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iwlagn: remove un-necessary "_agn"
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob9b9f462ea0ff3aaf6050b9ff67cb3877c46c34b6
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 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 #include "iwl-agn.h"
45 #include "iwl-trans.h"
46
47 u32 iwl_debug_level;
48
49 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
50
51 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
52 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
53 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
54 struct ieee80211_sta_ht_cap *ht_info,
55 enum ieee80211_band band)
56 {
57 u16 max_bit_rate = 0;
58 u8 rx_chains_num = priv->hw_params.rx_chains_num;
59 u8 tx_chains_num = priv->hw_params.tx_chains_num;
60
61 ht_info->cap = 0;
62 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
63
64 ht_info->ht_supported = true;
65
66 if (priv->cfg->ht_params &&
67 priv->cfg->ht_params->ht_greenfield_support)
68 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
69 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
70 max_bit_rate = MAX_BIT_RATE_20_MHZ;
71 if (priv->hw_params.ht40_channel & BIT(band)) {
72 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
73 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
74 ht_info->mcs.rx_mask[4] = 0x01;
75 max_bit_rate = MAX_BIT_RATE_40_MHZ;
76 }
77
78 if (iwlagn_mod_params.amsdu_size_8K)
79 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
80
81 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
82 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
83 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
84 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
85 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
86 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
87
88 ht_info->mcs.rx_mask[0] = 0xFF;
89 if (rx_chains_num >= 2)
90 ht_info->mcs.rx_mask[1] = 0xFF;
91 if (rx_chains_num >= 3)
92 ht_info->mcs.rx_mask[2] = 0xFF;
93
94 /* Highest supported Rx data rate */
95 max_bit_rate *= rx_chains_num;
96 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
97 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
98
99 /* Tx MCS capabilities */
100 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
101 if (tx_chains_num != rx_chains_num) {
102 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
103 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
104 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
105 }
106 }
107
108 /**
109 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
110 */
111 int iwlcore_init_geos(struct iwl_priv *priv)
112 {
113 struct iwl_channel_info *ch;
114 struct ieee80211_supported_band *sband;
115 struct ieee80211_channel *channels;
116 struct ieee80211_channel *geo_ch;
117 struct ieee80211_rate *rates;
118 int i = 0;
119 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
120
121 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
122 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
123 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
124 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
125 return 0;
126 }
127
128 channels = kzalloc(sizeof(struct ieee80211_channel) *
129 priv->channel_count, GFP_KERNEL);
130 if (!channels)
131 return -ENOMEM;
132
133 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
134 GFP_KERNEL);
135 if (!rates) {
136 kfree(channels);
137 return -ENOMEM;
138 }
139
140 /* 5.2GHz channels start after the 2.4GHz channels */
141 sband = &priv->bands[IEEE80211_BAND_5GHZ];
142 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
143 /* just OFDM */
144 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
145 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
146
147 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
148 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
149 IEEE80211_BAND_5GHZ);
150
151 sband = &priv->bands[IEEE80211_BAND_2GHZ];
152 sband->channels = channels;
153 /* OFDM & CCK */
154 sband->bitrates = rates;
155 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
156
157 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
158 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
159 IEEE80211_BAND_2GHZ);
160
161 priv->ieee_channels = channels;
162 priv->ieee_rates = rates;
163
164 for (i = 0; i < priv->channel_count; i++) {
165 ch = &priv->channel_info[i];
166
167 /* FIXME: might be removed if scan is OK */
168 if (!is_channel_valid(ch))
169 continue;
170
171 sband = &priv->bands[ch->band];
172
173 geo_ch = &sband->channels[sband->n_channels++];
174
175 geo_ch->center_freq =
176 ieee80211_channel_to_frequency(ch->channel, ch->band);
177 geo_ch->max_power = ch->max_power_avg;
178 geo_ch->max_antenna_gain = 0xff;
179 geo_ch->hw_value = ch->channel;
180
181 if (is_channel_valid(ch)) {
182 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
183 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
184
185 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
186 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
187
188 if (ch->flags & EEPROM_CHANNEL_RADAR)
189 geo_ch->flags |= IEEE80211_CHAN_RADAR;
190
191 geo_ch->flags |= ch->ht40_extension_channel;
192
193 if (ch->max_power_avg > max_tx_power)
194 max_tx_power = ch->max_power_avg;
195 } else {
196 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
197 }
198
199 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
200 ch->channel, geo_ch->center_freq,
201 is_channel_a_band(ch) ? "5.2" : "2.4",
202 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
203 "restricted" : "valid",
204 geo_ch->flags);
205 }
206
207 priv->tx_power_device_lmt = max_tx_power;
208 priv->tx_power_user_lmt = max_tx_power;
209 priv->tx_power_next = max_tx_power;
210
211 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
212 priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
213 char buf[32];
214 bus_get_hw_id(priv->bus, buf, sizeof(buf));
215 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
216 "Please send your %s to maintainer.\n", buf);
217 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
218 }
219
220 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
221 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
222 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
223
224 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
225
226 return 0;
227 }
228
229 /*
230 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
231 */
232 void iwlcore_free_geos(struct iwl_priv *priv)
233 {
234 kfree(priv->ieee_channels);
235 kfree(priv->ieee_rates);
236 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
237 }
238
239 static bool iwl_is_channel_extension(struct iwl_priv *priv,
240 enum ieee80211_band band,
241 u16 channel, u8 extension_chan_offset)
242 {
243 const struct iwl_channel_info *ch_info;
244
245 ch_info = iwl_get_channel_info(priv, band, channel);
246 if (!is_channel_valid(ch_info))
247 return false;
248
249 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
250 return !(ch_info->ht40_extension_channel &
251 IEEE80211_CHAN_NO_HT40PLUS);
252 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
253 return !(ch_info->ht40_extension_channel &
254 IEEE80211_CHAN_NO_HT40MINUS);
255
256 return false;
257 }
258
259 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
260 struct iwl_rxon_context *ctx,
261 struct ieee80211_sta_ht_cap *ht_cap)
262 {
263 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
264 return false;
265
266 /*
267 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
268 * the bit will not set if it is pure 40MHz case
269 */
270 if (ht_cap && !ht_cap->ht_supported)
271 return false;
272
273 #ifdef CONFIG_IWLWIFI_DEBUGFS
274 if (priv->disable_ht40)
275 return false;
276 #endif
277
278 return iwl_is_channel_extension(priv, priv->band,
279 le16_to_cpu(ctx->staging.channel),
280 ctx->ht.extension_chan_offset);
281 }
282
283 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
284 {
285 u16 new_val;
286 u16 beacon_factor;
287
288 /*
289 * If mac80211 hasn't given us a beacon interval, program
290 * the default into the device (not checking this here
291 * would cause the adjustment below to return the maximum
292 * value, which may break PAN.)
293 */
294 if (!beacon_val)
295 return DEFAULT_BEACON_INTERVAL;
296
297 /*
298 * If the beacon interval we obtained from the peer
299 * is too large, we'll have to wake up more often
300 * (and in IBSS case, we'll beacon too much)
301 *
302 * For example, if max_beacon_val is 4096, and the
303 * requested beacon interval is 7000, we'll have to
304 * use 3500 to be able to wake up on the beacons.
305 *
306 * This could badly influence beacon detection stats.
307 */
308
309 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
310 new_val = beacon_val / beacon_factor;
311
312 if (!new_val)
313 new_val = max_beacon_val;
314
315 return new_val;
316 }
317
318 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
319 {
320 u64 tsf;
321 s32 interval_tm, rem;
322 struct ieee80211_conf *conf = NULL;
323 u16 beacon_int;
324 struct ieee80211_vif *vif = ctx->vif;
325
326 conf = ieee80211_get_hw_conf(priv->hw);
327
328 lockdep_assert_held(&priv->mutex);
329
330 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
331
332 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
333 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
334
335 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
336
337 /*
338 * TODO: For IBSS we need to get atim_window from mac80211,
339 * for now just always use 0
340 */
341 ctx->timing.atim_window = 0;
342
343 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
344 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
345 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
346 priv->contexts[IWL_RXON_CTX_BSS].vif &&
347 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
348 ctx->timing.beacon_interval =
349 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
350 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
351 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
352 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
353 priv->contexts[IWL_RXON_CTX_PAN].vif &&
354 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
355 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
356 !ctx->vif->bss_conf.beacon_int)) {
357 ctx->timing.beacon_interval =
358 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
359 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
360 } else {
361 beacon_int = iwl_adjust_beacon_interval(beacon_int,
362 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
363 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
364 }
365
366 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
367 interval_tm = beacon_int * TIME_UNIT;
368 rem = do_div(tsf, interval_tm);
369 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
370
371 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
372
373 IWL_DEBUG_ASSOC(priv,
374 "beacon interval %d beacon timer %d beacon tim %d\n",
375 le16_to_cpu(ctx->timing.beacon_interval),
376 le32_to_cpu(ctx->timing.beacon_init_val),
377 le16_to_cpu(ctx->timing.atim_window));
378
379 return trans_send_cmd_pdu(&priv->trans, ctx->rxon_timing_cmd,
380 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
381 }
382
383 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
384 int hw_decrypt)
385 {
386 struct iwl_rxon_cmd *rxon = &ctx->staging;
387
388 if (hw_decrypt)
389 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
390 else
391 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
392
393 }
394
395 /* validate RXON structure is valid */
396 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
397 {
398 struct iwl_rxon_cmd *rxon = &ctx->staging;
399 u32 errors = 0;
400
401 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
402 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
403 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
404 errors |= BIT(0);
405 }
406 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
407 IWL_WARN(priv, "check 2.4G: wrong radar\n");
408 errors |= BIT(1);
409 }
410 } else {
411 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
412 IWL_WARN(priv, "check 5.2G: not short slot!\n");
413 errors |= BIT(2);
414 }
415 if (rxon->flags & RXON_FLG_CCK_MSK) {
416 IWL_WARN(priv, "check 5.2G: CCK!\n");
417 errors |= BIT(3);
418 }
419 }
420 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
421 IWL_WARN(priv, "mac/bssid mcast!\n");
422 errors |= BIT(4);
423 }
424
425 /* make sure basic rates 6Mbps and 1Mbps are supported */
426 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
427 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
428 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
429 errors |= BIT(5);
430 }
431
432 if (le16_to_cpu(rxon->assoc_id) > 2007) {
433 IWL_WARN(priv, "aid > 2007\n");
434 errors |= BIT(6);
435 }
436
437 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
438 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
439 IWL_WARN(priv, "CCK and short slot\n");
440 errors |= BIT(7);
441 }
442
443 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
444 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
445 IWL_WARN(priv, "CCK and auto detect");
446 errors |= BIT(8);
447 }
448
449 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
450 RXON_FLG_TGG_PROTECT_MSK)) ==
451 RXON_FLG_TGG_PROTECT_MSK) {
452 IWL_WARN(priv, "TGg but no auto-detect\n");
453 errors |= BIT(9);
454 }
455
456 if (rxon->channel == 0) {
457 IWL_WARN(priv, "zero channel is invalid\n");
458 errors |= BIT(10);
459 }
460
461 WARN(errors, "Invalid RXON (%#x), channel %d",
462 errors, le16_to_cpu(rxon->channel));
463
464 return errors ? -EINVAL : 0;
465 }
466
467 /**
468 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
469 * @priv: staging_rxon is compared to active_rxon
470 *
471 * If the RXON structure is changing enough to require a new tune,
472 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
473 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
474 */
475 int iwl_full_rxon_required(struct iwl_priv *priv,
476 struct iwl_rxon_context *ctx)
477 {
478 const struct iwl_rxon_cmd *staging = &ctx->staging;
479 const struct iwl_rxon_cmd *active = &ctx->active;
480
481 #define CHK(cond) \
482 if ((cond)) { \
483 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
484 return 1; \
485 }
486
487 #define CHK_NEQ(c1, c2) \
488 if ((c1) != (c2)) { \
489 IWL_DEBUG_INFO(priv, "need full RXON - " \
490 #c1 " != " #c2 " - %d != %d\n", \
491 (c1), (c2)); \
492 return 1; \
493 }
494
495 /* These items are only settable from the full RXON command */
496 CHK(!iwl_is_associated_ctx(ctx));
497 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
498 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
499 CHK(compare_ether_addr(staging->wlap_bssid_addr,
500 active->wlap_bssid_addr));
501 CHK_NEQ(staging->dev_type, active->dev_type);
502 CHK_NEQ(staging->channel, active->channel);
503 CHK_NEQ(staging->air_propagation, active->air_propagation);
504 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
505 active->ofdm_ht_single_stream_basic_rates);
506 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
507 active->ofdm_ht_dual_stream_basic_rates);
508 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
509 active->ofdm_ht_triple_stream_basic_rates);
510 CHK_NEQ(staging->assoc_id, active->assoc_id);
511
512 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
513 * be updated with the RXON_ASSOC command -- however only some
514 * flag transitions are allowed using RXON_ASSOC */
515
516 /* Check if we are not switching bands */
517 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
518 active->flags & RXON_FLG_BAND_24G_MSK);
519
520 /* Check if we are switching association toggle */
521 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
522 active->filter_flags & RXON_FILTER_ASSOC_MSK);
523
524 #undef CHK
525 #undef CHK_NEQ
526
527 return 0;
528 }
529
530 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
531 struct iwl_ht_config *ht_conf,
532 struct iwl_rxon_context *ctx)
533 {
534 struct iwl_rxon_cmd *rxon = &ctx->staging;
535
536 if (!ctx->ht.enabled) {
537 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
538 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
539 RXON_FLG_HT40_PROT_MSK |
540 RXON_FLG_HT_PROT_MSK);
541 return;
542 }
543
544 /* FIXME: if the definition of ht.protection changed, the "translation"
545 * will be needed for rxon->flags
546 */
547 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
548
549 /* Set up channel bandwidth:
550 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
551 /* clear the HT channel mode before set the mode */
552 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
553 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
554 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
555 /* pure ht40 */
556 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
557 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
558 /* Note: control channel is opposite of extension channel */
559 switch (ctx->ht.extension_chan_offset) {
560 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
561 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
562 break;
563 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
564 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
565 break;
566 }
567 } else {
568 /* Note: control channel is opposite of extension channel */
569 switch (ctx->ht.extension_chan_offset) {
570 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
571 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
572 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
573 break;
574 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
575 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
576 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
577 break;
578 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
579 default:
580 /* channel location only valid if in Mixed mode */
581 IWL_ERR(priv, "invalid extension channel offset\n");
582 break;
583 }
584 }
585 } else {
586 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
587 }
588
589 iwlagn_set_rxon_chain(priv, ctx);
590
591 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
592 "extension channel offset 0x%x\n",
593 le32_to_cpu(rxon->flags), ctx->ht.protection,
594 ctx->ht.extension_chan_offset);
595 }
596
597 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
598 {
599 struct iwl_rxon_context *ctx;
600
601 for_each_context(priv, ctx)
602 _iwl_set_rxon_ht(priv, ht_conf, ctx);
603 }
604
605 /* Return valid, unused, channel for a passive scan to reset the RF */
606 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
607 enum ieee80211_band band)
608 {
609 const struct iwl_channel_info *ch_info;
610 int i;
611 u8 channel = 0;
612 u8 min, max;
613 struct iwl_rxon_context *ctx;
614
615 if (band == IEEE80211_BAND_5GHZ) {
616 min = 14;
617 max = priv->channel_count;
618 } else {
619 min = 0;
620 max = 14;
621 }
622
623 for (i = min; i < max; i++) {
624 bool busy = false;
625
626 for_each_context(priv, ctx) {
627 busy = priv->channel_info[i].channel ==
628 le16_to_cpu(ctx->staging.channel);
629 if (busy)
630 break;
631 }
632
633 if (busy)
634 continue;
635
636 channel = priv->channel_info[i].channel;
637 ch_info = iwl_get_channel_info(priv, band, channel);
638 if (is_channel_valid(ch_info))
639 break;
640 }
641
642 return channel;
643 }
644
645 /**
646 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
647 * @ch: requested channel as a pointer to struct ieee80211_channel
648
649 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
650 * in the staging RXON flag structure based on the ch->band
651 */
652 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
653 struct iwl_rxon_context *ctx)
654 {
655 enum ieee80211_band band = ch->band;
656 u16 channel = ch->hw_value;
657
658 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
659 (priv->band == band))
660 return 0;
661
662 ctx->staging.channel = cpu_to_le16(channel);
663 if (band == IEEE80211_BAND_5GHZ)
664 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
665 else
666 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
667
668 priv->band = band;
669
670 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
671
672 return 0;
673 }
674
675 void iwl_set_flags_for_band(struct iwl_priv *priv,
676 struct iwl_rxon_context *ctx,
677 enum ieee80211_band band,
678 struct ieee80211_vif *vif)
679 {
680 if (band == IEEE80211_BAND_5GHZ) {
681 ctx->staging.flags &=
682 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
683 | RXON_FLG_CCK_MSK);
684 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
685 } else {
686 /* Copied from iwl_post_associate() */
687 if (vif && vif->bss_conf.use_short_slot)
688 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
689 else
690 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
691
692 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
693 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
694 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
695 }
696 }
697
698 /*
699 * initialize rxon structure with default values from eeprom
700 */
701 void iwl_connection_init_rx_config(struct iwl_priv *priv,
702 struct iwl_rxon_context *ctx)
703 {
704 const struct iwl_channel_info *ch_info;
705
706 memset(&ctx->staging, 0, sizeof(ctx->staging));
707
708 if (!ctx->vif) {
709 ctx->staging.dev_type = ctx->unused_devtype;
710 } else switch (ctx->vif->type) {
711 case NL80211_IFTYPE_AP:
712 ctx->staging.dev_type = ctx->ap_devtype;
713 break;
714
715 case NL80211_IFTYPE_STATION:
716 ctx->staging.dev_type = ctx->station_devtype;
717 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
718 break;
719
720 case NL80211_IFTYPE_ADHOC:
721 ctx->staging.dev_type = ctx->ibss_devtype;
722 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
723 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
724 RXON_FILTER_ACCEPT_GRP_MSK;
725 break;
726
727 default:
728 IWL_ERR(priv, "Unsupported interface type %d\n",
729 ctx->vif->type);
730 break;
731 }
732
733 #if 0
734 /* TODO: Figure out when short_preamble would be set and cache from
735 * that */
736 if (!hw_to_local(priv->hw)->short_preamble)
737 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
738 else
739 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
740 #endif
741
742 ch_info = iwl_get_channel_info(priv, priv->band,
743 le16_to_cpu(ctx->active.channel));
744
745 if (!ch_info)
746 ch_info = &priv->channel_info[0];
747
748 ctx->staging.channel = cpu_to_le16(ch_info->channel);
749 priv->band = ch_info->band;
750
751 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
752
753 ctx->staging.ofdm_basic_rates =
754 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
755 ctx->staging.cck_basic_rates =
756 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
757
758 /* clear both MIX and PURE40 mode flag */
759 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
760 RXON_FLG_CHANNEL_MODE_PURE_40);
761 if (ctx->vif)
762 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
763
764 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
765 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
766 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
767 }
768
769 void iwl_set_rate(struct iwl_priv *priv)
770 {
771 const struct ieee80211_supported_band *hw = NULL;
772 struct ieee80211_rate *rate;
773 struct iwl_rxon_context *ctx;
774 int i;
775
776 hw = iwl_get_hw_mode(priv, priv->band);
777 if (!hw) {
778 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
779 return;
780 }
781
782 priv->active_rate = 0;
783
784 for (i = 0; i < hw->n_bitrates; i++) {
785 rate = &(hw->bitrates[i]);
786 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
787 priv->active_rate |= (1 << rate->hw_value);
788 }
789
790 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
791
792 for_each_context(priv, ctx) {
793 ctx->staging.cck_basic_rates =
794 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
795
796 ctx->staging.ofdm_basic_rates =
797 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
798 }
799 }
800
801 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
802 {
803 /*
804 * MULTI-FIXME
805 * See iwl_mac_channel_switch.
806 */
807 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
808
809 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
810 return;
811
812 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
813 ieee80211_chswitch_done(ctx->vif, is_success);
814 }
815
816 #ifdef CONFIG_IWLWIFI_DEBUG
817 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
818 struct iwl_rxon_context *ctx)
819 {
820 struct iwl_rxon_cmd *rxon = &ctx->staging;
821
822 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
823 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
824 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
825 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
826 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
827 le32_to_cpu(rxon->filter_flags));
828 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
829 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
830 rxon->ofdm_basic_rates);
831 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
832 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
833 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
834 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
835 }
836 #endif
837
838 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
839 {
840 unsigned long flags;
841 struct iwl_notification_wait *wait_entry;
842
843 spin_lock_irqsave(&priv->notif_wait_lock, flags);
844 list_for_each_entry(wait_entry, &priv->notif_waits, list)
845 wait_entry->aborted = true;
846 spin_unlock_irqrestore(&priv->notif_wait_lock, flags);
847
848 wake_up_all(&priv->notif_waitq);
849 }
850
851 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
852 {
853 unsigned int reload_msec;
854 unsigned long reload_jiffies;
855
856 /* Set the FW error flag -- cleared on iwl_down */
857 set_bit(STATUS_FW_ERROR, &priv->status);
858
859 /* Cancel currently queued command. */
860 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
861
862 iwlagn_abort_notification_waits(priv);
863
864 /* Keep the restart process from trying to send host
865 * commands by clearing the ready bit */
866 clear_bit(STATUS_READY, &priv->status);
867
868 wake_up_interruptible(&priv->wait_command_queue);
869
870 if (!ondemand) {
871 /*
872 * If firmware keep reloading, then it indicate something
873 * serious wrong and firmware having problem to recover
874 * from it. Instead of keep trying which will fill the syslog
875 * and hang the system, let's just stop it
876 */
877 reload_jiffies = jiffies;
878 reload_msec = jiffies_to_msecs((long) reload_jiffies -
879 (long) priv->reload_jiffies);
880 priv->reload_jiffies = reload_jiffies;
881 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
882 priv->reload_count++;
883 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
884 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
885 return;
886 }
887 } else
888 priv->reload_count = 0;
889 }
890
891 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
892 if (iwlagn_mod_params.restart_fw) {
893 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
894 "Restarting adapter due to uCode error.\n");
895 queue_work(priv->workqueue, &priv->restart);
896 } else
897 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
898 "Detected FW error, but not restarting\n");
899 }
900 }
901
902 /**
903 * iwl_irq_handle_error - called for HW or SW error interrupt from card
904 */
905 void iwl_irq_handle_error(struct iwl_priv *priv)
906 {
907 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
908 if (priv->cfg->internal_wimax_coex &&
909 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
910 APMS_CLK_VAL_MRB_FUNC_MODE) ||
911 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
912 APMG_PS_CTRL_VAL_RESET_REQ))) {
913 /*
914 * Keep the restart process from trying to send host
915 * commands by clearing the ready bit.
916 */
917 clear_bit(STATUS_READY, &priv->status);
918 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
919 wake_up_interruptible(&priv->wait_command_queue);
920 IWL_ERR(priv, "RF is used by WiMAX\n");
921 return;
922 }
923
924 IWL_ERR(priv, "Loaded firmware version: %s\n",
925 priv->hw->wiphy->fw_version);
926
927 iwl_dump_nic_error_log(priv);
928 iwl_dump_csr(priv);
929 iwl_dump_fh(priv, NULL, false);
930 iwl_dump_nic_event_log(priv, false, NULL, false);
931 #ifdef CONFIG_IWLWIFI_DEBUG
932 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
933 iwl_print_rx_config_cmd(priv,
934 &priv->contexts[IWL_RXON_CTX_BSS]);
935 #endif
936
937 iwlagn_fw_error(priv, false);
938 }
939
940 static int iwl_apm_stop_master(struct iwl_priv *priv)
941 {
942 int ret = 0;
943
944 /* stop device's busmaster DMA activity */
945 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
946
947 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
948 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
949 if (ret)
950 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
951
952 IWL_DEBUG_INFO(priv, "stop master\n");
953
954 return ret;
955 }
956
957 void iwl_apm_stop(struct iwl_priv *priv)
958 {
959 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
960
961 clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
962
963 /* Stop device's DMA activity */
964 iwl_apm_stop_master(priv);
965
966 /* Reset the entire device */
967 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
968
969 udelay(10);
970
971 /*
972 * Clear "initialization complete" bit to move adapter from
973 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
974 */
975 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
976 }
977
978
979 /*
980 * Start up NIC's basic functionality after it has been reset
981 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
982 * NOTE: This does not load uCode nor start the embedded processor
983 */
984 int iwl_apm_init(struct iwl_priv *priv)
985 {
986 int ret = 0;
987 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
988
989 /*
990 * Use "set_bit" below rather than "write", to preserve any hardware
991 * bits already set by default after reset.
992 */
993
994 /* Disable L0S exit timer (platform NMI Work/Around) */
995 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
996 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
997
998 /*
999 * Disable L0s without affecting L1;
1000 * don't wait for ICH L0s (ICH bug W/A)
1001 */
1002 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1003 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1004
1005 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1006 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1007
1008 /*
1009 * Enable HAP INTA (interrupt from management bus) to
1010 * wake device's PCI Express link L1a -> L0s
1011 */
1012 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1013 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1014
1015 bus_apm_config(priv->bus);
1016
1017 /* Configure analog phase-lock-loop before activating to D0A */
1018 if (priv->cfg->base_params->pll_cfg_val)
1019 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1020 priv->cfg->base_params->pll_cfg_val);
1021
1022 /*
1023 * Set "initialization complete" bit to move adapter from
1024 * D0U* --> D0A* (powered-up active) state.
1025 */
1026 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1027
1028 /*
1029 * Wait for clock stabilization; once stabilized, access to
1030 * device-internal resources is supported, e.g. iwl_write_prph()
1031 * and accesses to uCode SRAM.
1032 */
1033 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1034 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1035 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1036 if (ret < 0) {
1037 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1038 goto out;
1039 }
1040
1041 /*
1042 * Enable DMA clock and wait for it to stabilize.
1043 *
1044 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1045 * do not disable clocks. This preserves any hardware bits already
1046 * set by default in "CLK_CTRL_REG" after reset.
1047 */
1048 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1049 udelay(20);
1050
1051 /* Disable L1-Active */
1052 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1053 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1054
1055 set_bit(STATUS_DEVICE_ENABLED, &priv->status);
1056
1057 out:
1058 return ret;
1059 }
1060
1061
1062 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1063 {
1064 int ret;
1065 s8 prev_tx_power;
1066 bool defer;
1067 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1068
1069 lockdep_assert_held(&priv->mutex);
1070
1071 if (priv->tx_power_user_lmt == tx_power && !force)
1072 return 0;
1073
1074 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1075 IWL_WARN(priv,
1076 "Requested user TXPOWER %d below lower limit %d.\n",
1077 tx_power,
1078 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1079 return -EINVAL;
1080 }
1081
1082 if (tx_power > priv->tx_power_device_lmt) {
1083 IWL_WARN(priv,
1084 "Requested user TXPOWER %d above upper limit %d.\n",
1085 tx_power, priv->tx_power_device_lmt);
1086 return -EINVAL;
1087 }
1088
1089 if (!iwl_is_ready_rf(priv))
1090 return -EIO;
1091
1092 /* scan complete and commit_rxon use tx_power_next value,
1093 * it always need to be updated for newest request */
1094 priv->tx_power_next = tx_power;
1095
1096 /* do not set tx power when scanning or channel changing */
1097 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1098 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1099 if (defer && !force) {
1100 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1101 return 0;
1102 }
1103
1104 prev_tx_power = priv->tx_power_user_lmt;
1105 priv->tx_power_user_lmt = tx_power;
1106
1107 ret = iwlagn_send_tx_power(priv);
1108
1109 /* if fail to set tx_power, restore the orig. tx power */
1110 if (ret) {
1111 priv->tx_power_user_lmt = prev_tx_power;
1112 priv->tx_power_next = prev_tx_power;
1113 }
1114 return ret;
1115 }
1116
1117 void iwl_send_bt_config(struct iwl_priv *priv)
1118 {
1119 struct iwl_bt_cmd bt_cmd = {
1120 .lead_time = BT_LEAD_TIME_DEF,
1121 .max_kill = BT_MAX_KILL_DEF,
1122 .kill_ack_mask = 0,
1123 .kill_cts_mask = 0,
1124 };
1125
1126 if (!iwlagn_mod_params.bt_coex_active)
1127 bt_cmd.flags = BT_COEX_DISABLE;
1128 else
1129 bt_cmd.flags = BT_COEX_ENABLE;
1130
1131 priv->bt_enable_flag = bt_cmd.flags;
1132 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1133 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1134
1135 if (trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1136 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
1137 IWL_ERR(priv, "failed to send BT Coex Config\n");
1138 }
1139
1140 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1141 {
1142 struct iwl_statistics_cmd statistics_cmd = {
1143 .configuration_flags =
1144 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1145 };
1146
1147 if (flags & CMD_ASYNC)
1148 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1149 CMD_ASYNC,
1150 sizeof(struct iwl_statistics_cmd),
1151 &statistics_cmd);
1152 else
1153 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1154 CMD_SYNC,
1155 sizeof(struct iwl_statistics_cmd),
1156 &statistics_cmd);
1157 }
1158
1159 void iwl_clear_isr_stats(struct iwl_priv *priv)
1160 {
1161 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1162 }
1163
1164 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1165 const struct ieee80211_tx_queue_params *params)
1166 {
1167 struct iwl_priv *priv = hw->priv;
1168 struct iwl_rxon_context *ctx;
1169 unsigned long flags;
1170 int q;
1171
1172 IWL_DEBUG_MAC80211(priv, "enter\n");
1173
1174 if (!iwl_is_ready_rf(priv)) {
1175 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1176 return -EIO;
1177 }
1178
1179 if (queue >= AC_NUM) {
1180 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1181 return 0;
1182 }
1183
1184 q = AC_NUM - 1 - queue;
1185
1186 spin_lock_irqsave(&priv->lock, flags);
1187
1188 /*
1189 * MULTI-FIXME
1190 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1191 */
1192 for_each_context(priv, ctx) {
1193 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1194 cpu_to_le16(params->cw_min);
1195 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1196 cpu_to_le16(params->cw_max);
1197 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1198 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1199 cpu_to_le16((params->txop * 32));
1200
1201 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1202 }
1203
1204 spin_unlock_irqrestore(&priv->lock, flags);
1205
1206 IWL_DEBUG_MAC80211(priv, "leave\n");
1207 return 0;
1208 }
1209
1210 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1211 {
1212 struct iwl_priv *priv = hw->priv;
1213
1214 return priv->ibss_manager == IWL_IBSS_MANAGER;
1215 }
1216
1217 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1218 {
1219 iwl_connection_init_rx_config(priv, ctx);
1220
1221 iwlagn_set_rxon_chain(priv, ctx);
1222
1223 return iwlagn_commit_rxon(priv, ctx);
1224 }
1225
1226 static int iwl_setup_interface(struct iwl_priv *priv,
1227 struct iwl_rxon_context *ctx)
1228 {
1229 struct ieee80211_vif *vif = ctx->vif;
1230 int err;
1231
1232 lockdep_assert_held(&priv->mutex);
1233
1234 /*
1235 * This variable will be correct only when there's just
1236 * a single context, but all code using it is for hardware
1237 * that supports only one context.
1238 */
1239 priv->iw_mode = vif->type;
1240
1241 ctx->is_active = true;
1242
1243 err = iwl_set_mode(priv, ctx);
1244 if (err) {
1245 if (!ctx->always_active)
1246 ctx->is_active = false;
1247 return err;
1248 }
1249
1250 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1251 vif->type == NL80211_IFTYPE_ADHOC) {
1252 /*
1253 * pretend to have high BT traffic as long as we
1254 * are operating in IBSS mode, as this will cause
1255 * the rate scaling etc. to behave as intended.
1256 */
1257 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1258 }
1259
1260 return 0;
1261 }
1262
1263 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1264 {
1265 struct iwl_priv *priv = hw->priv;
1266 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1267 struct iwl_rxon_context *tmp, *ctx = NULL;
1268 int err;
1269 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1270
1271 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1272 viftype, vif->addr);
1273
1274 mutex_lock(&priv->mutex);
1275
1276 if (!iwl_is_ready_rf(priv)) {
1277 IWL_WARN(priv, "Try to add interface when device not ready\n");
1278 err = -EINVAL;
1279 goto out;
1280 }
1281
1282 for_each_context(priv, tmp) {
1283 u32 possible_modes =
1284 tmp->interface_modes | tmp->exclusive_interface_modes;
1285
1286 if (tmp->vif) {
1287 /* check if this busy context is exclusive */
1288 if (tmp->exclusive_interface_modes &
1289 BIT(tmp->vif->type)) {
1290 err = -EINVAL;
1291 goto out;
1292 }
1293 continue;
1294 }
1295
1296 if (!(possible_modes & BIT(viftype)))
1297 continue;
1298
1299 /* have maybe usable context w/o interface */
1300 ctx = tmp;
1301 break;
1302 }
1303
1304 if (!ctx) {
1305 err = -EOPNOTSUPP;
1306 goto out;
1307 }
1308
1309 vif_priv->ctx = ctx;
1310 ctx->vif = vif;
1311
1312 err = iwl_setup_interface(priv, ctx);
1313 if (!err)
1314 goto out;
1315
1316 ctx->vif = NULL;
1317 priv->iw_mode = NL80211_IFTYPE_STATION;
1318 out:
1319 mutex_unlock(&priv->mutex);
1320
1321 IWL_DEBUG_MAC80211(priv, "leave\n");
1322 return err;
1323 }
1324
1325 static void iwl_teardown_interface(struct iwl_priv *priv,
1326 struct ieee80211_vif *vif,
1327 bool mode_change)
1328 {
1329 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1330
1331 lockdep_assert_held(&priv->mutex);
1332
1333 if (priv->scan_vif == vif) {
1334 iwl_scan_cancel_timeout(priv, 200);
1335 iwl_force_scan_end(priv);
1336 }
1337
1338 if (!mode_change) {
1339 iwl_set_mode(priv, ctx);
1340 if (!ctx->always_active)
1341 ctx->is_active = false;
1342 }
1343
1344 /*
1345 * When removing the IBSS interface, overwrite the
1346 * BT traffic load with the stored one from the last
1347 * notification, if any. If this is a device that
1348 * doesn't implement this, this has no effect since
1349 * both values are the same and zero.
1350 */
1351 if (vif->type == NL80211_IFTYPE_ADHOC)
1352 priv->bt_traffic_load = priv->last_bt_traffic_load;
1353 }
1354
1355 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1356 struct ieee80211_vif *vif)
1357 {
1358 struct iwl_priv *priv = hw->priv;
1359 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1360
1361 IWL_DEBUG_MAC80211(priv, "enter\n");
1362
1363 mutex_lock(&priv->mutex);
1364
1365 WARN_ON(ctx->vif != vif);
1366 ctx->vif = NULL;
1367
1368 iwl_teardown_interface(priv, vif, false);
1369
1370 mutex_unlock(&priv->mutex);
1371
1372 IWL_DEBUG_MAC80211(priv, "leave\n");
1373
1374 }
1375
1376 #ifdef CONFIG_IWLWIFI_DEBUGFS
1377
1378 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1379
1380 void iwl_reset_traffic_log(struct iwl_priv *priv)
1381 {
1382 priv->tx_traffic_idx = 0;
1383 priv->rx_traffic_idx = 0;
1384 if (priv->tx_traffic)
1385 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1386 if (priv->rx_traffic)
1387 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1388 }
1389
1390 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1391 {
1392 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1393
1394 if (iwl_debug_level & IWL_DL_TX) {
1395 if (!priv->tx_traffic) {
1396 priv->tx_traffic =
1397 kzalloc(traffic_size, GFP_KERNEL);
1398 if (!priv->tx_traffic)
1399 return -ENOMEM;
1400 }
1401 }
1402 if (iwl_debug_level & IWL_DL_RX) {
1403 if (!priv->rx_traffic) {
1404 priv->rx_traffic =
1405 kzalloc(traffic_size, GFP_KERNEL);
1406 if (!priv->rx_traffic)
1407 return -ENOMEM;
1408 }
1409 }
1410 iwl_reset_traffic_log(priv);
1411 return 0;
1412 }
1413
1414 void iwl_free_traffic_mem(struct iwl_priv *priv)
1415 {
1416 kfree(priv->tx_traffic);
1417 priv->tx_traffic = NULL;
1418
1419 kfree(priv->rx_traffic);
1420 priv->rx_traffic = NULL;
1421 }
1422
1423 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1424 u16 length, struct ieee80211_hdr *header)
1425 {
1426 __le16 fc;
1427 u16 len;
1428
1429 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1430 return;
1431
1432 if (!priv->tx_traffic)
1433 return;
1434
1435 fc = header->frame_control;
1436 if (ieee80211_is_data(fc)) {
1437 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1438 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1439 memcpy((priv->tx_traffic +
1440 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1441 header, len);
1442 priv->tx_traffic_idx =
1443 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1444 }
1445 }
1446
1447 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1448 u16 length, struct ieee80211_hdr *header)
1449 {
1450 __le16 fc;
1451 u16 len;
1452
1453 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1454 return;
1455
1456 if (!priv->rx_traffic)
1457 return;
1458
1459 fc = header->frame_control;
1460 if (ieee80211_is_data(fc)) {
1461 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1462 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1463 memcpy((priv->rx_traffic +
1464 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1465 header, len);
1466 priv->rx_traffic_idx =
1467 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1468 }
1469 }
1470
1471 const char *get_mgmt_string(int cmd)
1472 {
1473 switch (cmd) {
1474 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1475 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1476 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1477 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1478 IWL_CMD(MANAGEMENT_PROBE_REQ);
1479 IWL_CMD(MANAGEMENT_PROBE_RESP);
1480 IWL_CMD(MANAGEMENT_BEACON);
1481 IWL_CMD(MANAGEMENT_ATIM);
1482 IWL_CMD(MANAGEMENT_DISASSOC);
1483 IWL_CMD(MANAGEMENT_AUTH);
1484 IWL_CMD(MANAGEMENT_DEAUTH);
1485 IWL_CMD(MANAGEMENT_ACTION);
1486 default:
1487 return "UNKNOWN";
1488
1489 }
1490 }
1491
1492 const char *get_ctrl_string(int cmd)
1493 {
1494 switch (cmd) {
1495 IWL_CMD(CONTROL_BACK_REQ);
1496 IWL_CMD(CONTROL_BACK);
1497 IWL_CMD(CONTROL_PSPOLL);
1498 IWL_CMD(CONTROL_RTS);
1499 IWL_CMD(CONTROL_CTS);
1500 IWL_CMD(CONTROL_ACK);
1501 IWL_CMD(CONTROL_CFEND);
1502 IWL_CMD(CONTROL_CFENDACK);
1503 default:
1504 return "UNKNOWN";
1505
1506 }
1507 }
1508
1509 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1510 {
1511 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1512 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1513 }
1514
1515 /*
1516 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1517 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1518 * Use debugFs to display the rx/rx_statistics
1519 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1520 * information will be recorded, but DATA pkt still will be recorded
1521 * for the reason of iwl_led.c need to control the led blinking based on
1522 * number of tx and rx data.
1523 *
1524 */
1525 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1526 {
1527 struct traffic_stats *stats;
1528
1529 if (is_tx)
1530 stats = &priv->tx_stats;
1531 else
1532 stats = &priv->rx_stats;
1533
1534 if (ieee80211_is_mgmt(fc)) {
1535 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1536 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1537 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1538 break;
1539 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1540 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1541 break;
1542 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1543 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1544 break;
1545 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1546 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1547 break;
1548 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1549 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1550 break;
1551 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1552 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1553 break;
1554 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1555 stats->mgmt[MANAGEMENT_BEACON]++;
1556 break;
1557 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1558 stats->mgmt[MANAGEMENT_ATIM]++;
1559 break;
1560 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1561 stats->mgmt[MANAGEMENT_DISASSOC]++;
1562 break;
1563 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1564 stats->mgmt[MANAGEMENT_AUTH]++;
1565 break;
1566 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1567 stats->mgmt[MANAGEMENT_DEAUTH]++;
1568 break;
1569 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1570 stats->mgmt[MANAGEMENT_ACTION]++;
1571 break;
1572 }
1573 } else if (ieee80211_is_ctl(fc)) {
1574 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1575 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1576 stats->ctrl[CONTROL_BACK_REQ]++;
1577 break;
1578 case cpu_to_le16(IEEE80211_STYPE_BACK):
1579 stats->ctrl[CONTROL_BACK]++;
1580 break;
1581 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1582 stats->ctrl[CONTROL_PSPOLL]++;
1583 break;
1584 case cpu_to_le16(IEEE80211_STYPE_RTS):
1585 stats->ctrl[CONTROL_RTS]++;
1586 break;
1587 case cpu_to_le16(IEEE80211_STYPE_CTS):
1588 stats->ctrl[CONTROL_CTS]++;
1589 break;
1590 case cpu_to_le16(IEEE80211_STYPE_ACK):
1591 stats->ctrl[CONTROL_ACK]++;
1592 break;
1593 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1594 stats->ctrl[CONTROL_CFEND]++;
1595 break;
1596 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1597 stats->ctrl[CONTROL_CFENDACK]++;
1598 break;
1599 }
1600 } else {
1601 /* data */
1602 stats->data_cnt++;
1603 stats->data_bytes += len;
1604 }
1605 }
1606 #endif
1607
1608 static void iwl_force_rf_reset(struct iwl_priv *priv)
1609 {
1610 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1611 return;
1612
1613 if (!iwl_is_any_associated(priv)) {
1614 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1615 return;
1616 }
1617 /*
1618 * There is no easy and better way to force reset the radio,
1619 * the only known method is switching channel which will force to
1620 * reset and tune the radio.
1621 * Use internal short scan (single channel) operation to should
1622 * achieve this objective.
1623 * Driver should reset the radio when number of consecutive missed
1624 * beacon, or any other uCode error condition detected.
1625 */
1626 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1627 iwl_internal_short_hw_scan(priv);
1628 }
1629
1630
1631 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1632 {
1633 struct iwl_force_reset *force_reset;
1634
1635 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1636 return -EINVAL;
1637
1638 if (mode >= IWL_MAX_FORCE_RESET) {
1639 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1640 return -EINVAL;
1641 }
1642 force_reset = &priv->force_reset[mode];
1643 force_reset->reset_request_count++;
1644 if (!external) {
1645 if (force_reset->last_force_reset_jiffies &&
1646 time_after(force_reset->last_force_reset_jiffies +
1647 force_reset->reset_duration, jiffies)) {
1648 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1649 force_reset->reset_reject_count++;
1650 return -EAGAIN;
1651 }
1652 }
1653 force_reset->reset_success_count++;
1654 force_reset->last_force_reset_jiffies = jiffies;
1655 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1656 switch (mode) {
1657 case IWL_RF_RESET:
1658 iwl_force_rf_reset(priv);
1659 break;
1660 case IWL_FW_RESET:
1661 /*
1662 * if the request is from external(ex: debugfs),
1663 * then always perform the request in regardless the module
1664 * parameter setting
1665 * if the request is from internal (uCode error or driver
1666 * detect failure), then fw_restart module parameter
1667 * need to be check before performing firmware reload
1668 */
1669 if (!external && !iwlagn_mod_params.restart_fw) {
1670 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1671 "module parameter setting\n");
1672 break;
1673 }
1674 IWL_ERR(priv, "On demand firmware reload\n");
1675 iwlagn_fw_error(priv, true);
1676 break;
1677 }
1678 return 0;
1679 }
1680
1681 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1682 enum nl80211_iftype newtype, bool newp2p)
1683 {
1684 struct iwl_priv *priv = hw->priv;
1685 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1686 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1687 struct iwl_rxon_context *tmp;
1688 enum nl80211_iftype newviftype = newtype;
1689 u32 interface_modes;
1690 int err;
1691
1692 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1693
1694 mutex_lock(&priv->mutex);
1695
1696 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1697 /*
1698 * Huh? But wait ... this can maybe happen when
1699 * we're in the middle of a firmware restart!
1700 */
1701 err = -EBUSY;
1702 goto out;
1703 }
1704
1705 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1706
1707 if (!(interface_modes & BIT(newtype))) {
1708 err = -EBUSY;
1709 goto out;
1710 }
1711
1712 /*
1713 * Refuse a change that should be done by moving from the PAN
1714 * context to the BSS context instead, if the BSS context is
1715 * available and can support the new interface type.
1716 */
1717 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1718 (bss_ctx->interface_modes & BIT(newtype) ||
1719 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1720 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1721 err = -EBUSY;
1722 goto out;
1723 }
1724
1725 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1726 for_each_context(priv, tmp) {
1727 if (ctx == tmp)
1728 continue;
1729
1730 if (!tmp->vif)
1731 continue;
1732
1733 /*
1734 * The current mode switch would be exclusive, but
1735 * another context is active ... refuse the switch.
1736 */
1737 err = -EBUSY;
1738 goto out;
1739 }
1740 }
1741
1742 /* success */
1743 iwl_teardown_interface(priv, vif, true);
1744 vif->type = newviftype;
1745 vif->p2p = newp2p;
1746 err = iwl_setup_interface(priv, ctx);
1747 WARN_ON(err);
1748 /*
1749 * We've switched internally, but submitting to the
1750 * device may have failed for some reason. Mask this
1751 * error, because otherwise mac80211 will not switch
1752 * (and set the interface type back) and we'll be
1753 * out of sync with it.
1754 */
1755 err = 0;
1756
1757 out:
1758 mutex_unlock(&priv->mutex);
1759 return err;
1760 }
1761
1762 /*
1763 * On every watchdog tick we check (latest) time stamp. If it does not
1764 * change during timeout period and queue is not empty we reset firmware.
1765 */
1766 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1767 {
1768 struct iwl_tx_queue *txq = &priv->txq[cnt];
1769 struct iwl_queue *q = &txq->q;
1770 unsigned long timeout;
1771 int ret;
1772
1773 if (q->read_ptr == q->write_ptr) {
1774 txq->time_stamp = jiffies;
1775 return 0;
1776 }
1777
1778 timeout = txq->time_stamp +
1779 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1780
1781 if (time_after(jiffies, timeout)) {
1782 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1783 q->id, priv->cfg->base_params->wd_timeout);
1784 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1785 return (ret == -EAGAIN) ? 0 : 1;
1786 }
1787
1788 return 0;
1789 }
1790
1791 /*
1792 * Making watchdog tick be a quarter of timeout assure we will
1793 * discover the queue hung between timeout and 1.25*timeout
1794 */
1795 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1796
1797 /*
1798 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1799 * we reset the firmware. If everything is fine just rearm the timer.
1800 */
1801 void iwl_bg_watchdog(unsigned long data)
1802 {
1803 struct iwl_priv *priv = (struct iwl_priv *)data;
1804 int cnt;
1805 unsigned long timeout;
1806
1807 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1808 return;
1809
1810 timeout = priv->cfg->base_params->wd_timeout;
1811 if (timeout == 0)
1812 return;
1813
1814 /* monitor and check for stuck cmd queue */
1815 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1816 return;
1817
1818 /* monitor and check for other stuck queues */
1819 if (iwl_is_any_associated(priv)) {
1820 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1821 /* skip as we already checked the command queue */
1822 if (cnt == priv->cmd_queue)
1823 continue;
1824 if (iwl_check_stuck_queue(priv, cnt))
1825 return;
1826 }
1827 }
1828
1829 mod_timer(&priv->watchdog, jiffies +
1830 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1831 }
1832
1833 void iwl_setup_watchdog(struct iwl_priv *priv)
1834 {
1835 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1836
1837 if (timeout && !iwlagn_mod_params.wd_disable)
1838 mod_timer(&priv->watchdog,
1839 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1840 else
1841 del_timer(&priv->watchdog);
1842 }
1843
1844 /*
1845 * extended beacon time format
1846 * time in usec will be changed into a 32-bit value in extended:internal format
1847 * the extended part is the beacon counts
1848 * the internal part is the time in usec within one beacon interval
1849 */
1850 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1851 {
1852 u32 quot;
1853 u32 rem;
1854 u32 interval = beacon_interval * TIME_UNIT;
1855
1856 if (!interval || !usec)
1857 return 0;
1858
1859 quot = (usec / interval) &
1860 (iwl_beacon_time_mask_high(priv,
1861 priv->hw_params.beacon_time_tsf_bits) >>
1862 priv->hw_params.beacon_time_tsf_bits);
1863 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1864 priv->hw_params.beacon_time_tsf_bits);
1865
1866 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1867 }
1868
1869 /* base is usually what we get from ucode with each received frame,
1870 * the same as HW timer counter counting down
1871 */
1872 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1873 u32 addon, u32 beacon_interval)
1874 {
1875 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1876 priv->hw_params.beacon_time_tsf_bits);
1877 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1878 priv->hw_params.beacon_time_tsf_bits);
1879 u32 interval = beacon_interval * TIME_UNIT;
1880 u32 res = (base & iwl_beacon_time_mask_high(priv,
1881 priv->hw_params.beacon_time_tsf_bits)) +
1882 (addon & iwl_beacon_time_mask_high(priv,
1883 priv->hw_params.beacon_time_tsf_bits));
1884
1885 if (base_low > addon_low)
1886 res += base_low - addon_low;
1887 else if (base_low < addon_low) {
1888 res += interval + base_low - addon_low;
1889 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1890 } else
1891 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1892
1893 return cpu_to_le32(res);
1894 }
1895
1896 #ifdef CONFIG_PM
1897
1898 int iwl_suspend(struct iwl_priv *priv)
1899 {
1900 /*
1901 * This function is called when system goes into suspend state
1902 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1903 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1904 * it will not call apm_ops.stop() to stop the DMA operation.
1905 * Calling apm_ops.stop here to make sure we stop the DMA.
1906 */
1907 iwl_apm_stop(priv);
1908
1909 return 0;
1910 }
1911
1912 int iwl_resume(struct iwl_priv *priv)
1913 {
1914 bool hw_rfkill = false;
1915
1916 iwl_enable_interrupts(priv);
1917
1918 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1919 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1920 hw_rfkill = true;
1921
1922 if (hw_rfkill)
1923 set_bit(STATUS_RF_KILL_HW, &priv->status);
1924 else
1925 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1926
1927 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1928
1929 return 0;
1930 }
1931
1932 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree