ikev2: add retry logic for session initiation

[vpp.git] / src / svm / fifo_segment.h

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index bb4f408..02d45d3 100644 (file)
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -26,35 +26,49 @@ typedef enum
   FIFO_SEGMENT_N_FTYPES
 } fifo_segment_ftype_t;
 
-#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096        /* 4kB min fifo size */
-#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30)   /* 2GB max fifo size */
+#define FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE 12     /**< 4kB min fifo size */
+#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096                /**< 4kB min fifo size */
+#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30)   /**< 2GB max fifo size */
 #define FIFO_SEGMENT_ALLOC_BATCH_SIZE 32       /* Allocation quantum */
 
 typedef enum fifo_segment_flags_
 {
   FIFO_SEGMENT_F_IS_PREALLOCATED = 1 << 0,
   FIFO_SEGMENT_F_WILL_DELETE = 1 << 1,
+  FIFO_SEGMENT_F_MEM_LIMIT = 1 << 2,
 } fifo_segment_flags_t;
 
-typedef struct
+typedef struct fifo_segment_slice_
 {
   svm_fifo_t *fifos;                   /**< Linked list of active RX fifos */
-  svm_fifo_t **free_fifos;             /**< Freelists by fifo size  */
+  svm_fifo_t *free_fifos;              /**< Freelists by fifo size  */
   svm_fifo_chunk_t **free_chunks;      /**< Freelists by chunk size */
+  uword n_fl_chunk_bytes;              /**< Chunk bytes on freelist */
+} fifo_segment_slice_t;
+
+typedef struct
+{
+  fifo_segment_slice_t *slices;                /** Fixed array of slices */
+  ssvm_shared_header_t *ssvm_sh;       /**< Pointer to fs ssvm shared hdr */
+  uword n_free_bytes;                  /**< Segment free bytes */
   u32 n_active_fifos;                  /**< Number of active fifos */
+  u32 n_reserved_bytes;                        /**< Bytes not to be allocated */
+  u32 max_log2_chunk_size;             /**< Max log2(chunk size) for fs */
   u8 flags;                            /**< Segment flags */
+  u8 n_slices;                         /**< Number of slices */
 } fifo_segment_header_t;
 
 typedef struct
 {
   ssvm_private_t ssvm;         /**< ssvm segment data */
   fifo_segment_header_t *h;    /**< fifo segment data */
+  u8 n_slices;                 /**< number of fifo segment slices */
 } fifo_segment_t;
 
 typedef struct
 {
   fifo_segment_t *segments;    /**< pool of fifo segments */
-  u64 next_baseva;             /**< Where to put the next one */
+  uword next_baseva;           /**< Where to put the next one */
   u32 timeout_in_seconds;      /**< Time to wait during attach */
 } fifo_segment_main_t;
 
@@ -88,9 +102,10 @@ void fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size);
  * @param ftype                fifo type @ref fifo_segment_ftype_t
  * @return             new fifo or 0 if alloc failed
  */
-svm_fifo_t *fifo_segment_alloc_fifo (fifo_segment_t * fs,
-                                    u32 data_bytes,
-                                    fifo_segment_ftype_t ftype);
+svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
+                                            u32 slice_index,
+                                            u32 data_bytes,
+                                            fifo_segment_ftype_t ftype);
 
 /**
  * Free fifo allocated in fifo segment
@@ -100,6 +115,31 @@ svm_fifo_t *fifo_segment_alloc_fifo (fifo_segment_t * fs,
  */
 void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f);
 
+/**
+ * Try to preallocate fifo headers
+ *
+ * Tries to preallocate fifo headers and adds them to freelist.
+ *
+ * @param fs           fifo segment
+ * @param batch_size   number of chunks to be allocated
+ * @return             0 on success, negative number otherwise
+ */
+int fifo_segment_prealloc_fifo_hdrs (fifo_segment_t * fs, u32 slice_index,
+                                    u32 batch_size);
+
+/**
+ * Try to preallocate fifo chunks on segment
+ *
+ * Tries to preallocate chunks of requested size on segment and adds them
+ * to chunk freelist.
+ *
+ * @param fs           fifo segment
+ * @param chunk_size   size of chunks to be allocated in bytes
+ * @param batch_size   number of chunks to be allocated
+ * @return             0 on success, negative number otherwise
+ */
+int fifo_segment_prealloc_fifo_chunks (fifo_segment_t * fs, u32 slice_index,
+                                      u32 chunk_size, u32 batch_size);
 /**
  * Pre-allocates fifo pairs in fifo segment
  *
@@ -137,10 +177,41 @@ int fifo_segment_grow_fifo (fifo_segment_t * fs, svm_fifo_t * f,
  * @return             0 on success, error otherwise
  */
 int fifo_segment_collect_fifo_chunks (fifo_segment_t * fs, svm_fifo_t * f);
+
+/**
+ * Fifo segment estimate of number of free bytes
+ *
+ * Returns fifo segment's internal estimate of the number of free bytes.
+ * To force a synchronization between the segment and the underlying
+ * memory allocator, call @ref fifo_segment_update_free_bytes
+ *
+ * @param fs           fifo segment
+ * @return             free bytes estimate
+ */
+uword fifo_segment_free_bytes (fifo_segment_t * fs);
+
+/**
+ * Update fifo segment free bytes estimate
+ *
+ * Forces fifo segment free bytes estimate synchronization with underlying
+ * memory allocator.
+ *
+ * @param fs           fifo segment
+ */
+void fifo_segment_update_free_bytes (fifo_segment_t * fs);
+
+/**
+ * Number of bytes on chunk free lists
+ *
+ * @param fs           fifo segment
+ * @return             free bytes on chunk free lists
+ */
+uword fifo_segment_fl_chunk_bytes (fifo_segment_t * fs);
 u8 fifo_segment_has_fifos (fifo_segment_t * fs);
-svm_fifo_t *fifo_segment_get_fifo_list (fifo_segment_t * fs);
+svm_fifo_t *fifo_segment_get_slice_fifo_list (fifo_segment_t * fs,
+                                             u32 slice_index);
 u32 fifo_segment_num_fifos (fifo_segment_t * fs);
-u32 fifo_segment_num_free_fifos (fifo_segment_t * fs, u32 fifo_size_in_bytes);
+u32 fifo_segment_num_free_fifos (fifo_segment_t * fs);
 /**
  * Find number of free chunks of given size
  *