7c0ef8e4ebbf25632a2eb17a57c33747e6c41b17
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2  *
3  * GPL LICENSE SUMMARY
4  *
5  * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of version 2 of the GNU General Public License as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19  * USA
20  *
21  * The full GNU General Public License is included in this distribution
22  * in the file called LICENSE.GPL.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <net/mac80211.h>
33
34 #include "iwl-eeprom.h"
35 #include "iwl-dev.h" /* FIXME: remove */
36 #include "iwl-debug.h"
37 #include "iwl-core.h"
38 #include "iwl-io.h"
39 #include "iwl-power.h"
40 #include "iwl-sta.h"
41 #include "iwl-helpers.h"
42
43
44 MODULE_DESCRIPTION("iwl core");
45 MODULE_VERSION(IWLWIFI_VERSION);
46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
47 MODULE_LICENSE("GPL");
48
49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
51                                     IWL_RATE_SISO_##s##M_PLCP, \
52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
54                                     IWL_RATE_##r##M_IEEE,      \
55                                     IWL_RATE_##ip##M_INDEX,    \
56                                     IWL_RATE_##in##M_INDEX,    \
57                                     IWL_RATE_##rp##M_INDEX,    \
58                                     IWL_RATE_##rn##M_INDEX,    \
59                                     IWL_RATE_##pp##M_INDEX,    \
60                                     IWL_RATE_##np##M_INDEX }
61
62 u32 iwl_debug_level;
63 EXPORT_SYMBOL(iwl_debug_level);
64
65 static irqreturn_t iwl_isr(int irq, void *data);
66
67 /*
68  * Parameter order:
69  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
70  *
71  * If there isn't a valid next or previous rate then INV is used which
72  * maps to IWL_RATE_INVALID
73  *
74  */
75 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
76         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
77         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
78         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
79         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
80         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
81         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
82         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
83         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
84         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
85         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
86         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
87         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
88         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
89         /* FIXME:RS:          ^^    should be INV (legacy) */
90 };
91 EXPORT_SYMBOL(iwl_rates);
92
93 /**
94  * translate ucode response to mac80211 tx status control values
95  */
96 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
97                                   struct ieee80211_tx_info *info)
98 {
99         struct ieee80211_tx_rate *r = &info->control.rates[0];
100
101         info->antenna_sel_tx =
102                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
103         if (rate_n_flags & RATE_MCS_HT_MSK)
104                 r->flags |= IEEE80211_TX_RC_MCS;
105         if (rate_n_flags & RATE_MCS_GF_MSK)
106                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
107         if (rate_n_flags & RATE_MCS_HT40_MSK)
108                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
109         if (rate_n_flags & RATE_MCS_DUP_MSK)
110                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
111         if (rate_n_flags & RATE_MCS_SGI_MSK)
112                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
113         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
114 }
115 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
116
117 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
118 {
119         int idx = 0;
120
121         /* HT rate format */
122         if (rate_n_flags & RATE_MCS_HT_MSK) {
123                 idx = (rate_n_flags & 0xff);
124
125                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
126                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
127                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
128                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
129
130                 idx += IWL_FIRST_OFDM_RATE;
131                 /* skip 9M not supported in ht*/
132                 if (idx >= IWL_RATE_9M_INDEX)
133                         idx += 1;
134                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
135                         return idx;
136
137         /* legacy rate format, search for match in table */
138         } else {
139                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
140                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
141                                 return idx;
142         }
143
144         return -1;
145 }
146 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
147
148 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
149 {
150         int idx = 0;
151         int band_offset = 0;
152
153         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
154         if (rate_n_flags & RATE_MCS_HT_MSK) {
155                 idx = (rate_n_flags & 0xff);
156                 return idx;
157         /* Legacy rate format, search for match in table */
158         } else {
159                 if (band == IEEE80211_BAND_5GHZ)
160                         band_offset = IWL_FIRST_OFDM_RATE;
161                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
162                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
163                                 return idx - band_offset;
164         }
165
166         return -1;
167 }
168
169 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
170 {
171         int i;
172         u8 ind = ant;
173         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
174                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
175                 if (priv->hw_params.valid_tx_ant & BIT(ind))
176                         return ind;
177         }
178         return ant;
179 }
180
181 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
182 EXPORT_SYMBOL(iwl_bcast_addr);
183
184
185 /* This function both allocates and initializes hw and priv. */
186 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
187                 struct ieee80211_ops *hw_ops)
188 {
189         struct iwl_priv *priv;
190
191         /* mac80211 allocates memory for this device instance, including
192          *   space for this driver's private structure */
193         struct ieee80211_hw *hw =
194                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
195         if (hw == NULL) {
196                 printk(KERN_ERR "%s: Can not allocate network device\n",
197                        cfg->name);
198                 goto out;
199         }
200
201         priv = hw->priv;
202         priv->hw = hw;
203
204 out:
205         return hw;
206 }
207 EXPORT_SYMBOL(iwl_alloc_all);
208
209 void iwl_hw_detect(struct iwl_priv *priv)
210 {
211         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
212         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
213         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
214 }
215 EXPORT_SYMBOL(iwl_hw_detect);
216
217 int iwl_hw_nic_init(struct iwl_priv *priv)
218 {
219         unsigned long flags;
220         struct iwl_rx_queue *rxq = &priv->rxq;
221         int ret;
222
223         /* nic_init */
224         spin_lock_irqsave(&priv->lock, flags);
225         priv->cfg->ops->lib->apm_ops.init(priv);
226         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
227         spin_unlock_irqrestore(&priv->lock, flags);
228
229         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
230
231         priv->cfg->ops->lib->apm_ops.config(priv);
232
233         /* Allocate the RX queue, or reset if it is already allocated */
234         if (!rxq->bd) {
235                 ret = iwl_rx_queue_alloc(priv);
236                 if (ret) {
237                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
238                         return -ENOMEM;
239                 }
240         } else
241                 iwl_rx_queue_reset(priv, rxq);
242
243         iwl_rx_replenish(priv);
244
245         iwl_rx_init(priv, rxq);
246
247         spin_lock_irqsave(&priv->lock, flags);
248
249         rxq->need_update = 1;
250         iwl_rx_queue_update_write_ptr(priv, rxq);
251
252         spin_unlock_irqrestore(&priv->lock, flags);
253
254         /* Allocate and init all Tx and Command queues */
255         ret = iwl_txq_ctx_reset(priv);
256         if (ret)
257                 return ret;
258
259         set_bit(STATUS_INIT, &priv->status);
260
261         return 0;
262 }
263 EXPORT_SYMBOL(iwl_hw_nic_init);
264
265 /*
266  * QoS  support
267 */
268 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
269 {
270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
271                 return;
272
273         priv->qos_data.def_qos_parm.qos_flags = 0;
274
275         if (priv->qos_data.qos_cap.q_AP.queue_request &&
276             !priv->qos_data.qos_cap.q_AP.txop_request)
277                 priv->qos_data.def_qos_parm.qos_flags |=
278                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
279         if (priv->qos_data.qos_active)
280                 priv->qos_data.def_qos_parm.qos_flags |=
281                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
282
283         if (priv->current_ht_config.is_ht)
284                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
285
286         if (force || iwl_is_associated(priv)) {
287                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
288                                 priv->qos_data.qos_active,
289                                 priv->qos_data.def_qos_parm.qos_flags);
290
291                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
292                                        sizeof(struct iwl_qosparam_cmd),
293                                        &priv->qos_data.def_qos_parm, NULL);
294         }
295 }
296 EXPORT_SYMBOL(iwl_activate_qos);
297
298 /*
299  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
300  *                                              (802.11b)      (802.11a/g)
301  * AC_BK      15            1023        7           0               0
302  * AC_BE      15            1023        3           0               0
303  * AC_VI       7              15        2          6.016ms       3.008ms
304  * AC_VO       3               7        2          3.264ms       1.504ms
305  */
306 void iwl_reset_qos(struct iwl_priv *priv)
307 {
308         u16 cw_min = 15;
309         u16 cw_max = 1023;
310         u8 aifs = 2;
311         bool is_legacy = false;
312         unsigned long flags;
313         int i;
314
315         spin_lock_irqsave(&priv->lock, flags);
316         /* QoS always active in AP and ADHOC mode
317          * In STA mode wait for association
318          */
319         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
320             priv->iw_mode == NL80211_IFTYPE_AP)
321                 priv->qos_data.qos_active = 1;
322         else
323                 priv->qos_data.qos_active = 0;
324
325         /* check for legacy mode */
326         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
327             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
328             (priv->iw_mode == NL80211_IFTYPE_STATION &&
329             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
330                 cw_min = 31;
331                 is_legacy = 1;
332         }
333
334         if (priv->qos_data.qos_active)
335                 aifs = 3;
336
337         /* AC_BE */
338         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
339         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
340         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
341         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
342         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
343
344         if (priv->qos_data.qos_active) {
345                 /* AC_BK */
346                 i = 1;
347                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
348                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
349                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
350                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
351                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
352
353                 /* AC_VI */
354                 i = 2;
355                 priv->qos_data.def_qos_parm.ac[i].cw_min =
356                         cpu_to_le16((cw_min + 1) / 2 - 1);
357                 priv->qos_data.def_qos_parm.ac[i].cw_max =
358                         cpu_to_le16(cw_min);
359                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
360                 if (is_legacy)
361                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
362                                 cpu_to_le16(6016);
363                 else
364                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
365                                 cpu_to_le16(3008);
366                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
367
368                 /* AC_VO */
369                 i = 3;
370                 priv->qos_data.def_qos_parm.ac[i].cw_min =
371                         cpu_to_le16((cw_min + 1) / 4 - 1);
372                 priv->qos_data.def_qos_parm.ac[i].cw_max =
373                         cpu_to_le16((cw_min + 1) / 2 - 1);
374                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
375                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
376                 if (is_legacy)
377                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
378                                 cpu_to_le16(3264);
379                 else
380                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
381                                 cpu_to_le16(1504);
382         } else {
383                 for (i = 1; i < 4; i++) {
384                         priv->qos_data.def_qos_parm.ac[i].cw_min =
385                                 cpu_to_le16(cw_min);
386                         priv->qos_data.def_qos_parm.ac[i].cw_max =
387                                 cpu_to_le16(cw_max);
388                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
389                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
390                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
391                 }
392         }
393         IWL_DEBUG_QOS(priv, "set QoS to default \n");
394
395         spin_unlock_irqrestore(&priv->lock, flags);
396 }
397 EXPORT_SYMBOL(iwl_reset_qos);
398
399 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
400 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
401 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
402                               struct ieee80211_sta_ht_cap *ht_info,
403                               enum ieee80211_band band)
404 {
405         u16 max_bit_rate = 0;
406         u8 rx_chains_num = priv->hw_params.rx_chains_num;
407         u8 tx_chains_num = priv->hw_params.tx_chains_num;
408
409         ht_info->cap = 0;
410         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
411
412         ht_info->ht_supported = true;
413
414         if (priv->cfg->ht_greenfield_support)
415                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
416         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
417         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
418                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
419
420         max_bit_rate = MAX_BIT_RATE_20_MHZ;
421         if (priv->hw_params.ht40_channel & BIT(band)) {
422                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
423                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
424                 ht_info->mcs.rx_mask[4] = 0x01;
425                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
426         }
427
428         if (priv->cfg->mod_params->amsdu_size_8K)
429                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
430
431         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
432         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
433
434         ht_info->mcs.rx_mask[0] = 0xFF;
435         if (rx_chains_num >= 2)
436                 ht_info->mcs.rx_mask[1] = 0xFF;
437         if (rx_chains_num >= 3)
438                 ht_info->mcs.rx_mask[2] = 0xFF;
439
440         /* Highest supported Rx data rate */
441         max_bit_rate *= rx_chains_num;
442         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
443         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
444
445         /* Tx MCS capabilities */
446         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
447         if (tx_chains_num != rx_chains_num) {
448                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
449                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
450                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
451         }
452 }
453
454 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
455                               struct ieee80211_rate *rates)
456 {
457         int i;
458
459         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
460                 rates[i].bitrate = iwl_rates[i].ieee * 5;
461                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
462                 rates[i].hw_value_short = i;
463                 rates[i].flags = 0;
464                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
465                         /*
466                          * If CCK != 1M then set short preamble rate flag.
