artiq/artiq/gateware/drtio/rt_errors_satellite.py

87 lines
3.4 KiB
Python

"""Protocol error reporting for satellites."""
from migen import *
from migen.genlib.cdc import BlindTransfer
from misoc.interconnect.csr import *
class RTErrorsSatellite(Module, AutoCSR):
def __init__(self, rt_packet, tsc, async_errors):
self.protocol_error = CSR(5)
self.underflow_channel = CSRStatus(16)
self.underflow_timestamp_event = CSRStatus(64)
self.underflow_timestamp_counter = CSRStatus(64)
self.buffer_space_timeout_dest = CSRStatus(8)
self.rtio_error = CSR(3)
self.sequence_error_channel = CSRStatus(16)
self.collision_channel = CSRStatus(16)
self.busy_channel = CSRStatus(16)
def error_csr(csr, *sources):
for n, (source, detect_edges, din, dout) in enumerate(sources):
assert isinstance(source, Signal)
if din is not None:
data_width = len(din)
else:
data_width = 0
xfer = BlindTransfer("rio", "sys", data_width=data_width)
self.submodules += xfer
if detect_edges:
source_r = Signal()
self.sync.rio += source_r.eq(source)
self.comb += xfer.i.eq(source & ~source_r)
else:
self.comb += xfer.i.eq(source)
pending = Signal(related=source)
self.sync += [
If(csr.re & csr.r[n], pending.eq(0)),
If(xfer.o, pending.eq(1))
]
self.comb += csr.w[n].eq(pending)
if din is not None:
self.comb += xfer.data_i.eq(din)
self.sync += If(xfer.o & ~pending, dout.eq(xfer.data_o))
cri = rt_packet.cri
# The master is normally responsible for avoiding output overflows
# and output underflows. The error reports here are only for diagnosing
# internal ARTIQ bugs.
underflow = Signal()
overflow = Signal()
underflow_error_cri = Signal(16+64+64)
underflow_error_csr = Signal(16+64+64)
self.comb += [
underflow.eq(cri.o_status[1]),
overflow.eq(cri.o_status[0]),
underflow_error_cri.eq(Cat(cri.chan_sel[:16],
cri.o_timestamp,
tsc.full_ts_cri)),
Cat(self.underflow_channel.status,
self.underflow_timestamp_event.status,
self.underflow_timestamp_counter.status).eq(underflow_error_csr)
]
error_csr(self.protocol_error,
(rt_packet.unknown_packet_type, False, None, None),
(rt_packet.packet_truncated, False, None, None),
(rt_packet.buffer_space_timeout, False,
cri.chan_sel[16:], self.buffer_space_timeout_dest.status),
(underflow, True, underflow_error_cri, underflow_error_csr),
(overflow, True, None, None)
)
error_csr(self.rtio_error,
(async_errors.sequence_error, False,
async_errors.sequence_error_channel, self.sequence_error_channel.status),
(async_errors.collision, False,
async_errors.collision_channel, self.collision_channel.status),
(async_errors.busy, False,
async_errors.busy_channel, self.busy_channel.status)
)