Some onboard RTL8169 NICs seem to leave the EEPROM pins disconnected.
The existing is_valid_ether_addr() test will not necessarily catch
this, since it expects a missing EEPROM to show up as a MAC address of
00:00:00:00:00:00 or ff:ff:ff:ff:ff:ff. When the EEPROM pins are
floating the MAC address may read as e.g. 00:00:00:00:0f:00, which
will not be detected as invalid.
Check the ID word in the first two bytes of the EEPROM (which should
have the value 0x8129 for all RTL8139 and RTL8169 chips), and use this
to determine whether or not an EEPROM is present.
Reported-by: Carl Karsten <carl@nextdayvideo.com>
Tested-by: Carl Karsten <carl@nextdayvideo.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[realtek] Force EEPROM CS low before disabling EEPROM access mode
Some RTL8169 cards seem to drive the EEPROM CS line high (i.e. active)
when 9346CR.EEM is set to "normal operating mode", with the result
that the CS line is never deasserted. The symptom of this is that the
first read from the EEPROM will work, while all subsequent reads will
return garbage data.
Reported-by: Thomas Miletich <thomas.miletich@gmail.com>
Debugged-by: Thomas Miletich <thomas.miletich@gmail.com>
Tested-by: Thomas Miletich <thomas.miletich@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some RTL8169 cards (observed with an RTL8169SC) power up with
TCR.MXDMA set to 16 bytes. While this does not prevent proper
operation, it almost certainly degrades performance.
Fix by explicitly setting TCR.MXDMA to "unlimited".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[realtek] Use explicit values for RCR.RXFTH and RCR.MXDMA
Some RTL8169 cards (observed with an RTL8169SC) power up with invalid
values in RCR.RXFTH and RCR.MXDMA, causing receive DMA to fail. Fix
by setting explicit values for both fields.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
[realtek] Support RTL8139 cards within generic Realtek driver
RTL8139C+ cards use essentially the same datapath as RTL8169, which is
zerocopy and 64-bit capable. Older RTL8139 cards use a single receive
ring buffer rather than a descriptor ring, but still share substantial
amounts of functionality with RTL8169.
Include support for RTL8139 cards within the generic Realtek driver,
since there is no way to differentiate between RTL8139 and RTL8139C+
cards based on the PCI IDs alone.
Many thanks to all the people who worked on the rtl8139 driver over
the years.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown