507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * CDDL HEADER START
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf *
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * The contents of this file are subject to the terms of the
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Common Development and Distribution License (the "License").
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * You may not use this file except in compliance with the License.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf *
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * or http://www.opensolaris.org/os/licensing.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * See the License for the specific language governing permissions
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * and limitations under the License.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf *
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * When distributing Covered Code, include this CDDL HEADER in each
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * If applicable, add the following below this CDDL HEADER, with the
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * fields enclosed by brackets "[]" replaced with your own identifying
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * information: Portions Copyright [yyyy] [name of copyright owner]
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf *
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * CDDL HEADER END
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Copyright 1999 Sun Microsystems, Inc. All rights reserved.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Use is subject to license terms.
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf#pragma ident "%Z%%M% %I% %E% SMI"
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf#include "ghd.h"
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Round up all allocations so that we can guarantee
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * long-long alignment. This is the same alignment
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * provided by kmem_alloc().
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf#define ROUNDUP(x) (((x) + 0x07) & ~0x07)
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Private wrapper for gcmd_t
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlftypedef struct gw_gcmd_and_length {
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gcmd_t gcmd; /* this must be first */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf int glen; /* length includes HBA private area */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf}gw_t;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * round up the size so the HBA private area is on a 8 byte boundary
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf#define GW_PADDED_LENGTH ROUNDUP(sizeof (gw_t))
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlftypedef struct gcmd_padded_wrapper {
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf union {
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gw_t gw;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf char gw_pad[GW_PADDED_LENGTH];
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf } gwrap;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf} gwrap_t;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Allocate a gcmd_t wrapper and HBA private area
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlfgcmd_t *
507c32411f3f101e90ca2120f042b5ee698ba1d5mlfghd_gcmd_alloc(gtgt_t *gtgtp,
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf int ccblen,
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf int sleep)
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf{
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gwrap_t *gwp;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gcmd_t *gcmdp;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf int gwrap_len;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf ccblen = ROUNDUP(ccblen);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gwrap_len = sizeof (gwrap_t) + ccblen;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gwp = kmem_zalloc(gwrap_len, (sleep ? KM_SLEEP : KM_NOSLEEP));
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf if (gwp == NULL) {
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf ASSERT(sleep == FALSE);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf return (NULL);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf }
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf /* save the total length for the free function */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gwp->gwrap.gw.glen = gwrap_len;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf /*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * save the ptr to HBA private area and initialize all
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * the gcmd_t members and save
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf gcmdp = &gwp->gwrap.gw.gcmd;
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf GHD_GCMD_INIT(gcmdp, (void *)(gwp + 1), gtgtp);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf return (gcmdp);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf}
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf/*
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf * Free the gcmd_t wrapper and HBA private area
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf */
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf
507c32411f3f101e90ca2120f042b5ee698ba1d5mlfvoid
507c32411f3f101e90ca2120f042b5ee698ba1d5mlfghd_gcmd_free(gcmd_t *gcmdp)
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf{
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf kmem_free(gcmdp, ((gw_t *)gcmdp)->glen);
507c32411f3f101e90ca2120f042b5ee698ba1d5mlf}