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 struct ieee80211_bss_conf *bss = &vif->bss_conf;
241
242 rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
243 common->mac_ops_resumed = false;
244
245 if (common->fsm_state != FSM_MAC_INIT_DONE)
246 return -ENODEV;
247
248 if ((common->wow_flags & RSI_WOW_ENABLED) ||
249 scan_req->n_channels == 0)
250 return -EINVAL;
251
252 /* Scan already in progress. So return */
253 if (common->bgscan_en)
254 return -EBUSY;
255
256 /* If STA is not connected, return with special value 1, in order
257 * to start sw_scan in mac80211
258 */
259 if (!bss->assoc)
260 return 1;
261
262 mutex_lock(&common->mutex);
263 common->hwscan = scan_req;
264 if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
265 if (!rsi_send_bgscan_probe_req(common, vif)) {
266 rsi_dbg(INFO_ZONE, "Background scan started...\n");
267 common->bgscan_en = true;
268 }
269 }
270 mutex_unlock(&common->mutex);
271
272 return 0;
273 }
274
rsi_mac80211_cancel_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif)275 static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
276 struct ieee80211_vif *vif)
277 {
278 struct rsi_hw *adapter = hw->priv;
279 struct rsi_common *common = adapter->priv;
280 struct cfg80211_scan_info info;
281
282 rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
283 mutex_lock(&common->mutex);
284
285 if (common->bgscan_en) {
286 if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
287 common->bgscan_en = false;
288 info.aborted = false;
289 ieee80211_scan_completed(adapter->hw, &info);
290 rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
291 }
292 common->hwscan = NULL;
293 mutex_unlock(&common->mutex);
294 }
295
296 /**
297 * rsi_mac80211_detach() - This function is used to de-initialize the
298 * Mac80211 stack.
299 * @adapter: Pointer to the adapter structure.
300 *
301 * Return: None.
302 */
rsi_mac80211_detach(struct rsi_hw * adapter)303 void rsi_mac80211_detach(struct rsi_hw *adapter)
304 {
305 struct ieee80211_hw *hw = adapter->hw;
306 enum nl80211_band band;
307
308 if (hw) {
309 ieee80211_stop_queues(hw);
310 ieee80211_unregister_hw(hw);
311 ieee80211_free_hw(hw);
312 adapter->hw = NULL;
313 }
314
315 for (band = 0; band < NUM_NL80211_BANDS; band++) {
316 struct ieee80211_supported_band *sband =
317 &adapter->sbands[band];
318
319 kfree(sband->channels);
320 }
321
322 #ifdef CONFIG_RSI_DEBUGFS
323 rsi_remove_dbgfs(adapter);
324 kfree(adapter->dfsentry);
325 #endif
326 }
327 EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
328
329 /**
330 * rsi_indicate_tx_status() - This function indicates the transmit status.
331 * @adapter: Pointer to the adapter structure.
332 * @skb: Pointer to the socket buffer structure.
333 * @status: Status
334 *
335 * Return: None.
336 */
rsi_indicate_tx_status(struct rsi_hw * adapter,struct sk_buff * skb,int status)337 void rsi_indicate_tx_status(struct rsi_hw *adapter,
338 struct sk_buff *skb,
339 int status)
340 {
341 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
342 struct skb_info *tx_params;
343
344 if (!adapter->hw) {
345 rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
346 return;
347 }
348
349 if (!status)
350 info->flags |= IEEE80211_TX_STAT_ACK;
351
352 tx_params = (struct skb_info *)info->driver_data;
353 skb_pull(skb, tx_params->internal_hdr_size);
354 memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
355
356 ieee80211_tx_status_irqsafe(adapter->hw, skb);
357 }
358
359 /**
360 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
361 * transmitted frame.SKB contains the buffer starting
362 * from the IEEE 802.11 header.
363 * @hw: Pointer to the ieee80211_hw structure.
364 * @control: Pointer to the ieee80211_tx_control structure
365 * @skb: Pointer to the socket buffer structure.
366 *
367 * Return: None
368 */
rsi_mac80211_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)369 static void rsi_mac80211_tx(struct ieee80211_hw *hw,
370 struct ieee80211_tx_control *control,
371 struct sk_buff *skb)
372 {
373 struct rsi_hw *adapter = hw->priv;
374 struct rsi_common *common = adapter->priv;
375 struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
376
377 if (ieee80211_is_auth(wlh->frame_control))
378 common->mac_ops_resumed = false;
379
380 rsi_core_xmit(common, skb);
381 }
382
383 /**
384 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
385 * the driver init is complete by then, just
386 * returns success.
387 * @hw: Pointer to the ieee80211_hw structure.
388 *
389 * Return: 0 as success.
390 */
rsi_mac80211_start(struct ieee80211_hw * hw)391 static int rsi_mac80211_start(struct ieee80211_hw *hw)
392 {
393 struct rsi_hw *adapter = hw->priv;
394 struct rsi_common *common = adapter->priv;
395
396 rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
397 mutex_lock(&common->mutex);
398 if (common->hibernate_resume) {
399 common->reinit_hw = true;
400 adapter->host_intf_ops->reinit_device(adapter);
401 wait_for_completion(&adapter->priv->wlan_init_completion);
402 }
403 common->iface_down = false;
404 wiphy_rfkill_start_polling(hw->wiphy);
405 rsi_send_rx_filter_frame(common, 0);
406 mutex_unlock(&common->mutex);
407
408 return 0;
409 }
410
411 /**
412 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
413 * @hw: Pointer to the ieee80211_hw structure.
414 *
415 * Return: None.
416 */
rsi_mac80211_stop(struct ieee80211_hw * hw)417 static void rsi_mac80211_stop(struct ieee80211_hw *hw)
418 {
419 struct rsi_hw *adapter = hw->priv;
420 struct rsi_common *common = adapter->priv;
421
422 rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
423 mutex_lock(&common->mutex);
424 common->iface_down = true;
425 wiphy_rfkill_stop_polling(hw->wiphy);
426
427 /* Block all rx frames */
428 rsi_send_rx_filter_frame(common, 0xffff);
429
430 mutex_unlock(&common->mutex);
431 }
432
rsi_map_intf_mode(enum nl80211_iftype vif_type)433 static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
434 {
435 switch (vif_type) {
436 case NL80211_IFTYPE_STATION:
437 return RSI_OPMODE_STA;
438 case NL80211_IFTYPE_AP:
439 return RSI_OPMODE_AP;
440 case NL80211_IFTYPE_P2P_DEVICE:
441 return RSI_OPMODE_P2P_CLIENT;
442 case NL80211_IFTYPE_P2P_CLIENT:
443 return RSI_OPMODE_P2P_CLIENT;
444 case NL80211_IFTYPE_P2P_GO:
445 return RSI_OPMODE_P2P_GO;
446 default:
447 return RSI_OPMODE_UNSUPPORTED;
448 }
449 }
450
451 /**
452 * rsi_mac80211_add_interface() - This function is called when a netdevice
453 * attached to the hardware is enabled.
454 * @hw: Pointer to the ieee80211_hw structure.
455 * @vif: Pointer to the ieee80211_vif structure.
456 *
457 * Return: ret: 0 on success, negative error code on failure.
458 */
rsi_mac80211_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)459 static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
460 struct ieee80211_vif *vif)
461 {
462 struct rsi_hw *adapter = hw->priv;
463 struct rsi_common *common = adapter->priv;
464 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
465 enum opmode intf_mode;
466 enum vap_status vap_status;
467 int vap_idx = -1, i;
468
469 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
470 mutex_lock(&common->mutex);
471
472 intf_mode = rsi_map_intf_mode(vif->type);
473 if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
474 rsi_dbg(ERR_ZONE,
475 "%s: Interface type %d not supported\n", __func__,
476 vif->type);
477 mutex_unlock(&common->mutex);
478 return -EOPNOTSUPP;
479 }
480 if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
481 (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
482 (vif->type == NL80211_IFTYPE_P2P_GO))
483 common->p2p_enabled = true;
484
485 /* Get free vap index */
486 for (i = 0; i < RSI_MAX_VIFS; i++) {
487 if (!adapter->vifs[i] ||
488 !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
489 vap_idx = i;
490 break;
491 }
492 }
493 if (vap_idx < 0) {
494 rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
495 mutex_unlock(&common->mutex);
496 return -EOPNOTSUPP;
497 }
498 vif_info->vap_id = vap_idx;
499 adapter->vifs[vap_idx] = vif;
500 adapter->sc_nvifs++;
501 vap_status = VAP_ADD;
502
503 if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
504 vif_info->vap_id, vap_status)) {
505 rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
506 mutex_unlock(&common->mutex);
507 return -EINVAL;
508 }
509
510 if ((vif->type == NL80211_IFTYPE_AP) ||
511 (vif->type == NL80211_IFTYPE_P2P_GO)) {
512 rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
513 common->min_rate = RSI_RATE_AUTO;
514 for (i = 0; i < common->max_stations; i++)
515 common->stations[i].sta = NULL;
516 }
517
518 mutex_unlock(&common->mutex);
519
520 return 0;
521 }
522
523 /**
524 * rsi_mac80211_remove_interface() - This function notifies driver that an
525 * interface is going down.
526 * @hw: Pointer to the ieee80211_hw structure.
527 * @vif: Pointer to the ieee80211_vif structure.
528 *
529 * Return: None.
530 */
rsi_mac80211_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)531 static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
532 struct ieee80211_vif *vif)
533 {
534 struct rsi_hw *adapter = hw->priv;
535 struct rsi_common *common = adapter->priv;
536 enum opmode opmode;
537 int i;
538
539 rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
540
541 mutex_lock(&common->mutex);
542
543 if (adapter->sc_nvifs <= 0) {
544 mutex_unlock(&common->mutex);
545 return;
546 }
547
548 opmode = rsi_map_intf_mode(vif->type);
549 if (opmode == RSI_OPMODE_UNSUPPORTED) {
550 rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
551 mutex_unlock(&common->mutex);
552 return;
553 }
554 for (i = 0; i < RSI_MAX_VIFS; i++) {
555 if (!adapter->vifs[i])
556 continue;
557 if (vif == adapter->vifs[i]) {
558 rsi_set_vap_capabilities(common, opmode, vif->addr,
559 i, VAP_DELETE);
560 adapter->sc_nvifs--;
561 adapter->vifs[i] = NULL;
562 }
563 }
564 mutex_unlock(&common->mutex);
565 }
566
567 /**
568 * rsi_channel_change() - This function is a performs the checks
569 * required for changing a channel and sets
570 * the channel accordingly.
571 * @hw: Pointer to the ieee80211_hw structure.
572 *
573 * Return: 0 on success, negative error code on failure.
574 */
rsi_channel_change(struct ieee80211_hw * hw)575 static int rsi_channel_change(struct ieee80211_hw *hw)
576 {
577 struct rsi_hw *adapter = hw->priv;
578 struct rsi_common *common = adapter->priv;
579 int status = -EOPNOTSUPP;
580 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
581 u16 channel = curchan->hw_value;
582 struct ieee80211_vif *vif;
583 struct ieee80211_bss_conf *bss;
584 bool assoc = false;
585 int i;
586
587 rsi_dbg(INFO_ZONE,
588 "%s: Set channel: %d MHz type: %d channel_no %d\n",
589 __func__, curchan->center_freq,
590 curchan->flags, channel);
591
592 for (i = 0; i < RSI_MAX_VIFS; i++) {
593 vif = adapter->vifs[i];
594 if (!vif)
595 continue;
596 if (vif->type == NL80211_IFTYPE_STATION) {
597 bss = &vif->bss_conf;
598 if (bss->assoc) {
599 assoc = true;
600 break;
601 }
602 }
603 }
604 if (assoc) {
605 if (!common->hw_data_qs_blocked &&
606 (rsi_get_connected_channel(vif) != channel)) {
607 rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
608 if (!rsi_send_block_unblock_frame(common, true))
609 common->hw_data_qs_blocked = true;
610 }
611 }
612
613 status = rsi_band_check(common, curchan);
614 if (!status)
615 status = rsi_set_channel(adapter->priv, curchan);
616
617 if (assoc) {
618 if (common->hw_data_qs_blocked &&
619 (rsi_get_connected_channel(vif) == channel)) {
620 rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
621 if (!rsi_send_block_unblock_frame(common, false))
622 common->hw_data_qs_blocked = false;
623 }
624 }
625
626 return status;
627 }
628
629 /**
630 * rsi_config_power() - This function configures tx power to device
631 * @hw: Pointer to the ieee80211_hw structure.
632 *
633 * Return: 0 on success, negative error code on failure.
634 */
rsi_config_power(struct ieee80211_hw * hw)635 static int rsi_config_power(struct ieee80211_hw *hw)
636 {
637 struct rsi_hw *adapter = hw->priv;
638 struct rsi_common *common = adapter->priv;
639 struct ieee80211_conf *conf = &hw->conf;
640
641 if (adapter->sc_nvifs <= 0) {
642 rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
643 return -EINVAL;
644 }
645
646 rsi_dbg(INFO_ZONE,
647 "%s: Set tx power: %d dBM\n", __func__, conf->power_level);
648
649 if (conf->power_level == common->tx_power)
650 return 0;
651
652 common->tx_power = conf->power_level;
653
654 return rsi_send_radio_params_update(common);
655 }
656
657 /**
658 * rsi_mac80211_config() - This function is a handler for configuration
659 * requests. The stack calls this function to
660 * change hardware configuration, e.g., channel.
661 * @hw: Pointer to the ieee80211_hw structure.
662 * @changed: Changed flags set.
663 *
664 * Return: 0 on success, negative error code on failure.
665 */
rsi_mac80211_config(struct ieee80211_hw * hw,u32 changed)666 static int rsi_mac80211_config(struct ieee80211_hw *hw,
667 u32 changed)
668 {
669 struct rsi_hw *adapter = hw->priv;
670 struct rsi_common *common = adapter->priv;
671 struct ieee80211_conf *conf = &hw->conf;
672 int status = -EOPNOTSUPP;
673
674 mutex_lock(&common->mutex);
675
676 if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
677 status = rsi_channel_change(hw);
678
679 /* tx power */
680 if (changed & IEEE80211_CONF_CHANGE_POWER) {
681 rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
682 status = rsi_config_power(hw);
683 }
684
685 /* Power save parameters */
686 if ((changed & IEEE80211_CONF_CHANGE_PS) &&
687 !common->mac_ops_resumed) {
688 struct ieee80211_vif *vif, *sta_vif = NULL;
689 unsigned long flags;
690 int i, set_ps = 1;
691
692 for (i = 0; i < RSI_MAX_VIFS; i++) {
693 vif = adapter->vifs[i];
694 if (!vif)
695 continue;
696 /* Don't go to power save if AP vap exists */
697 if ((vif->type == NL80211_IFTYPE_AP) ||
698 (vif->type == NL80211_IFTYPE_P2P_GO)) {
699 set_ps = 0;
700 break;
701 }
702 if ((vif->type == NL80211_IFTYPE_STATION ||
703 vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
704 (!sta_vif || vif->bss_conf.assoc))
705 sta_vif = vif;
706 }
707 if (set_ps && sta_vif) {
708 spin_lock_irqsave(&adapter->ps_lock, flags);
709 if (conf->flags & IEEE80211_CONF_PS)
710 rsi_enable_ps(adapter, sta_vif);
711 else
712 rsi_disable_ps(adapter, sta_vif);
713 spin_unlock_irqrestore(&adapter->ps_lock, flags);
714 }
715 }
716
717 /* RTS threshold */
718 if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
719 rsi_dbg(INFO_ZONE, "RTS threshold\n");
720 if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
721 rsi_dbg(INFO_ZONE,
722 "%s: Sending vap updates....\n", __func__);
723 status = rsi_send_vap_dynamic_update(common);
724 }
725 }
726 mutex_unlock(&common->mutex);
727
728 return status;
729 }
730
731 /**
732 * rsi_get_connected_channel() - This function is used to get the current
733 * connected channel number.
734 * @vif: Pointer to the ieee80211_vif structure.
735 *
736 * Return: Current connected AP's channel number is returned.
737 */
rsi_get_connected_channel(struct ieee80211_vif * vif)738 u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
739 {
740 struct ieee80211_bss_conf *bss;
741 struct ieee80211_channel *channel;
742
743 if (!vif)
744 return 0;
745
746 bss = &vif->bss_conf;
747 channel = bss->chandef.chan;
748
749 if (!channel)
750 return 0;
751
752 return channel->hw_value;
753 }
754
rsi_switch_channel(struct rsi_hw * adapter,struct ieee80211_vif * vif)755 static void rsi_switch_channel(struct rsi_hw *adapter,
756 struct ieee80211_vif *vif)
757 {
758 struct rsi_common *common = adapter->priv;
759 struct ieee80211_channel *channel;
760
761 if (common->iface_down)
762 return;
763 if (!vif)
764 return;
765
766 channel = vif->bss_conf.chandef.chan;
767
768 if (!channel)
769 return;
770
771 rsi_band_check(common, channel);
772 rsi_set_channel(common, channel);
773 rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
774 }
775
776 /**
777 * rsi_mac80211_bss_info_changed() - This function is a handler for config
778 * requests related to BSS parameters that
779 * may vary during BSS's lifespan.
780 * @hw: Pointer to the ieee80211_hw structure.
781 * @vif: Pointer to the ieee80211_vif structure.
782 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
783 * @changed: Changed flags set.
784 *
785 * Return: None.
786 */
rsi_mac80211_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changed)787 static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
788 struct ieee80211_vif *vif,
789 struct ieee80211_bss_conf *bss_conf,
790 u32 changed)
791 {
792 struct rsi_hw *adapter = hw->priv;
793 struct rsi_common *common = adapter->priv;
794 struct ieee80211_bss_conf *bss = &vif->bss_conf;
795 struct ieee80211_conf *conf = &hw->conf;
796 u16 rx_filter_word = 0;
797
798 mutex_lock(&common->mutex);
799 if (changed & BSS_CHANGED_ASSOC) {
800 rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
801 __func__, bss_conf->assoc);
802 if (bss_conf->assoc) {
803 /* Send the RX filter frame */
804 rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
805 ALLOW_CTRL_ASSOC_PEER |
806 ALLOW_MGMT_ASSOC_PEER);
807 rsi_send_rx_filter_frame(common, rx_filter_word);
808 }
809 rsi_inform_bss_status(common,
810 RSI_OPMODE_STA,
811 bss_conf->assoc,
812 bss_conf->bssid,
813 bss_conf->qos,
814 bss_conf->aid,
815 NULL, 0,
816 bss_conf->assoc_capability, vif);
817 adapter->ps_info.dtim_interval_duration = bss->dtim_period;
818 adapter->ps_info.listen_interval = conf->listen_interval;
819
820 /* If U-APSD is updated, send ps parameters to firmware */
821 if (bss->assoc) {
822 if (common->uapsd_bitmap) {
823 rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
824 rsi_conf_uapsd(adapter, vif);
825 }
826 } else {
827 common->uapsd_bitmap = 0;
828 }
829 }
830
831 if (changed & BSS_CHANGED_CQM) {
832 common->cqm_info.last_cqm_event_rssi = 0;
833 common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
834 common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
835 rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
836 common->cqm_info.rssi_thold,
837 common->cqm_info.rssi_hyst);
838 }
839
840 if (changed & BSS_CHANGED_BEACON_INT) {
841 rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
842 __func__, bss_conf->beacon_int);
843 if (common->beacon_interval != bss->beacon_int) {
844 common->beacon_interval = bss->beacon_int;
845 if (vif->type == NL80211_IFTYPE_AP) {
846 struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
847
848 rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
849 vif->addr, vif_info->vap_id,
850 VAP_UPDATE);
851 }
852 }
853 adapter->ps_info.listen_interval =
854 bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
855 }
856
857 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
858 ((vif->type == NL80211_IFTYPE_AP) ||
859 (vif->type == NL80211_IFTYPE_P2P_GO))) {
860 if (bss->enable_beacon) {
861 rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
862 common->beacon_enabled = 1;
863 } else {
864 rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
865 common->beacon_enabled = 0;
866 }
867 }
868
869 mutex_unlock(&common->mutex);
870 }
871
872 /**
873 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
874 * @hw: Pointer to the ieee80211_hw structure.
875 * @changed_flags: Changed flags set.
876 * @total_flags: Total initial flags set.
877 * @multicast: Multicast.
878 *
879 * Return: None.
880 */
rsi_mac80211_conf_filter(struct ieee80211_hw * hw,u32 changed_flags,u32 * total_flags,u64 multicast)881 static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
882 u32 changed_flags,
883 u32 *total_flags,
884 u64 multicast)
885 {
886 /* Not doing much here as of now */
887 *total_flags &= RSI_SUPP_FILTERS;
888 }
889
890 /**
891 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
892 * (EDCF (aifs, cw_min, cw_max), bursting)
893 * for a hardware TX queue.
894 * @hw: Pointer to the ieee80211_hw structure
895 * @vif: Pointer to the ieee80211_vif structure.
896 * @queue: Queue number.
897 * @params: Pointer to ieee80211_tx_queue_params structure.
898 *
899 * Return: 0 on success, negative error code on failure.
900 */
rsi_mac80211_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)901 static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
902 struct ieee80211_vif *vif, u16 queue,
903 const struct ieee80211_tx_queue_params *params)
904 {
905 struct rsi_hw *adapter = hw->priv;
906 struct rsi_common *common = adapter->priv;
907 u8 idx = 0;
908
909 if (queue >= IEEE80211_NUM_ACS)
910 return 0;
911
912 rsi_dbg(INFO_ZONE,
913 "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
914 __func__, queue, params->aifs,
915 params->cw_min, params->cw_max, params->txop);
916
917 mutex_lock(&common->mutex);
918 /* Map into the way the f/w expects */
919 switch (queue) {
920 case IEEE80211_AC_VO:
921 idx = VO_Q;
922 break;
923 case IEEE80211_AC_VI:
924 idx = VI_Q;
925 break;
926 case IEEE80211_AC_BE:
927 idx = BE_Q;
928 break;
929 case IEEE80211_AC_BK:
930 idx = BK_Q;
931 break;
932 default:
933 idx = BE_Q;
934 break;
935 }
936
937 memcpy(&common->edca_params[idx],
938 params,
939 sizeof(struct ieee80211_tx_queue_params));
940
941 if (params->uapsd)
942 common->uapsd_bitmap |= idx;
943 else
944 common->uapsd_bitmap &= (~idx);
945
946 mutex_unlock(&common->mutex);
947
948 return 0;
949 }
950
951 /**
952 * rsi_hal_key_config() - This function loads the keys into the firmware.
953 * @hw: Pointer to the ieee80211_hw structure.
954 * @vif: Pointer to the ieee80211_vif structure.
955 * @key: Pointer to the ieee80211_key_conf structure.
956 * @sta: Pointer to the ieee80211_sta structure.
957 *
958 * Return: status: 0 on success, negative error codes on failure.
959 */
rsi_hal_key_config(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_key_conf * key,struct ieee80211_sta * sta)960 static int rsi_hal_key_config(struct ieee80211_hw *hw,
961 struct ieee80211_vif *vif,
962 struct ieee80211_key_conf *key,
963 struct ieee80211_sta *sta)
964 {
965 struct rsi_hw *adapter = hw->priv;
966 struct rsi_sta *rsta = NULL;
967 int status;
968 u8 key_type;
969 s16 sta_id = 0;
970
971 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
972 key_type = RSI_PAIRWISE_KEY;
973 else
974 key_type = RSI_GROUP_KEY;
975
976 rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
977 __func__, key->cipher, key_type, key->keylen);
978
979 if ((vif->type == NL80211_IFTYPE_AP) ||
980 (vif->type == NL80211_IFTYPE_P2P_GO)) {
981 if (sta) {
982 rsta = rsi_find_sta(adapter->priv, sta->addr);
983 if (rsta)
984 sta_id = rsta->sta_id;
985 }
986 adapter->priv->key = key;
987 } else {
988 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
989 (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
990 status = rsi_hal_load_key(adapter->priv,
991 key->key,
992 key->keylen,
993 RSI_PAIRWISE_KEY,
994 key->keyidx,
995 key->cipher,
996 sta_id,
997 vif);
998 if (status)
999 return status;
1000 }
1001 }
1002
1003 status = rsi_hal_load_key(adapter->priv,
1004 key->key,
1005 key->keylen,
1006 key_type,
1007 key->keyidx,
1008 key->cipher,
1009 sta_id,
1010 vif);
1011 if (status)
1012 return status;
1013
1014 if (vif->type == NL80211_IFTYPE_STATION &&
1015 (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1016 key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1017 if (!rsi_send_block_unblock_frame(adapter->priv, false))
1018 adapter->priv->hw_data_qs_blocked = false;
1019 }
1020
1021 return 0;
1022 }
1023
1024 /**
1025 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1026 * @hw: Pointer to the ieee80211_hw structure.
1027 * @cmd: enum set_key_cmd.
1028 * @vif: Pointer to the ieee80211_vif structure.
1029 * @sta: Pointer to the ieee80211_sta structure.
1030 * @key: Pointer to the ieee80211_key_conf structure.
1031 *
1032 * Return: status: 0 on success, negative error code on failure.
1033 */
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)1034 static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1035 enum set_key_cmd cmd,
1036 struct ieee80211_vif *vif,
1037 struct ieee80211_sta *sta,
1038 struct ieee80211_key_conf *key)
1039 {
1040 struct rsi_hw *adapter = hw->priv;
1041 struct rsi_common *common = adapter->priv;
1042 struct security_info *secinfo = &common->secinfo;
1043 int status;
1044
1045 mutex_lock(&common->mutex);
1046 switch (cmd) {
1047 case SET_KEY:
1048 status = rsi_hal_key_config(hw, vif, key, sta);
1049 if (status) {
1050 mutex_unlock(&common->mutex);
1051 return status;
1052 }
1053
1054 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1055 secinfo->ptk_cipher = key->cipher;
1056 else
1057 secinfo->gtk_cipher = key->cipher;
1058
1059 key->hw_key_idx = key->keyidx;
1060 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1061
1062 rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1063 break;
1064
1065 case DISABLE_KEY:
1066 rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1067 memset(key, 0, sizeof(struct ieee80211_key_conf));
1068 status = rsi_hal_key_config(hw, vif, key, sta);
1069 break;
1070
1071 default:
1072 status = -EOPNOTSUPP;
1073 break;
1074 }
1075
1076 mutex_unlock(&common->mutex);
1077 return status;
1078 }
1079
1080 /**
1081 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1082 * the corresponding mlme_action flag and
1083 * informs the f/w regarding this.
1084 * @hw: Pointer to the ieee80211_hw structure.
1085 * @vif: Pointer to the ieee80211_vif structure.
1086 * @params: Pointer to A-MPDU action parameters
1087 *
1088 * Return: status: 0 on success, negative error code on failure.
1089 */
rsi_mac80211_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)1090 static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1091 struct ieee80211_vif *vif,
1092 struct ieee80211_ampdu_params *params)
1093 {
1094 int status = -EOPNOTSUPP;
1095 struct rsi_hw *adapter = hw->priv;
1096 struct rsi_common *common = adapter->priv;
1097 struct rsi_sta *rsta = NULL;
1098 u16 seq_no = 0, seq_start = 0;
1099 u8 ii = 0;
1100 struct ieee80211_sta *sta = params->sta;
1101 u8 sta_id = 0;
1102 enum ieee80211_ampdu_mlme_action action = params->action;
1103 u16 tid = params->tid;
1104 u16 *ssn = ¶ms->ssn;
1105 u8 buf_size = params->buf_size;
1106
1107 for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1108 if (vif == adapter->vifs[ii])
1109 break;
1110 }
1111
1112 mutex_lock(&common->mutex);
1113
1114 if (ssn != NULL)
1115 seq_no = *ssn;
1116
1117 if ((vif->type == NL80211_IFTYPE_AP) ||
1118 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1119 rsta = rsi_find_sta(common, sta->addr);
1120 if (!rsta) {
1121 rsi_dbg(ERR_ZONE, "No station mapped\n");
1122 status = 0;
1123 goto unlock;
1124 }
1125 sta_id = rsta->sta_id;
1126 }
1127
1128 rsi_dbg(INFO_ZONE,
1129 "%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1130 __func__, tid, seq_no, buf_size, sta_id);
1131
1132 switch (action) {
1133 case IEEE80211_AMPDU_RX_START:
1134 status = rsi_send_aggregation_params_frame(common,
1135 tid,
1136 seq_no,
1137 buf_size,
1138 STA_RX_ADDBA_DONE,
1139 sta_id);
1140 break;
1141
1142 case IEEE80211_AMPDU_RX_STOP:
1143 status = rsi_send_aggregation_params_frame(common,
1144 tid,
1145 0,
1146 buf_size,
1147 STA_RX_DELBA,
1148 sta_id);
1149 break;
1150
1151 case IEEE80211_AMPDU_TX_START:
1152 if ((vif->type == NL80211_IFTYPE_STATION) ||
1153 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1154 common->vif_info[ii].seq_start = seq_no;
1155 else if ((vif->type == NL80211_IFTYPE_AP) ||
1156 (vif->type == NL80211_IFTYPE_P2P_GO))
1157 rsta->seq_start[tid] = seq_no;
1158 status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1159 break;
1160
1161 case IEEE80211_AMPDU_TX_STOP_CONT:
1162 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1163 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1164 status = rsi_send_aggregation_params_frame(common,
1165 tid,
1166 seq_no,
1167 buf_size,
1168 STA_TX_DELBA,
1169 sta_id);
1170 if (!status)
1171 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1172 break;
1173
1174 case IEEE80211_AMPDU_TX_OPERATIONAL:
1175 if ((vif->type == NL80211_IFTYPE_STATION) ||
1176 (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1177 seq_start = common->vif_info[ii].seq_start;
1178 else if ((vif->type == NL80211_IFTYPE_AP) ||
1179 (vif->type == NL80211_IFTYPE_P2P_GO))
1180 seq_start = rsta->seq_start[tid];
1181 status = rsi_send_aggregation_params_frame(common,
1182 tid,
1183 seq_start,
1184 buf_size,
1185 STA_TX_ADDBA_DONE,
1186 sta_id);
1187 break;
1188
1189 default:
1190 rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1191 break;
1192 }
1193
1194 unlock:
1195 mutex_unlock(&common->mutex);
1196 return status;
1197 }
1198
1199 /**
1200 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1201 * @hw: Pointer to the ieee80211_hw structure.
1202 * @value: Rts threshold value.
1203 *
1204 * Return: 0 on success.
1205 */
rsi_mac80211_set_rts_threshold(struct ieee80211_hw * hw,u32 value)1206 static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1207 u32 value)
1208 {
1209 struct rsi_hw *adapter = hw->priv;
1210 struct rsi_common *common = adapter->priv;
1211
1212 mutex_lock(&common->mutex);
1213 common->rts_threshold = value;
1214 mutex_unlock(&common->mutex);
1215
1216 return 0;
1217 }
1218
1219 /**
1220 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1221 * @hw: Pointer to the ieee80211_hw structure
1222 * @vif: Pointer to the ieee80211_vif structure.
1223 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1224 *
1225 * Return: 0 on success.
1226 */
rsi_mac80211_set_rate_mask(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const struct cfg80211_bitrate_mask * mask)1227 static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1228 struct ieee80211_vif *vif,
1229 const struct cfg80211_bitrate_mask *mask)
1230 {
1231 struct rsi_hw *adapter = hw->priv;
1232 struct rsi_common *common = adapter->priv;
1233 enum nl80211_band band = hw->conf.chandef.chan->band;
1234
1235 mutex_lock(&common->mutex);
1236 common->fixedrate_mask[band] = 0;
1237
1238 if (mask->control[band].legacy == 0xfff) {
1239 common->fixedrate_mask[band] =
1240 (mask->control[band].ht_mcs[0] << 12);
1241 } else {
1242 common->fixedrate_mask[band] =
1243 mask->control[band].legacy;
1244 }
1245 mutex_unlock(&common->mutex);
1246
1247 return 0;
1248 }
1249
1250 /**
1251 * rsi_perform_cqm() - This function performs cqm.
1252 * @common: Pointer to the driver private structure.
1253 * @bssid: pointer to the bssid.
1254 * @rssi: RSSI value.
1255 * @vif: Pointer to the ieee80211_vif structure.
1256 */
rsi_perform_cqm(struct rsi_common * common,u8 * bssid,s8 rssi,struct ieee80211_vif * vif)1257 static void rsi_perform_cqm(struct rsi_common *common,
1258 u8 *bssid,
1259 s8 rssi,
1260 struct ieee80211_vif *vif)
1261 {
1262 s8 last_event = common->cqm_info.last_cqm_event_rssi;
1263 int thold = common->cqm_info.rssi_thold;
1264 u32 hyst = common->cqm_info.rssi_hyst;
1265 enum nl80211_cqm_rssi_threshold_event event;
1266
1267 if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1268 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1269 else if (rssi > thold &&
1270 (last_event == 0 || rssi > (last_event + hyst)))
1271 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1272 else
1273 return;
1274
1275 common->cqm_info.last_cqm_event_rssi = rssi;
1276 rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1277 ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1278
1279 return;
1280 }
1281
1282 /**
1283 * rsi_fill_rx_status() - This function fills rx status in
1284 * ieee80211_rx_status structure.
1285 * @hw: Pointer to the ieee80211_hw structure.
1286 * @skb: Pointer to the socket buffer structure.
1287 * @common: Pointer to the driver private structure.
1288 * @rxs: Pointer to the ieee80211_rx_status structure.
1289 *
1290 * Return: None.
1291 */
rsi_fill_rx_status(struct ieee80211_hw * hw,struct sk_buff * skb,struct rsi_common * common,struct ieee80211_rx_status * rxs)1292 static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1293 struct sk_buff *skb,
1294 struct rsi_common *common,
1295 struct ieee80211_rx_status *rxs)
1296 {
1297 struct rsi_hw *adapter = common->priv;
1298 struct ieee80211_vif *vif;
1299 struct ieee80211_bss_conf *bss = NULL;
1300 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1301 struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1302 struct ieee80211_hdr *hdr;
1303 char rssi = rx_params->rssi;
1304 u8 hdrlen = 0;
1305 u8 channel = rx_params->channel;
1306 s32 freq;
1307 int i;
1308
1309 hdr = ((struct ieee80211_hdr *)(skb->data));
1310 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1311
1312 memset(info, 0, sizeof(struct ieee80211_tx_info));
1313
1314 rxs->signal = -(rssi);
1315
1316 rxs->band = common->band;
1317
1318 freq = ieee80211_channel_to_frequency(channel, rxs->band);
1319
1320 if (freq)
1321 rxs->freq = freq;
1322
1323 if (ieee80211_has_protected(hdr->frame_control)) {
1324 if (rsi_is_cipher_wep(common)) {
1325 memmove(skb->data + 4, skb->data, hdrlen);
1326 skb_pull(skb, 4);
1327 } else {
1328 memmove(skb->data + 8, skb->data, hdrlen);
1329 skb_pull(skb, 8);
1330 rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1331 }
1332 rxs->flag |= RX_FLAG_DECRYPTED;
1333 rxs->flag |= RX_FLAG_IV_STRIPPED;
1334 }
1335
1336 for (i = 0; i < RSI_MAX_VIFS; i++) {
1337 vif = adapter->vifs[i];
1338 if (!vif)
1339 continue;
1340 if (vif->type == NL80211_IFTYPE_STATION) {
1341 bss = &vif->bss_conf;
1342 break;
1343 }
1344 }
1345 if (!bss)
1346 return;
1347 /* CQM only for connected AP beacons, the RSSI is a weighted avg */
1348 if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1349 if (ieee80211_is_beacon(hdr->frame_control))
1350 rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1351 }
1352
1353 return;
1354 }
1355
1356 /**
1357 * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1358 * @common: Pointer to the driver private structure.
1359 * @skb: Pointer to the socket buffer structure.
1360 *
1361 * Return: None.
1362 */
rsi_indicate_pkt_to_os(struct rsi_common * common,struct sk_buff * skb)1363 void rsi_indicate_pkt_to_os(struct rsi_common *common,
1364 struct sk_buff *skb)
1365 {
1366 struct rsi_hw *adapter = common->priv;
1367 struct ieee80211_hw *hw = adapter->hw;
1368 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1369
1370 if ((common->iface_down) || (!adapter->sc_nvifs)) {
1371 dev_kfree_skb(skb);
1372 return;
1373 }
1374
1375 /* filling in the ieee80211_rx_status flags */
1376 rsi_fill_rx_status(hw, skb, common, rx_status);
1377
1378 ieee80211_rx_irqsafe(hw, skb);
1379 }
1380
rsi_set_min_rate(struct ieee80211_hw * hw,struct ieee80211_sta * sta,struct rsi_common * common)1381 static void rsi_set_min_rate(struct ieee80211_hw *hw,
1382 struct ieee80211_sta *sta,
1383 struct rsi_common *common)
1384 {
1385 u8 band = hw->conf.chandef.chan->band;
1386 u8 ii;
1387 u32 rate_bitmap;
1388 bool matched = false;
1389
1390 common->bitrate_mask[band] = sta->supp_rates[band];
1391
1392 rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
1393
1394 if (rate_bitmap & 0xfff) {
1395 /* Find out the min rate */
1396 for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
1397 if (rate_bitmap & BIT(ii)) {
1398 common->min_rate = rsi_rates[ii].hw_value;
1399 matched = true;
1400 break;
1401 }
1402 }
1403 }
1404
1405 common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
1406
1407 if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
1408 for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
1409 if ((rate_bitmap >> 12) & BIT(ii)) {
1410 common->min_rate = rsi_mcsrates[ii];
1411 matched = true;
1412 break;
1413 }
1414 }
1415 }
1416
1417 if (!matched)
1418 common->min_rate = 0xffff;
1419 }
1420
1421 /**
1422 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1423 * connected.
1424 * @hw: pointer to the ieee80211_hw structure.
1425 * @vif: Pointer to the ieee80211_vif structure.
1426 * @sta: Pointer to the ieee80211_sta structure.
1427 *
1428 * Return: 0 on success, negative error codes on failure.
1429 */
rsi_mac80211_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1430 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1431 struct ieee80211_vif *vif,
1432 struct ieee80211_sta *sta)
1433 {
1434 struct rsi_hw *adapter = hw->priv;
1435 struct rsi_common *common = adapter->priv;
1436 bool sta_exist = false;
1437 struct rsi_sta *rsta;
1438 int status = 0;
1439
1440 rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1441
1442 mutex_lock(&common->mutex);
1443
1444 if ((vif->type == NL80211_IFTYPE_AP) ||
1445 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1446 u8 cnt;
1447 int sta_idx = -1;
1448 int free_index = -1;
1449
1450 /* Check if max stations reached */
1451 if (common->num_stations >= common->max_stations) {
1452 rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1453 status = -EOPNOTSUPP;
1454 goto unlock;
1455 }
1456 for (cnt = 0; cnt < common->max_stations; cnt++) {
1457 rsta = &common->stations[cnt];
1458
1459 if (!rsta->sta) {
1460 if (free_index < 0)
1461 free_index = cnt;
1462 continue;
1463 }
1464 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1465 rsi_dbg(INFO_ZONE, "Station exists\n");
1466 sta_idx = cnt;
1467 sta_exist = true;
1468 break;
1469 }
1470 }
1471 if (!sta_exist) {
1472 if (free_index >= 0)
1473 sta_idx = free_index;
1474 }
1475 if (sta_idx < 0) {
1476 rsi_dbg(ERR_ZONE,
1477 "%s: Some problem reaching here...\n",
1478 __func__);
1479 status = -EINVAL;
1480 goto unlock;
1481 }
1482 rsta = &common->stations[sta_idx];
1483 rsta->sta = sta;
1484 rsta->sta_id = sta_idx;
1485 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1486 rsta->start_tx_aggr[cnt] = false;
1487 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1488 rsta->seq_start[cnt] = 0;
1489 if (!sta_exist) {
1490 rsi_dbg(INFO_ZONE, "New Station\n");
1491
1492 /* Send peer notify to device */
1493 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1494 rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1495 sta->addr, sta->wme, sta->aid,
1496 sta, sta_idx, 0, vif);
1497
1498 if (common->key) {
1499 struct ieee80211_key_conf *key = common->key;
1500
1501 if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1502 (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1503 rsi_hal_load_key(adapter->priv,
1504 key->key,
1505 key->keylen,
1506 RSI_PAIRWISE_KEY,
1507 key->keyidx,
1508 key->cipher,
1509 sta_idx,
1510 vif);
1511 }
1512
1513 common->num_stations++;
1514 }
1515 }
1516
1517 if ((vif->type == NL80211_IFTYPE_STATION) ||
1518 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1519 rsi_set_min_rate(hw, sta, common);
1520 if (sta->ht_cap.ht_supported) {
1521 common->vif_info[0].is_ht = true;
1522 common->bitrate_mask[NL80211_BAND_2GHZ] =
1523 sta->supp_rates[NL80211_BAND_2GHZ];
1524 if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1525 (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1526 common->vif_info[0].sgi = true;
1527 ieee80211_start_tx_ba_session(sta, 0, 0);
1528 }
1529 }
1530
1531 unlock:
1532 mutex_unlock(&common->mutex);
1533
1534 return status;
1535 }
1536
1537 /**
1538 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1539 * getting disconnected.
1540 * @hw: Pointer to the ieee80211_hw structure.
1541 * @vif: Pointer to the ieee80211_vif structure.
1542 * @sta: Pointer to the ieee80211_sta structure.
1543 *
1544 * Return: 0 on success, negative error codes on failure.
1545 */
rsi_mac80211_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1546 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1547 struct ieee80211_vif *vif,
1548 struct ieee80211_sta *sta)
1549 {
1550 struct rsi_hw *adapter = hw->priv;
1551 struct rsi_common *common = adapter->priv;
1552 struct ieee80211_bss_conf *bss = &vif->bss_conf;
1553 struct rsi_sta *rsta;
1554
1555 rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1556
1557 mutex_lock(&common->mutex);
1558
1559 if ((vif->type == NL80211_IFTYPE_AP) ||
1560 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1561 u8 sta_idx, cnt;
1562
1563 /* Send peer notify to device */
1564 rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1565 for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1566 rsta = &common->stations[sta_idx];
1567
1568 if (!rsta->sta)
1569 continue;
1570 if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1571 rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1572 sta->addr, sta->wme,
1573 sta->aid, sta, sta_idx,
1574 0, vif);
1575 rsta->sta = NULL;
1576 rsta->sta_id = -1;
1577 for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1578 rsta->start_tx_aggr[cnt] = false;
1579 if (common->num_stations > 0)
1580 common->num_stations--;
1581 break;
1582 }
1583 }
1584 if (sta_idx >= common->max_stations)
1585 rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1586 }
1587
1588 if ((vif->type == NL80211_IFTYPE_STATION) ||
1589 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1590 /* Resetting all the fields to default values */
1591 memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1592 bss->qos = sta->wme;
1593 common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1594 common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1595 common->min_rate = 0xffff;
1596 common->vif_info[0].is_ht = false;
1597 common->vif_info[0].sgi = false;
1598 common->vif_info[0].seq_start = 0;
1599 common->secinfo.ptk_cipher = 0;
1600 common->secinfo.gtk_cipher = 0;
1601 if (!common->iface_down)
1602 rsi_send_rx_filter_frame(common, 0);
1603 }
1604 mutex_unlock(&common->mutex);
1605
1606 return 0;
1607 }
1608
1609 /**
1610 * rsi_mac80211_set_antenna() - This function is used to configure
1611 * tx and rx antennas.
1612 * @hw: Pointer to the ieee80211_hw structure.
1613 * @tx_ant: Bitmap for tx antenna
1614 * @rx_ant: Bitmap for rx antenna
1615 *
1616 * Return: 0 on success, Negative error code on failure.
1617 */
rsi_mac80211_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)1618 static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1619 u32 tx_ant, u32 rx_ant)
1620 {
1621 struct rsi_hw *adapter = hw->priv;
1622 struct rsi_common *common = adapter->priv;
1623 u8 antenna = 0;
1624
1625 if (tx_ant > 1 || rx_ant > 1) {
1626 rsi_dbg(ERR_ZONE,
1627 "Invalid antenna selection (tx: %d, rx:%d)\n",
1628 tx_ant, rx_ant);
1629 rsi_dbg(ERR_ZONE,
1630 "Use 0 for int_ant, 1 for ext_ant\n");
1631 return -EINVAL;
1632 }
1633
1634 rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1635 __func__, tx_ant, rx_ant);
1636
1637 mutex_lock(&common->mutex);
1638
1639 antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1640 if (common->ant_in_use != antenna)
1641 if (rsi_set_antenna(common, antenna))
1642 goto fail_set_antenna;
1643
1644 rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1645 tx_ant ? "UFL" : "INT");
1646
1647 common->ant_in_use = antenna;
1648
1649 mutex_unlock(&common->mutex);
1650
1651 return 0;
1652
1653 fail_set_antenna:
1654 rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1655 mutex_unlock(&common->mutex);
1656 return -EINVAL;
1657 }
1658
1659 /**
1660 * rsi_mac80211_get_antenna() - This function is used to configure
1661 * tx and rx antennas.
1662 *
1663 * @hw: Pointer to the ieee80211_hw structure.
1664 * @tx_ant: Bitmap for tx antenna
1665 * @rx_ant: Bitmap for rx antenna
1666 *
1667 * Return: 0 on success, negative error codes on failure.
1668 */
rsi_mac80211_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)1669 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1670 u32 *tx_ant, u32 *rx_ant)
1671 {
1672 struct rsi_hw *adapter = hw->priv;
1673 struct rsi_common *common = adapter->priv;
1674
1675 mutex_lock(&common->mutex);
1676
1677 *tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1678 *rx_ant = 0;
1679
1680 mutex_unlock(&common->mutex);
1681
1682 return 0;
1683 }
1684
rsi_map_region_code(enum nl80211_dfs_regions region_code)1685 static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1686 {
1687 switch (region_code) {
1688 case NL80211_DFS_FCC:
1689 return RSI_REGION_FCC;
1690 case NL80211_DFS_ETSI:
1691 return RSI_REGION_ETSI;
1692 case NL80211_DFS_JP:
1693 return RSI_REGION_TELEC;
1694 case NL80211_DFS_UNSET:
1695 return RSI_REGION_WORLD;
1696 }
1697 return RSI_REGION_WORLD;
1698 }
1699
rsi_reg_notify(struct wiphy * wiphy,struct regulatory_request * request)1700 static void rsi_reg_notify(struct wiphy *wiphy,
1701 struct regulatory_request *request)
1702 {
1703 struct ieee80211_supported_band *sband;
1704 struct ieee80211_channel *ch;
1705 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1706 struct rsi_hw * adapter = hw->priv;
1707 struct rsi_common *common = adapter->priv;
1708 int i;
1709
1710 mutex_lock(&common->mutex);
1711
1712 rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1713 request->alpha2, request->dfs_region);
1714
1715 if (common->num_supp_bands > 1) {
1716 sband = wiphy->bands[NL80211_BAND_5GHZ];
1717
1718 for (i = 0; i < sband->n_channels; i++) {
1719 ch = &sband->channels[i];
1720 if (ch->flags & IEEE80211_CHAN_DISABLED)
1721 continue;
1722
1723 if (ch->flags & IEEE80211_CHAN_RADAR)
1724 ch->flags |= IEEE80211_CHAN_NO_IR;
1725 }
1726 }
1727 adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1728 rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1729
1730 adapter->country[0] = request->alpha2[0];
1731 adapter->country[1] = request->alpha2[1];
1732
1733 mutex_unlock(&common->mutex);
1734 }
1735
rsi_mac80211_rfkill_poll(struct ieee80211_hw * hw)1736 static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1737 {
1738 struct rsi_hw *adapter = hw->priv;
1739 struct rsi_common *common = adapter->priv;
1740
1741 mutex_lock(&common->mutex);
1742 if (common->fsm_state != FSM_MAC_INIT_DONE)
1743 wiphy_rfkill_set_hw_state(hw->wiphy, true);
1744 else
1745 wiphy_rfkill_set_hw_state(hw->wiphy, false);
1746 mutex_unlock(&common->mutex);
1747 }
1748
rsi_resume_conn_channel(struct rsi_common * common)1749 static void rsi_resume_conn_channel(struct rsi_common *common)
1750 {
1751 struct rsi_hw *adapter = common->priv;
1752 struct ieee80211_vif *vif;
1753 int cnt;
1754
1755 for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1756 vif = adapter->vifs[cnt];
1757 if (!vif)
1758 continue;
1759
1760 if ((vif->type == NL80211_IFTYPE_AP) ||
1761 (vif->type == NL80211_IFTYPE_P2P_GO)) {
1762 rsi_switch_channel(adapter, vif);
1763 break;
1764 }
1765 if (((vif->type == NL80211_IFTYPE_STATION) ||
1766 (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1767 vif->bss_conf.assoc) {
1768 rsi_switch_channel(adapter, vif);
1769 break;
1770 }
1771 }
1772 }
1773
rsi_roc_timeout(struct timer_list * t)1774 void rsi_roc_timeout(struct timer_list *t)
1775 {
1776 struct rsi_common *common = from_timer(common, t, roc_timer);
1777
1778 rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1779
1780 mutex_lock(&common->mutex);
1781 ieee80211_remain_on_channel_expired(common->priv->hw);
1782
1783 if (timer_pending(&common->roc_timer))
1784 del_timer(&common->roc_timer);
1785
1786 rsi_resume_conn_channel(common);
1787 mutex_unlock(&common->mutex);
1788 }
1789
rsi_mac80211_roc(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel * chan,int duration,enum ieee80211_roc_type type)1790 static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1791 struct ieee80211_channel *chan, int duration,
1792 enum ieee80211_roc_type type)
1793 {
1794 struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
1795 struct rsi_common *common = (struct rsi_common *)adapter->priv;
1796 int status = 0;
1797
1798 rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1799
1800 mutex_lock(&common->mutex);
1801 rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1802 __func__, chan->hw_value, duration);
1803
1804 if (timer_pending(&common->roc_timer)) {
1805 rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1806 del_timer(&common->roc_timer);
1807 }
1808 common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1809 add_timer(&common->roc_timer);
1810
1811 /* Configure band */
1812 if (rsi_band_check(common, chan)) {
1813 rsi_dbg(ERR_ZONE, "Failed to set band\n");
1814 status = -EINVAL;
1815 goto out;
1816 }
1817
1818 /* Configure channel */
1819 if (rsi_set_channel(common, chan)) {
1820 rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1821 status = -EINVAL;
1822 goto out;
1823 }
1824
1825 common->roc_vif = vif;
1826 ieee80211_ready_on_channel(hw);
1827 rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1828 __func__, chan->hw_value);
1829
1830 out:
1831 mutex_unlock(&common->mutex);
1832
1833 return status;
1834 }
1835
rsi_mac80211_cancel_roc(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1836 static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1837 struct ieee80211_vif *vif)
1838 {
1839 struct rsi_hw *adapter = hw->priv;
1840 struct rsi_common *common = adapter->priv;
1841
1842 rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1843
1844 mutex_lock(&common->mutex);
1845 if (!timer_pending(&common->roc_timer)) {
1846 mutex_unlock(&common->mutex);
1847 return 0;
1848 }
1849
1850 del_timer(&common->roc_timer);
1851
1852 rsi_resume_conn_channel(common);
1853 mutex_unlock(&common->mutex);
1854
1855 return 0;
1856 }
1857
1858 #ifdef CONFIG_PM
1859 static const struct wiphy_wowlan_support rsi_wowlan_support = {
1860 .flags = WIPHY_WOWLAN_ANY |
1861 WIPHY_WOWLAN_MAGIC_PKT |
1862 WIPHY_WOWLAN_DISCONNECT |
1863 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
1864 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1865 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
1866 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1867 };
1868
rsi_wow_map_triggers(struct rsi_common * common,struct cfg80211_wowlan * wowlan)1869 static u16 rsi_wow_map_triggers(struct rsi_common *common,
1870 struct cfg80211_wowlan *wowlan)
1871 {
1872 u16 wow_triggers = 0;
1873
1874 rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1875
1876 if (wowlan->any)
1877 wow_triggers |= RSI_WOW_ANY;
1878 if (wowlan->magic_pkt)
1879 wow_triggers |= RSI_WOW_MAGIC_PKT;
1880 if (wowlan->disconnect)
1881 wow_triggers |= RSI_WOW_DISCONNECT;
1882 if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1883 wowlan->four_way_handshake)
1884 wow_triggers |= RSI_WOW_GTK_REKEY;
1885
1886 return wow_triggers;
1887 }
1888
rsi_config_wowlan(struct rsi_hw * adapter,struct cfg80211_wowlan * wowlan)1889 int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1890 {
1891 struct rsi_common *common = adapter->priv;
1892 u16 triggers = 0;
1893 u16 rx_filter_word = 0;
1894 struct ieee80211_bss_conf *bss = NULL;
1895
1896 rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1897
1898 if (!adapter->vifs[0])
1899 return -EINVAL;
1900
1901 bss = &adapter->vifs[0]->bss_conf;
1902
1903 if (WARN_ON(!wowlan)) {
1904 rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1905 return -EINVAL;
1906 }
1907
1908 common->wow_flags |= RSI_WOW_ENABLED;
1909 triggers = rsi_wow_map_triggers(common, wowlan);
1910 if (!triggers) {
1911 rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1912 return -EINVAL;
1913 }
1914 if (!bss->assoc) {
1915 rsi_dbg(ERR_ZONE,
1916 "Cannot configure WoWLAN (Station not connected)\n");
1917 common->wow_flags |= RSI_WOW_NO_CONNECTION;
1918 return 0;
1919 }
1920 rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1921
1922 if (common->coex_mode > 1)
1923 rsi_disable_ps(adapter, adapter->vifs[0]);
1924
1925 rsi_send_wowlan_request(common, triggers, 1);
1926
1927 /**
1928 * Increase the beacon_miss threshold & keep-alive timers in
1929 * vap_update frame
1930 */
1931 rsi_send_vap_dynamic_update(common);
1932
1933 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1934 rsi_send_rx_filter_frame(common, rx_filter_word);
1935
1936 return 0;
1937 }
1938 EXPORT_SYMBOL(rsi_config_wowlan);
1939
rsi_mac80211_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)1940 static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1941 struct cfg80211_wowlan *wowlan)
1942 {
1943 struct rsi_hw *adapter = hw->priv;
1944 struct rsi_common *common = adapter->priv;
1945
1946 rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1947 mutex_lock(&common->mutex);
1948 if (rsi_config_wowlan(adapter, wowlan)) {
1949 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1950 mutex_unlock(&common->mutex);
1951 return 1;
1952 }
1953 mutex_unlock(&common->mutex);
1954
1955 return 0;
1956 }
1957
rsi_mac80211_resume(struct ieee80211_hw * hw)1958 static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1959 {
1960 u16 rx_filter_word = 0;
1961 struct rsi_hw *adapter = hw->priv;
1962 struct rsi_common *common = adapter->priv;
1963
1964 common->wow_flags = 0;
1965
1966 rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1967
1968 if (common->hibernate_resume) {
1969 common->mac_ops_resumed = true;
1970 /* Device need a complete restart of all MAC operations.
1971 * returning 1 will serve this purpose.
1972 */
1973 return 1;
1974 }
1975
1976 mutex_lock(&common->mutex);
1977 rsi_send_wowlan_request(common, 0, 0);
1978
1979 rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1980 ALLOW_MGMT_ASSOC_PEER);
1981 rsi_send_rx_filter_frame(common, rx_filter_word);
1982 mutex_unlock(&common->mutex);
1983
1984 return 0;
1985 }
1986
1987 #endif
1988
1989 static const struct ieee80211_ops mac80211_ops = {
1990 .tx = rsi_mac80211_tx,
1991 .start = rsi_mac80211_start,
1992 .stop = rsi_mac80211_stop,
1993 .add_interface = rsi_mac80211_add_interface,
1994 .remove_interface = rsi_mac80211_remove_interface,
1995 .config = rsi_mac80211_config,
1996 .bss_info_changed = rsi_mac80211_bss_info_changed,
1997 .conf_tx = rsi_mac80211_conf_tx,
1998 .configure_filter = rsi_mac80211_conf_filter,
1999 .set_key = rsi_mac80211_set_key,
2000 .set_rts_threshold = rsi_mac80211_set_rts_threshold,
2001 .set_bitrate_mask = rsi_mac80211_set_rate_mask,
2002 .ampdu_action = rsi_mac80211_ampdu_action,
2003 .sta_add = rsi_mac80211_sta_add,
2004 .sta_remove = rsi_mac80211_sta_remove,
2005 .set_antenna = rsi_mac80211_set_antenna,
2006 .get_antenna = rsi_mac80211_get_antenna,
2007 .rfkill_poll = rsi_mac80211_rfkill_poll,
2008 .remain_on_channel = rsi_mac80211_roc,
2009 .cancel_remain_on_channel = rsi_mac80211_cancel_roc,
2010 #ifdef CONFIG_PM
2011 .suspend = rsi_mac80211_suspend,
2012 .resume = rsi_mac80211_resume,
2013 #endif
2014 .hw_scan = rsi_mac80211_hw_scan_start,
2015 .cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
2016 };
2017
2018 /**
2019 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
2020 * @common: Pointer to the driver private structure.
2021 *
2022 * Return: 0 on success, negative error codes on failure.
2023 */
rsi_mac80211_attach(struct rsi_common * common)2024 int rsi_mac80211_attach(struct rsi_common *common)
2025 {
2026 int status = 0;
2027 struct ieee80211_hw *hw = NULL;
2028 struct wiphy *wiphy = NULL;
2029 struct rsi_hw *adapter = common->priv;
2030 u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2031
2032 rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2033
2034 hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2035 if (!hw) {
2036 rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2037 return -ENOMEM;
2038 }
2039
2040 wiphy = hw->wiphy;
2041
2042 SET_IEEE80211_DEV(hw, adapter->device);
2043
2044 hw->priv = adapter;
2045 adapter->hw = hw;
2046
2047 ieee80211_hw_set(hw, SIGNAL_DBM);
2048 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2049 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2050 ieee80211_hw_set(hw, SUPPORTS_PS);
2051 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2052
2053 hw->queues = MAX_HW_QUEUES;
2054 hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2055
2056 hw->max_rates = 1;
2057 hw->max_rate_tries = MAX_RETRIES;
2058 hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2059 hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2060
2061 hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2062 hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2063 hw->rate_control_algorithm = "AARF";
2064
2065 SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2066 ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2067
2068 wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2069 BIT(NL80211_IFTYPE_AP) |
2070 BIT(NL80211_IFTYPE_P2P_DEVICE) |
2071 BIT(NL80211_IFTYPE_P2P_CLIENT) |
2072 BIT(NL80211_IFTYPE_P2P_GO);
2073
2074 wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2075 wiphy->retry_short = RETRY_SHORT;
2076 wiphy->retry_long = RETRY_LONG;
2077 wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2078 wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2079 wiphy->flags = 0;
2080
2081 wiphy->available_antennas_rx = 1;
2082 wiphy->available_antennas_tx = 1;
2083
2084 status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2085 if (status)
2086 return status;
2087 wiphy->bands[NL80211_BAND_2GHZ] =
2088 &adapter->sbands[NL80211_BAND_2GHZ];
2089 if (common->num_supp_bands > 1) {
2090 status = rsi_register_rates_channels(adapter,
2091 NL80211_BAND_5GHZ);
2092 if (status)
2093 return status;
2094 wiphy->bands[NL80211_BAND_5GHZ] =
2095 &adapter->sbands[NL80211_BAND_5GHZ];
2096 }
2097
2098 /* AP Parameters */
2099 wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2100 common->max_stations = wiphy->max_ap_assoc_sta;
2101 rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2102 hw->sta_data_size = sizeof(struct rsi_sta);
2103
2104 wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2105 wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2106 wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2107 wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2108 wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2109 wiphy->reg_notifier = rsi_reg_notify;
2110
2111 #ifdef CONFIG_PM
2112 wiphy->wowlan = &rsi_wowlan_support;
2113 #endif
2114
2115 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2116
2117 /* Wi-Fi direct parameters */
2118 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2119 wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2120 wiphy->max_remain_on_channel_duration = 10000;
2121 hw->max_listen_interval = 10;
2122 wiphy->iface_combinations = rsi_iface_combinations;
2123 wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2124
2125 if (common->coex_mode > 1)
2126 wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2127
2128 status = ieee80211_register_hw(hw);
2129 if (status)
2130 return status;
2131
2132 return rsi_init_dbgfs(adapter);
2133 }
2134
