1 /*
2  * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
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 ANY
11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 
19 #include <linux/module.h>
20 #include <linux/firmware.h>
21 #include <linux/platform_device.h>
22 #include <linux/of_address.h>
23 #include <linux/of_device.h>
24 #include <linux/of_irq.h>
25 #include <linux/rpmsg.h>
26 #include <linux/soc/qcom/smem_state.h>
27 #include <linux/soc/qcom/wcnss_ctrl.h>
28 #include <net/ipv6.h>
29 #include "wcn36xx.h"
30 #include "testmode.h"
31 #include "firmware.h"
32 
33 unsigned int wcn36xx_dbg_mask;
34 module_param_named(debug_mask, wcn36xx_dbg_mask, uint, 0644);
35 MODULE_PARM_DESC(debug_mask, "Debugging mask");
36 
37 #define CHAN2G(_freq, _idx) { \
38 	.band = NL80211_BAND_2GHZ, \
39 	.center_freq = (_freq), \
40 	.hw_value = (_idx), \
41 	.max_power = 25, \
42 }
43 
44 #define CHAN5G(_freq, _idx, _phy_val) { \
45 	.band = NL80211_BAND_5GHZ, \
46 	.center_freq = (_freq), \
47 	.hw_value = (_phy_val) << HW_VALUE_PHY_SHIFT | HW_VALUE_CHANNEL(_idx), \
48 	.max_power = 25, \
49 }
50 
51 /* The wcn firmware expects channel values to matching
52  * their mnemonic values. So use these for .hw_value. */
53 static struct ieee80211_channel wcn_2ghz_channels[] = {
54 	CHAN2G(2412, 1), /* Channel 1 */
55 	CHAN2G(2417, 2), /* Channel 2 */
56 	CHAN2G(2422, 3), /* Channel 3 */
57 	CHAN2G(2427, 4), /* Channel 4 */
58 	CHAN2G(2432, 5), /* Channel 5 */
59 	CHAN2G(2437, 6), /* Channel 6 */
60 	CHAN2G(2442, 7), /* Channel 7 */
61 	CHAN2G(2447, 8), /* Channel 8 */
62 	CHAN2G(2452, 9), /* Channel 9 */
63 	CHAN2G(2457, 10), /* Channel 10 */
64 	CHAN2G(2462, 11), /* Channel 11 */
65 	CHAN2G(2467, 12), /* Channel 12 */
66 	CHAN2G(2472, 13), /* Channel 13 */
67 	CHAN2G(2484, 14)  /* Channel 14 */
68 
69 };
70 
71 static struct ieee80211_channel wcn_5ghz_channels[] = {
72 	CHAN5G(5180, 36, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
73 	CHAN5G(5200, 40, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
74 	CHAN5G(5220, 44, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
75 	CHAN5G(5240, 48, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
76 	CHAN5G(5260, 52, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
77 	CHAN5G(5280, 56, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
78 	CHAN5G(5300, 60, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
79 	CHAN5G(5320, 64, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
80 	CHAN5G(5500, 100, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
81 	CHAN5G(5520, 104, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
82 	CHAN5G(5540, 108, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
83 	CHAN5G(5560, 112, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
84 	CHAN5G(5580, 116, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
85 	CHAN5G(5600, 120, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
86 	CHAN5G(5620, 124, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
87 	CHAN5G(5640, 128, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
88 	CHAN5G(5660, 132, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
89 	CHAN5G(5680, 136, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
90 	CHAN5G(5700, 140, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
91 	CHAN5G(5720, 144, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
92 	CHAN5G(5745, 149, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
93 	CHAN5G(5765, 153, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
94 	CHAN5G(5785, 157, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
95 	CHAN5G(5805, 161, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
96 	CHAN5G(5825, 165, 0)
97 };
98 
99 #define RATE(_bitrate, _hw_rate, _flags) { \
100 	.bitrate        = (_bitrate),                   \
101 	.flags          = (_flags),                     \
102 	.hw_value       = (_hw_rate),                   \
103 	.hw_value_short = (_hw_rate)  \
104 }
105 
106 static struct ieee80211_rate wcn_2ghz_rates[] = {
107 	RATE(10, HW_RATE_INDEX_1MBPS, 0),
108 	RATE(20, HW_RATE_INDEX_2MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
109 	RATE(55, HW_RATE_INDEX_5_5MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
110 	RATE(110, HW_RATE_INDEX_11MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
111 	RATE(60, HW_RATE_INDEX_6MBPS, 0),
112 	RATE(90, HW_RATE_INDEX_9MBPS, 0),
113 	RATE(120, HW_RATE_INDEX_12MBPS, 0),
114 	RATE(180, HW_RATE_INDEX_18MBPS, 0),
115 	RATE(240, HW_RATE_INDEX_24MBPS, 0),
116 	RATE(360, HW_RATE_INDEX_36MBPS, 0),
117 	RATE(480, HW_RATE_INDEX_48MBPS, 0),
118 	RATE(540, HW_RATE_INDEX_54MBPS, 0)
119 };
120 
121 static struct ieee80211_rate wcn_5ghz_rates[] = {
122 	RATE(60, HW_RATE_INDEX_6MBPS, 0),
123 	RATE(90, HW_RATE_INDEX_9MBPS, 0),
124 	RATE(120, HW_RATE_INDEX_12MBPS, 0),
125 	RATE(180, HW_RATE_INDEX_18MBPS, 0),
126 	RATE(240, HW_RATE_INDEX_24MBPS, 0),
127 	RATE(360, HW_RATE_INDEX_36MBPS, 0),
128 	RATE(480, HW_RATE_INDEX_48MBPS, 0),
129 	RATE(540, HW_RATE_INDEX_54MBPS, 0)
130 };
131 
132 static struct ieee80211_supported_band wcn_band_2ghz = {
133 	.channels	= wcn_2ghz_channels,
134 	.n_channels	= ARRAY_SIZE(wcn_2ghz_channels),
135 	.bitrates	= wcn_2ghz_rates,
136 	.n_bitrates	= ARRAY_SIZE(wcn_2ghz_rates),
137 	.ht_cap		= {
138 		.cap =	IEEE80211_HT_CAP_GRN_FLD |
139 			IEEE80211_HT_CAP_SGI_20 |
140 			IEEE80211_HT_CAP_DSSSCCK40 |
141 			IEEE80211_HT_CAP_LSIG_TXOP_PROT |
142 			IEEE80211_HT_CAP_SGI_40 |
143 			IEEE80211_HT_CAP_SUP_WIDTH_20_40,
144 		.ht_supported = true,
145 		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
146 		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
147 		.mcs = {
148 			.rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
149 			.rx_highest = cpu_to_le16(72),
150 			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
151 		}
152 	}
153 };
154 
155 static struct ieee80211_supported_band wcn_band_5ghz = {
156 	.channels	= wcn_5ghz_channels,
157 	.n_channels	= ARRAY_SIZE(wcn_5ghz_channels),
158 	.bitrates	= wcn_5ghz_rates,
159 	.n_bitrates	= ARRAY_SIZE(wcn_5ghz_rates),
160 	.ht_cap		= {
161 		.cap =	IEEE80211_HT_CAP_GRN_FLD |
162 			IEEE80211_HT_CAP_SGI_20 |
163 			IEEE80211_HT_CAP_DSSSCCK40 |
164 			IEEE80211_HT_CAP_LSIG_TXOP_PROT |
165 			IEEE80211_HT_CAP_SGI_40 |
166 			IEEE80211_HT_CAP_SUP_WIDTH_20_40,
167 		.ht_supported = true,
168 		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
169 		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
170 		.mcs = {
171 			.rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
172 			.rx_highest = cpu_to_le16(150),
173 			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
174 		}
175 	}
176 };
177 
178 #ifdef CONFIG_PM
179 
180 static const struct wiphy_wowlan_support wowlan_support = {
181 	.flags = WIPHY_WOWLAN_ANY	|
182 		 WIPHY_WOWLAN_MAGIC_PKT	|
183 		 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
184 };
185 
186 #endif
187 
188 static inline u8 get_sta_index(struct ieee80211_vif *vif,
189 			       struct wcn36xx_sta *sta_priv)
190 {
191 	return NL80211_IFTYPE_STATION == vif->type ?
192 	       sta_priv->bss_sta_index :
193 	       sta_priv->sta_index;
194 }
195 
196 static void wcn36xx_feat_caps_info(struct wcn36xx *wcn)
197 {
198 	int i;
199 
200 	for (i = 0; i < MAX_FEATURE_SUPPORTED; i++) {
201 		if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, i)) {
202 			wcn36xx_dbg(WCN36XX_DBG_MAC, "FW Cap %s\n",
203 				    wcn36xx_firmware_get_cap_name(i));
204 		}
205 	}
206 }
207 
208 static int wcn36xx_start(struct ieee80211_hw *hw)
209 {
210 	struct wcn36xx *wcn = hw->priv;
211 	int ret;
212 
213 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac start\n");
214 
215 	/* SMD initialization */
216 	ret = wcn36xx_smd_open(wcn);
217 	if (ret) {
218 		wcn36xx_err("Failed to open smd channel: %d\n", ret);
219 		goto out_err;
220 	}
221 
222 	/* Allocate memory pools for Mgmt BD headers and Data BD headers */
223 	ret = wcn36xx_dxe_allocate_mem_pools(wcn);
224 	if (ret) {
225 		wcn36xx_err("Failed to alloc DXE mempool: %d\n", ret);
226 		goto out_smd_close;
227 	}
228 
229 	ret = wcn36xx_dxe_alloc_ctl_blks(wcn);
230 	if (ret) {
231 		wcn36xx_err("Failed to alloc DXE ctl blocks: %d\n", ret);
232 		goto out_free_dxe_pool;
233 	}
234 
235 	ret = wcn36xx_smd_load_nv(wcn);
236 	if (ret) {
237 		wcn36xx_err("Failed to push NV to chip\n");
238 		goto out_free_dxe_ctl;
239 	}
240 
241 	ret = wcn36xx_smd_start(wcn);
242 	if (ret) {
243 		wcn36xx_err("Failed to start chip\n");
244 		goto out_free_dxe_ctl;
245 	}
246 
247 	if (!wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
248 		ret = wcn36xx_smd_feature_caps_exchange(wcn);
249 		if (ret)
250 			wcn36xx_warn("Exchange feature caps failed\n");
251 		else
252 			wcn36xx_feat_caps_info(wcn);
253 	}
254 
255 	/* DMA channel initialization */
256 	ret = wcn36xx_dxe_init(wcn);
257 	if (ret) {
258 		wcn36xx_err("DXE init failed\n");
259 		goto out_smd_stop;
260 	}
261 
262 	wcn36xx_debugfs_init(wcn);
263 
264 	INIT_LIST_HEAD(&wcn->vif_list);
265 	spin_lock_init(&wcn->dxe_lock);
266 	spin_lock_init(&wcn->survey_lock);
267 
268 	return 0;
269 
270 out_smd_stop:
271 	wcn36xx_smd_stop(wcn);
272 out_free_dxe_ctl:
273 	wcn36xx_dxe_free_ctl_blks(wcn);
274 out_free_dxe_pool:
275 	wcn36xx_dxe_free_mem_pools(wcn);
276 out_smd_close:
277 	wcn36xx_smd_close(wcn);
278 out_err:
279 	return ret;
280 }
281 
282 static void wcn36xx_stop(struct ieee80211_hw *hw)
283 {
284 	struct wcn36xx *wcn = hw->priv;
285 
286 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac stop\n");
287 
288 	mutex_lock(&wcn->scan_lock);
289 	if (wcn->scan_req) {
290 		struct cfg80211_scan_info scan_info = {
291 			.aborted = true,
292 		};
293 
294 		ieee80211_scan_completed(wcn->hw, &scan_info);
295 	}
296 	wcn->scan_req = NULL;
297 	mutex_unlock(&wcn->scan_lock);
298 
299 	wcn36xx_debugfs_exit(wcn);
300 	wcn36xx_smd_stop(wcn);
301 	wcn36xx_dxe_deinit(wcn);
302 	wcn36xx_smd_close(wcn);
303 
304 	wcn36xx_dxe_free_mem_pools(wcn);
305 	wcn36xx_dxe_free_ctl_blks(wcn);
306 }
307 
308 static void wcn36xx_change_ps(struct wcn36xx *wcn, bool enable)
309 {
310 	struct ieee80211_vif *vif = NULL;
311 	struct wcn36xx_vif *tmp;
312 
313 	list_for_each_entry(tmp, &wcn->vif_list, list) {
314 		vif = wcn36xx_priv_to_vif(tmp);
315 		if (enable && !wcn->sw_scan) {
316 			if (vif->cfg.ps) /* ps allowed ? */
317 				wcn36xx_pmc_enter_bmps_state(wcn, vif);
318 		} else {
319 			wcn36xx_pmc_exit_bmps_state(wcn, vif);
320 		}
321 	}
322 }
323 
324 static void wcn36xx_change_opchannel(struct wcn36xx *wcn, int ch)
325 {
326 	struct ieee80211_vif *vif = NULL;
327 	struct wcn36xx_vif *tmp;
328 	struct ieee80211_supported_band *band;
329 	struct ieee80211_channel *channel = NULL;
330 	unsigned long flags;
331 	int i, j;
332 
333 	for (i = 0; i < ARRAY_SIZE(wcn->hw->wiphy->bands); i++) {
334 		band = wcn->hw->wiphy->bands[i];
335 		if (!band)
336 			break;
337 		for (j = 0; j < band->n_channels; j++) {
338 			if (HW_VALUE_CHANNEL(band->channels[j].hw_value) == ch) {
339 				channel = &band->channels[j];
340 				break;
341 			}
342 		}
343 		if (channel)
344 			break;
345 	}
346 
347 	if (!channel) {
348 		wcn36xx_err("Cannot tune to channel %d\n", ch);
349 		return;
350 	}
351 
352 	spin_lock_irqsave(&wcn->survey_lock, flags);
353 	wcn->band = band;
354 	wcn->channel = channel;
355 	spin_unlock_irqrestore(&wcn->survey_lock, flags);
356 
357 	list_for_each_entry(tmp, &wcn->vif_list, list) {
358 		vif = wcn36xx_priv_to_vif(tmp);
359 		wcn36xx_smd_switch_channel(wcn, vif, ch);
360 	}
361 
362 	return;
363 }
364 
365 static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
366 {
367 	struct wcn36xx *wcn = hw->priv;
368 	int ret;
369 
370 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac config changed 0x%08x\n", changed);
371 
372 	mutex_lock(&wcn->conf_mutex);
373 
374 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
375 		int ch = WCN36XX_HW_CHANNEL(wcn);
376 		wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n",
377 			    ch);
378 
379 		if (wcn->sw_scan_opchannel == ch && wcn->sw_scan_channel) {
380 			/* If channel is the initial operating channel, we may
381 			 * want to receive/transmit regular data packets, then
382 			 * simply stop the scan session and exit PS mode.
383 			 */
384 			if (wcn->sw_scan_channel)
385 				wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
386 			if (wcn->sw_scan_init) {
387 				wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN,
388 							wcn->sw_scan_vif);
389 			}
390 		} else if (wcn->sw_scan) {
391 			/* A scan is ongoing, do not change the operating
392 			 * channel, but start a scan session on the channel.
393 			 */
394 			if (wcn->sw_scan_channel)
395 				wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
396 			if (!wcn->sw_scan_init) {
397 				/* This can fail if we are unable to notify the
398 				 * operating channel.
399 				 */
400 				ret = wcn36xx_smd_init_scan(wcn,
401 							    HAL_SYS_MODE_SCAN,
402 							    wcn->sw_scan_vif);
403 				if (ret) {
404 					mutex_unlock(&wcn->conf_mutex);
405 					return -EIO;
406 				}
407 			}
408 			wcn36xx_smd_start_scan(wcn, ch);
409 		} else {
410 			wcn36xx_change_opchannel(wcn, ch);
411 		}
412 	}
413 
414 	if (changed & IEEE80211_CONF_CHANGE_PS)
415 		wcn36xx_change_ps(wcn, hw->conf.flags & IEEE80211_CONF_PS);
416 
417 	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
418 		if (hw->conf.flags & IEEE80211_CONF_IDLE)
419 			wcn36xx_smd_enter_imps(wcn);
420 		else
421 			wcn36xx_smd_exit_imps(wcn);
422 	}
423 
424 	mutex_unlock(&wcn->conf_mutex);
425 
426 	return 0;
427 }
428 
429 static void wcn36xx_configure_filter(struct ieee80211_hw *hw,
430 				     unsigned int changed,
431 				     unsigned int *total, u64 multicast)
432 {
433 	struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
434 	struct wcn36xx *wcn = hw->priv;
435 	struct wcn36xx_vif *tmp;
436 	struct ieee80211_vif *vif = NULL;
437 
438 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac configure filter\n");
439 
440 	mutex_lock(&wcn->conf_mutex);
441 
442 	*total &= FIF_ALLMULTI;
443 
444 	fp = (void *)(unsigned long)multicast;
445 	list_for_each_entry(tmp, &wcn->vif_list, list) {
446 		vif = wcn36xx_priv_to_vif(tmp);
447 
448 		/* FW handles MC filtering only when connected as STA */
449 		if (*total & FIF_ALLMULTI)
450 			wcn36xx_smd_set_mc_list(wcn, vif, NULL);
451 		else if (NL80211_IFTYPE_STATION == vif->type && tmp->sta_assoc)
452 			wcn36xx_smd_set_mc_list(wcn, vif, fp);
453 	}
454 
455 	mutex_unlock(&wcn->conf_mutex);
456 	kfree(fp);
457 }
458 
459 static u64 wcn36xx_prepare_multicast(struct ieee80211_hw *hw,
460 				     struct netdev_hw_addr_list *mc_list)
461 {
462 	struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
463 	struct netdev_hw_addr *ha;
464 
465 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac prepare multicast list\n");
466 	fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
467 	if (!fp) {
468 		wcn36xx_err("Out of memory setting filters.\n");
469 		return 0;
470 	}
471 
472 	fp->mc_addr_count = 0;
473 	/* update multicast filtering parameters */
474 	if (netdev_hw_addr_list_count(mc_list) <=
475 	    WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS) {
476 		netdev_hw_addr_list_for_each(ha, mc_list) {
477 			memcpy(fp->mc_addr[fp->mc_addr_count],
478 					ha->addr, ETH_ALEN);
479 			fp->mc_addr_count++;
480 		}
481 	}
482 
483 	return (u64)(unsigned long)fp;
484 }
485 
486 static void wcn36xx_tx(struct ieee80211_hw *hw,
487 		       struct ieee80211_tx_control *control,
488 		       struct sk_buff *skb)
489 {
490 	struct wcn36xx *wcn = hw->priv;
491 	struct wcn36xx_sta *sta_priv = NULL;
492 
493 	if (control->sta)
494 		sta_priv = wcn36xx_sta_to_priv(control->sta);
495 
496 	if (wcn36xx_start_tx(wcn, sta_priv, skb))
497 		ieee80211_free_txskb(wcn->hw, skb);
498 }
499 
500 static int wcn36xx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
501 			   struct ieee80211_vif *vif,
502 			   struct ieee80211_sta *sta,
503 			   struct ieee80211_key_conf *key_conf)
504 {
505 	struct wcn36xx *wcn = hw->priv;
506 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
507 	struct wcn36xx_sta *sta_priv = sta ? wcn36xx_sta_to_priv(sta) : NULL;
508 	int ret = 0;
509 	u8 key[WLAN_MAX_KEY_LEN];
510 
511 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac80211 set key\n");
512 	wcn36xx_dbg(WCN36XX_DBG_MAC, "Key: cmd=0x%x algo:0x%x, id:%d, len:%d flags 0x%x\n",
513 		    cmd, key_conf->cipher, key_conf->keyidx,
514 		    key_conf->keylen, key_conf->flags);
515 	wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "KEY: ",
516 			 key_conf->key,
517 			 key_conf->keylen);
518 
519 	mutex_lock(&wcn->conf_mutex);
520 
521 	switch (key_conf->cipher) {
522 	case WLAN_CIPHER_SUITE_WEP40:
523 		vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP40;
524 		break;
525 	case WLAN_CIPHER_SUITE_WEP104:
526 		vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP104;
527 		break;
528 	case WLAN_CIPHER_SUITE_CCMP:
529 		vif_priv->encrypt_type = WCN36XX_HAL_ED_CCMP;
530 		break;
531 	case WLAN_CIPHER_SUITE_TKIP:
532 		vif_priv->encrypt_type = WCN36XX_HAL_ED_TKIP;
533 		break;
534 	default:
535 		wcn36xx_err("Unsupported key type 0x%x\n",
536 			      key_conf->cipher);
537 		ret = -EOPNOTSUPP;
538 		goto out;
539 	}
540 
541 	switch (cmd) {
542 	case SET_KEY:
543 		if (WCN36XX_HAL_ED_TKIP == vif_priv->encrypt_type) {
544 			/*
545 			 * Supplicant is sending key in the wrong order:
546 			 * Temporal Key (16 b) - TX MIC (8 b) - RX MIC (8 b)
547 			 * but HW expects it to be in the order as described in
548 			 * IEEE 802.11 spec (see chapter 11.7) like this:
549 			 * Temporal Key (16 b) - RX MIC (8 b) - TX MIC (8 b)
550 			 */
551 			memcpy(key, key_conf->key, 16);
552 			memcpy(key + 16, key_conf->key + 24, 8);
553 			memcpy(key + 24, key_conf->key + 16, 8);
554 		} else {
555 			memcpy(key, key_conf->key, key_conf->keylen);
556 		}
557 
558 		if (IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags) {
559 			sta_priv->is_data_encrypted = true;
560 			/* Reconfigure bss with encrypt_type */
561 			if (NL80211_IFTYPE_STATION == vif->type) {
562 				wcn36xx_smd_config_bss(wcn,
563 						       vif,
564 						       sta,
565 						       sta->addr,
566 						       true);
567 				wcn36xx_smd_config_sta(wcn, vif, sta);
568 			}
569 
570 			wcn36xx_smd_set_stakey(wcn,
571 				vif_priv->encrypt_type,
572 				key_conf->keyidx,
573 				key_conf->keylen,
574 				key,
575 				get_sta_index(vif, sta_priv));
576 		} else {
577 			wcn36xx_smd_set_bsskey(wcn,
578 				vif_priv->encrypt_type,
579 				vif_priv->bss_index,
580 				key_conf->keyidx,
581 				key_conf->keylen,
582 				key);
583 
584 			if ((WLAN_CIPHER_SUITE_WEP40 == key_conf->cipher) ||
585 			    (WLAN_CIPHER_SUITE_WEP104 == key_conf->cipher)) {
586 				list_for_each_entry(sta_priv,
587 						    &vif_priv->sta_list, list) {
588 					sta_priv->is_data_encrypted = true;
589 					wcn36xx_smd_set_stakey(wcn,
590 						vif_priv->encrypt_type,
591 						key_conf->keyidx,
592 						key_conf->keylen,
593 						key,
594 						get_sta_index(vif, sta_priv));
595 				}
596 			}
597 		}
598 		break;
599 	case DISABLE_KEY:
600 		if (!(IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags)) {
601 			if (vif_priv->bss_index != WCN36XX_HAL_BSS_INVALID_IDX)
602 				wcn36xx_smd_remove_bsskey(wcn,
603 					vif_priv->encrypt_type,
604 					vif_priv->bss_index,
605 					key_conf->keyidx);
606 
607 			vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
608 		} else {
609 			sta_priv->is_data_encrypted = false;
610 			/* do not remove key if disassociated */
611 			if (sta_priv->aid)
612 				wcn36xx_smd_remove_stakey(wcn,
613 					vif_priv->encrypt_type,
614 					key_conf->keyidx,
615 					get_sta_index(vif, sta_priv));
616 		}
617 		break;
618 	default:
619 		wcn36xx_err("Unsupported key cmd 0x%x\n", cmd);
620 		ret = -EOPNOTSUPP;
621 		goto out;
622 	}
623 
624 out:
625 	mutex_unlock(&wcn->conf_mutex);
626 
627 	return ret;
628 }
629 
630 static int wcn36xx_hw_scan(struct ieee80211_hw *hw,
631 			   struct ieee80211_vif *vif,
632 			   struct ieee80211_scan_request *hw_req)
633 {
634 	struct wcn36xx *wcn = hw->priv;
635 
636 	if (!wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
637 		/* fallback to mac80211 software scan */
638 		return 1;
639 	}
640 
641 	/* Firmware scan offload is limited to 48 channels, fallback to
642 	 * software driven scanning otherwise.
643 	 */
644 	if (hw_req->req.n_channels > 48) {
645 		wcn36xx_warn("Offload scan aborted, n_channels=%u",
646 			     hw_req->req.n_channels);
647 		return 1;
648 	}
649 
650 	mutex_lock(&wcn->scan_lock);
651 	if (wcn->scan_req) {
652 		mutex_unlock(&wcn->scan_lock);
653 		return -EBUSY;
654 	}
655 
656 	wcn->scan_aborted = false;
657 	wcn->scan_req = &hw_req->req;
658 
659 	mutex_unlock(&wcn->scan_lock);
660 
661 	wcn36xx_smd_update_channel_list(wcn, &hw_req->req);
662 	return wcn36xx_smd_start_hw_scan(wcn, vif, &hw_req->req);
663 }
664 
665 static void wcn36xx_cancel_hw_scan(struct ieee80211_hw *hw,
666 				   struct ieee80211_vif *vif)
667 {
668 	struct wcn36xx *wcn = hw->priv;
669 
670 	mutex_lock(&wcn->scan_lock);
671 	wcn->scan_aborted = true;
672 	mutex_unlock(&wcn->scan_lock);
673 
674 	if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
675 		/* ieee80211_scan_completed will be called on FW scan
676 		 * indication */
677 		wcn36xx_smd_stop_hw_scan(wcn);
678 	}
679 }
680 
681 static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw,
682 				  struct ieee80211_vif *vif,
683 				  const u8 *mac_addr)
684 {
685 	struct wcn36xx *wcn = hw->priv;
686 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
687 
688 	wcn36xx_dbg(WCN36XX_DBG_MAC, "sw_scan_start");
689 
690 	wcn->sw_scan = true;
691 	wcn->sw_scan_vif = vif;
692 	wcn->sw_scan_channel = 0;
693 	if (vif_priv->sta_assoc)
694 		wcn->sw_scan_opchannel = WCN36XX_HW_CHANNEL(wcn);
695 	else
696 		wcn->sw_scan_opchannel = 0;
697 }
698 
699 static void wcn36xx_sw_scan_complete(struct ieee80211_hw *hw,
700 				     struct ieee80211_vif *vif)
701 {
702 	struct wcn36xx *wcn = hw->priv;
703 
704 	wcn36xx_dbg(WCN36XX_DBG_MAC, "sw_scan_complete");
705 
706 	/* ensure that any scan session is finished */
707 	if (wcn->sw_scan_channel)
708 		wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
709 	if (wcn->sw_scan_init) {
710 		wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN,
711 					wcn->sw_scan_vif);
712 	}
713 	wcn->sw_scan = false;
714 	wcn->sw_scan_opchannel = 0;
715 }
716 
717 static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta,
718 					 enum nl80211_band band)
719 {
720 	int i, size;
721 	u16 *rates_table;
722 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
723 	u32 rates = sta->deflink.supp_rates[band];
724 
725 	memset(&sta_priv->supported_rates, 0,
726 		sizeof(sta_priv->supported_rates));
727 	sta_priv->supported_rates.op_rate_mode = STA_11n;
728 
729 	size = ARRAY_SIZE(sta_priv->supported_rates.dsss_rates);
730 	rates_table = sta_priv->supported_rates.dsss_rates;
731 	if (band == NL80211_BAND_2GHZ) {
732 		for (i = 0; i < size; i++) {
733 			if (rates & 0x01) {
734 				rates_table[i] = wcn_2ghz_rates[i].hw_value;
735 				rates = rates >> 1;
736 			}
737 		}
738 	}
739 
740 	size = ARRAY_SIZE(sta_priv->supported_rates.ofdm_rates);
741 	rates_table = sta_priv->supported_rates.ofdm_rates;
742 	for (i = 0; i < size; i++) {
743 		if (rates & 0x01) {
744 			rates_table[i] = wcn_5ghz_rates[i].hw_value;
745 			rates = rates >> 1;
746 		}
747 	}
748 
749 	if (sta->deflink.ht_cap.ht_supported) {
750 		BUILD_BUG_ON(sizeof(sta->deflink.ht_cap.mcs.rx_mask) >
751 			     sizeof(sta_priv->supported_rates.supported_mcs_set));
752 		memcpy(sta_priv->supported_rates.supported_mcs_set,
753 		       sta->deflink.ht_cap.mcs.rx_mask,
754 		       sizeof(sta->deflink.ht_cap.mcs.rx_mask));
755 	}
756 
757 	if (sta->deflink.vht_cap.vht_supported) {
758 		sta_priv->supported_rates.op_rate_mode = STA_11ac;
759 		sta_priv->supported_rates.vht_rx_mcs_map =
760 				sta->deflink.vht_cap.vht_mcs.rx_mcs_map;
761 		sta_priv->supported_rates.vht_tx_mcs_map =
762 				sta->deflink.vht_cap.vht_mcs.tx_mcs_map;
763 	}
764 }
765 
766 void wcn36xx_set_default_rates(struct wcn36xx_hal_supported_rates *rates)
767 {
768 	u16 ofdm_rates[WCN36XX_HAL_NUM_OFDM_RATES] = {
769 		HW_RATE_INDEX_6MBPS,
770 		HW_RATE_INDEX_9MBPS,
771 		HW_RATE_INDEX_12MBPS,
772 		HW_RATE_INDEX_18MBPS,
773 		HW_RATE_INDEX_24MBPS,
774 		HW_RATE_INDEX_36MBPS,
775 		HW_RATE_INDEX_48MBPS,
776 		HW_RATE_INDEX_54MBPS
777 	};
778 	u16 dsss_rates[WCN36XX_HAL_NUM_DSSS_RATES] = {
779 		HW_RATE_INDEX_1MBPS,
780 		HW_RATE_INDEX_2MBPS,
781 		HW_RATE_INDEX_5_5MBPS,
782 		HW_RATE_INDEX_11MBPS
783 	};
784 
785 	rates->op_rate_mode = STA_11n;
786 	memcpy(rates->dsss_rates, dsss_rates,
787 		sizeof(*dsss_rates) * WCN36XX_HAL_NUM_DSSS_RATES);
788 	memcpy(rates->ofdm_rates, ofdm_rates,
789 		sizeof(*ofdm_rates) * WCN36XX_HAL_NUM_OFDM_RATES);
790 	rates->supported_mcs_set[0] = 0xFF;
791 }
792 
793 void wcn36xx_set_default_rates_v1(struct wcn36xx_hal_supported_rates_v1 *rates)
794 {
795 	rates->op_rate_mode = STA_11ac;
796 	rates->vht_rx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
797 	rates->vht_tx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
798 }
799 
800 static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw,
801 				     struct ieee80211_vif *vif,
802 				     struct ieee80211_bss_conf *bss_conf,
803 				     u64 changed)
804 {
805 	struct wcn36xx *wcn = hw->priv;
806 	struct sk_buff *skb = NULL;
807 	u16 tim_off, tim_len;
808 	enum wcn36xx_hal_link_state link_state;
809 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
810 
811 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss info changed vif %p changed 0x%llx\n",
812 		    vif, changed);
813 
814 	mutex_lock(&wcn->conf_mutex);
815 
816 	if (changed & BSS_CHANGED_BEACON_INFO) {
817 		wcn36xx_dbg(WCN36XX_DBG_MAC,
818 			    "mac bss changed dtim period %d\n",
819 			    bss_conf->dtim_period);
820 
821 		vif_priv->dtim_period = bss_conf->dtim_period;
822 	}
823 
824 	if (changed & BSS_CHANGED_BSSID) {
825 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed_bssid %pM\n",
826 			    bss_conf->bssid);
827 
828 		if (!is_zero_ether_addr(bss_conf->bssid)) {
829 			vif_priv->is_joining = true;
830 			vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
831 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
832 						WCN36XX_HAL_LINK_PREASSOC_STATE);
833 			wcn36xx_smd_join(wcn, bss_conf->bssid,
834 					 vif->addr, WCN36XX_HW_CHANNEL(wcn));
835 			wcn36xx_smd_config_bss(wcn, vif, NULL,
836 					       bss_conf->bssid, false);
837 		} else {
838 			vif_priv->is_joining = false;
839 			wcn36xx_smd_delete_bss(wcn, vif);
840 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
841 						WCN36XX_HAL_LINK_IDLE_STATE);
842 			vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
843 		}
844 	}
845 
846 	if (changed & BSS_CHANGED_SSID) {
847 		wcn36xx_dbg(WCN36XX_DBG_MAC,
848 			    "mac bss changed ssid\n");
849 		wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "ssid ",
850 				 vif->cfg.ssid, vif->cfg.ssid_len);
851 
852 		vif_priv->ssid.length = vif->cfg.ssid_len;
853 		memcpy(&vif_priv->ssid.ssid,
854 		       vif->cfg.ssid,
855 		       vif->cfg.ssid_len);
856 	}
857 
858 	if (changed & BSS_CHANGED_ASSOC) {
859 		vif_priv->is_joining = false;
860 		if (vif->cfg.assoc) {
861 			struct ieee80211_sta *sta;
862 			struct wcn36xx_sta *sta_priv;
863 
864 			wcn36xx_dbg(WCN36XX_DBG_MAC,
865 				    "mac assoc bss %pM vif %pM AID=%d\n",
866 				     bss_conf->bssid,
867 				     vif->addr,
868 				     vif->cfg.aid);
869 
870 			vif_priv->sta_assoc = true;
871 
872 			/*
873 			 * Holding conf_mutex ensures mutal exclusion with
874 			 * wcn36xx_sta_remove() and as such ensures that sta
875 			 * won't be freed while we're operating on it. As such
876 			 * we do not need to hold the rcu_read_lock().
877 			 */
878 			sta = ieee80211_find_sta(vif, bss_conf->bssid);
879 			if (!sta) {
880 				wcn36xx_err("sta %pM is not found\n",
881 					      bss_conf->bssid);
882 				goto out;
883 			}
884 			sta_priv = wcn36xx_sta_to_priv(sta);
885 
886 			wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
887 
888 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid,
889 				vif->addr,
890 				WCN36XX_HAL_LINK_POSTASSOC_STATE);
891 			wcn36xx_smd_config_bss(wcn, vif, sta,
892 					       bss_conf->bssid,
893 					       true);
894 			sta_priv->aid = vif->cfg.aid;
895 			/*
896 			 * config_sta must be called from  because this is the
897 			 * place where AID is available.
898 			 */
899 			wcn36xx_smd_config_sta(wcn, vif, sta);
900 			if (vif->type == NL80211_IFTYPE_STATION)
901 				wcn36xx_smd_add_beacon_filter(wcn, vif);
902 			wcn36xx_enable_keep_alive_null_packet(wcn, vif);
903 		} else {
904 			wcn36xx_dbg(WCN36XX_DBG_MAC,
905 				    "disassociated bss %pM vif %pM AID=%d\n",
906 				    bss_conf->bssid,
907 				    vif->addr,
908 				    vif->cfg.aid);
909 			vif_priv->sta_assoc = false;
910 			wcn36xx_smd_set_link_st(wcn,
911 						bss_conf->bssid,
912 						vif->addr,
913 						WCN36XX_HAL_LINK_IDLE_STATE);
914 		}
915 	}
916 
917 	if (changed & BSS_CHANGED_AP_PROBE_RESP) {
918 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed ap probe resp\n");
919 		skb = ieee80211_proberesp_get(hw, vif);
920 		if (!skb) {
921 			wcn36xx_err("failed to alloc probereq skb\n");
922 			goto out;
923 		}
924 
925 		wcn36xx_smd_update_proberesp_tmpl(wcn, vif, skb);
926 		dev_kfree_skb(skb);
927 	}
928 
929 	if (changed & BSS_CHANGED_BEACON_ENABLED ||
930 	    changed & BSS_CHANGED_BEACON) {
931 		wcn36xx_dbg(WCN36XX_DBG_MAC,
932 			    "mac bss changed beacon enabled %d\n",
933 			    bss_conf->enable_beacon);
934 
935 		if (bss_conf->enable_beacon) {
936 			vif_priv->dtim_period = bss_conf->dtim_period;
937 			vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
938 			wcn36xx_smd_config_bss(wcn, vif, NULL,
939 					       vif->addr, false);
940 			skb = ieee80211_beacon_get_tim(hw, vif, &tim_off,
941 						       &tim_len, 0);
942 			if (!skb) {
943 				wcn36xx_err("failed to alloc beacon skb\n");
944 				goto out;
945 			}
946 			wcn36xx_smd_send_beacon(wcn, vif, skb, tim_off, 0);
947 			dev_kfree_skb(skb);
948 
949 			if (vif->type == NL80211_IFTYPE_ADHOC ||
950 			    vif->type == NL80211_IFTYPE_MESH_POINT)
951 				link_state = WCN36XX_HAL_LINK_IBSS_STATE;
952 			else
953 				link_state = WCN36XX_HAL_LINK_AP_STATE;
954 
955 			wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
956 						link_state);
957 		} else {
958 			wcn36xx_smd_delete_bss(wcn, vif);
959 			wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
960 						WCN36XX_HAL_LINK_IDLE_STATE);
961 		}
962 	}
963 out:
964 
965 	mutex_unlock(&wcn->conf_mutex);
966 }
967 
968 /* this is required when using IEEE80211_HW_HAS_RATE_CONTROL */
969 static int wcn36xx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
970 {
971 	struct wcn36xx *wcn = hw->priv;
972 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac set RTS threshold %d\n", value);
973 
974 	mutex_lock(&wcn->conf_mutex);
975 	wcn36xx_smd_update_cfg(wcn, WCN36XX_HAL_CFG_RTS_THRESHOLD, value);
976 	mutex_unlock(&wcn->conf_mutex);
977 
978 	return 0;
979 }
980 
981 static void wcn36xx_remove_interface(struct ieee80211_hw *hw,
982 				     struct ieee80211_vif *vif)
983 {
984 	struct wcn36xx *wcn = hw->priv;
985 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
986 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac remove interface vif %p\n", vif);
987 
988 	mutex_lock(&wcn->conf_mutex);
989 
990 	list_del(&vif_priv->list);
991 	wcn36xx_smd_delete_sta_self(wcn, vif->addr);
992 
993 	mutex_unlock(&wcn->conf_mutex);
994 }
995 
996 static int wcn36xx_add_interface(struct ieee80211_hw *hw,
997 				 struct ieee80211_vif *vif)
998 {
999 	struct wcn36xx *wcn = hw->priv;
1000 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1001 
1002 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac add interface vif %p type %d\n",
1003 		    vif, vif->type);
1004 
1005 	if (!(NL80211_IFTYPE_STATION == vif->type ||
1006 	      NL80211_IFTYPE_AP == vif->type ||
1007 	      NL80211_IFTYPE_ADHOC == vif->type ||
1008 	      NL80211_IFTYPE_MESH_POINT == vif->type)) {
1009 		wcn36xx_warn("Unsupported interface type requested: %d\n",
1010 			     vif->type);
1011 		return -EOPNOTSUPP;
1012 	}
1013 
1014 	mutex_lock(&wcn->conf_mutex);
1015 
1016 	vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
1017 	INIT_LIST_HEAD(&vif_priv->sta_list);
1018 	list_add(&vif_priv->list, &wcn->vif_list);
1019 	wcn36xx_smd_add_sta_self(wcn, vif);
1020 
1021 	mutex_unlock(&wcn->conf_mutex);
1022 
1023 	return 0;
1024 }
1025 
1026 static int wcn36xx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1027 			   struct ieee80211_sta *sta)
1028 {
1029 	struct wcn36xx *wcn = hw->priv;
1030 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1031 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1032 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta add vif %p sta %pM\n",
1033 		    vif, sta->addr);
1034 
1035 	mutex_lock(&wcn->conf_mutex);
1036 
1037 	spin_lock_init(&sta_priv->ampdu_lock);
1038 	sta_priv->vif = vif_priv;
1039 	list_add(&sta_priv->list, &vif_priv->sta_list);
1040 
1041 	/*
1042 	 * For STA mode HW will be configured on BSS_CHANGED_ASSOC because
1043 	 * at this stage AID is not available yet.
1044 	 */
1045 	if (NL80211_IFTYPE_STATION != vif->type) {
1046 		wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
1047 		sta_priv->aid = sta->aid;
1048 		wcn36xx_smd_config_sta(wcn, vif, sta);
1049 	}
1050 
1051 	mutex_unlock(&wcn->conf_mutex);
1052 
1053 	return 0;
1054 }
1055 
1056 static int wcn36xx_sta_remove(struct ieee80211_hw *hw,
1057 			      struct ieee80211_vif *vif,
1058 			      struct ieee80211_sta *sta)
1059 {
1060 	struct wcn36xx *wcn = hw->priv;
1061 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1062 
1063 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta remove vif %p sta %pM index %d\n",
1064 		    vif, sta->addr, sta_priv->sta_index);
1065 
1066 	mutex_lock(&wcn->conf_mutex);
1067 
1068 	list_del(&sta_priv->list);
1069 	wcn36xx_smd_delete_sta(wcn, sta_priv->sta_index);
1070 	sta_priv->vif = NULL;
1071 
1072 	mutex_unlock(&wcn->conf_mutex);
1073 
1074 	return 0;
1075 }
1076 
1077 #ifdef CONFIG_PM
1078 
1079 static struct ieee80211_vif *wcn36xx_get_first_assoc_vif(struct wcn36xx *wcn)
1080 {
1081 	struct wcn36xx_vif *vif_priv = NULL;
1082 	struct ieee80211_vif *vif = NULL;
1083 
1084 	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
1085 		if (vif_priv->sta_assoc) {
1086 			vif = wcn36xx_priv_to_vif(vif_priv);
1087 			break;
1088 		}
1089 	}
1090 	return vif;
1091 }
1092 
1093 static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
1094 {
1095 	struct wcn36xx *wcn = hw->priv;
1096 	struct ieee80211_vif *vif = NULL;
1097 	int ret = 0;
1098 
1099 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac suspend\n");
1100 
1101 	mutex_lock(&wcn->conf_mutex);
1102 
1103 	vif = wcn36xx_get_first_assoc_vif(wcn);
1104 	if (vif) {
1105 		ret = wcn36xx_smd_arp_offload(wcn, vif, true);
1106 		if (ret)
1107 			goto out;
1108 		ret = wcn36xx_smd_ipv6_ns_offload(wcn, vif, true);
1109 		if (ret)
1110 			goto out;
1111 		ret = wcn36xx_smd_gtk_offload(wcn, vif, true);
1112 		if (ret)
1113 			goto out;
1114 		ret = wcn36xx_smd_set_power_params(wcn, true);
1115 		if (ret)
1116 			goto out;
1117 		ret = wcn36xx_smd_wlan_host_suspend_ind(wcn);
1118 	}
1119 
1120 	/* Disable IRQ, we don't want to handle any packet before mac80211 is
1121 	 * resumed and ready to receive packets.
1122 	 */
1123 	disable_irq(wcn->tx_irq);
1124 	disable_irq(wcn->rx_irq);
1125 
1126 out:
1127 	mutex_unlock(&wcn->conf_mutex);
1128 	return ret;
1129 }
1130 
1131 static int wcn36xx_resume(struct ieee80211_hw *hw)
1132 {
1133 	struct wcn36xx *wcn = hw->priv;
1134 	struct ieee80211_vif *vif = NULL;
1135 
1136 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac resume\n");
1137 
1138 	mutex_lock(&wcn->conf_mutex);
1139 	vif = wcn36xx_get_first_assoc_vif(wcn);
1140 	if (vif) {
1141 		wcn36xx_smd_host_resume(wcn);
1142 		wcn36xx_smd_set_power_params(wcn, false);
1143 		wcn36xx_smd_gtk_offload_get_info(wcn, vif);
1144 		wcn36xx_smd_gtk_offload(wcn, vif, false);
1145 		wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
1146 		wcn36xx_smd_arp_offload(wcn, vif, false);
1147 	}
1148 
1149 	enable_irq(wcn->tx_irq);
1150 	enable_irq(wcn->rx_irq);
1151 
1152 	mutex_unlock(&wcn->conf_mutex);
1153 
1154 	return 0;
1155 }
1156 
1157 static void wcn36xx_set_rekey_data(struct ieee80211_hw *hw,
1158 				   struct ieee80211_vif *vif,
1159 				   struct cfg80211_gtk_rekey_data *data)
1160 {
1161 	struct wcn36xx *wcn = hw->priv;
1162 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1163 
1164 	mutex_lock(&wcn->conf_mutex);
1165 
1166 	memcpy(vif_priv->rekey_data.kek, data->kek, NL80211_KEK_LEN);
1167 	memcpy(vif_priv->rekey_data.kck, data->kck, NL80211_KCK_LEN);
1168 	vif_priv->rekey_data.replay_ctr =
1169 		cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
1170 	vif_priv->rekey_data.valid = true;
1171 
1172 	mutex_unlock(&wcn->conf_mutex);
1173 }
1174 
1175 #endif
1176 
1177 static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
1178 		    struct ieee80211_vif *vif,
1179 		    struct ieee80211_ampdu_params *params)
1180 {
1181 	struct wcn36xx *wcn = hw->priv;
1182 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(params->sta);
1183 	struct ieee80211_sta *sta = params->sta;
1184 	enum ieee80211_ampdu_mlme_action action = params->action;
1185 	u16 tid = params->tid;
1186 	u16 *ssn = &params->ssn;
1187 	int ret = 0;
1188 	int session;
1189 
1190 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu action action %d tid %d\n",
1191 		    action, tid);
1192 
1193 	mutex_lock(&wcn->conf_mutex);
1194 
1195 	switch (action) {
1196 	case IEEE80211_AMPDU_RX_START:
1197 		sta_priv->tid = tid;
1198 		session = wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 0,
1199 						     get_sta_index(vif, sta_priv));
1200 		if (session < 0) {
1201 			ret = session;
1202 			goto out;
1203 		}
1204 		wcn36xx_smd_add_ba(wcn, session);
1205 		break;
1206 	case IEEE80211_AMPDU_RX_STOP:
1207 		wcn36xx_smd_del_ba(wcn, tid, 0, get_sta_index(vif, sta_priv));
1208 		break;
1209 	case IEEE80211_AMPDU_TX_START:
1210 		spin_lock_bh(&sta_priv->ampdu_lock);
1211 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
1212 		spin_unlock_bh(&sta_priv->ampdu_lock);
1213 
1214 		/* Replace the mac80211 ssn with the firmware one */
1215 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu ssn = %u\n", *ssn);
1216 		wcn36xx_smd_trigger_ba(wcn, get_sta_index(vif, sta_priv), tid, ssn);
1217 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu fw-ssn = %u\n", *ssn);
1218 
1219 		/* Start BA session */
1220 		session = wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 1,
1221 						     get_sta_index(vif, sta_priv));
1222 		if (session < 0) {
1223 			ret = session;
1224 			goto out;
1225 		}
1226 		ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1227 		break;
1228 	case IEEE80211_AMPDU_TX_OPERATIONAL:
1229 		spin_lock_bh(&sta_priv->ampdu_lock);
1230 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_OPERATIONAL;
1231 		spin_unlock_bh(&sta_priv->ampdu_lock);
1232 
1233 		break;
1234 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
1235 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1236 	case IEEE80211_AMPDU_TX_STOP_CONT:
1237 		spin_lock_bh(&sta_priv->ampdu_lock);
1238 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_NONE;
1239 		spin_unlock_bh(&sta_priv->ampdu_lock);
1240 
1241 		wcn36xx_smd_del_ba(wcn, tid, 1, get_sta_index(vif, sta_priv));
1242 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1243 		break;
1244 	default:
1245 		wcn36xx_err("Unknown AMPDU action\n");
1246 	}
1247 
1248 out:
1249 	mutex_unlock(&wcn->conf_mutex);
1250 
1251 	return ret;
1252 }
1253 
1254 #if IS_ENABLED(CONFIG_IPV6)
1255 static void wcn36xx_ipv6_addr_change(struct ieee80211_hw *hw,
1256 				     struct ieee80211_vif *vif,
1257 				     struct inet6_dev *idev)
1258 {
1259 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1260 	struct inet6_ifaddr *ifa;
1261 	int idx = 0;
1262 
1263 	memset(vif_priv->tentative_addrs, 0, sizeof(vif_priv->tentative_addrs));
1264 
1265 	read_lock_bh(&idev->lock);
1266 	list_for_each_entry(ifa, &idev->addr_list, if_list) {
1267 		vif_priv->target_ipv6_addrs[idx] = ifa->addr;
1268 		if (ifa->flags & IFA_F_TENTATIVE)
1269 			__set_bit(idx, vif_priv->tentative_addrs);
1270 		idx++;
1271 		if (idx >= WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)
1272 			break;
1273 		wcn36xx_dbg(WCN36XX_DBG_MAC, "%pI6 %s\n", &ifa->addr,
1274 			    (ifa->flags & IFA_F_TENTATIVE) ? "tentative" : NULL);
1275 	}
1276 	read_unlock_bh(&idev->lock);
1277 
1278 	vif_priv->num_target_ipv6_addrs = idx;
1279 }
1280 #endif
1281 
1282 static void wcn36xx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1283 			  u32 queues, bool drop)
1284 {
1285 	struct wcn36xx *wcn = hw->priv;
1286 
1287 	if (wcn36xx_dxe_tx_flush(wcn)) {
1288 		wcn36xx_err("Failed to flush hardware tx queues\n");
1289 	}
1290 }
1291 
1292 static int wcn36xx_get_survey(struct ieee80211_hw *hw, int idx,
1293 			      struct survey_info *survey)
1294 {
1295 	struct wcn36xx *wcn = hw->priv;
1296 	struct ieee80211_supported_band *sband;
1297 	struct wcn36xx_chan_survey *chan_survey;
1298 	int band_idx;
1299 	unsigned long flags;
1300 
1301 	sband = wcn->hw->wiphy->bands[NL80211_BAND_2GHZ];
1302 	band_idx = idx;
1303 	if (band_idx >= sband->n_channels) {
1304 		band_idx -= sband->n_channels;
1305 		sband = wcn->hw->wiphy->bands[NL80211_BAND_5GHZ];
1306 	}
1307 
1308 	if (!sband || band_idx >= sband->n_channels)
1309 		return -ENOENT;
1310 
1311 	spin_lock_irqsave(&wcn->survey_lock, flags);
1312 
1313 	chan_survey = &wcn->chan_survey[idx];
1314 	survey->channel = &sband->channels[band_idx];
1315 	survey->noise = chan_survey->rssi - chan_survey->snr;
1316 	survey->filled = 0;
1317 
1318 	if (chan_survey->rssi > -100 && chan_survey->rssi < 0)
1319 		survey->filled |= SURVEY_INFO_NOISE_DBM;
1320 
1321 	if (survey->channel == wcn->channel)
1322 		survey->filled |= SURVEY_INFO_IN_USE;
1323 
1324 	spin_unlock_irqrestore(&wcn->survey_lock, flags);
1325 
1326 	wcn36xx_dbg(WCN36XX_DBG_MAC,
1327 		    "ch %d rssi %d snr %d noise %d filled %x freq %d\n",
1328 		    HW_VALUE_CHANNEL(survey->channel->hw_value),
1329 		    chan_survey->rssi, chan_survey->snr, survey->noise,
1330 		    survey->filled, survey->channel->center_freq);
1331 
1332 	return 0;
1333 }
1334 
1335 static void wcn36xx_sta_statistics(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1336 				   struct ieee80211_sta *sta, struct station_info *sinfo)
1337 {
1338 	struct wcn36xx *wcn;
1339 	u8 sta_index;
1340 	int status;
1341 
1342 	wcn = hw->priv;
1343 	sta_index = get_sta_index(vif, wcn36xx_sta_to_priv(sta));
1344 	status = wcn36xx_smd_get_stats(wcn, sta_index, HAL_GLOBAL_CLASS_A_STATS_INFO, sinfo);
1345 
1346 	if (status)
1347 		wcn36xx_err("wcn36xx_smd_get_stats failed\n");
1348 }
1349 
1350 static const struct ieee80211_ops wcn36xx_ops = {
1351 	.start			= wcn36xx_start,
1352 	.stop			= wcn36xx_stop,
1353 	.add_interface		= wcn36xx_add_interface,
1354 	.remove_interface	= wcn36xx_remove_interface,
1355 #ifdef CONFIG_PM
1356 	.suspend		= wcn36xx_suspend,
1357 	.resume			= wcn36xx_resume,
1358 	.set_rekey_data		= wcn36xx_set_rekey_data,
1359 #endif
1360 	.config			= wcn36xx_config,
1361 	.prepare_multicast	= wcn36xx_prepare_multicast,
1362 	.configure_filter       = wcn36xx_configure_filter,
1363 	.tx			= wcn36xx_tx,
1364 	.wake_tx_queue		= ieee80211_handle_wake_tx_queue,
1365 	.set_key		= wcn36xx_set_key,
1366 	.hw_scan		= wcn36xx_hw_scan,
1367 	.cancel_hw_scan		= wcn36xx_cancel_hw_scan,
1368 	.sw_scan_start		= wcn36xx_sw_scan_start,
1369 	.sw_scan_complete	= wcn36xx_sw_scan_complete,
1370 	.bss_info_changed	= wcn36xx_bss_info_changed,
1371 	.set_rts_threshold	= wcn36xx_set_rts_threshold,
1372 	.sta_add		= wcn36xx_sta_add,
1373 	.sta_remove		= wcn36xx_sta_remove,
1374 	.sta_statistics		= wcn36xx_sta_statistics,
1375 	.ampdu_action		= wcn36xx_ampdu_action,
1376 #if IS_ENABLED(CONFIG_IPV6)
1377 	.ipv6_addr_change	= wcn36xx_ipv6_addr_change,
1378 #endif
1379 	.flush			= wcn36xx_flush,
1380 	.get_survey		= wcn36xx_get_survey,
1381 
1382 	CFG80211_TESTMODE_CMD(wcn36xx_tm_cmd)
1383 };
1384 
1385 static void
1386 wcn36xx_set_ieee80211_vht_caps(struct ieee80211_sta_vht_cap *vht_cap)
1387 {
1388 	vht_cap->vht_supported = true;
1389 
1390 	vht_cap->cap = (IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
1391 			IEEE80211_VHT_CAP_SHORT_GI_80 |
1392 			IEEE80211_VHT_CAP_RXSTBC_1 |
1393 			IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
1394 			IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE |
1395 			3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
1396 			7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
1397 
1398 	vht_cap->vht_mcs.rx_mcs_map =
1399 		cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 |
1400 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 2 |
1401 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
1402 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
1403 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
1404 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
1405 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
1406 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 14);
1407 
1408 	vht_cap->vht_mcs.rx_highest = cpu_to_le16(433);
1409 	vht_cap->vht_mcs.tx_highest = vht_cap->vht_mcs.rx_highest;
1410 
1411 	vht_cap->vht_mcs.tx_mcs_map = vht_cap->vht_mcs.rx_mcs_map;
1412 }
1413 
1414 static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
1415 {
1416 	static const u32 cipher_suites[] = {
1417 		WLAN_CIPHER_SUITE_WEP40,
1418 		WLAN_CIPHER_SUITE_WEP104,
1419 		WLAN_CIPHER_SUITE_TKIP,
1420 		WLAN_CIPHER_SUITE_CCMP,
1421 	};
1422 
1423 	ieee80211_hw_set(wcn->hw, TIMING_BEACON_ONLY);
1424 	ieee80211_hw_set(wcn->hw, AMPDU_AGGREGATION);
1425 	ieee80211_hw_set(wcn->hw, SUPPORTS_PS);
1426 	ieee80211_hw_set(wcn->hw, SIGNAL_DBM);
1427 	ieee80211_hw_set(wcn->hw, HAS_RATE_CONTROL);
1428 	ieee80211_hw_set(wcn->hw, SINGLE_SCAN_ON_ALL_BANDS);
1429 	ieee80211_hw_set(wcn->hw, REPORTS_TX_ACK_STATUS);
1430 
1431 	wcn->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1432 		BIT(NL80211_IFTYPE_AP) |
1433 		BIT(NL80211_IFTYPE_ADHOC) |
1434 		BIT(NL80211_IFTYPE_MESH_POINT);
1435 
1436 	wcn->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wcn_band_2ghz;
1437 	if (wcn->rf_id != RF_IRIS_WCN3620)
1438 		wcn->hw->wiphy->bands[NL80211_BAND_5GHZ] = &wcn_band_5ghz;
1439 
1440 	if (wcn->rf_id == RF_IRIS_WCN3680)
1441 		wcn36xx_set_ieee80211_vht_caps(&wcn_band_5ghz.vht_cap);
1442 
1443 	wcn->hw->wiphy->max_scan_ssids = WCN36XX_MAX_SCAN_SSIDS;
1444 	wcn->hw->wiphy->max_scan_ie_len = WCN36XX_MAX_SCAN_IE_LEN;
1445 
1446 	wcn->hw->wiphy->cipher_suites = cipher_suites;
1447 	wcn->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1448 
1449 #ifdef CONFIG_PM
1450 	wcn->hw->wiphy->wowlan = &wowlan_support;
1451 #endif
1452 
1453 	wcn->hw->max_listen_interval = 200;
1454 
1455 	wcn->hw->queues = 4;
1456 
1457 	SET_IEEE80211_DEV(wcn->hw, wcn->dev);
1458 
1459 	wcn->hw->sta_data_size = sizeof(struct wcn36xx_sta);
1460 	wcn->hw->vif_data_size = sizeof(struct wcn36xx_vif);
1461 
1462 	wiphy_ext_feature_set(wcn->hw->wiphy,
1463 			      NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1464 
1465 	return 0;
1466 }
1467 
1468 static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
1469 					  struct platform_device *pdev)
1470 {
1471 	struct device_node *mmio_node;
1472 	struct device_node *iris_node;
1473 	int index;
1474 	int ret;
1475 
1476 	/* Set TX IRQ */
1477 	ret = platform_get_irq_byname(pdev, "tx");
1478 	if (ret < 0)
1479 		return ret;
1480 	wcn->tx_irq = ret;
1481 
1482 	/* Set RX IRQ */
1483 	ret = platform_get_irq_byname(pdev, "rx");
1484 	if (ret < 0)
1485 		return ret;
1486 	wcn->rx_irq = ret;
1487 
1488 	/* Acquire SMSM tx enable handle */
1489 	wcn->tx_enable_state = qcom_smem_state_get(&pdev->dev,
1490 			"tx-enable", &wcn->tx_enable_state_bit);
1491 	if (IS_ERR(wcn->tx_enable_state)) {
1492 		wcn36xx_err("failed to get tx-enable state\n");
1493 		return PTR_ERR(wcn->tx_enable_state);
1494 	}
1495 
1496 	/* Acquire SMSM tx rings empty handle */
1497 	wcn->tx_rings_empty_state = qcom_smem_state_get(&pdev->dev,
1498 			"tx-rings-empty", &wcn->tx_rings_empty_state_bit);
1499 	if (IS_ERR(wcn->tx_rings_empty_state)) {
1500 		wcn36xx_err("failed to get tx-rings-empty state\n");
1501 		return PTR_ERR(wcn->tx_rings_empty_state);
1502 	}
1503 
1504 	mmio_node = of_parse_phandle(pdev->dev.parent->of_node, "qcom,mmio", 0);
1505 	if (!mmio_node) {
1506 		wcn36xx_err("failed to acquire qcom,mmio reference\n");
1507 		return -EINVAL;
1508 	}
1509 
1510 	wcn->is_pronto = !!of_device_is_compatible(mmio_node, "qcom,pronto");
1511 	wcn->is_pronto_v3 = !!of_device_is_compatible(mmio_node, "qcom,pronto-v3-pil");
1512 
1513 	/* Map the CCU memory */
1514 	index = of_property_match_string(mmio_node, "reg-names", "ccu");
1515 	wcn->ccu_base = of_iomap(mmio_node, index);
1516 	if (!wcn->ccu_base) {
1517 		wcn36xx_err("failed to map ccu memory\n");
1518 		ret = -ENOMEM;
1519 		goto put_mmio_node;
1520 	}
1521 
1522 	/* Map the DXE memory */
1523 	index = of_property_match_string(mmio_node, "reg-names", "dxe");
1524 	wcn->dxe_base = of_iomap(mmio_node, index);
1525 	if (!wcn->dxe_base) {
1526 		wcn36xx_err("failed to map dxe memory\n");
1527 		ret = -ENOMEM;
1528 		goto unmap_ccu;
1529 	}
1530 
1531 	/* External RF module */
1532 	iris_node = of_get_child_by_name(mmio_node, "iris");
1533 	if (iris_node) {
1534 		if (of_device_is_compatible(iris_node, "qcom,wcn3620"))
1535 			wcn->rf_id = RF_IRIS_WCN3620;
1536 		if (of_device_is_compatible(iris_node, "qcom,wcn3660") ||
1537 		    of_device_is_compatible(iris_node, "qcom,wcn3660b"))
1538 			wcn->rf_id = RF_IRIS_WCN3660;
1539 		if (of_device_is_compatible(iris_node, "qcom,wcn3680"))
1540 			wcn->rf_id = RF_IRIS_WCN3680;
1541 		of_node_put(iris_node);
1542 	}
1543 
1544 	of_node_put(mmio_node);
1545 	return 0;
1546 
1547 unmap_ccu:
1548 	iounmap(wcn->ccu_base);
1549 put_mmio_node:
1550 	of_node_put(mmio_node);
1551 	return ret;
1552 }
1553 
1554 static int wcn36xx_probe(struct platform_device *pdev)
1555 {
1556 	struct ieee80211_hw *hw;
1557 	struct wcn36xx *wcn;
1558 	void *wcnss;
1559 	int ret;
1560 	const u8 *addr;
1561 	int n_channels;
1562 
1563 	wcn36xx_dbg(WCN36XX_DBG_MAC, "platform probe\n");
1564 
1565 	wcnss = dev_get_drvdata(pdev->dev.parent);
1566 
1567 	hw = ieee80211_alloc_hw(sizeof(struct wcn36xx), &wcn36xx_ops);
1568 	if (!hw) {
1569 		wcn36xx_err("failed to alloc hw\n");
1570 		ret = -ENOMEM;
1571 		goto out_err;
1572 	}
1573 	platform_set_drvdata(pdev, hw);
1574 	wcn = hw->priv;
1575 	wcn->hw = hw;
1576 	wcn->dev = &pdev->dev;
1577 	wcn->first_boot = true;
1578 	mutex_init(&wcn->conf_mutex);
1579 	mutex_init(&wcn->hal_mutex);
1580 	mutex_init(&wcn->scan_lock);
1581 	__skb_queue_head_init(&wcn->amsdu);
1582 
1583 	wcn->hal_buf = devm_kmalloc(wcn->dev, WCN36XX_HAL_BUF_SIZE, GFP_KERNEL);
1584 	if (!wcn->hal_buf) {
1585 		ret = -ENOMEM;
1586 		goto out_wq;
1587 	}
1588 
1589 	n_channels = wcn_band_2ghz.n_channels + wcn_band_5ghz.n_channels;
1590 	wcn->chan_survey = devm_kmalloc(wcn->dev, n_channels, GFP_KERNEL);
1591 	if (!wcn->chan_survey) {
1592 		ret = -ENOMEM;
1593 		goto out_wq;
1594 	}
1595 
1596 	ret = dma_set_mask_and_coherent(wcn->dev, DMA_BIT_MASK(32));
1597 	if (ret < 0) {
1598 		wcn36xx_err("failed to set DMA mask: %d\n", ret);
1599 		goto out_wq;
1600 	}
1601 
1602 	wcn->nv_file = WLAN_NV_FILE;
1603 	ret = of_property_read_string(wcn->dev->parent->of_node, "firmware-name", &wcn->nv_file);
1604 	if (ret < 0 && ret != -EINVAL) {
1605 		wcn36xx_err("failed to read \"firmware-name\" property: %d\n", ret);
1606 		goto out_wq;
1607 	}
1608 
1609 	wcn->smd_channel = qcom_wcnss_open_channel(wcnss, "WLAN_CTRL", wcn36xx_smd_rsp_process, hw);
1610 	if (IS_ERR(wcn->smd_channel)) {
1611 		wcn36xx_err("failed to open WLAN_CTRL channel\n");
1612 		ret = PTR_ERR(wcn->smd_channel);
1613 		goto out_wq;
1614 	}
1615 
1616 	addr = of_get_property(pdev->dev.of_node, "local-mac-address", &ret);
1617 	if (addr && ret != ETH_ALEN) {
1618 		wcn36xx_err("invalid local-mac-address\n");
1619 		ret = -EINVAL;
1620 		goto out_destroy_ept;
1621 	} else if (addr) {
1622 		wcn36xx_info("mac address: %pM\n", addr);
1623 		SET_IEEE80211_PERM_ADDR(wcn->hw, addr);
1624 	}
1625 
1626 	ret = wcn36xx_platform_get_resources(wcn, pdev);
1627 	if (ret)
1628 		goto out_destroy_ept;
1629 
1630 	wcn36xx_init_ieee80211(wcn);
1631 	ret = ieee80211_register_hw(wcn->hw);
1632 	if (ret)
1633 		goto out_unmap;
1634 
1635 	return 0;
1636 
1637 out_unmap:
1638 	iounmap(wcn->ccu_base);
1639 	iounmap(wcn->dxe_base);
1640 out_destroy_ept:
1641 	rpmsg_destroy_ept(wcn->smd_channel);
1642 out_wq:
1643 	ieee80211_free_hw(hw);
1644 out_err:
1645 	return ret;
1646 }
1647 
1648 static int wcn36xx_remove(struct platform_device *pdev)
1649 {
1650 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
1651 	struct wcn36xx *wcn = hw->priv;
1652 	wcn36xx_dbg(WCN36XX_DBG_MAC, "platform remove\n");
1653 
1654 	release_firmware(wcn->nv);
1655 
1656 	ieee80211_unregister_hw(hw);
1657 
1658 	qcom_smem_state_put(wcn->tx_enable_state);
1659 	qcom_smem_state_put(wcn->tx_rings_empty_state);
1660 
1661 	rpmsg_destroy_ept(wcn->smd_channel);
1662 
1663 	iounmap(wcn->dxe_base);
1664 	iounmap(wcn->ccu_base);
1665 
1666 	__skb_queue_purge(&wcn->amsdu);
1667 
1668 	mutex_destroy(&wcn->hal_mutex);
1669 	ieee80211_free_hw(hw);
1670 
1671 	return 0;
1672 }
1673 
1674 static const struct of_device_id wcn36xx_of_match[] = {
1675 	{ .compatible = "qcom,wcnss-wlan" },
1676 	{}
1677 };
1678 MODULE_DEVICE_TABLE(of, wcn36xx_of_match);
1679 
1680 static struct platform_driver wcn36xx_driver = {
1681 	.probe      = wcn36xx_probe,
1682 	.remove     = wcn36xx_remove,
1683 	.driver         = {
1684 		.name   = "wcn36xx",
1685 		.of_match_table = wcn36xx_of_match,
1686 	},
1687 };
1688 
1689 module_platform_driver(wcn36xx_driver);
1690 
1691 MODULE_LICENSE("Dual BSD/GPL");
1692 MODULE_AUTHOR("Eugene Krasnikov k.eugene.e@gmail.com");
1693 MODULE_FIRMWARE(WLAN_NV_FILE);
1694