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iwlagn: Rename iwlcore prefix
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blobe1c5f5988fef7ce3c0a49abb380cea99d93d0854
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-agn.h"
46 #include "iwl-trans.h"
47
48 u32 iwl_debug_level;
49
50 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
51
52 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
53 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
54 static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
55 struct ieee80211_sta_ht_cap *ht_info,
56 enum ieee80211_band band)
57 {
58 u16 max_bit_rate = 0;
59 u8 rx_chains_num = priv->hw_params.rx_chains_num;
60 u8 tx_chains_num = priv->hw_params.tx_chains_num;
61
62 ht_info->cap = 0;
63 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
64
65 ht_info->ht_supported = true;
66
67 if (priv->cfg->ht_params &&
68 priv->cfg->ht_params->ht_greenfield_support)
69 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
70 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
71 max_bit_rate = MAX_BIT_RATE_20_MHZ;
72 if (priv->hw_params.ht40_channel & BIT(band)) {
73 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
74 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
75 ht_info->mcs.rx_mask[4] = 0x01;
76 max_bit_rate = MAX_BIT_RATE_40_MHZ;
77 }
78
79 if (iwlagn_mod_params.amsdu_size_8K)
80 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
81
82 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
83 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
84 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
85 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
86 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
87 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
88
89 ht_info->mcs.rx_mask[0] = 0xFF;
90 if (rx_chains_num >= 2)
91 ht_info->mcs.rx_mask[1] = 0xFF;
92 if (rx_chains_num >= 3)
93 ht_info->mcs.rx_mask[2] = 0xFF;
94
95 /* Highest supported Rx data rate */
96 max_bit_rate *= rx_chains_num;
97 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
98 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
99
100 /* Tx MCS capabilities */
101 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
102 if (tx_chains_num != rx_chains_num) {
103 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
104 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
105 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
106 }
107 }
108
109 /**
110 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
111 */
112 int iwl_init_geos(struct iwl_priv *priv)
113 {
114 struct iwl_channel_info *ch;
115 struct ieee80211_supported_band *sband;
116 struct ieee80211_channel *channels;
117 struct ieee80211_channel *geo_ch;
118 struct ieee80211_rate *rates;
119 int i = 0;
120 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
121
122 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
123 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
124 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
125 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
126 return 0;
127 }
128
129 channels = kzalloc(sizeof(struct ieee80211_channel) *
130 priv->channel_count, GFP_KERNEL);
131 if (!channels)
132 return -ENOMEM;
133
134 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
135 GFP_KERNEL);
136 if (!rates) {
137 kfree(channels);
138 return -ENOMEM;
139 }
140
141 /* 5.2GHz channels start after the 2.4GHz channels */
142 sband = &priv->bands[IEEE80211_BAND_5GHZ];
143 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
144 /* just OFDM */
145 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
146 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
147
148 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
149 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
150 IEEE80211_BAND_5GHZ);
151
152 sband = &priv->bands[IEEE80211_BAND_2GHZ];
153 sband->channels = channels;
154 /* OFDM & CCK */
155 sband->bitrates = rates;
156 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
157
158 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
159 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
160 IEEE80211_BAND_2GHZ);
161
162 priv->ieee_channels = channels;
163 priv->ieee_rates = rates;
164
165 for (i = 0; i < priv->channel_count; i++) {
166 ch = &priv->channel_info[i];
167
168 /* FIXME: might be removed if scan is OK */
169 if (!is_channel_valid(ch))
170 continue;
171
172 sband = &priv->bands[ch->band];
173
174 geo_ch = &sband->channels[sband->n_channels++];
175
176 geo_ch->center_freq =
177 ieee80211_channel_to_frequency(ch->channel, ch->band);
178 geo_ch->max_power = ch->max_power_avg;
179 geo_ch->max_antenna_gain = 0xff;
180 geo_ch->hw_value = ch->channel;
181
182 if (is_channel_valid(ch)) {
183 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
184 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
185
186 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
187 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
188
189 if (ch->flags & EEPROM_CHANNEL_RADAR)
190 geo_ch->flags |= IEEE80211_CHAN_RADAR;
191
192 geo_ch->flags |= ch->ht40_extension_channel;
193
194 if (ch->max_power_avg > max_tx_power)
195 max_tx_power = ch->max_power_avg;
196 } else {
197 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
198 }
199
200 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
201 ch->channel, geo_ch->center_freq,
202 is_channel_a_band(ch) ? "5.2" : "2.4",
203 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
204 "restricted" : "valid",
205 geo_ch->flags);
206 }
207
208 priv->tx_power_device_lmt = max_tx_power;
209 priv->tx_power_user_lmt = max_tx_power;
210 priv->tx_power_next = max_tx_power;
211
212 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
213 priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
214 char buf[32];
215 bus_get_hw_id(priv->bus, buf, sizeof(buf));
216 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
217 "Please send your %s to maintainer.\n", buf);
218 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
219 }
220
221 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
222 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
223 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
224
225 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
226
227 return 0;
228 }
229
230 /*
231 * iwl_free_geos - undo allocations in iwl_init_geos
232 */
233 void iwl_free_geos(struct iwl_priv *priv)
234 {
235 kfree(priv->ieee_channels);
236 kfree(priv->ieee_rates);
237 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
238 }
239
240 static bool iwl_is_channel_extension(struct iwl_priv *priv,
241 enum ieee80211_band band,
242 u16 channel, u8 extension_chan_offset)
243 {
244 const struct iwl_channel_info *ch_info;
245
246 ch_info = iwl_get_channel_info(priv, band, channel);
247 if (!is_channel_valid(ch_info))
248 return false;
249
250 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
251 return !(ch_info->ht40_extension_channel &
252 IEEE80211_CHAN_NO_HT40PLUS);
253 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
254 return !(ch_info->ht40_extension_channel &
255 IEEE80211_CHAN_NO_HT40MINUS);
256
257 return false;
258 }
259
260 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
261 struct iwl_rxon_context *ctx,
262 struct ieee80211_sta_ht_cap *ht_cap)
263 {
264 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
265 return false;
266
267 /*
268 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
269 * the bit will not set if it is pure 40MHz case
270 */
271 if (ht_cap && !ht_cap->ht_supported)
272 return false;
273
274 #ifdef CONFIG_IWLWIFI_DEBUGFS
275 if (priv->disable_ht40)
276 return false;
277 #endif
278
279 return iwl_is_channel_extension(priv, priv->band,
280 le16_to_cpu(ctx->staging.channel),
281 ctx->ht.extension_chan_offset);
282 }
283
284 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
285 {
286 u16 new_val;
287 u16 beacon_factor;
288
289 /*
290 * If mac80211 hasn't given us a beacon interval, program
291 * the default into the device (not checking this here
292 * would cause the adjustment below to return the maximum
293 * value, which may break PAN.)
294 */
295 if (!beacon_val)
296 return DEFAULT_BEACON_INTERVAL;
297
298 /*
299 * If the beacon interval we obtained from the peer
300 * is too large, we'll have to wake up more often
301 * (and in IBSS case, we'll beacon too much)
302 *
303 * For example, if max_beacon_val is 4096, and the
304 * requested beacon interval is 7000, we'll have to
305 * use 3500 to be able to wake up on the beacons.
306 *
307 * This could badly influence beacon detection stats.
308 */
309
310 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
311 new_val = beacon_val / beacon_factor;
312
313 if (!new_val)
314 new_val = max_beacon_val;
315
316 return new_val;
317 }
318
319 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
320 {
321 u64 tsf;
322 s32 interval_tm, rem;
323 struct ieee80211_conf *conf = NULL;
324 u16 beacon_int;
325 struct ieee80211_vif *vif = ctx->vif;
326
327 conf = ieee80211_get_hw_conf(priv->hw);
328
329 lockdep_assert_held(&priv->mutex);
330
331 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
332
333 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
334 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
335
336 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
337
338 /*
339 * TODO: For IBSS we need to get atim_window from mac80211,
340 * for now just always use 0
341 */
342 ctx->timing.atim_window = 0;
343
344 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
345 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
346 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
347 priv->contexts[IWL_RXON_CTX_BSS].vif &&
348 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
349 ctx->timing.beacon_interval =
350 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
351 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
352 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
353 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
354 priv->contexts[IWL_RXON_CTX_PAN].vif &&
355 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
356 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
357 !ctx->vif->bss_conf.beacon_int)) {
358 ctx->timing.beacon_interval =
359 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
360 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
361 } else {
362 beacon_int = iwl_adjust_beacon_interval(beacon_int,
363 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
364 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
365 }
366
367 ctx->beacon_int = beacon_int;
368
369 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
370 interval_tm = beacon_int * TIME_UNIT;
371 rem = do_div(tsf, interval_tm);
372 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
373
374 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
375
376 IWL_DEBUG_ASSOC(priv,
377 "beacon interval %d beacon timer %d beacon tim %d\n",
378 le16_to_cpu(ctx->timing.beacon_interval),
379 le32_to_cpu(ctx->timing.beacon_init_val),
380 le16_to_cpu(ctx->timing.atim_window));
381
382 return trans_send_cmd_pdu(&priv->trans, ctx->rxon_timing_cmd,
383 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
384 }
385
386 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
387 int hw_decrypt)
388 {
389 struct iwl_rxon_cmd *rxon = &ctx->staging;
390
391 if (hw_decrypt)
392 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
393 else
394 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
395
396 }
397
398 /* validate RXON structure is valid */
399 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
400 {
401 struct iwl_rxon_cmd *rxon = &ctx->staging;
402 u32 errors = 0;
403
404 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
405 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
406 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
407 errors |= BIT(0);
408 }
409 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
410 IWL_WARN(priv, "check 2.4G: wrong radar\n");
411 errors |= BIT(1);
412 }
413 } else {
414 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
415 IWL_WARN(priv, "check 5.2G: not short slot!\n");
416 errors |= BIT(2);
417 }
418 if (rxon->flags & RXON_FLG_CCK_MSK) {
419 IWL_WARN(priv, "check 5.2G: CCK!\n");
420 errors |= BIT(3);
421 }
422 }
423 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
424 IWL_WARN(priv, "mac/bssid mcast!\n");
425 errors |= BIT(4);
426 }
427
428 /* make sure basic rates 6Mbps and 1Mbps are supported */
429 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
430 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
431 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
432 errors |= BIT(5);
433 }
434
435 if (le16_to_cpu(rxon->assoc_id) > 2007) {
436 IWL_WARN(priv, "aid > 2007\n");
437 errors |= BIT(6);
438 }
439
440 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
441 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
442 IWL_WARN(priv, "CCK and short slot\n");
443 errors |= BIT(7);
444 }
445
446 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
447 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
448 IWL_WARN(priv, "CCK and auto detect");
449 errors |= BIT(8);
450 }
451
452 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
453 RXON_FLG_TGG_PROTECT_MSK)) ==
454 RXON_FLG_TGG_PROTECT_MSK) {
455 IWL_WARN(priv, "TGg but no auto-detect\n");
456 errors |= BIT(9);
457 }
458
459 if (rxon->channel == 0) {
460 IWL_WARN(priv, "zero channel is invalid\n");
461 errors |= BIT(10);
462 }
463
464 WARN(errors, "Invalid RXON (%#x), channel %d",
465 errors, le16_to_cpu(rxon->channel));
466
467 return errors ? -EINVAL : 0;
468 }
469
470 /**
471 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
472 * @priv: staging_rxon is compared to active_rxon
473 *
474 * If the RXON structure is changing enough to require a new tune,
475 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
476 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
477 */
478 int iwl_full_rxon_required(struct iwl_priv *priv,
479 struct iwl_rxon_context *ctx)
480 {
481 const struct iwl_rxon_cmd *staging = &ctx->staging;
482 const struct iwl_rxon_cmd *active = &ctx->active;
483
484 #define CHK(cond) \
485 if ((cond)) { \
486 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
487 return 1; \
488 }
489
490 #define CHK_NEQ(c1, c2) \
491 if ((c1) != (c2)) { \
492 IWL_DEBUG_INFO(priv, "need full RXON - " \
493 #c1 " != " #c2 " - %d != %d\n", \
494 (c1), (c2)); \
495 return 1; \
496 }
497
498 /* These items are only settable from the full RXON command */
499 CHK(!iwl_is_associated_ctx(ctx));
500 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
501 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
502 CHK(compare_ether_addr(staging->wlap_bssid_addr,
503 active->wlap_bssid_addr));
504 CHK_NEQ(staging->dev_type, active->dev_type);
505 CHK_NEQ(staging->channel, active->channel);
506 CHK_NEQ(staging->air_propagation, active->air_propagation);
507 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
508 active->ofdm_ht_single_stream_basic_rates);
509 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
510 active->ofdm_ht_dual_stream_basic_rates);
511 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
512 active->ofdm_ht_triple_stream_basic_rates);
513 CHK_NEQ(staging->assoc_id, active->assoc_id);
514
515 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
516 * be updated with the RXON_ASSOC command -- however only some
517 * flag transitions are allowed using RXON_ASSOC */
518
519 /* Check if we are not switching bands */
520 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
521 active->flags & RXON_FLG_BAND_24G_MSK);
522
523 /* Check if we are switching association toggle */
524 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
525 active->filter_flags & RXON_FILTER_ASSOC_MSK);
526
527 #undef CHK
528 #undef CHK_NEQ
529
530 return 0;
531 }
532
533 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
534 struct iwl_ht_config *ht_conf,
535 struct iwl_rxon_context *ctx)
536 {
537 struct iwl_rxon_cmd *rxon = &ctx->staging;
538
539 if (!ctx->ht.enabled) {
540 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
541 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
542 RXON_FLG_HT40_PROT_MSK |
543 RXON_FLG_HT_PROT_MSK);
544 return;
545 }
546
547 /* FIXME: if the definition of ht.protection changed, the "translation"
548 * will be needed for rxon->flags
549 */
550 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
551
552 /* Set up channel bandwidth:
553 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
554 /* clear the HT channel mode before set the mode */
555 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
556 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
557 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
558 /* pure ht40 */
559 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
560 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
561 /* Note: control channel is opposite of extension channel */
562 switch (ctx->ht.extension_chan_offset) {
563 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
564 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
565 break;
566 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
567 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
568 break;
569 }
570 } else {
571 /* Note: control channel is opposite of extension channel */
572 switch (ctx->ht.extension_chan_offset) {
573 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
574 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
575 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
576 break;
577 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
578 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
579 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
580 break;
581 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
582 default:
583 /* channel location only valid if in Mixed mode */
584 IWL_ERR(priv, "invalid extension channel offset\n");
585 break;
586 }
587 }
588 } else {
589 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
590 }
591
592 iwlagn_set_rxon_chain(priv, ctx);
593
594 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
595 "extension channel offset 0x%x\n",
596 le32_to_cpu(rxon->flags), ctx->ht.protection,
597 ctx->ht.extension_chan_offset);
598 }
599
600 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
601 {
602 struct iwl_rxon_context *ctx;
603
604 for_each_context(priv, ctx)
605 _iwl_set_rxon_ht(priv, ht_conf, ctx);
606 }
607
608 /* Return valid, unused, channel for a passive scan to reset the RF */
609 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
610 enum ieee80211_band band)
611 {
612 const struct iwl_channel_info *ch_info;
613 int i;
614 u8 channel = 0;
615 u8 min, max;
616 struct iwl_rxon_context *ctx;
617
618 if (band == IEEE80211_BAND_5GHZ) {
619 min = 14;
620 max = priv->channel_count;
621 } else {
622 min = 0;
623 max = 14;
624 }
625
626 for (i = min; i < max; i++) {
627 bool busy = false;
628
629 for_each_context(priv, ctx) {
630 busy = priv->channel_info[i].channel ==
631 le16_to_cpu(ctx->staging.channel);
632 if (busy)
633 break;
634 }
635
636 if (busy)
637 continue;
638
639 channel = priv->channel_info[i].channel;
640 ch_info = iwl_get_channel_info(priv, band, channel);
641 if (is_channel_valid(ch_info))
642 break;
643 }
644
645 return channel;
646 }
647
648 /**
649 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
650 * @ch: requested channel as a pointer to struct ieee80211_channel
651
652 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
653 * in the staging RXON flag structure based on the ch->band
654 */
655 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
656 struct iwl_rxon_context *ctx)
657 {
658 enum ieee80211_band band = ch->band;
659 u16 channel = ch->hw_value;
660
661 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
662 (priv->band == band))
663 return 0;
664
665 ctx->staging.channel = cpu_to_le16(channel);
666 if (band == IEEE80211_BAND_5GHZ)
667 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
668 else
669 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
670
671 priv->band = band;
672
673 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
674
675 return 0;
676 }
677
678 void iwl_set_flags_for_band(struct iwl_priv *priv,
679 struct iwl_rxon_context *ctx,
680 enum ieee80211_band band,
681 struct ieee80211_vif *vif)
682 {
683 if (band == IEEE80211_BAND_5GHZ) {
684 ctx->staging.flags &=
685 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
686 | RXON_FLG_CCK_MSK);
687 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
688 } else {
689 /* Copied from iwl_post_associate() */
690 if (vif && vif->bss_conf.use_short_slot)
691 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
692 else
693 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
694
695 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
696 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
697 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
698 }
699 }
700
701 /*
702 * initialize rxon structure with default values from eeprom
703 */
704 void iwl_connection_init_rx_config(struct iwl_priv *priv,
705 struct iwl_rxon_context *ctx)
706 {
707 const struct iwl_channel_info *ch_info;
708
709 memset(&ctx->staging, 0, sizeof(ctx->staging));
710
711 if (!ctx->vif) {
712 ctx->staging.dev_type = ctx->unused_devtype;
713 } else switch (ctx->vif->type) {
714 case NL80211_IFTYPE_AP:
715 ctx->staging.dev_type = ctx->ap_devtype;
716 break;
717
718 case NL80211_IFTYPE_STATION:
719 ctx->staging.dev_type = ctx->station_devtype;
720 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
721 break;
722
723 case NL80211_IFTYPE_ADHOC:
724 ctx->staging.dev_type = ctx->ibss_devtype;
725 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
726 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
727 RXON_FILTER_ACCEPT_GRP_MSK;
728 break;
729
730 default:
731 IWL_ERR(priv, "Unsupported interface type %d\n",
732 ctx->vif->type);
733 break;
734 }
735
736 #if 0
737 /* TODO: Figure out when short_preamble would be set and cache from
738 * that */
739 if (!hw_to_local(priv->hw)->short_preamble)
740 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
741 else
742 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
743 #endif
744
745 ch_info = iwl_get_channel_info(priv, priv->band,
746 le16_to_cpu(ctx->active.channel));
747
748 if (!ch_info)
749 ch_info = &priv->channel_info[0];
750
751 ctx->staging.channel = cpu_to_le16(ch_info->channel);
752 priv->band = ch_info->band;
753
754 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
755
756 ctx->staging.ofdm_basic_rates =
757 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
758 ctx->staging.cck_basic_rates =
759 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
760
761 /* clear both MIX and PURE40 mode flag */
762 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
763 RXON_FLG_CHANNEL_MODE_PURE_40);
764 if (ctx->vif)
765 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
766
767 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
768 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
769 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
770 }
771
772 void iwl_set_rate(struct iwl_priv *priv)
773 {
774 const struct ieee80211_supported_band *hw = NULL;
775 struct ieee80211_rate *rate;
776 struct iwl_rxon_context *ctx;
777 int i;
778
779 hw = iwl_get_hw_mode(priv, priv->band);
780 if (!hw) {
781 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
782 return;
783 }
784
785 priv->active_rate = 0;
786
787 for (i = 0; i < hw->n_bitrates; i++) {
788 rate = &(hw->bitrates[i]);
789 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
790 priv->active_rate |= (1 << rate->hw_value);
791 }
792
793 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
794
795 for_each_context(priv, ctx) {
796 ctx->staging.cck_basic_rates =
797 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
798
799 ctx->staging.ofdm_basic_rates =
800 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
801 }
802 }
803
804 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
805 {
806 /*
807 * MULTI-FIXME
808 * See iwl_mac_channel_switch.
809 */
810 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
811
812 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
813 return;
814
815 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->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->status);
861
862 /* Cancel currently queued command. */
863 clear_bit(STATUS_HCMD_ACTIVE, &priv->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->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->status)) {
895 if (iwlagn_mod_params.restart_fw) {
896 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
897 "Restarting adapter due to uCode error.\n");
898 queue_work(priv->workqueue, &priv->restart);
899 } else
900 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
901 "Detected FW error, but not restarting\n");
902 }
903 }
904
905 /**
906 * iwl_irq_handle_error - called for HW or SW error interrupt from card
907 */
908 void iwl_irq_handle_error(struct iwl_priv *priv)
909 {
910 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
911 if (priv->cfg->internal_wimax_coex &&
912 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
913 APMS_CLK_VAL_MRB_FUNC_MODE) ||
914 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
915 APMG_PS_CTRL_VAL_RESET_REQ))) {
916 /*
917 * Keep the restart process from trying to send host
918 * commands by clearing the ready bit.
919 */
920 clear_bit(STATUS_READY, &priv->status);
921 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
922 wake_up_interruptible(&priv->wait_command_queue);
923 IWL_ERR(priv, "RF is used by WiMAX\n");
924 return;
925 }
926
927 IWL_ERR(priv, "Loaded firmware version: %s\n",
928 priv->hw->wiphy->fw_version);
929
930 iwl_dump_nic_error_log(priv);
931 iwl_dump_csr(priv);
932 iwl_dump_fh(priv, NULL, false);
933 iwl_dump_nic_event_log(priv, false, NULL, false);
934 #ifdef CONFIG_IWLWIFI_DEBUG
935 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
936 iwl_print_rx_config_cmd(priv,
937 &priv->contexts[IWL_RXON_CTX_BSS]);
938 #endif
939
940 iwlagn_fw_error(priv, false);
941 }
942
943 static int iwl_apm_stop_master(struct iwl_priv *priv)
944 {
945 int ret = 0;
946
947 /* stop device's busmaster DMA activity */
948 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
949
950 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
951 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
952 if (ret)
953 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
954
955 IWL_DEBUG_INFO(priv, "stop master\n");
956
957 return ret;
958 }
959
960 void iwl_apm_stop(struct iwl_priv *priv)
961 {
962 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
963
964 clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
965
966 /* Stop device's DMA activity */
967 iwl_apm_stop_master(priv);
968
969 /* Reset the entire device */
970 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
971
972 udelay(10);
973
974 /*
975 * Clear "initialization complete" bit to move adapter from
976 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
977 */
978 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
979 }
980
981
982 /*
983 * Start up NIC's basic functionality after it has been reset
984 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
985 * NOTE: This does not load uCode nor start the embedded processor
986 */
987 int iwl_apm_init(struct iwl_priv *priv)
988 {
989 int ret = 0;
990 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
991
992 /*
993 * Use "set_bit" below rather than "write", to preserve any hardware
994 * bits already set by default after reset.
995 */
996
997 /* Disable L0S exit timer (platform NMI Work/Around) */
998 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
999 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1000
1001 /*
1002 * Disable L0s without affecting L1;
1003 * don't wait for ICH L0s (ICH bug W/A)
1004 */
1005 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1006 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1007
1008 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1009 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1010
1011 /*
1012 * Enable HAP INTA (interrupt from management bus) to
1013 * wake device's PCI Express link L1a -> L0s
1014 */
1015 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1016 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1017
1018 bus_apm_config(priv->bus);
1019
1020 /* Configure analog phase-lock-loop before activating to D0A */
1021 if (priv->cfg->base_params->pll_cfg_val)
1022 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1023 priv->cfg->base_params->pll_cfg_val);
1024
1025 /*
1026 * Set "initialization complete" bit to move adapter from
1027 * D0U* --> D0A* (powered-up active) state.
1028 */
1029 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1030
1031 /*
1032 * Wait for clock stabilization; once stabilized, access to
1033 * device-internal resources is supported, e.g. iwl_write_prph()
1034 * and accesses to uCode SRAM.
1035 */
1036 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1037 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1038 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1039 if (ret < 0) {
1040 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1041 goto out;
1042 }
1043
1044 /*
1045 * Enable DMA clock and wait for it to stabilize.
1046 *
1047 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1048 * do not disable clocks. This preserves any hardware bits already
1049 * set by default in "CLK_CTRL_REG" after reset.
1050 */
1051 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1052 udelay(20);
1053
1054 /* Disable L1-Active */
1055 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1056 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1057
1058 set_bit(STATUS_DEVICE_ENABLED, &priv->status);
1059
1060 out:
1061 return ret;
1062 }
1063
1064
1065 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1066 {
1067 int ret;
1068 s8 prev_tx_power;
1069 bool defer;
1070 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1071
1072 lockdep_assert_held(&priv->mutex);
1073
1074 if (priv->tx_power_user_lmt == tx_power && !force)
1075 return 0;
1076
1077 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1078 IWL_WARN(priv,
1079 "Requested user TXPOWER %d below lower limit %d.\n",
1080 tx_power,
1081 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1082 return -EINVAL;
1083 }
1084
1085 if (tx_power > priv->tx_power_device_lmt) {
1086 IWL_WARN(priv,
1087 "Requested user TXPOWER %d above upper limit %d.\n",
1088 tx_power, priv->tx_power_device_lmt);
1089 return -EINVAL;
1090 }
1091
1092 if (!iwl_is_ready_rf(priv))
1093 return -EIO;
1094
1095 /* scan complete and commit_rxon use tx_power_next value,
1096 * it always need to be updated for newest request */
1097 priv->tx_power_next = tx_power;
1098
1099 /* do not set tx power when scanning or channel changing */
1100 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1101 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1102 if (defer && !force) {
1103 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1104 return 0;
1105 }
1106
1107 prev_tx_power = priv->tx_power_user_lmt;
1108 priv->tx_power_user_lmt = tx_power;
1109
1110 ret = iwlagn_send_tx_power(priv);
1111
1112 /* if fail to set tx_power, restore the orig. tx power */
1113 if (ret) {
1114 priv->tx_power_user_lmt = prev_tx_power;
1115 priv->tx_power_next = prev_tx_power;
1116 }
1117 return ret;
1118 }
1119
1120 void iwl_send_bt_config(struct iwl_priv *priv)
1121 {
1122 struct iwl_bt_cmd bt_cmd = {
1123 .lead_time = BT_LEAD_TIME_DEF,
1124 .max_kill = BT_MAX_KILL_DEF,
1125 .kill_ack_mask = 0,
1126 .kill_cts_mask = 0,
1127 };
1128
1129 if (!iwlagn_mod_params.bt_coex_active)
1130 bt_cmd.flags = BT_COEX_DISABLE;
1131 else
1132 bt_cmd.flags = BT_COEX_ENABLE;
1133
1134 priv->bt_enable_flag = bt_cmd.flags;
1135 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1136 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1137
1138 if (trans_send_cmd_pdu(&priv->trans, REPLY_BT_CONFIG,
1139 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
1140 IWL_ERR(priv, "failed to send BT Coex Config\n");
1141 }
1142
1143 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1144 {
1145 struct iwl_statistics_cmd statistics_cmd = {
1146 .configuration_flags =
1147 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1148 };
1149
1150 if (flags & CMD_ASYNC)
1151 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1152 CMD_ASYNC,
1153 sizeof(struct iwl_statistics_cmd),
1154 &statistics_cmd);
1155 else
1156 return trans_send_cmd_pdu(&priv->trans, REPLY_STATISTICS_CMD,
1157 CMD_SYNC,
1158 sizeof(struct iwl_statistics_cmd),
1159 &statistics_cmd);
1160 }
1161
1162 void iwl_clear_isr_stats(struct iwl_priv *priv)
1163 {
1164 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1165 }
1166
1167 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1168 const struct ieee80211_tx_queue_params *params)
1169 {
1170 struct iwl_priv *priv = hw->priv;
1171 struct iwl_rxon_context *ctx;
1172 unsigned long flags;
1173 int q;
1174
1175 IWL_DEBUG_MAC80211(priv, "enter\n");
1176
1177 if (!iwl_is_ready_rf(priv)) {
1178 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1179 return -EIO;
1180 }
1181
1182 if (queue >= AC_NUM) {
1183 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1184 return 0;
1185 }
1186
1187 q = AC_NUM - 1 - queue;
1188
1189 spin_lock_irqsave(&priv->lock, flags);
1190
1191 /*
1192 * MULTI-FIXME
1193 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1194 */
1195 for_each_context(priv, ctx) {
1196 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1197 cpu_to_le16(params->cw_min);
1198 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1199 cpu_to_le16(params->cw_max);
1200 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1201 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1202 cpu_to_le16((params->txop * 32));
1203
1204 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1205 }
1206
1207 spin_unlock_irqrestore(&priv->lock, flags);
1208
1209 IWL_DEBUG_MAC80211(priv, "leave\n");
1210 return 0;
1211 }
1212
1213 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1214 {
1215 struct iwl_priv *priv = hw->priv;
1216
1217 return priv->ibss_manager == IWL_IBSS_MANAGER;
1218 }
1219
1220 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1221 {
1222 iwl_connection_init_rx_config(priv, ctx);
1223
1224 iwlagn_set_rxon_chain(priv, ctx);
1225
1226 return iwlagn_commit_rxon(priv, ctx);
1227 }
1228
1229 static int iwl_setup_interface(struct iwl_priv *priv,
1230 struct iwl_rxon_context *ctx)
1231 {
1232 struct ieee80211_vif *vif = ctx->vif;
1233 int err;
1234
1235 lockdep_assert_held(&priv->mutex);
1236
1237 /*
1238 * This variable will be correct only when there's just
1239 * a single context, but all code using it is for hardware
1240 * that supports only one context.
1241 */
1242 priv->iw_mode = vif->type;
1243
1244 ctx->is_active = true;
1245
1246 err = iwl_set_mode(priv, ctx);
1247 if (err) {
1248 if (!ctx->always_active)
1249 ctx->is_active = false;
1250 return err;
1251 }
1252
1253 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1254 vif->type == NL80211_IFTYPE_ADHOC) {
1255 /*
1256 * pretend to have high BT traffic as long as we
1257 * are operating in IBSS mode, as this will cause
1258 * the rate scaling etc. to behave as intended.
1259 */
1260 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1261 }
1262
1263 return 0;
1264 }
1265
1266 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1267 {
1268 struct iwl_priv *priv = hw->priv;
1269 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1270 struct iwl_rxon_context *tmp, *ctx = NULL;
1271 int err;
1272 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1273
1274 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1275 viftype, vif->addr);
1276
1277 cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1278
1279 mutex_lock(&priv->mutex);
1280
1281 iwlagn_disable_roc(priv);
1282
1283 if (!iwl_is_ready_rf(priv)) {
1284 IWL_WARN(priv, "Try to add interface when device not ready\n");
1285 err = -EINVAL;
1286 goto out;
1287 }
1288
1289 for_each_context(priv, tmp) {
1290 u32 possible_modes =
1291 tmp->interface_modes | tmp->exclusive_interface_modes;
1292
1293 if (tmp->vif) {
1294 /* check if this busy context is exclusive */
1295 if (tmp->exclusive_interface_modes &
1296 BIT(tmp->vif->type)) {
1297 err = -EINVAL;
1298 goto out;
1299 }
1300 continue;
1301 }
1302
1303 if (!(possible_modes & BIT(viftype)))
1304 continue;
1305
1306 /* have maybe usable context w/o interface */
1307 ctx = tmp;
1308 break;
1309 }
1310
1311 if (!ctx) {
1312 err = -EOPNOTSUPP;
1313 goto out;
1314 }
1315
1316 vif_priv->ctx = ctx;
1317 ctx->vif = vif;
1318
1319 err = iwl_setup_interface(priv, ctx);
1320 if (!err)
1321 goto out;
1322
1323 ctx->vif = NULL;
1324 priv->iw_mode = NL80211_IFTYPE_STATION;
1325 out:
1326 mutex_unlock(&priv->mutex);
1327
1328 IWL_DEBUG_MAC80211(priv, "leave\n");
1329 return err;
1330 }
1331
1332 static void iwl_teardown_interface(struct iwl_priv *priv,
1333 struct ieee80211_vif *vif,
1334 bool mode_change)
1335 {
1336 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1337
1338 lockdep_assert_held(&priv->mutex);
1339
1340 if (priv->scan_vif == vif) {
1341 iwl_scan_cancel_timeout(priv, 200);
1342 iwl_force_scan_end(priv);
1343 }
1344
1345 if (!mode_change) {
1346 iwl_set_mode(priv, ctx);
1347 if (!ctx->always_active)
1348 ctx->is_active = false;
1349 }
1350
1351 /*
1352 * When removing the IBSS interface, overwrite the
1353 * BT traffic load with the stored one from the last
1354 * notification, if any. If this is a device that
1355 * doesn't implement this, this has no effect since
1356 * both values are the same and zero.
1357 */
1358 if (vif->type == NL80211_IFTYPE_ADHOC)
1359 priv->bt_traffic_load = priv->last_bt_traffic_load;
1360 }
1361
1362 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1363 struct ieee80211_vif *vif)
1364 {
1365 struct iwl_priv *priv = hw->priv;
1366 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1367
1368 IWL_DEBUG_MAC80211(priv, "enter\n");
1369
1370 mutex_lock(&priv->mutex);
1371
1372 WARN_ON(ctx->vif != vif);
1373 ctx->vif = NULL;
1374
1375 iwl_teardown_interface(priv, vif, false);
1376
1377 mutex_unlock(&priv->mutex);
1378
1379 IWL_DEBUG_MAC80211(priv, "leave\n");
1380
1381 }
1382
1383 #ifdef CONFIG_IWLWIFI_DEBUGFS
1384
1385 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1386
1387 void iwl_reset_traffic_log(struct iwl_priv *priv)
1388 {
1389 priv->tx_traffic_idx = 0;
1390 priv->rx_traffic_idx = 0;
1391 if (priv->tx_traffic)
1392 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1393 if (priv->rx_traffic)
1394 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1395 }
1396
1397 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1398 {
1399 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1400
1401 if (iwl_debug_level & IWL_DL_TX) {
1402 if (!priv->tx_traffic) {
1403 priv->tx_traffic =
1404 kzalloc(traffic_size, GFP_KERNEL);
1405 if (!priv->tx_traffic)
1406 return -ENOMEM;
1407 }
1408 }
1409 if (iwl_debug_level & IWL_DL_RX) {
1410 if (!priv->rx_traffic) {
1411 priv->rx_traffic =
1412 kzalloc(traffic_size, GFP_KERNEL);
1413 if (!priv->rx_traffic)
1414 return -ENOMEM;
1415 }
1416 }
1417 iwl_reset_traffic_log(priv);
1418 return 0;
1419 }
1420
1421 void iwl_free_traffic_mem(struct iwl_priv *priv)
1422 {
1423 kfree(priv->tx_traffic);
1424 priv->tx_traffic = NULL;
1425
1426 kfree(priv->rx_traffic);
1427 priv->rx_traffic = NULL;
1428 }
1429
1430 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1431 u16 length, struct ieee80211_hdr *header)
1432 {
1433 __le16 fc;
1434 u16 len;
1435
1436 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1437 return;
1438
1439 if (!priv->tx_traffic)
1440 return;
1441
1442 fc = header->frame_control;
1443 if (ieee80211_is_data(fc)) {
1444 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1445 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1446 memcpy((priv->tx_traffic +
1447 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1448 header, len);
1449 priv->tx_traffic_idx =
1450 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1451 }
1452 }
1453
1454 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1455 u16 length, struct ieee80211_hdr *header)
1456 {
1457 __le16 fc;
1458 u16 len;
1459
1460 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1461 return;
1462
1463 if (!priv->rx_traffic)
1464 return;
1465
1466 fc = header->frame_control;
1467 if (ieee80211_is_data(fc)) {
1468 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1469 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1470 memcpy((priv->rx_traffic +
1471 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1472 header, len);
1473 priv->rx_traffic_idx =
1474 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1475 }
1476 }
1477
1478 const char *get_mgmt_string(int cmd)
1479 {
1480 switch (cmd) {
1481 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1482 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1483 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1484 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1485 IWL_CMD(MANAGEMENT_PROBE_REQ);
1486 IWL_CMD(MANAGEMENT_PROBE_RESP);
1487 IWL_CMD(MANAGEMENT_BEACON);
1488 IWL_CMD(MANAGEMENT_ATIM);
1489 IWL_CMD(MANAGEMENT_DISASSOC);
1490 IWL_CMD(MANAGEMENT_AUTH);
1491 IWL_CMD(MANAGEMENT_DEAUTH);
1492 IWL_CMD(MANAGEMENT_ACTION);
1493 default:
1494 return "UNKNOWN";
1495
1496 }
1497 }
1498
1499 const char *get_ctrl_string(int cmd)
1500 {
1501 switch (cmd) {
1502 IWL_CMD(CONTROL_BACK_REQ);
1503 IWL_CMD(CONTROL_BACK);
1504 IWL_CMD(CONTROL_PSPOLL);
1505 IWL_CMD(CONTROL_RTS);
1506 IWL_CMD(CONTROL_CTS);
1507 IWL_CMD(CONTROL_ACK);
1508 IWL_CMD(CONTROL_CFEND);
1509 IWL_CMD(CONTROL_CFENDACK);
1510 default:
1511 return "UNKNOWN";
1512
1513 }
1514 }
1515
1516 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1517 {
1518 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1519 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1520 }
1521
1522 /*
1523 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1524 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1525 * Use debugFs to display the rx/rx_statistics
1526 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1527 * information will be recorded, but DATA pkt still will be recorded
1528 * for the reason of iwl_led.c need to control the led blinking based on
1529 * number of tx and rx data.
1530 *
1531 */
1532 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1533 {
1534 struct traffic_stats *stats;
1535
1536 if (is_tx)
1537 stats = &priv->tx_stats;
1538 else
1539 stats = &priv->rx_stats;
1540
1541 if (ieee80211_is_mgmt(fc)) {
1542 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1543 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1544 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1545 break;
1546 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1547 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1548 break;
1549 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1550 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1551 break;
1552 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1553 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1554 break;
1555 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1556 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1557 break;
1558 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1559 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1560 break;
1561 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1562 stats->mgmt[MANAGEMENT_BEACON]++;
1563 break;
1564 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1565 stats->mgmt[MANAGEMENT_ATIM]++;
1566 break;
1567 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1568 stats->mgmt[MANAGEMENT_DISASSOC]++;
1569 break;
1570 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1571 stats->mgmt[MANAGEMENT_AUTH]++;
1572 break;
1573 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1574 stats->mgmt[MANAGEMENT_DEAUTH]++;
1575 break;
1576 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1577 stats->mgmt[MANAGEMENT_ACTION]++;
1578 break;
1579 }
1580 } else if (ieee80211_is_ctl(fc)) {
1581 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1582 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1583 stats->ctrl[CONTROL_BACK_REQ]++;
1584 break;
1585 case cpu_to_le16(IEEE80211_STYPE_BACK):
1586 stats->ctrl[CONTROL_BACK]++;
1587 break;
1588 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1589 stats->ctrl[CONTROL_PSPOLL]++;
1590 break;
1591 case cpu_to_le16(IEEE80211_STYPE_RTS):
1592 stats->ctrl[CONTROL_RTS]++;
1593 break;
1594 case cpu_to_le16(IEEE80211_STYPE_CTS):
1595 stats->ctrl[CONTROL_CTS]++;
1596 break;
1597 case cpu_to_le16(IEEE80211_STYPE_ACK):
1598 stats->ctrl[CONTROL_ACK]++;
1599 break;
1600 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1601 stats->ctrl[CONTROL_CFEND]++;
1602 break;
1603 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1604 stats->ctrl[CONTROL_CFENDACK]++;
1605 break;
1606 }
1607 } else {
1608 /* data */
1609 stats->data_cnt++;
1610 stats->data_bytes += len;
1611 }
1612 }
1613 #endif
1614
1615 static void iwl_force_rf_reset(struct iwl_priv *priv)
1616 {
1617 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1618 return;
1619
1620 if (!iwl_is_any_associated(priv)) {
1621 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1622 return;
1623 }
1624 /*
1625 * There is no easy and better way to force reset the radio,
1626 * the only known method is switching channel which will force to
1627 * reset and tune the radio.
1628 * Use internal short scan (single channel) operation to should
1629 * achieve this objective.
1630 * Driver should reset the radio when number of consecutive missed
1631 * beacon, or any other uCode error condition detected.
1632 */
1633 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1634 iwl_internal_short_hw_scan(priv);
1635 }
1636
1637
1638 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1639 {
1640 struct iwl_force_reset *force_reset;
1641
1642 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1643 return -EINVAL;
1644
1645 if (mode >= IWL_MAX_FORCE_RESET) {
1646 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1647 return -EINVAL;
1648 }
1649 force_reset = &priv->force_reset[mode];
1650 force_reset->reset_request_count++;
1651 if (!external) {
1652 if (force_reset->last_force_reset_jiffies &&
1653 time_after(force_reset->last_force_reset_jiffies +
1654 force_reset->reset_duration, jiffies)) {
1655 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1656 force_reset->reset_reject_count++;
1657 return -EAGAIN;
1658 }
1659 }
1660 force_reset->reset_success_count++;
1661 force_reset->last_force_reset_jiffies = jiffies;
1662 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1663 switch (mode) {
1664 case IWL_RF_RESET:
1665 iwl_force_rf_reset(priv);
1666 break;
1667 case IWL_FW_RESET:
1668 /*
1669 * if the request is from external(ex: debugfs),
1670 * then always perform the request in regardless the module
1671 * parameter setting
1672 * if the request is from internal (uCode error or driver
1673 * detect failure), then fw_restart module parameter
1674 * need to be check before performing firmware reload
1675 */
1676 if (!external && !iwlagn_mod_params.restart_fw) {
1677 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1678 "module parameter setting\n");
1679 break;
1680 }
1681 IWL_ERR(priv, "On demand firmware reload\n");
1682 iwlagn_fw_error(priv, true);
1683 break;
1684 }
1685 return 0;
1686 }
1687
1688 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1689 enum nl80211_iftype newtype, bool newp2p)
1690 {
1691 struct iwl_priv *priv = hw->priv;
1692 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1693 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1694 struct iwl_rxon_context *tmp;
1695 enum nl80211_iftype newviftype = newtype;
1696 u32 interface_modes;
1697 int err;
1698
1699 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1700
1701 mutex_lock(&priv->mutex);
1702
1703 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1704 /*
1705 * Huh? But wait ... this can maybe happen when
1706 * we're in the middle of a firmware restart!
1707 */
1708 err = -EBUSY;
1709 goto out;
1710 }
1711
1712 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1713
1714 if (!(interface_modes & BIT(newtype))) {
1715 err = -EBUSY;
1716 goto out;
1717 }
1718
1719 /*
1720 * Refuse a change that should be done by moving from the PAN
1721 * context to the BSS context instead, if the BSS context is
1722 * available and can support the new interface type.
1723 */
1724 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1725 (bss_ctx->interface_modes & BIT(newtype) ||
1726 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1727 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1728 err = -EBUSY;
1729 goto out;
1730 }
1731
1732 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1733 for_each_context(priv, tmp) {
1734 if (ctx == tmp)
1735 continue;
1736
1737 if (!tmp->vif)
1738 continue;
1739
1740 /*
1741 * The current mode switch would be exclusive, but
1742 * another context is active ... refuse the switch.
1743 */
1744 err = -EBUSY;
1745 goto out;
1746 }
1747 }
1748
1749 /* success */
1750 iwl_teardown_interface(priv, vif, true);
1751 vif->type = newviftype;
1752 vif->p2p = newp2p;
1753 err = iwl_setup_interface(priv, ctx);
1754 WARN_ON(err);
1755 /*
1756 * We've switched internally, but submitting to the
1757 * device may have failed for some reason. Mask this
1758 * error, because otherwise mac80211 will not switch
1759 * (and set the interface type back) and we'll be
1760 * out of sync with it.
1761 */
1762 err = 0;
1763
1764 out:
1765 mutex_unlock(&priv->mutex);
1766 return err;
1767 }
1768
1769 /*
1770 * On every watchdog tick we check (latest) time stamp. If it does not
1771 * change during timeout period and queue is not empty we reset firmware.
1772 */
1773 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1774 {
1775 struct iwl_tx_queue *txq = &priv->txq[cnt];
1776 struct iwl_queue *q = &txq->q;
1777 unsigned long timeout;
1778 int ret;
1779
1780 if (q->read_ptr == q->write_ptr) {
1781 txq->time_stamp = jiffies;
1782 return 0;
1783 }
1784
1785 timeout = txq->time_stamp +
1786 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1787
1788 if (time_after(jiffies, timeout)) {
1789 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1790 q->id, priv->cfg->base_params->wd_timeout);
1791 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1792 return (ret == -EAGAIN) ? 0 : 1;
1793 }
1794
1795 return 0;
1796 }
1797
1798 /*
1799 * Making watchdog tick be a quarter of timeout assure we will
1800 * discover the queue hung between timeout and 1.25*timeout
1801 */
1802 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1803
1804 /*
1805 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1806 * we reset the firmware. If everything is fine just rearm the timer.
1807 */
1808 void iwl_bg_watchdog(unsigned long data)
1809 {
1810 struct iwl_priv *priv = (struct iwl_priv *)data;
1811 int cnt;
1812 unsigned long timeout;
1813
1814 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1815 return;
1816
1817 timeout = priv->cfg->base_params->wd_timeout;
1818 if (timeout == 0)
1819 return;
1820
1821 /* monitor and check for stuck cmd queue */
1822 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1823 return;
1824
1825 /* monitor and check for other stuck queues */
1826 if (iwl_is_any_associated(priv)) {
1827 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1828 /* skip as we already checked the command queue */
1829 if (cnt == priv->cmd_queue)
1830 continue;
1831 if (iwl_check_stuck_queue(priv, cnt))
1832 return;
1833 }
1834 }
1835
1836 mod_timer(&priv->watchdog, jiffies +
1837 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1838 }
1839
1840 void iwl_setup_watchdog(struct iwl_priv *priv)
1841 {
1842 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1843
1844 if (timeout && !iwlagn_mod_params.wd_disable)
1845 mod_timer(&priv->watchdog,
1846 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1847 else
1848 del_timer(&priv->watchdog);
1849 }
1850
1851 /*
1852 * extended beacon time format
1853 * time in usec will be changed into a 32-bit value in extended:internal format
1854 * the extended part is the beacon counts
1855 * the internal part is the time in usec within one beacon interval
1856 */
1857 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1858 {
1859 u32 quot;
1860 u32 rem;
1861 u32 interval = beacon_interval * TIME_UNIT;
1862
1863 if (!interval || !usec)
1864 return 0;
1865
1866 quot = (usec / interval) &
1867 (iwl_beacon_time_mask_high(priv,
1868 priv->hw_params.beacon_time_tsf_bits) >>
1869 priv->hw_params.beacon_time_tsf_bits);
1870 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1871 priv->hw_params.beacon_time_tsf_bits);
1872
1873 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1874 }
1875
1876 /* base is usually what we get from ucode with each received frame,
1877 * the same as HW timer counter counting down
1878 */
1879 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1880 u32 addon, u32 beacon_interval)
1881 {
1882 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1883 priv->hw_params.beacon_time_tsf_bits);
1884 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1885 priv->hw_params.beacon_time_tsf_bits);
1886 u32 interval = beacon_interval * TIME_UNIT;
1887 u32 res = (base & iwl_beacon_time_mask_high(priv,
1888 priv->hw_params.beacon_time_tsf_bits)) +
1889 (addon & iwl_beacon_time_mask_high(priv,
1890 priv->hw_params.beacon_time_tsf_bits));
1891
1892 if (base_low > addon_low)
1893 res += base_low - addon_low;
1894 else if (base_low < addon_low) {
1895 res += interval + base_low - addon_low;
1896 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1897 } else
1898 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1899
1900 return cpu_to_le32(res);
1901 }
1902
1903 #ifdef CONFIG_PM
1904
1905 int iwl_suspend(struct iwl_priv *priv)
1906 {
1907 /*
1908 * This function is called when system goes into suspend state
1909 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1910 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1911 * it will not call apm_ops.stop() to stop the DMA operation.
1912 * Calling apm_ops.stop here to make sure we stop the DMA.
1913 *
1914 * But of course ... if we have configured WoWLAN then we did other
1915 * things already :-)
1916 */
1917 if (!priv->wowlan)
1918 iwl_apm_stop(priv);
1919
1920 return 0;
1921 }
1922
1923 int iwl_resume(struct iwl_priv *priv)
1924 {
1925 bool hw_rfkill = false;
1926
1927 iwl_enable_interrupts(priv);
1928
1929 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1930 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1931 hw_rfkill = true;
1932
1933 if (hw_rfkill)
1934 set_bit(STATUS_RF_KILL_HW, &priv->status);
1935 else
1936 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1937
1938 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1939
1940 return 0;
1941 }
1942
1943 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree