1 /******************************************************************************
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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.
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.
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,
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
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 *****************************************************************************/
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>
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h" /* FIXME: remove */
38 #include "iwl-debug.h"
41 #include "iwl-power.h"
43 #include "iwl-helpers.h"
46 MODULE_DESCRIPTION("iwl core");
47 MODULE_VERSION(IWLWIFI_VERSION);
48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
49 MODULE_LICENSE("GPL");
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
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"
65 * default: bt_coex_active = true (BT_COEX_ENABLE)
67 bool bt_coex_active = true;
68 EXPORT_SYMBOL_GPL(bt_coex_active);
69 module_param(bt_coex_active, bool, S_IRUGO);
70 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
73 EXPORT_SYMBOL(iwl_debug_level);
75 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
76 EXPORT_SYMBOL(iwl_bcast_addr);
79 /* This function both allocates and initializes hw and priv. */
80 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
81 struct ieee80211_ops *hw_ops)
83 struct iwl_priv *priv;
85 /* mac80211 allocates memory for this device instance, including
86 * space for this driver's private structure */
87 struct ieee80211_hw *hw =
88 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
90 pr_err("%s: Can not allocate network device\n",
101 EXPORT_SYMBOL(iwl_alloc_all);
106 static void iwl_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
108 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
114 ctx->qos_data.def_qos_parm.qos_flags = 0;
116 if (ctx->qos_data.qos_active)
117 ctx->qos_data.def_qos_parm.qos_flags |=
118 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
121 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
123 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
124 ctx->qos_data.qos_active,
125 ctx->qos_data.def_qos_parm.qos_flags);
127 iwl_send_cmd_pdu_async(priv, ctx->qos_cmd,
128 sizeof(struct iwl_qosparam_cmd),
129 &ctx->qos_data.def_qos_parm, NULL);
132 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
133 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
134 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
135 struct ieee80211_sta_ht_cap *ht_info,
136 enum ieee80211_band band)
138 u16 max_bit_rate = 0;
139 u8 rx_chains_num = priv->hw_params.rx_chains_num;
140 u8 tx_chains_num = priv->hw_params.tx_chains_num;
143 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
145 ht_info->ht_supported = true;
147 if (priv->cfg->ht_params &&
148 priv->cfg->ht_params->ht_greenfield_support)
149 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
150 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
151 max_bit_rate = MAX_BIT_RATE_20_MHZ;
152 if (priv->hw_params.ht40_channel & BIT(band)) {
153 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
154 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
155 ht_info->mcs.rx_mask[4] = 0x01;
156 max_bit_rate = MAX_BIT_RATE_40_MHZ;
159 if (priv->cfg->mod_params->amsdu_size_8K)
160 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
162 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
163 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
164 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
165 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
166 if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
167 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
169 ht_info->mcs.rx_mask[0] = 0xFF;
170 if (rx_chains_num >= 2)
171 ht_info->mcs.rx_mask[1] = 0xFF;
172 if (rx_chains_num >= 3)
173 ht_info->mcs.rx_mask[2] = 0xFF;
175 /* Highest supported Rx data rate */
176 max_bit_rate *= rx_chains_num;
177 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
178 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
180 /* Tx MCS capabilities */
181 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
182 if (tx_chains_num != rx_chains_num) {
183 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
184 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
185 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
190 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
192 int iwlcore_init_geos(struct iwl_priv *priv)
194 struct iwl_channel_info *ch;
195 struct ieee80211_supported_band *sband;
196 struct ieee80211_channel *channels;
197 struct ieee80211_channel *geo_ch;
198 struct ieee80211_rate *rates;
201 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
202 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
203 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
204 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
208 channels = kzalloc(sizeof(struct ieee80211_channel) *
209 priv->channel_count, GFP_KERNEL);
213 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
220 /* 5.2GHz channels start after the 2.4GHz channels */
221 sband = &priv->bands[IEEE80211_BAND_5GHZ];
222 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
224 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
225 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
227 if (priv->cfg->sku & IWL_SKU_N)
228 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
229 IEEE80211_BAND_5GHZ);
231 sband = &priv->bands[IEEE80211_BAND_2GHZ];
232 sband->channels = channels;
234 sband->bitrates = rates;
235 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
237 if (priv->cfg->sku & IWL_SKU_N)
238 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
239 IEEE80211_BAND_2GHZ);
241 priv->ieee_channels = channels;
242 priv->ieee_rates = rates;
244 for (i = 0; i < priv->channel_count; i++) {
245 ch = &priv->channel_info[i];
247 /* FIXME: might be removed if scan is OK */
248 if (!is_channel_valid(ch))
251 if (is_channel_a_band(ch))
252 sband = &priv->bands[IEEE80211_BAND_5GHZ];
254 sband = &priv->bands[IEEE80211_BAND_2GHZ];
256 geo_ch = &sband->channels[sband->n_channels++];
258 geo_ch->center_freq =
259 ieee80211_channel_to_frequency(ch->channel);
260 geo_ch->max_power = ch->max_power_avg;
261 geo_ch->max_antenna_gain = 0xff;
262 geo_ch->hw_value = ch->channel;
264 if (is_channel_valid(ch)) {
265 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
266 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
268 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
269 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
271 if (ch->flags & EEPROM_CHANNEL_RADAR)
272 geo_ch->flags |= IEEE80211_CHAN_RADAR;
274 geo_ch->flags |= ch->ht40_extension_channel;
276 if (ch->max_power_avg > priv->tx_power_device_lmt)
277 priv->tx_power_device_lmt = ch->max_power_avg;
279 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
282 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
283 ch->channel, geo_ch->center_freq,
284 is_channel_a_band(ch) ? "5.2" : "2.4",
285 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
286 "restricted" : "valid",
290 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
291 priv->cfg->sku & IWL_SKU_A) {
292 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
293 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
294 priv->pci_dev->device,
295 priv->pci_dev->subsystem_device);
296 priv->cfg->sku &= ~IWL_SKU_A;
299 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
300 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
301 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
303 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
307 EXPORT_SYMBOL(iwlcore_init_geos);
310 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
312 void iwlcore_free_geos(struct iwl_priv *priv)
314 kfree(priv->ieee_channels);
315 kfree(priv->ieee_rates);
316 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
318 EXPORT_SYMBOL(iwlcore_free_geos);
321 * iwlcore_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
324 void iwlcore_tx_cmd_protection(struct iwl_priv *priv,
325 struct ieee80211_tx_info *info,
326 __le16 fc, __le32 *tx_flags)
328 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
329 *tx_flags |= TX_CMD_FLG_RTS_MSK;
330 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
331 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
333 if (!ieee80211_is_mgmt(fc))
336 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
337 case cpu_to_le16(IEEE80211_STYPE_AUTH):
338 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
339 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
340 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
341 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
342 *tx_flags |= TX_CMD_FLG_CTS_MSK;
345 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
346 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
347 *tx_flags |= TX_CMD_FLG_CTS_MSK;
348 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
351 EXPORT_SYMBOL(iwlcore_tx_cmd_protection);
354 static bool iwl_is_channel_extension(struct iwl_priv *priv,
355 enum ieee80211_band band,
356 u16 channel, u8 extension_chan_offset)
358 const struct iwl_channel_info *ch_info;
360 ch_info = iwl_get_channel_info(priv, band, channel);
361 if (!is_channel_valid(ch_info))
364 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
365 return !(ch_info->ht40_extension_channel &
366 IEEE80211_CHAN_NO_HT40PLUS);
367 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
368 return !(ch_info->ht40_extension_channel &
369 IEEE80211_CHAN_NO_HT40MINUS);
374 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
375 struct iwl_rxon_context *ctx,
376 struct ieee80211_sta_ht_cap *ht_cap)
378 if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
382 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
383 * the bit will not set if it is pure 40MHz case
385 if (ht_cap && !ht_cap->ht_supported)
388 #ifdef CONFIG_IWLWIFI_DEBUGFS
389 if (priv->disable_ht40)
393 return iwl_is_channel_extension(priv, priv->band,
394 le16_to_cpu(ctx->staging.channel),
395 ctx->ht.extension_chan_offset);
397 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
399 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
405 * If mac80211 hasn't given us a beacon interval, program
406 * the default into the device (not checking this here
407 * would cause the adjustment below to return the maximum
408 * value, which may break PAN.)
