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drtio: large data support

This commit is contained in:
Sebastien Bourdeauducq 2016-11-25 17:04:09 +08:00
parent 8b736ddbc9
commit 8090abef5d
1 changed files with 165 additions and 80 deletions
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245
artiq/gateware/drtio/rt_packets.py
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@ -29,8 +29,20 @@ class PacketLayoutManager:
layout.append(("packet_pad", self.alignment - misalignment))
self.layouts[name] = layout
def field_length(self, type_name, field_name):
layout = self.layouts[type_name]
for name, length in layout:
if name == field_name:
return length
raise KeyError
def get_m2s_layouts(alignment):
if alignment > 128:
short_data_len = alignment - 128 + 16
else:
short_data_len = 16
plm = PacketLayoutManager(alignment)
plm.add_type("echo_request")
plm.add_type("set_time", ("timestamp", 64))
@ -38,8 +50,8 @@ def get_m2s_layouts(alignment):
plm.add_type("write", ("timestamp", 64),
("channel", 16),
("address", 16),
("data_len", 8),
("short_data", 8))
("extra_data_cnt", 8),
("short_data", short_data_len))
plm.add_type("fifo_space_request", ("channel", 16))
return plm
@ -125,34 +137,33 @@ class TransmitDatapath(Module):
self.ws = ws
self.plm = plm
# inputs
self.packet_buffer = Signal(max(layout_len(l)
for l in plm.layouts.values()))
w_in_packet = len(self.packet_buffer)//ws
self.packet_len = Signal(max=w_in_packet+1)
self.packet_last_n = Signal(max=w_in_packet)
self.packet_stb = Signal()
self.packet_last = Signal()
# control
self.stb = Signal()
self.done = Signal()
self.raw_stb = Signal()
self.raw_data = Signal(ws)
# # #
packet_buffer_count = Signal(max=w_in_packet+1)
packet_buffer_count = Signal(max=w_in_packet)
self.comb += self.packet_last.eq(packet_buffer_count == self.packet_last_n)
self.sync += [
self.done.eq(0),
frame.eq(0),
packet_buffer_count.eq(0),
If(self.stb & ~self.done,
If(packet_buffer_count == self.packet_len,
self.done.eq(1)
).Else(
frame.eq(1),
Case(packet_buffer_count,
{i: data.eq(self.packet_buffer[i*ws:(i+1)*ws])
for i in range(w_in_packet)}),
packet_buffer_count.eq(packet_buffer_count + 1)
)
If(self.packet_stb,
frame.eq(1),
Case(packet_buffer_count,
{i: data.eq(self.packet_buffer[i*ws:(i+1)*ws])
for i in range(w_in_packet)}),
packet_buffer_count.eq(packet_buffer_count + 1)
),
If(self.raw_stb,
frame.eq(1),
data.eq(self.raw_data)
)
]
@ -170,8 +181,9 @@ class TransmitDatapath(Module):
if kwargs:
raise ValueError
return [
self.packet_stb.eq(1),
self.packet_buffer.eq(value),
self.packet_len.eq(idx//self.ws)
self.packet_last_n.eq(idx//self.ws-1)
]
@ -191,7 +203,7 @@ class RTPacketSatellite(Module):
self.write_timestamp = Signal(64)
self.write_channel = Signal(16)
self.write_address = Signal(16)
self.write_data = Signal(256)
self.write_data = Signal(512)
self.write_overflow = Signal()
self.write_overflow_ack = Signal()
self.write_underflow = Signal()
@ -212,6 +224,20 @@ class RTPacketSatellite(Module):
link_layer.tx_rt_frame, link_layer.tx_rt_data, tx_plm)
self.submodules += tx_dp
# RX write data buffer
write_data_buffer_load = Signal()
write_data_buffer_cnt = Signal(max=512//ws+1)
write_data_buffer = Signal(512)
self.sync += \
If(write_data_buffer_load,
Case(write_data_buffer_cnt,
{i: write_data_buffer[i*ws:(i+1)*ws].eq(link_layer.rx_rt_data)
for i in range(512//ws)}),
write_data_buffer_cnt.eq(write_data_buffer_cnt + 1)
).Else(
write_data_buffer_cnt.eq(0)
)
# RX->TX
echo_req = Signal()
err_set = Signal()
@ -241,7 +267,7 @@ class RTPacketSatellite(Module):
self.write_address.eq(
rx_dp.packet_as["write"].address),
self.write_data.eq(
rx_dp.packet_as["write"].short_data)
Cat(rx_dp.packet_as["write"].short_data, write_data_buffer))
]
reset = Signal()
@ -287,8 +313,11 @@ class RTPacketSatellite(Module):
NextState("INPUT")
)
rx_fsm.act("WRITE",
self.write_stb.eq(1),
NextState("INPUT")
write_data_buffer_load.eq(1),
If(write_data_buffer_cnt == rx_dp.packet_as["write"].extra_data_cnt,
self.write_stb.eq(1),
NextState("INPUT")
)
)
rx_fsm.act("FIFO_SPACE",
fifo_space_set.eq(1),
@ -309,32 +338,27 @@ class RTPacketSatellite(Module):
)
tx_fsm.act("ECHO",
tx_dp.send("echo_reply"),
tx_dp.stb.eq(1),
If(tx_dp.done, NextState("IDLE"))
If(tx_dp.packet_last, NextState("IDLE"))
)
tx_fsm.act("FIFO_SPACE",
fifo_space_ack.eq(1),
tx_dp.send("fifo_space_reply", space=self.fifo_space),
tx_dp.stb.eq(1),
If(tx_dp.done, NextState("IDLE"))
If(tx_dp.packet_last, NextState("IDLE"))
)
tx_fsm.act("ERROR_WRITE_OVERFLOW",
self.write_overflow_ack.eq(1),
tx_dp.send("error", code=error_codes["write_overflow"]),
tx_dp.stb.eq(1),
If(tx_dp.done, NextState("IDLE"))
If(tx_dp.packet_last, NextState("IDLE"))
)
tx_fsm.act("ERROR_WRITE_UNDERFLOW",
self.write_underflow_ack.eq(1),
tx_dp.send("error", code=error_codes["write_underflow"]),
tx_dp.stb.eq(1),
If(tx_dp.done, NextState("IDLE"))
If(tx_dp.packet_last, NextState("IDLE"))
)
tx_fsm.act("ERROR",
err_ack.eq(1),
tx_dp.send("error", code=err_code),
tx_dp.stb.eq(1),
If(tx_dp.done, NextState("IDLE"))
If(tx_dp.packet_last, NextState("IDLE"))
)
@ -399,7 +423,7 @@ class RTPacketMaster(Module):
self.write_timestamp = Signal(64)
self.write_channel = Signal(16)
self.write_address = Signal(16)
self.write_data = Signal(256)
self.write_data = Signal(512)
# fifo space interface
# write with timestamp[48:] == 0xffff to make a fifo space request
@ -437,23 +461,83 @@ class RTPacketMaster(Module):
# # #
# CDC
# RX/TX datapath
assert len(link_layer.tx_rt_data) == len(link_layer.rx_rt_data)
assert len(link_layer.tx_rt_data) % 8 == 0
ws = len(link_layer.tx_rt_data)
tx_plm = get_m2s_layouts(ws)
tx_dp = ClockDomainsRenamer("rtio")(TransmitDatapath(
link_layer.tx_rt_frame, link_layer.tx_rt_data, tx_plm))
self.submodules += tx_dp
rx_plm = get_s2m_layouts(ws)
rx_dp = ClockDomainsRenamer("rtio_rx")(ReceiveDatapath(
link_layer.rx_rt_frame, link_layer.rx_rt_data, rx_plm))
self.submodules += rx_dp
# Write FIFO and extra data count
wfifo = ClockDomainsRenamer({"write": "sys", "read": "rtio"})(
AsyncFIFO(64+16+16+256, write_fifo_depth))
AsyncFIFO(64+16+16+512, write_fifo_depth))
self.submodules += wfifo
write_timestamp = Signal(64)
write_channel = Signal(16)
write_address = Signal(16)
write_data = Signal(256)
write_timestamp_d = Signal(64)
write_channel_d = Signal(16)
write_address_d = Signal(16)
write_data_d = Signal(512)
self.comb += [
wfifo.we.eq(self.write_stb),
self.write_ack.eq(wfifo.writable),
wfifo.din.eq(Cat(self.write_timestamp, self.write_channel,
self.write_address, self.write_data)),
Cat(write_timestamp, write_channel,
write_address, write_data).eq(wfifo.dout)
Cat(write_timestamp_d, write_channel_d,
write_address_d, write_data_d).eq(wfifo.dout)
]
wfb_readable = Signal()
wfb_re = Signal()
self.comb += wfifo.re.eq(wfifo.readable & (~wfb_readable | wfb_re))
self.sync.rtio += \
If(wfifo.re,
wfb_readable.eq(1),
).Elif(wfb_re,
wfb_readable.eq(0),
)
write_timestamp = Signal(64)
write_channel = Signal(16)
write_address = Signal(16)
write_extra_data_cnt = Signal(8)
write_data = Signal(512)
self.sync.rtio += If(wfifo.re,
write_timestamp.eq(write_timestamp_d),
write_channel.eq(write_channel_d),
write_address.eq(write_address_d),
write_data.eq(write_data_d))
short_data_len = tx_plm.field_length("write", "short_data")
write_extra_data = Signal(512)
self.comb += write_extra_data.eq(write_data[short_data_len:])
for i in range(512//ws):
self.sync.rtio += If(wfifo.re,
If(write_extra_data[ws*i:ws*(i+1)] != 0, write_extra_data_cnt.eq(i+1)))
extra_data_ce = Signal()
extra_data_last = Signal()
extra_data_counter = Signal(max=512//ws+1)
self.comb += [
Case(extra_data_counter,
{i+1: tx_dp.raw_data.eq(write_extra_data[i*ws:(i+1)*ws])
for i in range(512//ws)}),
extra_data_last.eq(extra_data_counter == write_extra_data_cnt)
]
self.sync.rtio += \
If(extra_data_ce,
extra_data_counter.eq(extra_data_counter + 1),
).Else(
extra_data_counter.eq(1)
)
# CDC
fifo_space_not = Signal()
fifo_space = Signal(16)
self.submodules += _CrossDomainNotification("rtio_rx",
@ -485,21 +569,8 @@ class RTPacketMaster(Module):
error_not, error_code,
self.error_not, self.error_not_ack, self.error_code)
# RX/TX datapath
assert len(link_layer.tx_rt_data) == len(link_layer.rx_rt_data)
assert len(link_layer.tx_rt_data) % 8 == 0
ws = len(link_layer.tx_rt_data)
tx_plm = get_m2s_layouts(ws)
tx_dp = ClockDomainsRenamer("rtio")(TransmitDatapath(
link_layer.tx_rt_frame, link_layer.tx_rt_data, tx_plm))
self.submodules += tx_dp
rx_plm = get_s2m_layouts(ws)
rx_dp = ClockDomainsRenamer("rtio_rx")(ReceiveDatapath(
link_layer.rx_rt_frame, link_layer.rx_rt_data, rx_plm))
self.submodules += rx_dp
# TX FSM
tx_fsm = ClockDomainsRenamer("rtio")(FSM(reset_state="IDLE_WRITE"))
tx_fsm = ClockDomainsRenamer("rtio")(FSM(reset_state="IDLE"))
self.submodules += tx_fsm
echo_sent_now = Signal()
@ -508,18 +579,12 @@ class RTPacketMaster(Module):
tsc_value_load = Signal()
self.sync.rtio += If(tsc_value_load, tsc_value.eq(self.tsc_value))
tx_fsm.act("IDLE_WRITE",
tx_dp.send("write",
timestamp=write_timestamp,
channel=write_channel,
address=write_address,
short_data=write_data),
If(wfifo.readable,
tx_fsm.act("IDLE",
If(wfb_readable,
If(write_timestamp[48:] == 0xffff,
NextState("FIFO_SPACE")
).Else(
tx_dp.stb.eq(1),
wfifo.re.eq(tx_dp.done)
NextState("WRITE")
)
).Else(
If(echo_stb,
@ -533,36 +598,56 @@ class RTPacketMaster(Module):
)
)
)
tx_fsm.act("WRITE",
tx_dp.send("write",
timestamp=write_timestamp,
channel=write_channel,
address=write_address,
extra_data_cnt=write_extra_data_cnt,
short_data=write_data[:short_data_len]),
If(tx_dp.packet_last,
If(write_extra_data_cnt == 0,
wfb_re.eq(1),
NextState("IDLE")
).Else(
NextState("WRITE_EXTRA")
)
)
)
tx_fsm.act("WRITE_EXTRA",
tx_dp.raw_stb.eq(1),
extra_data_ce.eq(1),
If(extra_data_last,
wfb_re.eq(1),
NextState("IDLE")
)
)
tx_fsm.act("FIFO_SPACE",
tx_dp.send("fifo_space_request", channel=write_channel),
tx_dp.stb.eq(1),
If(tx_dp.done,
wfifo.re.eq(1),
NextState("IDLE_WRITE")
If(tx_dp.packet_last,
wfb_re.eq(1),
NextState("IDLE")
)
)
tx_fsm.act("ECHO",
tx_dp.send("echo_request"),
tx_dp.stb.eq(1),
If(tx_dp.done,
If(tx_dp.packet_last,
echo_ack.eq(1),
NextState("IDLE_WRITE")
NextState("IDLE")
)
)
tx_fsm.act("SET_TIME",
tx_dp.send("set_time", timestamp=tsc_value),
tx_dp.stb.eq(1),
If(tx_dp.done,
If(tx_dp.packet_last,
set_time_ack.eq(1),
NextState("IDLE_WRITE")
NextState("IDLE")
)
)
tx_fsm.act("RESET",
tx_dp.send("reset", phy=reset_phy),
tx_dp.stb.eq(1),
If(tx_dp.done,
If(tx_dp.packet_last,
reset_ack.eq(1),
NextState("IDLE_WRITE")
NextState("IDLE")
)
)