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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _SYS_PCI_AXQ_H 28 #define _SYS_PCI_AXQ_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 #include <sys/atomic.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 #define PIO_LIMIT_ENTER(p) { \ 40 int n;\ 41 for (;;) {\ 42 do {\ 43 n = p->pbm_pio_counter;\ 44 } while (n <= 0);\ 45 if (atomic_add_32_nv(\ 46 (uint_t *)&p->pbm_pio_counter, -1)\ 47 == (n - 1))\ 48 break;\ 49 atomic_add_32(\ 50 (uint_t *)&p->pbm_pio_counter, 1);\ 51 }\ 52 } 53 54 55 56 #define PIO_LIMIT_EXIT(p) atomic_add_32((uint_t *)&p->pbm_pio_counter, 1); 57 58 extern void pci_axq_setup(ddi_map_req_t *mp, pbm_t *pbm_p); 59 extern void pci_axq_pio_limit(pbm_t *pbm_p); 60 61 #ifdef __cplusplus 62 } 63 #endif 64 65 #endif /* _SYS_PCI_AXQ_H */ 66