forked from M-Labs/artiq
coredevice.comm_*: refactor.
This commit is contained in:
whitequark
parent
acc97a74f0
commit
d6ab567242
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@ -3,7 +3,7 @@ from operator import itemgetter
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class Comm:
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def __init__(self, dmgr):
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pass
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super().__init__()
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def switch_clock(self, external):
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pass
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@ -50,7 +50,11 @@ class UnsupportedDevice(Exception):
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class CommGeneric:
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# methods for derived classes to implement
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def __init__(self):
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self._read_type = self._write_type = None
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self._read_length = 0
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self._write_buffer = []
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def open(self):
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"""Opens the communication channel.
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Must do nothing if already opened."""
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@ -70,167 +74,251 @@ class CommGeneric:
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"""Writes exactly length bytes to the communication channel.
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The channel is assumed to be opened."""
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raise NotImplementedError
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#
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# Reader interface
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#
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def _read_header(self):
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self.open()
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if self._read_length > 0:
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raise IOError("Read underrun ({} bytes remaining)".
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format(self._read_length))
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# Wait for a synchronization sequence, 5a 5a 5a 5a.
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sync_count = 0
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while sync_count < 4:
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(c, ) = struct.unpack("B", self.read(1))
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if c == 0x5a:
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(sync_byte, ) = struct.unpack("B", self.read(1))
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if sync_byte == 0x5a:
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sync_count += 1
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else:
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sync_count = 0
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length = struct.unpack(">l", self.read(4))[0]
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if not length: # inband connection close
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raise OSError("Connection closed")
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tyv = struct.unpack("B", self.read(1))[0]
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ty = _D2HMsgType(tyv)
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logger.debug("receiving message: type=%r length=%d", ty, length)
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return length, ty
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def _write_header(self, length, ty):
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# Read message header.
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(self._read_length, ) = struct.unpack(">l", self.read(4))
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if not self._read_length: # inband connection close
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raise OSError("Connection closed")
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(raw_type, ) = struct.unpack("B", self.read(1))
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self._read_type = _D2HMsgType(raw_type)
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if self._read_length < 9:
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raise IOError("Read overrun in message header ({} remaining)".
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format(self._read_length))
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self._read_length -= 9
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logger.debug("receiving message: type=%r length=%d",
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self._read_type, self._read_length)
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def _read_expect(self, ty):
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if self._read_type != ty:
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raise IOError("Incorrect reply from device: {} (expected {})".
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format(self._read_type, ty))
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def _read_empty(self, ty):
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self._read_header()
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self._read_expect(ty)
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def _read_chunk(self, length):
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if self._read_length < length:
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raise IOError("Read overrun while trying to read {} bytes ({} remaining)".
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format(length, self._read_length))
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self._read_length -= length
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return self.read(length)
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def _read_int8(self):
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(value, ) = struct.unpack("B", self._read_chunk(1))
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return value
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def _read_int32(self):
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(value, ) = struct.unpack(">l", self._read_chunk(4))
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return value
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def _read_int64(self):
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(value, ) = struct.unpack(">q", self._read_chunk(8))
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return value
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def _read_float64(self):
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(value, ) = struct.unpack(">d", self._read_chunk(8))
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return value
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#
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# Writer interface
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#
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def _write_header(self, ty):
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self.open()
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logger.debug("sending message: type=%r length=%d", ty, length)
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self.write(struct.pack(">ll", 0x5a5a5a5a, length))
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if ty is not None:
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self.write(struct.pack("B", ty.value))
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logger.debug("preparing to send message: type=%r", ty)
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self._write_type = ty
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self._write_buffer = []
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def _write_flush(self):
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# Calculate message size.
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length = sum([len(chunk) for chunk in self._write_buffer])
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logger.debug("sending message: type=%r length=%d", self._write_type, length)
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# Write synchronization sequence, header and body.
