1 /******************************************************************************
5 * Copyright(c) 2008 - 2011 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"
44 #include "iwl-helpers.h"
45 #include "iwl-shared.h"
47 #include "iwl-trans.h"
49 const u8 iwl_bcast_addr
[ETH_ALEN
] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
51 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
52 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
53 static void iwl_init_ht_hw_capab(const struct iwl_priv
*priv
,
54 struct ieee80211_sta_ht_cap
*ht_info
,
55 enum ieee80211_band band
)
58 u8 rx_chains_num
= hw_params(priv
).rx_chains_num
;
59 u8 tx_chains_num
= hw_params(priv
).tx_chains_num
;
62 memset(&ht_info
->mcs
, 0, sizeof(ht_info
->mcs
));
64 ht_info
->ht_supported
= true;
66 if (priv
->cfg
->ht_params
&&
67 priv
->cfg
->ht_params
->ht_greenfield_support
)
68 ht_info
->cap
|= IEEE80211_HT_CAP_GRN_FLD
;
69 ht_info
->cap
|= IEEE80211_HT_CAP_SGI_20
;
70 max_bit_rate
= MAX_BIT_RATE_20_MHZ
;
71 if (hw_params(priv
).ht40_channel
& BIT(band
)) {
72 ht_info
->cap
|= IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
73 ht_info
->cap
|= IEEE80211_HT_CAP_SGI_40
;
74 ht_info
->mcs
.rx_mask
[4] = 0x01;
75 max_bit_rate
= MAX_BIT_RATE_40_MHZ
;
78 if (iwlagn_mod_params
.amsdu_size_8K
)
79 ht_info
->cap
|= IEEE80211_HT_CAP_MAX_AMSDU
;
81 ht_info
->ampdu_factor
= CFG_HT_RX_AMPDU_FACTOR_DEF
;
82 if (priv
->cfg
->bt_params
&& priv
->cfg
->bt_params
->ampdu_factor
)
83 ht_info
->ampdu_factor
= priv
->cfg
->bt_params
->ampdu_factor
;
84 ht_info
->ampdu_density
= CFG_HT_MPDU_DENSITY_DEF
;
85 if (priv
->cfg
->bt_params
&& priv
->cfg
->bt_params
->ampdu_density
)
86 ht_info
->ampdu_density
= priv
->cfg
->bt_params
->ampdu_density
;
88 ht_info
->mcs
.rx_mask
[0] = 0xFF;
89 if (rx_chains_num
>= 2)
90 ht_info
->mcs
.rx_mask
[1] = 0xFF;
91 if (rx_chains_num
>= 3)
92 ht_info
->mcs
.rx_mask
[2] = 0xFF;
94 /* Highest supported Rx data rate */
95 max_bit_rate
*= rx_chains_num
;
96 WARN_ON(max_bit_rate
& ~IEEE80211_HT_MCS_RX_HIGHEST_MASK
);
97 ht_info
->mcs
.rx_highest
= cpu_to_le16(max_bit_rate
);
99 /* Tx MCS capabilities */
100 ht_info
->mcs
.tx_params
= IEEE80211_HT_MCS_TX_DEFINED
;
101 if (tx_chains_num
!= rx_chains_num
) {
102 ht_info
->mcs
.tx_params
|= IEEE80211_HT_MCS_TX_RX_DIFF
;
103 ht_info
->mcs
.tx_params
|= ((tx_chains_num
- 1) <<
104 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
);
109 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
111 int iwl_init_geos(struct iwl_priv
*priv
)
113 struct iwl_channel_info
*ch
;
114 struct ieee80211_supported_band
*sband
;
115 struct ieee80211_channel
*channels
;
116 struct ieee80211_channel
*geo_ch
;
117 struct ieee80211_rate
*rates
;
119 s8 max_tx_power
= IWLAGN_TX_POWER_TARGET_POWER_MIN
;
121 if (priv
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
||
122 priv
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
) {
123 IWL_DEBUG_INFO(priv
, "Geography modes already initialized.\n");
124 set_bit(STATUS_GEO_CONFIGURED
, &priv
->status
);
128 channels
= kzalloc(sizeof(struct ieee80211_channel
) *
129 priv
->channel_count
, GFP_KERNEL
);
133 rates
= kzalloc((sizeof(struct ieee80211_rate
) * IWL_RATE_COUNT_LEGACY
),
140 /* 5.2GHz channels start after the 2.4GHz channels */
141 sband
= &priv
->bands
[IEEE80211_BAND_5GHZ
];
142 sband
->channels
= &channels
[ARRAY_SIZE(iwl_eeprom_band_1
)];
144 sband
->bitrates
= &rates
[IWL_FIRST_OFDM_RATE
];
145 sband
->n_bitrates
= IWL_RATE_COUNT_LEGACY
- IWL_FIRST_OFDM_RATE
;
147 if (priv
->cfg
->sku
& EEPROM_SKU_CAP_11N_ENABLE
)
148 iwl_init_ht_hw_capab(priv
, &sband
->ht_cap
,
149 IEEE80211_BAND_5GHZ
);
151 sband
= &priv
->bands
[IEEE80211_BAND_2GHZ
];
152 sband
->channels
= channels
;
154 sband
->bitrates
= rates
;
155 sband
->n_bitrates
= IWL_RATE_COUNT_LEGACY
;
157 if (priv
->cfg
->sku
& EEPROM_SKU_CAP_11N_ENABLE
)
158 iwl_init_ht_hw_capab(priv
, &sband
->ht_cap
,
159 IEEE80211_BAND_2GHZ
);
161 priv
->ieee_channels
= channels
;
162 priv
->ieee_rates
= rates
;
164 for (i
= 0; i
< priv
->channel_count
; i
++) {
165 ch
= &priv
->channel_info
[i
];
167 /* FIXME: might be removed if scan is OK */
168 if (!is_channel_valid(ch
))
171 sband
= &priv
->bands
[ch
->band
];
173 geo_ch
= &sband
->channels
[sband
->n_channels
++];
175 geo_ch
->center_freq
=
176 ieee80211_channel_to_frequency(ch
->channel
, ch
->band
);
177 geo_ch
->max_power
= ch
->max_power_avg
;
178 geo_ch
->max_antenna_gain
= 0xff;
179 geo_ch
->hw_value
= ch
->channel
;
181 if (is_channel_valid(ch
)) {
182 if (!(ch
->flags
& EEPROM_CHANNEL_IBSS
))
183 geo_ch
->flags
|= IEEE80211_CHAN_NO_IBSS
;
185 if (!(ch
->flags
& EEPROM_CHANNEL_ACTIVE
))
186 geo_ch
->flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
188 if (ch
->flags
& EEPROM_CHANNEL_RADAR
)
189 geo_ch
->flags
|= IEEE80211_CHAN_RADAR
;
191 geo_ch
->flags
|= ch
->ht40_extension_channel
;
193 if (ch
->max_power_avg
> max_tx_power
)
194 max_tx_power
= ch
->max_power_avg
;
196 geo_ch
->flags
|= IEEE80211_CHAN_DISABLED
;
199 IWL_DEBUG_INFO(priv
, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
200 ch
->channel
, geo_ch
->center_freq
,
201 is_channel_a_band(ch
) ? "5.2" : "2.4",
202 geo_ch
->flags
& IEEE80211_CHAN_DISABLED
?
203 "restricted" : "valid",
207 priv
->tx_power_device_lmt
= max_tx_power
;
208 priv
->tx_power_user_lmt
= max_tx_power
;
209 priv
->tx_power_next
= max_tx_power
;
211 if ((priv
->bands
[IEEE80211_BAND_5GHZ
].n_channels
== 0) &&
212 priv
->cfg
->sku
& EEPROM_SKU_CAP_BAND_52GHZ
) {
214 bus_get_hw_id(priv
->bus
, buf
, sizeof(buf
));
215 IWL_INFO(priv
, "Incorrectly detected BG card as ABG. "
216 "Please send your %s to maintainer.\n", buf
);
217 priv
->cfg
->sku
&= ~EEPROM_SKU_CAP_BAND_52GHZ
;
220 IWL_INFO(priv
, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
221 priv
->bands
[IEEE80211_BAND_2GHZ
].n_channels
,
222 priv
->bands
[IEEE80211_BAND_5GHZ
].n_channels
);
224 set_bit(STATUS_GEO_CONFIGURED
, &priv
->status
);
230 * iwl_free_geos - undo allocations in iwl_init_geos
232 void iwl_free_geos(struct iwl_priv
*priv
)
234 kfree(priv
->ieee_channels
);
235 kfree(priv
->ieee_rates
);
236 clear_bit(STATUS_GEO_CONFIGURED
, &priv
->status
);
239 static bool iwl_is_channel_extension(struct iwl_priv
*priv
,
240 enum ieee80211_band band
,
241 u16 channel
, u8 extension_chan_offset
)
243 const struct iwl_channel_info
*ch_info
;
245 ch_info
= iwl_get_channel_info(priv
, band
, channel
);
246 if (!is_channel_valid(ch_info
))
249 if (extension_chan_offset
== IEEE80211_HT_PARAM_CHA_SEC_ABOVE
)
250 return !(ch_info
->ht40_extension_channel
&
251 IEEE80211_CHAN_NO_HT40PLUS
);
252 else if (extension_chan_offset
== IEEE80211_HT_PARAM_CHA_SEC_BELOW
)
253 return !(ch_info
->ht40_extension_channel
&
254 IEEE80211_CHAN_NO_HT40MINUS
);
259 bool iwl_is_ht40_tx_allowed(struct iwl_priv
*priv
,
260 struct iwl_rxon_context
*ctx
,
261 struct ieee80211_sta_ht_cap
*ht_cap
)
263 if (!ctx
->ht
.enabled
|| !ctx
->ht
.is_40mhz
)
267 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
268 * the bit will not set if it is pure 40MHz case
270 if (ht_cap
&& !ht_cap
->ht_supported
)
273 #ifdef CONFIG_IWLWIFI_DEBUGFS
274 if (priv
->disable_ht40
)
278 return iwl_is_channel_extension(priv
, priv
->band
,
279 le16_to_cpu(ctx
->staging
.channel
),
280 ctx
->ht
.extension_chan_offset
);
283 static u16
iwl_adjust_beacon_interval(u16 beacon_val
, u16 max_beacon_val
)
289 * If mac80211 hasn't given us a beacon interval, program
290 * the default into the device (not checking this here
291 * would cause the adjustment below to return the maximum
292 * value, which may break PAN.)
295 return DEFAULT_BEACON_INTERVAL
;
298 * If the beacon interval we obtained from the peer
299 * is too large, we'll have to wake up more often
300 * (and in IBSS case, we'll beacon too much)
302 * For example, if max_beacon_val is 4096, and the
303 * requested beacon interval is 7000, we'll have to
304 * use 3500 to be able to wake up on the beacons.
306 * This could badly influence beacon detection stats.
309 beacon_factor
= (beacon_val
+ max_beacon_val
) / max_beacon_val
;
310 new_val
= beacon_val
/ beacon_factor
;
313 new_val
= max_beacon_val
;
318 int iwl_send_rxon_timing(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
321 s32 interval_tm
, rem
;
322 struct ieee80211_conf
*conf
= NULL
;
324 struct ieee80211_vif
*vif
= ctx
->vif
;
326 conf
= ieee80211_get_hw_conf(priv
->hw
);
328 lockdep_assert_held(&priv
->mutex
);
330 memset(&ctx
->timing
, 0, sizeof(struct iwl_rxon_time_cmd
));
332 ctx
->timing
.timestamp
= cpu_to_le64(priv
->timestamp
);
333 ctx
->timing
.listen_interval
= cpu_to_le16(conf
->listen_interval
);
335 beacon_int
= vif
? vif
->bss_conf
.beacon_int
: 0;
338 * TODO: For IBSS we need to get atim_window from mac80211,
339 * for now just always use 0
341 ctx
->timing
.atim_window
= 0;
343 if (ctx
->ctxid
== IWL_RXON_CTX_PAN
&&
344 (!ctx
->vif
|| ctx
->vif
->type
!= NL80211_IFTYPE_STATION
) &&
345 iwl_is_associated(priv
, IWL_RXON_CTX_BSS
) &&
346 priv
->contexts
[IWL_RXON_CTX_BSS
].vif
&&
347 priv
->contexts
[IWL_RXON_CTX_BSS
].vif
->bss_conf
.beacon_int
) {
348 ctx
->timing
.beacon_interval
=
349 priv
->contexts
[IWL_RXON_CTX_BSS
].timing
.beacon_interval
;
350 beacon_int
= le16_to_cpu(ctx
->timing
.beacon_interval
);
351 } else if (ctx
->ctxid
== IWL_RXON_CTX_BSS
&&
352 iwl_is_associated(priv
, IWL_RXON_CTX_PAN
) &&
353 priv
->contexts
[IWL_RXON_CTX_PAN
].vif
&&
354 priv
->contexts
[IWL_RXON_CTX_PAN
].vif
->bss_conf
.beacon_int
&&
355 (!iwl_is_associated_ctx(ctx
) || !ctx
->vif
||
356 !ctx
->vif
->bss_conf
.beacon_int
)) {
357 ctx
->timing
.beacon_interval
=
358 priv
->contexts
[IWL_RXON_CTX_PAN
].timing
.beacon_interval
;
359 beacon_int
= le16_to_cpu(ctx
->timing
.beacon_interval
);
361 beacon_int
= iwl_adjust_beacon_interval(beacon_int
,
362 hw_params(priv
).max_beacon_itrvl
* TIME_UNIT
);
363 ctx
->timing
.beacon_interval
= cpu_to_le16(beacon_int
);
366 ctx
->beacon_int
= beacon_int
;
368 tsf
= priv
->timestamp
; /* tsf is modifed by do_div: copy it */
369 interval_tm
= beacon_int
* TIME_UNIT
;
370 rem
= do_div(tsf
, interval_tm
);
371 ctx
->timing
.beacon_init_val
= cpu_to_le32(interval_tm
- rem
);
373 ctx
->timing
.dtim_period
= vif
? (vif
->bss_conf
.dtim_period
?: 1) : 1;
375 IWL_DEBUG_ASSOC(priv
,
376 "beacon interval %d beacon timer %d beacon tim %d\n",
377 le16_to_cpu(ctx
->timing
.beacon_interval
),
378 le32_to_cpu(ctx
->timing
.beacon_init_val
),
379 le16_to_cpu(ctx
->timing
.atim_window
));
381 return trans_send_cmd_pdu(&priv
->trans
, ctx
->rxon_timing_cmd
,
382 CMD_SYNC
, sizeof(ctx
->timing
), &ctx
->timing
);
385 void iwl_set_rxon_hwcrypto(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
,
388 struct iwl_rxon_cmd
*rxon
= &ctx
->staging
;
391 rxon
->filter_flags
&= ~RXON_FILTER_DIS_DECRYPT_MSK
;
393 rxon
->filter_flags
|= RXON_FILTER_DIS_DECRYPT_MSK
;
397 /* validate RXON structure is valid */
398 int iwl_check_rxon_cmd(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
400 struct iwl_rxon_cmd
*rxon
= &ctx
->staging
;
403 if (rxon
->flags
& RXON_FLG_BAND_24G_MSK
) {
404 if (rxon
->flags
& RXON_FLG_TGJ_NARROW_BAND_MSK
) {
405 IWL_WARN(priv
, "check 2.4G: wrong narrow\n");
408 if (rxon
->flags
& RXON_FLG_RADAR_DETECT_MSK
) {
409 IWL_WARN(priv
, "check 2.4G: wrong radar\n");
413 if (!(rxon
->flags
& RXON_FLG_SHORT_SLOT_MSK
)) {
414 IWL_WARN(priv
, "check 5.2G: not short slot!\n");
417 if (rxon
->flags
& RXON_FLG_CCK_MSK
) {
418 IWL_WARN(priv
, "check 5.2G: CCK!\n");
422 if ((rxon
->node_addr
[0] | rxon
->bssid_addr
[0]) & 0x1) {
423 IWL_WARN(priv
, "mac/bssid mcast!\n");
427 /* make sure basic rates 6Mbps and 1Mbps are supported */
428 if ((rxon
->ofdm_basic_rates
& IWL_RATE_6M_MASK
) == 0 &&
429 (rxon
->cck_basic_rates
& IWL_RATE_1M_MASK
) == 0) {
430 IWL_WARN(priv
, "neither 1 nor 6 are basic\n");
434 if (le16_to_cpu(rxon
->assoc_id
) > 2007) {
435 IWL_WARN(priv
, "aid > 2007\n");
439 if ((rxon
->flags
& (RXON_FLG_CCK_MSK
| RXON_FLG_SHORT_SLOT_MSK
))
440 == (RXON_FLG_CCK_MSK
| RXON_FLG_SHORT_SLOT_MSK
)) {
441 IWL_WARN(priv
, "CCK and short slot\n");
445 if ((rxon
->flags
& (RXON_FLG_CCK_MSK
| RXON_FLG_AUTO_DETECT_MSK
))
446 == (RXON_FLG_CCK_MSK
| RXON_FLG_AUTO_DETECT_MSK
)) {
447 IWL_WARN(priv
, "CCK and auto detect");
451 if ((rxon
->flags
& (RXON_FLG_AUTO_DETECT_MSK
|
452 RXON_FLG_TGG_PROTECT_MSK
)) ==
453 RXON_FLG_TGG_PROTECT_MSK
) {
454 IWL_WARN(priv
, "TGg but no auto-detect\n");
458 if (rxon
->channel
== 0) {
459 IWL_WARN(priv
, "zero channel is invalid\n");
463 WARN(errors
, "Invalid RXON (%#x), channel %d",
464 errors
, le16_to_cpu(rxon
->channel
));
466 return errors
? -EINVAL
: 0;
470 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
471 * @priv: staging_rxon is compared to active_rxon
473 * If the RXON structure is changing enough to require a new tune,
474 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
475 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
477 int iwl_full_rxon_required(struct iwl_priv
*priv
,
478 struct iwl_rxon_context
*ctx
)
480 const struct iwl_rxon_cmd
*staging
= &ctx
->staging
;
481 const struct iwl_rxon_cmd
*active
= &ctx
->active
;
485 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \
489 #define CHK_NEQ(c1, c2) \
490 if ((c1) != (c2)) { \
491 IWL_DEBUG_INFO(priv, "need full RXON - " \
492 #c1 " != " #c2 " - %d != %d\n", \
497 /* These items are only settable from the full RXON command */
498 CHK(!iwl_is_associated_ctx(ctx
));
499 CHK(compare_ether_addr(staging
->bssid_addr
, active
->bssid_addr
));
500 CHK(compare_ether_addr(staging
->node_addr
, active
->node_addr
));
501 CHK(compare_ether_addr(staging
->wlap_bssid_addr
,
502 active
->wlap_bssid_addr
));
503 CHK_NEQ(staging
->dev_type
, active
->dev_type
);
504 CHK_NEQ(staging
->channel
, active
->channel
);
505 CHK_NEQ(staging
->air_propagation
, active
->air_propagation
);
506 CHK_NEQ(staging
->ofdm_ht_single_stream_basic_rates
,
507 active
->ofdm_ht_single_stream_basic_rates
);
508 CHK_NEQ(staging
->ofdm_ht_dual_stream_basic_rates
,
509 active
->ofdm_ht_dual_stream_basic_rates
);
510 CHK_NEQ(staging
->ofdm_ht_triple_stream_basic_rates
,
511 active
->ofdm_ht_triple_stream_basic_rates
);
512 CHK_NEQ(staging
->assoc_id
, active
->assoc_id
);
514 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
515 * be updated with the RXON_ASSOC command -- however only some
516 * flag transitions are allowed using RXON_ASSOC */
518 /* Check if we are not switching bands */
519 CHK_NEQ(staging
->flags
& RXON_FLG_BAND_24G_MSK
,
520 active
->flags
& RXON_FLG_BAND_24G_MSK
);
522 /* Check if we are switching association toggle */
523 CHK_NEQ(staging
->filter_flags
& RXON_FILTER_ASSOC_MSK
,
524 active
->filter_flags
& RXON_FILTER_ASSOC_MSK
);
532 static void _iwl_set_rxon_ht(struct iwl_priv
*priv
,
533 struct iwl_ht_config
*ht_conf
,
534 struct iwl_rxon_context
*ctx
)
536 struct iwl_rxon_cmd
*rxon
= &ctx
->staging
;
538 if (!ctx
->ht
.enabled
) {
539 rxon
->flags
&= ~(RXON_FLG_CHANNEL_MODE_MSK
|
540 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
|
541 RXON_FLG_HT40_PROT_MSK
|
542 RXON_FLG_HT_PROT_MSK
);
546 /* FIXME: if the definition of ht.protection changed, the "translation"
547 * will be needed for rxon->flags
549 rxon
->flags
|= cpu_to_le32(ctx
->ht
.protection
<< RXON_FLG_HT_OPERATING_MODE_POS
);
551 /* Set up channel bandwidth:
552 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
553 /* clear the HT channel mode before set the mode */
554 rxon
->flags
&= ~(RXON_FLG_CHANNEL_MODE_MSK
|
555 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
);
556 if (iwl_is_ht40_tx_allowed(priv
, ctx
, NULL
)) {
558 if (ctx
->ht
.protection
== IEEE80211_HT_OP_MODE_PROTECTION_20MHZ
) {
559 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_PURE_40
;
560 /* Note: control channel is opposite of extension channel */
561 switch (ctx
->ht
.extension_chan_offset
) {
562 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
563 rxon
->flags
&= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
;
565 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
566 rxon
->flags
|= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
;
570 /* Note: control channel is opposite of extension channel */
571 switch (ctx
->ht
.extension_chan_offset
) {
572 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
573 rxon
->flags
&= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
);
574 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_MIXED
;
576 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
577 rxon
->flags
|= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
;
578 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_MIXED
;
580 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
582 /* channel location only valid if in Mixed mode */
583 IWL_ERR(priv
, "invalid extension channel offset\n");
588 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_LEGACY
;
591 iwlagn_set_rxon_chain(priv
, ctx
);
593 IWL_DEBUG_ASSOC(priv
, "rxon flags 0x%X operation mode :0x%X "
594 "extension channel offset 0x%x\n",
595 le32_to_cpu(rxon
->flags
), ctx
->ht
.protection
,
596 ctx
->ht
.extension_chan_offset
);
599 void iwl_set_rxon_ht(struct iwl_priv
*priv
, struct iwl_ht_config
*ht_conf
)
601 struct iwl_rxon_context
*ctx
;
603 for_each_context(priv
, ctx
)
604 _iwl_set_rxon_ht(priv
, ht_conf
, ctx
);
607 /* Return valid, unused, channel for a passive scan to reset the RF */
608 u8
iwl_get_single_channel_number(struct iwl_priv
*priv
,
609 enum ieee80211_band band
)
611 const struct iwl_channel_info
*ch_info
;
615 struct iwl_rxon_context
*ctx
;
617 if (band
== IEEE80211_BAND_5GHZ
) {
619 max
= priv
->channel_count
;
625 for (i
= min
; i
< max
; i
++) {
628 for_each_context(priv
, ctx
) {
629 busy
= priv
->channel_info
[i
].channel
==
630 le16_to_cpu(ctx
->staging
.channel
);
638 channel
= priv
->channel_info
[i
].channel
;
639 ch_info
= iwl_get_channel_info(priv
, band
, channel
);
640 if (is_channel_valid(ch_info
))
648 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
649 * @ch: requested channel as a pointer to struct ieee80211_channel
651 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
652 * in the staging RXON flag structure based on the ch->band
654 int iwl_set_rxon_channel(struct iwl_priv
*priv
, struct ieee80211_channel
*ch
,
655 struct iwl_rxon_context
*ctx
)
657 enum ieee80211_band band
= ch
->band
;
658 u16 channel
= ch
->hw_value
;
660 if ((le16_to_cpu(ctx
->staging
.channel
) == channel
) &&
661 (priv
->band
== band
))
664 ctx
->staging
.channel
= cpu_to_le16(channel
);
665 if (band
== IEEE80211_BAND_5GHZ
)
666 ctx
->staging
.flags
&= ~RXON_FLG_BAND_24G_MSK
;
668 ctx
->staging
.flags
|= RXON_FLG_BAND_24G_MSK
;
672 IWL_DEBUG_INFO(priv
, "Staging channel set to %d [%d]\n", channel
, band
);
677 void iwl_set_flags_for_band(struct iwl_priv
*priv
,
678 struct iwl_rxon_context
*ctx
,
679 enum ieee80211_band band
,
680 struct ieee80211_vif
*vif
)
682 if (band
== IEEE80211_BAND_5GHZ
) {
683 ctx
->staging
.flags
&=
684 ~(RXON_FLG_BAND_24G_MSK
| RXON_FLG_AUTO_DETECT_MSK
686 ctx
->staging
.flags
|= RXON_FLG_SHORT_SLOT_MSK
;
688 /* Copied from iwl_post_associate() */
689 if (vif
&& vif
->bss_conf
.use_short_slot
)
690 ctx
->staging
.flags
|= RXON_FLG_SHORT_SLOT_MSK
;
692 ctx
->staging
.flags
&= ~RXON_FLG_SHORT_SLOT_MSK
;
694 ctx
->staging
.flags
|= RXON_FLG_BAND_24G_MSK
;
695 ctx
->staging
.flags
|= RXON_FLG_AUTO_DETECT_MSK
;
696 ctx
->staging
.flags
&= ~RXON_FLG_CCK_MSK
;
701 * initialize rxon structure with default values from eeprom
703 void iwl_connection_init_rx_config(struct iwl_priv
*priv
,
704 struct iwl_rxon_context
*ctx
)
706 const struct iwl_channel_info
*ch_info
;
708 memset(&ctx
->staging
, 0, sizeof(ctx
->staging
));
711 ctx
->staging
.dev_type
= ctx
->unused_devtype
;
712 } else switch (ctx
->vif
->type
) {
713 case NL80211_IFTYPE_AP
:
714 ctx
->staging
.dev_type
= ctx
->ap_devtype
;
717 case NL80211_IFTYPE_STATION
:
718 ctx
->staging
.dev_type
= ctx
->station_devtype
;
719 ctx
->staging
.filter_flags
= RXON_FILTER_ACCEPT_GRP_MSK
;
722 case NL80211_IFTYPE_ADHOC
:
723 ctx
->staging
.dev_type
= ctx
->ibss_devtype
;
724 ctx
->staging
.flags
= RXON_FLG_SHORT_PREAMBLE_MSK
;
725 ctx
->staging
.filter_flags
= RXON_FILTER_BCON_AWARE_MSK
|
726 RXON_FILTER_ACCEPT_GRP_MSK
;
730 IWL_ERR(priv
, "Unsupported interface type %d\n",
736 /* TODO: Figure out when short_preamble would be set and cache from
738 if (!hw_to_local(priv
->hw
)->short_preamble
)
739 ctx
->staging
.flags
&= ~RXON_FLG_SHORT_PREAMBLE_MSK
;
741 ctx
->staging
.flags
|= RXON_FLG_SHORT_PREAMBLE_MSK
;
744 ch_info
= iwl_get_channel_info(priv
, priv
->band
,
745 le16_to_cpu(ctx
->active
.channel
));
748 ch_info
= &priv
->channel_info
[0];
750 ctx
->staging
.channel
= cpu_to_le16(ch_info
->channel
);
751 priv
->band
= ch_info
->band
;
753 iwl_set_flags_for_band(priv
, ctx
, priv
->band
, ctx
->vif
);
755 ctx
->staging
.ofdm_basic_rates
=
756 (IWL_OFDM_RATES_MASK
>> IWL_FIRST_OFDM_RATE
) & 0xFF;
757 ctx
->staging
.cck_basic_rates
=
758 (IWL_CCK_RATES_MASK
>> IWL_FIRST_CCK_RATE
) & 0xF;
760 /* clear both MIX and PURE40 mode flag */
761 ctx
->staging
.flags
&= ~(RXON_FLG_CHANNEL_MODE_MIXED
|
762 RXON_FLG_CHANNEL_MODE_PURE_40
);
764 memcpy(ctx
->staging
.node_addr
, ctx
->vif
->addr
, ETH_ALEN
);
766 ctx
->staging
.ofdm_ht_single_stream_basic_rates
= 0xff;
767 ctx
->staging
.ofdm_ht_dual_stream_basic_rates
= 0xff;
768 ctx
->staging
.ofdm_ht_triple_stream_basic_rates
= 0xff;
771 void iwl_set_rate(struct iwl_priv
*priv
)
773 const struct ieee80211_supported_band
*hw
= NULL
;
774 struct ieee80211_rate
*rate
;
775 struct iwl_rxon_context
*ctx
;
778 hw
= iwl_get_hw_mode(priv
, priv
->band
);
780 IWL_ERR(priv
, "Failed to set rate: unable to get hw mode\n");
784 priv
->active_rate
= 0;
786 for (i
= 0; i
< hw
->n_bitrates
; i
++) {
787 rate
= &(hw
->bitrates
[i
]);
788 if (rate
->hw_value
< IWL_RATE_COUNT_LEGACY
)
789 priv
->active_rate
|= (1 << rate
->hw_value
);
792 IWL_DEBUG_RATE(priv
, "Set active_rate = %0x\n", priv
->active_rate
);
794 for_each_context(priv
, ctx
) {
795 ctx
->staging
.cck_basic_rates
=
796 (IWL_CCK_BASIC_RATES_MASK
>> IWL_FIRST_CCK_RATE
) & 0xF;
798 ctx
->staging
.ofdm_basic_rates
=
799 (IWL_OFDM_BASIC_RATES_MASK
>> IWL_FIRST_OFDM_RATE
) & 0xFF;
803 void iwl_chswitch_done(struct iwl_priv
*priv
, bool is_success
)
807 * See iwl_mac_channel_switch.
809 struct iwl_rxon_context
*ctx
= &priv
->contexts
[IWL_RXON_CTX_BSS
];
811 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
814 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING
, &priv
->status
))
815 ieee80211_chswitch_done(ctx
->vif
, is_success
);
818 #ifdef CONFIG_IWLWIFI_DEBUG
819 void iwl_print_rx_config_cmd(struct iwl_priv
*priv
,
820 struct iwl_rxon_context
*ctx
)
822 struct iwl_rxon_cmd
*rxon
= &ctx
->staging
;
824 IWL_DEBUG_RADIO(priv
, "RX CONFIG:\n");
825 iwl_print_hex_dump(priv
, IWL_DL_RADIO
, (u8
*) rxon
, sizeof(*rxon
));
826 IWL_DEBUG_RADIO(priv
, "u16 channel: 0x%x\n", le16_to_cpu(rxon
->channel
));
827 IWL_DEBUG_RADIO(priv
, "u32 flags: 0x%08X\n", le32_to_cpu(rxon
->flags
));
828 IWL_DEBUG_RADIO(priv
, "u32 filter_flags: 0x%08x\n",
829 le32_to_cpu(rxon
->filter_flags
));
830 IWL_DEBUG_RADIO(priv
, "u8 dev_type: 0x%x\n", rxon
->dev_type
);
831 IWL_DEBUG_RADIO(priv
, "u8 ofdm_basic_rates: 0x%02x\n",
832 rxon
->ofdm_basic_rates
);
833 IWL_DEBUG_RADIO(priv
, "u8 cck_basic_rates: 0x%02x\n", rxon
->cck_basic_rates
);
834 IWL_DEBUG_RADIO(priv
, "u8[6] node_addr: %pM\n", rxon
->node_addr
);
835 IWL_DEBUG_RADIO(priv
, "u8[6] bssid_addr: %pM\n", rxon
->bssid_addr
);
836 IWL_DEBUG_RADIO(priv
, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon
->assoc_id
));
840 static void iwlagn_abort_notification_waits(struct iwl_priv
*priv
)
843 struct iwl_notification_wait
*wait_entry
;
845 spin_lock_irqsave(&priv
->notif_wait_lock
, flags
);
846 list_for_each_entry(wait_entry
, &priv
->notif_waits
, list
)
847 wait_entry
->aborted
= true;
848 spin_unlock_irqrestore(&priv
->notif_wait_lock
, flags
);
850 wake_up_all(&priv
->notif_waitq
);
853 void iwlagn_fw_error(struct iwl_priv
*priv
, bool ondemand
)
855 unsigned int reload_msec
;
856 unsigned long reload_jiffies
;
858 /* Set the FW error flag -- cleared on iwl_down */
859 set_bit(STATUS_FW_ERROR
, &priv
->status
);
861 /* Cancel currently queued command. */
862 clear_bit(STATUS_HCMD_ACTIVE
, &priv
->status
);
864 iwlagn_abort_notification_waits(priv
);
866 /* Keep the restart process from trying to send host
867 * commands by clearing the ready bit */
868 clear_bit(STATUS_READY
, &priv
->status
);
870 wake_up_interruptible(&priv
->wait_command_queue
);
874 * If firmware keep reloading, then it indicate something
875 * serious wrong and firmware having problem to recover
876 * from it. Instead of keep trying which will fill the syslog
877 * and hang the system, let's just stop it
879 reload_jiffies
= jiffies
;
880 reload_msec
= jiffies_to_msecs((long) reload_jiffies
-
881 (long) priv
->reload_jiffies
);
882 priv
->reload_jiffies
= reload_jiffies
;
883 if (reload_msec
<= IWL_MIN_RELOAD_DURATION
) {
884 priv
->reload_count
++;
885 if (priv
->reload_count
>= IWL_MAX_CONTINUE_RELOAD_CNT
) {
886 IWL_ERR(priv
, "BUG_ON, Stop restarting\n");
890 priv
->reload_count
= 0;
893 if (!test_bit(STATUS_EXIT_PENDING
, &priv
->status
)) {
894 if (iwlagn_mod_params
.restart_fw
) {
895 IWL_DEBUG(priv
, IWL_DL_FW_ERRORS
,
896 "Restarting adapter due to uCode error.\n");
897 queue_work(priv
->shrd
->workqueue
, &priv
->restart
);
899 IWL_DEBUG(priv
, IWL_DL_FW_ERRORS
,
900 "Detected FW error, but not restarting\n");
905 * iwl_irq_handle_error - called for HW or SW error interrupt from card
907 void iwl_irq_handle_error(struct iwl_priv
*priv
)
909 /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
910 if (priv
->cfg
->internal_wimax_coex
&&
911 (!(iwl_read_prph(priv
, APMG_CLK_CTRL_REG
) &
912 APMS_CLK_VAL_MRB_FUNC_MODE
) ||
913 (iwl_read_prph(priv
, APMG_PS_CTRL_REG
) &
914 APMG_PS_CTRL_VAL_RESET_REQ
))) {
916 * Keep the restart process from trying to send host
917 * commands by clearing the ready bit.
919 clear_bit(STATUS_READY
, &priv
->status
);
920 clear_bit(STATUS_HCMD_ACTIVE
, &priv
->status
);
921 wake_up_interruptible(&priv
->wait_command_queue
);
922 IWL_ERR(priv
, "RF is used by WiMAX\n");
926 IWL_ERR(priv
, "Loaded firmware version: %s\n",
927 priv
->hw
->wiphy
->fw_version
);
929 iwl_dump_nic_error_log(priv
);
931 iwl_dump_fh(priv
, NULL
, false);
932 iwl_dump_nic_event_log(priv
, false, NULL
, false);
933 #ifdef CONFIG_IWLWIFI_DEBUG
934 if (iwl_get_debug_level(priv
->shrd
) & IWL_DL_FW_ERRORS
)
935 iwl_print_rx_config_cmd(priv
,
936 &priv
->contexts
[IWL_RXON_CTX_BSS
]);
939 iwlagn_fw_error(priv
, false);
942 static int iwl_apm_stop_master(struct iwl_priv
*priv
)
946 /* stop device's busmaster DMA activity */
947 iwl_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_STOP_MASTER
);
949 ret
= iwl_poll_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_MASTER_DISABLED
,
950 CSR_RESET_REG_FLAG_MASTER_DISABLED
, 100);
952 IWL_WARN(priv
, "Master Disable Timed Out, 100 usec\n");
954 IWL_DEBUG_INFO(priv
, "stop master\n");
959 void iwl_apm_stop(struct iwl_priv
*priv
)
961 IWL_DEBUG_INFO(priv
, "Stop card, put in low power state\n");
963 clear_bit(STATUS_DEVICE_ENABLED
, &priv
->status
);
965 /* Stop device's DMA activity */
966 iwl_apm_stop_master(priv
);
968 /* Reset the entire device */
969 iwl_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_SW_RESET
);
974 * Clear "initialization complete" bit to move adapter from
975 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
977 iwl_clear_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
982 * Start up NIC's basic functionality after it has been reset
983 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
984 * NOTE: This does not load uCode nor start the embedded processor
986 int iwl_apm_init(struct iwl_priv
*priv
)
989 IWL_DEBUG_INFO(priv
, "Init card's basic functions\n");
992 * Use "set_bit" below rather than "write", to preserve any hardware
993 * bits already set by default after reset.
996 /* Disable L0S exit timer (platform NMI Work/Around) */
997 iwl_set_bit(priv
, CSR_GIO_CHICKEN_BITS
,
998 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER
);
1001 * Disable L0s without affecting L1;
1002 * don't wait for ICH L0s (ICH bug W/A)
1004 iwl_set_bit(priv
, CSR_GIO_CHICKEN_BITS
,
1005 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX
);
1007 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1008 iwl_set_bit(priv
, CSR_DBG_HPET_MEM_REG
, CSR_DBG_HPET_MEM_REG_VAL
);
1011 * Enable HAP INTA (interrupt from management bus) to
1012 * wake device's PCI Express link L1a -> L0s
1014 iwl_set_bit(priv
, CSR_HW_IF_CONFIG_REG
,
1015 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A
);
1017 bus_apm_config(priv
->bus
);
1019 /* Configure analog phase-lock-loop before activating to D0A */
1020 if (priv
->cfg
->base_params
->pll_cfg_val
)
1021 iwl_set_bit(priv
, CSR_ANA_PLL_CFG
,
1022 priv
->cfg
->base_params
->pll_cfg_val
);
1025 * Set "initialization complete" bit to move adapter from
1026 * D0U* --> D0A* (powered-up active) state.
1028 iwl_set_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
1031 * Wait for clock stabilization; once stabilized, access to
1032 * device-internal resources is supported, e.g. iwl_write_prph()
1033 * and accesses to uCode SRAM.
1035 ret
= iwl_poll_bit(priv
, CSR_GP_CNTRL
,
1036 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
,
1037 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
, 25000);
1039 IWL_DEBUG_INFO(priv
, "Failed to init the card\n");
1044 * Enable DMA clock and wait for it to stabilize.
1046 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1047 * do not disable clocks. This preserves any hardware bits already
1048 * set by default in "CLK_CTRL_REG" after reset.
1050 iwl_write_prph(priv
, APMG_CLK_EN_REG
, APMG_CLK_VAL_DMA_CLK_RQT
);
1053 /* Disable L1-Active */
1054 iwl_set_bits_prph(priv
, APMG_PCIDEV_STT_REG
,
1055 APMG_PCIDEV_STT_VAL_L1_ACT_DIS
);
1057 set_bit(STATUS_DEVICE_ENABLED
, &priv
->status
);
1064 int iwl_set_tx_power(struct iwl_priv
*priv
, s8 tx_power
, bool force
)
1069 struct iwl_rxon_context
*ctx
= &priv
->contexts
[IWL_RXON_CTX_BSS
];
1071 lockdep_assert_held(&priv
->mutex
);
1073 if (priv
->tx_power_user_lmt
== tx_power
&& !force
)
1076 if (tx_power
< IWLAGN_TX_POWER_TARGET_POWER_MIN
) {
1078 "Requested user TXPOWER %d below lower limit %d.\n",
1080 IWLAGN_TX_POWER_TARGET_POWER_MIN
);
1084 if (tx_power
> priv
->tx_power_device_lmt
) {
1086 "Requested user TXPOWER %d above upper limit %d.\n",
1087 tx_power
, priv
->tx_power_device_lmt
);
1091 if (!iwl_is_ready_rf(priv
))
1094 /* scan complete and commit_rxon use tx_power_next value,
1095 * it always need to be updated for newest request */
1096 priv
->tx_power_next
= tx_power
;
1098 /* do not set tx power when scanning or channel changing */
1099 defer
= test_bit(STATUS_SCANNING
, &priv
->status
) ||
1100 memcmp(&ctx
->active
, &ctx
->staging
, sizeof(ctx
->staging
));
1101 if (defer
&& !force
) {
1102 IWL_DEBUG_INFO(priv
, "Deferring tx power set\n");
1106 prev_tx_power
= priv
->tx_power_user_lmt
;
1107 priv
->tx_power_user_lmt
= tx_power
;
1109 ret
= iwlagn_send_tx_power(priv
);
1111 /* if fail to set tx_power, restore the orig. tx power */
1113 priv
->tx_power_user_lmt
= prev_tx_power
;
1114 priv
->tx_power_next
= prev_tx_power
;
1119 void iwl_send_bt_config(struct iwl_priv
*priv
)
1121 struct iwl_bt_cmd bt_cmd
= {
1122 .lead_time
= BT_LEAD_TIME_DEF
,
1123 .max_kill
= BT_MAX_KILL_DEF
,
1128 if (!iwlagn_mod_params
.bt_coex_active
)
1129 bt_cmd
.flags
= BT_COEX_DISABLE
;
1131 bt_cmd
.flags
= BT_COEX_ENABLE
;
1133 priv
->bt_enable_flag
= bt_cmd
.flags
;
1134 IWL_DEBUG_INFO(priv
, "BT coex %s\n",
1135 (bt_cmd
.flags
== BT_COEX_DISABLE
) ? "disable" : "active");
1137 if (trans_send_cmd_pdu(&priv
->trans
, REPLY_BT_CONFIG
,
1138 CMD_SYNC
, sizeof(struct iwl_bt_cmd
), &bt_cmd
))
1139 IWL_ERR(priv
, "failed to send BT Coex Config\n");
1142 int iwl_send_statistics_request(struct iwl_priv
*priv
, u8 flags
, bool clear
)
1144 struct iwl_statistics_cmd statistics_cmd
= {
1145 .configuration_flags
=
1146 clear
? IWL_STATS_CONF_CLEAR_STATS
: 0,
1149 if (flags
& CMD_ASYNC
)
1150 return trans_send_cmd_pdu(&priv
->trans
, REPLY_STATISTICS_CMD
,
1152 sizeof(struct iwl_statistics_cmd
),
1155 return trans_send_cmd_pdu(&priv
->trans
, REPLY_STATISTICS_CMD
,
1157 sizeof(struct iwl_statistics_cmd
),
1161 void iwl_clear_isr_stats(struct iwl_priv
*priv
)
1163 memset(&priv
->isr_stats
, 0, sizeof(priv
->isr_stats
));
1166 int iwl_mac_conf_tx(struct ieee80211_hw
*hw
, u16 queue
,
1167 const struct ieee80211_tx_queue_params
*params
)
1169 struct iwl_priv
*priv
= hw
->priv
;
1170 struct iwl_rxon_context
*ctx
;
1171 unsigned long flags
;
1174 IWL_DEBUG_MAC80211(priv
, "enter\n");
1176 if (!iwl_is_ready_rf(priv
)) {
1177 IWL_DEBUG_MAC80211(priv
, "leave - RF not ready\n");
1181 if (queue
>= AC_NUM
) {
1182 IWL_DEBUG_MAC80211(priv
, "leave - queue >= AC_NUM %d\n", queue
);
1186 q
= AC_NUM
- 1 - queue
;
1188 spin_lock_irqsave(&priv
->lock
, flags
);
1192 * This may need to be done per interface in nl80211/cfg80211/mac80211.
1194 for_each_context(priv
, ctx
) {
1195 ctx
->qos_data
.def_qos_parm
.ac
[q
].cw_min
=
1196 cpu_to_le16(params
->cw_min
);
1197 ctx
->qos_data
.def_qos_parm
.ac
[q
].cw_max
=
1198 cpu_to_le16(params
->cw_max
);
1199 ctx
->qos_data
.def_qos_parm
.ac
[q
].aifsn
= params
->aifs
;
1200 ctx
->qos_data
.def_qos_parm
.ac
[q
].edca_txop
=
1201 cpu_to_le16((params
->txop
* 32));
1203 ctx
->qos_data
.def_qos_parm
.ac
[q
].reserved1
= 0;
1206 spin_unlock_irqrestore(&priv
->lock
, flags
);
1208 IWL_DEBUG_MAC80211(priv
, "leave\n");
1212 int iwl_mac_tx_last_beacon(struct ieee80211_hw
*hw
)
1214 struct iwl_priv
*priv
= hw
->priv
;
1216 return priv
->ibss_manager
== IWL_IBSS_MANAGER
;
1219 static int iwl_set_mode(struct iwl_priv
*priv
, struct iwl_rxon_context
*ctx
)
1221 iwl_connection_init_rx_config(priv
, ctx
);
1223 iwlagn_set_rxon_chain(priv
, ctx
);
1225 return iwlagn_commit_rxon(priv
, ctx
);
1228 static int iwl_setup_interface(struct iwl_priv
*priv
,
1229 struct iwl_rxon_context
*ctx
)
1231 struct ieee80211_vif
*vif
= ctx
->vif
;
1234 lockdep_assert_held(&priv
->mutex
);
1237 * This variable will be correct only when there's just
1238 * a single context, but all code using it is for hardware
1239 * that supports only one context.
1241 priv
->iw_mode
= vif
->type
;
1243 ctx
->is_active
= true;
1245 err
= iwl_set_mode(priv
, ctx
);
1247 if (!ctx
->always_active
)
1248 ctx
->is_active
= false;
1252 if (priv
->cfg
->bt_params
&& priv
->cfg
->bt_params
->advanced_bt_coexist
&&
1253 vif
->type
== NL80211_IFTYPE_ADHOC
) {
1255 * pretend to have high BT traffic as long as we
1256 * are operating in IBSS mode, as this will cause
1257 * the rate scaling etc. to behave as intended.
1259 priv
->bt_traffic_load
= IWL_BT_COEX_TRAFFIC_LOAD_HIGH
;
1265 int iwl_mac_add_interface(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
)
1267 struct iwl_priv
*priv
= hw
->priv
;
1268 struct iwl_vif_priv
*vif_priv
= (void *)vif
->drv_priv
;
1269 struct iwl_rxon_context
*tmp
, *ctx
= NULL
;
1271 enum nl80211_iftype viftype
= ieee80211_vif_type_p2p(vif
);
1273 IWL_DEBUG_MAC80211(priv
, "enter: type %d, addr %pM\n",
1274 viftype
, vif
->addr
);
1276 cancel_delayed_work_sync(&priv
->hw_roc_disable_work
);
1278 mutex_lock(&priv
->mutex
);
1280 iwlagn_disable_roc(priv
);
1282 if (!iwl_is_ready_rf(priv
)) {
1283 IWL_WARN(priv
, "Try to add interface when device not ready\n");
1288 for_each_context(priv
, tmp
) {
1289 u32 possible_modes
=
1290 tmp
->interface_modes
| tmp
->exclusive_interface_modes
;
1293 /* check if this busy context is exclusive */
1294 if (tmp
->exclusive_interface_modes
&
1295 BIT(tmp
->vif
->type
)) {
1302 if (!(possible_modes
& BIT(viftype
)))
1305 /* have maybe usable context w/o interface */
1315 vif_priv
->ctx
= ctx
;
1318 err
= iwl_setup_interface(priv
, ctx
);
1323 priv
->iw_mode
= NL80211_IFTYPE_STATION
;
1325 mutex_unlock(&priv
->mutex
);
1327 IWL_DEBUG_MAC80211(priv
, "leave\n");
1331 static void iwl_teardown_interface(struct iwl_priv
*priv
,
1332 struct ieee80211_vif
*vif
,
1335 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
1337 lockdep_assert_held(&priv
->mutex
);
1339 if (priv
->scan_vif
== vif
) {
1340 iwl_scan_cancel_timeout(priv
, 200);
1341 iwl_force_scan_end(priv
);
1345 iwl_set_mode(priv
, ctx
);
1346 if (!ctx
->always_active
)
1347 ctx
->is_active
= false;
1351 * When removing the IBSS interface, overwrite the
1352 * BT traffic load with the stored one from the last
1353 * notification, if any. If this is a device that
1354 * doesn't implement this, this has no effect since
1355 * both values are the same and zero.
1357 if (vif
->type
== NL80211_IFTYPE_ADHOC
)
1358 priv
->bt_traffic_load
= priv
->last_bt_traffic_load
;
1361 void iwl_mac_remove_interface(struct ieee80211_hw
*hw
,
1362 struct ieee80211_vif
*vif
)
1364 struct iwl_priv
*priv
= hw
->priv
;
1365 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
1367 IWL_DEBUG_MAC80211(priv
, "enter\n");
1369 mutex_lock(&priv
->mutex
);
1371 WARN_ON(ctx
->vif
!= vif
);
1374 iwl_teardown_interface(priv
, vif
, false);
1376 mutex_unlock(&priv
->mutex
);
1378 IWL_DEBUG_MAC80211(priv
, "leave\n");
1382 #ifdef CONFIG_IWLWIFI_DEBUGFS
1384 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1386 void iwl_reset_traffic_log(struct iwl_priv
*priv
)
1388 priv
->tx_traffic_idx
= 0;
1389 priv
->rx_traffic_idx
= 0;
1390 if (priv
->tx_traffic
)
1391 memset(priv
->tx_traffic
, 0, IWL_TRAFFIC_DUMP_SIZE
);
1392 if (priv
->rx_traffic
)
1393 memset(priv
->rx_traffic
, 0, IWL_TRAFFIC_DUMP_SIZE
);
1396 int iwl_alloc_traffic_mem(struct iwl_priv
*priv
)
1398 u32 traffic_size
= IWL_TRAFFIC_DUMP_SIZE
;
1400 if (iwl_get_debug_level(priv
->shrd
) & IWL_DL_TX
) {
1401 if (!priv
->tx_traffic
) {
1403 kzalloc(traffic_size
, GFP_KERNEL
);
1404 if (!priv
->tx_traffic
)
1408 if (iwl_get_debug_level(priv
->shrd
) & IWL_DL_RX
) {
1409 if (!priv
->rx_traffic
) {
1411 kzalloc(traffic_size
, GFP_KERNEL
);
1412 if (!priv
->rx_traffic
)
1416 iwl_reset_traffic_log(priv
);
1420 void iwl_free_traffic_mem(struct iwl_priv
*priv
)
1422 kfree(priv
->tx_traffic
);
1423 priv
->tx_traffic
= NULL
;
1425 kfree(priv
->rx_traffic
);
1426 priv
->rx_traffic
= NULL
;
1429 void iwl_dbg_log_tx_data_frame(struct iwl_priv
*priv
,
1430 u16 length
, struct ieee80211_hdr
*header
)
1435 if (likely(!(iwl_get_debug_level(priv
->shrd
) & IWL_DL_TX
)))
1438 if (!priv
->tx_traffic
)
1441 fc
= header
->frame_control
;
1442 if (ieee80211_is_data(fc
)) {
1443 len
= (length
> IWL_TRAFFIC_ENTRY_SIZE
)
1444 ? IWL_TRAFFIC_ENTRY_SIZE
: length
;
1445 memcpy((priv
->tx_traffic
+
1446 (priv
->tx_traffic_idx
* IWL_TRAFFIC_ENTRY_SIZE
)),
1448 priv
->tx_traffic_idx
=
1449 (priv
->tx_traffic_idx
+ 1) % IWL_TRAFFIC_ENTRIES
;
1453 void iwl_dbg_log_rx_data_frame(struct iwl_priv
*priv
,
1454 u16 length
, struct ieee80211_hdr
*header
)
1459 if (likely(!(iwl_get_debug_level(priv
->shrd
) & IWL_DL_RX
)))
1462 if (!priv
->rx_traffic
)
1465 fc
= header
->frame_control
;
1466 if (ieee80211_is_data(fc
)) {
1467 len
= (length
> IWL_TRAFFIC_ENTRY_SIZE
)
1468 ? IWL_TRAFFIC_ENTRY_SIZE
: length
;
1469 memcpy((priv
->rx_traffic
+
1470 (priv
->rx_traffic_idx
* IWL_TRAFFIC_ENTRY_SIZE
)),
1472 priv
->rx_traffic_idx
=
1473 (priv
->rx_traffic_idx
+ 1) % IWL_TRAFFIC_ENTRIES
;
1477 const char *get_mgmt_string(int cmd
)
1480 IWL_CMD(MANAGEMENT_ASSOC_REQ
);
1481 IWL_CMD(MANAGEMENT_ASSOC_RESP
);
1482 IWL_CMD(MANAGEMENT_REASSOC_REQ
);
1483 IWL_CMD(MANAGEMENT_REASSOC_RESP
);
1484 IWL_CMD(MANAGEMENT_PROBE_REQ
);
1485 IWL_CMD(MANAGEMENT_PROBE_RESP
);
1486 IWL_CMD(MANAGEMENT_BEACON
);
1487 IWL_CMD(MANAGEMENT_ATIM
);
1488 IWL_CMD(MANAGEMENT_DISASSOC
);
1489 IWL_CMD(MANAGEMENT_AUTH
);
1490 IWL_CMD(MANAGEMENT_DEAUTH
);
1491 IWL_CMD(MANAGEMENT_ACTION
);
1498 const char *get_ctrl_string(int cmd
)
1501 IWL_CMD(CONTROL_BACK_REQ
);
1502 IWL_CMD(CONTROL_BACK
);
1503 IWL_CMD(CONTROL_PSPOLL
);
1504 IWL_CMD(CONTROL_RTS
);
1505 IWL_CMD(CONTROL_CTS
);
1506 IWL_CMD(CONTROL_ACK
);
1507 IWL_CMD(CONTROL_CFEND
);
1508 IWL_CMD(CONTROL_CFENDACK
);
1515 void iwl_clear_traffic_stats(struct iwl_priv
*priv
)
1517 memset(&priv
->tx_stats
, 0, sizeof(struct traffic_stats
));
1518 memset(&priv
->rx_stats
, 0, sizeof(struct traffic_stats
));
1522 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1523 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1524 * Use debugFs to display the rx/rx_statistics
1525 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1526 * information will be recorded, but DATA pkt still will be recorded
1527 * for the reason of iwl_led.c need to control the led blinking based on
1528 * number of tx and rx data.
1531 void iwl_update_stats(struct iwl_priv
*priv
, bool is_tx
, __le16 fc
, u16 len
)
1533 struct traffic_stats
*stats
;
1536 stats
= &priv
->tx_stats
;
1538 stats
= &priv
->rx_stats
;
1540 if (ieee80211_is_mgmt(fc
)) {
1541 switch (fc
& cpu_to_le16(IEEE80211_FCTL_STYPE
)) {
1542 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ
):
1543 stats
->mgmt
[MANAGEMENT_ASSOC_REQ
]++;
1545 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP
):
1546 stats
->mgmt
[MANAGEMENT_ASSOC_RESP
]++;
1548 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ
):
1549 stats
->mgmt
[MANAGEMENT_REASSOC_REQ
]++;
1551 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP
):
1552 stats
->mgmt
[MANAGEMENT_REASSOC_RESP
]++;
1554 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
):
1555 stats
->mgmt
[MANAGEMENT_PROBE_REQ
]++;
1557 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP
):
1558 stats
->mgmt
[MANAGEMENT_PROBE_RESP
]++;
1560 case cpu_to_le16(IEEE80211_STYPE_BEACON
):
1561 stats
->mgmt
[MANAGEMENT_BEACON
]++;
1563 case cpu_to_le16(IEEE80211_STYPE_ATIM
):
1564 stats
->mgmt
[MANAGEMENT_ATIM
]++;
1566 case cpu_to_le16(IEEE80211_STYPE_DISASSOC
):
1567 stats
->mgmt
[MANAGEMENT_DISASSOC
]++;
1569 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
1570 stats
->mgmt
[MANAGEMENT_AUTH
]++;
1572 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
1573 stats
->mgmt
[MANAGEMENT_DEAUTH
]++;
1575 case cpu_to_le16(IEEE80211_STYPE_ACTION
):
1576 stats
->mgmt
[MANAGEMENT_ACTION
]++;
1579 } else if (ieee80211_is_ctl(fc
)) {
1580 switch (fc
& cpu_to_le16(IEEE80211_FCTL_STYPE
)) {
1581 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ
):
1582 stats
->ctrl
[CONTROL_BACK_REQ
]++;
1584 case cpu_to_le16(IEEE80211_STYPE_BACK
):
1585 stats
->ctrl
[CONTROL_BACK
]++;
1587 case cpu_to_le16(IEEE80211_STYPE_PSPOLL
):
1588 stats
->ctrl
[CONTROL_PSPOLL
]++;
1590 case cpu_to_le16(IEEE80211_STYPE_RTS
):
1591 stats
->ctrl
[CONTROL_RTS
]++;
1593 case cpu_to_le16(IEEE80211_STYPE_CTS
):
1594 stats
->ctrl
[CONTROL_CTS
]++;
1596 case cpu_to_le16(IEEE80211_STYPE_ACK
):
1597 stats
->ctrl
[CONTROL_ACK
]++;
1599 case cpu_to_le16(IEEE80211_STYPE_CFEND
):
1600 stats
->ctrl
[CONTROL_CFEND
]++;
1602 case cpu_to_le16(IEEE80211_STYPE_CFENDACK
):
1603 stats
->ctrl
[CONTROL_CFENDACK
]++;
1609 stats
->data_bytes
+= len
;
1614 static void iwl_force_rf_reset(struct iwl_priv
*priv
)
1616 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
1619 if (!iwl_is_any_associated(priv
)) {
1620 IWL_DEBUG_SCAN(priv
, "force reset rejected: not associated\n");
1624 * There is no easy and better way to force reset the radio,
1625 * the only known method is switching channel which will force to
1626 * reset and tune the radio.
1627 * Use internal short scan (single channel) operation to should
1628 * achieve this objective.
1629 * Driver should reset the radio when number of consecutive missed
1630 * beacon, or any other uCode error condition detected.
1632 IWL_DEBUG_INFO(priv
, "perform radio reset.\n");
1633 iwl_internal_short_hw_scan(priv
);
1637 int iwl_force_reset(struct iwl_priv
*priv
, int mode
, bool external
)
1639 struct iwl_force_reset
*force_reset
;
1641 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
1644 if (mode
>= IWL_MAX_FORCE_RESET
) {
1645 IWL_DEBUG_INFO(priv
, "invalid reset request.\n");
1648 force_reset
= &priv
->force_reset
[mode
];
1649 force_reset
->reset_request_count
++;
1651 if (force_reset
->last_force_reset_jiffies
&&
1652 time_after(force_reset
->last_force_reset_jiffies
+
1653 force_reset
->reset_duration
, jiffies
)) {
1654 IWL_DEBUG_INFO(priv
, "force reset rejected\n");
1655 force_reset
->reset_reject_count
++;
1659 force_reset
->reset_success_count
++;
1660 force_reset
->last_force_reset_jiffies
= jiffies
;
1661 IWL_DEBUG_INFO(priv
, "perform force reset (%d)\n", mode
);
1664 iwl_force_rf_reset(priv
);
1668 * if the request is from external(ex: debugfs),
1669 * then always perform the request in regardless the module
1671 * if the request is from internal (uCode error or driver
1672 * detect failure), then fw_restart module parameter
1673 * need to be check before performing firmware reload
1675 if (!external
&& !iwlagn_mod_params
.restart_fw
) {
1676 IWL_DEBUG_INFO(priv
, "Cancel firmware reload based on "
1677 "module parameter setting\n");
1680 IWL_ERR(priv
, "On demand firmware reload\n");
1681 iwlagn_fw_error(priv
, true);
1687 int iwl_mac_change_interface(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
1688 enum nl80211_iftype newtype
, bool newp2p
)
1690 struct iwl_priv
*priv
= hw
->priv
;
1691 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
1692 struct iwl_rxon_context
*bss_ctx
= &priv
->contexts
[IWL_RXON_CTX_BSS
];
1693 struct iwl_rxon_context
*tmp
;
1694 enum nl80211_iftype newviftype
= newtype
;
1695 u32 interface_modes
;
1698 newtype
= ieee80211_iftype_p2p(newtype
, newp2p
);
1700 mutex_lock(&priv
->mutex
);
1702 if (!ctx
->vif
|| !iwl_is_ready_rf(priv
)) {
1704 * Huh? But wait ... this can maybe happen when
1705 * we're in the middle of a firmware restart!
1711 interface_modes
= ctx
->interface_modes
| ctx
->exclusive_interface_modes
;
1713 if (!(interface_modes
& BIT(newtype
))) {
1719 * Refuse a change that should be done by moving from the PAN
1720 * context to the BSS context instead, if the BSS context is
1721 * available and can support the new interface type.
1723 if (ctx
->ctxid
== IWL_RXON_CTX_PAN
&& !bss_ctx
->vif
&&
1724 (bss_ctx
->interface_modes
& BIT(newtype
) ||
1725 bss_ctx
->exclusive_interface_modes
& BIT(newtype
))) {
1726 BUILD_BUG_ON(NUM_IWL_RXON_CTX
!= 2);
1731 if (ctx
->exclusive_interface_modes
& BIT(newtype
)) {
1732 for_each_context(priv
, tmp
) {
1740 * The current mode switch would be exclusive, but
1741 * another context is active ... refuse the switch.
1749 iwl_teardown_interface(priv
, vif
, true);
1750 vif
->type
= newviftype
;
1752 err
= iwl_setup_interface(priv
, ctx
);
1755 * We've switched internally, but submitting to the
1756 * device may have failed for some reason. Mask this
1757 * error, because otherwise mac80211 will not switch
1758 * (and set the interface type back) and we'll be
1759 * out of sync with it.
1764 mutex_unlock(&priv
->mutex
);
1769 * On every watchdog tick we check (latest) time stamp. If it does not
1770 * change during timeout period and queue is not empty we reset firmware.
1772 static int iwl_check_stuck_queue(struct iwl_priv
*priv
, int cnt
)
1774 struct iwl_tx_queue
*txq
= &priv
->txq
[cnt
];
1775 struct iwl_queue
*q
= &txq
->q
;
1776 unsigned long timeout
;
1779 if (q
->read_ptr
== q
->write_ptr
) {
1780 txq
->time_stamp
= jiffies
;
1784 timeout
= txq
->time_stamp
+
1785 msecs_to_jiffies(priv
->cfg
->base_params
->wd_timeout
);
1787 if (time_after(jiffies
, timeout
)) {
1788 IWL_ERR(priv
, "Queue %d stuck for %u ms.\n",
1789 q
->id
, priv
->cfg
->base_params
->wd_timeout
);
1790 ret
= iwl_force_reset(priv
, IWL_FW_RESET
, false);
1791 return (ret
== -EAGAIN
) ? 0 : 1;
1798 * Making watchdog tick be a quarter of timeout assure we will
1799 * discover the queue hung between timeout and 1.25*timeout
1801 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1804 * Watchdog timer callback, we check each tx queue for stuck, if if hung
1805 * we reset the firmware. If everything is fine just rearm the timer.
1807 void iwl_bg_watchdog(unsigned long data
)
1809 struct iwl_priv
*priv
= (struct iwl_priv
*)data
;
1811 unsigned long timeout
;
1813 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
1816 timeout
= priv
->cfg
->base_params
->wd_timeout
;
1820 /* monitor and check for stuck cmd queue */
1821 if (iwl_check_stuck_queue(priv
, priv
->shrd
->cmd_queue
))
1824 /* monitor and check for other stuck queues */
1825 if (iwl_is_any_associated(priv
)) {
1826 for (cnt
= 0; cnt
< hw_params(priv
).max_txq_num
; cnt
++) {
1827 /* skip as we already checked the command queue */
1828 if (cnt
== priv
->shrd
->cmd_queue
)
1830 if (iwl_check_stuck_queue(priv
, cnt
))
1835 mod_timer(&priv
->watchdog
, jiffies
+
1836 msecs_to_jiffies(IWL_WD_TICK(timeout
)));
1839 void iwl_setup_watchdog(struct iwl_priv
*priv
)
1841 unsigned int timeout
= priv
->cfg
->base_params
->wd_timeout
;
1843 if (timeout
&& !iwlagn_mod_params
.wd_disable
)
1844 mod_timer(&priv
->watchdog
,
1845 jiffies
+ msecs_to_jiffies(IWL_WD_TICK(timeout
)));
1847 del_timer(&priv
->watchdog
);
1851 * extended beacon time format
1852 * time in usec will be changed into a 32-bit value in extended:internal format
1853 * the extended part is the beacon counts
1854 * the internal part is the time in usec within one beacon interval
1856 u32
iwl_usecs_to_beacons(struct iwl_priv
*priv
, u32 usec
, u32 beacon_interval
)
1860 u32 interval
= beacon_interval
* TIME_UNIT
;
1862 if (!interval
|| !usec
)
1865 quot
= (usec
/ interval
) &
1866 (iwl_beacon_time_mask_high(priv
,
1867 hw_params(priv
).beacon_time_tsf_bits
) >>
1868 hw_params(priv
).beacon_time_tsf_bits
);
1869 rem
= (usec
% interval
) & iwl_beacon_time_mask_low(priv
,
1870 hw_params(priv
).beacon_time_tsf_bits
);
1872 return (quot
<< hw_params(priv
).beacon_time_tsf_bits
) + rem
;
1875 /* base is usually what we get from ucode with each received frame,
1876 * the same as HW timer counter counting down
1878 __le32
iwl_add_beacon_time(struct iwl_priv
*priv
, u32 base
,
1879 u32 addon
, u32 beacon_interval
)
1881 u32 base_low
= base
& iwl_beacon_time_mask_low(priv
,
1882 hw_params(priv
).beacon_time_tsf_bits
);
1883 u32 addon_low
= addon
& iwl_beacon_time_mask_low(priv
,
1884 hw_params(priv
).beacon_time_tsf_bits
);
1885 u32 interval
= beacon_interval
* TIME_UNIT
;
1886 u32 res
= (base
& iwl_beacon_time_mask_high(priv
,
1887 hw_params(priv
).beacon_time_tsf_bits
)) +
1888 (addon
& iwl_beacon_time_mask_high(priv
,
1889 hw_params(priv
).beacon_time_tsf_bits
));
1891 if (base_low
> addon_low
)
1892 res
+= base_low
- addon_low
;
1893 else if (base_low
< addon_low
) {
1894 res
+= interval
+ base_low
- addon_low
;
1895 res
+= (1 << hw_params(priv
).beacon_time_tsf_bits
);
1897 res
+= (1 << hw_params(priv
).beacon_time_tsf_bits
);
1899 return cpu_to_le32(res
);
1904 int iwl_suspend(struct iwl_priv
*priv
)
1907 * This function is called when system goes into suspend state
1908 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
1909 * first but since iwl_mac_stop() has no knowledge of who the caller is,
1910 * it will not call apm_ops.stop() to stop the DMA operation.
1911 * Calling apm_ops.stop here to make sure we stop the DMA.
1913 * But of course ... if we have configured WoWLAN then we did other
1914 * things already :-)
1922 int iwl_resume(struct iwl_priv
*priv
)
1924 bool hw_rfkill
= false;
1926 iwl_enable_interrupts(priv
);
1928 if (!(iwl_read32(priv
, CSR_GP_CNTRL
) &
1929 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW
))
1933 set_bit(STATUS_RF_KILL_HW
, &priv
->status
);
1935 clear_bit(STATUS_RF_KILL_HW
, &priv
->status
);
1937 wiphy_rfkill_set_hw_state(priv
->hw
->wiphy
, hw_rfkill
);
1942 #endif /* CONFIG_PM */