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[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2  *
3  * GPL LICENSE SUMMARY
4  *
5  * Copyright(c) 2008 - 2009 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 <net/mac80211.h>
33
34 #include "iwl-eeprom.h"
35 #include "iwl-dev.h" /* FIXME: remove */
36 #include "iwl-debug.h"
37 #include "iwl-core.h"
38 #include "iwl-io.h"
39 #include "iwl-power.h"
40 #include "iwl-sta.h"
41 #include "iwl-helpers.h"
42
43
44 MODULE_DESCRIPTION("iwl core");
45 MODULE_VERSION(IWLWIFI_VERSION);
46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
47 MODULE_LICENSE("GPL");
48
49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
51                                     IWL_RATE_SISO_##s##M_PLCP, \
52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
54                                     IWL_RATE_##r##M_IEEE,      \
55                                     IWL_RATE_##ip##M_INDEX,    \
56                                     IWL_RATE_##in##M_INDEX,    \
57                                     IWL_RATE_##rp##M_INDEX,    \
58                                     IWL_RATE_##rn##M_INDEX,    \
59                                     IWL_RATE_##pp##M_INDEX,    \
60                                     IWL_RATE_##np##M_INDEX }
61
62 u32 iwl_debug_level;
63 EXPORT_SYMBOL(iwl_debug_level);
64
65 static irqreturn_t iwl_isr(int irq, void *data);
66
67 /*
68  * Parameter order:
69  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
70  *
71  * If there isn't a valid next or previous rate then INV is used which
72  * maps to IWL_RATE_INVALID
73  *
74  */
75 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
76         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
77         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
78         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
79         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
80         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
81         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
82         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
83         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
84         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
85         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
86         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
87         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
88         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
89         /* FIXME:RS:          ^^    should be INV (legacy) */
90 };
91 EXPORT_SYMBOL(iwl_rates);
92
93 /**
94  * translate ucode response to mac80211 tx status control values
95  */
96 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
97                                   struct ieee80211_tx_info *info)
98 {
99         struct ieee80211_tx_rate *r = &info->control.rates[0];
100
101         info->antenna_sel_tx =
102                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
103         if (rate_n_flags & RATE_MCS_HT_MSK)
104                 r->flags |= IEEE80211_TX_RC_MCS;
105         if (rate_n_flags & RATE_MCS_GF_MSK)
106                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
107         if (rate_n_flags & RATE_MCS_HT40_MSK)
108                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
109         if (rate_n_flags & RATE_MCS_DUP_MSK)
110                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
111         if (rate_n_flags & RATE_MCS_SGI_MSK)
112                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
113         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
114 }
115 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
116
117 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
118 {
119         int idx = 0;
120
121         /* HT rate format */
122         if (rate_n_flags & RATE_MCS_HT_MSK) {
123                 idx = (rate_n_flags & 0xff);
124
125                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
126                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
127                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
128                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
129
130                 idx += IWL_FIRST_OFDM_RATE;
131                 /* skip 9M not supported in ht*/
132                 if (idx >= IWL_RATE_9M_INDEX)
133                         idx += 1;
134                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
135                         return idx;
136
137         /* legacy rate format, search for match in table */
138         } else {
139                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
140                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
141                                 return idx;
142         }
143
144         return -1;
145 }
146 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
147
148 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
149 {
150         int idx = 0;
151         int band_offset = 0;
152
153         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
154         if (rate_n_flags & RATE_MCS_HT_MSK) {
155                 idx = (rate_n_flags & 0xff);
156                 return idx;
157         /* Legacy rate format, search for match in table */
158         } else {
159                 if (band == IEEE80211_BAND_5GHZ)
160                         band_offset = IWL_FIRST_OFDM_RATE;
161                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
162                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
163                                 return idx - band_offset;
164         }
165
166         return -1;
167 }
168
169 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
170 {
171         int i;
172         u8 ind = ant;
173         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
174                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
175                 if (priv->hw_params.valid_tx_ant & BIT(ind))
176                         return ind;
177         }
178         return ant;
179 }
180
181 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
182 EXPORT_SYMBOL(iwl_bcast_addr);
183
184
185 /* This function both allocates and initializes hw and priv. */
186 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
187                 struct ieee80211_ops *hw_ops)
188 {
189         struct iwl_priv *priv;
190
191         /* mac80211 allocates memory for this device instance, including
192          *   space for this driver's private structure */
193         struct ieee80211_hw *hw =
194                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
195         if (hw == NULL) {
196                 printk(KERN_ERR "%s: Can not allocate network device\n",
197                        cfg->name);
198                 goto out;
199         }
200
201         priv = hw->priv;
202         priv->hw = hw;
203
204 out:
205         return hw;
206 }
207 EXPORT_SYMBOL(iwl_alloc_all);
208
209 void iwl_hw_detect(struct iwl_priv *priv)
210 {
211         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
212         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
213         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
214 }
215 EXPORT_SYMBOL(iwl_hw_detect);
216
217 int iwl_hw_nic_init(struct iwl_priv *priv)
218 {
219         unsigned long flags;
220         struct iwl_rx_queue *rxq = &priv->rxq;
221         int ret;
222
223         /* nic_init */
224         spin_lock_irqsave(&priv->lock, flags);
225         priv->cfg->ops->lib->apm_ops.init(priv);
226         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
227         spin_unlock_irqrestore(&priv->lock, flags);
228
229         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
230
231         priv->cfg->ops->lib->apm_ops.config(priv);
232
233         /* Allocate the RX queue, or reset if it is already allocated */
234         if (!rxq->bd) {
235                 ret = iwl_rx_queue_alloc(priv);
236                 if (ret) {
237                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
238                         return -ENOMEM;
239                 }
240         } else
241                 iwl_rx_queue_reset(priv, rxq);
242
243         iwl_rx_replenish(priv);
244
245         iwl_rx_init(priv, rxq);
246
247         spin_lock_irqsave(&priv->lock, flags);
248
249         rxq->need_update = 1;
250         iwl_rx_queue_update_write_ptr(priv, rxq);
251
252         spin_unlock_irqrestore(&priv->lock, flags);
253
254         /* Allocate and init all Tx and Command queues */
255         ret = iwl_txq_ctx_reset(priv);
256         if (ret)
257                 return ret;
258
259         set_bit(STATUS_INIT, &priv->status);
260
261         return 0;
262 }
263 EXPORT_SYMBOL(iwl_hw_nic_init);
264
265 /*
266  * QoS  support
267 */
268 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
269 {
270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
271                 return;
272
273         priv->qos_data.def_qos_parm.qos_flags = 0;
274
275         if (priv->qos_data.qos_cap.q_AP.queue_request &&
276             !priv->qos_data.qos_cap.q_AP.txop_request)
277                 priv->qos_data.def_qos_parm.qos_flags |=
278                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
279         if (priv->qos_data.qos_active)
280                 priv->qos_data.def_qos_parm.qos_flags |=
281                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
282
283         if (priv->current_ht_config.is_ht)
284                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
285
286         if (force || iwl_is_associated(priv)) {
287                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
288                                 priv->qos_data.qos_active,
289                                 priv->qos_data.def_qos_parm.qos_flags);
290
291                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
292                                        sizeof(struct iwl_qosparam_cmd),
293                                        &priv->qos_data.def_qos_parm, NULL);
294         }
295 }
296 EXPORT_SYMBOL(iwl_activate_qos);
297
298 /*
299  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
300  *                                              (802.11b)      (802.11a/g)
301  * AC_BK      15            1023        7           0               0
302  * AC_BE      15            1023        3           0               0
303  * AC_VI       7              15        2          6.016ms       3.008ms
304  * AC_VO       3               7        2          3.264ms       1.504ms
305  */
306 void iwl_reset_qos(struct iwl_priv *priv)
307 {
308         u16 cw_min = 15;
309         u16 cw_max = 1023;
310         u8 aifs = 2;
311         bool is_legacy = false;
312         unsigned long flags;
313         int i;
314
315         spin_lock_irqsave(&priv->lock, flags);
316         /* QoS always active in AP and ADHOC mode
317          * In STA mode wait for association
318          */
319         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
320             priv->iw_mode == NL80211_IFTYPE_AP)
321                 priv->qos_data.qos_active = 1;
322         else
323                 priv->qos_data.qos_active = 0;
324
325         /* check for legacy mode */
326         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
327             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
328             (priv->iw_mode == NL80211_IFTYPE_STATION &&
329             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
330                 cw_min = 31;
331                 is_legacy = 1;
332         }
333
334         if (priv->qos_data.qos_active)
335                 aifs = 3;
336
337         /* AC_BE */
338         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
339         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
340         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
341         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
342         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
343
344         if (priv->qos_data.qos_active) {
345                 /* AC_BK */
346                 i = 1;
347                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
348                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
349                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
350                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
351                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
352
353                 /* AC_VI */
354                 i = 2;
355                 priv->qos_data.def_qos_parm.ac[i].cw_min =
356                         cpu_to_le16((cw_min + 1) / 2 - 1);
357                 priv->qos_data.def_qos_parm.ac[i].cw_max =
358                         cpu_to_le16(cw_min);
359                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
360                 if (is_legacy)
361                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
362                                 cpu_to_le16(6016);
363                 else
364                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
365                                 cpu_to_le16(3008);
366                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
367
368                 /* AC_VO */
369                 i = 3;
370                 priv->qos_data.def_qos_parm.ac[i].cw_min =
371                         cpu_to_le16((cw_min + 1) / 4 - 1);
372                 priv->qos_data.def_qos_parm.ac[i].cw_max =
373                         cpu_to_le16((cw_min + 1) / 2 - 1);
374                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
375                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
376                 if (is_legacy)
377                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
378                                 cpu_to_le16(3264);
379                 else
380                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
381                                 cpu_to_le16(1504);
382         } else {
383                 for (i = 1; i < 4; i++) {
384                         priv->qos_data.def_qos_parm.ac[i].cw_min =
385                                 cpu_to_le16(cw_min);
386                         priv->qos_data.def_qos_parm.ac[i].cw_max =
387                                 cpu_to_le16(cw_max);
388                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
389                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
390                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
391                 }
392         }
393         IWL_DEBUG_QOS(priv, "set QoS to default \n");
394
395         spin_unlock_irqrestore(&priv->lock, flags);
396 }
397 EXPORT_SYMBOL(iwl_reset_qos);
398
399 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
400 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
401 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
402                               struct ieee80211_sta_ht_cap *ht_info,
403                               enum ieee80211_band band)
404 {
405         u16 max_bit_rate = 0;
406         u8 rx_chains_num = priv->hw_params.rx_chains_num;
407         u8 tx_chains_num = priv->hw_params.tx_chains_num;
408
409         ht_info->cap = 0;
410         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
411
412         ht_info->ht_supported = true;
413
414         if (priv->cfg->ht_greenfield_support)
415                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
416         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
417         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
418                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
419
420         max_bit_rate = MAX_BIT_RATE_20_MHZ;
421         if (priv->hw_params.ht40_channel & BIT(band)) {
422                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
423                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
424                 ht_info->mcs.rx_mask[4] = 0x01;
425                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
426         }
427
428         if (priv->cfg->mod_params->amsdu_size_8K)
429                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
430
431         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
432         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
433
434         ht_info->mcs.rx_mask[0] = 0xFF;
435         if (rx_chains_num >= 2)
436                 ht_info->mcs.rx_mask[1] = 0xFF;
437         if (rx_chains_num >= 3)
438                 ht_info->mcs.rx_mask[2] = 0xFF;
439
440         /* Highest supported Rx data rate */
441         max_bit_rate *= rx_chains_num;
442         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
443         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
444
445         /* Tx MCS capabilities */
446         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
447         if (tx_chains_num != rx_chains_num) {
448                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
449                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
450                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
451         }
452 }
453
454 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
455                               struct ieee80211_rate *rates)
456 {
457         int i;
458
459         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
460                 rates[i].bitrate = iwl_rates[i].ieee * 5;
461                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
462                 rates[i].hw_value_short = i;
463                 rates[i].flags = 0;
464                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
465                         /*
466                          * If CCK != 1M then set short preamble rate flag.
467                          */
468                         rates[i].flags |=
469                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
470                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
471                 }
472         }
473 }
474
475
476 /**
477  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
478  */
479 int iwlcore_init_geos(struct iwl_priv *priv)
480 {
481         struct iwl_channel_info *ch;
482         struct ieee80211_supported_band *sband;
483         struct ieee80211_channel *channels;
484         struct ieee80211_channel *geo_ch;
485         struct ieee80211_rate *rates;
486         int i = 0;
487
488         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
489             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
490                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
491                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
492                 return 0;
493         }
494
495         channels = kzalloc(sizeof(struct ieee80211_channel) *
496                            priv->channel_count, GFP_KERNEL);
497         if (!channels)
498                 return -ENOMEM;
499
500         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
501                         GFP_KERNEL);
502         if (!rates) {
503                 kfree(channels);
504                 return -ENOMEM;
505         }
506
507         /* 5.2GHz channels start after the 2.4GHz channels */
508         sband = &priv->bands[IEEE80211_BAND_5GHZ];
509         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
510         /* just OFDM */
511         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
512         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
513
514         if (priv->cfg->sku & IWL_SKU_N)
515                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
516                                          IEEE80211_BAND_5GHZ);
517
518         sband = &priv->bands[IEEE80211_BAND_2GHZ];
519         sband->channels = channels;
520         /* OFDM & CCK */
521         sband->bitrates = rates;
522         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
523
524         if (priv->cfg->sku & IWL_SKU_N)
525                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
526                                          IEEE80211_BAND_2GHZ);
527
528         priv->ieee_channels = channels;
529         priv->ieee_rates = rates;
530
531         for (i = 0;  i < priv->channel_count; i++) {
532                 ch = &priv->channel_info[i];
533
534                 /* FIXME: might be removed if scan is OK */
535                 if (!is_channel_valid(ch))
536                         continue;
537
538                 if (is_channel_a_band(ch))
539                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
540                 else
541                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
542
543                 geo_ch = &sband->channels[sband->n_channels++];
544
545                 geo_ch->center_freq =
546                                 ieee80211_channel_to_frequency(ch->channel);
547                 geo_ch->max_power = ch->max_power_avg;
548                 geo_ch->max_antenna_gain = 0xff;
549                 geo_ch->hw_value = ch->channel;
550
551                 if (is_channel_valid(ch)) {
552                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
553                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
554
555                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
556                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
557
558                         if (ch->flags & EEPROM_CHANNEL_RADAR)
559                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
560
561                         geo_ch->flags |= ch->ht40_extension_channel;
562
563                         if (ch->max_power_avg > priv->tx_power_device_lmt)
564                                 priv->tx_power_device_lmt = ch->max_power_avg;
565                 } else {
566                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
567                 }
568
569                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
570                                 ch->channel, geo_ch->center_freq,
571                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
572                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
573                                 "restricted" : "valid",
574                                  geo_ch->flags);
575         }
576
577         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
578              priv->cfg->sku & IWL_SKU_A) {
579                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
580                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
581                            priv->pci_dev->device,
582                            priv->pci_dev->subsystem_device);
583                 priv->cfg->sku &= ~IWL_SKU_A;
584         }
585
586         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
587                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
588                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
589
590         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
591
592         return 0;
593 }
594 EXPORT_SYMBOL(iwlcore_init_geos);
595
596 /*
597  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
598  */
599 void iwlcore_free_geos(struct iwl_priv *priv)
600 {
601         kfree(priv->ieee_channels);
602         kfree(priv->ieee_rates);
603         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
604 }
605 EXPORT_SYMBOL(iwlcore_free_geos);
606
607 static bool is_single_rx_stream(struct iwl_priv *priv)
608 {
609         return !priv->current_ht_config.is_ht ||
610                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
611                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
612 }
613
614 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
615                                    enum ieee80211_band band,
616                                    u16 channel, u8 extension_chan_offset)
617 {
618         const struct iwl_channel_info *ch_info;
619
620         ch_info = iwl_get_channel_info(priv, band, channel);
621         if (!is_channel_valid(ch_info))
622                 return 0;
623
624         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
625                 return !(ch_info->ht40_extension_channel &
626                                         IEEE80211_CHAN_NO_HT40PLUS);
627         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
628                 return !(ch_info->ht40_extension_channel &
629                                         IEEE80211_CHAN_NO_HT40MINUS);
630
631         return 0;
632 }
633
634 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
635                          struct ieee80211_sta_ht_cap *sta_ht_inf)
636 {
637         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
638
639         if ((!iwl_ht_conf->is_ht) ||
640             (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
641                 return 0;
642
643         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
644          * the bit will not set if it is pure 40MHz case
645          */
646         if (sta_ht_inf) {
647                 if (!sta_ht_inf->ht_supported)
648                         return 0;
649         }
650 #ifdef CONFIG_IWLWIFI_DEBUG
651         if (priv->disable_ht40)
652                 return 0;
653 #endif
654         return iwl_is_channel_extension(priv, priv->band,
655                         le16_to_cpu(priv->staging_rxon.channel),
656                         iwl_ht_conf->extension_chan_offset);
657 }
658 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
659
660 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
661 {
662         u16 new_val = 0;
663         u16 beacon_factor = 0;
664
665         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
666         new_val = beacon_val / beacon_factor;
667
668         if (!new_val)
669                 new_val = max_beacon_val;
670
671         return new_val;
672 }
673
674 void iwl_setup_rxon_timing(struct iwl_priv *priv)
675 {
676         u64 tsf;
677         s32 interval_tm, rem;
678         unsigned long flags;
679         struct ieee80211_conf *conf = NULL;
680         u16 beacon_int;
681
682         conf = ieee80211_get_hw_conf(priv->hw);
683
684         spin_lock_irqsave(&priv->lock, flags);
685         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
686         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
687
688         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
689                 beacon_int = priv->beacon_int;
690                 priv->rxon_timing.atim_window = 0;
691         } else {
692                 beacon_int = priv->vif->bss_conf.beacon_int;
693
694                 /* TODO: we need to get atim_window from upper stack
695                  * for now we set to 0 */
696                 priv->rxon_timing.atim_window = 0;
697         }
698
699         beacon_int = iwl_adjust_beacon_interval(beacon_int,
700                                 priv->hw_params.max_beacon_itrvl * 1024);
701         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
702
703         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
704         interval_tm = beacon_int * 1024;
705         rem = do_div(tsf, interval_tm);
706         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
707
708         spin_unlock_irqrestore(&priv->lock, flags);
709         IWL_DEBUG_ASSOC(priv,
710                         "beacon interval %d beacon timer %d beacon tim %d\n",
711                         le16_to_cpu(priv->rxon_timing.beacon_interval),
712                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
713                         le16_to_cpu(priv->rxon_timing.atim_window));
714 }
715 EXPORT_SYMBOL(iwl_setup_rxon_timing);
716
717 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
718 {
719         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
720
721         if (hw_decrypt)
722                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
723         else
724                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
725
726 }
727 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
728
729 /**
730  * iwl_check_rxon_cmd - validate RXON structure is valid
731  *
732  * NOTE:  This is really only useful during development and can eventually
733  * be #ifdef'd out once the driver is stable and folks aren't actively
734  * making changes
735  */
736 int iwl_check_rxon_cmd(struct iwl_priv *priv)
737 {
738         int error = 0;
739         int counter = 1;
740         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
741
742         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
743                 error |= le32_to_cpu(rxon->flags &
744                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
745                                  RXON_FLG_RADAR_DETECT_MSK));
746                 if (error)
747                         IWL_WARN(priv, "check 24G fields %d | %d\n",
748                                     counter++, error);
749         } else {
750                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
751                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
752                 if (error)
753                         IWL_WARN(priv, "check 52 fields %d | %d\n",
754                                     counter++, error);
755                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
756                 if (error)
757                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
758                                     counter++, error);
759         }
760         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
761         if (error)
762                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
763
764         /* make sure basic rates 6Mbps and 1Mbps are supported */
765         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
766                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
767         if (error)
768                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
769
770         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
771         if (error)
772                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
773
774         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
775                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
776         if (error)
777                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
778                             counter++, error);
779
780         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
781                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
782         if (error)
783                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
784                             counter++, error);
785
786         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
787                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
788         if (error)
789                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
790                             counter++, error);
791
792         if (error)
793                 IWL_WARN(priv, "Tuning to channel %d\n",
794                             le16_to_cpu(rxon->channel));
795
796         if (error) {
797                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
798                 return -1;
799         }
800         return 0;
801 }
802 EXPORT_SYMBOL(iwl_check_rxon_cmd);
803
804 /**
805  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
806  * @priv: staging_rxon is compared to active_rxon
807  *
808  * If the RXON structure is changing enough to require a new tune,
809  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
810  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
811  */
812 int iwl_full_rxon_required(struct iwl_priv *priv)
813 {
814
815         /* These items are only settable from the full RXON command */
816         if (!(iwl_is_associated(priv)) ||
817             compare_ether_addr(priv->staging_rxon.bssid_addr,
818                                priv->active_rxon.bssid_addr) ||
819             compare_ether_addr(priv->staging_rxon.node_addr,
820                                priv->active_rxon.node_addr) ||
821             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
822                                priv->active_rxon.wlap_bssid_addr) ||
823             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
824             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
825             (priv->staging_rxon.air_propagation !=
826              priv->active_rxon.air_propagation) ||
827             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
828              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
829             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
830              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
831             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
832              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
833             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
834                 return 1;
835
836         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
837          * be updated with the RXON_ASSOC command -- however only some
838          * flag transitions are allowed using RXON_ASSOC */
839
840         /* Check if we are not switching bands */
841         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
842             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
843                 return 1;
844
845         /* Check if we are switching association toggle */
846         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
847                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
848                 return 1;
849
850         return 0;
851 }
852 EXPORT_SYMBOL(iwl_full_rxon_required);
853
854 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
855 {
856         int i;
857         int rate_mask;
858
859         /* Set rate mask*/
860         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
861                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
862         else
863                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
864
865         /* Find lowest valid rate */
866         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
867                                         i = iwl_rates[i].next_ieee) {
868                 if (rate_mask & (1 << i))
869                         return iwl_rates[i].plcp;
870         }
871
872         /* No valid rate was found. Assign the lowest one */
873         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
874                 return IWL_RATE_1M_PLCP;
875         else
876                 return IWL_RATE_6M_PLCP;
877 }
878 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
879
880 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
881 {
882         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
883
884         if (!ht_info->is_ht) {
885                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
886                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
887                         RXON_FLG_HT40_PROT_MSK |
888                         RXON_FLG_HT_PROT_MSK);
889                 return;
890         }
891
892         /* FIXME: if the definition of ht_protection changed, the "translation"
893          * will be needed for rxon->flags
894          */
895         rxon->flags |= cpu_to_le32(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
896
897         /* Set up channel bandwidth:
898          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
899         /* clear the HT channel mode before set the mode */
900         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
901                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
902         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
903                 /* pure ht40 */
904                 if (ht_info->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
905                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
906                         /* Note: control channel is opposite of extension channel */
907                         switch (ht_info->extension_chan_offset) {
908                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
909                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
910                                 break;
911                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
912                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
913                                 break;
914                         }
915                 } else {
916                         /* Note: control channel is opposite of extension channel */
917                         switch (ht_info->extension_chan_offset) {
918                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
919                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
920                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
921                                 break;
922                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
923                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
924                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
925                                 break;
926                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
927                         default:
928                                 /* channel location only valid if in Mixed mode */
929                                 IWL_ERR(priv, "invalid extension channel offset\n");
930                                 break;
931                         }
932                 }
933         } else {
934                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
935         }
936
937         if (priv->cfg->ops->hcmd->set_rxon_chain)
938                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
939
940         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
941                         "rxon flags 0x%X operation mode :0x%X "
942                         "extension channel offset 0x%x\n",
943                         ht_info->mcs.rx_mask[0],
944                         ht_info->mcs.rx_mask[1],
945                         ht_info->mcs.rx_mask[2],
946                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
947                         ht_info->extension_chan_offset);
948         return;
949 }
950 EXPORT_SYMBOL(iwl_set_rxon_ht);
951
952 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
953 #define IWL_NUM_RX_CHAINS_SINGLE        2
954 #define IWL_NUM_IDLE_CHAINS_DUAL        2
955 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
956
957 /* Determine how many receiver/antenna chains to use.
958  * More provides better reception via diversity.  Fewer saves power.
959  * MIMO (dual stream) requires at least 2, but works better with 3.
960  * This does not determine *which* chains to use, just how many.
961  */
962 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
963 {
964         bool is_single = is_single_rx_stream(priv);
965         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
966
967         /* # of Rx chains to use when expecting MIMO. */
968         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
969                                                  WLAN_HT_CAP_SM_PS_STATIC)))
970                 return IWL_NUM_RX_CHAINS_SINGLE;
971         else
972                 return IWL_NUM_RX_CHAINS_MULTIPLE;
973 }
974
975 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
976 {
977         int idle_cnt;
978         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
979         /* # Rx chains when idling and maybe trying to save power */
980         switch (priv->current_ht_config.sm_ps) {
981         case WLAN_HT_CAP_SM_PS_STATIC:
982         case WLAN_HT_CAP_SM_PS_DYNAMIC:
983                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
984                                         IWL_NUM_IDLE_CHAINS_SINGLE;
985                 break;
986         case WLAN_HT_CAP_SM_PS_DISABLED:
987                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
988                 break;
989         case WLAN_HT_CAP_SM_PS_INVALID:
990         default:
991                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
992                            priv->current_ht_config.sm_ps);
993                 WARN_ON(1);
994                 idle_cnt = -1;
995                 break;
996         }
997         return idle_cnt;
998 }
999
1000 /* up to 4 chains */
1001 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1002 {
1003         u8 res;
1004         res = (chain_bitmap & BIT(0)) >> 0;
1005         res += (chain_bitmap & BIT(1)) >> 1;
1006         res += (chain_bitmap & BIT(2)) >> 2;
1007         res += (chain_bitmap & BIT(4)) >> 4;
1008         return res;
1009 }
1010
1011 /**
1012  * iwl_is_monitor_mode - Determine if interface in monitor mode
1013  *
1014  * priv->iw_mode is set in add_interface, but add_interface is
1015  * never called for monitor mode. The only way mac80211 informs us about
1016  * monitor mode is through configuring filters (call to configure_filter).
1017  */
1018 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1019 {
1020         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1021 }
1022 EXPORT_SYMBOL(iwl_is_monitor_mode);
1023
1024 /**
1025  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1026  *
1027  * Selects how many and which Rx receivers/antennas/chains to use.
1028  * This should not be used for scan command ... it puts data in wrong place.
1029  */
1030 void iwl_set_rxon_chain(struct iwl_priv *priv)
1031 {
1032         bool is_single = is_single_rx_stream(priv);
1033         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1034         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1035         u32 active_chains;
1036         u16 rx_chain;
1037
1038         /* Tell uCode which antennas are actually connected.
1039          * Before first association, we assume all antennas are connected.
1040          * Just after first association, iwl_chain_noise_calibration()
1041          *    checks which antennas actually *are* connected. */
1042          if (priv->chain_noise_data.active_chains)
1043                 active_chains = priv->chain_noise_data.active_chains;
1044         else
1045                 active_chains = priv->hw_params.valid_rx_ant;
1046
1047         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1048
1049         /* How many receivers should we use? */
1050         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1051         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1052
1053
1054         /* correct rx chain count according hw settings
1055          * and chain noise calibration
1056          */
1057         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1058         if (valid_rx_cnt < active_rx_cnt)
1059                 active_rx_cnt = valid_rx_cnt;
1060
1061         if (valid_rx_cnt < idle_rx_cnt)
1062                 idle_rx_cnt = valid_rx_cnt;
1063
1064         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1065         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1066
1067         /* copied from 'iwl_bg_request_scan()' */
1068         /* Force use of chains B and C (0x6) for Rx for 4965
1069          * Avoid A (0x1) because of its off-channel reception on A-band.
1070          * MIMO is not used here, but value is required */
1071         if (iwl_is_monitor_mode(priv) &&
1072             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1073             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1074                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1075                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1076                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1077                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1078         }
1079
1080         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1081
1082         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1083                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1084         else
1085                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1086
1087         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1088                         priv->staging_rxon.rx_chain,
1089                         active_rx_cnt, idle_rx_cnt);
1090
1091         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1092                 active_rx_cnt < idle_rx_cnt);
1093 }
1094 EXPORT_SYMBOL(iwl_set_rxon_chain);
1095
1096 /**
1097  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1098  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1099  * @channel: Any channel valid for the requested phymode
1100
1101  * In addition to setting the staging RXON, priv->phymode is also set.
1102  *
1103  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1104  * in the staging RXON flag structure based on the phymode
1105  */
1106 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1107 {
1108         enum ieee80211_band band = ch->band;
1109         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1110
1111         if (!iwl_get_channel_info(priv, band, channel)) {
1112                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1113                                channel, band);
1114                 return -EINVAL;
1115         }
1116
1117         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1118             (priv->band == band))
1119                 return 0;
1120
1121         priv->staging_rxon.channel = cpu_to_le16(channel);
1122         if (band == IEEE80211_BAND_5GHZ)
1123                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1124         else
1125                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1126
1127         priv->band = band;
1128
1129         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1130
1131         return 0;
1132 }
1133 EXPORT_SYMBOL(iwl_set_rxon_channel);
1134
1135 void iwl_set_flags_for_band(struct iwl_priv *priv,
1136                             enum ieee80211_band band)
1137 {
1138         if (band == IEEE80211_BAND_5GHZ) {
1139                 priv->staging_rxon.flags &=
1140                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1141                       | RXON_FLG_CCK_MSK);
1142                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1143         } else {
1144                 /* Copied from iwl_post_associate() */
1145                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1146                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1147                 else
1148                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1149
1150                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1151                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1152
1153                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1154                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1155                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1156         }
1157 }
1158
1159 /*
1160  * initialize rxon structure with default values from eeprom
1161  */
1162 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1163 {
1164         const struct iwl_channel_info *ch_info;
1165
1166         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1167
1168         switch (mode) {
1169         case NL80211_IFTYPE_AP:
1170                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1171                 break;
1172
1173         case NL80211_IFTYPE_STATION:
1174                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1175                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1176                 break;
1177
1178         case NL80211_IFTYPE_ADHOC:
1179                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1180                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1181                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1182                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1183                 break;
1184
1185         default:
1186                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1187                 break;
1188         }
1189
1190 #if 0
1191         /* TODO:  Figure out when short_preamble would be set and cache from
1192          * that */
1193         if (!hw_to_local(priv->hw)->short_preamble)
1194                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1195         else
1196                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1197 #endif
1198
1199         ch_info = iwl_get_channel_info(priv, priv->band,
1200                                        le16_to_cpu(priv->active_rxon.channel));
1201
1202         if (!ch_info)
1203                 ch_info = &priv->channel_info[0];
1204
1205         /*
1206          * in some case A channels are all non IBSS
1207          * in this case force B/G channel
1208          */
1209         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1210             !(is_channel_ibss(ch_info)))
1211                 ch_info = &priv->channel_info[0];
1212
1213         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1214         priv->band = ch_info->band;
1215
1216         iwl_set_flags_for_band(priv, priv->band);
1217
1218         priv->staging_rxon.ofdm_basic_rates =
1219             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1220         priv->staging_rxon.cck_basic_rates =
1221             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1222
1223         /* clear both MIX and PURE40 mode flag */
1224         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1225                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1226         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1227         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1228         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1229         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1230         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1231 }
1232 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1233
1234 static void iwl_set_rate(struct iwl_priv *priv)
1235 {
1236         const struct ieee80211_supported_band *hw = NULL;
1237         struct ieee80211_rate *rate;
1238         int i;
1239
1240         hw = iwl_get_hw_mode(priv, priv->band);
1241         if (!hw) {
1242                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1243                 return;
1244         }
1245
1246         priv->active_rate = 0;
1247         priv->active_rate_basic = 0;
1248
1249         for (i = 0; i < hw->n_bitrates; i++) {
1250                 rate = &(hw->bitrates[i]);
1251                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1252                         priv->active_rate |= (1 << rate->hw_value);
1253         }
1254
1255         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1256                        priv->active_rate, priv->active_rate_basic);
1257
1258         /*
1259          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1260          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1261          * OFDM
1262          */
1263         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1264                 priv->staging_rxon.cck_basic_rates =
1265                     ((priv->active_rate_basic &
1266                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1267         else
1268                 priv->staging_rxon.cck_basic_rates =
1269                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1270
1271         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1272                 priv->staging_rxon.ofdm_basic_rates =
1273                     ((priv->active_rate_basic &
1274                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1275                       IWL_FIRST_OFDM_RATE) & 0xFF;
1276         else
1277                 priv->staging_rxon.ofdm_basic_rates =
1278                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1279 }
1280
1281 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1282 {
1283         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1284         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1285         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1286         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1287                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1288         rxon->channel = csa->channel;
1289         priv->staging_rxon.channel = csa->channel;
1290 }
1291 EXPORT_SYMBOL(iwl_rx_csa);
1292
1293 #ifdef CONFIG_IWLWIFI_DEBUG
1294 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1295 {
1296         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1297
1298         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1299         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1300         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1301         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1302         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1303                         le32_to_cpu(rxon->filter_flags));
1304         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1305         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1306                         rxon->ofdm_basic_rates);
1307         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1308         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1309         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1310         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1311 }
1312
1313 static const char *desc_lookup_text[] = {
1314         "OK",
1315         "FAIL",
1316         "BAD_PARAM",
1317         "BAD_CHECKSUM",
1318         "NMI_INTERRUPT_WDG",
1319         "SYSASSERT",
1320         "FATAL_ERROR",
1321         "BAD_COMMAND",
1322         "HW_ERROR_TUNE_LOCK",
1323         "HW_ERROR_TEMPERATURE",
1324         "ILLEGAL_CHAN_FREQ",
1325         "VCC_NOT_STABLE",
1326         "FH_ERROR",
1327         "NMI_INTERRUPT_HOST",
1328         "NMI_INTERRUPT_ACTION_PT",
1329         "NMI_INTERRUPT_UNKNOWN",
1330         "UCODE_VERSION_MISMATCH",
1331         "HW_ERROR_ABS_LOCK",
1332         "HW_ERROR_CAL_LOCK_FAIL",
1333         "NMI_INTERRUPT_INST_ACTION_PT",
1334         "NMI_INTERRUPT_DATA_ACTION_PT",
1335         "NMI_TRM_HW_ER",
1336         "NMI_INTERRUPT_TRM",
1337         "NMI_INTERRUPT_BREAK_POINT"
1338         "DEBUG_0",
1339         "DEBUG_1",
1340         "DEBUG_2",
1341         "DEBUG_3",
1342         "UNKNOWN"
1343 };
1344
1345 static const char *desc_lookup(int i)
1346 {
1347         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1348
1349         if (i < 0 || i > max)
1350                 i = max;
1351
1352         return desc_lookup_text[i];
1353 }
1354
1355 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1356 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1357
1358 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1359 {
1360         u32 data2, line;
1361         u32 desc, time, count, base, data1;
1362         u32 blink1, blink2, ilink1, ilink2;
1363
1364         if (priv->ucode_type == UCODE_INIT)
1365                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1366         else
1367                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1368
1369         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1370                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1371                 return;
1372         }
1373
1374         count = iwl_read_targ_mem(priv, base);
1375
1376         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1377                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1378                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1379                         priv->status, count);
1380         }
1381
1382         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1383         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1384         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1385         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1386         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1387         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1388         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1389         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1390         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1391
1392         IWL_ERR(priv, "Desc                               Time       "
1393                 "data1      data2      line\n");
1394         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1395                 desc_lookup(desc), desc, time, data1, data2, line);
1396         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1397         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1398                 ilink1, ilink2);
1399
1400 }
1401
1402 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1403
1404 /**
1405  * iwl_print_event_log - Dump error event log to syslog
1406  *
1407  */
1408 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1409                                 u32 num_events, u32 mode)
1410 {
1411         u32 i;
1412         u32 base;       /* SRAM byte address of event log header */
1413         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1414         u32 ptr;        /* SRAM byte address of log data */
1415         u32 ev, time, data; /* event log data */
1416
1417         if (num_events == 0)
1418                 return;
1419         if (priv->ucode_type == UCODE_INIT)
1420                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1421         else
1422                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1423
1424         if (mode == 0)
1425                 event_size = 2 * sizeof(u32);
1426         else
1427                 event_size = 3 * sizeof(u32);
1428
1429         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1430
1431         /* "time" is actually "data" for mode 0 (no timestamp).
1432         * place event id # at far right for easier visual parsing. */
1433         for (i = 0; i < num_events; i++) {
1434                 ev = iwl_read_targ_mem(priv, ptr);
1435                 ptr += sizeof(u32);
1436                 time = iwl_read_targ_mem(priv, ptr);
1437                 ptr += sizeof(u32);
1438                 if (mode == 0) {
1439                         /* data, ev */
1440                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1441                 } else {
1442                         data = iwl_read_targ_mem(priv, ptr);
1443                         ptr += sizeof(u32);
1444                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1445                                         time, data, ev);
1446                 }
1447         }
1448 }
1449
1450 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1451 {
1452         u32 base;       /* SRAM byte address of event log header */
1453         u32 capacity;   /* event log capacity in # entries */
1454         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1455         u32 num_wraps;  /* # times uCode wrapped to top of log */
1456         u32 next_entry; /* index of next entry to be written by uCode */
1457         u32 size;       /* # entries that we'll print */
1458
1459         if (priv->ucode_type == UCODE_INIT)
1460                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1461         else
1462                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1463
1464         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1465                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1466                 return;
1467         }
1468
1469         /* event log header */
1470         capacity = iwl_read_targ_mem(priv, base);
1471         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1472         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1473         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1474
1475         size = num_wraps ? capacity : next_entry;
1476
1477         /* bail out if nothing in log */
1478         if (size == 0) {
1479                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1480                 return;
1481         }
1482
1483         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1484                         size, num_wraps);
1485
1486         /* if uCode has wrapped back to top of log, start at the oldest entry,
1487          * i.e the next one that uCode would fill. */
1488         if (num_wraps)
1489                 iwl_print_event_log(priv, next_entry,
1490                                         capacity - next_entry, mode);
1491         /* (then/else) start at top of log */
1492         iwl_print_event_log(priv, 0, next_entry, mode);
1493
1494 }
1495 #endif
1496 /**
1497  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1498  */
1499 void iwl_irq_handle_error(struct iwl_priv *priv)
1500 {
1501         /* Set the FW error flag -- cleared on iwl_down */
1502         set_bit(STATUS_FW_ERROR, &priv->status);
1503
1504         /* Cancel currently queued command. */
1505         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1506
1507 #ifdef CONFIG_IWLWIFI_DEBUG
1508         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1509                 iwl_dump_nic_error_log(priv);
1510                 iwl_dump_nic_event_log(priv);
1511                 iwl_print_rx_config_cmd(priv);
1512         }
1513 #endif
1514
1515         wake_up_interruptible(&priv->wait_command_queue);
1516
1517         /* Keep the restart process from trying to send host
1518          * commands by clearing the INIT status bit */
1519         clear_bit(STATUS_READY, &priv->status);
1520
1521         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1522                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1523                           "Restarting adapter due to uCode error.\n");
1524
1525                 if (priv->cfg->mod_params->restart_fw)
1526                         queue_work(priv->workqueue, &priv->restart);
1527         }
1528 }
1529 EXPORT_SYMBOL(iwl_irq_handle_error);
1530
1531 void iwl_configure_filter(struct ieee80211_hw *hw,
1532                           unsigned int changed_flags,
1533                           unsigned int *total_flags,
1534                           u64 multicast)
1535 {
1536         struct iwl_priv *priv = hw->priv;
1537         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1538
1539         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1540                         changed_flags, *total_flags);
1541
1542         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1543                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1544                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1545                 else
1546                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1547         }
1548         if (changed_flags & FIF_ALLMULTI) {
1549                 if (*total_flags & FIF_ALLMULTI)
1550                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1551                 else
1552                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1553         }
1554         if (changed_flags & FIF_CONTROL) {
1555                 if (*total_flags & FIF_CONTROL)
1556                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1557                 else
1558                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1559         }
1560         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1561                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1562                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1563                 else
1564                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1565         }
1566
1567         /* We avoid iwl_commit_rxon here to commit the new filter flags
1568          * since mac80211 will call ieee80211_hw_config immediately.
1569          * (mc_list is not supported at this time). Otherwise, we need to
1570          * queue a background iwl_commit_rxon work.
1571          */
1572
1573         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1574                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1575 }
1576 EXPORT_SYMBOL(iwl_configure_filter);
1577
1578 int iwl_setup_mac(struct iwl_priv *priv)
1579 {
1580         int ret;
1581         struct ieee80211_hw *hw = priv->hw;
1582         hw->rate_control_algorithm = "iwl-agn-rs";
1583
1584         /* Tell mac80211 our characteristics */
1585         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1586                     IEEE80211_HW_NOISE_DBM |
1587                     IEEE80211_HW_AMPDU_AGGREGATION |
1588                     IEEE80211_HW_SPECTRUM_MGMT;
1589
1590         if (!priv->cfg->broken_powersave)
1591                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
1592                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
1593
1594         hw->wiphy->interface_modes =
1595                 BIT(NL80211_IFTYPE_STATION) |
1596                 BIT(NL80211_IFTYPE_ADHOC);
1597
1598         hw->wiphy->custom_regulatory = true;
1599
1600         /* Firmware does not support this */
1601         hw->wiphy->disable_beacon_hints = true;
1602
1603         /*
1604          * For now, disable PS by default because it affects
1605          * RX performance significantly.
1606          */
1607         hw->wiphy->ps_default = false;
1608
1609         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1610         /* we create the 802.11 header and a zero-length SSID element */
1611         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1612
1613         /* Default value; 4 EDCA QOS priorities */
1614         hw->queues = 4;
1615
1616         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1617
1618         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1619                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1620                         &priv->bands[IEEE80211_BAND_2GHZ];
1621         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1622                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1623                         &priv->bands[IEEE80211_BAND_5GHZ];
1624
1625         ret = ieee80211_register_hw(priv->hw);
1626         if (ret) {
1627                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1628                 return ret;
1629         }
1630         priv->mac80211_registered = 1;
1631
1632         return 0;
1633 }
1634 EXPORT_SYMBOL(iwl_setup_mac);
1635
1636 int iwl_set_hw_params(struct iwl_priv *priv)
1637 {
1638         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1639         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1640         if (priv->cfg->mod_params->amsdu_size_8K)
1641                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1642         else
1643                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1644         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1645
1646         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1647
1648         if (priv->cfg->mod_params->disable_11n)
1649                 priv->cfg->sku &= ~IWL_SKU_N;
1650
1651         /* Device-specific setup */
1652         return priv->cfg->ops->lib->set_hw_params(priv);
1653 }
1654 EXPORT_SYMBOL(iwl_set_hw_params);
1655
1656 int iwl_init_drv(struct iwl_priv *priv)
1657 {
1658         int ret;
1659
1660         priv->ibss_beacon = NULL;
1661
1662         spin_lock_init(&priv->lock);
1663         spin_lock_init(&priv->sta_lock);
1664         spin_lock_init(&priv->hcmd_lock);
1665
1666         INIT_LIST_HEAD(&priv->free_frames);
1667
1668         mutex_init(&priv->mutex);
1669
1670         /* Clear the driver's (not device's) station table */
1671         iwl_clear_stations_table(priv);
1672
1673         priv->data_retry_limit = -1;
1674         priv->ieee_channels = NULL;
1675         priv->ieee_rates = NULL;
1676         priv->band = IEEE80211_BAND_2GHZ;
1677
1678         priv->iw_mode = NL80211_IFTYPE_STATION;
1679
1680         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1681
1682         /* Choose which receivers/antennas to use */
1683         if (priv->cfg->ops->hcmd->set_rxon_chain)
1684                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1685
1686         iwl_init_scan_params(priv);
1687
1688         iwl_reset_qos(priv);
1689
1690         priv->qos_data.qos_active = 0;
1691         priv->qos_data.qos_cap.val = 0;
1692
1693         priv->rates_mask = IWL_RATES_MASK;
1694         /* Set the tx_power_user_lmt to the lowest power level
1695          * this value will get overwritten by channel max power avg
1696          * from eeprom */
1697         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
1698
1699         ret = iwl_init_channel_map(priv);
1700         if (ret) {
1701                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1702                 goto err;
1703         }
1704
1705         ret = iwlcore_init_geos(priv);
1706         if (ret) {
1707                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1708                 goto err_free_channel_map;
1709         }
1710         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1711
1712         return 0;
1713
1714 err_free_channel_map:
1715         iwl_free_channel_map(priv);
1716 err:
1717         return ret;
1718 }
1719 EXPORT_SYMBOL(iwl_init_drv);
1720
1721 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1722 {
1723         int ret = 0;
1724         s8 prev_tx_power = priv->tx_power_user_lmt;
1725
1726         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1727                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1728                          tx_power,
1729                          IWL_TX_POWER_TARGET_POWER_MIN);
1730                 return -EINVAL;
1731         }
1732
1733         if (tx_power > priv->tx_power_device_lmt) {
1734                 IWL_WARN(priv,
1735                         "Requested user TXPOWER %d above upper limit %d.\n",
1736                          tx_power, priv->tx_power_device_lmt);
1737                 return -EINVAL;
1738         }
1739
1740         if (priv->tx_power_user_lmt != tx_power)
1741                 force = true;
1742
1743         /* if nic is not up don't send command */
1744         if (iwl_is_ready_rf(priv)) {
1745                 priv->tx_power_user_lmt = tx_power;
1746                 if (force && priv->cfg->ops->lib->send_tx_power)
1747                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1748                 else if (!priv->cfg->ops->lib->send_tx_power)
1749                         ret = -EOPNOTSUPP;
1750                 /*
1751                  * if fail to set tx_power, restore the orig. tx power
1752                  */
1753                 if (ret)
1754                         priv->tx_power_user_lmt = prev_tx_power;
1755         }
1756
1757         /*
1758          * Even this is an async host command, the command
1759          * will always report success from uCode
1760          * So once driver can placing the command into the queue
1761          * successfully, driver can use priv->tx_power_user_lmt
1762          * to reflect the current tx power
1763          */
1764         return ret;
1765 }
1766 EXPORT_SYMBOL(iwl_set_tx_power);
1767
1768 void iwl_uninit_drv(struct iwl_priv *priv)
1769 {
1770         iwl_calib_free_results(priv);
1771         iwlcore_free_geos(priv);
1772         iwl_free_channel_map(priv);
1773         kfree(priv->scan);
1774 }
1775 EXPORT_SYMBOL(iwl_uninit_drv);
1776
1777 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1778
1779 /* Free dram table */
1780 void iwl_free_isr_ict(struct iwl_priv *priv)
1781 {
1782         if (priv->ict_tbl_vir) {
1783                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1784                                         PAGE_SIZE, priv->ict_tbl_vir,
1785                                         priv->ict_tbl_dma);
1786                 priv->ict_tbl_vir = NULL;
1787         }
1788 }
1789 EXPORT_SYMBOL(iwl_free_isr_ict);
1790
1791
1792 /* allocate dram shared table it is a PAGE_SIZE aligned
1793  * also reset all data related to ICT table interrupt.
1794  */
1795 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1796 {
1797
1798         if (priv->cfg->use_isr_legacy)
1799                 return 0;
1800         /* allocate shrared data table */
1801         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1802                                                   ICT_COUNT) + PAGE_SIZE,
1803                                                   &priv->ict_tbl_dma);
1804         if (!priv->ict_tbl_vir)
1805                 return -ENOMEM;
1806
1807         /* align table to PAGE_SIZE boundry */
1808         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1809
1810         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1811                              (unsigned long long)priv->ict_tbl_dma,
1812                              (unsigned long long)priv->aligned_ict_tbl_dma,
1813                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1814
1815         priv->ict_tbl =  priv->ict_tbl_vir +
1816                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1817
1818         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1819                              priv->ict_tbl, priv->ict_tbl_vir,
1820                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1821
1822         /* reset table and index to all 0 */
1823         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1824         priv->ict_index = 0;
1825
1826         /* add periodic RX interrupt */
1827         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1828         return 0;
1829 }
1830 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1831
1832 /* Device is going up inform it about using ICT interrupt table,
1833  * also we need to tell the driver to start using ICT interrupt.
1834  */
1835 int iwl_reset_ict(struct iwl_priv *priv)
1836 {
1837         u32 val;
1838         unsigned long flags;
1839
1840         if (!priv->ict_tbl_vir)
1841                 return 0;
1842
1843         spin_lock_irqsave(&priv->lock, flags);
1844         iwl_disable_interrupts(priv);
1845
1846         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1847
1848         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1849
1850         val |= CSR_DRAM_INT_TBL_ENABLE;
1851         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1852
1853         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1854                         "aligned dma address %Lx\n",
1855                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1856
1857         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1858         priv->use_ict = true;
1859         priv->ict_index = 0;
1860         iwl_write32(priv, CSR_INT, priv->inta_mask);
1861         iwl_enable_interrupts(priv);
1862         spin_unlock_irqrestore(&priv->lock, flags);
1863
1864         return 0;
1865 }
1866 EXPORT_SYMBOL(iwl_reset_ict);
1867
1868 /* Device is going down disable ict interrupt usage */
1869 void iwl_disable_ict(struct iwl_priv *priv)
1870 {
1871         unsigned long flags;
1872
1873         spin_lock_irqsave(&priv->lock, flags);
1874         priv->use_ict = false;
1875         spin_unlock_irqrestore(&priv->lock, flags);
1876 }
1877 EXPORT_SYMBOL(iwl_disable_ict);
1878
1879 /* interrupt handler using ict table, with this interrupt driver will
1880  * stop using INTA register to get device's interrupt, reading this register
1881  * is expensive, device will write interrupts in ICT dram table, increment
1882  * index then will fire interrupt to driver, driver will OR all ICT table
1883  * entries from current index up to table entry with 0 value. the result is
1884  * the interrupt we need to service, driver will set the entries back to 0 and
1885  * set index.
1886  */
1887 irqreturn_t iwl_isr_ict(int irq, void *data)
1888 {
1889         struct iwl_priv *priv = data;
1890         u32 inta, inta_mask;
1891         u32 val = 0;
1892
1893         if (!priv)
1894                 return IRQ_NONE;
1895
1896         /* dram interrupt table not set yet,
1897          * use legacy interrupt.
1898          */
1899         if (!priv->use_ict)
1900                 return iwl_isr(irq, data);
1901
1902         spin_lock(&priv->lock);
1903
1904         /* Disable (but don't clear!) interrupts here to avoid
1905          * back-to-back ISRs and sporadic interrupts from our NIC.
1906          * If we have something to service, the tasklet will re-enable ints.
1907          * If we *don't* have something, we'll re-enable before leaving here.
1908          */
1909         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1910         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1911
1912
1913         /* Ignore interrupt if there's nothing in NIC to service.
1914          * This may be due to IRQ shared with another device,
1915          * or due to sporadic interrupts thrown from our NIC. */
1916         if (!priv->ict_tbl[priv->ict_index]) {
1917                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1918                 goto none;
1919         }
1920
1921         /* read all entries that not 0 start with ict_index */
1922         while (priv->ict_tbl[priv->ict_index]) {
1923
1924                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1925                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1926                                 priv->ict_index,
1927                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1928                 priv->ict_tbl[priv->ict_index] = 0;
1929                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1930                                                      ICT_COUNT);
1931
1932         }
1933
1934         /* We should not get this value, just ignore it. */
1935         if (val == 0xffffffff)
1936                 val = 0;
1937
1938         inta = (0xff & val) | ((0xff00 & val) << 16);
1939         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1940                         inta, inta_mask, val);
1941
1942         inta &= priv->inta_mask;
1943         priv->inta |= inta;
1944
1945         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1946         if (likely(inta))
1947                 tasklet_schedule(&priv->irq_tasklet);
1948         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1949                 /* Allow interrupt if was disabled by this handler and
1950                  * no tasklet was schedules, We should not enable interrupt,
1951                  * tasklet will enable it.
1952                  */
1953                 iwl_enable_interrupts(priv);
1954         }
1955
1956         spin_unlock(&priv->lock);
1957         return IRQ_HANDLED;
1958
1959  none:
1960         /* re-enable interrupts here since we don't have anything to service.
1961          * only Re-enable if disabled by irq.
1962          */
1963         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1964                 iwl_enable_interrupts(priv);
1965
1966         spin_unlock(&priv->lock);
1967         return IRQ_NONE;
1968 }
1969 EXPORT_SYMBOL(iwl_isr_ict);
1970
1971
1972 static irqreturn_t iwl_isr(int irq, void *data)
1973 {
1974         struct iwl_priv *priv = data;
1975         u32 inta, inta_mask;
1976 #ifdef CONFIG_IWLWIFI_DEBUG
1977         u32 inta_fh;
1978 #endif
1979         if (!priv)
1980                 return IRQ_NONE;
1981
1982         spin_lock(&priv->lock);
1983
1984         /* Disable (but don't clear!) interrupts here to avoid
1985          *    back-to-back ISRs and sporadic interrupts from our NIC.
1986          * If we have something to service, the tasklet will re-enable ints.
1987          * If we *don't* have something, we'll re-enable before leaving here. */
1988         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1989         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1990
1991         /* Discover which interrupts are active/pending */
1992         inta = iwl_read32(priv, CSR_INT);
1993
1994         /* Ignore interrupt if there's nothing in NIC to service.
1995          * This may be due to IRQ shared with another device,
1996          * or due to sporadic interrupts thrown from our NIC. */
1997         if (!inta) {
1998                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1999                 goto none;
2000         }
2001
2002         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2003                 /* Hardware disappeared. It might have already raised
2004                  * an interrupt */
2005                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2006                 goto unplugged;
2007         }
2008
2009 #ifdef CONFIG_IWLWIFI_DEBUG
2010         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
2011                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2012                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
2013                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
2014         }
2015 #endif
2016
2017         priv->inta |= inta;
2018         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2019         if (likely(inta))
2020                 tasklet_schedule(&priv->irq_tasklet);
2021         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
2022                 iwl_enable_interrupts(priv);
2023
2024  unplugged:
2025         spin_unlock(&priv->lock);
2026         return IRQ_HANDLED;
2027
2028  none:
2029         /* re-enable interrupts here since we don't have anything to service. */
2030         /* only Re-enable if diabled by irq  and no schedules tasklet. */
2031         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
2032                 iwl_enable_interrupts(priv);
2033
2034         spin_unlock(&priv->lock);
2035         return IRQ_NONE;
2036 }
2037
2038 irqreturn_t iwl_isr_legacy(int irq, void *data)
2039 {
2040         struct iwl_priv *priv = data;
2041         u32 inta, inta_mask;
2042         u32 inta_fh;
2043         if (!priv)
2044                 return IRQ_NONE;
2045
2046         spin_lock(&priv->lock);
2047
2048         /* Disable (but don't clear!) interrupts here to avoid
2049          *    back-to-back ISRs and sporadic interrupts from our NIC.
2050          * If we have something to service, the tasklet will re-enable ints.
2051          * If we *don't* have something, we'll re-enable before leaving here. */
2052         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2053         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2054
2055         /* Discover which interrupts are active/pending */
2056         inta = iwl_read32(priv, CSR_INT);
2057         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2058
2059         /* Ignore interrupt if there's nothing in NIC to service.
2060          * This may be due to IRQ shared with another device,
2061          * or due to sporadic interrupts thrown from our NIC. */
2062         if (!inta && !inta_fh) {
2063                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
2064                 goto none;
2065         }
2066
2067         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2068                 /* Hardware disappeared. It might have already raised
2069                  * an interrupt */
2070                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2071                 goto unplugged;
2072         }
2073
2074         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2075                       inta, inta_mask, inta_fh);
2076
2077         inta &= ~CSR_INT_BIT_SCD;
2078
2079         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2080         if (likely(inta || inta_fh))
2081                 tasklet_schedule(&priv->irq_tasklet);
2082
2083  unplugged:
2084         spin_unlock(&priv->lock);
2085         return IRQ_HANDLED;
2086
2087  none:
2088         /* re-enable interrupts here since we don't have anything to service. */
2089         /* only Re-enable if diabled by irq */
2090         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2091                 iwl_enable_interrupts(priv);
2092         spin_unlock(&priv->lock);
2093         return IRQ_NONE;
2094 }
2095 EXPORT_SYMBOL(iwl_isr_legacy);
2096
2097 int iwl_send_bt_config(struct iwl_priv *priv)
2098 {
2099         struct iwl_bt_cmd bt_cmd = {
2100                 .flags = 3,
2101                 .lead_time = 0xAA,
2102                 .max_kill = 1,
2103                 .kill_ack_mask = 0,
2104                 .kill_cts_mask = 0,
2105         };
2106
2107         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
2108                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
2109 }
2110 EXPORT_SYMBOL(iwl_send_bt_config);
2111
2112 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
2113 {
2114         u32 stat_flags = 0;
2115         struct iwl_host_cmd cmd = {
2116                 .id = REPLY_STATISTICS_CMD,
2117                 .flags = flags,
2118                 .len = sizeof(stat_flags),
2119                 .data = (u8 *) &stat_flags,
2120         };
2121         return iwl_send_cmd(priv, &cmd);
2122 }
2123 EXPORT_SYMBOL(iwl_send_statistics_request);
2124
2125 /**
2126  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
2127  *   using sample data 100 bytes apart.  If these sample points are good,
2128  *   it's a pretty good bet that everything between them is good, too.
2129  */
2130 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2131 {
2132         u32 val;
2133         int ret = 0;
2134         u32 errcnt = 0;
2135         u32 i;
2136
2137         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2138
2139         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2140                 /* read data comes through single port, auto-incr addr */
2141                 /* NOTE: Use the debugless read so we don't flood kernel log
2142                  * if IWL_DL_IO is set */
2143                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2144                         i + IWL49_RTC_INST_LOWER_BOUND);
2145                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2146                 if (val != le32_to_cpu(*image)) {
2147                         ret = -EIO;
2148                         errcnt++;
2149                         if (errcnt >= 3)
2150                                 break;
2151                 }
2152         }
2153
2154         return ret;
2155 }
2156
2157 /**
2158  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
2159  *     looking at all data.
2160  */
2161 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
2162                                  u32 len)
2163 {
2164         u32 val;
2165         u32 save_len = len;
2166         int ret = 0;
2167         u32 errcnt;
2168
2169         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2170
2171         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2172                            IWL49_RTC_INST_LOWER_BOUND);
2173
2174         errcnt = 0;
2175         for (; len > 0; len -= sizeof(u32), image++) {
2176                 /* read data comes through single port, auto-incr addr */
2177                 /* NOTE: Use the debugless read so we don't flood kernel log
2178                  * if IWL_DL_IO is set */
2179                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2180                 if (val != le32_to_cpu(*image)) {
2181                         IWL_ERR(priv, "uCode INST section is invalid at "
2182                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2183                                   save_len - len, val, le32_to_cpu(*image));
2184                         ret = -EIO;
2185                         errcnt++;
2186                         if (errcnt >= 20)
2187                                 break;
2188                 }
2189         }
2190
2191         if (!errcnt)
2192                 IWL_DEBUG_INFO(priv,
2193                     "ucode image in INSTRUCTION memory is good\n");
2194
2195         return ret;
2196 }
2197
2198 /**
2199  * iwl_verify_ucode - determine which instruction image is in SRAM,
2200  *    and verify its contents
2201  */
2202 int iwl_verify_ucode(struct iwl_priv *priv)
2203 {
2204         __le32 *image;
2205         u32 len;
2206         int ret;
2207
2208         /* Try bootstrap */
2209         image = (__le32 *)priv->ucode_boot.v_addr;
2210         len = priv->ucode_boot.len;
2211         ret = iwlcore_verify_inst_sparse(priv, image, len);
2212         if (!ret) {
2213                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2214                 return 0;
2215         }
2216
2217         /* Try initialize */
2218         image = (__le32 *)priv->ucode_init.v_addr;
2219         len = priv->ucode_init.len;
2220         ret = iwlcore_verify_inst_sparse(priv, image, len);
2221         if (!ret) {
2222                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2223                 return 0;
2224         }
2225
2226         /* Try runtime/protocol */
2227         image = (__le32 *)priv->ucode_code.v_addr;
2228         len = priv->ucode_code.len;
2229         ret = iwlcore_verify_inst_sparse(priv, image, len);
2230         if (!ret) {
2231                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2232                 return 0;
2233         }
2234
2235         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2236
2237         /* Since nothing seems to match, show first several data entries in
2238          * instruction SRAM, so maybe visual inspection will give a clue.
2239          * Selection of bootstrap image (vs. other images) is arbitrary. */
2240         image = (__le32 *)priv->ucode_boot.v_addr;
2241         len = priv->ucode_boot.len;
2242         ret = iwl_verify_inst_full(priv, image, len);
2243
2244         return ret;
2245 }
2246 EXPORT_SYMBOL(iwl_verify_ucode);
2247
2248
2249 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2250 {
2251         struct iwl_ct_kill_config cmd;
2252         struct iwl_ct_kill_throttling_config adv_cmd;
2253         unsigned long flags;
2254         int ret = 0;
2255
2256         spin_lock_irqsave(&priv->lock, flags);
2257         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2258                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2259         spin_unlock_irqrestore(&priv->lock, flags);
2260         priv->thermal_throttle.ct_kill_toggle = false;
2261
2262         switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
2263         case CSR_HW_REV_TYPE_1000:
2264         case CSR_HW_REV_TYPE_6x00:
2265         case CSR_HW_REV_TYPE_6x50:
2266                 adv_cmd.critical_temperature_enter =
2267                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2268                 adv_cmd.critical_temperature_exit =
2269                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2270
2271                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2272                                        sizeof(adv_cmd), &adv_cmd);
2273                 if (ret)
2274                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2275                 else
2276                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2277                                         "succeeded, "
2278                                         "critical temperature enter is %d,"
2279                                         "exit is %d\n",
2280                                        priv->hw_params.ct_kill_threshold,
2281                                        priv->hw_params.ct_kill_exit_threshold);
2282                 break;
2283         default:
2284                 cmd.critical_temperature_R =
2285                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2286
2287                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2288                                        sizeof(cmd), &cmd);
2289                 if (ret)
2290                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2291                 else
2292                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2293                                         "succeeded, "
2294                                         "critical temperature is %d\n",
2295                                         priv->hw_params.ct_kill_threshold);
2296                 break;
2297         }
2298 }
2299 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2300
2301
2302 /*
2303  * CARD_STATE_CMD
2304  *
2305  * Use: Sets the device's internal card state to enable, disable, or halt
2306  *
2307  * When in the 'enable' state the card operates as normal.
2308  * When in the 'disable' state, the card enters into a low power mode.
2309  * When in the 'halt' state, the card is shut down and must be fully
2310  * restarted to come back on.
2311  */
2312 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2313 {
2314         struct iwl_host_cmd cmd = {
2315                 .id = REPLY_CARD_STATE_CMD,
2316                 .len = sizeof(u32),
2317                 .data = &flags,
2318                 .flags = meta_flag,
2319         };
2320
2321         return iwl_send_cmd(priv, &cmd);
2322 }
2323
2324 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2325                            struct iwl_rx_mem_buffer *rxb)
2326 {
2327 #ifdef CONFIG_IWLWIFI_DEBUG
2328         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2329         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2330         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2331                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2332 #endif
2333 }
2334 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2335
2336 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2337                                       struct iwl_rx_mem_buffer *rxb)
2338 {
2339         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2340         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2341         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2342                         "notification for %s:\n", len,
2343                         get_cmd_string(pkt->hdr.cmd));
2344         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2345 }
2346 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2347
2348 void iwl_rx_reply_error(struct iwl_priv *priv,
2349                         struct iwl_rx_mem_buffer *rxb)
2350 {
2351         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2352
2353         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2354                 "seq 0x%04X ser 0x%08X\n",
2355                 le32_to_cpu(pkt->u.err_resp.error_type),
2356                 get_cmd_string(pkt->u.err_resp.cmd_id),
2357                 pkt->u.err_resp.cmd_id,
2358                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2359                 le32_to_cpu(pkt->u.err_resp.error_info));
2360 }
2361 EXPORT_SYMBOL(iwl_rx_reply_error);
2362
2363 void iwl_clear_isr_stats(struct iwl_priv *priv)
2364 {
2365         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2366 }
2367
2368 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2369                            const struct ieee80211_tx_queue_params *params)
2370 {
2371         struct iwl_priv *priv = hw->priv;
2372         unsigned long flags;
2373         int q;
2374
2375         IWL_DEBUG_MAC80211(priv, "enter\n");
2376
2377         if (!iwl_is_ready_rf(priv)) {
2378                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2379                 return -EIO;
2380         }
2381
2382         if (queue >= AC_NUM) {
2383                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2384                 return 0;
2385         }
2386
2387         q = AC_NUM - 1 - queue;
2388
2389         spin_lock_irqsave(&priv->lock, flags);
2390
2391         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2392         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2393         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2394         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2395                         cpu_to_le16((params->txop * 32));
2396
2397         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2398         priv->qos_data.qos_active = 1;
2399
2400         if (priv->iw_mode == NL80211_IFTYPE_AP)
2401                 iwl_activate_qos(priv, 1);
2402         else if (priv->assoc_id && iwl_is_associated(priv))
2403                 iwl_activate_qos(priv, 0);
2404
2405         spin_unlock_irqrestore(&priv->lock, flags);
2406
2407         IWL_DEBUG_MAC80211(priv, "leave\n");
2408         return 0;
2409 }
2410 EXPORT_SYMBOL(iwl_mac_conf_tx);
2411
2412 static void iwl_ht_conf(struct iwl_priv *priv,
2413                             struct ieee80211_bss_conf *bss_conf)
2414 {
2415         struct ieee80211_sta_ht_cap *ht_conf;
2416         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2417         struct ieee80211_sta *sta;
2418
2419         IWL_DEBUG_MAC80211(priv, "enter: \n");
2420
2421         if (!iwl_conf->is_ht)
2422                 return;
2423
2424
2425         /*
2426          * It is totally wrong to base global information on something
2427          * that is valid only when associated, alas, this driver works
2428          * that way and I don't know how to fix it.
2429          */
2430
2431         rcu_read_lock();
2432         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2433         if (!sta) {
2434                 rcu_read_unlock();
2435                 return;
2436         }
2437         ht_conf = &sta->ht_cap;
2438
2439         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2440
2441         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2442
2443         iwl_conf->ht_protection =
2444                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2445         iwl_conf->non_GF_STA_present =
2446                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2447
2448         rcu_read_unlock();
2449
2450         IWL_DEBUG_MAC80211(priv, "leave\n");
2451 }
2452
2453 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2454 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2455                           struct ieee80211_vif *vif,
2456                           struct ieee80211_bss_conf *bss_conf,
2457                           u32 changes)
2458 {
2459         struct iwl_priv *priv = hw->priv;
2460         int ret;
2461
2462         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2463
2464         if (!iwl_is_alive(priv))
2465                 return;
2466
2467         mutex_lock(&priv->mutex);
2468
2469         if (changes & BSS_CHANGED_BEACON &&
2470             priv->iw_mode == NL80211_IFTYPE_AP) {
2471                 dev_kfree_skb(priv->ibss_beacon);
2472                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2473         }
2474
2475         if (changes & BSS_CHANGED_BEACON_INT) {
2476                 priv->beacon_int = bss_conf->beacon_int;
2477                 /* TODO: in AP mode, do something to make this take effect */
2478         }
2479
2480         if (changes & BSS_CHANGED_BSSID) {
2481                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2482
2483                 /*
2484                  * If there is currently a HW scan going on in the
2485                  * background then we need to cancel it else the RXON
2486                  * below/in post_associate will fail.
2487                  */
2488                 if (iwl_scan_cancel_timeout(priv, 100)) {
2489                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2490                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2491                         mutex_unlock(&priv->mutex);
2492                         return;
2493                 }
2494
2495                 /* mac80211 only sets assoc when in STATION mode */
2496                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2497                     bss_conf->assoc) {
2498                         memcpy(priv->staging_rxon.bssid_addr,
2499                                bss_conf->bssid, ETH_ALEN);
2500
2501                         /* currently needed in a few places */
2502                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2503                 } else {
2504                         priv->staging_rxon.filter_flags &=
2505                                 ~RXON_FILTER_ASSOC_MSK;
2506                 }
2507
2508         }
2509
2510         /*
2511          * This needs to be after setting the BSSID in case
2512          * mac80211 decides to do both changes at once because
2513          * it will invoke post_associate.
2514          */
2515         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2516             changes & BSS_CHANGED_BEACON) {
2517                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2518
2519                 if (beacon)
2520                         iwl_mac_beacon_update(hw, beacon);
2521         }
2522
2523         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2524                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2525                                    bss_conf->use_short_preamble);
2526                 if (bss_conf->use_short_preamble)
2527                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2528                 else
2529                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2530         }
2531
2532         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2533                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2534                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2535                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2536                 else
2537                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2538         }
2539
2540         if (changes & BSS_CHANGED_BASIC_RATES) {
2541                 /* XXX use this information
2542                  *
2543                  * To do that, remove code from iwl_set_rate() and put something
2544                  * like this here:
2545                  *
2546                 if (A-band)
2547                         priv->staging_rxon.ofdm_basic_rates =
2548                                 bss_conf->basic_rates;
2549                 else
2550                         priv->staging_rxon.ofdm_basic_rates =
2551                                 bss_conf->basic_rates >> 4;
2552                         priv->staging_rxon.cck_basic_rates =
2553                                 bss_conf->basic_rates & 0xF;
2554                  */
2555         }
2556
2557         if (changes & BSS_CHANGED_HT) {
2558                 iwl_ht_conf(priv, bss_conf);
2559
2560                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2561                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2562         }
2563
2564         if (changes & BSS_CHANGED_ASSOC) {
2565                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2566                 if (bss_conf->assoc) {
2567                         priv->assoc_id = bss_conf->aid;
2568                         priv->beacon_int = bss_conf->beacon_int;
2569                         priv->timestamp = bss_conf->timestamp;
2570                         priv->assoc_capability = bss_conf->assoc_capability;
2571
2572                         /*
2573                          * We have just associated, don't start scan too early
2574                          * leave time for EAPOL exchange to complete.
2575                          *
2576                          * XXX: do this in mac80211
2577                          */
2578                         priv->next_scan_jiffies = jiffies +
2579                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2580                         if (!iwl_is_rfkill(priv))
2581                                 priv->cfg->ops->lib->post_associate(priv);
2582                 } else
2583                         priv->assoc_id = 0;
2584
2585         }
2586
2587         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2588                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2589                                    changes);
2590                 ret = iwl_send_rxon_assoc(priv);
2591                 if (!ret) {
2592                         /* Sync active_rxon with latest change. */
2593                         memcpy((void *)&priv->active_rxon,
2594                                 &priv->staging_rxon,
2595                                 sizeof(struct iwl_rxon_cmd));
2596                 }
2597         }
2598
2599         mutex_unlock(&priv->mutex);
2600
2601         IWL_DEBUG_MAC80211(priv, "leave\n");
2602 }
2603 EXPORT_SYMBOL(iwl_bss_info_changed);
2604
2605 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2606 {
2607         struct iwl_priv *priv = hw->priv;
2608         unsigned long flags;
2609         __le64 timestamp;
2610
2611         IWL_DEBUG_MAC80211(priv, "enter\n");
2612
2613         if (!iwl_is_ready_rf(priv)) {
2614                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2615                 return -EIO;
2616         }
2617
2618         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2619                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2620                 return -EIO;
2621         }
2622
2623         spin_lock_irqsave(&priv->lock, flags);
2624
2625         if (priv->ibss_beacon)
2626                 dev_kfree_skb(priv->ibss_beacon);
2627
2628         priv->ibss_beacon = skb;
2629
2630         priv->assoc_id = 0;
2631         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2632         priv->timestamp = le64_to_cpu(timestamp);
2633
2634         IWL_DEBUG_MAC80211(priv, "leave\n");
2635         spin_unlock_irqrestore(&priv->lock, flags);
2636
2637         iwl_reset_qos(priv);
2638
2639         priv->cfg->ops->lib->post_associate(priv);
2640
2641
2642         return 0;
2643 }
2644 EXPORT_SYMBOL(iwl_mac_beacon_update);
2645
2646 int iwl_set_mode(struct iwl_priv *priv, int mode)
2647 {
2648         if (mode == NL80211_IFTYPE_ADHOC) {
2649                 const struct iwl_channel_info *ch_info;
2650
2651                 ch_info = iwl_get_channel_info(priv,
2652                         priv->band,
2653                         le16_to_cpu(priv->staging_rxon.channel));
2654
2655                 if (!ch_info || !is_channel_ibss(ch_info)) {
2656                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2657                                   le16_to_cpu(priv->staging_rxon.channel));
2658                         return -EINVAL;
2659                 }
2660         }
2661
2662         iwl_connection_init_rx_config(priv, mode);
2663
2664         if (priv->cfg->ops->hcmd->set_rxon_chain)
2665                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2666
2667         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2668
2669         iwl_clear_stations_table(priv);
2670
2671         /* dont commit rxon if rf-kill is on*/
2672         if (!iwl_is_ready_rf(priv))
2673                 return -EAGAIN;
2674
2675         iwlcore_commit_rxon(priv);
2676
2677         return 0;
2678 }
2679 EXPORT_SYMBOL(iwl_set_mode);
2680
2681 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2682                                  struct ieee80211_if_init_conf *conf)
2683 {
2684         struct iwl_priv *priv = hw->priv;
2685         unsigned long flags;
2686
2687         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2688
2689         if (priv->vif) {
2690                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2691                 return -EOPNOTSUPP;
2692         }
2693
2694         spin_lock_irqsave(&priv->lock, flags);
2695         priv->vif = conf->vif;
2696         priv->iw_mode = conf->type;
2697
2698         spin_unlock_irqrestore(&priv->lock, flags);
2699
2700         mutex_lock(&priv->mutex);
2701
2702         if (conf->mac_addr) {
2703                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2704                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2705         }
2706
2707         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2708                 /* we are not ready, will run again when ready */
2709                 set_bit(STATUS_MODE_PENDING, &priv->status);
2710
2711         mutex_unlock(&priv->mutex);
2712
2713         IWL_DEBUG_MAC80211(priv, "leave\n");
2714         return 0;
2715 }
2716 EXPORT_SYMBOL(iwl_mac_add_interface);
2717
2718 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2719                                      struct ieee80211_if_init_conf *conf)
2720 {
2721         struct iwl_priv *priv = hw->priv;
2722
2723         IWL_DEBUG_MAC80211(priv, "enter\n");
2724
2725         mutex_lock(&priv->mutex);
2726
2727         if (iwl_is_ready_rf(priv)) {
2728                 iwl_scan_cancel_timeout(priv, 100);
2729                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2730                 iwlcore_commit_rxon(priv);
2731         }
2732         if (priv->vif == conf->vif) {
2733                 priv->vif = NULL;
2734                 memset(priv->bssid, 0, ETH_ALEN);
2735         }
2736         mutex_unlock(&priv->mutex);
2737
2738         IWL_DEBUG_MAC80211(priv, "leave\n");
2739
2740 }
2741 EXPORT_SYMBOL(iwl_mac_remove_interface);
2742
2743 /**
2744  * iwl_mac_config - mac80211 config callback
2745  *
2746  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2747  * be set inappropriately and the driver currently sets the hardware up to
2748  * use it whenever needed.
2749  */
2750 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2751 {
2752         struct iwl_priv *priv = hw->priv;
2753         const struct iwl_channel_info *ch_info;
2754         struct ieee80211_conf *conf = &hw->conf;
2755         struct iwl_ht_info *ht_conf = &priv->current_ht_config;
2756         unsigned long flags = 0;
2757         int ret = 0;
2758         u16 ch;
2759         int scan_active = 0;
2760
2761         mutex_lock(&priv->mutex);
2762
2763         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2764                                         conf->channel->hw_value, changed);
2765
2766         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2767                         test_bit(STATUS_SCANNING, &priv->status))) {
2768                 scan_active = 1;
2769                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2770         }
2771
2772
2773         /* during scanning mac80211 will delay channel setting until
2774          * scan finish with changed = 0
2775          */
2776         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2777                 if (scan_active)
2778                         goto set_ch_out;
2779
2780                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2781                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2782                 if (!is_channel_valid(ch_info)) {
2783                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2784                         ret = -EINVAL;
2785                         goto set_ch_out;
2786                 }
2787
2788                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2789                         !is_channel_ibss(ch_info)) {
2790                         IWL_ERR(priv, "channel %d in band %d not "
2791                                 "IBSS channel\n",
2792                                 conf->channel->hw_value, conf->channel->band);
2793                         ret = -EINVAL;
2794                         goto set_ch_out;
2795                 }
2796
2797                 spin_lock_irqsave(&priv->lock, flags);
2798
2799                 /* Configure HT40 channels */
2800                 ht_conf->is_ht = conf_is_ht(conf);
2801                 if (ht_conf->is_ht) {
2802                         if (conf_is_ht40_minus(conf)) {
2803                                 ht_conf->extension_chan_offset =
2804                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2805                                 ht_conf->supported_chan_width =
2806                                         IWL_CHANNEL_WIDTH_40MHZ;
2807                         } else if (conf_is_ht40_plus(conf)) {
2808                                 ht_conf->extension_chan_offset =
2809                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2810                                 ht_conf->supported_chan_width =
2811                                         IWL_CHANNEL_WIDTH_40MHZ;
2812                         } else {
2813                                 ht_conf->extension_chan_offset =
2814                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2815                                 ht_conf->supported_chan_width =
2816                                         IWL_CHANNEL_WIDTH_20MHZ;
2817                         }
2818                 } else
2819                         ht_conf->supported_chan_width = IWL_CHANNEL_WIDTH_20MHZ;
2820                 /* Default to no protection. Protection mode will later be set
2821                  * from BSS config in iwl_ht_conf */
2822                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2823
2824                 /* if we are switching from ht to 2.4 clear flags
2825                  * from any ht related info since 2.4 does not
2826                  * support ht */
2827                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2828                         priv->staging_rxon.flags = 0;
2829
2830                 iwl_set_rxon_channel(priv, conf->channel);
2831
2832                 iwl_set_flags_for_band(priv, conf->channel->band);
2833                 spin_unlock_irqrestore(&priv->lock, flags);
2834  set_ch_out:
2835                 /* The list of supported rates and rate mask can be different
2836                  * for each band; since the band may have changed, reset
2837                  * the rate mask to what mac80211 lists */
2838                 iwl_set_rate(priv);
2839         }
2840
2841         if (changed & IEEE80211_CONF_CHANGE_PS) {
2842                 ret = iwl_power_update_mode(priv, false);
2843                 if (ret)
2844                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2845         }
2846
2847         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2848                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2849                         priv->tx_power_user_lmt, conf->power_level);
2850
2851                 iwl_set_tx_power(priv, conf->power_level, false);
2852         }
2853
2854         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2855         if (priv->cfg->ops->hcmd->set_rxon_chain)
2856                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2857
2858         if (!iwl_is_ready(priv)) {
2859                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2860                 goto out;
2861         }
2862
2863         if (scan_active)
2864                 goto out;
2865
2866         if (memcmp(&priv->active_rxon,
2867                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2868                 iwlcore_commit_rxon(priv);
2869         else
2870                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2871
2872
2873 out:
2874         IWL_DEBUG_MAC80211(priv, "leave\n");
2875         mutex_unlock(&priv->mutex);
2876         return ret;
2877 }
2878 EXPORT_SYMBOL(iwl_mac_config);
2879
2880 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2881                          struct ieee80211_tx_queue_stats *stats)
2882 {
2883         struct iwl_priv *priv = hw->priv;
2884         int i, avail;
2885         struct iwl_tx_queue *txq;
2886         struct iwl_queue *q;
2887         unsigned long flags;
2888
2889         IWL_DEBUG_MAC80211(priv, "enter\n");
2890
2891         if (!iwl_is_ready_rf(priv)) {
2892                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2893                 return -EIO;
2894         }
2895
2896         spin_lock_irqsave(&priv->lock, flags);
2897
2898         for (i = 0; i < AC_NUM; i++) {
2899                 txq = &priv->txq[i];
2900                 q = &txq->q;
2901                 avail = iwl_queue_space(q);
2902
2903                 stats[i].len = q->n_window - avail;
2904                 stats[i].limit = q->n_window - q->high_mark;
2905                 stats[i].count = q->n_window;
2906
2907         }
2908         spin_unlock_irqrestore(&priv->lock, flags);
2909
2910         IWL_DEBUG_MAC80211(priv, "leave\n");
2911
2912         return 0;
2913 }
2914 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2915
2916 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2917 {
2918         struct iwl_priv *priv = hw->priv;
2919         unsigned long flags;
2920
2921         mutex_lock(&priv->mutex);
2922         IWL_DEBUG_MAC80211(priv, "enter\n");
2923
2924         spin_lock_irqsave(&priv->lock, flags);
2925         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2926         spin_unlock_irqrestore(&priv->lock, flags);
2927
2928         iwl_reset_qos(priv);
2929
2930         spin_lock_irqsave(&priv->lock, flags);
2931         priv->assoc_id = 0;
2932         priv->assoc_capability = 0;
2933         priv->assoc_station_added = 0;
2934
2935         /* new association get rid of ibss beacon skb */
2936         if (priv->ibss_beacon)
2937                 dev_kfree_skb(priv->ibss_beacon);
2938
2939         priv->ibss_beacon = NULL;
2940
2941         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2942         priv->timestamp = 0;
2943         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2944                 priv->beacon_int = 0;
2945
2946         spin_unlock_irqrestore(&priv->lock, flags);
2947
2948         if (!iwl_is_ready_rf(priv)) {
2949                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2950                 mutex_unlock(&priv->mutex);
2951                 return;
2952         }
2953
2954         /* we are restarting association process
2955          * clear RXON_FILTER_ASSOC_MSK bit
2956          */
2957         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2958                 iwl_scan_cancel_timeout(priv, 100);
2959                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2960                 iwlcore_commit_rxon(priv);
2961         }
2962
2963         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2964                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2965                 mutex_unlock(&priv->mutex);
2966                 return;
2967         }
2968
2969         iwl_set_rate(priv);
2970
2971         mutex_unlock(&priv->mutex);
2972
2973         IWL_DEBUG_MAC80211(priv, "leave\n");
2974 }
2975 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2976
2977 #ifdef CONFIG_IWLWIFI_DEBUGFS
2978
2979 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2980
2981 void iwl_reset_traffic_log(struct iwl_priv *priv)
2982 {
2983         priv->tx_traffic_idx = 0;
2984         priv->rx_traffic_idx = 0;
2985         if (priv->tx_traffic)
2986                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2987         if (priv->rx_traffic)
2988                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2989 }
2990
2991 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2992 {
2993         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2994
2995         if (iwl_debug_level & IWL_DL_TX) {
2996                 if (!priv->tx_traffic) {
2997                         priv->tx_traffic =
2998                                 kzalloc(traffic_size, GFP_KERNEL);
2999                         if (!priv->tx_traffic)
3000                                 return -ENOMEM;
3001                 }
3002         }
3003         if (iwl_debug_level & IWL_DL_RX) {
3004                 if (!priv->rx_traffic) {
3005                         priv->rx_traffic =
3006                                 kzalloc(traffic_size, GFP_KERNEL);
3007                         if (!priv->rx_traffic)
3008                                 return -ENOMEM;
3009                 }
3010         }
3011         iwl_reset_traffic_log(priv);
3012         return 0;
3013 }
3014 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
3015
3016 void iwl_free_traffic_mem(struct iwl_priv *priv)
3017 {
3018         kfree(priv->tx_traffic);
3019         priv->tx_traffic = NULL;
3020
3021         kfree(priv->rx_traffic);
3022         priv->rx_traffic = NULL;
3023 }
3024 EXPORT_SYMBOL(iwl_free_traffic_mem);
3025
3026 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
3027                       u16 length, struct ieee80211_hdr *header)
3028 {
3029         __le16 fc;
3030         u16 len;
3031
3032         if (likely(!(iwl_debug_level & IWL_DL_TX)))
3033                 return;
3034
3035         if (!priv->tx_traffic)
3036                 return;
3037
3038         fc = header->frame_control;
3039         if (ieee80211_is_data(fc)) {
3040                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
3041                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
3042                 memcpy((priv->tx_traffic +
3043                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
3044                        header, len);
3045                 priv->tx_traffic_idx =
3046                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
3047         }
3048 }
3049 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
3050
3051 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
3052                       u16 length, struct ieee80211_hdr *header)
3053 {
3054         __le16 fc;
3055         u16 len;
3056
3057         if (likely(!(iwl_debug_level & IWL_DL_RX)))
3058                 return;
3059
3060         if (!priv->rx_traffic)
3061                 return;
3062
3063         fc = header->frame_control;
3064         if (ieee80211_is_data(fc)) {
3065                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
3066                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
3067                 memcpy((priv->rx_traffic +
3068                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
3069                        header, len);
3070                 priv->rx_traffic_idx =
3071                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
3072         }
3073 }
3074 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
3075
3076 const char *get_mgmt_string(int cmd)
3077 {
3078         switch (cmd) {
3079                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
3080                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
3081                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
3082                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
3083                 IWL_CMD(MANAGEMENT_PROBE_REQ);
3084                 IWL_CMD(MANAGEMENT_PROBE_RESP);
3085                 IWL_CMD(MANAGEMENT_BEACON);
3086                 IWL_CMD(MANAGEMENT_ATIM);
3087                 IWL_CMD(MANAGEMENT_DISASSOC);
3088                 IWL_CMD(MANAGEMENT_AUTH);
3089                 IWL_CMD(MANAGEMENT_DEAUTH);
3090                 IWL_CMD(MANAGEMENT_ACTION);
3091         default:
3092                 return "UNKNOWN";
3093
3094         }
3095 }
3096
3097 const char *get_ctrl_string(int cmd)
3098 {
3099         switch (cmd) {
3100                 IWL_CMD(CONTROL_BACK_REQ);
3101                 IWL_CMD(CONTROL_BACK);
3102                 IWL_CMD(CONTROL_PSPOLL);
3103                 IWL_CMD(CONTROL_RTS);
3104                 IWL_CMD(CONTROL_CTS);
3105                 IWL_CMD(CONTROL_ACK);
3106                 IWL_CMD(CONTROL_CFEND);
3107                 IWL_CMD(CONTROL_CFENDACK);
3108         default:
3109                 return "UNKNOWN";
3110
3111         }
3112 }
3113
3114 void iwl_clear_tx_stats(struct iwl_priv *priv)
3115 {
3116         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
3117
3118 }
3119
3120 void iwl_clear_rx_stats(struct iwl_priv *priv)
3121 {
3122         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
3123 }
3124
3125 /*
3126  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
3127  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
3128  * Use debugFs to display the rx/rx_statistics
3129  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
3130  * information will be recorded, but DATA pkt still will be recorded
3131  * for the reason of iwl_led.c need to control the led blinking based on
3132  * number of tx and rx data.
3133  *
3134  */
3135 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
3136 {
3137         struct traffic_stats    *stats;
3138
3139         if (is_tx)
3140                 stats = &priv->tx_stats;
3141         else
3142                 stats = &priv->rx_stats;
3143
3144         if (ieee80211_is_mgmt(fc)) {
3145                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3146                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
3147                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
3148                         break;
3149                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3150                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
3151                         break;
3152                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
3153                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
3154                         break;
3155                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
3156                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
3157                         break;
3158                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
3159                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
3160                         break;
3161                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3162                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
3163                         break;
3164                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3165                         stats->mgmt[MANAGEMENT_BEACON]++;
3166                         break;
3167                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
3168                         stats->mgmt[MANAGEMENT_ATIM]++;
3169                         break;
3170                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
3171                         stats->mgmt[MANAGEMENT_DISASSOC]++;
3172                         break;
3173                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
3174                         stats->mgmt[MANAGEMENT_AUTH]++;
3175                         break;
3176                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3177                         stats->mgmt[MANAGEMENT_DEAUTH]++;
3178                         break;
3179                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
3180                         stats->mgmt[MANAGEMENT_ACTION]++;
3181                         break;
3182                 }
3183         } else if (ieee80211_is_ctl(fc)) {
3184                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3185                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3186                         stats->ctrl[CONTROL_BACK_REQ]++;
3187                         break;
3188                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3189                         stats->ctrl[CONTROL_BACK]++;
3190                         break;
3191                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3192                         stats->ctrl[CONTROL_PSPOLL]++;
3193                         break;
3194                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3195                         stats->ctrl[CONTROL_RTS]++;
3196                         break;
3197                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3198                         stats->ctrl[CONTROL_CTS]++;
3199                         break;
3200                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3201                         stats->ctrl[CONTROL_ACK]++;
3202                         break;
3203                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3204                         stats->ctrl[CONTROL_CFEND]++;
3205                         break;
3206                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3207                         stats->ctrl[CONTROL_CFENDACK]++;
3208                         break;
3209                 }
3210         } else {
3211                 /* data */
3212                 stats->data_cnt++;
3213                 stats->data_bytes += len;
3214         }
3215 }
3216 EXPORT_SYMBOL(iwl_update_stats);
3217 #endif
3218
3219 #ifdef CONFIG_PM
3220
3221 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3222 {
3223         struct iwl_priv *priv = pci_get_drvdata(pdev);
3224
3225         /*
3226          * This function is called when system goes into suspend state
3227          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3228          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3229          * it will not call apm_ops.stop() to stop the DMA operation.
3230          * Calling apm_ops.stop here to make sure we stop the DMA.
3231          */
3232         priv->cfg->ops->lib->apm_ops.stop(priv);
3233
3234         pci_save_state(pdev);
3235         pci_disable_device(pdev);
3236         pci_set_power_state(pdev, PCI_D3hot);
3237
3238         return 0;
3239 }
3240 EXPORT_SYMBOL(iwl_pci_suspend);
3241
3242 int iwl_pci_resume(struct pci_dev *pdev)
3243 {
3244         struct iwl_priv *priv = pci_get_drvdata(pdev);
3245         int ret;
3246
3247         pci_set_power_state(pdev, PCI_D0);
3248         ret = pci_enable_device(pdev);
3249         if (ret)
3250                 return ret;
3251         pci_restore_state(pdev);
3252         iwl_enable_interrupts(priv);
3253
3254         return 0;
3255 }
3256 EXPORT_SYMBOL(iwl_pci_resume);
3257
3258 #endif /* CONFIG_PM */