1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *****************************************************************************/
64 #include "iwl-trans.h"
69 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
71 * Copies the phy information in mvm->last_phy_info, it will be used when the
72 * actual data will come from the fw in the next packet.
74 int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
75 struct iwl_device_cmd
*cmd
)
77 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
79 memcpy(&mvm
->last_phy_info
, pkt
->data
, sizeof(mvm
->last_phy_info
));
82 #ifdef CONFIG_IWLWIFI_DEBUGFS
83 if (mvm
->last_phy_info
.phy_flags
& cpu_to_le16(RX_RES_PHY_FLAGS_AGG
)) {
84 spin_lock(&mvm
->drv_stats_lock
);
85 mvm
->drv_rx_stats
.ampdu_count
++;
86 spin_unlock(&mvm
->drv_stats_lock
);
94 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
96 * Adds the rxb to a new skb and give it to mac80211
98 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm
*mvm
,
99 struct ieee80211_hdr
*hdr
, u16 len
,
101 struct iwl_rx_cmd_buffer
*rxb
,
102 struct ieee80211_rx_status
*stats
)
105 unsigned int hdrlen
, fraglen
;
107 /* Dont use dev_alloc_skb(), we'll have enough headroom once
108 * ieee80211_hdr pulled.
110 skb
= alloc_skb(128, GFP_ATOMIC
);
112 IWL_ERR(mvm
, "alloc_skb failed\n");
115 /* If frame is small enough to fit in skb->head, pull it completely.
116 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
117 * are more efficient.
119 hdrlen
= (len
<= skb_tailroom(skb
)) ? len
: sizeof(*hdr
);
121 memcpy(skb_put(skb
, hdrlen
), hdr
, hdrlen
);
122 fraglen
= len
- hdrlen
;
125 int offset
= (void *)hdr
+ hdrlen
-
126 rxb_addr(rxb
) + rxb_offset(rxb
);
128 skb_add_rx_frag(skb
, 0, rxb_steal_page(rxb
), offset
,
129 fraglen
, rxb
->truesize
);
132 memcpy(IEEE80211_SKB_RXCB(skb
), stats
, sizeof(*stats
));
134 ieee80211_rx(mvm
->hw
, skb
);
138 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
139 * values are reported by the fw as positive values - need to negate
140 * to obtain their dBM. Account for missing antennas by replacing 0
141 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
143 static void iwl_mvm_get_signal_strength(struct iwl_mvm
*mvm
,
144 struct iwl_rx_phy_info
*phy_info
,
145 struct ieee80211_rx_status
*rx_status
)
147 int energy_a
, energy_b
, energy_c
, max_energy
;
151 le32_to_cpu(phy_info
->non_cfg_phy
[IWL_RX_INFO_ENERGY_ANT_ABC_IDX
]);
152 energy_a
= (val
& IWL_RX_INFO_ENERGY_ANT_A_MSK
) >>
153 IWL_RX_INFO_ENERGY_ANT_A_POS
;
154 energy_a
= energy_a
? -energy_a
: S8_MIN
;
155 energy_b
= (val
& IWL_RX_INFO_ENERGY_ANT_B_MSK
) >>
156 IWL_RX_INFO_ENERGY_ANT_B_POS
;
157 energy_b
= energy_b
? -energy_b
: S8_MIN
;
158 energy_c
= (val
& IWL_RX_INFO_ENERGY_ANT_C_MSK
) >>
159 IWL_RX_INFO_ENERGY_ANT_C_POS
;
160 energy_c
= energy_c
? -energy_c
: S8_MIN
;
161 max_energy
= max(energy_a
, energy_b
);
162 max_energy
= max(max_energy
, energy_c
);
164 IWL_DEBUG_STATS(mvm
, "energy In A %d B %d C %d , and max %d\n",
165 energy_a
, energy_b
, energy_c
, max_energy
);
167 rx_status
->signal
= max_energy
;
168 rx_status
->chains
= (le16_to_cpu(phy_info
->phy_flags
) &
169 RX_RES_PHY_FLAGS_ANTENNA
)
170 >> RX_RES_PHY_FLAGS_ANTENNA_POS
;
171 rx_status
->chain_signal
[0] = energy_a
;
172 rx_status
->chain_signal
[1] = energy_b
;
173 rx_status
->chain_signal
[2] = energy_c
;
177 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
178 * @mvm: the mvm object
180 * @stats: status in mac80211's format
181 * @rx_pkt_status: status coming from fw
183 * returns non 0 value if the packet should be dropped
185 static u32
iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm
*mvm
,
186 struct ieee80211_hdr
*hdr
,
187 struct ieee80211_rx_status
*stats
,
190 if (!ieee80211_has_protected(hdr
->frame_control
) ||
191 (rx_pkt_status
& RX_MPDU_RES_STATUS_SEC_ENC_MSK
) ==
192 RX_MPDU_RES_STATUS_SEC_NO_ENC
)
195 /* packet was encrypted with unknown alg */
196 if ((rx_pkt_status
& RX_MPDU_RES_STATUS_SEC_ENC_MSK
) ==
197 RX_MPDU_RES_STATUS_SEC_ENC_ERR
)
200 switch (rx_pkt_status
& RX_MPDU_RES_STATUS_SEC_ENC_MSK
) {
201 case RX_MPDU_RES_STATUS_SEC_CCM_ENC
:
202 /* alg is CCM: check MIC only */
203 if (!(rx_pkt_status
& RX_MPDU_RES_STATUS_MIC_OK
))
206 stats
->flag
|= RX_FLAG_DECRYPTED
;
207 IWL_DEBUG_WEP(mvm
, "hw decrypted CCMP successfully\n");
210 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC
:
211 /* Don't drop the frame and decrypt it in SW */
212 if (!(rx_pkt_status
& RX_MPDU_RES_STATUS_TTAK_OK
))
214 /* fall through if TTAK OK */
216 case RX_MPDU_RES_STATUS_SEC_WEP_ENC
:
217 if (!(rx_pkt_status
& RX_MPDU_RES_STATUS_ICV_OK
))
220 stats
->flag
|= RX_FLAG_DECRYPTED
;
223 case RX_MPDU_RES_STATUS_SEC_EXT_ENC
:
224 if (!(rx_pkt_status
& RX_MPDU_RES_STATUS_MIC_OK
))
226 stats
->flag
|= RX_FLAG_DECRYPTED
;
230 IWL_ERR(mvm
, "Unhandled alg: 0x%x\n", rx_pkt_status
);
237 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
239 * Handles the actual data of the Rx packet from the fw
241 int iwl_mvm_rx_rx_mpdu(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
242 struct iwl_device_cmd
*cmd
)
244 struct ieee80211_hdr
*hdr
;
245 struct ieee80211_rx_status rx_status
= {};
246 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
247 struct iwl_rx_phy_info
*phy_info
;
248 struct iwl_rx_mpdu_res_start
*rx_res
;
249 struct ieee80211_sta
*sta
;
255 phy_info
= &mvm
->last_phy_info
;
256 rx_res
= (struct iwl_rx_mpdu_res_start
*)pkt
->data
;
257 hdr
= (struct ieee80211_hdr
*)(pkt
->data
+ sizeof(*rx_res
));
258 len
= le16_to_cpu(rx_res
->byte_count
);
259 rx_pkt_status
= le32_to_cpup((__le32
*)
260 (pkt
->data
+ sizeof(*rx_res
) + len
));
262 memset(&rx_status
, 0, sizeof(rx_status
));
265 * drop the packet if it has failed being decrypted by HW
267 if (iwl_mvm_set_mac80211_rx_flag(mvm
, hdr
, &rx_status
, rx_pkt_status
)) {
268 IWL_DEBUG_DROP(mvm
, "Bad decryption results 0x%08x\n",
273 if ((unlikely(phy_info
->cfg_phy_cnt
> 20))) {
274 IWL_DEBUG_DROP(mvm
, "dsp size out of range [0,20]: %d\n",
275 phy_info
->cfg_phy_cnt
);
280 * Keep packets with CRC errors (and with overrun) for monitor mode
281 * (otherwise the firmware discards them) but mark them as bad.
283 if (!(rx_pkt_status
& RX_MPDU_RES_STATUS_CRC_OK
) ||
284 !(rx_pkt_status
& RX_MPDU_RES_STATUS_OVERRUN_OK
)) {
285 IWL_DEBUG_RX(mvm
, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status
);
286 rx_status
.flag
|= RX_FLAG_FAILED_FCS_CRC
;
289 /* This will be used in several places later */
290 rate_n_flags
= le32_to_cpu(phy_info
->rate_n_flags
);
292 /* rx_status carries information about the packet to mac80211 */
293 rx_status
.mactime
= le64_to_cpu(phy_info
->timestamp
);
294 rx_status
.device_timestamp
= le32_to_cpu(phy_info
->system_timestamp
);
296 (phy_info
->phy_flags
& cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24
)) ?
297 IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
299 ieee80211_channel_to_frequency(le16_to_cpu(phy_info
->channel
),
302 * TSF as indicated by the fw is at INA time, but mac80211 expects the
303 * TSF at the beginning of the MPDU.
305 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
307 iwl_mvm_get_signal_strength(mvm
, phy_info
, &rx_status
);
309 IWL_DEBUG_STATS_LIMIT(mvm
, "Rssi %d, TSF %llu\n", rx_status
.signal
,
310 (unsigned long long)rx_status
.mactime
);
314 * We have tx blocked stations (with CS bit). If we heard frames from
315 * a blocked station on a new channel we can TX to it again.
317 if (unlikely(mvm
->csa_tx_block_bcn_timeout
)) {
318 sta
= ieee80211_find_sta(
319 rcu_dereference(mvm
->csa_tx_blocked_vif
), hdr
->addr2
);
321 iwl_mvm_sta_modify_disable_tx_ap(mvm
, sta
, false);
324 /* This is fine since we don't support multiple AP interfaces */
325 sta
= ieee80211_find_sta_by_ifaddr(mvm
->hw
, hdr
->addr2
, NULL
);
327 struct iwl_mvm_sta
*mvmsta
;
328 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
329 rs_update_last_rssi(mvm
, &mvmsta
->lq_sta
,
335 /* set the preamble flag if appropriate */
336 if (phy_info
->phy_flags
& cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE
))
337 rx_status
.flag
|= RX_FLAG_SHORTPRE
;
339 if (phy_info
->phy_flags
& cpu_to_le16(RX_RES_PHY_FLAGS_AGG
)) {
341 * We know which subframes of an A-MPDU belong
342 * together since we get a single PHY response
343 * from the firmware for all of them
345 rx_status
.flag
|= RX_FLAG_AMPDU_DETAILS
;
346 rx_status
.ampdu_reference
= mvm
->ampdu_ref
;
349 /* Set up the HT phy flags */
350 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
351 case RATE_MCS_CHAN_WIDTH_20
:
353 case RATE_MCS_CHAN_WIDTH_40
:
354 rx_status
.flag
|= RX_FLAG_40MHZ
;
356 case RATE_MCS_CHAN_WIDTH_80
:
357 rx_status
.vht_flag
|= RX_VHT_FLAG_80MHZ
;
359 case RATE_MCS_CHAN_WIDTH_160
:
360 rx_status
.vht_flag
|= RX_VHT_FLAG_160MHZ
;
363 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
364 rx_status
.flag
|= RX_FLAG_SHORT_GI
;
365 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
366 rx_status
.flag
|= RX_FLAG_HT_GF
;
367 if (rate_n_flags
& RATE_MCS_LDPC_MSK
)
368 rx_status
.flag
|= RX_FLAG_LDPC
;
369 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
370 u8 stbc
= (rate_n_flags
& RATE_MCS_HT_STBC_MSK
) >>
372 rx_status
.flag
|= RX_FLAG_HT
;
373 rx_status
.rate_idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
374 rx_status
.flag
|= stbc
<< RX_FLAG_STBC_SHIFT
;
375 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
376 u8 stbc
= (rate_n_flags
& RATE_MCS_VHT_STBC_MSK
) >>
379 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
380 RATE_VHT_MCS_NSS_POS
) + 1;
381 rx_status
.rate_idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
382 rx_status
.flag
|= RX_FLAG_VHT
;
383 rx_status
.flag
|= stbc
<< RX_FLAG_STBC_SHIFT
;
384 if (rate_n_flags
& RATE_MCS_BF_MSK
)
385 rx_status
.vht_flag
|= RX_VHT_FLAG_BF
;
388 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
392 #ifdef CONFIG_IWLWIFI_DEBUGFS
393 iwl_mvm_update_frame_stats(mvm
, &mvm
->drv_rx_stats
, rate_n_flags
,
394 rx_status
.flag
& RX_FLAG_AMPDU_DETAILS
);
396 iwl_mvm_pass_packet_to_mac80211(mvm
, hdr
, len
, ampdu_status
,
401 static void iwl_mvm_update_rx_statistics(struct iwl_mvm
*mvm
,
402 struct iwl_notif_statistics
*stats
)
405 * NOTE FW aggregates the statistics - BUT the statistics are cleared
406 * when the driver issues REPLY_STATISTICS_CMD 0x9c with CLEAR_STATS
409 lockdep_assert_held(&mvm
->mutex
);
410 memcpy(&mvm
->rx_stats
, &stats
->rx
, sizeof(struct mvm_statistics_rx
));
413 struct iwl_mvm_stat_data
{
414 struct iwl_notif_statistics
*stats
;
418 static void iwl_mvm_stat_iterator(void *_data
, u8
*mac
,
419 struct ieee80211_vif
*vif
)
421 struct iwl_mvm_stat_data
*data
= _data
;
422 struct iwl_notif_statistics
*stats
= data
->stats
;
423 struct iwl_mvm
*mvm
= data
->mvm
;
424 int sig
= -stats
->general
.beacon_filter_average_energy
;
426 int thold
= vif
->bss_conf
.cqm_rssi_thold
;
427 int hyst
= vif
->bss_conf
.cqm_rssi_hyst
;
428 u16 id
= le32_to_cpu(stats
->rx
.general
.mac_id
);
429 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
431 if (mvmvif
->id
!= id
)
434 if (vif
->type
!= NL80211_IFTYPE_STATION
)
437 mvmvif
->bf_data
.ave_beacon_signal
= sig
;
440 if (mvmvif
->bf_data
.bt_coex_min_thold
!=
441 mvmvif
->bf_data
.bt_coex_max_thold
) {
442 last_event
= mvmvif
->bf_data
.last_bt_coex_event
;
443 if (sig
> mvmvif
->bf_data
.bt_coex_max_thold
&&
444 (last_event
<= mvmvif
->bf_data
.bt_coex_min_thold
||
446 mvmvif
->bf_data
.last_bt_coex_event
= sig
;
447 IWL_DEBUG_RX(mvm
, "cqm_iterator bt coex high %d\n",
449 iwl_mvm_bt_rssi_event(mvm
, vif
, RSSI_EVENT_HIGH
);
450 } else if (sig
< mvmvif
->bf_data
.bt_coex_min_thold
&&
451 (last_event
>= mvmvif
->bf_data
.bt_coex_max_thold
||
453 mvmvif
->bf_data
.last_bt_coex_event
= sig
;
454 IWL_DEBUG_RX(mvm
, "cqm_iterator bt coex low %d\n",
456 iwl_mvm_bt_rssi_event(mvm
, vif
, RSSI_EVENT_LOW
);
460 if (!(vif
->driver_flags
& IEEE80211_VIF_SUPPORTS_CQM_RSSI
))
463 /* CQM Notification */
464 last_event
= mvmvif
->bf_data
.last_cqm_event
;
465 if (thold
&& sig
< thold
&& (last_event
== 0 ||
466 sig
< last_event
- hyst
)) {
467 mvmvif
->bf_data
.last_cqm_event
= sig
;
468 IWL_DEBUG_RX(mvm
, "cqm_iterator cqm low %d\n",
470 ieee80211_cqm_rssi_notify(
472 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
474 } else if (sig
> thold
&&
475 (last_event
== 0 || sig
> last_event
+ hyst
)) {
476 mvmvif
->bf_data
.last_cqm_event
= sig
;
477 IWL_DEBUG_RX(mvm
, "cqm_iterator cqm high %d\n",
479 ieee80211_cqm_rssi_notify(
481 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
487 * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler
489 * TODO: This handler is implemented partially.
491 int iwl_mvm_rx_statistics(struct iwl_mvm
*mvm
,
492 struct iwl_rx_cmd_buffer
*rxb
,
493 struct iwl_device_cmd
*cmd
)
495 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
496 struct iwl_notif_statistics
*stats
= (void *)&pkt
->data
;
497 struct mvm_statistics_general_common
*common
= &stats
->general
.common
;
498 struct iwl_mvm_stat_data data
= {
504 * set temperature debug enabled - ignore FW temperature updates
505 * and use the user set temperature.
507 if (mvm
->temperature_test
) {
508 if (mvm
->temperature
< le32_to_cpu(common
->temperature
))
510 "Ignoring FW temperature update that is greater than the debug set temperature (debug temp = %d, fw temp = %d)\n",
512 le32_to_cpu(common
->temperature
));
514 * skip iwl_mvm_tt_handler since we are in
515 * temperature debug mode and we are ignoring
516 * the new temperature value
521 if (mvm
->temperature
!= le32_to_cpu(common
->temperature
)) {
522 mvm
->temperature
= le32_to_cpu(common
->temperature
);
523 iwl_mvm_tt_handler(mvm
);
526 iwl_mvm_update_rx_statistics(mvm
, stats
);
528 ieee80211_iterate_active_interfaces(mvm
->hw
,
529 IEEE80211_IFACE_ITER_NORMAL
,
530 iwl_mvm_stat_iterator
,