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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 <sfeldma@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Scott Feldman 2015-07-08 16:06:47 -07:00 committed by David S. Miller
parent 910be1abbe
commit 77a58c741d
2 changed files with 62 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/net/ethernet/rocker/rocker.c
View File

@ -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,

1
drivers/net/ethernet/rocker/rocker.h
View File

@ -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 =