[dpdk-dev] [PATCH] vmxnet3: replenish ring buffers in rx processing
David Harton
dharton at cisco.com
Fri Aug 25 17:22:11 CEST 2017
vmxnet3 rx processing should replenish ring buffers after new buffers
are available to prevent the interface from getting stuck in a state
that no new work is processed.
Signed-off-by: David Harton <dharton at cisco.com>
---
drivers/net/vmxnet3/vmxnet3_rxtx.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index d9cf437..9861d35 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -880,6 +880,23 @@
}
}
+ if (unlikely(nb_rxd == 0)) {
+ uint32_t avail;
+ for (ring_idx = 0; ring_idx < VMXNET3_RX_CMDRING_SIZE; ring_idx++) {
+ avail = vmxnet3_cmd_ring_desc_avail(&rxq->cmd_ring[ring_idx]);
+ if (unlikely(avail > 0)) {
+ /* try to alloc new buf and renew descriptors */
+ vmxnet3_post_rx_bufs(rxq, ring_idx);
+ }
+ }
+ if (unlikely(rxq->shared->ctrl.updateRxProd)) {
+ for (ring_idx = 0; ring_idx < VMXNET3_RX_CMDRING_SIZE; ring_idx++) {
+ VMXNET3_WRITE_BAR0_REG(hw, rxprod_reg[ring_idx] + (rxq->queue_id * VMXNET3_REG_ALIGN),
+ rxq->cmd_ring[ring_idx].next2fill);
+ }
+ }
+ }
+
return nb_rx;
}
--
1.8.3.1
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