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: sta...@dpdk.org
Signed-off-by: Yuanhan Liu <yuanhan....@linux.intel.com>
---
drivers/net/virtio/virtio_ethdev.c | 7 ++++++-
drivers/net/virtio/virtio_pci.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c
b/drivers/net/virtio/virtio_ethdev.c
index 78cb3e8..b2f9570 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1768,6 +1768,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev
*dev,
txvq = dev->data->tx_queues[i];
VIRTQUEUE_DUMP(txvq->vq);
}
+ hw->started = 1;
return 0;
}
@@ -1823,6 +1824,7 @@ 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;
@@ -1831,6 +1833,7 @@ static void virtio_dev_free_mbufs(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);
}
@@ -1847,7 +1850,9 @@ static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
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 0362acd..e7290d7 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;
--
1.9.0
