/*
 * 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 (c) 2002-2003, Network Appliance, Inc. All rights reserved.
 */

/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 *
 * MODULE: dapl_rsp_create.c
 *
 * PURPOSE: Connection management
 * Description: Interfaces in this file are completely described in
 *		the DAPL 1.1 API, Chapter 6, section 4
 *
 * $Id: dapl_rsp_create.c,v 1.14 2003/07/25 19:24:11 sjs2 Exp $
 */

#include "dapl.h"
#include "dapl_sp_util.h"
#include "dapl_ia_util.h"
#include "dapl_ep_util.h"
#include "dapl_adapter_util.h"

/*
 * dapl_rsp_create
 *
 * uDAPL: User Direct Access Program Library Version 1.1, 6.4.3.4.1
 *
 * Create a Resereved Service Point with the specified Endpoint
 * that generates at most one Connection Request that is
 * delivered to the specified Event Dispatcher in a notification
 * event
 *
 * Input:
 *	ia_handle
 *	conn_qual
 *	ep_handle
 *	evd_handle
 *
 * Output:
 *	rsp_handle
 *
 * Returns:
 *	DAT_SUCCESS
 *	DAT_INSUFFICIENT_RESOURCES
 *	DAT_INVALID_PARAMETER
 *	DAT_INVALID_STATE
 *	DAT_CONN_QUAL_IN_USE
 */
DAT_RETURN
dapl_rsp_create(
	IN DAT_IA_HANDLE ia_handle,
	IN DAT_CONN_QUAL conn_qual,
	IN DAT_EP_HANDLE ep_handle,
	IN DAT_EVD_HANDLE evd_handle,
	OUT DAT_RSP_HANDLE *rsp_handle)
{
	DAPL_IA	*ia_ptr;
	DAPL_SP	*sp_ptr;
	DAPL_EVD *evd_ptr;
	DAPL_EP	*ep_ptr;
	DAT_BOOLEAN sp_found;
	DAT_RETURN dat_status;

	dat_status = DAT_SUCCESS;
	ia_ptr = (DAPL_IA *)ia_handle;

	dapl_dbg_log(DAPL_DBG_TYPE_CM,
	    ">>> dapl_rsp_free conn_qual: %x EP: %p\n",
	    conn_qual, ep_handle);

	if (DAPL_BAD_HANDLE(ia_ptr, DAPL_MAGIC_IA)) {
		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
		    DAT_INVALID_HANDLE_IA);
		goto bail;
	}
	if (DAPL_BAD_HANDLE(ep_handle, DAPL_MAGIC_EP)) {
		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
		    DAT_INVALID_HANDLE_EP);
		goto bail;
	}
	if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
		    DAT_INVALID_HANDLE_EVD_CR);
		goto bail;
	}

	if (rsp_handle == NULL) {
		dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG5);
		goto bail;
	}

	ep_ptr = (DAPL_EP *) ep_handle;
	if (ep_ptr->param.ep_state != DAT_EP_STATE_UNCONNECTED) {
		dat_status = DAT_ERROR(DAT_INVALID_STATE,
		    dapls_ep_state_subtype(ep_ptr));
		goto bail;
	}

	evd_ptr = (DAPL_EVD *)evd_handle;
	if (!(evd_ptr->evd_flags & DAT_EVD_CR_FLAG)) {
		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
		    DAT_INVALID_HANDLE_EVD_CR);
		goto bail;
	}

	sp_ptr = dapls_ia_sp_search(ia_ptr, conn_qual, DAT_FALSE);
	sp_found = DAT_TRUE;
	if (sp_ptr == NULL) {
		sp_found = DAT_FALSE;

		/* Allocate RSP */
		sp_ptr = dapls_sp_alloc(ia_ptr, DAT_FALSE);
		if (sp_ptr == NULL) {
			dat_status = DAT_ERROR(DAT_INSUFFICIENT_RESOURCES,
			    DAT_RESOURCE_MEMORY);
			goto bail;
		}
	}

	/*
	 * Fill out the RSP args
	 */
	sp_ptr->ia_handle  = ia_handle;
	sp_ptr->conn_qual  = conn_qual;
	sp_ptr->evd_handle = evd_handle;
	sp_ptr->psp_flags  = 0;
	sp_ptr->ep_handle  = ep_handle;

	/*
	 * Take a reference on the EVD handle
	 */
	(void) dapl_os_atomic_inc(&((DAPL_EVD *)evd_handle)->evd_ref_count);

	/*
	 * Update the EP state indicating the provider now owns it
	 */
	ep_ptr->param.ep_state = DAT_EP_STATE_RESERVED;

	/*
	 * Set up a listener for a connection. Connections can arrive
	 * even before this call returns!
	 */
	sp_ptr->state = DAPL_SP_STATE_RSP_LISTENING;
	sp_ptr->listening = DAT_TRUE;

	if (sp_found == DAT_FALSE) {
	/* Link it onto the IA */
		dapl_ia_link_rsp(ia_ptr, sp_ptr);

		dat_status = dapls_ib_setup_conn_listener(ia_ptr, conn_qual,
		    sp_ptr);

		if (dat_status != DAT_SUCCESS) {
			/*
			 * Have a problem setting up the connection, something
			 * wrong!
			 * rsp_free will decrement the EVD refcount. Set
			 * listening to * false to avoid tearing down the
			 * conn_listener which didn't * get set up.
			 */
			sp_ptr->listening = DAT_FALSE;
			(void) dapl_rsp_free((DAT_RSP_HANDLE) sp_ptr);

			dapl_dbg_log(DAPL_DBG_TYPE_CM,
			    "--> dapl_rsp_create setup_conn_listener failed: "
			    "%x\n",
			    dat_status);

			goto bail;
		}
	}

	/*
	 * Return handle to the user
	 */
	*rsp_handle = (DAT_RSP_HANDLE)sp_ptr;

bail:
	return (dat_status);
}