X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fpower%2Fpower.h;h=f06f12f2176733c6f87528c3a16f8c0a881e543c;hb=638ebcc81f40b160f5e8b161e690e9b1b9503c1e;hp=7e8492fd142313ba4cac756274a76c8df4a66975;hpb=5367f2d67c7d0bf1faae90e6e7b4e2ac3c9b5e0f;p=linux-2.6

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 7e8492fd14..f06f12f217 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -1,14 +1,6 @@
 #include <linux/suspend.h>
 #include <linux/utsname.h>
 
-/* With SUSPEND_CONSOLE defined suspend looks *really* cool, but
-   we probably do not take enough locks for switching consoles, etc,
-   so bad things might happen.
-*/
-#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
-#define SUSPEND_CONSOLE	(MAX_NR_CONSOLES-1)
-#endif
-
 struct swsusp_info {
 	struct new_utsname	uts;
 	u32			version_code;
@@ -16,6 +8,7 @@ struct swsusp_info {
 	int			cpus;
 	unsigned long		image_pages;
 	unsigned long		pages;
+	unsigned long		size;
 } __attribute__((aligned(PAGE_SIZE)));
 
 
@@ -42,27 +35,82 @@ static struct subsys_attribute _name##_attr = {	\
 
 extern struct subsystem power_subsys;
 
-extern int pm_prepare_console(void);
-extern void pm_restore_console(void);
-
 /* References to section boundaries */
 extern const void __nosave_begin, __nosave_end;
 
-extern unsigned int nr_copy_pages;
 extern struct pbe *pagedir_nosave;
 
-/* Preferred image size in MB (default 500) */
-extern unsigned int image_size;
+/* Preferred image size in bytes (default 500 MB) */
+extern unsigned long image_size;
+extern int in_suspend;
+extern dev_t swsusp_resume_device;
 
 extern asmlinkage int swsusp_arch_suspend(void);
 extern asmlinkage int swsusp_arch_resume(void);
 
 extern unsigned int count_data_pages(void);
-extern void free_pagedir(struct pbe *pblist);
-extern void release_eaten_pages(void);
-extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
+
+struct snapshot_handle {
+	loff_t		offset;
+	unsigned int	page;
+	unsigned int	page_offset;
+	unsigned int	prev;
+	struct pbe	*pbe;
+	void		*buffer;
+	unsigned int	buf_offset;
+};
+
+#define data_of(handle)	((handle).buffer + (handle).buf_offset)
+
+extern int snapshot_read_next(struct snapshot_handle *handle, size_t count);
+extern int snapshot_write_next(struct snapshot_handle *handle, size_t count);
+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
+
+/**
+ *	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.
+ */
+
+#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)
+
+struct bitmap_page {
+	unsigned long		chunks[BITMAP_PAGE_CHUNKS];
+	struct bitmap_page	*next;
+};
+
+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);
+
+extern int swsusp_check(void);
+extern int swsusp_shrink_memory(void);
 extern void swsusp_free(void);
-extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
-extern unsigned int snapshot_nr_pages(void);
-extern struct pbe *snapshot_pblist(void);
-extern void snapshot_pblist_set(struct pbe *pblist);
+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);