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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "device/usb/usb_device_handle_usbfs.h" | |
| 6 | |
| 7 #if defined(OS_ANDROID) && __ANDROID_API__ < 21 | |
| 8 #include <linux/usb_ch9.h> | |
| 9 #else | |
| 10 #include <linux/usb/ch9.h> | |
| 11 #endif | |
| 12 | |
| 13 #include <linux/usbdevice_fs.h> | |
| 14 #include <sys/ioctl.h> | |
| 15 | |
| 16 #include <numeric> | |
| 17 | |
| 18 #include "base/bind.h" | |
| 19 #include "base/cancelable_callback.h" | |
| 20 #include "base/logging.h" | |
| 21 #include "base/message_loop/message_loop.h" | |
| 22 #include "base/message_loop/message_pump_libevent.h" | |
| 23 #include "base/posix/eintr_wrapper.h" | |
| 24 #include "base/stl_util.h" | |
| 25 #include "base/thread_task_runner_handle.h" | |
| 26 #include "base/threading/thread_restrictions.h" | |
| 27 #include "components/device_event_log/device_event_log.h" | |
| 28 #include "device/usb/usb_device_impl.h" | |
| 29 #include "net/base/io_buffer.h" | |
| 30 | |
| 31 namespace device { | |
| 32 | |
| 33 namespace { | |
| 34 | |
| 35 uint8_t ConvertEndpointDirection(UsbEndpointDirection direction) { | |
| 36 switch (direction) { | |
| 37 case USB_DIRECTION_INBOUND: | |
| 38 return USB_DIR_IN; | |
| 39 case USB_DIRECTION_OUTBOUND: | |
| 40 return USB_DIR_OUT; | |
| 41 } | |
| 42 NOTREACHED(); | |
| 43 return 0; | |
| 44 } | |
| 45 | |
| 46 uint8_t ConvertRequestType(UsbDeviceHandle::TransferRequestType request_type) { | |
| 47 switch (request_type) { | |
| 48 case UsbDeviceHandle::STANDARD: | |
| 49 return USB_TYPE_STANDARD; | |
| 50 case UsbDeviceHandle::CLASS: | |
| 51 return USB_TYPE_CLASS; | |
| 52 case UsbDeviceHandle::VENDOR: | |
| 53 return USB_TYPE_VENDOR; | |
| 54 case UsbDeviceHandle::RESERVED: | |
| 55 return USB_TYPE_RESERVED; | |
| 56 } | |
| 57 NOTREACHED(); | |
| 58 return 0; | |
| 59 } | |
| 60 | |
| 61 uint8_t ConvertRecipient(UsbDeviceHandle::TransferRecipient recipient) { | |
| 62 switch (recipient) { | |
| 63 case UsbDeviceHandle::DEVICE: | |
| 64 return USB_RECIP_DEVICE; | |
| 65 case UsbDeviceHandle::INTERFACE: | |
| 66 return USB_RECIP_INTERFACE; | |
| 67 case UsbDeviceHandle::ENDPOINT: | |
| 68 return USB_RECIP_ENDPOINT; | |
| 69 case UsbDeviceHandle::OTHER: | |
| 70 return USB_RECIP_OTHER; | |
| 71 } | |
| 72 NOTREACHED(); | |
| 73 return 0; | |
| 74 } | |
| 75 | |
| 76 scoped_refptr<net::IOBuffer> BuildControlTransferBuffer( | |
| 77 UsbEndpointDirection direction, | |
| 78 UsbDeviceHandle::TransferRequestType request_type, | |
| 79 UsbDeviceHandle::TransferRecipient recipient, | |
| 80 uint8_t request, | |
| 81 uint16_t value, | |
| 82 uint16_t index, | |
| 83 scoped_refptr<net::IOBuffer> original_buffer, | |
| 84 size_t length) { | |
| 85 scoped_refptr<net::IOBuffer> new_buffer( | |
| 86 new net::IOBuffer(length + sizeof(usb_ctrlrequest))); | |
| 87 usb_ctrlrequest* setup = | |
| 88 reinterpret_cast<usb_ctrlrequest*>(new_buffer->data()); | |
| 89 setup->bRequestType = ConvertEndpointDirection(direction) | | |
| 90 ConvertRequestType(request_type) | | |
| 91 ConvertRecipient(recipient); | |
| 92 setup->bRequest = request; | |
| 93 setup->wValue = value; | |
| 94 setup->wIndex = index; | |
| 95 setup->wLength = length; | |
| 96 memcpy(new_buffer->data() + sizeof(usb_ctrlrequest), original_buffer->data(), | |
| 97 length); | |
| 98 return new_buffer; | |
| 99 } | |
| 100 | |
| 101 uint8_t ConvertTransferType(UsbTransferType type) { | |
| 102 switch (type) { | |
| 103 case USB_TRANSFER_CONTROL: | |
| 104 return USBDEVFS_URB_TYPE_CONTROL; | |
| 105 case USB_TRANSFER_ISOCHRONOUS: | |
| 106 return USBDEVFS_URB_TYPE_ISO; | |
| 107 case USB_TRANSFER_BULK: | |
| 108 return USBDEVFS_URB_TYPE_BULK; | |
| 109 case USB_TRANSFER_INTERRUPT: | |
| 110 return USBDEVFS_URB_TYPE_INTERRUPT; | |
| 111 } | |
| 112 NOTREACHED(); | |
| 113 return 0; | |
| 114 } | |
| 115 | |
| 116 UsbTransferStatus ConvertTransferResult(int rc) { | |
| 117 switch (rc) { | |
| 118 case 0: | |
| 119 return USB_TRANSFER_COMPLETED; | |
| 120 case EPIPE: | |
| 121 return USB_TRANSFER_STALLED; | |
| 122 case ENODEV: | |
| 123 case ESHUTDOWN: | |
| 124 return USB_TRANSFER_DISCONNECT; | |
| 125 default: | |
| 126 // TODO(reillyg): Add a specific error message whenever one of the cases | |
| 127 // above fails to match. | |
| 128 USB_LOG(ERROR) << "Unknown system error: " | |
| 129 << logging::SystemErrorCodeToString(rc); | |
| 130 return USB_TRANSFER_ERROR; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 } // namespace | |
| 135 | |
| 136 class UsbDeviceHandleUsbfs::FileThreadHelper | |
| 137 : public base::MessagePumpLibevent::Watcher, | |
| 138 public base::MessageLoop::DestructionObserver { | |
| 139 public: | |
| 140 FileThreadHelper(int fd, | |
| 141 scoped_refptr<UsbDeviceHandleUsbfs> device_handle, | |
| 142 scoped_refptr<base::SequencedTaskRunner> task_runner); | |
| 143 ~FileThreadHelper() override; | |
| 144 | |
| 145 static void Start(scoped_ptr<FileThreadHelper> self); | |
| 146 | |
| 147 // base::MessagePumpLibevent::Watcher overrides. | |
| 148 void OnFileCanReadWithoutBlocking(int fd) override; | |
| 149 void OnFileCanWriteWithoutBlocking(int fd) override; | |
| 150 | |
| 151 // base::MessageLoop::DestructionObserver overrides. | |
| 152 void WillDestroyCurrentMessageLoop() override; | |
| 153 | |
| 154 private: | |
| 155 int fd_; | |
| 156 scoped_refptr<UsbDeviceHandleUsbfs> device_handle_; | |
| 157 scoped_refptr<base::SequencedTaskRunner> task_runner_; | |
| 158 base::MessagePumpLibevent::FileDescriptorWatcher file_watcher_; | |
| 159 base::ThreadChecker thread_checker_; | |
| 160 | |
| 161 DISALLOW_COPY_AND_ASSIGN(FileThreadHelper); | |
| 162 }; | |
| 163 | |
| 164 UsbDeviceHandleUsbfs::FileThreadHelper::FileThreadHelper( | |
| 165 int fd, | |
| 166 scoped_refptr<UsbDeviceHandleUsbfs> device_handle, | |
| 167 scoped_refptr<base::SequencedTaskRunner> task_runner) | |
| 168 : fd_(fd), device_handle_(device_handle), task_runner_(task_runner) {} | |
| 169 | |
| 170 UsbDeviceHandleUsbfs::FileThreadHelper::~FileThreadHelper() { | |
| 171 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 172 base::MessageLoop::current()->RemoveDestructionObserver(this); | |
| 173 } | |
| 174 | |
| 175 // static | |
| 176 void UsbDeviceHandleUsbfs::FileThreadHelper::Start( | |
| 177 scoped_ptr<FileThreadHelper> self) { | |
| 178 base::ThreadRestrictions::AssertIOAllowed(); | |
| 179 self->thread_checker_.DetachFromThread(); | |
| 180 | |
| 181 // Linux indicates that URBs are available to reap by marking the file | |
| 182 // descriptor writable. | |
| 183 if (!base::MessageLoopForIO::current()->WatchFileDescriptor( | |
| 184 self->fd_, true, base::MessageLoopForIO::WATCH_WRITE, | |
| 185 &self->file_watcher_, self.get())) { | |
| 186 USB_LOG(ERROR) << "Failed to start watching device file descriptor."; | |
| 187 } | |
| 188 | |
| 189 // |self| is now owned by the current message loop. | |
| 190 base::MessageLoop::current()->AddDestructionObserver(self.release()); | |
| 191 } | |
| 192 | |
| 193 void UsbDeviceHandleUsbfs::FileThreadHelper::OnFileCanReadWithoutBlocking( | |
| 194 int fd) { | |
| 195 NOTREACHED(); // Only listening for writability. | |
| 196 } | |
| 197 | |
| 198 void UsbDeviceHandleUsbfs::FileThreadHelper::OnFileCanWriteWithoutBlocking( | |
| 199 int fd) { | |
| 200 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 201 DCHECK_EQ(fd_, fd); | |
| 202 | |
| 203 const size_t MAX_URBS_PER_EVENT = 10; | |
| 204 std::vector<usbdevfs_urb*> urbs; | |
| 205 urbs.reserve(MAX_URBS_PER_EVENT); | |
| 206 for (size_t i = 0; i < MAX_URBS_PER_EVENT; ++i) { | |
| 207 usbdevfs_urb* urb; | |
| 208 int rc = HANDLE_EINTR(ioctl(fd_, USBDEVFS_REAPURBNDELAY, &urb)); | |
| 209 if (rc) { | |
| 210 if (errno == EAGAIN) | |
| 211 break; | |
| 212 USB_PLOG(DEBUG) << "Failed to reap urbs"; | |
| 213 } else { | |
| 214 urbs.push_back(urb); | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 task_runner_->PostTask( | |
| 219 FROM_HERE, | |
| 220 base::Bind(&UsbDeviceHandleUsbfs::ReapedUrbs, device_handle_, urbs)); | |
| 221 } | |
| 222 | |
| 223 void UsbDeviceHandleUsbfs::FileThreadHelper::WillDestroyCurrentMessageLoop() { | |
| 224 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 225 delete this; | |
| 226 } | |
| 227 | |
| 228 struct UsbDeviceHandleUsbfs::Transfer { | |
| 229 Transfer() = delete; | |
| 230 Transfer(scoped_refptr<net::IOBuffer> buffer, | |
| 231 const TransferCallback& callback); | |
| 232 Transfer(scoped_refptr<net::IOBuffer> buffer, | |
| 233 const IsochronousTransferCallback& callback); | |
| 234 ~Transfer(); | |
| 235 | |
| 236 void* operator new(std::size_t size, size_t number_of_iso_packets); | |
| 237 | |
| 238 scoped_refptr<net::IOBuffer> control_transfer_buffer; | |
| 239 scoped_refptr<net::IOBuffer> buffer; | |
| 240 TransferCallback callback; | |
| 241 IsochronousTransferCallback isoc_callback; | |
| 242 base::CancelableClosure timeout_closure; | |
| 243 bool timed_out = false; | |
| 244 | |
| 245 // The |urb| field must be the last in the struct so that the extra space | |
| 246 // allocated by the overridden new function above extends the length of its | |
| 247 // |iso_frame_desc| field. | |
| 248 usbdevfs_urb urb; | |
| 249 | |
| 250 private: | |
| 251 DISALLOW_COPY_AND_ASSIGN(Transfer); | |
| 252 }; | |
| 253 | |
| 254 UsbDeviceHandleUsbfs::Transfer::Transfer(scoped_refptr<net::IOBuffer> buffer, | |
| 255 const TransferCallback& callback) | |
| 256 : buffer(buffer), callback(callback) { | |
| 257 memset(&urb, 0, sizeof(urb)); | |
| 258 urb.usercontext = this; | |
| 259 urb.buffer = buffer->data(); | |
| 260 } | |
| 261 | |
| 262 UsbDeviceHandleUsbfs::Transfer::Transfer( | |
| 263 scoped_refptr<net::IOBuffer> buffer, | |
| 264 const IsochronousTransferCallback& callback) | |
| 265 : buffer(buffer), isoc_callback(callback) { | |
| 266 memset(&urb, 0, sizeof(urb) + | |
| 267 sizeof(usbdevfs_iso_packet_desc) * urb.number_of_packets); | |
| 268 urb.usercontext = this; | |
| 269 urb.buffer = buffer->data(); | |
| 270 } | |
| 271 | |
| 272 UsbDeviceHandleUsbfs::Transfer::~Transfer() = default; | |
| 273 | |
| 274 void* UsbDeviceHandleUsbfs::Transfer::operator new( | |
| 275 std::size_t size, | |
| 276 size_t number_of_iso_packets) { | |
| 277 void* p = ::operator new( | |
| 278 size + sizeof(usbdevfs_iso_packet_desc) * number_of_iso_packets); | |
| 279 Transfer* transfer = static_cast<Transfer*>(p); | |
| 280 transfer->urb.number_of_packets = number_of_iso_packets; | |
| 281 return p; | |
| 282 } | |
| 283 | |
| 284 UsbDeviceHandleUsbfs::UsbDeviceHandleUsbfs( | |
| 285 scoped_refptr<UsbDevice> device, | |
| 286 base::ScopedFD fd, | |
| 287 scoped_refptr<base::SequencedTaskRunner> blocking_task_runner) | |
| 288 : device_(device), | |
| 289 fd_(std::move(fd)), | |
| 290 blocking_task_runner_(blocking_task_runner) { | |
| 291 DCHECK(device_); | |
| 292 DCHECK(fd_.is_valid()); | |
| 293 DCHECK(blocking_task_runner_); | |
| 294 | |
| 295 task_runner_ = base::ThreadTaskRunnerHandle::Get(); | |
| 296 | |
| 297 scoped_ptr<FileThreadHelper> helper( | |
| 298 new FileThreadHelper(fd_.get(), this, task_runner_)); | |
| 299 helper_ = helper.get(); | |
| 300 blocking_task_runner_->PostTask( | |
| 301 FROM_HERE, base::Bind(&FileThreadHelper::Start, base::Passed(&helper))); | |
| 302 } | |
| 303 | |
| 304 scoped_refptr<UsbDevice> UsbDeviceHandleUsbfs::GetDevice() const { | |
| 305 return device_; | |
| 306 } | |
| 307 | |
| 308 void UsbDeviceHandleUsbfs::Close() { | |
| 309 // On the |task_runner_| thread check |device_| to see if the handle is | |
| 310 // closed. On the |blocking_task_runner_| thread check |fd_.is_valid()| to | |
| 311 // see if the handle is closed. | |
| 312 DCHECK(device_); | |
| 313 #if !defined(OS_ANDROID) | |
| 314 static_cast<UsbDeviceImpl*>(device_.get())->HandleClosed(this); | |
| 315 #endif | |
| 316 device_ = nullptr; | |
| 317 blocking_task_runner_->PostTask( | |
| 318 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::CloseBlocking, this)); | |
| 319 } | |
| 320 | |
| 321 void UsbDeviceHandleUsbfs::SetConfiguration(int configuration_value, | |
| 322 const ResultCallback& callback) { | |
| 323 // USBDEVFS_SETCONFIGURATION synchronously issues a SET_CONFIGURATION request | |
| 324 // to the device so it must be performed on a thread where it is okay to | |
| 325 // block. | |
| 326 blocking_task_runner_->PostTask( | |
| 327 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::SetConfigurationBlocking, | |
| 328 this, configuration_value, callback)); | |
| 329 } | |
| 330 | |
| 331 void UsbDeviceHandleUsbfs::ClaimInterface(int interface_number, | |
| 332 const ResultCallback& callback) { | |
| 333 if (!device_) { | |
| 334 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 335 return; | |
| 336 } | |
| 337 | |
| 338 if (ContainsKey(interfaces_, interface_number)) { | |
| 339 USB_LOG(DEBUG) << "Interface " << interface_number << " already claimed."; | |
| 340 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 341 return; | |
| 342 } | |
| 343 | |
| 344 // It appears safe to assume that this ioctl will not block. | |
| 345 int rc = HANDLE_EINTR( | |
| 346 ioctl(fd_.get(), USBDEVFS_CLAIMINTERFACE, &interface_number)); | |
| 347 if (rc) { | |
| 348 USB_PLOG(DEBUG) << "Failed to claim interface " << interface_number; | |
| 349 } else { | |
| 350 interfaces_[interface_number].alternate_setting = 0; | |
| 351 RefreshEndpointInfo(); | |
| 352 } | |
| 353 task_runner_->PostTask(FROM_HERE, base::Bind(callback, rc == 0)); | |
| 354 } | |
| 355 | |
| 356 void UsbDeviceHandleUsbfs::ReleaseInterface(int interface_number, | |
| 357 const ResultCallback& callback) { | |
| 358 // USBDEVFS_RELEASEINTERFACE may issue a SET_INTERFACE request to the | |
| 359 // device to restore alternate setting 0 so it must be performed on a thread | |
| 360 // where it is okay to block. | |
| 361 blocking_task_runner_->PostTask( | |
| 362 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::ReleaseInterfaceBlocking, | |
| 363 this, interface_number, callback)); | |
| 364 } | |
| 365 | |
| 366 void UsbDeviceHandleUsbfs::SetInterfaceAlternateSetting( | |
| 367 int interface_number, | |
| 368 int alternate_setting, | |
| 369 const ResultCallback& callback) { | |
| 370 // USBDEVFS_SETINTERFACE is synchronous because it issues a SET_INTERFACE | |
| 371 // request to the device so it must be performed on a thread where it is okay | |
| 372 // to block. | |
| 373 blocking_task_runner_->PostTask( | |
| 374 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::SetInterfaceBlocking, this, | |
| 375 interface_number, alternate_setting, callback)); | |
| 376 } | |
| 377 | |
| 378 void UsbDeviceHandleUsbfs::ResetDevice(const ResultCallback& callback) { | |
| 379 // USBDEVFS_RESET is synchronous because it waits for the port to be reset | |
| 380 // and the device re-enumerated so it must be performed on a thread where it | |
| 381 // is okay to block. | |
| 382 blocking_task_runner_->PostTask( | |
| 383 FROM_HERE, | |
| 384 base::Bind(&UsbDeviceHandleUsbfs::ResetDeviceBlocking, this, callback)); | |
| 385 } | |
| 386 | |
| 387 void UsbDeviceHandleUsbfs::ClearHalt(uint8_t endpoint_address, | |
| 388 const ResultCallback& callback) { | |
| 389 // USBDEVFS_CLEAR_HALT is synchronous because it issues a CLEAR_FEATURE | |
| 390 // request to the device so it must be performed on a thread where it is okay | |
| 391 // to block. | |
| 392 blocking_task_runner_->PostTask( | |
| 393 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::ClearHaltBlocking, this, | |
| 394 endpoint_address, callback)); | |
| 395 } | |
| 396 | |
| 397 void UsbDeviceHandleUsbfs::ControlTransfer(UsbEndpointDirection direction, | |
| 398 TransferRequestType request_type, | |
| 399 TransferRecipient recipient, | |
| 400 uint8_t request, | |
| 401 uint16_t value, | |
| 402 uint16_t index, | |
| 403 scoped_refptr<net::IOBuffer> buffer, | |
| 404 size_t length, | |
| 405 unsigned int timeout, | |
| 406 const TransferCallback& callback) { | |
| 407 if (!device_) { | |
| 408 task_runner_->PostTask( | |
| 409 FROM_HERE, base::Bind(callback, USB_TRANSFER_DISCONNECT, nullptr, 0)); | |
| 410 return; | |
| 411 } | |
| 412 | |
| 413 scoped_ptr<Transfer> transfer(new (0) Transfer(buffer, callback)); | |
| 414 transfer->control_transfer_buffer = | |
| 415 BuildControlTransferBuffer(direction, request_type, recipient, request, | |
| 416 value, index, buffer, length); | |
| 417 transfer->urb.type = USBDEVFS_URB_TYPE_CONTROL; | |
| 418 transfer->urb.endpoint = 0; | |
| 419 transfer->urb.buffer = transfer->control_transfer_buffer->data(); | |
| 420 transfer->urb.buffer_length = 8 + length; | |
| 421 | |
| 422 // USBDEVFS_SUBMITURB appears to be non-blocking as completion is reported | |
| 423 // by USBDEVFS_REAPURBNDELAY. | |
| 424 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_SUBMITURB, &transfer->urb)); | |
| 425 if (rc) { | |
| 426 rc = logging::GetLastSystemErrorCode(); | |
| 427 USB_PLOG(DEBUG) << "Failed to submit control transfer"; | |
| 428 task_runner_->PostTask( | |
| 429 FROM_HERE, base::Bind(callback, ConvertTransferResult(rc), nullptr, 0)); | |
| 430 } else { | |
| 431 SetUpTimeoutCallback(transfer.get(), timeout); | |
| 432 transfers_.push_back(std::move(transfer)); | |
| 433 } | |
| 434 } | |
| 435 | |
| 436 void UsbDeviceHandleUsbfs::IsochronousTransferIn( | |
| 437 uint8_t endpoint_number, | |
| 438 const std::vector<uint32_t>& packet_lengths, | |
| 439 unsigned int timeout, | |
| 440 const IsochronousTransferCallback& callback) { | |
| 441 uint8_t endpoint_address = USB_DIR_IN | endpoint_number; | |
| 442 size_t total_length = | |
| 443 std::accumulate(packet_lengths.begin(), packet_lengths.end(), 0u); | |
| 444 IsochronousTransferInternal(endpoint_address, new net::IOBuffer(total_length), | |
| 445 total_length, packet_lengths, timeout, callback); | |
| 446 } | |
| 447 | |
| 448 void UsbDeviceHandleUsbfs::IsochronousTransferOut( | |
| 449 uint8_t endpoint_number, | |
| 450 scoped_refptr<net::IOBuffer> buffer, | |
| 451 const std::vector<uint32_t>& packet_lengths, | |
| 452 unsigned int timeout, | |
| 453 const IsochronousTransferCallback& callback) { | |
| 454 uint8_t endpoint_address = USB_DIR_OUT | endpoint_number; | |
| 455 size_t total_length = | |
| 456 std::accumulate(packet_lengths.begin(), packet_lengths.end(), 0u); | |
| 457 IsochronousTransferInternal(endpoint_address, buffer, total_length, | |
| 458 packet_lengths, timeout, callback); | |
| 459 } | |
| 460 | |
| 461 void UsbDeviceHandleUsbfs::GenericTransfer(UsbEndpointDirection direction, | |
| 462 uint8_t endpoint_number, | |
| 463 scoped_refptr<net::IOBuffer> buffer, | |
| 464 size_t length, | |
| 465 unsigned int timeout, | |
| 466 const TransferCallback& callback) { | |
| 467 if (!device_) { | |
| 468 task_runner_->PostTask( | |
| 469 FROM_HERE, base::Bind(callback, USB_TRANSFER_DISCONNECT, nullptr, 0)); | |
| 470 return; | |
| 471 } | |
| 472 | |
| 473 uint8_t endpoint_address = | |
| 474 ConvertEndpointDirection(direction) | endpoint_number; | |
| 475 auto it = endpoints_.find(endpoint_address); | |
| 476 if (it == endpoints_.end()) { | |
| 477 USB_LOG(USER) << "Endpoint address " << static_cast<int>(endpoint_address) | |
| 478 << " is not part of a claimed interface."; | |
| 479 task_runner_->PostTask( | |
| 480 FROM_HERE, base::Bind(callback, USB_TRANSFER_ERROR, nullptr, 0)); | |
| 481 return; | |
| 482 } | |
| 483 | |
| 484 scoped_ptr<Transfer> transfer(new (0) Transfer(buffer, callback)); | |
| 485 transfer->urb.endpoint = endpoint_address; | |
| 486 transfer->urb.buffer_length = length; | |
| 487 transfer->urb.type = ConvertTransferType(it->second.type); | |
| 488 | |
| 489 // USBDEVFS_SUBMITURB appears to be non-blocking as completion is reported | |
| 490 // by USBDEVFS_REAPURBNDELAY. This code assumes a recent kernel that can | |
| 491 // accept arbitrarily large transfer requests, hopefully also using a scatter- | |
| 492 // gather list. | |
| 493 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_SUBMITURB, &transfer->urb)); | |
| 494 if (rc) { | |
| 495 rc = logging::GetLastSystemErrorCode(); | |
| 496 USB_PLOG(DEBUG) << "Failed to submit transfer"; | |
| 497 task_runner_->PostTask( | |
| 498 FROM_HERE, base::Bind(callback, ConvertTransferResult(rc), nullptr, 0)); | |
| 499 } else { | |
| 500 SetUpTimeoutCallback(transfer.get(), timeout); | |
| 501 transfers_.push_back(std::move(transfer)); | |
| 502 } | |
| 503 } | |
| 504 | |
| 505 const UsbInterfaceDescriptor* UsbDeviceHandleUsbfs::FindInterfaceByEndpoint( | |
| 506 uint8_t endpoint_address) { | |
| 507 auto it = endpoints_.find(endpoint_address); | |
| 508 if (it != endpoints_.end()) | |
| 509 return it->second.interface; | |
| 510 return nullptr; | |
| 511 } | |
| 512 | |
| 513 UsbDeviceHandleUsbfs::~UsbDeviceHandleUsbfs() { | |
| 514 DCHECK(!device_) << "Handle must be closed before it is destroyed."; | |
| 515 } | |
| 516 | |
| 517 void UsbDeviceHandleUsbfs::CloseBlocking() { | |
| 518 fd_.reset(-1); | |
| 519 delete helper_; | |
| 520 } | |
| 521 | |
| 522 void UsbDeviceHandleUsbfs::SetConfigurationBlocking( | |
| 523 int configuration_value, | |
| 524 const ResultCallback& callback) { | |
| 525 if (!fd_.is_valid()) { | |
| 526 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 527 return; | |
| 528 } | |
| 529 | |
| 530 int rc = HANDLE_EINTR( | |
| 531 ioctl(fd_.get(), USBDEVFS_SETCONFIGURATION, &configuration_value)); | |
| 532 if (rc) | |
| 533 USB_PLOG(DEBUG) << "Failed to set configuration " << configuration_value; | |
| 534 task_runner_->PostTask( | |
| 535 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::SetConfigurationComplete, | |
| 536 this, configuration_value, rc == 0, callback)); | |
| 537 } | |
| 538 | |
| 539 void UsbDeviceHandleUsbfs::SetConfigurationComplete( | |
| 540 int configuration_value, | |
| 541 bool success, | |
| 542 const ResultCallback& callback) { | |
| 543 if (success && device_) { | |
| 544 #if !defined(OS_ANDROID) | |
| 545 static_cast<UsbDeviceImpl*>(device_.get()) | |
| 546 ->ActiveConfigurationChanged(configuration_value); | |
| 547 #endif | |
| 548 // TODO(reillyg): If all interfaces are unclaimed before a new configuration | |
| 549 // is set then this will do nothing. Investigate. | |
| 550 RefreshEndpointInfo(); | |
| 551 } | |
| 552 callback.Run(success); | |
| 553 } | |
| 554 | |
| 555 void UsbDeviceHandleUsbfs::ReleaseInterfaceBlocking( | |
| 556 int interface_number, | |
| 557 const ResultCallback& callback) { | |
| 558 if (!fd_.is_valid()) { | |
| 559 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 560 return; | |
| 561 } | |
| 562 | |
| 563 int rc = HANDLE_EINTR( | |
| 564 ioctl(fd_.get(), USBDEVFS_RELEASEINTERFACE, &interface_number)); | |
| 565 if (rc) { | |
| 566 USB_PLOG(DEBUG) << "Failed to release interface " << interface_number; | |
| 567 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 568 } else { | |
| 569 task_runner_->PostTask( | |
| 570 FROM_HERE, base::Bind(&UsbDeviceHandleUsbfs::ReleaseInterfaceComplete, | |
| 571 this, interface_number, callback)); | |
| 572 } | |
| 573 } | |
| 574 | |
| 575 void UsbDeviceHandleUsbfs::ReleaseInterfaceComplete( | |
| 576 int interface_number, | |
| 577 const ResultCallback& callback) { | |
| 578 auto it = interfaces_.find(interface_number); | |
| 579 DCHECK(it != interfaces_.end()); | |
| 580 interfaces_.erase(it); | |
| 581 RefreshEndpointInfo(); | |
| 582 callback.Run(true); | |
| 583 } | |
| 584 | |
| 585 void UsbDeviceHandleUsbfs::SetInterfaceBlocking( | |
| 586 int interface_number, | |
| 587 int alternate_setting, | |
| 588 const ResultCallback& callback) { | |
| 589 if (!fd_.is_valid()) { | |
| 590 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 591 return; | |
| 592 } | |
| 593 | |
| 594 usbdevfs_setinterface cmd = {0}; | |
| 595 cmd.interface = interface_number; | |
| 596 cmd.altsetting = alternate_setting; | |
| 597 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_SETINTERFACE, &cmd)); | |
| 598 if (rc) { | |
| 599 USB_PLOG(DEBUG) << "Failed to set interface " << interface_number | |
| 600 << " to alternate setting " << alternate_setting; | |
| 601 } | |
| 602 task_runner_->PostTask(FROM_HERE, base::Bind(callback, rc == 0)); | |
| 603 } | |
| 604 | |
| 605 void UsbDeviceHandleUsbfs::ResetDeviceBlocking(const ResultCallback& callback) { | |
| 606 if (!fd_.is_valid()) { | |
| 607 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 608 return; | |
| 609 } | |
| 610 | |
| 611 // TODO(reillyg): libusb releases interfaces before and then reclaims | |
| 612 // interfaces after a reset. We should probably do this too or document that | |
| 613 // callers have to call ClaimInterface as well. | |
| 614 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_RESET, nullptr)); | |
| 615 if (rc) | |
| 616 USB_PLOG(DEBUG) << "Failed to reset the device"; | |
| 617 task_runner_->PostTask(FROM_HERE, base::Bind(callback, rc == 0)); | |
| 618 } | |
| 619 | |
| 620 void UsbDeviceHandleUsbfs::ClearHaltBlocking(uint8_t endpoint_address, | |
| 621 const ResultCallback& callback) { | |
| 622 if (!fd_.is_valid()) { | |
| 623 task_runner_->PostTask(FROM_HERE, base::Bind(callback, false)); | |
| 624 return; | |
| 625 } | |
| 626 | |
| 627 int tmp_endpoint = endpoint_address; | |
| 628 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_CLEAR_HALT, &tmp_endpoint)); | |
| 629 if (rc) { | |
| 630 USB_PLOG(DEBUG) << "Failed to clear the stall condition on endpoint " | |
| 631 << static_cast<int>(endpoint_address); | |
| 632 } | |
| 633 task_runner_->PostTask(FROM_HERE, base::Bind(callback, rc == 0)); | |
| 634 } | |
| 635 | |
| 636 void UsbDeviceHandleUsbfs::IsochronousTransferInternal( | |
| 637 uint8_t endpoint_address, | |
| 638 scoped_refptr<net::IOBuffer> buffer, | |
| 639 size_t total_length, | |
| 640 const std::vector<uint32_t>& packet_lengths, | |
| 641 unsigned int timeout, | |
| 642 const IsochronousTransferCallback& callback) { | |
| 643 if (!device_) { | |
| 644 ReportIsochronousError(packet_lengths, callback, USB_TRANSFER_DISCONNECT); | |
| 645 return; | |
| 646 } | |
| 647 | |
| 648 auto it = endpoints_.find(endpoint_address); | |
| 649 if (it == endpoints_.end()) { | |
| 650 USB_LOG(USER) << "Endpoint address " << static_cast<int>(endpoint_address) | |
| 651 << " is not part of a claimed interface."; | |
| 652 ReportIsochronousError(packet_lengths, callback, USB_TRANSFER_ERROR); | |
| 653 return; | |
| 654 } | |
| 655 | |
| 656 scoped_ptr<Transfer> transfer(new (packet_lengths.size()) | |
| 657 Transfer(buffer, callback)); | |
| 658 transfer->urb.type = USBDEVFS_URB_TYPE_ISO; | |
| 659 transfer->urb.endpoint = endpoint_address; | |
| 660 transfer->urb.buffer_length = total_length; | |
| 661 | |
| 662 for (size_t i = 0; i < packet_lengths.size(); ++i) | |
| 663 transfer->urb.iso_frame_desc[i].length = packet_lengths[i]; | |
| 664 | |
| 665 // USBDEVFS_SUBMITURB appears to be non-blocking as completion is reported | |
| 666 // by USBDEVFS_REAPURBNDELAY. This code assumes a recent kernel that can | |
| 667 // accept arbitrarily large transfer requests, hopefully also using a scatter- | |
| 668 // gather list. | |
| 669 int rc = HANDLE_EINTR(ioctl(fd_.get(), USBDEVFS_SUBMITURB, &transfer->urb)); | |
| 670 if (rc) { | |
| 671 rc = logging::GetLastSystemErrorCode(); | |
| 672 USB_PLOG(DEBUG) << "Failed to submit transfer"; | |
| 673 ReportIsochronousError(packet_lengths, callback, ConvertTransferResult(rc)); | |
| 674 } else { | |
| 675 SetUpTimeoutCallback(transfer.get(), timeout); | |
| 676 transfers_.push_back(std::move(transfer)); | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 void UsbDeviceHandleUsbfs::ReapedUrbs(const std::vector<usbdevfs_urb*>& urbs) { | |
| 681 for (const auto& urb : urbs) { | |
| 682 Transfer* this_transfer = static_cast<Transfer*>(urb->usercontext); | |
| 683 DCHECK_EQ(urb, &this_transfer->urb); | |
| 684 auto it = std::find_if( | |
| 685 transfers_.begin(), transfers_.end(), | |
| 686 [this_transfer](const scoped_ptr<Transfer>& transfer) -> bool { | |
| 687 return transfer.get() == this_transfer; | |
| 688 }); | |
| 689 DCHECK(it != transfers_.end()); | |
| 690 scoped_ptr<Transfer> transfer = std::move(*it); | |
| 691 transfers_.erase(it); | |
| 692 TransferComplete(std::move(transfer)); | |
| 693 } | |
| 694 } | |
| 695 | |
| 696 void UsbDeviceHandleUsbfs::TransferComplete(scoped_ptr<Transfer> transfer) { | |
| 697 if (transfer->timed_out) | |
| 698 return; | |
| 699 | |
| 700 // The transfer will soon be freed. Cancel the timeout callback so that the | |
| 701 // raw pointer it holds to |transfer| is not used. | |
| 702 transfer->timeout_closure.Cancel(); | |
| 703 | |
| 704 if (transfer->urb.type == USBDEVFS_URB_TYPE_ISO) { | |
| 705 std::vector<IsochronousPacket> packets(transfer->urb.number_of_packets); | |
| 706 for (size_t i = 0; i < packets.size(); ++i) { | |
| 707 packets[i].length = transfer->urb.iso_frame_desc[i].length; | |
| 708 packets[i].transferred_length = | |
| 709 transfer->urb.iso_frame_desc[i].actual_length; | |
| 710 packets[i].status = ConvertTransferResult( | |
| 711 transfer->urb.status == 0 ? transfer->urb.iso_frame_desc[i].status | |
| 712 : transfer->urb.status); | |
| 713 } | |
| 714 | |
| 715 transfer->isoc_callback.Run(transfer->buffer, packets); | |
| 716 } else { | |
| 717 if (transfer->urb.status == 0 && | |
| 718 transfer->urb.type == USBDEVFS_URB_TYPE_CONTROL) { | |
| 719 // Copy the result of the control transfer back into the original buffer. | |
| 720 memcpy(transfer->buffer->data(), | |
| 721 transfer->control_transfer_buffer->data() + 8, | |
| 722 transfer->urb.actual_length); | |
| 723 } | |
| 724 | |
| 725 transfer->callback.Run(ConvertTransferResult(-transfer->urb.status), | |
| 726 transfer->buffer, transfer->urb.actual_length); | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 void UsbDeviceHandleUsbfs::RefreshEndpointInfo() { | |
| 731 endpoints_.clear(); | |
| 732 | |
| 733 const UsbConfigDescriptor* config = device_->GetActiveConfiguration(); | |
| 734 if (!config) | |
| 735 return; | |
| 736 | |
| 737 for (const auto& entry : interfaces_) { | |
| 738 auto interface_it = std::find_if( | |
| 739 config->interfaces.begin(), config->interfaces.end(), | |
| 740 [entry](const UsbInterfaceDescriptor& interface) { | |
| 741 uint8_t interface_number = entry.first; | |
| 742 uint8_t alternate_setting = entry.second.alternate_setting; | |
| 743 return interface.interface_number == interface_number && | |
| 744 interface.alternate_setting == alternate_setting; | |
| 745 }); | |
| 746 DCHECK(interface_it != config->interfaces.end()); | |
| 747 | |
| 748 for (const auto& endpoint : interface_it->endpoints) { | |
| 749 EndpointInfo& info = endpoints_[endpoint.address]; | |
| 750 info.type = endpoint.transfer_type; | |
| 751 info.interface = &*interface_it; | |
| 752 } | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 void UsbDeviceHandleUsbfs::ReportIsochronousError( | |
| 757 const std::vector<uint32_t>& packet_lengths, | |
| 758 const UsbDeviceHandle::IsochronousTransferCallback& callback, | |
| 759 UsbTransferStatus status) { | |
| 760 std::vector<UsbDeviceHandle::IsochronousPacket> packets( | |
| 761 packet_lengths.size()); | |
| 762 for (size_t i = 0; i < packet_lengths.size(); ++i) { | |
| 763 packets[i].length = packet_lengths[i]; | |
| 764 packets[i].transferred_length = 0; | |
| 765 packets[i].status = status; | |
| 766 } | |
| 767 task_runner_->PostTask(FROM_HERE, base::Bind(callback, nullptr, packets)); | |
| 768 } | |
| 769 | |
| 770 void UsbDeviceHandleUsbfs::SetUpTimeoutCallback(Transfer* transfer, | |
| 771 unsigned int timeout) { | |
| 772 if (timeout > 0) { | |
| 773 transfer->timeout_closure.Reset( | |
| 774 base::Bind(&UsbDeviceHandleUsbfs::TransferTimedOut, transfer)); | |
| 775 task_runner_->PostDelayedTask(FROM_HERE, | |
| 776 transfer->timeout_closure.callback(), | |
| 777 base::TimeDelta::FromMilliseconds(timeout)); | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 // static | |
| 782 void UsbDeviceHandleUsbfs::TransferTimedOut(Transfer* transfer) { | |
| 783 // |transfer| must stay in |transfers_| as it is still being processed by the | |
| 784 // kernel and will be reaped later. Just tell the caller that the timeout | |
| 785 // elapsed. | |
| 786 transfer->timed_out = true; | |
| 787 if (transfer->urb.type == USBDEVFS_URB_TYPE_ISO) { | |
| 788 std::vector<IsochronousPacket> packets(transfer->urb.number_of_packets); | |
| 789 for (size_t i = 0; i < packets.size(); ++i) { | |
| 790 packets[i].length = transfer->urb.iso_frame_desc[i].length; | |
| 791 packets[i].transferred_length = 0; | |
| 792 packets[i].status = USB_TRANSFER_TIMEOUT; | |
| 793 } | |
| 794 transfer->isoc_callback.Run(transfer->buffer, packets); | |
| 795 } else { | |
| 796 transfer->callback.Run(USB_TRANSFER_TIMEOUT, transfer->buffer, 0); | |
| 797 } | |
| 798 } | |
| 799 | |
| 800 } // namespace device | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1897483003:
Revert of Replace libusb in the Linux/Chrome OS USB I/O path. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master