#include <acpi/acpi_drivers.h>
#include <acpi/processor.h>
-#define ACPI_PROCESSOR_COMPONENT 0x01000000
+#define PREFIX "ACPI: "
+
#define ACPI_PROCESSOR_CLASS "processor"
#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
#define ACPI_PROCESSOR_FILE_INFO "info"
MODULE_LICENSE("GPL");
static int acpi_processor_add(struct acpi_device *device);
-static int acpi_processor_start(struct acpi_device *device);
static int acpi_processor_remove(struct acpi_device *device, int type);
+#ifdef CONFIG_ACPI_PROCFS
static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
-static void acpi_processor_notify(acpi_handle handle, u32 event, void *data);
+#endif
+static void acpi_processor_notify(struct acpi_device *device, u32 event);
static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
static int acpi_processor_handle_eject(struct acpi_processor *pr);
static const struct acpi_device_id processor_device_ids[] = {
- {ACPI_PROCESSOR_HID, 0},
+ {ACPI_PROCESSOR_OBJECT_HID, 0},
+ {"ACPI0007", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, processor_device_ids);
.ops = {
.add = acpi_processor_add,
.remove = acpi_processor_remove,
- .start = acpi_processor_start,
.suspend = acpi_processor_suspend,
.resume = acpi_processor_resume,
+ .notify = acpi_processor_notify,
},
};
#define INSTALL_NOTIFY_HANDLER 1
#define UNINSTALL_NOTIFY_HANDLER 2
-
+#ifdef CONFIG_ACPI_PROCFS
static const struct file_operations acpi_processor_info_fops = {
.owner = THIS_MODULE,
.open = acpi_processor_info_open_fs,
.llseek = seq_lseek,
.release = single_release,
};
+#endif
DEFINE_PER_CPU(struct acpi_processor *, processors);
struct acpi_processor_errata errata __read_mostly;
FS Interface (/proc)
-------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_PROCFS
static struct proc_dir_entry *acpi_processor_dir = NULL;
static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
if (!acpi_device_dir(device))
return -ENODEV;
}
- acpi_device_dir(device)->owner = THIS_MODULE;
/* 'info' [R] */
entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO,
return -EIO;
return 0;
}
-
static int acpi_processor_remove_fs(struct acpi_device *device)
{
return 0;
}
+#else
+static inline int acpi_processor_add_fs(struct acpi_device *device)
+{
+ return 0;
+}
+static inline int acpi_processor_remove_fs(struct acpi_device *device)
+{
+ return 0;
+}
+#endif
/* Use the acpiid in MADT to map cpus in case of SMP */
#ifndef CONFIG_SMP
-static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;}
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; }
#else
static struct acpi_table_madt *madt;
return 0;
}
+static int map_x2apic_id(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_x2apic *apic =
+ (struct acpi_madt_local_x2apic *)entry;
+ u32 tmp = apic->local_apic_id;
+
+ /* Only check enabled APICs*/
+ if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ /* Device statement declaration type */
+ if (device_declaration) {
+ if (apic->uid == acpi_id)
+ goto found;
+ }
+
+ return 0;
+found:
+ *apic_id = tmp;
+ return 1;
+}
+
static int map_lsapic_id(struct acpi_subtable_header *entry,
- u32 acpi_id, int *apic_id)
+ int device_declaration, u32 acpi_id, int *apic_id)
{
struct acpi_madt_local_sapic *lsapic =
(struct acpi_madt_local_sapic *)entry;
+ u32 tmp = (lsapic->id << 8) | lsapic->eid;
+
/* Only check enabled APICs*/
- if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
- /* First check against id */
- if (lsapic->processor_id == acpi_id) {
- *apic_id = (lsapic->id << 8) | lsapic->eid;
- return 1;
- /* Check against optional uid */
- } else if (entry->length >= 16 &&
- lsapic->uid == acpi_id) {
- *apic_id = lsapic->uid;
- return 1;
- }
- }
+ if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ /* Device statement declaration type */
+ if (device_declaration) {
+ if (entry->length < 16)
+ printk(KERN_ERR PREFIX
+ "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
+ tmp);
+ else if (lsapic->uid == acpi_id)
+ goto found;
+ /* Processor statement declaration type */
+ } else if (lsapic->processor_id == acpi_id)
+ goto found;
+
return 0;
+found:
+ *apic_id = tmp;
+ return 1;
}
-static int map_madt_entry(u32 acpi_id)
+static int map_madt_entry(int type, u32 acpi_id)
{
unsigned long madt_end, entry;
int apic_id = -1;
if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
