def unpack_us_cc(cls, pkt, check_parity=False):
tlp = cls()
tlp.fmt_type = TlpType.CPL
tlp.lower_address = pkt.data[0] & 0x7f
tlp.at = TlpAt((pkt.data[0] >> 8) & 3)
tlp.byte_count = (pkt.data[0] >> 16) & 0x1fff
if pkt.data[0] & (1 << 29):
tlp.fmt_type = TlpType.CPL_LOCKED
tlp.length = pkt.data[1] & 0x7ff
if tlp.length > 0:
tlp.fmt = TlpFmt.THREE_DW_DATA
tlp.status = CplStatus((pkt.data[1] >> 11) & 7)
tlp.ep = bool(pkt.data[1] & 1 << 14)
tlp.requester_id = PcieId.from_int(pkt.data[1] >> 16)
tlp.completer_id = PcieId.from_int(pkt.data[2] >> 8)
tlp.tag = pkt.data[2] & 0xff
tlp.completer_id_enable = bool(pkt.data[2] & (1 << 24))
tlp.tc = TlpTc((pkt.data[2] >> 25) & 0x7)
tlp.attr = TlpAttr((pkt.data[2] >> 28) & 0x7)
tlp.discontinue = pkt.discontinue
if tlp.length > 0:
for dw in pkt.data[3:3+tlp.length]:
tlp.data.extend(struct.pack('<L', dw))
# check parity
if check_parity:
assert pkt.check_parity()
return tlp
def unpack_us_rc(cls, pkt, check_parity=False):
tlp = cls()
tlp.fmt_type = TlpType.CPL
tlp.lower_address = pkt.data[0] & 0xfff
tlp.error_code = (pkt.data[0] >> 12) & 0xf
tlp.byte_count = (pkt.data[0] >> 16) & 0x1fff
if pkt.data[0] & (1 << 29):
tlp.fmt_type = TlpType.CPL_LOCKED
tlp.request_completed = pkt.data[0] & (1 << 30)
tlp.length = pkt.data[1] & 0x7ff
if tlp.length > 0:
tlp.fmt = TlpFmt.THREE_DW_DATA
tlp.status = CplStatus((pkt.data[1] >> 11) & 7)
tlp.ep = bool(pkt.data[1] & 1 << 14)
tlp.requester_id = PcieId.from_int(pkt.data[1] >> 16)
tlp.completer_id = PcieId.from_int(pkt.data[2] >> 8)
tlp.tag = pkt.data[2] & 0xff
tlp.tc = TlpTc((pkt.data[2] >> 25) & 0x7)
tlp.attr = TlpAttr((pkt.data[2] >> 28) & 0x7)
tlp.discontinue = pkt.discontinue
if tlp.length > 0:
for dw in pkt.data[3:3+tlp.length]:
tlp.data.extend(struct.pack('<L', dw))
# compute byte enables
byte_en = [0]*3
first_be = (0xf << (tlp.lower_address & 3)) & 0xf
if tlp.byte_count+(tlp.lower_address & 3) > tlp.length*4:
last_be = 0xf
else:
last_be = 0xf >> ((4-tlp.byte_count-tlp.lower_address) & 3)
if tlp.get_payload_size_dw() == 1:
first_be = first_be & last_be
last_be = 0
if tlp.get_payload_size_dw() >= 1:
byte_en += [first_be]
if tlp.get_payload_size_dw() > 2:
byte_en += [0xf] * (tlp.get_payload_size_dw()-2)
if tlp.get_payload_size_dw() > 1:
byte_en += [last_be]
# check byte enables
assert byte_en == pkt.byte_en
# check parity
if check_parity:
assert pkt.check_parity()
return tlp
def unpack_us_cq(cls, pkt, check_parity=False):
tlp = cls()
req_type = (pkt.data[2] >> 11) & 0xf
tlp.fmt_type = req_type_to_tlp_type[req_type]
tlp.length = pkt.data[2] & 0x7ff
tlp.requester_id = PcieId.from_int(pkt.data[2] >> 16)
tlp.tag = pkt.data[3] & 0xff
tlp.tc = TlpTc((pkt.data[3] >> 25) & 0x7)
tlp.attr = TlpAttr((pkt.data[3] >> 28) & 0x7)
if req_type & 8 == 0:
# memory, IO, or atomic operation
tlp.at = TlpAt(pkt.data[0] & 3)
tlp.address = (pkt.data[1] << 32) | (pkt.data[0] & 0xfffffffc)
if tlp.address > 0xffffffff:
if tlp.fmt == TlpFmt.THREE_DW:
tlp.fmt = TlpFmt.FOUR_DW
elif tlp.fmt == TlpFmt.THREE_DW_DATA:
tlp.fmt = TlpFmt.FOUR_DW_DATA
tlp.completer_id = PcieId(0, 0, (pkt.data[3] >> 8) & 0xff)
tlp.bar_id = (pkt.data[3] >> 16) & 7
tlp.bar_aperture = (pkt.data[3] >> 19) & 0x3f
tlp.first_be = pkt.first_be
tlp.last_be = pkt.last_be
tlp.discontinue = pkt.discontinue
for dw in pkt.data[4:]:
tlp.data.extend(struct.pack('<L', dw))
# compute byte enables
byte_en = [0]*4
if tlp.get_payload_size_dw() >= 1:
byte_en += [tlp.first_be]
if tlp.get_payload_size_dw() > 2:
byte_en += [0xf] * (tlp.get_payload_size_dw()-2)
if tlp.get_payload_size_dw() > 1:
byte_en += [tlp.last_be]
# check byte enables
assert byte_en == pkt.byte_en
# check parity
if check_parity:
assert pkt.check_parity()
return tlp
def unpack_us_rq(cls, pkt, check_parity=False):
tlp = cls()
req_type = (pkt.data[2] >> 11) & 0xf
tlp.fmt_type = req_type_to_tlp_type[req_type]
tlp.length = pkt.data[2] & 0x7ff
tlp.ep = bool(pkt.data[2] & 1 << 15)
tlp.requester_id = PcieId.from_int(pkt.data[2] >> 16)
tlp.tag = pkt.data[3] & 0xff
tlp.tc = TlpTc((pkt.data[3] >> 25) & 0x7)
tlp.attr = TlpAttr((pkt.data[3] >> 28) & 0x7)
if req_type < 12:
if req_type < 8:
# memory, IO, or atomic operation
tlp.at = TlpAt(pkt.data[0] & 3)
tlp.address = (pkt.data[1] << 32) | (pkt.data[0] & 0xfffffffc)
if tlp.address > 0xffffffff:
if tlp.fmt == TlpFmt.THREE_DW:
tlp.fmt = TlpFmt.FOUR_DW
elif tlp.fmt == TlpFmt.THREE_DW_DATA:
tlp.fmt = TlpFmt.FOUR_DW_DATA
else:
# configuration
tlp.register_number = (pkt.data[0] >> 2) & 0x3ff
tlp.completer_id = PcieId.from_int(pkt.data[3] >> 8)
tlp.requester_id_enable = bool(pkt.data[3] & (1 << 24))
tlp.first_be = pkt.first_be
tlp.last_be = pkt.last_be
tlp.discontinue = pkt.discontinue
tlp.seq_num = pkt.seq_num
for dw in pkt.data[4:]:
tlp.data.extend(struct.pack('<L', dw))
# check parity
if check_parity:
assert pkt.check_parity()
else:
raise Exception("TODO")
return tlp