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rsi: Fixed the kernel doc
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / rsi / rsi_91x_mac80211.c
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dad0d04f
FF		 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_8K;
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/**
19d2e619 188 * rsi_mac80211_detach() - This function is used to de-initialize the
dad0d04f
FF		 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_mac80211_config() - This function is a handler for configuration
345 * requests. The stack calls this function to
346 * change hardware configuration, e.g., channel.
347 * @hw: Pointer to the ieee80211_hw structure.
348 * @changed: Changed flags set.
349 *
350 * Return: 0 on success, negative error code on failure.
351 */
352static int rsi_mac80211_config(struct ieee80211_hw *hw,
353 u32 changed)
354{
355 struct rsi_hw *adapter = hw->priv;
356 struct rsi_common *common = adapter->priv;
357 int status = -EOPNOTSUPP;
358
359 mutex_lock(&common->mutex);
360 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
361 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
362 u16 channel = curchan->hw_value;
363
364 rsi_dbg(INFO_ZONE,
365 "%s: Set channel: %d MHz type: %d channel_no %d\n",
366 __func__, curchan->center_freq,
367 curchan->flags, channel);
368 common->band = curchan->band;
369 status = rsi_set_channel(adapter->priv, channel);
370 }
371 mutex_unlock(&common->mutex);
372
373 return status;
374}
375
376/**
377 * rsi_get_connected_channel() - This function is used to get the current
378 * connected channel number.
379 * @adapter: Pointer to the adapter structure.
380 *
381 * Return: Current connected AP's channel number is returned.
382 */
383u16 rsi_get_connected_channel(struct rsi_hw *adapter)
384{
385 struct ieee80211_vif *vif = adapter->vifs[0];
386 if (vif) {
387 struct ieee80211_bss_conf *bss = &vif->bss_conf;
388 struct ieee80211_channel *channel = bss->chandef.chan;
389 return channel->hw_value;
390 }
391
392 return 0;
393}
394
395/**
396 * rsi_mac80211_bss_info_changed() - This function is a handler for config
397 * requests related to BSS parameters that
398 * may vary during BSS's lifespan.
399 * @hw: Pointer to the ieee80211_hw structure.
400 * @vif: Pointer to the ieee80211_vif structure.
401 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
402 * @changed: Changed flags set.
403 *
404 * Return: None.
405 */
406static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
407 struct ieee80211_vif *vif,
408 struct ieee80211_bss_conf *bss_conf,
409 u32 changed)
410{
411 struct rsi_hw *adapter = hw->priv;
412 struct rsi_common *common = adapter->priv;
413
414 mutex_lock(&common->mutex);
415 if (changed & BSS_CHANGED_ASSOC) {
416 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
417 __func__, bss_conf->assoc);
418 rsi_inform_bss_status(common,
419 bss_conf->assoc,
420 bss_conf->bssid,
421 bss_conf->qos,
422 bss_conf->aid);
423 }
424 mutex_unlock(&common->mutex);
425}
426
427/**
428 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
429 * @hw: Pointer to the ieee80211_hw structure.
430 * @changed: Changed flags set.
431 * @total_flags: Total initial flags set.
432 * @multicast: Multicast.
433 *
434 * Return: None.
435 */
436static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
437 u32 changed_flags,
438 u32 *total_flags,
439 u64 multicast)
440{
441 /* Not doing much here as of now */
442 *total_flags &= RSI_SUPP_FILTERS;
443}
444
445/**
446 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
447 * (EDCF (aifs, cw_min, cw_max), bursting)
448 * for a hardware TX queue.
449 * @hw: Pointer to the ieee80211_hw structure
450 * @vif: Pointer to the ieee80211_vif structure.
451 * @queue: Queue number.
452 * @params: Pointer to ieee80211_tx_queue_params structure.
453 *
454 * Return: 0 on success, negative error code on failure.
455 */
456static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
457 struct ieee80211_vif *vif, u16 queue,
458 const struct ieee80211_tx_queue_params *params)
459{
460 struct rsi_hw *adapter = hw->priv;
461 struct rsi_common *common = adapter->priv;
462 u8 idx = 0;
463
464 if (queue >= IEEE80211_NUM_ACS)
465 return 0;
466
467 rsi_dbg(INFO_ZONE,
468 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
469 __func__, queue, params->aifs,
470 params->cw_min, params->cw_max, params->txop);
471
472 mutex_lock(&common->mutex);
473 /* Map into the way the f/w expects */
474 switch (queue) {
475 case IEEE80211_AC_VO:
476 idx = VO_Q;
477 break;
478 case IEEE80211_AC_VI:
479 idx = VI_Q;
480 break;
481 case IEEE80211_AC_BE:
482 idx = BE_Q;
483 break;
484 case IEEE80211_AC_BK:
485 idx = BK_Q;
486 break;
487 default:
488 idx = BE_Q;
489 break;
490 }
491
492 memcpy(&common->edca_params[idx],
493 params,
494 sizeof(struct ieee80211_tx_queue_params));
495 mutex_unlock(&common->mutex);
496
497 return 0;
498}
499
500/**
501 * rsi_hal_key_config() - This function loads the keys into the firmware.
502 * @hw: Pointer to the ieee80211_hw structure.
503 * @vif: Pointer to the ieee80211_vif structure.
504 * @key: Pointer to the ieee80211_key_conf structure.
505 *
506 * Return: status: 0 on success, -1 on failure.
507 */
508static int rsi_hal_key_config(struct ieee80211_hw *hw,
509 struct ieee80211_vif *vif,
510 struct ieee80211_key_conf *key)
511{
512 struct rsi_hw *adapter = hw->priv;
513 int status;
514 u8 key_type;
515
516 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
517 key_type = RSI_PAIRWISE_KEY;
518 else
519 key_type = RSI_GROUP_KEY;
520
521 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
522 __func__, key->cipher, key_type, key->keylen);
523
524 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
525 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
526 status = rsi_hal_load_key(adapter->priv,
527 key->key,
528 key->keylen,
529 RSI_PAIRWISE_KEY,
530 key->keyidx,
531 key->cipher);
532 if (status)
533 return status;
534 }
535 return rsi_hal_load_key(adapter->priv,
536 key->key,
537 key->keylen,
538 key_type,
539 key->keyidx,
540 key->cipher);
541}
542
543/**
544 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
545 * @hw: Pointer to the ieee80211_hw structure.
546 * @cmd: enum set_key_cmd.
547 * @vif: Pointer to the ieee80211_vif structure.
548 * @sta: Pointer to the ieee80211_sta structure.
549 * @key: Pointer to the ieee80211_key_conf structure.
550 *
551 * Return: status: 0 on success, negative error code on failure.
552 */
553static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
554 enum set_key_cmd cmd,
555 struct ieee80211_vif *vif,
556 struct ieee80211_sta *sta,
557 struct ieee80211_key_conf *key)
558{
559 struct rsi_hw *adapter = hw->priv;
560 struct rsi_common *common = adapter->priv;
561 struct security_info *secinfo = &common->secinfo;
562 int status;
563
564 mutex_lock(&common->mutex);
565 switch (cmd) {
566 case SET_KEY:
567 secinfo->security_enable = true;
568 status = rsi_hal_key_config(hw, vif, key);
569 if (status) {
570 mutex_unlock(&common->mutex);
571 return status;
572 }
573
574 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
575 secinfo->ptk_cipher = key->cipher;
576 else
577 secinfo->gtk_cipher = key->cipher;
578
579 key->hw_key_idx = key->keyidx;
580 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
581
582 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
583 break;
584
585 case DISABLE_KEY:
586 secinfo->security_enable = false;
587 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
588 memset(key, 0, sizeof(struct ieee80211_key_conf));
589 status = rsi_hal_key_config(hw, vif, key);
590 break;
591
592 default:
593 status = -EOPNOTSUPP;
594 break;
595 }
596
597 mutex_unlock(&common->mutex);
598 return status;
599}
600
601/**
602 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
603 * the corresponding mlme_action flag and
604 * informs the f/w regarding this.
605 * @hw: Pointer to the ieee80211_hw structure.
606 * @vif: Pointer to the ieee80211_vif structure.
607 * @action: ieee80211_ampdu_mlme_action enum.
608 * @sta: Pointer to the ieee80211_sta structure.
609 * @tid: Traffic identifier.
610 * @ssn: Pointer to ssn value.
611 * @buf_size: Buffer size (for kernel version > 2.6.38).
612 *
613 * Return: status: 0 on success, negative error code on failure.
614 */
615static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
616 struct ieee80211_vif *vif,
617 enum ieee80211_ampdu_mlme_action action,
618 struct ieee80211_sta *sta,
619 unsigned short tid,
620 unsigned short *ssn,
621 unsigned char buf_size)
622{
623 int status = -EOPNOTSUPP;
624 struct rsi_hw *adapter = hw->priv;
625 struct rsi_common *common = adapter->priv;
626 u16 seq_no = 0;
627 u8 ii = 0;
628
629 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
630 if (vif == adapter->vifs[ii])
631 break;
632 }
633
634 mutex_lock(&common->mutex);
635 rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
636 if (ssn != NULL)
637 seq_no = *ssn;
638
639 switch (action) {
640 case IEEE80211_AMPDU_RX_START:
641 status = rsi_send_aggregation_params_frame(common,
642 tid,
643 seq_no,
644 buf_size,
645 STA_RX_ADDBA_DONE);
646 break;
647
648 case IEEE80211_AMPDU_RX_STOP:
649 status = rsi_send_aggregation_params_frame(common,
650 tid,
651 0,
652 buf_size,
653 STA_RX_DELBA);
654 break;
655
656 case IEEE80211_AMPDU_TX_START:
657 common->vif_info[ii].seq_start = seq_no;
658 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
5f407acb 659 status = 0;
dad0d04f
FF		 660 break;
661
662 case IEEE80211_AMPDU_TX_STOP_CONT:
663 case IEEE80211_AMPDU_TX_STOP_FLUSH:
664 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
665 status = rsi_send_aggregation_params_frame(common,
666 tid,
667 seq_no,
668 buf_size,
669 STA_TX_DELBA);
670 if (!status)
671 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
672 break;
673
674 case IEEE80211_AMPDU_TX_OPERATIONAL:
675 status = rsi_send_aggregation_params_frame(common,
676 tid,
677 common->vif_info[ii]
678 .seq_start,
679 buf_size,
680 STA_TX_ADDBA_DONE);
681 break;
682
683 default:
684 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
685 break;
686 }
687
688 mutex_unlock(&common->mutex);
689 return status;
690}
691
692/**
693 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
694 * @hw: Pointer to the ieee80211_hw structure.
695 * @value: Rts threshold value.
696 *
697 * Return: 0 on success.
698 */
699static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
700 u32 value)
701{
702 struct rsi_hw *adapter = hw->priv;
703 struct rsi_common *common = adapter->priv;
704
705 mutex_lock(&common->mutex);
706 common->rts_threshold = value;
707 mutex_unlock(&common->mutex);
708
709 return 0;
710}
711
712/**
713 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
714 * @hw: Pointer to the ieee80211_hw structure
715 * @vif: Pointer to the ieee80211_vif structure.
716 * @mask: Pointer to the cfg80211_bitrate_mask structure.
717 *
718 * Return: 0 on success.
719 */
720static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
721 struct ieee80211_vif *vif,
722 const struct cfg80211_bitrate_mask *mask)
723{
724 struct rsi_hw *adapter = hw->priv;
725 struct rsi_common *common = adapter->priv;
726
727 mutex_lock(&common->mutex);
728
729 common->fixedrate_mask[IEEE80211_BAND_2GHZ] = 0;
730
731 if (mask->control[IEEE80211_BAND_2GHZ].legacy == 0xfff) {
732 common->fixedrate_mask[IEEE80211_BAND_2GHZ] =
733 (mask->control[IEEE80211_BAND_2GHZ].ht_mcs[0] << 12);
734 } else {
735 common->fixedrate_mask[IEEE80211_BAND_2GHZ] =
736 mask->control[IEEE80211_BAND_2GHZ].legacy;
737 }
738 mutex_unlock(&common->mutex);
739
740 return 0;
741}
742
743/**
744 * rsi_fill_rx_status() - This function fills rx status in
745 * ieee80211_rx_status structure.
746 * @hw: Pointer to the ieee80211_hw structure.
747 * @skb: Pointer to the socket buffer structure.
748 * @common: Pointer to the driver private structure.
749 * @rxs: Pointer to the ieee80211_rx_status structure.
750 *
751 * Return: None.
752 */
753static void rsi_fill_rx_status(struct ieee80211_hw *hw,
754 struct sk_buff *skb,
755 struct rsi_common *common,
756 struct ieee80211_rx_status *rxs)
757{
758 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
759 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
760 struct ieee80211_hdr *hdr;
761 char rssi = rx_params->rssi;
762 u8 hdrlen = 0;
763 u8 channel = rx_params->channel;
764 s32 freq;
765
766 hdr = ((struct ieee80211_hdr *)(skb->data));
767 hdrlen = ieee80211_hdrlen(hdr->frame_control);
768
769 memset(info, 0, sizeof(struct ieee80211_tx_info));
770
771 rxs->signal = -(rssi);
772
773 if (channel <= 14)
774 rxs->band = IEEE80211_BAND_2GHZ;
775 else
776 rxs->band = IEEE80211_BAND_5GHZ;
777
778 freq = ieee80211_channel_to_frequency(channel, rxs->band);
779
780 if (freq)
781 rxs->freq = freq;
782
783 if (ieee80211_has_protected(hdr->frame_control)) {
784 if (rsi_is_cipher_wep(common)) {
785 memmove(skb->data + 4, skb->data, hdrlen);
786 skb_pull(skb, 4);
787 } else {
788 memmove(skb->data + 8, skb->data, hdrlen);
789 skb_pull(skb, 8);
790 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
791 }
792 rxs->flag |= RX_FLAG_DECRYPTED;
793 rxs->flag |= RX_FLAG_IV_STRIPPED;
794 }
795}
796
797/**
798 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
799 * @common: Pointer to the driver private structure.
800 * @skb: Pointer to the socket buffer structure.
801 *
802 * Return: None.
803 */
804void rsi_indicate_pkt_to_os(struct rsi_common *common,
805 struct sk_buff *skb)
806{
807 struct rsi_hw *adapter = common->priv;
808 struct ieee80211_hw *hw = adapter->hw;
809 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
810
811 if ((common->iface_down) || (!adapter->sc_nvifs)) {
812 dev_kfree_skb(skb);
813 return;
814 }
815
816 /* filling in the ieee80211_rx_status flags */
817 rsi_fill_rx_status(hw, skb, common, rx_status);
818
819 ieee80211_rx_irqsafe(hw, skb);
820}
821
822static void rsi_set_min_rate(struct ieee80211_hw *hw,
823 struct ieee80211_sta *sta,
824 struct rsi_common *common)
825{
826 u8 band = hw->conf.chandef.chan->band;
827 u8 ii;
828 u32 rate_bitmap;
829 bool matched = false;
830
831 common->bitrate_mask[band] = sta->supp_rates[band];
832
833 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
834
835 if (rate_bitmap & 0xfff) {
836 /* Find out the min rate */
837 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
838 if (rate_bitmap & BIT(ii)) {
839 common->min_rate = rsi_rates[ii].hw_value;
840 matched = true;
841 break;
842 }
843 }
844 }
845
846 common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
847
848 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
849 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
850 if ((rate_bitmap >> 12) & BIT(ii)) {
851 common->min_rate = rsi_mcsrates[ii];
852 matched = true;
853 break;
854 }
855 }
856 }
857
858 if (!matched)
859 common->min_rate = 0xffff;
860}
861
862/**
863 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
864 * connected.
865 * @hw: pointer to the ieee80211_hw structure.
866 * @vif: Pointer to the ieee80211_vif structure.
867 * @sta: Pointer to the ieee80211_sta structure.
868 *
869 * Return: 0 on success, -1 on failure.
