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iwlagn: remove un-necessary ieee80211_ops
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob885167f8168d7b23aa5993d88acdfdc96850e0b8
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
139 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
140 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
141 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
142 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
143 return 0;
144 }
145
146 channels = kzalloc(sizeof(struct ieee80211_channel) *
147 priv->channel_count, GFP_KERNEL);
148 if (!channels)
149 return -ENOMEM;
150
151 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
152 GFP_KERNEL);
153 if (!rates) {
154 kfree(channels);
155 return -ENOMEM;
156 }
157
158 /* 5.2GHz channels start after the 2.4GHz channels */
159 sband = &priv->bands[IEEE80211_BAND_5GHZ];
160 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
161 /* just OFDM */
162 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
163 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
164
165 if (priv->cfg->sku & IWL_SKU_N)
166 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
167 IEEE80211_BAND_5GHZ);
168
169 sband = &priv->bands[IEEE80211_BAND_2GHZ];
170 sband->channels = channels;
171 /* OFDM & CCK */
172 sband->bitrates = rates;
173 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
174
175 if (priv->cfg->sku & IWL_SKU_N)
176 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
177 IEEE80211_BAND_2GHZ);
178
179 priv->ieee_channels = channels;
180 priv->ieee_rates = rates;
181
182 for (i = 0; i < priv->channel_count; i++) {
183 ch = &priv->channel_info[i];
184
185 /* FIXME: might be removed if scan is OK */
186 if (!is_channel_valid(ch))
187 continue;
188
189 sband = &priv->bands[ch->band];
190
191 geo_ch = &sband->channels[sband->n_channels++];
192
193 geo_ch->center_freq =
194 ieee80211_channel_to_frequency(ch->channel, ch->band);
195 geo_ch->max_power = ch->max_power_avg;
196 geo_ch->max_antenna_gain = 0xff;
197 geo_ch->hw_value = ch->channel;
198
199 if (is_channel_valid(ch)) {
200 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
201 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
202
203 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
204 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
205
206 if (ch->flags & EEPROM_CHANNEL_RADAR)
207 geo_ch->flags |= IEEE80211_CHAN_RADAR;
208
209 geo_ch->flags |= ch->ht40_extension_channel;
210
211 if (ch->max_power_avg > priv->tx_power_device_lmt)
212 priv->tx_power_device_lmt = ch->max_power_avg;
213 } else {
214 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
215 }
216
217 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
218 ch->channel, geo_ch->center_freq,
219 is_channel_a_band(ch) ? "5.2" : "2.4",
220 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
221 "restricted" : "valid",
222 geo_ch->flags);
223 }
224
225 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
226 priv->cfg->sku & IWL_SKU_A) {
227 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
228 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
229 priv->pci_dev->device,
230 priv->pci_dev->subsystem_device);
231 priv->cfg->sku &= ~IWL_SKU_A;
232 }
233
234 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
235 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
236 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
237
238 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
239
240 return 0;
241 }
242
243 /*
244 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
245 */
246 void iwlcore_free_geos(struct iwl_priv *priv)
247 {
248 kfree(priv->ieee_channels);
249 kfree(priv->ieee_rates);
250 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
251 }
252
253 static bool iwl_is_channel_extension(struct iwl_priv *priv,
254 enum ieee80211_band band,
255 u16 channel, u8 extension_chan_offset)
256 {
257 const struct iwl_channel_info *ch_info;
258
259 ch_info = iwl_get_channel_info(priv, band, channel);
260 if (!is_channel_valid(ch_info))
261 return false;
262
263 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
264 return !(ch_info->ht40_extension_channel &
265 IEEE80211_CHAN_NO_HT40PLUS);
266 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
267 return !(ch_info->ht40_extension_channel &
268 IEEE80211_CHAN_NO_HT40MINUS);
269
270 return false;
271 }
272
273 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
274 struct iwl_rxon_context *ctx,
275 struct ieee80211_sta_ht_cap *ht_cap)
276 {
277 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
278 return false;
279
280 /*
281 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
282 * the bit will not set if it is pure 40MHz case
283 */
284 if (ht_cap && !ht_cap->ht_supported)
285 return false;
286
287 #ifdef CONFIG_IWLWIFI_DEBUGFS
288 if (priv->disable_ht40)
289 return false;
290 #endif
291
292 return iwl_is_channel_extension(priv, priv->band,
293 le16_to_cpu(ctx->staging.channel),
294 ctx->ht.extension_chan_offset);
295 }
296
297 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
298 {
299 u16 new_val;
300 u16 beacon_factor;
301
302 /*
303 * If mac80211 hasn't given us a beacon interval, program
304 * the default into the device (not checking this here
305 * would cause the adjustment below to return the maximum
306 * value, which may break PAN.)
307 */
308 if (!beacon_val)
309 return DEFAULT_BEACON_INTERVAL;
310
311 /*
312 * If the beacon interval we obtained from the peer
313 * is too large, we'll have to wake up more often
314 * (and in IBSS case, we'll beacon too much)
315 *
316 * For example, if max_beacon_val is 4096, and the
317 * requested beacon interval is 7000, we'll have to
318 * use 3500 to be able to wake up on the beacons.
319 *
320 * This could badly influence beacon detection stats.
