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iwlagn: fix tx power initialization
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blobaf72fd51ea74261f197d76c274d6de37c052b695
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
45
46 /*
47 * set bt_coex_active to true, uCode will do kill/defer
48 * every time the priority line is asserted (BT is sending signals on the
49 * priority line in the PCIx).
50 * set bt_coex_active to false, uCode will ignore the BT activity and
51 * perform the normal operation
52 *
53 * User might experience transmit issue on some platform due to WiFi/BT
54 * co-exist problem. The possible behaviors are:
55 * Able to scan and finding all the available AP
56 * Not able to associate with any AP
57 * On those platforms, WiFi communication can be restored by set
58 * "bt_coex_active" module parameter to "false"
59 *
60 * default: bt_coex_active = true (BT_COEX_ENABLE)
61 */
62 bool bt_coex_active = true;
63 module_param(bt_coex_active, bool, S_IRUGO);
64 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
65
66 u32 iwl_debug_level;
67
68 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
69
70 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
71 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
72 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
73 struct ieee80211_sta_ht_cap *ht_info,
74 enum ieee80211_band band)
75 {
76 u16 max_bit_rate = 0;
77 u8 rx_chains_num = priv->hw_params.rx_chains_num;
78 u8 tx_chains_num = priv->hw_params.tx_chains_num;
79
80 ht_info->cap = 0;
81 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
82
83 ht_info->ht_supported = true;
84
85 if (priv->cfg->ht_params &&
86 priv->cfg->ht_params->ht_greenfield_support)
87 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
88 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
89 max_bit_rate = MAX_BIT_RATE_20_MHZ;
90 if (priv->hw_params.ht40_channel & BIT(band)) {
91 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
92 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
93 ht_info->mcs.rx_mask[4] = 0x01;
94 max_bit_rate = MAX_BIT_RATE_40_MHZ;
95 }
96
97 if (priv->cfg->mod_params->amsdu_size_8K)
98 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
99
100 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
101 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
102 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
103 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
104 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
105 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
106
107 ht_info->mcs.rx_mask[0] = 0xFF;
108 if (rx_chains_num >= 2)
109 ht_info->mcs.rx_mask[1] = 0xFF;
110 if (rx_chains_num >= 3)
111 ht_info->mcs.rx_mask[2] = 0xFF;
112
113 /* Highest supported Rx data rate */
114 max_bit_rate *= rx_chains_num;
115 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
116 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
117
118 /* Tx MCS capabilities */
119 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
120 if (tx_chains_num != rx_chains_num) {
121 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
122 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
123 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
124 }
125 }
126
127 /**
128 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
129 */
130 int iwlcore_init_geos(struct iwl_priv *priv)
131 {
132 struct iwl_channel_info *ch;
133 struct ieee80211_supported_band *sband;
134 struct ieee80211_channel *channels;
135 struct ieee80211_channel *geo_ch;
136 struct ieee80211_rate *rates;
137 int i = 0;
138 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
139
140 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
141 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
142 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
143 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
144 return 0;
145 }
146
147 channels = kzalloc(sizeof(struct ieee80211_channel) *
148 priv->channel_count, GFP_KERNEL);
149 if (!channels)
150 return -ENOMEM;
151
152 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
153 GFP_KERNEL);
154 if (!rates) {
155 kfree(channels);
156 return -ENOMEM;
157 }
158
159 /* 5.2GHz channels start after the 2.4GHz channels */
160 sband = &priv->bands[IEEE80211_BAND_5GHZ];
161 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
162 /* just OFDM */
163 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
164 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
165
166 if (priv->cfg->sku & IWL_SKU_N)
167 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
168 IEEE80211_BAND_5GHZ);
169
170 sband = &priv->bands[IEEE80211_BAND_2GHZ];
171 sband->channels = channels;
172 /* OFDM & CCK */
173 sband->bitrates = rates;
174 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
175
176 if (priv->cfg->sku & IWL_SKU_N)
177 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
178 IEEE80211_BAND_2GHZ);
179
180 priv->ieee_channels = channels;
181 priv->ieee_rates = rates;
182
183 for (i = 0; i < priv->channel_count; i++) {
184 ch = &priv->channel_info[i];
185
186 /* FIXME: might be removed if scan is OK */
187 if (!is_channel_valid(ch))
188 continue;
189
190 sband = &priv->bands[ch->band];
191
192 geo_ch = &sband->channels[sband->n_channels++];
193
194 geo_ch->center_freq =
195 ieee80211_channel_to_frequency(ch->channel, ch->band);
196 geo_ch->max_power = ch->max_power_avg;
197 geo_ch->max_antenna_gain = 0xff;
198 geo_ch->hw_value = ch->channel;
199
200 if (is_channel_valid(ch)) {
201 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
202 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
203
204 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
205 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
206
207 if (ch->flags & EEPROM_CHANNEL_RADAR)
208 geo_ch->flags |= IEEE80211_CHAN_RADAR;
209
210 geo_ch->flags |= ch->ht40_extension_channel;
211
212 if (ch->max_power_avg > max_tx_power)
213 max_tx_power = ch->max_power_avg;
214 } else {
215 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
216 }
217
218 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
219 ch->channel, geo_ch->center_freq,
220 is_channel_a_band(ch) ? "5.2" : "2.4",
221 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
222 "restricted" : "valid",
223 geo_ch->flags);
224 }
225
226 priv->tx_power_device_lmt = max_tx_power;
227 priv->tx_power_user_lmt = max_tx_power;
228 priv->tx_power_next = max_tx_power;
229
230 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
231 priv->cfg->sku & IWL_SKU_A) {
232 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
233 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
234 priv->pci_dev->device,
235 priv->pci_dev->subsystem_device);
236 priv->cfg->sku &= ~IWL_SKU_A;
237 }
238
239 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
240 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
241 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
242
243 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
244
245 return 0;
246 }
247
248 /*
249 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
250 */
251 void iwlcore_free_geos(struct iwl_priv *priv)
252 {
253 kfree(priv->ieee_channels);
254 kfree(priv->ieee_rates);
255 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
256 }
257
258 static bool iwl_is_channel_extension(struct iwl_priv *priv,
259 enum ieee80211_band band,
260 u16 channel, u8 extension_chan_offset)
261 {
262 const struct iwl_channel_info *ch_info;
263
264 ch_info = iwl_get_channel_info(priv, band, channel);
265 if (!is_channel_valid(ch_info))
266 return false;
267
268 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
269 return !(ch_info->ht40_extension_channel &
270 IEEE80211_CHAN_NO_HT40PLUS);
271 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
272 return !(ch_info->ht40_extension_channel &
273 IEEE80211_CHAN_NO_HT40MINUS);
274
275 return false;
276 }
277
278 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
279 struct iwl_rxon_context *ctx,
280 struct ieee80211_sta_ht_cap *ht_cap)
281 {
282 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
283 return false;
284
285 /*
286 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
287 * the bit will not set if it is pure 40MHz case
288 */
289 if (ht_cap && !ht_cap->ht_supported)
290 return false;
291
292 #ifdef CONFIG_IWLWIFI_DEBUGFS
293 if (priv->disable_ht40)
294 return false;
295 #endif
296
297 return iwl_is_channel_extension(priv, priv->band,
298 le16_to_cpu(ctx->staging.channel),
299 ctx->ht.extension_chan_offset);
300 }
301
302 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
303 {
304 u16 new_val;
305 u16 beacon_factor;
306
307 /*
308 * If mac80211 hasn't given us a beacon interval, program
309 * the default into the device (not checking this here
310 * would cause the adjustment below to return the maximum
311 * value, which may break PAN.)
312 */
313 if (!beacon_val)
314 return DEFAULT_BEACON_INTERVAL;
315
316 /*
317 * If the beacon interval we obtained from the peer
318 * is too large, we'll have to wake up more often
319 * (and in IBSS case, we'll beacon too much)
320 *
321 * For example, if max_beacon_val is 4096, and the
322 * requested beacon interval is 7000, we'll have to
323 * use 3500 to be able to wake up on the beacons.
324 *
325 * This could badly influence beacon detection stats.
326 */
327
328 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
329 new_val = beacon_val / beacon_factor;
330
331 if (!new_val)
332 new_val = max_beacon_val;
333
334 return new_val;
335 }
336
337 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
338 {
339 u64 tsf;
340 s32 interval_tm, rem;
341 struct ieee80211_conf *conf = NULL;
342 u16 beacon_int;
343 struct ieee80211_vif *vif = ctx->vif;
344
345 conf = ieee80211_get_hw_conf(priv->hw);
346
347 lockdep_assert_held(&priv->mutex);
348
349 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
350
351 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
352 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
353
354 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
355
356 /*
357 * TODO: For IBSS we need to get atim_window from mac80211,
358 * for now just always use 0
359 */
360 ctx->timing.atim_window = 0;
361
362 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
363 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
364 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
365 priv->contexts[IWL_RXON_CTX_BSS].vif &&
366 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
367 ctx->timing.beacon_interval =
368 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
369 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
370 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
371 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
372 priv->contexts[IWL_RXON_CTX_PAN].vif &&
373 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
374 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
375 !ctx->vif->bss_conf.beacon_int)) {
376 ctx->timing.beacon_interval =
377 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
378 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
379 } else {
380 beacon_int = iwl_adjust_beacon_interval(beacon_int,
381 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
382 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
383 }
384
385 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
386 interval_tm = beacon_int * TIME_UNIT;
387 rem = do_div(tsf, interval_tm);
388 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
389
390 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
391
392 IWL_DEBUG_ASSOC(priv,
393 "beacon interval %d beacon timer %d beacon tim %d\n",
394 le16_to_cpu(ctx->timing.beacon_interval),
395 le32_to_cpu(ctx->timing.beacon_init_val),
396 le16_to_cpu(ctx->timing.atim_window));
397
398 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
399 sizeof(ctx->timing), &ctx->timing);
400 }
401
402 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
403 int hw_decrypt)
404 {
405 struct iwl_rxon_cmd *rxon = &ctx->staging;
406
407 if (hw_decrypt)
408 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
409 else
410 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
411
412 }
413
414 /* validate RXON structure is valid */
415 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
416 {
417 struct iwl_rxon_cmd *rxon = &ctx->staging;
418 bool error = false;
419
420 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
421 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
422 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
423 error = true;
424 }
425 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
426 IWL_WARN(priv, "check 2.4G: wrong radar\n");
427 error = true;
428 }
429 } else {
430 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
431 IWL_WARN(priv, "check 5.2G: not short slot!\n");
432 error = true;
433 }
434 if (rxon->flags & RXON_FLG_CCK_MSK) {
435 IWL_WARN(priv, "check 5.2G: CCK!\n");
436 error = true;
437 }
438 }
439 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
440 IWL_WARN(priv, "mac/bssid mcast!\n");
441 error = true;
442 }
443
444 /* make sure basic rates 6Mbps and 1Mbps are supported */
445 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
446 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
447 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
448 error = true;
449 }
450
451 if (le16_to_cpu(rxon->assoc_id) > 2007) {
452 IWL_WARN(priv, "aid > 2007\n");
453 error = true;
454 }
455
456 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
457 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
458 IWL_WARN(priv, "CCK and short slot\n");
459 error = true;
460 }
461
462 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
463 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
464 IWL_WARN(priv, "CCK and auto detect");
465 error = true;
466 }
467
468 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
469 RXON_FLG_TGG_PROTECT_MSK)) ==
470 RXON_FLG_TGG_PROTECT_MSK) {
471 IWL_WARN(priv, "TGg but no auto-detect\n");
472 error = true;
473 }
474
475 if (error)
476 IWL_WARN(priv, "Tuning to channel %d\n",
477 le16_to_cpu(rxon->channel));
478
479 if (error) {
480 IWL_ERR(priv, "Invalid RXON\n");
481 return -EINVAL;
482 }
483 return 0;
484 }
485
486 /**
487 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
488 * @priv: staging_rxon is compared to active_rxon
489 *
490 * If the RXON structure is changing enough to require a new tune,
491 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
492 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
493 */
494 int iwl_full_rxon_required(struct iwl_priv *priv,
495 struct iwl_rxon_context *ctx)
496 {
497 const struct iwl_rxon_cmd *staging = &ctx->staging;
498 const struct iwl_rxon_cmd *active = &ctx->active;
499
500 #define CHK(cond) \
501 if ((cond)) { \
502 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
503 return 1; \
504 }
505
506 #define CHK_NEQ(c1, c2) \
507 if ((c1) != (c2)) { \
508 IWL_DEBUG_INFO(priv, "need full RXON - " \
509 #c1 " != " #c2 " - %d != %d\n", \
510 (c1), (c2)); \
511 return 1; \
512 }
513
514 /* These items are only settable from the full RXON command */
515 CHK(!iwl_is_associated_ctx(ctx));
516 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
517 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
518 CHK(compare_ether_addr(staging->wlap_bssid_addr,
519 active->wlap_bssid_addr));
520 CHK_NEQ(staging->dev_type, active->dev_type);
521 CHK_NEQ(staging->channel, active->channel);
522 CHK_NEQ(staging->air_propagation, active->air_propagation);
523 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
524 active->ofdm_ht_single_stream_basic_rates);
525 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
526 active->ofdm_ht_dual_stream_basic_rates);
527 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
528 active->ofdm_ht_triple_stream_basic_rates);
529 CHK_NEQ(staging->assoc_id, active->assoc_id);
530
531 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
532 * be updated with the RXON_ASSOC command -- however only some
533 * flag transitions are allowed using RXON_ASSOC */
534
535 /* Check if we are not switching bands */
536 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
537 active->flags & RXON_FLG_BAND_24G_MSK);
538
539 /* Check if we are switching association toggle */
540 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
541 active->filter_flags & RXON_FILTER_ASSOC_MSK);
542
543 #undef CHK
544 #undef CHK_NEQ
545
546 return 0;
547 }
548
549 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
550 struct iwl_rxon_context *ctx)
551 {
552 /*
553 * Assign the lowest rate -- should really get this from
554 * the beacon skb from mac80211.
