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net: hns3: Add timeout process in hns3_enet
This patch add timeout handler in hns3_enet.c to handle TX side timeout event, when TX timeout event occur, it will triger NIC driver into reset process. Signed-off-by: qumingguang <qumingguang@huawei.com> Signed-off-by: Lipeng <lipeng321@huawei.com> Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lipeng
David S. Miller
parent
4ed340ab8f
commit
f8fa222ca5
2 changed files with 88 additions and 0 deletions
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@ -258,6 +258,7 @@ out_start_err:
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static int hns3_nic_net_open(struct net_device *netdev)
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static int hns3_nic_net_open(struct net_device *netdev)
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{
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{
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struct hns3_nic_priv *priv = netdev_priv(netdev);
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int ret;
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int ret;
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netif_carrier_off(netdev);
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netif_carrier_off(netdev);
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@ -273,6 +274,7 @@ static int hns3_nic_net_open(struct net_device *netdev)
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return ret;
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return ret;
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}
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}
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priv->last_reset_time = jiffies;
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return 0;
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return 0;
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}
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}
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@ -1322,10 +1324,91 @@ static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
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return ret;
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return ret;
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}
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}
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static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
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{
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struct hns3_nic_priv *priv = netdev_priv(ndev);
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struct hns3_enet_ring *tx_ring = NULL;
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int timeout_queue = 0;
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int hw_head, hw_tail;
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int i;
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/* Find the stopped queue the same way the stack does */
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for (i = 0; i < ndev->real_num_tx_queues; i++) {
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struct netdev_queue *q;
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unsigned long trans_start;
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q = netdev_get_tx_queue(ndev, i);
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trans_start = q->trans_start;
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if (netif_xmit_stopped(q) &&
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time_after(jiffies,
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(trans_start + ndev->watchdog_timeo))) {
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timeout_queue = i;
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break;
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}
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}
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if (i == ndev->num_tx_queues) {
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netdev_info(ndev,
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"no netdev TX timeout queue found, timeout count: %llu\n",
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priv->tx_timeout_count);
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return false;
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}
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tx_ring = priv->ring_data[timeout_queue].ring;
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hw_head = readl_relaxed(tx_ring->tqp->io_base +
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HNS3_RING_TX_RING_HEAD_REG);
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hw_tail = readl_relaxed(tx_ring->tqp->io_base +
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HNS3_RING_TX_RING_TAIL_REG);
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netdev_info(ndev,
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"tx_timeout count: %llu, queue id: %d, SW_NTU: 0x%x, SW_NTC: 0x%x, HW_HEAD: 0x%x, HW_TAIL: 0x%x, INT: 0x%x\n",
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priv->tx_timeout_count,
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timeout_queue,
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tx_ring->next_to_use,
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tx_ring->next_to_clean,
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hw_head,
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hw_tail,
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readl(tx_ring->tqp_vector->mask_addr));
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return true;
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}
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static void hns3_nic_net_timeout(struct net_device *ndev)
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{
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struct hns3_nic_priv *priv = netdev_priv(ndev);
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unsigned long last_reset_time = priv->last_reset_time;
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struct hnae3_handle *h = priv->ae_handle;
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if (!hns3_get_tx_timeo_queue_info(ndev))
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return;
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priv->tx_timeout_count++;
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/* This timeout is far away enough from last timeout,
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* if timeout again,set the reset type to PF reset
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*/
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if (time_after(jiffies, (last_reset_time + 20 * HZ)))
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priv->reset_level = HNAE3_FUNC_RESET;
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/* Don't do any new action before the next timeout */
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else if (time_before(jiffies, (last_reset_time + ndev->watchdog_timeo)))
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return;
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priv->last_reset_time = jiffies;
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if (h->ae_algo->ops->reset_event)
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h->ae_algo->ops->reset_event(h, priv->reset_level);
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priv->reset_level++;
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if (priv->reset_level > HNAE3_GLOBAL_RESET)
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priv->reset_level = HNAE3_GLOBAL_RESET;
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}
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static const struct net_device_ops hns3_nic_netdev_ops = {
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static const struct net_device_ops hns3_nic_netdev_ops = {
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.ndo_open = hns3_nic_net_open,
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.ndo_open = hns3_nic_net_open,
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.ndo_stop = hns3_nic_net_stop,
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.ndo_stop = hns3_nic_net_stop,
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.ndo_start_xmit = hns3_nic_net_xmit,
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.ndo_start_xmit = hns3_nic_net_xmit,
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.ndo_tx_timeout = hns3_nic_net_timeout,
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.ndo_set_mac_address = hns3_nic_net_set_mac_address,
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.ndo_set_mac_address = hns3_nic_net_set_mac_address,
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.ndo_change_mtu = hns3_nic_change_mtu,
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.ndo_change_mtu = hns3_nic_change_mtu,
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.ndo_set_features = hns3_nic_set_features,
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.ndo_set_features = hns3_nic_set_features,
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@ -2763,6 +2846,9 @@ static int hns3_client_init(struct hnae3_handle *handle)
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priv->dev = &pdev->dev;
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priv->dev = &pdev->dev;
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priv->netdev = netdev;
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priv->netdev = netdev;
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priv->ae_handle = handle;
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priv->ae_handle = handle;
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priv->last_reset_time = jiffies;
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priv->reset_level = HNAE3_FUNC_RESET;
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priv->tx_timeout_count = 0;
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handle->kinfo.netdev = netdev;
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handle->kinfo.netdev = netdev;
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handle->priv = (void *)priv;
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handle->priv = (void *)priv;
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@ -518,6 +518,8 @@ struct hns3_nic_priv {
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/* The most recently read link state */
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/* The most recently read link state */
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int link;
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int link;
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u64 tx_timeout_count;
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u64 tx_timeout_count;
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enum hnae3_reset_type reset_level;
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unsigned long last_reset_time;
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unsigned long state;
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unsigned long state;
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