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net: dsa: mv88e6xxx: Preserve priority when setting CPU port.

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[ Upstream commit d8dc2c9676e614ef62f54a155b50076888c8a29a ]

The 6390 family uses an extended register to set the port connected to
the CPU. The lower 5 bits indicate the port, the upper three bits are
the priority of the frames as they pass through the switch, what
egress queue they should use, etc. Since frames being set to the CPU
are typically management frames, BPDU, IGMP, ARP, etc set the priority
to 7, the reset default, and the highest.

Fixes: 33641994a676 ("net: dsa: mv88e6xxx: Monitor and Management tables")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrew Lunn
2020-01-04 23:14:51 +01:00
committed by Greg Kroah-Hartman
parent 74165c1ca3
commit d9ffa1062a
2 changed files with 6 additions and 0 deletions
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5
drivers/net/dsa/mv88e6xxx/global1.c
View File

@ -332,6 +332,11 @@ int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port)
{
u16 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST;
/* Use the default high priority for management frames sent to
* the CPU.
*/
port |= MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST_MGMTPRI;
return mv88e6390_g1_monitor_write(chip, ptr, port);
}

1
drivers/net/dsa/mv88e6xxx/global1.h
View File

@ -210,6 +210,7 @@
#define MV88E6390_G1_MONITOR_MGMT_CTL_PTR_INGRESS_DEST 0x2000
#define MV88E6390_G1_MONITOR_MGMT_CTL_PTR_EGRESS_DEST 0x2100
#define MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST 0x3000
#define MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST_MGMTPRI 0x00e0
#define MV88E6390_G1_MONITOR_MGMT_CTL_DATA_MASK 0x00ff
/* Offset 0x1C: Global Control 2 */