1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2012 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-debug.h"
38 #include "iwl-core.h"
39 #include "iwl-io.h"
40 #include "iwl-power.h"
41 #include "iwl-shared.h"
42 #include "iwl-agn.h"
43 #include "iwl-trans.h"
44
45 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
46
47 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
48 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
iwl_init_ht_hw_capab(const struct iwl_priv * priv,struct ieee80211_sta_ht_cap * ht_info,enum ieee80211_band band)49 static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
50 struct ieee80211_sta_ht_cap *ht_info,
51 enum ieee80211_band band)
52 {
53 u16 max_bit_rate = 0;
54 u8 rx_chains_num = hw_params(priv).rx_chains_num;
55 u8 tx_chains_num = hw_params(priv).tx_chains_num;
56
57 ht_info->cap = 0;
58 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
59
60 ht_info->ht_supported = true;
61
62 if (cfg(priv)->ht_params &&
63 cfg(priv)->ht_params->ht_greenfield_support)
64 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
65 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
66 max_bit_rate = MAX_BIT_RATE_20_MHZ;
67 if (hw_params(priv).ht40_channel & BIT(band)) {
68 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
69 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
70 ht_info->mcs.rx_mask[4] = 0x01;
71 max_bit_rate = MAX_BIT_RATE_40_MHZ;
72 }
73
74 if (iwlagn_mod_params.amsdu_size_8K)
75 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
76
77 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
78 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
79
80 ht_info->mcs.rx_mask[0] = 0xFF;
81 if (rx_chains_num >= 2)
82 ht_info->mcs.rx_mask[1] = 0xFF;
83 if (rx_chains_num >= 3)
84 ht_info->mcs.rx_mask[2] = 0xFF;
85
86 /* Highest supported Rx data rate */
87 max_bit_rate *= rx_chains_num;
88 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
89 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
90
91 /* Tx MCS capabilities */
92 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
93 if (tx_chains_num != rx_chains_num) {
94 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
95 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
96 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
97 }
98 }
99
100 /**
101 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
102 */
iwl_init_geos(struct iwl_priv * priv)103 int iwl_init_geos(struct iwl_priv *priv)
104 {
105 struct iwl_channel_info *ch;
106 struct ieee80211_supported_band *sband;
107 struct ieee80211_channel *channels;
108 struct ieee80211_channel *geo_ch;
109 struct ieee80211_rate *rates;
110 int i = 0;
111 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
112
113 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
114 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
115 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
116 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
117 return 0;
118 }
119
120 channels = kcalloc(priv->channel_count,
121 sizeof(struct ieee80211_channel), GFP_KERNEL);
122 if (!channels)
123 return -ENOMEM;
124
125 rates = kcalloc(IWL_RATE_COUNT_LEGACY, sizeof(struct ieee80211_rate),
126 GFP_KERNEL);
127 if (!rates) {
128 kfree(channels);
129 return -ENOMEM;
130 }
131
132 /* 5.2GHz channels start after the 2.4GHz channels */
133 sband = &priv->bands[IEEE80211_BAND_5GHZ];
134 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
135 /* just OFDM */
136 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
137 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
138
139 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
140 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
141 IEEE80211_BAND_5GHZ);
142
143 sband = &priv->bands[IEEE80211_BAND_2GHZ];
144 sband->channels = channels;
145 /* OFDM & CCK */
146 sband->bitrates = rates;
147 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
148
149 if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
150 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
151 IEEE80211_BAND_2GHZ);
152
153 priv->ieee_channels = channels;
154 priv->ieee_rates = rates;
155
156 for (i = 0; i < priv->channel_count; i++) {
157 ch = &priv->channel_info[i];
158
159 /* FIXME: might be removed if scan is OK */
160 if (!is_channel_valid(ch))
161 continue;
162
163 sband = &priv->bands[ch->band];
164
165 geo_ch = &sband->channels[sband->n_channels++];
166
167 geo_ch->center_freq =
168 ieee80211_channel_to_frequency(ch->channel, ch->band);
169 geo_ch->max_power = ch->max_power_avg;
170 geo_ch->max_antenna_gain = 0xff;
171 geo_ch->hw_value = ch->channel;
172
173 if (is_channel_valid(ch)) {
174 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
175 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
176
177 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
178 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
179
180 if (ch->flags & EEPROM_CHANNEL_RADAR)
181 geo_ch->flags |= IEEE80211_CHAN_RADAR;
182
183 geo_ch->flags |= ch->ht40_extension_channel;
184
185 if (ch->max_power_avg > max_tx_power)
186 max_tx_power = ch->max_power_avg;
187 } else {
188 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
189 }
190
191 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
192 ch->channel, geo_ch->center_freq,
193 is_channel_a_band(ch) ? "5.2" : "2.4",
194 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
195 "restricted" : "valid",
196 geo_ch->flags);
197 }
198
199 priv->tx_power_device_lmt = max_tx_power;
200 priv->tx_power_user_lmt = max_tx_power;
201 priv->tx_power_next = max_tx_power;
202
203 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
204 hw_params(priv).sku & EEPROM_SKU_CAP_BAND_52GHZ) {
205 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
206 "Please send your %s to maintainer.\n",
207 trans(priv)->hw_id_str);
208 hw_params(priv).sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
209 }
210
211 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
212 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
213 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
214
215 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
216
217 return 0;
218 }
219
220 /*
221 * iwl_free_geos - undo allocations in iwl_init_geos
222 */
iwl_free_geos(struct iwl_priv * priv)223 void iwl_free_geos(struct iwl_priv *priv)
224 {
225 kfree(priv->ieee_channels);
226 kfree(priv->ieee_rates);
227 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
228 }
229
iwl_is_channel_extension(struct iwl_priv * priv,enum ieee80211_band band,u16 channel,u8 extension_chan_offset)230 static bool iwl_is_channel_extension(struct iwl_priv *priv,
231 enum ieee80211_band band,
232 u16 channel, u8 extension_chan_offset)
233 {
234 const struct iwl_channel_info *ch_info;
235
236 ch_info = iwl_get_channel_info(priv, band, channel);
237 if (!is_channel_valid(ch_info))
238 return false;
239
240 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
241 return !(ch_info->ht40_extension_channel &
242 IEEE80211_CHAN_NO_HT40PLUS);
243 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
244 return !(ch_info->ht40_extension_channel &
245 IEEE80211_CHAN_NO_HT40MINUS);
246
247 return false;
248 }
249
iwl_is_ht40_tx_allowed(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta_ht_cap * ht_cap)250 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
251 struct iwl_rxon_context *ctx,
252 struct ieee80211_sta_ht_cap *ht_cap)
253 {
254 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
255 return false;
256
257 /*
258 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
259 * the bit will not set if it is pure 40MHz case
260 */
261 if (ht_cap && !ht_cap->ht_supported)
262 return false;
263
264 #ifdef CONFIG_IWLWIFI_DEBUGFS
265 if (priv->disable_ht40)
266 return false;
267 #endif
268
269 return iwl_is_channel_extension(priv, priv->band,
270 le16_to_cpu(ctx->staging.channel),
271 ctx->ht.extension_chan_offset);
272 }
273
iwl_adjust_beacon_interval(u16 beacon_val,u16 max_beacon_val)274 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
275 {
276 u16 new_val;
277 u16 beacon_factor;
278
279 /*
280 * If mac80211 hasn't given us a beacon interval, program
281 * the default into the device (not checking this here
282 * would cause the adjustment below to return the maximum
283 * value, which may break PAN.)
284 */
285 if (!beacon_val)
286 return DEFAULT_BEACON_INTERVAL;
287
288 /*
289 * If the beacon interval we obtained from the peer
290 * is too large, we'll have to wake up more often
291 * (and in IBSS case, we'll beacon too much)
292 *
293 * For example, if max_beacon_val is 4096, and the
294 * requested beacon interval is 7000, we'll have to
295 * use 3500 to be able to wake up on the beacons.
296 *
297 * This could badly influence beacon detection stats.
298 */
299
300 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
301 new_val = beacon_val / beacon_factor;
302
303 if (!new_val)
304 new_val = max_beacon_val;
305
306 return new_val;
307 }
308
iwl_send_rxon_timing(struct iwl_priv * priv,struct iwl_rxon_context * ctx)309 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
310 {
311 u64 tsf;
312 s32 interval_tm, rem;
313 struct ieee80211_conf *conf = NULL;
314 u16 beacon_int;
315 struct ieee80211_vif *vif = ctx->vif;
316
317 conf = &priv->hw->conf;
318
319 lockdep_assert_held(&priv->mutex);
320
321 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
322
323 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
324 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
325
326 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
327
328 /*
329 * TODO: For IBSS we need to get atim_window from mac80211,
330 * for now just always use 0
331 */
332 ctx->timing.atim_window = 0;
333
334 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
335 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
336 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
337 priv->contexts[IWL_RXON_CTX_BSS].vif &&
338 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
339 ctx->timing.beacon_interval =
340 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
341 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
342 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
343 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
344 priv->contexts[IWL_RXON_CTX_PAN].vif &&
345 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
346 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
347 !ctx->vif->bss_conf.beacon_int)) {
348 ctx->timing.beacon_interval =
349 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
350 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
351 } else {
352 beacon_int = iwl_adjust_beacon_interval(beacon_int,
353 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
354 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
355 }
356
357 ctx->beacon_int = beacon_int;
358
359 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
360 interval_tm = beacon_int * TIME_UNIT;
361 rem = do_div(tsf, interval_tm);
362 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
363
364 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
365
366 IWL_DEBUG_ASSOC(priv,
367 "beacon interval %d beacon timer %d beacon tim %d\n",
368 le16_to_cpu(ctx->timing.beacon_interval),
369 le32_to_cpu(ctx->timing.beacon_init_val),
370 le16_to_cpu(ctx->timing.atim_window));
371
372 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
373 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
374 }
375
iwl_set_rxon_hwcrypto(struct iwl_priv * priv,struct iwl_rxon_context * ctx,int hw_decrypt)376 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
377 int hw_decrypt)
378 {
379 struct iwl_rxon_cmd *rxon = &ctx->staging;
380
381 if (hw_decrypt)
382 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
383 else
384 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
385
386 }
387
388 /* validate RXON structure is valid */
iwl_check_rxon_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx)389 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
390 {
391 struct iwl_rxon_cmd *rxon = &ctx->staging;
392 u32 errors = 0;
393
394 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
395 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
396 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
397 errors |= BIT(0);
398 }
399 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
400 IWL_WARN(priv, "check 2.4G: wrong radar\n");
401 errors |= BIT(1);
402 }
403 } else {
404 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
405 IWL_WARN(priv, "check 5.2G: not short slot!\n");
406 errors |= BIT(2);
407 }
408 if (rxon->flags & RXON_FLG_CCK_MSK) {
409 IWL_WARN(priv, "check 5.2G: CCK!\n");
410 errors |= BIT(3);
411 }
412 }
413 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
414 IWL_WARN(priv, "mac/bssid mcast!\n");
415 errors |= BIT(4);
416 }
417
418 /* make sure basic rates 6Mbps and 1Mbps are supported */
419 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
420 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
421 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
422 errors |= BIT(5);
423 }
424
425 if (le16_to_cpu(rxon->assoc_id) > 2007) {
426 IWL_WARN(priv, "aid > 2007\n");
427 errors |= BIT(6);
428 }
429
430 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
431 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
432 IWL_WARN(priv, "CCK and short slot\n");
433 errors |= BIT(7);
434 }
435
436 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
437 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
438 IWL_WARN(priv, "CCK and auto detect");
439 errors |= BIT(8);
440 }
441
442 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
443 RXON_FLG_TGG_PROTECT_MSK)) ==
444 RXON_FLG_TGG_PROTECT_MSK) {
445 IWL_WARN(priv, "TGg but no auto-detect\n");
446 errors |= BIT(9);
447 }
448
449 if (rxon->channel == 0) {
450 IWL_WARN(priv, "zero channel is invalid\n");
451 errors |= BIT(10);
452 }
453
454 WARN(errors, "Invalid RXON (%#x), channel %d",
455 errors, le16_to_cpu(rxon->channel));
456
457 return errors ? -EINVAL : 0;
458 }
459
460 /**
461 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
462 * @priv: staging_rxon is compared to active_rxon
463 *
464 * If the RXON structure is changing enough to require a new tune,
465 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
466 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
467 */
iwl_full_rxon_required(struct iwl_priv * priv,struct iwl_rxon_context * ctx)468 int iwl_full_rxon_required(struct iwl_priv *priv,
469 struct iwl_rxon_context *ctx)
470 {
471 const struct iwl_rxon_cmd *staging = &ctx->staging;
472 const struct iwl_rxon_cmd *active = &ctx->active;
473
474 #define CHK(cond) \
475 if ((cond)) { \
476 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
477 return 1; \
478 }
479
480 #define CHK_NEQ(c1, c2) \
481 if ((c1) != (c2)) { \
482 IWL_DEBUG_INFO(priv, "need full RXON - " \
483 #c1 " != " #c2 " - %d != %d\n", \
484 (c1), (c2)); \
485 return 1; \
486 }
487
488 /* These items are only settable from the full RXON command */
489 CHK(!iwl_is_associated_ctx(ctx));
490 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
491 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
492 CHK(compare_ether_addr(staging->wlap_bssid_addr,
493 active->wlap_bssid_addr));
494 CHK_NEQ(staging->dev_type, active->dev_type);
495 CHK_NEQ(staging->channel, active->channel);
496 CHK_NEQ(staging->air_propagation, active->air_propagation);
497 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
498 active->ofdm_ht_single_stream_basic_rates);
499 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
500 active->ofdm_ht_dual_stream_basic_rates);
501 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
502 active->ofdm_ht_triple_stream_basic_rates);
503 CHK_NEQ(staging->assoc_id, active->assoc_id);
504
505 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
506 * be updated with the RXON_ASSOC command -- however only some
507 * flag transitions are allowed using RXON_ASSOC */
508
509 /* Check if we are not switching bands */
510 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
511 active->flags & RXON_FLG_BAND_24G_MSK);
512
513 /* Check if we are switching association toggle */
514 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
515 active->filter_flags & RXON_FILTER_ASSOC_MSK);
516
517 #undef CHK
518 #undef CHK_NEQ
519
520 return 0;
521 }
522
_iwl_set_rxon_ht(struct iwl_priv * priv,struct iwl_ht_config * ht_conf,struct iwl_rxon_context * ctx)523 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
524 struct iwl_ht_config *ht_conf,
525 struct iwl_rxon_context *ctx)
526 {
527 struct iwl_rxon_cmd *rxon = &ctx->staging;
528
529 if (!ctx->ht.enabled) {
530 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
531 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
532 RXON_FLG_HT40_PROT_MSK |
533 RXON_FLG_HT_PROT_MSK);
534 return;
535 }
536
537 /* FIXME: if the definition of ht.protection changed, the "translation"
538 * will be needed for rxon->flags
539 */
540 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
541
542 /* Set up channel bandwidth:
543 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
544 /* clear the HT channel mode before set the mode */
545 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
546 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
547 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
548 /* pure ht40 */
549 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
550 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
551 /* Note: control channel is opposite of extension channel */
552 switch (ctx->ht.extension_chan_offset) {
553 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
554 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
558 break;
559 }
560 } else {
561 /* Note: control channel is opposite of extension channel */
562 switch (ctx->ht.extension_chan_offset) {
563 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
564 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
565 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
566 break;
567 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
568 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
569 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
570 break;
571 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
572 default:
573 /* channel location only valid if in Mixed mode */
574 IWL_ERR(priv, "invalid extension channel offset\n");
575 break;
576 }
577 }
578 } else {
579 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
580 }
581
582 iwlagn_set_rxon_chain(priv, ctx);
583
584 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
585 "extension channel offset 0x%x\n",
586 le32_to_cpu(rxon->flags), ctx->ht.protection,
587 ctx->ht.extension_chan_offset);
588 }
589
iwl_set_rxon_ht(struct iwl_priv * priv,struct iwl_ht_config * ht_conf)590 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
591 {
592 struct iwl_rxon_context *ctx;
593
594 for_each_context(priv, ctx)
595 _iwl_set_rxon_ht(priv, ht_conf, ctx);
596 }
597
598 /* Return valid, unused, channel for a passive scan to reset the RF */
iwl_get_single_channel_number(struct iwl_priv * priv,enum ieee80211_band band)599 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
600 enum ieee80211_band band)
601 {
602 const struct iwl_channel_info *ch_info;
603 int i;
604 u8 channel = 0;
605 u8 min, max;
606 struct iwl_rxon_context *ctx;
607
608 if (band == IEEE80211_BAND_5GHZ) {
609 min = 14;
610 max = priv->channel_count;
611 } else {
612 min = 0;
613 max = 14;
614 }
615
616 for (i = min; i < max; i++) {
617 bool busy = false;
618
619 for_each_context(priv, ctx) {
620 busy = priv->channel_info[i].channel ==
621 le16_to_cpu(ctx->staging.channel);
622 if (busy)
623 break;
624 }
625
626 if (busy)
627 continue;
628
629 channel = priv->channel_info[i].channel;
630 ch_info = iwl_get_channel_info(priv, band, channel);
631 if (is_channel_valid(ch_info))
632 break;
633 }
634
635 return channel;
636 }
637
638 /**
639 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
640 * @ch: requested channel as a pointer to struct ieee80211_channel
641
642 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
643 * in the staging RXON flag structure based on the ch->band
644 */
iwl_set_rxon_channel(struct iwl_priv * priv,struct ieee80211_channel * ch,struct iwl_rxon_context * ctx)645 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
646 struct iwl_rxon_context *ctx)
647 {
648 enum ieee80211_band band = ch->band;
649 u16 channel = ch->hw_value;
650
651 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
652 (priv->band == band))
653 return;
654
655 ctx->staging.channel = cpu_to_le16(channel);
656 if (band == IEEE80211_BAND_5GHZ)
657 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
658 else
659 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
660
661 priv->band = band;
662
663 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
664
665 }
666
iwl_set_flags_for_band(struct iwl_priv * priv,struct iwl_rxon_context * ctx,enum ieee80211_band band,struct ieee80211_vif * vif)667 void iwl_set_flags_for_band(struct iwl_priv *priv,
668 struct iwl_rxon_context *ctx,
669 enum ieee80211_band band,
670 struct ieee80211_vif *vif)
671 {
672 if (band == IEEE80211_BAND_5GHZ) {
673 ctx->staging.flags &=
674 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
675 | RXON_FLG_CCK_MSK);
676 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
677 } else {
678 /* Copied from iwl_post_associate() */
679 if (vif && vif->bss_conf.use_short_slot)
680 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
681 else
682 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
683
684 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
685 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
686 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
687 }
688 }
689
690 /*
691 * initialize rxon structure with default values from eeprom
692 */
iwl_connection_init_rx_config(struct iwl_priv * priv,struct iwl_rxon_context * ctx)693 void iwl_connection_init_rx_config(struct iwl_priv *priv,
694 struct iwl_rxon_context *ctx)
695 {
696 const struct iwl_channel_info *ch_info;
697
698 memset(&ctx->staging, 0, sizeof(ctx->staging));
699
700 if (!ctx->vif) {
701 ctx->staging.dev_type = ctx->unused_devtype;
702 } else switch (ctx->vif->type) {
703 case NL80211_IFTYPE_AP:
704 ctx->staging.dev_type = ctx->ap_devtype;
705 break;
706
707 case NL80211_IFTYPE_STATION:
708 ctx->staging.dev_type = ctx->station_devtype;
709 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
710 break;
711
712 case NL80211_IFTYPE_ADHOC:
713 ctx->staging.dev_type = ctx->ibss_devtype;
714 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
715 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
716 RXON_FILTER_ACCEPT_GRP_MSK;
717 break;
718
719 default:
720 IWL_ERR(priv, "Unsupported interface type %d\n",
721 ctx->vif->type);
722 break;
723 }
724
725 #if 0
726 /* TODO: Figure out when short_preamble would be set and cache from
727 * that */
728 if (!hw_to_local(priv->hw)->short_preamble)
729 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
730 else
731 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
732 #endif
733
734 ch_info = iwl_get_channel_info(priv, priv->band,
735 le16_to_cpu(ctx->active.channel));
736
737 if (!ch_info)
738 ch_info = &priv->channel_info[0];
739
740 ctx->staging.channel = cpu_to_le16(ch_info->channel);
741 priv->band = ch_info->band;
742
743 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
744
745 ctx->staging.ofdm_basic_rates =
746 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
747 ctx->staging.cck_basic_rates =
748 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
749
750 /* clear both MIX and PURE40 mode flag */
751 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
752 RXON_FLG_CHANNEL_MODE_PURE_40);
753 if (ctx->vif)
754 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
755
756 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
757 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
758 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
759 }
760
iwl_set_rate(struct iwl_priv * priv)761 void iwl_set_rate(struct iwl_priv *priv)
762 {
763 const struct ieee80211_supported_band *hw = NULL;
764 struct ieee80211_rate *rate;
765 struct iwl_rxon_context *ctx;
766 int i;
767
768 hw = iwl_get_hw_mode(priv, priv->band);
769 if (!hw) {
770 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
771 return;
772 }
773
774 priv->active_rate = 0;
775
776 for (i = 0; i < hw->n_bitrates; i++) {
777 rate = &(hw->bitrates[i]);
778 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
779 priv->active_rate |= (1 << rate->hw_value);
780 }
781
782 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
783
784 for_each_context(priv, ctx) {
785 ctx->staging.cck_basic_rates =
786 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
787
788 ctx->staging.ofdm_basic_rates =
789 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
790 }
791 }
792
iwl_chswitch_done(struct iwl_priv * priv,bool is_success)793 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
794 {
795 /*
796 * MULTI-FIXME
797 * See iwlagn_mac_channel_switch.
798 */
799 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
800
801 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
802 return;
803
804 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
805 return;
806
807 if (ctx->vif)
808 ieee80211_chswitch_done(ctx->vif, is_success);
809 }
810
811 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_print_rx_config_cmd(struct iwl_priv * priv,enum iwl_rxon_context_id ctxid)812 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
813 enum iwl_rxon_context_id ctxid)
814 {
815 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
816 struct iwl_rxon_cmd *rxon = &ctx->staging;
817
818 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
819 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
820 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
821 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
822 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
823 le32_to_cpu(rxon->filter_flags));
824 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
825 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
826 rxon->ofdm_basic_rates);
827 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
828 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
829 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
830 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
831 }
832 #endif
833
iwlagn_fw_error(struct iwl_priv * priv,bool ondemand)834 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
835 {
836 unsigned int reload_msec;
837 unsigned long reload_jiffies;
838
839 #ifdef CONFIG_IWLWIFI_DEBUG
840 if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
841 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
842 #endif
843
844 /* uCode is no longer loaded. */
845 priv->ucode_loaded = false;
846
847 /* Set the FW error flag -- cleared on iwl_down */
848 set_bit(STATUS_FW_ERROR, &priv->shrd->status);
849
850 /* Cancel currently queued command. */
851 clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
852
853 iwl_abort_notification_waits(&priv->notif_wait);
854
855 /* Keep the restart process from trying to send host
856 * commands by clearing the ready bit */
857 clear_bit(STATUS_READY, &priv->status);
858
859 wake_up(&trans(priv)->wait_command_queue);
860
861 if (!ondemand) {
862 /*
863 * If firmware keep reloading, then it indicate something
864 * serious wrong and firmware having problem to recover
865 * from it. Instead of keep trying which will fill the syslog
866 * and hang the system, let's just stop it
867 */
868 reload_jiffies = jiffies;
869 reload_msec = jiffies_to_msecs((long) reload_jiffies -
870 (long) priv->reload_jiffies);
871 priv->reload_jiffies = reload_jiffies;
872 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
873 priv->reload_count++;
874 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
875 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
876 return;
877 }
878 } else
879 priv->reload_count = 0;
880 }
881
882 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
883 if (iwlagn_mod_params.restart_fw) {
884 IWL_DEBUG_FW_ERRORS(priv,
885 "Restarting adapter due to uCode error.\n");
886 queue_work(priv->workqueue, &priv->restart);
887 } else
888 IWL_DEBUG_FW_ERRORS(priv,
889 "Detected FW error, but not restarting\n");
890 }
891 }
892
iwl_set_tx_power(struct iwl_priv * priv,s8 tx_power,bool force)893 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
894 {
895 int ret;
896 s8 prev_tx_power;
897 bool defer;
898 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
899
900 lockdep_assert_held(&priv->mutex);
901
902 if (priv->tx_power_user_lmt == tx_power && !force)
903 return 0;
904
905 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
906 IWL_WARN(priv,
907 "Requested user TXPOWER %d below lower limit %d.\n",
908 tx_power,
909 IWLAGN_TX_POWER_TARGET_POWER_MIN);
910 return -EINVAL;
911 }
912
913 if (tx_power > priv->tx_power_device_lmt) {
914 IWL_WARN(priv,
915 "Requested user TXPOWER %d above upper limit %d.\n",
916 tx_power, priv->tx_power_device_lmt);
917 return -EINVAL;
918 }
919
920 if (!iwl_is_ready_rf(priv))
921 return -EIO;
922
923 /* scan complete and commit_rxon use tx_power_next value,
924 * it always need to be updated for newest request */
925 priv->tx_power_next = tx_power;
926
927 /* do not set tx power when scanning or channel changing */
928 defer = test_bit(STATUS_SCANNING, &priv->status) ||
929 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
930 if (defer && !force) {
931 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
932 return 0;
933 }
934
935 prev_tx_power = priv->tx_power_user_lmt;
936 priv->tx_power_user_lmt = tx_power;
937
938 ret = iwlagn_send_tx_power(priv);
939
940 /* if fail to set tx_power, restore the orig. tx power */
941 if (ret) {
942 priv->tx_power_user_lmt = prev_tx_power;
943 priv->tx_power_next = prev_tx_power;
944 }
945 return ret;
946 }
947
iwl_send_bt_config(struct iwl_priv * priv)948 void iwl_send_bt_config(struct iwl_priv *priv)
949 {
950 struct iwl_bt_cmd bt_cmd = {
951 .lead_time = BT_LEAD_TIME_DEF,
952 .max_kill = BT_MAX_KILL_DEF,
953 .kill_ack_mask = 0,
954 .kill_cts_mask = 0,
955 };
956
957 if (!iwlagn_mod_params.bt_coex_active)
958 bt_cmd.flags = BT_COEX_DISABLE;
959 else
960 bt_cmd.flags = BT_COEX_ENABLE;
961
962 priv->bt_enable_flag = bt_cmd.flags;
963 IWL_DEBUG_INFO(priv, "BT coex %s\n",
964 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
965
966 if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
967 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
968 IWL_ERR(priv, "failed to send BT Coex Config\n");
969 }
970
iwl_send_statistics_request(struct iwl_priv * priv,u8 flags,bool clear)971 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
972 {
973 struct iwl_statistics_cmd statistics_cmd = {
974 .configuration_flags =
975 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
976 };
977
978 if (flags & CMD_ASYNC)
979 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
980 CMD_ASYNC,
981 sizeof(struct iwl_statistics_cmd),
982 &statistics_cmd);
983 else
984 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
985 CMD_SYNC,
986 sizeof(struct iwl_statistics_cmd),
987 &statistics_cmd);
988 }
989
990
991
992
993 #ifdef CONFIG_IWLWIFI_DEBUGFS
994
995 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
996
iwl_reset_traffic_log(struct iwl_priv * priv)997 void iwl_reset_traffic_log(struct iwl_priv *priv)
998 {
999 priv->tx_traffic_idx = 0;
1000 priv->rx_traffic_idx = 0;
1001 if (priv->tx_traffic)
1002 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1003 if (priv->rx_traffic)
1004 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1005 }
1006
iwl_alloc_traffic_mem(struct iwl_priv * priv)1007 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1008 {
1009 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1010
1011 if (iwl_have_debug_level(IWL_DL_TX)) {
1012 if (!priv->tx_traffic) {
1013 priv->tx_traffic =
1014 kzalloc(traffic_size, GFP_KERNEL);
1015 if (!priv->tx_traffic)
1016 return -ENOMEM;
1017 }
1018 }
1019 if (iwl_have_debug_level(IWL_DL_RX)) {
1020 if (!priv->rx_traffic) {
1021 priv->rx_traffic =
1022 kzalloc(traffic_size, GFP_KERNEL);
1023 if (!priv->rx_traffic)
1024 return -ENOMEM;
1025 }
1026 }
1027 iwl_reset_traffic_log(priv);
1028 return 0;
1029 }
1030
iwl_free_traffic_mem(struct iwl_priv * priv)1031 void iwl_free_traffic_mem(struct iwl_priv *priv)
1032 {
1033 kfree(priv->tx_traffic);
1034 priv->tx_traffic = NULL;
1035
1036 kfree(priv->rx_traffic);
1037 priv->rx_traffic = NULL;
1038 }
1039
iwl_dbg_log_tx_data_frame(struct iwl_priv * priv,u16 length,struct ieee80211_hdr * header)1040 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1041 u16 length, struct ieee80211_hdr *header)
1042 {
1043 __le16 fc;
1044 u16 len;
1045
1046 if (likely(!iwl_have_debug_level(IWL_DL_TX)))
1047 return;
1048
1049 if (!priv->tx_traffic)
1050 return;
1051
1052 fc = header->frame_control;
1053 if (ieee80211_is_data(fc)) {
1054 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1055 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1056 memcpy((priv->tx_traffic +
1057 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1058 header, len);
1059 priv->tx_traffic_idx =
1060 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1061 }
1062 }
1063
iwl_dbg_log_rx_data_frame(struct iwl_priv * priv,u16 length,struct ieee80211_hdr * header)1064 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1065 u16 length, struct ieee80211_hdr *header)
1066 {
1067 __le16 fc;
1068 u16 len;
1069
1070 if (likely(!iwl_have_debug_level(IWL_DL_RX)))
1071 return;
1072
1073 if (!priv->rx_traffic)
1074 return;
1075
1076 fc = header->frame_control;
1077 if (ieee80211_is_data(fc)) {
1078 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1079 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1080 memcpy((priv->rx_traffic +
1081 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1082 header, len);
1083 priv->rx_traffic_idx =
1084 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1085 }
1086 }
1087
get_mgmt_string(int cmd)1088 const char *get_mgmt_string(int cmd)
1089 {
1090 switch (cmd) {
1091 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1092 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1093 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1094 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1095 IWL_CMD(MANAGEMENT_PROBE_REQ);
1096 IWL_CMD(MANAGEMENT_PROBE_RESP);
1097 IWL_CMD(MANAGEMENT_BEACON);
1098 IWL_CMD(MANAGEMENT_ATIM);
1099 IWL_CMD(MANAGEMENT_DISASSOC);
1100 IWL_CMD(MANAGEMENT_AUTH);
1101 IWL_CMD(MANAGEMENT_DEAUTH);
1102 IWL_CMD(MANAGEMENT_ACTION);
1103 default:
1104 return "UNKNOWN";
1105
1106 }
1107 }
1108
get_ctrl_string(int cmd)1109 const char *get_ctrl_string(int cmd)
1110 {
1111 switch (cmd) {
1112 IWL_CMD(CONTROL_BACK_REQ);
1113 IWL_CMD(CONTROL_BACK);
1114 IWL_CMD(CONTROL_PSPOLL);
1115 IWL_CMD(CONTROL_RTS);
1116 IWL_CMD(CONTROL_CTS);
1117 IWL_CMD(CONTROL_ACK);
1118 IWL_CMD(CONTROL_CFEND);
1119 IWL_CMD(CONTROL_CFENDACK);
1120 default:
1121 return "UNKNOWN";
1122
1123 }
1124 }
1125
iwl_clear_traffic_stats(struct iwl_priv * priv)1126 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1127 {
1128 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1129 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1130 }
1131
1132 /*
1133 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1134 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1135 * Use debugFs to display the rx/rx_statistics
1136 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1137 * information will be recorded, but DATA pkt still will be recorded
1138 * for the reason of iwl_led.c need to control the led blinking based on
1139 * number of tx and rx data.
1140 *
1141 */
iwl_update_stats(struct iwl_priv * priv,bool is_tx,__le16 fc,u16 len)1142 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1143 {
1144 struct traffic_stats *stats;
1145
1146 if (is_tx)
1147 stats = &priv->tx_stats;
1148 else
1149 stats = &priv->rx_stats;
1150
1151 if (ieee80211_is_mgmt(fc)) {
1152 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1153 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1154 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1155 break;
1156 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1157 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1158 break;
1159 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1160 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1161 break;
1162 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1163 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1164 break;
1165 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1166 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1167 break;
1168 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1169 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1170 break;
1171 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1172 stats->mgmt[MANAGEMENT_BEACON]++;
1173 break;
1174 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1175 stats->mgmt[MANAGEMENT_ATIM]++;
1176 break;
1177 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1178 stats->mgmt[MANAGEMENT_DISASSOC]++;
1179 break;
1180 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1181 stats->mgmt[MANAGEMENT_AUTH]++;
1182 break;
1183 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1184 stats->mgmt[MANAGEMENT_DEAUTH]++;
1185 break;
1186 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1187 stats->mgmt[MANAGEMENT_ACTION]++;
1188 break;
1189 }
1190 } else if (ieee80211_is_ctl(fc)) {
1191 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1192 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1193 stats->ctrl[CONTROL_BACK_REQ]++;
1194 break;
1195 case cpu_to_le16(IEEE80211_STYPE_BACK):
1196 stats->ctrl[CONTROL_BACK]++;
1197 break;
1198 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1199 stats->ctrl[CONTROL_PSPOLL]++;
1200 break;
1201 case cpu_to_le16(IEEE80211_STYPE_RTS):
1202 stats->ctrl[CONTROL_RTS]++;
1203 break;
1204 case cpu_to_le16(IEEE80211_STYPE_CTS):
1205 stats->ctrl[CONTROL_CTS]++;
1206 break;
1207 case cpu_to_le16(IEEE80211_STYPE_ACK):
1208 stats->ctrl[CONTROL_ACK]++;
1209 break;
1210 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1211 stats->ctrl[CONTROL_CFEND]++;
1212 break;
1213 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1214 stats->ctrl[CONTROL_CFENDACK]++;
1215 break;
1216 }
1217 } else {
1218 /* data */
1219 stats->data_cnt++;
1220 stats->data_bytes += len;
1221 }
1222 }
1223 #endif
1224
iwl_force_rf_reset(struct iwl_priv * priv)1225 static void iwl_force_rf_reset(struct iwl_priv *priv)
1226 {
1227 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1228 return;
1229
1230 if (!iwl_is_any_associated(priv)) {
1231 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1232 return;
1233 }
1234 /*
1235 * There is no easy and better way to force reset the radio,
1236 * the only known method is switching channel which will force to
1237 * reset and tune the radio.
1238 * Use internal short scan (single channel) operation to should
1239 * achieve this objective.
1240 * Driver should reset the radio when number of consecutive missed
1241 * beacon, or any other uCode error condition detected.
1242 */
1243 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1244 iwl_internal_short_hw_scan(priv);
1245 }
1246
1247
iwl_force_reset(struct iwl_priv * priv,int mode,bool external)1248 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1249 {
1250 struct iwl_force_reset *force_reset;
1251
1252 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1253 return -EINVAL;
1254
1255 if (mode >= IWL_MAX_FORCE_RESET) {
1256 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1257 return -EINVAL;
1258 }
1259 force_reset = &priv->force_reset[mode];
1260 force_reset->reset_request_count++;
1261 if (!external) {
1262 if (force_reset->last_force_reset_jiffies &&
1263 time_after(force_reset->last_force_reset_jiffies +
1264 force_reset->reset_duration, jiffies)) {
1265 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1266 force_reset->reset_reject_count++;
1267 return -EAGAIN;
1268 }
1269 }
1270 force_reset->reset_success_count++;
1271 force_reset->last_force_reset_jiffies = jiffies;
1272 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1273 switch (mode) {
1274 case IWL_RF_RESET:
1275 iwl_force_rf_reset(priv);
1276 break;
1277 case IWL_FW_RESET:
1278 /*
1279 * if the request is from external(ex: debugfs),
1280 * then always perform the request in regardless the module
1281 * parameter setting
1282 * if the request is from internal (uCode error or driver
1283 * detect failure), then fw_restart module parameter
1284 * need to be check before performing firmware reload
1285 */
1286 if (!external && !iwlagn_mod_params.restart_fw) {
1287 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1288 "module parameter setting\n");
1289 break;
1290 }
1291 IWL_ERR(priv, "On demand firmware reload\n");
1292 iwlagn_fw_error(priv, true);
1293 break;
1294 }
1295 return 0;
1296 }
1297
1298
iwl_cmd_echo_test(struct iwl_priv * priv)1299 int iwl_cmd_echo_test(struct iwl_priv *priv)
1300 {
1301 int ret;
1302 struct iwl_host_cmd cmd = {
1303 .id = REPLY_ECHO,
1304 .len = { 0 },
1305 .flags = CMD_SYNC,
1306 };
1307
1308 ret = iwl_dvm_send_cmd(priv, &cmd);
1309 if (ret)
1310 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
1311 else
1312 IWL_DEBUG_INFO(priv, "echo testing pass\n");
1313 return ret;
1314 }
1315
iwl_check_stuck_queue(struct iwl_priv * priv,int txq)1316 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
1317 {
1318 if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
1319 int ret;
1320 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1321 return (ret == -EAGAIN) ? 0 : 1;
1322 }
1323 return 0;
1324 }
1325
1326 /*
1327 * Making watchdog tick be a quarter of timeout assure we will
1328 * discover the queue hung between timeout and 1.25*timeout
1329 */
1330 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1331
1332 /*
1333 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1334 * we reset the firmware. If everything is fine just rearm the timer.
1335 */
iwl_bg_watchdog(unsigned long data)1336 void iwl_bg_watchdog(unsigned long data)
1337 {
1338 struct iwl_priv *priv = (struct iwl_priv *)data;
1339 int cnt;
1340 unsigned long timeout;
1341
1342 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1343 return;
1344
1345 if (iwl_is_rfkill(priv))
1346 return;
1347
1348 timeout = hw_params(priv).wd_timeout;
1349 if (timeout == 0)
1350 return;
1351
1352 /* monitor and check for stuck queues */
1353 for (cnt = 0; cnt < cfg(priv)->base_params->num_of_queues; cnt++)
1354 if (iwl_check_stuck_queue(priv, cnt))
1355 return;
1356
1357 mod_timer(&priv->watchdog, jiffies +
1358 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1359 }
1360
iwl_setup_watchdog(struct iwl_priv * priv)1361 void iwl_setup_watchdog(struct iwl_priv *priv)
1362 {
1363 unsigned int timeout = hw_params(priv).wd_timeout;
1364
1365 if (!iwlagn_mod_params.wd_disable) {
1366 /* use system default */
1367 if (timeout && !cfg(priv)->base_params->wd_disable)
1368 mod_timer(&priv->watchdog,
1369 jiffies +
1370 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1371 else
1372 del_timer(&priv->watchdog);
1373 } else {
1374 /* module parameter overwrite default configuration */
1375 if (timeout && iwlagn_mod_params.wd_disable == 2)
1376 mod_timer(&priv->watchdog,
1377 jiffies +
1378 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1379 else
1380 del_timer(&priv->watchdog);
1381 }
1382 }
1383
1384 /**
1385 * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
1386 * @priv -- pointer to iwl_priv data structure
1387 * @tsf_bits -- number of bits need to shift for masking)
1388 */
iwl_beacon_time_mask_low(struct iwl_priv * priv,u16 tsf_bits)1389 static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
1390 u16 tsf_bits)
1391 {
1392 return (1 << tsf_bits) - 1;
1393 }
1394
1395 /**
1396 * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
1397 * @priv -- pointer to iwl_priv data structure
1398 * @tsf_bits -- number of bits need to shift for masking)
1399 */
iwl_beacon_time_mask_high(struct iwl_priv * priv,u16 tsf_bits)1400 static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
1401 u16 tsf_bits)
1402 {
1403 return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
1404 }
1405
1406 /*
1407 * extended beacon time format
1408 * time in usec will be changed into a 32-bit value in extended:internal format
1409 * the extended part is the beacon counts
1410 * the internal part is the time in usec within one beacon interval
1411 */
iwl_usecs_to_beacons(struct iwl_priv * priv,u32 usec,u32 beacon_interval)1412 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1413 {
1414 u32 quot;
1415 u32 rem;
1416 u32 interval = beacon_interval * TIME_UNIT;
1417
1418 if (!interval || !usec)
1419 return 0;
1420
1421 quot = (usec / interval) &
1422 (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
1423 IWLAGN_EXT_BEACON_TIME_POS);
1424 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1425 IWLAGN_EXT_BEACON_TIME_POS);
1426
1427 return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
1428 }
1429
1430 /* base is usually what we get from ucode with each received frame,
1431 * the same as HW timer counter counting down
1432 */
iwl_add_beacon_time(struct iwl_priv * priv,u32 base,u32 addon,u32 beacon_interval)1433 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1434 u32 addon, u32 beacon_interval)
1435 {
1436 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1437 IWLAGN_EXT_BEACON_TIME_POS);
1438 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1439 IWLAGN_EXT_BEACON_TIME_POS);
1440 u32 interval = beacon_interval * TIME_UNIT;
1441 u32 res = (base & iwl_beacon_time_mask_high(priv,
1442 IWLAGN_EXT_BEACON_TIME_POS)) +
1443 (addon & iwl_beacon_time_mask_high(priv,
1444 IWLAGN_EXT_BEACON_TIME_POS));
1445
1446 if (base_low > addon_low)
1447 res += base_low - addon_low;
1448 else if (base_low < addon_low) {
1449 res += interval + base_low - addon_low;
1450 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1451 } else
1452 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1453
1454 return cpu_to_le32(res);
1455 }
1456
iwl_nic_error(struct iwl_op_mode * op_mode)1457 void iwl_nic_error(struct iwl_op_mode *op_mode)
1458 {
1459 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1460
1461 iwlagn_fw_error(priv, false);
1462 }
1463
iwl_set_hw_rfkill_state(struct iwl_op_mode * op_mode,bool state)1464 void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
1465 {
1466 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1467
1468 if (state)
1469 set_bit(STATUS_RF_KILL_HW, &priv->status);
1470 else
1471 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1472
1473 wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
1474 }
1475
iwl_free_skb(struct iwl_op_mode * op_mode,struct sk_buff * skb)1476 void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
1477 {
1478 struct ieee80211_tx_info *info;
1479
1480 info = IEEE80211_SKB_CB(skb);
1481 kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
1482 dev_kfree_skb_any(skb);
1483 }
1484