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2012-06-27edac i5000, i5400: fix pointer math in i5000_get_mc_regs()Dan Carpenter
"pvt->ambase" is a u64 datatype. The intent here is to fill the first half in the first call to pci_read_config_dword() and the other half in the second. Unfortunately the pointer math is wrong so we set the wrong data. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-27edac: allow specifying the error count with fake_injectMauro Carvalho Chehab
In order to test if the error counters are properly incremented, add a way to specify how many errors were generated by a trace. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-27edac: add support for Calxeda highbank L2 cache eccRob Herring
Add support for L2 ECC on Calxeda highbank platform. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-27edac: add support for Calxeda highbank memory controllerRob Herring
Add support for memory controller on Calxeda Highbank platforms. Highbank platforms support a single 4GB mini-DIMM with 1-bit correction and 2-bit detection. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-12edac: create top-level debugfs directoryRob Herring
Create a single, top-level "edac" directory for debugfs. An "mc[0-N]" directory is then created for each memory controller. Individual drivers can create additional entries such as h/w error injection control. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-12sb_edac: properly handle error countMauro Carvalho Chehab
Instead of reporting the error count via driver-specific details, use the new way provided by edac_mc_handle_error. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-12i7core_edac: properly handle error countMauro Carvalho Chehab
Instead of generating a burst of errors or reporting the error count via driver-specific details, use the new way provided by edac_mc_handle_error. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-12edac: edac_mc_handle_error(): add an error_count parameterMauro Carvalho Chehab
In order to avoid loosing error events, it is desirable to group error events together and generate a single trace for several identical errors. The trace API already allows reporting multiple errors. Change the handle_error function to also allow that. The changes at the drivers were made by this small script: $file .=$_ while (<>); $file =~ s/(edac_mc_handle_error)\s*\(([^\,]+)\,([^\,]+)\,/$1($2,$3, 1,/g; print $file; Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: remove arch-specific parameter for the error handlerMauro Carvalho Chehab
Remove the arch-dependent parameter, as it were not used, as the MCE tracepoint weren't implemented. It probably doesn't make sense to have an MCE-specific tracepoint, as this will cost more bytes at the tracepoint, and tracepoint is not free. The changes at the EDAC drivers were done by this small perl script: $file .=$_ while (<>); $file =~ s/(edac_mc_handle_error)\s*\(([^\;]+)\,([^\,\)]+)\s*\)/$1($2)/g; print $file; Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11amd64_edac: Don't pass driver name as an error parameterMauro Carvalho Chehab
The EDAC driver name doesn't help to handle EDAC errors. So, remove it from the EDAC error messages, preserving only the error_message. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac_mc: check for allocation failure in edac_mc_alloc()Dan Carpenter
Add a check here for if kzalloc() failed. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Increase version to 3.0.0Mauro Carvalho Chehab
There were lots of changes introduced to justify renaming it to 3.0.0: - EDAC core were redesigned to represent all types of memory controllers; - EDAC API were redesigned to properly represent the memory controller hierarchy; - a tracepoint-based API were added to report memory errors. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac_mc: Cleanup per-dimm_info debug messagesMauro Carvalho Chehab
