cb9cadad57
Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17 Signed-off-by: Ed Warnicke <eaw@cisco.com>
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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* Copyright (c) 2015 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __included_ssvm_h__
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#define __included_ssvm_h__
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <signal.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <time.h>
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#include <fcntl.h>
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#include <string.h>
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#include <vppinfra/clib.h>
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#include <vppinfra/vec.h>
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#include <vppinfra/hash.h>
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#include <vppinfra/bitmap.h>
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#include <vppinfra/fifo.h>
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#include <vppinfra/time.h>
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#include <vppinfra/mheap.h>
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#include <vppinfra/heap.h>
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#include <vppinfra/pool.h>
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#include <vppinfra/format.h>
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#define MMAP_PAGESIZE (4<<10)
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#define SSVM_N_OPAQUE 7
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typedef struct {
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/* Spin-lock */
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volatile u32 lock;
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volatile u32 owner_pid;
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int recursion_count;
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u32 tag; /* for debugging */
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/* The allocation arena */
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void * heap;
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/* Segment must be mapped at this address, or no supper */
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u64 ssvm_va;
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/* The actual mmap size */
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u64 ssvm_size;
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u32 master_pid;
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u32 slave_pid;
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u8 * name;
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void * opaque [SSVM_N_OPAQUE];
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/* Set when the master application thinks it's time to make the donuts */
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volatile u32 ready;
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/* Needed to make unique MAC addresses, etc. */
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u32 master_index;
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} ssvm_shared_header_t;
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typedef struct {
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ssvm_shared_header_t * sh;
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u64 ssvm_size;
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u32 my_pid;
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u32 vlib_hw_if_index;
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u8 * name;
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u64 requested_va;
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int i_am_master;
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u32 per_interface_next_index;
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u32 * rx_queue;
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} ssvm_private_t;
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always_inline void ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag)
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{
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if (h->owner_pid == my_pid)
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{
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h->recursion_count++;
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return;
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}
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while (__sync_lock_test_and_set (&h->lock, 1))
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;
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h->owner_pid = my_pid;
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h->recursion_count = 1;
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h->tag = tag;
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}
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always_inline void ssvm_unlock (ssvm_shared_header_t * h)
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{
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if (--h->recursion_count == 0)
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{
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h->owner_pid = 0;
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h->tag = 0;
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CLIB_MEMORY_BARRIER();
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h->lock = 0;
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}
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}
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static inline void *ssvm_push_heap (ssvm_shared_header_t *sh)
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{
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u8 *oldheap;
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oldheap = clib_mem_set_heap(sh->heap);
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return ((void *) oldheap);
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}
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static inline void ssvm_pop_heap (void *oldheap)
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{
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clib_mem_set_heap(oldheap);
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}
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#define foreach_ssvm_api_error \
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_(NO_NAME, "No shared segment name", -10) \
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_(NO_SIZE, "Size not set (master)", -11) \
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_(CREATE_FAILURE, "Create failed", -12) \
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_(SET_SIZE, "Set size failed", -13) \
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_(MMAP, "mmap failed", -14) \
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_(SLAVE_TIMEOUT, "Slave map timeout", -15)
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typedef enum {
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#define _(n,s,c) SSVM_API_ERROR_##n = c,
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foreach_ssvm_api_error
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#undef _
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} ssvm_api_error_enum_t;
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#define SSVM_API_ERROR_NO_NAME (-10)
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int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index);
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int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds);
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#endif /* __included_ssvm_h__ */
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