drivers/scsi/bfa/bfa_fcs_uf.c

/*
 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

/**
 *  bfa_fcs_uf.c BFA FCS UF ( Unsolicited Frames)
 */

#include <fcs/bfa_fcs.h>
#include <bfa_svc.h>
#include <fcs/bfa_fcs_fabric.h>
#include "fcs.h"
#include "fcs_trcmod.h"
#include "fcs_fabric.h"
#include "fcs_uf.h"

BFA_TRC_FILE(FCS, UF);

/**
 * 		BFA callback for unsolicited frame receive handler.
 *
 * @param[in]		cbarg		callback arg for receive handler
 * @param[in]		uf		unsolicited frame descriptor
 *
 * @return None
 */
static void
bfa_fcs_uf_recv(void *cbarg, struct bfa_uf_s *uf)
{
	struct bfa_fcs_s      *fcs = (struct bfa_fcs_s *) cbarg;
	struct fchs_s         *fchs = bfa_uf_get_frmbuf(uf);
	u16        len = bfa_uf_get_frmlen(uf);
	struct fc_vft_s       *vft;
	struct bfa_fcs_fabric_s *fabric;

	/**
	 * check for VFT header
	 */
	if (fchs->routing == FC_RTG_EXT_HDR &&
		fchs->cat_info == FC_CAT_VFT_HDR) {
		bfa_stats(fcs, uf.tagged);
		vft = bfa_uf_get_frmbuf(uf);
		if (fcs->port_vfid == vft->vf_id)
			fabric = &fcs->fabric;
		else
			fabric = bfa_fcs_vf_lookup(fcs, (u16) vft->vf_id);

		/**
		 * drop frame if vfid is unknown
		 */
		if (!fabric) {
			bfa_assert(0);
			bfa_stats(fcs, uf.vfid_unknown);
			bfa_uf_free(uf);
			return;
		}

		/**
		 * skip vft header
		 */
		fchs = (struct fchs_s *) (vft + 1);
		len -= sizeof(struct fc_vft_s);

		bfa_trc(fcs, vft->vf_id);
	} else {
		bfa_stats(fcs, uf.untagged);
		fabric = &fcs->fabric;
	}

	bfa_trc(fcs, ((u32 *) fchs)[0]);
	bfa_trc(fcs, ((u32 *) fchs)[1]);
	bfa_trc(fcs, ((u32 *) fchs)[2]);
	bfa_trc(fcs, ((u32 *) fchs)[3]);
	bfa_trc(fcs, ((u32 *) fchs)[4]);
	bfa_trc(fcs, ((u32 *) fchs)[5]);
	bfa_trc(fcs, len);

	bfa_fcs_fabric_uf_recv(fabric, fchs, len);
	bfa_uf_free(uf);
}

void
bfa_fcs_uf_attach(struct bfa_fcs_s *fcs)
{
	bfa_uf_recv_register(fcs->bfa, bfa_fcs_uf_recv, fcs);
}