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path: root/drivers/acpi/acpi_memhotplug.c
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Diffstat (limited to 'drivers/acpi/acpi_memhotplug.c')
-rw-r--r--drivers/acpi/acpi_memhotplug.c177
1 files changed, 80 insertions, 97 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 77285ffe41c5..2143609d2936 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -32,7 +32,6 @@
#include <linux/memory_hotplug.h>
#include <acpi/acpi_drivers.h>
-
#define ACPI_MEMORY_DEVICE_COMPONENT 0x08000000UL
#define ACPI_MEMORY_DEVICE_CLASS "memory"
#define ACPI_MEMORY_DEVICE_HID "PNP0C80"
@@ -41,8 +40,8 @@
#define _COMPONENT ACPI_MEMORY_DEVICE_COMPONENT
-ACPI_MODULE_NAME ("acpi_memory")
-MODULE_AUTHOR("Naveen B S <naveen.b.s@intel.com>");
+ACPI_MODULE_NAME("acpi_memory")
+ MODULE_AUTHOR("Naveen B S <naveen.b.s@intel.com>");
MODULE_DESCRIPTION(ACPI_MEMORY_DEVICE_DRIVER_NAME);
MODULE_LICENSE("GPL");
@@ -56,34 +55,33 @@ MODULE_LICENSE("GPL");
#define MEMORY_POWER_ON_STATE 1
#define MEMORY_POWER_OFF_STATE 2
-static int acpi_memory_device_add (struct acpi_device *device);
-static int acpi_memory_device_remove (struct acpi_device *device, int type);
+static int acpi_memory_device_add(struct acpi_device *device);
+static int acpi_memory_device_remove(struct acpi_device *device, int type);
static struct acpi_driver acpi_memory_device_driver = {
- .name = ACPI_MEMORY_DEVICE_DRIVER_NAME,
- .class = ACPI_MEMORY_DEVICE_CLASS,
- .ids = ACPI_MEMORY_DEVICE_HID,
- .ops = {
- .add = acpi_memory_device_add,
- .remove = acpi_memory_device_remove,
- },
+ .name = ACPI_MEMORY_DEVICE_DRIVER_NAME,
+ .class = ACPI_MEMORY_DEVICE_CLASS,
+ .ids = ACPI_MEMORY_DEVICE_HID,
+ .ops = {
+ .add = acpi_memory_device_add,
+ .remove = acpi_memory_device_remove,
+ },
};
struct acpi_memory_device {
acpi_handle handle;
- unsigned int state; /* State of the memory device */
+ unsigned int state; /* State of the memory device */
unsigned short cache_attribute; /* memory cache attribute */
- unsigned short read_write_attribute;/* memory read/write attribute */
- u64 start_addr; /* Memory Range start physical addr */
- u64 end_addr; /* Memory Range end physical addr */
+ unsigned short read_write_attribute; /* memory read/write attribute */
+ u64 start_addr; /* Memory Range start physical addr */
+ u64 end_addr; /* Memory Range end physical addr */
};
-
static int
acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
{
acpi_status status;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_resource *resource = NULL;
struct acpi_resource_address64 address64;
@@ -94,15 +92,15 @@ acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
if (ACPI_FAILURE(status))
return_VALUE(-EINVAL);
- resource = (struct acpi_resource *) buffer.pointer;
+ resource = (struct acpi_resource *)buffer.pointer;
status = acpi_resource_to_address64(resource, &address64);
if (ACPI_SUCCESS(status)) {
if (address64.resource_type == ACPI_MEMORY_RANGE) {
/* Populate the structure */
mem_device->cache_attribute =
- address64.attribute.memory.cache_attribute;
+ address64.attribute.memory.cache_attribute;
mem_device->read_write_attribute =
- address64.attribute.memory.read_write_attribute;
+ address64.attribute.memory.read_write_attribute;
mem_device->start_addr = address64.min_address_range;
mem_device->end_addr = address64.max_address_range;
}
@@ -114,7 +112,7 @@ acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
static int
acpi_memory_get_device(acpi_handle handle,
- struct acpi_memory_device **mem_device)
+ struct acpi_memory_device **mem_device)
{
acpi_status status;
acpi_handle phandle;
@@ -128,8 +126,7 @@ acpi_memory_get_device(acpi_handle handle,
status = acpi_get_parent(handle, &phandle);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in acpi_get_parent\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error in acpi_get_parent\n"));
return_VALUE(-EINVAL);
}
@@ -137,7 +134,7 @@ acpi_memory_get_device(acpi_handle handle,
