iwlwifi: legacy tx_cmd_protection function
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
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         IWL_ERR(priv, "Loaded firmware version: %s\n",
961                 priv->hw->wiphy->fw_version);
962
963         priv->cfg->ops->lib->dump_nic_error_log(priv);
964         if (priv->cfg->ops->lib->dump_csr)
965                 priv->cfg->ops->lib->dump_csr(priv);
966         if (priv->cfg->ops->lib->dump_fh)
967                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
968         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
969 #ifdef CONFIG_IWLWIFI_DEBUG
970         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
971                 iwl_print_rx_config_cmd(priv,
972                                         &priv->contexts[IWL_RXON_CTX_BSS]);
973 #endif
974
975         wake_up_interruptible(&priv->wait_command_queue);
976
977         /* Keep the restart process from trying to send host
978          * commands by clearing the INIT status bit */
979         clear_bit(STATUS_READY, &priv->status);
980
981         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
982                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
983                           "Restarting adapter due to uCode error.\n");
984
985                 if (priv->cfg->mod_params->restart_fw)
986                         queue_work(priv->workqueue, &priv->restart);
987         }
988 }
989 EXPORT_SYMBOL(iwl_irq_handle_error);
990
991 static int iwl_apm_stop_master(struct iwl_priv *priv)
992 {
993         int ret = 0;
994
995         /* stop device's busmaster DMA activity */
996         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
997
998         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
999                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1000         if (ret)
1001                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1002
1003         IWL_DEBUG_INFO(priv, "stop master\n");
1004
1005         return ret;
1006 }
1007
1008 void iwl_apm_stop(struct iwl_priv *priv)
1009 {
1010         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1011
1012         /* Stop device's DMA activity */
1013         iwl_apm_stop_master(priv);
1014
1015         /* Reset the entire device */
1016         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1017
1018         udelay(10);
1019
1020         /*
1021          * Clear "initialization complete" bit to move adapter from
1022          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1023          */
1024         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1025 }
1026 EXPORT_SYMBOL(iwl_apm_stop);
1027
1028
1029 /*
1030  * Start up NIC's basic functionality after it has been reset
1031  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1032  * NOTE:  This does not load uCode nor start the embedded processor
1033  */
1034 int iwl_apm_init(struct iwl_priv *priv)
1035 {
1036         int ret = 0;
1037         u16 lctl;
1038
1039         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1040
1041         /*
1042          * Use "set_bit" below rather than "write", to preserve any hardware
1043          * bits already set by default after reset.
1044          */
1045
1046         /* Disable L0S exit timer (platform NMI Work/Around) */
1047         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1048                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1049
1050         /*
1051          * Disable L0s without affecting L1;
1052          *  don't wait for ICH L0s (ICH bug W/A)
1053          */
1054         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1055                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1056
1057         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1058         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1059
1060         /*
1061          * Enable HAP INTA (interrupt from management bus) to
1062          * wake device's PCI Express link L1a -> L0s
1063          * NOTE:  This is no-op for 3945 (non-existant bit)
1064          */
1065         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1066                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1067
1068         /*
1069          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1070          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1071          * If so (likely), disable L0S, so device moves directly L0->L1;
1072          *    costs negligible amount of power savings.
1073          * If not (unlikely), enable L0S, so there is at least some
1074          *    power savings, even without L1.
1075          */
1076         if (priv->cfg->base_params->set_l0s) {
1077                 lctl = iwl_pcie_link_ctl(priv);
1078                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1079                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1080                         /* L1-ASPM enabled; disable(!) L0S  */
1081                         iwl_set_bit(priv, CSR_GIO_REG,
1082                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1083                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1084                 } else {
1085                         /* L1-ASPM disabled; enable(!) L0S */
1086                         iwl_clear_bit(priv, CSR_GIO_REG,
1087                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1088                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1089                 }
1090         }
1091
1092         /* Configure analog phase-lock-loop before activating to D0A */
1093         if (priv->cfg->base_params->pll_cfg_val)
1094                 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1095                             priv->cfg->base_params->pll_cfg_val);
1096
1097         /*
1098          * Set "initialization complete" bit to move adapter from
1099          * D0U* --> D0A* (powered-up active) state.
1100          */
1101         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1102
1103         /*
1104          * Wait for clock stabilization; once stabilized, access to
1105          * device-internal resources is supported, e.g. iwl_write_prph()
1106          * and accesses to uCode SRAM.
1107          */
1108         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1109                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1110                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1111         if (ret < 0) {
1112                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1113                 goto out;
1114         }
1115
1116         /*
1117          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1118          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1119          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1120          * and don't need BSM to restore data after power-saving sleep.
1121          *
1122          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1123          * do not disable clocks.  This preserves any hardware bits already
1124          * set by default in "CLK_CTRL_REG" after reset.
1125          */
1126         if (priv->cfg->base_params->use_bsm)
1127                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1128                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1129         else
1130                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1131                         APMG_CLK_VAL_DMA_CLK_RQT);
1132         udelay(20);
1133
1134         /* Disable L1-Active */
1135         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1136                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1137
1138 out:
1139         return ret;
1140 }
1141 EXPORT_SYMBOL(iwl_apm_init);
1142
1143
1144 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1145 {
1146         int ret;
1147         s8 prev_tx_power;
1148
1149         lockdep_assert_held(&priv->mutex);
1150
1151         if (priv->tx_power_user_lmt == tx_power && !force)
1152                 return 0;
1153
1154         if (!priv->cfg->ops->lib->send_tx_power)
1155                 return -EOPNOTSUPP;
1156
1157         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1158                 IWL_WARN(priv,
1159                          "Requested user TXPOWER %d below lower limit %d.\n",
1160                          tx_power,
1161                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1162                 return -EINVAL;
1163         }
1164
1165         if (tx_power > priv->tx_power_device_lmt) {
1166                 IWL_WARN(priv,
1167                         "Requested user TXPOWER %d above upper limit %d.\n",
1168                          tx_power, priv->tx_power_device_lmt);
1169                 return -EINVAL;
1170         }
1171
1172         if (!iwl_is_ready_rf(priv))
1173                 return -EIO;
1174
1175         /* scan complete use tx_power_next, need to be updated */
1176         priv->tx_power_next = tx_power;
1177         if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
1178                 IWL_DEBUG_INFO(priv, "Deferring tx power set while scanning\n");
1179                 return 0;
1180         }
1181
1182         prev_tx_power = priv->tx_power_user_lmt;
1183         priv->tx_power_user_lmt = tx_power;
1184
1185         ret = priv->cfg->ops->lib->send_tx_power(priv);
1186
1187         /* if fail to set tx_power, restore the orig. tx power */
1188         if (ret) {
1189                 priv->tx_power_user_lmt = prev_tx_power;
1190                 priv->tx_power_next = prev_tx_power;
1191         }
1192         return ret;
1193 }
1194 EXPORT_SYMBOL(iwl_set_tx_power);
1195
1196 void iwl_send_bt_config(struct iwl_priv *priv)
1197 {
1198         struct iwl_bt_cmd bt_cmd = {
1199                 .lead_time = BT_LEAD_TIME_DEF,
1200                 .max_kill = BT_MAX_KILL_DEF,
1201                 .kill_ack_mask = 0,
1202                 .kill_cts_mask = 0,
1203         };
1204
1205         if (!bt_coex_active)
1206                 bt_cmd.flags = BT_COEX_DISABLE;
1207         else
1208                 bt_cmd.flags = BT_COEX_ENABLE;
1209
1210         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1211                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1212
1213         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1214                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1215                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1216 }
1217 EXPORT_SYMBOL(iwl_send_bt_config);
1218
1219 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1220 {
1221         struct iwl_statistics_cmd statistics_cmd = {
1222                 .configuration_flags =
1223                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1224         };
1225
1226         if (flags & CMD_ASYNC)
1227                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1228                                                sizeof(struct iwl_statistics_cmd),
1229                                                &statistics_cmd, NULL);
1230         else
1231                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1232                                         sizeof(struct iwl_statistics_cmd),
1233                                         &statistics_cmd);
1234 }
1235 EXPORT_SYMBOL(iwl_send_statistics_request);
1236
1237 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1238                            struct iwl_rx_mem_buffer *rxb)
1239 {
1240 #ifdef CONFIG_IWLWIFI_DEBUG
1241         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1242         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1243         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1244                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1245 #endif
1246 }
1247 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1248
1249 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1250                                       struct iwl_rx_mem_buffer *rxb)
1251 {
1252         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1253         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1254         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1255                         "notification for %s:\n", len,
1256                         get_cmd_string(pkt->hdr.cmd));
1257         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1258 }
1259 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1260
1261 void iwl_rx_reply_error(struct iwl_priv *priv,
1262                         struct iwl_rx_mem_buffer *rxb)
1263 {
1264         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1265
1266         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1267                 "seq 0x%04X ser 0x%08X\n",
1268                 le32_to_cpu(pkt->u.err_resp.error_type),
1269                 get_cmd_string(pkt->u.err_resp.cmd_id),
1270                 pkt->u.err_resp.cmd_id,
1271                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1272                 le32_to_cpu(pkt->u.err_resp.error_info));
1273 }
1274 EXPORT_SYMBOL(iwl_rx_reply_error);
1275
1276 void iwl_clear_isr_stats(struct iwl_priv *priv)
1277 {
1278         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1279 }
1280
1281 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1282                            const struct ieee80211_tx_queue_params *params)
1283 {
1284         struct iwl_priv *priv = hw->priv;
1285         struct iwl_rxon_context *ctx;
1286         unsigned long flags;
1287         int q;
1288
1289         IWL_DEBUG_MAC80211(priv, "enter\n");
1290
1291         if (!iwl_is_ready_rf(priv)) {
1292                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1293                 return -EIO;
1294         }
1295
1296         if (queue >= AC_NUM) {
1297                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1298                 return 0;
1299         }
1300
1301         q = AC_NUM - 1 - queue;
1302
1303         spin_lock_irqsave(&priv->lock, flags);
1304
1305         /*
1306          * MULTI-FIXME
1307          * This may need to be done per interface in nl80211/cfg80211/mac80211.
1308          */
1309         for_each_context(priv, ctx) {
1310                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1311                         cpu_to_le16(params->cw_min);
1312                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1313                         cpu_to_le16(params->cw_max);
1314                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1315                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1316                                 cpu_to_le16((params->txop * 32));
1317
1318                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1319         }
1320
1321         spin_unlock_irqrestore(&priv->lock, flags);
1322
1323         IWL_DEBUG_MAC80211(priv, "leave\n");
1324         return 0;
1325 }
1326 EXPORT_SYMBOL(iwl_mac_conf_tx);
1327
1328 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1329 {
1330         struct iwl_priv *priv = hw->priv;
1331
1332         return priv->ibss_manager == IWL_IBSS_MANAGER;
1333 }
1334 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1335
1336 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1337 {
1338         iwl_connection_init_rx_config(priv, ctx);
1339
1340         if (priv->cfg->ops->hcmd->set_rxon_chain)
1341                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1342
1343         return iwlcore_commit_rxon(priv, ctx);
1344 }
1345
1346 static int iwl_setup_interface(struct iwl_priv *priv,
1347                                struct iwl_rxon_context *ctx)
1348 {
1349         struct ieee80211_vif *vif = ctx->vif;
1350         int err;
1351
1352         lockdep_assert_held(&priv->mutex);
1353
1354         /*
1355          * This variable will be correct only when there's just
1356          * a single context, but all code using it is for hardware
1357          * that supports only one context.
1358          */
1359         priv->iw_mode = vif->type;
1360
1361         ctx->is_active = true;
1362
1363         err = iwl_set_mode(priv, ctx);
1364         if (err) {
1365                 if (!ctx->always_active)
1366                         ctx->is_active = false;
1367                 return err;
1368         }
1369
1370         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1371             vif->type == NL80211_IFTYPE_ADHOC) {
1372                 /*
1373                  * pretend to have high BT traffic as long as we
1374                  * are operating in IBSS mode, as this will cause
1375                  * the rate scaling etc. to behave as intended.
1376                  */
1377                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1378         }
1379
1380         return 0;
1381 }
1382
1383 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1384 {
1385         struct iwl_priv *priv = hw->priv;
1386         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1387         struct iwl_rxon_context *tmp, *ctx = NULL;
1388         int err;
1389
1390         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1391                            vif->type, vif->addr);
1392
1393         mutex_lock(&priv->mutex);
1394
1395         if (!iwl_is_ready_rf(priv)) {
1396                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1397                 err = -EINVAL;
1398                 goto out;
1399         }
1400
1401         for_each_context(priv, tmp) {
1402                 u32 possible_modes =
1403                         tmp->interface_modes | tmp->exclusive_interface_modes;
1404
1405                 if (tmp->vif) {
1406                         /* check if this busy context is exclusive */
1407                         if (tmp->exclusive_interface_modes &
1408                                                 BIT(tmp->vif->type)) {
1409                                 err = -EINVAL;
1410                                 goto out;
1411                         }
1412                         continue;
1413                 }
1414
1415                 if (!(possible_modes & BIT(vif->type)))
1416                         continue;
1417
1418                 /* have maybe usable context w/o interface */
1419                 ctx = tmp;
1420                 break;
1421         }
1422
1423         if (!ctx) {
1424                 err = -EOPNOTSUPP;
1425                 goto out;
1426         }
1427
1428         vif_priv->ctx = ctx;
1429         ctx->vif = vif;
1430
1431         err = iwl_setup_interface(priv, ctx);
1432         if (!err)
1433                 goto out;
1434
1435         ctx->vif = NULL;
1436         priv->iw_mode = NL80211_IFTYPE_STATION;
1437  out:
1438         mutex_unlock(&priv->mutex);
1439
1440         IWL_DEBUG_MAC80211(priv, "leave\n");
1441         return err;
1442 }
1443 EXPORT_SYMBOL(iwl_mac_add_interface);
1444
1445 static void iwl_teardown_interface(struct iwl_priv *priv,
1446                                    struct ieee80211_vif *vif,
1447                                    bool mode_change)
1448 {
1449         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1450
1451         lockdep_assert_held(&priv->mutex);
1452
1453         if (priv->scan_vif == vif) {
1454                 iwl_scan_cancel_timeout(priv, 200);
1455                 iwl_force_scan_end(priv);
1456         }
1457
1458         if (!mode_change) {
1459                 iwl_set_mode(priv, ctx);
1460                 if (!ctx->always_active)
1461                         ctx->is_active = false;
1462         }
1463
1464         /*
1465          * When removing the IBSS interface, overwrite the
1466          * BT traffic load with the stored one from the last
1467          * notification, if any. If this is a device that
1468          * doesn't implement this, this has no effect since
1469          * both values are the same and zero.
1470          */
1471         if (vif->type == NL80211_IFTYPE_ADHOC)
1472                 priv->bt_traffic_load = priv->notif_bt_traffic_load;
1473 }
1474
1475 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1476                               struct ieee80211_vif *vif)
1477 {
1478         struct iwl_priv *priv = hw->priv;
1479         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1480
1481         IWL_DEBUG_MAC80211(priv, "enter\n");
1482
1483         mutex_lock(&priv->mutex);
1484
1485         WARN_ON(ctx->vif != vif);
1486         ctx->vif = NULL;
1487
1488         iwl_teardown_interface(priv, vif, false);
1489
1490         memset(priv->bssid, 0, ETH_ALEN);
1491         mutex_unlock(&priv->mutex);
1492
1493         IWL_DEBUG_MAC80211(priv, "leave\n");
1494
1495 }
1496 EXPORT_SYMBOL(iwl_mac_remove_interface);
1497
1498 int iwl_alloc_txq_mem(struct iwl_priv *priv)
1499 {
1500         if (!priv->txq)
1501                 priv->txq = kzalloc(
1502                         sizeof(struct iwl_tx_queue) *
1503                                 priv->cfg->base_params->num_of_queues,
1504                         GFP_KERNEL);
1505         if (!priv->txq) {
1506                 IWL_ERR(priv, "Not enough memory for txq\n");
1507                 return -ENOMEM;
1508         }
1509         return 0;
1510 }
1511 EXPORT_SYMBOL(iwl_alloc_txq_mem);
1512
1513 void iwl_free_txq_mem(struct iwl_priv *priv)
1514 {
1515         kfree(priv->txq);
1516         priv->txq = NULL;
1517 }
1518 EXPORT_SYMBOL(iwl_free_txq_mem);
1519
1520 #ifdef CONFIG_IWLWIFI_DEBUGFS
1521
1522 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1523
1524 void iwl_reset_traffic_log(struct iwl_priv *priv)
1525 {
1526         priv->tx_traffic_idx = 0;
1527         priv->rx_traffic_idx = 0;
1528         if (priv->tx_traffic)
1529                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1530         if (priv->rx_traffic)
1531                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1532 }
