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iwlagn: add an API to free the TX context
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob9bf46864f0d12cfee5a8a0146145835403ce530b
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
46 u32 iwl_debug_level;
47
48 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
49
50 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
51 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
52 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
53 struct ieee80211_sta_ht_cap *ht_info,
54 enum ieee80211_band band)
55 {
56 u16 max_bit_rate = 0;
57 u8 rx_chains_num = priv->hw_params.rx_chains_num;
58 u8 tx_chains_num = priv->hw_params.tx_chains_num;
59
60 ht_info->cap = 0;
61 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
62
63 ht_info->ht_supported = true;
64
65 if (priv->cfg->ht_params &&
66 priv->cfg->ht_params->ht_greenfield_support)
67 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
68 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
69 max_bit_rate = MAX_BIT_RATE_20_MHZ;
70 if (priv->hw_params.ht40_channel & BIT(band)) {
71 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
72 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
73 ht_info->mcs.rx_mask[4] = 0x01;
74 max_bit_rate = MAX_BIT_RATE_40_MHZ;
75 }
76
77 if (iwlagn_mod_params.amsdu_size_8K)
78 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
79
80 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
81 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
82 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
83 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
84 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
85 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
86
87 ht_info->mcs.rx_mask[0] = 0xFF;
88 if (rx_chains_num >= 2)
89 ht_info->mcs.rx_mask[1] = 0xFF;
90 if (rx_chains_num >= 3)
91 ht_info->mcs.rx_mask[2] = 0xFF;
92
93 /* Highest supported Rx data rate */
94 max_bit_rate *= rx_chains_num;
95 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
96 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
97
98 /* Tx MCS capabilities */
99 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
100 if (tx_chains_num != rx_chains_num) {
101 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
102 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
103 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
104 }
105 }
106
107 /**
108 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
109 */
110 int iwlcore_init_geos(struct iwl_priv *priv)
111 {
112 struct iwl_channel_info *ch;
113 struct ieee80211_supported_band *sband;
114 struct ieee80211_channel *channels;
115 struct ieee80211_channel *geo_ch;
116 struct ieee80211_rate *rates;
117 int i = 0;
118 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
119
120 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
121 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
122 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
123 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
124 return 0;
125 }
126
127 channels = kzalloc(sizeof(struct ieee80211_channel) *
128 priv->channel_count, GFP_KERNEL);
129 if (!channels)
130 return -ENOMEM;
131
132 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
133 GFP_KERNEL);
134 if (!rates) {
135 kfree(channels);
136 return -ENOMEM;
137 }
138
139 /* 5.2GHz channels start after the 2.4GHz channels */
140 sband = &priv->bands[IEEE80211_BAND_5GHZ];
141 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
142 /* just OFDM */
143 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
144 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
145
146 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
147 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
148 IEEE80211_BAND_5GHZ);
149
150 sband = &priv->bands[IEEE80211_BAND_2GHZ];
151 sband->channels = channels;
152 /* OFDM & CCK */
153 sband->bitrates = rates;
154 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
155
156 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
157 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
158 IEEE80211_BAND_2GHZ);
159
160 priv->ieee_channels = channels;
161 priv->ieee_rates = rates;
162
163 for (i = 0; i < priv->channel_count; i++) {
164 ch = &priv->channel_info[i];
165
166 /* FIXME: might be removed if scan is OK */
167 if (!is_channel_valid(ch))
168 continue;
169
170 sband = &priv->bands[ch->band];
171
172 geo_ch = &sband->channels[sband->n_channels++];
173
174 geo_ch->center_freq =
175 ieee80211_channel_to_frequency(ch->channel, ch->band);
176 geo_ch->max_power = ch->max_power_avg;
177 geo_ch->max_antenna_gain = 0xff;
178 geo_ch->hw_value = ch->channel;
179
180 if (is_channel_valid(ch)) {
181 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
182 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
183
184 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
185 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
186
187 if (ch->flags & EEPROM_CHANNEL_RADAR)
188 geo_ch->flags |= IEEE80211_CHAN_RADAR;
189
190 geo_ch->flags |= ch->ht40_extension_channel;
191
192 if (ch->max_power_avg > max_tx_power)
193 max_tx_power = ch->max_power_avg;
194 } else {
195 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
196 }
197
198 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
199 ch->channel, geo_ch->center_freq,
200 is_channel_a_band(ch) ? "5.2" : "2.4",
201 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
202 "restricted" : "valid",
203 geo_ch->flags);
204 }
205
206 priv->tx_power_device_lmt = max_tx_power;
207 priv->tx_power_user_lmt = max_tx_power;
208 priv->tx_power_next = max_tx_power;
209
210 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
211 priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
212 char buf[32];
213 priv->bus.ops->get_hw_id(&priv->bus, buf, sizeof(buf));
214 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
215 "Please send your %s to maintainer.\n", buf);
216 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
217 }
218
219 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
220 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
221 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
222
223 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
224
225 return 0;
226 }
227
228 /*
229 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
230 */
231 void iwlcore_free_geos(struct iwl_priv *priv)
232 {
233 kfree(priv->ieee_channels);
234 kfree(priv->ieee_rates);
235 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
236 }
237
238 static bool iwl_is_channel_extension(struct iwl_priv *priv,
239 enum ieee80211_band band,
240 u16 channel, u8 extension_chan_offset)
241 {
242 const struct iwl_channel_info *ch_info;
243
244 ch_info = iwl_get_channel_info(priv, band, channel);
245 if (!is_channel_valid(ch_info))
246 return false;
247
248 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
249 return !(ch_info->ht40_extension_channel &
250 IEEE80211_CHAN_NO_HT40PLUS);
251 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
252 return !(ch_info->ht40_extension_channel &
253 IEEE80211_CHAN_NO_HT40MINUS);
254
255 return false;
256 }
257
258 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
259 struct iwl_rxon_context *ctx,
260 struct ieee80211_sta_ht_cap *ht_cap)
261 {
262 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
263 return false;
264
265 /*
266 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
267 * the bit will not set if it is pure 40MHz case
268 */
269 if (ht_cap && !ht_cap->ht_supported)
270 return false;
271
272 #ifdef CONFIG_IWLWIFI_DEBUGFS
273 if (priv->disable_ht40)
274 return false;
275 #endif
276
277 return iwl_is_channel_extension(priv, priv->band,
278 le16_to_cpu(ctx->staging.channel),
279 ctx->ht.extension_chan_offset);
280 }
281
282 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
283 {
284 u16 new_val;
285 u16 beacon_factor;
286
287 /*
288 * If mac80211 hasn't given us a beacon interval, program
289 * the default into the device (not checking this here
290 * would cause the adjustment below to return the maximum
291 * value, which may break PAN.)
292 */
293 if (!beacon_val)
294 return DEFAULT_BEACON_INTERVAL;
295
296 /*
297 * If the beacon interval we obtained from the peer
298 * is too large, we'll have to wake up more often
299 * (and in IBSS case, we'll beacon too much)
300 *
301 * For example, if max_beacon_val is 4096, and the
302 * requested beacon interval is 7000, we'll have to
303 * use 3500 to be able to wake up on the beacons.
304 *
305 * This could badly influence beacon detection stats.
306 */
307
308 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
309 new_val = beacon_val / beacon_factor;
310
311 if (!new_val)
312 new_val = max_beacon_val;
313
314 return new_val;
315 }
316
317 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
318 {
319 u64 tsf;
320 s32 interval_tm, rem;
321 struct ieee80211_conf *conf = NULL;
322 u16 beacon_int;
323 struct ieee80211_vif *vif = ctx->vif;
324
325 conf = ieee80211_get_hw_conf(priv->hw);
326
327 lockdep_assert_held(&priv->mutex);
328
329 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
330
331 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
332 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
333
334 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
335
336 /*
337 * TODO: For IBSS we need to get atim_window from mac80211,
338 * for now just always use 0
339 */
340 ctx->timing.atim_window = 0;
341
342 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
343 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
344 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
345 priv->contexts[IWL_RXON_CTX_BSS].vif &&
346 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
347 ctx->timing.beacon_interval =
348 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
349 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
350 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
351 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
352 priv->contexts[IWL_RXON_CTX_PAN].vif &&
353 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
354 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
355 !ctx->vif->bss_conf.beacon_int)) {
356 ctx->timing.beacon_interval =
357 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
358 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
359 } else {
360 beacon_int = iwl_adjust_beacon_interval(beacon_int,
361 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
362 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
363 }
364
365 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
366 interval_tm = beacon_int * TIME_UNIT;
367 rem = do_div(tsf, interval_tm);
368 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
369
370 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
371
372 IWL_DEBUG_ASSOC(priv,
373 "beacon interval %d beacon timer %d beacon tim %d\n",
374 le16_to_cpu(ctx->timing.beacon_interval),
375 le32_to_cpu(ctx->timing.beacon_init_val),
376 le16_to_cpu(ctx->timing.atim_window));
377
378 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
379 sizeof(ctx->timing), &ctx->timing);
380 }
381
382 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
383 int hw_decrypt)
384 {
385 struct iwl_rxon_cmd *rxon = &ctx->staging;
386
387 if (hw_decrypt)
388 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
389 else
390 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
391
392 }
393
394 /* validate RXON structure is valid */
395 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
396 {
397 struct iwl_rxon_cmd *rxon = &ctx->staging;
398 u32 errors = 0;
399
400 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
401 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
402 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
403 errors |= BIT(0);
404 }
405 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
406 IWL_WARN(priv, "check 2.4G: wrong radar\n");
407 errors |= BIT(1);
408 }
409 } else {
410 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
411 IWL_WARN(priv, "check 5.2G: not short slot!\n");
412 errors |= BIT(2);
413 }
414 if (rxon->flags & RXON_FLG_CCK_MSK) {
415 IWL_WARN(priv, "check 5.2G: CCK!\n");
416 errors |= BIT(3);
417 }
418 }
419 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
420 IWL_WARN(priv, "mac/bssid mcast!\n");
421 errors |= BIT(4);
422 }
423
424 /* make sure basic rates 6Mbps and 1Mbps are supported */
425 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
426 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
427 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
428 errors |= BIT(5);
429 }
430
431 if (le16_to_cpu(rxon->assoc_id) > 2007) {
432 IWL_WARN(priv, "aid > 2007\n");
433 errors |= BIT(6);
434 }
435
436 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
437 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
438 IWL_WARN(priv, "CCK and short slot\n");
439 errors |= BIT(7);
440 }
441
442 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
443 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
444 IWL_WARN(priv, "CCK and auto detect");
445 errors |= BIT(8);
446 }
447
448 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
449 RXON_FLG_TGG_PROTECT_MSK)) ==
450 RXON_FLG_TGG_PROTECT_MSK) {
451 IWL_WARN(priv, "TGg but no auto-detect\n");
452 errors |= BIT(9);
453 }
454
455 if (rxon->channel == 0) {
456 IWL_WARN(priv, "zero channel is invalid\n");
457 errors |= BIT(10);
458 }
459
460 WARN(errors, "Invalid RXON (%#x), channel %d",
461 errors, le16_to_cpu(rxon->channel));
462
463 return errors ? -EINVAL : 0;
464 }
465
466 /**
467 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
468 * @priv: staging_rxon is compared to active_rxon
469 *
470 * If the RXON structure is changing enough to require a new tune,
471 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
472 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
473 */
474 int iwl_full_rxon_required(struct iwl_priv *priv,
475 struct iwl_rxon_context *ctx)
476 {
477 const struct iwl_rxon_cmd *staging = &ctx->staging;
478 const struct iwl_rxon_cmd *active = &ctx->active;
479
480 #define CHK(cond) \
481 if ((cond)) { \
482 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
483 return 1; \
484 }
485
486 #define CHK_NEQ(c1, c2) \
487 if ((c1) != (c2)) { \
488 IWL_DEBUG_INFO(priv, "need full RXON - " \
489 #c1 " != " #c2 " - %d != %d\n", \
490 (c1), (c2)); \
491 return 1; \
492 }
493
494 /* These items are only settable from the full RXON command */
495 CHK(!iwl_is_associated_ctx(ctx));
496 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
497 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
498 CHK(compare_ether_addr(staging->wlap_bssid_addr,
499 active->wlap_bssid_addr));
500 CHK_NEQ(staging->dev_type, active->dev_type);
501 CHK_NEQ(staging->channel, active->channel);
502 CHK_NEQ(staging->air_propagation, active->air_propagation);
503 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
504 active->ofdm_ht_single_stream_basic_rates);
505 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
506 active->ofdm_ht_dual_stream_basic_rates);
507 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
508 active->ofdm_ht_triple_stream_basic_rates);
509 CHK_NEQ(staging->assoc_id, active->assoc_id);
510
511 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
512 * be updated with the RXON_ASSOC command -- however only some
513 * flag transitions are allowed using RXON_ASSOC */
514
515 /* Check if we are not switching bands */
516 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
517 active->flags & RXON_FLG_BAND_24G_MSK);
518
519 /* Check if we are switching association toggle */
520 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
521 active->filter_flags & RXON_FILTER_ASSOC_MSK);
522
523 #undef CHK
524 #undef CHK_NEQ
525
526 return 0;
527 }
528
529 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
530 struct iwl_ht_config *ht_conf,
531 struct iwl_rxon_context *ctx)
532 {
533 struct iwl_rxon_cmd *rxon = &ctx->staging;
534
535 if (!ctx->ht.enabled) {
