1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <net/mac80211.h>
35
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h"
38 #include "iwl-debug.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41 #include "iwl-power.h"
42 #include "iwl-sta.h"
43 #include "iwl-helpers.h"
44
45
46 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
50
51 /*
52 * set bt_coex_active to true, uCode will do kill/defer
53 * every time the priority line is asserted (BT is sending signals on the
54 * priority line in the PCIx).
55 * set bt_coex_active to false, uCode will ignore the BT activity and
56 * perform the normal operation
57 *
58 * User might experience transmit issue on some platform due to WiFi/BT
59 * co-exist problem. The possible behaviors are:
60 * Able to scan and finding all the available AP
61 * Not able to associate with any AP
62 * On those platforms, WiFi communication can be restored by set
63 * "bt_coex_active" module parameter to "false"
64 *
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
66 */
67 static bool bt_coex_active = true;
68 module_param(bt_coex_active, bool, S_IRUGO);
69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
70
71 u32 iwlegacy_debug_level;
72 EXPORT_SYMBOL(iwlegacy_debug_level);
73
74 const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
75 EXPORT_SYMBOL(iwlegacy_bcast_addr);
76
77
78 /* This function both allocates and initializes hw and priv. */
iwl_legacy_alloc_all(struct iwl_cfg * cfg)79 struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
80 {
81 struct iwl_priv *priv;
82 /* mac80211 allocates memory for this device instance, including
83 * space for this driver's private structure */
84 struct ieee80211_hw *hw;
85
86 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
87 cfg->ops->ieee80211_ops);
88 if (hw == NULL) {
89 pr_err("%s: Can not allocate network device\n",
90 cfg->name);
91 goto out;
92 }
93
94 priv = hw->priv;
95 priv->hw = hw;
96
97 out:
98 return hw;
99 }
100 EXPORT_SYMBOL(iwl_legacy_alloc_all);
101
102 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
103 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
iwl_legacy_init_ht_hw_capab(const struct iwl_priv * priv,struct ieee80211_sta_ht_cap * ht_info,enum ieee80211_band band)104 static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
105 struct ieee80211_sta_ht_cap *ht_info,
106 enum ieee80211_band band)
107 {
108 u16 max_bit_rate = 0;
109 u8 rx_chains_num = priv->hw_params.rx_chains_num;
110 u8 tx_chains_num = priv->hw_params.tx_chains_num;
111
112 ht_info->cap = 0;
113 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
114
115 ht_info->ht_supported = true;
116
117 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
118 max_bit_rate = MAX_BIT_RATE_20_MHZ;
119 if (priv->hw_params.ht40_channel & BIT(band)) {
120 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
121 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
122 ht_info->mcs.rx_mask[4] = 0x01;
123 max_bit_rate = MAX_BIT_RATE_40_MHZ;
124 }
125
126 if (priv->cfg->mod_params->amsdu_size_8K)
127 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
128
129 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
130 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
131
132 ht_info->mcs.rx_mask[0] = 0xFF;
133 if (rx_chains_num >= 2)
134 ht_info->mcs.rx_mask[1] = 0xFF;
135 if (rx_chains_num >= 3)
136 ht_info->mcs.rx_mask[2] = 0xFF;
137
138 /* Highest supported Rx data rate */
139 max_bit_rate *= rx_chains_num;
140 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
141 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
142
143 /* Tx MCS capabilities */
144 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
145 if (tx_chains_num != rx_chains_num) {
146 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
147 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
148 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
149 }
150 }
151
152 /**
153 * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
154 */
iwl_legacy_init_geos(struct iwl_priv * priv)155 int iwl_legacy_init_geos(struct iwl_priv *priv)
156 {
157 struct iwl_channel_info *ch;
158 struct ieee80211_supported_band *sband;
159 struct ieee80211_channel *channels;
160 struct ieee80211_channel *geo_ch;
161 struct ieee80211_rate *rates;
162 int i = 0;
163 s8 max_tx_power = 0;
164
165 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
166 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
167 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
168 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
169 return 0;
170 }
171
172 channels = kzalloc(sizeof(struct ieee80211_channel) *
173 priv->channel_count, GFP_KERNEL);
174 if (!channels)
175 return -ENOMEM;
176
177 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
178 GFP_KERNEL);
179 if (!rates) {
180 kfree(channels);
181 return -ENOMEM;
182 }
183
184 /* 5.2GHz channels start after the 2.4GHz channels */
185 sband = &priv->bands[IEEE80211_BAND_5GHZ];
186 sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
187 /* just OFDM */
188 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
189 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
190
191 if (priv->cfg->sku & IWL_SKU_N)
192 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
193 IEEE80211_BAND_5GHZ);
194
195 sband = &priv->bands[IEEE80211_BAND_2GHZ];
196 sband->channels = channels;
197 /* OFDM & CCK */
198 sband->bitrates = rates;
199 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
200
201 if (priv->cfg->sku & IWL_SKU_N)
202 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
203 IEEE80211_BAND_2GHZ);
204
205 priv->ieee_channels = channels;
206 priv->ieee_rates = rates;
207
208 for (i = 0; i < priv->channel_count; i++) {
209 ch = &priv->channel_info[i];
210
211 if (!iwl_legacy_is_channel_valid(ch))
212 continue;
213
214 if (iwl_legacy_is_channel_a_band(ch))
215 sband = &priv->bands[IEEE80211_BAND_5GHZ];
216 else
217 sband = &priv->bands[IEEE80211_BAND_2GHZ];
218
219 geo_ch = &sband->channels[sband->n_channels++];
220
221 geo_ch->center_freq =
222 ieee80211_channel_to_frequency(ch->channel, ch->band);
223 geo_ch->max_power = ch->max_power_avg;
224 geo_ch->max_antenna_gain = 0xff;
225 geo_ch->hw_value = ch->channel;
226
227 if (iwl_legacy_is_channel_valid(ch)) {
228 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
229 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
230
231 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
232 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
233
234 if (ch->flags & EEPROM_CHANNEL_RADAR)
235 geo_ch->flags |= IEEE80211_CHAN_RADAR;
236
237 geo_ch->flags |= ch->ht40_extension_channel;
238
239 if (ch->max_power_avg > max_tx_power)
240 max_tx_power = ch->max_power_avg;
241 } else {
242 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
243 }
244
245 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
246 ch->channel, geo_ch->center_freq,
247 iwl_legacy_is_channel_a_band(ch) ? "5.2" : "2.4",
248 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
249 "restricted" : "valid",
250 geo_ch->flags);
251 }
252
253 priv->tx_power_device_lmt = max_tx_power;
254 priv->tx_power_user_lmt = max_tx_power;
255 priv->tx_power_next = max_tx_power;
256
257 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
258 priv->cfg->sku & IWL_SKU_A) {
259 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
260 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
261 priv->pci_dev->device,
262 priv->pci_dev->subsystem_device);
263 priv->cfg->sku &= ~IWL_SKU_A;
264 }
265
266 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
267 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
268 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
269
270 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
271
272 return 0;
273 }
274 EXPORT_SYMBOL(iwl_legacy_init_geos);
275
276 /*
277 * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
278 */
iwl_legacy_free_geos(struct iwl_priv * priv)279 void iwl_legacy_free_geos(struct iwl_priv *priv)
280 {
281 kfree(priv->ieee_channels);
282 kfree(priv->ieee_rates);
283 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
284 }
285 EXPORT_SYMBOL(iwl_legacy_free_geos);
286
iwl_legacy_is_channel_extension(struct iwl_priv * priv,enum ieee80211_band band,u16 channel,u8 extension_chan_offset)287 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
288 enum ieee80211_band band,
289 u16 channel, u8 extension_chan_offset)
290 {
291 const struct iwl_channel_info *ch_info;
292
293 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
294 if (!iwl_legacy_is_channel_valid(ch_info))
295 return false;
296
297 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
298 return !(ch_info->ht40_extension_channel &
299 IEEE80211_CHAN_NO_HT40PLUS);
300 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
301 return !(ch_info->ht40_extension_channel &
302 IEEE80211_CHAN_NO_HT40MINUS);
303
304 return false;
305 }
306
iwl_legacy_is_ht40_tx_allowed(struct iwl_priv * priv,struct iwl_rxon_context * ctx,struct ieee80211_sta_ht_cap * ht_cap)307 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
308 struct iwl_rxon_context *ctx,
309 struct ieee80211_sta_ht_cap *ht_cap)
310 {
311 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
312 return false;
313
314 /*
315 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
316 * the bit will not set if it is pure 40MHz case
317 */
318 if (ht_cap && !ht_cap->ht_supported)
319 return false;
320
321 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
322 if (priv->disable_ht40)
323 return false;
324 #endif
325
326 return iwl_legacy_is_channel_extension(priv, priv->band,
327 le16_to_cpu(ctx->staging.channel),
328 ctx->ht.extension_chan_offset);
329 }
330 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
331
iwl_legacy_adjust_beacon_interval(u16 beacon_val,u16 max_beacon_val)332 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
333 {
334 u16 new_val;
335 u16 beacon_factor;
336
337 /*
338 * If mac80211 hasn't given us a beacon interval, program
339 * the default into the device.
340 */
341 if (!beacon_val)
342 return DEFAULT_BEACON_INTERVAL;
343
344 /*
345 * If the beacon interval we obtained from the peer
346 * is too large, we'll have to wake up more often
347 * (and in IBSS case, we'll beacon too much)
348 *
349 * For example, if max_beacon_val is 4096, and the
350 * requested beacon interval is 7000, we'll have to
351 * use 3500 to be able to wake up on the beacons.
352 *
353 * This could badly influence beacon detection stats.
