X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=kernel%2Fpower%2Fpower.h;h=34b43542785a3859d8e954858346aeb8d409f367;hb=972d45fb43f0f0793fa275c4a22998106760cd61;hp=bfe999f7b2720b9b3fa1b0a667103e35282922d1;hpb=c226951b93f7cd7c3a10b17384535b617bd43fd0;p=powerpc.git

diff --git a/kernel/power/power.h b/kernel/power/power.h
index bfe999f7b2..34b4354278 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -14,15 +14,29 @@ struct swsusp_info {
 
 
 #ifdef CONFIG_SOFTWARE_SUSPEND
-extern int pm_suspend_disk(void);
+/*
+ * 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)
 
+extern int pm_suspend_disk(void);
 #else
 static inline int pm_suspend_disk(void)
 {
 	return -EPERM;
 }
 #endif
-extern struct semaphore pm_sem;
+
+extern int pfn_is_nosave(unsigned long);
+
+extern struct mutex pm_mutex;
+
 #define power_attr(_name) \
 static struct subsys_attribute _name##_attr = {	\
 	.attr	= {				\
@@ -33,19 +47,19 @@ static struct subsys_attribute _name##_attr = {	\
 	.store	= _name##_store,		\
 }
 
-extern struct subsystem power_subsys;
-
-/* References to section boundaries */
-extern const void __nosave_begin, __nosave_end;
+extern struct kset power_subsys;
 
 /* 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 int create_basic_memory_bitmaps(void);
+extern void free_basic_memory_bitmaps(void);
 extern unsigned int count_data_pages(void);
 
 /**
@@ -102,8 +116,18 @@ struct snapshot_handle {
 extern unsigned int snapshot_additional_pages(struct zone *zone);
 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);
-extern void snapshot_free_unused_memory(struct snapshot_handle *handle);
+
+/*
+ * This structure is used to pass the values needed for the identification
+ * of the resume swap area from a user space to the kernel via the
+ * SNAPSHOT_SET_SWAP_AREA ioctl
+ */
+struct resume_swap_area {
+	loff_t offset;
+	u_int32_t dev;
+} __attribute__((packed));
 
 #define SNAPSHOT_IOC_MAGIC	'3'
 #define SNAPSHOT_FREEZE			_IO(SNAPSHOT_IOC_MAGIC, 1)
@@ -117,32 +141,21 @@ extern void snapshot_free_unused_memory(struct snapshot_handle *handle);
 #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 SNAPSHOT_PMOPS			_IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int)
+#define SNAPSHOT_SET_SWAP_AREA		_IOW(SNAPSHOT_IOC_MAGIC, 13, \
+							struct resume_swap_area)
+#define SNAPSHOT_IOC_MAXNR	13
 
-#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)
+#define PMOPS_PREPARE	1
+#define PMOPS_ENTER	2
+#define PMOPS_FINISH	3
 
-struct bitmap_page {
-	unsigned long		chunks[BITMAP_PAGE_CHUNKS];
-	struct bitmap_page	*next;
-};
+/* If unset, the snapshot device cannot be open. */
+extern atomic_t snapshot_device_available;
 
-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 sector_t alloc_swapdev_block(int swap);
+extern void free_all_swap_pages(int swap);
+extern int swsusp_swap_in_use(void);
 
 extern int swsusp_check(void);
 extern int swsusp_shrink_memory(void);
@@ -153,3 +166,7 @@ extern int swsusp_read(void);
 extern int swsusp_write(void);
 extern void swsusp_close(void);
 extern int suspend_enter(suspend_state_t state);
+
+struct timeval;
+extern void swsusp_show_speed(struct timeval *, struct timeval *,
+				unsigned int, char *);