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Call write from init_write via start_soon so command FIFO size can be limited

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This commit is contained in:
Alex Forencich
2021-12-27 23:29:29 -08:00
parent 9c0592c16a
commit dd345e87c3
2 changed files with 165 additions and 21 deletions
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49
cocotbext/axi/axil_master.py
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@@ -103,6 +103,7 @@ class AxiLiteMasterWrite(Region, Reset):
self.b_channel.queue_occupancy_limit = 2
self.write_command_queue = Queue()
self.write_command_queue.queue_occupancy_limit = 2
self.current_write_command = None
self.int_write_resp_command_queue = Queue()
@@ -161,10 +162,9 @@ class AxiLiteMasterWrite(Region, Reset):
if not self.awprot_present and prot != AxiProt.NONSECURE:
raise ValueError("awprot sideband signal value specified, but signal is not connected")
self.in_flight_operations += 1
self._idle.clear()
data = bytes(data)
self.write_command_queue.put_nowait(AxiLiteWriteCmd(address, bytes(data), prot, event))
cocotb.start_soon(self._write_wrapper(address, bytes(data), prot, event))
return event
@@ -176,10 +176,28 @@ class AxiLiteMasterWrite(Region, Reset):
await self._idle.wait()
async def write(self, address, data, prot=AxiProt.NONSECURE):
event = self.init_write(address, data, prot)
if address < 0 or address >= 2**self.address_width:
raise ValueError("Address out of range")
if isinstance(data, int):
raise ValueError("Expected bytes or bytearray for data")
if not self.awprot_present and prot != AxiProt.NONSECURE:
raise ValueError("awprot sideband signal value specified, but signal is not connected")
event = Event()
data = bytes(data)
self.in_flight_operations += 1
self._idle.clear()
await self.write_command_queue.put(AxiLiteWriteCmd(address, data, prot, event))
await event.wait()
return event.data
async def _write_wrapper(self, address, data, prot, event):
event.set(await self.write(address, data, prot))
def _handle_reset(self, state):
if state:
self.log.info("Reset asserted")
@@ -331,6 +349,7 @@ class AxiLiteMasterRead(Region, Reset):
self.r_channel.queue_occupancy_limit = 2
self.read_command_queue = Queue()
self.read_command_queue.queue_occupancy_limit = 2
self.current_read_command = None
self.int_read_resp_command_queue = Queue()
@@ -382,10 +401,7 @@ class AxiLiteMasterRead(Region, Reset):
if not self.arprot_present and prot != AxiProt.NONSECURE:
raise ValueError("arprot sideband signal value specified, but signal is not connected")
self.in_flight_operations += 1
self._idle.clear()
self.read_command_queue.put_nowait(AxiLiteReadCmd(address, length, prot, event))
cocotb.start_soon(self._read_wrapper(address, length, prot, event))
return event
@@ -397,10 +413,25 @@ class AxiLiteMasterRead(Region, Reset):
await self._idle.wait()
async def read(self, address, length, prot=AxiProt.NONSECURE):
event = self.init_read(address, length, prot)
if address < 0 or address >= 2**self.address_width:
raise ValueError("Address out of range")
if not self.arprot_present and prot != AxiProt.NONSECURE:
raise ValueError("arprot sideband signal value specified, but signal is not connected")
event = Event()
self.in_flight_operations += 1
self._idle.clear()
await self.read_command_queue.put(AxiLiteReadCmd(address, length, prot, event))
await event.wait()
return event.data
async def _read_wrapper(self, address, length, prot, event):
event.set(await self.read(address, length, prot))
def _handle_reset(self, state):
if state:
self.log.info("Reset asserted")