Disable IRQs while injecting SDRAM errors. The RT patches exposed
a spinlock deadlock where the spinlock taken for the regmap write
deadlocked with the IRQ clear regmap write.
Error injection is not normally enabled for ECC but only for testing.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1476906827-9412-1-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Add the IRQF_ONESHOT and IRQF_TRIGGER_HIGH flags to disable the IRQ
while executing the IRQ handler. Remove the IRQF_SHARED because these
are not shared IRQs in the domain. Exposed when flooding IRQs.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1474582419-7053-2-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
The L2 and OCRAM devices have different ecc trigger names than the other
EDAC devices (FIFO peripherals). Make them all the same and remove the
character array from the device structure.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1471622666-15197-2-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Fix the following sparse warning:
drivers/edac/altera_edac.c:1649:23: warning:
symbol 'a10_eccmgr_ic_ops' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Reviewed-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>
Link: http://lkml.kernel.org/r/1470836667-11822-1-git-send-email-weiyj.lk@gmail.com
Signed-off-by: Borislav Petkov <bp@suse.de>
In preparation for additional memory module ECCs, the IRQ function will
check a panic flag before doing a kernel panic on double bit errors.
OCRAM uncorrectable errors cause a panic because sleep/resume functions
and FPGA contents during sleep are stored in OCRAM.
ECCs on peripheral FIFO buffers will not cause a kernel panic on DBERRs
because the packet can be retried and therefore recovered.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1466603939-7526-3-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Separate the device match arrays for each platform to prevent CycloneV
matches when calling of_platform_populate() on the Arria10 ECC manager
node.
If the SDRAM is a child node of ECC manager, call probe function via
of_platform_populate().
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1464193783-5071-4-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
The recently added Arria10 OCRAM ECC support caused some new harmless
warnings about unused functions when it is disabled:
drivers/edac/altera_edac.c:1067:20: error: 'altr_edac_a10_ecc_irq' defined but not used [-Werror=unused-function]
drivers/edac/altera_edac.c:658:12: error: 'altr_check_ecc_deps' defined but not used [-Werror=unused-function]
This rearranges the code slightly to have those two functions inside
of the same #ifdef that hides their callers. It also manages to
avoid a forward declaration of the IRQ handler in the process.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: Alan Tull <atull@opensource.altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Fixes: c7b4be8db8 ("EDAC, altera: Add Arria10 OCRAM ECC support")
Link: http://lkml.kernel.org/r/1460837650-1237650-2-git-send-email-arnd@arndb.de
Signed-off-by: Borislav Petkov <bp@suse.de>
The altera EDAC driver refers to its per-device data
using a cast to '(void *)', which makes the pointer
non-const, though both the source and destination are
actually const.
Removing the annotation makes the reference (almost)
fit into a single line for improved readability, and
ensures that it is actually defined as const.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: Alan Tull <atull@opensource.altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1460837650-1237650-1-git-send-email-arnd@arndb.de
Signed-off-by: Borislav Petkov <bp@suse.de>
Suspend-to-RAM and EDAC support are mutually exclusive on SOCFPGA. If
EDAC is enabled, it will prevent the platform from going into suspend.
The reason is that the IRQ vectors for OCRAM reside on DDR and in
Suspend-to-RAM mode we're executing out of OCRAM. If an ECC error
occurs, we can't handle it so it was decided to make them mutually
exclusive.
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: dinh.linux@gmail.com
Cc: dougthompson@xmission.com
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: mchehab@osg.samsung.com
Cc: tthayer@opensource.altera.com
Link: http://lkml.kernel.org/r/1433512155-9906-1-git-send-email-dinguyen@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This patch adds support for the CycloneV and ArriaV SDRAM controllers.
Correction and reporting of SBEs, Panic on DBEs.
There was a discussion thread on whether this driver should be an mfd driver
or just make use of syscon, which is already a mfd. Ultimately, the
decision to use a simple syscon interface was reached.[1]
[1] https://lkml.org/lkml/2014/7/30/514
[dinguyen] Fixed Kconfig to have EDAC_ALTERA_MC as a tristate to prevent a
build failure for allmodconfig.
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Acked-by: Borislav Petkov <bp@suse.de>
[dinguyen] cleaned up commit message
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
