static const struct acpi_device_id processor_device_ids[] = {
+ {ACPI_PROCESSOR_OBJECT_HID, 0},
{ACPI_PROCESSOR_HID, 0},
{"", 0},
};
.release = single_release,
};
-struct acpi_processor *processors[NR_CPUS];
+DEFINE_PER_CPU(struct acpi_processor *, processors);
struct acpi_processor_errata errata __read_mostly;
+static int set_no_mwait(const struct dmi_system_id *id)
+{
+ printk(KERN_NOTICE PREFIX "%s detected - "
+ "disabling mwait for CPU C-states\n", id->ident);
+ idle_nomwait = 1;
+ return 0;
+}
+
+static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
+ {
+ set_no_mwait, "IFL91 board", {
+ DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
+ DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"),
+ DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL},
+ {
+ set_no_mwait, "Extensa 5220", {
+ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
+ DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
+ {},
+};
/* --------------------------------------------------------------------------
Errata Handling
if (!pdc_in)
return status;
+ if (idle_nomwait) {
+ /*
+ * If mwait is disabled for CPU C-states, the C2C3_FFH access
+ * mode will be disabled in the parameter of _PDC object.
+ * Of course C1_FFH access mode will also be disabled.
+ */
+ union acpi_object *obj;
+ u32 *buffer = NULL;
+
+ obj = pdc_in->pointer;
+ buffer = (u32 *)(obj->buffer.pointer);
+ buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
+ }
status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL);
if (ACPI_FAILURE(status))
/* 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;
}
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 (map_lapic_id(header, 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;
+ if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_HID)) {
+ /*
+ * 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\n");
+ printk(KERN_ERR PREFIX
+ "Evaluating processor _UID [%#x]\n", status);
return -ENODEV;
}
+ device_declaration = 1;
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.
- */
+ /* 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;
}
- 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 0;
}
-static void *processor_device_array[NR_CPUS];
+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);
+ result = acpi_processor_get_info(device);
if (result) {
/* Processor is physically not present */
return 0;
* ACPI id of processors can be reported wrongly by the BIOS.
* Don't trust it blindly
*/
- if (processor_device_array[pr->id] != NULL &&
- processor_device_array[pr->id] != device) {
+ 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;
}
- processor_device_array[pr->id] = device;
+ per_cpu(processor_device_array, pr->id) = device;
- processors[pr->id] = pr;
+ 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);
goto end;
}
- printk(KERN_INFO PREFIX
- "%s is registered as cooling_device%d\n",
- device->dev.bus_id, pr->cdev->id);
+ dev_info(&device->dev, "registered as cooling_device%d\n",
+ pr->cdev->id);
result = sysfs_create_link(&device->dev.kobj,
&pr->cdev->device.kobj,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
- struct acpi_processor *pr = processors[cpu];
+ struct acpi_processor *pr = per_cpu(processors, cpu);
if (action == CPU_ONLINE && pr) {
acpi_processor_ppc_has_changed(pr);
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;
return 0;
}
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);
if (pr->cdev) {
pr->cdev = NULL;
}
- processors[pr->id] = NULL;
- processor_device_array[pr->id] = NULL;
+ per_cpu(processors, pr->id) = NULL;
+ per_cpu(processor_device_array, pr->id) = NULL;
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);
static int acpi_processor_handle_eject(struct acpi_processor *pr)
{
- if (cpu_online(pr->id)) {
- return (-EINVAL);
- }
+ if (cpu_online(pr->id))
+ cpu_down(pr->id);
+
arch_unregister_cpu(pr->id);
acpi_unmap_lsapic(pr->id);
return (0);
{
int result = 0;
-
- memset(&processors, 0, sizeof(processors));
memset(&errata, 0, sizeof(errata));
#ifdef CONFIG_SMP
return -ENOMEM;
acpi_processor_dir->owner = THIS_MODULE;
+ /*
+ * Check whether the system is DMI table. If yes, OSPM
+ * should not use mwait for CPU-states.
+ */
+ dmi_check_system(processor_idle_dmi_table);
result = cpuidle_register_driver(&acpi_idle_driver);
if (result < 0)
goto out_proc;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff