1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 1999 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "ghd.h" 30 31 /* 32 * Round up all allocations so that we can guarantee 33 * long-long alignment. This is the same alignment 34 * provided by kmem_alloc(). 35 */ 36 #define ROUNDUP(x) (((x) + 0x07) & ~0x07) 37 38 /* 39 * Private wrapper for gcmd_t 40 */ 41 typedef struct gw_gcmd_and_length { 42 gcmd_t gcmd; /* this must be first */ 43 int glen; /* length includes HBA private area */ 44 }gw_t; 45 46 /* 47 * round up the size so the HBA private area is on a 8 byte boundary 48 */ 49 #define GW_PADDED_LENGTH ROUNDUP(sizeof (gw_t)) 50 51 typedef struct gcmd_padded_wrapper { 52 union { 53 gw_t gw; 54 char gw_pad[GW_PADDED_LENGTH]; 55 56 } gwrap; 57 } gwrap_t; 58 59 /* 60 * Allocate a gcmd_t wrapper and HBA private area 61 */ 62 63 gcmd_t * 64 ghd_gcmd_alloc(gtgt_t *gtgtp, 65 int ccblen, 66 int sleep) 67 { 68 gwrap_t *gwp; 69 gcmd_t *gcmdp; 70 int gwrap_len; 71 72 ccblen = ROUNDUP(ccblen); 73 gwrap_len = sizeof (gwrap_t) + ccblen; 74 gwp = kmem_zalloc(gwrap_len, (sleep ? KM_SLEEP : KM_NOSLEEP)); 75 if (gwp == NULL) { 76 ASSERT(sleep == FALSE); 77 return (NULL); 78 } 79 80 /* save the total length for the free function */ 81 gwp->gwrap.gw.glen = gwrap_len; 82 83 /* 84 * save the ptr to HBA private area and initialize all 85 * the gcmd_t members and save 86 */ 87 gcmdp = &gwp->gwrap.gw.gcmd; 88 GHD_GCMD_INIT(gcmdp, (void *)(gwp + 1), gtgtp); 89 return (gcmdp); 90 } 91 92 93 94 /* 95 * Free the gcmd_t wrapper and HBA private area 96 */ 97 98 void 99 ghd_gcmd_free(gcmd_t *gcmdp) 100 { 101 kmem_free(gcmdp, ((gw_t *)gcmdp)->glen); 102 } 103