zircon/vdso/msi.fidl

// Copyright 2020 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.

library zx;

[Transport = "Syscall"]
protocol msi {
    /// Allocate Message-Signaled Interrupts (MSIs).
    /// Rights: handle must have resource kind ZX_RSRC_KIND_ROOT.
    msi_allocate(handle:RESOURCE handle, uint32 count)
        -> (status status, handle out_allocation);

    /// Create an Interrupt object from a Messaged-Signaled Interrupt (MSI) allocation.
    /// Rights: handle must be of type ZX_OBJ_TYPE_MSI.
    /// Rights: vmo must be of type ZX_OBJ_TYPE_VMO.
    /// Rights: vmo must have ZX_RIGHT_MAP.
    msi_create(handle handle, uint32 options, uint32 msi_id, handle:VMO vmo, usize vmo_offset)
        -> (status status, handle out_interrupt);
};