def __init__(self, crc_class, layout):
self.sink = sink = Sink(layout)
self.source = source = Source(layout)
self.busy = Signal()
# # #
dw = flen(sink.data)
crc = crc_class(dw)
fsm = FSM(reset_state="IDLE")
self.submodules += crc, fsm
fsm.act("IDLE",
crc.reset.eq(1),
sink.ack.eq(1),
If(sink.stb & sink.sop,
sink.ack.eq(0),
NextState("COPY"),
)
)
fsm.act("COPY",
crc.ce.eq(sink.stb & source.ack),
crc.data.eq(sink.data),
Record.connect(sink, source),
source.eop.eq(0),
If(sink.stb & sink.eop & source.ack,
NextState("INSERT"),
)
)
ratio = crc.width//dw
if ratio > 1:
cnt = Signal(max=ratio, reset=ratio-1)
cnt_done = Signal()
fsm.act("INSERT",
source.stb.eq(1),
chooser(crc.value, cnt, source.data, reverse=True),
If(cnt_done,
source.eop.eq(1),
If(source.ack, NextState("IDLE"))
)
)
self.comb += cnt_done.eq(cnt == 0)
self.sync += \
If(fsm.ongoing("IDLE"),
cnt.eq(cnt.reset)
).Elif(fsm.ongoing("INSERT") & ~cnt_done,
cnt.eq(cnt - source.ack)
)
else:
fsm.act("INSERT",
source.stb.eq(1),
source.eop.eq(1),
source.data.eq(crc.value),
If(source.ack, NextState("IDLE"))
)
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def __init__(self, crc_class, layout):
self.sink = sink = Sink(layout)
self.source = source = Source(layout)
self.busy = Signal()
# # #
dw = flen(sink.data)
crc = crc_class(dw)
fsm = FSM(reset_state="IDLE")
self.submodules += crc, fsm
fsm.act("IDLE", crc.reset.eq(1), sink.ack.eq(1),
If(
sink.stb & sink.sop,
sink.ack.eq(0),
NextState("COPY"),
))
fsm.act("COPY", crc.ce.eq(sink.stb & source.ack),
crc.data.eq(sink.data), Record.connect(sink, source),
source.eop.eq(0),
If(
sink.stb & sink.eop & source.ack,
NextState("INSERT"),
))
ratio = crc.width // dw
if ratio > 1:
cnt = Signal(max=ratio, reset=ratio - 1)
cnt_done = Signal()
fsm.act(
"INSERT", source.stb.eq(1),
chooser(crc.value, cnt, source.data, reverse=True),
If(cnt_done, source.eop.eq(1), If(source.ack,
NextState("IDLE"))))
self.comb += cnt_done.eq(cnt == 0)
self.sync += \
If(fsm.ongoing("IDLE"),
cnt.eq(cnt.reset)
).Elif(fsm.ongoing("INSERT") & ~cnt_done,
cnt.eq(cnt - source.ack)
)
else:
fsm.act("INSERT", source.stb.eq(1), source.eop.eq(1),
source.data.eq(crc.value), If(source.ack,
NextState("IDLE")))
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def __init__(self, crc_class, layout):
self.sink = sink = Sink(layout)
self.source = source = Source(layout)
self.busy = Signal()
# # #
dw = flen(sink.data)
crc = crc_class(dw)
self.submodules += crc
ratio = crc.width // dw
error = Signal()
fifo = InsertReset(SyncFIFO(layout, ratio + 1))
self.submodules += fifo
fsm = FSM(reset_state="RESET")
self.submodules += fsm
fifo_in = Signal()
fifo_out = Signal()
fifo_full = Signal()
self.comb += [
fifo_full.eq(fifo.fifo.level == ratio),
fifo_in.eq(sink.stb & (~fifo_full | fifo_out)),
fifo_out.eq(source.stb & source.ack),
Record.connect(sink, fifo.sink),
fifo.sink.stb.eq(fifo_in),
self.sink.ack.eq(fifo_in),
source.stb.eq(sink.stb & fifo_full),
source.sop.eq(fifo.source.sop),
source.eop.eq(sink.eop),
fifo.source.ack.eq(fifo_out),
source.payload.eq(fifo.source.payload),
source.error.eq(sink.error | crc.error),
]
fsm.act(
"RESET",
crc.reset.eq(1),
fifo.reset.eq(1),
NextState("IDLE"),
)
fsm.act(
"IDLE", crc.data.eq(sink.data),
If(sink.stb & sink.sop & sink.ack, crc.ce.eq(1),
NextState("COPY")))
fsm.act(
"COPY", crc.data.eq(sink.data),
If(sink.stb & sink.ack, crc.ce.eq(1),
If(sink.eop, NextState("RESET"))))
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def __init__(self, crc_class, layout):
self.sink = sink = Sink(layout, True)
self.source = source = Source(layout, True)
self.busy = Signal()
###
dw = flen(sink.d)
self.submodules.crc = crc_class(dw)
fsm = FSM(reset_state="RESET_CRC")
self.submodules += fsm
fsm.act("RESET_CRC",
sink.ack.eq(0),
self.crc.reset.eq(1),