status = acpi_bus_get_device(phandle, &pdevice);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in acpi_bus_get_device\n"));
+ "Error in acpi_bus_get_device\n"));
return_VALUE(-EINVAL);
}
@@ -147,23 +144,21 @@ acpi_memory_get_device(acpi_handle handle,
*/
status = acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in acpi_bus_add\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error in acpi_bus_add\n"));
return_VALUE(-EINVAL);
}
-end:
+ end:
*mem_device = acpi_driver_data(device);
if (!(*mem_device)) {
- printk(KERN_ERR "\n driver data not found" );
+ printk(KERN_ERR "\n driver data not found");
return_VALUE(-ENODEV);
}
return_VALUE(0);
}
-static int
-acpi_memory_check_device(struct acpi_memory_device *mem_device)
+static int acpi_memory_check_device(struct acpi_memory_device *mem_device)
{
unsigned long current_status;
@@ -171,22 +166,21 @@ acpi_memory_check_device(struct acpi_memory_device *mem_device)
/* Get device present/absent information from the _STA */
if (ACPI_FAILURE(acpi_evaluate_integer(mem_device->handle, "_STA",
- NULL, &current_status)))
+ NULL, &current_status)))
return_VALUE(-ENODEV);
/*
* Check for device status. Device should be
* present/enabled/functioning.
*/
if (!((current_status & ACPI_MEMORY_STA_PRESENT)
- && (current_status & ACPI_MEMORY_STA_ENABLED)
- && (current_status & ACPI_MEMORY_STA_FUNCTIONAL)))
+ && (current_status & ACPI_MEMORY_STA_ENABLED)
+ && (current_status & ACPI_MEMORY_STA_FUNCTIONAL)))
return_VALUE(-ENODEV);
return_VALUE(0);
}
-static int
-acpi_memory_enable_device(struct acpi_memory_device *mem_device)
+static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
{
int result;
@@ -196,7 +190,7 @@ acpi_memory_enable_device(struct acpi_memory_device *mem_device)
result = acpi_memory_get_device_resources(mem_device);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "\nget_device_resources failed\n"));
+ "\nget_device_resources failed\n"));
mem_device->state = MEMORY_INVALID_STATE;
return result;
}
@@ -206,11 +200,9 @@ acpi_memory_enable_device(struct acpi_memory_device *mem_device)
* Note: Assume that this function returns zero on success
*/
result = add_memory(mem_device->start_addr,
- (mem_device->end_addr - mem_device->start_addr) + 1,
- mem_device->read_write_attribute);
+ (mem_device->end_addr - mem_device->start_addr) + 1);
if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "\nadd_memory failed\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "\nadd_memory failed\n"));
mem_device->state = MEMORY_INVALID_STATE;
return result;
}
@@ -218,11 +210,10 @@ acpi_memory_enable_device(struct acpi_memory_device *mem_device)
return result;
}
-static int
-acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)
+static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)
{
acpi_status status;
- struct acpi_object_list arg_list;
+ struct acpi_object_list arg_list;
union acpi_object arg;
unsigned long current_status;
@@ -234,16 +225,16 @@ acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = 1;
status = acpi_evaluate_object(mem_device->handle,
- "_EJ0", &arg_list, NULL);
+ "_EJ0", &arg_list, NULL);
/* Return on _EJ0 failure */
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"_EJ0 failed.\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "_EJ0 failed.\n"));
return_VALUE(-ENODEV);
}
/* Evalute _STA to check if the device is disabled */
status = acpi_evaluate_integer(mem_device->handle, "_STA",
- NULL, &current_status);
+ NULL, &current_status);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
@@ -254,8 +245,7 @@ acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)
return_VALUE(0);
}
-static int
-acpi_memory_disable_device(struct acpi_memory_device *mem_device)
+static int acpi_memory_disable_device(struct acpi_memory_device *mem_device)
{
int result;
u64 start = mem_device->start_addr;
@@ -268,7 +258,7 @@ acpi_memory_disable_device(struct acpi_memory_device *mem_device)
* Ask the VM to offline this memory range.
* Note: Assume that this function returns zero on success
*/
- result = remove_memory(start, len, attr);
+ result = remove_memory(start, len);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Hot-Remove failed.\n"));
return_VALUE(result);
@@ -278,7 +268,7 @@ acpi_memory_disable_device(struct acpi_memory_device *mem_device)
result = acpi_memory_powerdown_device(mem_device);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Device Power Down failed.\n"));
+ "Device Power Down failed.\n"));
/* Set the status of the device to invalid */
mem_device->state = MEMORY_INVALID_STATE;
return result;
@@ -288,8 +278,7 @@ acpi_memory_disable_device(struct acpi_memory_device *mem_device)
return result;
}
-static void
-acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
+static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_memory_device *mem_device;
struct acpi_device *device;
@@ -299,37 +288,37 @@ acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived BUS CHECK notification for device\n"));
+ "\nReceived BUS CHECK notification for device\n"));
/* Fall Through */
case ACPI_NOTIFY_DEVICE_CHECK:
if (event == ACPI_NOTIFY_DEVICE_CHECK)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived DEVICE CHECK notification for device\n"));
+ "\nReceived DEVICE CHECK notification for device\n"));
if (acpi_memory_get_device(handle, &mem_device)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in finding driver data\n"));
+ "Error in finding driver data\n"));
return_VOID;
}
if (!acpi_memory_check_device(mem_device)) {
if (acpi_memory_enable_device(mem_device))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in acpi_memory_enable_device\n"));
+ "Error in acpi_memory_enable_device\n"));
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived EJECT REQUEST notification for device\n"));
+ "\nReceived EJECT REQUEST notification for device\n"));
if (acpi_bus_get_device(handle, &device)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Device doesn't exist\n"));
+ "Device doesn't exist\n"));
break;
}
mem_device = acpi_driver_data(device);
if (!mem_device) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Driver Data is NULL\n"));
+ "Driver Data is NULL\n"));
break;
}
@@ -337,26 +326,25 @@ acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
* Currently disabling memory device from kernel mode
* TBD: Can also be disabled from user mode scripts
* TBD: Can also be disabled by Callback registration
- * with generic sysfs driver
+ * with generic sysfs driver
*/
if (acpi_memory_disable_device(mem_device))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error in acpi_memory_disable_device\n"));
+ "Error in acpi_memory_disable_device\n"));
/*
* TBD: Invoke acpi_bus_remove to cleanup data structures
*/
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
+ "Unsupported event [0x%x]\n", event));
break;
}
return_VOID;
}
-static int
-acpi_memory_device_add(struct acpi_device *device)
+static int acpi_memory_device_add(struct acpi_device *device)
{
int result;
struct acpi_memory_device *mem_device = NULL;
@@ -391,8 +379,7 @@ acpi_memory_device_add(struct acpi_device *device)
return_VALUE(result);
}
-static int
-acpi_memory_device_remove (struct acpi_device *device, int type)
+static int acpi_memory_device_remove(struct acpi_device *device, int type)
{
struct acpi_memory_device *mem_device = NULL;
@@ -401,7 +388,7 @@ acpi_memory_device_remove (struct acpi_device *device, int type)
if (!device || !acpi_driver_data(device))
return_VALUE(-EINVAL);
- mem_device = (struct acpi_memory_device *) acpi_driver_data(device);
+ mem_device = (struct acpi_memory_device *)acpi_driver_data(device);
kfree(mem_device);
return_VALUE(0);
@@ -410,12 +397,11 @@ acpi_memory_device_remove (struct acpi_device *device, int type)
/*
* Helper function to check for memory device
*/
-static acpi_status
-is_memory_device(acpi_handle handle)
+static acpi_status is_memory_device(acpi_handle handle)
{
char *hardware_id;
acpi_status status;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_device_info *info;
ACPI_FUNCTION_TRACE("is_memory_device");
@@ -432,7 +418,7 @@ is_memory_device(acpi_handle handle)
hardware_id = info->hardware_id.value;
if ((hardware_id == NULL) ||
- (strcmp(hardware_id, ACPI_MEMORY_DEVICE_HID)))
+ (strcmp(hardware_id, ACPI_MEMORY_DEVICE_HID)))
status = AE_ERROR;
acpi_os_free(buffer.pointer);
@@ -440,8 +426,8 @@ is_memory_device(acpi_handle handle)
}
static acpi_status
-acpi_memory_register_notify_handler (acpi_handle handle,
- u32 level, void *ctxt, void **retv)
+acpi_memory_register_notify_handler(acpi_handle handle,
+ u32 level, void *ctxt, void **retv)
{
acpi_status status;
@@ -452,10 +438,10 @@ acpi_memory_register_notify_handler (acpi_handle handle,
return_ACPI_STATUS(AE_OK); /* continue */
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
- acpi_memory_device_notify, NULL);
+ acpi_memory_device_notify, NULL);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error installing notify handler\n"));
+ "Error installing notify handler\n"));
return_ACPI_STATUS(AE_OK); /* continue */
}
@@ -463,8 +449,8 @@ acpi_memory_register_notify_handler (acpi_handle handle,
}
static acpi_status
-acpi_memory_deregister_notify_handler (acpi_handle handle,
- u32 level, void *ctxt, void **retv)
+acpi_memory_deregister_notify_handler(acpi_handle handle,
+ u32 level, void *ctxt, void **retv)
{
acpi_status status;
@@ -475,18 +461,18 @@ acpi_memory_deregister_notify_handler (acpi_handle handle,
return_ACPI_STATUS(AE_OK); /* continue */
status = acpi_remove_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY, acpi_memory_device_notify);
+ ACPI_SYSTEM_NOTIFY,
+ acpi_memory_device_notify);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error removing notify handler\n"));
+ "Error removing notify handler\n"));
return_ACPI_STATUS(AE_OK); /* continue */
}
return_ACPI_STATUS(status);
}
-static int __init
-acpi_memory_device_init (void)
+static int __init acpi_memory_device_init(void)
{
int result;
acpi_status status;
@@ -499,21 +485,20 @@ acpi_memory_device_init (void)
return_VALUE(-ENODEV);
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- acpi_memory_register_notify_handler,
- NULL, NULL);
+ ACPI_UINT32_MAX,
+ acpi_memory_register_notify_handler,
+ NULL, NULL);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed\n"));
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "walk_namespace failed\n"));
acpi_bus_unregister_driver(&acpi_memory_device_driver);
return_VALUE(-ENODEV);
- }
+ }
return_VALUE(0);
}
-static void __exit
-acpi_memory_device_exit (void)
+static void __exit acpi_memory_device_exit(void)
{
acpi_status status;
@@ -524,12 +509,12 @@ acpi_memory_device_exit (void)
* handles.
*/
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- acpi_memory_deregister_notify_handler,
- NULL, NULL);
+ ACPI_UINT32_MAX,
+ acpi_memory_deregister_notify_handler,
+ NULL, NULL);
- if (ACPI_FAILURE (status))
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed\n"));
+ if (ACPI_FAILURE(status))
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "walk_namespace failed\n"));
acpi_bus_unregister_driver(&acpi_memory_device_driver);
@@ -538,5 +523,3 @@ acpi_memory_device_exit (void)
module_init(acpi_memory_device_init);
module_exit(acpi_memory_device_exit);
-
-
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