1 /**
2 * Copyright (c) 2014 Redpine Signals Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <linux/etherdevice.h>
18 #include "rsi_debugfs.h"
19 #include "rsi_mgmt.h"
20 #include "rsi_sdio.h"
21 #include "rsi_common.h"
22 #include "rsi_ps.h"
23
24 static const struct ieee80211_channel rsi_2ghz_channels[] = {
25 { .band = NL80211_BAND_2GHZ, .center_freq = 2412,
26 .hw_value = 1 }, /* Channel 1 */
27 { .band = NL80211_BAND_2GHZ, .center_freq = 2417,
28 .hw_value = 2 }, /* Channel 2 */
29 { .band = NL80211_BAND_2GHZ, .center_freq = 2422,
30 .hw_value = 3 }, /* Channel 3 */
31 { .band = NL80211_BAND_2GHZ, .center_freq = 2427,
32 .hw_value = 4 }, /* Channel 4 */
33 { .band = NL80211_BAND_2GHZ, .center_freq = 2432,
34 .hw_value = 5 }, /* Channel 5 */
35 { .band = NL80211_BAND_2GHZ, .center_freq = 2437,
36 .hw_value = 6 }, /* Channel 6 */
37 { .band = NL80211_BAND_2GHZ, .center_freq = 2442,
38 .hw_value = 7 }, /* Channel 7 */
39 { .band = NL80211_BAND_2GHZ, .center_freq = 2447,
40 .hw_value = 8 }, /* Channel 8 */
41 { .band = NL80211_BAND_2GHZ, .center_freq = 2452,
42 .hw_value = 9 }, /* Channel 9 */
43 { .band = NL80211_BAND_2GHZ, .center_freq = 2457,
44 .hw_value = 10 }, /* Channel 10 */
45 { .band = NL80211_BAND_2GHZ, .center_freq = 2462,
46 .hw_value = 11 }, /* Channel 11 */
47 { .band = NL80211_BAND_2GHZ, .center_freq = 2467,
48 .hw_value = 12 }, /* Channel 12 */
49 { .band = NL80211_BAND_2GHZ, .center_freq = 2472,
50 .hw_value = 13 }, /* Channel 13 */
51 { .band = NL80211_BAND_2GHZ, .center_freq = 2484,
52 .hw_value = 14 }, /* Channel 14 */
53 };
54
55 static const struct ieee80211_channel rsi_5ghz_channels[] = {
56 { .band = NL80211_BAND_5GHZ, .center_freq = 5180,
57 .hw_value = 36, }, /* Channel 36 */
58 { .band = NL80211_BAND_5GHZ, .center_freq = 5200,
59 .hw_value = 40, }, /* Channel 40 */
60 { .band = NL80211_BAND_5GHZ, .center_freq = 5220,
61 .hw_value = 44, }, /* Channel 44 */
62 { .band = NL80211_BAND_5GHZ, .center_freq = 5240,
63 .hw_value = 48, }, /* Channel 48 */
64 { .band = NL80211_BAND_5GHZ, .center_freq = 5260,
65 .hw_value = 52, }, /* Channel 52 */
66 { .band = NL80211_BAND_5GHZ, .center_freq = 5280,
67 .hw_value = 56, }, /* Channel 56 */
68 { .band = NL80211_BAND_5GHZ, .center_freq = 5300,
69 .hw_value = 60, }, /* Channel 60 */
70 { .band = NL80211_BAND_5GHZ, .center_freq = 5320,
71 .hw_value = 64, }, /* Channel 64 */
72 { .band = NL80211_BAND_5GHZ, .center_freq = 5500,
73 .hw_value = 100, }, /* Channel 100 */
74 { .band = NL80211_BAND_5GHZ, .center_freq = 5520,
75 .hw_value = 104, }, /* Channel 104 */
76 { .band = NL80211_BAND_5GHZ, .center_freq = 5540,
77 .hw_value = 108, }, /* Channel 108 */
78 { .band = NL80211_BAND_5GHZ, .center_freq = 5560,
79 .hw_value = 112, }, /* Channel 112 */
80 { .band = NL80211_BAND_5GHZ, .center_freq = 5580,
81 .hw_value = 116, }, /* Channel 116 */
82 { .band = NL80211_BAND_5GHZ, .center_freq = 5600,
83 .hw_value = 120, }, /* Channel 120 */
84 { .band = NL80211_BAND_5GHZ, .center_freq = 5620,
85 .hw_value = 124, }, /* Channel 124 */
86 { .band = NL80211_BAND_5GHZ, .center_freq = 5640,
87 .hw_value = 128, }, /* Channel 128 */
88 { .band = NL80211_BAND_5GHZ, .center_freq = 5660,
89 .hw_value = 132, }, /* Channel 132 */
90 { .band = NL80211_BAND_5GHZ, .center_freq = 5680,
91 .hw_value = 136, }, /* Channel 136 */
92 { .band = NL80211_BAND_5GHZ, .center_freq = 5700,
93 .hw_value = 140, }, /* Channel 140 */
94 { .band = NL80211_BAND_5GHZ, .center_freq = 5745,
95 .hw_value = 149, }, /* Channel 149 */
96 { .band = NL80211_BAND_5GHZ, .center_freq = 5765,
97 .hw_value = 153, }, /* Channel 153 */
98 { .band = NL80211_BAND_5GHZ, .center_freq = 5785,
99 .hw_value = 157, }, /* Channel 157 */
100 { .band = NL80211_BAND_5GHZ, .center_freq = 5805,
101 .hw_value = 161, }, /* Channel 161 */
102 { .band = NL80211_BAND_5GHZ, .center_freq = 5825,
103 .hw_value = 165, }, /* Channel 165 */
104 };
105
106 struct ieee80211_rate rsi_rates[12] = {
107 { .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 },
108 { .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 },
109 { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
110 { .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 },
111 { .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 },
112 { .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 },
113 { .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 },
114 { .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 },
115 { .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 },
116 { .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 },
117 { .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 },
118 { .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 },
119 };
120
121 const u16 rsi_mcsrates[8] = {
122 RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
123 RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
124 };
125
126 static const u32 rsi_max_ap_stas[16] = {
127 32, /* 1 - Wi-Fi alone */
128 0, /* 2 */
129 0, /* 3 */
130 0, /* 4 - BT EDR alone */
131 4, /* 5 - STA + BT EDR */
132 32, /* 6 - AP + BT EDR */
133 0, /* 7 */
134 0, /* 8 - BT LE alone */
135 4, /* 9 - STA + BE LE */
136 0, /* 10 */
137 0, /* 11 */
138 0, /* 12 */
139 1, /* 13 - STA + BT Dual */
140 4, /* 14 - AP + BT Dual */
141 };
142
143 static const struct ieee80211_iface_limit rsi_iface_limits[] = {
144 {
145 .max = 1,
146 .types = BIT(NL80211_IFTYPE_STATION),
147 },
148 {
149 .max = 1,
150 .types = BIT(NL80211_IFTYPE_AP) |
151 BIT(NL80211_IFTYPE_P2P_CLIENT) |
152 BIT(NL80211_IFTYPE_P2P_GO),
153 },
154 {
155 .max = 1,
156 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
157 },
158 };
159
160 static const struct ieee80211_iface_combination rsi_iface_combinations[] = {
161 {
162 .num_different_channels = 1,
163 .max_interfaces = 3,
164 .limits = rsi_iface_limits,
165 .n_limits = ARRAY_SIZE(rsi_iface_limits),
166 },
167 };
168
169 /**
170 * rsi_is_cipher_wep() - This function determines if the cipher is WEP or not.
171 * @common: Pointer to the driver private structure.
172 *
173 * Return: If cipher type is WEP, a value of 1 is returned, else 0.
174 */
175
rsi_is_cipher_wep(struct rsi_common * common)176 bool rsi_is_cipher_wep(struct rsi_common *common)
177 {
178 if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
179 (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
180 (!common->secinfo.ptk_cipher))
181 return true;
182 else
183 return false;
184 }
185
186 /**
187 * rsi_register_rates_channels() - This function registers channels and rates.
188 * @adapter: Pointer to the adapter structure.
189 * @band: Operating band to be set.
190 *
191 * Return: int - 0 on success, negative error on failure.
192 */
rsi_register_rates_channels(struct rsi_hw * adapter,int band)193 static int rsi_register_rates_channels(struct rsi_hw *adapter, int band)
194 {
195 struct ieee80211_supported_band *sbands = &adapter->sbands[band];
196 void *channels = NULL;
197
198 if (band == NL80211_BAND_2GHZ) {
199 channels = kmemdup(rsi_2ghz_channels, sizeof(rsi_2ghz_channels),
200 GFP_KERNEL);
201 if (!channels)
202 return -ENOMEM;
203 sbands->band = NL80211_BAND_2GHZ;
204 sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
205 sbands->bitrates = rsi_rates;
206 sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
207 } else {
208 channels = kmemdup(rsi_5ghz_channels, sizeof(rsi_5ghz_channels),
209 GFP_KERNEL);
210 if (!channels)
211 return -ENOMEM;
212 sbands->band = NL80211_BAND_5GHZ;
213 sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
214 sbands->bitrates = &rsi_rates[4];
215 sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
216 }
217
218 sbands->channels = channels;
219
220 memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
221 sbands->ht_cap.ht_supported = true;
222 sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
223 IEEE80211_HT_CAP_SGI_20 |
224 IEEE80211_HT_CAP_SGI_40);
225 sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
226 sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
227 sbands->ht_cap.mcs.rx_mask[0] = 0xff;
228 sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
229 /* sbands->ht_cap.mcs.rx_highest = 0x82; */
230 return 0;
231 }
232
233 /**
234 * rsi_mac80211_detach() - This function is used to de-initialize the
235 * Mac80211 stack.
236 * @adapter: Pointer to the adapter structure.
237 *
238 * Return: None.
239 */
rsi_mac80211_detach(struct rsi_hw * adapter)240 void rsi_mac80211_detach(struct rsi_hw *adapter)
241 {
242 struct ieee80211_hw *hw = adapter->hw;
243 enum nl80211_band band;
244
245 if (hw) {
246 ieee80211_stop_queues(hw);
247 ieee80211_unregister_hw(hw);
248 ieee80211_free_hw(hw);
249 adapter->hw = NULL;
250 }
251
252 for (band = 0; band < NUM_NL80211_BANDS; band++) {
253 struct ieee80211_supported_band *sband =
254 &adapter->sbands[band];
255
256 kfree(sband->channels);
257 }
258
259 #ifdef CONFIG_RSI_DEBUGFS
260 rsi_remove_dbgfs(adapter);
261 kfree(adapter->dfsentry);
262 #endif
263 }
264 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
265
266 /**
267 * rsi_indicate_tx_status() - This function indicates the transmit status.
268 * @adapter: Pointer to the adapter structure.
269 * @skb: Pointer to the socket buffer structure.
270 * @status: Status
271 *
272 * Return: None.
273 */
rsi_indicate_tx_status(struct rsi_hw * adapter,struct sk_buff * skb,int status)274 void rsi_indicate_tx_status(struct rsi_hw *adapter,
275 struct sk_buff *skb,
276 int status)
277 {
278 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
279 struct skb_info *tx_params;
280
281 if (!adapter->hw) {
282 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
283 return;
284 }
285
286 if (!status)
287 info->flags |= IEEE80211_TX_STAT_ACK;
288
289 tx_params = (struct skb_info *)info->driver_data;
290 skb_pull(skb, tx_params->internal_hdr_size);
291 memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
292
293 ieee80211_tx_status_irqsafe(adapter->hw, skb);
294 }
295
296 /**
297 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
298 * transmitted frame.SKB contains the buffer starting
299 * from the IEEE 802.11 header.
300 * @hw: Pointer to the ieee80211_hw structure.
301 * @control: Pointer to the ieee80211_tx_control structure
302 * @skb: Pointer to the socket buffer structure.
303 *
304 * Return: None
305 */
rsi_mac80211_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)306 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
307 struct ieee80211_tx_control *control,
308 struct sk_buff *skb)
309 {
310 struct rsi_hw *adapter = hw->priv;
311 struct rsi_common *common = adapter->priv;
312
313 rsi_core_xmit(common, skb);
314 }
315
316 /**
317 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
318 * the driver init is complete by then, just
319 * returns success.
320 * @hw: Pointer to the ieee80211_hw structure.
321 *
322 * Return: 0 as success.
323 */
rsi_mac80211_start(struct ieee80211_hw * hw)324 static int rsi_mac80211_start(struct ieee80211_hw *hw)
325 {
326 struct rsi_hw *adapter = hw->priv;
327 struct rsi_common *common = adapter->priv;
328
329 rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
330 mutex_lock(&common->mutex);
331 if (common->hibernate_resume) {
332 common->reinit_hw = true;
333 adapter->host_intf_ops->reinit_device(adapter);
334 wait_for_completion(&adapter->priv->wlan_init_completion);
335 }
336 common->iface_down = false;
337 wiphy_rfkill_start_polling(hw->wiphy);
338 rsi_send_rx_filter_frame(common, 0);
339 mutex_unlock(&common->mutex);
340
341 return 0;
342 }
343
344 /**
345 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
346 * @hw: Pointer to the ieee80211_hw structure.
347 *
348 * Return: None.
349 */
rsi_mac80211_stop(struct ieee80211_hw * hw)350 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
351 {
352 struct rsi_hw *adapter = hw->priv;
353 struct rsi_common *common = adapter->priv;
354
355 rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
356 mutex_lock(&common->mutex);
357 common->iface_down = true;
358 wiphy_rfkill_stop_polling(hw->wiphy);
359
360 /* Block all rx frames */
361 rsi_send_rx_filter_frame(common, 0xffff);
362
363 mutex_unlock(&common->mutex);
364 }
365
rsi_map_intf_mode(enum nl80211_iftype vif_type)366 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
367 {
368 switch (vif_type) {
369 case NL80211_IFTYPE_STATION:
370 return RSI_OPMODE_STA;
371 case NL80211_IFTYPE_AP:
372 return RSI_OPMODE_AP;
373 case NL80211_IFTYPE_P2P_DEVICE:
374 return RSI_OPMODE_P2P_CLIENT;
375 case NL80211_IFTYPE_P2P_CLIENT:
376 return RSI_OPMODE_P2P_CLIENT;
377 case NL80211_IFTYPE_P2P_GO:
378 return RSI_OPMODE_P2P_GO;
379 default:
380 return RSI_OPMODE_UNSUPPORTED;
381 }
382 }
383
384 /**
385 * rsi_mac80211_add_interface() - This function is called when a netdevice
386 * attached to the hardware is enabled.
387 * @hw: Pointer to the ieee80211_hw structure.
388 * @vif: Pointer to the ieee80211_vif structure.
389 *
390 * Return: ret: 0 on success, negative error code on failure.
391 */
rsi_mac80211_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)392 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
393 struct ieee80211_vif *vif)
394 {
395 struct rsi_hw *adapter = hw->priv;
396 struct rsi_common *common = adapter->priv;
397 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
398 enum opmode intf_mode;
399 enum vap_status vap_status;
400 int vap_idx = -1, i;
401
402 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
403 mutex_lock(&common->mutex);
404
405 intf_mode = rsi_map_intf_mode(vif->type);
406 if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
407 rsi_dbg(ERR_ZONE,
408 "%s: Interface type %d not supported\n", __func__,
409 vif->type);
410 mutex_unlock(&common->mutex);
411 return -EOPNOTSUPP;
412 }
413 if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
414 (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
415 (vif->type == NL80211_IFTYPE_P2P_GO))
416 common->p2p_enabled = true;
417
418 /* Get free vap index */
419 for (i = 0; i < RSI_MAX_VIFS; i++) {
420 if (!adapter->vifs[i] ||
421 !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
422 vap_idx = i;
423 break;
424 }
425 }
426 if (vap_idx < 0) {
427 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
428 mutex_unlock(&common->mutex);
429 return -EOPNOTSUPP;
430 }
431 vif_info->vap_id = vap_idx;
432 adapter->vifs[vap_idx] = vif;
433 adapter->sc_nvifs++;
434 vap_status = VAP_ADD;
435
436 if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
437 vif_info->vap_id, vap_status)) {
438 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
439 mutex_unlock(&common->mutex);
440 return -EINVAL;
441 }
442
443 if ((vif->type == NL80211_IFTYPE_AP) ||
444 (vif->type == NL80211_IFTYPE_P2P_GO)) {
445 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
446 common->min_rate = RSI_RATE_AUTO;
447 for (i = 0; i < common->max_stations; i++)
448 common->stations[i].sta = NULL;
449 }
450
451 mutex_unlock(&common->mutex);
452
453 return 0;
454 }
455
456 /**
457 * rsi_mac80211_remove_interface() - This function notifies driver that an
458 * interface is going down.
459 * @hw: Pointer to the ieee80211_hw structure.
460 * @vif: Pointer to the ieee80211_vif structure.
461 *
462 * Return: None.
463 */
rsi_mac80211_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)464 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
465 struct ieee80211_vif *vif)
466 {
467 struct rsi_hw *adapter = hw->priv;
468 struct rsi_common *common = adapter->priv;
469 enum opmode opmode;
470 int i;
471
472 rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
473
474 mutex_lock(&common->mutex);
475
476 if (adapter->sc_nvifs <= 0) {
477 mutex_unlock(&common->mutex);
478 return;
479 }
480
481 opmode = rsi_map_intf_mode(vif->type);
482 if (opmode == RSI_OPMODE_UNSUPPORTED) {
483 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
484 mutex_unlock(&common->mutex);
485 return;
486 }
487 for (i = 0; i < RSI_MAX_VIFS; i++) {
488 if (!adapter->vifs[i])
489 continue;
490 if (vif == adapter->vifs[i]) {
491 rsi_set_vap_capabilities(common, opmode, vif->addr,
492 i, VAP_DELETE);
493 adapter->sc_nvifs--;
494 adapter->vifs[i] = NULL;
495 }
496 }
497 mutex_unlock(&common->mutex);
498 }
499
500 /**
501 * rsi_channel_change() - This function is a performs the checks
502 * required for changing a channel and sets
503 * the channel accordingly.
504 * @hw: Pointer to the ieee80211_hw structure.
505 *
506 * Return: 0 on success, negative error code on failure.
507 */
rsi_channel_change(struct ieee80211_hw * hw)508 static int rsi_channel_change(struct ieee80211_hw *hw)
509 {
510 struct rsi_hw *adapter = hw->priv;
511 struct rsi_common *common = adapter->priv;
512 int status = -EOPNOTSUPP;
513 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
514 u16 channel = curchan->hw_value;
515 struct ieee80211_vif *vif;
516 struct ieee80211_bss_conf *bss;
517 bool assoc = false;
518 int i;
519
520 rsi_dbg(INFO_ZONE,
521 "%s: Set channel: %d MHz type: %d channel_no %d\n",
522 __func__, curchan->center_freq,
523 curchan->flags, channel);
524
525 for (i = 0; i < RSI_MAX_VIFS; i++) {
526 vif = adapter->vifs[i];
527 if (!vif)
528 continue;
529 if (vif->type == NL80211_IFTYPE_STATION) {
530 bss = &vif->bss_conf;
531 if (bss->assoc) {
532 assoc = true;
533 break;
534 }
535 }
536 }
537 if (assoc) {
538 if (!common->hw_data_qs_blocked &&
539 (rsi_get_connected_channel(vif) != channel)) {
540 rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
541 if (!rsi_send_block_unblock_frame(common, true))
542 common->hw_data_qs_blocked = true;
543 }
544 }
545
546 status = rsi_band_check(common, curchan);
547 if (!status)
548 status = rsi_set_channel(adapter->priv, curchan);
549
550 if (assoc) {
551 if (common->hw_data_qs_blocked &&
552 (rsi_get_connected_channel(vif) == channel)) {
553 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
554 if (!rsi_send_block_unblock_frame(common, false))
555 common->hw_data_qs_blocked = false;
556 }
557 }
558
559 return status;
560 }
561
562 /**
563 * rsi_config_power() - This function configures tx power to device
564 * @hw: Pointer to the ieee80211_hw structure.
565 *
566 * Return: 0 on success, negative error code on failure.
567 */
rsi_config_power(struct ieee80211_hw * hw)568 static int rsi_config_power(struct ieee80211_hw *hw)
569 {
570 struct rsi_hw *adapter = hw->priv;
571 struct rsi_common *common = adapter->priv;
572 struct ieee80211_conf *conf = &hw->conf;
573
574 if (adapter->sc_nvifs <= 0) {
575 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
576 return -EINVAL;
577 }
578
579 rsi_dbg(INFO_ZONE,
580 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
581
582 if (conf->power_level == common->tx_power)
583 return 0;
584
585 common->tx_power = conf->power_level;
586
587 return rsi_send_radio_params_update(common);
588 }
589
590 /**
591 * rsi_mac80211_config() - This function is a handler for configuration
592 * requests. The stack calls this function to
593 * change hardware configuration, e.g., channel.
594 * @hw: Pointer to the ieee80211_hw structure.
595 * @changed: Changed flags set.
596 *
597 * Return: 0 on success, negative error code on failure.
598 */
rsi_mac80211_config(struct ieee80211_hw * hw,u32 changed)599 static int rsi_mac80211_config(struct ieee80211_hw *hw,
600 u32 changed)
601 {
602 struct rsi_hw *adapter = hw->priv;
603 struct rsi_common *common = adapter->priv;
604 struct ieee80211_conf *conf = &hw->conf;
605 int status = -EOPNOTSUPP;
606
607 mutex_lock(&common->mutex);
608
609 if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
610 status = rsi_channel_change(hw);
611
612 /* tx power */
613 if (changed & IEEE80211_CONF_CHANGE_POWER) {
614 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
615 status = rsi_config_power(hw);
616 }
617
618 /* Power save parameters */
619 if (changed & IEEE80211_CONF_CHANGE_PS) {
620 struct ieee80211_vif *vif, *sta_vif = NULL;
621 unsigned long flags;
622 int i, set_ps = 1;
623
624 for (i = 0; i < RSI_MAX_VIFS; i++) {
625 vif = adapter->vifs[i];
626 if (!vif)
627 continue;
628 /* Don't go to power save if AP vap exists */
629 if ((vif->type == NL80211_IFTYPE_AP) ||
630 (vif->type == NL80211_IFTYPE_P2P_GO)) {
631 set_ps = 0;
632 break;
633 }
634 if ((vif->type == NL80211_IFTYPE_STATION ||
635 vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
636 (!sta_vif || vif->bss_conf.assoc))
637 sta_vif = vif;
638 }
639 if (set_ps && sta_vif) {
640 spin_lock_irqsave(&adapter->ps_lock, flags);
641 if (conf->flags & IEEE80211_CONF_PS)
642 rsi_enable_ps(adapter, sta_vif);
643 else
644 rsi_disable_ps(adapter, sta_vif);
645 spin_unlock_irqrestore(&adapter->ps_lock, flags);
646 }
647 }
648
649 /* RTS threshold */
650 if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
651 rsi_dbg(INFO_ZONE, "RTS threshold\n");
652 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
653 rsi_dbg(INFO_ZONE,
654 "%s: Sending vap updates....\n", __func__);
655 status = rsi_send_vap_dynamic_update(common);
656 }
657 }
658 mutex_unlock(&common->mutex);
659
660 return status;
661 }
662
663 /**
664 * rsi_get_connected_channel() - This function is used to get the current
665 * connected channel number.
666 * @adapter: Pointer to the adapter structure.
667 *
668 * Return: Current connected AP's channel number is returned.
669 */
rsi_get_connected_channel(struct ieee80211_vif * vif)670 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
671 {
672 struct ieee80211_bss_conf *bss;
673 struct ieee80211_channel *channel;
674
675 if (!vif)
676 return 0;
677
678 bss = &vif->bss_conf;
679 channel = bss->chandef.chan;
680
681 if (!channel)
682 return 0;
683
684 return channel->hw_value;
685 }
686
rsi_switch_channel(struct rsi_hw * adapter,struct ieee80211_vif * vif)687 static void rsi_switch_channel(struct rsi_hw *adapter,
688 struct ieee80211_vif *vif)
689 {
690 struct rsi_common *common = adapter->priv;
691 struct ieee80211_channel *channel;
692
693 if (common->iface_down)
694 return;
695 if (!vif)
696 return;
697
698 channel = vif->bss_conf.chandef.chan;
699
700 if (!channel)
701 return;
702
703 rsi_band_check(common, channel);
704 rsi_set_channel(common, channel);
705 rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
706 }
707
708 /**
709 * rsi_mac80211_bss_info_changed() - This function is a handler for config
710 * requests related to BSS parameters that
711 * may vary during BSS's lifespan.
712 * @hw: Pointer to the ieee80211_hw structure.
713 * @vif: Pointer to the ieee80211_vif structure.
714 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
715 * @changed: Changed flags set.
716 *
717 * Return: None.
718 */
rsi_mac80211_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changed)719 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
720 struct ieee80211_vif *vif,
721 struct ieee80211_bss_conf *bss_conf,
722 u32 changed)
723 {
724 struct rsi_hw *adapter = hw->priv;
725 struct rsi_common *common = adapter->priv;
726 struct ieee80211_bss_conf *bss = &vif->bss_conf;
727 struct ieee80211_conf *conf = &hw->conf;
728 u16 rx_filter_word = 0;
729
730 mutex_lock(&common->mutex);
731 if (changed & BSS_CHANGED_ASSOC) {
732 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
733 __func__, bss_conf->assoc);
734 if (bss_conf->assoc) {
735 /* Send the RX filter frame */
736 rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
737 ALLOW_CTRL_ASSOC_PEER |
738 ALLOW_MGMT_ASSOC_PEER);
739 rsi_send_rx_filter_frame(common, rx_filter_word);
740 }
741 rsi_inform_bss_status(common,
742 RSI_OPMODE_STA,
743 bss_conf->assoc,
744 bss_conf->bssid,
745 bss_conf->qos,
746 bss_conf->aid,
747 NULL, 0,
748 bss_conf->assoc_capability, vif);
749 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
750 adapter->ps_info.listen_interval = conf->listen_interval;
751
752 /* If U-APSD is updated, send ps parameters to firmware */
753 if (bss->assoc) {
754 if (common->uapsd_bitmap) {
755 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
756 rsi_conf_uapsd(adapter, vif);
757 }
758 } else {
759 common->uapsd_bitmap = 0;
760 }
761 }
762
763 if (changed & BSS_CHANGED_CQM) {
764 common->cqm_info.last_cqm_event_rssi = 0;
765 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
766 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
767 rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
768 common->cqm_info.rssi_thold,
769 common->cqm_info.rssi_hyst);
770 }
771
772 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
773 ((vif->type == NL80211_IFTYPE_AP) ||
774 (vif->type == NL80211_IFTYPE_P2P_GO))) {
775 if (bss->enable_beacon) {
776 rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
777 common->beacon_enabled = 1;
778 } else {
779 rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
780 common->beacon_enabled = 0;
781 }
782 }
783
784 mutex_unlock(&common->mutex);
785 }
786
787 /**
788 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
789 * @hw: Pointer to the ieee80211_hw structure.
790 * @changed: Changed flags set.
791 * @total_flags: Total initial flags set.
792 * @multicast: Multicast.
793 *
794 * Return: None.
795 */
rsi_mac80211_conf_filter(struct ieee80211_hw * hw,u32 changed_flags,u32 * total_flags,u64 multicast)796 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
797 u32 changed_flags,
798 u32 *total_flags,
799 u64 multicast)
800 {
801 /* Not doing much here as of now */
802 *total_flags &= RSI_SUPP_FILTERS;
803 }
804
805 /**
806 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
807 * (EDCF (aifs, cw_min, cw_max), bursting)
808 * for a hardware TX queue.
809 * @hw: Pointer to the ieee80211_hw structure
810 * @vif: Pointer to the ieee80211_vif structure.
811 * @queue: Queue number.
812 * @params: Pointer to ieee80211_tx_queue_params structure.
813 *
814 * Return: 0 on success, negative error code on failure.
815 */
rsi_mac80211_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)816 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
817 struct ieee80211_vif *vif, u16 queue,
818 const struct ieee80211_tx_queue_params *params)
819 {
820 struct rsi_hw *adapter = hw->priv;
821 struct rsi_common *common = adapter->priv;
822 u8 idx = 0;
823
824 if (queue >= IEEE80211_NUM_ACS)
825 return 0;
826
827 rsi_dbg(INFO_ZONE,
828 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
829 __func__, queue, params->aifs,
830 params->cw_min, params->cw_max, params->txop);
831
832 mutex_lock(&common->mutex);
833 /* Map into the way the f/w expects */
834 switch (queue) {
835 case IEEE80211_AC_VO:
836 idx = VO_Q;
837 break;
838 case IEEE80211_AC_VI:
839 idx = VI_Q;
840 break;
841 case IEEE80211_AC_BE:
842 idx = BE_Q;
843 break;
844 case IEEE80211_AC_BK:
845 idx = BK_Q;
846 break;
847 default:
848 idx = BE_Q;
849 break;
850 }
851
852 memcpy(&common->edca_params[idx],
853 params,
854 sizeof(struct ieee80211_tx_queue_params));
855
856 if (params->uapsd)
857 common->uapsd_bitmap |= idx;
858 else
859 common->uapsd_bitmap &= (~idx);
860
861 mutex_unlock(&common->mutex);
862
863 return 0;
864 }
865
866 /**
867 * rsi_hal_key_config() - This function loads the keys into the firmware.
868 * @hw: Pointer to the ieee80211_hw structure.
869 * @vif: Pointer to the ieee80211_vif structure.
870 * @key: Pointer to the ieee80211_key_conf structure.
871 *
872 * Return: status: 0 on success, negative error codes on failure.
873 */
rsi_hal_key_config(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * key,struct ieee80211_sta * sta)874 static int rsi_hal_key_config(struct ieee80211_hw *hw,
875 struct ieee80211_vif *vif,
876 struct ieee80211_key_conf *key,
877 struct ieee80211_sta *sta)
878 {
879 struct rsi_hw *adapter = hw->priv;
880 struct rsi_sta *rsta = NULL;
881 int status;
882 u8 key_type;
883 s16 sta_id = 0;
884
885 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
886 key_type = RSI_PAIRWISE_KEY;
887 else
888 key_type = RSI_GROUP_KEY;
889
890 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
891 __func__, key->cipher, key_type, key->keylen);
892
893 if ((vif->type == NL80211_IFTYPE_AP) ||
894 (vif->type == NL80211_IFTYPE_P2P_GO)) {
895 if (sta) {
896 rsta = rsi_find_sta(adapter->priv, sta->addr);
897 if (rsta)
898 sta_id = rsta->sta_id;
899 }
900 adapter->priv->key = key;
901 } else {
902 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
903 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
904 status = rsi_hal_load_key(adapter->priv,
905 key->key,
906 key->keylen,
907 RSI_PAIRWISE_KEY,
908 key->keyidx,
909 key->cipher,
910 sta_id,
911 vif);
912 if (status)
913 return status;
914 }
915 }
916
917 status = rsi_hal_load_key(adapter->priv,
918 key->key,
919 key->keylen,
920 key_type,
921 key->keyidx,
922 key->cipher,
923 sta_id,
924 vif);
925 if (status)
926 return status;
927
928 if (vif->type == NL80211_IFTYPE_STATION && key->key &&
929 (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
930 key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
931 if (!rsi_send_block_unblock_frame(adapter->priv, false))
932 adapter->priv->hw_data_qs_blocked = false;
933 }
934
935 return 0;
936 }
937
938 /**
939 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
940 * @hw: Pointer to the ieee80211_hw structure.
941 * @cmd: enum set_key_cmd.
942 * @vif: Pointer to the ieee80211_vif structure.
943 * @sta: Pointer to the ieee80211_sta structure.
944 * @key: Pointer to the ieee80211_key_conf structure.
945 *
946 * Return: status: 0 on success, negative error code on failure.
947 */
rsi_mac80211_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)948 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
949 enum set_key_cmd cmd,
950 struct ieee80211_vif *vif,
951 struct ieee80211_sta *sta,
952 struct ieee80211_key_conf *key)
953 {
954 struct rsi_hw *adapter = hw->priv;
955 struct rsi_common *common = adapter->priv;
956 struct security_info *secinfo = &common->secinfo;
957 int status;
958
959 mutex_lock(&common->mutex);
960 switch (cmd) {
961 case SET_KEY:
962 secinfo->security_enable = true;
963 status = rsi_hal_key_config(hw, vif, key, sta);
964 if (status) {
965 mutex_unlock(&common->mutex);
966 return status;
967 }
968
969 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
970 secinfo->ptk_cipher = key->cipher;
971 else
972 secinfo->gtk_cipher = key->cipher;
973
974 key->hw_key_idx = key->keyidx;
975 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
976
977 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
978 break;
979
980 case DISABLE_KEY:
981 if (vif->type == NL80211_IFTYPE_STATION)
982 secinfo->security_enable = false;
983 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
984 memset(key, 0, sizeof(struct ieee80211_key_conf));
985 status = rsi_hal_key_config(hw, vif, key, sta);
986 break;
987
988 default:
989 status = -EOPNOTSUPP;
990 break;
991 }
992
993 mutex_unlock(&common->mutex);
994 return status;
995 }
996
997 /**
998 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
999 * the corresponding mlme_action flag and
1000 * informs the f/w regarding this.
1001 * @hw: Pointer to the ieee80211_hw structure.
1002 * @vif: Pointer to the ieee80211_vif structure.
1003 * @params: Pointer to A-MPDU action parameters
1004 *
1005 * Return: status: 0 on success, negative error code on failure.
1006 */
rsi_mac80211_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)1007 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1008 struct ieee80211_vif *vif,
1009 struct ieee80211_ampdu_params *params)
1010 {
1011 int status = -EOPNOTSUPP;
1012 struct rsi_hw *adapter = hw->priv;
1013 struct rsi_common *common = adapter->priv;
1014 struct rsi_sta *rsta = NULL;
1015 u16 seq_no = 0, seq_start = 0;
1016 u8 ii = 0;
1017 struct ieee80211_sta *sta = params->sta;
1018 u8 sta_id = 0;
1019 enum ieee80211_ampdu_mlme_action action = params->action;
1020 u16 tid = params->tid;
1021 u16 *ssn = ¶ms->ssn;
1022 u8 buf_size = params->buf_size;
1023
1024 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1025 if (vif == adapter->vifs[ii])
1026 break;
1027 }
1028
1029 mutex_lock(&common->mutex);
1030
1031 if (ssn != NULL)
1032 seq_no = *ssn;
1033
1034 if ((vif->type == NL80211_IFTYPE_AP) ||
1035 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1036 rsta = rsi_find_sta(common, sta->addr);
1037 if (!rsta) {
1038 rsi_dbg(ERR_ZONE, "No station mapped\n");
1039 status = 0;
1040 goto unlock;
1041 }
1042 sta_id = rsta->sta_id;
1043 }
1044
1045 rsi_dbg(INFO_ZONE,
1046 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1047 __func__, tid, seq_no, buf_size, sta_id);
1048
1049 switch (action) {
1050 case IEEE80211_AMPDU_RX_START:
1051 status = rsi_send_aggregation_params_frame(common,
1052 tid,
1053 seq_no,
1054 buf_size,
1055 STA_RX_ADDBA_DONE,
1056 sta_id);
1057 break;
1058
1059 case IEEE80211_AMPDU_RX_STOP:
1060 status = rsi_send_aggregation_params_frame(common,
1061 tid,
1062 0,
1063 buf_size,
1064 STA_RX_DELBA,
1065 sta_id);
1066 break;
1067
1068 case IEEE80211_AMPDU_TX_START:
1069 if ((vif->type == NL80211_IFTYPE_STATION) ||
1070 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1071 common->vif_info[ii].seq_start = seq_no;
1072 else if ((vif->type == NL80211_IFTYPE_AP) ||
1073 (vif->type == NL80211_IFTYPE_P2P_GO))
1074 rsta->seq_start[tid] = seq_no;
1075 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1076 status = 0;
1077 break;
1078
1079 case IEEE80211_AMPDU_TX_STOP_CONT:
1080 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1081 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1082 status = rsi_send_aggregation_params_frame(common,
1083 tid,
1084 seq_no,
1085 buf_size,
1086 STA_TX_DELBA,
1087 sta_id);
1088 if (!status)
1089 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1090 break;
1091
1092 case IEEE80211_AMPDU_TX_OPERATIONAL:
1093 if ((vif->type == NL80211_IFTYPE_STATION) ||
1094 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1095 seq_start = common->vif_info[ii].seq_start;
1096 else if ((vif->type == NL80211_IFTYPE_AP) ||
1097 (vif->type == NL80211_IFTYPE_P2P_GO))
1098 seq_start = rsta->seq_start[tid];
1099 status = rsi_send_aggregation_params_frame(common,
1100 tid,
1101 seq_start,
1102 buf_size,
1103 STA_TX_ADDBA_DONE,
1104 sta_id);
1105 break;
1106
1107 default:
1108 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1109 break;
1110 }
1111
1112 unlock:
1113 mutex_unlock(&common->mutex);
1114 return status;
1115 }
1116
1117 /**
1118 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1119 * @hw: Pointer to the ieee80211_hw structure.
1120 * @value: Rts threshold value.
1121 *
1122 * Return: 0 on success.
1123 */
rsi_mac80211_set_rts_threshold(struct ieee80211_hw * hw,u32 value)1124 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1125 u32 value)
1126 {
1127 struct rsi_hw *adapter = hw->priv;
1128 struct rsi_common *common = adapter->priv;
1129
1130 mutex_lock(&common->mutex);
1131 common->rts_threshold = value;
1132 mutex_unlock(&common->mutex);
1133
1134 return 0;
1135 }
1136
1137 /**
1138 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1139 * @hw: Pointer to the ieee80211_hw structure
1140 * @vif: Pointer to the ieee80211_vif structure.
1141 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1142 *
1143 * Return: 0 on success.
1144 */
rsi_mac80211_set_rate_mask(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct cfg80211_bitrate_mask * mask)1145 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1146 struct ieee80211_vif *vif,
1147 const struct cfg80211_bitrate_mask *mask)
1148 {
1149 struct rsi_hw *adapter = hw->priv;
1150 struct rsi_common *common = adapter->priv;
1151 enum nl80211_band band = hw->conf.chandef.chan->band;
1152
1153 mutex_lock(&common->mutex);
1154 common->fixedrate_mask[band] = 0;
1155
1156 if (mask->control[band].legacy == 0xfff) {
1157 common->fixedrate_mask[band] =
1158 (mask->control[band].ht_mcs[0] << 12);
1159 } else {
1160 common->fixedrate_mask[band] =
1161 mask->control[band].legacy;
1162 }
1163 mutex_unlock(&common->mutex);
1164
1165 return 0;
1166 }
1167
1168 /**
1169 * rsi_perform_cqm() - This function performs cqm.
1170 * @common: Pointer to the driver private structure.
1171 * @bssid: pointer to the bssid.
1172 * @rssi: RSSI value.
1173 */
rsi_perform_cqm(struct rsi_common * common,u8 * bssid,s8 rssi,struct ieee80211_vif * vif)1174 static void rsi_perform_cqm(struct rsi_common *common,
1175 u8 *bssid,
1176 s8 rssi,
1177 struct ieee80211_vif *vif)
1178 {
1179 s8 last_event = common->cqm_info.last_cqm_event_rssi;
1180 int thold = common->cqm_info.rssi_thold;
1181 u32 hyst = common->cqm_info.rssi_hyst;
1182 enum nl80211_cqm_rssi_threshold_event event;
1183
1184 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1185 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1186 else if (rssi > thold &&
1187 (last_event == 0 || rssi > (last_event + hyst)))
1188 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1189 else
1190 return;
1191
1192 common->cqm_info.last_cqm_event_rssi = rssi;
1193 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1194 ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1195
1196 return;
1197 }
1198
1199 /**
1200 * rsi_fill_rx_status() - This function fills rx status in
1201 * ieee80211_rx_status structure.
1202 * @hw: Pointer to the ieee80211_hw structure.
1203 * @skb: Pointer to the socket buffer structure.
1204 * @common: Pointer to the driver private structure.
1205 * @rxs: Pointer to the ieee80211_rx_status structure.
1206 *
1207 * Return: None.
1208 */
rsi_fill_rx_status(struct ieee80211_hw * hw,struct sk_buff * skb,struct rsi_common * common,struct ieee80211_rx_status * rxs)1209 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1210 struct sk_buff *skb,
1211 struct rsi_common *common,
1212 struct ieee80211_rx_status *rxs)
1213 {
1214 struct rsi_hw *adapter = common->priv;
1215 struct ieee80211_vif *vif;
1216 struct ieee80211_bss_conf *bss = NULL;
1217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1218 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1219 struct ieee80211_hdr *hdr;
1220 char rssi = rx_params->rssi;
1221 u8 hdrlen = 0;
1222 u8 channel = rx_params->channel;
1223 s32 freq;
1224 int i;
1225
1226 hdr = ((struct ieee80211_hdr *)(skb->data));
1227 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1228
1229 memset(info, 0, sizeof(struct ieee80211_tx_info));
1230
1231 rxs->signal = -(rssi);
1232
1233 rxs->band = common->band;
1234
1235 freq = ieee80211_channel_to_frequency(channel, rxs->band);
1236
1237 if (freq)
1238 rxs->freq = freq;
1239
1240 if (ieee80211_has_protected(hdr->frame_control)) {
1241 if (rsi_is_cipher_wep(common)) {
1242 memmove(skb->data + 4, skb->data, hdrlen);
1243 skb_pull(skb, 4);
1244 } else {
1245 memmove(skb->data + 8, skb->data, hdrlen);
1246 skb_pull(skb, 8);
1247 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1248 }
1249 rxs->flag |= RX_FLAG_DECRYPTED;
1250 rxs->flag |= RX_FLAG_IV_STRIPPED;
1251 }
1252
1253 for (i = 0; i < RSI_MAX_VIFS; i++) {
1254 vif = adapter->vifs[i];
1255 if (!vif)
1256 continue;
1257 if (vif->type == NL80211_IFTYPE_STATION) {
1258 bss = &vif->bss_conf;
1259 break;
1260 }
1261 }
1262 if (!bss)
1263 return;
1264 /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1265 if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1266 if (ieee80211_is_beacon(hdr->frame_control))
1267 rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1268 }
1269
1270 return;
1271 }
1272
1273 /**
1274 * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
1275 * @common: Pointer to the driver private structure.
1276 * @skb: Pointer to the socket buffer structure.
1277 *
1278 * Return: None.
1279 */
rsi_indicate_pkt_to_os(struct rsi_common * common,struct sk_buff * skb)1280 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1281 struct sk_buff *skb)
1282 {
1283 struct rsi_hw *adapter = common->priv;
1284 struct ieee80211_hw *hw = adapter->hw;
1285 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1286
1287 if ((common->iface_down) || (!adapter->sc_nvifs)) {
1288 dev_kfree_skb(skb);
1289 return;
1290 }
1291
1292 /* filling in the ieee80211_rx_status flags */
1293 rsi_fill_rx_status(hw, skb, common, rx_status);
1294
1295 ieee80211_rx_irqsafe(hw, skb);
1296 }
1297
rsi_set_min_rate(struct ieee80211_hw * hw,struct ieee80211_sta * sta,struct rsi_common * common)1298 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1299 struct ieee80211_sta *sta,
1300 struct rsi_common *common)
1301 {
1302 u8 band = hw->conf.chandef.chan->band;
1303 u8 ii;
1304 u32 rate_bitmap;
1305 bool matched = false;
1306
1307 common->bitrate_mask[band] = sta->supp_rates[band];
1308
1309 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1310
1311 if (rate_bitmap & 0xfff) {
1312 /* Find out the min rate */
1313 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1314 if (rate_bitmap & BIT(ii)) {
1315 common->min_rate = rsi_rates[ii].hw_value;
1316 matched = true;
1317 break;
1318 }
1319 }
1320 }
1321
1322 common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1323
1324 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1325 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1326 if ((rate_bitmap >> 12) & BIT(ii)) {
1327 common->min_rate = rsi_mcsrates[ii];
1328 matched = true;
1329 break;
1330 }
1331 }
1332 }
1333
1334 if (!matched)
1335 common->min_rate = 0xffff;
1336 }
1337
1338 /**
1339 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1340 * connected.
1341 * @hw: pointer to the ieee80211_hw structure.
1342 * @vif: Pointer to the ieee80211_vif structure.
1343 * @sta: Pointer to the ieee80211_sta structure.
1344 *
1345 * Return: 0 on success, negative error codes on failure.
1346 */
rsi_mac80211_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1347 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1348 struct ieee80211_vif *vif,
1349 struct ieee80211_sta *sta)
1350 {
1351 struct rsi_hw *adapter = hw->priv;
1352 struct rsi_common *common = adapter->priv;
1353 bool sta_exist = false;
1354 struct rsi_sta *rsta;
1355 int status = 0;
1356
1357 rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1358
1359 mutex_lock(&common->mutex);
1360
1361 if ((vif->type == NL80211_IFTYPE_AP) ||
1362 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1363 u8 cnt;
1364 int sta_idx = -1;
1365 int free_index = -1;
1366
1367 /* Check if max stations reached */
1368 if (common->num_stations >= common->max_stations) {
1369 rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1370 status = -EOPNOTSUPP;
1371 goto unlock;
1372 }
1373 for (cnt = 0; cnt < common->max_stations; cnt++) {
1374 rsta = &common->stations[cnt];
1375
1376 if (!rsta->sta) {
1377 if (free_index < 0)
1378 free_index = cnt;
1379 continue;
1380 }
1381 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1382 rsi_dbg(INFO_ZONE, "Station exists\n");
1383 sta_idx = cnt;
1384 sta_exist = true;
1385 break;
1386 }
1387 }
1388 if (!sta_exist) {
1389 if (free_index >= 0)
1390 sta_idx = free_index;
1391 }
1392 if (sta_idx < 0) {
1393 rsi_dbg(ERR_ZONE,
1394 "%s: Some problem reaching here...\n",
1395 __func__);
1396 status = -EINVAL;
1397 goto unlock;
1398 }
1399 rsta = &common->stations[sta_idx];
1400 rsta->sta = sta;
1401 rsta->sta_id = sta_idx;
1402 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1403 rsta->start_tx_aggr[cnt] = false;
1404 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1405 rsta->seq_start[cnt] = 0;
1406 if (!sta_exist) {
1407 rsi_dbg(INFO_ZONE, "New Station\n");
1408
1409 /* Send peer notify to device */
1410 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1411 rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1412 sta->addr, sta->wme, sta->aid,
1413 sta, sta_idx, 0, vif);
1414
1415 if (common->key) {
1416 struct ieee80211_key_conf *key = common->key;
1417
1418 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1419 (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1420 rsi_hal_load_key(adapter->priv,
1421 key->key,
1422 key->keylen,
1423 RSI_PAIRWISE_KEY,
1424 key->keyidx,
1425 key->cipher,
1426 sta_idx,
1427 vif);
1428 }
1429
1430 common->num_stations++;
1431 }
1432 }
1433
1434 if ((vif->type == NL80211_IFTYPE_STATION) ||
1435 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1436 rsi_set_min_rate(hw, sta, common);
1437 if (sta->ht_cap.ht_supported) {
1438 common->vif_info[0].is_ht = true;
1439 common->bitrate_mask[NL80211_BAND_2GHZ] =
1440 sta->supp_rates[NL80211_BAND_2GHZ];
1441 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1442 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1443 common->vif_info[0].sgi = true;
1444 ieee80211_start_tx_ba_session(sta, 0, 0);
1445 }
1446 }
1447
1448 unlock:
1449 mutex_unlock(&common->mutex);
1450
1451 return status;
1452 }
1453
1454 /**
1455 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1456 * getting disconnected.
1457 * @hw: Pointer to the ieee80211_hw structure.
1458 * @vif: Pointer to the ieee80211_vif structure.
1459 * @sta: Pointer to the ieee80211_sta structure.
1460 *
1461 * Return: 0 on success, negative error codes on failure.
1462 */
rsi_mac80211_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1463 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1464 struct ieee80211_vif *vif,
1465 struct ieee80211_sta *sta)
1466 {
1467 struct rsi_hw *adapter = hw->priv;
1468 struct rsi_common *common = adapter->priv;
1469 struct ieee80211_bss_conf *bss = &vif->bss_conf;
1470 struct rsi_sta *rsta;
1471
1472 rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1473
1474 mutex_lock(&common->mutex);
1475
1476 if ((vif->type == NL80211_IFTYPE_AP) ||
1477 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1478 u8 sta_idx, cnt;
1479
1480 /* Send peer notify to device */
1481 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1482 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1483 rsta = &common->stations[sta_idx];
1484
1485 if (!rsta->sta)
1486 continue;
1487 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1488 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1489 sta->addr, sta->wme,
1490 sta->aid, sta, sta_idx,
1491 0, vif);
1492 rsta->sta = NULL;
1493 rsta->sta_id = -1;
1494 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1495 rsta->start_tx_aggr[cnt] = false;
1496 if (common->num_stations > 0)
1497 common->num_stations--;
1498 break;
1499 }
1500 }
1501 if (sta_idx >= common->max_stations)
1502 rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1503 }
1504
1505 if ((vif->type == NL80211_IFTYPE_STATION) ||
1506 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1507 /* Resetting all the fields to default values */
1508 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1509 bss->qos = sta->wme;
1510 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1511 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1512 common->min_rate = 0xffff;
1513 common->vif_info[0].is_ht = false;
1514 common->vif_info[0].sgi = false;
1515 common->vif_info[0].seq_start = 0;
1516 common->secinfo.ptk_cipher = 0;
1517 common->secinfo.gtk_cipher = 0;
1518 if (!common->iface_down)
1519 rsi_send_rx_filter_frame(common, 0);
1520 }
1521 mutex_unlock(&common->mutex);
1522
1523 return 0;
1524 }
1525
1526 /**
1527 * rsi_mac80211_set_antenna() - This function is used to configure
1528 * tx and rx antennas.
1529 * @hw: Pointer to the ieee80211_hw structure.
1530 * @tx_ant: Bitmap for tx antenna
1531 * @rx_ant: Bitmap for rx antenna
1532 *
1533 * Return: 0 on success, Negative error code on failure.
1534 */
rsi_mac80211_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)1535 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1536 u32 tx_ant, u32 rx_ant)
1537 {
1538 struct rsi_hw *adapter = hw->priv;
1539 struct rsi_common *common = adapter->priv;
1540 u8 antenna = 0;
1541
1542 if (tx_ant > 1 || rx_ant > 1) {
1543 rsi_dbg(ERR_ZONE,
1544 "Invalid antenna selection (tx: %d, rx:%d)\n",
1545 tx_ant, rx_ant);
1546 rsi_dbg(ERR_ZONE,
1547 "Use 0 for int_ant, 1 for ext_ant\n");
1548 return -EINVAL;
1549 }
1550
1551 rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1552 __func__, tx_ant, rx_ant);
1553
1554 mutex_lock(&common->mutex);
1555
1556 antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1557 if (common->ant_in_use != antenna)
1558 if (rsi_set_antenna(common, antenna))
1559 goto fail_set_antenna;
1560
1561 rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1562 tx_ant ? "UFL" : "INT");
1563
1564 common->ant_in_use = antenna;
1565
1566 mutex_unlock(&common->mutex);
1567
1568 return 0;
1569
1570 fail_set_antenna:
1571 rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1572 mutex_unlock(&common->mutex);
1573 return -EINVAL;
1574 }
1575
1576 /**
1577 * rsi_mac80211_get_antenna() - This function is used to configure
1578 * tx and rx antennas.
1579 *
1580 * @hw: Pointer to the ieee80211_hw structure.
1581 * @tx_ant: Bitmap for tx antenna
1582 * @rx_ant: Bitmap for rx antenna
1583 *
1584 * Return: 0 on success, negative error codes on failure.
1585 */
rsi_mac80211_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)1586 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1587 u32 *tx_ant, u32 *rx_ant)
1588 {
1589 struct rsi_hw *adapter = hw->priv;
1590 struct rsi_common *common = adapter->priv;
1591
1592 mutex_lock(&common->mutex);
1593
1594 *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1595 *rx_ant = 0;
1596
1597 mutex_unlock(&common->mutex);
1598
1599 return 0;
1600 }
1601
rsi_map_region_code(enum nl80211_dfs_regions region_code)1602 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1603 {
1604 switch (region_code) {
1605 case NL80211_DFS_FCC:
1606 return RSI_REGION_FCC;
1607 case NL80211_DFS_ETSI:
1608 return RSI_REGION_ETSI;
1609 case NL80211_DFS_JP:
1610 return RSI_REGION_TELEC;
1611 case NL80211_DFS_UNSET:
1612 return RSI_REGION_WORLD;
1613 }
1614 return RSI_REGION_WORLD;
1615 }
1616
rsi_reg_notify(struct wiphy * wiphy,struct regulatory_request * request)1617 static void rsi_reg_notify(struct wiphy *wiphy,
1618 struct regulatory_request *request)
1619 {
1620 struct ieee80211_supported_band *sband;
1621 struct ieee80211_channel *ch;
1622 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1623 struct rsi_hw * adapter = hw->priv;
1624 struct rsi_common *common = adapter->priv;
1625 int i;
1626
1627 mutex_lock(&common->mutex);
1628
1629 rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1630 request->alpha2, request->dfs_region);
1631
1632 if (common->num_supp_bands > 1) {
1633 sband = wiphy->bands[NL80211_BAND_5GHZ];
1634
1635 for (i = 0; i < sband->n_channels; i++) {
1636 ch = &sband->channels[i];
1637 if (ch->flags & IEEE80211_CHAN_DISABLED)
1638 continue;
1639
1640 if (ch->flags & IEEE80211_CHAN_RADAR)
1641 ch->flags |= IEEE80211_CHAN_NO_IR;
1642 }
1643 }
1644 adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1645 rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1646
1647 adapter->country[0] = request->alpha2[0];
1648 adapter->country[1] = request->alpha2[1];
1649
1650 mutex_unlock(&common->mutex);
1651 }
1652
rsi_mac80211_rfkill_poll(struct ieee80211_hw * hw)1653 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1654 {
1655 struct rsi_hw *adapter = hw->priv;
1656 struct rsi_common *common = adapter->priv;
1657
1658 mutex_lock(&common->mutex);
1659 if (common->fsm_state != FSM_MAC_INIT_DONE)
1660 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1661 else
1662 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1663 mutex_unlock(&common->mutex);
1664 }
1665
rsi_resume_conn_channel(struct rsi_common * common)1666 static void rsi_resume_conn_channel(struct rsi_common *common)
1667 {
1668 struct rsi_hw *adapter = common->priv;
1669 struct ieee80211_vif *vif;
1670 int cnt;
1671
1672 for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1673 vif = adapter->vifs[cnt];
1674 if (!vif)
1675 continue;
1676
1677 if ((vif->type == NL80211_IFTYPE_AP) ||
1678 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1679 rsi_switch_channel(adapter, vif);
1680 break;
1681 }
1682 if (((vif->type == NL80211_IFTYPE_STATION) ||
1683 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1684 vif->bss_conf.assoc) {
1685 rsi_switch_channel(adapter, vif);
1686 break;
1687 }
1688 }
1689 }
1690
rsi_roc_timeout(struct timer_list * t)1691 void rsi_roc_timeout(struct timer_list *t)
1692 {
1693 struct rsi_common *common = from_timer(common, t, roc_timer);
1694
1695 rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1696
1697 mutex_lock(&common->mutex);
1698 ieee80211_remain_on_channel_expired(common->priv->hw);
1699
1700 if (timer_pending(&common->roc_timer))
1701 del_timer(&common->roc_timer);
1702
1703 rsi_resume_conn_channel(common);
1704 mutex_unlock(&common->mutex);
1705 }
1706
rsi_mac80211_roc(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel * chan,int duration,enum ieee80211_roc_type type)1707 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1708 struct ieee80211_channel *chan, int duration,
1709 enum ieee80211_roc_type type)
1710 {
1711 struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
1712 struct rsi_common *common = (struct rsi_common *)adapter->priv;
1713 int status = 0;
1714
1715 rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1716
1717 mutex_lock(&common->mutex);
1718 rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1719 __func__, chan->hw_value, duration);
1720
1721 if (timer_pending(&common->roc_timer)) {
1722 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1723 del_timer(&common->roc_timer);
1724 }
1725 common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1726 add_timer(&common->roc_timer);
1727
1728 /* Configure band */
1729 if (rsi_band_check(common, chan)) {
1730 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1731 status = -EINVAL;
1732 goto out;
1733 }
1734
1735 /* Configure channel */
1736 if (rsi_set_channel(common, chan)) {
1737 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1738 status = -EINVAL;
1739 goto out;
1740 }
1741
1742 common->roc_vif = vif;
1743 ieee80211_ready_on_channel(hw);
1744 rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1745 __func__, chan->hw_value);
1746
1747 out:
1748 mutex_unlock(&common->mutex);
1749
1750 return status;
1751 }
1752
rsi_mac80211_cancel_roc(struct ieee80211_hw * hw)1753 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw)
1754 {
1755 struct rsi_hw *adapter = hw->priv;
1756 struct rsi_common *common = adapter->priv;
1757
1758 rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1759
1760 mutex_lock(&common->mutex);
1761 if (!timer_pending(&common->roc_timer)) {
1762 mutex_unlock(&common->mutex);
1763 return 0;
1764 }
1765
1766 del_timer(&common->roc_timer);
1767
1768 rsi_resume_conn_channel(common);
1769 mutex_unlock(&common->mutex);
1770
1771 return 0;
1772 }
1773
1774 #ifdef CONFIG_PM
1775 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1776 .flags = WIPHY_WOWLAN_ANY |
1777 WIPHY_WOWLAN_MAGIC_PKT |
1778 WIPHY_WOWLAN_DISCONNECT |
1779 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
1780 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1781 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
1782 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1783 };
1784
rsi_wow_map_triggers(struct rsi_common * common,struct cfg80211_wowlan * wowlan)1785 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1786 struct cfg80211_wowlan *wowlan)
1787 {
1788 u16 wow_triggers = 0;
1789
1790 rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1791
1792 if (wowlan->any)
1793 wow_triggers |= RSI_WOW_ANY;
1794 if (wowlan->magic_pkt)
1795 wow_triggers |= RSI_WOW_MAGIC_PKT;
1796 if (wowlan->disconnect)
1797 wow_triggers |= RSI_WOW_DISCONNECT;
1798 if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1799 wowlan->four_way_handshake)
1800 wow_triggers |= RSI_WOW_GTK_REKEY;
1801
1802 return wow_triggers;
1803 }
1804
rsi_config_wowlan(struct rsi_hw * adapter,struct cfg80211_wowlan * wowlan)1805 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1806 {
1807 struct rsi_common *common = adapter->priv;
1808 u16 triggers = 0;
1809 u16 rx_filter_word = 0;
1810 struct ieee80211_bss_conf *bss = NULL;
1811
1812 rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1813
1814 if (!adapter->vifs[0])
1815 return -EINVAL;
1816
1817 bss = &adapter->vifs[0]->bss_conf;
1818
1819 if (WARN_ON(!wowlan)) {
1820 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1821 return -EINVAL;
1822 }
1823
1824 common->wow_flags |= RSI_WOW_ENABLED;
1825 triggers = rsi_wow_map_triggers(common, wowlan);
1826 if (!triggers) {
1827 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1828 return -EINVAL;
1829 }
1830 if (!bss->assoc) {
1831 rsi_dbg(ERR_ZONE,
1832 "Cannot configure WoWLAN (Station not connected)\n");
1833 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1834 return 0;
1835 }
1836 rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1837 rsi_send_wowlan_request(common, triggers, 1);
1838
1839 /**
1840 * Increase the beacon_miss threshold & keep-alive timers in
1841 * vap_update frame
1842 */
1843 rsi_send_vap_dynamic_update(common);
1844
1845 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1846 rsi_send_rx_filter_frame(common, rx_filter_word);
1847
1848 return 0;
1849 }
1850 EXPORT_SYMBOL(rsi_config_wowlan);
1851
rsi_mac80211_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)1852 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1853 struct cfg80211_wowlan *wowlan)
1854 {
1855 struct rsi_hw *adapter = hw->priv;
1856 struct rsi_common *common = adapter->priv;
1857
1858 rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1859 mutex_lock(&common->mutex);
1860 if (rsi_config_wowlan(adapter, wowlan)) {
1861 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1862 mutex_unlock(&common->mutex);
1863 return 1;
1864 }
1865 mutex_unlock(&common->mutex);
1866
1867 return 0;
1868 }
1869
rsi_mac80211_resume(struct ieee80211_hw * hw)1870 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1871 {
1872 u16 rx_filter_word = 0;
1873 struct rsi_hw *adapter = hw->priv;
1874 struct rsi_common *common = adapter->priv;
1875
1876 common->wow_flags = 0;
1877
1878 rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1879
1880 if (common->hibernate_resume)
1881 return 0;
1882
1883 mutex_lock(&common->mutex);
1884 rsi_send_wowlan_request(common, 0, 0);
1885
1886 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1887 ALLOW_MGMT_ASSOC_PEER);
1888 rsi_send_rx_filter_frame(common, rx_filter_word);
1889 mutex_unlock(&common->mutex);
1890
1891 return 0;
1892 }
1893
1894 #endif
1895
1896 static const struct ieee80211_ops mac80211_ops = {
1897 .tx = rsi_mac80211_tx,
1898 .start = rsi_mac80211_start,
1899 .stop = rsi_mac80211_stop,
1900 .add_interface = rsi_mac80211_add_interface,
1901 .remove_interface = rsi_mac80211_remove_interface,
1902 .config = rsi_mac80211_config,
1903 .bss_info_changed = rsi_mac80211_bss_info_changed,
1904 .conf_tx = rsi_mac80211_conf_tx,
1905 .configure_filter = rsi_mac80211_conf_filter,
1906 .set_key = rsi_mac80211_set_key,
1907 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1908 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
1909 .ampdu_action = rsi_mac80211_ampdu_action,
1910 .sta_add = rsi_mac80211_sta_add,
1911 .sta_remove = rsi_mac80211_sta_remove,
1912 .set_antenna = rsi_mac80211_set_antenna,
1913 .get_antenna = rsi_mac80211_get_antenna,
1914 .rfkill_poll = rsi_mac80211_rfkill_poll,
1915 .remain_on_channel = rsi_mac80211_roc,
1916 .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1917 #ifdef CONFIG_PM
1918 .suspend = rsi_mac80211_suspend,
1919 .resume = rsi_mac80211_resume,
1920 #endif
1921 };
1922
1923 /**
1924 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1925 * @common: Pointer to the driver private structure.
1926 *
1927 * Return: 0 on success, negative error codes on failure.
1928 */
rsi_mac80211_attach(struct rsi_common * common)1929 int rsi_mac80211_attach(struct rsi_common *common)
1930 {
1931 int status = 0;
1932 struct ieee80211_hw *hw = NULL;
1933 struct wiphy *wiphy = NULL;
1934 struct rsi_hw *adapter = common->priv;
1935 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
1936
1937 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
1938
1939 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
1940 if (!hw) {
1941 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
1942 return -ENOMEM;
1943 }
1944
1945 wiphy = hw->wiphy;
1946
1947 SET_IEEE80211_DEV(hw, adapter->device);
1948
1949 hw->priv = adapter;
1950 adapter->hw = hw;
1951
1952 ieee80211_hw_set(hw, SIGNAL_DBM);
1953 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1954 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1955 ieee80211_hw_set(hw, SUPPORTS_PS);
1956 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
1957
1958 hw->queues = MAX_HW_QUEUES;
1959 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
1960
1961 hw->max_rates = 1;
1962 hw->max_rate_tries = MAX_RETRIES;
1963 hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
1964 hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
1965
1966 hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
1967 hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
1968 hw->rate_control_algorithm = "AARF";
1969
1970 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
1971 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
1972
1973 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1974 BIT(NL80211_IFTYPE_AP) |
1975 BIT(NL80211_IFTYPE_P2P_DEVICE) |
1976 BIT(NL80211_IFTYPE_P2P_CLIENT) |
1977 BIT(NL80211_IFTYPE_P2P_GO);
1978
1979 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1980 wiphy->retry_short = RETRY_SHORT;
1981 wiphy->retry_long = RETRY_LONG;
1982 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1983 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1984 wiphy->flags = 0;
1985
1986 wiphy->available_antennas_rx = 1;
1987 wiphy->available_antennas_tx = 1;
1988
1989 status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
1990 if (status)
1991 return status;
1992 wiphy->bands[NL80211_BAND_2GHZ] =
1993 &adapter->sbands[NL80211_BAND_2GHZ];
1994 if (common->num_supp_bands > 1) {
1995 status = rsi_register_rates_channels(adapter,
1996 NL80211_BAND_5GHZ);
1997 if (status)
1998 return status;
1999 wiphy->bands[NL80211_BAND_5GHZ] =
2000 &adapter->sbands[NL80211_BAND_5GHZ];
2001 }
2002
2003 /* AP Parameters */
2004 wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2005 common->max_stations = wiphy->max_ap_assoc_sta;
2006 rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2007 hw->sta_data_size = sizeof(struct rsi_sta);
2008 wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2009 wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2010 wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2011 wiphy->reg_notifier = rsi_reg_notify;
2012
2013 #ifdef CONFIG_PM
2014 wiphy->wowlan = &rsi_wowlan_support;
2015 #endif
2016
2017 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2018
2019 /* Wi-Fi direct parameters */
2020 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2021 wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2022 wiphy->max_remain_on_channel_duration = 10000;
2023 hw->max_listen_interval = 10;
2024 wiphy->iface_combinations = rsi_iface_combinations;
2025 wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2026
2027 if (common->coex_mode > 1)
2028 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2029
2030 status = ieee80211_register_hw(hw);
2031 if (status)
2032 return status;
2033
2034 return rsi_init_dbgfs(adapter);
2035 }
2036