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1/**
2 * Copyright (c) 2014 Redpine Signals Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/etherdevice.h>
18#include "rsi_debugfs.h"
19#include "rsi_mgmt.h"
20#include "rsi_common.h"
21
22static const struct ieee80211_channel rsi_2ghz_channels[] = {
23 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2412,
24 .hw_value = 1 }, /* Channel 1 */
25 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417,
26 .hw_value = 2 }, /* Channel 2 */
27 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422,
28 .hw_value = 3 }, /* Channel 3 */
29 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427,
30 .hw_value = 4 }, /* Channel 4 */
31 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432,
32 .hw_value = 5 }, /* Channel 5 */
33 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437,
34 .hw_value = 6 }, /* Channel 6 */
35 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442,
36 .hw_value = 7 }, /* Channel 7 */
37 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447,
38 .hw_value = 8 }, /* Channel 8 */
39 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452,
40 .hw_value = 9 }, /* Channel 9 */
41 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457,
42 .hw_value = 10 }, /* Channel 10 */
43 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462,
44 .hw_value = 11 }, /* Channel 11 */
45 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467,
46 .hw_value = 12 }, /* Channel 12 */
47 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472,
48 .hw_value = 13 }, /* Channel 13 */
49 { .band = IEEE80211_BAND_2GHZ, .center_freq = 2484,
50 .hw_value = 14 }, /* Channel 14 */
51};
52
53static const struct ieee80211_channel rsi_5ghz_channels[] = {
54 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5180,
55 .hw_value = 36, }, /* Channel 36 */
56 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200,
57 .hw_value = 40, }, /* Channel 40 */
58 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220,
59 .hw_value = 44, }, /* Channel 44 */
60 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240,
61 .hw_value = 48, }, /* Channel 48 */
62 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5260,
63 .hw_value = 52, }, /* Channel 52 */
64 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5280,
65 .hw_value = 56, }, /* Channel 56 */
66 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5300,
67 .hw_value = 60, }, /* Channel 60 */
68 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5320,
69 .hw_value = 64, }, /* Channel 64 */
70 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5500,
71 .hw_value = 100, }, /* Channel 100 */
72 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5520,
73 .hw_value = 104, }, /* Channel 104 */
74 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5540,
75 .hw_value = 108, }, /* Channel 108 */
76 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5560,
77 .hw_value = 112, }, /* Channel 112 */
78 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5580,
79 .hw_value = 116, }, /* Channel 116 */
80 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5600,
81 .hw_value = 120, }, /* Channel 120 */
82 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5620,
83 .hw_value = 124, }, /* Channel 124 */
84 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5640,
85 .hw_value = 128, }, /* Channel 128 */
86 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5660,
87 .hw_value = 132, }, /* Channel 132 */
88 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5680,
89 .hw_value = 136, }, /* Channel 136 */
90 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5700,
91 .hw_value = 140, }, /* Channel 140 */
92 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5745,
93 .hw_value = 149, }, /* Channel 149 */
94 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5765,
95 .hw_value = 153, }, /* Channel 153 */
96 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5785,
97 .hw_value = 157, }, /* Channel 157 */
98 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5805,
99 .hw_value = 161, }, /* Channel 161 */
100 { .band = IEEE80211_BAND_5GHZ, .center_freq = 5825,
101 .hw_value = 165, }, /* Channel 165 */
102};
103
104struct ieee80211_rate rsi_rates[12] = {
105 { .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 },
106 { .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 },
107 { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
108 { .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 },
109 { .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 },
110 { .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 },
111 { .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 },
112 { .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 },
113 { .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 },
114 { .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 },
115 { .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 },
116 { .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 },
117};
118
119const u16 rsi_mcsrates[8] = {
120 RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
121 RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
122};
123
124/**
125 * rsi_is_cipher_wep() - This function determines if the cipher is WEP or not.
126 * @common: Pointer to the driver private structure.
127 *
128 * Return: If cipher type is WEP, a value of 1 is returned, else 0.
129 */
130
131bool rsi_is_cipher_wep(struct rsi_common *common)
132{
133 if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
134 (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
135 (!common->secinfo.ptk_cipher))
136 return true;
137 else
138 return false;
139}
140
141/**
142 * rsi_register_rates_channels() - This function registers channels and rates.
143 * @adapter: Pointer to the adapter structure.
144 * @band: Operating band to be set.
145 *
146 * Return: None.
147 */
148static void rsi_register_rates_channels(struct rsi_hw *adapter, int band)
149{
150 struct ieee80211_supported_band *sbands = &adapter->sbands[band];
151 void *channels = NULL;
152
153 if (band == IEEE80211_BAND_2GHZ) {
154 channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL);
155 memcpy(channels,
156 rsi_2ghz_channels,
157 sizeof(rsi_2ghz_channels));
158 sbands->band = IEEE80211_BAND_2GHZ;
159 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
160 sbands->bitrates = rsi_rates;
161 sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
162 } else {
163 channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL);
164 memcpy(channels,
165 rsi_5ghz_channels,
166 sizeof(rsi_5ghz_channels));
167 sbands->band = IEEE80211_BAND_5GHZ;
168 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
169 sbands->bitrates = &rsi_rates[4];
170 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
171 }
172
173 sbands->channels = channels;
174
175 memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
176 sbands->ht_cap.ht_supported = true;
177 sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
178 IEEE80211_HT_CAP_SGI_20 |
179 IEEE80211_HT_CAP_SGI_40);
180 sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
181 sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
182 sbands->ht_cap.mcs.rx_mask[0] = 0xff;
183 sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
184 /* sbands->ht_cap.mcs.rx_highest = 0x82; */
185}
186
187/**
188 * rsi_mac80211_detach() - This function is used to de-initialize the
189 * Mac80211 stack.
190 * @adapter: Pointer to the adapter structure.
191 *
192 * Return: None.
193 */
194void rsi_mac80211_detach(struct rsi_hw *adapter)
195{
196 struct ieee80211_hw *hw = adapter->hw;
197
198 if (hw) {
199 ieee80211_stop_queues(hw);
200 ieee80211_unregister_hw(hw);
201 ieee80211_free_hw(hw);
202 }
203
204 rsi_remove_dbgfs(adapter);
205}
206EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
207
208/**
209 * rsi_indicate_tx_status() - This function indicates the transmit status.
210 * @adapter: Pointer to the adapter structure.
211 * @skb: Pointer to the socket buffer structure.
212 * @status: Status
213 *
214 * Return: None.
215 */
216void rsi_indicate_tx_status(struct rsi_hw *adapter,
217 struct sk_buff *skb,
218 int status)
219{
220 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
221
222 memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
223
224 if (!status)
225 info->flags |= IEEE80211_TX_STAT_ACK;
226
227 ieee80211_tx_status_irqsafe(adapter->hw, skb);
228}
229
230/**
231 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
232 * transmitted frame.SKB contains the buffer starting
233 * from the IEEE 802.11 header.
234 * @hw: Pointer to the ieee80211_hw structure.
235 * @control: Pointer to the ieee80211_tx_control structure
236 * @skb: Pointer to the socket buffer structure.
237 *
238 * Return: None
239 */
240static void rsi_mac80211_tx(struct ieee80211_hw *hw,
241 struct ieee80211_tx_control *control,
242 struct sk_buff *skb)
243{
244 struct rsi_hw *adapter = hw->priv;
245 struct rsi_common *common = adapter->priv;
246
247 rsi_core_xmit(common, skb);
248}
249
250/**
251 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
252 * the driver init is complete by then, just
253 * returns success.
254 * @hw: Pointer to the ieee80211_hw structure.
255 *
256 * Return: 0 as success.
257 */
258static int rsi_mac80211_start(struct ieee80211_hw *hw)
259{
260 struct rsi_hw *adapter = hw->priv;
261 struct rsi_common *common = adapter->priv;
262
263 mutex_lock(&common->mutex);
264 common->iface_down = false;
265 mutex_unlock(&common->mutex);
266
267 return 0;
268}
269
270/**
271 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
272 * @hw: Pointer to the ieee80211_hw structure.
273 *
274 * Return: None.
275 */
276static void rsi_mac80211_stop(struct ieee80211_hw *hw)
277{
278 struct rsi_hw *adapter = hw->priv;
279 struct rsi_common *common = adapter->priv;
280
281 mutex_lock(&common->mutex);
282 common->iface_down = true;
283 mutex_unlock(&common->mutex);
284}
285
286/**
287 * rsi_mac80211_add_interface() - This function is called when a netdevice
288 * attached to the hardware is enabled.
289 * @hw: Pointer to the ieee80211_hw structure.
290 * @vif: Pointer to the ieee80211_vif structure.
291 *
292 * Return: ret: 0 on success, negative error code on failure.
293 */
294static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
295 struct ieee80211_vif *vif)
296{
297 struct rsi_hw *adapter = hw->priv;
298 struct rsi_common *common = adapter->priv;
299 int ret = -EOPNOTSUPP;
300
301 mutex_lock(&common->mutex);
302 switch (vif->type) {
303 case NL80211_IFTYPE_STATION:
304 if (!adapter->sc_nvifs) {
305 ++adapter->sc_nvifs;
306 adapter->vifs[0] = vif;
307 ret = rsi_set_vap_capabilities(common, STA_OPMODE);
308 }
309 break;
310 default:
311 rsi_dbg(ERR_ZONE,
312 "%s: Interface type %d not supported\n", __func__,
313 vif->type);
314 }
315 mutex_unlock(&common->mutex);
316
317 return ret;
318}
319
320/**
321 * rsi_mac80211_remove_interface() - This function notifies driver that an
322 * interface is going down.
323 * @hw: Pointer to the ieee80211_hw structure.
324 * @vif: Pointer to the ieee80211_vif structure.
325 *
326 * Return: None.
327 */
328static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
329 struct ieee80211_vif *vif)
330{
331 struct rsi_hw *adapter = hw->priv;
332 struct rsi_common *common = adapter->priv;
333
334 mutex_lock(&common->mutex);
335 if (vif->type == NL80211_IFTYPE_STATION)
336 adapter->sc_nvifs--;
337
338 if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
339 adapter->vifs[0] = NULL;
340 mutex_unlock(&common->mutex);
341}
342
343/**
344 * rsi_channel_change() - This function is a performs the checks
345 * required for changing a channel and sets
346 * the channel accordingly.
347 * @hw: Pointer to the ieee80211_hw structure.
348 *
349 * Return: 0 on success, negative error code on failure.
350 */
351static int rsi_channel_change(struct ieee80211_hw *hw)
352{
353 struct rsi_hw *adapter = hw->priv;
354 struct rsi_common *common = adapter->priv;
355 int status = -EOPNOTSUPP;
356 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
357 u16 channel = curchan->hw_value;
358 struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
359
360 rsi_dbg(INFO_ZONE,
361 "%s: Set channel: %d MHz type: %d channel_no %d\n",
362 __func__, curchan->center_freq,
363 curchan->flags, channel);
364
365 if (bss->assoc) {
366 if (!common->hw_data_qs_blocked &&
367 (rsi_get_connected_channel(adapter) != channel)) {
368 rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
369 if (!rsi_send_block_unblock_frame(common, true))
370 common->hw_data_qs_blocked = true;
371 }
372 }
373
374 status = rsi_band_check(common);
375 if (!status)
376 status = rsi_set_channel(adapter->priv, channel);
377
378 if (bss->assoc) {
379 if (common->hw_data_qs_blocked &&
380 (rsi_get_connected_channel(adapter) == channel)) {
381 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
382 if (!rsi_send_block_unblock_frame(common, false))
383 common->hw_data_qs_blocked = false;
384 }
385 } else {
386 if (common->hw_data_qs_blocked) {
387 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
388 if (!rsi_send_block_unblock_frame(common, false))
389 common->hw_data_qs_blocked = false;
390 }
391 }
392
393 return status;
394}
395
396/**
397 * rsi_mac80211_config() - This function is a handler for configuration
398 * requests. The stack calls this function to
399 * change hardware configuration, e.g., channel.
400 * @hw: Pointer to the ieee80211_hw structure.
401 * @changed: Changed flags set.
402 *
403 * Return: 0 on success, negative error code on failure.