411 return DEFAULT_BEACON_INTERVAL;
414 * If the beacon interval we obtained from the peer
415 * is too large, we'll have to wake up more often
416 * (and in IBSS case, we'll beacon too much)
418 * For example, if max_beacon_val is 4096, and the
419 * requested beacon interval is 7000, we'll have to
420 * use 3500 to be able to wake up on the beacons.
422 * This could badly influence beacon detection stats.
425 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
426 new_val = beacon_val / beacon_factor;
429 new_val = max_beacon_val;
434 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
437 s32 interval_tm, rem;
438 struct ieee80211_conf *conf = NULL;
440 struct ieee80211_vif *vif = ctx->vif;
442 conf = ieee80211_get_hw_conf(priv->hw);
444 lockdep_assert_held(&priv->mutex);
446 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
448 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
449 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
451 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
454 * TODO: For IBSS we need to get atim_window from mac80211,
455 * for now just always use 0
457 ctx->timing.atim_window = 0;
459 if (ctx->ctxid == IWL_RXON_CTX_PAN &&
460 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
461 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
462 priv->contexts[IWL_RXON_CTX_BSS].vif &&
463 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
464 ctx->timing.beacon_interval =
465 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
466 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
467 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
468 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
469 priv->contexts[IWL_RXON_CTX_PAN].vif &&
470 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
471 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
472 !ctx->vif->bss_conf.beacon_int)) {
473 ctx->timing.beacon_interval =
474 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
475 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
477 beacon_int = iwl_adjust_beacon_interval(beacon_int,
478 priv->hw_params.max_beacon_itrvl * TIME_UNIT);
479 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
482 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
483 interval_tm = beacon_int * TIME_UNIT;
484 rem = do_div(tsf, interval_tm);
485 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
487 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
489 IWL_DEBUG_ASSOC(priv,
490 "beacon interval %d beacon timer %d beacon tim %d\n",
491 le16_to_cpu(ctx->timing.beacon_interval),
492 le32_to_cpu(ctx->timing.beacon_init_val),
493 le16_to_cpu(ctx->timing.atim_window));
495 return iwl_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
496 sizeof(ctx->timing), &ctx->timing);
498 EXPORT_SYMBOL(iwl_send_rxon_timing);
500 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
503 struct iwl_rxon_cmd *rxon = &ctx->staging;
506 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
508 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
511 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
513 /* validate RXON structure is valid */
514 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
516 struct iwl_rxon_cmd *rxon = &ctx->staging;
519 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
520 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
521 IWL_WARN(priv, "check 2.4G: wrong narrow\n");
524 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
525 IWL_WARN(priv, "check 2.4G: wrong radar\n");
529 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
530 IWL_WARN(priv, "check 5.2G: not short slot!\n");
533 if (rxon->flags & RXON_FLG_CCK_MSK) {
534 IWL_WARN(priv, "check 5.2G: CCK!\n");
538 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
539 IWL_WARN(priv, "mac/bssid mcast!\n");
543 /* make sure basic rates 6Mbps and 1Mbps are supported */
544 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
545 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
546 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
550 if (le16_to_cpu(rxon->assoc_id) > 2007) {
551 IWL_WARN(priv, "aid > 2007\n");
555 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
556 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
557 IWL_WARN(priv, "CCK and short slot\n");
561 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
562 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
563 IWL_WARN(priv, "CCK and auto detect");
567 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
568 RXON_FLG_TGG_PROTECT_MSK)) ==
569 RXON_FLG_TGG_PROTECT_MSK) {
570 IWL_WARN(priv, "TGg but no auto-detect\n");
575 IWL_WARN(priv, "Tuning to channel %d\n",
576 le16_to_cpu(rxon->channel));
579 IWL_ERR(priv, "Invalid RXON\n");
584 EXPORT_SYMBOL(iwl_check_rxon_cmd);
587 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
588 * @priv: staging_rxon is compared to active_rxon
590 * If the RXON structure is changing enough to require a new tune,
591 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
592 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
594 int iwl_full_rxon_required(struct iwl_priv *priv,
595 struct iwl_rxon_context *ctx)
597 const struct iwl_rxon_cmd *staging = &ctx->staging;
598 const struct iwl_rxon_cmd *active = &ctx->active;
602 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
606 #define CHK_NEQ(c1, c2) \
607 if ((c1) != (c2)) { \
608 IWL_DEBUG_INFO(priv, "need full RXON - " \
609 #c1 " != " #c2 " - %d != %d\n", \
614 /* These items are only settable from the full RXON command */
615 CHK(!iwl_is_associated_ctx(ctx));
616 CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
617 CHK(compare_ether_addr(staging->node_addr, active->node_addr));
618 CHK(compare_ether_addr(staging->wlap_bssid_addr,
619 active->wlap_bssid_addr));
620 CHK_NEQ(staging->dev_type, active->dev_type);
621 CHK_NEQ(staging->channel, active->channel);
622 CHK_NEQ(staging->air_propagation, active->air_propagation);
623 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
624 active->ofdm_ht_single_stream_basic_rates);
625 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
626 active->ofdm_ht_dual_stream_basic_rates);
627 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
628 active->ofdm_ht_triple_stream_basic_rates);
629 CHK_NEQ(staging->assoc_id, active->assoc_id);
631 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
632 * be updated with the RXON_ASSOC command -- however only some
633 * flag transitions are allowed using RXON_ASSOC */
635 /* Check if we are not switching bands */
636 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
637 active->flags & RXON_FLG_BAND_24G_MSK);
639 /* Check if we are switching association toggle */
640 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
641 active->filter_flags & RXON_FILTER_ASSOC_MSK);
648 EXPORT_SYMBOL(iwl_full_rxon_required);
650 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
651 struct iwl_rxon_context *ctx)
654 * Assign the lowest rate -- should really get this from
655 * the beacon skb from mac80211.
657 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
658 return IWL_RATE_1M_PLCP;
660 return IWL_RATE_6M_PLCP;
662 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
664 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
665 struct iwl_ht_config *ht_conf,
666 struct iwl_rxon_context *ctx)
668 struct iwl_rxon_cmd *rxon = &ctx->staging;
670 if (!ctx->ht.enabled) {
671 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
672 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
673 RXON_FLG_HT40_PROT_MSK |
674 RXON_FLG_HT_PROT_MSK);
678 /* FIXME: if the definition of ht.protection changed, the "translation"
679 * will be needed for rxon->flags
681 rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
683 /* Set up channel bandwidth:
684 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
685 /* clear the HT channel mode before set the mode */
686 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
687 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
688 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
690 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
691 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
692 /* Note: control channel is opposite of extension channel */
693 switch (ctx->ht.extension_chan_offset) {
694 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
695 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
697 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
698 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
702 /* Note: control channel is opposite of extension channel */
703 switch (ctx->ht.extension_chan_offset) {
704 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
705 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
706 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
708 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
709 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
710 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
712 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
714 /* channel location only valid if in Mixed mode */
715 IWL_ERR(priv, "invalid extension channel offset\n");
720 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
723 if (priv->cfg->ops->hcmd->set_rxon_chain)
724 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
726 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
727 "extension channel offset 0x%x\n",
728 le32_to_cpu(rxon->flags), ctx->ht.protection,
729 ctx->ht.extension_chan_offset);
732 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
734 struct iwl_rxon_context *ctx;
736 for_each_context(priv, ctx)
737 _iwl_set_rxon_ht(priv, ht_conf, ctx);
739 EXPORT_SYMBOL(iwl_set_rxon_ht);
741 /* Return valid, unused, channel for a passive scan to reset the RF */
742 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
743 enum ieee80211_band band)
745 const struct iwl_channel_info *ch_info;
749 struct iwl_rxon_context *ctx;
751 if (band == IEEE80211_BAND_5GHZ) {
753 max = priv->channel_count;
759 for (i = min; i < max; i++) {
762 for_each_context(priv, ctx) {
763 busy = priv->channel_info[i].channel ==
764 le16_to_cpu(ctx->staging.channel);
772 channel = priv->channel_info[i].channel;
773 ch_info = iwl_get_channel_info(priv, band, channel);
774 if (is_channel_valid(ch_info))
780 EXPORT_SYMBOL(iwl_get_single_channel_number);
783 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
784 * @ch: requested channel as a pointer to struct ieee80211_channel
786 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
787 * in the staging RXON flag structure based on the ch->band
789 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
790 struct iwl_rxon_context *ctx)
792 enum ieee80211_band band = ch->band;
793 u16 channel = ch->hw_value;
795 if ((le16_to_cpu(ctx->staging.channel) == channel) &&
796 (priv->band == band))
799 ctx->staging.channel = cpu_to_le16(channel);
800 if (band == IEEE80211_BAND_5GHZ)
801 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
803 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
807 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
811 EXPORT_SYMBOL(iwl_set_rxon_channel);
813 void iwl_set_flags_for_band(struct iwl_priv *priv,
814 struct iwl_rxon_context *ctx,
815 enum ieee80211_band band,
816 struct ieee80211_vif *vif)
818 if (band == IEEE80211_BAND_5GHZ) {
819 ctx->staging.flags &=
820 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
822 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
824 /* Copied from iwl_post_associate() */
825 if (vif && vif->bss_conf.use_short_slot)
826 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
828 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
830 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
831 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
832 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
835 EXPORT_SYMBOL(iwl_set_flags_for_band);
838 * initialize rxon structure with default values from eeprom
840 void iwl_connection_init_rx_config(struct iwl_priv *priv,
841 struct iwl_rxon_context *ctx)
843 const struct iwl_channel_info *ch_info;
845 memset(&ctx->staging, 0, sizeof(ctx->staging));
848 ctx->staging.dev_type = ctx->unused_devtype;
849 } else switch (ctx->vif->type) {
850 case NL80211_IFTYPE_AP:
851 ctx->staging.dev_type = ctx->ap_devtype;
854 case NL80211_IFTYPE_STATION:
855 ctx->staging.dev_type = ctx->station_devtype;
856 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
859 case NL80211_IFTYPE_ADHOC:
860 ctx->staging.dev_type = ctx->ibss_devtype;
861 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
862 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
863 RXON_FILTER_ACCEPT_GRP_MSK;
867 IWL_ERR(priv, "Unsupported interface type %d\n",
873 /* TODO: Figure out when short_preamble would be set and cache from
875 if (!hw_to_local(priv->hw)->short_preamble)
876 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
878 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
881 ch_info = iwl_get_channel_info(priv, priv->band,
882 le16_to_cpu(ctx->active.channel));
885 ch_info = &priv->channel_info[0];
887 ctx->staging.channel = cpu_to_le16(ch_info->channel);
888 priv->band = ch_info->band;
890 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
892 ctx->staging.ofdm_basic_rates =
893 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
894 ctx->staging.cck_basic_rates =
895 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
897 /* clear both MIX and PURE40 mode flag */
898 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
899 RXON_FLG_CHANNEL_MODE_PURE_40);
901 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
903 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
904 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
905 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
907 EXPORT_SYMBOL(iwl_connection_init_rx_config);
909 void iwl_set_rate(struct iwl_priv *priv)
911 const struct ieee80211_supported_band *hw = NULL;
912 struct ieee80211_rate *rate;
913 struct iwl_rxon_context *ctx;
916 hw = iwl_get_hw_mode(priv, priv->band);
918 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
922 priv->active_rate = 0;
924 for (i = 0; i < hw->n_bitrates; i++) {
925 rate = &(hw->bitrates[i]);
926 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
927 priv->active_rate |= (1 << rate->hw_value);
930 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
932 for_each_context(priv, ctx) {
933 ctx->staging.cck_basic_rates =
934 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
936 ctx->staging.ofdm_basic_rates =
937 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
940 EXPORT_SYMBOL(iwl_set_rate);
942 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
946 * See iwl_mac_channel_switch.
948 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
950 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
953 if (priv->switch_rxon.switch_in_progress) {
954 ieee80211_chswitch_done(ctx->vif, is_success);
955 mutex_lock(&priv->mutex);
956 priv->switch_rxon.switch_in_progress = false;
957 mutex_unlock(&priv->mutex);
960 EXPORT_SYMBOL(iwl_chswitch_done);
962 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
964 struct iwl_rx_packet *pkt = rxb_addr(rxb);
965 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
968 * See iwl_mac_channel_switch.
970 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
971 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
973 if (priv->switch_rxon.switch_in_progress) {
974 if (!le32_to_cpu(csa->status) &&
975 (csa->channel == priv->switch_rxon.channel)) {
976 rxon->channel = csa->channel;
977 ctx->staging.channel = csa->channel;
978 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
979 le16_to_cpu(csa->channel));
980 iwl_chswitch_done(priv, true);
982 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
983 le16_to_cpu(csa->channel));
984 iwl_chswitch_done(priv, false);
988 EXPORT_SYMBOL(iwl_rx_csa);
990 #ifdef CONFIG_IWLWIFI_DEBUG
991 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
992 struct iwl_rxon_context *ctx)
994 struct iwl_rxon_cmd *rxon = &ctx->staging;
996 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
997 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
998 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
999 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1000 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1001 le32_to_cpu(rxon->filter_flags));
1002 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1003 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1004 rxon->ofdm_basic_rates);
1005 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1006 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1007 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1008 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1010 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1013 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1015 void iwl_irq_handle_error(struct iwl_priv *priv)
1017 /* Set the FW error flag -- cleared on iwl_down */
1018 set_bit(STATUS_FW_ERROR, &priv->status);
1020 /* Cancel currently queued command. */
1021 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1023 IWL_ERR(priv, "Loaded firmware version: %s\n",
1024 priv->hw->wiphy->fw_version);
1026 priv->cfg->ops->lib->dump_nic_error_log(priv);
1027 if (priv->cfg->ops->lib->dump_csr)
1028 priv->cfg->ops->lib->dump_csr(priv);
1029 if (priv->cfg->ops->lib->dump_fh)
1030 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1031 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1032 #ifdef CONFIG_IWLWIFI_DEBUG
1033 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1034 iwl_print_rx_config_cmd(priv,
1035 &priv->contexts[IWL_RXON_CTX_BSS]);
1038 wake_up_interruptible(&priv->wait_command_queue);
1040 /* Keep the restart process from trying to send host
1041 * commands by clearing the INIT status bit */
1042 clear_bit(STATUS_READY, &priv->status);
1044 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1045 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1046 "Restarting adapter due to uCode error.\n");
1048 if (priv->cfg->mod_params->restart_fw)
1049 queue_work(priv->workqueue, &priv->restart);
1052 EXPORT_SYMBOL(iwl_irq_handle_error);
1054 static int iwl_apm_stop_master(struct iwl_priv *priv)
1058 /* stop device's busmaster DMA activity */
1059 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1061 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1062 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1064 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1066 IWL_DEBUG_INFO(priv, "stop master\n");
1071 void iwl_apm_stop(struct iwl_priv *priv)
1073 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1075 /* Stop device's DMA activity */
1076 iwl_apm_stop_master(priv);
1078 /* Reset the entire device */
1079 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1084 * Clear "initialization complete" bit to move adapter from
1085 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1087 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1089 EXPORT_SYMBOL(iwl_apm_stop);
1093 * Start up NIC's basic functionality after it has been reset
1094 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1095 * NOTE: This does not load uCode nor start the embedded processor
1097 int iwl_apm_init(struct iwl_priv *priv)
1102 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1105 * Use "set_bit" below rather than "write", to preserve any hardware
1106 * bits already set by default after reset.
1109 /* Disable L0S exit timer (platform NMI Work/Around) */
1110 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1111 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1114 * Disable L0s without affecting L1;
1115 * don't wait for ICH L0s (ICH bug W/A)
1117 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1118 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1120 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1121 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1124 * Enable HAP INTA (interrupt from management bus) to
1125 * wake device's PCI Express link L1a -> L0s
1126 * NOTE: This is no-op for 3945 (non-existant bit)
1128 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1129 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1132 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1133 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1134 * If so (likely), disable L0S, so device moves directly L0->L1;
1135 * costs negligible amount of power savings.
1136 * If not (unlikely), enable L0S, so there is at least some
1137 * power savings, even without L1.
1139 if (priv->cfg->base_params->set_l0s) {
1140 lctl = iwl_pcie_link_ctl(priv);
1141 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1142 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1143 /* L1-ASPM enabled; disable(!) L0S */
1144 iwl_set_bit(priv, CSR_GIO_REG,
1145 CSR_GIO_REG_VAL_L0S_ENABLED);
1146 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1148 /* L1-ASPM disabled; enable(!) L0S */
1149 iwl_clear_bit(priv, CSR_GIO_REG,
1150 CSR_GIO_REG_VAL_L0S_ENABLED);
1151 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1155 /* Configure analog phase-lock-loop before activating to D0A */
1156 if (priv->cfg->base_params->pll_cfg_val)
1157 iwl_set_bit(priv, CSR_ANA_PLL_CFG,
1158 priv->cfg->base_params->pll_cfg_val);
1161 * Set "initialization complete" bit to move adapter from
1162 * D0U* --> D0A* (powered-up active) state.
1164 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1167 * Wait for clock stabilization; once stabilized, access to
1168 * device-internal resources is supported, e.g. iwl_write_prph()
1169 * and accesses to uCode SRAM.
1171 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1172 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1173 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1175 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1180 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1181 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1182 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1183 * and don't need BSM to restore data after power-saving sleep.
1185 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1186 * do not disable clocks. This preserves any hardware bits already
1187 * set by default in "CLK_CTRL_REG" after reset.
1189 if (priv->cfg->base_params->use_bsm)
1190 iwl_write_prph(priv, APMG_CLK_EN_REG,
1191 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1193 iwl_write_prph(priv, APMG_CLK_EN_REG,
1194 APMG_CLK_VAL_DMA_CLK_RQT);
1197 /* Disable L1-Active */
1198 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1199 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1204 EXPORT_SYMBOL(iwl_apm_init);
1207 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1210 s8 prev_tx_power = priv->tx_power_user_lmt;
1212 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1214 "Requested user TXPOWER %d below lower limit %d.\n",
1216 IWLAGN_TX_POWER_TARGET_POWER_MIN);
1220 if (tx_power > priv->tx_power_device_lmt) {
1222 "Requested user TXPOWER %d above upper limit %d.\n",
1223 tx_power, priv->tx_power_device_lmt);
1227 if (priv->tx_power_user_lmt != tx_power)
1230 /* if nic is not up don't send command */
1231 if (iwl_is_ready_rf(priv)) {
1232 priv->tx_power_user_lmt = tx_power;
1233 if (force && priv->cfg->ops->lib->send_tx_power)
1234 ret = priv->cfg->ops->lib->send_tx_power(priv);
1235 else if (!priv->cfg->ops->lib->send_tx_power)
1238 * if fail to set tx_power, restore the orig. tx power
1241 priv->tx_power_user_lmt = prev_tx_power;
1245 * Even this is an async host command, the command
1246 * will always report success from uCode
1247 * So once driver can placing the command into the queue
1248 * successfully, driver can use priv->tx_power_user_lmt
1249 * to reflect the current tx power
1253 EXPORT_SYMBOL(iwl_set_tx_power);
1255 irqreturn_t iwl_isr_legacy(int irq, void *data)
1257 struct iwl_priv *priv = data;
1258 u32 inta, inta_mask;
1260 unsigned long flags;
1264 spin_lock_irqsave(&priv->lock, flags);
1266 /* Disable (but don't clear!) interrupts here to avoid
1267 * back-to-back ISRs and sporadic interrupts from our NIC.
1268 * If we have something to service, the tasklet will re-enable ints.
1269 * If we *don't* have something, we'll re-enable before leaving here. */
1270 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1271 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1273 /* Discover which interrupts are active/pending */
1274 inta = iwl_read32(priv, CSR_INT);
1275 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1277 /* Ignore interrupt if there's nothing in NIC to service.
1278 * This may be due to IRQ shared with another device,
1279 * or due to sporadic interrupts thrown from our NIC. */
1280 if (!inta && !inta_fh) {
1281 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1285 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1286 /* Hardware disappeared. It might have already raised
1288 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1292 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1293 inta, inta_mask, inta_fh);
1295 inta &= ~CSR_INT_BIT_SCD;
1297 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1298 if (likely(inta || inta_fh))
1299 tasklet_schedule(&priv->irq_tasklet);
1302 spin_unlock_irqrestore(&priv->lock, flags);
1306 /* re-enable interrupts here since we don't have anything to service. */
1307 /* only Re-enable if diabled by irq */
1308 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1309 iwl_enable_interrupts(priv);
1310 spin_unlock_irqrestore(&priv->lock, flags);
1313 EXPORT_SYMBOL(iwl_isr_legacy);
1315 void iwl_send_bt_config(struct iwl_priv *priv)
1317 struct iwl_bt_cmd bt_cmd = {
1318 .lead_time = BT_LEAD_TIME_DEF,
1319 .max_kill = BT_MAX_KILL_DEF,
1324 if (!bt_coex_active)
1325 bt_cmd.flags = BT_COEX_DISABLE;
1327 bt_cmd.flags = BT_COEX_ENABLE;
1329 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1330 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1332 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1333 sizeof(struct iwl_bt_cmd), &bt_cmd))
1334 IWL_ERR(priv, "failed to send BT Coex Config\n");
1336 EXPORT_SYMBOL(iwl_send_bt_config);
1338 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1340 struct iwl_statistics_cmd statistics_cmd = {
1341 .configuration_flags =
1342 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1345 if (flags & CMD_ASYNC)
1346 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1347 sizeof(struct iwl_statistics_cmd),
1348 &statistics_cmd, NULL);
1350 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1351 sizeof(struct iwl_statistics_cmd),
1354 EXPORT_SYMBOL(iwl_send_statistics_request);
1356 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1357 struct iwl_rx_mem_buffer *rxb)
1359 #ifdef CONFIG_IWLWIFI_DEBUG
1360 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1361 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1362 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1363 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1366 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1368 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1369 struct iwl_rx_mem_buffer *rxb)
1371 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1372 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1373 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1374 "notification for %s:\n", len,
1375 get_cmd_string(pkt->hdr.cmd));
1376 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1378 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1380 void iwl_rx_reply_error(struct iwl_priv *priv,
1381 struct iwl_rx_mem_buffer *rxb)
1383 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1385 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1386 "seq 0x%04X ser 0x%08X\n",
1387 le32_to_cpu(pkt->u.err_resp.error_type),
1388 get_cmd_string(pkt->u.err_resp.cmd_id),
1389 pkt->u.err_resp.cmd_id,
1390 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1391 le32_to_cpu(pkt->u.err_resp.error_info));
1393 EXPORT_SYMBOL(iwl_rx_reply_error);
1395 void iwl_clear_isr_stats(struct iwl_priv *priv)
1397 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1400 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1401 const struct ieee80211_tx_queue_params *params)
1403 struct iwl_priv *priv = hw->priv;
1404 struct iwl_rxon_context *ctx;
1405 unsigned long flags;
1408 IWL_DEBUG_MAC80211(priv, "enter\n");
1410 if (!iwl_is_ready_rf(priv)) {
1411 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1415 if (queue >= AC_NUM) {
1416 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1420 q = AC_NUM - 1 - queue;
1422 spin_lock_irqsave(&priv->lock, flags);
1426 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1428 for_each_context(priv, ctx) {
1429 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1430 cpu_to_le16(params->cw_min);
1431 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1432 cpu_to_le16(params->cw_max);
1433 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1434 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1435 cpu_to_le16((params->txop * 32));
1437 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1440 spin_unlock_irqrestore(&priv->lock, flags);
1442 IWL_DEBUG_MAC80211(priv, "leave\n");
1445 EXPORT_SYMBOL(iwl_mac_conf_tx);
1447 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1449 struct iwl_priv *priv = hw->priv;
1451 return priv->ibss_manager == IWL_IBSS_MANAGER;
1453 EXPORT_SYMBOL_GPL(iwl_mac_tx_last_beacon);
1455 static void iwl_ht_conf(struct iwl_priv *priv,
1456 struct ieee80211_vif *vif)
1458 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1459 struct ieee80211_sta *sta;
1460 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1461 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1463 IWL_DEBUG_MAC80211(priv, "enter:\n");
1465 if (!ctx->ht.enabled)
1468 ctx->ht.protection =
1469 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1470 ctx->ht.non_gf_sta_present =
1471 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1473 ht_conf->single_chain_sufficient = false;
1475 switch (vif->type) {
1476 case NL80211_IFTYPE_STATION:
1478 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1480 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1483 maxstreams = (ht_cap->mcs.tx_params &
1484 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1485 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1488 if ((ht_cap->mcs.rx_mask[1] == 0) &&
1489 (ht_cap->mcs.rx_mask[2] == 0))
1490 ht_conf->single_chain_sufficient = true;
1491 if (maxstreams <= 1)
1492 ht_conf->single_chain_sufficient = true;
1495 * If at all, this can only happen through a race
1496 * when the AP disconnects us while we're still
1497 * setting up the connection, in that case mac80211
1498 * will soon tell us about that.
1500 ht_conf->single_chain_sufficient = true;
1504 case NL80211_IFTYPE_ADHOC:
1505 ht_conf->single_chain_sufficient = true;
1511 IWL_DEBUG_MAC80211(priv, "leave\n");
1514 static inline void iwl_set_no_assoc(struct iwl_priv *priv,
1515 struct ieee80211_vif *vif)
1517 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1519 iwl_led_disassociate(priv);
1521 * inform the ucode that there is no longer an
1522 * association and that no more packets should be
1525 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1526 ctx->staging.assoc_id = 0;
1527 iwlcore_commit_rxon(priv, ctx);
1530 static void iwlcore_beacon_update(struct ieee80211_hw *hw,
1531 struct ieee80211_vif *vif)
1533 struct iwl_priv *priv = hw->priv;
1534 unsigned long flags;
1536 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
1541 IWL_DEBUG_ASSOC(priv, "enter\n");
1543 lockdep_assert_held(&priv->mutex);
1545 if (!priv->beacon_ctx) {
1546 IWL_ERR(priv, "update beacon but no beacon context!\n");
1551 spin_lock_irqsave(&priv->lock, flags);
1553 if (priv->beacon_skb)
1554 dev_kfree_skb(priv->beacon_skb);
1556 priv->beacon_skb = skb;
1558 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1559 priv->timestamp = le64_to_cpu(timestamp);
1561 IWL_DEBUG_ASSOC(priv, "leave\n");
1563 spin_unlock_irqrestore(&priv->lock, flags);
1565 if (!iwl_is_ready_rf(priv)) {
1566 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1570 priv->cfg->ops->lib->post_associate(priv, priv->beacon_ctx->vif);
1573 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1574 struct ieee80211_vif *vif,
1575 struct ieee80211_bss_conf *bss_conf,
1578 struct iwl_priv *priv = hw->priv;
1579 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1582 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1584 if (!iwl_is_alive(priv))
1587 mutex_lock(&priv->mutex);
1589 if (changes & BSS_CHANGED_QOS) {
1590 unsigned long flags;
1592 spin_lock_irqsave(&priv->lock, flags);
1593 ctx->qos_data.qos_active = bss_conf->qos;
1594 iwl_update_qos(priv, ctx);
1595 spin_unlock_irqrestore(&priv->lock, flags);
1598 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1600 * the add_interface code must make sure we only ever
1601 * have a single interface that could be beaconing at
1604 if (vif->bss_conf.enable_beacon)
1605 priv->beacon_ctx = ctx;
1607 priv->beacon_ctx = NULL;
1610 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1611 dev_kfree_skb(priv->beacon_skb);
1612 priv->beacon_skb = ieee80211_beacon_get(hw, vif);
1615 if (changes & BSS_CHANGED_BEACON_INT && vif->type == NL80211_IFTYPE_AP)
1616 iwl_send_rxon_timing(priv, ctx);
1618 if (changes & BSS_CHANGED_BSSID) {
1619 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1622 * If there is currently a HW scan going on in the
1623 * background then we need to cancel it else the RXON
1624 * below/in post_associate will fail.
1626 if (iwl_scan_cancel_timeout(priv, 100)) {
1627 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1628 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1629 mutex_unlock(&priv->mutex);
1633 /* mac80211 only sets assoc when in STATION mode */
1634 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1635 memcpy(ctx->staging.bssid_addr,
1636 bss_conf->bssid, ETH_ALEN);
1638 /* currently needed in a few places */
1639 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1641 ctx->staging.filter_flags &=
1642 ~RXON_FILTER_ASSOC_MSK;
1648 * This needs to be after setting the BSSID in case
1649 * mac80211 decides to do both changes at once because
1650 * it will invoke post_associate.
1652 if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
1653 iwlcore_beacon_update(hw, vif);
1655 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1656 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1657 bss_conf->use_short_preamble);
1658 if (bss_conf->use_short_preamble)
1659 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1661 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1664 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1665 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1666 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1667 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1669 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1670 if (bss_conf->use_cts_prot)
1671 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1673 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1676 if (changes & BSS_CHANGED_BASIC_RATES) {
1677 /* XXX use this information
1679 * To do that, remove code from iwl_set_rate() and put something
1683 ctx->staging.ofdm_basic_rates =
1684 bss_conf->basic_rates;
1686 ctx->staging.ofdm_basic_rates =
1687 bss_conf->basic_rates >> 4;
1688 ctx->staging.cck_basic_rates =
1689 bss_conf->basic_rates & 0xF;
1693 if (changes & BSS_CHANGED_HT) {
1694 iwl_ht_conf(priv, vif);
1696 if (priv->cfg->ops->hcmd->set_rxon_chain)
1697 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1700 if (changes & BSS_CHANGED_ASSOC) {
1701 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1702 if (bss_conf->assoc) {
1703 priv->timestamp = bss_conf->timestamp;
1705 iwl_led_associate(priv);
1707 if (!iwl_is_rfkill(priv))
1708 priv->cfg->ops->lib->post_associate(priv, vif);
1710 iwl_set_no_assoc(priv, vif);
1713 if (changes && iwl_is_associated_ctx(ctx) && bss_conf->aid) {
1714 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1716 ret = iwl_send_rxon_assoc(priv, ctx);
1718 /* Sync active_rxon with latest change. */
1719 memcpy((void *)&ctx->active,
1721 sizeof(struct iwl_rxon_cmd));
1725 if (changes & BSS_CHANGED_BEACON_ENABLED) {
1726 if (vif->bss_conf.enable_beacon) {
1727 memcpy(ctx->staging.bssid_addr,
1728 bss_conf->bssid, ETH_ALEN);
1729 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1730 iwl_led_associate(priv);
1731 iwlcore_config_ap(priv, vif);
1733 iwl_set_no_assoc(priv, vif);
1736 if (changes & BSS_CHANGED_IBSS) {
1737 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1738 bss_conf->ibss_joined);
1740 IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1741 bss_conf->ibss_joined ? "add" : "remove",
1745 if (changes & BSS_CHANGED_IDLE &&
1746 priv->cfg->ops->hcmd->set_pan_params) {
1747 if (priv->cfg->ops->hcmd->set_pan_params(priv))
1748 IWL_ERR(priv, "failed to update PAN params\n");
1751 mutex_unlock(&priv->mutex);
1753 IWL_DEBUG_MAC80211(priv, "leave\n");
1755 EXPORT_SYMBOL(iwl_bss_info_changed);
1757 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
1759 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1761 iwl_connection_init_rx_config(priv, ctx);
1763 if (priv->cfg->ops->hcmd->set_rxon_chain)
1764 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1766 return iwlcore_commit_rxon(priv, ctx);
1769 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1771 struct iwl_priv *priv = hw->priv;
1772 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1773 struct iwl_rxon_context *tmp, *ctx = NULL;
1776 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1777 vif->type, vif->addr);
1779 mutex_lock(&priv->mutex);
1781 if (!iwl_is_ready_rf(priv)) {
1782 IWL_WARN(priv, "Try to add interface when device not ready\n");
1787 for_each_context(priv, tmp) {
1788 u32 possible_modes =
1789 tmp->interface_modes | tmp->exclusive_interface_modes;
1792 /* check if this busy context is exclusive */
1793 if (tmp->exclusive_interface_modes &
1794 BIT(tmp->vif->type)) {
1801 if (!(possible_modes & BIT(vif->type)))
1804 /* have maybe usable context w/o interface */
1814 vif_priv->ctx = ctx;
1817 * This variable will be correct only when there's just
1818 * a single context, but all code using it is for hardware
1819 * that supports only one context.
1821 priv->iw_mode = vif->type;
1823 ctx->is_active = true;
1825 err = iwl_set_mode(priv, vif);
1827 if (!ctx->always_active)
1828 ctx->is_active = false;
1832 if (priv->cfg->bt_params &&
1833 priv->cfg->bt_params->advanced_bt_coexist &&
1834 vif->type == NL80211_IFTYPE_ADHOC) {
1836 * pretend to have high BT traffic as long as we
1837 * are operating in IBSS mode, as this will cause
1838 * the rate scaling etc. to behave as intended.
1840 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1847 priv->iw_mode = NL80211_IFTYPE_STATION;
1849 mutex_unlock(&priv->mutex);
1851 IWL_DEBUG_MAC80211(priv, "leave\n");
1854 EXPORT_SYMBOL(iwl_mac_add_interface);
1856 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1857 struct ieee80211_vif *vif)
1859 struct iwl_priv *priv = hw->priv;
1860 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1862 IWL_DEBUG_MAC80211(priv, "enter\n");
1864 mutex_lock(&priv->mutex);
1866 WARN_ON(ctx->vif != vif);
1869 if (priv->scan_vif == vif) {
1870 iwl_scan_cancel_timeout(priv, 200);
1871 iwl_force_scan_end(priv);
1873 iwl_set_mode(priv, vif);
1875 if (!ctx->always_active)
1876 ctx->is_active = false;
1879 * When removing the IBSS interface, overwrite the
1880 * BT traffic load with the stored one from the last
1881 * notification, if any. If this is a device that
1882 * doesn't implement this, this has no effect since
1883 * both values are the same and zero.
1885 if (vif->type == NL80211_IFTYPE_ADHOC)
1886 priv->bt_traffic_load = priv->notif_bt_traffic_load;
1888 memset(priv->bssid, 0, ETH_ALEN);
1889 mutex_unlock(&priv->mutex);
1891 IWL_DEBUG_MAC80211(priv, "leave\n");
1894 EXPORT_SYMBOL(iwl_mac_remove_interface);
1897 * iwl_mac_config - mac80211 config callback
1899 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
1901 struct iwl_priv *priv = hw->priv;
1902 const struct iwl_channel_info *ch_info;
1903 struct ieee80211_conf *conf = &hw->conf;
1904 struct ieee80211_channel *channel = conf->channel;
1905 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1906 struct iwl_rxon_context *ctx;
1907 unsigned long flags = 0;
1910 int scan_active = 0;
1912 mutex_lock(&priv->mutex);
1914 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
1915 channel->hw_value, changed);
1917 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
1918 test_bit(STATUS_SCANNING, &priv->status))) {
1920 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1923 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1924 IEEE80211_CONF_CHANGE_CHANNEL)) {
1925 /* mac80211 uses static for non-HT which is what we want */
1926 priv->current_ht_config.smps = conf->smps_mode;
1929 * Recalculate chain counts.
1931 * If monitor mode is enabled then mac80211 will
1932 * set up the SM PS mode to OFF if an HT channel is
1935 if (priv->cfg->ops->hcmd->set_rxon_chain)
1936 for_each_context(priv, ctx)
1937 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1940 /* during scanning mac80211 will delay channel setting until
1941 * scan finish with changed = 0
1943 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1947 ch = channel->hw_value;
1948 ch_info = iwl_get_channel_info(priv, channel->band, ch);
1949 if (!is_channel_valid(ch_info)) {
1950 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
1955 spin_lock_irqsave(&priv->lock, flags);
1957 for_each_context(priv, ctx) {
1958 /* Configure HT40 channels */
1959 ctx->ht.enabled = conf_is_ht(conf);
1960 if (ctx->ht.enabled) {
1961 if (conf_is_ht40_minus(conf)) {
1962 ctx->ht.extension_chan_offset =
1963 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1964 ctx->ht.is_40mhz = true;
1965 } else if (conf_is_ht40_plus(conf)) {
1966 ctx->ht.extension_chan_offset =
1967 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1968 ctx->ht.is_40mhz = true;
1970 ctx->ht.extension_chan_offset =
1971 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1972 ctx->ht.is_40mhz = false;
1975 ctx->ht.is_40mhz = false;
1978 * Default to no protection. Protection mode will
1979 * later be set from BSS config in iwl_ht_conf
1981 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1983 /* if we are switching from ht to 2.4 clear flags
1984 * from any ht related info since 2.4 does not
1986 if ((le16_to_cpu(ctx->staging.channel) != ch))
1987 ctx->staging.flags = 0;
1989 iwl_set_rxon_channel(priv, channel, ctx);
1990 iwl_set_rxon_ht(priv, ht_conf);
1992 iwl_set_flags_for_band(priv, ctx, channel->band,
1996 spin_unlock_irqrestore(&priv->lock, flags);
1998 if (priv->cfg->ops->lib->update_bcast_stations)
1999 ret = priv->cfg->ops->lib->update_bcast_stations(priv);
2002 /* The list of supported rates and rate mask can be different
2003 * for each band; since the band may have changed, reset
2004 * the rate mask to what mac80211 lists */
2008 if (changed & (IEEE80211_CONF_CHANGE_PS |
2009 IEEE80211_CONF_CHANGE_IDLE)) {
2010 ret = iwl_power_update_mode(priv, false);
2012 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2015 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2016 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2017 priv->tx_power_user_lmt, conf->power_level);
2019 iwl_set_tx_power(priv, conf->power_level, false);
2022 if (!iwl_is_ready(priv)) {
2023 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2030 for_each_context(priv, ctx) {
2031 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2032 iwlcore_commit_rxon(priv, ctx);
2034 IWL_DEBUG_INFO(priv,
2035 "Not re-sending same RXON configuration.\n");
2039 IWL_DEBUG_MAC80211(priv, "leave\n");
2040 mutex_unlock(&priv->mutex);
2043 EXPORT_SYMBOL(iwl_mac_config);
2045 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2047 struct iwl_priv *priv = hw->priv;
2048 unsigned long flags;
2049 /* IBSS can only be the IWL_RXON_CTX_BSS context */
2050 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2052 mutex_lock(&priv->mutex);
2053 IWL_DEBUG_MAC80211(priv, "enter\n");
2055 spin_lock_irqsave(&priv->lock, flags);
2056 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2057 spin_unlock_irqrestore(&priv->lock, flags);
2059 spin_lock_irqsave(&priv->lock, flags);
2061 /* new association get rid of ibss beacon skb */
2062 if (priv->beacon_skb)
2063 dev_kfree_skb(priv->beacon_skb);
2065 priv->beacon_skb = NULL;
2067 priv->timestamp = 0;
2069 spin_unlock_irqrestore(&priv->lock, flags);
2071 iwl_scan_cancel_timeout(priv, 100);
2072 if (!iwl_is_ready_rf(priv)) {
2073 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2074 mutex_unlock(&priv->mutex);
2078 /* we are restarting association process
2079 * clear RXON_FILTER_ASSOC_MSK bit
2081 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2082 iwlcore_commit_rxon(priv, ctx);
2086 mutex_unlock(&priv->mutex);
2088 IWL_DEBUG_MAC80211(priv, "leave\n");
2090 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2092 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2095 priv->txq = kzalloc(
2096 sizeof(struct iwl_tx_queue) *
2097 priv->cfg->base_params->num_of_queues,
2100 IWL_ERR(priv, "Not enough memory for txq\n");
2105 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2107 void iwl_free_txq_mem(struct iwl_priv *priv)
2112 EXPORT_SYMBOL(iwl_free_txq_mem);
2114 #ifdef CONFIG_IWLWIFI_DEBUGFS
2116 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2118 void iwl_reset_traffic_log(struct iwl_priv *priv)
2120 priv->tx_traffic_idx = 0;
2121 priv->rx_traffic_idx = 0;
2122 if (priv->tx_traffic)
2123 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2124 if (priv->rx_traffic)
2125 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2128 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2130 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2132 if (iwl_debug_level & IWL_DL_TX) {
2133 if (!priv->tx_traffic) {
2135 kzalloc(traffic_size, GFP_KERNEL);
2136 if (!priv->tx_traffic)
2140 if (iwl_debug_level & IWL_DL_RX) {
2141 if (!priv->rx_traffic) {
2143 kzalloc(traffic_size, GFP_KERNEL);
2144 if (!priv->rx_traffic)
2148 iwl_reset_traffic_log(priv);
2151 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2153 void iwl_free_traffic_mem(struct iwl_priv *priv)
2155 kfree(priv->tx_traffic);
2156 priv->tx_traffic = NULL;
2158 kfree(priv->rx_traffic);
2159 priv->rx_traffic = NULL;
2161 EXPORT_SYMBOL(iwl_free_traffic_mem);
2163 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2164 u16 length, struct ieee80211_hdr *header)
2169 if (likely(!(iwl_debug_level & IWL_DL_TX)))
2172 if (!priv->tx_traffic)
2175 fc = header->frame_control;
2176 if (ieee80211_is_data(fc)) {
2177 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2178 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2179 memcpy((priv->tx_traffic +
2180 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2182 priv->tx_traffic_idx =
2183 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2186 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2188 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2189 u16 length, struct ieee80211_hdr *header)
2194 if (likely(!(iwl_debug_level & IWL_DL_RX)))
2197 if (!priv->rx_traffic)
2200 fc = header->frame_control;
2201 if (ieee80211_is_data(fc)) {
2202 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2203 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2204 memcpy((priv->rx_traffic +
2205 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2207 priv->rx_traffic_idx =
2208 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2211 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2213 const char *get_mgmt_string(int cmd)
2216 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2217 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2218 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2219 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2220 IWL_CMD(MANAGEMENT_PROBE_REQ);
2221 IWL_CMD(MANAGEMENT_PROBE_RESP);
2222 IWL_CMD(MANAGEMENT_BEACON);
2223 IWL_CMD(MANAGEMENT_ATIM);
2224 IWL_CMD(MANAGEMENT_DISASSOC);
2225 IWL_CMD(MANAGEMENT_AUTH);
2226 IWL_CMD(MANAGEMENT_DEAUTH);
2227 IWL_CMD(MANAGEMENT_ACTION);
2234 const char *get_ctrl_string(int cmd)
2237 IWL_CMD(CONTROL_BACK_REQ);
2238 IWL_CMD(CONTROL_BACK);
2239 IWL_CMD(CONTROL_PSPOLL);
2240 IWL_CMD(CONTROL_RTS);
2241 IWL_CMD(CONTROL_CTS);
2242 IWL_CMD(CONTROL_ACK);
2243 IWL_CMD(CONTROL_CFEND);
2244 IWL_CMD(CONTROL_CFENDACK);
2251 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2253 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2254 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2259 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2260 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2261 * Use debugFs to display the rx/rx_statistics
2262 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2263 * information will be recorded, but DATA pkt still will be recorded
2264 * for the reason of iwl_led.c need to control the led blinking based on
2265 * number of tx and rx data.
2268 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2270 struct traffic_stats *stats;
2273 stats = &priv->tx_stats;
2275 stats = &priv->rx_stats;
2277 if (ieee80211_is_mgmt(fc)) {
2278 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2279 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2280 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2282 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2283 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2285 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2286 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2288 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2289 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2291 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2292 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2294 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2295 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2297 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2298 stats->mgmt[MANAGEMENT_BEACON]++;
2300 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2301 stats->mgmt[MANAGEMENT_ATIM]++;
2303 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2304 stats->mgmt[MANAGEMENT_DISASSOC]++;
2306 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2307 stats->mgmt[MANAGEMENT_AUTH]++;
2309 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2310 stats->mgmt[MANAGEMENT_DEAUTH]++;
2312 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2313 stats->mgmt[MANAGEMENT_ACTION]++;
2316 } else if (ieee80211_is_ctl(fc)) {
2317 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2318 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2319 stats->ctrl[CONTROL_BACK_REQ]++;
2321 case cpu_to_le16(IEEE80211_STYPE_BACK):
2322 stats->ctrl[CONTROL_BACK]++;
2324 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2325 stats->ctrl[CONTROL_PSPOLL]++;
2327 case cpu_to_le16(IEEE80211_STYPE_RTS):
2328 stats->ctrl[CONTROL_RTS]++;
2330 case cpu_to_le16(IEEE80211_STYPE_CTS):
2331 stats->ctrl[CONTROL_CTS]++;
2333 case cpu_to_le16(IEEE80211_STYPE_ACK):
2334 stats->ctrl[CONTROL_ACK]++;
2336 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2337 stats->ctrl[CONTROL_CFEND]++;
2339 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2340 stats->ctrl[CONTROL_CFENDACK]++;
2346 stats->data_bytes += len;
2348 iwl_leds_background(priv);
2350 EXPORT_SYMBOL(iwl_update_stats);
2353 static void iwl_force_rf_reset(struct iwl_priv *priv)
2355 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2358 if (!iwl_is_any_associated(priv)) {
2359 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2363 * There is no easy and better way to force reset the radio,
2364 * the only known method is switching channel which will force to
2365 * reset and tune the radio.
2366 * Use internal short scan (single channel) operation to should
2367 * achieve this objective.
2368 * Driver should reset the radio when number of consecutive missed
2369 * beacon, or any other uCode error condition detected.
2371 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2372 iwl_internal_short_hw_scan(priv);
2376 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
2378 struct iwl_force_reset *force_reset;
2380 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2383 if (mode >= IWL_MAX_FORCE_RESET) {
2384 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2387 force_reset = &priv->force_reset[mode];
2388 force_reset->reset_request_count++;
2390 if (force_reset->last_force_reset_jiffies &&
2391 time_after(force_reset->last_force_reset_jiffies +
2392 force_reset->reset_duration, jiffies)) {
2393 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2394 force_reset->reset_reject_count++;
2398 force_reset->reset_success_count++;
2399 force_reset->last_force_reset_jiffies = jiffies;
2400 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2403 iwl_force_rf_reset(priv);
2407 * if the request is from external(ex: debugfs),
2408 * then always perform the request in regardless the module
2410 * if the request is from internal (uCode error or driver
2411 * detect failure), then fw_restart module parameter
2412 * need to be check before performing firmware reload
2414 if (!external && !priv->cfg->mod_params->restart_fw) {
2415 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
2416 "module parameter setting\n");
2419 IWL_ERR(priv, "On demand firmware reload\n");
2420 /* Set the FW error flag -- cleared on iwl_down */
2421 set_bit(STATUS_FW_ERROR, &priv->status);
2422 wake_up_interruptible(&priv->wait_command_queue);
2424 * Keep the restart process from trying to send host
2425 * commands by clearing the INIT status bit
2427 clear_bit(STATUS_READY, &priv->status);
2428 queue_work(priv->workqueue, &priv->restart);
2435 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2437 * During normal condition (no queue is stuck), the timer is continually set to
2438 * execute every monitor_recover_period milliseconds after the last timer
2439 * expired. When the queue read_ptr is at the same place, the timer is
2440 * shorten to 100mSecs. This is
2441 * 1) to reduce the chance that the read_ptr may wrap around (not stuck)
2442 * 2) to detect the stuck queues quicker before the station and AP can
2443 * disassociate each other.
2445 * This function monitors all the tx queues and recover from it if any
2446 * of the queues are stuck.
2447 * 1. It first check the cmd queue for stuck conditions. If it is stuck,
2448 * it will recover by resetting the firmware and return.
2449 * 2. Then, it checks for station association. If it associates it will check
2450 * other queues. If any queue is stuck, it will recover by resetting
2452 * Note: It the number of times the queue read_ptr to be at the same place to
2453 * be MAX_REPEAT+1 in order to consider to be stuck.
2456 * The maximum number of times the read pointer of the tx queue at the
2457 * same place without considering to be stuck.
2459 #define MAX_REPEAT (2)
2460 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2462 struct iwl_tx_queue *txq;
2463 struct iwl_queue *q;
2465 txq = &priv->txq[cnt];
2467 /* queue is empty, skip */
2468 if (q->read_ptr == q->write_ptr)
2471 if (q->read_ptr == q->last_read_ptr) {
2472 /* a queue has not been read from last time */
2473 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2475 "queue %d stuck %d time. Fw reload.\n",
2476 q->id, q->repeat_same_read_ptr);
2477 q->repeat_same_read_ptr = 0;
2478 iwl_force_reset(priv, IWL_FW_RESET, false);
2480 q->repeat_same_read_ptr++;
2481 IWL_DEBUG_RADIO(priv,
2482 "queue %d, not read %d time\n",
2484 q->repeat_same_read_ptr);
2485 mod_timer(&priv->monitor_recover,
2486 jiffies + msecs_to_jiffies(
2487 IWL_ONE_HUNDRED_MSECS));
2491 q->last_read_ptr = q->read_ptr;
2492 q->repeat_same_read_ptr = 0;
2497 void iwl_bg_monitor_recover(unsigned long data)
2499 struct iwl_priv *priv = (struct iwl_priv *)data;
2502 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2505 /* monitor and check for stuck cmd queue */
2506 if (iwl_check_stuck_queue(priv, priv->cmd_queue))
2509 /* monitor and check for other stuck queues */
2510 if (iwl_is_any_associated(priv)) {
2511 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2512 /* skip as we already checked the command queue */
2513 if (cnt == priv->cmd_queue)
2515 if (iwl_check_stuck_queue(priv, cnt))
2519 if (priv->cfg->base_params->monitor_recover_period) {
2521 * Reschedule the timer to occur in
2522 * priv->cfg->base_params->monitor_recover_period
2524 mod_timer(&priv->monitor_recover, jiffies + msecs_to_jiffies(
2525 priv->cfg->base_params->monitor_recover_period));
2528 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2532 * extended beacon time format
2533 * time in usec will be changed into a 32-bit value in extended:internal format
2534 * the extended part is the beacon counts
2535 * the internal part is the time in usec within one beacon interval
2537 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
2541 u32 interval = beacon_interval * TIME_UNIT;
2543 if (!interval || !usec)
2546 quot = (usec / interval) &
2547 (iwl_beacon_time_mask_high(priv,
2548 priv->hw_params.beacon_time_tsf_bits) >>
2549 priv->hw_params.beacon_time_tsf_bits);
2550 rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
2551 priv->hw_params.beacon_time_tsf_bits);
2553 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
2555 EXPORT_SYMBOL(iwl_usecs_to_beacons);
2557 /* base is usually what we get from ucode with each received frame,
2558 * the same as HW timer counter counting down
2560 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
2561 u32 addon, u32 beacon_interval)
2563 u32 base_low = base & iwl_beacon_time_mask_low(priv,
2564 priv->hw_params.beacon_time_tsf_bits);
2565 u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
2566 priv->hw_params.beacon_time_tsf_bits);
2567 u32 interval = beacon_interval * TIME_UNIT;
2568 u32 res = (base & iwl_beacon_time_mask_high(priv,
2569 priv->hw_params.beacon_time_tsf_bits)) +
2570 (addon & iwl_beacon_time_mask_high(priv,
2571 priv->hw_params.beacon_time_tsf_bits));
2573 if (base_low > addon_low)
2574 res += base_low - addon_low;
2575 else if (base_low < addon_low) {
2576 res += interval + base_low - addon_low;
2577 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2579 res += (1 << priv->hw_params.beacon_time_tsf_bits);
2581 return cpu_to_le32(res);
2583 EXPORT_SYMBOL(iwl_add_beacon_time);
2587 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2589 struct iwl_priv *priv = pci_get_drvdata(pdev);
2592 * This function is called when system goes into suspend state
2593 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2594 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2595 * it will not call apm_ops.stop() to stop the DMA operation.
2596 * Calling apm_ops.stop here to make sure we stop the DMA.
2600 pci_save_state(pdev);
2601 pci_disable_device(pdev);
2602 pci_set_power_state(pdev, PCI_D3hot);
2606 EXPORT_SYMBOL(iwl_pci_suspend);
2608 int iwl_pci_resume(struct pci_dev *pdev)
2610 struct iwl_priv *priv = pci_get_drvdata(pdev);
2612 bool hw_rfkill = false;
2615 * We disable the RETRY_TIMEOUT register (0x41) to keep
2616 * PCI Tx retries from interfering with C3 CPU state.
2618 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2620 pci_set_power_state(pdev, PCI_D0);
2621 ret = pci_enable_device(pdev);
2624 pci_restore_state(pdev);
2625 iwl_enable_interrupts(priv);
2627 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2628 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2632 set_bit(STATUS_RF_KILL_HW, &priv->status);
2634 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2636 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2640 EXPORT_SYMBOL(iwl_pci_resume);
2642 #endif /* CONFIG_PM */