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/*
* Copyright (c) 2016-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __included_ssvm_fifo_segment_h__
#define __included_ssvm_fifo_segment_h__
#include <svm/ssvm.h>
#include <svm/svm_fifo.h>
#include <vppinfra/lock.h>
typedef enum
{
FIFO_SEGMENT_FREELIST_NONE = -1,
FIFO_SEGMENT_RX_FREELIST = 0,
FIFO_SEGMENT_TX_FREELIST,
FIFO_SEGMENT_N_FREELISTS
} svm_fifo_segment_freelist_t;
#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096
#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30) /* 2GB max fifo size */
#define FIFO_SEGMENT_ALLOC_CHUNK_SIZE 32 /* Allocation quantum */
#define FIFO_SEGMENT_F_IS_PREALLOCATED (1 << 0)
#define FIFO_SEGMENT_F_WILL_DELETE (1 << 1)
typedef struct
{
svm_fifo_t *fifos; /**< Linked list of active RX fifos */
svm_fifo_t **free_fifos; /**< Freelists, by fifo size */
u32 n_active_fifos; /**< Number of active fifos */
u8 flags; /**< Segment flags */
} svm_fifo_segment_header_t;
typedef struct
{
ssvm_private_t ssvm;
svm_fifo_segment_header_t *h;
} svm_fifo_segment_private_t;
typedef struct
{
volatile u32 lock;
/** pool of segments */
svm_fifo_segment_private_t *segments;
/* Where to put the next one */
u64 next_baseva;
u32 timeout_in_seconds;
} svm_fifo_segment_main_t;
typedef struct
{
ssvm_segment_type_t segment_type;
char *segment_name;
u32 segment_size;
u32 *new_segment_indices;
int memfd_fd;
} svm_fifo_segment_create_args_t;
#define svm_fifo_segment_flags(_seg) _seg->h->flags
static inline svm_fifo_segment_private_t *
svm_fifo_segment_get_segment (svm_fifo_segment_main_t * sm, u32 segment_index)
{
return pool_elt_at_index (sm->segments, segment_index);
}
static inline u8
svm_fifo_segment_has_fifos (svm_fifo_segment_private_t * fifo_segment)
{
return fifo_segment->h->fifos != 0;
}
static inline svm_fifo_t *
svm_fifo_segment_get_fifo_list (svm_fifo_segment_private_t * fifo_segment)
{
return fifo_segment->h->fifos;
}
int svm_fifo_segment_init (svm_fifo_segment_private_t * s);
int svm_fifo_segment_create (svm_fifo_segment_main_t * sm,
svm_fifo_segment_create_args_t * a);
int svm_fifo_segment_create_process_private (svm_fifo_segment_main_t * sm,
svm_fifo_segment_create_args_t
*);
void svm_fifo_segment_preallocate_fifo_pairs (svm_fifo_segment_private_t * s,
u32 rx_fifo_size,
u32 tx_fifo_size,
u32 * n_fifo_pairs);
int svm_fifo_segment_attach (svm_fifo_segment_main_t * sm,
svm_fifo_segment_create_args_t * a);
void svm_fifo_segment_delete (svm_fifo_segment_main_t * sm,
svm_fifo_segment_private_t * s);
svm_fifo_t *svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
u32 data_size_in_bytes,
svm_fifo_segment_freelist_t index);
void svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s,
svm_fifo_t * f,
svm_fifo_segment_freelist_t index);
void svm_fifo_segment_main_init (svm_fifo_segment_main_t * sm, u64 baseva,
u32 timeout_in_seconds);
u32 svm_fifo_segment_index (svm_fifo_segment_main_t * sm,
svm_fifo_segment_private_t * s);
u32 svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment);
u32 svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t *
fifo_segment, u32 fifo_size_in_bytes);
void svm_fifo_segment_info (svm_fifo_segment_private_t * seg, char **address,
size_t * size);
svm_fifo_segment_private_t
* svm_fifo_segment_segments_pool (svm_fifo_segment_main_t * sm);
format_function_t format_svm_fifo_segment;
format_function_t format_svm_fifo_segment_type;
#endif /* __included_ssvm_fifo_segment_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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