55bf5c9385
Also clear x-bit for old patch files 0013-xxx and 0014-xxx. Change-Id: I217fdbfb32cef1ae575c668270d3baf593e688c6 Signed-off-by: John Lo <loj@cisco.com>
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From 8d336ba9cbcb4832b992201497afe07afcd4f2e1 Mon Sep 17 00:00:00 2001
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From: John Daley <johndale@cisco.com>
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Date: Fri, 1 Jul 2016 12:32:45 -0700
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Subject: [PATCH 19/25] enic: fix Rx queue initialization after restarting a
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device
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If you stop then start a port that had already received some packets,
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the NIC could fetch discriptors from the wrong location. This could
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effectivly reduce the size of the Rx queue by a random amount and
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cause packet drop or reduced performance.
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Reset the NIC fetch index to 0 when allocating and posting mbuf
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addresses to the NIC.
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Fixes: 947d860c821f ("enic: improve Rx performance")
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Signed-off-by: John Daley <johndale@cisco.com>
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Reviewed-by: Nelson Escobar <neescoba@cisco.com>
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---
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drivers/net/enic/enic_main.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
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index be17707..68532d3 100644
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--- a/drivers/net/enic/enic_main.c
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+++ b/drivers/net/enic/enic_main.c
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@@ -346,6 +346,7 @@ enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
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dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
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enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
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iowrite32(rq->posted_index, &rq->ctrl->posted_index);
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+ iowrite32(0, &rq->ctrl->fetch_index);
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rte_rmb();
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// printf("posted %d buffers to %s rq\n", rq->ring.desc_count,
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--
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2.7.0
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