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 #include "rsi_ps.h"
22
23 static const struct ieee80211_channel rsi_2ghz_channels[] = {
24 { .band = NL80211_BAND_2GHZ, .center_freq = 2412,
25 .hw_value = 1 }, /* Channel 1 */
26 { .band = NL80211_BAND_2GHZ, .center_freq = 2417,
27 .hw_value = 2 }, /* Channel 2 */
28 { .band = NL80211_BAND_2GHZ, .center_freq = 2422,
29 .hw_value = 3 }, /* Channel 3 */
30 { .band = NL80211_BAND_2GHZ, .center_freq = 2427,
31 .hw_value = 4 }, /* Channel 4 */
32 { .band = NL80211_BAND_2GHZ, .center_freq = 2432,
33 .hw_value = 5 }, /* Channel 5 */
34 { .band = NL80211_BAND_2GHZ, .center_freq = 2437,
35 .hw_value = 6 }, /* Channel 6 */
36 { .band = NL80211_BAND_2GHZ, .center_freq = 2442,
37 .hw_value = 7 }, /* Channel 7 */
38 { .band = NL80211_BAND_2GHZ, .center_freq = 2447,
39 .hw_value = 8 }, /* Channel 8 */
40 { .band = NL80211_BAND_2GHZ, .center_freq = 2452,
41 .hw_value = 9 }, /* Channel 9 */
42 { .band = NL80211_BAND_2GHZ, .center_freq = 2457,
43 .hw_value = 10 }, /* Channel 10 */
44 { .band = NL80211_BAND_2GHZ, .center_freq = 2462,
45 .hw_value = 11 }, /* Channel 11 */
46 { .band = NL80211_BAND_2GHZ, .center_freq = 2467,
47 .hw_value = 12 }, /* Channel 12 */
48 { .band = NL80211_BAND_2GHZ, .center_freq = 2472,
49 .hw_value = 13 }, /* Channel 13 */
50 { .band = NL80211_BAND_2GHZ, .center_freq = 2484,
51 .hw_value = 14 }, /* Channel 14 */
52 };
53
54 static const struct ieee80211_channel rsi_5ghz_channels[] = {
55 { .band = NL80211_BAND_5GHZ, .center_freq = 5180,
56 .hw_value = 36, }, /* Channel 36 */
57 { .band = NL80211_BAND_5GHZ, .center_freq = 5200,
58 .hw_value = 40, }, /* Channel 40 */
59 { .band = NL80211_BAND_5GHZ, .center_freq = 5220,
60 .hw_value = 44, }, /* Channel 44 */
61 { .band = NL80211_BAND_5GHZ, .center_freq = 5240,
62 .hw_value = 48, }, /* Channel 48 */
63 { .band = NL80211_BAND_5GHZ, .center_freq = 5260,
64 .hw_value = 52, }, /* Channel 52 */
65 { .band = NL80211_BAND_5GHZ, .center_freq = 5280,
66 .hw_value = 56, }, /* Channel 56 */
67 { .band = NL80211_BAND_5GHZ, .center_freq = 5300,
68 .hw_value = 60, }, /* Channel 60 */
69 { .band = NL80211_BAND_5GHZ, .center_freq = 5320,
70 .hw_value = 64, }, /* Channel 64 */
71 { .band = NL80211_BAND_5GHZ, .center_freq = 5500,
72 .hw_value = 100, }, /* Channel 100 */
73 { .band = NL80211_BAND_5GHZ, .center_freq = 5520,
74 .hw_value = 104, }, /* Channel 104 */
75 { .band = NL80211_BAND_5GHZ, .center_freq = 5540,
76 .hw_value = 108, }, /* Channel 108 */
77 { .band = NL80211_BAND_5GHZ, .center_freq = 5560,
78 .hw_value = 112, }, /* Channel 112 */
79 { .band = NL80211_BAND_5GHZ, .center_freq = 5580,
80 .hw_value = 116, }, /* Channel 116 */
81 { .band = NL80211_BAND_5GHZ, .center_freq = 5600,
82 .hw_value = 120, }, /* Channel 120 */
83 { .band = NL80211_BAND_5GHZ, .center_freq = 5620,
84 .hw_value = 124, }, /* Channel 124 */
85 { .band = NL80211_BAND_5GHZ, .center_freq = 5640,
86 .hw_value = 128, }, /* Channel 128 */
87 { .band = NL80211_BAND_5GHZ, .center_freq = 5660,
88 .hw_value = 132, }, /* Channel 132 */
89 { .band = NL80211_BAND_5GHZ, .center_freq = 5680,
90 .hw_value = 136, }, /* Channel 136 */
91 { .band = NL80211_BAND_5GHZ, .center_freq = 5700,
92 .hw_value = 140, }, /* Channel 140 */
93 { .band = NL80211_BAND_5GHZ, .center_freq = 5745,
94 .hw_value = 149, }, /* Channel 149 */
95 { .band = NL80211_BAND_5GHZ, .center_freq = 5765,
96 .hw_value = 153, }, /* Channel 153 */
97 { .band = NL80211_BAND_5GHZ, .center_freq = 5785,
98 .hw_value = 157, }, /* Channel 157 */
99 { .band = NL80211_BAND_5GHZ, .center_freq = 5805,
100 .hw_value = 161, }, /* Channel 161 */
101 { .band = NL80211_BAND_5GHZ, .center_freq = 5825,
102 .hw_value = 165, }, /* Channel 165 */
103 };
104
105 struct ieee80211_rate rsi_rates[12] = {
106 { .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 },
107 { .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 },
108 { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
109 { .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 },
110 { .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 },
111 { .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 },
112 { .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 },
113 { .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 },
114 { .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 },
115 { .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 },
116 { .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 },
117 { .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 },
118 };
119
120 const u16 rsi_mcsrates[8] = {
121 RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
122 RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
123 };
124
125 static const u32 rsi_max_ap_stas[16] = {
126 32, /* 1 - Wi-Fi alone */
127 0, /* 2 */
128 0, /* 3 */
129 0, /* 4 - BT EDR alone */
130 4, /* 5 - STA + BT EDR */
131 32, /* 6 - AP + BT EDR */
132 0, /* 7 */
133 0, /* 8 - BT LE alone */
134 4, /* 9 - STA + BE LE */
135 0, /* 10 */
136 0, /* 11 */
137 0, /* 12 */
138 1, /* 13 - STA + BT Dual */
139 4, /* 14 - AP + BT Dual */
140 };
141
142 /**
143 * rsi_is_cipher_wep() - This function determines if the cipher is WEP or not.
144 * @common: Pointer to the driver private structure.
145 *
146 * Return: If cipher type is WEP, a value of 1 is returned, else 0.
