From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: reset NAPI context during queue init
Patch-mainline: v4.17-rc1
Git-commit: 1b45c80be08d11e3f48c514a63d8c1214829fc19
References: FATE#326350, LTC#169511, bsc#1113509
Summary: qeth: performance improvements
Description: This adds recent functional and performance improvements for the
qeth network driver.
Primarily this brings Scatter-Gather support for HiperSockets,
reduced CPU consumption in the L3 IPv4 transmit path for OSA,
improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
support for Scatter-Gather on z/VM virtual NICs, and
support for delayed GRO flushing.
For sanity & stability reasons, this effectively constitutes a
backport of the qeth device driver from 4.19 mainline.
Upstream-Description:
s390/qeth: reset NAPI context during queue init
init_qdio_queues() resets the Input Queue's overall QDIO state, and
positions the buffer cursor back to 0. So this is the obvious place to
also reset the queue's NAPI context (in contrast to doing it rather
randomly in the middle of the big set_online() path).
No functional change.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/net/qeth_core_main.c | 4 ++--
drivers/s390/net/qeth_l2_main.c | 1 -
drivers/s390/net/qeth_l3_main.c | 1 -
3 files changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2891,8 +2891,8 @@ int qeth_init_qdio_queues(struct qeth_ca
QETH_DBF_TEXT(SETUP, 2, "initqdqs");
/* inbound queue */
- qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
- QDIO_MAX_BUFFERS_PER_Q);
+ qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
+ memset(&card->rx, 0, sizeof(struct qeth_rx));
qeth_initialize_working_pool_list(card);
/*give only as many buffers to hardware as we have buffer pool entries*/
for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1100,7 +1100,6 @@ static int __qeth_l2_set_online(struct c
qeth_l2_setup_bridgeport_attrs(card);
card->state = CARD_STATE_HARDSETUP;
- memset(&card->rx, 0, sizeof(struct qeth_rx));
qeth_print_status_message(card);
/* softsetup */
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2904,7 +2904,6 @@ static int __qeth_l3_set_online(struct c
card->info.hwtrap = 0;
card->state = CARD_STATE_HARDSETUP;
- memset(&card->rx, 0, sizeof(struct qeth_rx));
qeth_print_status_message(card);
/* softsetup */