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drivers/net/wireless: Storage class should be before const qualifier
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob682342cf639406045f999c5c49826d2036ccfa30
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h" /* FIXME: remove */
38 #include "iwl-debug.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41 #include "iwl-power.h"
42 #include "iwl-sta.h"
43 #include "iwl-helpers.h"
44
45
46 MODULE_DESCRIPTION("iwl core");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
50
51 /*
52 * set bt_coex_active to true, uCode will do kill/defer
53 * every time the priority line is asserted (BT is sending signals on the
54 * priority line in the PCIx).
55 * set bt_coex_active to false, uCode will ignore the BT activity and
56 * perform the normal operation
57 *
58 * User might experience transmit issue on some platform due to WiFi/BT
59 * co-exist problem. The possible behaviors are:
60 * Able to scan and finding all the available AP
61 * Not able to associate with any AP
62 * On those platforms, WiFi communication can be restored by set
63 * "bt_coex_active" module parameter to "false"
64 *
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
66 */
67 static bool bt_coex_active = true;
68 module_param(bt_coex_active, bool, S_IRUGO);
69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
70
71 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
72 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
73 IWL_RATE_SISO_##s##M_PLCP, \
74 IWL_RATE_MIMO2_##s##M_PLCP,\
75 IWL_RATE_MIMO3_##s##M_PLCP,\
76 IWL_RATE_##r##M_IEEE, \
77 IWL_RATE_##ip##M_INDEX, \
78 IWL_RATE_##in##M_INDEX, \
79 IWL_RATE_##rp##M_INDEX, \
80 IWL_RATE_##rn##M_INDEX, \
81 IWL_RATE_##pp##M_INDEX, \
82 IWL_RATE_##np##M_INDEX }
83
84 u32 iwl_debug_level;
85 EXPORT_SYMBOL(iwl_debug_level);
86
87 /*
88 * Parameter order:
89 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
90 *
91 * If there isn't a valid next or previous rate then INV is used which
92 * maps to IWL_RATE_INVALID
93 *
94 */
95 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
96 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
97 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
98 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
99 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
100 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
101 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
102 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
103 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
104 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
105 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
106 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
107 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
108 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
109 /* FIXME:RS: ^^ should be INV (legacy) */
110 };
111 EXPORT_SYMBOL(iwl_rates);
112
113 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
114 {
115 int idx = 0;
116
117 /* HT rate format */
118 if (rate_n_flags & RATE_MCS_HT_MSK) {
119 idx = (rate_n_flags & 0xff);
120
121 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
122 idx = idx - IWL_RATE_MIMO3_6M_PLCP;
123 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
124 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
125
126 idx += IWL_FIRST_OFDM_RATE;
127 /* skip 9M not supported in ht*/
128 if (idx >= IWL_RATE_9M_INDEX)
129 idx += 1;
130 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
131 return idx;
132
133 /* legacy rate format, search for match in table */
134 } else {
135 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
136 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
137 return idx;
138 }
139
140 return -1;
141 }
142 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
143
144 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
145 {
146 int i;
147 u8 ind = ant;
148 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
149 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
150 if (priv->hw_params.valid_tx_ant & BIT(ind))
151 return ind;
152 }
153 return ant;
154 }
155 EXPORT_SYMBOL(iwl_toggle_tx_ant);
156
157 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
158 EXPORT_SYMBOL(iwl_bcast_addr);
159
160
161 /* This function both allocates and initializes hw and priv. */
162 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
163 struct ieee80211_ops *hw_ops)
164 {
165 struct iwl_priv *priv;
166
167 /* mac80211 allocates memory for this device instance, including
168 * space for this driver's private structure */
169 struct ieee80211_hw *hw =
170 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
171 if (hw == NULL) {
172 printk(KERN_ERR "%s: Can not allocate network device\n",
173 cfg->name);
174 goto out;
175 }
176
177 priv = hw->priv;
178 priv->hw = hw;
179
180 out:
181 return hw;
182 }
183 EXPORT_SYMBOL(iwl_alloc_all);
184
185 void iwl_hw_detect(struct iwl_priv *priv)
186 {
187 priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
188 priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
189 pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
190 }
191 EXPORT_SYMBOL(iwl_hw_detect);
192
193 /*
194 * QoS support
195 */
196 static void iwl_update_qos(struct iwl_priv *priv)
197 {
198 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
199 return;
200
201 priv->qos_data.def_qos_parm.qos_flags = 0;
202
203 if (priv->qos_data.qos_active)
204 priv->qos_data.def_qos_parm.qos_flags |=
205 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
206
207 if (priv->current_ht_config.is_ht)
208 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
209
210 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
211 priv->qos_data.qos_active,
212 priv->qos_data.def_qos_parm.qos_flags);
213
214 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
215 sizeof(struct iwl_qosparam_cmd),
216 &priv->qos_data.def_qos_parm, NULL);
217 }
218
219 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
220 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
221 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
222 struct ieee80211_sta_ht_cap *ht_info,
223 enum ieee80211_band band)
224 {
225 u16 max_bit_rate = 0;
226 u8 rx_chains_num = priv->hw_params.rx_chains_num;
227 u8 tx_chains_num = priv->hw_params.tx_chains_num;
228
229 ht_info->cap = 0;
230 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
231
232 ht_info->ht_supported = true;
233
234 if (priv->cfg->ht_greenfield_support)
235 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
236 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
237 max_bit_rate = MAX_BIT_RATE_20_MHZ;
238 if (priv->hw_params.ht40_channel & BIT(band)) {
239 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
240 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
241 ht_info->mcs.rx_mask[4] = 0x01;
242 max_bit_rate = MAX_BIT_RATE_40_MHZ;
243 }
244
245 if (priv->cfg->mod_params->amsdu_size_8K)
246 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
247
248 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
249 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
250
251 ht_info->mcs.rx_mask[0] = 0xFF;
252 if (rx_chains_num >= 2)
253 ht_info->mcs.rx_mask[1] = 0xFF;
254 if (rx_chains_num >= 3)
255 ht_info->mcs.rx_mask[2] = 0xFF;
256
257 /* Highest supported Rx data rate */
258 max_bit_rate *= rx_chains_num;
259 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
260 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
261
262 /* Tx MCS capabilities */
263 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
264 if (tx_chains_num != rx_chains_num) {
265 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
266 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
267 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
268 }
269 }
270
271 /**
272 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
273 */
274 int iwlcore_init_geos(struct iwl_priv *priv)
275 {
276 struct iwl_channel_info *ch;
277 struct ieee80211_supported_band *sband;
278 struct ieee80211_channel *channels;
279 struct ieee80211_channel *geo_ch;
280 struct ieee80211_rate *rates;
281 int i = 0;
282
283 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
284 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
285 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
286 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
287 return 0;
288 }
289
290 channels = kzalloc(sizeof(struct ieee80211_channel) *
291 priv->channel_count, GFP_KERNEL);
292 if (!channels)
293 return -ENOMEM;
294
295 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
296 GFP_KERNEL);
297 if (!rates) {
298 kfree(channels);
299 return -ENOMEM;
300 }
301
302 /* 5.2GHz channels start after the 2.4GHz channels */
303 sband = &priv->bands[IEEE80211_BAND_5GHZ];
304 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
305 /* just OFDM */
306 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
307 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
308
309 if (priv->cfg->sku & IWL_SKU_N)
310 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
311 IEEE80211_BAND_5GHZ);
312
313 sband = &priv->bands[IEEE80211_BAND_2GHZ];
314 sband->channels = channels;
315 /* OFDM & CCK */
316 sband->bitrates = rates;
317 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
318
319 if (priv->cfg->sku & IWL_SKU_N)
320 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
321 IEEE80211_BAND_2GHZ);
322
323 priv->ieee_channels = channels;
324 priv->ieee_rates = rates;
325
326 for (i = 0; i < priv->channel_count; i++) {
327 ch = &priv->channel_info[i];
328
329 /* FIXME: might be removed if scan is OK */
330 if (!is_channel_valid(ch))
331 continue;
332
333 if (is_channel_a_band(ch))
334 sband = &priv->bands[IEEE80211_BAND_5GHZ];
335 else
336 sband = &priv->bands[IEEE80211_BAND_2GHZ];
337
338 geo_ch = &sband->channels[sband->n_channels++];
339
340 geo_ch->center_freq =
341 ieee80211_channel_to_frequency(ch->channel);
342 geo_ch->max_power = ch->max_power_avg;
343 geo_ch->max_antenna_gain = 0xff;
344 geo_ch->hw_value = ch->channel;
345
346 if (is_channel_valid(ch)) {
347 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
348 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
349
350 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
351 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
352
353 if (ch->flags & EEPROM_CHANNEL_RADAR)
354 geo_ch->flags |= IEEE80211_CHAN_RADAR;
355
356 geo_ch->flags |= ch->ht40_extension_channel;
357
358 if (ch->max_power_avg > priv->tx_power_device_lmt)
359 priv->tx_power_device_lmt = ch->max_power_avg;
360 } else {
361 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
362 }
363
364 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
365 ch->channel, geo_ch->center_freq,
366 is_channel_a_band(ch) ? "5.2" : "2.4",
367 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
368 "restricted" : "valid",
369 geo_ch->flags);
370 }
371
372 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
373 priv->cfg->sku & IWL_SKU_A) {
374 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
375 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
376 priv->pci_dev->device,
377 priv->pci_dev->subsystem_device);
378 priv->cfg->sku &= ~IWL_SKU_A;
379 }
380
381 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
382 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
383 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
384
385 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
386
387 return 0;
388 }
389 EXPORT_SYMBOL(iwlcore_init_geos);
390
391 /*
392 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
393 */
394 void iwlcore_free_geos(struct iwl_priv *priv)
395 {
396 kfree(priv->ieee_channels);
397 kfree(priv->ieee_rates);
398 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
399 }
400 EXPORT_SYMBOL(iwlcore_free_geos);
401
402 /*
403 * iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
404 * function.
405 */
406 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
407 __le32 *tx_flags)
408 {
409 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
410 *tx_flags |= TX_CMD_FLG_RTS_MSK;
411 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
412 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
413 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
414 *tx_flags |= TX_CMD_FLG_CTS_MSK;
415 }
416 }
417 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
418
419 static bool is_single_rx_stream(struct iwl_priv *priv)
420 {
421 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
422 priv->current_ht_config.single_chain_sufficient;
423 }
424
425 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
426 enum ieee80211_band band,
427 u16 channel, u8 extension_chan_offset)
428 {
429 const struct iwl_channel_info *ch_info;
430
431 ch_info = iwl_get_channel_info(priv, band, channel);
432 if (!is_channel_valid(ch_info))
433 return 0;
434
435 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
436 return !(ch_info->ht40_extension_channel &
437 IEEE80211_CHAN_NO_HT40PLUS);
438 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
439 return !(ch_info->ht40_extension_channel &
440 IEEE80211_CHAN_NO_HT40MINUS);
441
442 return 0;
443 }
444
445 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
446 struct ieee80211_sta_ht_cap *sta_ht_inf)
447 {
448 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
449
450 if (!ht_conf->is_ht || !ht_conf->is_40mhz)
451 return 0;
452
453 /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
454 * the bit will not set if it is pure 40MHz case
455 */
456 if (sta_ht_inf) {
457 if (!sta_ht_inf->ht_supported)
458 return 0;
459 }
460 #ifdef CONFIG_IWLWIFI_DEBUGFS
461 if (priv->disable_ht40)
462 return 0;
463 #endif
464 return iwl_is_channel_extension(priv, priv->band,
465 le16_to_cpu(priv->staging_rxon.channel),
466 ht_conf->extension_chan_offset);
467 }
468 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
469
470 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
471 {
472 u16 new_val = 0;
473 u16 beacon_factor = 0;
474
475 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
476 new_val = beacon_val / beacon_factor;
477
478 if (!new_val)
479 new_val = max_beacon_val;
480
481 return new_val;
482 }
483
484 void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif)
485 {
486 u64 tsf;
487 s32 interval_tm, rem;
488 unsigned long flags;
489 struct ieee80211_conf *conf = NULL;
490 u16 beacon_int;
491
492 conf = ieee80211_get_hw_conf(priv->hw);
493
494 spin_lock_irqsave(&priv->lock, flags);
495 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
496 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
497
498 beacon_int = vif->bss_conf.beacon_int;
499
500 if (vif->type == NL80211_IFTYPE_ADHOC) {
501 /* TODO: we need to get atim_window from upper stack
502 * for now we set to 0 */
503 priv->rxon_timing.atim_window = 0;
504 } else {
505 priv->rxon_timing.atim_window = 0;
506 }
507
508 beacon_int = iwl_adjust_beacon_interval(beacon_int,
509 priv->hw_params.max_beacon_itrvl * 1024);
510 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
511
512 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
513 interval_tm = beacon_int * 1024;
514 rem = do_div(tsf, interval_tm);
515 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
516
517 spin_unlock_irqrestore(&priv->lock, flags);
518 IWL_DEBUG_ASSOC(priv,
519 "beacon interval %d beacon timer %d beacon tim %d\n",
520 le16_to_cpu(priv->rxon_timing.beacon_interval),
521 le32_to_cpu(priv->rxon_timing.beacon_init_val),
522 le16_to_cpu(priv->rxon_timing.atim_window));
523 }
524 EXPORT_SYMBOL(iwl_setup_rxon_timing);
525
526 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
527 {
528 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
529
530 if (hw_decrypt)
531 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
532 else
533 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
534
535 }
536 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
537
538 /**
539 * iwl_check_rxon_cmd - validate RXON structure is valid
540 *
541 * NOTE: This is really only useful during development and can eventually
542 * be #ifdef'd out once the driver is stable and folks aren't actively
543 * making changes
544 */
545 int iwl_check_rxon_cmd(struct iwl_priv *priv)
546 {
547 int error = 0;
548 int counter = 1;
549 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
550
551 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
552 error |= le32_to_cpu(rxon->flags &
553 (RXON_FLG_TGJ_NARROW_BAND_MSK |
554 RXON_FLG_RADAR_DETECT_MSK));
555 if (error)
556 IWL_WARN(priv, "check 24G fields %d | %d\n",
557 counter++, error);
558 } else {
559 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
560 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
561 if (error)
562 IWL_WARN(priv, "check 52 fields %d | %d\n",
563 counter++, error);
564 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
565 if (error)
566 IWL_WARN(priv, "check 52 CCK %d | %d\n",
567 counter++, error);
568 }
569 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
570 if (error)
571 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
572
573 /* make sure basic rates 6Mbps and 1Mbps are supported */
574 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
575 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
576 if (error)
577 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
578
579 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
580 if (error)
581 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
582
583 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
584 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
585 if (error)
586 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
587 counter++, error);
588
589 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
590 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
591 if (error)
592 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
593 counter++, error);
594
595 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
596 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
597 if (error)
598 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
599 counter++, error);
600
601 if (error)
602 IWL_WARN(priv, "Tuning to channel %d\n",
603 le16_to_cpu(rxon->channel));
604
605 if (error) {
606 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
607 return -1;
608 }
609 return 0;
610 }
611 EXPORT_SYMBOL(iwl_check_rxon_cmd);
612
613 /**
614 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
615 * @priv: staging_rxon is compared to active_rxon
616 *
617 * If the RXON structure is changing enough to require a new tune,
618 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
619 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
620 */
621 int iwl_full_rxon_required(struct iwl_priv *priv)
622 {
623
624 /* These items are only settable from the full RXON command */
625 if (!(iwl_is_associated(priv)) ||
626 compare_ether_addr(priv->staging_rxon.bssid_addr,
627 priv->active_rxon.bssid_addr) ||
628 compare_ether_addr(priv->staging_rxon.node_addr,
629 priv->active_rxon.node_addr) ||
630 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
631 priv->active_rxon.wlap_bssid_addr) ||
632 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
633 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
634 (priv->staging_rxon.air_propagation !=
635 priv->active_rxon.air_propagation) ||
636 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
637 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
638 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
639 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
640 (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
641 priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
642 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
643 return 1;
644
645 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
646 * be updated with the RXON_ASSOC command -- however only some
647 * flag transitions are allowed using RXON_ASSOC */
648
649 /* Check if we are not switching bands */
650 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
651 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
652 return 1;
653
654 /* Check if we are switching association toggle */
655 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
656 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
657 return 1;
658
659 return 0;
660 }
661 EXPORT_SYMBOL(iwl_full_rxon_required);
662
663 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
664 {
665 /*
666 * Assign the lowest rate -- should really get this from
667 * the beacon skb from mac80211.
668 */
669 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
670 return IWL_RATE_1M_PLCP;
671 else
672 return IWL_RATE_6M_PLCP;
673 }
674 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
675
676 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
677 {
678 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
679
680 if (!ht_conf->is_ht) {
681 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
682 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
683 RXON_FLG_HT40_PROT_MSK |
684 RXON_FLG_HT_PROT_MSK);
685 return;
686 }
687
688 /* FIXME: if the definition of ht_protection changed, the "translation"
689 * will be needed for rxon->flags
690 */
691 rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
692
693 /* Set up channel bandwidth:
694 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
695 /* clear the HT channel mode before set the mode */
696 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
697 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
698 if (iwl_is_ht40_tx_allowed(priv, NULL)) {
699 /* pure ht40 */
700 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
701 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
702 /* Note: control channel is opposite of extension channel */
703 switch (ht_conf->extension_chan_offset) {
704 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
705 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
706 break;
707 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
708 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
709 break;
710 }
711 } else {
712 /* Note: control channel is opposite of extension channel */
713 switch (ht_conf->extension_chan_offset) {
714 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
715 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
716 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
717 break;
718 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
719 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
720 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
721 break;
722 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
723 default:
724 /* channel location only valid if in Mixed mode */
725 IWL_ERR(priv, "invalid extension channel offset\n");
726 break;
727 }
728 }
729 } else {
730 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
731 }
732
733 if (priv->cfg->ops->hcmd->set_rxon_chain)
734 priv->cfg->ops->hcmd->set_rxon_chain(priv);
735
736 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
737 "extension channel offset 0x%x\n",
738 le32_to_cpu(rxon->flags), ht_conf->ht_protection,
739 ht_conf->extension_chan_offset);
740 }
741 EXPORT_SYMBOL(iwl_set_rxon_ht);
742
743 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
744 #define IWL_NUM_RX_CHAINS_SINGLE 2
745 #define IWL_NUM_IDLE_CHAINS_DUAL 2
746 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
747
748 /*
749 * Determine how many receiver/antenna chains to use.
750 *
751 * More provides better reception via diversity. Fewer saves power
752 * at the expense of throughput, but only when not in powersave to
753 * start with.
754 *
755 * MIMO (dual stream) requires at least 2, but works better with 3.
756 * This does not determine *which* chains to use, just how many.
757 */
758 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
759 {
760 /* # of Rx chains to use when expecting MIMO. */
761 if (is_single_rx_stream(priv))
762 return IWL_NUM_RX_CHAINS_SINGLE;
763 else
764 return IWL_NUM_RX_CHAINS_MULTIPLE;
765 }
766
767 /*
768 * When we are in power saving mode, unless device support spatial
769 * multiplexing power save, use the active count for rx chain count.
770 */
771 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
772 {
773 /* # Rx chains when idling, depending on SMPS mode */
774 switch (priv->current_ht_config.smps) {
775 case IEEE80211_SMPS_STATIC:
776 case IEEE80211_SMPS_DYNAMIC:
777 return IWL_NUM_IDLE_CHAINS_SINGLE;
778 case IEEE80211_SMPS_OFF:
779 return active_cnt;
780 default:
781 WARN(1, "invalid SMPS mode %d",
782 priv->current_ht_config.smps);
783 return active_cnt;
784 }
785 }
786
787 /* up to 4 chains */
788 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
789 {
790 u8 res;
791 res = (chain_bitmap & BIT(0)) >> 0;
792 res += (chain_bitmap & BIT(1)) >> 1;
793 res += (chain_bitmap & BIT(2)) >> 2;
794 res += (chain_bitmap & BIT(3)) >> 3;
795 return res;
796 }
797
798 /**
799 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
800 *
801 * Selects how many and which Rx receivers/antennas/chains to use.
802 * This should not be used for scan command ... it puts data in wrong place.
803 */
804 void iwl_set_rxon_chain(struct iwl_priv *priv)
805 {
806 bool is_single = is_single_rx_stream(priv);
807 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
808 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
809 u32 active_chains;
810 u16 rx_chain;
811
812 /* Tell uCode which antennas are actually connected.
813 * Before first association, we assume all antennas are connected.
814 * Just after first association, iwl_chain_noise_calibration()
815 * checks which antennas actually *are* connected. */
816 if (priv->chain_noise_data.active_chains)
817 active_chains = priv->chain_noise_data.active_chains;
818 else
819 active_chains = priv->hw_params.valid_rx_ant;
820
821 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
822
823 /* How many receivers should we use? */
824 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
825 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
826
827
828 /* correct rx chain count according hw settings
829 * and chain noise calibration
830 */
831 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
832 if (valid_rx_cnt < active_rx_cnt)
833 active_rx_cnt = valid_rx_cnt;
834
835 if (valid_rx_cnt < idle_rx_cnt)
836 idle_rx_cnt = valid_rx_cnt;
837
838 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
839 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
840
841 priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
842
843 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
844 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
845 else
846 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
847
848 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
849 priv->staging_rxon.rx_chain,
850 active_rx_cnt, idle_rx_cnt);
851
852 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
853 active_rx_cnt < idle_rx_cnt);
854 }
855 EXPORT_SYMBOL(iwl_set_rxon_chain);
856
857 /**
858 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
859 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
860 * @channel: Any channel valid for the requested phymode
861
862 * In addition to setting the staging RXON, priv->phymode is also set.
863 *
864 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
865 * in the staging RXON flag structure based on the phymode
866 */
867 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
868 {
869 enum ieee80211_band band = ch->band;
870 u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
871
872 if (!iwl_get_channel_info(priv, band, channel)) {
873 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
874 channel, band);
875 return -EINVAL;
876 }
877
878 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
879 (priv->band == band))
880 return 0;
881
882 priv->staging_rxon.channel = cpu_to_le16(channel);
883 if (band == IEEE80211_BAND_5GHZ)
884 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
885 else
886 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
887
888 priv->band = band;
889
890 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
891
892 return 0;
893 }
894 EXPORT_SYMBOL(iwl_set_rxon_channel);
895
896 static void iwl_set_flags_for_band(struct iwl_priv *priv,
897 enum ieee80211_band band,
898 struct ieee80211_vif *vif)
899 {
900 if (band == IEEE80211_BAND_5GHZ) {
901 priv->staging_rxon.flags &=
902 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
903 | RXON_FLG_CCK_MSK);
904 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
905 } else {
906 /* Copied from iwl_post_associate() */
907 if (vif && vif->bss_conf.use_short_slot)
908 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
909 else
910 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
911
912 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
913 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
914 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
915 }
916 }
917
918 /*
919 * initialize rxon structure with default values from eeprom
920 */
921 void iwl_connection_init_rx_config(struct iwl_priv *priv,
922 struct ieee80211_vif *vif)
923 {
924 const struct iwl_channel_info *ch_info;
925 enum nl80211_iftype type = NL80211_IFTYPE_STATION;
926
927 if (vif)
928 type = vif->type;
929
930 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
931
932 switch (type) {
933 case NL80211_IFTYPE_AP:
934 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
935 break;
936
937 case NL80211_IFTYPE_STATION:
938 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
939 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
940 break;
941
942 case NL80211_IFTYPE_ADHOC:
943 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
944 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
945 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
946 RXON_FILTER_ACCEPT_GRP_MSK;
947 break;
948
949 default:
950 IWL_ERR(priv, "Unsupported interface type %d\n", type);
951 break;
952 }
953
954 #if 0
955 /* TODO: Figure out when short_preamble would be set and cache from
956 * that */
957 if (!hw_to_local(priv->hw)->short_preamble)
958 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
959 else
960 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
961 #endif
962
963 ch_info = iwl_get_channel_info(priv, priv->band,
964 le16_to_cpu(priv->active_rxon.channel));
965
966 if (!ch_info)
967 ch_info = &priv->channel_info[0];
968
969 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
970 priv->band = ch_info->band;
971
972 iwl_set_flags_for_band(priv, priv->band, vif);
973
974 priv->staging_rxon.ofdm_basic_rates =
975 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
976 priv->staging_rxon.cck_basic_rates =
977 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
978
979 /* clear both MIX and PURE40 mode flag */
980 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
981 RXON_FLG_CHANNEL_MODE_PURE_40);
982 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
983 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
984 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
985 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
986 priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
987 }
988 EXPORT_SYMBOL(iwl_connection_init_rx_config);
989
990 static void iwl_set_rate(struct iwl_priv *priv)
991 {
992 const struct ieee80211_supported_band *hw = NULL;
993 struct ieee80211_rate *rate;
994 int i;
995
996 hw = iwl_get_hw_mode(priv, priv->band);
997 if (!hw) {
998 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
999 return;
1000 }
1001
1002 priv->active_rate = 0;
1003
1004 for (i = 0; i < hw->n_bitrates; i++) {
1005 rate = &(hw->bitrates[i]);
1006 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1007 priv->active_rate |= (1 << rate->hw_value);
1008 }
1009
1010 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1011
1012 priv->staging_rxon.cck_basic_rates =
1013 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1014
1015 priv->staging_rxon.ofdm_basic_rates =
1016 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1017 }
1018
1019 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1020 {
1021 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1022 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1023 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1024
1025 if (priv->switch_rxon.switch_in_progress) {
1026 if (!le32_to_cpu(csa->status) &&
1027 (csa->channel == priv->switch_rxon.channel)) {
1028 rxon->channel = csa->channel;
1029 priv->staging_rxon.channel = csa->channel;
1030 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1031 le16_to_cpu(csa->channel));
1032 } else
1033 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1034 le16_to_cpu(csa->channel));
1035
1036 priv->switch_rxon.switch_in_progress = false;
1037 }
1038 }
1039 EXPORT_SYMBOL(iwl_rx_csa);
1040
1041 #ifdef CONFIG_IWLWIFI_DEBUG
1042 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1043 {
1044 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1045
1046 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1047 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1048 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1049 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1050 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1051 le32_to_cpu(rxon->filter_flags));
1052 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1053 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1054 rxon->ofdm_basic_rates);
1055 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1056 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1057 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1058 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1059 }
1060 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1061 #endif
1062 /**
1063 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1064 */
1065 void iwl_irq_handle_error(struct iwl_priv *priv)
1066 {
1067 /* Set the FW error flag -- cleared on iwl_down */
1068 set_bit(STATUS_FW_ERROR, &priv->status);
1069
1070 /* Cancel currently queued command. */
1071 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1072
1073 IWL_ERR(priv, "Loaded firmware version: %s\n",
1074 priv->hw->wiphy->fw_version);
1075
1076 priv->cfg->ops->lib->dump_nic_error_log(priv);
1077 if (priv->cfg->ops->lib->dump_csr)
1078 priv->cfg->ops->lib->dump_csr(priv);
1079 if (priv->cfg->ops->lib->dump_fh)
1080 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1081 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1082 #ifdef CONFIG_IWLWIFI_DEBUG
1083 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1084 iwl_print_rx_config_cmd(priv);
1085 #endif
1086
1087 wake_up_interruptible(&priv->wait_command_queue);
1088
1089 /* Keep the restart process from trying to send host
1090 * commands by clearing the INIT status bit */
1091 clear_bit(STATUS_READY, &priv->status);
1092
1093 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1094 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1095 "Restarting adapter due to uCode error.\n");
1096
1097 if (priv->cfg->mod_params->restart_fw)
1098 queue_work(priv->workqueue, &priv->restart);
1099 }
1100 }
1101 EXPORT_SYMBOL(iwl_irq_handle_error);
1102
1103 static int iwl_apm_stop_master(struct iwl_priv *priv)
1104 {
1105 int ret = 0;
1106
1107 /* stop device's busmaster DMA activity */
1108 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1109
1110 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1111 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1112 if (ret)
1113 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1114
1115 IWL_DEBUG_INFO(priv, "stop master\n");
1116
1117 return ret;
1118 }
1119
1120 void iwl_apm_stop(struct iwl_priv *priv)
1121 {
1122 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1123
1124 /* Stop device's DMA activity */
1125 iwl_apm_stop_master(priv);
1126
1127 /* Reset the entire device */
1128 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1129
1130 udelay(10);
1131
1132 /*
1133 * Clear "initialization complete" bit to move adapter from
1134 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1135 */
1136 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1137 }
1138 EXPORT_SYMBOL(iwl_apm_stop);
1139
1140
1141 /*
1142 * Start up NIC's basic functionality after it has been reset
1143 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1144 * NOTE: This does not load uCode nor start the embedded processor
1145 */
1146 int iwl_apm_init(struct iwl_priv *priv)
1147 {
1148 int ret = 0;
1149 u16 lctl;
1150
1151 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1152
1153 /*
1154 * Use "set_bit" below rather than "write", to preserve any hardware
1155 * bits already set by default after reset.
1156 */
1157
1158 /* Disable L0S exit timer (platform NMI Work/Around) */
1159 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1160 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1161
1162 /*
1163 * Disable L0s without affecting L1;
1164 * don't wait for ICH L0s (ICH bug W/A)
1165 */
1166 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1167 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1168
1169 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1170 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1171
1172 /*
1173 * Enable HAP INTA (interrupt from management bus) to
1174 * wake device's PCI Express link L1a -> L0s
1175 * NOTE: This is no-op for 3945 (non-existant bit)
1176 */
1177 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1178 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1179
1180 /*
1181 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1182 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1183 * If so (likely), disable L0S, so device moves directly L0->L1;
1184 * costs negligible amount of power savings.
1185 * If not (unlikely), enable L0S, so there is at least some
1186 * power savings, even without L1.
1187 */
1188 if (priv->cfg->set_l0s) {
1189 lctl = iwl_pcie_link_ctl(priv);
1190 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1191 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1192 /* L1-ASPM enabled; disable(!) L0S */
1193 iwl_set_bit(priv, CSR_GIO_REG,
1194 CSR_GIO_REG_VAL_L0S_ENABLED);
1195 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1196 } else {
1197 /* L1-ASPM disabled; enable(!) L0S */
1198 iwl_clear_bit(priv, CSR_GIO_REG,
1199 CSR_GIO_REG_VAL_L0S_ENABLED);
1200 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1201 }
1202 }
1203
1204 /* Configure analog phase-lock-loop before activating to D0A */
1205 if (priv->cfg->pll_cfg_val)
1206 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1207
1208 /*
1209 * Set "initialization complete" bit to move adapter from
1210 * D0U* --> D0A* (powered-up active) state.
1211 */
1212 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1213
1214 /*
1215 * Wait for clock stabilization; once stabilized, access to
1216 * device-internal resources is supported, e.g. iwl_write_prph()
1217 * and accesses to uCode SRAM.
1218 */
1219 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1220 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1221 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1222 if (ret < 0) {
1223 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1224 goto out;
1225 }
1226
1227 /*
1228 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1229 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1230 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1231 * and don't need BSM to restore data after power-saving sleep.
1232 *
1233 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1234 * do not disable clocks. This preserves any hardware bits already
1235 * set by default in "CLK_CTRL_REG" after reset.
1236 */
1237 if (priv->cfg->use_bsm)
1238 iwl_write_prph(priv, APMG_CLK_EN_REG,
1239 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1240 else
1241 iwl_write_prph(priv, APMG_CLK_EN_REG,
1242 APMG_CLK_VAL_DMA_CLK_RQT);
1243 udelay(20);
1244
1245 /* Disable L1-Active */
1246 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1247 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1248
1249 out:
1250 return ret;
1251 }
1252 EXPORT_SYMBOL(iwl_apm_init);
1253
1254
1255
1256 void iwl_configure_filter(struct ieee80211_hw *hw,
1257 unsigned int changed_flags,
1258 unsigned int *total_flags,
1259 u64 multicast)
1260 {
1261 struct iwl_priv *priv = hw->priv;
1262 __le32 filter_or = 0, filter_nand = 0;
1263
1264 #define CHK(test, flag) do { \
1265 if (*total_flags & (test)) \
1266 filter_or |= (flag); \
1267 else \
1268 filter_nand |= (flag); \
1269 } while (0)
1270
1271 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1272 changed_flags, *total_flags);
1273
1274 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1275 CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1276 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1277 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1278
1279 #undef CHK
1280
1281 mutex_lock(&priv->mutex);
1282
1283 priv->staging_rxon.filter_flags &= ~filter_nand;
1284 priv->staging_rxon.filter_flags |= filter_or;
1285
1286 iwlcore_commit_rxon(priv);
1287
1288 mutex_unlock(&priv->mutex);
1289
1290 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1291 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1292 }
1293 EXPORT_SYMBOL(iwl_configure_filter);
1294
1295 int iwl_set_hw_params(struct iwl_priv *priv)
1296 {
1297 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1298 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1299 if (priv->cfg->mod_params->amsdu_size_8K)
1300 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1301 else
1302 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1303
1304 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1305
1306 if (priv->cfg->mod_params->disable_11n)
1307 priv->cfg->sku &= ~IWL_SKU_N;
1308
1309 /* Device-specific setup */
1310 return priv->cfg->ops->lib->set_hw_params(priv);
1311 }
1312 EXPORT_SYMBOL(iwl_set_hw_params);
1313
1314 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1315 {
1316 int ret = 0;
1317 s8 prev_tx_power = priv->tx_power_user_lmt;
1318
1319 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1320 IWL_WARN(priv,
1321 "Requested user TXPOWER %d below lower limit %d.\n",
1322 tx_power,
1323 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1324 return -EINVAL;
1325 }
1326
1327 if (tx_power > priv->tx_power_device_lmt) {
1328 IWL_WARN(priv,
1329 "Requested user TXPOWER %d above upper limit %d.\n",
1330 tx_power, priv->tx_power_device_lmt);
1331 return -EINVAL;
1332 }
1333
1334 if (priv->tx_power_user_lmt != tx_power)
1335 force = true;
1336
1337 /* if nic is not up don't send command */
1338 if (iwl_is_ready_rf(priv)) {
1339 priv->tx_power_user_lmt = tx_power;
1340 if (force && priv->cfg->ops->lib->send_tx_power)
1341 ret = priv->cfg->ops->lib->send_tx_power(priv);
1342 else if (!priv->cfg->ops->lib->send_tx_power)
1343 ret = -EOPNOTSUPP;
1344 /*
1345 * if fail to set tx_power, restore the orig. tx power
1346 */
1347 if (ret)
1348 priv->tx_power_user_lmt = prev_tx_power;
1349 }
1350
1351 /*
1352 * Even this is an async host command, the command
1353 * will always report success from uCode
1354 * So once driver can placing the command into the queue
1355 * successfully, driver can use priv->tx_power_user_lmt
1356 * to reflect the current tx power
1357 */
1358 return ret;
1359 }
1360 EXPORT_SYMBOL(iwl_set_tx_power);
1361
1362 irqreturn_t iwl_isr_legacy(int irq, void *data)
1363 {
1364 struct iwl_priv *priv = data;
1365 u32 inta, inta_mask;
1366 u32 inta_fh;
1367 unsigned long flags;
1368 if (!priv)
1369 return IRQ_NONE;
1370
1371 spin_lock_irqsave(&priv->lock, flags);
1372
1373 /* Disable (but don't clear!) interrupts here to avoid
1374 * back-to-back ISRs and sporadic interrupts from our NIC.
1375 * If we have something to service, the tasklet will re-enable ints.
1376 * If we *don't* have something, we'll re-enable before leaving here. */
1377 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1378 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1379
1380 /* Discover which interrupts are active/pending */
1381 inta = iwl_read32(priv, CSR_INT);
1382 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1383
1384 /* Ignore interrupt if there's nothing in NIC to service.
1385 * This may be due to IRQ shared with another device,
1386 * or due to sporadic interrupts thrown from our NIC. */
1387 if (!inta && !inta_fh) {
1388 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1389 goto none;
1390 }
1391
1392 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1393 /* Hardware disappeared. It might have already raised
1394 * an interrupt */
1395 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1396 goto unplugged;
1397 }
1398
1399 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1400 inta, inta_mask, inta_fh);
1401
1402 inta &= ~CSR_INT_BIT_SCD;
1403
1404 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1405 if (likely(inta || inta_fh))
1406 tasklet_schedule(&priv->irq_tasklet);
1407
1408 unplugged:
1409 spin_unlock_irqrestore(&priv->lock, flags);
1410 return IRQ_HANDLED;
1411
1412 none:
1413 /* re-enable interrupts here since we don't have anything to service. */
1414 /* only Re-enable if diabled by irq */
1415 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1416 iwl_enable_interrupts(priv);
1417 spin_unlock_irqrestore(&priv->lock, flags);
1418 return IRQ_NONE;
1419 }
1420 EXPORT_SYMBOL(iwl_isr_legacy);
1421
1422 void iwl_send_bt_config(struct iwl_priv *priv)
1423 {
1424 struct iwl_bt_cmd bt_cmd = {
1425 .lead_time = BT_LEAD_TIME_DEF,
1426 .max_kill = BT_MAX_KILL_DEF,
1427 .kill_ack_mask = 0,
1428 .kill_cts_mask = 0,
1429 };
1430
1431 if (!bt_coex_active)
1432 bt_cmd.flags = BT_COEX_DISABLE;
1433 else
1434 bt_cmd.flags = BT_COEX_ENABLE;
1435
1436 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1437 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1438
1439 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1440 sizeof(struct iwl_bt_cmd), &bt_cmd))
1441 IWL_ERR(priv, "failed to send BT Coex Config\n");
1442 }
1443 EXPORT_SYMBOL(iwl_send_bt_config);
1444
1445 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1446 {
1447 struct iwl_statistics_cmd statistics_cmd = {
1448 .configuration_flags =
1449 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1450 };
1451
1452 if (flags & CMD_ASYNC)
1453 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1454 sizeof(struct iwl_statistics_cmd),
1455 &statistics_cmd, NULL);
1456 else
1457 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1458 sizeof(struct iwl_statistics_cmd),
1459 &statistics_cmd);
1460 }
1461 EXPORT_SYMBOL(iwl_send_statistics_request);
1462
1463 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1464 {
1465 struct iwl_ct_kill_config cmd;
1466 struct iwl_ct_kill_throttling_config adv_cmd;
1467 unsigned long flags;
1468 int ret = 0;
1469
1470 spin_lock_irqsave(&priv->lock, flags);
1471 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1472 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1473 spin_unlock_irqrestore(&priv->lock, flags);
1474 priv->thermal_throttle.ct_kill_toggle = false;
1475
1476 if (priv->cfg->support_ct_kill_exit) {
1477 adv_cmd.critical_temperature_enter =
1478 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1479 adv_cmd.critical_temperature_exit =
1480 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1481
1482 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1483 sizeof(adv_cmd), &adv_cmd);
1484 if (ret)
1485 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1486 else
1487 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1488 "succeeded, "
1489 "critical temperature enter is %d,"
1490 "exit is %d\n",
1491 priv->hw_params.ct_kill_threshold,
1492 priv->hw_params.ct_kill_exit_threshold);
1493 } else {
1494 cmd.critical_temperature_R =
1495 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1496
1497 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1498 sizeof(cmd), &cmd);
1499 if (ret)
1500 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1501 else
1502 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1503 "succeeded, "
1504 "critical temperature is %d\n",
1505 priv->hw_params.ct_kill_threshold);
1506 }
1507 }
1508 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1509
1510
1511 /*
1512 * CARD_STATE_CMD
1513 *
1514 * Use: Sets the device's internal card state to enable, disable, or halt
1515 *
1516 * When in the 'enable' state the card operates as normal.
1517 * When in the 'disable' state, the card enters into a low power mode.
1518 * When in the 'halt' state, the card is shut down and must be fully
1519 * restarted to come back on.
1520 */
1521 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1522 {
1523 struct iwl_host_cmd cmd = {
1524 .id = REPLY_CARD_STATE_CMD,
1525 .len = sizeof(u32),
1526 .data = &flags,
1527 .flags = meta_flag,
1528 };
1529
1530 return iwl_send_cmd(priv, &cmd);
1531 }
1532
1533 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1534 struct iwl_rx_mem_buffer *rxb)
1535 {
1536 #ifdef CONFIG_IWLWIFI_DEBUG
1537 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1538 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1539 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1540 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1541 #endif
1542 }
1543 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1544
1545 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1546 struct iwl_rx_mem_buffer *rxb)
1547 {
1548 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1549 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1550 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1551 "notification for %s:\n", len,
1552 get_cmd_string(pkt->hdr.cmd));
1553 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1554 }
1555 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1556
1557 void iwl_rx_reply_error(struct iwl_priv *priv,
1558 struct iwl_rx_mem_buffer *rxb)
1559 {
1560 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1561
1562 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1563 "seq 0x%04X ser 0x%08X\n",
1564 le32_to_cpu(pkt->u.err_resp.error_type),
1565 get_cmd_string(pkt->u.err_resp.cmd_id),
1566 pkt->u.err_resp.cmd_id,
1567 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1568 le32_to_cpu(pkt->u.err_resp.error_info));
1569 }
1570 EXPORT_SYMBOL(iwl_rx_reply_error);
1571
1572 void iwl_clear_isr_stats(struct iwl_priv *priv)
1573 {
1574 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1575 }
1576
1577 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1578 const struct ieee80211_tx_queue_params *params)
1579 {
1580 struct iwl_priv *priv = hw->priv;
1581 unsigned long flags;
1582 int q;
1583
1584 IWL_DEBUG_MAC80211(priv, "enter\n");
1585
1586 if (!iwl_is_ready_rf(priv)) {
1587 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1588 return -EIO;
1589 }
1590
1591 if (queue >= AC_NUM) {
1592 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1593 return 0;
1594 }
1595
1596 q = AC_NUM - 1 - queue;
1597
1598 spin_lock_irqsave(&priv->lock, flags);
1599
1600 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1601 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1602 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1603 priv->qos_data.def_qos_parm.ac[q].edca_txop =
1604 cpu_to_le16((params->txop * 32));
1605
1606 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1607
1608 spin_unlock_irqrestore(&priv->lock, flags);
1609
1610 IWL_DEBUG_MAC80211(priv, "leave\n");
1611 return 0;
1612 }
1613 EXPORT_SYMBOL(iwl_mac_conf_tx);
1614
1615 static void iwl_ht_conf(struct iwl_priv *priv,
1616 struct ieee80211_vif *vif)
1617 {
1618 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1619 struct ieee80211_sta *sta;
1620 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1621
1622 IWL_DEBUG_MAC80211(priv, "enter:\n");
1623
1624 if (!ht_conf->is_ht)
1625 return;
1626
1627 ht_conf->ht_protection =
1628 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1629 ht_conf->non_GF_STA_present =
1630 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1631
1632 ht_conf->single_chain_sufficient = false;
1633
1634 switch (vif->type) {
1635 case NL80211_IFTYPE_STATION:
1636 rcu_read_lock();
1637 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1638 if (sta) {
1639 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1640 int maxstreams;
1641
1642 maxstreams = (ht_cap->mcs.tx_params &
1643 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1644 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1645 maxstreams += 1;
1646
1647 if ((ht_cap->mcs.rx_mask[1] == 0) &&
1648 (ht_cap->mcs.rx_mask[2] == 0))
1649 ht_conf->single_chain_sufficient = true;
1650 if (maxstreams <= 1)
1651 ht_conf->single_chain_sufficient = true;
1652 } else {
1653 /*
1654 * If at all, this can only happen through a race
1655 * when the AP disconnects us while we're still
1656 * setting up the connection, in that case mac80211
1657 * will soon tell us about that.
1658 */
1659 ht_conf->single_chain_sufficient = true;
1660 }
1661 rcu_read_unlock();
1662 break;
1663 case NL80211_IFTYPE_ADHOC:
1664 ht_conf->single_chain_sufficient = true;
1665 break;
1666 default:
1667 break;
1668 }
1669
1670 IWL_DEBUG_MAC80211(priv, "leave\n");
1671 }
1672
1673 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1674 {
1675 iwl_led_disassociate(priv);
1676 /*
1677 * inform the ucode that there is no longer an
1678 * association and that no more packets should be
1679 * sent
1680 */
1681 priv->staging_rxon.filter_flags &=
1682 ~RXON_FILTER_ASSOC_MSK;
1683 priv->staging_rxon.assoc_id = 0;
1684 iwlcore_commit_rxon(priv);
1685 }
1686
1687 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1688 struct ieee80211_vif *vif,
1689 struct ieee80211_bss_conf *bss_conf,
1690 u32 changes)
1691 {
1692 struct iwl_priv *priv = hw->priv;
1693 int ret;
1694
1695 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1696
1697 if (!iwl_is_alive(priv))
1698 return;
1699
1700 mutex_lock(&priv->mutex);
1701
1702 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1703 dev_kfree_skb(priv->ibss_beacon);
1704 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1705 }
1706
1707 if (changes & BSS_CHANGED_BEACON_INT) {
1708 /* TODO: in AP mode, do something to make this take effect */
1709 }
1710
1711 if (changes & BSS_CHANGED_BSSID) {
1712 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1713
1714 /*
1715 * If there is currently a HW scan going on in the
1716 * background then we need to cancel it else the RXON
1717 * below/in post_associate will fail.
1718 */
1719 if (iwl_scan_cancel_timeout(priv, 100)) {
1720 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1721 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1722 mutex_unlock(&priv->mutex);
1723 return;
1724 }
1725
1726 /* mac80211 only sets assoc when in STATION mode */
1727 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1728 memcpy(priv->staging_rxon.bssid_addr,
1729 bss_conf->bssid, ETH_ALEN);
1730
1731 /* currently needed in a few places */
1732 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1733 } else {
1734 priv->staging_rxon.filter_flags &=
1735 ~RXON_FILTER_ASSOC_MSK;
1736 }
1737
1738 }
1739
1740 /*
1741 * This needs to be after setting the BSSID in case
1742 * mac80211 decides to do both changes at once because
1743 * it will invoke post_associate.
1744 */
1745 if (vif->type == NL80211_IFTYPE_ADHOC &&
1746 changes & BSS_CHANGED_BEACON) {
1747 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1748
1749 if (beacon)
1750 iwl_mac_beacon_update(hw, beacon);
1751 }
1752
1753 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1754 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1755 bss_conf->use_short_preamble);
1756 if (bss_conf->use_short_preamble)
1757 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1758 else
1759 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1760 }
1761
1762 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1763 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1764 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1765 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1766 else
1767 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1768 }
1769
1770 if (changes & BSS_CHANGED_BASIC_RATES) {
1771 /* XXX use this information
1772 *
1773 * To do that, remove code from iwl_set_rate() and put something
1774 * like this here:
1775 *
1776 if (A-band)
1777 priv->staging_rxon.ofdm_basic_rates =
1778 bss_conf->basic_rates;
1779 else
1780 priv->staging_rxon.ofdm_basic_rates =
1781 bss_conf->basic_rates >> 4;
1782 priv->staging_rxon.cck_basic_rates =
1783 bss_conf->basic_rates & 0xF;
1784 */
1785 }
1786
1787 if (changes & BSS_CHANGED_HT) {
1788 iwl_ht_conf(priv, vif);
1789
1790 if (priv->cfg->ops->hcmd->set_rxon_chain)
1791 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1792 }
1793
1794 if (changes & BSS_CHANGED_ASSOC) {
1795 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1796 if (bss_conf->assoc) {
1797 priv->timestamp = bss_conf->timestamp;
1798
1799 iwl_led_associate(priv);
1800
1801 if (!iwl_is_rfkill(priv))
1802 priv->cfg->ops->lib->post_associate(priv, vif);
1803 } else
1804 iwl_set_no_assoc(priv);
1805 }
1806
1807 if (changes && iwl_is_associated(priv) && bss_conf->aid) {
1808 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1809 changes);
1810 ret = iwl_send_rxon_assoc(priv);
1811 if (!ret) {
1812 /* Sync active_rxon with latest change. */
1813 memcpy((void *)&priv->active_rxon,
1814 &priv->staging_rxon,
1815 sizeof(struct iwl_rxon_cmd));
1816 }
1817 }
1818
1819 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1820 if (vif->bss_conf.enable_beacon) {
1821 memcpy(priv->staging_rxon.bssid_addr,
1822 bss_conf->bssid, ETH_ALEN);
1823 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1824 iwlcore_config_ap(priv, vif);
1825 } else
1826 iwl_set_no_assoc(priv);
1827 }
1828
1829 if (changes & BSS_CHANGED_IBSS) {
1830 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1831 bss_conf->ibss_joined);
1832 if (ret)
1833 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1834 bss_conf->ibss_joined ? "add" : "remove",
1835 bss_conf->bssid);
1836 }
1837
1838 mutex_unlock(&priv->mutex);
1839
1840 IWL_DEBUG_MAC80211(priv, "leave\n");
1841 }
1842 EXPORT_SYMBOL(iwl_bss_info_changed);
1843
1844 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1845 {
1846 struct iwl_priv *priv = hw->priv;
1847 unsigned long flags;
1848 __le64 timestamp;
1849
1850 IWL_DEBUG_MAC80211(priv, "enter\n");
1851
1852 if (!iwl_is_ready_rf(priv)) {
1853 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1854 return -EIO;
1855 }
1856
1857 spin_lock_irqsave(&priv->lock, flags);
1858
1859 if (priv->ibss_beacon)
1860 dev_kfree_skb(priv->ibss_beacon);
1861
1862 priv->ibss_beacon = skb;
1863
1864 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1865 priv->timestamp = le64_to_cpu(timestamp);
1866
1867 IWL_DEBUG_MAC80211(priv, "leave\n");
1868 spin_unlock_irqrestore(&priv->lock, flags);
1869
1870 priv->cfg->ops->lib->post_associate(priv, priv->vif);
1871
1872 return 0;
1873 }
1874 EXPORT_SYMBOL(iwl_mac_beacon_update);
1875
1876 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1877 {
1878 iwl_connection_init_rx_config(priv, vif);
1879
1880 if (priv->cfg->ops->hcmd->set_rxon_chain)
1881 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1882
1883 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1884
1885 return iwlcore_commit_rxon(priv);
1886 }
1887
1888 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1889 {
1890 struct iwl_priv *priv = hw->priv;
1891 int err = 0;
1892
1893 IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
1894
1895 mutex_lock(&priv->mutex);
1896
1897 if (WARN_ON(!iwl_is_ready_rf(priv))) {
1898 err = -EINVAL;
1899 goto out;
1900 }
1901
1902 if (priv->vif) {
1903 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
1904 err = -EOPNOTSUPP;
1905 goto out;
1906 }
1907
1908 priv->vif = vif;
1909 priv->iw_mode = vif->type;
1910
1911 IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
1912 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
1913
1914 err = iwl_set_mode(priv, vif);
1915 if (err)
1916 goto out_err;
1917
1918 goto out;
1919
1920 out_err:
1921 priv->vif = NULL;
1922 priv->iw_mode = NL80211_IFTYPE_STATION;
1923 out:
1924 mutex_unlock(&priv->mutex);
1925
1926 IWL_DEBUG_MAC80211(priv, "leave\n");
1927 return err;
1928 }
1929 EXPORT_SYMBOL(iwl_mac_add_interface);
1930
1931 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1932 struct ieee80211_vif *vif)
1933 {
1934 struct iwl_priv *priv = hw->priv;
1935
1936 IWL_DEBUG_MAC80211(priv, "enter\n");
1937
1938 mutex_lock(&priv->mutex);
1939
1940 if (iwl_is_ready_rf(priv)) {
1941 iwl_scan_cancel_timeout(priv, 100);
1942 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1943 iwlcore_commit_rxon(priv);
1944 }
1945 if (priv->vif == vif) {
1946 priv->vif = NULL;
1947 memset(priv->bssid, 0, ETH_ALEN);
1948 }
1949 mutex_unlock(&priv->mutex);
1950
1951 IWL_DEBUG_MAC80211(priv, "leave\n");
1952
1953 }
1954 EXPORT_SYMBOL(iwl_mac_remove_interface);
1955
1956 /**
1957 * iwl_mac_config - mac80211 config callback
1958 */
1959 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
1960 {
1961 struct iwl_priv *priv = hw->priv;
1962 const struct iwl_channel_info *ch_info;
1963 struct ieee80211_conf *conf = &hw->conf;
1964 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1965 unsigned long flags = 0;
1966 int ret = 0;
1967 u16 ch;
1968 int scan_active = 0;
1969
1970 mutex_lock(&priv->mutex);
1971
1972 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
1973 conf->channel->hw_value, changed);
1974
1975 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
1976 test_bit(STATUS_SCANNING, &priv->status))) {
1977 scan_active = 1;
1978 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1979 }
1980
1981 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1982 IEEE80211_CONF_CHANGE_CHANNEL)) {
1983 /* mac80211 uses static for non-HT which is what we want */
1984 priv->current_ht_config.smps = conf->smps_mode;
1985
1986 /*
1987 * Recalculate chain counts.
1988 *
1989 * If monitor mode is enabled then mac80211 will
1990 * set up the SM PS mode to OFF if an HT channel is
1991 * configured.
1992 */
1993 if (priv->cfg->ops->hcmd->set_rxon_chain)
1994 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1995 }
1996
1997 /* during scanning mac80211 will delay channel setting until
1998 * scan finish with changed = 0
1999 */
2000 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2001 if (scan_active)
2002 goto set_ch_out;
2003
2004 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2005 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2006 if (!is_channel_valid(ch_info)) {
2007 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2008 ret = -EINVAL;
2009 goto set_ch_out;
2010 }
2011
2012 spin_lock_irqsave(&priv->lock, flags);
2013
2014 /* Configure HT40 channels */
2015 ht_conf->is_ht = conf_is_ht(conf);
2016 if (ht_conf->is_ht) {
2017 if (conf_is_ht40_minus(conf)) {
2018 ht_conf->extension_chan_offset =
2019 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2020 ht_conf->is_40mhz = true;
2021 } else if (conf_is_ht40_plus(conf)) {
2022 ht_conf->extension_chan_offset =
2023 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2024 ht_conf->is_40mhz = true;
2025 } else {
2026 ht_conf->extension_chan_offset =
2027 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2028 ht_conf->is_40mhz = false;
2029 }
2030 } else
2031 ht_conf->is_40mhz = false;
2032 /* Default to no protection. Protection mode will later be set
2033 * from BSS config in iwl_ht_conf */
2034 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2035
2036 /* if we are switching from ht to 2.4 clear flags
2037 * from any ht related info since 2.4 does not
2038 * support ht */
2039 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2040 priv->staging_rxon.flags = 0;
2041
2042 iwl_set_rxon_channel(priv, conf->channel);
2043 iwl_set_rxon_ht(priv, ht_conf);
2044
2045 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
2046 spin_unlock_irqrestore(&priv->lock, flags);
2047 if (iwl_is_associated(priv) &&
2048 (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2049 priv->cfg->ops->lib->set_channel_switch) {
2050 iwl_set_rate(priv);
2051 /*
2052 * at this point, staging_rxon has the
2053 * configuration for channel switch
2054 */
2055 ret = priv->cfg->ops->lib->set_channel_switch(priv,
2056 ch);
2057 if (!ret) {
2058 iwl_print_rx_config_cmd(priv);
2059 goto out;
2060 }
2061 priv->switch_rxon.switch_in_progress = false;
2062 }
2063 set_ch_out:
2064 /* The list of supported rates and rate mask can be different
2065 * for each band; since the band may have changed, reset
2066 * the rate mask to what mac80211 lists */
2067 iwl_set_rate(priv);
2068 }
2069
2070 if (changed & (IEEE80211_CONF_CHANGE_PS |
2071 IEEE80211_CONF_CHANGE_IDLE)) {
2072 ret = iwl_power_update_mode(priv, false);
2073 if (ret)
2074 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2075 }
2076
2077 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2078 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2079 priv->tx_power_user_lmt, conf->power_level);
2080
2081 iwl_set_tx_power(priv, conf->power_level, false);
2082 }
2083
2084 if (changed & IEEE80211_CONF_CHANGE_QOS) {
2085 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2086
2087 spin_lock_irqsave(&priv->lock, flags);
2088 priv->qos_data.qos_active = qos_active;
2089 iwl_update_qos(priv);
2090 spin_unlock_irqrestore(&priv->lock, flags);
2091 }
2092
2093 if (!iwl_is_ready(priv)) {
2094 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2095 goto out;
2096 }
2097
2098 if (scan_active)
2099 goto out;
2100
2101 if (memcmp(&priv->active_rxon,
2102 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2103 iwlcore_commit_rxon(priv);
2104 else
2105 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2106
2107
2108 out:
2109 IWL_DEBUG_MAC80211(priv, "leave\n");
2110 mutex_unlock(&priv->mutex);
2111 return ret;
2112 }
2113 EXPORT_SYMBOL(iwl_mac_config);
2114
2115 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2116 {
2117 struct iwl_priv *priv = hw->priv;
2118 unsigned long flags;
2119
2120 mutex_lock(&priv->mutex);
2121 IWL_DEBUG_MAC80211(priv, "enter\n");
2122
2123 spin_lock_irqsave(&priv->lock, flags);
2124 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2125 spin_unlock_irqrestore(&priv->lock, flags);
2126
2127 spin_lock_irqsave(&priv->lock, flags);
2128
2129 /* new association get rid of ibss beacon skb */
2130 if (priv->ibss_beacon)
2131 dev_kfree_skb(priv->ibss_beacon);
2132
2133 priv->ibss_beacon = NULL;
2134
2135 priv->timestamp = 0;
2136
2137 spin_unlock_irqrestore(&priv->lock, flags);
2138
2139 if (!iwl_is_ready_rf(priv)) {
2140 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2141 mutex_unlock(&priv->mutex);
2142 return;
2143 }
2144
2145 /* we are restarting association process
2146 * clear RXON_FILTER_ASSOC_MSK bit
2147 */
2148 iwl_scan_cancel_timeout(priv, 100);
2149 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2150 iwlcore_commit_rxon(priv);
2151
2152 iwl_set_rate(priv);
2153
2154 mutex_unlock(&priv->mutex);
2155
2156 IWL_DEBUG_MAC80211(priv, "leave\n");
2157 }
2158 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2159
2160 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2161 {
2162 if (!priv->txq)
2163 priv->txq = kzalloc(
2164 sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2165 GFP_KERNEL);
2166 if (!priv->txq) {
2167 IWL_ERR(priv, "Not enough memory for txq\n");
2168 return -ENOMEM;
2169 }
2170 return 0;
2171 }
2172 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2173
2174 void iwl_free_txq_mem(struct iwl_priv *priv)
2175 {
2176 kfree(priv->txq);
2177 priv->txq = NULL;
2178 }
2179 EXPORT_SYMBOL(iwl_free_txq_mem);
2180
2181 #ifdef CONFIG_IWLWIFI_DEBUGFS
2182
2183 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2184
2185 void iwl_reset_traffic_log(struct iwl_priv *priv)
2186 {
2187 priv->tx_traffic_idx = 0;
2188 priv->rx_traffic_idx = 0;
2189 if (priv->tx_traffic)
2190 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2191 if (priv->rx_traffic)
2192 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2193 }
2194
2195 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2196 {
2197 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2198
2199 if (iwl_debug_level & IWL_DL_TX) {
2200 if (!priv->tx_traffic) {
2201 priv->tx_traffic =
2202 kzalloc(traffic_size, GFP_KERNEL);
2203 if (!priv->tx_traffic)
2204 return -ENOMEM;
2205 }
2206 }
2207 if (iwl_debug_level & IWL_DL_RX) {
2208 if (!priv->rx_traffic) {
2209 priv->rx_traffic =
2210 kzalloc(traffic_size, GFP_KERNEL);
2211 if (!priv->rx_traffic)
2212 return -ENOMEM;
2213 }
2214 }
2215 iwl_reset_traffic_log(priv);
2216 return 0;
2217 }
2218 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2219
2220 void iwl_free_traffic_mem(struct iwl_priv *priv)
2221 {
2222 kfree(priv->tx_traffic);
2223 priv->tx_traffic = NULL;
2224
2225 kfree(priv->rx_traffic);
2226 priv->rx_traffic = NULL;
2227 }
2228 EXPORT_SYMBOL(iwl_free_traffic_mem);
2229
2230 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2231 u16 length, struct ieee80211_hdr *header)
2232 {
2233 __le16 fc;
2234 u16 len;
2235
2236 if (likely(!(iwl_debug_level & IWL_DL_TX)))
2237 return;
2238
2239 if (!priv->tx_traffic)
2240 return;
2241
2242 fc = header->frame_control;
2243 if (ieee80211_is_data(fc)) {
2244 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2245 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2246 memcpy((priv->tx_traffic +
2247 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2248 header, len);
2249 priv->tx_traffic_idx =
2250 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2251 }
2252 }
2253 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2254
2255 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2256 u16 length, struct ieee80211_hdr *header)
2257 {
2258 __le16 fc;
2259 u16 len;
2260
2261 if (likely(!(iwl_debug_level & IWL_DL_RX)))
2262 return;
2263
2264 if (!priv->rx_traffic)
2265 return;
2266
2267 fc = header->frame_control;
2268 if (ieee80211_is_data(fc)) {
2269 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2270 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2271 memcpy((priv->rx_traffic +
2272 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2273 header, len);
2274 priv->rx_traffic_idx =
2275 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2276 }
2277 }
2278 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2279
2280 const char *get_mgmt_string(int cmd)
2281 {
2282 switch (cmd) {
2283 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2284 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2285 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2286 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2287 IWL_CMD(MANAGEMENT_PROBE_REQ);
2288 IWL_CMD(MANAGEMENT_PROBE_RESP);
2289 IWL_CMD(MANAGEMENT_BEACON);
2290 IWL_CMD(MANAGEMENT_ATIM);
2291 IWL_CMD(MANAGEMENT_DISASSOC);
2292 IWL_CMD(MANAGEMENT_AUTH);
2293 IWL_CMD(MANAGEMENT_DEAUTH);
2294 IWL_CMD(MANAGEMENT_ACTION);
2295 default:
2296 return "UNKNOWN";
2297
2298 }
2299 }
2300
2301 const char *get_ctrl_string(int cmd)
2302 {
2303 switch (cmd) {
2304 IWL_CMD(CONTROL_BACK_REQ);
2305 IWL_CMD(CONTROL_BACK);
2306 IWL_CMD(CONTROL_PSPOLL);
2307 IWL_CMD(CONTROL_RTS);
2308 IWL_CMD(CONTROL_CTS);
2309 IWL_CMD(CONTROL_ACK);
2310 IWL_CMD(CONTROL_CFEND);
2311 IWL_CMD(CONTROL_CFENDACK);
2312 default:
2313 return "UNKNOWN";
2314
2315 }
2316 }
2317
2318 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2319 {
2320 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2321 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2322 priv->led_tpt = 0;
2323 }
2324
2325 /*
2326 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2327 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2328 * Use debugFs to display the rx/rx_statistics
2329 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2330 * information will be recorded, but DATA pkt still will be recorded
2331 * for the reason of iwl_led.c need to control the led blinking based on
2332 * number of tx and rx data.
2333 *
2334 */
2335 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2336 {
2337 struct traffic_stats *stats;
2338
2339 if (is_tx)
2340 stats = &priv->tx_stats;
2341 else
2342 stats = &priv->rx_stats;
2343
2344 if (ieee80211_is_mgmt(fc)) {
2345 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2346 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2347 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2348 break;
2349 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2350 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2351 break;
2352 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2353 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2354 break;
2355 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2356 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2357 break;
2358 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2359 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2360 break;
2361 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2362 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2363 break;
2364 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2365 stats->mgmt[MANAGEMENT_BEACON]++;
2366 break;
2367 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2368 stats->mgmt[MANAGEMENT_ATIM]++;
2369 break;
2370 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2371 stats->mgmt[MANAGEMENT_DISASSOC]++;
2372 break;
2373 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2374 stats->mgmt[MANAGEMENT_AUTH]++;
2375 break;
2376 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2377 stats->mgmt[MANAGEMENT_DEAUTH]++;
2378 break;
2379 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2380 stats->mgmt[MANAGEMENT_ACTION]++;
2381 break;
2382 }
2383 } else if (ieee80211_is_ctl(fc)) {
2384 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2385 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2386 stats->ctrl[CONTROL_BACK_REQ]++;
2387 break;
2388 case cpu_to_le16(IEEE80211_STYPE_BACK):
2389 stats->ctrl[CONTROL_BACK]++;
2390 break;
2391 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2392 stats->ctrl[CONTROL_PSPOLL]++;
2393 break;
2394 case cpu_to_le16(IEEE80211_STYPE_RTS):
2395 stats->ctrl[CONTROL_RTS]++;
2396 break;
2397 case cpu_to_le16(IEEE80211_STYPE_CTS):
2398 stats->ctrl[CONTROL_CTS]++;
2399 break;
2400 case cpu_to_le16(IEEE80211_STYPE_ACK):
2401 stats->ctrl[CONTROL_ACK]++;
2402 break;
2403 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2404 stats->ctrl[CONTROL_CFEND]++;
2405 break;
2406 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2407 stats->ctrl[CONTROL_CFENDACK]++;
2408 break;
2409 }
2410 } else {
2411 /* data */
2412 stats->data_cnt++;
2413 stats->data_bytes += len;
2414 }
2415 iwl_leds_background(priv);
2416 }
2417 EXPORT_SYMBOL(iwl_update_stats);
2418 #endif
2419
2420 static const char *get_csr_string(int cmd)
2421 {
2422 switch (cmd) {
2423 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2424 IWL_CMD(CSR_INT_COALESCING);
2425 IWL_CMD(CSR_INT);
2426 IWL_CMD(CSR_INT_MASK);
2427 IWL_CMD(CSR_FH_INT_STATUS);
2428 IWL_CMD(CSR_GPIO_IN);
2429 IWL_CMD(CSR_RESET);
2430 IWL_CMD(CSR_GP_CNTRL);
2431 IWL_CMD(CSR_HW_REV);
2432 IWL_CMD(CSR_EEPROM_REG);
2433 IWL_CMD(CSR_EEPROM_GP);
2434 IWL_CMD(CSR_OTP_GP_REG);
2435 IWL_CMD(CSR_GIO_REG);
2436 IWL_CMD(CSR_GP_UCODE_REG);
2437 IWL_CMD(CSR_GP_DRIVER_REG);
2438 IWL_CMD(CSR_UCODE_DRV_GP1);
2439 IWL_CMD(CSR_UCODE_DRV_GP2);
2440 IWL_CMD(CSR_LED_REG);
2441 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2442 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2443 IWL_CMD(CSR_ANA_PLL_CFG);
2444 IWL_CMD(CSR_HW_REV_WA_REG);
2445 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2446 default:
2447 return "UNKNOWN";
2448
2449 }
2450 }
2451
2452 void iwl_dump_csr(struct iwl_priv *priv)
2453 {
2454 int i;
2455 u32 csr_tbl[] = {
2456 CSR_HW_IF_CONFIG_REG,
2457 CSR_INT_COALESCING,
2458 CSR_INT,
2459 CSR_INT_MASK,
2460 CSR_FH_INT_STATUS,
2461 CSR_GPIO_IN,
2462 CSR_RESET,
2463 CSR_GP_CNTRL,
2464 CSR_HW_REV,
2465 CSR_EEPROM_REG,
2466 CSR_EEPROM_GP,
2467 CSR_OTP_GP_REG,
2468 CSR_GIO_REG,
2469 CSR_GP_UCODE_REG,
2470 CSR_GP_DRIVER_REG,
2471 CSR_UCODE_DRV_GP1,
2472 CSR_UCODE_DRV_GP2,
2473 CSR_LED_REG,
2474 CSR_DRAM_INT_TBL_REG,
2475 CSR_GIO_CHICKEN_BITS,
2476 CSR_ANA_PLL_CFG,
2477 CSR_HW_REV_WA_REG,
2478 CSR_DBG_HPET_MEM_REG
2479 };
2480 IWL_ERR(priv, "CSR values:\n");
2481 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2482 "CSR_INT_PERIODIC_REG)\n");
2483 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2484 IWL_ERR(priv, " %25s: 0X%08x\n",
2485 get_csr_string(csr_tbl[i]),
2486 iwl_read32(priv, csr_tbl[i]));
2487 }
2488 }
2489 EXPORT_SYMBOL(iwl_dump_csr);
2490
2491 static const char *get_fh_string(int cmd)
2492 {
2493 switch (cmd) {
2494 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2495 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2496 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2497 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2498 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2499 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2500 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2501 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2502 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2503 default:
2504 return "UNKNOWN";
2505
2506 }
2507 }
2508
2509 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2510 {
2511 int i;
2512 #ifdef CONFIG_IWLWIFI_DEBUG
2513 int pos = 0;
2514 size_t bufsz = 0;
2515 #endif
2516 u32 fh_tbl[] = {
2517 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2518 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2519 FH_RSCSR_CHNL0_WPTR,
2520 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2521 FH_MEM_RSSR_SHARED_CTRL_REG,
2522 FH_MEM_RSSR_RX_STATUS_REG,
2523 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2524 FH_TSSR_TX_STATUS_REG,
2525 FH_TSSR_TX_ERROR_REG
2526 };
2527 #ifdef CONFIG_IWLWIFI_DEBUG
2528 if (display) {
2529 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2530 *buf = kmalloc(bufsz, GFP_KERNEL);
2531 if (!*buf)
2532 return -ENOMEM;
2533 pos += scnprintf(*buf + pos, bufsz - pos,
2534 "FH register values:\n");
2535 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2536 pos += scnprintf(*buf + pos, bufsz - pos,
2537 " %34s: 0X%08x\n",
2538 get_fh_string(fh_tbl[i]),
2539 iwl_read_direct32(priv, fh_tbl[i]));
2540 }
2541 return pos;
2542 }
2543 #endif
2544 IWL_ERR(priv, "FH register values:\n");
2545 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2546 IWL_ERR(priv, " %34s: 0X%08x\n",
2547 get_fh_string(fh_tbl[i]),
2548 iwl_read_direct32(priv, fh_tbl[i]));
2549 }
2550 return 0;
2551 }
2552 EXPORT_SYMBOL(iwl_dump_fh);
2553
2554 static void iwl_force_rf_reset(struct iwl_priv *priv)
2555 {
2556 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2557 return;
2558
2559 if (!iwl_is_associated(priv)) {
2560 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2561 return;
2562 }
2563 /*
2564 * There is no easy and better way to force reset the radio,
2565 * the only known method is switching channel which will force to
2566 * reset and tune the radio.
2567 * Use internal short scan (single channel) operation to should
2568 * achieve this objective.
2569 * Driver should reset the radio when number of consecutive missed
2570 * beacon, or any other uCode error condition detected.
2571 */
2572 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2573 iwl_internal_short_hw_scan(priv);
2574 }
2575
2576
2577 int iwl_force_reset(struct iwl_priv *priv, int mode)
2578 {
2579 struct iwl_force_reset *force_reset;
2580
2581 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2582 return -EINVAL;
2583
2584 if (mode >= IWL_MAX_FORCE_RESET) {
2585 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2586 return -EINVAL;
2587 }
2588 force_reset = &priv->force_reset[mode];
2589 force_reset->reset_request_count++;
2590 if (force_reset->last_force_reset_jiffies &&
2591 time_after(force_reset->last_force_reset_jiffies +
2592 force_reset->reset_duration, jiffies)) {
2593 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2594 force_reset->reset_reject_count++;
2595 return -EAGAIN;
2596 }
2597 force_reset->reset_success_count++;
2598 force_reset->last_force_reset_jiffies = jiffies;
2599 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2600 switch (mode) {
2601 case IWL_RF_RESET:
2602 iwl_force_rf_reset(priv);
2603 break;
2604 case IWL_FW_RESET:
2605 IWL_ERR(priv, "On demand firmware reload\n");
2606 /* Set the FW error flag -- cleared on iwl_down */
2607 set_bit(STATUS_FW_ERROR, &priv->status);
2608 wake_up_interruptible(&priv->wait_command_queue);
2609 /*
2610 * Keep the restart process from trying to send host
2611 * commands by clearing the INIT status bit
2612 */
2613 clear_bit(STATUS_READY, &priv->status);
2614 queue_work(priv->workqueue, &priv->restart);
2615 break;
2616 }
2617 return 0;
2618 }
2619 EXPORT_SYMBOL(iwl_force_reset);
2620
2621 /**
2622 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2623 *
2624 * During normal condition (no queue is stuck), the timer is continually set to
2625 * execute every monitor_recover_period milliseconds after the last timer
2626 * expired. When the queue read_ptr is at the same place, the timer is
2627 * shorten to 100mSecs. This is
2628 * 1) to reduce the chance that the read_ptr may wrap around (not stuck)
2629 * 2) to detect the stuck queues quicker before the station and AP can
2630 * disassociate each other.
2631 *
2632 * This function monitors all the tx queues and recover from it if any
2633 * of the queues are stuck.
2634 * 1. It first check the cmd queue for stuck conditions. If it is stuck,
2635 * it will recover by resetting the firmware and return.
2636 * 2. Then, it checks for station association. If it associates it will check
2637 * other queues. If any queue is stuck, it will recover by resetting
2638 * the firmware.
2639 * Note: It the number of times the queue read_ptr to be at the same place to
2640 * be MAX_REPEAT+1 in order to consider to be stuck.
2641 */
2642 /*
2643 * The maximum number of times the read pointer of the tx queue at the
2644 * same place without considering to be stuck.
2645 */
2646 #define MAX_REPEAT (2)
2647 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2648 {
2649 struct iwl_tx_queue *txq;
2650 struct iwl_queue *q;
2651
2652 txq = &priv->txq[cnt];
2653 q = &txq->q;
2654 /* queue is empty, skip */
2655 if (q->read_ptr != q->write_ptr) {
2656 if (q->read_ptr == q->last_read_ptr) {
2657 /* a queue has not been read from last time */
2658 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2659 IWL_ERR(priv,
2660 "queue %d stuck %d time. Fw reload.\n",
2661 q->id, q->repeat_same_read_ptr);
2662 q->repeat_same_read_ptr = 0;
2663 iwl_force_reset(priv, IWL_FW_RESET);
2664 } else {
2665 q->repeat_same_read_ptr++;
2666 IWL_DEBUG_RADIO(priv,
2667 "queue %d, not read %d time\n",
2668 q->id,
2669 q->repeat_same_read_ptr);
2670 mod_timer(&priv->monitor_recover, jiffies +
2671 msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2672 }
2673 return 1;
2674 } else {
2675 q->last_read_ptr = q->read_ptr;
2676 q->repeat_same_read_ptr = 0;
2677 }
2678 }
2679 return 0;
2680 }
2681
2682 void iwl_bg_monitor_recover(unsigned long data)
2683 {
2684 struct iwl_priv *priv = (struct iwl_priv *)data;
2685 int cnt;
2686
2687 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2688 return;
2689
2690 /* monitor and check for stuck cmd queue */
2691 if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2692 return;
2693
2694 /* monitor and check for other stuck queues */
2695 if (iwl_is_associated(priv)) {
2696 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2697 /* skip as we already checked the command queue */
2698 if (cnt == IWL_CMD_QUEUE_NUM)
2699 continue;
2700 if (iwl_check_stuck_queue(priv, cnt))
2701 return;
2702 }
2703 }
2704 /*
2705 * Reschedule the timer to occur in
2706 * priv->cfg->monitor_recover_period
2707 */
2708 mod_timer(&priv->monitor_recover,
2709 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2710 }
2711 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2712
2713 #ifdef CONFIG_PM
2714
2715 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2716 {
2717 struct iwl_priv *priv = pci_get_drvdata(pdev);
2718
2719 /*
2720 * This function is called when system goes into suspend state
2721 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2722 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2723 * it will not call apm_ops.stop() to stop the DMA operation.
2724 * Calling apm_ops.stop here to make sure we stop the DMA.
2725 */
2726 priv->cfg->ops->lib->apm_ops.stop(priv);
2727
2728 pci_save_state(pdev);
2729 pci_disable_device(pdev);
2730 pci_set_power_state(pdev, PCI_D3hot);
2731
2732 return 0;
2733 }
2734 EXPORT_SYMBOL(iwl_pci_suspend);
2735
2736 int iwl_pci_resume(struct pci_dev *pdev)
2737 {
2738 struct iwl_priv *priv = pci_get_drvdata(pdev);
2739 int ret;
2740
2741 /*
2742 * We disable the RETRY_TIMEOUT register (0x41) to keep
2743 * PCI Tx retries from interfering with C3 CPU state.
2744 */
2745 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2746
2747 pci_set_power_state(pdev, PCI_D0);
2748 ret = pci_enable_device(pdev);
2749 if (ret)
2750 return ret;
2751 pci_restore_state(pdev);
2752 iwl_enable_interrupts(priv);
2753
2754 return 0;
2755 }
2756 EXPORT_SYMBOL(iwl_pci_resume);
2757
2758 #endif /* CONFIG_PM */
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