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/*
* Copyright (c) 2017 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 SRC_VNET_SESSION_SEGMENT_MANAGER_H_
#define SRC_VNET_SESSION_SEGMENT_MANAGER_H_
#include <vnet/vnet.h>
#include <svm/svm_fifo_segment.h>
#include <svm/message_queue.h>
#include <vlibmemory/api.h>
#include <vppinfra/lock.h>
#include <vppinfra/valloc.h>
typedef struct _segment_manager_properties
{
/** Session fifo sizes. */
u32 rx_fifo_size;
u32 tx_fifo_size;
u32 evt_q_size;
/** Configured additional segment size */
u32 add_segment_size;
/** Flag that indicates if additional segments should be created */
u8 add_segment;
/** Segment type: if set to SSVM_N_TYPES, private segments are used */
ssvm_segment_type_t segment_type;
} segment_manager_properties_t;
typedef struct _segment_manager
{
/** Pool of segments allocated by this manager */
svm_fifo_segment_private_t *segments;
/** rwlock that protects the segments pool */
clib_rwlock_t segments_rwlock;
/** Owner app index */
u32 app_index;
/**
* First segment should not be deleted unless segment manger is deleted.
* This also indicates that the segment manager is the first to have been
* allocated for the app.
*/
u8 first_is_protected;
/**
* App event queue allocated in first segment
*/
svm_msg_q_t *event_queue;
} segment_manager_t;
#define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \
do { \
clib_rwlock_reader_lock (&(SM)->segments_rwlock); \
pool_foreach((VAR), ((SM)->segments), (BODY)); \
clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \
} while (0)
typedef struct segment_manager_main_
{
/** Pool of segment managers */
segment_manager_t *segment_managers;
/** Virtual address allocator */
clib_valloc_main_t va_allocator;
} segment_manager_main_t;
extern segment_manager_main_t segment_manager_main;
typedef struct segment_manager_main_init_args_
{
u64 baseva;
u64 size;
} segment_manager_main_init_args_t;
#define SEGMENT_MANAGER_INVALID_APP_INDEX ((u32) ~0)
/** Pool of segment managers */
extern segment_manager_t *segment_managers;
always_inline segment_manager_t *
segment_manager_get (u32 index)
{
return pool_elt_at_index (segment_manager_main.segment_managers, index);
}
always_inline segment_manager_t *
segment_manager_get_if_valid (u32 index)
{
if (pool_is_free_index (segment_manager_main.segment_managers, index))
return 0;
return pool_elt_at_index (segment_manager_main.segment_managers, index);
}
always_inline u32
segment_manager_index (segment_manager_t * sm)
{
return sm - segment_manager_main.segment_managers;
}
always_inline svm_msg_q_t *
segment_manager_event_queue (segment_manager_t * sm)
{
return sm->event_queue;
}
segment_manager_t *segment_manager_new ();
int segment_manager_init (segment_manager_t * sm, u32 first_seg_size,
u32 prealloc_fifo_pairs);
svm_fifo_segment_private_t *segment_manager_get_segment (segment_manager_t *
sm,
u32 segment_index);
svm_fifo_segment_private_t
* segment_manager_get_segment_w_lock (segment_manager_t * sm,
u32 segment_index);
int segment_manager_add_segment (segment_manager_t * sm, u32 segment_size);
void segment_manager_del_segment (segment_manager_t * sm,
svm_fifo_segment_private_t * fs);
void segment_manager_segment_reader_unlock (segment_manager_t * sm);
void segment_manager_segment_writer_unlock (segment_manager_t * sm);
int segment_manager_add_first_segment (segment_manager_t * sm,
u32 segment_size);
void segment_manager_del_sessions (segment_manager_t * sm);
void segment_manager_del (segment_manager_t * sm);
void segment_manager_init_del (segment_manager_t * sm);
u8 segment_manager_has_fifos (segment_manager_t * sm);
int segment_manager_alloc_session_fifos (segment_manager_t * sm,
svm_fifo_t ** server_rx_fifo,
svm_fifo_t ** server_tx_fifo,
u32 * fifo_segment_index);
int segment_manager_try_alloc_fifos (svm_fifo_segment_private_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 (u32 segment_index, svm_fifo_t * rx_fifo,
svm_fifo_t * tx_fifo);
u32 segment_manager_evt_q_expected_size (u32 q_size);
svm_msg_q_t *segment_manager_alloc_queue (svm_fifo_segment_private_t * fs,
u32 queue_size);
void segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q);
void segment_manager_app_detach (segment_manager_t * sm);
void segment_manager_main_init (segment_manager_main_init_args_t * a);
segment_manager_properties_t
* segment_manager_properties_init (segment_manager_properties_t * sm);
#endif /* SRC_VNET_SESSION_SEGMENT_MANAGER_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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