From 77a58c741df1b91258cc4df3e6893ff61e8293a4 Mon Sep 17 00:00:00 2001 From: Scott Feldman Date: Wed, 8 Jul 2015 16:06:47 -0700 Subject: [PATCH] rocker: add change MTU support Implement ndo_change_mtu: on MTU change, reallocate Rx ring bufs and signal HW of new port MTU value. Signed-off-by: Scott Feldman Reviewed-by: Simon Horman Tested-by: Simon Horman Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- drivers/net/ethernet/rocker/rocker.c | 61 ++++++++++++++++++++++++++++ drivers/net/ethernet/rocker/rocker.h | 1 + 2 files changed, 62 insertions(+) diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c index 2d8578cade03..c0051673c9fa 100644 --- a/drivers/net/ethernet/rocker/rocker.c +++ b/drivers/net/ethernet/rocker/rocker.c @@ -1817,6 +1817,30 @@ rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port, return 0; } +static int +rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port, + struct rocker_desc_info *desc_info, + void *priv) +{ + int mtu = *(int *)priv; + struct rocker_tlv *cmd_info; + + if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE, + ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS)) + return -EMSGSIZE; + cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO); + if (!cmd_info) + return -EMSGSIZE; + if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT, + rocker_port->pport)) + return -EMSGSIZE; + if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU, + mtu)) + return -EMSGSIZE; + rocker_tlv_nest_end(desc_info, cmd_info); + return 0; +} + static int rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port, struct rocker_desc_info *desc_info, @@ -1874,6 +1898,14 @@ static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port, macaddr, NULL, NULL); } +static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port, + int mtu) +{ + return rocker_cmd_exec(rocker_port, SWITCHDEV_TRANS_NONE, 0, + rocker_cmd_set_port_settings_mtu_prep, + &mtu, NULL, NULL); +} + static int rocker_port_set_learning(struct rocker_port *rocker_port, enum switchdev_trans trans) { @@ -4152,6 +4184,34 @@ static int rocker_port_set_mac_address(struct net_device *dev, void *p) return 0; } +static int rocker_port_change_mtu(struct net_device *dev, int new_mtu) +{ + struct rocker_port *rocker_port = netdev_priv(dev); + int running = netif_running(dev); + int err; + +#define ROCKER_PORT_MIN_MTU 68 +#define ROCKER_PORT_MAX_MTU 9000 + + if (new_mtu < ROCKER_PORT_MIN_MTU || new_mtu > ROCKER_PORT_MAX_MTU) + return -EINVAL; + + if (running) + rocker_port_stop(dev); + + netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu); + dev->mtu = new_mtu; + + err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu); + if (err) + return err; + + if (running) + err = rocker_port_open(dev); + + return err; +} + static int rocker_port_get_phys_port_name(struct net_device *dev, char *buf, size_t len) { @@ -4172,6 +4232,7 @@ static const struct net_device_ops rocker_port_netdev_ops = { .ndo_stop = rocker_port_stop, .ndo_start_xmit = rocker_port_xmit, .ndo_set_mac_address = rocker_port_set_mac_address, + .ndo_change_mtu = rocker_port_change_mtu, .ndo_bridge_getlink = switchdev_port_bridge_getlink, .ndo_bridge_setlink = switchdev_port_bridge_setlink, .ndo_bridge_dellink = switchdev_port_bridge_dellink, diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h index c61fbf968036..08b2c3d96188 100644 --- a/drivers/net/ethernet/rocker/rocker.h +++ b/drivers/net/ethernet/rocker/rocker.h @@ -159,6 +159,7 @@ enum { ROCKER_TLV_CMD_PORT_SETTINGS_MODE, /* u8 */ ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING, /* u8 */ ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME, /* binary */ + ROCKER_TLV_CMD_PORT_SETTINGS_MTU, /* u16 */ __ROCKER_TLV_CMD_PORT_SETTINGS_MAX, ROCKER_TLV_CMD_PORT_SETTINGS_MAX = -- 2.39.5