404 */
405static int rsi_mac80211_config(struct ieee80211_hw *hw,
406 u32 changed)
407{
408 struct rsi_hw *adapter = hw->priv;
409 struct rsi_common *common = adapter->priv;
410 int status = -EOPNOTSUPP;
411
412 mutex_lock(&common->mutex);
413
414 if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
415 status = rsi_channel_change(hw);
416
417 mutex_unlock(&common->mutex);
418
419 return status;
420}
421
422/**
423 * rsi_get_connected_channel() - This function is used to get the current
424 * connected channel number.
425 * @adapter: Pointer to the adapter structure.
426 *
427 * Return: Current connected AP's channel number is returned.
428 */
429u16 rsi_get_connected_channel(struct rsi_hw *adapter)
430{
431 struct ieee80211_vif *vif = adapter->vifs[0];
432 if (vif) {
433 struct ieee80211_bss_conf *bss = &vif->bss_conf;
434 struct ieee80211_channel *channel = bss->chandef.chan;
435 return channel->hw_value;
436 }
437
438 return 0;
439}
440
441/**
442 * rsi_mac80211_bss_info_changed() - This function is a handler for config
443 * requests related to BSS parameters that
444 * may vary during BSS's lifespan.
445 * @hw: Pointer to the ieee80211_hw structure.
446 * @vif: Pointer to the ieee80211_vif structure.
447 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
448 * @changed: Changed flags set.
449 *
450 * Return: None.
451 */
452static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
453 struct ieee80211_vif *vif,
454 struct ieee80211_bss_conf *bss_conf,
455 u32 changed)
456{
457 struct rsi_hw *adapter = hw->priv;
458 struct rsi_common *common = adapter->priv;
459
460 mutex_lock(&common->mutex);
461 if (changed & BSS_CHANGED_ASSOC) {
462 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
463 __func__, bss_conf->assoc);
464 rsi_inform_bss_status(common,
465 bss_conf->assoc,
466 bss_conf->bssid,
467 bss_conf->qos,
468 bss_conf->aid);
469 }
470
471 if (changed & BSS_CHANGED_CQM) {
472 common->cqm_info.last_cqm_event_rssi = 0;
473 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
474 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
475 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
476 common->cqm_info.rssi_thold,
477 common->cqm_info.rssi_hyst);
478 }
479 mutex_unlock(&common->mutex);
480}
481
482/**
483 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
484 * @hw: Pointer to the ieee80211_hw structure.
485 * @changed: Changed flags set.
486 * @total_flags: Total initial flags set.
487 * @multicast: Multicast.
488 *
489 * Return: None.
490 */
491static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
492 u32 changed_flags,
493 u32 *total_flags,
494 u64 multicast)
495{
496 /* Not doing much here as of now */
497 *total_flags &= RSI_SUPP_FILTERS;
498}
499
500/**
501 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
502 * (EDCF (aifs, cw_min, cw_max), bursting)
503 * for a hardware TX queue.
504 * @hw: Pointer to the ieee80211_hw structure
505 * @vif: Pointer to the ieee80211_vif structure.
506 * @queue: Queue number.
507 * @params: Pointer to ieee80211_tx_queue_params structure.
508 *
509 * Return: 0 on success, negative error code on failure.
510 */
511static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
512 struct ieee80211_vif *vif, u16 queue,
513 const struct ieee80211_tx_queue_params *params)
514{
515 struct rsi_hw *adapter = hw->priv;
516 struct rsi_common *common = adapter->priv;
517 u8 idx = 0;
518
519 if (queue >= IEEE80211_NUM_ACS)
520 return 0;
521
522 rsi_dbg(INFO_ZONE,
523 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
524 __func__, queue, params->aifs,
525 params->cw_min, params->cw_max, params->txop);
526
527 mutex_lock(&common->mutex);
528 /* Map into the way the f/w expects */
529 switch (queue) {
530 case IEEE80211_AC_VO:
531 idx = VO_Q;
532 break;
533 case IEEE80211_AC_VI:
534 idx = VI_Q;
535 break;
536 case IEEE80211_AC_BE:
537 idx = BE_Q;
538 break;
539 case IEEE80211_AC_BK:
540 idx = BK_Q;
541 break;
542 default:
543 idx = BE_Q;
544 break;
545 }
546
547 memcpy(&common->edca_params[idx],
548 params,
549 sizeof(struct ieee80211_tx_queue_params));
550 mutex_unlock(&common->mutex);
551
552 return 0;
553}
554
555/**
556 * rsi_hal_key_config() - This function loads the keys into the firmware.
557 * @hw: Pointer to the ieee80211_hw structure.
558 * @vif: Pointer to the ieee80211_vif structure.
559 * @key: Pointer to the ieee80211_key_conf structure.
560 *
561 * Return: status: 0 on success, -1 on failure.
562 */
563static int rsi_hal_key_config(struct ieee80211_hw *hw,
564 struct ieee80211_vif *vif,
565 struct ieee80211_key_conf *key)
566{
567 struct rsi_hw *adapter = hw->priv;
568 int status;
569 u8 key_type;
570
571 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
572 key_type = RSI_PAIRWISE_KEY;
573 else
574 key_type = RSI_GROUP_KEY;
575
576 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
577 __func__, key->cipher, key_type, key->keylen);
578
579 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
580 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
581 status = rsi_hal_load_key(adapter->priv,
582 key->key,
583 key->keylen,
584 RSI_PAIRWISE_KEY,
585 key->keyidx,
586 key->cipher);
587 if (status)
588 return status;
589 }
590 return rsi_hal_load_key(adapter->priv,
591 key->key,
592 key->keylen,
593 key_type,
594 key->keyidx,
595 key->cipher);
596}
597
598/**
599 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
600 * @hw: Pointer to the ieee80211_hw structure.
601 * @cmd: enum set_key_cmd.
602 * @vif: Pointer to the ieee80211_vif structure.
603 * @sta: Pointer to the ieee80211_sta structure.
604 * @key: Pointer to the ieee80211_key_conf structure.
605 *
606 * Return: status: 0 on success, negative error code on failure.
607 */
608static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
609 enum set_key_cmd cmd,
610 struct ieee80211_vif *vif,
611 struct ieee80211_sta *sta,
612 struct ieee80211_key_conf *key)
613{
614 struct rsi_hw *adapter = hw->priv;
615 struct rsi_common *common = adapter->priv;
616 struct security_info *secinfo = &common->secinfo;
617 int status;
618
619 mutex_lock(&common->mutex);
620 switch (cmd) {
621 case SET_KEY:
622 secinfo->security_enable = true;
623 status = rsi_hal_key_config(hw, vif, key);
624 if (status) {
625 mutex_unlock(&common->mutex);
626 return status;
627 }
628
629 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
630 secinfo->ptk_cipher = key->cipher;
631 else
632 secinfo->gtk_cipher = key->cipher;
633
634 key->hw_key_idx = key->keyidx;
635 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
636
637 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
638 break;
639
640 case DISABLE_KEY:
641 secinfo->security_enable = false;
642 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
643 memset(key, 0, sizeof(struct ieee80211_key_conf));
644 status = rsi_hal_key_config(hw, vif, key);
645 break;
646
647 default:
648 status = -EOPNOTSUPP;
649 break;
650 }
651
652 mutex_unlock(&common->mutex);
653 return status;
654}
655
656/**
657 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
658 * the corresponding mlme_action flag and
659 * informs the f/w regarding this.
660 * @hw: Pointer to the ieee80211_hw structure.
661 * @vif: Pointer to the ieee80211_vif structure.
662 * @params: Pointer to A-MPDU action parameters
663 *
664 * Return: status: 0 on success, negative error code on failure.
