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iwlagn: use sku capabilities information from EEPROM
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-core.c
blob445ddac065412236953718776d25ec728776165d
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" /* FIXME: remove */
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 #include "iwl-agn.h"
45
46 u32 iwl_debug_level;
47
48 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
49
50 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
51 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
52 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
53 struct ieee80211_sta_ht_cap *ht_info,
54 enum ieee80211_band band)
55 {
56 u16 max_bit_rate = 0;
57 u8 rx_chains_num = priv->hw_params.rx_chains_num;
58 u8 tx_chains_num = priv->hw_params.tx_chains_num;
59
60 ht_info->cap = 0;
61 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
62
63 ht_info->ht_supported = true;
64
65 if (priv->cfg->ht_params &&
66 priv->cfg->ht_params->ht_greenfield_support)
67 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
68 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
69 max_bit_rate = MAX_BIT_RATE_20_MHZ;
70 if (priv->hw_params.ht40_channel & BIT(band)) {
71 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
72 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
73 ht_info->mcs.rx_mask[4] = 0x01;
74 max_bit_rate = MAX_BIT_RATE_40_MHZ;
75 }
76
77 if (iwlagn_mod_params.amsdu_size_8K)
78 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
79
80 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
81 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
82 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
83 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
84 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
85 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
86
87 ht_info->mcs.rx_mask[0] = 0xFF;
88 if (rx_chains_num >= 2)
89 ht_info->mcs.rx_mask[1] = 0xFF;
90 if (rx_chains_num >= 3)
91 ht_info->mcs.rx_mask[2] = 0xFF;
92
93 /* Highest supported Rx data rate */
94 max_bit_rate *= rx_chains_num;
95 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
96 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
97
98 /* Tx MCS capabilities */
99 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
100 if (tx_chains_num != rx_chains_num) {
101 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
102 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
103 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
104 }
105 }
106
107 /**
108 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
109 */
110 int iwlcore_init_geos(struct iwl_priv *priv)
111 {
112 struct iwl_channel_info *ch;
113 struct ieee80211_supported_band *sband;
114 struct ieee80211_channel *channels;
115 struct ieee80211_channel *geo_ch;
116 struct ieee80211_rate *rates;
117 int i = 0;
118 s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
119
120 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
121 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
122 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
123 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
124 return 0;
125 }
126
127 channels = kzalloc(sizeof(struct ieee80211_channel) *
128 priv->channel_count, GFP_KERNEL);
129 if (!channels)
130 return -ENOMEM;
131
132 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
133 GFP_KERNEL);
134 if (!rates) {
135 kfree(channels);
136 return -ENOMEM;
137 }
138
139 /* 5.2GHz channels start after the 2.4GHz channels */
140 sband = &priv->bands[IEEE80211_BAND_5GHZ];
141 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
142 /* just OFDM */
143 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
144 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
145
146 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
147 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
148 IEEE80211_BAND_5GHZ);
149
150 sband = &priv->bands[IEEE80211_BAND_2GHZ];
151 sband->channels = channels;
152 /* OFDM & CCK */
153 sband->bitrates = rates;
154 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
155
156 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
157 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
158 IEEE80211_BAND_2GHZ);
159
160 priv->ieee_channels = channels;
161 priv->ieee_rates = rates;
162
163 for (i = 0; i < priv->channel_count; i++) {
164 ch = &priv->channel_info[i];
165
166 /* FIXME: might be removed if scan is OK */
167 if (!is_channel_valid(ch))
168 continue;
169
170 sband = &priv->bands[ch->band];
171
172 geo_ch = &sband->channels[sband->n_channels++];
173
174 geo_ch->center_freq =
175 ieee80211_channel_to_frequency(ch->channel, ch->band);
176 geo_ch->max_power = ch->max_power_avg;
177 geo_ch->max_antenna_gain = 0xff;
178 geo_ch->hw_value = ch->channel;
179
180 if (is_channel_valid(ch)) {
181 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
182 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
183
184 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
185 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
186
187 if (ch->flags & EEPROM_CHANNEL_RADAR)
188 geo_ch->flags |= IEEE80211_CHAN_RADAR;
189
190 geo_ch->flags |= ch->ht40_extension_channel;
191
192 if (ch->max_power_avg > max_tx_power)
193 max_tx_power = ch->max_power_avg;
194 } else {
195 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
196 }
197
198 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
199 ch->channel, geo_ch->center_freq,
200 is_channel_a_band(ch) ? "5.2" : "2.4",
201 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
202 "restricted" : "valid",
203 geo_ch->flags);
204 }
205
206 priv->tx_power_device_lmt = max_tx_power;
207 priv->tx_power_user_lmt = max_tx_power;
208 priv->tx_power_next = max_tx_power;
209
210 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
211 priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
212 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
213 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
214 priv->pci_dev->device,
215 priv->pci_dev->subsystem_device);
216 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
217 }
218
219 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
220 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
221 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
222
223 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
224
225 return 0;
226 }
227
228 /*
229 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
230 */
231 void iwlcore_free_geos(struct iwl_priv *priv)
232 {
233 kfree(priv->ieee_channels);
234 kfree(priv->ieee_rates);
235 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
236 }
237
238 static bool iwl_is_channel_extension(struct iwl_priv *priv,
239 enum ieee80211_band band,
240 u16 channel, u8 extension_chan_offset)
241 {
242 const struct iwl_channel_info *ch_info;
243
244 ch_info = iwl_get_channel_info(priv, band, channel);
245 if (!is_channel_valid(ch_info))
246 return false;
247
248 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
249 return !(ch_info->ht40_extension_channel &
250 IEEE80211_CHAN_NO_HT40PLUS);
251 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
252 return !(ch_info->ht40_extension_channel &
253 IEEE80211_CHAN_NO_HT40MINUS);
254
255 return false;
256 }
257
258 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
259 struct iwl_rxon_context *ctx,
260 struct ieee80211_sta_ht_cap *ht_cap)
261 {
262 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
263 return false;
264
265 /*
266 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
267 * the bit will not set if it is pure 40MHz case
268 */
269 if (ht_cap && !ht_cap->ht_supported)
270 return false;
271
272 #ifdef CONFIG_IWLWIFI_DEBUGFS
273 if (priv->disable_ht40)
274 return false;
275 #endif
276
277 return iwl_is_channel_extension(priv, priv->band,
278 le16_to_cpu(ctx->staging.channel),
279 ctx->ht.extension_chan_offset);
280 }
281
282 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
283 {
284 u16 new_val;
285 u16 beacon_factor;
286
287 /*
288 * If mac80211 hasn't given us a beacon interval, program
289 * the default into the device (not checking this here
290 * would cause the adjustment below to return the maximum
291 * value, which may break PAN.)
292 */
293 if (!beacon_val)
294 return DEFAULT_BEACON_INTERVAL;
295
296 /*
297 * If the beacon interval we obtained from the peer
298 * is too large, we'll have to wake up more often
299 * (and in IBSS case, we'll beacon too much)
300 *
301 * For example, if max_beacon_val is 4096, and the
302 * requested beacon interval is 7000, we'll have to
303 * use 3500 to be able to wake up on the beacons.
304 *
305 * This could badly influence beacon detection stats.
306 */
307
308 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
309 new_val = beacon_val / beacon_factor;
310
311 if (!new_val)
312 new_val = max_beacon_val;
313
314 return new_val;
315 }
316
317 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
318 {
319 u64 tsf;
320 s32 interval_tm, rem;
321 struct ieee80211_conf *conf = NULL;
322 u16 beacon_int;
323 struct ieee80211_vif *vif = ctx->vif;
324
325 conf = ieee80211_get_hw_conf(priv->hw);
326
327 lockdep_assert_held(&priv->mutex);
328
329 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
330
331 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
332 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
333
334 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
335
336 /*
337 * TODO: For IBSS we need to get atim_window from mac80211,
338 * for now just always use 0
339 */
340 ctx->timing.atim_window = 0;
341
342 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
343 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
344 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
345 priv->contexts[IWL_RXON_CTX_BSS].vif &&
346 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
347 ctx->timing.beacon_interval =
348 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
349 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
350 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
351 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
352 priv->contexts[IWL_RXON_CTX_PAN].vif &&
353 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
354 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
355 !ctx->vif->bss_conf.beacon_int)) {
356 ctx->timing.beacon_interval =
357 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
358 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
359 } else {
360 beacon_int = iwl_adjust_beacon_interval(beacon_int,
361 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
362 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
363 }
364
365 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
366 interval_tm = beacon_int * TIME_UNIT;
367 rem = do_div(tsf, interval_tm);
368 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
369
370 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
371
372 IWL_DEBUG_ASSOC(priv,
373 "beacon interval %d beacon timer %d beacon tim %d\n",
374 le16_to_cpu(ctx->timing.beacon_interval),
375 le32_to_cpu(ctx->timing.beacon_init_val),
376 le16_to_cpu(ctx->timing.atim_window));
377
378 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
379 sizeof(ctx->timing), &ctx->timing);
380 }
381
382 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
383 int hw_decrypt)
384 {
385 struct iwl_rxon_cmd *rxon = &ctx->staging;
386
387 if (hw_decrypt)
388 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
389 else
390 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
391
392 }
393
394 /* validate RXON structure is valid */
395 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
396 {
397 struct iwl_rxon_cmd *rxon = &ctx->staging;
398 u32 errors = 0;
399
400 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
401 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
402 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
403 errors |= BIT(0);
404 }
405 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
406 IWL_WARN(priv, "check 2.4G: wrong radar\n");
407 errors |= BIT(1);
408 }
409 } else {
410 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
411 IWL_WARN(priv, "check 5.2G: not short slot!\n");
412 errors |= BIT(2);
413 }
414 if (rxon->flags & RXON_FLG_CCK_MSK) {
415 IWL_WARN(priv, "check 5.2G: CCK!\n");
416 errors |= BIT(3);
417 }
418 }
419 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
420 IWL_WARN(priv, "mac/bssid mcast!\n");
421 errors |= BIT(4);
422 }
423
424 /* make sure basic rates 6Mbps and 1Mbps are supported */
425 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
426 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
427 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
428 errors |= BIT(5);
429 }
430
431 if (le16_to_cpu(rxon->assoc_id) > 2007) {
432 IWL_WARN(priv, "aid > 2007\n");
433 errors |= BIT(6);
434 }
435
436 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
437 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
438 IWL_WARN(priv, "CCK and short slot\n");
439 errors |= BIT(7);
440 }
441
442 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
443 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
444 IWL_WARN(priv, "CCK and auto detect");
445 errors |= BIT(8);
446 }
447
448 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
449 RXON_FLG_TGG_PROTECT_MSK)) ==
450 RXON_FLG_TGG_PROTECT_MSK) {
451 IWL_WARN(priv, "TGg but no auto-detect\n");
452 errors |= BIT(9);
453 }
454
455 if (rxon->channel == 0) {
456 IWL_WARN(priv, "zero channel is invalid\n");
457 errors |= BIT(10);
458 }
459
460 WARN(errors, "Invalid RXON (%#x), channel %d",
461 errors, le16_to_cpu(rxon->channel));
462
463 return errors ? -EINVAL : 0;
464 }
465
466 /**
467 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
468 * @priv: staging_rxon is compared to active_rxon
469 *
470 * If the RXON structure is changing enough to require a new tune,
471 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
472 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
473 */
474 int iwl_full_rxon_required(struct iwl_priv *priv,
475 struct iwl_rxon_context *ctx)
476 {
477 const struct iwl_rxon_cmd *staging = &ctx->staging;
478 const struct iwl_rxon_cmd *active = &ctx->active;
479
480 #define CHK(cond) \
481 if ((cond)) { \
482 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
483 return 1; \
484 }
485
486 #define CHK_NEQ(c1, c2) \
487 if ((c1) != (c2)) { \
488 IWL_DEBUG_INFO(priv, "need full RXON - " \
489 #c1 " != " #c2 " - %d != %d\n", \
490 (c1), (c2)); \
491 return 1; \
492 }
493
494 /* These items are only settable from the full RXON command */
495 CHK(!iwl_is_associated_ctx(ctx));
496 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
497 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
498 CHK(compare_ether_addr(staging->wlap_bssid_addr,
499 active->wlap_bssid_addr));
500 CHK_NEQ(staging->dev_type, active->dev_type);
501 CHK_NEQ(staging->channel, active->channel);
502 CHK_NEQ(staging->air_propagation, active->air_propagation);
503 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
504 active->ofdm_ht_single_stream_basic_rates);
505 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
506 active->ofdm_ht_dual_stream_basic_rates);
507 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
508 active->ofdm_ht_triple_stream_basic_rates);
509 CHK_NEQ(staging->assoc_id, active->assoc_id);
510
511 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
512 * be updated with the RXON_ASSOC command -- however only some
513 * flag transitions are allowed using RXON_ASSOC */
514
515 /* Check if we are not switching bands */
516 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
517 active->flags & RXON_FLG_BAND_24G_MSK);
518
519 /* Check if we are switching association toggle */
520 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
521 active->filter_flags & RXON_FILTER_ASSOC_MSK);
522
523 #undef CHK
524 #undef CHK_NEQ
525
526 return 0;
527 }
528
529 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
530 struct iwl_rxon_context *ctx)
531 {
532 /*
533 * Assign the lowest rate -- should really get this from
534 * the beacon skb from mac80211.
535 */
536 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
537 return IWL_RATE_1M_PLCP;
538 else
539 return IWL_RATE_6M_PLCP;
540 }
541
542 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
543 struct iwl_ht_config *ht_conf,
544 struct iwl_rxon_context *ctx)
545 {
546 struct iwl_rxon_cmd *rxon = &ctx->staging;
547
548 if (!ctx->ht.enabled) {
549 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
550 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
551 RXON_FLG_HT40_PROT_MSK |
552 RXON_FLG_HT_PROT_MSK);
553 return;
554 }
555
556 /* FIXME: if the definition of ht.protection changed, the "translation"
557 * will be needed for rxon->flags
558 */
559 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
560
561 /* Set up channel bandwidth:
562 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
563 /* clear the HT channel mode before set the mode */
564 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
565 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
566 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
567 /* pure ht40 */
568 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
569 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
570 /* Note: control channel is opposite of extension channel */
571 switch (ctx->ht.extension_chan_offset) {
572 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
573 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
574 break;
575 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
576 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
577 break;
578 }
579 } else {
580 /* Note: control channel is opposite of extension channel */
581 switch (ctx->ht.extension_chan_offset) {
582 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
583 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
584 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
585 break;
586 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
587 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
588 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
589 break;
590 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
591 default:
592 /* channel location only valid if in Mixed mode */
593 IWL_ERR(priv, "invalid extension channel offset\n");
594 break;
595 }
596 }
597 } else {
598 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
599 }
600
601 if (priv->cfg->ops->hcmd->set_rxon_chain)
602 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
603
604 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
605 "extension channel offset 0x%x\n",
606 le32_to_cpu(rxon->flags), ctx->ht.protection,
607 ctx->ht.extension_chan_offset);
608 }
609
610 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
611 {
612 struct iwl_rxon_context *ctx;
613
614 for_each_context(priv, ctx)
615 _iwl_set_rxon_ht(priv, ht_conf, ctx);
616 }
617
618 /* Return valid, unused, channel for a passive scan to reset the RF */
619 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
620 enum ieee80211_band band)
621 {
622 const struct iwl_channel_info *ch_info;
623 int i;
624 u8 channel = 0;
625 u8 min, max;
626 struct iwl_rxon_context *ctx;
627
628 if (band == IEEE80211_BAND_5GHZ) {
629 min = 14;
630 max = priv->channel_count;
631 } else {
632 min = 0;
633 max = 14;
634 }
635
636 for (i = min; i < max; i++) {
637 bool busy = false;
638
639 for_each_context(priv, ctx) {
640 busy = priv->channel_info[i].channel ==
641 le16_to_cpu(ctx->staging.channel);
642 if (busy)
643 break;
644 }
645
646 if (busy)
647 continue;
648
649 channel = priv->channel_info[i].channel;
650 ch_info = iwl_get_channel_info(priv, band, channel);
651 if (is_channel_valid(ch_info))
652 break;
653 }
654
655 return channel;
656 }
657
658 /**
659 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
660 * @ch: requested channel as a pointer to struct ieee80211_channel
661
662 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
663 * in the staging RXON flag structure based on the ch->band
664 */
665 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
666 struct iwl_rxon_context *ctx)
667 {
668 enum ieee80211_band band = ch->band;
669 u16 channel = ch->hw_value;
670
671 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
672 (priv->band == band))
673 return 0;
674
675 ctx->staging.channel = cpu_to_le16(channel);
676 if (band == IEEE80211_BAND_5GHZ)
677 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
678 else
679 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
680
681 priv->band = band;
682
683 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
684
685 return 0;
686 }
687
688 void iwl_set_flags_for_band(struct iwl_priv *priv,
689 struct iwl_rxon_context *ctx,
690 enum ieee80211_band band,
691 struct ieee80211_vif *vif)
692 {
693 if (band == IEEE80211_BAND_5GHZ) {
694 ctx->staging.flags &=
695 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
696 | RXON_FLG_CCK_MSK);
697 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
698 } else {
699 /* Copied from iwl_post_associate() */
700 if (vif && vif->bss_conf.use_short_slot)
701 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
702 else
703 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
704
705 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
706 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
707 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
708 }
709 }
710
711 /*
712 * initialize rxon structure with default values from eeprom
713 */
714 void iwl_connection_init_rx_config(struct iwl_priv *priv,
715 struct iwl_rxon_context *ctx)
716 {
717 const struct iwl_channel_info *ch_info;
718
719 memset(&ctx->staging, 0, sizeof(ctx->staging));
720
721 if (!ctx->vif) {
722 ctx->staging.dev_type = ctx->unused_devtype;
723 } else switch (ctx->vif->type) {
724 case NL80211_IFTYPE_AP:
725 ctx->staging.dev_type = ctx->ap_devtype;
726 break;
727
728 case NL80211_IFTYPE_STATION:
729 ctx->staging.dev_type = ctx->station_devtype;
730 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
731 break;
732
733 case NL80211_IFTYPE_ADHOC:
734 ctx->staging.dev_type = ctx->ibss_devtype;
735 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
736 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
737 RXON_FILTER_ACCEPT_GRP_MSK;
738 break;
739
740 default:
741 IWL_ERR(priv, "Unsupported interface type %d\n",
742 ctx->vif->type);
743 break;
744 }
745
746 #if 0
747 /* TODO: Figure out when short_preamble would be set and cache from
748 * that */
749 if (!hw_to_local(priv->hw)->short_preamble)
750 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
751 else
752 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
753 #endif
754
755 ch_info = iwl_get_channel_info(priv, priv->band,
756 le16_to_cpu(ctx->active.channel));
757
758 if (!ch_info)
759 ch_info = &priv->channel_info[0];
760
761 ctx->staging.channel = cpu_to_le16(ch_info->channel);
762 priv->band = ch_info->band;
763
764 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
765
766 ctx->staging.ofdm_basic_rates =
767 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
768 ctx->staging.cck_basic_rates =
769 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
770
771 /* clear both MIX and PURE40 mode flag */
772 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
773 RXON_FLG_CHANNEL_MODE_PURE_40);
774 if (ctx->vif)
775 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
776
777 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
778 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
779 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
780 }
781
782 void iwl_set_rate(struct iwl_priv *priv)
783 {
784 const struct ieee80211_supported_band *hw = NULL;
785 struct ieee80211_rate *rate;
786 struct iwl_rxon_context *ctx;
787 int i;
788
789 hw = iwl_get_hw_mode(priv, priv->band);
790 if (!hw) {
791 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
792 return;
793 }
794
795 priv->active_rate = 0;
796
797 for (i = 0; i < hw->n_bitrates; i++) {
798 rate = &(hw->bitrates[i]);
799 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
800 priv->active_rate |= (1 << rate->hw_value);
801 }
802
803 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
804
805 for_each_context(priv, ctx) {
806 ctx->staging.cck_basic_rates =
807 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
808
809 ctx->staging.ofdm_basic_rates =
810 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
811 }
812 }
813
814 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
815 {
816 /*
817 * MULTI-FIXME
818 * See iwl_mac_channel_switch.
