diff options
author | Julian Wiedmann <jwi@linux.ibm.com> | 2019-11-14 11:19:15 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-11-14 18:16:50 -0800 |
commit | 5fd3fcbb8af8f9bc82afd84937393c193b95c204 (patch) | |
tree | d86689584d7d385cf01565441d21e766faa07fc0 /drivers/s390/net/qeth_core.h | |
parent | 845ef9047b1f4e8ea3b8865140066b08fe93d05c (diff) |
s390/qeth: support per-frame invalidation
Each RX buffer may contain up to 64KB worth of data. In case the device
needs to discard a packet _after_ already having reserved space for it
in the buffer, the whole buffer gets set to ERROR state. As the buffer
might contain any number of good packets, this can result in collateral
packet loss.
qeth can provide relief by enabling per-frame invalidation. The RX
buffer is then presented as usual, we just need to spot & drop any
individual packet that was flagged as invalid.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_core.h')
-rw-r--r-- | drivers/s390/net/qeth_core.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 14edc892f7c1..52fd3c4bb132 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -368,6 +368,7 @@ enum qeth_header_ids { QETH_HEADER_TYPE_L3_TSO = 0x03, QETH_HEADER_TYPE_OSN = 0x04, QETH_HEADER_TYPE_L2_TSO = 0x06, + QETH_HEADER_MASK_INVAL = 0x80, }; /* flags for qeth_hdr.ext_flags */ #define QETH_HDR_EXT_VLAN_FRAME 0x01 @@ -485,6 +486,7 @@ struct qeth_card_stats { u64 rx_bytes; u64 rx_multicast; u64 rx_length_errors; + u64 rx_frame_errors; u64 rx_fifo_errors; }; |