xref: /linux/drivers/net/wireless/rsi/rsi_91x_mac80211.c (revision e5c86679d5e864947a52fb31e45a425dea3e7fa9)
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 
22 static const struct ieee80211_channel rsi_2ghz_channels[] = {
23 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2412,
24 	  .hw_value = 1 }, /* Channel 1 */
25 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2417,
26 	  .hw_value = 2 }, /* Channel 2 */
27 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2422,
28 	  .hw_value = 3 }, /* Channel 3 */
29 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2427,
30 	  .hw_value = 4 }, /* Channel 4 */
31 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2432,
32 	  .hw_value = 5 }, /* Channel 5 */
33 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2437,
34 	  .hw_value = 6 }, /* Channel 6 */
35 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2442,
36 	  .hw_value = 7 }, /* Channel 7 */
37 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2447,
38 	  .hw_value = 8 }, /* Channel 8 */
39 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2452,
40 	  .hw_value = 9 }, /* Channel 9 */
41 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2457,
42 	  .hw_value = 10 }, /* Channel 10 */
43 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2462,
44 	  .hw_value = 11 }, /* Channel 11 */
45 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2467,
46 	  .hw_value = 12 }, /* Channel 12 */
47 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2472,
48 	  .hw_value = 13 }, /* Channel 13 */
49 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2484,
50 	  .hw_value = 14 }, /* Channel 14 */
51 };
52 
53 static const struct ieee80211_channel rsi_5ghz_channels[] = {
54 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5180,
55 	  .hw_value = 36,  }, /* Channel 36 */
56 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5200,
57 	  .hw_value = 40, }, /* Channel 40 */
58 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5220,
59 	  .hw_value = 44, }, /* Channel 44 */
60 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5240,
61 	  .hw_value = 48, }, /* Channel 48 */
62 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5260,
63 	  .hw_value = 52, }, /* Channel 52 */
64 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5280,
65 	  .hw_value = 56, }, /* Channel 56 */
66 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5300,
67 	  .hw_value = 60, }, /* Channel 60 */
68 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5320,
69 	  .hw_value = 64, }, /* Channel 64 */
70 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5500,
71 	  .hw_value = 100, }, /* Channel 100 */
72 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5520,
73 	  .hw_value = 104, }, /* Channel 104 */
74 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5540,
75 	  .hw_value = 108, }, /* Channel 108 */
76 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5560,
77 	  .hw_value = 112, }, /* Channel 112 */
78 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5580,
79 	  .hw_value = 116, }, /* Channel 116 */
80 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5600,
81 	  .hw_value = 120, }, /* Channel 120 */
82 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5620,
83 	  .hw_value = 124, }, /* Channel 124 */
84 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5640,
85 	  .hw_value = 128, }, /* Channel 128 */
86 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5660,
87 	  .hw_value = 132, }, /* Channel 132 */
88 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5680,
89 	  .hw_value = 136, }, /* Channel 136 */
90 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5700,
91 	  .hw_value = 140, }, /* Channel 140 */
92 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5745,
93 	  .hw_value = 149, }, /* Channel 149 */
94 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5765,
95 	  .hw_value = 153, }, /* Channel 153 */
96 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5785,
97 	  .hw_value = 157, }, /* Channel 157 */
98 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5805,
99 	  .hw_value = 161, }, /* Channel 161 */
100 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5825,
101 	  .hw_value = 165, }, /* Channel 165 */
102 };
103 
104 struct 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 
119 const 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 
131 bool 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  */
148 static 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 == NL80211_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 = NL80211_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 = NL80211_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  */
194 void rsi_mac80211_detach(struct rsi_hw *adapter)
195 {
196 	struct ieee80211_hw *hw = adapter->hw;
197 	enum nl80211_band band;
198 
199 	if (hw) {
200 		ieee80211_stop_queues(hw);
201 		ieee80211_unregister_hw(hw);
202 		ieee80211_free_hw(hw);
203 	}
204 
205 	for (band = 0; band < NUM_NL80211_BANDS; band++) {
206 		struct ieee80211_supported_band *sband =
207 					&adapter->sbands[band];
208 
209 		kfree(sband->channels);
210 	}
211 
212 #ifdef CONFIG_RSI_DEBUGFS
213 	rsi_remove_dbgfs(adapter);
214 	kfree(adapter->dfsentry);
215 #endif
216 }
217 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
218 
219 /**
220  * rsi_indicate_tx_status() - This function indicates the transmit status.
221  * @adapter: Pointer to the adapter structure.
222  * @skb: Pointer to the socket buffer structure.
223  * @status: Status
224  *
225  * Return: None.
226  */
227 void rsi_indicate_tx_status(struct rsi_hw *adapter,
228 			    struct sk_buff *skb,
229 			    int status)
230 {
231 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
232 
233 	memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
234 
235 	if (!status)
236 		info->flags |= IEEE80211_TX_STAT_ACK;
237 
238 	ieee80211_tx_status_irqsafe(adapter->hw, skb);
239 }
240 
241 /**
242  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
243  *		       transmitted frame.SKB contains the buffer starting
244  *		       from the IEEE 802.11 header.
245  * @hw: Pointer to the ieee80211_hw structure.
246  * @control: Pointer to the ieee80211_tx_control structure
247  * @skb: Pointer to the socket buffer structure.
248  *
249  * Return: None
250  */
251 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
252 			    struct ieee80211_tx_control *control,
253 			    struct sk_buff *skb)
254 {
255 	struct rsi_hw *adapter = hw->priv;
256 	struct rsi_common *common = adapter->priv;
257 
258 	rsi_core_xmit(common, skb);
259 }
260 
261 /**
262  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
263  *			  the driver init is complete by then, just
264  *			  returns success.
265  * @hw: Pointer to the ieee80211_hw structure.
266  *
267  * Return: 0 as success.
268  */
269 static int rsi_mac80211_start(struct ieee80211_hw *hw)
270 {
271 	struct rsi_hw *adapter = hw->priv;
272 	struct rsi_common *common = adapter->priv;
273 
274 	mutex_lock(&common->mutex);
275 	common->iface_down = false;
276 	mutex_unlock(&common->mutex);
277 
278 	rsi_send_rx_filter_frame(common, 0);
279 
280 	return 0;
281 }
282 
283 /**
284  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
285  * @hw: Pointer to the ieee80211_hw structure.
286  *
287  * Return: None.
288  */
289 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
290 {
291 	struct rsi_hw *adapter = hw->priv;
292 	struct rsi_common *common = adapter->priv;
293 
294 	mutex_lock(&common->mutex);
295 	common->iface_down = true;
296 	mutex_unlock(&common->mutex);
297 }
298 
299 /**
300  * rsi_mac80211_add_interface() - This function is called when a netdevice
301  *				  attached to the hardware is enabled.
302  * @hw: Pointer to the ieee80211_hw structure.
303  * @vif: Pointer to the ieee80211_vif structure.
304  *
305  * Return: ret: 0 on success, negative error code on failure.
306  */
307 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
308 				      struct ieee80211_vif *vif)
309 {
310 	struct rsi_hw *adapter = hw->priv;
311 	struct rsi_common *common = adapter->priv;
312 	int ret = -EOPNOTSUPP;
313 
314 	mutex_lock(&common->mutex);
315 	switch (vif->type) {
316 	case NL80211_IFTYPE_STATION:
317 		if (!adapter->sc_nvifs) {
318 			++adapter->sc_nvifs;
319 			adapter->vifs[0] = vif;
320 			ret = rsi_set_vap_capabilities(common,
321 						       STA_OPMODE,
322 						       VAP_ADD);
323 		}
324 		break;
325 	default:
326 		rsi_dbg(ERR_ZONE,
327 			"%s: Interface type %d not supported\n", __func__,
328 			vif->type);
329 	}
330 	mutex_unlock(&common->mutex);
331 
332 	return ret;
333 }
334 
335 /**
336  * rsi_mac80211_remove_interface() - This function notifies driver that an
337  *				     interface is going down.
338  * @hw: Pointer to the ieee80211_hw structure.
339  * @vif: Pointer to the ieee80211_vif structure.
340  *
341  * Return: None.
342  */
343 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
344 					  struct ieee80211_vif *vif)
345 {
346 	struct rsi_hw *adapter = hw->priv;
347 	struct rsi_common *common = adapter->priv;
348 
349 	mutex_lock(&common->mutex);
350 	if (vif->type == NL80211_IFTYPE_STATION) {
351 		adapter->sc_nvifs--;
352 		rsi_set_vap_capabilities(common, STA_OPMODE, VAP_DELETE);
353 	}
354 
355 	if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
356 		adapter->vifs[0] = NULL;
357 	mutex_unlock(&common->mutex);
358 }
359 
360 /**
361  * rsi_channel_change() - This function is a performs the checks
362  *			  required for changing a channel and sets
363  *			  the channel accordingly.
364  * @hw: Pointer to the ieee80211_hw structure.
365  *
366  * Return: 0 on success, negative error code on failure.
367  */
368 static int rsi_channel_change(struct ieee80211_hw *hw)
369 {
370 	struct rsi_hw *adapter = hw->priv;
371 	struct rsi_common *common = adapter->priv;
372 	int status = -EOPNOTSUPP;
373 	struct ieee80211_channel *curchan = hw->conf.chandef.chan;
374 	u16 channel = curchan->hw_value;
375 	struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
376 
377 	rsi_dbg(INFO_ZONE,
378 		"%s: Set channel: %d MHz type: %d channel_no %d\n",
379 		__func__, curchan->center_freq,
380 		curchan->flags, channel);
381 
382 	if (bss->assoc) {
383 		if (!common->hw_data_qs_blocked &&
384 		    (rsi_get_connected_channel(adapter) != channel)) {
385 			rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
386 			if (!rsi_send_block_unblock_frame(common, true))
387 				common->hw_data_qs_blocked = true;
388 		}
389 	}
390 
391 	status = rsi_band_check(common);
392 	if (!status)
393 		status = rsi_set_channel(adapter->priv, curchan);
394 
395 	if (bss->assoc) {
396 		if (common->hw_data_qs_blocked &&
397 		    (rsi_get_connected_channel(adapter) == channel)) {
398 			rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
399 			if (!rsi_send_block_unblock_frame(common, false))
400 				common->hw_data_qs_blocked = false;
401 		}
402 	} else {
403 		if (common->hw_data_qs_blocked) {
404 			rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
405 			if (!rsi_send_block_unblock_frame(common, false))
406 				common->hw_data_qs_blocked = false;
407 		}
408 	}
409 
410 	return status;
411 }
412 
413 /**
414  * rsi_config_power() - This function configures tx power to device
415  * @hw: Pointer to the ieee80211_hw structure.
416  *
417  * Return: 0 on success, negative error code on failure.
418  */
419 static int rsi_config_power(struct ieee80211_hw *hw)
420 {
421 	struct rsi_hw *adapter = hw->priv;
422 	struct rsi_common *common = adapter->priv;
423 	struct ieee80211_conf *conf = &hw->conf;
424 
425 	if (adapter->sc_nvifs <= 0) {
426 		rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
427 		return -EINVAL;
428 	}
429 
430 	rsi_dbg(INFO_ZONE,
431 		"%s: Set tx power: %d dBM\n", __func__, conf->power_level);
432 
433 	if (conf->power_level == common->tx_power)
434 		return 0;
435 
436 	common->tx_power = conf->power_level;
437 
438 	return rsi_send_radio_params_update(common);
439 }
440 
441 /**
442  * rsi_mac80211_config() - This function is a handler for configuration
443  *			   requests. The stack calls this function to
444  *			   change hardware configuration, e.g., channel.
445  * @hw: Pointer to the ieee80211_hw structure.
446  * @changed: Changed flags set.
447  *
448  * Return: 0 on success, negative error code on failure.
449  */
450 static int rsi_mac80211_config(struct ieee80211_hw *hw,
451 			       u32 changed)
452 {
453 	struct rsi_hw *adapter = hw->priv;
454 	struct rsi_common *common = adapter->priv;
455 	int status = -EOPNOTSUPP;
456 
457 	mutex_lock(&common->mutex);
458 
459 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
460 		status = rsi_channel_change(hw);
461 
462 	/* tx power */
463 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
464 		rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
465 		status = rsi_config_power(hw);
466 	}
467 
468 	mutex_unlock(&common->mutex);
469 
470 	return status;
471 }
472 
473 /**
474  * rsi_get_connected_channel() - This function is used to get the current
475  *				 connected channel number.
476  * @adapter: Pointer to the adapter structure.
477  *
478  * Return: Current connected AP's channel number is returned.
479  */
480 u16 rsi_get_connected_channel(struct rsi_hw *adapter)
481 {
482 	struct ieee80211_vif *vif = adapter->vifs[0];
483 	if (vif) {
484 		struct ieee80211_bss_conf *bss = &vif->bss_conf;
485 		struct ieee80211_channel *channel = bss->chandef.chan;
486 		return channel->hw_value;
487 	}
488 
489 	return 0;
490 }
491 
492 /**
493  * rsi_mac80211_bss_info_changed() - This function is a handler for config
494  *				     requests related to BSS parameters that
495  *				     may vary during BSS's lifespan.
496  * @hw: Pointer to the ieee80211_hw structure.
497  * @vif: Pointer to the ieee80211_vif structure.
498  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
499  * @changed: Changed flags set.
500  *
501  * Return: None.
502  */
503 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
504 					  struct ieee80211_vif *vif,
505 					  struct ieee80211_bss_conf *bss_conf,
506 					  u32 changed)
507 {
508 	struct rsi_hw *adapter = hw->priv;
509 	struct rsi_common *common = adapter->priv;
510 	u16 rx_filter_word = 0;
511 
512 	mutex_lock(&common->mutex);
513 	if (changed & BSS_CHANGED_ASSOC) {
514 		rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
515 			__func__, bss_conf->assoc);
516 		if (bss_conf->assoc) {
517 			/* Send the RX filter frame */
518 			rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
519 					  ALLOW_CTRL_ASSOC_PEER |
520 					  ALLOW_MGMT_ASSOC_PEER);
521 			rsi_send_rx_filter_frame(common, rx_filter_word);
522 		}
523 		rsi_inform_bss_status(common,
524 				      bss_conf->assoc,
525 				      bss_conf->bssid,
526 				      bss_conf->qos,
527 				      bss_conf->aid);
528 	}
529 
530 	if (changed & BSS_CHANGED_CQM) {
531 		common->cqm_info.last_cqm_event_rssi = 0;
532 		common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
533 		common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
534 		rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
535 			common->cqm_info.rssi_thold,
536 			common->cqm_info.rssi_hyst);
537 	}
538 	mutex_unlock(&common->mutex);
539 }
540 
541 /**
542  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
543  * @hw: Pointer to the ieee80211_hw structure.
544  * @changed: Changed flags set.
545  * @total_flags: Total initial flags set.
546  * @multicast: Multicast.
547  *
548  * Return: None.
549  */
550 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
551 				     u32 changed_flags,
552 				     u32 *total_flags,
553 				     u64 multicast)
554 {
555 	/* Not doing much here as of now */
556 	*total_flags &= RSI_SUPP_FILTERS;
557 }
558 
559 /**
560  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
561  *			    (EDCF (aifs, cw_min, cw_max), bursting)
562  *			    for a hardware TX queue.
563  * @hw: Pointer to the ieee80211_hw structure
564  * @vif: Pointer to the ieee80211_vif structure.
565  * @queue: Queue number.
566  * @params: Pointer to ieee80211_tx_queue_params structure.
567  *
568  * Return: 0 on success, negative error code on failure.
569  */
570 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
571 				struct ieee80211_vif *vif, u16 queue,
572 				const struct ieee80211_tx_queue_params *params)
573 {
574 	struct rsi_hw *adapter = hw->priv;
575 	struct rsi_common *common = adapter->priv;
576 	u8 idx = 0;
577 
578 	if (queue >= IEEE80211_NUM_ACS)
579 		return 0;
580 
581 	rsi_dbg(INFO_ZONE,
582 		"%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
583 		__func__, queue, params->aifs,
584 		params->cw_min, params->cw_max, params->txop);
585 
586 	mutex_lock(&common->mutex);
587 	/* Map into the way the f/w expects */
588 	switch (queue) {
589 	case IEEE80211_AC_VO:
590 		idx = VO_Q;
591 		break;
592 	case IEEE80211_AC_VI:
593 		idx = VI_Q;
594 		break;
595 	case IEEE80211_AC_BE:
596 		idx = BE_Q;
597 		break;
598 	case IEEE80211_AC_BK:
599 		idx = BK_Q;
600 		break;
601 	default:
602 		idx = BE_Q;
603 		break;
604 	}
605 
606 	memcpy(&common->edca_params[idx],
607 	       params,
608 	       sizeof(struct ieee80211_tx_queue_params));
609 	mutex_unlock(&common->mutex);
610 
611 	return 0;
612 }
613 
614 /**
615  * rsi_hal_key_config() - This function loads the keys into the firmware.
616  * @hw: Pointer to the ieee80211_hw structure.
617  * @vif: Pointer to the ieee80211_vif structure.
618  * @key: Pointer to the ieee80211_key_conf structure.
619  *
620  * Return: status: 0 on success, -1 on failure.
621  */
622 static int rsi_hal_key_config(struct ieee80211_hw *hw,
623 			      struct ieee80211_vif *vif,
624 			      struct ieee80211_key_conf *key)
625 {
626 	struct rsi_hw *adapter = hw->priv;
627 	int status;
628 	u8 key_type;
629 
630 	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
631 		key_type = RSI_PAIRWISE_KEY;
632 	else
633 		key_type = RSI_GROUP_KEY;
634 
635 	rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
636 		__func__, key->cipher, key_type, key->keylen);
637 
638 	if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
639 	    (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
640 		status = rsi_hal_load_key(adapter->priv,
641 					  key->key,
642 					  key->keylen,
643 					  RSI_PAIRWISE_KEY,
644 					  key->keyidx,
645 					  key->cipher);
646 		if (status)
647 			return status;
648 	}
649 	return rsi_hal_load_key(adapter->priv,
650 				key->key,
651 				key->keylen,
652 				key_type,
653 				key->keyidx,
654 				key->cipher);
655 }
656 
657 /**
658  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
659  * @hw: Pointer to the ieee80211_hw structure.
660  * @cmd: enum set_key_cmd.
661  * @vif: Pointer to the ieee80211_vif structure.
662  * @sta: Pointer to the ieee80211_sta structure.
663  * @key: Pointer to the ieee80211_key_conf structure.
664  *
665  * Return: status: 0 on success, negative error code on failure.
666  */
667 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
668 				enum set_key_cmd cmd,
669 				struct ieee80211_vif *vif,
670 				struct ieee80211_sta *sta,
671 				struct ieee80211_key_conf *key)
672 {
673 	struct rsi_hw *adapter = hw->priv;
674 	struct rsi_common *common = adapter->priv;
675 	struct security_info *secinfo = &common->secinfo;
676 	int status;
677 
678 	mutex_lock(&common->mutex);
679 	switch (cmd) {
680 	case SET_KEY:
681 		secinfo->security_enable = true;
682 		status = rsi_hal_key_config(hw, vif, key);
683 		if (status) {
684 			mutex_unlock(&common->mutex);
685 			return status;
686 		}
687 
688 		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
689 			secinfo->ptk_cipher = key->cipher;
690 		else
691 			secinfo->gtk_cipher = key->cipher;
692 
693 		key->hw_key_idx = key->keyidx;
694 		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
695 
696 		rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
697 		break;
698 
699 	case DISABLE_KEY:
700 		secinfo->security_enable = false;
701 		rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
702 		memset(key, 0, sizeof(struct ieee80211_key_conf));
703 		status = rsi_hal_key_config(hw, vif, key);
704 		break;
705 
706 	default:
707 		status = -EOPNOTSUPP;
708 		break;
709 	}
710 
711 	mutex_unlock(&common->mutex);
712 	return status;
713 }
714 
715 /**
716  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
717  *				 the corresponding mlme_action flag and
718  *				 informs the f/w regarding this.
719  * @hw: Pointer to the ieee80211_hw structure.
720  * @vif: Pointer to the ieee80211_vif structure.
721  * @params: Pointer to A-MPDU action parameters
722  *
723  * Return: status: 0 on success, negative error code on failure.
724  */
725 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
726 				     struct ieee80211_vif *vif,
727 				     struct ieee80211_ampdu_params *params)
728 {
729 	int status = -EOPNOTSUPP;
730 	struct rsi_hw *adapter = hw->priv;
731 	struct rsi_common *common = adapter->priv;
732 	u16 seq_no = 0;
733 	u8 ii = 0;
734 	struct ieee80211_sta *sta = params->sta;
735 	enum ieee80211_ampdu_mlme_action action = params->action;
736 	u16 tid = params->tid;
737 	u16 *ssn = &params->ssn;
738 	u8 buf_size = params->buf_size;
739 
740 	for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
741 		if (vif == adapter->vifs[ii])
742 			break;
743 	}
744 
745 	mutex_lock(&common->mutex);
746 	rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
747 	if (ssn != NULL)
748 		seq_no = *ssn;
749 
750 	switch (action) {
751 	case IEEE80211_AMPDU_RX_START:
752 		status = rsi_send_aggregation_params_frame(common,
753 							   tid,
754 							   seq_no,
755 							   buf_size,
756 							   STA_RX_ADDBA_DONE);
757 		break;
758 
759 	case IEEE80211_AMPDU_RX_STOP:
760 		status = rsi_send_aggregation_params_frame(common,
761 							   tid,
762 							   0,
763 							   buf_size,
764 							   STA_RX_DELBA);
765 		break;
766 
767 	case IEEE80211_AMPDU_TX_START:
768 		common->vif_info[ii].seq_start = seq_no;
769 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
770 		status = 0;
771 		break;
772 
773 	case IEEE80211_AMPDU_TX_STOP_CONT:
774 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
775 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
776 		status = rsi_send_aggregation_params_frame(common,
777 							   tid,
778 							   seq_no,
779 							   buf_size,
780 							   STA_TX_DELBA);
781 		if (!status)
782 			ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
783 		break;
784 
785 	case IEEE80211_AMPDU_TX_OPERATIONAL:
786 		status = rsi_send_aggregation_params_frame(common,
787 							   tid,
788 							   common->vif_info[ii]
789 								.seq_start,
790 							   buf_size,
791 							   STA_TX_ADDBA_DONE);
792 		break;
793 
794 	default:
795 		rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
796 		break;
797 	}
798 
799 	mutex_unlock(&common->mutex);
800 	return status;
801 }
802 
803 /**
804  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
805  * @hw: Pointer to the ieee80211_hw structure.
806  * @value: Rts threshold value.
807  *
808  * Return: 0 on success.
809  */
810 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
811 					  u32 value)
812 {
813 	struct rsi_hw *adapter = hw->priv;
814 	struct rsi_common *common = adapter->priv;
815 
816 	mutex_lock(&common->mutex);
817 	common->rts_threshold = value;
818 	mutex_unlock(&common->mutex);
819 
820 	return 0;
821 }
822 
823 /**
824  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
825  * @hw: Pointer to the ieee80211_hw structure
826  * @vif: Pointer to the ieee80211_vif structure.
827  * @mask: Pointer to the cfg80211_bitrate_mask structure.
828  *
829  * Return: 0 on success.
830  */
831 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
832 				      struct ieee80211_vif *vif,
833 				      const struct cfg80211_bitrate_mask *mask)
834 {
835 	struct rsi_hw *adapter = hw->priv;
836 	struct rsi_common *common = adapter->priv;
837 	enum nl80211_band band = hw->conf.chandef.chan->band;
838 
839 	mutex_lock(&common->mutex);
840 	common->fixedrate_mask[band] = 0;
841 
842 	if (mask->control[band].legacy == 0xfff) {
843 		common->fixedrate_mask[band] =
844 			(mask->control[band].ht_mcs[0] << 12);
845 	} else {
846 		common->fixedrate_mask[band] =
847 			mask->control[band].legacy;
848 	}
849 	mutex_unlock(&common->mutex);
850 
851 	return 0;
852 }
853 
854 /**
855  * rsi_perform_cqm() - This function performs cqm.
856  * @common: Pointer to the driver private structure.
857  * @bssid: pointer to the bssid.
858  * @rssi: RSSI value.
859  */
860 static void rsi_perform_cqm(struct rsi_common *common,
861 			    u8 *bssid,
862 			    s8 rssi)
863 {
864 	struct rsi_hw *adapter = common->priv;
865 	s8 last_event = common->cqm_info.last_cqm_event_rssi;
866 	int thold = common->cqm_info.rssi_thold;
867 	u32 hyst = common->cqm_info.rssi_hyst;
868 	enum nl80211_cqm_rssi_threshold_event event;
869 
870 	if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
871 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
872 	else if (rssi > thold &&
873 		 (last_event == 0 || rssi > (last_event + hyst)))
874 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
875 	else
876 		return;
877 
878 	common->cqm_info.last_cqm_event_rssi = rssi;
879 	rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
880 	ieee80211_cqm_rssi_notify(adapter->vifs[0], event, rssi, GFP_KERNEL);
881 
882 	return;
883 }
884 
885 /**
886  * rsi_fill_rx_status() - This function fills rx status in
887  *			  ieee80211_rx_status structure.
888  * @hw: Pointer to the ieee80211_hw structure.
889  * @skb: Pointer to the socket buffer structure.
890  * @common: Pointer to the driver private structure.
891  * @rxs: Pointer to the ieee80211_rx_status structure.
892  *
893  * Return: None.
894  */
895 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
896 			       struct sk_buff *skb,
897 			       struct rsi_common *common,
898 			       struct ieee80211_rx_status *rxs)
899 {
900 	struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
901 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
902 	struct skb_info *rx_params = (struct skb_info *)info->driver_data;
903 	struct ieee80211_hdr *hdr;
904 	char rssi = rx_params->rssi;
905 	u8 hdrlen = 0;
906 	u8 channel = rx_params->channel;
907 	s32 freq;
908 
909 	hdr = ((struct ieee80211_hdr *)(skb->data));
910 	hdrlen = ieee80211_hdrlen(hdr->frame_control);
911 
912 	memset(info, 0, sizeof(struct ieee80211_tx_info));
913 
914 	rxs->signal = -(rssi);
915 
916 	rxs->band = common->band;
917 
918 	freq = ieee80211_channel_to_frequency(channel, rxs->band);
919 
920 	if (freq)
921 		rxs->freq = freq;
922 
923 	if (ieee80211_has_protected(hdr->frame_control)) {
924 		if (rsi_is_cipher_wep(common)) {
925 			memmove(skb->data + 4, skb->data, hdrlen);
926 			skb_pull(skb, 4);
927 		} else {
928 			memmove(skb->data + 8, skb->data, hdrlen);
929 			skb_pull(skb, 8);
930 			rxs->flag |= RX_FLAG_MMIC_STRIPPED;
931 		}
932 		rxs->flag |= RX_FLAG_DECRYPTED;
933 		rxs->flag |= RX_FLAG_IV_STRIPPED;
934 	}
935 
936 	/* CQM only for connected AP beacons, the RSSI is a weighted avg */
937 	if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
938 		if (ieee80211_is_beacon(hdr->frame_control))
939 			rsi_perform_cqm(common, hdr->addr2, rxs->signal);
940 	}
941 
942 	return;
943 }
944 
945 /**
946  * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
947  * @common: Pointer to the driver private structure.
948  * @skb: Pointer to the socket buffer structure.
949  *
950  * Return: None.
951  */
952 void rsi_indicate_pkt_to_os(struct rsi_common *common,
953 			    struct sk_buff *skb)
954 {
955 	struct rsi_hw *adapter = common->priv;
956 	struct ieee80211_hw *hw = adapter->hw;
957 	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
958 
959 	if ((common->iface_down) || (!adapter->sc_nvifs)) {
960 		dev_kfree_skb(skb);
961 		return;
962 	}
963 
964 	/* filling in the ieee80211_rx_status flags */
965 	rsi_fill_rx_status(hw, skb, common, rx_status);
966 
967 	ieee80211_rx_irqsafe(hw, skb);
968 }
969 
970 static void rsi_set_min_rate(struct ieee80211_hw *hw,
971 			     struct ieee80211_sta *sta,
972 			     struct rsi_common *common)
973 {
974 	u8 band = hw->conf.chandef.chan->band;
975 	u8 ii;
976 	u32 rate_bitmap;
977 	bool matched = false;
978 
979 	common->bitrate_mask[band] = sta->supp_rates[band];
980 
981 	rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
982 
983 	if (rate_bitmap & 0xfff) {
984 		/* Find out the min rate */
985 		for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
986 			if (rate_bitmap & BIT(ii)) {
987 				common->min_rate = rsi_rates[ii].hw_value;
988 				matched = true;
989 				break;
990 			}
991 		}
992 	}
993 
994 	common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
995 
996 	if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
997 		for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
998 			if ((rate_bitmap >> 12) & BIT(ii)) {
999 				common->min_rate = rsi_mcsrates[ii];
1000 				matched = true;
1001 				break;
1002 			}
1003 		}
1004 	}
1005 
1006 	if (!matched)
1007 		common->min_rate = 0xffff;
1008 }
1009 
1010 /**
1011  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1012  *			    connected.
1013  * @hw: pointer to the ieee80211_hw structure.
1014  * @vif: Pointer to the ieee80211_vif structure.
1015  * @sta: Pointer to the ieee80211_sta structure.
1016  *
1017  * Return: 0 on success, -1 on failure.
1018  */
1019 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1020 				struct ieee80211_vif *vif,
1021 				struct ieee80211_sta *sta)
1022 {
1023 	struct rsi_hw *adapter = hw->priv;
1024 	struct rsi_common *common = adapter->priv;
1025 
1026 	mutex_lock(&common->mutex);
1027 
1028 	rsi_set_min_rate(hw, sta, common);
1029 
1030 	if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1031 	    (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) {
1032 		common->vif_info[0].sgi = true;
1033 	}
1034 
1035 	if (sta->ht_cap.ht_supported)
1036 		ieee80211_start_tx_ba_session(sta, 0, 0);
1037 
1038 	mutex_unlock(&common->mutex);
1039 
1040 	return 0;
1041 }
1042 
1043 /**
1044  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1045  *			       getting disconnected.
1046  * @hw: Pointer to the ieee80211_hw structure.
1047  * @vif: Pointer to the ieee80211_vif structure.
1048  * @sta: Pointer to the ieee80211_sta structure.
1049  *
1050  * Return: 0 on success, -1 on failure.
1051  */
1052 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1053 				   struct ieee80211_vif *vif,
1054 				   struct ieee80211_sta *sta)
1055 {
1056 	struct rsi_hw *adapter = hw->priv;
1057 	struct rsi_common *common = adapter->priv;
1058 
1059 	mutex_lock(&common->mutex);
1060 
1061 	/* Resetting all the fields to default values */
1062 	common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1063 	common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1064 	common->min_rate = 0xffff;
1065 	common->vif_info[0].is_ht = false;
1066 	common->vif_info[0].sgi = false;
1067 	common->vif_info[0].seq_start = 0;
1068 	common->secinfo.ptk_cipher = 0;
1069 	common->secinfo.gtk_cipher = 0;
1070 
1071 	rsi_send_rx_filter_frame(common, 0);
1072 
1073 	mutex_unlock(&common->mutex);
1074 
1075 	return 0;
1076 }
1077 
1078 /**
1079  * rsi_mac80211_set_antenna() - This function is used to configure
1080  *				tx and rx antennas.
1081  * @hw: Pointer to the ieee80211_hw structure.
1082  * @tx_ant: Bitmap for tx antenna
1083  * @rx_ant: Bitmap for rx antenna
1084  *
1085  * Return: 0 on success, Negative error code on failure.
1086  */
1087 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1088 				    u32 tx_ant, u32 rx_ant)
1089 {
1090 	struct rsi_hw *adapter = hw->priv;
1091 	struct rsi_common *common = adapter->priv;
1092 	u8 antenna = 0;
1093 
1094 	if (tx_ant > 1 || rx_ant > 1) {
1095 		rsi_dbg(ERR_ZONE,
1096 			"Invalid antenna selection (tx: %d, rx:%d)\n",
1097 			tx_ant, rx_ant);
1098 		rsi_dbg(ERR_ZONE,
1099 			"Use 0 for int_ant, 1 for ext_ant\n");
1100 		return -EINVAL;
1101 	}
1102 
1103 	rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1104 			__func__, tx_ant, rx_ant);
1105 
1106 	mutex_lock(&common->mutex);
1107 
1108 	antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1109 	if (common->ant_in_use != antenna)
1110 		if (rsi_set_antenna(common, antenna))
1111 			goto fail_set_antenna;
1112 
1113 	rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1114 		tx_ant ? "UFL" : "INT");
1115 
1116 	common->ant_in_use = antenna;
1117 
1118 	mutex_unlock(&common->mutex);
1119 
1120 	return 0;
1121 
1122 fail_set_antenna:
1123 	rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1124 	mutex_unlock(&common->mutex);
1125 	return -EINVAL;
1126 }
1127 
1128 /**
1129  * rsi_mac80211_get_antenna() - This function is used to configure
1130  * 				tx and rx antennas.
1131  *
1132  * @hw: Pointer to the ieee80211_hw structure.
1133  * @tx_ant: Bitmap for tx antenna
1134  * @rx_ant: Bitmap for rx antenna
1135  *
1136  * Return: 0 on success, -1 on failure.
1137  */
1138 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1139 				    u32 *tx_ant, u32 *rx_ant)
1140 {
1141 	struct rsi_hw *adapter = hw->priv;
1142 	struct rsi_common *common = adapter->priv;
1143 
1144 	mutex_lock(&common->mutex);
1145 
1146 	*tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1147 	*rx_ant = 0;
1148 
1149 	mutex_unlock(&common->mutex);
1150 
1151 	return 0;
1152 }
1153 
1154 static void rsi_reg_notify(struct wiphy *wiphy,
1155 			   struct regulatory_request *request)
1156 {
1157 	struct ieee80211_supported_band *sband;
1158 	struct ieee80211_channel *ch;
1159 	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1160 	struct rsi_hw * adapter = hw->priv;
1161 	int i;
1162 
1163 	sband = wiphy->bands[NL80211_BAND_5GHZ];
1164 
1165 	for (i = 0; i < sband->n_channels; i++) {
1166 		ch = &sband->channels[i];
1167 		if (ch->flags & IEEE80211_CHAN_DISABLED)
1168 			continue;
1169 
1170 		if (ch->flags & IEEE80211_CHAN_RADAR)
1171 			ch->flags |= IEEE80211_CHAN_NO_IR;
1172 	}
1173 
1174 	rsi_dbg(INFO_ZONE,
1175 		"country = %s dfs_region = %d\n",
1176 		request->alpha2, request->dfs_region);
1177 	adapter->dfs_region = request->dfs_region;
1178 }
1179 
1180 static struct ieee80211_ops mac80211_ops = {
1181 	.tx = rsi_mac80211_tx,
1182 	.start = rsi_mac80211_start,
1183 	.stop = rsi_mac80211_stop,
1184 	.add_interface = rsi_mac80211_add_interface,
1185 	.remove_interface = rsi_mac80211_remove_interface,
1186 	.config = rsi_mac80211_config,
1187 	.bss_info_changed = rsi_mac80211_bss_info_changed,
1188 	.conf_tx = rsi_mac80211_conf_tx,
1189 	.configure_filter = rsi_mac80211_conf_filter,
1190 	.set_key = rsi_mac80211_set_key,
1191 	.set_rts_threshold = rsi_mac80211_set_rts_threshold,
1192 	.set_bitrate_mask = rsi_mac80211_set_rate_mask,
1193 	.ampdu_action = rsi_mac80211_ampdu_action,
1194 	.sta_add = rsi_mac80211_sta_add,
1195 	.sta_remove = rsi_mac80211_sta_remove,
1196 	.set_antenna = rsi_mac80211_set_antenna,
1197 	.get_antenna = rsi_mac80211_get_antenna,
1198 };
1199 
1200 /**
1201  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1202  * @common: Pointer to the driver private structure.
1203  *
1204  * Return: 0 on success, -1 on failure.
1205  */
1206 int rsi_mac80211_attach(struct rsi_common *common)
1207 {
1208 	int status = 0;
1209 	struct ieee80211_hw *hw = NULL;
1210 	struct wiphy *wiphy = NULL;
1211 	struct rsi_hw *adapter = common->priv;
1212 	u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1213 
1214 	rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1215 
1216 	hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1217 	if (!hw) {
1218 		rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1219 		return -ENOMEM;
1220 	}
1221 
1222 	wiphy = hw->wiphy;
1223 
1224 	SET_IEEE80211_DEV(hw, adapter->device);
1225 
1226 	hw->priv = adapter;
1227 	adapter->hw = hw;
1228 
1229 	ieee80211_hw_set(hw, SIGNAL_DBM);
1230 	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1231 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1232 
1233 	hw->queues = MAX_HW_QUEUES;
1234 	hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1235 
1236 	hw->max_rates = 1;
1237 	hw->max_rate_tries = MAX_RETRIES;
1238 
1239 	hw->max_tx_aggregation_subframes = 6;
1240 	rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1241 	rsi_register_rates_channels(adapter, NL80211_BAND_5GHZ);
1242 	hw->rate_control_algorithm = "AARF";
1243 
1244 	SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1245 	ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1246 
1247 	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1248 	wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1249 	wiphy->retry_short = RETRY_SHORT;
1250 	wiphy->retry_long  = RETRY_LONG;
1251 	wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1252 	wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1253 	wiphy->flags = 0;
1254 
1255 	wiphy->available_antennas_rx = 1;
1256 	wiphy->available_antennas_tx = 1;
1257 	wiphy->bands[NL80211_BAND_2GHZ] =
1258 		&adapter->sbands[NL80211_BAND_2GHZ];
1259 	wiphy->bands[NL80211_BAND_5GHZ] =
1260 		&adapter->sbands[NL80211_BAND_5GHZ];
1261 
1262 	wiphy->reg_notifier = rsi_reg_notify;
1263 
1264 	status = ieee80211_register_hw(hw);
1265 	if (status)
1266 		return status;
1267 
1268 	return rsi_init_dbgfs(adapter);
1269 }
1270