/*

 * Copyright (c) 2004-2008 Voltaire, Inc. All rights reserved.

 * Copyright (c) 2002-2011 Mellanox Technologies LTD. All rights reserved.

 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.

 * Copyright (c) 2013 Oracle and/or its affiliates. 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:

 *    Implementation of osm_cpi_rcv_t.

 * This object represents the ClassPortInfo Receiver object.

 * This object is part of the opensm family of objects.

 */

#if HAVE_CONFIG_H

#  include <config.h>

#endif				/* HAVE_CONFIG_H */

#include <string.h>

#include <iba/ib_types.h>

#include <complib/cl_qmap.h>

#include <complib/cl_passivelock.h>

#include <complib/cl_debug.h>

#include <complib/cl_qlist.h>

#include <opensm/osm_file_ids.h>

#define FILE_ID OSM_FILE_SA_CLASS_PORT_INFO_C

#include <vendor/osm_vendor_api.h>

#include <opensm/osm_helper.h>

#include <opensm/osm_sa.h>

#define MAX_MSECS_TO_RTV 24

/* Precalculated table in msec (index is related to encoded value) */

/* 4.096 usec * 2 ** n (where n = 8 - 31) */

const static uint32_t msecs_to_rtv_table[MAX_MSECS_TO_RTV] = {

	1, 2, 4, 8,

	16, 33, 67, 134,

	268, 536, 1073, 2147,

	4294, 8589, 17179, 34359,

	68719, 137438, 274877, 549755,

	1099511, 2199023, 4398046, 8796093

};

static void cpi_rcv_respond(IN osm_sa_t * sa, IN const osm_madw_t * p_madw)

{

	osm_madw_t *p_resp_madw;

	const ib_sa_mad_t *p_sa_mad;

	ib_sa_mad_t *p_resp_sa_mad;

	ib_class_port_info_t *p_resp_cpi;

	ib_gid_t zero_gid;

	uint32_t cap_mask2;

	uint8_t rtv;

	OSM_LOG_ENTER(sa->p_log);

	memset(&zero_gid, 0, sizeof(ib_gid_t));

	/*

	   Get a MAD to reply. Address of Mad is in the received mad_wrapper

	 */

	p_resp_madw = osm_mad_pool_get(sa->p_mad_pool, p_madw->h_bind,

				       MAD_BLOCK_SIZE, &p_madw->mad_addr);

	if (!p_resp_madw) {

		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 1408: "

			"Unable to allocate MAD\n");

		goto Exit;

	}

	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);

	p_resp_sa_mad = osm_madw_get_sa_mad_ptr(p_resp_madw);

	memcpy(p_resp_sa_mad, p_sa_mad, IB_SA_MAD_HDR_SIZE);

	p_resp_sa_mad->method |= IB_MAD_METHOD_RESP_MASK;

	/* C15-0.1.5 - always return SM_Key = 0 (table 185 p 884) */

	p_resp_sa_mad->sm_key = 0;

	p_resp_cpi =

	    (ib_class_port_info_t *) ib_sa_mad_get_payload_ptr(p_resp_sa_mad);

	/* finally do it (the job) man ! */

	p_resp_cpi->base_ver = 1;

	p_resp_cpi->class_ver = 2;

	/* Calculate encoded response time value */

	/* transaction timeout is in msec */

	if (sa->p_subn->opt.transaction_timeout >

	    msecs_to_rtv_table[MAX_MSECS_TO_RTV - 1])

		rtv = MAX_MSECS_TO_RTV - 1;

	else {

		for (rtv = 0; rtv < MAX_MSECS_TO_RTV; rtv++) {

			if (sa->p_subn->opt.transaction_timeout <=

			    msecs_to_rtv_table[rtv])

				break;

		}

	}

	rtv += 8;

	ib_class_set_resp_time_val(p_resp_cpi, rtv);

	p_resp_cpi->redir_gid = zero_gid;

	p_resp_cpi->redir_tc_sl_fl = 0;

	p_resp_cpi->redir_lid = 0;

	p_resp_cpi->redir_pkey = 0;

	p_resp_cpi->redir_qp = CL_NTOH32(1);

	p_resp_cpi->redir_qkey = IB_QP1_WELL_KNOWN_Q_KEY;

	p_resp_cpi->trap_gid = zero_gid;

	p_resp_cpi->trap_tc_sl_fl = 0;

	p_resp_cpi->trap_lid = 0;

	p_resp_cpi->trap_pkey = 0;

	p_resp_cpi->trap_hop_qp = 0;

	p_resp_cpi->trap_qkey = IB_QP1_WELL_KNOWN_Q_KEY;

	/* set specific capability mask bits */

	/* we do not support the following options/optional records:

	   OSM_CAP_IS_SUBN_OPT_RECS_SUP :

	   RandomForwardingTableRecord,

	   ServiceAssociationRecord

	   other optional records supported "under the table"

	   OSM_CAP_IS_MULTIPATH_SUP:

	   TraceRecord

	   OSM_CAP_IS_REINIT_SUP:

	   For reinitialization functionality.

	   So not sending traps, but supporting Get(Notice) and Set(Notice).

	 */

	/* Note host notation replaced later */

#if defined (VENDOR_RMPP_SUPPORT) && defined (DUAL_SIDED_RMPP)

	p_resp_cpi->cap_mask = OSM_CAP_IS_SUBN_GET_SET_NOTICE_SUP |

	    OSM_CAP_IS_PORT_INFO_CAPMASK_MATCH_SUPPORTED |

	    OSM_CAP_IS_MULTIPATH_SUP;

#else

	p_resp_cpi->cap_mask = OSM_CAP_IS_SUBN_GET_SET_NOTICE_SUP |

	    OSM_CAP_IS_PORT_INFO_CAPMASK_MATCH_SUPPORTED;

#endif

	cap_mask2 = OSM_CAP2_IS_FULL_PORTINFO_REC_SUPPORTED |

		    OSM_CAP2_IS_EXTENDED_SPEEDS_SUPPORTED |

		    OSM_CAP2_IS_ALIAS_GUIDS_SUPPORTED |

		    OSM_CAP2_IS_MULTICAST_SERVICE_RECS_SUPPORTED |

		    OSM_CAP2_IS_PORT_INFO_CAPMASK2_MATCH_SUPPORTED |

		    OSM_CAP2_IS_SEND_ONLY_FULL_MEMBER_SUPPORTED |

		    OSM_CAP2_IS_LINK_WIDTH_2X_SUPPORTED |

		    OSM_CAP2_IS_LINK_SPEED_HDR_SUPPORTED;

	if (sa->p_subn->opt.use_mfttop)

		cap_mask2 |= OSM_CAP2_IS_MCAST_TOP_SUPPORTED;

	if (sa->p_subn->opt.qos)

		cap_mask2 |= OSM_CAP2_IS_QOS_SUPPORTED;

	ib_class_set_cap_mask2(p_resp_cpi, cap_mask2);

	if (!sa->p_subn->opt.disable_multicast)

		p_resp_cpi->cap_mask |= OSM_CAP_IS_UD_MCAST_SUP;

	p_resp_cpi->cap_mask = cl_hton16(p_resp_cpi->cap_mask);

	if (OSM_LOG_IS_ACTIVE_V2(sa->p_log, OSM_LOG_FRAMES))

		osm_dump_sa_mad_v2(sa->p_log, p_resp_sa_mad, FILE_ID, OSM_LOG_FRAMES);

	osm_sa_send(sa, p_resp_madw, FALSE);

Exit:

	OSM_LOG_EXIT(sa->p_log);

}

/**********************************************************************

 * This code actually handles the call

 **********************************************************************/

void osm_cpi_rcv_process(IN void *context, IN void *data)

{

	osm_sa_t *sa = context;

	osm_madw_t *p_madw = data;

	const ib_sa_mad_t *p_sa_mad;

	OSM_LOG_ENTER(sa->p_log);

	CL_ASSERT(p_madw);

	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);

	/* we only support GET */

	if (p_sa_mad->method != IB_MAD_METHOD_GET) {

		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 1403: "

			"Unsupported Method (%s) for ClassPortInfo request\n",

			ib_get_sa_method_str(p_sa_mad->method));

		osm_sa_send_error(sa, p_madw, IB_SA_MAD_STATUS_REQ_INVALID);

		goto Exit;

	}

	CL_ASSERT(p_sa_mad->attr_id == IB_MAD_ATTR_CLASS_PORT_INFO);

	/* CLASS PORT INFO does not really look at the SMDB - no lock required. */

	cpi_rcv_respond(sa, p_madw);

Exit:

	OSM_LOG_EXIT(sa->p_log);

}