From: Aurelien Jacquiot <a-jacqu...@ti.com>
Replace default Ethernet-specific routine by the custom one to allow
setting of larger MTU supported by RapidIO messaging (max RIO packet
size is 4096 bytes).
Signed-off-by: Aurelien Jacquiot <a-jacqu...@ti.com>
Signed-off-by: Alexandre Bounine <alexandre.boun...@idt.com>
Cc: Matt Porter <mpor...@kernel.crashing.org>
Cc: Andre van Herk <andre.van.h...@prodrive-technologies.com>
Cc: linux-ker...@vger.kernel.org
Cc: netdev@vger.kernel.org
---
drivers/net/rionet.c | 17 +++++++++++++++--
1 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
index e7034c5..d3d6e35 100644
--- a/drivers/net/rionet.c
+++ b/drivers/net/rionet.c
@@ -48,6 +48,8 @@ MODULE_LICENSE("GPL");
#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
#define RIONET_MAX_NETS 8
+#define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE
+#define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN)
struct rionet_private {
struct rio_mport *mport;
@@ -443,6 +445,17 @@ static void rionet_set_msglevel(struct net_device *ndev,
u32 value)
rnet->msg_enable = value;
}
+static int rionet_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ if ((new_mtu < 68) || (new_mtu > RIONET_MAX_MTU)) {
+ printk(KERN_ERR "%s: Invalid MTU size %d\n",
+ ndev->name, new_mtu);
+ return -EINVAL;
+ }
+ ndev->mtu = new_mtu;
+ return 0;
+}
+
static const struct ethtool_ops rionet_ethtool_ops = {
.get_drvinfo = rionet_get_drvinfo,
.get_msglevel = rionet_get_msglevel,
@@ -454,7 +467,7 @@ static const struct net_device_ops rionet_netdev_ops = {
.ndo_open = rionet_open,
.ndo_stop = rionet_close,
.ndo_start_xmit = rionet_start_xmit,
- .ndo_change_mtu = eth_change_mtu,
+ .ndo_change_mtu = rionet_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
@@ -489,7 +502,7 @@ static int rionet_setup_netdev(struct rio_mport *mport,
struct net_device *ndev)
ndev->dev_addr[5] = device_id & 0xff;
ndev->netdev_ops = &rionet_netdev_ops;
- ndev->mtu = RIO_MAX_MSG_SIZE - 14;
+ ndev->mtu = RIONET_MAX_MTU;
ndev->features = NETIF_F_LLTX;
SET_NETDEV_DEV(ndev, &mport->dev);
ndev->ethtool_ops = &rionet_ethtool_ops;
--
1.7.8.4
