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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_VIO_COMMON_H 28 #define _SYS_VIO_COMMON_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/ldc.h> 37 38 /* 39 * Common header for VIO descriptor ring entries 40 */ 41 typedef struct vio_dring_entry_hdr { 42 uint8_t dstate; /* Current state of Dring entry */ 43 uint8_t ack:1; /* 1 => receiver must ACK when DONE */ 44 45 /* 46 * Padding. 47 */ 48 uint16_t resv[3]; 49 } vio_dring_entry_hdr_t; 50 51 /* 52 * Common macros for acquiring and releasing VIO descriptor ring entries 53 */ 54 #define VIO_DRING_ACQUIRE(otd, mtype, handle, start, stop) \ 55 ((mtype) == LDC_DIRECT_MAP ? \ 56 LDC_MEM_BARRIER_OPEN((otd)) : \ 57 ldc_mem_dring_acquire((handle), (start), (stop))) 58 59 #define VIO_DRING_ACQUIRE_NOCOPYIN(otd, mtype) \ 60 ((mtype) == LDC_DIRECT_MAP ? \ 61 LDC_MEM_BARRIER_OPEN((otd)) : 0) 62 63 #define VIO_DRING_RELEASE(mtype, handle, start, stop) \ 64 ((mtype) == LDC_DIRECT_MAP ? \ 65 LDC_MEM_BARRIER_CLOSE() : \ 66 ldc_mem_dring_release((handle), (start), (stop))) 67 68 #define VIO_DRING_RELEASE_NOCOPYOUT(mtype) \ 69 ((mtype) == LDC_DIRECT_MAP ? \ 70 LDC_MEM_BARRIER_CLOSE() : 0) 71 72 #ifdef __cplusplus 73 } 74 #endif 75 76 #endif /* _SYS_VIO_COMMON_H */ 77