iwl-core.c 91.3 KB
Newer Older
Tomas Winkler's avatar
Tomas Winkler committed
1
2
3
4
/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
5
 * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
Tomas Winkler's avatar
Tomas Winkler committed
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
25
 *  Intel Linux Wireless <ilw@linux.intel.com>
Tomas Winkler's avatar
Tomas Winkler committed
26
27
28
29
30
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
31
#include <linux/etherdevice.h>
32
#include <net/mac80211.h>
Tomas Winkler's avatar
Tomas Winkler committed
33

34
#include "iwl-eeprom.h"
35
#include "iwl-dev.h" /* FIXME: remove */
36
#include "iwl-debug.h"
Tomas Winkler's avatar
Tomas Winkler committed
37
#include "iwl-core.h"
38
#include "iwl-io.h"
39
#include "iwl-power.h"
40
#include "iwl-sta.h"
Mohamed Abbas's avatar
Mohamed Abbas committed
41
#include "iwl-helpers.h"
Tomas Winkler's avatar
Tomas Winkler committed
42

43

Tomas Winkler's avatar
Tomas Winkler committed
44
45
MODULE_DESCRIPTION("iwl core");
MODULE_VERSION(IWLWIFI_VERSION);
46
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
47
MODULE_LICENSE("GPL");
Tomas Winkler's avatar
Tomas Winkler committed
48

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
	{COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
	 0, COEX_UNASSOC_IDLE_FLAGS},
	{COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
	 0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
	{COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
	 0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
	{COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
	 0, COEX_CALIBRATION_FLAGS},
	{COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
	 0, COEX_PERIODIC_CALIBRATION_FLAGS},
	{COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
	 0, COEX_CONNECTION_ESTAB_FLAGS},
	{COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
	 0, COEX_ASSOCIATED_IDLE_FLAGS},
	{COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
	 0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
	{COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
	 0, COEX_ASSOC_AUTO_SCAN_FLAGS},
	{COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
	 0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
	{COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
	{COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
	{COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
	 0, COEX_STAND_ALONE_DEBUG_FLAGS},
	{COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
	 0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
	{COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
	{COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
};

80
81
82
83
84
85
86
87
88
89
90
91
92
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
	[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
				    IWL_RATE_SISO_##s##M_PLCP, \
				    IWL_RATE_MIMO2_##s##M_PLCP,\
				    IWL_RATE_MIMO3_##s##M_PLCP,\
				    IWL_RATE_##r##M_IEEE,      \
				    IWL_RATE_##ip##M_INDEX,    \
				    IWL_RATE_##in##M_INDEX,    \
				    IWL_RATE_##rp##M_INDEX,    \
				    IWL_RATE_##rn##M_INDEX,    \
				    IWL_RATE_##pp##M_INDEX,    \
				    IWL_RATE_##np##M_INDEX }

93
94
95
u32 iwl_debug_level;
EXPORT_SYMBOL(iwl_debug_level);

Mohamed Abbas's avatar
Mohamed Abbas committed
96
97
static irqreturn_t iwl_isr(int irq, void *data);

98
99
100
101
102
103
104
105
/*
 * Parameter order:
 *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to IWL_RATE_INVALID
 *
 */
106
const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
	IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
	IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
	IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
	IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
	IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
	IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
	IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
	IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
	IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
	IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
	IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
	IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
	IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
	/* FIXME:RS:          ^^    should be INV (legacy) */
};
122
EXPORT_SYMBOL(iwl_rates);
123

124
125
126
127
/**
 * translate ucode response to mac80211 tx status control values
 */
void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
128
				  struct ieee80211_tx_info *info)
129
{
130
	struct ieee80211_tx_rate *r = &info->control.rates[0];
131

132
	info->antenna_sel_tx =
133
134
		((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
	if (rate_n_flags & RATE_MCS_HT_MSK)
135
		r->flags |= IEEE80211_TX_RC_MCS;
136
	if (rate_n_flags & RATE_MCS_GF_MSK)
137
		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
138
	if (rate_n_flags & RATE_MCS_HT40_MSK)
139
		r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
140
	if (rate_n_flags & RATE_MCS_DUP_MSK)
141
		r->flags |= IEEE80211_TX_RC_DUP_DATA;
142
	if (rate_n_flags & RATE_MCS_SGI_MSK)
143
		r->flags |= IEEE80211_TX_RC_SHORT_GI;
144
	r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
145
146
147
148
149
150
151
152
153
154
155
}
EXPORT_SYMBOL(iwl_hwrate_to_tx_control);

int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
{
	int idx = 0;

	/* HT rate format */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);

156
157
158
		if (idx >= IWL_RATE_MIMO3_6M_PLCP)
			idx = idx - IWL_RATE_MIMO3_6M_PLCP;
		else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
			idx = idx - IWL_RATE_MIMO2_6M_PLCP;

		idx += IWL_FIRST_OFDM_RATE;
		/* skip 9M not supported in ht*/
		if (idx >= IWL_RATE_9M_INDEX)
			idx += 1;
		if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
			return idx;

	/* legacy rate format, search for match in table */
	} else {
		for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx;
	}

	return -1;
}
EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);

179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
	int idx = 0;
	int band_offset = 0;

	/* HT rate format: mac80211 wants an MCS number, which is just LSB */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);
		return idx;
	/* Legacy rate format, search for match in table */
	} else {
		if (band == IEEE80211_BAND_5GHZ)
			band_offset = IWL_FIRST_OFDM_RATE;
		for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx - band_offset;
	}

	return -1;
}

200
201
202
203
204
205
206
207
208
209
210
u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
{
	int i;
	u8 ind = ant;
	for (i = 0; i < RATE_ANT_NUM - 1; i++) {
		ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
		if (priv->hw_params.valid_tx_ant & BIT(ind))
			return ind;
	}
	return ant;
}
211
EXPORT_SYMBOL(iwl_toggle_tx_ant);
212
213
214
215
216

const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
EXPORT_SYMBOL(iwl_bcast_addr);


217
218
219
220
221
222
223
224
225
226
227
/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
		struct ieee80211_ops *hw_ops)
{
	struct iwl_priv *priv;

	/* mac80211 allocates memory for this device instance, including
	 *   space for this driver's private structure */
	struct ieee80211_hw *hw =
		ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
	if (hw == NULL) {
228
229
		printk(KERN_ERR "%s: Can not allocate network device\n",
		       cfg->name);
230
231
232
233
234
235
236
237
238
239
240
		goto out;
	}

	priv = hw->priv;
	priv->hw = hw;

out:
	return hw;
}
EXPORT_SYMBOL(iwl_alloc_all);

241
242
243
244
245
246
247
248
void iwl_hw_detect(struct iwl_priv *priv)
{
	priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
	priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
}
EXPORT_SYMBOL(iwl_hw_detect);

249
250
251
252
253
254
255
256
int iwl_hw_nic_init(struct iwl_priv *priv)
{
	unsigned long flags;
	struct iwl_rx_queue *rxq = &priv->rxq;
	int ret;

	/* nic_init */
	spin_lock_irqsave(&priv->lock, flags);
257
	priv->cfg->ops->lib->apm_ops.init(priv);
258
259
260
261

	/* Set interrupt coalescing timer to 512 usecs */
	iwl_write8(priv, CSR_INT_COALESCING, 512 / 32);

262
263
264
265
266
267
268
269
270
271
	spin_unlock_irqrestore(&priv->lock, flags);

	ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);

	priv->cfg->ops->lib->apm_ops.config(priv);

	/* Allocate the RX queue, or reset if it is already allocated */
	if (!rxq->bd) {
		ret = iwl_rx_queue_alloc(priv);
		if (ret) {
272
			IWL_ERR(priv, "Unable to initialize Rx queue\n");
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
			return -ENOMEM;
		}
	} else
		iwl_rx_queue_reset(priv, rxq);

	iwl_rx_replenish(priv);

	iwl_rx_init(priv, rxq);

	spin_lock_irqsave(&priv->lock, flags);

	rxq->need_update = 1;
	iwl_rx_queue_update_write_ptr(priv, rxq);

	spin_unlock_irqrestore(&priv->lock, flags);

	/* Allocate and init all Tx and Command queues */
	ret = iwl_txq_ctx_reset(priv);
	if (ret)
		return ret;

	set_bit(STATUS_INIT, &priv->status);

	return 0;
}
EXPORT_SYMBOL(iwl_hw_nic_init);

300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/*
 * QoS  support
*/
void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	priv->qos_data.def_qos_parm.qos_flags = 0;

	if (priv->qos_data.qos_cap.q_AP.queue_request &&
	    !priv->qos_data.qos_cap.q_AP.txop_request)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_TXOP_TYPE_MSK;
	if (priv->qos_data.qos_active)
		priv->qos_data.def_qos_parm.qos_flags |=
			QOS_PARAM_FLG_UPDATE_EDCA_MSK;

	if (priv->current_ht_config.is_ht)
		priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;

	if (force || iwl_is_associated(priv)) {
		IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
				priv->qos_data.qos_active,
				priv->qos_data.def_qos_parm.qos_flags);

		iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
				       sizeof(struct iwl_qosparam_cmd),
				       &priv->qos_data.def_qos_parm, NULL);
	}
}
EXPORT_SYMBOL(iwl_activate_qos);

333
334
335
336
337
338
339
340
/*
 * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 *                                              (802.11b)      (802.11a/g)
 * AC_BK      15            1023        7           0               0
 * AC_BE      15            1023        3           0               0
 * AC_VI       7              15        2          6.016ms       3.008ms
 * AC_VO       3               7        2          3.264ms       1.504ms
 */
341
void iwl_reset_qos(struct iwl_priv *priv)
342
343
344
345
{
	u16 cw_min = 15;
	u16 cw_max = 1023;
	u8 aifs = 2;
346
	bool is_legacy = false;
347
348
349
350
	unsigned long flags;
	int i;

	spin_lock_irqsave(&priv->lock, flags);
351
352
353
354
355
356
357
358
	/* QoS always active in AP and ADHOC mode
	 * In STA mode wait for association
	 */
	if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
	    priv->iw_mode == NL80211_IFTYPE_AP)
		priv->qos_data.qos_active = 1;
	else
		priv->qos_data.qos_active = 0;
359

360
361
362
363
364
	/* check for legacy mode */
	if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
	    (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
	    (priv->iw_mode == NL80211_IFTYPE_STATION &&
	    (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
365
366
367
368
369
370
371
		cw_min = 31;
		is_legacy = 1;
	}

	if (priv->qos_data.qos_active)
		aifs = 3;

372
	/* AC_BE */
373
374
375
376
377
378
379
	priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
	priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
	priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
	priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
	priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;

	if (priv->qos_data.qos_active) {
380
		/* AC_BK */
381
382
383
384
385
386
387
		i = 1;
		priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
		priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
		priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
		priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

388
		/* AC_VI */
389
390
391
392
		i = 2;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 2 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
393
			cpu_to_le16(cw_min);
394
395
396
397
398
399
400
401
402
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(6016);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3008);
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;

403
		/* AC_VO */
404
405
406
407
		i = 3;
		priv->qos_data.def_qos_parm.ac[i].cw_min =
			cpu_to_le16((cw_min + 1) / 4 - 1);
		priv->qos_data.def_qos_parm.ac[i].cw_max =
408
			cpu_to_le16((cw_min + 1) / 2 - 1);
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
		priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
		priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		if (is_legacy)
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(3264);
		else
			priv->qos_data.def_qos_parm.ac[i].edca_txop =
				cpu_to_le16(1504);
	} else {
		for (i = 1; i < 4; i++) {
			priv->qos_data.def_qos_parm.ac[i].cw_min =
				cpu_to_le16(cw_min);
			priv->qos_data.def_qos_parm.ac[i].cw_max =
				cpu_to_le16(cw_max);
			priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
			priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
			priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
		}
	}
428
	IWL_DEBUG_QOS(priv, "set QoS to default \n");
429
430
431

	spin_unlock_irqrestore(&priv->lock, flags);
}
432
433
EXPORT_SYMBOL(iwl_reset_qos);

434
435
#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
436
static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
437
			      struct ieee80211_sta_ht_cap *ht_info,
438
439
			      enum ieee80211_band band)
{
Ron Rindjunsky's avatar
Ron Rindjunsky committed
440
441
442
443
	u16 max_bit_rate = 0;
	u8 rx_chains_num = priv->hw_params.rx_chains_num;
	u8 tx_chains_num = priv->hw_params.tx_chains_num;

444
	ht_info->cap = 0;
445
	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
446

447
	ht_info->ht_supported = true;
448

449
450
	if (priv->cfg->ht_greenfield_support)
		ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
451
	ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
452
453
	ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
			     (priv->cfg->sm_ps_mode << 2));
Ron Rindjunsky's avatar
Ron Rindjunsky committed
454
	max_bit_rate = MAX_BIT_RATE_20_MHZ;
455
	if (priv->hw_params.ht40_channel & BIT(band)) {
456
457
458
		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
		ht_info->mcs.rx_mask[4] = 0x01;
Ron Rindjunsky's avatar
Ron Rindjunsky committed
459
		max_bit_rate = MAX_BIT_RATE_40_MHZ;
460
461
462
	}

	if (priv->cfg->mod_params->amsdu_size_8K)
463
		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
464
465
466
467

	ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
	ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;

468
	ht_info->mcs.rx_mask[0] = 0xFF;
Ron Rindjunsky's avatar
Ron Rindjunsky committed
469
	if (rx_chains_num >= 2)
470
		ht_info->mcs.rx_mask[1] = 0xFF;
Ron Rindjunsky's avatar
Ron Rindjunsky committed
471
	if (rx_chains_num >= 3)
472
		ht_info->mcs.rx_mask[2] = 0xFF;
Ron Rindjunsky's avatar
Ron Rindjunsky committed
473
474
475

	/* Highest supported Rx data rate */
	max_bit_rate *= rx_chains_num;
476
477
	WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
	ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
Ron Rindjunsky's avatar
Ron Rindjunsky committed
478
479

	/* Tx MCS capabilities */
480
	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
Ron Rindjunsky's avatar
Ron Rindjunsky committed
481
	if (tx_chains_num != rx_chains_num) {
482
483
484
		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
		ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
Ron Rindjunsky's avatar
Ron Rindjunsky committed
485
	}
486
487
488
489
490
}

/**
 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
491
int iwlcore_init_geos(struct iwl_priv *priv)
492
493
494
495
496
497
498
499
500
501
{
	struct iwl_channel_info *ch;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *channels;
	struct ieee80211_channel *geo_ch;
	struct ieee80211_rate *rates;
	int i = 0;

	if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
	    priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
502
		IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
503
504
505
506
507
508
509
510
511
		set_bit(STATUS_GEO_CONFIGURED, &priv->status);
		return 0;
	}

	channels = kzalloc(sizeof(struct ieee80211_channel) *
			   priv->channel_count, GFP_KERNEL);
	if (!channels)
		return -ENOMEM;

512
	rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
513
514
515
516
517
518
519
520
521
522
523
			GFP_KERNEL);
	if (!rates) {
		kfree(channels);
		return -ENOMEM;
	}

	/* 5.2GHz channels start after the 2.4GHz channels */
	sband = &priv->bands[IEEE80211_BAND_5GHZ];
	sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
	/* just OFDM */
	sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
524
	sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
525

526
	if (priv->cfg->sku & IWL_SKU_N)
527
		iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
528
					 IEEE80211_BAND_5GHZ);
529
530
531
532
533

	sband = &priv->bands[IEEE80211_BAND_2GHZ];
	sband->channels = channels;
	/* OFDM & CCK */
	sband->bitrates = rates;
534
	sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
535

536
	if (priv->cfg->sku & IWL_SKU_N)
537
		iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
538
					 IEEE80211_BAND_2GHZ);
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572

	priv->ieee_channels = channels;
	priv->ieee_rates = rates;

	for (i = 0;  i < priv->channel_count; i++) {
		ch = &priv->channel_info[i];

		/* FIXME: might be removed if scan is OK */
		if (!is_channel_valid(ch))
			continue;

		if (is_channel_a_band(ch))
			sband =  &priv->bands[IEEE80211_BAND_5GHZ];
		else
			sband =  &priv->bands[IEEE80211_BAND_2GHZ];

		geo_ch = &sband->channels[sband->n_channels++];

		geo_ch->center_freq =
				ieee80211_channel_to_frequency(ch->channel);
		geo_ch->max_power = ch->max_power_avg;
		geo_ch->max_antenna_gain = 0xff;
		geo_ch->hw_value = ch->channel;

		if (is_channel_valid(ch)) {
			if (!(ch->flags & EEPROM_CHANNEL_IBSS))
				geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;

			if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
				geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;

			if (ch->flags & EEPROM_CHANNEL_RADAR)
				geo_ch->flags |= IEEE80211_CHAN_RADAR;

573
			geo_ch->flags |= ch->ht40_extension_channel;
574

575
576
			if (ch->max_power_avg > priv->tx_power_device_lmt)
				priv->tx_power_device_lmt = ch->max_power_avg;
577
578
579
580
		} else {
			geo_ch->flags |= IEEE80211_CHAN_DISABLED;
		}

581
		IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
582
583
584
585
586
587
588
589
590
				ch->channel, geo_ch->center_freq,
				is_channel_a_band(ch) ?  "5.2" : "2.4",
				geo_ch->flags & IEEE80211_CHAN_DISABLED ?
				"restricted" : "valid",
				 geo_ch->flags);
	}

	if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
	     priv->cfg->sku & IWL_SKU_A) {
Tomas Winkler's avatar
Tomas Winkler committed
591
592
		IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
			"Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
593
594
			   priv->pci_dev->device,
			   priv->pci_dev->subsystem_device);
595
596
597
		priv->cfg->sku &= ~IWL_SKU_A;
	}

Tomas Winkler's avatar
Tomas Winkler committed
598
	IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
599
600
		   priv->bands[IEEE80211_BAND_2GHZ].n_channels,
		   priv->bands[IEEE80211_BAND_5GHZ].n_channels);
601
602
603
604
605

	set_bit(STATUS_GEO_CONFIGURED, &priv->status);

	return 0;
}
606
EXPORT_SYMBOL(iwlcore_init_geos);
607
608
609
610

/*
 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 */
611
void iwlcore_free_geos(struct iwl_priv *priv)
612
613
614
615
616
{
	kfree(priv->ieee_channels);
	kfree(priv->ieee_rates);
	clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
617
EXPORT_SYMBOL(iwlcore_free_geos);
618

619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
/*
 *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 *  function.
 */
void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
				__le32 *tx_flags)
{
	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
		*tx_flags |= TX_CMD_FLG_RTS_MSK;
		*tx_flags &= ~TX_CMD_FLG_CTS_MSK;
	} else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
		*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
		*tx_flags |= TX_CMD_FLG_CTS_MSK;
	}
}
EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);

636
static bool is_single_rx_stream(struct iwl_priv *priv)
637
638
{
	return !priv->current_ht_config.is_ht ||
639
	       priv->current_ht_config.single_chain_sufficient;
640
}
641

642
643
644
645
646
647
648
649
650
651
static u8 iwl_is_channel_extension(struct iwl_priv *priv,
				   enum ieee80211_band band,
				   u16 channel, u8 extension_chan_offset)
{
	const struct iwl_channel_info *ch_info;

	ch_info = iwl_get_channel_info(priv, band, channel);
	if (!is_channel_valid(ch_info))
		return 0;

652
	if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
653
		return !(ch_info->ht40_extension_channel &
654
					IEEE80211_CHAN_NO_HT40PLUS);
655
	else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
656
		return !(ch_info->ht40_extension_channel &
657
					IEEE80211_CHAN_NO_HT40MINUS);
658
659
660
661

	return 0;
}

662
u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
663
			 struct ieee80211_sta_ht_cap *sta_ht_inf)
664
{
665
	struct iwl_ht_config *ht_conf = &priv->current_ht_config;
666

667
	if (!ht_conf->is_ht || !ht_conf->is_40mhz)
668
669
		return 0;

670
671
672
	/* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
	 * the bit will not set if it is pure 40MHz case
	 */
673
	if (sta_ht_inf) {
674
		if (!sta_ht_inf->ht_supported)
675
676
			return 0;
	}
677
678
679
680
#ifdef CONFIG_IWLWIFI_DEBUG
	if (priv->disable_ht40)
		return 0;
#endif
681
682
	return iwl_is_channel_extension(priv, priv->band,
			le16_to_cpu(priv->staging_rxon.channel),
683
			ht_conf->extension_chan_offset);
684
}
685
EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
686

687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
{
	u16 new_val = 0;
	u16 beacon_factor = 0;

	beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
	new_val = beacon_val / beacon_factor;

	if (!new_val)
		new_val = max_beacon_val;

	return new_val;
}

void iwl_setup_rxon_timing(struct iwl_priv *priv)
{
	u64 tsf;
	s32 interval_tm, rem;
	unsigned long flags;
	struct ieee80211_conf *conf = NULL;
	u16 beacon_int;

	conf = ieee80211_get_hw_conf(priv->hw);

	spin_lock_irqsave(&priv->lock, flags);
	priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
	priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);

	if (priv->iw_mode == NL80211_IFTYPE_STATION) {
		beacon_int = priv->beacon_int;
		priv->rxon_timing.atim_window = 0;
	} else {
		beacon_int = priv->vif->bss_conf.beacon_int;

		/* TODO: we need to get atim_window from upper stack
		 * for now we set to 0 */
		priv->rxon_timing.atim_window = 0;
	}

	beacon_int = iwl_adjust_beacon_interval(beacon_int,
				priv->hw_params.max_beacon_itrvl * 1024);
	priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);

	tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
	interval_tm = beacon_int * 1024;
	rem = do_div(tsf, interval_tm);
	priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);

	spin_unlock_irqrestore(&priv->lock, flags);
	IWL_DEBUG_ASSOC(priv,
			"beacon interval %d beacon timer %d beacon tim %d\n",
			le16_to_cpu(priv->rxon_timing.beacon_interval),
			le32_to_cpu(priv->rxon_timing.beacon_init_val),
			le16_to_cpu(priv->rxon_timing.atim_window));
}
EXPORT_SYMBOL(iwl_setup_rxon_timing);

744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

	if (hw_decrypt)
		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
	else
		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

}
EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);

/**
 * iwl_check_rxon_cmd - validate RXON structure is valid
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
int iwl_check_rxon_cmd(struct iwl_priv *priv)
{
	int error = 0;
	int counter = 1;
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
		error |= le32_to_cpu(rxon->flags &
				(RXON_FLG_TGJ_NARROW_BAND_MSK |
				 RXON_FLG_RADAR_DETECT_MSK));
		if (error)
			IWL_WARN(priv, "check 24G fields %d | %d\n",
				    counter++, error);
	} else {
		error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
				0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
		if (error)
			IWL_WARN(priv, "check 52 fields %d | %d\n",
				    counter++, error);
		error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
		if (error)
			IWL_WARN(priv, "check 52 CCK %d | %d\n",
				    counter++, error);
	}
	error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
	if (error)
		IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);

	/* make sure basic rates 6Mbps and 1Mbps are supported */
	error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
		  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
	if (error)
		IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);

	error |= (le16_to_cpu(rxon->assoc_id) > 2007);
	if (error)
		IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
	if (error)
		IWL_WARN(priv, "check CCK and short slot %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
	if (error)
		IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
			    counter++, error);

	error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
			RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
	if (error)
		IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
			    counter++, error);

	if (error)
		IWL_WARN(priv, "Tuning to channel %d\n",
			    le16_to_cpu(rxon->channel));

	if (error) {
		IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
		return -1;
	}
	return 0;
}
EXPORT_SYMBOL(iwl_check_rxon_cmd);

/**
 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 * @priv: staging_rxon is compared to active_rxon
 *
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 */
int iwl_full_rxon_required(struct iwl_priv *priv)
{

	/* These items are only settable from the full RXON command */
	if (!(iwl_is_associated(priv)) ||
	    compare_ether_addr(priv->staging_rxon.bssid_addr,
			       priv->active_rxon.bssid_addr) ||
	    compare_ether_addr(priv->staging_rxon.node_addr,
			       priv->active_rxon.node_addr) ||
	    compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
			       priv->active_rxon.wlap_bssid_addr) ||
	    (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
	    (priv->staging_rxon.channel != priv->active_rxon.channel) ||
	    (priv->staging_rxon.air_propagation !=
	     priv->active_rxon.air_propagation) ||
	    (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
	    (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
858
859
	    (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
	     priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
	    (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
		return 1;

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
	    (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
		return 1;

	/* Check if we are switching association toggle */
	if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
		(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
		return 1;

	return 0;
}
EXPORT_SYMBOL(iwl_full_rxon_required);

u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
{
	int i;
	int rate_mask;

	/* Set rate mask*/
	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
		rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
	else
		rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;

	/* Find lowest valid rate */
	for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
					i = iwl_rates[i].next_ieee) {
		if (rate_mask & (1 << i))
			return iwl_rates[i].plcp;
	}

	/* No valid rate was found. Assign the lowest one */
	if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
		return IWL_RATE_1M_PLCP;
	else
		return IWL_RATE_6M_PLCP;
}
EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);

907
void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
908
{
Gregory Greenman's avatar
Gregory Greenman committed
909
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
910

911
	if (!ht_conf->is_ht) {
912
		rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
913
			RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
914
			RXON_FLG_HT40_PROT_MSK |
915
			RXON_FLG_HT_PROT_MSK);
916
		return;
917
	}
918

919
920
921
	/* FIXME: if the definition of ht_protection changed, the "translation"
	 * will be needed for rxon->flags
	 */
922
	rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
923
924

	/* Set up channel bandwidth:
925
	 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
926
927
928
	/* clear the HT channel mode before set the mode */
	rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
			 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
929
930
	if (iwl_is_ht40_tx_allowed(priv, NULL)) {
		/* pure ht40 */
931
		if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
932
			rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
933
			/* Note: control channel is opposite of extension channel */
934
			switch (ht_conf->extension_chan_offset) {
935
936
937
938
939
940
941
942
			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
				rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				break;
			}
		} else {
943
			/* Note: control channel is opposite of extension channel */
944
			switch (ht_conf->extension_chan_offset) {
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
				rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_NONE:
			default:
				/* channel location only valid if in Mixed mode */
				IWL_ERR(priv, "invalid extension channel offset\n");
				break;
			}
		}
	} else {
		rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
962
963
	}

964
965
	if (priv->cfg->ops->hcmd->set_rxon_chain)
		priv->cfg->ops->hcmd->set_rxon_chain(priv);
966

967
	IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
Johannes Berg's avatar
Johannes Berg committed
968
			"extension channel offset 0x%x\n",
969
970
			le32_to_cpu(rxon->flags), ht_conf->ht_protection,
			ht_conf->extension_chan_offset);
971
972
973
974
	return;
}
EXPORT_SYMBOL(iwl_set_rxon_ht);

975
976
977
978
979
#define IWL_NUM_RX_CHAINS_MULTIPLE	3
#define IWL_NUM_RX_CHAINS_SINGLE	2
#define IWL_NUM_IDLE_CHAINS_DUAL	2
#define IWL_NUM_IDLE_CHAINS_SINGLE	1

980
981
982
983
984
985
986
/*
 * Determine how many receiver/antenna chains to use.
 *
 * More provides better reception via diversity.  Fewer saves power
 * at the expense of throughput, but only when not in powersave to
 * start with.
 *
987
988
989
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
990
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
991
992
{
	/* # of Rx chains to use when expecting MIMO. */
993
	if (is_single_rx_stream(priv))
994
		return IWL_NUM_RX_CHAINS_SINGLE;
995
	else
996
		return IWL_NUM_RX_CHAINS_MULTIPLE;
997
}
998

999
/*
1000
1001
 * When we are in power saving mode, unless device support spatial
 * multiplexing power save, use the active count for rx chain count.
1002
 */
1003
1004
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
1005
1006
1007
	int idle_cnt = active_cnt;
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);

1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
	/* # Rx chains when idling and maybe trying to save power */
	switch (priv->cfg->sm_ps_mode) {
	case WLAN_HT_CAP_SM_PS_STATIC:
		idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
		break;
	case WLAN_HT_CAP_SM_PS_DYNAMIC:
		idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
			IWL_NUM_IDLE_CHAINS_SINGLE;
		break;
	case WLAN_HT_CAP_SM_PS_DISABLED:
		break;
	case WLAN_HT_CAP_SM_PS_INVALID:
	default:
		IWL_ERR(priv, "invalid sm_ps mode %u\n",
			priv->cfg->sm_ps_mode);
		WARN_ON(1);
		break;
1025
1026
	}
	return idle_cnt;
1027
1028
}

1029
1030
1031
1032
1033
1034
1035
/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
	u8 res;
	res = (chain_bitmap & BIT(0)) >> 0;
	res += (chain_bitmap & BIT(1)) >> 1;
	res += (chain_bitmap & BIT(2)) >> 2;
Johannes Berg's avatar
Johannes Berg committed
1036
	res += (chain_bitmap & BIT(3)) >> 3;
1037
1038
1039
	return res;
}

