[SPARC64]: Simplify VNET probing.

Only probe on the vdc-port VIO devices, create parent
vnet objects on-demand.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 127 insertions, 131 deletions

diff --git a/drivers/net/sunvnet.c b/drivers/net/sunvnet.c
index 8a667c13faef..b69f55226bd6 100644
--- a/drivers/net/sunvnet.c
+++ b/drivers/net/sunvnet.c
@@ -12,6 +12,7 @@
 #include <linux/netdevice.h>
 #include <linux/ethtool.h>
 #include <linux/etherdevice.h>
+#include <linux/mutex.h>
 
 #include <asm/vio.h>
 #include <asm/ldc.h>
@@ -875,6 +876,115 @@ err_out:
         return err;
 }
 
+static LIST_HEAD(vnet_list);
+static DEFINE_MUTEX(vnet_list_mutex);
+
+static struct vnet * __devinit vnet_new(const u64 *local_mac)
+{
+        struct net_device *dev;
+        struct vnet *vp;
+        int err, i;
+
+        dev = alloc_etherdev(sizeof(*vp));
+        if (!dev) {
+                printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
+                return ERR_PTR(-ENOMEM);
+        }
+
+        for (i = 0; i < ETH_ALEN; i++)
+                dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
+
+        memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
+
+        vp = netdev_priv(dev);
+
+        spin_lock_init(&vp->lock);
+        vp->dev = dev;
+
+        INIT_LIST_HEAD(&vp->port_list);
+        for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
+                INIT_HLIST_HEAD(&vp->port_hash[i]);
+        INIT_LIST_HEAD(&vp->list);
+        vp->local_mac = *local_mac;
+
+        dev->open = vnet_open;
+        dev->stop = vnet_close;
+        dev->set_multicast_list = vnet_set_rx_mode;
+        dev->set_mac_address = vnet_set_mac_addr;
+        dev->tx_timeout = vnet_tx_timeout;
+        dev->ethtool_ops = &vnet_ethtool_ops;
+        dev->watchdog_timeo = VNET_TX_TIMEOUT;
+        dev->change_mtu = vnet_change_mtu;
+        dev->hard_start_xmit = vnet_start_xmit;
+
+        err = register_netdev(dev);
+        if (err) {
+                printk(KERN_ERR PFX "Cannot register net device, "
+                       "aborting.\n");
+                goto err_out_free_dev;
+        }
+
+        printk(KERN_INFO "%s: Sun LDOM vnet ", dev->name);
+
+        for (i = 0; i < 6; i++)
+                printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
+
+        list_add(&vp->list, &vnet_list);
+
+        return vp;
+
+err_out_free_dev:
+        free_netdev(dev);
+
+        return ERR_PTR(err);
+}
+
+static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac)
+{
+        struct vnet *iter, *vp;
+
+        mutex_lock(&vnet_list_mutex);
+        vp = NULL;
+        list_for_each_entry(iter, &vnet_list, list) {
+                if (iter->local_mac == *local_mac) {
+                        vp = iter;
+                        break;
+                }
+        }
+        if (!vp)
+                vp = vnet_new(local_mac);
+        mutex_unlock(&vnet_list_mutex);
+
+        return vp;
+}
+
+static const char *local_mac_prop = "local-mac-address";
+
+static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp,
+                                                u64 port_node)
+{
+        const u64 *local_mac = NULL;
+        u64 a;
+
+        mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
+                u64 target = mdesc_arc_target(hp, a);
+                const char *name;
+
+                name = mdesc_get_property(hp, target, "name", NULL);
+                if (!name || strcmp(name, "network"))
+                        continue;
+
+                local_mac = mdesc_get_property(hp, target,
+                                               local_mac_prop, NULL);
+                if (local_mac)
+                        break;
+        }
+        if (!local_mac)
+                return ERR_PTR(-ENODEV);
+
+        return vnet_find_or_create(local_mac);
+}
+
 static struct ldc_channel_config vnet_ldc_cfg = {
         .event          = vnet_event,
         .mtu            = 64,
@@ -887,6 +997,14 @@ static struct vio_driver_ops vnet_vio_ops = {
         .handshake_complete     = vnet_handshake_complete,
 };
 
+static void print_version(void)
+{
+        static int version_printed;
+
+        if (version_printed++ == 0)
+                printk(KERN_INFO "%s", version);
+}
+
 const char *remote_macaddr_prop = "remote-mac-address";
 
 static int __devinit vnet_port_probe(struct vio_dev *vdev,
@@ -899,14 +1017,17 @@ static int __devinit vnet_port_probe(struct vio_dev *vdev,
         const u64 *rmac;
         int len, i, err, switch_port;
 
-        vp = dev_get_drvdata(vdev->dev.parent);
-        if (!vp) {
-                printk(KERN_ERR PFX "Cannot find port parent vnet.\n");
-                return -ENODEV;
-        }
+        print_version();
 
         hp = mdesc_grab();
 
+        vp = vnet_find_parent(hp, vdev->mp);
+        if (IS_ERR(vp)) {
+                printk(KERN_ERR PFX "Cannot find port parent vnet.\n");
+                err = PTR_ERR(vp);
+                goto err_out_put_mdesc;
+        }
+
         rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
         err = -ENODEV;
         if (!rmac) {
@@ -1025,139 +1146,14 @@ static struct vio_driver vnet_port_driver = {
         }
 };
 
-const char *local_mac_prop = "local-mac-address";
-
-static int __devinit vnet_probe(struct vio_dev *vdev,
-                                const struct vio_device_id *id)
-{
-        static int vnet_version_printed;
-        struct mdesc_handle *hp;
-        struct net_device *dev;
-        struct vnet *vp;
-        const u64 *mac;
-        int err, i, len;
-
-        if (vnet_version_printed++ == 0)
-                printk(KERN_INFO "%s", version);
-
-        hp = mdesc_grab();
-
-        mac = mdesc_get_property(hp, vdev->mp, local_mac_prop, &len);
-        if (!mac) {
-                printk(KERN_ERR PFX "vnet lacks %s property.\n",
-                       local_mac_prop);
-                err = -ENODEV;
-                goto err_out;
-        }
-
-        dev = alloc_etherdev(sizeof(*vp));
-        if (!dev) {
-                printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
-                err = -ENOMEM;
-                goto err_out;
-        }
-
-        for (i = 0; i < ETH_ALEN; i++)
-                dev->dev_addr[i] = (*mac >> (5 - i) * 8) & 0xff;
-
-        memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
-
-        SET_NETDEV_DEV(dev, &vdev->dev);
-
-        vp = netdev_priv(dev);
-
-        spin_lock_init(&vp->lock);
-        vp->dev = dev;
-        vp->vdev = vdev;
-
-        INIT_LIST_HEAD(&vp->port_list);
-        for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
-                INIT_HLIST_HEAD(&vp->port_hash[i]);
-
-        dev->open = vnet_open;
-        dev->stop = vnet_close;
-        dev->set_multicast_list = vnet_set_rx_mode;
-        dev->set_mac_address = vnet_set_mac_addr;
-        dev->tx_timeout = vnet_tx_timeout;
-        dev->ethtool_ops = &vnet_ethtool_ops;
-        dev->watchdog_timeo = VNET_TX_TIMEOUT;
-        dev->change_mtu = vnet_change_mtu;
-        dev->hard_start_xmit = vnet_start_xmit;
-
-        err = register_netdev(dev);
-        if (err) {
-                printk(KERN_ERR PFX "Cannot register net device, "
-                       "aborting.\n");
-                goto err_out_free_dev;
-        }
-
-        printk(KERN_INFO "%s: Sun LDOM vnet ", dev->name);
-
-        for (i = 0; i < 6; i++)
-                printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
-
-        dev_set_drvdata(&vdev->dev, vp);
-
-        mdesc_release(hp);
-
-        return 0;
-
-err_out_free_dev:
-        free_netdev(dev);
-
-err_out:
-        mdesc_release(hp);
-        return err;
-}
-
-static int vnet_remove(struct vio_dev *vdev)
-{
-
-        struct vnet *vp = dev_get_drvdata(&vdev->dev);
-
-        if (vp) {
-                /* XXX unregister port, or at least check XXX */
-                unregister_netdevice(vp->dev);
-                dev_set_drvdata(&vdev->dev, NULL);
-        }
-        return 0;
-}
-
-static struct vio_device_id vnet_match[] = {
-        {
-                .type = "network",
-        },
-        {},
-};
-MODULE_DEVICE_TABLE(vio, vnet_match);
-
-static struct vio_driver vnet_driver = {
-        .id_table       = vnet_match,
-        .probe          = vnet_probe,
-        .remove         = vnet_remove,
-        .driver         = {
-                .name   = "vnet",
-                .owner  = THIS_MODULE,
-        }
-};
-
 static int __init vnet_init(void)
 {
-        int err = vio_register_driver(&vnet_driver);
-
-        if (!err) {
-                err = vio_register_driver(&vnet_port_driver);
-                if (err)
-                        vio_unregister_driver(&vnet_driver);
-        }
-
-        return err;
+        return vio_register_driver(&vnet_port_driver);
 }
 
 static void __exit vnet_exit(void)
 {
         vio_unregister_driver(&vnet_port_driver);
-        vio_unregister_driver(&vnet_driver);
 }
 
 module_init(vnet_init);