| /** @file | |
| Private definitions of the VirtioRng RNG driver | |
| Copyright (C) 2016, Linaro Ltd. | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #pragma once | |
| #include <Protocol/ComponentName.h> | |
| #include <Protocol/DriverBinding.h> | |
| #include <Protocol/Rng.h> | |
| #include <IndustryStandard/Virtio.h> | |
| #define VIRTIO_RNG_SIG SIGNATURE_32 ('V', 'R', 'N', 'G') | |
| typedef struct { | |
| // | |
| // Parts of this structure are initialized / torn down in various functions | |
| // at various call depths. The table to the right should make it easier to | |
| // track them. | |
| // | |
| // field init function init depth | |
| // ---------------- ------------------ ---------- | |
| UINT32 Signature; // DriverBindingStart 0 | |
| VIRTIO_DEVICE_PROTOCOL *VirtIo; // DriverBindingStart 0 | |
| EFI_EVENT ExitBoot; // DriverBindingStart 0 | |
| VRING Ring; // VirtioRingInit 2 | |
| EFI_RNG_PROTOCOL Rng; // VirtioRngInit 1 | |
| VOID *RingMap; // VirtioRingMap 2 | |
| BOOLEAN Ready; | |
| } VIRTIO_RNG_DEV; | |
| #define VIRTIO_ENTROPY_SOURCE_FROM_RNG(RngPointer) \ | |
| CR (RngPointer, VIRTIO_RNG_DEV, Rng, VIRTIO_RNG_SIG) |