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Merge branch 'next/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[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-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 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 trans_send_cmd_pdu(&priv->trans, 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->status))
812 return;
813
814 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
815 ieee80211_chswitch_done(ctx->vif, is_success);
816 }
817
818 #ifdef CONFIG_IWLWIFI_DEBUG
819 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
820 struct iwl_rxon_context *ctx)
821 {
822 struct iwl_rxon_cmd *rxon = &ctx->staging;
823
824 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
825 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
826 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
827 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
828 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
829 le32_to_cpu(rxon->filter_flags));
830 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
831 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
832 rxon->ofdm_basic_rates);
833 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
834 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
835 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
836 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
837 }
838 #endif
839
840 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
841 {
842 unsigned long flags;
843 struct iwl_notification_wait *wait_entry;
844
845 spin_lock_irqsave(&priv->notif_wait_lock, flags);
846 list_for_each_entry(wait_entry, &priv->notif_waits, list)
847 wait_entry->aborted = true;
848 spin_unlock_irqrestore(&priv->notif_wait_lock, flags);
849
850 wake_up_all(&priv->notif_waitq);
851 }
852
853 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
854 {
855 unsigned int reload_msec;
856 unsigned long reload_jiffies;
857
858 /* Set the FW error flag -- cleared on iwl_down */
859 set_bit(STATUS_FW_ERROR, &priv->status);
860
861 /* Cancel currently queued command. */
862 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
863
864 iwlagn_abort_notification_waits(priv);
865
866 /* Keep the restart process from trying to send host
867 * commands by clearing the ready bit */
868 clear_bit(STATUS_READY, &priv->status);
869
870 wake_up_interruptible(&priv->wait_command_queue);
871
872 if (!ondemand) {
873 /*
874 * If firmware keep reloading, then it indicate something
875 * serious wrong and firmware having problem to recover
876 * from it. Instead of keep trying which will fill the syslog
877 * and hang the system, let's just stop it
878 */
879 reload_jiffies = jiffies;
880 reload_msec = jiffies_to_msecs((long) reload_jiffies -
881 (long) priv->reload_jiffies);
882 priv->reload_jiffies = reload_jiffies;
883 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
884 priv->reload_count++;
885 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
886 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
887 return;
888 }
889 } else
890 priv->reload_count = 0;
891 }
892
893 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
894 if (iwlagn_mod_params.restart_fw) {
895 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
896 "Restarting adapter due to uCode error.\n");
897 queue_work(priv->workqueue, &priv->restart);
898 } else
899 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
900 "Detected FW error, but not restarting\n");
901 }
902 }
903
904 /**
905 * iwl_irq_handle_error - called for HW or SW error interrupt from card
906 */
907 void iwl_irq_handle_error(struct iwl_priv *priv)
908 {
909 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
910 if (priv->cfg->internal_wimax_coex &&
911 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
912 APMS_CLK_VAL_MRB_FUNC_MODE) ||
913 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
914 APMG_PS_CTRL_VAL_RESET_REQ))) {
915 /*
916 * Keep the restart process from trying to send host
917 * commands by clearing the ready bit.
918 */
919 clear_bit(STATUS_READY, &priv->status);
920 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
921 wake_up_interruptible(&priv->wait_command_queue);
922 IWL_ERR(priv, "RF is used by WiMAX\n");
923 return;
924 }
925
926 IWL_ERR(priv, "Loaded firmware version: %s\n",
927 priv->hw->wiphy->fw_version);
928
929 iwl_dump_nic_error_log(priv);
930 iwl_dump_csr(priv);
931 iwl_dump_fh(priv, NULL, false);
932 iwl_dump_nic_event_log(priv, false, NULL, false);
933 #ifdef CONFIG_IWLWIFI_DEBUG
934 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
935 iwl_print_rx_config_cmd(priv,
936 &priv->contexts[IWL_RXON_CTX_BSS]);
937 #endif
938
939 iwlagn_fw_error(priv, false);
940 }
941
942 static int iwl_apm_stop_master(struct iwl_priv *priv)
943 {
944 int ret = 0;
945
946 /* stop device's busmaster DMA activity */
947 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
948
949 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
950 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
951 if (ret)
952 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
953
954 IWL_DEBUG_INFO(priv, "stop master\n");
955
956 return ret;
957 }
958
959 void iwl_apm_stop(struct iwl_priv *priv)
960 {
961 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
962
963 clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
964
965 /* Stop device's DMA activity */
966 iwl_apm_stop_master(priv);
967
968 /* Reset the entire device */
969 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
970
971 udelay(10);
972
973 /*
974 * Clear "initialization complete" bit to move adapter from
975 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
976 */
977 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
978 }
979
980
981 /*
982 * Start up NIC's basic functionality after it has been reset
983 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
984 * NOTE: This does not load uCode nor start the embedded processor
985 */
986 int iwl_apm_init(struct iwl_priv *priv)
987 {
988 int ret = 0;
989 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
990
991 /*
992 * Use "set_bit" below rather than "write", to preserve any hardware
993 * bits already set by default after reset.
994 */
995
996 /* Disable L0S exit timer (platform NMI Work/Around) */
997 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
998 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
999
1000 /*
1001 * Disable L0s without affecting L1;
1002 * don't wait for ICH L0s (ICH bug W/A)
1003 */
1004 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1005 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1006
1007 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1008 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1009
1010 /*
1011 * Enable HAP INTA (interrupt from management bus) to
1012 * wake device's PCI Express link L1a -> L0s
1013 */
1014 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1015 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1016
1017 bus_apm_config(priv->bus);
1018
1019 /* Configure analog phase-lock-loop before activating to D0A */
1020 if (priv->cfg->base_params->pll_cfg_val)
1021 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1022 priv->cfg->base_params->pll_cfg_val);
1023
1024 /*
1025 * Set "initialization complete" bit to move adapter from
1026 * D0U* --> D0A* (powered-up active) state.
1027 */
1028 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1029
1030 /*
1031 * Wait for clock stabilization; once stabilized, access to
1032 * device-internal resources is supported, e.g. iwl_write_prph()
1033 * and accesses to uCode SRAM.
1034 */
1035 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1036 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1037 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1038 if (ret < 0) {
1039 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1040 goto out;
1041 }
1042
1043 /*
1044 * Enable DMA clock and wait for it to stabilize.
1045 *
1046 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1047 * do not disable clocks. This preserves any hardware bits already
1048 * set by default in "CLK_CTRL_REG" after reset.
1049 */
1050 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1051 udelay(20);
1052
1053 /* Disable L1-Active */
1054 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1055 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1056
1057 set_bit(STATUS_DEVICE_ENABLED, &priv->status);
1058
1059 out:
1060 return ret;
1061 }
1062
1063
1064 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1065 {
1066 int ret;
1067 s8 prev_tx_power;
1068 bool defer;
1069 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1070
1071 lockdep_assert_held(&priv->mutex);
1072
1073 if (priv->tx_power_user_lmt == tx_power && !force)
1074 return 0;
1075
1076 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1077 IWL_WARN(priv,
1078 "Requested user TXPOWER %d below lower limit %d.\n",
1079 tx_power,
1080 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1081 return -EINVAL;
1082 }
1083
1084 if (tx_power > priv->tx_power_device_lmt) {
1085 IWL_WARN(priv,
1086 "Requested user TXPOWER %d above upper limit %d.\n",
1087 tx_power, priv->tx_power_device_lmt);
1088 return -EINVAL;
1089 }
1090
1091 if (!iwl_is_ready_rf(priv))
1092 return -EIO;
1093
1094 /* scan complete and commit_rxon use tx_power_next value,
1095 * it always need to be updated for newest request */
1096 priv->tx_power_next = tx_power;
1097
1098 /* do not set tx power when scanning or channel changing */
1099 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1100 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1101 if (defer && !force) {
1102 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1103 return 0;
1104 }
1105
1106 prev_tx_power = priv->tx_power_user_lmt;
1107 priv->tx_power_user_lmt = tx_power;
1108
1109 ret = iwlagn_send_tx_power(priv);
1110
1111 /* if fail to set tx_power, restore the orig. tx power */
1112 if (ret) {
1113 priv->tx_power_user_lmt = prev_tx_power;
1114 priv->tx_power_next = prev_tx_power;
1115 }
1116 return ret;
1117 }
1118
1119 void iwl_send_bt_config(struct iwl_priv *priv)
1120 {
1121 struct iwl_bt_cmd bt_cmd = {
1122 .lead_time = BT_LEAD_TIME_DEF,
1123 .max_kill = BT_MAX_KILL_DEF,
1124 .kill_ack_mask = 0,
1125 .kill_cts_mask = 0,
1126 };
1127
1128 if (!iwlagn_mod_params.bt_coex_active)
1129 bt_cmd.flags = BT_COEX_DISABLE;
1130 else
1131 bt_cmd.flags = BT_COEX_ENABLE;
1132
1133 priv->bt_enable_flag = bt_cmd.flags;
1134 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1135 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1136
1137 if (trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1138 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
1139 IWL_ERR(priv, "failed to send BT Coex Config\n");
1140 }
1141
1142 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1143 {
1144 struct iwl_statistics_cmd statistics_cmd = {
1145 .configuration_flags =
1146 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1147 };
1148
1149 if (flags & CMD_ASYNC)
1150 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1151 CMD_ASYNC,
1152 sizeof(struct iwl_statistics_cmd),
1153 &statistics_cmd);
1154 else
1155 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1156 CMD_SYNC,
1157 sizeof(struct iwl_statistics_cmd),
1158 &statistics_cmd);
1159 }
1160
1161 void iwl_clear_isr_stats(struct iwl_priv *priv)
1162 {
1163 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1164 }
1165
1166 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1167 const struct ieee80211_tx_queue_params *params)
1168 {
1169 struct iwl_priv *priv = hw->priv;
1170 struct iwl_rxon_context *ctx;
1171 unsigned long flags;
1172 int q;
1173
1174 IWL_DEBUG_MAC80211(priv, "enter\n");
1175
1176 if (!iwl_is_ready_rf(priv)) {
1177 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1178 return -EIO;
1179 }
1180
1181 if (queue >= AC_NUM) {
1182 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1183 return 0;
1184 }
1185
1186 q = AC_NUM - 1 - queue;
1187
1188 spin_lock_irqsave(&priv->lock, flags);
1189
1190 /*
1191 * MULTI-FIXME
1192 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1193 */
1194 for_each_context(priv, ctx) {
1195 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1196 cpu_to_le16(params->cw_min);
1197 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1198 cpu_to_le16(params->cw_max);
1199 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1200 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1201 cpu_to_le16((params->txop * 32));
1202
1203 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1204 }
1205
1206 spin_unlock_irqrestore(&priv->lock, flags);
1207
1208 IWL_DEBUG_MAC80211(priv, "leave\n");
1209 return 0;
1210 }
1211
1212 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1213 {
1214 struct iwl_priv *priv = hw->priv;
1215
1216 return priv->ibss_manager == IWL_IBSS_MANAGER;
1217 }
1218
1219 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1220 {
1221 iwl_connection_init_rx_config(priv, ctx);
1222
1223 iwlagn_set_rxon_chain(priv, ctx);
1224
1225 return iwlagn_commit_rxon(priv, ctx);
1226 }
1227
1228 static int iwl_setup_interface(struct iwl_priv *priv,
1229 struct iwl_rxon_context *ctx)
1230 {
1231 struct ieee80211_vif *vif = ctx->vif;
1232 int err;
1233
1234 lockdep_assert_held(&priv->mutex);
1235
1236 /*
1237 * This variable will be correct only when there's just
1238 * a single context, but all code using it is for hardware
1239 * that supports only one context.
1240 */
1241 priv->iw_mode = vif->type;
1242
1243 ctx->is_active = true;
1244
1245 err = iwl_set_mode(priv, ctx);
1246 if (err) {
1247 if (!ctx->always_active)
1248 ctx->is_active = false;
1249 return err;
1250 }
1251
1252 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1253 vif->type == NL80211_IFTYPE_ADHOC) {
1254 /*
1255 * pretend to have high BT traffic as long as we
1256 * are operating in IBSS mode, as this will cause
1257 * the rate scaling etc. to behave as intended.
1258 */
1259 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1260 }
1261
1262 return 0;
1263 }
1264
1265 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1266 {
1267 struct iwl_priv *priv = hw->priv;
1268 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1269 struct iwl_rxon_context *tmp, *ctx = NULL;
1270 int err;
1271 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1272
1273 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1274 viftype, vif->addr);
1275
1276 mutex_lock(&priv->mutex);
1277
1278 if (!iwl_is_ready_rf(priv)) {
1279 IWL_WARN(priv, "Try to add interface when device not ready\n");
1280 err = -EINVAL;
1281 goto out;
1282 }
1283
1284 for_each_context(priv, tmp) {
1285 u32 possible_modes =
1286 tmp->interface_modes | tmp->exclusive_interface_modes;
1287
1288 if (tmp->vif) {
1289 /* check if this busy context is exclusive */
1290 if (tmp->exclusive_interface_modes &
1291 BIT(tmp->vif->type)) {
1292 err = -EINVAL;
1293 goto out;
1294 }
1295 continue;
1296 }
1297
1298 if (!(possible_modes & BIT(viftype)))
1299 continue;
1300
1301 /* have maybe usable context w/o interface */
1302 ctx = tmp;
1303 break;
1304 }
1305
1306 if (!ctx) {
1307 err = -EOPNOTSUPP;
1308 goto out;
1309 }
1310
1311 vif_priv->ctx = ctx;
1312 ctx->vif = vif;
1313
1314 err = iwl_setup_interface(priv, ctx);
1315 if (!err)
1316 goto out;
1317
1318 ctx->vif = NULL;
1319 priv->iw_mode = NL80211_IFTYPE_STATION;
1320 out:
1321 mutex_unlock(&priv->mutex);
1322
1323 IWL_DEBUG_MAC80211(priv, "leave\n");
1324 return err;
1325 }
1326
1327 static void iwl_teardown_interface(struct iwl_priv *priv,
1328 struct ieee80211_vif *vif,
1329 bool mode_change)
1330 {
1331 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1332
1333 lockdep_assert_held(&priv->mutex);
1334
1335 if (priv->scan_vif == vif) {
1336 iwl_scan_cancel_timeout(priv, 200);
1337 iwl_force_scan_end(priv);
1338 }
1339
1340 if (!mode_change) {
1341 iwl_set_mode(priv, ctx);
1342 if (!ctx->always_active)
1343 ctx->is_active = false;
1344 }
1345
1346 /*
1347 * When removing the IBSS interface, overwrite the
1348 * BT traffic load with the stored one from the last
1349 * notification, if any. If this is a device that
1350 * doesn't implement this, this has no effect since
1351 * both values are the same and zero.
1352 */
1353 if (vif->type == NL80211_IFTYPE_ADHOC)
1354 priv->bt_traffic_load = priv->last_bt_traffic_load;
1355 }
1356
1357 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1358 struct ieee80211_vif *vif)
1359 {
1360 struct iwl_priv *priv = hw->priv;
1361 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1362
1363 IWL_DEBUG_MAC80211(priv, "enter\n");
1364
1365 mutex_lock(&priv->mutex);
1366
1367 WARN_ON(ctx->vif != vif);
1368 ctx->vif = NULL;
1369
1370 iwl_teardown_interface(priv, vif, false);
1371
1372 mutex_unlock(&priv->mutex);
1373
1374 IWL_DEBUG_MAC80211(priv, "leave\n");
1375
1376 }
1377
1378 #ifdef CONFIG_IWLWIFI_DEBUGFS
1379
1380 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1381
1382 void iwl_reset_traffic_log(struct iwl_priv *priv)
1383 {
1384 priv->tx_traffic_idx = 0;
1385 priv->rx_traffic_idx = 0;
1386 if (priv->tx_traffic)
1387 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1388 if (priv->rx_traffic)
1389 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1390 }
1391
1392 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1393 {
1394 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1395
1396 if (iwl_debug_level & IWL_DL_TX) {
1397 if (!priv->tx_traffic) {
1398 priv->tx_traffic =
1399 kzalloc(traffic_size, GFP_KERNEL);
1400 if (!priv->tx_traffic)
1401 return -ENOMEM;
1402 }
1403 }
1404 if (iwl_debug_level & IWL_DL_RX) {
1405 if (!priv->rx_traffic) {
1406 priv->rx_traffic =
1407 kzalloc(traffic_size, GFP_KERNEL);
1408 if (!priv->rx_traffic)
1409 return -ENOMEM;
1410 }
1411 }
1412 iwl_reset_traffic_log(priv);
1413 return 0;
1414 }
1415
1416 void iwl_free_traffic_mem(struct iwl_priv *priv)
1417 {
1418 kfree(priv->tx_traffic);
1419 priv->tx_traffic = NULL;
1420
1421 kfree(priv->rx_traffic);
1422 priv->rx_traffic = NULL;
1423 }
1424
1425 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1426 u16 length, struct ieee80211_hdr *header)
1427 {
1428 __le16 fc;
1429 u16 len;
1430
1431 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1432 return;
1433
1434 if (!priv->tx_traffic)
1435 return;
1436
1437 fc = header->frame_control;
1438 if (ieee80211_is_data(fc)) {
1439 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1440 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1441 memcpy((priv->tx_traffic +
1442 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1443 header, len);
1444 priv->tx_traffic_idx =
1445 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1446 }
1447 }
1448
1449 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1450 u16 length, struct ieee80211_hdr *header)
1451 {
1452 __le16 fc;
1453 u16 len;
1454
1455 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1456 return;
1457
1458 if (!priv->rx_traffic)
1459 return;
1460
1461 fc = header->frame_control;
1462 if (ieee80211_is_data(fc)) {
1463 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1464 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1465 memcpy((priv->rx_traffic +
1466 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1467 header, len);
1468 priv->rx_traffic_idx =
1469 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1470 }
1471 }
1472
1473 const char *get_mgmt_string(int cmd)
1474 {
1475 switch (cmd) {
1476 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1477 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1478 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1479 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1480 IWL_CMD(MANAGEMENT_PROBE_REQ);
1481 IWL_CMD(MANAGEMENT_PROBE_RESP);
1482 IWL_CMD(MANAGEMENT_BEACON);
1483 IWL_CMD(MANAGEMENT_ATIM);
1484 IWL_CMD(MANAGEMENT_DISASSOC);
1485 IWL_CMD(MANAGEMENT_AUTH);
1486 IWL_CMD(MANAGEMENT_DEAUTH);
1487 IWL_CMD(MANAGEMENT_ACTION);
1488 default:
1489 return "UNKNOWN";
1490
1491 }
1492 }
1493
1494 const char *get_ctrl_string(int cmd)
1495 {
1496 switch (cmd) {
1497 IWL_CMD(CONTROL_BACK_REQ);
1498 IWL_CMD(CONTROL_BACK);
1499 IWL_CMD(CONTROL_PSPOLL);
1500 IWL_CMD(CONTROL_RTS);
1501 IWL_CMD(CONTROL_CTS);
1502 IWL_CMD(CONTROL_ACK);
1503 IWL_CMD(CONTROL_CFEND);
1504 IWL_CMD(CONTROL_CFENDACK);
1505 default:
1506 return "UNKNOWN";
1507
1508 }
1509 }
1510
1511 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1512 {
1513 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1514 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1515 }
1516
1517 /*
1518 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1519 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1520 * Use debugFs to display the rx/rx_statistics
1521 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1522 * information will be recorded, but DATA pkt still will be recorded
1523 * for the reason of iwl_led.c need to control the led blinking based on
1524 * number of tx and rx data.
1525 *
1526 */
1527 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1528 {
1529 struct traffic_stats *stats;
1530
1531 if (is_tx)
1532 stats = &priv->tx_stats;
1533 else
1534 stats = &priv->rx_stats;
1535
1536 if (ieee80211_is_mgmt(fc)) {
1537 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1538 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1539 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1540 break;
1541 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1542 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1543 break;
1544 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1545 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1546 break;
1547 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1548 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1549 break;
1550 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1551 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1552 break;
1553 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1554 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1555 break;
1556 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1557 stats->mgmt[MANAGEMENT_BEACON]++;
1558 break;
1559 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1560 stats->mgmt[MANAGEMENT_ATIM]++;
1561 break;
1562 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1563 stats->mgmt[MANAGEMENT_DISASSOC]++;
1564 break;
1565 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1566 stats->mgmt[MANAGEMENT_AUTH]++;
1567 break;
1568 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1569 stats->mgmt[MANAGEMENT_DEAUTH]++;
1570 break;
1571 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1572 stats->mgmt[MANAGEMENT_ACTION]++;
1573 break;
1574 }
1575 } else if (ieee80211_is_ctl(fc)) {
1576 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1577 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1578 stats->ctrl[CONTROL_BACK_REQ]++;
1579 break;
1580 case cpu_to_le16(IEEE80211_STYPE_BACK):
1581 stats->ctrl[CONTROL_BACK]++;
1582 break;
1583 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1584 stats->ctrl[CONTROL_PSPOLL]++;
1585 break;
1586 case cpu_to_le16(IEEE80211_STYPE_RTS):
1587 stats->ctrl[CONTROL_RTS]++;
1588 break;
1589 case cpu_to_le16(IEEE80211_STYPE_CTS):
1590 stats->ctrl[CONTROL_CTS]++;
1591 break;
1592 case cpu_to_le16(IEEE80211_STYPE_ACK):
1593 stats->ctrl[CONTROL_ACK]++;
1594 break;
1595 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1596 stats->ctrl[CONTROL_CFEND]++;
1597 break;
1598 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1599 stats->ctrl[CONTROL_CFENDACK]++;
1600 break;
1601 }
1602 } else {
1603 /* data */
1604 stats->data_cnt++;
1605 stats->data_bytes += len;
1606 }
1607 }
1608 #endif
1609
1610 static void iwl_force_rf_reset(struct iwl_priv *priv)
1611 {
1612 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1613 return;
1614
1615 if (!iwl_is_any_associated(priv)) {
1616 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1617 return;
1618 }
1619 /*
1620 * There is no easy and better way to force reset the radio,
1621 * the only known method is switching channel which will force to
1622 * reset and tune the radio.
1623 * Use internal short scan (single channel) operation to should
1624 * achieve this objective.
1625 * Driver should reset the radio when number of consecutive missed
1626 * beacon, or any other uCode error condition detected.
1627 */
1628 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1629 iwl_internal_short_hw_scan(priv);
1630 }
1631
1632
1633 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1634 {
1635 struct iwl_force_reset *force_reset;
1636
1637 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1638 return -EINVAL;
1639
1640 if (mode >= IWL_MAX_FORCE_RESET) {
1641 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1642 return -EINVAL;
1643 }
1644 force_reset = &priv->force_reset[mode];
1645 force_reset->reset_request_count++;
1646 if (!external) {
1647 if (force_reset->last_force_reset_jiffies &&
1648 time_after(force_reset->last_force_reset_jiffies +
1649 force_reset->reset_duration, jiffies)) {
1650 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1651 force_reset->reset_reject_count++;
1652 return -EAGAIN;
1653 }
1654 }
1655 force_reset->reset_success_count++;
1656 force_reset->last_force_reset_jiffies = jiffies;
1657 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1658 switch (mode) {
1659 case IWL_RF_RESET:
1660 iwl_force_rf_reset(priv);
1661 break;
1662 case IWL_FW_RESET:
1663 /*
1664 * if the request is from external(ex: debugfs),
1665 * then always perform the request in regardless the module
1666 * parameter setting
1667 * if the request is from internal (uCode error or driver
1668 * detect failure), then fw_restart module parameter
1669 * need to be check before performing firmware reload
1670 */
1671 if (!external && !iwlagn_mod_params.restart_fw) {
1672 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1673 "module parameter setting\n");
1674 break;
1675 }
1676 IWL_ERR(priv, "On demand firmware reload\n");
1677 iwlagn_fw_error(priv, true);
1678 break;
1679 }
1680 return 0;
1681 }
1682
1683 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1684 enum nl80211_iftype newtype, bool newp2p)
1685 {
1686 struct iwl_priv *priv = hw->priv;
1687 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1688 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1689 struct iwl_rxon_context *tmp;
1690 enum nl80211_iftype newviftype = newtype;
1691 u32 interface_modes;
1692 int err;
1693
1694 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1695
1696 mutex_lock(&priv->mutex);
1697
1698 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1699 /*
1700 * Huh? But wait ... this can maybe happen when
1701 * we're in the middle of a firmware restart!
1702 */
1703 err = -EBUSY;
1704 goto out;
1705 }
1706
1707 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1708
1709 if (!(interface_modes & BIT(newtype))) {
1710 err = -EBUSY;
1711 goto out;
1712 }
1713
1714 /*
1715 * Refuse a change that should be done by moving from the PAN
1716 * context to the BSS context instead, if the BSS context is
1717 * available and can support the new interface type.
1718 */
1719 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1720 (bss_ctx->interface_modes & BIT(newtype) ||
1721 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1722 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1723 err = -EBUSY;
1724 goto out;
1725 }
1726
1727 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1728 for_each_context(priv, tmp) {
1729 if (ctx == tmp)
1730 continue;
1731
1732 if (!tmp->vif)
1733 continue;
1734
1735 /*
1736 * The current mode switch would be exclusive, but
1737 * another context is active ... refuse the switch.
1738 */
1739 err = -EBUSY;
1740 goto out;
1741 }
1742 }
1743
1744 /* success */
1745 iwl_teardown_interface(priv, vif, true);
1746 vif->type = newviftype;
1747 vif->p2p = newp2p;
1748 err = iwl_setup_interface(priv, ctx);
1749 WARN_ON(err);
1750 /*
1751 * We've switched internally, but submitting to the
1752 * device may have failed for some reason. Mask this
1753 * error, because otherwise mac80211 will not switch
1754 * (and set the interface type back) and we'll be
1755 * out of sync with it.
1756 */
1757 err = 0;
1758
1759 out:
1760 mutex_unlock(&priv->mutex);
1761 return err;
1762 }
1763
1764 /*
1765 * On every watchdog tick we check (latest) time stamp. If it does not
1766 * change during timeout period and queue is not empty we reset firmware.
1767 */
1768 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1769 {
1770 struct iwl_tx_queue *txq = &priv->txq[cnt];
1771 struct iwl_queue *q = &txq->q;
1772 unsigned long timeout;
1773 int ret;
1774
1775 if (q->read_ptr == q->write_ptr) {
1776 txq->time_stamp = jiffies;
1777 return 0;
1778 }
1779
1780 timeout = txq->time_stamp +
1781 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1782
1783 if (time_after(jiffies, timeout)) {
1784 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1785 q->id, priv->cfg->base_params->wd_timeout);
1786 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1787 return (ret == -EAGAIN) ? 0 : 1;
1788 }
1789
1790 return 0;
1791 }
1792
1793 /*
1794 * Making watchdog tick be a quarter of timeout assure we will
1795 * discover the queue hung between timeout and 1.25*timeout
1796 */
1797 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1798
1799 /*
1800 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1801 * we reset the firmware. If everything is fine just rearm the timer.
1802 */
1803 void iwl_bg_watchdog(unsigned long data)
1804 {
1805 struct iwl_priv *priv = (struct iwl_priv *)data;
1806 int cnt;
1807 unsigned long timeout;
1808
1809 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1810 return;
1811
1812 timeout = priv->cfg->base_params->wd_timeout;
1813 if (timeout == 0)
1814 return;
1815
1816 /* monitor and check for stuck cmd queue */
1817 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1818 return;
1819
1820 /* monitor and check for other stuck queues */
1821 if (iwl_is_any_associated(priv)) {
1822 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1823 /* skip as we already checked the command queue */
1824 if (cnt == priv->cmd_queue)
1825 continue;
1826 if (iwl_check_stuck_queue(priv, cnt))
1827 return;
1828 }
1829 }
1830
1831 mod_timer(&priv->watchdog, jiffies +
1832 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1833 }
1834
1835 void iwl_setup_watchdog(struct iwl_priv *priv)
1836 {
1837 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1838
1839 if (timeout && !iwlagn_mod_params.wd_disable)
1840 mod_timer(&priv->watchdog,
1841 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1842 else
1843 del_timer(&priv->watchdog);
1844 }
1845
1846 /*
1847 * extended beacon time format
1848 * time in usec will be changed into a 32-bit value in extended:internal format
1849 * the extended part is the beacon counts
1850 * the internal part is the time in usec within one beacon interval
1851 */
1852 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1853 {
1854 u32 quot;
1855 u32 rem;
1856 u32 interval = beacon_interval * TIME_UNIT;
1857
1858 if (!interval || !usec)
1859 return 0;
1860
1861 quot = (usec / interval) &
1862 (iwl_beacon_time_mask_high(priv,
1863 priv->hw_params.beacon_time_tsf_bits) >>
1864 priv->hw_params.beacon_time_tsf_bits);
1865 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1866 priv->hw_params.beacon_time_tsf_bits);
1867
1868 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1869 }
1870
1871 /* base is usually what we get from ucode with each received frame,
1872 * the same as HW timer counter counting down
1873 */
1874 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1875 u32 addon, u32 beacon_interval)
1876 {
1877 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1878 priv->hw_params.beacon_time_tsf_bits);
1879 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1880 priv->hw_params.beacon_time_tsf_bits);
1881 u32 interval = beacon_interval * TIME_UNIT;
1882 u32 res = (base & iwl_beacon_time_mask_high(priv,
1883 priv->hw_params.beacon_time_tsf_bits)) +
1884 (addon & iwl_beacon_time_mask_high(priv,
1885 priv->hw_params.beacon_time_tsf_bits));
1886
1887 if (base_low > addon_low)
1888 res += base_low - addon_low;
1889 else if (base_low < addon_low) {
1890 res += interval + base_low - addon_low;
1891 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1892 } else
1893 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1894
1895 return cpu_to_le32(res);
1896 }
1897
1898 #ifdef CONFIG_PM
1899
1900 int iwl_suspend(struct iwl_priv *priv)
1901 {
1902 /*
1903 * This function is called when system goes into suspend state
1904 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1905 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1906 * it will not call apm_ops.stop() to stop the DMA operation.
1907 * Calling apm_ops.stop here to make sure we stop the DMA.
1908 *
1909 * But of course ... if we have configured WoWLAN then we did other
1910 * things already :-)
1911 */
1912 if (!priv->wowlan)
1913 iwl_apm_stop(priv);
1914
1915 return 0;
1916 }
1917
1918 int iwl_resume(struct iwl_priv *priv)
1919 {
1920 bool hw_rfkill = false;
1921
1922 iwl_enable_interrupts(priv);
1923
1924 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1925 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1926 hw_rfkill = true;
1927
1928 if (hw_rfkill)
1929 set_bit(STATUS_RF_KILL_HW, &priv->status);
1930 else
1931 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1932
1933 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1934
1935 return 0;
1936 }
1937
1938 #endif /* CONFIG_PM */
Linux kernel - Deliverables
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