354 */
355
356 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
357 new_val = beacon_val / beacon_factor;
358
359 if (!new_val)
360 new_val = max_beacon_val;
361
362 return new_val;
363 }
364
365 int
iwl_legacy_send_rxon_timing(struct iwl_priv * priv,struct iwl_rxon_context * ctx)366 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
367 {
368 u64 tsf;
369 s32 interval_tm, rem;
370 struct ieee80211_conf *conf = NULL;
371 u16 beacon_int;
372 struct ieee80211_vif *vif = ctx->vif;
373
374 conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
375
376 lockdep_assert_held(&priv->mutex);
377
378 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
379
380 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
381 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
382
383 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
384
385 /*
386 * TODO: For IBSS we need to get atim_window from mac80211,
387 * for now just always use 0
388 */
389 ctx->timing.atim_window = 0;
390
391 beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
392 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
393 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
394
395 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
396 interval_tm = beacon_int * TIME_UNIT;
397 rem = do_div(tsf, interval_tm);
398 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
399
400 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
401
402 IWL_DEBUG_ASSOC(priv,
403 "beacon interval %d beacon timer %d beacon tim %d\n",
404 le16_to_cpu(ctx->timing.beacon_interval),
405 le32_to_cpu(ctx->timing.beacon_init_val),
406 le16_to_cpu(ctx->timing.atim_window));
407
408 return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
409 sizeof(ctx->timing), &ctx->timing);
410 }
411 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
412
413 void
iwl_legacy_set_rxon_hwcrypto(struct iwl_priv * priv,struct iwl_rxon_context * ctx,int hw_decrypt)414 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
415 struct iwl_rxon_context *ctx,
416 int hw_decrypt)
417 {
418 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
419
420 if (hw_decrypt)
421 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
422 else
423 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
424
425 }
426 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
427
428 /* validate RXON structure is valid */
429 int
iwl_legacy_check_rxon_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx)430 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
431 {
432 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
433 bool error = false;
434
435 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
436 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
437 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
438 error = true;
439 }
440 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
441 IWL_WARN(priv, "check 2.4G: wrong radar\n");
442 error = true;
443 }
444 } else {
445 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
446 IWL_WARN(priv, "check 5.2G: not short slot!\n");
447 error = true;
448 }
449 if (rxon->flags & RXON_FLG_CCK_MSK) {
450 IWL_WARN(priv, "check 5.2G: CCK!\n");
451 error = true;
452 }
453 }
454 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
455 IWL_WARN(priv, "mac/bssid mcast!\n");
456 error = true;
457 }
458
459 /* make sure basic rates 6Mbps and 1Mbps are supported */
460 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
461 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
462 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
463 error = true;
464 }
465
466 if (le16_to_cpu(rxon->assoc_id) > 2007) {
467 IWL_WARN(priv, "aid > 2007\n");
468 error = true;
469 }
470
471 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
472 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
473 IWL_WARN(priv, "CCK and short slot\n");
474 error = true;
475 }
476
477 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
478 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
479 IWL_WARN(priv, "CCK and auto detect");
480 error = true;
481 }
482
483 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
484 RXON_FLG_TGG_PROTECT_MSK)) ==
485 RXON_FLG_TGG_PROTECT_MSK) {
486 IWL_WARN(priv, "TGg but no auto-detect\n");
487 error = true;
488 }
489
490 if (error)
491 IWL_WARN(priv, "Tuning to channel %d\n",
492 le16_to_cpu(rxon->channel));
493
494 if (error) {
495 IWL_ERR(priv, "Invalid RXON\n");
496 return -EINVAL;
497 }
498 return 0;
499 }
500 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
501
502 /**
503 * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
504 * @priv: staging_rxon is compared to active_rxon
505 *
506 * If the RXON structure is changing enough to require a new tune,
507 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
508 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
509 */
iwl_legacy_full_rxon_required(struct iwl_priv * priv,struct iwl_rxon_context * ctx)510 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
511 struct iwl_rxon_context *ctx)
512 {
513 const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
514 const struct iwl_legacy_rxon_cmd *active = &ctx->active;
515
516 #define CHK(cond) \
517 if ((cond)) { \
518 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
519 return 1; \
520 }
521
522 #define CHK_NEQ(c1, c2) \
523 if ((c1) != (c2)) { \
524 IWL_DEBUG_INFO(priv, "need full RXON - " \
525 #c1 " != " #c2 " - %d != %d\n", \
526 (c1), (c2)); \
527 return 1; \
528 }
529
530 /* These items are only settable from the full RXON command */
531 CHK(!iwl_legacy_is_associated_ctx(ctx));
532 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
533 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
534 CHK(compare_ether_addr(staging->wlap_bssid_addr,
535 active->wlap_bssid_addr));
536 CHK_NEQ(staging->dev_type, active->dev_type);
537 CHK_NEQ(staging->channel, active->channel);
538 CHK_NEQ(staging->air_propagation, active->air_propagation);
539 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
540 active->ofdm_ht_single_stream_basic_rates);
541 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
542 active->ofdm_ht_dual_stream_basic_rates);
543 CHK_NEQ(staging->assoc_id, active->assoc_id);
544
545 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
546 * be updated with the RXON_ASSOC command -- however only some
547 * flag transitions are allowed using RXON_ASSOC */
548
549 /* Check if we are not switching bands */
550 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
551 active->flags & RXON_FLG_BAND_24G_MSK);
552
553 /* Check if we are switching association toggle */
554 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
555 active->filter_flags & RXON_FILTER_ASSOC_MSK);
556
557 #undef CHK
558 #undef CHK_NEQ
559
560 return 0;
561 }
562 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
563
iwl_legacy_get_lowest_plcp(struct iwl_priv * priv,struct iwl_rxon_context * ctx)564 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
565 struct iwl_rxon_context *ctx)
566 {
567 /*
568 * Assign the lowest rate -- should really get this from
569 * the beacon skb from mac80211.
570 */
571 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
572 return IWL_RATE_1M_PLCP;
573 else
574 return IWL_RATE_6M_PLCP;
575 }
576 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
577
_iwl_legacy_set_rxon_ht(struct iwl_priv * priv,struct iwl_ht_config * ht_conf,struct iwl_rxon_context * ctx)578 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
579 struct iwl_ht_config *ht_conf,
580 struct iwl_rxon_context *ctx)
581 {
582 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
583
584 if (!ctx->ht.enabled) {
585 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
586 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
587 RXON_FLG_HT40_PROT_MSK |
588 RXON_FLG_HT_PROT_MSK);
589 return;
590 }
591
592 rxon->flags |= cpu_to_le32(ctx->ht.protection <<
593 RXON_FLG_HT_OPERATING_MODE_POS);
594
595 /* Set up channel bandwidth:
596 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
597 /* clear the HT channel mode before set the mode */
598 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
599 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
600 if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
601 /* pure ht40 */
602 if (ctx->ht.protection ==
603 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
604 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
605 /* Note: control channel is opposite of extension channel */
606 switch (ctx->ht.extension_chan_offset) {
607 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
608 rxon->flags &=
609 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
610 break;
611 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
612 rxon->flags |=
613 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
614 break;
615 }
616 } else {
617 /* Note: control channel is opposite of extension channel */
618 switch (ctx->ht.extension_chan_offset) {
619 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
620 rxon->flags &=
621 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
622 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
623 break;
624 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
625 rxon->flags |=
626 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
627 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
628 break;
629 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
630 default:
631 /* channel location only valid if in Mixed mode */
632 IWL_ERR(priv,
633 "invalid extension channel offset\n");
634 break;
635 }
636 }
637 } else {
638 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
639 }
640
641 if (priv->cfg->ops->hcmd->set_rxon_chain)
642 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
643
644 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
645 "extension channel offset 0x%x\n",
646 le32_to_cpu(rxon->flags), ctx->ht.protection,
647 ctx->ht.extension_chan_offset);
648 }
649
iwl_legacy_set_rxon_ht(struct iwl_priv * priv,struct iwl_ht_config * ht_conf)650 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
651 {
652 struct iwl_rxon_context *ctx;
653
654 for_each_context(priv, ctx)
655 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
656 }
657 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
658
659 /* Return valid, unused, channel for a passive scan to reset the RF */
iwl_legacy_get_single_channel_number(struct iwl_priv * priv,enum ieee80211_band band)660 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
661 enum ieee80211_band band)
662 {
663 const struct iwl_channel_info *ch_info;
664 int i;
665 u8 channel = 0;
666 u8 min, max;
667 struct iwl_rxon_context *ctx;
668
669 if (band == IEEE80211_BAND_5GHZ) {
670 min = 14;
671 max = priv->channel_count;
672 } else {
673 min = 0;
674 max = 14;
675 }
676
677 for (i = min; i < max; i++) {
678 bool busy = false;
679
680 for_each_context(priv, ctx) {
681 busy = priv->channel_info[i].channel ==
682 le16_to_cpu(ctx->staging.channel);
683 if (busy)
684 break;
685 }
686
687 if (busy)
688 continue;
689
690 channel = priv->channel_info[i].channel;
691 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
692 if (iwl_legacy_is_channel_valid(ch_info))
693 break;
694 }
695
696 return channel;
697 }
698 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
699
700 /**
701 * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
702 * @ch: requested channel as a pointer to struct ieee80211_channel
703
704 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
705 * in the staging RXON flag structure based on the ch->band
706 */
707 int
iwl_legacy_set_rxon_channel(struct iwl_priv * priv,struct ieee80211_channel * ch,struct iwl_rxon_context * ctx)708 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
709 struct iwl_rxon_context *ctx)
710 {
711 enum ieee80211_band band = ch->band;
712 u16 channel = ch->hw_value;
713
714 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
715 (priv->band == band))
716 return 0;
717
718 ctx->staging.channel = cpu_to_le16(channel);
719 if (band == IEEE80211_BAND_5GHZ)
720 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
721 else
722 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
723
724 priv->band = band;
725
726 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
727
728 return 0;
729 }
730 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
731
iwl_legacy_set_flags_for_band(struct iwl_priv * priv,struct iwl_rxon_context * ctx,enum ieee80211_band band,struct ieee80211_vif * vif)732 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
733 struct iwl_rxon_context *ctx,
734 enum ieee80211_band band,
735 struct ieee80211_vif *vif)
736 {
737 if (band == IEEE80211_BAND_5GHZ) {
738 ctx->staging.flags &=
739 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
740 | RXON_FLG_CCK_MSK);
741 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
742 } else {
743 /* Copied from iwl_post_associate() */
744 if (vif && vif->bss_conf.use_short_slot)
745 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
746 else
747 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
748
749 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
750 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
751 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
752 }
753 }
754 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
755
756 /*
757 * initialize rxon structure with default values from eeprom
758 */
iwl_legacy_connection_init_rx_config(struct iwl_priv * priv,struct iwl_rxon_context * ctx)759 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
760 struct iwl_rxon_context *ctx)
761 {
762 const struct iwl_channel_info *ch_info;
763
764 memset(&ctx->staging, 0, sizeof(ctx->staging));
765
766 if (!ctx->vif) {
767 ctx->staging.dev_type = ctx->unused_devtype;
768 } else
769 switch (ctx->vif->type) {
770
771 case NL80211_IFTYPE_STATION:
772 ctx->staging.dev_type = ctx->station_devtype;
773 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
774 break;
775
776 case NL80211_IFTYPE_ADHOC:
777 ctx->staging.dev_type = ctx->ibss_devtype;
778 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
779 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
780 RXON_FILTER_ACCEPT_GRP_MSK;
781 break;
782
783 default:
784 IWL_ERR(priv, "Unsupported interface type %d\n",
785 ctx->vif->type);
786 break;
787 }
788
789 #if 0
790 /* TODO: Figure out when short_preamble would be set and cache from
791 * that */
792 if (!hw_to_local(priv->hw)->short_preamble)
793 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
794 else
795 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
796 #endif
797
798 ch_info = iwl_legacy_get_channel_info(priv, priv->band,
799 le16_to_cpu(ctx->active.channel));
800
801 if (!ch_info)
802 ch_info = &priv->channel_info[0];
803
804 ctx->staging.channel = cpu_to_le16(ch_info->channel);
805 priv->band = ch_info->band;
806
807 iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
808
809 ctx->staging.ofdm_basic_rates =
810 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
811 ctx->staging.cck_basic_rates =
812 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
813
814 /* clear both MIX and PURE40 mode flag */
815 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
816 RXON_FLG_CHANNEL_MODE_PURE_40);
817 if (ctx->vif)
818 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
819
820 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
821 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
822 }
823 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
824
iwl_legacy_set_rate(struct iwl_priv * priv)825 void iwl_legacy_set_rate(struct iwl_priv *priv)
826 {
827 const struct ieee80211_supported_band *hw = NULL;
828 struct ieee80211_rate *rate;
829 struct iwl_rxon_context *ctx;
830 int i;
831
832 hw = iwl_get_hw_mode(priv, priv->band);
833 if (!hw) {
834 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
835 return;
836 }
837
838 priv->active_rate = 0;
839
840 for (i = 0; i < hw->n_bitrates; i++) {
841 rate = &(hw->bitrates[i]);
842 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
843 priv->active_rate |= (1 << rate->hw_value);
844 }
845
846 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
847
848 for_each_context(priv, ctx) {
849 ctx->staging.cck_basic_rates =
850 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
851
852 ctx->staging.ofdm_basic_rates =
853 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
854 }
855 }
856 EXPORT_SYMBOL(iwl_legacy_set_rate);
857
iwl_legacy_chswitch_done(struct iwl_priv * priv,bool is_success)858 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
859 {
860 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
861
862 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
863 return;
864
865 if (priv->switch_rxon.switch_in_progress) {
866 ieee80211_chswitch_done(ctx->vif, is_success);
867 mutex_lock(&priv->mutex);
868 priv->switch_rxon.switch_in_progress = false;
869 mutex_unlock(&priv->mutex);
870 }
871 }
872 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
873
iwl_legacy_rx_csa(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb)874 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
875 {
876 struct iwl_rx_packet *pkt = rxb_addr(rxb);
877 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
878
879 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
880 struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
881
882 if (priv->switch_rxon.switch_in_progress) {
883 if (!le32_to_cpu(csa->status) &&
884 (csa->channel == priv->switch_rxon.channel)) {
885 rxon->channel = csa->channel;
886 ctx->staging.channel = csa->channel;
887 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
888 le16_to_cpu(csa->channel));
889 iwl_legacy_chswitch_done(priv, true);
890 } else {
891 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
892 le16_to_cpu(csa->channel));
893 iwl_legacy_chswitch_done(priv, false);
894 }
895 }
896 }
897 EXPORT_SYMBOL(iwl_legacy_rx_csa);
898
899 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
iwl_legacy_print_rx_config_cmd(struct iwl_priv * priv,struct iwl_rxon_context * ctx)900 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
901 struct iwl_rxon_context *ctx)
902 {
903 struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
904
905 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
906 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
907 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
908 le16_to_cpu(rxon->channel));
909 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
910 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
911 le32_to_cpu(rxon->filter_flags));
912 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
913 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
914 rxon->ofdm_basic_rates);
915 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
916 rxon->cck_basic_rates);
917 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
918 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
919 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
920 le16_to_cpu(rxon->assoc_id));
921 }
922 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
923 #endif
924 /**
925 * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
926 */
iwl_legacy_irq_handle_error(struct iwl_priv * priv)927 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
928 {
929 /* Set the FW error flag -- cleared on iwl_down */
930 set_bit(STATUS_FW_ERROR, &priv->status);
931
932 /* Cancel currently queued command. */
933 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
934
935 IWL_ERR(priv, "Loaded firmware version: %s\n",
936 priv->hw->wiphy->fw_version);
937
938 priv->cfg->ops->lib->dump_nic_error_log(priv);
939 if (priv->cfg->ops->lib->dump_fh)
940 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
941 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
942 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
943 if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
944 iwl_legacy_print_rx_config_cmd(priv,
945 &priv->contexts[IWL_RXON_CTX_BSS]);
946 #endif
947
948 wake_up_interruptible(&priv->wait_command_queue);
949
950 /* Keep the restart process from trying to send host
951 * commands by clearing the INIT status bit */
952 clear_bit(STATUS_READY, &priv->status);
953
954 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
955 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
956 "Restarting adapter due to uCode error.\n");
957
958 if (priv->cfg->mod_params->restart_fw)
959 queue_work(priv->workqueue, &priv->restart);
960 }
961 }
962 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
963
iwl_legacy_apm_stop_master(struct iwl_priv * priv)964 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
965 {
966 int ret = 0;
967
968 /* stop device's busmaster DMA activity */
969 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
970
971 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
972 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
973 if (ret)
974 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
975
976 IWL_DEBUG_INFO(priv, "stop master\n");
977
978 return ret;
979 }
980
iwl_legacy_apm_stop(struct iwl_priv * priv)981 void iwl_legacy_apm_stop(struct iwl_priv *priv)
982 {
983 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
984
985 /* Stop device's DMA activity */
986 iwl_legacy_apm_stop_master(priv);
987
988 /* Reset the entire device */
989 iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
990
991 udelay(10);
992
993 /*
994 * Clear "initialization complete" bit to move adapter from
995 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
996 */
997 iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
998 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
999 }
1000 EXPORT_SYMBOL(iwl_legacy_apm_stop);
1001
1002
1003 /*
1004 * Start up NIC's basic functionality after it has been reset
1005 * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
1006 * NOTE: This does not load uCode nor start the embedded processor
1007 */
iwl_legacy_apm_init(struct iwl_priv * priv)1008 int iwl_legacy_apm_init(struct iwl_priv *priv)
1009 {
1010 int ret = 0;
1011 u16 lctl;
1012
1013 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1014
1015 /*
1016 * Use "set_bit" below rather than "write", to preserve any hardware
1017 * bits already set by default after reset.
1018 */
1019
1020 /* Disable L0S exit timer (platform NMI Work/Around) */
1021 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1022 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1023
1024 /*
1025 * Disable L0s without affecting L1;
1026 * don't wait for ICH L0s (ICH bug W/A)
1027 */
1028 iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1029 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1030
1031 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1032 iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1033 CSR_DBG_HPET_MEM_REG_VAL);
1034
1035 /*
1036 * Enable HAP INTA (interrupt from management bus) to
1037 * wake device's PCI Express link L1a -> L0s
1038 * NOTE: This is no-op for 3945 (non-existent bit)
1039 */
1040 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1041 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1042
1043 /*
1044 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1045 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1046 * If so (likely), disable L0S, so device moves directly L0->L1;
1047 * costs negligible amount of power savings.
1048 * If not (unlikely), enable L0S, so there is at least some
1049 * power savings, even without L1.
1050 */
1051 if (priv->cfg->base_params->set_l0s) {
1052 lctl = iwl_legacy_pcie_link_ctl(priv);
1053 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1054 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1055 /* L1-ASPM enabled; disable(!) L0S */
1056 iwl_legacy_set_bit(priv, CSR_GIO_REG,
1057 CSR_GIO_REG_VAL_L0S_ENABLED);
1058 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1059 } else {
1060 /* L1-ASPM disabled; enable(!) L0S */
1061 iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1062 CSR_GIO_REG_VAL_L0S_ENABLED);
1063 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1064 }
1065 }
1066
1067 /* Configure analog phase-lock-loop before activating to D0A */
1068 if (priv->cfg->base_params->pll_cfg_val)
1069 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1070 priv->cfg->base_params->pll_cfg_val);
1071
1072 /*
1073 * Set "initialization complete" bit to move adapter from
1074 * D0U* --> D0A* (powered-up active) state.
1075 */
1076 iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1077
1078 /*
1079 * Wait for clock stabilization; once stabilized, access to
1080 * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1081 * and accesses to uCode SRAM.
1082 */
1083 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1084 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1085 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1086 if (ret < 0) {
1087 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1088 goto out;
1089 }
1090
1091 /*
1092 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1093 * BSM (Boostrap State Machine) is only in 3945 and 4965.
1094 *
1095 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1096 * do not disable clocks. This preserves any hardware bits already
1097 * set by default in "CLK_CTRL_REG" after reset.
1098 */
1099 if (priv->cfg->base_params->use_bsm)
1100 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1101 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1102 else
1103 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1104 APMG_CLK_VAL_DMA_CLK_RQT);
1105 udelay(20);
1106
1107 /* Disable L1-Active */
1108 iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1109 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1110
1111 out:
1112 return ret;
1113 }
1114 EXPORT_SYMBOL(iwl_legacy_apm_init);
1115
1116
iwl_legacy_set_tx_power(struct iwl_priv * priv,s8 tx_power,bool force)1117 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1118 {
1119 int ret;
1120 s8 prev_tx_power;
1121 bool defer;
1122 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1123
1124 lockdep_assert_held(&priv->mutex);
1125
1126 if (priv->tx_power_user_lmt == tx_power && !force)
1127 return 0;
1128
1129 if (!priv->cfg->ops->lib->send_tx_power)
1130 return -EOPNOTSUPP;
1131
1132 /* 0 dBm mean 1 milliwatt */
1133 if (tx_power < 0) {
1134 IWL_WARN(priv,
1135 "Requested user TXPOWER %d below 1 mW.\n",
1136 tx_power);
1137 return -EINVAL;
1138 }
1139
1140 if (tx_power > priv->tx_power_device_lmt) {
1141 IWL_WARN(priv,
1142 "Requested user TXPOWER %d above upper limit %d.\n",
1143 tx_power, priv->tx_power_device_lmt);
1144 return -EINVAL;
1145 }
1146
1147 if (!iwl_legacy_is_ready_rf(priv))
1148 return -EIO;
1149
1150 /* scan complete and commit_rxon use tx_power_next value,
1151 * it always need to be updated for newest request */
1152 priv->tx_power_next = tx_power;
1153
1154 /* do not set tx power when scanning or channel changing */
1155 defer = test_bit(STATUS_SCANNING, &priv->status) ||
1156 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1157 if (defer && !force) {
1158 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1159 return 0;
1160 }
1161
1162 prev_tx_power = priv->tx_power_user_lmt;
1163 priv->tx_power_user_lmt = tx_power;
1164
1165 ret = priv->cfg->ops->lib->send_tx_power(priv);
1166
1167 /* if fail to set tx_power, restore the orig. tx power */
1168 if (ret) {
1169 priv->tx_power_user_lmt = prev_tx_power;
1170 priv->tx_power_next = prev_tx_power;
1171 }
1172 return ret;
1173 }
1174 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1175
iwl_legacy_send_bt_config(struct iwl_priv * priv)1176 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1177 {
1178 struct iwl_bt_cmd bt_cmd = {
1179 .lead_time = BT_LEAD_TIME_DEF,
1180 .max_kill = BT_MAX_KILL_DEF,
1181 .kill_ack_mask = 0,
1182 .kill_cts_mask = 0,
1183 };
1184
1185 if (!bt_coex_active)
1186 bt_cmd.flags = BT_COEX_DISABLE;
1187 else
1188 bt_cmd.flags = BT_COEX_ENABLE;
1189
1190 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1191 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1192
1193 if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1194 sizeof(struct iwl_bt_cmd), &bt_cmd))
1195 IWL_ERR(priv, "failed to send BT Coex Config\n");
1196 }
1197 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1198
iwl_legacy_send_statistics_request(struct iwl_priv * priv,u8 flags,bool clear)1199 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1200 {
1201 struct iwl_statistics_cmd statistics_cmd = {
1202 .configuration_flags =
1203 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1204 };
1205
1206 if (flags & CMD_ASYNC)
1207 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1208 sizeof(struct iwl_statistics_cmd),
1209 &statistics_cmd, NULL);
1210 else
1211 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1212 sizeof(struct iwl_statistics_cmd),
1213 &statistics_cmd);
1214 }
1215 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1216
iwl_legacy_rx_pm_sleep_notif(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb)1217 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1218 struct iwl_rx_mem_buffer *rxb)
1219 {
1220 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1221 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1222 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1223 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1224 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1225 #endif
1226 }
1227 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1228
iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb)1229 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1230 struct iwl_rx_mem_buffer *rxb)
1231 {
1232 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1233 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1234 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1235 "notification for %s:\n", len,
1236 iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1237 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1238 }
1239 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1240
iwl_legacy_rx_reply_error(struct iwl_priv * priv,struct iwl_rx_mem_buffer * rxb)1241 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1242 struct iwl_rx_mem_buffer *rxb)
1243 {
1244 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1245
1246 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1247 "seq 0x%04X ser 0x%08X\n",
1248 le32_to_cpu(pkt->u.err_resp.error_type),
1249 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1250 pkt->u.err_resp.cmd_id,
1251 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1252 le32_to_cpu(pkt->u.err_resp.error_info));
1253 }
1254 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1255
iwl_legacy_clear_isr_stats(struct iwl_priv * priv)1256 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1257 {
1258 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1259 }
1260
iwl_legacy_mac_conf_tx(struct ieee80211_hw * hw,u16 queue,const struct ieee80211_tx_queue_params * params)1261 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1262 const struct ieee80211_tx_queue_params *params)
1263 {
1264 struct iwl_priv *priv = hw->priv;
1265 struct iwl_rxon_context *ctx;
1266 unsigned long flags;
1267 int q;
1268
1269 IWL_DEBUG_MAC80211(priv, "enter\n");
1270
1271 if (!iwl_legacy_is_ready_rf(priv)) {
1272 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1273 return -EIO;
1274 }
1275
1276 if (queue >= AC_NUM) {
1277 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1278 return 0;
1279 }
1280
1281 q = AC_NUM - 1 - queue;
1282
1283 spin_lock_irqsave(&priv->lock, flags);
1284
1285 for_each_context(priv, ctx) {
1286 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1287 cpu_to_le16(params->cw_min);
1288 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1289 cpu_to_le16(params->cw_max);
1290 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1291 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1292 cpu_to_le16((params->txop * 32));
1293
1294 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1295 }
1296
1297 spin_unlock_irqrestore(&priv->lock, flags);
1298
1299 IWL_DEBUG_MAC80211(priv, "leave\n");
1300 return 0;
1301 }
1302 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1303
iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw * hw)1304 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1305 {
1306 struct iwl_priv *priv = hw->priv;
1307
1308 return priv->ibss_manager == IWL_IBSS_MANAGER;
1309 }
1310 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1311
1312 static int
iwl_legacy_set_mode(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1313 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1314 {
1315 iwl_legacy_connection_init_rx_config(priv, ctx);
1316
1317 if (priv->cfg->ops->hcmd->set_rxon_chain)
1318 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1319
1320 return iwl_legacy_commit_rxon(priv, ctx);
1321 }
1322
iwl_legacy_setup_interface(struct iwl_priv * priv,struct iwl_rxon_context * ctx)1323 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1324 struct iwl_rxon_context *ctx)
1325 {
1326 struct ieee80211_vif *vif = ctx->vif;
1327 int err;
1328
1329 lockdep_assert_held(&priv->mutex);
1330
1331 /*
1332 * This variable will be correct only when there's just
1333 * a single context, but all code using it is for hardware
1334 * that supports only one context.
1335 */
1336 priv->iw_mode = vif->type;
1337
1338 ctx->is_active = true;
1339
1340 err = iwl_legacy_set_mode(priv, ctx);
1341 if (err) {
1342 if (!ctx->always_active)
1343 ctx->is_active = false;
1344 return err;
1345 }
1346
1347 return 0;
1348 }
1349
1350 int
iwl_legacy_mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1351 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1352 {
1353 struct iwl_priv *priv = hw->priv;
1354 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1355 struct iwl_rxon_context *tmp, *ctx = NULL;
1356 int err;
1357
1358 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1359 vif->type, vif->addr);
1360
1361 mutex_lock(&priv->mutex);
1362
1363 if (!iwl_legacy_is_ready_rf(priv)) {
1364 IWL_WARN(priv, "Try to add interface when device not ready\n");
1365 err = -EINVAL;
1366 goto out;
1367 }
1368
1369 for_each_context(priv, tmp) {
1370 u32 possible_modes =
1371 tmp->interface_modes | tmp->exclusive_interface_modes;
1372
1373 if (tmp->vif) {
1374 /* check if this busy context is exclusive */
1375 if (tmp->exclusive_interface_modes &
1376 BIT(tmp->vif->type)) {
1377 err = -EINVAL;
1378 goto out;
1379 }
1380 continue;
1381 }
1382
1383 if (!(possible_modes & BIT(vif->type)))
1384 continue;
1385
1386 /* have maybe usable context w/o interface */
1387 ctx = tmp;
1388 break;
1389 }
1390
1391 if (!ctx) {
1392 err = -EOPNOTSUPP;
1393 goto out;
1394 }
1395
1396 vif_priv->ctx = ctx;
1397 ctx->vif = vif;
1398
1399 err = iwl_legacy_setup_interface(priv, ctx);
1400 if (!err)
1401 goto out;
1402
1403 ctx->vif = NULL;
1404 priv->iw_mode = NL80211_IFTYPE_STATION;
1405 out:
1406 mutex_unlock(&priv->mutex);
1407
1408 IWL_DEBUG_MAC80211(priv, "leave\n");
1409 return err;
1410 }
1411 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1412
iwl_legacy_teardown_interface(struct iwl_priv * priv,struct ieee80211_vif * vif,bool mode_change)1413 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1414 struct ieee80211_vif *vif,
1415 bool mode_change)
1416 {
1417 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1418
1419 lockdep_assert_held(&priv->mutex);
1420
1421 if (priv->scan_vif == vif) {
1422 iwl_legacy_scan_cancel_timeout(priv, 200);
1423 iwl_legacy_force_scan_end(priv);
1424 }
1425
1426 if (!mode_change) {
1427 iwl_legacy_set_mode(priv, ctx);
1428 if (!ctx->always_active)
1429 ctx->is_active = false;
1430 }
1431 }
1432
iwl_legacy_mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1433 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1434 struct ieee80211_vif *vif)
1435 {
1436 struct iwl_priv *priv = hw->priv;
1437 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1438
1439 IWL_DEBUG_MAC80211(priv, "enter\n");
1440
1441 mutex_lock(&priv->mutex);
1442
1443 WARN_ON(ctx->vif != vif);
1444 ctx->vif = NULL;
1445
1446 iwl_legacy_teardown_interface(priv, vif, false);
1447
1448 memset(priv->bssid, 0, ETH_ALEN);
1449 mutex_unlock(&priv->mutex);
1450
1451 IWL_DEBUG_MAC80211(priv, "leave\n");
1452
1453 }
1454 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1455
iwl_legacy_alloc_txq_mem(struct iwl_priv * priv)1456 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1457 {
1458 if (!priv->txq)
1459 priv->txq = kzalloc(
1460 sizeof(struct iwl_tx_queue) *
1461 priv->cfg->base_params->num_of_queues,
1462 GFP_KERNEL);
1463 if (!priv->txq) {
1464 IWL_ERR(priv, "Not enough memory for txq\n");
1465 return -ENOMEM;
1466 }
1467 return 0;
1468 }
1469 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1470
iwl_legacy_txq_mem(struct iwl_priv * priv)1471 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1472 {
1473 kfree(priv->txq);
1474 priv->txq = NULL;
1475 }
1476 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1477
1478 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1479
1480 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1481
iwl_legacy_reset_traffic_log(struct iwl_priv * priv)1482 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1483 {
1484 priv->tx_traffic_idx = 0;
1485 priv->rx_traffic_idx = 0;
1486 if (priv->tx_traffic)
1487 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1488 if (priv->rx_traffic)
1489 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1490 }
1491
iwl_legacy_alloc_traffic_mem(struct iwl_priv * priv)1492 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1493 {
1494 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1495
1496 if (iwlegacy_debug_level & IWL_DL_TX) {
1497 if (!priv->tx_traffic) {
1498 priv->tx_traffic =
1499 kzalloc(traffic_size, GFP_KERNEL);
1500 if (!priv->tx_traffic)
1501 return -ENOMEM;
1502 }
1503 }
1504 if (iwlegacy_debug_level & IWL_DL_RX) {
1505 if (!priv->rx_traffic) {
1506 priv->rx_traffic =
1507 kzalloc(traffic_size, GFP_KERNEL);
1508 if (!priv->rx_traffic)
1509 return -ENOMEM;
1510 }
1511 }
1512 iwl_legacy_reset_traffic_log(priv);
1513 return 0;
1514 }
1515 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1516
iwl_legacy_free_traffic_mem(struct iwl_priv * priv)1517 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1518 {
1519 kfree(priv->tx_traffic);
1520 priv->tx_traffic = NULL;
1521
1522 kfree(priv->rx_traffic);
1523 priv->rx_traffic = NULL;
1524 }
1525 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1526
iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv * priv,u16 length,struct ieee80211_hdr * header)1527 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1528 u16 length, struct ieee80211_hdr *header)
1529 {
1530 __le16 fc;
1531 u16 len;
1532
1533 if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1534 return;
1535
1536 if (!priv->tx_traffic)
1537 return;
1538
1539 fc = header->frame_control;
1540 if (ieee80211_is_data(fc)) {
1541 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1542 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1543 memcpy((priv->tx_traffic +
1544 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1545 header, len);
1546 priv->tx_traffic_idx =
1547 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1548 }
1549 }
1550 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1551
iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv * priv,u16 length,struct ieee80211_hdr * header)1552 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1553 u16 length, struct ieee80211_hdr *header)
1554 {
1555 __le16 fc;
1556 u16 len;
1557
1558 if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1559 return;
1560
1561 if (!priv->rx_traffic)
1562 return;
1563
1564 fc = header->frame_control;
1565 if (ieee80211_is_data(fc)) {
1566 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1567 ? IWL_TRAFFIC_ENTRY_SIZE : length;
1568 memcpy((priv->rx_traffic +
1569 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1570 header, len);
1571 priv->rx_traffic_idx =
1572 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1573 }
1574 }
1575 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1576
iwl_legacy_get_mgmt_string(int cmd)1577 const char *iwl_legacy_get_mgmt_string(int cmd)
1578 {
1579 switch (cmd) {
1580 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1581 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1582 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1583 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1584 IWL_CMD(MANAGEMENT_PROBE_REQ);
1585 IWL_CMD(MANAGEMENT_PROBE_RESP);
1586 IWL_CMD(MANAGEMENT_BEACON);
1587 IWL_CMD(MANAGEMENT_ATIM);
1588 IWL_CMD(MANAGEMENT_DISASSOC);
1589 IWL_CMD(MANAGEMENT_AUTH);
1590 IWL_CMD(MANAGEMENT_DEAUTH);
1591 IWL_CMD(MANAGEMENT_ACTION);
1592 default:
1593 return "UNKNOWN";
1594
1595 }
1596 }
1597
iwl_legacy_get_ctrl_string(int cmd)1598 const char *iwl_legacy_get_ctrl_string(int cmd)
1599 {
1600 switch (cmd) {
1601 IWL_CMD(CONTROL_BACK_REQ);
1602 IWL_CMD(CONTROL_BACK);
1603 IWL_CMD(CONTROL_PSPOLL);
1604 IWL_CMD(CONTROL_RTS);
1605 IWL_CMD(CONTROL_CTS);
1606 IWL_CMD(CONTROL_ACK);
1607 IWL_CMD(CONTROL_CFEND);
1608 IWL_CMD(CONTROL_CFENDACK);
1609 default:
1610 return "UNKNOWN";
1611
1612 }
1613 }
1614
iwl_legacy_clear_traffic_stats(struct iwl_priv * priv)1615 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1616 {
1617 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1618 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1619 }
1620
1621 /*
1622 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1623 * iwl_legacy_update_stats function will
1624 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1625 * Use debugFs to display the rx/rx_statistics
1626 * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1627 * information will be recorded, but DATA pkt still will be recorded
1628 * for the reason of iwl_led.c need to control the led blinking based on
1629 * number of tx and rx data.
1630 *
1631 */
1632 void
iwl_legacy_update_stats(struct iwl_priv * priv,bool is_tx,__le16 fc,u16 len)1633 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1634 {
1635 struct traffic_stats *stats;
1636
1637 if (is_tx)
1638 stats = &priv->tx_stats;
1639 else
1640 stats = &priv->rx_stats;
1641
1642 if (ieee80211_is_mgmt(fc)) {
1643 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1644 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1645 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1646 break;
1647 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1648 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1649 break;
1650 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1651 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1652 break;
1653 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1654 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1655 break;
1656 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1657 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1658 break;
1659 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1660 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1661 break;
1662 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1663 stats->mgmt[MANAGEMENT_BEACON]++;
1664 break;
1665 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1666 stats->mgmt[MANAGEMENT_ATIM]++;
1667 break;
1668 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1669 stats->mgmt[MANAGEMENT_DISASSOC]++;
1670 break;
1671 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1672 stats->mgmt[MANAGEMENT_AUTH]++;
1673 break;
1674 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1675 stats->mgmt[MANAGEMENT_DEAUTH]++;
1676 break;
1677 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1678 stats->mgmt[MANAGEMENT_ACTION]++;
1679 break;
1680 }
1681 } else if (ieee80211_is_ctl(fc)) {
1682 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1683 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1684 stats->ctrl[CONTROL_BACK_REQ]++;
1685 break;
1686 case cpu_to_le16(IEEE80211_STYPE_BACK):
1687 stats->ctrl[CONTROL_BACK]++;
1688 break;
1689 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1690 stats->ctrl[CONTROL_PSPOLL]++;
1691 break;
1692 case cpu_to_le16(IEEE80211_STYPE_RTS):
1693 stats->ctrl[CONTROL_RTS]++;
1694 break;
1695 case cpu_to_le16(IEEE80211_STYPE_CTS):
1696 stats->ctrl[CONTROL_CTS]++;
1697 break;
1698 case cpu_to_le16(IEEE80211_STYPE_ACK):
1699 stats->ctrl[CONTROL_ACK]++;
1700 break;
1701 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1702 stats->ctrl[CONTROL_CFEND]++;
1703 break;
1704 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1705 stats->ctrl[CONTROL_CFENDACK]++;
1706 break;
1707 }
1708 } else {
1709 /* data */
1710 stats->data_cnt++;
1711 stats->data_bytes += len;
1712 }
1713 }
1714 EXPORT_SYMBOL(iwl_legacy_update_stats);
1715 #endif
1716
_iwl_legacy_force_rf_reset(struct iwl_priv * priv)1717 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1718 {
1719 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1720 return;
1721
1722 if (!iwl_legacy_is_any_associated(priv)) {
1723 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1724 return;
1725 }
1726 /*
1727 * There is no easy and better way to force reset the radio,
1728 * the only known method is switching channel which will force to
1729 * reset and tune the radio.
1730 * Use internal short scan (single channel) operation to should
1731 * achieve this objective.
1732 * Driver should reset the radio when number of consecutive missed
1733 * beacon, or any other uCode error condition detected.
1734 */
1735 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1736 iwl_legacy_internal_short_hw_scan(priv);
1737 }
1738
1739
iwl_legacy_force_reset(struct iwl_priv * priv,int mode,bool external)1740 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1741 {
1742 struct iwl_force_reset *force_reset;
1743
1744 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1745 return -EINVAL;
1746
1747 if (mode >= IWL_MAX_FORCE_RESET) {
1748 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1749 return -EINVAL;
1750 }
1751 force_reset = &priv->force_reset[mode];
1752 force_reset->reset_request_count++;
1753 if (!external) {
1754 if (force_reset->last_force_reset_jiffies &&
1755 time_after(force_reset->last_force_reset_jiffies +
1756 force_reset->reset_duration, jiffies)) {
1757 IWL_DEBUG_INFO(priv, "force reset rejected\n");
1758 force_reset->reset_reject_count++;
1759 return -EAGAIN;
1760 }
1761 }
1762 force_reset->reset_success_count++;
1763 force_reset->last_force_reset_jiffies = jiffies;
1764 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1765 switch (mode) {
1766 case IWL_RF_RESET:
1767 _iwl_legacy_force_rf_reset(priv);
1768 break;
1769 case IWL_FW_RESET:
1770 /*
1771 * if the request is from external(ex: debugfs),
1772 * then always perform the request in regardless the module
1773 * parameter setting
1774 * if the request is from internal (uCode error or driver
1775 * detect failure), then fw_restart module parameter
1776 * need to be check before performing firmware reload
1777 */
1778 if (!external && !priv->cfg->mod_params->restart_fw) {
1779 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1780 "module parameter setting\n");
1781 break;
1782 }
1783 IWL_ERR(priv, "On demand firmware reload\n");
1784 /* Set the FW error flag -- cleared on iwl_down */
1785 set_bit(STATUS_FW_ERROR, &priv->status);
1786 wake_up_interruptible(&priv->wait_command_queue);
1787 /*
1788 * Keep the restart process from trying to send host
1789 * commands by clearing the INIT status bit
1790 */
1791 clear_bit(STATUS_READY, &priv->status);
1792 queue_work(priv->workqueue, &priv->restart);
1793 break;
1794 }
1795 return 0;
1796 }
1797
1798 int
iwl_legacy_mac_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype newtype,bool newp2p)1799 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1800 struct ieee80211_vif *vif,
1801 enum nl80211_iftype newtype, bool newp2p)
1802 {
1803 struct iwl_priv *priv = hw->priv;
1804 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1805 struct iwl_rxon_context *tmp;
1806 u32 interface_modes;
1807 int err;
1808
1809 newtype = ieee80211_iftype_p2p(newtype, newp2p);
1810
1811 mutex_lock(&priv->mutex);
1812
1813 if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1814 /*
1815 * Huh? But wait ... this can maybe happen when
1816 * we're in the middle of a firmware restart!
1817 */
1818 err = -EBUSY;
1819 goto out;
1820 }
1821
1822 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1823
1824 if (!(interface_modes & BIT(newtype))) {
1825 err = -EBUSY;
1826 goto out;
1827 }
1828
1829 if (ctx->exclusive_interface_modes & BIT(newtype)) {
1830 for_each_context(priv, tmp) {
1831 if (ctx == tmp)
1832 continue;
1833
1834 if (!tmp->vif)
1835 continue;
1836
1837 /*
1838 * The current mode switch would be exclusive, but
1839 * another context is active ... refuse the switch.
1840 */
1841 err = -EBUSY;
1842 goto out;
1843 }
1844 }
1845
1846 /* success */
1847 iwl_legacy_teardown_interface(priv, vif, true);
1848 vif->type = newtype;
1849 vif->p2p = newp2p;
1850 err = iwl_legacy_setup_interface(priv, ctx);
1851 WARN_ON(err);
1852 /*
1853 * We've switched internally, but submitting to the
1854 * device may have failed for some reason. Mask this
1855 * error, because otherwise mac80211 will not switch
1856 * (and set the interface type back) and we'll be
1857 * out of sync with it.
1858 */
1859 err = 0;
1860
1861 out:
1862 mutex_unlock(&priv->mutex);
1863 return err;
1864 }
1865 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1866
1867 /*
1868 * On every watchdog tick we check (latest) time stamp. If it does not
1869 * change during timeout period and queue is not empty we reset firmware.
1870 */
iwl_legacy_check_stuck_queue(struct iwl_priv * priv,int cnt)1871 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1872 {
1873 struct iwl_tx_queue *txq = &priv->txq[cnt];
1874 struct iwl_queue *q = &txq->q;
1875 unsigned long timeout;
1876 int ret;
1877
1878 if (q->read_ptr == q->write_ptr) {
1879 txq->time_stamp = jiffies;
1880 return 0;
1881 }
1882
1883 timeout = txq->time_stamp +
1884 msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1885
1886 if (time_after(jiffies, timeout)) {
1887 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1888 q->id, priv->cfg->base_params->wd_timeout);
1889 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1890 return (ret == -EAGAIN) ? 0 : 1;
1891 }
1892
1893 return 0;
1894 }
1895
1896 /*
1897 * Making watchdog tick be a quarter of timeout assure we will
1898 * discover the queue hung between timeout and 1.25*timeout
1899 */
1900 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1901
1902 /*
1903 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1904 * we reset the firmware. If everything is fine just rearm the timer.
1905 */
iwl_legacy_bg_watchdog(unsigned long data)1906 void iwl_legacy_bg_watchdog(unsigned long data)
1907 {
1908 struct iwl_priv *priv = (struct iwl_priv *)data;
1909 int cnt;
1910 unsigned long timeout;
1911
1912 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1913 return;
1914
1915 timeout = priv->cfg->base_params->wd_timeout;
1916 if (timeout == 0)
1917 return;
1918
1919 /* monitor and check for stuck cmd queue */
1920 if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1921 return;
1922
1923 /* monitor and check for other stuck queues */
1924 if (iwl_legacy_is_any_associated(priv)) {
1925 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1926 /* skip as we already checked the command queue */
1927 if (cnt == priv->cmd_queue)
1928 continue;
1929 if (iwl_legacy_check_stuck_queue(priv, cnt))
1930 return;
1931 }
1932 }
1933
1934 mod_timer(&priv->watchdog, jiffies +
1935 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1936 }
1937 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1938
iwl_legacy_setup_watchdog(struct iwl_priv * priv)1939 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1940 {
1941 unsigned int timeout = priv->cfg->base_params->wd_timeout;
1942
1943 if (timeout)
1944 mod_timer(&priv->watchdog,
1945 jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1946 else
1947 del_timer(&priv->watchdog);
1948 }
1949 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1950
1951 /*
1952 * extended beacon time format
1953 * time in usec will be changed into a 32-bit value in extended:internal format
1954 * the extended part is the beacon counts
1955 * the internal part is the time in usec within one beacon interval
1956 */
1957 u32
iwl_legacy_usecs_to_beacons(struct iwl_priv * priv,u32 usec,u32 beacon_interval)1958 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1959 u32 usec, u32 beacon_interval)
1960 {
1961 u32 quot;
1962 u32 rem;
1963 u32 interval = beacon_interval * TIME_UNIT;
1964
1965 if (!interval || !usec)
1966 return 0;
1967
1968 quot = (usec / interval) &
1969 (iwl_legacy_beacon_time_mask_high(priv,
1970 priv->hw_params.beacon_time_tsf_bits) >>
1971 priv->hw_params.beacon_time_tsf_bits);
1972 rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1973 priv->hw_params.beacon_time_tsf_bits);
1974
1975 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1976 }
1977 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1978
1979 /* base is usually what we get from ucode with each received frame,
1980 * the same as HW timer counter counting down
1981 */
iwl_legacy_add_beacon_time(struct iwl_priv * priv,u32 base,u32 addon,u32 beacon_interval)1982 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1983 u32 addon, u32 beacon_interval)
1984 {
1985 u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1986 priv->hw_params.beacon_time_tsf_bits);
1987 u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1988 priv->hw_params.beacon_time_tsf_bits);
1989 u32 interval = beacon_interval * TIME_UNIT;
1990 u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1991 priv->hw_params.beacon_time_tsf_bits)) +
1992 (addon & iwl_legacy_beacon_time_mask_high(priv,
1993 priv->hw_params.beacon_time_tsf_bits));
1994
1995 if (base_low > addon_low)
1996 res += base_low - addon_low;
1997 else if (base_low < addon_low) {
1998 res += interval + base_low - addon_low;
1999 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2000 } else
2001 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2002
2003 return cpu_to_le32(res);
2004 }
2005 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
2006
2007 #ifdef CONFIG_PM
2008
iwl_legacy_pci_suspend(struct device * device)2009 int iwl_legacy_pci_suspend(struct device *device)
2010 {
2011 struct pci_dev *pdev = to_pci_dev(device);
2012 struct iwl_priv *priv = pci_get_drvdata(pdev);
2013
2014 /*
2015 * This function is called when system goes into suspend state
2016 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2017 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2018 * it will not call apm_ops.stop() to stop the DMA operation.
2019 * Calling apm_ops.stop here to make sure we stop the DMA.
2020 */
2021 iwl_legacy_apm_stop(priv);
2022
2023 return 0;
2024 }
2025 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2026
iwl_legacy_pci_resume(struct device * device)2027 int iwl_legacy_pci_resume(struct device *device)
2028 {
2029 struct pci_dev *pdev = to_pci_dev(device);
2030 struct iwl_priv *priv = pci_get_drvdata(pdev);
2031 bool hw_rfkill = false;
2032
2033 /*
2034 * We disable the RETRY_TIMEOUT register (0x41) to keep
2035 * PCI Tx retries from interfering with C3 CPU state.
2036 */
2037 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2038
2039 iwl_legacy_enable_interrupts(priv);
2040
2041 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2042 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2043 hw_rfkill = true;
2044
2045 if (hw_rfkill)
2046 set_bit(STATUS_RF_KILL_HW, &priv->status);
2047 else
2048 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2049
2050 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2051
2052 return 0;
2053 }
2054 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2055
2056 const struct dev_pm_ops iwl_legacy_pm_ops = {
2057 .suspend = iwl_legacy_pci_suspend,
2058 .resume = iwl_legacy_pci_resume,
2059 .freeze = iwl_legacy_pci_suspend,
2060 .thaw = iwl_legacy_pci_resume,
2061 .poweroff = iwl_legacy_pci_suspend,
2062 .restore = iwl_legacy_pci_resume,
2063 };
2064 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2065
2066 #endif /* CONFIG_PM */
2067
2068 static void
iwl_legacy_update_qos(struct iwl_priv * priv,struct iwl_rxon_context * ctx)2069 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2070 {
2071 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2072 return;
2073
2074 if (!ctx->is_active)
2075 return;
2076
2077 ctx->qos_data.def_qos_parm.qos_flags = 0;
2078
2079 if (ctx->qos_data.qos_active)
2080 ctx->qos_data.def_qos_parm.qos_flags |=
2081 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2082
2083 if (ctx->ht.enabled)
2084 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2085
2086 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2087 ctx->qos_data.qos_active,
2088 ctx->qos_data.def_qos_parm.qos_flags);
2089
2090 iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2091 sizeof(struct iwl_qosparam_cmd),
2092 &ctx->qos_data.def_qos_parm, NULL);
2093 }
2094
2095 /**
2096 * iwl_legacy_mac_config - mac80211 config callback
2097 */
iwl_legacy_mac_config(struct ieee80211_hw * hw,u32 changed)2098 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2099 {
2100 struct iwl_priv *priv = hw->priv;
2101 const struct iwl_channel_info *ch_info;
2102 struct ieee80211_conf *conf = &hw->conf;
2103 struct ieee80211_channel *channel = conf->channel;
2104 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2105 struct iwl_rxon_context *ctx;
2106 unsigned long flags = 0;
2107 int ret = 0;
2108 u16 ch;
2109 int scan_active = 0;
2110 bool ht_changed[NUM_IWL_RXON_CTX] = {};
2111
2112 if (WARN_ON(!priv->cfg->ops->legacy))
2113 return -EOPNOTSUPP;
2114
2115 mutex_lock(&priv->mutex);
2116
2117 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2118 channel->hw_value, changed);
2119
2120 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2121 test_bit(STATUS_SCANNING, &priv->status))) {
2122 scan_active = 1;
2123 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2124 }
2125
2126 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2127 IEEE80211_CONF_CHANGE_CHANNEL)) {
2128 /* mac80211 uses static for non-HT which is what we want */
2129 priv->current_ht_config.smps = conf->smps_mode;
2130
2131 /*
2132 * Recalculate chain counts.
2133 *
2134 * If monitor mode is enabled then mac80211 will
2135 * set up the SM PS mode to OFF if an HT channel is
2136 * configured.
2137 */
2138 if (priv->cfg->ops->hcmd->set_rxon_chain)
2139 for_each_context(priv, ctx)
2140 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2141 }
2142
2143 /* during scanning mac80211 will delay channel setting until
2144 * scan finish with changed = 0
2145 */
2146 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2147 if (scan_active)
2148 goto set_ch_out;
2149
2150 ch = channel->hw_value;
2151 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2152 if (!iwl_legacy_is_channel_valid(ch_info)) {
2153 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2154 ret = -EINVAL;
2155 goto set_ch_out;
2156 }
2157
2158 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2159 !iwl_legacy_is_channel_ibss(ch_info)) {
2160 IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2161 ret = -EINVAL;
2162 goto set_ch_out;
2163 }
2164
2165 spin_lock_irqsave(&priv->lock, flags);
2166
2167 for_each_context(priv, ctx) {
2168 /* Configure HT40 channels */
2169 if (ctx->ht.enabled != conf_is_ht(conf)) {
2170 ctx->ht.enabled = conf_is_ht(conf);
2171 ht_changed[ctx->ctxid] = true;
2172 }
2173 if (ctx->ht.enabled) {
2174 if (conf_is_ht40_minus(conf)) {
2175 ctx->ht.extension_chan_offset =
2176 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2177 ctx->ht.is_40mhz = true;
2178 } else if (conf_is_ht40_plus(conf)) {
2179 ctx->ht.extension_chan_offset =
2180 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2181 ctx->ht.is_40mhz = true;
2182 } else {
2183 ctx->ht.extension_chan_offset =
2184 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2185 ctx->ht.is_40mhz = false;
2186 }
2187 } else
2188 ctx->ht.is_40mhz = false;
2189
2190 /*
2191 * Default to no protection. Protection mode will
2192 * later be set from BSS config in iwl_ht_conf
2193 */
2194 ctx->ht.protection =
2195 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2196
2197 /* if we are switching from ht to 2.4 clear flags
2198 * from any ht related info since 2.4 does not
2199 * support ht */
2200 if ((le16_to_cpu(ctx->staging.channel) != ch))
2201 ctx->staging.flags = 0;
2202
2203 iwl_legacy_set_rxon_channel(priv, channel, ctx);
2204 iwl_legacy_set_rxon_ht(priv, ht_conf);
2205
2206 iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2207 ctx->vif);
2208 }
2209
2210 spin_unlock_irqrestore(&priv->lock, flags);
2211
2212 if (priv->cfg->ops->legacy->update_bcast_stations)
2213 ret =
2214 priv->cfg->ops->legacy->update_bcast_stations(priv);
2215
2216 set_ch_out:
2217 /* The list of supported rates and rate mask can be different
2218 * for each band; since the band may have changed, reset
2219 * the rate mask to what mac80211 lists */
2220 iwl_legacy_set_rate(priv);
2221 }
2222
2223 if (changed & (IEEE80211_CONF_CHANGE_PS |
2224 IEEE80211_CONF_CHANGE_IDLE)) {
2225 ret = iwl_legacy_power_update_mode(priv, false);
2226 if (ret)
2227 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2228 }
2229
2230 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2231 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2232 priv->tx_power_user_lmt, conf->power_level);
2233
2234 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2235 }
2236
2237 if (!iwl_legacy_is_ready(priv)) {
2238 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2239 goto out;
2240 }
2241
2242 if (scan_active)
2243 goto out;
2244
2245 for_each_context(priv, ctx) {
2246 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2247 iwl_legacy_commit_rxon(priv, ctx);
2248 else
2249 IWL_DEBUG_INFO(priv,
2250 "Not re-sending same RXON configuration.\n");
2251 if (ht_changed[ctx->ctxid])
2252 iwl_legacy_update_qos(priv, ctx);
2253 }
2254
2255 out:
2256 IWL_DEBUG_MAC80211(priv, "leave\n");
2257 mutex_unlock(&priv->mutex);
2258 return ret;
2259 }
2260 EXPORT_SYMBOL(iwl_legacy_mac_config);
2261
iwl_legacy_mac_reset_tsf(struct ieee80211_hw * hw)2262 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2263 {
2264 struct iwl_priv *priv = hw->priv;
2265 unsigned long flags;
2266 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2267 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2268
2269 if (WARN_ON(!priv->cfg->ops->legacy))
2270 return;
2271
2272 mutex_lock(&priv->mutex);
2273 IWL_DEBUG_MAC80211(priv, "enter\n");
2274
2275 spin_lock_irqsave(&priv->lock, flags);
2276 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2277 spin_unlock_irqrestore(&priv->lock, flags);
2278
2279 spin_lock_irqsave(&priv->lock, flags);
2280
2281 /* new association get rid of ibss beacon skb */
2282 if (priv->beacon_skb)
2283 dev_kfree_skb(priv->beacon_skb);
2284
2285 priv->beacon_skb = NULL;
2286
2287 priv->timestamp = 0;
2288
2289 spin_unlock_irqrestore(&priv->lock, flags);
2290
2291 iwl_legacy_scan_cancel_timeout(priv, 100);
2292 if (!iwl_legacy_is_ready_rf(priv)) {
2293 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2294 mutex_unlock(&priv->mutex);
2295 return;
2296 }
2297
2298 /* we are restarting association process
2299 * clear RXON_FILTER_ASSOC_MSK bit
2300 */
2301 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2302 iwl_legacy_commit_rxon(priv, ctx);
2303
2304 iwl_legacy_set_rate(priv);
2305
2306 mutex_unlock(&priv->mutex);
2307
2308 IWL_DEBUG_MAC80211(priv, "leave\n");
2309 }
2310 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2311
iwl_legacy_ht_conf(struct iwl_priv * priv,struct ieee80211_vif * vif)2312 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2313 struct ieee80211_vif *vif)
2314 {
2315 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2316 struct ieee80211_sta *sta;
2317 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2318 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2319
2320 IWL_DEBUG_ASSOC(priv, "enter:\n");
2321
2322 if (!ctx->ht.enabled)
2323 return;
2324
2325 ctx->ht.protection =
2326 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2327 ctx->ht.non_gf_sta_present =
2328 !!(bss_conf->ht_operation_mode &
2329 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2330
2331 ht_conf->single_chain_sufficient = false;
2332
2333 switch (vif->type) {
2334 case NL80211_IFTYPE_STATION:
2335 rcu_read_lock();
2336 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2337 if (sta) {
2338 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2339 int maxstreams;
2340
2341 maxstreams = (ht_cap->mcs.tx_params &
2342 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2343 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2344 maxstreams += 1;
2345
2346 if ((ht_cap->mcs.rx_mask[1] == 0) &&
2347 (ht_cap->mcs.rx_mask[2] == 0))
2348 ht_conf->single_chain_sufficient = true;
2349 if (maxstreams <= 1)
2350 ht_conf->single_chain_sufficient = true;
2351 } else {
2352 /*
2353 * If at all, this can only happen through a race
2354 * when the AP disconnects us while we're still
2355 * setting up the connection, in that case mac80211
2356 * will soon tell us about that.
2357 */
2358 ht_conf->single_chain_sufficient = true;
2359 }
2360 rcu_read_unlock();
2361 break;
2362 case NL80211_IFTYPE_ADHOC:
2363 ht_conf->single_chain_sufficient = true;
2364 break;
2365 default:
2366 break;
2367 }
2368
2369 IWL_DEBUG_ASSOC(priv, "leave\n");
2370 }
2371
iwl_legacy_set_no_assoc(struct iwl_priv * priv,struct ieee80211_vif * vif)2372 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2373 struct ieee80211_vif *vif)
2374 {
2375 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2376
2377 /*
2378 * inform the ucode that there is no longer an
2379 * association and that no more packets should be
2380 * sent
2381 */
2382 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2383 ctx->staging.assoc_id = 0;
2384 iwl_legacy_commit_rxon(priv, ctx);
2385 }
2386
iwl_legacy_beacon_update(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2387 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2388 struct ieee80211_vif *vif)
2389 {
2390 struct iwl_priv *priv = hw->priv;
2391 unsigned long flags;
2392 __le64 timestamp;
2393 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2394
2395 if (!skb)
2396 return;
2397
2398 IWL_DEBUG_MAC80211(priv, "enter\n");
2399
2400 lockdep_assert_held(&priv->mutex);
2401
2402 if (!priv->beacon_ctx) {
2403 IWL_ERR(priv, "update beacon but no beacon context!\n");
2404 dev_kfree_skb(skb);
2405 return;
2406 }
2407
2408 spin_lock_irqsave(&priv->lock, flags);
2409
2410 if (priv->beacon_skb)
2411 dev_kfree_skb(priv->beacon_skb);
2412
2413 priv->beacon_skb = skb;
2414
2415 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2416 priv->timestamp = le64_to_cpu(timestamp);
2417
2418 IWL_DEBUG_MAC80211(priv, "leave\n");
2419 spin_unlock_irqrestore(&priv->lock, flags);
2420
2421 if (!iwl_legacy_is_ready_rf(priv)) {
2422 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2423 return;
2424 }
2425
2426 priv->cfg->ops->legacy->post_associate(priv);
2427 }
2428
iwl_legacy_mac_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changes)2429 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2430 struct ieee80211_vif *vif,
2431 struct ieee80211_bss_conf *bss_conf,
2432 u32 changes)
2433 {
2434 struct iwl_priv *priv = hw->priv;
2435 struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2436 int ret;
2437
2438 if (WARN_ON(!priv->cfg->ops->legacy))
2439 return;
2440
2441 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2442
2443 if (!iwl_legacy_is_alive(priv))
2444 return;
2445
2446 mutex_lock(&priv->mutex);
2447
2448 if (changes & BSS_CHANGED_QOS) {
2449 unsigned long flags;
2450
2451 spin_lock_irqsave(&priv->lock, flags);
2452 ctx->qos_data.qos_active = bss_conf->qos;
2453 iwl_legacy_update_qos(priv, ctx);
2454 spin_unlock_irqrestore(&priv->lock, flags);
2455 }
2456
2457 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2458 /*
2459 * the add_interface code must make sure we only ever
2460 * have a single interface that could be beaconing at
2461 * any time.
2462 */
2463 if (vif->bss_conf.enable_beacon)
2464 priv->beacon_ctx = ctx;
2465 else
2466 priv->beacon_ctx = NULL;
2467 }
2468
2469 if (changes & BSS_CHANGED_BSSID) {
2470 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2471
2472 /*
2473 * If there is currently a HW scan going on in the
2474 * background then we need to cancel it else the RXON
2475 * below/in post_associate will fail.
2476 */
2477 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2478 IWL_WARN(priv,
2479 "Aborted scan still in progress after 100ms\n");
2480 IWL_DEBUG_MAC80211(priv,
2481 "leaving - scan abort failed.\n");
2482 mutex_unlock(&priv->mutex);
2483 return;
2484 }
2485
2486 /* mac80211 only sets assoc when in STATION mode */
2487 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2488 memcpy(ctx->staging.bssid_addr,
2489 bss_conf->bssid, ETH_ALEN);
2490
2491 /* currently needed in a few places */
2492 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2493 } else {
2494 ctx->staging.filter_flags &=
2495 ~RXON_FILTER_ASSOC_MSK;
2496 }
2497
2498 }
2499
2500 /*
2501 * This needs to be after setting the BSSID in case
2502 * mac80211 decides to do both changes at once because
2503 * it will invoke post_associate.
2504 */
2505 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2506 iwl_legacy_beacon_update(hw, vif);
2507
2508 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2509 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2510 bss_conf->use_short_preamble);
2511 if (bss_conf->use_short_preamble)
2512 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2513 else
2514 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2515 }
2516
2517 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2518 IWL_DEBUG_MAC80211(priv,
2519 "ERP_CTS %d\n", bss_conf->use_cts_prot);
2520 if (bss_conf->use_cts_prot &&
2521 (priv->band != IEEE80211_BAND_5GHZ))
2522 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2523 else
2524 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2525 if (bss_conf->use_cts_prot)
2526 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2527 else
2528 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2529 }
2530
2531 if (changes & BSS_CHANGED_BASIC_RATES) {
2532 /* XXX use this information
2533 *
2534 * To do that, remove code from iwl_legacy_set_rate() and put something
2535 * like this here:
2536 *
2537 if (A-band)
2538 ctx->staging.ofdm_basic_rates =
2539 bss_conf->basic_rates;
2540 else
2541 ctx->staging.ofdm_basic_rates =
2542 bss_conf->basic_rates >> 4;
2543 ctx->staging.cck_basic_rates =
2544 bss_conf->basic_rates & 0xF;
2545 */
2546 }
2547
2548 if (changes & BSS_CHANGED_HT) {
2549 iwl_legacy_ht_conf(priv, vif);
2550
2551 if (priv->cfg->ops->hcmd->set_rxon_chain)
2552 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2553 }
2554
2555 if (changes & BSS_CHANGED_ASSOC) {
2556 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2557 if (bss_conf->assoc) {
2558 priv->timestamp = bss_conf->timestamp;
2559
2560 if (!iwl_legacy_is_rfkill(priv))
2561 priv->cfg->ops->legacy->post_associate(priv);
2562 } else
2563 iwl_legacy_set_no_assoc(priv, vif);
2564 }
2565
2566 if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2567 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2568 changes);
2569 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2570 if (!ret) {
2571 /* Sync active_rxon with latest change. */
2572 memcpy((void *)&ctx->active,
2573 &ctx->staging,
2574 sizeof(struct iwl_legacy_rxon_cmd));
2575 }
2576 }
2577
2578 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2579 if (vif->bss_conf.enable_beacon) {
2580 memcpy(ctx->staging.bssid_addr,
2581 bss_conf->bssid, ETH_ALEN);
2582 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2583 priv->cfg->ops->legacy->config_ap(priv);
2584 } else
2585 iwl_legacy_set_no_assoc(priv, vif);
2586 }
2587
2588 if (changes & BSS_CHANGED_IBSS) {
2589 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2590 bss_conf->ibss_joined);
2591 if (ret)
2592 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2593 bss_conf->ibss_joined ? "add" : "remove",
2594 bss_conf->bssid);
2595 }
2596
2597 mutex_unlock(&priv->mutex);
2598
2599 IWL_DEBUG_MAC80211(priv, "leave\n");
2600 }
2601 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2602
iwl_legacy_isr(int irq,void * data)2603 irqreturn_t iwl_legacy_isr(int irq, void *data)
2604 {
2605 struct iwl_priv *priv = data;
2606 u32 inta, inta_mask;
2607 u32 inta_fh;
2608 unsigned long flags;
2609 if (!priv)
2610 return IRQ_NONE;
2611
2612 spin_lock_irqsave(&priv->lock, flags);
2613
2614 /* Disable (but don't clear!) interrupts here to avoid
2615 * back-to-back ISRs and sporadic interrupts from our NIC.
2616 * If we have something to service, the tasklet will re-enable ints.
2617 * If we *don't* have something, we'll re-enable before leaving here. */
2618 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
2619 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2620
2621 /* Discover which interrupts are active/pending */
2622 inta = iwl_read32(priv, CSR_INT);
2623 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2624
2625 /* Ignore interrupt if there's nothing in NIC to service.
2626 * This may be due to IRQ shared with another device,
2627 * or due to sporadic interrupts thrown from our NIC. */
2628 if (!inta && !inta_fh) {
2629 IWL_DEBUG_ISR(priv,
2630 "Ignore interrupt, inta == 0, inta_fh == 0\n");
2631 goto none;
2632 }
2633
2634 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2635 /* Hardware disappeared. It might have already raised
2636 * an interrupt */
2637 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2638 goto unplugged;
2639 }
2640
2641 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2642 inta, inta_mask, inta_fh);
2643
2644 inta &= ~CSR_INT_BIT_SCD;
2645
2646 /* iwl_irq_tasklet() will service interrupts and re-enable them */
2647 if (likely(inta || inta_fh))
2648 tasklet_schedule(&priv->irq_tasklet);
2649
2650 unplugged:
2651 spin_unlock_irqrestore(&priv->lock, flags);
2652 return IRQ_HANDLED;
2653
2654 none:
2655 /* re-enable interrupts here since we don't have anything to service. */
2656 /* only Re-enable if diabled by irq */
2657 if (test_bit(STATUS_INT_ENABLED, &priv->status))
2658 iwl_legacy_enable_interrupts(priv);
2659 spin_unlock_irqrestore(&priv->lock, flags);
2660 return IRQ_NONE;
2661 }
2662 EXPORT_SYMBOL(iwl_legacy_isr);
2663
2664 /*
2665 * iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2666 * function.
2667 */
iwl_legacy_tx_cmd_protection(struct iwl_priv * priv,struct ieee80211_tx_info * info,__le16 fc,__le32 * tx_flags)2668 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2669 struct ieee80211_tx_info *info,
2670 __le16 fc, __le32 *tx_flags)
2671 {
2672 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2673 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2674 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2675 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2676
2677 if (!ieee80211_is_mgmt(fc))
2678 return;
2679
2680 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2681 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2682 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2683 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2684 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2685 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2686 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2687 break;
2688 }
2689 } else if (info->control.rates[0].flags &
2690 IEEE80211_TX_RC_USE_CTS_PROTECT) {
2691 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2692 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2693 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2694 }
2695 }
2696 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);
2697