From: Yuanhan Liu Date: Fri, 14 Apr 2017 06:36:45 +0000 (+0800) Subject: net/virtio: fix link status always being up X-Git-Tag: spdx-start~3501 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=aa9f060617653bac99f41dedfd518b7034374139;p=dpdk.git net/virtio: fix link status always being up The virtio port link status will always be UP, even the port is stopped: testpmd> port stop 0 Stopping ports... Checking link statuses... Port 0 Link Up - speed 10000 Mbps - full-duplex Done The link status is queried by link_update callback when LSC is disabled. Which in turn queries the "status" field. However, the "status" is read-only. I couldn't think of some proper ways to change the status without doing device reset. Instead of doing (the heavy) reset at stop, this patch introduced a flag, which is set to 1 and 0 on start and stop, respectively. When it's set to 0, the link status is set to DOWN unconditionally. Fixes: a85786dc816f ("virtio: fix states handling during initialization") Cc: stable@dpdk.org Signed-off-by: Yuanhan Liu --- diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index f0a0219ca2..e6c57b3e45 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -1776,6 +1776,7 @@ virtio_dev_start(struct rte_eth_dev *dev) txvq = dev->data->tx_queues[i]; VIRTQUEUE_DUMP(txvq->vq); } + hw->started = 1; return 0; } @@ -1831,6 +1832,7 @@ static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) static void virtio_dev_stop(struct rte_eth_dev *dev) { + struct virtio_hw *hw = dev->data->dev_private; struct rte_eth_link link; struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; @@ -1839,6 +1841,7 @@ virtio_dev_stop(struct rte_eth_dev *dev) if (intr_conf->lsc || intr_conf->rxq) rte_intr_disable(dev->intr_handle); + hw->started = 0; memset(&link, 0, sizeof(link)); virtio_dev_atomic_write_link_status(dev, &link); } @@ -1855,7 +1858,9 @@ virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complet link.link_duplex = ETH_LINK_FULL_DUPLEX; link.link_speed = SPEED_10G; - if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { + if (hw->started == 0) { + link.link_status = ETH_LINK_DOWN; + } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { PMD_INIT_LOG(DEBUG, "Get link status from hw"); vtpci_read_dev_config(hw, offsetof(struct virtio_net_config, status), diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h index 0362acd5ee..e7290d7f1d 100644 --- a/drivers/net/virtio/virtio_pci.h +++ b/drivers/net/virtio/virtio_pci.h @@ -253,6 +253,7 @@ struct virtio_hw { uint64_t req_guest_features; uint64_t guest_features; uint32_t max_queue_pairs; + uint16_t started; uint16_t max_mtu; uint16_t vtnet_hdr_size; uint8_t vlan_strip;