linux-toradex.git/drivers/nvdimm/core.c, branch v5.11

libnvdimm: Cleanup include of badblocks.h

2020-12-16T05:47:45+00:00

* drivers/nvdimm/core.c doesn't use anything from badblocks.h on its own,
  thus including it isn't needed. There's indeed indirect use, via funcs
  in nd.h, but this one already includes badblocks.h.

* drivers/nvdimm/claim.c calls stuff from badblocks.h and therefore should
  include it on its own (instead of relying any other header doing that)

* drivers/nvdimm/btt.h doesn't really need anything from badblocks.h and
  can easily live with a forward declaration of struct badblocks (just
  having pointers to it, but not dereferencing it anywhere)

Signed-off-by: Enrico Weigelt 
Link: https://lore.kernel.org/r/20201215163531.21446-1-info@metux.net
Signed-off-by: Dan Williams

PM, libnvdimm: Add runtime firmware activation support

2020-07-29T01:28:32+00:00

Abstract platform specific mechanics for nvdimm firmware activation
behind a handful of generic ops. At the bus level ->activate_state()
indicates the unified state (idle, busy, armed) of all DIMMs on the bus,
and ->capability() indicates the system state expectations for activate.
At the DIMM level ->activate_state() indicates the per-DIMM state,
->activate_result() indicates the outcome of the last activation
attempt, and ->arm() attempts to transition the DIMM from 'idle' to
'armed'.

A new hibernate_quiet_exec() facility is added to support firmware
activation in an OS defined system quiesce state. It leverages the fact
that the hibernate-freeze state wants to assert that a memory
hibernation snapshot can be taken. This is in contrast to a platform
firmware defined quiesce state that may forcefully quiet the memory
controller independent of whether an individual device-driver properly
supports hibernate-freeze.

The libnvdimm sysfs interface is extended to support detection of a
firmware activate capability. The mechanism supports enumeration and
triggering of firmware activate, optionally in the
hibernate_quiet_exec() context.

[rafael: hibernate_quiet_exec() proposal]
[vishal: fix up sparse warning, grammar in Documentation/]

Cc: Pavel Machek 
Cc: Ira Weiny 
Cc: Len Brown 
Cc: Jonathan Corbet 
Cc: Dave Jiang 
Cc: Vishal Verma 
Reported-by: kernel test robot 
Co-developed-by: "Rafael J. Wysocki" 
Signed-off-by: "Rafael J. Wysocki" 
Signed-off-by: Dan Williams 
Signed-off-by: Vishal Verma

Merge tag 'libnvdimm-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2019-12-02T02:43:25+00:00

Pull libnvdimm updates from Dan Williams:
 "The highlight this cycle is continuing integration fixes for PowerPC
  and some resulting optimizations.

  Summary:

   - Updates to better support vmalloc space restrictions on PowerPC
     platforms.

   - Cleanups to move common sysfs attributes to core 'struct
     device_type' objects.

   - Export the 'target_node' attribute (the effective numa node if pmem
     is marked online) for regions and namespaces.

   - Miscellaneous fixups and optimizations"

* tag 'libnvdimm-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (21 commits)
  MAINTAINERS: Remove Keith from NVDIMM maintainers
  libnvdimm: Export the target_node attribute for regions and namespaces
  dax: Add numa_node to the default device-dax attributes
  libnvdimm: Simplify root read-only definition for the 'resource' attribute
  dax: Simplify root read-only definition for the 'resource' attribute
  dax: Create a dax device_type
  libnvdimm: Move nvdimm_bus_attribute_group to device_type
  libnvdimm: Move nvdimm_attribute_group to device_type
  libnvdimm: Move nd_mapping_attribute_group to device_type
  libnvdimm: Move nd_region_attribute_group to device_type
  libnvdimm: Move nd_numa_attribute_group to device_type
  libnvdimm: Move nd_device_attribute_group to device_type
  libnvdimm: Move region attribute group definition
  libnvdimm: Move attribute groups to device type
  libnvdimm: Remove prototypes for nonexistent functions
  libnvdimm/btt: fix variable 'rc' set but not used
  libnvdimm/pmem: Delete include of nd-core.h
  libnvdimm/namespace: Differentiate between probe mapping and runtime mapping
  libnvdimm/pfn_dev: Don't clear device memmap area during generic namespace probe
  libnvdimm: Trivial comment fix
  ...

libnvdimm: Move nvdimm_bus_attribute_group to device_type

2019-11-19T17:52:12+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nvdimm_bus_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Signed-off-by: Dan Williams 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309903815.1582359.6418211876315050283.stgit@dwillia2-desk3.amr.corp.intel.com

lib: Uplevel the pmem "region" ida to a global allocator

2019-11-07T14:44:29+00:00

In preparation for handling platform differentiated memory types beyond
persistent memory, uplevel the "region" identifier to a global number
space. This enables a device-dax instance to be registered to any memory
type with guaranteed unique names.

Signed-off-by: Dan Williams 
Acked-by: Thomas Gleixner 
Signed-off-by: Rafael J. Wysocki

driver-core, libnvdimm: Let device subsystems add local lockdep coverage

2019-07-18T23:23:27+00:00

For good reason, the standard device_lock() is marked
lockdep_set_novalidate_class() because there is simply no sane way to
describe the myriad ways the device_lock() ordered with other locks.
However, that leaves subsystems that know their own local device_lock()
ordering rules to find lock ordering mistakes manually. Instead,
introduce an optional / additional lockdep-enabled lock that a subsystem
can acquire in all the same paths that the device_lock() is acquired.

A conversion of the NFIT driver and NVDIMM subsystem to a
lockdep-validate device_lock() scheme is included. The
debug_nvdimm_lock() implementation implements the correct lock-class and
stacking order for the libnvdimm device topology hierarchy.

Yes, this is a hack, but hopefully it is a useful hack for other
subsystems device_lock() debug sessions. Quoting Greg:

    "Yeah, it feels a bit hacky but it's really up to a subsystem to mess up
     using it as much as anything else, so user beware :)

     I don't object to it if it makes things easier for you to debug."

Cc: Ingo Molnar 
Cc: Ira Weiny 
Cc: Will Deacon 
Cc: Dave Jiang 
Cc: Keith Busch 
Cc: Peter Zijlstra 
Cc: Vishal Verma 
Cc: "Rafael J. Wysocki" 
Cc: Greg Kroah-Hartman 
Signed-off-by: Dan Williams 
Acked-by: Greg Kroah-Hartman 
Reviewed-by: Ira Weiny 
Link: https://lore.kernel.org/r/156341210661.292348.7014034644265455704.stgit@dwillia2-desk3.amr.corp.intel.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295

2019-06-05T15:36:38+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of version 2 of the gnu general public license as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 64 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.894819585@linutronix.de
Signed-off-by: Greg Kroah-Hartman

libnvdimm: remove redundant func in dev_dbg

2018-03-06T16:44:17+00:00

Dynamic debug can be instructed to add the function name to the debug
output using the +f switch, so there is no need for the libnvdimm
modules to do it again. If a user decides to add the +f switch for
libnvdimm's dynamic debug this results in double prints of the function
name.

Reported-by: Johannes Thumshirn 
Reported-by: Ross Zwisler 
Signed-off-by: Dan Williams

libnvdimm: move poison list functions to a new 'badrange' file

2017-11-02T17:42:30+00:00

nfit_test needs to use the poison list manipulation code as well. Make
it more generic and in the process rename poison to badrange, and move
all the related helpers to a new file.

Signed-off-by: Dave Jiang 
[vishal: Add badrange.o to nfit_test's Kbuild]
[vishal: add a missed include in bus.c for the new badrange functions]
[vishal: rename all instances of 'be' to 'bre']
Signed-off-by: Vishal Verma 
Signed-off-by: Dan Williams

libnvdimm: rename nd_sector_size_{show,store} to nd_size_select_{show,store}

2017-08-12T00:36:54+00:00

Prepare for other another consumer of this size selection scheme that is
not a 'sector size'.

Cc: Oliver O'Halloran 
Signed-off-by: Dan Williams