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 		fallthrough;
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 (aid < 1 || aid > AP_MAX_NUM_STA)
434 		return;
435 
436 	if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
437 		struct ieee80211_mgmt *mgmt =
438 			(struct ieee80211_mgmt *) assoc_info;
439 		if (ieee80211_is_assoc_req(mgmt->frame_control) &&
440 		    assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
441 		    sizeof(mgmt->u.assoc_req)) {
442 			ies = mgmt->u.assoc_req.variable;
443 			ies_len = assoc_info + assoc_req_len - ies;
444 		} else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
445 			   assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
446 			   + sizeof(mgmt->u.reassoc_req)) {
447 			ies = mgmt->u.reassoc_req.variable;
448 			ies_len = assoc_info + assoc_req_len - ies;
449 		}
450 	}
451 
452 	pos = ies;
453 	while (pos && pos + 1 < ies + ies_len) {
454 		if (pos + 2 + pos[1] > ies + ies_len)
455 			break;
456 		if (pos[0] == WLAN_EID_RSN)
457 			wpa_ie = pos; /* RSN IE */
458 		else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
459 			 pos[1] >= 4 &&
460 			 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
461 			if (pos[5] == 0x01)
462 				wpa_ie = pos; /* WPA IE */
463 			else if (pos[5] == 0x04) {
464 				wpa_ie = pos; /* WPS IE */
465 				break; /* overrides WPA/RSN IE */
466 			}
467 		} else if (pos[0] == 0x44 && wpa_ie == NULL) {
468 			/*
469 			 * Note: WAPI Parameter Set IE re-uses Element ID that
470 			 * was officially allocated for BSS AC Access Delay. As
471 			 * such, we need to be a bit more careful on when
472 			 * parsing the frame. However, BSS AC Access Delay
473 			 * element is not supposed to be included in
474 			 * (Re)Association Request frames, so this should not
475 			 * cause problems.
476 			 */
477 			wpa_ie = pos; /* WAPI IE */
478 			break;
479 		}
480 		pos += 2 + pos[1];
481 	}
482 
483 	ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
484 			   wpa_ie ? 2 + wpa_ie[1] : 0,
485 			   keymgmt, ucipher, auth, apsd_info);
486 
487 	/* send event to application */
488 	sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
489 	if (!sinfo)
490 		return;
491 
492 	/* TODO: sinfo.generation */
493 
494 	sinfo->assoc_req_ies = ies;
495 	sinfo->assoc_req_ies_len = ies_len;
496 
497 	cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
498 
499 	netif_wake_queue(vif->ndev);
500 
501 	kfree(sinfo);
502 }
503 
504 void disconnect_timer_handler(struct timer_list *t)
505 {
506 	struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
507 
508 	ath6kl_init_profile_info(vif);
509 	ath6kl_disconnect(vif);
510 }
511 
512 void ath6kl_disconnect(struct ath6kl_vif *vif)
513 {
514 	if (test_bit(CONNECTED, &vif->flags) ||
515 	    test_bit(CONNECT_PEND, &vif->flags)) {
516 		ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
517 		/*
518 		 * Disconnect command is issued, clear the connect pending
519 		 * flag. The connected flag will be cleared in
520 		 * disconnect event notification.
521 		 */
522 		clear_bit(CONNECT_PEND, &vif->flags);
523 	}
524 }
525 
526 /* WMI Event handlers */
527 
528 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
529 			enum wmi_phy_cap cap)
530 {
531 	struct ath6kl *ar = devt;
532 
533 	memcpy(ar->mac_addr, datap, ETH_ALEN);
534 
535 	ath6kl_dbg(ATH6KL_DBG_BOOT,
536 		   "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
537 		   ar->mac_addr, sw_ver, abi_ver, cap);
538 
539 	ar->version.wlan_ver = sw_ver;
540 	ar->version.abi_ver = abi_ver;
541 	ar->hw.cap = cap;
542 
543 	if (strlen(ar->wiphy->fw_version) == 0) {
544 		snprintf(ar->wiphy->fw_version,
545 			 sizeof(ar->wiphy->fw_version),
546 			 "%u.%u.%u.%u",
547 			 (ar->version.wlan_ver & 0xf0000000) >> 28,
548 			 (ar->version.wlan_ver & 0x0f000000) >> 24,
549 			 (ar->version.wlan_ver & 0x00ff0000) >> 16,
550 			 (ar->version.wlan_ver & 0x0000ffff));
551 	}
552 
553 	/* indicate to the waiting thread that the ready event was received */
554 	set_bit(WMI_READY, &ar->flag);
555 	wake_up(&ar->event_wq);
556 }
557 
558 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
559 {
560 	struct ath6kl *ar = vif->ar;
561 	bool aborted = false;
562 
563 	if (status != WMI_SCAN_STATUS_SUCCESS)
564 		aborted = true;
565 
566 	ath6kl_cfg80211_scan_complete_event(vif, aborted);
567 
568 	if (!ar->usr_bss_filter) {
569 		clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
570 		ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
571 					 NONE_BSS_FILTER, 0);
572 	}
573 
574 	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
575 }
576 
577 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
578 {
579 	struct ath6kl *ar = vif->ar;
580 
581 	vif->profile.ch = cpu_to_le16(channel);
582 
583 	switch (vif->nw_type) {
584 	case AP_NETWORK:
585 		/*
586 		 * reconfigure any saved RSN IE capabilites in the beacon /
587 		 * probe response to stay in sync with the supplicant.
588 		 */
589 		if (vif->rsn_capab &&
590 		    test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
591 			     ar->fw_capabilities))
592 			ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
593 					      WLAN_EID_RSN, WMI_RSN_IE_CAPB,
594 					      (const u8 *) &vif->rsn_capab,
595 					      sizeof(vif->rsn_capab));
596 
597 		return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
598 						    &vif->profile);
599 	default:
600 		ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
601 		return -ENOTSUPP;
602 	}
603 }
604 
605 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
606 {
607 	struct ath6kl_vif *vif;
608 	int res = 0;
609 
610 	if (!ar->want_ch_switch)
611 		return;
612 
613 	spin_lock_bh(&ar->list_lock);
614 	list_for_each_entry(vif, &ar->vif_list, list) {
615 		if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
616 			res = ath6kl_commit_ch_switch(vif, channel);
617 
618 		/* if channel switch failed, oh well we tried */
619 		ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
620 
621 		if (res)
622 			ath6kl_err("channel switch failed nw_type %d res %d\n",
623 				   vif->nw_type, res);
624 	}
625 	spin_unlock_bh(&ar->list_lock);
626 }
627 
628 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
629 			  u16 listen_int, u16 beacon_int,
630 			  enum network_type net_type, u8 beacon_ie_len,
631 			  u8 assoc_req_len, u8 assoc_resp_len,
632 			  u8 *assoc_info)
633 {
634 	struct ath6kl *ar = vif->ar;
635 
636 	ath6kl_cfg80211_connect_event(vif, channel, bssid,
637 				      listen_int, beacon_int,
638 				      net_type, beacon_ie_len,
639 				      assoc_req_len, assoc_resp_len,
640 				      assoc_info);
641 
642 	memcpy(vif->bssid, bssid, sizeof(vif->bssid));
643 	vif->bss_ch = channel;
644 
645 	if (vif->nw_type == INFRA_NETWORK) {
646 		ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
647 					      vif->listen_intvl_t, 0);
648 		ath6kl_check_ch_switch(ar, channel);
649 	}
650 
651 	netif_wake_queue(vif->ndev);
652 
653 	/* Update connect & link status atomically */
654 	spin_lock_bh(&vif->if_lock);
655 	set_bit(CONNECTED, &vif->flags);
656 	clear_bit(CONNECT_PEND, &vif->flags);
657 	netif_carrier_on(vif->ndev);
658 	spin_unlock_bh(&vif->if_lock);
659 
660 	aggr_reset_state(vif->aggr_cntxt->aggr_conn);
661 	vif->reconnect_flag = 0;
662 
663 	if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
664 		memset(ar->node_map, 0, sizeof(ar->node_map));
665 		ar->node_num = 0;
666 		ar->next_ep_id = ENDPOINT_2;
667 	}
668 
669 	if (!ar->usr_bss_filter) {
670 		set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
671 		ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
672 					 CURRENT_BSS_FILTER, 0);
673 	}
674 }
675 
676 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
677 {
678 	struct ath6kl_sta *sta;
679 	struct ath6kl *ar = vif->ar;
680 	u8 tsc[6];
681 
682 	/*
683 	 * For AP case, keyid will have aid of STA which sent pkt with
684 	 * MIC error. Use this aid to get MAC & send it to hostapd.
685 	 */
686 	if (vif->nw_type == AP_NETWORK) {
687 		sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
688 		if (!sta)
689 			return;
690 
691 		ath6kl_dbg(ATH6KL_DBG_TRC,
692 			   "ap tkip mic error received from aid=%d\n", keyid);
693 
694 		memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
695 		cfg80211_michael_mic_failure(vif->ndev, sta->mac,
696 					     NL80211_KEYTYPE_PAIRWISE, keyid,
697 					     tsc, GFP_KERNEL);
698 	} else {
699 		ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
700 	}
701 }
702 
703 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
704 {
705 	struct wmi_target_stats *tgt_stats =
706 		(struct wmi_target_stats *) ptr;
707 	struct ath6kl *ar = vif->ar;
708 	struct target_stats *stats = &vif->target_stats;
709 	struct tkip_ccmp_stats *ccmp_stats;
710 	s32 rate;
711 	u8 ac;
712 
713 	if (len < sizeof(*tgt_stats))
714 		return;
715 
716 	ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
717 
718 	stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
719 	stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
720 	stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
721 	stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
722 	stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
723 	stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
724 	stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
725 	stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
726 	stats->tx_rts_success_cnt +=
727 		le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
728 
729 	for (ac = 0; ac < WMM_NUM_AC; ac++)
730 		stats->tx_pkt_per_ac[ac] +=
731 			le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
732 
733 	stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
734 	stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
735 	stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
736 	stats->tx_mult_retry_cnt +=
737 		le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
738 	stats->tx_rts_fail_cnt +=
739 		le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
740 
741 	rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
742 	stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
743 
744 	stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
745 	stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
746 	stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
747 	stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
748 	stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
749 	stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
750 	stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
751 	stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
752 	stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
753 	stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
754 	stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
755 	stats->rx_key_cache_miss +=
756 		le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
757 	stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
758 	stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
759 
760 	rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
761 	stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
762 
763 	ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
764 
765 	stats->tkip_local_mic_fail +=
766 		le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
767 	stats->tkip_cnter_measures_invoked +=
768 		le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
769 	stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
770 
771 	stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
772 	stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
773 
774 	stats->pwr_save_fail_cnt +=
775 		le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
776 	stats->noise_floor_calib =
777 		a_sle32_to_cpu(tgt_stats->noise_floor_calib);
778 
779 	stats->cs_bmiss_cnt +=
780 		le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
781 	stats->cs_low_rssi_cnt +=
782 		le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
783 	stats->cs_connect_cnt +=
784 		le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
785 	stats->cs_discon_cnt +=
786 		le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
787 
788 	stats->cs_ave_beacon_rssi =
789 		a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
790 
791 	stats->cs_last_roam_msec =
792 		tgt_stats->cserv_stats.cs_last_roam_msec;
793 	stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
794 	stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
795 
796 	stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
797 
798 	stats->wow_pkt_dropped +=
799 		le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
800 	stats->wow_host_pkt_wakeups +=
801 		tgt_stats->wow_stats.wow_host_pkt_wakeups;
802 	stats->wow_host_evt_wakeups +=
803 		tgt_stats->wow_stats.wow_host_evt_wakeups;
804 	stats->wow_evt_discarded +=
805 		le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
806 
807 	stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
808 	stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
809 	stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
810 
811 	if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
812 		clear_bit(STATS_UPDATE_PEND, &vif->flags);
813 		wake_up(&ar->event_wq);
814 	}
815 }
816 
817 static void ath6kl_add_le32(__le32 *var, __le32 val)
818 {
819 	*var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
820 }
821 
822 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
823 {
824 	struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
825 	struct ath6kl *ar = vif->ar;
826 	struct wmi_ap_mode_stat *ap = &ar->ap_stats;
827 	struct wmi_per_sta_stat *st_ap, *st_p;
828 	u8 ac;
829 
830 	if (vif->nw_type == AP_NETWORK) {
831 		if (len < sizeof(*p))
832 			return;
833 
834 		for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
835 			st_ap = &ap->sta[ac];
836 			st_p = &p->sta[ac];
837 
838 			ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
839 			ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
840 			ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
841 			ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
842 			ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
843 			ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
844 			ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
845 			ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
846 		}
847 
848 	} else {
849 		ath6kl_update_target_stats(vif, ptr, len);
850 	}
851 }
852 
853 void ath6kl_wakeup_event(void *dev)
854 {
855 	struct ath6kl *ar = (struct ath6kl *) dev;
856 
857 	wake_up(&ar->event_wq);
858 }
859 
860 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
861 {
862 	struct ath6kl *ar = (struct ath6kl *) devt;
863 
864 	ar->tx_pwr = tx_pwr;
865 	wake_up(&ar->event_wq);
866 }
867 
868 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
869 {
870 	struct ath6kl_sta *conn;
871 	struct sk_buff *skb;
872 	bool psq_empty = false;
873 	struct ath6kl *ar = vif->ar;
874 	struct ath6kl_mgmt_buff *mgmt_buf;
875 
876 	conn = ath6kl_find_sta_by_aid(ar, aid);
877 
878 	if (!conn)
879 		return;
880 	/*
881 	 * Send out a packet queued on ps queue. When the ps queue
882 	 * becomes empty update the PVB for this station.
883 	 */
884 	spin_lock_bh(&conn->psq_lock);
885 	psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
886 	spin_unlock_bh(&conn->psq_lock);
887 
888 	if (psq_empty)
889 		/* TODO: Send out a NULL data frame */
890 		return;
891 
892 	spin_lock_bh(&conn->psq_lock);
893 	if (conn->mgmt_psq_len > 0) {
894 		mgmt_buf = list_first_entry(&conn->mgmt_psq,
895 					struct ath6kl_mgmt_buff, list);
896 		list_del(&mgmt_buf->list);
897 		conn->mgmt_psq_len--;
898 		spin_unlock_bh(&conn->psq_lock);
899 
900 		conn->sta_flags |= STA_PS_POLLED;
901 		ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
902 					 mgmt_buf->id, mgmt_buf->freq,
903 					 mgmt_buf->wait, mgmt_buf->buf,
904 					 mgmt_buf->len, mgmt_buf->no_cck);
905 		conn->sta_flags &= ~STA_PS_POLLED;
906 		kfree(mgmt_buf);
907 	} else {
908 		skb = skb_dequeue(&conn->psq);
909 		spin_unlock_bh(&conn->psq_lock);
910 
911 		conn->sta_flags |= STA_PS_POLLED;
912 		ath6kl_data_tx(skb, vif->ndev);
913 		conn->sta_flags &= ~STA_PS_POLLED;
914 	}
915 
916 	spin_lock_bh(&conn->psq_lock);
917 	psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
918 	spin_unlock_bh(&conn->psq_lock);
919 
920 	if (psq_empty)
921 		ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
922 }
923 
924 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
925 {
926 	bool mcastq_empty = false;
927 	struct sk_buff *skb;
928 	struct ath6kl *ar = vif->ar;
929 
930 	/*
931 	 * If there are no associated STAs, ignore the DTIM expiry event.
932 	 * There can be potential race conditions where the last associated
933 	 * STA may disconnect & before the host could clear the 'Indicate
934 	 * DTIM' request to the firmware, the firmware would have just
935 	 * indicated a DTIM expiry event. The race is between 'clear DTIM
936 	 * expiry cmd' going from the host to the firmware & the DTIM
937 	 * expiry event happening from the firmware to the host.
