dect/linux-2.6
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Pull tables-in-sysfs into release branch

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This commit is contained in:
Len Brown 2007-07-22 04:14:18 -04:00
commit 17c50b4102
1 changed files with 144 additions and 21 deletions
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165
drivers/acpi/system.c
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@ -39,15 +39,12 @@ ACPI_MODULE_NAME("system");
#define ACPI_SYSTEM_CLASS "system"
#define ACPI_SYSTEM_DEVICE_NAME "System"
#define ACPI_SYSTEM_FILE_INFO "info"
#define ACPI_SYSTEM_FILE_EVENT "event"
#define ACPI_SYSTEM_FILE_DSDT "dsdt"
#define ACPI_SYSTEM_FILE_FADT "fadt"
/*
* Make ACPICA version work as module param
*/
static int param_get_acpica_version(char *buffer, struct kernel_param *kp) {
static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
{
int result;
result = sprintf(buffer, "%x", ACPI_CA_VERSION);
@ -57,10 +54,127 @@ static int param_get_acpica_version(char *buffer, struct kernel_param *kp) {
module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
/* --------------------------------------------------------------------------
FS Interface (/sys)
-------------------------------------------------------------------------- */
static LIST_HEAD(acpi_table_attr_list);
static struct kobject tables_kobj;
struct acpi_table_attr {
struct bin_attribute attr;
char name[8];
int instance;
struct list_head node;
};
static ssize_t acpi_table_show(struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t offset, size_t count)
{
struct acpi_table_attr *table_attr =
container_of(bin_attr, struct acpi_table_attr, attr);
struct acpi_table_header *table_header = NULL;
acpi_status status;
ssize_t ret_count = count;
status =
acpi_get_table(table_attr->name, table_attr->instance,
&table_header);
if (ACPI_FAILURE(status))
return -ENODEV;
if (offset >= table_header->length) {
ret_count = 0;
goto end;
}
if (offset + ret_count > table_header->length)
ret_count = table_header->length - offset;
memcpy(buf, ((char *)table_header) + offset, ret_count);
end:
return ret_count;
}
static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
struct acpi_table_header *table_header)
{
struct acpi_table_header *header = NULL;
struct acpi_table_attr *attr = NULL;
memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);
list_for_each_entry(attr, &acpi_table_attr_list, node) {
if (!memcmp(table_header->signature, attr->name,
ACPI_NAME_SIZE))
if (table_attr->instance < attr->instance)
table_attr->instance = attr->instance;
}
table_attr->instance++;
if (table_attr->instance > 1 || (table_attr->instance == 1 &&
!acpi_get_table(table_header->
signature, 2,
&header)))
sprintf(table_attr->name + 4, "%d", table_attr->instance);
table_attr->attr.size = 0;
table_attr->attr.read = acpi_table_show;
table_attr->attr.attr.name = table_attr->name;
table_attr->attr.attr.mode = 0444;
table_attr->attr.attr.owner = THIS_MODULE;
return;
}
static int acpi_system_sysfs_init(void)
{
struct acpi_table_attr *table_attr;
struct acpi_table_header *table_header = NULL;
int table_index = 0;
int result;
tables_kobj.parent = &acpi_subsys.kobj;
kobject_set_name(&tables_kobj, "tables");
result = kobject_register(&tables_kobj);
if (result)
return result;
do {
result = acpi_get_table_by_index(table_index, &table_header);
if (!result) {
table_index++;
table_attr = NULL;
table_attr =
kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
if (!table_attr)
return -ENOMEM;
acpi_table_attr_init(table_attr, table_header);
result =
sysfs_create_bin_file(&tables_kobj,
&table_attr->attr);
if (result) {
kfree(table_attr);
return result;
} else
list_add_tail(&table_attr->node,
&acpi_table_attr_list);
}
} while (!result);
return 0;
}
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_INFO "info"
#define ACPI_SYSTEM_FILE_EVENT "event"
#define ACPI_SYSTEM_FILE_DSDT "dsdt"
#define ACPI_SYSTEM_FILE_FADT "fadt"
static int acpi_system_read_info(struct seq_file *seq, void *offset)
{
@ -80,7 +194,6 @@ static const struct file_operations acpi_system_info_ops = {
.llseek = seq_lseek,
.release = single_release,
};
#endif
static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
loff_t *);
@ -97,13 +210,11 @@ acpi_system_read_dsdt(struct file *file,
struct acpi_table_header *dsdt = NULL;
ssize_t res;
status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
if (ACPI_FAILURE(status))
return -ENODEV;
res = simple_read_from_buffer(buffer, count, ppos,
dsdt, dsdt->length);
res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
return res;
}
@ -123,28 +234,21 @@ acpi_system_read_fadt(struct file *file,
struct acpi_table_header *fadt = NULL;
ssize_t res;
status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
if (ACPI_FAILURE(status))
return -ENODEV;
res = simple_read_from_buffer(buffer, count, ppos,
fadt, fadt->length);
res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
return res;
}
static int __init acpi_system_init(void)
static int acpi_system_procfs_init(void)
{
struct proc_dir_entry *entry;
int error = 0;
char *name;
if (acpi_disabled)
return 0;
#ifdef CONFIG_ACPI_PROCFS
/* 'info' [R] */
name = ACPI_SYSTEM_FILE_INFO;
entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
@ -153,7 +257,6 @@ static int __init acpi_system_init(void)
else {
entry->proc_fops = &acpi_system_info_ops;
}
#endif
/* 'dsdt' [R] */
name = ACPI_SYSTEM_FILE_DSDT;
@ -177,12 +280,32 @@ static int __init acpi_system_init(void)
Error:
remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
#ifdef CONFIG_ACPI_PROCFS
remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
#endif
error = -EFAULT;
goto Done;
}
#else
static int acpi_system_procfs_init(void)
{
return 0;
}
#endif
static int __init acpi_system_init(void)
{
int result = 0;
if (acpi_disabled)
return 0;
result = acpi_system_procfs_init();
if (result)
return result;
result = acpi_system_sysfs_init();
return result;
}
subsys_initcall(acpi_system_init);