Commit Graph

25 Commits

Author SHA1 Message Date
dave graham
0a834a36ac e1000e: Remove mutex_trylock and associated WARN on failure.
Single-thread access must be ensured for ICH8 NVM and PHY operations.
This synchronization is provided by the nvm_mutex. To assist in
understanding the contexts from which this code could be reached,
a WARN was output if the mutex was not going to be immediately
acquirable (if !mutex_trylock()). The code has now been optimized,
and we have verified that the few remaining mutex contentions are
reasonable and non-blocking, and it is time to remove the
mutex_trylock() and WARN messages.

Signed-off-by: dave graham <david.graham@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-14 23:46:10 -08:00
David Graham
eefacf3b4f e1000e: Add process name to WARN message when detecting Mutex contention
Adds process name of the current mutex holder to the WARN message output
when the e1000e driver attempts to acquire the nvm_mutex and finds that
it is already being held. With this patch the WARN message indicates
both the process name of the current mutex holder and the process name of
the attempted acquisition, which together will help to identify the
contending codepaths.

Signed-off-by: David Graham <david.graham@intel.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-11 00:04:11 -08:00
David S. Miller
eb14f01959 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:

	drivers/net/e1000e/ich8lan.c
2008-12-15 20:03:50 -08:00
Jeff Kirsher
30bb0e0dce e1000e: fix double release of mutex
During a reset, releasing the swflag after it failed to be acquired would
cause a double unlock of the mutex.  Instead, test whether acquisition of
the swflag was successful and if not, do not release the swflag.  The reset
must still be done to bring the device to a quiescent state.

This resolves [BUG 12200] BUG: bad unlock balance detected! e1000e
http://bugzilla.kernel.org/show_bug.cgi?id=12200

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-11 21:28:11 -08:00
Bruce Allan
e243455d34 e1000e: check return code from NVM accesses and fix bank detection
Check return code for all NVM accesses[1] and error out accordingly; log
a debug message for failed accesses.

For ICH8/9, the valid NVM bank detect function was not checking whether the
SEC1VAL (sector 1 valid) bit in the EECD register was itself valid (bits 8
and 9 also have to be set).  If invalid, it would have defaulted to the
possibly invalid bank 0.  Instead, try to use the valid bank detection
method used by ICH10 which has been cleaned up a bit.

[1] - reads and updates only; not writes because those are only writing to
the Shadow RAM, the update following the write is the only thing actually
writing the modified Shadow RAM contents to the NVM.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-21 17:02:41 -08:00
Bruce Allan
0285c8dcae e1000e: cosmetic newline in debug message
Add missing newline from debug message.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-21 16:59:54 -08:00
Bruce Allan
5c48ef3e20 e1000e: sync change flow control variables with ixgbe
Sync flow control variables and usage model with that found in the ixgbe
driver.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-21 16:57:36 -08:00
Bruce Allan
1605927fce e1000e: update comments listing supported parts for each MAC family
Some branding strings (displayed via lspci) are missing from the comments in
various family-specific files in the driver.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-21 16:51:06 -08:00
David S. Miller
4dd565134e Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:

	drivers/net/e1000e/ich8lan.c
	drivers/net/e1000e/netdev.c
2008-10-08 14:56:41 -07:00
Linus Torvalds
95b866d5af e1000e: Fix incorrect debug warning
Doing 'WARN_ON(preempt_count())' was horribly horribly wrong, and would
cause tons of warnings at bootup if PREEMPT was enabled because the
initcalls currently run with the kernel lock, which increments the
preempt count.

At the same time, the warning was also insufficient, since it didn't
check that interrupts were enabled.

The proper debug function to use for something that can sleep and wants
a warning if it's called in the wrong context is 'might_sleep()'.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-03 09:18:17 -07:00
Thomas Gleixner
717d438d1f e1000e: debug contention on NVM SWFLAG
This patch adds a mutex to the e1000e driver that would help
catch any collisions of two e1000e threads accessing hardware
at the same time.

description and patch updated by Jesse

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:13 -07:00
Jesse Brandeburg
37f40239f4 e1000e: reset swflag after resetting hardware
in the process of debugging things, noticed that the swflag is not reset
by the driver after reset, and the swflag is probably not reset unless
management firmware clears it after 100ms.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-02 18:28:12 -07:00
Bruce Allan
4a77035828 e1000e: write protect ICHx NVM to prevent malicious write/erase
Set the hardware to ignore all write/erase cycles to the GbE region in
the ICHx NVM.  This feature can be disabled by the WriteProtectNVM module
parameter (enabled by default) only after a hardware reset, but
the machine must be power cycled before trying to enable writes.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: arjan@linux.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-01 17:31:25 -07:00
Bruce Allan
2e2e8d53c3 e1000e: remove failed request for sw/fw/hw flag
When the driver fails to acquire the control flag used to serialize
NVM and PHY accesses between the driver, firmware and hardware, remove the
request for the flag otherwise the hardware might grant the flag when it
becomes available but the driver will not release the flag.  This could
cause the firmware to prevent the driver getting the flag for all future
attempts.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-09-24 20:48:51 -04:00
Bruce Allan
4662e82b2c e1000e: add support for new 82574L part
This new part has the same feature set as previous parts with the addition
of MSI-X support.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-09-03 10:08:13 -04:00
Bruce Allan
f4187b56e1 e1000e: add support for 82567LM-3 and 82567LF-3 (ICH10D) parts
Add support for new LOM devices on the latest generation ICHx platforms.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-09-03 10:06:47 -04:00
Bruce Allan
2f15f9d601 e1000e: add support for the 82567LM-4 device
Enable PCI device ID for a new combination of MAC and PHY already supported
in the driver.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-09-03 10:06:02 -04:00
Bruce Allan
97ac8caee2 e1000e: Add support for BM PHYs on ICH9
This patch adds support for the BM PHY, a new PHY model being used
on ICH9-based implementations.

This new PHY exposes issues in the ICH9 silicon when receiving
jumbo frames large enough to use more than a certain part of the
Rx FIFO, and this unfortunately breaks packet split jumbo receives.
For this reason we re-introduce (for affected adapters only) the
jumbo single-skb receive routine back so that people who do
wish to use jumbo frames on these ich9 platforms can do so.
Part of this problem has to do with CPU sleep states and to make
sure that all the wake up timings are correctly we force them
with the recently merged pm_qos infrastructure written by Mark
Gross. (See http://lkml.org/lkml/2007/10/4/400).

To make code read a bit easier we introduce a _IS_ICH flag so
that we don't need to do mac type checks over the code.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-06 12:04:14 -04:00
Jeff Kirsher
69e3fd8ccc e1000e: rename a few functions
Several minor cosmetic function renames.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-16 20:41:37 -04:00
Jeff Kirsher
e9ec2c0f4b e1000e: Make arrays out of these Rx/Tx registers
With multiple queues coming into the code these base control
registers need to be made into arrays.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-16 20:41:36 -04:00
Jeff Kirsher
318a94d689 e1000e: reorganize PHY and flow control interface
This reorganization moves the PHY status into a separate
struct. Flow Control setup is moved into this struct as well
and frame size away from here into the adapter struct where its
inly use is.

The post-link-up code is now a separate function and moved out
of the watchdog function itself. This allows us to track the
es2lan restart issue a bit easier.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-28 22:15:00 -04:00
Jeff Kirsher
e2de3eb69c e1000e: rename mc_addr_list_update
Rename this function to be consistent with function naming (verb first)

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-28 22:14:58 -04:00
Bruce Allan
ad68076e07 e1000e: reformat comment blocks, cosmetic changes only
Adjusting the comment blocks here to be code-style compliant. no
code changes.

Changed some copyright dates to 2008.

Indentation fixes.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-28 22:14:56 -04:00
Auke Kok
489815ce22 e1000e: fix spelling errors in comments
Fix some spelling errors and inconsistencies in comment blocks.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-02-24 00:07:50 -05:00
Auke Kok
bc7f75fa97 [E1000E]: New pci-express e1000 driver (currently for ICH9 devices only)
This driver implements support for the ICH9 on-board LAN ethernet
device. The device is similar to ICH8.

The driver encompasses code to support 82571/2/3, es2lan and ICH8
devices as well, but those device IDs are disabled and will be
"lifted" from the e1000 driver over one at a time once this driver
receives some more live time.

Changes to the last snapshot posted are exclusively in the internal
hardware API organization. Many thanks to Jeff Garzik for jumping in
and getting this organized with a keen eye on the future layout.

[ Integrated napi_struct patch from Auke as well... -DaveM ]

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:50:40 -07:00