147 */
148
rsi_is_cipher_wep(struct rsi_common * common)149 bool rsi_is_cipher_wep(struct rsi_common *common)
150 {
151 if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
152 (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
153 (!common->secinfo.ptk_cipher))
154 return true;
155 else
156 return false;
157 }
158
159 /**
160 * rsi_register_rates_channels() - This function registers channels and rates.
161 * @adapter: Pointer to the adapter structure.
162 * @band: Operating band to be set.
163 *
164 * Return: None.
165 */
rsi_register_rates_channels(struct rsi_hw * adapter,int band)166 static void rsi_register_rates_channels(struct rsi_hw *adapter, int band)
167 {
168 struct ieee80211_supported_band *sbands = &adapter->sbands[band];
169 void *channels = NULL;
170
171 if (band == NL80211_BAND_2GHZ) {
172 channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL);
173 memcpy(channels,
174 rsi_2ghz_channels,
175 sizeof(rsi_2ghz_channels));
176 sbands->band = NL80211_BAND_2GHZ;
177 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
178 sbands->bitrates = rsi_rates;
179 sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
180 } else {
181 channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL);
182 memcpy(channels,
183 rsi_5ghz_channels,
184 sizeof(rsi_5ghz_channels));
185 sbands->band = NL80211_BAND_5GHZ;
186 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
187 sbands->bitrates = &rsi_rates[4];
188 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
189 }
190
191 sbands->channels = channels;
192
193 memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
194 sbands->ht_cap.ht_supported = true;
195 sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
196 IEEE80211_HT_CAP_SGI_20 |
197 IEEE80211_HT_CAP_SGI_40);
198 sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
199 sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
200 sbands->ht_cap.mcs.rx_mask[0] = 0xff;
201 sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
202 /* sbands->ht_cap.mcs.rx_highest = 0x82; */
203 }
204
205 /**
206 * rsi_mac80211_detach() - This function is used to de-initialize the
207 * Mac80211 stack.
208 * @adapter: Pointer to the adapter structure.
209 *
210 * Return: None.
211 */
rsi_mac80211_detach(struct rsi_hw * adapter)212 void rsi_mac80211_detach(struct rsi_hw *adapter)
213 {
214 struct ieee80211_hw *hw = adapter->hw;
215 enum nl80211_band band;
216
217 if (hw) {
218 ieee80211_stop_queues(hw);
219 ieee80211_unregister_hw(hw);
220 ieee80211_free_hw(hw);
221 adapter->hw = NULL;
222 }
223
224 for (band = 0; band < NUM_NL80211_BANDS; band++) {
225 struct ieee80211_supported_band *sband =
226 &adapter->sbands[band];
227
228 kfree(sband->channels);
229 }
230
231 #ifdef CONFIG_RSI_DEBUGFS
232 rsi_remove_dbgfs(adapter);
233 kfree(adapter->dfsentry);
234 #endif
235 }
236 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
237
238 /**
239 * rsi_indicate_tx_status() - This function indicates the transmit status.
240 * @adapter: Pointer to the adapter structure.
241 * @skb: Pointer to the socket buffer structure.
242 * @status: Status
243 *
244 * Return: None.
245 */
rsi_indicate_tx_status(struct rsi_hw * adapter,struct sk_buff * skb,int status)246 void rsi_indicate_tx_status(struct rsi_hw *adapter,
247 struct sk_buff *skb,
248 int status)
249 {
250 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
251 struct skb_info *tx_params;
252
253 if (!adapter->hw) {
254 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
255 return;
256 }
257
258 if (!status)
259 info->flags |= IEEE80211_TX_STAT_ACK;
260
261 tx_params = (struct skb_info *)info->driver_data;
262 skb_pull(skb, tx_params->internal_hdr_size);
263 memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
264
265 ieee80211_tx_status_irqsafe(adapter->hw, skb);
266 }
267
268 /**
269 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
270 * transmitted frame.SKB contains the buffer starting
271 * from the IEEE 802.11 header.
272 * @hw: Pointer to the ieee80211_hw structure.
273 * @control: Pointer to the ieee80211_tx_control structure
274 * @skb: Pointer to the socket buffer structure.
275 *
276 * Return: None
277 */
rsi_mac80211_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)278 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
279 struct ieee80211_tx_control *control,
280 struct sk_buff *skb)
281 {
282 struct rsi_hw *adapter = hw->priv;
283 struct rsi_common *common = adapter->priv;
284
285 rsi_core_xmit(common, skb);
286 }
287
288 /**
289 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
290 * the driver init is complete by then, just
291 * returns success.
292 * @hw: Pointer to the ieee80211_hw structure.
293 *
294 * Return: 0 as success.
295 */
rsi_mac80211_start(struct ieee80211_hw * hw)296 static int rsi_mac80211_start(struct ieee80211_hw *hw)
297 {
298 struct rsi_hw *adapter = hw->priv;
299 struct rsi_common *common = adapter->priv;
300
301 rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
302 mutex_lock(&common->mutex);
303 common->iface_down = false;
304 wiphy_rfkill_start_polling(hw->wiphy);
305 rsi_send_rx_filter_frame(common, 0);
306 mutex_unlock(&common->mutex);
307
308 return 0;
309 }
310
311 /**
312 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
313 * @hw: Pointer to the ieee80211_hw structure.
314 *
315 * Return: None.
316 */
rsi_mac80211_stop(struct ieee80211_hw * hw)317 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
318 {
319 struct rsi_hw *adapter = hw->priv;
320 struct rsi_common *common = adapter->priv;
321
322 rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
323 mutex_lock(&common->mutex);
324 common->iface_down = true;
325 wiphy_rfkill_stop_polling(hw->wiphy);
326
327 /* Block all rx frames */
328 rsi_send_rx_filter_frame(common, 0xffff);
329
330 mutex_unlock(&common->mutex);
331 }
332
333 /**
334 * rsi_mac80211_add_interface() - This function is called when a netdevice
335 * attached to the hardware is enabled.
336 * @hw: Pointer to the ieee80211_hw structure.
337 * @vif: Pointer to the ieee80211_vif structure.
338 *
339 * Return: ret: 0 on success, negative error code on failure.
340 */
rsi_mac80211_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)341 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
342 struct ieee80211_vif *vif)
343 {
344 struct rsi_hw *adapter = hw->priv;
345 struct rsi_common *common = adapter->priv;
346 enum opmode intf_mode;
347 int ret = -EOPNOTSUPP;
348
349 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
350 mutex_lock(&common->mutex);
351
352 if (adapter->sc_nvifs > 1) {
353 mutex_unlock(&common->mutex);
354 return -EOPNOTSUPP;
355 }
356
357 switch (vif->type) {
358 case NL80211_IFTYPE_STATION:
359 rsi_dbg(INFO_ZONE, "Station Mode");
360 intf_mode = STA_OPMODE;
361 break;
362 case NL80211_IFTYPE_AP:
363 rsi_dbg(INFO_ZONE, "AP Mode");
364 intf_mode = AP_OPMODE;
365 break;
366 default:
367 rsi_dbg(ERR_ZONE,
368 "%s: Interface type %d not supported\n", __func__,
369 vif->type);
370 goto out;
371 }
372
373 adapter->vifs[adapter->sc_nvifs++] = vif;
374 ret = rsi_set_vap_capabilities(common, intf_mode, common->mac_addr,
375 0, VAP_ADD);
376 if (ret) {
377 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
378 goto out;
379 }
380
381 if (vif->type == NL80211_IFTYPE_AP) {
382 int i;
383
384 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
385 common->min_rate = RSI_RATE_AUTO;
386 for (i = 0; i < common->max_stations; i++)
387 common->stations[i].sta = NULL;
388 }
389
390 out:
391 mutex_unlock(&common->mutex);
392
393 return ret;
394 }
395
396 /**
397 * rsi_mac80211_remove_interface() - This function notifies driver that an
398 * interface is going down.
399 * @hw: Pointer to the ieee80211_hw structure.
400 * @vif: Pointer to the ieee80211_vif structure.
401 *
402 * Return: None.
403 */
rsi_mac80211_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)404 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
405 struct ieee80211_vif *vif)
406 {
407 struct rsi_hw *adapter = hw->priv;
408 struct rsi_common *common = adapter->priv;
409 enum opmode opmode;
410
411 rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
412
413 mutex_lock(&common->mutex);
414
415 if (adapter->sc_nvifs <= 0) {
416 mutex_unlock(&common->mutex);
417 return;
418 }
419
420 switch (vif->type) {
421 case NL80211_IFTYPE_STATION:
422 opmode = STA_OPMODE;
423 break;
424 case NL80211_IFTYPE_AP:
425 opmode = AP_OPMODE;
426 break;
427 default:
428 mutex_unlock(&common->mutex);
429 return;
430 }
431 rsi_set_vap_capabilities(common, opmode, vif->addr,
432 0, VAP_DELETE);
433 adapter->sc_nvifs--;
434
435 if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
436 adapter->vifs[0] = NULL;
437 mutex_unlock(&common->mutex);
438 }
439
440 /**
441 * rsi_channel_change() - This function is a performs the checks
442 * required for changing a channel and sets
443 * the channel accordingly.
444 * @hw: Pointer to the ieee80211_hw structure.
445 *
446 * Return: 0 on success, negative error code on failure.
447 */
rsi_channel_change(struct ieee80211_hw * hw)448 static int rsi_channel_change(struct ieee80211_hw *hw)
449 {
450 struct rsi_hw *adapter = hw->priv;
451 struct rsi_common *common = adapter->priv;
452 int status = -EOPNOTSUPP;
453 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
454 u16 channel = curchan->hw_value;
455 struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
456
457 rsi_dbg(INFO_ZONE,
458 "%s: Set channel: %d MHz type: %d channel_no %d\n",
459 __func__, curchan->center_freq,
460 curchan->flags, channel);
461
462 if (bss->assoc) {
463 if (!common->hw_data_qs_blocked &&
464 (rsi_get_connected_channel(adapter) != channel)) {
465 rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
466 if (!rsi_send_block_unblock_frame(common, true))
467 common->hw_data_qs_blocked = true;
468 }
469 }
470
471 status = rsi_band_check(common);
472 if (!status)
473 status = rsi_set_channel(adapter->priv, curchan);
474
475 if (bss->assoc) {
476 if (common->hw_data_qs_blocked &&
477 (rsi_get_connected_channel(adapter) == channel)) {
478 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
479 if (!rsi_send_block_unblock_frame(common, false))
480 common->hw_data_qs_blocked = false;
481 }
482 } else {
483 if (common->hw_data_qs_blocked) {
484 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
485 if (!rsi_send_block_unblock_frame(common, false))
486 common->hw_data_qs_blocked = false;
487 }
488 }
489
490 return status;
491 }
492
493 /**
494 * rsi_config_power() - This function configures tx power to device
495 * @hw: Pointer to the ieee80211_hw structure.
496 *
497 * Return: 0 on success, negative error code on failure.
498 */
rsi_config_power(struct ieee80211_hw * hw)499 static int rsi_config_power(struct ieee80211_hw *hw)
500 {
501 struct rsi_hw *adapter = hw->priv;
502 struct rsi_common *common = adapter->priv;
503 struct ieee80211_conf *conf = &hw->conf;
504
505 if (adapter->sc_nvifs <= 0) {
506 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
507 return -EINVAL;
508 }
509
510 rsi_dbg(INFO_ZONE,
511 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
512
513 if (conf->power_level == common->tx_power)
514 return 0;
515
516 common->tx_power = conf->power_level;
517
518 return rsi_send_radio_params_update(common);
519 }
520
521 /**
522 * rsi_mac80211_config() - This function is a handler for configuration
523 * requests. The stack calls this function to
524 * change hardware configuration, e.g., channel.
525 * @hw: Pointer to the ieee80211_hw structure.
526 * @changed: Changed flags set.
527 *
528 * Return: 0 on success, negative error code on failure.
529 */
rsi_mac80211_config(struct ieee80211_hw * hw,u32 changed)530 static int rsi_mac80211_config(struct ieee80211_hw *hw,
531 u32 changed)
532 {
533 struct rsi_hw *adapter = hw->priv;
534 struct rsi_common *common = adapter->priv;
535 struct ieee80211_vif *vif = adapter->vifs[0];
536 struct ieee80211_conf *conf = &hw->conf;
537 int status = -EOPNOTSUPP;
538
539 mutex_lock(&common->mutex);
540
541 if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
542 status = rsi_channel_change(hw);
543
544 /* tx power */
545 if (changed & IEEE80211_CONF_CHANGE_POWER) {
546 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
547 status = rsi_config_power(hw);
548 }
549
550 /* Power save parameters */
551 if ((changed & IEEE80211_CONF_CHANGE_PS) &&
552 (vif->type == NL80211_IFTYPE_STATION)) {
553 unsigned long flags;
554
555 spin_lock_irqsave(&adapter->ps_lock, flags);
556 if (conf->flags & IEEE80211_CONF_PS)
557 rsi_enable_ps(adapter);
558 else
559 rsi_disable_ps(adapter);
560 spin_unlock_irqrestore(&adapter->ps_lock, flags);
561 }
562
563 /* RTS threshold */
564 if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
565 rsi_dbg(INFO_ZONE, "RTS threshold\n");
566 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
567 rsi_dbg(INFO_ZONE,
568 "%s: Sending vap updates....\n", __func__);
569 status = rsi_send_vap_dynamic_update(common);
570 }
571 }
572 mutex_unlock(&common->mutex);
573
574 return status;
575 }
576
577 /**
578 * rsi_get_connected_channel() - This function is used to get the current
579 * connected channel number.
580 * @adapter: Pointer to the adapter structure.
581 *
582 * Return: Current connected AP's channel number is returned.
583 */
rsi_get_connected_channel(struct rsi_hw * adapter)584 u16 rsi_get_connected_channel(struct rsi_hw *adapter)
585 {
586 struct ieee80211_vif *vif = adapter->vifs[0];
587 if (vif) {
588 struct ieee80211_bss_conf *bss = &vif->bss_conf;
589 struct ieee80211_channel *channel = bss->chandef.chan;
590 return channel->hw_value;
591 }
592
593 return 0;
594 }
595
596 /**
597 * rsi_mac80211_bss_info_changed() - This function is a handler for config
598 * requests related to BSS parameters that
599 * may vary during BSS's lifespan.
600 * @hw: Pointer to the ieee80211_hw structure.
601 * @vif: Pointer to the ieee80211_vif structure.
602 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
603 * @changed: Changed flags set.
604 *
605 * Return: None.
606 */
rsi_mac80211_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changed)607 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
608 struct ieee80211_vif *vif,
609 struct ieee80211_bss_conf *bss_conf,
610 u32 changed)
611 {
612 struct rsi_hw *adapter = hw->priv;
613 struct rsi_common *common = adapter->priv;
614 struct ieee80211_bss_conf *bss = &vif->bss_conf;
615 struct ieee80211_conf *conf = &hw->conf;
616 u16 rx_filter_word = 0;
617
618 mutex_lock(&common->mutex);
619 if (changed & BSS_CHANGED_ASSOC) {
620 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
621 __func__, bss_conf->assoc);
622 if (bss_conf->assoc) {
623 /* Send the RX filter frame */
624 rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
625 ALLOW_CTRL_ASSOC_PEER |
626 ALLOW_MGMT_ASSOC_PEER);
627 rsi_send_rx_filter_frame(common, rx_filter_word);
628 }
629 rsi_inform_bss_status(common,
630 STA_OPMODE,
631 bss_conf->assoc,
632 bss_conf->bssid,
633 bss_conf->qos,
634 bss_conf->aid,
635 NULL, 0);
636 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
637 adapter->ps_info.listen_interval = conf->listen_interval;
638
639 /* If U-APSD is updated, send ps parameters to firmware */
640 if (bss->assoc) {
641 if (common->uapsd_bitmap) {
642 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
643 rsi_conf_uapsd(adapter);
644 }
645 } else {
646 common->uapsd_bitmap = 0;
647 }
648 }
649
650 if (changed & BSS_CHANGED_CQM) {
651 common->cqm_info.last_cqm_event_rssi = 0;
652 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
653 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
654 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
655 common->cqm_info.rssi_thold,
656 common->cqm_info.rssi_hyst);
657 }
658
659 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
660 (vif->type == NL80211_IFTYPE_AP)) {
661 if (bss->enable_beacon) {
662 rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
663 common->beacon_enabled = 1;
664 } else {
665 rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
666 common->beacon_enabled = 0;
667 }
668 }
669
670 mutex_unlock(&common->mutex);
671 }
672
673 /**
674 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
675 * @hw: Pointer to the ieee80211_hw structure.
676 * @changed: Changed flags set.
677 * @total_flags: Total initial flags set.
678 * @multicast: Multicast.
679 *
680 * Return: None.
681 */
rsi_mac80211_conf_filter(struct ieee80211_hw * hw,u32 changed_flags,u32 * total_flags,u64 multicast)682 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
683 u32 changed_flags,
684 u32 *total_flags,
685 u64 multicast)
686 {
687 /* Not doing much here as of now */
688 *total_flags &= RSI_SUPP_FILTERS;
689 }
690
691 /**
692 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
693 * (EDCF (aifs, cw_min, cw_max), bursting)
694 * for a hardware TX queue.
695 * @hw: Pointer to the ieee80211_hw structure
696 * @vif: Pointer to the ieee80211_vif structure.
697 * @queue: Queue number.
698 * @params: Pointer to ieee80211_tx_queue_params structure.
699 *
700 * Return: 0 on success, negative error code on failure.
701 */
rsi_mac80211_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)702 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
703 struct ieee80211_vif *vif, u16 queue,
704 const struct ieee80211_tx_queue_params *params)
705 {
706 struct rsi_hw *adapter = hw->priv;
707 struct rsi_common *common = adapter->priv;
708 u8 idx = 0;
709
710 if (queue >= IEEE80211_NUM_ACS)
711 return 0;
712
713 rsi_dbg(INFO_ZONE,
714 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
715 __func__, queue, params->aifs,
716 params->cw_min, params->cw_max, params->txop);
717
718 mutex_lock(&common->mutex);
719 /* Map into the way the f/w expects */
720 switch (queue) {
721 case IEEE80211_AC_VO:
722 idx = VO_Q;
723 break;
724 case IEEE80211_AC_VI:
725 idx = VI_Q;
726 break;
727 case IEEE80211_AC_BE:
728 idx = BE_Q;
729 break;
730 case IEEE80211_AC_BK:
731 idx = BK_Q;
732 break;
733 default:
734 idx = BE_Q;
735 break;
736 }
737
738 memcpy(&common->edca_params[idx],
739 params,
740 sizeof(struct ieee80211_tx_queue_params));
741
742 if (params->uapsd)
743 common->uapsd_bitmap |= idx;
744 else
745 common->uapsd_bitmap &= (~idx);
746
747 mutex_unlock(&common->mutex);
748
749 return 0;
750 }
751
752 /**
753 * rsi_hal_key_config() - This function loads the keys into the firmware.
754 * @hw: Pointer to the ieee80211_hw structure.
755 * @vif: Pointer to the ieee80211_vif structure.
756 * @key: Pointer to the ieee80211_key_conf structure.
757 *
758 * Return: status: 0 on success, negative error codes on failure.
759 */
rsi_hal_key_config(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * key,struct ieee80211_sta * sta)760 static int rsi_hal_key_config(struct ieee80211_hw *hw,
761 struct ieee80211_vif *vif,
762 struct ieee80211_key_conf *key,
763 struct ieee80211_sta *sta)
764 {
765 struct rsi_hw *adapter = hw->priv;
766 struct rsi_sta *rsta = NULL;
767 int status;
768 u8 key_type;
769 s16 sta_id = 0;
770
771 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
772 key_type = RSI_PAIRWISE_KEY;
773 else
774 key_type = RSI_GROUP_KEY;
775
776 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
777 __func__, key->cipher, key_type, key->keylen);
778
779 if (vif->type == NL80211_IFTYPE_AP) {
780 if (sta) {
781 rsta = rsi_find_sta(adapter->priv, sta->addr);
782 if (rsta)
783 sta_id = rsta->sta_id;
784 }
785 adapter->priv->key = key;
786 } else {
787 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
788 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
789 status = rsi_hal_load_key(adapter->priv,
790 key->key,
791 key->keylen,
792 RSI_PAIRWISE_KEY,
793 key->keyidx,
794 key->cipher,
795 sta_id);
796 if (status)
797 return status;
798 }
799 }
800
801 return rsi_hal_load_key(adapter->priv,
802 key->key,
803 key->keylen,
804 key_type,
805 key->keyidx,
806 key->cipher,
807 sta_id);
808 }
809
810 /**
811 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
812 * @hw: Pointer to the ieee80211_hw structure.
813 * @cmd: enum set_key_cmd.
814 * @vif: Pointer to the ieee80211_vif structure.
815 * @sta: Pointer to the ieee80211_sta structure.
816 * @key: Pointer to the ieee80211_key_conf structure.
817 *
818 * Return: status: 0 on success, negative error code on failure.
819 */
rsi_mac80211_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)820 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
821 enum set_key_cmd cmd,
822 struct ieee80211_vif *vif,
823 struct ieee80211_sta *sta,
824 struct ieee80211_key_conf *key)
825 {
826 struct rsi_hw *adapter = hw->priv;
827 struct rsi_common *common = adapter->priv;
828 struct security_info *secinfo = &common->secinfo;
829 int status;
830
831 mutex_lock(&common->mutex);
832 switch (cmd) {
833 case SET_KEY:
834 secinfo->security_enable = true;
835 status = rsi_hal_key_config(hw, vif, key, sta);
836 if (status) {
837 mutex_unlock(&common->mutex);
838 return status;
839 }
840
841 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
842 secinfo->ptk_cipher = key->cipher;
843 else
844 secinfo->gtk_cipher = key->cipher;
845
846 key->hw_key_idx = key->keyidx;
847 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
848
849 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
850 break;
851
852 case DISABLE_KEY:
853 if (vif->type == NL80211_IFTYPE_STATION)
854 secinfo->security_enable = false;
855 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
856 memset(key, 0, sizeof(struct ieee80211_key_conf));
857 status = rsi_hal_key_config(hw, vif, key, sta);
858 break;
859
860 default:
861 status = -EOPNOTSUPP;
862 break;
863 }
864
865 mutex_unlock(&common->mutex);
866 return status;
867 }
868
869 /**
870 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
871 * the corresponding mlme_action flag and
872 * informs the f/w regarding this.
873 * @hw: Pointer to the ieee80211_hw structure.
874 * @vif: Pointer to the ieee80211_vif structure.
875 * @params: Pointer to A-MPDU action parameters
876 *
877 * Return: status: 0 on success, negative error code on failure.
878 */
rsi_mac80211_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)879 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
880 struct ieee80211_vif *vif,
881 struct ieee80211_ampdu_params *params)
882 {
883 int status = -EOPNOTSUPP;
884 struct rsi_hw *adapter = hw->priv;
885 struct rsi_common *common = adapter->priv;
886 struct rsi_sta *rsta = NULL;
887 u16 seq_no = 0, seq_start = 0;
888 u8 ii = 0;
889 struct ieee80211_sta *sta = params->sta;
890 u8 sta_id = 0;
891 enum ieee80211_ampdu_mlme_action action = params->action;
892 u16 tid = params->tid;
893 u16 *ssn = ¶ms->ssn;
894 u8 buf_size = params->buf_size;
895
896 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
897 if (vif == adapter->vifs[ii])
898 break;
899 }
900
901 mutex_lock(&common->mutex);
902
903 if (ssn != NULL)
904 seq_no = *ssn;
905
906 if (vif->type == NL80211_IFTYPE_AP) {
907 rsta = rsi_find_sta(common, sta->addr);
908 if (!rsta) {
909 rsi_dbg(ERR_ZONE, "No station mapped\n");
910 status = 0;
911 goto unlock;
912 }
913 sta_id = rsta->sta_id;
914 }
915
916 rsi_dbg(INFO_ZONE,
917 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
918 __func__, tid, seq_no, buf_size, sta_id);
919
920 switch (action) {
921 case IEEE80211_AMPDU_RX_START:
922 status = rsi_send_aggregation_params_frame(common,
923 tid,
924 seq_no,
925 buf_size,
926 STA_RX_ADDBA_DONE,
927 sta_id);
928 break;
929
930 case IEEE80211_AMPDU_RX_STOP:
931 status = rsi_send_aggregation_params_frame(common,
932 tid,
933 0,
934 buf_size,
935 STA_RX_DELBA,
936 sta_id);
937 break;
938
939 case IEEE80211_AMPDU_TX_START:
940 if (vif->type == NL80211_IFTYPE_STATION)
941 common->vif_info[ii].seq_start = seq_no;
942 else if (vif->type == NL80211_IFTYPE_AP)
943 rsta->seq_start[tid] = seq_no;
944 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
945 status = 0;
946 break;
947
948 case IEEE80211_AMPDU_TX_STOP_CONT:
949 case IEEE80211_AMPDU_TX_STOP_FLUSH:
950 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
951 status = rsi_send_aggregation_params_frame(common,
952 tid,
953 seq_no,
954 buf_size,
955 STA_TX_DELBA,
956 sta_id);
957 if (!status)
958 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
959 break;
960
961 case IEEE80211_AMPDU_TX_OPERATIONAL:
962 if (vif->type == NL80211_IFTYPE_STATION)
963 seq_start = common->vif_info[ii].seq_start;
964 else if (vif->type == NL80211_IFTYPE_AP)
965 seq_start = rsta->seq_start[tid];
966 status = rsi_send_aggregation_params_frame(common,
967 tid,
968 seq_start,
969 buf_size,
970 STA_TX_ADDBA_DONE,
971 sta_id);
972 break;
973
974 default:
975 rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
976 break;
977 }
978
979 unlock:
980 mutex_unlock(&common->mutex);
981 return status;
982 }
983
984 /**
985 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
986 * @hw: Pointer to the ieee80211_hw structure.
987 * @value: Rts threshold value.
988 *
989 * Return: 0 on success.
990 */
rsi_mac80211_set_rts_threshold(struct ieee80211_hw * hw,u32 value)991 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
992 u32 value)
993 {
994 struct rsi_hw *adapter = hw->priv;
995 struct rsi_common *common = adapter->priv;
996
997 mutex_lock(&common->mutex);
998 common->rts_threshold = value;
999 mutex_unlock(&common->mutex);
1000
1001 return 0;
1002 }
1003
1004 /**
1005 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1006 * @hw: Pointer to the ieee80211_hw structure
1007 * @vif: Pointer to the ieee80211_vif structure.
1008 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1009 *
1010 * Return: 0 on success.
1011 */
rsi_mac80211_set_rate_mask(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct cfg80211_bitrate_mask * mask)1012 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1013 struct ieee80211_vif *vif,
1014 const struct cfg80211_bitrate_mask *mask)
1015 {
1016 struct rsi_hw *adapter = hw->priv;
1017 struct rsi_common *common = adapter->priv;
1018 enum nl80211_band band = hw->conf.chandef.chan->band;
1019
1020 mutex_lock(&common->mutex);
1021 common->fixedrate_mask[band] = 0;
1022
1023 if (mask->control[band].legacy == 0xfff) {
1024 common->fixedrate_mask[band] =
1025 (mask->control[band].ht_mcs[0] << 12);
1026 } else {
1027 common->fixedrate_mask[band] =
1028 mask->control[band].legacy;
1029 }
1030 mutex_unlock(&common->mutex);
1031
1032 return 0;
1033 }
1034
1035 /**
1036 * rsi_perform_cqm() - This function performs cqm.
1037 * @common: Pointer to the driver private structure.
1038 * @bssid: pointer to the bssid.
1039 * @rssi: RSSI value.
1040 */
rsi_perform_cqm(struct rsi_common * common,u8 * bssid,s8 rssi)1041 static void rsi_perform_cqm(struct rsi_common *common,
1042 u8 *bssid,
1043 s8 rssi)
1044 {
1045 struct rsi_hw *adapter = common->priv;
1046 s8 last_event = common->cqm_info.last_cqm_event_rssi;
1047 int thold = common->cqm_info.rssi_thold;
1048 u32 hyst = common->cqm_info.rssi_hyst;
1049 enum nl80211_cqm_rssi_threshold_event event;
1050
1051 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1052 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1053 else if (rssi > thold &&
1054 (last_event == 0 || rssi > (last_event + hyst)))
1055 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1056 else
1057 return;
1058
1059 common->cqm_info.last_cqm_event_rssi = rssi;
1060 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1061 ieee80211_cqm_rssi_notify(adapter->vifs[0], event, rssi, GFP_KERNEL);
1062
1063 return;
1064 }
1065
1066 /**
1067 * rsi_fill_rx_status() - This function fills rx status in
1068 * ieee80211_rx_status structure.
1069 * @hw: Pointer to the ieee80211_hw structure.
1070 * @skb: Pointer to the socket buffer structure.
1071 * @common: Pointer to the driver private structure.
1072 * @rxs: Pointer to the ieee80211_rx_status structure.
1073 *
1074 * Return: None.
1075 */
rsi_fill_rx_status(struct ieee80211_hw * hw,struct sk_buff * skb,struct rsi_common * common,struct ieee80211_rx_status * rxs)1076 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1077 struct sk_buff *skb,
1078 struct rsi_common *common,
1079 struct ieee80211_rx_status *rxs)
1080 {
1081 struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
1082 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1083 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1084 struct ieee80211_hdr *hdr;
1085 char rssi = rx_params->rssi;
1086 u8 hdrlen = 0;
1087 u8 channel = rx_params->channel;
1088 s32 freq;
1089
1090 hdr = ((struct ieee80211_hdr *)(skb->data));
1091 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1092
1093 memset(info, 0, sizeof(struct ieee80211_tx_info));
1094
1095 rxs->signal = -(rssi);
1096
1097 rxs->band = common->band;
1098
1099 freq = ieee80211_channel_to_frequency(channel, rxs->band);
1100
1101 if (freq)
1102 rxs->freq = freq;
1103
1104 if (ieee80211_has_protected(hdr->frame_control)) {
1105 if (rsi_is_cipher_wep(common)) {
1106 memmove(skb->data + 4, skb->data, hdrlen);
1107 skb_pull(skb, 4);
1108 } else {
1109 memmove(skb->data + 8, skb->data, hdrlen);
1110 skb_pull(skb, 8);
1111 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1112 }
1113 rxs->flag |= RX_FLAG_DECRYPTED;
1114 rxs->flag |= RX_FLAG_IV_STRIPPED;
1115 }
1116
1117 /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1118 if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1119 if (ieee80211_is_beacon(hdr->frame_control))
1120 rsi_perform_cqm(common, hdr->addr2, rxs->signal);
1121 }
1122
1123 return;
1124 }
1125
1126 /**
1127 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
1128 * @common: Pointer to the driver private structure.
1129 * @skb: Pointer to the socket buffer structure.
1130 *
1131 * Return: None.
1132 */
rsi_indicate_pkt_to_os(struct rsi_common * common,struct sk_buff * skb)1133 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1134 struct sk_buff *skb)
1135 {
1136 struct rsi_hw *adapter = common->priv;
1137 struct ieee80211_hw *hw = adapter->hw;
1138 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1139
1140 if ((common->iface_down) || (!adapter->sc_nvifs)) {
1141 dev_kfree_skb(skb);
1142 return;
1143 }
1144
1145 /* filling in the ieee80211_rx_status flags */
1146 rsi_fill_rx_status(hw, skb, common, rx_status);
1147
1148 ieee80211_rx_irqsafe(hw, skb);
1149 }
1150
rsi_set_min_rate(struct ieee80211_hw * hw,struct ieee80211_sta * sta,struct rsi_common * common)1151 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1152 struct ieee80211_sta *sta,
1153 struct rsi_common *common)
1154 {
1155 u8 band = hw->conf.chandef.chan->band;
1156 u8 ii;
1157 u32 rate_bitmap;
1158 bool matched = false;
1159
1160 common->bitrate_mask[band] = sta->supp_rates[band];
1161
1162 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1163
1164 if (rate_bitmap & 0xfff) {
1165 /* Find out the min rate */
1166 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1167 if (rate_bitmap & BIT(ii)) {
1168 common->min_rate = rsi_rates[ii].hw_value;
1169 matched = true;
1170 break;
1171 }
1172 }
1173 }
1174
1175 common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1176
1177 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1178 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1179 if ((rate_bitmap >> 12) & BIT(ii)) {
1180 common->min_rate = rsi_mcsrates[ii];
1181 matched = true;
1182 break;
1183 }
1184 }
1185 }
1186
1187 if (!matched)
1188 common->min_rate = 0xffff;
1189 }
1190
1191 /**
1192 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1193 * connected.
1194 * @hw: pointer to the ieee80211_hw structure.
1195 * @vif: Pointer to the ieee80211_vif structure.
1196 * @sta: Pointer to the ieee80211_sta structure.
1197 *
1198 * Return: 0 on success, negative error codes on failure.
1199 */
rsi_mac80211_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1200 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1201 struct ieee80211_vif *vif,
1202 struct ieee80211_sta *sta)
1203 {
1204 struct rsi_hw *adapter = hw->priv;
1205 struct rsi_common *common = adapter->priv;
1206 bool sta_exist = false;
1207 struct rsi_sta *rsta;
1208 int status = 0;
1209
1210 rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1211
1212 mutex_lock(&common->mutex);
1213
1214 if (vif->type == NL80211_IFTYPE_AP) {
1215 u8 cnt;
1216 int sta_idx = -1;
1217 int free_index = -1;
1218
1219 /* Check if max stations reached */
1220 if (common->num_stations >= common->max_stations) {
1221 rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1222 status = -EOPNOTSUPP;
1223 goto unlock;
1224 }
1225 for (cnt = 0; cnt < common->max_stations; cnt++) {
1226 rsta = &common->stations[cnt];
1227
1228 if (!rsta->sta) {
1229 if (free_index < 0)
1230 free_index = cnt;
1231 continue;
1232 }
1233 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1234 rsi_dbg(INFO_ZONE, "Station exists\n");
1235 sta_idx = cnt;
1236 sta_exist = true;
1237 break;
1238 }
1239 }
1240 if (!sta_exist) {
1241 if (free_index >= 0)
1242 sta_idx = free_index;
1243 }
1244 if (sta_idx < 0) {
1245 rsi_dbg(ERR_ZONE,
1246 "%s: Some problem reaching here...\n",
1247 __func__);
1248 status = -EINVAL;
1249 goto unlock;
1250 }
1251 rsta = &common->stations[sta_idx];
1252 rsta->sta = sta;
1253 rsta->sta_id = sta_idx;
1254 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1255 rsta->start_tx_aggr[cnt] = false;
1256 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1257 rsta->seq_start[cnt] = 0;
1258 if (!sta_exist) {
1259 rsi_dbg(INFO_ZONE, "New Station\n");
1260
1261 /* Send peer notify to device */
1262 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1263 rsi_inform_bss_status(common, AP_OPMODE, 1, sta->addr,
1264 sta->wme, sta->aid, sta, sta_idx);
1265
1266 if (common->key) {
1267 struct ieee80211_key_conf *key = common->key;
1268
1269 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1270 (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1271 rsi_hal_load_key(adapter->priv,
1272 key->key,
1273 key->keylen,
1274 RSI_PAIRWISE_KEY,
1275 key->keyidx,
1276 key->cipher,
1277 sta_idx);
1278 }
1279
1280 common->num_stations++;
1281 }
1282 }
1283
1284 if (vif->type == NL80211_IFTYPE_STATION) {
1285 rsi_set_min_rate(hw, sta, common);
1286 if (sta->ht_cap.ht_supported) {
1287 common->vif_info[0].is_ht = true;
1288 common->bitrate_mask[NL80211_BAND_2GHZ] =
1289 sta->supp_rates[NL80211_BAND_2GHZ];
1290 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1291 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1292 common->vif_info[0].sgi = true;
1293 ieee80211_start_tx_ba_session(sta, 0, 0);
1294 }
1295 }
1296
1297 unlock:
1298 mutex_unlock(&common->mutex);
1299
1300 return status;
1301 }
1302
1303 /**
1304 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1305 * getting disconnected.
1306 * @hw: Pointer to the ieee80211_hw structure.
1307 * @vif: Pointer to the ieee80211_vif structure.
1308 * @sta: Pointer to the ieee80211_sta structure.
1309 *
1310 * Return: 0 on success, negative error codes on failure.
1311 */
rsi_mac80211_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1312 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1313 struct ieee80211_vif *vif,
1314 struct ieee80211_sta *sta)
1315 {
1316 struct rsi_hw *adapter = hw->priv;
1317 struct rsi_common *common = adapter->priv;
1318 struct ieee80211_bss_conf *bss = &vif->bss_conf;
1319 struct rsi_sta *rsta;
1320
1321 rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1322
1323 mutex_lock(&common->mutex);
1324
1325 if (vif->type == NL80211_IFTYPE_AP) {
1326 u8 sta_idx, cnt;
1327
1328 /* Send peer notify to device */
1329 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1330 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1331 rsta = &common->stations[sta_idx];
1332
1333 if (!rsta->sta)
1334 continue;
1335 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1336 rsi_inform_bss_status(common, AP_OPMODE, 0,
1337 sta->addr, sta->wme,
1338 sta->aid, sta, sta_idx);
1339 rsta->sta = NULL;
1340 rsta->sta_id = -1;
1341 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1342 rsta->start_tx_aggr[cnt] = false;
1343 if (common->num_stations > 0)
1344 common->num_stations--;
1345 break;
1346 }
1347 }
1348 if (sta_idx >= common->max_stations)
1349 rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1350 }
1351
1352 if (vif->type == NL80211_IFTYPE_STATION) {
1353 /* Resetting all the fields to default values */
1354 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1355 bss->qos = sta->wme;
1356 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1357 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1358 common->min_rate = 0xffff;
1359 common->vif_info[0].is_ht = false;
1360 common->vif_info[0].sgi = false;
1361 common->vif_info[0].seq_start = 0;
1362 common->secinfo.ptk_cipher = 0;
1363 common->secinfo.gtk_cipher = 0;
1364 if (!common->iface_down)
1365 rsi_send_rx_filter_frame(common, 0);
1366 }
1367 mutex_unlock(&common->mutex);
1368
1369 return 0;
1370 }
1371
1372 /**
1373 * rsi_mac80211_set_antenna() - This function is used to configure
1374 * tx and rx antennas.
1375 * @hw: Pointer to the ieee80211_hw structure.
1376 * @tx_ant: Bitmap for tx antenna
1377 * @rx_ant: Bitmap for rx antenna
1378 *
1379 * Return: 0 on success, Negative error code on failure.
1380 */
rsi_mac80211_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)1381 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1382 u32 tx_ant, u32 rx_ant)
1383 {
1384 struct rsi_hw *adapter = hw->priv;
1385 struct rsi_common *common = adapter->priv;
1386 u8 antenna = 0;
1387
1388 if (tx_ant > 1 || rx_ant > 1) {
1389 rsi_dbg(ERR_ZONE,
1390 "Invalid antenna selection (tx: %d, rx:%d)\n",
1391 tx_ant, rx_ant);
1392 rsi_dbg(ERR_ZONE,
1393 "Use 0 for int_ant, 1 for ext_ant\n");
1394 return -EINVAL;
1395 }
1396
1397 rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1398 __func__, tx_ant, rx_ant);
1399
1400 mutex_lock(&common->mutex);
1401
1402 antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1403 if (common->ant_in_use != antenna)
1404 if (rsi_set_antenna(common, antenna))
1405 goto fail_set_antenna;
1406
1407 rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1408 tx_ant ? "UFL" : "INT");
1409
1410 common->ant_in_use = antenna;
1411
1412 mutex_unlock(&common->mutex);
1413
1414 return 0;
1415
1416 fail_set_antenna:
1417 rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1418 mutex_unlock(&common->mutex);
1419 return -EINVAL;
1420 }
1421
1422 /**
1423 * rsi_mac80211_get_antenna() - This function is used to configure
1424 * tx and rx antennas.
1425 *
1426 * @hw: Pointer to the ieee80211_hw structure.
1427 * @tx_ant: Bitmap for tx antenna
1428 * @rx_ant: Bitmap for rx antenna
1429 *
1430 * Return: 0 on success, negative error codes on failure.
1431 */
rsi_mac80211_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)1432 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1433 u32 *tx_ant, u32 *rx_ant)
1434 {
1435 struct rsi_hw *adapter = hw->priv;
1436 struct rsi_common *common = adapter->priv;
1437
1438 mutex_lock(&common->mutex);
1439
1440 *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1441 *rx_ant = 0;
1442
1443 mutex_unlock(&common->mutex);
1444
1445 return 0;
1446 }
1447
rsi_map_region_code(enum nl80211_dfs_regions region_code)1448 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1449 {
1450 switch (region_code) {
1451 case NL80211_DFS_FCC:
1452 return RSI_REGION_FCC;
1453 case NL80211_DFS_ETSI:
1454 return RSI_REGION_ETSI;
1455 case NL80211_DFS_JP:
1456 return RSI_REGION_TELEC;
1457 case NL80211_DFS_UNSET:
1458 return RSI_REGION_WORLD;
1459 }
1460 return RSI_REGION_WORLD;
1461 }
1462
rsi_reg_notify(struct wiphy * wiphy,struct regulatory_request * request)1463 static void rsi_reg_notify(struct wiphy *wiphy,
1464 struct regulatory_request *request)
1465 {
1466 struct ieee80211_supported_band *sband;
1467 struct ieee80211_channel *ch;
1468 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1469 struct rsi_hw * adapter = hw->priv;
1470 struct rsi_common *common = adapter->priv;
1471 int i;
1472
1473 mutex_lock(&common->mutex);
1474
1475 rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1476 request->alpha2, request->dfs_region);
1477
1478 if (common->num_supp_bands > 1) {
1479 sband = wiphy->bands[NL80211_BAND_5GHZ];
1480
1481 for (i = 0; i < sband->n_channels; i++) {
1482 ch = &sband->channels[i];
1483 if (ch->flags & IEEE80211_CHAN_DISABLED)
1484 continue;
1485
1486 if (ch->flags & IEEE80211_CHAN_RADAR)
1487 ch->flags |= IEEE80211_CHAN_NO_IR;
1488 }
1489 }
1490 adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1491 rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1492
1493 adapter->country[0] = request->alpha2[0];
1494 adapter->country[1] = request->alpha2[1];
1495
1496 mutex_unlock(&common->mutex);
1497 }
1498
rsi_mac80211_rfkill_poll(struct ieee80211_hw * hw)1499 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1500 {
1501 struct rsi_hw *adapter = hw->priv;
1502 struct rsi_common *common = adapter->priv;
1503
1504 mutex_lock(&common->mutex);
1505 if (common->fsm_state != FSM_MAC_INIT_DONE)
1506 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1507 else
1508 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1509 mutex_unlock(&common->mutex);
1510 }
1511
1512 static const struct ieee80211_ops mac80211_ops = {
1513 .tx = rsi_mac80211_tx,
1514 .start = rsi_mac80211_start,
1515 .stop = rsi_mac80211_stop,
1516 .add_interface = rsi_mac80211_add_interface,
1517 .remove_interface = rsi_mac80211_remove_interface,
1518 .config = rsi_mac80211_config,
1519 .bss_info_changed = rsi_mac80211_bss_info_changed,
1520 .conf_tx = rsi_mac80211_conf_tx,
1521 .configure_filter = rsi_mac80211_conf_filter,
1522 .set_key = rsi_mac80211_set_key,
1523 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1524 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1525 .ampdu_action = rsi_mac80211_ampdu_action,
1526 .sta_add = rsi_mac80211_sta_add,
1527 .sta_remove = rsi_mac80211_sta_remove,
1528 .set_antenna = rsi_mac80211_set_antenna,
1529 .get_antenna = rsi_mac80211_get_antenna,
1530 .rfkill_poll = rsi_mac80211_rfkill_poll,
1531 };
1532
1533 /**
1534 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1535 * @common: Pointer to the driver private structure.
1536 *
1537 * Return: 0 on success, negative error codes on failure.
1538 */
rsi_mac80211_attach(struct rsi_common * common)1539 int rsi_mac80211_attach(struct rsi_common *common)
1540 {
1541 int status = 0;
1542 struct ieee80211_hw *hw = NULL;
1543 struct wiphy *wiphy = NULL;
1544 struct rsi_hw *adapter = common->priv;
1545 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1546
1547 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1548
1549 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1550 if (!hw) {
1551 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1552 return -ENOMEM;
1553 }
1554
1555 wiphy = hw->wiphy;
1556
1557 SET_IEEE80211_DEV(hw, adapter->device);
1558
1559 hw->priv = adapter;
1560 adapter->hw = hw;
1561
1562 ieee80211_hw_set(hw, SIGNAL_DBM);
1563 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1564 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1565 ieee80211_hw_set(hw, SUPPORTS_PS);
1566 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
1567
1568 hw->queues = MAX_HW_QUEUES;
1569 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1570
1571 hw->max_rates = 1;
1572 hw->max_rate_tries = MAX_RETRIES;
1573 hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
1574 hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
1575
1576 hw->max_tx_aggregation_subframes = 6;
1577 rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1578 rsi_register_rates_channels(adapter, NL80211_BAND_5GHZ);
1579 hw->rate_control_algorithm = "AARF";
1580
1581 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1582 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1583
1584 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1585 BIT(NL80211_IFTYPE_AP);
1586 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1587 wiphy->retry_short = RETRY_SHORT;
1588 wiphy->retry_long = RETRY_LONG;
1589 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1590 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1591 wiphy->flags = 0;
1592
1593 wiphy->available_antennas_rx = 1;
1594 wiphy->available_antennas_tx = 1;
1595 wiphy->bands[NL80211_BAND_2GHZ] =
1596 &adapter->sbands[NL80211_BAND_2GHZ];
1597 wiphy->bands[NL80211_BAND_5GHZ] =
1598 &adapter->sbands[NL80211_BAND_5GHZ];
1599
1600 /* AP Parameters */
1601 wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
1602 common->max_stations = wiphy->max_ap_assoc_sta;
1603 rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
1604 hw->sta_data_size = sizeof(struct rsi_sta);
1605 wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
1606 wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
1607 wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
1608 wiphy->reg_notifier = rsi_reg_notify;
1609
1610 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1611
1612 status = ieee80211_register_hw(hw);
1613 if (status)
1614 return status;
1615
1616 return rsi_init_dbgfs(adapter);
1617 }
1618