| // Copyright 2017 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 "garnet/lib/machina/virtio_block.h" |
| |
| #include <lib/svc/cpp/services.h> |
| |
| #include "garnet/lib/machina/device/block.h" |
| |
| namespace machina { |
| |
| static constexpr char kVirtioBlockUrl[] = "virtio_block"; |
| |
| static bool read_only(fuchsia::guest::BlockMode mode) { |
| return mode == fuchsia::guest::BlockMode::READ_ONLY; |
| } |
| |
| VirtioBlock::VirtioBlock(fuchsia::guest::BlockMode mode, |
| const PhysMem& phys_mem) |
| : VirtioComponentDevice( |
| phys_mem, |
| // From Virtio 1.0, Section 5.2.5.2: Devices SHOULD always offer |
| // VIRTIO_BLK_F_FLUSH. |
| // |
| // VIRTIO_BLK_F_BLK_SIZE is required by Zircon guests. |
| VIRTIO_BLK_F_FLUSH | VIRTIO_BLK_F_BLK_SIZE | |
| (read_only(mode) ? VIRTIO_BLK_F_RO : 0), |
| fit::bind_member(this, &VirtioBlock::ConfigureQueue), |
| fit::bind_member(this, &VirtioBlock::Ready)), |
| mode_(mode) {} |
| |
| zx_status_t VirtioBlock::Start(const zx::guest& guest, const std::string& id, |
| fuchsia::guest::BlockFormat format, |
| fuchsia::io::FilePtr file, |
| fuchsia::sys::Launcher* launcher, |
| async_dispatcher_t* dispatcher) { |
| component::Services services; |
| fuchsia::sys::LaunchInfo launch_info{ |
| .url = kVirtioBlockUrl, |
| .directory_request = services.NewRequest(), |
| }; |
| launcher->CreateComponent(std::move(launch_info), controller_.NewRequest()); |
| services.ConnectToService(block_.NewRequest()); |
| |
| fuchsia::guest::device::StartInfo start_info; |
| zx_status_t status = PrepStart(guest, dispatcher, &start_info); |
| if (status != ZX_OK) { |
| return status; |
| } |
| uint64_t size; |
| status = block_->Start(std::move(start_info), id, mode_, format, |
| std::move(file), &size); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| std::lock_guard<std::mutex> lock(device_config_.mutex); |
| config_.capacity = size / kBlockSectorSize; |
| config_.blk_size = kBlockSectorSize; |
| return ZX_OK; |
| } |
| |
| zx_status_t VirtioBlock::ConfigureQueue(uint16_t queue, uint16_t size, |
| zx_gpaddr_t desc, zx_gpaddr_t avail, |
| zx_gpaddr_t used) { |
| return block_->ConfigureQueue(queue, size, desc, avail, used); |
| } |
| |
| zx_status_t VirtioBlock::Ready(uint32_t negotiated_features) { |
| return block_->Ready(negotiated_features); |
| } |
| |
| } // namespace machina |