555 */
556 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
557 return IWL_RATE_1M_PLCP;
558 else
559 return IWL_RATE_6M_PLCP;
560 }
561
562 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
563 struct iwl_ht_config *ht_conf,
564 struct iwl_rxon_context *ctx)
565 {
566 struct iwl_rxon_cmd *rxon = &ctx->staging;
567
568 if (!ctx->ht.enabled) {
569 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
570 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
571 RXON_FLG_HT40_PROT_MSK |
572 RXON_FLG_HT_PROT_MSK);
573 return;
574 }
575
576 /* FIXME: if the definition of ht.protection changed, the "translation"
577 * will be needed for rxon->flags
578 */
579 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
580
581 /* Set up channel bandwidth:
582 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
583 /* clear the HT channel mode before set the mode */
584 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
585 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
586 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
587 /* pure ht40 */
588 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
589 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
590 /* Note: control channel is opposite of extension channel */
591 switch (ctx->ht.extension_chan_offset) {
592 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
593 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
594 break;
595 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
596 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
597 break;
598 }
599 } else {
600 /* Note: control channel is opposite of extension channel */
601 switch (ctx->ht.extension_chan_offset) {
602 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
603 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
604 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
605 break;
606 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
607 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
608 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
609 break;
610 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
611 default:
612 /* channel location only valid if in Mixed mode */
613 IWL_ERR(priv, "invalid extension channel offset\n");
614 break;
615 }
616 }
617 } else {
618 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
619 }
620
621 if (priv->cfg->ops->hcmd->set_rxon_chain)
622 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
623
624 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
625 "extension channel offset 0x%x\n",
626 le32_to_cpu(rxon->flags), ctx->ht.protection,
627 ctx->ht.extension_chan_offset);
628 }
629
630 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
631 {
632 struct iwl_rxon_context *ctx;
633
634 for_each_context(priv, ctx)
635 _iwl_set_rxon_ht(priv, ht_conf, ctx);
636 }
637
638 /* Return valid, unused, channel for a passive scan to reset the RF */
639 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
640 enum ieee80211_band band)
641 {
642 const struct iwl_channel_info *ch_info;
643 int i;
644 u8 channel = 0;
645 u8 min, max;
646 struct iwl_rxon_context *ctx;
647
648 if (band == IEEE80211_BAND_5GHZ) {
649 min = 14;
650 max = priv->channel_count;
651 } else {
652 min = 0;
653 max = 14;
654 }
655
656 for (i = min; i < max; i++) {
657 bool busy = false;
658
659 for_each_context(priv, ctx) {
660 busy = priv->channel_info[i].channel ==
661 le16_to_cpu(ctx->staging.channel);
662 if (busy)
663 break;
664 }
665
666 if (busy)
667 continue;
668
669 channel = priv->channel_info[i].channel;
670 ch_info = iwl_get_channel_info(priv, band, channel);
671 if (is_channel_valid(ch_info))
672 break;
673 }
674
675 return channel;
676 }
677
678 /**
679 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
680 * @ch: requested channel as a pointer to struct ieee80211_channel
681
682 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
683 * in the staging RXON flag structure based on the ch->band
684 */
685 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
686 struct iwl_rxon_context *ctx)
687 {
688 enum ieee80211_band band = ch->band;
689 u16 channel = ch->hw_value;
690
691 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
692 (priv->band == band))
693 return 0;
694
695 ctx->staging.channel = cpu_to_le16(channel);
696 if (band == IEEE80211_BAND_5GHZ)
697 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
698 else
699 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
700
701 priv->band = band;
702
703 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
704
705 return 0;
706 }
707
708 void iwl_set_flags_for_band(struct iwl_priv *priv,
709 struct iwl_rxon_context *ctx,
710 enum ieee80211_band band,
711 struct ieee80211_vif *vif)
712 {
713 if (band == IEEE80211_BAND_5GHZ) {
714 ctx->staging.flags &=
715 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
716 | RXON_FLG_CCK_MSK);
717 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
718 } else {
719 /* Copied from iwl_post_associate() */
720 if (vif && vif->bss_conf.use_short_slot)
721 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
722 else
723 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
724
725 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
726 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
727 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
728 }
729 }
730
731 /*
732 * initialize rxon structure with default values from eeprom
733 */
734 void iwl_connection_init_rx_config(struct iwl_priv *priv,
735 struct iwl_rxon_context *ctx)
736 {
737 const struct iwl_channel_info *ch_info;
738
739 memset(&ctx->staging, 0, sizeof(ctx->staging));
740
741 if (!ctx->vif) {
742 ctx->staging.dev_type = ctx->unused_devtype;
743 } else switch (ctx->vif->type) {
744 case NL80211_IFTYPE_AP:
745 ctx->staging.dev_type = ctx->ap_devtype;
746 break;
747
748 case NL80211_IFTYPE_STATION:
749 ctx->staging.dev_type = ctx->station_devtype;
750 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
751 break;
752
753 case NL80211_IFTYPE_ADHOC:
754 ctx->staging.dev_type = ctx->ibss_devtype;
755 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
756 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
757 RXON_FILTER_ACCEPT_GRP_MSK;
758 break;
759
760 default:
761 IWL_ERR(priv, "Unsupported interface type %d\n",
762 ctx->vif->type);
763 break;
764 }
765
766 #if 0
767 /* TODO: Figure out when short_preamble would be set and cache from
768 * that */
769 if (!hw_to_local(priv->hw)->short_preamble)
770 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
771 else
772 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
773 #endif
774
775 ch_info = iwl_get_channel_info(priv, priv->band,
776 le16_to_cpu(ctx->active.channel));
777
778 if (!ch_info)
779 ch_info = &priv->channel_info[0];
780
781 ctx->staging.channel = cpu_to_le16(ch_info->channel);
782 priv->band = ch_info->band;
783
784 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
785
786 ctx->staging.ofdm_basic_rates =
787 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
788 ctx->staging.cck_basic_rates =
789 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
790
791 /* clear both MIX and PURE40 mode flag */
792 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
793 RXON_FLG_CHANNEL_MODE_PURE_40);
794 if (ctx->vif)
795 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
796
797 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
798 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
799 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
800 }
801
802 void iwl_set_rate(struct iwl_priv *priv)
803 {
804 const struct ieee80211_supported_band *hw = NULL;
805 struct ieee80211_rate *rate;
806 struct iwl_rxon_context *ctx;
807 int i;
808
809 hw = iwl_get_hw_mode(priv, priv->band);
810 if (!hw) {
811 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
812 return;
813 }
814
815 priv->active_rate = 0;
816
817 for (i = 0; i < hw->n_bitrates; i++) {
818 rate = &(hw->bitrates[i]);
819 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
820 priv->active_rate |= (1 << rate->hw_value);
821 }
822
823 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
824
825 for_each_context(priv, ctx) {
826 ctx->staging.cck_basic_rates =
827 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
828
829 ctx->staging.ofdm_basic_rates =
830 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
831 }
832 }
833
834 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
835 {
836 /*
837 * MULTI-FIXME
838 * See iwl_mac_channel_switch.
839 */
840 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
841
842 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
843 return;
844
845 if (priv->switch_rxon.switch_in_progress) {
846 ieee80211_chswitch_done(ctx->vif, is_success);
847 mutex_lock(&priv->mutex);
848 priv->switch_rxon.switch_in_progress = false;
849 mutex_unlock(&priv->mutex);
850 }
851 }
852
853 #ifdef CONFIG_IWLWIFI_DEBUG
854 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
855 struct iwl_rxon_context *ctx)
856 {
857 struct iwl_rxon_cmd *rxon = &ctx->staging;
858
859 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
860 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
861 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
862 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
863 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
864 le32_to_cpu(rxon->filter_flags));
865 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
866 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
867 rxon->ofdm_basic_rates);
868 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
869 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
870 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
871 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
872 }
873 #endif
874
875 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
876 {
877 unsigned long flags;
878 struct iwl_notification_wait *wait_entry;
879
880 spin_lock_irqsave(&priv->_agn.notif_wait_lock, flags);
881 list_for_each_entry(wait_entry, &priv->_agn.notif_waits, list)
882 wait_entry->aborted = true;
883 spin_unlock_irqrestore(&priv->_agn.notif_wait_lock, flags);
884
885 wake_up_all(&priv->_agn.notif_waitq);
886 }
887
888 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
889 {
890 unsigned int reload_msec;
891 unsigned long reload_jiffies;
892
893 /* Set the FW error flag -- cleared on iwl_down */
894 set_bit(STATUS_FW_ERROR, &priv->status);
895
896 /* Cancel currently queued command. */
897 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
898
899 iwlagn_abort_notification_waits(priv);
900
901 /* Keep the restart process from trying to send host
902 * commands by clearing the ready bit */
903 clear_bit(STATUS_READY, &priv->status);
904
905 wake_up_interruptible(&priv->wait_command_queue);
906
907 if (!ondemand) {
908 /*
909 * If firmware keep reloading, then it indicate something
910 * serious wrong and firmware having problem to recover
911 * from it. Instead of keep trying which will fill the syslog
912 * and hang the system, let's just stop it
913 */
914 reload_jiffies = jiffies;
915 reload_msec = jiffies_to_msecs((long) reload_jiffies -
916 (long) priv->reload_jiffies);
917 priv->reload_jiffies = reload_jiffies;
918 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
919 priv->reload_count++;
920 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
921 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
922 return;
923 }
924 } else
925 priv->reload_count = 0;
926 }
927
928 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
929 if (priv->cfg->mod_params->restart_fw) {
930 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
931 "Restarting adapter due to uCode error.\n");
932 queue_work(priv->workqueue, &priv->restart);
933 } else
934 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
935 "Detected FW error, but not restarting\n");
936 }
937 }
938
939 /**
940 * iwl_irq_handle_error - called for HW or SW error interrupt from card
941 */
942 void iwl_irq_handle_error(struct iwl_priv *priv)
943 {
944 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
945 if (priv->cfg->internal_wimax_coex &&
946 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
947 APMS_CLK_VAL_MRB_FUNC_MODE) ||
948 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
949 APMG_PS_CTRL_VAL_RESET_REQ))) {
950 /*
951 * Keep the restart process from trying to send host
952 * commands by clearing the ready bit.
953 */
954 clear_bit(STATUS_READY, &priv->status);
955 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
956 wake_up_interruptible(&priv->wait_command_queue);
957 IWL_ERR(priv, "RF is used by WiMAX\n");
958 return;
959 }
960
961 IWL_ERR(priv, "Loaded firmware version: %s\n",
962 priv->hw->wiphy->fw_version);
963
964 iwl_dump_nic_error_log(priv);
965 iwl_dump_csr(priv);
966 iwl_dump_fh(priv, NULL, false);
967 iwl_dump_nic_event_log(priv, false, NULL, false);
968 #ifdef CONFIG_IWLWIFI_DEBUG
969 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
970 iwl_print_rx_config_cmd(priv,
971 &priv->contexts[IWL_RXON_CTX_BSS]);
972 #endif
973
974 iwlagn_fw_error(priv, false);
975 }
976
977 static int iwl_apm_stop_master(struct iwl_priv *priv)
978 {
979 int ret = 0;
980
981 /* stop device's busmaster DMA activity */
982 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
983
984 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
985 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
986 if (ret)
987 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
988
989 IWL_DEBUG_INFO(priv, "stop master\n");
990
991 return ret;
992 }
993
994 void iwl_apm_stop(struct iwl_priv *priv)
995 {
996 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
997
998 /* Stop device's DMA activity */
999 iwl_apm_stop_master(priv);
1000
1001 /* Reset the entire device */
1002 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1003
1004 udelay(10);
1005
1006 /*
1007 * Clear "initialization complete" bit to move adapter from
1008 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1009 */
1010 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1011 }
1012
1013
1014 /*
1015 * Start up NIC's basic functionality after it has been reset
1016 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1017 * NOTE: This does not load uCode nor start the embedded processor
1018 */
1019 int iwl_apm_init(struct iwl_priv *priv)
1020 {
1021 int ret = 0;
1022 u16 lctl;
1023
1024 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1025
1026 /*
1027 * Use "set_bit" below rather than "write", to preserve any hardware
1028 * bits already set by default after reset.
1029 */
1030
1031 /* Disable L0S exit timer (platform NMI Work/Around) */
1032 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1033 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1034
1035 /*
1036 * Disable L0s without affecting L1;
1037 * don't wait for ICH L0s (ICH bug W/A)
1038 */
1039 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1040 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1041
1042 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1043 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1044
1045 /*
1046 * Enable HAP INTA (interrupt from management bus) to
1047 * wake device's PCI Express link L1a -> L0s
1048 */
1049 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1050 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1051
1052 /*
1053 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1054 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1055 * If so (likely), disable L0S, so device moves directly L0->L1;
1056 * costs negligible amount of power savings.
1057 * If not (unlikely), enable L0S, so there is at least some
1058 * power savings, even without L1.
1059 */
1060 lctl = iwl_pcie_link_ctl(priv);
1061 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1062 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1063 /* L1-ASPM enabled; disable(!) L0S */
1064 iwl_set_bit(priv, CSR_GIO_REG,
1065 CSR_GIO_REG_VAL_L0S_ENABLED);
1066 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1067 } else {
1068 /* L1-ASPM disabled; enable(!) L0S */
1069 iwl_clear_bit(priv, CSR_GIO_REG,
1070 CSR_GIO_REG_VAL_L0S_ENABLED);
1071 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1072 }
1073
1074 /* Configure analog phase-lock-loop before activating to D0A */
1075 if (priv->cfg->base_params->pll_cfg_val)
1076 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1077 priv->cfg->base_params->pll_cfg_val);
1078
1079 /*
1080 * Set "initialization complete" bit to move adapter from
1081 * D0U* --> D0A* (powered-up active) state.
1082 */
1083 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1084
1085 /*
1086 * Wait for clock stabilization; once stabilized, access to
1087 * device-internal resources is supported, e.g. iwl_write_prph()
1088 * and accesses to uCode SRAM.
1089 */
1090 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1091 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1092 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1093 if (ret < 0) {
1094 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1095 goto out;
1096 }
1097
1098 /*
1099 * Enable DMA clock and wait for it to stabilize.
1100 *
1101 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1102 * do not disable clocks. This preserves any hardware bits already
1103 * set by default in "CLK_CTRL_REG" after reset.
1104 */
1105 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1106 udelay(20);
1107
1108 /* Disable L1-Active */
1109 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1110 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1111
1112 out:
1113 return ret;
1114 }
1115
1116
1117 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1118 {
1119 int ret;
1120 s8 prev_tx_power;
1121 bool defer;
1122 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1123
1124 lockdep_assert_held(&priv->mutex);
1125
1126 if (priv->tx_power_user_lmt == tx_power && !force)
1127 return 0;
1128
1129 if (!priv->cfg->ops->lib->send_tx_power)
1130 return -EOPNOTSUPP;
1131
1132 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1133 IWL_WARN(priv,
1134 "Requested user TXPOWER %d below lower limit %d.\n",
1135 tx_power,
1136 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1137 return -EINVAL;
1138 }
1139
1140 if (tx_power > priv->tx_power_device_lmt) {
1141 IWL_WARN(priv,
1142 "Requested user TXPOWER %d above upper limit %d.\n",
1143 tx_power, priv->tx_power_device_lmt);
1144 return -EINVAL;
1145 }
1146
1147 if (!iwl_is_ready_rf(priv))
1148 return -EIO;
1149
1150 /* scan complete and commit_rxon use tx_power_next value,
1151 * it always need to be updated for newest request */
1152 priv->tx_power_next = tx_power;
1153
1154 /* do not set tx power when scanning or channel changing */
1155 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1156 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1157 if (defer && !force) {
1158 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1159 return 0;
1160 }
1161
1162 prev_tx_power = priv->tx_power_user_lmt;
1163 priv->tx_power_user_lmt = tx_power;
1164
1165 ret = priv->cfg->ops->lib->send_tx_power(priv);
1166
1167 /* if fail to set tx_power, restore the orig. tx power */
1168 if (ret) {
1169 priv->tx_power_user_lmt = prev_tx_power;
1170 priv->tx_power_next = prev_tx_power;
1171 }
1172 return ret;
1173 }
1174
1175 void iwl_send_bt_config(struct iwl_priv *priv)
1176 {
1177 struct iwl_bt_cmd bt_cmd = {
1178 .lead_time = BT_LEAD_TIME_DEF,
1179 .max_kill = BT_MAX_KILL_DEF,
1180 .kill_ack_mask = 0,
1181 .kill_cts_mask = 0,
1182 };
1183
1184 if (!bt_coex_active)
1185 bt_cmd.flags = BT_COEX_DISABLE;
1186 else
1187 bt_cmd.flags = BT_COEX_ENABLE;
1188
1189 priv->bt_enable_flag = bt_cmd.flags;
1190 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1191 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1192
1193 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1194 sizeof(struct iwl_bt_cmd), &bt_cmd))
1195 IWL_ERR(priv, "failed to send BT Coex Config\n");
1196 }
1197
1198 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1199 {
1200 struct iwl_statistics_cmd statistics_cmd = {
1201 .configuration_flags =
1202 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1203 };
1204
1205 if (flags & CMD_ASYNC)
1206 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1207 sizeof(struct iwl_statistics_cmd),
1208 &statistics_cmd, NULL);
1209 else
1210 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1211 sizeof(struct iwl_statistics_cmd),
1212 &statistics_cmd);
1213 }
1214
1215 void iwl_clear_isr_stats(struct iwl_priv *priv)
1216 {
1217 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1218 }
1219
1220 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1221 const struct ieee80211_tx_queue_params *params)
1222 {
1223 struct iwl_priv *priv = hw->priv;
1224 struct iwl_rxon_context *ctx;
1225 unsigned long flags;
1226 int q;
1227
1228 IWL_DEBUG_MAC80211(priv, "enter\n");
1229
1230 if (!iwl_is_ready_rf(priv)) {
1231 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1232 return -EIO;
1233 }
1234
1235 if (queue >= AC_NUM) {
1236 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1237 return 0;
1238 }
1239
1240 q = AC_NUM - 1 - queue;
1241
1242 spin_lock_irqsave(&priv->lock, flags);
1243
1244 /*
1245 * MULTI-FIXME
1246 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1247 */
1248 for_each_context(priv, ctx) {
1249 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1250 cpu_to_le16(params->cw_min);
1251 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1252 cpu_to_le16(params->cw_max);
1253 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1254 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1255 cpu_to_le16((params->txop * 32));
1256
1257 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1258 }
1259
1260 spin_unlock_irqrestore(&priv->lock, flags);
1261
1262 IWL_DEBUG_MAC80211(priv, "leave\n");
1263 return 0;
1264 }
1265
1266 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1267 {
1268 struct iwl_priv *priv = hw->priv;
1269
1270 return priv->ibss_manager == IWL_IBSS_MANAGER;
1271 }
1272
1273 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1274 {
1275 iwl_connection_init_rx_config(priv, ctx);
1276
1277 if (priv->cfg->ops->hcmd->set_rxon_chain)
1278 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1279
1280 return iwlcore_commit_rxon(priv, ctx);
1281 }
1282
1283 static int iwl_setup_interface(struct iwl_priv *priv,
1284 struct iwl_rxon_context *ctx)
1285 {
1286 struct ieee80211_vif *vif = ctx->vif;
1287 int err;
1288
1289 lockdep_assert_held(&priv->mutex);
1290
1291 /*
1292 * This variable will be correct only when there's just
1293 * a single context, but all code using it is for hardware
1294 * that supports only one context.
1295 */
1296 priv->iw_mode = vif->type;
1297
1298 ctx->is_active = true;
1299
1300 err = iwl_set_mode(priv, ctx);
1301 if (err) {
1302 if (!ctx->always_active)
1303 ctx->is_active = false;
1304 return err;
1305 }
1306
1307 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1308 vif->type == NL80211_IFTYPE_ADHOC) {
1309 /*
1310 * pretend to have high BT traffic as long as we
1311 * are operating in IBSS mode, as this will cause
1312 * the rate scaling etc. to behave as intended.
1313 */
1314 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1315 }
1316
1317 return 0;
1318 }
1319
1320 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1321 {
1322 struct iwl_priv *priv = hw->priv;
1323 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1324 struct iwl_rxon_context *tmp, *ctx = NULL;
1325 int err;
1326 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1327
1328 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1329 viftype, vif->addr);
1330
1331 mutex_lock(&priv->mutex);
1332
1333 if (!iwl_is_ready_rf(priv)) {
1334 IWL_WARN(priv, "Try to add interface when device not ready\n");
1335 err = -EINVAL;
1336 goto out;
1337 }
1338
1339 for_each_context(priv, tmp) {
1340 u32 possible_modes =
1341 tmp->interface_modes | tmp->exclusive_interface_modes;
1342
1343 if (tmp->vif) {
1344 /* check if this busy context is exclusive */
1345 if (tmp->exclusive_interface_modes &
1346 BIT(tmp->vif->type)) {
1347 err = -EINVAL;
1348 goto out;
1349 }
1350 continue;
1351 }
1352
1353 if (!(possible_modes & BIT(viftype)))
1354 continue;
1355
1356 /* have maybe usable context w/o interface */
1357 ctx = tmp;
1358 break;
1359 }
1360
1361 if (!ctx) {
1362 err = -EOPNOTSUPP;
1363 goto out;
1364 }
1365
1366 vif_priv->ctx = ctx;
1367 ctx->vif = vif;
1368
1369 err = iwl_setup_interface(priv, ctx);
1370 if (!err)
1371 goto out;
1372
1373 ctx->vif = NULL;
1374 priv->iw_mode = NL80211_IFTYPE_STATION;
1375 out:
1376 mutex_unlock(&priv->mutex);
1377
1378 IWL_DEBUG_MAC80211(priv, "leave\n");
1379 return err;
1380 }
1381
1382 static void iwl_teardown_interface(struct iwl_priv *priv,
1383 struct ieee80211_vif *vif,
1384 bool mode_change)
1385 {
1386 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1387
1388 lockdep_assert_held(&priv->mutex);
1389
1390 if (priv->scan_vif == vif) {
1391 iwl_scan_cancel_timeout(priv, 200);
1392 iwl_force_scan_end(priv);
1393 }
1394
1395 if (!mode_change) {
1396 iwl_set_mode(priv, ctx);
1397 if (!ctx->always_active)
1398 ctx->is_active = false;
1399 }
1400
1401 /*
1402 * When removing the IBSS interface, overwrite the
1403 * BT traffic load with the stored one from the last
1404 * notification, if any. If this is a device that
1405 * doesn't implement this, this has no effect since
1406 * both values are the same and zero.
1407 */
1408 if (vif->type == NL80211_IFTYPE_ADHOC)
1409 priv->bt_traffic_load = priv->last_bt_traffic_load;
1410 }
1411
1412 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1413 struct ieee80211_vif *vif)
1414 {
1415 struct iwl_priv *priv = hw->priv;
1416 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1417
1418 IWL_DEBUG_MAC80211(priv, "enter\n");
1419
1420 mutex_lock(&priv->mutex);
1421
1422 WARN_ON(ctx->vif != vif);
1423 ctx->vif = NULL;
1424
1425 iwl_teardown_interface(priv, vif, false);
1426
1427 mutex_unlock(&priv->mutex);
1428
1429 IWL_DEBUG_MAC80211(priv, "leave\n");
1430
1431 }
1432
1433 int iwl_alloc_txq_mem(struct iwl_priv *priv)
1434 {
1435 if (!priv->txq)
1436 priv->txq = kzalloc(
1437 sizeof(struct iwl_tx_queue) *
1438 priv->cfg->base_params->num_of_queues,
1439 GFP_KERNEL);
1440 if (!priv->txq) {
1441 IWL_ERR(priv, "Not enough memory for txq\n");
1442 return -ENOMEM;
1443 }
1444 return 0;
1445 }
1446
1447 void iwl_free_txq_mem(struct iwl_priv *priv)
1448 {
1449 kfree(priv->txq);
1450 priv->txq = NULL;
1451 }
1452
1453 #ifdef CONFIG_IWLWIFI_DEBUGFS
1454
1455 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1456
1457 void iwl_reset_traffic_log(struct iwl_priv *priv)
1458 {
1459 priv->tx_traffic_idx = 0;
1460 priv->rx_traffic_idx = 0;
1461 if (priv->tx_traffic)
1462 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1463 if (priv->rx_traffic)
1464 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1465 }
1466
1467 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1468 {
1469 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1470
1471 if (iwl_debug_level & IWL_DL_TX) {
1472 if (!priv->tx_traffic) {
1473 priv->tx_traffic =
1474 kzalloc(traffic_size, GFP_KERNEL);
1475 if (!priv->tx_traffic)
1476 return -ENOMEM;
1477 }
1478 }
1479 if (iwl_debug_level & IWL_DL_RX) {
1480 if (!priv->rx_traffic) {
1481 priv->rx_traffic =
1482 kzalloc(traffic_size, GFP_KERNEL);
1483 if (!priv->rx_traffic)
1484 return -ENOMEM;
1485 }
1486 }
1487 iwl_reset_traffic_log(priv);
1488 return 0;
1489 }
1490
1491 void iwl_free_traffic_mem(struct iwl_priv *priv)
1492 {
1493 kfree(priv->tx_traffic);
1494 priv->tx_traffic = NULL;
1495
1496 kfree(priv->rx_traffic);
1497 priv->rx_traffic = NULL;
1498 }
1499
1500 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1501 u16 length, struct ieee80211_hdr *header)
1502 {
1503 __le16 fc;
1504 u16 len;
1505
1506 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1507 return;
1508
1509 if (!priv->tx_traffic)
1510 return;
1511
1512 fc = header->frame_control;
1513 if (ieee80211_is_data(fc)) {
1514 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1515 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1516 memcpy((priv->tx_traffic +
1517 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1518 header, len);
1519 priv->tx_traffic_idx =
1520 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1521 }
1522 }
1523
1524 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1525 u16 length, struct ieee80211_hdr *header)
1526 {
1527 __le16 fc;
1528 u16 len;
1529
1530 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1531 return;
1532
1533 if (!priv->rx_traffic)
1534 return;
1535
1536 fc = header->frame_control;
1537 if (ieee80211_is_data(fc)) {
1538 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1539 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1540 memcpy((priv->rx_traffic +
1541 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1542 header, len);
1543 priv->rx_traffic_idx =
1544 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1545 }
1546 }
1547
1548 const char *get_mgmt_string(int cmd)
1549 {
1550 switch (cmd) {
1551 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1552 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1553 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1554 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1555 IWL_CMD(MANAGEMENT_PROBE_REQ);
1556 IWL_CMD(MANAGEMENT_PROBE_RESP);
1557 IWL_CMD(MANAGEMENT_BEACON);
1558 IWL_CMD(MANAGEMENT_ATIM);
1559 IWL_CMD(MANAGEMENT_DISASSOC);
1560 IWL_CMD(MANAGEMENT_AUTH);
1561 IWL_CMD(MANAGEMENT_DEAUTH);
1562 IWL_CMD(MANAGEMENT_ACTION);
1563 default:
1564 return "UNKNOWN";
1565
1566 }
1567 }
1568
1569 const char *get_ctrl_string(int cmd)
1570 {
1571 switch (cmd) {
1572 IWL_CMD(CONTROL_BACK_REQ);
1573 IWL_CMD(CONTROL_BACK);
1574 IWL_CMD(CONTROL_PSPOLL);
1575 IWL_CMD(CONTROL_RTS);
1576 IWL_CMD(CONTROL_CTS);
1577 IWL_CMD(CONTROL_ACK);
1578 IWL_CMD(CONTROL_CFEND);
1579 IWL_CMD(CONTROL_CFENDACK);
1580 default:
1581 return "UNKNOWN";
1582
1583 }
1584 }
1585
1586 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1587 {
1588 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1589 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1590 }
1591
1592 /*
1593 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1594 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1595 * Use debugFs to display the rx/rx_statistics
1596 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1597 * information will be recorded, but DATA pkt still will be recorded
1598 * for the reason of iwl_led.c need to control the led blinking based on
1599 * number of tx and rx data.
1600 *
1601 */
1602 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1603 {
1604 struct traffic_stats *stats;
1605
1606 if (is_tx)
1607 stats = &priv->tx_stats;
1608 else
1609 stats = &priv->rx_stats;
1610
1611 if (ieee80211_is_mgmt(fc)) {
1612 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1613 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1614 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1615 break;
1616 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1617 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1618 break;
1619 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1620 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1621 break;
1622 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1623 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1624 break;
1625 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1626 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1627 break;
1628 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1629 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1630 break;
1631 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1632 stats->mgmt[MANAGEMENT_BEACON]++;
1633 break;
1634 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1635 stats->mgmt[MANAGEMENT_ATIM]++;
1636 break;
1637 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1638 stats->mgmt[MANAGEMENT_DISASSOC]++;
1639 break;
1640 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1641 stats->mgmt[MANAGEMENT_AUTH]++;
1642 break;
1643 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1644 stats->mgmt[MANAGEMENT_DEAUTH]++;
1645 break;
1646 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1647 stats->mgmt[MANAGEMENT_ACTION]++;
1648 break;
1649 }
1650 } else if (ieee80211_is_ctl(fc)) {
1651 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1652 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1653 stats->ctrl[CONTROL_BACK_REQ]++;
1654 break;
1655 case cpu_to_le16(IEEE80211_STYPE_BACK):
1656 stats->ctrl[CONTROL_BACK]++;
1657 break;
1658 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1659 stats->ctrl[CONTROL_PSPOLL]++;
1660 break;
1661 case cpu_to_le16(IEEE80211_STYPE_RTS):
1662 stats->ctrl[CONTROL_RTS]++;
1663 break;
1664 case cpu_to_le16(IEEE80211_STYPE_CTS):
1665 stats->ctrl[CONTROL_CTS]++;
1666 break;
1667 case cpu_to_le16(IEEE80211_STYPE_ACK):
1668 stats->ctrl[CONTROL_ACK]++;
1669 break;
1670 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1671 stats->ctrl[CONTROL_CFEND]++;
1672 break;
1673 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1674 stats->ctrl[CONTROL_CFENDACK]++;
1675 break;
1676 }
1677 } else {
1678 /* data */
1679 stats->data_cnt++;
1680 stats->data_bytes += len;
1681 }
1682 }
1683 #endif
1684
1685 static void iwl_force_rf_reset(struct iwl_priv *priv)
1686 {
1687 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1688 return;
1689
1690 if (!iwl_is_any_associated(priv)) {
1691 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1692 return;
1693 }
1694 /*
1695 * There is no easy and better way to force reset the radio,
1696 * the only known method is switching channel which will force to
1697 * reset and tune the radio.
1698 * Use internal short scan (single channel) operation to should
1699 * achieve this objective.
1700 * Driver should reset the radio when number of consecutive missed
1701 * beacon, or any other uCode error condition detected.
1702 */
1703 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1704 iwl_internal_short_hw_scan(priv);
1705 }
1706
1707
1708 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1709 {
1710 struct iwl_force_reset *force_reset;
1711
1712 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1713 return -EINVAL;
1714
1715 if (mode >= IWL_MAX_FORCE_RESET) {
1716 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1717 return -EINVAL;
1718 }
1719 force_reset = &priv->force_reset[mode];
1720 force_reset->reset_request_count++;
1721 if (!external) {
1722 if (force_reset->last_force_reset_jiffies &&
1723 time_after(force_reset->last_force_reset_jiffies +
1724 force_reset->reset_duration, jiffies)) {
1725 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1726 force_reset->reset_reject_count++;
1727 return -EAGAIN;
1728 }
1729 }
1730 force_reset->reset_success_count++;
1731 force_reset->last_force_reset_jiffies = jiffies;
1732 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1733 switch (mode) {
1734 case IWL_RF_RESET:
1735 iwl_force_rf_reset(priv);
1736 break;
1737 case IWL_FW_RESET:
1738 /*
1739 * if the request is from external(ex: debugfs),
1740 * then always perform the request in regardless the module
1741 * parameter setting
1742 * if the request is from internal (uCode error or driver
1743 * detect failure), then fw_restart module parameter
1744 * need to be check before performing firmware reload
1745 */
1746 if (!external && !priv->cfg->mod_params->restart_fw) {
1747 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1748 "module parameter setting\n");
1749 break;
1750 }
1751 IWL_ERR(priv, "On demand firmware reload\n");
1752 iwlagn_fw_error(priv, true);
1753 break;
1754 }
1755 return 0;
1756 }
1757
1758 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1759 enum nl80211_iftype newtype, bool newp2p)
1760 {
1761 struct iwl_priv *priv = hw->priv;
1762 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1763 struct iwl_rxon_context *tmp;
1764 u32 interface_modes;
1765 int err;
1766
1767 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1768
1769 mutex_lock(&priv->mutex);
1770
1771 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1772 /*
1773 * Huh? But wait ... this can maybe happen when
1774 * we're in the middle of a firmware restart!
