diff options
Diffstat (limited to 'usr/src/uts/sun4u/sys/pci/pci_axq.h')
| -rw-r--r-- | usr/src/uts/sun4u/sys/pci/pci_axq.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/usr/src/uts/sun4u/sys/pci/pci_axq.h b/usr/src/uts/sun4u/sys/pci/pci_axq.h new file mode 100644 index 0000000000..b10d06d208 --- /dev/null +++ b/usr/src/uts/sun4u/sys/pci/pci_axq.h @@ -0,0 +1,65 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (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 (c) 2001 by Sun Microsystems, Inc. + * All rights reserved. + */ + +#ifndef _SYS_PCI_AXQ_H +#define _SYS_PCI_AXQ_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/types.h> +#include <sys/atomic.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#define PIO_LIMIT_ENTER(p) { \ + int n;\ + for (;;) {\ + do {\ + n = p->pbm_pio_counter;\ + } while (n <= 0);\ + if (atomic_add_32_nv(\ + (uint_t *)&p->pbm_pio_counter, -1)\ + == (n - 1))\ + break;\ + atomic_add_32(\ + (uint_t *)&p->pbm_pio_counter, 1);\ + }\ + } + + + +#define PIO_LIMIT_EXIT(p) atomic_add_32((uint_t *)&p->pbm_pio_counter, 1); + +extern void pci_axq_setup(ddi_map_req_t *mp, pbm_t *pbm_p); +extern void pci_axq_pio_limit(pbm_t *pbm_p); + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_PCI_AXQ_H */ |