diff options
Diffstat (limited to 'dpdk/dpdk-16.04_patches/0019-enic-fix-Rx-queue-initialization-after-restarting-a-.patch')
| -rw-r--r-- | dpdk/dpdk-16.04_patches/0019-enic-fix-Rx-queue-initialization-after-restarting-a-.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/dpdk/dpdk-16.04_patches/0019-enic-fix-Rx-queue-initialization-after-restarting-a-.patch b/dpdk/dpdk-16.04_patches/0019-enic-fix-Rx-queue-initialization-after-restarting-a-.patch new file mode 100644 index 00000000..3e107486 --- /dev/null +++ b/dpdk/dpdk-16.04_patches/0019-enic-fix-Rx-queue-initialization-after-restarting-a-.patch @@ -0,0 +1,37 @@ +From 8d336ba9cbcb4832b992201497afe07afcd4f2e1 Mon Sep 17 00:00:00 2001 +From: John Daley <johndale@cisco.com> +Date: Fri, 1 Jul 2016 12:32:45 -0700 +Subject: [PATCH 19/25] enic: fix Rx queue initialization after restarting a + device + +If you stop then start a port that had already received some packets, +the NIC could fetch discriptors from the wrong location. This could +effectivly reduce the size of the Rx queue by a random amount and +cause packet drop or reduced performance. + +Reset the NIC fetch index to 0 when allocating and posting mbuf +addresses to the NIC. + +Fixes: 947d860c821f ("enic: improve Rx performance") + +Signed-off-by: John Daley <johndale@cisco.com> +Reviewed-by: Nelson Escobar <neescoba@cisco.com> +--- + drivers/net/enic/enic_main.c | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c +index be17707..68532d3 100644 +--- a/drivers/net/enic/enic_main.c ++++ b/drivers/net/enic/enic_main.c +@@ -346,6 +346,7 @@ enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq) + dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n", + enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold); + iowrite32(rq->posted_index, &rq->ctrl->posted_index); ++ iowrite32(0, &rq->ctrl->fetch_index); + rte_rmb(); + + // printf("posted %d buffers to %s rq\n", rq->ring.desc_count, +-- +2.7.0 + |