?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blobefbde1f1a8bfca29924465c0c56ba57cf4c74e17
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2010 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 MODULE_DESCRIPTION("iwl core");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
50
51 /*
52 * set bt_coex_active to true, uCode will do kill/defer
53 * every time the priority line is asserted (BT is sending signals on the
54 * priority line in the PCIx).
55 * set bt_coex_active to false, uCode will ignore the BT activity and
56 * perform the normal operation
57 *
58 * User might experience transmit issue on some platform due to WiFi/BT
59 * co-exist problem. The possible behaviors are:
60 * Able to scan and finding all the available AP
61 * Not able to associate with any AP
62 * On those platforms, WiFi communication can be restored by set
63 * "bt_coex_active" module parameter to "false"
64 *
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
66 */
67 bool bt_coex_active = true;
68 EXPORT_SYMBOL_GPL(bt_coex_active);
69 module_param(bt_coex_active, bool, S_IRUGO);
70 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
71
72 u32 iwl_debug_level;
73 EXPORT_SYMBOL(iwl_debug_level);
74
75 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
76 EXPORT_SYMBOL(iwl_bcast_addr);
77
78
79 /* This function both allocates and initializes hw and priv. */
80 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
81 {
82 struct iwl_priv *priv;
83 /* mac80211 allocates memory for this device instance, including
84 * space for this driver's private structure */
85 struct ieee80211_hw *hw;
86
87 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
88 cfg->ops->ieee80211_ops);
89 if (hw == NULL) {
90 pr_err("%s: Can not allocate network device\n",
91 cfg->name);
92 goto out;
93 }
94
95 priv = hw->priv;
96 priv->hw = hw;
97
98 out:
99 return hw;
100 }
101 EXPORT_SYMBOL(iwl_alloc_all);
102
103 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
104 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
105 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
106 struct ieee80211_sta_ht_cap *ht_info,
107 enum ieee80211_band band)
108 {
109 u16 max_bit_rate = 0;
110 u8 rx_chains_num = priv->hw_params.rx_chains_num;
111 u8 tx_chains_num = priv->hw_params.tx_chains_num;
112
113 ht_info->cap = 0;
114 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
115
116 ht_info->ht_supported = true;
117
118 if (priv->cfg->ht_params &&
119 priv->cfg->ht_params->ht_greenfield_support)
120 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
121 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
122 max_bit_rate = MAX_BIT_RATE_20_MHZ;
123 if (priv->hw_params.ht40_channel & BIT(band)) {
124 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
125 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
126 ht_info->mcs.rx_mask[4] = 0x01;
127 max_bit_rate = MAX_BIT_RATE_40_MHZ;
128 }
129
130 if (priv->cfg->mod_params->amsdu_size_8K)
131 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
132
133 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
134 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
135 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
136 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
137 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
138 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
139
140 ht_info->mcs.rx_mask[0] = 0xFF;
141 if (rx_chains_num >= 2)
142 ht_info->mcs.rx_mask[1] = 0xFF;
143 if (rx_chains_num >= 3)
144 ht_info->mcs.rx_mask[2] = 0xFF;
145
146 /* Highest supported Rx data rate */
147 max_bit_rate *= rx_chains_num;
148 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
149 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
150
151 /* Tx MCS capabilities */
152 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
153 if (tx_chains_num != rx_chains_num) {
154 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
155 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
156 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
157 }
158 }
159
160 /**
161 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
162 */
163 int iwlcore_init_geos(struct iwl_priv *priv)
164 {
165 struct iwl_channel_info *ch;
166 struct ieee80211_supported_band *sband;
167 struct ieee80211_channel *channels;
168 struct ieee80211_channel *geo_ch;
169 struct ieee80211_rate *rates;
170 int i = 0;
171
172 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
173 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
174 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
175 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
176 return 0;
177 }
178
179 channels = kzalloc(sizeof(struct ieee80211_channel) *
180 priv->channel_count, GFP_KERNEL);
181 if (!channels)
182 return -ENOMEM;
183
184 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
185 GFP_KERNEL);
186 if (!rates) {
187 kfree(channels);
188 return -ENOMEM;
189 }
190
191 /* 5.2GHz channels start after the 2.4GHz channels */
192 sband = &priv->bands[IEEE80211_BAND_5GHZ];
193 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
194 /* just OFDM */
195 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
196 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
197
198 if (priv->cfg->sku & IWL_SKU_N)
199 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
200 IEEE80211_BAND_5GHZ);
201
202 sband = &priv->bands[IEEE80211_BAND_2GHZ];
203 sband->channels = channels;
204 /* OFDM & CCK */
205 sband->bitrates = rates;
206 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
207
208 if (priv->cfg->sku & IWL_SKU_N)
209 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
210 IEEE80211_BAND_2GHZ);
211
212 priv->ieee_channels = channels;
213 priv->ieee_rates = rates;
214
215 for (i = 0; i < priv->channel_count; i++) {
216 ch = &priv->channel_info[i];
217
218 /* FIXME: might be removed if scan is OK */
219 if (!is_channel_valid(ch))
220 continue;
221
222 if (is_channel_a_band(ch))
223 sband = &priv->bands[IEEE80211_BAND_5GHZ];
224 else
225 sband = &priv->bands[IEEE80211_BAND_2GHZ];
226
227 geo_ch = &sband->channels[sband->n_channels++];
228
229 geo_ch->center_freq =
230 ieee80211_channel_to_frequency(ch->channel);
231 geo_ch->max_power = ch->max_power_avg;
232 geo_ch->max_antenna_gain = 0xff;
233 geo_ch->hw_value = ch->channel;
234
235 if (is_channel_valid(ch)) {
236 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
237 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
238
239 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
240 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
241
242 if (ch->flags & EEPROM_CHANNEL_RADAR)
243 geo_ch->flags |= IEEE80211_CHAN_RADAR;
244
245 geo_ch->flags |= ch->ht40_extension_channel;
246
247 if (ch->max_power_avg > priv->tx_power_device_lmt)
248 priv->tx_power_device_lmt = ch->max_power_avg;
249 } else {
250 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
251 }
252
253 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
254 ch->channel, geo_ch->center_freq,
255 is_channel_a_band(ch) ? "5.2" : "2.4",
256 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
257 "restricted" : "valid",
258 geo_ch->flags);
259 }
260
261 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
262 priv->cfg->sku & IWL_SKU_A) {
263 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
264 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
265 priv->pci_dev->device,
266 priv->pci_dev->subsystem_device);
267 priv->cfg->sku &= ~IWL_SKU_A;
268 }
269
270 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
271 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
272 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
273
274 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
275
276 return 0;
277 }
278 EXPORT_SYMBOL(iwlcore_init_geos);
279
280 /*
281 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
282 */
283 void iwlcore_free_geos(struct iwl_priv *priv)
284 {
285 kfree(priv->ieee_channels);
286 kfree(priv->ieee_rates);
287 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
288 }
289 EXPORT_SYMBOL(iwlcore_free_geos);
290
291 static bool iwl_is_channel_extension(struct iwl_priv *priv,
292 enum ieee80211_band band,
293 u16 channel, u8 extension_chan_offset)
294 {
295 const struct iwl_channel_info *ch_info;
296
297 ch_info = iwl_get_channel_info(priv, band, channel);
298 if (!is_channel_valid(ch_info))
299 return false;
300
301 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
302 return !(ch_info->ht40_extension_channel &
303 IEEE80211_CHAN_NO_HT40PLUS);
304 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
305 return !(ch_info->ht40_extension_channel &
306 IEEE80211_CHAN_NO_HT40MINUS);
307
308 return false;
309 }
310
311 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
312 struct iwl_rxon_context *ctx,
313 struct ieee80211_sta_ht_cap *ht_cap)
314 {
315 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
316 return false;
317
318 /*
319 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
320 * the bit will not set if it is pure 40MHz case
321 */
322 if (ht_cap && !ht_cap->ht_supported)
323 return false;
324
325 #ifdef CONFIG_IWLWIFI_DEBUGFS
326 if (priv->disable_ht40)
327 return false;
328 #endif
329
330 return iwl_is_channel_extension(priv, priv->band,
331 le16_to_cpu(ctx->staging.channel),
332 ctx->ht.extension_chan_offset);
333 }
334 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
335
336 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
337 {
338 u16 new_val;
339 u16 beacon_factor;
340
341 /*
342 * If mac80211 hasn't given us a beacon interval, program
343 * the default into the device (not checking this here
344 * would cause the adjustment below to return the maximum
345 * value, which may break PAN.)
346 */
347 if (!beacon_val)
348 return DEFAULT_BEACON_INTERVAL;
349
350 /*
351 * If the beacon interval we obtained from the peer
352 * is too large, we'll have to wake up more often
353 * (and in IBSS case, we'll beacon too much)
354 *
355 * For example, if max_beacon_val is 4096, and the
356 * requested beacon interval is 7000, we'll have to
357 * use 3500 to be able to wake up on the beacons.
358 *
359 * This could badly influence beacon detection stats.
360 */
361
362 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
363 new_val = beacon_val / beacon_factor;
364
365 if (!new_val)
366 new_val = max_beacon_val;
367
368 return new_val;
369 }
370
371 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
372 {
373 u64 tsf;
374 s32 interval_tm, rem;
375 struct ieee80211_conf *conf = NULL;
376 u16 beacon_int;
377 struct ieee80211_vif *vif = ctx->vif;
378
379 conf = ieee80211_get_hw_conf(priv->hw);
380
381 lockdep_assert_held(&priv->mutex);
382
383 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
384
385 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
386 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
387
388 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
389
390 /*
391 * TODO: For IBSS we need to get atim_window from mac80211,
392 * for now just always use 0
393 */
394 ctx->timing.atim_window = 0;
395
396 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
397 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
398 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
399 priv->contexts[IWL_RXON_CTX_BSS].vif &&
400 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
401 ctx->timing.beacon_interval =
402 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
403 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
404 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
405 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
406 priv->contexts[IWL_RXON_CTX_PAN].vif &&
407 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
408 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
409 !ctx->vif->bss_conf.beacon_int)) {
410 ctx->timing.beacon_interval =
411 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
412 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
413 } else {
414 beacon_int = iwl_adjust_beacon_interval(beacon_int,
415 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
416 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
417 }
418
419 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
420 interval_tm = beacon_int * TIME_UNIT;
421 rem = do_div(tsf, interval_tm);
422 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
423
424 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
425
426 IWL_DEBUG_ASSOC(priv,
427 "beacon interval %d beacon timer %d beacon tim %d\n",
428 le16_to_cpu(ctx->timing.beacon_interval),
429 le32_to_cpu(ctx->timing.beacon_init_val),
430 le16_to_cpu(ctx->timing.atim_window));
431
432 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
433 sizeof(ctx->timing), &ctx->timing);
434 }
435 EXPORT_SYMBOL(iwl_send_rxon_timing);
436
437 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
438 int hw_decrypt)
439 {
440 struct iwl_rxon_cmd *rxon = &ctx->staging;
441
442 if (hw_decrypt)
443 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
444 else
445 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
446
447 }
448 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
449
450 /* validate RXON structure is valid */
451 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
452 {
453 struct iwl_rxon_cmd *rxon = &ctx->staging;
454 bool error = false;
455
456 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
457 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
458 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
459 error = true;
460 }
461 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
462 IWL_WARN(priv, "check 2.4G: wrong radar\n");
463 error = true;
464 }
465 } else {
466 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
467 IWL_WARN(priv, "check 5.2G: not short slot!\n");
468 error = true;
469 }
470 if (rxon->flags & RXON_FLG_CCK_MSK) {
471 IWL_WARN(priv, "check 5.2G: CCK!\n");
472 error = true;
473 }
474 }
475 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
476 IWL_WARN(priv, "mac/bssid mcast!\n");
477 error = true;
478 }
479
480 /* make sure basic rates 6Mbps and 1Mbps are supported */
481 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
482 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
483 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
484 error = true;
485 }
486
487 if (le16_to_cpu(rxon->assoc_id) > 2007) {
488 IWL_WARN(priv, "aid > 2007\n");
489 error = true;
490 }
491
492 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
493 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
494 IWL_WARN(priv, "CCK and short slot\n");
495 error = true;
496 }
497
498 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
499 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
500 IWL_WARN(priv, "CCK and auto detect");
501 error = true;
502 }
503
504 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
505 RXON_FLG_TGG_PROTECT_MSK)) ==
506 RXON_FLG_TGG_PROTECT_MSK) {
507 IWL_WARN(priv, "TGg but no auto-detect\n");
508 error = true;
509 }
510
511 if (error)
512 IWL_WARN(priv, "Tuning to channel %d\n",
513 le16_to_cpu(rxon->channel));
514
515 if (error) {
516 IWL_ERR(priv, "Invalid RXON\n");
517 return -EINVAL;
518 }
519 return 0;
520 }
521 EXPORT_SYMBOL(iwl_check_rxon_cmd);
522
523 /**
524 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
525 * @priv: staging_rxon is compared to active_rxon
526 *
527 * If the RXON structure is changing enough to require a new tune,
528 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
529 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
530 */
531 int iwl_full_rxon_required(struct iwl_priv *priv,
532 struct iwl_rxon_context *ctx)
533 {
534 const struct iwl_rxon_cmd *staging = &ctx->staging;
535 const struct iwl_rxon_cmd *active = &ctx->active;
536
537 #define CHK(cond) \
538 if ((cond)) { \
539 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
540 return 1; \
541 }
542
543 #define CHK_NEQ(c1, c2) \
544 if ((c1) != (c2)) { \
545 IWL_DEBUG_INFO(priv, "need full RXON - " \
546 #c1 " != " #c2 " - %d != %d\n", \
547 (c1), (c2)); \
548 return 1; \
549 }
550
551 /* These items are only settable from the full RXON command */
552 CHK(!iwl_is_associated_ctx(ctx));
553 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
554 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
555 CHK(compare_ether_addr(staging->wlap_bssid_addr,
556 active->wlap_bssid_addr));
557 CHK_NEQ(staging->dev_type, active->dev_type);
558 CHK_NEQ(staging->channel, active->channel);
559 CHK_NEQ(staging->air_propagation, active->air_propagation);
560 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
561 active->ofdm_ht_single_stream_basic_rates);
562 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
563 active->ofdm_ht_dual_stream_basic_rates);
564 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
565 active->ofdm_ht_triple_stream_basic_rates);
566 CHK_NEQ(staging->assoc_id, active->assoc_id);
567
568 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
569 * be updated with the RXON_ASSOC command -- however only some
570 * flag transitions are allowed using RXON_ASSOC */
571
572 /* Check if we are not switching bands */
573 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
574 active->flags & RXON_FLG_BAND_24G_MSK);
575
576 /* Check if we are switching association toggle */
577 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
578 active->filter_flags & RXON_FILTER_ASSOC_MSK);
579
580 #undef CHK
581 #undef CHK_NEQ
582
583 return 0;
584 }
585 EXPORT_SYMBOL(iwl_full_rxon_required);
586
587 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
588 struct iwl_rxon_context *ctx)
589 {
590 /*
591 * Assign the lowest rate -- should really get this from
592 * the beacon skb from mac80211.
