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diff --git a/src/svm/svm_fifo_segment.h b/src/svm/svm_fifo_segment.h
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+++ b/src/svm/svm_fifo_segment.h
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+/*
+ * Copyright (c) 2016 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_fifo_segment_h__
+#define __included_ssvm_fifo_segment_h__
+
+#include <svm/svm_fifo.h>
+#include <svm/ssvm.h>
+#include <vppinfra/lock.h>
+
+typedef enum
+{
+  FIFO_SEGMENT_FREELIST_NONE = -1,
+  FIFO_SEGMENT_RX_FREELIST = 0,
+  FIFO_SEGMENT_TX_FREELIST,
+  FIFO_SEGMENT_N_FREELISTS
+} svm_fifo_segment_freelist_t;
+
+#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096
+#define FIFO_SEGMENT_MAX_FIFO_SIZE (8<<20)	/* 8mb max fifo size */
+#define FIFO_SEGMENT_ALLOC_CHUNK_SIZE 32	/* Allocation quantum */
+
+#define FIFO_SEGMENT_F_IS_PRIVATE 	1 << 0	/* Private segment */
+#define FIFO_SEGMENT_F_IS_MAIN_HEAP	1 << 1	/* Segment is main heap */
+#define FIFO_SEGMENT_F_IS_PREALLOCATED	1 << 2	/* Segment is preallocated */
+
+typedef struct
+{
+  svm_fifo_t *fifos;		/**< Linked list of active RX fifos */
+  u8 *segment_name;		/**< Segment name */
+  svm_fifo_t **free_fifos;	/**< Freelists, by fifo size  */
+  u32 n_active_fifos;		/**< Number of active fifos */
+  u8 flags;			/**< Segment flags */
+} svm_fifo_segment_header_t;
+
+typedef struct
+{
+  ssvm_private_t ssvm;
+  svm_fifo_segment_header_t *h;
+} svm_fifo_segment_private_t;
+
+typedef struct
+{
+  volatile u32 lock;
+
+  /** pool of segments */
+  svm_fifo_segment_private_t *segments;
+  /* Where to put the next one */
+  u64 next_baseva;
+  u32 timeout_in_seconds;
+} svm_fifo_segment_main_t;
+
+extern svm_fifo_segment_main_t svm_fifo_segment_main;
+
+typedef struct
+{
+  char *segment_name;
+  u32 segment_size;
+  u32 *new_segment_indices;
+  u32 rx_fifo_size;
+  u32 tx_fifo_size;
+  u32 preallocated_fifo_pairs;
+  u32 private_segment_count;
+  u32 private_segment_size;
+} svm_fifo_segment_create_args_t;
+
+static inline svm_fifo_segment_private_t *
+svm_fifo_segment_get_segment (u32 segment_index)
+{
+  svm_fifo_segment_main_t *ssm = &svm_fifo_segment_main;
+  return vec_elt_at_index (ssm->segments, segment_index);
+}
+
+static inline u8
+svm_fifo_segment_has_fifos (svm_fifo_segment_private_t * fifo_segment)
+{
+  return fifo_segment->h->fifos != 0;
+}
+
+static inline svm_fifo_t *
+svm_fifo_segment_get_fifo_list (svm_fifo_segment_private_t * fifo_segment)
+{
+  return fifo_segment->h->fifos;
+}
+
+#define foreach_ssvm_fifo_segment_api_error             \
+_(OUT_OF_SPACE, "Out of space in segment", -200)
+
+typedef enum
+{
+#define _(n,s,c) SSVM_FIFO_SEGMENT_API_ERROR_##n = c,
+  foreach_ssvm_fifo_segment_api_error
+#undef _
+} ssvm_fifo_segment_api_error_enum_t;
+
+int svm_fifo_segment_create (svm_fifo_segment_create_args_t * a);
+int svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t
+					     * a);
+int svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a);
+void svm_fifo_segment_delete (svm_fifo_segment_private_t * s);
+
+svm_fifo_t *svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
+					 u32 data_size_in_bytes,
+					 svm_fifo_segment_freelist_t index);
+void svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s,
+				 svm_fifo_t * f,
+				 svm_fifo_segment_freelist_t index);
+void svm_fifo_segment_init (u64 baseva, u32 timeout_in_seconds);
+u32 svm_fifo_segment_index (svm_fifo_segment_private_t * s);
+u32 svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment);
+u32 svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t *
+				     fifo_segment, u32 fifo_size_in_bytes);
+
+svm_fifo_segment_private_t *svm_fifo_segment_segments_pool (void);
+format_function_t format_svm_fifo_segment;
+
+#endif /* __included_ssvm_fifo_segment_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */