd_role_start *cmd;
767 	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
768 	int ret;
769 
770 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
771 	if (!cmd) {
772 		ret = -ENOMEM;
773 		goto out;
774 	}
775 
776 	wl1271_debug(DEBUG_CMD, "cmd role start ibss %d", wlvif->role_id);
777 
778 	cmd->role_id = wlvif->role_id;
779 	if (wlvif->band == NL80211_BAND_5GHZ)
780 		cmd->band = WLCORE_BAND_5GHZ;
781 	cmd->channel = wlvif->channel;
782 	cmd->ibss.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
783 	cmd->ibss.beacon_interval = cpu_to_le16(wlvif->beacon_int);
784 	cmd->ibss.dtim_interval = bss_conf->dtim_period;
785 	cmd->ibss.ssid_type = WL12XX_SSID_TYPE_ANY;
786 	cmd->ibss.ssid_len = wlvif->ssid_len;
787 	memcpy(cmd->ibss.ssid, wlvif->ssid, wlvif->ssid_len);
788 	memcpy(cmd->ibss.bssid, vif->bss_conf.bssid, ETH_ALEN);
789 	cmd->sta.local_rates = cpu_to_le32(wlvif->rate_set);
790 
791 	if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID) {
792 		ret = wl12xx_allocate_link(wl, wlvif, &wlvif->sta.hlid);
793 		if (ret)
794 			goto out_free;
795 	}
796 	cmd->ibss.hlid = wlvif->sta.hlid;
797 	cmd->ibss.remote_rates = cpu_to_le32(wlvif->rate_set);
798 
799 	wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d "
800 		     "basic_rate_set: 0x%x, remote_rates: 0x%x",
801 		     wlvif->role_id, cmd->sta.hlid, cmd->sta.session,
802 		     wlvif->basic_rate_set, wlvif->rate_set);
803 
804 	wl1271_debug(DEBUG_CMD, "vif->bss_conf.bssid = %pM",
805 		     vif->bss_conf.bssid);
806 
807 	ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
808 	if (ret < 0) {
809 		wl1271_error("failed to initiate cmd role enable");
810 		goto err_hlid;
811 	}
812 
813 	goto out_free;
814 
815 err_hlid:
816 	/* clear links on error. */
817 	wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);
818 
819 out_free:
820 	kfree(cmd);
821 
822 out:
823 	return ret;
824 }
825 
826 
827 /**
828  * send test command to firmware
829  *
830  * @wl: wl struct
831  * @buf: buffer containing the command, with all headers, must work with dma
832  * @len: length of the buffer
833  * @answer: is answer needed
834  */
835 int wl1271_cmd_test(struct wl1271 *wl, void *buf, size_t buf_len, u8 answer)
836 {
837 	int ret;
838 	size_t res_len = 0;
839 
840 	wl1271_debug(DEBUG_CMD, "cmd test");
841 
842 	if (answer)
843 		res_len = buf_len;
844 
845 	ret = wl1271_cmd_send(wl, CMD_TEST, buf, buf_len, res_len);
846 
847 	if (ret < 0) {
848 		wl1271_warning("TEST command failed");
849 		return ret;
850 	}
851 
852 	return ret;
853 }
854 EXPORT_SYMBOL_GPL(wl1271_cmd_test);
855 
856 /**
857  * read acx from firmware
858  *
859  * @wl: wl struct
860  * @id: acx id
861  * @buf: buffer for the response, including all headers, must work with dma
862  * @len: length of buf
863  */
864 int wl1271_cmd_interrogate(struct wl1271 *wl, u16 id, void *buf,
865 			   size_t cmd_len, size_t res_len)
866 {
867 	struct acx_header *acx = buf;
868 	int ret;
869 
870 	wl1271_debug(DEBUG_CMD, "cmd interrogate");
871 
872 	acx->id = cpu_to_le16(id);
873 
874 	/* response payload length, does not include any headers */
875 	acx->len = cpu_to_le16(res_len - sizeof(*acx));
876 
877 	ret = wl1271_cmd_send(wl, CMD_INTERROGATE, acx, cmd_len, res_len);
878 	if (ret < 0)
879 		wl1271_error("INTERROGATE command failed");
880 
881 	return ret;
882 }
883 
884 /**
885  * write acx value to firmware
886  *
887  * @wl: wl struct
888  * @id: acx id
889  * @buf: buffer containing acx, including all headers, must work with dma
890  * @len: length of buf
891  * @valid_rets: bitmap of valid cmd status codes (i.e. return values).
892  * return the cmd status on success.
893  */
894 int wlcore_cmd_configure_failsafe(struct wl1271 *wl, u16 id, void *buf,
895 				  size_t len, unsigned long valid_rets)
896 {
897 	struct acx_header *acx = buf;
898 	int ret;
899 
900 	wl1271_debug(DEBUG_CMD, "cmd configure (%d)", id);
901 
902 	if (WARN_ON_ONCE(len < sizeof(*acx)))
903 		return -EIO;
904 
905 	acx->id = cpu_to_le16(id);
906 
907 	/* payload length, does not include any headers */
908 	acx->len = cpu_to_le16(len - sizeof(*acx));
909 
910 	ret = wlcore_cmd_send_failsafe(wl, CMD_CONFIGURE, acx, len, 0,
911 				       valid_rets);
912 	if (ret < 0) {
913 		wl1271_warning("CONFIGURE command NOK");
914 		return ret;
915 	}
916 
917 	return ret;
918 }
919 
920 /*
921  * wrapper for wlcore_cmd_configure that accepts only success status.