938 	 */
939 	if (!ar->sta_list_index)
940 		return;
941 
942 	spin_lock_bh(&ar->mcastpsq_lock);
943 	mcastq_empty = skb_queue_empty(&ar->mcastpsq);
944 	spin_unlock_bh(&ar->mcastpsq_lock);
945 
946 	if (mcastq_empty)
947 		return;
948 
949 	/* set the STA flag to dtim_expired for the frame to go out */
950 	set_bit(DTIM_EXPIRED, &vif->flags);
951 
952 	spin_lock_bh(&ar->mcastpsq_lock);
953 	while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
954 		spin_unlock_bh(&ar->mcastpsq_lock);
955 
956 		ath6kl_data_tx(skb, vif->ndev);
957 
958 		spin_lock_bh(&ar->mcastpsq_lock);
959 	}
960 	spin_unlock_bh(&ar->mcastpsq_lock);
961 
962 	clear_bit(DTIM_EXPIRED, &vif->flags);
963 
964 	/* clear the LSB of the BitMapCtl field of the TIM IE */
965 	ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
966 }
967 
968 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
969 			     u8 assoc_resp_len, u8 *assoc_info,
970 			     u16 prot_reason_status)
971 {
972 	struct ath6kl *ar = vif->ar;
973 
974 	if (vif->nw_type == AP_NETWORK) {
975 		/* disconnect due to other STA vif switching channels */
976 		if (reason == BSS_DISCONNECTED &&
977 		    prot_reason_status == WMI_AP_REASON_STA_ROAM) {
978 			ar->want_ch_switch |= 1 << vif->fw_vif_idx;
979 			/* bail back to this channel if STA vif fails connect */
980 			ar->last_ch = le16_to_cpu(vif->profile.ch);
981 		}
982 
983 		if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
984 			/* send max client reached notification to user space */
985 			cfg80211_conn_failed(vif->ndev, bssid,
986 					     NL80211_CONN_FAIL_MAX_CLIENTS,
987 					     GFP_KERNEL);
988 		}
989 
990 		if (prot_reason_status == WMI_AP_REASON_ACL) {
991 			/* send blocked client notification to user space */
992 			cfg80211_conn_failed(vif->ndev, bssid,
993 					     NL80211_CONN_FAIL_BLOCKED_CLIENT,
994 					     GFP_KERNEL);
995 		}
996 
997 		if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
998 			return;
999 
1000 		/* if no more associated STAs, empty the mcast PS q */
1001 		if (ar->sta_list_index == 0) {
1002 			spin_lock_bh(&ar->mcastpsq_lock);
1003 			skb_queue_purge(&ar->mcastpsq);
1004 			spin_unlock_bh(&ar->mcastpsq_lock);
1005 
1006 			/* clear the LSB of the TIM IE's BitMapCtl field */
1007 			if (test_bit(WMI_READY, &ar->flag))
1008 				ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1009 						       MCAST_AID, 0);
1010 		}
1011 
1012 		if (!is_broadcast_ether_addr(bssid)) {
1013 			/* send event to application */
1014 			cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1015 		}
1016 
1017 		if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1018 			memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1019 			clear_bit(CONNECTED, &vif->flags);
1020 		}
1021 		return;
1022 	}
1023 
1024 	ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1025 					 assoc_resp_len, assoc_info,
1026 					 prot_reason_status);
1027 
1028 	aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1029 
1030 	del_timer(&vif->disconnect_timer);
1031 
1032 	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1033 
1034 	/*
1035 	 * If the event is due to disconnect cmd from the host, only they
1036 	 * the target would stop trying to connect. Under any other
1037 	 * condition, target would keep trying to connect.
1038 	 */
1039 	if (reason == DISCONNECT_CMD) {
1040 		if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1041 			ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1042 						 NONE_BSS_FILTER, 0);
1043 	} else {
1044 		set_bit(CONNECT_PEND, &vif->flags);
1045 		if (((reason == ASSOC_FAILED) &&
1046 		     (prot_reason_status == 0x11)) ||
1047 		    ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1048 		     (vif->reconnect_flag == 1))) {
1049 			set_bit(CONNECTED, &vif->flags);
1050 			return;
1051 		}
1052 	}
1053 
1054 	/* restart disconnected concurrent vifs waiting for new channel */
1055 	ath6kl_check_ch_switch(ar, ar->last_ch);
1056 
1057 	/* update connect & link status atomically */
1058 	spin_lock_bh(&vif->if_lock);
1059 	clear_bit(CONNECTED, &vif->flags);
1060 	netif_carrier_off(vif->ndev);
1061 	spin_unlock_bh(&vif->if_lock);
1062 
1063 	if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1064 		vif->reconnect_flag = 0;
1065 
1066 	if (reason != CSERV_DISCONNECT)
1067 		ar->user_key_ctrl = 0;
1068 
1069 	netif_stop_queue(vif->ndev);
1070 	memset(vif->bssid, 0, sizeof(vif->bssid));
1071 	vif->bss_ch = 0;
1072 
1073 	ath6kl_tx_data_cleanup(ar);
1074 }
1075 
1076 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1077 {
1078 	struct ath6kl_vif *vif;
1079 
1080 	spin_lock_bh(&ar->list_lock);
1081 	if (list_empty(&ar->vif_list)) {
1082 		spin_unlock_bh(&ar->list_lock);
1083 		return NULL;
1084 	}
1085 
1086 	vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1087 
1088 	spin_unlock_bh(&ar->list_lock);
1089 
1090 	return vif;
1091 }
1092 
1093 static int ath6kl_open(struct net_device *dev)
1094 {
1095 	struct ath6kl_vif *vif = netdev_priv(dev);
1096 
1097 	set_bit(WLAN_ENABLED, &vif->flags);
1098 
1099 	if (test_bit(CONNECTED, &vif->flags)) {
1100 		netif_carrier_on(dev);
1101 		netif_wake_queue(dev);
1102 	} else {
1103 		netif_carrier_off(dev);
1104 	}
1105 
1106 	return 0;
1107 }
1108 
1109 static int ath6kl_close(struct net_device *dev)
1110 {
1111 	struct ath6kl_vif *vif = netdev_priv(dev);
1112 
1113 	netif_stop_queue(dev);
1114 
1115 	ath6kl_cfg80211_stop(vif);
1116 
1117 	clear_bit(WLAN_ENABLED, &vif->flags);
1118 
1119 	return 0;
1120 }
1121 
1122 static int ath6kl_set_features(struct net_device *dev,
1123 			       netdev_features_t features)
1124 {
1125 	struct ath6kl_vif *vif = netdev_priv(dev);
1126 	struct ath6kl *ar = vif->ar;
1127 	int err = 0;
1128 
1129 	if ((features & NETIF_F_RXCSUM) &&
1130 	    (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1131 		ar->rx_meta_ver = WMI_META_VERSION_2;
1132 		err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1133 							 vif->fw_vif_idx,
1134 							 ar->rx_meta_ver, 0, 0);
1135 		if (err) {
1136 			dev->features = features & ~NETIF_F_RXCSUM;
1137 			return err;
1138 		}
1139 	} else if (!(features & NETIF_F_RXCSUM) &&
1140 		   (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1141 		ar->rx_meta_ver = 0;
1142 		err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1143 							 vif->fw_vif_idx,
1144 							 ar->rx_meta_ver, 0, 0);
1145 		if (err) {
1146 			dev->features = features | NETIF_F_RXCSUM;
1147 			return err;
1148 		}
1149 	}
1150 
1151 	return err;
1152 }
1153 
1154 static void ath6kl_set_multicast_list(struct net_device *ndev)
1155 {
1156 	struct ath6kl_vif *vif = netdev_priv(ndev);
1157 	bool mc_all_on = false;
1158 	int mc_count = netdev_mc_count(ndev);
1159 	struct netdev_hw_addr *ha;
1160 	bool found;
1161 	struct ath6kl_mc_filter *mc_filter, *tmp;
1162 	struct list_head mc_filter_new;
1163 	int ret;
1164 
1165 	if (!test_bit(WMI_READY, &vif->ar->flag) ||
1166 	    !test_bit(WLAN_ENABLED, &vif->flags))
1167 		return;
1168 
1169 	/* Enable multicast-all filter. */
1170 	mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1171 		    !!(ndev->flags & IFF_ALLMULTI) ||
1172 		    !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1173 
1174 	if (mc_all_on)
1175 		set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1176 	else
1177 		clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1178 
1179 	if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1180 		     vif->ar->fw_capabilities)) {
1181 		mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1182 	}
1183 
1184 	if (!(ndev->flags & IFF_MULTICAST)) {
1185 		mc_all_on = false;
1186 		set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1187 	} else {
1188 		clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1189 	}
1190 
1191 	/* Enable/disable "multicast-all" filter*/
1192 	ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1193 		   mc_all_on ? "enabling" : "disabling");
1194 
1195 	ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1196 						  mc_all_on);
1197 	if (ret) {
1198 		ath6kl_warn("Failed to %s multicast-all receive\n",
1199 			    mc_all_on ? "enable" : "disable");
1200 		return;
1201 	}
1202 
1203 	if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1204 		return;
1205 
1206 	/* Keep the driver and firmware mcast list in sync. */
1207 	list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1208 		found = false;
1209 		netdev_for_each_mc_addr(ha, ndev) {
1210 			if (memcmp(ha->addr, mc_filter->hw_addr,
1211 				   ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1212 				found = true;
1213 				break;
1214 			}
1215 		}
1216 
1217 		if (!found) {
1218 			/*
1219 			 * Delete the filter which was previously set
1220 			 * but not in the new request.
1221 			 */
1222 			ath6kl_dbg(ATH6KL_DBG_TRC,
1223 				   "Removing %pM from multicast filter\n",
1224 				   mc_filter->hw_addr);
1225 			ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1226 					vif->fw_vif_idx, mc_filter->hw_addr,
1227 					false);
1228 			if (ret) {
1229 				ath6kl_warn("Failed to remove multicast filter:%pM\n",
1230 					    mc_filter->hw_addr);
1231 				return;
1232 			}
1233 
1234 			list_del(&mc_filter->list);
1235 			kfree(mc_filter);
1236 		}
1237 	}
1238 
1239 	INIT_LIST_HEAD(&mc_filter_new);
1240 
1241 	netdev_for_each_mc_addr(ha, ndev) {
1242 		found = false;
1243 		list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1244 			if (memcmp(ha->addr, mc_filter->hw_addr,
1245 				   ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1246 				found = true;
1247 				break;
1248 			}
1249 		}
1250 
1251 		if (!found) {
1252 			mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1253 					    GFP_ATOMIC);
1254 			if (!mc_filter) {
1255 				WARN_ON(1);
1256 				goto out;
1257 			}
1258 
1259 			memcpy(mc_filter->hw_addr, ha->addr,
1260 			       ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1261 			/* Set the multicast filter */
1262 			ath6kl_dbg(ATH6KL_DBG_TRC,
1263 				   "Adding %pM to multicast filter list\n",
1264 				   mc_filter->hw_addr);
1265 			ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1266 					vif->fw_vif_idx, mc_filter->hw_addr,
1267 					true);
1268 			if (ret) {
1269 				ath6kl_warn("Failed to add multicast filter :%pM\n",
1270 					    mc_filter->hw_addr);
1271 				kfree(mc_filter);
1272 				goto out;
1273 			}
1274 
1275 			list_add_tail(&mc_filter->list, &mc_filter_new);
1276 		}
1277 	}
1278 
1279 out:
1280 	list_splice_tail(&mc_filter_new, &vif->mc_filter);
1281 }
1282 
1283 static const struct net_device_ops ath6kl_netdev_ops = {
1284 	.ndo_open               = ath6kl_open,
1285 	.ndo_stop               = ath6kl_close,
1286 	.ndo_start_xmit         = ath6kl_data_tx,
1287 	.ndo_set_features       = ath6kl_set_features,
1288 	.ndo_set_rx_mode	= ath6kl_set_multicast_list,
1289 };
1290 
1291 void init_netdev(struct net_device *dev)
1292 {
1293 	struct ath6kl *ar = ath6kl_priv(dev);
1294 
1295 	dev->netdev_ops = &ath6kl_netdev_ops;
1296 	dev->needs_free_netdev = true;
1297 	dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1298 
1299 	dev->needed_headroom = ETH_HLEN;
1300 	dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1301 					sizeof(struct wmi_data_hdr) +
1302 					HTC_HDR_LENGTH +
1303 					WMI_MAX_TX_META_SZ +
1304 					ATH6KL_HTC_ALIGN_BYTES, 4);
1305 
1306 	if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1307 		      ar->fw_capabilities))
1308 		dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1309 
1310 	return;
1311 }
1312