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_op_start(struct ieee80211_hw * hw)102 int plfxlc_op_start(struct ieee80211_hw *hw)
103 {
104 plfxlc_hw_mac(hw)->chip.usb.initialized = 1;
105 return 0;
106 }
107
plfxlc_op_stop(struct ieee80211_hw * hw,bool suspend)108 void 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
plfxlc_restore_settings(struct plfxlc_mac * mac)115 int 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
plfxlc_mac_tx_status(struct ieee80211_hw * hw,struct sk_buff * skb,int ackssi,struct tx_status * tx_status)149 static 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
plfxlc_mac_tx_to_dev(struct sk_buff * skb,int error)170 void 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
plfxlc_fill_ctrlset(struct plfxlc_mac * mac,struct sk_buff * skb)198 static 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
plfxlc_op_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)278 static 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
334 fail:
335 dev_kfree_skb(skb);
336 }
337
plfxlc_filter_ack(struct ieee80211_hw * hw,struct ieee80211_hdr * rx_hdr,struct ieee80211_rx_status * stats)338 static 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
plfxlc_mac_rx(struct ieee80211_hw * hw,const u8 * buffer,unsigned int length)393 int 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
plfxlc_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)496 static 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
plfxlc_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)520 static 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
plfxlc_op_config(struct ieee80211_hw * hw,int radio_idx,u32 changed)529 static 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)
plfxlc_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * new_flags,u64 multicast)537 static 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
plfxlc_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changes)580 static 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 }
627 exit_all:
628 spin_lock_irq(&mac->lock);
629 mac->associated = associated;
630 spin_unlock_irq(&mac->lock);
631 }
632
plfxlc_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)633 static 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
643 static const char et_strings[][ETH_GSTRING_LEN] = {
644 "phy_rssi",
645 "phy_rx_crc_err"
646 };
647
plfxlc_get_et_sset_count(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int sset)648 static 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
plfxlc_get_et_strings(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 sset,u8 * data)657 static 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
plfxlc_get_et_stats(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ethtool_stats * stats,u64 * data)665 static 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
plfxlc_set_rts_threshold(struct ieee80211_hw * hw,int radio_idx,u32 value)675 static int plfxlc_set_rts_threshold(struct ieee80211_hw *hw, int radio_idx,
676 u32 value)
677 {
678 return 0;
679 }
680
681 static 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
plfxlc_mac_alloc_hw(struct usb_interface * intf)702 struct 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
plfxlc_mac_release_hw(struct ieee80211_hw * hw)755 void plfxlc_mac_release_hw(struct ieee80211_hw *hw)
756 {
757 plfxlc_chip_release(&plfxlc_hw_mac(hw)->chip);
758 ieee80211_free_hw(hw);
759 }
760