NextState("IDLE")
)
fsm.act("IDLE",
sink.ack.eq(sink.stb),
If(sink.stb & sink.sop,
Record.connect(sink, source),
self.crc.ce.eq(sink.ack),
self.crc.d.eq(sink.d),
NextState("COPY")
)
)
fsm.act("COPY",
Record.connect(sink, source),
self.crc.ce.eq(sink.stb & sink.ack),
self.crc.d.eq(sink.d),
source.error.eq(sink.eop & self.crc.error),
If(sink.stb & sink.ack & sink.eop,
NextState("RESET_CRC")
)
)
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def __init__(self, crc_class, layout):
self.sink = sink = Sink(layout)
self.source = source = Source(layout)
self.busy = Signal()
# # #
dw = flen(sink.data)
crc = crc_class(dw)
self.submodules += crc
ratio = crc.width//dw
error = Signal()
fifo = InsertReset(SyncFIFO(layout, ratio + 1))
self.submodules += fifo
fsm = FSM(reset_state="RESET")
self.submodules += fsm
fifo_in = Signal()
fifo_out = Signal()
fifo_full = Signal()
self.comb += [
fifo_full.eq(fifo.fifo.level == ratio),
fifo_in.eq(sink.stb & (~fifo_full | fifo_out)),
fifo_out.eq(source.stb & source.ack),
Record.connect(sink, fifo.sink),
fifo.sink.stb.eq(fifo_in),
self.sink.ack.eq(fifo_in),
source.stb.eq(sink.stb & fifo_full),
source.sop.eq(fifo.source.sop),
source.eop.eq(sink.eop),
fifo.source.ack.eq(fifo_out),
source.payload.eq(fifo.source.payload),
source.error.eq(sink.error | crc.error),
]
fsm.act("RESET",
crc.reset.eq(1),
fifo.reset.eq(1),
NextState("IDLE"),
)
fsm.act("IDLE",
crc.data.eq(sink.data),
If(sink.stb & sink.sop & sink.ack,
crc.ce.eq(1),
NextState("COPY")
)
)
fsm.act("COPY",
crc.data.eq(sink.data),
If(sink.stb & sink.ack,
crc.ce.eq(1),
If(sink.eop,
NextState("RESET")
)
)
)
self.comb += self.busy.eq(~fsm.ongoing("IDLE"))
def __init__(self, depth, nslots=2):
self.source = source = Source(eth_description(32))
slotbits = max(log2_int(nslots), 1)
lengthbits = log2_int(depth*4) # length in bytes
self.lengthbits = lengthbits
self._start = CSR()
self._ready = CSRStatus()
self._slot = CSRStorage(slotbits)
self._length = CSRStorage(lengthbits)
self.submodules.ev = EventManager()
self.ev.done = EventSourcePulse()
self.ev.finalize()
###
# command fifo
fifo = SyncFIFO([("slot", slotbits), ("length", lengthbits)], nslots)
self.submodules += fifo
self.comb += [
fifo.we.eq(self._start.re),
fifo.din.slot.eq(self._slot.storage),
fifo.din.length.eq(self._length.storage),
self._ready.status.eq(fifo.writable)
]
# length computation
cnt = Signal(lengthbits)
clr_cnt = Signal()
inc_cnt = Signal()
self.sync += \
If(clr_cnt,
cnt.eq(0)
).Elif(inc_cnt,
cnt.eq(cnt+4)
)
# fsm
first = Signal()
last = Signal()
last_d = Signal()
fsm = FSM(reset_state="IDLE")
self.submodules += fsm
fsm.act("IDLE",
clr_cnt.eq(1),
If(fifo.readable,
NextState("CHECK")
)
)
fsm.act("CHECK",
If(~last_d,
NextState("SEND"),
).Else(
NextState("END"),
)
)
length_lsb = fifo.dout.length[0:2]
fsm.act("SEND",
source.stb.eq(1),
source.sop.eq(first),
source.eop.eq(last),
If(last,
If(length_lsb == 3,
source.last_be.eq(0b0010)
).Elif(length_lsb == 2,
source.last_be.eq(0b0100)
).Elif(length_lsb == 1,
source.last_be.eq(0b1000)
).Else(
source.last_be.eq(0b0001)
)
),
If(source.ack,
inc_cnt.eq(~last),
NextState("CHECK")
)
)
fsm.act("END",
fifo.re.eq(1),
self.ev.done.trigger.eq(1),
NextState("IDLE")
)
# first/last computation
self.sync += [
If(fsm.ongoing("IDLE"),
first.eq(1)
).Elif(source.stb & source.ack,
first.eq(0)
)
]
self.comb += last.eq(cnt + 4 >= fifo.dout.length)
self.sync += last_d.eq(last)
# memory
rd_slot = fifo.dout.slot
mems = [None]*nslots
ports = [None]*nslots
for n in range(nslots):
mems[n] = Memory(32, depth)
ports[n] = mems[n].get_port()
self.specials += ports[n]
self.mems = mems
cases = {}
for n, port in enumerate(ports):
self.comb += ports[n].adr.eq(cnt[2:])
cases[n] = [source.d.eq(port.dat_r)]
self.comb += Case(rd_slot, cases)
