• Vivien Didelot's avatar
    net: dsa: support cross-chip ageing time · 64dba236
    Vivien Didelot authored
    Now that the switchdev bridge ageing time attribute is propagated to all
    switch chips of the fabric, each switch can check if the requested value
    is valid and program itself, so that the whole fabric shares a common
    ageing time setting.
    
    This is especially needed for switch chips in between others, containing
    no bridge port members but evidently used in the data path.
    
    To achieve that, remove the condition which skips the other switches. We
    also don't need to identify the target switch anymore, thus remove the
    sw_index member of the dsa_notifier_ageing_time_info notifier structure.
    
    On ZII Dev Rev B (with two 88E6352 and one 88E6185) and ZII Dev Rev C
    (with two 88E6390X), we have the following hardware configuration:
    
        # ip link add name br0 type bridge
        # ip link set master br0 dev lan6
        br0: port 1(lan6) entered blocking state
        br0: port 1(lan6) entered disabled state
        # echo 2000 > /sys/class/net/br0/bridge/ageing_time
    
    Before this patch:
    
        zii-rev-b# cat /sys/kernel/debug/mv88e6xxx/sw*/age_time
        300000
        300000
        15000
    
        zii-rev-c# cat /sys/kernel/debug/mv88e6xxx/sw*/age_time
        300000
        18750
    
    After this patch:
    
        zii-rev-b# cat /sys/kernel/debug/mv88e6xxx/sw*/age_time
        15000
        15000
        15000
    
        zii-rev-c# cat /sys/kernel/debug/mv88e6xxx/sw*/age_time
        18750
        18750
    Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
    Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
    Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    64dba236
switch.c 6.62 KB