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 "wcn36xx.h"
29 #include "testmode.h"
30 
31 unsigned int wcn36xx_dbg_mask;
32 module_param_named(debug_mask, wcn36xx_dbg_mask, uint, 0644);
33 MODULE_PARM_DESC(debug_mask, "Debugging mask");
34 
35 #define CHAN2G(_freq, _idx) { \
36 	.band = NL80211_BAND_2GHZ, \
37 	.center_freq = (_freq), \
38 	.hw_value = (_idx), \
39 	.max_power = 25, \
40 }
41 
42 #define CHAN5G(_freq, _idx, _phy_val) { \
43 	.band = NL80211_BAND_5GHZ, \
44 	.center_freq = (_freq), \
45 	.hw_value = (_phy_val) << HW_VALUE_PHY_SHIFT | HW_VALUE_CHANNEL(_idx), \
46 	.max_power = 25, \
47 }
48 
49 /* The wcn firmware expects channel values to matching
50  * their mnemonic values. So use these for .hw_value. */
51 static struct ieee80211_channel wcn_2ghz_channels[] = {
52 	CHAN2G(2412, 1), /* Channel 1 */
53 	CHAN2G(2417, 2), /* Channel 2 */
54 	CHAN2G(2422, 3), /* Channel 3 */
55 	CHAN2G(2427, 4), /* Channel 4 */
56 	CHAN2G(2432, 5), /* Channel 5 */
57 	CHAN2G(2437, 6), /* Channel 6 */
58 	CHAN2G(2442, 7), /* Channel 7 */
59 	CHAN2G(2447, 8), /* Channel 8 */
60 	CHAN2G(2452, 9), /* Channel 9 */
61 	CHAN2G(2457, 10), /* Channel 10 */
62 	CHAN2G(2462, 11), /* Channel 11 */
63 	CHAN2G(2467, 12), /* Channel 12 */
64 	CHAN2G(2472, 13), /* Channel 13 */
65 	CHAN2G(2484, 14)  /* Channel 14 */
66 
67 };
68 
69 static struct ieee80211_channel wcn_5ghz_channels[] = {
70 	CHAN5G(5180, 36, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
71 	CHAN5G(5200, 40, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
72 	CHAN5G(5220, 44, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
73 	CHAN5G(5240, 48, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
74 	CHAN5G(5260, 52, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
75 	CHAN5G(5280, 56, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
76 	CHAN5G(5300, 60, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
77 	CHAN5G(5320, 64, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
78 	CHAN5G(5500, 100, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
79 	CHAN5G(5520, 104, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
80 	CHAN5G(5540, 108, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
81 	CHAN5G(5560, 112, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
82 	CHAN5G(5580, 116, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
83 	CHAN5G(5600, 120, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
84 	CHAN5G(5620, 124, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
85 	CHAN5G(5640, 128, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
86 	CHAN5G(5660, 132, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
87 	CHAN5G(5700, 140, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
88 	CHAN5G(5745, 149, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
89 	CHAN5G(5765, 153, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
90 	CHAN5G(5785, 157, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
91 	CHAN5G(5805, 161, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
92 	CHAN5G(5825, 165, 0)
93 };
94 
95 #define RATE(_bitrate, _hw_rate, _flags) { \
96 	.bitrate        = (_bitrate),                   \
97 	.flags          = (_flags),                     \
98 	.hw_value       = (_hw_rate),                   \
99 	.hw_value_short = (_hw_rate)  \
100 }
101 
102 static struct ieee80211_rate wcn_2ghz_rates[] = {
103 	RATE(10, HW_RATE_INDEX_1MBPS, 0),
104 	RATE(20, HW_RATE_INDEX_2MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
105 	RATE(55, HW_RATE_INDEX_5_5MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
106 	RATE(110, HW_RATE_INDEX_11MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
107 	RATE(60, HW_RATE_INDEX_6MBPS, 0),
108 	RATE(90, HW_RATE_INDEX_9MBPS, 0),
109 	RATE(120, HW_RATE_INDEX_12MBPS, 0),
110 	RATE(180, HW_RATE_INDEX_18MBPS, 0),
111 	RATE(240, HW_RATE_INDEX_24MBPS, 0),
112 	RATE(360, HW_RATE_INDEX_36MBPS, 0),
113 	RATE(480, HW_RATE_INDEX_48MBPS, 0),
114 	RATE(540, HW_RATE_INDEX_54MBPS, 0)
115 };
116 
117 static struct ieee80211_rate wcn_5ghz_rates[] = {
118 	RATE(60, HW_RATE_INDEX_6MBPS, 0),
119 	RATE(90, HW_RATE_INDEX_9MBPS, 0),
120 	RATE(120, HW_RATE_INDEX_12MBPS, 0),
121 	RATE(180, HW_RATE_INDEX_18MBPS, 0),
122 	RATE(240, HW_RATE_INDEX_24MBPS, 0),
123 	RATE(360, HW_RATE_INDEX_36MBPS, 0),
124 	RATE(480, HW_RATE_INDEX_48MBPS, 0),
125 	RATE(540, HW_RATE_INDEX_54MBPS, 0)
126 };
127 
128 static struct ieee80211_supported_band wcn_band_2ghz = {
129 	.channels	= wcn_2ghz_channels,
130 	.n_channels	= ARRAY_SIZE(wcn_2ghz_channels),
131 	.bitrates	= wcn_2ghz_rates,
132 	.n_bitrates	= ARRAY_SIZE(wcn_2ghz_rates),
133 	.ht_cap		= {
134 		.cap =	IEEE80211_HT_CAP_GRN_FLD |
135 			IEEE80211_HT_CAP_SGI_20 |
136 			IEEE80211_HT_CAP_DSSSCCK40 |
137 			IEEE80211_HT_CAP_LSIG_TXOP_PROT,
138 		.ht_supported = true,
139 		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
140 		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
141 		.mcs = {
142 			.rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
143 			.rx_highest = cpu_to_le16(72),
144 			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
145 		}
146 	}
147 };
148 
149 static struct ieee80211_supported_band wcn_band_5ghz = {
150 	.channels	= wcn_5ghz_channels,
151 	.n_channels	= ARRAY_SIZE(wcn_5ghz_channels),
152 	.bitrates	= wcn_5ghz_rates,
153 	.n_bitrates	= ARRAY_SIZE(wcn_5ghz_rates),
154 	.ht_cap		= {
155 		.cap =	IEEE80211_HT_CAP_GRN_FLD |
156 			IEEE80211_HT_CAP_SGI_20 |
157 			IEEE80211_HT_CAP_DSSSCCK40 |
158 			IEEE80211_HT_CAP_LSIG_TXOP_PROT |
159 			IEEE80211_HT_CAP_SGI_40 |
160 			IEEE80211_HT_CAP_SUP_WIDTH_20_40,
161 		.ht_supported = true,
162 		.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
163 		.ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
164 		.mcs = {
165 			.rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
166 			.rx_highest = cpu_to_le16(150),
167 			.tx_params = IEEE80211_HT_MCS_TX_DEFINED,
168 		}
169 	}
170 };
171 
172 #ifdef CONFIG_PM
173 
174 static const struct wiphy_wowlan_support wowlan_support = {
175 	.flags = WIPHY_WOWLAN_ANY
176 };
177 
178 #endif
179 
180 static inline u8 get_sta_index(struct ieee80211_vif *vif,
181 			       struct wcn36xx_sta *sta_priv)
182 {
183 	return NL80211_IFTYPE_STATION == vif->type ?
184 	       sta_priv->bss_sta_index :
185 	       sta_priv->sta_index;
186 }
187 
188 static const char * const wcn36xx_caps_names[] = {
189 	"MCC",				/* 0 */
190 	"P2P",				/* 1 */
191 	"DOT11AC",			/* 2 */
192 	"SLM_SESSIONIZATION",		/* 3 */
193 	"DOT11AC_OPMODE",		/* 4 */
194 	"SAP32STA",			/* 5 */
195 	"TDLS",				/* 6 */
196 	"P2P_GO_NOA_DECOUPLE_INIT_SCAN",/* 7 */
197 	"WLANACTIVE_OFFLOAD",		/* 8 */
198 	"BEACON_OFFLOAD",		/* 9 */
199 	"SCAN_OFFLOAD",			/* 10 */
200 	"ROAM_OFFLOAD",			/* 11 */
201 	"BCN_MISS_OFFLOAD",		/* 12 */
202 	"STA_POWERSAVE",		/* 13 */
203 	"STA_ADVANCED_PWRSAVE",		/* 14 */
204 	"AP_UAPSD",			/* 15 */
205 	"AP_DFS",			/* 16 */
206 	"BLOCKACK",			/* 17 */
207 	"PHY_ERR",			/* 18 */
208 	"BCN_FILTER",			/* 19 */
209 	"RTT",				/* 20 */
210 	"RATECTRL",			/* 21 */
211 	"WOW",				/* 22 */
212 	"WLAN_ROAM_SCAN_OFFLOAD",	/* 23 */
213 	"SPECULATIVE_PS_POLL",		/* 24 */
214 	"SCAN_SCH",			/* 25 */
215 	"IBSS_HEARTBEAT_OFFLOAD",	/* 26 */
216 	"WLAN_SCAN_OFFLOAD",		/* 27 */
217 	"WLAN_PERIODIC_TX_PTRN",	/* 28 */
218 	"ADVANCE_TDLS",			/* 29 */
219 	"BATCH_SCAN",			/* 30 */
220 	"FW_IN_TX_PATH",		/* 31 */
221 	"EXTENDED_NSOFFLOAD_SLOT",	/* 32 */
222 	"CH_SWITCH_V1",			/* 33 */
223 	"HT40_OBSS_SCAN",		/* 34 */
224 	"UPDATE_CHANNEL_LIST",		/* 35 */
225 	"WLAN_MCADDR_FLT",		/* 36 */
226 	"WLAN_CH144",			/* 37 */
227 	"NAN",				/* 38 */
228 	"TDLS_SCAN_COEXISTENCE",	/* 39 */
229 	"LINK_LAYER_STATS_MEAS",	/* 40 */
230 	"MU_MIMO",			/* 41 */
231 	"EXTENDED_SCAN",		/* 42 */
232 	"DYNAMIC_WMM_PS",		/* 43 */
233 	"MAC_SPOOFED_SCAN",		/* 44 */
234 	"BMU_ERROR_GENERIC_RECOVERY",	/* 45 */
235 	"DISA",				/* 46 */
236 	"FW_STATS",			/* 47 */
237 	"WPS_PRBRSP_TMPL",		/* 48 */
238 	"BCN_IE_FLT_DELTA",		/* 49 */
239 	"TDLS_OFF_CHANNEL",		/* 51 */
240 	"RTT3",				/* 52 */
241 	"MGMT_FRAME_LOGGING",		/* 53 */
242 	"ENHANCED_TXBD_COMPLETION",	/* 54 */
243 	"LOGGING_ENHANCEMENT",		/* 55 */
244 	"EXT_SCAN_ENHANCED",		/* 56 */
245 	"MEMORY_DUMP_SUPPORTED",	/* 57 */
246 	"PER_PKT_STATS_SUPPORTED",	/* 58 */
247 	"EXT_LL_STAT",			/* 60 */
248 	"WIFI_CONFIG",			/* 61 */
249 	"ANTENNA_DIVERSITY_SELECTION",	/* 62 */
250 };
251 
252 static const char *wcn36xx_get_cap_name(enum place_holder_in_cap_bitmap x)
253 {
254 	if (x >= ARRAY_SIZE(wcn36xx_caps_names))
255 		return "UNKNOWN";
256 	return wcn36xx_caps_names[x];
257 }
258 
259 static void wcn36xx_feat_caps_info(struct wcn36xx *wcn)
260 {
261 	int i;
262 
263 	for (i = 0; i < MAX_FEATURE_SUPPORTED; i++) {
264 		if (get_feat_caps(wcn->fw_feat_caps, i))
265 			wcn36xx_dbg(WCN36XX_DBG_MAC, "FW Cap %s\n", wcn36xx_get_cap_name(i));
266 	}
267 }
268 
269 static int wcn36xx_start(struct ieee80211_hw *hw)
270 {
271 	struct wcn36xx *wcn = hw->priv;
272 	int ret;
273 
274 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac start\n");
275 
276 	/* SMD initialization */
277 	ret = wcn36xx_smd_open(wcn);
278 	if (ret) {
279 		wcn36xx_err("Failed to open smd channel: %d\n", ret);
280 		goto out_err;
281 	}
282 
283 	/* Allocate memory pools for Mgmt BD headers and Data BD headers */
284 	ret = wcn36xx_dxe_allocate_mem_pools(wcn);
285 	if (ret) {
286 		wcn36xx_err("Failed to alloc DXE mempool: %d\n", ret);
287 		goto out_smd_close;
288 	}
289 
290 	ret = wcn36xx_dxe_alloc_ctl_blks(wcn);
291 	if (ret) {
292 		wcn36xx_err("Failed to alloc DXE ctl blocks: %d\n", ret);
293 		goto out_free_dxe_pool;
294 	}
295 
296 	wcn->hal_buf = kmalloc(WCN36XX_HAL_BUF_SIZE, GFP_KERNEL);
297 	if (!wcn->hal_buf) {
298 		wcn36xx_err("Failed to allocate smd buf\n");
299 		ret = -ENOMEM;
300 		goto out_free_dxe_ctl;
301 	}
302 
303 	ret = wcn36xx_smd_load_nv(wcn);
304 	if (ret) {
305 		wcn36xx_err("Failed to push NV to chip\n");
306 		goto out_free_smd_buf;
307 	}
308 
309 	ret = wcn36xx_smd_start(wcn);
310 	if (ret) {
311 		wcn36xx_err("Failed to start chip\n");
312 		goto out_free_smd_buf;
313 	}
314 
315 	if (!wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
316 		ret = wcn36xx_smd_feature_caps_exchange(wcn);
317 		if (ret)
318 			wcn36xx_warn("Exchange feature caps failed\n");
319 		else
320 			wcn36xx_feat_caps_info(wcn);
321 	}
322 
323 	/* DMA channel initialization */
324 	ret = wcn36xx_dxe_init(wcn);
325 	if (ret) {
326 		wcn36xx_err("DXE init failed\n");
327 		goto out_smd_stop;
328 	}
329 
330 	wcn36xx_debugfs_init(wcn);
331 
332 	INIT_LIST_HEAD(&wcn->vif_list);
333 	spin_lock_init(&wcn->dxe_lock);
334 
335 	return 0;
336 
337 out_smd_stop:
338 	wcn36xx_smd_stop(wcn);
339 out_free_smd_buf:
340 	kfree(wcn->hal_buf);
341 out_free_dxe_ctl:
342 	wcn36xx_dxe_free_ctl_blks(wcn);
343 out_free_dxe_pool:
344 	wcn36xx_dxe_free_mem_pools(wcn);
345 out_smd_close:
346 	wcn36xx_smd_close(wcn);
347 out_err:
348 	return ret;
349 }
350 
351 static void wcn36xx_stop(struct ieee80211_hw *hw)
352 {
353 	struct wcn36xx *wcn = hw->priv;
354 
355 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac stop\n");
356 
357 	mutex_lock(&wcn->scan_lock);
358 	if (wcn->scan_req) {
359 		struct cfg80211_scan_info scan_info = {
360 			.aborted = true,
361 		};
362 
363 		ieee80211_scan_completed(wcn->hw, &scan_info);
364 	}
365 	wcn->scan_req = NULL;
366 	mutex_unlock(&wcn->scan_lock);
367 
368 	wcn36xx_debugfs_exit(wcn);
369 	wcn36xx_smd_stop(wcn);
370 	wcn36xx_dxe_deinit(wcn);
371 	wcn36xx_smd_close(wcn);
372 
373 	wcn36xx_dxe_free_mem_pools(wcn);
374 	wcn36xx_dxe_free_ctl_blks(wcn);
375 
376 	kfree(wcn->hal_buf);
377 }
378 
379 static void wcn36xx_change_ps(struct wcn36xx *wcn, bool enable)
380 {
381 	struct ieee80211_vif *vif = NULL;
382 	struct wcn36xx_vif *tmp;
383 
384 	list_for_each_entry(tmp, &wcn->vif_list, list) {
385 		vif = wcn36xx_priv_to_vif(tmp);
386 		if (enable && !wcn->sw_scan) {
387 			if (vif->bss_conf.ps) /* ps allowed ? */
388 				wcn36xx_pmc_enter_bmps_state(wcn, vif);
389 		} else {
390 			wcn36xx_pmc_exit_bmps_state(wcn, vif);
391 		}
392 	}
393 }
394 
395 static void wcn36xx_change_opchannel(struct wcn36xx *wcn, int ch)
396 {
397 	struct ieee80211_vif *vif = NULL;
398 	struct wcn36xx_vif *tmp;
399 
400 	list_for_each_entry(tmp, &wcn->vif_list, list) {
401 		vif = wcn36xx_priv_to_vif(tmp);
402 		wcn36xx_smd_switch_channel(wcn, vif, ch);
403 	}
404 }
405 
406 static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
407 {
408 	struct wcn36xx *wcn = hw->priv;
409 
410 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac config changed 0x%08x\n", changed);
411 
412 	mutex_lock(&wcn->conf_mutex);
413 
414 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
415 		int ch = WCN36XX_HW_CHANNEL(wcn);
416 		wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n",
417 			    ch);
418 
419 		if (wcn->sw_scan_opchannel == ch) {
420 			/* If channel is the initial operating channel, we may
421 			 * want to receive/transmit regular data packets, then
422 			 * simply stop the scan session and exit PS mode.
423 			 */
424 			wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN,
425 						wcn->sw_scan_vif);
426 		} else if (wcn->sw_scan) {
427 			/* A scan is ongoing, do not change the operating
428 			 * channel, but start a scan session on the channel.
429 			 */
430 			wcn36xx_smd_init_scan(wcn, HAL_SYS_MODE_SCAN,
431 					      wcn->sw_scan_vif);
432 			wcn36xx_smd_start_scan(wcn, ch);
433 		} else {
434 			wcn36xx_change_opchannel(wcn, ch);
435 		}
436 	}
437 
438 	if (changed & IEEE80211_CONF_CHANGE_PS)
439 		wcn36xx_change_ps(wcn, hw->conf.flags & IEEE80211_CONF_PS);
440 
441 	mutex_unlock(&wcn->conf_mutex);
442 
443 	return 0;
444 }
445 
446 static void wcn36xx_configure_filter(struct ieee80211_hw *hw,
447 				     unsigned int changed,
448 				     unsigned int *total, u64 multicast)
449 {
450 	struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
451 	struct wcn36xx *wcn = hw->priv;
452 	struct wcn36xx_vif *tmp;
453 	struct ieee80211_vif *vif = NULL;
454 
455 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac configure filter\n");
456 
457 	mutex_lock(&wcn->conf_mutex);
458 
459 	*total &= FIF_ALLMULTI;
460 
461 	fp = (void *)(unsigned long)multicast;
462 	list_for_each_entry(tmp, &wcn->vif_list, list) {
463 		vif = wcn36xx_priv_to_vif(tmp);
464 
465 		/* FW handles MC filtering only when connected as STA */
466 		if (*total & FIF_ALLMULTI)
467 			wcn36xx_smd_set_mc_list(wcn, vif, NULL);
468 		else if (NL80211_IFTYPE_STATION == vif->type && tmp->sta_assoc)
469 			wcn36xx_smd_set_mc_list(wcn, vif, fp);
470 	}
471 
472 	mutex_unlock(&wcn->conf_mutex);
473 	kfree(fp);
474 }
475 
476 static u64 wcn36xx_prepare_multicast(struct ieee80211_hw *hw,
477 				     struct netdev_hw_addr_list *mc_list)
478 {
479 	struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
480 	struct netdev_hw_addr *ha;
481 
482 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac prepare multicast list\n");
483 	fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
484 	if (!fp) {
485 		wcn36xx_err("Out of memory setting filters.\n");
486 		return 0;
487 	}
488 
489 	fp->mc_addr_count = 0;
490 	/* update multicast filtering parameters */
491 	if (netdev_hw_addr_list_count(mc_list) <=
492 	    WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS) {
493 		netdev_hw_addr_list_for_each(ha, mc_list) {
494 			memcpy(fp->mc_addr[fp->mc_addr_count],
495 					ha->addr, ETH_ALEN);
496 			fp->mc_addr_count++;
497 		}
498 	}
499 
500 	return (u64)(unsigned long)fp;
501 }
502 
503 static void wcn36xx_tx(struct ieee80211_hw *hw,
504 		       struct ieee80211_tx_control *control,
505 		       struct sk_buff *skb)
506 {
507 	struct wcn36xx *wcn = hw->priv;
508 	struct wcn36xx_sta *sta_priv = NULL;
509 
510 	if (control->sta)
511 		sta_priv = wcn36xx_sta_to_priv(control->sta);
512 
513 	if (wcn36xx_start_tx(wcn, sta_priv, skb))
514 		ieee80211_free_txskb(wcn->hw, skb);
515 }
516 
517 static int wcn36xx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
518 			   struct ieee80211_vif *vif,
519 			   struct ieee80211_sta *sta,
520 			   struct ieee80211_key_conf *key_conf)
521 {
522 	struct wcn36xx *wcn = hw->priv;
523 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
524 	struct wcn36xx_sta *sta_priv = sta ? wcn36xx_sta_to_priv(sta) : NULL;
525 	int ret = 0;
526 	u8 key[WLAN_MAX_KEY_LEN];
527 
528 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac80211 set key\n");
529 	wcn36xx_dbg(WCN36XX_DBG_MAC, "Key: cmd=0x%x algo:0x%x, id:%d, len:%d flags 0x%x\n",
530 		    cmd, key_conf->cipher, key_conf->keyidx,
531 		    key_conf->keylen, key_conf->flags);
532 	wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "KEY: ",
533 			 key_conf->key,
534 			 key_conf->keylen);
535 
536 	mutex_lock(&wcn->conf_mutex);
537 
538 	switch (key_conf->cipher) {
539 	case WLAN_CIPHER_SUITE_WEP40:
540 		vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP40;
541 		break;
542 	case WLAN_CIPHER_SUITE_WEP104:
543 		vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP104;
544 		break;
545 	case WLAN_CIPHER_SUITE_CCMP:
546 		vif_priv->encrypt_type = WCN36XX_HAL_ED_CCMP;
547 		break;
548 	case WLAN_CIPHER_SUITE_TKIP:
549 		vif_priv->encrypt_type = WCN36XX_HAL_ED_TKIP;
550 		break;
551 	default:
552 		wcn36xx_err("Unsupported key type 0x%x\n",
553 			      key_conf->cipher);
554 		ret = -EOPNOTSUPP;
555 		goto out;
556 	}
557 
558 	switch (cmd) {
559 	case SET_KEY:
560 		if (WCN36XX_HAL_ED_TKIP == vif_priv->encrypt_type) {
561 			/*
562 			 * Supplicant is sending key in the wrong order:
563 			 * Temporal Key (16 b) - TX MIC (8 b) - RX MIC (8 b)
564 			 * but HW expects it to be in the order as described in
565 			 * IEEE 802.11 spec (see chapter 11.7) like this:
566 			 * Temporal Key (16 b) - RX MIC (8 b) - TX MIC (8 b)
567 			 */
568 			memcpy(key, key_conf->key, 16);
569 			memcpy(key + 16, key_conf->key + 24, 8);
570 			memcpy(key + 24, key_conf->key + 16, 8);
571 		} else {
572 			memcpy(key, key_conf->key, key_conf->keylen);
573 		}
574 
575 		if (IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags) {
576 			sta_priv->is_data_encrypted = true;
577 			/* Reconfigure bss with encrypt_type */
578 			if (NL80211_IFTYPE_STATION == vif->type)
579 				wcn36xx_smd_config_bss(wcn,
580 						       vif,
581 						       sta,
582 						       sta->addr,
583 						       true);
584 
585 			wcn36xx_smd_set_stakey(wcn,
586 				vif_priv->encrypt_type,
587 				key_conf->keyidx,
588 				key_conf->keylen,
589 				key,
590 				get_sta_index(vif, sta_priv));
591 		} else {
592 			wcn36xx_smd_set_bsskey(wcn,
593 				vif_priv->encrypt_type,
594 				vif_priv->bss_index,
595 				key_conf->keyidx,
596 				key_conf->keylen,
597 				key);
598 
599 			if ((WLAN_CIPHER_SUITE_WEP40 == key_conf->cipher) ||
600 			    (WLAN_CIPHER_SUITE_WEP104 == key_conf->cipher)) {
601 				list_for_each_entry(sta_priv,
602 						    &vif_priv->sta_list, list) {
603 					sta_priv->is_data_encrypted = true;
604 					wcn36xx_smd_set_stakey(wcn,
605 						vif_priv->encrypt_type,
606 						key_conf->keyidx,
607 						key_conf->keylen,
608 						key,
609 						get_sta_index(vif, sta_priv));
610 				}
611 			}
612 		}
613 		/* FIXME: Only enable bmps support when encryption is enabled.
614 		 * For any reasons, when connected to open/no-security BSS,
615 		 * the wcn36xx controller in bmps mode does not forward
616 		 * 'wake-up' beacons despite AP sends DTIM with station AID.
617 		 * It could be due to a firmware issue or to the way driver
618 		 * configure the station.
619 		 */
620 		if (vif->type == NL80211_IFTYPE_STATION)
621 			vif_priv->allow_bmps = true;
622 		break;
623 	case DISABLE_KEY:
624 		if (!(IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags)) {
625 			if (vif_priv->bss_index != WCN36XX_HAL_BSS_INVALID_IDX)
626 				wcn36xx_smd_remove_bsskey(wcn,
627 					vif_priv->encrypt_type,
628 					vif_priv->bss_index,
629 					key_conf->keyidx);
630 
631 			vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
632 		} else {
633 			sta_priv->is_data_encrypted = false;
634 			/* do not remove key if disassociated */
635 			if (sta_priv->aid)
636 				wcn36xx_smd_remove_stakey(wcn,
637 					vif_priv->encrypt_type,
638 					key_conf->keyidx,
639 					get_sta_index(vif, sta_priv));
640 		}
641 		break;
642 	default:
643 		wcn36xx_err("Unsupported key cmd 0x%x\n", cmd);
644 		ret = -EOPNOTSUPP;
645 		goto out;
646 	}
647 
648 out:
649 	mutex_unlock(&wcn->conf_mutex);
650 
651 	return ret;
652 }
653 
654 static int wcn36xx_hw_scan(struct ieee80211_hw *hw,
655 			   struct ieee80211_vif *vif,
656 			   struct ieee80211_scan_request *hw_req)
657 {
658 	struct wcn36xx *wcn = hw->priv;
659 	int i;
660 
661 	if (!get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
662 		/* fallback to mac80211 software scan */
663 		return 1;
664 	}
665 
666 	/* For unknown reason, the hardware offloaded scan only works with
667 	 * 2.4Ghz channels, fallback to software scan in other cases.
668 	 */
669 	for (i = 0; i < hw_req->req.n_channels; i++) {
670 		if (hw_req->req.channels[i]->band != NL80211_BAND_2GHZ)
671 			return 1;
672 	}
673 
674 	mutex_lock(&wcn->scan_lock);
675 	if (wcn->scan_req) {
676 		mutex_unlock(&wcn->scan_lock);
677 		return -EBUSY;
678 	}
679 
680 	wcn->scan_aborted = false;
681 	wcn->scan_req = &hw_req->req;
682 
683 	mutex_unlock(&wcn->scan_lock);
684 
685 	return wcn36xx_smd_start_hw_scan(wcn, vif, &hw_req->req);
686 }
687 
688 static void wcn36xx_cancel_hw_scan(struct ieee80211_hw *hw,
689 				   struct ieee80211_vif *vif)
690 {
691 	struct wcn36xx *wcn = hw->priv;
692 
693 	mutex_lock(&wcn->scan_lock);
694 	wcn->scan_aborted = true;
695 	mutex_unlock(&wcn->scan_lock);
696 
697 	if (get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
698 		/* ieee80211_scan_completed will be called on FW scan
699 		 * indication */
700 		wcn36xx_smd_stop_hw_scan(wcn);
701 	}
702 }
703 
704 static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw,
705 				  struct ieee80211_vif *vif,
706 				  const u8 *mac_addr)
707 {
708 	struct wcn36xx *wcn = hw->priv;
709 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
710 
711 	wcn->sw_scan = true;
712 	wcn->sw_scan_vif = vif;
713 	if (vif_priv->sta_assoc)
714 		wcn->sw_scan_opchannel = WCN36XX_HW_CHANNEL(wcn);
715 	else
716 		wcn->sw_scan_opchannel = 0;
717 }
718 
719 static void wcn36xx_sw_scan_complete(struct ieee80211_hw *hw,
720 				     struct ieee80211_vif *vif)
721 {
722 	struct wcn36xx *wcn = hw->priv;
723 
724 	/* ensure that any scan session is finished */
725 	wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN, wcn->sw_scan_vif);
726 	wcn->sw_scan = false;
727 	wcn->sw_scan_opchannel = 0;
728 }
729 
730 static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta,
731 					 enum nl80211_band band)
732 {
733 	int i, size;
734 	u16 *rates_table;
735 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
736 	u32 rates = sta->supp_rates[band];
737 
738 	memset(&sta_priv->supported_rates, 0,
739 		sizeof(sta_priv->supported_rates));
740 	sta_priv->supported_rates.op_rate_mode = STA_11n;
741 
742 	size = ARRAY_SIZE(sta_priv->supported_rates.dsss_rates);
743 	rates_table = sta_priv->supported_rates.dsss_rates;
744 	if (band == NL80211_BAND_2GHZ) {
745 		for (i = 0; i < size; i++) {
746 			if (rates & 0x01) {
747 				rates_table[i] = wcn_2ghz_rates[i].hw_value;
748 				rates = rates >> 1;
749 			}
750 		}
751 	}
752 
753 	size = ARRAY_SIZE(sta_priv->supported_rates.ofdm_rates);
754 	rates_table = sta_priv->supported_rates.ofdm_rates;
755 	for (i = 0; i < size; i++) {
756 		if (rates & 0x01) {
757 			rates_table[i] = wcn_5ghz_rates[i].hw_value;
758 			rates = rates >> 1;
759 		}
760 	}
761 
762 	if (sta->ht_cap.ht_supported) {
763 		BUILD_BUG_ON(sizeof(sta->ht_cap.mcs.rx_mask) >
764 			sizeof(sta_priv->supported_rates.supported_mcs_set));
765 		memcpy(sta_priv->supported_rates.supported_mcs_set,
766 		       sta->ht_cap.mcs.rx_mask,
767 		       sizeof(sta->ht_cap.mcs.rx_mask));
768 	}
769 
770 	if (sta->vht_cap.vht_supported) {
771 		sta_priv->supported_rates.op_rate_mode = STA_11ac;
772 		sta_priv->supported_rates.vht_rx_mcs_map =
773 				sta->vht_cap.vht_mcs.rx_mcs_map;
774 		sta_priv->supported_rates.vht_tx_mcs_map =
775 				sta->vht_cap.vht_mcs.tx_mcs_map;
776 	}
777 }
778 
779 void wcn36xx_set_default_rates(struct wcn36xx_hal_supported_rates *rates)
780 {
781 	u16 ofdm_rates[WCN36XX_HAL_NUM_OFDM_RATES] = {
782 		HW_RATE_INDEX_6MBPS,
783 		HW_RATE_INDEX_9MBPS,
784 		HW_RATE_INDEX_12MBPS,
785 		HW_RATE_INDEX_18MBPS,
786 		HW_RATE_INDEX_24MBPS,
787 		HW_RATE_INDEX_36MBPS,
788 		HW_RATE_INDEX_48MBPS,
789 		HW_RATE_INDEX_54MBPS
790 	};
791 	u16 dsss_rates[WCN36XX_HAL_NUM_DSSS_RATES] = {
792 		HW_RATE_INDEX_1MBPS,
793 		HW_RATE_INDEX_2MBPS,
794 		HW_RATE_INDEX_5_5MBPS,
795 		HW_RATE_INDEX_11MBPS
796 	};
797 
798 	rates->op_rate_mode = STA_11n;
799 	memcpy(rates->dsss_rates, dsss_rates,
800 		sizeof(*dsss_rates) * WCN36XX_HAL_NUM_DSSS_RATES);
801 	memcpy(rates->ofdm_rates, ofdm_rates,
802 		sizeof(*ofdm_rates) * WCN36XX_HAL_NUM_OFDM_RATES);
803 	rates->supported_mcs_set[0] = 0xFF;
804 }
805 
806 void wcn36xx_set_default_rates_v1(struct wcn36xx_hal_supported_rates_v1 *rates)
807 {
808 	rates->op_rate_mode = STA_11ac;
809 	rates->vht_rx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
810 	rates->vht_tx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
811 }
812 
813 static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw,
814 				     struct ieee80211_vif *vif,
815 				     struct ieee80211_bss_conf *bss_conf,
816 				     u32 changed)
817 {
818 	struct wcn36xx *wcn = hw->priv;
819 	struct sk_buff *skb = NULL;
820 	u16 tim_off, tim_len;
821 	enum wcn36xx_hal_link_state link_state;
822 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
823 
824 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss info changed vif %p changed 0x%08x\n",
825 		    vif, changed);
826 
827 	mutex_lock(&wcn->conf_mutex);
828 
829 	if (changed & BSS_CHANGED_BEACON_INFO) {
830 		wcn36xx_dbg(WCN36XX_DBG_MAC,
831 			    "mac bss changed dtim period %d\n",
832 			    bss_conf->dtim_period);
833 
834 		vif_priv->dtim_period = bss_conf->dtim_period;
835 	}
836 
837 	if (changed & BSS_CHANGED_BSSID) {
838 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed_bssid %pM\n",
839 			    bss_conf->bssid);
840 
841 		if (!is_zero_ether_addr(bss_conf->bssid)) {
842 			vif_priv->is_joining = true;
843 			vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
844 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
845 						WCN36XX_HAL_LINK_PREASSOC_STATE);
846 			wcn36xx_smd_join(wcn, bss_conf->bssid,
847 					 vif->addr, WCN36XX_HW_CHANNEL(wcn));
848 			wcn36xx_smd_config_bss(wcn, vif, NULL,
849 					       bss_conf->bssid, false);
850 		} else {
851 			vif_priv->is_joining = false;
852 			wcn36xx_smd_delete_bss(wcn, vif);
853 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
854 						WCN36XX_HAL_LINK_IDLE_STATE);
855 			vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
856 		}
857 	}
858 
859 	if (changed & BSS_CHANGED_SSID) {
860 		wcn36xx_dbg(WCN36XX_DBG_MAC,
861 			    "mac bss changed ssid\n");
862 		wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "ssid ",
863 				 bss_conf->ssid, bss_conf->ssid_len);
864 
865 		vif_priv->ssid.length = bss_conf->ssid_len;
866 		memcpy(&vif_priv->ssid.ssid,
867 		       bss_conf->ssid,
868 		       bss_conf->ssid_len);
869 	}
870 
871 	if (changed & BSS_CHANGED_ASSOC) {
872 		vif_priv->is_joining = false;
873 		if (bss_conf->assoc) {
874 			struct ieee80211_sta *sta;
875 			struct wcn36xx_sta *sta_priv;
876 
877 			wcn36xx_dbg(WCN36XX_DBG_MAC,
878 				    "mac assoc bss %pM vif %pM AID=%d\n",
879 				     bss_conf->bssid,
880 				     vif->addr,
881 				     bss_conf->aid);
882 
883 			vif_priv->sta_assoc = true;
884 
885 			/*
886 			 * Holding conf_mutex ensures mutal exclusion with
887 			 * wcn36xx_sta_remove() and as such ensures that sta
888 			 * won't be freed while we're operating on it. As such
889 			 * we do not need to hold the rcu_read_lock().
890 			 */
891 			sta = ieee80211_find_sta(vif, bss_conf->bssid);
892 			if (!sta) {
893 				wcn36xx_err("sta %pM is not found\n",
894 					      bss_conf->bssid);
895 				goto out;
896 			}
897 			sta_priv = wcn36xx_sta_to_priv(sta);
898 
899 			wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
900 
901 			wcn36xx_smd_set_link_st(wcn, bss_conf->bssid,
902 				vif->addr,
903 				WCN36XX_HAL_LINK_POSTASSOC_STATE);
904 			wcn36xx_smd_config_bss(wcn, vif, sta,
905 					       bss_conf->bssid,
906 					       true);
907 			sta_priv->aid = bss_conf->aid;
908 			/*
909 			 * config_sta must be called from  because this is the
910 			 * place where AID is available.
911 			 */
912 			wcn36xx_smd_config_sta(wcn, vif, sta);
913 			wcn36xx_enable_keep_alive_null_packet(wcn, vif);
914 		} else {
915 			wcn36xx_dbg(WCN36XX_DBG_MAC,
916 				    "disassociated bss %pM vif %pM AID=%d\n",
917 				    bss_conf->bssid,
918 				    vif->addr,
919 				    bss_conf->aid);
920 			vif_priv->sta_assoc = false;
921 			vif_priv->allow_bmps = false;
922 			wcn36xx_smd_set_link_st(wcn,
923 						bss_conf->bssid,
924 						vif->addr,
925 						WCN36XX_HAL_LINK_IDLE_STATE);
926 		}
927 	}
928 
929 	if (changed & BSS_CHANGED_AP_PROBE_RESP) {
930 		wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed ap probe resp\n");
931 		skb = ieee80211_proberesp_get(hw, vif);
932 		if (!skb) {
933 			wcn36xx_err("failed to alloc probereq skb\n");
934 			goto out;
935 		}
936 
937 		wcn36xx_smd_update_proberesp_tmpl(wcn, vif, skb);
938 		dev_kfree_skb(skb);
939 	}
940 
941 	if (changed & BSS_CHANGED_BEACON_ENABLED ||
942 	    changed & BSS_CHANGED_BEACON) {
943 		wcn36xx_dbg(WCN36XX_DBG_MAC,
944 			    "mac bss changed beacon enabled %d\n",
945 			    bss_conf->enable_beacon);
946 
947 		if (bss_conf->enable_beacon) {
948 			vif_priv->dtim_period = bss_conf->dtim_period;
949 			vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
950 			wcn36xx_smd_config_bss(wcn, vif, NULL,
951 					       vif->addr, false);
952 			skb = ieee80211_beacon_get_tim(hw, vif, &tim_off,
953 						       &tim_len);
954 			if (!skb) {
955 				wcn36xx_err("failed to alloc beacon skb\n");
956 				goto out;
957 			}
958 			wcn36xx_smd_send_beacon(wcn, vif, skb, tim_off, 0);
959 			dev_kfree_skb(skb);
960 
961 			if (vif->type == NL80211_IFTYPE_ADHOC ||
962 			    vif->type == NL80211_IFTYPE_MESH_POINT)
963 				link_state = WCN36XX_HAL_LINK_IBSS_STATE;
964 			else
965 				link_state = WCN36XX_HAL_LINK_AP_STATE;
966 
967 			wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
968 						link_state);
969 		} else {
970 			wcn36xx_smd_delete_bss(wcn, vif);
971 			wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
972 						WCN36XX_HAL_LINK_IDLE_STATE);
973 		}
974 	}
975 out:
976 
977 	mutex_unlock(&wcn->conf_mutex);
978 }
979 
980 /* this is required when using IEEE80211_HW_HAS_RATE_CONTROL */
981 static int wcn36xx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
982 {
983 	struct wcn36xx *wcn = hw->priv;
984 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac set RTS threshold %d\n", value);
985 
986 	mutex_lock(&wcn->conf_mutex);
987 	wcn36xx_smd_update_cfg(wcn, WCN36XX_HAL_CFG_RTS_THRESHOLD, value);
988 	mutex_unlock(&wcn->conf_mutex);
989 
990 	return 0;
991 }
992 
993 static void wcn36xx_remove_interface(struct ieee80211_hw *hw,
994 				     struct ieee80211_vif *vif)
995 {
996 	struct wcn36xx *wcn = hw->priv;
997 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
998 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac remove interface vif %p\n", vif);
999 
1000 	mutex_lock(&wcn->conf_mutex);
1001 
1002 	list_del(&vif_priv->list);
1003 	wcn36xx_smd_delete_sta_self(wcn, vif->addr);
1004 
1005 	mutex_unlock(&wcn->conf_mutex);
1006 }
1007 
1008 static int wcn36xx_add_interface(struct ieee80211_hw *hw,
1009 				 struct ieee80211_vif *vif)
1010 {
1011 	struct wcn36xx *wcn = hw->priv;
1012 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1013 
1014 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac add interface vif %p type %d\n",
1015 		    vif, vif->type);
1016 
1017 	if (!(NL80211_IFTYPE_STATION == vif->type ||
1018 	      NL80211_IFTYPE_AP == vif->type ||
1019 	      NL80211_IFTYPE_ADHOC == vif->type ||
1020 	      NL80211_IFTYPE_MESH_POINT == vif->type)) {
1021 		wcn36xx_warn("Unsupported interface type requested: %d\n",
1022 			     vif->type);
1023 		return -EOPNOTSUPP;
1024 	}
1025 
1026 	mutex_lock(&wcn->conf_mutex);
1027 
1028 	vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
1029 	INIT_LIST_HEAD(&vif_priv->sta_list);
1030 	list_add(&vif_priv->list, &wcn->vif_list);
1031 	wcn36xx_smd_add_sta_self(wcn, vif);
1032 
1033 	mutex_unlock(&wcn->conf_mutex);
1034 
1035 	return 0;
1036 }
1037 
1038 static int wcn36xx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1039 			   struct ieee80211_sta *sta)
1040 {
1041 	struct wcn36xx *wcn = hw->priv;
1042 	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1043 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1044 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta add vif %p sta %pM\n",
1045 		    vif, sta->addr);
1046 
1047 	mutex_lock(&wcn->conf_mutex);
1048 
1049 	spin_lock_init(&sta_priv->ampdu_lock);
1050 	sta_priv->vif = vif_priv;
1051 	list_add(&sta_priv->list, &vif_priv->sta_list);
1052 
1053 	/*
1054 	 * For STA mode HW will be configured on BSS_CHANGED_ASSOC because
1055 	 * at this stage AID is not available yet.
1056 	 */
1057 	if (NL80211_IFTYPE_STATION != vif->type) {
1058 		wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
1059 		sta_priv->aid = sta->aid;
1060 		wcn36xx_smd_config_sta(wcn, vif, sta);
1061 	}
1062 
1063 	mutex_unlock(&wcn->conf_mutex);
1064 
1065 	return 0;
1066 }
1067 
1068 static int wcn36xx_sta_remove(struct ieee80211_hw *hw,
1069 			      struct ieee80211_vif *vif,
1070 			      struct ieee80211_sta *sta)
1071 {
1072 	struct wcn36xx *wcn = hw->priv;
1073 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1074 
1075 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta remove vif %p sta %pM index %d\n",
1076 		    vif, sta->addr, sta_priv->sta_index);
1077 
1078 	mutex_lock(&wcn->conf_mutex);
1079 
1080 	list_del(&sta_priv->list);
1081 	wcn36xx_smd_delete_sta(wcn, sta_priv->sta_index);
1082 	sta_priv->vif = NULL;
1083 
1084 	mutex_unlock(&wcn->conf_mutex);
1085 
1086 	return 0;
1087 }
1088 
1089 #ifdef CONFIG_PM
1090 
1091 static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
1092 {
1093 	struct wcn36xx *wcn = hw->priv;
1094 
1095 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac suspend\n");
1096 
1097 	flush_workqueue(wcn->hal_ind_wq);
1098 	wcn36xx_smd_set_power_params(wcn, true);
1099 	return 0;
1100 }
1101 
1102 static int wcn36xx_resume(struct ieee80211_hw *hw)
1103 {
1104 	struct wcn36xx *wcn = hw->priv;
1105 
1106 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac resume\n");
1107 
1108 	flush_workqueue(wcn->hal_ind_wq);
1109 	wcn36xx_smd_set_power_params(wcn, false);
1110 	return 0;
1111 }
1112 
1113 #endif
1114 
1115 static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
1116 		    struct ieee80211_vif *vif,
1117 		    struct ieee80211_ampdu_params *params)
1118 {
1119 	struct wcn36xx *wcn = hw->priv;
1120 	struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(params->sta);
1121 	struct ieee80211_sta *sta = params->sta;
1122 	enum ieee80211_ampdu_mlme_action action = params->action;
1123 	u16 tid = params->tid;
1124 	u16 *ssn = &params->ssn;
1125 	int ret = 0;
1126 	u8 session;
1127 
1128 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu action action %d tid %d\n",
1129 		    action, tid);
1130 
1131 	mutex_lock(&wcn->conf_mutex);
1132 
1133 	switch (action) {
1134 	case IEEE80211_AMPDU_RX_START:
1135 		sta_priv->tid = tid;
1136 		session = wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 0,
1137 						     get_sta_index(vif, sta_priv));
1138 		wcn36xx_smd_add_ba(wcn, session);
1139 		wcn36xx_smd_trigger_ba(wcn, get_sta_index(vif, sta_priv), tid,
1140 				       session);
1141 		break;
1142 	case IEEE80211_AMPDU_RX_STOP:
1143 		wcn36xx_smd_del_ba(wcn, tid, 0, get_sta_index(vif, sta_priv));
1144 		break;
1145 	case IEEE80211_AMPDU_TX_START:
1146 		spin_lock_bh(&sta_priv->ampdu_lock);
1147 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
1148 		spin_unlock_bh(&sta_priv->ampdu_lock);
1149 
1150 		ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1151 		break;
1152 	case IEEE80211_AMPDU_TX_OPERATIONAL:
1153 		spin_lock_bh(&sta_priv->ampdu_lock);
1154 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_OPERATIONAL;
1155 		spin_unlock_bh(&sta_priv->ampdu_lock);
1156 
1157 		wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 1,
1158 			get_sta_index(vif, sta_priv));
1159 		break;
1160 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
1161 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1162 	case IEEE80211_AMPDU_TX_STOP_CONT:
1163 		spin_lock_bh(&sta_priv->ampdu_lock);
1164 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_NONE;
1165 		spin_unlock_bh(&sta_priv->ampdu_lock);
1166 
1167 		wcn36xx_smd_del_ba(wcn, tid, 1, get_sta_index(vif, sta_priv));
1168 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1169 		break;
1170 	default:
1171 		wcn36xx_err("Unknown AMPDU action\n");
1172 	}
1173 
1174 	mutex_unlock(&wcn->conf_mutex);
1175 
1176 	return ret;
1177 }
1178 
1179 static const struct ieee80211_ops wcn36xx_ops = {
1180 	.start			= wcn36xx_start,
1181 	.stop			= wcn36xx_stop,
1182 	.add_interface		= wcn36xx_add_interface,
1183 	.remove_interface	= wcn36xx_remove_interface,
1184 #ifdef CONFIG_PM
1185 	.suspend		= wcn36xx_suspend,
1186 	.resume			= wcn36xx_resume,
1187 #endif
1188 	.config			= wcn36xx_config,
1189 	.prepare_multicast	= wcn36xx_prepare_multicast,
1190 	.configure_filter       = wcn36xx_configure_filter,
1191 	.tx			= wcn36xx_tx,
1192 	.set_key		= wcn36xx_set_key,
1193 	.hw_scan		= wcn36xx_hw_scan,
1194 	.cancel_hw_scan		= wcn36xx_cancel_hw_scan,
1195 	.sw_scan_start		= wcn36xx_sw_scan_start,
1196 	.sw_scan_complete	= wcn36xx_sw_scan_complete,
1197 	.bss_info_changed	= wcn36xx_bss_info_changed,
1198 	.set_rts_threshold	= wcn36xx_set_rts_threshold,
1199 	.sta_add		= wcn36xx_sta_add,
1200 	.sta_remove		= wcn36xx_sta_remove,
1201 	.ampdu_action		= wcn36xx_ampdu_action,
1202 
1203 	CFG80211_TESTMODE_CMD(wcn36xx_tm_cmd)
1204 };
1205 
1206 static void
1207 wcn36xx_set_ieee80211_vht_caps(struct ieee80211_sta_vht_cap *vht_cap)
1208 {
1209 	vht_cap->vht_supported = true;
1210 
1211 	vht_cap->cap = (IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
1212 			IEEE80211_VHT_CAP_SHORT_GI_80 |
1213 			IEEE80211_VHT_CAP_RXSTBC_1 |
1214 			IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
1215 			IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE |
1216 			3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
1217 			7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
1218 
1219 	vht_cap->vht_mcs.rx_mcs_map =
1220 		cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 |
1221 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 2 |
1222 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
1223 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
1224 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
1225 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
1226 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
1227 			    IEEE80211_VHT_MCS_NOT_SUPPORTED << 14);
1228 
1229 	vht_cap->vht_mcs.rx_highest = cpu_to_le16(433);
1230 	vht_cap->vht_mcs.tx_highest = vht_cap->vht_mcs.rx_highest;
1231 
1232 	vht_cap->vht_mcs.tx_mcs_map = vht_cap->vht_mcs.rx_mcs_map;
1233 }
1234 
1235 static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
1236 {
1237 	static const u32 cipher_suites[] = {
1238 		WLAN_CIPHER_SUITE_WEP40,
1239 		WLAN_CIPHER_SUITE_WEP104,
1240 		WLAN_CIPHER_SUITE_TKIP,
1241 		WLAN_CIPHER_SUITE_CCMP,
1242 	};
1243 
1244 	ieee80211_hw_set(wcn->hw, TIMING_BEACON_ONLY);
1245 	ieee80211_hw_set(wcn->hw, AMPDU_AGGREGATION);
1246 	ieee80211_hw_set(wcn->hw, SUPPORTS_PS);
1247 	ieee80211_hw_set(wcn->hw, SIGNAL_DBM);
1248 	ieee80211_hw_set(wcn->hw, HAS_RATE_CONTROL);
1249 	ieee80211_hw_set(wcn->hw, SINGLE_SCAN_ON_ALL_BANDS);
1250 	ieee80211_hw_set(wcn->hw, REPORTS_TX_ACK_STATUS);
1251 	ieee80211_hw_set(wcn->hw, CONNECTION_MONITOR);
1252 
1253 	wcn->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1254 		BIT(NL80211_IFTYPE_AP) |
1255 		BIT(NL80211_IFTYPE_ADHOC) |
1256 		BIT(NL80211_IFTYPE_MESH_POINT);
1257 
1258 	wcn->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wcn_band_2ghz;
1259 	if (wcn->rf_id != RF_IRIS_WCN3620)
1260 		wcn->hw->wiphy->bands[NL80211_BAND_5GHZ] = &wcn_band_5ghz;
1261 
1262 	if (wcn->rf_id == RF_IRIS_WCN3680)
1263 		wcn36xx_set_ieee80211_vht_caps(&wcn_band_5ghz.vht_cap);
1264 
1265 	wcn->hw->wiphy->max_scan_ssids = WCN36XX_MAX_SCAN_SSIDS;
1266 	wcn->hw->wiphy->max_scan_ie_len = WCN36XX_MAX_SCAN_IE_LEN;
1267 
1268 	wcn->hw->wiphy->cipher_suites = cipher_suites;
1269 	wcn->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1270 
1271 #ifdef CONFIG_PM
1272 	wcn->hw->wiphy->wowlan = &wowlan_support;
1273 #endif
1274 
1275 	wcn->hw->max_listen_interval = 200;
1276 
1277 	wcn->hw->queues = 4;
1278 
1279 	SET_IEEE80211_DEV(wcn->hw, wcn->dev);
1280 
1281 	wcn->hw->sta_data_size = sizeof(struct wcn36xx_sta);
1282 	wcn->hw->vif_data_size = sizeof(struct wcn36xx_vif);
1283 
1284 	wiphy_ext_feature_set(wcn->hw->wiphy,
1285 			      NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1286 
1287 	return 0;
1288 }
1289 
1290 static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
1291 					  struct platform_device *pdev)
1292 {
1293 	struct device_node *mmio_node;
1294 	struct device_node *iris_node;
1295 	struct resource *res;
1296 	int index;
1297 	int ret;
1298 
1299 	/* Set TX IRQ */
1300 	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "tx");
1301 	if (!res) {
1302 		wcn36xx_err("failed to get tx_irq\n");
1303 		return -ENOENT;
1304 	}
1305 	wcn->tx_irq = res->start;
1306 
1307 	/* Set RX IRQ */
1308 	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "rx");
1309 	if (!res) {
1310 		wcn36xx_err("failed to get rx_irq\n");
1311 		return -ENOENT;
1312 	}
1313 	wcn->rx_irq = res->start;
1314 
1315 	/* Acquire SMSM tx enable handle */
1316 	wcn->tx_enable_state = qcom_smem_state_get(&pdev->dev,
1317 			"tx-enable", &wcn->tx_enable_state_bit);
1318 	if (IS_ERR(wcn->tx_enable_state)) {
1319 		wcn36xx_err("failed to get tx-enable state\n");
1320 		return PTR_ERR(wcn->tx_enable_state);
1321 	}
1322 
1323 	/* Acquire SMSM tx rings empty handle */
1324 	wcn->tx_rings_empty_state = qcom_smem_state_get(&pdev->dev,
1325 			"tx-rings-empty", &wcn->tx_rings_empty_state_bit);
1326 	if (IS_ERR(wcn->tx_rings_empty_state)) {
1327 		wcn36xx_err("failed to get tx-rings-empty state\n");
1328 		return PTR_ERR(wcn->tx_rings_empty_state);
1329 	}
1330 
1331 	mmio_node = of_parse_phandle(pdev->dev.parent->of_node, "qcom,mmio", 0);
1332 	if (!mmio_node) {
1333 		wcn36xx_err("failed to acquire qcom,mmio reference\n");
1334 		return -EINVAL;
1335 	}
1336 
1337 	wcn->is_pronto = !!of_device_is_compatible(mmio_node, "qcom,pronto");
1338 
1339 	/* Map the CCU memory */
1340 	index = of_property_match_string(mmio_node, "reg-names", "ccu");
1341 	wcn->ccu_base = of_iomap(mmio_node, index);
1342 	if (!wcn->ccu_base) {
1343 		wcn36xx_err("failed to map ccu memory\n");
1344 		ret = -ENOMEM;
1345 		goto put_mmio_node;
1346 	}
1347 
1348 	/* Map the DXE memory */
1349 	index = of_property_match_string(mmio_node, "reg-names", "dxe");
1350 	wcn->dxe_base = of_iomap(mmio_node, index);
1351 	if (!wcn->dxe_base) {
1352 		wcn36xx_err("failed to map dxe memory\n");
1353 		ret = -ENOMEM;
1354 		goto unmap_ccu;
1355 	}
1356 
1357 	/* External RF module */
1358 	iris_node = of_get_child_by_name(mmio_node, "iris");
1359 	if (iris_node) {
1360 		if (of_device_is_compatible(iris_node, "qcom,wcn3620"))
1361 			wcn->rf_id = RF_IRIS_WCN3620;
1362 		if (of_device_is_compatible(iris_node, "qcom,wcn3680"))
1363 			wcn->rf_id = RF_IRIS_WCN3680;
1364 		of_node_put(iris_node);
1365 	}
1366 
1367 	of_node_put(mmio_node);
1368 	return 0;
1369 
1370 unmap_ccu:
1371 	iounmap(wcn->ccu_base);
1372 put_mmio_node:
1373 	of_node_put(mmio_node);
1374 	return ret;
1375 }
1376 
1377 static int wcn36xx_probe(struct platform_device *pdev)
1378 {
1379 	struct ieee80211_hw *hw;
1380 	struct wcn36xx *wcn;
1381 	void *wcnss;
1382 	int ret;
1383 	const u8 *addr;
1384 
1385 	wcn36xx_dbg(WCN36XX_DBG_MAC, "platform probe\n");
1386 
1387 	wcnss = dev_get_drvdata(pdev->dev.parent);
1388 
1389 	hw = ieee80211_alloc_hw(sizeof(struct wcn36xx), &wcn36xx_ops);
1390 	if (!hw) {
1391 		wcn36xx_err("failed to alloc hw\n");
1392 		ret = -ENOMEM;
1393 		goto out_err;
1394 	}
1395 	platform_set_drvdata(pdev, hw);
1396 	wcn = hw->priv;
1397 	wcn->hw = hw;
1398 	wcn->dev = &pdev->dev;
1399 	wcn->first_boot = true;
1400 	mutex_init(&wcn->conf_mutex);
1401 	mutex_init(&wcn->hal_mutex);
1402 	mutex_init(&wcn->scan_lock);
1403 
1404 	ret = dma_set_mask_and_coherent(wcn->dev, DMA_BIT_MASK(32));
1405 	if (ret < 0) {
1406 		wcn36xx_err("failed to set DMA mask: %d\n", ret);
1407 		goto out_wq;
1408 	}
1409 
1410 	wcn->smd_channel = qcom_wcnss_open_channel(wcnss, "WLAN_CTRL", wcn36xx_smd_rsp_process, hw);
1411 	if (IS_ERR(wcn->smd_channel)) {
1412 		wcn36xx_err("failed to open WLAN_CTRL channel\n");
1413 		ret = PTR_ERR(wcn->smd_channel);
1414 		goto out_wq;
1415 	}
1416 
1417 	addr = of_get_property(pdev->dev.of_node, "local-mac-address", &ret);
1418 	if (addr && ret != ETH_ALEN) {
1419 		wcn36xx_err("invalid local-mac-address\n");
1420 		ret = -EINVAL;
1421 		goto out_destroy_ept;
1422 	} else if (addr) {
1423 		wcn36xx_info("mac address: %pM\n", addr);
1424 		SET_IEEE80211_PERM_ADDR(wcn->hw, addr);
1425 	}
1426 
1427 	ret = wcn36xx_platform_get_resources(wcn, pdev);
1428 	if (ret)
1429 		goto out_destroy_ept;
1430 
1431 	wcn36xx_init_ieee80211(wcn);
1432 	ret = ieee80211_register_hw(wcn->hw);
1433 	if (ret)
1434 		goto out_unmap;
1435 
1436 	return 0;
1437 
1438 out_unmap:
1439 	iounmap(wcn->ccu_base);
1440 	iounmap(wcn->dxe_base);
1441 out_destroy_ept:
1442 	rpmsg_destroy_ept(wcn->smd_channel);
1443 out_wq:
1444 	ieee80211_free_hw(hw);
1445 out_err:
1446 	return ret;
1447 }
1448 
1449 static int wcn36xx_remove(struct platform_device *pdev)
1450 {
1451 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
1452 	struct wcn36xx *wcn = hw->priv;
1453 	wcn36xx_dbg(WCN36XX_DBG_MAC, "platform remove\n");
1454 
1455 	release_firmware(wcn->nv);
1456 
1457 	ieee80211_unregister_hw(hw);
1458 
1459 	qcom_smem_state_put(wcn->tx_enable_state);
1460 	qcom_smem_state_put(wcn->tx_rings_empty_state);
1461 
1462 	rpmsg_destroy_ept(wcn->smd_channel);
1463 
1464 	iounmap(wcn->dxe_base);
1465 	iounmap(wcn->ccu_base);
1466 
1467 	mutex_destroy(&wcn->hal_mutex);
1468 	ieee80211_free_hw(hw);
1469 
1470 	return 0;
1471 }
1472 
1473 static const struct of_device_id wcn36xx_of_match[] = {
1474 	{ .compatible = "qcom,wcnss-wlan" },
1475 	{}
1476 };
1477 MODULE_DEVICE_TABLE(of, wcn36xx_of_match);
1478 
1479 static struct platform_driver wcn36xx_driver = {
1480 	.probe      = wcn36xx_probe,
1481 	.remove     = wcn36xx_remove,
1482 	.driver         = {
1483 		.name   = "wcn36xx",
1484 		.of_match_table = wcn36xx_of_match,
1485 	},
1486 };
1487 
1488 module_platform_driver(wcn36xx_driver);
1489 
1490 MODULE_LICENSE("Dual BSD/GPL");
1491 MODULE_AUTHOR("Eugene Krasnikov k.eugene.e@gmail.com");
1492 MODULE_FIRMWARE(WLAN_NV_FILE);
1493