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100 commits

Author SHA1 Message Date
stephen hemminger
44dde56d37 sky2: jumbo packet changes
Change how FIFO is programmed in jumbo mode (to match vendor driver).
Mostly cosmetic, the only register change is that the bits 22,23
are not programemd used.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-12 16:21:01 -08:00
Jarek Poplawski
0c2dc318e8 sky2: Fix TX_MAP_PAGE misspelling
Btw of the dma-debug problem reported by Michael Breuer I spotted
a tiny misspelling in TX_MAP_PAGE definition introduced by commit
6b84dacadb.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-02 15:55:43 -08:00
Stephen Hemminger
d6b54d241c sky2: fix receive pause thresholds
Program the receive pause thresholds differently depending on
chip version. This cloned from from the vendor (GPL) driver.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29 22:57:27 -07:00
Stephen Hemminger
e91cd2e65f sky2: add register definitions for new chips
This adds infrastructure for the newer chip versions and workarounds.
Extracted from the vendor (GPL) driver.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29 22:57:25 -07:00
Stephen Hemminger
66466797c7 sky2: irqname based on pci address
This is based on Michal Schmidt fix for skge.

Most network drivers request their IRQ when the interface is activated.
sky2 does it in ->probe() instead, because it can work with two-port
cards where the two net_devices use the same IRQ. This works fine most
of the time, except in some situations when the interface gets renamed.
Consider this example:

1. modprobe sky2
   The card is detected as eth0 and requests IRQ 17. Directory
   /proc/irq/17/eth0 is created.
2. There is an udev rule which says this interface should be called
   eth1, so udev renames eth0 -> eth1.
3. modprobe 8139too
   The Realtek card is detected as eth0. It will be using IRQ 17 too.
4. ip link set eth0 up
   Now 8139too requests IRQ 17.

The result is:
WARNING: at fs/proc/generic.c:590 proc_register ...
proc_dir_entry '17/eth0' already registered

The fix is for sky2 to name the irq based on the pci device, as is done
by some other devices DRM, infiniband, ...  ie. sky2@pci:0000:00:00

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-01 15:14:55 -07:00
Mike McCormack
72c6068328 sky2: Use 32bit read to read Y2_VAUX_AVAIL
B0_CTST is a 24bit register according to the vendor driver (sk98lin).
A 16bit read on B0_CTST will always return 0 for Y2_VAUX_AVAIL (1<<16),
 so use a 32bit read when testing Y2_VAUX_AVAIL

Signed-off-by: Mike McCormack <mikem@ring3k.org>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-01 17:40:44 -07:00
Stephen Hemminger
10547ae2c0 sky2: fix management of driver LED
Observed by Mike McCormack.

The LED bit here is just a software controlled value used to
turn on one of the LED's on some boards. The register value was wrong,
which could have been causing some power control issues.
Get rid of problematic define use the correct mask.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-01 17:40:35 -07:00
Stephen Hemminger
724b694225 sky2: no recycling
Recycling turns out to be a bad idea!  For most use cases, the
packet can not be reused: TCP packets are cloned. Even for the ideal
case of forwarding, it hurts performance because of CPU ping/pong.
On a multi-core system forwarding of 64 byte packets is worse
much worse: recycling = 24% forwarded vs no recycling = 42% forwarded

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 20:26:53 -07:00
Stephen Hemminger
6b84dacadb sky2: optimize transmit completion
Don't reference the list element in hardware transmit ring on transmit
completion. The list element is updated by hardware, therefore
it causes a cache miss. Do book keeping in software structure.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 20:26:51 -07:00
Stephen Hemminger
ee5f68fea2 sky2: dynamic size transmit ring
Allocate and size transmit ring based on parameters. Saves excess
space and allows configuring larger rings for testing.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 20:26:48 -07:00
Stephen Hemminger
5dce95e568 sky2: transmit ring 64 bit conservation
This patch saves elements on transmit ring by only updating the upper
64 bit address when it changes. With many workloads skb's are located
in same region, so it saves space.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-18 20:26:43 -07:00
Stephen Hemminger
49d4b8ba97 sky2: remove restarting workaround flag
The whole restarting flag was introduced by Mike McCormack
and was a temporary duct tape patch around issues with transmits
inflight during restart. The problems it was covering are now
fixed and the code should have been reverted.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-14 16:35:41 -07:00
Stephen Hemminger
0ea065e52e sky2: fix pause negotiation
The sky2 driver combines auto speed negotiation with automatic negotiation
of pause parameters; but the ethtool interface expects them to be
split. This patch allows autonegotiation to be used for speed, but
manually disable flow control.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-14 15:36:41 -07:00
Mike McCormack
f6caa14aa0 sky2: Avoid transmits during sky2_down()
This patch supersedes my previous patch "sky2: Avoid transmitting
during sky2_restart".

I have reworked the patch to avoid crashes during both sky2_restart()
and sky2_set_ringparam().

Without this patch, the sky2 driver can be crashed by doing:

# pktgen eth1 &    (transmit many packets on eth1)
# ethtool -G eth1 tx 510

I am aware you object to storing extra state, but I can't see a way
around this. Without remembering that we're restarting,
netif_wake_queue() is called in the ISR from sky2_tx_complete(), and
netif_tx_lock() is used in sky2_tx_done().  If anybody can see a way
around this, please let me know.

Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-03 19:02:36 -07:00
Stephen Hemminger
bd1c6869f1 sky2: skb recycling
This patch implements skb recycling. It reclaims transmitted skb's
for use in the receive ring.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-17 18:46:54 -07:00
Stephen Hemminger
f71eb1a24a sky2: fix PM related regressions
Fix the problems reported for 2.6.27-rc1 caused by over aggressive
power management. Turning clock off on PCI Express is problematic for WOL,
and when doing multi-booting.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-08-07 01:55:50 -04:00
Stephen Hemminger
0ce8b98d55 sky2: 88E8057 chip support
Add support for Yukon 2 Ultra 2 chip set (88E8057) based on code in latest
version of vendor driver (sk98lin 10.60.2.3).  Untested on real hardware.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-06-17 23:59:39 -04:00
Stephen Hemminger
a068c0adf2 sky2: pci power savings
Turn on special bits to save more power when device is shutdown.
Tested on a limited range of hardware, some of the bits are for hardware
that probably isn't even in production (like Yukon Supreme) and was ported
from the vendor driver.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30 22:19:17 -04:00
Stephen Hemminger
db99b98885 sky2: put PHY in sleep when down
Put PHY int sleep mode (from vendor sk98lin 10.50 driver) when the
network device is brought down.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30 22:19:16 -04:00
Jesse Brandeburg
a300344ab9 sky2: fix simple define thinko
noticed while browsing code, apparent thinko.  compile tested only.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-13 01:31:44 -04:00
Stephen Hemminger
a84d0a3d69 sky2: fix LED management
Fix problems in LED management, so ethtool -p works correctly on Yukon-EC
and other chips. The driver was incorrectly setting the PHY LED overide bits.
Moral: read the spec sheet, not the vendor driver.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-02-24 00:07:39 -05:00
Stephen Hemminger
39dbd9587b sky2: fix for Yukon FE (regression in 2.6.25)
The Yukon FE chip has a ram buffer therefore it needs the alignment
restriction and hang check workarounds.

Therefore:
  * Autodetect the prescence/absence of ram buffer
  * Rename the flag value to reflect this
  * Use it consistently (ie don't reread register)

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-02-05 13:31:09 -05:00
Stephen Hemminger
ed4d41616b sky2: support for Yukon Supreme
Add support from sk98lin vendor driver 10.50.1.3 for 88E8055 and
88E8075 chips.  I don't have this hardware to test, so this changes
are untested.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-01-28 15:08:01 -08:00
Stephen Hemminger
86c6887e6f sky2: large memory workaround.
This patch might fix problems with 4G or more of memory.
It stops the driver from doing a small optimization for Tx and Rx,
and instead always sets the high-page on tx/rx descriptors.