1775 */
1776 err = -EBUSY;
1777 goto out;
1778 }
1779
1780 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1781
1782 if (!(interface_modes & BIT(newtype))) {
1783 err = -EBUSY;
1784 goto out;
1785 }
1786
1787 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1788 for_each_context(priv, tmp) {
1789 if (ctx == tmp)
1790 continue;
1791
1792 if (!tmp->vif)
1793 continue;
1794
1795 /*
1796 * The current mode switch would be exclusive, but
1797 * another context is active ... refuse the switch.
1798 */
1799 err = -EBUSY;
1800 goto out;
1801 }
1802 }
1803
1804 /* success */
1805 iwl_teardown_interface(priv, vif, true);
1806 vif->type = newtype;
1807 vif->p2p = newp2p;
1808 err = iwl_setup_interface(priv, ctx);
1809 WARN_ON(err);
1810 /*
1811 * We've switched internally, but submitting to the
1812 * device may have failed for some reason. Mask this
1813 * error, because otherwise mac80211 will not switch
1814 * (and set the interface type back) and we'll be
1815 * out of sync with it.
1816 */
1817 err = 0;
1818
1819 out:
1820 mutex_unlock(&priv->mutex);
1821 return err;
1822 }
1823
1824 /*
1825 * On every watchdog tick we check (latest) time stamp. If it does not
1826 * change during timeout period and queue is not empty we reset firmware.
1827 */
1828 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1829 {
1830 struct iwl_tx_queue *txq = &priv->txq[cnt];
1831 struct iwl_queue *q = &txq->q;
1832 unsigned long timeout;
1833 int ret;
1834
1835 if (q->read_ptr == q->write_ptr) {
1836 txq->time_stamp = jiffies;
1837 return 0;
1838 }
1839
1840 timeout = txq->time_stamp +
1841 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1842
1843 if (time_after(jiffies, timeout)) {
1844 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1845 q->id, priv->cfg->base_params->wd_timeout);
1846 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1847 return (ret == -EAGAIN) ? 0 : 1;
1848 }
1849
1850 return 0;
1851 }
1852
1853 /*
1854 * Making watchdog tick be a quarter of timeout assure we will
1855 * discover the queue hung between timeout and 1.25*timeout
1856 */
1857 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1858
1859 /*
1860 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1861 * we reset the firmware. If everything is fine just rearm the timer.
1862 */
1863 void iwl_bg_watchdog(unsigned long data)
1864 {
1865 struct iwl_priv *priv = (struct iwl_priv *)data;
1866 int cnt;
1867 unsigned long timeout;
1868
1869 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1870 return;
1871
1872 timeout = priv->cfg->base_params->wd_timeout;
1873 if (timeout == 0)
1874 return;
1875
1876 /* monitor and check for stuck cmd queue */
1877 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1878 return;
1879
1880 /* monitor and check for other stuck queues */
1881 if (iwl_is_any_associated(priv)) {
1882 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1883 /* skip as we already checked the command queue */
1884 if (cnt == priv->cmd_queue)
1885 continue;
1886 if (iwl_check_stuck_queue(priv, cnt))
1887 return;
1888 }
1889 }
1890
1891 mod_timer(&priv->watchdog, jiffies +
1892 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1893 }
1894
1895 void iwl_setup_watchdog(struct iwl_priv *priv)
1896 {
1897 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1898
1899 if (timeout)
1900 mod_timer(&priv->watchdog,
1901 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1902 else
1903 del_timer(&priv->watchdog);
1904 }
1905
1906 /*
1907 * extended beacon time format
1908 * time in usec will be changed into a 32-bit value in extended:internal format
1909 * the extended part is the beacon counts
1910 * the internal part is the time in usec within one beacon interval
1911 */
1912 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1913 {
1914 u32 quot;
1915 u32 rem;
1916 u32 interval = beacon_interval * TIME_UNIT;
1917
1918 if (!interval || !usec)
1919 return 0;
1920
1921 quot = (usec / interval) &
1922 (iwl_beacon_time_mask_high(priv,
1923 priv->hw_params.beacon_time_tsf_bits) >>
1924 priv->hw_params.beacon_time_tsf_bits);
1925 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1926 priv->hw_params.beacon_time_tsf_bits);
1927
1928 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1929 }
1930
1931 /* base is usually what we get from ucode with each received frame,
1932 * the same as HW timer counter counting down
1933 */
1934 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1935 u32 addon, u32 beacon_interval)
1936 {
1937 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1938 priv->hw_params.beacon_time_tsf_bits);
1939 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1940 priv->hw_params.beacon_time_tsf_bits);
1941 u32 interval = beacon_interval * TIME_UNIT;
1942 u32 res = (base & iwl_beacon_time_mask_high(priv,
1943 priv->hw_params.beacon_time_tsf_bits)) +
1944 (addon & iwl_beacon_time_mask_high(priv,
1945 priv->hw_params.beacon_time_tsf_bits));
1946
1947 if (base_low > addon_low)
1948 res += base_low - addon_low;
1949 else if (base_low < addon_low) {
1950 res += interval + base_low - addon_low;
1951 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1952 } else
1953 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1954
1955 return cpu_to_le32(res);
1956 }
1957
1958 #ifdef CONFIG_PM
1959
1960 int iwl_pci_suspend(struct device *device)
1961 {
1962 struct pci_dev *pdev = to_pci_dev(device);
1963 struct iwl_priv *priv = pci_get_drvdata(pdev);
1964
1965 /*
1966 * This function is called when system goes into suspend state
1967 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1968 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1969 * it will not call apm_ops.stop() to stop the DMA operation.
1970 * Calling apm_ops.stop here to make sure we stop the DMA.
1971 */
1972 iwl_apm_stop(priv);
1973
1974 return 0;
1975 }
1976
1977 int iwl_pci_resume(struct device *device)
1978 {
1979 struct pci_dev *pdev = to_pci_dev(device);
1980 struct iwl_priv *priv = pci_get_drvdata(pdev);
1981 bool hw_rfkill = false;
1982
1983 /*
1984 * We disable the RETRY_TIMEOUT register (0x41) to keep
1985 * PCI Tx retries from interfering with C3 CPU state.
1986 */
1987 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
1988
1989 iwl_enable_interrupts(priv);
1990
1991 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1992 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1993 hw_rfkill = true;
1994
1995 if (hw_rfkill)
1996 set_bit(STATUS_RF_KILL_HW, &priv->status);
1997 else
1998 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1999
2000 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2001
2002 return 0;
2003 }
2004
2005 const struct dev_pm_ops iwl_pm_ops = {
2006 .suspend = iwl_pci_suspend,
2007 .resume = iwl_pci_resume,
2008 .freeze = iwl_pci_suspend,
2009 .thaw = iwl_pci_resume,
2010 .poweroff = iwl_pci_suspend,
2011 .restore = iwl_pci_resume,
2012 };
2013
2014 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree