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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.
*------------------------------------------------------------------
*/
#include <vppinfra/lock.h>
#define MEMIF_DEFAULT_SOCKET_FILENAME "memif.sock"
#define MEMIF_DEFAULT_RING_SIZE 1024
#define MEMIF_DEFAULT_RX_QUEUES 1
#define MEMIF_DEFAULT_TX_QUEUES 1
#define MEMIF_DEFAULT_BUFFER_SIZE 2048
#define MEMIF_MAX_M2S_RING (vec_len (vlib_mains) - 1)
#define MEMIF_MAX_S2M_RING (vec_len (vlib_mains) - 1)
#define MEMIF_MAX_REGION 255
#define MEMIF_MAX_LOG2_RING_SIZE 14
#define MEMIF_DEBUG 0
#if MEMIF_DEBUG == 1
#define DBG(...) clib_warning(__VA_ARGS__)
#define DBG_UNIX_LOG(...) clib_unix_warning(__VA_ARGS__)
#else
#define DBG(...)
#define DBG_UNIX_LOG(...)
#endif
#if MEMIF_DEBUG == 1
#define memif_file_add(a, b) do { \
*a = clib_file_add (&file_main, b); \
clib_warning ("clib_file_add fd %d private_data %u idx %u", \
(b)->file_descriptor, (b)->private_data, *a); \
} while (0)
#define memif_file_del(a) do { \
clib_warning ("clib_file_del idx %u",a - file_main.file_pool); \
clib_file_del (&file_main, a); \
} while (0)
#define memif_file_del_by_index(a) do { \
clib_warning ("clib_file_del idx %u", a); \
clib_file_del_by_index (&file_main, a); \
} while (0)
#else
#define memif_file_add(a, b) do { \
*a = clib_file_add (&file_main, b); \
} while (0)
#define memif_file_del(a) clib_file_del(&file_main, a)
#define memif_file_del_by_index(a) clib_file_del_by_index(&file_main, a)
#endif
typedef struct
{
u8 *filename;
clib_socket_t *sock;
clib_socket_t **pending_clients;
int ref_cnt;
int is_listener;
/* hash of all registered id */
mhash_t dev_instance_by_id;
/* hash of all registered fds */
uword *dev_instance_by_fd;
} memif_socket_file_t;
typedef struct
{
void *shm;
memif_region_size_t region_size;
int fd;
} memif_region_t;
typedef struct
{
memif_msg_t msg;
int fd;
} memif_msg_fifo_elt_t;
typedef struct
{
/* ring data */
memif_ring_t *ring;
memif_log2_ring_size_t log2_ring_size;
memif_region_index_t region;
memif_region_offset_t offset;
u16 last_head;
u16 last_tail;
/* interrupts */
int int_fd;
uword int_clib_file_index;
u64 int_count;
/* queue type */
memif_ring_type_t type;
} memif_queue_t;
#define foreach_memif_if_flag \
_(0, ADMIN_UP, "admin-up") \
_(1, IS_SLAVE, "slave") \
_(2, CONNECTING, "connecting") \
_(3, CONNECTED, "connected") \
_(4, DELETING, "deleting")
typedef enum
{
#define _(a, b, c) MEMIF_IF_FLAG_##b = (1 << a),
foreach_memif_if_flag
#undef _
} memif_if_flag_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
clib_spinlock_t lockp;
u32 flags;
memif_interface_id_t id;
u32 hw_if_index;
u32 sw_if_index;
uword dev_instance;
memif_interface_mode_t mode:8;
u32 per_interface_next_index;
/* socket connection */
clib_socket_t *sock;
uword socket_file_index;
memif_msg_fifo_elt_t *msg_queue;
u8 *secret;
memif_region_t *regions;
memif_queue_t *rx_queues;
memif_queue_t *tx_queues;
/* remote info */
u8 *remote_name;
u8 *remote_if_name;
struct
{
memif_log2_ring_size_t log2_ring_size;
u8 num_s2m_rings;
u8 num_m2s_rings;
u16 buffer_size;
} cfg;
struct
{
memif_log2_ring_size_t log2_ring_size;
u8 num_s2m_rings;
u8 num_m2s_rings;
u16 buffer_size;
} run;
/* disconnect strings */
u8 *local_disc_string;
u8 *remote_disc_string;
} memif_if_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/** API message ID base */
u16 msg_id_base;
/* pool of all memory interfaces */
memif_if_t *interfaces;
/* pool of all unix socket files */
memif_socket_file_t *socket_files;
mhash_t socket_file_index_by_filename;
/* rx buffer cache */
u32 **rx_buffers;
} memif_main_t;
extern memif_main_t memif_main;
extern vnet_device_class_t memif_device_class;
extern vlib_node_registration_t memif_input_node;
enum
{
MEMIF_PROCESS_EVENT_START = 1,
MEMIF_PROCESS_EVENT_STOP = 2,
} memif_process_event_t;
typedef struct
{
memif_interface_id_t id;
u8 *socket_filename;
u8 *secret;
u8 is_master;
memif_interface_mode_t mode:8;
memif_log2_ring_size_t log2_ring_size;
u16 buffer_size;
u8 hw_addr_set;
u8 hw_addr[6];
u8 rx_queues;
u8 tx_queues;
/* return */
u32 sw_if_index;
} memif_create_if_args_t;
int memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args);
int memif_delete_if (vlib_main_t * vm, memif_if_t * mif);
clib_error_t *memif_plugin_api_hookup (vlib_main_t * vm);
static_always_inline void *
memif_get_buffer (memif_if_t * mif, memif_ring_t * ring, u16 slot)
{
u16 region = ring->desc[slot].region;
return mif->regions[region].shm + ring->desc[slot].offset;
}
/* memif.c */
clib_error_t *memif_init_regions_and_queues (memif_if_t * mif);
clib_error_t *memif_connect (memif_if_t * mif);
void memif_disconnect (memif_if_t * mif, clib_error_t * err);
/* socket.c */
void memif_socket_close (clib_socket_t ** sock);
clib_error_t *memif_conn_fd_accept_ready (clib_file_t * uf);
clib_error_t *memif_master_conn_fd_read_ready (clib_file_t * uf);
clib_error_t *memif_slave_conn_fd_read_ready (clib_file_t * uf);
clib_error_t *memif_master_conn_fd_write_ready (clib_file_t * uf);
clib_error_t *memif_slave_conn_fd_write_ready (clib_file_t * uf);
clib_error_t *memif_master_conn_fd_error (clib_file_t * uf);
clib_error_t *memif_slave_conn_fd_error (clib_file_t * uf);
clib_error_t *memif_msg_send_disconnect (memif_if_t * mif,
clib_error_t * err);
u8 *format_memif_device_name (u8 * s, va_list * args);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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