if (map_lapic_id(header, acpi_id, &apic_id))
break;
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
+ if (map_x2apic_id(header, type, acpi_id, &apic_id))
+ break;
} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- if (map_lsapic_id(header, acpi_id, &apic_id))
+ if (map_lsapic_id(header, type, acpi_id, &apic_id))
break;
}
entry += header->length;
return apic_id;
}
-static int map_mat_entry(acpi_handle handle, u32 acpi_id)
+static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
map_lapic_id(header, acpi_id, &apic_id);
} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- map_lsapic_id(header, acpi_id, &apic_id);
+ map_lsapic_id(header, type, acpi_id, &apic_id);
}
exit:
return apic_id;
}
-static int get_cpu_id(acpi_handle handle, u32 acpi_id)
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
{
int i;
int apic_id = -1;
- apic_id = map_mat_entry(handle, acpi_id);
+ apic_id = map_mat_entry(handle, type, acpi_id);
if (apic_id == -1)
- apic_id = map_madt_entry(acpi_id);
+ apic_id = map_madt_entry(type, acpi_id);
if (apic_id == -1)
return apic_id;
Driver Interface
-------------------------------------------------------------------------- */
-static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
+static int acpi_processor_get_info(struct acpi_device *device)
{
acpi_status status = 0;
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
- int cpu_index;
+ struct acpi_processor *pr;
+ int cpu_index, device_declaration = 0;
static int cpu0_initialized;
-
+ pr = acpi_driver_data(device);
if (!pr)
return -EINVAL;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No bus mastering arbitration control\n"));
- /* Check if it is a Device with HID and UID */
- if (has_uid) {
- unsigned long value;
- status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
- NULL, &value);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Evaluating processor _UID\n");
- return -ENODEV;
- }
- pr->acpi_id = value;
- } else {
- /*
- * Evalute the processor object. Note that it is common on SMP to
- * have the first (boot) processor with a valid PBLK address while
- * all others have a NULL address.
- */
+ if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) {
+ /* Declared with "Processor" statement; match ProcessorID */
status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "Evaluating processor object\n");
}
/*
- * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
- * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c
- */
+ * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
+ * >>> 'acpi_get_processor_id(acpi_id, &id)' in
+ * arch/xxx/acpi.c
+ */
pr->acpi_id = object.processor.proc_id;
+ } else {
+ /*
+ * Declared with "Device" statement; match _UID.
+ * Note that we don't handle string _UIDs yet.
+ */
+ unsigned long long value;
+ status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
+ NULL, &value);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX
+ "Evaluating processor _UID [%#x]\n", status);
+ return -ENODEV;
+ }
+ device_declaration = 1;
+ pr->acpi_id = value;
}
- cpu_index = get_cpu_id(pr->handle, pr->acpi_id);
+ cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id);
/* Handle UP system running SMP kernel, with no LAPIC in MADT */
if (!cpu0_initialized && (cpu_index == -1) &&
return -ENODEV;
}
}
-
+ /*
+ * On some boxes several processors use the same processor bus id.
+ * But they are located in different scope. For example:
+ * \_SB.SCK0.CPU0
+ * \_SB.SCK1.CPU0
+ * Rename the processor device bus id. And the new bus id will be
+ * generated as the following format:
+ * CPU+CPU ID.
+ */
+ sprintf(acpi_device_bid(device), "CPU%X", pr->id);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id,
pr->acpi_id));
static DEFINE_PER_CPU(void *, processor_device_array);
-static int __cpuinit acpi_processor_start(struct acpi_device *device)
-{
- int result = 0;
- acpi_status status = AE_OK;
- struct acpi_processor *pr;
- struct sys_device *sysdev;
-
- pr = acpi_driver_data(device);
-
- result = acpi_processor_get_info(pr, device->flags.unique_id);
- if (result) {
- /* Processor is physically not present */
- return 0;
- }
-
- BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
-
- /*
- * Buggy BIOS check
- * ACPI id of processors can be reported wrongly by the BIOS.
- * Don't trust it blindly
- */
- if (per_cpu(processor_device_array, pr->id) != NULL &&
- per_cpu(processor_device_array, pr->id) != device) {
- printk(KERN_WARNING "BIOS reported wrong ACPI id "
- "for the processor\n");
- return -ENODEV;
- }
- per_cpu(processor_device_array, pr->id) = device;
-
- per_cpu(processors, pr->id) = pr;
-
- result = acpi_processor_add_fs(device);
- if (result)
- goto end;
-
- sysdev = get_cpu_sysdev(pr->id);
- if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev"))
- return -EFAULT;
-
- status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
- acpi_processor_notify, pr);
-
- /* _PDC call should be done before doing anything else (if reqd.). */
- arch_acpi_processor_init_pdc(pr);
- acpi_processor_set_pdc(pr);
-#ifdef CONFIG_CPU_FREQ
- acpi_processor_ppc_has_changed(pr);
-#endif
- acpi_processor_get_throttling_info(pr);
- acpi_processor_get_limit_info(pr);
-
-
- acpi_processor_power_init(pr, device);
-
- pr->cdev = thermal_cooling_device_register("Processor", device,
- &processor_cooling_ops);
- if (IS_ERR(pr->cdev)) {
- result = PTR_ERR(pr->cdev);
- goto end;
- }
-
- dev_info(&device->dev, "registered as cooling_device%d\n",
- pr->cdev->id);
-
- result = sysfs_create_link(&device->dev.kobj,
- &pr->cdev->device.kobj,
- "thermal_cooling");
- if (result)
- printk(KERN_ERR PREFIX "Create sysfs link\n");
- result = sysfs_create_link(&pr->cdev->device.kobj,
- &device->dev.kobj,
- "device");
- if (result)
- printk(KERN_ERR PREFIX "Create sysfs link\n");
-
- if (pr->flags.throttling) {
- printk(KERN_INFO PREFIX "%s [%s] (supports",
- acpi_device_name(device), acpi_device_bid(device));
- printk(" %d throttling states", pr->throttling.state_count);
- printk(")\n");
- }
-
- end:
-
- return result;
-}
-
-static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
+static void acpi_processor_notify(struct acpi_device *device, u32 event)
{
- struct acpi_processor *pr = data;
- struct acpi_device *device = NULL;
+ struct acpi_processor *pr = acpi_driver_data(device);
int saved;
if (!pr)
return;
- if (acpi_bus_get_device(pr->handle, &device))
- return;
-
switch (event) {
case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
saved = pr->performance_platform_limit;
acpi_bus_generate_proc_event(device, event,
pr->performance_platform_limit);
acpi_bus_generate_netlink_event(device->pnp.device_class,
- device->dev.bus_id, event,
+ dev_name(&device->dev), event,
pr->performance_platform_limit);
break;
case ACPI_PROCESSOR_NOTIFY_POWER:
acpi_processor_cst_has_changed(pr);
acpi_bus_generate_proc_event(device, event, 0);
acpi_bus_generate_netlink_event(device->pnp.device_class,
- device->dev.bus_id, event, 0);
+ dev_name(&device->dev), event, 0);
break;
case ACPI_PROCESSOR_NOTIFY_THROTTLING:
acpi_processor_tstate_has_changed(pr);
acpi_bus_generate_proc_event(device, event, 0);
acpi_bus_generate_netlink_event(device->pnp.device_class,
- device->dev.bus_id, event, 0);
+ dev_name(&device->dev), event, 0);
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
.notifier_call = acpi_cpu_soft_notify,
};
-static int acpi_processor_add(struct acpi_device *device)
+static int __cpuinit acpi_processor_add(struct acpi_device *device)
{
struct acpi_processor *pr = NULL;
-
-
- if (!device)
- return -EINVAL;
+ int result = 0;
+ struct sys_device *sysdev;
pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
if (!pr)
return -ENOMEM;
+ if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) {
+ kfree(pr);
+ return -ENOMEM;
+ }
+
pr->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
- acpi_driver_data(device) = pr;
+ device->driver_data = pr;
+
+ result = acpi_processor_get_info(device);
+ if (result) {
+ /* Processor is physically not present */
+ return 0;
+ }
+
+ BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
+
+ /*
+ * Buggy BIOS check
+ * ACPI id of processors can be reported wrongly by the BIOS.
+ * Don't trust it blindly
+ */
+ if (per_cpu(processor_device_array, pr->id) != NULL &&
+ per_cpu(processor_device_array, pr->id) != device) {
+ printk(KERN_WARNING "BIOS reported wrong ACPI id "
+ "for the processor\n");
+ result = -ENODEV;
+ goto err_free_cpumask;
+ }
+ per_cpu(processor_device_array, pr->id) = device;
+
+ per_cpu(processors, pr->id) = pr;
+
+ result = acpi_processor_add_fs(device);
+ if (result)
+ goto err_free_cpumask;
+
+ sysdev = get_cpu_sysdev(pr->id);
+ if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) {
+ result = -EFAULT;
+ goto err_remove_fs;
+ }
+
+ /* _PDC call should be done before doing anything else (if reqd.). */
+ arch_acpi_processor_init_pdc(pr);
+ acpi_processor_set_pdc(pr);
+ arch_acpi_processor_cleanup_pdc(pr);
+
+#ifdef CONFIG_CPU_FREQ
+ acpi_processor_ppc_has_changed(pr);
+#endif
+ acpi_processor_get_throttling_info(pr);
+ acpi_processor_get_limit_info(pr);
+
+
+ acpi_processor_power_init(pr, device);
+
+ pr->cdev = thermal_cooling_device_register("Processor", device,
+ &processor_cooling_ops);
+ if (IS_ERR(pr->cdev)) {
+ result = PTR_ERR(pr->cdev);
+ goto err_power_exit;
+ }
+
+ dev_dbg(&device->dev, "registered as cooling_device%d\n",
+ pr->cdev->id);
+
+ result = sysfs_create_link(&device->dev.kobj,
+ &pr->cdev->device.kobj,
+ "thermal_cooling");
+ if (result) {
+ printk(KERN_ERR PREFIX "Create sysfs link\n");
+ goto err_thermal_unregister;
+ }
+ result = sysfs_create_link(&pr->cdev->device.kobj,
+ &device->dev.kobj,
+ "device");
+ if (result) {
+ printk(KERN_ERR PREFIX "Create sysfs link\n");
+ goto err_remove_sysfs;
+ }
return 0;
+
+err_remove_sysfs:
+ sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+err_thermal_unregister:
+ thermal_cooling_device_unregister(pr->cdev);
+err_power_exit:
+ acpi_processor_power_exit(pr, device);
+err_remove_fs:
+ acpi_processor_remove_fs(device);
+err_free_cpumask:
+ free_cpumask_var(pr->throttling.shared_cpu_map);
+
+ return result;
}
static int acpi_processor_remove(struct acpi_device *device, int type)
{
- acpi_status status = AE_OK;
struct acpi_processor *pr = NULL;
pr = acpi_driver_data(device);
- if (pr->id >= nr_cpu_ids) {
- kfree(pr);
- return 0;
- }
+ if (pr->id >= nr_cpu_ids)
+ goto free;
if (type == ACPI_BUS_REMOVAL_EJECT) {
if (acpi_processor_handle_eject(pr))
acpi_processor_power_exit(pr, device);
- status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
- acpi_processor_notify);
-
sysfs_remove_link(&device->dev.kobj, "sysdev");
acpi_processor_remove_fs(device);
per_cpu(processors, pr->id) = NULL;
per_cpu(processor_device_array, pr->id) = NULL;
+
+free:
+ free_cpumask_var(pr->throttling.shared_cpu_map);
kfree(pr);
return 0;
static int is_processor_present(acpi_handle handle)
{
acpi_status status;
- unsigned long sta = 0;
+ unsigned long long sta = 0;
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
{
acpi_handle phandle;
struct acpi_device *pdev;
- struct acpi_processor *pr;
if (acpi_get_parent(handle, &phandle)) {
return -ENODEV;
}
- acpi_bus_start(*device);
-
- pr = acpi_driver_data(*device);
- if (!pr)
- return -ENODEV;
-
- if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) {
- kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE);
- }
return 0;
}
"Unable to add the device\n");
break;
}
-
- pr = acpi_driver_data(device);
- if (!pr) {
- printk(KERN_ERR PREFIX "Driver data is NULL\n");
- break;
- }
-
- if (pr->id >= 0 && (pr->id < nr_cpu_ids)) {
- kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
- break;
- }
-
- result = acpi_processor_start(device);
- if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) {
- kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
- } else {
- printk(KERN_ERR PREFIX "Device [%s] failed to start\n",
- acpi_device_bid(device));
- }
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Driver data is NULL, dropping EJECT\n");
return;
}
-
- if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id)))
- kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
{
int result = 0;
+ if (acpi_disabled)
+ return 0;
+
memset(&errata, 0, sizeof(errata));
#ifdef CONFIG_SMP
(struct acpi_table_header **)&madt)))
madt = NULL;
#endif
-
+#ifdef CONFIG_ACPI_PROCFS
acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir);
if (!acpi_processor_dir)
return -ENOMEM;
- acpi_processor_dir->owner = THIS_MODULE;
-
+#endif
/*
* Check whether the system is DMI table. If yes, OSPM
* should not use mwait for CPU-states.
cpuidle_unregister_driver(&acpi_idle_driver);
out_proc:
+#ifdef CONFIG_ACPI_PROCFS
remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+#endif
return result;
}
static void __exit acpi_processor_exit(void)
{
+ if (acpi_disabled)
+ return;
+
acpi_processor_ppc_exit();
acpi_thermal_cpufreq_exit();
cpuidle_unregister_driver(&acpi_idle_driver);
+#ifdef CONFIG_ACPI_PROCFS
remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+#endif
return;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff