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Message-ID: <1481129677-10586-3-git-send-email-rvatsavayi@caviumnetworks.com>
Date: Wed, 7 Dec 2016 08:54:32 -0800
From: Raghu Vatsavayi <rvatsavayi@...iumnetworks.com>
To: <davem@...emloft.net>
CC: <netdev@...r.kernel.org>,
Raghu Vatsavayi <rvatsavayi@...iumnetworks.com>,
Raghu Vatsavayi <raghu.vatsavayi@...iumnetworks.com>,
Derek Chickles <derek.chickles@...iumnetworks.com>,
Satanand Burla <satananda.burla@...iumnetworks.com>,
Felix Manlunas <felix.manlunas@...iumnetworks.com>
Subject: [PATCH net-next V3 2/7] liquidio CN23XX: VF link status
Adds support for VF link status related changes.
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@...iumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@...iumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@...iumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@...iumnetworks.com>
---
drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 249 +++++++++++++++++++++
1 file changed, 249 insertions(+)
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index f05a7c3..07e4864 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -163,6 +163,186 @@ static void ifstate_reset(struct lio *lio, int state_flag)
atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag)));
}
+/**
+ * \brief Stop Tx queues
+ * @param netdev network device
+ */
+static void txqs_stop(struct net_device *netdev)
+{
+ if (netif_is_multiqueue(netdev)) {
+ int i;
+
+ for (i = 0; i < netdev->num_tx_queues; i++)
+ netif_stop_subqueue(netdev, i);
+ } else {
+ netif_stop_queue(netdev);
+ }
+}
+
+/**
+ * \brief Start Tx queues
+ * @param netdev network device
+ */
+static void txqs_start(struct net_device *netdev)
+{
+ if (netif_is_multiqueue(netdev)) {
+ int i;
+
+ for (i = 0; i < netdev->num_tx_queues; i++)
+ netif_start_subqueue(netdev, i);
+ } else {
+ netif_start_queue(netdev);
+ }
+}
+
+/**
+ * \brief Wake Tx queues
+ * @param netdev network device
+ */
+static void txqs_wake(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+
+ if (netif_is_multiqueue(netdev)) {
+ int i;
+
+ for (i = 0; i < netdev->num_tx_queues; i++) {
+ int qno = lio->linfo.txpciq[i % (lio->linfo.num_txpciq)]
+ .s.q_no;
+ if (__netif_subqueue_stopped(netdev, i)) {
+ INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
+ tx_restart, 1);
+ netif_wake_subqueue(netdev, i);
+ }
+ }
+ } else {
+ INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
+ tx_restart, 1);
+ netif_wake_queue(netdev);
+ }
+}
+
+/**
+ * \brief Start Tx queue
+ * @param netdev network device
+ */
+static void start_txq(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+
+ if (lio->linfo.link.s.link_up) {
+ txqs_start(netdev);
+ return;
+ }
+}
+
+/**
+ * \brief Print link information
+ * @param netdev network device
+ */
+static void print_link_info(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+
+ if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED) {
+ struct oct_link_info *linfo = &lio->linfo;
+
+ if (linfo->link.s.link_up) {
+ netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
+ linfo->link.s.speed,
+ (linfo->link.s.duplex) ? "Full" : "Half");
+ } else {
+ netif_info(lio, link, lio->netdev, "Link Down\n");
+ }
+ }
+}
+
+/**
+ * \brief Routine to notify MTU change
+ * @param work work_struct data structure
+ */
+static void octnet_link_status_change(struct work_struct *work)
+{
+ struct cavium_wk *wk = (struct cavium_wk *)work;
+ struct lio *lio = (struct lio *)wk->ctxptr;
+
+ rtnl_lock();
+ call_netdevice_notifiers(NETDEV_CHANGEMTU, lio->netdev);
+ rtnl_unlock();
+}
+
+/**
+ * \brief Sets up the mtu status change work
+ * @param netdev network device
+ */
+static int setup_link_status_change_wq(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+ struct octeon_device *oct = lio->oct_dev;
+
+ lio->link_status_wq.wq = alloc_workqueue("link-status",
+ WQ_MEM_RECLAIM, 0);
+ if (!lio->link_status_wq.wq) {
+ dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
+ return -1;
+ }
+ INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
+ octnet_link_status_change);
+ lio->link_status_wq.wk.ctxptr = lio;
+
+ return 0;
+}
+
+static void cleanup_link_status_change_wq(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+
+ if (lio->link_status_wq.wq) {
+ cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
+ destroy_workqueue(lio->link_status_wq.wq);
+ }
+}
+
+/**
+ * \brief Update link status
+ * @param netdev network device
+ * @param ls link status structure
+ *
+ * Called on receipt of a link status response from the core application to
+ * update each interface's link status.
+ */
+static void update_link_status(struct net_device *netdev,
+ union oct_link_status *ls)
+{
+ struct lio *lio = GET_LIO(netdev);
+ struct octeon_device *oct = lio->oct_dev;
+
+ if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
+ lio->linfo.link.u64 = ls->u64;
+
+ print_link_info(netdev);
+ lio->link_changes++;
+
+ if (lio->linfo.link.s.link_up) {
+ netif_carrier_on(netdev);
+ txqs_wake(netdev);
+ } else {
+ netif_carrier_off(netdev);
+ txqs_stop(netdev);
+ }
+
+ if (lio->linfo.link.s.mtu < netdev->mtu) {
+ dev_warn(&oct->pci_dev->dev,
+ "PF has changed the MTU for gmx port. Reducing the mtu from %d to %d\n",
+ netdev->mtu, lio->linfo.link.s.mtu);
+ lio->mtu = lio->linfo.link.s.mtu;
+ netdev->mtu = lio->linfo.link.s.mtu;
+ queue_delayed_work(lio->link_status_wq.wq,
+ &lio->link_status_wq.wk.work, 0);
+ }
+ }
+}
+
static
int liquidio_schedule_msix_droq_pkt_handler(struct octeon_droq *droq, u64 ret)
{
@@ -499,6 +679,8 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
+ cleanup_link_status_change_wq(netdev);
+
free_netdev(netdev);
oct->props[ifidx].gmxport = -1;
@@ -635,6 +817,28 @@ static u16 select_q(struct net_device *dev, struct sk_buff *skb,
}
/**
+ * \brief Net device open for LiquidIO
+ * @param netdev network device
+ */
+static int liquidio_open(struct net_device *netdev)
+{
+ struct lio *lio = GET_LIO(netdev);
+ struct octeon_device *oct = lio->oct_dev;
+
+ ifstate_set(lio, LIO_IFSTATE_RUNNING);
+
+ /* Ready for link status updates */
+ lio->intf_open = 1;
+
+ netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
+ start_txq(netdev);
+
+ dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
+
+ return 0;
+}
+
+/**
* \brief Net device stop for LiquidIO
* @param netdev network device
*/
@@ -653,6 +857,8 @@ static int liquidio_stop(struct net_device *netdev)
ifstate_reset(lio, LIO_IFSTATE_RUNNING);
+ txqs_stop(netdev);
+
dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
return 0;
@@ -758,11 +964,47 @@ static int liquidio_set_features(struct net_device *netdev,
}
static const struct net_device_ops lionetdevops = {
+ .ndo_open = liquidio_open,
+ .ndo_stop = liquidio_stop,
.ndo_fix_features = liquidio_fix_features,
.ndo_set_features = liquidio_set_features,
.ndo_select_queue = select_q,
};
+static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
+{
+ struct octeon_device *oct = (struct octeon_device *)buf;
+ struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
+ union oct_link_status *ls;
+ int gmxport = 0;
+ int i;
+
+ if (recv_pkt->buffer_size[0] != sizeof(*ls)) {
+ dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
+ recv_pkt->buffer_size[0],
+ recv_pkt->rh.r_nic_info.gmxport);
+ goto nic_info_err;
+ }
+
+ gmxport = recv_pkt->rh.r_nic_info.gmxport;
+ ls = (union oct_link_status *)get_rbd(recv_pkt->buffer_ptr[0]);
+
+ octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
+
+ for (i = 0; i < oct->ifcount; i++) {
+ if (oct->props[i].gmxport == gmxport) {
+ update_link_status(oct->props[i].netdev, ls);
+ break;
+ }
+ }
+
+nic_info_err:
+ for (i = 0; i < recv_pkt->buffer_count; i++)
+ recv_buffer_free(recv_pkt->buffer_ptr[i]);
+ octeon_free_recv_info(recv_info);
+ return 0;
+}
+
/**
* \brief Setup network interfaces
* @param octeon_dev octeon device
@@ -788,6 +1030,10 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
ifidx_or_pfnum = octeon_dev->pf_num;
+ /* This is to handle link status changes */
+ octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
+ lio_nic_info, octeon_dev);
+
for (i = 0; i < octeon_dev->ifcount; i++) {
resp_size = sizeof(struct liquidio_if_cfg_resp);
ctx_size = sizeof(struct liquidio_if_cfg_context);
@@ -946,6 +1192,9 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
liquidio_set_feature(netdev, OCTNET_CMD_VERBOSE_ENABLE,
0);
+ if (setup_link_status_change_wq(netdev))
+ goto setup_nic_dev_fail;
+
/* Register the network device with the OS */
if (register_netdev(netdev)) {
dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
--
1.8.3.1
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