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Vector Packet Processing
fifo_segment.h File Reference
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Data Structures

struct  fifo_segment_header_t
 
struct  fifo_segment_t
 
struct  fifo_segment_main_t
 
struct  fifo_segment_create_args_t
 

Macros

#define FIFO_SEGMENT_MIN_FIFO_SIZE   4096 /* 4kB min fifo size */
 
#define FIFO_SEGMENT_MAX_FIFO_SIZE   (2 << 30) /* 2GB max fifo size */
 
#define FIFO_SEGMENT_ALLOC_BATCH_SIZE   32 /* Allocation quantum */
 
#define fifo_segment_flags(_fs)   _fs->h->flags
 

Typedefs

typedef enum fifo_segment_flags_ fifo_segment_flags_t
 

Enumerations

enum  fifo_segment_ftype_t { FIFO_SEGMENT_FTYPE_NONE = -1, FIFO_SEGMENT_RX_FIFO = 0, FIFO_SEGMENT_TX_FIFO, FIFO_SEGMENT_N_FTYPES }
 
enum  fifo_segment_flags_ { FIFO_SEGMENT_F_IS_PREALLOCATED = 1 << 0, FIFO_SEGMENT_F_WILL_DELETE = 1 << 1 }
 

Functions

int fifo_segment_init (fifo_segment_t *fs)
 Initialize fifo segment shared header. More...
 
int fifo_segment_create (fifo_segment_main_t *sm, fifo_segment_create_args_t *a)
 Create a fifo segment and initialize as master. More...
 
int fifo_segment_attach (fifo_segment_main_t *sm, fifo_segment_create_args_t *a)
 Attach as slave to a fifo segment. More...
 
void fifo_segment_delete (fifo_segment_main_t *sm, fifo_segment_t *fs)
 
fifo_segment_tfifo_segment_get_segment (fifo_segment_main_t *sm, u32 fs_index)
 
u32 fifo_segment_index (fifo_segment_main_t *sm, fifo_segment_t *fs)
 
void fifo_segment_info (fifo_segment_t *seg, char **address, size_t *size)
 
svm_fifo_tfifo_segment_alloc_fifo (fifo_segment_t *fs, u32 data_bytes, fifo_segment_ftype_t ftype)
 Allocate fifo in fifo segment. More...
 
void fifo_segment_free_fifo (fifo_segment_t *fs, svm_fifo_t *f)
 Free fifo allocated in fifo segment. More...
 
int fifo_segment_prealloc_fifo_hdrs (fifo_segment_t *fs, u32 batch_size)
 Try to preallocate fifo headers. More...
 
int fifo_segment_prealloc_fifo_chunks (fifo_segment_t *fs, u32 chunk_size, u32 batch_size)
 Try to preallocate fifo chunks on segment. More...
 
void fifo_segment_preallocate_fifo_pairs (fifo_segment_t *fs, u32 rx_fifo_size, u32 tx_fifo_size, u32 *n_fifo_pairs)
 Pre-allocates fifo pairs in fifo segment. More...
 
int fifo_segment_grow_fifo (fifo_segment_t *fs, svm_fifo_t *f, u32 chunk_size)
 Grow fifo size by adding an additional chunk of memory. More...
 
int fifo_segment_collect_fifo_chunks (fifo_segment_t *fs, svm_fifo_t *f)
 Collect unused chunks for fifo. More...
 
u32 fifo_segment_free_bytes (fifo_segment_t *fs)
 Fifo segment estimate of number of free bytes. More...
 
void fifo_segment_update_free_bytes (fifo_segment_t *fs)
 Update fifo segment free bytes estimate. More...
 
u32 fifo_segment_fl_chunk_bytes (fifo_segment_t *fs)
 Number of bytes on chunk free lists. More...
 
u8 fifo_segment_has_fifos (fifo_segment_t *fs)
 
svm_fifo_tfifo_segment_get_fifo_list (fifo_segment_t *fs)
 
u32 fifo_segment_num_fifos (fifo_segment_t *fs)
 Get number of active fifos. More...
 
u32 fifo_segment_num_free_fifos (fifo_segment_t *fs)
 
u32 fifo_segment_num_free_chunks (fifo_segment_t *fs, u32 size)
 Find number of free chunks of given size. More...
 
void fifo_segment_main_init (fifo_segment_main_t *sm, u64 baseva, u32 timeout_in_seconds)
 

Variables

format_function_t format_fifo_segment
 
format_function_t format_fifo_segment_type
 

Macro Definition Documentation

#define FIFO_SEGMENT_ALLOC_BATCH_SIZE   32 /* Allocation quantum */

Definition at line 31 of file fifo_segment.h.

#define fifo_segment_flags (   _fs)    _fs->h->flags

Definition at line 72 of file fifo_segment.h.

#define FIFO_SEGMENT_MAX_FIFO_SIZE   (2 << 30) /* 2GB max fifo size */

Definition at line 30 of file fifo_segment.h.

#define FIFO_SEGMENT_MIN_FIFO_SIZE   4096 /* 4kB min fifo size */

Definition at line 29 of file fifo_segment.h.

Typedef Documentation

Enumeration Type Documentation

Enumerator
FIFO_SEGMENT_F_IS_PREALLOCATED 
FIFO_SEGMENT_F_WILL_DELETE 

Definition at line 33 of file fifo_segment.h.

Enumerator
FIFO_SEGMENT_FTYPE_NONE 
FIFO_SEGMENT_RX_FIFO 
FIFO_SEGMENT_TX_FIFO 
FIFO_SEGMENT_N_FTYPES 

Definition at line 21 of file fifo_segment.h.

Function Documentation

svm_fifo_t* fifo_segment_alloc_fifo ( fifo_segment_t fs,
u32  data_bytes,
fifo_segment_ftype_t  ftype 
)

Allocate fifo in fifo segment.

Parameters
fsfifo segment for fifo
data_bytessize of default fifo chunk in bytes
ftypefifo type fifo_segment_ftype_t
Returns
new fifo or 0 if alloc failed

Definition at line 375 of file fifo_segment.c.

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int fifo_segment_attach ( fifo_segment_main_t sm,
fifo_segment_create_args_t a 
)

Attach as slave to a fifo segment.

Definition at line 99 of file fifo_segment.c.

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int fifo_segment_collect_fifo_chunks ( fifo_segment_t fs,
svm_fifo_t f 
)

Collect unused chunks for fifo.

Parameters
fsfifo segment for fifo
ffifo whose chunks are to be collected
Returns
0 on success, error otherwise

Definition at line 688 of file fifo_segment.c.

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int fifo_segment_create ( fifo_segment_main_t sm,
fifo_segment_create_args_t a 
)

Create a fifo segment and initialize as master.

Definition at line 65 of file fifo_segment.c.

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void fifo_segment_delete ( fifo_segment_main_t sm,
fifo_segment_t fs 
)

Definition at line 129 of file fifo_segment.c.

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u32 fifo_segment_fl_chunk_bytes ( fifo_segment_t fs)

Number of bytes on chunk free lists.

Parameters
fsfifo segment
Returns
free bytes on chunk free lists

Definition at line 803 of file fifo_segment.c.

u32 fifo_segment_free_bytes ( fifo_segment_t fs)

Fifo segment estimate of number of free bytes.

Returns fifo segment's internal estimate of the number of free bytes. To force a synchronization between the segment and the underlying memory allocator, call fifo_segment_update_free_bytes

Parameters
fsfifo segment
Returns
free bytes estimate

Definition at line 797 of file fifo_segment.c.

void fifo_segment_free_fifo ( fifo_segment_t fs,
svm_fifo_t f 
)

Free fifo allocated in fifo segment.

Parameters
fsfifo segment for fifo
ffifo to be freed

Definition at line 430 of file fifo_segment.c.

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svm_fifo_t* fifo_segment_get_fifo_list ( fifo_segment_t fs)

Definition at line 815 of file fifo_segment.c.

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fifo_segment_t* fifo_segment_get_segment ( fifo_segment_main_t sm,
u32  fs_index 
)

Definition at line 149 of file fifo_segment.c.

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int fifo_segment_grow_fifo ( fifo_segment_t fs,
svm_fifo_t f,
u32  chunk_size 
)

Grow fifo size by adding an additional chunk of memory.

Parameters
fsfifo segment for fifo
ffifo to be grown
chunk_sizenumber of bytes to be added to fifo
Returns
0 on success or a negative number otherwise

Definition at line 640 of file fifo_segment.c.

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u8 fifo_segment_has_fifos ( fifo_segment_t fs)

Definition at line 809 of file fifo_segment.c.

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u32 fifo_segment_index ( fifo_segment_main_t sm,
fifo_segment_t fs 
)

Definition at line 137 of file fifo_segment.c.

void fifo_segment_info ( fifo_segment_t seg,
char **  address,
size_t *  size 
)

Definition at line 155 of file fifo_segment.c.

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int fifo_segment_init ( fifo_segment_t fs)

Initialize fifo segment shared header.

Definition at line 41 of file fifo_segment.c.

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void fifo_segment_main_init ( fifo_segment_main_t sm,
u64  baseva,
u32  timeout_in_seconds 
)

Definition at line 162 of file fifo_segment.c.

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u32 fifo_segment_num_fifos ( fifo_segment_t fs)

Get number of active fifos.

Definition at line 720 of file fifo_segment.c.

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u32 fifo_segment_num_free_chunks ( fifo_segment_t fs,
u32  size 
)

Find number of free chunks of given size.

Parameters
fsfifo segment
sizechunk size of interest or ~0 if all should be counted
Returns
number of chunks of given size

Definition at line 745 of file fifo_segment.c.

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u32 fifo_segment_num_free_fifos ( fifo_segment_t fs)

Definition at line 726 of file fifo_segment.c.

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int fifo_segment_prealloc_fifo_chunks ( fifo_segment_t fs,
u32  chunk_size,
u32  batch_size 
)

Try to preallocate fifo chunks on segment.

Tries to preallocate chunks of requested size on segment and adds them to chunk freelist.

Parameters
fsfifo segment
chunk_sizesize of chunks to be allocated in bytes
batch_sizenumber of chunks to be allocated
Returns
0 on success, negative number otherwise

Definition at line 537 of file fifo_segment.c.

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int fifo_segment_prealloc_fifo_hdrs ( fifo_segment_t fs,
u32  batch_size 
)

Try to preallocate fifo headers.

Tries to preallocate fifo headers and adds them to freelist.

Parameters
fsfifo segment
batch_sizenumber of chunks to be allocated
Returns
0 on success, negative number otherwise

Definition at line 500 of file fifo_segment.c.

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void fifo_segment_preallocate_fifo_pairs ( fifo_segment_t fs,
u32  rx_fifo_size,
u32  tx_fifo_size,
u32 n_fifo_pairs 
)

Pre-allocates fifo pairs in fifo segment.

The number of fifos pre-allocated is the minimum of the requested number of pairs and the maximum number that fit within the segment. If the maximum is hit, the number of fifo pairs requested is updated by subtracting the number of fifos that have been successfully allocated.

Parameters
fsfifo segment for fifo
rx_fifo_sizedata size of rx fifos
tx_fifo_sizedata size of tx fifos
n_fifo_pairsnumber of pairs requested. Prior to returning, this is decremented by the the number of pairs allocated.

Definition at line 589 of file fifo_segment.c.

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void fifo_segment_update_free_bytes ( fifo_segment_t fs)

Update fifo segment free bytes estimate.

Forces fifo segment free bytes estimate synchronization with underlying memory allocator.

Parameters
fsfifo segment

Definition at line 791 of file fifo_segment.c.

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Variable Documentation

format_function_t format_fifo_segment

Definition at line 212 of file fifo_segment.h.

format_function_t format_fifo_segment_type

Definition at line 213 of file fifo_segment.h.