870 */
871static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
872 struct ieee80211_vif *vif,
873 struct ieee80211_sta *sta)
874{
875 struct rsi_hw *adapter = hw->priv;
876 struct rsi_common *common = adapter->priv;
877
878 mutex_lock(&common->mutex);
879
880 rsi_set_min_rate(hw, sta, common);
881
882 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
883 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
884 common->vif_info[0].sgi = true;
885 }
886
887 if (sta->ht_cap.ht_supported)
888 ieee80211_start_tx_ba_session(sta, 0, 0);
889
890 mutex_unlock(&common->mutex);
891
892 return 0;
893}
894
895/**
896 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
897 * getting disconnected.
898 * @hw: Pointer to the ieee80211_hw structure.
899 * @vif: Pointer to the ieee80211_vif structure.
900 * @sta: Pointer to the ieee80211_sta structure.
901 *
902 * Return: 0 on success, -1 on failure.
903 */
904static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
905 struct ieee80211_vif *vif,
906 struct ieee80211_sta *sta)
907{
908 struct rsi_hw *adapter = hw->priv;
909 struct rsi_common *common = adapter->priv;
910
911 mutex_lock(&common->mutex);
912 /* Resetting all the fields to default values */
913 common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0;
914 common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0;
915 common->min_rate = 0xffff;
916 common->vif_info[0].is_ht = false;
917 common->vif_info[0].sgi = false;
918 common->vif_info[0].seq_start = 0;
919 common->secinfo.ptk_cipher = 0;
920 common->secinfo.gtk_cipher = 0;
921 mutex_unlock(&common->mutex);
922
923 return 0;
924}
925
926static struct ieee80211_ops mac80211_ops = {
927 .tx = rsi_mac80211_tx,
928 .start = rsi_mac80211_start,
929 .stop = rsi_mac80211_stop,
930 .add_interface = rsi_mac80211_add_interface,
931 .remove_interface = rsi_mac80211_remove_interface,
932 .config = rsi_mac80211_config,
933 .bss_info_changed = rsi_mac80211_bss_info_changed,
934 .conf_tx = rsi_mac80211_conf_tx,
935 .configure_filter = rsi_mac80211_conf_filter,
936 .set_key = rsi_mac80211_set_key,
937 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
938 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
939 .ampdu_action = rsi_mac80211_ampdu_action,
940 .sta_add = rsi_mac80211_sta_add,
941 .sta_remove = rsi_mac80211_sta_remove,
942};
943
944/**
945 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
946 * @common: Pointer to the driver private structure.
947 *
948 * Return: 0 on success, -1 on failure.
949 */
950int rsi_mac80211_attach(struct rsi_common *common)
951{
952 int status = 0;
953 struct ieee80211_hw *hw = NULL;
954 struct wiphy *wiphy = NULL;
955 struct rsi_hw *adapter = common->priv;
956 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
957
958 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
959
960 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
961 if (!hw) {
962 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
963 return -ENOMEM;
964 }
965
966 wiphy = hw->wiphy;
967
968 SET_IEEE80211_DEV(hw, adapter->device);
969
970 hw->priv = adapter;
971 adapter->hw = hw;
972
973 hw->flags = IEEE80211_HW_SIGNAL_DBM |
974 IEEE80211_HW_HAS_RATE_CONTROL |
975 IEEE80211_HW_AMPDU_AGGREGATION |
976 0;
977
978 hw->queues = MAX_HW_QUEUES;
979 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
980
981 hw->max_rates = 1;
982 hw->max_rate_tries = MAX_RETRIES;
983
984 hw->max_tx_aggregation_subframes = 6;
985 rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ);
986 hw->rate_control_algorithm = "AARF";
987
988 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
989 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
990
991 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
992 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
993 wiphy->retry_short = RETRY_SHORT;
994 wiphy->retry_long = RETRY_LONG;
995 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
996 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
997 wiphy->flags = 0;
998
999 wiphy->available_antennas_rx = 1;
1000 wiphy->available_antennas_tx = 1;
1001 wiphy->bands[IEEE80211_BAND_2GHZ] =
1002 &adapter->sbands[IEEE80211_BAND_2GHZ];
1003
1004 status = ieee80211_register_hw(hw);
1005 if (status)
1006 return status;
1007
1008 return rsi_init_dbgfs(adapter);
1009}
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