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