include/uapi/linux/surface_aggregator/cdev.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/surface_aggregator/cdev.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/surface_aggregator/cdev.h
Extension
.h
Size
5145 bytes
Lines
148
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct ssam_cdev_request {
	__u8 target_category;
	__u8 target_id;
	__u8 command_id;
	__u8 instance_id;
	__u16 flags;
	__s16 status;

	struct {
		__u64 data;
		__u16 length;
		__u8 __pad[6];
	} payload;

	struct {
		__u64 data;
		__u16 length;
		__u8 __pad[6];
	} response;
} __attribute__((__packed__));

/**
 * struct ssam_cdev_notifier_desc - Notifier descriptor.
 * @priority:        Priority value determining the order in which notifier
 *                   callbacks will be called. A higher value means higher
 *                   priority, i.e. the associated callback will be executed
 *                   earlier than other (lower priority) callbacks.
 * @target_category: The event target category for which this notifier should
 *                   receive events.
 *
 * Specifies the notifier that should be registered or unregistered,
 * specifically with which priority and for which target category of events.
 */
struct ssam_cdev_notifier_desc {
	__s32 priority;
	__u8 target_category;
} __attribute__((__packed__));

/**
 * struct ssam_cdev_event_desc - Event descriptor.
 * @reg:                 Registry via which the event will be enabled/disabled.
 * @reg.target_category: Target category for the event registry requests.
 * @reg.target_id:       Target ID for the event registry requests.
 * @reg.cid_enable:      Command ID for the event-enable request.
 * @reg.cid_disable:     Command ID for the event-disable request.
 * @id:                  ID specifying the event.
 * @id.target_category:  Target category of the event source.
 * @id.instance:         Instance ID of the event source.
 * @flags:               Flags used for enabling the event.
 *
 * Specifies which event should be enabled/disabled and how to do that.
 */
struct ssam_cdev_event_desc {
	struct {
		__u8 target_category;
		__u8 target_id;
		__u8 cid_enable;
		__u8 cid_disable;
	} reg;

	struct {
		__u8 target_category;
		__u8 instance;
	} id;

	__u8 flags;
} __attribute__((__packed__));

/**
 * struct ssam_cdev_event - SSAM event sent by the EC.
 * @target_category: Target category of the event source. See &enum ssam_ssh_tc.
 * @target_id:       Target ID of the event source.
 * @command_id:      Command ID of the event.
 * @instance_id:     Instance ID of the event source.
 * @length:          Length of the event payload in bytes.
 * @data:            Event payload data.
 */
struct ssam_cdev_event {
	__u8 target_category;
	__u8 target_id;
	__u8 command_id;
	__u8 instance_id;
	__u16 length;
	__u8 data[];
} __attribute__((__packed__));

#define SSAM_CDEV_REQUEST		_IOWR(0xA5, 1, struct ssam_cdev_request)
#define SSAM_CDEV_NOTIF_REGISTER	_IOW(0xA5, 2, struct ssam_cdev_notifier_desc)
#define SSAM_CDEV_NOTIF_UNREGISTER	_IOW(0xA5, 3, struct ssam_cdev_notifier_desc)
#define SSAM_CDEV_EVENT_ENABLE		_IOW(0xA5, 4, struct ssam_cdev_event_desc)

Annotation

Implementation Notes