dataspace.c File Reference

Control / Data dataspace handling. More...

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Functions
static int	__get_dm_id (void)
	Request dataspace manager from L4 environment.
static l4_size_t	__get_ctrl_ds_size (dsi_stream_cfg_t cfg)
	Calculate control dataspace size.
static void	__init_ctrl_ds (l4_addr_t map_addr, l4_size_t size, dsi_stream_cfg_t cfg)
	Initialize control dataspace.
static int	__map_ctrl_ds (dsi_socket_t *socket, dsi_stream_cfg_t cfg)
	Map control dataspace, setup pointers in socket structure.
int	dsi_create_ctrl_area (dsi_socket_t *socket, dsi_jcp_stream_t jcp_stream, dsi_stream_cfg_t cfg)
	Allocate and setup control area.
int	dsi_set_ctrl_area (dsi_socket_t *socket, l4dm_dataspace_t ctrl_ds, dsi_jcp_stream_t jcp_stream, dsi_stream_cfg_t cfg)
	Attach and setup control area.
int	dsi_release_ctrl_area (dsi_socket_t *socket)
	Release control dataspace.
int	dsi_set_data_area (dsi_socket_t *socket, l4dm_dataspace_t data_ds)
	Attach data dataspace.
int	dsi_release_data_area (dsi_socket_t *socket)
	Detach data dataspace.
void	dsi_init_dataspaces (void)
	Setup dataspace handling.
int	dsi_socket_share_ds (dsi_socket_t *socket, l4_threadid_t client)
	Share socket dataspaces.
void	dsi_ds_set_dataspace_manager (l4_threadid_t id)
	Set new dataspace manager.
int	dsi_ds_setup_ctrl_dataspace (l4dm_dataspace_t *ds, dsi_stream_cfg_t cfg)
	Setup control dataspace.
int	dsi_ds_create_ctrl_dataspace (dsi_stream_cfg_t cfg, l4dm_dataspace_t *ds)
	Create control dataspace.
Variables
static l4_threadid_t	dsi_dm_id = L4_INVALID_ID
	dataspace manager id
static l4_uint32_t	cds_map_area = -1
	map area control dataspaces
static l4_uint32_t	dds_map_area = -1
	map area data dataspaces

---

Detailed Description

Control / Data dataspace handling.

Date:

07/01/2000

Author:

Lars Reuther <reuther@os.inf.tu-dresden.de>

Todo:

Do not manage attach area for control / data datspaces (next_map_cds, next_map_dds), use l4rm instead (requires that l4rm provides alligned attachs to be able to map larger areas by just one flexpage).

Todo:

Rethink whole dataspace handling. Who creates/attaches/frees/detaches dataspaces.

Definition in file dataspace.c.

---

Function Documentation

static l4_size_t __get_ctrl_ds_size

(

dsi_stream_cfg_t

cfg

)

[inline, static]

Calculate control dataspace size.

Parameters:

cfg

Stream configuration

Returns:

Control dataspace size

Definition at line 95 of file dataspace.c.

References dsi_stream_cfg::max_sg, and dsi_stream_cfg::num_packets.

Referenced by dsi_create_ctrl_area(), dsi_ds_create_ctrl_dataspace(), and dsi_ds_setup_ctrl_dataspace().

static void __init_ctrl_ds	(	l4_addr_t	map_addr,
		l4_size_t	size,
		dsi_stream_cfg_t	cfg
	)			[static]

Initialize control dataspace.

Parameters:

	map_addr	Dataspace map address
	size	Dataspace size
	cfg	Stream configuration

Initialize data structures of control dataspace

Definition at line 114 of file dataspace.c.

References dsi_stream_cfg::max_sg, dsi_ctrl_header::max_sg_len, dsi_ctrl_header::num_packets, dsi_stream_cfg::num_packets, dsi_ctrl_header::num_sg_elems, dsi_ctrl_header::packets_committed, dsi_packet::rx_sem, and dsi_packet::tx_sem.

Referenced by dsi_create_ctrl_area(), dsi_ds_create_ctrl_dataspace(), and dsi_ds_setup_ctrl_dataspace().

int dsi_release_data_area

(

dsi_socket_t *

socket

)

Detach data dataspace.

Parameters:

socket

Socket descriptor

Returns:

0 on success, error code otherwise.

Definition at line 577 of file dataspace.c.

References dsi_socket::data_area, dsi_socket::data_ds, and dsi_socket::flags.

Referenced by dsi_socket_close().