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