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Author SHA1 Message Date
Linus Torvalds
7462543abb Two small EDAC fixes.
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Merge tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull two small EDAC fixes from Borislav Petkov.

* tag 'edac_fixes_for_3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC: Don't give write permission to read-only files
  EDAC, mc_sysfs.c: Fix string array pointer types
2013-05-09 10:11:08 -07:00
Srivatsa S. Bhat
c8c64d165c EDAC: Don't give write permission to read-only files
I get the following warning on boot:

------------[ cut here ]------------
WARNING: at drivers/base/core.c:575 device_create_file+0x9a/0xa0()
Hardware name:  -[8737R2A]-
Write permission without 'store'
...
</snip>

Drilling down, this is related to dynamic channel ce_count attribute
files sporting a S_IWUSR mode without a ->store() function. Looking
around, it appears that they aren't supposed to have a ->store()
function. So remove the bogus write permission to get rid of the
warning.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: <stable@vger.kernel.org> # 3.[89]
[ shorten commit message ]
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-05-09 12:40:45 +02:00
Linus Torvalds
e2823299cd Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac
Pull edac fixes from Mauro Carvalho Chehab:
 "Two edac fixes:

   - i7300_edac currently reports a wrong number of DIMMs when the
     memory controller is in single channel mode

   - on some Sandy Bridge machines, the EDAC driver bails out as one of
     the PCI IDs used by the driver is hidden by BIOS.  As the driver
     uses it only to detect the type of memory, make it optional at the
     driver"

* 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac:
  edac: sb_edac.c should not require prescence of IMC_DDRIO device
  i7300_edac: Fix memory detection in single mode
2013-04-30 10:00:49 -07:00
Luck, Tony
de4772c621 edac: sb_edac.c should not require prescence of IMC_DDRIO device
The Sandy Bridge EDAC driver uses a register in the IMC_DDRIO CSR
space to determine the type of DIMMs (registered or unregistered).
But this device does not exist on some single socket Sandy Bridge
servers.  While the type of DIMMs is nice to know, it is not essential
for this driver's other functions. So it seems harsh to have it
refuse to load at all when it cannot find this device.

Make the check for this device be optional. If it isn't present
just report the memory type as "MEM_UNKNOWN".

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-04-29 10:32:40 -03:00
Mauro Carvalho Chehab
33ad41263d i7300_edac: Fix memory detection in single mode
When the machine is on single mode, only branch 0 channel 0
is valid. However, the code is not honouring it:

[ 1952.639341] EDAC DEBUG: i7300_get_mc_regs: Memory controller operating on single mode
...
[ 1952.639351] EDAC DEBUG: i7300_init_csrows: 		AMB-present CH0 = 0x1:
[ 1952.639353] EDAC DEBUG: i7300_init_csrows: 		AMB-present CH1 = 0x0:
[ 1952.639355] EDAC DEBUG: i7300_init_csrows: 		AMB-present CH2 = 0x0:
[ 1952.639358] EDAC DEBUG: i7300_init_csrows: 		AMB-present CH3 = 0x0:
...
[ 1952.639360] EDAC DEBUG: decode_mtr: 	MTR0 CH0: DIMMs are Present (mtr)
[ 1952.639362] EDAC DEBUG: decode_mtr: 		WIDTH: x8
[ 1952.639363] EDAC DEBUG: decode_mtr: 		ELECTRICAL THROTTLING is enabled
[ 1952.639364] EDAC DEBUG: decode_mtr: 		NUMBANK: 4 bank(s)
[ 1952.639366] EDAC DEBUG: decode_mtr: 		NUMRANK: single
[ 1952.639367] EDAC DEBUG: decode_mtr: 		NUMROW: 16,384 - 14 rows
[ 1952.639368] EDAC DEBUG: decode_mtr: 		NUMCOL: 1,024 - 10 columns
[ 1952.639370] EDAC DEBUG: decode_mtr: 		SIZE: 512 MB
[ 1952.639371] EDAC DEBUG: decode_mtr: 		ECC code is 8-byte-over-32-byte SECDED+ code
[ 1952.639373] EDAC DEBUG: decode_mtr: 		Scrub algorithm for x8 is on enhanced mode
[ 1952.639374] EDAC DEBUG: decode_mtr: 	MTR0 CH1: DIMMs are Present (mtr)
[ 1952.639376] EDAC DEBUG: decode_mtr: 		WIDTH: x8
[ 1952.639377] EDAC DEBUG: decode_mtr: 		ELECTRICAL THROTTLING is enabled
[ 1952.639379] EDAC DEBUG: decode_mtr: 		NUMBANK: 4 bank(s)
[ 1952.639380] EDAC DEBUG: decode_mtr: 		NUMRANK: single
[ 1952.639381] EDAC DEBUG: decode_mtr: 		NUMROW: 16,384 - 14 rows
[ 1952.639383] EDAC DEBUG: decode_mtr: 		NUMCOL: 1,024 - 10 columns
[ 1952.639384] EDAC DEBUG: decode_mtr: 		SIZE: 512 MB
[ 1952.639385] EDAC DEBUG: decode_mtr: 		ECC code is 8-byte-over-32-byte SECDED+ code
[ 1952.639387] EDAC DEBUG: decode_mtr: 		Scrub algorithm for x8 is on enhanced mode
...
[ 1952.639449] EDAC DEBUG: print_dimm_size:               channel 0 | channel 1 | channel 2 | channel 3 |
[ 1952.639451] EDAC DEBUG: print_dimm_size: -------------------------------------------------------------
[ 1952.639453] EDAC DEBUG: print_dimm_size: csrow/SLOT 0   512 MB   |  512 MB   |    0 MB   |    0 MB   |
[ 1952.639456] EDAC DEBUG: print_dimm_size: csrow/SLOT 1     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639458] EDAC DEBUG: print_dimm_size: csrow/SLOT 2     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639460] EDAC DEBUG: print_dimm_size: csrow/SLOT 3     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639462] EDAC DEBUG: print_dimm_size: csrow/SLOT 4     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639464] EDAC DEBUG: print_dimm_size: csrow/SLOT 5     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639466] EDAC DEBUG: print_dimm_size: csrow/SLOT 6     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639468] EDAC DEBUG: print_dimm_size: csrow/SLOT 7     0 MB   |    0 MB   |    0 MB   |    0 MB   |
[ 1952.639470] EDAC DEBUG: print_dimm_size: -------------------------------------------------------------

Instead of detecting a single memory at channel 0, it is showing
twice the memory.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-04-29 10:32:39 -03:00
Aravind Gopalakrishnan
94c1acf2c8 amd64_edac: Add Family 16h support
Add code to handle DRAM ECC errors decoding for Fam16h.

Tested on Fam16h with ECC turned on using the mce_amd_inj facility and
works fine.

Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
[ Boris: cleanups and clarifications ]
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-04-19 12:46:50 +02:00
Borislav Petkov
8b7719e08a EDAC, mc_sysfs.c: Fix string array pointer types
Those should be const ptr to a const string, fix them.

Signed-off-by: Borislav Petkov <bp@suse.de>
2013-03-25 15:44:25 +01:00
Mauro Carvalho Chehab
9713faecff EDAC: Merge mci.mem_is_per_rank with mci.csbased
Both mci.mem_is_per_rank and mci.csbased denote the same thing: the
memory controller is csrows based. Merge both fields into one.

There's no need for the driver to actually fill it, as the core detects
it by checking if one of the layers has the csrows type as part of the
memory hierarchy:

	if (layers[i].type == EDAC_MC_LAYER_CHIP_SELECT)
			per_rank = true;

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-03-16 06:32:30 +01:00
Mauro Carvalho Chehab
1eef128254 amd64_edac: Correct DIMM sizes
We were filling the csrow size with a wrong value. 16a528ee39 ("EDAC:
Fix csrow size reported in sysfs") tried to address the issue. It fixed
the report with the old API but not with the new one. Correct it for the
new API too.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[ make it a per-csrow accounting regardless of ->channel_count ]
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-03-16 06:32:02 +01:00
Stephen Hemminger
fbe2d3616c EDAC: Make sysfs functions static
Fixes lots of sparse warnings here.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-03-05 11:33:57 +01:00
Linus Torvalds
ad6c2c2eb3 Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac
Pull EDAC fixes and ghes-edac from Mauro Carvalho Chehab:
 "For:

   - Some fixes at edac drivers (i7core_edac, sb_edac, i3200_edac);
   - error injection support for i5100, when EDAC debug is enabled;
   - fix edac when it is loaded builtin (early init for the subsystem);
   - a "Firmware First" EDAC driver, allowing ghes to report errors via
     EDAC (ghes-edac).

