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iwlwifi: rename ibss_beacon variable
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h" /* FIXME: remove */
38 #include "iwl-debug.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41 #include "iwl-power.h"
42 #include "iwl-sta.h"
43 #include "iwl-helpers.h"
44
45
46 MODULE_DESCRIPTION("iwl core");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
50
51 /*
52 * set bt_coex_active to true, uCode will do kill/defer
53 * every time the priority line is asserted (BT is sending signals on the
54 * priority line in the PCIx).
55 * set bt_coex_active to false, uCode will ignore the BT activity and
56 * perform the normal operation
57 *
58 * User might experience transmit issue on some platform due to WiFi/BT
59 * co-exist problem. The possible behaviors are:
60 * Able to scan and finding all the available AP
61 * Not able to associate with any AP
62 * On those platforms, WiFi communication can be restored by set
63 * "bt_coex_active" module parameter to "false"
64 *
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
66 */
67 bool bt_coex_active = true;
68 EXPORT_SYMBOL_GPL(bt_coex_active);
69 module_param(bt_coex_active, bool, S_IRUGO);
70 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
71
72 u32 iwl_debug_level;
73 EXPORT_SYMBOL(iwl_debug_level);
74
75 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
76 EXPORT_SYMBOL(iwl_bcast_addr);
77
78
79 /* This function both allocates and initializes hw and priv. */
80 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
81 struct ieee80211_ops *hw_ops)
82 {
83 struct iwl_priv *priv;
84
85 /* mac80211 allocates memory for this device instance, including
86 * space for this driver's private structure */
87 struct ieee80211_hw *hw =
88 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
89 if (hw == NULL) {
90 pr_err("%s: Can not allocate network device\n",
91 cfg->name);
92 goto out;
93 }
94
95 priv = hw->priv;
96 priv->hw = hw;
97
98 out:
99 return hw;
100 }
101 EXPORT_SYMBOL(iwl_alloc_all);
102
103 /*
104 * QoS support
105 */
106 static void iwl_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
107 {
108 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
109 return;
110
111 if (!ctx->is_active)
112 return;
113
114 ctx->qos_data.def_qos_parm.qos_flags = 0;
115
116 if (ctx->qos_data.qos_active)
117 ctx->qos_data.def_qos_parm.qos_flags |=
118 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
119
120 if (ctx->ht.enabled)
121 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
122
123 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
124 ctx->qos_data.qos_active,
125 ctx->qos_data.def_qos_parm.qos_flags);
126
127 iwl_send_cmd_pdu_async(priv, ctx->qos_cmd,
128 sizeof(struct iwl_qosparam_cmd),
129 &ctx->qos_data.def_qos_parm, NULL);
130 }
131
132 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
133 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
134 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
135 struct ieee80211_sta_ht_cap *ht_info,
136 enum ieee80211_band band)
137 {
138 u16 max_bit_rate = 0;
139 u8 rx_chains_num = priv->hw_params.rx_chains_num;
140 u8 tx_chains_num = priv->hw_params.tx_chains_num;
141
142 ht_info->cap = 0;
143 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
144
145 ht_info->ht_supported = true;
146
147 if (priv->cfg->ht_params &&
148 priv->cfg->ht_params->ht_greenfield_support)
149 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
150 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
151 max_bit_rate = MAX_BIT_RATE_20_MHZ;
152 if (priv->hw_params.ht40_channel & BIT(band)) {
153 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
154 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
155 ht_info->mcs.rx_mask[4] = 0x01;
156 max_bit_rate = MAX_BIT_RATE_40_MHZ;
157 }
158
159 if (priv->cfg->mod_params->amsdu_size_8K)
160 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
161
162 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
163 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
164 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
165 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
166 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
167 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
168
169 ht_info->mcs.rx_mask[0] = 0xFF;
170 if (rx_chains_num >= 2)
171 ht_info->mcs.rx_mask[1] = 0xFF;
172 if (rx_chains_num >= 3)
173 ht_info->mcs.rx_mask[2] = 0xFF;
174
175 /* Highest supported Rx data rate */
176 max_bit_rate *= rx_chains_num;
177 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
178 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
179
180 /* Tx MCS capabilities */
181 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
182 if (tx_chains_num != rx_chains_num) {
183 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
184 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
185 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
186 }
187 }
188
189 /**
190 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
191 */
192 int iwlcore_init_geos(struct iwl_priv *priv)
193 {
194 struct iwl_channel_info *ch;
195 struct ieee80211_supported_band *sband;
196 struct ieee80211_channel *channels;
197 struct ieee80211_channel *geo_ch;
198 struct ieee80211_rate *rates;
199 int i = 0;
200
201 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
202 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
203 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
204 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
205 return 0;
206 }
207
208 channels = kzalloc(sizeof(struct ieee80211_channel) *
209 priv->channel_count, GFP_KERNEL);
210 if (!channels)
211 return -ENOMEM;
212
213 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
214 GFP_KERNEL);
215 if (!rates) {
216 kfree(channels);
217 return -ENOMEM;
218 }
219
220 /* 5.2GHz channels start after the 2.4GHz channels */
221 sband = &priv->bands[IEEE80211_BAND_5GHZ];
222 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
223 /* just OFDM */
224 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
225 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
226
227 if (priv->cfg->sku & IWL_SKU_N)
228 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
229 IEEE80211_BAND_5GHZ);
230
231 sband = &priv->bands[IEEE80211_BAND_2GHZ];
232 sband->channels = channels;
233 /* OFDM & CCK */
234 sband->bitrates = rates;
235 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
236
237 if (priv->cfg->sku & IWL_SKU_N)
238 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
239 IEEE80211_BAND_2GHZ);
240
241 priv->ieee_channels = channels;
242 priv->ieee_rates = rates;
243
244 for (i = 0; i < priv->channel_count; i++) {
245 ch = &priv->channel_info[i];
246
247 /* FIXME: might be removed if scan is OK */
248 if (!is_channel_valid(ch))
249 continue;
250
251 if (is_channel_a_band(ch))
252 sband = &priv->bands[IEEE80211_BAND_5GHZ];
253 else
254 sband = &priv->bands[IEEE80211_BAND_2GHZ];
255
256 geo_ch = &sband->channels[sband->n_channels++];
257
258 geo_ch->center_freq =
259 ieee80211_channel_to_frequency(ch->channel);
260 geo_ch->max_power = ch->max_power_avg;
261 geo_ch->max_antenna_gain = 0xff;
262 geo_ch->hw_value = ch->channel;
263
264 if (is_channel_valid(ch)) {
265 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
266 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
267
268 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
269 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
270
271 if (ch->flags & EEPROM_CHANNEL_RADAR)
272 geo_ch->flags |= IEEE80211_CHAN_RADAR;
273
274 geo_ch->flags |= ch->ht40_extension_channel;
275
276 if (ch->max_power_avg > priv->tx_power_device_lmt)
277 priv->tx_power_device_lmt = ch->max_power_avg;
278 } else {
279 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
280 }
281
282 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
283 ch->channel, geo_ch->center_freq,
284 is_channel_a_band(ch) ? "5.2" : "2.4",
285 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
286 "restricted" : "valid",
287 geo_ch->flags);
288 }
289
290 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
291 priv->cfg->sku & IWL_SKU_A) {
292 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
293 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
294 priv->pci_dev->device,
295 priv->pci_dev->subsystem_device);
296 priv->cfg->sku &= ~IWL_SKU_A;
297 }
298
299 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
300 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
301 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
302
303 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
304
305 return 0;
306 }
307 EXPORT_SYMBOL(iwlcore_init_geos);
308
309 /*
310 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
311 */
312 void iwlcore_free_geos(struct iwl_priv *priv)
313 {
314 kfree(priv->ieee_channels);
315 kfree(priv->ieee_rates);
316 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
317 }
318 EXPORT_SYMBOL(iwlcore_free_geos);
319
320 /*
321 * iwlcore_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
322 * function.
323 */
324 void iwlcore_tx_cmd_protection(struct iwl_priv *priv,
325 struct ieee80211_tx_info *info,
326 __le16 fc, __le32 *tx_flags)
327 {
328 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
329 *tx_flags |= TX_CMD_FLG_RTS_MSK;
330 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
331 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
332
333 if (!ieee80211_is_mgmt(fc))
334 return;
335
336 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
337 case cpu_to_le16(IEEE80211_STYPE_AUTH):
338 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
339 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
340 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
341 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
342 *tx_flags |= TX_CMD_FLG_CTS_MSK;
343 break;
344 }
345 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
346 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
347 *tx_flags |= TX_CMD_FLG_CTS_MSK;
348 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
349 }
350 }
351 EXPORT_SYMBOL(iwlcore_tx_cmd_protection);
352
353
354 static bool iwl_is_channel_extension(struct iwl_priv *priv,
355 enum ieee80211_band band,
356 u16 channel, u8 extension_chan_offset)
357 {
358 const struct iwl_channel_info *ch_info;
359
360 ch_info = iwl_get_channel_info(priv, band, channel);
361 if (!is_channel_valid(ch_info))
362 return false;
363
364 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
365 return !(ch_info->ht40_extension_channel &
366 IEEE80211_CHAN_NO_HT40PLUS);
367 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
368 return !(ch_info->ht40_extension_channel &
369 IEEE80211_CHAN_NO_HT40MINUS);
370
371 return false;
372 }
373
374 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
375 struct iwl_rxon_context *ctx,
376 struct ieee80211_sta_ht_cap *ht_cap)
377 {
378 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
379 return false;
380
381 /*
382 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
383 * the bit will not set if it is pure 40MHz case
384 */
385 if (ht_cap && !ht_cap->ht_supported)
386 return false;
387
388 #ifdef CONFIG_IWLWIFI_DEBUGFS
389 if (priv->disable_ht40)
390 return false;
391 #endif
392
393 return iwl_is_channel_extension(priv, priv->band,
394 le16_to_cpu(ctx->staging.channel),
395 ctx->ht.extension_chan_offset);
396 }
397 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
398
399 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
400 {
401 u16 new_val;
402 u16 beacon_factor;
403
404 /*
405 * If mac80211 hasn't given us a beacon interval, program
406 * the default into the device (not checking this here
407 * would cause the adjustment below to return the maximum
408 * value, which may break PAN.)
409 */
410 if (!beacon_val)
411 return DEFAULT_BEACON_INTERVAL;
412
413 /*
414 * If the beacon interval we obtained from the peer
415 * is too large, we'll have to wake up more often
416 * (and in IBSS case, we'll beacon too much)
417 *
418 * For example, if max_beacon_val is 4096, and the
419 * requested beacon interval is 7000, we'll have to
420 * use 3500 to be able to wake up on the beacons.
421 *
422 * This could badly influence beacon detection stats.
423 */
424
425 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
426 new_val = beacon_val / beacon_factor;
427
428 if (!new_val)
429 new_val = max_beacon_val;
430
431 return new_val;
432 }
433
434 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
435 {
436 u64 tsf;
437 s32 interval_tm, rem;
438 struct ieee80211_conf *conf = NULL;
439 u16 beacon_int;
440 struct ieee80211_vif *vif = ctx->vif;
441
442 conf = ieee80211_get_hw_conf(priv->hw);
443
444 lockdep_assert_held(&priv->mutex);
445
446 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
447
448 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
449 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
450
451 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
452
453 /*
454 * TODO: For IBSS we need to get atim_window from mac80211,
455 * for now just always use 0
456 */
457 ctx->timing.atim_window = 0;
458
459 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
460 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
461 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
462 priv->contexts[IWL_RXON_CTX_BSS].vif &&
463 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
464 ctx->timing.beacon_interval =
465 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
466 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
467 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
468 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
469 priv->contexts[IWL_RXON_CTX_PAN].vif &&
470 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
471 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
472 !ctx->vif->bss_conf.beacon_int)) {
473 ctx->timing.beacon_interval =
474 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
475 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
476 } else {
477 beacon_int = iwl_adjust_beacon_interval(beacon_int,
478 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
479 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
480 }
481
482 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
483 interval_tm = beacon_int * TIME_UNIT;
484 rem = do_div(tsf, interval_tm);
485 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
486
487 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
488
489 IWL_DEBUG_ASSOC(priv,
490 "beacon interval %d beacon timer %d beacon tim %d\n",
491 le16_to_cpu(ctx->timing.beacon_interval),
492 le32_to_cpu(ctx->timing.beacon_init_val),
493 le16_to_cpu(ctx->timing.atim_window));
494
495 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
496 sizeof(ctx->timing), &ctx->timing);
497 }
498 EXPORT_SYMBOL(iwl_send_rxon_timing);
499
500 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
501 int hw_decrypt)
502 {
503 struct iwl_rxon_cmd *rxon = &ctx->staging;
504
505 if (hw_decrypt)
506 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
507 else
508 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
509
510 }
511 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
512
513 /**
514 * iwl_check_rxon_cmd - validate RXON structure is valid
515 *
516 * NOTE: This is really only useful during development and can eventually
517 * be #ifdef'd out once the driver is stable and folks aren't actively
518 * making changes
519 */
520 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
521 {
522 int error = 0;
523 int counter = 1;
524 struct iwl_rxon_cmd *rxon = &ctx->staging;
525
526 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
527 error |= le32_to_cpu(rxon->flags &
528 (RXON_FLG_TGJ_NARROW_BAND_MSK |
529 RXON_FLG_RADAR_DETECT_MSK));
530 if (error)
531 IWL_WARN(priv, "check 24G fields %d | %d\n",
532 counter++, error);
533 } else {
534 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
535 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
536 if (error)
537 IWL_WARN(priv, "check 52 fields %d | %d\n",
538 counter++, error);
539 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
540 if (error)
541 IWL_WARN(priv, "check 52 CCK %d | %d\n",
542 counter++, error);
543 }
544 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
545 if (error)
546 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
547
548 /* make sure basic rates 6Mbps and 1Mbps are supported */
549 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
550 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
551 if (error)
552 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
553
554 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
555 if (error)
556 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
557
558 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
559 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
560 if (error)
561 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
562 counter++, error);
563
564 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
565 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
566 if (error)
567 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
568 counter++, error);
569
570 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
571 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
572 if (error)
573 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
574 counter++, error);
575
576 if (error)
577 IWL_WARN(priv, "Tuning to channel %d\n",
578 le16_to_cpu(rxon->channel));
579
580 if (error) {
581 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
582 return -1;
583 }
584 return 0;
585 }
586 EXPORT_SYMBOL(iwl_check_rxon_cmd);
587
588 /**
589 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
590 * @priv: staging_rxon is compared to active_rxon
591 *
592 * If the RXON structure is changing enough to require a new tune,
593 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
594 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
595 */
596 int iwl_full_rxon_required(struct iwl_priv *priv,
597 struct iwl_rxon_context *ctx)
598 {
599 const struct iwl_rxon_cmd *staging = &ctx->staging;
600 const struct iwl_rxon_cmd *active = &ctx->active;
601
602 #define CHK(cond) \
603 if ((cond)) { \
604 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
605 return 1; \
606 }
607
608 #define CHK_NEQ(c1, c2) \
609 if ((c1) != (c2)) { \
610 IWL_DEBUG_INFO(priv, "need full RXON - " \
611 #c1 " != " #c2 " - %d != %d\n", \
612 (c1), (c2)); \
613 return 1; \
614 }
615
616 /* These items are only settable from the full RXON command */
617 CHK(!iwl_is_associated_ctx(ctx));
618 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
619 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
620 CHK(compare_ether_addr(staging->wlap_bssid_addr,
621 active->wlap_bssid_addr));
622 CHK_NEQ(staging->dev_type, active->dev_type);
623 CHK_NEQ(staging->channel, active->channel);
624 CHK_NEQ(staging->air_propagation, active->air_propagation);
625 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
626 active->ofdm_ht_single_stream_basic_rates);
627 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
628 active->ofdm_ht_dual_stream_basic_rates);
629 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
630 active->ofdm_ht_triple_stream_basic_rates);
631 CHK_NEQ(staging->assoc_id, active->assoc_id);
632
633 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
634 * be updated with the RXON_ASSOC command -- however only some
635 * flag transitions are allowed using RXON_ASSOC */
636
637 /* Check if we are not switching bands */
638 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
639 active->flags & RXON_FLG_BAND_24G_MSK);
640
641 /* Check if we are switching association toggle */
642 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
643 active->filter_flags & RXON_FILTER_ASSOC_MSK);
644
645 #undef CHK
646 #undef CHK_NEQ
647
648 return 0;
649 }
650 EXPORT_SYMBOL(iwl_full_rxon_required);
651
652 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
653 struct iwl_rxon_context *ctx)
654 {
655 /*
656 * Assign the lowest rate -- should really get this from
657 * the beacon skb from mac80211.
658 */
659 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
660 return IWL_RATE_1M_PLCP;
661 else
662 return IWL_RATE_6M_PLCP;
663 }
664 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
665
666 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
667 struct iwl_ht_config *ht_conf,
668 struct iwl_rxon_context *ctx)
669 {
670 struct iwl_rxon_cmd *rxon = &ctx->staging;
671
672 if (!ctx->ht.enabled) {
673 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
674 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
675 RXON_FLG_HT40_PROT_MSK |
676 RXON_FLG_HT_PROT_MSK);
677 return;
678 }
679
680 /* FIXME: if the definition of ht.protection changed, the "translation"
681 * will be needed for rxon->flags
682 */
683 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
684
685 /* Set up channel bandwidth:
686 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
687 /* clear the HT channel mode before set the mode */
688 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
689 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
690 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
691 /* pure ht40 */
692 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
693 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
694 /* Note: control channel is opposite of extension channel */
695 switch (ctx->ht.extension_chan_offset) {
696 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
697 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
698 break;
699 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
700 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
701 break;
702 }
703 } else {
704 /* Note: control channel is opposite of extension channel */
705 switch (ctx->ht.extension_chan_offset) {
706 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
707 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
708 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
709 break;
710 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
711 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
712 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
713 break;
714 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
715 default:
716 /* channel location only valid if in Mixed mode */
717 IWL_ERR(priv, "invalid extension channel offset\n");
718 break;
719 }
720 }
721 } else {
722 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
723 }
724
725 if (priv->cfg->ops->hcmd->set_rxon_chain)
726 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
727
728 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
729 "extension channel offset 0x%x\n",
730 le32_to_cpu(rxon->flags), ctx->ht.protection,
731 ctx->ht.extension_chan_offset);
732 }
733
734 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
735 {
736 struct iwl_rxon_context *ctx;
737
738 for_each_context(priv, ctx)
739 _iwl_set_rxon_ht(priv, ht_conf, ctx);
740 }
741 EXPORT_SYMBOL(iwl_set_rxon_ht);
742
743 /* Return valid, unused, channel for a passive scan to reset the RF */
744 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
745 enum ieee80211_band band)
746 {
747 const struct iwl_channel_info *ch_info;
748 int i;
749 u8 channel = 0;
750 u8 min, max;
751 struct iwl_rxon_context *ctx;
752
753 if (band == IEEE80211_BAND_5GHZ) {
754 min = 14;
755 max = priv->channel_count;
756 } else {
757 min = 0;
758 max = 14;
759 }
760
761 for (i = min; i < max; i++) {
762 bool busy = false;
763
764 for_each_context(priv, ctx) {
765 busy = priv->channel_info[i].channel ==
766 le16_to_cpu(ctx->staging.channel);
767 if (busy)
768 break;
769 }
770
771 if (busy)
772 continue;
773
774 channel = priv->channel_info[i].channel;
775 ch_info = iwl_get_channel_info(priv, band, channel);
776 if (is_channel_valid(ch_info))
777 break;
778 }
779
780 return channel;
781 }
782 EXPORT_SYMBOL(iwl_get_single_channel_number);
783
784 /**
785 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
786 * @ch: requested channel as a pointer to struct ieee80211_channel
787
788 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
789 * in the staging RXON flag structure based on the ch->band
790 */
791 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
792 struct iwl_rxon_context *ctx)
793 {
794 enum ieee80211_band band = ch->band;
795 u16 channel = ch->hw_value;
796
797 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
798 (priv->band == band))
799 return 0;
800
801 ctx->staging.channel = cpu_to_le16(channel);
802 if (band == IEEE80211_BAND_5GHZ)
803 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
804 else
805 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
806
807 priv->band = band;
808
809 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
810
811 return 0;
812 }
813 EXPORT_SYMBOL(iwl_set_rxon_channel);
814
815 void iwl_set_flags_for_band(struct iwl_priv *priv,
816 struct iwl_rxon_context *ctx,
817 enum ieee80211_band band,
818 struct ieee80211_vif *vif)
819 {
820 if (band == IEEE80211_BAND_5GHZ) {
821 ctx->staging.flags &=
822 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
823 | RXON_FLG_CCK_MSK);
824 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
825 } else {
826 /* Copied from iwl_post_associate() */
827 if (vif && vif->bss_conf.use_short_slot)
828 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
829 else
830 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
831
832 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
833 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
834 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
835 }
836 }
837 EXPORT_SYMBOL(iwl_set_flags_for_band);
838
839 /*
840 * initialize rxon structure with default values from eeprom
841 */
842 void iwl_connection_init_rx_config(struct iwl_priv *priv,
843 struct iwl_rxon_context *ctx)
844 {
845 const struct iwl_channel_info *ch_info;
846
847 memset(&ctx->staging, 0, sizeof(ctx->staging));
848
849 if (!ctx->vif) {
850 ctx->staging.dev_type = ctx->unused_devtype;
851 } else switch (ctx->vif->type) {
852 case NL80211_IFTYPE_AP:
853 ctx->staging.dev_type = ctx->ap_devtype;
854 break;
855
856 case NL80211_IFTYPE_STATION:
857 ctx->staging.dev_type = ctx->station_devtype;
858 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
859 break;
860
861 case NL80211_IFTYPE_ADHOC:
862 ctx->staging.dev_type = ctx->ibss_devtype;
863 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
864 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
865 RXON_FILTER_ACCEPT_GRP_MSK;
866 break;
867
868 default:
869 IWL_ERR(priv, "Unsupported interface type %d\n",
870 ctx->vif->type);
871 break;
872 }
873
874 #if 0
875 /* TODO: Figure out when short_preamble would be set and cache from
876 * that */
877 if (!hw_to_local(priv->hw)->short_preamble)
878 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
879 else
880 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
881 #endif
882
883 ch_info = iwl_get_channel_info(priv, priv->band,
884 le16_to_cpu(ctx->active.channel));
885
886 if (!ch_info)
887 ch_info = &priv->channel_info[0];
888
889 ctx->staging.channel = cpu_to_le16(ch_info->channel);
890 priv->band = ch_info->band;
891
892 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
893
894 ctx->staging.ofdm_basic_rates =
895 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
896 ctx->staging.cck_basic_rates =
897 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
898
899 /* clear both MIX and PURE40 mode flag */
900 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
901 RXON_FLG_CHANNEL_MODE_PURE_40);
902 if (ctx->vif)
903 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
904
905 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
906 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
907 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
908 }
909 EXPORT_SYMBOL(iwl_connection_init_rx_config);
910
911 void iwl_set_rate(struct iwl_priv *priv)
912 {
913 const struct ieee80211_supported_band *hw = NULL;
914 struct ieee80211_rate *rate;
915 struct iwl_rxon_context *ctx;
916 int i;
917
918 hw = iwl_get_hw_mode(priv, priv->band);
919 if (!hw) {
920 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
921 return;
922 }
923
924 priv->active_rate = 0;
925
926 for (i = 0; i < hw->n_bitrates; i++) {
927 rate = &(hw->bitrates[i]);
928 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
929 priv->active_rate |= (1 << rate->hw_value);
930 }
931
932 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
933
934 for_each_context(priv, ctx) {
935 ctx->staging.cck_basic_rates =
936 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
937
938 ctx->staging.ofdm_basic_rates =
939 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
940 }
941 }
942 EXPORT_SYMBOL(iwl_set_rate);
943
944 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
945 {
946 /*
947 * MULTI-FIXME
948 * See iwl_mac_channel_switch.
949 */
950 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
951
952 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
953 return;
954
955 if (priv->switch_rxon.switch_in_progress) {
956 ieee80211_chswitch_done(ctx->vif, is_success);
957 mutex_lock(&priv->mutex);
958 priv->switch_rxon.switch_in_progress = false;
959 mutex_unlock(&priv->mutex);
960 }
961 }
962 EXPORT_SYMBOL(iwl_chswitch_done);
963
964 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
965 {
966 struct iwl_rx_packet *pkt = rxb_addr(rxb);
967 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
968 /*
969 * MULTI-FIXME
970 * See iwl_mac_channel_switch.
971 */
972 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
973 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
974
975 if (priv->switch_rxon.switch_in_progress) {
976 if (!le32_to_cpu(csa->status) &&
977 (csa->channel == priv->switch_rxon.channel)) {
978 rxon->channel = csa->channel;
979 ctx->staging.channel = csa->channel;
980 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
981 le16_to_cpu(csa->channel));
982 iwl_chswitch_done(priv, true);
983 } else {
984 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
985 le16_to_cpu(csa->channel));
986 iwl_chswitch_done(priv, false);
987 }
988 }
989 }
990 EXPORT_SYMBOL(iwl_rx_csa);
991
992 #ifdef CONFIG_IWLWIFI_DEBUG
993 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
994 struct iwl_rxon_context *ctx)
995 {
996 struct iwl_rxon_cmd *rxon = &ctx->staging;
997
998 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
999 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1000 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1001 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1002 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1003 le32_to_cpu(rxon->filter_flags));
1004 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1005 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1006 rxon->ofdm_basic_rates);
1007 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1008 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1009 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1010 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1011 }
1012 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1013 #endif
1014 /**
1015 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1016 */
1017 void iwl_irq_handle_error(struct iwl_priv *priv)
1018 {
1019 /* Set the FW error flag -- cleared on iwl_down */
1020 set_bit(STATUS_FW_ERROR, &priv->status);
1021
1022 /* Cancel currently queued command. */
1023 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1024
1025 IWL_ERR(priv, "Loaded firmware version: %s\n",
1026 priv->hw->wiphy->fw_version);
1027
1028 priv->cfg->ops->lib->dump_nic_error_log(priv);
1029 if (priv->cfg->ops->lib->dump_csr)
1030 priv->cfg->ops->lib->dump_csr(priv);
1031 if (priv->cfg->ops->lib->dump_fh)
1032 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1033 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1034 #ifdef CONFIG_IWLWIFI_DEBUG
1035 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1036 iwl_print_rx_config_cmd(priv,
1037 &priv->contexts[IWL_RXON_CTX_BSS]);
1038 #endif
1039
1040 wake_up_interruptible(&priv->wait_command_queue);
1041
1042 /* Keep the restart process from trying to send host
1043 * commands by clearing the INIT status bit */
1044 clear_bit(STATUS_READY, &priv->status);
1045
1046 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1047 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1048 "Restarting adapter due to uCode error.\n");
1049
1050 if (priv->cfg->mod_params->restart_fw)
1051 queue_work(priv->workqueue, &priv->restart);
1052 }
1053 }
1054 EXPORT_SYMBOL(iwl_irq_handle_error);
1055
1056 static int iwl_apm_stop_master(struct iwl_priv *priv)
1057 {
1058 int ret = 0;
1059
1060 /* stop device's busmaster DMA activity */
1061 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1062
1063 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1064 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1065 if (ret)
1066 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1067
1068 IWL_DEBUG_INFO(priv, "stop master\n");
1069
1070 return ret;
1071 }
1072
1073 void iwl_apm_stop(struct iwl_priv *priv)
1074 {
1075 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1076
1077 /* Stop device's DMA activity */
1078 iwl_apm_stop_master(priv);
1079
1080 /* Reset the entire device */
1081 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1082
1083 udelay(10);
1084
1085 /*
1086 * Clear "initialization complete" bit to move adapter from
1087 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1088 */
1089 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1090 }
1091 EXPORT_SYMBOL(iwl_apm_stop);
1092
1093
1094 /*
1095 * Start up NIC's basic functionality after it has been reset
1096 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1097 * NOTE: This does not load uCode nor start the embedded processor
1098 */
1099 int iwl_apm_init(struct iwl_priv *priv)
1100 {
1101 int ret = 0;
1102 u16 lctl;
1103
1104 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1105
1106 /*
1107 * Use "set_bit" below rather than "write", to preserve any hardware
1108 * bits already set by default after reset.
1109 */
1110
1111 /* Disable L0S exit timer (platform NMI Work/Around) */
1112 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1113 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1114
1115 /*
1116 * Disable L0s without affecting L1;
1117 * don't wait for ICH L0s (ICH bug W/A)
1118 */
1119 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1120 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1121
1122 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1123 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1124
1125 /*
1126 * Enable HAP INTA (interrupt from management bus) to
1127 * wake device's PCI Express link L1a -> L0s
1128 * NOTE: This is no-op for 3945 (non-existant bit)
1129 */
1130 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1131 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1132
1133 /*
1134 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1135 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1136 * If so (likely), disable L0S, so device moves directly L0->L1;
1137 * costs negligible amount of power savings.
1138 * If not (unlikely), enable L0S, so there is at least some
1139 * power savings, even without L1.
1140 */
1141 if (priv->cfg->base_params->set_l0s) {
1142 lctl = iwl_pcie_link_ctl(priv);
1143 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1144 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1145 /* L1-ASPM enabled; disable(!) L0S */
1146 iwl_set_bit(priv, CSR_GIO_REG,
1147 CSR_GIO_REG_VAL_L0S_ENABLED);
1148 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1149 } else {
1150 /* L1-ASPM disabled; enable(!) L0S */
1151 iwl_clear_bit(priv, CSR_GIO_REG,
1152 CSR_GIO_REG_VAL_L0S_ENABLED);
1153 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1154 }
1155 }
1156
1157 /* Configure analog phase-lock-loop before activating to D0A */
1158 if (priv->cfg->base_params->pll_cfg_val)
1159 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1160 priv->cfg->base_params->pll_cfg_val);
1161
1162 /*
1163 * Set "initialization complete" bit to move adapter from
1164 * D0U* --> D0A* (powered-up active) state.
1165 */
1166 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1167
1168 /*
1169 * Wait for clock stabilization; once stabilized, access to
1170 * device-internal resources is supported, e.g. iwl_write_prph()
1171 * and accesses to uCode SRAM.
1172 */
1173 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1174 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1175 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1176 if (ret < 0) {
1177 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1178 goto out;
1179 }
1180
1181 /*
1182 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1183 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1184 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1185 * and don't need BSM to restore data after power-saving sleep.
1186 *
1187 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1188 * do not disable clocks. This preserves any hardware bits already
1189 * set by default in "CLK_CTRL_REG" after reset.
1190 */
1191 if (priv->cfg->base_params->use_bsm)
1192 iwl_write_prph(priv, APMG_CLK_EN_REG,
1193 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1194 else
1195 iwl_write_prph(priv, APMG_CLK_EN_REG,
1196 APMG_CLK_VAL_DMA_CLK_RQT);
1197 udelay(20);
1198
1199 /* Disable L1-Active */
1200 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1201 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1202
1203 out:
1204 return ret;
1205 }
1206 EXPORT_SYMBOL(iwl_apm_init);
1207
1208
1209 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1210 {
1211 int ret = 0;
1212 s8 prev_tx_power = priv->tx_power_user_lmt;
1213
1214 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1215 IWL_WARN(priv,
1216 "Requested user TXPOWER %d below lower limit %d.\n",
1217 tx_power,
1218 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1219 return -EINVAL;
1220 }
1221
1222 if (tx_power > priv->tx_power_device_lmt) {
1223 IWL_WARN(priv,
1224 "Requested user TXPOWER %d above upper limit %d.\n",
1225 tx_power, priv->tx_power_device_lmt);
1226 return -EINVAL;
1227 }
1228
1229 if (priv->tx_power_user_lmt != tx_power)
1230 force = true;
1231
1232 /* if nic is not up don't send command */
1233 if (iwl_is_ready_rf(priv)) {
1234 priv->tx_power_user_lmt = tx_power;
1235 if (force && priv->cfg->ops->lib->send_tx_power)
1236 ret = priv->cfg->ops->lib->send_tx_power(priv);
1237 else if (!priv->cfg->ops->lib->send_tx_power)
1238 ret = -EOPNOTSUPP;
1239 /*
1240 * if fail to set tx_power, restore the orig. tx power
1241 */
1242 if (ret)
1243 priv->tx_power_user_lmt = prev_tx_power;
1244 }
1245
1246 /*
1247 * Even this is an async host command, the command
1248 * will always report success from uCode
1249 * So once driver can placing the command into the queue
1250 * successfully, driver can use priv->tx_power_user_lmt
1251 * to reflect the current tx power
1252 */
1253 return ret;
1254 }
1255 EXPORT_SYMBOL(iwl_set_tx_power);
1256
1257 irqreturn_t iwl_isr_legacy(int irq, void *data)
1258 {
1259 struct iwl_priv *priv = data;
1260 u32 inta, inta_mask;
1261 u32 inta_fh;
1262 unsigned long flags;
1263 if (!priv)
1264 return IRQ_NONE;
1265
1266 spin_lock_irqsave(&priv->lock, flags);
1267
1268 /* Disable (but don't clear!) interrupts here to avoid
1269 * back-to-back ISRs and sporadic interrupts from our NIC.
1270 * If we have something to service, the tasklet will re-enable ints.
1271 * If we *don't* have something, we'll re-enable before leaving here. */
1272 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1273 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1274
1275 /* Discover which interrupts are active/pending */
1276 inta = iwl_read32(priv, CSR_INT);
1277 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1278
1279 /* Ignore interrupt if there's nothing in NIC to service.
1280 * This may be due to IRQ shared with another device,
1281 * or due to sporadic interrupts thrown from our NIC. */
1282 if (!inta && !inta_fh) {
1283 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1284 goto none;
1285 }
1286
1287 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1288 /* Hardware disappeared. It might have already raised
1289 * an interrupt */
1290 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1291 goto unplugged;
1292 }
1293
1294 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1295 inta, inta_mask, inta_fh);
1296
1297 inta &= ~CSR_INT_BIT_SCD;
1298
1299 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1300 if (likely(inta || inta_fh))
1301 tasklet_schedule(&priv->irq_tasklet);
1302
1303 unplugged:
1304 spin_unlock_irqrestore(&priv->lock, flags);
1305 return IRQ_HANDLED;
1306
1307 none:
1308 /* re-enable interrupts here since we don't have anything to service. */
1309 /* only Re-enable if diabled by irq */
1310 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1311 iwl_enable_interrupts(priv);
1312 spin_unlock_irqrestore(&priv->lock, flags);
1313 return IRQ_NONE;
1314 }
1315 EXPORT_SYMBOL(iwl_isr_legacy);
1316
1317 void iwl_send_bt_config(struct iwl_priv *priv)
1318 {
1319 struct iwl_bt_cmd bt_cmd = {
1320 .lead_time = BT_LEAD_TIME_DEF,
1321 .max_kill = BT_MAX_KILL_DEF,
1322 .kill_ack_mask = 0,
1323 .kill_cts_mask = 0,
1324 };
1325
1326 if (!bt_coex_active)
1327 bt_cmd.flags = BT_COEX_DISABLE;
1328 else
1329 bt_cmd.flags = BT_COEX_ENABLE;
1330
1331 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1332 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1333
1334 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1335 sizeof(struct iwl_bt_cmd), &bt_cmd))
1336 IWL_ERR(priv, "failed to send BT Coex Config\n");
1337 }
1338 EXPORT_SYMBOL(iwl_send_bt_config);
1339
1340 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1341 {
1342 struct iwl_statistics_cmd statistics_cmd = {
1343 .configuration_flags =
1344 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1345 };
1346
1347 if (flags & CMD_ASYNC)
1348 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1349 sizeof(struct iwl_statistics_cmd),
1350 &statistics_cmd, NULL);
1351 else
1352 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1353 sizeof(struct iwl_statistics_cmd),
1354 &statistics_cmd);
1355 }
1356 EXPORT_SYMBOL(iwl_send_statistics_request);
1357
1358 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1359 struct iwl_rx_mem_buffer *rxb)
1360 {
1361 #ifdef CONFIG_IWLWIFI_DEBUG
1362 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1363 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1364 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1365 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1366 #endif
1367 }
1368 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1369
1370 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1371 struct iwl_rx_mem_buffer *rxb)
1372 {
1373 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1374 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1375 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1376 "notification for %s:\n", len,
1377 get_cmd_string(pkt->hdr.cmd));
1378 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1379 }
1380 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1381
1382 void iwl_rx_reply_error(struct iwl_priv *priv,
1383 struct iwl_rx_mem_buffer *rxb)
1384 {
1385 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1386
1387 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1388 "seq 0x%04X ser 0x%08X\n",
1389 le32_to_cpu(pkt->u.err_resp.error_type),
1390 get_cmd_string(pkt->u.err_resp.cmd_id),
1391 pkt->u.err_resp.cmd_id,
1392 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1393 le32_to_cpu(pkt->u.err_resp.error_info));
1394 }
1395 EXPORT_SYMBOL(iwl_rx_reply_error);
1396
1397 void iwl_clear_isr_stats(struct iwl_priv *priv)
1398 {
1399 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1400 }
1401
1402 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1403 const struct ieee80211_tx_queue_params *params)
1404 {
1405 struct iwl_priv *priv = hw->priv;
1406 struct iwl_rxon_context *ctx;
1407 unsigned long flags;
1408 int q;
1409
1410 IWL_DEBUG_MAC80211(priv, "enter\n");
1411
1412 if (!iwl_is_ready_rf(priv)) {
1413 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1414 return -EIO;
1415 }
1416
1417 if (queue >= AC_NUM) {
1418 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1419 return 0;
1420 }
1421
1422 q = AC_NUM - 1 - queue;
1423
1424 spin_lock_irqsave(&priv->lock, flags);
1425
1426 /*
1427 * MULTI-FIXME
1428 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1429 */
1430 for_each_context(priv, ctx) {
1431 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1432 cpu_to_le16(params->cw_min);
1433 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1434 cpu_to_le16(params->cw_max);
1435 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1436 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1437 cpu_to_le16((params->txop * 32));
1438
1439 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1440 }
1441
1442 spin_unlock_irqrestore(&priv->lock, flags);
1443
1444 IWL_DEBUG_MAC80211(priv, "leave\n");
1445 return 0;
1446 }
1447 EXPORT_SYMBOL(iwl_mac_conf_tx);
1448
1449 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1450 {
1451 struct iwl_priv *priv = hw->priv;
1452
1453 return priv->ibss_manager == IWL_IBSS_MANAGER;
1454 }
1455 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1456
1457 static void iwl_ht_conf(struct iwl_priv *priv,
1458 struct ieee80211_vif *vif)
1459 {
1460 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1461 struct ieee80211_sta *sta;
1462 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1463 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1464
1465 IWL_DEBUG_MAC80211(priv, "enter:\n");
1466
1467 if (!ctx->ht.enabled)
1468 return;
1469
1470 ctx->ht.protection =
1471 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1472 ctx->ht.non_gf_sta_present =
1473 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1474
1475 ht_conf->single_chain_sufficient = false;
1476
1477 switch (vif->type) {
1478 case NL80211_IFTYPE_STATION:
1479 rcu_read_lock();
1480 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1481 if (sta) {
1482 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1483 int maxstreams;
1484
1485 maxstreams = (ht_cap->mcs.tx_params &
1486 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1487 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1488 maxstreams += 1;
1489
1490 if ((ht_cap->mcs.rx_mask[1] == 0) &&
1491 (ht_cap->mcs.rx_mask[2] == 0))
1492 ht_conf->single_chain_sufficient = true;
1493 if (maxstreams <= 1)
1494 ht_conf->single_chain_sufficient = true;
1495 } else {
1496 /*
1497 * If at all, this can only happen through a race
1498 * when the AP disconnects us while we're still
1499 * setting up the connection, in that case mac80211
1500 * will soon tell us about that.
1501 */
1502 ht_conf->single_chain_sufficient = true;
1503 }
1504 rcu_read_unlock();
1505 break;
1506 case NL80211_IFTYPE_ADHOC:
1507 ht_conf->single_chain_sufficient = true;
1508 break;
1509 default:
1510 break;
1511 }
1512
1513 IWL_DEBUG_MAC80211(priv, "leave\n");
1514 }
1515
1516 static inline void iwl_set_no_assoc(struct iwl_priv *priv,
1517 struct ieee80211_vif *vif)
1518 {
1519 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1520
1521 iwl_led_disassociate(priv);
1522 /*
1523 * inform the ucode that there is no longer an
1524 * association and that no more packets should be
1525 * sent
1526 */
1527 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1528 ctx->staging.assoc_id = 0;
1529 iwlcore_commit_rxon(priv, ctx);
1530 }
1531
1532 static void iwlcore_beacon_update(struct ieee80211_hw *hw,
1533 struct ieee80211_vif *vif)
1534 {
1535 struct iwl_priv *priv = hw->priv;
1536 unsigned long flags;
1537 __le64 timestamp;
1538 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
1539
1540 if (!skb)
1541 return;
1542
1543 IWL_DEBUG_ASSOC(priv, "enter\n");
1544
1545 lockdep_assert_held(&priv->mutex);
1546
1547 if (!priv->beacon_ctx) {
1548 IWL_ERR(priv, "update beacon but no beacon context!\n");
1549 dev_kfree_skb(skb);
1550 return;
1551 }
1552
1553 spin_lock_irqsave(&priv->lock, flags);
1554
1555 if (priv->beacon_skb)
1556 dev_kfree_skb(priv->beacon_skb);
1557
1558 priv->beacon_skb = skb;
1559
1560 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1561 priv->timestamp = le64_to_cpu(timestamp);
1562
1563 IWL_DEBUG_ASSOC(priv, "leave\n");
1564
1565 spin_unlock_irqrestore(&priv->lock, flags);
1566
1567 if (!iwl_is_ready_rf(priv)) {
1568 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1569 return;
1570 }
1571
1572 priv->cfg->ops->lib->post_associate(priv, priv->beacon_ctx->vif);
1573 }
1574
1575 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1576 struct ieee80211_vif *vif,
1577 struct ieee80211_bss_conf *bss_conf,
1578 u32 changes)
1579 {
1580 struct iwl_priv *priv = hw->priv;
1581 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1582 int ret;
1583
1584 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1585
1586 if (!iwl_is_alive(priv))
1587 return;
1588
1589 mutex_lock(&priv->mutex);
1590
1591 if (changes & BSS_CHANGED_QOS) {
1592 unsigned long flags;
1593
1594 spin_lock_irqsave(&priv->lock, flags);
1595 ctx->qos_data.qos_active = bss_conf->qos;
1596 iwl_update_qos(priv, ctx);
1597 spin_unlock_irqrestore(&priv->lock, flags);
1598 }
1599
1600 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1601 /*
1602 * the add_interface code must make sure we only ever
1603 * have a single interface that could be beaconing at
1604 * any time.
1605 */
1606 if (vif->bss_conf.enable_beacon)
1607 priv->beacon_ctx = ctx;
1608 else
1609 priv->beacon_ctx = NULL;
1610 }
1611
1612 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1613 dev_kfree_skb(priv->beacon_skb);
1614 priv->beacon_skb = ieee80211_beacon_get(hw, vif);
1615 }
1616
1617 if (changes & BSS_CHANGED_BEACON_INT && vif->type == NL80211_IFTYPE_AP)
1618 iwl_send_rxon_timing(priv, ctx);
1619
1620 if (changes & BSS_CHANGED_BSSID) {
1621 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1622
1623 /*
1624 * If there is currently a HW scan going on in the
1625 * background then we need to cancel it else the RXON
1626 * below/in post_associate will fail.
1627 */
1628 if (iwl_scan_cancel_timeout(priv, 100)) {
1629 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1630 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1631 mutex_unlock(&priv->mutex);
1632 return;
1633 }
1634
1635 /* mac80211 only sets assoc when in STATION mode */
1636 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1637 memcpy(ctx->staging.bssid_addr,
1638 bss_conf->bssid, ETH_ALEN);
1639
1640 /* currently needed in a few places */
1641 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1642 } else {
1643 ctx->staging.filter_flags &=
1644 ~RXON_FILTER_ASSOC_MSK;
1645 }
1646
1647 }
1648
1649 /*
1650 * This needs to be after setting the BSSID in case
1651 * mac80211 decides to do both changes at once because
1652 * it will invoke post_associate.
