mac.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (c) 2021 pureLiFi
  4 */
  5
  6#include <linux/netdevice.h>
  7#include <linux/etherdevice.h>
  8#include <linux/slab.h>
  9#include <linux/usb.h>
 10#include <linux/jiffies.h>
 11#include <net/ieee80211_radiotap.h>
 12
 13#include "chip.h"
 14#include "mac.h"
 15#include "usb.h"
 16
 17static const struct ieee80211_rate plfxlc_rates[] = {
 18	{ .bitrate = 10,
 19		.hw_value = PURELIFI_CCK_RATE_1M,
 20		.flags = 0 },
 21	{ .bitrate = 20,
 22		.hw_value = PURELIFI_CCK_RATE_2M,
 23		.hw_value_short = PURELIFI_CCK_RATE_2M
 24			| PURELIFI_CCK_PREA_SHORT,
 25		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
 26	{ .bitrate = 55,
 27		.hw_value = PURELIFI_CCK_RATE_5_5M,
 28		.hw_value_short = PURELIFI_CCK_RATE_5_5M
 29			| PURELIFI_CCK_PREA_SHORT,
 30		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
 31	{ .bitrate = 110,
 32		.hw_value = PURELIFI_CCK_RATE_11M,
 33		.hw_value_short = PURELIFI_CCK_RATE_11M
 34			| PURELIFI_CCK_PREA_SHORT,
 35		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
 36	{ .bitrate = 60,
 37		.hw_value = PURELIFI_OFDM_RATE_6M,
 38		.flags = 0 },
 39	{ .bitrate = 90,
 40		.hw_value = PURELIFI_OFDM_RATE_9M,
 41		.flags = 0 },
 42	{ .bitrate = 120,
 43		.hw_value = PURELIFI_OFDM_RATE_12M,
 44		.flags = 0 },
 45	{ .bitrate = 180,
 46		.hw_value = PURELIFI_OFDM_RATE_18M,
 47		.flags = 0 },
 48	{ .bitrate = 240,
 49		.hw_value = PURELIFI_OFDM_RATE_24M,
 50		.flags = 0 },
 51	{ .bitrate = 360,
 52		.hw_value = PURELIFI_OFDM_RATE_36M,
 53		.flags = 0 },
 54	{ .bitrate = 480,
 55		.hw_value = PURELIFI_OFDM_RATE_48M,
 56		.flags = 0 },
 57	{ .bitrate = 540,
 58		.hw_value = PURELIFI_OFDM_RATE_54M,
 59		.flags = 0 }
 60};
 61
 62static const struct ieee80211_channel plfxlc_channels[] = {
 63	{ .center_freq = 2412, .hw_value = 1 },
 64	{ .center_freq = 2417, .hw_value = 2 },
 65	{ .center_freq = 2422, .hw_value = 3 },
 66	{ .center_freq = 2427, .hw_value = 4 },
 67	{ .center_freq = 2432, .hw_value = 5 },
 68	{ .center_freq = 2437, .hw_value = 6 },
 69	{ .center_freq = 2442, .hw_value = 7 },
 70	{ .center_freq = 2447, .hw_value = 8 },
 71	{ .center_freq = 2452, .hw_value = 9 },
 72	{ .center_freq = 2457, .hw_value = 10 },
 73	{ .center_freq = 2462, .hw_value = 11 },
 74	{ .center_freq = 2467, .hw_value = 12 },
 75	{ .center_freq = 2472, .hw_value = 13 },
 76	{ .center_freq = 2484, .hw_value = 14 },
 77};
 78
 79int plfxlc_mac_preinit_hw(struct ieee80211_hw *hw, const u8 *hw_address)
 80{
 81	SET_IEEE80211_PERM_ADDR(hw, hw_address);
 82	return 0;
 83}
 84
 85int plfxlc_mac_init_hw(struct ieee80211_hw *hw)
 86{
 87	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
 88	struct plfxlc_chip *chip = &mac->chip;
 89	int r;
 90
 91	r = plfxlc_chip_init_hw(chip);
 92	if (r) {
 93		dev_warn(plfxlc_mac_dev(mac), "init hw failed (%d)\n", r);
 94		return r;
 95	}
 96
 97	dev_dbg(plfxlc_mac_dev(mac), "irq_disabled (%d)\n", irqs_disabled());
 98	regulatory_hint(hw->wiphy, "00");
 99	return r;
100}
101
102int plfxlc_op_start(struct ieee80211_hw *hw)
103{
104	plfxlc_hw_mac(hw)->chip.usb.initialized = 1;
105	return 0;
106}
107
108void plfxlc_op_stop(struct ieee80211_hw *hw, bool suspend)
109{
110	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
111
112	clear_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
113}
114
115int plfxlc_restore_settings(struct plfxlc_mac *mac)
116{
117	int beacon_interval, beacon_period;
118	struct sk_buff *beacon;
119
120	spin_lock_irq(&mac->lock);
121	beacon_interval = mac->beacon.interval;
122	beacon_period = mac->beacon.period;
123	spin_unlock_irq(&mac->lock);
124
125	if (mac->type != NL80211_IFTYPE_ADHOC)
126		return 0;
127
128	if (mac->vif) {
129		beacon = ieee80211_beacon_get(mac->hw, mac->vif, 0);
130		if (beacon) {
131			/*beacon is hardcoded in firmware */
132			kfree_skb(beacon);
133			/* Returned skb is used only once and lowlevel
134			 * driver is responsible for freeing it.
135			 */
136		}
137	}
138
139	plfxlc_set_beacon_interval(&mac->chip, beacon_interval,
140				   beacon_period, mac->type);
141
142	spin_lock_irq(&mac->lock);
143	mac->beacon.last_update = jiffies;
144	spin_unlock_irq(&mac->lock);
145
146	return 0;
147}
148
149static void plfxlc_mac_tx_status(struct ieee80211_hw *hw,
150				 struct sk_buff *skb,
151				 int ackssi,
152				 struct tx_status *tx_status)
153{
154	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
155	int success = 1;
156
157	ieee80211_tx_info_clear_status(info);
158	if (tx_status)
159		success = !tx_status->failure;
160
161	if (success)
162		info->flags |= IEEE80211_TX_STAT_ACK;
163	else
164		info->flags &= ~IEEE80211_TX_STAT_ACK;
165
166	info->status.ack_signal = 50;
167	ieee80211_tx_status_irqsafe(hw, skb);
168}
169
170void plfxlc_mac_tx_to_dev(struct sk_buff *skb, int error)
171{
172	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
173	struct ieee80211_hw *hw = info->rate_driver_data[0];
174	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
175	struct sk_buff_head *q = NULL;
176
177	ieee80211_tx_info_clear_status(info);
178	skb_pull(skb, sizeof(struct plfxlc_ctrlset));
179
180	if (unlikely(error ||
181		     (info->flags & IEEE80211_TX_CTL_NO_ACK))) {
182		ieee80211_tx_status_irqsafe(hw, skb);
183		return;
184	}
185
186	q = &mac->ack_wait_queue;
187
188	skb_queue_tail(q, skb);
189	while (skb_queue_len(q)/* > PURELIFI_MAC_MAX_ACK_WAITERS*/) {
190		plfxlc_mac_tx_status(hw, skb_dequeue(q),
191				     mac->ack_pending ?
192				     mac->ack_signal : 0,
193				     NULL);
194		mac->ack_pending = 0;
195	}
196}
197
198static int plfxlc_fill_ctrlset(struct plfxlc_mac *mac, struct sk_buff *skb)
199{
200	unsigned int frag_len = skb->len;
201	struct plfxlc_ctrlset *cs;
202	u32 temp_payload_len = 0;
203	unsigned int tmp;
204	u32 temp_len = 0;
205
206	if (skb_headroom(skb) < sizeof(struct plfxlc_ctrlset)) {
207		dev_dbg(plfxlc_mac_dev(mac), "Not enough hroom(1)\n");
208		return 1;
209	}
210
211	cs = (void *)skb_push(skb, sizeof(struct plfxlc_ctrlset));
212	temp_payload_len = frag_len;
213	temp_len = temp_payload_len +
214		  sizeof(struct plfxlc_ctrlset) -
215		  sizeof(cs->id) - sizeof(cs->len);
216
217	/* Data packet lengths must be multiple of four bytes and must
218	 * not be a multiple of 512 bytes. First, it is attempted to
219	 * append the data packet in the tailroom of the skb. In rare
220	 * occasions, the tailroom is too small. In this case, the
221	 * content of the packet is shifted into the headroom of the skb
222	 * by memcpy. Headroom is allocated at startup (below in this
223	 * file). Therefore, there will be always enough headroom. The
224	 * call skb_headroom is an additional safety which might be
225	 * dropped.
226	 */
227	/* check if 32 bit aligned and align data */
228	tmp = skb->len & 3;
229	if (tmp) {
230		if (skb_tailroom(skb) < (3 - tmp)) {
231			if (skb_headroom(skb) >= 4 - tmp) {
232				u8 len;
233				u8 *src_pt;
234				u8 *dest_pt;
235
236				len = skb->len;
237				src_pt = skb->data;
238				dest_pt = skb_push(skb, 4 - tmp);
239				memmove(dest_pt, src_pt, len);
240			} else {
241				return -ENOBUFS;
242			}
243		} else {
244			skb_put(skb, 4 - tmp);
245		}
246		temp_len += 4 - tmp;
247	}
248
249	/* check if not multiple of 512 and align data */
250	tmp = skb->len & 0x1ff;
251	if (!tmp) {
252		if (skb_tailroom(skb) < 4) {
253			if (skb_headroom(skb) >= 4) {
254				u8 len = skb->len;
255				u8 *src_pt = skb->data;
256				u8 *dest_pt = skb_push(skb, 4);
257
258				memmove(dest_pt, src_pt, len);
259			} else {
260				/* should never happen because
261				 * sufficient headroom was reserved
262				 */
263				return -ENOBUFS;
264			}
265		} else {
266			skb_put(skb, 4);
267		}
268		temp_len += 4;
269	}
270
271	cs->id = cpu_to_be32(USB_REQ_DATA_TX);
272	cs->len = cpu_to_be32(temp_len);
273	cs->payload_len_nw = cpu_to_be32(temp_payload_len);
274
275	return 0;
276}
277
278static void plfxlc_op_tx(struct ieee80211_hw *hw,
279			 struct ieee80211_tx_control *control,
280			 struct sk_buff *skb)
281{
282	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
283	struct plfxlc_header *plhdr = (void *)skb->data;
284	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
285	struct plfxlc_usb *usb = &mac->chip.usb;
286	unsigned long flags;
287	int r;
288
289	r = plfxlc_fill_ctrlset(mac, skb);
290	if (r)
291		goto fail;
292
293	info->rate_driver_data[0] = hw;
294
295	if (plhdr->frametype  == IEEE80211_FTYPE_DATA) {
296		u8 *dst_mac = plhdr->dmac;
297		u8 sidx;
298		bool found = false;
299		struct plfxlc_usb_tx *tx = &usb->tx;
300
301		for (sidx = 0; sidx < MAX_STA_NUM; sidx++) {
302			if (!(tx->station[sidx].flag & STATION_CONNECTED_FLAG))
303				continue;
304			if (memcmp(tx->station[sidx].mac, dst_mac, ETH_ALEN))
305				continue;
306			found = true;
307			break;
308		}
309
310		/* Default to broadcast address for unknown MACs */
311		if (!found)
312			sidx = STA_BROADCAST_INDEX;
313
314		/* Stop OS from sending packets, if the queue is half full */
315		if (skb_queue_len(&tx->station[sidx].data_list) > 60)
316			ieee80211_stop_queues(plfxlc_usb_to_hw(usb));
317
318		/* Schedule packet for transmission if queue is not full */
319		if (skb_queue_len(&tx->station[sidx].data_list) > 256)
320			goto fail;
321		skb_queue_tail(&tx->station[sidx].data_list, skb);
322		plfxlc_send_packet_from_data_queue(usb);
323
324	} else {
325		spin_lock_irqsave(&usb->tx.lock, flags);
326		r = plfxlc_usb_wreq_async(&mac->chip.usb, skb->data, skb->len,
327					  USB_REQ_DATA_TX, plfxlc_tx_urb_complete, skb);
328		spin_unlock_irqrestore(&usb->tx.lock, flags);
329		if (r)
330			goto fail;
331	}
332	return;
333
334fail:
335	dev_kfree_skb(skb);
336}
337
338static int plfxlc_filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
339			     struct ieee80211_rx_status *stats)
340{
341	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
342	struct sk_buff_head *q;
343	int i, position = 0;
344	unsigned long flags;
345	struct sk_buff *skb;
346	bool found = false;
347
348	if (!ieee80211_is_ack(rx_hdr->frame_control))
349		return 0;
350
351	dev_dbg(plfxlc_mac_dev(mac), "ACK Received\n");
352
353	/* code based on zy driver, this logic may need fix */
354	q = &mac->ack_wait_queue;
355	spin_lock_irqsave(&q->lock, flags);
356
357	skb_queue_walk(q, skb) {
358		struct ieee80211_hdr *tx_hdr;
359
360		position++;
361
362		if (mac->ack_pending && skb_queue_is_first(q, skb))
363			continue;
364		if (mac->ack_pending == 0)
365			break;
366
367		tx_hdr = (struct ieee80211_hdr *)skb->data;
368		if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1))) {
369			found = 1;
370			break;
371		}
372	}
373
374	if (found) {
375		for (i = 1; i < position; i++)
376			skb = __skb_dequeue(q);
377		if (i == position) {
378			plfxlc_mac_tx_status(hw, skb,
379					     mac->ack_pending ?
380					     mac->ack_signal : 0,
381					     NULL);
382			mac->ack_pending = 0;
383		}
384
385		mac->ack_pending = skb_queue_len(q) ? 1 : 0;
386		mac->ack_signal = stats->signal;
387	}
388
389	spin_unlock_irqrestore(&q->lock, flags);
390	return 1;
391}
392
393int plfxlc_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
394		  unsigned int length)
395{
396	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
397	struct ieee80211_rx_status stats;
398	const struct rx_status *status;
399	unsigned int payload_length;
400	struct plfxlc_usb_tx *tx;
401	struct sk_buff *skb;
402	int need_padding;
403	__le16 fc;
404	int sidx;
405
406	/* Packet blockade during disabled interface. */
407	if (!mac->vif)
408		return 0;
409
410	status = (struct rx_status *)buffer;
411
412	memset(&stats, 0, sizeof(stats));
413
414	stats.flag     = 0;
415	stats.freq     = 2412;
416	stats.band     = NL80211_BAND_LC;
417	mac->rssi      = -15 * be16_to_cpu(status->rssi) / 10;
418
419	stats.signal   = mac->rssi;
420
421	if (status->rate_idx > 7)
422		stats.rate_idx = 0;
423	else
424		stats.rate_idx = status->rate_idx;
425
426	mac->crc_errors = be64_to_cpu(status->crc_error_count);
427
428	/* TODO bad frame check for CRC error*/
429	if (plfxlc_filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) &&
430	    !mac->pass_ctrl)
431		return 0;
432
433	buffer += sizeof(struct rx_status);
434	payload_length = get_unaligned_be32(buffer);
435
436	if (payload_length > 1560) {
437		dev_err(plfxlc_mac_dev(mac), " > MTU %u\n", payload_length);
438		return 0;
439	}
440	buffer += sizeof(u32);
441
442	fc = get_unaligned((__le16 *)buffer);
443	need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc);
444
445	tx = &mac->chip.usb.tx;
