Date: Wed, 3 Feb 1999 16:37:14 -0500 (EST) From: Bill Paul <wpaul@skynet.ctr.columbia.edu> To: clkao@CirX.ORG (Chia-liang Kao) Cc: current@FreeBSD.ORG Subject: Re: problem with vr0 Message-ID: <199902032137.QAA07284@skynet.ctr.columbia.edu> In-Reply-To: <199902031623.AAA43583@genius.cirx.org> from "Chia-liang Kao" at Feb 4, 99 00:23:47 am
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Of all the gin joints in all the towns in all the world, Chia-liang Kao
had to walk into mine and say:
[chop]
> * - Can you show me the output of the following:
> *
> * pciconf -r pci0:19:0 0xc
> *
> * I want to see what the latency timer setting looks like.
> It shows `0x00002008'
Hmm... Alright, I have a patch I'd like you to try. I don't know that
this will really have an effect, but I'm curious to see what it does.
If this doesn't work, then the only other thing I can think of is if
you can give me login access to your machine so that I can try some
experiments.
Anyway, to apply the patch, do the following:
- Save this message to /tmp/vr.patch (or something similar).
- Become root.
- Type the following:
# cd /sys/pci
# patch < /tmp/vr.patch
- Compile a new kernel and boot it.
Let me know if this has any effect on the card's behavior.
-Bill
--
=============================================================================
-Bill Paul (212) 854-6020 | System Manager, Master of Unix-Fu
Work: wpaul@ctr.columbia.edu | Center for Telecommunications Research
Home: wpaul@skynet.ctr.columbia.edu | Columbia University, New York City
=============================================================================
"It is not I who am crazy; it is I who am mad!" - Ren Hoek, "Space Madness"
=============================================================================
*** ../CVSWORK/sys_pci/if_vr.c Mon Feb 1 16:25:52 1999
--- if_vr.c Wed Feb 3 16:11:24 1999
***************
*** 899,905 ****
vm_offset_t pbase, vbase;
#endif
u_char eaddr[ETHER_ADDR_LEN];
! u_int32_t command;
struct vr_softc *sc;
struct ifnet *ifp;
int media = IFM_ETHER|IFM_100_TX|IFM_FDX;
--- 899,905 ----
vm_offset_t pbase, vbase;
#endif
u_char eaddr[ETHER_ADDR_LEN];
! u_int32_t command, lat;
struct vr_softc *sc;
struct ifnet *ifp;
int media = IFM_ETHER|IFM_100_TX|IFM_FDX;
***************
*** 988,993 ****
--- 988,1002 ----
goto fail;
}
+ /* bump up the latency timer a little */
+ command = pci_conf_read(config_id, VR_PCI_LATENCY_TIMER);
+ lat = (command & 0x0000FF00) >> 8;
+ if (lat < 64) {
+ command &= 0xFFFF00FF;
+ command |= 0x00004000;
+ pci_conf_write(config_id, VR_PCI_LATENCY_TIMER, command);
+ }
+
/* Reset the adapter. */
vr_reset(sc);
***************
*** 1675,1680 ****
--- 1684,1692 ----
VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH);
VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD);
+
+ /* Adjust configuration a little */
+ CSR_WRITE_2(sc, VR_BCR0, 0x0006);
/* Init circular RX list. */
if (vr_list_rx_init(sc) == ENOBUFS) {
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