1533
1534 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1535 {
1536         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1537
1538         if (iwl_debug_level & IWL_DL_TX) {
1539                 if (!priv->tx_traffic) {
1540                         priv->tx_traffic =
1541                                 kzalloc(traffic_size, GFP_KERNEL);
1542                         if (!priv->tx_traffic)
1543                                 return -ENOMEM;
1544                 }
1545         }
1546         if (iwl_debug_level & IWL_DL_RX) {
1547                 if (!priv->rx_traffic) {
1548                         priv->rx_traffic =
1549                                 kzalloc(traffic_size, GFP_KERNEL);
1550                         if (!priv->rx_traffic)
1551                                 return -ENOMEM;
1552                 }
1553         }
1554         iwl_reset_traffic_log(priv);
1555         return 0;
1556 }
1557 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
1558
1559 void iwl_free_traffic_mem(struct iwl_priv *priv)
1560 {
1561         kfree(priv->tx_traffic);
1562         priv->tx_traffic = NULL;
1563
1564         kfree(priv->rx_traffic);
1565         priv->rx_traffic = NULL;
1566 }
1567 EXPORT_SYMBOL(iwl_free_traffic_mem);
1568
1569 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1570                       u16 length, struct ieee80211_hdr *header)
1571 {
1572         __le16 fc;
1573         u16 len;
1574
1575         if (likely(!(iwl_debug_level & IWL_DL_TX)))
1576                 return;
1577
1578         if (!priv->tx_traffic)
1579                 return;
1580
1581         fc = header->frame_control;
1582         if (ieee80211_is_data(fc)) {
1583                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1584                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1585                 memcpy((priv->tx_traffic +
1586                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1587                        header, len);
1588                 priv->tx_traffic_idx =
1589                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1590         }
1591 }
1592 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
1593
1594 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1595                       u16 length, struct ieee80211_hdr *header)
1596 {
1597         __le16 fc;
1598         u16 len;
1599
1600         if (likely(!(iwl_debug_level & IWL_DL_RX)))
1601                 return;
1602
1603         if (!priv->rx_traffic)
1604                 return;
1605
1606         fc = header->frame_control;
1607         if (ieee80211_is_data(fc)) {
1608                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1609                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1610                 memcpy((priv->rx_traffic +
1611                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1612                        header, len);
1613                 priv->rx_traffic_idx =
1614                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1615         }
1616 }
1617 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
1618
1619 const char *get_mgmt_string(int cmd)
1620 {
1621         switch (cmd) {
1622                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1623                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1624                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1625                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1626                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1627                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1628                 IWL_CMD(MANAGEMENT_BEACON);
1629                 IWL_CMD(MANAGEMENT_ATIM);
1630                 IWL_CMD(MANAGEMENT_DISASSOC);
1631                 IWL_CMD(MANAGEMENT_AUTH);
1632                 IWL_CMD(MANAGEMENT_DEAUTH);
1633                 IWL_CMD(MANAGEMENT_ACTION);
1634         default:
1635                 return "UNKNOWN";
1636
1637         }
1638 }
1639
1640 const char *get_ctrl_string(int cmd)
1641 {
1642         switch (cmd) {
1643                 IWL_CMD(CONTROL_BACK_REQ);
1644                 IWL_CMD(CONTROL_BACK);
1645                 IWL_CMD(CONTROL_PSPOLL);
1646                 IWL_CMD(CONTROL_RTS);
1647                 IWL_CMD(CONTROL_CTS);
1648                 IWL_CMD(CONTROL_ACK);
1649                 IWL_CMD(CONTROL_CFEND);
1650                 IWL_CMD(CONTROL_CFENDACK);
1651         default:
1652                 return "UNKNOWN";
1653
1654         }
1655 }
1656
1657 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1658 {
1659         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1660         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1661         priv->led_tpt = 0;
1662 }
1663
1664 /*
1665  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1666  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1667  * Use debugFs to display the rx/rx_statistics
1668  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1669  * information will be recorded, but DATA pkt still will be recorded
1670  * for the reason of iwl_led.c need to control the led blinking based on
1671  * number of tx and rx data.
1672  *
1673  */
1674 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1675 {
1676         struct traffic_stats    *stats;
1677
1678         if (is_tx)
1679                 stats = &priv->tx_stats;
1680         else
1681                 stats = &priv->rx_stats;
1682
1683         if (ieee80211_is_mgmt(fc)) {
1684                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1685                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1686                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1687                         break;
1688                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1689                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1690                         break;
1691                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1692                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1693                         break;
1694                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1695                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1696                         break;
1697                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1698                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1699                         break;
1700                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1701                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1702                         break;
1703                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1704                         stats->mgmt[MANAGEMENT_BEACON]++;
1705                         break;
1706                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1707                         stats->mgmt[MANAGEMENT_ATIM]++;
1708                         break;
1709                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1710                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1711                         break;
1712                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1713                         stats->mgmt[MANAGEMENT_AUTH]++;
1714                         break;
1715                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1716                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1717                         break;
1718                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1719                         stats->mgmt[MANAGEMENT_ACTION]++;
1720                         break;
1721                 }
1722         } else if (ieee80211_is_ctl(fc)) {
1723                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1724                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1725                         stats->ctrl[CONTROL_BACK_REQ]++;
1726                         break;
1727                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1728                         stats->ctrl[CONTROL_BACK]++;
1729                         break;
1730                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1731                         stats->ctrl[CONTROL_PSPOLL]++;
1732                         break;
1733                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1734                         stats->ctrl[CONTROL_RTS]++;
1735                         break;
1736                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1737                         stats->ctrl[CONTROL_CTS]++;
1738                         break;
1739                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1740                         stats->ctrl[CONTROL_ACK]++;
1741                         break;
1742                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1743                         stats->ctrl[CONTROL_CFEND]++;
1744                         break;
1745                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1746                         stats->ctrl[CONTROL_CFENDACK]++;
1747                         break;
1748                 }
1749         } else {
1750                 /* data */
1751                 stats->data_cnt++;
1752                 stats->data_bytes += len;
1753         }
1754         iwl_leds_background(priv);
1755 }
1756 EXPORT_SYMBOL(iwl_update_stats);
1757 #endif
1758
1759 static void iwl_force_rf_reset(struct iwl_priv *priv)
1760 {
1761         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1762                 return;
1763
1764         if (!iwl_is_any_associated(priv)) {
1765                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1766                 return;
1767         }
1768         /*
1769          * There is no easy and better way to force reset the radio,
1770          * the only known method is switching channel which will force to
1771          * reset and tune the radio.
1772          * Use internal short scan (single channel) operation to should
1773          * achieve this objective.
1774          * Driver should reset the radio when number of consecutive missed
1775          * beacon, or any other uCode error condition detected.
1776          */
1777         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1778         iwl_internal_short_hw_scan(priv);
1779 }
1780
1781
1782 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1783 {
1784         struct iwl_force_reset *force_reset;
1785
1786         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1787                 return -EINVAL;
1788
1789         if (mode >= IWL_MAX_FORCE_RESET) {
1790                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1791                 return -EINVAL;
1792         }
1793         force_reset = &priv->force_reset[mode];
1794         force_reset->reset_request_count++;
1795         if (!external) {
1796                 if (force_reset->last_force_reset_jiffies &&
1797                     time_after(force_reset->last_force_reset_jiffies +
1798                     force_reset->reset_duration, jiffies)) {
1799                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1800                         force_reset->reset_reject_count++;
1801                         return -EAGAIN;
1802                 }
1803         }
1804         force_reset->reset_success_count++;
1805         force_reset->last_force_reset_jiffies = jiffies;
1806         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1807         switch (mode) {
1808         case IWL_RF_RESET:
1809                 iwl_force_rf_reset(priv);
1810                 break;
1811         case IWL_FW_RESET:
1812                 /*
1813                  * if the request is from external(ex: debugfs),
1814                  * then always perform the request in regardless the module
1815                  * parameter setting
1816                  * if the request is from internal (uCode error or driver
1817                  * detect failure), then fw_restart module parameter
1818                  * need to be check before performing firmware reload
1819                  */
1820                 if (!external && !priv->cfg->mod_params->restart_fw) {
1821                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1822                                        "module parameter setting\n");
1823                         break;
1824                 }
1825                 IWL_ERR(priv, "On demand firmware reload\n");
1826                 /* Set the FW error flag -- cleared on iwl_down */
1827                 set_bit(STATUS_FW_ERROR, &priv->status);
1828                 wake_up_interruptible(&priv->wait_command_queue);
1829                 /*
1830                  * Keep the restart process from trying to send host
1831                  * commands by clearing the INIT status bit
1832                  */
1833                 clear_bit(STATUS_READY, &priv->status);
1834                 queue_work(priv->workqueue, &priv->restart);
1835                 break;
1836         }
1837         return 0;
1838 }
1839
1840 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1841                              enum nl80211_iftype newtype, bool newp2p)
1842 {
1843         struct iwl_priv *priv = hw->priv;
1844         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1845         struct iwl_rxon_context *tmp;
1846         u32 interface_modes;
1847         int err;
1848
1849         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1850
1851         mutex_lock(&priv->mutex);
1852
1853         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1854
1855         if (!(interface_modes & BIT(newtype))) {
1856                 err = -EBUSY;
1857                 goto out;
1858         }
1859
1860         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1861                 for_each_context(priv, tmp) {
1862                         if (ctx == tmp)
1863                                 continue;
1864
1865                         if (!tmp->vif)
1866                                 continue;
1867
1868                         /*
1869                          * The current mode switch would be exclusive, but
1870                          * another context is active ... refuse the switch.
1871                          */
1872                         err = -EBUSY;
1873                         goto out;
1874                 }
1875         }
1876
1877         /* success */
1878         iwl_teardown_interface(priv, vif, true);
1879         vif->type = newtype;
1880         err = iwl_setup_interface(priv, ctx);
1881         WARN_ON(err);
1882         /*
1883          * We've switched internally, but submitting to the
1884          * device may have failed for some reason. Mask this
1885          * error, because otherwise mac80211 will not switch
1886          * (and set the interface type back) and we'll be
1887          * out of sync with it.
1888          */
1889         err = 0;
1890
1891  out:
1892         mutex_unlock(&priv->mutex);
1893         return err;
1894 }
1895 EXPORT_SYMBOL(iwl_mac_change_interface);
1896
1897 /**
1898  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
1899  *
1900  * During normal condition (no queue is stuck), the timer is continually set to
1901  * execute every monitor_recover_period milliseconds after the last timer
1902  * expired.  When the queue read_ptr is at the same place, the timer is
1903  * shorten to 100mSecs.  This is
1904  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
1905  *      2) to detect the stuck queues quicker before the station and AP can
1906  *      disassociate each other.
1907  *
1908  * This function monitors all the tx queues and recover from it if any
1909  * of the queues are stuck.
1910  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
1911  *      it will recover by resetting the firmware and return.
1912  * 2. Then, it checks for station association.  If it associates it will check
1913  *      other queues.  If any queue is stuck, it will recover by resetting
1914  *      the firmware.
1915  * Note: It the number of times the queue read_ptr to be at the same place to
1916  *      be MAX_REPEAT+1 in order to consider to be stuck.
1917  */
1918 /*
1919  * The maximum number of times the read pointer of the tx queue at the
1920  * same place without considering to be stuck.
1921  */
1922 #define MAX_REPEAT      (2)
1923 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1924 {
1925         struct iwl_tx_queue *txq;
1926         struct iwl_queue *q;
1927
1928         txq = &priv->txq[cnt];
1929         q = &txq->q;
1930         /* queue is empty, skip */
1931         if (q->read_ptr == q->write_ptr)
1932                 return 0;
1933
1934         if (q->read_ptr == q->last_read_ptr) {
1935                 /* a queue has not been read from last time */
1936                 if (q->repeat_same_read_ptr > MAX_REPEAT) {
1937                         IWL_ERR(priv,
1938                                 "queue %d stuck %d time. Fw reload.\n",
1939                                 q->id, q->repeat_same_read_ptr);
1940                         q->repeat_same_read_ptr = 0;
1941                         iwl_force_reset(priv, IWL_FW_RESET, false);
1942                 } else {
1943                         q->repeat_same_read_ptr++;
1944                         IWL_DEBUG_RADIO(priv,
1945                                         "queue %d, not read %d time\n",
1946                                         q->id,
1947                                         q->repeat_same_read_ptr);
1948                         mod_timer(&priv->monitor_recover,
1949                                 jiffies + msecs_to_jiffies(
1950                                 IWL_ONE_HUNDRED_MSECS));
1951                         return 1;
1952                 }
1953         } else {
1954                 q->last_read_ptr = q->read_ptr;
1955                 q->repeat_same_read_ptr = 0;
1956         }
1957         return 0;
1958 }
1959
1960 void iwl_bg_monitor_recover(unsigned long data)
1961 {
1962         struct iwl_priv *priv = (struct iwl_priv *)data;
1963         int cnt;
1964
1965         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1966                 return;
1967
1968         /* monitor and check for stuck cmd queue */
1969         if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1970                 return;
1971
1972         /* monitor and check for other stuck queues */
1973         if (iwl_is_any_associated(priv)) {
1974                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1975                         /* skip as we already checked the command queue */
1976                         if (cnt == priv->cmd_queue)
1977                                 continue;
1978                         if (iwl_check_stuck_queue(priv, cnt))
1979                                 return;
1980                 }
1981         }
1982         if (priv->cfg->base_params->monitor_recover_period) {
1983                 /*
1984                  * Reschedule the timer to occur in
1985                  * priv->cfg->base_params->monitor_recover_period
1986                  */
1987                 mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
1988                           priv->cfg->base_params->monitor_recover_period));
1989         }
1990 }
1991 EXPORT_SYMBOL(iwl_bg_monitor_recover);
1992
1993
1994 /*
1995  * extended beacon time format
1996  * time in usec will be changed into a 32-bit value in extended:internal format
1997  * the extended part is the beacon counts
1998  * the internal part is the time in usec within one beacon interval
1999  */
2000 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2001 {
2002         u32 quot;
2003         u32 rem;
2004         u32 interval = beacon_interval * TIME_UNIT;
2005
2006         if (!interval || !usec)
2007                 return 0;
2008
2009         quot = (usec / interval) &
2010                 (iwl_beacon_time_mask_high(priv,
2011                 priv->hw_params.beacon_time_tsf_bits) >>
2012                 priv->hw_params.beacon_time_tsf_bits);
2013         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2014                                    priv->hw_params.beacon_time_tsf_bits);
2015
2016         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2017 }
2018 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2019
2020 /* base is usually what we get from ucode with each received frame,
2021  * the same as HW timer counter counting down
2022  */
2023 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2024                            u32 addon, u32 beacon_interval)
2025 {
2026         u32 base_low = base & iwl_beacon_time_mask_low(priv,
2027                                         priv->hw_params.beacon_time_tsf_bits);
2028         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2029                                         priv->hw_params.beacon_time_tsf_bits);
2030         u32 interval = beacon_interval * TIME_UNIT;
2031         u32 res = (base & iwl_beacon_time_mask_high(priv,
2032                                 priv->hw_params.beacon_time_tsf_bits)) +
2033                                 (addon & iwl_beacon_time_mask_high(priv,
2034                                 priv->hw_params.beacon_time_tsf_bits));
2035
2036         if (base_low > addon_low)
2037                 res += base_low - addon_low;
2038         else if (base_low < addon_low) {
2039                 res += interval + base_low - addon_low;
2040                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2041         } else
2042                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2043
2044         return cpu_to_le32(res);
2045 }
2046 EXPORT_SYMBOL(iwl_add_beacon_time);
2047
2048 #ifdef CONFIG_PM
2049
2050 int iwl_pci_suspend(struct device *device)
2051 {
2052         struct pci_dev *pdev = to_pci_dev(device);
2053         struct iwl_priv *priv = pci_get_drvdata(pdev);
2054
2055         /*
2056          * This function is called when system goes into suspend state
2057          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2058          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2059          * it will not call apm_ops.stop() to stop the DMA operation.
2060          * Calling apm_ops.stop here to make sure we stop the DMA.
2061          */
2062         iwl_apm_stop(priv);
2063
2064         return 0;
2065 }
2066 EXPORT_SYMBOL(iwl_pci_suspend);
2067
2068 int iwl_pci_resume(struct device *device)
2069 {
2070         struct pci_dev *pdev = to_pci_dev(device);
2071         struct iwl_priv *priv = pci_get_drvdata(pdev);
2072         bool hw_rfkill = false;
2073
2074         /*
2075          * We disable the RETRY_TIMEOUT register (0x41) to keep
2076          * PCI Tx retries from interfering with C3 CPU state.
2077          */
2078         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2079
2080         iwl_enable_interrupts(priv);
2081
2082         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2083                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2084                 hw_rfkill = true;
2085
2086         if (hw_rfkill)
2087                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2088         else
2089                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2090
2091         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2092
2093         return 0;
2094 }
2095 EXPORT_SYMBOL(iwl_pci_resume);
2096
2097 const struct dev_pm_ops iwl_pm_ops = {
2098         .suspend = iwl_pci_suspend,
2099         .resume = iwl_pci_resume,
2100         .freeze = iwl_pci_suspend,
2101         .thaw = iwl_pci_resume,
2102         .poweroff = iwl_pci_suspend,
2103         .restore = iwl_pci_resume,
2104 };
2105 EXPORT_SYMBOL(iwl_pm_ops);
2106
2107 #endif /* CONFIG_PM */