Add TuxOnIce support

1 files changed, 260 insertions, 0 deletions

diff --git a/kernel/power/tuxonice.h b/kernel/power/tuxonice.h
new file mode 100644
index 000000000..10b65633f
--- /dev/null
+++ b/kernel/power/tuxonice.h
@@ -0,0 +1,260 @@
+/*
+ * kernel/power/tuxonice.h
+ *
+ * Copyright (C) 2004-2015 Nigel Cunningham (nigel at nigelcunningham com au)
+ *
+ * This file is released under the GPLv2.
+ *
+ * It contains declarations used throughout swsusp.
+ *
+ */
+
+#ifndef KERNEL_POWER_TOI_H
+#define KERNEL_POWER_TOI_H
+
+#include <linux/delay.h>
+#include <linux/bootmem.h>
+#include <linux/suspend.h>
+#include <linux/fs.h>
+#include <asm/setup.h>
+#include "tuxonice_pageflags.h"
+#include "power.h"
+
+#define TOI_CORE_VERSION "3.3"
+#define        TOI_HEADER_VERSION 3
+#define MY_BOOT_KERNEL_DATA_VERSION 4
+
+struct toi_boot_kernel_data {
+        int version;
+        int size;
+        unsigned long toi_action;
+        unsigned long toi_debug_state;
+        u32 toi_default_console_level;
+        int toi_io_time[2][2];
+        char toi_nosave_commandline[COMMAND_LINE_SIZE];
+        unsigned long pages_used[33];
+        unsigned long incremental_bytes_in;
+        unsigned long incremental_bytes_out;
+        unsigned long compress_bytes_in;
+        unsigned long compress_bytes_out;
+        unsigned long pruned_pages;
+};
+
+extern struct toi_boot_kernel_data toi_bkd;
+
+/* Location of book kernel data struct in kernel being resumed */
+extern unsigned long boot_kernel_data_buffer;
+
+/*                 == Action states ==                 */
+
+enum {
+        TOI_REBOOT,
+        TOI_PAUSE,
+        TOI_LOGALL,
+        TOI_CAN_CANCEL,
+        TOI_KEEP_IMAGE,
+        TOI_FREEZER_TEST,
+        TOI_SINGLESTEP,
+        TOI_PAUSE_NEAR_PAGESET_END,
+        TOI_TEST_FILTER_SPEED,
+        TOI_TEST_BIO,
+        TOI_NO_PAGESET2,
+        TOI_IGNORE_ROOTFS,
+        TOI_REPLACE_SWSUSP,
+        TOI_PAGESET2_FULL,
+        TOI_ABORT_ON_RESAVE_NEEDED,
+        TOI_NO_MULTITHREADED_IO,
+        TOI_NO_DIRECT_LOAD, /* Obsolete */
+        TOI_LATE_CPU_HOTPLUG, /* Obsolete */
+        TOI_GET_MAX_MEM_ALLOCD,
+        TOI_NO_FLUSHER_THREAD,
+        TOI_NO_PS2_IF_UNNEEDED,
+        TOI_POST_RESUME_BREAKPOINT,
+        TOI_NO_READAHEAD,
+        TOI_TRACE_DEBUG_ON,
+        TOI_INCREMENTAL_IMAGE,
+};
+
+extern unsigned long toi_bootflags_mask;
+
+#define clear_action_state(bit) (test_and_clear_bit(bit, &toi_bkd.toi_action))
+
+/*                 == Result states ==                 */
+
+enum {
+        TOI_ABORTED,
+        TOI_ABORT_REQUESTED,
+        TOI_NOSTORAGE_AVAILABLE,
+        TOI_INSUFFICIENT_STORAGE,
+        TOI_FREEZING_FAILED,
+        TOI_KEPT_IMAGE,
+        TOI_WOULD_EAT_MEMORY,
+        TOI_UNABLE_TO_FREE_ENOUGH_MEMORY,
+        TOI_PM_SEM,
+        TOI_DEVICE_REFUSED,
+        TOI_SYSDEV_REFUSED,
+        TOI_EXTRA_PAGES_ALLOW_TOO_SMALL,
+        TOI_UNABLE_TO_PREPARE_IMAGE,
+        TOI_FAILED_MODULE_INIT,
+        TOI_FAILED_MODULE_CLEANUP,
+        TOI_FAILED_IO,
+        TOI_OUT_OF_MEMORY,
+        TOI_IMAGE_ERROR,
+        TOI_PLATFORM_PREP_FAILED,
+        TOI_CPU_HOTPLUG_FAILED,
+        TOI_ARCH_PREPARE_FAILED, /* Removed Linux-3.0 */
+        TOI_RESAVE_NEEDED,
+        TOI_CANT_SUSPEND,
+        TOI_NOTIFIERS_PREPARE_FAILED,
+        TOI_PRE_SNAPSHOT_FAILED,
+        TOI_PRE_RESTORE_FAILED,
+        TOI_USERMODE_HELPERS_ERR,
+        TOI_CANT_USE_ALT_RESUME,
+        TOI_HEADER_TOO_BIG,
+        TOI_WAKEUP_EVENT,
+        TOI_SYSCORE_REFUSED,
+        TOI_DPM_PREPARE_FAILED,
+        TOI_DPM_SUSPEND_FAILED,
+        TOI_NUM_RESULT_STATES        /* Used in printing debug info only */
+};
+
+extern unsigned long toi_result;
+
+#define set_result_state(bit) (test_and_set_bit(bit, &toi_result))
+#define set_abort_result(bit) (test_and_set_bit(TOI_ABORTED, &toi_result), \
+                                test_and_set_bit(bit, &toi_result))
+#define clear_result_state(bit) (test_and_clear_bit(bit, &toi_result))
+#define test_result_state(bit) (test_bit(bit, &toi_result))
+
+/*         == Debug sections and levels ==         */
+
+/* debugging levels. */
+enum {
+        TOI_STATUS = 0,
+        TOI_ERROR = 2,
+        TOI_LOW,
+        TOI_MEDIUM,
+        TOI_HIGH,
+        TOI_VERBOSE,
+};
+
+enum {
+        TOI_ANY_SECTION,
+        TOI_EAT_MEMORY,
+        TOI_IO,
+        TOI_HEADER,
+        TOI_WRITER,
+        TOI_MEMORY,
+        TOI_PAGEDIR,
+        TOI_COMPRESS,
+        TOI_BIO,
+};
+
+#define set_debug_state(bit) (test_and_set_bit(bit, &toi_bkd.toi_debug_state))
+#define clear_debug_state(bit) \
+        (test_and_clear_bit(bit, &toi_bkd.toi_debug_state))
+#define test_debug_state(bit) (test_bit(bit, &toi_bkd.toi_debug_state))
+
+/*                == Steps in hibernating ==        */
+
+enum {
+        STEP_HIBERNATE_PREPARE_IMAGE,
+        STEP_HIBERNATE_SAVE_IMAGE,
+        STEP_HIBERNATE_POWERDOWN,
+        STEP_RESUME_CAN_RESUME,
+        STEP_RESUME_LOAD_PS1,
+        STEP_RESUME_DO_RESTORE,
+        STEP_RESUME_READ_PS2,
+        STEP_RESUME_GO,
+        STEP_RESUME_ALT_IMAGE,
+        STEP_CLEANUP,
+        STEP_QUIET_CLEANUP
+};
+
+/*                == TuxOnIce states ==
+        (see also include/linux/suspend.h)        */
+
+#define get_toi_state()  (toi_state)
+#define restore_toi_state(saved_state) \
+        do { toi_state = saved_state; } while (0)
+
+/*                == Module support ==                */
+
+struct toi_core_fns {
+        int (*post_context_save)(void);
+        unsigned long (*get_nonconflicting_page)(void);
+        int (*try_hibernate)(void);
+        void (*try_resume)(void);
+};
+
+extern struct toi_core_fns *toi_core_fns;
+
+/*                == All else ==                        */
+#define KB(x) ((x) << (PAGE_SHIFT - 10))
+#define MB(x) ((x) >> (20 - PAGE_SHIFT))
+
+extern int toi_start_anything(int toi_or_resume);
+extern void toi_finish_anything(int toi_or_resume);
+
+extern int save_image_part1(void);
+extern int toi_atomic_restore(void);
+
+extern int toi_try_hibernate(void);
+extern void toi_try_resume(void);
+
+extern int __toi_post_context_save(void);
+
+extern unsigned int nr_hibernates;
+extern char alt_resume_param[256];
+
+extern void copyback_post(void);
+extern int toi_hibernate(void);
+extern unsigned long extra_pd1_pages_used;
+
+#define SECTOR_SIZE 512
+
+extern void toi_early_boot_message(int can_erase_image, int default_answer,
+        char *warning_reason, ...);
+
+extern int do_check_can_resume(void);
+extern int do_toi_step(int step);
+extern int toi_launch_userspace_program(char *command, int channel_no,
+                int wait, int debug);
+
+extern char tuxonice_signature[9];
+
+extern int toi_start_other_threads(void);
+extern void toi_stop_other_threads(void);
+
+extern int toi_trace_index;
+#define TOI_TRACE_DEBUG(PFN, DESC, ...) \
+    do { \
+        if (test_action_state(TOI_TRACE_DEBUG_ON)) { \
+            printk("*TOI* %ld %02d" DESC "\n", PFN, toi_trace_index, ##__VA_ARGS__); \
+        } \
+    } while(0)
+
+#ifdef CONFIG_TOI_KEEP_IMAGE
+#define toi_keeping_image (test_action_state(TOI_KEEP_IMAGE) || test_action_state(TOI_INCREMENTAL_IMAGE))
+#else
+#define toi_keeping_image (0)
+#endif
+
+#ifdef CONFIG_TOI_INCREMENTAL
+extern void toi_reset_dirtiness_one(unsigned long pfn, int verbose);
+extern int toi_reset_dirtiness(int verbose);
+extern void toi_cbw_write(void);
+extern void toi_cbw_restore(void);
+extern int toi_allocate_cbw_data(void);
+extern void toi_free_cbw_data(void);
+extern int toi_cbw_init(void);
+extern void toi_mark_tasks_cbw(void);
+#else
+static inline int toi_reset_dirtiness(int verbose) { return 0; }
+#define toi_cbw_write() do { } while(0)
+#define toi_cbw_restore() do { } while(0)
+#define toi_allocate_cbw_data() do { } while(0)
+#define toi_free_cbw_data() do { } while(0)
+static inline int toi_cbw_init(void) { return 0; }
+#endif
+#endif