Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

modules/cas_cache/context.h

@@ -0,0 +1,79 @@
+/*
+* Copyright(c) 2012-2019 Intel Corporation
+* SPDX-License-Identifier: BSD-3-Clause-Clear
+*/
+
+
+#ifndef __CONTEXT_H__
+#define __CONTEXT_H__
+
+#include "linux_kernel_version.h"
+
+struct bio_vec_iter {
+	struct bio_vec *vec;
+	uint32_t vec_size;
+	uint32_t idx;
+	uint32_t offset;
+	uint32_t len;
+	struct bio_vec *ivec;
+};
+
+struct blk_data {
+	/**
+	 * @brief Atomic counter for core device
+	 */
+	atomic_t master_remaining;
+
+	/**
+	 * @brief Core device request context (core private info)
+	 */
+	void *master_io_req;
+
+	/**
+	 * @brief CAS IO with which data is associated
+	 */
+	struct ocf_io *io;
+
+	/**
+	 * @brief List item used for IO splitting
+	 */
+	struct list_head list;
+
+	/**
+	 * @brief Timestamp of start processing request
+	 */
+	unsigned long long start_time;
+
+	/**
+	 * @brief Request data siz
+	 */
+	uint32_t size;
+
+	/**
+	 * @brief This filed indicates an error for request
+	 */
+	int error;
+
+	/**
+	 * @brief Iterator for accessing data
+	 */
+	struct bio_vec_iter iter;
+
+	/**
+	 * @brief Request data
+	 */
+	struct bio_vec vec[];
+};
+
+struct blk_data *cas_alloc_blk_data(uint32_t size, gfp_t flags);
+void cas_free_blk_data(struct blk_data *data);
+
+ctx_data_t *cas_ctx_data_alloc(uint32_t pages);
+ctx_data_t *cas_ctx_data_zalloc(uint32_t pages);
+void cas_ctx_data_free(ctx_data_t *ctx_data);
+void cas_ctx_data_secure_erase(ctx_data_t *ctx_data);
+
+int cas_initialize_context(void);
+int cas_cleanup_context(void);
+
+#endif /* __CONTEXT_H__ */