Handle RX Keymiss events.

The AR9003 series NICs implement a separate RX error to signal that a
Keycache miss occured.  The earlier NICs would not set the key index
valid bit.

I'll dig into the difference between "no key index bit set" and "keycache
miss".

3 files changed, 13 insertions, 1 deletions

diff --git a/sys/dev/ath/if_ath_rx.c b/sys/dev/ath/if_ath_rx.c
index eba6ba539608..9e90977b9057 100644
--- a/sys/dev/ath/if_ath_rx.c
+++ b/sys/dev/ath/if_ath_rx.c
@@ -534,6 +534,14 @@ ath_rx_pkt(struct ath_softc *sc, struct ath_rx_status *rs, HAL_STATUS status,
 				goto rx_accept;
 			sc->sc_stats.ast_rx_badcrypt++;
 		}
+		/*
+		 * Similar as above - if the failure was a keymiss
+		 * just punt it up to the upper layers for now.
+		 */
+		if (rs->rs_status & HAL_RXERR_KEYMISS) {
+			sc->sc_stats.ast_rx_keymiss++;
+			goto rx_accept;
+		}
 		if (rs->rs_status & HAL_RXERR_MIC) {
 			sc->sc_stats.ast_rx_badmic++;
 			/*
diff --git a/sys/dev/ath/if_ath_sysctl.c b/sys/dev/ath/if_ath_sysctl.c
index ff75888e047d..e1e9426c8fa1 100644
--- a/sys/dev/ath/if_ath_sysctl.c
+++ b/sys/dev/ath/if_ath_sysctl.c
@@ -934,6 +934,8 @@ ath_sysctl_stats_attach(struct ath_softc *sc)
 	SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "ast_tx_mcastq_overflow",
 	    CTLFLAG_RD, &sc->sc_stats.ast_tx_mcastq_overflow, 0,
 	    "Number of multicast frames exceeding maximum mcast queue depth");
+	SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "ast_rx_keymiss", CTLFLAG_RD,
+	    &sc->sc_stats.ast_rx_keymiss, 0, "");
 	
 	/* Attach the RX phy error array */
 	ath_sysctl_stats_attach_rxphyerr(sc, child);
diff --git a/sys/dev/ath/if_athioctl.h b/sys/dev/ath/if_athioctl.h
index 71813ae18354..f40e1be10ac1 100644
--- a/sys/dev/ath/if_athioctl.h
+++ b/sys/dev/ath/if_athioctl.h
@@ -161,7 +161,9 @@ struct ath_stats {
 	u_int32_t	ast_tx_aggr_ok;		/* aggregate TX ok */
 	u_int32_t	ast_tx_aggr_fail;	/* aggregate TX failed */
 	u_int32_t	ast_tx_mcastq_overflow;	/* multicast queue overflow */
-	u_int32_t	ast_pad[1];
+	u_int32_t	ast_rx_keymiss;
+
+	u_int32_t	ast_pad[16];
 };
 
 #define	SIOCGATHSTATS	_IOWR('i', 137, struct ifreq)