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_sdio.h"
21 #include "rsi_common.h"
22 #include "rsi_ps.h"
23 
24 static const struct ieee80211_channel rsi_2ghz_channels[] = {
25 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2412,
26 	  .hw_value = 1 }, /* Channel 1 */
27 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2417,
28 	  .hw_value = 2 }, /* Channel 2 */
29 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2422,
30 	  .hw_value = 3 }, /* Channel 3 */
31 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2427,
32 	  .hw_value = 4 }, /* Channel 4 */
33 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2432,
34 	  .hw_value = 5 }, /* Channel 5 */
35 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2437,
36 	  .hw_value = 6 }, /* Channel 6 */
37 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2442,
38 	  .hw_value = 7 }, /* Channel 7 */
39 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2447,
40 	  .hw_value = 8 }, /* Channel 8 */
41 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2452,
42 	  .hw_value = 9 }, /* Channel 9 */
43 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2457,
44 	  .hw_value = 10 }, /* Channel 10 */
45 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2462,
46 	  .hw_value = 11 }, /* Channel 11 */
47 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2467,
48 	  .hw_value = 12 }, /* Channel 12 */
49 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2472,
50 	  .hw_value = 13 }, /* Channel 13 */
51 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2484,
52 	  .hw_value = 14 }, /* Channel 14 */
53 };
54 
55 static const struct ieee80211_channel rsi_5ghz_channels[] = {
56 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5180,
57 	  .hw_value = 36,  }, /* Channel 36 */
58 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5200,
59 	  .hw_value = 40, }, /* Channel 40 */
60 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5220,
61 	  .hw_value = 44, }, /* Channel 44 */
62 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5240,
63 	  .hw_value = 48, }, /* Channel 48 */
64 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5260,
65 	  .hw_value = 52, }, /* Channel 52 */
66 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5280,
67 	  .hw_value = 56, }, /* Channel 56 */
68 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5300,
69 	  .hw_value = 60, }, /* Channel 60 */
70 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5320,
71 	  .hw_value = 64, }, /* Channel 64 */
72 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5500,
73 	  .hw_value = 100, }, /* Channel 100 */
74 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5520,
75 	  .hw_value = 104, }, /* Channel 104 */
76 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5540,
77 	  .hw_value = 108, }, /* Channel 108 */
78 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5560,
79 	  .hw_value = 112, }, /* Channel 112 */
80 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5580,
81 	  .hw_value = 116, }, /* Channel 116 */
82 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5600,
83 	  .hw_value = 120, }, /* Channel 120 */
84 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5620,
85 	  .hw_value = 124, }, /* Channel 124 */
86 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5640,
87 	  .hw_value = 128, }, /* Channel 128 */
88 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5660,
89 	  .hw_value = 132, }, /* Channel 132 */
90 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5680,
91 	  .hw_value = 136, }, /* Channel 136 */
92 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5700,
93 	  .hw_value = 140, }, /* Channel 140 */
94 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5745,
95 	  .hw_value = 149, }, /* Channel 149 */
96 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5765,
97 	  .hw_value = 153, }, /* Channel 153 */
98 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5785,
99 	  .hw_value = 157, }, /* Channel 157 */
100 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5805,
101 	  .hw_value = 161, }, /* Channel 161 */
102 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5825,
103 	  .hw_value = 165, }, /* Channel 165 */
104 };
105 
106 struct ieee80211_rate rsi_rates[12] = {
107 	{ .bitrate = STD_RATE_01  * 5, .hw_value = RSI_RATE_1 },
108 	{ .bitrate = STD_RATE_02  * 5, .hw_value = RSI_RATE_2 },
109 	{ .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
110 	{ .bitrate = STD_RATE_11  * 5, .hw_value = RSI_RATE_11 },
111 	{ .bitrate = STD_RATE_06  * 5, .hw_value = RSI_RATE_6 },
112 	{ .bitrate = STD_RATE_09  * 5, .hw_value = RSI_RATE_9 },
113 	{ .bitrate = STD_RATE_12  * 5, .hw_value = RSI_RATE_12 },
114 	{ .bitrate = STD_RATE_18  * 5, .hw_value = RSI_RATE_18 },
115 	{ .bitrate = STD_RATE_24  * 5, .hw_value = RSI_RATE_24 },
116 	{ .bitrate = STD_RATE_36  * 5, .hw_value = RSI_RATE_36 },
117 	{ .bitrate = STD_RATE_48  * 5, .hw_value = RSI_RATE_48 },
118 	{ .bitrate = STD_RATE_54  * 5, .hw_value = RSI_RATE_54 },
119 };
120 
121 const u16 rsi_mcsrates[8] = {
122 	RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
123 	RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
124 };
125 
126 static const u32 rsi_max_ap_stas[16] = {
127 	32,	/* 1 - Wi-Fi alone */
128 	0,	/* 2 */
129 	0,	/* 3 */
130 	0,	/* 4 - BT EDR alone */
131 	4,	/* 5 - STA + BT EDR */
132 	32,	/* 6 - AP + BT EDR */
133 	0,	/* 7 */
134 	0,	/* 8 - BT LE alone */
135 	4,	/* 9 - STA + BE LE */
136 	0,	/* 10 */
137 	0,	/* 11 */
138 	0,	/* 12 */
139 	1,	/* 13 - STA + BT Dual */
140 	4,	/* 14 - AP + BT Dual */
141 };
142 
143 static const struct ieee80211_iface_limit rsi_iface_limits[] = {
144 	{
145 		.max = 1,
146 		.types = BIT(NL80211_IFTYPE_STATION),
147 	},
148 	{
149 		.max = 1,
150 		.types = BIT(NL80211_IFTYPE_AP) |
151 			BIT(NL80211_IFTYPE_P2P_CLIENT) |
152 			BIT(NL80211_IFTYPE_P2P_GO),
153 	},
154 	{
155 		.max = 1,
156 		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
157 	},
158 };
159 
160 static const struct ieee80211_iface_combination rsi_iface_combinations[] = {
161 	{
162 		.num_different_channels = 1,
163 		.max_interfaces = 3,
164 		.limits = rsi_iface_limits,
165 		.n_limits = ARRAY_SIZE(rsi_iface_limits),
166 	},
167 };
168 
169 /**
170  * rsi_is_cipher_wep() -  This function determines if the cipher is WEP or not.
171  * @common: Pointer to the driver private structure.
172  *
173  * Return: If cipher type is WEP, a value of 1 is returned, else 0.
174  */
175 
176 bool rsi_is_cipher_wep(struct rsi_common *common)
177 {
178 	if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
179 	     (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
180 	    (!common->secinfo.ptk_cipher))
181 		return true;
182 	else
183 		return false;
184 }
185 
186 /**
187  * rsi_register_rates_channels() - This function registers channels and rates.
188  * @adapter: Pointer to the adapter structure.
189  * @band: Operating band to be set.
190  *
191  * Return: int - 0 on success, negative error on failure.
192  */
193 static int rsi_register_rates_channels(struct rsi_hw *adapter, int band)
194 {
195 	struct ieee80211_supported_band *sbands = &adapter->sbands[band];
196 	void *channels = NULL;
197 
198 	if (band == NL80211_BAND_2GHZ) {
199 		channels = kmemdup(rsi_2ghz_channels, sizeof(rsi_2ghz_channels),
200 				   GFP_KERNEL);
201 		if (!channels)
202 			return -ENOMEM;
203 		sbands->band = NL80211_BAND_2GHZ;
204 		sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
205 		sbands->bitrates = rsi_rates;
206 		sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
207 	} else {
208 		channels = kmemdup(rsi_5ghz_channels, sizeof(rsi_5ghz_channels),
209 				   GFP_KERNEL);
210 		if (!channels)
211 			return -ENOMEM;
212 		sbands->band = NL80211_BAND_5GHZ;
213 		sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
214 		sbands->bitrates = &rsi_rates[4];
215 		sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
216 	}
217 
218 	sbands->channels = channels;
219 
220 	memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
221 	sbands->ht_cap.ht_supported = true;
222 	sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
223 			      IEEE80211_HT_CAP_SGI_20 |
224 			      IEEE80211_HT_CAP_SGI_40);
225 	sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
226 	sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
227 	sbands->ht_cap.mcs.rx_mask[0] = 0xff;
228 	sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
229 	/* sbands->ht_cap.mcs.rx_highest = 0x82; */
230 	return 0;
231 }
232 
233 static int rsi_mac80211_hw_scan_start(struct ieee80211_hw *hw,
234 				      struct ieee80211_vif *vif,
235 				      struct ieee80211_scan_request *hw_req)
236 {
237 	struct cfg80211_scan_request *scan_req = &hw_req->req;
238 	struct rsi_hw *adapter = hw->priv;
239 	struct rsi_common *common = adapter->priv;
240 
241 	rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
242 	common->mac_ops_resumed = false;
243 
244 	if (common->fsm_state != FSM_MAC_INIT_DONE)
245 		return -ENODEV;
246 
247 	if ((common->wow_flags & RSI_WOW_ENABLED) ||
248 	    scan_req->n_channels == 0)
249 		return -EINVAL;
250 
251 	/* Scan already in progress. So return */
252 	if (common->bgscan_en)
253 		return -EBUSY;
254 
255 	/* If STA is not connected, return with special value 1, in order
256 	 * to start sw_scan in mac80211
257 	 */
258 	if (!vif->cfg.assoc)
259 		return 1;
260 
261 	mutex_lock(&common->mutex);
262 	common->hwscan = scan_req;
263 	if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
264 		if (!rsi_send_bgscan_probe_req(common, vif)) {
265 			rsi_dbg(INFO_ZONE, "Background scan started...\n");
266 			common->bgscan_en = true;
267 		}
268 	}
269 	mutex_unlock(&common->mutex);
270 
271 	return 0;
272 }
273 
274 static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
275 					struct ieee80211_vif *vif)
276 {
277 	struct rsi_hw *adapter = hw->priv;
278 	struct rsi_common *common = adapter->priv;
279 	struct cfg80211_scan_info info;
280 
281 	rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
282 	mutex_lock(&common->mutex);
283 
284 	if (common->bgscan_en) {
285 		if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
286 			common->bgscan_en = false;
287 		info.aborted = false;
288 		ieee80211_scan_completed(adapter->hw, &info);
289 		rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
290 	}
291 	common->hwscan = NULL;
292 	mutex_unlock(&common->mutex);
293 }
294 
295 /**
296  * rsi_mac80211_detach() - This function is used to de-initialize the
297  *			   Mac80211 stack.
298  * @adapter: Pointer to the adapter structure.
299  *
300  * Return: None.
301  */
302 void rsi_mac80211_detach(struct rsi_hw *adapter)
303 {
304 	struct ieee80211_hw *hw = adapter->hw;
305 	enum nl80211_band band;
306 
307 	if (hw) {
308 		ieee80211_stop_queues(hw);
309 		ieee80211_unregister_hw(hw);
310 		ieee80211_free_hw(hw);
311 		adapter->hw = NULL;
312 	}
313 
314 	for (band = 0; band < NUM_NL80211_BANDS; band++) {
315 		struct ieee80211_supported_band *sband =
316 					&adapter->sbands[band];
317 
318 		kfree(sband->channels);
319 	}
320 
321 #ifdef CONFIG_RSI_DEBUGFS
322 	rsi_remove_dbgfs(adapter);
323 	kfree(adapter->dfsentry);
324 #endif
325 }
326 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
327 
328 /**
329  * rsi_indicate_tx_status() - This function indicates the transmit status.
330  * @adapter: Pointer to the adapter structure.
331  * @skb: Pointer to the socket buffer structure.
332  * @status: Status
333  *
334  * Return: None.
335  */
336 void rsi_indicate_tx_status(struct rsi_hw *adapter,
337 			    struct sk_buff *skb,
338 			    int status)
339 {
340 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
341 	struct skb_info *tx_params;
342 
343 	if (!adapter->hw) {
344 		rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
345 		return;
346 	}
347 
348 	if (!status)
349 		info->flags |= IEEE80211_TX_STAT_ACK;
350 
351 	tx_params = (struct skb_info *)info->driver_data;
352 	skb_pull(skb, tx_params->internal_hdr_size);
353 	memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
354 
355 	ieee80211_tx_status_irqsafe(adapter->hw, skb);
356 }
357 
358 /**
359  * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
360  *		       transmitted frame.SKB contains the buffer starting
361  *		       from the IEEE 802.11 header.
362  * @hw: Pointer to the ieee80211_hw structure.
363  * @control: Pointer to the ieee80211_tx_control structure
364  * @skb: Pointer to the socket buffer structure.
365  *
366  * Return: None
367  */
368 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
369 			    struct ieee80211_tx_control *control,
370 			    struct sk_buff *skb)
371 {
372 	struct rsi_hw *adapter = hw->priv;
373 	struct rsi_common *common = adapter->priv;
374 	struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
375 
376 	if (ieee80211_is_auth(wlh->frame_control))
377 		common->mac_ops_resumed = false;
378 
379 	rsi_core_xmit(common, skb);
380 }
381 
382 /**
383  * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
384  *			  the driver init is complete by then, just
385  *			  returns success.
386  * @hw: Pointer to the ieee80211_hw structure.
387  *
388  * Return: 0 as success.
389  */
390 static int rsi_mac80211_start(struct ieee80211_hw *hw)
391 {
392 	struct rsi_hw *adapter = hw->priv;
393 	struct rsi_common *common = adapter->priv;
394 
395 	rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
396 	mutex_lock(&common->mutex);
397 	if (common->hibernate_resume) {
398 		common->reinit_hw = true;
399 		adapter->host_intf_ops->reinit_device(adapter);
400 		wait_for_completion(&adapter->priv->wlan_init_completion);
401 	}
402 	common->iface_down = false;
403 	wiphy_rfkill_start_polling(hw->wiphy);
404 	rsi_send_rx_filter_frame(common, 0);
405 	mutex_unlock(&common->mutex);
406 
407 	return 0;
408 }
409 
410 /**
411  * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
412  * @hw: Pointer to the ieee80211_hw structure.
413  *
414  * Return: None.
415  */
416 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
417 {
418 	struct rsi_hw *adapter = hw->priv;
419 	struct rsi_common *common = adapter->priv;
420 
421 	rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
422 	mutex_lock(&common->mutex);
423 	common->iface_down = true;
424 	wiphy_rfkill_stop_polling(hw->wiphy);
425 
426 	/* Block all rx frames */
427 	rsi_send_rx_filter_frame(common, 0xffff);
428 
429 	mutex_unlock(&common->mutex);
430 }
431 
432 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
433 {
434 	switch (vif_type) {
435 	case NL80211_IFTYPE_STATION:
436 		return RSI_OPMODE_STA;
437 	case NL80211_IFTYPE_AP:
438 		return RSI_OPMODE_AP;
439 	case NL80211_IFTYPE_P2P_DEVICE:
440 		return RSI_OPMODE_P2P_CLIENT;
441 	case NL80211_IFTYPE_P2P_CLIENT:
442 		return RSI_OPMODE_P2P_CLIENT;
443 	case NL80211_IFTYPE_P2P_GO:
444 		return RSI_OPMODE_P2P_GO;
445 	default:
446 		return RSI_OPMODE_UNSUPPORTED;
447 	}
448 }
449 
450 /**
451  * rsi_mac80211_add_interface() - This function is called when a netdevice
452  *				  attached to the hardware is enabled.
453  * @hw: Pointer to the ieee80211_hw structure.
454  * @vif: Pointer to the ieee80211_vif structure.
455  *
456  * Return: ret: 0 on success, negative error code on failure.
457  */
458 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
459 				      struct ieee80211_vif *vif)
460 {
461 	struct rsi_hw *adapter = hw->priv;
462 	struct rsi_common *common = adapter->priv;
463 	struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
464 	enum opmode intf_mode;
465 	enum vap_status vap_status;
466 	int vap_idx = -1, i;
467 
468 	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
469 	mutex_lock(&common->mutex);
470 
471 	intf_mode = rsi_map_intf_mode(vif->type);
472 	if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
473 		rsi_dbg(ERR_ZONE,
474 			"%s: Interface type %d not supported\n", __func__,
475 			vif->type);
476 		mutex_unlock(&common->mutex);
477 		return -EOPNOTSUPP;
478 	}
479 	if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
480 	    (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
481 	    (vif->type == NL80211_IFTYPE_P2P_GO))
482 		common->p2p_enabled = true;
483 
484 	/* Get free vap index */
485 	for (i = 0; i < RSI_MAX_VIFS; i++) {
486 		if (!adapter->vifs[i] ||
487 		    !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
488 			vap_idx = i;
489 			break;
490 		}
491 	}
492 	if (vap_idx < 0) {
493 		rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
494 		mutex_unlock(&common->mutex);
495 		return -EOPNOTSUPP;
496 	}
497 	vif_info->vap_id = vap_idx;
498 	adapter->vifs[vap_idx] = vif;
499 	adapter->sc_nvifs++;
500 	vap_status = VAP_ADD;
501 
502 	if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
503 				     vif_info->vap_id, vap_status)) {
504 		rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
505 		mutex_unlock(&common->mutex);
506 		return -EINVAL;
507 	}
508 
509 	if ((vif->type == NL80211_IFTYPE_AP) ||
510 	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
511 		rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
512 		for (i = 0; i < common->max_stations; i++)
513 			common->stations[i].sta = NULL;
514 	}
515 
516 	mutex_unlock(&common->mutex);
517 
518 	return 0;
519 }
520 
521 /**
522  * rsi_mac80211_remove_interface() - This function notifies driver that an
523  *				     interface is going down.
524  * @hw: Pointer to the ieee80211_hw structure.
525  * @vif: Pointer to the ieee80211_vif structure.
526  *
527  * Return: None.
528  */
529 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
530 					  struct ieee80211_vif *vif)
531 {
532 	struct rsi_hw *adapter = hw->priv;
533 	struct rsi_common *common = adapter->priv;
534 	enum opmode opmode;
535 	int i;
536 
537 	rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
538 
539 	mutex_lock(&common->mutex);
540 
541 	if (adapter->sc_nvifs <= 0) {
542 		mutex_unlock(&common->mutex);
543 		return;
544 	}
545 
546 	opmode = rsi_map_intf_mode(vif->type);
547 	if (opmode == RSI_OPMODE_UNSUPPORTED) {
548 		rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
549 		mutex_unlock(&common->mutex);
550 		return;
551 	}
552 	for (i = 0; i < RSI_MAX_VIFS; i++) {
553 		if (!adapter->vifs[i])
554 			continue;
555 		if (vif == adapter->vifs[i]) {
556 			rsi_set_vap_capabilities(common, opmode, vif->addr,
557 						 i, VAP_DELETE);
558 			adapter->sc_nvifs--;
559 			adapter->vifs[i] = NULL;
560 		}
561 	}
562 	mutex_unlock(&common->mutex);
563 }
564 
565 /**
566  * rsi_channel_change() - This function is a performs the checks
567  *			  required for changing a channel and sets
568  *			  the channel accordingly.
569  * @hw: Pointer to the ieee80211_hw structure.
570  *
571  * Return: 0 on success, negative error code on failure.
572  */
573 static int rsi_channel_change(struct ieee80211_hw *hw)
574 {
575 	struct rsi_hw *adapter = hw->priv;
576 	struct rsi_common *common = adapter->priv;
577 	int status = -EOPNOTSUPP;
578 	struct ieee80211_channel *curchan = hw->conf.chandef.chan;
579 	u16 channel = curchan->hw_value;
580 	struct ieee80211_vif *vif;
581 	bool assoc = false;
582 	int i;
583 
584 	rsi_dbg(INFO_ZONE,
585 		"%s: Set channel: %d MHz type: %d channel_no %d\n",
586 		__func__, curchan->center_freq,
587 		curchan->flags, channel);
588 
589 	for (i = 0; i < RSI_MAX_VIFS; i++) {
590 		vif = adapter->vifs[i];
591 		if (!vif)
592 			continue;
593 		if (vif->type == NL80211_IFTYPE_STATION) {
594 			if (vif->cfg.assoc) {
595 				assoc = true;
596 				break;
597 			}
598 		}
599 	}
600 	if (assoc) {
601 		if (!common->hw_data_qs_blocked &&
602 		    (rsi_get_connected_channel(vif) != channel)) {
603 			rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
604 			if (!rsi_send_block_unblock_frame(common, true))
605 				common->hw_data_qs_blocked = true;
606 		}
607 	}
608 
609 	status = rsi_band_check(common, curchan);
610 	if (!status)
611 		status = rsi_set_channel(adapter->priv, curchan);
612 
613 	if (assoc) {
614 		if (common->hw_data_qs_blocked &&
615 		    (rsi_get_connected_channel(vif) == channel)) {
616 			rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
617 			if (!rsi_send_block_unblock_frame(common, false))
618 				common->hw_data_qs_blocked = false;
619 		}
620 	}
621 
622 	return status;
623 }
624 
625 /**
626  * rsi_config_power() - This function configures tx power to device
627  * @hw: Pointer to the ieee80211_hw structure.
628  *
629  * Return: 0 on success, negative error code on failure.
630  */
631 static int rsi_config_power(struct ieee80211_hw *hw)
632 {
633 	struct rsi_hw *adapter = hw->priv;
634 	struct rsi_common *common = adapter->priv;
635 	struct ieee80211_conf *conf = &hw->conf;
636 
637 	if (adapter->sc_nvifs <= 0) {
638 		rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
639 		return -EINVAL;
640 	}
641 
642 	rsi_dbg(INFO_ZONE,
643 		"%s: Set tx power: %d dBM\n", __func__, conf->power_level);
644 
645 	if (conf->power_level == common->tx_power)
646 		return 0;
647 
648 	common->tx_power = conf->power_level;
649 
650 	return rsi_send_radio_params_update(common);
651 }
652 
653 /**
654  * rsi_mac80211_config() - This function is a handler for configuration
655  *			   requests. The stack calls this function to
656  *			   change hardware configuration, e.g., channel.
657  * @hw: Pointer to the ieee80211_hw structure.
658  * @changed: Changed flags set.
659  *
660  * Return: 0 on success, negative error code on failure.
661  */
662 static int rsi_mac80211_config(struct ieee80211_hw *hw,
663 			       u32 changed)
664 {
665 	struct rsi_hw *adapter = hw->priv;
666 	struct rsi_common *common = adapter->priv;
667 	struct ieee80211_conf *conf = &hw->conf;
668 	int status = -EOPNOTSUPP;
669 
670 	mutex_lock(&common->mutex);
671 
672 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
673 		status = rsi_channel_change(hw);
674 
675 	/* tx power */
676 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
677 		rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
678 		status = rsi_config_power(hw);
679 	}
680 
681 	/* Power save parameters */
682 	if ((changed & IEEE80211_CONF_CHANGE_PS) &&
683 	    !common->mac_ops_resumed) {
684 		struct ieee80211_vif *vif, *sta_vif = NULL;
685 		unsigned long flags;
686 		int i, set_ps = 1;
687 
688 		for (i = 0; i < RSI_MAX_VIFS; i++) {
689 			vif = adapter->vifs[i];
690 			if (!vif)
691 				continue;
692 			/* Don't go to power save if AP vap exists */
693 			if ((vif->type == NL80211_IFTYPE_AP) ||
694 			    (vif->type == NL80211_IFTYPE_P2P_GO)) {
695 				set_ps = 0;
696 				break;
697 			}
698 			if ((vif->type == NL80211_IFTYPE_STATION ||
699 			     vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
700 			    (!sta_vif || vif->cfg.assoc))
701 				sta_vif = vif;
702 		}
703 		if (set_ps && sta_vif) {
704 			spin_lock_irqsave(&adapter->ps_lock, flags);
705 			if (conf->flags & IEEE80211_CONF_PS)
706 				rsi_enable_ps(adapter, sta_vif);
707 			else
708 				rsi_disable_ps(adapter, sta_vif);
709 			spin_unlock_irqrestore(&adapter->ps_lock, flags);
710 		}
711 	}
712 
713 	/* RTS threshold */
714 	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
715 		rsi_dbg(INFO_ZONE, "RTS threshold\n");
716 		if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
717 			rsi_dbg(INFO_ZONE,
718 				"%s: Sending vap updates....\n", __func__);
719 			status = rsi_send_vap_dynamic_update(common);
720 		}
721 	}
722 	mutex_unlock(&common->mutex);
723 
724 	return status;
725 }
726 
727 /**
728  * rsi_get_connected_channel() - This function is used to get the current
729  *				 connected channel number.
730  * @vif: Pointer to the ieee80211_vif structure.
731  *
732  * Return: Current connected AP's channel number is returned.
733  */
734 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
735 {
736 	struct ieee80211_bss_conf *bss;
737 	struct ieee80211_channel *channel;
738 
739 	if (!vif)
740 		return 0;
741 
742 	bss = &vif->bss_conf;
743 	channel = bss->chandef.chan;
744 
745 	if (!channel)
746 		return 0;
747 
748 	return channel->hw_value;
749 }
750 
751 static void rsi_switch_channel(struct rsi_hw *adapter,
752 			       struct ieee80211_vif *vif)
753 {
754 	struct rsi_common *common = adapter->priv;
755 	struct ieee80211_channel *channel;
756 
757 	if (common->iface_down)
758 		return;
759 	if (!vif)
760 		return;
761 
762 	channel = vif->bss_conf.chandef.chan;
763 
764 	if (!channel)
765 		return;
766 
767 	rsi_band_check(common, channel);
768 	rsi_set_channel(common, channel);
769 	rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
770 }
771 
772 /**
773  * rsi_mac80211_bss_info_changed() - This function is a handler for config
774  *				     requests related to BSS parameters that
775  *				     may vary during BSS's lifespan.
776  * @hw: Pointer to the ieee80211_hw structure.
777  * @vif: Pointer to the ieee80211_vif structure.
778  * @bss_conf: Pointer to the ieee80211_bss_conf structure.
779  * @changed: Changed flags set.
780  *
781  * Return: None.
782  */
783 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
784 					  struct ieee80211_vif *vif,
785 					  struct ieee80211_bss_conf *bss_conf,
786 					  u64 changed)
787 {
788 	struct rsi_hw *adapter = hw->priv;
789 	struct rsi_common *common = adapter->priv;
790 	struct ieee80211_bss_conf *bss = &vif->bss_conf;
791 	struct ieee80211_conf *conf = &hw->conf;
792 	u16 rx_filter_word = 0;
793 
794 	mutex_lock(&common->mutex);
795 	if (changed & BSS_CHANGED_ASSOC) {
796 		rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
797 			__func__, vif->cfg.assoc);
798 		if (vif->cfg.assoc) {
799 			/* Send the RX filter frame */
800 			rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
801 					  ALLOW_CTRL_ASSOC_PEER |
802 					  ALLOW_MGMT_ASSOC_PEER);
803 			rsi_send_rx_filter_frame(common, rx_filter_word);
804 		}
805 		rsi_inform_bss_status(common,
806 				      RSI_OPMODE_STA,
807 				      vif->cfg.assoc,
808 				      bss_conf->bssid,
809 				      bss_conf->qos,
810 				      vif->cfg.aid,
811 				      NULL, 0,
812 				      bss_conf->assoc_capability, vif);
813 		adapter->ps_info.dtim_interval_duration = bss->dtim_period;
814 		adapter->ps_info.listen_interval = conf->listen_interval;
815 
816 		/* If U-APSD is updated, send ps parameters to firmware */
817 		if (vif->cfg.assoc) {
818 			if (common->uapsd_bitmap) {
819 				rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
820 				rsi_conf_uapsd(adapter, vif);
821 			}
822 		} else {
823 			common->uapsd_bitmap = 0;
824 		}
825 	}
826 
827 	if (changed & BSS_CHANGED_CQM) {
828 		common->cqm_info.last_cqm_event_rssi = 0;
829 		common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
830 		common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
831 		rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
832 			common->cqm_info.rssi_thold,
833 			common->cqm_info.rssi_hyst);
834 	}
835 
836 	if (changed & BSS_CHANGED_BEACON_INT) {
837 		rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
838 			__func__, bss_conf->beacon_int);
839 		if (common->beacon_interval != bss->beacon_int) {
840 			common->beacon_interval = bss->beacon_int;
841 			if (vif->type == NL80211_IFTYPE_AP) {
842 				struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
843 
844 				rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
845 							 vif->addr, vif_info->vap_id,
846 							 VAP_UPDATE);
847 			}
848 		}
849 		adapter->ps_info.listen_interval =
850 			bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
851 	}
852 
853 	if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
854 	    ((vif->type == NL80211_IFTYPE_AP) ||
855 	     (vif->type == NL80211_IFTYPE_P2P_GO))) {
856 		if (bss->enable_beacon) {
857 			rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
858 			common->beacon_enabled = 1;
859 		} else {
860 			rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
861 			common->beacon_enabled = 0;
862 		}
863 	}
864 
865 	mutex_unlock(&common->mutex);
866 }
867 
868 /**
869  * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
870  * @hw: Pointer to the ieee80211_hw structure.
871  * @changed_flags: Changed flags set.
872  * @total_flags: Total initial flags set.
873  * @multicast: Multicast.
874  *
875  * Return: None.
876  */
877 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
878 				     u32 changed_flags,
879 				     u32 *total_flags,
880 				     u64 multicast)
881 {
882 	/* Not doing much here as of now */
883 	*total_flags &= RSI_SUPP_FILTERS;
884 }
885 
886 /**
887  * rsi_mac80211_conf_tx() - This function configures TX queue parameters
888  *			    (EDCF (aifs, cw_min, cw_max), bursting)
889  *			    for a hardware TX queue.
890  * @hw: Pointer to the ieee80211_hw structure
891  * @vif: Pointer to the ieee80211_vif structure.
892  * @link_id: the link ID if MLO is used, otherwise 0
893  * @queue: Queue number.
894  * @params: Pointer to ieee80211_tx_queue_params structure.
895  *
896  * Return: 0 on success, negative error code on failure.
897  */
898 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
899 				struct ieee80211_vif *vif,
900 				unsigned int link_id, u16 queue,
901 				const struct ieee80211_tx_queue_params *params)
902 {
903 	struct rsi_hw *adapter = hw->priv;
904 	struct rsi_common *common = adapter->priv;
905 	u8 idx = 0;
906 
907 	if (queue >= IEEE80211_NUM_ACS)
908 		return 0;
909 
910 	rsi_dbg(INFO_ZONE,
911 		"%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
912 		__func__, queue, params->aifs,
913 		params->cw_min, params->cw_max, params->txop);
914 
915 	mutex_lock(&common->mutex);
916 	/* Map into the way the f/w expects */
917 	switch (queue) {
918 	case IEEE80211_AC_VO:
919 		idx = VO_Q;
920 		break;
921 	case IEEE80211_AC_VI:
922 		idx = VI_Q;
923 		break;
924 	case IEEE80211_AC_BE:
925 		idx = BE_Q;
926 		break;
927 	case IEEE80211_AC_BK:
928 		idx = BK_Q;
929 		break;
930 	default:
931 		idx = BE_Q;
932 		break;
933 	}
934 
935 	memcpy(&common->edca_params[idx],
936 	       params,
937 	       sizeof(struct ieee80211_tx_queue_params));
938 
939 	if (params->uapsd)
940 		common->uapsd_bitmap |= idx;
941 	else
942 		common->uapsd_bitmap &= (~idx);
943 
944 	mutex_unlock(&common->mutex);
945 
946 	return 0;
947 }
948 
949 /**
950  * rsi_hal_key_config() - This function loads the keys into the firmware.
951  * @hw: Pointer to the ieee80211_hw structure.
952  * @vif: Pointer to the ieee80211_vif structure.
953  * @key: Pointer to the ieee80211_key_conf structure.
954  * @sta: Pointer to the ieee80211_sta structure.
955  *
956  * Return: status: 0 on success, negative error codes on failure.
957  */
958 static int rsi_hal_key_config(struct ieee80211_hw *hw,
959 			      struct ieee80211_vif *vif,
960 			      struct ieee80211_key_conf *key,
961 			      struct ieee80211_sta *sta)
962 {
963 	struct rsi_hw *adapter = hw->priv;
964 	struct rsi_sta *rsta = NULL;
965 	int status;
966 	u8 key_type;
967 	s16 sta_id = 0;
968 
969 	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
970 		key_type = RSI_PAIRWISE_KEY;
971 	else
972 		key_type = RSI_GROUP_KEY;
973 
974 	rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
975 		__func__, key->cipher, key_type, key->keylen);
976 
977 	if ((vif->type == NL80211_IFTYPE_AP) ||
978 	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
979 		if (sta) {
980 			rsta = rsi_find_sta(adapter->priv, sta->addr);
981 			if (rsta)
982 				sta_id = rsta->sta_id;
983 		}
984 		adapter->priv->key = key;
985 	} else {
986 		if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
987 		    (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
988 			status = rsi_hal_load_key(adapter->priv,
989 						  key->key,
990 						  key->keylen,
991 						  RSI_PAIRWISE_KEY,
992 						  key->keyidx,
993 						  key->cipher,
994 						  sta_id,
995 						  vif);
996 			if (status)
997 				return status;
998 		}
999 	}
1000 
1001 	status = rsi_hal_load_key(adapter->priv,
1002 				  key->key,
1003 				  key->keylen,
1004 				  key_type,
1005 				  key->keyidx,
1006 				  key->cipher,
1007 				  sta_id,
1008 				  vif);
1009 	if (status)
1010 		return status;
1011 
1012 	if (vif->type == NL80211_IFTYPE_STATION &&
1013 	    (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1014 	     key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1015 		if (!rsi_send_block_unblock_frame(adapter->priv, false))
1016 			adapter->priv->hw_data_qs_blocked = false;
1017 	}
1018 
1019 	return 0;
1020 }
1021 
1022 /**
1023  * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1024  * @hw: Pointer to the ieee80211_hw structure.
1025  * @cmd: enum set_key_cmd.
1026  * @vif: Pointer to the ieee80211_vif structure.
1027  * @sta: Pointer to the ieee80211_sta structure.
1028  * @key: Pointer to the ieee80211_key_conf structure.
1029  *
1030  * Return: status: 0 on success, negative error code on failure.
1031  */
1032 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1033 				enum set_key_cmd cmd,
1034 				struct ieee80211_vif *vif,
1035 				struct ieee80211_sta *sta,
1036 				struct ieee80211_key_conf *key)
1037 {
1038 	struct rsi_hw *adapter = hw->priv;
1039 	struct rsi_common *common = adapter->priv;
1040 	struct security_info *secinfo = &common->secinfo;
1041 	int status;
1042 
1043 	mutex_lock(&common->mutex);
1044 	switch (cmd) {
1045 	case SET_KEY:
1046 		status = rsi_hal_key_config(hw, vif, key, sta);
1047 		if (status) {
1048 			mutex_unlock(&common->mutex);
1049 			return status;
1050 		}
1051 
1052 		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1053 			secinfo->ptk_cipher = key->cipher;
1054 		else
1055 			secinfo->gtk_cipher = key->cipher;
1056 
1057 		key->hw_key_idx = key->keyidx;
1058 		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1059 
1060 		rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1061 		break;
1062 
1063 	case DISABLE_KEY:
1064 		rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1065 		memset(key, 0, sizeof(struct ieee80211_key_conf));
1066 		status = rsi_hal_key_config(hw, vif, key, sta);
1067 		break;
1068 
1069 	default:
1070 		status = -EOPNOTSUPP;
1071 		break;
1072 	}
1073 
1074 	mutex_unlock(&common->mutex);
1075 	return status;
1076 }
1077 
1078 /**
1079  * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1080  *				 the corresponding mlme_action flag and
1081  *				 informs the f/w regarding this.
1082  * @hw: Pointer to the ieee80211_hw structure.
1083  * @vif: Pointer to the ieee80211_vif structure.
1084  * @params: Pointer to A-MPDU action parameters
1085  *
1086  * Return: status: 0 on success, negative error code on failure.
1087  */
1088 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1089 				     struct ieee80211_vif *vif,
1090 				     struct ieee80211_ampdu_params *params)
1091 {
1092 	int status = -EOPNOTSUPP;
1093 	struct rsi_hw *adapter = hw->priv;
1094 	struct rsi_common *common = adapter->priv;
1095 	struct rsi_sta *rsta = NULL;
1096 	u16 seq_no = 0, seq_start = 0;
1097 	u8 ii = 0;
1098 	struct ieee80211_sta *sta = params->sta;
1099 	u8 sta_id = 0;
1100 	enum ieee80211_ampdu_mlme_action action = params->action;
1101 	u16 tid = params->tid;
1102 	u16 *ssn = &params->ssn;
1103 	u8 buf_size = params->buf_size;
1104 
1105 	for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1106 		if (vif == adapter->vifs[ii])
1107 			break;
1108 	}
1109 
1110 	if (ii >= RSI_MAX_VIFS)
1111 		return status;
1112 
1113 	mutex_lock(&common->mutex);
1114 
1115 	if (ssn != NULL)
1116 		seq_no = *ssn;
1117 
1118 	if ((vif->type == NL80211_IFTYPE_AP) ||
1119 	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1120 		rsta = rsi_find_sta(common, sta->addr);
1121 		if (!rsta) {
1122 			rsi_dbg(ERR_ZONE, "No station mapped\n");
1123 			status = 0;
1124 			goto unlock;
1125 		}
1126 		sta_id = rsta->sta_id;
1127 	}
1128 
1129 	rsi_dbg(INFO_ZONE,
1130 		"%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1131 		__func__, tid, seq_no, buf_size, sta_id);
1132 
1133 	switch (action) {
1134 	case IEEE80211_AMPDU_RX_START:
1135 		status = rsi_send_aggregation_params_frame(common,
1136 							   tid,
1137 							   seq_no,
1138 							   buf_size,
1139 							   STA_RX_ADDBA_DONE,
1140 							   sta_id);
1141 		break;
1142 
1143 	case IEEE80211_AMPDU_RX_STOP:
1144 		status = rsi_send_aggregation_params_frame(common,
1145 							   tid,
1146 							   0,
1147 							   buf_size,
1148 							   STA_RX_DELBA,
1149 							   sta_id);
1150 		break;
1151 
1152 	case IEEE80211_AMPDU_TX_START:
1153 		if ((vif->type == NL80211_IFTYPE_STATION) ||
1154 		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1155 			common->vif_info[ii].seq_start = seq_no;
1156 		else if ((vif->type == NL80211_IFTYPE_AP) ||
1157 			 (vif->type == NL80211_IFTYPE_P2P_GO))
1158 			rsta->seq_start[tid] = seq_no;
1159 		status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1160 		break;
1161 
1162 	case IEEE80211_AMPDU_TX_STOP_CONT:
1163 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
1164 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1165 		status = rsi_send_aggregation_params_frame(common,
1166 							   tid,
1167 							   seq_no,
1168 							   buf_size,
1169 							   STA_TX_DELBA,
1170 							   sta_id);
1171 		if (!status)
1172 			ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1173 		break;
1174 
1175 	case IEEE80211_AMPDU_TX_OPERATIONAL:
1176 		if ((vif->type == NL80211_IFTYPE_STATION) ||
1177 		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1178 			seq_start = common->vif_info[ii].seq_start;
1179 		else if ((vif->type == NL80211_IFTYPE_AP) ||
1180 			 (vif->type == NL80211_IFTYPE_P2P_GO))
1181 			seq_start = rsta->seq_start[tid];
1182 		status = rsi_send_aggregation_params_frame(common,
1183 							   tid,
1184 							   seq_start,
1185 							   buf_size,
1186 							   STA_TX_ADDBA_DONE,
1187 							   sta_id);
1188 		break;
1189 
1190 	default:
1191 		rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1192 		break;
1193 	}
1194 
1195 unlock:
1196 	mutex_unlock(&common->mutex);
1197 	return status;
1198 }
1199 
1200 /**
1201  * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1202  * @hw: Pointer to the ieee80211_hw structure.
1203  * @value: Rts threshold value.
1204  *
1205  * Return: 0 on success.
1206  */
1207 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1208 					  u32 value)
1209 {
1210 	struct rsi_hw *adapter = hw->priv;
1211 	struct rsi_common *common = adapter->priv;
1212 
1213 	mutex_lock(&common->mutex);
1214 	common->rts_threshold = value;
1215 	mutex_unlock(&common->mutex);
1216 
1217 	return 0;
1218 }
1219 
1220 /**
1221  * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1222  * @hw: Pointer to the ieee80211_hw structure
1223  * @vif: Pointer to the ieee80211_vif structure.
1224  * @mask: Pointer to the cfg80211_bitrate_mask structure.
1225  *
1226  * Return: 0 on success.
1227  */
1228 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1229 				      struct ieee80211_vif *vif,
1230 				      const struct cfg80211_bitrate_mask *mask)
1231 {
1232 	const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1233 	struct rsi_hw *adapter = hw->priv;
1234 	struct rsi_common *common = adapter->priv;
1235 	int i;
1236 
1237 	mutex_lock(&common->mutex);
1238 
1239 	for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1240 		struct rsi_rate_config *cfg = &common->rate_config[i];
1241 		u32 bm;
1242 
1243 		bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1244 		if (hweight32(bm) == 1) { /* single rate */
1245 			int rate_index = ffs(bm) - 1;
1246 
1247 			if (rate_index < mcs_offset)
1248 				cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1249 			else
1250 				cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1251 			cfg->fixed_enabled = true;
1252 		} else {
1253 			cfg->configured_mask = bm;
1254 			cfg->fixed_enabled = false;
1255 		}
1256 	}
1257 
1258 	mutex_unlock(&common->mutex);
1259 
1260 	return 0;
1261 }
1262 
1263 /**
1264  * rsi_perform_cqm() - This function performs cqm.
1265  * @common: Pointer to the driver private structure.
1266  * @bssid: pointer to the bssid.
1267  * @rssi: RSSI value.
1268  * @vif: Pointer to the ieee80211_vif structure.
1269  */
1270 static void rsi_perform_cqm(struct rsi_common *common,
1271 			    u8 *bssid,
1272 			    s8 rssi,
1273 			    struct ieee80211_vif *vif)
1274 {
1275 	s8 last_event = common->cqm_info.last_cqm_event_rssi;
1276 	int thold = common->cqm_info.rssi_thold;
1277 	u32 hyst = common->cqm_info.rssi_hyst;
1278 	enum nl80211_cqm_rssi_threshold_event event;
1279 
1280 	if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1281 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1282 	else if (rssi > thold &&
1283 		 (last_event == 0 || rssi > (last_event + hyst)))
1284 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1285 	else
1286 		return;
1287 
1288 	common->cqm_info.last_cqm_event_rssi = rssi;
1289 	rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1290 	ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1291 
1292 	return;
1293 }
1294 
1295 /**
1296  * rsi_fill_rx_status() - This function fills rx status in
1297  *			  ieee80211_rx_status structure.
1298  * @hw: Pointer to the ieee80211_hw structure.
1299  * @skb: Pointer to the socket buffer structure.
1300  * @common: Pointer to the driver private structure.
1301  * @rxs: Pointer to the ieee80211_rx_status structure.
1302  *
1303  * Return: None.
1304  */
1305 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1306 			       struct sk_buff *skb,
1307 			       struct rsi_common *common,
1308 			       struct ieee80211_rx_status *rxs)
1309 {
1310 	struct rsi_hw *adapter = common->priv;
1311 	struct ieee80211_vif *vif;
1312 	struct ieee80211_bss_conf *bss = NULL;
1313 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1314 	struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1315 	struct ieee80211_hdr *hdr;
1316 	char rssi = rx_params->rssi;
1317 	u8 hdrlen = 0;
1318 	u8 channel = rx_params->channel;
1319 	s32 freq;
1320 	int i;
1321 
1322 	hdr = ((struct ieee80211_hdr *)(skb->data));
1323 	hdrlen = ieee80211_hdrlen(hdr->frame_control);
1324 
1325 	memset(info, 0, sizeof(struct ieee80211_tx_info));
1326 
1327 	rxs->signal = -(rssi);
1328 
1329 	rxs->band = common->band;
1330 
1331 	freq = ieee80211_channel_to_frequency(channel, rxs->band);
1332 
1333 	if (freq)
1334 		rxs->freq = freq;
1335 
1336 	if (ieee80211_has_protected(hdr->frame_control)) {
1337 		if (rsi_is_cipher_wep(common)) {
1338 			memmove(skb->data + 4, skb->data, hdrlen);
1339 			skb_pull(skb, 4);
1340 		} else {
1341 			memmove(skb->data + 8, skb->data, hdrlen);
1342 			skb_pull(skb, 8);
1343 			rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1344 		}
1345 		rxs->flag |= RX_FLAG_DECRYPTED;
1346 		rxs->flag |= RX_FLAG_IV_STRIPPED;
1347 	}
1348 
1349 	for (i = 0; i < RSI_MAX_VIFS; i++) {
1350 		vif = adapter->vifs[i];
1351 		if (!vif)
1352 			continue;
1353 		if (vif->type == NL80211_IFTYPE_STATION) {
1354 			bss = &vif->bss_conf;
1355 			break;
1356 		}
1357 	}
1358 	if (!bss)
1359 		return;
1360 	/* CQM only for connected AP beacons, the RSSI is a weighted avg */
1361 	if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1362 		if (ieee80211_is_beacon(hdr->frame_control))
1363 			rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1364 	}
1365 
1366 	return;
1367 }
1368 
1369 /**
1370  * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1371  * @common: Pointer to the driver private structure.
1372  * @skb: Pointer to the socket buffer structure.
1373  *
1374  * Return: None.
1375  */
1376 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1377 			    struct sk_buff *skb)
1378 {
1379 	struct rsi_hw *adapter = common->priv;
1380 	struct ieee80211_hw *hw = adapter->hw;
1381 	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1382 
1383 	if ((common->iface_down) || (!adapter->sc_nvifs)) {
1384 		dev_kfree_skb(skb);
1385 		return;
1386 	}
1387 
1388 	/* filling in the ieee80211_rx_status flags */
1389 	rsi_fill_rx_status(hw, skb, common, rx_status);
1390 
1391 	ieee80211_rx_irqsafe(hw, skb);
1392 }
1393 
1394 /**
1395  * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1396  *			    connected.
1397  * @hw: pointer to the ieee80211_hw structure.
1398  * @vif: Pointer to the ieee80211_vif structure.
1399  * @sta: Pointer to the ieee80211_sta structure.
1400  *
1401  * Return: 0 on success, negative error codes on failure.
1402  */
1403 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1404 				struct ieee80211_vif *vif,
1405 				struct ieee80211_sta *sta)
1406 {
1407 	struct rsi_hw *adapter = hw->priv;
1408 	struct rsi_common *common = adapter->priv;
1409 	bool sta_exist = false;
1410 	struct rsi_sta *rsta;
1411 	int status = 0;
1412 
1413 	rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1414 
1415 	mutex_lock(&common->mutex);
1416 
1417 	if ((vif->type == NL80211_IFTYPE_AP) ||
1418 	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1419 		u8 cnt;
1420 		int sta_idx = -1;
1421 		int free_index = -1;
1422 
1423 		/* Check if max stations reached */
1424 		if (common->num_stations >= common->max_stations) {
1425 			rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1426 			status = -EOPNOTSUPP;
1427 			goto unlock;
1428 		}
1429 		for (cnt = 0; cnt < common->max_stations; cnt++) {
1430 			rsta = &common->stations[cnt];
1431 
1432 			if (!rsta->sta) {
1433 				if (free_index < 0)
1434 					free_index = cnt;
1435 				continue;
1436 			}
1437 			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1438 				rsi_dbg(INFO_ZONE, "Station exists\n");
1439 				sta_idx = cnt;
1440 				sta_exist = true;
1441 				break;
1442 			}
1443 		}
1444 		if (!sta_exist) {
1445 			if (free_index >= 0)
1446 				sta_idx = free_index;
1447 		}
1448 		if (sta_idx < 0) {
1449 			rsi_dbg(ERR_ZONE,
1450 				"%s: Some problem reaching here...\n",
1451 				__func__);
1452 			status = -EINVAL;
1453 			goto unlock;
1454 		}
1455 		rsta = &common->stations[sta_idx];
1456 		rsta->sta = sta;
1457 		rsta->sta_id = sta_idx;
1458 		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1459 			rsta->start_tx_aggr[cnt] = false;
1460 		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1461 			rsta->seq_start[cnt] = 0;
1462 		if (!sta_exist) {
1463 			rsi_dbg(INFO_ZONE, "New Station\n");
1464 
1465 			/* Send peer notify to device */
1466 			rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1467 			rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1468 					      sta->addr, sta->wme, sta->aid,
1469 					      sta, sta_idx, 0, vif);
1470 
1471 			if (common->key) {
1472 				struct ieee80211_key_conf *key = common->key;
1473 
1474 				if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1475 				    (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1476 					rsi_hal_load_key(adapter->priv,
1477 							 key->key,
1478 							 key->keylen,
1479 							 RSI_PAIRWISE_KEY,
1480 							 key->keyidx,
1481 							 key->cipher,
1482 							 sta_idx,
1483 							 vif);
1484 			}
1485 
1486 			common->num_stations++;
1487 		}
1488 	}
1489 
1490 	if ((vif->type == NL80211_IFTYPE_STATION) ||
1491 	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1492 		common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1493 		common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1494 		if (sta->deflink.ht_cap.ht_supported) {
1495 			common->bitrate_mask[NL80211_BAND_2GHZ] =
1496 					sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1497 			if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1498 			    (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1499 				common->vif_info[0].sgi = true;
1500 			ieee80211_start_tx_ba_session(sta, 0, 0);
1501 		}
1502 	}
1503 
1504 unlock:
1505 	mutex_unlock(&common->mutex);
1506 
1507 	return status;
1508 }
1509 
1510 /**
1511  * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1512  *			       getting disconnected.
1513  * @hw: Pointer to the ieee80211_hw structure.
1514  * @vif: Pointer to the ieee80211_vif structure.
1515  * @sta: Pointer to the ieee80211_sta structure.
1516  *
1517  * Return: 0 on success, negative error codes on failure.
1518  */
1519 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1520 				   struct ieee80211_vif *vif,
1521 				   struct ieee80211_sta *sta)
1522 {
1523 	struct rsi_hw *adapter = hw->priv;
1524 	struct rsi_common *common = adapter->priv;
1525 	struct ieee80211_bss_conf *bss = &vif->bss_conf;
1526 	struct rsi_sta *rsta;
1527 
1528 	rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1529 
1530 	mutex_lock(&common->mutex);
1531 
1532 	if ((vif->type == NL80211_IFTYPE_AP) ||
1533 	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1534 		u8 sta_idx, cnt;
1535 
1536 		/* Send peer notify to device */
1537 		rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1538 		for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1539 			rsta = &common->stations[sta_idx];
1540 
1541 			if (!rsta->sta)
1542 				continue;
1543 			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1544 				rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1545 						      sta->addr, sta->wme,
1546 						      sta->aid, sta, sta_idx,
1547 						      0, vif);
1548 				rsta->sta = NULL;
1549 				rsta->sta_id = -1;
1550 				for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1551 					rsta->start_tx_aggr[cnt] = false;
1552 				if (common->num_stations > 0)
1553 					common->num_stations--;
1554 				break;
1555 			}
1556 		}
1557 		if (sta_idx >= common->max_stations)
1558 			rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1559 	}
1560 
1561 	if ((vif->type == NL80211_IFTYPE_STATION) ||
1562 	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1563 		/* Resetting all the fields to default values */
1564 		memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1565 		bss->qos = sta->wme;
1566 		common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1567 		common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1568 		common->vif_info[0].is_ht = false;
1569 		common->vif_info[0].sgi = false;
1570 		common->vif_info[0].seq_start = 0;
1571 		common->secinfo.ptk_cipher = 0;
1572 		common->secinfo.gtk_cipher = 0;
1573 		if (!common->iface_down)
1574 			rsi_send_rx_filter_frame(common, 0);
1575 	}
1576 	mutex_unlock(&common->mutex);
1577 
1578 	return 0;
1579 }
1580 
1581 /**
1582  * rsi_mac80211_set_antenna() - This function is used to configure
1583  *				tx and rx antennas.
1584  * @hw: Pointer to the ieee80211_hw structure.
1585  * @tx_ant: Bitmap for tx antenna
1586  * @rx_ant: Bitmap for rx antenna
1587  *
1588  * Return: 0 on success, Negative error code on failure.
1589  */
1590 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1591 				    u32 tx_ant, u32 rx_ant)
1592 {
1593 	struct rsi_hw *adapter = hw->priv;
1594 	struct rsi_common *common = adapter->priv;
1595 	u8 antenna = 0;
1596 
1597 	if (tx_ant > 1 || rx_ant > 1) {
1598 		rsi_dbg(ERR_ZONE,
1599 			"Invalid antenna selection (tx: %d, rx:%d)\n",
1600 			tx_ant, rx_ant);
1601 		rsi_dbg(ERR_ZONE,
1602 			"Use 0 for int_ant, 1 for ext_ant\n");
1603 		return -EINVAL;
1604 	}
1605 
1606 	rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1607 			__func__, tx_ant, rx_ant);
1608 
1609 	mutex_lock(&common->mutex);
1610 
1611 	antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1612 	if (common->ant_in_use != antenna)
1613 		if (rsi_set_antenna(common, antenna))
1614 			goto fail_set_antenna;
1615 
1616 	rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1617 		tx_ant ? "UFL" : "INT");
1618 
1619 	common->ant_in_use = antenna;
1620 
1621 	mutex_unlock(&common->mutex);
1622 
1623 	return 0;
1624 
1625 fail_set_antenna:
1626 	rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1627 	mutex_unlock(&common->mutex);
1628 	return -EINVAL;
1629 }
1630 
1631 /**
1632  * rsi_mac80211_get_antenna() - This function is used to configure
1633  * 				tx and rx antennas.
1634  *
1635  * @hw: Pointer to the ieee80211_hw structure.
1636  * @tx_ant: Bitmap for tx antenna
1637  * @rx_ant: Bitmap for rx antenna
1638  *
1639  * Return: 0 on success, negative error codes on failure.
1640  */
1641 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1642 				    u32 *tx_ant, u32 *rx_ant)
1643 {
1644 	struct rsi_hw *adapter = hw->priv;
1645 	struct rsi_common *common = adapter->priv;
1646 
1647 	mutex_lock(&common->mutex);
1648 
1649 	*tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1650 	*rx_ant = 0;
1651 
1652 	mutex_unlock(&common->mutex);
1653 
1654 	return 0;
1655 }
1656 
1657 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1658 {
1659 	switch (region_code) {
1660 	case NL80211_DFS_FCC:
1661 		return RSI_REGION_FCC;
1662 	case NL80211_DFS_ETSI:
1663 		return RSI_REGION_ETSI;
1664 	case NL80211_DFS_JP:
1665 		return RSI_REGION_TELEC;
1666 	case NL80211_DFS_UNSET:
1667 		return RSI_REGION_WORLD;
1668 	}
1669 	return RSI_REGION_WORLD;
1670 }
1671 
1672 static void rsi_reg_notify(struct wiphy *wiphy,
1673 			   struct regulatory_request *request)
1674 {
1675 	struct ieee80211_supported_band *sband;
1676 	struct ieee80211_channel *ch;
1677 	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1678 	struct rsi_hw * adapter = hw->priv;
1679 	struct rsi_common *common = adapter->priv;
1680 	int i;
1681 
1682 	mutex_lock(&common->mutex);
1683 
1684 	rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1685 		request->alpha2, request->dfs_region);
1686 
1687 	if (common->num_supp_bands > 1) {
1688 		sband = wiphy->bands[NL80211_BAND_5GHZ];
1689 
1690 		for (i = 0; i < sband->n_channels; i++) {
1691 			ch = &sband->channels[i];
1692 			if (ch->flags & IEEE80211_CHAN_DISABLED)
1693 				continue;
1694 
1695 			if (ch->flags & IEEE80211_CHAN_RADAR)
1696 				ch->flags |= IEEE80211_CHAN_NO_IR;
1697 		}
1698 	}
1699 	adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1700 	rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1701 
1702 	adapter->country[0] = request->alpha2[0];
1703 	adapter->country[1] = request->alpha2[1];
1704 
1705 	mutex_unlock(&common->mutex);
1706 }
1707 
1708 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1709 {
1710 	struct rsi_hw *adapter = hw->priv;
1711 	struct rsi_common *common = adapter->priv;
1712 
1713 	mutex_lock(&common->mutex);
1714 	if (common->fsm_state != FSM_MAC_INIT_DONE)
1715 		wiphy_rfkill_set_hw_state(hw->wiphy, true);
1716 	else
1717 		wiphy_rfkill_set_hw_state(hw->wiphy, false);
1718 	mutex_unlock(&common->mutex);
1719 }
1720 
1721 static void rsi_resume_conn_channel(struct rsi_common *common)
1722 {
1723 	struct rsi_hw *adapter = common->priv;
1724 	struct ieee80211_vif *vif;
1725 	int cnt;
1726 
1727 	for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1728 		vif = adapter->vifs[cnt];
1729 		if (!vif)
1730 			continue;
1731 
1732 		if ((vif->type == NL80211_IFTYPE_AP) ||
1733 		    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1734 			rsi_switch_channel(adapter, vif);
1735 			break;
1736 		}
1737 		if (((vif->type == NL80211_IFTYPE_STATION) ||
1738 		     (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1739 		    vif->cfg.assoc) {
1740 			rsi_switch_channel(adapter, vif);
1741 			break;
1742 		}
1743 	}
1744 }
1745 
1746 void rsi_roc_timeout(struct timer_list *t)
1747 {
1748 	struct rsi_common *common = from_timer(common, t, roc_timer);
1749 
1750 	rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1751 
1752 	mutex_lock(&common->mutex);
1753 	ieee80211_remain_on_channel_expired(common->priv->hw);
1754 
1755 	if (timer_pending(&common->roc_timer))
1756 		del_timer(&common->roc_timer);
1757 
1758 	rsi_resume_conn_channel(common);
1759 	mutex_unlock(&common->mutex);
1760 }
1761 
1762 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1763 			    struct ieee80211_channel *chan, int duration,
1764 			    enum ieee80211_roc_type type)
1765 {
1766 	struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
1767 	struct rsi_common *common = (struct rsi_common *)adapter->priv;
1768 	int status = 0;
1769 
1770 	rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1771 
1772 	mutex_lock(&common->mutex);
1773 	rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1774 		__func__, chan->hw_value, duration);
1775 
1776 	if (timer_pending(&common->roc_timer)) {
1777 		rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1778 		del_timer(&common->roc_timer);
1779 	}
1780 	common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1781 	add_timer(&common->roc_timer);
1782 
1783 	/* Configure band */
1784 	if (rsi_band_check(common, chan)) {
1785 		rsi_dbg(ERR_ZONE, "Failed to set band\n");
1786 		status = -EINVAL;
1787 		goto out;
1788 	}
1789 
1790 	/* Configure channel */
1791 	if (rsi_set_channel(common, chan)) {
1792 		rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1793 		status = -EINVAL;
1794 		goto out;
1795 	}
1796 
1797 	common->roc_vif = vif;
1798 	ieee80211_ready_on_channel(hw);
1799 	rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1800 		__func__, chan->hw_value);
1801 
1802 out:
1803 	mutex_unlock(&common->mutex);
1804 
1805 	return status;
1806 }
1807 
1808 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1809 				   struct ieee80211_vif *vif)
1810 {
1811 	struct rsi_hw *adapter = hw->priv;
1812 	struct rsi_common *common = adapter->priv;
1813 
1814 	rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1815 
1816 	mutex_lock(&common->mutex);
1817 	if (!timer_pending(&common->roc_timer)) {
1818 		mutex_unlock(&common->mutex);
1819 		return 0;
1820 	}
1821 
1822 	del_timer(&common->roc_timer);
1823 
1824 	rsi_resume_conn_channel(common);
1825 	mutex_unlock(&common->mutex);
1826 
1827 	return 0;
1828 }
1829 
1830 #ifdef CONFIG_PM
1831 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1832 	.flags = WIPHY_WOWLAN_ANY |
1833 		 WIPHY_WOWLAN_MAGIC_PKT |
1834 		 WIPHY_WOWLAN_DISCONNECT |
1835 		 WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1836 		 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1837 		 WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1838 		 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1839 };
1840 
1841 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1842 				struct cfg80211_wowlan *wowlan)
1843 {
1844 	u16 wow_triggers = 0;
1845 
1846 	rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1847 
1848 	if (wowlan->any)
1849 		wow_triggers |= RSI_WOW_ANY;
1850 	if (wowlan->magic_pkt)
1851 		wow_triggers |= RSI_WOW_MAGIC_PKT;
1852 	if (wowlan->disconnect)
1853 		wow_triggers |= RSI_WOW_DISCONNECT;
1854 	if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1855 	    wowlan->four_way_handshake)
1856 		wow_triggers |= RSI_WOW_GTK_REKEY;
1857 
1858 	return wow_triggers;
1859 }
1860 
1861 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1862 {
1863 	struct rsi_common *common = adapter->priv;
1864 	struct ieee80211_vif *vif = adapter->vifs[0];
1865 	u16 triggers = 0;
1866 	u16 rx_filter_word = 0;
1867 
1868 	rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1869 
1870 	if (!vif)
1871 		return -EINVAL;
1872 
1873 	if (WARN_ON(!wowlan)) {
1874 		rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1875 		return -EINVAL;
1876 	}
1877 
1878 	common->wow_flags |= RSI_WOW_ENABLED;
1879 	triggers = rsi_wow_map_triggers(common, wowlan);
1880 	if (!triggers) {
1881 		rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1882 		return -EINVAL;
1883 	}
1884 	if (!vif->cfg.assoc) {
1885 		rsi_dbg(ERR_ZONE,
1886 			"Cannot configure WoWLAN (Station not connected)\n");
1887 		common->wow_flags |= RSI_WOW_NO_CONNECTION;
1888 		return 0;
1889 	}
1890 	rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1891 
1892 	if (common->coex_mode > 1)
1893 		rsi_disable_ps(adapter, adapter->vifs[0]);
1894 
1895 	rsi_send_wowlan_request(common, triggers, 1);
1896 
1897 	/**
1898 	 * Increase the beacon_miss threshold & keep-alive timers in
1899 	 * vap_update frame
1900 	 */
1901 	rsi_send_vap_dynamic_update(common);
1902 
1903 	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1904 	rsi_send_rx_filter_frame(common, rx_filter_word);
1905 
1906 	return 0;
1907 }
1908 EXPORT_SYMBOL(rsi_config_wowlan);
1909 
1910 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1911 				struct cfg80211_wowlan *wowlan)
1912 {
1913 	struct rsi_hw *adapter = hw->priv;
1914 	struct rsi_common *common = adapter->priv;
1915 
1916 	rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1917 	mutex_lock(&common->mutex);
1918 	if (rsi_config_wowlan(adapter, wowlan)) {
1919 		rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1920 		mutex_unlock(&common->mutex);
1921 		return 1;
1922 	}
1923 	mutex_unlock(&common->mutex);
1924 
1925 	return 0;
1926 }
1927 
1928 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1929 {
1930 	u16 rx_filter_word = 0;
1931 	struct rsi_hw *adapter = hw->priv;
1932 	struct rsi_common *common = adapter->priv;
1933 
1934 	common->wow_flags = 0;
1935 
1936 	rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1937 
1938 	if (common->hibernate_resume) {
1939 		common->mac_ops_resumed = true;
1940 		/* Device need a complete restart of all MAC operations.
1941 		 * returning 1 will serve this purpose.
1942 		 */
1943 		return 1;
1944 	}
1945 
1946 	mutex_lock(&common->mutex);
1947 	rsi_send_wowlan_request(common, 0, 0);
1948 
1949 	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1950 			  ALLOW_MGMT_ASSOC_PEER);
1951 	rsi_send_rx_filter_frame(common, rx_filter_word);
1952 	mutex_unlock(&common->mutex);
1953 
1954 	return 0;
1955 }
1956 
1957 #endif
1958 
1959 static const struct ieee80211_ops mac80211_ops = {
1960 	.tx = rsi_mac80211_tx,
1961 	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
1962 	.start = rsi_mac80211_start,
1963 	.stop = rsi_mac80211_stop,
1964 	.add_interface = rsi_mac80211_add_interface,
1965 	.remove_interface = rsi_mac80211_remove_interface,
1966 	.config = rsi_mac80211_config,
1967 	.bss_info_changed = rsi_mac80211_bss_info_changed,
1968 	.conf_tx = rsi_mac80211_conf_tx,
1969 	.configure_filter = rsi_mac80211_conf_filter,
1970 	.set_key = rsi_mac80211_set_key,
1971 	.set_rts_threshold = rsi_mac80211_set_rts_threshold,
1972 	.set_bitrate_mask = rsi_mac80211_set_rate_mask,
1973 	.ampdu_action = rsi_mac80211_ampdu_action,
1974 	.sta_add = rsi_mac80211_sta_add,
1975 	.sta_remove = rsi_mac80211_sta_remove,
1976 	.set_antenna = rsi_mac80211_set_antenna,
1977 	.get_antenna = rsi_mac80211_get_antenna,
1978 	.rfkill_poll = rsi_mac80211_rfkill_poll,
1979 	.remain_on_channel = rsi_mac80211_roc,
1980 	.cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1981 #ifdef CONFIG_PM
1982 	.suspend = rsi_mac80211_suspend,
1983 	.resume  = rsi_mac80211_resume,
1984 #endif
1985 	.hw_scan = rsi_mac80211_hw_scan_start,
1986 	.cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
1987 };
1988 
1989 /**
1990  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1991  * @common: Pointer to the driver private structure.
1992  *
1993  * Return: 0 on success, negative error codes on failure.
1994  */
1995 int rsi_mac80211_attach(struct rsi_common *common)
1996 {
1997 	int status = 0;
1998 	struct ieee80211_hw *hw = NULL;
1999 	struct wiphy *wiphy = NULL;
2000 	struct rsi_hw *adapter = common->priv;
2001 	u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2002 
2003 	rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2004 
2005 	hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2006 	if (!hw) {
2007 		rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2008 		return -ENOMEM;
2009 	}
2010 
2011 	wiphy = hw->wiphy;
2012 
2013 	SET_IEEE80211_DEV(hw, adapter->device);
2014 
2015 	hw->priv = adapter;
2016 	adapter->hw = hw;
2017 
2018 	ieee80211_hw_set(hw, SIGNAL_DBM);
2019 	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2020 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2021 	ieee80211_hw_set(hw, SUPPORTS_PS);
2022 	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2023 
2024 	hw->queues = MAX_HW_QUEUES;
2025 	hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2026 
2027 	hw->max_rates = 1;
2028 	hw->max_rate_tries = MAX_RETRIES;
2029 	hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2030 	hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2031 
2032 	hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2033 	hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2034 	hw->rate_control_algorithm = "AARF";
2035 
2036 	SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2037 	ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2038 
2039 	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2040 				 BIT(NL80211_IFTYPE_AP) |
2041 				 BIT(NL80211_IFTYPE_P2P_DEVICE) |
2042 				 BIT(NL80211_IFTYPE_P2P_CLIENT) |
2043 				 BIT(NL80211_IFTYPE_P2P_GO);
2044 
2045 	wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2046 	wiphy->retry_short = RETRY_SHORT;
2047 	wiphy->retry_long  = RETRY_LONG;
2048 	wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2049 	wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2050 	wiphy->flags = 0;
2051 
2052 	wiphy->available_antennas_rx = 1;
2053 	wiphy->available_antennas_tx = 1;
2054 
2055 	status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2056 	if (status)
2057 		return status;
2058 	wiphy->bands[NL80211_BAND_2GHZ] =
2059 		&adapter->sbands[NL80211_BAND_2GHZ];
2060 	if (common->num_supp_bands > 1) {
2061 		status = rsi_register_rates_channels(adapter,
2062 						     NL80211_BAND_5GHZ);
2063 		if (status)
2064 			return status;
2065 		wiphy->bands[NL80211_BAND_5GHZ] =
2066 			&adapter->sbands[NL80211_BAND_5GHZ];
2067 	}
2068 
2069 	/* AP Parameters */
2070 	wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2071 	common->max_stations = wiphy->max_ap_assoc_sta;
2072 	rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2073 	hw->sta_data_size = sizeof(struct rsi_sta);
2074 
2075 	wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2076 	wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2077 	wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2078 	wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2079 	wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2080 	wiphy->reg_notifier = rsi_reg_notify;
2081 
2082 #ifdef CONFIG_PM
2083 	wiphy->wowlan = &rsi_wowlan_support;
2084 #endif
2085 
2086 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2087 
2088 	/* Wi-Fi direct parameters */
2089 	wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2090 	wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2091 	wiphy->max_remain_on_channel_duration = 10000;
2092 	hw->max_listen_interval = 10;
2093 	wiphy->iface_combinations = rsi_iface_combinations;
2094 	wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2095 
2096 	if (common->coex_mode > 1)
2097 		wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2098 
2099 	status = ieee80211_register_hw(hw);
2100 	if (status)
2101 		return status;
2102 
2103 	return rsi_init_dbgfs(adapter);
2104 }
2105