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iwlegacy: fix channel switch locking
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlegacy / iwl-core.c
blob3be76bd5499a960f5e7685953a18074c44504525
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 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"
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-legacy: common functions for 3945 and 4965");
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 u32 iwlegacy_debug_level;
72 EXPORT_SYMBOL(iwlegacy_debug_level);
73
74 const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
75 EXPORT_SYMBOL(iwlegacy_bcast_addr);
76
77
78 /* This function both allocates and initializes hw and priv. */
79 struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
80 {
81 struct iwl_priv *priv;
82 /* mac80211 allocates memory for this device instance, including
83 * space for this driver's private structure */
84 struct ieee80211_hw *hw;
85
86 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
87 cfg->ops->ieee80211_ops);
88 if (hw == NULL) {
89 pr_err("%s: Can not allocate network device\n",
90 cfg->name);
91 goto out;
92 }
93
94 priv = hw->priv;
95 priv->hw = hw;
96
97 out:
98 return hw;
99 }
100 EXPORT_SYMBOL(iwl_legacy_alloc_all);
101
102 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
103 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
104 static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
105 struct ieee80211_sta_ht_cap *ht_info,
106 enum ieee80211_band band)
107 {
108 u16 max_bit_rate = 0;
109 u8 rx_chains_num = priv->hw_params.rx_chains_num;
110 u8 tx_chains_num = priv->hw_params.tx_chains_num;
111
112 ht_info->cap = 0;
113 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
114
115 ht_info->ht_supported = true;
116
117 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
118 max_bit_rate = MAX_BIT_RATE_20_MHZ;
119 if (priv->hw_params.ht40_channel & BIT(band)) {
120 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
121 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
122 ht_info->mcs.rx_mask[4] = 0x01;
123 max_bit_rate = MAX_BIT_RATE_40_MHZ;
124 }
125
126 if (priv->cfg->mod_params->amsdu_size_8K)
127 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
128
129 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
130 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
131
132 ht_info->mcs.rx_mask[0] = 0xFF;
133 if (rx_chains_num >= 2)
134 ht_info->mcs.rx_mask[1] = 0xFF;
135 if (rx_chains_num >= 3)
136 ht_info->mcs.rx_mask[2] = 0xFF;
137
138 /* Highest supported Rx data rate */
139 max_bit_rate *= rx_chains_num;
140 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
141 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
142
143 /* Tx MCS capabilities */
144 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
145 if (tx_chains_num != rx_chains_num) {
146 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
147 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
148 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
149 }
150 }
151
152 /**
153 * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
154 */
155 int iwl_legacy_init_geos(struct iwl_priv *priv)
156 {
157 struct iwl_channel_info *ch;
158 struct ieee80211_supported_band *sband;
159 struct ieee80211_channel *channels;
160 struct ieee80211_channel *geo_ch;
161 struct ieee80211_rate *rates;
162 int i = 0;
163 s8 max_tx_power = 0;
164
165 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
166 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
167 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
168 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
169 return 0;
170 }
171
172 channels = kzalloc(sizeof(struct ieee80211_channel) *
173 priv->channel_count, GFP_KERNEL);
174 if (!channels)
175 return -ENOMEM;
176
177 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
178 GFP_KERNEL);
179 if (!rates) {
180 kfree(channels);
181 return -ENOMEM;
182 }
183
184 /* 5.2GHz channels start after the 2.4GHz channels */
185 sband = &priv->bands[IEEE80211_BAND_5GHZ];
186 sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
187 /* just OFDM */
188 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
189 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
190
191 if (priv->cfg->sku & IWL_SKU_N)
192 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
193 IEEE80211_BAND_5GHZ);
194
195 sband = &priv->bands[IEEE80211_BAND_2GHZ];
196 sband->channels = channels;
197 /* OFDM & CCK */
198 sband->bitrates = rates;
199 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
200
201 if (priv->cfg->sku & IWL_SKU_N)
202 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
203 IEEE80211_BAND_2GHZ);
204
205 priv->ieee_channels = channels;
206 priv->ieee_rates = rates;
207
208 for (i = 0; i < priv->channel_count; i++) {
209 ch = &priv->channel_info[i];
210
211 if (!iwl_legacy_is_channel_valid(ch))
212 continue;
213
214 sband = &priv->bands[ch->band];
215
216 geo_ch = &sband->channels[sband->n_channels++];
217
218 geo_ch->center_freq =
219 ieee80211_channel_to_frequency(ch->channel, ch->band);
220 geo_ch->max_power = ch->max_power_avg;
221 geo_ch->max_antenna_gain = 0xff;
222 geo_ch->hw_value = ch->channel;
223
224 if (iwl_legacy_is_channel_valid(ch)) {
225 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
226 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
227
228 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
229 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
230
231 if (ch->flags & EEPROM_CHANNEL_RADAR)
232 geo_ch->flags |= IEEE80211_CHAN_RADAR;
233
234 geo_ch->flags |= ch->ht40_extension_channel;
235
236 if (ch->max_power_avg > max_tx_power)
237 max_tx_power = ch->max_power_avg;
238 } else {
239 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
240 }
241
242 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
243 ch->channel, geo_ch->center_freq,
244 iwl_legacy_is_channel_a_band(ch) ? "5.2" : "2.4",
245 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
246 "restricted" : "valid",
247 geo_ch->flags);
248 }
249
250 priv->tx_power_device_lmt = max_tx_power;
251 priv->tx_power_user_lmt = max_tx_power;
252 priv->tx_power_next = max_tx_power;
253
254 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
255 priv->cfg->sku & IWL_SKU_A) {
256 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
257 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
258 priv->pci_dev->device,
259 priv->pci_dev->subsystem_device);
260 priv->cfg->sku &= ~IWL_SKU_A;
261 }
262
263 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
264 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
265 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
266
267 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
268
269 return 0;
270 }
271 EXPORT_SYMBOL(iwl_legacy_init_geos);
272
273 /*
274 * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
275 */
276 void iwl_legacy_free_geos(struct iwl_priv *priv)
277 {
278 kfree(priv->ieee_channels);
279 kfree(priv->ieee_rates);
280 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
281 }
282 EXPORT_SYMBOL(iwl_legacy_free_geos);
283
284 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
285 enum ieee80211_band band,
286 u16 channel, u8 extension_chan_offset)
287 {
288 const struct iwl_channel_info *ch_info;
289
290 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
291 if (!iwl_legacy_is_channel_valid(ch_info))
292 return false;
293
294 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
295 return !(ch_info->ht40_extension_channel &
296 IEEE80211_CHAN_NO_HT40PLUS);
297 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
298 return !(ch_info->ht40_extension_channel &
299 IEEE80211_CHAN_NO_HT40MINUS);
300
301 return false;
302 }
303
304 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
305 struct iwl_rxon_context *ctx,
306 struct ieee80211_sta_ht_cap *ht_cap)
307 {
308 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
309 return false;
310
311 /*
312 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
313 * the bit will not set if it is pure 40MHz case
314 */
315 if (ht_cap && !ht_cap->ht_supported)
316 return false;
317
318 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
319 if (priv->disable_ht40)
320 return false;
321 #endif
322
323 return iwl_legacy_is_channel_extension(priv, priv->band,
324 le16_to_cpu(ctx->staging.channel),
325 ctx->ht.extension_chan_offset);
326 }
327 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
328
329 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
330 {
331 u16 new_val;
332 u16 beacon_factor;
333
334 /*
335 * If mac80211 hasn't given us a beacon interval, program
336 * the default into the device.
337 */
338 if (!beacon_val)
339 return DEFAULT_BEACON_INTERVAL;
340
341 /*
342 * If the beacon interval we obtained from the peer
343 * is too large, we'll have to wake up more often
344 * (and in IBSS case, we'll beacon too much)
345 *
346 * For example, if max_beacon_val is 4096, and the
347 * requested beacon interval is 7000, we'll have to
348 * use 3500 to be able to wake up on the beacons.
349 *
350 * This could badly influence beacon detection stats.
