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