liquidio: link and control commands

This patch adds work queue support for link status and
control commands.

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: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c
index 809179c..5fb444d 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_core.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c
@@ -156,10 +156,9 @@ void liquidio_link_ctrl_cmd_completion(void *nctrl_ptr)
                dev_info(&oct->pci_dev->dev, "%s MTU Changed from %d to %d\n",
                         netdev->name, netdev->mtu,
                         nctrl->ncmd.s.param1);
-               rtnl_lock();
                netdev->mtu = nctrl->ncmd.s.param1;
-               call_netdevice_notifiers(NETDEV_CHANGEMTU, netdev);
-               rtnl_unlock();
+               queue_delayed_work(lio->link_status_wq.wq,
+                                  &lio->link_status_wq.wk.work, 0);
                break;
 
        case OCTNET_CMD_GPIO_ACCESS:

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 866c075..9bc5e23 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -856,6 +856,52 @@ static void print_link_info(struct net_device *netdev)
        }
 }
 
+/**
+ * \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 inline 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 inline 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
@@ -1385,11 +1431,16 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
                        napi_disable(napi);
 
                oct->props[lio->ifidx].napi_enabled = 0;
+
+               if (OCTEON_CN23XX_PF(oct))
+                       oct->droq[0]->ops.poll_mode = 0;
        }
 
        if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
                unregister_netdev(netdev);
 
+       cleanup_link_status_change_wq(netdev);
+
        delete_glists(lio);
 
        free_netdev(netdev);
@@ -2267,6 +2318,14 @@ static inline int setup_io_queues(struct octeon_device *octeon_dev,
                octeon_register_droq_ops(octeon_dev, q_no, &droq_ops);
        }
 
+       if (OCTEON_CN23XX_PF(octeon_dev)) {
+               /* 23XX PF can receive control messages (via the first PF-owned
+                * droq) from the firmware even if the ethX interface is down,
+                * so that's why poll_mode must be off for the first droq.
+                */
+               octeon_dev->droq[0]->ops.poll_mode = 0;
+       }
+
        /* set up IQs. */
        for (q = 0; q < lio->linfo.num_txpciq; q++) {
                num_tx_descs = CFG_GET_NUM_TX_DESCS_NIC_IF(octeon_get_conf
@@ -2351,12 +2410,20 @@ static int liquidio_open(struct net_device *netdev)
                        napi_enable(napi);
 
                oct->props[lio->ifidx].napi_enabled = 1;
+
+               if (OCTEON_CN23XX_PF(oct))
+                       oct->droq[0]->ops.poll_mode = 1;
        }
 
        oct_ptp_open(netdev);
 
        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");
+
        if (OCTEON_CN23XX_PF(oct)) {
                if (!oct->msix_on)
                        if (setup_tx_poll_fn(netdev))
@@ -2368,14 +2435,9 @@ static int liquidio_open(struct net_device *netdev)
 
        start_txq(netdev);
 
-       netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
-
        /* tell Octeon to start forwarding packets to host */
        send_rx_ctrl_cmd(lio, 1);
 
-       /* Ready for link status updates */
-       lio->intf_open = 1;
-
        dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
                 netdev->name);
 
@@ -3668,6 +3730,9 @@ 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");

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_network.h b/drivers/net/ethernet/cavium/liquidio/octeon_network.h
index 7cfbdf9..d3b68d8 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/octeon_network.h
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_network.h
@@ -122,6 +122,10 @@ struct lio {
 
        /* work queue for  txq status */
        struct cavium_wq        txq_status_wq;
+
+       /* work queue for  link status */
+       struct cavium_wq        link_status_wq;
+
 };
 
 #define LIO_SIZE         (sizeof(struct lio))