// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ZIRCON_SYSCALLS_IOB_H_
#define ZIRCON_SYSCALLS_IOB_H_

#include <zircon/compiler.h>

__BEGIN_CDECLS

// A somewhat arbitrary limitation on the number of IOBuffer regions to protect us from having to
// handle IOBuffers with extremely large numbers of regions.
#define ZX_IOB_MAX_REGIONS 64

// TODO(fxb/118650): Clarify and finalize the ringbuffer disciplines.
#define ZX_IOB_DISCIPLINE_TYPE_NONE (0)

#define ZX_IOB_REGION_TYPE_PRIVATE (0)

// Access modifiers
#define ZX_IOB_EP0_CAN_MAP_READ (1 << 0)
#define ZX_IOB_EP0_CAN_MAP_WRITE (1 << 1)
#define ZX_IOB_EP0_CAN_MEDIATED_READ (1 << 2)
#define ZX_IOB_EP0_CAN_MEDIATED_WRITE (1 << 3)
#define ZX_IOB_EP1_CAN_MAP_READ (1 << 4)
#define ZX_IOB_EP1_CAN_MAP_WRITE (1 << 5)
#define ZX_IOB_EP1_CAN_MEDIATED_READ (1 << 6)
#define ZX_IOB_EP1_CAN_MEDIATED_WRITE (1 << 7)

__END_CDECLS

#endif  // ZIRCON_SYSCALLS_IOB_H_