Merge branch 'master' of git://git.infradead.org/users/linville/wireless into for...
[pandora-kernel.git] / drivers / net / wireless / iwlegacy / iwl-core.c
1 /******************************************************************************
2  *
3  * GPL LICENSE SUMMARY
4  *
5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of version 2 of the GNU General Public License as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19  * USA
20  *
21  * The full GNU General Public License is included in this distribution
22  * in the file called LICENSE.GPL.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h"
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-legacy: common functions for 3945 and 4965");
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 static bool bt_coex_active = true;
68 module_param(bt_coex_active, bool, S_IRUGO);
69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
70
71 u32 iwlegacy_debug_level;
72 EXPORT_SYMBOL(iwlegacy_debug_level);
73
74 const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
75 EXPORT_SYMBOL(iwlegacy_bcast_addr);
76
77
78 /* This function both allocates and initializes hw and priv. */
79 struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
80 {
81         struct iwl_priv *priv;
82         /* mac80211 allocates memory for this device instance, including
83          *   space for this driver's private structure */
84         struct ieee80211_hw *hw;
85
86         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
87                                 cfg->ops->ieee80211_ops);
88         if (hw == NULL) {
89                 pr_err("%s: Can not allocate network device\n",
90                        cfg->name);
91                 goto out;
92         }
93
94         priv = hw->priv;
95         priv->hw = hw;
96
97 out:
98         return hw;
99 }
100 EXPORT_SYMBOL(iwl_legacy_alloc_all);
101
102 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
103 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
104 static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
105                               struct ieee80211_sta_ht_cap *ht_info,
106                               enum ieee80211_band band)
107 {
108         u16 max_bit_rate = 0;
109         u8 rx_chains_num = priv->hw_params.rx_chains_num;
110         u8 tx_chains_num = priv->hw_params.tx_chains_num;
111
112         ht_info->cap = 0;
113         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
114
115         ht_info->ht_supported = true;
116
117         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
118         max_bit_rate = MAX_BIT_RATE_20_MHZ;
119         if (priv->hw_params.ht40_channel & BIT(band)) {
120                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
121                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
122                 ht_info->mcs.rx_mask[4] = 0x01;
123                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
124         }
125
126         if (priv->cfg->mod_params->amsdu_size_8K)
127                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
128
129         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
130         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
131
132         ht_info->mcs.rx_mask[0] = 0xFF;
133         if (rx_chains_num >= 2)
134                 ht_info->mcs.rx_mask[1] = 0xFF;
135         if (rx_chains_num >= 3)
136                 ht_info->mcs.rx_mask[2] = 0xFF;
137
138         /* Highest supported Rx data rate */
139         max_bit_rate *= rx_chains_num;
140         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
141         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
142
143         /* Tx MCS capabilities */
144         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
145         if (tx_chains_num != rx_chains_num) {
146                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
147                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
148                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
149         }
150 }
151
152 /**
153  * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
154  */
155 int iwl_legacy_init_geos(struct iwl_priv *priv)
156 {
157         struct iwl_channel_info *ch;
158         struct ieee80211_supported_band *sband;
159         struct ieee80211_channel *channels;
160         struct ieee80211_channel *geo_ch;
161         struct ieee80211_rate *rates;
162         int i = 0;
163         s8 max_tx_power = 0;
164
165         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
166             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
167                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
168                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
169                 return 0;
170         }
171
172         channels = kzalloc(sizeof(struct ieee80211_channel) *
173                            priv->channel_count, GFP_KERNEL);
174         if (!channels)
175                 return -ENOMEM;
176
177         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
178                         GFP_KERNEL);
179         if (!rates) {
180                 kfree(channels);
181                 return -ENOMEM;
182         }
183
184         /* 5.2GHz channels start after the 2.4GHz channels */
185         sband = &priv->bands[IEEE80211_BAND_5GHZ];
186         sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
187         /* just OFDM */
188         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
189         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
190
191         if (priv->cfg->sku & IWL_SKU_N)
192                 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
193                                          IEEE80211_BAND_5GHZ);
194
195         sband = &priv->bands[IEEE80211_BAND_2GHZ];
196         sband->channels = channels;
197         /* OFDM & CCK */
198         sband->bitrates = rates;
199         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
200
201         if (priv->cfg->sku & IWL_SKU_N)
202                 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
203                                          IEEE80211_BAND_2GHZ);
204
205         priv->ieee_channels = channels;
206         priv->ieee_rates = rates;
207
208         for (i = 0;  i < priv->channel_count; i++) {
209                 ch = &priv->channel_info[i];
210
211                 if (!iwl_legacy_is_channel_valid(ch))
212                         continue;
213
214                 sband = &priv->bands[ch->band];
215
216                 geo_ch = &sband->channels[sband->n_channels++];
217
218                 geo_ch->center_freq =
219                         ieee80211_channel_to_frequency(ch->channel, ch->band);
220                 geo_ch->max_power = ch->max_power_avg;
221                 geo_ch->max_antenna_gain = 0xff;
222                 geo_ch->hw_value = ch->channel;
223
224                 if (iwl_legacy_is_channel_valid(ch)) {
225                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
226                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
227
228                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
229                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
230
231                         if (ch->flags & EEPROM_CHANNEL_RADAR)
232                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
233
234                         geo_ch->flags |= ch->ht40_extension_channel;
235
236                         if (ch->max_power_avg > max_tx_power)
237                                 max_tx_power = ch->max_power_avg;
238                 } else {
239                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
240                 }
241
242                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
243                                 ch->channel, geo_ch->center_freq,
244                                 iwl_legacy_is_channel_a_band(ch) ?  "5.2" : "2.4",
245                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
246                                 "restricted" : "valid",
247                                  geo_ch->flags);
248         }
249
250         priv->tx_power_device_lmt = max_tx_power;
251         priv->tx_power_user_lmt = max_tx_power;
252         priv->tx_power_next = max_tx_power;
253
254         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
255              priv->cfg->sku & IWL_SKU_A) {
256                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
257                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
258                            priv->pci_dev->device,
259                            priv->pci_dev->subsystem_device);
260                 priv->cfg->sku &= ~IWL_SKU_A;
261         }
262
263         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
264                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
265                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
266
267         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
268
269         return 0;
270 }
271 EXPORT_SYMBOL(iwl_legacy_init_geos);
272
273 /*
274  * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
275  */
276 void iwl_legacy_free_geos(struct iwl_priv *priv)
277 {
278         kfree(priv->ieee_channels);
279         kfree(priv->ieee_rates);
280         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
281 }
282 EXPORT_SYMBOL(iwl_legacy_free_geos);
283
284 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
285                                      enum ieee80211_band band,
286                                      u16 channel, u8 extension_chan_offset)
287 {
288         const struct iwl_channel_info *ch_info;
289
290         ch_info = iwl_legacy_get_channel_info(priv, band, channel);
291         if (!iwl_legacy_is_channel_valid(ch_info))
292                 return false;
293
294         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
295                 return !(ch_info->ht40_extension_channel &
296                                         IEEE80211_CHAN_NO_HT40PLUS);
297         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
298                 return !(ch_info->ht40_extension_channel &
299                                         IEEE80211_CHAN_NO_HT40MINUS);
300
301         return false;
302 }
303
304 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
305                             struct iwl_rxon_context *ctx,
306                             struct ieee80211_sta_ht_cap *ht_cap)
307 {
308         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
309                 return false;
310
311         /*
312          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
313          * the bit will not set if it is pure 40MHz case
314          */
315         if (ht_cap && !ht_cap->ht_supported)
316                 return false;
317
318 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
319         if (priv->disable_ht40)
320                 return false;
321 #endif
322
323         return iwl_legacy_is_channel_extension(priv, priv->band,
324                         le16_to_cpu(ctx->staging.channel),
325                         ctx->ht.extension_chan_offset);
326 }
327 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
328
329 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
330 {
331         u16 new_val;
332         u16 beacon_factor;
333
334         /*
335          * If mac80211 hasn't given us a beacon interval, program
336          * the default into the device.
337          */
338         if (!beacon_val)
339                 return DEFAULT_BEACON_INTERVAL;
340
341         /*
342          * If the beacon interval we obtained from the peer
343          * is too large, we'll have to wake up more often
344          * (and in IBSS case, we'll beacon too much)
345          *
346          * For example, if max_beacon_val is 4096, and the
347          * requested beacon interval is 7000, we'll have to
348          * use 3500 to be able to wake up on the beacons.
349          *
350          * This could badly influence beacon detection stats.
351          */
352
353         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
354         new_val = beacon_val / beacon_factor;
355
356         if (!new_val)
357                 new_val = max_beacon_val;
358
359         return new_val;
360 }
361
362 int
363 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
364 {
365         u64 tsf;
366         s32 interval_tm, rem;
367         struct ieee80211_conf *conf = NULL;
368         u16 beacon_int;
369         struct ieee80211_vif *vif = ctx->vif;
370
371         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
372
373         lockdep_assert_held(&priv->mutex);
374
375         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
376
377         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
378         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
379
380         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
381
382         /*
383          * TODO: For IBSS we need to get atim_window from mac80211,
384          *       for now just always use 0
385          */
386         ctx->timing.atim_window = 0;
387
388         beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
389                         priv->hw_params.max_beacon_itrvl * TIME_UNIT);
390         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
391
392         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
393         interval_tm = beacon_int * TIME_UNIT;
394         rem = do_div(tsf, interval_tm);
395         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
396
397         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
398
399         IWL_DEBUG_ASSOC(priv,
400                         "beacon interval %d beacon timer %d beacon tim %d\n",
401                         le16_to_cpu(ctx->timing.beacon_interval),
402                         le32_to_cpu(ctx->timing.beacon_init_val),
403                         le16_to_cpu(ctx->timing.atim_window));
404
405         return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
406                                 sizeof(ctx->timing), &ctx->timing);
407 }
408 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
409
410 void
411 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
412                                 struct iwl_rxon_context *ctx,
413                                 int hw_decrypt)
414 {
415         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
416
417         if (hw_decrypt)
418                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
419         else
420                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
421
422 }
423 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
424
425 /* validate RXON structure is valid */
426 int
427 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
428 {
429         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
430         bool error = false;
431
432         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
433                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
434                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
435                         error = true;
436                 }
437                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
438                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
439                         error = true;
440                 }
441         } else {
442                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
443                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
444                         error = true;
445                 }
446                 if (rxon->flags & RXON_FLG_CCK_MSK) {
447                         IWL_WARN(priv, "check 5.2G: CCK!\n");
448                         error = true;
449                 }
450         }
451         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
452                 IWL_WARN(priv, "mac/bssid mcast!\n");
453                 error = true;
454         }
455
456         /* make sure basic rates 6Mbps and 1Mbps are supported */
457         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
458             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
459                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
460                 error = true;
461         }
462
463         if (le16_to_cpu(rxon->assoc_id) > 2007) {
464                 IWL_WARN(priv, "aid > 2007\n");
465                 error = true;
466         }
467
468         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
469                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
470                 IWL_WARN(priv, "CCK and short slot\n");
471                 error = true;
472         }
473
474         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
475                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
476                 IWL_WARN(priv, "CCK and auto detect");
477                 error = true;
478         }
479
480         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
481                             RXON_FLG_TGG_PROTECT_MSK)) ==
482                             RXON_FLG_TGG_PROTECT_MSK) {
483                 IWL_WARN(priv, "TGg but no auto-detect\n");
484                 error = true;
485         }
486
487         if (error)
488                 IWL_WARN(priv, "Tuning to channel %d\n",
489                             le16_to_cpu(rxon->channel));
490
491         if (error) {
492                 IWL_ERR(priv, "Invalid RXON\n");
493                 return -EINVAL;
494         }
495         return 0;
496 }
497 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
498
499 /**
500  * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
501  * @priv: staging_rxon is compared to active_rxon
502  *
503  * If the RXON structure is changing enough to require a new tune,
504  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
505  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
506  */
507 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
508                            struct iwl_rxon_context *ctx)
509 {
510         const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
511         const struct iwl_legacy_rxon_cmd *active = &ctx->active;
512
513 #define CHK(cond)                                                       \
514         if ((cond)) {                                                   \
515                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
516                 return 1;                                               \
517         }
518
519 #define CHK_NEQ(c1, c2)                                         \
520         if ((c1) != (c2)) {                                     \
521                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
522                                #c1 " != " #c2 " - %d != %d\n",  \
523                                (c1), (c2));                     \
524                 return 1;                                       \
525         }
526
527         /* These items are only settable from the full RXON command */
528         CHK(!iwl_legacy_is_associated_ctx(ctx));
529         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
530         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
531         CHK(compare_ether_addr(staging->wlap_bssid_addr,
532                                 active->wlap_bssid_addr));
533         CHK_NEQ(staging->dev_type, active->dev_type);
534         CHK_NEQ(staging->channel, active->channel);
535         CHK_NEQ(staging->air_propagation, active->air_propagation);
536         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
537                 active->ofdm_ht_single_stream_basic_rates);
538         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
539                 active->ofdm_ht_dual_stream_basic_rates);
540         CHK_NEQ(staging->assoc_id, active->assoc_id);
541
542         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
543          * be updated with the RXON_ASSOC command -- however only some
544          * flag transitions are allowed using RXON_ASSOC */
545
546         /* Check if we are not switching bands */
547         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
548                 active->flags & RXON_FLG_BAND_24G_MSK);
549
550         /* Check if we are switching association toggle */
551         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
552                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
553
554 #undef CHK
555 #undef CHK_NEQ
556
557         return 0;
558 }
559 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
560
561 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
562                             struct iwl_rxon_context *ctx)
563 {
564         /*
565          * Assign the lowest rate -- should really get this from
566          * the beacon skb from mac80211.
567          */
568         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
569                 return IWL_RATE_1M_PLCP;
570         else
571                 return IWL_RATE_6M_PLCP;
572 }
573 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
574
575 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
576                              struct iwl_ht_config *ht_conf,
577                              struct iwl_rxon_context *ctx)
578 {
579         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
580
581         if (!ctx->ht.enabled) {
582                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
583                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
584                         RXON_FLG_HT40_PROT_MSK |
585                         RXON_FLG_HT_PROT_MSK);
586                 return;
587         }
588
589         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
590                                         RXON_FLG_HT_OPERATING_MODE_POS);
591
592         /* Set up channel bandwidth:
593          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
594         /* clear the HT channel mode before set the mode */
595         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
596                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
597         if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
598                 /* pure ht40 */
599                 if (ctx->ht.protection ==
600                                 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
601                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
602                         /* Note: control channel is opposite of extension channel */
603                         switch (ctx->ht.extension_chan_offset) {
604                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
605                                 rxon->flags &=
606                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
607                                 break;
608                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
609                                 rxon->flags |=
610                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
611                                 break;
612                         }
613                 } else {
614                         /* Note: control channel is opposite of extension channel */
615                         switch (ctx->ht.extension_chan_offset) {
616                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
617                                 rxon->flags &=
618                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
619                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
620                                 break;
621                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
622                                 rxon->flags |=
623                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
624                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
625                                 break;
626                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
627                         default:
628                                 /* channel location only valid if in Mixed mode */
629                                 IWL_ERR(priv,
630                                         "invalid extension channel offset\n");
631                                 break;
632                         }
633                 }
634         } else {
635                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
636         }
637
638         if (priv->cfg->ops->hcmd->set_rxon_chain)
639                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
640
641         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
642                         "extension channel offset 0x%x\n",
643                         le32_to_cpu(rxon->flags), ctx->ht.protection,
644                         ctx->ht.extension_chan_offset);
645 }
646
647 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
648 {
649         struct iwl_rxon_context *ctx;
650
651         for_each_context(priv, ctx)
652                 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
653 }
654 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
655
656 /* Return valid, unused, channel for a passive scan to reset the RF */
657 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
658                                  enum ieee80211_band band)
659 {
660         const struct iwl_channel_info *ch_info;
661         int i;
662         u8 channel = 0;
663         u8 min, max;
664         struct iwl_rxon_context *ctx;
665
666         if (band == IEEE80211_BAND_5GHZ) {
667                 min = 14;
668                 max = priv->channel_count;
669         } else {
670                 min = 0;
671                 max = 14;
672         }
673
674         for (i = min; i < max; i++) {
675                 bool busy = false;
676
677                 for_each_context(priv, ctx) {
678                         busy = priv->channel_info[i].channel ==
679                                 le16_to_cpu(ctx->staging.channel);
680                         if (busy)
681                                 break;
682                 }
683
684                 if (busy)
685                         continue;
686
687                 channel = priv->channel_info[i].channel;
688                 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
689                 if (iwl_legacy_is_channel_valid(ch_info))
690                         break;
691         }
692
693         return channel;
694 }
695 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
696
697 /**
698  * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
699  * @ch: requested channel as a pointer to struct ieee80211_channel
700
701  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
702  * in the staging RXON flag structure based on the ch->band
703  */
704 int
705 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
706                          struct iwl_rxon_context *ctx)
707 {
708         enum ieee80211_band band = ch->band;
709         u16 channel = ch->hw_value;
710
711         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
712             (priv->band == band))
713                 return 0;
714
715         ctx->staging.channel = cpu_to_le16(channel);
716         if (band == IEEE80211_BAND_5GHZ)
717                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
718         else
719                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
720
721         priv->band = band;
722
723         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
724
725         return 0;
726 }
727 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
728
729 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
730                             struct iwl_rxon_context *ctx,
731                             enum ieee80211_band band,
732                             struct ieee80211_vif *vif)
733 {
734         if (band == IEEE80211_BAND_5GHZ) {
735                 ctx->staging.flags &=
736                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
737                       | RXON_FLG_CCK_MSK);
738                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
739         } else {
740                 /* Copied from iwl_post_associate() */
741                 if (vif && vif->bss_conf.use_short_slot)
742                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
743                 else
744                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
745
746                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
747                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
748                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
749         }
750 }
751 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
752
753 /*
754  * initialize rxon structure with default values from eeprom
755  */
756 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
757                                    struct iwl_rxon_context *ctx)
758 {
759         const struct iwl_channel_info *ch_info;
760
761         memset(&ctx->staging, 0, sizeof(ctx->staging));
762
763         if (!ctx->vif) {
764                 ctx->staging.dev_type = ctx->unused_devtype;
765         } else
766         switch (ctx->vif->type) {
767
768         case NL80211_IFTYPE_STATION:
769                 ctx->staging.dev_type = ctx->station_devtype;
770                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
771                 break;
772
773         case NL80211_IFTYPE_ADHOC:
774                 ctx->staging.dev_type = ctx->ibss_devtype;
775                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
776                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
777                                                   RXON_FILTER_ACCEPT_GRP_MSK;
778                 break;
779
780         default:
781                 IWL_ERR(priv, "Unsupported interface type %d\n",
782                         ctx->vif->type);
783                 break;
784         }
785
786 #if 0
787         /* TODO:  Figure out when short_preamble would be set and cache from
788          * that */
789         if (!hw_to_local(priv->hw)->short_preamble)
790                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
791         else
792                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
793 #endif
794
795         ch_info = iwl_legacy_get_channel_info(priv, priv->band,
796                                        le16_to_cpu(ctx->active.channel));
797
798         if (!ch_info)
799                 ch_info = &priv->channel_info[0];
800
801         ctx->staging.channel = cpu_to_le16(ch_info->channel);
802         priv->band = ch_info->band;
803
804         iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
805
806         ctx->staging.ofdm_basic_rates =
807             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
808         ctx->staging.cck_basic_rates =
809             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
810
811         /* clear both MIX and PURE40 mode flag */
812         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
813                                         RXON_FLG_CHANNEL_MODE_PURE_40);
814         if (ctx->vif)
815                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
816
817         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
818         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
819 }
820 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
821
822 void iwl_legacy_set_rate(struct iwl_priv *priv)
823 {
824         const struct ieee80211_supported_band *hw = NULL;
825         struct ieee80211_rate *rate;
826         struct iwl_rxon_context *ctx;
827         int i;
828
829         hw = iwl_get_hw_mode(priv, priv->band);
830         if (!hw) {
831                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
832                 return;
833         }
834
835         priv->active_rate = 0;
836
837         for (i = 0; i < hw->n_bitrates; i++) {
838                 rate = &(hw->bitrates[i]);
839                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
840                         priv->active_rate |= (1 << rate->hw_value);
841         }
842
843         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
844
845         for_each_context(priv, ctx) {
846                 ctx->staging.cck_basic_rates =
847                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
848
849                 ctx->staging.ofdm_basic_rates =
850                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
851         }
852 }
853 EXPORT_SYMBOL(iwl_legacy_set_rate);
854
855 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
856 {
857         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
858
859         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
860                 return;
861
862         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
863                 ieee80211_chswitch_done(ctx->vif, is_success);
864 }
865 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
866
867 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
868 {
869         struct iwl_rx_packet *pkt = rxb_addr(rxb);
870         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
871
872         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
873         struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
874
875         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
876                 return;
877
878         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
879                 rxon->channel = csa->channel;
880                 ctx->staging.channel = csa->channel;
881                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
882                               le16_to_cpu(csa->channel));
883                 iwl_legacy_chswitch_done(priv, true);
884         } else {
885                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
886                         le16_to_cpu(csa->channel));
887                 iwl_legacy_chswitch_done(priv, false);
888         }
889 }
890 EXPORT_SYMBOL(iwl_legacy_rx_csa);
891
892 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
893 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
894                              struct iwl_rxon_context *ctx)
895 {
896         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
897
898         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
899         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
900         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
901                                 le16_to_cpu(rxon->channel));
902         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
903         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
904                                 le32_to_cpu(rxon->filter_flags));
905         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
906         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
907                         rxon->ofdm_basic_rates);
908         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
909                                 rxon->cck_basic_rates);
910         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
911         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
912         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
913                                 le16_to_cpu(rxon->assoc_id));
914 }
915 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
916 #endif
917 /**
918  * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
919  */
920 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
921 {
922         /* Set the FW error flag -- cleared on iwl_down */
923         set_bit(STATUS_FW_ERROR, &priv->status);
924
925         /* Cancel currently queued command. */
926         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
927
928         IWL_ERR(priv, "Loaded firmware version: %s\n",
929                 priv->hw->wiphy->fw_version);
930
931         priv->cfg->ops->lib->dump_nic_error_log(priv);
932         if (priv->cfg->ops->lib->dump_fh)
933                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
934 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
935         if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
936                 iwl_legacy_print_rx_config_cmd(priv,
937                                         &priv->contexts[IWL_RXON_CTX_BSS]);
938 #endif
939
940         wake_up(&priv->wait_command_queue);
941
942         /* Keep the restart process from trying to send host
943          * commands by clearing the INIT status bit */
944         clear_bit(STATUS_READY, &priv->status);
945
946         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
947                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
948                           "Restarting adapter due to uCode error.\n");
949
950                 if (priv->cfg->mod_params->restart_fw)
951                         queue_work(priv->workqueue, &priv->restart);
952         }
953 }
954 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
955
956 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
957 {
958         int ret = 0;
959
960         /* stop device's busmaster DMA activity */
961         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
962
963         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
964                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
965         if (ret)
966                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
967
968         IWL_DEBUG_INFO(priv, "stop master\n");
969
970         return ret;
971 }
972
973 void iwl_legacy_apm_stop(struct iwl_priv *priv)
974 {
975         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
976
977         /* Stop device's DMA activity */
978         iwl_legacy_apm_stop_master(priv);
979
980         /* Reset the entire device */
981         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
982
983         udelay(10);
984
985         /*
986          * Clear "initialization complete" bit to move adapter from
987          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
988          */
989         iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
990                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
991 }
992 EXPORT_SYMBOL(iwl_legacy_apm_stop);
993
994
995 /*
996  * Start up NIC's basic functionality after it has been reset
997  * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
998  * NOTE:  This does not load uCode nor start the embedded processor
999  */
1000 int iwl_legacy_apm_init(struct iwl_priv *priv)
1001 {
1002         int ret = 0;
1003         u16 lctl;
1004
1005         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1006
1007         /*
1008          * Use "set_bit" below rather than "write", to preserve any hardware
1009          * bits already set by default after reset.
1010          */
1011
1012         /* Disable L0S exit timer (platform NMI Work/Around) */
1013         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1014                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1015
1016         /*
1017          * Disable L0s without affecting L1;
1018          *  don't wait for ICH L0s (ICH bug W/A)
1019          */
1020         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1021                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1022
1023         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1024         iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1025                                         CSR_DBG_HPET_MEM_REG_VAL);
1026
1027         /*
1028          * Enable HAP INTA (interrupt from management bus) to
1029          * wake device's PCI Express link L1a -> L0s
1030          * NOTE:  This is no-op for 3945 (non-existent bit)
1031          */
1032         iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1033                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1034
1035         /*
1036          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1037          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1038          * If so (likely), disable L0S, so device moves directly L0->L1;
1039          *    costs negligible amount of power savings.
1040          * If not (unlikely), enable L0S, so there is at least some
1041          *    power savings, even without L1.
1042          */
1043         if (priv->cfg->base_params->set_l0s) {
1044                 lctl = iwl_legacy_pcie_link_ctl(priv);
1045                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1046                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1047                         /* L1-ASPM enabled; disable(!) L0S  */
1048                         iwl_legacy_set_bit(priv, CSR_GIO_REG,
1049                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1050                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1051                 } else {
1052                         /* L1-ASPM disabled; enable(!) L0S */
1053                         iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1054                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1055                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1056                 }
1057         }
1058
1059         /* Configure analog phase-lock-loop before activating to D0A */
1060         if (priv->cfg->base_params->pll_cfg_val)
1061                 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1062                             priv->cfg->base_params->pll_cfg_val);
1063
1064         /*
1065          * Set "initialization complete" bit to move adapter from
1066          * D0U* --> D0A* (powered-up active) state.
1067          */
1068         iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1069
1070         /*
1071          * Wait for clock stabilization; once stabilized, access to
1072          * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1073          * and accesses to uCode SRAM.
1074          */
1075         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1076                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1077                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1078         if (ret < 0) {
1079                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1080                 goto out;
1081         }
1082
1083         /*
1084          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1085          * BSM (Boostrap State Machine) is only in 3945 and 4965.
1086          *
1087          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1088          * do not disable clocks.  This preserves any hardware bits already
1089          * set by default in "CLK_CTRL_REG" after reset.
1090          */
1091         if (priv->cfg->base_params->use_bsm)
1092                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1093                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1094         else
1095                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1096                         APMG_CLK_VAL_DMA_CLK_RQT);
1097         udelay(20);
1098
1099         /* Disable L1-Active */
1100         iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1101                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1102
1103 out:
1104         return ret;
1105 }
1106 EXPORT_SYMBOL(iwl_legacy_apm_init);
1107
1108
1109 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1110 {
1111         int ret;
1112         s8 prev_tx_power;
1113         bool defer;
1114         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1115
1116         lockdep_assert_held(&priv->mutex);
1117
1118         if (priv->tx_power_user_lmt == tx_power && !force)
1119                 return 0;
1120
1121         if (!priv->cfg->ops->lib->send_tx_power)
1122                 return -EOPNOTSUPP;
1123
1124         /* 0 dBm mean 1 milliwatt */
1125         if (tx_power < 0) {
1126                 IWL_WARN(priv,
1127                          "Requested user TXPOWER %d below 1 mW.\n",
1128                          tx_power);
1129                 return -EINVAL;
1130         }
1131
1132         if (tx_power > priv->tx_power_device_lmt) {
1133                 IWL_WARN(priv,
1134                         "Requested user TXPOWER %d above upper limit %d.\n",
1135                          tx_power, priv->tx_power_device_lmt);
1136                 return -EINVAL;
1137         }
1138
1139         if (!iwl_legacy_is_ready_rf(priv))
1140                 return -EIO;
1141
1142         /* scan complete and commit_rxon use tx_power_next value,
1143          * it always need to be updated for newest request */
1144         priv->tx_power_next = tx_power;
1145
1146         /* do not set tx power when scanning or channel changing */
1147         defer = test_bit(STATUS_SCANNING, &priv->status) ||
1148                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1149         if (defer && !force) {
1150                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1151                 return 0;
1152         }
1153
1154         prev_tx_power = priv->tx_power_user_lmt;
1155         priv->tx_power_user_lmt = tx_power;
1156
1157         ret = priv->cfg->ops->lib->send_tx_power(priv);
1158
1159         /* if fail to set tx_power, restore the orig. tx power */
1160         if (ret) {
1161                 priv->tx_power_user_lmt = prev_tx_power;
1162                 priv->tx_power_next = prev_tx_power;
1163         }
1164         return ret;
1165 }
1166 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1167
1168 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1169 {
1170         struct iwl_bt_cmd bt_cmd = {
1171                 .lead_time = BT_LEAD_TIME_DEF,
1172                 .max_kill = BT_MAX_KILL_DEF,
1173                 .kill_ack_mask = 0,
1174                 .kill_cts_mask = 0,
1175         };
1176
1177         if (!bt_coex_active)
1178                 bt_cmd.flags = BT_COEX_DISABLE;
1179         else
1180                 bt_cmd.flags = BT_COEX_ENABLE;
1181
1182         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1183                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1184
1185         if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1186                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1187                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1188 }
1189 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1190
1191 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1192 {
1193         struct iwl_statistics_cmd statistics_cmd = {
1194                 .configuration_flags =
1195                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1196         };
1197
1198         if (flags & CMD_ASYNC)
1199                 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1200                                         sizeof(struct iwl_statistics_cmd),
1201                                         &statistics_cmd, NULL);
1202         else
1203                 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1204                                         sizeof(struct iwl_statistics_cmd),
1205                                         &statistics_cmd);
1206 }
1207 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1208
1209 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1210                            struct iwl_rx_mem_buffer *rxb)
1211 {
1212 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1213         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1214         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1215         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1216                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1217 #endif
1218 }
1219 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1220
1221 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1222                                       struct iwl_rx_mem_buffer *rxb)
1223 {
1224         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1225         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1226         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1227                         "notification for %s:\n", len,
1228                         iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1229         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1230 }
1231 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1232
1233 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1234                         struct iwl_rx_mem_buffer *rxb)
1235 {
1236         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1237
1238         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1239                 "seq 0x%04X ser 0x%08X\n",
1240                 le32_to_cpu(pkt->u.err_resp.error_type),
1241                 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1242                 pkt->u.err_resp.cmd_id,
1243                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1244                 le32_to_cpu(pkt->u.err_resp.error_info));
1245 }
1246 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1247
1248 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1249 {
1250         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1251 }
1252
1253 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1254                            const struct ieee80211_tx_queue_params *params)
1255 {
1256         struct iwl_priv *priv = hw->priv;
1257         struct iwl_rxon_context *ctx;
1258         unsigned long flags;
1259         int q;
1260
1261         IWL_DEBUG_MAC80211(priv, "enter\n");
1262
1263         if (!iwl_legacy_is_ready_rf(priv)) {
1264                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1265                 return -EIO;
1266         }
1267
1268         if (queue >= AC_NUM) {
1269                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1270                 return 0;
1271         }
1272
1273         q = AC_NUM - 1 - queue;
1274
1275         spin_lock_irqsave(&priv->lock, flags);
1276
1277         for_each_context(priv, ctx) {
1278                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1279                         cpu_to_le16(params->cw_min);
1280                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1281                         cpu_to_le16(params->cw_max);
1282                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1283                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1284                                 cpu_to_le16((params->txop * 32));
1285
1286                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1287         }
1288
1289         spin_unlock_irqrestore(&priv->lock, flags);
1290
1291         IWL_DEBUG_MAC80211(priv, "leave\n");
1292         return 0;
1293 }
1294 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1295
1296 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1297 {
1298         struct iwl_priv *priv = hw->priv;
1299
1300         return priv->ibss_manager == IWL_IBSS_MANAGER;
1301 }
1302 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1303
1304 static int
1305 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1306 {
1307         iwl_legacy_connection_init_rx_config(priv, ctx);
1308
1309         if (priv->cfg->ops->hcmd->set_rxon_chain)
1310                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1311
1312         return iwl_legacy_commit_rxon(priv, ctx);
1313 }
1314
1315 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1316                                struct iwl_rxon_context *ctx)
1317 {
1318         struct ieee80211_vif *vif = ctx->vif;
1319         int err;
1320
1321         lockdep_assert_held(&priv->mutex);
1322
1323         /*
1324          * This variable will be correct only when there's just
1325          * a single context, but all code using it is for hardware
1326          * that supports only one context.
1327          */
1328         priv->iw_mode = vif->type;
1329
1330         ctx->is_active = true;
1331
1332         err = iwl_legacy_set_mode(priv, ctx);
1333         if (err) {
1334                 if (!ctx->always_active)
1335                         ctx->is_active = false;
1336                 return err;
1337         }
1338
1339         return 0;
1340 }
1341
1342 int
1343 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1344 {
1345         struct iwl_priv *priv = hw->priv;
1346         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1347         struct iwl_rxon_context *tmp, *ctx = NULL;
1348         int err;
1349
1350         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1351                            vif->type, vif->addr);
1352
1353         mutex_lock(&priv->mutex);
1354
1355         if (!iwl_legacy_is_ready_rf(priv)) {
1356                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1357                 err = -EINVAL;
1358                 goto out;
1359         }
1360
1361         for_each_context(priv, tmp) {
1362                 u32 possible_modes =
1363                         tmp->interface_modes | tmp->exclusive_interface_modes;
1364
1365                 if (tmp->vif) {
1366                         /* check if this busy context is exclusive */
1367                         if (tmp->exclusive_interface_modes &
1368                                                 BIT(tmp->vif->type)) {
1369                                 err = -EINVAL;
1370                                 goto out;
1371                         }
1372                         continue;
1373                 }
1374
1375                 if (!(possible_modes & BIT(vif->type)))
1376                         continue;
1377
1378                 /* have maybe usable context w/o interface */
1379                 ctx = tmp;
1380                 break;
1381         }
1382
1383         if (!ctx) {
1384                 err = -EOPNOTSUPP;
1385                 goto out;
1386         }
1387
1388         vif_priv->ctx = ctx;
1389         ctx->vif = vif;
1390
1391         err = iwl_legacy_setup_interface(priv, ctx);
1392         if (!err)
1393                 goto out;
1394
1395         ctx->vif = NULL;
1396         priv->iw_mode = NL80211_IFTYPE_STATION;
1397  out:
1398         mutex_unlock(&priv->mutex);
1399
1400         IWL_DEBUG_MAC80211(priv, "leave\n");
1401         return err;
1402 }
1403 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1404
1405 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1406                                    struct ieee80211_vif *vif,
1407                                    bool mode_change)
1408 {
1409         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1410
1411         lockdep_assert_held(&priv->mutex);
1412
1413         if (priv->scan_vif == vif) {
1414                 iwl_legacy_scan_cancel_timeout(priv, 200);
1415                 iwl_legacy_force_scan_end(priv);
1416         }
1417
1418         if (!mode_change) {
1419                 iwl_legacy_set_mode(priv, ctx);
1420                 if (!ctx->always_active)
1421                         ctx->is_active = false;
1422         }
1423 }
1424
1425 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1426                               struct ieee80211_vif *vif)
1427 {
1428         struct iwl_priv *priv = hw->priv;
1429         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1430
1431         IWL_DEBUG_MAC80211(priv, "enter\n");
1432
1433         mutex_lock(&priv->mutex);
1434
1435         WARN_ON(ctx->vif != vif);
1436         ctx->vif = NULL;
1437
1438         iwl_legacy_teardown_interface(priv, vif, false);
1439
1440         memset(priv->bssid, 0, ETH_ALEN);
1441         mutex_unlock(&priv->mutex);
1442
1443         IWL_DEBUG_MAC80211(priv, "leave\n");
1444
1445 }
1446 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1447
1448 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1449 {
1450         if (!priv->txq)
1451                 priv->txq = kzalloc(
1452                         sizeof(struct iwl_tx_queue) *
1453                                 priv->cfg->base_params->num_of_queues,
1454                         GFP_KERNEL);
1455         if (!priv->txq) {
1456                 IWL_ERR(priv, "Not enough memory for txq\n");
1457                 return -ENOMEM;
1458         }
1459         return 0;
1460 }
1461 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1462
1463 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1464 {
1465         kfree(priv->txq);
1466         priv->txq = NULL;
1467 }
1468 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1469
1470 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1471
1472 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1473
1474 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1475 {
1476         priv->tx_traffic_idx = 0;
1477         priv->rx_traffic_idx = 0;
1478         if (priv->tx_traffic)
1479                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1480         if (priv->rx_traffic)
1481                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1482 }
1483
1484 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1485 {
1486         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1487
1488         if (iwlegacy_debug_level & IWL_DL_TX) {
1489                 if (!priv->tx_traffic) {
1490                         priv->tx_traffic =
1491                                 kzalloc(traffic_size, GFP_KERNEL);
1492                         if (!priv->tx_traffic)
1493                                 return -ENOMEM;
1494                 }
1495         }
1496         if (iwlegacy_debug_level & IWL_DL_RX) {
1497                 if (!priv->rx_traffic) {
1498                         priv->rx_traffic =
1499                                 kzalloc(traffic_size, GFP_KERNEL);
1500                         if (!priv->rx_traffic)
1501                                 return -ENOMEM;
1502                 }
1503         }
1504         iwl_legacy_reset_traffic_log(priv);
1505         return 0;
1506 }
1507 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1508
1509 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1510 {
1511         kfree(priv->tx_traffic);
1512         priv->tx_traffic = NULL;
1513
1514         kfree(priv->rx_traffic);
1515         priv->rx_traffic = NULL;
1516 }
1517 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1518
1519 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1520                       u16 length, struct ieee80211_hdr *header)
1521 {
1522         __le16 fc;
1523         u16 len;
1524
1525         if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1526                 return;
1527
1528         if (!priv->tx_traffic)
1529                 return;
1530
1531         fc = header->frame_control;
1532         if (ieee80211_is_data(fc)) {
1533                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1534                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1535                 memcpy((priv->tx_traffic +
1536                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1537                        header, len);
1538                 priv->tx_traffic_idx =
1539                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1540         }
1541 }
1542 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1543
1544 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1545                       u16 length, struct ieee80211_hdr *header)
1546 {
1547         __le16 fc;
1548         u16 len;
1549
1550         if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1551                 return;
1552
1553         if (!priv->rx_traffic)
1554                 return;
1555
1556         fc = header->frame_control;
1557         if (ieee80211_is_data(fc)) {
1558                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1559                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1560                 memcpy((priv->rx_traffic +
1561                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1562                        header, len);
1563                 priv->rx_traffic_idx =
1564                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1565         }
1566 }
1567 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1568
1569 const char *iwl_legacy_get_mgmt_string(int cmd)
1570 {
1571         switch (cmd) {
1572                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1573                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1574                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1575                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1576                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1577                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1578                 IWL_CMD(MANAGEMENT_BEACON);
1579                 IWL_CMD(MANAGEMENT_ATIM);
1580                 IWL_CMD(MANAGEMENT_DISASSOC);
1581                 IWL_CMD(MANAGEMENT_AUTH);
1582                 IWL_CMD(MANAGEMENT_DEAUTH);
1583                 IWL_CMD(MANAGEMENT_ACTION);
1584         default:
1585                 return "UNKNOWN";
1586
1587         }
1588 }
1589
1590 const char *iwl_legacy_get_ctrl_string(int cmd)
1591 {
1592         switch (cmd) {
1593                 IWL_CMD(CONTROL_BACK_REQ);
1594                 IWL_CMD(CONTROL_BACK);
1595                 IWL_CMD(CONTROL_PSPOLL);
1596                 IWL_CMD(CONTROL_RTS);
1597                 IWL_CMD(CONTROL_CTS);
1598                 IWL_CMD(CONTROL_ACK);
1599                 IWL_CMD(CONTROL_CFEND);
1600                 IWL_CMD(CONTROL_CFENDACK);
1601         default:
1602                 return "UNKNOWN";
1603
1604         }
1605 }
1606
1607 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1608 {
1609         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1610         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1611 }
1612
1613 /*
1614  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1615  * iwl_legacy_update_stats function will
1616  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1617  * Use debugFs to display the rx/rx_statistics
1618  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1619  * information will be recorded, but DATA pkt still will be recorded
1620  * for the reason of iwl_led.c need to control the led blinking based on
1621  * number of tx and rx data.
1622  *
1623  */
1624 void
1625 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1626 {
1627         struct traffic_stats    *stats;
1628
1629         if (is_tx)
1630                 stats = &priv->tx_stats;
1631         else
1632                 stats = &priv->rx_stats;
1633
1634         if (ieee80211_is_mgmt(fc)) {
1635                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1636                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1637                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1638                         break;
1639                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1640                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1641                         break;
1642                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1643                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1644                         break;
1645                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1646                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1647                         break;
1648                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1649                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1650                         break;
1651                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1652                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1653                         break;
1654                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1655                         stats->mgmt[MANAGEMENT_BEACON]++;
1656                         break;
1657                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1658                         stats->mgmt[MANAGEMENT_ATIM]++;
1659                         break;
1660                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1661                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1662                         break;
1663                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1664                         stats->mgmt[MANAGEMENT_AUTH]++;
1665                         break;
1666                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1667                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1668                         break;
1669                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1670                         stats->mgmt[MANAGEMENT_ACTION]++;
1671                         break;
1672                 }
1673         } else if (ieee80211_is_ctl(fc)) {
1674                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1675                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1676                         stats->ctrl[CONTROL_BACK_REQ]++;
1677                         break;
1678                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1679                         stats->ctrl[CONTROL_BACK]++;
1680                         break;
1681                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1682                         stats->ctrl[CONTROL_PSPOLL]++;
1683                         break;
1684                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1685                         stats->ctrl[CONTROL_RTS]++;
1686                         break;
1687                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1688                         stats->ctrl[CONTROL_CTS]++;
1689                         break;
1690                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1691                         stats->ctrl[CONTROL_ACK]++;
1692                         break;
1693                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1694                         stats->ctrl[CONTROL_CFEND]++;
1695                         break;
1696                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1697                         stats->ctrl[CONTROL_CFENDACK]++;
1698                         break;
1699                 }
1700         } else {
1701                 /* data */
1702                 stats->data_cnt++;
1703                 stats->data_bytes += len;
1704         }
1705 }
1706 EXPORT_SYMBOL(iwl_legacy_update_stats);
1707 #endif
1708
1709 int iwl_legacy_force_reset(struct iwl_priv *priv, bool external)
1710 {
1711         struct iwl_force_reset *force_reset;
1712
1713         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1714                 return -EINVAL;
1715
1716         force_reset = &priv->force_reset;
1717         force_reset->reset_request_count++;
1718         if (!external) {
1719                 if (force_reset->last_force_reset_jiffies &&
1720                     time_after(force_reset->last_force_reset_jiffies +
1721                     force_reset->reset_duration, jiffies)) {
1722                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1723                         force_reset->reset_reject_count++;
1724                         return -EAGAIN;
1725                 }
1726         }
1727         force_reset->reset_success_count++;
1728         force_reset->last_force_reset_jiffies = jiffies;
1729
1730         /*
1731          * if the request is from external(ex: debugfs),
1732          * then always perform the request in regardless the module
1733          * parameter setting
1734          * if the request is from internal (uCode error or driver
1735          * detect failure), then fw_restart module parameter
1736          * need to be check before performing firmware reload
1737          */
1738
1739         if (!external && !priv->cfg->mod_params->restart_fw) {
1740                 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1741                                "module parameter setting\n");
1742                 return 0;
1743         }
1744
1745         IWL_ERR(priv, "On demand firmware reload\n");
1746
1747         /* Set the FW error flag -- cleared on iwl_down */
1748         set_bit(STATUS_FW_ERROR, &priv->status);
1749         wake_up(&priv->wait_command_queue);
1750         /*
1751          * Keep the restart process from trying to send host
1752          * commands by clearing the INIT status bit
1753          */
1754         clear_bit(STATUS_READY, &priv->status);
1755         queue_work(priv->workqueue, &priv->restart);
1756
1757         return 0;
1758 }
1759
1760 int
1761 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1762                         struct ieee80211_vif *vif,
1763                         enum nl80211_iftype newtype, bool newp2p)
1764 {
1765         struct iwl_priv *priv = hw->priv;
1766         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1767         struct iwl_rxon_context *tmp;
1768         u32 interface_modes;
1769         int err;
1770
1771         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1772
1773         mutex_lock(&priv->mutex);
1774
1775         if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1776                 /*
1777                  * Huh? But wait ... this can maybe happen when
1778                  * we're in the middle of a firmware restart!
1779                  */
1780                 err = -EBUSY;
1781                 goto out;
1782         }
1783
1784         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1785
1786         if (!(interface_modes & BIT(newtype))) {
1787                 err = -EBUSY;
1788                 goto out;
1789         }
1790
1791         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1792                 for_each_context(priv, tmp) {
1793                         if (ctx == tmp)
1794                                 continue;
1795
1796                         if (!tmp->vif)
1797                                 continue;
1798
1799                         /*
1800                          * The current mode switch would be exclusive, but
1801                          * another context is active ... refuse the switch.
1802                          */
1803                         err = -EBUSY;
1804                         goto out;
1805                 }
1806         }
1807
1808         /* success */
1809         iwl_legacy_teardown_interface(priv, vif, true);
1810         vif->type = newtype;
1811         vif->p2p = newp2p;
1812         err = iwl_legacy_setup_interface(priv, ctx);
1813         WARN_ON(err);
1814         /*
1815          * We've switched internally, but submitting to the
1816          * device may have failed for some reason. Mask this
1817          * error, because otherwise mac80211 will not switch
1818          * (and set the interface type back) and we'll be
1819          * out of sync with it.
1820          */
1821         err = 0;
1822
1823  out:
1824         mutex_unlock(&priv->mutex);
1825         return err;
1826 }
1827 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1828
1829 /*
1830  * On every watchdog tick we check (latest) time stamp. If it does not
1831  * change during timeout period and queue is not empty we reset firmware.
1832  */
1833 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1834 {
1835         struct iwl_tx_queue *txq = &priv->txq[cnt];
1836         struct iwl_queue *q = &txq->q;
1837         unsigned long timeout;
1838         int ret;
1839
1840         if (q->read_ptr == q->write_ptr) {
1841                 txq->time_stamp = jiffies;
1842                 return 0;
1843         }
1844
1845         timeout = txq->time_stamp +
1846                   msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1847
1848         if (time_after(jiffies, timeout)) {
1849                 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1850                                 q->id, priv->cfg->base_params->wd_timeout);
1851                 ret = iwl_legacy_force_reset(priv, false);
1852                 return (ret == -EAGAIN) ? 0 : 1;
1853         }
1854
1855         return 0;
1856 }
1857
1858 /*
1859  * Making watchdog tick be a quarter of timeout assure we will
1860  * discover the queue hung between timeout and 1.25*timeout
1861  */
1862 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1863
1864 /*
1865  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1866  * we reset the firmware. If everything is fine just rearm the timer.
1867  */
1868 void iwl_legacy_bg_watchdog(unsigned long data)
1869 {
1870         struct iwl_priv *priv = (struct iwl_priv *)data;
1871         int cnt;
1872         unsigned long timeout;
1873
1874         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1875                 return;
1876
1877         timeout = priv->cfg->base_params->wd_timeout;
1878         if (timeout == 0)
1879                 return;
1880
1881         /* monitor and check for stuck cmd queue */
1882         if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1883                 return;
1884
1885         /* monitor and check for other stuck queues */
1886         if (iwl_legacy_is_any_associated(priv)) {
1887                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1888                         /* skip as we already checked the command queue */
1889                         if (cnt == priv->cmd_queue)
1890                                 continue;
1891                         if (iwl_legacy_check_stuck_queue(priv, cnt))
1892                                 return;
1893                 }
1894         }
1895
1896         mod_timer(&priv->watchdog, jiffies +
1897                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1898 }
1899 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1900
1901 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1902 {
1903         unsigned int timeout = priv->cfg->base_params->wd_timeout;
1904
1905         if (timeout)
1906                 mod_timer(&priv->watchdog,
1907                           jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1908         else
1909                 del_timer(&priv->watchdog);
1910 }
1911 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1912
1913 /*
1914  * extended beacon time format
1915  * time in usec will be changed into a 32-bit value in extended:internal format
1916  * the extended part is the beacon counts
1917  * the internal part is the time in usec within one beacon interval
1918  */
1919 u32
1920 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1921                                         u32 usec, u32 beacon_interval)
1922 {
1923         u32 quot;
1924         u32 rem;
1925         u32 interval = beacon_interval * TIME_UNIT;
1926
1927         if (!interval || !usec)
1928                 return 0;
1929
1930         quot = (usec / interval) &
1931                 (iwl_legacy_beacon_time_mask_high(priv,
1932                 priv->hw_params.beacon_time_tsf_bits) >>
1933                 priv->hw_params.beacon_time_tsf_bits);
1934         rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1935                                    priv->hw_params.beacon_time_tsf_bits);
1936
1937         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1938 }
1939 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1940
1941 /* base is usually what we get from ucode with each received frame,
1942  * the same as HW timer counter counting down
1943  */
1944 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1945                            u32 addon, u32 beacon_interval)
1946 {
1947         u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1948                                         priv->hw_params.beacon_time_tsf_bits);
1949         u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1950                                         priv->hw_params.beacon_time_tsf_bits);
1951         u32 interval = beacon_interval * TIME_UNIT;
1952         u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1953                                 priv->hw_params.beacon_time_tsf_bits)) +
1954                                 (addon & iwl_legacy_beacon_time_mask_high(priv,
1955                                 priv->hw_params.beacon_time_tsf_bits));
1956
1957         if (base_low > addon_low)
1958                 res += base_low - addon_low;
1959         else if (base_low < addon_low) {
1960                 res += interval + base_low - addon_low;
1961                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1962         } else
1963                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1964
1965         return cpu_to_le32(res);
1966 }
1967 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
1968
1969 #ifdef CONFIG_PM
1970
1971 int iwl_legacy_pci_suspend(struct device *device)
1972 {
1973         struct pci_dev *pdev = to_pci_dev(device);
1974         struct iwl_priv *priv = pci_get_drvdata(pdev);
1975
1976         /*
1977          * This function is called when system goes into suspend state
1978          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1979          * first but since iwl_mac_stop() has no knowledge of who the caller is,
1980          * it will not call apm_ops.stop() to stop the DMA operation.
1981          * Calling apm_ops.stop here to make sure we stop the DMA.
1982          */
1983         iwl_legacy_apm_stop(priv);
1984
1985         return 0;
1986 }
1987 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
1988
1989 int iwl_legacy_pci_resume(struct device *device)
1990 {
1991         struct pci_dev *pdev = to_pci_dev(device);
1992         struct iwl_priv *priv = pci_get_drvdata(pdev);
1993         bool hw_rfkill = false;
1994
1995         /*
1996          * We disable the RETRY_TIMEOUT register (0x41) to keep
1997          * PCI Tx retries from interfering with C3 CPU state.
1998          */
1999         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2000
2001         iwl_legacy_enable_interrupts(priv);
2002
2003         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2004                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2005                 hw_rfkill = true;
2006
2007         if (hw_rfkill)
2008                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2009         else
2010                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2011
2012         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2013
2014         return 0;
2015 }
2016 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2017
2018 const struct dev_pm_ops iwl_legacy_pm_ops = {
2019         .suspend = iwl_legacy_pci_suspend,
2020         .resume = iwl_legacy_pci_resume,
2021         .freeze = iwl_legacy_pci_suspend,
2022         .thaw = iwl_legacy_pci_resume,
2023         .poweroff = iwl_legacy_pci_suspend,
2024         .restore = iwl_legacy_pci_resume,
2025 };
2026 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2027
2028 #endif /* CONFIG_PM */
2029
2030 static void
2031 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2032 {
2033         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2034                 return;
2035
2036         if (!ctx->is_active)
2037                 return;
2038
2039         ctx->qos_data.def_qos_parm.qos_flags = 0;
2040
2041         if (ctx->qos_data.qos_active)
2042                 ctx->qos_data.def_qos_parm.qos_flags |=
2043                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2044
2045         if (ctx->ht.enabled)
2046                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2047
2048         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2049                       ctx->qos_data.qos_active,
2050                       ctx->qos_data.def_qos_parm.qos_flags);
2051
2052         iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2053                                sizeof(struct iwl_qosparam_cmd),
2054                                &ctx->qos_data.def_qos_parm, NULL);
2055 }
2056
2057 /**
2058  * iwl_legacy_mac_config - mac80211 config callback
2059  */
2060 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2061 {
2062         struct iwl_priv *priv = hw->priv;
2063         const struct iwl_channel_info *ch_info;
2064         struct ieee80211_conf *conf = &hw->conf;
2065         struct ieee80211_channel *channel = conf->channel;
2066         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2067         struct iwl_rxon_context *ctx;
2068         unsigned long flags = 0;
2069         int ret = 0;
2070         u16 ch;
2071         int scan_active = 0;
2072         bool ht_changed[NUM_IWL_RXON_CTX] = {};
2073
2074         if (WARN_ON(!priv->cfg->ops->legacy))
2075                 return -EOPNOTSUPP;
2076
2077         mutex_lock(&priv->mutex);
2078
2079         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2080                                         channel->hw_value, changed);
2081
2082         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2083                 scan_active = 1;
2084                 IWL_DEBUG_MAC80211(priv, "scan active\n");
2085         }
2086
2087         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2088                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2089                 /* mac80211 uses static for non-HT which is what we want */
2090                 priv->current_ht_config.smps = conf->smps_mode;
2091
2092                 /*
2093                  * Recalculate chain counts.
2094                  *
2095                  * If monitor mode is enabled then mac80211 will
2096                  * set up the SM PS mode to OFF if an HT channel is
2097                  * configured.
2098                  */
2099                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2100                         for_each_context(priv, ctx)
2101                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2102         }
2103
2104         /* during scanning mac80211 will delay channel setting until
2105          * scan finish with changed = 0
2106          */
2107         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2108                 if (scan_active)
2109                         goto set_ch_out;
2110
2111                 ch = channel->hw_value;
2112                 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2113                 if (!iwl_legacy_is_channel_valid(ch_info)) {
2114                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2115                         ret = -EINVAL;
2116                         goto set_ch_out;
2117                 }
2118
2119                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2120                     !iwl_legacy_is_channel_ibss(ch_info)) {
2121                         IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2122                         ret = -EINVAL;
2123                         goto set_ch_out;
2124                 }
2125
2126                 spin_lock_irqsave(&priv->lock, flags);
2127
2128                 for_each_context(priv, ctx) {
2129                         /* Configure HT40 channels */
2130                         if (ctx->ht.enabled != conf_is_ht(conf)) {
2131                                 ctx->ht.enabled = conf_is_ht(conf);
2132                                 ht_changed[ctx->ctxid] = true;
2133                         }
2134                         if (ctx->ht.enabled) {
2135                                 if (conf_is_ht40_minus(conf)) {
2136                                         ctx->ht.extension_chan_offset =
2137                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2138                                         ctx->ht.is_40mhz = true;
2139                                 } else if (conf_is_ht40_plus(conf)) {
2140                                         ctx->ht.extension_chan_offset =
2141                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2142                                         ctx->ht.is_40mhz = true;
2143                                 } else {
2144                                         ctx->ht.extension_chan_offset =
2145                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2146                                         ctx->ht.is_40mhz = false;
2147                                 }
2148                         } else
2149                                 ctx->ht.is_40mhz = false;
2150
2151                         /*
2152                          * Default to no protection. Protection mode will
2153                          * later be set from BSS config in iwl_ht_conf
2154                          */
2155                         ctx->ht.protection =
2156                                         IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2157
2158                         /* if we are switching from ht to 2.4 clear flags
2159                          * from any ht related info since 2.4 does not
2160                          * support ht */
2161                         if ((le16_to_cpu(ctx->staging.channel) != ch))
2162                                 ctx->staging.flags = 0;
2163
2164                         iwl_legacy_set_rxon_channel(priv, channel, ctx);
2165                         iwl_legacy_set_rxon_ht(priv, ht_conf);
2166
2167                         iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2168                                                ctx->vif);
2169                 }
2170
2171                 spin_unlock_irqrestore(&priv->lock, flags);
2172
2173                 if (priv->cfg->ops->legacy->update_bcast_stations)
2174                         ret =
2175                         priv->cfg->ops->legacy->update_bcast_stations(priv);
2176
2177  set_ch_out:
2178                 /* The list of supported rates and rate mask can be different
2179                  * for each band; since the band may have changed, reset
2180                  * the rate mask to what mac80211 lists */
2181                 iwl_legacy_set_rate(priv);
2182         }
2183
2184         if (changed & (IEEE80211_CONF_CHANGE_PS |
2185                         IEEE80211_CONF_CHANGE_IDLE)) {
2186                 ret = iwl_legacy_power_update_mode(priv, false);
2187                 if (ret)
2188                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2189         }
2190
2191         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2192                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2193                         priv->tx_power_user_lmt, conf->power_level);
2194
2195                 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2196         }
2197
2198         if (!iwl_legacy_is_ready(priv)) {
2199                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2200                 goto out;
2201         }
2202
2203         if (scan_active)
2204                 goto out;
2205
2206         for_each_context(priv, ctx) {
2207                 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2208                         iwl_legacy_commit_rxon(priv, ctx);
2209                 else
2210                         IWL_DEBUG_INFO(priv,
2211                                 "Not re-sending same RXON configuration.\n");
2212                 if (ht_changed[ctx->ctxid])
2213                         iwl_legacy_update_qos(priv, ctx);
2214         }
2215
2216 out:
2217         IWL_DEBUG_MAC80211(priv, "leave\n");
2218         mutex_unlock(&priv->mutex);
2219         return ret;
2220 }
2221 EXPORT_SYMBOL(iwl_legacy_mac_config);
2222
2223 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2224 {
2225         struct iwl_priv *priv = hw->priv;
2226         unsigned long flags;
2227         /* IBSS can only be the IWL_RXON_CTX_BSS context */
2228         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2229
2230         if (WARN_ON(!priv->cfg->ops->legacy))
2231                 return;
2232
2233         mutex_lock(&priv->mutex);
2234         IWL_DEBUG_MAC80211(priv, "enter\n");
2235
2236         spin_lock_irqsave(&priv->lock, flags);
2237         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2238         spin_unlock_irqrestore(&priv->lock, flags);
2239
2240         spin_lock_irqsave(&priv->lock, flags);
2241
2242         /* new association get rid of ibss beacon skb */
2243         if (priv->beacon_skb)
2244                 dev_kfree_skb(priv->beacon_skb);
2245
2246         priv->beacon_skb = NULL;
2247
2248         priv->timestamp = 0;
2249
2250         spin_unlock_irqrestore(&priv->lock, flags);
2251
2252         iwl_legacy_scan_cancel_timeout(priv, 100);
2253         if (!iwl_legacy_is_ready_rf(priv)) {
2254                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2255                 mutex_unlock(&priv->mutex);
2256                 return;
2257         }
2258
2259         /* we are restarting association process
2260          * clear RXON_FILTER_ASSOC_MSK bit
2261          */
2262         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2263         iwl_legacy_commit_rxon(priv, ctx);
2264
2265         iwl_legacy_set_rate(priv);
2266
2267         mutex_unlock(&priv->mutex);
2268
2269         IWL_DEBUG_MAC80211(priv, "leave\n");
2270 }
2271 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2272
2273 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2274                         struct ieee80211_vif *vif)
2275 {
2276         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2277         struct ieee80211_sta *sta;
2278         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2279         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2280
2281         IWL_DEBUG_ASSOC(priv, "enter:\n");
2282
2283         if (!ctx->ht.enabled)
2284                 return;
2285
2286         ctx->ht.protection =
2287                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2288         ctx->ht.non_gf_sta_present =
2289                 !!(bss_conf->ht_operation_mode &
2290                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2291
2292         ht_conf->single_chain_sufficient = false;
2293
2294         switch (vif->type) {
2295         case NL80211_IFTYPE_STATION:
2296                 rcu_read_lock();
2297                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2298                 if (sta) {
2299                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2300                         int maxstreams;
2301
2302                         maxstreams = (ht_cap->mcs.tx_params &
2303                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2304                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2305                         maxstreams += 1;
2306
2307                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2308                             (ht_cap->mcs.rx_mask[2] == 0))
2309                                 ht_conf->single_chain_sufficient = true;
2310                         if (maxstreams <= 1)
2311                                 ht_conf->single_chain_sufficient = true;
2312                 } else {
2313                         /*
2314                          * If at all, this can only happen through a race
2315                          * when the AP disconnects us while we're still
2316                          * setting up the connection, in that case mac80211
2317                          * will soon tell us about that.
2318                          */
2319                         ht_conf->single_chain_sufficient = true;
2320                 }
2321                 rcu_read_unlock();
2322                 break;
2323         case NL80211_IFTYPE_ADHOC:
2324                 ht_conf->single_chain_sufficient = true;
2325                 break;
2326         default:
2327                 break;
2328         }
2329
2330         IWL_DEBUG_ASSOC(priv, "leave\n");
2331 }
2332
2333 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2334                                     struct ieee80211_vif *vif)
2335 {
2336         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2337
2338         /*
2339          * inform the ucode that there is no longer an
2340          * association and that no more packets should be
2341          * sent
2342          */
2343         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2344         ctx->staging.assoc_id = 0;
2345         iwl_legacy_commit_rxon(priv, ctx);
2346 }
2347
2348 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2349                                   struct ieee80211_vif *vif)
2350 {
2351         struct iwl_priv *priv = hw->priv;
2352         unsigned long flags;
2353         __le64 timestamp;
2354         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2355
2356         if (!skb)
2357                 return;
2358
2359         IWL_DEBUG_MAC80211(priv, "enter\n");
2360
2361         lockdep_assert_held(&priv->mutex);
2362
2363         if (!priv->beacon_ctx) {
2364                 IWL_ERR(priv, "update beacon but no beacon context!\n");
2365                 dev_kfree_skb(skb);
2366                 return;
2367         }
2368
2369         spin_lock_irqsave(&priv->lock, flags);
2370
2371         if (priv->beacon_skb)
2372                 dev_kfree_skb(priv->beacon_skb);
2373
2374         priv->beacon_skb = skb;
2375
2376         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2377         priv->timestamp = le64_to_cpu(timestamp);
2378
2379         IWL_DEBUG_MAC80211(priv, "leave\n");
2380         spin_unlock_irqrestore(&priv->lock, flags);
2381
2382         if (!iwl_legacy_is_ready_rf(priv)) {
2383                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2384                 return;
2385         }
2386
2387         priv->cfg->ops->legacy->post_associate(priv);
2388 }
2389
2390 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2391                                      struct ieee80211_vif *vif,
2392                                      struct ieee80211_bss_conf *bss_conf,
2393                                      u32 changes)
2394 {
2395         struct iwl_priv *priv = hw->priv;
2396         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2397         int ret;
2398
2399         if (WARN_ON(!priv->cfg->ops->legacy))
2400                 return;
2401
2402         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2403
2404         mutex_lock(&priv->mutex);
2405
2406         if (!iwl_legacy_is_alive(priv)) {
2407                 mutex_unlock(&priv->mutex);
2408                 return;
2409         }
2410
2411         if (changes & BSS_CHANGED_QOS) {
2412                 unsigned long flags;
2413
2414                 spin_lock_irqsave(&priv->lock, flags);
2415                 ctx->qos_data.qos_active = bss_conf->qos;
2416                 iwl_legacy_update_qos(priv, ctx);
2417                 spin_unlock_irqrestore(&priv->lock, flags);
2418         }
2419
2420         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2421                 /*
2422                  * the add_interface code must make sure we only ever
2423                  * have a single interface that could be beaconing at
2424                  * any time.
2425                  */
2426                 if (vif->bss_conf.enable_beacon)
2427                         priv->beacon_ctx = ctx;
2428                 else
2429                         priv->beacon_ctx = NULL;
2430         }
2431
2432         if (changes & BSS_CHANGED_BSSID) {
2433                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2434
2435                 /*
2436                  * If there is currently a HW scan going on in the
2437                  * background then we need to cancel it else the RXON
2438                  * below/in post_associate will fail.
2439                  */
2440                 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2441                         IWL_WARN(priv,
2442                                 "Aborted scan still in progress after 100ms\n");
2443                         IWL_DEBUG_MAC80211(priv,
2444                                 "leaving - scan abort failed.\n");
2445                         mutex_unlock(&priv->mutex);
2446                         return;
2447                 }
2448
2449                 /* mac80211 only sets assoc when in STATION mode */
2450                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2451                         memcpy(ctx->staging.bssid_addr,
2452                                bss_conf->bssid, ETH_ALEN);
2453
2454                         /* currently needed in a few places */
2455                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2456                 } else {
2457                         ctx->staging.filter_flags &=
2458                                 ~RXON_FILTER_ASSOC_MSK;
2459                 }
2460
2461         }
2462
2463         /*
2464          * This needs to be after setting the BSSID in case
2465          * mac80211 decides to do both changes at once because
2466          * it will invoke post_associate.
2467          */
2468         if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2469                 iwl_legacy_beacon_update(hw, vif);
2470
2471         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2472                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2473                                    bss_conf->use_short_preamble);
2474                 if (bss_conf->use_short_preamble)
2475                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2476                 else
2477                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2478         }
2479
2480         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2481                 IWL_DEBUG_MAC80211(priv,
2482                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
2483                 if (bss_conf->use_cts_prot &&
2484                         (priv->band != IEEE80211_BAND_5GHZ))
2485                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2486                 else
2487                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2488                 if (bss_conf->use_cts_prot)
2489                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2490                 else
2491                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2492         }
2493
2494         if (changes & BSS_CHANGED_BASIC_RATES) {
2495                 /* XXX use this information
2496                  *
2497                  * To do that, remove code from iwl_legacy_set_rate() and put something
2498                  * like this here:
2499                  *
2500                 if (A-band)
2501                         ctx->staging.ofdm_basic_rates =
2502                                 bss_conf->basic_rates;
2503                 else
2504                         ctx->staging.ofdm_basic_rates =
2505                                 bss_conf->basic_rates >> 4;
2506                         ctx->staging.cck_basic_rates =
2507                                 bss_conf->basic_rates & 0xF;
2508                  */
2509         }
2510
2511         if (changes & BSS_CHANGED_HT) {
2512                 iwl_legacy_ht_conf(priv, vif);
2513
2514                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2515                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2516         }
2517
2518         if (changes & BSS_CHANGED_ASSOC) {
2519                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2520                 if (bss_conf->assoc) {
2521                         priv->timestamp = bss_conf->timestamp;
2522
2523                         if (!iwl_legacy_is_rfkill(priv))
2524                                 priv->cfg->ops->legacy->post_associate(priv);
2525                 } else
2526                         iwl_legacy_set_no_assoc(priv, vif);
2527         }
2528
2529         if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2530                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2531                                    changes);
2532                 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2533                 if (!ret) {
2534                         /* Sync active_rxon with latest change. */
2535                         memcpy((void *)&ctx->active,
2536                                 &ctx->staging,
2537                                 sizeof(struct iwl_legacy_rxon_cmd));
2538                 }
2539         }
2540
2541         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2542                 if (vif->bss_conf.enable_beacon) {
2543                         memcpy(ctx->staging.bssid_addr,
2544                                bss_conf->bssid, ETH_ALEN);
2545                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2546                         priv->cfg->ops->legacy->config_ap(priv);
2547                 } else
2548                         iwl_legacy_set_no_assoc(priv, vif);
2549         }
2550
2551         if (changes & BSS_CHANGED_IBSS) {
2552                 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2553                                                         bss_conf->ibss_joined);
2554                 if (ret)
2555                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2556                                 bss_conf->ibss_joined ? "add" : "remove",
2557                                 bss_conf->bssid);
2558         }
2559
2560         mutex_unlock(&priv->mutex);
2561
2562         IWL_DEBUG_MAC80211(priv, "leave\n");
2563 }
2564 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2565
2566 irqreturn_t iwl_legacy_isr(int irq, void *data)
2567 {
2568         struct iwl_priv *priv = data;
2569         u32 inta, inta_mask;
2570         u32 inta_fh;
2571         unsigned long flags;
2572         if (!priv)
2573                 return IRQ_NONE;
2574
2575         spin_lock_irqsave(&priv->lock, flags);
2576
2577         /* Disable (but don't clear!) interrupts here to avoid
2578          *    back-to-back ISRs and sporadic interrupts from our NIC.
2579          * If we have something to service, the tasklet will re-enable ints.
2580          * If we *don't* have something, we'll re-enable before leaving here. */
2581         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2582         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2583
2584         /* Discover which interrupts are active/pending */
2585         inta = iwl_read32(priv, CSR_INT);
2586         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2587
2588         /* Ignore interrupt if there's nothing in NIC to service.
2589          * This may be due to IRQ shared with another device,
2590          * or due to sporadic interrupts thrown from our NIC. */
2591         if (!inta && !inta_fh) {
2592                 IWL_DEBUG_ISR(priv,
2593                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
2594                 goto none;
2595         }
2596
2597         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2598                 /* Hardware disappeared. It might have already raised
2599                  * an interrupt */
2600                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2601                 goto unplugged;
2602         }
2603
2604         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2605                       inta, inta_mask, inta_fh);
2606
2607         inta &= ~CSR_INT_BIT_SCD;
2608
2609         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2610         if (likely(inta || inta_fh))
2611                 tasklet_schedule(&priv->irq_tasklet);
2612
2613 unplugged:
2614         spin_unlock_irqrestore(&priv->lock, flags);
2615         return IRQ_HANDLED;
2616
2617 none:
2618         /* re-enable interrupts here since we don't have anything to service. */
2619         /* only Re-enable if disabled by irq */
2620         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2621                 iwl_legacy_enable_interrupts(priv);
2622         spin_unlock_irqrestore(&priv->lock, flags);
2623         return IRQ_NONE;
2624 }
2625 EXPORT_SYMBOL(iwl_legacy_isr);
2626
2627 /*
2628  *  iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2629  *  function.
2630  */
2631 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2632                                struct ieee80211_tx_info *info,
2633                                __le16 fc, __le32 *tx_flags)
2634 {
2635         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2636                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2637                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2638                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2639
2640                 if (!ieee80211_is_mgmt(fc))
2641                         return;
2642
2643                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2644                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2645                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2646                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2647                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2648                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2649                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
2650                         break;
2651                 }
2652         } else if (info->control.rates[0].flags &
2653                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
2654                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2655                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2656                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2657         }
2658 }
2659 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);