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