| // Copyright 2018 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 GARNET_LIB_MACHINA_VIRTIO_RNG_H_ |
| #define GARNET_LIB_MACHINA_VIRTIO_RNG_H_ |
| |
| #include <fuchsia/guest/device/cpp/fidl.h> |
| #include <fuchsia/sys/cpp/fidl.h> |
| #include <virtio/virtio_ids.h> |
| |
| #include "garnet/lib/machina/virtio_device.h" |
| |
| namespace machina { |
| |
| static constexpr uint16_t kVirtioRngNumQueues = 1; |
| |
| // virtio-rng has no configuration. |
| struct virtio_rng_config_t {}; |
| |
| class VirtioRng |
| : public VirtioComponentDevice<VIRTIO_ID_RNG, kVirtioRngNumQueues, |
| virtio_rng_config_t> { |
| public: |
| explicit VirtioRng(const PhysMem& phys_mem); |
| |
| zx_status_t Start(const zx::guest& guest, fuchsia::sys::Launcher* launcher, |
| async_dispatcher_t* dispatcher); |
| |
| private: |
| fuchsia::sys::ComponentControllerPtr controller_; |
| // Use a sync pointer for consistency of virtual machine execution. |
| fuchsia::guest::device::VirtioRngSyncPtr rng_; |
| |
| zx_status_t ConfigureQueue(uint16_t queue, uint16_t size, zx_gpaddr_t desc, |
| zx_gpaddr_t avail, zx_gpaddr_t used); |
| zx_status_t Ready(uint32_t negotiated_features); |
| }; |
| |
| } // namespace machina |
| |
| #endif // GARNET_LIB_MACHINA_VIRTIO_RNG_H_ |