On Tue, 20 Apr 2004, Mike Keehan wrote:
> I am getting these too in recent kernels, but only on a
> 10Mhz half-duplex network. I have to manually down
> and up the interface to recover.
>
> On a 100Mhz switched network, the e100 is OK (at least 12hours+).
Mike/Eamonn,
Give this patch a try. This adds a required workaround for ICH when
working at 10/Half. (Guessing you have an ICH system).
--- linux-2.5/drivers/net/e100.c 2004-04-20 15:52:24.000000000 -0700
+++ linux-2.5/drivers/net/e100.c.mod 2004-04-20 15:55:32.000000000 -0700
@@ -287,6 +287,7 @@ enum scb_cmd_hi {
};
enum scb_cmd_lo {
+ cuc_nop = 0x00,
ruc_start = 0x01,
ruc_load_base = 0x06,
cuc_start = 0x10,
@@ -514,10 +515,11 @@ struct nic {
/* End: frequently used values: keep adjacent for cache effect */
enum {
- ich = (1 << 0),
- promiscuous = (1 << 1),
- multicast_all = (1 << 2),
- wol_magic = (1 << 3),
+ ich = (1 << 0),
+ promiscuous = (1 << 1),
+ multicast_all = (1 << 2),
+ wol_magic = (1 << 3),
+ ich_10h_workaround = (1 << 4),
} flags ____cacheline_aligned;
enum mac mac;
@@ -1225,6 +1227,12 @@ static void e100_watchdog(unsigned long
/* Issue a multicast command to workaround a 557 lock up */
e100_set_multicast_list(nic->netdev);
+ if(nic->flags & ich && cmd.speed==SPEED_10 && cmd.duplex==DUPLEX_HALF)
+ /* Need SW workaround for ICH[x] 10Mbps/half duplex Tx hang. */
+ nic->flags |= ich_10h_workaround;
+ else
+ nic->flags &= ~ich_10h_workaround;
+
mod_timer(&nic->watchdog, jiffies + E100_WATCHDOG_PERIOD);
}
@@ -1244,7 +1252,17 @@ static inline void e100_xmit_prepare(str
static int e100_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct nic *nic = netdev->priv;
- int err = e100_exec_cb(nic, skb, e100_xmit_prepare);
+ int err;
+
+ if(nic->flags & ich_10h_workaround) {
+ /* SW workaround for ICH[x] 10Mbps/half duplex Tx hang.
+ Issue a NOP command followed by a 1us delay before
+ issuing the Tx command. */
+ e100_exec_cmd(nic, cuc_nop, 0);
+ udelay(1);
+ }
+
+ err = e100_exec_cb(nic, skb, e100_xmit_prepare);
switch(err) {
case -ENOSPC:
|