Initial commit of vpp code.v1.0.0

Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17
Signed-off-by: Ed Warnicke <eaw@cisco.com>

1 files changed, 140 insertions, 0 deletions

diff --git a/svm/ssvm.h b/svm/ssvm.h
new file mode 100644
index 00000000000..51164931962
--- /dev/null
+++ b/svm/ssvm.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2015 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 __included_ssvm_h__
+#define __included_ssvm_h__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <signal.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <time.h>
+#include <fcntl.h>
+#include <string.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/bitmap.h>
+#include <vppinfra/fifo.h>
+#include <vppinfra/time.h>
+#include <vppinfra/mheap.h>
+#include <vppinfra/heap.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+
+#define MMAP_PAGESIZE (4<<10)
+#define SSVM_N_OPAQUE 7
+
+typedef struct {
+  /* Spin-lock */
+  volatile u32 lock;
+  volatile u32 owner_pid;
+  int recursion_count;
+  u32 tag;                      /* for debugging */
+
+  /* The allocation arena */
+  void * heap;
+
+  /* Segment must be mapped at this address, or no supper */
+  u64 ssvm_va;
+  /* The actual mmap size */
+  u64 ssvm_size;
+  u32 master_pid;
+  u32 slave_pid;
+  u8 * name;
+  void * opaque [SSVM_N_OPAQUE];
+
+  /* Set when the master application thinks it's time to make the donuts */
+  volatile u32 ready;
+
+  /* Needed to make unique MAC addresses, etc. */
+  u32 master_index;
+} ssvm_shared_header_t;
+
+typedef struct {
+  ssvm_shared_header_t * sh;
+  u64 ssvm_size;
+  u32 my_pid;
+  u32 vlib_hw_if_index;
+  u8 * name;
+  u64 requested_va;
+  int i_am_master;
+  u32 per_interface_next_index;
+  u32 * rx_queue;
+} ssvm_private_t;
+
+always_inline void ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag)
+{
+  if (h->owner_pid == my_pid)
+    {
+      h->recursion_count++;
+      return;
+    }
+  
+  while (__sync_lock_test_and_set (&h->lock, 1))
+    ;
+  
+  h->owner_pid = my_pid;
+  h->recursion_count = 1;
+  h->tag = tag;
+}
+
+always_inline void ssvm_unlock (ssvm_shared_header_t * h)
+{
+  if (--h->recursion_count == 0)
+    {
+      h->owner_pid = 0;
+      h->tag = 0;
+      CLIB_MEMORY_BARRIER();
+      h->lock = 0;
+    }
+}
+
+static inline void *ssvm_push_heap (ssvm_shared_header_t *sh)
+{
+    u8 *oldheap;
+    oldheap = clib_mem_set_heap(sh->heap);
+    return ((void *) oldheap);
+}
+
+static inline void ssvm_pop_heap (void *oldheap)
+{
+    clib_mem_set_heap(oldheap);
+}
+
+#define foreach_ssvm_api_error                  \
+_(NO_NAME, "No shared segment name", -10)       \
+_(NO_SIZE, "Size not set (master)", -11)        \
+_(CREATE_FAILURE, "Create failed", -12)		\
+_(SET_SIZE, "Set size failed", -13)		\
+_(MMAP, "mmap failed", -14)			\
+_(SLAVE_TIMEOUT, "Slave map timeout", -15)
+
+typedef enum {
+#define _(n,s,c) SSVM_API_ERROR_##n = c,
+  foreach_ssvm_api_error
+#undef _
+} ssvm_api_error_enum_t;
+
+#define SSVM_API_ERROR_NO_NAME	(-10)
+
+int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index);
+int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds);
+
+#endif /* __included_ssvm_h__ */