922  * return 0 on success
923  */
924 int wl1271_cmd_configure(struct wl1271 *wl, u16 id, void *buf, size_t len)
925 {
926 	int ret = wlcore_cmd_configure_failsafe(wl, id, buf, len, 0);
927 
928 	if (ret < 0)
929 		return ret;
930 	return 0;
931 }
932 EXPORT_SYMBOL_GPL(wl1271_cmd_configure);
933 
934 int wl1271_cmd_data_path(struct wl1271 *wl, bool enable)
935 {
936 	struct cmd_enabledisable_path *cmd;
937 	int ret;
938 	u16 cmd_rx, cmd_tx;
939 
940 	wl1271_debug(DEBUG_CMD, "cmd data path");
941 
942 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
943 	if (!cmd) {
944 		ret = -ENOMEM;
945 		goto out;
946 	}
947 
948 	/* the channel here is only used for calibration, so hardcoded to 1 */
949 	cmd->channel = 1;
950 
951 	if (enable) {
952 		cmd_rx = CMD_ENABLE_RX;
953 		cmd_tx = CMD_ENABLE_TX;
954 	} else {
955 		cmd_rx = CMD_DISABLE_RX;
956 		cmd_tx = CMD_DISABLE_TX;
957 	}
958 
959 	ret = wl1271_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd), 0);
960 	if (ret < 0) {
961 		wl1271_error("rx %s cmd for channel %d failed",
962 			     enable ? "start" : "stop", cmd->channel);
963 		goto out;
964 	}
965 
966 	wl1271_debug(DEBUG_BOOT, "rx %s cmd channel %d",
967 		     enable ? "start" : "stop", cmd->channel);
968 
969 	ret = wl1271_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd), 0);
970 	if (ret < 0) {
971 		wl1271_error("tx %s cmd for channel %d failed",
972 			     enable ? "start" : "stop", cmd->channel);
973 		goto out;
974 	}
975 
976 	wl1271_debug(DEBUG_BOOT, "tx %s cmd channel %d",
977 		     enable ? "start" : "stop", cmd->channel);
978 
979 out:
980 	kfree(cmd);
981 	return ret;
982 }
983 EXPORT_SYMBOL_GPL(wl1271_cmd_data_path);
984 
985 int wl1271_cmd_ps_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
986 		       u8 ps_mode, u16 auto_ps_timeout)
987 {
988 	struct wl1271_cmd_ps_params *ps_params = NULL;
989 	int ret = 0;
990 
991 	wl1271_debug(DEBUG_CMD, "cmd set ps mode");
992 
993 	ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
994 	if (!ps_params) {
995 		ret = -ENOMEM;
996 		goto out;
997 	}
998 
999 	ps_params->role_id = wlvif->role_id;
1000 	ps_params->ps_mode = ps_mode;
1001 	ps_params->auto_ps_timeout = auto_ps_timeout;
1002 
1003 	ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
1004 			      sizeof(*ps_params), 0);
1005 	if (ret < 0) {
1006 		wl1271_error("cmd set_ps_mode failed");
1007 		goto out;
1008 	}
1009 
1010 out:
1011 	kfree(ps_params);
1012 	return ret;
1013 }
1014 
1015 int wl1271_cmd_template_set(struct wl1271 *wl, u8 role_id,
1016 			    u16 template_id, void *buf, size_t buf_len,
1017 			    int index, u32 rates)
1018 {
1019 	struct wl1271_cmd_template_set *cmd;
1020 	int ret = 0;
1021 
1022 	wl1271_debug(DEBUG_CMD, "cmd template_set %d (role %d)",
1023 		     template_id, role_id);
1024 
1025 	WARN_ON(buf_len > WL1271_CMD_TEMPL_MAX_SIZE);
1026 	buf_len = min_t(size_t, buf_len, WL1271_CMD_TEMPL_MAX_SIZE);
1027 
1028 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1029 	if (!cmd) {
1030 		ret = -ENOMEM;
1031 		goto out;
1032 	}
1033 
1034 	/* during initialization wlvif is NULL */
1035 	cmd->role_id = role_id;
1036 	cmd->len = cpu_to_le16(buf_len);
1037 	cmd->template_type = template_id;
1038 	cmd->enabled_rates = cpu_to_le32(rates);
1039 	cmd->short_retry_limit = wl->conf.tx.tmpl_short_retry_limit;
1040 	cmd->long_retry_limit = wl->conf.tx.tmpl_long_retry_limit;
1041 	cmd->index = index;
1042 
1043 	if (buf)
1044 		memcpy(cmd->template_data, buf, buf_len);
1045 
1046 	ret = wl1271_cmd_send(wl, CMD_SET_TEMPLATE, cmd, sizeof(*cmd), 0);
1047 	if (ret < 0) {
1048 		wl1271_warning("cmd set_template failed: %d", ret);
1049 		goto out_free;
1050 	}
1051 
1052 out_free:
1053 	kfree(cmd);
1054 
1055 out:
1056 	return ret;
1057 }
1058 
1059 int wl12xx_cmd_build_null_data(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1060 {
1061 	struct sk_buff *skb = NULL;
1062 	int size;
1063 	void *ptr;
1064 	int ret = -ENOMEM;
1065 
1066 
1067 	if (wlvif->bss_type == BSS_TYPE_IBSS) {
1068 		size = sizeof(struct wl12xx_null_data_template);
1069 		ptr = NULL;
1070 	} else {
1071 		skb = ieee80211_nullfunc_get(wl->hw,
1072 					     wl12xx_wlvif_to_vif(wlvif));
1073 		if (!skb)
1074 			goto out;
1075 		size = skb->len;
1076 		ptr = skb->data;
1077 	}
1078 
1079 	ret = wl1271_cmd_template_set(wl, wlvif->role_id,
1080 				      CMD_TEMPL_NULL_DATA, ptr, size, 0,
1081 				      wlvif->basic_rate);
1082 
1083 out:
1084 	dev_kfree_skb(skb);
1085 	if (ret)
1086 		wl1271_warning("cmd buld null data failed %d", ret);
1087 
1088 	return ret;
1089 
1090 }
1091 
1092 int wl12xx_cmd_build_klv_null_data(struct wl1271 *wl,
1093 				   struct wl12xx_vif *wlvif)
1094 {
1095 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
1096 	struct sk_buff *skb = NULL;
1097 	int ret = -ENOMEM;
1098 
1099 	skb = ieee80211_nullfunc_get(wl->hw, vif);
1100 	if (!skb)
1101 		goto out;
1102 
1103 	ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_KLV,
1104 				      skb->data, skb->len,
1105 				      wlvif->sta.klv_template_id,
1106 				      wlvif->basic_rate);
1107 
1108 out:
1109 	dev_kfree_skb(skb);
1110 	if (ret)
1111 		wl1271_warning("cmd build klv null data failed %d", ret);
1112 
1113 	return ret;
1114 
1115 }
1116 
1117 int wl1271_cmd_build_ps_poll(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1118 			     u16 aid)
1119 {
1120 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
1121 	struct sk_buff *skb;
1122 	int ret = 0;
1123 
1124 	skb = ieee80211_pspoll_get(wl->hw, vif);
1125 	if (!skb)
1126 		goto out;
1127 
1128 	ret = wl1271_cmd_template_set(wl, wlvif->role_id,
1129 				      CMD_TEMPL_PS_POLL, skb->data,
1130 				      skb->len, 0, wlvif->basic_rate_set);
1131 
1132 out:
1133 	dev_kfree_skb(skb);
1134 	return ret;
1135 }
1136 
1137 int wl12xx_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1138 			       u8 role_id, u8 band,
1139 			       const u8 *ssid, size_t ssid_len,
1140 			       const u8 *ie0, size_t ie0_len, const u8 *ie1,
1141 			       size_t ie1_len, bool sched_scan)
1142 {
1143 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
1144 	struct sk_buff *skb;
1145 	int ret;
1146 	u32 rate;
1147 	u16 template_id_2_4 = wl->scan_templ_id_2_4;
1148 	u16 template_id_5 = wl->scan_templ_id_5;
1149 
1150 	wl1271_debug(DEBUG_SCAN, "build probe request band %d", band);
1151 
1152 	skb = ieee80211_probereq_get(wl->hw, vif->addr, ssid, ssid_len,
1153 				     ie0_len + ie1_len);
1154 	if (!skb) {
1155 		ret = -ENOMEM;
1156 		goto out;
1157 	}
1158 	if (ie0_len)
1159 		skb_put_data(skb, ie0, ie0_len);
1160 	if (ie1_len)
1161 		skb_put_data(skb, ie1, ie1_len);
1162 
1163 	if (sched_scan &&
1164 	    (wl->quirks & WLCORE_QUIRK_DUAL_PROBE_TMPL)) {
1165 		template_id_2_4 = wl->sched_scan_templ_id_2_4;
1166 		template_id_5 = wl->sched_scan_templ_id_5;
1167 	}
1168 
1169 	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
1170 	if (band == NL80211_BAND_2GHZ)
1171 		ret = wl1271_cmd_template_set(wl, role_id,
1172 					      template_id_2_4,
1173 					      skb->data, skb->len, 0, rate);
1174 	else
1175 		ret = wl1271_cmd_template_set(wl, role_id,
1176 					      template_id_5,
1177 					      skb->data, skb->len, 0, rate);
1178 
1179 out:
1180 	dev_kfree_skb(skb);
1181 	return ret;
1182 }
1183 EXPORT_SYMBOL_GPL(wl12xx_cmd_build_probe_req);
1184 
1185 struct sk_buff *wl1271_cmd_build_ap_probe_req(struct wl1271 *wl,
1186 					      struct wl12xx_vif *wlvif,
1187 					      struct sk_buff *skb)
1188 {
1189 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
1190 	int ret;
1191 	u32 rate;
1192 
1193 	if (!skb)
1194 		skb = ieee80211_ap_probereq_get(wl->hw, vif);
1195 	if (!skb)
1196 		goto out;
1197 
1198 	wl1271_debug(DEBUG_SCAN, "set ap probe request template");
1199 
1200 	rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[wlvif->band]);
1201 	if (wlvif->band == NL80211_BAND_2GHZ)
1202 		ret = wl1271_cmd_template_set(wl, wlvif->role_id,
1203 					      CMD_TEMPL_CFG_PROBE_REQ_2_4,
1204 					      skb->data, skb->len, 0, rate);
1205 	else
1206 		ret = wl1271_cmd_template_set(wl, wlvif->role_id,
1207 					      CMD_TEMPL_CFG_PROBE_REQ_5,
1208 					      skb->data, skb->len, 0, rate);
1209 
1210 	if (ret < 0)
1211 		wl1271_error("Unable to set ap probe request template.");
1212 
1213 out:
1214 	return skb;
1215 }
1216 
1217 int wl1271_cmd_build_arp_rsp(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1218 {
1219 	int ret, extra = 0;
1220 	u16 fc;
1221 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
1222 	struct sk_buff *skb;
1223 	struct wl12xx_arp_rsp_template *tmpl;
1224 	struct ieee80211_hdr_3addr *hdr;
1225 	struct arphdr *arp_hdr;
1226 
1227 	skb = dev_alloc_skb(sizeof(*hdr) + sizeof(__le16) + sizeof(*tmpl) +
1228 			    WL1271_EXTRA_SPACE_MAX);
1229 	if (!skb) {
1230 		wl1271_error("failed to allocate buffer for arp rsp template");
1231 		return -ENOMEM;
1232 	}
1233 
1234 	skb_reserve(skb, sizeof(*hdr) + WL1271_EXTRA_SPACE_MAX);
1235 
1236 	tmpl = skb_put_zero(skb, sizeof(*tmpl));
1237 
1238 	/* llc layer */
1239 	memcpy(tmpl->llc_hdr, rfc1042_header, sizeof(rfc1042_header));
1240 	tmpl->llc_type = cpu_to_be16(ETH_P_ARP);
1241 
1242 	/* arp header */
1243 	arp_hdr = &tmpl->arp_hdr;
1244 	arp_hdr->ar_hrd = cpu_to_be16(ARPHRD_ETHER);
1245 	arp_hdr->ar_pro = cpu_to_be16(ETH_P_IP);
1246 	arp_hdr->ar_hln = ETH_ALEN;
1247 	arp_hdr->ar_pln = 4;
1248 	arp_hdr->ar_op = cpu_to_be16(ARPOP_REPLY);
1249 
1250 	/* arp payload */
1251 	memcpy(tmpl->sender_hw, vif->addr, ETH_ALEN);
1252 	tmpl->sender_ip = wlvif->ip_addr;
1253 
1254 	/* encryption space */
1255 	switch (wlvif->encryption_type) {
1256 	case KEY_TKIP:
1257 		if (wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE)
1258 			extra = WL1271_EXTRA_SPACE_TKIP;
1259 		break;
1260 	case KEY_AES:
1261 		extra = WL1271_EXTRA_SPACE_AES;
1262 		break;
1263 	case KEY_NONE:
1264 	case KEY_WEP:
1265 	case KEY_GEM:
1266 		extra = 0;
1267 		break;
1268 	default:
1269 		wl1271_warning("Unknown encryption type: %d",
1270 			       wlvif->encryption_type);
1271 		ret = -EINVAL;
1272 		goto out;
1273 	}
1274 
1275 	if (extra) {
1276 		u8 *space = skb_push(skb, extra);
1277 		memset(space, 0, extra);
1278 	}
1279 
1280 	/* QoS header - BE */
1281 	if (wlvif->sta.qos)
1282 		memset(skb_push(skb, sizeof(__le16)), 0, sizeof(__le16));
1283 
1284 	/* mac80211 header */
1285 	hdr = skb_push(skb, sizeof(*hdr));
1286 	memset(hdr, 0, sizeof(*hdr));
1287 	fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_TODS;
1288 	if (wlvif->sta.qos)
1289 		fc |= IEEE80211_STYPE_QOS_DATA;
1290 	else
1291 		fc |= IEEE80211_STYPE_DATA;
1292 	if (wlvif->encryption_type != KEY_NONE)
1293 		fc |= IEEE80211_FCTL_PROTECTED;
1294 
1295 	hdr->frame_control = cpu_to_le16(fc);
1296 	memcpy(hdr->addr1, vif->bss_conf.bssid, ETH_ALEN);
1297 	memcpy(hdr->addr2, vif->addr, ETH_ALEN);
1298 	eth_broadcast_addr(hdr->addr3);
1299 
1300 	ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_ARP_RSP,
1301 				      skb->data, skb->len, 0,
1302 				      wlvif->basic_rate);
1303 out:
1304 	dev_kfree_skb(skb);
1305 	return ret;
1306 }
1307 
1308 int wl1271_build_qos_null_data(struct wl1271 *wl, struct ieee80211_vif *vif)
1309 {
1310 	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
1311 	struct ieee80211_qos_hdr template;
1312 
1313 	memset(&template, 0, sizeof(template));
1314 
1315 	memcpy(template.addr1, vif->bss_conf.bssid, ETH_ALEN);
1316 	memcpy(template.addr2, vif->addr, ETH_ALEN);
1317 	memcpy(template.addr3, vif->bss_conf.bssid, ETH_ALEN);
1318 
1319 	template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
1320 					     IEEE80211_STYPE_QOS_NULLFUNC |
1321 					     IEEE80211_FCTL_TODS);
1322 
1323 	/* FIXME: not sure what priority to use here */
1324 	template.qos_ctrl = cpu_to_le16(0);
1325 
1326 	return wl1271_cmd_template_set(wl, wlvif->role_id,
1327 				       CMD_TEMPL_QOS_NULL_DATA, &template,
1328 				       sizeof(template), 0,
1329 				       wlvif->basic_rate);
1330 }
1331 
1332 int wl12xx_cmd_set_default_wep_key(struct wl1271 *wl, u8 id, u8 hlid)
1333 {
1334 	struct wl1271_cmd_set_keys *cmd;
1335 	int ret = 0;
1336 
1337 	wl1271_debug(DEBUG_CMD, "cmd set_default_wep_key %d", id);
1338 
1339 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1340 	if (!cmd) {
1341 		ret = -ENOMEM;
1342 		goto out;
1343 	}
1344 
1345 	cmd->hlid = hlid;
1346 	cmd->key_id = id;
1347 	cmd->lid_key_type = WEP_DEFAULT_LID_TYPE;
1348 	cmd->key_action = cpu_to_le16(KEY_SET_ID);
1349 	cmd->key_type = KEY_WEP;
1350 
1351 	ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
1352 	if (ret < 0) {
1353 		wl1271_warning("cmd set_default_wep_key failed: %d", ret);
1354 		goto out;
1355 	}
1356 
1357 out:
1358 	kfree(cmd);
1359 
1360 	return ret;
1361 }
1362 
1363 int wl1271_cmd_set_sta_key(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1364 		       u16 action, u8 id, u8 key_type,
1365 		       u8 key_size, const u8 *key, const u8 *addr,
1366 		       u32 tx_seq_32, u16 tx_seq_16)
1367 {
1368 	struct wl1271_cmd_set_keys *cmd;
1369 	int ret = 0;
1370 
1371 	/* hlid might have already been deleted */
1372 	if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID)
1373 		return 0;
1374 
1375 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1376 	if (!cmd) {
1377 		ret = -ENOMEM;
1378 		goto out;
1379 	}
1380 
1381 	cmd->hlid = wlvif->sta.hlid;
1382 
1383 	if (key_type == KEY_WEP)
1384 		cmd->lid_key_type = WEP_DEFAULT_LID_TYPE;
1385 	else if (is_broadcast_ether_addr(addr))
1386 		cmd->lid_key_type = BROADCAST_LID_TYPE;
1387 	else
1388 		cmd->lid_key_type = UNICAST_LID_TYPE;
1389 
1390 	cmd->key_action = cpu_to_le16(action);
1391 	cmd->key_size = key_size;
1392 	cmd->key_type = key_type;
1393 
1394 	cmd->ac_seq_num16[0] = cpu_to_le16(tx_seq_16);
1395 	cmd->ac_seq_num32[0] = cpu_to_le32(tx_seq_32);
1396 
1397 	cmd->key_id = id;
1398 
1399 	if (key_type == KEY_TKIP) {
1400 		/*
1401 		 * We get the key in the following form:
1402 		 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1403 		 * but the target is expecting:
1404 		 * TKIP - RX MIC - TX MIC
1405 		 */
1406 		memcpy(cmd->key, key, 16);
1407 		memcpy(cmd->key + 16, key + 24, 8);
1408 		memcpy(cmd->key + 24, key + 16, 8);
1409 
1410 	} else {
1411 		memcpy(cmd->key, key, key_size);
1412 	}
1413 
1414 	wl1271_dump(DEBUG_CRYPT, "TARGET KEY: ", cmd, sizeof(*cmd));
1415 
1416 	ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
1417 	if (ret < 0) {
1418 		wl1271_warning("could not set keys");
1419 	goto out;
1420 	}
1421 
1422 out:
1423 	kfree(cmd);
1424 
1425 	return ret;
1426 }
1427 
1428 /*
1429  * TODO: merge with sta/ibss into 1 set_key function.
1430  * note there are slight diffs
1431  */
1432 int wl1271_cmd_set_ap_key(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1433 			  u16 action, u8 id, u8 key_type,
1434 			  u8 key_size, const u8 *key, u8 hlid, u32 tx_seq_32,
1435 			  u16 tx_seq_16)
1436 {
1437 	struct wl1271_cmd_set_keys *cmd;
1438 	int ret = 0;
1439 	u8 lid_type;
1440 
1441 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1442 	if (!cmd)
1443 		return -ENOMEM;
1444 
1445 	if (hlid == wlvif->ap.bcast_hlid) {
1446 		if (key_type == KEY_WEP)
1447 			lid_type = WEP_DEFAULT_LID_TYPE;
1448 		else
1449 			lid_type = BROADCAST_LID_TYPE;
1450 	} else {
1451 		lid_type = UNICAST_LID_TYPE;
1452 	}
1453 
1454 	wl1271_debug(DEBUG_CRYPT, "ap key action: %d id: %d lid: %d type: %d"
1455 		     " hlid: %d", (int)action, (int)id, (int)lid_type,
1456 		     (int)key_type, (int)hlid);
1457 
1458 	cmd->lid_key_type = lid_type;
1459 	cmd->hlid = hlid;
1460 	cmd->key_action = cpu_to_le16(action);
1461 	cmd->key_size = key_size;
1462 	cmd->key_type = key_type;
1463 	cmd->key_id = id;
1464 	cmd->ac_seq_num16[0] = cpu_to_le16(tx_seq_16);
1465 	cmd->ac_seq_num32[0] = cpu_to_le32(tx_seq_32);
1466 
1467 	if (key_type == KEY_TKIP) {
1468 		/*
1469 		 * We get the key in the following form:
1470 		 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1471 		 * but the target is expecting:
1472 		 * TKIP - RX MIC - TX MIC
1473 		 */
1474 		memcpy(cmd->key, key, 16);
1475 		memcpy(cmd->key + 16, key + 24, 8);
1476 		memcpy(cmd->key + 24, key + 16, 8);
1477 	} else {
1478 		memcpy(cmd->key, key, key_size);
1479 	}
1480 
1481 	wl1271_dump(DEBUG_CRYPT, "TARGET AP KEY: ", cmd, sizeof(*cmd));
1482 
1483 	ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
1484 	if (ret < 0) {
1485 		wl1271_warning("could not set ap keys");
1486 		goto out;
1487 	}
1488 
1489 out:
1490 	kfree(cmd);
1491 	return ret;
1492 }
1493 
1494 int wl12xx_cmd_set_peer_state(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1495 			      u8 hlid)
1496 {
1497 	struct wl12xx_cmd_set_peer_state *cmd;
1498 	int ret = 0;
1499 
1500 	wl1271_debug(DEBUG_CMD, "cmd set peer state (hlid=%d)", hlid);
1501 
1502 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1503 	if (!cmd) {
1504 		ret = -ENOMEM;
1505 		goto out;
1506 	}
1507 
1508 	cmd->hlid = hlid;
1509 	cmd->state = WL1271_CMD_STA_STATE_CONNECTED;
1510 
1511 	/* wmm param is valid only for station role */
1512 	if (wlvif->bss_type == BSS_TYPE_STA_BSS)
1513 		cmd->wmm = wlvif->wmm_enabled;
1514 
1515 	ret = wl1271_cmd_send(wl, CMD_SET_PEER_STATE, cmd, sizeof(*cmd), 0);
1516 	if (ret < 0) {
1517 		wl1271_error("failed to send set peer state command");
1518 		goto out_free;
1519 	}
1520 
1521 out_free:
1522 	kfree(cmd);
1523 
1524 out:
1525 	return ret;
1526 }
1527 
1528 int wl12xx_cmd_add_peer(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1529 			struct ieee80211_sta *sta, u8 hlid)
1530 {
1531 	struct wl12xx_cmd_add_peer *cmd;
1532 	int i, ret;
1533 	u32 sta_rates;
1534 
1535 	wl1271_debug(DEBUG_CMD, "cmd add peer %d", (int)hlid);
1536 
1537 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1538 	if (!cmd) {
1539 		ret = -ENOMEM;
1540 		goto out;
1541 	}
1542 
1543 	memcpy(cmd->addr, sta->addr, ETH_ALEN);
1544 	cmd->bss_index = WL1271_AP_BSS_INDEX;
1545 	cmd->aid = sta->aid;
1546 	cmd->hlid = hlid;
1547 	cmd->sp_len = sta->max_sp;
1548 	cmd->wmm = sta->wme ? 1 : 0;
1549 	cmd->session_id = wl->session_ids[hlid];
1550 	cmd->role_id = wlvif->role_id;
1551 
1552 	for (i = 0; i < NUM_ACCESS_CATEGORIES_COPY; i++)
1553 		if (sta->wme && (sta->uapsd_queues & BIT(i)))
1554 			cmd->psd_type[NUM_ACCESS_CATEGORIES_COPY-1-i] =
1555 					WL1271_PSD_UPSD_TRIGGER;
1556 		else
1557 			cmd->psd_type[NUM_ACCESS_CATEGORIES_COPY-1-i] =
1558 					WL1271_PSD_LEGACY;
1559 
1560 
1561 	sta_rates = sta->supp_rates[wlvif->band];
1562 	if (sta->ht_cap.ht_supported)
1563 		sta_rates |=
1564 			(sta->ht_cap.mcs.rx_mask[0] << HW_HT_RATES_OFFSET) |
1565 			(sta->ht_cap.mcs.rx_mask[1] << HW_MIMO_RATES_OFFSET);
1566 
1567 	cmd->supported_rates =
1568 		cpu_to_le32(wl1271_tx_enabled_rates_get(wl, sta_rates,
1569 							wlvif->band));
1570 
1571 	if (!cmd->supported_rates) {
1572 		wl1271_debug(DEBUG_CMD,
1573 			     "peer has no supported rates yet, configuring basic rates: 0x%x",
1574 			     wlvif->basic_rate_set);
1575 		cmd->supported_rates = cpu_to_le32(wlvif->basic_rate_set);
1576 	}
1577 
1578 	wl1271_debug(DEBUG_CMD, "new peer rates=0x%x queues=0x%x",
1579 		     cmd->supported_rates, sta->uapsd_queues);
1580 
1581 	ret = wl1271_cmd_send(wl, CMD_ADD_PEER, cmd, sizeof(*cmd), 0);
1582 	if (ret < 0) {
1583 		wl1271_error("failed to initiate cmd add peer");
1584 		goto out_free;
1585 	}
1586 
1587 out_free:
1588 	kfree(cmd);
1589 
1590 out:
1591 	return ret;
1592 }
1593 
1594 int wl12xx_cmd_remove_peer(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1595 			   u8 hlid)
1596 {
1597 	struct wl12xx_cmd_remove_peer *cmd;
1598 	int ret;
1599 	bool timeout = false;
1600 
1601 	wl1271_debug(DEBUG_CMD, "cmd remove peer %d", (int)hlid);
1602 
1603 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1604 	if (!cmd) {
1605 		ret = -ENOMEM;
1606 		goto out;
1607 	}
1608 
1609 	cmd->hlid = hlid;
1610 	/* We never send a deauth, mac80211 is in charge of this */
1611 	cmd->reason_opcode = 0;
1612 	cmd->send_deauth_flag = 0;
1613 	cmd->role_id = wlvif->role_id;
1614 
1615 	ret = wl1271_cmd_send(wl, CMD_REMOVE_PEER, cmd, sizeof(*cmd), 0);
1616 	if (ret < 0) {
1617 		wl1271_error("failed to initiate cmd remove peer");
1618 		goto out_free;
1619 	}
1620 
1621 	ret = wl->ops->wait_for_event(wl,
1622 				      WLCORE_EVENT_PEER_REMOVE_COMPLETE,
1623 				      &timeout);
1624 
1625 	/*
1626 	 * We are ok with a timeout here. The event is sometimes not sent
1627 	 * due to a firmware bug. In case of another error (like SDIO timeout)
1628 	 * queue a recovery.
1629 	 */
1630 	if (ret)
1631 		wl12xx_queue_recovery_work(wl);
1632 
1633 out_free:
1634 	kfree(cmd);
1635 
1636 out:
1637 	return ret;
1638 }
1639 
1640 static int wlcore_get_reg_conf_ch_idx(enum nl80211_band band, u16 ch)
1641 {
1642 	/*
1643 	 * map the given band/channel to the respective predefined
1644 	 * bit expected by the fw
1645 	 */
1646 	switch (band) {
1647 	case NL80211_BAND_2GHZ:
1648 		/* channels 1..14 are mapped to 0..13 */
1649 		if (ch >= 1 && ch <= 14)
1650 			return ch - 1;
1651 		break;
1652 	case NL80211_BAND_5GHZ:
1653 		switch (ch) {
1654 		case 8 ... 16:
1655 			/* channels 8,12,16 are mapped to 18,19,20 */
1656 			return 18 + (ch-8)/4;
1657 		case 34 ... 48:
1658 			/* channels 34,36..48 are mapped to 21..28 */
1659 			return 21 + (ch-34)/2;
1660 		case 52 ... 64:
1661 			/* channels 52,56..64 are mapped to 29..32 */
1662 			return 29 + (ch-52)/4;
1663 		case 100 ... 140:
1664 			/* channels 100,104..140 are mapped to 33..43 */
1665 			return 33 + (ch-100)/4;
1666 		case 149 ... 165:
1667 			/* channels 149,153..165 are mapped to 44..48 */
1668 			return 44 + (ch-149)/4;
1669 		default:
1670 			break;
1671 		}
1672 		break;
1673 	default:
1674 		break;
1675 	}
1676 
1677 	wl1271_error("%s: unknown band/channel: %d/%d", __func__, band, ch);
1678 	return -1;
1679 }
1680 
1681 void wlcore_set_pending_regdomain_ch(struct wl1271 *wl, u16 channel,
1682 				     enum nl80211_band band)
1683 {
1684 	int ch_bit_idx = 0;
1685 
1686 	if (!(wl->quirks & WLCORE_QUIRK_REGDOMAIN_CONF))
1687 		return;
1688 
1689 	ch_bit_idx = wlcore_get_reg_conf_ch_idx(band, channel);
1690 
1691 	if (ch_bit_idx >= 0 && ch_bit_idx <= WL1271_MAX_CHANNELS)
1692 		set_bit(ch_bit_idx, (long *)wl->reg_ch_conf_pending);
1693 }
1694 
1695 int wlcore_cmd_regdomain_config_locked(struct wl1271 *wl)
1696 {
1697 	struct wl12xx_cmd_regdomain_dfs_config *cmd = NULL;
1698 	int ret = 0, i, b, ch_bit_idx;
1699 	u32 tmp_ch_bitmap[2];
1700 	struct wiphy *wiphy = wl->hw->wiphy;
1701 	struct ieee80211_supported_band *band;
1702 	bool timeout = false;
1703 
1704 	if (!(wl->quirks & WLCORE_QUIRK_REGDOMAIN_CONF))
1705 		return 0;
1706 
1707 	wl1271_debug(DEBUG_CMD, "cmd reg domain config");
1708 
1709 	memset(tmp_ch_bitmap, 0, sizeof(tmp_ch_bitmap));
1710 
1711 	for (b = NL80211_BAND_2GHZ; b <= NL80211_BAND_5GHZ; b++) {
1712 		band = wiphy->bands[b];
1713 		for (i = 0; i < band->n_channels; i++) {
1714 			struct ieee80211_channel *channel = &band->channels[i];
1715 			u16 ch = channel->hw_value;
1716 			u32 flags = channel->flags;
1717 
1718 			if (flags & (IEEE80211_CHAN_DISABLED |
1719 				     IEEE80211_CHAN_NO_IR))
1720 				continue;
1721 
1722 			if ((flags & IEEE80211_CHAN_RADAR) &&
1723 			    channel->dfs_state != NL80211_DFS_AVAILABLE)
1724 				continue;
1725 
1726 			ch_bit_idx = wlcore_get_reg_conf_ch_idx(b, ch);
1727 			if (ch_bit_idx < 0)
1728 				continue;
1729 
1730 			set_bit(ch_bit_idx, (long *)tmp_ch_bitmap);
1731 		}
1732 	}
1733 
1734 	tmp_ch_bitmap[0] |= wl->reg_ch_conf_pending[0];
1735 	tmp_ch_bitmap[1] |= wl->reg_ch_conf_pending[1];
1736 
1737 	if (!memcmp(tmp_ch_bitmap, wl->reg_ch_conf_last, sizeof(tmp_ch_bitmap)))
1738 		goto out;
1739 
1740 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1741 	if (!cmd) {
1742 		ret = -ENOMEM;
1743 		goto out;
1744 	}
1745 
1746 	cmd->ch_bit_map1 = cpu_to_le32(tmp_ch_bitmap[0]);
1747 	cmd->ch_bit_map2 = cpu_to_le32(tmp_ch_bitmap[1]);
1748 	cmd->dfs_region = wl->dfs_region;
1749 
1750 	wl1271_debug(DEBUG_CMD,
1751 		     "cmd reg domain bitmap1: 0x%08x, bitmap2: 0x%08x",
1752 		     cmd->ch_bit_map1, cmd->ch_bit_map2);
1753 
1754 	ret = wl1271_cmd_send(wl, CMD_DFS_CHANNEL_CONFIG, cmd, sizeof(*cmd), 0);
1755 	if (ret < 0) {
1756 		wl1271_error("failed to send reg domain dfs config");
1757 		goto out;
1758 	}
1759 
1760 	ret = wl->ops->wait_for_event(wl,
1761 				      WLCORE_EVENT_DFS_CONFIG_COMPLETE,
1762 				      &timeout);
1763 	if (ret < 0 || timeout) {
1764 		wl1271_error("reg domain conf %serror",
1765 			     timeout ? "completion " : "");
1766 		ret = timeout ? -ETIMEDOUT : ret;
1767 		goto out;
1768 	}
1769 
1770 	memcpy(wl->reg_ch_conf_last, tmp_ch_bitmap, sizeof(tmp_ch_bitmap));
1771 	memset(wl->reg_ch_conf_pending, 0, sizeof(wl->reg_ch_conf_pending));
1772 
1773 out:
1774 	kfree(cmd);
1775 	return ret;
1776 }
1777 
1778 int wl12xx_cmd_config_fwlog(struct wl1271 *wl)
1779 {
1780 	struct wl12xx_cmd_config_fwlog *cmd;
1781 	int ret = 0;
1782 
1783 	wl1271_debug(DEBUG_CMD, "cmd config firmware logger");
1784 
1785 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1786 	if (!cmd) {
1787 		ret = -ENOMEM;
1788 		goto out;
1789 	}
1790 
1791 	cmd->logger_mode = wl->conf.fwlog.mode;
1792 	cmd->log_severity = wl->conf.fwlog.severity;
1793 	cmd->timestamp = wl->conf.fwlog.timestamp;
1794 	cmd->output = wl->conf.fwlog.output;
1795 	cmd->threshold = wl->conf.fwlog.threshold;
1796 
1797 	ret = wl1271_cmd_send(wl, CMD_CONFIG_FWLOGGER, cmd, sizeof(*cmd), 0);
1798 	if (ret < 0) {
1799 		wl1271_error("failed to send config firmware logger command");
1800 		goto out_free;
1801 	}
1802 
1803 out_free:
1804 	kfree(cmd);
1805 
1806 out:
1807 	return ret;
1808 }
1809 
1810 int wl12xx_cmd_start_fwlog(struct wl1271 *wl)
1811 {
1812 	struct wl12xx_cmd_start_fwlog *cmd;
1813 	int ret = 0;
1814 
1815 	wl1271_debug(DEBUG_CMD, "cmd start firmware logger");
1816 
1817 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1818 	if (!cmd) {
1819 		ret = -ENOMEM;
1820 		goto out;
1821 	}
1822 
1823 	ret = wl1271_cmd_send(wl, CMD_START_FWLOGGER, cmd, sizeof(*cmd), 0);
1824 	if (ret < 0) {
1825 		wl1271_error("failed to send start firmware logger command");
1826 		goto out_free;
1827 	}
1828 
1829 out_free:
1830 	kfree(cmd);
1831 
1832 out:
1833 	return ret;
1834 }
1835 
1836 int wl12xx_cmd_stop_fwlog(struct wl1271 *wl)
1837 {
1838 	struct wl12xx_cmd_stop_fwlog *cmd;
1839 	int ret = 0;
1840 
1841 	wl1271_debug(DEBUG_CMD, "cmd stop firmware logger");
1842 
1843 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1844 	if (!cmd) {
1845 		ret = -ENOMEM;
1846 		goto out;
1847 	}
1848 
1849 	ret = wl1271_cmd_send(wl, CMD_STOP_FWLOGGER, cmd, sizeof(*cmd), 0);
1850 	if (ret < 0) {
1851 		wl1271_error("failed to send stop firmware logger command");
1852 		goto out_free;
1853 	}
1854 
1855 out_free:
1856 	kfree(cmd);
1857 
1858 out:
1859 	return ret;
1860 }
1861 
1862 static int wl12xx_cmd_roc(struct wl1271 *wl, struct wl12xx_vif *wlvif,
1863 			  u8 role_id, enum nl80211_band band, u8 channel)
1864 {
1865 	struct wl12xx_cmd_roc *cmd;
1866 	int ret = 0;
1867 
1868 	wl1271_debug(DEBUG_CMD, "cmd roc %d (%d)", channel, role_id);
1869 
1870 	if (WARN_ON(role_id == WL12XX_INVALID_ROLE_ID))
1871 		return -EINVAL;
1872 
1873 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1874 	if (!cmd) {
1875 		ret = -ENOMEM;
1876 		goto out;
1877 	}
1878 
1879 	cmd->role_id = role_id;
1880 	cmd->channel = channel;
1881 	switch (band) {
1882 	case NL80211_BAND_2GHZ:
1883 		cmd->band = WLCORE_BAND_2_4GHZ;
1884 		break;
1885 	case NL80211_BAND_5GHZ:
1886 		cmd->band = WLCORE_BAND_5GHZ;
1887 		break;
1888 	default:
1889 		wl1271_error("roc - unknown band: %d", (int)wlvif->band);
1890 		ret = -EINVAL;
1891 		goto out_free;
1892 	}
1893 
1894 
1895 	ret = wl1271_cmd_send(wl, CMD_REMAIN_ON_CHANNEL, cmd, sizeof(*cmd), 0);
1896 	if (ret < 0) {
1897 		wl1271_error("failed to send ROC command");
1898 		goto out_free;
1899 	}
1900 
1901 out_free:
1902 	kfree(cmd);
1903 
1904 out:
1905 	return ret;
1906 }
1907 
1908 static int wl12xx_cmd_croc(struct wl1271 *wl, u8 role_id)
1909 {
1910 	struct wl12xx_cmd_croc *cmd;
1911 	int ret = 0;
1912 
1913 	wl1271_debug(DEBUG_CMD, "cmd croc (%d)", role_id);
1914 
1915 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1916 	if (!cmd) {
1917 		ret = -ENOMEM;
1918 		goto out;
1919 	}
1920 	cmd->role_id = role_id;
1921 
1922 	ret = wl1271_cmd_send(wl, CMD_CANCEL_REMAIN_ON_CHANNEL, cmd,
1923 			      sizeof(*cmd), 0);
1924 	if (ret < 0) {
1925 		wl1271_error("failed to send ROC command");
1926 		goto out_free;
1927 	}
1928 
1929 out_free:
1930 	kfree(cmd);
1931 
1932 out:
1933 	return ret;
1934 }
1935 
1936 int wl12xx_roc(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 role_id,
1937 	       enum nl80211_band band, u8 channel)
1938 {
1939 	int ret = 0;
1940 
1941 	if (WARN_ON(test_bit(role_id, wl->roc_map)))
1942 		return 0;
1943 
1944 	ret = wl12xx_cmd_roc(wl, wlvif, role_id, band, channel);
1945 	if (ret < 0)
1946 		goto out;
1947 
1948 	__set_bit(role_id, wl->roc_map);
1949 out:
1950 	return ret;
1951 }
1952 
1953 int wl12xx_croc(struct wl1271 *wl, u8 role_id)
1954 {
1955 	int ret = 0;
1956 
1957 	if (WARN_ON(!test_bit(role_id, wl->roc_map)))
1958 		return 0;
1959 
1960 	ret = wl12xx_cmd_croc(wl, role_id);
1961 	if (ret < 0)
1962 		goto out;
1963 
1964 	__clear_bit(role_id, wl->roc_map);
1965 
1966 	/*
1967 	 * Rearm the tx watchdog when removing the last ROC. This prevents
1968 	 * recoveries due to just finished ROCs - when Tx hasn't yet had
1969 	 * a chance to get out.
1970 	 */
1971 	if (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) >= WL12XX_MAX_ROLES)
1972 		wl12xx_rearm_tx_watchdog_locked(wl);
1973 out:
1974 	return ret;
1975 }
1976 
1977 int wl12xx_cmd_stop_channel_switch(struct wl1271 *wl, struct wl12xx_vif *wlvif)
1978 {
1979 	struct wl12xx_cmd_stop_channel_switch *cmd;
1980 	int ret;
1981 
1982 	wl1271_debug(DEBUG_ACX, "cmd stop channel switch");
1983 
1984 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1985 	if (!cmd) {
1986 		ret = -ENOMEM;
1987 		goto out;
1988 	}
1989 
1990 	cmd->role_id = wlvif->role_id;
1991 
1992 	ret = wl1271_cmd_send(wl, CMD_STOP_CHANNEL_SWICTH, cmd, sizeof(*cmd), 0);
1993 	if (ret < 0) {
1994 		wl1271_error("failed to stop channel switch command");
1995 		goto out_free;
1996 	}
1997 
1998 out_free:
1999 	kfree(cmd);
2000 
2001 out:
2002 	return ret;
2003 }
2004 
2005 /* start dev role and roc on its channel */
2006 int wl12xx_start_dev(struct wl1271 *wl, struct wl12xx_vif *wlvif,
2007 		     enum nl80211_band band, int channel)
2008 {
2009 	int ret;
2010 
2011 	if (WARN_ON(!(wlvif->bss_type == BSS_TYPE_STA_BSS ||
2012 		      wlvif->bss_type == BSS_TYPE_IBSS)))
2013 		return -EINVAL;
2014 
2015 	/* the dev role is already started for p2p mgmt interfaces */
2016 	if (!wlcore_is_p2p_mgmt(wlvif)) {
2017 		ret = wl12xx_cmd_role_enable(wl,
2018 					     wl12xx_wlvif_to_vif(wlvif)->addr,
2019 					     WL1271_ROLE_DEVICE,
2020 					     &wlvif->dev_role_id);
2021 		if (ret < 0)
2022 			goto out;
2023 	}
2024 
2025 	ret = wl12xx_cmd_role_start_dev(wl, wlvif, band, channel);
2026 	if (ret < 0)
2027 		goto out_disable;
2028 
2029 	ret = wl12xx_roc(wl, wlvif, wlvif->dev_role_id, band, channel);
2030 	if (ret < 0)
2031 		goto out_stop;
2032 
2033 	return 0;
2034 
2035 out_stop:
2036 	wl12xx_cmd_role_stop_dev(wl, wlvif);
2037 out_disable:
2038 	if (!wlcore_is_p2p_mgmt(wlvif))
2039 		wl12xx_cmd_role_disable(wl, &wlvif->dev_role_id);
2040 out:
2041 	return ret;
2042 }
2043 
2044 /* croc dev hlid, and stop the role */
2045 int wl12xx_stop_dev(struct wl1271 *wl, struct wl12xx_vif *wlvif)
2046 {
2047 	int ret;
2048 
2049 	if (WARN_ON(!(wlvif->bss_type == BSS_TYPE_STA_BSS ||
2050 		      wlvif->bss_type == BSS_TYPE_IBSS)))
2051 		return -EINVAL;
2052 
2053 	/* flush all pending packets */
2054 	ret = wlcore_tx_work_locked(wl);
2055 	if (ret < 0)
2056 		goto out;
2057 
2058 	if (test_bit(wlvif->dev_role_id, wl->roc_map)) {
2059 		ret = wl12xx_croc(wl, wlvif->dev_role_id);
2060 		if (ret < 0)
2061 			goto out;
2062 	}
2063 
2064 	ret = wl12xx_cmd_role_stop_dev(wl, wlvif);
2065 	if (ret < 0)
2066 		goto out;
2067 
2068 	if (!wlcore_is_p2p_mgmt(wlvif)) {
2069 		ret = wl12xx_cmd_role_disable(wl, &wlvif->dev_role_id);
2070 		if (ret < 0)
2071 			goto out;
2072 	}
2073 
2074 out:
2075 	return ret;
2076 }
2077 
2078 int wlcore_cmd_generic_cfg(struct wl1271 *wl, struct wl12xx_vif *wlvif,
2079 			   u8 feature, u8 enable, u8 value)
2080 {
2081 	struct wlcore_cmd_generic_cfg *cmd;
2082 	int ret;
2083 
2084 	wl1271_debug(DEBUG_CMD,
2085 		     "cmd generic cfg (role %d feature %d enable %d value %d)",
2086 		     wlvif->role_id, feature, enable, value);
2087 
2088 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2089 	if (!cmd)
2090 		return -ENOMEM;
2091 
2092 	cmd->role_id = wlvif->role_id;
2093 	cmd->feature = feature;
2094 	cmd->enable = enable;
2095 	cmd->value = value;
2096 
2097 	ret = wl1271_cmd_send(wl, CMD_GENERIC_CFG, cmd, sizeof(*cmd), 0);
2098 	if (ret < 0) {
2099 		wl1271_error("failed to send generic cfg command");
2100 		goto out_free;
2101 	}
2102 out_free:
2103 	kfree(cmd);
2104 	return ret;
2105 }
2106 EXPORT_SYMBOL_GPL(wlcore_cmd_generic_cfg);
2107