typedef struct
{
- svm_fifo_t *fifos; /**< Linked list of active RX fifos */
- svm_fifo_t **free_fifos; /**< Freelists, by fifo size */
- u32 n_active_fifos; /**< Number of active fifos */
- u8 flags; /**< Segment flags */
+ svm_fifo_t *fifos; /**< Linked list of active RX fifos */
+ svm_fifo_t *free_fifos; /**< Freelists by fifo size */
+ svm_fifo_chunk_t **free_chunks; /**< Freelists by chunk size */
+ u32 n_active_fifos; /**< Number of active fifos */
+ u8 flags; /**< Segment flags */
+ u32 n_free_bytes; /**< Bytes usable for new allocs */
+ u32 n_fl_chunk_bytes; /**< Chunk bytes on freelist */
} fifo_segment_header_t;
typedef struct
/**
* Allocate fifo in fifo segment
*
- * @param fs fifo segment
+ * @param fs fifo segment for fifo
* @param data_bytes size of default fifo chunk in bytes
* @param ftype fifo type @ref fifo_segment_ftype_t
* @return new fifo or 0 if alloc failed
/**
* Free fifo allocated in fifo segment
*
- * @param fs fifo segment
+ * @param fs fifo segment for fifo
* @param f fifo to be freed
*/
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 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 chunk_size,
+ u32 batch_size);
/**
* Pre-allocates fifo pairs in fifo segment
*
* is hit, the number of fifo pairs requested is updated by subtracting the
* number of fifos that have been successfully allocated.
*
- * @param fs fifo segment
+ * @param fs fifo segment for fifo
* @param rx_fifo_size data size of rx fifos
* @param tx_fifo_size data size of tx fifos
* @param n_fifo_pairs number of pairs requested. Prior to returning, this
u32 rx_fifo_size,
u32 tx_fifo_size,
u32 * n_fifo_pairs);
+/**
+ * Grow fifo size by adding an additional chunk of memory
+ *
+ * @param fs fifo segment for fifo
+ * @param f fifo to be grown
+ * @param chunk_size number of bytes to be added to fifo
+ * @return 0 on success or a negative number otherwise
+ */
+int fifo_segment_grow_fifo (fifo_segment_t * fs, svm_fifo_t * f,
+ u32 chunk_size);
+
+/**
+ * Collect unused chunks for fifo
+ *
+ * @param fs fifo segment for fifo
+ * @param f fifo whose chunks are to be collected
+ * @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
+ */
+u32 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
+ */
+u32 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);
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
+ *
+ * @param fs fifo segment
+ * @param size chunk size of interest or ~0 if all should be counted
+ * @return number of chunks of given size
+ */
+u32 fifo_segment_num_free_chunks (fifo_segment_t * fs, u32 size);
void fifo_segment_main_init (fifo_segment_main_t * sm, u64 baseva,
u32 timeout_in_seconds);