#include <linux/suspend.h>
+#include <linux/suspend_ioctls.h>
#include <linux/utsname.h>
+#include <linux/freezer.h>
struct swsusp_info {
struct new_utsname uts;
unsigned long size;
} __attribute__((aligned(PAGE_SIZE)));
+#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_ARCH_HIBERNATION_HEADER
+/* Maximum size of architecture specific data in a hibernation header */
+#define MAX_ARCH_HEADER_SIZE (sizeof(struct new_utsname) + 4)
+extern int arch_hibernation_header_save(void *addr, unsigned int max_size);
+extern int arch_hibernation_header_restore(void *addr);
-#ifdef CONFIG_SOFTWARE_SUSPEND
-extern int pm_suspend_disk(void);
+static inline int init_header_complete(struct swsusp_info *info)
+{
+ return arch_hibernation_header_save(info, MAX_ARCH_HEADER_SIZE);
+}
-#else
-static inline int pm_suspend_disk(void)
+static inline char *check_image_kernel(struct swsusp_info *info)
{
- return -EPERM;
+ return arch_hibernation_header_restore(info) ?
+ "architecture specific data" : NULL;
}
+#endif /* CONFIG_ARCH_HIBERNATION_HEADER */
+
+/*
+ * Keep some memory free so that I/O operations can succeed without paging
+ * [Might this be more than 4 MB?]
+ */
+#define PAGES_FOR_IO ((4096 * 1024) >> PAGE_SHIFT)
+
+/*
+ * Keep 1 MB of memory free so that device drivers can allocate some pages in
+ * their .suspend() routines without breaking the suspend to disk.
+ */
+#define SPARE_PAGES ((1024 * 1024) >> PAGE_SHIFT)
+
+/* kernel/power/hibernate.c */
+extern int hibernation_snapshot(int platform_mode);
+extern int hibernation_restore(int platform_mode);
+extern int hibernation_platform_enter(void);
#endif
-extern struct semaphore pm_sem;
+
+extern int pfn_is_nosave(unsigned long);
+
#define power_attr(_name) \
-static struct subsys_attribute _name##_attr = { \
+static struct kobj_attribute _name##_attr = { \
.attr = { \
.name = __stringify(_name), \
.mode = 0644, \
.store = _name##_store, \
}
-extern struct subsystem power_subsys;
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
-
/* Preferred image size in bytes (default 500 MB) */
extern unsigned long image_size;
extern int in_suspend;
extern dev_t swsusp_resume_device;
+extern sector_t swsusp_resume_block;
extern asmlinkage int swsusp_arch_suspend(void);
extern asmlinkage int swsusp_arch_resume(void);
-extern unsigned int count_data_pages(void);
+extern int create_basic_memory_bitmaps(void);
+extern void free_basic_memory_bitmaps(void);
+extern int hibernate_preallocate_memory(void);
/**
* Auxiliary structure used for reading the snapshot image data and
unsigned int prev; /* number of the block of PAGE_SIZE bytes that
* was the current one previously
*/
- struct pbe *pbe; /* PBE that corresponds to 'buffer' */
- struct pbe *last_pbe; /* When the image is restored (eg. read
- * from disk) we can store some image
- * data directly in the page frames
- * in which they were before suspend.
- * In such a case the PBEs that
- * correspond to them will be unused.
- * This is the last PBE, so far, that
- * does not correspond to such data.
- */
void *buffer; /* address of the block to read from
* or write to
*/
#define data_of(handle) ((handle).buffer + (handle).buf_offset)
extern unsigned int snapshot_additional_pages(struct zone *zone);
+extern unsigned long snapshot_get_image_size(void);
extern int snapshot_read_next(struct snapshot_handle *handle, size_t count);
extern int snapshot_write_next(struct snapshot_handle *handle, size_t count);
+extern void snapshot_write_finalize(struct snapshot_handle *handle);
extern int snapshot_image_loaded(struct snapshot_handle *handle);
-#define SNAPSHOT_IOC_MAGIC '3'
-#define SNAPSHOT_FREEZE _IO(SNAPSHOT_IOC_MAGIC, 1)
-#define SNAPSHOT_UNFREEZE _IO(SNAPSHOT_IOC_MAGIC, 2)
-#define SNAPSHOT_ATOMIC_SNAPSHOT _IOW(SNAPSHOT_IOC_MAGIC, 3, void *)
-#define SNAPSHOT_ATOMIC_RESTORE _IO(SNAPSHOT_IOC_MAGIC, 4)
-#define SNAPSHOT_FREE _IO(SNAPSHOT_IOC_MAGIC, 5)
-#define SNAPSHOT_SET_IMAGE_SIZE _IOW(SNAPSHOT_IOC_MAGIC, 6, unsigned long)
-#define SNAPSHOT_AVAIL_SWAP _IOR(SNAPSHOT_IOC_MAGIC, 7, void *)
-#define SNAPSHOT_GET_SWAP_PAGE _IOR(SNAPSHOT_IOC_MAGIC, 8, void *)
-#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
-#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int)
-#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_IOC_MAXNR 11
+/* If unset, the snapshot device cannot be open. */
+extern atomic_t snapshot_device_available;
-/**
- * The bitmap is used for tracing allocated swap pages
- *
- * The entire bitmap consists of a number of bitmap_page
- * structures linked with the help of the .next member.
- * Thus each page can be allocated individually, so we only
- * need to make 0-order memory allocations to create
- * the bitmap.
+extern sector_t alloc_swapdev_block(int swap);
+extern void free_all_swap_pages(int swap);
+extern int swsusp_swap_in_use(void);
+
+/*
+ * Flags that can be passed from the hibernatig hernel to the "boot" kernel in
+ * the image header.
*/
+#define SF_PLATFORM_MODE 1
+
+/* kernel/power/hibernate.c */
+extern int swsusp_check(void);
+extern void swsusp_free(void);
+extern int swsusp_read(unsigned int *flags_p);
+extern int swsusp_write(unsigned int flags);
+extern void swsusp_close(fmode_t);
+
+struct timeval;
+/* kernel/power/swsusp.c */
+extern void swsusp_show_speed(struct timeval *, struct timeval *,
+ unsigned int, char *);
+
+#ifdef CONFIG_SUSPEND
+/* kernel/power/suspend.c */
+extern const char *const pm_states[];
+
+extern bool valid_state(suspend_state_t state);
+extern int suspend_devices_and_enter(suspend_state_t state);
+extern int enter_state(suspend_state_t state);
+#else /* !CONFIG_SUSPEND */
+static inline int suspend_devices_and_enter(suspend_state_t state)
+{
+ return -ENOSYS;
+}
+static inline int enter_state(suspend_state_t state) { return -ENOSYS; }
+static inline bool valid_state(suspend_state_t state) { return false; }
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_PM_TEST_SUSPEND
+/* kernel/power/suspend_test.c */
+extern void suspend_test_start(void);
+extern void suspend_test_finish(const char *label);
+#else /* !CONFIG_PM_TEST_SUSPEND */
+static inline void suspend_test_start(void) {}
+static inline void suspend_test_finish(const char *label) {}
+#endif /* !CONFIG_PM_TEST_SUSPEND */
+
+#ifdef CONFIG_PM_SLEEP
+/* kernel/power/main.c */
+extern int pm_notifier_call_chain(unsigned long val);
+#endif
-#define BITMAP_PAGE_SIZE (PAGE_SIZE - sizeof(void *))
-#define BITMAP_PAGE_CHUNKS (BITMAP_PAGE_SIZE / sizeof(long))
-#define BITS_PER_CHUNK (sizeof(long) * 8)
-#define BITMAP_PAGE_BITS (BITMAP_PAGE_CHUNKS * BITS_PER_CHUNK)
+#ifdef CONFIG_HIGHMEM
+int restore_highmem(void);
+#else
+static inline unsigned int count_highmem_pages(void) { return 0; }
+static inline int restore_highmem(void) { return 0; }
+#endif
-struct bitmap_page {
- unsigned long chunks[BITMAP_PAGE_CHUNKS];
- struct bitmap_page *next;
+/*
+ * Suspend test levels
+ */
+enum {
+ /* keep first */
+ TEST_NONE,
+ TEST_CORE,
+ TEST_CPUS,
+ TEST_PLATFORM,
+ TEST_DEVICES,
+ TEST_FREEZER,
+ /* keep last */
+ __TEST_AFTER_LAST
};
-extern void free_bitmap(struct bitmap_page *bitmap);
-extern struct bitmap_page *alloc_bitmap(unsigned int nr_bits);
-extern unsigned long alloc_swap_page(int swap, struct bitmap_page *bitmap);
-extern void free_all_swap_pages(int swap, struct bitmap_page *bitmap);
+#define TEST_FIRST TEST_NONE
+#define TEST_MAX (__TEST_AFTER_LAST - 1)
-extern int swsusp_check(void);
-extern int swsusp_shrink_memory(void);
-extern void swsusp_free(void);
-extern int swsusp_suspend(void);
-extern int swsusp_resume(void);
-extern int swsusp_read(void);
-extern int swsusp_write(void);
-extern void swsusp_close(void);
-extern int suspend_enter(suspend_state_t state);
+extern int pm_test_level;
+
+#ifdef CONFIG_SUSPEND_FREEZER
+static inline int suspend_freeze_processes(void)
+{
+ return freeze_processes();
+}
+
+static inline void suspend_thaw_processes(void)
+{
+ thaw_processes();
+}
+#else
+static inline int suspend_freeze_processes(void)
+{
+ return 0;
+}
+
+static inline void suspend_thaw_processes(void)
+{
+}
+#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff