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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-01-07 03:24:02 +0200
committerJakub Kicinski <kuba@kernel.org>2021-01-07 15:42:07 -0800
commit1593cd40d785387bf360aa85838d6f9d348a7cbc (patch)
treeeb48a405fee91d9ecd336f70d1eb361f1b008dec
parenta5e3c9ba9258dbe55cba0cc3804675c9f1eaa169 (diff)
net: systemport: use standard netdevice notifier to detect DSA presence
The SYSTEMPORT driver maps each port of the embedded Broadcom DSA switch port to a certain queue of the master Ethernet controller. For that it currently uses a dedicated notifier infrastructure which was added in commit 60724d4bae14 ("net: dsa: Add support for DSA specific notifiers"). However, since commit 2f1e8ea726e9 ("net: dsa: link interfaces with the DSA master to get rid of lockdep warnings"), DSA is actually an upper of the Broadcom SYSTEMPORT as far as the netdevice adjacency lists are concerned. So naturally, the plain NETDEV_CHANGEUPPER net device notifiers are emitted. It looks like there is enough API exposed by DSA to the outside world already to make the call_dsa_notifiers API redundant. So let's convert its only user to plain netdev notifiers. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--drivers/net/ethernet/broadcom/bcmsysport.c81
-rw-r--r--drivers/net/ethernet/broadcom/bcmsysport.h2
2 files changed, 37 insertions, 46 deletions
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 9ef743d6ba67..a8b20441ca7c 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2311,33 +2311,22 @@ static const struct net_device_ops bcm_sysport_netdev_ops = {
.ndo_select_queue = bcm_sysport_select_queue,
};
-static int bcm_sysport_map_queues(struct notifier_block *nb,
- struct dsa_notifier_register_info *info)
+static int bcm_sysport_map_queues(struct net_device *dev,
+ struct net_device *slave_dev)
{
+ struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
+ struct bcm_sysport_priv *priv = netdev_priv(dev);
struct bcm_sysport_tx_ring *ring;
- struct bcm_sysport_priv *priv;
- struct net_device *slave_dev;
unsigned int num_tx_queues;
unsigned int q, qp, port;
- struct net_device *dev;
-
- priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
- if (priv->netdev != info->master)
- return 0;
-
- dev = info->master;
/* We can't be setting up queue inspection for non directly attached
* switches
*/
- if (info->switch_number)
+ if (dp->ds->index)
return 0;
- if (dev->netdev_ops != &bcm_sysport_netdev_ops)
- return 0;
-
- port = info->port_number;
- slave_dev = info->info.dev;
+ port = dp->index;
/* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
* 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
@@ -2377,27 +2366,16 @@ static int bcm_sysport_map_queues(struct notifier_block *nb,
return 0;
}
-static int bcm_sysport_unmap_queues(struct notifier_block *nb,
- struct dsa_notifier_register_info *info)
+static int bcm_sysport_unmap_queues(struct net_device *dev,
+ struct net_device *slave_dev)
{
+ struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
+ struct bcm_sysport_priv *priv = netdev_priv(dev);
struct bcm_sysport_tx_ring *ring;
- struct bcm_sysport_priv *priv;
- struct net_device *slave_dev;
unsigned int num_tx_queues;
- struct net_device *dev;
unsigned int q, qp, port;
- priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
- if (priv->netdev != info->master)
- return 0;
-
- dev = info->master;
-
- if (dev->netdev_ops != &bcm_sysport_netdev_ops)
- return 0;
-
- port = info->port_number;
- slave_dev = info->info.dev;
+ port = dp->index;
num_tx_queues = slave_dev->real_num_tx_queues;
@@ -2418,17 +2396,30 @@ static int bcm_sysport_unmap_queues(struct notifier_block *nb,
return 0;
}
-static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
- unsigned long event, void *ptr)
+static int bcm_sysport_netdevice_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
{
- int ret = NOTIFY_DONE;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct netdev_notifier_changeupper_info *info = ptr;
+ struct bcm_sysport_priv *priv;
+ int ret = 0;
+
+ priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
+ if (priv->netdev != dev)
+ return NOTIFY_DONE;
switch (event) {
- case DSA_PORT_REGISTER:
- ret = bcm_sysport_map_queues(nb, ptr);
- break;
- case DSA_PORT_UNREGISTER:
- ret = bcm_sysport_unmap_queues(nb, ptr);
+ case NETDEV_CHANGEUPPER:
+ if (dev->netdev_ops != &bcm_sysport_netdev_ops)
+ return NOTIFY_DONE;
+
+ if (!dsa_slave_dev_check(info->upper_dev))
+ return NOTIFY_DONE;
+
+ if (info->linking)
+ ret = bcm_sysport_map_queues(dev, info->upper_dev);
+ else
+ ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
break;
}
@@ -2601,9 +2592,9 @@ static int bcm_sysport_probe(struct platform_device *pdev)
priv->rx_max_coalesced_frames = 1;
u64_stats_init(&priv->syncp);
- priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
+ priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
- ret = register_dsa_notifier(&priv->dsa_notifier);
+ ret = register_netdevice_notifier(&priv->netdev_notifier);
if (ret) {
dev_err(&pdev->dev, "failed to register DSA notifier\n");
goto err_deregister_fixed_link;
@@ -2630,7 +2621,7 @@ static int bcm_sysport_probe(struct platform_device *pdev)
return 0;
err_deregister_notifier:
- unregister_dsa_notifier(&priv->dsa_notifier);
+ unregister_netdevice_notifier(&priv->netdev_notifier);
err_deregister_fixed_link:
if (of_phy_is_fixed_link(dn))
of_phy_deregister_fixed_link(dn);
@@ -2648,7 +2639,7 @@ static int bcm_sysport_remove(struct platform_device *pdev)
/* Not much to do, ndo_close has been called
* and we use managed allocations
*/
- unregister_dsa_notifier(&priv->dsa_notifier);
+ unregister_netdevice_notifier(&priv->netdev_notifier);
unregister_netdev(dev);
if (of_phy_is_fixed_link(dn))
of_phy_deregister_fixed_link(dn);
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.h b/drivers/net/ethernet/broadcom/bcmsysport.h
index 3a5cb6f128f5..fefd3ccf0379 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.h
+++ b/drivers/net/ethernet/broadcom/bcmsysport.h
@@ -787,7 +787,7 @@ struct bcm_sysport_priv {
struct u64_stats_sync syncp;
/* map information between switch port queues and local queues */
- struct notifier_block dsa_notifier;
+ struct notifier_block netdev_notifier;
unsigned int per_port_num_tx_queues;
struct bcm_sysport_tx_ring *ring_map[DSA_MAX_PORTS * 8];