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authorVratko Polak <vrpolak@cisco.com>2023-11-22 13:39:47 +0100
committerVratko Polak <vrpolak@cisco.com>2023-11-22 13:39:47 +0100
commit20e37d2639d54f7bf6ec28e80f3da1f7316f16a2 (patch)
treeec3f106979dd7525eae263dd0a5cb7f9cdaf23c0
parent9375266bd373ea3c86160d3262445607445a90d7 (diff)
avf: put sentinel at correct place
The previous fix was adding the sentinel before refilling rx, which gave the NIC time to overwrite it with a new descriptor. Ticket: VPP-2087 Type: fix Fixes: 8b4d474abd62c623502ad9a4a279a9b4535ca0c1 Change-Id: I32bde4a763a62fb66c5c3871d9f10af6066e2d47 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
-rw-r--r--src/plugins/avf/input.c6
-rw-r--r--src/plugins/dev_iavf/rx_node.c6
2 files changed, 6 insertions, 6 deletions
diff --git a/src/plugins/avf/input.c b/src/plugins/avf/input.c
index 3c3d6c07c2d..ca69407fc59 100644
--- a/src/plugins/avf/input.c
+++ b/src/plugins/avf/input.c
@@ -125,6 +125,9 @@ avf_rxq_refill (vlib_main_t * vm, vlib_node_runtime_t * node, avf_rxq_t * rxq,
n_alloc -= 8;
}
+ /* RXQ can be smaller than 256 packets, especially if jumbo. */
+ rxq->descs[slot].qword[1] = 0;
+
avf_tail_write (rxq->qrx_tail, slot);
}
@@ -423,9 +426,6 @@ no_more_desc:
rxq->next = next;
rxq->n_enqueued -= n_rx_packets + n_tail_desc;
- /* avoid eating our own tail */
- rxq->descs[(next + rxq->n_enqueued) & mask].qword[1] = 0;
-
#if defined(CLIB_HAVE_VEC256) || defined(CLIB_HAVE_VEC128)
or_qw1 |= or_q1x4[0] | or_q1x4[1] | or_q1x4[2] | or_q1x4[3];
#endif
diff --git a/src/plugins/dev_iavf/rx_node.c b/src/plugins/dev_iavf/rx_node.c
index 946adb1df1b..ee6d7e8def0 100644
--- a/src/plugins/dev_iavf/rx_node.c
+++ b/src/plugins/dev_iavf/rx_node.c
@@ -111,6 +111,9 @@ iavf_rxq_refill (vlib_main_t *vm, vlib_node_runtime_t *node,
n_alloc -= 8;
}
+ /* RXQ can be smaller than 256 packets, especially if jumbo. */
+ arq->descs[slot].qword[1] = 0;
+
__atomic_store_n (arq->qrx_tail, slot, __ATOMIC_RELEASE);
}
@@ -399,9 +402,6 @@ no_more_desc:
arq->next = next;
arq->n_enqueued -= n_rx_packets + n_tail_desc;
- /* avoid eating our own tail */
- arq->descs[(next + arq->n_enqueued) & mask].qword[1] = 0;
-
#if defined(CLIB_HAVE_VEC256) || defined(CLIB_HAVE_VEC128)
or_qw1 |= or_q1x4[0] | or_q1x4[1] | or_q1x4[2] | or_q1x4[3];
#endif