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driver core changes for 5.17-rc1

Browse Source 
Here is the set of changes for the driver core for 5.17-rc1.
 
 Lots of little things here, including:
 	- kobj_type cleanups
 	- auxiliary_bus documentation updates
 	- auxiliary_device conversions for some drivers (relevant
 	  subsystems all have provided acks for these)
 	- kernfs lock contention reduction for some workloads
 	- other tiny cleanups and changes.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the set of changes for the driver core for 5.17-rc1.

  Lots of little things here, including:

   - kobj_type cleanups

   - auxiliary_bus documentation updates

   - auxiliary_device conversions for some drivers (relevant subsystems
     all have provided acks for these)

   - kernfs lock contention reduction for some workloads

   - other tiny cleanups and changes.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'driver-core-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (43 commits)
  kobject documentation: remove default_attrs information
  drivers/firmware: Add missing platform_device_put() in sysfb_create_simplefb
  debugfs: lockdown: Allow reading debugfs files that are not world readable
  driver core: Make bus notifiers in right order in really_probe()
  driver core: Move driver_sysfs_remove() after driver_sysfs_add()
  firmware: edd: remove empty default_attrs array
  firmware: dmi-sysfs: use default_groups in kobj_type
  qemu_fw_cfg: use default_groups in kobj_type
  firmware: memmap: use default_groups in kobj_type
  sh: sq: use default_groups in kobj_type
  headers/uninline: Uninline single-use function: kobject_has_children()
  devtmpfs: mount with noexec and nosuid
  driver core: Simplify async probe test code by using ktime_ms_delta()
  nilfs2: use default_groups in kobj_type
  kobject: remove kset from struct kset_uevent_ops callbacks
  driver core: make kobj_type constant.
  driver core: platform: document registration-failure requirement
  vdpa/mlx5: Use auxiliary_device driver data helpers
  net/mlx5e: Use auxiliary_device driver data helpers
  soundwire: intel: Use auxiliary_device driver data helpers
  ...
This commit is contained in:
Linus Torvalds 2022-01-12 11:11:34 -08:00
commit 6dc69d3d0d
58 changed files with 1211 additions and 749 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
Documentation/ABI/testing/sysfs-devices-system-cpu
View File

@ -666,3 +666,18 @@ Description: Preferred MTE tag checking mode
================ ==============================================
See also: Documentation/arm64/memory-tagging-extension.rst
What: /sys/devices/system/cpu/nohz_full
Date: Apr 2015
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description:
(RO) the list of CPUs that are in nohz_full mode.
These CPUs are set by boot parameter "nohz_full=".
What: /sys/devices/system/cpu/isolated
Date: Apr 2015
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description:
(RO) the list of CPUs that are isolated and don't
participate in load balancing. These CPUs are set by
boot parameter "isolcpus=".

25
Documentation/admin-guide/cputopology.rst
View File

@ -8,11 +8,9 @@ to /proc/cpuinfo output of some architectures. They reside in
Documentation/ABI/stable/sysfs-devices-system-cpu.
Architecture-neutral, drivers/base/topology.c, exports these attributes.
However, the book and drawer related sysfs files will only be created if
CONFIG_SCHED_BOOK and CONFIG_SCHED_DRAWER are selected, respectively.
CONFIG_SCHED_BOOK and CONFIG_SCHED_DRAWER are currently only used on s390,
where they reflect the cpu and cache hierarchy.
However the die, cluster, book, and drawer hierarchy related sysfs files will
only be created if an architecture provides the related macros as described
below.
For an architecture to support this feature, it must define some of
these macros in include/asm-XXX/topology.h::
@ -43,15 +41,14 @@ not defined by include/asm-XXX/topology.h:
2) topology_die_id: -1
3) topology_cluster_id: -1
4) topology_core_id: 0
5) topology_sibling_cpumask: just the given CPU
6) topology_core_cpumask: just the given CPU
7) topology_cluster_cpumask: just the given CPU
8) topology_die_cpumask: just the given CPU
For architectures that don't support books (CONFIG_SCHED_BOOK) there are no
default definitions for topology_book_id() and topology_book_cpumask().
For architectures that don't support drawers (CONFIG_SCHED_DRAWER) there are
no default definitions for topology_drawer_id() and topology_drawer_cpumask().
5) topology_book_id: -1
6) topology_drawer_id: -1
7) topology_sibling_cpumask: just the given CPU
8) topology_core_cpumask: just the given CPU
9) topology_cluster_cpumask: just the given CPU
10) topology_die_cpumask: just the given CPU
11) topology_book_cpumask: just the given CPU
12) topology_drawer_cpumask: just the given CPU
Additionally, CPU topology information is provided under
/sys/devices/system/cpu and includes these files. The internal

16
Documentation/core-api/kobject.rst
View File

@ -118,7 +118,7 @@ Initialization of kobjects
Code which creates a kobject must, of course, initialize that object. Some
of the internal fields are setup with a (mandatory) call to kobject_init()::
void kobject_init(struct kobject *kobj, struct kobj_type *ktype);
void kobject_init(struct kobject *kobj, const struct kobj_type *ktype);
The ktype is required for a kobject to be created properly, as every kobject
must have an associated kobj_type. After calling kobject_init(), to
@ -156,7 +156,7 @@ kobject_name()::
There is a helper function to both initialize and add the kobject to the
kernel at the same time, called surprisingly enough kobject_init_and_add()::
int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype,
int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype,
struct kobject *parent, const char *fmt, ...);
The arguments are the same as the individual kobject_init() and
@ -299,7 +299,6 @@ kobj_type::
struct kobj_type {
void (*release)(struct kobject *kobj);
const struct sysfs_ops *sysfs_ops;
struct attribute **default_attrs;
const struct attribute_group **default_groups;
const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
const void *(*namespace)(struct kobject *kobj);
@ -313,10 +312,10 @@ call kobject_init() or kobject_init_and_add().
The release field in struct kobj_type is, of course, a pointer to the
release() method for this type of kobject. The other two fields (sysfs_ops
and default_attrs) control how objects of this type are represented in
and default_groups) control how objects of this type are represented in
sysfs; they are beyond the scope of this document.
The default_attrs pointer is a list of default attributes that will be
The default_groups pointer is a list of default attributes that will be
automatically created for any kobject that is registered with this ktype.
@ -373,10 +372,9 @@ If a kset wishes to control the uevent operations of the kobjects
associated with it, it can use the struct kset_uevent_ops to handle it::
struct kset_uevent_ops {
int (* const filter)(struct kset *kset, struct kobject *kobj);
const char *(* const name)(struct kset *kset, struct kobject *kobj);
int (* const uevent)(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env);
int (* const filter)(struct kobject *kobj);
const char *(* const name)(struct kobject *kobj);
int (* const uevent)(struct kobject *kobj, struct kobj_uevent_env *env);
};

224
Documentation/driver-api/auxiliary_bus.rst
View File

@ -6,231 +6,45 @@
Auxiliary Bus
=============
In some subsystems, the functionality of the core device (PCI/ACPI/other) is
too complex for a single device to be managed by a monolithic driver
(e.g. Sound Open Firmware), multiple devices might implement a common
intersection of functionality (e.g. NICs + RDMA), or a driver may want to
export an interface for another subsystem to drive (e.g. SIOV Physical Function
export Virtual Function management). A split of the functionality into child-
devices representing sub-domains of functionality makes it possible to
compartmentalize, layer, and distribute domain-specific concerns via a Linux
device-driver model.
An example for this kind of requirement is the audio subsystem where a single
IP is handling multiple entities such as HDMI, Soundwire, local devices such as
mics/speakers etc. The split for the core's functionality can be arbitrary or
be defined by the DSP firmware topology and include hooks for test/debug. This
allows for the audio core device to be minimal and focused on hardware-specific
control and communication.
Each auxiliary_device represents a part of its parent functionality. The
generic behavior can be extended and specialized as needed by encapsulating an
auxiliary_device within other domain-specific structures and the use of .ops
callbacks. Devices on the auxiliary bus do not share any structures and the use
of a communication channel with the parent is domain-specific.
Note that ops are intended as a way to augment instance behavior within a class
of auxiliary devices, it is not the mechanism for exporting common
infrastructure from the parent. Consider EXPORT_SYMBOL_NS() to convey
infrastructure from the parent module to the auxiliary module(s).
.. kernel-doc:: drivers/base/auxiliary.c
:doc: PURPOSE
When Should the Auxiliary Bus Be Used
=====================================
The auxiliary bus is to be used when a driver and one or more kernel modules,
who share a common header file with the driver, need a mechanism to connect and
provide access to a shared object allocated by the auxiliary_device's
registering driver. The registering driver for the auxiliary_device(s) and the
kernel module(s) registering auxiliary_drivers can be from the same subsystem,
or from multiple subsystems.
.. kernel-doc:: drivers/base/auxiliary.c
:doc: USAGE
The emphasis here is on a common generic interface that keeps subsystem
customization out of the bus infrastructure.
One example is a PCI network device that is RDMA-capable and exports a child
device to be driven by an auxiliary_driver in the RDMA subsystem. The PCI
driver allocates and registers an auxiliary_device for each physical
function on the NIC. The RDMA driver registers an auxiliary_driver that claims
each of these auxiliary_devices. This conveys data/ops published by the parent
PCI device/driver to the RDMA auxiliary_driver.
Auxiliary Device Creation
=========================
Another use case is for the PCI device to be split out into multiple sub
functions. For each sub function an auxiliary_device is created. A PCI sub
function driver binds to such devices that creates its own one or more class
devices. A PCI sub function auxiliary device is likely to be contained in a
struct with additional attributes such as user defined sub function number and
optional attributes such as resources and a link to the parent device. These
attributes could be used by systemd/udev; and hence should be initialized
before a driver binds to an auxiliary_device.
.. kernel-doc:: include/linux/auxiliary_bus.h
:identifiers: auxiliary_device
A key requirement for utilizing the auxiliary bus is that there is no
dependency on a physical bus, device, register accesses or regmap support.
These individual devices split from the core cannot live on the platform bus as
they are not physical devices that are controlled by DT/ACPI. The same
argument applies for not using MFD in this scenario as MFD relies on individual
function devices being physical devices.
Auxiliary Device
================
An auxiliary_device represents a part of its parent device's functionality. It
is given a name that, combined with the registering drivers KBUILD_MODNAME,
creates a match_name that is used for driver binding, and an id that combined
with the match_name provide a unique name to register with the bus subsystem.
Registering an auxiliary_device is a two-step process. First call
auxiliary_device_init(), which checks several aspects of the auxiliary_device
struct and performs a device_initialize(). After this step completes, any
error state must have a call to auxiliary_device_uninit() in its resolution path.
The second step in registering an auxiliary_device is to perform a call to
auxiliary_device_add(), which sets the name of the device and add the device to
the bus.
Unregistering an auxiliary_device is also a two-step process to mirror the
register process. First call auxiliary_device_delete(), then call
auxiliary_device_uninit().
.. code-block:: c
struct auxiliary_device {
struct device dev;
const char *name;
u32 id;
};
If two auxiliary_devices both with a match_name "mod.foo" are registered onto
the bus, they must have unique id values (e.g. "x" and "y") so that the
registered devices names are "mod.foo.x" and "mod.foo.y". If match_name + id
are not unique, then the device_add fails and generates an error message.
The auxiliary_device.dev.type.release or auxiliary_device.dev.release must be
populated with a non-NULL pointer to successfully register the auxiliary_device.
The auxiliary_device.dev.parent must also be populated.
.. kernel-doc:: drivers/base/auxiliary.c
:identifiers: auxiliary_device_init __auxiliary_device_add
auxiliary_find_device
Auxiliary Device Memory Model and Lifespan
------------------------------------------
The registering driver is the entity that allocates memory for the
auxiliary_device and register it on the auxiliary bus. It is important to note
that, as opposed to the platform bus, the registering driver is wholly
responsible for the management for the memory used for the driver object.
.. kernel-doc:: include/linux/auxiliary_bus.h
:doc: DEVICE_LIFESPAN
A parent object, defined in the shared header file, contains the
auxiliary_device. It also contains a pointer to the shared object(s), which
also is defined in the shared header. Both the parent object and the shared
object(s) are allocated by the registering driver. This layout allows the
auxiliary_driver's registering module to perform a container_of() call to go
from the pointer to the auxiliary_device, that is passed during the call to the
auxiliary_driver's probe function, up to the parent object, and then have
access to the shared object(s).
The memory for the auxiliary_device is freed only in its release() callback
flow as defined by its registering driver.
The memory for the shared object(s) must have a lifespan equal to, or greater
than, the lifespan of the memory for the auxiliary_device. The auxiliary_driver
should only consider that this shared object is valid as long as the
auxiliary_device is still registered on the auxiliary bus. It is up to the
registering driver to manage (e.g. free or keep available) the memory for the
shared object beyond the life of the auxiliary_device.
The registering driver must unregister all auxiliary devices before its own
driver.remove() is completed.
Auxiliary Drivers
=================
Auxiliary drivers follow the standard driver model convention, where
discovery/enumeration is handled by the core, and drivers
provide probe() and remove() methods. They support power management
and shutdown notifications using the standard conventions.
.. kernel-doc:: include/linux/auxiliary_bus.h
:identifiers: auxiliary_driver module_auxiliary_driver
.. code-block:: c
struct auxiliary_driver {
int (*probe)(struct auxiliary_device *,
const struct auxiliary_device_id *id);
void (*remove)(struct auxiliary_device *);
void (*shutdown)(struct auxiliary_device *);
int (*suspend)(struct auxiliary_device *, pm_message_t);
int (*resume)(struct auxiliary_device *);
struct device_driver driver;
const struct auxiliary_device_id *id_table;
};
Auxiliary drivers register themselves with the bus by calling
auxiliary_driver_register(). The id_table contains the match_names of auxiliary
devices that a driver can bind with.
.. kernel-doc:: drivers/base/auxiliary.c
:identifiers: __auxiliary_driver_register auxiliary_driver_unregister
Example Usage
=============
Auxiliary devices are created and registered by a subsystem-level core device
that needs to break up its functionality into smaller fragments. One way to
extend the scope of an auxiliary_device is to encapsulate it within a domain-
pecific structure defined by the parent device. This structure contains the
auxiliary_device and any associated shared data/callbacks needed to establish
the connection with the parent.
.. kernel-doc:: drivers/base/auxiliary.c
:doc: EXAMPLE
An example is:
.. code-block:: c
struct foo {
struct auxiliary_device auxdev;
void (*connect)(struct auxiliary_device *auxdev);
void (*disconnect)(struct auxiliary_device *auxdev);
void *data;
};
The parent device then registers the auxiliary_device by calling
auxiliary_device_init(), and then auxiliary_device_add(), with the pointer to
the auxdev member of the above structure. The parent provides a name for the
auxiliary_device that, combined with the parent's KBUILD_MODNAME, creates a
match_name that is be used for matching and binding with a driver.
Whenever an auxiliary_driver is registered, based on the match_name, the
auxiliary_driver's probe() is invoked for the matching devices. The
auxiliary_driver can also be encapsulated inside custom drivers that make the
core device's functionality extensible by adding additional domain-specific ops
as follows:
.. code-block:: c
struct my_ops {
void (*send)(struct auxiliary_device *auxdev);
void (*receive)(struct auxiliary_device *auxdev);
};
struct my_driver {
struct auxiliary_driver auxiliary_drv;
const struct my_ops ops;
};
An example of this type of usage is:
.. code-block:: c
const struct auxiliary_device_id my_auxiliary_id_table[] = {
{ .name = "foo_mod.foo_dev" },
{ },
};
const struct my_ops my_custom_ops = {
.send = my_tx,
.receive = my_rx,
};
const struct my_driver my_drv = {
.auxiliary_drv = {
.name = "myauxiliarydrv",
.id_table = my_auxiliary_id_table,
.probe = my_probe,
.remove = my_remove,
.shutdown = my_shutdown,
},
.ops = my_custom_ops,
};

12
Documentation/translations/zh_CN/core-api/kobject.rst
View File

@ -258,7 +258,6 @@ kobject_put()以避免错误的发生是一个很好的做法。
struct kobj_type {
void (*release)(struct kobject *kobj);
const struct sysfs_ops *sysfs_ops;
struct attribute **default_attrs;
const struct attribute_group **default_groups;
const struct kobj_ns_type_operations *(*child_ns_type)(struct kobject *kobj);
const void *(*namespace)(struct kobject *kobj);
@ -271,10 +270,10 @@ kobject_init()或kobject_init_and_add()时必须指定一个指向该结构的
指针。
当然，kobj_type结构中的release字段是指向这种类型的kobject的release()
方法的一个指针。另外两个字段（sysfs_ops 和 default_attrs）控制这种
方法的一个指针。另外两个字段（sysfs_ops 和 default_groups）控制这种
类型的对象如何在 sysfs 中被表示；它们超出了本文的范围。
default_attrs 指针是一个默认属性的列表，它将为任何用这个 ktype 注册
default_groups 指针是一个默认属性的列表，它将为任何用这个 ktype 注册
的 kobject 自动创建。
@ -325,10 +324,9 @@ ksets
结构体kset_uevent_ops来处理它::
struct kset_uevent_ops {
int (* const filter)(struct kset *kset, struct kobject *kobj);
const char *(* const name)(struct kset *kset, struct kobject *kobj);
int (* const uevent)(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env);
int (* const filter)(struct kobject *kobj);
const char *(* const name)(struct kobject *kobj);
int (* const uevent)(struct kobject *kobj, struct kobj_uevent_env *env);
};

12
MAINTAINERS
View File

@ -9819,10 +9819,9 @@ S: Maintained
F: drivers/mfd/intel_soc_pmic*
F: include/linux/mfd/intel_soc_pmic*
INTEL PMT DRIVER
M: "David E. Box" <david.e.box@linux.intel.com>
S: Maintained
F: drivers/mfd/intel_pmt.c
INTEL PMT DRIVERS
M: David E. Box <david.e.box@linux.intel.com>
S: Supported
F: drivers/platform/x86/intel/pmt/
INTEL PRO/WIRELESS 2100, 2200BG, 2915ABG NETWORK CONNECTION SUPPORT
@ -9889,6 +9888,11 @@ L: platform-driver-x86@vger.kernel.org
S: Maintained
F: drivers/platform/x86/intel/uncore-frequency.c
INTEL VENDOR SPECIFIC EXTENDED CAPABILITIES DRIVER
M: David E. Box <david.e.box@linux.intel.com>
S: Supported
F: drivers/platform/x86/intel/vsec.*
INTEL VIRTUAL BUTTON DRIVER
M: AceLan Kao <acelan.kao@canonical.com>
L: platform-driver-x86@vger.kernel.org

3
arch/sh/kernel/cpu/sh4/sq.c
View File

@ -324,6 +324,7 @@ static struct attribute *sq_sysfs_attrs[] = {
&mapping_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(sq_sysfs);
static const struct sysfs_ops sq_sysfs_ops = {
.show = sq_sysfs_show,
@ -332,7 +333,7 @@ static const struct sysfs_ops sq_sysfs_ops = {
static struct kobj_type ktype_percpu_entry = {
.sysfs_ops = &sq_sysfs_ops,
.default_attrs = sq_sysfs_attrs,
.default_groups = sq_sysfs_groups,
};
static int sq_dev_add(struct device *dev, struct subsys_interface *sif)

11
drivers/base/Kconfig
View File

@ -62,6 +62,17 @@ config DEVTMPFS_MOUNT
rescue mode with init=/bin/sh, even when the /dev directory
on the rootfs is completely empty.
config DEVTMPFS_SAFE
bool "Use nosuid,noexec mount options on devtmpfs"
depends on DEVTMPFS
help
This instructs the kernel to include the MS_NOEXEC and MS_NOSUID mount
flags when mounting devtmpfs.
Notice: If enabled, things like /dev/mem cannot be mmapped
with the PROT_EXEC flag. This can break, for example, non-KMS
video drivers.
config STANDALONE
bool "Select only drivers that don't need compile-time external firmware"
default y

152
drivers/base/auxiliary.c
View File

@ -17,6 +17,147 @@
#include <linux/auxiliary_bus.h>
#include "base.h"
/**
* DOC: PURPOSE
*
* In some subsystems, the functionality of the core device (PCI/ACPI/other) is
* too complex for a single device to be managed by a monolithic driver (e.g.
* Sound Open Firmware), multiple devices might implement a common intersection
* of functionality (e.g. NICs + RDMA), or a driver may want to export an
* interface for another subsystem to drive (e.g. SIOV Physical Function export
* Virtual Function management). A split of the functionality into child-
* devices representing sub-domains of functionality makes it possible to
* compartmentalize, layer, and distribute domain-specific concerns via a Linux
* device-driver model.
*
* An example for this kind of requirement is the audio subsystem where a
* single IP is handling multiple entities such as HDMI, Soundwire, local
* devices such as mics/speakers etc. The split for the core's functionality
* can be arbitrary or be defined by the DSP firmware topology and include
* hooks for test/debug. This allows for the audio core device to be minimal
* and focused on hardware-specific control and communication.
*
* Each auxiliary_device represents a part of its parent functionality. The
* generic behavior can be extended and specialized as needed by encapsulating
* an auxiliary_device within other domain-specific structures and the use of
* .ops callbacks. Devices on the auxiliary bus do not share any structures and
* the use of a communication channel with the parent is domain-specific.
*
* Note that ops are intended as a way to augment instance behavior within a
* class of auxiliary devices, it is not the mechanism for exporting common
* infrastructure from the parent. Consider EXPORT_SYMBOL_NS() to convey
* infrastructure from the parent module to the auxiliary module(s).
*/
/**
* DOC: USAGE
*
* The auxiliary bus is to be used when a driver and one or more kernel
* modules, who share a common header file with the driver, need a mechanism to
* connect and provide access to a shared object allocated by the
* auxiliary_device's registering driver. The registering driver for the
* auxiliary_device(s) and the kernel module(s) registering auxiliary_drivers
* can be from the same subsystem, or from multiple subsystems.
*
* The emphasis here is on a common generic interface that keeps subsystem
* customization out of the bus infrastructure.
*
* One example is a PCI network device that is RDMA-capable and exports a child
* device to be driven by an auxiliary_driver in the RDMA subsystem. The PCI
* driver allocates and registers an auxiliary_device for each physical
* function on the NIC. The RDMA driver registers an auxiliary_driver that
* claims each of these auxiliary_devices. This conveys data/ops published by
* the parent PCI device/driver to the RDMA auxiliary_driver.
*
* Another use case is for the PCI device to be split out into multiple sub
* functions. For each sub function an auxiliary_device is created. A PCI sub
* function driver binds to such devices that creates its own one or more class
* devices. A PCI sub function auxiliary device is likely to be contained in a
* struct with additional attributes such as user defined sub function number
* and optional attributes such as resources and a link to the parent device.
* These attributes could be used by systemd/udev; and hence should be
* initialized before a driver binds to an auxiliary_device.
*
* A key requirement for utilizing the auxiliary bus is that there is no
* dependency on a physical bus, device, register accesses or regmap support.
* These individual devices split from the core cannot live on the platform bus
* as they are not physical devices that are controlled by DT/ACPI. The same
* argument applies for not using MFD in this scenario as MFD relies on
* individual function devices being physical devices.
*/
/**
* DOC: EXAMPLE
*
* Auxiliary devices are created and registered by a subsystem-level core
* device that needs to break up its functionality into smaller fragments. One
* way to extend the scope of an auxiliary_device is to encapsulate it within a
* domain- pecific structure defined by the parent device. This structure
* contains the auxiliary_device and any associated shared data/callbacks
* needed to establish the connection with the parent.
*
* An example is:
*
* .. code-block:: c
*
* struct foo {
* struct auxiliary_device auxdev;
* void (*connect)(struct auxiliary_device *auxdev);
* void (*disconnect)(struct auxiliary_device *auxdev);
* void *data;
* };
*
* The parent device then registers the auxiliary_device by calling
* auxiliary_device_init(), and then auxiliary_device_add(), with the pointer
* to the auxdev member of the above structure. The parent provides a name for
* the auxiliary_device that, combined with the parent's KBUILD_MODNAME,
* creates a match_name that is be used for matching and binding with a driver.
*
* Whenever an auxiliary_driver is registered, based on the match_name, the
* auxiliary_driver's probe() is invoked for the matching devices. The
* auxiliary_driver can also be encapsulated inside custom drivers that make
* the core device's functionality extensible by adding additional
* domain-specific ops as follows:
*
* .. code-block:: c
*
* struct my_ops {
* void (*send)(struct auxiliary_device *auxdev);
* void (*receive)(struct auxiliary_device *auxdev);
* };
*
*
* struct my_driver {
* struct auxiliary_driver auxiliary_drv;
* const struct my_ops ops;
* };
*
* An example of this type of usage is:
*
* .. code-block:: c
*
* const struct auxiliary_device_id my_auxiliary_id_table[] = {
* { .name = "foo_mod.foo_dev" },
* { },
* };
*
* const struct my_ops my_custom_ops = {
* .send = my_tx,
* .receive = my_rx,
* };
*
* const struct my_driver my_drv = {
* .auxiliary_drv = {
* .name = "myauxiliarydrv",
* .id_table = my_auxiliary_id_table,
* .probe = my_probe,
* .remove = my_remove,
* .shutdown = my_shutdown,
* },
* .ops = my_custom_ops,
* };
*/
static const struct auxiliary_device_id *auxiliary_match_id(const struct auxiliary_device_id *id,
const struct auxiliary_device *auxdev)
{
@ -117,7 +258,7 @@ static struct bus_type auxiliary_bus_type = {
* auxiliary_device_init - check auxiliary_device and initialize
* @auxdev: auxiliary device struct
*
* This is the first step in the two-step process to register an
* This is the second step in the three-step process to register an
* auxiliary_device.
*
* When this function returns an error code, then the device_initialize will
@ -155,7 +296,7 @@ EXPORT_SYMBOL_GPL(auxiliary_device_init);
* @auxdev: auxiliary bus device to add to the bus
* @modname: name of the parent device's driver module
*
* This is the second step in the two-step process to register an
* This is the third step in the three-step process to register an
* auxiliary_device.
*
* This function must be called after a successful call to
@ -202,6 +343,8 @@ EXPORT_SYMBOL_GPL(__auxiliary_device_add);
* This function returns a reference to a device that is 'found'
* for later use, as determined by the @match callback.
*
* The reference returned should be released with put_device().
*
* The callback should return 0 if the device doesn't match and non-zero
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
@ -225,6 +368,11 @@ EXPORT_SYMBOL_GPL(auxiliary_find_device);
* @auxdrv: auxiliary_driver structure
* @owner: owning module/driver
* @modname: KBUILD_MODNAME for parent driver
*
* The expectation is that users will call the "auxiliary_driver_register"
* macro so that the caller's KBUILD_MODNAME is automatically inserted for the
* modname parameter. Only if a user requires a custom name would this version
* be called directly.
*/
int __auxiliary_driver_register(struct auxiliary_driver *auxdrv,
struct module *owner, const char *modname)

4
drivers/base/bus.c
View File

@ -163,9 +163,9 @@ static struct kobj_type bus_ktype = {
.release = bus_release,
};
static int bus_uevent_filter(struct kset *kset, struct kobject *kobj)
static int bus_uevent_filter(struct kobject *kobj)
{
struct kobj_type *ktype = get_ktype(kobj);
const struct kobj_type *ktype = get_ktype(kobj);
if (ktype == &bus_ktype)
return 1;

30
drivers/base/core.c
View File

@ -2260,9 +2260,9 @@ static struct kobj_type device_ktype = {
};
static int dev_uevent_filter(struct kset *kset, struct kobject *kobj)
static int dev_uevent_filter(struct kobject *kobj)
{
struct kobj_type *ktype = get_ktype(kobj);
const struct kobj_type *ktype = get_ktype(kobj);
if (ktype == &device_ktype) {
struct device *dev = kobj_to_dev(kobj);
@ -2274,7 +2274,7 @@ static int dev_uevent_filter(struct kset *kset, struct kobject *kobj)
return 0;
}
static const char *dev_uevent_name(struct kset *kset, struct kobject *kobj)
static const char *dev_uevent_name(struct kobject *kobj)
{
struct device *dev = kobj_to_dev(kobj);
@ -2285,8 +2285,7 @@ static const char *dev_uevent_name(struct kset *kset, struct kobject *kobj)
return NULL;
}
static int dev_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
static int dev_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
{
struct device *dev = kobj_to_dev(kobj);
int retval = 0;
@ -2381,7 +2380,7 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
/* respect filter */
if (kset->uevent_ops && kset->uevent_ops->filter)
if (!kset->uevent_ops->filter(kset, &dev->kobj))
if (!kset->uevent_ops->filter(&dev->kobj))
goto out;
env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
@ -2389,7 +2388,7 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
return -ENOMEM;
/* let the kset specific function add its keys */
retval = kset->uevent_ops->uevent(kset, &dev->kobj, env);
retval = kset->uevent_ops->uevent(&dev->kobj, env);
if (retval)
goto out;
@ -3028,6 +3027,23 @@ static inline struct kobject *get_glue_dir(struct device *dev)
return dev->kobj.parent;
}
/**
* kobject_has_children - Returns whether a kobject has children.
* @kobj: the object to test
*
* This will return whether a kobject has other kobjects as children.
*
* It does NOT account for the presence of attribute files, only sub
* directories. It also assumes there is no concurrent addition or
* removal of such children, and thus relies on external locking.
*/
static inline bool kobject_has_children(struct kobject *kobj)
{
WARN_ON_ONCE(kref_read(&kobj->kref) == 0);
return kobj->sd && kobj->sd->dir.subdirs;
}
/*
* make sure cleaning up dir as the last step, we need to make
* sure .release handler of kobject is run with holding the

7
drivers/base/dd.c
View File

@ -577,14 +577,14 @@ re_probe:
if (dev->bus->dma_configure) {
ret = dev->bus->dma_configure(dev);
if (ret)
goto probe_failed;
goto pinctrl_bind_failed;
}
ret = driver_sysfs_add(dev);
if (ret) {
pr_err("%s: driver_sysfs_add(%s) failed\n",
__func__, dev_name(dev));
goto probe_failed;
goto sysfs_failed;
}
if (dev->pm_domain && dev->pm_domain->activate) {
@ -657,6 +657,8 @@ dev_groups_failed:
else if (drv->remove)
drv->remove(dev);
probe_failed:
driver_sysfs_remove(dev);
sysfs_failed:
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DRIVER_NOT_BOUND, dev);
@ -666,7 +668,6 @@ pinctrl_bind_failed:
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
driver_sysfs_remove(dev);
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
if (dev->pm_domain && dev->pm_domain->dismiss)

10
drivers/base/devtmpfs.c
View File

@ -29,6 +29,12 @@
#include <uapi/linux/mount.h>
#include "base.h"
#ifdef CONFIG_DEVTMPFS_SAFE
#define DEVTMPFS_MFLAGS (MS_SILENT | MS_NOEXEC | MS_NOSUID)
#else
#define DEVTMPFS_MFLAGS (MS_SILENT)
#endif
static struct task_struct *thread;
static int __initdata mount_dev = IS_ENABLED(CONFIG_DEVTMPFS_MOUNT);
@ -363,7 +369,7 @@ int __init devtmpfs_mount(void)
if (!thread)
return 0;
err = init_mount("devtmpfs", "dev", "devtmpfs", MS_SILENT, NULL);
err = init_mount("devtmpfs", "dev", "devtmpfs", DEVTMPFS_MFLAGS, NULL);
if (err)
printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
else
@ -412,7 +418,7 @@ static noinline int __init devtmpfs_setup(void *p)
err = ksys_unshare(CLONE_NEWNS);
if (err)
goto out;
err = init_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
err = init_mount("devtmpfs", "/", "devtmpfs", DEVTMPFS_MFLAGS, NULL);
if (err)
goto out;
init_chdir("/.."); /* will traverse into overmounted root */

9
drivers/base/platform.c
View File

@ -258,8 +258,9 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
int ret;
ret = platform_get_irq_optional(dev, num);
if (ret < 0 && ret != -EPROBE_DEFER)
dev_err(&dev->dev, "IRQ index %u not found\n", num);
if (ret < 0)
return dev_err_probe(&dev->dev, ret,
"IRQ index %u not found\n", num);
return ret;
}
@ -762,6 +763,10 @@ EXPORT_SYMBOL_GPL(platform_device_del);
/**
* platform_device_register - add a platform-level device
* @pdev: platform device we're adding
*
* NOTE: _Never_ directly free @pdev after calling this function, even if it
* returned an error! Always use platform_device_put() to give up the
* reference initialised in this function instead.
*/
int platform_device_register(struct platform_device *pdev)
{

13
drivers/base/property.c
View File

@ -478,8 +478,17 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
unsigned int nargs, unsigned int index,
struct fwnode_reference_args *args)
{
return fwnode_call_int_op(fwnode, get_reference_args, prop, nargs_prop,
nargs, index, args);
int ret;
ret = fwnode_call_int_op(fwnode, get_reference_args, prop, nargs_prop,
nargs, index, args);
if (ret < 0 && !IS_ERR_OR_NULL(fwnode) &&
!IS_ERR_OR_NULL(fwnode->secondary))
ret = fwnode_call_int_op(fwnode->secondary, get_reference_args,
prop, nargs_prop, nargs, index, args);
return ret;
}
EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args);

14
drivers/base/test/test_async_driver_probe.c
View File

@ -104,7 +104,7 @@ static int __init test_async_probe_init(void)
struct platform_device **pdev = NULL;
int async_id = 0, sync_id = 0;
unsigned long long duration;
ktime_t calltime, delta;
ktime_t calltime;
int err, nid, cpu;
pr_info("registering first set of asynchronous devices...\n");
@ -133,8 +133,7 @@ static int __init test_async_probe_init(void)
goto err_unregister_async_devs;
}
delta = ktime_sub(ktime_get(), calltime);
duration = (unsigned long long) ktime_to_ms(delta);
duration = (unsigned long long)ktime_ms_delta(ktime_get(), calltime);
pr_info("registration took %lld msecs\n", duration);
if (duration > TEST_PROBE_THRESHOLD) {
pr_err("test failed: probe took too long\n");
@ -161,8 +160,7 @@ static int __init test_async_probe_init(void)
async_id++;
}
delta = ktime_sub(ktime_get(), calltime);
duration = (unsigned long long) ktime_to_ms(delta);
duration = (unsigned long long)ktime_ms_delta(ktime_get(), calltime);
dev_info(&(*pdev)->dev,
"registration took %lld msecs\n", duration);
if (duration > TEST_PROBE_THRESHOLD) {
@ -197,8 +195,7 @@ static int __init test_async_probe_init(void)
goto err_unregister_sync_devs;
}
delta = ktime_sub(ktime_get(), calltime);
duration = (unsigned long long) ktime_to_ms(delta);
duration = (unsigned long long)ktime_ms_delta(ktime_get(), calltime);
pr_info("registration took %lld msecs\n", duration);
if (duration < TEST_PROBE_THRESHOLD) {
dev_err(&(*pdev)->dev,
@ -223,8 +220,7 @@ static int __init test_async_probe_init(void)
sync_id++;
delta = ktime_sub(ktime_get(), calltime);
duration = (unsigned long long) ktime_to_ms(delta);
duration = (unsigned long long)ktime_ms_delta(ktime_get(), calltime);
dev_info(&(*pdev)->dev,
"registration took %lld msecs\n", duration);
if (duration < TEST_PROBE_THRESHOLD) {

28
drivers/base/topology.c
View File

@ -45,11 +45,15 @@ static ssize_t name##_list_read(struct file *file, struct kobject *kobj, \
define_id_show_func(physical_package_id);
static DEVICE_ATTR_RO(physical_package_id);
#ifdef TOPOLOGY_DIE_SYSFS
define_id_show_func(die_id);
static DEVICE_ATTR_RO(die_id);
#endif
#ifdef TOPOLOGY_CLUSTER_SYSFS
define_id_show_func(cluster_id);
static DEVICE_ATTR_RO(cluster_id);
#endif
define_id_show_func(core_id);
static DEVICE_ATTR_RO(core_id);
@ -66,19 +70,23 @@ define_siblings_read_func(core_siblings, core_cpumask);
static BIN_ATTR_RO(core_siblings, 0);
static BIN_ATTR_RO(core_siblings_list, 0);
#ifdef TOPOLOGY_CLUSTER_SYSFS
define_siblings_read_func(cluster_cpus, cluster_cpumask);
static BIN_ATTR_RO(cluster_cpus, 0);
static BIN_ATTR_RO(cluster_cpus_list, 0);
#endif
#ifdef TOPOLOGY_DIE_SYSFS
define_siblings_read_func(die_cpus, die_cpumask);
static BIN_ATTR_RO(die_cpus, 0);
static BIN_ATTR_RO(die_cpus_list, 0);
#endif
define_siblings_read_func(package_cpus, core_cpumask);
static BIN_ATTR_RO(package_cpus, 0);
static BIN_ATTR_RO(package_cpus_list, 0);
#ifdef CONFIG_SCHED_BOOK
#ifdef TOPOLOGY_BOOK_SYSFS
define_id_show_func(book_id);
static DEVICE_ATTR_RO(book_id);
define_siblings_read_func(book_siblings, book_cpumask);
@ -86,7 +94,7 @@ static BIN_ATTR_RO(book_siblings, 0);
static BIN_ATTR_RO(book_siblings_list, 0);
#endif
#ifdef CONFIG_SCHED_DRAWER
#ifdef TOPOLOGY_DRAWER_SYSFS
define_id_show_func(drawer_id);
static DEVICE_ATTR_RO(drawer_id);
define_siblings_read_func(drawer_siblings, drawer_cpumask);
@ -101,17 +109,21 @@ static struct bin_attribute *bin_attrs[] = {
&bin_attr_thread_siblings_list,
&bin_attr_core_siblings,
&bin_attr_core_siblings_list,
#ifdef TOPOLOGY_CLUSTER_SYSFS
&bin_attr_cluster_cpus,
&bin_attr_cluster_cpus_list,
#endif
#ifdef TOPOLOGY_DIE_SYSFS
&bin_attr_die_cpus,
&bin_attr_die_cpus_list,
#endif
&bin_attr_package_cpus,
&bin_attr_package_cpus_list,
#ifdef CONFIG_SCHED_BOOK
#ifdef TOPOLOGY_BOOK_SYSFS
&bin_attr_book_siblings,
&bin_attr_book_siblings_list,
#endif
#ifdef CONFIG_SCHED_DRAWER
#ifdef TOPOLOGY_DRAWER_SYSFS
&bin_attr_drawer_siblings,
&bin_attr_drawer_siblings_list,
#endif
@ -120,13 +132,17 @@ static struct bin_attribute *bin_attrs[] = {
static struct attribute *default_attrs[] = {
&dev_attr_physical_package_id.attr,
#ifdef TOPOLOGY_DIE_SYSFS
&dev_attr_die_id.attr,
#endif
#ifdef TOPOLOGY_CLUSTER_SYSFS
&dev_attr_cluster_id.attr,
#endif
&dev_attr_core_id.attr,
#ifdef CONFIG_SCHED_BOOK
#ifdef TOPOLOGY_BOOK_SYSFS
&dev_attr_book_id.attr,
#endif
#ifdef CONFIG_SCHED_DRAWER
#ifdef TOPOLOGY_DRAWER_SYSFS
&dev_attr_drawer_id.attr,
#endif
NULL

2
drivers/dma-buf/dma-buf-sysfs-stats.c
View File

@ -132,7 +132,7 @@ void dma_buf_stats_teardown(struct dma_buf *dmabuf)
/* Statistics files do not need to send uevents. */
static int dmabuf_sysfs_uevent_filter(struct kset *kset, struct kobject *kobj)
static int dmabuf_sysfs_uevent_filter(struct kobject *kobj)
{
return 0;
}

7
drivers/firmware/dmi-sysfs.c
View File

@ -302,12 +302,12 @@ static struct attribute *dmi_sysfs_sel_attrs[] = {
&dmi_sysfs_attr_sel_per_log_type_descriptor_length.attr,
NULL,
};
ATTRIBUTE_GROUPS(dmi_sysfs_sel);
static struct kobj_type dmi_system_event_log_ktype = {
.release = dmi_entry_free,
.sysfs_ops = &dmi_sysfs_specialize_attr_ops,
.default_attrs = dmi_sysfs_sel_attrs,
.default_groups = dmi_sysfs_sel_groups,
};
typedef u8 (*sel_io_reader)(const struct dmi_system_event_log *sel,
@ -518,6 +518,7 @@ static struct attribute *dmi_sysfs_entry_attrs[] = {
&dmi_sysfs_attr_entry_position.attr,
NULL,
};
ATTRIBUTE_GROUPS(dmi_sysfs_entry);
static ssize_t dmi_entry_raw_read_helper(struct dmi_sysfs_entry *entry,
const struct dmi_header *dh,
@ -565,7 +566,7 @@ static void dmi_sysfs_entry_release(struct kobject *kobj)
static struct kobj_type dmi_sysfs_entry_ktype = {
.release = dmi_sysfs_entry_release,
.sysfs_ops = &dmi_sysfs_attr_ops,
.default_attrs = dmi_sysfs_entry_attrs,
.default_groups = dmi_sysfs_entry_groups,
};
static struct kset *dmi_kset;

9
drivers/firmware/edd.c
View File

@ -574,14 +574,6 @@ static EDD_DEVICE_ATTR(interface, 0444, edd_show_interface, edd_has_edd30);
static EDD_DEVICE_ATTR(host_bus, 0444, edd_show_host_bus, edd_has_edd30);
static EDD_DEVICE_ATTR(mbr_signature, 0444, edd_show_mbr_signature, edd_has_mbr_signature);
/* These are default attributes that are added for every edd
* device discovered. There are none.
*/
static struct attribute * def_attrs[] = {
NULL,
};
/* These attributes are conditional and only added for some devices. */
static struct edd_attribute * edd_attrs[] = {
&edd_attr_raw_data,
@ -619,7 +611,6 @@ static void edd_release(struct kobject * kobj)
static struct kobj_type edd_ktype = {
.release = edd_release,
.sysfs_ops = &edd_attr_ops,
.default_attrs = def_attrs,
};
static struct kset *edd_kset;

3
drivers/firmware/memmap.c
View File

@ -69,6 +69,7 @@ static struct attribute *def_attrs[] = {
&memmap_type_attr.attr,
NULL
};
ATTRIBUTE_GROUPS(def);
static const struct sysfs_ops memmap_attr_ops = {
.show = memmap_attr_show,
@ -118,7 +119,7 @@ static void __meminit release_firmware_map_entry(struct kobject *kobj)
static struct kobj_type __refdata memmap_ktype = {
.release = release_firmware_map_entry,
.sysfs_ops = &memmap_attr_ops,
.default_attrs = def_attrs,
.default_groups = def_groups,
};
/*

5
drivers/firmware/qemu_fw_cfg.c
View File

@ -395,7 +395,7 @@ static void fw_cfg_sysfs_cache_cleanup(void)
}
}
/* default_attrs: per-entry attributes and show methods */
/* per-entry attributes and show methods */
#define FW_CFG_SYSFS_ATTR(_attr) \
struct fw_cfg_sysfs_attribute fw_cfg_sysfs_attr_##_attr = { \
@ -428,6 +428,7 @@ static struct attribute *fw_cfg_sysfs_entry_attrs[] = {
&fw_cfg_sysfs_attr_name.attr,
NULL,
};
ATTRIBUTE_GROUPS(fw_cfg_sysfs_entry);
/* sysfs_ops: find fw_cfg_[entry, attribute] and call appropriate show method */
static ssize_t fw_cfg_sysfs_attr_show(struct kobject *kobj, struct attribute *a,
@ -454,7 +455,7 @@ static void fw_cfg_sysfs_release_entry(struct kobject *kobj)
/* kobj_type: ties together all properties required to register an entry */
static struct kobj_type fw_cfg_sysfs_entry_ktype = {
.default_attrs = fw_cfg_sysfs_entry_attrs,
.default_groups = fw_cfg_sysfs_entry_groups,
.sysfs_ops = &fw_cfg_sysfs_attr_ops,
.release = fw_cfg_sysfs_release_entry,
};

8
drivers/firmware/sysfb_simplefb.c
View File

@ -113,12 +113,16 @@ __init int sysfb_create_simplefb(const struct screen_info *si,
sysfb_apply_efi_quirks(pd);
ret = platform_device_add_resources(pd, &res, 1);
if (ret)
if (ret) {
platform_device_put(pd);
return ret;
}
ret = platform_device_add_data(pd, mode, sizeof(*mode));
if (ret)
if (ret) {
platform_device_put(pd);
return ret;
}
return platform_device_add(pd);
}

4
drivers/infiniband/hw/irdma/main.c
View File

@ -207,7 +207,7 @@ static void irdma_remove(struct auxiliary_device *aux_dev)
struct iidc_auxiliary_dev,
adev);
struct ice_pf *pf = iidc_adev->pf;
struct irdma_device *iwdev = dev_get_drvdata(&aux_dev->dev);
struct irdma_device *iwdev = auxiliary_get_drvdata(aux_dev);
irdma_ib_unregister_device(iwdev);
ice_rdma_update_vsi_filter(pf, iwdev->vsi_num, false);
@ -295,7 +295,7 @@ static int irdma_probe(struct auxiliary_device *aux_dev, const struct auxiliary_
ice_rdma_update_vsi_filter(pf, iwdev->vsi_num, true);
ibdev_dbg(&iwdev->ibdev, "INIT: Gen2 PF[%d] device probe success\n", PCI_FUNC(rf->pcidev->devfn));
dev_set_drvdata(&aux_dev->dev, iwdev);
auxiliary_set_drvdata(aux_dev, iwdev);
return 0;

8
drivers/infiniband/hw/mlx5/main.c
View File

@ -4422,7 +4422,7 @@ static int mlx5r_mp_probe(struct auxiliary_device *adev,
}
mutex_unlock(&mlx5_ib_multiport_mutex);
dev_set_drvdata(&adev->dev, mpi);
auxiliary_set_drvdata(adev, mpi);
return 0;
}
@ -4430,7 +4430,7 @@ static void mlx5r_mp_remove(struct auxiliary_device *adev)
{
struct mlx5_ib_multiport_info *mpi;
mpi = dev_get_drvdata(&adev->dev);
mpi = auxiliary_get_drvdata(adev);
mutex_lock(&mlx5_ib_multiport_mutex);
if (mpi->ibdev)
mlx5_ib_unbind_slave_port(mpi->ibdev, mpi);
@ -4480,7 +4480,7 @@ static int mlx5r_probe(struct auxiliary_device *adev,
return ret;
}
dev_set_drvdata(&adev->dev, dev);
auxiliary_set_drvdata(adev, dev);
return 0;
}
@ -4488,7 +4488,7 @@ static void mlx5r_remove(struct auxiliary_device *adev)
{
struct mlx5_ib_dev *dev;
dev = dev_get_drvdata(&adev->dev);
dev = auxiliary_get_drvdata(adev);
__mlx5_ib_remove(dev, dev->profile, MLX5_IB_STAGE_MAX);
}

10
drivers/mfd/Kconfig
View File

@ -696,16 +696,6 @@ config MFD_INTEL_PMC_BXT
Register and P-unit access. In addition this creates devices
for iTCO watchdog and telemetry that are part of the PMC.
config MFD_INTEL_PMT
tristate "Intel Platform Monitoring Technology (PMT) support"
depends on X86 && PCI
select MFD_CORE
help
The Intel Platform Monitoring Technology (PMT) is an interface that
provides access to hardware monitor registers. This driver supports
Telemetry, Watcher, and Crashlog PMT capabilities/devices for
platforms starting from Tiger Lake.
config MFD_IPAQ_MICRO
bool "Atmel Micro ASIC (iPAQ h3100/h3600/h3700) Support"
depends on SA1100_H3100 || SA1100_H3600

1
drivers/mfd/Makefile
View File

@ -211,7 +211,6 @@ obj-$(CONFIG_MFD_INTEL_LPSS) += intel-lpss.o
obj-$(CONFIG_MFD_INTEL_LPSS_PCI) += intel-lpss-pci.o
obj-$(CONFIG_MFD_INTEL_LPSS_ACPI) += intel-lpss-acpi.o
obj-$(CONFIG_MFD_INTEL_PMC_BXT) += intel_pmc_bxt.o
obj-$(CONFIG_MFD_INTEL_PMT) += intel_pmt.o
obj-$(CONFIG_MFD_PALMAS) += palmas.o
obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
obj-$(CONFIG_MFD_NTXEC) += ntxec.o

261
drivers/mfd/intel_pmt.c
View File

@ -1,261 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Intel Platform Monitoring Technology PMT driver
*
* Copyright (c) 2020, Intel Corporation.
* All Rights Reserved.
*
* Author: David E. Box <david.e.box@linux.intel.com>
*/
#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
/* Intel DVSEC capability vendor space offsets */
#define INTEL_DVSEC_ENTRIES 0xA
#define INTEL_DVSEC_SIZE 0xB
#define INTEL_DVSEC_TABLE 0xC
#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
#define INTEL_DVSEC_ENTRY_SIZE 4
/* PMT capabilities */
#define DVSEC_INTEL_ID_TELEMETRY 2
#define DVSEC_INTEL_ID_WATCHER 3
#define DVSEC_INTEL_ID_CRASHLOG 4
struct intel_dvsec_header {
u16 length;
u16 id;
u8 num_entries;
u8 entry_size;
u8 tbir;
u32 offset;
};
enum pmt_quirks {
/* Watcher capability not supported */
PMT_QUIRK_NO_WATCHER = BIT(0),
/* Crashlog capability not supported */
PMT_QUIRK_NO_CRASHLOG = BIT(1),
/* Use shift instead of mask to read discovery table offset */
PMT_QUIRK_TABLE_SHIFT = BIT(2),
/* DVSEC not present (provided in driver data) */
PMT_QUIRK_NO_DVSEC = BIT(3),
};
struct pmt_platform_info {
unsigned long quirks;
struct intel_dvsec_header **capabilities;
};
static const struct pmt_platform_info tgl_info = {
.quirks = PMT_QUIRK_NO_WATCHER | PMT_QUIRK_NO_CRASHLOG |
PMT_QUIRK_TABLE_SHIFT,
};
/* DG1 Platform with DVSEC quirk*/
static struct intel_dvsec_header dg1_telemetry = {
.length = 0x10,
.id = 2,
.num_entries = 1,
.entry_size = 3,
.tbir = 0,
.offset = 0x466000,
};
static struct intel_dvsec_header *dg1_capabilities[] = {
&dg1_telemetry,
NULL
};
static const struct pmt_platform_info dg1_info = {
.quirks = PMT_QUIRK_NO_DVSEC,
.capabilities = dg1_capabilities,
};
static int pmt_add_dev(struct pci_dev *pdev, struct intel_dvsec_header *header,
unsigned long quirks)
{
struct device *dev = &pdev->dev;
struct resource *res, *tmp;
struct mfd_cell *cell;
const char *name;
int count = header->num_entries;
int size = header->entry_size;
int id = header->id;
int i;
switch (id) {
case DVSEC_INTEL_ID_TELEMETRY:
name = "pmt_telemetry";
break;
case DVSEC_INTEL_ID_WATCHER:
if (quirks & PMT_QUIRK_NO_WATCHER) {
dev_info(dev, "Watcher not supported\n");
return -EINVAL;
}
name = "pmt_watcher";
break;
case DVSEC_INTEL_ID_CRASHLOG:
if (quirks & PMT_QUIRK_NO_CRASHLOG) {
dev_info(dev, "Crashlog not supported\n");
return -EINVAL;
}
name = "pmt_crashlog";
break;
default:
return -EINVAL;
}
if (!header->num_entries || !header->entry_size) {
dev_err(dev, "Invalid count or size for %s header\n", name);
return -EINVAL;
}
cell = devm_kzalloc(dev, sizeof(*cell), GFP_KERNEL);
if (!cell)
return -ENOMEM;
res = devm_kcalloc(dev, count, sizeof(*res), GFP_KERNEL);
if (!res)
return -ENOMEM;
if (quirks & PMT_QUIRK_TABLE_SHIFT)
header->offset >>= 3;
/*
* The PMT DVSEC contains the starting offset and count for a block of
* discovery tables, each providing access to monitoring facilities for
* a section of the device. Create a resource list of these tables to
* provide to the driver.
*/
for (i = 0, tmp = res; i < count; i++, tmp++) {
tmp->start = pdev->resource[header->tbir].start +
header->offset + i * (size << 2);
tmp->end = tmp->start + (size << 2) - 1;
tmp->flags = IORESOURCE_MEM;
}
cell->resources = res;
cell->num_resources = count;
cell->name = name;
return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cell, 1, NULL, 0,
NULL);
}
static int pmt_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct pmt_platform_info *info;
unsigned long quirks = 0;
bool found_devices = false;
int ret, pos = 0;
ret = pcim_enable_device(pdev);
if (ret)
return ret;
info = (struct pmt_platform_info *)id->driver_data;
if (info)
quirks = info->quirks;
if (info && (info->quirks & PMT_QUIRK_NO_DVSEC)) {
struct intel_dvsec_header **header;
header = info->capabilities;
while (*header) {
ret = pmt_add_dev(pdev, *header, quirks);
if (ret)
dev_warn(&pdev->dev,
"Failed to add device for DVSEC id %d\n",
(*header)->id);
else
found_devices = true;
++header;
}
} else {
do {
struct intel_dvsec_header header;
u32 table;
u16 vid;
pos = pci_find_next_ext_capability(pdev, pos, PCI_EXT_CAP_ID_DVSEC);
if (!pos)
break;
pci_read_config_word(pdev, pos + PCI_DVSEC_HEADER1, &vid);
if (vid != PCI_VENDOR_ID_INTEL)
continue;
pci_read_config_word(pdev, pos + PCI_DVSEC_HEADER2,
&header.id);
pci_read_config_byte(pdev, pos + INTEL_DVSEC_ENTRIES,
&header.num_entries);
pci_read_config_byte(pdev, pos + INTEL_DVSEC_SIZE,
&header.entry_size);
pci_read_config_dword(pdev, pos + INTEL_DVSEC_TABLE,
&table);
header.tbir = INTEL_DVSEC_TABLE_BAR(table);
header.offset = INTEL_DVSEC_TABLE_OFFSET(table);
ret = pmt_add_dev(pdev, &header, quirks);
if (ret)
continue;
found_devices = true;
} while (true);
}
if (!found_devices)
return -ENODEV;
pm_runtime_put(&pdev->dev);
pm_runtime_allow(&pdev->dev);
return 0;
}
static void pmt_pci_remove(struct pci_dev *pdev)
{
pm_runtime_forbid(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
}
#define PCI_DEVICE_ID_INTEL_PMT_ADL 0x467d
#define PCI_DEVICE_ID_INTEL_PMT_DG1 0x490e
#define PCI_DEVICE_ID_INTEL_PMT_OOBMSM 0x09a7
#define PCI_DEVICE_ID_INTEL_PMT_TGL 0x9a0d
static const struct pci_device_id pmt_pci_ids[] = {
{ PCI_DEVICE_DATA(INTEL, PMT_ADL, &tgl_info) },
{ PCI_DEVICE_DATA(INTEL, PMT_DG1, &dg1_info) },
{ PCI_DEVICE_DATA(INTEL, PMT_OOBMSM, NULL) },
{ PCI_DEVICE_DATA(INTEL, PMT_TGL, &tgl_info) },
{ }
};
MODULE_DEVICE_TABLE(pci, pmt_pci_ids);
static struct pci_driver pmt_pci_driver = {
.name = "intel-pmt",
.id_table = pmt_pci_ids,
.probe = pmt_pci_probe,
.remove = pmt_pci_remove,
};
module_pci_driver(pmt_pci_driver);
MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>");
MODULE_DESCRIPTION("Intel Platform Monitoring Technology PMT driver");
MODULE_LICENSE("GPL v2");

8
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -5534,7 +5534,7 @@ void mlx5e_destroy_netdev(struct mlx5e_priv *priv)
static int mlx5e_resume(struct auxiliary_device *adev)
{
struct mlx5_adev *edev = container_of(adev, struct mlx5_adev, adev);
struct mlx5e_priv *priv = dev_get_drvdata(&adev->dev);
struct mlx5e_priv *priv = auxiliary_get_drvdata(adev);
struct net_device *netdev = priv->netdev;
struct mlx5_core_dev *mdev = edev->mdev;
int err;
@ -5557,7 +5557,7 @@ static int mlx5e_resume(struct auxiliary_device *adev)
static int mlx5e_suspend(struct auxiliary_device *adev, pm_message_t state)
{
struct mlx5e_priv *priv = dev_get_drvdata(&adev->dev);
struct mlx5e_priv *priv = auxiliary_get_drvdata(adev);
struct net_device *netdev = priv->netdev;
struct mlx5_core_dev *mdev = priv->mdev;
@ -5589,7 +5589,7 @@ static int mlx5e_probe(struct auxiliary_device *adev,
mlx5e_build_nic_netdev(netdev);
priv = netdev_priv(netdev);
dev_set_drvdata(&adev->dev, priv);
auxiliary_set_drvdata(adev, priv);
priv->profile = profile;
priv->ppriv = NULL;
@ -5637,7 +5637,7 @@ err_destroy_netdev:
static void mlx5e_remove(struct auxiliary_device *adev)
{
struct mlx5e_priv *priv = dev_get_drvdata(&adev->dev);
struct mlx5e_priv *priv = auxiliary_get_drvdata(adev);
pm_message_t state = {};
mlx5e_dcbnl_delete_app(priv);

11
drivers/platform/x86/intel/Kconfig
View File

@ -170,3 +170,14 @@ config INTEL_UNCORE_FREQ_CONTROL
To compile this driver as a module, choose M here: the module
will be called intel-uncore-frequency.
config INTEL_VSEC
tristate "Intel Vendor Specific Extended Capabilities Driver"
depends on PCI
select AUXILIARY_BUS
help
Adds support for feature drivers exposed using Intel PCIe VSEC and
DVSEC.
To compile this driver as a module, choose M here: the module will
be called intel_vsec.

2
drivers/platform/x86/intel/Makefile
View File

@ -26,6 +26,8 @@ intel_int0002_vgpio-y := int0002_vgpio.o
obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
intel_oaktrail-y := oaktrail.o
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
intel_vsec-y := vsec.o
obj-$(CONFIG_INTEL_VSEC) += intel_vsec.o
# Intel PMIC / PMC / P-Unit drivers
intel_bxtwc_tmu-y := bxtwc_tmu.o

4
drivers/platform/x86/intel/pmt/Kconfig
View File

@ -17,7 +17,7 @@ config INTEL_PMT_CLASS
config INTEL_PMT_TELEMETRY
tristate "Intel Platform Monitoring Technology (PMT) Telemetry driver"
depends on MFD_INTEL_PMT
depends on INTEL_VSEC
select INTEL_PMT_CLASS
help
The Intel Platform Monitory Technology (PMT) Telemetry driver provides
@ -29,7 +29,7 @@ config INTEL_PMT_TELEMETRY
config INTEL_PMT_CRASHLOG
tristate "Intel Platform Monitoring Technology (PMT) Crashlog driver"
depends on MFD_INTEL_PMT
depends on INTEL_VSEC
select INTEL_PMT_CLASS
help
The Intel Platform Monitoring Technology (PMT) crashlog driver provides

21
drivers/platform/x86/intel/pmt/class.c
View File

@ -13,6 +13,7 @@
#include <linux/mm.h>
#include <linux/pci.h>
#include "../vsec.h"
#include "class.h"
#define PMT_XA_START 0
@ -281,31 +282,29 @@ fail_dev_create:
return ret;
}
int intel_pmt_dev_create(struct intel_pmt_entry *entry,
struct intel_pmt_namespace *ns,
struct platform_device *pdev, int idx)
int intel_pmt_dev_create(struct intel_pmt_entry *entry, struct intel_pmt_namespace *ns,
struct intel_vsec_device *intel_vsec_dev, int idx)
{
struct device *dev = &intel_vsec_dev->auxdev.dev;
struct intel_pmt_header header;
struct resource *disc_res;
int ret = -ENODEV;
int ret;
disc_res = platform_get_resource(pdev, IORESOURCE_MEM, idx);
if (!disc_res)
return ret;
disc_res = &intel_vsec_dev->resource[idx];
entry->disc_table = devm_platform_ioremap_resource(pdev, idx);
entry->disc_table = devm_ioremap_resource(dev, disc_res);
if (IS_ERR(entry->disc_table))
return PTR_ERR(entry->disc_table);
ret = ns->pmt_header_decode(entry, &header, &pdev->dev);
ret = ns->pmt_header_decode(entry, &header, dev);
if (ret)
return ret;
ret = intel_pmt_populate_entry(entry, &header, &pdev->dev, disc_res);
ret = intel_pmt_populate_entry(entry, &header, dev, disc_res);
if (ret)
return ret;
return intel_pmt_dev_register(entry, ns, &pdev->dev);
return intel_pmt_dev_register(entry, ns, dev);
}
EXPORT_SYMBOL_GPL(intel_pmt_dev_create);

