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fuchsia / drivers / wlan / intel / iwlwifi / e14bff8f02c9b2bd8c5514affe995ee678cf1c24 / . / third_party / iwlwifi / mvm / rx.c
blob: 4ebe0e0ff1b386b8226574acfc14c78e56e159c1 [file] [log] [blame]
/******************************************************************************
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 Intel Corporation
* 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 <zircon/status.h>
#include "third_party/iwlwifi/iwl-trans.h"
#include "third_party/iwlwifi/mvm/fw-api.h"
#include "third_party/iwlwifi/mvm/mvm.h"
#include "third_party/iwlwifi/platform/ieee80211_include.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 CPTCFG_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_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.
*
* Args:
* mvm: the MVM instance
* phy_info: the PHY info received in the last packet.
* rx_info: output. RSSI will be set in this structure.
*/
static void iwl_mvm_get_signal_strength(const struct iwl_mvm* mvm,
const struct iwl_rx_phy_info* phy_info,
wlan_rx_info_t* rx_info) {
int energy_a, energy_b, energy_c, max_energy;
uint32_t 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_info->valid_fields |= WLAN_RX_INFO_VALID_RSSI;
rx_info->rssi_dbm = max_energy;
}
/*
* 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 zx_status_t iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm* mvm,
struct ieee80211_frame_header* hdr,
uint32_t rx_pkt_status, size_t* crypt_len) {
if (!ieee80211_pkt_is_protected(hdr) ||
(rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == RX_MPDU_RES_STATUS_SEC_NO_ENC) {
return ZX_OK;
}
/* 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 ZX_ERR_NOT_SUPPORTED;
}
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 ZX_ERR_IO;
}
*crypt_len = IEEE80211_CCMP_HDR_LEN;
return ZX_OK;
default:
/* Expected in monitor (not having the keys) */
if (!mvm->monitor_on) {
IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
}
}
return ZX_OK;
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_rx_handle_tcm(struct iwl_mvm* mvm, struct ieee80211_sta* sta,
struct ieee80211_hdr* hdr, uint32_t len,
struct iwl_rx_phy_info* phy_info, uint32_t rate_n_flags) {
struct iwl_mvm_sta* mvmsta;
struct iwl_mvm_tcm_mac* mdata;
struct iwl_mvm_vif* mvmvif;
int mac;
int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
/* expected throughput in 100Kbps, single stream, 20 MHz */
static const uint8_t thresh_tpt[] = {
9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
};
uint16_t thr;
if (ieee80211_is_data_qos(hdr->frame_control)) {
ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)];
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) {
schedule_delayed_work(&mvm->tcm.work, 0);
}
mdata = &mvm->tcm.data[mac];
mdata->rx.pkts[ac]++;
/* count the airtime only once for each ampdu */
if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
}
mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) {
return;
}
if (mdata->opened_rx_ba_sessions || mdata->uapsd_nonagg_detect.detected ||
(!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
!mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
!mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
!mvmvif->queue_params[IEEE80211_AC_BK].uapsd) ||
mvmsta->sta_id != mvmvif->ap_sta_id) {
return;
}
if (rate_n_flags & RATE_MCS_HT_MSK) {
thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK];
thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS);
} else {
if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= ARRAY_SIZE(thresh_tpt))) {
return;
}
thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> RATE_VHT_MCS_NSS_POS);
}
thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> RATE_MCS_CHAN_WIDTH_POS);
mdata->uapsd_nonagg_detect.rx_bytes += len;
ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
}
static void iwl_mvm_rx_csum(struct ieee80211_sta* sta, struct sk_buff* skb, uint32_t 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;
}
}
#endif // NEEDS_PORTING
/*
* iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
*
* Handles the actual data of the Rx packet from the fw
*
* Below is the packet layout from the firmware.
*
* rx_res,
* pkt &pkt->data[] frame
* | | |
* v v v
* 0 4 8 10 12 12 + res_len
* +--------+--------+-------+--------+--------------------+---------------+
* | | | *rx_res | | |
* | len_n_ | cmd_ |----------------| MAC header .... | rx_pkt_status |
* | flags | header | byte_ | assist | | |
* | | | count | | | |
* +--------+--------+-------+--------+--------------------+---------------+
* <---- res_len ---->
*
* - 'assist' contains the TCP offload info from FW. See 'enum iwl_csum_rx_assist_info'.
* - 'rx_pkt_status' contains the flags parsed by FW (e.g. CRC_OK). See 'enum iwl_mvm_rx_status'.
*
* TODO(43218): replace 'napi' with something else to map to mvmvif.
*/
void iwl_mvm_rx_rx_mpdu(struct iwl_mvm* mvm, struct napi_struct* napi,
struct iwl_rx_cmd_buffer* rxb) {
zx_status_t status = ZX_OK;
// The PHY info was received in the last MVM packet.
struct iwl_rx_phy_info* phy_info = &mvm->last_phy_info;
uint16_t phy_flags = le16_to_cpu(phy_info->phy_flags);
// Now, parse this packet.
struct iwl_rx_packet* pkt = rxb_addr(rxb);
struct iwl_rx_mpdu_res_start* rx_res = (struct iwl_rx_mpdu_res_start*)pkt->data;
struct ieee80211_frame_header* frame = (void*)(pkt->data + sizeof(*rx_res));
size_t res_len = le16_to_cpu(rx_res->byte_count);
uint32_t rx_pkt_status = le32_to_cpup((__le32*)(pkt->data + sizeof(*rx_res) + res_len));
size_t crypt_len = 0;
// Prepare the meta info sent to MLME.
wlan_rx_info_t rx_info = {};
/*
* drop the packet if it has failed being decrypted by HW
*/
if (((status = iwl_mvm_set_mac80211_rx_flag(mvm, frame, rx_pkt_status, &crypt_len))) != ZX_OK) {
IWL_DEBUG_DROP(mvm, "Bad decryption results : %s\n", zx_status_get_string(status));
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_info.rx_flags |= WLAN_RX_INFO_FLAGS_FCS_INVALID;
}
wlan_info_band_t band =
phy_flags & RX_RES_PHY_FLAGS_BAND_24 ? WLAN_INFO_BAND_TWO_GHZ : WLAN_INFO_BAND_FIVE_GHZ;
rx_info.channel.primary = le16_to_cpu(phy_info->channel);
#if 0 // NEEDS_PORTING
/* TSF as indicated by the firmware is at INA time */
rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
#endif // NEEDS_PORTING
iwl_mvm_get_signal_strength(mvm, phy_info, &rx_info);
#if 0 // NEEDS_PORTING
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) {
uint32_t id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
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);
struct iwl_fw_dbg_trigger_tlv* trig;
struct ieee80211_vif* vif = mvmsta->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) && 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, rx_status);
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif), FW_DBG_TRIGGER_RSSI);
if (trig && ieee80211_is_beacon(hdr->frame_control)) {
struct iwl_fw_dbg_trigger_low_rssi* rssi_trig;
int32_t rssi;
rssi_trig = (void*)trig->data;
rssi = le32_to_cpu(rssi_trig->rssi);
if (rx_status->signal < rssi) {
iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
}
}
if (!mvm->tcm.paused && len >= sizeof(*hdr) && !is_multicast_ether_addr(hdr->addr1) &&
ieee80211_is_data(hdr->frame_control)) {
iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, rate_n_flags);
}
#ifdef CPTCFG_IWLMVM_TDLS_PEER_CACHE
/*
* these packets are from the AP or the existing TDLS peer.
* In both cases an existing station.
*/
iwl_mvm_tdls_peer_cache_pkt(mvm, hdr, len, 0);
#endif /* CPTCFG_IWLMVM_TDLS_PEER_CACHE */
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->enc_flags |= RX_ENC_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;
}
#endif // NEEDS_PORTING
// Parse rx_info fields from phy_info->rate_n_flags.
//
// See rate_n_flags bit fields definition in fw/api/rs.h.
uint32_t rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
rx_info.channel.cbw = CHANNEL_BANDWIDTH_CBW20;
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_info.channel.cbw = CHANNEL_BANDWIDTH_CBW40;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_info.channel.cbw = CHANNEL_BANDWIDTH_CBW80;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_info.channel.cbw = CHANNEL_BANDWIDTH_CBW160;
break;
}
#if 0 // NEEDS_PORTING
if (!(rate_n_flags & RATE_MCS_CCK_MSK) && rate_n_flags & RATE_MCS_SGI_MSK) {
rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
}
if (rate_n_flags & RATE_HT_MCS_GF_MSK) {
rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
}
if (rate_n_flags & RATE_MCS_LDPC_MSK) {
rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
}
#endif // NEEDS_PORTING
// See rate_n_flags bit fields definition in fw/api/rs.h.
if (rate_n_flags & RATE_MCS_HT_MSK) {
rx_info.phy = WLAN_INFO_PHY_TYPE_HT;
#if 0 // NEEDS_PORTING
// TODO(36683): Supports HT (802.11n)
u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
RATE_MCS_STBC_POS;
rx_status->encoding = RX_ENC_HT;
rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
#endif // NEEDS_PORTING
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
rx_info.phy = WLAN_INFO_PHY_TYPE_VHT;
#if 0 // NEEDS_PORTING
// TODO(36684): Supports VHT (802.11ac)
uint8_t stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> RATE_MCS_STBC_POS;
rx_status->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->encoding = RX_ENC_VHT;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
if (rate_n_flags & RATE_MCS_BF_MSK) {
rx_status->enc_flags |= RX_ENC_FLAG_BF;
}
#endif // NEEDS_PORTING
} else {
rx_info.phy =
phy_flags & RX_RES_PHY_FLAGS_MOD_CCK ? WLAN_INFO_PHY_TYPE_HR : WLAN_INFO_PHY_TYPE_OFDM;
int mac80211_idx;
zx_status_t status = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, band, &mac80211_idx);
if (status != ZX_OK) {
IWL_ERR(mvm, "Cannot convert rate_n_flags (0x%08x, band=%d) to mac80211 index. status=%s\n",
rate_n_flags, band, zx_status_get_string(status));
return;
}
status = mac80211_idx_to_data_rate(band, mac80211_idx, &rx_info.data_rate);
if (status != ZX_OK) {
IWL_ERR(mvm, "Cannot convert mac80211 index (%d) to data rate for MLME (band=%d)\n",
mac80211_idx, band);
return;
}
}
rx_info.valid_fields |= WLAN_RX_INFO_VALID_DATA_RATE;
#if 0 // NEEDS_PORTING
#ifdef CPTCFG_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);
}
#endif // NEEDS_PORTING
// Send to MLME
// TODO(43218): replace rxq->napi with interface instance so that we can map to mvmvif.
wlan_rx_packet_t rx_packet = {
.mac_frame_buffer = (uint8_t*)frame,
.mac_frame_size = res_len,
.info = rx_info,
};
wlan_softmac_ifc_recv(&mvm->mvmvif[0]->ifc, &rx_packet);
#if 0 // NEEDS_PORTING
if (take_ref) {
iwl_mvm_unref(mvm, IWL_MVM_REF_RX);
}
#endif // NEEDS_PORTING
}
#if 0 // NEEDS_PORTING
struct iwl_mvm_stat_data {
struct iwl_mvm* mvm;
__le32 mac_id;
uint8_t beacon_filter_average_energy;
void* general;
};
static void iwl_mvm_stat_iterator(void* _data, uint8_t* 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;
uint16_t id = le32_to_cpu(data->mac_id);
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(vif);
uint16_t vif_id = mvmvif->id;
/* 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 (iwl_mvm_has_new_rx_stats_api(mvm)) {
struct mvm_statistics_general* general = data->general;
mvmvif->beacon_stats.num_beacons = le32_to_cpu(general->beacon_counter[vif_id]);
mvmvif->beacon_stats.avg_signal = -general->beacon_average_energy[vif_id];
} else {
struct mvm_statistics_general_v8* general = data->general;
mvmvif->beacon_stats.num_beacons = le32_to_cpu(general->beacon_counter[vif_id]);
mvmvif->beacon_stats.avg_signal = -general->beacon_average_energy[vif_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, sig, 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, sig, 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;
uint32_t trig_offset, trig_thold;
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
if (!trig) {
return;
}
trig_stats = (void*)trig->data;
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_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
}
void iwl_mvm_handle_rx_statistics(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
struct iwl_mvm_stat_data data = {
.mvm = mvm,
};
int expected_size;
int i;
uint8_t* energy;
__le32 *bytes, *air_time;
__le32 flags;
if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
if (iwl_mvm_has_new_rx_api(mvm)) {
expected_size = sizeof(struct iwl_notif_statistics_v11);
} else {
expected_size = sizeof(struct iwl_notif_statistics_v10);
}
} else {
expected_size = sizeof(struct iwl_notif_statistics);
}
if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
"received invalid statistics size (%d)!\n", iwl_rx_packet_payload_len(pkt))) {
return;
}
if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
struct iwl_notif_statistics_v11* stats = (void*)&pkt->data;
data.mac_id = stats->rx.general.mac_id;
data.beacon_filter_average_energy = stats->general.common.beacon_filter_average_energy;
mvm->rx_stats_v3 = stats->rx;
mvm->radio_stats.rx_time = le64_to_cpu(stats->general.common.rx_time);
mvm->radio_stats.tx_time = le64_to_cpu(stats->general.common.tx_time);
mvm->radio_stats.on_time_rf = le64_to_cpu(stats->general.common.on_time_rf);
mvm->radio_stats.on_time_scan = le64_to_cpu(stats->general.common.on_time_scan);
data.general = &stats->general;
flags = stats->flag;
} else {
struct iwl_notif_statistics* stats = (void*)&pkt->data;
data.mac_id = stats->rx.general.mac_id;
data.beacon_filter_average_energy = stats->general.common.beacon_filter_average_energy;
mvm->rx_stats = stats->rx;
mvm->radio_stats.rx_time = le64_to_cpu(stats->general.common.rx_time);
mvm->radio_stats.tx_time = le64_to_cpu(stats->general.common.tx_time);
mvm->radio_stats.on_time_rf = le64_to_cpu(stats->general.common.on_time_rf);
mvm->radio_stats.on_time_scan = le64_to_cpu(stats->general.common.on_time_scan);
data.general = &stats->general;
flags = stats->flag;
}
iwl_mvm_rx_stats_check_trigger(mvm, pkt);
ieee80211_iterate_active_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_stat_iterator,
&data);
if (!iwl_mvm_has_new_rx_api(mvm)) {
return;
}
if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
struct iwl_notif_statistics_v11* v11 = (void*)&pkt->data;
energy = (void*)&v11->load_stats.avg_energy;
bytes = (void*)&v11->load_stats.byte_count;
air_time = (void*)&v11->load_stats.air_time;
} else {
struct iwl_notif_statistics* stats = (void*)&pkt->data;
energy = (void*)&stats->load_stats.avg_energy;
bytes = (void*)&stats->load_stats.byte_count;
air_time = (void*)&stats->load_stats.air_time;
}
rcu_read_lock();
for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
struct iwl_mvm_sta* sta;
if (!energy[i]) {
continue;
}
sta = iwl_mvm_sta_from_staid_rcu(mvm, i);
if (!sta) {
continue;
}
sta->avg_energy = energy[i];
}
rcu_read_unlock();
/*
* Don't update in case the statistics are not cleared, since
* we will end up counting twice the same airtime, once in TCM
* request and once in statistics notification.
*/
if (!(le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)) {
return;
}
spin_lock(&mvm->tcm.lock);
for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
struct iwl_mvm_tcm_mac* mdata = &mvm->tcm.data[i];
uint32_t rx_bytes = le32_to_cpu(bytes[i]);
uint32_t airtime = le32_to_cpu(air_time[i]);
mdata->rx.airtime += airtime;
mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
if (airtime) {
/* re-init every time to store rate from FW */
ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, rx_bytes * 8 / airtime);
}
}
spin_unlock(&mvm->tcm.lock);
}
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;
uint32_t 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;
uint8_t sta_id, tid;
uint64_t bitmap;
uint32_t ssn;
uint16_t ratid;
uint16_t 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();
}
#endif // NEEDS_PORTING