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 91aeb3edbc
Go back to hardcoding, since we know where the error registers are anyway.
Fixes http://bugzilla.kernel.org/show_bug.cgi?id=7222
Signed-off-by: Stephen Hemminger <shemmminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Fix the support for fiber connected gigabit boards.
Allow half duplex gigabit to be configured.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Don't use force status bit. It was never implemented on all chips, or has
no impact.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
sky2.h | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Logic error in the phy initialization code. Also, turn on wake on lan
bit in status control.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephe Hemminger <shemminger@osdl.org>
Signed-off-by: Stephen 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Expose all the available hardware statistics via ethtool.
And cleanup some of the statistics definitions.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.rog>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff 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: 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>
