src/devices/bus/drivers/platform/test/test-bti.cc

// 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.

#include <fuchsia/hardware/btitest/llcpp/fidl.h>
#include <lib/device-protocol/pdev.h>

#include <memory>

#include <ddk/debug.h>
#include <ddk/driver.h>
#include <ddk/platform-defs.h>
#include <ddktl/device.h>
#include <ddktl/fidl.h>

#include "src/devices/bus/drivers/platform/test/test-bti-bind.h"

namespace {

class TestBti : public ddk::Device<TestBti, ddk::Messageable>,
                public ::llcpp::fuchsia::hardware::btitest::BtiDevice::Interface {
 public:
  explicit TestBti(zx_device_t* parent) : ddk::Device<TestBti, ddk::Messageable>(parent) {}

  static zx_status_t Create(void*, zx_device_t* parent);

  void DdkRelease() { delete this; }
  zx_status_t DdkMessage(fidl_incoming_msg_t* msg, fidl_txn_t* txn);

  void GetKoid(GetKoidCompleter::Sync& completer);
  void Crash(CrashCompleter::Sync&) { __builtin_abort(); }
};

zx_status_t TestBti::Create(void*, zx_device_t* parent) {
  auto device = std::make_unique<TestBti>(parent);

  zx_status_t status = device->DdkAdd("test-bti");
  if (status != ZX_OK) {
    zxlogf(ERROR, "DdkAdd failed: %d", status);
    return status;
  }
  __UNUSED auto dummy = device.release();

  return ZX_OK;
}

zx_status_t TestBti::DdkMessage(fidl_incoming_msg_t* msg, fidl_txn_t* txn) {
  DdkTransaction transaction(txn);
  ::llcpp::fuchsia::hardware::btitest::BtiDevice::Dispatch(this, msg, &transaction);
  return transaction.Status();
}

void TestBti::GetKoid(GetKoidCompleter::Sync& completer) {
  ddk::PDev pdev(parent());
  if (!pdev.is_valid()) {
    completer.Close(ZX_ERR_INTERNAL);
    return;
  }
  zx::bti bti;
  zx_status_t status = pdev.GetBti(0, &bti);
  if (status != ZX_OK) {
    completer.Close(status);
    return;
  }

  zx_info_handle_basic_t info;
  status = bti.get_info(ZX_INFO_HANDLE_BASIC, &info, sizeof(info), nullptr, nullptr);
  if (status != ZX_OK) {
    completer.Close(status);
    return;
  }

  completer.Reply(info.koid);
}

static zx_driver_ops_t test_driver_ops = {
    .version = DRIVER_OPS_VERSION,
    .bind = TestBti::Create,
};

}  // namespace

ZIRCON_DRIVER(test_bti, test_driver_ops, "zircon", "0.1");