/*
 * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
 * Copyright (c) 2002-2006 Mellanox Technologies LTD. All rights reserved.
 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
 * Copyright (c) 2009-2011 ZIH, TU Dresden, Federal Republic of Germany. All rights reserved.
 * Copyright (C) 2012-2017 Tokyo Institute of Technology. All rights reserved.
 * Copyright (c) 2019 Fabriscale Technologies AS. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

/*
 * Abstract:
 * 	Declaration of osm_opensm_t.
 *	This object represents the OpenSM super object.
 *	This object is part of the OpenSM family of objects.
 */

#ifndef _OSM_OPENSM_H_
#define _OSM_OPENSM_H_

#include <stdio.h>
#include <complib/cl_qlist.h>
#include <complib/cl_dispatcher.h>
#include <complib/cl_passivelock.h>
#include <complib/cl_atomic.h>
#include <complib/cl_nodenamemap.h>
#include <opensm/osm_console_io.h>
#include <opensm/osm_stats.h>
#include <opensm/osm_log.h>
#include <opensm/osm_sm.h>
#include <opensm/osm_sa.h>
#include <opensm/osm_perfmgr.h>
#include <opensm/osm_event_plugin.h>
#include <opensm/osm_db.h>
#include <opensm/osm_subnet.h>
#include <opensm/osm_mad_pool.h>
#include <opensm/osm_vl15intf.h>
#include <opensm/osm_congestion_control.h>

#ifdef __cplusplus
#  define BEGIN_C_DECLS extern "C" {
#  define END_C_DECLS   }
#else				/* !__cplusplus */
#  define BEGIN_C_DECLS
#  define END_C_DECLS
#endif				/* __cplusplus */

BEGIN_C_DECLS
/****h* OpenSM/OpenSM
* NAME
*	OpenSM
*
* DESCRIPTION
*	The OpenSM object encapsulates the information needed by the
*	OpenSM to govern itself.  The OpenSM is one OpenSM object.
*
*	The OpenSM object is thread safe.
*
*	This object should be treated as opaque and should
*	be manipulated only through the provided functions.
*
* AUTHOR
*	Steve King, Intel
*
*********/
/****d* OpenSM: OpenSM/osm_routing_engine_type_t
* NAME
*       osm_routing_engine_type_t
*
* DESCRIPTION
*       Enumerates the possible routing engines that
*       could be used to route a subnet.
*
* SYNOPSIS
*/
typedef enum _osm_routing_engine_type {
	OSM_ROUTING_ENGINE_TYPE_NONE = 0,
	OSM_ROUTING_ENGINE_TYPE_MINHOP,
	OSM_ROUTING_ENGINE_TYPE_UPDN,
	OSM_ROUTING_ENGINE_TYPE_DNUP,
	OSM_ROUTING_ENGINE_TYPE_FILE,
	OSM_ROUTING_ENGINE_TYPE_FTREE,
	OSM_ROUTING_ENGINE_TYPE_LASH,
	OSM_ROUTING_ENGINE_TYPE_DOR,
	OSM_ROUTING_ENGINE_TYPE_TORUS_2QOS,
	OSM_ROUTING_ENGINE_TYPE_NUE,
	OSM_ROUTING_ENGINE_TYPE_SSSP,
	OSM_ROUTING_ENGINE_TYPE_DFSSSP,
	OSM_ROUTING_ENGINE_TYPE_UNKNOWN,
	OSM_ROUTING_ENGINE_TYPE_EXTERNAL
} osm_routing_engine_type_t;
/***********/

