/* *------------------------------------------------------------------ * 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; u32 socket_id; 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; uword *socket_file_index_by_sock_id; /* map user socket id to pool idx */ /* 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; u32 socket_id; 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_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename); 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: */