593 */
594 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
595 return IWL_RATE_1M_PLCP;
596 else
597 return IWL_RATE_6M_PLCP;
598 }
599 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
600
601 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
602 struct iwl_ht_config *ht_conf,
603 struct iwl_rxon_context *ctx)
604 {
605 struct iwl_rxon_cmd *rxon = &ctx->staging;
606
607 if (!ctx->ht.enabled) {
608 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
609 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
610 RXON_FLG_HT40_PROT_MSK |
611 RXON_FLG_HT_PROT_MSK);
612 return;
613 }
614
615 /* FIXME: if the definition of ht.protection changed, the "translation"
616 * will be needed for rxon->flags
617 */
618 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
619
620 /* Set up channel bandwidth:
621 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
622 /* clear the HT channel mode before set the mode */
623 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
624 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
625 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
626 /* pure ht40 */
627 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
628 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
629 /* Note: control channel is opposite of extension channel */
630 switch (ctx->ht.extension_chan_offset) {
631 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
632 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
633 break;
634 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
635 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
636 break;
637 }
638 } else {
639 /* Note: control channel is opposite of extension channel */
640 switch (ctx->ht.extension_chan_offset) {
641 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
642 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
643 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
644 break;
645 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
646 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
647 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
648 break;
649 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
650 default:
651 /* channel location only valid if in Mixed mode */
652 IWL_ERR(priv, "invalid extension channel offset\n");
653 break;
654 }
655 }
656 } else {
657 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
658 }
659
660 if (priv->cfg->ops->hcmd->set_rxon_chain)
661 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
662
663 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
664 "extension channel offset 0x%x\n",
665 le32_to_cpu(rxon->flags), ctx->ht.protection,
666 ctx->ht.extension_chan_offset);
667 }
668
669 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
670 {
671 struct iwl_rxon_context *ctx;
672
673 for_each_context(priv, ctx)
674 _iwl_set_rxon_ht(priv, ht_conf, ctx);
675 }
676 EXPORT_SYMBOL(iwl_set_rxon_ht);
677
678 /* Return valid, unused, channel for a passive scan to reset the RF */
679 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
680 enum ieee80211_band band)
681 {
682 const struct iwl_channel_info *ch_info;
683 int i;
684 u8 channel = 0;
685 u8 min, max;
686 struct iwl_rxon_context *ctx;
687
688 if (band == IEEE80211_BAND_5GHZ) {
689 min = 14;
690 max = priv->channel_count;
691 } else {
692 min = 0;
693 max = 14;
694 }
695
696 for (i = min; i < max; i++) {
697 bool busy = false;
698
699 for_each_context(priv, ctx) {
700 busy = priv->channel_info[i].channel ==
701 le16_to_cpu(ctx->staging.channel);
702 if (busy)
703 break;
704 }
705
706 if (busy)
707 continue;
708
709 channel = priv->channel_info[i].channel;
710 ch_info = iwl_get_channel_info(priv, band, channel);
711 if (is_channel_valid(ch_info))
712 break;
713 }
714
715 return channel;
716 }
717 EXPORT_SYMBOL(iwl_get_single_channel_number);
718
719 /**
720 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
721 * @ch: requested channel as a pointer to struct ieee80211_channel
722
723 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
724 * in the staging RXON flag structure based on the ch->band
725 */
726 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
727 struct iwl_rxon_context *ctx)
728 {
729 enum ieee80211_band band = ch->band;
730 u16 channel = ch->hw_value;
731
732 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
733 (priv->band == band))
734 return 0;
735
736 ctx->staging.channel = cpu_to_le16(channel);
737 if (band == IEEE80211_BAND_5GHZ)
738 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
739 else
740 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
741
742 priv->band = band;
743
744 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
745
746 return 0;
747 }
748 EXPORT_SYMBOL(iwl_set_rxon_channel);
749
750 void iwl_set_flags_for_band(struct iwl_priv *priv,
751 struct iwl_rxon_context *ctx,
752 enum ieee80211_band band,
753 struct ieee80211_vif *vif)
754 {
755 if (band == IEEE80211_BAND_5GHZ) {
756 ctx->staging.flags &=
757 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
758 | RXON_FLG_CCK_MSK);
759 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
760 } else {
761 /* Copied from iwl_post_associate() */
762 if (vif && vif->bss_conf.use_short_slot)
763 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
764 else
765 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
766
767 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
768 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
769 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
770 }
771 }
772 EXPORT_SYMBOL(iwl_set_flags_for_band);
773
774 /*
775 * initialize rxon structure with default values from eeprom
776 */
777 void iwl_connection_init_rx_config(struct iwl_priv *priv,
778 struct iwl_rxon_context *ctx)
779 {
780 const struct iwl_channel_info *ch_info;
781
782 memset(&ctx->staging, 0, sizeof(ctx->staging));
783
784 if (!ctx->vif) {
785 ctx->staging.dev_type = ctx->unused_devtype;
786 } else switch (ctx->vif->type) {
787 case NL80211_IFTYPE_AP:
788 ctx->staging.dev_type = ctx->ap_devtype;
789 break;
790
791 case NL80211_IFTYPE_STATION:
792 ctx->staging.dev_type = ctx->station_devtype;
793 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
794 break;
795
796 case NL80211_IFTYPE_ADHOC:
797 ctx->staging.dev_type = ctx->ibss_devtype;
798 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
799 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
800 RXON_FILTER_ACCEPT_GRP_MSK;
801 break;
802
803 default:
804 IWL_ERR(priv, "Unsupported interface type %d\n",
805 ctx->vif->type);
806 break;
807 }
808
809 #if 0
810 /* TODO: Figure out when short_preamble would be set and cache from
811 * that */
812 if (!hw_to_local(priv->hw)->short_preamble)
813 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
814 else
815 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
816 #endif
817
818 ch_info = iwl_get_channel_info(priv, priv->band,
819 le16_to_cpu(ctx->active.channel));
820
821 if (!ch_info)
822 ch_info = &priv->channel_info[0];
823
824 ctx->staging.channel = cpu_to_le16(ch_info->channel);
825 priv->band = ch_info->band;
826
827 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
828
829 ctx->staging.ofdm_basic_rates =
830 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
831 ctx->staging.cck_basic_rates =
832 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
833
834 /* clear both MIX and PURE40 mode flag */
835 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
836 RXON_FLG_CHANNEL_MODE_PURE_40);
837 if (ctx->vif)
838 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
839
840 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
841 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
842 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
843 }
844 EXPORT_SYMBOL(iwl_connection_init_rx_config);
845
846 void iwl_set_rate(struct iwl_priv *priv)
847 {
848 const struct ieee80211_supported_band *hw = NULL;
849 struct ieee80211_rate *rate;
850 struct iwl_rxon_context *ctx;
851 int i;
852
853 hw = iwl_get_hw_mode(priv, priv->band);
854 if (!hw) {
855 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
856 return;
857 }
858
859 priv->active_rate = 0;
860
861 for (i = 0; i < hw->n_bitrates; i++) {
862 rate = &(hw->bitrates[i]);
863 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
864 priv->active_rate |= (1 << rate->hw_value);
865 }
866
867 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
868
869 for_each_context(priv, ctx) {
870 ctx->staging.cck_basic_rates =
871 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
872
873 ctx->staging.ofdm_basic_rates =
874 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
875 }
876 }
877 EXPORT_SYMBOL(iwl_set_rate);
878
879 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
880 {
881 /*
882 * MULTI-FIXME
883 * See iwl_mac_channel_switch.
884 */
885 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
886
887 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
888 return;
889
890 if (priv->switch_rxon.switch_in_progress) {
891 ieee80211_chswitch_done(ctx->vif, is_success);
892 mutex_lock(&priv->mutex);
893 priv->switch_rxon.switch_in_progress = false;
894 mutex_unlock(&priv->mutex);
895 }
896 }
897 EXPORT_SYMBOL(iwl_chswitch_done);
898
899 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
900 {
901 struct iwl_rx_packet *pkt = rxb_addr(rxb);
902 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
903 /*
904 * MULTI-FIXME
905 * See iwl_mac_channel_switch.
906 */
907 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
908 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
909
910 if (priv->switch_rxon.switch_in_progress) {
911 if (!le32_to_cpu(csa->status) &&
912 (csa->channel == priv->switch_rxon.channel)) {
913 rxon->channel = csa->channel;
914 ctx->staging.channel = csa->channel;
915 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
916 le16_to_cpu(csa->channel));
917 iwl_chswitch_done(priv, true);
918 } else {
919 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
920 le16_to_cpu(csa->channel));
921 iwl_chswitch_done(priv, false);
922 }
923 }
924 }
925 EXPORT_SYMBOL(iwl_rx_csa);
926
927 #ifdef CONFIG_IWLWIFI_DEBUG
928 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
929 struct iwl_rxon_context *ctx)
930 {
931 struct iwl_rxon_cmd *rxon = &ctx->staging;
932
933 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
934 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
935 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
936 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
937 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
938 le32_to_cpu(rxon->filter_flags));
939 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
940 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
941 rxon->ofdm_basic_rates);
942 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
943 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
944 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
945 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
946 }
947 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
948 #endif
949 /**
950 * iwl_irq_handle_error - called for HW or SW error interrupt from card
951 */
952 void iwl_irq_handle_error(struct iwl_priv *priv)
953 {
954 /* Set the FW error flag -- cleared on iwl_down */
955 set_bit(STATUS_FW_ERROR, &priv->status);
956
957 /* Cancel currently queued command. */
958 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
959
960 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
961 if (priv->cfg->internal_wimax_coex &&
962 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
963 APMS_CLK_VAL_MRB_FUNC_MODE) ||
964 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
965 APMG_PS_CTRL_VAL_RESET_REQ))) {
966 wake_up_interruptible(&priv->wait_command_queue);
967 /*
968 *Keep the restart process from trying to send host
969 * commands by clearing the INIT status bit
970 */
971 clear_bit(STATUS_READY, &priv->status);
972 IWL_ERR(priv, "RF is used by WiMAX\n");
973 return;
974 }
975
976 IWL_ERR(priv, "Loaded firmware version: %s\n",
977 priv->hw->wiphy->fw_version);
978
979 priv->cfg->ops->lib->dump_nic_error_log(priv);
980 if (priv->cfg->ops->lib->dump_csr)
981 priv->cfg->ops->lib->dump_csr(priv);
982 if (priv->cfg->ops->lib->dump_fh)
983 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
984 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
985 #ifdef CONFIG_IWLWIFI_DEBUG
986 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
987 iwl_print_rx_config_cmd(priv,
988 &priv->contexts[IWL_RXON_CTX_BSS]);
989 #endif
990
991 wake_up_interruptible(&priv->wait_command_queue);
992
993 /* Keep the restart process from trying to send host
994 * commands by clearing the INIT status bit */
995 clear_bit(STATUS_READY, &priv->status);
996
997 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
998 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
999 "Restarting adapter due to uCode error.\n");
1000
1001 if (priv->cfg->mod_params->restart_fw)
1002 queue_work(priv->workqueue, &priv->restart);
1003 }
1004 }
1005 EXPORT_SYMBOL(iwl_irq_handle_error);
1006
1007 static int iwl_apm_stop_master(struct iwl_priv *priv)
1008 {
1009 int ret = 0;
1010
1011 /* stop device's busmaster DMA activity */
1012 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1013
1014 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1015 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1016 if (ret)
1017 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1018
1019 IWL_DEBUG_INFO(priv, "stop master\n");
1020
1021 return ret;
1022 }
1023
1024 void iwl_apm_stop(struct iwl_priv *priv)
1025 {
1026 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1027
1028 /* Stop device's DMA activity */
1029 iwl_apm_stop_master(priv);
1030
1031 /* Reset the entire device */
1032 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1033
1034 udelay(10);
1035
1036 /*
1037 * Clear "initialization complete" bit to move adapter from
1038 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1039 */
1040 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1041 }
1042 EXPORT_SYMBOL(iwl_apm_stop);
1043
1044
1045 /*
1046 * Start up NIC's basic functionality after it has been reset
1047 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1048 * NOTE: This does not load uCode nor start the embedded processor
1049 */
1050 int iwl_apm_init(struct iwl_priv *priv)
1051 {
1052 int ret = 0;
1053 u16 lctl;
1054
1055 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1056
1057 /*
1058 * Use "set_bit" below rather than "write", to preserve any hardware
1059 * bits already set by default after reset.
1060 */
1061
1062 /* Disable L0S exit timer (platform NMI Work/Around) */
1063 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1064 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1065
1066 /*
1067 * Disable L0s without affecting L1;
1068 * don't wait for ICH L0s (ICH bug W/A)
1069 */
1070 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1071 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1072
1073 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1074 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1075
1076 /*
1077 * Enable HAP INTA (interrupt from management bus) to
1078 * wake device's PCI Express link L1a -> L0s
1079 * NOTE: This is no-op for 3945 (non-existant bit)
1080 */
1081 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1082 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1083
1084 /*
1085 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1086 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1087 * If so (likely), disable L0S, so device moves directly L0->L1;
1088 * costs negligible amount of power savings.
1089 * If not (unlikely), enable L0S, so there is at least some
1090 * power savings, even without L1.
1091 */
1092 if (priv->cfg->base_params->set_l0s) {
1093 lctl = iwl_pcie_link_ctl(priv);
1094 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1095 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1096 /* L1-ASPM enabled; disable(!) L0S */
1097 iwl_set_bit(priv, CSR_GIO_REG,
1098 CSR_GIO_REG_VAL_L0S_ENABLED);
1099 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1100 } else {
1101 /* L1-ASPM disabled; enable(!) L0S */
1102 iwl_clear_bit(priv, CSR_GIO_REG,
1103 CSR_GIO_REG_VAL_L0S_ENABLED);
1104 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1105 }
1106 }
1107
1108 /* Configure analog phase-lock-loop before activating to D0A */
1109 if (priv->cfg->base_params->pll_cfg_val)
1110 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1111 priv->cfg->base_params->pll_cfg_val);
1112
1113 /*
1114 * Set "initialization complete" bit to move adapter from
1115 * D0U* --> D0A* (powered-up active) state.
1116 */
1117 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1118
1119 /*
1120 * Wait for clock stabilization; once stabilized, access to
1121 * device-internal resources is supported, e.g. iwl_write_prph()
1122 * and accesses to uCode SRAM.
1123 */
1124 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1125 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1126 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1127 if (ret < 0) {
1128 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1129 goto out;
1130 }
1131
1132 /*
1133 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1134 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1135 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1136 * and don't need BSM to restore data after power-saving sleep.
1137 *
1138 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1139 * do not disable clocks. This preserves any hardware bits already
1140 * set by default in "CLK_CTRL_REG" after reset.
1141 */
1142 if (priv->cfg->base_params->use_bsm)
1143 iwl_write_prph(priv, APMG_CLK_EN_REG,
1144 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1145 else
1146 iwl_write_prph(priv, APMG_CLK_EN_REG,
1147 APMG_CLK_VAL_DMA_CLK_RQT);
1148 udelay(20);
1149
1150 /* Disable L1-Active */
1151 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1152 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1153
1154 out:
1155 return ret;
1156 }
1157 EXPORT_SYMBOL(iwl_apm_init);
1158
1159
1160 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1161 {
1162 int ret;
1163 s8 prev_tx_power;
1164
1165 lockdep_assert_held(&priv->mutex);
1166
1167 if (priv->tx_power_user_lmt == tx_power && !force)
1168 return 0;
1169
1170 if (!priv->cfg->ops->lib->send_tx_power)
1171 return -EOPNOTSUPP;
1172
1173 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1174 IWL_WARN(priv,
1175 "Requested user TXPOWER %d below lower limit %d.\n",
1176 tx_power,
1177 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1178 return -EINVAL;
1179 }
1180
1181 if (tx_power > priv->tx_power_device_lmt) {
1182 IWL_WARN(priv,
1183 "Requested user TXPOWER %d above upper limit %d.\n",
1184 tx_power, priv->tx_power_device_lmt);
1185 return -EINVAL;
1186 }
1187
1188 if (!iwl_is_ready_rf(priv))
1189 return -EIO;
1190
1191 /* scan complete use tx_power_next, need to be updated */
1192 priv->tx_power_next = tx_power;
1193 if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
1194 IWL_DEBUG_INFO(priv, "Deferring tx power set while scanning\n");
1195 return 0;
1196 }
1197
1198 prev_tx_power = priv->tx_power_user_lmt;
1199 priv->tx_power_user_lmt = tx_power;
1200
1201 ret = priv->cfg->ops->lib->send_tx_power(priv);
1202
1203 /* if fail to set tx_power, restore the orig. tx power */
1204 if (ret) {
1205 priv->tx_power_user_lmt = prev_tx_power;
1206 priv->tx_power_next = prev_tx_power;
1207 }
1208 return ret;
1209 }
1210 EXPORT_SYMBOL(iwl_set_tx_power);
1211
1212 void iwl_send_bt_config(struct iwl_priv *priv)
1213 {
1214 struct iwl_bt_cmd bt_cmd = {
1215 .lead_time = BT_LEAD_TIME_DEF,
1216 .max_kill = BT_MAX_KILL_DEF,
1217 .kill_ack_mask = 0,
1218 .kill_cts_mask = 0,
1219 };
1220
1221 if (!bt_coex_active)
1222 bt_cmd.flags = BT_COEX_DISABLE;
1223 else
1224 bt_cmd.flags = BT_COEX_ENABLE;
1225
1226 priv->bt_enable_flag = bt_cmd.flags;
1227 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1228 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1229
1230 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1231 sizeof(struct iwl_bt_cmd), &bt_cmd))
1232 IWL_ERR(priv, "failed to send BT Coex Config\n");
1233 }
1234 EXPORT_SYMBOL(iwl_send_bt_config);
1235
1236 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1237 {
1238 struct iwl_statistics_cmd statistics_cmd = {
1239 .configuration_flags =
1240 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1241 };
1242
1243 if (flags & CMD_ASYNC)
1244 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1245 sizeof(struct iwl_statistics_cmd),
1246 &statistics_cmd, NULL);
1247 else
1248 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1249 sizeof(struct iwl_statistics_cmd),
1250 &statistics_cmd);
1251 }
1252 EXPORT_SYMBOL(iwl_send_statistics_request);
1253
1254 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1255 struct iwl_rx_mem_buffer *rxb)
1256 {
1257 #ifdef CONFIG_IWLWIFI_DEBUG
1258 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1259 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1260 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1261 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1262 #endif
1263 }
1264 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1265
1266 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1267 struct iwl_rx_mem_buffer *rxb)
1268 {
1269 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1270 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1271 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1272 "notification for %s:\n", len,
1273 get_cmd_string(pkt->hdr.cmd));
1274 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1275 }
1276 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1277
1278 void iwl_rx_reply_error(struct iwl_priv *priv,
1279 struct iwl_rx_mem_buffer *rxb)
1280 {
1281 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1282
1283 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1284 "seq 0x%04X ser 0x%08X\n",
1285 le32_to_cpu(pkt->u.err_resp.error_type),
1286 get_cmd_string(pkt->u.err_resp.cmd_id),
1287 pkt->u.err_resp.cmd_id,
1288 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1289 le32_to_cpu(pkt->u.err_resp.error_info));
1290 }
1291 EXPORT_SYMBOL(iwl_rx_reply_error);
1292
1293 void iwl_clear_isr_stats(struct iwl_priv *priv)
1294 {
1295 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1296 }
1297
1298 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1299 const struct ieee80211_tx_queue_params *params)
1300 {
1301 struct iwl_priv *priv = hw->priv;
1302 struct iwl_rxon_context *ctx;
1303 unsigned long flags;
1304 int q;
1305
1306 IWL_DEBUG_MAC80211(priv, "enter\n");
1307
1308 if (!iwl_is_ready_rf(priv)) {
1309 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1310 return -EIO;
1311 }
1312
1313 if (queue >= AC_NUM) {
1314 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1315 return 0;
1316 }
1317
1318 q = AC_NUM - 1 - queue;
1319
1320 spin_lock_irqsave(&priv->lock, flags);
1321
1322 /*
1323 * MULTI-FIXME
1324 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1325 */
1326 for_each_context(priv, ctx) {
1327 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1328 cpu_to_le16(params->cw_min);
1329 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1330 cpu_to_le16(params->cw_max);
1331 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1332 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1333 cpu_to_le16((params->txop * 32));
1334
1335 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1336 }
1337
1338 spin_unlock_irqrestore(&priv->lock, flags);
1339
1340 IWL_DEBUG_MAC80211(priv, "leave\n");
1341 return 0;
1342 }
1343 EXPORT_SYMBOL(iwl_mac_conf_tx);
1344
1345 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1346 {
1347 struct iwl_priv *priv = hw->priv;
1348
1349 return priv->ibss_manager == IWL_IBSS_MANAGER;
1350 }
1351 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1352
1353 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1354 {
1355 iwl_connection_init_rx_config(priv, ctx);
1356
1357 if (priv->cfg->ops->hcmd->set_rxon_chain)
1358 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1359
1360 return iwlcore_commit_rxon(priv, ctx);
1361 }
1362
1363 static int iwl_setup_interface(struct iwl_priv *priv,
1364 struct iwl_rxon_context *ctx)
1365 {
1366 struct ieee80211_vif *vif = ctx->vif;
1367 int err;
1368
1369 lockdep_assert_held(&priv->mutex);
1370
1371 /*
1372 * This variable will be correct only when there's just
1373 * a single context, but all code using it is for hardware
1374 * that supports only one context.
1375 */
1376 priv->iw_mode = vif->type;
1377
1378 ctx->is_active = true;
1379
1380 err = iwl_set_mode(priv, ctx);
1381 if (err) {
1382 if (!ctx->always_active)
1383 ctx->is_active = false;
1384 return err;
1385 }
1386
1387 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1388 vif->type == NL80211_IFTYPE_ADHOC) {
1389 /*
1390 * pretend to have high BT traffic as long as we
1391 * are operating in IBSS mode, as this will cause
1392 * the rate scaling etc. to behave as intended.
1393 */
1394 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1395 }
1396
1397 return 0;
1398 }
1399
1400 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1401 {
1402 struct iwl_priv *priv = hw->priv;
1403 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1404 struct iwl_rxon_context *tmp, *ctx = NULL;
1405 int err;
1406
1407 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1408 vif->type, vif->addr);
1409
1410 mutex_lock(&priv->mutex);
1411
1412 if (!iwl_is_ready_rf(priv)) {
1413 IWL_WARN(priv, "Try to add interface when device not ready\n");
1414 err = -EINVAL;
1415 goto out;
1416 }
1417
1418 for_each_context(priv, tmp) {
1419 u32 possible_modes =
1420 tmp->interface_modes | tmp->exclusive_interface_modes;
1421
1422 if (tmp->vif) {
1423 /* check if this busy context is exclusive */
1424 if (tmp->exclusive_interface_modes &
1425 BIT(tmp->vif->type)) {
1426 err = -EINVAL;
1427 goto out;
1428 }
1429 continue;
1430 }
1431
1432 if (!(possible_modes & BIT(vif->type)))
1433 continue;
1434
1435 /* have maybe usable context w/o interface */
1436 ctx = tmp;
1437 break;
1438 }
1439
1440 if (!ctx) {
1441 err = -EOPNOTSUPP;
1442 goto out;
1443 }
1444
1445 vif_priv->ctx = ctx;
1446 ctx->vif = vif;
1447
1448 err = iwl_setup_interface(priv, ctx);
1449 if (!err)
1450 goto out;
1451
1452 ctx->vif = NULL;
1453 priv->iw_mode = NL80211_IFTYPE_STATION;
1454 out:
1455 mutex_unlock(&priv->mutex);
1456
1457 IWL_DEBUG_MAC80211(priv, "leave\n");
1458 return err;
1459 }
1460 EXPORT_SYMBOL(iwl_mac_add_interface);
1461
1462 static void iwl_teardown_interface(struct iwl_priv *priv,
1463 struct ieee80211_vif *vif,
1464 bool mode_change)
1465 {
1466 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1467
1468 lockdep_assert_held(&priv->mutex);
1469
1470 if (priv->scan_vif == vif) {
1471 iwl_scan_cancel_timeout(priv, 200);
1472 iwl_force_scan_end(priv);
1473 }
1474
1475 if (!mode_change) {
1476 iwl_set_mode(priv, ctx);
1477 if (!ctx->always_active)
1478 ctx->is_active = false;
1479 }
1480
1481 /*
1482 * When removing the IBSS interface, overwrite the
1483 * BT traffic load with the stored one from the last
1484 * notification, if any. If this is a device that
1485 * doesn't implement this, this has no effect since
1486 * both values are the same and zero.
1487 */
1488 if (vif->type == NL80211_IFTYPE_ADHOC)
1489 priv->bt_traffic_load = priv->last_bt_traffic_load;
1490 }
1491
1492 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1493 struct ieee80211_vif *vif)
1494 {
1495 struct iwl_priv *priv = hw->priv;
1496 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1497
1498 IWL_DEBUG_MAC80211(priv, "enter\n");
1499
1500 mutex_lock(&priv->mutex);
1501
1502 WARN_ON(ctx->vif != vif);
1503 ctx->vif = NULL;
1504
1505 iwl_teardown_interface(priv, vif, false);
1506
1507 memset(priv->bssid, 0, ETH_ALEN);
1508 mutex_unlock(&priv->mutex);
1509
1510 IWL_DEBUG_MAC80211(priv, "leave\n");
1511
1512 }
1513 EXPORT_SYMBOL(iwl_mac_remove_interface);
1514
1515 int iwl_alloc_txq_mem(struct iwl_priv *priv)
1516 {
1517 if (!priv->txq)
1518 priv->txq = kzalloc(
1519 sizeof(struct iwl_tx_queue) *
1520 priv->cfg->base_params->num_of_queues,
1521 GFP_KERNEL);
1522 if (!priv->txq) {
1523 IWL_ERR(priv, "Not enough memory for txq\n");
1524 return -ENOMEM;
1525 }
1526 return 0;
1527 }
1528 EXPORT_SYMBOL(iwl_alloc_txq_mem);
1529
1530 void iwl_free_txq_mem(struct iwl_priv *priv)
1531 {
1532 kfree(priv->txq);
1533 priv->txq = NULL;
1534 }
1535 EXPORT_SYMBOL(iwl_free_txq_mem);
1536
1537 #ifdef CONFIG_IWLWIFI_DEBUGFS
1538
1539 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1540
1541 void iwl_reset_traffic_log(struct iwl_priv *priv)
1542 {
1543 priv->tx_traffic_idx = 0;
1544 priv->rx_traffic_idx = 0;
1545 if (priv->tx_traffic)
1546 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1547 if (priv->rx_traffic)
1548 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1549 }
1550
1551 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1552 {
1553 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1554
1555 if (iwl_debug_level & IWL_DL_TX) {
1556 if (!priv->tx_traffic) {
1557 priv->tx_traffic =
1558 kzalloc(traffic_size, GFP_KERNEL);
1559 if (!priv->tx_traffic)
1560 return -ENOMEM;
1561 }
1562 }
1563 if (iwl_debug_level & IWL_DL_RX) {
1564 if (!priv->rx_traffic) {
1565 priv->rx_traffic =
1566 kzalloc(traffic_size, GFP_KERNEL);
1567 if (!priv->rx_traffic)
1568 return -ENOMEM;
1569 }
1570 }
1571 iwl_reset_traffic_log(priv);
1572 return 0;
1573 }
1574 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
1575
1576 void iwl_free_traffic_mem(struct iwl_priv *priv)
1577 {
1578 kfree(priv->tx_traffic);
1579 priv->tx_traffic = NULL;
1580
1581 kfree(priv->rx_traffic);
1582 priv->rx_traffic = NULL;
1583 }
1584 EXPORT_SYMBOL(iwl_free_traffic_mem);
1585
1586 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1587 u16 length, struct ieee80211_hdr *header)
1588 {
1589 __le16 fc;
1590 u16 len;
1591
1592 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1593 return;
1594
1595 if (!priv->tx_traffic)
1596 return;
1597
1598 fc = header->frame_control;
1599 if (ieee80211_is_data(fc)) {
1600 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1601 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1602 memcpy((priv->tx_traffic +
1603 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1604 header, len);
1605 priv->tx_traffic_idx =
1606 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1607 }
1608 }
1609 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
1610
1611 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1612 u16 length, struct ieee80211_hdr *header)
1613 {
1614 __le16 fc;
1615 u16 len;
1616
1617 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1618 return;
1619
1620 if (!priv->rx_traffic)
1621 return;
1622
1623 fc = header->frame_control;
1624 if (ieee80211_is_data(fc)) {
1625 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1626 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1627 memcpy((priv->rx_traffic +
1628 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1629 header, len);
1630 priv->rx_traffic_idx =
1631 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1632 }
1633 }
1634 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
1635
1636 const char *get_mgmt_string(int cmd)
1637 {
1638 switch (cmd) {
1639 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1640 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1641 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1642 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1643 IWL_CMD(MANAGEMENT_PROBE_REQ);
1644 IWL_CMD(MANAGEMENT_PROBE_RESP);
1645 IWL_CMD(MANAGEMENT_BEACON);
1646 IWL_CMD(MANAGEMENT_ATIM);
1647 IWL_CMD(MANAGEMENT_DISASSOC);
1648 IWL_CMD(MANAGEMENT_AUTH);
1649 IWL_CMD(MANAGEMENT_DEAUTH);
1650 IWL_CMD(MANAGEMENT_ACTION);
1651 default:
1652 return "UNKNOWN";
1653
1654 }
1655 }
1656
1657 const char *get_ctrl_string(int cmd)
1658 {
1659 switch (cmd) {
1660 IWL_CMD(CONTROL_BACK_REQ);
1661 IWL_CMD(CONTROL_BACK);
1662 IWL_CMD(CONTROL_PSPOLL);
1663 IWL_CMD(CONTROL_RTS);
1664 IWL_CMD(CONTROL_CTS);
1665 IWL_CMD(CONTROL_ACK);
1666 IWL_CMD(CONTROL_CFEND);
1667 IWL_CMD(CONTROL_CFENDACK);
1668 default:
1669 return "UNKNOWN";
1670
1671 }
1672 }
1673
1674 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1675 {
1676 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1677 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1678 priv->led_tpt = 0;
1679 }
1680
1681 /*
1682 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1683 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1684 * Use debugFs to display the rx/rx_statistics
1685 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1686 * information will be recorded, but DATA pkt still will be recorded
1687 * for the reason of iwl_led.c need to control the led blinking based on
1688 * number of tx and rx data.
1689 *
1690 */
1691 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1692 {
1693 struct traffic_stats *stats;
1694
1695 if (is_tx)
1696 stats = &priv->tx_stats;
1697 else
1698 stats = &priv->rx_stats;
1699
1700 if (ieee80211_is_mgmt(fc)) {
1701 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1702 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1703 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1704 break;
1705 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1706 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1707 break;
1708 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1709 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1710 break;
1711 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1712 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1713 break;
1714 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1715 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1716 break;
1717 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1718 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1719 break;
1720 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1721 stats->mgmt[MANAGEMENT_BEACON]++;
1722 break;
1723 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1724 stats->mgmt[MANAGEMENT_ATIM]++;
1725 break;
1726 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1727 stats->mgmt[MANAGEMENT_DISASSOC]++;
1728 break;
1729 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1730 stats->mgmt[MANAGEMENT_AUTH]++;
1731 break;
1732 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1733 stats->mgmt[MANAGEMENT_DEAUTH]++;
1734 break;
1735 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1736 stats->mgmt[MANAGEMENT_ACTION]++;
1737 break;
1738 }
1739 } else if (ieee80211_is_ctl(fc)) {
1740 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1741 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1742 stats->ctrl[CONTROL_BACK_REQ]++;
1743 break;
1744 case cpu_to_le16(IEEE80211_STYPE_BACK):
1745 stats->ctrl[CONTROL_BACK]++;
1746 break;
1747 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1748 stats->ctrl[CONTROL_PSPOLL]++;
1749 break;
1750 case cpu_to_le16(IEEE80211_STYPE_RTS):
1751 stats->ctrl[CONTROL_RTS]++;
1752 break;
1753 case cpu_to_le16(IEEE80211_STYPE_CTS):
1754 stats->ctrl[CONTROL_CTS]++;
1755 break;
1756 case cpu_to_le16(IEEE80211_STYPE_ACK):
1757 stats->ctrl[CONTROL_ACK]++;
1758 break;
1759 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1760 stats->ctrl[CONTROL_CFEND]++;
1761 break;
1762 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1763 stats->ctrl[CONTROL_CFENDACK]++;
1764 break;
1765 }
1766 } else {
1767 /* data */
1768 stats->data_cnt++;
1769 stats->data_bytes += len;
1770 }
1771 iwl_leds_background(priv);
1772 }
1773 EXPORT_SYMBOL(iwl_update_stats);
1774 #endif
1775
1776 static void iwl_force_rf_reset(struct iwl_priv *priv)
1777 {
1778 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1779 return;
1780
1781 if (!iwl_is_any_associated(priv)) {
1782 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1783 return;
1784 }
1785 /*
1786 * There is no easy and better way to force reset the radio,
1787 * the only known method is switching channel which will force to
1788 * reset and tune the radio.
1789 * Use internal short scan (single channel) operation to should
1790 * achieve this objective.
1791 * Driver should reset the radio when number of consecutive missed
1792 * beacon, or any other uCode error condition detected.
1793 */
1794 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1795 iwl_internal_short_hw_scan(priv);
1796 }
1797
1798
1799 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1800 {
1801 struct iwl_force_reset *force_reset;
1802
1803 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1804 return -EINVAL;
1805
1806 if (mode >= IWL_MAX_FORCE_RESET) {
1807 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1808 return -EINVAL;
1809 }
1810 force_reset = &priv->force_reset[mode];
1811 force_reset->reset_request_count++;
1812 if (!external) {
1813 if (force_reset->last_force_reset_jiffies &&
1814 time_after(force_reset->last_force_reset_jiffies +
1815 force_reset->reset_duration, jiffies)) {
1816 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1817 force_reset->reset_reject_count++;
1818 return -EAGAIN;
1819 }
1820 }
1821 force_reset->reset_success_count++;
1822 force_reset->last_force_reset_jiffies = jiffies;
1823 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1824 switch (mode) {
1825 case IWL_RF_RESET:
1826 iwl_force_rf_reset(priv);
1827 break;
1828 case IWL_FW_RESET:
1829 /*
1830 * if the request is from external(ex: debugfs),
1831 * then always perform the request in regardless the module
1832 * parameter setting
1833 * if the request is from internal (uCode error or driver
1834 * detect failure), then fw_restart module parameter
1835 * need to be check before performing firmware reload
1836 */
1837 if (!external && !priv->cfg->mod_params->restart_fw) {
1838 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1839 "module parameter setting\n");
1840 break;
1841 }
1842 IWL_ERR(priv, "On demand firmware reload\n");
1843 /* Set the FW error flag -- cleared on iwl_down */
1844 set_bit(STATUS_FW_ERROR, &priv->status);
1845 wake_up_interruptible(&priv->wait_command_queue);
1846 /*
1847 * Keep the restart process from trying to send host
1848 * commands by clearing the INIT status bit
1849 */
1850 clear_bit(STATUS_READY, &priv->status);
1851 queue_work(priv->workqueue, &priv->restart);
1852 break;
1853 }
1854 return 0;
1855 }
1856
1857 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1858 enum nl80211_iftype newtype, bool newp2p)
1859 {
1860 struct iwl_priv *priv = hw->priv;
1861 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1862 struct iwl_rxon_context *tmp;
1863 u32 interface_modes;
1864 int err;
1865
1866 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1867
1868 mutex_lock(&priv->mutex);
1869
1870 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1871
1872 if (!(interface_modes & BIT(newtype))) {
1873 err = -EBUSY;
1874 goto out;
1875 }
1876
1877 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1878 for_each_context(priv, tmp) {
1879 if (ctx == tmp)
1880 continue;
1881
1882 if (!tmp->vif)
1883 continue;
1884
1885 /*
1886 * The current mode switch would be exclusive, but
1887 * another context is active ... refuse the switch.
1888 */
1889 err = -EBUSY;
1890 goto out;
1891 }
1892 }
1893
1894 /* success */
1895 iwl_teardown_interface(priv, vif, true);
1896 vif->type = newtype;
1897 err = iwl_setup_interface(priv, ctx);
1898 WARN_ON(err);
1899 /*
1900 * We've switched internally, but submitting to the
1901 * device may have failed for some reason. Mask this
1902 * error, because otherwise mac80211 will not switch
1903 * (and set the interface type back) and we'll be
1904 * out of sync with it.
1905 */
1906 err = 0;
1907
1908 out:
1909 mutex_unlock(&priv->mutex);
1910 return err;
1911 }
1912 EXPORT_SYMBOL(iwl_mac_change_interface);
1913
1914 /*
1915 * On every watchdog tick we check (latest) time stamp. If it does not
1916 * change during timeout period and queue is not empty we reset firmware.
1917 */
1918 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1919 {
1920 struct iwl_tx_queue *txq = &priv->txq[cnt];
1921 struct iwl_queue *q = &txq->q;
1922 unsigned long timeout;
1923 int ret;
1924
1925 if (q->read_ptr == q->write_ptr) {
1926 txq->time_stamp = jiffies;
1927 return 0;
1928 }
1929
1930 timeout = txq->time_stamp +
1931 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1932
1933 if (time_after(jiffies, timeout)) {
1934 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1935 q->id, priv->cfg->base_params->wd_timeout);
1936 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1937 return (ret == -EAGAIN) ? 0 : 1;
1938 }
1939
1940 return 0;
1941 }
1942
1943 /*
1944 * Making watchdog tick be a quarter of timeout assure we will
1945 * discover the queue hung between timeout and 1.25*timeout
1946 */
1947 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1948
1949 /*
1950 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1951 * we reset the firmware. If everything is fine just rearm the timer.
1952 */
1953 void iwl_bg_watchdog(unsigned long data)
1954 {
1955 struct iwl_priv *priv = (struct iwl_priv *)data;
1956 int cnt;
1957 unsigned long timeout;
1958
1959 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1960 return;
1961
1962 timeout = priv->cfg->base_params->wd_timeout;
1963 if (timeout == 0)
1964 return;
1965
1966 /* monitor and check for stuck cmd queue */
1967 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1968 return;
1969
1970 /* monitor and check for other stuck queues */
1971 if (iwl_is_any_associated(priv)) {
1972 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1973 /* skip as we already checked the command queue */
1974 if (cnt == priv->cmd_queue)
1975 continue;
1976 if (iwl_check_stuck_queue(priv, cnt))
1977 return;
1978 }
1979 }
1980
1981 mod_timer(&priv->watchdog, jiffies +
1982 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1983 }
1984 EXPORT_SYMBOL(iwl_bg_watchdog);
1985
1986 void iwl_setup_watchdog(struct iwl_priv *priv)
1987 {
1988 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1989
1990 if (timeout)
1991 mod_timer(&priv->watchdog,
1992 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1993 else
1994 del_timer(&priv->watchdog);
1995 }
1996 EXPORT_SYMBOL(iwl_setup_watchdog);
1997
1998 /*
1999 * extended beacon time format
2000 * time in usec will be changed into a 32-bit value in extended:internal format
2001 * the extended part is the beacon counts
2002 * the internal part is the time in usec within one beacon interval
2003 */
2004 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2005 {
2006 u32 quot;
2007 u32 rem;
2008 u32 interval = beacon_interval * TIME_UNIT;
2009
2010 if (!interval || !usec)
2011 return 0;
2012
2013 quot = (usec / interval) &
2014 (iwl_beacon_time_mask_high(priv,
2015 priv->hw_params.beacon_time_tsf_bits) >>
2016 priv->hw_params.beacon_time_tsf_bits);
2017 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2018 priv->hw_params.beacon_time_tsf_bits);
2019
2020 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2021 }
2022 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2023
2024 /* base is usually what we get from ucode with each received frame,
2025 * the same as HW timer counter counting down
2026 */
2027 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2028 u32 addon, u32 beacon_interval)
2029 {
2030 u32 base_low = base & iwl_beacon_time_mask_low(priv,
2031 priv->hw_params.beacon_time_tsf_bits);
2032 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2033 priv->hw_params.beacon_time_tsf_bits);
2034 u32 interval = beacon_interval * TIME_UNIT;
2035 u32 res = (base & iwl_beacon_time_mask_high(priv,
2036 priv->hw_params.beacon_time_tsf_bits)) +
2037 (addon & iwl_beacon_time_mask_high(priv,
2038 priv->hw_params.beacon_time_tsf_bits));
2039
2040 if (base_low > addon_low)
2041 res += base_low - addon_low;
2042 else if (base_low < addon_low) {
2043 res += interval + base_low - addon_low;
2044 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2045 } else
2046 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2047
2048 return cpu_to_le32(res);
2049 }
2050 EXPORT_SYMBOL(iwl_add_beacon_time);
2051
2052 #ifdef CONFIG_PM
2053
2054 int iwl_pci_suspend(struct device *device)
2055 {
2056 struct pci_dev *pdev = to_pci_dev(device);
2057 struct iwl_priv *priv = pci_get_drvdata(pdev);
2058
2059 /*
2060 * This function is called when system goes into suspend state
2061 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2062 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2063 * it will not call apm_ops.stop() to stop the DMA operation.
2064 * Calling apm_ops.stop here to make sure we stop the DMA.
2065 */
2066 iwl_apm_stop(priv);
2067
2068 return 0;
2069 }
2070 EXPORT_SYMBOL(iwl_pci_suspend);
2071
2072 int iwl_pci_resume(struct device *device)
2073 {
2074 struct pci_dev *pdev = to_pci_dev(device);
2075 struct iwl_priv *priv = pci_get_drvdata(pdev);
2076 bool hw_rfkill = false;
2077
2078 /*
2079 * We disable the RETRY_TIMEOUT register (0x41) to keep
2080 * PCI Tx retries from interfering with C3 CPU state.
2081 */
2082 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2083
2084 iwl_enable_interrupts(priv);
2085
2086 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2087 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2088 hw_rfkill = true;
2089
2090 if (hw_rfkill)
2091 set_bit(STATUS_RF_KILL_HW, &priv->status);
2092 else
2093 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2094
2095 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2096
2097 return 0;
2098 }
2099 EXPORT_SYMBOL(iwl_pci_resume);
2100
2101 const struct dev_pm_ops iwl_pm_ops = {
2102 .suspend = iwl_pci_suspend,
2103 .resume = iwl_pci_resume,
2104 .freeze = iwl_pci_suspend,
2105 .thaw = iwl_pci_resume,
2106 .poweroff = iwl_pci_suspend,
2107 .restore = iwl_pci_resume,
2108 };
2109 EXPORT_SYMBOL(iwl_pm_ops);
2110
2111 #endif /* CONFIG_PM */
linux-next