2ae168af0f2c0887b591bba4f41898798482a4b5
[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 /*
608  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
609  *  function.
610  */
611 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
612                                 __le32 *tx_flags)
613 {
614         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
615                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
616                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
617         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
618                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
619                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
620         }
621 }
622 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
623
624 static bool is_single_rx_stream(struct iwl_priv *priv)
625 {
626         return !priv->current_ht_config.is_ht ||
627                priv->current_ht_config.single_chain_sufficient;
628 }
629
630 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
631                                    enum ieee80211_band band,
632                                    u16 channel, u8 extension_chan_offset)
633 {
634         const struct iwl_channel_info *ch_info;
635
636         ch_info = iwl_get_channel_info(priv, band, channel);
637         if (!is_channel_valid(ch_info))
638                 return 0;
639
640         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
641                 return !(ch_info->ht40_extension_channel &
642                                         IEEE80211_CHAN_NO_HT40PLUS);
643         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
644                 return !(ch_info->ht40_extension_channel &
645                                         IEEE80211_CHAN_NO_HT40MINUS);
646
647         return 0;
648 }
649
650 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
651                          struct ieee80211_sta_ht_cap *sta_ht_inf)
652 {
653         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
654
655         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
656                 return 0;
657
658         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
659          * the bit will not set if it is pure 40MHz case
660          */
661         if (sta_ht_inf) {
662                 if (!sta_ht_inf->ht_supported)
663                         return 0;
664         }
665 #ifdef CONFIG_IWLWIFI_DEBUG
666         if (priv->disable_ht40)
667                 return 0;
668 #endif
669         return iwl_is_channel_extension(priv, priv->band,
670                         le16_to_cpu(priv->staging_rxon.channel),
671                         ht_conf->extension_chan_offset);
672 }
673 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
674
675 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
676 {
677         u16 new_val = 0;
678         u16 beacon_factor = 0;
679
680         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
681         new_val = beacon_val / beacon_factor;
682
683         if (!new_val)
684                 new_val = max_beacon_val;
685
686         return new_val;
687 }
688
689 void iwl_setup_rxon_timing(struct iwl_priv *priv)
690 {
691         u64 tsf;
692         s32 interval_tm, rem;
693         unsigned long flags;
694         struct ieee80211_conf *conf = NULL;
695         u16 beacon_int;
696
697         conf = ieee80211_get_hw_conf(priv->hw);
698
699         spin_lock_irqsave(&priv->lock, flags);
700         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
701         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
702
703         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
704                 beacon_int = priv->beacon_int;
705                 priv->rxon_timing.atim_window = 0;
706         } else {
707                 beacon_int = priv->vif->bss_conf.beacon_int;
708
709                 /* TODO: we need to get atim_window from upper stack
710                  * for now we set to 0 */
711                 priv->rxon_timing.atim_window = 0;
712         }
713
714         beacon_int = iwl_adjust_beacon_interval(beacon_int,
715                                 priv->hw_params.max_beacon_itrvl * 1024);
716         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
717
718         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
719         interval_tm = beacon_int * 1024;
720         rem = do_div(tsf, interval_tm);
721         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
722
723         spin_unlock_irqrestore(&priv->lock, flags);
724         IWL_DEBUG_ASSOC(priv,
725                         "beacon interval %d beacon timer %d beacon tim %d\n",
726                         le16_to_cpu(priv->rxon_timing.beacon_interval),
727                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
728                         le16_to_cpu(priv->rxon_timing.atim_window));
729 }
730 EXPORT_SYMBOL(iwl_setup_rxon_timing);
731
732 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
733 {
734         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
735
736         if (hw_decrypt)
737                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
738         else
739                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
740
741 }
742 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
743
744 /**
745  * iwl_check_rxon_cmd - validate RXON structure is valid
746  *
747  * NOTE:  This is really only useful during development and can eventually
748  * be #ifdef'd out once the driver is stable and folks aren't actively
749  * making changes
750  */
751 int iwl_check_rxon_cmd(struct iwl_priv *priv)
752 {
753         int error = 0;
754         int counter = 1;
755         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
756
757         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
758                 error |= le32_to_cpu(rxon->flags &
759                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
760                                  RXON_FLG_RADAR_DETECT_MSK));
761                 if (error)
762                         IWL_WARN(priv, "check 24G fields %d | %d\n",
763                                     counter++, error);
764         } else {
765                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
766                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
767                 if (error)
768                         IWL_WARN(priv, "check 52 fields %d | %d\n",
769                                     counter++, error);
770                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
771                 if (error)
772                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
773                                     counter++, error);
774         }
775         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
776         if (error)
777                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
778
779         /* make sure basic rates 6Mbps and 1Mbps are supported */
780         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
781                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
782         if (error)
783                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
784
785         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
786         if (error)
787                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
788
789         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
790                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
791         if (error)
792                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
793                             counter++, error);
794
795         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
796                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
797         if (error)
798                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
799                             counter++, error);
800
801         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
802                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
803         if (error)
804                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
805                             counter++, error);
806
807         if (error)
808                 IWL_WARN(priv, "Tuning to channel %d\n",
809                             le16_to_cpu(rxon->channel));
810
811         if (error) {
812                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
813                 return -1;
814         }
815         return 0;
816 }
817 EXPORT_SYMBOL(iwl_check_rxon_cmd);
818
819 /**
820  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
821  * @priv: staging_rxon is compared to active_rxon
822  *
823  * If the RXON structure is changing enough to require a new tune,
824  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
825  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
826  */
827 int iwl_full_rxon_required(struct iwl_priv *priv)
828 {
829
830         /* These items are only settable from the full RXON command */
831         if (!(iwl_is_associated(priv)) ||
832             compare_ether_addr(priv->staging_rxon.bssid_addr,
833                                priv->active_rxon.bssid_addr) ||
834             compare_ether_addr(priv->staging_rxon.node_addr,
835                                priv->active_rxon.node_addr) ||
836             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
837                                priv->active_rxon.wlap_bssid_addr) ||
838             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
839             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
840             (priv->staging_rxon.air_propagation !=
841              priv->active_rxon.air_propagation) ||
842             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
843              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
844             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
845              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
846             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
847              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
848             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
849                 return 1;
850
851         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
852          * be updated with the RXON_ASSOC command -- however only some
853          * flag transitions are allowed using RXON_ASSOC */
854
855         /* Check if we are not switching bands */
856         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
857             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
858                 return 1;
859
860         /* Check if we are switching association toggle */
861         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
862                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
863                 return 1;
864
865         return 0;
866 }
867 EXPORT_SYMBOL(iwl_full_rxon_required);
868
869 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
870 {
871         int i;
872         int rate_mask;
873
874         /* Set rate mask*/
875         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
876                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
877         else
878                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
879
880         /* Find lowest valid rate */
881         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
882                                         i = iwl_rates[i].next_ieee) {
883                 if (rate_mask & (1 << i))
884                         return iwl_rates[i].plcp;
885         }
886
887         /* No valid rate was found. Assign the lowest one */
888         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
889                 return IWL_RATE_1M_PLCP;
890         else
891                 return IWL_RATE_6M_PLCP;
892 }
893 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
894
895 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
896 {
897         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
898
899         if (!ht_conf->is_ht) {
900                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
901                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
902                         RXON_FLG_HT40_PROT_MSK |
903                         RXON_FLG_HT_PROT_MSK);
904                 return;
905         }
906
907         /* FIXME: if the definition of ht_protection changed, the "translation"
908          * will be needed for rxon->flags
909          */
910         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
911
912         /* Set up channel bandwidth:
913          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
914         /* clear the HT channel mode before set the mode */
915         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
916                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
917         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
918                 /* pure ht40 */
919                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
920                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
921                         /* Note: control channel is opposite of extension channel */
922                         switch (ht_conf->extension_chan_offset) {
923                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
924                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
925                                 break;
926                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
927                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
928                                 break;
929                         }
930                 } else {
931                         /* Note: control channel is opposite of extension channel */
932                         switch (ht_conf->extension_chan_offset) {
933                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
934                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
935                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
936                                 break;
937                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
938                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
939                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
940                                 break;
941                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
942                         default:
943                                 /* channel location only valid if in Mixed mode */
944                                 IWL_ERR(priv, "invalid extension channel offset\n");
945                                 break;
946                         }
947                 }
948         } else {
949                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
950         }
951
952         if (priv->cfg->ops->hcmd->set_rxon_chain)
953                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
954
955         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
956                         "extension channel offset 0x%x\n",
957                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
958                         ht_conf->extension_chan_offset);
959         return;
960 }
961 EXPORT_SYMBOL(iwl_set_rxon_ht);
962
963 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
964 #define IWL_NUM_RX_CHAINS_SINGLE        2
965 #define IWL_NUM_IDLE_CHAINS_DUAL        2
966 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
967
968 /*
969  * Determine how many receiver/antenna chains to use.
970  *
971  * More provides better reception via diversity.  Fewer saves power
972  * at the expense of throughput, but only when not in powersave to
973  * start with.
974  *
975  * MIMO (dual stream) requires at least 2, but works better with 3.
976  * This does not determine *which* chains to use, just how many.
977  */
978 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
979 {
980         /* # of Rx chains to use when expecting MIMO. */
981         if (is_single_rx_stream(priv))
982                 return IWL_NUM_RX_CHAINS_SINGLE;
983         else
984                 return IWL_NUM_RX_CHAINS_MULTIPLE;
985 }
986
987 /*
988  * When we are in power saving, there's no difference between
989  * using multiple chains or just a single chain, but due to the
990  * lack of SM PS we lose a lot of throughput if we use just a
991  * single chain.
992  *
993  * Therefore, use the active count here (which will use multiple
994  * chains unless connected to a legacy AP).
995  */
996 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
997 {
998         return active_cnt;
999 }
1000
1001 /* up to 4 chains */
1002 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1003 {
1004         u8 res;
1005         res = (chain_bitmap & BIT(0)) >> 0;
1006         res += (chain_bitmap & BIT(1)) >> 1;
1007         res += (chain_bitmap & BIT(2)) >> 2;
1008         res += (chain_bitmap & BIT(3)) >> 3;
1009         return res;
1010 }
1011
1012 /**
1013  * iwl_is_monitor_mode - Determine if interface in monitor mode
1014  *
1015  * priv->iw_mode is set in add_interface, but add_interface is
1016  * never called for monitor mode. The only way mac80211 informs us about
1017  * monitor mode is through configuring filters (call to configure_filter).
1018  */
1019 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1020 {
1021         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1022 }
1023 EXPORT_SYMBOL(iwl_is_monitor_mode);
1024
1025 /**
1026  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1027  *
1028  * Selects how many and which Rx receivers/antennas/chains to use.
1029  * This should not be used for scan command ... it puts data in wrong place.
1030  */
1031 void iwl_set_rxon_chain(struct iwl_priv *priv)
1032 {
1033         bool is_single = is_single_rx_stream(priv);
1034         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1035         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1036         u32 active_chains;
1037         u16 rx_chain;
1038
1039         /* Tell uCode which antennas are actually connected.
1040          * Before first association, we assume all antennas are connected.
1041          * Just after first association, iwl_chain_noise_calibration()
1042          *    checks which antennas actually *are* connected. */
1043          if (priv->chain_noise_data.active_chains)
1044                 active_chains = priv->chain_noise_data.active_chains;
1045         else
1046                 active_chains = priv->hw_params.valid_rx_ant;
1047
1048         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1049
1050         /* How many receivers should we use? */
1051         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1052         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1053
1054
1055         /* correct rx chain count according hw settings
1056          * and chain noise calibration
1057          */
1058         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1059         if (valid_rx_cnt < active_rx_cnt)
1060                 active_rx_cnt = valid_rx_cnt;
1061
1062         if (valid_rx_cnt < idle_rx_cnt)
1063                 idle_rx_cnt = valid_rx_cnt;
1064
1065         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1066         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1067
1068         /* copied from 'iwl_bg_request_scan()' */
1069         /* Force use of chains B and C (0x6) for Rx for 4965
1070          * Avoid A (0x1) because of its off-channel reception on A-band.
1071          * MIMO is not used here, but value is required */
1072         if (iwl_is_monitor_mode(priv) &&
1073             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1074             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1075                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1076                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1077                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1078                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1079         }
1080
1081         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1082
1083         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1084                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1085         else
1086                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1087
1088         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1089                         priv->staging_rxon.rx_chain,
1090                         active_rx_cnt, idle_rx_cnt);
1091
1092         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1093                 active_rx_cnt < idle_rx_cnt);
1094 }
1095 EXPORT_SYMBOL(iwl_set_rxon_chain);
1096
1097 /**
1098  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1099  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1100  * @channel: Any channel valid for the requested phymode
1101
1102  * In addition to setting the staging RXON, priv->phymode is also set.
1103  *
1104  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1105  * in the staging RXON flag structure based on the phymode
1106  */
1107 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1108 {
1109         enum ieee80211_band band = ch->band;
1110         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1111
1112         if (!iwl_get_channel_info(priv, band, channel)) {
1113                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1114                                channel, band);
1115                 return -EINVAL;
1116         }
1117
1118         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1119             (priv->band == band))
1120                 return 0;
1121
1122         priv->staging_rxon.channel = cpu_to_le16(channel);
1123         if (band == IEEE80211_BAND_5GHZ)
1124                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1125         else
1126                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1127
1128         priv->band = band;
1129
1130         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1131
1132         return 0;
1133 }
1134 EXPORT_SYMBOL(iwl_set_rxon_channel);
1135
1136 void iwl_set_flags_for_band(struct iwl_priv *priv,
1137                             enum ieee80211_band band)
1138 {
1139         if (band == IEEE80211_BAND_5GHZ) {
1140                 priv->staging_rxon.flags &=
1141                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1142                       | RXON_FLG_CCK_MSK);
1143                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1144         } else {
1145                 /* Copied from iwl_post_associate() */
1146                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1147                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1148                 else
1149                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1150
1151                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1152                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1153
1154                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1155                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1156                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1157         }
1158 }
1159
1160 /*
1161  * initialize rxon structure with default values from eeprom
1162  */
1163 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1164 {
1165         const struct iwl_channel_info *ch_info;
1166
1167         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1168
1169         switch (mode) {
1170         case NL80211_IFTYPE_AP:
1171                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1172                 break;
1173
1174         case NL80211_IFTYPE_STATION:
1175                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1176                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1177                 break;
1178
1179         case NL80211_IFTYPE_ADHOC:
1180                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1181                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1182                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1183                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1184                 break;
1185
1186         default:
1187                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1188                 break;
1189         }
1190
1191 #if 0
1192         /* TODO:  Figure out when short_preamble would be set and cache from
1193          * that */
1194         if (!hw_to_local(priv->hw)->short_preamble)
1195                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1196         else
1197                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1198 #endif
1199
1200         ch_info = iwl_get_channel_info(priv, priv->band,
1201                                        le16_to_cpu(priv->active_rxon.channel));
1202
1203         if (!ch_info)
1204                 ch_info = &priv->channel_info[0];
1205
1206         /*
1207          * in some case A channels are all non IBSS
1208          * in this case force B/G channel
1209          */
1210         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1211             !(is_channel_ibss(ch_info)))
1212                 ch_info = &priv->channel_info[0];
1213
1214         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1215         priv->band = ch_info->band;
1216
1217         iwl_set_flags_for_band(priv, priv->band);
1218
1219         priv->staging_rxon.ofdm_basic_rates =
1220             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1221         priv->staging_rxon.cck_basic_rates =
1222             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1223
1224         /* clear both MIX and PURE40 mode flag */
1225         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1226                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1227         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1228         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1229         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1230         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1231         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1232 }
1233 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1234
1235 static void iwl_set_rate(struct iwl_priv *priv)
1236 {
1237         const struct ieee80211_supported_band *hw = NULL;
1238         struct ieee80211_rate *rate;
1239         int i;
1240
1241         hw = iwl_get_hw_mode(priv, priv->band);
1242         if (!hw) {
1243                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1244                 return;
1245         }
1246
1247         priv->active_rate = 0;
1248         priv->active_rate_basic = 0;
1249
1250         for (i = 0; i < hw->n_bitrates; i++) {
1251                 rate = &(hw->bitrates[i]);
1252                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1253                         priv->active_rate |= (1 << rate->hw_value);
1254         }
1255
1256         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1257                        priv->active_rate, priv->active_rate_basic);
1258
1259         /*
1260          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1261          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1262          * OFDM
1263          */
1264         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1265                 priv->staging_rxon.cck_basic_rates =
1266                     ((priv->active_rate_basic &
1267                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1268         else
1269                 priv->staging_rxon.cck_basic_rates =
1270                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1271
1272         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1273                 priv->staging_rxon.ofdm_basic_rates =
1274                     ((priv->active_rate_basic &
1275                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1276                       IWL_FIRST_OFDM_RATE) & 0xFF;
1277         else
1278                 priv->staging_rxon.ofdm_basic_rates =
1279                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1280 }
1281
1282 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1283 {
1284         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1285         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1286         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1287         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1288                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1289         rxon->channel = csa->channel;
1290         priv->staging_rxon.channel = csa->channel;
1291 }
1292 EXPORT_SYMBOL(iwl_rx_csa);
1293
1294 #ifdef CONFIG_IWLWIFI_DEBUG
1295 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1296 {
1297         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1298
1299         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1300         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1301         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1302         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1303         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1304                         le32_to_cpu(rxon->filter_flags));
1305         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1306         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1307                         rxon->ofdm_basic_rates);
1308         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1309         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1310         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1311         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1312 }
1313 #endif
1314 /**
1315  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1316  */
1317 void iwl_irq_handle_error(struct iwl_priv *priv)
1318 {
1319         /* Set the FW error flag -- cleared on iwl_down */
1320         set_bit(STATUS_FW_ERROR, &priv->status);
1321
1322         /* Cancel currently queued command. */
1323         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1324
1325 #ifdef CONFIG_IWLWIFI_DEBUG
1326         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1327                 priv->cfg->ops->lib->dump_nic_error_log(priv);
1328                 priv->cfg->ops->lib->dump_nic_event_log(priv);
1329                 iwl_print_rx_config_cmd(priv);
1330         }
1331 #endif
1332
1333         wake_up_interruptible(&priv->wait_command_queue);
1334
1335         /* Keep the restart process from trying to send host
1336          * commands by clearing the INIT status bit */
1337         clear_bit(STATUS_READY, &priv->status);
1338
1339         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1340                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1341                           "Restarting adapter due to uCode error.\n");
1342
1343                 if (priv->cfg->mod_params->restart_fw)
1344                         queue_work(priv->workqueue, &priv->restart);
1345         }
1346 }
1347 EXPORT_SYMBOL(iwl_irq_handle_error);
1348
1349 int iwl_apm_stop_master(struct iwl_priv *priv)
1350 {
1351         unsigned long flags;
1352
1353         spin_lock_irqsave(&priv->lock, flags);
1354
1355         /* set stop master bit */
1356         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1357
1358         iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1359                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1360
1361         spin_unlock_irqrestore(&priv->lock, flags);
1362         IWL_DEBUG_INFO(priv, "stop master\n");
1363
1364         return 0;
1365 }
1366 EXPORT_SYMBOL(iwl_apm_stop_master);
1367
1368 void iwl_apm_stop(struct iwl_priv *priv)
1369 {
1370         unsigned long flags;
1371
1372         iwl_apm_stop_master(priv);
1373
1374         spin_lock_irqsave(&priv->lock, flags);
1375
1376         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1377
1378         udelay(10);
1379         /* clear "init complete"  move adapter D0A* --> D0U state */
1380         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1381         spin_unlock_irqrestore(&priv->lock, flags);
1382 }
1383 EXPORT_SYMBOL(iwl_apm_stop);
1384
1385 void iwl_configure_filter(struct ieee80211_hw *hw,
1386                           unsigned int changed_flags,
1387                           unsigned int *total_flags,
1388                           u64 multicast)
1389 {
1390         struct iwl_priv *priv = hw->priv;
1391         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1392
1393         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1394                         changed_flags, *total_flags);
1395
1396         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1397                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1398                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1399                 else
1400                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1401         }
1402         if (changed_flags & FIF_ALLMULTI) {
1403                 if (*total_flags & FIF_ALLMULTI)
1404                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1405                 else
1406                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1407         }
1408         if (changed_flags & FIF_CONTROL) {
1409                 if (*total_flags & FIF_CONTROL)
1410                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1411                 else
1412                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1413         }
1414         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1415                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1416                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1417                 else
1418                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1419         }
1420
1421         /* We avoid iwl_commit_rxon here to commit the new filter flags
1422          * since mac80211 will call ieee80211_hw_config immediately.
1423          * (mc_list is not supported at this time). Otherwise, we need to
1424          * queue a background iwl_commit_rxon work.
1425          */
1426
1427         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1428                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1429 }
1430 EXPORT_SYMBOL(iwl_configure_filter);
1431
1432 int iwl_setup_mac(struct iwl_priv *priv)
1433 {
1434         int ret;
1435         struct ieee80211_hw *hw = priv->hw;
1436         hw->rate_control_algorithm = "iwl-agn-rs";
1437
1438         /* Tell mac80211 our characteristics */
1439         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1440                     IEEE80211_HW_NOISE_DBM |
1441                     IEEE80211_HW_AMPDU_AGGREGATION |
1442                     IEEE80211_HW_SPECTRUM_MGMT;
1443
1444         if (!priv->cfg->broken_powersave)
1445                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
1446                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
1447
1448         hw->wiphy->interface_modes =
1449                 BIT(NL80211_IFTYPE_STATION) |
1450                 BIT(NL80211_IFTYPE_ADHOC);
1451
1452         hw->wiphy->custom_regulatory = true;
1453
1454         /* Firmware does not support this */
1455         hw->wiphy->disable_beacon_hints = true;
1456
1457         /*
1458          * For now, disable PS by default because it affects
1459          * RX performance significantly.
1460          */
1461         hw->wiphy->ps_default = false;
1462
1463         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1464         /* we create the 802.11 header and a zero-length SSID element */
1465         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1466
1467         /* Default value; 4 EDCA QOS priorities */
1468         hw->queues = 4;
1469
1470         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1471
1472         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1473                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1474                         &priv->bands[IEEE80211_BAND_2GHZ];
1475         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1476                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1477                         &priv->bands[IEEE80211_BAND_5GHZ];
1478
1479         ret = ieee80211_register_hw(priv->hw);
1480         if (ret) {
1481                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1482                 return ret;
1483         }
1484         priv->mac80211_registered = 1;
1485
1486         return 0;
1487 }
1488 EXPORT_SYMBOL(iwl_setup_mac);
1489
1490 int iwl_set_hw_params(struct iwl_priv *priv)
1491 {
1492         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1493         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1494         if (priv->cfg->mod_params->amsdu_size_8K)
1495                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1496         else
1497                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1498         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1499
1500         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1501
1502         if (priv->cfg->mod_params->disable_11n)
1503                 priv->cfg->sku &= ~IWL_SKU_N;
1504
1505         /* Device-specific setup */
1506         return priv->cfg->ops->lib->set_hw_params(priv);
1507 }
1508 EXPORT_SYMBOL(iwl_set_hw_params);
1509
1510 int iwl_init_drv(struct iwl_priv *priv)
1511 {
1512         int ret;
1513
1514         priv->ibss_beacon = NULL;
1515
1516         spin_lock_init(&priv->lock);
1517         spin_lock_init(&priv->sta_lock);
1518         spin_lock_init(&priv->hcmd_lock);
1519
1520         INIT_LIST_HEAD(&priv->free_frames);
1521
1522         mutex_init(&priv->mutex);
1523
1524         /* Clear the driver's (not device's) station table */
1525         iwl_clear_stations_table(priv);
1526
1527         priv->ieee_channels = NULL;
1528         priv->ieee_rates = NULL;
1529         priv->band = IEEE80211_BAND_2GHZ;
1530
1531         priv->iw_mode = NL80211_IFTYPE_STATION;
1532
1533         /* Choose which receivers/antennas to use */
1534         if (priv->cfg->ops->hcmd->set_rxon_chain)
1535                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1536
1537         iwl_init_scan_params(priv);
1538
1539         iwl_reset_qos(priv);
1540
1541         priv->qos_data.qos_active = 0;
1542         priv->qos_data.qos_cap.val = 0;
1543
1544         priv->rates_mask = IWL_RATES_MASK;
1545         /* Set the tx_power_user_lmt to the lowest power level
1546          * this value will get overwritten by channel max power avg
1547          * from eeprom */
1548         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
1549
1550         ret = iwl_init_channel_map(priv);
1551         if (ret) {
1552                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1553                 goto err;
1554         }
1555
1556         ret = iwlcore_init_geos(priv);
1557         if (ret) {
1558                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1559                 goto err_free_channel_map;
1560         }
1561         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1562
1563         return 0;
1564
1565 err_free_channel_map:
1566         iwl_free_channel_map(priv);
1567 err:
1568         return ret;
1569 }
1570 EXPORT_SYMBOL(iwl_init_drv);
1571
1572 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1573 {
1574         int ret = 0;
1575         s8 prev_tx_power = priv->tx_power_user_lmt;
1576
1577         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1578                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1579                          tx_power,
1580                          IWL_TX_POWER_TARGET_POWER_MIN);
1581                 return -EINVAL;
1582         }
1583
1584         if (tx_power > priv->tx_power_device_lmt) {
1585                 IWL_WARN(priv,
1586                         "Requested user TXPOWER %d above upper limit %d.\n",
1587                          tx_power, priv->tx_power_device_lmt);
1588                 return -EINVAL;
1589         }
1590
1591         if (priv->tx_power_user_lmt != tx_power)
1592                 force = true;
1593
1594         /* if nic is not up don't send command */
1595         if (iwl_is_ready_rf(priv)) {
1596                 priv->tx_power_user_lmt = tx_power;
1597                 if (force && priv->cfg->ops->lib->send_tx_power)
1598                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1599                 else if (!priv->cfg->ops->lib->send_tx_power)
1600                         ret = -EOPNOTSUPP;
1601                 /*
1602                  * if fail to set tx_power, restore the orig. tx power
1603                  */
1604                 if (ret)
1605                         priv->tx_power_user_lmt = prev_tx_power;
1606         }
1607
1608         /*
1609          * Even this is an async host command, the command
1610          * will always report success from uCode
1611          * So once driver can placing the command into the queue
1612          * successfully, driver can use priv->tx_power_user_lmt
1613          * to reflect the current tx power
1614          */
1615         return ret;
1616 }
1617 EXPORT_SYMBOL(iwl_set_tx_power);
1618
1619 void iwl_uninit_drv(struct iwl_priv *priv)
1620 {
1621         iwl_calib_free_results(priv);
1622         iwlcore_free_geos(priv);
1623         iwl_free_channel_map(priv);
1624         kfree(priv->scan);
1625 }
1626 EXPORT_SYMBOL(iwl_uninit_drv);
1627
1628 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1629
1630 /* Free dram table */
1631 void iwl_free_isr_ict(struct iwl_priv *priv)
1632 {
1633         if (priv->ict_tbl_vir) {
1634                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1635                                         PAGE_SIZE, priv->ict_tbl_vir,
1636                                         priv->ict_tbl_dma);
1637                 priv->ict_tbl_vir = NULL;
1638         }
1639 }
1640 EXPORT_SYMBOL(iwl_free_isr_ict);
1641
1642
1643 /* allocate dram shared table it is a PAGE_SIZE aligned
1644  * also reset all data related to ICT table interrupt.
1645  */
1646 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1647 {
1648
1649         if (priv->cfg->use_isr_legacy)
1650                 return 0;
1651         /* allocate shrared data table */
1652         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1653                                                   ICT_COUNT) + PAGE_SIZE,
1654                                                   &priv->ict_tbl_dma);
1655         if (!priv->ict_tbl_vir)
1656                 return -ENOMEM;
1657
1658         /* align table to PAGE_SIZE boundry */
1659         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1660
1661         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1662                              (unsigned long long)priv->ict_tbl_dma,
1663                              (unsigned long long)priv->aligned_ict_tbl_dma,
1664                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1665
1666         priv->ict_tbl =  priv->ict_tbl_vir +
1667                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1668
1669         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1670                              priv->ict_tbl, priv->ict_tbl_vir,
1671                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1672
1673         /* reset table and index to all 0 */
1674         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1675         priv->ict_index = 0;
1676
1677         /* add periodic RX interrupt */
1678         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1679         return 0;
1680 }
1681 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1682
1683 /* Device is going up inform it about using ICT interrupt table,
1684  * also we need to tell the driver to start using ICT interrupt.
1685  */
1686 int iwl_reset_ict(struct iwl_priv *priv)
1687 {
1688         u32 val;
1689         unsigned long flags;
1690
1691         if (!priv->ict_tbl_vir)
1692                 return 0;
1693
1694         spin_lock_irqsave(&priv->lock, flags);
1695         iwl_disable_interrupts(priv);
1696
1697         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1698
1699         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1700
1701         val |= CSR_DRAM_INT_TBL_ENABLE;
1702         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1703
1704         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1705                         "aligned dma address %Lx\n",
1706                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1707
1708         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1709         priv->use_ict = true;
1710         priv->ict_index = 0;
1711         iwl_write32(priv, CSR_INT, priv->inta_mask);
1712         iwl_enable_interrupts(priv);
1713         spin_unlock_irqrestore(&priv->lock, flags);
1714
1715         return 0;
1716 }
1717 EXPORT_SYMBOL(iwl_reset_ict);
1718
1719 /* Device is going down disable ict interrupt usage */
1720 void iwl_disable_ict(struct iwl_priv *priv)
1721 {
1722         unsigned long flags;
1723
1724         spin_lock_irqsave(&priv->lock, flags);
1725         priv->use_ict = false;
1726         spin_unlock_irqrestore(&priv->lock, flags);
1727 }
1728 EXPORT_SYMBOL(iwl_disable_ict);
1729
1730 /* interrupt handler using ict table, with this interrupt driver will
1731  * stop using INTA register to get device's interrupt, reading this register
1732  * is expensive, device will write interrupts in ICT dram table, increment
1733  * index then will fire interrupt to driver, driver will OR all ICT table
1734  * entries from current index up to table entry with 0 value. the result is
1735  * the interrupt we need to service, driver will set the entries back to 0 and
1736  * set index.
1737  */
1738 irqreturn_t iwl_isr_ict(int irq, void *data)
1739 {
1740         struct iwl_priv *priv = data;
1741         u32 inta, inta_mask;
1742         u32 val = 0;
1743
1744         if (!priv)
1745                 return IRQ_NONE;
1746
1747         /* dram interrupt table not set yet,
1748          * use legacy interrupt.
1749          */
1750         if (!priv->use_ict)
1751                 return iwl_isr(irq, data);
1752
1753         spin_lock(&priv->lock);
1754
1755         /* Disable (but don't clear!) interrupts here to avoid
1756          * back-to-back ISRs and sporadic interrupts from our NIC.
1757          * If we have something to service, the tasklet will re-enable ints.
1758          * If we *don't* have something, we'll re-enable before leaving here.
1759          */
1760         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1761         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1762
1763
1764         /* Ignore interrupt if there's nothing in NIC to service.
1765          * This may be due to IRQ shared with another device,
1766          * or due to sporadic interrupts thrown from our NIC. */
1767         if (!priv->ict_tbl[priv->ict_index]) {
1768                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1769                 goto none;
1770         }
1771
1772         /* read all entries that not 0 start with ict_index */
1773         while (priv->ict_tbl[priv->ict_index]) {
1774
1775                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1776                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1777                                 priv->ict_index,
1778                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1779                 priv->ict_tbl[priv->ict_index] = 0;
1780                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1781                                                      ICT_COUNT);
1782
1783         }
1784
1785         /* We should not get this value, just ignore it. */
1786         if (val == 0xffffffff)
1787                 val = 0;
1788
1789         inta = (0xff & val) | ((0xff00 & val) << 16);
1790         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1791                         inta, inta_mask, val);
1792
1793         inta &= priv->inta_mask;
1794         priv->inta |= inta;
1795
1796         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1797         if (likely(inta))
1798                 tasklet_schedule(&priv->irq_tasklet);
1799         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1800                 /* Allow interrupt if was disabled by this handler and
1801                  * no tasklet was schedules, We should not enable interrupt,
1802                  * tasklet will enable it.
1803                  */
1804                 iwl_enable_interrupts(priv);
1805         }
1806
1807         spin_unlock(&priv->lock);
1808         return IRQ_HANDLED;
1809
1810  none:
1811         /* re-enable interrupts here since we don't have anything to service.
1812          * only Re-enable if disabled by irq.
1813          */
1814         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1815                 iwl_enable_interrupts(priv);
1816
1817         spin_unlock(&priv->lock);
1818         return IRQ_NONE;
1819 }
1820 EXPORT_SYMBOL(iwl_isr_ict);
1821
1822
1823 static irqreturn_t iwl_isr(int irq, void *data)
1824 {
1825         struct iwl_priv *priv = data;
1826         u32 inta, inta_mask;
1827 #ifdef CONFIG_IWLWIFI_DEBUG
1828         u32 inta_fh;
1829 #endif
1830         if (!priv)
1831                 return IRQ_NONE;
1832
1833         spin_lock(&priv->lock);
1834
1835         /* Disable (but don't clear!) interrupts here to avoid
1836          *    back-to-back ISRs and sporadic interrupts from our NIC.
1837          * If we have something to service, the tasklet will re-enable ints.
1838          * If we *don't* have something, we'll re-enable before leaving here. */
1839         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1840         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1841
1842         /* Discover which interrupts are active/pending */
1843         inta = iwl_read32(priv, CSR_INT);
1844
1845         /* Ignore interrupt if there's nothing in NIC to service.
1846          * This may be due to IRQ shared with another device,
1847          * or due to sporadic interrupts thrown from our NIC. */
1848         if (!inta) {
1849                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1850                 goto none;
1851         }
1852
1853         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1854                 /* Hardware disappeared. It might have already raised
1855                  * an interrupt */
1856                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1857                 goto unplugged;
1858         }
1859
1860 #ifdef CONFIG_IWLWIFI_DEBUG
1861         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1862                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1863                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1864                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1865         }
1866 #endif
1867
1868         priv->inta |= inta;
1869         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1870         if (likely(inta))
1871                 tasklet_schedule(&priv->irq_tasklet);
1872         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1873                 iwl_enable_interrupts(priv);
1874
1875  unplugged:
1876         spin_unlock(&priv->lock);
1877         return IRQ_HANDLED;
1878
1879  none:
1880         /* re-enable interrupts here since we don't have anything to service. */
1881         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1882         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1883                 iwl_enable_interrupts(priv);
1884
1885         spin_unlock(&priv->lock);
1886         return IRQ_NONE;
1887 }
1888
1889 irqreturn_t iwl_isr_legacy(int irq, void *data)
1890 {
1891         struct iwl_priv *priv = data;
1892         u32 inta, inta_mask;
1893         u32 inta_fh;
1894         if (!priv)
1895                 return IRQ_NONE;
1896
1897         spin_lock(&priv->lock);
1898
1899         /* Disable (but don't clear!) interrupts here to avoid
1900          *    back-to-back ISRs and sporadic interrupts from our NIC.
1901          * If we have something to service, the tasklet will re-enable ints.
1902          * If we *don't* have something, we'll re-enable before leaving here. */
1903         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1904         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1905
1906         /* Discover which interrupts are active/pending */
1907         inta = iwl_read32(priv, CSR_INT);
1908         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1909
1910         /* Ignore interrupt if there's nothing in NIC to service.
1911          * This may be due to IRQ shared with another device,
1912          * or due to sporadic interrupts thrown from our NIC. */
1913         if (!inta && !inta_fh) {
1914                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1915                 goto none;
1916         }
1917
1918         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1919                 /* Hardware disappeared. It might have already raised
1920                  * an interrupt */
1921                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1922                 goto unplugged;
1923         }
1924
1925         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1926                       inta, inta_mask, inta_fh);
1927
1928         inta &= ~CSR_INT_BIT_SCD;
1929
1930         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1931         if (likely(inta || inta_fh))
1932                 tasklet_schedule(&priv->irq_tasklet);
1933
1934  unplugged:
1935         spin_unlock(&priv->lock);
1936         return IRQ_HANDLED;
1937
1938  none:
1939         /* re-enable interrupts here since we don't have anything to service. */
1940         /* only Re-enable if diabled by irq */
1941         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1942                 iwl_enable_interrupts(priv);
1943         spin_unlock(&priv->lock);
1944         return IRQ_NONE;
1945 }
1946 EXPORT_SYMBOL(iwl_isr_legacy);
1947
1948 int iwl_send_bt_config(struct iwl_priv *priv)
1949 {
1950         struct iwl_bt_cmd bt_cmd = {
1951                 .flags = 3,
1952                 .lead_time = 0xAA,
1953                 .max_kill = 1,
1954                 .kill_ack_mask = 0,
1955                 .kill_cts_mask = 0,
1956         };
1957
1958         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1959                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1960 }
1961 EXPORT_SYMBOL(iwl_send_bt_config);
1962
1963 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1964 {
1965         u32 stat_flags = 0;
1966         struct iwl_host_cmd cmd = {
1967                 .id = REPLY_STATISTICS_CMD,
1968                 .flags = flags,
1969                 .len = sizeof(stat_flags),
1970                 .data = (u8 *) &stat_flags,
1971         };
1972         return iwl_send_cmd(priv, &cmd);
1973 }
1974 EXPORT_SYMBOL(iwl_send_statistics_request);
1975
1976 /**
1977  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1978  *   using sample data 100 bytes apart.  If these sample points are good,
1979  *   it's a pretty good bet that everything between them is good, too.
1980  */
1981 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1982 {
1983         u32 val;
1984         int ret = 0;
1985         u32 errcnt = 0;
1986         u32 i;
1987
1988         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1989
1990         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1991                 /* read data comes through single port, auto-incr addr */
1992                 /* NOTE: Use the debugless read so we don't flood kernel log
1993                  * if IWL_DL_IO is set */
1994                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1995                         i + IWL49_RTC_INST_LOWER_BOUND);
1996                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1997                 if (val != le32_to_cpu(*image)) {
1998                         ret = -EIO;
1999                         errcnt++;
2000                         if (errcnt >= 3)
2001                                 break;
2002                 }
2003         }
2004
2005         return ret;
2006 }
2007
2008 /**
2009  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
2010  *     looking at all data.
2011  */
2012 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
2013                                  u32 len)
2014 {
2015         u32 val;
2016         u32 save_len = len;
2017         int ret = 0;
2018         u32 errcnt;
2019
2020         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2021
2022         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2023                            IWL49_RTC_INST_LOWER_BOUND);
2024
2025         errcnt = 0;
2026         for (; len > 0; len -= sizeof(u32), image++) {
2027                 /* read data comes through single port, auto-incr addr */
2028                 /* NOTE: Use the debugless read so we don't flood kernel log
2029                  * if IWL_DL_IO is set */
2030                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2031                 if (val != le32_to_cpu(*image)) {
2032                         IWL_ERR(priv, "uCode INST section is invalid at "
2033                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2034                                   save_len - len, val, le32_to_cpu(*image));
2035                         ret = -EIO;
2036                         errcnt++;
2037                         if (errcnt >= 20)
2038                                 break;
2039                 }
2040         }
2041
2042         if (!errcnt)
2043                 IWL_DEBUG_INFO(priv,
2044                     "ucode image in INSTRUCTION memory is good\n");
2045
2046         return ret;
2047 }
2048
2049 /**
2050  * iwl_verify_ucode - determine which instruction image is in SRAM,
2051  *    and verify its contents
2052  */
2053 int iwl_verify_ucode(struct iwl_priv *priv)
2054 {
2055         __le32 *image;
2056         u32 len;
2057         int ret;
2058
2059         /* Try bootstrap */
2060         image = (__le32 *)priv->ucode_boot.v_addr;
2061         len = priv->ucode_boot.len;
2062         ret = iwlcore_verify_inst_sparse(priv, image, len);
2063         if (!ret) {
2064                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2065                 return 0;
2066         }
2067
2068         /* Try initialize */
2069         image = (__le32 *)priv->ucode_init.v_addr;
2070         len = priv->ucode_init.len;
2071         ret = iwlcore_verify_inst_sparse(priv, image, len);
2072         if (!ret) {
2073                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2074                 return 0;
2075         }
2076
2077         /* Try runtime/protocol */
2078         image = (__le32 *)priv->ucode_code.v_addr;
2079         len = priv->ucode_code.len;
2080         ret = iwlcore_verify_inst_sparse(priv, image, len);
2081         if (!ret) {
2082                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2083                 return 0;
2084         }
2085
2086         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2087
2088         /* Since nothing seems to match, show first several data entries in
2089          * instruction SRAM, so maybe visual inspection will give a clue.
2090          * Selection of bootstrap image (vs. other images) is arbitrary. */
2091         image = (__le32 *)priv->ucode_boot.v_addr;
2092         len = priv->ucode_boot.len;
2093         ret = iwl_verify_inst_full(priv, image, len);
2094
2095         return ret;
2096 }
2097 EXPORT_SYMBOL(iwl_verify_ucode);
2098
2099
2100 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2101 {
2102         struct iwl_ct_kill_config cmd;
2103         struct iwl_ct_kill_throttling_config adv_cmd;
2104         unsigned long flags;
2105         int ret = 0;
2106
2107         spin_lock_irqsave(&priv->lock, flags);
2108         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2109                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2110         spin_unlock_irqrestore(&priv->lock, flags);
2111         priv->thermal_throttle.ct_kill_toggle = false;
2112
2113         switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
2114         case CSR_HW_REV_TYPE_1000:
2115         case CSR_HW_REV_TYPE_6x00:
2116         case CSR_HW_REV_TYPE_6x50:
2117                 adv_cmd.critical_temperature_enter =
2118                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2119                 adv_cmd.critical_temperature_exit =
2120                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2121
2122                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2123                                        sizeof(adv_cmd), &adv_cmd);
2124                 if (ret)
2125                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2126                 else
2127                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2128                                         "succeeded, "
2129                                         "critical temperature enter is %d,"
2130                                         "exit is %d\n",
2131                                        priv->hw_params.ct_kill_threshold,
2132                                        priv->hw_params.ct_kill_exit_threshold);
2133                 break;
2134         default:
2135                 cmd.critical_temperature_R =
2136                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2137
2138                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2139                                        sizeof(cmd), &cmd);
2140                 if (ret)
2141                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2142                 else
2143                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2144                                         "succeeded, "
2145                                         "critical temperature is %d\n",
2146                                         priv->hw_params.ct_kill_threshold);
2147                 break;
2148         }
2149 }
2150 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2151
2152
2153 /*
2154  * CARD_STATE_CMD
2155  *
2156  * Use: Sets the device's internal card state to enable, disable, or halt
2157  *
2158  * When in the 'enable' state the card operates as normal.
2159  * When in the 'disable' state, the card enters into a low power mode.
2160  * When in the 'halt' state, the card is shut down and must be fully
2161  * restarted to come back on.
2162  */
2163 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2164 {
2165         struct iwl_host_cmd cmd = {
2166                 .id = REPLY_CARD_STATE_CMD,
2167                 .len = sizeof(u32),
2168                 .data = &flags,
2169                 .flags = meta_flag,
2170         };
2171
2172         return iwl_send_cmd(priv, &cmd);
2173 }
2174
2175 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2176                            struct iwl_rx_mem_buffer *rxb)
2177 {
2178 #ifdef CONFIG_IWLWIFI_DEBUG
2179         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2180         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2181         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2182                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2183 #endif
2184 }
2185 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2186
2187 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2188                                       struct iwl_rx_mem_buffer *rxb)
2189 {
2190         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2191         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2192         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2193                         "notification for %s:\n", len,
2194                         get_cmd_string(pkt->hdr.cmd));
2195         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2196 }
2197 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2198
2199 void iwl_rx_reply_error(struct iwl_priv *priv,
2200                         struct iwl_rx_mem_buffer *rxb)
2201 {
2202         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2203
2204         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2205                 "seq 0x%04X ser 0x%08X\n",
2206                 le32_to_cpu(pkt->u.err_resp.error_type),
2207                 get_cmd_string(pkt->u.err_resp.cmd_id),
2208                 pkt->u.err_resp.cmd_id,
2209                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2210                 le32_to_cpu(pkt->u.err_resp.error_info));
2211 }
2212 EXPORT_SYMBOL(iwl_rx_reply_error);
2213
2214 void iwl_clear_isr_stats(struct iwl_priv *priv)
2215 {
2216         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2217 }
2218
2219 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2220                            const struct ieee80211_tx_queue_params *params)
2221 {
2222         struct iwl_priv *priv = hw->priv;
2223         unsigned long flags;
2224         int q;
2225
2226         IWL_DEBUG_MAC80211(priv, "enter\n");
2227
2228         if (!iwl_is_ready_rf(priv)) {
2229                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2230                 return -EIO;
2231         }
2232
2233         if (queue >= AC_NUM) {
2234                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2235                 return 0;
2236         }
2237
2238         q = AC_NUM - 1 - queue;
2239
2240         spin_lock_irqsave(&priv->lock, flags);
2241
2242         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2243         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2244         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2245         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2246                         cpu_to_le16((params->txop * 32));
2247
2248         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2249         priv->qos_data.qos_active = 1;
2250
2251         if (priv->iw_mode == NL80211_IFTYPE_AP)
2252                 iwl_activate_qos(priv, 1);
2253         else if (priv->assoc_id && iwl_is_associated(priv))
2254                 iwl_activate_qos(priv, 0);
2255
2256         spin_unlock_irqrestore(&priv->lock, flags);
2257
2258         IWL_DEBUG_MAC80211(priv, "leave\n");
2259         return 0;
2260 }
2261 EXPORT_SYMBOL(iwl_mac_conf_tx);
2262
2263 static void iwl_ht_conf(struct iwl_priv *priv,
2264                         struct ieee80211_bss_conf *bss_conf)
2265 {
2266         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2267         struct ieee80211_sta *sta;
2268
2269         IWL_DEBUG_MAC80211(priv, "enter: \n");
2270
2271         if (!ht_conf->is_ht)
2272                 return;
2273
2274         ht_conf->ht_protection =
2275                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2276         ht_conf->non_GF_STA_present =
2277                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2278
2279         ht_conf->single_chain_sufficient = false;
2280
2281         switch (priv->iw_mode) {
2282         case NL80211_IFTYPE_STATION:
2283                 rcu_read_lock();
2284                 sta = ieee80211_find_sta(priv->hw, priv->bssid);
2285                 if (sta) {
2286                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2287                         int maxstreams;
2288
2289                         maxstreams = (ht_cap->mcs.tx_params &
2290                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2291                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2292                         maxstreams += 1;
2293
2294                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2295                             (ht_cap->mcs.rx_mask[2] == 0))
2296                                 ht_conf->single_chain_sufficient = true;
2297                         if (maxstreams <= 1)
2298                                 ht_conf->single_chain_sufficient = true;
2299                 } else {
2300                         /*
2301                          * If at all, this can only happen through a race
2302                          * when the AP disconnects us while we're still
2303                          * setting up the connection, in that case mac80211
2304                          * will soon tell us about that.
2305                          */
2306                         ht_conf->single_chain_sufficient = true;
2307                 }
2308                 rcu_read_unlock();
2309                 break;
2310         case NL80211_IFTYPE_ADHOC:
2311                 ht_conf->single_chain_sufficient = true;
2312                 break;
2313         default:
2314                 break;
2315         }
2316
2317         IWL_DEBUG_MAC80211(priv, "leave\n");
2318 }
2319
2320 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2321 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2322                           struct ieee80211_vif *vif,
2323                           struct ieee80211_bss_conf *bss_conf,
2324                           u32 changes)
2325 {
2326         struct iwl_priv *priv = hw->priv;
2327         int ret;
2328
2329         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2330
2331         if (!iwl_is_alive(priv))
2332                 return;
2333
2334         mutex_lock(&priv->mutex);
2335
2336         if (changes & BSS_CHANGED_BEACON &&
2337             priv->iw_mode == NL80211_IFTYPE_AP) {
2338                 dev_kfree_skb(priv->ibss_beacon);
2339                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2340         }
2341
2342         if (changes & BSS_CHANGED_BEACON_INT) {
2343                 priv->beacon_int = bss_conf->beacon_int;
2344                 /* TODO: in AP mode, do something to make this take effect */
2345         }
2346
2347         if (changes & BSS_CHANGED_BSSID) {
2348                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2349
2350                 /*
2351                  * If there is currently a HW scan going on in the
2352                  * background then we need to cancel it else the RXON
2353                  * below/in post_associate will fail.
2354                  */
2355                 if (iwl_scan_cancel_timeout(priv, 100)) {
2356                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2357                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2358                         mutex_unlock(&priv->mutex);
2359                         return;
2360                 }
2361
2362                 /* mac80211 only sets assoc when in STATION mode */
2363                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2364                     bss_conf->assoc) {
2365                         memcpy(priv->staging_rxon.bssid_addr,
2366                                bss_conf->bssid, ETH_ALEN);
2367
2368                         /* currently needed in a few places */
2369                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2370                 } else {
2371                         priv->staging_rxon.filter_flags &=
2372                                 ~RXON_FILTER_ASSOC_MSK;
2373                 }
2374
2375         }
2376
2377         /*
2378          * This needs to be after setting the BSSID in case
2379          * mac80211 decides to do both changes at once because
2380          * it will invoke post_associate.
2381          */
2382         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2383             changes & BSS_CHANGED_BEACON) {
2384                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2385
2386                 if (beacon)
2387                         iwl_mac_beacon_update(hw, beacon);
2388         }
2389
2390         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2391                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2392                                    bss_conf->use_short_preamble);
2393                 if (bss_conf->use_short_preamble)
2394                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2395                 else
2396                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2397         }
2398
2399         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2400                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2401                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2402                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2403                 else
2404                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2405         }
2406
2407         if (changes & BSS_CHANGED_BASIC_RATES) {
2408                 /* XXX use this information
2409                  *
2410                  * To do that, remove code from iwl_set_rate() and put something
2411                  * like this here:
2412                  *
2413                 if (A-band)
2414                         priv->staging_rxon.ofdm_basic_rates =
2415                                 bss_conf->basic_rates;
2416                 else
2417                         priv->staging_rxon.ofdm_basic_rates =
2418                                 bss_conf->basic_rates >> 4;
2419                         priv->staging_rxon.cck_basic_rates =
2420                                 bss_conf->basic_rates & 0xF;
2421                  */
2422         }
2423
2424         if (changes & BSS_CHANGED_HT) {
2425                 iwl_ht_conf(priv, bss_conf);
2426
2427                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2428                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2429         }
2430
2431         if (changes & BSS_CHANGED_ASSOC) {
2432                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2433                 if (bss_conf->assoc) {
2434                         priv->assoc_id = bss_conf->aid;
2435                         priv->beacon_int = bss_conf->beacon_int;
2436                         priv->timestamp = bss_conf->timestamp;
2437                         priv->assoc_capability = bss_conf->assoc_capability;
2438
2439                         iwl_led_associate(priv);
2440
2441                         /*
2442                          * We have just associated, don't start scan too early
2443                          * leave time for EAPOL exchange to complete.
2444                          *
2445                          * XXX: do this in mac80211
2446                          */
2447                         priv->next_scan_jiffies = jiffies +
2448                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2449                         if (!iwl_is_rfkill(priv))
2450                                 priv->cfg->ops->lib->post_associate(priv);
2451                 } else {
2452                         priv->assoc_id = 0;
2453                         iwl_led_disassociate(priv);
2454                 }
2455         }
2456
2457         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2458                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2459                                    changes);
2460                 ret = iwl_send_rxon_assoc(priv);
2461                 if (!ret) {
2462                         /* Sync active_rxon with latest change. */
2463                         memcpy((void *)&priv->active_rxon,
2464                                 &priv->staging_rxon,
2465                                 sizeof(struct iwl_rxon_cmd));
2466                 }
2467         }
2468
2469         mutex_unlock(&priv->mutex);
2470
2471         IWL_DEBUG_MAC80211(priv, "leave\n");
2472 }
2473 EXPORT_SYMBOL(iwl_bss_info_changed);
2474
2475 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2476 {
2477         struct iwl_priv *priv = hw->priv;
2478         unsigned long flags;
2479         __le64 timestamp;
2480
2481         IWL_DEBUG_MAC80211(priv, "enter\n");
2482
2483         if (!iwl_is_ready_rf(priv)) {
2484                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2485                 return -EIO;
2486         }
2487
2488         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2489                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2490                 return -EIO;
2491         }
2492
2493         spin_lock_irqsave(&priv->lock, flags);
2494
2495         if (priv->ibss_beacon)
2496                 dev_kfree_skb(priv->ibss_beacon);
2497
2498         priv->ibss_beacon = skb;
2499
2500         priv->assoc_id = 0;
2501         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2502         priv->timestamp = le64_to_cpu(timestamp);
2503
2504         IWL_DEBUG_MAC80211(priv, "leave\n");
2505         spin_unlock_irqrestore(&priv->lock, flags);
2506
2507         iwl_reset_qos(priv);
2508
2509         priv->cfg->ops->lib->post_associate(priv);
2510
2511
2512         return 0;
2513 }
2514 EXPORT_SYMBOL(iwl_mac_beacon_update);
2515
2516 int iwl_set_mode(struct iwl_priv *priv, int mode)
2517 {
2518         if (mode == NL80211_IFTYPE_ADHOC) {
2519                 const struct iwl_channel_info *ch_info;
2520
2521                 ch_info = iwl_get_channel_info(priv,
2522                         priv->band,
2523                         le16_to_cpu(priv->staging_rxon.channel));
2524
2525                 if (!ch_info || !is_channel_ibss(ch_info)) {
2526                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2527                                   le16_to_cpu(priv->staging_rxon.channel));
2528                         return -EINVAL;
2529                 }
2530         }
2531
2532         iwl_connection_init_rx_config(priv, mode);
2533
2534         if (priv->cfg->ops->hcmd->set_rxon_chain)
2535                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2536
2537         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2538
2539         iwl_clear_stations_table(priv);
2540
2541         /* dont commit rxon if rf-kill is on*/
2542         if (!iwl_is_ready_rf(priv))
2543                 return -EAGAIN;
2544
2545         iwlcore_commit_rxon(priv);
2546
2547         return 0;
2548 }
2549 EXPORT_SYMBOL(iwl_set_mode);
2550
2551 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2552                                  struct ieee80211_if_init_conf *conf)
2553 {
2554         struct iwl_priv *priv = hw->priv;
2555         unsigned long flags;
2556
2557         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2558
2559         if (priv->vif) {
2560                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2561                 return -EOPNOTSUPP;
2562         }
2563
2564         spin_lock_irqsave(&priv->lock, flags);
2565         priv->vif = conf->vif;
2566         priv->iw_mode = conf->type;
2567
2568         spin_unlock_irqrestore(&priv->lock, flags);
2569
2570         mutex_lock(&priv->mutex);
2571
2572         if (conf->mac_addr) {
2573                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2574                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2575         }
2576
2577         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2578                 /* we are not ready, will run again when ready */
2579                 set_bit(STATUS_MODE_PENDING, &priv->status);
2580
2581         mutex_unlock(&priv->mutex);
2582
2583         IWL_DEBUG_MAC80211(priv, "leave\n");
2584         return 0;
2585 }
2586 EXPORT_SYMBOL(iwl_mac_add_interface);
2587
2588 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2589                                      struct ieee80211_if_init_conf *conf)
2590 {
2591         struct iwl_priv *priv = hw->priv;
2592
2593         IWL_DEBUG_MAC80211(priv, "enter\n");
2594
2595         mutex_lock(&priv->mutex);
2596
2597         if (iwl_is_ready_rf(priv)) {
2598                 iwl_scan_cancel_timeout(priv, 100);
2599                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2600                 iwlcore_commit_rxon(priv);
2601         }
2602         if (priv->vif == conf->vif) {
2603                 priv->vif = NULL;
2604                 memset(priv->bssid, 0, ETH_ALEN);
2605         }
2606         mutex_unlock(&priv->mutex);
2607
2608         IWL_DEBUG_MAC80211(priv, "leave\n");
2609
2610 }
2611 EXPORT_SYMBOL(iwl_mac_remove_interface);
2612
2613 /**
2614  * iwl_mac_config - mac80211 config callback
2615  *
2616  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2617  * be set inappropriately and the driver currently sets the hardware up to
2618  * use it whenever needed.
2619  */
2620 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2621 {
2622         struct iwl_priv *priv = hw->priv;
2623         const struct iwl_channel_info *ch_info;
2624         struct ieee80211_conf *conf = &hw->conf;
2625         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2626         unsigned long flags = 0;
2627         int ret = 0;
2628         u16 ch;
2629         int scan_active = 0;
2630
2631         mutex_lock(&priv->mutex);
2632
2633         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2634                                         conf->channel->hw_value, changed);
2635
2636         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2637                         test_bit(STATUS_SCANNING, &priv->status))) {
2638                 scan_active = 1;
2639                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2640         }
2641
2642
2643         /* during scanning mac80211 will delay channel setting until
2644          * scan finish with changed = 0
2645          */
2646         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2647                 if (scan_active)
2648                         goto set_ch_out;
2649
2650                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2651                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2652                 if (!is_channel_valid(ch_info)) {
2653                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2654                         ret = -EINVAL;
2655                         goto set_ch_out;
2656                 }
2657
2658                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2659                         !is_channel_ibss(ch_info)) {
2660                         IWL_ERR(priv, "channel %d in band %d not "
2661                                 "IBSS channel\n",
2662                                 conf->channel->hw_value, conf->channel->band);
2663                         ret = -EINVAL;
2664                         goto set_ch_out;
2665                 }
2666
2667                 spin_lock_irqsave(&priv->lock, flags);
2668
2669                 /* Configure HT40 channels */
2670                 ht_conf->is_ht = conf_is_ht(conf);
2671                 if (ht_conf->is_ht) {
2672                         if (conf_is_ht40_minus(conf)) {
2673                                 ht_conf->extension_chan_offset =
2674                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2675                                 ht_conf->is_40mhz = true;
2676                         } else if (conf_is_ht40_plus(conf)) {
2677                                 ht_conf->extension_chan_offset =
2678                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2679                                 ht_conf->is_40mhz = true;
2680                         } else {
2681                                 ht_conf->extension_chan_offset =
2682                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2683                                 ht_conf->is_40mhz = false;
2684                         }
2685                 } else
2686                         ht_conf->is_40mhz = false;
2687                 /* Default to no protection. Protection mode will later be set
2688                  * from BSS config in iwl_ht_conf */
2689                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2690
2691                 /* if we are switching from ht to 2.4 clear flags
2692                  * from any ht related info since 2.4 does not
2693                  * support ht */
2694                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2695                         priv->staging_rxon.flags = 0;
2696
2697                 iwl_set_rxon_channel(priv, conf->channel);
2698
2699                 iwl_set_flags_for_band(priv, conf->channel->band);
2700                 spin_unlock_irqrestore(&priv->lock, flags);
2701  set_ch_out:
2702                 /* The list of supported rates and rate mask can be different
2703                  * for each band; since the band may have changed, reset
2704                  * the rate mask to what mac80211 lists */
2705                 iwl_set_rate(priv);
2706         }
2707
2708         if (changed & (IEEE80211_CONF_CHANGE_PS |
2709                         IEEE80211_CONF_CHANGE_IDLE)) {
2710                 ret = iwl_power_update_mode(priv, false);
2711                 if (ret)
2712                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2713         }
2714
2715         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2716                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2717                         priv->tx_power_user_lmt, conf->power_level);
2718
2719                 iwl_set_tx_power(priv, conf->power_level, false);
2720         }
2721
2722         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2723         if (priv->cfg->ops->hcmd->set_rxon_chain)
2724                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2725
2726         if (!iwl_is_ready(priv)) {
2727                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2728                 goto out;
2729         }
2730
2731         if (scan_active)
2732                 goto out;
2733
2734         if (memcmp(&priv->active_rxon,
2735                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2736                 iwlcore_commit_rxon(priv);
2737         else
2738                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2739
2740
2741 out:
2742         IWL_DEBUG_MAC80211(priv, "leave\n");
2743         mutex_unlock(&priv->mutex);
2744         return ret;
2745 }
2746 EXPORT_SYMBOL(iwl_mac_config);
2747
2748 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2749                          struct ieee80211_tx_queue_stats *stats)
2750 {
2751         struct iwl_priv *priv = hw->priv;
2752         int i, avail;
2753         struct iwl_tx_queue *txq;
2754         struct iwl_queue *q;
2755         unsigned long flags;
2756
2757         IWL_DEBUG_MAC80211(priv, "enter\n");
2758
2759         if (!iwl_is_ready_rf(priv)) {
2760                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2761                 return -EIO;
2762         }
2763
2764         spin_lock_irqsave(&priv->lock, flags);
2765
2766         for (i = 0; i < AC_NUM; i++) {
2767                 txq = &priv->txq[i];
2768                 q = &txq->q;
2769                 avail = iwl_queue_space(q);
2770
2771                 stats[i].len = q->n_window - avail;
2772                 stats[i].limit = q->n_window - q->high_mark;
2773                 stats[i].count = q->n_window;
2774
2775         }
2776         spin_unlock_irqrestore(&priv->lock, flags);
2777
2778         IWL_DEBUG_MAC80211(priv, "leave\n");
2779
2780         return 0;
2781 }
2782 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2783
2784 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2785 {
2786         struct iwl_priv *priv = hw->priv;
2787         unsigned long flags;
2788
2789         mutex_lock(&priv->mutex);
2790         IWL_DEBUG_MAC80211(priv, "enter\n");
2791
2792         spin_lock_irqsave(&priv->lock, flags);
2793         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2794         spin_unlock_irqrestore(&priv->lock, flags);
2795
2796         iwl_reset_qos(priv);
2797
2798         spin_lock_irqsave(&priv->lock, flags);
2799         priv->assoc_id = 0;
2800         priv->assoc_capability = 0;
2801         priv->assoc_station_added = 0;
2802
2803         /* new association get rid of ibss beacon skb */
2804         if (priv->ibss_beacon)
2805                 dev_kfree_skb(priv->ibss_beacon);
2806
2807         priv->ibss_beacon = NULL;
2808
2809         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2810         priv->timestamp = 0;
2811         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2812                 priv->beacon_int = 0;
2813
2814         spin_unlock_irqrestore(&priv->lock, flags);
2815
2816         if (!iwl_is_ready_rf(priv)) {
2817                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2818                 mutex_unlock(&priv->mutex);
2819                 return;
2820         }
2821
2822         /* we are restarting association process
2823          * clear RXON_FILTER_ASSOC_MSK bit
2824          */
2825         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2826                 iwl_scan_cancel_timeout(priv, 100);
2827                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2828                 iwlcore_commit_rxon(priv);
2829         }
2830
2831         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2832                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2833                 mutex_unlock(&priv->mutex);
2834                 return;
2835         }
2836
2837         iwl_set_rate(priv);
2838
2839         mutex_unlock(&priv->mutex);
2840
2841         IWL_DEBUG_MAC80211(priv, "leave\n");
2842 }
2843 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2844
2845 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2846 {
2847         if (!priv->txq)
2848                 priv->txq = kzalloc(
2849                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2850                         GFP_KERNEL);
2851         if (!priv->txq) {
2852                 IWL_ERR(priv, "Not enough memory for txq \n");
2853                 return -ENOMEM;
2854         }
2855         return 0;
2856 }
2857 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2858
2859 void iwl_free_txq_mem(struct iwl_priv *priv)
2860 {
2861         kfree(priv->txq);
2862         priv->txq = NULL;
2863 }
2864 EXPORT_SYMBOL(iwl_free_txq_mem);
2865
2866 #ifdef CONFIG_IWLWIFI_DEBUGFS
2867
2868 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2869
2870 void iwl_reset_traffic_log(struct iwl_priv *priv)
2871 {
2872         priv->tx_traffic_idx = 0;
2873         priv->rx_traffic_idx = 0;
2874         if (priv->tx_traffic)
2875                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2876         if (priv->rx_traffic)
2877                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2878 }
2879
2880 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2881 {
2882         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2883
2884         if (iwl_debug_level & IWL_DL_TX) {
2885                 if (!priv->tx_traffic) {
2886                         priv->tx_traffic =
2887                                 kzalloc(traffic_size, GFP_KERNEL);
2888                         if (!priv->tx_traffic)
2889                                 return -ENOMEM;
2890                 }
2891         }
2892         if (iwl_debug_level & IWL_DL_RX) {
2893                 if (!priv->rx_traffic) {
2894                         priv->rx_traffic =
2895                                 kzalloc(traffic_size, GFP_KERNEL);
2896                         if (!priv->rx_traffic)
2897                                 return -ENOMEM;
2898                 }
2899         }
2900         iwl_reset_traffic_log(priv);
2901         return 0;
2902 }
2903 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2904
2905 void iwl_free_traffic_mem(struct iwl_priv *priv)
2906 {
2907         kfree(priv->tx_traffic);
2908         priv->tx_traffic = NULL;
2909
2910         kfree(priv->rx_traffic);
2911         priv->rx_traffic = NULL;
2912 }
2913 EXPORT_SYMBOL(iwl_free_traffic_mem);
2914
2915 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2916                       u16 length, struct ieee80211_hdr *header)
2917 {
2918         __le16 fc;
2919         u16 len;
2920
2921         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2922                 return;
2923
2924         if (!priv->tx_traffic)
2925                 return;
2926
2927         fc = header->frame_control;
2928         if (ieee80211_is_data(fc)) {
2929                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2930                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2931                 memcpy((priv->tx_traffic +
2932                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2933                        header, len);
2934                 priv->tx_traffic_idx =
2935                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2936         }
2937 }
2938 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2939
2940 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2941                       u16 length, struct ieee80211_hdr *header)
2942 {
2943         __le16 fc;
2944         u16 len;
2945
2946         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2947                 return;
2948
2949         if (!priv->rx_traffic)
2950                 return;
2951
2952         fc = header->frame_control;
2953         if (ieee80211_is_data(fc)) {
2954                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2955                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2956                 memcpy((priv->rx_traffic +
2957                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2958                        header, len);
2959                 priv->rx_traffic_idx =
2960                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2961         }
2962 }
2963 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2964
2965 const char *get_mgmt_string(int cmd)
2966 {
2967         switch (cmd) {
2968                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2969                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2970                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2971                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2972                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2973                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2974                 IWL_CMD(MANAGEMENT_BEACON);
2975                 IWL_CMD(MANAGEMENT_ATIM);
2976                 IWL_CMD(MANAGEMENT_DISASSOC);
2977                 IWL_CMD(MANAGEMENT_AUTH);
2978                 IWL_CMD(MANAGEMENT_DEAUTH);
2979                 IWL_CMD(MANAGEMENT_ACTION);
2980         default:
2981                 return "UNKNOWN";
2982
2983         }
2984 }
2985
2986 const char *get_ctrl_string(int cmd)
2987 {
2988         switch (cmd) {
2989                 IWL_CMD(CONTROL_BACK_REQ);
2990                 IWL_CMD(CONTROL_BACK);
2991                 IWL_CMD(CONTROL_PSPOLL);
2992                 IWL_CMD(CONTROL_RTS);
2993                 IWL_CMD(CONTROL_CTS);
2994                 IWL_CMD(CONTROL_ACK);
2995                 IWL_CMD(CONTROL_CFEND);
2996                 IWL_CMD(CONTROL_CFENDACK);
2997         default:
2998                 return "UNKNOWN";
2999
3000         }
3001 }
3002
3003 void iwl_clear_tx_stats(struct iwl_priv *priv)
3004 {
3005         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
3006
3007 }
3008
3009 void iwl_clear_rx_stats(struct iwl_priv *priv)
3010 {
3011         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
3012 }
3013
3014 /*
3015  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
3016  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
3017  * Use debugFs to display the rx/rx_statistics
3018  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
3019  * information will be recorded, but DATA pkt still will be recorded
3020  * for the reason of iwl_led.c need to control the led blinking based on
3021  * number of tx and rx data.
3022  *
3023  */
3024 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
3025 {
3026         struct traffic_stats    *stats;
3027
3028         if (is_tx)
3029                 stats = &priv->tx_stats;
3030         else
3031                 stats = &priv->rx_stats;
3032
3033         if (ieee80211_is_mgmt(fc)) {
3034                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3035                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
3036                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
3037                         break;
3038                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3039                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
3040                         break;
3041                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
3042                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
3043                         break;
3044                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
3045                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
3046                         break;
3047                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
3048                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
3049                         break;
3050                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3051                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
3052                         break;
3053                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3054                         stats->mgmt[MANAGEMENT_BEACON]++;
3055                         break;
3056                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
3057                         stats->mgmt[MANAGEMENT_ATIM]++;
3058                         break;
3059                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
3060                         stats->mgmt[MANAGEMENT_DISASSOC]++;
3061                         break;
3062                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
3063                         stats->mgmt[MANAGEMENT_AUTH]++;
3064                         break;
3065                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3066                         stats->mgmt[MANAGEMENT_DEAUTH]++;
3067                         break;
3068                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
3069                         stats->mgmt[MANAGEMENT_ACTION]++;
3070                         break;
3071                 }
3072         } else if (ieee80211_is_ctl(fc)) {
3073                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3074                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3075                         stats->ctrl[CONTROL_BACK_REQ]++;
3076                         break;
3077                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3078                         stats->ctrl[CONTROL_BACK]++;
3079                         break;
3080                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3081                         stats->ctrl[CONTROL_PSPOLL]++;
3082                         break;
3083                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3084                         stats->ctrl[CONTROL_RTS]++;
3085                         break;
3086                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3087                         stats->ctrl[CONTROL_CTS]++;
3088                         break;
3089                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3090                         stats->ctrl[CONTROL_ACK]++;
3091                         break;
3092                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3093                         stats->ctrl[CONTROL_CFEND]++;
3094                         break;
3095                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3096                         stats->ctrl[CONTROL_CFENDACK]++;
3097                         break;
3098                 }
3099         } else {
3100                 /* data */
3101                 stats->data_cnt++;
3102                 stats->data_bytes += len;
3103         }
3104 }
3105 EXPORT_SYMBOL(iwl_update_stats);
3106 #endif
3107
3108 #ifdef CONFIG_PM
3109
3110 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3111 {
3112         struct iwl_priv *priv = pci_get_drvdata(pdev);
3113
3114         /*
3115          * This function is called when system goes into suspend state
3116          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3117          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3118          * it will not call apm_ops.stop() to stop the DMA operation.
3119          * Calling apm_ops.stop here to make sure we stop the DMA.
3120          */
3121         priv->cfg->ops->lib->apm_ops.stop(priv);
3122
3123         pci_save_state(pdev);
3124         pci_disable_device(pdev);
3125         pci_set_power_state(pdev, PCI_D3hot);
3126
3127         return 0;
3128 }
3129 EXPORT_SYMBOL(iwl_pci_suspend);
3130
3131 int iwl_pci_resume(struct pci_dev *pdev)
3132 {
3133         struct iwl_priv *priv = pci_get_drvdata(pdev);
3134         int ret;
3135
3136         pci_set_power_state(pdev, PCI_D0);
3137         ret = pci_enable_device(pdev);
3138         if (ret)
3139                 return ret;
3140         pci_restore_state(pdev);
3141         iwl_enable_interrupts(priv);
3142
3143         return 0;
3144 }
3145 EXPORT_SYMBOL(iwl_pci_resume);
3146
3147 #endif /* CONFIG_PM */