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