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self.write(struct.pack(">llB", 0x5a5a5a5a,
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9 + length, self._write_type.value))
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for chunk in self._write_buffer:
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self.write(chunk)
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def _write_empty(self, ty):
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self._write_header(ty)
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self._write_flush()
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def _write_int8(self, value):
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self._write_buffer.append(struct.pack("B", value))
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def _write_int32(self, value):
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self._write_buffer.append(struct.pack(">l", value))
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def _write_int64(self, value):
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self._write_buffer.append(struct.pack(">q", value))
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def _write_float64(self, value):
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self._write_buffer.append(struct.pack(">d", value))
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def _write_string(self, value):
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self._write_buffer.append(value)
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#
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# Exported APIs
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#
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def reset_session(self):
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self._write_header(0, None)
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self.write(struct.pack(">ll", 0x5a5a5a5a, 0))
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def check_ident(self):
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self._write_header(9, _H2DMsgType.IDENT_REQUEST)
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_, ty = self._read_header()
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if ty != _D2HMsgType.IDENT_REPLY:
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raise IOError("Incorrect reply from device: {}".format(ty))
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(reply, ) = struct.unpack("B", self.read(1))
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runtime_id = chr(reply)
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for i in range(3):
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(reply, ) = struct.unpack("B", self.read(1))
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runtime_id += chr(reply)
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if runtime_id != "AROR":
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self._write_empty(_H2DMsgType.IDENT_REQUEST)
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self._read_header()
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self._read_expect(_D2HMsgType.IDENT_REPLY)
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runtime_id = self._read_chunk(4)
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if runtime_id != b"AROR":
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raise UnsupportedDevice("Unsupported runtime ID: {}"
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.format(runtime_id))
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def switch_clock(self, external):
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self._write_header(10, _H2DMsgType.SWITCH_CLOCK)
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self.write(struct.pack("B", int(external)))
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_, ty = self._read_header()
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if ty != _D2HMsgType.CLOCK_SWITCH_COMPLETED:
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raise IOError("Incorrect reply from device: {}".format(ty))
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self._write_header(_H2DMsgType.SWITCH_CLOCK)
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self._write_int8(external)
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self._write_flush()
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def load(self, kcode):
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self._write_header(len(kcode) + 9, _H2DMsgType.LOAD_LIBRARY)
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self.write(kcode)
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_, ty = self._read_header()
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if ty != _D2HMsgType.LOAD_COMPLETED:
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raise IOError("Incorrect reply from device: "+str(ty))
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self._read_empty(_D2HMsgType.CLOCK_SWITCH_COMPLETED)
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def load(self, kernel_library):
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self._write_header(_H2DMsgType.LOAD_LIBRARY)
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self._write_string(kernel_library)
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self._write_flush()
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self._read_empty(_D2HMsgType.LOAD_COMPLETED)
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def run(self):
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self._write_header(9, _H2DMsgType.RUN_KERNEL)
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self._write_empty(_H2DMsgType.RUN_KERNEL)
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logger.debug("running kernel")
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def flash_storage_read(self, key):
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self._write_header(9+len(key), _H2DMsgType.FLASH_READ_REQUEST)
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self.write(key)
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length, ty = self._read_header()
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if ty != _D2HMsgType.FLASH_READ_REPLY:
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raise IOError("Incorrect reply from device: {}".format(ty))
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value = self.read(length - 9)
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return value
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self._write_header(_H2DMsgType.FLASH_READ_REQUEST)
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self._write_string(key)
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self._write_flush()
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self._read_header()
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self._read_expect(_D2HMsgType.FLASH_READ_REPLY)
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return self._read_chunk(self._read_length)
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def flash_storage_write(self, key, value):
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self._write_header(9+len(key)+1+len(value),
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_H2DMsgType.FLASH_WRITE_REQUEST)
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self.write(key)
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self.write(b"\x00")
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self.write(value)
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_, ty = self._read_header()
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if ty != _D2HMsgType.FLASH_OK_REPLY:
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if ty == _D2HMsgType.FLASH_ERROR_REPLY:
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raise IOError("Flash storage is full")
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else:
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raise IOError("Incorrect reply from device: {}".format(ty))
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self._write_header(_H2DMsgType.FLASH_WRITE_REQUEST)
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self._write_string(key)
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self._write_string(b"\x00")
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self._write_string(value)
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self._write_flush()
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self._read_header()
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if self._read_type == _D2HMsgType.FLASH_ERROR_REPLY:
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raise IOError("Flash storage is full")
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else:
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self._read_expect(_D2HMsgType.FLASH_OK_REPLY)
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def flash_storage_erase(self):
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self._write_header(9, _H2DMsgType.FLASH_ERASE_REQUEST)
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_, ty = self._read_header()
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if ty != _D2HMsgType.FLASH_OK_REPLY:
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raise IOError("Incorrect reply from device: {}".format(ty))
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self._write_empty(_H2DMsgType.FLASH_ERASE_REQUEST)
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self._read_empty(_D2HMsgType.FLASH_OK_REPLY)
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def flash_storage_remove(self, key):
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self._write_header(9+len(key), _H2DMsgType.FLASH_REMOVE_REQUEST)
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self.write(key)
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_, ty = self._read_header()
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if ty != _D2HMsgType.FLASH_OK_REPLY:
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raise IOError("Incorrect reply from device: {}".format(ty))
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self._write_header(_H2DMsgType.FLASH_REMOVE_REQUEST)
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self._write_string(key)
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self._write_flush()
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def _receive_rpc_value(self, type_tag):
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if type_tag == "n":
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self._read_empty(_D2HMsgType.FLASH_OK_REPLY)
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def _receive_rpc_value(self, tag):
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if tag == "n":
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return None
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if type_tag == "b":
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return bool(struct.unpack("B", self.read(1))[0])
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if type_tag == "i":
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return struct.unpack(">l", self.read(4))[0]
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if type_tag == "I":
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return struct.unpack(">q", self.read(8))[0]
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if type_tag == "f":
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return struct.unpack(">d", self.read(8))[0]
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if type_tag == "F":
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n, d = struct.unpack(">qq", self.read(16))
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return Fraction(n, d)
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elif tag == "b":
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return bool(self._read_int8())
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elif tag == "i":
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return self._read_int32()
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elif tag == "I":
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return self._read_int64()
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elif tag == "f":
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return self._read_float64()
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elif tag == "F":
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numerator = self._read_int64()
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denominator = self._read_int64()
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return Fraction(numerator, denominator)
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elif tag == "l":
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elt_tag = chr(self._read_int8())
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length = self._read_int32()
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return [self._receive_rpc_value(elt_tag) for _ in range(length)]
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else:
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raise IOError("Unknown RPC value tag: {}", tag)
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def _receive_rpc_values(self):
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r = []
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result = []
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while True:
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type_tag = chr(struct.unpack("B", self.read(1))[0])
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if type_tag == "\x00":
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return r
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elif type_tag == "l":
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elt_type_tag = chr(struct.unpack("B", self.read(1))[0])
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length = struct.unpack(">l", self.read(4))[0]
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r.append([self._receive_rpc_value(elt_type_tag)
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for i in range(length)])
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tag = chr(self._read_int8())
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if tag == "\x00":
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return result
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else:
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r.append(self._receive_rpc_value(type_tag))
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result.append(self._receive_rpc_value(tag))
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def _serve_rpc(self, rpc_map):
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rpc_num = struct.unpack(">l", self.read(4))[0]
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service = self._read_int32()
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args = self._receive_rpc_values()
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logger.debug("rpc service: %d %r", rpc_num, args)
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eid, r = rpc_wrapper.run_rpc(rpc_map[rpc_num], args)
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self._write_header(9+2*4, _H2DMsgType.RPC_REPLY)
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self.write(struct.pack(">ll", eid, r))
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logger.debug("rpc service: %d %r == %r (eid %d)", rpc_num, args,
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r, eid)
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logger.debug("rpc service: %d %r", service, args)
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eid, result = rpc_wrapper.run_rpc(rpc_map[rpc_num], args)
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logger.debug("rpc service: %d %r == %r (eid %d)", service, args,
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result, eid)
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self._write_header(_H2DMsgType.RPC_REPLY)
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self._write_int32(eid)
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self._write_int32(result)
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self._write_flush()
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def _serve_exception(self):
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eid, p0, p1, p2 = struct.unpack(">lqqq", self.read(4+3*8))
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eid = self._read_int32()
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params = [self._read_int64() for _ in range(3)]
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rpc_wrapper.filter_rpc_exception(eid)
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raise exception(self.core, p0, p1, p2)
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raise exception(self.core, *params)
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def serve(self, rpc_map):
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while True:
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_, ty = self._read_header()
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if ty == _D2HMsgType.RPC_REQUEST:
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self._read_header()
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if self._read_type == _D2HMsgType.RPC_REQUEST:
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self._serve_rpc(rpc_map)
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elif ty == _D2HMsgType.KERNEL_EXCEPTION:
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elif self._read_type == _D2HMsgType.KERNEL_EXCEPTION:
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self._serve_exception()
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elif ty == _D2HMsgType.KERNEL_FINISHED:
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return
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else:
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raise IOError("Incorrect request from device: "+str(ty))
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self._read_expect(_D2HMsgType.KERNEL_FINISHED)
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return
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def get_log(self):
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self._write_header(9, _H2DMsgType.LOG_REQUEST)
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length, ty = self._read_header()
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if ty != _D2HMsgType.LOG_REPLY:
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raise IOError("Incorrect request from device: "+str(ty))
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r = ""
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for i in range(length - 9):
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c = struct.unpack("B", self.read(1))[0]
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if c:
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r += chr(c)
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return r
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self._write_empty(_H2DMsgType.LOG_REQUEST)
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self._read_header()
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self._read_expect(_D2HMsgType.LOG_REPLY)
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return self._read_chunk(self._read_length).decode('utf-8')
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@ -10,6 +10,7 @@ logger = logging.getLogger(__name__)
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class Comm(CommGeneric):
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def __init__(self, dmgr, serial_dev, baud_rate=115200):
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super().__init__()
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self.serial_dev = serial_dev
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self.baud_rate = baud_rate
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@ -9,6 +9,7 @@ logger = logging.getLogger(__name__)
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class Comm(CommGeneric):
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def __init__(self, dmgr, host, port=1381):
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super().__init__()
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self.host = host
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self.port = port
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