1653 */
1654 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
1655 iwlcore_beacon_update(hw, vif);
1656
1657 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1658 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1659 bss_conf->use_short_preamble);
1660 if (bss_conf->use_short_preamble)
1661 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1662 else
1663 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1664 }
1665
1666 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1667 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1668 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1669 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1670 else
1671 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1672 if (bss_conf->use_cts_prot)
1673 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1674 else
1675 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1676 }
1677
1678 if (changes & BSS_CHANGED_BASIC_RATES) {
1679 /* XXX use this information
1680 *
1681 * To do that, remove code from iwl_set_rate() and put something
1682 * like this here:
1683 *
1684 if (A-band)
1685 ctx->staging.ofdm_basic_rates =
1686 bss_conf->basic_rates;
1687 else
1688 ctx->staging.ofdm_basic_rates =
1689 bss_conf->basic_rates >> 4;
1690 ctx->staging.cck_basic_rates =
1691 bss_conf->basic_rates & 0xF;
1692 */
1693 }
1694
1695 if (changes & BSS_CHANGED_HT) {
1696 iwl_ht_conf(priv, vif);
1697
1698 if (priv->cfg->ops->hcmd->set_rxon_chain)
1699 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1700 }
1701
1702 if (changes & BSS_CHANGED_ASSOC) {
1703 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1704 if (bss_conf->assoc) {
1705 priv->timestamp = bss_conf->timestamp;
1706
1707 iwl_led_associate(priv);
1708
1709 if (!iwl_is_rfkill(priv))
1710 priv->cfg->ops->lib->post_associate(priv, vif);
1711 } else
1712 iwl_set_no_assoc(priv, vif);
1713 }
1714
1715 if (changes && iwl_is_associated_ctx(ctx) && bss_conf->aid) {
1716 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1717 changes);
1718 ret = iwl_send_rxon_assoc(priv, ctx);
1719 if (!ret) {
1720 /* Sync active_rxon with latest change. */
1721 memcpy((void *)&ctx->active,
1722 &ctx->staging,
1723 sizeof(struct iwl_rxon_cmd));
1724 }
1725 }
1726
1727 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1728 if (vif->bss_conf.enable_beacon) {
1729 memcpy(ctx->staging.bssid_addr,
1730 bss_conf->bssid, ETH_ALEN);
1731 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1732 iwlcore_config_ap(priv, vif);
1733 } else
1734 iwl_set_no_assoc(priv, vif);
1735 }
1736
1737 if (changes & BSS_CHANGED_IBSS) {
1738 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1739 bss_conf->ibss_joined);
1740 if (ret)
1741 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1742 bss_conf->ibss_joined ? "add" : "remove",
1743 bss_conf->bssid);
1744 }
1745
1746 if (changes & BSS_CHANGED_IDLE &&
1747 priv->cfg->ops->hcmd->set_pan_params) {
1748 if (priv->cfg->ops->hcmd->set_pan_params(priv))
1749 IWL_ERR(priv, "failed to update PAN params\n");
1750 }
1751
1752 mutex_unlock(&priv->mutex);
1753
1754 IWL_DEBUG_MAC80211(priv, "leave\n");
1755 }
1756 EXPORT_SYMBOL(iwl_bss_info_changed);
1757
1758 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1759 {
1760 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1761
1762 iwl_connection_init_rx_config(priv, ctx);
1763
1764 if (priv->cfg->ops->hcmd->set_rxon_chain)
1765 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1766
1767 return iwlcore_commit_rxon(priv, ctx);
1768 }
1769
1770 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1771 {
1772 struct iwl_priv *priv = hw->priv;
1773 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1774 struct iwl_rxon_context *tmp, *ctx = NULL;
1775 int err = 0;
1776
1777 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1778 vif->type, vif->addr);
1779
1780 mutex_lock(&priv->mutex);
1781
1782 if (!iwl_is_ready_rf(priv)) {
1783 IWL_WARN(priv, "Try to add interface when device not ready\n");
1784 err = -EINVAL;
1785 goto out;
1786 }
1787
1788 for_each_context(priv, tmp) {
1789 u32 possible_modes =
1790 tmp->interface_modes | tmp->exclusive_interface_modes;
1791
1792 if (tmp->vif) {
1793 /* check if this busy context is exclusive */
1794 if (tmp->exclusive_interface_modes &
1795 BIT(tmp->vif->type)) {
1796 err = -EINVAL;
1797 goto out;
1798 }
1799 continue;
1800 }
1801
1802 if (!(possible_modes & BIT(vif->type)))
1803 continue;
1804
1805 /* have maybe usable context w/o interface */
1806 ctx = tmp;
1807 break;
1808 }
1809
1810 if (!ctx) {
1811 err = -EOPNOTSUPP;
1812 goto out;
1813 }
1814
1815 vif_priv->ctx = ctx;
1816 ctx->vif = vif;
1817 /*
1818 * This variable will be correct only when there's just
1819 * a single context, but all code using it is for hardware
1820 * that supports only one context.
1821 */
1822 priv->iw_mode = vif->type;
1823
1824 ctx->is_active = true;
1825
1826 err = iwl_set_mode(priv, vif);
1827 if (err) {
1828 if (!ctx->always_active)
1829 ctx->is_active = false;
1830 goto out_err;
1831 }
1832
1833 if (priv->cfg->bt_params &&
1834 priv->cfg->bt_params->advanced_bt_coexist &&
1835 vif->type == NL80211_IFTYPE_ADHOC) {
1836 /*
1837 * pretend to have high BT traffic as long as we
1838 * are operating in IBSS mode, as this will cause
1839 * the rate scaling etc. to behave as intended.
1840 */
1841 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1842 }
1843
1844 goto out;
1845
1846 out_err:
1847 ctx->vif = NULL;
1848 priv->iw_mode = NL80211_IFTYPE_STATION;
1849 out:
1850 mutex_unlock(&priv->mutex);
1851
1852 IWL_DEBUG_MAC80211(priv, "leave\n");
1853 return err;
1854 }
1855 EXPORT_SYMBOL(iwl_mac_add_interface);
1856
1857 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1858 struct ieee80211_vif *vif)
1859 {
1860 struct iwl_priv *priv = hw->priv;
1861 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1862
1863 IWL_DEBUG_MAC80211(priv, "enter\n");
1864
1865 mutex_lock(&priv->mutex);
1866
1867 WARN_ON(ctx->vif != vif);
1868 ctx->vif = NULL;
1869
1870 if (priv->scan_vif == vif) {
1871 iwl_scan_cancel_timeout(priv, 200);
1872 iwl_force_scan_end(priv);
1873 }
1874 iwl_set_mode(priv, vif);
1875
1876 if (!ctx->always_active)
1877 ctx->is_active = false;
1878
1879 /*
1880 * When removing the IBSS interface, overwrite the
1881 * BT traffic load with the stored one from the last
1882 * notification, if any. If this is a device that
1883 * doesn't implement this, this has no effect since
1884 * both values are the same and zero.
1885 */
1886 if (vif->type == NL80211_IFTYPE_ADHOC)
1887 priv->bt_traffic_load = priv->notif_bt_traffic_load;
1888
1889 memset(priv->bssid, 0, ETH_ALEN);
1890 mutex_unlock(&priv->mutex);
1891
1892 IWL_DEBUG_MAC80211(priv, "leave\n");
1893
1894 }
1895 EXPORT_SYMBOL(iwl_mac_remove_interface);
1896
1897 /**
1898 * iwl_mac_config - mac80211 config callback
1899 */
1900 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
1901 {
1902 struct iwl_priv *priv = hw->priv;
1903 const struct iwl_channel_info *ch_info;
1904 struct ieee80211_conf *conf = &hw->conf;
1905 struct ieee80211_channel *channel = conf->channel;
1906 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1907 struct iwl_rxon_context *ctx;
1908 unsigned long flags = 0;
1909 int ret = 0;
1910 u16 ch;
1911 int scan_active = 0;
1912
1913 mutex_lock(&priv->mutex);
1914
1915 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
1916 channel->hw_value, changed);
1917
1918 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
1919 test_bit(STATUS_SCANNING, &priv->status))) {
1920 scan_active = 1;
1921 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1922 }
1923
1924 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1925 IEEE80211_CONF_CHANGE_CHANNEL)) {
1926 /* mac80211 uses static for non-HT which is what we want */
1927 priv->current_ht_config.smps = conf->smps_mode;
1928
1929 /*
1930 * Recalculate chain counts.
1931 *
1932 * If monitor mode is enabled then mac80211 will
1933 * set up the SM PS mode to OFF if an HT channel is
1934 * configured.
1935 */
1936 if (priv->cfg->ops->hcmd->set_rxon_chain)
1937 for_each_context(priv, ctx)
1938 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1939 }
1940
1941 /* during scanning mac80211 will delay channel setting until
1942 * scan finish with changed = 0
1943 */
1944 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1945 if (scan_active)
1946 goto set_ch_out;
1947
1948 ch = channel->hw_value;
1949 ch_info = iwl_get_channel_info(priv, channel->band, ch);
1950 if (!is_channel_valid(ch_info)) {
1951 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
1952 ret = -EINVAL;
1953 goto set_ch_out;
1954 }
1955
1956 spin_lock_irqsave(&priv->lock, flags);
1957
1958 for_each_context(priv, ctx) {
1959 /* Configure HT40 channels */
1960 ctx->ht.enabled = conf_is_ht(conf);
1961 if (ctx->ht.enabled) {
1962 if (conf_is_ht40_minus(conf)) {
1963 ctx->ht.extension_chan_offset =
1964 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1965 ctx->ht.is_40mhz = true;
1966 } else if (conf_is_ht40_plus(conf)) {
1967 ctx->ht.extension_chan_offset =
1968 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1969 ctx->ht.is_40mhz = true;
1970 } else {
1971 ctx->ht.extension_chan_offset =
1972 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1973 ctx->ht.is_40mhz = false;
1974 }
1975 } else
1976 ctx->ht.is_40mhz = false;
1977
1978 /*
1979 * Default to no protection. Protection mode will
1980 * later be set from BSS config in iwl_ht_conf
1981 */
1982 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1983
1984 /* if we are switching from ht to 2.4 clear flags
1985 * from any ht related info since 2.4 does not
1986 * support ht */
1987 if ((le16_to_cpu(ctx->staging.channel) != ch))
1988 ctx->staging.flags = 0;
1989
1990 iwl_set_rxon_channel(priv, channel, ctx);
1991 iwl_set_rxon_ht(priv, ht_conf);
1992
1993 iwl_set_flags_for_band(priv, ctx, channel->band,
1994 ctx->vif);
1995 }
1996
1997 spin_unlock_irqrestore(&priv->lock, flags);
1998
1999 if (priv->cfg->ops->lib->update_bcast_stations)
2000 ret = priv->cfg->ops->lib->update_bcast_stations(priv);
2001
2002 set_ch_out:
2003 /* The list of supported rates and rate mask can be different
2004 * for each band; since the band may have changed, reset
2005 * the rate mask to what mac80211 lists */
2006 iwl_set_rate(priv);
2007 }
2008
2009 if (changed & (IEEE80211_CONF_CHANGE_PS |
2010 IEEE80211_CONF_CHANGE_IDLE)) {
2011 ret = iwl_power_update_mode(priv, false);
2012 if (ret)
2013 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2014 }
2015
2016 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2017 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2018 priv->tx_power_user_lmt, conf->power_level);
2019
2020 iwl_set_tx_power(priv, conf->power_level, false);
2021 }
2022
2023 if (!iwl_is_ready(priv)) {
2024 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2025 goto out;
2026 }
2027
2028 if (scan_active)
2029 goto out;
2030
2031 for_each_context(priv, ctx) {
2032 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2033 iwlcore_commit_rxon(priv, ctx);
2034 else
2035 IWL_DEBUG_INFO(priv,
2036 "Not re-sending same RXON configuration.\n");
2037 }
2038
2039 out:
2040 IWL_DEBUG_MAC80211(priv, "leave\n");
2041 mutex_unlock(&priv->mutex);
2042 return ret;
2043 }
2044 EXPORT_SYMBOL(iwl_mac_config);
2045
2046 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2047 {
2048 struct iwl_priv *priv = hw->priv;
2049 unsigned long flags;
2050 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2051 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2052
2053 mutex_lock(&priv->mutex);
2054 IWL_DEBUG_MAC80211(priv, "enter\n");
2055
2056 spin_lock_irqsave(&priv->lock, flags);
2057 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2058 spin_unlock_irqrestore(&priv->lock, flags);
2059
2060 spin_lock_irqsave(&priv->lock, flags);
2061
2062 /* new association get rid of ibss beacon skb */
2063 if (priv->beacon_skb)
2064 dev_kfree_skb(priv->beacon_skb);
2065
2066 priv->beacon_skb = NULL;
2067
2068 priv->timestamp = 0;
2069
2070 spin_unlock_irqrestore(&priv->lock, flags);
2071
2072 iwl_scan_cancel_timeout(priv, 100);
2073 if (!iwl_is_ready_rf(priv)) {
2074 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2075 mutex_unlock(&priv->mutex);
2076 return;
2077 }
2078
2079 /* we are restarting association process
2080 * clear RXON_FILTER_ASSOC_MSK bit
2081 */
2082 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2083 iwlcore_commit_rxon(priv, ctx);
2084
2085 iwl_set_rate(priv);
2086
2087 mutex_unlock(&priv->mutex);
2088
2089 IWL_DEBUG_MAC80211(priv, "leave\n");
2090 }
2091 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2092
2093 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2094 {
2095 if (!priv->txq)
2096 priv->txq = kzalloc(
2097 sizeof(struct iwl_tx_queue) *
2098 priv->cfg->base_params->num_of_queues,
2099 GFP_KERNEL);
2100 if (!priv->txq) {
2101 IWL_ERR(priv, "Not enough memory for txq\n");
2102 return -ENOMEM;
2103 }
2104 return 0;
2105 }
2106 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2107
2108 void iwl_free_txq_mem(struct iwl_priv *priv)
2109 {
2110 kfree(priv->txq);
2111 priv->txq = NULL;
2112 }
2113 EXPORT_SYMBOL(iwl_free_txq_mem);
2114
2115 #ifdef CONFIG_IWLWIFI_DEBUGFS
2116
2117 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2118
2119 void iwl_reset_traffic_log(struct iwl_priv *priv)
2120 {
2121 priv->tx_traffic_idx = 0;
2122 priv->rx_traffic_idx = 0;
2123 if (priv->tx_traffic)
2124 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2125 if (priv->rx_traffic)
2126 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2127 }
2128
2129 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2130 {
2131 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2132
2133 if (iwl_debug_level & IWL_DL_TX) {
2134 if (!priv->tx_traffic) {
2135 priv->tx_traffic =
2136 kzalloc(traffic_size, GFP_KERNEL);
2137 if (!priv->tx_traffic)
2138 return -ENOMEM;
2139 }
2140 }
2141 if (iwl_debug_level & IWL_DL_RX) {
2142 if (!priv->rx_traffic) {
2143 priv->rx_traffic =
2144 kzalloc(traffic_size, GFP_KERNEL);
2145 if (!priv->rx_traffic)
2146 return -ENOMEM;
2147 }
2148 }
2149 iwl_reset_traffic_log(priv);
2150 return 0;
2151 }
2152 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2153
2154 void iwl_free_traffic_mem(struct iwl_priv *priv)
2155 {
2156 kfree(priv->tx_traffic);
2157 priv->tx_traffic = NULL;
2158
2159 kfree(priv->rx_traffic);
2160 priv->rx_traffic = NULL;
2161 }
2162 EXPORT_SYMBOL(iwl_free_traffic_mem);
2163
2164 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2165 u16 length, struct ieee80211_hdr *header)
2166 {
2167 __le16 fc;
2168 u16 len;
2169
2170 if (likely(!(iwl_debug_level & IWL_DL_TX)))
2171 return;
2172
2173 if (!priv->tx_traffic)
2174 return;
2175
2176 fc = header->frame_control;
2177 if (ieee80211_is_data(fc)) {
2178 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2179 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2180 memcpy((priv->tx_traffic +
2181 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2182 header, len);
2183 priv->tx_traffic_idx =
2184 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2185 }
2186 }
2187 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2188
2189 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2190 u16 length, struct ieee80211_hdr *header)
2191 {
2192 __le16 fc;
2193 u16 len;
2194
2195 if (likely(!(iwl_debug_level & IWL_DL_RX)))
2196 return;
2197
2198 if (!priv->rx_traffic)
2199 return;
2200
2201 fc = header->frame_control;
2202 if (ieee80211_is_data(fc)) {
2203 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2204 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2205 memcpy((priv->rx_traffic +
2206 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2207 header, len);
2208 priv->rx_traffic_idx =
2209 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2210 }
2211 }
2212 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2213
2214 const char *get_mgmt_string(int cmd)
2215 {
2216 switch (cmd) {
2217 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2218 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2219 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2220 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2221 IWL_CMD(MANAGEMENT_PROBE_REQ);
2222 IWL_CMD(MANAGEMENT_PROBE_RESP);
2223 IWL_CMD(MANAGEMENT_BEACON);
2224 IWL_CMD(MANAGEMENT_ATIM);
2225 IWL_CMD(MANAGEMENT_DISASSOC);
2226 IWL_CMD(MANAGEMENT_AUTH);
2227 IWL_CMD(MANAGEMENT_DEAUTH);
2228 IWL_CMD(MANAGEMENT_ACTION);
2229 default:
2230 return "UNKNOWN";
2231
2232 }
2233 }
2234
2235 const char *get_ctrl_string(int cmd)
2236 {
2237 switch (cmd) {
2238 IWL_CMD(CONTROL_BACK_REQ);
2239 IWL_CMD(CONTROL_BACK);
2240 IWL_CMD(CONTROL_PSPOLL);
2241 IWL_CMD(CONTROL_RTS);
2242 IWL_CMD(CONTROL_CTS);
2243 IWL_CMD(CONTROL_ACK);
2244 IWL_CMD(CONTROL_CFEND);
2245 IWL_CMD(CONTROL_CFENDACK);
2246 default:
2247 return "UNKNOWN";
2248
2249 }
2250 }
2251
2252 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2253 {
2254 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2255 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2256 priv->led_tpt = 0;
2257 }
2258
2259 /*
2260 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2261 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2262 * Use debugFs to display the rx/rx_statistics
2263 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2264 * information will be recorded, but DATA pkt still will be recorded
2265 * for the reason of iwl_led.c need to control the led blinking based on
2266 * number of tx and rx data.
2267 *
2268 */
2269 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2270 {
2271 struct traffic_stats *stats;
2272
2273 if (is_tx)
2274 stats = &priv->tx_stats;
2275 else
2276 stats = &priv->rx_stats;
2277
2278 if (ieee80211_is_mgmt(fc)) {
2279 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2280 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2281 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2282 break;
2283 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2284 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2285 break;
2286 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2287 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2288 break;
2289 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2290 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2291 break;
2292 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2293 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2294 break;
2295 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2296 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2297 break;
2298 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2299 stats->mgmt[MANAGEMENT_BEACON]++;
2300 break;
2301 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2302 stats->mgmt[MANAGEMENT_ATIM]++;
2303 break;
2304 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2305 stats->mgmt[MANAGEMENT_DISASSOC]++;
2306 break;
2307 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2308 stats->mgmt[MANAGEMENT_AUTH]++;
2309 break;
2310 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2311 stats->mgmt[MANAGEMENT_DEAUTH]++;
2312 break;
2313 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2314 stats->mgmt[MANAGEMENT_ACTION]++;
2315 break;
2316 }
2317 } else if (ieee80211_is_ctl(fc)) {
2318 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2319 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2320 stats->ctrl[CONTROL_BACK_REQ]++;
2321 break;
2322 case cpu_to_le16(IEEE80211_STYPE_BACK):
2323 stats->ctrl[CONTROL_BACK]++;
2324 break;
2325 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2326 stats->ctrl[CONTROL_PSPOLL]++;
2327 break;
2328 case cpu_to_le16(IEEE80211_STYPE_RTS):
2329 stats->ctrl[CONTROL_RTS]++;
2330 break;
2331 case cpu_to_le16(IEEE80211_STYPE_CTS):
2332 stats->ctrl[CONTROL_CTS]++;
2333 break;
2334 case cpu_to_le16(IEEE80211_STYPE_ACK):
2335 stats->ctrl[CONTROL_ACK]++;
2336 break;
2337 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2338 stats->ctrl[CONTROL_CFEND]++;
2339 break;
2340 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2341 stats->ctrl[CONTROL_CFENDACK]++;
2342 break;
2343 }
2344 } else {
2345 /* data */
2346 stats->data_cnt++;
2347 stats->data_bytes += len;
2348 }
2349 iwl_leds_background(priv);
2350 }
2351 EXPORT_SYMBOL(iwl_update_stats);
2352 #endif
2353
2354 static void iwl_force_rf_reset(struct iwl_priv *priv)
2355 {
2356 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2357 return;
2358
2359 if (!iwl_is_any_associated(priv)) {
2360 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2361 return;
2362 }
2363 /*
2364 * There is no easy and better way to force reset the radio,
2365 * the only known method is switching channel which will force to
2366 * reset and tune the radio.
2367 * Use internal short scan (single channel) operation to should
2368 * achieve this objective.
2369 * Driver should reset the radio when number of consecutive missed
2370 * beacon, or any other uCode error condition detected.
2371 */
2372 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2373 iwl_internal_short_hw_scan(priv);
2374 }
2375
2376
2377 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
2378 {
2379 struct iwl_force_reset *force_reset;
2380
2381 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2382 return -EINVAL;
2383
2384 if (mode >= IWL_MAX_FORCE_RESET) {
2385 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2386 return -EINVAL;
2387 }
2388 force_reset = &priv->force_reset[mode];
2389 force_reset->reset_request_count++;
2390 if (!external) {
2391 if (force_reset->last_force_reset_jiffies &&
2392 time_after(force_reset->last_force_reset_jiffies +
2393 force_reset->reset_duration, jiffies)) {
2394 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2395 force_reset->reset_reject_count++;
2396 return -EAGAIN;
2397 }
2398 }
2399 force_reset->reset_success_count++;
2400 force_reset->last_force_reset_jiffies = jiffies;
2401 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2402 switch (mode) {
2403 case IWL_RF_RESET:
2404 iwl_force_rf_reset(priv);
2405 break;
2406 case IWL_FW_RESET:
2407 /*
2408 * if the request is from external(ex: debugfs),
2409 * then always perform the request in regardless the module
2410 * parameter setting
2411 * if the request is from internal (uCode error or driver
2412 * detect failure), then fw_restart module parameter
2413 * need to be check before performing firmware reload
2414 */
2415 if (!external && !priv->cfg->mod_params->restart_fw) {
2416 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
2417 "module parameter setting\n");
2418 break;
2419 }
2420 IWL_ERR(priv, "On demand firmware reload\n");
2421 /* Set the FW error flag -- cleared on iwl_down */
2422 set_bit(STATUS_FW_ERROR, &priv->status);
2423 wake_up_interruptible(&priv->wait_command_queue);
2424 /*
2425 * Keep the restart process from trying to send host
2426 * commands by clearing the INIT status bit
2427 */
2428 clear_bit(STATUS_READY, &priv->status);
2429 queue_work(priv->workqueue, &priv->restart);
2430 break;
2431 }
2432 return 0;
2433 }
2434
2435 /**
2436 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2437 *
2438 * During normal condition (no queue is stuck), the timer is continually set to
2439 * execute every monitor_recover_period milliseconds after the last timer
2440 * expired. When the queue read_ptr is at the same place, the timer is
2441 * shorten to 100mSecs. This is
2442 * 1) to reduce the chance that the read_ptr may wrap around (not stuck)
2443 * 2) to detect the stuck queues quicker before the station and AP can
2444 * disassociate each other.
2445 *
2446 * This function monitors all the tx queues and recover from it if any
2447 * of the queues are stuck.
2448 * 1. It first check the cmd queue for stuck conditions. If it is stuck,
2449 * it will recover by resetting the firmware and return.
2450 * 2. Then, it checks for station association. If it associates it will check
2451 * other queues. If any queue is stuck, it will recover by resetting
2452 * the firmware.
2453 * Note: It the number of times the queue read_ptr to be at the same place to
2454 * be MAX_REPEAT+1 in order to consider to be stuck.
2455 */
2456 /*
2457 * The maximum number of times the read pointer of the tx queue at the
2458 * same place without considering to be stuck.
2459 */
2460 #define MAX_REPEAT (2)
2461 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2462 {
2463 struct iwl_tx_queue *txq;
2464 struct iwl_queue *q;
2465
2466 txq = &priv->txq[cnt];
2467 q = &txq->q;
2468 /* queue is empty, skip */
2469 if (q->read_ptr == q->write_ptr)
2470 return 0;
2471
2472 if (q->read_ptr == q->last_read_ptr) {
2473 /* a queue has not been read from last time */
2474 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2475 IWL_ERR(priv,
2476 "queue %d stuck %d time. Fw reload.\n",
2477 q->id, q->repeat_same_read_ptr);
2478 q->repeat_same_read_ptr = 0;
2479 iwl_force_reset(priv, IWL_FW_RESET, false);
2480 } else {
2481 q->repeat_same_read_ptr++;
2482 IWL_DEBUG_RADIO(priv,
2483 "queue %d, not read %d time\n",
2484 q->id,
2485 q->repeat_same_read_ptr);
2486 mod_timer(&priv->monitor_recover,
2487 jiffies + msecs_to_jiffies(
2488 IWL_ONE_HUNDRED_MSECS));
2489 return 1;
2490 }
2491 } else {
2492 q->last_read_ptr = q->read_ptr;
2493 q->repeat_same_read_ptr = 0;
2494 }
2495 return 0;
2496 }
2497
2498 void iwl_bg_monitor_recover(unsigned long data)
2499 {
2500 struct iwl_priv *priv = (struct iwl_priv *)data;
2501 int cnt;
2502
2503 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2504 return;
2505
2506 /* monitor and check for stuck cmd queue */
2507 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
2508 return;
2509
2510 /* monitor and check for other stuck queues */
2511 if (iwl_is_any_associated(priv)) {
2512 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2513 /* skip as we already checked the command queue */
2514 if (cnt == priv->cmd_queue)
2515 continue;
2516 if (iwl_check_stuck_queue(priv, cnt))
2517 return;
2518 }
2519 }
2520 if (priv->cfg->base_params->monitor_recover_period) {
2521 /*
2522 * Reschedule the timer to occur in
2523 * priv->cfg->base_params->monitor_recover_period
2524 */
2525 mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
2526 priv->cfg->base_params->monitor_recover_period));
2527 }
2528 }
2529 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2530
2531
2532 /*
2533 * extended beacon time format
2534 * time in usec will be changed into a 32-bit value in extended:internal format
2535 * the extended part is the beacon counts
2536 * the internal part is the time in usec within one beacon interval
2537 */
2538 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2539 {
2540 u32 quot;
2541 u32 rem;
2542 u32 interval = beacon_interval * TIME_UNIT;
2543
2544 if (!interval || !usec)
2545 return 0;
2546
2547 quot = (usec / interval) &
2548 (iwl_beacon_time_mask_high(priv,
2549 priv->hw_params.beacon_time_tsf_bits) >>
2550 priv->hw_params.beacon_time_tsf_bits);
2551 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2552 priv->hw_params.beacon_time_tsf_bits);
2553
2554 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2555 }
2556 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2557
2558 /* base is usually what we get from ucode with each received frame,
2559 * the same as HW timer counter counting down
2560 */
2561 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2562 u32 addon, u32 beacon_interval)
2563 {
2564 u32 base_low = base & iwl_beacon_time_mask_low(priv,
2565 priv->hw_params.beacon_time_tsf_bits);
2566 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2567 priv->hw_params.beacon_time_tsf_bits);
2568 u32 interval = beacon_interval * TIME_UNIT;
2569 u32 res = (base & iwl_beacon_time_mask_high(priv,
2570 priv->hw_params.beacon_time_tsf_bits)) +
2571 (addon & iwl_beacon_time_mask_high(priv,
2572 priv->hw_params.beacon_time_tsf_bits));
2573
2574 if (base_low > addon_low)
2575 res += base_low - addon_low;
2576 else if (base_low < addon_low) {
2577 res += interval + base_low - addon_low;
2578 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2579 } else
2580 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2581
2582 return cpu_to_le32(res);
2583 }
2584 EXPORT_SYMBOL(iwl_add_beacon_time);
2585
2586 #ifdef CONFIG_PM
2587
2588 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2589 {
2590 struct iwl_priv *priv = pci_get_drvdata(pdev);
2591
2592 /*
2593 * This function is called when system goes into suspend state
2594 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2595 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2596 * it will not call apm_ops.stop() to stop the DMA operation.
2597 * Calling apm_ops.stop here to make sure we stop the DMA.
2598 */
2599 iwl_apm_stop(priv);
2600
2601 pci_save_state(pdev);
2602 pci_disable_device(pdev);
2603 pci_set_power_state(pdev, PCI_D3hot);
2604
2605 return 0;
2606 }
2607 EXPORT_SYMBOL(iwl_pci_suspend);
2608
2609 int iwl_pci_resume(struct pci_dev *pdev)
2610 {
2611 struct iwl_priv *priv = pci_get_drvdata(pdev);
2612 int ret;
2613 bool hw_rfkill = false;
2614
2615 /*
2616 * We disable the RETRY_TIMEOUT register (0x41) to keep
2617 * PCI Tx retries from interfering with C3 CPU state.
2618 */
2619 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2620
2621 pci_set_power_state(pdev, PCI_D0);
2622 ret = pci_enable_device(pdev);
2623 if (ret)
2624 return ret;
2625 pci_restore_state(pdev);
2626 iwl_enable_interrupts(priv);
2627
2628 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2629 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2630 hw_rfkill = true;
2631
2632 if (hw_rfkill)
2633 set_bit(STATUS_RF_KILL_HW, &priv->status);
2634 else
2635 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2636
2637 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2638
2639 return 0;
2640 }
2641 EXPORT_SYMBOL(iwl_pci_resume);
2642
2643 #endif /* CONFIG_PM */
Linux kernel - Deliverables
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