tree 676ff9cba6f3f8bff8715c7f78cf3d1cea473872
parent fe113638328995b69d8797e6466b29661b1602d1
author [EMAIL PROTECTED] <[EMAIL PROTECTED]> Thu, 04 Aug 2005 02:33:12 -0700
committer Jeff Garzik <[EMAIL PROTECTED]> Thu, 11 Aug 2005 08:10:45 -0400
[PATCH] S2io: Support for runtime MTU change
Hi,
Patch below supports MTU change on-the-fly(without bringing interface
down)
Signed-off-by: Ravinandan Arakali <[EMAIL PROTECTED]>
Signed-off-by: Raghavendra Koushik <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
drivers/net/s2io.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -2849,6 +2849,7 @@ int s2io_xmit(struct sk_buff *skb, struc
}
txdp->Control_2 |= config->tx_intr_type;
+
txdp->Control_1 |= (TXD_BUFFER0_SIZE(frg_len) |
TXD_GATHER_CODE_FIRST);
txdp->Control_1 |= TXD_LIST_OWN_XENA;
@@ -4246,14 +4247,6 @@ int s2io_ioctl(struct net_device *dev, s
int s2io_change_mtu(struct net_device *dev, int new_mtu)
{
nic_t *sp = dev->priv;
- XENA_dev_config_t __iomem *bar0 = sp->bar0;
- register u64 val64;
-
- if (netif_running(dev)) {
- DBG_PRINT(ERR_DBG, "%s: Must be stopped to ", dev->name);
- DBG_PRINT(ERR_DBG, "change its MTU\n");
- return -EBUSY;
- }
if ((new_mtu < MIN_MTU) || (new_mtu > S2IO_JUMBO_SIZE)) {
DBG_PRINT(ERR_DBG, "%s: MTU size is invalid.\n",
@@ -4261,11 +4254,22 @@ int s2io_change_mtu(struct net_device *d
return -EPERM;
}
- /* Set the new MTU into the PYLD register of the NIC */
- val64 = new_mtu;
- writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
-
dev->mtu = new_mtu;
+ if (netif_running(dev)) {
+ s2io_card_down(sp);
+ netif_stop_queue(dev);
+ if (s2io_card_up(sp)) {
+ DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
+ __FUNCTION__);
+ }
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ } else { /* Device is down */
+ XENA_dev_config_t __iomem *bar0 = sp->bar0;
+ u64 val64 = new_mtu;
+
+ writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
+ }
return 0;
}
-
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