1040
1041
1042
1043
1044
1045
1046
/**
 * iwl_is_monitor_mode - Determine if interface in monitor mode
 *
 * priv->iw_mode is set in add_interface, but add_interface is
 * never called for monitor mode. The only way mac80211 informs us about
 * monitor mode is through configuring filters (call to configure_filter).
 */
1047
bool iwl_is_monitor_mode(struct iwl_priv *priv)
1048
1049
1050
{
	return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
}
1051
EXPORT_SYMBOL(iwl_is_monitor_mode);
1052

1053
1054
1055
1056
1057
1058
1059
1060
/**
 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 *
 * Selects how many and which Rx receivers/antennas/chains to use.
 * This should not be used for scan command ... it puts data in wrong place.
 */
void iwl_set_rxon_chain(struct iwl_priv *priv)
{
1061
1062
	bool is_single = is_single_rx_stream(priv);
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1063
1064
	u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
	u32 active_chains;
1065
	u16 rx_chain;
1066
1067
1068
1069
1070

	/* Tell uCode which antennas are actually connected.
	 * Before first association, we assume all antennas are connected.
	 * Just after first association, iwl_chain_noise_calibration()
	 *    checks which antennas actually *are* connected. */
1071
1072
1073
1074
1075
1076
	 if (priv->chain_noise_data.active_chains)
		active_chains = priv->chain_noise_data.active_chains;
	else
		active_chains = priv->hw_params.valid_rx_ant;

	rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1077
1078

	/* How many receivers should we use? */
1079
1080
1081
1082
	active_rx_cnt = iwl_get_active_rx_chain_count(priv);
	idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


1083
1084
1085
1086
1087
1088
1089
1090
1091
	/* correct rx chain count according hw settings
	 * and chain noise calibration
	 */
	valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
	if (valid_rx_cnt < active_rx_cnt)
		active_rx_cnt = valid_rx_cnt;

	if (valid_rx_cnt < idle_rx_cnt)
		idle_rx_cnt = valid_rx_cnt;
1092
1093
1094
1095

	rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
	rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

1096
1097
1098
1099
1100
1101
1102
	/* copied from 'iwl_bg_request_scan()' */
	/* Force use of chains B and C (0x6) for Rx for 4965
	 * Avoid A (0x1) because of its off-channel reception on A-band.
	 * MIMO is not used here, but value is required */
	if (iwl_is_monitor_mode(priv) &&
	    !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
	    ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1103
1104
1105
1106
		rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
		rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
		rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
		rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1107
1108
	}

1109
1110
	priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);

1111
	if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1112
1113
1114
1115
		priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
	else
		priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

1116
	IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1117
1118
1119
1120
1121
			priv->staging_rxon.rx_chain,
			active_rx_cnt, idle_rx_cnt);

	WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
		active_rx_cnt < idle_rx_cnt);
1122
1123
}
EXPORT_SYMBOL(iwl_set_rxon_chain);
1124
1125

/**
1126
 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1127
1128
1129
1130
1131
1132
1133
1134
 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 * @channel: Any channel valid for the requested phymode

 * In addition to setting the staging RXON, priv->phymode is also set.
 *
 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the phymode
 */
1135
int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1136
{
1137
1138
1139
	enum ieee80211_band band = ch->band;
	u16 channel = ieee80211_frequency_to_channel(ch->center_freq);

1140
	if (!iwl_get_channel_info(priv, band, channel)) {
1141
		IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
			       channel, band);
		return -EINVAL;
	}

	if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
	    (priv->band == band))
		return 0;

	priv->staging_rxon.channel = cpu_to_le16(channel);
	if (band == IEEE80211_BAND_5GHZ)
		priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;

	priv->band = band;

1158
	IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1159
1160
1161

	return 0;
}
1162
EXPORT_SYMBOL(iwl_set_rxon_channel);
1163

1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
void iwl_set_flags_for_band(struct iwl_priv *priv,
			    enum ieee80211_band band)
{
	if (band == IEEE80211_BAND_5GHZ) {
		priv->staging_rxon.flags &=
		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
		      | RXON_FLG_CCK_MSK);
		priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
	} else {
		/* Copied from iwl_post_associate() */
		if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
			priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
			priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
		priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
		priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
	}
}

/*
 * initialize rxon structure with default values from eeprom
 */
void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
{
	const struct iwl_channel_info *ch_info;

	memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

	switch (mode) {
	case NL80211_IFTYPE_AP:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
		break;

	case NL80211_IFTYPE_STATION:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
		priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case NL80211_IFTYPE_ADHOC:
		priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
		priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
		priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
						  RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	default:
		IWL_ERR(priv, "Unsupported interface type %d\n", mode);
		break;
	}

#if 0
	/* TODO:  Figure out when short_preamble would be set and cache from
	 * that */
	if (!hw_to_local(priv->hw)->short_preamble)
		priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

	ch_info = iwl_get_channel_info(priv, priv->band,
				       le16_to_cpu(priv->active_rxon.channel));

	if (!ch_info)
		ch_info = &priv->channel_info[0];

	/*
	 * in some case A channels are all non IBSS
	 * in this case force B/G channel
	 */
	if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
	    !(is_channel_ibss(ch_info)))
		ch_info = &priv->channel_info[0];

	priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
	priv->band = ch_info->band;

	iwl_set_flags_for_band(priv, priv->band);

	priv->staging_rxon.ofdm_basic_rates =
	    (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	priv->staging_rxon.cck_basic_rates =
	    (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

1252
1253
1254
	/* clear both MIX and PURE40 mode flag */
	priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
					RXON_FLG_CHANNEL_MODE_PURE_40);
1255
1256
1257
1258
	memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
	memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
	priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
	priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1259
	priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1260
1261
1262
}
EXPORT_SYMBOL(iwl_connection_init_rx_config);

1263
static void iwl_set_rate(struct iwl_priv *priv)
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
{
	const struct ieee80211_supported_band *hw = NULL;
	struct ieee80211_rate *rate;
	int i;

	hw = iwl_get_hw_mode(priv, priv->band);
	if (!hw) {
		IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
		return;
	}

	priv->active_rate = 0;
	priv->active_rate_basic = 0;

	for (i = 0; i < hw->n_bitrates; i++) {
		rate = &(hw->bitrates[i]);
1280
		if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1281
1282
1283
			priv->active_rate |= (1 << rate->hw_value);
	}

1284
	IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
		       priv->active_rate, priv->active_rate_basic);

	/*
	 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
	 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
	 * OFDM
	 */
	if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
		priv->staging_rxon.cck_basic_rates =
		    ((priv->active_rate_basic &
		      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
	else
		priv->staging_rxon.cck_basic_rates =
		    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

	if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
		priv->staging_rxon.ofdm_basic_rates =
		    ((priv->active_rate_basic &
		      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
		      IWL_FIRST_OFDM_RATE) & 0xFF;
	else
		priv->staging_rxon.ofdm_basic_rates =
		   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
Zhu Yi's avatar
Zhu Yi committed
1312
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1313
1314
	struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
	struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1315

Wey-Yi Guy's avatar
Wey-Yi Guy committed
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
	if (priv->switch_rxon.switch_in_progress) {
		if (!le32_to_cpu(csa->status) &&
		    (csa->channel == priv->switch_rxon.channel)) {
			rxon->channel = csa->channel;
			priv->staging_rxon.channel = csa->channel;
			IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
			      le16_to_cpu(csa->channel));
		} else
			IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
			      le16_to_cpu(csa->channel));

		priv->switch_rxon.switch_in_progress = false;
	}
1329
1330
1331
1332
}
EXPORT_SYMBOL(iwl_rx_csa);

#ifdef CONFIG_IWLWIFI_DEBUG
1333
void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1334
1335
1336
{
	struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

1337
	IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1338
	iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1339
1340
1341
	IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
	IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
	IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1342
			le32_to_cpu(rxon->filter_flags));
1343
1344
	IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
	IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1345
			rxon->ofdm_basic_rates);
1346
1347
1348
1349
	IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
	IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
	IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
	IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1350
}
1351
EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1352
#endif
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
/**
 * iwl_irq_handle_error - called for HW or SW error interrupt from card
 */
void iwl_irq_handle_error(struct iwl_priv *priv)
{
	/* Set the FW error flag -- cleared on iwl_down */
	set_bit(STATUS_FW_ERROR, &priv->status);

	/* Cancel currently queued command. */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

#ifdef CONFIG_IWLWIFI_DEBUG
1365
	if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1366
1367
		priv->cfg->ops->lib->dump_nic_error_log(priv);
		priv->cfg->ops->lib->dump_nic_event_log(priv);
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
		iwl_print_rx_config_cmd(priv);
	}
#endif

	wake_up_interruptible(&priv->wait_command_queue);

	/* Keep the restart process from trying to send host
	 * commands by clearing the INIT status bit */
	clear_bit(STATUS_READY, &priv->status);

	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1379
		IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1380
1381
1382
1383
1384
1385
1386
1387
			  "Restarting adapter due to uCode error.\n");

		if (priv->cfg->mod_params->restart_fw)
			queue_work(priv->workqueue, &priv->restart);
	}
}
EXPORT_SYMBOL(iwl_irq_handle_error);

1388
1389
int iwl_apm_stop_master(struct iwl_priv *priv)
{
1390
	int ret = 0;
1391

1392
	/* stop device's busmaster DMA activity */
1393
1394
	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);

1395
	ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1396
			CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1397
1398
	if (ret)
		IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1399
1400
1401

	IWL_DEBUG_INFO(priv, "stop master\n");

1402
	return ret;
1403
1404
1405
1406
1407
}
EXPORT_SYMBOL(iwl_apm_stop_master);

void iwl_apm_stop(struct iwl_priv *priv)
{
1408
1409
	IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");

1410
	/* Stop device's DMA activity */
1411
1412
	iwl_apm_stop_master(priv);

1413
	/* Reset the entire device */