include/uapi/fwctl/fwctl.h

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

File Facts

System
Linux kernel
Corpus path
include/uapi/fwctl/fwctl.h
Extension
.h
Size
4771 bytes
Lines
143
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fwctl_info {
	__u32 size;
	__u32 flags;
	__u32 out_device_type;
	__u32 device_data_len;
	__aligned_u64 out_device_data;
};
#define FWCTL_INFO _IO(FWCTL_TYPE, FWCTL_CMD_INFO)

/**
 * enum fwctl_rpc_scope - Scope of access for the RPC
 *
 * Refer to fwctl.rst for a more detailed discussion of these scopes.
 */
enum fwctl_rpc_scope {
	/**
	 * @FWCTL_RPC_CONFIGURATION: Device configuration access scope
	 *
	 * Read/write access to device configuration. When configuration
	 * is written to the device it remains in a fully supported state.
	 */
	FWCTL_RPC_CONFIGURATION = 0,
	/**
	 * @FWCTL_RPC_DEBUG_READ_ONLY: Read only access to debug information
	 *
	 * Readable debug information. Debug information is compatible with
	 * kernel lockdown, and does not disclose any sensitive information. For
	 * instance exposing any encryption secrets from this information is
	 * forbidden.
	 */
	FWCTL_RPC_DEBUG_READ_ONLY = 1,
	/**
	 * @FWCTL_RPC_DEBUG_WRITE: Writable access to lockdown compatible debug information
	 *
	 * Allows write access to data in the device which may leave a fully
	 * supported state. This is intended to permit intensive and possibly
	 * invasive debugging. This scope will taint the kernel.
	 */
	FWCTL_RPC_DEBUG_WRITE = 2,
	/**
	 * @FWCTL_RPC_DEBUG_WRITE_FULL: Write access to all debug information
	 *
	 * Allows read/write access to everything. Requires CAP_SYS_RAW_IO, so
	 * it is not required to follow lockdown principals. If in doubt
	 * debugging should be placed in this scope. This scope will taint the
	 * kernel.
	 */
	FWCTL_RPC_DEBUG_WRITE_FULL = 3,
};

/**
 * struct fwctl_rpc - ioctl(FWCTL_RPC)
 * @size: sizeof(struct fwctl_rpc)
 * @scope: One of enum fwctl_rpc_scope, required scope for the RPC
 * @in_len: Length of the in memory
 * @out_len: Length of the out memory
 * @in: Request message in device specific format
 * @out: Response message in device specific format
 *
 * Deliver a Remote Procedure Call to the device FW and return the response. The
 * call's parameters and return are marshaled into linear buffers of memory. Any
 * errno indicates that delivery of the RPC to the device failed. Return status
 * originating in the device during a successful delivery must be encoded into
 * out.
 *
 * The format of the buffers matches the out_device_type from FWCTL_INFO.
 */
struct fwctl_rpc {
	__u32 size;
	__u32 scope;
	__u32 in_len;
	__u32 out_len;
	__aligned_u64 in;
	__aligned_u64 out;
};
#define FWCTL_RPC _IO(FWCTL_TYPE, FWCTL_CMD_RPC)

#endif

Annotation

Implementation Notes