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path: root/drivers/acpi/sysfs.c
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Diffstat (limited to 'drivers/acpi/sysfs.c')
-rw-r--r--drivers/acpi/sysfs.c99
1 files changed, 61 insertions, 38 deletions
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 358165e9f5b8..703c26e7022c 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -314,10 +314,14 @@ static struct kobject *tables_kobj;
static struct kobject *dynamic_tables_kobj;
static struct kobject *hotplug_kobj;
+#define ACPI_MAX_TABLE_INSTANCES 999
+#define ACPI_INST_SIZE 4 /* including trailing 0 */
+
struct acpi_table_attr {
struct bin_attribute attr;
- char name[8];
+ char name[ACPI_NAME_SIZE];
int instance;
+ char filename[ACPI_NAME_SIZE+ACPI_INST_SIZE];
struct list_head node;
};
@@ -329,14 +333,9 @@ static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
container_of(bin_attr, struct acpi_table_attr, attr);
struct acpi_table_header *table_header = NULL;
acpi_status status;
- char name[ACPI_NAME_SIZE];
-
- if (strncmp(table_attr->name, "NULL", 4))
- memcpy(name, table_attr->name, ACPI_NAME_SIZE);
- else
- memcpy(name, "\0\0\0\0", 4);
- status = acpi_get_table(name, table_attr->instance, &table_header);
+ status = acpi_get_table(table_attr->name, table_attr->instance,
+ &table_header);
if (ACPI_FAILURE(status))
return -ENODEV;
@@ -344,38 +343,45 @@ static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
table_header, table_header->length);
}
-static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
- struct acpi_table_header *table_header)
+static int acpi_table_attr_init(struct kobject *tables_obj,
+ struct acpi_table_attr *table_attr,
+ struct acpi_table_header *table_header)
{
struct acpi_table_header *header = NULL;
struct acpi_table_attr *attr = NULL;
+ char instance_str[ACPI_INST_SIZE];
sysfs_attr_init(&table_attr->attr.attr);
- if (table_header->signature[0] != '\0')
- memcpy(table_attr->name, table_header->signature,
- ACPI_NAME_SIZE);
- else
- memcpy(table_attr->name, "NULL", 4);
+ ACPI_MOVE_NAME(table_attr->name, table_header->signature);
list_for_each_entry(attr, &acpi_table_attr_list, node) {
- if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
+ if (ACPI_COMPARE_NAME(table_attr->name, attr->name))
if (table_attr->instance < attr->instance)
table_attr->instance = attr->instance;
}
table_attr->instance++;
+ if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) {
+ pr_warn("%4.4s: too many table instances\n",
+ table_attr->name);
+ return -ERANGE;
+ }
+ ACPI_MOVE_NAME(table_attr->filename, table_header->signature);
+ table_attr->filename[ACPI_NAME_SIZE] = '\0';
if (table_attr->instance > 1 || (table_attr->instance == 1 &&
!acpi_get_table
- (table_header->signature, 2, &header)))
- sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
- table_attr->instance);
+ (table_header->signature, 2, &header))) {
+ snprintf(instance_str, sizeof(instance_str), "%u",
+ table_attr->instance);
+ strcat(table_attr->filename, instance_str);
+ }
table_attr->attr.size = table_header->length;
table_attr->attr.read = acpi_table_show;
- table_attr->attr.attr.name = table_attr->name;
+ table_attr->attr.attr.name = table_attr->filename;
table_attr->attr.attr.mode = 0400;
- return;
+ return sysfs_create_bin_file(tables_obj, &table_attr->attr);
}
acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
@@ -383,21 +389,22 @@ acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
struct acpi_table_attr *table_attr;
switch (event) {
- case ACPI_TABLE_EVENT_LOAD:
+ case ACPI_TABLE_EVENT_INSTALL:
table_attr =
kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
if (!table_attr)
return AE_NO_MEMORY;
- acpi_table_attr_init(table_attr, table);
- if (sysfs_create_bin_file(dynamic_tables_kobj,
- &table_attr->attr)) {
+ if (acpi_table_attr_init(dynamic_tables_kobj,
+ table_attr, table)) {
kfree(table_attr);
return AE_ERROR;
- } else
- list_add_tail(&table_attr->node, &acpi_table_attr_list);
+ }
+ list_add_tail(&table_attr->node, &acpi_table_attr_list);
break;
+ case ACPI_TABLE_EVENT_LOAD:
case ACPI_TABLE_EVENT_UNLOAD:
+ case ACPI_TABLE_EVENT_UNINSTALL:
/*
* we do not need to do anything right now
* because the table is not deleted from the
@@ -435,13 +442,12 @@ static int acpi_tables_sysfs_init(void)
if (ACPI_FAILURE(status))
continue;
- table_attr = NULL;
table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
if (!table_attr)
return -ENOMEM;
- acpi_table_attr_init(table_attr, table_header);
- ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
+ ret = acpi_table_attr_init(tables_kobj,
+ table_attr, table_header);
if (ret) {
kfree(table_attr);
return ret;
@@ -597,14 +603,27 @@ static ssize_t counter_show(struct kobject *kobj,
if (result)
goto end;
+ if (status & ACPI_EVENT_FLAG_ENABLE_SET)
+ size += sprintf(buf + size, " EN");
+ else
+ size += sprintf(buf + size, " ");
+ if (status & ACPI_EVENT_FLAG_STATUS_SET)
+ size += sprintf(buf + size, " STS");
+ else
+ size += sprintf(buf + size, " ");
+
if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
- size += sprintf(buf + size, " invalid");
+ size += sprintf(buf + size, " invalid ");
else if (status & ACPI_EVENT_FLAG_ENABLED)
- size += sprintf(buf + size, " enabled");
+ size += sprintf(buf + size, " enabled ");
else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
- size += sprintf(buf + size, " wake_enabled");
+ size += sprintf(buf + size, " wake_enabled");
+ else
+ size += sprintf(buf + size, " disabled ");
+ if (status & ACPI_EVENT_FLAG_MASKED)
+ size += sprintf(buf + size, " masked ");
else
- size += sprintf(buf + size, " disabled");
+ size += sprintf(buf + size, " unmasked");
end:
size += sprintf(buf + size, "\n");
@@ -655,8 +674,12 @@ static ssize_t counter_set(struct kobject *kobj,
!(status & ACPI_EVENT_FLAG_ENABLED))
result = acpi_enable_gpe(handle, index);
else if (!strcmp(buf, "clear\n") &&
- (status & ACPI_EVENT_FLAG_SET))
+ (status & ACPI_EVENT_FLAG_STATUS_SET))
result = acpi_clear_gpe(handle, index);
+ else if (!strcmp(buf, "mask\n"))
+ result = acpi_mask_gpe(handle, index, TRUE);
+ else if (!strcmp(buf, "unmask\n"))
+ result = acpi_mask_gpe(handle, index, FALSE);
else if (!kstrtoul(buf, 0, &tmp))
all_counters[index].count = tmp;
else
@@ -664,13 +687,13 @@ static ssize_t counter_set(struct kobject *kobj,
} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
int event = index - num_gpes;
if (!strcmp(buf, "disable\n") &&
- (status & ACPI_EVENT_FLAG_ENABLED))
+ (status & ACPI_EVENT_FLAG_ENABLE_SET))
result = acpi_disable_event(event, ACPI_NOT_ISR);
else if (!strcmp(buf, "enable\n") &&
- !(status & ACPI_EVENT_FLAG_ENABLED))
+ !(status & ACPI_EVENT_FLAG_ENABLE_SET))
result = acpi_enable_event(event, ACPI_NOT_ISR);
else if (!strcmp(buf, "clear\n") &&
- (status & ACPI_EVENT_FLAG_SET))
+ (status & ACPI_EVENT_FLAG_STATUS_SET))
result = acpi_clear_event(event);
else if (!kstrtoul(buf, 0, &tmp))
all_counters[index].count = tmp;
generated by cgit v1.2.3 (git 2.39.0) at 2025-11-04 04:17:53 +0300