Merge "android: binder: support for scatter-gather." (a051ba56) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/staging/android/Kconfig

+12 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,18 @@ config ANDROID_BINDER_IPC_32BIT

		Note that enabling this will break newer Android user-space.

		config ANDROID_BINDER_DEVICES
		string "Android Binder devices"
		depends on ANDROID_BINDER_IPC
		default "binder"
		---help---
		Default value for the binder.devices parameter.

		The binder.devices parameter is a comma-separated list of strings
		that specifies the names of the binder device nodes that will be
		created. Each binder device has its own context manager, and is
		therefore logically separated from the other devices.

		config ASHMEM
		bool "Enable the Anonymous Shared Memory Subsystem"
		default n

drivers/staging/android/binder.c

+647 −220

File changed.

Preview size limit exceeded, changes collapsed.

drivers/staging/android/uapi/binder.h

+73 −3

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@ enum {
		BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
		BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
		BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
		BINDER_TYPE_PTR = B_PACK_CHARS('p', 't', '*', B_TYPE_LARGE),
		};

		enum {
		@@ -47,6 +48,14 @@ typedef __u64 binder_size_t;
		typedef __u64 binder_uintptr_t;
		#endif

		/**
		* struct binder_object_header - header shared by all binder metadata objects.
		* @type: type of the object
		*/
		struct binder_object_header {
		__u32 type;
		};

		/*
		* This is the flattened representation of a Binder object for transfer
		* between processes. The 'offsets' supplied as part of a binder transaction
		@@ -55,8 +64,7 @@ typedef __u64 binder_uintptr_t;
		* between processes.
		*/
		struct flat_binder_object {
		/* 8 bytes for large_flat_header. */
		__u32 type;
		struct binder_object_header hdr;
		__u32 flags;

		/* 8 bytes of data. */
		@@ -69,6 +77,57 @@ struct flat_binder_object {
		binder_uintptr_t cookie;
		};

		/**
		* struct binder_fd_object - describes a filedescriptor to be fixed up.
		* @hdr: common header structure
		* @pad_flags: padding to remain compatible with old userspace code
		* @pad_binder: padding to remain compatible with old userspace code
		* @fd: file descriptor
		* @cookie: opaque data, used by user-space
		*/
		struct binder_fd_object {
		struct binder_object_header hdr;
		__u32 pad_flags;
		union {
		binder_uintptr_t pad_binder;
		__u32 fd;
		};

		binder_uintptr_t cookie;
		};

		/* struct binder_buffer_object - object describing a userspace buffer
		* @hdr: common header structure
		* @flags: one or more BINDER_BUFFER_* flags
		* @buffer: address of the buffer
		* @length: length of the buffer
		* @parent: index in offset array pointing to parent buffer
		* @parent_offset: offset in @parent pointing to this buffer
		*
		* A binder_buffer object represents an object that the
		* binder kernel driver can copy verbatim to the target
		* address space. A buffer itself may be pointed to from
		* within another buffer, meaning that the pointer inside
		* that other buffer needs to be fixed up as well. This
		* can be done by setting the BINDER_BUFFER_FLAG_HAS_PARENT
		* flag in @flags, by setting @parent buffer to the index
		* in the offset array pointing to the parent binder_buffer_object,
		* and by setting @parent_offset to the offset in the parent buffer
		* at which the pointer to this buffer is located.
		*/
		struct binder_buffer_object {
		struct binder_object_header hdr;
		__u32 flags;
		binder_uintptr_t buffer;
		binder_size_t length;
		binder_size_t parent;
		binder_size_t parent_offset;
		};

		enum {
		BINDER_BUFFER_FLAG_HAS_PARENT = 0x01,
		};

		/*
		* On 64-bit platforms where user code may run in 32-bits the driver must
		* translate the buffer (and local binder) addresses appropriately.
		@@ -161,6 +220,11 @@ struct binder_transaction_data {
		} data;
		};

		struct binder_transaction_data_sg {
		struct binder_transaction_data transaction_data;
		binder_size_t buffers_size;
		};

		struct binder_ptr_cookie {
		binder_uintptr_t ptr;
		binder_uintptr_t cookie;
		@@ -345,6 +409,12 @@ enum binder_driver_command_protocol {
		/*
		* void *: cookie
		*/

		BC_TRANSACTION_SG = _IOW('c', 17, struct binder_transaction_data_sg),
		BC_REPLY_SG = _IOW('c', 18, struct binder_transaction_data_sg),
		/*
		* binder_transaction_data_sg: the sent command.
		*/
		};

		#endif /* _UAPI_LINUX_BINDER_H */