5
drivers/platform/x86/intel/pmt/class.h
View File

@ -2,13 +2,14 @@
#ifndef _INTEL_PMT_CLASS_H
#define _INTEL_PMT_CLASS_H
#include <linux/platform_device.h>
#include <linux/xarray.h>
#include <linux/types.h>
#include <linux/bits.h>
#include <linux/err.h>
#include <linux/io.h>
#include "../vsec.h"
/* PMT access types */
#define ACCESS_BARID 2
#define ACCESS_LOCAL 3
@ -47,7 +48,7 @@ struct intel_pmt_namespace {
bool intel_pmt_is_early_client_hw(struct device *dev);
int intel_pmt_dev_create(struct intel_pmt_entry *entry,
struct intel_pmt_namespace *ns,
struct platform_device *pdev, int idx);
struct intel_vsec_device *dev, int idx);
void intel_pmt_dev_destroy(struct intel_pmt_entry *entry,
struct intel_pmt_namespace *ns);
#endif

47
drivers/platform/x86/intel/pmt/crashlog.c
View File

@ -8,6 +8,7 @@
* Author: "Alexander Duyck" <alexander.h.duyck@linux.intel.com>
*/
#include <linux/auxiliary_bus.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
@ -15,10 +16,9 @@
#include <linux/uaccess.h>
#include <linux/overflow.h>
#include "../vsec.h"
#include "class.h"
#define DRV_NAME "pmt_crashlog"
/* Crashlog discovery header types */
#define CRASH_TYPE_OOBMSM 1
@ -257,34 +257,34 @@ static struct intel_pmt_namespace pmt_crashlog_ns = {
/*
* initialization
*/
static int pmt_crashlog_remove(struct platform_device *pdev)
static void pmt_crashlog_remove(struct auxiliary_device *auxdev)
{
struct pmt_crashlog_priv *priv = platform_get_drvdata(pdev);
struct pmt_crashlog_priv *priv = auxiliary_get_drvdata(auxdev);
int i;
for (i = 0; i < priv->num_entries; i++)
intel_pmt_dev_destroy(&priv->entry[i].entry, &pmt_crashlog_ns);
return 0;
}
static int pmt_crashlog_probe(struct platform_device *pdev)
static int pmt_crashlog_probe(struct auxiliary_device *auxdev,
const struct auxiliary_device_id *id)
{
struct intel_vsec_device *intel_vsec_dev = auxdev_to_ivdev(auxdev);
struct pmt_crashlog_priv *priv;
size_t size;
int i, ret;
size = struct_size(priv, entry, pdev->num_resources);
priv = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
size = struct_size(priv, entry, intel_vsec_dev->num_resources);
priv = devm_kzalloc(&auxdev->dev, size, GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
auxiliary_set_drvdata(auxdev, priv);
for (i = 0; i < pdev->num_resources; i++) {
for (i = 0; i < intel_vsec_dev->num_resources; i++) {
struct intel_pmt_entry *entry = &priv->entry[i].entry;
ret = intel_pmt_dev_create(entry, &pmt_crashlog_ns, pdev, i);
ret = intel_pmt_dev_create(entry, &pmt_crashlog_ns, intel_vsec_dev, i);
if (ret < 0)
goto abort_probe;
if (ret)
@ -295,26 +295,30 @@ static int pmt_crashlog_probe(struct platform_device *pdev)
return 0;
abort_probe:
pmt_crashlog_remove(pdev);
pmt_crashlog_remove(auxdev);
return ret;
}
static struct platform_driver pmt_crashlog_driver = {
.driver = {
.name = DRV_NAME,
},
.remove = pmt_crashlog_remove,
.probe = pmt_crashlog_probe,
static const struct auxiliary_device_id pmt_crashlog_id_table[] = {
{ .name = "intel_vsec.crashlog" },
{}
};
MODULE_DEVICE_TABLE(auxiliary, pmt_crashlog_id_table);
static struct auxiliary_driver pmt_crashlog_aux_driver = {
.id_table = pmt_crashlog_id_table,
.remove = pmt_crashlog_remove,
.probe = pmt_crashlog_probe,
};
static int __init pmt_crashlog_init(void)
{
return platform_driver_register(&pmt_crashlog_driver);
return auxiliary_driver_register(&pmt_crashlog_aux_driver);
}
static void __exit pmt_crashlog_exit(void)
{
platform_driver_unregister(&pmt_crashlog_driver);
auxiliary_driver_unregister(&pmt_crashlog_aux_driver);
xa_destroy(&crashlog_array);
}
@ -323,5 +327,4 @@ module_exit(pmt_crashlog_exit);
MODULE_AUTHOR("Alexander Duyck <alexander.h.duyck@linux.intel.com>");
MODULE_DESCRIPTION("Intel PMT Crashlog driver");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_LICENSE("GPL v2");

46
drivers/platform/x86/intel/pmt/telemetry.c
View File

@ -8,6 +8,7 @@
* Author: "David E. Box" <david.e.box@linux.intel.com>
*/
#include <linux/auxiliary_bus.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
@ -15,10 +16,9 @@
#include <linux/uaccess.h>
#include <linux/overflow.h>
#include "../vsec.h"
#include "class.h"
#define TELEM_DEV_NAME "pmt_telemetry"
#define TELEM_SIZE_OFFSET 0x0
#define TELEM_GUID_OFFSET 0x4
#define TELEM_BASE_OFFSET 0x8
@ -79,34 +79,33 @@ static struct intel_pmt_namespace pmt_telem_ns = {
.pmt_header_decode = pmt_telem_header_decode,
};
static int pmt_telem_remove(struct platform_device *pdev)
static void pmt_telem_remove(struct auxiliary_device *auxdev)
{
struct pmt_telem_priv *priv = platform_get_drvdata(pdev);
struct pmt_telem_priv *priv = auxiliary_get_drvdata(auxdev);
int i;
for (i = 0; i < priv->num_entries; i++)
intel_pmt_dev_destroy(&priv->entry[i], &pmt_telem_ns);
return 0;
}
static int pmt_telem_probe(struct platform_device *pdev)
static int pmt_telem_probe(struct auxiliary_device *auxdev, const struct auxiliary_device_id *id)
{
struct intel_vsec_device *intel_vsec_dev = auxdev_to_ivdev(auxdev);
struct pmt_telem_priv *priv;
size_t size;
int i, ret;
size = struct_size(priv, entry, pdev->num_resources);
priv = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
size = struct_size(priv, entry, intel_vsec_dev->num_resources);
priv = devm_kzalloc(&auxdev->dev, size, GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
auxiliary_set_drvdata(auxdev, priv);
for (i = 0; i < pdev->num_resources; i++) {
for (i = 0; i < intel_vsec_dev->num_resources; i++) {
struct intel_pmt_entry *entry = &priv->entry[i];
ret = intel_pmt_dev_create(entry, &pmt_telem_ns, pdev, i);
ret = intel_pmt_dev_create(entry, &pmt_telem_ns, intel_vsec_dev, i);
if (ret < 0)
goto abort_probe;
if (ret)
@ -117,32 +116,35 @@ static int pmt_telem_probe(struct platform_device *pdev)
return 0;
abort_probe:
pmt_telem_remove(pdev);
pmt_telem_remove(auxdev);
return ret;
}
static struct platform_driver pmt_telem_driver = {
.driver = {
.name = TELEM_DEV_NAME,
},
.remove = pmt_telem_remove,
.probe = pmt_telem_probe,
static const struct auxiliary_device_id pmt_telem_id_table[] = {
{ .name = "intel_vsec.telemetry" },
{}
};
MODULE_DEVICE_TABLE(auxiliary, pmt_telem_id_table);
static struct auxiliary_driver pmt_telem_aux_driver = {
.id_table = pmt_telem_id_table,
.remove = pmt_telem_remove,
.probe = pmt_telem_probe,
};
static int __init pmt_telem_init(void)
{
return platform_driver_register(&pmt_telem_driver);
return auxiliary_driver_register(&pmt_telem_aux_driver);
}
module_init(pmt_telem_init);
static void __exit pmt_telem_exit(void)
{
platform_driver_unregister(&pmt_telem_driver);
auxiliary_driver_unregister(&pmt_telem_aux_driver);
xa_destroy(&telem_array);
}
module_exit(pmt_telem_exit);
MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>");
MODULE_DESCRIPTION("Intel PMT Telemetry driver");
MODULE_ALIAS("platform:" TELEM_DEV_NAME);
MODULE_LICENSE("GPL v2");

408
drivers/platform/x86/intel/vsec.c Normal file
View File

@ -0,0 +1,408 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Intel Vendor Specific Extended Capabilities auxiliary bus driver
*
* Copyright (c) 2021, Intel Corporation.
* All Rights Reserved.
*
* Author: David E. Box <david.e.box@linux.intel.com>
*
* This driver discovers and creates auxiliary devices for Intel defined PCIe
* "Vendor Specific" and "Designated Vendor Specific" Extended Capabilities,
* VSEC and DVSEC respectively. The driver supports features on specific PCIe
* endpoints that exist primarily to expose them.
*/
#include <linux/auxiliary_bus.h>
#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/idr.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/types.h>
#include "vsec.h"
/* Intel DVSEC offsets */
#define INTEL_DVSEC_ENTRIES 0xA
#define INTEL_DVSEC_SIZE 0xB
#define INTEL_DVSEC_TABLE 0xC
#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
#define TABLE_OFFSET_SHIFT 3
static DEFINE_IDA(intel_vsec_ida);
/**
* struct intel_vsec_header - Common fields of Intel VSEC and DVSEC registers.
* @rev: Revision ID of the VSEC/DVSEC register space
* @length: Length of the VSEC/DVSEC register space
* @id: ID of the feature
* @num_entries: Number of instances of the feature
* @entry_size: Size of the discovery table for each feature
* @tbir: BAR containing the discovery tables
* @offset: BAR offset of start of the first discovery table
*/
struct intel_vsec_header {
u8 rev;
u16 length;
u16 id;
u8 num_entries;
u8 entry_size;
u8 tbir;
u32 offset;
};
/* Platform specific data */
struct intel_vsec_platform_info {
struct intel_vsec_header **capabilities;
unsigned long quirks;
};
enum intel_vsec_id {
VSEC_ID_TELEMETRY = 2,
VSEC_ID_WATCHER = 3,
VSEC_ID_CRASHLOG = 4,
};
static enum intel_vsec_id intel_vsec_allow_list[] = {
VSEC_ID_TELEMETRY,
VSEC_ID_WATCHER,
VSEC_ID_CRASHLOG,
};
static const char *intel_vsec_name(enum intel_vsec_id id)
{
switch (id) {
case VSEC_ID_TELEMETRY:
return "telemetry";
case VSEC_ID_WATCHER:
return "watcher";
case VSEC_ID_CRASHLOG:
return "crashlog";
default:
return NULL;
}
}
static bool intel_vsec_allowed(u16 id)
{
int i;
for (i = 0; i < ARRAY_SIZE(intel_vsec_allow_list); i++)
if (intel_vsec_allow_list[i] == id)
return true;
return false;
}
static bool intel_vsec_disabled(u16 id, unsigned long quirks)
{
switch (id) {
case VSEC_ID_WATCHER:
return !!(quirks & VSEC_QUIRK_NO_WATCHER);
case VSEC_ID_CRASHLOG:
return !!(quirks & VSEC_QUIRK_NO_CRASHLOG);
default:
return false;
}
}
static void intel_vsec_remove_aux(void *data)
{
auxiliary_device_delete(data);
auxiliary_device_uninit(data);
}
static void intel_vsec_dev_release(struct device *dev)
{
struct intel_vsec_device *intel_vsec_dev = dev_to_ivdev(dev);
ida_free(intel_vsec_dev->ida, intel_vsec_dev->auxdev.id);
kfree(intel_vsec_dev->resource);
kfree(intel_vsec_dev);
}
static int intel_vsec_add_aux(struct pci_dev *pdev, struct intel_vsec_device *intel_vsec_dev,
const char *name)
{
struct auxiliary_device *auxdev = &intel_vsec_dev->auxdev;
int ret;
ret = ida_alloc(intel_vsec_dev->ida, GFP_KERNEL);
if (ret < 0) {
kfree(intel_vsec_dev);
return ret;
}
auxdev->id = ret;
auxdev->name = name;
auxdev->dev.parent = &pdev->dev;
auxdev->dev.release = intel_vsec_dev_release;
ret = auxiliary_device_init(auxdev);
if (ret < 0) {
ida_free(intel_vsec_dev->ida, auxdev->id);
kfree(intel_vsec_dev->resource);
kfree(intel_vsec_dev);
return ret;
}
ret = auxiliary_device_add(auxdev);
if (ret < 0) {
auxiliary_device_uninit(auxdev);
return ret;
}
return devm_add_action_or_reset(&pdev->dev, intel_vsec_remove_aux, auxdev);
}
static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *header,
unsigned long quirks)
{
struct intel_vsec_device *intel_vsec_dev;
struct resource *res, *tmp;
int i;
if (!intel_vsec_allowed(header->id) || intel_vsec_disabled(header->id, quirks))
return -EINVAL;
if (!header->num_entries) {
dev_dbg(&pdev->dev, "Invalid 0 entry count for header id %d\n", header->id);
return -EINVAL;
}
if (!header->entry_size) {
dev_dbg(&pdev->dev, "Invalid 0 entry size for header id %d\n", header->id);
return -EINVAL;
}
intel_vsec_dev = kzalloc(sizeof(*intel_vsec_dev), GFP_KERNEL);
if (!intel_vsec_dev)
return -ENOMEM;
res = kcalloc(header->num_entries, sizeof(*res), GFP_KERNEL);
if (!res) {
kfree(intel_vsec_dev);
return -ENOMEM;
}
if (quirks & VSEC_QUIRK_TABLE_SHIFT)
header->offset >>= TABLE_OFFSET_SHIFT;
/*
* The DVSEC/VSEC contains the starting offset and count for a block of
* discovery tables. Create a resource array of these tables to the
* auxiliary device driver.
*/
for (i = 0, tmp = res; i < header->num_entries; i++, tmp++) {
tmp->start = pdev->resource[header->tbir].start +
header->offset + i * (header->entry_size * sizeof(u32));
tmp->end = tmp->start + (header->entry_size * sizeof(u32)) - 1;
tmp->flags = IORESOURCE_MEM;
}
intel_vsec_dev->pcidev = pdev;
intel_vsec_dev->resource = res;
intel_vsec_dev->num_resources = header->num_entries;
intel_vsec_dev->quirks = quirks;
intel_vsec_dev->ida = &intel_vsec_ida;
return intel_vsec_add_aux(pdev, intel_vsec_dev, intel_vsec_name(header->id));
}
static bool intel_vsec_walk_header(struct pci_dev *pdev, unsigned long quirks,
struct intel_vsec_header **header)
{
bool have_devices = false;
int ret;
for ( ; *header; header++) {
ret = intel_vsec_add_dev(pdev, *header, quirks);
if (ret)
dev_info(&pdev->dev, "Could not add device for DVSEC id %d\n",
(*header)->id);
else
have_devices = true;
}
return have_devices;
}
static bool intel_vsec_walk_dvsec(struct pci_dev *pdev, unsigned long quirks)
{
bool have_devices = false;
int pos = 0;
do {
struct intel_vsec_header header;
u32 table, hdr;
u16 vid;
int ret;
pos = pci_find_next_ext_capability(pdev, pos, PCI_EXT_CAP_ID_DVSEC);
if (!pos)
break;
pci_read_config_dword(pdev, pos + PCI_DVSEC_HEADER1, &hdr);
vid = PCI_DVSEC_HEADER1_VID(hdr);
if (vid != PCI_VENDOR_ID_INTEL)
continue;
/* Support only revision 1 */
header.rev = PCI_DVSEC_HEADER1_REV(hdr);
if (header.rev != 1) {
dev_info(&pdev->dev, "Unsupported DVSEC revision %d\n", header.rev);
continue;
}
header.length = PCI_DVSEC_HEADER1_LEN(hdr);
pci_read_config_byte(pdev, pos + INTEL_DVSEC_ENTRIES, &header.num_entries);
pci_read_config_byte(pdev, pos + INTEL_DVSEC_SIZE, &header.entry_size);
pci_read_config_dword(pdev, pos + INTEL_DVSEC_TABLE, &table);
header.tbir = INTEL_DVSEC_TABLE_BAR(table);
header.offset = INTEL_DVSEC_TABLE_OFFSET(table);
pci_read_config_dword(pdev, pos + PCI_DVSEC_HEADER2, &hdr);
header.id = PCI_DVSEC_HEADER2_ID(hdr);
ret = intel_vsec_add_dev(pdev, &header, quirks);
if (ret)
continue;
have_devices = true;
} while (true);
return have_devices;
}
static bool intel_vsec_walk_vsec(struct pci_dev *pdev, unsigned long quirks)
{
bool have_devices = false;
int pos = 0;
do {
struct intel_vsec_header header;
u32 table, hdr;
int ret;
pos = pci_find_next_ext_capability(pdev, pos, PCI_EXT_CAP_ID_VNDR);
if (!pos)
break;
pci_read_config_dword(pdev, pos + PCI_VNDR_HEADER, &hdr);
/* Support only revision 1 */
header.rev = PCI_VNDR_HEADER_REV(hdr);
if (header.rev != 1) {
dev_info(&pdev->dev, "Unsupported VSEC revision %d\n", header.rev);
continue;
}
header.id = PCI_VNDR_HEADER_ID(hdr);
header.length = PCI_VNDR_HEADER_LEN(hdr);
/* entry, size, and table offset are the same as DVSEC */
pci_read_config_byte(pdev, pos + INTEL_DVSEC_ENTRIES, &header.num_entries);
pci_read_config_byte(pdev, pos + INTEL_DVSEC_SIZE, &header.entry_size);
pci_read_config_dword(pdev, pos + INTEL_DVSEC_TABLE, &table);
header.tbir = INTEL_DVSEC_TABLE_BAR(table);
header.offset = INTEL_DVSEC_TABLE_OFFSET(table);
ret = intel_vsec_add_dev(pdev, &header, quirks);
if (ret)
continue;
have_devices = true;
} while (true);
return have_devices;
}
static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct intel_vsec_platform_info *info;
bool have_devices = false;
unsigned long quirks = 0;
int ret;
ret = pcim_enable_device(pdev);
if (ret)
return ret;
info = (struct intel_vsec_platform_info *)id->driver_data;
if (info)
quirks = info->quirks;
if (intel_vsec_walk_dvsec(pdev, quirks))
have_devices = true;
if (intel_vsec_walk_vsec(pdev, quirks))
have_devices = true;
if (info && (info->quirks & VSEC_QUIRK_NO_DVSEC) &&
intel_vsec_walk_header(pdev, quirks, info->capabilities))
have_devices = true;
if (!have_devices)
return -ENODEV;
return 0;
}
/* TGL info */
static const struct intel_vsec_platform_info tgl_info = {
.quirks = VSEC_QUIRK_NO_WATCHER | VSEC_QUIRK_NO_CRASHLOG | VSEC_QUIRK_TABLE_SHIFT,
};
/* DG1 info */
static struct intel_vsec_header dg1_telemetry = {
.length = 0x10,
.id = 2,
.num_entries = 1,
.entry_size = 3,
.tbir = 0,
.offset = 0x466000,
};
static struct intel_vsec_header *dg1_capabilities[] = {
&dg1_telemetry,
NULL
};
static const struct intel_vsec_platform_info dg1_info = {
.capabilities = dg1_capabilities,
.quirks = VSEC_QUIRK_NO_DVSEC,
};
#define PCI_DEVICE_ID_INTEL_VSEC_ADL 0x467d
#define PCI_DEVICE_ID_INTEL_VSEC_DG1 0x490e
#define PCI_DEVICE_ID_INTEL_VSEC_OOBMSM 0x09a7
#define PCI_DEVICE_ID_INTEL_VSEC_TGL 0x9a0d
static const struct pci_device_id intel_vsec_pci_ids[] = {
{ PCI_DEVICE_DATA(INTEL, VSEC_ADL, &tgl_info) },
{ PCI_DEVICE_DATA(INTEL, VSEC_DG1, &dg1_info) },
{ PCI_DEVICE_DATA(INTEL, VSEC_OOBMSM, NULL) },
{ PCI_DEVICE_DATA(INTEL, VSEC_TGL, &tgl_info) },
{ }
};
MODULE_DEVICE_TABLE(pci, intel_vsec_pci_ids);
static struct pci_driver intel_vsec_pci_driver = {
.name = "intel_vsec",
.id_table = intel_vsec_pci_ids,
.probe = intel_vsec_pci_probe,
};
module_pci_driver(intel_vsec_pci_driver);
MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>");
MODULE_DESCRIPTION("Intel Extended Capabilities auxiliary bus driver");
MODULE_LICENSE("GPL v2");

43
drivers/platform/x86/intel/vsec.h Normal file
View File

@ -0,0 +1,43 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _VSEC_H
#define _VSEC_H
#include <linux/auxiliary_bus.h>
#include <linux/bits.h>
struct pci_dev;
struct resource;
enum intel_vsec_quirks {
/* Watcher feature not supported */
VSEC_QUIRK_NO_WATCHER = BIT(0),
/* Crashlog feature not supported */
VSEC_QUIRK_NO_CRASHLOG = BIT(1),
/* Use shift instead of mask to read discovery table offset */
VSEC_QUIRK_TABLE_SHIFT = BIT(2),
/* DVSEC not present (provided in driver data) */
VSEC_QUIRK_NO_DVSEC = BIT(3),
};
struct intel_vsec_device {
struct auxiliary_device auxdev;
struct pci_dev *pcidev;
struct resource *resource;
struct ida *ida;
unsigned long quirks;
int num_resources;
};
static inline struct intel_vsec_device *dev_to_ivdev(struct device *dev)
{
return container_of(dev, struct intel_vsec_device, auxdev.dev);
}
static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device *auxdev)
{
return container_of(auxdev, struct intel_vsec_device, auxdev);
}
#endif

8
drivers/soundwire/intel.c
View File

@ -1293,7 +1293,7 @@ static int intel_link_probe(struct auxiliary_device *auxdev,
bus->ops = &sdw_intel_ops;
/* set driver data, accessed by snd_soc_dai_get_drvdata() */
dev_set_drvdata(dev, cdns);
auxiliary_set_drvdata(auxdev, cdns);
/* use generic bandwidth allocation algorithm */
sdw->cdns.bus.compute_params = sdw_compute_params;
@ -1321,7 +1321,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
{
struct sdw_cdns_stream_config config;
struct device *dev = &auxdev->dev;
struct sdw_cdns *cdns = dev_get_drvdata(dev);
struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
struct sdw_intel *sdw = cdns_to_intel(cdns);
struct sdw_bus *bus = &cdns->bus;
int link_flags;
@ -1463,7 +1463,7 @@ err_init:
static void intel_link_remove(struct auxiliary_device *auxdev)
{
struct device *dev = &auxdev->dev;
struct sdw_cdns *cdns = dev_get_drvdata(dev);
struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
struct sdw_intel *sdw = cdns_to_intel(cdns);
struct sdw_bus *bus = &cdns->bus;
@ -1488,7 +1488,7 @@ int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
void __iomem *shim;
u16 wake_sts;
sdw = dev_get_drvdata(dev);
sdw = auxiliary_get_drvdata(auxdev);
bus = &sdw->cdns.bus;
if (bus->prop.hw_disabled || !sdw->startup_done) {

2
drivers/soundwire/intel_init.c
View File

@ -244,7 +244,7 @@ static struct sdw_intel_ctx
goto err;
link = &ldev->link_res;
link->cdns = dev_get_drvdata(&ldev->auxdev.dev);
link->cdns = auxiliary_get_drvdata(&ldev->auxdev);
if (!link->cdns) {
dev_err(&adev->dev, "failed to get link->cdns\n");

4
drivers/vdpa/mlx5/net/mlx5_vnet.c
View File

@ -2683,7 +2683,7 @@ static int mlx5v_probe(struct auxiliary_device *adev,
if (err)
goto reg_err;
dev_set_drvdata(&adev->dev, mgtdev);
auxiliary_set_drvdata(adev, mgtdev);
return 0;
@ -2696,7 +2696,7 @@ static void mlx5v_remove(struct auxiliary_device *adev)
{
struct mlx5_vdpa_mgmtdev *mgtdev;
mgtdev = dev_get_drvdata(&adev->dev);
mgtdev = auxiliary_get_drvdata(adev);
vdpa_mgmtdev_unregister(&mgtdev->mgtdev);
kfree(mgtdev);
}

2
fs/debugfs/file.c
View File

@ -147,7 +147,7 @@ static int debugfs_locked_down(struct inode *inode,
struct file *filp,
const struct file_operations *real_fops)
{
if ((inode->i_mode & 07777) == 0444 &&
if ((inode->i_mode & 07777 & ~0444) == 0 &&
!(filp->f_mode & FMODE_WRITE) &&
!real_fops->unlocked_ioctl &&
!real_fops->compat_ioctl &&

3
fs/dlm/lockspace.c
View File

@ -216,8 +216,7 @@ static int do_uevent(struct dlm_ls *ls, int in)
return ls->ls_uevent_result;
}
static int dlm_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
static int dlm_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
{
struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);

3
fs/gfs2/sys.c
View File

@ -767,8 +767,7 @@ void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
wait_for_completion(&sdp->sd_kobj_unregister);
}
static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
static int gfs2_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
{
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
struct super_block *s = sdp->sd_vfs;

118
fs/kernfs/dir.c
View File

@ -17,7 +17,6 @@
#include "kernfs-internal.h"
DECLARE_RWSEM(kernfs_rwsem);
static DEFINE_SPINLOCK(kernfs_rename_lock); /* kn->parent and ->name */
static char kernfs_pr_cont_buf[PATH_MAX]; /* protected by rename_lock */
static DEFINE_SPINLOCK(kernfs_idr_lock); /* root->ino_idr */
@ -26,7 +25,7 @@ static DEFINE_SPINLOCK(kernfs_idr_lock); /* root->ino_idr */
static bool kernfs_active(struct kernfs_node *kn)
{
lockdep_assert_held(&kernfs_rwsem);
lockdep_assert_held(&kernfs_root(kn)->kernfs_rwsem);
return atomic_read(&kn->active) >= 0;
}
@ -457,14 +456,15 @@ void kernfs_put_active(struct kernfs_node *kn)
* return after draining is complete.
*/
static void kernfs_drain(struct kernfs_node *kn)
__releases(&kernfs_rwsem) __acquires(&kernfs_rwsem)
__releases(&kernfs_root(kn)->kernfs_rwsem)
__acquires(&kernfs_root(kn)->kernfs_rwsem)
{
struct kernfs_root *root = kernfs_root(kn);
lockdep_assert_held_write(&kernfs_rwsem);
lockdep_assert_held_write(&root->kernfs_rwsem);
WARN_ON_ONCE(kernfs_active(kn));
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
if (kernfs_lockdep(kn)) {
rwsem_acquire(&kn->dep_map, 0, 0, _RET_IP_);
@ -483,7 +483,7 @@ static void kernfs_drain(struct kernfs_node *kn)
kernfs_drain_open_files(kn);
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
}
/**
@ -718,11 +718,12 @@ err_unlock:
int kernfs_add_one(struct kernfs_node *kn)
{
struct kernfs_node *parent = kn->parent;
struct kernfs_root *root = kernfs_root(parent);
struct kernfs_iattrs *ps_iattr;
bool has_ns;
int ret;
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
ret = -EINVAL;
has_ns = kernfs_ns_enabled(parent);
@ -753,7 +754,7 @@ int kernfs_add_one(struct kernfs_node *kn)
ps_iattr->ia_mtime = ps_iattr->ia_ctime;
}
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
/*
* Activate the new node unless CREATE_DEACTIVATED is requested.
@ -767,7 +768,7 @@ int kernfs_add_one(struct kernfs_node *kn)
return 0;
out_unlock:
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
return ret;
}
@ -788,7 +789,7 @@ static struct kernfs_node *kernfs_find_ns(struct kernfs_node *parent,
bool has_ns = kernfs_ns_enabled(parent);
unsigned int hash;
lockdep_assert_held(&kernfs_rwsem);
lockdep_assert_held(&kernfs_root(parent)->kernfs_rwsem);
if (has_ns != (bool)ns) {
WARN(1, KERN_WARNING "kernfs: ns %s in '%s' for '%s'\n",
@ -820,7 +821,7 @@ static struct kernfs_node *kernfs_walk_ns(struct kernfs_node *parent,
size_t len;
char *p, *name;
lockdep_assert_held_read(&kernfs_rwsem);
lockdep_assert_held_read(&kernfs_root(parent)->kernfs_rwsem);
/* grab kernfs_rename_lock to piggy back on kernfs_pr_cont_buf */
spin_lock_irq(&kernfs_rename_lock);
@ -859,11 +860,12 @@ struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
const char *name, const void *ns)
{
struct kernfs_node *kn;
struct kernfs_root *root = kernfs_root(parent);
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
kn = kernfs_find_ns(parent, name, ns);
kernfs_get(kn);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return kn;
}
@ -883,11 +885,12 @@ struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,
const char *path, const void *ns)
{
struct kernfs_node *kn;
struct kernfs_root *root = kernfs_root(parent);
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
kn = kernfs_walk_ns(parent, path, ns);
kernfs_get(kn);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return kn;
}
@ -912,6 +915,7 @@ struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
return ERR_PTR(-ENOMEM);
idr_init(&root->ino_idr);
init_rwsem(&root->kernfs_rwsem);
INIT_LIST_HEAD(&root->supers);
/*
@ -957,7 +961,13 @@ struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
*/
void kernfs_destroy_root(struct kernfs_root *root)
{
kernfs_remove(root->kn); /* will also free @root */
/*
* kernfs_remove holds kernfs_rwsem from the root so the root
* shouldn't be freed during the operation.
*/
kernfs_get(root->kn);
kernfs_remove(root->kn);
kernfs_put(root->kn); /* will also free @root */
}
/**
@ -1035,6 +1045,7 @@ struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent,
static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
{
struct kernfs_node *kn;
struct kernfs_root *root;
if (flags & LOOKUP_RCU)
return -ECHILD;
@ -1046,18 +1057,19 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
/* If the kernfs parent node has changed discard and
* proceed to ->lookup.
*/
down_read(&kernfs_rwsem);
spin_lock(&dentry->d_lock);
parent = kernfs_dentry_node(dentry->d_parent);
if (parent) {
spin_unlock(&dentry->d_lock);
root = kernfs_root(parent);
down_read(&root->kernfs_rwsem);
if (kernfs_dir_changed(parent, dentry)) {
spin_unlock(&dentry->d_lock);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return 0;
}
}
spin_unlock(&dentry->d_lock);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
} else
spin_unlock(&dentry->d_lock);
/* The kernfs parent node hasn't changed, leave the
* dentry negative and return success.
@ -1066,7 +1078,8 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
}
kn = kernfs_dentry_node(dentry);
down_read(&kernfs_rwsem);
root = kernfs_root(kn);
down_read(&root->kernfs_rwsem);
/* The kernfs node has been deactivated */
if (!kernfs_active(kn))
@ -1085,10 +1098,10 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
kernfs_info(dentry->d_sb)->ns != kn->ns)
goto out_bad;
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return 1;
out_bad:
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return 0;
}
@ -1102,10 +1115,12 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
{
struct kernfs_node *parent = dir->i_private;
struct kernfs_node *kn;
struct kernfs_root *root;
struct inode *inode = NULL;
const void *ns = NULL;
down_read(&kernfs_rwsem);
root = kernfs_root(parent);
down_read(&root->kernfs_rwsem);
if (kernfs_ns_enabled(parent))
ns = kernfs_info(dir->i_sb)->ns;
@ -1116,7 +1131,7 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
* create a negative.
*/
if (!kernfs_active(kn)) {
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return NULL;
}
inode = kernfs_get_inode(dir->i_sb, kn);
@ -1131,7 +1146,7 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
*/
if (!IS_ERR(inode))
kernfs_set_rev(parent, dentry);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
/* instantiate and hash (possibly negative) dentry */
return d_splice_alias(inode, dentry);
@ -1254,7 +1269,7 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
{
struct rb_node *rbn;
lockdep_assert_held_write(&kernfs_rwsem);
lockdep_assert_held_write(&kernfs_root(root)->kernfs_rwsem);
/* if first iteration, visit leftmost descendant which may be root */
if (!pos)
@ -1289,8 +1304,9 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
void kernfs_activate(struct kernfs_node *kn)
{
struct kernfs_node *pos;
struct kernfs_root *root = kernfs_root(kn);
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
pos = NULL;
while ((pos = kernfs_next_descendant_post(pos, kn))) {
@ -1304,14 +1320,14 @@ void kernfs_activate(struct kernfs_node *kn)
pos->flags |= KERNFS_ACTIVATED;
}
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
}
static void __kernfs_remove(struct kernfs_node *kn)
{
struct kernfs_node *pos;
lockdep_assert_held_write(&kernfs_rwsem);
lockdep_assert_held_write(&kernfs_root(kn)->kernfs_rwsem);
/*
* Short-circuit if non-root @kn has already finished removal.
@ -1381,9 +1397,11 @@ static void __kernfs_remove(struct kernfs_node *kn)
*/
void kernfs_remove(struct kernfs_node *kn)
{
down_write(&kernfs_rwsem);
struct kernfs_root *root = kernfs_root(kn);
down_write(&root->kernfs_rwsem);
__kernfs_remove(kn);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
}
/**
@ -1469,8 +1487,9 @@ void kernfs_unbreak_active_protection(struct kernfs_node *kn)
bool kernfs_remove_self(struct kernfs_node *kn)
{
bool ret;
struct kernfs_root *root = kernfs_root(kn);
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
kernfs_break_active_protection(kn);
/*
@ -1498,9 +1517,9 @@ bool kernfs_remove_self(struct kernfs_node *kn)
atomic_read(&kn->active) == KN_DEACTIVATED_BIAS)
break;
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
schedule();
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
}
finish_wait(waitq, &wait);
WARN_ON_ONCE(!RB_EMPTY_NODE(&kn->rb));
@ -1513,7 +1532,7 @@ bool kernfs_remove_self(struct kernfs_node *kn)
*/
kernfs_unbreak_active_protection(kn);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
return ret;
}
@ -1530,6 +1549,7 @@ int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
const void *ns)
{
struct kernfs_node *kn;
struct kernfs_root *root;
if (!parent) {
WARN(1, KERN_WARNING "kernfs: can not remove '%s', no directory\n",
@ -1537,13 +1557,14 @@ int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
return -ENOENT;
}
down_write(&kernfs_rwsem);
root = kernfs_root(parent);
down_write(&root->kernfs_rwsem);
kn = kernfs_find_ns(parent, name, ns);
if (kn)
__kernfs_remove(kn);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
if (kn)
return 0;
@ -1562,6 +1583,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
const char *new_name, const void *new_ns)
{
struct kernfs_node *old_parent;
struct kernfs_root *root;
const char *old_name = NULL;
int error;
@ -1569,7 +1591,8 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
if (!kn->parent)
return -EINVAL;
down_write(&kernfs_rwsem);
root = kernfs_root(kn);
down_write(&root->kernfs_rwsem);
error = -ENOENT;
if (!kernfs_active(kn) || !kernfs_active(new_parent) ||
@ -1623,7 +1646,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
error = 0;
out:
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
return error;
}
@ -1694,11 +1717,14 @@ static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
struct dentry *dentry = file->f_path.dentry;
struct kernfs_node *parent = kernfs_dentry_node(dentry);
struct kernfs_node *pos = file->private_data;
struct kernfs_root *root;
const void *ns = NULL;
if (!dir_emit_dots(file, ctx))
return 0;
down_read(&kernfs_rwsem);
root = kernfs_root(parent);
down_read(&root->kernfs_rwsem);
if (kernfs_ns_enabled(parent))
ns = kernfs_info(dentry->d_sb)->ns;
@ -1715,12 +1741,12 @@ static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
file->private_data = pos;
kernfs_get(pos);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
if (!dir_emit(ctx, name, len, ino, type))
return 0;
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
}
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
file->private_data = NULL;
ctx->pos = INT_MAX;
return 0;

6
fs/kernfs/file.c
View File

@ -847,6 +847,7 @@ static void kernfs_notify_workfn(struct work_struct *work)
{
struct kernfs_node *kn;
struct kernfs_super_info *info;
struct kernfs_root *root;
repeat:
/* pop one off the notify_list */
spin_lock_irq(&kernfs_notify_lock);
@ -859,8 +860,9 @@ repeat:
kn->attr.notify_next = NULL;
spin_unlock_irq(&kernfs_notify_lock);
root = kernfs_root(kn);
/* kick fsnotify */
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
list_for_each_entry(info, &kernfs_root(kn)->supers, node) {
struct kernfs_node *parent;
@ -898,7 +900,7 @@ repeat:
iput(inode);
}
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
kernfs_put(kn);
goto repeat;
}

22
fs/kernfs/inode.c
View File

@ -99,10 +99,11 @@ int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
{
int ret;
struct kernfs_root *root = kernfs_root(kn);
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
ret = __kernfs_setattr(kn, iattr);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
return ret;
}
@ -111,12 +112,14 @@ int kernfs_iop_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
{
struct inode *inode = d_inode(dentry);
struct kernfs_node *kn = inode->i_private;
struct kernfs_root *root;
int error;
if (!kn)
return -EINVAL;
down_write(&kernfs_rwsem);
root = kernfs_root(kn);
down_write(&root->kernfs_rwsem);
error = setattr_prepare(&init_user_ns, dentry, iattr);
if (error)
goto out;
@ -129,7 +132,7 @@ int kernfs_iop_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
setattr_copy(&init_user_ns, inode, iattr);
out:
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
return error;
}
@ -184,13 +187,14 @@ int kernfs_iop_getattr(struct user_namespace *mnt_userns,
{
struct inode *inode = d_inode(path->dentry);
struct kernfs_node *kn = inode->i_private;
struct kernfs_root *root = kernfs_root(kn);
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
spin_lock(&inode->i_lock);
kernfs_refresh_inode(kn, inode);
generic_fillattr(&init_user_ns, inode, stat);
spin_unlock(&inode->i_lock);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return 0;
}
@ -274,19 +278,21 @@ int kernfs_iop_permission(struct user_namespace *mnt_userns,
struct inode *inode, int mask)
{
struct kernfs_node *kn;
struct kernfs_root *root;
int ret;
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
kn = inode->i_private;
root = kernfs_root(kn);
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
spin_lock(&inode->i_lock);
kernfs_refresh_inode(kn, inode);
ret = generic_permission(&init_user_ns, inode, mask);
spin_unlock(&inode->i_lock);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return ret;
}

15
fs/kernfs/mount.c
View File

@ -236,6 +236,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *kfc)
{
struct kernfs_super_info *info = kernfs_info(sb);
struct kernfs_root *kf_root = kfc->root;
struct inode *inode;
struct dentry *root;
@ -255,9 +256,9 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k
sb->s_shrink.seeks = 0;
/* get root inode, initialize and unlock it */
down_read(&kernfs_rwsem);
down_read(&kf_root->kernfs_rwsem);
inode = kernfs_get_inode(sb, info->root->kn);
up_read(&kernfs_rwsem);
up_read(&kf_root->kernfs_rwsem);
if (!inode) {
pr_debug("kernfs: could not get root inode\n");
return -ENOMEM;
@ -334,6 +335,7 @@ int kernfs_get_tree(struct fs_context *fc)
if (!sb->s_root) {
struct kernfs_super_info *info = kernfs_info(sb);
struct kernfs_root *root = kfc->root;
kfc->new_sb_created = true;
@ -344,9 +346,9 @@ int kernfs_get_tree(struct fs_context *fc)
}
sb->s_flags |= SB_ACTIVE;
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
list_add(&info->node, &info->root->supers);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
}
fc->root = dget(sb->s_root);
@ -371,10 +373,11 @@ void kernfs_free_fs_context(struct fs_context *fc)
void kernfs_kill_sb(struct super_block *sb)
{
struct kernfs_super_info *info = kernfs_info(sb);
struct kernfs_root *root = info->root;
down_write(&kernfs_rwsem);
down_write(&root->kernfs_rwsem);
list_del(&info->node);
up_write(&kernfs_rwsem);
up_write(&root->kernfs_rwsem);
/*
* Remove the superblock from fs_supers/s_instances

5
fs/kernfs/symlink.c
View File

@ -113,11 +113,12 @@ static int kernfs_getlink(struct inode *inode, char *path)
struct kernfs_node *kn = inode->i_private;
struct kernfs_node *parent = kn->parent;
struct kernfs_node *target = kn->symlink.target_kn;
struct kernfs_root *root = kernfs_root(parent);
int error;
down_read(&kernfs_rwsem);
down_read(&root->kernfs_rwsem);
error = kernfs_get_target_path(parent, target, path);
up_read(&kernfs_rwsem);
up_read(&root->kernfs_rwsem);
return error;
}

13
fs/nilfs2/sysfs.c
View File

@ -57,7 +57,7 @@ static void nilfs_##name##_attr_release(struct kobject *kobj) \
complete(&subgroups->sg_##name##_kobj_unregister); \
} \
static struct kobj_type nilfs_##name##_ktype = { \
.default_attrs = nilfs_##name##_attrs, \
.default_groups = nilfs_##name##_groups, \
.sysfs_ops = &nilfs_##name##_attr_ops, \
.release = nilfs_##name##_attr_release, \
}
@ -129,6 +129,7 @@ static struct attribute *nilfs_snapshot_attrs[] = {
NILFS_SNAPSHOT_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_snapshot);
static ssize_t nilfs_snapshot_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
@ -166,7 +167,7 @@ static const struct sysfs_ops nilfs_snapshot_attr_ops = {
};
static struct kobj_type nilfs_snapshot_ktype = {
.default_attrs = nilfs_snapshot_attrs,
.default_groups = nilfs_snapshot_groups,
.sysfs_ops = &nilfs_snapshot_attr_ops,
.release = nilfs_snapshot_attr_release,
};
@ -226,6 +227,7 @@ static struct attribute *nilfs_mounted_snapshots_attrs[] = {
NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_mounted_snapshots);
NILFS_DEV_INT_GROUP_OPS(mounted_snapshots, dev);
NILFS_DEV_INT_GROUP_TYPE(mounted_snapshots, dev);
@ -339,6 +341,7 @@ static struct attribute *nilfs_checkpoints_attrs[] = {
NILFS_CHECKPOINTS_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_checkpoints);
NILFS_DEV_INT_GROUP_OPS(checkpoints, dev);
NILFS_DEV_INT_GROUP_TYPE(checkpoints, dev);
@ -428,6 +431,7 @@ static struct attribute *nilfs_segments_attrs[] = {
NILFS_SEGMENTS_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_segments);
NILFS_DEV_INT_GROUP_OPS(segments, dev);
NILFS_DEV_INT_GROUP_TYPE(segments, dev);
@ -689,6 +693,7 @@ static struct attribute *nilfs_segctor_attrs[] = {
NILFS_SEGCTOR_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_segctor);
NILFS_DEV_INT_GROUP_OPS(segctor, dev);
NILFS_DEV_INT_GROUP_TYPE(segctor, dev);
@ -816,6 +821,7 @@ static struct attribute *nilfs_superblock_attrs[] = {
NILFS_SUPERBLOCK_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_superblock);
NILFS_DEV_INT_GROUP_OPS(superblock, dev);
NILFS_DEV_INT_GROUP_TYPE(superblock, dev);
@ -924,6 +930,7 @@ static struct attribute *nilfs_dev_attrs[] = {
NILFS_DEV_ATTR_LIST(README),
NULL,
};
ATTRIBUTE_GROUPS(nilfs_dev);
static ssize_t nilfs_dev_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
@ -961,7 +968,7 @@ static const struct sysfs_ops nilfs_dev_attr_ops = {
};
static struct kobj_type nilfs_dev_ktype = {
.default_attrs = nilfs_dev_attrs,
.default_groups = nilfs_dev_groups,
.sysfs_ops = &nilfs_dev_attr_ops,
.release = nilfs_dev_attr_release,
};

174
include/linux/auxiliary_bus.h
View File

@ -11,12 +11,172 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
/**
* DOC: DEVICE_LIFESPAN
*
* The registering driver is the entity that allocates memory for the
* auxiliary_device and registers it on the auxiliary bus. It is important to
* note that, as opposed to the platform bus, the registering driver is wholly
* responsible for the management of the memory used for the device object.
*
* To be clear the memory for the auxiliary_device is freed in the release()
* callback defined by the registering driver. The registering driver should
* only call auxiliary_device_delete() and then auxiliary_device_uninit() when
* it is done with the device. The release() function is then automatically
* called if and when other code releases their reference to the devices.
*
* A parent object, defined in the shared header file, contains the
* auxiliary_device. It also contains a pointer to the shared object(s), which
* also is defined in the shared header. Both the parent object and the shared
* object(s) are allocated by the registering driver. This layout allows the
* auxiliary_driver's registering module to perform a container_of() call to go
* from the pointer to the auxiliary_device, that is passed during the call to
* the auxiliary_driver's probe function, up to the parent object, and then
* have access to the shared object(s).
*
* The memory for the shared object(s) must have a lifespan equal to, or
* greater than, the lifespan of the memory for the auxiliary_device. The
* auxiliary_driver should only consider that the shared object is valid as
* long as the auxiliary_device is still registered on the auxiliary bus. It
* is up to the registering driver to manage (e.g. free or keep available) the
* memory for the shared object beyond the life of the auxiliary_device.
*
* The registering driver must unregister all auxiliary devices before its own
* driver.remove() is completed. An easy way to ensure this is to use the
* devm_add_action_or_reset() call to register a function against the parent
* device which unregisters the auxiliary device object(s).
*
* Finally, any operations which operate on the auxiliary devices must continue
* to function (if only to return an error) after the registering driver
* unregisters the auxiliary device.
*/
/**
* struct auxiliary_device - auxiliary device object.
* @dev: Device,
* The release and parent fields of the device structure must be filled
* in
* @name: Match name found by the auxiliary device driver,
* @id: unique identitier if multiple devices of the same name are exported,
*
* An auxiliary_device represents a part of its parent device's functionality.
* It is given a name that, combined with the registering drivers
* KBUILD_MODNAME, creates a match_name that is used for driver binding, and an
* id that combined with the match_name provide a unique name to register with
* the bus subsystem. For example, a driver registering an auxiliary device is
* named 'foo_mod.ko' and the subdevice is named 'foo_dev'. The match name is
* therefore 'foo_mod.foo_dev'.
*
* Registering an auxiliary_device is a three-step process.
*
* First, a 'struct auxiliary_device' needs to be defined or allocated for each
* sub-device desired. The name, id, dev.release, and dev.parent fields of
* this structure must be filled in as follows.
*
* The 'name' field is to be given a name that is recognized by the auxiliary
* driver. If two auxiliary_devices with the same match_name, eg
* "foo_mod.foo_dev", are registered onto the bus, they must have unique id
* values (e.g. "x" and "y") so that the registered devices names are
* "foo_mod.foo_dev.x" and "foo_mod.foo_dev.y". If match_name + id are not
* unique, then the device_add fails and generates an error message.
*
* The auxiliary_device.dev.type.release or auxiliary_device.dev.release must
* be populated with a non-NULL pointer to successfully register the
* auxiliary_device. This release call is where resources associated with the
* auxiliary device must be free'ed. Because once the device is placed on the
* bus the parent driver can not tell what other code may have a reference to
* this data.
*
* The auxiliary_device.dev.parent should be set. Typically to the registering
* drivers device.
*
* Second, call auxiliary_device_init(), which checks several aspects of the
* auxiliary_device struct and performs a device_initialize(). After this step
* completes, any error state must have a call to auxiliary_device_uninit() in
* its resolution path.
*
* The third and final step in registering an auxiliary_device is to perform a
* call to auxiliary_device_add(), which sets the name of the device and adds
* the device to the bus.
*
* .. code-block:: c
*
* #define MY_DEVICE_NAME "foo_dev"
*
* ...
*
* struct auxiliary_device *my_aux_dev = my_aux_dev_alloc(xxx);
*
* // Step 1:
* my_aux_dev->name = MY_DEVICE_NAME;
* my_aux_dev->id = my_unique_id_alloc(xxx);
* my_aux_dev->dev.release = my_aux_dev_release;
* my_aux_dev->dev.parent = my_dev;
*
* // Step 2:
* if (auxiliary_device_init(my_aux_dev))
* goto fail;
*
* // Step 3:
* if (auxiliary_device_add(my_aux_dev)) {
* auxiliary_device_uninit(my_aux_dev);
* goto fail;
* }
*
* ...
*
*
* Unregistering an auxiliary_device is a two-step process to mirror the
* register process. First call auxiliary_device_delete(), then call
* auxiliary_device_uninit().
*
* .. code-block:: c
*
* auxiliary_device_delete(my_dev->my_aux_dev);
* auxiliary_device_uninit(my_dev->my_aux_dev);
*/
struct auxiliary_device {
struct device dev;
const char *name;
u32 id;
};
/**
* struct auxiliary_driver - Definition of an auxiliary bus driver
* @probe: Called when a matching device is added to the bus.
* @remove: Called when device is removed from the bus.
* @shutdown: Called at shut-down time to quiesce the device.
* @suspend: Called to put the device to sleep mode. Usually to a power state.
* @resume: Called to bring a device from sleep mode.
* @name: Driver name.
* @driver: Core driver structure.
* @id_table: Table of devices this driver should match on the bus.
*
* Auxiliary drivers follow the standard driver model convention, where
* discovery/enumeration is handled by the core, and drivers provide probe()
* and remove() methods. They support power management and shutdown
* notifications using the standard conventions.
*
* Auxiliary drivers register themselves with the bus by calling
* auxiliary_driver_register(). The id_table contains the match_names of
* auxiliary devices that a driver can bind with.
*
* .. code-block:: c
*
* static const struct auxiliary_device_id my_auxiliary_id_table[] = {
* { .name = "foo_mod.foo_dev" },
* {},
* };
*
* MODULE_DEVICE_TABLE(auxiliary, my_auxiliary_id_table);
*
* struct auxiliary_driver my_drv = {
* .name = "myauxiliarydrv",
* .id_table = my_auxiliary_id_table,
* .probe = my_drv_probe,
* .remove = my_drv_remove
* };
*/
struct auxiliary_driver {
int (*probe)(struct auxiliary_device *auxdev, const struct auxiliary_device_id *id);
void (*remove)(struct auxiliary_device *auxdev);
@ -28,6 +188,16 @@ struct auxiliary_driver {
const struct auxiliary_device_id *id_table;
};
static inline void *auxiliary_get_drvdata(struct auxiliary_device *auxdev)
{
return dev_get_drvdata(&auxdev->dev);
}
static inline void auxiliary_set_drvdata(struct auxiliary_device *auxdev, void *data)
{
dev_set_drvdata(&auxdev->dev, data);
}
static inline struct auxiliary_device *to_auxiliary_dev(struct device *dev)
{
return container_of(dev, struct auxiliary_device, dev);
@ -66,6 +236,10 @@ void auxiliary_driver_unregister(struct auxiliary_driver *auxdrv);
* Helper macro for auxiliary drivers which do not do anything special in
* module init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
*
* .. code-block:: c
*
* module_auxiliary_driver(my_drv);
*/
#define module_auxiliary_driver(__auxiliary_driver) \
module_driver(__auxiliary_driver, auxiliary_driver_register, auxiliary_driver_unregister)

6
include/linux/kernfs.h
View File

@ -6,7 +6,6 @@
#ifndef __LINUX_KERNFS_H
#define __LINUX_KERNFS_H
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/list.h>
#include <linux/mutex.h>
@ -14,14 +13,18 @@
#include <linux/lockdep.h>
#include <linux/rbtree.h>
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/types.h>
#include <linux/uidgid.h>
#include <linux/wait.h>
#include <linux/rwsem.h>
struct file;
struct dentry;
struct iattr;
struct seq_file;
struct vm_area_struct;
struct vm_operations_struct;
struct super_block;
struct file_system_type;
struct poll_table_struct;
@ -197,6 +200,7 @@ struct kernfs_root {
struct list_head supers;
wait_queue_head_t deactivate_waitq;
struct rw_semaphore kernfs_rwsem;
};
struct kernfs_open_file {

34
include/linux/kobject.h
View File

@ -19,10 +19,10 @@
#include <linux/list.h>
#include <linux/sysfs.h>
#include <linux/compiler.h>
#include <linux/container_of.h>
#include <linux/spinlock.h>
#include <linux/kref.h>
#include <linux/kobject_ns.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/atomic.h>
#include <linux/workqueue.h>
@ -66,7 +66,7 @@ struct kobject {
struct list_head entry;
struct kobject *parent;
struct kset *kset;
struct kobj_type *ktype;
const struct kobj_type *ktype;
struct kernfs_node *sd; /* sysfs directory entry */
struct kref kref;
#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
@ -90,13 +90,13 @@ static inline const char *kobject_name(const struct kobject *kobj)
return kobj->name;
}
extern void kobject_init(struct kobject *kobj, struct kobj_type *ktype);
extern void kobject_init(struct kobject *kobj, const struct kobj_type *ktype);
extern __printf(3, 4) __must_check
int kobject_add(struct kobject *kobj, struct kobject *parent,
const char *fmt, ...);
extern __printf(4, 5) __must_check
int kobject_init_and_add(struct kobject *kobj,
struct kobj_type *ktype, struct kobject *parent,
const struct kobj_type *ktype, struct kobject *parent,
const char *fmt, ...);
extern void kobject_del(struct kobject *kobj);
@ -117,23 +117,6 @@ extern void kobject_get_ownership(struct kobject *kobj,
kuid_t *uid, kgid_t *gid);
extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);
/**
* kobject_has_children - Returns whether a kobject has children.
* @kobj: the object to test
*
* This will return whether a kobject has other kobjects as children.
*
* It does NOT account for the presence of attribute files, only sub
* directories. It also assumes there is no concurrent addition or
* removal of such children, and thus relies on external locking.
*/
static inline bool kobject_has_children(struct kobject *kobj)
{
WARN_ON_ONCE(kref_read(&kobj->kref) == 0);
return kobj->sd && kobj->sd->dir.subdirs;
}
struct kobj_type {
void (*release)(struct kobject *kobj);
const struct sysfs_ops *sysfs_ops;
@ -153,10 +136,9 @@ struct kobj_uevent_env {
};
struct kset_uevent_ops {
int (* const filter)(struct kset *kset, struct kobject *kobj);
const char *(* const name)(struct kset *kset, struct kobject *kobj);
int (* const uevent)(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env);
int (* const filter)(struct kobject *kobj);
const char *(* const name)(struct kobject *kobj);
int (* const uevent)(struct kobject *kobj, struct kobj_uevent_env *env);
};
struct kobj_attribute {
@ -217,7 +199,7 @@ static inline void kset_put(struct kset *k)
kobject_put(&k->kobj);
}
static inline struct kobj_type *get_ktype(struct kobject *kobj)
static inline const struct kobj_type *get_ktype(struct kobject *kobj)
{
return kobj->ktype;
}

25
include/linux/topology.h
View File

@ -180,6 +180,19 @@ static inline int cpu_to_mem(int cpu)
#endif /* [!]CONFIG_HAVE_MEMORYLESS_NODES */
#if defined(topology_die_id) && defined(topology_die_cpumask)
#define TOPOLOGY_DIE_SYSFS
#endif
#if defined(topology_cluster_id) && defined(topology_cluster_cpumask)
#define TOPOLOGY_CLUSTER_SYSFS
#endif
#if defined(topology_book_id) && defined(topology_book_cpumask)
#define TOPOLOGY_BOOK_SYSFS
#endif
#if defined(topology_drawer_id) && defined(topology_drawer_cpumask)
#define TOPOLOGY_DRAWER_SYSFS
#endif
#ifndef topology_physical_package_id
#define topology_physical_package_id(cpu) ((void)(cpu), -1)
#endif
@ -192,6 +205,12 @@ static inline int cpu_to_mem(int cpu)
#ifndef topology_core_id
#define topology_core_id(cpu) ((void)(cpu), 0)
#endif
#ifndef topology_book_id
#define topology_book_id(cpu) ((void)(cpu), -1)
#endif
#ifndef topology_drawer_id
#define topology_drawer_id(cpu) ((void)(cpu), -1)
#endif
#ifndef topology_sibling_cpumask
#define topology_sibling_cpumask(cpu) cpumask_of(cpu)
#endif
@ -204,6 +223,12 @@ static inline int cpu_to_mem(int cpu)
#ifndef topology_die_cpumask
#define topology_die_cpumask(cpu) cpumask_of(cpu)
#endif
#ifndef topology_book_cpumask
#define topology_book_cpumask(cpu) cpumask_of(cpu)
#endif
#ifndef topology_drawer_cpumask
#define topology_drawer_cpumask(cpu) cpumask_of(cpu)
#endif
#if defined(CONFIG_SCHED_SMT) && !defined(cpu_smt_mask)
static inline const struct cpumask *cpu_smt_mask(int cpu)

4
include/uapi/linux/pci_regs.h
View File

@ -1086,7 +1086,11 @@
/* Designated Vendor-Specific (DVSEC, PCI_EXT_CAP_ID_DVSEC) */
#define PCI_DVSEC_HEADER1 0x4 /* Designated Vendor-Specific Header1 */
#define PCI_DVSEC_HEADER1_VID(x) ((x) & 0xffff)
#define PCI_DVSEC_HEADER1_REV(x) (((x) >> 16) & 0xf)
#define PCI_DVSEC_HEADER1_LEN(x) (((x) >> 20) & 0xfff)
#define PCI_DVSEC_HEADER2 0x8 /* Designated Vendor-Specific Header2 */
#define PCI_DVSEC_HEADER2_ID(x) ((x) & 0xffff)
/* Data Link Feature */
#define PCI_DLF_CAP 0x04 /* Capabilities Register */

4
kernel/params.c
View File

@ -926,9 +926,9 @@ static const struct sysfs_ops module_sysfs_ops = {
.store = module_attr_store,
};
static int uevent_filter(struct kset *kset, struct kobject *kobj)
static int uevent_filter(struct kobject *kobj)
{
struct kobj_type *ktype = get_ktype(kobj);
const struct kobj_type *ktype = get_ktype(kobj);
if (ktype == &module_ktype)
return 1;

8
lib/kobject.c
View File

@ -65,7 +65,7 @@ void kobject_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid)
*/
static int populate_dir(struct kobject *kobj)
{
struct kobj_type *t = get_ktype(kobj);
const struct kobj_type *t = get_ktype(kobj);
struct attribute *attr;
int error = 0;
int i;
@ -346,7 +346,7 @@ EXPORT_SYMBOL(kobject_set_name);
* to kobject_put(), not by a call to kfree directly to ensure that all of
* the memory is cleaned up properly.
*/
void kobject_init(struct kobject *kobj, struct kobj_type *ktype)
void kobject_init(struct kobject *kobj, const struct kobj_type *ktype)
{
char *err_str;
@ -461,7 +461,7 @@ EXPORT_SYMBOL(kobject_add);
* same type of error handling after a call to kobject_add() and kobject
* lifetime rules are the same here.
*/
int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype,
int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype,
struct kobject *parent, const char *fmt, ...)
{
va_list args;
@ -679,7 +679,7 @@ EXPORT_SYMBOL(kobject_get_unless_zero);
static void kobject_cleanup(struct kobject *kobj)
{
struct kobject *parent = kobj->parent;
struct kobj_type *t = get_ktype(kobj);
const struct kobj_type *t = get_ktype(kobj);
const char *name = kobj->name;
pr_debug("kobject: '%s' (%p): %s, parent %p\n",

6
lib/kobject_uevent.c
View File

@ -501,7 +501,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
}
/* skip the event, if the filter returns zero. */
if (uevent_ops && uevent_ops->filter)
if (!uevent_ops->filter(kset, kobj)) {
if (!uevent_ops->filter(kobj)) {
pr_debug("kobject: '%s' (%p): %s: filter function "
"caused the event to drop!\n",
kobject_name(kobj), kobj, __func__);
@ -510,7 +510,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
/* originating subsystem */
if (uevent_ops && uevent_ops->name)
subsystem = uevent_ops->name(kset, kobj);
subsystem = uevent_ops->name(kobj);
else
subsystem = kobject_name(&kset->kobj);
if (!subsystem) {
@ -554,7 +554,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
/* let the kset specific function add its stuff */
if (uevent_ops && uevent_ops->uevent) {
retval = uevent_ops->uevent(kset, kobj, env);
retval = uevent_ops->uevent(kobj, env);
if (retval) {
pr_debug("kobject: '%s' (%p): %s: uevent() returned "
"%d\n", kobject_name(kobj), kobj,