446
447	for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
448		if (memcmp(&buffer[10], tx->station[sidx].mac, ETH_ALEN))
449			continue;
450		if (tx->station[sidx].flag & STATION_CONNECTED_FLAG) {
451			tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG;
452			break;
453		}
454	}
455
456	if (sidx == MAX_STA_NUM - 1) {
457		for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
458			if (tx->station[sidx].flag & STATION_CONNECTED_FLAG)
459				continue;
460			memcpy(tx->station[sidx].mac, &buffer[10], ETH_ALEN);
461			tx->station[sidx].flag |= STATION_CONNECTED_FLAG;
462			tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG;
463			break;
464		}
465	}
466
467	switch (buffer[0]) {
468	case IEEE80211_STYPE_PROBE_REQ:
469		dev_dbg(plfxlc_mac_dev(mac), "Probe request\n");
470		break;
471	case IEEE80211_STYPE_ASSOC_REQ:
472		dev_dbg(plfxlc_mac_dev(mac), "Association request\n");
473		break;
474	case IEEE80211_STYPE_AUTH:
475		dev_dbg(plfxlc_mac_dev(mac), "Authentication req\n");
476		break;
477	case IEEE80211_FTYPE_DATA:
478		dev_dbg(plfxlc_mac_dev(mac), "802.11 data frame\n");
479		break;
480	}
481
482	skb = dev_alloc_skb(payload_length + (need_padding ? 2 : 0));
483	if (!skb)
484		return -ENOMEM;
485
486	if (need_padding)
487		/* Make sure that the payload data is 4 byte aligned. */
488		skb_reserve(skb, 2);
489
490	skb_put_data(skb, buffer, payload_length);
491	memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
492	ieee80211_rx_irqsafe(hw, skb);
493	return 0;
494}
495
496static int plfxlc_op_add_interface(struct ieee80211_hw *hw,
497				   struct ieee80211_vif *vif)
498{
499	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
500	static const char * const iftype80211[] = {
501		[NL80211_IFTYPE_STATION]	= "Station",
502		[NL80211_IFTYPE_ADHOC]		= "Adhoc"
503	};
504
505	if (mac->type != NL80211_IFTYPE_UNSPECIFIED)
506		return -EOPNOTSUPP;
507
508	if (vif->type == NL80211_IFTYPE_ADHOC ||
509	    vif->type == NL80211_IFTYPE_STATION) {
510		dev_dbg(plfxlc_mac_dev(mac), "%s %s\n", __func__,
511			iftype80211[vif->type]);
512		mac->type = vif->type;
513		mac->vif = vif;
514		return 0;
515	}
516	dev_dbg(plfxlc_mac_dev(mac), "unsupported iftype\n");
517	return -EOPNOTSUPP;
518}
519
520static void plfxlc_op_remove_interface(struct ieee80211_hw *hw,
521				       struct ieee80211_vif *vif)
522{
523	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
524
525	mac->type = NL80211_IFTYPE_UNSPECIFIED;
526	mac->vif = NULL;
527}
528
529static int plfxlc_op_config(struct ieee80211_hw *hw, int radio_idx, u32 changed)
530{
531	return 0;
532}
533
534#define SUPPORTED_FIF_FLAGS \
535	(FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
536	 FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)
537static void plfxlc_op_configure_filter(struct ieee80211_hw *hw,
538				       unsigned int changed_flags,
539				       unsigned int *new_flags,
540				       u64 multicast)
541{
542	struct plfxlc_mc_hash hash = {
543		.low = multicast,
544		.high = multicast >> 32,
545	};
546	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
547	unsigned long flags;
548
549	/* Only deal with supported flags */
550	*new_flags &= SUPPORTED_FIF_FLAGS;
551
552	/* If multicast parameter
553	 * (as returned by plfxlc_op_prepare_multicast)
554	 * has changed, no bit in changed_flags is set. To handle this
555	 * situation, we do not return if changed_flags is 0. If we do so,
556	 * we will have some issue with IPv6 which uses multicast for link
557	 * layer address resolution.
558	 */
559	if (*new_flags & (FIF_ALLMULTI))
560		plfxlc_mc_add_all(&hash);
561
562	spin_lock_irqsave(&mac->lock, flags);
563	mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL);
564	mac->pass_ctrl = !!(*new_flags & FIF_CONTROL);
565	mac->multicast_hash = hash;
566	spin_unlock_irqrestore(&mac->lock, flags);
567
568	/* no handling required for FIF_OTHER_BSS as we don't currently
569	 * do BSSID filtering
570	 */
571	/* FIXME: in future it would be nice to enable the probe response
572	 * filter (so that the driver doesn't see them) until
573	 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd
574	 * have to schedule work to enable prbresp reception, which might
575	 * happen too late. For now we'll just listen and forward them all the
576	 * time.
577	 */
578}
579
580static void plfxlc_op_bss_info_changed(struct ieee80211_hw *hw,
581				       struct ieee80211_vif *vif,
582				       struct ieee80211_bss_conf *bss_conf,
583				       u64 changes)
584{
585	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
586	int associated;
587
588	dev_dbg(plfxlc_mac_dev(mac), "changes: %llx\n", changes);
589
590	if (mac->type != NL80211_IFTYPE_ADHOC) { /* for STATION */
591		associated = is_valid_ether_addr(bss_conf->bssid);
592		goto exit_all;
593	}
594	/* for ADHOC */
595	associated = true;
596	if (changes & BSS_CHANGED_BEACON) {
597		struct sk_buff *beacon = ieee80211_beacon_get(hw, vif, 0);
598
599		if (beacon) {
600			/*beacon is hardcoded in firmware */
601			kfree_skb(beacon);
602			/*Returned skb is used only once and
603			 * low-level driver is
604			 * responsible for freeing it.
605			 */
606		}
607	}
608
609	if (changes & BSS_CHANGED_BEACON_ENABLED) {
610		u16 interval = 0;
611		u8 period = 0;
612
613		if (bss_conf->enable_beacon) {
614			period = bss_conf->dtim_period;
615			interval = bss_conf->beacon_int;
616		}
617
618		spin_lock_irq(&mac->lock);
619		mac->beacon.period = period;
620		mac->beacon.interval = interval;
621		mac->beacon.last_update = jiffies;
622		spin_unlock_irq(&mac->lock);
623
624		plfxlc_set_beacon_interval(&mac->chip, interval,
625					   period, mac->type);
626	}
627exit_all:
628	spin_lock_irq(&mac->lock);
629	mac->associated = associated;
630	spin_unlock_irq(&mac->lock);
631}
632
633static int plfxlc_get_stats(struct ieee80211_hw *hw,
634			    struct ieee80211_low_level_stats *stats)
635{
636	stats->dot11ACKFailureCount = 0;
637	stats->dot11RTSFailureCount = 0;
638	stats->dot11FCSErrorCount   = 0;
639	stats->dot11RTSSuccessCount = 0;
640	return 0;
641}
642
643static const char et_strings[][ETH_GSTRING_LEN] = {
644	"phy_rssi",
645	"phy_rx_crc_err"
646};
647
648static int plfxlc_get_et_sset_count(struct ieee80211_hw *hw,
649				    struct ieee80211_vif *vif, int sset)
650{
651	if (sset == ETH_SS_STATS)
652		return ARRAY_SIZE(et_strings);
653
654	return 0;
655}
656
657static void plfxlc_get_et_strings(struct ieee80211_hw *hw,
658				  struct ieee80211_vif *vif,
659				  u32 sset, u8 *data)
660{
661	if (sset == ETH_SS_STATS)
662		memcpy(data, et_strings, sizeof(et_strings));
663}
664
665static void plfxlc_get_et_stats(struct ieee80211_hw *hw,
666				struct ieee80211_vif *vif,
667				struct ethtool_stats *stats, u64 *data)
668{
669	struct plfxlc_mac *mac = plfxlc_hw_mac(hw);
670
671	data[0] = mac->rssi;
672	data[1] = mac->crc_errors;
673}
674
675static int plfxlc_set_rts_threshold(struct ieee80211_hw *hw, int radio_idx,
676				    u32 value)
677{
678	return 0;
679}
680
681static const struct ieee80211_ops plfxlc_ops = {
682	.add_chanctx = ieee80211_emulate_add_chanctx,
683	.remove_chanctx = ieee80211_emulate_remove_chanctx,
684	.change_chanctx = ieee80211_emulate_change_chanctx,
685	.switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
686	.tx = plfxlc_op_tx,
687	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
688	.start = plfxlc_op_start,
689	.stop = plfxlc_op_stop,
690	.add_interface = plfxlc_op_add_interface,
691	.remove_interface = plfxlc_op_remove_interface,
692	.set_rts_threshold = plfxlc_set_rts_threshold,
693	.config = plfxlc_op_config,
694	.configure_filter = plfxlc_op_configure_filter,
695	.bss_info_changed = plfxlc_op_bss_info_changed,
696	.get_stats = plfxlc_get_stats,
697	.get_et_sset_count = plfxlc_get_et_sset_count,
698	.get_et_stats = plfxlc_get_et_stats,
699	.get_et_strings = plfxlc_get_et_strings,
700};
701
702struct ieee80211_hw *plfxlc_mac_alloc_hw(struct usb_interface *intf)
703{
704	struct ieee80211_hw *hw;
705	struct plfxlc_mac *mac;
706
707	hw = ieee80211_alloc_hw(sizeof(struct plfxlc_mac), &plfxlc_ops);
708	if (!hw) {
709		dev_dbg(&intf->dev, "out of memory\n");
710		return NULL;
711	}
712	set_wiphy_dev(hw->wiphy, &intf->dev);
713
714	mac = plfxlc_hw_mac(hw);
715	memset(mac, 0, sizeof(*mac));
716	spin_lock_init(&mac->lock);
717	mac->hw = hw;
718
719	mac->type = NL80211_IFTYPE_UNSPECIFIED;
720
721	memcpy(mac->channels, plfxlc_channels, sizeof(plfxlc_channels));
722	memcpy(mac->rates, plfxlc_rates, sizeof(plfxlc_rates));
723	mac->band.n_bitrates = ARRAY_SIZE(plfxlc_rates);
724	mac->band.bitrates = mac->rates;
725	mac->band.n_channels = ARRAY_SIZE(plfxlc_channels);
726	mac->band.channels = mac->channels;
727	hw->wiphy->bands[NL80211_BAND_LC] = &mac->band;
728	hw->conf.chandef.width = NL80211_CHAN_WIDTH_20;
729
730	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
731	ieee80211_hw_set(hw, SIGNAL_DBM);
732	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
733	ieee80211_hw_set(hw, MFP_CAPABLE);
734
735	hw->wiphy->interface_modes =
736		BIT(NL80211_IFTYPE_STATION) |
737		BIT(NL80211_IFTYPE_ADHOC);
738	hw->max_signal = 100;
739	hw->queues = 1;
740	/* 4 for 32 bit alignment if no tailroom */
741	hw->extra_tx_headroom = sizeof(struct plfxlc_ctrlset) + 4;
742	/* Tell mac80211 that we support multi rate retries */
743	hw->max_rates = IEEE80211_TX_MAX_RATES;
744	hw->max_rate_tries = 18;   /* 9 rates * 2 retries/rate */
745
746	skb_queue_head_init(&mac->ack_wait_queue);
747	mac->ack_pending = 0;
748
749	plfxlc_chip_init(&mac->chip, hw, intf);
750
751	SET_IEEE80211_DEV(hw, &intf->dev);
752	return hw;
753}
754
755void plfxlc_mac_release_hw(struct ieee80211_hw *hw)
756{
757	plfxlc_chip_release(&plfxlc_hw_mac(hw)->chip);
758	ieee80211_free_hw(hw);
759}