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tegrakernel/kernel/kernel-4.9/drivers/net/wireless/intel/iwlwifi/mvm/rx.c

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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
#include <asm/unaligned.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "iwl-trans.h"
#include "mvm.h"
#include "fw-api.h"
#include "fw-dbg.h"
/*
* iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
*
* Copies the phy information in mvm->last_phy_info, it will be used when the
* actual data will come from the fw in the next packet.
*/
void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
mvm->ampdu_ref++;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
spin_lock(&mvm->drv_stats_lock);
mvm->drv_rx_stats.ampdu_count++;
spin_unlock(&mvm->drv_stats_lock);
}
#endif
}
/*
* iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
*
* Adds the rxb to a new skb and give it to mac80211
*/
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
struct napi_struct *napi,
struct sk_buff *skb,
struct ieee80211_hdr *hdr, u16 len,
u8 crypt_len,
struct iwl_rx_cmd_buffer *rxb)
{
unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
unsigned int fraglen;
/*
* The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
* but those are all multiples of 4 long) all goes away, but we
* want the *end* of it, which is going to be the start of the IP
* header, to be aligned when it gets pulled in.
* The beginning of the skb->data is aligned on at least a 4-byte
* boundary after allocation. Everything here is aligned at least
* on a 2-byte boundary so we can just take hdrlen & 3 and pad by
* the result.
*/
skb_reserve(skb, hdrlen & 3);
/* If frame is small enough to fit in skb->head, pull it completely.
* If not, only pull ieee80211_hdr (including crypto if present, and
* an additional 8 bytes for SNAP/ethertype, see below) so that
* splice() or TCP coalesce are more efficient.
*
* Since, in addition, ieee80211_data_to_8023() always pull in at
* least 8 bytes (possibly more for mesh) we can do the same here
* to save the cost of doing it later. That still doesn't pull in
* the actual IP header since the typical case has a SNAP header.
* If the latter changes (there are efforts in the standards group
* to do so) we should revisit this and ieee80211_data_to_8023().
*/
hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
fraglen = len - hdrlen;
if (fraglen) {
int offset = (void *)hdr + hdrlen -
rxb_addr(rxb) + rxb_offset(rxb);
skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
fraglen, rxb->truesize);
}
ieee80211_rx_napi(mvm->hw, sta, skb, napi);
}
/*
* iwl_mvm_get_signal_strength - use new rx PHY INFO API
* values are reported by the fw as positive values - need to negate
* to obtain their dBM. Account for missing antennas by replacing 0
* values by -256dBm: practically 0 power and a non-feasible 8 bit value.
*/
static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
struct iwl_rx_phy_info *phy_info,
struct ieee80211_rx_status *rx_status)
{
int energy_a, energy_b, energy_c, max_energy;
u32 val;
val =
le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
IWL_RX_INFO_ENERGY_ANT_A_POS;
energy_a = energy_a ? -energy_a : S8_MIN;
energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
IWL_RX_INFO_ENERGY_ANT_B_POS;
energy_b = energy_b ? -energy_b : S8_MIN;
energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
IWL_RX_INFO_ENERGY_ANT_C_POS;
energy_c = energy_c ? -energy_c : S8_MIN;
max_energy = max(energy_a, energy_b);
max_energy = max(max_energy, energy_c);
IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
energy_a, energy_b, energy_c, max_energy);
rx_status->signal = max_energy;
rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
RX_RES_PHY_FLAGS_ANTENNA)
>> RX_RES_PHY_FLAGS_ANTENNA_POS;
rx_status->chain_signal[0] = energy_a;
rx_status->chain_signal[1] = energy_b;
rx_status->chain_signal[2] = energy_c;
}
/*
* iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
* @mvm: the mvm object
* @hdr: 80211 header
* @stats: status in mac80211's format
* @rx_pkt_status: status coming from fw
*
* returns non 0 value if the packet should be dropped
*/
static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
struct ieee80211_hdr *hdr,
struct ieee80211_rx_status *stats,
u32 rx_pkt_status,
u8 *crypt_len)
{
if (!ieee80211_has_protected(hdr->frame_control) ||
(rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
RX_MPDU_RES_STATUS_SEC_NO_ENC)
return 0;
/* packet was encrypted with unknown alg */
if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
RX_MPDU_RES_STATUS_SEC_ENC_ERR)
return 0;
switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
/* alg is CCM: check MIC only */
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
*crypt_len = IEEE80211_CCMP_HDR_LEN;
return 0;
case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
/* Don't drop the frame and decrypt it in SW */
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
return 0;
*crypt_len = IEEE80211_TKIP_IV_LEN;
/* fall through if TTAK OK */
case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
RX_MPDU_RES_STATUS_SEC_WEP_ENC)
*crypt_len = IEEE80211_WEP_IV_LEN;
return 0;
case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
return -1;
stats->flag |= RX_FLAG_DECRYPTED;
return 0;
default:
IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
}
return 0;
}
static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
struct sk_buff *skb,
u32 status)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
if (mvmvif->features & NETIF_F_RXCSUM &&
status & RX_MPDU_RES_STATUS_CSUM_DONE &&
status & RX_MPDU_RES_STATUS_CSUM_OK)
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*/
void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb)
{
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status *rx_status;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
struct ieee80211_sta *sta = NULL;
struct sk_buff *skb;
u32 len;
u32 rate_n_flags;
u32 rx_pkt_status;
u8 crypt_len = 0;
bool take_ref;
phy_info = &mvm->last_phy_info;
rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
len = le16_to_cpu(rx_res->byte_count);
rx_pkt_status = get_unaligned_le32((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
/* Dont use dev_alloc_skb(), we'll have enough headroom once
* ieee80211_hdr pulled.
*/
skb = alloc_skb(128, GFP_ATOMIC);
if (!skb) {
IWL_ERR(mvm, "alloc_skb failed\n");
return;
}
rx_status = IEEE80211_SKB_RXCB(skb);
/*
* drop the packet if it has failed being decrypted by HW
*/
if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
&crypt_len)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
kfree_skb(skb);
return;
}
/*
* Keep packets with CRC errors (and with overrun) for monitor mode
* (otherwise the firmware discards them) but mark them as bad.
*/
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status->mactime = le64_to_cpu(phy_info->timestamp);
rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
rx_status->band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
rx_status->freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
rx_status->band);
/* TSF as indicated by the firmware is at INA time */
rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
(unsigned long long)rx_status->mactime);
rcu_read_lock();
if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
if (IS_ERR(sta))
sta = NULL;
}
} else if (!is_multicast_ether_addr(hdr->addr2)) {
/* This is fine since we prevent two stations with the same
* address from being added.
*/
sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
}
if (sta) {
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct ieee80211_vif *tx_blocked_vif =
rcu_dereference(mvm->csa_tx_blocked_vif);
/* We have tx blocked stations (with CS bit). If we heard
* frames from a blocked station on a new channel we can
* TX to it again.
*/
if (unlikely(tx_blocked_vif) &&
mvmsta->vif == tx_blocked_vif) {
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(tx_blocked_vif);
if (mvmvif->csa_target_freq == rx_status->freq)
iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
false);
}
rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
ieee80211_is_beacon(hdr->frame_control)) {
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
bool trig_check;
s32 rssi;
trig = iwl_fw_dbg_get_trigger(mvm->fw,
FW_DBG_TRIGGER_RSSI);
rssi_trig = (void *)trig->data;
rssi = le32_to_cpu(rssi_trig->rssi);
trig_check =
iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
trig);
if (trig_check && rx_status->signal < rssi)
iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
}
if (ieee80211_is_data(hdr->frame_control))
iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
}
rcu_read_unlock();
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
rx_status->flag |= RX_FLAG_SHORTPRE;
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
/*
* We know which subframes of an A-MPDU belong
* together since we get a single PHY response
* from the firmware for all of them
*/
rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
rx_status->ampdu_reference = mvm->ampdu_ref;
}
/* Set up the HT phy flags */
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status->flag |= RX_FLAG_40MHZ;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status->flag |= RX_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
rx_status->flag |= RX_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_LDPC_MSK)
rx_status->flag |= RX_FLAG_LDPC;
if (rate_n_flags & RATE_MCS_HT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->flag |= RX_FLAG_HT;
rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->vht_nss =
((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
RATE_VHT_MCS_NSS_POS) + 1;
rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
rx_status->flag |= RX_FLAG_VHT;
rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
if (rate_n_flags & RATE_MCS_BF_MSK)
rx_status->vht_flag |= RX_VHT_FLAG_BF;
} else {
rx_status->rate_idx =
iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
rx_status->band);
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_update_frame_stats(mvm, rate_n_flags,
rx_status->flag & RX_FLAG_AMPDU_DETAILS);
#endif
if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)) &&
mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)))
rx_status->boottime_ns = ktime_get_boot_ns();
/* Take a reference briefly to kick off a d0i3 entry delay so
* we can handle bursts of RX packets without toggling the
* state too often. But don't do this for beacons if we are
* going to idle because the beacon filtering changes we make
* cause the firmware to send us collateral beacons. */
take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) &&
ieee80211_is_beacon(hdr->frame_control));
if (take_ref)
iwl_mvm_ref(mvm, IWL_MVM_REF_RX);
iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
crypt_len, rxb);
if (take_ref)
iwl_mvm_unref(mvm, IWL_MVM_REF_RX);
}
static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
struct mvm_statistics_rx *rx_stats)
{
lockdep_assert_held(&mvm->mutex);
mvm->rx_stats = *rx_stats;
}
struct iwl_mvm_stat_data {
struct iwl_mvm *mvm;
__le32 mac_id;
u8 beacon_filter_average_energy;
struct mvm_statistics_general_v8 *general;
struct mvm_statistics_load *load;
};
static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_stat_data *data = _data;
struct iwl_mvm *mvm = data->mvm;
int sig = -data->beacon_filter_average_energy;
int last_event;
int thold = vif->bss_conf.cqm_rssi_thold;
int hyst = vif->bss_conf.cqm_rssi_hyst;
u16 id = le32_to_cpu(data->mac_id);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
/* This doesn't need the MAC ID check since it's not taking the
* data copied into the "data" struct, but rather the data from
* the notification directly.
*/
if (data->general) {
mvmvif->beacon_stats.num_beacons =
le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
mvmvif->beacon_stats.avg_signal =
-data->general->beacon_average_energy[mvmvif->id];
}
if (mvmvif->id != id)
return;
if (vif->type != NL80211_IFTYPE_STATION)
return;
if (sig == 0) {
IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
return;
}
mvmvif->bf_data.ave_beacon_signal = sig;
/* BT Coex */
if (mvmvif->bf_data.bt_coex_min_thold !=
mvmvif->bf_data.bt_coex_max_thold) {
last_event = mvmvif->bf_data.last_bt_coex_event;
if (sig > mvmvif->bf_data.bt_coex_max_thold &&
(last_event <= mvmvif->bf_data.bt_coex_min_thold ||
last_event == 0)) {
mvmvif->bf_data.last_bt_coex_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
sig);
iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
} else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
(last_event >= mvmvif->bf_data.bt_coex_max_thold ||
last_event == 0)) {
mvmvif->bf_data.last_bt_coex_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
sig);
iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
}
}
if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
return;
/* CQM Notification */
last_event = mvmvif->bf_data.last_cqm_event;
if (thold && sig < thold && (last_event == 0 ||
sig < last_event - hyst)) {
mvmvif->bf_data.last_cqm_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
sig);
ieee80211_cqm_rssi_notify(
vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
GFP_KERNEL);
} else if (sig > thold &&
(last_event == 0 || sig > last_event + hyst)) {
mvmvif->bf_data.last_cqm_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
sig);
ieee80211_cqm_rssi_notify(
vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
GFP_KERNEL);
}
}
static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
{
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_stats *trig_stats;
u32 trig_offset, trig_thold;
if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
return;
trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
trig_stats = (void *)trig->data;
if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
return;
trig_offset = le32_to_cpu(trig_stats->stop_offset);
trig_thold = le32_to_cpu(trig_stats->stop_threshold);
if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
return;
if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
return;
iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
}
void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
struct iwl_rx_packet *pkt)
{
struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
struct iwl_mvm_stat_data data = {
.mvm = mvm,
};
int expected_size = iwl_mvm_has_new_rx_api(mvm) ? sizeof(*stats) :
sizeof(struct iwl_notif_statistics_v10);
u32 temperature;
if (iwl_rx_packet_payload_len(pkt) != expected_size)
goto invalid;
temperature = le32_to_cpu(stats->general.radio_temperature);
data.mac_id = stats->rx.general.mac_id;
data.beacon_filter_average_energy =
stats->general.beacon_filter_average_energy;
iwl_mvm_update_rx_statistics(mvm, &stats->rx);
mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
mvm->radio_stats.on_time_rf =
le64_to_cpu(stats->general.on_time_rf);
mvm->radio_stats.on_time_scan =
le64_to_cpu(stats->general.on_time_scan);
data.general = &stats->general;
if (iwl_mvm_has_new_rx_api(mvm)) {
int i;
data.load = &stats->load_stats;
rcu_read_lock();
for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
struct iwl_mvm_sta *sta;
if (!data.load->avg_energy[i])
continue;
sta = iwl_mvm_sta_from_staid_rcu(mvm, i);
if (!sta)
continue;
sta->avg_energy = data.load->avg_energy[i];
}
rcu_read_unlock();
}
iwl_mvm_rx_stats_check_trigger(mvm, pkt);
ieee80211_iterate_active_interfaces(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_stat_iterator,
&data);
return;
invalid:
IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
iwl_rx_packet_payload_len(pkt));
}
void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
}
void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
int i;
u32 pkt_len = iwl_rx_packet_payload_len(pkt);
if (WARN_ONCE(pkt_len != sizeof(*notif),
"Received window status notification of wrong size (%u)\n",
pkt_len))
return;
rcu_read_lock();
for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
struct ieee80211_sta *sta;
u8 sta_id, tid;
u64 bitmap;
u32 ssn;
u16 ratid;
u16 received_mpdu;
ratid = le16_to_cpu(notif->ra_tid[i]);
/* check that this TID is valid */
if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
continue;
received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
if (received_mpdu == 0)
continue;
tid = ratid & BA_WINDOW_STATUS_TID_MSK;
/* get the station */
sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
>> BA_WINDOW_STATUS_STA_ID_POS;
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (IS_ERR_OR_NULL(sta))
continue;
bitmap = le64_to_cpu(notif->bitmap[i]);
ssn = le32_to_cpu(notif->start_seq_num[i]);
/* update mac80211 with the bitmap for the reordering buffer */
ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
received_mpdu);
}
rcu_read_unlock();
}
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