Remove Message Signaled Interrupt support (for 2.6.16).
MSI is inherently edge-triggered and that is incompatiable (without more
work) with NAPI.
In future, will replace with smarter lockless-IRQ handling like
tg3.c
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Need to avoid race in updating IRQ mask. This can probably be replaced
smarter use of the interrupt control registers (if/when chipset
docs are available).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
To avoid problems with PCI config access without ACPI (or busted ACPI tables),
use the device's window into PCI config space.
I know this probably will upset the purists, but I would rather have users
than ACPI testers. It also generates less code.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Add more complete setup code for Yukon EC_U chipset.
Based on matching code in 8.31 code in SysKonnect vendor driver.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
This hardware supports Message Signaled interrupts.
When setting up, use software interrupt to check for bad hardware.
Signed-off-by: Stephen Hemminger <shemminger @osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
There were bugs in mmconfig access to PCI space, up to and
include 2.6.16-rc1. These prevented the sky2 driver from being
able to clear PCI express errors.
This patch makes the driver check (during probe), for errors
in PCI config access and fail.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Split Tx and Rx ring into two different data structures.
Tx needs the next value (to handle partial status), and
Rx always needs the mapaddr (to handle resubmitting same buffer).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Don't need to keep track of mapping length in ring structure
because we can get the same info from other info.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Do phy processing in a work queue rather than a tasklet.
This means we can let bottom halves run.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
It is a useful optimization to rearrange the structure
slightly to align receive and transmit portions.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Eliminate special case tuning for PCI-Express. This code
causes receive hangs and doesn't help performance much anyway.
Signed-off-by: Stephen Hemminger <shemmnger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Add support for Yukon-EC Ultra chip as implemented in SysKonnect's
driver version 8.26.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
The sky2 driver has a lot of register definitions, that were
copied over from the skge driver, for areas that don't exist
on the Yukon2.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Add better power management, and power down the chip on device removal
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
The Yukon2 chip FIFO has a problem recovering from a pause frame
if the receive buffer is not aligned. The workaround is to just
leave receive buffer at original alignment, which will make IP
header unaligned. Rework receive logic for clarity.
Need to ignore receive overrun interrupts (or mac hangs).
These fixes make the sky2 driver generally usable.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Here is revised patch against netdev sky2 branch.
It includes whitespace fixes, all the changes from the previous
review as well as some optimizations and timing fixes to
solve some of the hangs.
The stall problem is better but not perfect. It appears that
under stress the chip can't keep up with the bus
and sends a pause frame, then hangs. This version is for
testing, and hopefully other eyes might see the root
cause of the problem.
I don't want to reinvent the ugly watchdog code in the syskonnect
version of sk98lin. If you read it you will see, the original
driver writer and the hardware developer obviously didn't
understand each other.
Dual port support is included, but not tested yet. It did
require small change to NAPI since both ports share same
IRQ.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
New driver for the Marvell Yukon2 Gigabit Ethernet chipset.
This driver is based on the skge driver, but using the logic
from the SysKonnect version of the sk98lin driver.
It should support all the Yukon2 chipsets that are available
in many current Intel and AMD motherboards.
The driver does support ethtool, tx and rx checksum, and
tcp segmentation offload. But it has only been tested for
a short while and is known to stop receiving under heavy load.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
