diff options
Diffstat (limited to 'kernel/power/tuxonice_builtin.c')
| -rw-r--r-- | kernel/power/tuxonice_builtin.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/kernel/power/tuxonice_builtin.c b/kernel/power/tuxonice_builtin.c deleted file mode 100644 index 22bf07a43..000000000 --- a/kernel/power/tuxonice_builtin.c +++ /dev/null @@ -1,498 +0,0 @@ -/* - * Copyright (C) 2004-2015 Nigel Cunningham (nigel at nigelcunningham com au) - * - * This file is released under the GPLv2. - */ -#include <linux/kernel.h> -#include <linux/swap.h> -#include <linux/syscalls.h> -#include <linux/bio.h> -#include <linux/root_dev.h> -#include <linux/freezer.h> -#include <linux/reboot.h> -#include <linux/writeback.h> -#include <linux/tty.h> -#include <linux/crypto.h> -#include <linux/cpu.h> -#include <linux/ctype.h> -#include <linux/kthread.h> -#include "tuxonice_io.h" -#include "tuxonice.h" -#include "tuxonice_extent.h" -#include "tuxonice_netlink.h" -#include "tuxonice_prepare_image.h" -#include "tuxonice_ui.h" -#include "tuxonice_sysfs.h" -#include "tuxonice_pagedir.h" -#include "tuxonice_modules.h" -#include "tuxonice_builtin.h" -#include "tuxonice_power_off.h" -#include "tuxonice_alloc.h" - -unsigned long toi_bootflags_mask; - -/* - * Highmem related functions (x86 only). - */ - -#ifdef CONFIG_HIGHMEM - -/** - * copyback_high: Restore highmem pages. - * - * Highmem data and pbe lists are/can be stored in highmem. - * The format is slightly different to the lowmem pbe lists - * used for the assembly code: the last pbe in each page is - * a struct page * instead of struct pbe *, pointing to the - * next page where pbes are stored (or NULL if happens to be - * the end of the list). Since we don't want to generate - * unnecessary deltas against swsusp code, we use a cast - * instead of a union. - **/ - -static void copyback_high(void) -{ - struct page *pbe_page = (struct page *) restore_highmem_pblist; - struct pbe *this_pbe, *first_pbe; - unsigned long *origpage, *copypage; - int pbe_index = 1; - - if (!pbe_page) - return; - - this_pbe = (struct pbe *) kmap_atomic(pbe_page); - first_pbe = this_pbe; - - while (this_pbe) { - int loop = (PAGE_SIZE / sizeof(unsigned long)) - 1; - - origpage = kmap_atomic(pfn_to_page((unsigned long) this_pbe->orig_address)); - copypage = kmap_atomic((struct page *) this_pbe->address); - - while (loop >= 0) { - *(origpage + loop) = *(copypage + loop); - loop--; - } - - kunmap_atomic(origpage); - kunmap_atomic(copypage); - - if (!this_pbe->next) - break; - - if (pbe_index < PBES_PER_PAGE) { - this_pbe++; - pbe_index++; - } else { - pbe_page = (struct page *) this_pbe->next; - kunmap_atomic(first_pbe); - if (!pbe_page) - return; - this_pbe = (struct pbe *) kmap_atomic(pbe_page); - first_pbe = this_pbe; - pbe_index = 1; - } - } - kunmap_atomic(first_pbe); -} - -#else /* CONFIG_HIGHMEM */ -static void copyback_high(void) { } -#endif - -char toi_wait_for_keypress_dev_console(int timeout) -{ - int fd, this_timeout = 255, orig_kthread = 0; - char key = '\0'; - struct termios t, t_backup; - - /* We should be guaranteed /dev/console exists after populate_rootfs() - * in init/main.c. - */ - fd = sys_open("/dev/console", O_RDONLY, 0); - if (fd < 0) { - printk(KERN_INFO "Couldn't open /dev/console.\n"); - return key; - } - - if (sys_ioctl(fd, TCGETS, (long)&t) < 0) - goto out_close; - - memcpy(&t_backup, &t, sizeof(t)); - - t.c_lflag &= ~(ISIG|ICANON|ECHO); - t.c_cc[VMIN] = 0; - -new_timeout: - if (timeout > 0) { - this_timeout = timeout < 26 ? timeout : 25; - timeout -= this_timeout; - this_timeout *= 10; - } - - t.c_cc[VTIME] = this_timeout; - - if (sys_ioctl(fd, TCSETS, (long)&t) < 0) - goto out_restore; - - if (current->flags & PF_KTHREAD) { - orig_kthread = (current->flags & PF_KTHREAD); - current->flags &= ~PF_KTHREAD; - } - - while (1) { - if (sys_read(fd, &key, 1) <= 0) { - if (timeout) - goto new_timeout; - key = '\0'; - break; - } - key = tolower(key); - if (test_toi_state(TOI_SANITY_CHECK_PROMPT)) { - if (key == 'c') { - set_toi_state(TOI_CONTINUE_REQ); - break; - } else if (key == ' ') - break; - } else - break; - } - if (orig_kthread) { - current->flags |= PF_KTHREAD; - } - -out_restore: - sys_ioctl(fd, TCSETS, (long)&t_backup); -out_close: - sys_close(fd); - - return key; -} - -struct toi_boot_kernel_data toi_bkd __nosavedata - __attribute__((aligned(PAGE_SIZE))) = { - MY_BOOT_KERNEL_DATA_VERSION, - 0, -#ifdef CONFIG_TOI_REPLACE_SWSUSP - (1 << TOI_REPLACE_SWSUSP) | -#endif - (1 << TOI_NO_FLUSHER_THREAD) | - (1 << TOI_PAGESET2_FULL), -}; - -struct block_device *toi_open_by_devnum(dev_t dev) -{ - struct block_device *bdev = bdget(dev); - int err = -ENOMEM; - if (bdev) - err = blkdev_get(bdev, FMODE_READ | FMODE_NDELAY, NULL); - return err ? ERR_PTR(err) : bdev; -} - -/** - * toi_close_bdev: Close a swap bdev. - * - * int: The swap entry number to close. - */ -void toi_close_bdev(struct block_device *bdev) -{ - blkdev_put(bdev, FMODE_READ | FMODE_NDELAY); -} - -int toi_wait = CONFIG_TOI_DEFAULT_WAIT; -struct toi_core_fns *toi_core_fns; -unsigned long toi_result; -struct pagedir pagedir1 = {1}; -struct toi_cbw **toi_first_cbw; -int toi_next_cbw; - -unsigned long toi_get_nonconflicting_page(void) -{ - return toi_core_fns->get_nonconflicting_page(); -} - -int toi_post_context_save(void) -{ - return toi_core_fns->post_context_save(); -} - -int try_tuxonice_hibernate(void) -{ - if (!toi_core_fns) - return -ENODEV; - - return toi_core_fns->try_hibernate(); -} - -static int num_resume_calls; -#ifdef CONFIG_TOI_IGNORE_LATE_INITCALL -static int ignore_late_initcall = 1; -#else -static int ignore_late_initcall; -#endif - -int toi_translate_err_default = TOI_CONTINUE_REQ; - -void try_tuxonice_resume(void) -{ - if (!hibernation_available()) - return; - - /* Don't let it wrap around eventually */ - if (num_resume_calls < 2) - num_resume_calls++; - - if (num_resume_calls == 1 && ignore_late_initcall) { - printk(KERN_INFO "TuxOnIce: Ignoring late initcall, as requested.\n"); - return; - } - - if (toi_core_fns) - toi_core_fns->try_resume(); - else - printk(KERN_INFO "TuxOnIce core not loaded yet.\n"); -} - -int toi_lowlevel_builtin(void) -{ - int error = 0; - - save_processor_state(); - error = swsusp_arch_suspend(); - if (error) - printk(KERN_ERR "Error %d hibernating\n", error); - - /* Restore control flow appears here */ - if (!toi_in_hibernate) { - copyback_high(); - set_toi_state(TOI_NOW_RESUMING); - } - - restore_processor_state(); - return error; -} - -unsigned long toi_compress_bytes_in; -unsigned long toi_compress_bytes_out; - -int toi_in_suspend(void) -{ - return in_suspend; -} - -unsigned long toi_state = ((1 << TOI_BOOT_TIME) | - (1 << TOI_IGNORE_LOGLEVEL) | - (1 << TOI_IO_STOPPED)); - -/* The number of hibernates we have started (some may have been cancelled) */ -unsigned int nr_hibernates; -int toi_running; -__nosavedata int toi_in_hibernate; -__nosavedata struct pbe *restore_highmem_pblist; - -int toi_trace_allocs; - -void toi_read_lock_tasklist(void) -{ - read_lock(&tasklist_lock); -} - -void toi_read_unlock_tasklist(void) -{ - read_unlock(&tasklist_lock); -} - -#ifdef CONFIG_TOI_ZRAM_SUPPORT -int (*toi_flag_zram_disks) (void); - -int toi_do_flag_zram_disks(void) -{ - return toi_flag_zram_disks ? (*toi_flag_zram_disks)() : 0; -} - -#endif - -/* toi_generate_free_page_map - * - * Description: This routine generates a bitmap of free pages from the - * lists used by the memory manager. We then use the bitmap - * to quickly calculate which pages to save and in which - * pagesets. - */ -void toi_generate_free_page_map(void) -{ - int order, cpu, t; - unsigned long flags, i; - struct zone *zone; - struct list_head *curr; - unsigned long pfn; - struct page *page; - - for_each_populated_zone(zone) { - - if (!zone->spanned_pages) - continue; - - spin_lock_irqsave(&zone->lock, flags); - - for (i = 0; i < zone->spanned_pages; i++) { - pfn = zone->zone_start_pfn + i; - - if (!pfn_valid(pfn)) - continue; - - page = pfn_to_page(pfn); - - ClearPageNosaveFree(page); - } - - for_each_migratetype_order(order, t) { - list_for_each(curr, - &zone->free_area[order].free_list[t]) { - unsigned long j; - - pfn = page_to_pfn(list_entry(curr, struct page, - lru)); - for (j = 0; j < (1UL << order); j++) - SetPageNosaveFree(pfn_to_page(pfn + j)); - } - } - - for_each_online_cpu(cpu) { - struct per_cpu_pageset *pset = - per_cpu_ptr(zone->pageset, cpu); - struct per_cpu_pages *pcp = &pset->pcp; - struct page *page; - int t; - - for (t = 0; t < MIGRATE_PCPTYPES; t++) - list_for_each_entry(page, &pcp->lists[t], lru) - SetPageNosaveFree(page); - } - - spin_unlock_irqrestore(&zone->lock, flags); - } -} - -/* toi_size_of_free_region - * - * Description: Return the number of pages that are free, beginning with and - * including this one. - */ -int toi_size_of_free_region(struct zone *zone, unsigned long start_pfn) -{ - unsigned long this_pfn = start_pfn, - end_pfn = zone_end_pfn(zone); - - while (pfn_valid(this_pfn) && this_pfn < end_pfn && PageNosaveFree(pfn_to_page(this_pfn))) - this_pfn++; - - return this_pfn - start_pfn; -} - -static int __init toi_wait_setup(char *str) -{ - int value; - - if (sscanf(str, "=%d", &value)) { - if (value < -1 || value > 255) - printk(KERN_INFO "TuxOnIce_wait outside range -1 to " - "255.\n"); - else - toi_wait = value; - } - - return 1; -} -__setup("toi_wait", toi_wait_setup); - -static int __init toi_translate_retry_setup(char *str) -{ - toi_translate_err_default = 0; - return 1; -} -__setup("toi_translate_retry", toi_translate_retry_setup); - -static int __init toi_debug_setup(char *str) -{ - toi_bkd.toi_action |= (1 << TOI_LOGALL); - toi_bootflags_mask |= (1 << TOI_LOGALL); - toi_bkd.toi_debug_state = 255; - toi_bkd.toi_default_console_level = 7; - return 1; -} -__setup("toi_debug_setup", toi_debug_setup); - -static int __init toi_pause_setup(char *str) -{ - toi_bkd.toi_action |= (1 << TOI_PAUSE); - toi_bootflags_mask |= (1 << TOI_PAUSE); - return 1; -} -__setup("toi_pause", toi_pause_setup); - -#ifdef CONFIG_PM_DEBUG -static int __init toi_trace_allocs_setup(char *str) -{ - int value; - - if (sscanf(str, "=%d", &value)) - toi_trace_allocs = value; - - return 1; -} -__setup("toi_trace_allocs", toi_trace_allocs_setup); -#endif - -static int __init toi_ignore_late_initcall_setup(char *str) -{ - int value; - - if (sscanf(str, "=%d", &value)) - ignore_late_initcall = value; - - return 1; -} -__setup("toi_initramfs_resume_only", toi_ignore_late_initcall_setup); - -static int __init toi_force_no_multithreaded_setup(char *str) -{ - int value; - - toi_bkd.toi_action &= ~(1 << TOI_NO_MULTITHREADED_IO); - toi_bootflags_mask |= (1 << TOI_NO_MULTITHREADED_IO); - - if (sscanf(str, "=%d", &value) && value) - toi_bkd.toi_action |= (1 << TOI_NO_MULTITHREADED_IO); - - return 1; -} -__setup("toi_no_multithreaded", toi_force_no_multithreaded_setup); - -#ifdef CONFIG_KGDB -static int __init toi_post_resume_breakpoint_setup(char *str) -{ - int value; - - toi_bkd.toi_action &= ~(1 << TOI_POST_RESUME_BREAKPOINT); - toi_bootflags_mask |= (1 << TOI_POST_RESUME_BREAKPOINT); - if (sscanf(str, "=%d", &value) && value) - toi_bkd.toi_action |= (1 << TOI_POST_RESUME_BREAKPOINT); - - return 1; -} -__setup("toi_post_resume_break", toi_post_resume_breakpoint_setup); -#endif - -static int __init toi_disable_readahead_setup(char *str) -{ - int value; - - toi_bkd.toi_action &= ~(1 << TOI_NO_READAHEAD); - toi_bootflags_mask |= (1 << TOI_NO_READAHEAD); - if (sscanf(str, "=%d", &value) && value) - toi_bkd.toi_action |= (1 << TOI_NO_READAHEAD); - - return 1; -} -__setup("toi_no_readahead", toi_disable_readahead_setup); |