Fixes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=9725

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-01-12 17:49:10 -05:00
Stephen Hemminger
b32f40c485 sky2: revert to access PCI config via device space
Using the hardware window into PCI config space is more reliable
and smaller/faster than using the pci_config routines. It avoids issues
with MMCONFIG etc.

Reverts: 167f53d05f

Please apply for 2.6.24

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-12-01 16:32:31 -05:00
Stephen Hemminger
cf06ffb4df sky2: handle advanced error recovery config issues
The PCI AER support may not work for a couple of reasons.
It may not be configured into the kernel or there may be a BIOS
bug that prevents MMCONFIG from working.  If MMCONFIG doesn't work
then the PCI registers that control AER will not be accessible via
pci_read_config functions; luckly there is another window to access
PCI space in the device, so use that.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-11-10 04:25:09 -05:00
Stephen Hemminger
7138a0f591 [SKY2]: use netdevice stats struct
Use builtin statistics structure from net device.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11 22:17:19 -07:00
Stephen Hemminger
167f53d05f sky2: use pci_config access functions
Use the PCI layer config access functions. The driver was using the
memory mapped window in device, to workaround issues accessing the
advanced error reporting registers.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:50:54 -07:00
Stephen Hemminger
555382cbfc sky2: advanced error reporting
Use the kernel interfaces for advanced error reporting.
This should be cleaner and clear up errors on boot.

For those systems with busted BIOS's that don't correctly
support mmconfig, advanced error reporting will be disabled.
The PCI registers for advanced error reporting start at 0x100 which
is too large to be accessed by legacy functions.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10 16:50:53 -07:00
Stephen Hemminger
efcf6e2feb sky2: document GPHY_CTRL bits
Add documentation of GPHY_CTRL register bits even if driver
is not using them (yet).

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-10 16:50:52 -07:00
Stephen Hemminger
bea3348eef [NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.

In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.

The signature of the ->poll() call back goes from:

	int foo_poll(struct net_device *dev, int *budget)

to

	int foo_poll(struct napi_struct *napi, int budget)

The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract).  The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.

The napi_struct is to be embedded in the device driver private data
structures.

Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler.  Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.

With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.

Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.

[ Ported to current tree and all drivers converted.  Integrated
  Stephen's follow-on kerneldoc additions, and restored poll_list
  handling to the old style to fix mutual exclusion issues.  -DaveM ]

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:47:45 -07:00
Stephen Hemminger
e0c281163d sky2: be more selective about FIFO watchdog
Be more selective about when to enable the ram buffer watchdog code.
It is unnecessary on XL A3 or later revs, and with Yukon FE
the buffer is so small (4K) that the watchdog detects false positives.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-25 00:04:17 -04:00
Stephen Hemminger
75e806838a sky2: receive FIFO checking
A driver writer from another operating system hinted that
the versions of Yukon 2 chip with rambuffer (EC and XL) have
a hardware bug that if the FIFO ever gets completely full it
will hang. Sounds like a classic ring full vs ring empty wrap around
bug.

As a workaround, use the existing watchdog timer to check for
ring full lockup.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-20 15:23:00 -04:00
Stephen Hemminger
05745c4ab1 sky2: fe+ chip support
Add support for newest Marvell chips.
The Yukon FE plus chip is found in some not yet released laptops.
Tested on hardware evaluation boards.

This version of the patch is for 2.6.23. It supersedes
the two previous patches that are sitting in netdev-2.6 (upstream branch).

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-20 15:23:00 -04:00
Stephen Hemminger
ea76e63598 sky2: reorganize chip revision features
This patch should cause no functional changes in driver behaviour.
There are (too) many revisions of the Yukon 2 chip now. Instead of
adding more conditionals based on chip revision; rerganize into a
set of feature flags so adding new versions is less problematic.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-20 15:23:00 -04:00
Stephen Hemminger
d6532232cd sky2: fix VLAN receive processing (resend)
The length check for truncated frames was not correctly handling
the case where VLAN acceleration had already read the tag.
Also, the Yukon EX has some features that use high bit of status
as security tag.

Signed-off-by: Pierre-Yves Ritschard <pyr@spootnik.org>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-20 15:22:59 -04:00
Stephen Hemminger
32c2c30085 sky2: only bring up watchdog if link is active
This fixes the extra timer overhead that people were whining about
as a 2.6.23 regression.

Running the watchdog timer all the time is unneeded. Change it
to run only if link is up, and reduce frequency to save power.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-08-25 02:31:08 -04:00
Stephen Hemminger
3cf267539f sky2: debug interface
Add an optional debug interface for displaying state of transmit/receive
rings. Creates a file debugfs/sky2/ethX for each device that is up.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-10 12:22:28 -04:00
Stephen Hemminger
6916161102 sky2: Yukon Extreme (88e8071) support.
Enable support for Yukon EX chipset (88e8071).
Most of changes are related to new commands to chip for transmit,
and change in status and checksumming.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-08 22:16:42 -04:00
Stephen Hemminger
8f70920f2f sky2: GPIO register
The General Purpose I/O register is yet another hardware workaround
catchall. Enable workaround that vendor driver does to stay
but for bug compatiable.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-08 22:16:42 -04:00
Stephen Hemminger
f449c7c106 sky2: rename BMU register
This register is more of a test and control register on Yukon2.
So rename it to Q_TEST and give some bit definitions.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-08 22:16:42 -04:00
Stephen Hemminger
fc99fe0618 sky2: Add PCI device specfic register 4 & 5
Need to setup more PCI control control registers are on Yukon EX.
Some of these also exist on Yukon EC-U as well.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-08 22:16:42 -04:00
Stephen Hemminger
d8511f8301 sky2: enable IRQ on duplex renegotiation
Don't want IRQ on FIFO error because there is nothing useful to do with it.
But do want IRQ on duplex change.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-30 09:54:32 -04:00
Stephen Hemminger
b4ed372b29 sky2: dont set bogus bit in PHY register
This code inherited from the sk98lin driver is incorrect on the Yukon2.
The GPHY_CTRL register values are specific to the internal PHY of the chip
and the values used were leftovers.
Driver was setting bit 13 which is now the INT polarity for the PHY!

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-30 09:52:47 -04:00
Stephen Hemminger
b628ed986d sky2: EC-U performance and jumbo support
The Yukon EC Ultra chips have transmit settings for store and
forward and PCI buffering. By setting these appropriately, normal
performance goes from 750Mbytes/sec to 940Mbytes/sec (non-jumbo).

It is also possible to do Jumbo mode, but it means turning off
TSO and checksum offload so the performance gets worse. There isn't
enough buffering for checksum offload to work.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-19 15:01:17 -04:00
Stephen Hemminger
40b01727a5 sky2: handle descriptor errors
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: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-19 15:01:17 -04:00
Stephen Hemminger
819067916d sky2: transmit timeout
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: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-17 15:30:47 -05:00
Stephen Hemminger
7e7c098221 sky2: dont flush good pause frames
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: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-17 15:30:47 -05:00
Stephen Hemminger
9374549428 sky2: Yukon Extreme support
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: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-07 18:50:46 -05:00
Stephen Hemminger
e3173832d7 sky2: add Wake On Lan support
Adds basic magic packet wake on lan support to the sky2 driver.
Note: initial WOL value is based on BIOS settings.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-07 18:49:59 -05:00