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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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liquidio CN23XX: VF link status
Adds support for VF link status related changes. Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -163,6 +163,186 @@ static void ifstate_reset(struct lio *lio, int state_flag)
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atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag)));
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}
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/**
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* \brief Stop Tx queues
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* @param netdev network device
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*/
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static void txqs_stop(struct net_device *netdev)
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{
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if (netif_is_multiqueue(netdev)) {
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int i;
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for (i = 0; i < netdev->num_tx_queues; i++)
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netif_stop_subqueue(netdev, i);
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} else {
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netif_stop_queue(netdev);
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}
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}
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/**
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* \brief Start Tx queues
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* @param netdev network device
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*/
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static void txqs_start(struct net_device *netdev)
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{
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if (netif_is_multiqueue(netdev)) {
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int i;
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for (i = 0; i < netdev->num_tx_queues; i++)
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netif_start_subqueue(netdev, i);
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} else {
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netif_start_queue(netdev);
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}
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}
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/**
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* \brief Wake Tx queues
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* @param netdev network device
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*/
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static void txqs_wake(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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if (netif_is_multiqueue(netdev)) {
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int i;
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for (i = 0; i < netdev->num_tx_queues; i++) {
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int qno = lio->linfo.txpciq[i % (lio->linfo.num_txpciq)]
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.s.q_no;
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if (__netif_subqueue_stopped(netdev, i)) {
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INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
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tx_restart, 1);
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netif_wake_subqueue(netdev, i);
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}
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}
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} else {
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INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
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tx_restart, 1);
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netif_wake_queue(netdev);
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}
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}
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/**
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* \brief Start Tx queue
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* @param netdev network device
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*/
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static void start_txq(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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if (lio->linfo.link.s.link_up) {
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txqs_start(netdev);
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return;
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}
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}
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/**
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* \brief Print link information
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* @param netdev network device
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*/
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static void print_link_info(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED) {
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struct oct_link_info *linfo = &lio->linfo;
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if (linfo->link.s.link_up) {
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netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
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linfo->link.s.speed,
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(linfo->link.s.duplex) ? "Full" : "Half");
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} else {
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netif_info(lio, link, lio->netdev, "Link Down\n");
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}
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}
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}
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/**
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* \brief Routine to notify MTU change
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* @param work work_struct data structure
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*/
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static void octnet_link_status_change(struct work_struct *work)
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{
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struct cavium_wk *wk = (struct cavium_wk *)work;
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struct lio *lio = (struct lio *)wk->ctxptr;
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rtnl_lock();
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call_netdevice_notifiers(NETDEV_CHANGEMTU, lio->netdev);
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rtnl_unlock();
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}
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/**
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* \brief Sets up the mtu status change work
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* @param netdev network device
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*/
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static int setup_link_status_change_wq(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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struct octeon_device *oct = lio->oct_dev;
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lio->link_status_wq.wq = alloc_workqueue("link-status",
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WQ_MEM_RECLAIM, 0);
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if (!lio->link_status_wq.wq) {
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dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
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return -1;
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}
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INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
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octnet_link_status_change);
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lio->link_status_wq.wk.ctxptr = lio;
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return 0;
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}
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static void cleanup_link_status_change_wq(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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if (lio->link_status_wq.wq) {
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cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
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destroy_workqueue(lio->link_status_wq.wq);
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}
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}
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/**
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* \brief Update link status
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* @param netdev network device
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* @param ls link status structure
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*
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* Called on receipt of a link status response from the core application to
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* update each interface's link status.
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*/
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static void update_link_status(struct net_device *netdev,
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union oct_link_status *ls)
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{
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struct lio *lio = GET_LIO(netdev);
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struct octeon_device *oct = lio->oct_dev;
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if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
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lio->linfo.link.u64 = ls->u64;
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print_link_info(netdev);
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lio->link_changes++;
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if (lio->linfo.link.s.link_up) {
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netif_carrier_on(netdev);
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txqs_wake(netdev);
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} else {
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netif_carrier_off(netdev);
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txqs_stop(netdev);
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}
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if (lio->linfo.link.s.mtu < netdev->mtu) {
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dev_warn(&oct->pci_dev->dev,
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"PF has changed the MTU for gmx port. Reducing the mtu from %d to %d\n",
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netdev->mtu, lio->linfo.link.s.mtu);
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lio->mtu = lio->linfo.link.s.mtu;
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netdev->mtu = lio->linfo.link.s.mtu;
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queue_delayed_work(lio->link_status_wq.wq,
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&lio->link_status_wq.wk.work, 0);
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}
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}
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}
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static
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int liquidio_schedule_msix_droq_pkt_handler(struct octeon_droq *droq, u64 ret)
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{
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@ -499,6 +679,8 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
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if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
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unregister_netdev(netdev);
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cleanup_link_status_change_wq(netdev);
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free_netdev(netdev);
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oct->props[ifidx].gmxport = -1;
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@ -634,6 +816,28 @@ static u16 select_q(struct net_device *dev, struct sk_buff *skb,
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return (u16)(qindex % (lio->linfo.num_txpciq));
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}
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/**
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* \brief Net device open for LiquidIO
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* @param netdev network device
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*/
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static int liquidio_open(struct net_device *netdev)
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{
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struct lio *lio = GET_LIO(netdev);
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struct octeon_device *oct = lio->oct_dev;
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ifstate_set(lio, LIO_IFSTATE_RUNNING);
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/* Ready for link status updates */
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lio->intf_open = 1;
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netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
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start_txq(netdev);
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dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
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return 0;
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}
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/**
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* \brief Net device stop for LiquidIO
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* @param netdev network device
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@ -653,6 +857,8 @@ static int liquidio_stop(struct net_device *netdev)
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ifstate_reset(lio, LIO_IFSTATE_RUNNING);
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txqs_stop(netdev);
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dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
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return 0;
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@ -758,11 +964,47 @@ static int liquidio_set_features(struct net_device *netdev,
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}
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static const struct net_device_ops lionetdevops = {
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.ndo_open = liquidio_open,
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.ndo_stop = liquidio_stop,
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.ndo_fix_features = liquidio_fix_features,
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.ndo_set_features = liquidio_set_features,
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.ndo_select_queue = select_q,
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};
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static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
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{
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struct octeon_device *oct = (struct octeon_device *)buf;
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struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
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union oct_link_status *ls;
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int gmxport = 0;
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int i;
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if (recv_pkt->buffer_size[0] != sizeof(*ls)) {
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dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
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recv_pkt->buffer_size[0],
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recv_pkt->rh.r_nic_info.gmxport);
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goto nic_info_err;
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}
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gmxport = recv_pkt->rh.r_nic_info.gmxport;
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ls = (union oct_link_status *)get_rbd(recv_pkt->buffer_ptr[0]);
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octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
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for (i = 0; i < oct->ifcount; i++) {
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if (oct->props[i].gmxport == gmxport) {
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update_link_status(oct->props[i].netdev, ls);
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break;
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}
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}
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nic_info_err:
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for (i = 0; i < recv_pkt->buffer_count; i++)
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recv_buffer_free(recv_pkt->buffer_ptr[i]);
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octeon_free_recv_info(recv_info);
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return 0;
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}
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/**
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* \brief Setup network interfaces
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* @param octeon_dev octeon device
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@ -788,6 +1030,10 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
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ifidx_or_pfnum = octeon_dev->pf_num;
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/* This is to handle link status changes */
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octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
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lio_nic_info, octeon_dev);
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for (i = 0; i < octeon_dev->ifcount; i++) {
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resp_size = sizeof(struct liquidio_if_cfg_resp);
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ctx_size = sizeof(struct liquidio_if_cfg_context);
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@ -946,6 +1192,9 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
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liquidio_set_feature(netdev, OCTNET_CMD_VERBOSE_ENABLE,
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0);
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if (setup_link_status_change_wq(netdev))
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goto setup_nic_dev_fail;
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/* Register the network device with the OS */
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if (register_netdev(netdev)) {
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dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
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