diff options
| author | Stefan Sperling <stsp@cvs.openbsd.org> | 2017-05-31 08:14:53 +0000 |
|---|---|---|
| committer | Stefan Sperling <stsp@cvs.openbsd.org> | 2017-05-31 08:14:53 +0000 |
| commit | 52a9c7e3c4952fb94dcfa08ac5388a04c4e91cd7 (patch) | |
| tree | 5e2f444b049f8ea89f763486a97db4c13e4fcd59 /sys | |
| parent | 14962e5ae4f25ddf3f820d98eadc4aa4f5334d92 (diff) | |
Implement support for iwm(4) firmware's missed beacon notification.
Requested by deraadt@
ok mpi@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/pci/if_iwm.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/sys/dev/pci/if_iwm.c b/sys/dev/pci/if_iwm.c index 18d5c132ed7..5f79097cb0b 100644 --- a/sys/dev/pci/if_iwm.c +++ b/sys/dev/pci/if_iwm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_iwm.c,v 1.184 2017/05/28 11:03:48 stsp Exp $ */ +/* $OpenBSD: if_iwm.c,v 1.185 2017/05/31 08:14:52 stsp Exp $ */ /* * Copyright (c) 2014, 2016 genua gmbh <info@genua.de> @@ -3535,6 +3535,34 @@ iwm_rx_tx_cmd(struct iwm_softc *sc, struct iwm_rx_packet *pkt, } } +void +iwm_rx_bmiss(struct iwm_softc *sc, struct iwm_rx_packet *pkt, + struct iwm_rx_data *data) +{ + struct ieee80211com *ic = &sc->sc_ic; + int bmiss_threshold = ic->ic_bmisstimeout / ic->ic_lintval; + struct iwm_missed_beacons_notif *mbn = (void *)pkt->data; + + if ((ic->ic_opmode != IEEE80211_M_STA) || + (ic->ic_state != IEEE80211_S_RUN)) + return; + + bus_dmamap_sync(sc->sc_dmat, data->map, sizeof(*pkt), + sizeof(*mbn), BUS_DMASYNC_POSTREAD); + + if (mbn->consec_missed_beacons_since_last_rx > bmiss_threshold) { + /* + * Rather than go directly to scan state, try to send a + * directed probe request first. If that fails then the + * state machine will drop us into scanning after timing + * out waiting for a probe response. + */ + IEEE80211_SEND_MGMT(ic, ic->ic_bss, + IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); + } + +} + int iwm_binding_cmd(struct iwm_softc *sc, struct iwm_node *in, uint32_t action) { @@ -6566,7 +6594,7 @@ iwm_notif_intr(struct iwm_softc *sc) break; case IWM_MISSED_BEACONS_NOTIFICATION: - /* OpenBSD does not provide ieee80211_beacon_miss() */ + iwm_rx_bmiss(sc, pkt, data); break; case IWM_MFUART_LOAD_NOTIFICATION: |