467                          */
468                         rates[i].flags |=
469                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
470                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
471                 }
472         }
473 }
474
475
476 /**
477  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
478  */
479 int iwlcore_init_geos(struct iwl_priv *priv)
480 {
481         struct iwl_channel_info *ch;
482         struct ieee80211_supported_band *sband;
483         struct ieee80211_channel *channels;
484         struct ieee80211_channel *geo_ch;
485         struct ieee80211_rate *rates;
486         int i = 0;
487
488         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
489             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
490                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
491                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
492                 return 0;
493         }
494
495         channels = kzalloc(sizeof(struct ieee80211_channel) *
496                            priv->channel_count, GFP_KERNEL);
497         if (!channels)
498                 return -ENOMEM;
499
500         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
501                         GFP_KERNEL);
502         if (!rates) {
503                 kfree(channels);
504                 return -ENOMEM;
505         }
506
507         /* 5.2GHz channels start after the 2.4GHz channels */
508         sband = &priv->bands[IEEE80211_BAND_5GHZ];
509         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
510         /* just OFDM */
511         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
512         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
513
514         if (priv->cfg->sku & IWL_SKU_N)
515                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
516                                          IEEE80211_BAND_5GHZ);
517
518         sband = &priv->bands[IEEE80211_BAND_2GHZ];
519         sband->channels = channels;
520         /* OFDM & CCK */
521         sband->bitrates = rates;
522         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
523
524         if (priv->cfg->sku & IWL_SKU_N)
525                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
526                                          IEEE80211_BAND_2GHZ);
527
528         priv->ieee_channels = channels;
529         priv->ieee_rates = rates;
530
531         for (i = 0;  i < priv->channel_count; i++) {
532                 ch = &priv->channel_info[i];
533
534                 /* FIXME: might be removed if scan is OK */
535                 if (!is_channel_valid(ch))
536                         continue;
537
538                 if (is_channel_a_band(ch))
539                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
540                 else
541                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
542
543                 geo_ch = &sband->channels[sband->n_channels++];
544
545                 geo_ch->center_freq =
546                                 ieee80211_channel_to_frequency(ch->channel);
547                 geo_ch->max_power = ch->max_power_avg;
548                 geo_ch->max_antenna_gain = 0xff;
549                 geo_ch->hw_value = ch->channel;
550
551                 if (is_channel_valid(ch)) {
552                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
553                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
554
555                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
556                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
557
558                         if (ch->flags & EEPROM_CHANNEL_RADAR)
559                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
560
561                         geo_ch->flags |= ch->ht40_extension_channel;
562
563                         if (ch->max_power_avg > priv->tx_power_device_lmt)
564                                 priv->tx_power_device_lmt = ch->max_power_avg;
565                 } else {
566                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
567                 }
568
569                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
570                                 ch->channel, geo_ch->center_freq,
571                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
572                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
573                                 "restricted" : "valid",
574                                  geo_ch->flags);
575         }
576
577         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
578              priv->cfg->sku & IWL_SKU_A) {
579                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
580                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
581                            priv->pci_dev->device,
582                            priv->pci_dev->subsystem_device);
583                 priv->cfg->sku &= ~IWL_SKU_A;
584         }
585
586         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
587                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
588                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
589
590         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
591
592         return 0;
593 }
594 EXPORT_SYMBOL(iwlcore_init_geos);
595
596 /*
597  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
598  */
599 void iwlcore_free_geos(struct iwl_priv *priv)
600 {
601         kfree(priv->ieee_channels);
602         kfree(priv->ieee_rates);
603         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
604 }
605 EXPORT_SYMBOL(iwlcore_free_geos);
606
607 static bool is_single_rx_stream(struct iwl_priv *priv)
608 {
609         return !priv->current_ht_config.is_ht ||
610                priv->current_ht_config.single_chain_sufficient;
611 }
612
613 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
614                                    enum ieee80211_band band,
615                                    u16 channel, u8 extension_chan_offset)
616 {
617         const struct iwl_channel_info *ch_info;
618
619         ch_info = iwl_get_channel_info(priv, band, channel);
620         if (!is_channel_valid(ch_info))
621                 return 0;
622
623         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
624                 return !(ch_info->ht40_extension_channel &
625                                         IEEE80211_CHAN_NO_HT40PLUS);
626         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
627                 return !(ch_info->ht40_extension_channel &
628                                         IEEE80211_CHAN_NO_HT40MINUS);
629
630         return 0;
631 }
632
633 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
634                          struct ieee80211_sta_ht_cap *sta_ht_inf)
635 {
636         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
637
638         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
639                 return 0;
640
641         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
642          * the bit will not set if it is pure 40MHz case
643          */
644         if (sta_ht_inf) {
645                 if (!sta_ht_inf->ht_supported)
646                         return 0;
647         }
648 #ifdef CONFIG_IWLWIFI_DEBUG
649         if (priv->disable_ht40)
650                 return 0;
651 #endif
652         return iwl_is_channel_extension(priv, priv->band,
653                         le16_to_cpu(priv->staging_rxon.channel),
654                         ht_conf->extension_chan_offset);
655 }
656 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
657
658 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
659 {
660         u16 new_val = 0;
661         u16 beacon_factor = 0;
662
663         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
664         new_val = beacon_val / beacon_factor;
665
666         if (!new_val)
667                 new_val = max_beacon_val;
668
669         return new_val;
670 }
671
672 void iwl_setup_rxon_timing(struct iwl_priv *priv)
673 {
674         u64 tsf;
675         s32 interval_tm, rem;
676         unsigned long flags;
677         struct ieee80211_conf *conf = NULL;
678         u16 beacon_int;
679
680         conf = ieee80211_get_hw_conf(priv->hw);
681
682         spin_lock_irqsave(&priv->lock, flags);
683         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
684         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
685
686         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
687                 beacon_int = priv->beacon_int;
688                 priv->rxon_timing.atim_window = 0;
689         } else {
690                 beacon_int = priv->vif->bss_conf.beacon_int;
691
692                 /* TODO: we need to get atim_window from upper stack
693                  * for now we set to 0 */
694                 priv->rxon_timing.atim_window = 0;
695         }
696
697         beacon_int = iwl_adjust_beacon_interval(beacon_int,
698                                 priv->hw_params.max_beacon_itrvl * 1024);
699         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
700
701         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
702         interval_tm = beacon_int * 1024;
703         rem = do_div(tsf, interval_tm);
704         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
705
706         spin_unlock_irqrestore(&priv->lock, flags);
707         IWL_DEBUG_ASSOC(priv,
708                         "beacon interval %d beacon timer %d beacon tim %d\n",
709                         le16_to_cpu(priv->rxon_timing.beacon_interval),
710                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
711                         le16_to_cpu(priv->rxon_timing.atim_window));
712 }
713 EXPORT_SYMBOL(iwl_setup_rxon_timing);
714
715 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
716 {
717         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
718
719         if (hw_decrypt)
720                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
721         else
722                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
723
724 }
725 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
726
727 /**
728  * iwl_check_rxon_cmd - validate RXON structure is valid
729  *
730  * NOTE:  This is really only useful during development and can eventually
731  * be #ifdef'd out once the driver is stable and folks aren't actively
732  * making changes
733  */
734 int iwl_check_rxon_cmd(struct iwl_priv *priv)
735 {
736         int error = 0;
737         int counter = 1;
738         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
739
740         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
741                 error |= le32_to_cpu(rxon->flags &
742                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
743                                  RXON_FLG_RADAR_DETECT_MSK));
744                 if (error)
745                         IWL_WARN(priv, "check 24G fields %d | %d\n",
746                                     counter++, error);
747         } else {
748                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
749                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
750                 if (error)
751                         IWL_WARN(priv, "check 52 fields %d | %d\n",
752                                     counter++, error);
753                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
754                 if (error)
755                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
756                                     counter++, error);
757         }
758         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
759         if (error)
760                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
761
762         /* make sure basic rates 6Mbps and 1Mbps are supported */
763         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
764                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
765         if (error)
766                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
767
768         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
769         if (error)
770                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
771
772         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
773                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
774         if (error)
775                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
776                             counter++, error);
777
778         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
779                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
780         if (error)
781                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
782                             counter++, error);
783
784         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
785                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
786         if (error)
787                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
788                             counter++, error);
789
790         if (error)
791                 IWL_WARN(priv, "Tuning to channel %d\n",
792                             le16_to_cpu(rxon->channel));
793
794         if (error) {
795                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
796                 return -1;
797         }
798         return 0;
799 }
800 EXPORT_SYMBOL(iwl_check_rxon_cmd);
801
802 /**
803  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
804  * @priv: staging_rxon is compared to active_rxon
805  *
806  * If the RXON structure is changing enough to require a new tune,
807  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
808  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
809  */
810 int iwl_full_rxon_required(struct iwl_priv *priv)
811 {
812
813         /* These items are only settable from the full RXON command */
814         if (!(iwl_is_associated(priv)) ||
815             compare_ether_addr(priv->staging_rxon.bssid_addr,
816                                priv->active_rxon.bssid_addr) ||
817             compare_ether_addr(priv->staging_rxon.node_addr,
818                                priv->active_rxon.node_addr) ||
819             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
820                                priv->active_rxon.wlap_bssid_addr) ||
821             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
822             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
823             (priv->staging_rxon.air_propagation !=
824              priv->active_rxon.air_propagation) ||
825             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
826              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
827             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
828              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
829             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
830              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
831             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
832                 return 1;
833
834         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
835          * be updated with the RXON_ASSOC command -- however only some
836          * flag transitions are allowed using RXON_ASSOC */
837
838         /* Check if we are not switching bands */
839         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
840             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
841                 return 1;
842
843         /* Check if we are switching association toggle */
844         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
845                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
846                 return 1;
847
848         return 0;
849 }
850 EXPORT_SYMBOL(iwl_full_rxon_required);
851
852 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
853 {
854         int i;
855         int rate_mask;
856
857         /* Set rate mask*/
858         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
859                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
860         else
861                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
862
863         /* Find lowest valid rate */
864         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
865                                         i = iwl_rates[i].next_ieee) {
866                 if (rate_mask & (1 << i))
867                         return iwl_rates[i].plcp;
868         }
869
870         /* No valid rate was found. Assign the lowest one */
871         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
872                 return IWL_RATE_1M_PLCP;
873         else
874                 return IWL_RATE_6M_PLCP;
875 }
876 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
877
878 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
879 {
880         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
881
882         if (!ht_conf->is_ht) {
883                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
884                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
885                         RXON_FLG_HT40_PROT_MSK |
886                         RXON_FLG_HT_PROT_MSK);
887                 return;
888         }
889
890         /* FIXME: if the definition of ht_protection changed, the "translation"
891          * will be needed for rxon->flags
892          */
893         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
894
895         /* Set up channel bandwidth:
896          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
897         /* clear the HT channel mode before set the mode */
898         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
899                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
900         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
901                 /* pure ht40 */
902                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
903                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
904                         /* Note: control channel is opposite of extension channel */
905                         switch (ht_conf->extension_chan_offset) {
906                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
907                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
908                                 break;
909                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
910                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
911                                 break;
912                         }
913                 } else {
914                         /* Note: control channel is opposite of extension channel */
915                         switch (ht_conf->extension_chan_offset) {
916                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
917                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
918                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
919                                 break;
920                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
921                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
922                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
923                                 break;
924                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
925                         default:
926                                 /* channel location only valid if in Mixed mode */
927                                 IWL_ERR(priv, "invalid extension channel offset\n");
928                                 break;
929                         }
930                 }
931         } else {
932                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
933         }
934
935         if (priv->cfg->ops->hcmd->set_rxon_chain)
936                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
937
938         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
939                         "extension channel offset 0x%x\n",
940                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
941                         ht_conf->extension_chan_offset);
942         return;
943 }
944 EXPORT_SYMBOL(iwl_set_rxon_ht);
945
946 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
947 #define IWL_NUM_RX_CHAINS_SINGLE        2
948 #define IWL_NUM_IDLE_CHAINS_DUAL        2
949 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
950
951 /*
952  * Determine how many receiver/antenna chains to use.
