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iwlwifi: wimax co-exist code clean up
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob0c3b9846aa522688a67220004affe144bd791e06
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 <net/mac80211.h>
34
35 #include "iwl-eeprom.h"
36 #include "iwl-dev.h" /* FIXME: remove */
37 #include "iwl-debug.h"
38 #include "iwl-core.h"
39 #include "iwl-io.h"
40 #include "iwl-power.h"
41 #include "iwl-sta.h"
42 #include "iwl-helpers.h"
43
44
45 MODULE_DESCRIPTION("iwl core");
46 MODULE_VERSION(IWLWIFI_VERSION);
47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
48 MODULE_LICENSE("GPL");
49
50 /*
51 * set bt_coex_active to true, uCode will do kill/defer
52 * every time the priority line is asserted (BT is sending signals on the
53 * priority line in the PCIx).
54 * set bt_coex_active to false, uCode will ignore the BT activity and
55 * perform the normal operation
56 *
57 * User might experience transmit issue on some platform due to WiFi/BT
58 * co-exist problem. The possible behaviors are:
59 * Able to scan and finding all the available AP
60 * Not able to associate with any AP
61 * On those platforms, WiFi communication can be restored by set
62 * "bt_coex_active" module parameter to "false"
63 *
64 * default: bt_coex_active = true (BT_COEX_ENABLE)
65 */
66 static bool bt_coex_active = true;
67 module_param(bt_coex_active, bool, S_IRUGO);
68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
69
70 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
71 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
72 IWL_RATE_SISO_##s##M_PLCP, \
73 IWL_RATE_MIMO2_##s##M_PLCP,\
74 IWL_RATE_MIMO3_##s##M_PLCP,\
75 IWL_RATE_##r##M_IEEE, \
76 IWL_RATE_##ip##M_INDEX, \
77 IWL_RATE_##in##M_INDEX, \
78 IWL_RATE_##rp##M_INDEX, \
79 IWL_RATE_##rn##M_INDEX, \
80 IWL_RATE_##pp##M_INDEX, \
81 IWL_RATE_##np##M_INDEX }
82
83 u32 iwl_debug_level;
84 EXPORT_SYMBOL(iwl_debug_level);
85
86 /*
87 * Parameter order:
88 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
89 *
90 * If there isn't a valid next or previous rate then INV is used which
91 * maps to IWL_RATE_INVALID
92 *
93 */
94 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
95 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
96 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
97 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
98 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
99 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
100 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
101 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
102 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
103 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
104 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
105 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
106 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
107 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
108 /* FIXME:RS: ^^ should be INV (legacy) */
109 };
110 EXPORT_SYMBOL(iwl_rates);
111
112 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
113 {
114 int idx = 0;
115
116 /* HT rate format */
117 if (rate_n_flags & RATE_MCS_HT_MSK) {
118 idx = (rate_n_flags & 0xff);
119
120 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
121 idx = idx - IWL_RATE_MIMO3_6M_PLCP;
122 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
123 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
124
125 idx += IWL_FIRST_OFDM_RATE;
126 /* skip 9M not supported in ht*/
127 if (idx >= IWL_RATE_9M_INDEX)
128 idx += 1;
129 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
130 return idx;
131
132 /* legacy rate format, search for match in table */
133 } else {
134 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
135 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
136 return idx;
137 }
138
139 return -1;
140 }
141 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
142
143 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
144 {
145 int i;
146 u8 ind = ant;
147 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
148 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
149 if (priv->hw_params.valid_tx_ant & BIT(ind))
150 return ind;
151 }
152 return ant;
153 }
154 EXPORT_SYMBOL(iwl_toggle_tx_ant);
155
156 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
157 EXPORT_SYMBOL(iwl_bcast_addr);
158
159
160 /* This function both allocates and initializes hw and priv. */
161 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
162 struct ieee80211_ops *hw_ops)
163 {
164 struct iwl_priv *priv;
165
166 /* mac80211 allocates memory for this device instance, including
167 * space for this driver's private structure */
168 struct ieee80211_hw *hw =
169 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
170 if (hw == NULL) {
171 printk(KERN_ERR "%s: Can not allocate network device\n",
172 cfg->name);
173 goto out;
174 }
175
176 priv = hw->priv;
177 priv->hw = hw;
178
179 out:
180 return hw;
181 }
182 EXPORT_SYMBOL(iwl_alloc_all);
183
184 void iwl_hw_detect(struct iwl_priv *priv)
185 {
186 priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
187 priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
188 pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
189 }
190 EXPORT_SYMBOL(iwl_hw_detect);
191
192 /*
193 * QoS support
194 */
195 static void iwl_update_qos(struct iwl_priv *priv)
196 {
197 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
198 return;
199
200 priv->qos_data.def_qos_parm.qos_flags = 0;
201
202 if (priv->qos_data.qos_active)
203 priv->qos_data.def_qos_parm.qos_flags |=
204 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
205
206 if (priv->current_ht_config.is_ht)
207 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
208
209 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
210 priv->qos_data.qos_active,
211 priv->qos_data.def_qos_parm.qos_flags);
212
213 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
214 sizeof(struct iwl_qosparam_cmd),
215 &priv->qos_data.def_qos_parm, NULL);
216 }
217
218 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
219 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
220 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
221 struct ieee80211_sta_ht_cap *ht_info,
222 enum ieee80211_band band)
223 {
224 u16 max_bit_rate = 0;
225 u8 rx_chains_num = priv->hw_params.rx_chains_num;
226 u8 tx_chains_num = priv->hw_params.tx_chains_num;
227
228 ht_info->cap = 0;
229 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
230
231 ht_info->ht_supported = true;
232
233 if (priv->cfg->ht_greenfield_support)
234 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
235 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
236 max_bit_rate = MAX_BIT_RATE_20_MHZ;
237 if (priv->hw_params.ht40_channel & BIT(band)) {
238 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
239 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
240 ht_info->mcs.rx_mask[4] = 0x01;
241 max_bit_rate = MAX_BIT_RATE_40_MHZ;
242 }
243
244 if (priv->cfg->mod_params->amsdu_size_8K)
245 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
246
247 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
248 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
249
250 ht_info->mcs.rx_mask[0] = 0xFF;
251 if (rx_chains_num >= 2)
252 ht_info->mcs.rx_mask[1] = 0xFF;
253 if (rx_chains_num >= 3)
254 ht_info->mcs.rx_mask[2] = 0xFF;
255
256 /* Highest supported Rx data rate */
257 max_bit_rate *= rx_chains_num;
258 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
259 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
260
261 /* Tx MCS capabilities */
262 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
263 if (tx_chains_num != rx_chains_num) {
264 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
265 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
266 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
267 }
268 }
269
270 /**
271 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
272 */
273 int iwlcore_init_geos(struct iwl_priv *priv)
274 {
275 struct iwl_channel_info *ch;
276 struct ieee80211_supported_band *sband;
277 struct ieee80211_channel *channels;
278 struct ieee80211_channel *geo_ch;
279 struct ieee80211_rate *rates;
280 int i = 0;
281
282 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
283 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
284 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
285 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
286 return 0;
287 }
288
289 channels = kzalloc(sizeof(struct ieee80211_channel) *
290 priv->channel_count, GFP_KERNEL);
291 if (!channels)
292 return -ENOMEM;
293
294 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
295 GFP_KERNEL);
296 if (!rates) {
297 kfree(channels);
298 return -ENOMEM;
299 }
300
301 /* 5.2GHz channels start after the 2.4GHz channels */
302 sband = &priv->bands[IEEE80211_BAND_5GHZ];
303 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
304 /* just OFDM */
305 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
306 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
307
308 if (priv->cfg->sku & IWL_SKU_N)
309 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
310 IEEE80211_BAND_5GHZ);
311
312 sband = &priv->bands[IEEE80211_BAND_2GHZ];
313 sband->channels = channels;
314 /* OFDM & CCK */
315 sband->bitrates = rates;
316 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
317
318 if (priv->cfg->sku & IWL_SKU_N)
319 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
320 IEEE80211_BAND_2GHZ);
321
322 priv->ieee_channels = channels;
323 priv->ieee_rates = rates;
324
325 for (i = 0; i < priv->channel_count; i++) {
326 ch = &priv->channel_info[i];
327
328 /* FIXME: might be removed if scan is OK */
329 if (!is_channel_valid(ch))
330 continue;
331
332 if (is_channel_a_band(ch))
333 sband = &priv->bands[IEEE80211_BAND_5GHZ];
334 else
335 sband = &priv->bands[IEEE80211_BAND_2GHZ];
336
337 geo_ch = &sband->channels[sband->n_channels++];
338
339 geo_ch->center_freq =
340 ieee80211_channel_to_frequency(ch->channel);
341 geo_ch->max_power = ch->max_power_avg;
342 geo_ch->max_antenna_gain = 0xff;
343 geo_ch->hw_value = ch->channel;
344
345 if (is_channel_valid(ch)) {
346 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
347 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
348
349 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
350 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
351
352 if (ch->flags & EEPROM_CHANNEL_RADAR)
353 geo_ch->flags |= IEEE80211_CHAN_RADAR;
354
355 geo_ch->flags |= ch->ht40_extension_channel;
356
357 if (ch->max_power_avg > priv->tx_power_device_lmt)
358 priv->tx_power_device_lmt = ch->max_power_avg;
359 } else {
360 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
361 }
362
363 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
364 ch->channel, geo_ch->center_freq,
365 is_channel_a_band(ch) ? "5.2" : "2.4",
366 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
367 "restricted" : "valid",
368 geo_ch->flags);
369 }
370
371 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
372 priv->cfg->sku & IWL_SKU_A) {
373 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
374 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
375 priv->pci_dev->device,
376 priv->pci_dev->subsystem_device);
377 priv->cfg->sku &= ~IWL_SKU_A;
378 }
379
380 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
381 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
382 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
383
384 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
385
386 return 0;
387 }
388 EXPORT_SYMBOL(iwlcore_init_geos);
389
390 /*
391 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
392 */
393 void iwlcore_free_geos(struct iwl_priv *priv)
394 {
395 kfree(priv->ieee_channels);
396 kfree(priv->ieee_rates);
397 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
398 }
399 EXPORT_SYMBOL(iwlcore_free_geos);
400
401 /*
402 * iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
403 * function.
404 */
405 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
406 __le32 *tx_flags)
407 {
408 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
409 *tx_flags |= TX_CMD_FLG_RTS_MSK;
410 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
411 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
412 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
413 *tx_flags |= TX_CMD_FLG_CTS_MSK;
414 }
415 }
416 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
417
418 static bool is_single_rx_stream(struct iwl_priv *priv)
419 {
420 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
421 priv->current_ht_config.single_chain_sufficient;
422 }
423
424 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
425 enum ieee80211_band band,
426 u16 channel, u8 extension_chan_offset)
427 {
428 const struct iwl_channel_info *ch_info;
429
430 ch_info = iwl_get_channel_info(priv, band, channel);
431 if (!is_channel_valid(ch_info))
432 return 0;
433
434 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
435 return !(ch_info->ht40_extension_channel &
436 IEEE80211_CHAN_NO_HT40PLUS);
437 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
438 return !(ch_info->ht40_extension_channel &
439 IEEE80211_CHAN_NO_HT40MINUS);
440
441 return 0;
442 }
443
444 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
445 struct ieee80211_sta_ht_cap *sta_ht_inf)
446 {
447 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
448
449 if (!ht_conf->is_ht || !ht_conf->is_40mhz)
450 return 0;
451
452 /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
453 * the bit will not set if it is pure 40MHz case
454 */
455 if (sta_ht_inf) {
456 if (!sta_ht_inf->ht_supported)
457 return 0;
458 }
459 #ifdef CONFIG_IWLWIFI_DEBUG
460 if (priv->disable_ht40)
461 return 0;
462 #endif
463 return iwl_is_channel_extension(priv, priv->band,
464 le16_to_cpu(priv->staging_rxon.channel),
465 ht_conf->extension_chan_offset);
466 }
467 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
468
469 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
470 {
471 u16 new_val = 0;
472 u16 beacon_factor = 0;
473
474 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
475 new_val = beacon_val / beacon_factor;
476
477 if (!new_val)
478 new_val = max_beacon_val;
479
480 return new_val;
481 }
482
483 void iwl_setup_rxon_timing(struct iwl_priv *priv)
484 {
485 u64 tsf;
486 s32 interval_tm, rem;
487 unsigned long flags;
488 struct ieee80211_conf *conf = NULL;
489 u16 beacon_int;
490
491 conf = ieee80211_get_hw_conf(priv->hw);
492
493 spin_lock_irqsave(&priv->lock, flags);
494 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
495 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
496
497 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
498 beacon_int = priv->beacon_int;
499 priv->rxon_timing.atim_window = 0;
500 } else {
501 beacon_int = priv->vif->bss_conf.beacon_int;
502
503 /* TODO: we need to get atim_window from upper stack
504 * for now we set to 0 */
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 return;
741 }
742 EXPORT_SYMBOL(iwl_set_rxon_ht);
743
744 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
745 #define IWL_NUM_RX_CHAINS_SINGLE 2
746 #define IWL_NUM_IDLE_CHAINS_DUAL 2
747 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
748
749 /*
750 * Determine how many receiver/antenna chains to use.
751 *
752 * More provides better reception via diversity. Fewer saves power
753 * at the expense of throughput, but only when not in powersave to
754 * start with.
755 *
756 * MIMO (dual stream) requires at least 2, but works better with 3.
757 * This does not determine *which* chains to use, just how many.
758 */
759 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
760 {
761 /* # of Rx chains to use when expecting MIMO. */
762 if (is_single_rx_stream(priv))
763 return IWL_NUM_RX_CHAINS_SINGLE;
764 else
765 return IWL_NUM_RX_CHAINS_MULTIPLE;
766 }
767
768 /*
769 * When we are in power saving mode, unless device support spatial
770 * multiplexing power save, use the active count for rx chain count.
771 */
772 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
773 {
774 /* # Rx chains when idling, depending on SMPS mode */
775 switch (priv->current_ht_config.smps) {
776 case IEEE80211_SMPS_STATIC:
777 case IEEE80211_SMPS_DYNAMIC:
778 return IWL_NUM_IDLE_CHAINS_SINGLE;
779 case IEEE80211_SMPS_OFF:
780 return active_cnt;
781 default:
782 WARN(1, "invalid SMPS mode %d",
783 priv->current_ht_config.smps);
784 return active_cnt;
785 }
786 }
787
788 /* up to 4 chains */
789 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
790 {
791 u8 res;
792 res = (chain_bitmap & BIT(0)) >> 0;
793 res += (chain_bitmap & BIT(1)) >> 1;
794 res += (chain_bitmap & BIT(2)) >> 2;
795 res += (chain_bitmap & BIT(3)) >> 3;
796 return res;
797 }
798
799 /**
800 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
801 *
802 * Selects how many and which Rx receivers/antennas/chains to use.
803 * This should not be used for scan command ... it puts data in wrong place.
804 */
805 void iwl_set_rxon_chain(struct iwl_priv *priv)
806 {
807 bool is_single = is_single_rx_stream(priv);
808 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
809 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
810 u32 active_chains;
811 u16 rx_chain;
812
813 /* Tell uCode which antennas are actually connected.
814 * Before first association, we assume all antennas are connected.
815 * Just after first association, iwl_chain_noise_calibration()
816 * checks which antennas actually *are* connected. */
817 if (priv->chain_noise_data.active_chains)
818 active_chains = priv->chain_noise_data.active_chains;
819 else
820 active_chains = priv->hw_params.valid_rx_ant;
821
822 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
823
824 /* How many receivers should we use? */
825 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
826 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
827
828
829 /* correct rx chain count according hw settings
830 * and chain noise calibration
831 */
832 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
833 if (valid_rx_cnt < active_rx_cnt)
834 active_rx_cnt = valid_rx_cnt;
835
836 if (valid_rx_cnt < idle_rx_cnt)
837 idle_rx_cnt = valid_rx_cnt;
838
839 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
840 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
841
842 priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
843
844 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
845 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
846 else
847 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
848
849 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
850 priv->staging_rxon.rx_chain,
851 active_rx_cnt, idle_rx_cnt);
852
853 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
854 active_rx_cnt < idle_rx_cnt);
855 }
856 EXPORT_SYMBOL(iwl_set_rxon_chain);
857
858 /**
859 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
860 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
861 * @channel: Any channel valid for the requested phymode
862
863 * In addition to setting the staging RXON, priv->phymode is also set.
864 *
865 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
866 * in the staging RXON flag structure based on the phymode
867 */
868 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
869 {
870 enum ieee80211_band band = ch->band;
871 u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
872
873 if (!iwl_get_channel_info(priv, band, channel)) {
874 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
875 channel, band);
876 return -EINVAL;
877 }
878
879 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
880 (priv->band == band))
881 return 0;
882
883 priv->staging_rxon.channel = cpu_to_le16(channel);
884 if (band == IEEE80211_BAND_5GHZ)
885 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
886 else
887 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
888
889 priv->band = band;
890
891 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
892
893 return 0;
894 }
895 EXPORT_SYMBOL(iwl_set_rxon_channel);
896
897 void iwl_set_flags_for_band(struct iwl_priv *priv,
898 enum ieee80211_band band)
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 (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
908 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
909 else
910 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
911
912 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
913 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
914
915 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
916 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
917 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
918 }
919 }
920
921 /*
922 * initialize rxon structure with default values from eeprom
923 */
924 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
925 {
926 const struct iwl_channel_info *ch_info;
927
928 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
929
930 switch (mode) {
931 case NL80211_IFTYPE_AP:
932 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
933 break;
934
935 case NL80211_IFTYPE_STATION:
936 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
937 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
938 break;
939
940 case NL80211_IFTYPE_ADHOC:
941 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
942 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
943 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
944 RXON_FILTER_ACCEPT_GRP_MSK;
945 break;
946
947 default:
948 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
949 break;
950 }
951
952 #if 0
953 /* TODO: Figure out when short_preamble would be set and cache from
954 * that */
955 if (!hw_to_local(priv->hw)->short_preamble)
956 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
957 else
958 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
959 #endif
960
961 ch_info = iwl_get_channel_info(priv, priv->band,
962 le16_to_cpu(priv->active_rxon.channel));
963
964 if (!ch_info)
965 ch_info = &priv->channel_info[0];
966
967 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
968 priv->band = ch_info->band;
969
970 iwl_set_flags_for_band(priv, priv->band);
971
972 priv->staging_rxon.ofdm_basic_rates =
973 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
974 priv->staging_rxon.cck_basic_rates =
975 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
976
977 /* clear both MIX and PURE40 mode flag */
978 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
979 RXON_FLG_CHANNEL_MODE_PURE_40);
980 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
981 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
982 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
983 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
984 priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
985 }
986 EXPORT_SYMBOL(iwl_connection_init_rx_config);
987
988 static void iwl_set_rate(struct iwl_priv *priv)
989 {
990 const struct ieee80211_supported_band *hw = NULL;
991 struct ieee80211_rate *rate;
992 int i;
993
994 hw = iwl_get_hw_mode(priv, priv->band);
995 if (!hw) {
996 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
997 return;
998 }
999
1000 priv->active_rate = 0;
1001
1002 for (i = 0; i < hw->n_bitrates; i++) {
1003 rate = &(hw->bitrates[i]);
1004 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1005 priv->active_rate |= (1 << rate->hw_value);
1006 }
1007
1008 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1009
1010 priv->staging_rxon.cck_basic_rates =
1011 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1012
1013 priv->staging_rxon.ofdm_basic_rates =
1014 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1015 }
1016
1017 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1018 {
1019 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1020 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1021 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1022
1023 if (priv->switch_rxon.switch_in_progress) {
1024 if (!le32_to_cpu(csa->status) &&
1025 (csa->channel == priv->switch_rxon.channel)) {
1026 rxon->channel = csa->channel;
1027 priv->staging_rxon.channel = csa->channel;
1028 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1029 le16_to_cpu(csa->channel));
1030 } else
1031 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1032 le16_to_cpu(csa->channel));
1033
1034 priv->switch_rxon.switch_in_progress = false;
1035 }
1036 }
1037 EXPORT_SYMBOL(iwl_rx_csa);
1038
1039 #ifdef CONFIG_IWLWIFI_DEBUG
1040 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1041 {
1042 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1043
1044 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1045 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1046 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1047 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1048 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1049 le32_to_cpu(rxon->filter_flags));
1050 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1051 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1052 rxon->ofdm_basic_rates);
1053 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1054 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1055 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1056 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1057 }
1058 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1059 #endif
1060 /**
1061 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1062 */
1063 void iwl_irq_handle_error(struct iwl_priv *priv)
1064 {
1065 /* Set the FW error flag -- cleared on iwl_down */
1066 set_bit(STATUS_FW_ERROR, &priv->status);
1067
1068 /* Cancel currently queued command. */
1069 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1070
1071 priv->cfg->ops->lib->dump_nic_error_log(priv);
1072 if (priv->cfg->ops->lib->dump_csr)
1073 priv->cfg->ops->lib->dump_csr(priv);
1074 if (priv->cfg->ops->lib->dump_fh)
1075 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1076 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1077 #ifdef CONFIG_IWLWIFI_DEBUG
1078 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1079 iwl_print_rx_config_cmd(priv);
1080 #endif
1081
1082 wake_up_interruptible(&priv->wait_command_queue);
1083
1084 /* Keep the restart process from trying to send host
1085 * commands by clearing the INIT status bit */
1086 clear_bit(STATUS_READY, &priv->status);
1087
1088 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1089 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1090 "Restarting adapter due to uCode error.\n");
1091
1092 if (priv->cfg->mod_params->restart_fw)
1093 queue_work(priv->workqueue, &priv->restart);
1094 }
1095 }
1096 EXPORT_SYMBOL(iwl_irq_handle_error);
1097
1098 static int iwl_apm_stop_master(struct iwl_priv *priv)
1099 {
1100 int ret = 0;
1101
1102 /* stop device's busmaster DMA activity */
1103 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1104
1105 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1106 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1107 if (ret)
1108 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1109
1110 IWL_DEBUG_INFO(priv, "stop master\n");
1111
1112 return ret;
1113 }
1114
1115 void iwl_apm_stop(struct iwl_priv *priv)
1116 {
1117 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1118
1119 /* Stop device's DMA activity */
1120 iwl_apm_stop_master(priv);
1121
1122 /* Reset the entire device */
1123 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1124
1125 udelay(10);
1126
1127 /*
1128 * Clear "initialization complete" bit to move adapter from
1129 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1130 */
1131 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1132 }
1133 EXPORT_SYMBOL(iwl_apm_stop);
1134
1135
1136 /*
1137 * Start up NIC's basic functionality after it has been reset
1138 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1139 * NOTE: This does not load uCode nor start the embedded processor
1140 */
1141 int iwl_apm_init(struct iwl_priv *priv)
1142 {
1143 int ret = 0;
1144 u16 lctl;
1145
1146 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1147
1148 /*
1149 * Use "set_bit" below rather than "write", to preserve any hardware
1150 * bits already set by default after reset.
1151 */
1152
1153 /* Disable L0S exit timer (platform NMI Work/Around) */
1154 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1155 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1156
1157 /*
1158 * Disable L0s without affecting L1;
1159 * don't wait for ICH L0s (ICH bug W/A)
1160 */
1161 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1162 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1163
1164 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1165 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1166
1167 /*
1168 * Enable HAP INTA (interrupt from management bus) to
1169 * wake device's PCI Express link L1a -> L0s
1170 * NOTE: This is no-op for 3945 (non-existant bit)
1171 */
1172 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1173 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1174
1175 /*
1176 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1177 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1178 * If so (likely), disable L0S, so device moves directly L0->L1;
1179 * costs negligible amount of power savings.
1180 * If not (unlikely), enable L0S, so there is at least some
1181 * power savings, even without L1.
1182 */
1183 if (priv->cfg->set_l0s) {
1184 lctl = iwl_pcie_link_ctl(priv);
1185 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1186 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1187 /* L1-ASPM enabled; disable(!) L0S */
1188 iwl_set_bit(priv, CSR_GIO_REG,
1189 CSR_GIO_REG_VAL_L0S_ENABLED);
1190 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1191 } else {
1192 /* L1-ASPM disabled; enable(!) L0S */
1193 iwl_clear_bit(priv, CSR_GIO_REG,
1194 CSR_GIO_REG_VAL_L0S_ENABLED);
1195 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1196 }
1197 }
1198
1199 /* Configure analog phase-lock-loop before activating to D0A */
1200 if (priv->cfg->pll_cfg_val)
1201 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1202
1203 /*
1204 * Set "initialization complete" bit to move adapter from
1205 * D0U* --> D0A* (powered-up active) state.
1206 */
1207 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1208
1209 /*
1210 * Wait for clock stabilization; once stabilized, access to
1211 * device-internal resources is supported, e.g. iwl_write_prph()
1212 * and accesses to uCode SRAM.
1213 */
1214 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1215 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1216 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1217 if (ret < 0) {
1218 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1219 goto out;
1220 }
1221
1222 /*
1223 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1224 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1225 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1226 * and don't need BSM to restore data after power-saving sleep.
1227 *
1228 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1229 * do not disable clocks. This preserves any hardware bits already
1230 * set by default in "CLK_CTRL_REG" after reset.
1231 */
1232 if (priv->cfg->use_bsm)
1233 iwl_write_prph(priv, APMG_CLK_EN_REG,
1234 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1235 else
1236 iwl_write_prph(priv, APMG_CLK_EN_REG,
1237 APMG_CLK_VAL_DMA_CLK_RQT);
1238 udelay(20);
1239
1240 /* Disable L1-Active */
1241 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1242 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1243
1244 out:
1245 return ret;
1246 }
1247 EXPORT_SYMBOL(iwl_apm_init);
1248
1249
1250
1251 void iwl_configure_filter(struct ieee80211_hw *hw,
1252 unsigned int changed_flags,
1253 unsigned int *total_flags,
1254 u64 multicast)
1255 {
1256 struct iwl_priv *priv = hw->priv;
1257 __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1258
1259 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1260 changed_flags, *total_flags);
1261
1262 if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1263 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1264 *filter_flags |= RXON_FILTER_PROMISC_MSK;
1265 else
1266 *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1267 }
1268 if (changed_flags & FIF_ALLMULTI) {
1269 if (*total_flags & FIF_ALLMULTI)
1270 *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1271 else
1272 *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1273 }
1274 if (changed_flags & FIF_CONTROL) {
1275 if (*total_flags & FIF_CONTROL)
1276 *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1277 else
1278 *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1279 }
1280 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1281 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1282 *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1283 else
1284 *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1285 }
1286
1287 /* We avoid iwl_commit_rxon here to commit the new filter flags
1288 * since mac80211 will call ieee80211_hw_config immediately.
1289 * (mc_list is not supported at this time). Otherwise, we need to
1290 * queue a background iwl_commit_rxon work.
1291 */
1292
1293 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1294 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1295 }
1296 EXPORT_SYMBOL(iwl_configure_filter);
1297
1298 int iwl_set_hw_params(struct iwl_priv *priv)
1299 {
1300 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1301 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1302 if (priv->cfg->mod_params->amsdu_size_8K)
1303 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1304 else
1305 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1306
1307 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1308
1309 if (priv->cfg->mod_params->disable_11n)
1310 priv->cfg->sku &= ~IWL_SKU_N;
1311
1312 /* Device-specific setup */
1313 return priv->cfg->ops->lib->set_hw_params(priv);
1314 }
1315 EXPORT_SYMBOL(iwl_set_hw_params);
1316
1317 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1318 {
1319 int ret = 0;
1320 s8 prev_tx_power = priv->tx_power_user_lmt;
1321
1322 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1323 IWL_WARN(priv,
1324 "Requested user TXPOWER %d below lower limit %d.\n",
1325 tx_power,
1326 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1327 return -EINVAL;
1328 }
1329
1330 if (tx_power > priv->tx_power_device_lmt) {
1331 IWL_WARN(priv,
1332 "Requested user TXPOWER %d above upper limit %d.\n",
1333 tx_power, priv->tx_power_device_lmt);
1334 return -EINVAL;
1335 }
1336
1337 if (priv->tx_power_user_lmt != tx_power)
1338 force = true;
1339
1340 /* if nic is not up don't send command */
1341 if (iwl_is_ready_rf(priv)) {
1342 priv->tx_power_user_lmt = tx_power;
1343 if (force && priv->cfg->ops->lib->send_tx_power)
1344 ret = priv->cfg->ops->lib->send_tx_power(priv);
1345 else if (!priv->cfg->ops->lib->send_tx_power)
1346 ret = -EOPNOTSUPP;
1347 /*
1348 * if fail to set tx_power, restore the orig. tx power
1349 */
1350 if (ret)
1351 priv->tx_power_user_lmt = prev_tx_power;
1352 }
1353
1354 /*
1355 * Even this is an async host command, the command
1356 * will always report success from uCode
1357 * So once driver can placing the command into the queue
1358 * successfully, driver can use priv->tx_power_user_lmt
1359 * to reflect the current tx power
1360 */
1361 return ret;
1362 }
1363 EXPORT_SYMBOL(iwl_set_tx_power);
1364
1365 irqreturn_t iwl_isr_legacy(int irq, void *data)
1366 {
1367 struct iwl_priv *priv = data;
1368 u32 inta, inta_mask;
1369 u32 inta_fh;
1370 unsigned long flags;
1371 if (!priv)
1372 return IRQ_NONE;
1373
1374 spin_lock_irqsave(&priv->lock, flags);
1375
1376 /* Disable (but don't clear!) interrupts here to avoid
1377 * back-to-back ISRs and sporadic interrupts from our NIC.
1378 * If we have something to service, the tasklet will re-enable ints.
1379 * If we *don't* have something, we'll re-enable before leaving here. */
1380 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1381 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1382
1383 /* Discover which interrupts are active/pending */
1384 inta = iwl_read32(priv, CSR_INT);
1385 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1386
1387 /* Ignore interrupt if there's nothing in NIC to service.
1388 * This may be due to IRQ shared with another device,
1389 * or due to sporadic interrupts thrown from our NIC. */
1390 if (!inta && !inta_fh) {
1391 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1392 goto none;
1393 }
1394
1395 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1396 /* Hardware disappeared. It might have already raised
1397 * an interrupt */
1398 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1399 goto unplugged;
1400 }
1401
1402 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1403 inta, inta_mask, inta_fh);
1404
1405 inta &= ~CSR_INT_BIT_SCD;
1406
1407 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1408 if (likely(inta || inta_fh))
1409 tasklet_schedule(&priv->irq_tasklet);
1410
1411 unplugged:
1412 spin_unlock_irqrestore(&priv->lock, flags);
1413 return IRQ_HANDLED;
1414
1415 none:
1416 /* re-enable interrupts here since we don't have anything to service. */
1417 /* only Re-enable if diabled by irq */
1418 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1419 iwl_enable_interrupts(priv);
1420 spin_unlock_irqrestore(&priv->lock, flags);
1421 return IRQ_NONE;
1422 }
1423 EXPORT_SYMBOL(iwl_isr_legacy);
1424
1425 void iwl_send_bt_config(struct iwl_priv *priv)
1426 {
1427 struct iwl_bt_cmd bt_cmd = {
1428 .lead_time = BT_LEAD_TIME_DEF,
1429 .max_kill = BT_MAX_KILL_DEF,
1430 .kill_ack_mask = 0,
1431 .kill_cts_mask = 0,
1432 };
1433
1434 if (!bt_coex_active)
1435 bt_cmd.flags = BT_COEX_DISABLE;
1436 else
1437 bt_cmd.flags = BT_COEX_ENABLE;
1438
1439 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1440 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1441
1442 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1443 sizeof(struct iwl_bt_cmd), &bt_cmd))
1444 IWL_ERR(priv, "failed to send BT Coex Config\n");
1445 }
1446 EXPORT_SYMBOL(iwl_send_bt_config);
1447
1448 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1449 {
1450 struct iwl_statistics_cmd statistics_cmd = {
1451 .configuration_flags =
1452 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1453 };
1454
1455 if (flags & CMD_ASYNC)
1456 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1457 sizeof(struct iwl_statistics_cmd),
1458 &statistics_cmd, NULL);
1459 else
1460 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1461 sizeof(struct iwl_statistics_cmd),
1462 &statistics_cmd);
1463 }
1464 EXPORT_SYMBOL(iwl_send_statistics_request);
1465
1466 /**
1467 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1468 * using sample data 100 bytes apart. If these sample points are good,
1469 * it's a pretty good bet that everything between them is good, too.
1470 */
1471 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1472 {
1473 u32 val;
1474 int ret = 0;
1475 u32 errcnt = 0;
1476 u32 i;
1477
1478 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1479
1480 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1481 /* read data comes through single port, auto-incr addr */
1482 /* NOTE: Use the debugless read so we don't flood kernel log
1483 * if IWL_DL_IO is set */
1484 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1485 i + IWL49_RTC_INST_LOWER_BOUND);
1486 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1487 if (val != le32_to_cpu(*image)) {
1488 ret = -EIO;
1489 errcnt++;
1490 if (errcnt >= 3)
1491 break;
1492 }
1493 }
1494
1495 return ret;
1496 }
1497
1498 /**
1499 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1500 * looking at all data.
1501 */
1502 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1503 u32 len)
1504 {
1505 u32 val;
1506 u32 save_len = len;
1507 int ret = 0;
1508 u32 errcnt;
1509
1510 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1511
1512 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1513 IWL49_RTC_INST_LOWER_BOUND);
1514
1515 errcnt = 0;
1516 for (; len > 0; len -= sizeof(u32), image++) {
1517 /* read data comes through single port, auto-incr addr */
1518 /* NOTE: Use the debugless read so we don't flood kernel log
1519 * if IWL_DL_IO is set */
1520 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1521 if (val != le32_to_cpu(*image)) {
1522 IWL_ERR(priv, "uCode INST section is invalid at "
1523 "offset 0x%x, is 0x%x, s/b 0x%x\n",
1524 save_len - len, val, le32_to_cpu(*image));
1525 ret = -EIO;
1526 errcnt++;
1527 if (errcnt >= 20)
1528 break;
1529 }
1530 }
1531
1532 if (!errcnt)
1533 IWL_DEBUG_INFO(priv,
1534 "ucode image in INSTRUCTION memory is good\n");
1535
1536 return ret;
1537 }
1538
1539 /**
1540 * iwl_verify_ucode - determine which instruction image is in SRAM,
1541 * and verify its contents
1542 */
1543 int iwl_verify_ucode(struct iwl_priv *priv)
1544 {
1545 __le32 *image;
1546 u32 len;
1547 int ret;
1548
1549 /* Try bootstrap */
1550 image = (__le32 *)priv->ucode_boot.v_addr;
1551 len = priv->ucode_boot.len;
1552 ret = iwlcore_verify_inst_sparse(priv, image, len);
1553 if (!ret) {
1554 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1555 return 0;
1556 }
1557
1558 /* Try initialize */
1559 image = (__le32 *)priv->ucode_init.v_addr;
1560 len = priv->ucode_init.len;
1561 ret = iwlcore_verify_inst_sparse(priv, image, len);
1562 if (!ret) {
1563 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1564 return 0;
1565 }
1566
1567 /* Try runtime/protocol */
1568 image = (__le32 *)priv->ucode_code.v_addr;
1569 len = priv->ucode_code.len;
1570 ret = iwlcore_verify_inst_sparse(priv, image, len);
1571 if (!ret) {
1572 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1573 return 0;
1574 }
1575
1576 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1577
1578 /* Since nothing seems to match, show first several data entries in
1579 * instruction SRAM, so maybe visual inspection will give a clue.
1580 * Selection of bootstrap image (vs. other images) is arbitrary. */
1581 image = (__le32 *)priv->ucode_boot.v_addr;
1582 len = priv->ucode_boot.len;
1583 ret = iwl_verify_inst_full(priv, image, len);
1584
1585 return ret;
1586 }
1587 EXPORT_SYMBOL(iwl_verify_ucode);
1588
1589
1590 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1591 {
1592 struct iwl_ct_kill_config cmd;
1593 struct iwl_ct_kill_throttling_config adv_cmd;
1594 unsigned long flags;
1595 int ret = 0;
1596
1597 spin_lock_irqsave(&priv->lock, flags);
1598 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1599 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1600 spin_unlock_irqrestore(&priv->lock, flags);
1601 priv->thermal_throttle.ct_kill_toggle = false;
1602
1603 if (priv->cfg->support_ct_kill_exit) {
1604 adv_cmd.critical_temperature_enter =
1605 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1606 adv_cmd.critical_temperature_exit =
1607 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1608
1609 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1610 sizeof(adv_cmd), &adv_cmd);
1611 if (ret)
1612 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1613 else
1614 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1615 "succeeded, "
1616 "critical temperature enter is %d,"
1617 "exit is %d\n",
1618 priv->hw_params.ct_kill_threshold,
1619 priv->hw_params.ct_kill_exit_threshold);
1620 } else {
1621 cmd.critical_temperature_R =
1622 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1623
1624 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1625 sizeof(cmd), &cmd);
1626 if (ret)
1627 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1628 else
1629 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1630 "succeeded, "
1631 "critical temperature is %d\n",
1632 priv->hw_params.ct_kill_threshold);
1633 }
1634 }
1635 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1636
1637
1638 /*
1639 * CARD_STATE_CMD
1640 *
1641 * Use: Sets the device's internal card state to enable, disable, or halt
1642 *
1643 * When in the 'enable' state the card operates as normal.
1644 * When in the 'disable' state, the card enters into a low power mode.
1645 * When in the 'halt' state, the card is shut down and must be fully
1646 * restarted to come back on.
1647 */
1648 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1649 {
1650 struct iwl_host_cmd cmd = {
1651 .id = REPLY_CARD_STATE_CMD,
1652 .len = sizeof(u32),
1653 .data = &flags,
1654 .flags = meta_flag,
1655 };
1656
1657 return iwl_send_cmd(priv, &cmd);
1658 }
1659
1660 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1661 struct iwl_rx_mem_buffer *rxb)
1662 {
1663 #ifdef CONFIG_IWLWIFI_DEBUG
1664 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1665 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1666 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1667 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1668 #endif
1669 }
1670 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1671
1672 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1673 struct iwl_rx_mem_buffer *rxb)
1674 {
1675 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1676 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1677 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1678 "notification for %s:\n", len,
1679 get_cmd_string(pkt->hdr.cmd));
1680 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1681 }
1682 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1683
1684 void iwl_rx_reply_error(struct iwl_priv *priv,
1685 struct iwl_rx_mem_buffer *rxb)
1686 {
1687 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1688
1689 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1690 "seq 0x%04X ser 0x%08X\n",
1691 le32_to_cpu(pkt->u.err_resp.error_type),
1692 get_cmd_string(pkt->u.err_resp.cmd_id),
1693 pkt->u.err_resp.cmd_id,
1694 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1695 le32_to_cpu(pkt->u.err_resp.error_info));
1696 }
1697 EXPORT_SYMBOL(iwl_rx_reply_error);
1698
1699 void iwl_clear_isr_stats(struct iwl_priv *priv)
1700 {
1701 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1702 }
1703
1704 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1705 const struct ieee80211_tx_queue_params *params)
1706 {
1707 struct iwl_priv *priv = hw->priv;
1708 unsigned long flags;
1709 int q;
1710
1711 IWL_DEBUG_MAC80211(priv, "enter\n");
1712
1713 if (!iwl_is_ready_rf(priv)) {
1714 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1715 return -EIO;
1716 }
1717
1718 if (queue >= AC_NUM) {
1719 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1720 return 0;
1721 }
1722
1723 q = AC_NUM - 1 - queue;
1724
1725 spin_lock_irqsave(&priv->lock, flags);
1726
1727 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1728 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1729 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1730 priv->qos_data.def_qos_parm.ac[q].edca_txop =
1731 cpu_to_le16((params->txop * 32));
1732
1733 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1734
1735 spin_unlock_irqrestore(&priv->lock, flags);
1736
1737 IWL_DEBUG_MAC80211(priv, "leave\n");
1738 return 0;
1739 }
1740 EXPORT_SYMBOL(iwl_mac_conf_tx);
1741
1742 static void iwl_ht_conf(struct iwl_priv *priv,
1743 struct ieee80211_bss_conf *bss_conf)
1744 {
1745 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1746 struct ieee80211_sta *sta;
1747
1748 IWL_DEBUG_MAC80211(priv, "enter:\n");
1749
1750 if (!ht_conf->is_ht)
1751 return;
1752
1753 ht_conf->ht_protection =
1754 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1755 ht_conf->non_GF_STA_present =
1756 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1757
1758 ht_conf->single_chain_sufficient = false;
1759
1760 switch (priv->iw_mode) {
1761 case NL80211_IFTYPE_STATION:
1762 rcu_read_lock();
1763 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1764 if (sta) {
1765 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1766 int maxstreams;
1767
1768 maxstreams = (ht_cap->mcs.tx_params &
1769 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1770 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1771 maxstreams += 1;
1772
1773 if ((ht_cap->mcs.rx_mask[1] == 0) &&
1774 (ht_cap->mcs.rx_mask[2] == 0))
1775 ht_conf->single_chain_sufficient = true;
1776 if (maxstreams <= 1)
1777 ht_conf->single_chain_sufficient = true;
1778 } else {
1779 /*
1780 * If at all, this can only happen through a race
1781 * when the AP disconnects us while we're still
1782 * setting up the connection, in that case mac80211
1783 * will soon tell us about that.
1784 */
1785 ht_conf->single_chain_sufficient = true;
1786 }
1787 rcu_read_unlock();
1788 break;
1789 case NL80211_IFTYPE_ADHOC:
1790 ht_conf->single_chain_sufficient = true;
1791 break;
1792 default:
1793 break;
1794 }
1795
1796 IWL_DEBUG_MAC80211(priv, "leave\n");
1797 }
1798
1799 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1800 {
1801 priv->assoc_id = 0;
1802 iwl_led_disassociate(priv);
1803 /*
1804 * inform the ucode that there is no longer an
1805 * association and that no more packets should be
1806 * sent
1807 */
1808 priv->staging_rxon.filter_flags &=
1809 ~RXON_FILTER_ASSOC_MSK;
1810 priv->staging_rxon.assoc_id = 0;
1811 iwlcore_commit_rxon(priv);
1812 }
1813
1814 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1815 struct ieee80211_vif *vif,
1816 struct ieee80211_bss_conf *bss_conf,
1817 u32 changes)
1818 {
1819 struct iwl_priv *priv = hw->priv;
1820 int ret;
1821
1822 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1823
1824 if (!iwl_is_alive(priv))
1825 return;
1826
1827 mutex_lock(&priv->mutex);
1828
1829 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1830 dev_kfree_skb(priv->ibss_beacon);
1831 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1832 }
1833
1834 if (changes & BSS_CHANGED_BEACON_INT) {
1835 priv->beacon_int = bss_conf->beacon_int;
1836 /* TODO: in AP mode, do something to make this take effect */
1837 }
1838
1839 if (changes & BSS_CHANGED_BSSID) {
1840 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1841
1842 /*
1843 * If there is currently a HW scan going on in the
1844 * background then we need to cancel it else the RXON
1845 * below/in post_associate will fail.
1846 */
1847 if (iwl_scan_cancel_timeout(priv, 100)) {
1848 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1849 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1850 mutex_unlock(&priv->mutex);
1851 return;
1852 }
1853
1854 /* mac80211 only sets assoc when in STATION mode */
1855 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1856 memcpy(priv->staging_rxon.bssid_addr,
1857 bss_conf->bssid, ETH_ALEN);
1858
1859 /* currently needed in a few places */
1860 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1861 } else {
1862 priv->staging_rxon.filter_flags &=
1863 ~RXON_FILTER_ASSOC_MSK;
1864 }
1865
1866 }
1867
1868 /*
1869 * This needs to be after setting the BSSID in case
1870 * mac80211 decides to do both changes at once because
1871 * it will invoke post_associate.
1872 */
1873 if (vif->type == NL80211_IFTYPE_ADHOC &&
1874 changes & BSS_CHANGED_BEACON) {
1875 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1876
1877 if (beacon)
1878 iwl_mac_beacon_update(hw, beacon);
1879 }
1880
1881 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1882 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1883 bss_conf->use_short_preamble);
1884 if (bss_conf->use_short_preamble)
1885 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1886 else
1887 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1888 }
1889
1890 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1891 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1892 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1893 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1894 else
1895 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1896 }
1897
1898 if (changes & BSS_CHANGED_BASIC_RATES) {
1899 /* XXX use this information
1900 *
1901 * To do that, remove code from iwl_set_rate() and put something
1902 * like this here:
1903 *
1904 if (A-band)
1905 priv->staging_rxon.ofdm_basic_rates =
1906 bss_conf->basic_rates;
1907 else
1908 priv->staging_rxon.ofdm_basic_rates =
1909 bss_conf->basic_rates >> 4;
1910 priv->staging_rxon.cck_basic_rates =
1911 bss_conf->basic_rates & 0xF;
1912 */
1913 }
1914
1915 if (changes & BSS_CHANGED_HT) {
1916 iwl_ht_conf(priv, bss_conf);
1917
1918 if (priv->cfg->ops->hcmd->set_rxon_chain)
1919 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1920 }
1921
1922 if (changes & BSS_CHANGED_ASSOC) {
1923 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1924 if (bss_conf->assoc) {
1925 priv->assoc_id = bss_conf->aid;
1926 priv->beacon_int = bss_conf->beacon_int;
1927 priv->timestamp = bss_conf->timestamp;
1928 priv->assoc_capability = bss_conf->assoc_capability;
1929
1930 iwl_led_associate(priv);
1931
1932 if (!iwl_is_rfkill(priv))
1933 priv->cfg->ops->lib->post_associate(priv);
1934 } else
1935 iwl_set_no_assoc(priv);
1936 }
1937
1938 if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1939 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1940 changes);
1941 ret = iwl_send_rxon_assoc(priv);
1942 if (!ret) {
1943 /* Sync active_rxon with latest change. */
1944 memcpy((void *)&priv->active_rxon,
1945 &priv->staging_rxon,
1946 sizeof(struct iwl_rxon_cmd));
1947 }
1948 }
1949
1950 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1951 if (vif->bss_conf.enable_beacon) {
1952 memcpy(priv->staging_rxon.bssid_addr,
1953 bss_conf->bssid, ETH_ALEN);
1954 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1955 iwlcore_config_ap(priv);
1956 } else
1957 iwl_set_no_assoc(priv);
1958 }
1959
1960 mutex_unlock(&priv->mutex);
1961
1962 IWL_DEBUG_MAC80211(priv, "leave\n");
1963 }
1964 EXPORT_SYMBOL(iwl_bss_info_changed);
1965
1966 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1967 {
1968 struct iwl_priv *priv = hw->priv;
1969 unsigned long flags;
1970 __le64 timestamp;
1971
1972 IWL_DEBUG_MAC80211(priv, "enter\n");
1973
1974 if (!iwl_is_ready_rf(priv)) {
1975 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1976 return -EIO;
1977 }
1978
1979 spin_lock_irqsave(&priv->lock, flags);
1980
1981 if (priv->ibss_beacon)
1982 dev_kfree_skb(priv->ibss_beacon);
1983
1984 priv->ibss_beacon = skb;
1985
1986 priv->assoc_id = 0;
1987 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1988 priv->timestamp = le64_to_cpu(timestamp);
1989
1990 IWL_DEBUG_MAC80211(priv, "leave\n");
1991 spin_unlock_irqrestore(&priv->lock, flags);
1992
1993 priv->cfg->ops->lib->post_associate(priv);
1994
1995 return 0;
1996 }
1997 EXPORT_SYMBOL(iwl_mac_beacon_update);
1998
1999 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2000 {
2001 iwl_connection_init_rx_config(priv, vif->type);
2002
2003 if (priv->cfg->ops->hcmd->set_rxon_chain)
2004 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2005
2006 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2007
2008 return iwlcore_commit_rxon(priv);
2009 }
2010
2011 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2012 {
2013 struct iwl_priv *priv = hw->priv;
2014 int err = 0;
2015
2016 IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2017
2018 mutex_lock(&priv->mutex);
2019
2020 if (WARN_ON(!iwl_is_ready_rf(priv))) {
2021 err = -EINVAL;
2022 goto out;
2023 }
2024
2025 if (priv->vif) {
2026 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2027 err = -EOPNOTSUPP;
2028 goto out;
2029 }
2030
2031 priv->vif = vif;
2032 priv->iw_mode = vif->type;
2033
2034 IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2035 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2036
2037 err = iwl_set_mode(priv, vif);
2038 if (err)
2039 goto out_err;
2040
2041 /* Add the broadcast address so we can send broadcast frames */
2042 priv->cfg->ops->lib->add_bcast_station(priv);
2043
2044 goto out;
2045
2046 out_err:
2047 priv->vif = NULL;
2048 priv->iw_mode = NL80211_IFTYPE_STATION;
2049 out:
2050 mutex_unlock(&priv->mutex);
2051
2052 IWL_DEBUG_MAC80211(priv, "leave\n");
2053 return err;
2054 }
2055 EXPORT_SYMBOL(iwl_mac_add_interface);
2056
2057 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2058 struct ieee80211_vif *vif)
2059 {
2060 struct iwl_priv *priv = hw->priv;
2061
2062 IWL_DEBUG_MAC80211(priv, "enter\n");
2063
2064 mutex_lock(&priv->mutex);
2065
2066 iwl_clear_ucode_stations(priv, true);
2067
2068 if (iwl_is_ready_rf(priv)) {
2069 iwl_scan_cancel_timeout(priv, 100);
2070 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2071 iwlcore_commit_rxon(priv);
2072 }
2073 if (priv->vif == vif) {
2074 priv->vif = NULL;
2075 memset(priv->bssid, 0, ETH_ALEN);
2076 }
2077 mutex_unlock(&priv->mutex);
2078
2079 IWL_DEBUG_MAC80211(priv, "leave\n");
2080
2081 }
2082 EXPORT_SYMBOL(iwl_mac_remove_interface);
2083
2084 /**
2085 * iwl_mac_config - mac80211 config callback
2086 */
2087 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2088 {
2089 struct iwl_priv *priv = hw->priv;
2090 const struct iwl_channel_info *ch_info;
2091 struct ieee80211_conf *conf = &hw->conf;
2092 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2093 unsigned long flags = 0;
2094 int ret = 0;
2095 u16 ch;
2096 int scan_active = 0;
2097
2098 mutex_lock(&priv->mutex);
2099
2100 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2101 conf->channel->hw_value, changed);
2102
2103 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2104 test_bit(STATUS_SCANNING, &priv->status))) {
2105 scan_active = 1;
2106 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2107 }
2108
2109 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2110 IEEE80211_CONF_CHANGE_CHANNEL)) {
2111 /* mac80211 uses static for non-HT which is what we want */
2112 priv->current_ht_config.smps = conf->smps_mode;
2113
2114 /*
2115 * Recalculate chain counts.
2116 *
2117 * If monitor mode is enabled then mac80211 will
2118 * set up the SM PS mode to OFF if an HT channel is
2119 * configured.
2120 */
2121 if (priv->cfg->ops->hcmd->set_rxon_chain)
2122 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2123 }
2124
2125 /* during scanning mac80211 will delay channel setting until
2126 * scan finish with changed = 0
2127 */
2128 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2129 if (scan_active)
2130 goto set_ch_out;
2131
2132 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2133 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2134 if (!is_channel_valid(ch_info)) {
2135 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2136 ret = -EINVAL;
2137 goto set_ch_out;
2138 }
2139
2140 spin_lock_irqsave(&priv->lock, flags);
2141
2142 /* Configure HT40 channels */
2143 ht_conf->is_ht = conf_is_ht(conf);
2144 if (ht_conf->is_ht) {
2145 if (conf_is_ht40_minus(conf)) {
2146 ht_conf->extension_chan_offset =
2147 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2148 ht_conf->is_40mhz = true;
2149 } else if (conf_is_ht40_plus(conf)) {
2150 ht_conf->extension_chan_offset =
2151 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2152 ht_conf->is_40mhz = true;
2153 } else {
2154 ht_conf->extension_chan_offset =
2155 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2156 ht_conf->is_40mhz = false;
2157 }
2158 } else
2159 ht_conf->is_40mhz = false;
2160 /* Default to no protection. Protection mode will later be set
2161 * from BSS config in iwl_ht_conf */
2162 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2163
2164 /* if we are switching from ht to 2.4 clear flags
2165 * from any ht related info since 2.4 does not
2166 * support ht */
2167 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2168 priv->staging_rxon.flags = 0;
2169
2170 iwl_set_rxon_channel(priv, conf->channel);
2171 iwl_set_rxon_ht(priv, ht_conf);
2172
2173 iwl_set_flags_for_band(priv, conf->channel->band);
2174 spin_unlock_irqrestore(&priv->lock, flags);
2175 if (iwl_is_associated(priv) &&
2176 (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2177 priv->cfg->ops->lib->set_channel_switch) {
2178 iwl_set_rate(priv);
2179 /*
2180 * at this point, staging_rxon has the
2181 * configuration for channel switch
2182 */
2183 ret = priv->cfg->ops->lib->set_channel_switch(priv,
2184 ch);
2185 if (!ret) {
2186 iwl_print_rx_config_cmd(priv);
2187 goto out;
2188 }
2189 priv->switch_rxon.switch_in_progress = false;
2190 }
2191 set_ch_out:
2192 /* The list of supported rates and rate mask can be different
2193 * for each band; since the band may have changed, reset
2194 * the rate mask to what mac80211 lists */
2195 iwl_set_rate(priv);
2196 }
2197
2198 if (changed & (IEEE80211_CONF_CHANGE_PS |
2199 IEEE80211_CONF_CHANGE_IDLE)) {
2200 ret = iwl_power_update_mode(priv, false);
2201 if (ret)
2202 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2203 }
2204
2205 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2206 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2207 priv->tx_power_user_lmt, conf->power_level);
2208
2209 iwl_set_tx_power(priv, conf->power_level, false);
2210 }
2211
2212 if (changed & IEEE80211_CONF_CHANGE_QOS) {
2213 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2214
2215 spin_lock_irqsave(&priv->lock, flags);
2216 priv->qos_data.qos_active = qos_active;
2217 iwl_update_qos(priv);
2218 spin_unlock_irqrestore(&priv->lock, flags);
2219 }
2220
2221 if (!iwl_is_ready(priv)) {
2222 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2223 goto out;
2224 }
2225
2226 if (scan_active)
2227 goto out;
2228
2229 if (memcmp(&priv->active_rxon,
2230 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2231 iwlcore_commit_rxon(priv);
2232 else
2233 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2234
2235
2236 out:
2237 IWL_DEBUG_MAC80211(priv, "leave\n");
2238 mutex_unlock(&priv->mutex);
2239 return ret;
2240 }
2241 EXPORT_SYMBOL(iwl_mac_config);
2242
2243 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2244 {
2245 struct iwl_priv *priv = hw->priv;
2246 unsigned long flags;
2247
2248 mutex_lock(&priv->mutex);
2249 IWL_DEBUG_MAC80211(priv, "enter\n");
2250
2251 spin_lock_irqsave(&priv->lock, flags);
2252 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2253 spin_unlock_irqrestore(&priv->lock, flags);
2254
2255 spin_lock_irqsave(&priv->lock, flags);
2256 priv->assoc_id = 0;
2257 priv->assoc_capability = 0;
2258
2259 /* new association get rid of ibss beacon skb */
2260 if (priv->ibss_beacon)
2261 dev_kfree_skb(priv->ibss_beacon);
2262
2263 priv->ibss_beacon = NULL;
2264
2265 priv->beacon_int = priv->vif->bss_conf.beacon_int;
2266 priv->timestamp = 0;
2267
2268 spin_unlock_irqrestore(&priv->lock, flags);
2269
2270 if (!iwl_is_ready_rf(priv)) {
2271 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2272 mutex_unlock(&priv->mutex);
2273 return;
2274 }
2275
2276 /* we are restarting association process
2277 * clear RXON_FILTER_ASSOC_MSK bit
2278 */
2279 iwl_scan_cancel_timeout(priv, 100);
2280 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2281 iwlcore_commit_rxon(priv);
2282
2283 iwl_set_rate(priv);
2284
2285 mutex_unlock(&priv->mutex);
2286
2287 IWL_DEBUG_MAC80211(priv, "leave\n");
2288 }
2289 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2290
2291 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2292 {
2293 if (!priv->txq)
2294 priv->txq = kzalloc(
2295 sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2296 GFP_KERNEL);
2297 if (!priv->txq) {
2298 IWL_ERR(priv, "Not enough memory for txq\n");
2299 return -ENOMEM;
2300 }
2301 return 0;
2302 }
2303 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2304
2305 void iwl_free_txq_mem(struct iwl_priv *priv)
2306 {
2307 kfree(priv->txq);
2308 priv->txq = NULL;
2309 }
2310 EXPORT_SYMBOL(iwl_free_txq_mem);
2311
2312 #ifdef CONFIG_IWLWIFI_DEBUGFS
2313
2314 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2315
2316 void iwl_reset_traffic_log(struct iwl_priv *priv)
2317 {
2318 priv->tx_traffic_idx = 0;
2319 priv->rx_traffic_idx = 0;
2320 if (priv->tx_traffic)
2321 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2322 if (priv->rx_traffic)
2323 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2324 }
2325
2326 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2327 {
2328 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2329
2330 if (iwl_debug_level & IWL_DL_TX) {
2331 if (!priv->tx_traffic) {
2332 priv->tx_traffic =
2333 kzalloc(traffic_size, GFP_KERNEL);
2334 if (!priv->tx_traffic)
2335 return -ENOMEM;
2336 }
2337 }
2338 if (iwl_debug_level & IWL_DL_RX) {
2339 if (!priv->rx_traffic) {
2340 priv->rx_traffic =
2341 kzalloc(traffic_size, GFP_KERNEL);
2342 if (!priv->rx_traffic)
2343 return -ENOMEM;
2344 }
2345 }
2346 iwl_reset_traffic_log(priv);
2347 return 0;
2348 }
2349 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2350
2351 void iwl_free_traffic_mem(struct iwl_priv *priv)
2352 {
2353 kfree(priv->tx_traffic);
2354 priv->tx_traffic = NULL;
2355
2356 kfree(priv->rx_traffic);
2357 priv->rx_traffic = NULL;
2358 }
2359 EXPORT_SYMBOL(iwl_free_traffic_mem);
2360
2361 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2362 u16 length, struct ieee80211_hdr *header)
2363 {
2364 __le16 fc;
2365 u16 len;
2366
2367 if (likely(!(iwl_debug_level & IWL_DL_TX)))
2368 return;
2369
2370 if (!priv->tx_traffic)
2371 return;
2372
2373 fc = header->frame_control;
2374 if (ieee80211_is_data(fc)) {
2375 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2376 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2377 memcpy((priv->tx_traffic +
2378 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2379 header, len);
2380 priv->tx_traffic_idx =
2381 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2382 }
2383 }
2384 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2385
2386 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2387 u16 length, struct ieee80211_hdr *header)
2388 {
2389 __le16 fc;
2390 u16 len;
2391
2392 if (likely(!(iwl_debug_level & IWL_DL_RX)))
2393 return;
2394
2395 if (!priv->rx_traffic)
2396 return;
2397
2398 fc = header->frame_control;
2399 if (ieee80211_is_data(fc)) {
2400 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2401 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2402 memcpy((priv->rx_traffic +
2403 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2404 header, len);
2405 priv->rx_traffic_idx =
2406 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2407 }
2408 }
2409 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2410
2411 const char *get_mgmt_string(int cmd)
2412 {
2413 switch (cmd) {
2414 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2415 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2416 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2417 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2418 IWL_CMD(MANAGEMENT_PROBE_REQ);
2419 IWL_CMD(MANAGEMENT_PROBE_RESP);
2420 IWL_CMD(MANAGEMENT_BEACON);
2421 IWL_CMD(MANAGEMENT_ATIM);
2422 IWL_CMD(MANAGEMENT_DISASSOC);
2423 IWL_CMD(MANAGEMENT_AUTH);
2424 IWL_CMD(MANAGEMENT_DEAUTH);
2425 IWL_CMD(MANAGEMENT_ACTION);
2426 default:
2427 return "UNKNOWN";
2428
2429 }
2430 }
2431
2432 const char *get_ctrl_string(int cmd)
2433 {
2434 switch (cmd) {
2435 IWL_CMD(CONTROL_BACK_REQ);
2436 IWL_CMD(CONTROL_BACK);
2437 IWL_CMD(CONTROL_PSPOLL);
2438 IWL_CMD(CONTROL_RTS);
2439 IWL_CMD(CONTROL_CTS);
2440 IWL_CMD(CONTROL_ACK);
2441 IWL_CMD(CONTROL_CFEND);
2442 IWL_CMD(CONTROL_CFENDACK);
2443 default:
2444 return "UNKNOWN";
2445
2446 }
2447 }
2448
2449 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2450 {
2451 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2452 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2453 priv->led_tpt = 0;
2454 }
2455
2456 /*
2457 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2458 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2459 * Use debugFs to display the rx/rx_statistics
2460 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2461 * information will be recorded, but DATA pkt still will be recorded
2462 * for the reason of iwl_led.c need to control the led blinking based on
2463 * number of tx and rx data.
2464 *
2465 */
2466 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2467 {
2468 struct traffic_stats *stats;
2469
2470 if (is_tx)
2471 stats = &priv->tx_stats;
2472 else
2473 stats = &priv->rx_stats;
2474
2475 if (ieee80211_is_mgmt(fc)) {
2476 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2477 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2478 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2479 break;
2480 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2481 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2482 break;
2483 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2484 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2485 break;
2486 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2487 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2488 break;
2489 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2490 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2491 break;
2492 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2493 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2494 break;
2495 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2496 stats->mgmt[MANAGEMENT_BEACON]++;
2497 break;
2498 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2499 stats->mgmt[MANAGEMENT_ATIM]++;
2500 break;
2501 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2502 stats->mgmt[MANAGEMENT_DISASSOC]++;
2503 break;
2504 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2505 stats->mgmt[MANAGEMENT_AUTH]++;
2506 break;
2507 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2508 stats->mgmt[MANAGEMENT_DEAUTH]++;
2509 break;
2510 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2511 stats->mgmt[MANAGEMENT_ACTION]++;
2512 break;
2513 }
2514 } else if (ieee80211_is_ctl(fc)) {
2515 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2516 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2517 stats->ctrl[CONTROL_BACK_REQ]++;
2518 break;
2519 case cpu_to_le16(IEEE80211_STYPE_BACK):
2520 stats->ctrl[CONTROL_BACK]++;
2521 break;
2522 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2523 stats->ctrl[CONTROL_PSPOLL]++;
2524 break;
2525 case cpu_to_le16(IEEE80211_STYPE_RTS):
2526 stats->ctrl[CONTROL_RTS]++;
2527 break;
2528 case cpu_to_le16(IEEE80211_STYPE_CTS):
2529 stats->ctrl[CONTROL_CTS]++;
2530 break;
2531 case cpu_to_le16(IEEE80211_STYPE_ACK):
2532 stats->ctrl[CONTROL_ACK]++;
2533 break;
2534 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2535 stats->ctrl[CONTROL_CFEND]++;
2536 break;
2537 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2538 stats->ctrl[CONTROL_CFENDACK]++;
2539 break;
2540 }
2541 } else {
2542 /* data */
2543 stats->data_cnt++;
2544 stats->data_bytes += len;
2545 }
2546 iwl_leds_background(priv);
2547 }
2548 EXPORT_SYMBOL(iwl_update_stats);
2549 #endif
2550
2551 const static char *get_csr_string(int cmd)
2552 {
2553 switch (cmd) {
2554 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2555 IWL_CMD(CSR_INT_COALESCING);
2556 IWL_CMD(CSR_INT);
2557 IWL_CMD(CSR_INT_MASK);
2558 IWL_CMD(CSR_FH_INT_STATUS);
2559 IWL_CMD(CSR_GPIO_IN);
2560 IWL_CMD(CSR_RESET);
2561 IWL_CMD(CSR_GP_CNTRL);
2562 IWL_CMD(CSR_HW_REV);
2563 IWL_CMD(CSR_EEPROM_REG);
2564 IWL_CMD(CSR_EEPROM_GP);
2565 IWL_CMD(CSR_OTP_GP_REG);
2566 IWL_CMD(CSR_GIO_REG);
2567 IWL_CMD(CSR_GP_UCODE_REG);
2568 IWL_CMD(CSR_GP_DRIVER_REG);
2569 IWL_CMD(CSR_UCODE_DRV_GP1);
2570 IWL_CMD(CSR_UCODE_DRV_GP2);
2571 IWL_CMD(CSR_LED_REG);
2572 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2573 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2574 IWL_CMD(CSR_ANA_PLL_CFG);
2575 IWL_CMD(CSR_HW_REV_WA_REG);
2576 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2577 default:
2578 return "UNKNOWN";
2579
2580 }
2581 }
2582
2583 void iwl_dump_csr(struct iwl_priv *priv)
2584 {
2585 int i;
2586 u32 csr_tbl[] = {
2587 CSR_HW_IF_CONFIG_REG,
2588 CSR_INT_COALESCING,
2589 CSR_INT,
2590 CSR_INT_MASK,
2591 CSR_FH_INT_STATUS,
2592 CSR_GPIO_IN,
2593 CSR_RESET,
2594 CSR_GP_CNTRL,
2595 CSR_HW_REV,
2596 CSR_EEPROM_REG,
2597 CSR_EEPROM_GP,
2598 CSR_OTP_GP_REG,
2599 CSR_GIO_REG,
2600 CSR_GP_UCODE_REG,
2601 CSR_GP_DRIVER_REG,
2602 CSR_UCODE_DRV_GP1,
2603 CSR_UCODE_DRV_GP2,
2604 CSR_LED_REG,
2605 CSR_DRAM_INT_TBL_REG,
2606 CSR_GIO_CHICKEN_BITS,
2607 CSR_ANA_PLL_CFG,
2608 CSR_HW_REV_WA_REG,
2609 CSR_DBG_HPET_MEM_REG
2610 };
2611 IWL_ERR(priv, "CSR values:\n");
2612 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2613 "CSR_INT_PERIODIC_REG)\n");
2614 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2615 IWL_ERR(priv, " %25s: 0X%08x\n",
2616 get_csr_string(csr_tbl[i]),
2617 iwl_read32(priv, csr_tbl[i]));
2618 }
2619 }
2620 EXPORT_SYMBOL(iwl_dump_csr);
2621
2622 const static char *get_fh_string(int cmd)
2623 {
2624 switch (cmd) {
2625 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2626 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2627 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2628 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2629 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2630 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2631 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2632 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2633 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2634 default:
2635 return "UNKNOWN";
2636
2637 }
2638 }
2639
2640 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2641 {
2642 int i;
2643 #ifdef CONFIG_IWLWIFI_DEBUG
2644 int pos = 0;
2645 size_t bufsz = 0;
2646 #endif
2647 u32 fh_tbl[] = {
2648 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2649 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2650 FH_RSCSR_CHNL0_WPTR,
2651 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2652 FH_MEM_RSSR_SHARED_CTRL_REG,
2653 FH_MEM_RSSR_RX_STATUS_REG,
2654 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2655 FH_TSSR_TX_STATUS_REG,
2656 FH_TSSR_TX_ERROR_REG
2657 };
2658 #ifdef CONFIG_IWLWIFI_DEBUG
2659 if (display) {
2660 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2661 *buf = kmalloc(bufsz, GFP_KERNEL);
2662 if (!*buf)
2663 return -ENOMEM;
2664 pos += scnprintf(*buf + pos, bufsz - pos,
2665 "FH register values:\n");
2666 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2667 pos += scnprintf(*buf + pos, bufsz - pos,
2668 " %34s: 0X%08x\n",
2669 get_fh_string(fh_tbl[i]),
2670 iwl_read_direct32(priv, fh_tbl[i]));
2671 }
2672 return pos;
2673 }
2674 #endif
2675 IWL_ERR(priv, "FH register values:\n");
2676 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2677 IWL_ERR(priv, " %34s: 0X%08x\n",
2678 get_fh_string(fh_tbl[i]),
2679 iwl_read_direct32(priv, fh_tbl[i]));
2680 }
2681 return 0;
2682 }
2683 EXPORT_SYMBOL(iwl_dump_fh);
2684
2685 static void iwl_force_rf_reset(struct iwl_priv *priv)
2686 {
2687 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2688 return;
2689
2690 if (!iwl_is_associated(priv)) {
2691 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2692 return;
2693 }
2694 /*
2695 * There is no easy and better way to force reset the radio,
2696 * the only known method is switching channel which will force to
2697 * reset and tune the radio.
2698 * Use internal short scan (single channel) operation to should
2699 * achieve this objective.
2700 * Driver should reset the radio when number of consecutive missed
2701 * beacon, or any other uCode error condition detected.
2702 */
2703 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2704 iwl_internal_short_hw_scan(priv);
2705 }
2706
2707
2708 int iwl_force_reset(struct iwl_priv *priv, int mode)
2709 {
2710 struct iwl_force_reset *force_reset;
2711
2712 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2713 return -EINVAL;
2714
2715 if (mode >= IWL_MAX_FORCE_RESET) {
2716 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2717 return -EINVAL;
2718 }
2719 force_reset = &priv->force_reset[mode];
2720 force_reset->reset_request_count++;
2721 if (force_reset->last_force_reset_jiffies &&
2722 time_after(force_reset->last_force_reset_jiffies +
2723 force_reset->reset_duration, jiffies)) {
2724 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2725 force_reset->reset_reject_count++;
2726 return -EAGAIN;
2727 }
2728 force_reset->reset_success_count++;
2729 force_reset->last_force_reset_jiffies = jiffies;
2730 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2731 switch (mode) {
2732 case IWL_RF_RESET:
2733 iwl_force_rf_reset(priv);
2734 break;
2735 case IWL_FW_RESET:
2736 IWL_ERR(priv, "On demand firmware reload\n");
2737 /* Set the FW error flag -- cleared on iwl_down */
2738 set_bit(STATUS_FW_ERROR, &priv->status);
2739 wake_up_interruptible(&priv->wait_command_queue);
2740 /*
2741 * Keep the restart process from trying to send host
2742 * commands by clearing the INIT status bit
2743 */
2744 clear_bit(STATUS_READY, &priv->status);
2745 queue_work(priv->workqueue, &priv->restart);
2746 break;
2747 }
2748 return 0;
2749 }
2750 EXPORT_SYMBOL(iwl_force_reset);
2751
2752 /**
2753 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2754 *
2755 * During normal condition (no queue is stuck), the timer is continually set to
2756 * execute every monitor_recover_period milliseconds after the last timer
2757 * expired. When the queue read_ptr is at the same place, the timer is
2758 * shorten to 100mSecs. This is
2759 * 1) to reduce the chance that the read_ptr may wrap around (not stuck)
2760 * 2) to detect the stuck queues quicker before the station and AP can
2761 * disassociate each other.
2762 *
2763 * This function monitors all the tx queues and recover from it if any
2764 * of the queues are stuck.
2765 * 1. It first check the cmd queue for stuck conditions. If it is stuck,
2766 * it will recover by resetting the firmware and return.
2767 * 2. Then, it checks for station association. If it associates it will check
2768 * other queues. If any queue is stuck, it will recover by resetting
2769 * the firmware.
2770 * Note: It the number of times the queue read_ptr to be at the same place to
2771 * be MAX_REPEAT+1 in order to consider to be stuck.
2772 */
2773 /*
2774 * The maximum number of times the read pointer of the tx queue at the
2775 * same place without considering to be stuck.
2776 */
2777 #define MAX_REPEAT (2)
2778 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2779 {
2780 struct iwl_tx_queue *txq;
2781 struct iwl_queue *q;
2782
2783 txq = &priv->txq[cnt];
2784 q = &txq->q;
2785 /* queue is empty, skip */
2786 if (q->read_ptr != q->write_ptr) {
2787 if (q->read_ptr == q->last_read_ptr) {
2788 /* a queue has not been read from last time */
2789 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2790 IWL_ERR(priv,
2791 "queue %d stuck %d time. Fw reload.\n",
2792 q->id, q->repeat_same_read_ptr);
2793 q->repeat_same_read_ptr = 0;
2794 iwl_force_reset(priv, IWL_FW_RESET);
2795 } else {
2796 q->repeat_same_read_ptr++;
2797 IWL_DEBUG_RADIO(priv,
2798 "queue %d, not read %d time\n",
2799 q->id,
2800 q->repeat_same_read_ptr);
2801 mod_timer(&priv->monitor_recover, jiffies +
2802 msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2803 }
2804 return 1;
2805 } else {
2806 q->last_read_ptr = q->read_ptr;
2807 q->repeat_same_read_ptr = 0;
2808 }
2809 }
2810 return 0;
2811 }
2812
2813 void iwl_bg_monitor_recover(unsigned long data)
2814 {
2815 struct iwl_priv *priv = (struct iwl_priv *)data;
2816 int cnt;
2817
2818 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2819 return;
2820
2821 /* monitor and check for stuck cmd queue */
2822 if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2823 return;
2824
2825 /* monitor and check for other stuck queues */
2826 if (iwl_is_associated(priv)) {
2827 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2828 /* skip as we already checked the command queue */
2829 if (cnt == IWL_CMD_QUEUE_NUM)
2830 continue;
2831 if (iwl_check_stuck_queue(priv, cnt))
2832 return;
2833 }
2834 }
2835 /*
2836 * Reschedule the timer to occur in
2837 * priv->cfg->monitor_recover_period
2838 */
2839 mod_timer(&priv->monitor_recover,
2840 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2841 }
2842 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2843
2844 #ifdef CONFIG_PM
2845
2846 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2847 {
2848 struct iwl_priv *priv = pci_get_drvdata(pdev);
2849
2850 /*
2851 * This function is called when system goes into suspend state
2852 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2853 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2854 * it will not call apm_ops.stop() to stop the DMA operation.
2855 * Calling apm_ops.stop here to make sure we stop the DMA.
2856 */
2857 priv->cfg->ops->lib->apm_ops.stop(priv);
2858
2859 pci_save_state(pdev);
2860 pci_disable_device(pdev);
2861 pci_set_power_state(pdev, PCI_D3hot);
2862
2863 return 0;
2864 }
2865 EXPORT_SYMBOL(iwl_pci_suspend);
2866
2867 int iwl_pci_resume(struct pci_dev *pdev)
2868 {
2869 struct iwl_priv *priv = pci_get_drvdata(pdev);
2870 int ret;
2871
2872 /*
2873 * We disable the RETRY_TIMEOUT register (0x41) to keep
2874 * PCI Tx retries from interfering with C3 CPU state.
2875 */
2876 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2877
2878 pci_set_power_state(pdev, PCI_D0);
2879 ret = pci_enable_device(pdev);
2880 if (ret)
2881 return ret;
2882 pci_restore_state(pdev);
2883 iwl_enable_interrupts(priv);
2884
2885 return 0;
2886 }
2887 EXPORT_SYMBOL(iwl_pci_resume);
2888
2889 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree