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net: ti: icssg-prueth: Add Multicast Filtering support for VLAN in MAC mode

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Add multicast filtering support for VLAN interfaces in dual EMAC mode
for ICSSG driver.

The driver uses vlan_for_each() API to get the list of available
vlans. The driver then sync mc addr of vlan interface with a locally
mainatined list emac->vlan_mcast_list[vid] using __hw_addr_sync_multiple()
API.

__hw_addr_sync_multiple() is used instead of __hw_addr_sync() to sync
vdev->mc with local list because the sync_cnt for addresses in vdev->mc
will already be set by the vlan_dev_set_rx_mode() [net/8021q/vlan_dev.c]
and __hw_addr_sync() only syncs when the sync_cnt == 0. Whereas
__hw_addr_sync_multiple() can sync addresses even if sync_cnt is not 0.
Export __hw_addr_sync_multiple() so that driver can use it.

Once the local list is synced, driver calls __hw_addr_sync_dev() with
the local list, vdev, sync and unsync callbacks.

__hw_addr_sync_dev() is used with the local maintained list as the list
to synchronize instead of using __dev_mc_sync() on vdev because
__dev_mc_sync() on vdev will call __hw_addr_sync_dev() on vdev->mc and
sync_cnt for addresses in vdev->mc will already be set by the
vlan_dev_set_rx_mode() [net/8021q/vlan_dev.c] and __hw_addr_sync_dev()
only syncs if the sync_cnt of addresses in the list (vdev->mc in this case)
is 0. Whereas __hw_addr_sync_dev() on local list will work fine as the
sync_cnt for addresses in the local list will still be 0.

Based on change in addresses in the local list, sync / unsync callbacks
are invoked. In the sync / unsync API in driver, based on whether the ndev
is vlan or not, driver passes appropriate vid to FDB helper functions.

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
MD Danish Anwar 2025-01-10 13:58:50 +05:30 committed by Paolo Abeni
parent 816b02e63a
commit 04508d20b0
4 changed files with 66 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
drivers/net/ethernet/ti/icssg/icssg_prueth.c
View File

@ -561,30 +561,44 @@ const struct icss_iep_clockops prueth_iep_clockops = {
static int icssg_prueth_add_mcast(struct net_device *ndev, const u8 *addr)
{
struct prueth_emac *emac = netdev_priv(ndev);
int port_mask = BIT(emac->port_id);
struct net_device *real_dev;
struct prueth_emac *emac;
int port_mask;
u8 vlan_id;
port_mask |= icssg_fdb_lookup(emac, addr, 0);
icssg_fdb_add_del(emac, addr, 0, port_mask, true);
icssg_vtbl_modify(emac, 0, port_mask, port_mask, true);
vlan_id = is_vlan_dev(ndev) ? vlan_dev_vlan_id(ndev) : PRUETH_DFLT_VLAN_MAC;
real_dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
emac = netdev_priv(real_dev);
port_mask = BIT(emac->port_id) | icssg_fdb_lookup(emac, addr, vlan_id);
icssg_fdb_add_del(emac, addr, vlan_id, port_mask, true);
icssg_vtbl_modify(emac, vlan_id, port_mask, port_mask, true);
return 0;
}
static int icssg_prueth_del_mcast(struct net_device *ndev, const u8 *addr)
{
struct prueth_emac *emac = netdev_priv(ndev);
int port_mask = BIT(emac->port_id);
struct net_device *real_dev;
struct prueth_emac *emac;
int other_port_mask;
int port_mask;
u8 vlan_id;
other_port_mask = port_mask ^ icssg_fdb_lookup(emac, addr, 0);
vlan_id = is_vlan_dev(ndev) ? vlan_dev_vlan_id(ndev) : PRUETH_DFLT_VLAN_MAC;
real_dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
emac = netdev_priv(real_dev);
icssg_fdb_add_del(emac, addr, 0, port_mask, false);
icssg_vtbl_modify(emac, 0, port_mask, port_mask, false);
port_mask = BIT(emac->port_id);
other_port_mask = port_mask ^ icssg_fdb_lookup(emac, addr, vlan_id);
icssg_fdb_add_del(emac, addr, vlan_id, port_mask, false);
icssg_vtbl_modify(emac, vlan_id, port_mask, port_mask, false);
if (other_port_mask) {
icssg_fdb_add_del(emac, addr, 0, other_port_mask, true);
icssg_vtbl_modify(emac, 0, other_port_mask, other_port_mask, true);
icssg_fdb_add_del(emac, addr, vlan_id, other_port_mask, true);
icssg_vtbl_modify(emac, vlan_id, other_port_mask,
other_port_mask, true);
}
return 0;
@ -620,6 +634,25 @@ static int icssg_prueth_hsr_del_mcast(struct net_device *ndev, const u8 *addr)
return 0;
}
static int icssg_update_vlan_mcast(struct net_device *vdev, int vid,
void *args)
{
struct prueth_emac *emac = args;
if (!vdev || !vid)
return 0;
netif_addr_lock_bh(vdev);
__hw_addr_sync_multiple(&emac->vlan_mcast_list[vid], &vdev->mc,
vdev->addr_len);
netif_addr_unlock_bh(vdev);
__hw_addr_sync_dev(&emac->vlan_mcast_list[vid], vdev,
icssg_prueth_add_mcast, icssg_prueth_del_mcast);
return 0;
}
/**
* emac_ndo_open - EMAC device open
* @ndev: network adapter device
@ -857,12 +890,17 @@ static void emac_ndo_set_rx_mode_work(struct work_struct *work)
return;
}
if (emac->prueth->is_hsr_offload_mode)
if (emac->prueth->is_hsr_offload_mode) {
__dev_mc_sync(ndev, icssg_prueth_hsr_add_mcast,
icssg_prueth_hsr_del_mcast);
else
} else {
__dev_mc_sync(ndev, icssg_prueth_add_mcast,
icssg_prueth_del_mcast);
if (rtnl_trylock()) {
vlan_for_each(ndev, icssg_update_vlan_mcast, emac);
rtnl_unlock();
}
}
}
/**
@ -913,6 +951,7 @@ static int emac_ndo_vlan_rx_add_vid(struct net_device *ndev,
if (prueth->is_hsr_offload_mode)
port_mask |= BIT(PRUETH_PORT_HOST);
__hw_addr_init(&emac->vlan_mcast_list[vid]);
netdev_dbg(emac->ndev, "VID add vid:%u port_mask:%X untag_mask %X\n",
vid, port_mask, untag_mask);

6
drivers/net/ethernet/ti/icssg/icssg_prueth.h
View File

@ -83,6 +83,10 @@
#define ICSS_CMD_ADD_FILTER 0x7
#define ICSS_CMD_ADD_MAC 0x8
/* VLAN Filtering Related MACROs */
#define PRUETH_DFLT_VLAN_MAC 0
#define MAX_VLAN_ID 256
/* In switch mode there are 3 real ports i.e. 3 mac addrs.
* however Linux sees only the host side port. The other 2 ports
* are the switch ports.
@ -200,6 +204,8 @@ struct prueth_emac {
/* RX IRQ Coalescing Related */
struct hrtimer rx_hrtimer;
unsigned long rx_pace_timeout_ns;
struct netdev_hw_addr_list vlan_mcast_list[MAX_VLAN_ID];
};
/**

3
include/linux/netdevice.h
View File

@ -4687,6 +4687,9 @@ int devm_register_netdev(struct device *dev, struct net_device *ndev);
/* General hardware address lists handling functions */
int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list, int addr_len);
int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list,
int addr_len);
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list, int addr_len);
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,

7
net/core/dev_addr_lists.c
View File

@ -242,9 +242,9 @@ static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list,
__hw_addr_del_entry(from_list, ha, false, false);
}
static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list,
int addr_len)
int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list,
int addr_len)
{
int err = 0;
struct netdev_hw_addr *ha, *tmp;
@ -260,6 +260,7 @@ static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
}
return err;
}
EXPORT_SYMBOL(__hw_addr_sync_multiple);
/* This function only works where there is a strict 1-1 relationship
* between source and destination of they synch. If you ever need to