536 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
537 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
538 RXON_FLG_HT40_PROT_MSK |
539 RXON_FLG_HT_PROT_MSK);
540 return;
541 }
542
543 /* FIXME: if the definition of ht.protection changed, the "translation"
544 * will be needed for rxon->flags
545 */
546 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
547
548 /* Set up channel bandwidth:
549 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
550 /* clear the HT channel mode before set the mode */
551 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
552 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
553 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
554 /* pure ht40 */
555 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
556 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
557 /* Note: control channel is opposite of extension channel */
558 switch (ctx->ht.extension_chan_offset) {
559 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
560 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
561 break;
562 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
563 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
564 break;
565 }
566 } else {
567 /* Note: control channel is opposite of extension channel */
568 switch (ctx->ht.extension_chan_offset) {
569 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
570 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
571 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
572 break;
573 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
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_NONE:
578 default:
579 /* channel location only valid if in Mixed mode */
580 IWL_ERR(priv, "invalid extension channel offset\n");
581 break;
582 }
583 }
584 } else {
585 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
586 }
587
588 iwlagn_set_rxon_chain(priv, ctx);
589
590 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
591 "extension channel offset 0x%x\n",
592 le32_to_cpu(rxon->flags), ctx->ht.protection,
593 ctx->ht.extension_chan_offset);
594 }
595
596 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
597 {
598 struct iwl_rxon_context *ctx;
599
600 for_each_context(priv, ctx)
601 _iwl_set_rxon_ht(priv, ht_conf, ctx);
602 }
603
604 /* Return valid, unused, channel for a passive scan to reset the RF */
605 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
606 enum ieee80211_band band)
607 {
608 const struct iwl_channel_info *ch_info;
609 int i;
610 u8 channel = 0;
611 u8 min, max;
612 struct iwl_rxon_context *ctx;
613
614 if (band == IEEE80211_BAND_5GHZ) {
615 min = 14;
616 max = priv->channel_count;
617 } else {
618 min = 0;
619 max = 14;
620 }
621
622 for (i = min; i < max; i++) {
623 bool busy = false;
624
625 for_each_context(priv, ctx) {
626 busy = priv->channel_info[i].channel ==
627 le16_to_cpu(ctx->staging.channel);
628 if (busy)
629 break;
630 }
631
632 if (busy)
633 continue;
634
635 channel = priv->channel_info[i].channel;
636 ch_info = iwl_get_channel_info(priv, band, channel);
637 if (is_channel_valid(ch_info))
638 break;
639 }
640
641 return channel;
642 }
643
644 /**
645 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
646 * @ch: requested channel as a pointer to struct ieee80211_channel
647
648 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
649 * in the staging RXON flag structure based on the ch->band
650 */
651 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
652 struct iwl_rxon_context *ctx)
653 {
654 enum ieee80211_band band = ch->band;
655 u16 channel = ch->hw_value;
656
657 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
658 (priv->band == band))
659 return 0;
660
661 ctx->staging.channel = cpu_to_le16(channel);
662 if (band == IEEE80211_BAND_5GHZ)
663 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
664 else
665 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
666
667 priv->band = band;
668
669 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
670
671 return 0;
672 }
673
674 void iwl_set_flags_for_band(struct iwl_priv *priv,
675 struct iwl_rxon_context *ctx,
676 enum ieee80211_band band,
677 struct ieee80211_vif *vif)
678 {
679 if (band == IEEE80211_BAND_5GHZ) {
680 ctx->staging.flags &=
681 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
682 | RXON_FLG_CCK_MSK);
683 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
684 } else {
685 /* Copied from iwl_post_associate() */
686 if (vif && vif->bss_conf.use_short_slot)
687 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
688 else
689 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
690
691 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
692 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
693 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
694 }
695 }
696
697 /*
698 * initialize rxon structure with default values from eeprom
699 */
700 void iwl_connection_init_rx_config(struct iwl_priv *priv,
701 struct iwl_rxon_context *ctx)
702 {
703 const struct iwl_channel_info *ch_info;
704
705 memset(&ctx->staging, 0, sizeof(ctx->staging));
706
707 if (!ctx->vif) {
708 ctx->staging.dev_type = ctx->unused_devtype;
709 } else switch (ctx->vif->type) {
710 case NL80211_IFTYPE_AP:
711 ctx->staging.dev_type = ctx->ap_devtype;
712 break;
713
714 case NL80211_IFTYPE_STATION:
715 ctx->staging.dev_type = ctx->station_devtype;
716 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
717 break;
718
719 case NL80211_IFTYPE_ADHOC:
720 ctx->staging.dev_type = ctx->ibss_devtype;
721 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
722 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
723 RXON_FILTER_ACCEPT_GRP_MSK;
724 break;
725
726 default:
727 IWL_ERR(priv, "Unsupported interface type %d\n",
728 ctx->vif->type);
729 break;
730 }
731
732 #if 0
733 /* TODO: Figure out when short_preamble would be set and cache from
734 * that */
735 if (!hw_to_local(priv->hw)->short_preamble)
736 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
737 else
738 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
739 #endif
740
741 ch_info = iwl_get_channel_info(priv, priv->band,
742 le16_to_cpu(ctx->active.channel));
743
744 if (!ch_info)
745 ch_info = &priv->channel_info[0];
746
747 ctx->staging.channel = cpu_to_le16(ch_info->channel);
748 priv->band = ch_info->band;
749
750 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
751
752 ctx->staging.ofdm_basic_rates =
753 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
754 ctx->staging.cck_basic_rates =
755 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
756
757 /* clear both MIX and PURE40 mode flag */
758 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
759 RXON_FLG_CHANNEL_MODE_PURE_40);
760 if (ctx->vif)
761 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
762
763 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
764 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
765 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
766 }
767
768 void iwl_set_rate(struct iwl_priv *priv)
769 {
770 const struct ieee80211_supported_band *hw = NULL;
771 struct ieee80211_rate *rate;
772 struct iwl_rxon_context *ctx;
773 int i;
774
775 hw = iwl_get_hw_mode(priv, priv->band);
776 if (!hw) {
777 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
778 return;
779 }
780
781 priv->active_rate = 0;
782
783 for (i = 0; i < hw->n_bitrates; i++) {
784 rate = &(hw->bitrates[i]);
785 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
786 priv->active_rate |= (1 << rate->hw_value);
787 }
788
789 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
790
791 for_each_context(priv, ctx) {
792 ctx->staging.cck_basic_rates =
793 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
794
795 ctx->staging.ofdm_basic_rates =
796 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
797 }
798 }
799
800 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
801 {
802 /*
803 * MULTI-FIXME
804 * See iwl_mac_channel_switch.