351 */
352
353 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
354 new_val = beacon_val / beacon_factor;
355
356 if (!new_val)
357 new_val = max_beacon_val;
358
359 return new_val;
360 }
361
362 int
363 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
364 {
365 u64 tsf;
366 s32 interval_tm, rem;
367 struct ieee80211_conf *conf = NULL;
368 u16 beacon_int;
369 struct ieee80211_vif *vif = ctx->vif;
370
371 conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
372
373 lockdep_assert_held(&priv->mutex);
374
375 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
376
377 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
378 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
379
380 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
381
382 /*
383 * TODO: For IBSS we need to get atim_window from mac80211,
384 * for now just always use 0
385 */
386 ctx->timing.atim_window = 0;
387
388 beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
389 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
390 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
391
392 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
393 interval_tm = beacon_int * TIME_UNIT;
394 rem = do_div(tsf, interval_tm);
395 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
396
397 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
398
399 IWL_DEBUG_ASSOC(priv,
400 "beacon interval %d beacon timer %d beacon tim %d\n",
401 le16_to_cpu(ctx->timing.beacon_interval),
402 le32_to_cpu(ctx->timing.beacon_init_val),
403 le16_to_cpu(ctx->timing.atim_window));
404
405 return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
406 sizeof(ctx->timing), &ctx->timing);
407 }
408 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
409
410 void
411 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
412 struct iwl_rxon_context *ctx,
413 int hw_decrypt)
414 {
415 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
416
417 if (hw_decrypt)
418 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
419 else
420 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
421
422 }
423 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
424
425 /* validate RXON structure is valid */
426 int
427 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
428 {
429 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
430 bool error = false;
431
432 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
433 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
434 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
435 error = true;
436 }
437 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
438 IWL_WARN(priv, "check 2.4G: wrong radar\n");
439 error = true;
440 }
441 } else {
442 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
443 IWL_WARN(priv, "check 5.2G: not short slot!\n");
444 error = true;
445 }
446 if (rxon->flags & RXON_FLG_CCK_MSK) {
447 IWL_WARN(priv, "check 5.2G: CCK!\n");
448 error = true;
449 }
450 }
451 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
452 IWL_WARN(priv, "mac/bssid mcast!\n");
453 error = true;
454 }
455
456 /* make sure basic rates 6Mbps and 1Mbps are supported */
457 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
458 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
459 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
460 error = true;
461 }
462
463 if (le16_to_cpu(rxon->assoc_id) > 2007) {
464 IWL_WARN(priv, "aid > 2007\n");
465 error = true;
466 }
467
468 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
469 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
470 IWL_WARN(priv, "CCK and short slot\n");
471 error = true;
472 }
473
474 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
475 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
476 IWL_WARN(priv, "CCK and auto detect");
477 error = true;
478 }
479
480 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
481 RXON_FLG_TGG_PROTECT_MSK)) ==
482 RXON_FLG_TGG_PROTECT_MSK) {
483 IWL_WARN(priv, "TGg but no auto-detect\n");
484 error = true;
485 }
486
487 if (error)
488 IWL_WARN(priv, "Tuning to channel %d\n",
489 le16_to_cpu(rxon->channel));
490
491 if (error) {
492 IWL_ERR(priv, "Invalid RXON\n");
493 return -EINVAL;
494 }
495 return 0;
496 }
497 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
498
499 /**
500 * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
501 * @priv: staging_rxon is compared to active_rxon
502 *
503 * If the RXON structure is changing enough to require a new tune,
504 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
505 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
506 */
507 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
508 struct iwl_rxon_context *ctx)
509 {
510 const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
511 const struct iwl_legacy_rxon_cmd *active = &ctx->active;
512
513 #define CHK(cond) \
514 if ((cond)) { \
515 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
516 return 1; \
517 }
518
519 #define CHK_NEQ(c1, c2) \
520 if ((c1) != (c2)) { \
521 IWL_DEBUG_INFO(priv, "need full RXON - " \
522 #c1 " != " #c2 " - %d != %d\n", \
523 (c1), (c2)); \
524 return 1; \
525 }
526
527 /* These items are only settable from the full RXON command */
528 CHK(!iwl_legacy_is_associated_ctx(ctx));
529 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
530 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
531 CHK(compare_ether_addr(staging->wlap_bssid_addr,
532 active->wlap_bssid_addr));
533 CHK_NEQ(staging->dev_type, active->dev_type);
534 CHK_NEQ(staging->channel, active->channel);
535 CHK_NEQ(staging->air_propagation, active->air_propagation);
536 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
537 active->ofdm_ht_single_stream_basic_rates);
538 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
539 active->ofdm_ht_dual_stream_basic_rates);
540 CHK_NEQ(staging->assoc_id, active->assoc_id);
541
542 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
543 * be updated with the RXON_ASSOC command -- however only some
544 * flag transitions are allowed using RXON_ASSOC */
545
546 /* Check if we are not switching bands */
547 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
548 active->flags & RXON_FLG_BAND_24G_MSK);
549
550 /* Check if we are switching association toggle */
551 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
552 active->filter_flags & RXON_FILTER_ASSOC_MSK);
553
554 #undef CHK
555 #undef CHK_NEQ
556
557 return 0;
558 }
559 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
560
561 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
562 struct iwl_rxon_context *ctx)
563 {
564 /*
565 * Assign the lowest rate -- should really get this from
566 * the beacon skb from mac80211.
567 */
568 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
569 return IWL_RATE_1M_PLCP;
570 else
571 return IWL_RATE_6M_PLCP;
572 }
573 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
574
575 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
576 struct iwl_ht_config *ht_conf,
577 struct iwl_rxon_context *ctx)
578 {
579 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
580
581 if (!ctx->ht.enabled) {
582 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
583 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
584 RXON_FLG_HT40_PROT_MSK |
585 RXON_FLG_HT_PROT_MSK);
586 return;
587 }
588
589 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
590 RXON_FLG_HT_OPERATING_MODE_POS);
591
592 /* Set up channel bandwidth:
593 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
594 /* clear the HT channel mode before set the mode */
595 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
596 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
597 if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
598 /* pure ht40 */
599 if (ctx->ht.protection ==
600 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
601 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
602 /* Note: control channel is opposite of extension channel */
603 switch (ctx->ht.extension_chan_offset) {
604 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
605 rxon->flags &=
606 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
607 break;
608 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
609 rxon->flags |=
610 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
611 break;
612 }
613 } else {
614 /* Note: control channel is opposite of extension channel */
615 switch (ctx->ht.extension_chan_offset) {
616 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
617 rxon->flags &=
618 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
619 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
620 break;
621 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
622 rxon->flags |=
623 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
624 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
625 break;
626 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
627 default:
628 /* channel location only valid if in Mixed mode */
629 IWL_ERR(priv,
630 "invalid extension channel offset\n");
631 break;
632 }
633 }
634 } else {
635 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
636 }
637
638 if (priv->cfg->ops->hcmd->set_rxon_chain)
639 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
640
641 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
642 "extension channel offset 0x%x\n",
643 le32_to_cpu(rxon->flags), ctx->ht.protection,
644 ctx->ht.extension_chan_offset);
645 }
646
647 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
648 {
649 struct iwl_rxon_context *ctx;
650
651 for_each_context(priv, ctx)
652 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
653 }
654 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
655
656 /* Return valid, unused, channel for a passive scan to reset the RF */
657 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
658 enum ieee80211_band band)
659 {
660 const struct iwl_channel_info *ch_info;
661 int i;
662 u8 channel = 0;
663 u8 min, max;
664 struct iwl_rxon_context *ctx;
665
666 if (band == IEEE80211_BAND_5GHZ) {
667 min = 14;
668 max = priv->channel_count;
669 } else {
670 min = 0;
671 max = 14;
672 }
673
674 for (i = min; i < max; i++) {
675 bool busy = false;
676
677 for_each_context(priv, ctx) {
678 busy = priv->channel_info[i].channel ==
679 le16_to_cpu(ctx->staging.channel);
680 if (busy)
681 break;
682 }
683
684 if (busy)
685 continue;
686
687 channel = priv->channel_info[i].channel;
688 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
689 if (iwl_legacy_is_channel_valid(ch_info))
690 break;
691 }
692
693 return channel;
694 }
695 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
696
697 /**
698 * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
699 * @ch: requested channel as a pointer to struct ieee80211_channel
700
701 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
702 * in the staging RXON flag structure based on the ch->band
703 */
704 int
705 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
706 struct iwl_rxon_context *ctx)
707 {
708 enum ieee80211_band band = ch->band;
709 u16 channel = ch->hw_value;
710
711 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
712 (priv->band == band))
713 return 0;
714
715 ctx->staging.channel = cpu_to_le16(channel);
716 if (band == IEEE80211_BAND_5GHZ)
717 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
718 else
719 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
720
721 priv->band = band;
722
723 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
724
725 return 0;
726 }
727 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
728
729 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
730 struct iwl_rxon_context *ctx,
731 enum ieee80211_band band,
732 struct ieee80211_vif *vif)
733 {
734 if (band == IEEE80211_BAND_5GHZ) {
735 ctx->staging.flags &=
736 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
737 | RXON_FLG_CCK_MSK);
738 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
739 } else {
740 /* Copied from iwl_post_associate() */
741 if (vif && vif->bss_conf.use_short_slot)
742 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
743 else
744 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
745
746 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
747 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
748 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
749 }
750 }
751 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
752
753 /*
754 * initialize rxon structure with default values from eeprom
755 */
756 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
757 struct iwl_rxon_context *ctx)
758 {
759 const struct iwl_channel_info *ch_info;
760
761 memset(&ctx->staging, 0, sizeof(ctx->staging));
762
763 if (!ctx->vif) {
764 ctx->staging.dev_type = ctx->unused_devtype;
765 } else
766 switch (ctx->vif->type) {
767
768 case NL80211_IFTYPE_STATION:
769 ctx->staging.dev_type = ctx->station_devtype;
770 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
771 break;
772
773 case NL80211_IFTYPE_ADHOC:
774 ctx->staging.dev_type = ctx->ibss_devtype;
775 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
776 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
777 RXON_FILTER_ACCEPT_GRP_MSK;
778 break;
779
780 default:
781 IWL_ERR(priv, "Unsupported interface type %d\n",
782 ctx->vif->type);
783 break;
784 }
785
786 #if 0
787 /* TODO: Figure out when short_preamble would be set and cache from
788 * that */
789 if (!hw_to_local(priv->hw)->short_preamble)
790 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
791 else
792 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
793 #endif
794
795 ch_info = iwl_legacy_get_channel_info(priv, priv->band,
796 le16_to_cpu(ctx->active.channel));
797
798 if (!ch_info)
799 ch_info = &priv->channel_info[0];
800
801 ctx->staging.channel = cpu_to_le16(ch_info->channel);
802 priv->band = ch_info->band;
803
804 iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
805
806 ctx->staging.ofdm_basic_rates =
807 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
808 ctx->staging.cck_basic_rates =
809 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
810
811 /* clear both MIX and PURE40 mode flag */
812 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
813 RXON_FLG_CHANNEL_MODE_PURE_40);
814 if (ctx->vif)
815 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
816
817 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
818 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
819 }
820 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
821
822 void iwl_legacy_set_rate(struct iwl_priv *priv)
823 {
824 const struct ieee80211_supported_band *hw = NULL;
825 struct ieee80211_rate *rate;
826 struct iwl_rxon_context *ctx;
827 int i;
828
829 hw = iwl_get_hw_mode(priv, priv->band);
830 if (!hw) {
831 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
832 return;
833 }
834
835 priv->active_rate = 0;
836
837 for (i = 0; i < hw->n_bitrates; i++) {
838 rate = &(hw->bitrates[i]);
839 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
840 priv->active_rate |= (1 << rate->hw_value);
841 }
842
843 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
844
845 for_each_context(priv, ctx) {
846 ctx->staging.cck_basic_rates =
847 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
848
849 ctx->staging.ofdm_basic_rates =
850 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
851 }
852 }
853 EXPORT_SYMBOL(iwl_legacy_set_rate);
854
855 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
856 {
857 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
858
859 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
860 return;
861
862 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
863 ieee80211_chswitch_done(ctx->vif, is_success);
864 }
865 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
866
867 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
868 {
869 struct iwl_rx_packet *pkt = rxb_addr(rxb);
870 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
871
872 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
873 struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
874
875 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
876 return;
877
878 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
879 rxon->channel = csa->channel;
880 ctx->staging.channel = csa->channel;
881 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
882 le16_to_cpu(csa->channel));
883 iwl_legacy_chswitch_done(priv, true);
884 } else {
885 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
886 le16_to_cpu(csa->channel));
887 iwl_legacy_chswitch_done(priv, false);
888 }
889 }
890 EXPORT_SYMBOL(iwl_legacy_rx_csa);
891
892 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
893 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
894 struct iwl_rxon_context *ctx)
895 {
896 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
897
898 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
899 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
900 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
901 le16_to_cpu(rxon->channel));
902 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
903 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
904 le32_to_cpu(rxon->filter_flags));
905 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
906 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
907 rxon->ofdm_basic_rates);
908 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
909 rxon->cck_basic_rates);
910 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
911 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
912 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
913 le16_to_cpu(rxon->assoc_id));
914 }
915 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
916 #endif
917 /**
918 * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
919 */
920 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
921 {
922 /* Set the FW error flag -- cleared on iwl_down */
923 set_bit(STATUS_FW_ERROR, &priv->status);
924
925 /* Cancel currently queued command. */
926 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
927
928 IWL_ERR(priv, "Loaded firmware version: %s\n",
929 priv->hw->wiphy->fw_version);
930
931 priv->cfg->ops->lib->dump_nic_error_log(priv);
932 if (priv->cfg->ops->lib->dump_fh)
933 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
934 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
935 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
936 if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
937 iwl_legacy_print_rx_config_cmd(priv,
938 &priv->contexts[IWL_RXON_CTX_BSS]);
939 #endif
940
941 wake_up_interruptible(&priv->wait_command_queue);
942
943 /* Keep the restart process from trying to send host
944 * commands by clearing the INIT status bit */
945 clear_bit(STATUS_READY, &priv->status);
946
947 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
948 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
949 "Restarting adapter due to uCode error.\n");
950
951 if (priv->cfg->mod_params->restart_fw)
952 queue_work(priv->workqueue, &priv->restart);
953 }
954 }
955 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
956
957 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
958 {
959 int ret = 0;
960
961 /* stop device's busmaster DMA activity */
962 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
963
964 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
965 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
966 if (ret)
967 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
968
969 IWL_DEBUG_INFO(priv, "stop master\n");
970
971 return ret;
972 }
973
974 void iwl_legacy_apm_stop(struct iwl_priv *priv)
975 {
976 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
977
978 /* Stop device's DMA activity */
979 iwl_legacy_apm_stop_master(priv);
980
981 /* Reset the entire device */
982 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
983
984 udelay(10);
985
986 /*
987 * Clear "initialization complete" bit to move adapter from
988 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
989 */
990 iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
991 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
992 }
993 EXPORT_SYMBOL(iwl_legacy_apm_stop);
994
995
996 /*
997 * Start up NIC's basic functionality after it has been reset
998 * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
999 * NOTE: This does not load uCode nor start the embedded processor
1000 */
1001 int iwl_legacy_apm_init(struct iwl_priv *priv)
1002 {
1003 int ret = 0;
1004 u16 lctl;
1005
1006 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1007
1008 /*
1009 * Use "set_bit" below rather than "write", to preserve any hardware
1010 * bits already set by default after reset.
1011 */
1012
1013 /* Disable L0S exit timer (platform NMI Work/Around) */
1014 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1015 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1016
1017 /*
1018 * Disable L0s without affecting L1;
1019 * don't wait for ICH L0s (ICH bug W/A)
1020 */
1021 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1022 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1023
1024 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1025 iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1026 CSR_DBG_HPET_MEM_REG_VAL);
1027
1028 /*
1029 * Enable HAP INTA (interrupt from management bus) to
1030 * wake device's PCI Express link L1a -> L0s
1031 * NOTE: This is no-op for 3945 (non-existent bit)
1032 */
1033 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1034 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1035
1036 /*
1037 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1038 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1039 * If so (likely), disable L0S, so device moves directly L0->L1;
1040 * costs negligible amount of power savings.
1041 * If not (unlikely), enable L0S, so there is at least some
1042 * power savings, even without L1.
1043 */
1044 if (priv->cfg->base_params->set_l0s) {
1045 lctl = iwl_legacy_pcie_link_ctl(priv);
1046 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1047 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1048 /* L1-ASPM enabled; disable(!) L0S */
1049 iwl_legacy_set_bit(priv, CSR_GIO_REG,
1050 CSR_GIO_REG_VAL_L0S_ENABLED);
1051 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1052 } else {
1053 /* L1-ASPM disabled; enable(!) L0S */
1054 iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1055 CSR_GIO_REG_VAL_L0S_ENABLED);
1056 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1057 }
1058 }
1059
1060 /* Configure analog phase-lock-loop before activating to D0A */
1061 if (priv->cfg->base_params->pll_cfg_val)
1062 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1063 priv->cfg->base_params->pll_cfg_val);
1064
1065 /*
1066 * Set "initialization complete" bit to move adapter from
1067 * D0U* --> D0A* (powered-up active) state.
1068 */
1069 iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1070
1071 /*
1072 * Wait for clock stabilization; once stabilized, access to
1073 * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1074 * and accesses to uCode SRAM.
1075 */
1076 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1077 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1078 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1079 if (ret < 0) {
1080 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1081 goto out;
1082 }
1083
1084 /*
1085 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1086 * BSM (Boostrap State Machine) is only in 3945 and 4965.
1087 *
1088 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1089 * do not disable clocks. This preserves any hardware bits already
1090 * set by default in "CLK_CTRL_REG" after reset.
1091 */
1092 if (priv->cfg->base_params->use_bsm)
1093 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1094 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1095 else
1096 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1097 APMG_CLK_VAL_DMA_CLK_RQT);
1098 udelay(20);
1099
1100 /* Disable L1-Active */
1101 iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1102 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1103
1104 out:
1105 return ret;
1106 }
1107 EXPORT_SYMBOL(iwl_legacy_apm_init);
1108
1109
1110 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1111 {
1112 int ret;
1113 s8 prev_tx_power;
1114 bool defer;
1115 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1116
1117 lockdep_assert_held(&priv->mutex);
1118
1119 if (priv->tx_power_user_lmt == tx_power && !force)
1120 return 0;
1121
1122 if (!priv->cfg->ops->lib->send_tx_power)
1123 return -EOPNOTSUPP;
1124
1125 /* 0 dBm mean 1 milliwatt */
1126 if (tx_power < 0) {
1127 IWL_WARN(priv,
1128 "Requested user TXPOWER %d below 1 mW.\n",
1129 tx_power);
1130 return -EINVAL;
1131 }
1132
1133 if (tx_power > priv->tx_power_device_lmt) {
1134 IWL_WARN(priv,
1135 "Requested user TXPOWER %d above upper limit %d.\n",
1136 tx_power, priv->tx_power_device_lmt);
1137 return -EINVAL;
1138 }
1139
1140 if (!iwl_legacy_is_ready_rf(priv))
1141 return -EIO;
1142
1143 /* scan complete and commit_rxon use tx_power_next value,
1144 * it always need to be updated for newest request */
1145 priv->tx_power_next = tx_power;
1146
1147 /* do not set tx power when scanning or channel changing */
1148 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1149 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1150 if (defer && !force) {
1151 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1152 return 0;
1153 }
1154
1155 prev_tx_power = priv->tx_power_user_lmt;
1156 priv->tx_power_user_lmt = tx_power;
1157
1158 ret = priv->cfg->ops->lib->send_tx_power(priv);
1159
1160 /* if fail to set tx_power, restore the orig. tx power */
1161 if (ret) {
1162 priv->tx_power_user_lmt = prev_tx_power;
1163 priv->tx_power_next = prev_tx_power;
1164 }
1165 return ret;
1166 }
1167 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1168
1169 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1170 {
1171 struct iwl_bt_cmd bt_cmd = {
1172 .lead_time = BT_LEAD_TIME_DEF,
1173 .max_kill = BT_MAX_KILL_DEF,
1174 .kill_ack_mask = 0,
1175 .kill_cts_mask = 0,
1176 };
1177
1178 if (!bt_coex_active)
1179 bt_cmd.flags = BT_COEX_DISABLE;
1180 else
1181 bt_cmd.flags = BT_COEX_ENABLE;
1182
1183 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1184 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1185
1186 if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1187 sizeof(struct iwl_bt_cmd), &bt_cmd))
1188 IWL_ERR(priv, "failed to send BT Coex Config\n");
1189 }
1190 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1191
1192 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1193 {
1194 struct iwl_statistics_cmd statistics_cmd = {
1195 .configuration_flags =
1196 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1197 };
1198
1199 if (flags & CMD_ASYNC)
1200 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1201 sizeof(struct iwl_statistics_cmd),
1202 &statistics_cmd, NULL);
1203 else
1204 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1205 sizeof(struct iwl_statistics_cmd),
1206 &statistics_cmd);
1207 }
1208 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1209
1210 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1211 struct iwl_rx_mem_buffer *rxb)
1212 {
1213 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1214 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1215 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1216 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1217 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1218 #endif
1219 }
1220 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1221
1222 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1223 struct iwl_rx_mem_buffer *rxb)
1224 {
1225 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1226 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1227 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1228 "notification for %s:\n", len,
1229 iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1230 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1231 }
1232 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1233
1234 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1235 struct iwl_rx_mem_buffer *rxb)
1236 {
1237 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1238
1239 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1240 "seq 0x%04X ser 0x%08X\n",
1241 le32_to_cpu(pkt->u.err_resp.error_type),
1242 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1243 pkt->u.err_resp.cmd_id,
1244 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1245 le32_to_cpu(pkt->u.err_resp.error_info));
1246 }
1247 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1248
1249 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1250 {
1251 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1252 }
1253
1254 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1255 const struct ieee80211_tx_queue_params *params)
1256 {
1257 struct iwl_priv *priv = hw->priv;
1258 struct iwl_rxon_context *ctx;
1259 unsigned long flags;
1260 int q;
1261
1262 IWL_DEBUG_MAC80211(priv, "enter\n");
1263
1264 if (!iwl_legacy_is_ready_rf(priv)) {
1265 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1266 return -EIO;
1267 }
1268
1269 if (queue >= AC_NUM) {
1270 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1271 return 0;
1272 }
1273
1274 q = AC_NUM - 1 - queue;
1275
1276 spin_lock_irqsave(&priv->lock, flags);
1277
1278 for_each_context(priv, ctx) {
1279 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1280 cpu_to_le16(params->cw_min);
1281 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1282 cpu_to_le16(params->cw_max);
1283 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1284 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1285 cpu_to_le16((params->txop * 32));
1286
1287 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1288 }
1289
1290 spin_unlock_irqrestore(&priv->lock, flags);
1291
1292 IWL_DEBUG_MAC80211(priv, "leave\n");
1293 return 0;
1294 }
1295 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1296
1297 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1298 {
1299 struct iwl_priv *priv = hw->priv;
1300
1301 return priv->ibss_manager == IWL_IBSS_MANAGER;
1302 }
1303 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1304
1305 static int
1306 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1307 {
1308 iwl_legacy_connection_init_rx_config(priv, ctx);
1309
1310 if (priv->cfg->ops->hcmd->set_rxon_chain)
1311 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1312
1313 return iwl_legacy_commit_rxon(priv, ctx);
1314 }
1315
1316 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1317 struct iwl_rxon_context *ctx)
1318 {
1319 struct ieee80211_vif *vif = ctx->vif;
1320 int err;
1321
1322 lockdep_assert_held(&priv->mutex);
1323
1324 /*
1325 * This variable will be correct only when there's just
1326 * a single context, but all code using it is for hardware
1327 * that supports only one context.
1328 */
1329 priv->iw_mode = vif->type;
1330
1331 ctx->is_active = true;
1332
1333 err = iwl_legacy_set_mode(priv, ctx);
1334 if (err) {
1335 if (!ctx->always_active)
1336 ctx->is_active = false;
1337 return err;
1338 }
1339
1340 return 0;
1341 }
1342
1343 int
1344 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1345 {
1346 struct iwl_priv *priv = hw->priv;
1347 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1348 struct iwl_rxon_context *tmp, *ctx = NULL;
1349 int err;
1350
1351 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1352 vif->type, vif->addr);
1353
1354 mutex_lock(&priv->mutex);
1355
1356 if (!iwl_legacy_is_ready_rf(priv)) {
1357 IWL_WARN(priv, "Try to add interface when device not ready\n");
1358 err = -EINVAL;
1359 goto out;
1360 }
1361
1362 for_each_context(priv, tmp) {
1363 u32 possible_modes =
1364 tmp->interface_modes | tmp->exclusive_interface_modes;
1365
1366 if (tmp->vif) {
1367 /* check if this busy context is exclusive */
1368 if (tmp->exclusive_interface_modes &
1369 BIT(tmp->vif->type)) {
1370 err = -EINVAL;
1371 goto out;
1372 }
1373 continue;
1374 }
1375
1376 if (!(possible_modes & BIT(vif->type)))
1377 continue;
1378
1379 /* have maybe usable context w/o interface */
1380 ctx = tmp;
1381 break;
1382 }
1383
1384 if (!ctx) {
1385 err = -EOPNOTSUPP;
1386 goto out;
1387 }
1388
1389 vif_priv->ctx = ctx;
1390 ctx->vif = vif;
1391
1392 err = iwl_legacy_setup_interface(priv, ctx);
1393 if (!err)
1394 goto out;
1395
1396 ctx->vif = NULL;
1397 priv->iw_mode = NL80211_IFTYPE_STATION;
1398 out:
1399 mutex_unlock(&priv->mutex);
1400
1401 IWL_DEBUG_MAC80211(priv, "leave\n");
1402 return err;
1403 }
1404 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1405
1406 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1407 struct ieee80211_vif *vif,
1408 bool mode_change)
1409 {
1410 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1411
1412 lockdep_assert_held(&priv->mutex);
1413
1414 if (priv->scan_vif == vif) {
1415 iwl_legacy_scan_cancel_timeout(priv, 200);
1416 iwl_legacy_force_scan_end(priv);
1417 }
1418
1419 if (!mode_change) {
1420 iwl_legacy_set_mode(priv, ctx);
1421 if (!ctx->always_active)
1422 ctx->is_active = false;
1423 }
1424 }
1425
1426 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1427 struct ieee80211_vif *vif)
1428 {
1429 struct iwl_priv *priv = hw->priv;
1430 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1431
1432 IWL_DEBUG_MAC80211(priv, "enter\n");
1433
1434 mutex_lock(&priv->mutex);
1435
1436 WARN_ON(ctx->vif != vif);
1437 ctx->vif = NULL;
1438
1439 iwl_legacy_teardown_interface(priv, vif, false);
1440
1441 memset(priv->bssid, 0, ETH_ALEN);
1442 mutex_unlock(&priv->mutex);
1443
1444 IWL_DEBUG_MAC80211(priv, "leave\n");
1445
1446 }
1447 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1448
1449 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1450 {
1451 if (!priv->txq)
1452 priv->txq = kzalloc(
1453 sizeof(struct iwl_tx_queue) *
1454 priv->cfg->base_params->num_of_queues,
1455 GFP_KERNEL);
1456 if (!priv->txq) {
1457 IWL_ERR(priv, "Not enough memory for txq\n");
1458 return -ENOMEM;
1459 }
1460 return 0;
1461 }
1462 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1463
1464 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1465 {
1466 kfree(priv->txq);
1467 priv->txq = NULL;
1468 }
1469 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1470
1471 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1472
1473 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1474
1475 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1476 {
1477 priv->tx_traffic_idx = 0;
1478 priv->rx_traffic_idx = 0;
1479 if (priv->tx_traffic)
1480 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1481 if (priv->rx_traffic)
1482 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1483 }
1484
1485 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1486 {
1487 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1488
1489 if (iwlegacy_debug_level & IWL_DL_TX) {
1490 if (!priv->tx_traffic) {
1491 priv->tx_traffic =
1492 kzalloc(traffic_size, GFP_KERNEL);
1493 if (!priv->tx_traffic)
1494 return -ENOMEM;
1495 }
1496 }
1497 if (iwlegacy_debug_level & IWL_DL_RX) {
1498 if (!priv->rx_traffic) {
1499 priv->rx_traffic =
1500 kzalloc(traffic_size, GFP_KERNEL);
1501 if (!priv->rx_traffic)
1502 return -ENOMEM;
1503 }
1504 }
1505 iwl_legacy_reset_traffic_log(priv);
1506 return 0;
1507 }
1508 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1509
1510 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1511 {
1512 kfree(priv->tx_traffic);
1513 priv->tx_traffic = NULL;
1514
1515 kfree(priv->rx_traffic);
1516 priv->rx_traffic = NULL;
1517 }
1518 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1519
1520 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1521 u16 length, struct ieee80211_hdr *header)
1522 {
1523 __le16 fc;
1524 u16 len;
1525
1526 if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1527 return;
1528
1529 if (!priv->tx_traffic)
1530 return;
1531
1532 fc = header->frame_control;
1533 if (ieee80211_is_data(fc)) {
1534 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1535 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1536 memcpy((priv->tx_traffic +
1537 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1538 header, len);
1539 priv->tx_traffic_idx =
1540 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1541 }
1542 }
1543 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1544
1545 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1546 u16 length, struct ieee80211_hdr *header)
1547 {
1548 __le16 fc;
1549 u16 len;
1550
1551 if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1552 return;
1553
1554 if (!priv->rx_traffic)
1555 return;
1556
1557 fc = header->frame_control;
1558 if (ieee80211_is_data(fc)) {
1559 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1560 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1561 memcpy((priv->rx_traffic +
1562 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1563 header, len);
1564 priv->rx_traffic_idx =
1565 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1566 }
1567 }
1568 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1569
1570 const char *iwl_legacy_get_mgmt_string(int cmd)
1571 {
1572 switch (cmd) {
1573 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1574 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1575 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1576 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1577 IWL_CMD(MANAGEMENT_PROBE_REQ);
1578 IWL_CMD(MANAGEMENT_PROBE_RESP);
1579 IWL_CMD(MANAGEMENT_BEACON);
1580 IWL_CMD(MANAGEMENT_ATIM);
1581 IWL_CMD(MANAGEMENT_DISASSOC);
1582 IWL_CMD(MANAGEMENT_AUTH);
1583 IWL_CMD(MANAGEMENT_DEAUTH);
1584 IWL_CMD(MANAGEMENT_ACTION);
1585 default:
1586 return "UNKNOWN";
1587
1588 }
1589 }
1590
1591 const char *iwl_legacy_get_ctrl_string(int cmd)
1592 {
1593 switch (cmd) {
1594 IWL_CMD(CONTROL_BACK_REQ);
1595 IWL_CMD(CONTROL_BACK);
1596 IWL_CMD(CONTROL_PSPOLL);
1597 IWL_CMD(CONTROL_RTS);
1598 IWL_CMD(CONTROL_CTS);
1599 IWL_CMD(CONTROL_ACK);
1600 IWL_CMD(CONTROL_CFEND);
1601 IWL_CMD(CONTROL_CFENDACK);
1602 default:
1603 return "UNKNOWN";
1604
1605 }
1606 }
1607
1608 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1609 {
1610 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1611 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1612 }
1613
1614 /*
1615 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1616 * iwl_legacy_update_stats function will
1617 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1618 * Use debugFs to display the rx/rx_statistics
1619 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1620 * information will be recorded, but DATA pkt still will be recorded
1621 * for the reason of iwl_led.c need to control the led blinking based on
1622 * number of tx and rx data.
1623 *
1624 */
1625 void
1626 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1627 {
1628 struct traffic_stats *stats;
1629
1630 if (is_tx)
1631 stats = &priv->tx_stats;
1632 else
1633 stats = &priv->rx_stats;
1634
1635 if (ieee80211_is_mgmt(fc)) {
1636 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1637 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1638 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1639 break;
1640 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1641 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1642 break;
1643 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1644 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1645 break;
1646 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1647 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1648 break;
1649 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1650 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1651 break;
1652 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1653 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1654 break;
1655 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1656 stats->mgmt[MANAGEMENT_BEACON]++;
1657 break;
1658 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1659 stats->mgmt[MANAGEMENT_ATIM]++;
1660 break;
1661 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1662 stats->mgmt[MANAGEMENT_DISASSOC]++;
1663 break;
1664 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1665 stats->mgmt[MANAGEMENT_AUTH]++;
1666 break;
1667 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1668 stats->mgmt[MANAGEMENT_DEAUTH]++;
1669 break;
1670 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1671 stats->mgmt[MANAGEMENT_ACTION]++;
1672 break;
1673 }
1674 } else if (ieee80211_is_ctl(fc)) {
1675 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1676 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1677 stats->ctrl[CONTROL_BACK_REQ]++;
1678 break;
1679 case cpu_to_le16(IEEE80211_STYPE_BACK):
1680 stats->ctrl[CONTROL_BACK]++;
1681 break;
1682 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1683 stats->ctrl[CONTROL_PSPOLL]++;
1684 break;
1685 case cpu_to_le16(IEEE80211_STYPE_RTS):
1686 stats->ctrl[CONTROL_RTS]++;
1687 break;
1688 case cpu_to_le16(IEEE80211_STYPE_CTS):
1689 stats->ctrl[CONTROL_CTS]++;
1690 break;
1691 case cpu_to_le16(IEEE80211_STYPE_ACK):
1692 stats->ctrl[CONTROL_ACK]++;
1693 break;
1694 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1695 stats->ctrl[CONTROL_CFEND]++;
1696 break;
1697 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1698 stats->ctrl[CONTROL_CFENDACK]++;
1699 break;
1700 }
1701 } else {
1702 /* data */
1703 stats->data_cnt++;
1704 stats->data_bytes += len;
1705 }
1706 }
1707 EXPORT_SYMBOL(iwl_legacy_update_stats);
1708 #endif
1709
1710 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1711 {
1712 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1713 return;
1714
1715 if (!iwl_legacy_is_any_associated(priv)) {
1716 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1717 return;
1718 }
1719 /*
1720 * There is no easy and better way to force reset the radio,
1721 * the only known method is switching channel which will force to
1722 * reset and tune the radio.
1723 * Use internal short scan (single channel) operation to should
1724 * achieve this objective.
1725 * Driver should reset the radio when number of consecutive missed
1726 * beacon, or any other uCode error condition detected.
1727 */
1728 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1729 iwl_legacy_internal_short_hw_scan(priv);
1730 }
1731
1732
1733 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1734 {
1735 struct iwl_force_reset *force_reset;
1736
1737 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1738 return -EINVAL;
1739
1740 if (mode >= IWL_MAX_FORCE_RESET) {
1741 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1742 return -EINVAL;
1743 }
1744 force_reset = &priv->force_reset[mode];
1745 force_reset->reset_request_count++;
1746 if (!external) {
1747 if (force_reset->last_force_reset_jiffies &&
1748 time_after(force_reset->last_force_reset_jiffies +
1749 force_reset->reset_duration, jiffies)) {
1750 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1751 force_reset->reset_reject_count++;
1752 return -EAGAIN;
1753 }
1754 }
1755 force_reset->reset_success_count++;
1756 force_reset->last_force_reset_jiffies = jiffies;
1757 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1758 switch (mode) {
1759 case IWL_RF_RESET:
1760 _iwl_legacy_force_rf_reset(priv);
1761 break;
1762 case IWL_FW_RESET:
1763 /*
1764 * if the request is from external(ex: debugfs),
1765 * then always perform the request in regardless the module
1766 * parameter setting
1767 * if the request is from internal (uCode error or driver
1768 * detect failure), then fw_restart module parameter
1769 * need to be check before performing firmware reload
1770 */
1771 if (!external && !priv->cfg->mod_params->restart_fw) {
1772 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1773 "module parameter setting\n");
1774 break;
1775 }
1776 IWL_ERR(priv, "On demand firmware reload\n");
1777 /* Set the FW error flag -- cleared on iwl_down */
1778 set_bit(STATUS_FW_ERROR, &priv->status);
1779 wake_up_interruptible(&priv->wait_command_queue);
1780 /*
1781 * Keep the restart process from trying to send host
1782 * commands by clearing the INIT status bit
1783 */
1784 clear_bit(STATUS_READY, &priv->status);
1785 queue_work(priv->workqueue, &priv->restart);
1786 break;
1787 }
1788 return 0;
1789 }
1790
1791 int
1792 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1793 struct ieee80211_vif *vif,
1794 enum nl80211_iftype newtype, bool newp2p)
1795 {
1796 struct iwl_priv *priv = hw->priv;
1797 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1798 struct iwl_rxon_context *tmp;
1799 u32 interface_modes;
1800 int err;
1801
1802 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1803
1804 mutex_lock(&priv->mutex);
1805
1806 if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1807 /*
1808 * Huh? But wait ... this can maybe happen when
1809 * we're in the middle of a firmware restart!
1810 */
1811 err = -EBUSY;
1812 goto out;
1813 }
1814
1815 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1816
1817 if (!(interface_modes & BIT(newtype))) {
1818 err = -EBUSY;
1819 goto out;
1820 }
1821
1822 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1823 for_each_context(priv, tmp) {
1824 if (ctx == tmp)
1825 continue;
1826
1827 if (!tmp->vif)
1828 continue;
1829
1830 /*
1831 * The current mode switch would be exclusive, but
1832 * another context is active ... refuse the switch.
1833 */
1834 err = -EBUSY;
1835 goto out;
1836 }
1837 }
1838
1839 /* success */
1840 iwl_legacy_teardown_interface(priv, vif, true);
1841 vif->type = newtype;
1842 vif->p2p = newp2p;
1843 err = iwl_legacy_setup_interface(priv, ctx);
1844 WARN_ON(err);
1845 /*
1846 * We've switched internally, but submitting to the
1847 * device may have failed for some reason. Mask this
1848 * error, because otherwise mac80211 will not switch
1849 * (and set the interface type back) and we'll be
1850 * out of sync with it.
1851 */
1852 err = 0;
1853
1854 out:
1855 mutex_unlock(&priv->mutex);
1856 return err;
1857 }
1858 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1859
1860 /*
1861 * On every watchdog tick we check (latest) time stamp. If it does not
1862 * change during timeout period and queue is not empty we reset firmware.
1863 */
1864 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1865 {
1866 struct iwl_tx_queue *txq = &priv->txq[cnt];
1867 struct iwl_queue *q = &txq->q;
1868 unsigned long timeout;
1869 int ret;
1870
1871 if (q->read_ptr == q->write_ptr) {
1872 txq->time_stamp = jiffies;
1873 return 0;
1874 }
1875
1876 timeout = txq->time_stamp +
1877 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1878
1879 if (time_after(jiffies, timeout)) {
1880 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1881 q->id, priv->cfg->base_params->wd_timeout);
1882 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1883 return (ret == -EAGAIN) ? 0 : 1;
1884 }
1885
1886 return 0;
1887 }
1888
1889 /*
1890 * Making watchdog tick be a quarter of timeout assure we will
1891 * discover the queue hung between timeout and 1.25*timeout
1892 */
1893 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1894
1895 /*
1896 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1897 * we reset the firmware. If everything is fine just rearm the timer.
1898 */
1899 void iwl_legacy_bg_watchdog(unsigned long data)
1900 {
1901 struct iwl_priv *priv = (struct iwl_priv *)data;
1902 int cnt;
1903 unsigned long timeout;
1904
1905 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1906 return;
1907
1908 timeout = priv->cfg->base_params->wd_timeout;
1909 if (timeout == 0)
1910 return;
1911
1912 /* monitor and check for stuck cmd queue */
1913 if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1914 return;
1915
1916 /* monitor and check for other stuck queues */
1917 if (iwl_legacy_is_any_associated(priv)) {
1918 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1919 /* skip as we already checked the command queue */
1920 if (cnt == priv->cmd_queue)
1921 continue;
1922 if (iwl_legacy_check_stuck_queue(priv, cnt))
1923 return;
1924 }
1925 }
1926
1927 mod_timer(&priv->watchdog, jiffies +
1928 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1929 }
1930 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1931
1932 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1933 {
1934 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1935
1936 if (timeout)
1937 mod_timer(&priv->watchdog,
1938 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1939 else
1940 del_timer(&priv->watchdog);
1941 }
1942 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1943
1944 /*
1945 * extended beacon time format
1946 * time in usec will be changed into a 32-bit value in extended:internal format
1947 * the extended part is the beacon counts
1948 * the internal part is the time in usec within one beacon interval
1949 */
1950 u32
1951 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1952 u32 usec, u32 beacon_interval)
1953 {
1954 u32 quot;
1955 u32 rem;
1956 u32 interval = beacon_interval * TIME_UNIT;
1957
1958 if (!interval || !usec)
1959 return 0;
1960
1961 quot = (usec / interval) &
1962 (iwl_legacy_beacon_time_mask_high(priv,
1963 priv->hw_params.beacon_time_tsf_bits) >>
1964 priv->hw_params.beacon_time_tsf_bits);
1965 rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1966 priv->hw_params.beacon_time_tsf_bits);
1967
1968 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1969 }
1970 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1971
1972 /* base is usually what we get from ucode with each received frame,
1973 * the same as HW timer counter counting down
1974 */
1975 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1976 u32 addon, u32 beacon_interval)
1977 {
1978 u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1979 priv->hw_params.beacon_time_tsf_bits);
1980 u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1981 priv->hw_params.beacon_time_tsf_bits);
1982 u32 interval = beacon_interval * TIME_UNIT;
1983 u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1984 priv->hw_params.beacon_time_tsf_bits)) +
1985 (addon & iwl_legacy_beacon_time_mask_high(priv,
1986 priv->hw_params.beacon_time_tsf_bits));
1987
1988 if (base_low > addon_low)
1989 res += base_low - addon_low;
1990 else if (base_low < addon_low) {
1991 res += interval + base_low - addon_low;
1992 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1993 } else
1994 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1995
1996 return cpu_to_le32(res);
1997 }
1998 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
1999
2000 #ifdef CONFIG_PM
2001
2002 int iwl_legacy_pci_suspend(struct device *device)
2003 {
2004 struct pci_dev *pdev = to_pci_dev(device);
2005 struct iwl_priv *priv = pci_get_drvdata(pdev);
2006
2007 /*
2008 * This function is called when system goes into suspend state
2009 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2010 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2011 * it will not call apm_ops.stop() to stop the DMA operation.
2012 * Calling apm_ops.stop here to make sure we stop the DMA.
2013 */
2014 iwl_legacy_apm_stop(priv);
2015
2016 return 0;
2017 }
2018 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2019
2020 int iwl_legacy_pci_resume(struct device *device)
2021 {
2022 struct pci_dev *pdev = to_pci_dev(device);
2023 struct iwl_priv *priv = pci_get_drvdata(pdev);
2024 bool hw_rfkill = false;
2025
2026 /*
2027 * We disable the RETRY_TIMEOUT register (0x41) to keep
2028 * PCI Tx retries from interfering with C3 CPU state.
2029 */
2030 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2031
2032 iwl_legacy_enable_interrupts(priv);
2033
2034 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2035 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2036 hw_rfkill = true;
2037
2038 if (hw_rfkill)
2039 set_bit(STATUS_RF_KILL_HW, &priv->status);
2040 else
2041 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2042
2043 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2044
2045 return 0;
2046 }
2047 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2048
2049 const struct dev_pm_ops iwl_legacy_pm_ops = {
2050 .suspend = iwl_legacy_pci_suspend,
2051 .resume = iwl_legacy_pci_resume,
2052 .freeze = iwl_legacy_pci_suspend,
2053 .thaw = iwl_legacy_pci_resume,
2054 .poweroff = iwl_legacy_pci_suspend,
2055 .restore = iwl_legacy_pci_resume,
2056 };
2057 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2058
2059 #endif /* CONFIG_PM */
2060
2061 static void
2062 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2063 {
2064 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2065 return;
2066
2067 if (!ctx->is_active)
2068 return;
2069
2070 ctx->qos_data.def_qos_parm.qos_flags = 0;
2071
2072 if (ctx->qos_data.qos_active)
2073 ctx->qos_data.def_qos_parm.qos_flags |=
2074 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2075
2076 if (ctx->ht.enabled)
2077 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2078
2079 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2080 ctx->qos_data.qos_active,
2081 ctx->qos_data.def_qos_parm.qos_flags);
2082
2083 iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2084 sizeof(struct iwl_qosparam_cmd),
2085 &ctx->qos_data.def_qos_parm, NULL);
2086 }
2087
2088 /**
2089 * iwl_legacy_mac_config - mac80211 config callback
2090 */
2091 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2092 {
2093 struct iwl_priv *priv = hw->priv;
2094 const struct iwl_channel_info *ch_info;
2095 struct ieee80211_conf *conf = &hw->conf;
2096 struct ieee80211_channel *channel = conf->channel;
2097 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2098 struct iwl_rxon_context *ctx;
2099 unsigned long flags = 0;
2100 int ret = 0;
2101 u16 ch;
2102 int scan_active = 0;
2103 bool ht_changed[NUM_IWL_RXON_CTX] = {};
2104
2105 if (WARN_ON(!priv->cfg->ops->legacy))
2106 return -EOPNOTSUPP;
2107
2108 mutex_lock(&priv->mutex);
2109
2110 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2111 channel->hw_value, changed);
2112
2113 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2114 scan_active = 1;
2115 IWL_DEBUG_MAC80211(priv, "scan active\n");
2116 }
2117
2118 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2119 IEEE80211_CONF_CHANGE_CHANNEL)) {
2120 /* mac80211 uses static for non-HT which is what we want */
2121 priv->current_ht_config.smps = conf->smps_mode;
2122
2123 /*
2124 * Recalculate chain counts.
2125 *
2126 * If monitor mode is enabled then mac80211 will
2127 * set up the SM PS mode to OFF if an HT channel is
2128 * configured.
2129 */
2130 if (priv->cfg->ops->hcmd->set_rxon_chain)
2131 for_each_context(priv, ctx)
2132 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2133 }
2134
2135 /* during scanning mac80211 will delay channel setting until
2136 * scan finish with changed = 0
2137 */
2138 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2139 if (scan_active)
2140 goto set_ch_out;
2141
2142 ch = channel->hw_value;
2143 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2144 if (!iwl_legacy_is_channel_valid(ch_info)) {
2145 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2146 ret = -EINVAL;
2147 goto set_ch_out;
2148 }
2149
2150 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2151 !iwl_legacy_is_channel_ibss(ch_info)) {
2152 IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2153 ret = -EINVAL;
2154 goto set_ch_out;
2155 }
2156
2157 spin_lock_irqsave(&priv->lock, flags);
2158
2159 for_each_context(priv, ctx) {
2160 /* Configure HT40 channels */
2161 if (ctx->ht.enabled != conf_is_ht(conf)) {
2162 ctx->ht.enabled = conf_is_ht(conf);
2163 ht_changed[ctx->ctxid] = true;
2164 }
2165 if (ctx->ht.enabled) {
2166 if (conf_is_ht40_minus(conf)) {
2167 ctx->ht.extension_chan_offset =
2168 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2169 ctx->ht.is_40mhz = true;
2170 } else if (conf_is_ht40_plus(conf)) {
2171 ctx->ht.extension_chan_offset =
2172 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2173 ctx->ht.is_40mhz = true;
2174 } else {
2175 ctx->ht.extension_chan_offset =
2176 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2177 ctx->ht.is_40mhz = false;
2178 }
2179 } else
2180 ctx->ht.is_40mhz = false;
2181
2182 /*
2183 * Default to no protection. Protection mode will
2184 * later be set from BSS config in iwl_ht_conf
2185 */
2186 ctx->ht.protection =
2187 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2188
2189 /* if we are switching from ht to 2.4 clear flags
2190 * from any ht related info since 2.4 does not
2191 * support ht */
2192 if ((le16_to_cpu(ctx->staging.channel) != ch))
2193 ctx->staging.flags = 0;
2194
2195 iwl_legacy_set_rxon_channel(priv, channel, ctx);
2196 iwl_legacy_set_rxon_ht(priv, ht_conf);
2197
2198 iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2199 ctx->vif);
2200 }
2201
2202 spin_unlock_irqrestore(&priv->lock, flags);
2203
2204 if (priv->cfg->ops->legacy->update_bcast_stations)
2205 ret =
2206 priv->cfg->ops->legacy->update_bcast_stations(priv);
2207
2208 set_ch_out:
2209 /* The list of supported rates and rate mask can be different
2210 * for each band; since the band may have changed, reset
2211 * the rate mask to what mac80211 lists */
2212 iwl_legacy_set_rate(priv);
2213 }
2214
2215 if (changed & (IEEE80211_CONF_CHANGE_PS |
2216 IEEE80211_CONF_CHANGE_IDLE)) {
2217 ret = iwl_legacy_power_update_mode(priv, false);
2218 if (ret)
2219 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2220 }
2221
2222 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2223 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2224 priv->tx_power_user_lmt, conf->power_level);
2225
2226 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2227 }
2228
2229 if (!iwl_legacy_is_ready(priv)) {
2230 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2231 goto out;
2232 }
2233
2234 if (scan_active)
2235 goto out;
2236
2237 for_each_context(priv, ctx) {
2238 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2239 iwl_legacy_commit_rxon(priv, ctx);
2240 else
2241 IWL_DEBUG_INFO(priv,
2242 "Not re-sending same RXON configuration.\n");
2243 if (ht_changed[ctx->ctxid])
2244 iwl_legacy_update_qos(priv, ctx);
2245 }
2246
2247 out:
2248 IWL_DEBUG_MAC80211(priv, "leave\n");
2249 mutex_unlock(&priv->mutex);
2250 return ret;
2251 }
2252 EXPORT_SYMBOL(iwl_legacy_mac_config);
2253
2254 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2255 {
2256 struct iwl_priv *priv = hw->priv;
2257 unsigned long flags;
2258 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2259 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2260
2261 if (WARN_ON(!priv->cfg->ops->legacy))
2262 return;
2263
2264 mutex_lock(&priv->mutex);
2265 IWL_DEBUG_MAC80211(priv, "enter\n");
2266
2267 spin_lock_irqsave(&priv->lock, flags);
2268 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2269 spin_unlock_irqrestore(&priv->lock, flags);
2270
2271 spin_lock_irqsave(&priv->lock, flags);
2272
2273 /* new association get rid of ibss beacon skb */
2274 if (priv->beacon_skb)
2275 dev_kfree_skb(priv->beacon_skb);
2276
2277 priv->beacon_skb = NULL;
2278
2279 priv->timestamp = 0;
2280
2281 spin_unlock_irqrestore(&priv->lock, flags);
2282
2283 iwl_legacy_scan_cancel_timeout(priv, 100);
2284 if (!iwl_legacy_is_ready_rf(priv)) {
2285 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2286 mutex_unlock(&priv->mutex);
2287 return;
2288 }
2289
2290 /* we are restarting association process
2291 * clear RXON_FILTER_ASSOC_MSK bit
2292 */
2293 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2294 iwl_legacy_commit_rxon(priv, ctx);
2295
2296 iwl_legacy_set_rate(priv);
2297
2298 mutex_unlock(&priv->mutex);
2299
2300 IWL_DEBUG_MAC80211(priv, "leave\n");
2301 }
2302 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2303
2304 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2305 struct ieee80211_vif *vif)
2306 {
2307 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2308 struct ieee80211_sta *sta;
2309 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2310 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2311
2312 IWL_DEBUG_ASSOC(priv, "enter:\n");
2313
2314 if (!ctx->ht.enabled)
2315 return;
2316
2317 ctx->ht.protection =
2318 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2319 ctx->ht.non_gf_sta_present =
2320 !!(bss_conf->ht_operation_mode &
2321 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2322
2323 ht_conf->single_chain_sufficient = false;
2324
2325 switch (vif->type) {
2326 case NL80211_IFTYPE_STATION:
2327 rcu_read_lock();
2328 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2329 if (sta) {
2330 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2331 int maxstreams;
2332
2333 maxstreams = (ht_cap->mcs.tx_params &
2334 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2335 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2336 maxstreams += 1;
2337
2338 if ((ht_cap->mcs.rx_mask[1] == 0) &&
2339 (ht_cap->mcs.rx_mask[2] == 0))
2340 ht_conf->single_chain_sufficient = true;
2341 if (maxstreams <= 1)
2342 ht_conf->single_chain_sufficient = true;
2343 } else {
2344 /*
2345 * If at all, this can only happen through a race
2346 * when the AP disconnects us while we're still
2347 * setting up the connection, in that case mac80211
2348 * will soon tell us about that.
2349 */
2350 ht_conf->single_chain_sufficient = true;
2351 }
2352 rcu_read_unlock();
2353 break;
2354 case NL80211_IFTYPE_ADHOC:
2355 ht_conf->single_chain_sufficient = true;
2356 break;
2357 default:
2358 break;
2359 }
2360
2361 IWL_DEBUG_ASSOC(priv, "leave\n");
2362 }
2363
2364 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2365 struct ieee80211_vif *vif)
2366 {
2367 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2368
2369 /*
2370 * inform the ucode that there is no longer an
2371 * association and that no more packets should be
2372 * sent
2373 */
2374 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2375 ctx->staging.assoc_id = 0;
2376 iwl_legacy_commit_rxon(priv, ctx);
2377 }
2378
2379 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2380 struct ieee80211_vif *vif)
2381 {
2382 struct iwl_priv *priv = hw->priv;
2383 unsigned long flags;
2384 __le64 timestamp;
2385 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2386
2387 if (!skb)
2388 return;
2389
2390 IWL_DEBUG_MAC80211(priv, "enter\n");
2391
2392 lockdep_assert_held(&priv->mutex);
2393
2394 if (!priv->beacon_ctx) {
2395 IWL_ERR(priv, "update beacon but no beacon context!\n");
2396 dev_kfree_skb(skb);
2397 return;
2398 }
2399
2400 spin_lock_irqsave(&priv->lock, flags);
2401
2402 if (priv->beacon_skb)
2403 dev_kfree_skb(priv->beacon_skb);
2404
2405 priv->beacon_skb = skb;
2406
2407 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2408 priv->timestamp = le64_to_cpu(timestamp);
2409
2410 IWL_DEBUG_MAC80211(priv, "leave\n");
2411 spin_unlock_irqrestore(&priv->lock, flags);
2412
2413 if (!iwl_legacy_is_ready_rf(priv)) {
2414 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2415 return;
2416 }
2417
2418 priv->cfg->ops->legacy->post_associate(priv);
2419 }
2420
2421 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2422 struct ieee80211_vif *vif,
2423 struct ieee80211_bss_conf *bss_conf,
2424 u32 changes)
2425 {
2426 struct iwl_priv *priv = hw->priv;
2427 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2428 int ret;
2429
2430 if (WARN_ON(!priv->cfg->ops->legacy))
2431 return;
2432
2433 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2434
2435 mutex_lock(&priv->mutex);
2436
2437 if (!iwl_legacy_is_alive(priv)) {
2438 mutex_unlock(&priv->mutex);
2439 return;
2440 }
2441
2442 if (changes & BSS_CHANGED_QOS) {
2443 unsigned long flags;
2444
2445 spin_lock_irqsave(&priv->lock, flags);
2446 ctx->qos_data.qos_active = bss_conf->qos;
2447 iwl_legacy_update_qos(priv, ctx);
2448 spin_unlock_irqrestore(&priv->lock, flags);
2449 }
2450
2451 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2452 /*
2453 * the add_interface code must make sure we only ever
2454 * have a single interface that could be beaconing at
2455 * any time.
2456 */
2457 if (vif->bss_conf.enable_beacon)
2458 priv->beacon_ctx = ctx;
2459 else
2460 priv->beacon_ctx = NULL;
2461 }
2462
2463 if (changes & BSS_CHANGED_BSSID) {
2464 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2465
2466 /*
2467 * If there is currently a HW scan going on in the
2468 * background then we need to cancel it else the RXON
2469 * below/in post_associate will fail.
2470 */
2471 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2472 IWL_WARN(priv,
2473 "Aborted scan still in progress after 100ms\n");
2474 IWL_DEBUG_MAC80211(priv,
2475 "leaving - scan abort failed.\n");
2476 mutex_unlock(&priv->mutex);
2477 return;
2478 }
2479
2480 /* mac80211 only sets assoc when in STATION mode */
2481 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2482 memcpy(ctx->staging.bssid_addr,
2483 bss_conf->bssid, ETH_ALEN);
2484
2485 /* currently needed in a few places */
2486 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2487 } else {
2488 ctx->staging.filter_flags &=
2489 ~RXON_FILTER_ASSOC_MSK;
2490 }
2491
2492 }
2493
2494 /*
2495 * This needs to be after setting the BSSID in case
2496 * mac80211 decides to do both changes at once because
2497 * it will invoke post_associate.
2498 */
2499 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2500 iwl_legacy_beacon_update(hw, vif);
2501
2502 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2503 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2504 bss_conf->use_short_preamble);
2505 if (bss_conf->use_short_preamble)
2506 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2507 else
2508 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2509 }
2510
2511 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2512 IWL_DEBUG_MAC80211(priv,
2513 "ERP_CTS %d\n", bss_conf->use_cts_prot);
2514 if (bss_conf->use_cts_prot &&
2515 (priv->band != IEEE80211_BAND_5GHZ))
2516 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2517 else
2518 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2519 if (bss_conf->use_cts_prot)
2520 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2521 else
2522 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2523 }
2524
2525 if (changes & BSS_CHANGED_BASIC_RATES) {
2526 /* XXX use this information
2527 *
2528 * To do that, remove code from iwl_legacy_set_rate() and put something
2529 * like this here:
2530 *
2531 if (A-band)
2532 ctx->staging.ofdm_basic_rates =
2533 bss_conf->basic_rates;
2534 else
2535 ctx->staging.ofdm_basic_rates =
2536 bss_conf->basic_rates >> 4;
2537 ctx->staging.cck_basic_rates =
2538 bss_conf->basic_rates & 0xF;
2539 */
2540 }
2541
2542 if (changes & BSS_CHANGED_HT) {
2543 iwl_legacy_ht_conf(priv, vif);
2544
2545 if (priv->cfg->ops->hcmd->set_rxon_chain)
2546 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2547 }
2548
2549 if (changes & BSS_CHANGED_ASSOC) {
2550 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2551 if (bss_conf->assoc) {
2552 priv->timestamp = bss_conf->timestamp;
2553
2554 if (!iwl_legacy_is_rfkill(priv))
2555 priv->cfg->ops->legacy->post_associate(priv);
2556 } else
2557 iwl_legacy_set_no_assoc(priv, vif);
2558 }
2559
2560 if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2561 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2562 changes);
2563 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2564 if (!ret) {
2565 /* Sync active_rxon with latest change. */
2566 memcpy((void *)&ctx->active,
2567 &ctx->staging,
2568 sizeof(struct iwl_legacy_rxon_cmd));
2569 }
2570 }
2571
2572 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2573 if (vif->bss_conf.enable_beacon) {
2574 memcpy(ctx->staging.bssid_addr,
2575 bss_conf->bssid, ETH_ALEN);
2576 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2577 priv->cfg->ops->legacy->config_ap(priv);
2578 } else
2579 iwl_legacy_set_no_assoc(priv, vif);
2580 }
2581
2582 if (changes & BSS_CHANGED_IBSS) {
2583 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2584 bss_conf->ibss_joined);
2585 if (ret)
2586 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2587 bss_conf->ibss_joined ? "add" : "remove",
2588 bss_conf->bssid);
2589 }
2590
2591 mutex_unlock(&priv->mutex);
2592
2593 IWL_DEBUG_MAC80211(priv, "leave\n");
2594 }
2595 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2596
2597 irqreturn_t iwl_legacy_isr(int irq, void *data)
2598 {
2599 struct iwl_priv *priv = data;
2600 u32 inta, inta_mask;
2601 u32 inta_fh;
2602 unsigned long flags;
2603 if (!priv)
2604 return IRQ_NONE;
2605
2606 spin_lock_irqsave(&priv->lock, flags);
2607
2608 /* Disable (but don't clear!) interrupts here to avoid
2609 * back-to-back ISRs and sporadic interrupts from our NIC.
2610 * If we have something to service, the tasklet will re-enable ints.
2611 * If we *don't* have something, we'll re-enable before leaving here. */
2612 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
2613 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2614
2615 /* Discover which interrupts are active/pending */
2616 inta = iwl_read32(priv, CSR_INT);
2617 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2618
2619 /* Ignore interrupt if there's nothing in NIC to service.
2620 * This may be due to IRQ shared with another device,
2621 * or due to sporadic interrupts thrown from our NIC. */
2622 if (!inta && !inta_fh) {
2623 IWL_DEBUG_ISR(priv,
2624 "Ignore interrupt, inta == 0, inta_fh == 0\n");
2625 goto none;
2626 }
2627
2628 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2629 /* Hardware disappeared. It might have already raised
2630 * an interrupt */
2631 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2632 goto unplugged;
2633 }
2634
2635 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2636 inta, inta_mask, inta_fh);
2637
2638 inta &= ~CSR_INT_BIT_SCD;
2639
2640 /* iwl_irq_tasklet() will service interrupts and re-enable them */
2641 if (likely(inta || inta_fh))
2642 tasklet_schedule(&priv->irq_tasklet);
2643
2644 unplugged:
2645 spin_unlock_irqrestore(&priv->lock, flags);
2646 return IRQ_HANDLED;
2647
2648 none:
2649 /* re-enable interrupts here since we don't have anything to service. */
2650 /* only Re-enable if disabled by irq */
2651 if (test_bit(STATUS_INT_ENABLED, &priv->status))
2652 iwl_legacy_enable_interrupts(priv);
2653 spin_unlock_irqrestore(&priv->lock, flags);
2654 return IRQ_NONE;
2655 }
2656 EXPORT_SYMBOL(iwl_legacy_isr);
2657
2658 /*
2659 * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2660 * function.
2661 */
2662 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2663 struct ieee80211_tx_info *info,
2664 __le16 fc, __le32 *tx_flags)
2665 {
2666 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2667 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2668 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2669 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2670
2671 if (!ieee80211_is_mgmt(fc))
2672 return;
2673
2674 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2675 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2676 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2677 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2678 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2679 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2680 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2681 break;
2682 }
2683 } else if (info->control.rates[0].flags &
2684 IEEE80211_TX_RC_USE_CTS_PROTECT) {
2685 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2686 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2687 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2688 }
2689 }
2690 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree