/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2006 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2007      Cisco Systems, Inc.  All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 *
 */

#ifndef OPAL_PAFFINITY_BASE_H
#define OPAL_PAFFINITY_BASE_H

#include "opal_config.h"

#include "opal/mca/paffinity/paffinity.h"

/*
 * Global functions for MCA overall paffinity open and close
 */

BEGIN_C_DECLS

/**
 * Initialize the paffinity MCA framework
 *
 * @retval OPAL_SUCCESS Upon success
 * @retval OPAL_ERROR Upon failure
 *
 * This must be the first function invoked in the paffinity MCA
 * framework.  It initializes the paffinity MCA framework, finds
 * and opens paffinity components, etc.
 *
 * This function is invoked during opal_init().
 * 
 * This function fills in the internal global variable
 * opal_paffinity_base_components_opened, which is a list of all
 * paffinity components that were successfully opened.  This
 * variable should \em only be used by other paffinity base
 * functions -- it is not considered a public interface member --
 * and is only mentioned here for completeness.
 */
OPAL_DECLSPEC int opal_paffinity_base_open(void);

/**
 * Select an available component.
 *
 * @return OPAL_SUCCESS Upon success.
 * @return OPAL_NOT_FOUND If no component can be selected.
 * @return OPAL_ERROR Upon other failure.
 *
 * This function invokes the selection process for paffinity components,
 * which works as follows:
 *
 * - If the \em paffinity MCA parameter is not specified, the
 *   selection set is all available paffinity components.
 * - If the \em paffinity MCA parameter is specified, the
 *   selection set is just that component.
 * - All components in the selection set are queried to see if
 *   they want to run.  All components that want to run are ranked
 *   by their priority and the highest priority component is
 *   selected.  All non-selected components have their "close"
 *   function invoked to let them know that they were not selected.
 * - The selected component will have its "init" function invoked to
 *   let it know that it was selected.
 *
 * If we fall through this entire process and no component is
 * selected, then return OPAL_NOT_FOUND (this is not a fatal
 * error).
 *
 * At the end of this process, we'll either have a single
 * component that is selected and initialized, or no component was
 * selected.  If no component was selected, subsequent invocation
 * of the paffinity wrapper functions will return an error.
 */
OPAL_DECLSPEC int opal_paffinity_base_select(void);

/**
 * Set this process' affinity.
 *
 * @param cpumask PHYSICAL processor bitmask
 *
 * @retval OPAL_SUCCESS upon success
 * @retval OPAL_NOT_FOUND if no paffinity components are available.
 * @retval OPAL_ERROR upon other error.
 *
 * Set this process' affinity to the PHYSICAL CPU's specified in \em cpumask
 *
 * If no paffinity components were available, or if the
 * opal_paffinity_base_select() was never invoked, OPAL_NOT_FOUND
 * is returned.
 */
OPAL_DECLSPEC int opal_paffinity_base_set(opal_paffinity_base_cpu_set_t cpumask);

/**
 * Get this process' affinity.
 *
 * @param cpumask Pointer to PHYSICAL processor bitmask
 *
 * @retval OPAL_SUCCESS upon success
 * @retval OPAL_NOT_FOUND if no paffinity components are available.
 * @retval OPAL_ERROR upon other error.
 *
 * Get this process' CPU affinity PHYSICAL bitmask and assign
 * it to \em cpumask.  
 *
 * If no paffinity components were available, or if the
 * opal_paffinity_base_select() was never invoked, OPAL_NOT_FOUND
 * is returned and cpumask is zeroed out.
 */
OPAL_DECLSPEC int opal_paffinity_base_get(opal_paffinity_base_cpu_set_t *cpumask);

/**
 * Shut down the paffinity MCA framework.
 *
 * @retval OPAL_SUCCESS Always
 *
 * This function shuts down everything in the paffinity MCA
 * framework, and is called during opal_finalize().
 *
 * It must be the last function invoked on the paffinity MCA
 * framework.
 */
OPAL_DECLSPEC int opal_paffinity_base_close(void);

/**
 * Get map of (socket,core) tuple to virtual processor ID
 * 
 * @param socket
 * @param core
 * @param processor_id
 * 
 * @return int - OPAL_SUCCESS or OPAL_ERR_NOT_SUPPORTED if not
 *         supported
 */
OPAL_DECLSPEC int opal_paffinity_base_get_map_to_processor_id(int socket, int core, int *processor_id);

/**
 * Get map of processor_id to (socket,core) tuple
 * 
 * @param processor_id
 * @param socket
 * @param core
 * 
 * @return int - OPAL_SUCCESS or OPAL_ERR_NOT_SUPPORTED if not
 *         supported
 */
OPAL_DECLSPEC int opal_paffinity_base_get_map_to_socket_core(int processor_id, int *socket, int *core);

/**
 * Return the number of LOGICAL processors
 * 
 * @param max_processor_id
 * 
 * @return int - OPAL_SUCCESS or OPAL_ERR_NOT_SUPPORTED if not
 *         supported
 */
OPAL_DECLSPEC int opal_paffinity_base_get_processor_info(int *num_logical_processors);

/**
 * Return the number of LOGICAL sockets
 * 
 * @param max_socket
 * 
 * @return int - OPAL_SUCCESS or OPAL_ERR_NOT_SUPPORTED if not
 *         supported
 */
OPAL_DECLSPEC int opal_paffinity_base_get_socket_info(int *num_logical_sockets);

/**
 * Return the number of LOGICAL cores for a given PHYSICAL socket
 * 
 * @param socket
 * @param max_core
 * 
 * @return int - OPAL_SUCCESS or OPAL_ERR_NOT_SUPPORTED if not
 *         supported
 */
OPAL_DECLSPEC int opal_paffinity_base_get_core_info(int physical_socket, int *num_logical_cores);

/**
 * Return the PHYSICAL processor id that corresponds to the
 * given LOGICAL processor id
 */
OPAL_DECLSPEC int opal_paffinity_base_get_physical_processor_id(int logical_processor_id);

/**
 * Return the PHYSICAL socket id that corresponds to the given
 * LOGICAL socket id
 */
OPAL_DECLSPEC int opal_paffinity_base_get_physical_socket_id(int logical_socket_id);

/**
 * Return the PHYSICAL core id that corresponds to the given LOGICAL
 * core id on the given PHYSICAL socket id
 */
OPAL_DECLSPEC int opal_paffinity_base_get_physical_core_id(int physical_socket_id, int logical_core_id);


/**
 * Indication of whether a component was successfully selected or
 * not
 */
OPAL_DECLSPEC extern bool opal_paffinity_base_selected;

/**
 * Global component struct for the selected component
 */
OPAL_DECLSPEC extern const opal_paffinity_base_component_2_0_0_t 
*opal_paffinity_base_component;
/**
 * Global module struct for the selected module
 */
OPAL_DECLSPEC extern const opal_paffinity_base_module_1_1_0_t 
*opal_paffinity_base_module;
/**
 * Indicator as to whether the list of opened paffinity components
 * is valid or not.
 */
OPAL_DECLSPEC extern bool opal_paffinity_base_components_opened_valid;
/**
 * List of all opened components; created when the paffinity
 * framework is initialized and destroyed when we reduce the list
 * to all available paffinity components.
 */
OPAL_DECLSPEC extern opal_list_t opal_paffinity_base_components_opened;
/**
 * Assigning slot_list to process 
 */
OPAL_DECLSPEC int opal_paffinity_base_slot_list_set(long rank, char *slot_str);

/**
 * Debugging output stream
 */
OPAL_DECLSPEC extern int opal_paffinity_base_output;

/**
 * Flag indicating whether or not processor affinity is to be enabled
 */
OPAL_DECLSPEC extern bool opal_paffinity_alone;

OPAL_DECLSPEC extern char *opal_paffinity_base_slot_list;

END_C_DECLS

#endif /* OPAL_BASE_PAFFINITY_H */