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