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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / wireless / iwlegacy / iwl-core.c
blob42df8321dae807ffc616e3d48f19ce4e45323584
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 (priv->switch_rxon.switch_in_progress) {
863 ieee80211_chswitch_done(ctx->vif, is_success);
864 mutex_lock(&priv->mutex);
865 priv->switch_rxon.switch_in_progress = false;
866 mutex_unlock(&priv->mutex);
867 }
868 }
869 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
870
871 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
872 {
873 struct iwl_rx_packet *pkt = rxb_addr(rxb);
874 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
875
876 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
877 struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
878
879 if (priv->switch_rxon.switch_in_progress) {
880 if (!le32_to_cpu(csa->status) &&
881 (csa->channel == priv->switch_rxon.channel)) {
882 rxon->channel = csa->channel;
883 ctx->staging.channel = csa->channel;
884 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
885 le16_to_cpu(csa->channel));
886 iwl_legacy_chswitch_done(priv, true);
887 } else {
888 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
889 le16_to_cpu(csa->channel));
890 iwl_legacy_chswitch_done(priv, false);
891 }
892 }
893 }
894 EXPORT_SYMBOL(iwl_legacy_rx_csa);
895
896 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
897 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
898 struct iwl_rxon_context *ctx)
899 {
900 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
901
902 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
903 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
904 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
905 le16_to_cpu(rxon->channel));
906 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
907 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
908 le32_to_cpu(rxon->filter_flags));
909 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
910 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
911 rxon->ofdm_basic_rates);
912 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
913 rxon->cck_basic_rates);
914 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
915 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
916 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
917 le16_to_cpu(rxon->assoc_id));
918 }
919 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
920 #endif
921 /**
922 * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
923 */
924 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
925 {
926 /* Set the FW error flag -- cleared on iwl_down */
927 set_bit(STATUS_FW_ERROR, &priv->status);
928
929 /* Cancel currently queued command. */
930 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
931
932 IWL_ERR(priv, "Loaded firmware version: %s\n",
933 priv->hw->wiphy->fw_version);
934
935 priv->cfg->ops->lib->dump_nic_error_log(priv);
936 if (priv->cfg->ops->lib->dump_fh)
937 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
938 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
939 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
940 if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
941 iwl_legacy_print_rx_config_cmd(priv,
942 &priv->contexts[IWL_RXON_CTX_BSS]);
943 #endif
944
945 wake_up_interruptible(&priv->wait_command_queue);
946
947 /* Keep the restart process from trying to send host
948 * commands by clearing the INIT status bit */
949 clear_bit(STATUS_READY, &priv->status);
950
951 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
952 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
953 "Restarting adapter due to uCode error.\n");
954
955 if (priv->cfg->mod_params->restart_fw)
956 queue_work(priv->workqueue, &priv->restart);
957 }
958 }
959 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
960
961 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
962 {
963 int ret = 0;
964
965 /* stop device's busmaster DMA activity */
966 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
967
968 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
969 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
970 if (ret)
971 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
972
973 IWL_DEBUG_INFO(priv, "stop master\n");
974
975 return ret;
976 }
977
978 void iwl_legacy_apm_stop(struct iwl_priv *priv)
979 {
980 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
981
982 /* Stop device's DMA activity */
983 iwl_legacy_apm_stop_master(priv);
984
985 /* Reset the entire device */
986 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
987
988 udelay(10);
989
990 /*
991 * Clear "initialization complete" bit to move adapter from
992 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
993 */
994 iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
995 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
996 }
997 EXPORT_SYMBOL(iwl_legacy_apm_stop);
998
999
1000 /*
1001 * Start up NIC's basic functionality after it has been reset
1002 * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
1003 * NOTE: This does not load uCode nor start the embedded processor
1004 */
1005 int iwl_legacy_apm_init(struct iwl_priv *priv)
1006 {
1007 int ret = 0;
1008 u16 lctl;
1009
1010 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1011
1012 /*
1013 * Use "set_bit" below rather than "write", to preserve any hardware
1014 * bits already set by default after reset.
1015 */
1016
1017 /* Disable L0S exit timer (platform NMI Work/Around) */
1018 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1019 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1020
1021 /*
1022 * Disable L0s without affecting L1;
1023 * don't wait for ICH L0s (ICH bug W/A)
1024 */
1025 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1026 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1027
1028 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1029 iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1030 CSR_DBG_HPET_MEM_REG_VAL);
1031
1032 /*
1033 * Enable HAP INTA (interrupt from management bus) to
1034 * wake device's PCI Express link L1a -> L0s
1035 * NOTE: This is no-op for 3945 (non-existent bit)
1036 */
1037 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1038 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1039
1040 /*
1041 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1042 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1043 * If so (likely), disable L0S, so device moves directly L0->L1;
1044 * costs negligible amount of power savings.
1045 * If not (unlikely), enable L0S, so there is at least some
1046 * power savings, even without L1.
1047 */
1048 if (priv->cfg->base_params->set_l0s) {
1049 lctl = iwl_legacy_pcie_link_ctl(priv);
1050 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1051 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1052 /* L1-ASPM enabled; disable(!) L0S */
1053 iwl_legacy_set_bit(priv, CSR_GIO_REG,
1054 CSR_GIO_REG_VAL_L0S_ENABLED);
1055 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1056 } else {
1057 /* L1-ASPM disabled; enable(!) L0S */
1058 iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1059 CSR_GIO_REG_VAL_L0S_ENABLED);
1060 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1061 }
1062 }
1063
1064 /* Configure analog phase-lock-loop before activating to D0A */
1065 if (priv->cfg->base_params->pll_cfg_val)
1066 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1067 priv->cfg->base_params->pll_cfg_val);
1068
1069 /*
1070 * Set "initialization complete" bit to move adapter from
1071 * D0U* --> D0A* (powered-up active) state.
1072 */
1073 iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1074
1075 /*
1076 * Wait for clock stabilization; once stabilized, access to
1077 * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1078 * and accesses to uCode SRAM.
1079 */
1080 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1081 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1082 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1083 if (ret < 0) {
1084 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1085 goto out;
1086 }
1087
1088 /*
1089 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1090 * BSM (Boostrap State Machine) is only in 3945 and 4965.
1091 *
1092 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1093 * do not disable clocks. This preserves any hardware bits already
1094 * set by default in "CLK_CTRL_REG" after reset.