321 */
322
323 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
324 new_val = beacon_val / beacon_factor;
325
326 if (!new_val)
327 new_val = max_beacon_val;
328
329 return new_val;
330 }
331
332 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
333 {
334 u64 tsf;
335 s32 interval_tm, rem;
336 struct ieee80211_conf *conf = NULL;
337 u16 beacon_int;
338 struct ieee80211_vif *vif = ctx->vif;
339
340 conf = ieee80211_get_hw_conf(priv->hw);
341
342 lockdep_assert_held(&priv->mutex);
343
344 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
345
346 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
347 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
348
349 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
350
351 /*
352 * TODO: For IBSS we need to get atim_window from mac80211,
353 * for now just always use 0
354 */
355 ctx->timing.atim_window = 0;
356
357 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
358 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
359 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
360 priv->contexts[IWL_RXON_CTX_BSS].vif &&
361 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
362 ctx->timing.beacon_interval =
363 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
364 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
365 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
366 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
367 priv->contexts[IWL_RXON_CTX_PAN].vif &&
368 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
369 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
370 !ctx->vif->bss_conf.beacon_int)) {
371 ctx->timing.beacon_interval =
372 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
373 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
374 } else {
375 beacon_int = iwl_adjust_beacon_interval(beacon_int,
376 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
377 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
378 }
379
380 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
381 interval_tm = beacon_int * TIME_UNIT;
382 rem = do_div(tsf, interval_tm);
383 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
384
385 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
386
387 IWL_DEBUG_ASSOC(priv,
388 "beacon interval %d beacon timer %d beacon tim %d\n",
389 le16_to_cpu(ctx->timing.beacon_interval),
390 le32_to_cpu(ctx->timing.beacon_init_val),
391 le16_to_cpu(ctx->timing.atim_window));
392
393 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
394 sizeof(ctx->timing), &ctx->timing);
395 }
396
397 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
398 int hw_decrypt)
399 {
400 struct iwl_rxon_cmd *rxon = &ctx->staging;
401
402 if (hw_decrypt)
403 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
404 else
405 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
406
407 }
408
409 /* validate RXON structure is valid */
410 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
411 {
412 struct iwl_rxon_cmd *rxon = &ctx->staging;
413 bool error = false;
414
415 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
416 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
417 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
418 error = true;
419 }
420 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
421 IWL_WARN(priv, "check 2.4G: wrong radar\n");
422 error = true;
423 }
424 } else {
425 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
426 IWL_WARN(priv, "check 5.2G: not short slot!\n");
427 error = true;
428 }
429 if (rxon->flags & RXON_FLG_CCK_MSK) {
430 IWL_WARN(priv, "check 5.2G: CCK!\n");
431 error = true;
432 }
433 }
434 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
435 IWL_WARN(priv, "mac/bssid mcast!\n");
436 error = true;
437 }
438
439 /* make sure basic rates 6Mbps and 1Mbps are supported */
440 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
441 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
442 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
443 error = true;
444 }
445
446 if (le16_to_cpu(rxon->assoc_id) > 2007) {
447 IWL_WARN(priv, "aid > 2007\n");
448 error = true;
449 }
450
451 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
452 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
453 IWL_WARN(priv, "CCK and short slot\n");
454 error = true;
455 }
456
457 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
458 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
459 IWL_WARN(priv, "CCK and auto detect");
460 error = true;
461 }
462
463 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
464 RXON_FLG_TGG_PROTECT_MSK)) ==
465 RXON_FLG_TGG_PROTECT_MSK) {
466 IWL_WARN(priv, "TGg but no auto-detect\n");
467 error = true;
468 }
469
470 if (error)
471 IWL_WARN(priv, "Tuning to channel %d\n",
472 le16_to_cpu(rxon->channel));
473
474 if (error) {
475 IWL_ERR(priv, "Invalid RXON\n");
476 return -EINVAL;
477 }
478 return 0;
479 }
480
481 /**
482 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
483 * @priv: staging_rxon is compared to active_rxon
484 *
485 * If the RXON structure is changing enough to require a new tune,
486 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
487 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
488 */
489 int iwl_full_rxon_required(struct iwl_priv *priv,
490 struct iwl_rxon_context *ctx)
491 {
492 const struct iwl_rxon_cmd *staging = &ctx->staging;
493 const struct iwl_rxon_cmd *active = &ctx->active;
494
495 #define CHK(cond) \
496 if ((cond)) { \
497 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
498 return 1; \
499 }
500
501 #define CHK_NEQ(c1, c2) \
502 if ((c1) != (c2)) { \
503 IWL_DEBUG_INFO(priv, "need full RXON - " \
504 #c1 " != " #c2 " - %d != %d\n", \
505 (c1), (c2)); \
506 return 1; \
507 }
508
509 /* These items are only settable from the full RXON command */
510 CHK(!iwl_is_associated_ctx(ctx));
511 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
512 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
513 CHK(compare_ether_addr(staging->wlap_bssid_addr,
514 active->wlap_bssid_addr));
515 CHK_NEQ(staging->dev_type, active->dev_type);
516 CHK_NEQ(staging->channel, active->channel);
517 CHK_NEQ(staging->air_propagation, active->air_propagation);
518 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
519 active->ofdm_ht_single_stream_basic_rates);
520 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
521 active->ofdm_ht_dual_stream_basic_rates);
522 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
523 active->ofdm_ht_triple_stream_basic_rates);
524 CHK_NEQ(staging->assoc_id, active->assoc_id);
525
526 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
527 * be updated with the RXON_ASSOC command -- however only some
528 * flag transitions are allowed using RXON_ASSOC */
529
530 /* Check if we are not switching bands */
531 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
532 active->flags & RXON_FLG_BAND_24G_MSK);
533
534 /* Check if we are switching association toggle */
535 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
536 active->filter_flags & RXON_FILTER_ASSOC_MSK);
537
538 #undef CHK
539 #undef CHK_NEQ
540
541 return 0;
542 }
543
544 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
545 struct iwl_rxon_context *ctx)
546 {
547 /*
548 * Assign the lowest rate -- should really get this from
549 * the beacon skb from mac80211.
