1 /*
2  * Copyright (c) 2004-2011 Atheros Communications Inc.
3  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19 
20 #include "core.h"
21 #include "hif-ops.h"
22 #include "cfg80211.h"
23 #include "target.h"
24 #include "debug.h"
25 
26 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl_vif *vif, u8 *node_addr)
27 {
28 	struct ath6kl *ar = vif->ar;
29 	struct ath6kl_sta *conn = NULL;
30 	u8 i, max_conn;
31 
32 	if (is_zero_ether_addr(node_addr))
33 		return NULL;
34 
35 	max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
36 
37 	for (i = 0; i < max_conn; i++) {
38 		if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
39 			conn = &ar->sta_list[i];
40 			break;
41 		}
42 	}
43 
44 	return conn;
45 }
46 
47 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
48 {
49 	struct ath6kl_sta *conn = NULL;
50 	u8 ctr;
51 
52 	for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
53 		if (ar->sta_list[ctr].aid == aid) {
54 			conn = &ar->sta_list[ctr];
55 			break;
56 		}
57 	}
58 	return conn;
59 }
60 
61 static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
62 			       u8 *wpaie, size_t ielen, u8 keymgmt,
63 			       u8 ucipher, u8 auth, u8 apsd_info)
64 {
65 	struct ath6kl *ar = vif->ar;
66 	struct ath6kl_sta *sta;
67 	u8 free_slot;
68 
69 	free_slot = aid - 1;
70 
71 	sta = &ar->sta_list[free_slot];
72 	memcpy(sta->mac, mac, ETH_ALEN);
73 	if (ielen <= ATH6KL_MAX_IE)
74 		memcpy(sta->wpa_ie, wpaie, ielen);
75 	sta->aid = aid;
76 	sta->keymgmt = keymgmt;
77 	sta->ucipher = ucipher;
78 	sta->auth = auth;
79 	sta->apsd_info = apsd_info;
80 
81 	ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
82 	ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
83 	aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
84 }
85 
86 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
87 {
88 	struct ath6kl_sta *sta = &ar->sta_list[i];
89 	struct ath6kl_mgmt_buff *entry, *tmp;
90 
91 	/* empty the queued pkts in the PS queue if any */
92 	spin_lock_bh(&sta->psq_lock);
93 	skb_queue_purge(&sta->psq);
94 	skb_queue_purge(&sta->apsdq);
95 
96 	if (sta->mgmt_psq_len != 0) {
97 		list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
98 			kfree(entry);
99 		}
100 		INIT_LIST_HEAD(&sta->mgmt_psq);
101 		sta->mgmt_psq_len = 0;
102 	}
103 
104 	spin_unlock_bh(&sta->psq_lock);
105 
106 	memset(&ar->ap_stats.sta[sta->aid - 1], 0,
107 	       sizeof(struct wmi_per_sta_stat));
108 	eth_zero_addr(sta->mac);
109 	memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
110 	sta->aid = 0;
111 	sta->sta_flags = 0;
112 
113 	ar->sta_list_index = ar->sta_list_index & ~(1 << i);
114 	aggr_reset_state(sta->aggr_conn);
115 }
116 
117 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
118 {
119 	u8 i, removed = 0;
120 
121 	if (is_zero_ether_addr(mac))
122 		return removed;
123 
124 	if (is_broadcast_ether_addr(mac)) {
125 		ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
126 
127 		for (i = 0; i < AP_MAX_NUM_STA; i++) {
128 			if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
129 				ath6kl_sta_cleanup(ar, i);
130 				removed = 1;
131 			}
132 		}
133 	} else {
134 		for (i = 0; i < AP_MAX_NUM_STA; i++) {
135 			if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
136 				ath6kl_dbg(ATH6KL_DBG_TRC,
137 					   "deleting station %pM aid=%d reason=%d\n",
138 					   mac, ar->sta_list[i].aid, reason);
139 				ath6kl_sta_cleanup(ar, i);
140 				removed = 1;
141 				break;
142 			}
143 		}
144 	}
145 
146 	return removed;
147 }
148 
149 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
150 {
151 	struct ath6kl *ar = devt;
152 	return ar->ac2ep_map[ac];
153 }
154 
155 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
156 {
157 	struct ath6kl_cookie *cookie;
158 
159 	cookie = ar->cookie_list;
160 	if (cookie != NULL) {
161 		ar->cookie_list = cookie->arc_list_next;
162 		ar->cookie_count--;
163 	}
164 
165 	return cookie;
166 }
167 
168 void ath6kl_cookie_init(struct ath6kl *ar)
169 {
170 	u32 i;
171 
172 	ar->cookie_list = NULL;
173 	ar->cookie_count = 0;
174 
175 	memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
176 
177 	for (i = 0; i < MAX_COOKIE_NUM; i++)
178 		ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
179 }
180 
181 void ath6kl_cookie_cleanup(struct ath6kl *ar)
182 {
183 	ar->cookie_list = NULL;
184 	ar->cookie_count = 0;
185 }
186 
187 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
188 {
189 	/* Insert first */
190 
191 	if (!ar || !cookie)
192 		return;
193 
194 	cookie->arc_list_next = ar->cookie_list;
195 	ar->cookie_list = cookie;
196 	ar->cookie_count++;
197 }
198 
199 /*
200  * Read from the hardware through its diagnostic window. No cooperation
201  * from the firmware is required for this.
202  */
203 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
204 {
205 	int ret;
206 
207 	ret = ath6kl_hif_diag_read32(ar, address, value);
208 	if (ret) {
209 		ath6kl_warn("failed to read32 through diagnose window: %d\n",
210 			    ret);
211 		return ret;
212 	}
213 
214 	return 0;
215 }
216 
217 /*
218  * Write to the ATH6KL through its diagnostic window. No cooperation from
219  * the Target is required for this.
220  */
221 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
222 {
223 	int ret;
224 
225 	ret = ath6kl_hif_diag_write32(ar, address, value);
226 
227 	if (ret) {
228 		ath6kl_err("failed to write 0x%x during diagnose window to 0x%x\n",
229 			   address, value);
230 		return ret;
231 	}
232 
233 	return 0;
234 }
235 
236 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
237 {
238 	u32 count, *buf = data;
239 	int ret;
240 
241 	if (WARN_ON(length % 4))
242 		return -EINVAL;
243 
244 	for (count = 0; count < length / 4; count++, address += 4) {
245 		ret = ath6kl_diag_read32(ar, address, &buf[count]);
246 		if (ret)
247 			return ret;
248 	}
249 
250 	return 0;
251 }
252 
253 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
254 {
255 	u32 count;
256 	__le32 *buf = data;
257 	int ret;
258 
259 	if (WARN_ON(length % 4))
260 		return -EINVAL;
261 
262 	for (count = 0; count < length / 4; count++, address += 4) {
263 		ret = ath6kl_diag_write32(ar, address, buf[count]);
264 		if (ret)
265 			return ret;
266 	}
267 
268 	return 0;
269 }
270 
271 int ath6kl_read_fwlogs(struct ath6kl *ar)
272 {
273 	struct ath6kl_dbglog_hdr debug_hdr;
274 	struct ath6kl_dbglog_buf debug_buf;
275 	u32 address, length, firstbuf, debug_hdr_addr;
276 	int ret, loop;
277 	u8 *buf;
278 
279 	buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
280 	if (!buf)
281 		return -ENOMEM;
282 
283 	address = TARG_VTOP(ar->target_type,
284 			    ath6kl_get_hi_item_addr(ar,
285 						    HI_ITEM(hi_dbglog_hdr)));
286 
287 	ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
288 	if (ret)
289 		goto out;
290 
291 	/* Get the contents of the ring buffer */
292 	if (debug_hdr_addr == 0) {
293 		ath6kl_warn("Invalid address for debug_hdr_addr\n");
294 		ret = -EINVAL;
295 		goto out;
296 	}
297 
298 	address = TARG_VTOP(ar->target_type, debug_hdr_addr);
299 	ret = ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
300 	if (ret)
301 		goto out;
302 
303 	address = TARG_VTOP(ar->target_type,
304 			    le32_to_cpu(debug_hdr.dbuf_addr));
305 	firstbuf = address;
306 	ret = ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
307 	if (ret)
308 		goto out;
309 
310 	loop = 100;
311 
312 	do {
313 		address = TARG_VTOP(ar->target_type,
314 				    le32_to_cpu(debug_buf.buffer_addr));
315 		length = le32_to_cpu(debug_buf.length);
316 
317 		if (length != 0 && (le32_to_cpu(debug_buf.length) <=
318 				    le32_to_cpu(debug_buf.bufsize))) {
319 			length = ALIGN(length, 4);
320 
321 			ret = ath6kl_diag_read(ar, address,
322 					       buf, length);
323 			if (ret)
324 				goto out;
325 
326 			ath6kl_debug_fwlog_event(ar, buf, length);
327 		}
328 
329 		address = TARG_VTOP(ar->target_type,
330 				    le32_to_cpu(debug_buf.next));
331 		ret = ath6kl_diag_read(ar, address, &debug_buf,
332 				       sizeof(debug_buf));
333 		if (ret)
334 			goto out;
335 
336 		loop--;
337 
338 		if (WARN_ON(loop == 0)) {
339 			ret = -ETIMEDOUT;
340 			goto out;
341 		}
342 	} while (address != firstbuf);
343 
344 out:
345 	kfree(buf);
346 
347 	return ret;
348 }
349 
350 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
351 {
352 	u8 index;
353 	u8 keyusage;
354 
355 	for (index = 0; index <= WMI_MAX_KEY_INDEX; index++) {
356 		if (vif->wep_key_list[index].key_len) {
357 			keyusage = GROUP_USAGE;
358 			if (index == vif->def_txkey_index)
359 				keyusage |= TX_USAGE;
360 
361 			ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
362 					      index,
363 					      WEP_CRYPT,
364 					      keyusage,
365 					      vif->wep_key_list[index].key_len,
366 					      NULL, 0,
367 					      vif->wep_key_list[index].key,
368 					      KEY_OP_INIT_VAL, NULL,
369 					      NO_SYNC_WMIFLAG);
370 		}
371 	}
372 }
373 
374 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
375 {
376 	struct ath6kl *ar = vif->ar;
377 	struct ath6kl_req_key *ik;
378 	int res;
379 	u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
380 
381 	ik = &ar->ap_mode_bkey;
382 
383 	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
384 
385 	switch (vif->auth_mode) {
386 	case NONE_AUTH:
387 		if (vif->prwise_crypto == WEP_CRYPT)
388 			ath6kl_install_static_wep_keys(vif);
389 		if (!ik->valid || ik->key_type != WAPI_CRYPT)
390 			break;
391 		/* for WAPI, we need to set the delayed group key, continue: */
392 		/* fall through */
393 	case WPA_PSK_AUTH:
394 	case WPA2_PSK_AUTH:
395 	case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
396 		if (!ik->valid)
397 			break;
398 
399 		ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
400 			   "Delayed addkey for the initial group key for AP mode\n");
401 		memset(key_rsc, 0, sizeof(key_rsc));
402 		res = ath6kl_wmi_addkey_cmd(
403 			ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
404 			GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
405 			ik->key,
406 			KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
407 		if (res) {
408 			ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
409 				   "Delayed addkey failed: %d\n", res);
410 		}
411 		break;
412 	}
413 
414 	if (ar->last_ch != channel)
415 		/* we actually don't know the phymode, default to HT20 */
416 		ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
417 
418 	ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
419 	set_bit(CONNECTED, &vif->flags);
420 	netif_carrier_on(vif->ndev);
421 }
422 
423 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
424 				u8 keymgmt, u8 ucipher, u8 auth,
425 				u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
426 {
427 	u8 *ies = NULL, *wpa_ie = NULL, *pos;
428 	size_t ies_len = 0;
429 	struct station_info *sinfo;
430 
431 	ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
432 
433 	if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
434 		struct ieee80211_mgmt *mgmt =
435 			(struct ieee80211_mgmt *) assoc_info;
436 		if (ieee80211_is_assoc_req(mgmt->frame_control) &&
437 		    assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
438 		    sizeof(mgmt->u.assoc_req)) {
439 			ies = mgmt->u.assoc_req.variable;
440 			ies_len = assoc_info + assoc_req_len - ies;
441 		} else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
442 			   assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
443 			   + sizeof(mgmt->u.reassoc_req)) {
444 			ies = mgmt->u.reassoc_req.variable;
445 			ies_len = assoc_info + assoc_req_len - ies;
446 		}
447 	}
448 
449 	pos = ies;
450 	while (pos && pos + 1 < ies + ies_len) {
451 		if (pos + 2 + pos[1] > ies + ies_len)
452 			break;
453 		if (pos[0] == WLAN_EID_RSN)
454 			wpa_ie = pos; /* RSN IE */
455 		else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
456 			 pos[1] >= 4 &&
457 			 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
458 			if (pos[5] == 0x01)
459 				wpa_ie = pos; /* WPA IE */
460 			else if (pos[5] == 0x04) {
461 				wpa_ie = pos; /* WPS IE */
462 				break; /* overrides WPA/RSN IE */
463 			}
464 		} else if (pos[0] == 0x44 && wpa_ie == NULL) {
465 			/*
466 			 * Note: WAPI Parameter Set IE re-uses Element ID that
467 			 * was officially allocated for BSS AC Access Delay. As
468 			 * such, we need to be a bit more careful on when
469 			 * parsing the frame. However, BSS AC Access Delay
470 			 * element is not supposed to be included in
471 			 * (Re)Association Request frames, so this should not
472 			 * cause problems.
473 			 */
474 			wpa_ie = pos; /* WAPI IE */
475 			break;
476 		}
477 		pos += 2 + pos[1];
478 	}
479 
480 	ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
481 			   wpa_ie ? 2 + wpa_ie[1] : 0,
482 			   keymgmt, ucipher, auth, apsd_info);
483 
484 	/* send event to application */
485 	sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
486 	if (!sinfo)
487 		return;
488 
489 	/* TODO: sinfo.generation */
490 
491 	sinfo->assoc_req_ies = ies;
492 	sinfo->assoc_req_ies_len = ies_len;
493 
494 	cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
495 
496 	netif_wake_queue(vif->ndev);
497 
498 	kfree(sinfo);
499 }
500 
501 void disconnect_timer_handler(struct timer_list *t)
502 {
503 	struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
504 
505 	ath6kl_init_profile_info(vif);
506 	ath6kl_disconnect(vif);
507 }
508 
509 void ath6kl_disconnect(struct ath6kl_vif *vif)
510 {
511 	if (test_bit(CONNECTED, &vif->flags) ||
512 	    test_bit(CONNECT_PEND, &vif->flags)) {
513 		ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
514 		/*
515 		 * Disconnect command is issued, clear the connect pending
516 		 * flag. The connected flag will be cleared in
517 		 * disconnect event notification.
518 		 */
519 		clear_bit(CONNECT_PEND, &vif->flags);
520 	}
521 }
522 
523 /* WMI Event handlers */
524 
525 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
526 			enum wmi_phy_cap cap)
527 {
528 	struct ath6kl *ar = devt;
529 
530 	memcpy(ar->mac_addr, datap, ETH_ALEN);
531 
532 	ath6kl_dbg(ATH6KL_DBG_BOOT,
533 		   "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
534 		   ar->mac_addr, sw_ver, abi_ver, cap);
535 
536 	ar->version.wlan_ver = sw_ver;
537 	ar->version.abi_ver = abi_ver;
538 	ar->hw.cap = cap;
539 
540 	if (strlen(ar->wiphy->fw_version) == 0) {
541 		snprintf(ar->wiphy->fw_version,
542 			 sizeof(ar->wiphy->fw_version),
543 			 "%u.%u.%u.%u",
544 			 (ar->version.wlan_ver & 0xf0000000) >> 28,
545 			 (ar->version.wlan_ver & 0x0f000000) >> 24,
546 			 (ar->version.wlan_ver & 0x00ff0000) >> 16,
547 			 (ar->version.wlan_ver & 0x0000ffff));
548 	}
549 
550 	/* indicate to the waiting thread that the ready event was received */
551 	set_bit(WMI_READY, &ar->flag);
552 	wake_up(&ar->event_wq);
553 }
554 
555 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
556 {
557 	struct ath6kl *ar = vif->ar;
558 	bool aborted = false;
559 
560 	if (status != WMI_SCAN_STATUS_SUCCESS)
561 		aborted = true;
562 
563 	ath6kl_cfg80211_scan_complete_event(vif, aborted);
564 
565 	if (!ar->usr_bss_filter) {
566 		clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
567 		ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
568 					 NONE_BSS_FILTER, 0);
569 	}
570 
571 	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
572 }
573 
574 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
575 {
576 	struct ath6kl *ar = vif->ar;
577 
578 	vif->profile.ch = cpu_to_le16(channel);
579 
580 	switch (vif->nw_type) {
581 	case AP_NETWORK:
582 		/*
583 		 * reconfigure any saved RSN IE capabilites in the beacon /
584 		 * probe response to stay in sync with the supplicant.
585 		 */
586 		if (vif->rsn_capab &&
587 		    test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
588 			     ar->fw_capabilities))
589 			ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
590 					      WLAN_EID_RSN, WMI_RSN_IE_CAPB,
591 					      (const u8 *) &vif->rsn_capab,
592 					      sizeof(vif->rsn_capab));
593 
594 		return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
595 						    &vif->profile);
596 	default:
597 		ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
598 		return -ENOTSUPP;
599 	}
600 }
601 
602 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
603 {
604 	struct ath6kl_vif *vif;
605 	int res = 0;
606 
607 	if (!ar->want_ch_switch)
608 		return;
609 
610 	spin_lock_bh(&ar->list_lock);
611 	list_for_each_entry(vif, &ar->vif_list, list) {
612 		if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
613 			res = ath6kl_commit_ch_switch(vif, channel);
614 
615 		/* if channel switch failed, oh well we tried */
616 		ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
617 
618 		if (res)
619 			ath6kl_err("channel switch failed nw_type %d res %d\n",
620 				   vif->nw_type, res);
621 	}
622 	spin_unlock_bh(&ar->list_lock);
623 }
624 
625 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
626 			  u16 listen_int, u16 beacon_int,
627 			  enum network_type net_type, u8 beacon_ie_len,
628 			  u8 assoc_req_len, u8 assoc_resp_len,
629 			  u8 *assoc_info)
630 {
631 	struct ath6kl *ar = vif->ar;
632 
633 	ath6kl_cfg80211_connect_event(vif, channel, bssid,
634 				      listen_int, beacon_int,
635 				      net_type, beacon_ie_len,
636 				      assoc_req_len, assoc_resp_len,
637 				      assoc_info);
638 
639 	memcpy(vif->bssid, bssid, sizeof(vif->bssid));
640 	vif->bss_ch = channel;
641 
642 	if (vif->nw_type == INFRA_NETWORK) {
643 		ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
644 					      vif->listen_intvl_t, 0);
645 		ath6kl_check_ch_switch(ar, channel);
646 	}
647 
648 	netif_wake_queue(vif->ndev);
649 
650 	/* Update connect & link status atomically */
651 	spin_lock_bh(&vif->if_lock);
652 	set_bit(CONNECTED, &vif->flags);
653 	clear_bit(CONNECT_PEND, &vif->flags);
654 	netif_carrier_on(vif->ndev);
655 	spin_unlock_bh(&vif->if_lock);
656 
657 	aggr_reset_state(vif->aggr_cntxt->aggr_conn);
658 	vif->reconnect_flag = 0;
659 
660 	if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
661 		memset(ar->node_map, 0, sizeof(ar->node_map));
662 		ar->node_num = 0;
663 		ar->next_ep_id = ENDPOINT_2;
664 	}
665 
666 	if (!ar->usr_bss_filter) {
667 		set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
668 		ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
669 					 CURRENT_BSS_FILTER, 0);
670 	}
671 }
672 
673 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
674 {
675 	struct ath6kl_sta *sta;
676 	struct ath6kl *ar = vif->ar;
677 	u8 tsc[6];
678 
679 	/*
680 	 * For AP case, keyid will have aid of STA which sent pkt with
681 	 * MIC error. Use this aid to get MAC & send it to hostapd.
682 	 */
683 	if (vif->nw_type == AP_NETWORK) {
684 		sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
685 		if (!sta)
686 			return;
687 
688 		ath6kl_dbg(ATH6KL_DBG_TRC,
689 			   "ap tkip mic error received from aid=%d\n", keyid);
690 
691 		memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
692 		cfg80211_michael_mic_failure(vif->ndev, sta->mac,
693 					     NL80211_KEYTYPE_PAIRWISE, keyid,
694 					     tsc, GFP_KERNEL);
695 	} else {
696 		ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
697 	}
698 }
699 
700 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
701 {
702 	struct wmi_target_stats *tgt_stats =
703 		(struct wmi_target_stats *) ptr;
704 	struct ath6kl *ar = vif->ar;
705 	struct target_stats *stats = &vif->target_stats;
706 	struct tkip_ccmp_stats *ccmp_stats;
707 	s32 rate;
708 	u8 ac;
709 
710 	if (len < sizeof(*tgt_stats))
711 		return;
712 
713 	ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
714 
715 	stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
716 	stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
717 	stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
718 	stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
719 	stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
720 	stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
721 	stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
722 	stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
723 	stats->tx_rts_success_cnt +=
724 		le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
725 
726 	for (ac = 0; ac < WMM_NUM_AC; ac++)
727 		stats->tx_pkt_per_ac[ac] +=
728 			le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
729 
730 	stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
731 	stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
732 	stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
733 	stats->tx_mult_retry_cnt +=
734 		le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
735 	stats->tx_rts_fail_cnt +=
736 		le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
737 
738 	rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
739 	stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
740 
741 	stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
742 	stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
743 	stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
744 	stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
745 	stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
746 	stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
747 	stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
748 	stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
749 	stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
750 	stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
751 	stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
752 	stats->rx_key_cache_miss +=
753 		le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
754 	stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
755 	stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
756 
757 	rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
758 	stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
759 
760 	ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
761 
762 	stats->tkip_local_mic_fail +=
763 		le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
764 	stats->tkip_cnter_measures_invoked +=
765 		le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
766 	stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
767 
768 	stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
769 	stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
770 
771 	stats->pwr_save_fail_cnt +=
772 		le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
773 	stats->noise_floor_calib =
774 		a_sle32_to_cpu(tgt_stats->noise_floor_calib);
775 
776 	stats->cs_bmiss_cnt +=
777 		le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
778 	stats->cs_low_rssi_cnt +=
779 		le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
780 	stats->cs_connect_cnt +=
781 		le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
782 	stats->cs_discon_cnt +=
783 		le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
784 
785 	stats->cs_ave_beacon_rssi =
786 		a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
787 
788 	stats->cs_last_roam_msec =
789 		tgt_stats->cserv_stats.cs_last_roam_msec;
790 	stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
791 	stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
792 
793 	stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
794 
795 	stats->wow_pkt_dropped +=
796 		le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
797 	stats->wow_host_pkt_wakeups +=
798 		tgt_stats->wow_stats.wow_host_pkt_wakeups;
799 	stats->wow_host_evt_wakeups +=
800 		tgt_stats->wow_stats.wow_host_evt_wakeups;
801 	stats->wow_evt_discarded +=
802 		le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
803 
804 	stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
805 	stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
806 	stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
807 
808 	if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
809 		clear_bit(STATS_UPDATE_PEND, &vif->flags);
810 		wake_up(&ar->event_wq);
811 	}
812 }
813 
814 static void ath6kl_add_le32(__le32 *var, __le32 val)
815 {
816 	*var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
817 }
818 
819 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
820 {
821 	struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
822 	struct ath6kl *ar = vif->ar;
823 	struct wmi_ap_mode_stat *ap = &ar->ap_stats;
824 	struct wmi_per_sta_stat *st_ap, *st_p;
825 	u8 ac;
826 
827 	if (vif->nw_type == AP_NETWORK) {
828 		if (len < sizeof(*p))
829 			return;
830 
831 		for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
832 			st_ap = &ap->sta[ac];
833 			st_p = &p->sta[ac];
834 
835 			ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
836 			ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
837 			ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
838 			ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
839 			ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
840 			ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
841 			ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
842 			ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
843 		}
844 
845 	} else {
846 		ath6kl_update_target_stats(vif, ptr, len);
847 	}
848 }
849 
850 void ath6kl_wakeup_event(void *dev)
851 {
852 	struct ath6kl *ar = (struct ath6kl *) dev;
853 
854 	wake_up(&ar->event_wq);
855 }
856 
857 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
858 {
859 	struct ath6kl *ar = (struct ath6kl *) devt;
860 
861 	ar->tx_pwr = tx_pwr;
862 	wake_up(&ar->event_wq);
863 }
864 
865 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
866 {
867 	struct ath6kl_sta *conn;
868 	struct sk_buff *skb;
869 	bool psq_empty = false;
870 	struct ath6kl *ar = vif->ar;
871 	struct ath6kl_mgmt_buff *mgmt_buf;
872 
873 	conn = ath6kl_find_sta_by_aid(ar, aid);
874 
875 	if (!conn)
876 		return;
877 	/*
878 	 * Send out a packet queued on ps queue. When the ps queue
879 	 * becomes empty update the PVB for this station.
880 	 */
881 	spin_lock_bh(&conn->psq_lock);
882 	psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
883 	spin_unlock_bh(&conn->psq_lock);
884 
885 	if (psq_empty)
886 		/* TODO: Send out a NULL data frame */
887 		return;
888 
889 	spin_lock_bh(&conn->psq_lock);
890 	if (conn->mgmt_psq_len > 0) {
891 		mgmt_buf = list_first_entry(&conn->mgmt_psq,
892 					struct ath6kl_mgmt_buff, list);
893 		list_del(&mgmt_buf->list);
894 		conn->mgmt_psq_len--;
895 		spin_unlock_bh(&conn->psq_lock);
896 
897 		conn->sta_flags |= STA_PS_POLLED;
898 		ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
899 					 mgmt_buf->id, mgmt_buf->freq,
900 					 mgmt_buf->wait, mgmt_buf->buf,
901 					 mgmt_buf->len, mgmt_buf->no_cck);
902 		conn->sta_flags &= ~STA_PS_POLLED;
903 		kfree(mgmt_buf);
904 	} else {
905 		skb = skb_dequeue(&conn->psq);
906 		spin_unlock_bh(&conn->psq_lock);
907 
908 		conn->sta_flags |= STA_PS_POLLED;
909 		ath6kl_data_tx(skb, vif->ndev);
910 		conn->sta_flags &= ~STA_PS_POLLED;
911 	}
912 
913 	spin_lock_bh(&conn->psq_lock);
914 	psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
915 	spin_unlock_bh(&conn->psq_lock);
916 
917 	if (psq_empty)
918 		ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
919 }
920 
921 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
922 {
923 	bool mcastq_empty = false;
924 	struct sk_buff *skb;
925 	struct ath6kl *ar = vif->ar;
926 
927 	/*
928 	 * If there are no associated STAs, ignore the DTIM expiry event.
929 	 * There can be potential race conditions where the last associated
930 	 * STA may disconnect & before the host could clear the 'Indicate
931 	 * DTIM' request to the firmware, the firmware would have just
932 	 * indicated a DTIM expiry event. The race is between 'clear DTIM
933 	 * expiry cmd' going from the host to the firmware & the DTIM
934 	 * expiry event happening from the firmware to the host.
935 	 */
936 	if (!ar->sta_list_index)
937 		return;
938 
939 	spin_lock_bh(&ar->mcastpsq_lock);
940 	mcastq_empty = skb_queue_empty(&ar->mcastpsq);
941 	spin_unlock_bh(&ar->mcastpsq_lock);
942 
943 	if (mcastq_empty)
944 		return;
945 
946 	/* set the STA flag to dtim_expired for the frame to go out */
947 	set_bit(DTIM_EXPIRED, &vif->flags);
948 
949 	spin_lock_bh(&ar->mcastpsq_lock);
950 	while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
951 		spin_unlock_bh(&ar->mcastpsq_lock);
952 
953 		ath6kl_data_tx(skb, vif->ndev);
954 
955 		spin_lock_bh(&ar->mcastpsq_lock);
956 	}
957 	spin_unlock_bh(&ar->mcastpsq_lock);
958 
959 	clear_bit(DTIM_EXPIRED, &vif->flags);
960 
961 	/* clear the LSB of the BitMapCtl field of the TIM IE */
962 	ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
963 }
964 
965 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
966 			     u8 assoc_resp_len, u8 *assoc_info,
967 			     u16 prot_reason_status)
968 {
969 	struct ath6kl *ar = vif->ar;
970 
971 	if (vif->nw_type == AP_NETWORK) {
972 		/* disconnect due to other STA vif switching channels */
973 		if (reason == BSS_DISCONNECTED &&
974 		    prot_reason_status == WMI_AP_REASON_STA_ROAM) {
975 			ar->want_ch_switch |= 1 << vif->fw_vif_idx;
976 			/* bail back to this channel if STA vif fails connect */
977 			ar->last_ch = le16_to_cpu(vif->profile.ch);
978 		}
979 
980 		if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
981 			/* send max client reached notification to user space */
982 			cfg80211_conn_failed(vif->ndev, bssid,
983 					     NL80211_CONN_FAIL_MAX_CLIENTS,
984 					     GFP_KERNEL);
985 		}
986 
987 		if (prot_reason_status == WMI_AP_REASON_ACL) {
988 			/* send blocked client notification to user space */
989 			cfg80211_conn_failed(vif->ndev, bssid,
990 					     NL80211_CONN_FAIL_BLOCKED_CLIENT,
991 					     GFP_KERNEL);
992 		}
993 
994 		if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
995 			return;
996 
997 		/* if no more associated STAs, empty the mcast PS q */
998 		if (ar->sta_list_index == 0) {
999 			spin_lock_bh(&ar->mcastpsq_lock);
1000 			skb_queue_purge(&ar->mcastpsq);
1001 			spin_unlock_bh(&ar->mcastpsq_lock);
1002 
1003 			/* clear the LSB of the TIM IE's BitMapCtl field */
1004 			if (test_bit(WMI_READY, &ar->flag))
1005 				ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1006 						       MCAST_AID, 0);
1007 		}
1008 
1009 		if (!is_broadcast_ether_addr(bssid)) {
1010 			/* send event to application */
1011 			cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1012 		}
1013 
1014 		if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1015 			memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1016 			clear_bit(CONNECTED, &vif->flags);
1017 		}
1018 		return;
1019 	}
1020 
1021 	ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1022 					 assoc_resp_len, assoc_info,
1023 					 prot_reason_status);
1024 
1025 	aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1026 
1027 	del_timer(&vif->disconnect_timer);
1028 
1029 	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1030 
1031 	/*
1032 	 * If the event is due to disconnect cmd from the host, only they
1033 	 * the target would stop trying to connect. Under any other
1034 	 * condition, target would keep trying to connect.
1035 	 */
1036 	if (reason == DISCONNECT_CMD) {
1037 		if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1038 			ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1039 						 NONE_BSS_FILTER, 0);
1040 	} else {
1041 		set_bit(CONNECT_PEND, &vif->flags);
1042 		if (((reason == ASSOC_FAILED) &&
1043 		     (prot_reason_status == 0x11)) ||
1044 		    ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1045 		     (vif->reconnect_flag == 1))) {
1046 			set_bit(CONNECTED, &vif->flags);
1047 			return;
1048 		}
1049 	}
1050 
1051 	/* restart disconnected concurrent vifs waiting for new channel */
1052 	ath6kl_check_ch_switch(ar, ar->last_ch);
1053 
1054 	/* update connect & link status atomically */
1055 	spin_lock_bh(&vif->if_lock);
1056 	clear_bit(CONNECTED, &vif->flags);
1057 	netif_carrier_off(vif->ndev);
1058 	spin_unlock_bh(&vif->if_lock);
1059 
1060 	if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1061 		vif->reconnect_flag = 0;
1062 
1063 	if (reason != CSERV_DISCONNECT)
1064 		ar->user_key_ctrl = 0;
1065 
1066 	netif_stop_queue(vif->ndev);
1067 	memset(vif->bssid, 0, sizeof(vif->bssid));
1068 	vif->bss_ch = 0;
1069 
1070 	ath6kl_tx_data_cleanup(ar);
1071 }
1072 
1073 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1074 {
1075 	struct ath6kl_vif *vif;
1076 
1077 	spin_lock_bh(&ar->list_lock);
1078 	if (list_empty(&ar->vif_list)) {
1079 		spin_unlock_bh(&ar->list_lock);
1080 		return NULL;
1081 	}
1082 
1083 	vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1084 
1085 	spin_unlock_bh(&ar->list_lock);
1086 
1087 	return vif;
1088 }
1089 
1090 static int ath6kl_open(struct net_device *dev)
1091 {
1092 	struct ath6kl_vif *vif = netdev_priv(dev);
1093 
1094 	set_bit(WLAN_ENABLED, &vif->flags);
1095 
1096 	if (test_bit(CONNECTED, &vif->flags)) {
1097 		netif_carrier_on(dev);
1098 		netif_wake_queue(dev);
1099 	} else {
1100 		netif_carrier_off(dev);
1101 	}
1102 
1103 	return 0;
1104 }
1105 
1106 static int ath6kl_close(struct net_device *dev)
1107 {
1108 	struct ath6kl_vif *vif = netdev_priv(dev);
1109 
1110 	netif_stop_queue(dev);
1111 
1112 	ath6kl_cfg80211_stop(vif);
1113 
1114 	clear_bit(WLAN_ENABLED, &vif->flags);
1115 
1116 	return 0;
1117 }
1118 
1119 static int ath6kl_set_features(struct net_device *dev,
1120 			       netdev_features_t features)
1121 {
1122 	struct ath6kl_vif *vif = netdev_priv(dev);
1123 	struct ath6kl *ar = vif->ar;
1124 	int err = 0;
1125 
1126 	if ((features & NETIF_F_RXCSUM) &&
1127 	    (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1128 		ar->rx_meta_ver = WMI_META_VERSION_2;
1129 		err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1130 							 vif->fw_vif_idx,
1131 							 ar->rx_meta_ver, 0, 0);
1132 		if (err) {
1133 			dev->features = features & ~NETIF_F_RXCSUM;
1134 			return err;
1135 		}
1136 	} else if (!(features & NETIF_F_RXCSUM) &&
1137 		   (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1138 		ar->rx_meta_ver = 0;
1139 		err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1140 							 vif->fw_vif_idx,
1141 							 ar->rx_meta_ver, 0, 0);
1142 		if (err) {
1143 			dev->features = features | NETIF_F_RXCSUM;
1144 			return err;
1145 		}
1146 	}
1147 
1148 	return err;
1149 }
1150 
1151 static void ath6kl_set_multicast_list(struct net_device *ndev)
1152 {
1153 	struct ath6kl_vif *vif = netdev_priv(ndev);
1154 	bool mc_all_on = false;
1155 	int mc_count = netdev_mc_count(ndev);
1156 	struct netdev_hw_addr *ha;
1157 	bool found;
1158 	struct ath6kl_mc_filter *mc_filter, *tmp;
1159 	struct list_head mc_filter_new;
1160 	int ret;
1161 
1162 	if (!test_bit(WMI_READY, &vif->ar->flag) ||
1163 	    !test_bit(WLAN_ENABLED, &vif->flags))
1164 		return;
1165 
1166 	/* Enable multicast-all filter. */
1167 	mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1168 		    !!(ndev->flags & IFF_ALLMULTI) ||
1169 		    !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1170 
1171 	if (mc_all_on)
1172 		set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1173 	else
1174 		clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1175 
1176 	if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1177 		     vif->ar->fw_capabilities)) {
1178 		mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1179 	}
1180 
1181 	if (!(ndev->flags & IFF_MULTICAST)) {
1182 		mc_all_on = false;
1183 		set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1184 	} else {
1185 		clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1186 	}
1187 
1188 	/* Enable/disable "multicast-all" filter*/
1189 	ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1190 		   mc_all_on ? "enabling" : "disabling");
1191 
1192 	ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1193 						  mc_all_on);
1194 	if (ret) {
1195 		ath6kl_warn("Failed to %s multicast-all receive\n",
1196 			    mc_all_on ? "enable" : "disable");
1197 		return;
1198 	}
1199 
1200 	if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1201 		return;
1202 
1203 	/* Keep the driver and firmware mcast list in sync. */
1204 	list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1205 		found = false;
1206 		netdev_for_each_mc_addr(ha, ndev) {
1207 			if (memcmp(ha->addr, mc_filter->hw_addr,
1208 				   ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1209 				found = true;
1210 				break;
1211 			}
1212 		}
1213 
1214 		if (!found) {
1215 			/*
1216 			 * Delete the filter which was previously set
1217 			 * but not in the new request.
1218 			 */
1219 			ath6kl_dbg(ATH6KL_DBG_TRC,
1220 				   "Removing %pM from multicast filter\n",
1221 				   mc_filter->hw_addr);
1222 			ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1223 					vif->fw_vif_idx, mc_filter->hw_addr,
1224 					false);
1225 			if (ret) {
1226 				ath6kl_warn("Failed to remove multicast filter:%pM\n",
1227 					    mc_filter->hw_addr);
1228 				return;
1229 			}
1230 
1231 			list_del(&mc_filter->list);
1232 			kfree(mc_filter);
1233 		}
1234 	}
1235 
1236 	INIT_LIST_HEAD(&mc_filter_new);
1237 
1238 	netdev_for_each_mc_addr(ha, ndev) {
1239 		found = false;
1240 		list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1241 			if (memcmp(ha->addr, mc_filter->hw_addr,
1242 				   ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1243 				found = true;
1244 				break;
1245 			}
1246 		}
1247 
1248 		if (!found) {
1249 			mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1250 					    GFP_ATOMIC);
1251 			if (!mc_filter) {
1252 				WARN_ON(1);
1253 				goto out;
1254 			}
1255 
1256 			memcpy(mc_filter->hw_addr, ha->addr,
1257 			       ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1258 			/* Set the multicast filter */
1259 			ath6kl_dbg(ATH6KL_DBG_TRC,
1260 				   "Adding %pM to multicast filter list\n",
1261 				   mc_filter->hw_addr);
1262 			ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1263 					vif->fw_vif_idx, mc_filter->hw_addr,
1264 					true);
1265 			if (ret) {
1266 				ath6kl_warn("Failed to add multicast filter :%pM\n",
1267 					    mc_filter->hw_addr);
1268 				kfree(mc_filter);
1269 				goto out;
1270 			}
1271 
1272 			list_add_tail(&mc_filter->list, &mc_filter_new);
1273 		}
1274 	}
1275 
1276 out:
1277 	list_splice_tail(&mc_filter_new, &vif->mc_filter);
1278 }
1279 
1280 static const struct net_device_ops ath6kl_netdev_ops = {
1281 	.ndo_open               = ath6kl_open,
1282 	.ndo_stop               = ath6kl_close,
1283 	.ndo_start_xmit         = ath6kl_data_tx,
1284 	.ndo_set_features       = ath6kl_set_features,
1285 	.ndo_set_rx_mode	= ath6kl_set_multicast_list,
1286 };
1287 
1288 void init_netdev(struct net_device *dev)
1289 {
1290 	struct ath6kl *ar = ath6kl_priv(dev);
1291 
1292 	dev->netdev_ops = &ath6kl_netdev_ops;
1293 	dev->needs_free_netdev = true;
1294 	dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1295 
1296 	dev->needed_headroom = ETH_HLEN;
1297 	dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1298 					sizeof(struct wmi_data_hdr) +
1299 					HTC_HDR_LENGTH +
1300 					WMI_MAX_TX_META_SZ +
1301 					ATH6KL_HTC_ALIGN_BYTES, 4);
1302 
1303 	if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1304 		      ar->fw_capabilities))
1305 		dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1306 
1307 	return;
1308 }
1309