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Fix common misspellings
[deliverable/linux.git] / drivers / net / wireless / iwlegacy / iwl-core.c
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
164 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
165 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
166 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
167 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
168 return 0;
169 }
170
171 channels = kzalloc(sizeof(struct ieee80211_channel) *
172 priv->channel_count, GFP_KERNEL);
173 if (!channels)
174 return -ENOMEM;
175
176 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
177 GFP_KERNEL);
178 if (!rates) {
179 kfree(channels);
180 return -ENOMEM;
181 }
182
183 /* 5.2GHz channels start after the 2.4GHz channels */
184 sband = &priv->bands[IEEE80211_BAND_5GHZ];
185 sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
186 /* just OFDM */
187 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
188 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
189
190 if (priv->cfg->sku & IWL_SKU_N)
191 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
192 IEEE80211_BAND_5GHZ);
193
194 sband = &priv->bands[IEEE80211_BAND_2GHZ];
195 sband->channels = channels;
196 /* OFDM & CCK */
197 sband->bitrates = rates;
198 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
199
200 if (priv->cfg->sku & IWL_SKU_N)
201 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
202 IEEE80211_BAND_2GHZ);
203
204 priv->ieee_channels = channels;
205 priv->ieee_rates = rates;
206
207 for (i = 0; i < priv->channel_count; i++) {
208 ch = &priv->channel_info[i];
209
210 if (!iwl_legacy_is_channel_valid(ch))
211 continue;
212
213 if (iwl_legacy_is_channel_a_band(ch))
214 sband = &priv->bands[IEEE80211_BAND_5GHZ];
215 else
216 sband = &priv->bands[IEEE80211_BAND_2GHZ];
217
218 geo_ch = &sband->channels[sband->n_channels++];
219
220 geo_ch->center_freq =
221 ieee80211_channel_to_frequency(ch->channel, ch->band);
222 geo_ch->max_power = ch->max_power_avg;
223 geo_ch->max_antenna_gain = 0xff;
224 geo_ch->hw_value = ch->channel;
225
226 if (iwl_legacy_is_channel_valid(ch)) {
227 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
228 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
229
230 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
231 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
232
233 if (ch->flags & EEPROM_CHANNEL_RADAR)
234 geo_ch->flags |= IEEE80211_CHAN_RADAR;
235
236 geo_ch->flags |= ch->ht40_extension_channel;
237
238 if (ch->max_power_avg > priv->tx_power_device_lmt)
239 priv->tx_power_device_lmt = ch->max_power_avg;
240 } else {
241 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
242 }
243
244 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
245 ch->channel, geo_ch->center_freq,
246 iwl_legacy_is_channel_a_band(ch) ? "5.2" : "2.4",
247 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
248 "restricted" : "valid",
249 geo_ch->flags);
250 }
251
252 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
253 priv->cfg->sku & IWL_SKU_A) {
254 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
255 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
256 priv->pci_dev->device,
257 priv->pci_dev->subsystem_device);
258 priv->cfg->sku &= ~IWL_SKU_A;
259 }
260
261 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
262 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
263 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
264
265 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
266
267 return 0;
268 }
269 EXPORT_SYMBOL(iwl_legacy_init_geos);
270
271 /*
272 * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
273 */
274 void iwl_legacy_free_geos(struct iwl_priv *priv)
275 {
276 kfree(priv->ieee_channels);
277 kfree(priv->ieee_rates);
278 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
279 }
280 EXPORT_SYMBOL(iwl_legacy_free_geos);
281
282 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
283 enum ieee80211_band band,
284 u16 channel, u8 extension_chan_offset)
285 {
286 const struct iwl_channel_info *ch_info;
287
288 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
289 if (!iwl_legacy_is_channel_valid(ch_info))
290 return false;
291
292 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
293 return !(ch_info->ht40_extension_channel &
294 IEEE80211_CHAN_NO_HT40PLUS);
295 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
296 return !(ch_info->ht40_extension_channel &
297 IEEE80211_CHAN_NO_HT40MINUS);
298
299 return false;
300 }
301
302 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
303 struct iwl_rxon_context *ctx,
304 struct ieee80211_sta_ht_cap *ht_cap)
305 {
306 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
307 return false;
308
309 /*
310 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
311 * the bit will not set if it is pure 40MHz case
312 */
313 if (ht_cap && !ht_cap->ht_supported)
314 return false;
315
316 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
317 if (priv->disable_ht40)
318 return false;
319 #endif
320
321 return iwl_legacy_is_channel_extension(priv, priv->band,
322 le16_to_cpu(ctx->staging.channel),
323 ctx->ht.extension_chan_offset);
324 }
325 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
326
327 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
328 {
329 u16 new_val;
330 u16 beacon_factor;
331
332 /*
333 * If mac80211 hasn't given us a beacon interval, program
334 * the default into the device.
335 */
336 if (!beacon_val)
337 return DEFAULT_BEACON_INTERVAL;
338
339 /*
340 * If the beacon interval we obtained from the peer
341 * is too large, we'll have to wake up more often
342 * (and in IBSS case, we'll beacon too much)
343 *
344 * For example, if max_beacon_val is 4096, and the
345 * requested beacon interval is 7000, we'll have to
346 * use 3500 to be able to wake up on the beacons.
347 *
348 * This could badly influence beacon detection stats.
349 */
350
351 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
352 new_val = beacon_val / beacon_factor;
353
354 if (!new_val)
355 new_val = max_beacon_val;
356
357 return new_val;
358 }
359
360 int
361 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
362 {
363 u64 tsf;
364 s32 interval_tm, rem;
365 struct ieee80211_conf *conf = NULL;
366 u16 beacon_int;
367 struct ieee80211_vif *vif = ctx->vif;
368
369 conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
370
371 lockdep_assert_held(&priv->mutex);
372
373 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
374
375 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
376 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
377
378 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
379
380 /*
381 * TODO: For IBSS we need to get atim_window from mac80211,
382 * for now just always use 0
383 */
384 ctx->timing.atim_window = 0;
385
386 beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
387 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
388 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
389
390 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
391 interval_tm = beacon_int * TIME_UNIT;
392 rem = do_div(tsf, interval_tm);
393 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
394
395 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
396
397 IWL_DEBUG_ASSOC(priv,
398 "beacon interval %d beacon timer %d beacon tim %d\n",
399 le16_to_cpu(ctx->timing.beacon_interval),
400 le32_to_cpu(ctx->timing.beacon_init_val),
401 le16_to_cpu(ctx->timing.atim_window));
402
403 return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
404 sizeof(ctx->timing), &ctx->timing);
405 }
406 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
407
408 void
409 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
410 struct iwl_rxon_context *ctx,
411 int hw_decrypt)
412 {
413 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
414
415 if (hw_decrypt)
416 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
417 else
418 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
419
420 }
421 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
422
423 /* validate RXON structure is valid */
424 int
425 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
426 {
427 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
428 bool error = false;
429
430 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
431 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
432 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
433 error = true;
434 }
435 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
436 IWL_WARN(priv, "check 2.4G: wrong radar\n");
437 error = true;
438 }
439 } else {
440 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
441 IWL_WARN(priv, "check 5.2G: not short slot!\n");
442 error = true;
443 }
444 if (rxon->flags & RXON_FLG_CCK_MSK) {
445 IWL_WARN(priv, "check 5.2G: CCK!\n");
446 error = true;
447 }
448 }
449 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
450 IWL_WARN(priv, "mac/bssid mcast!\n");
451 error = true;
452 }
453
454 /* make sure basic rates 6Mbps and 1Mbps are supported */
455 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
456 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
457 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
458 error = true;
459 }
460
461 if (le16_to_cpu(rxon->assoc_id) > 2007) {
462 IWL_WARN(priv, "aid > 2007\n");
463 error = true;
464 }
465
466 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
467 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
468 IWL_WARN(priv, "CCK and short slot\n");
469 error = true;
470 }
471
472 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
473 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
474 IWL_WARN(priv, "CCK and auto detect");
475 error = true;
476 }
477
478 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
479 RXON_FLG_TGG_PROTECT_MSK)) ==
480 RXON_FLG_TGG_PROTECT_MSK) {
481 IWL_WARN(priv, "TGg but no auto-detect\n");
482 error = true;
483 }
484
485 if (error)
486 IWL_WARN(priv, "Tuning to channel %d\n",
487 le16_to_cpu(rxon->channel));
488
489 if (error) {
490 IWL_ERR(priv, "Invalid RXON\n");
491 return -EINVAL;
492 }
493 return 0;
494 }
495 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
496
497 /**
498 * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
499 * @priv: staging_rxon is compared to active_rxon
500 *
501 * If the RXON structure is changing enough to require a new tune,
502 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
503 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
504 */
505 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
506 struct iwl_rxon_context *ctx)
507 {
508 const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
509 const struct iwl_legacy_rxon_cmd *active = &ctx->active;
510
511 #define CHK(cond) \
512 if ((cond)) { \
513 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
514 return 1; \
515 }
516
517 #define CHK_NEQ(c1, c2) \
518 if ((c1) != (c2)) { \
519 IWL_DEBUG_INFO(priv, "need full RXON - " \
520 #c1 " != " #c2 " - %d != %d\n", \
521 (c1), (c2)); \
522 return 1; \
523 }
524
525 /* These items are only settable from the full RXON command */
526 CHK(!iwl_legacy_is_associated_ctx(ctx));
527 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
528 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
529 CHK(compare_ether_addr(staging->wlap_bssid_addr,
530 active->wlap_bssid_addr));
531 CHK_NEQ(staging->dev_type, active->dev_type);
532 CHK_NEQ(staging->channel, active->channel);
533 CHK_NEQ(staging->air_propagation, active->air_propagation);
534 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
535 active->ofdm_ht_single_stream_basic_rates);
536 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
537 active->ofdm_ht_dual_stream_basic_rates);
538 CHK_NEQ(staging->assoc_id, active->assoc_id);
539
540 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
541 * be updated with the RXON_ASSOC command -- however only some
542 * flag transitions are allowed using RXON_ASSOC */
543
544 /* Check if we are not switching bands */
545 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
546 active->flags & RXON_FLG_BAND_24G_MSK);
547
548 /* Check if we are switching association toggle */
549 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
550 active->filter_flags & RXON_FILTER_ASSOC_MSK);
551
552 #undef CHK
553 #undef CHK_NEQ
554
555 return 0;
556 }
557 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
558
559 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
560 struct iwl_rxon_context *ctx)
561 {
562 /*
563 * Assign the lowest rate -- should really get this from
564 * the beacon skb from mac80211.
565 */
566 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
567 return IWL_RATE_1M_PLCP;
568 else
569 return IWL_RATE_6M_PLCP;
570 }
571 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
572
573 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
574 struct iwl_ht_config *ht_conf,
575 struct iwl_rxon_context *ctx)
576 {
577 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
578
579 if (!ctx->ht.enabled) {
580 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
581 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
582 RXON_FLG_HT40_PROT_MSK |
583 RXON_FLG_HT_PROT_MSK);
584 return;
585 }
586
587 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
588 RXON_FLG_HT_OPERATING_MODE_POS);
589
590 /* Set up channel bandwidth:
591 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
592 /* clear the HT channel mode before set the mode */
593 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
594 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
595 if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
596 /* pure ht40 */
597 if (ctx->ht.protection ==
598 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
599 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
600 /* Note: control channel is opposite of extension channel */
601 switch (ctx->ht.extension_chan_offset) {
602 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
603 rxon->flags &=
604 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
605 break;
606 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
607 rxon->flags |=
608 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
609 break;
610 }
611 } else {
612 /* Note: control channel is opposite of extension channel */
613 switch (ctx->ht.extension_chan_offset) {
614 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
615 rxon->flags &=
616 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
617 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
618 break;
619 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
620 rxon->flags |=
621 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
622 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
623 break;
624 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
625 default:
626 /* channel location only valid if in Mixed mode */
627 IWL_ERR(priv,
628 "invalid extension channel offset\n");
629 break;
630 }
631 }
632 } else {
633 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
634 }
635
636 if (priv->cfg->ops->hcmd->set_rxon_chain)
637 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
638
639 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
640 "extension channel offset 0x%x\n",
641 le32_to_cpu(rxon->flags), ctx->ht.protection,
642 ctx->ht.extension_chan_offset);
643 }
644
645 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
646 {
647 struct iwl_rxon_context *ctx;
648
649 for_each_context(priv, ctx)
650 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
651 }
652 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
653
654 /* Return valid, unused, channel for a passive scan to reset the RF */
655 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
656 enum ieee80211_band band)
657 {
658 const struct iwl_channel_info *ch_info;
659 int i;
660 u8 channel = 0;
661 u8 min, max;
662 struct iwl_rxon_context *ctx;
663
664 if (band == IEEE80211_BAND_5GHZ) {
665 min = 14;
666 max = priv->channel_count;
667 } else {
668 min = 0;
669 max = 14;
670 }
671
672 for (i = min; i < max; i++) {
673 bool busy = false;
674
675 for_each_context(priv, ctx) {
676 busy = priv->channel_info[i].channel ==
677 le16_to_cpu(ctx->staging.channel);
678 if (busy)
679 break;
680 }
681
682 if (busy)
683 continue;
684
685 channel = priv->channel_info[i].channel;
686 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
687 if (iwl_legacy_is_channel_valid(ch_info))
688 break;
689 }
690
691 return channel;
692 }
693 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
694
695 /**
696 * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
697 * @ch: requested channel as a pointer to struct ieee80211_channel
698
699 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
700 * in the staging RXON flag structure based on the ch->band
701 */
702 int
703 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
704 struct iwl_rxon_context *ctx)
705 {
706 enum ieee80211_band band = ch->band;
707 u16 channel = ch->hw_value;
708
709 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
710 (priv->band == band))
711 return 0;
712
713 ctx->staging.channel = cpu_to_le16(channel);
714 if (band == IEEE80211_BAND_5GHZ)
715 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
716 else
717 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
718
719 priv->band = band;
720
721 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
722
723 return 0;
724 }
725 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
726
727 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
728 struct iwl_rxon_context *ctx,
729 enum ieee80211_band band,
730 struct ieee80211_vif *vif)
731 {
732 if (band == IEEE80211_BAND_5GHZ) {
733 ctx->staging.flags &=
734 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
735 | RXON_FLG_CCK_MSK);
736 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
737 } else {
738 /* Copied from iwl_post_associate() */
739 if (vif && vif->bss_conf.use_short_slot)
740 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
741 else
742 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
743
744 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
745 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
746 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
747 }
748 }
749 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
750
751 /*
752 * initialize rxon structure with default values from eeprom
753 */
754 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
755 struct iwl_rxon_context *ctx)
756 {
757 const struct iwl_channel_info *ch_info;
758
759 memset(&ctx->staging, 0, sizeof(ctx->staging));
760
761 if (!ctx->vif) {
762 ctx->staging.dev_type = ctx->unused_devtype;
763 } else
764 switch (ctx->vif->type) {
765
766 case NL80211_IFTYPE_STATION:
767 ctx->staging.dev_type = ctx->station_devtype;
768 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
769 break;
770
771 case NL80211_IFTYPE_ADHOC:
772 ctx->staging.dev_type = ctx->ibss_devtype;
773 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
774 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
775 RXON_FILTER_ACCEPT_GRP_MSK;
776 break;
777
778 default:
779 IWL_ERR(priv, "Unsupported interface type %d\n",
780 ctx->vif->type);
781 break;
782 }
783
784 #if 0
785 /* TODO: Figure out when short_preamble would be set and cache from
786 * that */
787 if (!hw_to_local(priv->hw)->short_preamble)
788 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
789 else
790 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
791 #endif
792
793 ch_info = iwl_legacy_get_channel_info(priv, priv->band,
794 le16_to_cpu(ctx->active.channel));
795
796 if (!ch_info)
797 ch_info = &priv->channel_info[0];
798
799 ctx->staging.channel = cpu_to_le16(ch_info->channel);
800 priv->band = ch_info->band;
801
802 iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
803
804 ctx->staging.ofdm_basic_rates =
805 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
806 ctx->staging.cck_basic_rates =
807 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
808
809 /* clear both MIX and PURE40 mode flag */
810 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
811 RXON_FLG_CHANNEL_MODE_PURE_40);
812 if (ctx->vif)
813 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
814
815 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
816 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
817 }
818 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
819
820 void iwl_legacy_set_rate(struct iwl_priv *priv)
821 {
822 const struct ieee80211_supported_band *hw = NULL;
823 struct ieee80211_rate *rate;
824 struct iwl_rxon_context *ctx;
825 int i;
826
827 hw = iwl_get_hw_mode(priv, priv->band);
828 if (!hw) {
829 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
830 return;
831 }
832
833 priv->active_rate = 0;
834
835 for (i = 0; i < hw->n_bitrates; i++) {
836 rate = &(hw->bitrates[i]);
837 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
838 priv->active_rate |= (1 << rate->hw_value);
839 }
840
841 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
842
843 for_each_context(priv, ctx) {
844 ctx->staging.cck_basic_rates =
845 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
846
847 ctx->staging.ofdm_basic_rates =
848 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
849 }
850 }
851 EXPORT_SYMBOL(iwl_legacy_set_rate);
852
853 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
854 {
855 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
856
857 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
858 return;
859
860 if (priv->switch_rxon.switch_in_progress) {
861 ieee80211_chswitch_done(ctx->vif, is_success);
862 mutex_lock(&priv->mutex);
863 priv->switch_rxon.switch_in_progress = false;
864 mutex_unlock(&priv->mutex);
865 }
866 }
867 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
868
869 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
870 {
871 struct iwl_rx_packet *pkt = rxb_addr(rxb);
872 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
873
874 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
875 struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
876
877 if (priv->switch_rxon.switch_in_progress) {
878 if (!le32_to_cpu(csa->status) &&
879 (csa->channel == priv->switch_rxon.channel)) {
880 rxon->channel = csa->channel;
881 ctx->staging.channel = csa->channel;
882 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
883 le16_to_cpu(csa->channel));
884 iwl_legacy_chswitch_done(priv, true);
885 } else {
886 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
887 le16_to_cpu(csa->channel));
888 iwl_legacy_chswitch_done(priv, false);
889 }
890 }
891 }
892 EXPORT_SYMBOL(iwl_legacy_rx_csa);
893
894 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
895 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
896 struct iwl_rxon_context *ctx)
897 {
898 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
899
900 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
901 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
902 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
903 le16_to_cpu(rxon->channel));
904 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
905 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
906 le32_to_cpu(rxon->filter_flags));
907 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
908 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
909 rxon->ofdm_basic_rates);
910 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
911 rxon->cck_basic_rates);
912 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
913 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
914 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
915 le16_to_cpu(rxon->assoc_id));
916 }
917 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
918 #endif
919 /**
920 * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
921 */
922 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
923 {
924 /* Set the FW error flag -- cleared on iwl_down */
925 set_bit(STATUS_FW_ERROR, &priv->status);
926
927 /* Cancel currently queued command. */
928 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
929
930 IWL_ERR(priv, "Loaded firmware version: %s\n",
931 priv->hw->wiphy->fw_version);
932
933 priv->cfg->ops->lib->dump_nic_error_log(priv);
934 if (priv->cfg->ops->lib->dump_fh)
935 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
936 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
937 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
938 if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
939 iwl_legacy_print_rx_config_cmd(priv,
940 &priv->contexts[IWL_RXON_CTX_BSS]);
941 #endif
942
943 wake_up_interruptible(&priv->wait_command_queue);
944
945 /* Keep the restart process from trying to send host
946 * commands by clearing the INIT status bit */
947 clear_bit(STATUS_READY, &priv->status);
948
949 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
950 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
951 "Restarting adapter due to uCode error.\n");
952
953 if (priv->cfg->mod_params->restart_fw)
954 queue_work(priv->workqueue, &priv->restart);
955 }
956 }
957 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
958
959 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
960 {
961 int ret = 0;
962
963 /* stop device's busmaster DMA activity */
964 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
965
966 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
967 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
968 if (ret)
969 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
970
971 IWL_DEBUG_INFO(priv, "stop master\n");
972
973 return ret;
974 }
975
976 void iwl_legacy_apm_stop(struct iwl_priv *priv)
977 {
978 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
979
980 /* Stop device's DMA activity */
981 iwl_legacy_apm_stop_master(priv);
982
983 /* Reset the entire device */
984 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
985
986 udelay(10);
987
988 /*
989 * Clear "initialization complete" bit to move adapter from
990 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
991 */
992 iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
993 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
994 }
995 EXPORT_SYMBOL(iwl_legacy_apm_stop);
996
997
998 /*
999 * Start up NIC's basic functionality after it has been reset
1000 * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
1001 * NOTE: This does not load uCode nor start the embedded processor
1002 */
1003 int iwl_legacy_apm_init(struct iwl_priv *priv)
1004 {
1005 int ret = 0;
1006 u16 lctl;
1007
1008 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1009
1010 /*
1011 * Use "set_bit" below rather than "write", to preserve any hardware
1012 * bits already set by default after reset.
1013 */
1014
1015 /* Disable L0S exit timer (platform NMI Work/Around) */
1016 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1017 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1018
1019 /*
1020 * Disable L0s without affecting L1;
1021 * don't wait for ICH L0s (ICH bug W/A)
1022 */
1023 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1024 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1025
1026 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1027 iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1028 CSR_DBG_HPET_MEM_REG_VAL);
1029
1030 /*
1031 * Enable HAP INTA (interrupt from management bus) to
1032 * wake device's PCI Express link L1a -> L0s
1033 * NOTE: This is no-op for 3945 (non-existent bit)
1034 */
1035 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1036 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1037
1038 /*
1039 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1040 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1041 * If so (likely), disable L0S, so device moves directly L0->L1;
1042 * costs negligible amount of power savings.
1043 * If not (unlikely), enable L0S, so there is at least some
1044 * power savings, even without L1.
1045 */
1046 if (priv->cfg->base_params->set_l0s) {
1047 lctl = iwl_legacy_pcie_link_ctl(priv);
1048 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1049 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1050 /* L1-ASPM enabled; disable(!) L0S */
1051 iwl_legacy_set_bit(priv, CSR_GIO_REG,
1052 CSR_GIO_REG_VAL_L0S_ENABLED);
1053 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1054 } else {
1055 /* L1-ASPM disabled; enable(!) L0S */
1056 iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1057 CSR_GIO_REG_VAL_L0S_ENABLED);
1058 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1059 }
1060 }
1061
1062 /* Configure analog phase-lock-loop before activating to D0A */
1063 if (priv->cfg->base_params->pll_cfg_val)
1064 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1065 priv->cfg->base_params->pll_cfg_val);
1066
1067 /*
1068 * Set "initialization complete" bit to move adapter from
1069 * D0U* --> D0A* (powered-up active) state.
1070 */
1071 iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1072
1073 /*
1074 * Wait for clock stabilization; once stabilized, access to
1075 * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1076 * and accesses to uCode SRAM.
1077 */
1078 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1079 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1080 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1081 if (ret < 0) {
1082 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1083 goto out;
1084 }
1085
1086 /*
1087 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1088 * BSM (Boostrap State Machine) is only in 3945 and 4965.
1089 *
1090 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1091 * do not disable clocks. This preserves any hardware bits already
1092 * set by default in "CLK_CTRL_REG" after reset.
1093 */
1094 if (priv->cfg->base_params->use_bsm)
1095 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1096 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1097 else
1098 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1099 APMG_CLK_VAL_DMA_CLK_RQT);
1100 udelay(20);
1101
1102 /* Disable L1-Active */
1103 iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1104 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1105
1106 out:
1107 return ret;
1108 }
1109 EXPORT_SYMBOL(iwl_legacy_apm_init);
1110
1111
1112 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1113 {
1114 int ret;
1115 s8 prev_tx_power;
1116 bool defer;
1117 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1118
1119 lockdep_assert_held(&priv->mutex);
1120
1121 if (priv->tx_power_user_lmt == tx_power && !force)
1122 return 0;
1123
1124 if (!priv->cfg->ops->lib->send_tx_power)
1125 return -EOPNOTSUPP;
1126
1127 if (tx_power < IWL4965_TX_POWER_TARGET_POWER_MIN) {
1128 IWL_WARN(priv,
1129 "Requested user TXPOWER %d below lower limit %d.\n",
1130 tx_power,
1131 IWL4965_TX_POWER_TARGET_POWER_MIN);
1132 return -EINVAL;
1133 }
1134
1135 if (tx_power > priv->tx_power_device_lmt) {
1136 IWL_WARN(priv,
1137 "Requested user TXPOWER %d above upper limit %d.\n",
1138 tx_power, priv->tx_power_device_lmt);
1139 return -EINVAL;
1140 }
1141
1142 if (!iwl_legacy_is_ready_rf(priv))
1143 return -EIO;
1144
1145 /* scan complete and commit_rxon use tx_power_next value,
1146 * it always need to be updated for newest request */
1147 priv->tx_power_next = tx_power;
1148
1149 /* do not set tx power when scanning or channel changing */
1150 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1151 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1152 if (defer && !force) {
1153 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1154 return 0;
1155 }
1156
1157 prev_tx_power = priv->tx_power_user_lmt;
1158 priv->tx_power_user_lmt = tx_power;
1159
1160 ret = priv->cfg->ops->lib->send_tx_power(priv);
1161
1162 /* if fail to set tx_power, restore the orig. tx power */
1163 if (ret) {
1164 priv->tx_power_user_lmt = prev_tx_power;
1165 priv->tx_power_next = prev_tx_power;
1166 }
1167 return ret;
1168 }
1169 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1170
1171 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1172 {
1173 struct iwl_bt_cmd bt_cmd = {
1174 .lead_time = BT_LEAD_TIME_DEF,
1175 .max_kill = BT_MAX_KILL_DEF,
1176 .kill_ack_mask = 0,
1177 .kill_cts_mask = 0,
1178 };
1179
1180 if (!bt_coex_active)
1181 bt_cmd.flags = BT_COEX_DISABLE;
1182 else
1183 bt_cmd.flags = BT_COEX_ENABLE;
1184
1185 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1186 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1187
1188 if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1189 sizeof(struct iwl_bt_cmd), &bt_cmd))
1190 IWL_ERR(priv, "failed to send BT Coex Config\n");
1191 }
1192 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1193
1194 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1195 {
1196 struct iwl_statistics_cmd statistics_cmd = {
1197 .configuration_flags =
1198 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1199 };
1200
1201 if (flags & CMD_ASYNC)
1202 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1203 sizeof(struct iwl_statistics_cmd),
1204 &statistics_cmd, NULL);
1205 else
1206 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1207 sizeof(struct iwl_statistics_cmd),
1208 &statistics_cmd);
1209 }
1210 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1211
1212 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1213 struct iwl_rx_mem_buffer *rxb)
1214 {
1215 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1216 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1217 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1218 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1219 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1220 #endif
1221 }
1222 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1223
1224 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1225 struct iwl_rx_mem_buffer *rxb)
1226 {
1227 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1228 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1229 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1230 "notification for %s:\n", len,
1231 iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1232 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1233 }
1234 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1235
1236 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1237 struct iwl_rx_mem_buffer *rxb)
1238 {
1239 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1240
1241 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1242 "seq 0x%04X ser 0x%08X\n",
1243 le32_to_cpu(pkt->u.err_resp.error_type),
1244 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1245 pkt->u.err_resp.cmd_id,
1246 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1247 le32_to_cpu(pkt->u.err_resp.error_info));
1248 }
1249 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1250
1251 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1252 {
1253 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1254 }
1255
1256 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1257 const struct ieee80211_tx_queue_params *params)
1258 {
1259 struct iwl_priv *priv = hw->priv;
1260 struct iwl_rxon_context *ctx;
1261 unsigned long flags;
1262 int q;
1263
1264 IWL_DEBUG_MAC80211(priv, "enter\n");
1265
1266 if (!iwl_legacy_is_ready_rf(priv)) {
1267 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1268 return -EIO;
1269 }
1270
1271 if (queue >= AC_NUM) {
1272 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1273 return 0;
1274 }
1275
1276 q = AC_NUM - 1 - queue;
1277
1278 spin_lock_irqsave(&priv->lock, flags);
1279
1280 for_each_context(priv, ctx) {
1281 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1282 cpu_to_le16(params->cw_min);
1283 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1284 cpu_to_le16(params->cw_max);
1285 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1286 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1287 cpu_to_le16((params->txop * 32));
1288
1289 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1290 }
1291
1292 spin_unlock_irqrestore(&priv->lock, flags);
1293
1294 IWL_DEBUG_MAC80211(priv, "leave\n");
1295 return 0;
1296 }
1297 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1298
1299 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1300 {
1301 struct iwl_priv *priv = hw->priv;
1302
1303 return priv->ibss_manager == IWL_IBSS_MANAGER;
1304 }
1305 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1306
1307 static int
1308 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1309 {
1310 iwl_legacy_connection_init_rx_config(priv, ctx);
1311
1312 if (priv->cfg->ops->hcmd->set_rxon_chain)
1313 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1314
1315 return iwl_legacy_commit_rxon(priv, ctx);
1316 }
1317
1318 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1319 struct iwl_rxon_context *ctx)
1320 {
1321 struct ieee80211_vif *vif = ctx->vif;
1322 int err;
1323
1324 lockdep_assert_held(&priv->mutex);
1325
1326 /*
1327 * This variable will be correct only when there's just
1328 * a single context, but all code using it is for hardware
1329 * that supports only one context.
1330 */
1331 priv->iw_mode = vif->type;
1332
1333 ctx->is_active = true;
1334
1335 err = iwl_legacy_set_mode(priv, ctx);
1336 if (err) {
1337 if (!ctx->always_active)
1338 ctx->is_active = false;
1339 return err;
1340 }
1341
1342 return 0;
1343 }
1344
1345 int
1346 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1347 {
1348 struct iwl_priv *priv = hw->priv;
1349 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1350 struct iwl_rxon_context *tmp, *ctx = NULL;
1351 int err;
1352
1353 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1354 vif->type, vif->addr);
1355
1356 mutex_lock(&priv->mutex);
1357
1358 if (!iwl_legacy_is_ready_rf(priv)) {
1359 IWL_WARN(priv, "Try to add interface when device not ready\n");
1360 err = -EINVAL;
1361 goto out;
1362 }
1363
1364 for_each_context(priv, tmp) {
1365 u32 possible_modes =
1366 tmp->interface_modes | tmp->exclusive_interface_modes;
1367
1368 if (tmp->vif) {
1369 /* check if this busy context is exclusive */
1370 if (tmp->exclusive_interface_modes &
1371 BIT(tmp->vif->type)) {
1372 err = -EINVAL;
1373 goto out;
1374 }
1375 continue;
1376 }
1377
1378 if (!(possible_modes & BIT(vif->type)))
1379 continue;
1380
1381 /* have maybe usable context w/o interface */
1382 ctx = tmp;
1383 break;
1384 }
1385
1386 if (!ctx) {
1387 err = -EOPNOTSUPP;
1388 goto out;
1389 }
1390
1391 vif_priv->ctx = ctx;
1392 ctx->vif = vif;
1393
1394 err = iwl_legacy_setup_interface(priv, ctx);
1395 if (!err)
1396 goto out;
1397
1398 ctx->vif = NULL;
1399 priv->iw_mode = NL80211_IFTYPE_STATION;
1400 out:
1401 mutex_unlock(&priv->mutex);
1402
1403 IWL_DEBUG_MAC80211(priv, "leave\n");
1404 return err;
1405 }
1406 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1407
1408 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1409 struct ieee80211_vif *vif,
1410 bool mode_change)
1411 {
1412 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1413
1414 lockdep_assert_held(&priv->mutex);
1415
1416 if (priv->scan_vif == vif) {
1417 iwl_legacy_scan_cancel_timeout(priv, 200);
1418 iwl_legacy_force_scan_end(priv);
1419 }
1420
1421 if (!mode_change) {
1422 iwl_legacy_set_mode(priv, ctx);
1423 if (!ctx->always_active)
1424 ctx->is_active = false;
1425 }
1426 }
1427
1428 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1429 struct ieee80211_vif *vif)
1430 {
1431 struct iwl_priv *priv = hw->priv;
1432 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1433
1434 IWL_DEBUG_MAC80211(priv, "enter\n");
1435
1436 mutex_lock(&priv->mutex);
1437
1438 WARN_ON(ctx->vif != vif);
1439 ctx->vif = NULL;
1440
1441 iwl_legacy_teardown_interface(priv, vif, false);
1442
1443 memset(priv->bssid, 0, ETH_ALEN);
1444 mutex_unlock(&priv->mutex);
1445
1446 IWL_DEBUG_MAC80211(priv, "leave\n");
1447
1448 }
1449 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1450
1451 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1452 {
1453 if (!priv->txq)
1454 priv->txq = kzalloc(
1455 sizeof(struct iwl_tx_queue) *
1456 priv->cfg->base_params->num_of_queues,
1457 GFP_KERNEL);
1458 if (!priv->txq) {
1459 IWL_ERR(priv, "Not enough memory for txq\n");
1460 return -ENOMEM;
1461 }
1462 return 0;
1463 }
1464 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1465
1466 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1467 {
1468 kfree(priv->txq);
1469 priv->txq = NULL;
1470 }
1471 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1472
1473 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1474
1475 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1476
1477 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1478 {
1479 priv->tx_traffic_idx = 0;
1480 priv->rx_traffic_idx = 0;
1481 if (priv->tx_traffic)
1482 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1483 if (priv->rx_traffic)
1484 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1485 }
1486
1487 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1488 {
1489 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1490
1491 if (iwlegacy_debug_level & IWL_DL_TX) {
1492 if (!priv->tx_traffic) {
1493 priv->tx_traffic =
1494 kzalloc(traffic_size, GFP_KERNEL);
1495 if (!priv->tx_traffic)
1496 return -ENOMEM;
1497 }
1498 }
1499 if (iwlegacy_debug_level & IWL_DL_RX) {
1500 if (!priv->rx_traffic) {
1501 priv->rx_traffic =
1502 kzalloc(traffic_size, GFP_KERNEL);
1503 if (!priv->rx_traffic)
1504 return -ENOMEM;
1505 }
1506 }
1507 iwl_legacy_reset_traffic_log(priv);
1508 return 0;
1509 }
1510 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1511
1512 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1513 {
1514 kfree(priv->tx_traffic);
1515 priv->tx_traffic = NULL;
1516
1517 kfree(priv->rx_traffic);
1518 priv->rx_traffic = NULL;
1519 }
1520 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1521
1522 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1523 u16 length, struct ieee80211_hdr *header)
1524 {
1525 __le16 fc;
1526 u16 len;
1527
1528 if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1529 return;
1530
1531 if (!priv->tx_traffic)
1532 return;
1533
1534 fc = header->frame_control;
1535 if (ieee80211_is_data(fc)) {
1536 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1537 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1538 memcpy((priv->tx_traffic +
1539 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1540 header, len);
1541 priv->tx_traffic_idx =
1542 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1543 }
1544 }
1545 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1546
1547 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1548 u16 length, struct ieee80211_hdr *header)
1549 {
1550 __le16 fc;
1551 u16 len;
1552
1553 if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1554 return;
1555
1556 if (!priv->rx_traffic)
1557 return;
1558
1559 fc = header->frame_control;
1560 if (ieee80211_is_data(fc)) {
1561 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1562 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1563 memcpy((priv->rx_traffic +
1564 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1565 header, len);
1566 priv->rx_traffic_idx =
1567 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1568 }
1569 }
1570 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1571
1572 const char *iwl_legacy_get_mgmt_string(int cmd)
1573 {
1574 switch (cmd) {
1575 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1576 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1577 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1578 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1579 IWL_CMD(MANAGEMENT_PROBE_REQ);
1580 IWL_CMD(MANAGEMENT_PROBE_RESP);
1581 IWL_CMD(MANAGEMENT_BEACON);
1582 IWL_CMD(MANAGEMENT_ATIM);
1583 IWL_CMD(MANAGEMENT_DISASSOC);
1584 IWL_CMD(MANAGEMENT_AUTH);
1585 IWL_CMD(MANAGEMENT_DEAUTH);
1586 IWL_CMD(MANAGEMENT_ACTION);
1587 default:
1588 return "UNKNOWN";
1589
1590 }
1591 }
1592
1593 const char *iwl_legacy_get_ctrl_string(int cmd)
1594 {
1595 switch (cmd) {
1596 IWL_CMD(CONTROL_BACK_REQ);
1597 IWL_CMD(CONTROL_BACK);
1598 IWL_CMD(CONTROL_PSPOLL);
1599 IWL_CMD(CONTROL_RTS);
1600 IWL_CMD(CONTROL_CTS);
1601 IWL_CMD(CONTROL_ACK);
1602 IWL_CMD(CONTROL_CFEND);
1603 IWL_CMD(CONTROL_CFENDACK);
1604 default:
1605 return "UNKNOWN";
1606
1607 }
1608 }
1609
1610 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1611 {
1612 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1613 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1614 }
1615
1616 /*
1617 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1618 * iwl_legacy_update_stats function will
1619 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1620 * Use debugFs to display the rx/rx_statistics
1621 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1622 * information will be recorded, but DATA pkt still will be recorded
1623 * for the reason of iwl_led.c need to control the led blinking based on
1624 * number of tx and rx data.
1625 *
1626 */
1627 void
1628 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1629 {
1630 struct traffic_stats *stats;
1631
1632 if (is_tx)
1633 stats = &priv->tx_stats;
1634 else
1635 stats = &priv->rx_stats;
1636
1637 if (ieee80211_is_mgmt(fc)) {
1638 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1639 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1640 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1641 break;
1642 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1643 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1644 break;
1645 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1646 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1647 break;
1648 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1649 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1650 break;
1651 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1652 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1653 break;
1654 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1655 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1656 break;
1657 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1658 stats->mgmt[MANAGEMENT_BEACON]++;
1659 break;
1660 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1661 stats->mgmt[MANAGEMENT_ATIM]++;
1662 break;
1663 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1664 stats->mgmt[MANAGEMENT_DISASSOC]++;
1665 break;
1666 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1667 stats->mgmt[MANAGEMENT_AUTH]++;
1668 break;
1669 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1670 stats->mgmt[MANAGEMENT_DEAUTH]++;
1671 break;
1672 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1673 stats->mgmt[MANAGEMENT_ACTION]++;
1674 break;
1675 }
1676 } else if (ieee80211_is_ctl(fc)) {
1677 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1678 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1679 stats->ctrl[CONTROL_BACK_REQ]++;
1680 break;
1681 case cpu_to_le16(IEEE80211_STYPE_BACK):
1682 stats->ctrl[CONTROL_BACK]++;
1683 break;
1684 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1685 stats->ctrl[CONTROL_PSPOLL]++;
1686 break;
1687 case cpu_to_le16(IEEE80211_STYPE_RTS):
1688 stats->ctrl[CONTROL_RTS]++;
1689 break;
1690 case cpu_to_le16(IEEE80211_STYPE_CTS):
1691 stats->ctrl[CONTROL_CTS]++;
1692 break;
1693 case cpu_to_le16(IEEE80211_STYPE_ACK):
1694 stats->ctrl[CONTROL_ACK]++;
1695 break;
1696 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1697 stats->ctrl[CONTROL_CFEND]++;
1698 break;
1699 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1700 stats->ctrl[CONTROL_CFENDACK]++;
1701 break;
1702 }
1703 } else {
1704 /* data */
1705 stats->data_cnt++;
1706 stats->data_bytes += len;
1707 }
1708 }
1709 EXPORT_SYMBOL(iwl_legacy_update_stats);
1710 #endif
1711
1712 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1713 {
1714 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1715 return;
1716
1717 if (!iwl_legacy_is_any_associated(priv)) {
1718 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1719 return;
1720 }
1721 /*
1722 * There is no easy and better way to force reset the radio,
1723 * the only known method is switching channel which will force to
1724 * reset and tune the radio.
1725 * Use internal short scan (single channel) operation to should
1726 * achieve this objective.
1727 * Driver should reset the radio when number of consecutive missed
1728 * beacon, or any other uCode error condition detected.
1729 */
1730 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1731 iwl_legacy_internal_short_hw_scan(priv);
1732 }
1733
1734
1735 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1736 {
1737 struct iwl_force_reset *force_reset;
1738
1739 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1740 return -EINVAL;
1741
1742 if (mode >= IWL_MAX_FORCE_RESET) {
1743 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1744 return -EINVAL;
1745 }
1746 force_reset = &priv->force_reset[mode];
1747 force_reset->reset_request_count++;
1748 if (!external) {
1749 if (force_reset->last_force_reset_jiffies &&
1750 time_after(force_reset->last_force_reset_jiffies +
1751 force_reset->reset_duration, jiffies)) {
1752 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1753 force_reset->reset_reject_count++;
1754 return -EAGAIN;
1755 }
1756 }
1757 force_reset->reset_success_count++;
1758 force_reset->last_force_reset_jiffies = jiffies;
1759 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1760 switch (mode) {
1761 case IWL_RF_RESET:
1762 _iwl_legacy_force_rf_reset(priv);
1763 break;
1764 case IWL_FW_RESET:
1765 /*
1766 * if the request is from external(ex: debugfs),
1767 * then always perform the request in regardless the module
1768 * parameter setting
1769 * if the request is from internal (uCode error or driver
1770 * detect failure), then fw_restart module parameter
1771 * need to be check before performing firmware reload
1772 */
1773 if (!external && !priv->cfg->mod_params->restart_fw) {
1774 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1775 "module parameter setting\n");
1776 break;
1777 }
1778 IWL_ERR(priv, "On demand firmware reload\n");
1779 /* Set the FW error flag -- cleared on iwl_down */
1780 set_bit(STATUS_FW_ERROR, &priv->status);
1781 wake_up_interruptible(&priv->wait_command_queue);
1782 /*
1783 * Keep the restart process from trying to send host
1784 * commands by clearing the INIT status bit
1785 */
1786 clear_bit(STATUS_READY, &priv->status);
1787 queue_work(priv->workqueue, &priv->restart);
1788 break;
1789 }
1790 return 0;
1791 }
1792
1793 int
1794 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1795 struct ieee80211_vif *vif,
1796 enum nl80211_iftype newtype, bool newp2p)
1797 {
1798 struct iwl_priv *priv = hw->priv;
1799 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1800 struct iwl_rxon_context *tmp;
1801 u32 interface_modes;
1802 int err;
1803
1804 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1805
1806 mutex_lock(&priv->mutex);
1807
1808 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1809
1810 if (!(interface_modes & BIT(newtype))) {
1811 err = -EBUSY;
1812 goto out;
1813 }
1814
1815 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1816 for_each_context(priv, tmp) {
1817 if (ctx == tmp)
1818 continue;
1819
1820 if (!tmp->vif)
1821 continue;
1822
1823 /*
1824 * The current mode switch would be exclusive, but
1825 * another context is active ... refuse the switch.
1826 */
1827 err = -EBUSY;
1828 goto out;
1829 }
1830 }
1831
1832 /* success */
1833 iwl_legacy_teardown_interface(priv, vif, true);
1834 vif->type = newtype;
1835 err = iwl_legacy_setup_interface(priv, ctx);
1836 WARN_ON(err);
1837 /*
1838 * We've switched internally, but submitting to the
1839 * device may have failed for some reason. Mask this
1840 * error, because otherwise mac80211 will not switch
1841 * (and set the interface type back) and we'll be
1842 * out of sync with it.
1843 */
1844 err = 0;
1845
1846 out:
1847 mutex_unlock(&priv->mutex);
1848 return err;
1849 }
1850 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1851
1852 /*
1853 * On every watchdog tick we check (latest) time stamp. If it does not
1854 * change during timeout period and queue is not empty we reset firmware.
1855 */
1856 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1857 {
1858 struct iwl_tx_queue *txq = &priv->txq[cnt];
1859 struct iwl_queue *q = &txq->q;
1860 unsigned long timeout;
1861 int ret;
1862
1863 if (q->read_ptr == q->write_ptr) {
1864 txq->time_stamp = jiffies;
1865 return 0;
1866 }
1867
1868 timeout = txq->time_stamp +
1869 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1870
1871 if (time_after(jiffies, timeout)) {
1872 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1873 q->id, priv->cfg->base_params->wd_timeout);
1874 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1875 return (ret == -EAGAIN) ? 0 : 1;
1876 }
1877
1878 return 0;
1879 }
1880
1881 /*
1882 * Making watchdog tick be a quarter of timeout assure we will
1883 * discover the queue hung between timeout and 1.25*timeout
1884 */
1885 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1886
1887 /*
1888 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1889 * we reset the firmware. If everything is fine just rearm the timer.
1890 */
1891 void iwl_legacy_bg_watchdog(unsigned long data)
1892 {
1893 struct iwl_priv *priv = (struct iwl_priv *)data;
1894 int cnt;
1895 unsigned long timeout;
1896
1897 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1898 return;
1899
1900 timeout = priv->cfg->base_params->wd_timeout;
1901 if (timeout == 0)
1902 return;
1903
1904 /* monitor and check for stuck cmd queue */
1905 if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1906 return;
1907
1908 /* monitor and check for other stuck queues */
1909 if (iwl_legacy_is_any_associated(priv)) {
1910 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1911 /* skip as we already checked the command queue */
1912 if (cnt == priv->cmd_queue)
1913 continue;
1914 if (iwl_legacy_check_stuck_queue(priv, cnt))
1915 return;
1916 }
1917 }
1918
1919 mod_timer(&priv->watchdog, jiffies +
1920 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1921 }
1922 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1923
1924 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1925 {
1926 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1927
1928 if (timeout)
1929 mod_timer(&priv->watchdog,
1930 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1931 else
1932 del_timer(&priv->watchdog);
1933 }
1934 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1935
1936 /*
1937 * extended beacon time format
1938 * time in usec will be changed into a 32-bit value in extended:internal format
1939 * the extended part is the beacon counts
1940 * the internal part is the time in usec within one beacon interval
1941 */
1942 u32
1943 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1944 u32 usec, u32 beacon_interval)
1945 {
1946 u32 quot;
1947 u32 rem;
1948 u32 interval = beacon_interval * TIME_UNIT;
1949
1950 if (!interval || !usec)
1951 return 0;
1952
1953 quot = (usec / interval) &
1954 (iwl_legacy_beacon_time_mask_high(priv,
1955 priv->hw_params.beacon_time_tsf_bits) >>
1956 priv->hw_params.beacon_time_tsf_bits);
1957 rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1958 priv->hw_params.beacon_time_tsf_bits);
1959
1960 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1961 }
1962 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1963
1964 /* base is usually what we get from ucode with each received frame,
1965 * the same as HW timer counter counting down
1966 */
1967 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1968 u32 addon, u32 beacon_interval)
1969 {
1970 u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1971 priv->hw_params.beacon_time_tsf_bits);
1972 u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1973 priv->hw_params.beacon_time_tsf_bits);
1974 u32 interval = beacon_interval * TIME_UNIT;
1975 u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1976 priv->hw_params.beacon_time_tsf_bits)) +
1977 (addon & iwl_legacy_beacon_time_mask_high(priv,
1978 priv->hw_params.beacon_time_tsf_bits));
1979
1980 if (base_low > addon_low)
1981 res += base_low - addon_low;
1982 else if (base_low < addon_low) {
1983 res += interval + base_low - addon_low;
1984 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1985 } else
1986 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1987
1988 return cpu_to_le32(res);
1989 }
1990 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
1991
1992 #ifdef CONFIG_PM
1993
1994 int iwl_legacy_pci_suspend(struct device *device)
1995 {
1996 struct pci_dev *pdev = to_pci_dev(device);
1997 struct iwl_priv *priv = pci_get_drvdata(pdev);
1998
1999 /*
2000 * This function is called when system goes into suspend state
2001 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2002 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2003 * it will not call apm_ops.stop() to stop the DMA operation.
2004 * Calling apm_ops.stop here to make sure we stop the DMA.
2005 */
2006 iwl_legacy_apm_stop(priv);
2007
2008 return 0;
2009 }
2010 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2011
2012 int iwl_legacy_pci_resume(struct device *device)
2013 {
2014 struct pci_dev *pdev = to_pci_dev(device);
2015 struct iwl_priv *priv = pci_get_drvdata(pdev);
2016 bool hw_rfkill = false;
2017
2018 /*
2019 * We disable the RETRY_TIMEOUT register (0x41) to keep
2020 * PCI Tx retries from interfering with C3 CPU state.
2021 */
2022 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2023
2024 iwl_legacy_enable_interrupts(priv);
2025
2026 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2027 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2028 hw_rfkill = true;
2029
2030 if (hw_rfkill)
2031 set_bit(STATUS_RF_KILL_HW, &priv->status);
2032 else
2033 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2034
2035 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2036
2037 return 0;
2038 }
2039 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2040
2041 const struct dev_pm_ops iwl_legacy_pm_ops = {
2042 .suspend = iwl_legacy_pci_suspend,
2043 .resume = iwl_legacy_pci_resume,
2044 .freeze = iwl_legacy_pci_suspend,
2045 .thaw = iwl_legacy_pci_resume,
2046 .poweroff = iwl_legacy_pci_suspend,
2047 .restore = iwl_legacy_pci_resume,
2048 };
2049 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2050
2051 #endif /* CONFIG_PM */
2052
2053 static void
2054 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2055 {
2056 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2057 return;
2058
2059 if (!ctx->is_active)
2060 return;
2061
2062 ctx->qos_data.def_qos_parm.qos_flags = 0;
2063
2064 if (ctx->qos_data.qos_active)
2065 ctx->qos_data.def_qos_parm.qos_flags |=
2066 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2067
2068 if (ctx->ht.enabled)
2069 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2070
2071 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2072 ctx->qos_data.qos_active,
2073 ctx->qos_data.def_qos_parm.qos_flags);
2074
2075 iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2076 sizeof(struct iwl_qosparam_cmd),
2077 &ctx->qos_data.def_qos_parm, NULL);
2078 }
2079
2080 /**
2081 * iwl_legacy_mac_config - mac80211 config callback
2082 */
2083 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2084 {
2085 struct iwl_priv *priv = hw->priv;
2086 const struct iwl_channel_info *ch_info;
2087 struct ieee80211_conf *conf = &hw->conf;
2088 struct ieee80211_channel *channel = conf->channel;
2089 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2090 struct iwl_rxon_context *ctx;
2091 unsigned long flags = 0;
2092 int ret = 0;
2093 u16 ch;
2094 int scan_active = 0;
2095 bool ht_changed[NUM_IWL_RXON_CTX] = {};
2096
2097 if (WARN_ON(!priv->cfg->ops->legacy))
2098 return -EOPNOTSUPP;
2099
2100 mutex_lock(&priv->mutex);
2101
2102 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2103 channel->hw_value, changed);
2104
2105 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2106 test_bit(STATUS_SCANNING, &priv->status))) {
2107 scan_active = 1;
2108 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2109 }
2110
2111 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2112 IEEE80211_CONF_CHANGE_CHANNEL)) {
2113 /* mac80211 uses static for non-HT which is what we want */
2114 priv->current_ht_config.smps = conf->smps_mode;
2115
2116 /*
2117 * Recalculate chain counts.