The edac_mc_alloc() routine allocates one dimm_info device for all possible memories, including the non-filled ones. The debug messages there are somewhat confusing. So, cleans them, by moving the code that prints the memory location to edac_mc, and using it on both edac_mc_sysfs and edac_mc. Also, only dumps information when DIMM/ranks are actually filled. After this patch, a dimm-based memory controller will print the debug info as: [ 1011.380027] EDAC DEBUG: edac_mc_dump_csrow: csrow->csrow_idx = 0 [ 1011.380029] EDAC DEBUG: edac_mc_dump_csrow: csrow = ffff8801169be000 [ 1011.380031] EDAC DEBUG: edac_mc_dump_csrow: csrow->first_page = 0x0 [ 1011.380032] EDAC DEBUG: edac_mc_dump_csrow: csrow->last_page = 0x0 [ 1011.380034] EDAC DEBUG: edac_mc_dump_csrow: csrow->page_mask = 0x0 [ 1011.380035] EDAC DEBUG: edac_mc_dump_csrow: csrow->nr_channels = 3 [ 1011.380037] EDAC DEBUG: edac_mc_dump_csrow: csrow->channels = ffff8801149c2840 [ 1011.380039] EDAC DEBUG: edac_mc_dump_csrow: csrow->mci = ffff880117426000 [ 1011.380041] EDAC DEBUG: edac_mc_dump_channel: channel->chan_idx = 0 [ 1011.380042] EDAC DEBUG: edac_mc_dump_channel: channel = ffff8801149c2860 [ 1011.380044] EDAC DEBUG: edac_mc_dump_channel: channel->csrow = ffff8801169be000 [ 1011.380046] EDAC DEBUG: edac_mc_dump_channel: channel->dimm = ffff88010fe90400 ... [ 1011.380095] EDAC DEBUG: edac_mc_dump_dimm: dimm0: channel 0 slot 0 mapped as virtual row 0, chan 0 [ 1011.380097] EDAC DEBUG: edac_mc_dump_dimm: dimm = ffff88010fe90400 [ 1011.380099] EDAC DEBUG: edac_mc_dump_dimm: dimm->label = 'CPU#0Channel#0_DIMM#0' [ 1011.380101] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000 [ 1011.380103] EDAC DEBUG: edac_mc_dump_dimm: dimm->grain = 8 [ 1011.380104] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000 ... (a rank-based memory controller would print, instead of "dimm?", "rank?" on the above debug info) Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Convert debugfX to edac_dbg(X,Joe Perches
Use a more common debugging style. Remove __FILE__ uses, add missing newlines, coalesce formats and align arguments. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Use more normal debugging macro styleJoe Perches
Convert macros to a simpler style and enforce appropriate format checking when not CONFIG_EDAC_DEBUG. Use fmt and __VA_ARGS__, neaten macros. Move some string arrays to the debugfx uses and remove the now unnecessary CONFIG_EDAC_DEBUG variable block definitions. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Don't add __func__ or __FILE__ for debugf[0-9] msgsMauro Carvalho Chehab
The debug macro already adds that. Most of the work here was made by this small script: $f .=$_ while (<>); $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*": /\1"/g; $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*/\1/g; $f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*"MC: /\1"/g; $f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g; $f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g; $f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g; $f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g; $f =~ s/\"MC\: \\n\"/"MC:\\n"/g; print $f; After running the script, manual cleanups were done to fix it the remaining places. While here, removed the __LINE__ on most places, as it doesn't actually give useful info on most places. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11i7core_edac: change the mem allocation scheme to make ↵Mauro Carvalho Chehab
Documentation/kobject.txt happy Kernel kobjects have rigid rules: each container object should be dynamically allocated, and can't be allocated into a single kmalloc. EDAC never obeyed this rule: it has a single malloc function that allocates all needed data into a single kzalloc. As this is not accepted anymore, change the allocation schema of the EDAC *_info structs to enforce this Kernel standard. Cc: Aristeu Rozanski <arozansk@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: change the mem allocation scheme to make Documentation/kobject.txt happyMauro Carvalho Chehab
Kernel kobjects have rigid rules: each container object should be dynamically allocated, and can't be allocated into a single kmalloc. EDAC never obeyed this rule: it has a single malloc function that allocates all needed data into a single kzalloc. As this is not accepted anymore, change the allocation schema of the EDAC *_info structs to enforce this Kernel standard. Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Greg K H <gregkh@linuxfoundation.org> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Mark Gross <mark.gross@intel.com> Cc: Tim Small <tim@buttersideup.com> Cc: Ranganathan Desikan <ravi@jetztechnologies.com> Cc: "Arvind R." <arvino55@gmail.com> Cc: Olof Johansson <olof@lixom.net> Cc: Egor Martovetsky <egor@pasemi.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Hitoshi Mitake <h.mitake@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Shaohui Xie <Shaohui.Xie@freescale.com> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Only expose csrows/channels on legacy API if they're populatedMauro Carvalho Chehab
This patch actually fixes a bug with the legacy API, where, at the same csrow, some channels may have different DIMMs. This can happen on FB-DIMM/RAMBUS and modern Intel controllers. This is the case, for example, of Nehalem machines: $ ./edac-ctl --layout +-----------------------------------+ | mc0 | | channel0 | channel1 | channel2 | -------+-----------------------------------+ slot2: | 0 MB | 0 MB | 0 MB | slot1: | 1024 MB | 0 MB | 0 MB | slot0: | 1024 MB | 1024 MB | 1024 MB | -------+-----------------------------------+ Before this patch, non-filled memories were shown. Now, only what's filled is there: grep . /sys/devices/system/edac/mc/mc0/csrow*/ch?* /sys/devices/system/edac/mc/mc0/csrow0/ch0_ce_count:0 /sys/devices/system/edac/mc/mc0/csrow0/ch0_dimm_label:CPU#0Channel#0_DIMM#0 /sys/devices/system/edac/mc/mc0/csrow0/ch1_ce_count:0 /sys/devices/system/edac/mc/mc0/csrow0/ch1_dimm_label:CPU#0Channel#0_DIMM#1 /sys/devices/system/edac/mc/mc0/csrow1/ch0_ce_count:0 /sys/devices/system/edac/mc/mc0/csrow1/ch0_dimm_label:CPU#0Channel#1_DIMM#0 /sys/devices/system/edac/mc/mc0/csrow2/ch0_ce_count:0 /sys/devices/system/edac/mc/mc0/csrow2/ch0_dimm_label:CPU#0Channel#2_DIMM#0 Thanks-to: Aristeu Rozanski Filho <arozansk@redhat.com> Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Move grain/dtype/edac_type calculus to be out of channel loopMauro Carvalho Chehab
The 3e7bddc changeset (edac: move dimm properties to struct memset_info) moved the calculus inside a loop. However, at those stuff are common to all channels, on several drivers, it is better to put the calculus outside the loop, to optimize the code. Reported-by: Aristeu Rozanski Filho <arozansk@redhat.com> Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Mark Gross <mark.gross@intel.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Add debufs nodes to allow doing fake error injectMauro Carvalho Chehab
Sometimes, it is useful to have a mechanism that generates fake errors, in order to test the EDAC core code, and the userspace tools. Provide such mechanism by adding a few debugfs nodes. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: add a sysfs node to report the maximum location for the systemMauro Carvalho Chehab
The userspace tools need to know what's the maximum location on each system, as it helps to create nice maps showing how the memory was filled at the system. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: add a new per-dimm API and make the old per-virtual-rank API obsoleteMauro Carvalho Chehab
The old EDAC API is broken. It only works fine for systems manufatured before 2005 and for AMD 64. The reason is that it forces all memory controller drivers to discover rank info. Also, it doesn't allow grouping the several ranks into a DIMM. So, what almost all modern drivers do is to create a fake virtual-rank information, and use it to cheat the EDAC core to accept the driver. While this works if the user has enough time to discover what DIMM slot corresponds to each "virtual-rank" information, it prevents EDAC usage for users with less available time. It also makes life hard for vendors that may want to provide a table with their motherboards to the userspace tool (edac-utils) as each driver has its own logic for the virtual mapping. So, the old API should be removed, in favor of a more flexible API that allows newer drivers to not lie to the EDAC core. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Josh Boyer <jwboyer@redhat.com> Cc: Hui Wang <jason77.wang@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Get rid of the old kobj's from the edac mc codeMauro Carvalho Chehab
Now that al users for the old kobj raw access are gone, we can get rid of the legacy kobj-based structures and data. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11i7core_edac: convert it to use struct deviceMauro Carvalho Chehab
Instead of relying on a complex logic inside the edac core to create a "device tree-like" sysfs struct, just use device_add. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11amd64_edac: convert sysfs logic to use struct deviceMauro Carvalho Chehab
Now that the EDAC core supports struct device, there's no sense on having any logic at the EDAC core to simulate it. So, instead of adding such logic there, change the logic at amd64_edac to use it. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11mpc85xx_edac: convert sysfs logic to use struct deviceMauro Carvalho Chehab
Now that the EDAC core supports struct device, there's no sense on having any logic at the EDAC core to simulate it. So, instead of adding such logic there, change the logic at mpc85xx_edac to use it compile-tested only. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Shaohui Xie <Shaohui.Xie@freescale.com> Cc: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: rewrite the sysfs code to use struct deviceMauro Carvalho Chehab
The EDAC subsystem uses the old struct sysdev approach, creating all nodes using the raw sysfs API. This is bad, as the API is deprecated. As we'll be changing the EDAC API, let's first port the existing code to struct device. There's one drawback on this patch: driver-specific sysfs nodes, used by mpc85xx_edac, amd64_edac and i7core_edac won't be created anymore. While it would be possible to also port the device-specific code, that would mix kobj with struct device, with is not recommended. Also, it is easier and nicer to move the code to the drivers, instead, as the core can get rid of some complex logic that just emulates what the device_add() and device_create_file() already does. The next patches will convert the driver-specific code to use the device-specific calls. Then, the remaining bits of the old sysfs API will be removed. NOTE: a per-MC bus is required, otherwise devices with more than one memory controller will hit a bug like the one below: [ 819.094946] EDAC DEBUG: find_mci_by_dev: find_mci_by_dev() [ 819.094948] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device() idx=1 [ 819.094952] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device(): creating device mc1 [ 819.094967] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device creating dimm0, located at channel 0 slot 0 [ 819.094984] ------------[ cut here ]------------ [ 819.100142] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xc1/0xf0() [ 819.107282] Hardware name: S2600CP [ 819.111078] sysfs: cannot create duplicate filename '/bus/edac/devices/dimm0' [ 819.119062] Modules linked in: sb_edac(+) edac_core ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge stp llc sunrpc binfmt_misc dm_mirror dm_region_hash dm_log vhost_net macvtap macvlan tun kvm microcode pcspkr iTCO_wdt iTCO_vendor_support igb i2c_i801 i2c_core sg ioatdma dca sr_mod cdrom sd_mod crc_t10dif ahci libahci isci libsas libata scsi_transport_sas scsi_mod wmi dm_mod [last unloaded: scsi_wait_scan] [ 819.175748] Pid: 10902, comm: modprobe Not tainted 3.3.0-0.11.el7.v12.2.x86_64 #1 [ 819.184113] Call Trace: [ 819.186868] [<ffffffff8105adaf>] warn_slowpath_common+0x7f/0xc0 [ 819.193573] [<ffffffff8105aea6>] warn_slowpath_fmt+0x46/0x50 [ 819.200000] [<ffffffff811f53d1>] sysfs_add_one+0xc1/0xf0 [ 819.206025] [<ffffffff811f5cf5>] sysfs_do_create_link+0x135/0x220 [ 819.212944] [<ffffffff811f7023>] ? sysfs_create_group+0x13/0x20 [ 819.219656] [<ffffffff811f5df3>] sysfs_create_link+0x13/0x20 [ 819.226109] [<ffffffff813b04f6>] bus_add_device+0xe6/0x1b0 [ 819.232350] [<ffffffff813ae7cb>] device_add+0x2db/0x460 [ 819.238300] [<ffffffffa0325634>] edac_create_dimm_object+0x84/0xf0 [edac_core] [ 819.246460] [<ffffffffa0325e18>] edac_create_sysfs_mci_device+0xe8/0x290 [edac_core] [ 819.255215] [<ffffffffa0322e2a>] edac_mc_add_mc+0x5a/0x2c0 [edac_core] [ 819.262611] [<ffffffffa03412df>] sbridge_register_mci+0x1bc/0x279 [sb_edac] [ 819.270493] [<ffffffffa03417a3>] sbridge_probe+0xef/0x175 [sb_edac] [ 819.277630] [<ffffffff813ba4e8>] ? pm_runtime_enable+0x58/0x90 [ 819.284268] [<ffffffff812f430c>] local_pci_probe+0x5c/0xd0 [ 819.290508] [<ffffffff812f5ba1>] __pci_device_probe+0xf1/0x100 [ 819.297117] [<ffffffff812f5bea>] pci_device_probe+0x3a/0x60 [ 819.303457] [<ffffffff813b1003>] really_probe+0x73/0x270 [ 819.309496] [<ffffffff813b138e>] driver_probe_device+0x4e/0xb0 [ 819.316104] [<ffffffff813b149b>] __driver_attach+0xab/0xb0 [ 819.322337] [<ffffffff813b13f0>] ? driver_probe_device+0xb0/0xb0 [ 819.329151] [<ffffffff813af5d6>] bus_for_each_dev+0x56/0x90 [ 819.335489] [<ffffffff813b0d7e>] driver_attach+0x1e/0x20 [ 819.341534] [<ffffffff813b0980>] bus_add_driver+0x1b0/0x2a0 [ 819.347884] [<ffffffffa0347000>] ? 0xffffffffa0346fff [ 819.353641] [<ffffffff813b19f6>] driver_register+0x76/0x140 [ 819.359980] [<ffffffff8159f18b>] ? printk+0x51/0x53 [ 819.365524] [<ffffffffa0347000>] ? 0xffffffffa0346fff [ 819.371291] [<ffffffff812f5896>] __pci_register_driver+0x56/0xd0 [ 819.378096] [<ffffffffa0347054>] sbridge_init+0x54/0x1000 [sb_edac] [ 819.385231] [<ffffffff8100203f>] do_one_initcall+0x3f/0x170 [ 819.391577] [<ffffffff810bcd2e>] sys_init_module+0xbe/0x230 [ 819.397926] [<ffffffff815bb529>] system_call_fastpath+0x16/0x1b [ 819.404633] ---[ end trace 1654fdd39556689f ]--- This happens because the bus is not being properly initialized. Instead of putting the memory sub-devices inside the memory controller, it is putting everything under the same directory: $ tree /sys/bus/edac/ /sys/bus/edac/ ├── devices │ ├── all_channel_counts -> ../../../devices/system/edac/mc/mc0/all_channel_counts │ ├── csrow0 -> ../../../devices/system/edac/mc/mc0/csrow0 │ ├── csrow1 -> ../../../devices/system/edac/mc/mc0/csrow1 │ ├── csrow2 -> ../../../devices/system/edac/mc/mc0/csrow2 │ ├── dimm0 -> ../../../devices/system/edac/mc/mc0/dimm0 │ ├── dimm1 -> ../../../devices/system/edac/mc/mc0/dimm1 │ ├── dimm3 -> ../../../devices/system/edac/mc/mc0/dimm3 │ ├── dimm6 -> ../../../devices/system/edac/mc/mc0/dimm6 │ ├── inject_addrmatch -> ../../../devices/system/edac/mc/mc0/inject_addrmatch │ ├── mc -> ../../../devices/system/edac/mc │ └── mc0 -> ../../../devices/system/edac/mc/mc0 ├── drivers ├── drivers_autoprobe ├── drivers_probe └── uevent On a multi-memory controller system, the names "csrow%d" and "dimm%d" should be under "mc%d", and not at the main hierarchy level. So, we need to create a per-MC bus, in order to have its own namespace. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Greg K H <gregkh@linuxfoundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11edac: Rename the parent dev to pdevMauro Carvalho Chehab
As EDAC doesn't use struct device itself, it created a parent dev pointer called as "pdev". Now that we'll be converting it to use struct device, instead of struct devsys, this needs to be fixed. No functional changes. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Mark Gross <mark.gross@intel.com> Cc: Jason Uhlenkott <juhlenko@akamai.com> Cc: Tim Small <tim@buttersideup.com> Cc: Ranganathan Desikan <ravi@jetztechnologies.com> Cc: "Arvind R." <arvino55@gmail.com> Cc: Olof Johansson <olof@lixom.net> Cc: Egor Martovetsky <egor@pasemi.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joe Perches <joe@perches.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Hitoshi Mitake <h.mitake@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com> Cc: Shaohui Xie <Shaohui.Xie@freescale.com> Cc: Josh Boyer <jwboyer@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-06-11RAS: Add a tracepoint for reporting memory controller eventsMauro Carvalho Chehab
Add a new tracepoint-based hardware events report method for reporting Memory Controller events. Part of the description bellow is shamelessly copied from Tony Luck's notes about the Hardware Error BoF during LPC 2010 [1]. Tony, thanks for your notes and discussions to generate the h/w error reporting requirements. [1] http://lwn.net/Articles/416669/ We have several subsystems & methods for reporting hardware errors: 1) EDAC ("Error Detection and Correction"). In its original form this consisted of a platform specific driver that read topology information and error counts from chipset registers and reported the results via a sysfs interface. 2) mcelog - x86 specific decoding of machine check bank registers reporting in binary form via /dev/mcelog. Recent additions make use of the APEI extensions that were documented in version 4.0a of the ACPI specification to acquire more information about errors without having to rely reading chipset registers directly. A user level programs decodes into somewhat human readable format. 3) drivers/edac/mce_amd.c - this driver hooks into the mcelog path and decodes errors reported via machine check bank registers in AMD processors to the console log using printk(); Each of these mechanisms has a band of followers ... and none of them appear to meet all the needs of all users. As part of a RAS subsystem, let's encapsulate the memory error hardware events into a trace facility. The tracepoint printk will be displayed like: mc_event: [quant] (Corrected|Uncorrected|Fatal) error:[error msg] on [label] ([location] [edac_mc detail] [driver_detail] Where: [quant] is the quantity of errors [error msg] is the driver-specific error message (e. g. "memory read", "bus error", ...); [location] is the location in terms of memory controller and branch/channel/slot, channel/slot or csrow/channel; [label] is the memory stick label; [edac_mc detail] describes the address location of the error and the syndrome; [driver detail] is driver-specifig error message details, when needed/provided (e. g. "area:DMA", ...) For example: mc_event: 1 Corrected error:memory read on memory stick DIMM_1A (mc:0 location:0:0:0 page:0x586b6e offset:0xa66 grain:32 syndrome:0x0 area:DMA) Of course, any userspace tools meant to handle errors should not parse the above data. They should, instead, use the binary fields provided by the tracepoint, mapping them directly into their Management Information Base. NOTE: The original patch was providing an additional mechanism for MCA-based trace events that also contained MCA error register data. However, as no agreement was reached so far for the MCA-based trace events, for now, let's add events only for memory errors. A latter patch is planned to change the tracepoint, for those types of event. Cc: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i7core: fix ranks information at the per-channel structMauro Carvalho Chehab
There is a flag at the per-channel struct that indicates if there are any 4R dimm on it. The way the presence of this flag were reported is not ok, as it might give the false idea that the channel were filled with 2R memories: [ 580.588701] EDAC DEBUG: get_dimm_config: Ch1 phy rd1, wr1 (0x063f7431): 2 ranks, UDIMMs [ 580.588704] EDAC DEBUG: get_dimm_config: dimm 0 1024 Mb offset: 0, bank: 8, rank: 1, row: 0x4000, col: 0x400 (in this case, just one 1R memory is filled on channel 1) So, use a better way to represent the per-channel ranks information. After the patch, it will show: [ 2002.233978] EDAC DEBUG: get_dimm_config: Ch0 phy rd0, wr0 (0x063f7431): UDIMMs [ 2002.233982] EDAC DEBUG: get_dimm_config: dimm 0 1024 Mb offset: 0, bank: 8, rank: 1, row: 0x4000, col: 0x400 [ 2002.233988] EDAC DEBUG: get_dimm_config: dimm 1 1024 Mb offset: 4, bank: 8, rank: 1, row: 0x4000, col: 0x400 (in this case, there isn't any 4R memories) Reported-by: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i5000: Fix the fatal error handlingMauro Carvalho Chehab
The fatal error channel bits point to a single channel, and not to a range of channels. Fix the code to properly report it, instead of printing messages like: kernel: EDAC MC0: INTERNAL ERROR: channel-b out of range (4 >= 4) Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i5100_edac: Fix a warning when compiled with 32 bitsMauro Carvalho Chehab
drivers/edac/i5100_edac.c: In function ‘i5100_init_csrows’: drivers/edac/i5100_edac.c:862:3: warning: format ‘%zd’ expects argument of type ‘signed size_t’, but argument 5 has type ‘long unsigned int’ [-Wformat] Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i82975x_edac: Test nr_pages earlier to save a few CPU cyclesMauro Carvalho Chehab
Avoid test nr_pages twice, and initializing some data that won't be used. Cleanup patch only. Reported-by: Aristeu Rozanski Filho <arozansk@redhat.com> Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Ranganathan Desikan <ravi@jetztechnologies.com> Cc: "Arvind R." <arvino55@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28e752x_edac: provide more info about how DIMMS/ranks are mappedMauro Carvalho Chehab
No funtional changes here. Only the comments got updated. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Mark Gross <mark.gross@intel.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i5000_edac: Fix the logic that retrieves memory informationMauro Carvalho Chehab
The logic there is broken: it basically creates two csrows for each DIMM and assumes that all DIMM's are dual rank. Only one of the csrows will contain the entire DIMM size. If single rank memories are found, they'll be marked with 0 bytes. The check if the AMB is present were also wrong. Yet, as the error reports don't use the memory size in order to credit an error to the right DIMM, that part of the driver seems to work. That's why probably nobody detected the issue yet. After this patch, the memory layout is now properly reported, when debug mode is enabled, and the number of ranks per dimm is now shown: calculate_dimm_size: ---------------------------------------------------------- calculate_dimm_size: slot 3 0 MB | 0 MB | 0 MB | 0 MB | calculate_dimm_size: slot 2 0 MB | 0 MB | 0 MB | 0 MB | calculate_dimm_size: ---------------------------------------------------------- calculate_dimm_size: slot 1 0 MB | 0 MB | 0 MB | 0 MB | calculate_dimm_size: slot 0 512 MB 1R| 512 MB 1R| 512 MB 1R| 512 MB 1R| calculate_dimm_size: ---------------------------------------------------------- calculate_dimm_size: channel 0 | channel 1 | channel 2 | channel 3 | calculate_dimm_size: branch 0 | branch 1 | (1R above means that all memories on my test machine are single-ranked) Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i5400_edac: improve debug messages to better represent the filled memoryMauro Carvalho Chehab
Improves the debug output message, in order to better represent the memory controller hierarchy, when outputing the debug messages. No functional changes when debug is disabled. Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28edac: Cleanup the logs for i7core and sb edac driversMauro Carvalho Chehab
Remove some information that it is duplicated at the MCE log, and don't have much usage for the error. Those data will be added again, when creating a trace function that outputs both memory errors and MCE fields. Cc: Aristeu Rozanski <arozansk@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28edac: Initialize the dimm label with the known informationMauro Carvalho Chehab
While userspace doesn't fill the dimm labels, add there the dimm location, as described by the used memory model. This could eventually match what is described at the dmidecode, making easier for people to identify the memory. For example, on an Intel motherboard where the DMI table is reliable, the first memory stick is described as: Memory Device Array Handle: 0x0029 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 1 Locator: A1_DIMM0 Bank Locator: A1_Node0_Channel0_Dimm0 Type: <OUT OF SPEC> Type Detail: Synchronous Speed: 800 MHz Manufacturer: A1_Manufacturer0 Serial Number: A1_SerNum0 Asset Tag: A1_AssetTagNum0 Part Number: A1_PartNum0 The memory named as "A1_DIMM0" is physically located at the first memory controller (node 0), at channel 0, dimm slot 0. After this patch, the memory label will be filled with: /sys/devices/system/edac/mc/csrow0/ch0_dimm_label:mc#0channel#0slot#0 And (after the new EDAC API patches) as: /sys/devices/system/edac/mc/mc0/dimm0/dimm_label:mc#0channel#0slot#0 So, even if the memory label is not initialized on userspace, an useful information with the error location is filled there, expecially since several systems/motherboards are provided with enough info to map from channel/slot (or branch/channel/slot) into the DIMM label. So, letting the EDAC core fill it by default is a good thing. It should noticed that, as the label filling happens at the edac_mc_alloc(), drivers can override it to better describe the memories (and some actually do it). Cc: Aristeu Rozanski <arozansk@redhat.com> Cc: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28edac: Remove the legacy EDAC ABIMauro Carvalho Chehab
Now that all drivers got converted to use the new ABI, we can drop the old one. Acked-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28x38_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28tile_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Acked-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28sb_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28r82600_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Tim Small <tim@buttersideup.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28ppc4xx_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Josh Boyer <jwboyer@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28pasemi_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Olof Johansson <olof@lixom.net> Cc: Egor Martovetsky <egor@pasemi.com> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28mv64x60_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28mpc85xx_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Shaohui Xie <Shaohui.Xie@freescale.com> Cc: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i82975x_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Cc: Ranganathan Desikan <ravi@jetztechnologies.com> Cc: "Arvind R." <arvino55@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-28i82875p_edac: convert driver to use the new edac ABIMauro Carvalho Chehab
The legacy edac ABI is going to be removed. Port the driver to use and benefit from the new API functionality. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>