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