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linux/linux-5.18.11/drivers/net/wireless/intel/iwlwifi/mvm/rx.c

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2024-03-22 18:12:32 +00:00
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2012-2014, 2018-2021 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
#include <asm/unaligned.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "iwl-trans.h"
#include "mvm.h"
#include "fw-api.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);
unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
if (unlikely(pkt_len < sizeof(mvm->last_phy_info)))
return;
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;
skb_put_data(skb, hdr, hdrlen);
fraglen = len - hdrlen;
if (fraglen) {
int offset = (u8 *)hdr + hdrlen -
(u8 *)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, 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;
max_energy = max(energy_a, energy_b);
IWL_DEBUG_STATS(mvm, "energy In A %d B %d , and max %d\n",
energy_a, energy_b, 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;
}
/*
* 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 (!fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
return 0;
*crypt_len = IEEE80211_TKIP_IV_LEN;
fallthrough;
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:
/* Expected in monitor (not having the keys) */
if (!mvm->monitor_on)
IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
}
return 0;
}
static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
struct ieee80211_sta *sta,
struct ieee80211_hdr *hdr, u32 len,
struct iwl_rx_phy_info *phy_info,
u32 rate_n_flags)
{
struct iwl_mvm_sta *mvmsta;
struct iwl_mvm_tcm_mac *mdata;
int mac;
int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
struct iwl_mvm_vif *mvmvif;
/* expected throughput in 100Kbps, single stream, 20 MHz */
static const u8 thresh_tpt[] = {
9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
};
u16 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);
}
if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
return;
mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
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_V1) {
thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
RATE_HT_MCS_NSS_POS_V1);
} 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_V1) >>
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,
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, pkt_len = iwl_rx_packet_payload_len(pkt);
u32 rate_n_flags;
u32 rx_pkt_status;
u8 crypt_len = 0;
if (unlikely(pkt_len < sizeof(*rx_res))) {
IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
return;
}
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);
if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
return;
}
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 >= mvm->fw->ucode_capa.num_stations)) {
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;
s32 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);
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;
}
/* Set up the HT phy flags */
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
rx_status->bw = RATE_INFO_BW_40;
break;
case RATE_MCS_CHAN_WIDTH_80:
rx_status->bw = RATE_INFO_BW_80;
break;
case RATE_MCS_CHAN_WIDTH_160:
rx_status->bw = RATE_INFO_BW_160;
break;
}
if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
rate_n_flags & RATE_MCS_SGI_MSK_V1)
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_V1)
rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
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_V1;
rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
u8 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;
} else {
int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
rx_status->band);
if (WARN(rate < 0 || rate > 0xFF,
"Invalid rate flags 0x%x, band %d,\n",
rate_n_flags, rx_status->band)) {
kfree_skb(skb);
return;
}
rx_status->rate_idx = rate;
}
#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_boottime_ns();
iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
crypt_len, rxb);
}
struct iwl_mvm_stat_data {
struct iwl_mvm *mvm;
__le32 flags;
__le32 mac_id;
u8 beacon_filter_average_energy;
__le32 *beacon_counter;
u8 *beacon_average_energy;
};
struct iwl_mvm_stat_data_all_macs {
struct iwl_mvm *mvm;
__le32 flags;
struct iwl_statistics_ntfy_per_mac *per_mac_stats;
};
static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
int thold = vif->bss_conf.cqm_rssi_thold;
int hyst = vif->bss_conf.cqm_rssi_hyst;
int last_event;
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 void iwl_mvm_stat_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_stat_data *data = _data;
int sig = -data->beacon_filter_average_energy;
u16 id = le32_to_cpu(data->mac_id);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u16 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.
*/
mvmvif->beacon_stats.num_beacons =
le32_to_cpu(data->beacon_counter[vif_id]);
mvmvif->beacon_stats.avg_signal =
-data->beacon_average_energy[vif_id];
if (mvmvif->id != id)
return;
if (vif->type != NL80211_IFTYPE_STATION)
return;
/* make sure that beacon statistics don't go backwards with TCM
* request to clear statistics
*/
if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
mvmvif->beacon_stats.accu_num_beacons +=
mvmvif->beacon_stats.num_beacons;
iwl_mvm_update_vif_sig(vif, sig);
}
static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_stat_data_all_macs *data = _data;
struct iwl_statistics_ntfy_per_mac *mac_stats;
int sig;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u16 vif_id = mvmvif->id;
if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
return;
if (vif->type != NL80211_IFTYPE_STATION)
return;
mac_stats = &data->per_mac_stats[vif_id];
mvmvif->beacon_stats.num_beacons =
le32_to_cpu(mac_stats->beacon_counter);
mvmvif->beacon_stats.avg_signal =
-le32_to_cpu(mac_stats->beacon_average_energy);
/* make sure that beacon statistics don't go backwards with TCM
* request to clear statistics
*/
if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
mvmvif->beacon_stats.accu_num_beacons +=
mvmvif->beacon_stats.num_beacons;
sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
iwl_mvm_update_vif_sig(vif, sig);
}
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;
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);
}
static void iwl_mvm_stats_energy_iter(void *_data,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
u8 *energy = _data;
u32 sta_id = mvmsta->sta_id;
if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
sta_id, IWL_MVM_STATION_COUNT_MAX))
return;
if (energy[sta_id])
mvmsta->avg_energy = energy[sta_id];
}
static void
iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
__le32 *rx_bytes_le)
{
int i;
spin_lock(&mvm->tcm.lock);
for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
u32 airtime = le32_to_cpu(air_time_le[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);
}
static void
iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
struct iwl_statistics_operational_ntfy *stats)
{
struct iwl_mvm_stat_data_all_macs data = {
.mvm = mvm,
.flags = stats->flags,
.per_mac_stats = stats->per_mac_stats,
};
ieee80211_iterate_active_interfaces(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_stat_iterator_all_macs,
&data);
}
static void
iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
struct iwl_statistics_operational_ntfy_ver_14 *stats)
{
struct iwl_mvm_stat_data data = {
.mvm = mvm,
};
u8 beacon_average_energy[MAC_INDEX_AUX];
__le32 flags;
int i;
flags = stats->flags;
data.mac_id = stats->mac_id;
data.beacon_filter_average_energy =
le32_to_cpu(stats->beacon_filter_average_energy);
data.flags = flags;
data.beacon_counter = stats->beacon_counter;
for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
beacon_average_energy[i] =
le32_to_cpu(stats->beacon_average_energy[i]);
data.beacon_average_energy = beacon_average_energy;
ieee80211_iterate_active_interfaces(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_stat_iterator,
&data);
}
static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
struct iwl_rx_packet *pkt,
u32 expected_size)
{
struct iwl_statistics_ntfy_hdr *hdr;
if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
"received invalid statistics size (%d)!, expected_size: %d\n",
iwl_rx_packet_payload_len(pkt), expected_size))
return false;
hdr = (void *)&pkt->data;
if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
hdr->version !=
iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
"received unsupported hdr type %d, version %d\n",
hdr->type, hdr->version))
return false;
if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
"received invalid statistics size in header (%d)!, expected_size: %d\n",
le16_to_cpu(hdr->size), expected_size))
return false;
return true;
}
static void
iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
struct iwl_rx_packet *pkt)
{
u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
__le32 air_time[MAC_INDEX_AUX];
__le32 rx_bytes[MAC_INDEX_AUX];
__le32 flags = 0;
int i;
u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
STATISTICS_NOTIFICATION, 0);
if (WARN_ONCE(notif_ver > 15,
"invalid statistics version id: %d\n", notif_ver))
return;
if (notif_ver == 14) {
struct iwl_statistics_operational_ntfy_ver_14 *stats =
(void *)pkt->data;
if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
return;
iwl_mvm_stats_ver_14(mvm, stats);
flags = stats->flags;
mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
mvm->radio_stats.on_time_scan =
le64_to_cpu(stats->on_time_scan);
for (i = 0; i < ARRAY_SIZE(average_energy); i++)
average_energy[i] = le32_to_cpu(stats->average_energy[i]);
for (i = 0; i < ARRAY_SIZE(air_time); i++) {
air_time[i] = stats->air_time[i];
rx_bytes[i] = stats->rx_bytes[i];
}
}
if (notif_ver == 15) {
struct iwl_statistics_operational_ntfy *stats =
(void *)pkt->data;
if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
return;
iwl_mvm_stats_ver_15(mvm, stats);
flags = stats->flags;
mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
mvm->radio_stats.on_time_scan =
le64_to_cpu(stats->on_time_scan);
for (i = 0; i < ARRAY_SIZE(average_energy); i++)
average_energy[i] =
le32_to_cpu(stats->per_sta_stats[i].average_energy);
for (i = 0; i < ARRAY_SIZE(air_time); i++) {
air_time[i] = stats->per_mac_stats[i].air_time;
rx_bytes[i] = stats->per_mac_stats[i].rx_bytes;
}
}
iwl_mvm_rx_stats_check_trigger(mvm, pkt);
ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
average_energy);
/*
* 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)
iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
}
void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
struct iwl_rx_packet *pkt)
{
struct iwl_mvm_stat_data data = {
.mvm = mvm,
};
__le32 *bytes, *air_time, flags;
int expected_size;
u8 *energy;
/* From ver 14 and up we use TLV statistics format */
if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
STATISTICS_NOTIFICATION, 0) >= 14)
return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
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.beacon_counter = stats->general.beacon_counter;
data.beacon_average_energy =
stats->general.beacon_average_energy;
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.beacon_counter = stats->general.beacon_counter;
data.beacon_average_energy =
stats->general.beacon_average_energy;
flags = stats->flag;
}
data.flags = flags;
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;
}
ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
energy);
/*
* 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)
iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
}
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;
BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
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();
}