550 */
551 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
552 return IWL_RATE_1M_PLCP;
553 else
554 return IWL_RATE_6M_PLCP;
555 }
556
557 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
558 struct iwl_ht_config *ht_conf,
559 struct iwl_rxon_context *ctx)
560 {
561 struct iwl_rxon_cmd *rxon = &ctx->staging;
562
563 if (!ctx->ht.enabled) {
564 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
565 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
566 RXON_FLG_HT40_PROT_MSK |
567 RXON_FLG_HT_PROT_MSK);
568 return;
569 }
570
571 /* FIXME: if the definition of ht.protection changed, the "translation"
572 * will be needed for rxon->flags
573 */
574 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
575
576 /* Set up channel bandwidth:
577 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
578 /* clear the HT channel mode before set the mode */
579 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
580 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
581 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
582 /* pure ht40 */
583 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
584 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
585 /* Note: control channel is opposite of extension channel */
586 switch (ctx->ht.extension_chan_offset) {
587 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
588 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
589 break;
590 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
591 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
592 break;
593 }
594 } else {
595 /* Note: control channel is opposite of extension channel */
596 switch (ctx->ht.extension_chan_offset) {
597 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
598 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
599 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
600 break;
601 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
602 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
603 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
604 break;
605 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
606 default:
607 /* channel location only valid if in Mixed mode */
608 IWL_ERR(priv, "invalid extension channel offset\n");
609 break;
610 }
611 }
612 } else {
613 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
614 }
615
616 if (priv->cfg->ops->hcmd->set_rxon_chain)
617 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
618
619 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
620 "extension channel offset 0x%x\n",
621 le32_to_cpu(rxon->flags), ctx->ht.protection,
622 ctx->ht.extension_chan_offset);
623 }
624
625 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
626 {
627 struct iwl_rxon_context *ctx;
628
629 for_each_context(priv, ctx)
630 _iwl_set_rxon_ht(priv, ht_conf, ctx);
631 }
632
633 /* Return valid, unused, channel for a passive scan to reset the RF */
634 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
635 enum ieee80211_band band)
636 {
637 const struct iwl_channel_info *ch_info;
638 int i;
639 u8 channel = 0;
640 u8 min, max;
641 struct iwl_rxon_context *ctx;
642
643 if (band == IEEE80211_BAND_5GHZ) {
644 min = 14;
645 max = priv->channel_count;
646 } else {
647 min = 0;
648 max = 14;
649 }
650
651 for (i = min; i < max; i++) {
652 bool busy = false;
653
654 for_each_context(priv, ctx) {
655 busy = priv->channel_info[i].channel ==
656 le16_to_cpu(ctx->staging.channel);
657 if (busy)
658 break;
659 }
660
661 if (busy)
662 continue;
663
664 channel = priv->channel_info[i].channel;
665 ch_info = iwl_get_channel_info(priv, band, channel);
666 if (is_channel_valid(ch_info))
667 break;
668 }
669
670 return channel;
671 }
672
673 /**
674 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
675 * @ch: requested channel as a pointer to struct ieee80211_channel
676
677 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
678 * in the staging RXON flag structure based on the ch->band
679 */
680 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
681 struct iwl_rxon_context *ctx)
682 {
683 enum ieee80211_band band = ch->band;
684 u16 channel = ch->hw_value;
685
686 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
687 (priv->band == band))
688 return 0;
689
690 ctx->staging.channel = cpu_to_le16(channel);
691 if (band == IEEE80211_BAND_5GHZ)
692 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
693 else
694 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
695
696 priv->band = band;
697
698 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
699
700 return 0;
701 }
702
703 void iwl_set_flags_for_band(struct iwl_priv *priv,
704 struct iwl_rxon_context *ctx,
705 enum ieee80211_band band,
706 struct ieee80211_vif *vif)
707 {
708 if (band == IEEE80211_BAND_5GHZ) {
709 ctx->staging.flags &=
710 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
711 | RXON_FLG_CCK_MSK);
712 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
713 } else {
714 /* Copied from iwl_post_associate() */
715 if (vif && vif->bss_conf.use_short_slot)
716 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
717 else
718 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
719
720 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
721 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
722 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
723 }
724 }
725
726 /*
727 * initialize rxon structure with default values from eeprom
728 */
729 void iwl_connection_init_rx_config(struct iwl_priv *priv,
730 struct iwl_rxon_context *ctx)
731 {
732 const struct iwl_channel_info *ch_info;
733
734 memset(&ctx->staging, 0, sizeof(ctx->staging));
735
736 if (!ctx->vif) {
737 ctx->staging.dev_type = ctx->unused_devtype;
738 } else switch (ctx->vif->type) {
739 case NL80211_IFTYPE_AP:
740 ctx->staging.dev_type = ctx->ap_devtype;
741 break;
742
743 case NL80211_IFTYPE_STATION:
744 ctx->staging.dev_type = ctx->station_devtype;
745 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
746 break;
747
748 case NL80211_IFTYPE_ADHOC:
749 ctx->staging.dev_type = ctx->ibss_devtype;
750 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
751 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
752 RXON_FILTER_ACCEPT_GRP_MSK;
753 break;
754
755 default:
756 IWL_ERR(priv, "Unsupported interface type %d\n",
757 ctx->vif->type);
758 break;
759 }
760
761 #if 0
762 /* TODO: Figure out when short_preamble would be set and cache from
763 * that */
764 if (!hw_to_local(priv->hw)->short_preamble)
765 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
766 else
767 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
768 #endif
769
770 ch_info = iwl_get_channel_info(priv, priv->band,
771 le16_to_cpu(ctx->active.channel));
772
773 if (!ch_info)
774 ch_info = &priv->channel_info[0];
775
776 ctx->staging.channel = cpu_to_le16(ch_info->channel);
777 priv->band = ch_info->band;
778
779 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
780
781 ctx->staging.ofdm_basic_rates =
782 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
783 ctx->staging.cck_basic_rates =
784 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
785
786 /* clear both MIX and PURE40 mode flag */
787 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
788 RXON_FLG_CHANNEL_MODE_PURE_40);
789 if (ctx->vif)
790 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
791
792 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
793 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
794 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
795 }
796
797 void iwl_set_rate(struct iwl_priv *priv)
798 {
799 const struct ieee80211_supported_band *hw = NULL;
800 struct ieee80211_rate *rate;
801 struct iwl_rxon_context *ctx;
802 int i;
803
804 hw = iwl_get_hw_mode(priv, priv->band);
805 if (!hw) {
806 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
807 return;
808 }
809
810 priv->active_rate = 0;
811
812 for (i = 0; i < hw->n_bitrates; i++) {
813 rate = &(hw->bitrates[i]);
814 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
815 priv->active_rate |= (1 << rate->hw_value);
816 }
817
818 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
819
820 for_each_context(priv, ctx) {
821 ctx->staging.cck_basic_rates =
822 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
823
824 ctx->staging.ofdm_basic_rates =
825 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
826 }
827 }
828
829 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
830 {
831 /*
832 * MULTI-FIXME
833 * See iwl_mac_channel_switch.
834 */
835 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
836
837 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
838 return;
839
840 if (priv->switch_rxon.switch_in_progress) {
841 ieee80211_chswitch_done(ctx->vif, is_success);
842 mutex_lock(&priv->mutex);
843 priv->switch_rxon.switch_in_progress = false;
844 mutex_unlock(&priv->mutex);
845 }
846 }
847
848 #ifdef CONFIG_IWLWIFI_DEBUG
849 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
850 struct iwl_rxon_context *ctx)
851 {
852 struct iwl_rxon_cmd *rxon = &ctx->staging;
853
854 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
855 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
856 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
857 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
858 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
859 le32_to_cpu(rxon->filter_flags));
860 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
861 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
862 rxon->ofdm_basic_rates);
863 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
864 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
865 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
866 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
867 }
868 #endif
869
870 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
871 {
872 unsigned int reload_msec;
873 unsigned long reload_jiffies;
874
875 /* Set the FW error flag -- cleared on iwl_down */
876 set_bit(STATUS_FW_ERROR, &priv->status);
877
878 /* Cancel currently queued command. */
879 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
880
881 /* Keep the restart process from trying to send host
882 * commands by clearing the ready bit */
883 clear_bit(STATUS_READY, &priv->status);
884
885 wake_up_interruptible(&priv->wait_command_queue);
886
887 if (!ondemand) {
888 /*
889 * If firmware keep reloading, then it indicate something
890 * serious wrong and firmware having problem to recover
891 * from it. Instead of keep trying which will fill the syslog
892 * and hang the system, let's just stop it
893 */
894 reload_jiffies = jiffies;
895 reload_msec = jiffies_to_msecs((long) reload_jiffies -
896 (long) priv->reload_jiffies);
897 priv->reload_jiffies = reload_jiffies;
898 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
899 priv->reload_count++;
900 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
901 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
902 return;
903 }
904 } else
905 priv->reload_count = 0;
906 }
907
908 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
909 if (priv->cfg->mod_params->restart_fw) {
910 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
911 "Restarting adapter due to uCode error.\n");
912 queue_work(priv->workqueue, &priv->restart);
913 } else
914 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
915 "Detected FW error, but not restarting\n");
916 }
917 }
918
919 /**
920 * iwl_irq_handle_error - called for HW or SW error interrupt from card
921 */
922 void iwl_irq_handle_error(struct iwl_priv *priv)
923 {
924 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
925 if (priv->cfg->internal_wimax_coex &&
926 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
927 APMS_CLK_VAL_MRB_FUNC_MODE) ||
928 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
929 APMG_PS_CTRL_VAL_RESET_REQ))) {
930 /*
931 * Keep the restart process from trying to send host
932 * commands by clearing the ready bit.
933 */
934 clear_bit(STATUS_READY, &priv->status);
935 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
936 wake_up_interruptible(&priv->wait_command_queue);
937 IWL_ERR(priv, "RF is used by WiMAX\n");
938 return;
939 }
940
941 IWL_ERR(priv, "Loaded firmware version: %s\n",
942 priv->hw->wiphy->fw_version);
943
944 iwl_dump_nic_error_log(priv);
945 iwl_dump_csr(priv);
946 iwl_dump_fh(priv, NULL, false);
947 iwl_dump_nic_event_log(priv, false, NULL, false);
948 #ifdef CONFIG_IWLWIFI_DEBUG
949 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
950 iwl_print_rx_config_cmd(priv,
951 &priv->contexts[IWL_RXON_CTX_BSS]);
952 #endif
953
954 iwlagn_fw_error(priv, false);
955 }
956
957 static int iwl_apm_stop_master(struct iwl_priv *priv)
958 {
959 int ret = 0;
960
961 /* stop device's busmaster DMA activity */
962 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
963
964 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
965 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
966 if (ret)
967 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
968
969 IWL_DEBUG_INFO(priv, "stop master\n");
970
971 return ret;
972 }
973
974 void iwl_apm_stop(struct iwl_priv *priv)
975 {
976 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
977
978 /* Stop device's DMA activity */
979 iwl_apm_stop_master(priv);
980
981 /* Reset the entire device */
982 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
983
984 udelay(10);
985
986 /*
987 * Clear "initialization complete" bit to move adapter from
988 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
989 */
990 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
991 }
992
993
994 /*
995 * Start up NIC's basic functionality after it has been reset
996 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
997 * NOTE: This does not load uCode nor start the embedded processor
998 */
999 int iwl_apm_init(struct iwl_priv *priv)
1000 {
1001 int ret = 0;
1002 u16 lctl;
1003
1004 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1005
1006 /*
1007 * Use "set_bit" below rather than "write", to preserve any hardware
1008 * bits already set by default after reset.
1009 */
1010
1011 /* Disable L0S exit timer (platform NMI Work/Around) */
1012 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1013 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1014
1015 /*
1016 * Disable L0s without affecting L1;
1017 * don't wait for ICH L0s (ICH bug W/A)
1018 */
1019 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1020 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1021
1022 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1023 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1024
1025 /*
1026 * Enable HAP INTA (interrupt from management bus) to
1027 * wake device's PCI Express link L1a -> L0s
1028 */
1029 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1030 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1031
1032 /*
1033 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1034 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1035 * If so (likely), disable L0S, so device moves directly L0->L1;
1036 * costs negligible amount of power savings.
1037 * If not (unlikely), enable L0S, so there is at least some
1038 * power savings, even without L1.
1039 */
1040 lctl = iwl_pcie_link_ctl(priv);
1041 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1042 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1043 /* L1-ASPM enabled; disable(!) L0S */
1044 iwl_set_bit(priv, CSR_GIO_REG,
1045 CSR_GIO_REG_VAL_L0S_ENABLED);
1046 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1047 } else {
1048 /* L1-ASPM disabled; enable(!) L0S */
1049 iwl_clear_bit(priv, CSR_GIO_REG,
1050 CSR_GIO_REG_VAL_L0S_ENABLED);
1051 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1052 }
1053
1054 /* Configure analog phase-lock-loop before activating to D0A */
1055 if (priv->cfg->base_params->pll_cfg_val)
1056 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1057 priv->cfg->base_params->pll_cfg_val);
1058
1059 /*
1060 * Set "initialization complete" bit to move adapter from
1061 * D0U* --> D0A* (powered-up active) state.
1062 */
1063 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1064
1065 /*
1066 * Wait for clock stabilization; once stabilized, access to
1067 * device-internal resources is supported, e.g. iwl_write_prph()
1068 * and accesses to uCode SRAM.
1069 */
1070 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1071 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1072 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1073 if (ret < 0) {
1074 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1075 goto out;
1076 }
1077
1078 /*
1079 * Enable DMA clock and wait for it to stabilize.
1080 *
1081 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1082 * do not disable clocks. This preserves any hardware bits already
1083 * set by default in "CLK_CTRL_REG" after reset.
1084 */
1085 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1086 udelay(20);
1087
1088 /* Disable L1-Active */
1089 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1090 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1091
1092 out:
1093 return ret;
1094 }
1095
1096
1097 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1098 {
1099 int ret;
1100 s8 prev_tx_power;
1101 bool defer;
1102 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1103
1104 lockdep_assert_held(&priv->mutex);
1105
1106 if (priv->tx_power_user_lmt == tx_power && !force)
1107 return 0;
1108
1109 if (!priv->cfg->ops->lib->send_tx_power)
1110 return -EOPNOTSUPP;
1111
1112 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1113 IWL_WARN(priv,
1114 "Requested user TXPOWER %d below lower limit %d.\n",
1115 tx_power,
1116 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1117 return -EINVAL;
1118 }
1119
1120 if (tx_power > priv->tx_power_device_lmt) {
1121 IWL_WARN(priv,
1122 "Requested user TXPOWER %d above upper limit %d.\n",
1123 tx_power, priv->tx_power_device_lmt);
1124 return -EINVAL;
1125 }
1126
1127 if (!iwl_is_ready_rf(priv))
1128 return -EIO;
1129
1130 /* scan complete and commit_rxon use tx_power_next value,
1131 * it always need to be updated for newest request */
1132 priv->tx_power_next = tx_power;
1133
1134 /* do not set tx power when scanning or channel changing */
1135 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1136 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1137 if (defer && !force) {
1138 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1139 return 0;
1140 }
1141
1142 prev_tx_power = priv->tx_power_user_lmt;
1143 priv->tx_power_user_lmt = tx_power;
1144
1145 ret = priv->cfg->ops->lib->send_tx_power(priv);
1146
1147 /* if fail to set tx_power, restore the orig. tx power */
1148 if (ret) {
1149 priv->tx_power_user_lmt = prev_tx_power;
1150 priv->tx_power_next = prev_tx_power;
1151 }
1152 return ret;
1153 }
1154
1155 void iwl_send_bt_config(struct iwl_priv *priv)
1156 {
1157 struct iwl_bt_cmd bt_cmd = {
1158 .lead_time = BT_LEAD_TIME_DEF,
1159 .max_kill = BT_MAX_KILL_DEF,
1160 .kill_ack_mask = 0,
1161 .kill_cts_mask = 0,
1162 };
1163
1164 if (!bt_coex_active)
1165 bt_cmd.flags = BT_COEX_DISABLE;
1166 else
1167 bt_cmd.flags = BT_COEX_ENABLE;
1168
1169 priv->bt_enable_flag = bt_cmd.flags;
1170 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1171 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1172
1173 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1174 sizeof(struct iwl_bt_cmd), &bt_cmd))
1175 IWL_ERR(priv, "failed to send BT Coex Config\n");
1176 }
1177
1178 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1179 {
1180 struct iwl_statistics_cmd statistics_cmd = {
1181 .configuration_flags =
1182 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1183 };
1184
1185 if (flags & CMD_ASYNC)
1186 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1187 sizeof(struct iwl_statistics_cmd),
1188 &statistics_cmd, NULL);
1189 else
1190 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1191 sizeof(struct iwl_statistics_cmd),
1192 &statistics_cmd);
1193 }
1194
1195 void iwl_clear_isr_stats(struct iwl_priv *priv)
1196 {
1197 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1198 }
1199
1200 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1201 const struct ieee80211_tx_queue_params *params)
1202 {
1203 struct iwl_priv *priv = hw->priv;
1204 struct iwl_rxon_context *ctx;
1205 unsigned long flags;
1206 int q;
1207
1208 IWL_DEBUG_MAC80211(priv, "enter\n");
1209
1210 if (!iwl_is_ready_rf(priv)) {
1211 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1212 return -EIO;
1213 }
1214
1215 if (queue >= AC_NUM) {
1216 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1217 return 0;
1218 }
1219
1220 q = AC_NUM - 1 - queue;
1221
1222 spin_lock_irqsave(&priv->lock, flags);
1223
1224 /*
1225 * MULTI-FIXME
1226 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1227 */
1228 for_each_context(priv, ctx) {
1229 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1230 cpu_to_le16(params->cw_min);
1231 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1232 cpu_to_le16(params->cw_max);
1233 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1234 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1235 cpu_to_le16((params->txop * 32));
1236
1237 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1238 }
1239
1240 spin_unlock_irqrestore(&priv->lock, flags);
1241
1242 IWL_DEBUG_MAC80211(priv, "leave\n");
1243 return 0;
1244 }
1245
1246 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1247 {
1248 struct iwl_priv *priv = hw->priv;
1249
1250 return priv->ibss_manager == IWL_IBSS_MANAGER;
1251 }
1252
1253 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1254 {
1255 iwl_connection_init_rx_config(priv, ctx);
1256
1257 if (priv->cfg->ops->hcmd->set_rxon_chain)
1258 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1259
1260 return iwlcore_commit_rxon(priv, ctx);
1261 }
1262
1263 static int iwl_setup_interface(struct iwl_priv *priv,
1264 struct iwl_rxon_context *ctx)
1265 {
1266 struct ieee80211_vif *vif = ctx->vif;
1267 int err;
1268
1269 lockdep_assert_held(&priv->mutex);
1270
1271 /*
1272 * This variable will be correct only when there's just
1273 * a single context, but all code using it is for hardware
1274 * that supports only one context.
1275 */
1276 priv->iw_mode = vif->type;
1277
1278 ctx->is_active = true;
1279
1280 err = iwl_set_mode(priv, ctx);
1281 if (err) {
1282 if (!ctx->always_active)
1283 ctx->is_active = false;
1284 return err;
1285 }
1286
1287 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1288 vif->type == NL80211_IFTYPE_ADHOC) {
1289 /*
1290 * pretend to have high BT traffic as long as we
1291 * are operating in IBSS mode, as this will cause
1292 * the rate scaling etc. to behave as intended.
1293 */
1294 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1295 }
1296
1297 return 0;
1298 }
1299
1300 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1301 {
1302 struct iwl_priv *priv = hw->priv;
1303 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1304 struct iwl_rxon_context *tmp, *ctx = NULL;
1305 int err;
1306 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1307
1308 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1309 viftype, vif->addr);
1310
1311 mutex_lock(&priv->mutex);
1312
1313 if (!iwl_is_ready_rf(priv)) {
1314 IWL_WARN(priv, "Try to add interface when device not ready\n");
1315 err = -EINVAL;
1316 goto out;
1317 }
1318
1319 for_each_context(priv, tmp) {
1320 u32 possible_modes =
1321 tmp->interface_modes | tmp->exclusive_interface_modes;
1322
1323 if (tmp->vif) {
1324 /* check if this busy context is exclusive */
1325 if (tmp->exclusive_interface_modes &
1326 BIT(tmp->vif->type)) {
1327 err = -EINVAL;
1328 goto out;
1329 }
1330 continue;
1331 }
1332
1333 if (!(possible_modes & BIT(viftype)))
1334 continue;
1335
1336 /* have maybe usable context w/o interface */
1337 ctx = tmp;
1338 break;
1339 }
1340
1341 if (!ctx) {
1342 err = -EOPNOTSUPP;
1343 goto out;
1344 }
1345
1346 vif_priv->ctx = ctx;
1347 ctx->vif = vif;
1348
1349 err = iwl_setup_interface(priv, ctx);
1350 if (!err)
1351 goto out;
1352
1353 ctx->vif = NULL;
1354 priv->iw_mode = NL80211_IFTYPE_STATION;
1355 out:
1356 mutex_unlock(&priv->mutex);
1357
1358 IWL_DEBUG_MAC80211(priv, "leave\n");
1359 return err;
1360 }
1361
1362 static void iwl_teardown_interface(struct iwl_priv *priv,
1363 struct ieee80211_vif *vif,
1364 bool mode_change)
1365 {
1366 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1367
1368 lockdep_assert_held(&priv->mutex);
1369
1370 if (priv->scan_vif == vif) {
1371 iwl_scan_cancel_timeout(priv, 200);
1372 iwl_force_scan_end(priv);
1373 }
1374
1375 if (!mode_change) {
1376 iwl_set_mode(priv, ctx);
1377 if (!ctx->always_active)
1378 ctx->is_active = false;
1379 }
1380
1381 /*
1382 * When removing the IBSS interface, overwrite the
1383 * BT traffic load with the stored one from the last
1384 * notification, if any. If this is a device that
1385 * doesn't implement this, this has no effect since
1386 * both values are the same and zero.
1387 */
1388 if (vif->type == NL80211_IFTYPE_ADHOC)
1389 priv->bt_traffic_load = priv->last_bt_traffic_load;
1390 }
1391
1392 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1393 struct ieee80211_vif *vif)
1394 {
1395 struct iwl_priv *priv = hw->priv;
1396 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1397
1398 IWL_DEBUG_MAC80211(priv, "enter\n");
1399
1400 mutex_lock(&priv->mutex);
1401
1402 WARN_ON(ctx->vif != vif);
1403 ctx->vif = NULL;
1404
1405 iwl_teardown_interface(priv, vif, false);
1406
1407 mutex_unlock(&priv->mutex);
1408
1409 IWL_DEBUG_MAC80211(priv, "leave\n");
1410
1411 }
1412
1413 int iwl_alloc_txq_mem(struct iwl_priv *priv)
1414 {
1415 if (!priv->txq)
1416 priv->txq = kzalloc(
1417 sizeof(struct iwl_tx_queue) *
1418 priv->cfg->base_params->num_of_queues,
1419 GFP_KERNEL);
1420 if (!priv->txq) {
1421 IWL_ERR(priv, "Not enough memory for txq\n");
1422 return -ENOMEM;
1423 }
1424 return 0;
1425 }
1426
1427 void iwl_free_txq_mem(struct iwl_priv *priv)
1428 {
1429 kfree(priv->txq);
1430 priv->txq = NULL;
1431 }
1432
1433 #ifdef CONFIG_IWLWIFI_DEBUGFS
1434
1435 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1436
1437 void iwl_reset_traffic_log(struct iwl_priv *priv)
1438 {
1439 priv->tx_traffic_idx = 0;
1440 priv->rx_traffic_idx = 0;
1441 if (priv->tx_traffic)
1442 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1443 if (priv->rx_traffic)
1444 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1445 }
1446
1447 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1448 {
1449 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1450
1451 if (iwl_debug_level & IWL_DL_TX) {
1452 if (!priv->tx_traffic) {
1453 priv->tx_traffic =
1454 kzalloc(traffic_size, GFP_KERNEL);
1455 if (!priv->tx_traffic)
1456 return -ENOMEM;
1457 }
1458 }
1459 if (iwl_debug_level & IWL_DL_RX) {
1460 if (!priv->rx_traffic) {
1461 priv->rx_traffic =
1462 kzalloc(traffic_size, GFP_KERNEL);
1463 if (!priv->rx_traffic)
1464 return -ENOMEM;
1465 }
1466 }
1467 iwl_reset_traffic_log(priv);
1468 return 0;
1469 }
1470
1471 void iwl_free_traffic_mem(struct iwl_priv *priv)
1472 {
1473 kfree(priv->tx_traffic);
1474 priv->tx_traffic = NULL;
1475
1476 kfree(priv->rx_traffic);
1477 priv->rx_traffic = NULL;
1478 }
1479
1480 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1481 u16 length, struct ieee80211_hdr *header)
1482 {
1483 __le16 fc;
1484 u16 len;
1485
1486 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1487 return;
1488
1489 if (!priv->tx_traffic)
1490 return;
1491
1492 fc = header->frame_control;
1493 if (ieee80211_is_data(fc)) {
1494 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1495 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1496 memcpy((priv->tx_traffic +
1497 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1498 header, len);
1499 priv->tx_traffic_idx =
1500 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1501 }
1502 }
1503
1504 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1505 u16 length, struct ieee80211_hdr *header)
1506 {
1507 __le16 fc;
1508 u16 len;
1509
1510 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1511 return;
1512
1513 if (!priv->rx_traffic)
1514 return;
1515
1516 fc = header->frame_control;
1517 if (ieee80211_is_data(fc)) {
1518 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1519 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1520 memcpy((priv->rx_traffic +
1521 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1522 header, len);
1523 priv->rx_traffic_idx =
1524 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1525 }
1526 }
1527
1528 const char *get_mgmt_string(int cmd)
1529 {
1530 switch (cmd) {
1531 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1532 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1533 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1534 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1535 IWL_CMD(MANAGEMENT_PROBE_REQ);
1536 IWL_CMD(MANAGEMENT_PROBE_RESP);
1537 IWL_CMD(MANAGEMENT_BEACON);
1538 IWL_CMD(MANAGEMENT_ATIM);
1539 IWL_CMD(MANAGEMENT_DISASSOC);
1540 IWL_CMD(MANAGEMENT_AUTH);
1541 IWL_CMD(MANAGEMENT_DEAUTH);
1542 IWL_CMD(MANAGEMENT_ACTION);
1543 default:
1544 return "UNKNOWN";
1545
1546 }
1547 }
1548
1549 const char *get_ctrl_string(int cmd)
1550 {
1551 switch (cmd) {
1552 IWL_CMD(CONTROL_BACK_REQ);
1553 IWL_CMD(CONTROL_BACK);
1554 IWL_CMD(CONTROL_PSPOLL);
1555 IWL_CMD(CONTROL_RTS);
1556 IWL_CMD(CONTROL_CTS);
1557 IWL_CMD(CONTROL_ACK);
1558 IWL_CMD(CONTROL_CFEND);
1559 IWL_CMD(CONTROL_CFENDACK);
1560 default:
1561 return "UNKNOWN";
1562
1563 }
1564 }
1565
1566 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1567 {
1568 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1569 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1570 }
1571
1572 /*
1573 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1574 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1575 * Use debugFs to display the rx/rx_statistics
1576 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1577 * information will be recorded, but DATA pkt still will be recorded
1578 * for the reason of iwl_led.c need to control the led blinking based on
1579 * number of tx and rx data.
1580 *
1581 */
1582 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1583 {
1584 struct traffic_stats *stats;
1585
1586 if (is_tx)
1587 stats = &priv->tx_stats;
1588 else
1589 stats = &priv->rx_stats;
1590
1591 if (ieee80211_is_mgmt(fc)) {
1592 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1593 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1594 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1595 break;
1596 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1597 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1598 break;
1599 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1600 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1601 break;
1602 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1603 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1604 break;
1605 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1606 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1607 break;
1608 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1609 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1610 break;
1611 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1612 stats->mgmt[MANAGEMENT_BEACON]++;
1613 break;
1614 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1615 stats->mgmt[MANAGEMENT_ATIM]++;
1616 break;
1617 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1618 stats->mgmt[MANAGEMENT_DISASSOC]++;
1619 break;
1620 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1621 stats->mgmt[MANAGEMENT_AUTH]++;
1622 break;
1623 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1624 stats->mgmt[MANAGEMENT_DEAUTH]++;
1625 break;
1626 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1627 stats->mgmt[MANAGEMENT_ACTION]++;
1628 break;
1629 }
1630 } else if (ieee80211_is_ctl(fc)) {
1631 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1632 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1633 stats->ctrl[CONTROL_BACK_REQ]++;
1634 break;
1635 case cpu_to_le16(IEEE80211_STYPE_BACK):
1636 stats->ctrl[CONTROL_BACK]++;
1637 break;
1638 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1639 stats->ctrl[CONTROL_PSPOLL]++;
1640 break;
1641 case cpu_to_le16(IEEE80211_STYPE_RTS):
1642 stats->ctrl[CONTROL_RTS]++;
1643 break;
1644 case cpu_to_le16(IEEE80211_STYPE_CTS):
1645 stats->ctrl[CONTROL_CTS]++;
1646 break;
1647 case cpu_to_le16(IEEE80211_STYPE_ACK):
1648 stats->ctrl[CONTROL_ACK]++;
1649 break;
1650 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1651 stats->ctrl[CONTROL_CFEND]++;
1652 break;
1653 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1654 stats->ctrl[CONTROL_CFENDACK]++;
1655 break;
1656 }
1657 } else {
1658 /* data */
1659 stats->data_cnt++;
1660 stats->data_bytes += len;
1661 }
1662 }
1663 #endif
1664
1665 static void iwl_force_rf_reset(struct iwl_priv *priv)
1666 {
1667 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1668 return;
1669
1670 if (!iwl_is_any_associated(priv)) {
1671 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1672 return;
1673 }
1674 /*
1675 * There is no easy and better way to force reset the radio,
1676 * the only known method is switching channel which will force to
1677 * reset and tune the radio.
1678 * Use internal short scan (single channel) operation to should
1679 * achieve this objective.
1680 * Driver should reset the radio when number of consecutive missed
1681 * beacon, or any other uCode error condition detected.
1682 */
1683 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1684 iwl_internal_short_hw_scan(priv);
1685 }
1686
1687
1688 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1689 {
1690 struct iwl_force_reset *force_reset;
1691
1692 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1693 return -EINVAL;
1694
1695 if (mode >= IWL_MAX_FORCE_RESET) {
1696 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1697 return -EINVAL;
1698 }
1699 force_reset = &priv->force_reset[mode];
1700 force_reset->reset_request_count++;
1701 if (!external) {
1702 if (force_reset->last_force_reset_jiffies &&
1703 time_after(force_reset->last_force_reset_jiffies +
1704 force_reset->reset_duration, jiffies)) {
1705 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1706 force_reset->reset_reject_count++;
1707 return -EAGAIN;
1708 }
1709 }
1710 force_reset->reset_success_count++;
1711 force_reset->last_force_reset_jiffies = jiffies;
1712 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1713 switch (mode) {
1714 case IWL_RF_RESET:
1715 iwl_force_rf_reset(priv);
1716 break;
1717 case IWL_FW_RESET:
1718 /*
1719 * if the request is from external(ex: debugfs),
1720 * then always perform the request in regardless the module
1721 * parameter setting
1722 * if the request is from internal (uCode error or driver
1723 * detect failure), then fw_restart module parameter
1724 * need to be check before performing firmware reload
1725 */
1726 if (!external && !priv->cfg->mod_params->restart_fw) {
1727 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1728 "module parameter setting\n");
1729 break;
1730 }
1731 IWL_ERR(priv, "On demand firmware reload\n");
1732 iwlagn_fw_error(priv, true);
1733 break;
1734 }
1735 return 0;
1736 }
1737
1738 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1739 enum nl80211_iftype newtype, bool newp2p)
1740 {
1741 struct iwl_priv *priv = hw->priv;
1742 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1743 struct iwl_rxon_context *tmp;
1744 u32 interface_modes;
1745 int err;
1746
1747 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1748
1749 mutex_lock(&priv->mutex);
1750
1751 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1752 /*
1753 * Huh? But wait ... this can maybe happen when
1754 * we're in the middle of a firmware restart!
1755 */
1756 err = -EBUSY;
1757 goto out;
1758 }
1759
1760 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1761
1762 if (!(interface_modes & BIT(newtype))) {
1763 err = -EBUSY;
1764 goto out;
1765 }
1766
1767 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1768 for_each_context(priv, tmp) {
1769 if (ctx == tmp)
1770 continue;
1771
1772 if (!tmp->vif)
1773 continue;
1774
1775 /*
1776 * The current mode switch would be exclusive, but
1777 * another context is active ... refuse the switch.
1778 */
1779 err = -EBUSY;
1780 goto out;
1781 }
1782 }
1783
1784 /* success */
1785 iwl_teardown_interface(priv, vif, true);
1786 vif->type = newtype;
1787 vif->p2p = newp2p;
1788 err = iwl_setup_interface(priv, ctx);
1789 WARN_ON(err);
1790 /*
1791 * We've switched internally, but submitting to the
1792 * device may have failed for some reason. Mask this
1793 * error, because otherwise mac80211 will not switch
1794 * (and set the interface type back) and we'll be
1795 * out of sync with it.
1796 */
1797 err = 0;
1798
1799 out:
1800 mutex_unlock(&priv->mutex);
1801 return err;
1802 }
1803
1804 /*
1805 * On every watchdog tick we check (latest) time stamp. If it does not
1806 * change during timeout period and queue is not empty we reset firmware.
1807 */
1808 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1809 {
1810 struct iwl_tx_queue *txq = &priv->txq[cnt];
1811 struct iwl_queue *q = &txq->q;
1812 unsigned long timeout;
1813 int ret;
1814
1815 if (q->read_ptr == q->write_ptr) {
1816 txq->time_stamp = jiffies;
1817 return 0;
1818 }
1819
1820 timeout = txq->time_stamp +
1821 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1822
1823 if (time_after(jiffies, timeout)) {
1824 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1825 q->id, priv->cfg->base_params->wd_timeout);
1826 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1827 return (ret == -EAGAIN) ? 0 : 1;
1828 }
1829
1830 return 0;
1831 }
1832
1833 /*
1834 * Making watchdog tick be a quarter of timeout assure we will
1835 * discover the queue hung between timeout and 1.25*timeout
1836 */
1837 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1838
1839 /*
1840 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1841 * we reset the firmware. If everything is fine just rearm the timer.
1842 */
1843 void iwl_bg_watchdog(unsigned long data)
1844 {
1845 struct iwl_priv *priv = (struct iwl_priv *)data;
1846 int cnt;
1847 unsigned long timeout;
1848
1849 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1850 return;
1851
1852 timeout = priv->cfg->base_params->wd_timeout;
1853 if (timeout == 0)
1854 return;
1855
1856 /* monitor and check for stuck cmd queue */
1857 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1858 return;
1859
1860 /* monitor and check for other stuck queues */
1861 if (iwl_is_any_associated(priv)) {
1862 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1863 /* skip as we already checked the command queue */
1864 if (cnt == priv->cmd_queue)
1865 continue;
1866 if (iwl_check_stuck_queue(priv, cnt))
1867 return;
1868 }
1869 }
1870
1871 mod_timer(&priv->watchdog, jiffies +
1872 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1873 }
1874
1875 void iwl_setup_watchdog(struct iwl_priv *priv)
1876 {
1877 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1878
1879 if (timeout)
1880 mod_timer(&priv->watchdog,
1881 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1882 else
1883 del_timer(&priv->watchdog);
1884 }
1885
1886 /*
1887 * extended beacon time format
1888 * time in usec will be changed into a 32-bit value in extended:internal format
1889 * the extended part is the beacon counts
1890 * the internal part is the time in usec within one beacon interval
1891 */
1892 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1893 {
1894 u32 quot;
1895 u32 rem;
1896 u32 interval = beacon_interval * TIME_UNIT;
1897
1898 if (!interval || !usec)
1899 return 0;
1900
1901 quot = (usec / interval) &
1902 (iwl_beacon_time_mask_high(priv,
1903 priv->hw_params.beacon_time_tsf_bits) >>
1904 priv->hw_params.beacon_time_tsf_bits);
1905 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1906 priv->hw_params.beacon_time_tsf_bits);
1907
1908 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1909 }
1910
1911 /* base is usually what we get from ucode with each received frame,
1912 * the same as HW timer counter counting down
1913 */
1914 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1915 u32 addon, u32 beacon_interval)
1916 {
1917 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1918 priv->hw_params.beacon_time_tsf_bits);
1919 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1920 priv->hw_params.beacon_time_tsf_bits);
1921 u32 interval = beacon_interval * TIME_UNIT;
1922 u32 res = (base & iwl_beacon_time_mask_high(priv,
1923 priv->hw_params.beacon_time_tsf_bits)) +
1924 (addon & iwl_beacon_time_mask_high(priv,
1925 priv->hw_params.beacon_time_tsf_bits));
1926
1927 if (base_low > addon_low)
1928 res += base_low - addon_low;
1929 else if (base_low < addon_low) {
1930 res += interval + base_low - addon_low;
1931 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1932 } else
1933 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1934
1935 return cpu_to_le32(res);
1936 }
1937
1938 #ifdef CONFIG_PM
1939
1940 int iwl_pci_suspend(struct device *device)
1941 {
1942 struct pci_dev *pdev = to_pci_dev(device);
1943 struct iwl_priv *priv = pci_get_drvdata(pdev);
1944
1945 /*
1946 * This function is called when system goes into suspend state
1947 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1948 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1949 * it will not call apm_ops.stop() to stop the DMA operation.
1950 * Calling apm_ops.stop here to make sure we stop the DMA.
1951 */
1952 iwl_apm_stop(priv);
1953
1954 return 0;
1955 }
1956
1957 int iwl_pci_resume(struct device *device)
1958 {
1959 struct pci_dev *pdev = to_pci_dev(device);
1960 struct iwl_priv *priv = pci_get_drvdata(pdev);
1961 bool hw_rfkill = false;
1962
1963 /*
1964 * We disable the RETRY_TIMEOUT register (0x41) to keep
1965 * PCI Tx retries from interfering with C3 CPU state.
1966 */
1967 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
1968
1969 iwl_enable_interrupts(priv);
1970
1971 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1972 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1973 hw_rfkill = true;
1974
1975 if (hw_rfkill)
1976 set_bit(STATUS_RF_KILL_HW, &priv->status);
1977 else
1978 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1979
1980 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1981
1982 return 0;
1983 }
1984
1985 const struct dev_pm_ops iwl_pm_ops = {
1986 .suspend = iwl_pci_suspend,
1987 .resume = iwl_pci_resume,
1988 .freeze = iwl_pci_suspend,
1989 .thaw = iwl_pci_resume,
1990 .poweroff = iwl_pci_suspend,
1991 .restore = iwl_pci_resume,
1992 };
1993
1994 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree