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