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(p: rsi_2ghz_channels, size: 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(p: rsi_5ghz_channels, size: 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, fmt: "***** 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, fmt: "Background scan started...\n");
266	common->bgscan_en = true;
267	}
268	}
269	mutex_unlock(lock: &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, fmt: "***** 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(hw: adapter->hw, info: &info);
289	rsi_dbg(INFO_ZONE, fmt: "Back ground scan cancelled\n");
290	}
291	common->hwscan = NULL;
292	mutex_unlock(lock: &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(objp: sband->channels);
319	}
320
321	#ifdef CONFIG_RSI_DEBUGFS
322	rsi_remove_dbgfs(adapter);
323	kfree(objp: 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, fmt: "##### 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, len: tx_params->internal_hdr_size);
353	memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
354
355	ieee80211_tx_status_irqsafe(hw: 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(fc: 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, fmt: "===> 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(wiphy: hw->wiphy);
404	rsi_send_rx_filter_frame(common, rx_filter_word: 0);
405	mutex_unlock(lock: &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, fmt: "===> Interface DOWN <===\n");
422	mutex_lock(&common->mutex);
423	common->iface_down = true;
424	wiphy_rfkill_stop_polling(wiphy: hw->wiphy);
425
426	/* Block all rx frames */
427	rsi_send_rx_filter_frame(common, rx_filter_word: 0xffff);
428
429	mutex_unlock(lock: &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: vif->type);
472	if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
473	rsi_dbg(ERR_ZONE,
474	fmt: "%s: Interface type %d not supported\n", __func__,
475	vif->type);
476	mutex_unlock(lock: &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(p: vif->addr, q: adapter->vifs[i]->addr, ETH_ALEN)) {
488	vap_idx = i;
489	break;
490	}
491	}
492	if (vap_idx < 0) {
493	rsi_dbg(ERR_ZONE, fmt: "Reject: Max VAPs reached\n");
494	mutex_unlock(lock: &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, mode: intf_mode, mac_addr: vif->addr,
503	vap_id: vif_info->vap_id, vap_status)) {
504	rsi_dbg(ERR_ZONE, fmt: "Failed to set VAP capabilities\n");
505	mutex_unlock(lock: &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(lock: &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, fmt: "Remove Interface Called\n");
538
539	mutex_lock(&common->mutex);
540
541	if (adapter->sc_nvifs <= 0) {
542	mutex_unlock(lock: &common->mutex);
543	return;
544	}
545
546	opmode = rsi_map_intf_mode(vif_type: vif->type);
547	if (opmode == RSI_OPMODE_UNSUPPORTED) {
548	rsi_dbg(ERR_ZONE, fmt: "Opmode error : %d\n", opmode);
549	mutex_unlock(lock: &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, mode: opmode, mac_addr: vif->addr,
557	vap_id: i, vap_status: VAP_DELETE);
558	adapter->sc_nvifs--;
559	adapter->vifs[i] = NULL;
560	}
561	}
562	mutex_unlock(lock: &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	fmt: "%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, fmt: "blk data q %d\n", channel);
604	if (!rsi_send_block_unblock_frame(common, event: true))
605	common->hw_data_qs_blocked = true;
606	}
607	}
608
609	status = rsi_band_check(common, chan: curchan);
610	if (!status)
611	status = rsi_set_channel(common: adapter->priv, channel: curchan);
612
613	if (assoc) {
614	if (common->hw_data_qs_blocked &&
615	(rsi_get_connected_channel(vif) == channel)) {
616	rsi_dbg(INFO_ZONE, fmt: "unblk data q %d\n", channel);
617	if (!rsi_send_block_unblock_frame(common, event: 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, fmt: "%s: No virtual interface found\n", __func__);
639	return -EINVAL;
640	}
641
642	rsi_dbg(INFO_ZONE,
643	fmt: "%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, fmt: "%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, vif: sta_vif);
707	else
708	rsi_disable_ps(adapter, vif: sta_vif);
709	spin_unlock_irqrestore(lock: &adapter->ps_lock, flags);
710	}
711	}
712
713	/* RTS threshold */
714	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
715	rsi_dbg(INFO_ZONE, fmt: "RTS threshold\n");
716	if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
717	rsi_dbg(INFO_ZONE,
718	fmt: "%s: Sending vap updates....\n", __func__);
719	status = rsi_send_vap_dynamic_update(common);
720	}
721	}
722	mutex_unlock(lock: &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, chan: channel);
768	rsi_set_channel(common, channel);
769	rsi_dbg(INFO_ZONE, fmt: "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, fmt: "%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	opmode: RSI_OPMODE_STA,
807	status: vif->cfg.assoc,
808	addr: bss_conf->bssid,
809	qos_enable: bss_conf->qos,
810	aid: vif->cfg.aid,
811	NULL, sta_id: 0,
812	assoc_cap: 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, fmt: "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, fmt: "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, fmt: "%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, mode: RSI_OPMODE_AP,
845	mac_addr: vif->addr, vap_id: vif_info->vap_id,
846	vap_status: 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, fmt: "===> BEACON ENABLED <===\n");
858	common->beacon_enabled = 1;
859	} else {
860	rsi_dbg(INFO_ZONE, fmt: "===> BEACON DISABLED <===\n");
861	common->beacon_enabled = 0;
862	}
863	}
864
865	mutex_unlock(lock: &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	fmt: "%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(lock: &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, fmt: "%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(common: adapter->priv, mac_addr: 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(common: adapter->priv,
989	data: key->key,
990	key_len: key->keylen,
991	RSI_PAIRWISE_KEY,
992	key_id: key->keyidx,
993	cipher: key->cipher,
994	sta_id,
995	vif);
996	if (status)
997	return status;
998	}
999	}
1000
1001	status = rsi_hal_load_key(common: adapter->priv,
1002	data: key->key,
1003	key_len: key->keylen,
1004	key_type,
1005	key_id: key->keyidx,
1006	cipher: 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(common: adapter->priv, event: 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(lock: &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, fmt: "%s: RSI set_key\n", __func__);
1061	break;
1062
1063	case DISABLE_KEY:
1064	rsi_dbg(ERR_ZONE, fmt: "%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(lock: &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, mac_addr: sta->addr);
1121	if (!rsta) {
1122	rsi_dbg(ERR_ZONE, fmt: "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	fmt: "%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	ssn: seq_no,
1138	buf_size,
1139	event: 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	ssn: 0,
1147	buf_size,
1148	event: 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	ssn: seq_no,
1168	buf_size,
1169	event: STA_TX_DELBA,
1170	sta_id);
1171	if (!status)
1172	ieee80211_stop_tx_ba_cb_irqsafe(vif, ra: 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	ssn: seq_start,
1185	buf_size,
1186	event: STA_TX_ADDBA_DONE,
1187	sta_id);
1188	break;
1189
1190	default:
1191	rsi_dbg(ERR_ZONE, fmt: "%s: Unknown AMPDU action\n", __func__);
1192	break;
1193	}
1194
1195	unlock:
1196	mutex_unlock(lock: &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(lock: &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(lock: &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, fmt: "CQM: Notifying event: %d\n", event);
1290	ieee80211_cqm_rssi_notify(vif, rssi_event: event, rssi_level: 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(fc: 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(chan: channel, band: rxs->band);
1332
1333	if (freq)
1334	rxs->freq = freq;
1335
1336	if (ieee80211_has_protected(fc: hdr->frame_control)) {
1337	if (rsi_is_cipher_wep(common)) {
1338	memmove(skb->data + 4, skb->data, hdrlen);
1339	skb_pull(skb, len: 4);
1340	} else {
1341	memmove(skb->data + 8, skb->data, hdrlen);
1342	skb_pull(skb, len: 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(p: bss->bssid, q: hdr->addr2, ETH_ALEN))) {
1362	if (ieee80211_is_beacon(fc: hdr->frame_control))
1363	rsi_perform_cqm(common, bssid: hdr->addr2, rssi: 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, rxs: 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, fmt: "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, fmt: "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(p: rsta->sta->addr, q: sta->addr, ETH_ALEN)) {
1438	rsi_dbg(INFO_ZONE, fmt: "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	fmt: "%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, fmt: "New Station\n");
1464
1465	/* Send peer notify to device */
1466	rsi_dbg(INFO_ZONE, fmt: "Indicate bss status to device\n");
1467	rsi_inform_bss_status(common, opmode: RSI_OPMODE_AP, status: 1,
1468	addr: sta->addr, qos_enable: sta->wme, aid: sta->aid,
1469	sta, sta_id: sta_idx, assoc_cap: 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(common: adapter->priv,
1477	data: key->key,
1478	key_len: key->keylen,
1479	RSI_PAIRWISE_KEY,
1480	key_id: key->keyidx,
1481	cipher: key->cipher,
1482	sta_id: 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, tid: 0, timeout: 0);
1501	}
1502	}
1503
1504	unlock:
1505	mutex_unlock(lock: &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, fmt: "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, fmt: "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(p: rsta->sta->addr, q: sta->addr, ETH_ALEN)) {
1544	rsi_inform_bss_status(common, opmode: RSI_OPMODE_AP, status: 0,
1545	addr: sta->addr, qos_enable: sta->wme,
1546	aid: sta->aid, sta, sta_id: sta_idx,
1547	assoc_cap: 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, fmt: "%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, rx_filter_word: 0);
1575	}
1576	mutex_unlock(lock: &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	fmt: "Invalid antenna selection (tx: %d, rx:%d)\n",
1600	tx_ant, rx_ant);
1601	rsi_dbg(ERR_ZONE,
1602	fmt: "Use 0 for int_ant, 1 for ext_ant\n");
1603	return -EINVAL;
1604	}
1605
1606	rsi_dbg(INFO_ZONE, fmt: "%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, fmt: "(%s) Antenna path configured successfully\n",
1617	tx_ant ? "UFL" : "INT");
1618
1619	common->ant_in_use = antenna;
1620
1621	mutex_unlock(lock: &common->mutex);
1622
1623	return 0;
1624
1625	fail_set_antenna:
1626	rsi_dbg(ERR_ZONE, fmt: "%s: Failed.\n", __func__);
1627	mutex_unlock(lock: &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(lock: &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, fmt: "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(region_code: request->dfs_region);
1700	rsi_dbg(INFO_ZONE, fmt: "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(lock: &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(wiphy: hw->wiphy, blocked: true);
1716	else
1717	wiphy_rfkill_set_hw_state(wiphy: hw->wiphy, blocked: false);
1718	mutex_unlock(lock: &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, fmt: "Remain on channel expired\n");
1751
1752	mutex_lock(&common->mutex);
1753	ieee80211_remain_on_channel_expired(hw: common->priv->hw);
1754
1755	if (timer_pending(timer: &common->roc_timer))
1756	del_timer(timer: &common->roc_timer);
1757
1758	rsi_resume_conn_channel(common);
1759	mutex_unlock(lock: &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 = hw->priv;
1767	struct rsi_common *common = adapter->priv;
1768	int status = 0;
1769
1770	rsi_dbg(INFO_ZONE, fmt: "***** Remain on channel *****\n");
1771
1772	mutex_lock(&common->mutex);
1773	rsi_dbg(INFO_ZONE, fmt: "%s: channel: %d duration: %dms\n",
1774	__func__, chan->hw_value, duration);
1775
1776	if (timer_pending(timer: &common->roc_timer)) {
1777	rsi_dbg(INFO_ZONE, fmt: "Stop on-going ROC\n");
1778	del_timer(timer: &common->roc_timer);
1779	}
1780	common->roc_timer.expires = msecs_to_jiffies(m: duration) + jiffies;
1781	add_timer(timer: &common->roc_timer);
1782
1783	/* Configure band */
1784	if (rsi_band_check(common, chan)) {
1785	rsi_dbg(ERR_ZONE, fmt: "Failed to set band\n");
1786	status = -EINVAL;
1787	goto out;
1788	}
1789
1790	/* Configure channel */
1791	if (rsi_set_channel(common, channel: chan)) {
1792	rsi_dbg(ERR_ZONE, fmt: "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, fmt: "%s: Ready on channel :%d\n",
1800	__func__, chan->hw_value);
1801
1802	out:
1803	mutex_unlock(lock: &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, fmt: "Cancel remain on channel\n");
1815
1816	mutex_lock(&common->mutex);
1817	if (!timer_pending(timer: &common->roc_timer)) {
1818	mutex_unlock(lock: &common->mutex);
1819	return 0;
1820	}
1821
1822	del_timer(timer: &common->roc_timer);
1823
1824	rsi_resume_conn_channel(common);
1825	mutex_unlock(lock: &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, fmt: "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, fmt: "Config WoWLAN to device\n");
1869
1870	if (!vif)
1871	return -EINVAL;
1872
1873	if (WARN_ON(!wowlan)) {
1874	rsi_dbg(ERR_ZONE, fmt: "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, fmt: "%s:No valid WoW triggers\n", __func__);
1882	return -EINVAL;
1883	}
1884	if (!vif->cfg.assoc) {
1885	rsi_dbg(ERR_ZONE,
1886	fmt: "Cannot configure WoWLAN (Station not connected)\n");
1887	common->wow_flags |= RSI_WOW_NO_CONNECTION;
1888	return 0;
1889	}
1890	rsi_dbg(INFO_ZONE, fmt: "TRIGGERS %x\n", triggers);
1891
1892	if (common->coex_mode > 1)
1893	rsi_disable_ps(adapter, vif: adapter->vifs[0]);
1894
1895	rsi_send_wowlan_request(common, flags: triggers, sleep_status: 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, fmt: "%s: mac80211 suspend\n", __func__);
1917	mutex_lock(&common->mutex);
1918	if (rsi_config_wowlan(adapter, wowlan)) {
1919	rsi_dbg(ERR_ZONE, fmt: "Failed to configure WoWLAN\n");
1920	mutex_unlock(lock: &common->mutex);
1921	return 1;
1922	}
1923	mutex_unlock(lock: &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, fmt: "%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, flags: 0, sleep_status: 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(lock: &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, fmt: "%s: Performing mac80211 attach\n", __func__);
2004
2005	hw = ieee80211_alloc_hw(priv_data_len: sizeof(struct rsi_hw), ops: &mac80211_ops);
2006	if (!hw) {
2007	rsi_dbg(ERR_ZONE, fmt: "%s: ieee80211 hw alloc failed\n", __func__);
2008	return -ENOMEM;
2009	}
2010
2011	wiphy = hw->wiphy;
2012
2013	SET_IEEE80211_DEV(hw, dev: 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, addr: common->mac_addr);
2037	ether_addr_copy(dst: hw->wiphy->addr_mask, src: 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, band: 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	band: 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, fmt: "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, ftidx: 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