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qed: Add ll2 option for dropping a tx packet

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The option of sending a packet on the ll2 and dropping it exists in
hardware and was not used until now, thus not exposed.
The iWARP unaligned MPA flow requires this functionality for
flushing the tx queue.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kalderon 2017-10-09 12:37:45 +03:00 committed by David S. Miller
parent ed468ebee0
commit 77caa792f5
2 changed files with 15 additions and 2 deletions
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16
drivers/net/ethernet/qlogic/qed/qed_ll2.c
View File

@ -1597,8 +1597,20 @@ qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
: CORE_RROCE;
tx_dest = (pkt->tx_dest == QED_LL2_TX_DEST_NW) ? CORE_TX_DEST_NW
: CORE_TX_DEST_LB;
switch (pkt->tx_dest) {
case QED_LL2_TX_DEST_NW:
tx_dest = CORE_TX_DEST_NW;
break;
case QED_LL2_TX_DEST_LB:
tx_dest = CORE_TX_DEST_LB;
break;
case QED_LL2_TX_DEST_DROP:
tx_dest = CORE_TX_DEST_DROP;
break;
default:
tx_dest = CORE_TX_DEST_LB;
break;
}
start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);

1
include/linux/qed/qed_ll2_if.h
View File

@ -64,6 +64,7 @@ enum qed_ll2_roce_flavor_type {
enum qed_ll2_tx_dest {
QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
QED_LL2_TX_DEST_MAX
};