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Subjecttulip vs. de4x5 (was Re: Linux 2.4 Status / TODO page ...)
Jeff Garzik wrote:
>
>
> de4x5 is becoming EISA-only in 2.5.x too, since its PCI support is
> duplicated now in tulip driver.
>

I've got some DEC Miatas with DECchip 21142/43 ethernet cards, and I
don't get the same link speeds when using the de4x5 and tulip drivers,
as of 2.4.0-test10. The machines are connected to a Netgear 16-port
10/100 hub. With the tulip driver the hub shows a 10 Mb/s connection;
with the de4x5 driver the hub shows a 100 Mb/s connection. In both
cases the drivers are configured into the kernel, not as modules, if
it matters.

Am I doing something wrong, or is this a known issue?

FWIW, these machines are diskless, and according to the hub they download
the kernel at 100 Mb/s. When the tulip-based kernel initializes the
card, the hub shows the link speed switching to 10 Mb/s.


from lspci -v:

00:03.0 Ethernet controller: Digital Equipment Corporation DECchip 21142/43 (rev
30)
Flags: bus master, medium devsel, latency 255, IRQ 24
I/O ports at 8000 [size=128]
Memory at 0000000009000000 (32-bit, non-prefetchable) [size=128]
Expansion ROM at 0000000009040000 [disabled] [size=256K]


de4x5 boot messages:

eth0: DC21143 at 0x8000 (PCI bus 0, device 3), h/w address 00:00:f8:76:3c:74,
and requires IRQ24 (provided by PCI BIOS).
de4x5.c:V0.545 1999/11/28 davies@maniac.ultranet.com


tulip boot messages:

Linux Tulip driver version 0.9.10 (September 6, 2000)
eth0: Digital DS21143 Tulip rev 48 at 0x8000, 00:00:F8:76:3C:74, IRQ 24.
eth0: EEPROM default media type Autosense.
eth0: Index #0 - Media 10baseT (#0) described by a 21142 Serial PHY (2) block.
eth0: Index #1 - Media 10baseT-FD (#4) described by a 21142 Serial PHY (2)
block.
eth0: Index #2 - Media 10base2 (#1) described by a 21142 Serial PHY (2) block.
eth0: Index #3 - Media AUI (#2) described by a 21142 Serial PHY (2) block.
eth0: Index #4 - Media MII (#11) described by a 21142 MII PHY (3) block.
eth0: MII transceiver #5 config 2000 status 784b advertising 01e1.

-- Jim

-----
James A. Schutt
jaschut@sandia.gov

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