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| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2022-12-05 08:22:30 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-12-07 13:57:58 +0300 |
| commit | 29d1e85f45e03c9fd1b8985f983f33c021e130c8 (patch) | |
| tree | e4f31b4ba722611b104da68357916df154068a44 /drivers/net/dsa/microchip/ksz_common.h | |
| parent | 6f1b986a43ce9aa67b11a7e54ac75530705d04e7 (diff) | |
| download | linux-29d1e85f45e03c9fd1b8985f983f33c021e130c8.tar.xz | |
net: dsa: microchip: ksz8: add MTU configuration support
Make MTU configurable on KSZ87xx and KSZ88xx series of switches.
Before this patch, pre-configured behavior was different on different
switch series, due to opposite meaning of the same bit:
- KSZ87xx: Reg 4, Bit 1 - if 1, max frame size is 1532; if 0 - 1514
- KSZ88xx: Reg 4, Bit 1 - if 1, max frame size is 1514; if 0 - 1532
Since the code was telling "... SW_LEGAL_PACKET_DISABLE, true)", I
assume, the idea was to set max frame size to 1532.
With this patch, by setting MTU size 1500, both switch series will be
configured to the 1532 frame limit.
This patch was tested on KSZ8873.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/dsa/microchip/ksz_common.h')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index 5f404a444ce1..cb27f5a180c7 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -591,6 +591,10 @@ static inline int is_lan937x(struct ksz_device *dev) #define PORT_SRC_PHY_INT 1 +#define KSZ8795_HUGE_PACKET_SIZE 2000 +#define KSZ8863_HUGE_PACKET_SIZE 1916 +#define KSZ8863_NORMAL_PACKET_SIZE 1536 +#define KSZ8_LEGAL_PACKET_SIZE 1518 #define KSZ9477_MAX_FRAME_SIZE 9000 /* Regmap tables generation */ |