2118 *
2119 * If monitor mode is enabled then mac80211 will
2120 * set up the SM PS mode to OFF if an HT channel is
2121 * configured.
2122 */
2123 if (priv->cfg->ops->hcmd->set_rxon_chain)
2124 for_each_context(priv, ctx)
2125 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2126 }
2127
2128 /* during scanning mac80211 will delay channel setting until
2129 * scan finish with changed = 0
2130 */
2131 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2132 if (scan_active)
2133 goto set_ch_out;
2134
2135 ch = channel->hw_value;
2136 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2137 if (!iwl_legacy_is_channel_valid(ch_info)) {
2138 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2139 ret = -EINVAL;
2140 goto set_ch_out;
2141 }
2142
2143 spin_lock_irqsave(&priv->lock, flags);
2144
2145 for_each_context(priv, ctx) {
2146 /* Configure HT40 channels */
2147 if (ctx->ht.enabled != conf_is_ht(conf)) {
2148 ctx->ht.enabled = conf_is_ht(conf);
2149 ht_changed[ctx->ctxid] = true;
2150 }
2151 if (ctx->ht.enabled) {
2152 if (conf_is_ht40_minus(conf)) {
2153 ctx->ht.extension_chan_offset =
2154 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2155 ctx->ht.is_40mhz = true;
2156 } else if (conf_is_ht40_plus(conf)) {
2157 ctx->ht.extension_chan_offset =
2158 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2159 ctx->ht.is_40mhz = true;
2160 } else {
2161 ctx->ht.extension_chan_offset =
2162 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2163 ctx->ht.is_40mhz = false;
2164 }
2165 } else
2166 ctx->ht.is_40mhz = false;
2167
2168 /*
2169 * Default to no protection. Protection mode will
2170 * later be set from BSS config in iwl_ht_conf
2171 */
2172 ctx->ht.protection =
2173 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2174
2175 /* if we are switching from ht to 2.4 clear flags
2176 * from any ht related info since 2.4 does not
2177 * support ht */
2178 if ((le16_to_cpu(ctx->staging.channel) != ch))
2179 ctx->staging.flags = 0;
2180
2181 iwl_legacy_set_rxon_channel(priv, channel, ctx);
2182 iwl_legacy_set_rxon_ht(priv, ht_conf);
2183
2184 iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2185 ctx->vif);
2186 }
2187
2188 spin_unlock_irqrestore(&priv->lock, flags);
2189
2190 if (priv->cfg->ops->legacy->update_bcast_stations)
2191 ret =
2192 priv->cfg->ops->legacy->update_bcast_stations(priv);
2193
2194 set_ch_out:
2195 /* The list of supported rates and rate mask can be different
2196 * for each band; since the band may have changed, reset
2197 * the rate mask to what mac80211 lists */
2198 iwl_legacy_set_rate(priv);
2199 }
2200
2201 if (changed & (IEEE80211_CONF_CHANGE_PS |
2202 IEEE80211_CONF_CHANGE_IDLE)) {
2203 ret = iwl_legacy_power_update_mode(priv, false);
2204 if (ret)
2205 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2206 }
2207
2208 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2209 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2210 priv->tx_power_user_lmt, conf->power_level);
2211
2212 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2213 }
2214
2215 if (!iwl_legacy_is_ready(priv)) {
2216 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2217 goto out;
2218 }
2219
2220 if (scan_active)
2221 goto out;
2222
2223 for_each_context(priv, ctx) {
2224 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2225 iwl_legacy_commit_rxon(priv, ctx);
2226 else
2227 IWL_DEBUG_INFO(priv,
2228 "Not re-sending same RXON configuration.\n");
2229 if (ht_changed[ctx->ctxid])
2230 iwl_legacy_update_qos(priv, ctx);
2231 }
2232
2233 out:
2234 IWL_DEBUG_MAC80211(priv, "leave\n");
2235 mutex_unlock(&priv->mutex);
2236 return ret;
2237 }
2238 EXPORT_SYMBOL(iwl_legacy_mac_config);
2239
2240 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2241 {
2242 struct iwl_priv *priv = hw->priv;
2243 unsigned long flags;
2244 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2245 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2246
2247 if (WARN_ON(!priv->cfg->ops->legacy))
2248 return;
2249
2250 mutex_lock(&priv->mutex);
2251 IWL_DEBUG_MAC80211(priv, "enter\n");
2252
2253 spin_lock_irqsave(&priv->lock, flags);
2254 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2255 spin_unlock_irqrestore(&priv->lock, flags);
2256
2257 spin_lock_irqsave(&priv->lock, flags);
2258
2259 /* new association get rid of ibss beacon skb */
2260 if (priv->beacon_skb)
2261 dev_kfree_skb(priv->beacon_skb);
2262
2263 priv->beacon_skb = NULL;
2264
2265 priv->timestamp = 0;
2266
2267 spin_unlock_irqrestore(&priv->lock, flags);
2268
2269 iwl_legacy_scan_cancel_timeout(priv, 100);
2270 if (!iwl_legacy_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 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2280 iwl_legacy_commit_rxon(priv, ctx);
2281
2282 iwl_legacy_set_rate(priv);
2283
2284 mutex_unlock(&priv->mutex);
2285
2286 IWL_DEBUG_MAC80211(priv, "leave\n");
2287 }
2288 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2289
2290 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2291 struct ieee80211_vif *vif)
2292 {
2293 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2294 struct ieee80211_sta *sta;
2295 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2296 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2297
2298 IWL_DEBUG_ASSOC(priv, "enter:\n");
2299
2300 if (!ctx->ht.enabled)
2301 return;
2302
2303 ctx->ht.protection =
2304 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2305 ctx->ht.non_gf_sta_present =
2306 !!(bss_conf->ht_operation_mode &
2307 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2308
2309 ht_conf->single_chain_sufficient = false;
2310
2311 switch (vif->type) {
2312 case NL80211_IFTYPE_STATION:
2313 rcu_read_lock();
2314 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2315 if (sta) {
2316 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2317 int maxstreams;
2318
2319 maxstreams = (ht_cap->mcs.tx_params &
2320 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2321 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2322 maxstreams += 1;
2323
2324 if ((ht_cap->mcs.rx_mask[1] == 0) &&
2325 (ht_cap->mcs.rx_mask[2] == 0))
2326 ht_conf->single_chain_sufficient = true;
2327 if (maxstreams <= 1)
2328 ht_conf->single_chain_sufficient = true;
2329 } else {
2330 /*
2331 * If at all, this can only happen through a race
2332 * when the AP disconnects us while we're still
2333 * setting up the connection, in that case mac80211
2334 * will soon tell us about that.
2335 */
2336 ht_conf->single_chain_sufficient = true;
2337 }
2338 rcu_read_unlock();
2339 break;
2340 case NL80211_IFTYPE_ADHOC:
2341 ht_conf->single_chain_sufficient = true;
2342 break;
2343 default:
2344 break;
2345 }
2346
2347 IWL_DEBUG_ASSOC(priv, "leave\n");
2348 }
2349
2350 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2351 struct ieee80211_vif *vif)
2352 {
2353 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2354
2355 /*
2356 * inform the ucode that there is no longer an
2357 * association and that no more packets should be
2358 * sent
2359 */
2360 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2361 ctx->staging.assoc_id = 0;
2362 iwl_legacy_commit_rxon(priv, ctx);
2363 }
2364
2365 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2366 struct ieee80211_vif *vif)
2367 {
2368 struct iwl_priv *priv = hw->priv;
2369 unsigned long flags;
2370 __le64 timestamp;
2371 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2372
2373 if (!skb)
2374 return;
2375
2376 IWL_DEBUG_MAC80211(priv, "enter\n");
2377
2378 lockdep_assert_held(&priv->mutex);
2379
2380 if (!priv->beacon_ctx) {
2381 IWL_ERR(priv, "update beacon but no beacon context!\n");
2382 dev_kfree_skb(skb);
2383 return;
2384 }
2385
2386 spin_lock_irqsave(&priv->lock, flags);
2387
2388 if (priv->beacon_skb)
2389 dev_kfree_skb(priv->beacon_skb);
2390
2391 priv->beacon_skb = skb;
2392
2393 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2394 priv->timestamp = le64_to_cpu(timestamp);
2395
2396 IWL_DEBUG_MAC80211(priv, "leave\n");
2397 spin_unlock_irqrestore(&priv->lock, flags);
2398
2399 if (!iwl_legacy_is_ready_rf(priv)) {
2400 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2401 return;
2402 }
2403
2404 priv->cfg->ops->legacy->post_associate(priv);
2405 }
2406
2407 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2408 struct ieee80211_vif *vif,
2409 struct ieee80211_bss_conf *bss_conf,
2410 u32 changes)
2411 {
2412 struct iwl_priv *priv = hw->priv;
2413 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2414 int ret;
2415
2416 if (WARN_ON(!priv->cfg->ops->legacy))
2417 return;
2418
2419 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2420
2421 if (!iwl_legacy_is_alive(priv))
2422 return;
2423
2424 mutex_lock(&priv->mutex);
2425
2426 if (changes & BSS_CHANGED_QOS) {
2427 unsigned long flags;
2428
2429 spin_lock_irqsave(&priv->lock, flags);
2430 ctx->qos_data.qos_active = bss_conf->qos;
2431 iwl_legacy_update_qos(priv, ctx);
2432 spin_unlock_irqrestore(&priv->lock, flags);
2433 }
2434
2435 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2436 /*
2437 * the add_interface code must make sure we only ever
2438 * have a single interface that could be beaconing at
2439 * any time.
2440 */
2441 if (vif->bss_conf.enable_beacon)
2442 priv->beacon_ctx = ctx;
2443 else
2444 priv->beacon_ctx = NULL;
2445 }
2446
2447 if (changes & BSS_CHANGED_BSSID) {
2448 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2449
2450 /*
2451 * If there is currently a HW scan going on in the
2452 * background then we need to cancel it else the RXON
2453 * below/in post_associate will fail.
2454 */
2455 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2456 IWL_WARN(priv,
2457 "Aborted scan still in progress after 100ms\n");
2458 IWL_DEBUG_MAC80211(priv,
2459 "leaving - scan abort failed.\n");
2460 mutex_unlock(&priv->mutex);
2461 return;
2462 }
2463
2464 /* mac80211 only sets assoc when in STATION mode */
2465 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2466 memcpy(ctx->staging.bssid_addr,
2467 bss_conf->bssid, ETH_ALEN);
2468
2469 /* currently needed in a few places */
2470 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2471 } else {
2472 ctx->staging.filter_flags &=
2473 ~RXON_FILTER_ASSOC_MSK;
2474 }
2475
2476 }
2477
2478 /*
2479 * This needs to be after setting the BSSID in case
2480 * mac80211 decides to do both changes at once because
2481 * it will invoke post_associate.
2482 */
2483 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2484 iwl_legacy_beacon_update(hw, vif);
2485
2486 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2487 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2488 bss_conf->use_short_preamble);
2489 if (bss_conf->use_short_preamble)
2490 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2491 else
2492 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2493 }
2494
2495 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2496 IWL_DEBUG_MAC80211(priv,
2497 "ERP_CTS %d\n", bss_conf->use_cts_prot);
2498 if (bss_conf->use_cts_prot &&
2499 (priv->band != IEEE80211_BAND_5GHZ))
2500 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2501 else
2502 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2503 if (bss_conf->use_cts_prot)
2504 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2505 else
2506 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2507 }
2508
2509 if (changes & BSS_CHANGED_BASIC_RATES) {
2510 /* XXX use this information
2511 *
2512 * To do that, remove code from iwl_legacy_set_rate() and put something
2513 * like this here:
2514 *
2515 if (A-band)
2516 ctx->staging.ofdm_basic_rates =
2517 bss_conf->basic_rates;
2518 else
2519 ctx->staging.ofdm_basic_rates =
2520 bss_conf->basic_rates >> 4;
2521 ctx->staging.cck_basic_rates =
2522 bss_conf->basic_rates & 0xF;
2523 */
2524 }
2525
2526 if (changes & BSS_CHANGED_HT) {
2527 iwl_legacy_ht_conf(priv, vif);
2528
2529 if (priv->cfg->ops->hcmd->set_rxon_chain)
2530 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2531 }
2532
2533 if (changes & BSS_CHANGED_ASSOC) {
2534 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2535 if (bss_conf->assoc) {
2536 priv->timestamp = bss_conf->timestamp;
2537
2538 if (!iwl_legacy_is_rfkill(priv))
2539 priv->cfg->ops->legacy->post_associate(priv);
2540 } else
2541 iwl_legacy_set_no_assoc(priv, vif);
2542 }
2543
2544 if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2545 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2546 changes);
2547 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2548 if (!ret) {
2549 /* Sync active_rxon with latest change. */
2550 memcpy((void *)&ctx->active,
2551 &ctx->staging,
2552 sizeof(struct iwl_legacy_rxon_cmd));
2553 }
2554 }
2555
2556 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2557 if (vif->bss_conf.enable_beacon) {
2558 memcpy(ctx->staging.bssid_addr,
2559 bss_conf->bssid, ETH_ALEN);
2560 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2561 priv->cfg->ops->legacy->config_ap(priv);
2562 } else
2563 iwl_legacy_set_no_assoc(priv, vif);
2564 }
2565
2566 if (changes & BSS_CHANGED_IBSS) {
2567 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2568 bss_conf->ibss_joined);
2569 if (ret)
2570 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2571 bss_conf->ibss_joined ? "add" : "remove",
2572 bss_conf->bssid);
2573 }
2574
2575 mutex_unlock(&priv->mutex);
2576
2577 IWL_DEBUG_MAC80211(priv, "leave\n");
2578 }
2579 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2580
2581 irqreturn_t iwl_legacy_isr(int irq, void *data)
2582 {
2583 struct iwl_priv *priv = data;
2584 u32 inta, inta_mask;
2585 u32 inta_fh;
2586 unsigned long flags;
2587 if (!priv)
2588 return IRQ_NONE;
2589
2590 spin_lock_irqsave(&priv->lock, flags);
2591
2592 /* Disable (but don't clear!) interrupts here to avoid
2593 * back-to-back ISRs and sporadic interrupts from our NIC.
2594 * If we have something to service, the tasklet will re-enable ints.
2595 * If we *don't* have something, we'll re-enable before leaving here. */
2596 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
2597 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2598
2599 /* Discover which interrupts are active/pending */
2600 inta = iwl_read32(priv, CSR_INT);
2601 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2602
2603 /* Ignore interrupt if there's nothing in NIC to service.
2604 * This may be due to IRQ shared with another device,
2605 * or due to sporadic interrupts thrown from our NIC. */
2606 if (!inta && !inta_fh) {
2607 IWL_DEBUG_ISR(priv,
2608 "Ignore interrupt, inta == 0, inta_fh == 0\n");
2609 goto none;
2610 }
2611
2612 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2613 /* Hardware disappeared. It might have already raised
2614 * an interrupt */
2615 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2616 goto unplugged;
2617 }
2618
2619 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2620 inta, inta_mask, inta_fh);
2621
2622 inta &= ~CSR_INT_BIT_SCD;
2623
2624 /* iwl_irq_tasklet() will service interrupts and re-enable them */
2625 if (likely(inta || inta_fh))
2626 tasklet_schedule(&priv->irq_tasklet);
2627
2628 unplugged:
2629 spin_unlock_irqrestore(&priv->lock, flags);
2630 return IRQ_HANDLED;
2631
2632 none:
2633 /* re-enable interrupts here since we don't have anything to service. */
2634 /* only Re-enable if diabled by irq */
2635 if (test_bit(STATUS_INT_ENABLED, &priv->status))
2636 iwl_legacy_enable_interrupts(priv);
2637 spin_unlock_irqrestore(&priv->lock, flags);
2638 return IRQ_NONE;
2639 }
2640 EXPORT_SYMBOL(iwl_legacy_isr);
2641
2642 /*
2643 * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2644 * function.
2645 */
2646 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2647 struct ieee80211_tx_info *info,
2648 __le16 fc, __le32 *tx_flags)
2649 {
2650 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2651 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2652 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2653 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2654
2655 if (!ieee80211_is_mgmt(fc))
2656 return;
2657
2658 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2659 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2660 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2661 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2662 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2663 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2664 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2665 break;
2666 }
2667 } else if (info->control.rates[0].flags &
2668 IEEE80211_TX_RC_USE_CTS_PROTECT) {
2669 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2670 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2671 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2672 }
2673 }
2674 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);
Linux kernel - Deliverables
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