Remove low-level stats getters from public API.

Since stats builder is implemented for retrieving cache, core and ioclass stats,
adapters should use it instead.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>

src/ocf_stats_priv.h

@@ -23,6 +23,132 @@ struct ocf_counters_req {
 	env_atomic64 pass_through;
 };
 
+/**
+ * @brief OCF requests statistics like hit, miss, etc...
+ *
+ * @note To calculate number of hits request do:
+ * total - (partial_miss + full_miss)
+ */
+struct ocf_stats_req {
+	/** Number of partial misses */
+	uint64_t partial_miss;
+
+	/** Number of full misses */
+	uint64_t full_miss;
+
+	/** Total of requests */
+	uint64_t total;
+
+	/** Pass-through requests */
+	uint64_t pass_through;
+};
+
+/**
+ * @brief OCF error statistics
+ */
+struct ocf_stats_error {
+	/** Read errors */
+	uint32_t read;
+
+	/** Write errors */
+	uint32_t write;
+};
+
+/**
+ * @brief OCF block statistics in bytes
+ */
+struct ocf_stats_block {
+	/** Number of blocks read */
+	uint64_t read;
+
+	/** Number of blocks written */
+	uint64_t write;
+};
+
+/**
+ * Statistics appropriate for given IO class
+ */
+struct ocf_stats_io_class {
+	/** Number of cache lines available for given partition */
+	uint64_t free_clines;
+
+	/** Number of cache lines within lru list */
+	uint64_t occupancy_clines;
+
+	/** Number of dirty cache lines assigned to specific partition */
+	uint64_t dirty_clines;
+
+	/** Read requests statistics */
+	struct ocf_stats_req read_reqs;
+
+	/** Writes requests statistics */
+	struct ocf_stats_req write_reqs;
+
+	/** Block requests for ocf volume statistics */
+	struct ocf_stats_block blocks;
+
+	/** Block requests for cache volume statistics */
+	struct ocf_stats_block cache_blocks;
+
+	/** Block requests for core volume statistics */
+	struct ocf_stats_block core_blocks;
+};
+
+#define IO_PACKET_NO 12
+#define IO_ALIGN_NO 4
+
+/**
+ * @brief Core debug statistics
+ */
+struct ocf_stats_core_debug {
+	/** I/O sizes being read (grouped by packets) */
+	uint64_t read_size[IO_PACKET_NO];
+
+	/** I/O sizes being written (grouped by packets) */
+	uint64_t write_size[IO_PACKET_NO];
+
+	/** I/O alignment for reads */
+	uint64_t read_align[IO_ALIGN_NO];
+
+	/** I/O alignment for writes */
+	uint64_t write_align[IO_ALIGN_NO];
+};
+
+/**
+ * @brief OCF core statistics
+ */
+struct ocf_stats_core {
+	/** Number of cache lines allocated in the cache for this core */
+	uint32_t cache_occupancy;
+
+	/** Number of dirty cache lines allocated in the cache for this core */
+	uint32_t dirty;
+
+	/** Read requests statistics */
+	struct ocf_stats_req read_reqs;
+
+	/** Write requests statistics */
+	struct ocf_stats_req write_reqs;
+
+	/** Block requests for cache volume statistics */
+	struct ocf_stats_block cache_volume;
+
+	/** Block requests for core volume statistics */
+	struct ocf_stats_block core_volume;
+
+	/** Block requests submitted by user to this core */
+	struct ocf_stats_block core;
+
+	/** Cache volume error statistics */
+	struct ocf_stats_error cache_errors;
+
+	/** Core volume error statistics */
+	struct ocf_stats_error core_errors;
+
+	/** Debug statistics */
+	struct ocf_stats_core_debug debug_stat;
+};
+
 /**
  * statistics appropriate for given io class.
  */
@@ -56,4 +182,45 @@ struct ocf_counters_core {
 #endif
 };
 
+/**
+ * @brief ocf_core_io_class_get_stats retrieve io class statistics
+ *			for given core
+ *
+ * Retrieve buffer of cache statistics for given cache instance.
+ *
+ * @param[in] core core handle to which request pertains
+ * @param[in] part_id IO class, stats of which are requested
+ * @param[out] stats statistic structure that shall be filled as
+ *             a result of this function invocation.
+ *
+ * @result zero upon successful completion; error code otherwise
+ */
+int ocf_core_io_class_get_stats(ocf_core_t core, ocf_part_id_t part_id,
+		struct ocf_stats_io_class *stats);
+
+/**
+ * @brief retrieve core stats
+ *
+ * Retrieve ocf per core stats (for all IO classes together)
+ *
+ * @param[in] core core ID to which request pertains
+ * @param[out] stats statistics structure that shall be filled as
+ *             a result of this function invocation.
+ *
+ * @result zero upon successful completion; error code otherwise
+ */
+int ocf_core_get_stats(ocf_core_t core, struct ocf_stats_core *stats);
+
+/**
+ * @brief update DEBUG stats given IO request
+ *
+ * Function meant to update DEBUG stats for IO request.
+ *
+ * @note This function shall be invoked for each IO request processed
+ *
+ * @param[in] core to which request pertains
+ * @param[in] io request for which stats are being updated
+ */
+void ocf_core_update_stats(ocf_core_t core, struct ocf_io *io);
+
 #endif