/* * 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; /** Flags */ u8 add_segment:1; /**< can add new segments */ u8 use_mq_eventfd:1; /**< use eventfds for mqs */ u8 reserved:6; /** 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, segment_manager_properties_t * props); 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: */