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
rsi_mac80211_hw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)233 static int rsi_mac80211_hw_scan_start(struct ieee80211_hw *hw,
234 struct ieee80211_vif *vif,
235 struct ieee80211_scan_request *hw_req)
236 {
237 struct cfg80211_scan_request *scan_req = &hw_req->req;
238 struct rsi_hw *adapter = hw->priv;
239 struct rsi_common *common = adapter->priv;
240
241 rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
242 common->mac_ops_resumed = false;
243
244 if (common->fsm_state != FSM_MAC_INIT_DONE)
245 return -ENODEV;
246
247 if ((common->wow_flags & RSI_WOW_ENABLED) ||
248 scan_req->n_channels == 0)
249 return -EINVAL;
250
251 /* Scan already in progress. So return */
252 if (common->bgscan_en)
253 return -EBUSY;
254
255 /* If STA is not connected, return with special value 1, in order
256 * to start sw_scan in mac80211
257 */
258 if (!vif->cfg.assoc)
259 return 1;
260
261 mutex_lock(&common->mutex);
262 common->hwscan = scan_req;
263 if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
264 if (!rsi_send_bgscan_probe_req(common, vif)) {
265 rsi_dbg(INFO_ZONE, "Background scan started...\n");
266 common->bgscan_en = true;
267 }
268 }
269 mutex_unlock(&common->mutex);
270
271 return 0;
272 }
273
rsi_mac80211_cancel_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif)274 static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
275 struct ieee80211_vif *vif)
276 {
277 struct rsi_hw *adapter = hw->priv;
278 struct rsi_common *common = adapter->priv;
279 struct cfg80211_scan_info info;
280
281 rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
282 mutex_lock(&common->mutex);
283
284 if (common->bgscan_en) {
285 if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
286 common->bgscan_en = false;
287 info.aborted = false;
288 ieee80211_scan_completed(adapter->hw, &info);
289 rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
290 }
291 common->hwscan = NULL;
292 mutex_unlock(&common->mutex);
293 }
294
295 /**
296 * rsi_mac80211_detach() - This function is used to de-initialize the
297 * Mac80211 stack.
298 * @adapter: Pointer to the adapter structure.
299 *
300 * Return: None.
301 */
rsi_mac80211_detach(struct rsi_hw * adapter)302 void rsi_mac80211_detach(struct rsi_hw *adapter)
303 {
304 struct ieee80211_hw *hw = adapter->hw;
305 enum nl80211_band band;
306
307 if (hw) {
308 ieee80211_stop_queues(hw);
309 ieee80211_unregister_hw(hw);
310 ieee80211_free_hw(hw);
311 adapter->hw = NULL;
312 }
313
314 for (band = 0; band < NUM_NL80211_BANDS; band++) {
315 struct ieee80211_supported_band *sband =
316 &adapter->sbands[band];
317
318 kfree(sband->channels);
319 }
320
321 #ifdef CONFIG_RSI_DEBUGFS
322 rsi_remove_dbgfs(adapter);
323 kfree(adapter->dfsentry);
324 #endif
325 }
326 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
327
328 /**
329 * rsi_mac80211_rfkill_exit() - This function is used to stop rfkill polling
330 * when the device is removed.
331 * @adapter: Pointer to the adapter structure.
332 *
333 * Return: None.
334 */
rsi_mac80211_rfkill_exit(struct rsi_hw * adapter)335 void rsi_mac80211_rfkill_exit(struct rsi_hw *adapter)
336 {
337 struct ieee80211_hw *hw = adapter->hw;
338
339 if (hw)
340 wiphy_rfkill_stop_polling(hw->wiphy);
341 }
342 EXPORT_SYMBOL_GPL(rsi_mac80211_rfkill_exit);
343
344 /**
345 * rsi_indicate_tx_status() - This function indicates the transmit status.
346 * @adapter: Pointer to the adapter structure.
347 * @skb: Pointer to the socket buffer structure.
348 * @status: Status
349 *
350 * Return: None.
351 */
rsi_indicate_tx_status(struct rsi_hw * adapter,struct sk_buff * skb,int status)352 void rsi_indicate_tx_status(struct rsi_hw *adapter,
353 struct sk_buff *skb,
354 int status)
355 {
356 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
357 struct skb_info *tx_params;
358
359 if (!adapter->hw) {
360 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
361 return;
362 }
363
364 if (!status)
365 info->flags |= IEEE80211_TX_STAT_ACK;
366
367 tx_params = (struct skb_info *)info->driver_data;
368 skb_pull(skb, tx_params->internal_hdr_size);
369 memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
370
371 ieee80211_tx_status_irqsafe(adapter->hw, skb);
372 }
373
374 /**
375 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
376 * transmitted frame.SKB contains the buffer starting
377 * from the IEEE 802.11 header.
378 * @hw: Pointer to the ieee80211_hw structure.
379 * @control: Pointer to the ieee80211_tx_control structure
380 * @skb: Pointer to the socket buffer structure.
381 *
382 * Return: None
383 */
rsi_mac80211_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)384 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
385 struct ieee80211_tx_control *control,
386 struct sk_buff *skb)
387 {
388 struct rsi_hw *adapter = hw->priv;
389 struct rsi_common *common = adapter->priv;
390 struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
391
392 if (ieee80211_is_auth(wlh->frame_control))
393 common->mac_ops_resumed = false;
394
395 rsi_core_xmit(common, skb);
396 }
397
398 /**
399 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
400 * the driver init is complete by then, just
401 * returns success.
402 * @hw: Pointer to the ieee80211_hw structure.
403 *
404 * Return: 0 as success.
405 */
rsi_mac80211_start(struct ieee80211_hw * hw)406 static int rsi_mac80211_start(struct ieee80211_hw *hw)
407 {
408 struct rsi_hw *adapter = hw->priv;
409 struct rsi_common *common = adapter->priv;
410
411 rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
412 mutex_lock(&common->mutex);
413 if (common->hibernate_resume) {
414 common->reinit_hw = true;
415 adapter->host_intf_ops->reinit_device(adapter);
416 wait_for_completion(&adapter->priv->wlan_init_completion);
417 }
418 common->iface_down = false;
419 wiphy_rfkill_start_polling(hw->wiphy);
420 rsi_send_rx_filter_frame(common, 0);
421 mutex_unlock(&common->mutex);
422
423 return 0;
424 }
425
426 /**
427 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
428 * @hw: Pointer to the ieee80211_hw structure.
429 * @suspend: true if the this was called from suspend flow.
430 *
431 * Return: None.
432 */
rsi_mac80211_stop(struct ieee80211_hw * hw,bool suspend)433 static void rsi_mac80211_stop(struct ieee80211_hw *hw, bool suspend)
434 {
435 struct rsi_hw *adapter = hw->priv;
436 struct rsi_common *common = adapter->priv;
437
438 rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
439 mutex_lock(&common->mutex);
440 common->iface_down = true;
441
442 /* Block all rx frames */
443 rsi_send_rx_filter_frame(common, 0xffff);
444
445 mutex_unlock(&common->mutex);
446 }
447
rsi_map_intf_mode(enum nl80211_iftype vif_type)448 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
449 {
450 switch (vif_type) {
451 case NL80211_IFTYPE_STATION:
452 return RSI_OPMODE_STA;
453 case NL80211_IFTYPE_AP:
454 return RSI_OPMODE_AP;
455 case NL80211_IFTYPE_P2P_DEVICE:
456 return RSI_OPMODE_P2P_CLIENT;
457 case NL80211_IFTYPE_P2P_CLIENT:
458 return RSI_OPMODE_P2P_CLIENT;
459 case NL80211_IFTYPE_P2P_GO:
460 return RSI_OPMODE_P2P_GO;
461 default:
462 return RSI_OPMODE_UNSUPPORTED;
463 }
464 }
465
466 /**
467 * rsi_mac80211_add_interface() - This function is called when a netdevice
468 * attached to the hardware is enabled.
469 * @hw: Pointer to the ieee80211_hw structure.
470 * @vif: Pointer to the ieee80211_vif structure.
471 *
472 * Return: ret: 0 on success, negative error code on failure.
473 */
rsi_mac80211_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)474 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
475 struct ieee80211_vif *vif)
476 {
477 struct rsi_hw *adapter = hw->priv;
478 struct rsi_common *common = adapter->priv;
479 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
480 enum opmode intf_mode;
481 enum vap_status vap_status;
482 int vap_idx = -1, i;
483
484 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
485 mutex_lock(&common->mutex);
486
487 intf_mode = rsi_map_intf_mode(vif->type);
488 if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
489 rsi_dbg(ERR_ZONE,
490 "%s: Interface type %d not supported\n", __func__,
491 vif->type);
492 mutex_unlock(&common->mutex);
493 return -EOPNOTSUPP;
494 }
495 if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
496 (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
497 (vif->type == NL80211_IFTYPE_P2P_GO))
498 common->p2p_enabled = true;
499
500 /* Get free vap index */
501 for (i = 0; i < RSI_MAX_VIFS; i++) {
502 if (!adapter->vifs[i] ||
503 !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
504 vap_idx = i;
505 break;
506 }
507 }
508 if (vap_idx < 0) {
509 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
510 mutex_unlock(&common->mutex);
511 return -EOPNOTSUPP;
512 }
513 vif_info->vap_id = vap_idx;
514 adapter->vifs[vap_idx] = vif;
515 adapter->sc_nvifs++;
516 vap_status = VAP_ADD;
517
518 if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
519 vif_info->vap_id, vap_status)) {
520 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
521 mutex_unlock(&common->mutex);
522 return -EINVAL;
523 }
524
525 if ((vif->type == NL80211_IFTYPE_AP) ||
526 (vif->type == NL80211_IFTYPE_P2P_GO)) {
527 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
528 for (i = 0; i < common->max_stations; i++)
529 common->stations[i].sta = NULL;
530 }
531
532 mutex_unlock(&common->mutex);
533
534 return 0;
535 }
536
537 /**
538 * rsi_mac80211_remove_interface() - This function notifies driver that an
539 * interface is going down.
540 * @hw: Pointer to the ieee80211_hw structure.
541 * @vif: Pointer to the ieee80211_vif structure.
542 *
543 * Return: None.
544 */
rsi_mac80211_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)545 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
546 struct ieee80211_vif *vif)
547 {
548 struct rsi_hw *adapter = hw->priv;
549 struct rsi_common *common = adapter->priv;
550 enum opmode opmode;
551 int i;
552
553 rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
554
555 mutex_lock(&common->mutex);
556
557 if (adapter->sc_nvifs <= 0) {
558 mutex_unlock(&common->mutex);
559 return;
560 }
561
562 opmode = rsi_map_intf_mode(vif->type);
563 if (opmode == RSI_OPMODE_UNSUPPORTED) {
564 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
565 mutex_unlock(&common->mutex);
566 return;
567 }
568 for (i = 0; i < RSI_MAX_VIFS; i++) {
569 if (!adapter->vifs[i])
570 continue;
571 if (vif == adapter->vifs[i]) {
572 rsi_set_vap_capabilities(common, opmode, vif->addr,
573 i, VAP_DELETE);
574 adapter->sc_nvifs--;
575 adapter->vifs[i] = NULL;
576 }
577 }
578 mutex_unlock(&common->mutex);
579 }
580
581 /**
582 * rsi_channel_change() - This function is a performs the checks
583 * required for changing a channel and sets
584 * the channel accordingly.
585 * @hw: Pointer to the ieee80211_hw structure.
586 *
587 * Return: 0 on success, negative error code on failure.
588 */
rsi_channel_change(struct ieee80211_hw * hw)589 static int rsi_channel_change(struct ieee80211_hw *hw)
590 {
591 struct rsi_hw *adapter = hw->priv;
592 struct rsi_common *common = adapter->priv;
593 int status = -EOPNOTSUPP;
594 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
595 u16 channel = curchan->hw_value;
596 struct ieee80211_vif *vif;
597 bool assoc = false;
598 int i;
599
600 rsi_dbg(INFO_ZONE,
601 "%s: Set channel: %d MHz type: %d channel_no %d\n",
602 __func__, curchan->center_freq,
603 curchan->flags, channel);
604
605 for (i = 0; i < RSI_MAX_VIFS; i++) {
606 vif = adapter->vifs[i];
607 if (!vif)
608 continue;
609 if (vif->type == NL80211_IFTYPE_STATION) {
610 if (vif->cfg.assoc) {
611 assoc = true;
612 break;
613 }
614 }
615 }
616 if (assoc) {
617 if (!common->hw_data_qs_blocked &&
618 (rsi_get_connected_channel(vif) != channel)) {
619 rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
620 if (!rsi_send_block_unblock_frame(common, true))
621 common->hw_data_qs_blocked = true;
622 }
623 }
624
625 status = rsi_band_check(common, curchan);
626 if (!status)
627 status = rsi_set_channel(adapter->priv, curchan);
628
629 if (assoc) {
630 if (common->hw_data_qs_blocked &&
631 (rsi_get_connected_channel(vif) == channel)) {
632 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
633 if (!rsi_send_block_unblock_frame(common, false))
634 common->hw_data_qs_blocked = false;
635 }
636 }
637
638 return status;
639 }
640
641 /**
642 * rsi_config_power() - This function configures tx power to device
643 * @hw: Pointer to the ieee80211_hw structure.
644 *
645 * Return: 0 on success, negative error code on failure.
646 */
rsi_config_power(struct ieee80211_hw * hw)647 static int rsi_config_power(struct ieee80211_hw *hw)
648 {
649 struct rsi_hw *adapter = hw->priv;
650 struct rsi_common *common = adapter->priv;
651 struct ieee80211_conf *conf = &hw->conf;
652
653 if (adapter->sc_nvifs <= 0) {
654 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
655 return -EINVAL;
656 }
657
658 rsi_dbg(INFO_ZONE,
659 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
660
661 if (conf->power_level == common->tx_power)
662 return 0;
663
664 common->tx_power = conf->power_level;
665
666 return rsi_send_radio_params_update(common);
667 }
668
669 /**
670 * rsi_mac80211_config() - This function is a handler for configuration
671 * requests. The stack calls this function to
672 * change hardware configuration, e.g., channel.
673 * @hw: Pointer to the ieee80211_hw structure.
674 * @radio_idx: Radio index.
675 * @changed: Changed flags set.
676 *
677 * Return: 0 on success, negative error code on failure.
678 */
rsi_mac80211_config(struct ieee80211_hw * hw,int radio_idx,u32 changed)679 static int rsi_mac80211_config(struct ieee80211_hw *hw,
680 int radio_idx,
681 u32 changed)
682 {
683 struct rsi_hw *adapter = hw->priv;
684 struct rsi_common *common = adapter->priv;
685 struct ieee80211_conf *conf = &hw->conf;
686 int status = 0;
687
688 mutex_lock(&common->mutex);
689
690 if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
691 status = rsi_channel_change(hw);
692
693 /* tx power */
694 if (changed & IEEE80211_CONF_CHANGE_POWER) {
695 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
696 status = rsi_config_power(hw);
697 }
698
699 /* Power save parameters */
700 if ((changed & IEEE80211_CONF_CHANGE_PS) &&
701 !common->mac_ops_resumed) {
702 struct ieee80211_vif *vif, *sta_vif = NULL;
703 unsigned long flags;
704 int i, set_ps = 1;
705
706 for (i = 0; i < RSI_MAX_VIFS; i++) {
707 vif = adapter->vifs[i];
708 if (!vif)
709 continue;
710 /* Don't go to power save if AP vap exists */
711 if ((vif->type == NL80211_IFTYPE_AP) ||
712 (vif->type == NL80211_IFTYPE_P2P_GO)) {
713 set_ps = 0;
714 break;
715 }
716 if ((vif->type == NL80211_IFTYPE_STATION ||
717 vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
718 (!sta_vif || vif->cfg.assoc))
719 sta_vif = vif;
720 }
721 if (set_ps && sta_vif) {
722 spin_lock_irqsave(&adapter->ps_lock, flags);
723 if (conf->flags & IEEE80211_CONF_PS)
724 rsi_enable_ps(adapter, sta_vif);
725 else
726 rsi_disable_ps(adapter, sta_vif);
727 spin_unlock_irqrestore(&adapter->ps_lock, flags);
728 }
729 }
730
731 /* RTS threshold */
732 if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
733 rsi_dbg(INFO_ZONE, "RTS threshold\n");
734 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
735 rsi_dbg(INFO_ZONE,
736 "%s: Sending vap updates....\n", __func__);
737 status = rsi_send_vap_dynamic_update(common);
738 }
739 }
740 mutex_unlock(&common->mutex);
741
742 return status;
743 }
744
745 /**
746 * rsi_get_connected_channel() - This function is used to get the current
747 * connected channel number.
748 * @vif: Pointer to the ieee80211_vif structure.
749 *
750 * Return: Current connected AP's channel number is returned.
751 */
rsi_get_connected_channel(struct ieee80211_vif * vif)752 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
753 {
754 struct ieee80211_bss_conf *bss;
755 struct ieee80211_channel *channel;
756
757 if (!vif)
758 return 0;
759
760 bss = &vif->bss_conf;
761 channel = bss->chanreq.oper.chan;
762
763 if (!channel)
764 return 0;
765
766 return channel->hw_value;
767 }
768
rsi_switch_channel(struct rsi_hw * adapter,struct ieee80211_vif * vif)769 static void rsi_switch_channel(struct rsi_hw *adapter,
770 struct ieee80211_vif *vif)
771 {
772 struct rsi_common *common = adapter->priv;
773 struct ieee80211_channel *channel;
774
775 if (common->iface_down)
776 return;
777 if (!vif)
778 return;
779
780 channel = vif->bss_conf.chanreq.oper.chan;
781
782 if (!channel)
783 return;
784
785 rsi_band_check(common, channel);
786 rsi_set_channel(common, channel);
787 rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
788 }
789
790 /**
791 * rsi_mac80211_bss_info_changed() - This function is a handler for config
792 * requests related to BSS parameters that
793 * may vary during BSS's lifespan.
794 * @hw: Pointer to the ieee80211_hw structure.
795 * @vif: Pointer to the ieee80211_vif structure.
796 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
797 * @changed: Changed flags set.
798 *
799 * Return: None.
800 */
rsi_mac80211_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changed)801 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
802 struct ieee80211_vif *vif,
803 struct ieee80211_bss_conf *bss_conf,
804 u64 changed)
805 {
806 struct rsi_hw *adapter = hw->priv;
807 struct rsi_common *common = adapter->priv;
808 struct ieee80211_bss_conf *bss = &vif->bss_conf;
809 struct ieee80211_conf *conf = &hw->conf;
810 u16 rx_filter_word = 0;
811
812 mutex_lock(&common->mutex);
813 if (changed & BSS_CHANGED_ASSOC) {
814 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
815 __func__, vif->cfg.assoc);
816 if (vif->cfg.assoc) {
817 /* Send the RX filter frame */
818 rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
819 ALLOW_CTRL_ASSOC_PEER |
820 ALLOW_MGMT_ASSOC_PEER);
821 rsi_send_rx_filter_frame(common, rx_filter_word);
822 }
823 rsi_inform_bss_status(common,
824 RSI_OPMODE_STA,
825 vif->cfg.assoc,
826 bss_conf->bssid,
827 bss_conf->qos,
828 vif->cfg.aid,
829 NULL, 0,
830 bss_conf->assoc_capability, vif);
831 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
832 adapter->ps_info.listen_interval = conf->listen_interval;
833
834 /* If U-APSD is updated, send ps parameters to firmware */
835 if (vif->cfg.assoc) {
836 if (common->uapsd_bitmap) {
837 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
838 rsi_conf_uapsd(adapter, vif);
839 }
840 } else {
841 common->uapsd_bitmap = 0;
842 }
843 }
844
845 if (changed & BSS_CHANGED_CQM) {
846 common->cqm_info.last_cqm_event_rssi = 0;
847 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
848 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
849 rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
850 common->cqm_info.rssi_thold,
851 common->cqm_info.rssi_hyst);
852 }
853
854 if (changed & BSS_CHANGED_BEACON_INT) {
855 rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
856 __func__, bss_conf->beacon_int);
857 if (common->beacon_interval != bss->beacon_int) {
858 common->beacon_interval = bss->beacon_int;
859 if (vif->type == NL80211_IFTYPE_AP) {
860 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
861
862 rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
863 vif->addr, vif_info->vap_id,
864 VAP_UPDATE);
865 }
866 }
867 adapter->ps_info.listen_interval =
868 bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
869 }
870
871 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
872 ((vif->type == NL80211_IFTYPE_AP) ||
873 (vif->type == NL80211_IFTYPE_P2P_GO))) {
874 if (bss->enable_beacon) {
875 rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
876 common->beacon_enabled = 1;
877 } else {
878 rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
879 common->beacon_enabled = 0;
880 }
881 }
882
883 mutex_unlock(&common->mutex);
884 }
885
886 /**
887 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
888 * @hw: Pointer to the ieee80211_hw structure.
889 * @changed_flags: Changed flags set.
890 * @total_flags: Total initial flags set.
891 * @multicast: Multicast.
892 *
893 * Return: None.
894 */
rsi_mac80211_conf_filter(struct ieee80211_hw * hw,u32 changed_flags,u32 * total_flags,u64 multicast)895 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
896 u32 changed_flags,
897 u32 *total_flags,
898 u64 multicast)
899 {
900 /* Not doing much here as of now */
901 *total_flags &= RSI_SUPP_FILTERS;
902 }
903
904 /**
905 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
906 * (EDCF (aifs, cw_min, cw_max), bursting)
907 * for a hardware TX queue.
908 * @hw: Pointer to the ieee80211_hw structure
909 * @vif: Pointer to the ieee80211_vif structure.
910 * @link_id: the link ID if MLO is used, otherwise 0
911 * @queue: Queue number.
912 * @params: Pointer to ieee80211_tx_queue_params structure.
913 *
914 * Return: 0 on success, negative error code on failure.
915 */
rsi_mac80211_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)916 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
917 struct ieee80211_vif *vif,
918 unsigned int link_id, u16 queue,
919 const struct ieee80211_tx_queue_params *params)
920 {
921 struct rsi_hw *adapter = hw->priv;
922 struct rsi_common *common = adapter->priv;
923 u8 idx = 0;
924
925 if (queue >= IEEE80211_NUM_ACS)
926 return 0;
927
928 rsi_dbg(INFO_ZONE,
929 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
930 __func__, queue, params->aifs,
931 params->cw_min, params->cw_max, params->txop);
932
933 mutex_lock(&common->mutex);
934 /* Map into the way the f/w expects */
935 switch (queue) {
936 case IEEE80211_AC_VO:
937 idx = VO_Q;
938 break;
939 case IEEE80211_AC_VI:
940 idx = VI_Q;
941 break;
942 case IEEE80211_AC_BE:
943 idx = BE_Q;
944 break;
945 case IEEE80211_AC_BK:
946 idx = BK_Q;
947 break;
948 default:
949 idx = BE_Q;
950 break;
951 }
952
953 memcpy(&common->edca_params[idx],
954 params,
955 sizeof(struct ieee80211_tx_queue_params));
956
957 if (params->uapsd)
958 common->uapsd_bitmap |= idx;
959 else
960 common->uapsd_bitmap &= (~idx);
961
962 mutex_unlock(&common->mutex);
963
964 return 0;
965 }
966
967 /**
968 * rsi_hal_key_config() - This function loads the keys into the firmware.
969 * @hw: Pointer to the ieee80211_hw structure.
970 * @vif: Pointer to the ieee80211_vif structure.
971 * @key: Pointer to the ieee80211_key_conf structure.
972 * @sta: Pointer to the ieee80211_sta structure.
973 *
974 * Return: status: 0 on success, negative error codes on failure.
975 */
rsi_hal_key_config(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * key,struct ieee80211_sta * sta)976 static int rsi_hal_key_config(struct ieee80211_hw *hw,
977 struct ieee80211_vif *vif,
978 struct ieee80211_key_conf *key,
979 struct ieee80211_sta *sta)
980 {
981 struct rsi_hw *adapter = hw->priv;
982 struct rsi_sta *rsta = NULL;
983 int status;
984 u8 key_type;
985 s16 sta_id = 0;
986
987 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
988 key_type = RSI_PAIRWISE_KEY;
989 else
990 key_type = RSI_GROUP_KEY;
991
992 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
993 __func__, key->cipher, key_type, key->keylen);
994
995 if ((vif->type == NL80211_IFTYPE_AP) ||
996 (vif->type == NL80211_IFTYPE_P2P_GO)) {
997 if (sta) {
998 rsta = rsi_find_sta(adapter->priv, sta->addr);
999 if (rsta)
1000 sta_id = rsta->sta_id;
1001 }
1002 adapter->priv->key = key;
1003 } else {
1004 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1005 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1006 status = rsi_hal_load_key(adapter->priv,
1007 key->key,
1008 key->keylen,
1009 RSI_PAIRWISE_KEY,
1010 key->keyidx,
1011 key->cipher,
1012 sta_id,
1013 vif);
1014 if (status)
1015 return status;
1016 }
1017 }
1018
1019 status = rsi_hal_load_key(adapter->priv,
1020 key->key,
1021 key->keylen,
1022 key_type,
1023 key->keyidx,
1024 key->cipher,
1025 sta_id,
1026 vif);
1027 if (status)
1028 return status;
1029
1030 if (vif->type == NL80211_IFTYPE_STATION &&
1031 (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1032 key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1033 if (!rsi_send_block_unblock_frame(adapter->priv, false))
1034 adapter->priv->hw_data_qs_blocked = false;
1035 }
1036
1037 return 0;
1038 }
1039
1040 /**
1041 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1042 * @hw: Pointer to the ieee80211_hw structure.
1043 * @cmd: enum set_key_cmd.
1044 * @vif: Pointer to the ieee80211_vif structure.
1045 * @sta: Pointer to the ieee80211_sta structure.
1046 * @key: Pointer to the ieee80211_key_conf structure.
1047 *
1048 * Return: status: 0 on success, negative error code on failure.
1049 */
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)1050 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1051 enum set_key_cmd cmd,
1052 struct ieee80211_vif *vif,
1053 struct ieee80211_sta *sta,
1054 struct ieee80211_key_conf *key)
1055 {
1056 struct rsi_hw *adapter = hw->priv;
1057 struct rsi_common *common = adapter->priv;
1058 struct security_info *secinfo = &common->secinfo;
1059 int status;
1060
1061 mutex_lock(&common->mutex);
1062 switch (cmd) {
1063 case SET_KEY:
1064 status = rsi_hal_key_config(hw, vif, key, sta);
1065 if (status) {
1066 mutex_unlock(&common->mutex);
1067 return status;
1068 }
1069
1070 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1071 secinfo->ptk_cipher = key->cipher;
1072 else
1073 secinfo->gtk_cipher = key->cipher;
1074
1075 key->hw_key_idx = key->keyidx;
1076 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1077
1078 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1079 break;
1080
1081 case DISABLE_KEY:
1082 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1083 memset(key, 0, sizeof(struct ieee80211_key_conf));
1084 status = rsi_hal_key_config(hw, vif, key, sta);
1085 break;
1086
1087 default:
1088 status = -EOPNOTSUPP;
1089 break;
1090 }
1091
1092 mutex_unlock(&common->mutex);
1093 return status;
1094 }
1095
1096 /**
1097 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1098 * the corresponding mlme_action flag and
1099 * informs the f/w regarding this.
1100 * @hw: Pointer to the ieee80211_hw structure.
1101 * @vif: Pointer to the ieee80211_vif structure.
1102 * @params: Pointer to A-MPDU action parameters
1103 *
1104 * Return: status: 0 on success, negative error code on failure.
1105 */
rsi_mac80211_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)1106 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1107 struct ieee80211_vif *vif,
1108 struct ieee80211_ampdu_params *params)
1109 {
1110 int status = -EOPNOTSUPP;
1111 struct rsi_hw *adapter = hw->priv;
1112 struct rsi_common *common = adapter->priv;
1113 struct rsi_sta *rsta = NULL;
1114 u16 seq_no = 0, seq_start = 0;
1115 u8 ii = 0;
1116 struct ieee80211_sta *sta = params->sta;
1117 u8 sta_id = 0;
1118 enum ieee80211_ampdu_mlme_action action = params->action;
1119 u16 tid = params->tid;
1120 u16 *ssn = ¶ms->ssn;
1121 u8 buf_size = params->buf_size;
1122
1123 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1124 if (vif == adapter->vifs[ii])
1125 break;
1126 }
1127
1128 if (ii >= RSI_MAX_VIFS)
1129 return status;
1130
1131 mutex_lock(&common->mutex);
1132
1133 if (ssn != NULL)
1134 seq_no = *ssn;
1135
1136 if ((vif->type == NL80211_IFTYPE_AP) ||
1137 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1138 rsta = rsi_find_sta(common, sta->addr);
1139 if (!rsta) {
1140 rsi_dbg(ERR_ZONE, "No station mapped\n");
1141 status = 0;
1142 goto unlock;
1143 }
1144 sta_id = rsta->sta_id;
1145 }
1146
1147 rsi_dbg(INFO_ZONE,
1148 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1149 __func__, tid, seq_no, buf_size, sta_id);
1150
1151 switch (action) {
1152 case IEEE80211_AMPDU_RX_START:
1153 status = rsi_send_aggregation_params_frame(common,
1154 tid,
1155 seq_no,
1156 buf_size,
1157 STA_RX_ADDBA_DONE,
1158 sta_id);
1159 break;
1160
1161 case IEEE80211_AMPDU_RX_STOP:
1162 status = rsi_send_aggregation_params_frame(common,
1163 tid,
1164 0,
1165 buf_size,
1166 STA_RX_DELBA,
1167 sta_id);
1168 break;
1169
1170 case IEEE80211_AMPDU_TX_START:
1171 if ((vif->type == NL80211_IFTYPE_STATION) ||
1172 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1173 common->vif_info[ii].seq_start = seq_no;
1174 else if ((vif->type == NL80211_IFTYPE_AP) ||
1175 (vif->type == NL80211_IFTYPE_P2P_GO))
1176 rsta->seq_start[tid] = seq_no;
1177 status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1178 break;
1179
1180 case IEEE80211_AMPDU_TX_STOP_CONT:
1181 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1182 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1183 status = rsi_send_aggregation_params_frame(common,
1184 tid,
1185 seq_no,
1186 buf_size,
1187 STA_TX_DELBA,
1188 sta_id);
1189 if (!status)
1190 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1191 break;
1192
1193 case IEEE80211_AMPDU_TX_OPERATIONAL:
1194 if ((vif->type == NL80211_IFTYPE_STATION) ||
1195 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1196 seq_start = common->vif_info[ii].seq_start;
1197 else if ((vif->type == NL80211_IFTYPE_AP) ||
1198 (vif->type == NL80211_IFTYPE_P2P_GO))
1199 seq_start = rsta->seq_start[tid];
1200 status = rsi_send_aggregation_params_frame(common,
1201 tid,
1202 seq_start,
1203 buf_size,
1204 STA_TX_ADDBA_DONE,
1205 sta_id);
1206 break;
1207
1208 default:
1209 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1210 break;
1211 }
1212
1213 unlock:
1214 mutex_unlock(&common->mutex);
1215 return status;
1216 }
1217
1218 /**
1219 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1220 * @hw: Pointer to the ieee80211_hw structure.
1221 * @radio_idx: Radio index.
1222 * @value: Rts threshold value.
1223 *
1224 * Return: 0 on success.
1225 */
rsi_mac80211_set_rts_threshold(struct ieee80211_hw * hw,int radio_idx,u32 value)1226 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1227 int radio_idx, u32 value)
1228 {
1229 struct rsi_hw *adapter = hw->priv;
1230 struct rsi_common *common = adapter->priv;
1231
1232 mutex_lock(&common->mutex);
1233 common->rts_threshold = value;
1234 mutex_unlock(&common->mutex);
1235
1236 return 0;
1237 }
1238
1239 /**
1240 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1241 * @hw: Pointer to the ieee80211_hw structure
1242 * @vif: Pointer to the ieee80211_vif structure.
1243 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1244 *
1245 * Return: 0 on success.
1246 */
rsi_mac80211_set_rate_mask(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct cfg80211_bitrate_mask * mask)1247 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1248 struct ieee80211_vif *vif,
1249 const struct cfg80211_bitrate_mask *mask)
1250 {
1251 const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1252 struct rsi_hw *adapter = hw->priv;
1253 struct rsi_common *common = adapter->priv;
1254 int i;
1255
1256 mutex_lock(&common->mutex);
1257
1258 for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1259 struct rsi_rate_config *cfg = &common->rate_config[i];
1260 u32 bm;
1261
1262 bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1263 if (hweight32(bm) == 1) { /* single rate */
1264 int rate_index = ffs(bm) - 1;
1265
1266 if (rate_index < mcs_offset)
1267 cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1268 else
1269 cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1270 cfg->fixed_enabled = true;
1271 } else {
1272 cfg->configured_mask = bm;
1273 cfg->fixed_enabled = false;
1274 }
1275 }
1276
1277 mutex_unlock(&common->mutex);
1278
1279 return 0;
1280 }
1281
1282 /**
1283 * rsi_perform_cqm() - This function performs cqm.
1284 * @common: Pointer to the driver private structure.
1285 * @bssid: pointer to the bssid.
1286 * @rssi: RSSI value.
1287 * @vif: Pointer to the ieee80211_vif structure.
1288 */
rsi_perform_cqm(struct rsi_common * common,u8 * bssid,s8 rssi,struct ieee80211_vif * vif)1289 static void rsi_perform_cqm(struct rsi_common *common,
1290 u8 *bssid,
1291 s8 rssi,
1292 struct ieee80211_vif *vif)
1293 {
1294 s8 last_event = common->cqm_info.last_cqm_event_rssi;
1295 int thold = common->cqm_info.rssi_thold;
1296 u32 hyst = common->cqm_info.rssi_hyst;
1297 enum nl80211_cqm_rssi_threshold_event event;
1298
1299 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1300 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1301 else if (rssi > thold &&
1302 (last_event == 0 || rssi > (last_event + hyst)))
1303 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1304 else
1305 return;
1306
1307 common->cqm_info.last_cqm_event_rssi = rssi;
1308 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1309 ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1310
1311 return;
1312 }
1313
1314 /**
1315 * rsi_fill_rx_status() - This function fills rx status in
1316 * ieee80211_rx_status structure.
1317 * @hw: Pointer to the ieee80211_hw structure.
1318 * @skb: Pointer to the socket buffer structure.
1319 * @common: Pointer to the driver private structure.
1320 * @rxs: Pointer to the ieee80211_rx_status structure.
1321 *
1322 * Return: None.
1323 */
rsi_fill_rx_status(struct ieee80211_hw * hw,struct sk_buff * skb,struct rsi_common * common,struct ieee80211_rx_status * rxs)1324 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1325 struct sk_buff *skb,
1326 struct rsi_common *common,
1327 struct ieee80211_rx_status *rxs)
1328 {
1329 struct rsi_hw *adapter = common->priv;
1330 struct ieee80211_vif *vif;
1331 struct ieee80211_bss_conf *bss = NULL;
1332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1333 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1334 struct ieee80211_hdr *hdr;
1335 char rssi = rx_params->rssi;
1336 u8 hdrlen = 0;
1337 u8 channel = rx_params->channel;
1338 s32 freq;
1339 int i;
1340
1341 hdr = ((struct ieee80211_hdr *)(skb->data));
1342 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1343
1344 memset(info, 0, sizeof(struct ieee80211_tx_info));
1345
1346 rxs->signal = -(rssi);
1347
1348 rxs->band = common->band;
1349
1350 freq = ieee80211_channel_to_frequency(channel, rxs->band);
1351
1352 if (freq)
1353 rxs->freq = freq;
1354
1355 if (ieee80211_has_protected(hdr->frame_control)) {
1356 if (rsi_is_cipher_wep(common)) {
1357 memmove(skb->data + 4, skb->data, hdrlen);
1358 skb_pull(skb, 4);
1359 } else {
1360 memmove(skb->data + 8, skb->data, hdrlen);
1361 skb_pull(skb, 8);
1362 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1363 }
1364 rxs->flag |= RX_FLAG_DECRYPTED;
1365 rxs->flag |= RX_FLAG_IV_STRIPPED;
1366 }
1367
1368 for (i = 0; i < RSI_MAX_VIFS; i++) {
1369 vif = adapter->vifs[i];
1370 if (!vif)
1371 continue;
1372 if (vif->type == NL80211_IFTYPE_STATION) {
1373 bss = &vif->bss_conf;
1374 break;
1375 }
1376 }
1377 if (!bss)
1378 return;
1379 /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1380 if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1381 if (ieee80211_is_beacon(hdr->frame_control))
1382 rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1383 }
1384
1385 return;
1386 }
1387
1388 /**
1389 * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1390 * @common: Pointer to the driver private structure.
1391 * @skb: Pointer to the socket buffer structure.
1392 *
1393 * Return: None.
1394 */
rsi_indicate_pkt_to_os(struct rsi_common * common,struct sk_buff * skb)1395 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1396 struct sk_buff *skb)
1397 {
1398 struct rsi_hw *adapter = common->priv;
1399 struct ieee80211_hw *hw = adapter->hw;
1400 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1401
1402 if ((common->iface_down) || (!adapter->sc_nvifs)) {
1403 dev_kfree_skb(skb);
1404 return;
1405 }
1406
1407 /* filling in the ieee80211_rx_status flags */
1408 rsi_fill_rx_status(hw, skb, common, rx_status);
1409
1410 ieee80211_rx_irqsafe(hw, skb);
1411 }
1412
1413 /**
1414 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1415 * connected.
1416 * @hw: pointer to the ieee80211_hw structure.
1417 * @vif: Pointer to the ieee80211_vif structure.
1418 * @sta: Pointer to the ieee80211_sta structure.
1419 *
1420 * Return: 0 on success, negative error codes on failure.
1421 */
rsi_mac80211_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1422 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1423 struct ieee80211_vif *vif,
1424 struct ieee80211_sta *sta)
1425 {
1426 struct rsi_hw *adapter = hw->priv;
1427 struct rsi_common *common = adapter->priv;
1428 bool sta_exist = false;
1429 struct rsi_sta *rsta;
1430 int status = 0;
1431
1432 rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1433
1434 mutex_lock(&common->mutex);
1435
1436 if ((vif->type == NL80211_IFTYPE_AP) ||
1437 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1438 u8 cnt;
1439 int sta_idx = -1;
1440 int free_index = -1;
1441
1442 /* Check if max stations reached */
1443 if (common->num_stations >= common->max_stations) {
1444 rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1445 status = -EOPNOTSUPP;
1446 goto unlock;
1447 }
1448 for (cnt = 0; cnt < common->max_stations; cnt++) {
1449 rsta = &common->stations[cnt];
1450
1451 if (!rsta->sta) {
1452 if (free_index < 0)
1453 free_index = cnt;
1454 continue;
1455 }
1456 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1457 rsi_dbg(INFO_ZONE, "Station exists\n");
1458 sta_idx = cnt;
1459 sta_exist = true;
1460 break;
1461 }
1462 }
1463 if (!sta_exist) {
1464 if (free_index >= 0)
1465 sta_idx = free_index;
1466 }
1467 if (sta_idx < 0) {
1468 rsi_dbg(ERR_ZONE,
1469 "%s: Some problem reaching here...\n",
1470 __func__);
1471 status = -EINVAL;
1472 goto unlock;
1473 }
1474 rsta = &common->stations[sta_idx];
1475 rsta->sta = sta;
1476 rsta->sta_id = sta_idx;
1477 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1478 rsta->start_tx_aggr[cnt] = false;
1479 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1480 rsta->seq_start[cnt] = 0;
1481 if (!sta_exist) {
1482 rsi_dbg(INFO_ZONE, "New Station\n");
1483
1484 /* Send peer notify to device */
1485 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1486 rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1487 sta->addr, sta->wme, sta->aid,
1488 sta, sta_idx, 0, vif);
1489
1490 if (common->key) {
1491 struct ieee80211_key_conf *key = common->key;
1492
1493 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1494 (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1495 rsi_hal_load_key(adapter->priv,
1496 key->key,
1497 key->keylen,
1498 RSI_PAIRWISE_KEY,
1499 key->keyidx,
1500 key->cipher,
1501 sta_idx,
1502 vif);
1503 }
1504
1505 common->num_stations++;
1506 }
1507 }
1508
1509 if ((vif->type == NL80211_IFTYPE_STATION) ||
1510 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1511 common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1512 common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1513 if (sta->deflink.ht_cap.ht_supported) {
1514 common->bitrate_mask[NL80211_BAND_2GHZ] =
1515 sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1516 if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1517 (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1518 common->vif_info[0].sgi = true;
1519 ieee80211_start_tx_ba_session(sta, 0, 0);
1520 }
1521 }
1522
1523 unlock:
1524 mutex_unlock(&common->mutex);
1525
1526 return status;
1527 }
1528
1529 /**
1530 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1531 * getting disconnected.
1532 * @hw: Pointer to the ieee80211_hw structure.
1533 * @vif: Pointer to the ieee80211_vif structure.
1534 * @sta: Pointer to the ieee80211_sta structure.
1535 *
1536 * Return: 0 on success, negative error codes on failure.
1537 */
rsi_mac80211_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1538 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1539 struct ieee80211_vif *vif,
1540 struct ieee80211_sta *sta)
1541 {
1542 struct rsi_hw *adapter = hw->priv;
1543 struct rsi_common *common = adapter->priv;
1544 struct ieee80211_bss_conf *bss = &vif->bss_conf;
1545 struct rsi_sta *rsta;
1546
1547 rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1548
1549 mutex_lock(&common->mutex);
1550
1551 if ((vif->type == NL80211_IFTYPE_AP) ||
1552 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1553 u8 sta_idx, cnt;
1554
1555 /* Send peer notify to device */
1556 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1557 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1558 rsta = &common->stations[sta_idx];
1559
1560 if (!rsta->sta)
1561 continue;
1562 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1563 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1564 sta->addr, sta->wme,
1565 sta->aid, sta, sta_idx,
1566 0, vif);
1567 rsta->sta = NULL;
1568 rsta->sta_id = -1;
1569 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1570 rsta->start_tx_aggr[cnt] = false;
1571 if (common->num_stations > 0)
1572 common->num_stations--;
1573 break;
1574 }
1575 }
1576 if (sta_idx >= common->max_stations)
1577 rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1578 }
1579
1580 if ((vif->type == NL80211_IFTYPE_STATION) ||
1581 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1582 /* Resetting all the fields to default values */
1583 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1584 bss->qos = sta->wme;
1585 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1586 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1587 common->vif_info[0].is_ht = false;
1588 common->vif_info[0].sgi = false;
1589 common->vif_info[0].seq_start = 0;
1590 common->secinfo.ptk_cipher = 0;
1591 common->secinfo.gtk_cipher = 0;
1592 if (!common->iface_down)
1593 rsi_send_rx_filter_frame(common, 0);
1594 }
1595 mutex_unlock(&common->mutex);
1596
1597 return 0;
1598 }
1599
1600 /**
1601 * rsi_mac80211_set_antenna() - This function is used to configure
1602 * tx and rx antennas.
1603 * @hw: Pointer to the ieee80211_hw structure.
1604 * @radio_idx: Radio index
1605 * @tx_ant: Bitmap for tx antenna
1606 * @rx_ant: Bitmap for rx antenna
1607 *
1608 * Return: 0 on success, Negative error code on failure.
1609 */
rsi_mac80211_set_antenna(struct ieee80211_hw * hw,int radio_idx,u32 tx_ant,u32 rx_ant)1610 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1611 int radio_idx,
1612 u32 tx_ant, u32 rx_ant)
1613 {
1614 struct rsi_hw *adapter = hw->priv;
1615 struct rsi_common *common = adapter->priv;
1616 u8 antenna = 0;
1617
1618 if (tx_ant > 1 || rx_ant > 1) {
1619 rsi_dbg(ERR_ZONE,
1620 "Invalid antenna selection (tx: %d, rx:%d)\n",
1621 tx_ant, rx_ant);
1622 rsi_dbg(ERR_ZONE,
1623 "Use 0 for int_ant, 1 for ext_ant\n");
1624 return -EINVAL;
1625 }
1626
1627 rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1628 __func__, tx_ant, rx_ant);
1629
1630 mutex_lock(&common->mutex);
1631
1632 antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1633 if (common->ant_in_use != antenna)
1634 if (rsi_set_antenna(common, antenna))
1635 goto fail_set_antenna;
1636
1637 rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1638 tx_ant ? "UFL" : "INT");
1639
1640 common->ant_in_use = antenna;
1641
1642 mutex_unlock(&common->mutex);
1643
1644 return 0;
1645
1646 fail_set_antenna:
1647 rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1648 mutex_unlock(&common->mutex);
1649 return -EINVAL;
1650 }
1651
1652 /**
1653 * rsi_mac80211_get_antenna() - This function is used to configure
1654 * tx and rx antennas.
1655 *
1656 * @hw: Pointer to the ieee80211_hw structure.
1657 * @radio_idx: Radio index
1658 * @tx_ant: Bitmap for tx antenna
1659 * @rx_ant: Bitmap for rx antenna
1660 *
1661 * Return: 0 on success, negative error codes on failure.
1662 */
rsi_mac80211_get_antenna(struct ieee80211_hw * hw,int radio_idx,u32 * tx_ant,u32 * rx_ant)1663 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1664 int radio_idx,
1665 u32 *tx_ant, u32 *rx_ant)
1666 {
1667 struct rsi_hw *adapter = hw->priv;
1668 struct rsi_common *common = adapter->priv;
1669
1670 mutex_lock(&common->mutex);
1671
1672 *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1673 *rx_ant = 0;
1674
1675 mutex_unlock(&common->mutex);
1676
1677 return 0;
1678 }
1679
rsi_map_region_code(enum nl80211_dfs_regions region_code)1680 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1681 {
1682 switch (region_code) {
1683 case NL80211_DFS_FCC:
1684 return RSI_REGION_FCC;
1685 case NL80211_DFS_ETSI:
1686 return RSI_REGION_ETSI;
1687 case NL80211_DFS_JP:
1688 return RSI_REGION_TELEC;
1689 case NL80211_DFS_UNSET:
1690 return RSI_REGION_WORLD;
1691 }
1692 return RSI_REGION_WORLD;
1693 }
1694
rsi_reg_notify(struct wiphy * wiphy,struct regulatory_request * request)1695 static void rsi_reg_notify(struct wiphy *wiphy,
1696 struct regulatory_request *request)
1697 {
1698 struct ieee80211_supported_band *sband;
1699 struct ieee80211_channel *ch;
1700 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1701 struct rsi_hw * adapter = hw->priv;
1702 struct rsi_common *common = adapter->priv;
1703 int i;
1704
1705 mutex_lock(&common->mutex);
1706
1707 rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1708 request->alpha2, request->dfs_region);
1709
1710 if (common->num_supp_bands > 1) {
1711 sband = wiphy->bands[NL80211_BAND_5GHZ];
1712
1713 for (i = 0; i < sband->n_channels; i++) {
1714 ch = &sband->channels[i];
1715 if (ch->flags & IEEE80211_CHAN_DISABLED)
1716 continue;
1717
1718 if (ch->flags & IEEE80211_CHAN_RADAR)
1719 ch->flags |= IEEE80211_CHAN_NO_IR;
1720 }
1721 }
1722 adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1723 rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1724
1725 adapter->country[0] = request->alpha2[0];
1726 adapter->country[1] = request->alpha2[1];
1727
1728 mutex_unlock(&common->mutex);
1729 }
1730
rsi_mac80211_rfkill_poll(struct ieee80211_hw * hw)1731 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1732 {
1733 struct rsi_hw *adapter = hw->priv;
1734 struct rsi_common *common = adapter->priv;
1735
1736 mutex_lock(&common->mutex);
1737 if (common->fsm_state != FSM_MAC_INIT_DONE)
1738 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1739 else
1740 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1741 mutex_unlock(&common->mutex);
1742 }
1743
rsi_resume_conn_channel(struct rsi_common * common)1744 static void rsi_resume_conn_channel(struct rsi_common *common)
1745 {
1746 struct rsi_hw *adapter = common->priv;
1747 struct ieee80211_vif *vif;
1748 int cnt;
1749
1750 for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1751 vif = adapter->vifs[cnt];
1752 if (!vif)
1753 continue;
1754
1755 if ((vif->type == NL80211_IFTYPE_AP) ||
1756 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1757 rsi_switch_channel(adapter, vif);
1758 break;
1759 }
1760 if (((vif->type == NL80211_IFTYPE_STATION) ||
1761 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1762 vif->cfg.assoc) {
1763 rsi_switch_channel(adapter, vif);
1764 break;
1765 }
1766 }
1767 }
1768
rsi_roc_timeout(struct timer_list * t)1769 void rsi_roc_timeout(struct timer_list *t)
1770 {
1771 struct rsi_common *common = timer_container_of(common, t, roc_timer);
1772
1773 rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1774
1775 mutex_lock(&common->mutex);
1776 ieee80211_remain_on_channel_expired(common->priv->hw);
1777
1778 if (timer_pending(&common->roc_timer))
1779 timer_delete(&common->roc_timer);
1780
1781 rsi_resume_conn_channel(common);
1782 mutex_unlock(&common->mutex);
1783 }
1784
rsi_mac80211_roc(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel * chan,int duration,enum ieee80211_roc_type type)1785 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1786 struct ieee80211_channel *chan, int duration,
1787 enum ieee80211_roc_type type)
1788 {
1789 struct rsi_hw *adapter = hw->priv;
1790 struct rsi_common *common = adapter->priv;
1791 int status = 0;
1792
1793 rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1794
1795 mutex_lock(&common->mutex);
1796 rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1797 __func__, chan->hw_value, duration);
1798
1799 if (timer_pending(&common->roc_timer)) {
1800 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1801 timer_delete(&common->roc_timer);
1802 }
1803 common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1804 add_timer(&common->roc_timer);
1805
1806 /* Configure band */
1807 if (rsi_band_check(common, chan)) {
1808 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1809 status = -EINVAL;
1810 goto out;
1811 }
1812
1813 /* Configure channel */
1814 if (rsi_set_channel(common, chan)) {
1815 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1816 status = -EINVAL;
1817 goto out;
1818 }
1819
1820 common->roc_vif = vif;
1821 ieee80211_ready_on_channel(hw);
1822 rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1823 __func__, chan->hw_value);
1824
1825 out:
1826 mutex_unlock(&common->mutex);
1827
1828 return status;
1829 }
1830
rsi_mac80211_cancel_roc(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1831 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1832 struct ieee80211_vif *vif)
1833 {
1834 struct rsi_hw *adapter = hw->priv;
1835 struct rsi_common *common = adapter->priv;
1836
1837 rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1838
1839 mutex_lock(&common->mutex);
1840 if (!timer_pending(&common->roc_timer)) {
1841 mutex_unlock(&common->mutex);
1842 return 0;
1843 }
1844
1845 timer_delete(&common->roc_timer);
1846
1847 rsi_resume_conn_channel(common);
1848 mutex_unlock(&common->mutex);
1849
1850 return 0;
1851 }
1852
1853 #ifdef CONFIG_PM
1854 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1855 .flags = WIPHY_WOWLAN_ANY |
1856 WIPHY_WOWLAN_MAGIC_PKT |
1857 WIPHY_WOWLAN_DISCONNECT |
1858 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
1859 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1860 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
1861 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1862 };
1863
rsi_wow_map_triggers(struct rsi_common * common,struct cfg80211_wowlan * wowlan)1864 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1865 struct cfg80211_wowlan *wowlan)
1866 {
1867 u16 wow_triggers = 0;
1868
1869 rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1870
1871 if (wowlan->any)
1872 wow_triggers |= RSI_WOW_ANY;
1873 if (wowlan->magic_pkt)
1874 wow_triggers |= RSI_WOW_MAGIC_PKT;
1875 if (wowlan->disconnect)
1876 wow_triggers |= RSI_WOW_DISCONNECT;
1877 if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1878 wowlan->four_way_handshake)
1879 wow_triggers |= RSI_WOW_GTK_REKEY;
1880
1881 return wow_triggers;
1882 }
1883
rsi_config_wowlan(struct rsi_hw * adapter,struct cfg80211_wowlan * wowlan)1884 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1885 {
1886 struct rsi_common *common = adapter->priv;
1887 struct ieee80211_vif *vif = adapter->vifs[0];
1888 u16 triggers = 0;
1889 u16 rx_filter_word = 0;
1890
1891 rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1892
1893 if (!vif)
1894 return -EINVAL;
1895
1896 if (WARN_ON(!wowlan)) {
1897 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1898 return -EINVAL;
1899 }
1900
1901 common->wow_flags |= RSI_WOW_ENABLED;
1902 triggers = rsi_wow_map_triggers(common, wowlan);
1903 if (!triggers) {
1904 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1905 return -EINVAL;
1906 }
1907 if (!vif->cfg.assoc) {
1908 rsi_dbg(ERR_ZONE,
1909 "Cannot configure WoWLAN (Station not connected)\n");
1910 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1911 return 0;
1912 }
1913 rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1914
1915 if (common->coex_mode > 1)
1916 rsi_disable_ps(adapter, adapter->vifs[0]);
1917
1918 rsi_send_wowlan_request(common, triggers, 1);
1919
1920 /**
1921 * Increase the beacon_miss threshold & keep-alive timers in
1922 * vap_update frame
1923 */
1924 rsi_send_vap_dynamic_update(common);
1925
1926 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1927 rsi_send_rx_filter_frame(common, rx_filter_word);
1928
1929 return 0;
1930 }
1931 EXPORT_SYMBOL(rsi_config_wowlan);
1932
rsi_mac80211_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)1933 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1934 struct cfg80211_wowlan *wowlan)
1935 {
1936 struct rsi_hw *adapter = hw->priv;
1937 struct rsi_common *common = adapter->priv;
1938
1939 rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1940 mutex_lock(&common->mutex);
1941 if (rsi_config_wowlan(adapter, wowlan)) {
1942 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1943 mutex_unlock(&common->mutex);
1944 return 1;
1945 }
1946 mutex_unlock(&common->mutex);
1947
1948 return 0;
1949 }
1950
rsi_mac80211_resume(struct ieee80211_hw * hw)1951 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1952 {
1953 u16 rx_filter_word = 0;
1954 struct rsi_hw *adapter = hw->priv;
1955 struct rsi_common *common = adapter->priv;
1956
1957 common->wow_flags = 0;
1958
1959 rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1960
1961 if (common->hibernate_resume) {
1962 common->mac_ops_resumed = true;
1963 /* Device need a complete restart of all MAC operations.
1964 * returning 1 will serve this purpose.
1965 */
1966 return 1;
1967 }
1968
1969 mutex_lock(&common->mutex);
1970 rsi_send_wowlan_request(common, 0, 0);
1971
1972 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1973 ALLOW_MGMT_ASSOC_PEER);
1974 rsi_send_rx_filter_frame(common, rx_filter_word);
1975 mutex_unlock(&common->mutex);
1976
1977 return 0;
1978 }
1979
1980 #endif
1981
1982 static const struct ieee80211_ops mac80211_ops = {
1983 .add_chanctx = ieee80211_emulate_add_chanctx,
1984 .remove_chanctx = ieee80211_emulate_remove_chanctx,
1985 .change_chanctx = ieee80211_emulate_change_chanctx,
1986 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1987 .tx = rsi_mac80211_tx,
1988 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1989 .start = rsi_mac80211_start,
1990 .stop = rsi_mac80211_stop,
1991 .add_interface = rsi_mac80211_add_interface,
1992 .remove_interface = rsi_mac80211_remove_interface,
1993 .config = rsi_mac80211_config,
1994 .bss_info_changed = rsi_mac80211_bss_info_changed,
1995 .conf_tx = rsi_mac80211_conf_tx,
1996 .configure_filter = rsi_mac80211_conf_filter,
1997 .set_key = rsi_mac80211_set_key,
1998 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
1999 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
2000 .ampdu_action = rsi_mac80211_ampdu_action,
2001 .sta_add = rsi_mac80211_sta_add,
2002 .sta_remove = rsi_mac80211_sta_remove,
2003 .set_antenna = rsi_mac80211_set_antenna,
2004 .get_antenna = rsi_mac80211_get_antenna,
2005 .rfkill_poll = rsi_mac80211_rfkill_poll,
2006 .remain_on_channel = rsi_mac80211_roc,
2007 .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
2008 #ifdef CONFIG_PM
2009 .suspend = rsi_mac80211_suspend,
2010 .resume = rsi_mac80211_resume,
2011 #endif
2012 .hw_scan = rsi_mac80211_hw_scan_start,
2013 .cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
2014 };
2015
2016 /**
2017 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
2018 * @common: Pointer to the driver private structure.
2019 *
2020 * Return: 0 on success, negative error codes on failure.
2021 */
rsi_mac80211_attach(struct rsi_common * common)2022 int rsi_mac80211_attach(struct rsi_common *common)
2023 {
2024 int status = 0;
2025 struct ieee80211_hw *hw = NULL;
2026 struct wiphy *wiphy = NULL;
2027 struct rsi_hw *adapter = common->priv;
2028 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2029
2030 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2031
2032 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2033 if (!hw) {
2034 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2035 return -ENOMEM;
2036 }
2037
2038 wiphy = hw->wiphy;
2039
2040 SET_IEEE80211_DEV(hw, adapter->device);
2041
2042 hw->priv = adapter;
2043 adapter->hw = hw;
2044
2045 ieee80211_hw_set(hw, SIGNAL_DBM);
2046 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2047 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2048 ieee80211_hw_set(hw, SUPPORTS_PS);
2049 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2050
2051 hw->queues = MAX_HW_QUEUES;
2052 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2053 hw->vif_data_size = sizeof(struct vif_priv);
2054
2055 hw->max_rates = 1;
2056 hw->max_rate_tries = MAX_RETRIES;
2057 hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2058 hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2059
2060 hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2061 hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2062 hw->rate_control_algorithm = "AARF";
2063
2064 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2065 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2066
2067 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2068 BIT(NL80211_IFTYPE_AP) |
2069 BIT(NL80211_IFTYPE_P2P_DEVICE) |
2070 BIT(NL80211_IFTYPE_P2P_CLIENT) |
2071 BIT(NL80211_IFTYPE_P2P_GO);
2072
2073 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2074 wiphy->retry_short = RETRY_SHORT;
2075 wiphy->retry_long = RETRY_LONG;
2076 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2077 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2078 wiphy->flags = 0;
2079
2080 wiphy->available_antennas_rx = 1;
2081 wiphy->available_antennas_tx = 1;
2082
2083 status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2084 if (status)
2085 return status;
2086 wiphy->bands[NL80211_BAND_2GHZ] =
2087 &adapter->sbands[NL80211_BAND_2GHZ];
2088 if (common->num_supp_bands > 1) {
2089 status = rsi_register_rates_channels(adapter,
2090 NL80211_BAND_5GHZ);
2091 if (status)
2092 return status;
2093 wiphy->bands[NL80211_BAND_5GHZ] =
2094 &adapter->sbands[NL80211_BAND_5GHZ];
2095 }
2096
2097 /* AP Parameters */
2098 wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2099 common->max_stations = wiphy->max_ap_assoc_sta;
2100 rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2101 hw->sta_data_size = sizeof(struct rsi_sta);
2102
2103 wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2104 wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2105 wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2106 wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2107 wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2108 wiphy->reg_notifier = rsi_reg_notify;
2109
2110 #ifdef CONFIG_PM
2111 wiphy->wowlan = &rsi_wowlan_support;
2112 #endif
2113
2114 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2115
2116 /* Wi-Fi direct parameters */
2117 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2118 wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2119 wiphy->max_remain_on_channel_duration = 10000;
2120 hw->max_listen_interval = 10;
2121 wiphy->iface_combinations = rsi_iface_combinations;
2122 wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2123
2124 if (common->coex_mode > 1)
2125 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2126
2127 status = ieee80211_register_hw(hw);
2128 if (status)
2129 return status;
2130
2131 return rsi_init_dbgfs(adapter);
2132 }
2133