diff options
Diffstat (limited to 'kernel/power/tuxonice_sysfs.c')
| -rw-r--r-- | kernel/power/tuxonice_sysfs.c | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/kernel/power/tuxonice_sysfs.c b/kernel/power/tuxonice_sysfs.c deleted file mode 100644 index 77f36dbeb..000000000 --- a/kernel/power/tuxonice_sysfs.c +++ /dev/null @@ -1,333 +0,0 @@ -/* - * kernel/power/tuxonice_sysfs.c - * - * Copyright (C) 2002-2015 Nigel Cunningham (nigel at nigelcunningham com au) - * - * This file is released under the GPLv2. - * - * This file contains support for sysfs entries for tuning TuxOnIce. - * - * We have a generic handler that deals with the most common cases, and - * hooks for special handlers to use. - */ - -#include <linux/suspend.h> - -#include "tuxonice_sysfs.h" -#include "tuxonice.h" -#include "tuxonice_storage.h" -#include "tuxonice_alloc.h" - -static int toi_sysfs_initialised; - -static void toi_initialise_sysfs(void); - -static struct toi_sysfs_data sysfs_params[]; - -#define to_sysfs_data(_attr) container_of(_attr, struct toi_sysfs_data, attr) - -static void toi_main_wrapper(void) -{ - toi_try_hibernate(); -} - -static ssize_t toi_attr_show(struct kobject *kobj, struct attribute *attr, - char *page) -{ - struct toi_sysfs_data *sysfs_data = to_sysfs_data(attr); - int len = 0; - int full_prep = sysfs_data->flags & SYSFS_NEEDS_SM_FOR_READ; - - if (full_prep && toi_start_anything(0)) - return -EBUSY; - - if (sysfs_data->flags & SYSFS_NEEDS_SM_FOR_READ) - toi_prepare_usm(); - - switch (sysfs_data->type) { - case TOI_SYSFS_DATA_CUSTOM: - len = (sysfs_data->data.special.read_sysfs) ? - (sysfs_data->data.special.read_sysfs)(page, PAGE_SIZE) - : 0; - break; - case TOI_SYSFS_DATA_BIT: - len = sprintf(page, "%d\n", - -test_bit(sysfs_data->data.bit.bit, - sysfs_data->data.bit.bit_vector)); - break; - case TOI_SYSFS_DATA_INTEGER: - len = sprintf(page, "%d\n", - *(sysfs_data->data.integer.variable)); - break; - case TOI_SYSFS_DATA_LONG: - len = sprintf(page, "%ld\n", - *(sysfs_data->data.a_long.variable)); - break; - case TOI_SYSFS_DATA_UL: - len = sprintf(page, "%lu\n", - *(sysfs_data->data.ul.variable)); - break; - case TOI_SYSFS_DATA_STRING: - len = sprintf(page, "%s\n", - sysfs_data->data.string.variable); - break; - } - - if (sysfs_data->flags & SYSFS_NEEDS_SM_FOR_READ) - toi_cleanup_usm(); - - if (full_prep) - toi_finish_anything(0); - - return len; -} - -#define BOUND(_variable, _type) do { \ - if (*_variable < sysfs_data->data._type.minimum) \ - *_variable = sysfs_data->data._type.minimum; \ - else if (*_variable > sysfs_data->data._type.maximum) \ - *_variable = sysfs_data->data._type.maximum; \ -} while (0) - -static ssize_t toi_attr_store(struct kobject *kobj, struct attribute *attr, - const char *my_buf, size_t count) -{ - int assigned_temp_buffer = 0, result = count; - struct toi_sysfs_data *sysfs_data = to_sysfs_data(attr); - - if (toi_start_anything((sysfs_data->flags & SYSFS_HIBERNATE_OR_RESUME))) - return -EBUSY; - - ((char *) my_buf)[count] = 0; - - if (sysfs_data->flags & SYSFS_NEEDS_SM_FOR_WRITE) - toi_prepare_usm(); - - switch (sysfs_data->type) { - case TOI_SYSFS_DATA_CUSTOM: - if (sysfs_data->data.special.write_sysfs) - result = (sysfs_data->data.special.write_sysfs)(my_buf, - count); - break; - case TOI_SYSFS_DATA_BIT: - { - unsigned long value; - result = kstrtoul(my_buf, 0, &value); - if (result) - break; - if (value) - set_bit(sysfs_data->data.bit.bit, - (sysfs_data->data.bit.bit_vector)); - else - clear_bit(sysfs_data->data.bit.bit, - (sysfs_data->data.bit.bit_vector)); - } - break; - case TOI_SYSFS_DATA_INTEGER: - { - long temp; - result = kstrtol(my_buf, 0, &temp); - if (result) - break; - *(sysfs_data->data.integer.variable) = (int) temp; - BOUND(sysfs_data->data.integer.variable, integer); - break; - } - case TOI_SYSFS_DATA_LONG: - { - long *variable = - sysfs_data->data.a_long.variable; - result = kstrtol(my_buf, 0, variable); - if (result) - break; - BOUND(variable, a_long); - break; - } - case TOI_SYSFS_DATA_UL: - { - unsigned long *variable = - sysfs_data->data.ul.variable; - result = kstrtoul(my_buf, 0, variable); - if (result) - break; - BOUND(variable, ul); - break; - } - break; - case TOI_SYSFS_DATA_STRING: - { - int copy_len = count; - char *variable = - sysfs_data->data.string.variable; - - if (sysfs_data->data.string.max_length && - (copy_len > sysfs_data->data.string.max_length)) - copy_len = sysfs_data->data.string.max_length; - - if (!variable) { - variable = (char *) toi_get_zeroed_page(31, - TOI_ATOMIC_GFP); - sysfs_data->data.string.variable = variable; - assigned_temp_buffer = 1; - } - strncpy(variable, my_buf, copy_len); - if (copy_len && my_buf[copy_len - 1] == '\n') - variable[count - 1] = 0; - variable[count] = 0; - } - break; - } - - if (!result) - result = count; - - /* Side effect routine? */ - if (result == count && sysfs_data->write_side_effect) - sysfs_data->write_side_effect(); - - /* Free temporary buffers */ - if (assigned_temp_buffer) { - toi_free_page(31, - (unsigned long) sysfs_data->data.string.variable); - sysfs_data->data.string.variable = NULL; - } - - if (sysfs_data->flags & SYSFS_NEEDS_SM_FOR_WRITE) - toi_cleanup_usm(); - - toi_finish_anything(sysfs_data->flags & SYSFS_HIBERNATE_OR_RESUME); - - return result; -} - -static struct sysfs_ops toi_sysfs_ops = { - .show = &toi_attr_show, - .store = &toi_attr_store, -}; - -static struct kobj_type toi_ktype = { - .sysfs_ops = &toi_sysfs_ops, -}; - -struct kobject *tuxonice_kobj; - -/* Non-module sysfs entries. - * - * This array contains entries that are automatically registered at - * boot. Modules and the console code register their own entries separately. - */ - -static struct toi_sysfs_data sysfs_params[] = { - SYSFS_CUSTOM("do_hibernate", SYSFS_WRITEONLY, NULL, NULL, - SYSFS_HIBERNATING, toi_main_wrapper), - SYSFS_CUSTOM("do_resume", SYSFS_WRITEONLY, NULL, NULL, - SYSFS_RESUMING, toi_try_resume) -}; - -void remove_toi_sysdir(struct kobject *kobj) -{ - if (!kobj) - return; - - kobject_put(kobj); -} - -struct kobject *make_toi_sysdir(char *name) -{ - struct kobject *kobj = kobject_create_and_add(name, tuxonice_kobj); - - if (!kobj) { - printk(KERN_INFO "TuxOnIce: Can't allocate kobject for sysfs " - "dir!\n"); - return NULL; - } - - kobj->ktype = &toi_ktype; - - return kobj; -} - -/* toi_register_sysfs_file - * - * Helper for registering a new /sysfs/tuxonice entry. - */ - -int toi_register_sysfs_file( - struct kobject *kobj, - struct toi_sysfs_data *toi_sysfs_data) -{ - int result; - - if (!toi_sysfs_initialised) - toi_initialise_sysfs(); - - result = sysfs_create_file(kobj, &toi_sysfs_data->attr); - if (result) - printk(KERN_INFO "TuxOnIce: sysfs_create_file for %s " - "returned %d.\n", - toi_sysfs_data->attr.name, result); - kobj->ktype = &toi_ktype; - - return result; -} - -/* toi_unregister_sysfs_file - * - * Helper for removing unwanted /sys/power/tuxonice entries. - * - */ -void toi_unregister_sysfs_file(struct kobject *kobj, - struct toi_sysfs_data *toi_sysfs_data) -{ - sysfs_remove_file(kobj, &toi_sysfs_data->attr); -} - -void toi_cleanup_sysfs(void) -{ - int i, - numfiles = sizeof(sysfs_params) / sizeof(struct toi_sysfs_data); - - if (!toi_sysfs_initialised) - return; - - for (i = 0; i < numfiles; i++) - toi_unregister_sysfs_file(tuxonice_kobj, &sysfs_params[i]); - - kobject_put(tuxonice_kobj); - toi_sysfs_initialised = 0; -} - -/* toi_initialise_sysfs - * - * Initialise the /sysfs/tuxonice directory. - */ - -static void toi_initialise_sysfs(void) -{ - int i; - int numfiles = sizeof(sysfs_params) / sizeof(struct toi_sysfs_data); - - if (toi_sysfs_initialised) - return; - - /* Make our TuxOnIce directory a child of /sys/power */ - tuxonice_kobj = kobject_create_and_add("tuxonice", power_kobj); - if (!tuxonice_kobj) - return; - - toi_sysfs_initialised = 1; - - for (i = 0; i < numfiles; i++) - toi_register_sysfs_file(tuxonice_kobj, &sysfs_params[i]); -} - -int toi_sysfs_init(void) -{ - toi_initialise_sysfs(); - return 0; -} - -void toi_sysfs_exit(void) -{ - toi_cleanup_sysfs(); -} |