1095 */
1096 if (priv->cfg->base_params->use_bsm)
1097 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1098 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1099 else
1100 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1101 APMG_CLK_VAL_DMA_CLK_RQT);
1102 udelay(20);
1103
1104 /* Disable L1-Active */
1105 iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1106 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1107
1108 out:
1109 return ret;
1110 }
1111 EXPORT_SYMBOL(iwl_legacy_apm_init);
1112
1113
1114 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1115 {
1116 int ret;
1117 s8 prev_tx_power;
1118 bool defer;
1119 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1120
1121 lockdep_assert_held(&priv->mutex);
1122
1123 if (priv->tx_power_user_lmt == tx_power && !force)
1124 return 0;
1125
1126 if (!priv->cfg->ops->lib->send_tx_power)
1127 return -EOPNOTSUPP;
1128
1129 /* 0 dBm mean 1 milliwatt */
1130 if (tx_power < 0) {
1131 IWL_WARN(priv,
1132 "Requested user TXPOWER %d below 1 mW.\n",
1133 tx_power);
1134 return -EINVAL;
1135 }
1136
1137 if (tx_power > priv->tx_power_device_lmt) {
1138 IWL_WARN(priv,
1139 "Requested user TXPOWER %d above upper limit %d.\n",
1140 tx_power, priv->tx_power_device_lmt);
1141 return -EINVAL;
1142 }
1143
1144 if (!iwl_legacy_is_ready_rf(priv))
1145 return -EIO;
1146
1147 /* scan complete and commit_rxon use tx_power_next value,
1148 * it always need to be updated for newest request */
1149 priv->tx_power_next = tx_power;
1150
1151 /* do not set tx power when scanning or channel changing */
1152 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1153 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1154 if (defer && !force) {
1155 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1156 return 0;
1157 }
1158
1159 prev_tx_power = priv->tx_power_user_lmt;
1160 priv->tx_power_user_lmt = tx_power;
1161
1162 ret = priv->cfg->ops->lib->send_tx_power(priv);
1163
1164 /* if fail to set tx_power, restore the orig. tx power */
1165 if (ret) {
1166 priv->tx_power_user_lmt = prev_tx_power;
1167 priv->tx_power_next = prev_tx_power;
1168 }
1169 return ret;
1170 }
1171 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1172
1173 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1174 {
1175 struct iwl_bt_cmd bt_cmd = {
1176 .lead_time = BT_LEAD_TIME_DEF,
1177 .max_kill = BT_MAX_KILL_DEF,
1178 .kill_ack_mask = 0,
1179 .kill_cts_mask = 0,
1180 };
1181
1182 if (!bt_coex_active)
1183 bt_cmd.flags = BT_COEX_DISABLE;
1184 else
1185 bt_cmd.flags = BT_COEX_ENABLE;
1186
1187 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1188 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1189
1190 if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1191 sizeof(struct iwl_bt_cmd), &bt_cmd))
1192 IWL_ERR(priv, "failed to send BT Coex Config\n");
1193 }
1194 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1195
1196 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1197 {
1198 struct iwl_statistics_cmd statistics_cmd = {
1199 .configuration_flags =
1200 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1201 };
1202
1203 if (flags & CMD_ASYNC)
1204 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1205 sizeof(struct iwl_statistics_cmd),
1206 &statistics_cmd, NULL);
1207 else
1208 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1209 sizeof(struct iwl_statistics_cmd),
1210 &statistics_cmd);
1211 }
1212 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1213
1214 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1215 struct iwl_rx_mem_buffer *rxb)
1216 {
1217 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1218 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1219 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1220 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1221 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1222 #endif
1223 }
1224 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1225
1226 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1227 struct iwl_rx_mem_buffer *rxb)
1228 {
1229 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1230 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1231 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1232 "notification for %s:\n", len,
1233 iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1234 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1235 }
1236 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1237
1238 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1239 struct iwl_rx_mem_buffer *rxb)
1240 {
1241 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1242
1243 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1244 "seq 0x%04X ser 0x%08X\n",
1245 le32_to_cpu(pkt->u.err_resp.error_type),
1246 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1247 pkt->u.err_resp.cmd_id,
1248 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1249 le32_to_cpu(pkt->u.err_resp.error_info));
1250 }
1251 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1252
1253 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1254 {
1255 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1256 }
1257
1258 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1259 const struct ieee80211_tx_queue_params *params)
1260 {
1261 struct iwl_priv *priv = hw->priv;
1262 struct iwl_rxon_context *ctx;
1263 unsigned long flags;
1264 int q;
1265
1266 IWL_DEBUG_MAC80211(priv, "enter\n");
1267
1268 if (!iwl_legacy_is_ready_rf(priv)) {
1269 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1270 return -EIO;
1271 }
1272
1273 if (queue >= AC_NUM) {
1274 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1275 return 0;
1276 }
1277
1278 q = AC_NUM - 1 - queue;
1279
1280 spin_lock_irqsave(&priv->lock, flags);
1281
1282 for_each_context(priv, ctx) {
1283 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1284 cpu_to_le16(params->cw_min);
1285 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1286 cpu_to_le16(params->cw_max);
1287 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1288 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1289 cpu_to_le16((params->txop * 32));
1290
1291 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1292 }
1293
1294 spin_unlock_irqrestore(&priv->lock, flags);
1295
1296 IWL_DEBUG_MAC80211(priv, "leave\n");
1297 return 0;
1298 }
1299 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1300
1301 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1302 {
1303 struct iwl_priv *priv = hw->priv;
1304
1305 return priv->ibss_manager == IWL_IBSS_MANAGER;
1306 }
1307 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1308
1309 static int
1310 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1311 {
1312 iwl_legacy_connection_init_rx_config(priv, ctx);
1313
1314 if (priv->cfg->ops->hcmd->set_rxon_chain)
1315 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1316
1317 return iwl_legacy_commit_rxon(priv, ctx);
1318 }
1319
1320 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1321 struct iwl_rxon_context *ctx)
1322 {
1323 struct ieee80211_vif *vif = ctx->vif;
1324 int err;
1325
1326 lockdep_assert_held(&priv->mutex);
1327
1328 /*
1329 * This variable will be correct only when there's just
1330 * a single context, but all code using it is for hardware
1331 * that supports only one context.
1332 */
1333 priv->iw_mode = vif->type;
1334
1335 ctx->is_active = true;
1336
1337 err = iwl_legacy_set_mode(priv, ctx);
1338 if (err) {
1339 if (!ctx->always_active)
1340 ctx->is_active = false;
1341 return err;
1342 }
1343
1344 return 0;
1345 }
1346
1347 int
1348 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1349 {
1350 struct iwl_priv *priv = hw->priv;
1351 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1352 struct iwl_rxon_context *tmp, *ctx = NULL;
1353 int err;
1354
1355 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1356 vif->type, vif->addr);
1357
1358 mutex_lock(&priv->mutex);
1359
1360 if (!iwl_legacy_is_ready_rf(priv)) {
1361 IWL_WARN(priv, "Try to add interface when device not ready\n");
1362 err = -EINVAL;
1363 goto out;
1364 }
1365
1366 for_each_context(priv, tmp) {
1367 u32 possible_modes =
1368 tmp->interface_modes | tmp->exclusive_interface_modes;
1369
1370 if (tmp->vif) {
1371 /* check if this busy context is exclusive */
1372 if (tmp->exclusive_interface_modes &
1373 BIT(tmp->vif->type)) {
1374 err = -EINVAL;
1375 goto out;
1376 }
1377 continue;
1378 }
1379
1380 if (!(possible_modes & BIT(vif->type)))
1381 continue;
1382
1383 /* have maybe usable context w/o interface */
1384 ctx = tmp;
1385 break;
1386 }
1387
1388 if (!ctx) {
1389 err = -EOPNOTSUPP;
1390 goto out;
1391 }
1392
1393 vif_priv->ctx = ctx;
1394 ctx->vif = vif;
1395
1396 err = iwl_legacy_setup_interface(priv, ctx);
1397 if (!err)
1398 goto out;
1399
1400 ctx->vif = NULL;
1401 priv->iw_mode = NL80211_IFTYPE_STATION;
1402 out:
1403 mutex_unlock(&priv->mutex);
1404
1405 IWL_DEBUG_MAC80211(priv, "leave\n");
1406 return err;
1407 }
1408 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1409
1410 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1411 struct ieee80211_vif *vif,
1412 bool mode_change)
1413 {
1414 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1415
1416 lockdep_assert_held(&priv->mutex);
1417
1418 if (priv->scan_vif == vif) {
1419 iwl_legacy_scan_cancel_timeout(priv, 200);
1420 iwl_legacy_force_scan_end(priv);
1421 }
1422
1423 if (!mode_change) {
1424 iwl_legacy_set_mode(priv, ctx);
1425 if (!ctx->always_active)
1426 ctx->is_active = false;
1427 }
1428 }
1429
1430 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1431 struct ieee80211_vif *vif)
1432 {
1433 struct iwl_priv *priv = hw->priv;
1434 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1435
1436 IWL_DEBUG_MAC80211(priv, "enter\n");
1437
1438 mutex_lock(&priv->mutex);
1439
1440 WARN_ON(ctx->vif != vif);
1441 ctx->vif = NULL;
1442
1443 iwl_legacy_teardown_interface(priv, vif, false);
1444
1445 memset(priv->bssid, 0, ETH_ALEN);
1446 mutex_unlock(&priv->mutex);
1447
1448 IWL_DEBUG_MAC80211(priv, "leave\n");
1449
1450 }
1451 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1452
1453 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1454 {
1455 if (!priv->txq)
1456 priv->txq = kzalloc(
1457 sizeof(struct iwl_tx_queue) *
1458 priv->cfg->base_params->num_of_queues,
1459 GFP_KERNEL);
1460 if (!priv->txq) {
1461 IWL_ERR(priv, "Not enough memory for txq\n");
1462 return -ENOMEM;
1463 }
1464 return 0;
1465 }
1466 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1467
1468 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1469 {
1470 kfree(priv->txq);
1471 priv->txq = NULL;
1472 }
1473 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1474
1475 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1476
1477 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1478
1479 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1480 {
1481 priv->tx_traffic_idx = 0;
1482 priv->rx_traffic_idx = 0;
1483 if (priv->tx_traffic)
1484 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1485 if (priv->rx_traffic)
1486 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1487 }
1488
1489 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1490 {
1491 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1492
1493 if (iwlegacy_debug_level & IWL_DL_TX) {
1494 if (!priv->tx_traffic) {
1495 priv->tx_traffic =
1496 kzalloc(traffic_size, GFP_KERNEL);
1497 if (!priv->tx_traffic)
1498 return -ENOMEM;
1499 }
1500 }
1501 if (iwlegacy_debug_level & IWL_DL_RX) {
1502 if (!priv->rx_traffic) {
1503 priv->rx_traffic =
1504 kzalloc(traffic_size, GFP_KERNEL);
1505 if (!priv->rx_traffic)
1506 return -ENOMEM;
1507 }
1508 }
1509 iwl_legacy_reset_traffic_log(priv);
1510 return 0;
1511 }
1512 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1513
1514 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1515 {
1516 kfree(priv->tx_traffic);
1517 priv->tx_traffic = NULL;
1518
1519 kfree(priv->rx_traffic);
1520 priv->rx_traffic = NULL;
1521 }
1522 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1523
1524 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1525 u16 length, struct ieee80211_hdr *header)
1526 {
1527 __le16 fc;
1528 u16 len;
1529
1530 if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1531 return;
1532
1533 if (!priv->tx_traffic)
1534 return;
1535
1536 fc = header->frame_control;
1537 if (ieee80211_is_data(fc)) {
1538 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1539 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1540 memcpy((priv->tx_traffic +
1541 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1542 header, len);
1543 priv->tx_traffic_idx =
1544 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1545 }
1546 }
1547 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1548
1549 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1550 u16 length, struct ieee80211_hdr *header)
1551 {
1552 __le16 fc;
1553 u16 len;
1554
1555 if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1556 return;
1557
1558 if (!priv->rx_traffic)
1559 return;
1560
1561 fc = header->frame_control;
1562 if (ieee80211_is_data(fc)) {
1563 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1564 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1565 memcpy((priv->rx_traffic +
1566 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1567 header, len);
1568 priv->rx_traffic_idx =
1569 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1570 }
1571 }
1572 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1573
1574 const char *iwl_legacy_get_mgmt_string(int cmd)
1575 {
1576 switch (cmd) {
1577 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1578 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1579 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1580 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1581 IWL_CMD(MANAGEMENT_PROBE_REQ);
1582 IWL_CMD(MANAGEMENT_PROBE_RESP);
1583 IWL_CMD(MANAGEMENT_BEACON);
1584 IWL_CMD(MANAGEMENT_ATIM);
1585 IWL_CMD(MANAGEMENT_DISASSOC);
1586 IWL_CMD(MANAGEMENT_AUTH);
1587 IWL_CMD(MANAGEMENT_DEAUTH);
1588 IWL_CMD(MANAGEMENT_ACTION);
1589 default:
1590 return "UNKNOWN";
1591
1592 }
1593 }
1594
1595 const char *iwl_legacy_get_ctrl_string(int cmd)
1596 {
1597 switch (cmd) {
1598 IWL_CMD(CONTROL_BACK_REQ);
1599 IWL_CMD(CONTROL_BACK);
1600 IWL_CMD(CONTROL_PSPOLL);
1601 IWL_CMD(CONTROL_RTS);
1602 IWL_CMD(CONTROL_CTS);
1603 IWL_CMD(CONTROL_ACK);
1604 IWL_CMD(CONTROL_CFEND);
1605 IWL_CMD(CONTROL_CFENDACK);
1606 default:
1607 return "UNKNOWN";
1608
1609 }
1610 }
1611
1612 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1613 {
1614 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1615 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1616 }
1617
1618 /*
1619 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1620 * iwl_legacy_update_stats function will
1621 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1622 * Use debugFs to display the rx/rx_statistics
1623 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1624 * information will be recorded, but DATA pkt still will be recorded
1625 * for the reason of iwl_led.c need to control the led blinking based on
1626 * number of tx and rx data.
1627 *
1628 */
1629 void
1630 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1631 {
1632 struct traffic_stats *stats;
1633
1634 if (is_tx)
1635 stats = &priv->tx_stats;
1636 else
1637 stats = &priv->rx_stats;
1638
1639 if (ieee80211_is_mgmt(fc)) {
1640 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1641 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1642 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1643 break;
1644 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1645 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1646 break;
1647 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1648 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1649 break;
1650 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1651 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1652 break;
1653 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1654 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1655 break;
1656 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1657 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1658 break;
1659 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1660 stats->mgmt[MANAGEMENT_BEACON]++;
1661 break;
1662 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1663 stats->mgmt[MANAGEMENT_ATIM]++;
1664 break;
1665 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1666 stats->mgmt[MANAGEMENT_DISASSOC]++;
1667 break;
1668 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1669 stats->mgmt[MANAGEMENT_AUTH]++;
1670 break;
1671 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1672 stats->mgmt[MANAGEMENT_DEAUTH]++;
1673 break;
1674 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1675 stats->mgmt[MANAGEMENT_ACTION]++;
1676 break;
1677 }
1678 } else if (ieee80211_is_ctl(fc)) {
1679 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1680 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1681 stats->ctrl[CONTROL_BACK_REQ]++;
1682 break;
1683 case cpu_to_le16(IEEE80211_STYPE_BACK):
1684 stats->ctrl[CONTROL_BACK]++;
1685 break;
1686 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1687 stats->ctrl[CONTROL_PSPOLL]++;
1688 break;
1689 case cpu_to_le16(IEEE80211_STYPE_RTS):
1690 stats->ctrl[CONTROL_RTS]++;
1691 break;
1692 case cpu_to_le16(IEEE80211_STYPE_CTS):
1693 stats->ctrl[CONTROL_CTS]++;
1694 break;
1695 case cpu_to_le16(IEEE80211_STYPE_ACK):
1696 stats->ctrl[CONTROL_ACK]++;
1697 break;
1698 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1699 stats->ctrl[CONTROL_CFEND]++;
1700 break;
1701 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1702 stats->ctrl[CONTROL_CFENDACK]++;
1703 break;
1704 }
1705 } else {
1706 /* data */
1707 stats->data_cnt++;
1708 stats->data_bytes += len;
1709 }
1710 }
1711 EXPORT_SYMBOL(iwl_legacy_update_stats);
1712 #endif
1713
1714 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1715 {
1716 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1717 return;
1718
1719 if (!iwl_legacy_is_any_associated(priv)) {
1720 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1721 return;
1722 }
1723 /*
1724 * There is no easy and better way to force reset the radio,
1725 * the only known method is switching channel which will force to
1726 * reset and tune the radio.
1727 * Use internal short scan (single channel) operation to should
1728 * achieve this objective.
1729 * Driver should reset the radio when number of consecutive missed
1730 * beacon, or any other uCode error condition detected.
1731 */
1732 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1733 iwl_legacy_internal_short_hw_scan(priv);
1734 }
1735
1736
1737 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1738 {
1739 struct iwl_force_reset *force_reset;
1740
1741 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1742 return -EINVAL;
1743
1744 if (mode >= IWL_MAX_FORCE_RESET) {
1745 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1746 return -EINVAL;
1747 }
1748 force_reset = &priv->force_reset[mode];
1749 force_reset->reset_request_count++;
1750 if (!external) {
1751 if (force_reset->last_force_reset_jiffies &&
1752 time_after(force_reset->last_force_reset_jiffies +
1753 force_reset->reset_duration, jiffies)) {
1754 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1755 force_reset->reset_reject_count++;
1756 return -EAGAIN;
1757 }
1758 }
1759 force_reset->reset_success_count++;
1760 force_reset->last_force_reset_jiffies = jiffies;
1761 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1762 switch (mode) {
1763 case IWL_RF_RESET:
1764 _iwl_legacy_force_rf_reset(priv);
1765 break;
1766 case IWL_FW_RESET:
1767 /*
1768 * if the request is from external(ex: debugfs),
1769 * then always perform the request in regardless the module
1770 * parameter setting
1771 * if the request is from internal (uCode error or driver
1772 * detect failure), then fw_restart module parameter
1773 * need to be check before performing firmware reload
1774 */
1775 if (!external && !priv->cfg->mod_params->restart_fw) {
1776 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1777 "module parameter setting\n");
1778 break;
1779 }
1780 IWL_ERR(priv, "On demand firmware reload\n");
1781 /* Set the FW error flag -- cleared on iwl_down */
1782 set_bit(STATUS_FW_ERROR, &priv->status);
1783 wake_up_interruptible(&priv->wait_command_queue);
1784 /*
1785 * Keep the restart process from trying to send host
1786 * commands by clearing the INIT status bit
1787 */
1788 clear_bit(STATUS_READY, &priv->status);
1789 queue_work(priv->workqueue, &priv->restart);
1790 break;
1791 }
1792 return 0;
1793 }
1794
1795 int
1796 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1797 struct ieee80211_vif *vif,
1798 enum nl80211_iftype newtype, bool newp2p)
1799 {
1800 struct iwl_priv *priv = hw->priv;
1801 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1802 struct iwl_rxon_context *tmp;
1803 u32 interface_modes;
1804 int err;
1805
1806 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1807
1808 mutex_lock(&priv->mutex);
1809
1810 if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1811 /*
1812 * Huh? But wait ... this can maybe happen when
1813 * we're in the middle of a firmware restart!