953  *
954  * More provides better reception via diversity.  Fewer saves power
955  * at the expense of throughput, but only when not in powersave to
956  * start with.
957  *
958  * MIMO (dual stream) requires at least 2, but works better with 3.
959  * This does not determine *which* chains to use, just how many.
960  */
961 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
962 {
963         /* # of Rx chains to use when expecting MIMO. */
964         if (is_single_rx_stream(priv))
965                 return IWL_NUM_RX_CHAINS_SINGLE;
966         else
967                 return IWL_NUM_RX_CHAINS_MULTIPLE;
968 }
969
970 /*
971  * When we are in power saving, there's no difference between
972  * using multiple chains or just a single chain, but due to the
973  * lack of SM PS we lose a lot of throughput if we use just a
974  * single chain.
975  *
976  * Therefore, use the active count here (which will use multiple
977  * chains unless connected to a legacy AP).
978  */
979 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
980 {
981         return active_cnt;
982 }
983
984 /* up to 4 chains */
985 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
986 {
987         u8 res;
988         res = (chain_bitmap & BIT(0)) >> 0;
989         res += (chain_bitmap & BIT(1)) >> 1;
990         res += (chain_bitmap & BIT(2)) >> 2;
991         res += (chain_bitmap & BIT(3)) >> 3;
992         return res;
993 }
994
995 /**
996  * iwl_is_monitor_mode - Determine if interface in monitor mode
997  *
998  * priv->iw_mode is set in add_interface, but add_interface is
999  * never called for monitor mode. The only way mac80211 informs us about
1000  * monitor mode is through configuring filters (call to configure_filter).
1001  */
1002 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1003 {
1004         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1005 }
1006 EXPORT_SYMBOL(iwl_is_monitor_mode);
1007
1008 /**
1009  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1010  *
1011  * Selects how many and which Rx receivers/antennas/chains to use.
1012  * This should not be used for scan command ... it puts data in wrong place.
1013  */
1014 void iwl_set_rxon_chain(struct iwl_priv *priv)
1015 {
1016         bool is_single = is_single_rx_stream(priv);
1017         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1018         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1019         u32 active_chains;
1020         u16 rx_chain;
1021
1022         /* Tell uCode which antennas are actually connected.
1023          * Before first association, we assume all antennas are connected.
1024          * Just after first association, iwl_chain_noise_calibration()
1025          *    checks which antennas actually *are* connected. */
1026          if (priv->chain_noise_data.active_chains)
1027                 active_chains = priv->chain_noise_data.active_chains;
1028         else
1029                 active_chains = priv->hw_params.valid_rx_ant;
1030
1031         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1032
1033         /* How many receivers should we use? */
1034         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1035         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1036
1037
1038         /* correct rx chain count according hw settings
1039          * and chain noise calibration
1040          */
1041         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1042         if (valid_rx_cnt < active_rx_cnt)
1043                 active_rx_cnt = valid_rx_cnt;
1044
1045         if (valid_rx_cnt < idle_rx_cnt)
1046                 idle_rx_cnt = valid_rx_cnt;
1047
1048         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1049         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1050
1051         /* copied from 'iwl_bg_request_scan()' */
1052         /* Force use of chains B and C (0x6) for Rx for 4965
1053          * Avoid A (0x1) because of its off-channel reception on A-band.
1054          * MIMO is not used here, but value is required */
1055         if (iwl_is_monitor_mode(priv) &&
1056             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1057             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1058                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1059                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1060                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1061                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1062         }
1063
1064         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1065
1066         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1067                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1068         else
1069                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1070
1071         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1072                         priv->staging_rxon.rx_chain,
1073                         active_rx_cnt, idle_rx_cnt);
1074
1075         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1076                 active_rx_cnt < idle_rx_cnt);
1077 }
1078 EXPORT_SYMBOL(iwl_set_rxon_chain);
1079
1080 /**
1081  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1082  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1083  * @channel: Any channel valid for the requested phymode
1084
1085  * In addition to setting the staging RXON, priv->phymode is also set.
1086  *
1087  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1088  * in the staging RXON flag structure based on the phymode
1089  */
1090 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1091 {
1092         enum ieee80211_band band = ch->band;
1093         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1094
1095         if (!iwl_get_channel_info(priv, band, channel)) {
1096                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1097                                channel, band);
1098                 return -EINVAL;
1099         }
1100
1101         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1102             (priv->band == band))
1103                 return 0;
1104
1105         priv->staging_rxon.channel = cpu_to_le16(channel);
1106         if (band == IEEE80211_BAND_5GHZ)
1107                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1108         else
1109                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1110
1111         priv->band = band;
1112
1113         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1114
1115         return 0;
1116 }
1117 EXPORT_SYMBOL(iwl_set_rxon_channel);
1118
1119 void iwl_set_flags_for_band(struct iwl_priv *priv,
1120                             enum ieee80211_band band)
1121 {
1122         if (band == IEEE80211_BAND_5GHZ) {
1123                 priv->staging_rxon.flags &=
1124                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1125                       | RXON_FLG_CCK_MSK);
1126                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1127         } else {
1128                 /* Copied from iwl_post_associate() */
1129                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1130                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1131                 else
1132                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1133
1134                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1135                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1136
1137                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1138                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1139                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1140         }
1141 }
1142
1143 /*
1144  * initialize rxon structure with default values from eeprom
1145  */
1146 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1147 {
1148         const struct iwl_channel_info *ch_info;
1149
1150         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1151
1152         switch (mode) {
1153         case NL80211_IFTYPE_AP:
1154                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1155                 break;
1156
1157         case NL80211_IFTYPE_STATION:
1158                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1159                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1160                 break;
1161
1162         case NL80211_IFTYPE_ADHOC:
1163                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1164                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1165                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1166                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1167                 break;
1168
1169         default:
1170                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1171                 break;
1172         }
1173
1174 #if 0
1175         /* TODO:  Figure out when short_preamble would be set and cache from
1176          * that */
1177         if (!hw_to_local(priv->hw)->short_preamble)
1178                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1179         else
1180                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1181 #endif
1182
1183         ch_info = iwl_get_channel_info(priv, priv->band,
1184                                        le16_to_cpu(priv->active_rxon.channel));
1185
1186         if (!ch_info)
1187                 ch_info = &priv->channel_info[0];
1188
1189         /*
1190          * in some case A channels are all non IBSS
1191          * in this case force B/G channel
1192          */
1193         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1194             !(is_channel_ibss(ch_info)))
1195                 ch_info = &priv->channel_info[0];
1196
1197         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1198         priv->band = ch_info->band;
1199
1200         iwl_set_flags_for_band(priv, priv->band);
1201
1202         priv->staging_rxon.ofdm_basic_rates =
1203             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1204         priv->staging_rxon.cck_basic_rates =
1205             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1206
1207         /* clear both MIX and PURE40 mode flag */
1208         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1209                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1210         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1211         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1212         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1213         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1214         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1215 }
1216 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1217
1218 static void iwl_set_rate(struct iwl_priv *priv)
1219 {
1220         const struct ieee80211_supported_band *hw = NULL;
1221         struct ieee80211_rate *rate;
1222         int i;
1223
1224         hw = iwl_get_hw_mode(priv, priv->band);
1225         if (!hw) {
1226                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1227                 return;
1228         }
1229
1230         priv->active_rate = 0;
1231         priv->active_rate_basic = 0;
1232
1233         for (i = 0; i < hw->n_bitrates; i++) {
1234                 rate = &(hw->bitrates[i]);
1235                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1236                         priv->active_rate |= (1 << rate->hw_value);
1237         }
1238
1239         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1240                        priv->active_rate, priv->active_rate_basic);
1241
1242         /*
1243          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1244          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1245          * OFDM
1246          */
1247         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1248                 priv->staging_rxon.cck_basic_rates =
1249                     ((priv->active_rate_basic &
1250                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1251         else
1252                 priv->staging_rxon.cck_basic_rates =
1253                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1254
1255         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1256                 priv->staging_rxon.ofdm_basic_rates =
1257                     ((priv->active_rate_basic &
1258                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1259                       IWL_FIRST_OFDM_RATE) & 0xFF;
1260         else
1261                 priv->staging_rxon.ofdm_basic_rates =
1262                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1263 }
1264
1265 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1266 {
1267         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1268         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1269         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1270         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1271                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1272         rxon->channel = csa->channel;
1273         priv->staging_rxon.channel = csa->channel;
1274 }
1275 EXPORT_SYMBOL(iwl_rx_csa);
1276
1277 #ifdef CONFIG_IWLWIFI_DEBUG
1278 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1279 {
1280         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1281
1282         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1283         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1284         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1285         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1286         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1287                         le32_to_cpu(rxon->filter_flags));
1288         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1289         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1290                         rxon->ofdm_basic_rates);
1291         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1292         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1293         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1294         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1295 }
1296 #endif
1297 /**
1298  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1299  */
1300 void iwl_irq_handle_error(struct iwl_priv *priv)
1301 {
1302         /* Set the FW error flag -- cleared on iwl_down */
1303         set_bit(STATUS_FW_ERROR, &priv->status);
1304
1305         /* Cancel currently queued command. */
1306         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1307
1308 #ifdef CONFIG_IWLWIFI_DEBUG
1309         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1310                 priv->cfg->ops->lib->dump_nic_error_log(priv);
1311                 priv->cfg->ops->lib->dump_nic_event_log(priv);
1312                 iwl_print_rx_config_cmd(priv);
1313         }
1314 #endif
1315
1316         wake_up_interruptible(&priv->wait_command_queue);
1317
1318         /* Keep the restart process from trying to send host
1319          * commands by clearing the INIT status bit */
1320         clear_bit(STATUS_READY, &priv->status);
1321
1322         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1323                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1324                           "Restarting adapter due to uCode error.\n");
1325
1326                 if (priv->cfg->mod_params->restart_fw)
1327                         queue_work(priv->workqueue, &priv->restart);
1328         }
1329 }
1330 EXPORT_SYMBOL(iwl_irq_handle_error);
1331
1332 int iwl_apm_stop_master(struct iwl_priv *priv)
1333 {
1334         unsigned long flags;
1335
1336         spin_lock_irqsave(&priv->lock, flags);
1337
1338         /* set stop master bit */
1339         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1340
1341         iwl_poll_direct_bit(priv, CSR_RESET,
1342                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1343
1344         spin_unlock_irqrestore(&priv->lock, flags);
1345         IWL_DEBUG_INFO(priv, "stop master\n");
1346
1347         return 0;
1348 }
1349 EXPORT_SYMBOL(iwl_apm_stop_master);
1350
1351 void iwl_apm_stop(struct iwl_priv *priv)
1352 {
1353         unsigned long flags;
1354
1355         iwl_apm_stop_master(priv);
1356
1357         spin_lock_irqsave(&priv->lock, flags);
1358
1359         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1360
1361         udelay(10);
1362         /* clear "init complete"  move adapter D0A* --> D0U state */
1363         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1364         spin_unlock_irqrestore(&priv->lock, flags);
1365 }
1366 EXPORT_SYMBOL(iwl_apm_stop);
1367
1368 void iwl_configure_filter(struct ieee80211_hw *hw,
1369                           unsigned int changed_flags,
1370                           unsigned int *total_flags,
1371                           u64 multicast)
1372 {
1373         struct iwl_priv *priv = hw->priv;
1374         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1375
1376         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1377                         changed_flags, *total_flags);
1378
1379         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1380                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1381                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1382                 else
1383                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1384         }
1385         if (changed_flags & FIF_ALLMULTI) {
1386                 if (*total_flags & FIF_ALLMULTI)
1387                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1388                 else
1389                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1390         }
1391         if (changed_flags & FIF_CONTROL) {
1392                 if (*total_flags & FIF_CONTROL)
1393                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1394                 else
1395                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1396         }
1397         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1398                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1399                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1400                 else
1401                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1402         }
1403
1404         /* We avoid iwl_commit_rxon here to commit the new filter flags
1405          * since mac80211 will call ieee80211_hw_config immediately.
1406          * (mc_list is not supported at this time). Otherwise, we need to
1407          * queue a background iwl_commit_rxon work.
1408          */
1409
1410         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1411                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1412 }
1413 EXPORT_SYMBOL(iwl_configure_filter);
1414
1415 int iwl_setup_mac(struct iwl_priv *priv)
1416 {
1417         int ret;
1418         struct ieee80211_hw *hw = priv->hw;
1419         hw->rate_control_algorithm = "iwl-agn-rs";
1420
1421         /* Tell mac80211 our characteristics */
1422         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1423                     IEEE80211_HW_NOISE_DBM |
1424                     IEEE80211_HW_AMPDU_AGGREGATION |
1425                     IEEE80211_HW_SPECTRUM_MGMT;
1426
1427         if (!priv->cfg->broken_powersave)
1428                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
1429                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
1430
1431         hw->wiphy->interface_modes =
1432                 BIT(NL80211_IFTYPE_STATION) |
1433                 BIT(NL80211_IFTYPE_ADHOC);
1434
1435         hw->wiphy->custom_regulatory = true;
1436
1437         /* Firmware does not support this */
1438         hw->wiphy->disable_beacon_hints = true;
1439
1440         /*
1441          * For now, disable PS by default because it affects
1442          * RX performance significantly.
1443          */
1444         hw->wiphy->ps_default = false;
1445
1446         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1447         /* we create the 802.11 header and a zero-length SSID element */
1448         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1449
1450         /* Default value; 4 EDCA QOS priorities */
1451         hw->queues = 4;
1452
1453         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1454
1455         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1456                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1457                         &priv->bands[IEEE80211_BAND_2GHZ];
1458         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1459                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1460                         &priv->bands[IEEE80211_BAND_5GHZ];
1461
1462         ret = ieee80211_register_hw(priv->hw);
1463         if (ret) {
1464                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1465                 return ret;
1466         }
1467         priv->mac80211_registered = 1;
1468
1469         return 0;
1470 }
1471 EXPORT_SYMBOL(iwl_setup_mac);
1472
1473 int iwl_set_hw_params(struct iwl_priv *priv)
1474 {
1475         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1476         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1477         if (priv->cfg->mod_params->amsdu_size_8K)
1478                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1479         else
1480                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1481         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1482
1483         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1484
1485         if (priv->cfg->mod_params->disable_11n)
1486                 priv->cfg->sku &= ~IWL_SKU_N;
1487
1488         /* Device-specific setup */
1489         return priv->cfg->ops->lib->set_hw_params(priv);
1490 }
1491 EXPORT_SYMBOL(iwl_set_hw_params);
1492
1493 int iwl_init_drv(struct iwl_priv *priv)
1494 {
1495         int ret;
1496
1497         priv->ibss_beacon = NULL;
1498
1499         spin_lock_init(&priv->lock);
1500         spin_lock_init(&priv->sta_lock);
1501         spin_lock_init(&priv->hcmd_lock);
1502
1503         INIT_LIST_HEAD(&priv->free_frames);
1504
1505         mutex_init(&priv->mutex);
1506
1507         /* Clear the driver's (not device's) station table */
1508         iwl_clear_stations_table(priv);
1509
1510         priv->data_retry_limit = -1;
1511         priv->ieee_channels = NULL;
1512         priv->ieee_rates = NULL;
1513         priv->band = IEEE80211_BAND_2GHZ;
1514
1515         priv->iw_mode = NL80211_IFTYPE_STATION;
1516
1517         /* Choose which receivers/antennas to use */
1518         if (priv->cfg->ops->hcmd->set_rxon_chain)
1519                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1520
1521         iwl_init_scan_params(priv);
1522
1523         iwl_reset_qos(priv);
1524
1525         priv->qos_data.qos_active = 0;
1526         priv->qos_data.qos_cap.val = 0;
1527
1528         priv->rates_mask = IWL_RATES_MASK;
1529         /* Set the tx_power_user_lmt to the lowest power level
1530          * this value will get overwritten by channel max power avg
1531          * from eeprom */
1532         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
1533
1534         ret = iwl_init_channel_map(priv);
1535         if (ret) {
1536                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1537                 goto err;
1538         }
1539
1540         ret = iwlcore_init_geos(priv);
1541         if (ret) {
1542                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1543                 goto err_free_channel_map;
1544         }
1545         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1546
1547         return 0;
1548
1549 err_free_channel_map:
1550         iwl_free_channel_map(priv);
1551 err:
1552         return ret;
1553 }
1554 EXPORT_SYMBOL(iwl_init_drv);
1555
1556 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1557 {
1558         int ret = 0;
1559         s8 prev_tx_power = priv->tx_power_user_lmt;
1560
1561         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1562                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1563                          tx_power,
1564                          IWL_TX_POWER_TARGET_POWER_MIN);
1565                 return -EINVAL;
1566         }
1567
1568         if (tx_power > priv->tx_power_device_lmt) {
1569                 IWL_WARN(priv,
1570                         "Requested user TXPOWER %d above upper limit %d.\n",
1571                          tx_power, priv->tx_power_device_lmt);
1572                 return -EINVAL;
1573         }
1574
1575         if (priv->tx_power_user_lmt != tx_power)
1576                 force = true;
1577
1578         /* if nic is not up don't send command */
1579         if (iwl_is_ready_rf(priv)) {
1580                 priv->tx_power_user_lmt = tx_power;
1581                 if (force && priv->cfg->ops->lib->send_tx_power)
1582                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1583                 else if (!priv->cfg->ops->lib->send_tx_power)
1584                         ret = -EOPNOTSUPP;
1585                 /*
1586                  * if fail to set tx_power, restore the orig. tx power
1587                  */
1588                 if (ret)
1589                         priv->tx_power_user_lmt = prev_tx_power;
1590         }
1591
1592         /*
1593          * Even this is an async host command, the command
1594          * will always report success from uCode
1595          * So once driver can placing the command into the queue
1596          * successfully, driver can use priv->tx_power_user_lmt
1597          * to reflect the current tx power
1598          */
1599         return ret;
1600 }
1601 EXPORT_SYMBOL(iwl_set_tx_power);
1602
1603 void iwl_uninit_drv(struct iwl_priv *priv)
1604 {
1605         iwl_calib_free_results(priv);
1606         iwlcore_free_geos(priv);
1607         iwl_free_channel_map(priv);
1608         kfree(priv->scan);
1609 }
1610 EXPORT_SYMBOL(iwl_uninit_drv);
1611
1612 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1613
1614 /* Free dram table */
1615 void iwl_free_isr_ict(struct iwl_priv *priv)
1616 {
1617         if (priv->ict_tbl_vir) {
1618                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1619                                         PAGE_SIZE, priv->ict_tbl_vir,
1620                                         priv->ict_tbl_dma);
1621                 priv->ict_tbl_vir = NULL;
1622         }
1623 }
1624 EXPORT_SYMBOL(iwl_free_isr_ict);
1625
1626
1627 /* allocate dram shared table it is a PAGE_SIZE aligned
1628  * also reset all data related to ICT table interrupt.
1629  */
1630 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1631 {
1632
1633         if (priv->cfg->use_isr_legacy)
1634                 return 0;
1635         /* allocate shrared data table */
1636         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1637                                                   ICT_COUNT) + PAGE_SIZE,
1638                                                   &priv->ict_tbl_dma);
1639         if (!priv->ict_tbl_vir)
1640                 return -ENOMEM;
1641
1642         /* align table to PAGE_SIZE boundry */
1643         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1644
1645         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1646                              (unsigned long long)priv->ict_tbl_dma,
1647                              (unsigned long long)priv->aligned_ict_tbl_dma,
1648                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1649
1650         priv->ict_tbl =  priv->ict_tbl_vir +
1651                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1652
1653         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1654                              priv->ict_tbl, priv->ict_tbl_vir,
1655                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1656
1657         /* reset table and index to all 0 */
1658         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1659         priv->ict_index = 0;
1660
1661         /* add periodic RX interrupt */
1662         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1663         return 0;
1664 }
1665 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1666
1667 /* Device is going up inform it about using ICT interrupt table,
1668  * also we need to tell the driver to start using ICT interrupt.
1669  */
1670 int iwl_reset_ict(struct iwl_priv *priv)
1671 {
1672         u32 val;
1673         unsigned long flags;
1674
1675         if (!priv->ict_tbl_vir)
1676                 return 0;
1677
1678         spin_lock_irqsave(&priv->lock, flags);
1679         iwl_disable_interrupts(priv);
1680
1681         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1682
1683         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1684
1685         val |= CSR_DRAM_INT_TBL_ENABLE;
1686         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1687
1688         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1689                         "aligned dma address %Lx\n",
1690                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1691
1692         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1693         priv->use_ict = true;
1694         priv->ict_index = 0;
1695         iwl_write32(priv, CSR_INT, priv->inta_mask);
1696         iwl_enable_interrupts(priv);
1697         spin_unlock_irqrestore(&priv->lock, flags);
1698
1699         return 0;
1700 }
1701 EXPORT_SYMBOL(iwl_reset_ict);
1702
1703 /* Device is going down disable ict interrupt usage */
1704 void iwl_disable_ict(struct iwl_priv *priv)
1705 {
1706         unsigned long flags;
1707
1708         spin_lock_irqsave(&priv->lock, flags);
1709         priv->use_ict = false;
1710         spin_unlock_irqrestore(&priv->lock, flags);
1711 }
1712 EXPORT_SYMBOL(iwl_disable_ict);
1713
1714 /* interrupt handler using ict table, with this interrupt driver will
1715  * stop using INTA register to get device's interrupt, reading this register
1716  * is expensive, device will write interrupts in ICT dram table, increment
1717  * index then will fire interrupt to driver, driver will OR all ICT table
1718  * entries from current index up to table entry with 0 value. the result is
1719  * the interrupt we need to service, driver will set the entries back to 0 and
1720  * set index.
1721  */
1722 irqreturn_t iwl_isr_ict(int irq, void *data)
1723 {
1724         struct iwl_priv *priv = data;
1725         u32 inta, inta_mask;
1726         u32 val = 0;
1727
1728         if (!priv)
1729                 return IRQ_NONE;
1730
1731         /* dram interrupt table not set yet,
1732          * use legacy interrupt.
1733          */
1734         if (!priv->use_ict)
1735                 return iwl_isr(irq, data);
1736
1737         spin_lock(&priv->lock);
1738
1739         /* Disable (but don't clear!) interrupts here to avoid
1740          * back-to-back ISRs and sporadic interrupts from our NIC.
1741          * If we have something to service, the tasklet will re-enable ints.
1742          * If we *don't* have something, we'll re-enable before leaving here.
1743          */
1744         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1745         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1746
1747
1748         /* Ignore interrupt if there's nothing in NIC to service.
1749          * This may be due to IRQ shared with another device,
1750          * or due to sporadic interrupts thrown from our NIC. */
1751         if (!priv->ict_tbl[priv->ict_index]) {
1752                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1753                 goto none;
1754         }
1755
1756         /* read all entries that not 0 start with ict_index */
1757         while (priv->ict_tbl[priv->ict_index]) {
1758
1759                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1760                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1761                                 priv->ict_index,
1762                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1763                 priv->ict_tbl[priv->ict_index] = 0;
1764                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1765                                                      ICT_COUNT);
1766
1767         }
1768
1769         /* We should not get this value, just ignore it. */
1770         if (val == 0xffffffff)
1771                 val = 0;
1772
1773         inta = (0xff & val) | ((0xff00 & val) << 16);
1774         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1775                         inta, inta_mask, val);
1776
1777         inta &= priv->inta_mask;
1778         priv->inta |= inta;
1779
1780         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1781         if (likely(inta))
1782                 tasklet_schedule(&priv->irq_tasklet);
1783         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1784                 /* Allow interrupt if was disabled by this handler and
1785                  * no tasklet was schedules, We should not enable interrupt,
1786                  * tasklet will enable it.
1787                  */
1788                 iwl_enable_interrupts(priv);
1789         }
1790
1791         spin_unlock(&priv->lock);
1792         return IRQ_HANDLED;
1793
1794  none:
1795         /* re-enable interrupts here since we don't have anything to service.
1796          * only Re-enable if disabled by irq.
1797          */
1798         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1799                 iwl_enable_interrupts(priv);
1800
1801         spin_unlock(&priv->lock);
1802         return IRQ_NONE;
1803 }
1804 EXPORT_SYMBOL(iwl_isr_ict);
1805
1806
1807 static irqreturn_t iwl_isr(int irq, void *data)
1808 {
1809         struct iwl_priv *priv = data;
1810         u32 inta, inta_mask;
1811 #ifdef CONFIG_IWLWIFI_DEBUG
1812         u32 inta_fh;
1813 #endif
1814         if (!priv)
1815                 return IRQ_NONE;
1816
1817         spin_lock(&priv->lock);
1818
1819         /* Disable (but don't clear!) interrupts here to avoid
1820          *    back-to-back ISRs and sporadic interrupts from our NIC.
1821          * If we have something to service, the tasklet will re-enable ints.
1822          * If we *don't* have something, we'll re-enable before leaving here. */
1823         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1824         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1825
1826         /* Discover which interrupts are active/pending */
1827         inta = iwl_read32(priv, CSR_INT);
1828
1829         /* Ignore interrupt if there's nothing in NIC to service.
1830          * This may be due to IRQ shared with another device,
1831          * or due to sporadic interrupts thrown from our NIC. */
1832         if (!inta) {
1833                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1834                 goto none;
1835         }
1836
1837         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1838                 /* Hardware disappeared. It might have already raised
1839                  * an interrupt */
1840                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1841                 goto unplugged;
1842         }
1843
1844 #ifdef CONFIG_IWLWIFI_DEBUG
1845         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1846                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1847                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1848                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1849         }
1850 #endif
1851
1852         priv->inta |= inta;
1853         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1854         if (likely(inta))
1855                 tasklet_schedule(&priv->irq_tasklet);
1856         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1857                 iwl_enable_interrupts(priv);
1858
1859  unplugged:
1860         spin_unlock(&priv->lock);
1861         return IRQ_HANDLED;
1862
1863  none:
1864         /* re-enable interrupts here since we don't have anything to service. */
1865         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1866         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1867                 iwl_enable_interrupts(priv);
1868
1869         spin_unlock(&priv->lock);
1870         return IRQ_NONE;
1871 }
1872
1873 irqreturn_t iwl_isr_legacy(int irq, void *data)
1874 {
1875         struct iwl_priv *priv = data;
1876         u32 inta, inta_mask;
1877         u32 inta_fh;
1878         if (!priv)
1879                 return IRQ_NONE;
1880
1881         spin_lock(&priv->lock);
1882
1883         /* Disable (but don't clear!) interrupts here to avoid
1884          *    back-to-back ISRs and sporadic interrupts from our NIC.
1885          * If we have something to service, the tasklet will re-enable ints.
1886          * If we *don't* have something, we'll re-enable before leaving here. */
1887         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1888         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1889
1890         /* Discover which interrupts are active/pending */
1891         inta = iwl_read32(priv, CSR_INT);
1892         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1893
1894         /* Ignore interrupt if there's nothing in NIC to service.
1895          * This may be due to IRQ shared with another device,
1896          * or due to sporadic interrupts thrown from our NIC. */
1897         if (!inta && !inta_fh) {
1898                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1899                 goto none;
1900         }
1901
1902         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1903                 /* Hardware disappeared. It might have already raised
1904                  * an interrupt */
1905                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1906                 goto unplugged;
1907         }
1908
1909         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1910                       inta, inta_mask, inta_fh);
1911
1912         inta &= ~CSR_INT_BIT_SCD;
1913
1914         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1915         if (likely(inta || inta_fh))
1916                 tasklet_schedule(&priv->irq_tasklet);
1917
1918  unplugged:
1919         spin_unlock(&priv->lock);
1920         return IRQ_HANDLED;
1921
1922  none:
1923         /* re-enable interrupts here since we don't have anything to service. */
1924         /* only Re-enable if diabled by irq */
1925         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1926                 iwl_enable_interrupts(priv);
1927         spin_unlock(&priv->lock);
1928         return IRQ_NONE;
1929 }
1930 EXPORT_SYMBOL(iwl_isr_legacy);
1931
1932 int iwl_send_bt_config(struct iwl_priv *priv)
1933 {
1934         struct iwl_bt_cmd bt_cmd = {
1935                 .flags = 3,
1936                 .lead_time = 0xAA,
1937                 .max_kill = 1,
1938                 .kill_ack_mask = 0,
1939                 .kill_cts_mask = 0,
1940         };
1941
1942         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1943                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1944 }
1945 EXPORT_SYMBOL(iwl_send_bt_config);
1946
1947 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1948 {
1949         u32 stat_flags = 0;
1950         struct iwl_host_cmd cmd = {
1951                 .id = REPLY_STATISTICS_CMD,
1952                 .flags = flags,
1953                 .len = sizeof(stat_flags),
1954                 .data = (u8 *) &stat_flags,
1955         };
1956         return iwl_send_cmd(priv, &cmd);
1957 }
1958 EXPORT_SYMBOL(iwl_send_statistics_request);
1959
1960 /**
1961  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1962  *   using sample data 100 bytes apart.  If these sample points are good,
1963  *   it's a pretty good bet that everything between them is good, too.
1964  */
1965 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1966 {
1967         u32 val;
1968         int ret = 0;
1969         u32 errcnt = 0;
1970         u32 i;
1971
1972         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1973
1974         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1975                 /* read data comes through single port, auto-incr addr */
1976                 /* NOTE: Use the debugless read so we don't flood kernel log
1977                  * if IWL_DL_IO is set */
1978                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1979                         i + IWL49_RTC_INST_LOWER_BOUND);
1980                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1981                 if (val != le32_to_cpu(*image)) {
1982                         ret = -EIO;
1983                         errcnt++;
1984                         if (errcnt >= 3)
1985                                 break;
1986                 }
1987         }
1988
1989         return ret;
1990 }
1991
1992 /**
1993  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1994  *     looking at all data.
1995  */
1996 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1997                                  u32 len)
1998 {
1999         u32 val;
2000         u32 save_len = len;
2001         int ret = 0;
2002         u32 errcnt;
2003
2004         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2005
2006         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2007                            IWL49_RTC_INST_LOWER_BOUND);
2008
2009         errcnt = 0;
2010         for (; len > 0; len -= sizeof(u32), image++) {
2011                 /* read data comes through single port, auto-incr addr */
2012                 /* NOTE: Use the debugless read so we don't flood kernel log
2013                  * if IWL_DL_IO is set */
2014                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2015                 if (val != le32_to_cpu(*image)) {
2016                         IWL_ERR(priv, "uCode INST section is invalid at "
2017                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2018                                   save_len - len, val, le32_to_cpu(*image));
2019                         ret = -EIO;
2020                         errcnt++;
2021                         if (errcnt >= 20)
2022                                 break;
2023                 }
2024         }
2025
2026         if (!errcnt)
2027                 IWL_DEBUG_INFO(priv,
2028                     "ucode image in INSTRUCTION memory is good\n");
2029
2030         return ret;
2031 }
2032
2033 /**
2034  * iwl_verify_ucode - determine which instruction image is in SRAM,
2035  *    and verify its contents
2036  */
2037 int iwl_verify_ucode(struct iwl_priv *priv)
2038 {
2039         __le32 *image;
2040         u32 len;
2041         int ret;
2042
2043         /* Try bootstrap */
2044         image = (__le32 *)priv->ucode_boot.v_addr;
2045         len = priv->ucode_boot.len;
2046         ret = iwlcore_verify_inst_sparse(priv, image, len);
2047         if (!ret) {
2048                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2049                 return 0;
2050         }
2051
2052         /* Try initialize */
2053         image = (__le32 *)priv->ucode_init.v_addr;
2054         len = priv->ucode_init.len;
2055         ret = iwlcore_verify_inst_sparse(priv, image, len);
2056         if (!ret) {
2057                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2058                 return 0;
2059         }
2060
2061         /* Try runtime/protocol */
2062         image = (__le32 *)priv->ucode_code.v_addr;
2063         len = priv->ucode_code.len;
2064         ret = iwlcore_verify_inst_sparse(priv, image, len);
2065         if (!ret) {
2066                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2067                 return 0;
2068         }
2069
2070         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2071
2072         /* Since nothing seems to match, show first several data entries in
2073          * instruction SRAM, so maybe visual inspection will give a clue.
2074          * Selection of bootstrap image (vs. other images) is arbitrary. */
2075         image = (__le32 *)priv->ucode_boot.v_addr;
2076         len = priv->ucode_boot.len;
2077         ret = iwl_verify_inst_full(priv, image, len);
2078
2079         return ret;
2080 }
2081 EXPORT_SYMBOL(iwl_verify_ucode);
2082
2083
2084 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2085 {
2086         struct iwl_ct_kill_config cmd;
2087         struct iwl_ct_kill_throttling_config adv_cmd;
2088         unsigned long flags;
2089         int ret = 0;
2090
2091         spin_lock_irqsave(&priv->lock, flags);
2092         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2093                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2094         spin_unlock_irqrestore(&priv->lock, flags);
2095         priv->thermal_throttle.ct_kill_toggle = false;
2096
2097         switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
2098         case CSR_HW_REV_TYPE_1000:
2099         case CSR_HW_REV_TYPE_6x00:
2100         case CSR_HW_REV_TYPE_6x50:
2101                 adv_cmd.critical_temperature_enter =
2102                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2103                 adv_cmd.critical_temperature_exit =
2104                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2105
2106                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2107                                        sizeof(adv_cmd), &adv_cmd);
2108                 if (ret)
2109                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2110                 else
2111                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2112                                         "succeeded, "
2113                                         "critical temperature enter is %d,"
2114                                         "exit is %d\n",
2115                                        priv->hw_params.ct_kill_threshold,
2116                                        priv->hw_params.ct_kill_exit_threshold);
2117                 break;
2118         default:
2119                 cmd.critical_temperature_R =
2120                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2121
2122                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2123                                        sizeof(cmd), &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 is %d\n",
2130                                         priv->hw_params.ct_kill_threshold);
2131                 break;
2132         }
2133 }
2134 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2135
2136
2137 /*
2138  * CARD_STATE_CMD
2139  *
2140  * Use: Sets the device's internal card state to enable, disable, or halt
2141  *
2142  * When in the 'enable' state the card operates as normal.
2143  * When in the 'disable' state, the card enters into a low power mode.
2144  * When in the 'halt' state, the card is shut down and must be fully
2145  * restarted to come back on.
2146  */
2147 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2148 {
2149         struct iwl_host_cmd cmd = {
2150                 .id = REPLY_CARD_STATE_CMD,
2151                 .len = sizeof(u32),
2152                 .data = &flags,
2153                 .flags = meta_flag,
2154         };
2155
2156         return iwl_send_cmd(priv, &cmd);
2157 }
2158
2159 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2160                            struct iwl_rx_mem_buffer *rxb)
2161 {
2162 #ifdef CONFIG_IWLWIFI_DEBUG
2163         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2164         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2165         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2166                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2167 #endif
2168 }
2169 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2170
2171 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2172                                       struct iwl_rx_mem_buffer *rxb)
2173 {
2174         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2175         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2176         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2177                         "notification for %s:\n", len,
2178                         get_cmd_string(pkt->hdr.cmd));
2179         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2180 }
2181 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2182
2183 void iwl_rx_reply_error(struct iwl_priv *priv,
2184                         struct iwl_rx_mem_buffer *rxb)
2185 {
2186         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2187
2188         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2189                 "seq 0x%04X ser 0x%08X\n",
2190                 le32_to_cpu(pkt->u.err_resp.error_type),
2191                 get_cmd_string(pkt->u.err_resp.cmd_id),
2192                 pkt->u.err_resp.cmd_id,
2193                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2194                 le32_to_cpu(pkt->u.err_resp.error_info));
2195 }
2196 EXPORT_SYMBOL(iwl_rx_reply_error);
2197
2198 void iwl_clear_isr_stats(struct iwl_priv *priv)
2199 {
2200         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2201 }
2202
2203 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2204                            const struct ieee80211_tx_queue_params *params)
2205 {
2206         struct iwl_priv *priv = hw->priv;
2207         unsigned long flags;
2208         int q;
2209
2210         IWL_DEBUG_MAC80211(priv, "enter\n");
2211
2212         if (!iwl_is_ready_rf(priv)) {
2213                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2214                 return -EIO;
2215         }
2216
2217         if (queue >= AC_NUM) {
2218                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2219                 return 0;
2220         }
2221
2222         q = AC_NUM - 1 - queue;
2223
2224         spin_lock_irqsave(&priv->lock, flags);
2225
2226         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2227         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2228         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2229         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2230                         cpu_to_le16((params->txop * 32));
2231
2232         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2233         priv->qos_data.qos_active = 1;
2234
2235         if (priv->iw_mode == NL80211_IFTYPE_AP)
2236                 iwl_activate_qos(priv, 1);
2237         else if (priv->assoc_id && iwl_is_associated(priv))
2238                 iwl_activate_qos(priv, 0);
2239
2240         spin_unlock_irqrestore(&priv->lock, flags);
2241
2242         IWL_DEBUG_MAC80211(priv, "leave\n");
2243         return 0;
2244 }
2245 EXPORT_SYMBOL(iwl_mac_conf_tx);
2246
2247 static void iwl_ht_conf(struct iwl_priv *priv,
2248                         struct ieee80211_bss_conf *bss_conf)
2249 {
2250         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2251         struct ieee80211_sta *sta;
2252
2253         IWL_DEBUG_MAC80211(priv, "enter: \n");
2254
2255         if (!ht_conf->is_ht)
2256                 return;
2257
2258         ht_conf->ht_protection =
2259                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2260         ht_conf->non_GF_STA_present =
2261                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2262
2263         ht_conf->single_chain_sufficient = false;
2264
2265         switch (priv->iw_mode) {
2266         case NL80211_IFTYPE_STATION:
2267                 rcu_read_lock();
2268                 sta = ieee80211_find_sta(priv->hw, priv->bssid);
2269                 if (sta) {
2270                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2271                         int maxstreams;
2272
2273                         maxstreams = (ht_cap->mcs.tx_params &
2274                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2275                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2276                         maxstreams += 1;
2277
2278                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2279                             (ht_cap->mcs.rx_mask[2] == 0))
2280                                 ht_conf->single_chain_sufficient = true;
2281                         if (maxstreams <= 1)
2282                                 ht_conf->single_chain_sufficient = true;
2283                 } else {
2284                         /*
2285                          * If at all, this can only happen through a race
2286                          * when the AP disconnects us while we're still
2287                          * setting up the connection, in that case mac80211
2288                          * will soon tell us about that.
2289                          */
2290                         ht_conf->single_chain_sufficient = true;
2291                 }
2292                 rcu_read_unlock();
2293                 break;
2294         case NL80211_IFTYPE_ADHOC:
2295                 ht_conf->single_chain_sufficient = true;
2296                 break;
2297         default:
2298                 break;
2299         }
2300
2301         IWL_DEBUG_MAC80211(priv, "leave\n");
2302 }
2303
2304 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2305 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2306                           struct ieee80211_vif *vif,
2307                           struct ieee80211_bss_conf *bss_conf,
2308                           u32 changes)
2309 {
2310         struct iwl_priv *priv = hw->priv;
2311         int ret;
2312
2313         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2314
2315         if (!iwl_is_alive(priv))
2316                 return;
2317
2318         mutex_lock(&priv->mutex);
2319
2320         if (changes & BSS_CHANGED_BEACON &&
2321             priv->iw_mode == NL80211_IFTYPE_AP) {
2322                 dev_kfree_skb(priv->ibss_beacon);
2323                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2324         }
2325
2326         if (changes & BSS_CHANGED_BEACON_INT) {
2327                 priv->beacon_int = bss_conf->beacon_int;
2328                 /* TODO: in AP mode, do something to make this take effect */
2329         }
2330
2331         if (changes & BSS_CHANGED_BSSID) {
2332                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2333
2334                 /*
2335                  * If there is currently a HW scan going on in the
2336                  * background then we need to cancel it else the RXON
2337                  * below/in post_associate will fail.
2338                  */
2339                 if (iwl_scan_cancel_timeout(priv, 100)) {
2340                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2341                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2342                         mutex_unlock(&priv->mutex);
2343                         return;
2344                 }
2345
2346                 /* mac80211 only sets assoc when in STATION mode */
2347                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2348                     bss_conf->assoc) {
2349                         memcpy(priv->staging_rxon.bssid_addr,
2350                                bss_conf->bssid, ETH_ALEN);
2351
2352                         /* currently needed in a few places */
2353                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2354                 } else {
2355                         priv->staging_rxon.filter_flags &=
2356                                 ~RXON_FILTER_ASSOC_MSK;
2357                 }
2358
2359         }
2360
2361         /*
2362          * This needs to be after setting the BSSID in case
2363          * mac80211 decides to do both changes at once because
2364          * it will invoke post_associate.
2365          */
2366         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2367             changes & BSS_CHANGED_BEACON) {
2368                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2369
2370                 if (beacon)
2371                         iwl_mac_beacon_update(hw, beacon);
2372         }
2373
2374         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2375                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2376                                    bss_conf->use_short_preamble);
2377                 if (bss_conf->use_short_preamble)
2378                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2379                 else
2380                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2381         }
2382
2383         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2384                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2385                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2386                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2387                 else
2388                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2389         }
2390
2391         if (changes & BSS_CHANGED_BASIC_RATES) {
2392                 /* XXX use this information
2393                  *
2394                  * To do that, remove code from iwl_set_rate() and put something
2395                  * like this here:
2396                  *
2397                 if (A-band)
2398                         priv->staging_rxon.ofdm_basic_rates =
2399                                 bss_conf->basic_rates;
2400                 else
2401                         priv->staging_rxon.ofdm_basic_rates =
2402                                 bss_conf->basic_rates >> 4;
2403                         priv->staging_rxon.cck_basic_rates =
2404                                 bss_conf->basic_rates & 0xF;
2405                  */
2406         }
2407
2408         if (changes & BSS_CHANGED_HT) {
2409                 iwl_ht_conf(priv, bss_conf);
2410
2411                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2412                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2413         }
2414
2415         if (changes & BSS_CHANGED_ASSOC) {
2416                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2417                 if (bss_conf->assoc) {
2418                         priv->assoc_id = bss_conf->aid;
2419                         priv->beacon_int = bss_conf->beacon_int;
2420                         priv->timestamp = bss_conf->timestamp;
2421                         priv->assoc_capability = bss_conf->assoc_capability;
2422
2423                         iwl_led_associate(priv);
2424
2425                         /*
2426                          * We have just associated, don't start scan too early
2427                          * leave time for EAPOL exchange to complete.
2428                          *
2429                          * XXX: do this in mac80211
2430                          */
2431                         priv->next_scan_jiffies = jiffies +
2432                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2433                         if (!iwl_is_rfkill(priv))
2434                                 priv->cfg->ops->lib->post_associate(priv);
2435                 } else {
2436                         priv->assoc_id = 0;
2437                         iwl_led_disassociate(priv);
2438                 }
2439         }
2440
2441         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2442                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2443                                    changes);
2444                 ret = iwl_send_rxon_assoc(priv);
2445                 if (!ret) {
2446                         /* Sync active_rxon with latest change. */
2447                         memcpy((void *)&priv->active_rxon,
2448                                 &priv->staging_rxon,
2449                                 sizeof(struct iwl_rxon_cmd));
2450                 }
2451         }
2452
2453         mutex_unlock(&priv->mutex);
2454
2455         IWL_DEBUG_MAC80211(priv, "leave\n");
2456 }
2457 EXPORT_SYMBOL(iwl_bss_info_changed);
2458
2459 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2460 {
2461         struct iwl_priv *priv = hw->priv;
2462         unsigned long flags;
2463         __le64 timestamp;
2464
2465         IWL_DEBUG_MAC80211(priv, "enter\n");
2466
2467         if (!iwl_is_ready_rf(priv)) {
2468                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2469                 return -EIO;
2470         }
2471
2472         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2473                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2474                 return -EIO;
2475         }
2476
2477         spin_lock_irqsave(&priv->lock, flags);
2478
2479         if (priv->ibss_beacon)
2480                 dev_kfree_skb(priv->ibss_beacon);
2481
2482         priv->ibss_beacon = skb;
2483
2484         priv->assoc_id = 0;
2485         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2486         priv->timestamp = le64_to_cpu(timestamp);
2487
2488         IWL_DEBUG_MAC80211(priv, "leave\n");
2489         spin_unlock_irqrestore(&priv->lock, flags);
2490
2491         iwl_reset_qos(priv);
2492
2493         priv->cfg->ops->lib->post_associate(priv);
2494
2495
2496         return 0;
2497 }
2498 EXPORT_SYMBOL(iwl_mac_beacon_update);
2499
2500 int iwl_set_mode(struct iwl_priv *priv, int mode)
2501 {
2502         if (mode == NL80211_IFTYPE_ADHOC) {
2503                 const struct iwl_channel_info *ch_info;
2504
2505                 ch_info = iwl_get_channel_info(priv,
2506                         priv->band,
2507                         le16_to_cpu(priv->staging_rxon.channel));
2508
2509                 if (!ch_info || !is_channel_ibss(ch_info)) {
2510                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2511                                   le16_to_cpu(priv->staging_rxon.channel));
2512                         return -EINVAL;
2513                 }
2514         }
2515
2516         iwl_connection_init_rx_config(priv, mode);
2517
2518         if (priv->cfg->ops->hcmd->set_rxon_chain)
2519                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2520
2521         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2522
2523         iwl_clear_stations_table(priv);
2524
2525         /* dont commit rxon if rf-kill is on*/
2526         if (!iwl_is_ready_rf(priv))
2527                 return -EAGAIN;
2528
2529         iwlcore_commit_rxon(priv);
2530
2531         return 0;
2532 }
2533 EXPORT_SYMBOL(iwl_set_mode);
2534
2535 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2536                                  struct ieee80211_if_init_conf *conf)
2537 {
2538         struct iwl_priv *priv = hw->priv;
2539         unsigned long flags;
2540
2541         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2542
2543         if (priv->vif) {
2544                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2545                 return -EOPNOTSUPP;
2546         }
2547
2548         spin_lock_irqsave(&priv->lock, flags);
2549         priv->vif = conf->vif;
2550         priv->iw_mode = conf->type;
2551
2552         spin_unlock_irqrestore(&priv->lock, flags);
2553
2554         mutex_lock(&priv->mutex);
2555
2556         if (conf->mac_addr) {
2557                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2558                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2559         }
2560
2561         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2562                 /* we are not ready, will run again when ready */
2563                 set_bit(STATUS_MODE_PENDING, &priv->status);
2564
2565         mutex_unlock(&priv->mutex);
2566
2567         IWL_DEBUG_MAC80211(priv, "leave\n");
2568         return 0;
2569 }
2570 EXPORT_SYMBOL(iwl_mac_add_interface);
2571
2572 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2573                                      struct ieee80211_if_init_conf *conf)
2574 {
2575         struct iwl_priv *priv = hw->priv;
2576
2577         IWL_DEBUG_MAC80211(priv, "enter\n");
2578
2579         mutex_lock(&priv->mutex);
2580
2581         if (iwl_is_ready_rf(priv)) {
2582                 iwl_scan_cancel_timeout(priv, 100);
2583                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2584                 iwlcore_commit_rxon(priv);
2585         }
2586         if (priv->vif == conf->vif) {
2587                 priv->vif = NULL;
2588                 memset(priv->bssid, 0, ETH_ALEN);
2589         }
2590         mutex_unlock(&priv->mutex);
2591
2592         IWL_DEBUG_MAC80211(priv, "leave\n");
2593
2594 }
2595 EXPORT_SYMBOL(iwl_mac_remove_interface);
2596
2597 /**
2598  * iwl_mac_config - mac80211 config callback
2599  *
2600  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2601  * be set inappropriately and the driver currently sets the hardware up to
2602  * use it whenever needed.
2603  */
2604 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2605 {
2606         struct iwl_priv *priv = hw->priv;
2607         const struct iwl_channel_info *ch_info;
2608         struct ieee80211_conf *conf = &hw->conf;
2609         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2610         unsigned long flags = 0;
2611         int ret = 0;
2612         u16 ch;
2613         int scan_active = 0;
2614
2615         mutex_lock(&priv->mutex);
2616
2617         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2618                                         conf->channel->hw_value, changed);
2619
2620         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2621                         test_bit(STATUS_SCANNING, &priv->status))) {
2622                 scan_active = 1;
2623                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2624         }
2625
2626
2627         /* during scanning mac80211 will delay channel setting until
2628          * scan finish with changed = 0
2629          */
2630         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2631                 if (scan_active)
2632                         goto set_ch_out;
2633
2634                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2635                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2636                 if (!is_channel_valid(ch_info)) {
2637                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2638                         ret = -EINVAL;
2639                         goto set_ch_out;
2640                 }
2641
2642                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2643                         !is_channel_ibss(ch_info)) {
2644                         IWL_ERR(priv, "channel %d in band %d not "
2645                                 "IBSS channel\n",
2646                                 conf->channel->hw_value, conf->channel->band);
2647                         ret = -EINVAL;
2648                         goto set_ch_out;
2649                 }
2650
2651                 spin_lock_irqsave(&priv->lock, flags);
2652
2653                 /* Configure HT40 channels */
2654                 ht_conf->is_ht = conf_is_ht(conf);
2655                 if (ht_conf->is_ht) {
2656                         if (conf_is_ht40_minus(conf)) {
2657                                 ht_conf->extension_chan_offset =
2658                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2659                                 ht_conf->is_40mhz = true;
2660                         } else if (conf_is_ht40_plus(conf)) {
2661                                 ht_conf->extension_chan_offset =
2662                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2663                                 ht_conf->is_40mhz = true;
2664                         } else {
2665                                 ht_conf->extension_chan_offset =
2666                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2667                                 ht_conf->is_40mhz = false;
2668                         }
2669                 } else
2670                         ht_conf->is_40mhz = false;
2671                 /* Default to no protection. Protection mode will later be set
2672                  * from BSS config in iwl_ht_conf */
2673                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2674
2675                 /* if we are switching from ht to 2.4 clear flags
2676                  * from any ht related info since 2.4 does not
2677                  * support ht */
2678                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2679                         priv->staging_rxon.flags = 0;
2680
2681                 iwl_set_rxon_channel(priv, conf->channel);
2682
2683                 iwl_set_flags_for_band(priv, conf->channel->band);
2684                 spin_unlock_irqrestore(&priv->lock, flags);
2685  set_ch_out:
2686                 /* The list of supported rates and rate mask can be different
2687                  * for each band; since the band may have changed, reset
2688                  * the rate mask to what mac80211 lists */
2689                 iwl_set_rate(priv);
2690         }
2691
2692         if (changed & (IEEE80211_CONF_CHANGE_PS |
2693                         IEEE80211_CONF_CHANGE_IDLE)) {
2694                 ret = iwl_power_update_mode(priv, false);
2695                 if (ret)
2696                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2697         }
2698
2699         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2700                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2701                         priv->tx_power_user_lmt, conf->power_level);
2702
2703                 iwl_set_tx_power(priv, conf->power_level, false);
2704         }
2705
2706         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2707         if (priv->cfg->ops->hcmd->set_rxon_chain)
2708                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2709
2710         if (!iwl_is_ready(priv)) {
2711                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2712                 goto out;
2713         }
2714
2715         if (scan_active)
2716                 goto out;
2717
2718         if (memcmp(&priv->active_rxon,
2719                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2720                 iwlcore_commit_rxon(priv);
2721         else
2722                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2723
2724
2725 out:
2726         IWL_DEBUG_MAC80211(priv, "leave\n");
2727         mutex_unlock(&priv->mutex);
2728         return ret;
2729 }
2730 EXPORT_SYMBOL(iwl_mac_config);
2731
2732 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2733                          struct ieee80211_tx_queue_stats *stats)
2734 {
2735         struct iwl_priv *priv = hw->priv;
2736         int i, avail;
2737         struct iwl_tx_queue *txq;
2738         struct iwl_queue *q;
2739         unsigned long flags;
2740
2741         IWL_DEBUG_MAC80211(priv, "enter\n");
2742
2743         if (!iwl_is_ready_rf(priv)) {
2744                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2745                 return -EIO;
2746         }
2747
2748         spin_lock_irqsave(&priv->lock, flags);
2749
2750         for (i = 0; i < AC_NUM; i++) {
2751                 txq = &priv->txq[i];
2752                 q = &txq->q;
2753                 avail = iwl_queue_space(q);
2754
2755                 stats[i].len = q->n_window - avail;
2756                 stats[i].limit = q->n_window - q->high_mark;
2757                 stats[i].count = q->n_window;
2758
2759         }
2760         spin_unlock_irqrestore(&priv->lock, flags);
2761
2762         IWL_DEBUG_MAC80211(priv, "leave\n");
2763
2764         return 0;
2765 }
2766 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2767
2768 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2769 {
2770         struct iwl_priv *priv = hw->priv;
2771         unsigned long flags;
2772
2773         mutex_lock(&priv->mutex);
2774         IWL_DEBUG_MAC80211(priv, "enter\n");
2775
2776         spin_lock_irqsave(&priv->lock, flags);
2777         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2778         spin_unlock_irqrestore(&priv->lock, flags);
2779
2780         iwl_reset_qos(priv);
2781
2782         spin_lock_irqsave(&priv->lock, flags);
2783         priv->assoc_id = 0;
2784         priv->assoc_capability = 0;
2785         priv->assoc_station_added = 0;
2786
2787         /* new association get rid of ibss beacon skb */
2788         if (priv->ibss_beacon)
2789                 dev_kfree_skb(priv->ibss_beacon);
2790
2791         priv->ibss_beacon = NULL;
2792
2793         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2794         priv->timestamp = 0;
2795         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2796                 priv->beacon_int = 0;
2797
2798         spin_unlock_irqrestore(&priv->lock, flags);
2799
2800         if (!iwl_is_ready_rf(priv)) {
2801                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2802                 mutex_unlock(&priv->mutex);
2803                 return;
2804         }
2805
2806         /* we are restarting association process
2807          * clear RXON_FILTER_ASSOC_MSK bit
2808          */
2809         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2810                 iwl_scan_cancel_timeout(priv, 100);
2811                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2812                 iwlcore_commit_rxon(priv);
2813         }
2814
2815         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2816                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2817                 mutex_unlock(&priv->mutex);
2818                 return;
2819         }
2820
2821         iwl_set_rate(priv);
2822
2823         mutex_unlock(&priv->mutex);
2824
2825         IWL_DEBUG_MAC80211(priv, "leave\n");
2826 }
2827 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2828
2829 #ifdef CONFIG_IWLWIFI_DEBUGFS
2830
2831 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2832
2833 void iwl_reset_traffic_log(struct iwl_priv *priv)
2834 {
2835         priv->tx_traffic_idx = 0;
2836         priv->rx_traffic_idx = 0;
2837         if (priv->tx_traffic)
2838                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2839         if (priv->rx_traffic)
2840                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2841 }
2842
2843 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2844 {
2845         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2846
2847         if (iwl_debug_level & IWL_DL_TX) {
2848                 if (!priv->tx_traffic) {
2849                         priv->tx_traffic =
2850                                 kzalloc(traffic_size, GFP_KERNEL);
2851                         if (!priv->tx_traffic)
2852                                 return -ENOMEM;
2853                 }
2854         }
2855         if (iwl_debug_level & IWL_DL_RX) {
2856                 if (!priv->rx_traffic) {
2857                         priv->rx_traffic =
2858                                 kzalloc(traffic_size, GFP_KERNEL);
2859                         if (!priv->rx_traffic)
2860                                 return -ENOMEM;
2861                 }
2862         }
2863         iwl_reset_traffic_log(priv);
2864         return 0;
2865 }
2866 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2867
2868 void iwl_free_traffic_mem(struct iwl_priv *priv)
2869 {
2870         kfree(priv->tx_traffic);
2871         priv->tx_traffic = NULL;
2872
2873         kfree(priv->rx_traffic);
2874         priv->rx_traffic = NULL;
2875 }
2876 EXPORT_SYMBOL(iwl_free_traffic_mem);
2877
2878 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2879                       u16 length, struct ieee80211_hdr *header)
2880 {
2881         __le16 fc;
2882         u16 len;
2883
2884         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2885                 return;
2886
2887         if (!priv->tx_traffic)
2888                 return;
2889
2890         fc = header->frame_control;
2891         if (ieee80211_is_data(fc)) {
2892                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2893                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2894                 memcpy((priv->tx_traffic +
2895                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2896                        header, len);
2897                 priv->tx_traffic_idx =
2898                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2899         }
2900 }
2901 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2902
2903 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2904                       u16 length, struct ieee80211_hdr *header)
2905 {
2906         __le16 fc;
2907         u16 len;
2908
2909         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2910                 return;
2911
2912         if (!priv->rx_traffic)
2913                 return;
2914
2915         fc = header->frame_control;
2916         if (ieee80211_is_data(fc)) {
2917                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2918                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2919                 memcpy((priv->rx_traffic +
2920                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2921                        header, len);
2922                 priv->rx_traffic_idx =
2923                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2924         }
2925 }
2926 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2927
2928 const char *get_mgmt_string(int cmd)
2929 {
2930         switch (cmd) {
2931                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2932                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2933                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2934                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2935                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2936                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2937                 IWL_CMD(MANAGEMENT_BEACON);
2938                 IWL_CMD(MANAGEMENT_ATIM);
2939                 IWL_CMD(MANAGEMENT_DISASSOC);
2940                 IWL_CMD(MANAGEMENT_AUTH);
2941                 IWL_CMD(MANAGEMENT_DEAUTH);
2942                 IWL_CMD(MANAGEMENT_ACTION);
2943         default:
2944                 return "UNKNOWN";
2945
2946         }
2947 }
2948
2949 const char *get_ctrl_string(int cmd)
2950 {
2951         switch (cmd) {
2952                 IWL_CMD(CONTROL_BACK_REQ);
2953                 IWL_CMD(CONTROL_BACK);
2954                 IWL_CMD(CONTROL_PSPOLL);
2955                 IWL_CMD(CONTROL_RTS);
2956                 IWL_CMD(CONTROL_CTS);
2957                 IWL_CMD(CONTROL_ACK);
2958                 IWL_CMD(CONTROL_CFEND);
2959                 IWL_CMD(CONTROL_CFENDACK);
2960         default:
2961                 return "UNKNOWN";
2962
2963         }
2964 }
2965
2966 void iwl_clear_tx_stats(struct iwl_priv *priv)
2967 {
2968         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2969
2970 }
2971
2972 void iwl_clear_rx_stats(struct iwl_priv *priv)
2973 {
2974         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2975 }
2976
2977 /*
2978  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2979  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2980  * Use debugFs to display the rx/rx_statistics
2981  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2982  * information will be recorded, but DATA pkt still will be recorded
2983  * for the reason of iwl_led.c need to control the led blinking based on
2984  * number of tx and rx data.
2985  *
2986  */
2987 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2988 {
2989         struct traffic_stats    *stats;
2990
2991         if (is_tx)
2992                 stats = &priv->tx_stats;
2993         else
2994                 stats = &priv->rx_stats;
2995
2996         if (ieee80211_is_mgmt(fc)) {
2997                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2998                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2999                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
3000                         break;
3001                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3002                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
3003                         break;
3004                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
3005                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
3006                         break;
3007                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
3008                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
3009                         break;
3010                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
3011                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
3012                         break;
3013                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3014                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
3015                         break;
3016                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3017                         stats->mgmt[MANAGEMENT_BEACON]++;
3018                         break;
3019                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
3020                         stats->mgmt[MANAGEMENT_ATIM]++;
3021                         break;
3022                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
3023                         stats->mgmt[MANAGEMENT_DISASSOC]++;
3024                         break;
3025                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
3026                         stats->mgmt[MANAGEMENT_AUTH]++;
3027                         break;
3028                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3029                         stats->mgmt[MANAGEMENT_DEAUTH]++;
3030                         break;
3031                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
3032                         stats->mgmt[MANAGEMENT_ACTION]++;
3033                         break;
3034                 }
3035         } else if (ieee80211_is_ctl(fc)) {
3036                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3037                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3038                         stats->ctrl[CONTROL_BACK_REQ]++;
3039                         break;
3040                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3041                         stats->ctrl[CONTROL_BACK]++;
3042                         break;
3043                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3044                         stats->ctrl[CONTROL_PSPOLL]++;
3045                         break;
3046                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3047                         stats->ctrl[CONTROL_RTS]++;
3048                         break;
3049                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3050                         stats->ctrl[CONTROL_CTS]++;
3051                         break;
3052                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3053                         stats->ctrl[CONTROL_ACK]++;
3054                         break;
3055                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3056                         stats->ctrl[CONTROL_CFEND]++;
3057                         break;
3058                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3059                         stats->ctrl[CONTROL_CFENDACK]++;
3060                         break;
3061                 }
3062         } else {
3063                 /* data */
3064                 stats->data_cnt++;
3065                 stats->data_bytes += len;
3066         }
3067 }
3068 EXPORT_SYMBOL(iwl_update_stats);
3069 #endif
3070
3071 #ifdef CONFIG_PM
3072
3073 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3074 {
3075         struct iwl_priv *priv = pci_get_drvdata(pdev);
3076
3077         /*
3078          * This function is called when system goes into suspend state
3079          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3080          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3081          * it will not call apm_ops.stop() to stop the DMA operation.
3082          * Calling apm_ops.stop here to make sure we stop the DMA.
3083          */
3084         priv->cfg->ops->lib->apm_ops.stop(priv);
3085
3086         pci_save_state(pdev);
3087         pci_disable_device(pdev);
3088         pci_set_power_state(pdev, PCI_D3hot);
3089
3090         return 0;
3091 }
3092 EXPORT_SYMBOL(iwl_pci_suspend);
3093
3094 int iwl_pci_resume(struct pci_dev *pdev)
3095 {
3096         struct iwl_priv *priv = pci_get_drvdata(pdev);
3097         int ret;
3098
3099         pci_set_power_state(pdev, PCI_D0);
3100         ret = pci_enable_device(pdev);
3101         if (ret)
3102                 return ret;
3103         pci_restore_state(pdev);
3104         iwl_enable_interrupts(priv);
3105
3106         return 0;
3107 }
3108 EXPORT_SYMBOL(iwl_pci_resume);
3109
3110 #endif /* CONFIG_PM */