sun_sas/common/Sun_sasFreeLibrary.c

	Sun_sasFreeLibrary.c revision 9e86db79b7d1bbc5f2f04e99954cbd5eae0e22bb
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


#include <sun_sas.h>

/*
 * Frees the HBA Library.  Must be called after all HBA library functions
 * to free all resources
 */
HBA_STATUS Sun_sasFreeLibrary() {
    HBA_STATUS  status;

    lock(&all_hbas_lock);

    status = FreeHBA(global_hba_head);

    /* re-initialize all global variables */
    global_hba_head = NULL;
    hba_count = 0;
    open_handle_index = 1;
    unlock(&all_hbas_lock);
    (void) mutex_destroy(&all_hbas_lock);

    /* free sysevent handle. */
    if (gSysEventHandle != NULL)
        sysevent_unbind_handle(gSysEventHandle);

    /* Reset our load count so we can be reloaded now */
    loadCount = 0;

    return (status);
}

/*
 * Internal routine to free up hba_ptr's (and all sub-structures)
 */
HBA_STATUS FreeHBA(struct sun_sas_hba *hba) {
    struct sun_sas_hba  *hba_ptr = NULL;
    struct sun_sas_hba  *last_hba_ptr = NULL;
    struct sun_sas_port *hba_port = NULL;
    struct sun_sas_port *last_hba_port = NULL;
    struct sun_sas_port *tgt_port = NULL;
    struct sun_sas_port *last_tgt_port = NULL;
    struct ScsiEntryList    *scsi_info = NULL;
    struct ScsiEntryList    *last_scsi_info = NULL;
    struct phy_info     *phy_ptr = NULL;
    struct phy_info     *last_phy = NULL;
    struct open_handle  *open_handle = NULL;
    struct open_handle  *last_open_handle = NULL;

    last_hba_ptr = NULL;
    /* walk through global_hba_head list freeing each handle */
    for (hba_ptr = hba;
        hba_ptr != NULL;
        hba_ptr = hba_ptr->next) {
        /* Free the nested structures (port and attached port) */
        hba_port = hba_ptr->first_port;
        while (hba_port != NULL) {
            /* Free discovered port structure list. */
            tgt_port = hba_port->first_attached_port;
            while (tgt_port != NULL) {
                /* Free target mapping data list first. */
                scsi_info = tgt_port->scsiInfo;
                while (scsi_info != NULL) {
                    last_scsi_info = scsi_info;
                    scsi_info = scsi_info->next;
                    free(last_scsi_info);
                }
            last_tgt_port = tgt_port;
            tgt_port = tgt_port->next;
            free(last_tgt_port->port_attributes.\
                PortSpecificAttribute.SASPort);
            free(last_tgt_port);
            }

            phy_ptr = hba_port->first_phy;
            while (phy_ptr != NULL) {
            last_phy = phy_ptr;
            phy_ptr = phy_ptr->next;
            free(last_phy);
            }

            last_hba_port = hba_port;
            hba_port = hba_port->next;
            free(last_hba_port->port_attributes.\
            PortSpecificAttribute.SASPort);
            free(last_hba_port);
        }

        open_handle = hba_ptr->open_handles;
        while (open_handle != NULL) {
            last_open_handle = open_handle;
            open_handle = open_handle->next;
            free(last_open_handle);
        }
        /* Free up the top level HBA structure from the last spin */
        if (last_hba_ptr != NULL) {
            free(last_hba_ptr);
        }
        last_hba_ptr = hba_ptr;
    }
    if (last_hba_ptr != NULL) {
        free(last_hba_ptr);
    }

    return (HBA_STATUS_OK);
}