819 */
820 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
821
822 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
823 return;
824
825 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
826 ieee80211_chswitch_done(ctx->vif, is_success);
827 }
828
829 #ifdef CONFIG_IWLWIFI_DEBUG
830 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
831 struct iwl_rxon_context *ctx)
832 {
833 struct iwl_rxon_cmd *rxon = &ctx->staging;
834
835 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
836 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
837 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
838 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
839 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
840 le32_to_cpu(rxon->filter_flags));
841 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
842 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
843 rxon->ofdm_basic_rates);
844 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
845 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
846 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
847 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
848 }
849 #endif
850
851 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
852 {
853 unsigned long flags;
854 struct iwl_notification_wait *wait_entry;
855
856 spin_lock_irqsave(&priv->_agn.notif_wait_lock, flags);
857 list_for_each_entry(wait_entry, &priv->_agn.notif_waits, list)
858 wait_entry->aborted = true;
859 spin_unlock_irqrestore(&priv->_agn.notif_wait_lock, flags);
860
861 wake_up_all(&priv->_agn.notif_waitq);
862 }
863
864 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
865 {
866 unsigned int reload_msec;
867 unsigned long reload_jiffies;
868
869 /* Set the FW error flag -- cleared on iwl_down */
870 set_bit(STATUS_FW_ERROR, &priv->status);
871
872 /* Cancel currently queued command. */
873 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
874
875 iwlagn_abort_notification_waits(priv);
876
877 /* Keep the restart process from trying to send host
878 * commands by clearing the ready bit */
879 clear_bit(STATUS_READY, &priv->status);
880
881 wake_up_interruptible(&priv->wait_command_queue);
882
883 if (!ondemand) {
884 /*
885 * If firmware keep reloading, then it indicate something
886 * serious wrong and firmware having problem to recover
887 * from it. Instead of keep trying which will fill the syslog
888 * and hang the system, let's just stop it
889 */
890 reload_jiffies = jiffies;
891 reload_msec = jiffies_to_msecs((long) reload_jiffies -
892 (long) priv->reload_jiffies);
893 priv->reload_jiffies = reload_jiffies;
894 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
895 priv->reload_count++;
896 if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
897 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
898 return;
899 }
900 } else
901 priv->reload_count = 0;
902 }
903
904 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
905 if (iwlagn_mod_params.restart_fw) {
906 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
907 "Restarting adapter due to uCode error.\n");
908 queue_work(priv->workqueue, &priv->restart);
909 } else
910 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
911 "Detected FW error, but not restarting\n");
912 }
913 }
914
915 /**
916 * iwl_irq_handle_error - called for HW or SW error interrupt from card
917 */
918 void iwl_irq_handle_error(struct iwl_priv *priv)
919 {
920 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
921 if (priv->cfg->internal_wimax_coex &&
922 (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
923 APMS_CLK_VAL_MRB_FUNC_MODE) ||
924 (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
925 APMG_PS_CTRL_VAL_RESET_REQ))) {
926 /*
927 * Keep the restart process from trying to send host
928 * commands by clearing the ready bit.
929 */
930 clear_bit(STATUS_READY, &priv->status);
931 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
932 wake_up_interruptible(&priv->wait_command_queue);
933 IWL_ERR(priv, "RF is used by WiMAX\n");
934 return;
935 }
936
937 IWL_ERR(priv, "Loaded firmware version: %s\n",
938 priv->hw->wiphy->fw_version);
939
940 iwl_dump_nic_error_log(priv);
941 iwl_dump_csr(priv);
942 iwl_dump_fh(priv, NULL, false);
943 iwl_dump_nic_event_log(priv, false, NULL, false);
944 #ifdef CONFIG_IWLWIFI_DEBUG
945 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
946 iwl_print_rx_config_cmd(priv,
947 &priv->contexts[IWL_RXON_CTX_BSS]);
948 #endif
949
950 iwlagn_fw_error(priv, false);
951 }
952
953 static int iwl_apm_stop_master(struct iwl_priv *priv)
954 {
955 int ret = 0;
956
957 /* stop device's busmaster DMA activity */
958 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
959
960 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
961 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
962 if (ret)
963 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
964
965 IWL_DEBUG_INFO(priv, "stop master\n");
966
967 return ret;
968 }
969
970 void iwl_apm_stop(struct iwl_priv *priv)
971 {
972 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
973
974 clear_bit(STATUS_DEVICE_ENABLED, &priv->status);
975
976 /* Stop device's DMA activity */
977 iwl_apm_stop_master(priv);
978
979 /* Reset the entire device */
980 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
981
982 udelay(10);
983
984 /*
985 * Clear "initialization complete" bit to move adapter from
986 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
987 */
988 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
989 }
990
991
992 /*
993 * Start up NIC's basic functionality after it has been reset
994 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
995 * NOTE: This does not load uCode nor start the embedded processor
996 */
997 int iwl_apm_init(struct iwl_priv *priv)
998 {
999 int ret = 0;
1000 u16 lctl;
1001
1002 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1003
1004 /*
1005 * Use "set_bit" below rather than "write", to preserve any hardware
1006 * bits already set by default after reset.
1007 */
1008
1009 /* Disable L0S exit timer (platform NMI Work/Around) */
1010 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1011 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1012
1013 /*
1014 * Disable L0s without affecting L1;
1015 * don't wait for ICH L0s (ICH bug W/A)
1016 */
1017 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1018 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1019
1020 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1021 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1022
1023 /*
1024 * Enable HAP INTA (interrupt from management bus) to
1025 * wake device's PCI Express link L1a -> L0s
1026 */
1027 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1028 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1029
1030 /*
1031 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1032 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1033 * If so (likely), disable L0S, so device moves directly L0->L1;
1034 * costs negligible amount of power savings.
1035 * If not (unlikely), enable L0S, so there is at least some
1036 * power savings, even without L1.
1037 */
1038 lctl = iwl_pcie_link_ctl(priv);
1039 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1040 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1041 /* L1-ASPM enabled; disable(!) L0S */
1042 iwl_set_bit(priv, CSR_GIO_REG,
1043 CSR_GIO_REG_VAL_L0S_ENABLED);
1044 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1045 } else {
1046 /* L1-ASPM disabled; enable(!) L0S */
1047 iwl_clear_bit(priv, CSR_GIO_REG,
1048 CSR_GIO_REG_VAL_L0S_ENABLED);
1049 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1050 }
1051
1052 /* Configure analog phase-lock-loop before activating to D0A */
1053 if (priv->cfg->base_params->pll_cfg_val)
1054 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1055 priv->cfg->base_params->pll_cfg_val);
1056
1057 /*
1058 * Set "initialization complete" bit to move adapter from
1059 * D0U* --> D0A* (powered-up active) state.
1060 */
1061 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1062
1063 /*
1064 * Wait for clock stabilization; once stabilized, access to
1065 * device-internal resources is supported, e.g. iwl_write_prph()
1066 * and accesses to uCode SRAM.
1067 */
1068 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1069 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1070 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1071 if (ret < 0) {
1072 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1073 goto out;
1074 }
1075
1076 /*
1077 * Enable DMA clock and wait for it to stabilize.
1078 *
1079 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1080 * do not disable clocks. This preserves any hardware bits already
1081 * set by default in "CLK_CTRL_REG" after reset.
1082 */
1083 iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1084 udelay(20);
1085
1086 /* Disable L1-Active */
1087 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1088 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1089
1090 set_bit(STATUS_DEVICE_ENABLED, &priv->status);
1091
1092 out:
1093 return ret;
1094 }
1095
1096
1097 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1098 {
1099 int ret;
1100 s8 prev_tx_power;
1101 bool defer;
1102 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1103
1104 lockdep_assert_held(&priv->mutex);
1105
1106 if (priv->tx_power_user_lmt == tx_power && !force)
1107 return 0;
1108
1109 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1110 IWL_WARN(priv,
1111 "Requested user TXPOWER %d below lower limit %d.\n",
1112 tx_power,
1113 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1114 return -EINVAL;
1115 }
1116
1117 if (tx_power > priv->tx_power_device_lmt) {
1118 IWL_WARN(priv,
1119 "Requested user TXPOWER %d above upper limit %d.\n",
1120 tx_power, priv->tx_power_device_lmt);
1121 return -EINVAL;
1122 }
1123
1124 if (!iwl_is_ready_rf(priv))
1125 return -EIO;
1126
1127 /* scan complete and commit_rxon use tx_power_next value,
1128 * it always need to be updated for newest request */
1129 priv->tx_power_next = tx_power;
1130
1131 /* do not set tx power when scanning or channel changing */
1132 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1133 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1134 if (defer && !force) {
1135 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1136 return 0;
1137 }
1138
1139 prev_tx_power = priv->tx_power_user_lmt;
1140 priv->tx_power_user_lmt = tx_power;
1141
1142 ret = iwlagn_send_tx_power(priv);
1143
1144 /* if fail to set tx_power, restore the orig. tx power */
1145 if (ret) {
1146 priv->tx_power_user_lmt = prev_tx_power;
1147 priv->tx_power_next = prev_tx_power;
1148 }
1149 return ret;
1150 }
1151
1152 void iwl_send_bt_config(struct iwl_priv *priv)
1153 {
1154 struct iwl_bt_cmd bt_cmd = {
1155 .lead_time = BT_LEAD_TIME_DEF,
1156 .max_kill = BT_MAX_KILL_DEF,
1157 .kill_ack_mask = 0,
1158 .kill_cts_mask = 0,
1159 };
1160
1161 if (!iwlagn_mod_params.bt_coex_active)
1162 bt_cmd.flags = BT_COEX_DISABLE;
1163 else
1164 bt_cmd.flags = BT_COEX_ENABLE;
1165
1166 priv->bt_enable_flag = bt_cmd.flags;
1167 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1168 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1169
1170 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1171 sizeof(struct iwl_bt_cmd), &bt_cmd))
1172 IWL_ERR(priv, "failed to send BT Coex Config\n");
1173 }
1174
1175 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1176 {
1177 struct iwl_statistics_cmd statistics_cmd = {
1178 .configuration_flags =
1179 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1180 };
1181
1182 if (flags & CMD_ASYNC)
1183 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1184 sizeof(struct iwl_statistics_cmd),
1185 &statistics_cmd, NULL);
1186 else
1187 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1188 sizeof(struct iwl_statistics_cmd),
1189 &statistics_cmd);
1190 }
1191
1192 void iwl_clear_isr_stats(struct iwl_priv *priv)
1193 {
1194 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1195 }
1196
1197 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1198 const struct ieee80211_tx_queue_params *params)
1199 {
1200 struct iwl_priv *priv = hw->priv;
1201 struct iwl_rxon_context *ctx;
1202 unsigned long flags;
1203 int q;
1204
1205 IWL_DEBUG_MAC80211(priv, "enter\n");
1206
1207 if (!iwl_is_ready_rf(priv)) {
1208 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1209 return -EIO;
1210 }
1211
1212 if (queue >= AC_NUM) {
1213 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1214 return 0;
1215 }
1216
1217 q = AC_NUM - 1 - queue;
1218
1219 spin_lock_irqsave(&priv->lock, flags);
1220
1221 /*
1222 * MULTI-FIXME
1223 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1224 */
1225 for_each_context(priv, ctx) {
1226 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1227 cpu_to_le16(params->cw_min);
1228 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1229 cpu_to_le16(params->cw_max);
1230 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1231 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1232 cpu_to_le16((params->txop * 32));
1233
1234 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1235 }
1236
1237 spin_unlock_irqrestore(&priv->lock, flags);
1238
1239 IWL_DEBUG_MAC80211(priv, "leave\n");
1240 return 0;
1241 }
1242
1243 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1244 {
1245 struct iwl_priv *priv = hw->priv;
1246
1247 return priv->ibss_manager == IWL_IBSS_MANAGER;
1248 }
1249
1250 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1251 {
1252 iwl_connection_init_rx_config(priv, ctx);
1253
1254 if (priv->cfg->ops->hcmd->set_rxon_chain)
1255 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1256
1257 return iwlagn_commit_rxon(priv, ctx);
1258 }
1259
1260 static int iwl_setup_interface(struct iwl_priv *priv,
1261 struct iwl_rxon_context *ctx)
1262 {
1263 struct ieee80211_vif *vif = ctx->vif;
1264 int err;
1265
1266 lockdep_assert_held(&priv->mutex);
1267
1268 /*
1269 * This variable will be correct only when there's just
1270 * a single context, but all code using it is for hardware
1271 * that supports only one context.
1272 */
1273 priv->iw_mode = vif->type;
1274
1275 ctx->is_active = true;
1276
1277 err = iwl_set_mode(priv, ctx);
1278 if (err) {
1279 if (!ctx->always_active)
1280 ctx->is_active = false;
1281 return err;
1282 }
1283
1284 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1285 vif->type == NL80211_IFTYPE_ADHOC) {
1286 /*
1287 * pretend to have high BT traffic as long as we
1288 * are operating in IBSS mode, as this will cause
1289 * the rate scaling etc. to behave as intended.
1290 */
1291 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1292 }
1293
1294 return 0;
1295 }
1296
1297 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1298 {
1299 struct iwl_priv *priv = hw->priv;
1300 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1301 struct iwl_rxon_context *tmp, *ctx = NULL;
1302 int err;
1303 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1304
1305 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1306 viftype, vif->addr);
1307
1308 mutex_lock(&priv->mutex);
1309
1310 if (!iwl_is_ready_rf(priv)) {
1311 IWL_WARN(priv, "Try to add interface when device not ready\n");
1312 err = -EINVAL;
1313 goto out;
1314 }
1315
1316 for_each_context(priv, tmp) {
1317 u32 possible_modes =
1318 tmp->interface_modes | tmp->exclusive_interface_modes;
1319
1320 if (tmp->vif) {
1321 /* check if this busy context is exclusive */
1322 if (tmp->exclusive_interface_modes &
1323 BIT(tmp->vif->type)) {
1324 err = -EINVAL;
1325 goto out;
1326 }
1327 continue;
1328 }
1329
1330 if (!(possible_modes & BIT(viftype)))
1331 continue;
1332
1333 /* have maybe usable context w/o interface */
1334 ctx = tmp;
1335 break;
1336 }
1337
1338 if (!ctx) {
1339 err = -EOPNOTSUPP;
1340 goto out;
1341 }
1342
1343 vif_priv->ctx = ctx;
1344 ctx->vif = vif;
1345
1346 err = iwl_setup_interface(priv, ctx);
1347 if (!err)
1348 goto out;
1349
1350 ctx->vif = NULL;
1351 priv->iw_mode = NL80211_IFTYPE_STATION;
1352 out:
1353 mutex_unlock(&priv->mutex);
1354
1355 IWL_DEBUG_MAC80211(priv, "leave\n");
1356 return err;
1357 }
1358
1359 static void iwl_teardown_interface(struct iwl_priv *priv,
1360 struct ieee80211_vif *vif,
1361 bool mode_change)
1362 {
1363 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1364
1365 lockdep_assert_held(&priv->mutex);
1366
1367 if (priv->scan_vif == vif) {
1368 iwl_scan_cancel_timeout(priv, 200);
1369 iwl_force_scan_end(priv);
1370 }
1371
1372 if (!mode_change) {
1373 iwl_set_mode(priv, ctx);
1374 if (!ctx->always_active)
1375 ctx->is_active = false;
1376 }
1377
1378 /*
1379 * When removing the IBSS interface, overwrite the
1380 * BT traffic load with the stored one from the last
1381 * notification, if any. If this is a device that
1382 * doesn't implement this, this has no effect since
1383 * both values are the same and zero.
1384 */
1385 if (vif->type == NL80211_IFTYPE_ADHOC)
1386 priv->bt_traffic_load = priv->last_bt_traffic_load;
1387 }
1388
1389 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1390 struct ieee80211_vif *vif)
1391 {
1392 struct iwl_priv *priv = hw->priv;
1393 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1394
1395 IWL_DEBUG_MAC80211(priv, "enter\n");
1396
1397 mutex_lock(&priv->mutex);
1398
1399 WARN_ON(ctx->vif != vif);
1400 ctx->vif = NULL;
1401
1402 iwl_teardown_interface(priv, vif, false);
1403
1404 mutex_unlock(&priv->mutex);
1405
1406 IWL_DEBUG_MAC80211(priv, "leave\n");
1407
1408 }
1409
1410 int iwl_alloc_txq_mem(struct iwl_priv *priv)
1411 {
1412 if (!priv->txq)
1413 priv->txq = kzalloc(
1414 sizeof(struct iwl_tx_queue) *
1415 priv->cfg->base_params->num_of_queues,
1416 GFP_KERNEL);
1417 if (!priv->txq) {
1418 IWL_ERR(priv, "Not enough memory for txq\n");
1419 return -ENOMEM;
1420 }
1421 return 0;
1422 }
1423
1424 void iwl_free_txq_mem(struct iwl_priv *priv)
1425 {
1426 kfree(priv->txq);
1427 priv->txq = NULL;
1428 }
1429
1430 #ifdef CONFIG_IWLWIFI_DEBUGFS
1431
1432 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1433
1434 void iwl_reset_traffic_log(struct iwl_priv *priv)
1435 {
1436 priv->tx_traffic_idx = 0;
1437 priv->rx_traffic_idx = 0;
1438 if (priv->tx_traffic)
1439 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1440 if (priv->rx_traffic)
1441 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1442 }
1443
1444 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1445 {
1446 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1447
1448 if (iwl_debug_level & IWL_DL_TX) {
1449 if (!priv->tx_traffic) {
1450 priv->tx_traffic =
1451 kzalloc(traffic_size, GFP_KERNEL);
1452 if (!priv->tx_traffic)
1453 return -ENOMEM;
1454 }
1455 }
1456 if (iwl_debug_level & IWL_DL_RX) {
1457 if (!priv->rx_traffic) {
1458 priv->rx_traffic =
1459 kzalloc(traffic_size, GFP_KERNEL);
1460 if (!priv->rx_traffic)
1461 return -ENOMEM;
1462 }
1463 }
1464 iwl_reset_traffic_log(priv);
1465 return 0;
1466 }
1467
1468 void iwl_free_traffic_mem(struct iwl_priv *priv)
1469 {
1470 kfree(priv->tx_traffic);
1471 priv->tx_traffic = NULL;
1472
1473 kfree(priv->rx_traffic);
1474 priv->rx_traffic = NULL;
1475 }
1476
1477 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1478 u16 length, struct ieee80211_hdr *header)
1479 {
1480 __le16 fc;
1481 u16 len;
1482
1483 if (likely(!(iwl_debug_level & IWL_DL_TX)))
1484 return;
1485
1486 if (!priv->tx_traffic)
1487 return;
1488
1489 fc = header->frame_control;
1490 if (ieee80211_is_data(fc)) {
1491 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1492 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1493 memcpy((priv->tx_traffic +
1494 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1495 header, len);
1496 priv->tx_traffic_idx =
1497 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1498 }
1499 }
1500
1501 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1502 u16 length, struct ieee80211_hdr *header)
1503 {
1504 __le16 fc;
1505 u16 len;
1506
1507 if (likely(!(iwl_debug_level & IWL_DL_RX)))
1508 return;
1509
1510 if (!priv->rx_traffic)
1511 return;
1512
1513 fc = header->frame_control;
1514 if (ieee80211_is_data(fc)) {
1515 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1516 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1517 memcpy((priv->rx_traffic +
1518 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1519 header, len);
1520 priv->rx_traffic_idx =
1521 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1522 }
1523 }
1524
1525 const char *get_mgmt_string(int cmd)
1526 {
1527 switch (cmd) {
1528 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1529 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1530 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1531 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1532 IWL_CMD(MANAGEMENT_PROBE_REQ);
1533 IWL_CMD(MANAGEMENT_PROBE_RESP);
1534 IWL_CMD(MANAGEMENT_BEACON);
1535 IWL_CMD(MANAGEMENT_ATIM);
1536 IWL_CMD(MANAGEMENT_DISASSOC);
1537 IWL_CMD(MANAGEMENT_AUTH);
1538 IWL_CMD(MANAGEMENT_DEAUTH);
1539 IWL_CMD(MANAGEMENT_ACTION);
1540 default:
1541 return "UNKNOWN";
1542
1543 }
1544 }
1545
1546 const char *get_ctrl_string(int cmd)
1547 {
1548 switch (cmd) {
1549 IWL_CMD(CONTROL_BACK_REQ);
1550 IWL_CMD(CONTROL_BACK);
1551 IWL_CMD(CONTROL_PSPOLL);
1552 IWL_CMD(CONTROL_RTS);
1553 IWL_CMD(CONTROL_CTS);
1554 IWL_CMD(CONTROL_ACK);
1555 IWL_CMD(CONTROL_CFEND);
1556 IWL_CMD(CONTROL_CFENDACK);
1557 default:
1558 return "UNKNOWN";
1559
1560 }
1561 }
1562
1563 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1564 {
1565 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1566 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1567 }
1568
1569 /*
1570 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1571 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1572 * Use debugFs to display the rx/rx_statistics
1573 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1574 * information will be recorded, but DATA pkt still will be recorded
1575 * for the reason of iwl_led.c need to control the led blinking based on
1576 * number of tx and rx data.
1577 *
1578 */
1579 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1580 {
1581 struct traffic_stats *stats;
1582
1583 if (is_tx)
1584 stats = &priv->tx_stats;
1585 else
1586 stats = &priv->rx_stats;
1587
1588 if (ieee80211_is_mgmt(fc)) {
1589 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1590 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1591 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1592 break;
1593 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1594 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1595 break;
1596 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1597 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1598 break;
1599 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1600 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1601 break;
1602 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1603 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1604 break;
1605 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1606 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1607 break;
1608 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1609 stats->mgmt[MANAGEMENT_BEACON]++;
1610 break;
1611 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1612 stats->mgmt[MANAGEMENT_ATIM]++;
1613 break;
1614 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1615 stats->mgmt[MANAGEMENT_DISASSOC]++;
1616 break;
1617 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1618 stats->mgmt[MANAGEMENT_AUTH]++;
1619 break;
1620 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1621 stats->mgmt[MANAGEMENT_DEAUTH]++;
1622 break;
1623 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1624 stats->mgmt[MANAGEMENT_ACTION]++;
1625 break;
1626 }
1627 } else if (ieee80211_is_ctl(fc)) {
1628 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1629 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1630 stats->ctrl[CONTROL_BACK_REQ]++;
1631 break;
1632 case cpu_to_le16(IEEE80211_STYPE_BACK):
1633 stats->ctrl[CONTROL_BACK]++;
1634 break;
1635 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1636 stats->ctrl[CONTROL_PSPOLL]++;
1637 break;
1638 case cpu_to_le16(IEEE80211_STYPE_RTS):
1639 stats->ctrl[CONTROL_RTS]++;
1640 break;
1641 case cpu_to_le16(IEEE80211_STYPE_CTS):
1642 stats->ctrl[CONTROL_CTS]++;
1643 break;
1644 case cpu_to_le16(IEEE80211_STYPE_ACK):
1645 stats->ctrl[CONTROL_ACK]++;
1646 break;
1647 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1648 stats->ctrl[CONTROL_CFEND]++;
1649 break;
1650 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1651 stats->ctrl[CONTROL_CFENDACK]++;
1652 break;
1653 }
1654 } else {
1655 /* data */
1656 stats->data_cnt++;
1657 stats->data_bytes += len;
1658 }
1659 }
1660 #endif
1661
1662 static void iwl_force_rf_reset(struct iwl_priv *priv)
1663 {
1664 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1665 return;
1666
1667 if (!iwl_is_any_associated(priv)) {
1668 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1669 return;
1670 }
1671 /*
1672 * There is no easy and better way to force reset the radio,
1673 * the only known method is switching channel which will force to
1674 * reset and tune the radio.
1675 * Use internal short scan (single channel) operation to should
1676 * achieve this objective.
1677 * Driver should reset the radio when number of consecutive missed
1678 * beacon, or any other uCode error condition detected.
1679 */
1680 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1681 iwl_internal_short_hw_scan(priv);
1682 }
1683
1684
1685 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1686 {
1687 struct iwl_force_reset *force_reset;
1688
1689 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1690 return -EINVAL;
1691
1692 if (mode >= IWL_MAX_FORCE_RESET) {
1693 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1694 return -EINVAL;
1695 }
1696 force_reset = &priv->force_reset[mode];
1697 force_reset->reset_request_count++;
1698 if (!external) {
1699 if (force_reset->last_force_reset_jiffies &&
1700 time_after(force_reset->last_force_reset_jiffies +
1701 force_reset->reset_duration, jiffies)) {
1702 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1703 force_reset->reset_reject_count++;
1704 return -EAGAIN;
1705 }
1706 }
1707 force_reset->reset_success_count++;
1708 force_reset->last_force_reset_jiffies = jiffies;
1709 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1710 switch (mode) {
1711 case IWL_RF_RESET:
1712 iwl_force_rf_reset(priv);
1713 break;
1714 case IWL_FW_RESET:
1715 /*
1716 * if the request is from external(ex: debugfs),
1717 * then always perform the request in regardless the module
1718 * parameter setting
1719 * if the request is from internal (uCode error or driver
1720 * detect failure), then fw_restart module parameter
1721 * need to be check before performing firmware reload
1722 */
1723 if (!external && !iwlagn_mod_params.restart_fw) {
1724 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1725 "module parameter setting\n");
1726 break;
1727 }
1728 IWL_ERR(priv, "On demand firmware reload\n");
1729 iwlagn_fw_error(priv, true);
1730 break;
1731 }
1732 return 0;
1733 }
1734
1735 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1736 enum nl80211_iftype newtype, bool newp2p)
1737 {
1738 struct iwl_priv *priv = hw->priv;
1739 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1740 struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1741 struct iwl_rxon_context *tmp;
1742 u32 interface_modes;
1743 int err;
1744
1745 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1746
1747 mutex_lock(&priv->mutex);
1748
1749 if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1750 /*
1751 * Huh? But wait ... this can maybe happen when
1752 * we're in the middle of a firmware restart!
1753 */
1754 err = -EBUSY;
1755 goto out;
1756 }
1757
1758 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1759
1760 if (!(interface_modes & BIT(newtype))) {
1761 err = -EBUSY;
1762 goto out;
1763 }
1764
1765 /*
1766 * Refuse a change that should be done by moving from the PAN
1767 * context to the BSS context instead, if the BSS context is
1768 * available and can support the new interface type.
1769 */
1770 if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1771 (bss_ctx->interface_modes & BIT(newtype) ||
1772 bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1773 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1774 err = -EBUSY;
1775 goto out;
1776 }
1777
1778 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1779 for_each_context(priv, tmp) {
1780 if (ctx == tmp)
1781 continue;
1782
1783 if (!tmp->vif)
1784 continue;
1785
1786 /*
1787 * The current mode switch would be exclusive, but
1788 * another context is active ... refuse the switch.
1789 */
1790 err = -EBUSY;
1791 goto out;
1792 }
1793 }
1794
1795 /* success */
1796 iwl_teardown_interface(priv, vif, true);
1797 vif->type = newtype;
1798 vif->p2p = newp2p;
1799 err = iwl_setup_interface(priv, ctx);
1800 WARN_ON(err);
1801 /*
1802 * We've switched internally, but submitting to the
1803 * device may have failed for some reason. Mask this
1804 * error, because otherwise mac80211 will not switch
1805 * (and set the interface type back) and we'll be
1806 * out of sync with it.
1807 */
1808 err = 0;
1809
1810 out:
1811 mutex_unlock(&priv->mutex);
1812 return err;
1813 }
1814
1815 /*
1816 * On every watchdog tick we check (latest) time stamp. If it does not
1817 * change during timeout period and queue is not empty we reset firmware.
1818 */
1819 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
1820 {
1821 struct iwl_tx_queue *txq = &priv->txq[cnt];
1822 struct iwl_queue *q = &txq->q;
1823 unsigned long timeout;
1824 int ret;
1825
1826 if (q->read_ptr == q->write_ptr) {
1827 txq->time_stamp = jiffies;
1828 return 0;
1829 }
1830
1831 timeout = txq->time_stamp +
1832 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1833
1834 if (time_after(jiffies, timeout)) {
1835 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1836 q->id, priv->cfg->base_params->wd_timeout);
1837 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1838 return (ret == -EAGAIN) ? 0 : 1;
1839 }
1840
1841 return 0;
1842 }
1843
1844 /*
1845 * Making watchdog tick be a quarter of timeout assure we will
1846 * discover the queue hung between timeout and 1.25*timeout
1847 */
1848 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1849
1850 /*
1851 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1852 * we reset the firmware. If everything is fine just rearm the timer.
1853 */
1854 void iwl_bg_watchdog(unsigned long data)
1855 {
1856 struct iwl_priv *priv = (struct iwl_priv *)data;
1857 int cnt;
1858 unsigned long timeout;
1859
1860 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1861 return;
1862
1863 timeout = priv->cfg->base_params->wd_timeout;
1864 if (timeout == 0)
1865 return;
1866
1867 /* monitor and check for stuck cmd queue */
1868 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
1869 return;
1870
1871 /* monitor and check for other stuck queues */
1872 if (iwl_is_any_associated(priv)) {
1873 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1874 /* skip as we already checked the command queue */
1875 if (cnt == priv->cmd_queue)
1876 continue;
1877 if (iwl_check_stuck_queue(priv, cnt))
1878 return;
1879 }
1880 }
1881
1882 mod_timer(&priv->watchdog, jiffies +
1883 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1884 }
1885
1886 void iwl_setup_watchdog(struct iwl_priv *priv)
1887 {
1888 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1889
1890 if (timeout)
1891 mod_timer(&priv->watchdog,
1892 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1893 else
1894 del_timer(&priv->watchdog);
1895 }
1896
1897 /*
1898 * extended beacon time format
1899 * time in usec will be changed into a 32-bit value in extended:internal format
1900 * the extended part is the beacon counts
1901 * the internal part is the time in usec within one beacon interval
1902 */
1903 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1904 {
1905 u32 quot;
1906 u32 rem;
1907 u32 interval = beacon_interval * TIME_UNIT;
1908
1909 if (!interval || !usec)
1910 return 0;
1911
1912 quot = (usec / interval) &
1913 (iwl_beacon_time_mask_high(priv,
1914 priv->hw_params.beacon_time_tsf_bits) >>
1915 priv->hw_params.beacon_time_tsf_bits);
1916 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1917 priv->hw_params.beacon_time_tsf_bits);
1918
1919 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1920 }
1921
1922 /* base is usually what we get from ucode with each received frame,
1923 * the same as HW timer counter counting down
1924 */
1925 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1926 u32 addon, u32 beacon_interval)
1927 {
1928 u32 base_low = base & iwl_beacon_time_mask_low(priv,
1929 priv->hw_params.beacon_time_tsf_bits);
1930 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1931 priv->hw_params.beacon_time_tsf_bits);
1932 u32 interval = beacon_interval * TIME_UNIT;
1933 u32 res = (base & iwl_beacon_time_mask_high(priv,
1934 priv->hw_params.beacon_time_tsf_bits)) +
1935 (addon & iwl_beacon_time_mask_high(priv,
1936 priv->hw_params.beacon_time_tsf_bits));
1937
1938 if (base_low > addon_low)
1939 res += base_low - addon_low;
1940 else if (base_low < addon_low) {
1941 res += interval + base_low - addon_low;
1942 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1943 } else
1944 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1945
1946 return cpu_to_le32(res);
1947 }
1948
1949 #ifdef CONFIG_PM
1950
1951 int iwl_pci_suspend(struct device *device)
1952 {
1953 struct pci_dev *pdev = to_pci_dev(device);
1954 struct iwl_priv *priv = pci_get_drvdata(pdev);
1955
1956 /*
1957 * This function is called when system goes into suspend state
1958 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1959 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1960 * it will not call apm_ops.stop() to stop the DMA operation.
1961 * Calling apm_ops.stop here to make sure we stop the DMA.
1962 */
1963 iwl_apm_stop(priv);
1964
1965 return 0;
1966 }
1967
1968 int iwl_pci_resume(struct device *device)
1969 {
1970 struct pci_dev *pdev = to_pci_dev(device);
1971 struct iwl_priv *priv = pci_get_drvdata(pdev);
1972 bool hw_rfkill = false;
1973
1974 /*
1975 * We disable the RETRY_TIMEOUT register (0x41) to keep
1976 * PCI Tx retries from interfering with C3 CPU state.
1977 */
1978 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
1979
1980 iwl_enable_interrupts(priv);
1981
1982 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1983 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1984 hw_rfkill = true;
1985
1986 if (hw_rfkill)
1987 set_bit(STATUS_RF_KILL_HW, &priv->status);
1988 else
1989 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1990
1991 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
1992
1993 return 0;
1994 }
1995
1996 const struct dev_pm_ops iwl_pm_ops = {
1997 .suspend = iwl_pci_suspend,
1998 .resume = iwl_pci_resume,
1999 .freeze = iwl_pci_suspend,
2000 .thaw = iwl_pci_resume,
2001 .poweroff = iwl_pci_suspend,
2002 .restore = iwl_pci_resume,
2003 };
2004
2005 #endif /* CONFIG_PM */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree