From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Harton Subject: [PATCH] vmxnet3: replenish ring buffers in rx processing Date: Fri, 25 Aug 2017 11:22:11 -0400 Message-ID: <20170825152211.10911-1-dharton@cisco.com> Cc: dev@dpdk.org, David Harton To: skhare@vmware.com Return-path: Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by dpdk.org (Postfix) with ESMTP id 6675C7D0B for ; Fri, 25 Aug 2017 17:22:13 +0200 (CEST) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 --- 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