665 */
666static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
667 struct ieee80211_vif *vif,
668 struct ieee80211_ampdu_params *params)
669{
670 int status = -EOPNOTSUPP;
671 struct rsi_hw *adapter = hw->priv;
672 struct rsi_common *common = adapter->priv;
673 u16 seq_no = 0;
674 u8 ii = 0;
675 struct ieee80211_sta *sta = params->sta;
676 enum ieee80211_ampdu_mlme_action action = params->action;
677 u16 tid = params->tid;
678 u16 *ssn = ¶ms->ssn;
679 u8 buf_size = params->buf_size;
680
681 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
682 if (vif == adapter->vifs[ii])
683 break;
684 }
685
686 mutex_lock(&common->mutex);
687 rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
688 if (ssn != NULL)
689 seq_no = *ssn;
690
691 switch (action) {
692 case IEEE80211_AMPDU_RX_START:
693 status = rsi_send_aggregation_params_frame(common,
694 tid,
695 seq_no,
696 buf_size,
697 STA_RX_ADDBA_DONE);
698 break;
699
700 case IEEE80211_AMPDU_RX_STOP:
701 status = rsi_send_aggregation_params_frame(common,
702 tid,
703 0,
704 buf_size,
705 STA_RX_DELBA);
706 break;
707
708 case IEEE80211_AMPDU_TX_START:
709 common->vif_info[ii].seq_start = seq_no;
710 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
711 status = 0;
712 break;
713
714 case IEEE80211_AMPDU_TX_STOP_CONT:
715 case IEEE80211_AMPDU_TX_STOP_FLUSH:
716 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
717 status = rsi_send_aggregation_params_frame(common,
718 tid,
719 seq_no,
720 buf_size,
721 STA_TX_DELBA);
722 if (!status)
723 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
724 break;
725
726 case IEEE80211_AMPDU_TX_OPERATIONAL:
727 status = rsi_send_aggregation_params_frame(common,
728 tid,
729 common->vif_info[ii]
730 .seq_start,
731 buf_size,
732 STA_TX_ADDBA_DONE);
733 break;
734
735 default:
736 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
737 break;
738 }
739
740 mutex_unlock(&common->mutex);
741 return status;
742}
743
744/**
745 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
746 * @hw: Pointer to the ieee80211_hw structure.
747 * @value: Rts threshold value.
748 *
749 * Return: 0 on success.
750 */
751static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
752 u32 value)
753{
754 struct rsi_hw *adapter = hw->priv;
755 struct rsi_common *common = adapter->priv;
756
757 mutex_lock(&common->mutex);
758 common->rts_threshold = value;
759 mutex_unlock(&common->mutex);
760
761 return 0;
762}
763
764/**
765 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
766 * @hw: Pointer to the ieee80211_hw structure
767 * @vif: Pointer to the ieee80211_vif structure.
768 * @mask: Pointer to the cfg80211_bitrate_mask structure.
769 *
770 * Return: 0 on success.
771 */
772static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
773 struct ieee80211_vif *vif,
774 const struct cfg80211_bitrate_mask *mask)
775{
776 struct rsi_hw *adapter = hw->priv;
777 struct rsi_common *common = adapter->priv;
778 enum ieee80211_band band = hw->conf.chandef.chan->band;
779
780 mutex_lock(&common->mutex);
781 common->fixedrate_mask[band] = 0;
782
783 if (mask->control[band].legacy == 0xfff) {
784 common->fixedrate_mask[band] =
785 (mask->control[band].ht_mcs[0] << 12);
786 } else {
787 common->fixedrate_mask[band] =
788 mask->control[band].legacy;
789 }
790 mutex_unlock(&common->mutex);
791
792 return 0;
793}
794
795/**
796 * rsi_perform_cqm() - This function performs cqm.
797 * @common: Pointer to the driver private structure.
798 * @bssid: pointer to the bssid.
799 * @rssi: RSSI value.
800 */
801static void rsi_perform_cqm(struct rsi_common *common,
802 u8 *bssid,
803 s8 rssi)
804{
805 struct rsi_hw *adapter = common->priv;
806 s8 last_event = common->cqm_info.last_cqm_event_rssi;
807 int thold = common->cqm_info.rssi_thold;
808 u32 hyst = common->cqm_info.rssi_hyst;
809 enum nl80211_cqm_rssi_threshold_event event;
810
811 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
812 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
813 else if (rssi > thold &&
814 (last_event == 0 || rssi > (last_event + hyst)))
815 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
816 else
817 return;
818
819 common->cqm_info.last_cqm_event_rssi = rssi;
820 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
821 ieee80211_cqm_rssi_notify(adapter->vifs[0], event, GFP_KERNEL);
822
823 return;
824}
825
826/**
827 * rsi_fill_rx_status() - This function fills rx status in
828 * ieee80211_rx_status structure.
829 * @hw: Pointer to the ieee80211_hw structure.
830 * @skb: Pointer to the socket buffer structure.
831 * @common: Pointer to the driver private structure.
832 * @rxs: Pointer to the ieee80211_rx_status structure.
833 *
834 * Return: None.
835 */
836static void rsi_fill_rx_status(struct ieee80211_hw *hw,
837 struct sk_buff *skb,
838 struct rsi_common *common,
839 struct ieee80211_rx_status *rxs)
840{
841 struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
842 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
843 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
844 struct ieee80211_hdr *hdr;
845 char rssi = rx_params->rssi;
846 u8 hdrlen = 0;
847 u8 channel = rx_params->channel;
848 s32 freq;
849
850 hdr = ((struct ieee80211_hdr *)(skb->data));
851 hdrlen = ieee80211_hdrlen(hdr->frame_control);
852
853 memset(info, 0, sizeof(struct ieee80211_tx_info));
854
855 rxs->signal = -(rssi);
856
857 rxs->band = common->band;
858
859 freq = ieee80211_channel_to_frequency(channel, rxs->band);
860
861 if (freq)
862 rxs->freq = freq;
863
864 if (ieee80211_has_protected(hdr->frame_control)) {
865 if (rsi_is_cipher_wep(common)) {
866 memmove(skb->data + 4, skb->data, hdrlen);
867 skb_pull(skb, 4);
868 } else {
869 memmove(skb->data + 8, skb->data, hdrlen);
870 skb_pull(skb, 8);
871 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
872 }
873 rxs->flag |= RX_FLAG_DECRYPTED;
874 rxs->flag |= RX_FLAG_IV_STRIPPED;
875 }
876
877 /* CQM only for connected AP beacons, the RSSI is a weighted avg */
878 if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
879 if (ieee80211_is_beacon(hdr->frame_control))
880 rsi_perform_cqm(common, hdr->addr2, rxs->signal);
881 }
882
883 return;
884}
885
886/**
887 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
888 * @common: Pointer to the driver private structure.
889 * @skb: Pointer to the socket buffer structure.
890 *
891 * Return: None.
892 */
893void rsi_indicate_pkt_to_os(struct rsi_common *common,
894 struct sk_buff *skb)
895{
896 struct rsi_hw *adapter = common->priv;
897 struct ieee80211_hw *hw = adapter->hw;
898 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
899
900 if ((common->iface_down) || (!adapter->sc_nvifs)) {
901 dev_kfree_skb(skb);
902 return;
903 }
904
905 /* filling in the ieee80211_rx_status flags */
906 rsi_fill_rx_status(hw, skb, common, rx_status);
907
908 ieee80211_rx_irqsafe(hw, skb);
909}
910
911static void rsi_set_min_rate(struct ieee80211_hw *hw,
912 struct ieee80211_sta *sta,
913 struct rsi_common *common)
914{
915 u8 band = hw->conf.chandef.chan->band;
916 u8 ii;
917 u32 rate_bitmap;
918 bool matched = false;
919
920 common->bitrate_mask[band] = sta->supp_rates[band];
921
922 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
923
924 if (rate_bitmap & 0xfff) {
925 /* Find out the min rate */
926 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
927 if (rate_bitmap & BIT(ii)) {
928 common->min_rate = rsi_rates[ii].hw_value;
929 matched = true;
930 break;
931 }
932 }
933 }
934
935 common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
936
937 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
938 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
939 if ((rate_bitmap >> 12) & BIT(ii)) {
940 common->min_rate = rsi_mcsrates[ii];
941 matched = true;
942 break;
943 }
944 }
945 }
946
947 if (!matched)
948 common->min_rate = 0xffff;
949}
950
951/**
952 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
953 * connected.
954 * @hw: pointer to the ieee80211_hw structure.
955 * @vif: Pointer to the ieee80211_vif structure.
956 * @sta: Pointer to the ieee80211_sta structure.
957 *
958 * Return: 0 on success, -1 on failure.
959 */
960static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
961 struct ieee80211_vif *vif,
962 struct ieee80211_sta *sta)
963{
964 struct rsi_hw *adapter = hw->priv;
965 struct rsi_common *common = adapter->priv;
966
967 mutex_lock(&common->mutex);
968
969 rsi_set_min_rate(hw, sta, common);
970
971 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
972 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
973 common->vif_info[0].sgi = true;
974 }
975
976 if (sta->ht_cap.ht_supported)
977 ieee80211_start_tx_ba_session(sta, 0, 0);
978
979 mutex_unlock(&common->mutex);
980
981 return 0;
982}
983
984/**
985 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
986 * getting disconnected.
987 * @hw: Pointer to the ieee80211_hw structure.
988 * @vif: Pointer to the ieee80211_vif structure.
989 * @sta: Pointer to the ieee80211_sta structure.
990 *
991 * Return: 0 on success, -1 on failure.
992 */
993static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
994 struct ieee80211_vif *vif,
995 struct ieee80211_sta *sta)
996{
997 struct rsi_hw *adapter = hw->priv;
998 struct rsi_common *common = adapter->priv;
999
1000 mutex_lock(&common->mutex);
1001 /* Resetting all the fields to default values */
1002 common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0;
1003 common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0;
1004 common->min_rate = 0xffff;
1005 common->vif_info[0].is_ht = false;
1006 common->vif_info[0].sgi = false;
1007 common->vif_info[0].seq_start = 0;
1008 common->secinfo.ptk_cipher = 0;
1009 common->secinfo.gtk_cipher = 0;
1010 mutex_unlock(&common->mutex);
1011
1012 return 0;
1013}
1014
1015static struct ieee80211_ops mac80211_ops = {
1016 .tx = rsi_mac80211_tx,
1017 .start = rsi_mac80211_start,
1018 .stop = rsi_mac80211_stop,
1019 .add_interface = rsi_mac80211_add_interface,
1020 .remove_interface = rsi_mac80211_remove_interface,
1021 .config = rsi_mac80211_config,
1022 .bss_info_changed = rsi_mac80211_bss_info_changed,
1023 .conf_tx = rsi_mac80211_conf_tx,
1024 .configure_filter = rsi_mac80211_conf_filter,
1025 .set_key = rsi_mac80211_set_key,
1026 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1027 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1028 .ampdu_action = rsi_mac80211_ampdu_action,
1029 .sta_add = rsi_mac80211_sta_add,
1030 .sta_remove = rsi_mac80211_sta_remove,
1031};
1032
1033/**
1034 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1035 * @common: Pointer to the driver private structure.
1036 *
1037 * Return: 0 on success, -1 on failure.
1038 */
1039int rsi_mac80211_attach(struct rsi_common *common)
1040{
1041 int status = 0;
1042 struct ieee80211_hw *hw = NULL;
1043 struct wiphy *wiphy = NULL;
1044 struct rsi_hw *adapter = common->priv;
1045 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1046
1047 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1048
1049 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1050 if (!hw) {
1051 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1052 return -ENOMEM;
1053 }
1054
1055 wiphy = hw->wiphy;
1056
1057 SET_IEEE80211_DEV(hw, adapter->device);
1058
1059 hw->priv = adapter;
1060 adapter->hw = hw;
1061
1062 ieee80211_hw_set(hw, SIGNAL_DBM);
1063 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1064 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1065
1066 hw->queues = MAX_HW_QUEUES;
1067 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1068
1069 hw->max_rates = 1;
1070 hw->max_rate_tries = MAX_RETRIES;
1071
1072 hw->max_tx_aggregation_subframes = 6;
1073 rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ);
1074 rsi_register_rates_channels(adapter, IEEE80211_BAND_5GHZ);
1075 hw->rate_control_algorithm = "AARF";
1076
1077 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1078 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1079
1080 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1081 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1082 wiphy->retry_short = RETRY_SHORT;
1083 wiphy->retry_long = RETRY_LONG;
1084 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1085 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1086 wiphy->flags = 0;
1087
1088 wiphy->available_antennas_rx = 1;
1089 wiphy->available_antennas_tx = 1;
1090 wiphy->bands[IEEE80211_BAND_2GHZ] =
1091 &adapter->sbands[IEEE80211_BAND_2GHZ];
1092 wiphy->bands[IEEE80211_BAND_5GHZ] =
1093 &adapter->sbands[IEEE80211_BAND_5GHZ];
1094
1095 status = ieee80211_register_hw(hw);
1096 if (status)
1097 return status;
1098
1099 return rsi_init_dbgfs(adapter);
1100}