There should never be descriptor error unless hardware or driver is buggy.
But if an error occurs, print useful information, clear irq, and recover.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The transmit timeout code could hang, and it would not clear out
problems if the hardware was stuck.  Change the code to effectively do
a device down/up similar to the suspend/resume code.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Don't mark pause frames as errors. This problem caused transmitter not
to pause and would effectively take out a gigabit switch because the
it can't handle overrun.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This is basic support for the new Yukon Extreme
chip, extracted from the new vendor driver 10.0.4.3.

Since this is untested hardware, it has a big fat warning for now.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Adds basic magic packet wake on lan support to the sky2 driver.
Note: initial WOL value is based on BIOS settings.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Improve power management and error handling by using pci_set_power_state(),
instead of driver doing PCI PM register changes in the driver.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Get rid of sparse warnings in sky2 driver because of mixed enum
usage.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch makes the receive performance on some systems go from
714MB/s to 941MB/s. It adjusts the watermark of the receive queue
to be lower, thereby avoiding excess hardware flow control. This is
most important on the systems which have little/no additional buffering.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

If using Message Signaled Interrupts (MSI) then the IRQ will never
be shared. Don't call pci_disable_msi() unless using MSI.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Update workarounds for 88E803X based on the latest SysKonnect vendor
driver version (8.41). Tested on EC_U rev A1, only.
These up the receive performance.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This reverts earlier change that attempted to fix flow control.
Device needs to discard pause frames, otherwise it hangs after a while.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>

The result of flow control negotiation should not limit the next
negotiatition. If board is plugged into an old half duplex 10Mbit port,
without pause, then replugged into a gigabit port, it should negotiate
what is desired, not inherit that last negotiation.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>

The advertising bits (from ethtool.h) fit in 16 bits.

The pci express error handling extensions don't work unless PCI access is via
mmconfig. Otherwise, all accesses to pci config registers greater than 256 fail.
Since the sky2 driver has other ways of getting to PCI config space, it works
around this short coming, but the pci_find_ext_capablity doesn't work.

This backs out commit 91aeb3ed
Go back to hardcoding, since we know where the error registers are anyway.
Fixes  http://bugzilla.kernel.org/show_bug.cgi?id=7222Signed-off-by: NStephen Hemminger <shemmminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Use hardware support for chained receive to break up large frames
into multiple pages. This avoids having to do a mult-page allocation
that can fail on a busy system due to fragmented memory.

For normal size MTU, this code behaves the same.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Use the netdevice transmit lock via netif_tx_lock rather than putting
lock in device specific code and using lockless transmit.  The code is
cleaner using netif_tx_lock, and the performance is same.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Since a transmit can take several control blocks, the old code waited
until the last control block was marked as done. This code processes
the return values incrementally. This makes slots in the tx ring available
and less chance of getting stuck.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Use the standard pci capability mechanism to access PCI express error
registers, rather than hard coding the offset. Mask off the PCI express
error from ever occuring on non-PCI express systems.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Fix support for big endian platforms like PPC.
Still not sure about VLAN acceleration (does it need swapping)?
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Fix the support for fiber connected gigabit boards.
Allow half duplex gigabit to be configured.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Fix problems with transmit pause frames. The driver was telling the
GMAC to flush (not process) pause frames. Manually disabling pause wasn't
working because of problems in the setup.

This maybe the cause of the lockup under load.
	http://bugzilla.kernel.org/show_bug.cgi?id=6839

Patch against netdev-2.6 git tree
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Since many packets have the same checksum starting offset and insertion
location; the driver can save the last information and only tell hardware
when it changes.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Don't use force status bit. It was never implemented on all chips, or has
no impact.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Patch to correct broken collision threshold mask in sky2 driver.  Should be
three bits wide, but the mask only allows for 1 bit to be set.

Thanks & Regards
Neil
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>

 sky2.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Logic error in the phy initialization code. Also, turn on wake on lan
bit in status control.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The newest Yukon Ultra chipset's require more special tweaks.
They seem to be like the Yukon XL chipsets. This code is transliterated
from the latest SysKonnect driver; I don't have any Ultra hardware.
Signed-off-by: NStephe Hemminger <shemminger@osdl.org>
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>

Add an fake NAPI schedule once a second. This is an attempt to work around
for broken configurations with edge-triggered interrupts.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Sky2 driver will oops referencing bad memory if used on
a dual port card.  The problem is accessing past end of
MIB counter space.

Applies for both 2.6.17 and 2.6.16 (with fuzz)
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Expose all the available hardware statistics via ethtool.
And cleanup some of the statistics definitions.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The hardware has additional error trap interrupt bits.  I have never seen
them trigger, but if they do, it looks like this might be useful.
Signed-off-by: NStephen Hemminger <shemminger@osdl.rog>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Add MSI support to sky2 driver.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Redo the interupt handling of sky2 driver based on the IRQ mangement
documentation. All interrupts are handled by the device0 NAPI poll
routine.

Don't need to adjust interrupt mask in IRQ context, done only when
changing device under RTNL. Therefore don't need hwlock anymore.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Remove wake on lan support for now. It doesn't work right, and I
don't have a machine with working suspend/resume to test or fix it.
It will be re-enabled later.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The Yukon EC/rev0 (A1) chipset requires a bunch of workarounds. I copied these
from sk98lin.  But since they never got tested and add more cruft to the code;
any attempt at using driver as is on this version will probably fail.

It looks like this was a early engineering sample chip revision, if it ever shows
up on a real system. Produce an error message.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

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: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NJeff 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: NStephen 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: NStephen 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: NStephen 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: NJeff Garzik <jgarzik@pobox.com>