RDMA/ocrdma: Fixed GID table for vlan and events

1. Fix reporting GID table addition events.
2. Enable vlan based GID entries only when VLAN is enabled at compile
   time (test CONFIG_VLAN_8021Q / CONFIG_VLAN_8021Q_MODULE).

Signed-off-by: Parav Pandit <parav.pandit@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index 04fef3de6d75f618a990d7e76730311a24827b68..b050e629e9c3bd19d2e089fdd7792a53d49fe2b0 100644 (file)
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -97,13 +97,11 @@ static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char *mac_addr,
        sgid->raw[15] = mac_addr[5];
 }
 
-static void ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
+static bool ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
                            bool is_vlan, u16 vlan_id)
 {
        int i;
-       bool found = false;
        union ib_gid new_sgid;
-       int free_idx = OCRDMA_MAX_SGID;
        unsigned long flags;
 
        memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
@@ -115,23 +113,19 @@ static void ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
                if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
                            sizeof(union ib_gid))) {
                        /* found free entry */
-                       if (!found) {
-                               free_idx = i;
-                               found = true;
-                               break;
-                       }
+                       memcpy(&dev->sgid_tbl[i], &new_sgid,
+                              sizeof(union ib_gid));
+                       spin_unlock_irqrestore(&dev->sgid_lock, flags);
+                       return true;
                } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
                                   sizeof(union ib_gid))) {
                        /* entry already present, no addition is required. */
                        spin_unlock_irqrestore(&dev->sgid_lock, flags);
-                       return;
+                       return false;
                }
        }
-       /* if entry doesn't exist and if table has some space, add entry */
-       if (found)
-               memcpy(&dev->sgid_tbl[free_idx], &new_sgid,
-                      sizeof(union ib_gid));
        spin_unlock_irqrestore(&dev->sgid_lock, flags);
+       return false;
 }
 
 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
@@ -167,7 +161,8 @@ static void ocrdma_add_default_sgid(struct ocrdma_dev *dev)
        ocrdma_get_guid(dev, &sgid->raw[8]);
 }
 
-static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
 {
        struct net_device *netdev, *tmp;
        u16 vlan_id;
@@ -175,8 +170,6 @@ static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
 
        netdev = dev->nic_info.netdev;
 
-       ocrdma_add_default_sgid(dev);
-
        rcu_read_lock();
        for_each_netdev_rcu(&init_net, tmp) {
                if (netdev == tmp || vlan_dev_real_dev(tmp) == netdev) {
@@ -194,10 +187,23 @@ static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
                }
        }
        rcu_read_unlock();
+}
+#else
+static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
+{
+
+}
+#endif /* VLAN */
+
+static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
+{
+       ocrdma_add_default_sgid(dev);
+       ocrdma_add_vlan_sgids(dev);
        return 0;
 }
 
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) || \
+defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 
 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
                                  unsigned long event, void *ptr)
@@ -208,6 +214,7 @@ static int ocrdma_inet6addr_event(struct notifier_block *notifier,
        struct ib_event gid_event;
        struct ocrdma_dev *dev;
        bool found = false;
+       bool updated = false;
        bool is_vlan = false;
        u16 vid = 0;
 
@@ -233,23 +240,21 @@ static int ocrdma_inet6addr_event(struct notifier_block *notifier,
        mutex_lock(&dev->dev_lock);
        switch (event) {
        case NETDEV_UP:
-               ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
+               updated = ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
                break;
        case NETDEV_DOWN:
-               found = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
-               if (found) {
-                       /* found the matching entry, notify
-                        * the consumers about it
-                        */
-                       gid_event.device = &dev->ibdev;
-                       gid_event.element.port_num = 1;
-                       gid_event.event = IB_EVENT_GID_CHANGE;
-                       ib_dispatch_event(&gid_event);
-               }
+               updated = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
                break;
        default:
                break;
        }
+       if (updated) {
+               /* GID table updated, notify the consumers about it */
+               gid_event.device = &dev->ibdev;
+               gid_event.element.port_num = 1;
+               gid_event.event = IB_EVENT_GID_CHANGE;
+               ib_dispatch_event(&gid_event);
+       }
        mutex_unlock(&dev->dev_lock);
        return NOTIFY_OK;
 }
@@ -258,7 +263,7 @@ static struct notifier_block ocrdma_inet6addr_notifier = {
        .notifier_call = ocrdma_inet6addr_event
 };
 
-#endif /* IPV6 */
+#endif /* IPV6 and VLAN */
 
 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
                                              u8 port_num)