diff options
| author |   Chris Packham <chris.packham@alliedtelesis.co.nz> | 2020-07-24 11:21:22 +1200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-07-24 20:03:27 -0700 |
| commit | 1baf0fac10fbe3084975d7cb0a4378eb18871482 (patch) | |
| tree | f84edf062292f1ded152fd31dd253ec1ad6098f2 /drivers/net/dsa/mv88e6xxx/global1.c | |
| parent | net: dsa: mv88e6xxx: Support jumbo configuration on 6190/6190X (diff) | |
| download | linux-dev-1baf0fac10fbe3084975d7cb0a4378eb18871482.tar.xz linux-dev-1baf0fac10fbe3084975d7cb0a4378eb18871482.zip | |
net: dsa: mv88e6xxx: Use chip-wide max frame size for MTU
Some of the chips in the mv88e6xxx family don't support jumbo
configuration per port. But they do have a chip-wide max frame size that
can be used. Use this to approximate the behaviour of configuring a port
based MTU.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/mv88e6xxx/global1.c')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/global1.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/global1.c b/drivers/net/dsa/mv88e6xxx/global1.c index ca3a7a7a73c3..f62aa83ca08d 100644 --- a/drivers/net/dsa/mv88e6xxx/global1.c +++ b/drivers/net/dsa/mv88e6xxx/global1.c @@ -196,6 +196,23 @@ int mv88e6185_g1_ppu_disable(struct mv88e6xxx_chip *chip) return mv88e6185_g1_wait_ppu_disabled(chip); } +int mv88e6185_g1_set_max_frame_size(struct mv88e6xxx_chip *chip, int mtu) +{ + u16 val; + int err; + + err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val); + if (err) + return err; + + val &= ~MV88E6185_G1_CTL1_MAX_FRAME_1632; + + if (mtu > 1518) + val |= MV88E6185_G1_CTL1_MAX_FRAME_1632; + + return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val); +} + /* Offset 0x10: IP-PRI Mapping Register 0 * Offset 0x11: IP-PRI Mapping Register 1 * Offset 0x12: IP-PRI Mapping Register 2 |