Currently, sdram_scrub_rate sysfs node is created even if the device
doesn't support get/set the scub rate. Change the logic to only
create this device node when the operation is supported.
Reported-by: Felipe Balbi <balbi@ti.com>
Acked-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
After running a series of tests on an HP DL320, filled with different
memory sizes, it was noticed that, when filled with just one DIMM
on such hardware, the driver wrongly detects twice the memory, and
thinks that both channels 0 and 1 are filled.
It seems to be partially caused by the BIOS and partially by the driver.
The i3200_edac current logic would be working fine if the BIOS were
disabling the unused second channel when just one DIMM is connected,
in order to do power-saving, as recommended on this chipset's datasheet.
However, the BIOS on this particular machine doesn't do it:
[ 16.741421] EDAC DEBUG: how_many_channels: In dual channel mode
[ 16.741424] EDAC DEBUG: how_many_channels: 2 DIMMS per channel enabled
So, the driver were assuming that 2 channels are enabled (well, they are,
but the second is unused).
Combined with that, I found two issues at the logic that creates the
EDAC data, that were failing when the two channels are not equally
filled (AFAICT, that happens only when just 1 DIMM is plugged).
The first one is that a 0 at DRB means that nothing is filled. The
driver's logic, however, do some calculation with that.
The second one is that the logic that fills the DIMM data currently
assumes that both channels are equally filled.
I tested the system already with the current configuration and my
patch and it is now working fine. So, for a 2R single DIMM 2Gb memory
at dimm slot 01 (channel 0), it is now displaying:
[ 16.741406] EDAC DEBUG: i3200_get_drbs: drb[0][0] = 16, drb[1][0] = 0
[ 16.741410] EDAC DEBUG: i3200_get_drbs: drb[0][1] = 32, drb[1][1] = 0
[ 16.741413] EDAC DEBUG: i3200_get_drbs: drb[0][2] = 32, drb[1][2] = 0
[ 16.741416] EDAC DEBUG: i3200_get_drbs: drb[0][3] = 32, drb[1][3] = 0
...
[ 16.741896] EDAC DEBUG: i3200_probe1: csrow 0, channel 0, size = 1024 Mb
[ 16.741899] EDAC DEBUG: i3200_probe1: csrow 1, channel 0, size = 1024 Mb
and the corresponding sysfs nodes are now properly filled.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Currently, it is not possible to know, when debug is enabled,
if the driver is using 2 DIMMS per channel mode or not. It is
not possible to know the values of the drbs registers, used
to identify the memory rank sizes.
Add debug for both, as it helps to track issues on the driver.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Merge tag 'v3.8-rc7' into next
Linux 3.8-rc7
* tag 'v3.8-rc7': (12052 commits)
Linux 3.8-rc7
net: sctp: sctp_endpoint_free: zero out secret key data
net: sctp: sctp_setsockopt_auth_key: use kzfree instead of kfree
atm/iphase: rename fregt_t -> ffreg_t
ARM: 7641/1: memory: fix broken mmap by ensuring TASK_UNMAPPED_BASE is aligned
ARM: DMA mapping: fix bad atomic test
ARM: realview: ensure that we have sufficient IRQs available
ARM: GIC: fix GIC cpumask initialization
net: usb: fix regression from FLAG_NOARP code
l2tp: dont play with skb->truesize
net: sctp: sctp_auth_key_put: use kzfree instead of kfree
netback: correct netbk_tx_err to handle wrap around.
xen/netback: free already allocated memory on failure in xen_netbk_get_requests
xen/netback: don't leak pages on failure in xen_netbk_tx_check_gop.
xen/netback: shutdown the ring if it contains garbage.
drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try
virtio_console: Don't access uninitialized data.
net: qmi_wwan: add more Huawei devices, including E320
net: cdc_ncm: add another Huawei vendor specific device
ipv6/ip6_gre: fix error case handling in ip6gre_tunnel_xmit()
...
which spilled all EDAC suboptions into the 'Device Drivers' menu.
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Merge tag 'edac_fixes_for_3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
Pull EDAC fixes from Borislav Petkov:
"Two error path fixes causing a crash and a Kconfig fix for an issue
which spilled all EDAC suboptions into the 'Device Drivers' menu."
* tag 'edac_fixes_for_3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC: Cleanup device deregistering path
EDAC: Fix EDAC Kconfig menu
EDAC: Fix kernel panic on module unloading
Use device_unregister to replace put_device + device_del for
cleanup, and fix the potential use after free.
Signed-off-by: Lans Zhang <jia.zhang@windriver.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
After f65aad41772f("MIPS: Cavium: Add EDAC support."), when entering
the "Device Drivers" toplevel menu in menuconfig, the suboptions behind
EDAC appeared merged with the rest of the device drivers types. This was
because the menuconfig option EDAC is querying an EDAC_SUPPORT Kconfig
bool which was defined after the menu definition.
When pushing EDAC_SUPPORT up, before the menu definition, the variable
is defined earlier and the above menuconfig artifact doesn't happen.
Drop a useless menuconfig comment while at it.
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Borislav Petkov <bp@alien8.de>
This patch fixes use-after-free and double-free bugs in
edac_mc_sysfs_exit(). mci_pdev has single reference and put_device()
calls mc_attr_release() which calls kfree(). The following
device_del() works with already released memory. An another kfree() in
edac_mc_sysfs_exit() releses the same memory again. Great.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: stable@vger.kernel.org # 3.[67]
Cc: Denis Kirjanov <kirjanov@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Link: http://lkml.kernel.org/r/20121214110310.11019.21098.stgit@zurg
Signed-off-by: Borislav Petkov <bp@alien8.de>
CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.
This change removes the use of __devinit, __devexit_p, and __devexit
from these drivers.
Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Daney <david.daney@cavium.com>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove size from lookup arrays and mark them as const.
Reviewed-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Niklas Söderlund <niso@kth.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
There are no more embedded kobjects in struct mem_ctl_info. Remove a header and
a comment that does not reflect the code anymore.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Pull MIPS updates from Ralf Baechle:
"The MIPS bits for 3.8. This also includes a bunch fixes that were
sitting in the linux-mips.org git tree for a long time. This pull
request contains updates to several OCTEON drivers and the board
support code for BCM47XX, BCM63XX, XLP, XLR, XLS, lantiq, Loongson1B,
updates to the SSB bus support, MIPS kexec code and adds support for
kdump.
When pulling this, there are two expected merge conflicts in
include/linux/bcma/bcma_driver_chipcommon.h which are trivial to
resolve, just remove the conflict markers and keep both alternatives."
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (90 commits)
MIPS: PMC-Sierra Yosemite: Remove support.
VIDEO: Newport Fix console crashes
MIPS: wrppmc: Fix build of PCI code.
MIPS: IP22/IP28: Fix build of EISA code.
MIPS: RB532: Fix build of prom code.
MIPS: PowerTV: Fix build.
MIPS: IP27: Correct fucked grammar in ops-bridge.c
MIPS: Highmem: Fix build error if CONFIG_DEBUG_HIGHMEM is disabled
MIPS: Fix potencial corruption
MIPS: Fix for warning from FPU emulation code
MIPS: Handle COP3 Unusable exception as COP1X for FP emulation
MIPS: Fix poweroff failure when HOTPLUG_CPU configured.
MIPS: MT: Fix build with CONFIG_UIDGID_STRICT_TYPE_CHECKS=y
MIPS: Remove unused smvp.h
MIPS/EDAC: Improve OCTEON EDAC support.
MIPS: OCTEON: Add definitions for OCTEON memory contoller registers.
MIPS: OCTEON: Add OCTEON family definitions to octeon-model.h
ata: pata_octeon_cf: Use correct byte order for DMA in when built little-endian.
MIPS/OCTEON/ata: Convert pata_octeon_cf.c to use device tree.
MIPS: Remove usage of CEVT_R4K_LIB config option.
...
Some initialization errors are reported with the existing OCTEON EDAC
support patch. Also some parts have more than one memory controller.
Fix the errors and add multiple controllers if present.
Signed-off-by: David Daney <david.daney@cavium.com>
Drivers for EDAC on Cavium. Supported subsystems are:
o CPU primary caches. These are parity protected only, so only error
reporting.
o Second level cache - ECC protected, provides SECDED.
o Memory: ECC / SECDEC if used with suitable DRAM modules. The driver will
will only initialize if ECC is enabled on a system so is safe to run on
non-ECC memory.
o PCI: Parity error reporting
Since it is very hard to test this sort of code the implementation is very
conservative and uses polling where possible for now.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Borislav Petkov <borislav.petkov@amd.com>
Pull EDAC fixes from Borislav Petkov:
- EDAC core error path fix, from Denis Kirjanov.
- Generalization of AMD MCE bank names and some minor error reporting
improvements.
- EDAC core cleanups and simplifications, from Wei Yongjun.
- amd64_edac fixes for sysfs-reported values, from Josh Hunt.
- some heavy amd64_edac error reporting path shaving, leading to
removing a bunch of code.
- amd64_edac error injection method improvements.
- EDAC core cleanups and fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (24 commits)
EDAC, pci_sysfs: Use for_each_pci_dev to simplify the code
EDAC: Handle error path in edac_mc_sysfs_init() properly
MCE, AMD: Dump error status
MCE, AMD: Report decoded error type first
MCE, AMD: Dump CPU f/m/s triple with the error
MCE, AMD: Remove functional unit references
EDAC: Convert to use simple_open()
EDAC, Calxeda highbank: Convert to use simple_open()
EDAC: Fix mc size reported in sysfs
EDAC: Fix csrow size reported in sysfs
EDAC: Pass mci parent
EDAC: Add memory controller flags
amd64_edac: Fix csrows size and pages computation
amd64_edac: Use DBAM_DIMM macro
amd64_edac: Fix K8 chip select reporting
amd64_edac: Reorganize error reporting path
amd64_edac: Do not check whether error address is valid
amd64_edac: Improve error injection
amd64_edac: Cleanup error injection code
amd64_edac: Small fixlets and cleanups
...
Use for_each_pci_dev to simplify the code.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
[Boris: cleanup comments and drop loop brackets]
Signed-off-by: Borislav Petkov <bp@alien8.de>
It is very useful to have the family/model/stepping with the reported
error so dump it. This saves us asking the bug reporter about it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Having the functional unit names in each bank decode is only misleading
as this code supports multiple families and there's no guarantee the
mapping between FUs and MCE banks will stay the same.
And also, knowing the functional unit name doesn't help much since you
end up looking at the respective BKDG anyway.
So drop all FU references and use the MC bank numbers instead.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This removes an open coded simple_open() function and replaces file
operations references to the function with simple_open() instead.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This removes an open coded simple_open() function and replaces file
operations references to the function with simple_open() instead.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This is the complement to previous commit "EDAC: Fix csrow size
reported in sysfs". This fixes the memory controller size reporting on
csrow-based memory controllers. The csrow size is already combined for
both channels. Without this patch memory size is reported doubled.
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
On csrow-based memory controllers, we combine the csrow size from both
channels and there's no need to do that again in csrow_size_show which
leads to double the size of a csrow.
Fix it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Make sure code pays attention to K8 having only one DCT, reformat and
cleanup code, correct debug messages, remove unused code.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Instead of open-coding it, use the DBAM_DIMM macro in
amd64_csrow_nr_pages() which we have already.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This basically reverts 603adaf6b3 ("amd64_edac: fix K8 chip select
reporting") because it was a clumsy workaround for DIMM sizes reporting
on K8 which got superceded by a much more correct one with 41d8bfaba7
("amd64_edac: Improve DRAM address mapping") without removing the prior
one. Remove it now finally.
Reported-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Rewrite CE/UE paths so that they use the same code and drop additional
code duplication in handle_ue. Add a struct err_info which collects
required info for the error reporting. This, in turn, helps slimming all
edac_mc_handle_error() calls down to one.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
All families report a valid error address when encountering a DRAM ECC
error so no need to check it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
When injecting DRAM ECC errors over the F3xB[8,C] interface, the machine
does this by injecting the error in the next non-cached access. This
takes relatively long time on a normal system so that in order for us to
expedite it, we disable the caches around the injection.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Invert kstrtoul return value testing and win one indentation level.
Also, shorten up macro names so that the lines can fit into 80 cols. No
functional change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
amd64_get_dram_hole_info: remove local variable 'base'.
sys_addr_to_dram_addr: do not clear local variable 'ret'. Also, sanitize
constants formatting.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
A reported error could look like this
[ 226.178315] EDAC MC0: 1 CE on mc#0csrow#0channel#0 (csrow:0 channel:0 page:0x427c0d offset:0xde0 grain:0 syndrome:0x1c6)
with two spaces back-to-back due to the msg argument of
edac_mc_handle_error being passed on empty by the specific drivers.
Handle that.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The tracepoint decodes the error type later anyway so remove a useless
assignment to the temporary p which gets overwritten later anyway.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Only levels [0:4] are allowed so enforce that. Also, while at it,
massage Kconfig text and add valid debug levels range to the module
parameter description.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Currently, we unconditionally enable PCI polling and we don't look at
the edac_op_state module parameter. Make this dependent on the parameter
setting supplied on the command line.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The i7core_edac addrmatch_dev and chancounts_dev have sysfs files
associated with them. The sysfs files, however, are coded so that the
parent device is is the mci device. This is incorrect and the mci struct
should be obtained through the addrmatch_dev and chancounts_dev device's
private data field which is populated in i7core_create_sysfs_devices().
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* Right-shift the values in GET_FBD_FAT_IDX and GET_FBD_NF_IDX, so
that the callers get the result they expect.
* Fix definition of FERR_FAT_FBD_ERR_MASK.
* Call GET_FBD_NF_IDX, not GET_FBD_FAT_IDX, when operating on
register FERR_NF_FBD. We were lucky they have the same definition.
This fixes kernel bug #44131:
https://bugzilla.kernel.org/show_bug.cgi?id=44131
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The driver is currently filling data in a wrong way, on drivers
for csrows-based memory controller, when the first layer is a
csrow.
This is not easily to notice, as, in general, memories are
filed in dual, interleaved, symetric mode, as very few memory
controllers support asymetric modes.
While digging into a bug for i82795_edac driver, the asymetric
mode there is now working, allowing us to fill the machine with
4x1GB ranks at channel 0, and 2x512GB at channel 1:
Channel 0 ranks:
EDAC DEBUG: i82975x_init_csrows: DIMM A0: from page 0x00000000 to 0x0003ffff (size: 0x00040000 pages)
EDAC DEBUG: i82975x_init_csrows: DIMM A1: from page 0x00040000 to 0x0007ffff (size: 0x00040000 pages)
EDAC DEBUG: i82975x_init_csrows: DIMM A2: from page 0x00080000 to 0x000bffff (size: 0x00040000 pages)
EDAC DEBUG: i82975x_init_csrows: DIMM A3: from page 0x000c0000 to 0x000fffff (size: 0x00040000 pages)
Channel 1 ranks:
EDAC DEBUG: i82975x_init_csrows: DIMM B0: from page 0x00100000 to 0x0011ffff (size: 0x00020000 pages)
EDAC DEBUG: i82975x_init_csrows: DIMM B1: from page 0x00120000 to 0x0013ffff (size: 0x00020000 pages)
Instead of properly showing the memories as such, before this patch, it
shows the memory layout as:
+-----------------------------------+
| mc0 |
| csrow0 | csrow1 | csrow2 |
----------+-----------------------------------+
channel1: | 1024 MB | 1024 MB | 512 MB |
channel0: | 1024 MB | 1024 MB | 512 MB |
----------+-----------------------------------+
as if both channels were symetric, grouping the DIMMs on a wrong
layout.
After this patch, the memory is correctly represented.
So, for csrows at layers[0], it shows:
+-----------------------------------------------+
| mc0 |
| csrow0 | csrow1 | csrow2 | csrow3 |
----------+-----------------------------------------------+
channel1: | 512 MB | 512 MB | 0 MB | 0 MB |
channel0: | 1024 MB | 1024 MB | 1024 MB | 1024 MB |
----------+-----------------------------------------------+
For csrows at layers[1], it shows:
+-----------------------+
| mc0 |
| channel0 | channel1 |
--------+-----------------------+
csrow3: | 1024 MB | 0 MB |
csrow2: | 1024 MB | 0 MB |
--------+-----------------------+
csrow1: | 1024 MB | 512 MB |
csrow0: | 1024 MB | 512 MB |
--------+-----------------------+
So, no matter of what comes first, the information between
channel and csrow will be properly represented.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
If none of the elements in scrubrates[] matches, this loop will cause
__amd64_set_scrub_rate() to incorrectly use the n+1th element.
As the function is designed to use the final scrubrates[] element in the
case of no match, we can fix this bug by simply terminating the array
search at the n-1th element.
Boris: this code is fragile anyway, see here why:
http://marc.info/?l=linux-kernel&m=135102834131236&w=2
It will be rewritten more robustly soonish.
Reported-by: Denis Kirjanov <kirjanov@gmail.com>
Cc: stable@vger.kernel.org
Cc: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Mauro Carvalho Chehab