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Commit 77a58c74 authored by Scott Feldman's avatar Scott Feldman Committed by David S. Miller
Browse files

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: default avatarScott Feldman <sfeldma@gmail.com>
Reviewed-by: default avatarSimon Horman <simon.horman@netronome.com>
Tested-by: default avatarSimon Horman <simon.horman@netronome.com>
Acked-by: default avatarJiri Pirko <jiri@resnulli.us>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 910be1ab

drivers/net/ethernet/rocker/rocker.c

+61 −0
Original line number Diff line number Diff line
@@ -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,

drivers/net/ethernet/rocker/rocker.h

+1 −0
Original line number Diff line number Diff line
@@ -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 =