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cris: add arch/cris/include/asm/serial.h
[linux-2.6/next.git] / drivers / net / wireless / iwlegacy / iwl-core.c
blob35cd2537e7fd2cf13bdf8ff185498b108beaee7f
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h"
38 #include "iwl-debug.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41 #include "iwl-power.h"
42 #include "iwl-sta.h"
43 #include "iwl-helpers.h"
44
45
46 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
50
51 /*
52 * set bt_coex_active to true, uCode will do kill/defer
53 * every time the priority line is asserted (BT is sending signals on the
54 * priority line in the PCIx).
55 * set bt_coex_active to false, uCode will ignore the BT activity and
56 * perform the normal operation
57 *
58 * User might experience transmit issue on some platform due to WiFi/BT
59 * co-exist problem. The possible behaviors are:
60 * Able to scan and finding all the available AP
61 * Not able to associate with any AP
62 * On those platforms, WiFi communication can be restored by set
63 * "bt_coex_active" module parameter to "false"
64 *
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
66 */
67 static bool bt_coex_active = true;
68 module_param(bt_coex_active, bool, S_IRUGO);
69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
70
71 u32 iwlegacy_debug_level;
72 EXPORT_SYMBOL(iwlegacy_debug_level);
73
74 const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
75 EXPORT_SYMBOL(iwlegacy_bcast_addr);
76
77
78 /* This function both allocates and initializes hw and priv. */
79 struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
80 {
81 struct iwl_priv *priv;
82 /* mac80211 allocates memory for this device instance, including
83 * space for this driver's private structure */
84 struct ieee80211_hw *hw;
85
86 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
87 cfg->ops->ieee80211_ops);
88 if (hw == NULL) {
89 pr_err("%s: Can not allocate network device\n",
90 cfg->name);
91 goto out;
92 }
93
94 priv = hw->priv;
95 priv->hw = hw;
96
97 out:
98 return hw;
99 }
100 EXPORT_SYMBOL(iwl_legacy_alloc_all);
101
102 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
103 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
104 static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
105 struct ieee80211_sta_ht_cap *ht_info,
106 enum ieee80211_band band)
107 {
108 u16 max_bit_rate = 0;
109 u8 rx_chains_num = priv->hw_params.rx_chains_num;
110 u8 tx_chains_num = priv->hw_params.tx_chains_num;
111
112 ht_info->cap = 0;
113 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
114
115 ht_info->ht_supported = true;
116
117 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
118 max_bit_rate = MAX_BIT_RATE_20_MHZ;
119 if (priv->hw_params.ht40_channel & BIT(band)) {
120 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
121 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
122 ht_info->mcs.rx_mask[4] = 0x01;
123 max_bit_rate = MAX_BIT_RATE_40_MHZ;
124 }
125
126 if (priv->cfg->mod_params->amsdu_size_8K)
127 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
128
129 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
130 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
131
132 ht_info->mcs.rx_mask[0] = 0xFF;
133 if (rx_chains_num >= 2)
134 ht_info->mcs.rx_mask[1] = 0xFF;
135 if (rx_chains_num >= 3)
136 ht_info->mcs.rx_mask[2] = 0xFF;
137
138 /* Highest supported Rx data rate */
139 max_bit_rate *= rx_chains_num;
140 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
141 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
142
143 /* Tx MCS capabilities */
144 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
145 if (tx_chains_num != rx_chains_num) {
146 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
147 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
148 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
149 }
150 }
151
152 /**
153 * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
154 */
155 int iwl_legacy_init_geos(struct iwl_priv *priv)
156 {
157 struct iwl_channel_info *ch;
158 struct ieee80211_supported_band *sband;
159 struct ieee80211_channel *channels;
160 struct ieee80211_channel *geo_ch;
161 struct ieee80211_rate *rates;
162 int i = 0;
163 s8 max_tx_power = 0;
164
165 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
166 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
167 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
168 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
169 return 0;
170 }
171
172 channels = kzalloc(sizeof(struct ieee80211_channel) *
173 priv->channel_count, GFP_KERNEL);
174 if (!channels)
175 return -ENOMEM;
176
177 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
178 GFP_KERNEL);
179 if (!rates) {
180 kfree(channels);
181 return -ENOMEM;
182 }
183
184 /* 5.2GHz channels start after the 2.4GHz channels */
185 sband = &priv->bands[IEEE80211_BAND_5GHZ];
186 sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
187 /* just OFDM */
188 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
189 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
190
191 if (priv->cfg->sku & IWL_SKU_N)
192 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
193 IEEE80211_BAND_5GHZ);
194
195 sband = &priv->bands[IEEE80211_BAND_2GHZ];
196 sband->channels = channels;
197 /* OFDM & CCK */
198 sband->bitrates = rates;
199 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
200
201 if (priv->cfg->sku & IWL_SKU_N)
202 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
203 IEEE80211_BAND_2GHZ);
204
205 priv->ieee_channels = channels;
206 priv->ieee_rates = rates;
207
208 for (i = 0; i < priv->channel_count; i++) {
209 ch = &priv->channel_info[i];
210
211 if (!iwl_legacy_is_channel_valid(ch))
212 continue;
213
214 sband = &priv->bands[ch->band];
215
216 geo_ch = &sband->channels[sband->n_channels++];
217
218 geo_ch->center_freq =
219 ieee80211_channel_to_frequency(ch->channel, ch->band);
220 geo_ch->max_power = ch->max_power_avg;
221 geo_ch->max_antenna_gain = 0xff;
222 geo_ch->hw_value = ch->channel;
223
224 if (iwl_legacy_is_channel_valid(ch)) {
225 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
226 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
227
228 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
229 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
230
231 if (ch->flags & EEPROM_CHANNEL_RADAR)
232 geo_ch->flags |= IEEE80211_CHAN_RADAR;
233
234 geo_ch->flags |= ch->ht40_extension_channel;
235
236 if (ch->max_power_avg > max_tx_power)
237 max_tx_power = ch->max_power_avg;
238 } else {
239 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
240 }
241
242 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
243 ch->channel, geo_ch->center_freq,
244 iwl_legacy_is_channel_a_band(ch) ? "5.2" : "2.4",
245 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
246 "restricted" : "valid",
247 geo_ch->flags);
248 }
249
250 priv->tx_power_device_lmt = max_tx_power;
251 priv->tx_power_user_lmt = max_tx_power;
252 priv->tx_power_next = max_tx_power;
253
254 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
255 priv->cfg->sku & IWL_SKU_A) {
256 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
257 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
258 priv->pci_dev->device,
259 priv->pci_dev->subsystem_device);
260 priv->cfg->sku &= ~IWL_SKU_A;
261 }
262
263 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
264 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
265 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
266
267 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
268
269 return 0;
270 }
271 EXPORT_SYMBOL(iwl_legacy_init_geos);
272
273 /*
274 * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
275 */
276 void iwl_legacy_free_geos(struct iwl_priv *priv)
277 {
278 kfree(priv->ieee_channels);
279 kfree(priv->ieee_rates);
280 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
281 }
282 EXPORT_SYMBOL(iwl_legacy_free_geos);
283
284 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
285 enum ieee80211_band band,
286 u16 channel, u8 extension_chan_offset)
287 {
288 const struct iwl_channel_info *ch_info;
289
290 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
291 if (!iwl_legacy_is_channel_valid(ch_info))
292 return false;
293
294 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
295 return !(ch_info->ht40_extension_channel &
296 IEEE80211_CHAN_NO_HT40PLUS);
297 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
298 return !(ch_info->ht40_extension_channel &
299 IEEE80211_CHAN_NO_HT40MINUS);
300
301 return false;
302 }
303
304 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
305 struct iwl_rxon_context *ctx,
306 struct ieee80211_sta_ht_cap *ht_cap)
307 {
308 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
309 return false;
310
311 /*
312 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
313 * the bit will not set if it is pure 40MHz case
314 */
315 if (ht_cap && !ht_cap->ht_supported)
316 return false;
317
318 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
319 if (priv->disable_ht40)
320 return false;
321 #endif
322
323 return iwl_legacy_is_channel_extension(priv, priv->band,
324 le16_to_cpu(ctx->staging.channel),
325 ctx->ht.extension_chan_offset);
326 }
327 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
328
329 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
330 {
331 u16 new_val;
332 u16 beacon_factor;
333
334 /*
335 * If mac80211 hasn't given us a beacon interval, program
336 * the default into the device.
337 */
338 if (!beacon_val)
339 return DEFAULT_BEACON_INTERVAL;
340
341 /*
342 * If the beacon interval we obtained from the peer
343 * is too large, we'll have to wake up more often
344 * (and in IBSS case, we'll beacon too much)
345 *
346 * For example, if max_beacon_val is 4096, and the
347 * requested beacon interval is 7000, we'll have to
348 * use 3500 to be able to wake up on the beacons.
349 *
350 * This could badly influence beacon detection stats.
