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Date: Wed, 8 Jul 2015 16:06:47 -0700
From: sfeldma@...il.com
To: netdev@...r.kernel.org
Cc: jiri@...nulli.us
Subject: [PATCH net-next] rocker: add change MTU support
From: Scott Feldman <sfeldma@...il.com>
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@...il.com>
---
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 2d8578cade..c005167 100644
--- a/drivers/net/ethernet/rocker/rocker.c
+++ b/drivers/net/ethernet/rocker/rocker.c
@@ -1818,6 +1818,30 @@ rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
}
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,
void *priv)
@@ -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 c61fbf9..08b2c3d 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 =
--
1.7.10.4
--
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