1814 */
1815 err = -EBUSY;
1816 goto out;
1817 }
1818
1819 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1820
1821 if (!(interface_modes & BIT(newtype))) {
1822 err = -EBUSY;
1823 goto out;
1824 }
1825
1826 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1827 for_each_context(priv, tmp) {
1828 if (ctx == tmp)
1829 continue;
1830
1831 if (!tmp->vif)
1832 continue;
1833
1834 /*
1835 * The current mode switch would be exclusive, but
1836 * another context is active ... refuse the switch.
1837 */
1838 err = -EBUSY;
1839 goto out;
1840 }
1841 }
1842
1843 /* success */
1844 iwl_legacy_teardown_interface(priv, vif, true);
1845 vif->type = newtype;
1846 vif->p2p = newp2p;
1847 err = iwl_legacy_setup_interface(priv, ctx);
1848 WARN_ON(err);
1849 /*
1850 * We've switched internally, but submitting to the
1851 * device may have failed for some reason. Mask this
1852 * error, because otherwise mac80211 will not switch
1853 * (and set the interface type back) and we'll be
1854 * out of sync with it.
1855 */
1856 err = 0;
1857
1858 out:
1859 mutex_unlock(&priv->mutex);
1860 return err;
1861 }
1862 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1863
1864 /*
1865 * On every watchdog tick we check (latest) time stamp. If it does not
1866 * change during timeout period and queue is not empty we reset firmware.
1867 */
1868 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1869 {
1870 struct iwl_tx_queue *txq = &priv->txq[cnt];
1871 struct iwl_queue *q = &txq->q;
1872 unsigned long timeout;
1873 int ret;
1874
1875 if (q->read_ptr == q->write_ptr) {
1876 txq->time_stamp = jiffies;
1877 return 0;
1878 }
1879
1880 timeout = txq->time_stamp +
1881 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1882
1883 if (time_after(jiffies, timeout)) {
1884 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1885 q->id, priv->cfg->base_params->wd_timeout);
1886 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1887 return (ret == -EAGAIN) ? 0 : 1;
1888 }
1889
1890 return 0;
1891 }
1892
1893 /*
1894 * Making watchdog tick be a quarter of timeout assure we will
1895 * discover the queue hung between timeout and 1.25*timeout
1896 */
1897 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1898
1899 /*
1900 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1901 * we reset the firmware. If everything is fine just rearm the timer.
1902 */
1903 void iwl_legacy_bg_watchdog(unsigned long data)
1904 {
1905 struct iwl_priv *priv = (struct iwl_priv *)data;
1906 int cnt;
1907 unsigned long timeout;
1908
1909 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1910 return;
1911
1912 timeout = priv->cfg->base_params->wd_timeout;
1913 if (timeout == 0)
1914 return;
1915
1916 /* monitor and check for stuck cmd queue */
1917 if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1918 return;
1919
1920 /* monitor and check for other stuck queues */
1921 if (iwl_legacy_is_any_associated(priv)) {
1922 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1923 /* skip as we already checked the command queue */
1924 if (cnt == priv->cmd_queue)
1925 continue;
1926 if (iwl_legacy_check_stuck_queue(priv, cnt))
1927 return;
1928 }
1929 }
1930
1931 mod_timer(&priv->watchdog, jiffies +
1932 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1933 }
1934 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1935
1936 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1937 {
1938 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1939
1940 if (timeout)
1941 mod_timer(&priv->watchdog,
1942 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1943 else
1944 del_timer(&priv->watchdog);
1945 }
1946 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1947
1948 /*
1949 * extended beacon time format
1950 * time in usec will be changed into a 32-bit value in extended:internal format
1951 * the extended part is the beacon counts
1952 * the internal part is the time in usec within one beacon interval
1953 */
1954 u32
1955 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1956 u32 usec, u32 beacon_interval)
1957 {
1958 u32 quot;
1959 u32 rem;
1960 u32 interval = beacon_interval * TIME_UNIT;
1961
1962 if (!interval || !usec)
1963 return 0;
1964
1965 quot = (usec / interval) &
1966 (iwl_legacy_beacon_time_mask_high(priv,
1967 priv->hw_params.beacon_time_tsf_bits) >>
1968 priv->hw_params.beacon_time_tsf_bits);
1969 rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1970 priv->hw_params.beacon_time_tsf_bits);
1971
1972 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1973 }
1974 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1975
1976 /* base is usually what we get from ucode with each received frame,
1977 * the same as HW timer counter counting down
1978 */
1979 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1980 u32 addon, u32 beacon_interval)
1981 {
1982 u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1983 priv->hw_params.beacon_time_tsf_bits);
1984 u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1985 priv->hw_params.beacon_time_tsf_bits);
1986 u32 interval = beacon_interval * TIME_UNIT;
1987 u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1988 priv->hw_params.beacon_time_tsf_bits)) +
1989 (addon & iwl_legacy_beacon_time_mask_high(priv,
1990 priv->hw_params.beacon_time_tsf_bits));
1991
1992 if (base_low > addon_low)
1993 res += base_low - addon_low;
1994 else if (base_low < addon_low) {
1995 res += interval + base_low - addon_low;
1996 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1997 } else
1998 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1999
2000 return cpu_to_le32(res);
2001 }
2002 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
2003
2004 #ifdef CONFIG_PM
2005
2006 int iwl_legacy_pci_suspend(struct device *device)
2007 {
2008 struct pci_dev *pdev = to_pci_dev(device);
2009 struct iwl_priv *priv = pci_get_drvdata(pdev);
2010
2011 /*
2012 * This function is called when system goes into suspend state
2013 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2014 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2015 * it will not call apm_ops.stop() to stop the DMA operation.
2016 * Calling apm_ops.stop here to make sure we stop the DMA.
2017 */
2018 iwl_legacy_apm_stop(priv);
2019
2020 return 0;
2021 }
2022 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2023
2024 int iwl_legacy_pci_resume(struct device *device)
2025 {
2026 struct pci_dev *pdev = to_pci_dev(device);
2027 struct iwl_priv *priv = pci_get_drvdata(pdev);
2028 bool hw_rfkill = false;
2029
2030 /*
2031 * We disable the RETRY_TIMEOUT register (0x41) to keep
2032 * PCI Tx retries from interfering with C3 CPU state.
2033 */
2034 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2035
2036 iwl_legacy_enable_interrupts(priv);
2037
2038 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2039 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2040 hw_rfkill = true;
2041
2042 if (hw_rfkill)
2043 set_bit(STATUS_RF_KILL_HW, &priv->status);
2044 else
2045 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2046
2047 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2048
2049 return 0;
2050 }
2051 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2052
2053 const struct dev_pm_ops iwl_legacy_pm_ops = {
2054 .suspend = iwl_legacy_pci_suspend,
2055 .resume = iwl_legacy_pci_resume,
2056 .freeze = iwl_legacy_pci_suspend,
2057 .thaw = iwl_legacy_pci_resume,
2058 .poweroff = iwl_legacy_pci_suspend,
2059 .restore = iwl_legacy_pci_resume,
2060 };
2061 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2062
2063 #endif /* CONFIG_PM */
2064
2065 static void
2066 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2067 {
2068 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2069 return;
2070
2071 if (!ctx->is_active)
2072 return;
2073
2074 ctx->qos_data.def_qos_parm.qos_flags = 0;
2075
2076 if (ctx->qos_data.qos_active)
2077 ctx->qos_data.def_qos_parm.qos_flags |=
2078 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2079
2080 if (ctx->ht.enabled)
2081 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2082
2083 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2084 ctx->qos_data.qos_active,
2085 ctx->qos_data.def_qos_parm.qos_flags);
2086
2087 iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2088 sizeof(struct iwl_qosparam_cmd),
2089 &ctx->qos_data.def_qos_parm, NULL);
2090 }
2091
2092 /**
2093 * iwl_legacy_mac_config - mac80211 config callback
2094 */
2095 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2096 {
2097 struct iwl_priv *priv = hw->priv;
2098 const struct iwl_channel_info *ch_info;
2099 struct ieee80211_conf *conf = &hw->conf;
2100 struct ieee80211_channel *channel = conf->channel;
2101 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2102 struct iwl_rxon_context *ctx;
2103 unsigned long flags = 0;
2104 int ret = 0;
2105 u16 ch;
2106 int scan_active = 0;
2107 bool ht_changed[NUM_IWL_RXON_CTX] = {};
2108
2109 if (WARN_ON(!priv->cfg->ops->legacy))
2110 return -EOPNOTSUPP;
2111
2112 mutex_lock(&priv->mutex);
2113
2114 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2115 channel->hw_value, changed);
2116
2117 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2118 scan_active = 1;
2119 IWL_DEBUG_MAC80211(priv, "scan active\n");
2120 }
2121
2122 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2123 IEEE80211_CONF_CHANGE_CHANNEL)) {
2124 /* mac80211 uses static for non-HT which is what we want */
2125 priv->current_ht_config.smps = conf->smps_mode;
2126
2127 /*
2128 * Recalculate chain counts.
2129 *
2130 * If monitor mode is enabled then mac80211 will
2131 * set up the SM PS mode to OFF if an HT channel is
2132 * configured.
2133 */
2134 if (priv->cfg->ops->hcmd->set_rxon_chain)
2135 for_each_context(priv, ctx)
2136 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2137 }
2138
2139 /* during scanning mac80211 will delay channel setting until
2140 * scan finish with changed = 0
2141 */
2142 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2143 if (scan_active)
2144 goto set_ch_out;
2145
2146 ch = channel->hw_value;
2147 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2148 if (!iwl_legacy_is_channel_valid(ch_info)) {
2149 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2150 ret = -EINVAL;
2151 goto set_ch_out;
2152 }
2153
2154 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2155 !iwl_legacy_is_channel_ibss(ch_info)) {
2156 IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2157 ret = -EINVAL;
2158 goto set_ch_out;
2159 }
2160
2161 spin_lock_irqsave(&priv->lock, flags);
2162
2163 for_each_context(priv, ctx) {
2164 /* Configure HT40 channels */
2165 if (ctx->ht.enabled != conf_is_ht(conf)) {
2166 ctx->ht.enabled = conf_is_ht(conf);
2167 ht_changed[ctx->ctxid] = true;
2168 }
2169 if (ctx->ht.enabled) {
2170 if (conf_is_ht40_minus(conf)) {
2171 ctx->ht.extension_chan_offset =
2172 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2173 ctx->ht.is_40mhz = true;
2174 } else if (conf_is_ht40_plus(conf)) {
2175 ctx->ht.extension_chan_offset =
2176 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2177 ctx->ht.is_40mhz = true;
2178 } else {
2179 ctx->ht.extension_chan_offset =
2180 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2181 ctx->ht.is_40mhz = false;
2182 }
2183 } else
2184 ctx->ht.is_40mhz = false;
2185
2186 /*
2187 * Default to no protection. Protection mode will
2188 * later be set from BSS config in iwl_ht_conf
2189 */
2190 ctx->ht.protection =
2191 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2192
2193 /* if we are switching from ht to 2.4 clear flags
2194 * from any ht related info since 2.4 does not
2195 * support ht */
2196 if ((le16_to_cpu(ctx->staging.channel) != ch))
2197 ctx->staging.flags = 0;
2198
2199 iwl_legacy_set_rxon_channel(priv, channel, ctx);
2200 iwl_legacy_set_rxon_ht(priv, ht_conf);
2201
2202 iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2203 ctx->vif);
2204 }
2205
2206 spin_unlock_irqrestore(&priv->lock, flags);
2207
2208 if (priv->cfg->ops->legacy->update_bcast_stations)
2209 ret =
2210 priv->cfg->ops->legacy->update_bcast_stations(priv);
2211
2212 set_ch_out:
2213 /* The list of supported rates and rate mask can be different
2214 * for each band; since the band may have changed, reset
2215 * the rate mask to what mac80211 lists */
2216 iwl_legacy_set_rate(priv);
2217 }
2218
2219 if (changed & (IEEE80211_CONF_CHANGE_PS |
2220 IEEE80211_CONF_CHANGE_IDLE)) {
2221 ret = iwl_legacy_power_update_mode(priv, false);
2222 if (ret)
2223 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2224 }
2225
2226 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2227 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2228 priv->tx_power_user_lmt, conf->power_level);
2229
2230 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2231 }
2232
2233 if (!iwl_legacy_is_ready(priv)) {
2234 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2235 goto out;
2236 }
2237
2238 if (scan_active)
2239 goto out;
2240
2241 for_each_context(priv, ctx) {
2242 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2243 iwl_legacy_commit_rxon(priv, ctx);
2244 else
2245 IWL_DEBUG_INFO(priv,
2246 "Not re-sending same RXON configuration.\n");
2247 if (ht_changed[ctx->ctxid])
2248 iwl_legacy_update_qos(priv, ctx);
2249 }
2250
2251 out:
2252 IWL_DEBUG_MAC80211(priv, "leave\n");
2253 mutex_unlock(&priv->mutex);
2254 return ret;
2255 }
2256 EXPORT_SYMBOL(iwl_legacy_mac_config);
2257
2258 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2259 {
2260 struct iwl_priv *priv = hw->priv;
2261 unsigned long flags;
2262 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2263 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2264
2265 if (WARN_ON(!priv->cfg->ops->legacy))
2266 return;
2267
2268 mutex_lock(&priv->mutex);
2269 IWL_DEBUG_MAC80211(priv, "enter\n");
2270
2271 spin_lock_irqsave(&priv->lock, flags);
2272 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2273 spin_unlock_irqrestore(&priv->lock, flags);
2274
2275 spin_lock_irqsave(&priv->lock, flags);
2276
2277 /* new association get rid of ibss beacon skb */
2278 if (priv->beacon_skb)
2279 dev_kfree_skb(priv->beacon_skb);
2280
2281 priv->beacon_skb = NULL;
2282
2283 priv->timestamp = 0;
2284
2285 spin_unlock_irqrestore(&priv->lock, flags);
2286
2287 iwl_legacy_scan_cancel_timeout(priv, 100);
2288 if (!iwl_legacy_is_ready_rf(priv)) {
2289 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2290 mutex_unlock(&priv->mutex);
2291 return;
2292 }
2293
2294 /* we are restarting association process
2295 * clear RXON_FILTER_ASSOC_MSK bit
2296 */
2297 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2298 iwl_legacy_commit_rxon(priv, ctx);
2299
2300 iwl_legacy_set_rate(priv);
2301
2302 mutex_unlock(&priv->mutex);
2303
2304 IWL_DEBUG_MAC80211(priv, "leave\n");
2305 }
2306 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2307
2308 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2309 struct ieee80211_vif *vif)
2310 {
2311 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2312 struct ieee80211_sta *sta;
2313 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2314 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2315
2316 IWL_DEBUG_ASSOC(priv, "enter:\n");
2317
2318 if (!ctx->ht.enabled)
2319 return;
2320
2321 ctx->ht.protection =
2322 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2323 ctx->ht.non_gf_sta_present =
2324 !!(bss_conf->ht_operation_mode &
2325 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2326
2327 ht_conf->single_chain_sufficient = false;
2328
2329 switch (vif->type) {
2330 case NL80211_IFTYPE_STATION:
2331 rcu_read_lock();
2332 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2333 if (sta) {
2334 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2335 int maxstreams;
2336
2337 maxstreams = (ht_cap->mcs.tx_params &
2338 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2339 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2340 maxstreams += 1;
2341
2342 if ((ht_cap->mcs.rx_mask[1] == 0) &&
2343 (ht_cap->mcs.rx_mask[2] == 0))
2344 ht_conf->single_chain_sufficient = true;
2345 if (maxstreams <= 1)
2346 ht_conf->single_chain_sufficient = true;
2347 } else {
2348 /*
2349 * If at all, this can only happen through a race
2350 * when the AP disconnects us while we're still
2351 * setting up the connection, in that case mac80211
2352 * will soon tell us about that.
2353 */
2354 ht_conf->single_chain_sufficient = true;
2355 }
2356 rcu_read_unlock();
2357 break;
2358 case NL80211_IFTYPE_ADHOC:
2359 ht_conf->single_chain_sufficient = true;
2360 break;
2361 default:
2362 break;
2363 }
2364
2365 IWL_DEBUG_ASSOC(priv, "leave\n");
2366 }
2367
2368 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2369 struct ieee80211_vif *vif)
2370 {
2371 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2372
2373 /*
2374 * inform the ucode that there is no longer an
2375 * association and that no more packets should be
2376 * sent
2377 */
2378 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2379 ctx->staging.assoc_id = 0;
2380 iwl_legacy_commit_rxon(priv, ctx);
2381 }
2382
2383 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2384 struct ieee80211_vif *vif)
2385 {
2386 struct iwl_priv *priv = hw->priv;
2387 unsigned long flags;
2388 __le64 timestamp;
2389 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2390
2391 if (!skb)
2392 return;
2393
2394 IWL_DEBUG_MAC80211(priv, "enter\n");
2395
2396 lockdep_assert_held(&priv->mutex);
2397
2398 if (!priv->beacon_ctx) {
2399 IWL_ERR(priv, "update beacon but no beacon context!\n");
2400 dev_kfree_skb(skb);
2401 return;
2402 }
2403
2404 spin_lock_irqsave(&priv->lock, flags);
2405
2406 if (priv->beacon_skb)
2407 dev_kfree_skb(priv->beacon_skb);
2408
2409 priv->beacon_skb = skb;
2410
2411 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2412 priv->timestamp = le64_to_cpu(timestamp);
2413
2414 IWL_DEBUG_MAC80211(priv, "leave\n");
2415 spin_unlock_irqrestore(&priv->lock, flags);
2416
2417 if (!iwl_legacy_is_ready_rf(priv)) {
2418 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2419 return;
2420 }
2421
2422 priv->cfg->ops->legacy->post_associate(priv);
2423 }
2424
2425 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2426 struct ieee80211_vif *vif,
2427 struct ieee80211_bss_conf *bss_conf,
2428 u32 changes)
2429 {
2430 struct iwl_priv *priv = hw->priv;
2431 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2432 int ret;
2433
2434 if (WARN_ON(!priv->cfg->ops->legacy))
2435 return;
2436
2437 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2438
2439 mutex_lock(&priv->mutex);
2440
2441 if (!iwl_legacy_is_alive(priv)) {
2442 mutex_unlock(&priv->mutex);
2443 return;
2444 }
2445
2446 if (changes & BSS_CHANGED_QOS) {
2447 unsigned long flags;
2448
2449 spin_lock_irqsave(&priv->lock, flags);
2450 ctx->qos_data.qos_active = bss_conf->qos;
2451 iwl_legacy_update_qos(priv, ctx);
2452 spin_unlock_irqrestore(&priv->lock, flags);
2453 }
2454
2455 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2456 /*
2457 * the add_interface code must make sure we only ever
2458 * have a single interface that could be beaconing at
2459 * any time.
2460 */
2461 if (vif->bss_conf.enable_beacon)
2462 priv->beacon_ctx = ctx;
2463 else
2464 priv->beacon_ctx = NULL;
2465 }
2466
2467 if (changes & BSS_CHANGED_BSSID) {
2468 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2469
2470 /*
2471 * If there is currently a HW scan going on in the
2472 * background then we need to cancel it else the RXON
2473 * below/in post_associate will fail.
2474 */
2475 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2476 IWL_WARN(priv,
2477 "Aborted scan still in progress after 100ms\n");
2478 IWL_DEBUG_MAC80211(priv,
2479 "leaving - scan abort failed.\n");
2480 mutex_unlock(&priv->mutex);
2481 return;
2482 }
2483
2484 /* mac80211 only sets assoc when in STATION mode */
2485 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2486 memcpy(ctx->staging.bssid_addr,
2487 bss_conf->bssid, ETH_ALEN);
2488
2489 /* currently needed in a few places */
2490 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2491 } else {
2492 ctx->staging.filter_flags &=
2493 ~RXON_FILTER_ASSOC_MSK;
2494 }
2495
2496 }
2497
2498 /*
2499 * This needs to be after setting the BSSID in case
2500 * mac80211 decides to do both changes at once because
2501 * it will invoke post_associate.
2502 */
2503 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2504 iwl_legacy_beacon_update(hw, vif);
2505
2506 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2507 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2508 bss_conf->use_short_preamble);
2509 if (bss_conf->use_short_preamble)
2510 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2511 else
2512 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2513 }
2514
2515 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2516 IWL_DEBUG_MAC80211(priv,
2517 "ERP_CTS %d\n", bss_conf->use_cts_prot);
2518 if (bss_conf->use_cts_prot &&
2519 (priv->band != IEEE80211_BAND_5GHZ))
2520 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2521 else
2522 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2523 if (bss_conf->use_cts_prot)
2524 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2525 else
2526 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2527 }
2528
2529 if (changes & BSS_CHANGED_BASIC_RATES) {
2530 /* XXX use this information
2531 *
2532 * To do that, remove code from iwl_legacy_set_rate() and put something
2533 * like this here:
2534 *
2535 if (A-band)
2536 ctx->staging.ofdm_basic_rates =
2537 bss_conf->basic_rates;
2538 else
2539 ctx->staging.ofdm_basic_rates =
2540 bss_conf->basic_rates >> 4;
2541 ctx->staging.cck_basic_rates =
2542 bss_conf->basic_rates & 0xF;
2543 */
2544 }
2545
2546 if (changes & BSS_CHANGED_HT) {
2547 iwl_legacy_ht_conf(priv, vif);
2548
2549 if (priv->cfg->ops->hcmd->set_rxon_chain)
2550 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2551 }
2552
2553 if (changes & BSS_CHANGED_ASSOC) {
2554 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2555 if (bss_conf->assoc) {
2556 priv->timestamp = bss_conf->timestamp;
2557
2558 if (!iwl_legacy_is_rfkill(priv))
2559 priv->cfg->ops->legacy->post_associate(priv);
2560 } else
2561 iwl_legacy_set_no_assoc(priv, vif);
2562 }
2563
2564 if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2565 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2566 changes);
2567 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2568 if (!ret) {
2569 /* Sync active_rxon with latest change. */
2570 memcpy((void *)&ctx->active,
2571 &ctx->staging,
2572 sizeof(struct iwl_legacy_rxon_cmd));
2573 }
2574 }
2575
2576 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2577 if (vif->bss_conf.enable_beacon) {
2578 memcpy(ctx->staging.bssid_addr,
2579 bss_conf->bssid, ETH_ALEN);
2580 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2581 priv->cfg->ops->legacy->config_ap(priv);
2582 } else
2583 iwl_legacy_set_no_assoc(priv, vif);
2584 }
2585
2586 if (changes & BSS_CHANGED_IBSS) {
2587 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2588 bss_conf->ibss_joined);
2589 if (ret)
2590 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2591 bss_conf->ibss_joined ? "add" : "remove",
2592 bss_conf->bssid);
2593 }
2594
2595 mutex_unlock(&priv->mutex);
2596
2597 IWL_DEBUG_MAC80211(priv, "leave\n");
2598 }
2599 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2600
2601 irqreturn_t iwl_legacy_isr(int irq, void *data)
2602 {
2603 struct iwl_priv *priv = data;
2604 u32 inta, inta_mask;
2605 u32 inta_fh;
2606 unsigned long flags;
2607 if (!priv)
2608 return IRQ_NONE;
2609
2610 spin_lock_irqsave(&priv->lock, flags);
2611
2612 /* Disable (but don't clear!) interrupts here to avoid
2613 * back-to-back ISRs and sporadic interrupts from our NIC.
2614 * If we have something to service, the tasklet will re-enable ints.
2615 * If we *don't* have something, we'll re-enable before leaving here. */
2616 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
2617 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2618
2619 /* Discover which interrupts are active/pending */
2620 inta = iwl_read32(priv, CSR_INT);
2621 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2622
2623 /* Ignore interrupt if there's nothing in NIC to service.
2624 * This may be due to IRQ shared with another device,
2625 * or due to sporadic interrupts thrown from our NIC. */
2626 if (!inta && !inta_fh) {
2627 IWL_DEBUG_ISR(priv,
2628 "Ignore interrupt, inta == 0, inta_fh == 0\n");
2629 goto none;
2630 }
2631
2632 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2633 /* Hardware disappeared. It might have already raised
2634 * an interrupt */
2635 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2636 goto unplugged;
2637 }
2638
2639 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2640 inta, inta_mask, inta_fh);
2641
2642 inta &= ~CSR_INT_BIT_SCD;
2643
2644 /* iwl_irq_tasklet() will service interrupts and re-enable them */
2645 if (likely(inta || inta_fh))
2646 tasklet_schedule(&priv->irq_tasklet);
2647
2648 unplugged:
2649 spin_unlock_irqrestore(&priv->lock, flags);
2650 return IRQ_HANDLED;
2651
2652 none:
2653 /* re-enable interrupts here since we don't have anything to service. */
2654 /* only Re-enable if disabled by irq */
2655 if (test_bit(STATUS_INT_ENABLED, &priv->status))
2656 iwl_legacy_enable_interrupts(priv);
2657 spin_unlock_irqrestore(&priv->lock, flags);
2658 return IRQ_NONE;
2659 }
2660 EXPORT_SYMBOL(iwl_legacy_isr);
2661
2662 /*
2663 * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2664 * function.
2665 */
2666 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2667 struct ieee80211_tx_info *info,
2668 __le16 fc, __le32 *tx_flags)
2669 {
2670 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2671 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2672 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2673 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2674
2675 if (!ieee80211_is_mgmt(fc))
2676 return;
2677
2678 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2679 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2680 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2681 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2682 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2683 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2684 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2685 break;
2686 }
2687 } else if (info->control.rates[0].flags &
2688 IEEE80211_TX_RC_USE_CTS_PROTECT) {
2689 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2690 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2691 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2692 }
2693 }
2694 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);