805 */
806 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
807
808 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
809 return;
810
811 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
812 ieee80211_chswitch_done(ctx->vif, is_success);
813 }
814
815 #ifdef CONFIG_IWLWIFI_DEBUG
816 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
817 struct iwl_rxon_context *ctx)
818 {
819 struct iwl_rxon_cmd *rxon = &ctx->staging;
820
821 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
822 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
823 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
824 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
825 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
826 le32_to_cpu(rxon->filter_flags));
827 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
828 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
829 rxon->ofdm_basic_rates);
830 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
831 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
832 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
833 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
834 }
835 #endif
836
837 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
838 {
839 unsigned long flags;
840 struct iwl_notification_wait *wait_entry;
841
842 spin_lock_irqsave(&priv->_agn.notif_wait_lock, flags);
843 list_for_each_entry(wait_entry, &priv->_agn.notif_waits, list)
844 wait_entry->aborted = true;
845 spin_unlock_irqrestore(&priv->_agn.notif_wait_lock, flags);
846
847 wake_up_all(&priv->_agn.notif_waitq);
848 }
849
850 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
851 {
852 unsigned int reload_msec;
853 unsigned long reload_jiffies;
854
855 /* Set the FW error flag -- cleared on iwl_down */
856 set_bit(STATUS_FW_ERROR, &priv->status);
857
858 /* Cancel currently queued command. */
859 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
860
861 iwlagn_abort_notification_waits(priv);
862
863 /* Keep the restart process from trying to send host
864 * commands by clearing the ready bit */
865 clear_bit(STATUS_READY, &priv->status);
866
867 wake_up_interruptible(&priv->wait_command_queue);
868
869 if (!ondemand) {
870 /*
871 * If firmware keep reloading, then it indicate something
872 * serious wrong and firmware having problem to recover
873 * from it. Instead of keep trying which will fill the syslog
874 * and hang the system, let's just stop it
875 */
876 reload_jiffies = jiffies;
877 reload_msec = jiffies_to_msecs((long) reload_jiffies -
878 (long) priv->reload_jiffies);
879 priv->reload_jiffies = reload_jiffies;
880 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
881 priv->reload_count++;
882 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
883 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
884 return;
885 }
886 } else
887 priv->reload_count = 0;
888 }
889
890 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
891 if (iwlagn_mod_params.restart_fw) {
892 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
893 "Restarting adapter due to uCode error.\n");
894 queue_work(priv->workqueue, &priv->restart);
895 } else
896 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
897 "Detected FW error, but not restarting\n");
898 }
899 }
900
901 /**
902 * iwl_irq_handle_error - called for HW or SW error interrupt from card
903 */
904 void iwl_irq_handle_error(struct iwl_priv *priv)
905 {
906 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
907 if (priv->cfg->internal_wimax_coex &&
908 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
909 APMS_CLK_VAL_MRB_FUNC_MODE) ||
910 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
911 APMG_PS_CTRL_VAL_RESET_REQ))) {
912 /*
913 * Keep the restart process from trying to send host
914 * commands by clearing the ready bit.
915 */
916 clear_bit(STATUS_READY, &priv->status);
917 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
918 wake_up_interruptible(&priv->wait_command_queue);
919 IWL_ERR(priv, "RF is used by WiMAX\n");
920 return;
921 }
922
923 IWL_ERR(priv, "Loaded firmware version: %s\n",
924 priv->hw->wiphy->fw_version);
925
926 iwl_dump_nic_error_log(priv);
927 iwl_dump_csr(priv);
928 iwl_dump_fh(priv, NULL, false);
929 iwl_dump_nic_event_log(priv, false, NULL, false);
930 #ifdef CONFIG_IWLWIFI_DEBUG
931 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
932 iwl_print_rx_config_cmd(priv,
933 &priv->contexts[IWL_RXON_CTX_BSS]);
934 #endif
935
936 iwlagn_fw_error(priv, false);
937 }
938
939 static int iwl_apm_stop_master(struct iwl_priv *priv)
940 {
941 int ret = 0;
942
943 /* stop device's busmaster DMA activity */
944 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
945
946 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
947 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
948 if (ret)
949 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
950
951 IWL_DEBUG_INFO(priv, "stop master\n");
952
953 return ret;
954 }
955
956 void iwl_apm_stop(struct iwl_priv *priv)
957 {
958 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
959
960 clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
961
962 /* Stop device's DMA activity */
963 iwl_apm_stop_master(priv);
964
965 /* Reset the entire device */
966 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
967
968 udelay(10);
969
970 /*
971 * Clear "initialization complete" bit to move adapter from
972 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
973 */
974 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
975 }
976
977
978 /*
979 * Start up NIC's basic functionality after it has been reset
980 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
981 * NOTE: This does not load uCode nor start the embedded processor
982 */
983 int iwl_apm_init(struct iwl_priv *priv)
984 {
985 int ret = 0;
986 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
987
988 /*
989 * Use "set_bit" below rather than "write", to preserve any hardware
990 * bits already set by default after reset.
991 */
992
993 /* Disable L0S exit timer (platform NMI Work/Around) */
994 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
995 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
996
997 /*
998 * Disable L0s without affecting L1;
999 * don't wait for ICH L0s (ICH bug W/A)
1000 */
1001 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1002 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1003
1004 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1005 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1006
1007 /*
1008 * Enable HAP INTA (interrupt from management bus) to
1009 * wake device's PCI Express link L1a -> L0s
1010 */
1011 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1012 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1013
1014 priv->bus.ops->apm_config(&priv->bus);
1015
1016 /* Configure analog phase-lock-loop before activating to D0A */
1017 if (priv->cfg->base_params->pll_cfg_val)
1018 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1019 priv->cfg->base_params->pll_cfg_val);
1020
1021 /*
1022 * Set "initialization complete" bit to move adapter from
1023 * D0U* --> D0A* (powered-up active) state.
1024 */
1025 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1026
1027 /*
1028 * Wait for clock stabilization; once stabilized, access to
1029 * device-internal resources is supported, e.g. iwl_write_prph()
1030 * and accesses to uCode SRAM.
1031 */
1032 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1033 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1034 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1035 if (ret < 0) {
1036 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1037 goto out;
1038 }
1039
1040 /*
1041 * Enable DMA clock and wait for it to stabilize.
1042 *
1043 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1044 * do not disable clocks. This preserves any hardware bits already
1045 * set by default in "CLK_CTRL_REG" after reset.
1046 */
1047 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1048 udelay(20);
1049
1050 /* Disable L1-Active */
1051 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1052 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1053
1054 set_bit(STATUS_DEVICE_ENABLED, &priv->status);
1055
1056 out:
1057 return ret;
1058 }
1059
1060
1061 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1062 {
1063 int ret;
1064 s8 prev_tx_power;
1065 bool defer;
1066 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1067
1068 lockdep_assert_held(&priv->mutex);
1069
1070 if (priv->tx_power_user_lmt == tx_power && !force)
1071 return 0;
1072
1073 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1074 IWL_WARN(priv,
1075 "Requested user TXPOWER %d below lower limit %d.\n",
1076 tx_power,
1077 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1078 return -EINVAL;
1079 }
1080
1081 if (tx_power > priv->tx_power_device_lmt) {
1082 IWL_WARN(priv,
1083 "Requested user TXPOWER %d above upper limit %d.\n",
1084 tx_power, priv->tx_power_device_lmt);
1085 return -EINVAL;
1086 }
1087
1088 if (!iwl_is_ready_rf(priv))
1089 return -EIO;
1090
1091 /* scan complete and commit_rxon use tx_power_next value,
1092 * it always need to be updated for newest request */
1093 priv->tx_power_next = tx_power;
1094
1095 /* do not set tx power when scanning or channel changing */
1096 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1097 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1098 if (defer && !force) {
1099 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1100 return 0;
1101 }
1102
1103 prev_tx_power = priv->tx_power_user_lmt;
1104 priv->tx_power_user_lmt = tx_power;
1105
1106 ret = iwlagn_send_tx_power(priv);
1107
1108 /* if fail to set tx_power, restore the orig. tx power */
1109 if (ret) {
1110 priv->tx_power_user_lmt = prev_tx_power;
1111 priv->tx_power_next = prev_tx_power;
1112 }
1113 return ret;
1114 }
1115
1116 void iwl_send_bt_config(struct iwl_priv *priv)
1117 {
1118 struct iwl_bt_cmd bt_cmd = {
1119 .lead_time = BT_LEAD_TIME_DEF,
1120 .max_kill = BT_MAX_KILL_DEF,
1121 .kill_ack_mask = 0,
1122 .kill_cts_mask = 0,
1123 };
1124
1125 if (!iwlagn_mod_params.bt_coex_active)
1126 bt_cmd.flags = BT_COEX_DISABLE;
1127 else
1128 bt_cmd.flags = BT_COEX_ENABLE;
1129
1130 priv->bt_enable_flag = bt_cmd.flags;
1131 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1132 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1133
1134 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1135 sizeof(struct iwl_bt_cmd), &bt_cmd))
1136 IWL_ERR(priv, "failed to send BT Coex Config\n");
1137 }
1138
1139 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1140 {
1141 struct iwl_statistics_cmd statistics_cmd = {
1142 .configuration_flags =
1143 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1144 };
1145
1146 if (flags & CMD_ASYNC)
1147 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1148 sizeof(struct iwl_statistics_cmd),
1149 &statistics_cmd, NULL);
1150 else
1151 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1152 sizeof(struct iwl_statistics_cmd),
1153 &statistics_cmd);
1154 }
1155
1156 void iwl_clear_isr_stats(struct iwl_priv *priv)
1157 {
1158 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1159 }
1160
1161 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1162 const struct ieee80211_tx_queue_params *params)
1163 {
1164 struct iwl_priv *priv = hw->priv;
1165 struct iwl_rxon_context *ctx;
1166 unsigned long flags;
1167 int q;
1168
1169 IWL_DEBUG_MAC80211(priv, "enter\n");
1170
1171 if (!iwl_is_ready_rf(priv)) {
1172 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1173 return -EIO;
1174 }
1175
1176 if (queue >= AC_NUM) {
1177 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1178 return 0;
1179 }
1180
1181 q = AC_NUM - 1 - queue;
1182
1183 spin_lock_irqsave(&priv->lock, flags);
1184
1185 /*
1186 * MULTI-FIXME
1187 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1188 */
1189 for_each_context(priv, ctx) {
1190 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1191 cpu_to_le16(params->cw_min);
1192 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1193 cpu_to_le16(params->cw_max);
1194 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1195 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1196 cpu_to_le16((params->txop * 32));
1197
1198 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1199 }
1200
1201 spin_unlock_irqrestore(&priv->lock, flags);
1202
1203 IWL_DEBUG_MAC80211(priv, "leave\n");
1204 return 0;
1205 }
1206
1207 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1208 {
1209 struct iwl_priv *priv = hw->priv;
1210
1211 return priv->ibss_manager == IWL_IBSS_MANAGER;
1212 }
1213
1214 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1215 {
1216 iwl_connection_init_rx_config(priv, ctx);
1217
1218 iwlagn_set_rxon_chain(priv, ctx);
1219
1220 return iwlagn_commit_rxon(priv, ctx);
1221 }
1222
1223 static int iwl_setup_interface(struct iwl_priv *priv,
1224 struct iwl_rxon_context *ctx)
1225 {
1226 struct ieee80211_vif *vif = ctx->vif;
1227 int err;
1228
1229 lockdep_assert_held(&priv->mutex);
1230
1231 /*
1232 * This variable will be correct only when there's just
1233 * a single context, but all code using it is for hardware
1234 * that supports only one context.
1235 */
1236 priv->iw_mode = vif->type;
1237
1238 ctx->is_active = true;
1239
1240 err = iwl_set_mode(priv, ctx);
1241 if (err) {
1242 if (!ctx->always_active)
1243 ctx->is_active = false;
1244 return err;
1245 }
1246
1247 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1248 vif->type == NL80211_IFTYPE_ADHOC) {
1249 /*
1250 * pretend to have high BT traffic as long as we
1251 * are operating in IBSS mode, as this will cause
1252 * the rate scaling etc. to behave as intended.
1253 */
1254 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1255 }
1256
1257 return 0;
1258 }
1259
1260 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1261 {
1262 struct iwl_priv *priv = hw->priv;
1263 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1264 struct iwl_rxon_context *tmp, *ctx = NULL;
1265 int err;
1266 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1267
1268 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1269 viftype, vif->addr);
1270
1271 mutex_lock(&priv->mutex);
1272
1273 if (!iwl_is_ready_rf(priv)) {
1274 IWL_WARN(priv, "Try to add interface when device not ready\n");
1275 err = -EINVAL;
1276 goto out;
1277 }
1278
1279 for_each_context(priv, tmp) {
1280 u32 possible_modes =
1281 tmp->interface_modes | tmp->exclusive_interface_modes;
1282
1283 if (tmp->vif) {
1284 /* check if this busy context is exclusive */
1285 if (tmp->exclusive_interface_modes &
1286 BIT(tmp->vif->type)) {
1287 err = -EINVAL;
1288 goto out;
1289 }
1290 continue;
1291 }
1292
1293 if (!(possible_modes & BIT(viftype)))
1294 continue;
1295
1296 /* have maybe usable context w/o interface */
1297 ctx = tmp;
1298 break;
1299 }
1300
1301 if (!ctx) {
1302 err = -EOPNOTSUPP;
1303 goto out;
1304 }
1305
1306 vif_priv->ctx = ctx;
1307 ctx->vif = vif;
1308
1309 err = iwl_setup_interface(priv, ctx);
1310 if (!err)
1311 goto out;
1312
1313 ctx->vif = NULL;
1314 priv->iw_mode = NL80211_IFTYPE_STATION;
1315 out:
1316 mutex_unlock(&priv->mutex);
1317
1318 IWL_DEBUG_MAC80211(priv, "leave\n");
1319 return err;
1320 }
1321
1322 static void iwl_teardown_interface(struct iwl_priv *priv,
1323 struct ieee80211_vif *vif,
1324 bool mode_change)
1325 {
1326 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1327
1328 lockdep_assert_held(&priv->mutex);
1329
1330 if (priv->scan_vif == vif) {
1331 iwl_scan_cancel_timeout(priv, 200);
1332 iwl_force_scan_end(priv);
1333 }
1334
1335 if (!mode_change) {
1336 iwl_set_mode(priv, ctx);
1337 if (!ctx->always_active)
1338 ctx->is_active = false;
1339 }
1340
1341 /*
1342 * When removing the IBSS interface, overwrite the
1343 * BT traffic load with the stored one from the last
1344 * notification, if any. If this is a device that
1345 * doesn't implement this, this has no effect since
1346 * both values are the same and zero.
1347 */
1348 if (vif->type == NL80211_IFTYPE_ADHOC)
1349 priv->bt_traffic_load = priv->last_bt_traffic_load;
1350 }
1351
1352 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1353 struct ieee80211_vif *vif)
1354 {
1355 struct iwl_priv *priv = hw->priv;
1356 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1357
1358 IWL_DEBUG_MAC80211(priv, "enter\n");
1359
1360 mutex_lock(&priv->mutex);
1361
1362 WARN_ON(ctx->vif != vif);
1363 ctx->vif = NULL;
1364
1365 iwl_teardown_interface(priv, vif, false);
1366
1367 mutex_unlock(&priv->mutex);
1368
1369 IWL_DEBUG_MAC80211(priv, "leave\n");
1370
1371 }
1372
1373 #ifdef CONFIG_IWLWIFI_DEBUGFS
1374
1375 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1376
1377 void iwl_reset_traffic_log(struct iwl_priv *priv)
1378 {
1379 priv->tx_traffic_idx = 0;
1380 priv->rx_traffic_idx = 0;
1381 if (priv->tx_traffic)
1382 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1383 if (priv->rx_traffic)
1384 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1385 }
1386
1387 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1388 {
1389 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1390
1391 if (iwl_debug_level & IWL_DL_TX) {
1392 if (!priv->tx_traffic) {
1393 priv->tx_traffic =
1394 kzalloc(traffic_size, GFP_KERNEL);
1395 if (!priv->tx_traffic)
1396 return -ENOMEM;
1397 }
1398 }
1399 if (iwl_debug_level & IWL_DL_RX) {
1400 if (!priv->rx_traffic) {
1401 priv->rx_traffic =
1402 kzalloc(traffic_size, GFP_KERNEL);
1403 if (!priv->rx_traffic)
1404 return -ENOMEM;
1405 }
1406 }
1407 iwl_reset_traffic_log(priv);
1408 return 0;
1409 }
1410
1411 void iwl_free_traffic_mem(struct iwl_priv *priv)
1412 {
1413 kfree(priv->tx_traffic);
1414 priv->tx_traffic = NULL;
1415
1416 kfree(priv->rx_traffic);
1417 priv->rx_traffic = NULL;
1418 }
1419
1420 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1421 u16 length, struct ieee80211_hdr *header)
1422 {
1423 __le16 fc;
1424 u16 len;
1425
1426 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1427 return;
1428
1429 if (!priv->tx_traffic)
1430 return;
1431
1432 fc = header->frame_control;
1433 if (ieee80211_is_data(fc)) {
1434 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1435 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1436 memcpy((priv->tx_traffic +
1437 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1438 header, len);
1439 priv->tx_traffic_idx =
1440 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1441 }
1442 }
1443
1444 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1445 u16 length, struct ieee80211_hdr *header)
1446 {
1447 __le16 fc;
1448 u16 len;
1449
1450 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1451 return;
1452
1453 if (!priv->rx_traffic)
1454 return;
1455
1456 fc = header->frame_control;
1457 if (ieee80211_is_data(fc)) {
1458 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1459 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1460 memcpy((priv->rx_traffic +
1461 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1462 header, len);
1463 priv->rx_traffic_idx =
1464 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1465 }
1466 }
1467
1468 const char *get_mgmt_string(int cmd)
1469 {
1470 switch (cmd) {
1471 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1472 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1473 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1474 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1475 IWL_CMD(MANAGEMENT_PROBE_REQ);
1476 IWL_CMD(MANAGEMENT_PROBE_RESP);
1477 IWL_CMD(MANAGEMENT_BEACON);
1478 IWL_CMD(MANAGEMENT_ATIM);
1479 IWL_CMD(MANAGEMENT_DISASSOC);
1480 IWL_CMD(MANAGEMENT_AUTH);
1481 IWL_CMD(MANAGEMENT_DEAUTH);
1482 IWL_CMD(MANAGEMENT_ACTION);
1483 default:
1484 return "UNKNOWN";
1485
1486 }
1487 }
1488
1489 const char *get_ctrl_string(int cmd)
1490 {
1491 switch (cmd) {
1492 IWL_CMD(CONTROL_BACK_REQ);
1493 IWL_CMD(CONTROL_BACK);
1494 IWL_CMD(CONTROL_PSPOLL);
1495 IWL_CMD(CONTROL_RTS);
1496 IWL_CMD(CONTROL_CTS);
1497 IWL_CMD(CONTROL_ACK);
1498 IWL_CMD(CONTROL_CFEND);
1499 IWL_CMD(CONTROL_CFENDACK);
1500 default:
1501 return "UNKNOWN";
1502
1503 }
1504 }
1505
1506 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1507 {
1508 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1509 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1510 }
1511
1512 /*
1513 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1514 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1515 * Use debugFs to display the rx/rx_statistics
1516 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1517 * information will be recorded, but DATA pkt still will be recorded
1518 * for the reason of iwl_led.c need to control the led blinking based on
1519 * number of tx and rx data.
1520 *
1521 */
1522 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1523 {
1524 struct traffic_stats *stats;
1525
1526 if (is_tx)
1527 stats = &priv->tx_stats;
1528 else
1529 stats = &priv->rx_stats;
1530
1531 if (ieee80211_is_mgmt(fc)) {
1532 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1533 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1534 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1535 break;
1536 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1537 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1538 break;
1539 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1540 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1541 break;
1542 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1543 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1544 break;
1545 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1546 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1547 break;
1548 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1549 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1550 break;
1551 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1552 stats->mgmt[MANAGEMENT_BEACON]++;
1553 break;
1554 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1555 stats->mgmt[MANAGEMENT_ATIM]++;
1556 break;
1557 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1558 stats->mgmt[MANAGEMENT_DISASSOC]++;
1559 break;
1560 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1561 stats->mgmt[MANAGEMENT_AUTH]++;
1562 break;
1563 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1564 stats->mgmt[MANAGEMENT_DEAUTH]++;
1565 break;
1566 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1567 stats->mgmt[MANAGEMENT_ACTION]++;
1568 break;
1569 }
1570 } else if (ieee80211_is_ctl(fc)) {
1571 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1572 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1573 stats->ctrl[CONTROL_BACK_REQ]++;
1574 break;
1575 case cpu_to_le16(IEEE80211_STYPE_BACK):
1576 stats->ctrl[CONTROL_BACK]++;
1577 break;
1578 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1579 stats->ctrl[CONTROL_PSPOLL]++;
1580 break;
1581 case cpu_to_le16(IEEE80211_STYPE_RTS):
1582 stats->ctrl[CONTROL_RTS]++;
1583 break;
1584 case cpu_to_le16(IEEE80211_STYPE_CTS):
1585 stats->ctrl[CONTROL_CTS]++;
1586 break;
1587 case cpu_to_le16(IEEE80211_STYPE_ACK):
1588 stats->ctrl[CONTROL_ACK]++;
1589 break;
1590 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1591 stats->ctrl[CONTROL_CFEND]++;
1592 break;
1593 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1594 stats->ctrl[CONTROL_CFENDACK]++;
1595 break;
1596 }
1597 } else {
1598 /* data */
1599 stats->data_cnt++;
1600 stats->data_bytes += len;
1601 }
1602 }
1603 #endif
1604
1605 static void iwl_force_rf_reset(struct iwl_priv *priv)
1606 {
1607 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1608 return;
1609
1610 if (!iwl_is_any_associated(priv)) {
1611 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1612 return;
1613 }
1614 /*
1615 * There is no easy and better way to force reset the radio,
1616 * the only known method is switching channel which will force to
1617 * reset and tune the radio.
1618 * Use internal short scan (single channel) operation to should
1619 * achieve this objective.
1620 * Driver should reset the radio when number of consecutive missed
1621 * beacon, or any other uCode error condition detected.
1622 */
1623 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1624 iwl_internal_short_hw_scan(priv);
1625 }
1626
1627
1628 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1629 {
1630 struct iwl_force_reset *force_reset;
1631
1632 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1633 return -EINVAL;
1634
1635 if (mode >= IWL_MAX_FORCE_RESET) {
1636 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1637 return -EINVAL;
1638 }
1639 force_reset = &priv->force_reset[mode];
1640 force_reset->reset_request_count++;
1641 if (!external) {
1642 if (force_reset->last_force_reset_jiffies &&
1643 time_after(force_reset->last_force_reset_jiffies +
1644 force_reset->reset_duration, jiffies)) {
1645 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1646 force_reset->reset_reject_count++;
1647 return -EAGAIN;
1648 }
1649 }
1650 force_reset->reset_success_count++;
1651 force_reset->last_force_reset_jiffies = jiffies;
1652 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1653 switch (mode) {
1654 case IWL_RF_RESET:
1655 iwl_force_rf_reset(priv);
1656 break;
1657 case IWL_FW_RESET:
1658 /*
1659 * if the request is from external(ex: debugfs),
1660 * then always perform the request in regardless the module
1661 * parameter setting
1662 * if the request is from internal (uCode error or driver
1663 * detect failure), then fw_restart module parameter
1664 * need to be check before performing firmware reload
1665 */
1666 if (!external && !iwlagn_mod_params.restart_fw) {
1667 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1668 "module parameter setting\n");
1669 break;
1670 }
1671 IWL_ERR(priv, "On demand firmware reload\n");
1672 iwlagn_fw_error(priv, true);
1673 break;
1674 }
1675 return 0;
1676 }
1677
1678 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1679 enum nl80211_iftype newtype, bool newp2p)
1680 {
1681 struct iwl_priv *priv = hw->priv;
1682 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1683 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1684 struct iwl_rxon_context *tmp;
1685 enum nl80211_iftype newviftype = newtype;
1686 u32 interface_modes;
1687 int err;
1688
1689 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1690
1691 mutex_lock(&priv->mutex);
1692
1693 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1694 /*
1695 * Huh? But wait ... this can maybe happen when
1696 * we're in the middle of a firmware restart!
1697 */
1698 err = -EBUSY;
1699 goto out;
1700 }
1701
1702 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1703
1704 if (!(interface_modes & BIT(newtype))) {
1705 err = -EBUSY;
1706 goto out;
1707 }
1708
1709 /*
1710 * Refuse a change that should be done by moving from the PAN
1711 * context to the BSS context instead, if the BSS context is
1712 * available and can support the new interface type.
1713 */
1714 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1715 (bss_ctx->interface_modes & BIT(newtype) ||
1716 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1717 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1718 err = -EBUSY;
1719 goto out;
1720 }
1721
1722 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1723 for_each_context(priv, tmp) {
1724 if (ctx == tmp)
1725 continue;
1726
1727 if (!tmp->vif)
1728 continue;
1729
1730 /*
1731 * The current mode switch would be exclusive, but
1732 * another context is active ... refuse the switch.
1733 */
1734 err = -EBUSY;
1735 goto out;
1736 }
1737 }
1738
1739 /* success */
1740 iwl_teardown_interface(priv, vif, true);
1741 vif->type = newviftype;
1742 vif->p2p = newp2p;
1743 err = iwl_setup_interface(priv, ctx);
1744 WARN_ON(err);
1745 /*
1746 * We've switched internally, but submitting to the
1747 * device may have failed for some reason. Mask this
1748 * error, because otherwise mac80211 will not switch
1749 * (and set the interface type back) and we'll be
1750 * out of sync with it.
1751 */
1752 err = 0;
1753
1754 out:
1755 mutex_unlock(&priv->mutex);
1756 return err;
1757 }
1758
1759 /*
1760 * On every watchdog tick we check (latest) time stamp. If it does not
1761 * change during timeout period and queue is not empty we reset firmware.
1762 */
1763 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1764 {
1765 struct iwl_tx_queue *txq = &priv->txq[cnt];
1766 struct iwl_queue *q = &txq->q;
1767 unsigned long timeout;
1768 int ret;
1769
1770 if (q->read_ptr == q->write_ptr) {
1771 txq->time_stamp = jiffies;
1772 return 0;
1773 }
1774
1775 timeout = txq->time_stamp +
1776 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1777
1778 if (time_after(jiffies, timeout)) {
1779 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1780 q->id, priv->cfg->base_params->wd_timeout);
1781 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1782 return (ret == -EAGAIN) ? 0 : 1;
1783 }
1784
1785 return 0;
1786 }
1787
1788 /*
1789 * Making watchdog tick be a quarter of timeout assure we will
1790 * discover the queue hung between timeout and 1.25*timeout
1791 */
1792 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1793
1794 /*
1795 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1796 * we reset the firmware. If everything is fine just rearm the timer.
1797 */
1798 void iwl_bg_watchdog(unsigned long data)
1799 {
1800 struct iwl_priv *priv = (struct iwl_priv *)data;
1801 int cnt;
1802 unsigned long timeout;
1803
1804 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1805 return;
1806
1807 timeout = priv->cfg->base_params->wd_timeout;
1808 if (timeout == 0)
1809 return;
1810
1811 /* monitor and check for stuck cmd queue */
1812 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1813 return;
1814
1815 /* monitor and check for other stuck queues */
1816 if (iwl_is_any_associated(priv)) {
1817 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1818 /* skip as we already checked the command queue */
1819 if (cnt == priv->cmd_queue)
1820 continue;
1821 if (iwl_check_stuck_queue(priv, cnt))
1822 return;
1823 }
1824 }
1825
1826 mod_timer(&priv->watchdog, jiffies +
1827 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1828 }
1829
1830 void iwl_setup_watchdog(struct iwl_priv *priv)
1831 {
1832 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1833
1834 if (timeout && !iwlagn_mod_params.wd_disable)
1835 mod_timer(&priv->watchdog,
1836 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1837 else
1838 del_timer(&priv->watchdog);
1839 }
1840
1841 /*
1842 * extended beacon time format
1843 * time in usec will be changed into a 32-bit value in extended:internal format
1844 * the extended part is the beacon counts
1845 * the internal part is the time in usec within one beacon interval
1846 */
1847 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1848 {
1849 u32 quot;
1850 u32 rem;
1851 u32 interval = beacon_interval * TIME_UNIT;
1852
1853 if (!interval || !usec)
1854 return 0;
1855
1856 quot = (usec / interval) &
1857 (iwl_beacon_time_mask_high(priv,
1858 priv->hw_params.beacon_time_tsf_bits) >>
1859 priv->hw_params.beacon_time_tsf_bits);
1860 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1861 priv->hw_params.beacon_time_tsf_bits);
1862
1863 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1864 }
1865
1866 /* base is usually what we get from ucode with each received frame,
1867 * the same as HW timer counter counting down
1868 */
1869 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1870 u32 addon, u32 beacon_interval)
1871 {
1872 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1873 priv->hw_params.beacon_time_tsf_bits);
1874 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1875 priv->hw_params.beacon_time_tsf_bits);
1876 u32 interval = beacon_interval * TIME_UNIT;
1877 u32 res = (base & iwl_beacon_time_mask_high(priv,
1878 priv->hw_params.beacon_time_tsf_bits)) +
1879 (addon & iwl_beacon_time_mask_high(priv,
1880 priv->hw_params.beacon_time_tsf_bits));
1881
1882 if (base_low > addon_low)
1883 res += base_low - addon_low;
1884 else if (base_low < addon_low) {
1885 res += interval + base_low - addon_low;
1886 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1887 } else
1888 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1889
1890 return cpu_to_le32(res);
1891 }
1892
1893 #ifdef CONFIG_PM
1894
1895 int iwl_suspend(struct iwl_priv *priv)
1896 {
1897 /*
1898 * This function is called when system goes into suspend state
1899 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1900 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1901 * it will not call apm_ops.stop() to stop the DMA operation.
1902 * Calling apm_ops.stop here to make sure we stop the DMA.
1903 */
1904 iwl_apm_stop(priv);
1905
1906 return 0;
1907 }
1908
1909 int iwl_resume(struct iwl_priv *priv)
1910 {
1911 bool hw_rfkill = false;
1912
1913 iwl_enable_interrupts(priv);
1914
1915 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1916 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1917 hw_rfkill = true;
1918
1919 if (hw_rfkill)
1920 set_bit(STATUS_RF_KILL_HW, &priv->status);
1921 else
1922 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1923
1924 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1925
1926 return 0;
1927 }
1928
1929 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree