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LinuxKPI: 802.11 Refine/add DTIM/TSF handling

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Correct data types related to delivery traffic indication map (DTIM)/
timing synchronization function (TSF) and implement/refine their
handling.  This information is used/needed by iwlwifi to set a station
as associated.  This will hopefully avoid more "no beacon heard"
time event failures.

The recording of the Linux specific sync_device_ts is done in the
receive path for now in case we do have the right information
available.  I need to investigate as to how-much it may make sense
to also migrate it into net80211 in the future depending on the
usage in other drivers (or how we did handle this in the past in
natively ported versions, e.g. iwm).

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
This commit is contained in:
Bjoern A. Zeeb 2022-01-15 22:22:30 +00:00
parent f3229b62a1
commit c8dafefaee
2 changed files with 61 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
sys/compat/linuxkpi/common/include/net/mac80211.h
View File

@ -186,9 +186,9 @@ struct ieee80211_bss_conf {
size_t ssid_len;
uint8_t ssid[IEEE80211_NWID_LEN];
uint16_t aid;
uint16_t beacon_int;
uint16_t ht_operation_mode;
int arp_addr_cnt;
uint8_t dtim_period;
bool assoc;
bool idle;
@ -198,12 +198,16 @@ struct ieee80211_bss_conf {
bool use_cts_prot;
bool use_short_preamble;
bool use_short_slot;
uint16_t beacon_int;
uint32_t sync_device_ts;
uint64_t sync_tsf;
uint8_t sync_dtim_count;
int16_t txpower;
int txpower;
int ack_enabled, bssid_index, bssid_indicator, cqm_rssi_hyst, cqm_rssi_thold, ema_ap, frame_time_rts_th, ftm_responder;
int htc_trig_based_pkt_ext;
int multi_sta_back_32bit, nontransmitted;
int profile_periodicity, sync_device_ts, sync_dtim_count, sync_tsf;
int profile_periodicity;
int twt_requester, uora_exists, uora_ocw_range;
int assoc_capability, enable_beacon, hidden_ssid, ibss_joined, mcast_rate, twt_protected;
unsigned long basic_rates;
@ -446,34 +450,34 @@ enum ieee80211_rx_status_flags {
struct ieee80211_rx_status {
/* TODO FIXME, this is too large. Over-reduce types to u8 where possible. */
u8 boottime_ns;
u8 mactime;
u8 device_timestamp;
uint64_t boottime_ns;
uint64_t mactime;
uint32_t device_timestamp;
enum ieee80211_rx_status_flags flag;
u16 freq;
u8 bw;
uint16_t freq;
uint8_t bw;
#define RATE_INFO_BW_20 0x01
#define RATE_INFO_BW_40 0x02
#define RATE_INFO_BW_80 0x04
#define RATE_INFO_BW_160 0x08
#define RATE_INFO_BW_HE_RU 0x10
u8 encoding;
uint8_t encoding;
#define RX_ENC_LEGACY 0x00
#define RX_ENC_HE 0x01
#define RX_ENC_HT 0x02
#define RX_ENC_VHT 0x04
u8 ampdu_reference;
u8 band;
u8 chains;
u8 chain_signal[3];
u8 signal;
u8 enc_flags;
u8 he_dcm;
u8 he_gi;
u8 he_ru;
u8 zero_length_psdu_type;
uint8_t nss;
uint8_t rate_idx;
uint8_t ampdu_reference;
uint8_t band;
uint8_t chains;
uint8_t chain_signal[4];
uint8_t signal;
uint8_t enc_flags;
uint8_t he_dcm;
uint8_t he_gi;
uint8_t he_ru;
uint8_t zero_length_psdu_type;
uint8_t nss;
uint8_t rate_idx;
};
struct ieee80211_scan_ies {

40
sys/compat/linuxkpi/common/src/linux_80211.c
View File

@ -779,6 +779,12 @@ lkpi_sta_scan_to_auth(struct ieee80211vap *vap, enum ieee80211_state nstate, int
if (vif->bss_conf.beacon_int < 16)
vif->bss_conf.beacon_int = 16;
bss_changed |= BSS_CHANGED_BEACON_INT;
vif->bss_conf.dtim_period = vap->iv_dtim_period;
bss_changed |= BSS_CHANGED_BEACON_INFO;
vif->bss_conf.sync_dtim_count = vap->iv_dtim_count;
vif->bss_conf.sync_tsf = le64toh(ni->ni_tstamp.tsf);
/* vif->bss_conf.sync_device_ts = set in linuxkpi_ieee80211_rx. */
/* Should almost assert it is this. */
vif->bss_conf.assoc = false;
vif->bss_conf.aid = 0;
@ -3077,7 +3083,6 @@ linuxkpi_ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_rx_stats rx_stats;
struct ieee80211_node *ni;
struct ieee80211vap *vap;
struct ieee80211_frame_min *wh;
struct ieee80211_hdr *hdr;
struct lkpi_sta *lsta;
int i, offset, ok, type;
@ -3127,11 +3132,11 @@ linuxkpi_ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
/* Implement a dump_rxcb() !!! */
if (debug_80211 & D80211_TRACE_RX)
printf("TRACE %s: RXCB: %u %u %u, %#0x, %u, %#0x, %#0x, "
printf("TRACE %s: RXCB: %ju %ju %u, %#0x, %u, %#0x, %#0x, "
"%u band %u, %u %u %u %u, %u, %#x %#x %#x %#x %u %u %u\n",
__func__,
rx_status->boottime_ns,
rx_status->mactime,
(uintmax_t)rx_status->boottime_ns,
(uintmax_t)rx_status->mactime,
rx_status->device_timestamp,
rx_status->flag,
rx_status->freq,
@ -3186,6 +3191,8 @@ no_trace_beacons:
lsta = STA_TO_LSTA(sta);
ni = ieee80211_ref_node(lsta->ni);
} else {
struct ieee80211_frame_min *wh;
wh = mtod(m, struct ieee80211_frame_min *);
ni = ieee80211_find_rxnode(ic, wh);
if (ni != NULL)
@ -3204,6 +3211,31 @@ no_trace_beacons:
if (debug_80211 & D80211_TRACE_RX)
printf("TRACE %s: sta %p lsta %p ni %p vap %p\n", __func__, sta, lsta, ni, vap);
if (ni != NULL && vap != NULL &&
ieee80211_is_beacon(hdr->frame_control) &&
rx_status->device_timestamp > 0 &&
m->m_pkthdr.len >= sizeof(struct ieee80211_frame)) {
struct lkpi_vif *lvif;
struct ieee80211_vif *vif;
struct ieee80211_frame *wh;
wh = mtod(m, struct ieee80211_frame *);
if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))
goto skip_device_ts;
lvif = VAP_TO_LVIF(vap);
vif = LVIF_TO_VIF(lvif);
IMPROVE("TIMING_BEACON_ONLY?");
/* mac80211 specific (not net80211) so keep it here. */
vif->bss_conf.sync_device_ts = rx_status->device_timestamp;
/*
* net80211 should take care of the other information (sync_tsf,
* sync_dtim_count) as otherwise we need to parse the beacon.
*/
}
skip_device_ts:
if (vap != NULL && vap->iv_state > IEEE80211_S_INIT &&
ieee80211_radiotap_active_vap(vap)) {
struct lkpi_radiotap_rx_hdr *rtap;