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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [drivers/] [net/] [README.de4x5] - Rev 901
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The de425/de434/de435/de500 driver in this distribution is designed to work
with the Digital Equipment Corporation series of PCI/EISA ethernet cards
(DE425, DE434, DE435, DE500) and with all kernels that support PCI.
Auto media detection is provided so that the media choice isn't compiled in
and is flexible enough to be able to reconfigure on-the-fly. This feature
hasn't been included for the DE500 unfortunately, due to a potential patent
dispute. When I get around to implementing the autosense algorithm by myself
(which could legally be difficult to prove since I'm part of the group that
has implemented the patented algorithm) you'll have an auto speed selection
for the de500. If you want the auto speed feature yell at Digital. If enough
of you do things might change.
The ability to load this driver as a loadable module has been included,
although I don't recommend its use with PCI, since PCI dynamically allocates
where the card will go at boot time (i.e. the card would have to be present
in the system at boot time for its address/IRQ to be assigned).
The performance we've achieved so far has been measured through the 'ttcp'
tool at 1.06MB/s for TCP and 1.17MB/s for UDP. This measures the total
stack performance which includes the card, so don't expect to get much
nearer the 1.25MB/s theoretical ethernet rate.
TCP UDP
TX RX TX RX
DE425 1030k 997k 1170k 1128k (EISA on a Dell 433DE)
DE434 1063k 995k 1170k 1125k (PCI: DECpc XL 466d2)
DE435 1063k 995k 1170k 1125k (PCI: DECpc XL 466d2)
DE500 1063k 998k 1170k 1125k in 10Mb/s mode (PCI: DECpc XL 466d2)
All values are typical (in kBytes/sec) from a sample of 4 for each
measurement. Their error is approx +/-20k on a quiet (private) network and
also depend on what load the CPU has, CPU speed etc.
ZYNX and SMC cards, which use the PCI DECchip DC21040, are not specifically
supported in this driver because
a) I have no information on them.
b) I cannot test them with the driver.
c) Donald Becker's 'tulip.c' driver works with them....well one person says
they do and another says they do not, so take your pick!
This driver can be made to work with the ZYNX (and may be the SMC) card by
setting a compile time flag (IS_NOT_DEC) in linux/drivers/net/CONFIG
Enjoy!
Dave
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