351 */
352
353 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
354 new_val = beacon_val / beacon_factor;
355
356 if (!new_val)
357 new_val = max_beacon_val;
358
359 return new_val;
360 }
361
362 int
363 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
364 {
365 u64 tsf;
366 s32 interval_tm, rem;
367 struct ieee80211_conf *conf = NULL;
368 u16 beacon_int;
369 struct ieee80211_vif *vif = ctx->vif;
370
371 conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
372
373 lockdep_assert_held(&priv->mutex);
374
375 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
376
377 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
378 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
379
380 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
381
382 /*
383 * TODO: For IBSS we need to get atim_window from mac80211,
384 * for now just always use 0
385 */
386 ctx->timing.atim_window = 0;
387
388 beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
389 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
390 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
391
392 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
393 interval_tm = beacon_int * TIME_UNIT;
394 rem = do_div(tsf, interval_tm);
395 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
396
397 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
398
399 IWL_DEBUG_ASSOC(priv,
400 "beacon interval %d beacon timer %d beacon tim %d\n",
401 le16_to_cpu(ctx->timing.beacon_interval),
402 le32_to_cpu(ctx->timing.beacon_init_val),
403 le16_to_cpu(ctx->timing.atim_window));
404
405 return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
406 sizeof(ctx->timing), &ctx->timing);
407 }
408 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
409
410 void
411 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
412 struct iwl_rxon_context *ctx,
413 int hw_decrypt)
414 {
415 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
416
417 if (hw_decrypt)
418 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
419 else
420 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
421
422 }
423 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
424
425 /* validate RXON structure is valid */
426 int
427 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
428 {
429 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
430 bool error = false;
431
432 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
433 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
434 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
435 error = true;
436 }
437 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
438 IWL_WARN(priv, "check 2.4G: wrong radar\n");
439 error = true;
440 }
441 } else {
442 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
443 IWL_WARN(priv, "check 5.2G: not short slot!\n");
444 error = true;
445 }
446 if (rxon->flags & RXON_FLG_CCK_MSK) {
447 IWL_WARN(priv, "check 5.2G: CCK!\n");
448 error = true;
449 }
450 }
451 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
452 IWL_WARN(priv, "mac/bssid mcast!\n");
453 error = true;
454 }
455
456 /* make sure basic rates 6Mbps and 1Mbps are supported */
457 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
458 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
459 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
460 error = true;
461 }
462
463 if (le16_to_cpu(rxon->assoc_id) > 2007) {
464 IWL_WARN(priv, "aid > 2007\n");
465 error = true;
466 }
467
468 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
469 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
470 IWL_WARN(priv, "CCK and short slot\n");
471 error = true;
472 }
473
474 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
475 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
476 IWL_WARN(priv, "CCK and auto detect");
477 error = true;
478 }
479
480 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
481 RXON_FLG_TGG_PROTECT_MSK)) ==
482 RXON_FLG_TGG_PROTECT_MSK) {
483 IWL_WARN(priv, "TGg but no auto-detect\n");
484 error = true;
485 }
486
487 if (error)
488 IWL_WARN(priv, "Tuning to channel %d\n",
489 le16_to_cpu(rxon->channel));
490
491 if (error) {
492 IWL_ERR(priv, "Invalid RXON\n");
493 return -EINVAL;
494 }
495 return 0;
496 }
497 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
498
499 /**
500 * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
501 * @priv: staging_rxon is compared to active_rxon
502 *
503 * If the RXON structure is changing enough to require a new tune,
504 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
505 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
506 */
507 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
508 struct iwl_rxon_context *ctx)
509 {
510 const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
511 const struct iwl_legacy_rxon_cmd *active = &ctx->active;
512
513 #define CHK(cond) \
514 if ((cond)) { \
515 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
516 return 1; \
517 }
518
519 #define CHK_NEQ(c1, c2) \
520 if ((c1) != (c2)) { \
521 IWL_DEBUG_INFO(priv, "need full RXON - " \
522 #c1 " != " #c2 " - %d != %d\n", \
523 (c1), (c2)); \
524 return 1; \
525 }
526
527 /* These items are only settable from the full RXON command */
528 CHK(!iwl_legacy_is_associated_ctx(ctx));
529 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
530 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
531 CHK(compare_ether_addr(staging->wlap_bssid_addr,
532 active->wlap_bssid_addr));
533 CHK_NEQ(staging->dev_type, active->dev_type);
534 CHK_NEQ(staging->channel, active->channel);
535 CHK_NEQ(staging->air_propagation, active->air_propagation);
536 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
537 active->ofdm_ht_single_stream_basic_rates);
538 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
539 active->ofdm_ht_dual_stream_basic_rates);
540 CHK_NEQ(staging->assoc_id, active->assoc_id);
541
542 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
543 * be updated with the RXON_ASSOC command -- however only some
544 * flag transitions are allowed using RXON_ASSOC */
545
546 /* Check if we are not switching bands */
547 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
548 active->flags & RXON_FLG_BAND_24G_MSK);
549
550 /* Check if we are switching association toggle */
551 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
552 active->filter_flags & RXON_FILTER_ASSOC_MSK);
553
554 #undef CHK
555 #undef CHK_NEQ
556
557 return 0;
558 }
559 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
560
561 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
562 struct iwl_rxon_context *ctx)
563 {
564 /*
565 * Assign the lowest rate -- should really get this from
566 * the beacon skb from mac80211.
567 */
568 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
569 return IWL_RATE_1M_PLCP;
570 else
571 return IWL_RATE_6M_PLCP;
572 }
573 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
574
575 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
576 struct iwl_ht_config *ht_conf,
577 struct iwl_rxon_context *ctx)
578 {
579 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
580
581 if (!ctx->ht.enabled) {
582 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
583 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
584 RXON_FLG_HT40_PROT_MSK |
585 RXON_FLG_HT_PROT_MSK);
586 return;
587 }
588
589 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
590 RXON_FLG_HT_OPERATING_MODE_POS);
591
592 /* Set up channel bandwidth:
593 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
594 /* clear the HT channel mode before set the mode */
595 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
596 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
597 if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
598 /* pure ht40 */
599 if (ctx->ht.protection ==
600 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
601 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
602 /* Note: control channel is opposite of extension channel */
603 switch (ctx->ht.extension_chan_offset) {
604 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
605 rxon->flags &=
606 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
607 break;
608 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
609 rxon->flags |=
610 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
611 break;
612 }
613 } else {
614 /* Note: control channel is opposite of extension channel */
615 switch (ctx->ht.extension_chan_offset) {
616 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
617 rxon->flags &=
618 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
619 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
620 break;
621 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
622 rxon->flags |=
623 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
624 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
625 break;
626 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
627 default:
628 /* channel location only valid if in Mixed mode */
629 IWL_ERR(priv,
630 "invalid extension channel offset\n");
631 break;
632 }
633 }
634 } else {
635 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
636 }
637
638 if (priv->cfg->ops->hcmd->set_rxon_chain)
639 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
640
641 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
642 "extension channel offset 0x%x\n",
643 le32_to_cpu(rxon->flags), ctx->ht.protection,
644 ctx->ht.extension_chan_offset);
645 }
646
647 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
648 {
649 struct iwl_rxon_context *ctx;
650
651 for_each_context(priv, ctx)
652 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
653 }
654 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
655
656 /* Return valid, unused, channel for a passive scan to reset the RF */
657 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
658 enum ieee80211_band band)
659 {
660 const struct iwl_channel_info *ch_info;
661 int i;
662 u8 channel = 0;
663 u8 min, max;
664 struct iwl_rxon_context *ctx;
665
666 if (band == IEEE80211_BAND_5GHZ) {
667 min = 14;
668 max = priv->channel_count;
669 } else {
670 min = 0;
671 max = 14;
672 }
673
674 for (i = min; i < max; i++) {
675 bool busy = false;
676
677 for_each_context(priv, ctx) {
678 busy = priv->channel_info[i].channel ==
679 le16_to_cpu(ctx->staging.channel);
680 if (busy)
681 break;
682 }
683
684 if (busy)
685 continue;
686
687 channel = priv->channel_info[i].channel;
688 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
689 if (iwl_legacy_is_channel_valid(ch_info))
690 break;
691 }
692
693 return channel;
694 }
695 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
696
697 /**
698 * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
699 * @ch: requested channel as a pointer to struct ieee80211_channel
700
701 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
702 * in the staging RXON flag structure based on the ch->band
703 */
704 int
705 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
706 struct iwl_rxon_context *ctx)
707 {
708 enum ieee80211_band band = ch->band;
709 u16 channel = ch->hw_value;
710
711 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
712 (priv->band == band))
713 return 0;
714
715 ctx->staging.channel = cpu_to_le16(channel);
716 if (band == IEEE80211_BAND_5GHZ)
717 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
718 else
719 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
720
721 priv->band = band;
722
723 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
724
725 return 0;
726 }
727 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
728
729 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
730 struct iwl_rxon_context *ctx,
731 enum ieee80211_band band,
732 struct ieee80211_vif *vif)
733 {
734 if (band == IEEE80211_BAND_5GHZ) {
735 ctx->staging.flags &=
736 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
737 | RXON_FLG_CCK_MSK);
738 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
739 } else {
740 /* Copied from iwl_post_associate() */
741 if (vif && vif->bss_conf.use_short_slot)
742 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
743 else
744 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
745
746 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
747 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
748 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
749 }
750 }
751 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
752
753 /*
754 * initialize rxon structure with default values from eeprom
755 */
756 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
757 struct iwl_rxon_context *ctx)
758 {
759 const struct iwl_channel_info *ch_info;
760
761 memset(&ctx->staging, 0, sizeof(ctx->staging));
762
763 if (!ctx->vif) {
764 ctx->staging.dev_type = ctx->unused_devtype;
765 } else
766 switch (ctx->vif->type) {
767
768 case NL80211_IFTYPE_STATION:
769 ctx->staging.dev_type = ctx->station_devtype;
770 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
771 break;
772
773 case NL80211_IFTYPE_ADHOC:
774 ctx->staging.dev_type = ctx->ibss_devtype;
775 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
776 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
777 RXON_FILTER_ACCEPT_GRP_MSK;
778 break;
779
780 default:
781 IWL_ERR(priv, "Unsupported interface type %d\n",
782 ctx->vif->type);
783 break;
784 }
785
786 #if 0
787 /* TODO: Figure out when short_preamble would be set and cache from
788 * that */
789 if (!hw_to_local(priv->hw)->short_preamble)
790 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
791 else
792 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
793 #endif
794
795 ch_info = iwl_legacy_get_channel_info(priv, priv->band,
796 le16_to_cpu(ctx->active.channel));
797
798 if (!ch_info)
799 ch_info = &priv->channel_info[0];
800
801 ctx->staging.channel = cpu_to_le16(ch_info->channel);
802 priv->band = ch_info->band;
803
804 iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
805
806 ctx->staging.ofdm_basic_rates =
807 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
808 ctx->staging.cck_basic_rates =
809 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
810
811 /* clear both MIX and PURE40 mode flag */
812 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
813 RXON_FLG_CHANNEL_MODE_PURE_40);
814 if (ctx->vif)
815 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
816
817 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
818 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
819 }
820 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
821
822 void iwl_legacy_set_rate(struct iwl_priv *priv)
823 {
824 const struct ieee80211_supported_band *hw = NULL;
825 struct ieee80211_rate *rate;
826 struct iwl_rxon_context *ctx;
827 int i;
828
829 hw = iwl_get_hw_mode(priv, priv->band);
830 if (!hw) {
831 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
832 return;
833 }
834
835 priv->active_rate = 0;
836
837 for (i = 0; i < hw->n_bitrates; i++) {
838 rate = &(hw->bitrates[i]);
839 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
840 priv->active_rate |= (1 << rate->hw_value);
841 }
842
843 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
844
845 for_each_context(priv, ctx) {
846 ctx->staging.cck_basic_rates =
847 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
848
849 ctx->staging.ofdm_basic_rates =
850 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
851 }
852 }
853 EXPORT_SYMBOL(iwl_legacy_set_rate);
854
855 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
856 {
857 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
858
859 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
860 return;
861
862 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
863 ieee80211_chswitch_done(ctx->vif, is_success);
864 }
865 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
866
867 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
868 {
869 struct iwl_rx_packet *pkt = rxb_addr(rxb);
870 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
871
872 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
873 struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
874
875 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
876 return;
877
878 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
879 rxon->channel = csa->channel;
880 ctx->staging.channel = csa->channel;
881 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
882 le16_to_cpu(csa->channel));
883 iwl_legacy_chswitch_done(priv, true);
884 } else {
885 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
886 le16_to_cpu(csa->channel));
887 iwl_legacy_chswitch_done(priv, false);
888 }
889 }
890 EXPORT_SYMBOL(iwl_legacy_rx_csa);
891
892 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
893 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
894 struct iwl_rxon_context *ctx)
895 {
896 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
897
898 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
899 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
900 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
901 le16_to_cpu(rxon->channel));
902 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
903 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
904 le32_to_cpu(rxon->filter_flags));
905 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
906 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
907 rxon->ofdm_basic_rates);
908 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
909 rxon->cck_basic_rates);
910 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
911 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
912 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
913 le16_to_cpu(rxon->assoc_id));
914 }
915 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
916 #endif
917 /**
918 * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
919 */
920 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
921 {
922 /* Set the FW error flag -- cleared on iwl_down */
923 set_bit(STATUS_FW_ERROR, &priv->status);
924
925 /* Cancel currently queued command. */
926 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
927
928 IWL_ERR(priv, "Loaded firmware version: %s\n",
929 priv->hw->wiphy->fw_version);
930
931 priv->cfg->ops->lib->dump_nic_error_log(priv);
932 if (priv->cfg->ops->lib->dump_fh)
933 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
934 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
935 if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
936 iwl_legacy_print_rx_config_cmd(priv,
937 &priv->contexts[IWL_RXON_CTX_BSS]);
938 #endif
939
940 wake_up_interruptible(&priv->wait_command_queue);
941
942 /* Keep the restart process from trying to send host
943 * commands by clearing the INIT status bit */
944 clear_bit(STATUS_READY, &priv->status);
945
946 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
947 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
948 "Restarting adapter due to uCode error.\n");
949
950 if (priv->cfg->mod_params->restart_fw)
951 queue_work(priv->workqueue, &priv->restart);
952 }
953 }
954 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
955
956 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
957 {
958 int ret = 0;
959
960 /* stop device's busmaster DMA activity */
961 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
962
963 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
964 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
965 if (ret)
966 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
967
968 IWL_DEBUG_INFO(priv, "stop master\n");
969
970 return ret;
971 }
972
973 void iwl_legacy_apm_stop(struct iwl_priv *priv)
974 {
975 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
976
977 /* Stop device's DMA activity */
978 iwl_legacy_apm_stop_master(priv);
979
980 /* Reset the entire device */
981 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
982
983 udelay(10);
984
985 /*
986 * Clear "initialization complete" bit to move adapter from
987 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
988 */
989 iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
990 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
991 }
992 EXPORT_SYMBOL(iwl_legacy_apm_stop);
993
994
995 /*
996 * Start up NIC's basic functionality after it has been reset
997 * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
998 * NOTE: This does not load uCode nor start the embedded processor
999 */
1000 int iwl_legacy_apm_init(struct iwl_priv *priv)
1001 {
1002 int ret = 0;
1003 u16 lctl;
1004
1005 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1006
1007 /*
1008 * Use "set_bit" below rather than "write", to preserve any hardware
1009 * bits already set by default after reset.
1010 */
1011
1012 /* Disable L0S exit timer (platform NMI Work/Around) */
1013 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1014 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1015
1016 /*
1017 * Disable L0s without affecting L1;
1018 * don't wait for ICH L0s (ICH bug W/A)
1019 */
1020 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1021 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1022
1023 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1024 iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1025 CSR_DBG_HPET_MEM_REG_VAL);
1026
1027 /*
1028 * Enable HAP INTA (interrupt from management bus) to
1029 * wake device's PCI Express link L1a -> L0s
1030 * NOTE: This is no-op for 3945 (non-existent bit)
1031 */
1032 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1033 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1034
1035 /*
1036 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1037 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1038 * If so (likely), disable L0S, so device moves directly L0->L1;
1039 * costs negligible amount of power savings.
1040 * If not (unlikely), enable L0S, so there is at least some
1041 * power savings, even without L1.
1042 */
1043 if (priv->cfg->base_params->set_l0s) {
1044 lctl = iwl_legacy_pcie_link_ctl(priv);
1045 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1046 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1047 /* L1-ASPM enabled; disable(!) L0S */
1048 iwl_legacy_set_bit(priv, CSR_GIO_REG,
1049 CSR_GIO_REG_VAL_L0S_ENABLED);
1050 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1051 } else {
1052 /* L1-ASPM disabled; enable(!) L0S */
1053 iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1054 CSR_GIO_REG_VAL_L0S_ENABLED);
1055 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1056 }
1057 }
1058
1059 /* Configure analog phase-lock-loop before activating to D0A */
1060 if (priv->cfg->base_params->pll_cfg_val)
1061 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1062 priv->cfg->base_params->pll_cfg_val);
1063
1064 /*
1065 * Set "initialization complete" bit to move adapter from
1066 * D0U* --> D0A* (powered-up active) state.
1067 */
1068 iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1069
1070 /*
1071 * Wait for clock stabilization; once stabilized, access to
1072 * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1073 * and accesses to uCode SRAM.
1074 */
1075 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1076 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1077 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1078 if (ret < 0) {
1079 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1080 goto out;
1081 }
1082
1083 /*
1084 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1085 * BSM (Boostrap State Machine) is only in 3945 and 4965.
1086 *
1087 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1088 * do not disable clocks. This preserves any hardware bits already
1089 * set by default in "CLK_CTRL_REG" after reset.
1090 */
1091 if (priv->cfg->base_params->use_bsm)
1092 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1093 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1094 else
1095 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1096 APMG_CLK_VAL_DMA_CLK_RQT);
1097 udelay(20);
1098
1099 /* Disable L1-Active */
1100 iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1101 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1102
1103 out:
1104 return ret;
1105 }
1106 EXPORT_SYMBOL(iwl_legacy_apm_init);
1107
1108
1109 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1110 {
1111 int ret;
1112 s8 prev_tx_power;
1113 bool defer;
1114 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1115
1116 lockdep_assert_held(&priv->mutex);
1117
1118 if (priv->tx_power_user_lmt == tx_power && !force)
1119 return 0;
1120
1121 if (!priv->cfg->ops->lib->send_tx_power)
1122 return -EOPNOTSUPP;
1123
1124 /* 0 dBm mean 1 milliwatt */
1125 if (tx_power < 0) {
1126 IWL_WARN(priv,
1127 "Requested user TXPOWER %d below 1 mW.\n",
1128 tx_power);
1129 return -EINVAL;
1130 }
1131
1132 if (tx_power > priv->tx_power_device_lmt) {
1133 IWL_WARN(priv,
1134 "Requested user TXPOWER %d above upper limit %d.\n",
1135 tx_power, priv->tx_power_device_lmt);
1136 return -EINVAL;
1137 }
1138
1139 if (!iwl_legacy_is_ready_rf(priv))
1140 return -EIO;
1141
1142 /* scan complete and commit_rxon use tx_power_next value,
1143 * it always need to be updated for newest request */
1144 priv->tx_power_next = tx_power;
1145
1146 /* do not set tx power when scanning or channel changing */
1147 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1148 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1149 if (defer && !force) {
1150 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1151 return 0;
1152 }
1153
1154 prev_tx_power = priv->tx_power_user_lmt;
1155 priv->tx_power_user_lmt = tx_power;
1156
1157 ret = priv->cfg->ops->lib->send_tx_power(priv);
1158
1159 /* if fail to set tx_power, restore the orig. tx power */
1160 if (ret) {
1161 priv->tx_power_user_lmt = prev_tx_power;
1162 priv->tx_power_next = prev_tx_power;
1163 }
1164 return ret;
1165 }
1166 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1167
1168 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1169 {
1170 struct iwl_bt_cmd bt_cmd = {
1171 .lead_time = BT_LEAD_TIME_DEF,
1172 .max_kill = BT_MAX_KILL_DEF,
1173 .kill_ack_mask = 0,
1174 .kill_cts_mask = 0,
1175 };
1176
1177 if (!bt_coex_active)
1178 bt_cmd.flags = BT_COEX_DISABLE;
1179 else
1180 bt_cmd.flags = BT_COEX_ENABLE;
1181
1182 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1183 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1184
1185 if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1186 sizeof(struct iwl_bt_cmd), &bt_cmd))
1187 IWL_ERR(priv, "failed to send BT Coex Config\n");
1188 }
1189 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1190
1191 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1192 {
1193 struct iwl_statistics_cmd statistics_cmd = {
1194 .configuration_flags =
1195 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1196 };
1197
1198 if (flags & CMD_ASYNC)
1199 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1200 sizeof(struct iwl_statistics_cmd),
1201 &statistics_cmd, NULL);
1202 else
1203 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1204 sizeof(struct iwl_statistics_cmd),
1205 &statistics_cmd);
1206 }
1207 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1208
1209 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1210 struct iwl_rx_mem_buffer *rxb)
1211 {
1212 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1213 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1214 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1215 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1216 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1217 #endif
1218 }
1219 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1220
1221 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1222 struct iwl_rx_mem_buffer *rxb)
1223 {
1224 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1225 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1226 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1227 "notification for %s:\n", len,
1228 iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1229 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1230 }
1231 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1232
1233 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1234 struct iwl_rx_mem_buffer *rxb)
1235 {
1236 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1237
1238 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1239 "seq 0x%04X ser 0x%08X\n",
1240 le32_to_cpu(pkt->u.err_resp.error_type),
1241 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1242 pkt->u.err_resp.cmd_id,
1243 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1244 le32_to_cpu(pkt->u.err_resp.error_info));
1245 }
1246 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1247
1248 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1249 {
1250 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1251 }
1252
1253 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1254 const struct ieee80211_tx_queue_params *params)
1255 {
1256 struct iwl_priv *priv = hw->priv;
1257 struct iwl_rxon_context *ctx;
1258 unsigned long flags;
1259 int q;
1260
1261 IWL_DEBUG_MAC80211(priv, "enter\n");
1262
1263 if (!iwl_legacy_is_ready_rf(priv)) {
1264 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1265 return -EIO;
1266 }
1267
1268 if (queue >= AC_NUM) {
1269 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1270 return 0;
1271 }
1272
1273 q = AC_NUM - 1 - queue;
1274
1275 spin_lock_irqsave(&priv->lock, flags);
1276
1277 for_each_context(priv, ctx) {
1278 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1279 cpu_to_le16(params->cw_min);
1280 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1281 cpu_to_le16(params->cw_max);
1282 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1283 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1284 cpu_to_le16((params->txop * 32));
1285
1286 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1287 }
1288
1289 spin_unlock_irqrestore(&priv->lock, flags);
1290
1291 IWL_DEBUG_MAC80211(priv, "leave\n");
1292 return 0;
1293 }
1294 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1295
1296 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1297 {
1298 struct iwl_priv *priv = hw->priv;
1299
1300 return priv->ibss_manager == IWL_IBSS_MANAGER;
1301 }
1302 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1303
1304 static int
1305 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1306 {
1307 iwl_legacy_connection_init_rx_config(priv, ctx);
1308
1309 if (priv->cfg->ops->hcmd->set_rxon_chain)
1310 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1311
1312 return iwl_legacy_commit_rxon(priv, ctx);
1313 }
1314
1315 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1316 struct iwl_rxon_context *ctx)
1317 {
1318 struct ieee80211_vif *vif = ctx->vif;
1319 int err;
1320
1321 lockdep_assert_held(&priv->mutex);
1322
1323 /*
1324 * This variable will be correct only when there's just
1325 * a single context, but all code using it is for hardware
1326 * that supports only one context.
1327 */
1328 priv->iw_mode = vif->type;
1329
1330 ctx->is_active = true;
1331
1332 err = iwl_legacy_set_mode(priv, ctx);
1333 if (err) {
1334 if (!ctx->always_active)
1335 ctx->is_active = false;
1336 return err;
1337 }
1338
1339 return 0;
1340 }
1341
1342 int
1343 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1344 {
1345 struct iwl_priv *priv = hw->priv;
1346 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1347 struct iwl_rxon_context *tmp, *ctx = NULL;
1348 int err;
1349
1350 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1351 vif->type, vif->addr);
1352
1353 mutex_lock(&priv->mutex);
1354
1355 if (!iwl_legacy_is_ready_rf(priv)) {
1356 IWL_WARN(priv, "Try to add interface when device not ready\n");
1357 err = -EINVAL;
1358 goto out;
1359 }
1360
1361 for_each_context(priv, tmp) {
1362 u32 possible_modes =
1363 tmp->interface_modes | tmp->exclusive_interface_modes;
1364
1365 if (tmp->vif) {
1366 /* check if this busy context is exclusive */
1367 if (tmp->exclusive_interface_modes &
1368 BIT(tmp->vif->type)) {
1369 err = -EINVAL;
1370 goto out;
1371 }
1372 continue;
1373 }
1374
1375 if (!(possible_modes & BIT(vif->type)))
1376 continue;
1377
1378 /* have maybe usable context w/o interface */
1379 ctx = tmp;
1380 break;
1381 }
1382
1383 if (!ctx) {
1384 err = -EOPNOTSUPP;
1385 goto out;
1386 }
1387
1388 vif_priv->ctx = ctx;
1389 ctx->vif = vif;
1390
1391 err = iwl_legacy_setup_interface(priv, ctx);
1392 if (!err)
1393 goto out;
1394
1395 ctx->vif = NULL;
1396 priv->iw_mode = NL80211_IFTYPE_STATION;
1397 out:
1398 mutex_unlock(&priv->mutex);
1399
1400 IWL_DEBUG_MAC80211(priv, "leave\n");
1401 return err;
1402 }
1403 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1404
1405 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1406 struct ieee80211_vif *vif,
1407 bool mode_change)
1408 {
1409 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1410
1411 lockdep_assert_held(&priv->mutex);
1412
1413 if (priv->scan_vif == vif) {
1414 iwl_legacy_scan_cancel_timeout(priv, 200);
1415 iwl_legacy_force_scan_end(priv);
1416 }
1417
1418 if (!mode_change) {
1419 iwl_legacy_set_mode(priv, ctx);
1420 if (!ctx->always_active)
1421 ctx->is_active = false;
1422 }
1423 }
1424
1425 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1426 struct ieee80211_vif *vif)
1427 {
1428 struct iwl_priv *priv = hw->priv;
1429 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1430
1431 IWL_DEBUG_MAC80211(priv, "enter\n");
1432
1433 mutex_lock(&priv->mutex);
1434
1435 WARN_ON(ctx->vif != vif);
1436 ctx->vif = NULL;
1437
1438 iwl_legacy_teardown_interface(priv, vif, false);
1439
1440 memset(priv->bssid, 0, ETH_ALEN);
1441 mutex_unlock(&priv->mutex);
1442
1443 IWL_DEBUG_MAC80211(priv, "leave\n");
1444
1445 }
1446 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1447
1448 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1449 {
1450 if (!priv->txq)
1451 priv->txq = kzalloc(
1452 sizeof(struct iwl_tx_queue) *
1453 priv->cfg->base_params->num_of_queues,
1454 GFP_KERNEL);
1455 if (!priv->txq) {
1456 IWL_ERR(priv, "Not enough memory for txq\n");
1457 return -ENOMEM;
1458 }
1459 return 0;
1460 }
1461 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1462
1463 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1464 {
1465 kfree(priv->txq);
1466 priv->txq = NULL;
1467 }
1468 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1469
1470 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1471
1472 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1473
1474 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1475 {
1476 priv->tx_traffic_idx = 0;
1477 priv->rx_traffic_idx = 0;
1478 if (priv->tx_traffic)
1479 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1480 if (priv->rx_traffic)
1481 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1482 }
1483
1484 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1485 {
1486 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1487
1488 if (iwlegacy_debug_level & IWL_DL_TX) {
1489 if (!priv->tx_traffic) {
1490 priv->tx_traffic =
1491 kzalloc(traffic_size, GFP_KERNEL);
1492 if (!priv->tx_traffic)
1493 return -ENOMEM;
1494 }
1495 }
1496 if (iwlegacy_debug_level & IWL_DL_RX) {
1497 if (!priv->rx_traffic) {
1498 priv->rx_traffic =
1499 kzalloc(traffic_size, GFP_KERNEL);
1500 if (!priv->rx_traffic)
1501 return -ENOMEM;
1502 }
1503 }
1504 iwl_legacy_reset_traffic_log(priv);
1505 return 0;
1506 }
1507 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1508
1509 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1510 {
1511 kfree(priv->tx_traffic);
1512 priv->tx_traffic = NULL;
1513
1514 kfree(priv->rx_traffic);
1515 priv->rx_traffic = NULL;
1516 }
1517 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1518
1519 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1520 u16 length, struct ieee80211_hdr *header)
1521 {
1522 __le16 fc;
1523 u16 len;
1524
1525 if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1526 return;
1527
1528 if (!priv->tx_traffic)
1529 return;
1530
1531 fc = header->frame_control;
1532 if (ieee80211_is_data(fc)) {
1533 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1534 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1535 memcpy((priv->tx_traffic +
1536 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1537 header, len);
1538 priv->tx_traffic_idx =
1539 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1540 }
1541 }
1542 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1543
1544 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1545 u16 length, struct ieee80211_hdr *header)
1546 {
1547 __le16 fc;
1548 u16 len;
1549
1550 if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1551 return;
1552
1553 if (!priv->rx_traffic)
1554 return;
1555
1556 fc = header->frame_control;
1557 if (ieee80211_is_data(fc)) {
1558 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1559 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1560 memcpy((priv->rx_traffic +
1561 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1562 header, len);
1563 priv->rx_traffic_idx =
1564 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1565 }
1566 }
1567 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1568
1569 const char *iwl_legacy_get_mgmt_string(int cmd)
1570 {
1571 switch (cmd) {
1572 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1573 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1574 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1575 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1576 IWL_CMD(MANAGEMENT_PROBE_REQ);
1577 IWL_CMD(MANAGEMENT_PROBE_RESP);
1578 IWL_CMD(MANAGEMENT_BEACON);
1579 IWL_CMD(MANAGEMENT_ATIM);
1580 IWL_CMD(MANAGEMENT_DISASSOC);
1581 IWL_CMD(MANAGEMENT_AUTH);
1582 IWL_CMD(MANAGEMENT_DEAUTH);
1583 IWL_CMD(MANAGEMENT_ACTION);
1584 default:
1585 return "UNKNOWN";
1586
1587 }
1588 }
1589
1590 const char *iwl_legacy_get_ctrl_string(int cmd)
1591 {
1592 switch (cmd) {
1593 IWL_CMD(CONTROL_BACK_REQ);
1594 IWL_CMD(CONTROL_BACK);
1595 IWL_CMD(CONTROL_PSPOLL);
1596 IWL_CMD(CONTROL_RTS);
1597 IWL_CMD(CONTROL_CTS);
1598 IWL_CMD(CONTROL_ACK);
1599 IWL_CMD(CONTROL_CFEND);
1600 IWL_CMD(CONTROL_CFENDACK);
1601 default:
1602 return "UNKNOWN";
1603
1604 }
1605 }
1606
1607 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1608 {
1609 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1610 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1611 }
1612
1613 /*
1614 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1615 * iwl_legacy_update_stats function will
1616 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1617 * Use debugFs to display the rx/rx_statistics
1618 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1619 * information will be recorded, but DATA pkt still will be recorded
1620 * for the reason of iwl_led.c need to control the led blinking based on
1621 * number of tx and rx data.
1622 *
1623 */
1624 void
1625 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1626 {
1627 struct traffic_stats *stats;
1628
1629 if (is_tx)
1630 stats = &priv->tx_stats;
1631 else
1632 stats = &priv->rx_stats;
1633
1634 if (ieee80211_is_mgmt(fc)) {
1635 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1636 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1637 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1638 break;
1639 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1640 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1641 break;
1642 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1643 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1644 break;
1645 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1646 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1647 break;
1648 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1649 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1650 break;
1651 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1652 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1653 break;
1654 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1655 stats->mgmt[MANAGEMENT_BEACON]++;
1656 break;
1657 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1658 stats->mgmt[MANAGEMENT_ATIM]++;
1659 break;
1660 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1661 stats->mgmt[MANAGEMENT_DISASSOC]++;
1662 break;
1663 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1664 stats->mgmt[MANAGEMENT_AUTH]++;
1665 break;
1666 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1667 stats->mgmt[MANAGEMENT_DEAUTH]++;
1668 break;
1669 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1670 stats->mgmt[MANAGEMENT_ACTION]++;
1671 break;
1672 }
1673 } else if (ieee80211_is_ctl(fc)) {
1674 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1675 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1676 stats->ctrl[CONTROL_BACK_REQ]++;
1677 break;
1678 case cpu_to_le16(IEEE80211_STYPE_BACK):
1679 stats->ctrl[CONTROL_BACK]++;
1680 break;
1681 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1682 stats->ctrl[CONTROL_PSPOLL]++;
1683 break;
1684 case cpu_to_le16(IEEE80211_STYPE_RTS):
1685 stats->ctrl[CONTROL_RTS]++;
1686 break;
1687 case cpu_to_le16(IEEE80211_STYPE_CTS):
1688 stats->ctrl[CONTROL_CTS]++;
1689 break;
1690 case cpu_to_le16(IEEE80211_STYPE_ACK):
1691 stats->ctrl[CONTROL_ACK]++;
1692 break;
1693 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1694 stats->ctrl[CONTROL_CFEND]++;
1695 break;
1696 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1697 stats->ctrl[CONTROL_CFENDACK]++;
1698 break;
1699 }
1700 } else {
1701 /* data */
1702 stats->data_cnt++;
1703 stats->data_bytes += len;
1704 }
1705 }
1706 EXPORT_SYMBOL(iwl_legacy_update_stats);
1707 #endif
1708
1709 int iwl_legacy_force_reset(struct iwl_priv *priv, bool external)
1710 {
1711 struct iwl_force_reset *force_reset;
1712
1713 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1714 return -EINVAL;
1715
1716 force_reset = &priv->force_reset;
1717 force_reset->reset_request_count++;
1718 if (!external) {
1719 if (force_reset->last_force_reset_jiffies &&
1720 time_after(force_reset->last_force_reset_jiffies +
1721 force_reset->reset_duration, jiffies)) {
1722 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1723 force_reset->reset_reject_count++;
1724 return -EAGAIN;
1725 }
1726 }
1727 force_reset->reset_success_count++;
1728 force_reset->last_force_reset_jiffies = jiffies;
1729
1730 /*
1731 * if the request is from external(ex: debugfs),
1732 * then always perform the request in regardless the module
1733 * parameter setting
1734 * if the request is from internal (uCode error or driver
1735 * detect failure), then fw_restart module parameter
1736 * need to be check before performing firmware reload
1737 */
1738
1739 if (!external && !priv->cfg->mod_params->restart_fw) {
1740 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1741 "module parameter setting\n");
1742 return 0;
1743 }
1744
1745 IWL_ERR(priv, "On demand firmware reload\n");
1746
1747 /* Set the FW error flag -- cleared on iwl_down */
1748 set_bit(STATUS_FW_ERROR, &priv->status);
1749 wake_up_interruptible(&priv->wait_command_queue);
1750 /*
1751 * Keep the restart process from trying to send host
1752 * commands by clearing the INIT status bit
1753 */
1754 clear_bit(STATUS_READY, &priv->status);
1755 queue_work(priv->workqueue, &priv->restart);
1756
1757 return 0;
1758 }
1759
1760 int
1761 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1762 struct ieee80211_vif *vif,
1763 enum nl80211_iftype newtype, bool newp2p)
1764 {
1765 struct iwl_priv *priv = hw->priv;
1766 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1767 struct iwl_rxon_context *tmp;
1768 u32 interface_modes;
1769 int err;
1770
1771 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1772
1773 mutex_lock(&priv->mutex);
1774
1775 if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1776 /*
1777 * Huh? But wait ... this can maybe happen when
1778 * we're in the middle of a firmware restart!
1779 */
1780 err = -EBUSY;
1781 goto out;
1782 }
1783
1784 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1785
1786 if (!(interface_modes & BIT(newtype))) {
1787 err = -EBUSY;
1788 goto out;
1789 }
1790
1791 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1792 for_each_context(priv, tmp) {
1793 if (ctx == tmp)
1794 continue;
1795
1796 if (!tmp->vif)
1797 continue;
1798
1799 /*
1800 * The current mode switch would be exclusive, but
1801 * another context is active ... refuse the switch.
1802 */
1803 err = -EBUSY;
1804 goto out;
1805 }
1806 }
1807
1808 /* success */
1809 iwl_legacy_teardown_interface(priv, vif, true);
1810 vif->type = newtype;
1811 vif->p2p = newp2p;
1812 err = iwl_legacy_setup_interface(priv, ctx);
1813 WARN_ON(err);
1814 /*
1815 * We've switched internally, but submitting to the
1816 * device may have failed for some reason. Mask this
1817 * error, because otherwise mac80211 will not switch
1818 * (and set the interface type back) and we'll be
1819 * out of sync with it.
1820 */
1821 err = 0;
1822
1823 out:
1824 mutex_unlock(&priv->mutex);
1825 return err;
1826 }
1827 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1828
1829 /*
1830 * On every watchdog tick we check (latest) time stamp. If it does not
1831 * change during timeout period and queue is not empty we reset firmware.
1832 */
1833 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1834 {
1835 struct iwl_tx_queue *txq = &priv->txq[cnt];
1836 struct iwl_queue *q = &txq->q;
1837 unsigned long timeout;
1838 int ret;
1839
1840 if (q->read_ptr == q->write_ptr) {
1841 txq->time_stamp = jiffies;
1842 return 0;
1843 }
1844
1845 timeout = txq->time_stamp +
1846 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1847
1848 if (time_after(jiffies, timeout)) {
1849 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1850 q->id, priv->cfg->base_params->wd_timeout);
1851 ret = iwl_legacy_force_reset(priv, false);
1852 return (ret == -EAGAIN) ? 0 : 1;
1853 }
1854
1855 return 0;
1856 }
1857
1858 /*
1859 * Making watchdog tick be a quarter of timeout assure we will
1860 * discover the queue hung between timeout and 1.25*timeout
1861 */
1862 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1863
1864 /*
1865 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1866 * we reset the firmware. If everything is fine just rearm the timer.
1867 */
1868 void iwl_legacy_bg_watchdog(unsigned long data)
1869 {
1870 struct iwl_priv *priv = (struct iwl_priv *)data;
1871 int cnt;
1872 unsigned long timeout;
1873
1874 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1875 return;
1876
1877 timeout = priv->cfg->base_params->wd_timeout;
1878 if (timeout == 0)
1879 return;
1880
1881 /* monitor and check for stuck cmd queue */
1882 if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1883 return;
1884
1885 /* monitor and check for other stuck queues */
1886 if (iwl_legacy_is_any_associated(priv)) {
1887 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1888 /* skip as we already checked the command queue */
1889 if (cnt == priv->cmd_queue)
1890 continue;
1891 if (iwl_legacy_check_stuck_queue(priv, cnt))
1892 return;
1893 }
1894 }
1895
1896 mod_timer(&priv->watchdog, jiffies +
1897 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1898 }
1899 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1900
1901 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1902 {
1903 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1904
1905 if (timeout)
1906 mod_timer(&priv->watchdog,
1907 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1908 else
1909 del_timer(&priv->watchdog);
1910 }
1911 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1912
1913 /*
1914 * extended beacon time format
1915 * time in usec will be changed into a 32-bit value in extended:internal format
1916 * the extended part is the beacon counts
1917 * the internal part is the time in usec within one beacon interval
1918 */
1919 u32
1920 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1921 u32 usec, u32 beacon_interval)
1922 {
1923 u32 quot;
1924 u32 rem;
1925 u32 interval = beacon_interval * TIME_UNIT;
1926
1927 if (!interval || !usec)
1928 return 0;
1929
1930 quot = (usec / interval) &
1931 (iwl_legacy_beacon_time_mask_high(priv,
1932 priv->hw_params.beacon_time_tsf_bits) >>
1933 priv->hw_params.beacon_time_tsf_bits);
1934 rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1935 priv->hw_params.beacon_time_tsf_bits);
1936
1937 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1938 }
1939 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1940
1941 /* base is usually what we get from ucode with each received frame,
1942 * the same as HW timer counter counting down
1943 */
1944 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1945 u32 addon, u32 beacon_interval)
1946 {
1947 u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1948 priv->hw_params.beacon_time_tsf_bits);
1949 u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1950 priv->hw_params.beacon_time_tsf_bits);
1951 u32 interval = beacon_interval * TIME_UNIT;
1952 u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1953 priv->hw_params.beacon_time_tsf_bits)) +
1954 (addon & iwl_legacy_beacon_time_mask_high(priv,
1955 priv->hw_params.beacon_time_tsf_bits));
1956
1957 if (base_low > addon_low)
1958 res += base_low - addon_low;
1959 else if (base_low < addon_low) {
1960 res += interval + base_low - addon_low;
1961 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1962 } else
1963 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1964
1965 return cpu_to_le32(res);
1966 }
1967 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
1968
1969 #ifdef CONFIG_PM
1970
1971 int iwl_legacy_pci_suspend(struct device *device)
1972 {
1973 struct pci_dev *pdev = to_pci_dev(device);
1974 struct iwl_priv *priv = pci_get_drvdata(pdev);
1975
1976 /*
1977 * This function is called when system goes into suspend state
1978 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1979 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1980 * it will not call apm_ops.stop() to stop the DMA operation.
1981 * Calling apm_ops.stop here to make sure we stop the DMA.
1982 */
1983 iwl_legacy_apm_stop(priv);
1984
1985 return 0;
1986 }
1987 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
1988
1989 int iwl_legacy_pci_resume(struct device *device)
1990 {
1991 struct pci_dev *pdev = to_pci_dev(device);
1992 struct iwl_priv *priv = pci_get_drvdata(pdev);
1993 bool hw_rfkill = false;
1994
1995 /*
1996 * We disable the RETRY_TIMEOUT register (0x41) to keep
1997 * PCI Tx retries from interfering with C3 CPU state.
1998 */
1999 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2000
2001 iwl_legacy_enable_interrupts(priv);
2002
2003 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2004 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2005 hw_rfkill = true;
2006
2007 if (hw_rfkill)
2008 set_bit(STATUS_RF_KILL_HW, &priv->status);
2009 else
2010 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2011
2012 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2013
2014 return 0;
2015 }
2016 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2017
2018 const struct dev_pm_ops iwl_legacy_pm_ops = {
2019 .suspend = iwl_legacy_pci_suspend,
2020 .resume = iwl_legacy_pci_resume,
2021 .freeze = iwl_legacy_pci_suspend,
2022 .thaw = iwl_legacy_pci_resume,
2023 .poweroff = iwl_legacy_pci_suspend,
2024 .restore = iwl_legacy_pci_resume,
2025 };
2026 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2027
2028 #endif /* CONFIG_PM */
2029
2030 static void
2031 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2032 {
2033 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2034 return;
2035
2036 if (!ctx->is_active)
2037 return;
2038
2039 ctx->qos_data.def_qos_parm.qos_flags = 0;
2040
2041 if (ctx->qos_data.qos_active)
2042 ctx->qos_data.def_qos_parm.qos_flags |=
2043 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2044
2045 if (ctx->ht.enabled)
2046 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2047
2048 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2049 ctx->qos_data.qos_active,
2050 ctx->qos_data.def_qos_parm.qos_flags);
2051
2052 iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2053 sizeof(struct iwl_qosparam_cmd),
2054 &ctx->qos_data.def_qos_parm, NULL);
2055 }
2056
2057 /**
2058 * iwl_legacy_mac_config - mac80211 config callback
2059 */
2060 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2061 {
2062 struct iwl_priv *priv = hw->priv;
2063 const struct iwl_channel_info *ch_info;
2064 struct ieee80211_conf *conf = &hw->conf;
2065 struct ieee80211_channel *channel = conf->channel;
2066 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2067 struct iwl_rxon_context *ctx;
2068 unsigned long flags = 0;
2069 int ret = 0;
2070 u16 ch;
2071 int scan_active = 0;
2072 bool ht_changed[NUM_IWL_RXON_CTX] = {};
2073
2074 if (WARN_ON(!priv->cfg->ops->legacy))
2075 return -EOPNOTSUPP;
2076
2077 mutex_lock(&priv->mutex);
2078
2079 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2080 channel->hw_value, changed);
2081
2082 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2083 scan_active = 1;
2084 IWL_DEBUG_MAC80211(priv, "scan active\n");
2085 }
2086
2087 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2088 IEEE80211_CONF_CHANGE_CHANNEL)) {
2089 /* mac80211 uses static for non-HT which is what we want */
2090 priv->current_ht_config.smps = conf->smps_mode;
2091
2092 /*
2093 * Recalculate chain counts.
2094 *
2095 * If monitor mode is enabled then mac80211 will
2096 * set up the SM PS mode to OFF if an HT channel is
2097 * configured.
2098 */
2099 if (priv->cfg->ops->hcmd->set_rxon_chain)
2100 for_each_context(priv, ctx)
2101 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2102 }
2103
2104 /* during scanning mac80211 will delay channel setting until
2105 * scan finish with changed = 0
2106 */
2107 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2108 if (scan_active)
2109 goto set_ch_out;
2110
2111 ch = channel->hw_value;
2112 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2113 if (!iwl_legacy_is_channel_valid(ch_info)) {
2114 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2115 ret = -EINVAL;
2116 goto set_ch_out;
2117 }
2118
2119 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2120 !iwl_legacy_is_channel_ibss(ch_info)) {
2121 IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2122 ret = -EINVAL;
2123 goto set_ch_out;
2124 }
2125
2126 spin_lock_irqsave(&priv->lock, flags);
2127
2128 for_each_context(priv, ctx) {
2129 /* Configure HT40 channels */
2130 if (ctx->ht.enabled != conf_is_ht(conf)) {
2131 ctx->ht.enabled = conf_is_ht(conf);
2132 ht_changed[ctx->ctxid] = true;
2133 }
2134 if (ctx->ht.enabled) {
2135 if (conf_is_ht40_minus(conf)) {
2136 ctx->ht.extension_chan_offset =
2137 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2138 ctx->ht.is_40mhz = true;
2139 } else if (conf_is_ht40_plus(conf)) {
2140 ctx->ht.extension_chan_offset =
2141 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2142 ctx->ht.is_40mhz = true;
2143 } else {
2144 ctx->ht.extension_chan_offset =
2145 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2146 ctx->ht.is_40mhz = false;
2147 }
2148 } else
2149 ctx->ht.is_40mhz = false;
2150
2151 /*
2152 * Default to no protection. Protection mode will
2153 * later be set from BSS config in iwl_ht_conf
2154 */
2155 ctx->ht.protection =
2156 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2157
2158 /* if we are switching from ht to 2.4 clear flags
2159 * from any ht related info since 2.4 does not
2160 * support ht */
2161 if ((le16_to_cpu(ctx->staging.channel) != ch))
2162 ctx->staging.flags = 0;
2163
2164 iwl_legacy_set_rxon_channel(priv, channel, ctx);
2165 iwl_legacy_set_rxon_ht(priv, ht_conf);
2166
2167 iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2168 ctx->vif);
2169 }
2170
2171 spin_unlock_irqrestore(&priv->lock, flags);
2172
2173 if (priv->cfg->ops->legacy->update_bcast_stations)
2174 ret =
2175 priv->cfg->ops->legacy->update_bcast_stations(priv);
2176
2177 set_ch_out:
2178 /* The list of supported rates and rate mask can be different
2179 * for each band; since the band may have changed, reset
2180 * the rate mask to what mac80211 lists */
2181 iwl_legacy_set_rate(priv);
2182 }
2183
2184 if (changed & (IEEE80211_CONF_CHANGE_PS |
2185 IEEE80211_CONF_CHANGE_IDLE)) {
2186 ret = iwl_legacy_power_update_mode(priv, false);
2187 if (ret)
2188 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2189 }
2190
2191 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2192 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2193 priv->tx_power_user_lmt, conf->power_level);
2194
2195 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2196 }
2197
2198 if (!iwl_legacy_is_ready(priv)) {
2199 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2200 goto out;
2201 }
2202
2203 if (scan_active)
2204 goto out;
2205
2206 for_each_context(priv, ctx) {
2207 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2208 iwl_legacy_commit_rxon(priv, ctx);
2209 else
2210 IWL_DEBUG_INFO(priv,
2211 "Not re-sending same RXON configuration.\n");
2212 if (ht_changed[ctx->ctxid])
2213 iwl_legacy_update_qos(priv, ctx);
2214 }
2215
2216 out:
2217 IWL_DEBUG_MAC80211(priv, "leave\n");
2218 mutex_unlock(&priv->mutex);
2219 return ret;
2220 }
2221 EXPORT_SYMBOL(iwl_legacy_mac_config);
2222
2223 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2224 {
2225 struct iwl_priv *priv = hw->priv;
2226 unsigned long flags;
2227 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2228 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2229
2230 if (WARN_ON(!priv->cfg->ops->legacy))
2231 return;
2232
2233 mutex_lock(&priv->mutex);
2234 IWL_DEBUG_MAC80211(priv, "enter\n");
2235
2236 spin_lock_irqsave(&priv->lock, flags);
2237 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2238 spin_unlock_irqrestore(&priv->lock, flags);
2239
2240 spin_lock_irqsave(&priv->lock, flags);
2241
2242 /* new association get rid of ibss beacon skb */
2243 if (priv->beacon_skb)
2244 dev_kfree_skb(priv->beacon_skb);
2245
2246 priv->beacon_skb = NULL;
2247
2248 priv->timestamp = 0;
2249
2250 spin_unlock_irqrestore(&priv->lock, flags);
2251
2252 iwl_legacy_scan_cancel_timeout(priv, 100);
2253 if (!iwl_legacy_is_ready_rf(priv)) {
2254 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2255 mutex_unlock(&priv->mutex);
2256 return;
2257 }
2258
2259 /* we are restarting association process
2260 * clear RXON_FILTER_ASSOC_MSK bit
2261 */
2262 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2263 iwl_legacy_commit_rxon(priv, ctx);
2264
2265 iwl_legacy_set_rate(priv);
2266
2267 mutex_unlock(&priv->mutex);
2268
2269 IWL_DEBUG_MAC80211(priv, "leave\n");
2270 }
2271 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2272
2273 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2274 struct ieee80211_vif *vif)
2275 {
2276 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2277 struct ieee80211_sta *sta;
2278 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2279 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2280
2281 IWL_DEBUG_ASSOC(priv, "enter:\n");
2282
2283 if (!ctx->ht.enabled)
2284 return;
2285
2286 ctx->ht.protection =
2287 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2288 ctx->ht.non_gf_sta_present =
2289 !!(bss_conf->ht_operation_mode &
2290 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2291
2292 ht_conf->single_chain_sufficient = false;
2293
2294 switch (vif->type) {
2295 case NL80211_IFTYPE_STATION:
2296 rcu_read_lock();
2297 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2298 if (sta) {
2299 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2300 int maxstreams;
2301
2302 maxstreams = (ht_cap->mcs.tx_params &
2303 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2304 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2305 maxstreams += 1;
2306
2307 if ((ht_cap->mcs.rx_mask[1] == 0) &&
2308 (ht_cap->mcs.rx_mask[2] == 0))
2309 ht_conf->single_chain_sufficient = true;
2310 if (maxstreams <= 1)
2311 ht_conf->single_chain_sufficient = true;
2312 } else {
2313 /*
2314 * If at all, this can only happen through a race
2315 * when the AP disconnects us while we're still
2316 * setting up the connection, in that case mac80211
2317 * will soon tell us about that.
2318 */
2319 ht_conf->single_chain_sufficient = true;
2320 }
2321 rcu_read_unlock();
2322 break;
2323 case NL80211_IFTYPE_ADHOC:
2324 ht_conf->single_chain_sufficient = true;
2325 break;
2326 default:
2327 break;
2328 }
2329
2330 IWL_DEBUG_ASSOC(priv, "leave\n");
2331 }
2332
2333 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2334 struct ieee80211_vif *vif)
2335 {
2336 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2337
2338 /*
2339 * inform the ucode that there is no longer an
2340 * association and that no more packets should be
2341 * sent
2342 */
2343 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2344 ctx->staging.assoc_id = 0;
2345 iwl_legacy_commit_rxon(priv, ctx);
2346 }
2347
2348 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2349 struct ieee80211_vif *vif)
2350 {
2351 struct iwl_priv *priv = hw->priv;
2352 unsigned long flags;
2353 __le64 timestamp;
2354 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2355
2356 if (!skb)
2357 return;
2358
2359 IWL_DEBUG_MAC80211(priv, "enter\n");
2360
2361 lockdep_assert_held(&priv->mutex);
2362
2363 if (!priv->beacon_ctx) {
2364 IWL_ERR(priv, "update beacon but no beacon context!\n");
2365 dev_kfree_skb(skb);
2366 return;
2367 }
2368
2369 spin_lock_irqsave(&priv->lock, flags);
2370
2371 if (priv->beacon_skb)
2372 dev_kfree_skb(priv->beacon_skb);
2373
2374 priv->beacon_skb = skb;
2375
2376 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2377 priv->timestamp = le64_to_cpu(timestamp);
2378
2379 IWL_DEBUG_MAC80211(priv, "leave\n");
2380 spin_unlock_irqrestore(&priv->lock, flags);
2381
2382 if (!iwl_legacy_is_ready_rf(priv)) {
2383 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2384 return;
2385 }
2386
2387 priv->cfg->ops->legacy->post_associate(priv);
2388 }
2389
2390 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2391 struct ieee80211_vif *vif,
2392 struct ieee80211_bss_conf *bss_conf,
2393 u32 changes)
2394 {
2395 struct iwl_priv *priv = hw->priv;
2396 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2397 int ret;
2398
2399 if (WARN_ON(!priv->cfg->ops->legacy))
2400 return;
2401
2402 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2403
2404 mutex_lock(&priv->mutex);
2405
2406 if (!iwl_legacy_is_alive(priv)) {
2407 mutex_unlock(&priv->mutex);
2408 return;
2409 }
2410
2411 if (changes & BSS_CHANGED_QOS) {
2412 unsigned long flags;
2413
2414 spin_lock_irqsave(&priv->lock, flags);
2415 ctx->qos_data.qos_active = bss_conf->qos;
2416 iwl_legacy_update_qos(priv, ctx);
2417 spin_unlock_irqrestore(&priv->lock, flags);
2418 }
2419
2420 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2421 /*
2422 * the add_interface code must make sure we only ever
2423 * have a single interface that could be beaconing at
2424 * any time.
2425 */
2426 if (vif->bss_conf.enable_beacon)
2427 priv->beacon_ctx = ctx;
2428 else
2429 priv->beacon_ctx = NULL;
2430 }
2431
2432 if (changes & BSS_CHANGED_BSSID) {
2433 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2434
2435 /*
2436 * If there is currently a HW scan going on in the
2437 * background then we need to cancel it else the RXON
2438 * below/in post_associate will fail.
2439 */
2440 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2441 IWL_WARN(priv,
2442 "Aborted scan still in progress after 100ms\n");
2443 IWL_DEBUG_MAC80211(priv,
2444 "leaving - scan abort failed.\n");
2445 mutex_unlock(&priv->mutex);
2446 return;
2447 }
2448
2449 /* mac80211 only sets assoc when in STATION mode */
2450 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2451 memcpy(ctx->staging.bssid_addr,
2452 bss_conf->bssid, ETH_ALEN);
2453
2454 /* currently needed in a few places */
2455 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2456 } else {
2457 ctx->staging.filter_flags &=
2458 ~RXON_FILTER_ASSOC_MSK;
2459 }
2460
2461 }
2462
2463 /*
2464 * This needs to be after setting the BSSID in case
2465 * mac80211 decides to do both changes at once because
2466 * it will invoke post_associate.
2467 */
2468 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2469 iwl_legacy_beacon_update(hw, vif);
2470
2471 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2472 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2473 bss_conf->use_short_preamble);
2474 if (bss_conf->use_short_preamble)
2475 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2476 else
2477 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2478 }
2479
2480 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2481 IWL_DEBUG_MAC80211(priv,
2482 "ERP_CTS %d\n", bss_conf->use_cts_prot);
2483 if (bss_conf->use_cts_prot &&
2484 (priv->band != IEEE80211_BAND_5GHZ))
2485 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2486 else
2487 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2488 if (bss_conf->use_cts_prot)
2489 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2490 else
2491 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2492 }
2493
2494 if (changes & BSS_CHANGED_BASIC_RATES) {
2495 /* XXX use this information
2496 *
2497 * To do that, remove code from iwl_legacy_set_rate() and put something
2498 * like this here:
2499 *
2500 if (A-band)
2501 ctx->staging.ofdm_basic_rates =
2502 bss_conf->basic_rates;
2503 else
2504 ctx->staging.ofdm_basic_rates =
2505 bss_conf->basic_rates >> 4;
2506 ctx->staging.cck_basic_rates =
2507 bss_conf->basic_rates & 0xF;
2508 */
2509 }
2510
2511 if (changes & BSS_CHANGED_HT) {
2512 iwl_legacy_ht_conf(priv, vif);
2513
2514 if (priv->cfg->ops->hcmd->set_rxon_chain)
2515 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2516 }
2517
2518 if (changes & BSS_CHANGED_ASSOC) {
2519 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2520 if (bss_conf->assoc) {
2521 priv->timestamp = bss_conf->timestamp;
2522
2523 if (!iwl_legacy_is_rfkill(priv))
2524 priv->cfg->ops->legacy->post_associate(priv);
2525 } else
2526 iwl_legacy_set_no_assoc(priv, vif);
2527 }
2528
2529 if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2530 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2531 changes);
2532 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2533 if (!ret) {
2534 /* Sync active_rxon with latest change. */
2535 memcpy((void *)&ctx->active,
2536 &ctx->staging,
2537 sizeof(struct iwl_legacy_rxon_cmd));
2538 }
2539 }
2540
2541 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2542 if (vif->bss_conf.enable_beacon) {
2543 memcpy(ctx->staging.bssid_addr,
2544 bss_conf->bssid, ETH_ALEN);
2545 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2546 priv->cfg->ops->legacy->config_ap(priv);
2547 } else
2548 iwl_legacy_set_no_assoc(priv, vif);
2549 }
2550
2551 if (changes & BSS_CHANGED_IBSS) {
2552 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2553 bss_conf->ibss_joined);
2554 if (ret)
2555 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2556 bss_conf->ibss_joined ? "add" : "remove",
2557 bss_conf->bssid);
2558 }
2559
2560 mutex_unlock(&priv->mutex);
2561
2562 IWL_DEBUG_MAC80211(priv, "leave\n");
2563 }
2564 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2565
2566 irqreturn_t iwl_legacy_isr(int irq, void *data)
2567 {
2568 struct iwl_priv *priv = data;
2569 u32 inta, inta_mask;
2570 u32 inta_fh;
2571 unsigned long flags;
2572 if (!priv)
2573 return IRQ_NONE;
2574
2575 spin_lock_irqsave(&priv->lock, flags);
2576
2577 /* Disable (but don't clear!) interrupts here to avoid
2578 * back-to-back ISRs and sporadic interrupts from our NIC.
2579 * If we have something to service, the tasklet will re-enable ints.
2580 * If we *don't* have something, we'll re-enable before leaving here. */
2581 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
2582 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2583
2584 /* Discover which interrupts are active/pending */
2585 inta = iwl_read32(priv, CSR_INT);
2586 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2587
2588 /* Ignore interrupt if there's nothing in NIC to service.
2589 * This may be due to IRQ shared with another device,
2590 * or due to sporadic interrupts thrown from our NIC. */
2591 if (!inta && !inta_fh) {
2592 IWL_DEBUG_ISR(priv,
2593 "Ignore interrupt, inta == 0, inta_fh == 0\n");
2594 goto none;
2595 }
2596
2597 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2598 /* Hardware disappeared. It might have already raised
2599 * an interrupt */
2600 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2601 goto unplugged;
2602 }
2603
2604 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2605 inta, inta_mask, inta_fh);
2606
2607 inta &= ~CSR_INT_BIT_SCD;
2608
2609 /* iwl_irq_tasklet() will service interrupts and re-enable them */
2610 if (likely(inta || inta_fh))
2611 tasklet_schedule(&priv->irq_tasklet);
2612
2613 unplugged:
2614 spin_unlock_irqrestore(&priv->lock, flags);
2615 return IRQ_HANDLED;
2616
2617 none:
2618 /* re-enable interrupts here since we don't have anything to service. */
2619 /* only Re-enable if disabled by irq */
2620 if (test_bit(STATUS_INT_ENABLED, &priv->status))
2621 iwl_legacy_enable_interrupts(priv);
2622 spin_unlock_irqrestore(&priv->lock, flags);
2623 return IRQ_NONE;
2624 }
2625 EXPORT_SYMBOL(iwl_legacy_isr);
2626
2627 /*
2628 * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2629 * function.
2630 */
2631 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2632 struct ieee80211_tx_info *info,
2633 __le16 fc, __le32 *tx_flags)
2634 {
2635 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2636 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2637 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2638 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2639
2640 if (!ieee80211_is_mgmt(fc))
2641 return;
2642
2643 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2644 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2645 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2646 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2647 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2648 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2649 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2650 break;
2651 }
2652 } else if (info->control.rates[0].flags &
2653 IEEE80211_TX_RC_USE_CTS_PROTECT) {
2654 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2655 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2656 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2657 }
2658 }
2659 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);
linux-next