Spdk/include/spdk_internal/accel_engine.h

/*-
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 *
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 *       notice, this list of conditions and the following disclaimer.
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 *       from this software without specific prior written permission.
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#ifndef SPDK_INTERNAL_ACCEL_ENGINE_H
#define SPDK_INTERNAL_ACCEL_ENGINE_H

#include "spdk/stdinc.h"

#include "spdk/accel_engine.h"
#include "spdk/queue.h"

struct spdk_accel_task {
	spdk_accel_completion_cb	cb;
	uint8_t				offload_ctx[0];
};

struct spdk_accel_engine {
	uint64_t (*get_capabilities)(void);
	int (*copy)(void *cb_arg, struct spdk_io_channel *ch, void *dst, void *src,
		    uint64_t nbytes, spdk_accel_completion_cb cb);
	int (*dualcast)(void *cb_arg, struct spdk_io_channel *ch, void *dst1, void *dst2, void *src,
			uint64_t nbytes, spdk_accel_completion_cb cb);
	int (*compare)(void *cb_arg, struct spdk_io_channel *ch, void *src1, void *src2,
		       uint64_t nbytes, spdk_accel_completion_cb cb);
	int (*fill)(void *cb_arg, struct spdk_io_channel *ch, void *dst, uint8_t fill,
		    uint64_t nbytes, spdk_accel_completion_cb cb);
	int (*crc32c)(void *cb_arg, struct spdk_io_channel *ch, uint32_t *dst, void *src,
		      uint32_t seed, uint64_t nbytes, spdk_accel_completion_cb cb);
	struct spdk_io_channel *(*get_io_channel)(void);
};

struct spdk_accel_module_if {
	/** Initialization function for the module.  Called by the spdk
	 *   application during startup.
	 *
	 *  Modules are required to define this function.
	 */
	int	(*module_init)(void);

	/** Finish function for the module.  Called by the spdk application
	 *   before the spdk application exits to perform any necessary cleanup.
	 *
	 *  Modules are not required to define this function.
	 */
	void	(*module_fini)(void *ctx);

	/** Function called to return a text string representing the
	 *   module's configuration options for inclusion in an
	 *   spdk configuration file.
	 */
	void	(*config_text)(FILE *fp);

	/**
	 * Write Acceleration module configuration into provided JSON context.
	 */
	void	(*write_config_json)(struct spdk_json_write_ctx *w);

	/**
	 * Returns the allocation size required for the modules to use for context.
	 */
	size_t	(*get_ctx_size)(void);

	TAILQ_ENTRY(spdk_accel_module_if)	tailq;
};

void spdk_accel_hw_engine_register(struct spdk_accel_engine *accel_engine);
void spdk_accel_module_list_add(struct spdk_accel_module_if *accel_module);

#define SPDK_ACCEL_MODULE_REGISTER(init_fn, fini_fn, config_fn, config_json, ctx_size_fn)				\
	static struct spdk_accel_module_if init_fn ## _if = {						\
	.module_init		= init_fn,								\
	.module_fini		= fini_fn,								\
	.config_text		= config_fn,								\
	.write_config_json	= config_json,								\
	.get_ctx_size		= ctx_size_fn,								\
	};												\
	__attribute__((constructor)) static void init_fn ## _init(void)					\
	{												\
		spdk_accel_module_list_add(&init_fn ## _if);						\
	}

#endif