/****s* OpenSM: OpenSM/osm_routing_engine
* NAME
*	struct osm_routing_engine
*
* DESCRIPTION
*	OpenSM routing engine module definition.
* NOTES
*	routing engine structure - multicast callbacks may be
*	added later.
*/
typedef struct osm_routing_engine {
	osm_routing_engine_type_t type;
	const char *name;
	void *context;
	int (*build_lid_matrices) (void *context);
	int (*ucast_build_fwd_tables) (void *context);
	void (*ucast_dump_tables) (void *context);
	void (*update_sl2vl)(void *context, IN osm_physp_t *port,
			     IN uint8_t in_port_num, IN uint8_t out_port_num,
			     IN OUT ib_slvl_table_t *t);
	void (*update_vlarb)(void *context, IN osm_physp_t *port,
			     IN uint8_t port_num,
			     IN OUT ib_vl_arb_table_t *block,
			     unsigned block_length, unsigned block_num);
	uint8_t (*path_sl)(void *context, IN uint8_t path_sl_hint,
			   IN const ib_net16_t slid, IN const ib_net16_t dlid);
	ib_api_status_t (*mcast_build_stree)(void *context,
					     IN OUT osm_mgrp_box_t *mgb);
	void (*destroy) (void *context);
	struct osm_routing_engine *next;
} osm_routing_engine_t;
/*
* FIELDS
*	name
*		The routing engine name (will be used in logs).
*
*	context
*		The routing engine context. Will be passed as parameter
*		to the callback functions.
*
*	build_lid_matrices
*		The callback for lid matrices generation.
*
*	ucast_build_fwd_tables
*		The callback for unicast forwarding table generation.
*
*	ucast_dump_tables
*		The callback for dumping unicast routing tables.
*
*	update_sl2vl(void *context, IN osm_physp_t *port,
*		     IN uint8_t in_port_num, IN uint8_t out_port_num,
*		     OUT ib_slvl_table_t *t)
*		The callback to allow routing engine input for SL2VL maps.
*		*port is the physical port for which the SL2VL map is to be
*		updated. For switches, in_port_num/out_port_num identify
*		which part of the SL2VL map to update.  For router/HCA ports,
*		in_port_num/out_port_num should be ignored.
*
*	update_vlarb(void *context, IN osm_physp_t *port,
*		     IN uint8_t port_num,
*		     IN OUT ib_vl_arb_table_t *block,
*		     unsigned block_length, unsigned block_num)
*		The callback to allow routing engine input for VLArbitration.
*		*port is the physical port for which the VLArb table is to be
*		updated.
*
*	path_sl
*		The callback for computing path SL.
*
*	mcast_build_stree
*		The callback for building the spanning tree for multicast
*		forwarding, called per MLID.
*
*	destroy
*		The destroy method, may be used for routing engine
*		internals cleanup.
*
*	next
*		Pointer to next routing engine in the list.
*/

/****s* OpenSM: OpenSM/external_routing_engine_module_t
 * NAME
 *	external_routing_engine_module_t
 *
 * DESCRIPTION
 *	External routing engine module structure.
 *
 *	This structure is used to register a new external routing engine
 *
 * SYNOPSIS
 */
typedef struct external_routing_engine_module {
	const char *name;
	int (*setup)(struct osm_routing_engine *re, struct osm_opensm *osm);
	void *context;
} external_routing_engine_module_t;
/*
 * FIELDS
 *	name
 *		Name of the external routing engine
 *
 *	setup
 *		function to setup the external routing engine's callbacks
 *
 *	context
 *		User defined context
 *
 *	SEE ALSO
 *		osm_register_external_routing_engine
 *********/

/****s* OpenSM: OpenSM/osm_opensm_t
* NAME
*	osm_opensm_t
*
* DESCRIPTION
*	OpenSM structure.
*
*	This object should be treated as opaque and should
*	be manipulated only through the provided functions.
*
* SYNOPSIS
*/
typedef struct osm_opensm {
	const char *osm_version;
	osm_subn_t subn;
	osm_sm_t sm;
	osm_sa_t sa;
#ifdef ENABLE_OSM_PERF_MGR
	osm_perfmgr_t perfmgr;
#endif				/* ENABLE_OSM_PERF_MGR */
	osm_congestion_control_t cc;
	cl_qlist_t plugin_list;
	osm_db_t db;
	boolean_t mad_pool_constructed;
	osm_mad_pool_t mad_pool;
	osm_vendor_t *p_vendor;
	boolean_t vl15_constructed;
	osm_vl15_t vl15;
	osm_log_t log;
	cl_dispatcher_t disp;
	cl_dispatcher_t sa_set_disp;
	boolean_t sa_set_disp_initialized;
	cl_plock_t lock;
	struct osm_routing_engine *routing_engine_list;
	struct osm_routing_engine *routing_engine_used;
	struct osm_routing_engine *default_routing_engine;
	boolean_t no_fallback_routing_engine;
	osm_stats_t stats;
	osm_console_t console;
	nn_map_t *node_name_map;
} osm_opensm_t;
/*
* FIELDS
* 	osm_version
* 		OpenSM version (as generated in osm_version.h)
*
*	subn
*		Subnet object for this subnet.
*
*	sm
*		The Subnet Manager (SM) object for this subnet.
*
*	sa
*		The Subnet Administration (SA) object for this subnet.
*
*	db
*		Persistant storage of some data required between sessions.
*
*	mad_pool
*		Pool of Management Datagram (MAD) objects.
*
*	p_vendor
*		Pointer to the Vendor specific adapter for various
*		transport interfaces, such as UMADT, AL, etc.  The
*		particular interface is set at compile time.
*
*	vl15
*		The VL15 interface.
*
*	log
*		Log facility used by all OpenSM components.
*
*	disp
*		Central dispatcher containing the OpenSM worker threads.
*
*	sa_set_disp
*		Dispatcher for SA Set and Delete requests.
*
*	sa_set_disp_initialized.
*		Indicator that sa_set_disp dispatcher was initialized.
*
*	lock
*		Shared lock guarding most OpenSM structures.
*
*	routing_engine_list
*		List of routing engines that should be tried for use.
*
*	routing_engine_used
*		Indicates which routing engine was used to route a subnet.
*
*	no_fallback_routing_engine
*		Indicates if default routing engine should not be used.
*
*	stats
*		Open SM statistics block
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_opensm_construct
* NAME
*	osm_opensm_construct
*
* DESCRIPTION
*	This function constructs an OpenSM object.
*
* SYNOPSIS
*/
void osm_opensm_construct(IN osm_opensm_t * p_osm);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to a OpenSM object to construct.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Allows calling osm_opensm_init, osm_opensm_destroy
*
*	Calling osm_opensm_construct is a prerequisite to calling any other
*	method except osm_opensm_init.
*
* SEE ALSO
*	SM object, osm_opensm_init, osm_opensm_destroy
*********/

/****f* OpenSM: OpenSM/osm_opensm_construct_finish
* NAME
*	osm_opensm_construct_finish
*
* DESCRIPTION
*	The osm_opensm_construct_finish function completes
*	the second phase of constucting an OpenSM object.
*
* SYNOPSIS
*/
void osm_opensm_construct_finish(IN osm_opensm_t * p_osm);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to a OpenSM object to construct.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Calling osm_opensm_construct/osm_construct_finish is a prerequisite
*	to calling any other method except osm_opensm_init/osm_opensm_init_finish.
*
* SEE ALSO
*	SM object, osm_opensm_init, osm_opensm_construct_finish,
*	osm_opensm_destroy, osm_opensm_destroy_finish
*********/

/****f* OpenSM: OpenSM/osm_opensm_destroy
* NAME
*	osm_opensm_destroy
*
* DESCRIPTION
*	The osm_opensm_destroy function destroys an SM, releasing
*	all resources.
*
* SYNOPSIS
*/
void osm_opensm_destroy(IN osm_opensm_t * p_osm);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to a OpenSM object to destroy.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Performs any necessary cleanup of the specified OpenSM object.
*	Further operations should not be attempted on the destroyed object.
*	This function should only be called after a call to osm_opensm_construct or
*	osm_opensm_init.
*
* SEE ALSO
*	SM object, osm_opensm_construct, osm_opensm_init
*********/

/****f* OpenSM: OpenSM/osm_opensm_destroy_finish
* NAME
*	osm_opensm_destroy_finish
*
* DESCRIPTION
*	The osm_opensm_destroy_finish function handles the second phase
*	of destroying an SM, releasing all resources.
*
* SYNOPSIS
*/
void osm_opensm_destroy_finish(IN osm_opensm_t * p_osm);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to a OpenSM object to destroy.
*
* RETURN VALUE
*	This function does not return a value.
*
* NOTES
*	Performs second phase of any necessary cleanup of the specified OpenSM object.
*	Further operations should not be attempted on the destroyed object.
*	This function should only be called after a call to
*	osm_opensm_construct_finish or osm_opensm_init_finish.
*
* SEE ALSO
*	SM object, osm_opensm_construct, osm_opensm_construct_finish,
*	osm_opensm_init, osm_opensm_init_finish
*********/

/****f* OpenSM: OpenSM/osm_opensm_init
* NAME
*	osm_opensm_init
*
* DESCRIPTION
*	The osm_opensm_init function initializes a OpenSM object for use.
*
* SYNOPSIS
*/
ib_api_status_t osm_opensm_init(IN osm_opensm_t * p_osm,
				IN const osm_subn_opt_t * p_opt);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object to initialize.
*
*	p_opt
*		[in] Pointer to the subnet options structure.
*
* RETURN VALUES
*	IB_SUCCESS if the OpenSM object was initialized successfully.
*
* NOTES
*	Allows calling other OpenSM methods.
*
* SEE ALSO
*	SM object, osm_opensm_construct, osm_opensm_destroy
*********/

/****f* OpenSM: OpenSM/osm_opensm_init_finish
* NAME
*	osm_opensm_init_finish
*
* DESCRIPTION
*	The osm_opensm_init_finish function performs the second phase
*	of initialization of an OpenSM object.
*
* SYNOPSIS
*/
ib_api_status_t osm_opensm_init_finish(IN osm_opensm_t * p_osm,
				       IN const osm_subn_opt_t * p_opt);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object to initialize.
*
*	p_opt
*		[in] Pointer to the subnet options structure.
*
* RETURN VALUES
*	IB_SUCCESS if the OpenSM object was initialized successfully.
*
* NOTES
*	Allows calling other OpenSM methods.
*
* SEE ALSO
*	SM object, osm_opensm_construct, osm_opensm_construct_finish,
*	osm_opensm_destroy, osm_opensm_destroy_finish
*********/

/****f* OpenSM: OpenSM/osm_opensm_sweep
* NAME
*	osm_opensm_sweep
*
* DESCRIPTION
*	Initiates a subnet sweep.
*
* SYNOPSIS
*/
static inline void osm_opensm_sweep(IN osm_opensm_t * p_osm)
{
	osm_sm_sweep(&p_osm->sm);
}

/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object on which to
*		initiate a sweep.
*
* RETURN VALUES
*	None
*
* NOTES
*	If the OpenSM object is not bound to a port, this function
*	does nothing.
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_opensm_set_log_flags
* NAME
*	osm_opensm_set_log_flags
*
* DESCRIPTION
*	Sets the log level.
*
* SYNOPSIS
*/
static inline void osm_opensm_set_log_flags(IN osm_opensm_t * p_osm,
					    IN osm_log_level_t log_flags)
{
	osm_log_set_level(&p_osm->log, log_flags);
}

/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object.
*
*	log_flags
*		[in] Log level flags to set.
*
* RETURN VALUES
*	None
*
* NOTES
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_opensm_bind
* NAME
*	osm_opensm_bind
*
* DESCRIPTION
*	Binds the opensm object to a port guid.
*
* SYNOPSIS
*/
ib_api_status_t osm_opensm_bind(IN osm_opensm_t * p_osm, IN ib_net64_t guid);
/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object to bind.
*
*	guid
*		[in] Local port GUID with which to bind.
*
* RETURN VALUES
*	None
*
* NOTES
*	A given opensm object can only be bound to one port at a time.
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_opensm_wait_for_subnet_up
* NAME
*	osm_opensm_wait_for_subnet_up
*
* DESCRIPTION
*	Blocks the calling thread until the subnet is up.
*
* SYNOPSIS
*/
static inline cl_status_t
osm_opensm_wait_for_subnet_up(IN osm_opensm_t * p_osm, IN uint32_t wait_us,
			      IN boolean_t interruptible)
{
	return osm_sm_wait_for_subnet_up(&p_osm->sm, wait_us, interruptible);
}

/*
* PARAMETERS
*	p_osm
*		[in] Pointer to an osm_opensm_t object.
*
*	wait_us
*		[in] Number of microseconds to wait.
*
*	interruptible
*		[in] Indicates whether the wait operation can be interrupted
*		by external signals.
*
* RETURN VALUES
*	CL_SUCCESS if the wait operation succeeded in response to the event
*	being set.
*
*	CL_TIMEOUT if the specified time period elapses.
*
*	CL_NOT_DONE if the wait was interrupted by an external signal.
*
*	CL_ERROR if the wait operation failed.
*
* NOTES
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_register_external_routing_engine
 * NAME
 *	osm_register_external_routing_engine
 *
 * DESCRIPTION
 *	Register a new external routing engine.
 *
 * SYNOPSIS
 */
cl_status_t osm_register_external_routing_engine(
	IN osm_opensm_t *osm,
	IN const external_routing_engine_module_t *module,
	IN void *context);
/*
 * PARAMETERS
 *	type
 *      [in] Pointer to a osm_opensm_t object
 *      [in] Pointer to a external_routing_engine_module_t object to be registered.
 *      [in] Pointer to a user context that will be set in osm_routing_engine_t
 *
 * RETURN VALUES
 *	CL_SUCCESS if the routing engine was registered successfully.
 *	CL_DUPLICATE if a routing engine with the same name
 *               or type was already registered.
 *
 * NOTES
 *
 * SEE ALSO
 *    external_routing_engine_module_t
 *********/

/****f* OpenSM: OpenSM/osm_routing_engine_type_str
* NAME
*	osm_routing_engine_type_str
*
* DESCRIPTION
*	Returns a string for the specified routing engine type.
*
* SYNOPSIS
*/
const char *osm_routing_engine_type_str(IN osm_routing_engine_type_t type);
/*
* PARAMETERS
*	type
*		[in] routing engine type.
*
* RETURN VALUES
*	Pointer to routing engine name.
*
* NOTES
*
* SEE ALSO
*********/

/****f* OpenSM: OpenSM/osm_routing_engine_type
* NAME
*	osm_routing_engine_type
*
* DESCRIPTION
*	Returns a routing engine type specified routing engine name string.
*
* SYNOPSIS
*/
osm_routing_engine_type_t osm_routing_engine_type(IN const char *str);
/*
* PARAMETERS
*	str
*		[in] routing engine name string.
*
* RETURN VALUES
*	Routing engine type.
*
* NOTES
*
* SEE ALSO
*********/

void osm_opensm_report_event(osm_opensm_t *osm, osm_epi_event_id_t event_id,
			     void *event_data);

/* dump helpers */
void osm_dump_mcast_routes(osm_opensm_t * osm);
void osm_dump_all(osm_opensm_t * osm);
void osm_dump_qmap_to_file(osm_opensm_t * p_osm, const char *file_name,
			   cl_qmap_t * map,
			   void (*func) (cl_map_item_t *, FILE *, void *),
			   void *cxt);

/****v* OpenSM/osm_exit_flag
*/
extern volatile unsigned int osm_exit_flag;
/*
* DESCRIPTION
*  Set to one to cause all threads to leave
*********/

END_C_DECLS
#endif				/* _OSM_OPENSM_H_ */