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/*
*------------------------------------------------------------------
* Copyright (c) 2018 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_VLIBMEMORY_MEMORY_SHARED_H_
#define SRC_VLIBMEMORY_MEMORY_SHARED_H_
#include <vlibapi/api_common.h>
#include <vppinfra/error.h>
/* Allocated in shared memory */
/*
* Ring-allocation scheme for client API messages
*
* Only one proc/thread has control of a given message buffer.
* To free a buffer allocated from one of these rings, we clear
* a field in the buffer (header), and leave.
*
* No locks, no hits, no errors...
*/
typedef struct ring_alloc_
{
svm_queue_t *rp;
u16 size;
u16 nitems;
u32 hits;
u32 misses;
} ring_alloc_t;
typedef enum
{
VL_API_VLIB_RING,
VL_API_CLIENT_RING,
VL_API_QUEUE
} vl_api_shm_config_type_t;
typedef struct vl_api_shm_elem_config_
{
u8 type;
u8 _pad;
u16 count;
u32 size;
} vl_api_shm_elem_config_t;
STATIC_ASSERT (sizeof (vl_api_shm_elem_config_t) == 8,
"Size must be exactly 8 bytes");
/*
* Initializers for the (shared-memory) rings
* _(size, n). Note: each msg has space for a header.
*/
#define foreach_vl_aring_size \
_(64+sizeof(ring_alloc_t), 1024) \
_(256+sizeof(ring_alloc_t), 128) \
_(1024+sizeof(ring_alloc_t), 64)
#define foreach_clnt_aring_size \
_(1024+sizeof(ring_alloc_t), 1024) \
_(2048+sizeof(ring_alloc_t), 128) \
_(4096+sizeof(ring_alloc_t), 8)
typedef struct vl_shmem_hdr_
{
int version;
/* getpid () for the VLIB client process */
volatile int vl_pid;
/* Client sends VLIB msgs here. */
svm_queue_t *vl_input_queue;
/* Vector of rings; one for each size. */
/* VLIB allocates buffers to send msgs to clients here. */
ring_alloc_t *vl_rings;
/* Clients allocate buffer to send msgs to VLIB here. */
ring_alloc_t *client_rings;
/* Number of detected application restarts */
u32 application_restarts;
/* Number of messages reclaimed during application restart */
u32 restart_reclaims;
/* Number of garbage-collected messages */
u32 garbage_collects;
} vl_shmem_hdr_t;
#define VL_SHM_VERSION 2
#define VL_API_EPOCH_MASK 0xFF
#define VL_API_EPOCH_SHIFT 8
void *vl_msg_api_alloc (int nbytes);
void *vl_msg_api_alloc_or_null (int nbytes);
void *vl_msg_api_alloc_as_if_client (int nbytes);
void *vl_msg_api_alloc_as_if_client_or_null (int nbytes);
void vl_msg_api_free (void *a);
int vl_map_shmem (const char *region_name, int is_vlib);
void vl_unmap_shmem (void);
void vl_register_mapped_shmem_region (svm_region_t * rp);
void vl_msg_api_send_shmem (svm_queue_t * q, u8 * elem);
void vl_msg_api_send_shmem_nolock (svm_queue_t * q, u8 * elem);
void vl_set_memory_region_name (const char *name);
void vl_set_memory_root_path (const char *root_path);
void vl_set_memory_uid (int uid);
void vl_set_memory_gid (int gid);
void vl_set_global_memory_baseva (u64 baseva);
void vl_set_global_memory_size (u64 size);
void vl_set_api_memory_size (u64 size);
void vl_set_global_pvt_heap_size (u64 size);
void vl_set_api_pvt_heap_size (u64 size);
void vl_init_shmem (svm_region_t * vlib_rp, vl_api_shm_elem_config_t * config,
int is_vlib, int is_private_region);
#endif /* SRC_VLIBMEMORY_MEMORY_SHARED_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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