Include dependency graph for segment_manager.h:

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Data Structures
struct	segment_manager_main_init_args_

Macros
#define	SEGMENT_MANAGER_INVALID_APP_INDEX ((u32) ~0)

Typedefs
typedef struct _segment_manager_props	segment_manager_props_t

typedef struct _segment_manager	segment_manager_t

typedef struct segment_manager_main_init_args_	segment_manager_main_init_args_t

Functions
segment_manager_t *	segment_manager_alloc (void)

int	segment_manager_init (segment_manager_t *sm, u32 first_seg_size, u32 prealloc_fifo_pairs)
	Initializes segment manager based on options provided. More...

void	segment_manager_free (segment_manager_t *sm)
	Cleanup segment manager. More...

void	segment_manager_init_free (segment_manager_t *sm)
	Initiate segment manager cleanup. More...

segment_manager_t *	segment_manager_get (u32 index)

segment_manager_t *	segment_manager_get_if_valid (u32 index)

u32	segment_manager_index (segment_manager_t *sm)

int	segment_manager_add_segment (segment_manager_t *sm, u32 segment_size)
	Adds segment to segment manager's pool. More...

void	segment_manager_del_segment (segment_manager_t sm, fifo_segment_t fs)
	Remove segment without lock. More...

fifo_segment_t *	segment_manager_get_segment (segment_manager_t *sm, u32 segment_index)
	Reads a segment from the segment manager's pool without lock. More...

fifo_segment_t *	segment_manager_get_segment_w_handle (u64 sh)

fifo_segment_t *	segment_manager_get_segment_w_lock (segment_manager_t *sm, u32 segment_index)
	Reads a segment from the segment manager's pool and acquires reader lock. More...

int	segment_manager_add_first_segment (segment_manager_t *sm, u32 segment_size)

u64	segment_manager_make_segment_handle (u32 segment_manager_index, u32 segment_index)

u64	segment_manager_segment_handle (segment_manager_t sm, fifo_segment_t segment)

void	segment_manager_segment_reader_unlock (segment_manager_t *sm)

void	segment_manager_segment_writer_unlock (segment_manager_t *sm)

int	segment_manager_alloc_session_fifos (segment_manager_t sm, svm_fifo_t rx_fifo, svm_fifo_t *tx_fifo)

int	segment_manager_try_alloc_fifos (fifo_segment_t fs, u32 rx_fifo_size, u32 tx_fifo_size, svm_fifo_t rx_fifo, svm_fifo_t *tx_fifo)

void	segment_manager_dealloc_fifos (svm_fifo_t rx_fifo, svm_fifo_t tx_fifo)

int	segment_manager_grow_fifo (segment_manager_t sm, svm_fifo_t f, u32 size)
	Grows fifo owned by segment manager. More...

int	segment_manager_shrink_fifo (segment_manager_t sm, svm_fifo_t f, u32 size, u8 is_producer)
	Request to shrink fifo owned by segment manager. More...

int	segment_manager_collect_fifo_chunks (segment_manager_t sm, svm_fifo_t f)
	Collect fifo chunks that are no longer used. More...

u8	segment_manager_has_fifos (segment_manager_t *sm)

svm_msg_q_t *	segment_manager_alloc_queue (fifo_segment_t fs, segment_manager_props_t props)
	Allocates shm queue in the first segment. More...

void	segment_manager_dealloc_queue (segment_manager_t sm, svm_queue_t q)
	Frees shm queue allocated in the first segment. More...

svm_msg_q_t *	segment_manager_event_queue (segment_manager_t *sm)

u32	segment_manager_evt_q_expected_size (u32 q_size)

void	segment_manager_app_detach (segment_manager_t *sm)

void	segment_manager_del_sessions (segment_manager_t *sm)
	Cleanup segment manager sessions. More...

void	segment_manager_format_sessions (segment_manager_t *sm, int verbose)

void	segment_manager_main_init (segment_manager_main_init_args_t *a)

segment_manager_props_t *	segment_manager_props_init (segment_manager_props_t *sm)

Macro Definition Documentation

◆ SEGMENT_MANAGER_INVALID_APP_INDEX

#define SEGMENT_MANAGER_INVALID_APP_INDEX ((u32) ~0)

Definition at line 68 of file segment_manager.h.

Typedef Documentation

◆ segment_manager_main_init_args_t

typedef struct segment_manager_main_init_args_ segment_manager_main_init_args_t

◆ segment_manager_props_t

typedef struct _segment_manager_props segment_manager_props_t

◆ segment_manager_t

typedef struct _segment_manager segment_manager_t

Function Documentation

◆ segment_manager_add_first_segment()

int segment_manager_add_first_segment	(	segment_manager_t *	sm,
		u32	segment_size
	)

◆ segment_manager_add_segment()

int segment_manager_add_segment	(	segment_manager_t *	sm,
		u32	segment_size
	)

Adds segment to segment manager's pool.

