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net: dsa: mv88e6xxx: rework jumbo size operation

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Marvell chips have a Jumbo Mode to set the maximum frame size (MTU).

The mv88e6xxx_ops structure is meant to contain generic functionalities,
no driver logic. Change port_jumbo_config to port_set_jumbo_size setting
the mode from a given maximum size value.

There is no functional changes since we still use 10240 bytes.

At the same time, correctly clear all Jumbo Mode bits before writing.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot
2017-06-08 18:34:13 -04:00
committed by David S. Miller
parent 0898432cc2
commit cd782656da
4 changed files with 36 additions and 23 deletions
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14
drivers/net/dsa/mv88e6xxx/port.c
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@@ -816,7 +816,8 @@ int mv88e6xxx_port_set_map_da(struct mv88e6xxx_chip *chip, int port)
return mv88e6xxx_port_write(chip, port, PORT_CONTROL_2, reg);
}
int mv88e6165_port_jumbo_config(struct mv88e6xxx_chip *chip, int port)
int mv88e6165_port_set_jumbo_size(struct mv88e6xxx_chip *chip, int port,
size_t size)
{
u16 reg;
int err;
@@ -825,7 +826,16 @@ int mv88e6165_port_jumbo_config(struct mv88e6xxx_chip *chip, int port)
if (err)
return err;
reg |= PORT_CONTROL_2_JUMBO_10240;
reg &= ~PORT_CONTROL_2_JUMBO_MASK;
if (size <= 1522)
reg |= PORT_CONTROL_2_JUMBO_1522;
else if (size <= 2048)
reg |= PORT_CONTROL_2_JUMBO_2048;
else if (size <= 10240)
reg |= PORT_CONTROL_2_JUMBO_10240;
else
return -ERANGE;
return mv88e6xxx_port_write(chip, port, PORT_CONTROL_2, reg);
}