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 #include "ghd.h" 28 29 /* 30 * Round up all allocations so that we can guarantee 31 * long-long alignment. This is the same alignment 32 * provided by kmem_alloc(). 33 */ 34 #define ROUNDUP(x) (((x) + 0x07) & ~0x07) 35 36 /* 37 * Private wrapper for gcmd_t 38 */ 39 typedef struct gw_gcmd_and_length { 40 gcmd_t gcmd; /* this must be first */ 41 int glen; /* length includes HBA private area */ 42 }gw_t; 43 44 /* 45 * round up the size so the HBA private area is on a 8 byte boundary 46 */ 47 #define GW_PADDED_LENGTH ROUNDUP(sizeof (gw_t)) 48 49 typedef struct gcmd_padded_wrapper { 50 union { 51 gw_t gw; 52 char gw_pad[GW_PADDED_LENGTH]; 53 54 } gwrap; 55 } gwrap_t; 56 57 /* 58 * Allocate a gcmd_t wrapper and HBA private area 59 */ 60 61 gcmd_t * 62 ghd_gcmd_alloc(gtgt_t *gtgtp, 63 int ccblen, 64 int sleep) 65 { 66 gwrap_t *gwp; 67 gcmd_t *gcmdp; 68 int gwrap_len; 69 70 ccblen = ROUNDUP(ccblen); 71 gwrap_len = sizeof (gwrap_t) + ccblen; 72 gwp = kmem_zalloc(gwrap_len, (sleep ? KM_SLEEP : KM_NOSLEEP)); 73 if (gwp == NULL) { 74 ASSERT(sleep == FALSE); 75 return (NULL); 76 } 77 78 /* save the total length for the free function */ 79 gwp->gwrap.gw.glen = gwrap_len; 80 81 /* 82 * save the ptr to HBA private area and initialize all 83 * the gcmd_t members and save 84 */ 85 gcmdp = &gwp->gwrap.gw.gcmd; 86 GHD_GCMD_INIT(gcmdp, (void *)(gwp + 1), gtgtp); 87 return (gcmdp); 88 } 89 90 91 92 /* 93 * Free the gcmd_t wrapper and HBA private area 94 */ 95 96 void 97 ghd_gcmd_free(gcmd_t *gcmdp) 98 { 99 kmem_free(gcmdp, ((gw_t *)gcmdp)->glen); 100 } 101