If needed a writer's lock is acquired before allocating a new segment to avoid affecting any of the segments pool readers.

Definition at line 85 of file segment_manager.c.

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◆ segment_manager_alloc()

segment_manager_t* segment_manager_alloc ( void )

Definition at line 293 of file segment_manager.c.

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◆ segment_manager_alloc_queue()

svm_msg_q_t* segment_manager_alloc_queue	(	fifo_segment_t *	segment,
		segment_manager_props_t *	props
	)

Allocates shm queue in the first segment.

Must be called with lock held

Definition at line 749 of file segment_manager.c.

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◆ segment_manager_alloc_session_fifos()

int segment_manager_alloc_session_fifos	(	segment_manager_t *	sm,
		svm_fifo_t **	rx_fifo,
		svm_fifo_t **	tx_fifo
	)

Definition at line 551 of file segment_manager.c.

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◆ segment_manager_app_detach()

void segment_manager_app_detach ( segment_manager_t * sm )

Definition at line 67 of file segment_manager.c.

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◆ segment_manager_collect_fifo_chunks()

int segment_manager_collect_fifo_chunks	(	segment_manager_t *	sm,
		svm_fifo_t *	f
	)

Collect fifo chunks that are no longer used.

This should not be called unless SVM_FIFO_F_COLLECT_CHUNKS is set for the fifo. The chunks are returned to the fifo segment freelist.

Parameters

sm	segment manager that owns the fifo
f	fifo whose chunks are to be collected

Returns: 0 on success, error otherwise

Definition at line 696 of file segment_manager.c.

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◆ segment_manager_dealloc_fifos()

void segment_manager_dealloc_fifos	(	svm_fifo_t *	rx_fifo,
		svm_fifo_t *	tx_fifo
	)

Definition at line 638 of file segment_manager.c.

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◆ segment_manager_dealloc_queue()

void segment_manager_dealloc_queue	(	segment_manager_t *	sm,
		svm_queue_t *	q
	)

Frees shm queue allocated in the first segment.

Definition at line 793 of file segment_manager.c.

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◆ segment_manager_del_segment()

void segment_manager_del_segment	(	segment_manager_t *	sm,
		fifo_segment_t *	fs
	)

Remove segment without lock.

Definition at line 173 of file segment_manager.c.

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◆ segment_manager_del_sessions()

void segment_manager_del_sessions ( segment_manager_t * sm )

Cleanup segment manager sessions.

Initiates disconnects for all sessions 'owned' by a segment manager by leveraging the backpointers that fifos keep.

Parameters

sm	segment manager whose sessions are to be disconnected

Cleanup segment manager sessions.

Definition at line 471 of file segment_manager.c.

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◆ segment_manager_event_queue()

svm_msg_q_t* segment_manager_event_queue ( segment_manager_t * sm )

Definition at line 784 of file segment_manager.c.

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◆ segment_manager_evt_q_expected_size()

u32 segment_manager_evt_q_expected_size ( u32 q_size )

Definition at line 727 of file segment_manager.c.

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◆ segment_manager_format_sessions()

void segment_manager_format_sessions	(	segment_manager_t *	sm,
		int	verbose
	)

Definition at line 889 of file segment_manager.c.

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◆ segment_manager_free()

void segment_manager_free ( segment_manager_t * sm )

Cleanup segment manager.

Parameters

sm	segment manager to be freed

Definition at line 380 of file segment_manager.c.

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◆ segment_manager_get()

segment_manager_t* segment_manager_get ( u32 index )

Definition at line 422 of file segment_manager.c.

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◆ segment_manager_get_if_valid()

segment_manager_t* segment_manager_get_if_valid ( u32 index )

Definition at line 428 of file segment_manager.c.

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◆ segment_manager_get_segment()

fifo_segment_t* segment_manager_get_segment	(	segment_manager_t *	sm,
		u32	segment_index
	)

Reads a segment from the segment manager's pool without lock.

Definition at line 224 of file segment_manager.c.

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◆ segment_manager_get_segment_w_handle()

fifo_segment_t* segment_manager_get_segment_w_handle ( u64 sh )

Definition at line 253 of file segment_manager.c.

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◆ segment_manager_get_segment_w_lock()

fifo_segment_t* segment_manager_get_segment_w_lock	(	segment_manager_t *	sm,
		u32	segment_index
	)

Reads a segment from the segment manager's pool and acquires reader lock.

Caller must drop the reader's lock by calling segment_manager_segment_reader_unlock once it finishes working with the segment.

Definition at line 274 of file segment_manager.c.

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◆ segment_manager_grow_fifo()

int segment_manager_grow_fifo	(	segment_manager_t *	sm,
		svm_fifo_t *	f,
		u32	size
	)

Grows fifo owned by segment manager.

Parameters

sm	segment manager that owns the fifo
f	fifo to be grown
size	amount of bytes to add to fifo

Returns: 0 on success, negative number otherwise

Definition at line 683 of file segment_manager.c.

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◆ segment_manager_has_fifos()

u8 segment_manager_has_fifos ( segment_manager_t * sm )

Definition at line 442 of file segment_manager.c.

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◆ segment_manager_index()

u32 segment_manager_index ( segment_manager_t * sm )

Definition at line 436 of file segment_manager.c.

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◆ segment_manager_init()

int segment_manager_init	(	segment_manager_t *	sm,
		u32	first_seg_size,
		u32	prealloc_fifo_pairs
	)

Initializes segment manager based on options provided.

Returns error if ssvm segment(s) allocation fails.

Definition at line 308 of file segment_manager.c.

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◆ segment_manager_init_free()

void segment_manager_init_free ( segment_manager_t * sm )

Initiate segment manager cleanup.

Parameters

sm	segment manager to be freed

Definition at line 409 of file segment_manager.c.

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◆ segment_manager_main_init()

void segment_manager_main_init ( segment_manager_main_init_args_t * a )

Definition at line 814 of file segment_manager.c.

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◆ segment_manager_make_segment_handle()

u64 segment_manager_make_segment_handle	(	u32	segment_manager_index,
		u32	segment_index
	)

Definition at line 246 of file segment_manager.c.

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◆ segment_manager_props_init()

segment_manager_props_t* segment_manager_props_init ( segment_manager_props_t * sm )

Definition at line 51 of file segment_manager.c.

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◆ segment_manager_segment_handle()

u64 segment_manager_segment_handle	(	segment_manager_t *	sm,
		fifo_segment_t *	segment
	)

Definition at line 230 of file segment_manager.c.

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◆ segment_manager_segment_reader_unlock()

void segment_manager_segment_reader_unlock ( segment_manager_t * sm )

Definition at line 281 of file segment_manager.c.

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◆ segment_manager_segment_writer_unlock()

void segment_manager_segment_writer_unlock ( segment_manager_t * sm )

Definition at line 287 of file segment_manager.c.

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◆ segment_manager_shrink_fifo()

int segment_manager_shrink_fifo	(	segment_manager_t *	sm,
		svm_fifo_t *	f,
		u32	size,
		u8	is_producer
	)

Request to shrink fifo owned by segment manager.

If this is not called by the producer, no attempt is made to reduce the size until the producer tries to enqueue more data. To collect the chunks that are to be removed call segment_manager_collect_fifo_chunks

Size reduction does not affect fifo chunk boundaries. Therefore chunks are not split and the amount of bytes to be removed can be equal to or less than what was requested.

Parameters

sm	segment manager that owns the fifo
f	fifo to be shrunk
size	amount of bytes to remove from fifo
is_producer	flag that indicates is caller is the producer for the fifo.

Returns: actual number of bytes to be removed

Definition at line 709 of file segment_manager.c.

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◆ segment_manager_try_alloc_fifos()

int segment_manager_try_alloc_fifos	(	fifo_segment_t *	fs,
		u32	rx_fifo_size,
		u32	tx_fifo_size,
		svm_fifo_t **	rx_fifo,
		svm_fifo_t **	tx_fifo
	)

Definition at line 515 of file segment_manager.c.

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Data Structures

Macros

Typedefs

Functions

Macro Definition Documentation

◆ SEGMENT_MANAGER_INVALID_APP_INDEX

Typedef Documentation

◆ segment_manager_main_init_args_t

◆ segment_manager_props_t

◆ segment_manager_t

Function Documentation

◆ segment_manager_add_first_segment()

◆ segment_manager_add_segment()

◆ segment_manager_alloc()

◆ segment_manager_alloc_queue()

◆ segment_manager_alloc_session_fifos()

◆ segment_manager_app_detach()

◆ segment_manager_collect_fifo_chunks()

◆ segment_manager_dealloc_fifos()

◆ segment_manager_dealloc_queue()

◆ segment_manager_del_segment()

◆ segment_manager_del_sessions()

◆ segment_manager_event_queue()

◆ segment_manager_evt_q_expected_size()

◆ segment_manager_format_sessions()

◆ segment_manager_free()

◆ segment_manager_get()

◆ segment_manager_get_if_valid()

◆ segment_manager_get_segment()

◆ segment_manager_get_segment_w_handle()

◆ segment_manager_get_segment_w_lock()

◆ segment_manager_grow_fifo()

◆ segment_manager_has_fifos()

◆ segment_manager_index()

◆ segment_manager_init()

◆ segment_manager_init_free()

◆ segment_manager_main_init()

◆ segment_manager_make_segment_handle()

◆ segment_manager_props_init()

◆ segment_manager_segment_handle()

◆ segment_manager_segment_reader_unlock()

◆ segment_manager_segment_writer_unlock()

◆ segment_manager_shrink_fifo()

◆ segment_manager_try_alloc_fifos()