  With regards to ghes-edac, this fixes a longstanding BZ at Red Hat
  that happens with Nehalem and Sandy Bridge CPUs: when both GHES and
  i7core_edac or sb_edac are running, the error reports are
  unpredictable, as both BIOS and OS race to access the registers.  With
  ghes-edac, the EDAC core will refuse to register any other concurrent
  memory error driver.

  This patchset moves the ghes struct definitions to a separate header
  file (include/acpi/ghes.h) and adds 3 hooks at apei/ghes.c to
  register/unregister and to report errors via ghes-edac.  Those changes
  were acked by ghes driver maintainer (Huang)."

* 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac: (30 commits)
  i5100_edac: convert to use simple_open()
  ghes_edac: fix to use list_for_each_entry_safe() when delete list items
  ghes_edac: Fix RAS tracing
  ghes_edac: Make it compliant with UEFI spec 2.3.1
  ghes_edac: Improve driver's printk messages
  ghes_edac: Don't credit the same memory dimm twice
  ghes_edac: do a better job of filling EDAC DIMM info
  ghes_edac: add support for reporting errors via EDAC
  ghes_edac: Register at EDAC core the BIOS report
  ghes: add the needed hooks for EDAC error report
  ghes: move structures/enum to a header file
  edac: add support for error type "Info"
  edac: add support for raw error reports
  edac: reduce stack pressure by using a pre-allocated buffer
  edac: lock module owner to avoid error report conflicts
  edac: remove proc_name from mci structure
  edac: add a new memory layer type
  edac: initialize the core earlier
  edac: better report error conditions in debug mode
  i5100_edac: Remove two checkpatch warnings
  ...
2013-02-28 20:42:33 -08:00
Wei Yongjun
b0769891ba i5100_edac: convert to use simple_open()
This removes an open coded simple_open() function and
replaces file operations references to the function
with simple_open() instead.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-26 10:06:18 -03:00
Wei Yongjun
5dae92a718 ghes_edac: fix to use list_for_each_entry_safe() when delete list items
Since we will remove items off the list using list_del() we need
to use a safe version of the list_for_each_entry() macro aptly named
list_for_each_entry_safe().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-26 10:05:35 -03:00
Mauro Carvalho Chehab
8ae8f50ad8 ghes_edac: Fix RAS tracing
With the current version of CPER, there's no way to associate an
error with the memory error. So, the error location in EDAC
layers is unused.

As CPER has its own idea about memory architectural layers, just
output whatever is there inside the driver's detail at the RAS
tracepoint.

The EDAC location keeps untouched, in the case that, in some future,
we could actually map the error into the dimm labels.

Now, the error message:

[   72.396625] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0
[   72.396627] {1}[Hardware Error]: APEI generic hardware error status
[   72.396628] {1}[Hardware Error]: severity: 2, corrected
[   72.396630] {1}[Hardware Error]: section: 0, severity: 2, corrected
[   72.396632] {1}[Hardware Error]: flags: 0x01
[   72.396634] {1}[Hardware Error]: primary
[   72.396635] {1}[Hardware Error]: section_type: memory error
[   72.396637] {1}[Hardware Error]: error_status: 0x0000000000000400
[   72.396638] {1}[Hardware Error]: node: 3
[   72.396639] {1}[Hardware Error]: card: 0
[   72.396640] {1}[Hardware Error]: module: 0
[   72.396641] {1}[Hardware Error]: device: 0
[   72.396643] {1}[Hardware Error]: error_type: 18, unknown
[   72.396666] EDAC MC0: 1 CE reserved error (18) on unknown label (node:3 card:0 module:0 page:0x0 offset:0x0 grain:0 syndrome:0x0 - status(0x0000000000000400): Storage error in DRAM memory)

Is properly represented on the trace event:

     kworker/0:2-584   [000] ....    72.396657: mc_event: 1 Corrected error: reserved error (18) on unknown label (mc:0 location👎-1:-1 address:0x00000000 grain:1 syndrome:0x00000000 APEI location: node:3 card:0 module:0 status(0x0000000000000400): Storage error in DRAM memory)

Tested on a 4 sockets E5-4650 Sandy Bridge machine.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:17 -03:00
Mauro Carvalho Chehab
689c9cd812 ghes_edac: Make it compliant with UEFI spec 2.3.1
The UEFI spec defines the memory error types ans the bits that
validate each field on the memory error record, at
Appendix N om items N.2.5 (Memory Error Section) and
N.2.11 (Error Status). Make the error description compliant with
it, only showing the valid fields.

The EDAC error log is now properly reporting the error:

[  281.556854] mce: [Hardware Error]: Machine check events logged
[  281.557042] {2}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0
[  281.557044] {2}[Hardware Error]: APEI generic hardware error status
[  281.557046] {2}[Hardware Error]: severity: 2, corrected
[  281.557048] {2}[Hardware Error]: section: 0, severity: 2, corrected
[  281.557050] {2}[Hardware Error]: flags: 0x01
[  281.557052] {2}[Hardware Error]: primary
[  281.557053] {2}[Hardware Error]: section_type: memory error
[  281.557055] {2}[Hardware Error]: error_status: 0x0000000000000400
[  281.557056] {2}[Hardware Error]: node: 3
[  281.557057] {2}[Hardware Error]: card: 0
[  281.557058] {2}[Hardware Error]: module: 1
[  281.557059] {2}[Hardware Error]: device: 0
[  281.557061] {2}[Hardware Error]: error_type: 18, unknown
[  281.557067] EDAC DEBUG: ghes_edac_report_mem_error: error validation_bits: 0x000040b9
[  281.557084] EDAC MC0: 1 CE reserved error (18) on unknown label (node:3 card:0 module:1 page:0x0 offset:0x0 grain:0 syndrome:0x0 - status(0x0000000000000400): Storage error in DRAM memory)

Tested on a 4 CPUs E5-4650 Sandy Bridge machine.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:16 -03:00
Mauro Carvalho Chehab
d2a6856614 ghes_edac: Improve driver's printk messages
Provide a better infrastructure for printk's inside the driver:
	- use edac_dbg() for debug messages;
	- standardize the usage of pr_info();
	- provide warning about the risk of relying on this
	  driver.

While here, changes the size of a fake memory to 1 page. This is
as good or as bad as 1000 pages, but it is easier for userspace to
detect, as I don't expect that any machine implementing GHES would
provide just 1 page available ;)

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Conflicts:
	drivers/edac/ghes_edac.c
2013-02-25 19:42:15 -03:00
Mauro Carvalho Chehab
5ee726db52 ghes_edac: Don't credit the same memory dimm twice
On my tests on a 4xE5-4650 CPU's system, the GHES
EDAC driver is called twice. As the SMBIOS DMI enumeration
call will seek for the entire DIMM sockets in the system, on
this machine, equipped with 128 GB of RAM, the memory is
displayed twice:

          +-----------------------+
          |    mc0    |    mc1    |
----------+-----------------------+
memory45: |  8192 MB  |  8192 MB  |
memory44: |     0 MB  |     0 MB  |
----------+-----------------------+
memory43: |     0 MB  |     0 MB  |
memory42: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory41: |     0 MB  |     0 MB  |
memory40: |     0 MB  |     0 MB  |
----------+-----------------------+
memory39: |  8192 MB  |  8192 MB  |
memory38: |     0 MB  |     0 MB  |
----------+-----------------------+
memory37: |     0 MB  |     0 MB  |
memory36: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory35: |     0 MB  |     0 MB  |
memory34: |     0 MB  |     0 MB  |
----------+-----------------------+
memory33: |  8192 MB  |  8192 MB  |
memory32: |     0 MB  |     0 MB  |
----------+-----------------------+
memory31: |     0 MB  |     0 MB  |
memory30: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory29: |     0 MB  |     0 MB  |
memory28: |     0 MB  |     0 MB  |
----------+-----------------------+
memory27: |  8192 MB  |  8192 MB  |
memory26: |     0 MB  |     0 MB  |
----------+-----------------------+
memory25: |     0 MB  |     0 MB  |
memory24: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory23: |     0 MB  |     0 MB  |
memory22: |     0 MB  |     0 MB  |
----------+-----------------------+
memory21: |  8192 MB  |  8192 MB  |
memory20: |     0 MB  |     0 MB  |
----------+-----------------------+
memory19: |     0 MB  |     0 MB  |
memory18: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory17: |     0 MB  |     0 MB  |
memory16: |     0 MB  |     0 MB  |
----------+-----------------------+
memory15: |  8192 MB  |  8192 MB  |
memory14: |     0 MB  |     0 MB  |
----------+-----------------------+
memory13: |     0 MB  |     0 MB  |
memory12: |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory11: |     0 MB  |     0 MB  |
memory10: |     0 MB  |     0 MB  |
----------+-----------------------+
memory9:  |  8192 MB  |  8192 MB  |
memory8:  |     0 MB  |     0 MB  |
----------+-----------------------+
memory7:  |     0 MB  |     0 MB  |
memory6:  |  8192 MB  |  8192 MB  |
----------+-----------------------+
memory5:  |     0 MB  |     0 MB  |
memory4:  |     0 MB  |     0 MB  |
----------+-----------------------+
memory3:  |  8192 MB  |  8192 MB  |
memory2:  |     0 MB  |     0 MB  |
----------+-----------------------+
memory1:  |     0 MB  |     0 MB  |
memory0:  |  8192 MB  |  8192 MB  |
----------+-----------------------+

Total sum of 256 GB.

As there's no reliable way to credit DIMMS to the right memory
controller, just put everything on memory controller 0 (with should
always exist).

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:14 -03:00
Mauro Carvalho Chehab
32fa1f53c2 ghes_edac: do a better job of filling EDAC DIMM info
Instead of just faking a random value for the DIMM data, get
the information that it is available via DMI table.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:13 -03:00
Mauro Carvalho Chehab
f04c62a703 ghes_edac: add support for reporting errors via EDAC
Now that the EDAC core is capable of just forward the errors via
the userspace API, add a report mechanism for the GHES errors.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:13 -03:00
Mauro Carvalho Chehab
77c5f5d2f2 ghes_edac: Register at EDAC core the BIOS report
Register GHES at EDAC MC core, in order to avoid other
drivers to also handle errors and mangle with error data.

The edac core will warrant that just one driver will be used,
so the first one to register (BIOS first) will be the one that
will be reporting the hardware errors.

For now, the EDAC driver does nothing but to register at the
EDAC core, preventing the hardware-driven mechanism to
interfere with GHES.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-25 19:42:12 -03:00
Linus Torvalds
06991c28f3 Driver core patches for 3.9-rc1
Here is the big driver core merge for 3.9-rc1
 
 There are two major series here, both of which touch lots of drivers all
 over the kernel, and will cause you some merge conflicts:
   - add a new function called devm_ioremap_resource() to properly be
     able to check return values.
   - remove CONFIG_EXPERIMENTAL
 
 If you need me to provide a merged tree to handle these resolutions,
 please let me know.
 
 Other than those patches, there's not much here, some minor fixes and
 updates.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core patches from Greg Kroah-Hartman:
 "Here is the big driver core merge for 3.9-rc1

  There are two major series here, both of which touch lots of drivers
  all over the kernel, and will cause you some merge conflicts:

   - add a new function called devm_ioremap_resource() to properly be
     able to check return values.

   - remove CONFIG_EXPERIMENTAL

  Other than those patches, there's not much here, some minor fixes and
  updates"

Fix up trivial conflicts

* tag 'driver-core-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (221 commits)
  base: memory: fix soft/hard_offline_page permissions
  drivercore: Fix ordering between deferred_probe and exiting initcalls
  backlight: fix class_find_device() arguments
  TTY: mark tty_get_device call with the proper const values
  driver-core: constify data for class_find_device()
  firmware: Ignore abort check when no user-helper is used
  firmware: Reduce ifdef CONFIG_FW_LOADER_USER_HELPER
  firmware: Make user-mode helper optional
  firmware: Refactoring for splitting user-mode helper code
  Driver core: treat unregistered bus_types as having no devices
  watchdog: Convert to devm_ioremap_resource()
  thermal: Convert to devm_ioremap_resource()
  spi: Convert to devm_ioremap_resource()
  power: Convert to devm_ioremap_resource()
  mtd: Convert to devm_ioremap_resource()
  mmc: Convert to devm_ioremap_resource()
  mfd: Convert to devm_ioremap_resource()
  media: Convert to devm_ioremap_resource()
  iommu: Convert to devm_ioremap_resource()
  drm: Convert to devm_ioremap_resource()
  ...
2013-02-21 12:05:51 -08:00
Mauro Carvalho Chehab
e7e248304c edac: add support for raw error reports
That allows APEI GHES driver to report errors directly, using
the EDAC error report API.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 14:16:03 -03:00
Mauro Carvalho Chehab
c7ef764554 edac: reduce stack pressure by using a pre-allocated buffer
The number of variables at the stack is too big.
Reduces the stack usage by using a pre-allocated error
buffer.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 13:48:45 -03:00
Mauro Carvalho Chehab
80cc7d87d5 edac: lock module owner to avoid error report conflicts
APEI GHES and i7core_edac/sb_edac currently can be loaded at
the same time, but those are Highlander modules:
	"There can be only one".

There are two reasons for that:

1) Each driver assumes that it is the only one registering at
   the EDAC core, as it is driver's responsibility to number
   the memory controllers, and all of them start from 0;

2) If BIOS is handling the memory errors, the OS can't also be
   doing it, as one will mangle with the other.

So, we need to add an module owner's lock at the EDAC core,
in order to avoid having two different modules handling memory
errors at the same time. The best way for doing this lock seems
to use the driver's name, as this is unique, and won't require
changes on every driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:38 -03:00
Mauro Carvalho Chehab
c66b5a79a9 edac: add a new memory layer type
There are some cases where the memory controller layout is
completely hidden. This is the case of firmware-driven error
code, like the one provided by GHES. Add a new layer to be
used on such memory error report mechanisms.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:37 -03:00
Mauro Carvalho Chehab
4ab19b06ac edac: initialize the core earlier
In order for it to work with it builtin, the EDAC core should
be initialized earlier, otherwise the ghes_edac driver initializes
before edac_mc_sysfs_init() being called:

...
[    4.998373] EDAC MC0: Giving out device to 'ghes_edac.c' 'ghes_edac': DEV ghes
...
[    4.998373] EDAC MC1: Giving out device to 'ghes_edac.c' 'ghes_edac': DEV ghes
[    6.519495] EDAC MC: Ver: 3.0.0
[    6.523749] EDAC DEBUG: edac_mc_sysfs_init: device mc created

The net result is that no EDAC sysfs nodes will appear.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:36 -03:00
Mauro Carvalho Chehab
3d958823e2 edac: better report error conditions in debug mode
It is hard to find what's wrong without a proper error
report. Improve it, in debug mode.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:35 -03:00
Mauro Carvalho Chehab
59b9796d1e i5100_edac: Remove two checkpatch warnings
The last changeset introduced a few checkpatch warnings:

WARNING: debugfs_remove_recursive(NULL) is safe this check is probably not required
261: FILE: drivers/edac/i5100_edac.c:1207:
+       if (priv->debugfs)
+               debugfs_remove_recursive(priv->debugfs);

WARNING: debugfs_remove(NULL) is safe this check is probably not required
290: FILE: drivers/edac/i5100_edac.c:1250:
+       if (i5100_debugfs)
+               debugfs_remove(i5100_debugfs);

Get rid of them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:34 -03:00
Niklas Söderlund
9cbc6d38f2 i5100_edac: connect fault injection to debugfs node
Create a debugfs direcotry i5100_edac/mcX for each memory controller and
add nodes to control how fault injection is preformed.

After configuring an injection using inject_channel, inject_deviceptr1,
inject_deviceptr2, inject_eccmask1, inject_eccmask2 and inject_hlinesel
trigger the injection by writing anything to inject_enable.

Example of a CE injection:

echo 0 > /sys/kernel/debug/i5100_edac/mc0/inject_channel
echo 1 > /sys/kernel/debug/i5100_edac/mc0/inject_hlinesel
echo 61440 > /sys/kernel/debug/i5100_edac/mc0/inject_eccmask1
echo 1 > /sys/kernel/debug/i5100_edac/mc0/inject_enable

Example of UE injection:

echo 0 > /sys/kernel/debug/i5100_edac/mc0/inject_channel
echo 2 > /sys/kernel/debug/i5100_edac/mc0/inject_hlinesel
echo 65535 > /sys/kernel/debug/i5100_edac/mc0/inject_eccmask1
echo 65535 > /sys/kernel/debug/i5100_edac/mc0/inject_eccmask2
echo 17 > /sys/kernel/debug/i5100_edac/mc0/inject_deviceptr1
echo 0 > /sys/kernel/debug/i5100_edac/mc0/inject_deviceptr2
echo 1 > /sys/kernel/debug/i5100_edac/mc0/inject_enable

Sometimes it is needed to enable the injection more then once (echo to
the inject_enable node) for the injection to happen, I am not sure why.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:34 -03:00
Niklas Söderlund
53ceafd6a2 i5100_edac: add fault injection code
Add fault injection based on information datasheet for i5100, see 1. In
addition to the i5100 datasheet some missing information on injection
functions where found through experimentation and the i7300 datasheet,
see 2.

[1] Intel 5100 Memory Controller Hub Chipset
    Doc.Nr: 318378
    http://www.intel.com/content/dam/doc/datasheet/5100-
    memory-controller-hub-chipset-datasheet.pdf

[2] Intel 7300 Chipset MemoryController Hub (MCH)
    Doc.Nr: 318082
	http://www.intel.com/assets/pdf/datasheet/318082.pdf

Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:33 -03:00
Niklas Söderlund
52608ba205 i5100_edac: probe for device 19 function 0
Probe and store the device handle for the device 19 function 0 during
driver initialization. The device is used during fault injection.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-02-21 11:06:32 -03:00
Mauro Carvalho Chehab
e7100478fa edac: only create sdram_scrub_rate where supported
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>
2013-02-21 11:06:31 -03:00
Mauro Carvalho Chehab
61734e1835 i3200_edac: Fix the logic that detects filled memories
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>
2013-02-21 11:06:31 -03:00
Mauro Carvalho Chehab
5f466cb025 i3200_edac: Add more debug to the driver
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>
2013-02-21 11:06:22 -03:00
Linus Torvalds
55529fa576 EDAC updates for 3.9
Only one: AMD F16h MCE decoding enablement from Jacob Shin.
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Merge tag 'edac_3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull EDAC updates from Borislav Petkov:
 "Mostly AMD's side of EDAC.  It is basically a new family enablement
  stuff: AMD F16h MCE decoding enablement from Jacob Shin.  The rest is
  trivial cleanups."

* tag 'edac_3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  mpc85xx_edac: Fix typo
  EDAC, MCE, AMD: Remove unneeded exports
  EDAC, MCE, AMD: Add MCE decoding support for Family 16h
  EDAC, MCE, AMD: Make MC2 decoding per-family
  amd64_edac: Remove dead code
2013-02-20 11:28:50 -08:00
Mauro Carvalho Chehab
1339730e73 Linux 3.8-rc7
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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()
  ...
2013-02-20 15:45:52 -03:00
Linus Torvalds
f98982ce80 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform changes from Ingo Molnar:

 - Support for the Technologic Systems TS-5500 platform, by Vivien
   Didelot

 - Improved NUMA support on AMD systems:

   Add support for federated systems where multiple memory controllers
   can exist and see each other over multiple PCI domains.  This
   basically means that AMD node ids can be more than 8 now and the code
   handling this is taught to incorporate PCI domain into those IDs.

 - Support for the Goldfish virtual Android emulator, by Jun Nakajima,
   Intel, Google, et al.

 - Misc fixlets.

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Add TS-5500 platform support
  x86/srat: Simplify memory affinity init error handling
  x86/apb/timer: Remove unnecessary "if"
  goldfish: platform device for x86
  amd64_edac: Fix type usage in NB IDs and memory ranges
  amd64_edac: Fix PCI function lookup
  x86, AMD, NB: Use u16 for northbridge IDs in amd_get_nb_id
  x86, AMD, NB: Add multi-domain support
2013-02-19 20:11:07 -08:00
Baruch Siach
e7d2c215e5 mpc85xx_edac: Fix typo
Correct typos.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Cc: Dave Jiang <djiang@mvista.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-02-10 13:28:41 +01:00
Joe Perches
d3d09e1820 EDAC: Fix kcalloc argument order
First number, then size.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-01-30 11:38:25 +01:00
Dan Carpenter
8024c4c0b1 EDAC: Test correct variable in ->store function
We're testing for ->show but calling ->store().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Borislav Petkov <bp@suse.de>
2013-01-30 11:38:11 +01:00
Borislav Petkov
0f08669e86 EDAC, MCE, AMD: Remove unneeded exports
Initially, those strings describing different parts of an MCE message
were shared with amd64_edac and were therefore exported to modules.
However, all except pp_msgs are used only in one place right now so hide
them and make them static.

No functionality change.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-22 22:40:03 +01:00
Jacob Shin
980eec8b20 EDAC, MCE, AMD: Add MCE decoding support for Family 16h
Add MCE decoding logic for AMD Family 16h processors.

Boris:

- drop unneeded uu_msgs export
- exit early in cat_mc1_mce and save us an indentation level

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-22 22:39:58 +01:00
Jacob Shin
4a73d3de63 EDAC, MCE, AMD: Make MC2 decoding per-family
Currently only AMD Family 15h processors have special handling for MC2
errors. Since upcoming Family 16h will also need unique handling, let's
make MC2 handling part of amd_decoder_ops.

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-22 22:39:54 +01:00
Borislav Petkov
acc7fcb400 amd64_edac: Remove dead code
5e2af0c09e ("edac: Don't initialize csrow's first_page & friends when
not needed") removed useless initialization of variables but left in the
functions which did that. They're unused now so drop them.

Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-22 22:39:41 +01:00
Kees Cook
053417a53e drivers/edac: remove depends on CONFIG_EXPERIMENTAL
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17 12:11:26 -08:00
Daniel J Blueman
c7e5301a1b amd64_edac: Fix type usage in NB IDs and memory ranges
Use appropriate types for northbridge IDs and memory ranges. Mark
immutable data const and keep within compilation unit on related
structures.

Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com>
Link: http://lkml.kernel.org/r/1354265060-22956-2-git-send-email-daniel@numascale-asia.com
[Boris: Drop arg change to node_to_amd_nb]
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-10 16:18:00 +01:00
Daniel J Blueman
e2c0bffea2 amd64_edac: Fix PCI function lookup
Fix locating sibling memory controller PCI functions by using the
correct PCI domain and use a northbridge descriptor only if found. We
need to at least warn if it wasn't found so that it gets fixed and we
don't go off with wrong results.

Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com>
Link: http://lkml.kernel.org/r/1354265060-22956-1-git-send-email-daniel@numascale-asia.com
[Boris: remove wrong comment, sanitize code and warn if NB desc lookup fails]
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-10 16:17:59 +01:00
Daniel J Blueman
8b84c8df38 x86, AMD, NB: Use u16 for northbridge IDs in amd_get_nb_id
Change amd_get_nb_id to return u16 to support >255 memory controllers,
and related consistency fixes.

Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com>
Link: http://lkml.kernel.org/r/1353997932-8475-2-git-send-email-daniel@numascale-asia.com
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-10 16:17:58 +01:00
Daniel J Blueman
772c3ff385 x86, AMD, NB: Add multi-domain support
Fix get_node_id to match northbridge IDs from the array of detected
ones, allowing multi-server support such as with Numascale's
NumaConnect, renaming to 'amd_get_node_id' for consistency.

Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com>
Link: http://lkml.kernel.org/r/1353997932-8475-1-git-send-email-daniel@numascale-asia.com
[Boris: shorten lines to fit 80 cols]
Signed-off-by: Borislav Petkov <bp@alien8.de>
2013-01-10 16:17:58 +01:00
Linus Torvalds
57a0c1e2d6 Two error path fixes causing a crash and a Kconfig fix for an issue
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
2013-01-09 08:43:56 -08:00