redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

ACPI: convert to sysfs framework 

Setup new sysfs framework

1.	Remove /sys/firmware/acpi
2.	Add ACPI device in device tree.

File "eject" for every device that has _EJ0 method is moved from
/sys/firmware to /sys/devices.
Operation on this file is exactly the same as before.
i.e. echo 1 to "eject" will cause hot removal of this device.
Corresponding changes should be made in userspace for hot removal.

Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Zhang Rui<rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
hifive-unleashed-5.1
Patrick Mochel 2006-12-07 20:56:38 +08:00 committed by Len Brown
parent a7178df5e7
commit f883d9db00
5 changed files with 49 additions and 155 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/bus.c
View File

@ -195,7 +195,7 @@ int acpi_bus_set_power(acpi_handle handle, int state)
if (!device->flags.power_manageable) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n",
device->kobj.name));
device->dev.kobj.name));
return -ENODEV;
}
/*

6
drivers/acpi/container.c
View File

@ -168,7 +168,7 @@ static void container_notify_cb(acpi_handle handle, u32 type, void *context)
if (ACPI_FAILURE(status) || !device) {
result = container_device_add(&device, handle);
if (!result)
kobject_uevent(&device->kobj,
kobject_uevent(&device->dev.kobj,
KOBJ_ONLINE);
else
printk("Failed to add container\n");
@ -176,13 +176,13 @@ static void container_notify_cb(acpi_handle handle, u32 type, void *context)
} else {
if (ACPI_SUCCESS(status)) {
/* device exist and this is a remove request */
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
}
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
if (!acpi_bus_get_device(handle, &device) && device) {
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
}
break;
default:

8
drivers/acpi/processor_core.c
View File

@ -711,7 +711,7 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
return -ENODEV;
if ((pr->id >= 0) && (pr->id < NR_CPUS)) {
kobject_uevent(&(*device)->kobj, KOBJ_ONLINE);
kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE);
}
return 0;
}
@ -749,13 +749,13 @@ acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data)
}
if (pr->id >= 0 && (pr->id < NR_CPUS)) {
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
break;
}
result = acpi_processor_start(device);
if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) {
kobject_uevent(&device->kobj, KOBJ_ONLINE);
kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
} else {
printk(KERN_ERR PREFIX "Device [%s] failed to start\n",
acpi_device_bid(device));
@ -778,7 +778,7 @@ acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data)
}
if ((pr->id < NR_CPUS) && (cpu_present(pr->id)))
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,

187
drivers/acpi/scan.c
View File

@ -24,126 +24,6 @@ static LIST_HEAD(acpi_device_list);
DEFINE_SPINLOCK(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
static void acpi_device_release_legacy(struct kobject *kobj)
{
struct acpi_device *dev = container_of(kobj, struct acpi_device, kobj);
kfree(dev->pnp.cid_list);
kfree(dev);
}
struct acpi_device_attribute {
struct attribute attr;
ssize_t(*show) (struct acpi_device *, char *);
ssize_t(*store) (struct acpi_device *, const char *, size_t);
};
typedef void acpi_device_sysfs_files(struct kobject *,
const struct attribute *);
static void setup_sys_fs_device_files(struct acpi_device *dev,
acpi_device_sysfs_files * func);
#define create_sysfs_device_files(dev) \
setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file)
#define remove_sysfs_device_files(dev) \
setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file)
#define to_acpi_dev(n) container_of(n, struct acpi_device, kobj)
#define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr);
static ssize_t acpi_device_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct acpi_device *device = to_acpi_dev(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->show ? attribute->show(device, buf) : -EIO;
}
static ssize_t acpi_device_attr_store(struct kobject *kobj,
struct attribute *attr, const char *buf,
size_t len)
{
struct acpi_device *device = to_acpi_dev(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->store ? attribute->store(device, buf, len) : -EIO;
}
static struct sysfs_ops acpi_device_sysfs_ops = {
.show = acpi_device_attr_show,
.store = acpi_device_attr_store,
};
static struct kobj_type ktype_acpi_ns = {
.sysfs_ops = &acpi_device_sysfs_ops,
.release = acpi_device_release_legacy,
};
static int namespace_uevent(struct kset *kset, struct kobject *kobj,
char **envp, int num_envp, char *buffer,
int buffer_size)
{
struct acpi_device *dev = to_acpi_dev(kobj);
int i = 0;
int len = 0;
if (!dev->driver)
return 0;
if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
"PHYSDEVDRIVER=%s", dev->driver->name))
return -ENOMEM;
envp[i] = NULL;
return 0;
}
static struct kset_uevent_ops namespace_uevent_ops = {
.uevent = &namespace_uevent,
};
static struct kset acpi_namespace_kset = {
.kobj = {
.name = "namespace",
},
.subsys = &acpi_subsys,
.ktype = &ktype_acpi_ns,
.uevent_ops = &namespace_uevent_ops,
};
/* --------------------------------------------------------------------------
ACPI sysfs device file support
-------------------------------------------------------------------------- */
static ssize_t acpi_eject_store(struct acpi_device *device,
const char *buf, size_t count);
#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
static struct acpi_device_attribute acpi_device_attr_##_name = \
__ATTR(_name, _mode, _show, _store)
ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
/**
* setup_sys_fs_device_files - sets up the device files under device namespace
* @dev: acpi_device object
* @func: function pointer to create or destroy the device file
*/
static void
setup_sys_fs_device_files(struct acpi_device *dev,
acpi_device_sysfs_files * func)
{
acpi_status status;
acpi_handle temp = NULL;
/*
* If device has _EJ0, 'eject' file is created that is used to trigger
* hot-removal function from userland.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
(*(func)) (&dev->kobj, &acpi_device_attr_eject.attr);
}
static int acpi_eject_operation(acpi_handle handle, int lockable)
{
struct acpi_object_list arg_list;
@ -180,7 +60,8 @@ static int acpi_eject_operation(acpi_handle handle, int lockable)
}
static ssize_t
acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
acpi_eject_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t count)
{
int result;
int ret = count;
@ -188,26 +69,27 @@ acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
acpi_status status;
acpi_handle handle;
acpi_object_type type = 0;
struct acpi_device *acpi_device = to_acpi_device(d);
if ((!count) || (buf[0] != '1')) {
return -EINVAL;
}
#ifndef FORCE_EJECT
if (device->driver == NULL) {
if (acpi_device->driver == NULL) {
ret = -ENODEV;
goto err;
}
#endif
status = acpi_get_type(device->handle, &type);
if (ACPI_FAILURE(status) || (!device->flags.ejectable)) {
status = acpi_get_type(acpi_device->handle, &type);
if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
ret = -ENODEV;
goto err;
}
islockable = device->flags.lockable;
handle = device->handle;
islockable = acpi_device->flags.lockable;
handle = acpi_device->handle;
result = acpi_bus_trim(device, 1);
result = acpi_bus_trim(acpi_device, 1);
if (!result)
result = acpi_eject_operation(handle, islockable);
@ -219,6 +101,35 @@ acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
return ret;
}
static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
static void acpi_device_setup_files(struct acpi_device *dev)
{
acpi_status status;
acpi_handle temp;
/*
* If device has _EJ0, 'eject' file is created that is used to trigger
* hot-removal function from userland.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
device_create_file(&dev->dev, &dev_attr_eject);
}
static void acpi_device_remove_files(struct acpi_device *dev)
{
acpi_status status;
acpi_handle temp;
/*
* If device has _EJ0, 'eject' file is created that is used to trigger
* hot-removal function from userland.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
device_remove_file(&dev->dev, &dev_attr_eject);
}
/* --------------------------------------------------------------------------
ACPI Bus operations
-------------------------------------------------------------------------- */
@ -353,8 +264,6 @@ static struct bus_type acpi_bus_type = {
static void acpi_device_register(struct acpi_device *device,
struct acpi_device *parent)
{
int err;
/*
* Linkage
* -------
@ -375,17 +284,6 @@ static void acpi_device_register(struct acpi_device *device,
list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
spin_unlock(&acpi_device_lock);
strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN);
if (parent)
device->kobj.parent = &parent->kobj;
device->kobj.ktype = &ktype_acpi_ns;
device->kobj.kset = &acpi_namespace_kset;
err = kobject_register(&device->kobj);
if (err < 0)
printk(KERN_WARNING "%s: kobject_register error: %d\n",
__FUNCTION__, err);
create_sysfs_device_files(device);
if (device->parent)
device->dev.parent = &parent->dev;
device->dev.bus = &acpi_bus_type;
@ -393,6 +291,8 @@ static void acpi_device_register(struct acpi_device *device,
sprintf(device->dev.bus_id, "%s", device->pnp.bus_id);
device->dev.release = &acpi_device_release;
device_add(&device->dev);
acpi_device_setup_files(device);
}
static void acpi_device_unregister(struct acpi_device *device, int type)
@ -409,9 +309,8 @@ static void acpi_device_unregister(struct acpi_device *device, int type)
spin_unlock(&acpi_device_lock);
acpi_detach_data(device->handle, acpi_bus_data_handler);
remove_sysfs_device_files(device);
kobject_unregister(&device->kobj);
acpi_device_remove_files(device);
device_unregister(&device->dev);
}
@ -1353,10 +1252,6 @@ static int __init acpi_scan_init(void)
if (acpi_disabled)
return 0;
result = kset_register(&acpi_namespace_kset);
if (result < 0)
printk(KERN_ERR PREFIX "kset_register error: %d\n", result);
result = bus_register(&acpi_bus_type);
if (result) {
/* We don't want to quit even if we failed to add suspend/resume */

1
include/acpi/acpi_bus.h
View File

@ -299,7 +299,6 @@ struct acpi_device {
struct acpi_device_ops ops;
struct acpi_driver *driver;
void *driver_data;
struct kobject kobj;
struct device dev;
};