bslathi19/cocotbext-axi
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Improve burst handling in AXI master

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This commit is contained in:
Alex Forencich
2021-03-25 18:03:36 -07:00
parent babe69f4d3
commit b5b6df84fe
1 changed files with 20 additions and 13 deletions
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33
cocotbext/axi/axi_master.py
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@@ -387,7 +387,6 @@ class AxiMasterWrite(Reset):
for burst_length in cmd.burst_list:
b = await self.int_write_resp_queue_list[bid].get()
burst_id = int(b.bid)
burst_resp = AxiResp(b.bresp)
burst_user = int(b.buser)
@@ -402,7 +401,7 @@ class AxiMasterWrite(Reset):
self.active_id[bid] -= 1
self.log.info("Write burst complete bid: 0x%x bresp: %s", burst_id, burst_resp)
self.log.info("Write burst complete bid: 0x%x bresp: %s", bid, burst_resp)
self.log.info("Write complete addr: 0x%08x prot: %s resp: %s length: %d",
cmd.address, cmd.prot, resp, cmd.length)
@@ -685,15 +684,27 @@ class AxiMasterRead(Reset):
self.current_read_command = None
async def _process_read_resp(self):
burst = []
cur_rid = None
while True:
r = await self.r_channel.recv()
rid = int(r.rid)
if cur_rid is not None and cur_rid != rid:
raise Exception(f"ID not constant within burst (expected {cur_rid}, got {rid})")
if self.active_id[rid] <= 0:
raise Exception(f"Unexpected burst ID {rid}")
await self.int_read_resp_queue_list[rid].put(r)
burst.append(r)
cur_rid = rid
if int(r.rlast):
await self.int_read_resp_queue_list[rid].put(burst)
burst = []
cur_rid = None
async def _process_read_resp_id(self, rid):
while True:
@@ -716,13 +727,14 @@ class AxiMasterRead(Reset):
first = True
for burst_length in cmd.burst_list:
for k in range(burst_length):
r = await self.int_read_resp_queue_list[rid].get()
burst = await self.int_read_resp_queue_list[rid].get()
cycle_id = int(r.rid)
if len(burst) != burst_length:
raise Exception(f"Burst length incorrect (ID {rid}, expected {burst_length}, got {len(burst)}")
for r in burst:
cycle_data = int(r.rdata)
cycle_resp = AxiResp(r.rresp)
cycle_last = int(r.rlast)
cycle_user = int(r.ruser)
if cycle_resp != AxiResp.OKAY:
@@ -737,8 +749,6 @@ class AxiMasterRead(Reset):
if first:
start = start_offset
assert cycle_last == (k == burst_length - 1)
for j in range(start, stop):
data.append((cycle_data >> j*8) & 0xff)
@@ -746,12 +756,9 @@ class AxiMasterRead(Reset):
first = False
if self.active_id[rid] <= 0:
raise Exception(f"Unexpected burst ID {rid}")
self.active_id[rid] -= 1
self.log.info("Read burst complete rid: 0x%x rresp: %s", cycle_id, resp)
self.log.info("Read burst complete rid: 0x%x rresp: %s", rid, resp)
data = data[:cmd.length]