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eth: Add support for SGMII symbol replication to BASE-X source model

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2026-07-09 11:48:28 -07:00
parent 550fac40ec
commit 1636dbecc4
1 changed files with 25 additions and 4 deletions
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29
src/eth/tb/basex.py
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@@ -155,6 +155,8 @@ class BaseXSerdesSource():
self.queue_occupancy_limit_bytes = -1
self.queue_occupancy_limit_frames = -1
self.gmii_rep_count = 0
self.an_cfg = None
self.width = len(self.data)
@@ -279,6 +281,12 @@ class BaseXSerdesSource():
async def wait(self):
await self.idle_event.wait()
def set_gmii_rep_count(self, rep=0):
self.gmii_rep_count = int(rep)
def get_gmii_rep_count(self):
return self.gmii_rep_count
def set_an_cfg(self, cfg=None):
self.an_cfg = cfg
@@ -288,6 +296,7 @@ class BaseXSerdesSource():
rd = False
odd = False
carrier_extend = False
sof = False
in_pre = False
ifg_cnt = 0
deficit_idle_cnt = 0
@@ -306,6 +315,8 @@ class BaseXSerdesSource():
an_cfg = []
an_phase = False
rep_cnt = 0
while True:
await clock_edge_event
@@ -372,7 +383,7 @@ class BaseXSerdesSource():
carrier_extend = False
if frame is None:
if ifg_cnt > 1 or (not self.enable_dic and ifg_cnt > 0) or odd:
if ifg_cnt > 1 or (not self.enable_dic and ifg_cnt > 0) or odd or rep_cnt != 0:
# in IFG
pass
@@ -397,6 +408,7 @@ class BaseXSerdesSource():
ifg_cnt = 0
self.active = True
frame_offset = 0
sof = True
in_pre = True
else:
# nothing to send
@@ -405,7 +417,9 @@ class BaseXSerdesSource():
if frame is None:
# idle
if ifg_cnt > 0:
if rep_cnt > 0:
pass
elif ifg_cnt > 0:
ifg_cnt -= 1
elif deficit_idle_cnt > 0:
deficit_idle_cnt -= 1
@@ -414,10 +428,11 @@ class BaseXSerdesSource():
d_val = an_cfg.pop(0)
k_val = False
elif frame is not None:
if frame_offset == 0:
if sof:
# /S/
d_val = XgmiiCtrl.START # /K27.7/
k_val = True
sof = False
elif frame_offset >= len(frame.data):
# /T/
d_val = XgmiiCtrl.TERM # /K29.7/
@@ -442,7 +457,8 @@ class BaseXSerdesSource():
else:
d_val = d # /Dx.y/
k_val = False
frame_offset += 1
if rep_cnt == 0:
frame_offset += 1
elif self.an_cfg is not None and odd:
self.log.info("TX config reg: 0x%04x", self.an_cfg)
an_cfg = [self.an_cfg & 0xff, (self.an_cfg >> 8) & 0xff]
@@ -465,6 +481,11 @@ class BaseXSerdesSource():
odd = not odd
rd = rd ^ rd_flip_8b10b(d_val, k_val)
if rep_cnt > 0:
rep_cnt -= 1
elif self.gmii_rep_count and odd:
rep_cnt = self.gmii_rep_count
# if self.slip is not None and self.slip.value:
# self.bit_offset += 1