sfc: Clean up RX event handling
Add 'likely' hint to test of rx_checksum_enabled.
Don't count IP fragments; the IP stack can do that.
Do count non-matching multicast packets.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 539d022..2f219ce 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -734,7 +734,7 @@
bool rx_ev_tcp_udp_chksum_err, rx_ev_eth_crc_err;
bool rx_ev_frm_trunc, rx_ev_drib_nib, rx_ev_tobe_disc;
bool rx_ev_other_err, rx_ev_pause_frm;
- bool rx_ev_ip_frag_err, rx_ev_hdr_type, rx_ev_mcast_pkt;
+ bool rx_ev_hdr_type, rx_ev_mcast_pkt;
unsigned rx_ev_pkt_type;
rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE);
@@ -743,7 +743,6 @@
rx_ev_pkt_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_TYPE);
rx_ev_buf_owner_id_err = EFX_QWORD_FIELD(*event,
FSF_AZ_RX_EV_BUF_OWNER_ID_ERR);
- rx_ev_ip_frag_err = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_IP_FRAG_ERR);
rx_ev_ip_hdr_chksum_err = EFX_QWORD_FIELD(*event,
FSF_AZ_RX_EV_IP_HDR_CHKSUM_ERR);
rx_ev_tcp_udp_chksum_err = EFX_QWORD_FIELD(*event,
@@ -771,8 +770,6 @@
else if (rx_ev_tcp_udp_chksum_err)
++rx_queue->channel->n_rx_tcp_udp_chksum_err;
}
- if (rx_ev_ip_frag_err)
- ++rx_queue->channel->n_rx_ip_frag_err;
/* The frame must be discarded if any of these are true. */
*discard = (rx_ev_eth_crc_err | rx_ev_frm_trunc | rx_ev_drib_nib |
@@ -855,7 +852,7 @@
* UDP/IPv4, then we can rely on the hardware checksum.
*/
checksummed =
- efx->rx_checksum_enabled &&
+ likely(efx->rx_checksum_enabled) &&
(rx_ev_hdr_type == FSE_AB_RX_EV_HDR_TYPE_IPV4_TCP ||
rx_ev_hdr_type == FSE_AB_RX_EV_HDR_TYPE_IPV4_UDP);
} else {
@@ -870,8 +867,10 @@
unsigned int rx_ev_mcast_hash_match =
EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_HASH_MATCH);
- if (unlikely(!rx_ev_mcast_hash_match))
+ if (unlikely(!rx_ev_mcast_hash_match)) {
+ ++channel->n_rx_mcast_mismatch;
discard = true;
+ }
}
channel->irq_mod_score += 2;