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/*
* 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 1999 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "ghd.h"
/*
* Round up all allocations so that we can guarantee
* long-long alignment. This is the same alignment
* provided by kmem_alloc().
*/
#define ROUNDUP(x) (((x) + 0x07) & ~0x07)
/*
* Private wrapper for gcmd_t
*/
typedef struct gw_gcmd_and_length {
gcmd_t gcmd; /* this must be first */
int glen; /* length includes HBA private area */
}gw_t;
/*
* round up the size so the HBA private area is on a 8 byte boundary
*/
#define GW_PADDED_LENGTH ROUNDUP(sizeof (gw_t))
typedef struct gcmd_padded_wrapper {
union {
gw_t gw;
char gw_pad[GW_PADDED_LENGTH];
} gwrap;
} gwrap_t;
/*
* Allocate a gcmd_t wrapper and HBA private area
*/
gcmd_t *
ghd_gcmd_alloc(gtgt_t *gtgtp,
int ccblen,
int sleep)
{
gwrap_t *gwp;
gcmd_t *gcmdp;
int gwrap_len;
ccblen = ROUNDUP(ccblen);
gwrap_len = sizeof (gwrap_t) + ccblen;
gwp = kmem_zalloc(gwrap_len, (sleep ? KM_SLEEP : KM_NOSLEEP));
if (gwp == NULL) {
ASSERT(sleep == FALSE);
return (NULL);
}
/* save the total length for the free function */
gwp->gwrap.gw.glen = gwrap_len;
/*
* save the ptr to HBA private area and initialize all
* the gcmd_t members and save
*/
gcmdp = &gwp->gwrap.gw.gcmd;
GHD_GCMD_INIT(gcmdp, (void *)(gwp + 1), gtgtp);
return (gcmdp);
}
/*
* Free the gcmd_t wrapper and HBA private area
*/
void
ghd_gcmd_free(gcmd_t *gcmdp)
{
kmem_free(gcmdp, ((gw_t *)gcmdp)->glen);
}
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