Messages in this thread | | | Subject | Re: e100 NETDEV WATCHDOG transmit timeout since 2.6.4 | From | Eamonn Hamilton <> | Date | Wed, 21 Apr 2004 10:42:41 +0100 |
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Hi Scott,
Thanks for the patch - a bit of manual fumbling to get it applied, but it seems to work ok so far ( ~46 minutes, so it's not exactly definitive :)
Certainly it doesn't make things worse in my case at least.
Cheers, Eamonn
On Wed, 2004-04-21 at 00:04, Scott Feldman wrote: > 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: -- Eamonn Hamilton
Senior Technical Designer Technical Projects and Design (North)
Tel : +44 (0) 1224 333833 Fax : +44 (0) 1224 840032 Email eamonn.hamilton@saic.com
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