Store SFD transfer sim time

README.md

@@ -120,6 +120,7 @@ Attributes:
 * `data`: bytearray
 * `error`: error field, optional; list, each entry qualifies the corresponding entry in `data`.
 * `sim_time_start`: simulation time of first transfer cycle of frame.
+* `sim_time_sfd`: simulation time at which the SFD was transferred.
 * `sim_time_end`: simulation time of last transfer cycle of frame.
 * `start_lane`: byte lane in which the start control character was transferred.
 * `tx_complete`: event or callable triggered when frame is transmitted.
@@ -387,6 +388,7 @@ Attributes:
 * `data`: bytearray
 * `ctrl`: control field, optional; list, each entry qualifies the corresponding entry in `data` as an XGMII control character.
 * `sim_time_start`: simulation time of first transfer cycle of frame.
+* `sim_time_sfd`: simulation time at which the SFD was transferred.
 * `sim_time_end`: simulation time of last transfer cycle of frame.
 * `start_lane`: byte lane in which the start control character was transferred.
 * `tx_complete`: event or callable triggered when frame is transmitted.

cocotbext/eth/gmii.py

@@ -41,6 +41,7 @@ class GmiiFrame:
         self.data = bytearray()
         self.error = None
         self.sim_time_start = None
+        self.sim_time_sfd = None
         self.sim_time_end = None
         self.tx_complete = None
 
@@ -48,6 +49,7 @@ class GmiiFrame:
             self.data = bytearray(data.data)
             self.error = data.error
             self.sim_time_start = data.sim_time_start
+            self.sim_time_sfd = data.sim_time_sfd
             self.sim_time_end = data.sim_time_end
             self.tx_complete = data.tx_complete
         else:
@@ -114,6 +116,7 @@ class GmiiFrame:
             f"{type(self).__name__}(data={self.data!r}, "
             f"error={self.error!r}, "
             f"sim_time_start={self.sim_time_start!r}, "
+            f"sim_time_sfd={self.sim_time_sfd!r}, "
             f"sim_time_end={self.sim_time_end!r})"
         )
 
@@ -253,7 +256,10 @@ class GmiiSource(Reset):
                     self.active = True
 
                 if frame is not None:
-                    self.data <= frame.data.pop(0)
+                    d = frame.data.pop(0)
+                    if frame.sim_time_sfd is None and d in (EthPre.SFD, 0xD):
+                        frame.sim_time_sfd = get_sim_time()
+                    self.data <= d
                     if self.er is not None:
                         self.er <= frame.error.pop(0)
                     self.dv <= 1
@@ -420,6 +426,9 @@ class GmiiSink(Reset):
                         frame = None
 
                 if frame is not None:
+                    if frame.sim_time_sfd is None and d_val in (EthPre.SFD, 0xD):
+                        frame.sim_time_sfd = get_sim_time()
+
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 

cocotbext/eth/mii.py

@@ -155,7 +155,10 @@ class MiiSource(Reset):
                     self.active = True
 
                 if frame is not None:
-                    self.data <= frame.data.pop(0)
+                    d = frame.data.pop(0)
+                    if frame.sim_time_sfd is None and d == 0xD:
+                        frame.sim_time_sfd = get_sim_time()
+                    self.data <= d
                     if self.er is not None:
                         self.er <= frame.error.pop(0)
                     self.dv <= 1
@@ -314,6 +317,9 @@ class MiiSink(Reset):
                         frame = None
 
                 if frame is not None:
+                    if frame.sim_time_sfd is None and d_val == 0xD:
+                        frame.sim_time_sfd = get_sim_time()
+
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 

cocotbext/eth/rgmii.py

@@ -166,6 +166,9 @@ class RgmiiSource(Reset):
                     er = frame.error.pop(0)
                     en = 1
 
+                    if frame.sim_time_sfd is None and d in (EthPre.SFD, 0xD, 0xDD):
+                        frame.sim_time_sfd = get_sim_time()
+
                     if not frame.data:
                         ifg_cnt = max(self.ifg, 1)
                         frame.sim_time_end = get_sim_time()
@@ -339,6 +342,9 @@ class RgmiiSink(Reset):
                         frame = None
 
                 if frame is not None:
+                    if frame.sim_time_sfd is None and d_val in (EthPre.SFD, 0xD, 0xDD):
+                        frame.sim_time_sfd = get_sim_time()
+
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 

cocotbext/eth/xgmii.py

@@ -41,6 +41,7 @@ class XgmiiFrame:
         self.data = bytearray()
         self.ctrl = None
         self.sim_time_start = None
+        self.sim_time_sfd = None
         self.sim_time_end = None
         self.start_lane = None
         self.tx_complete = None
@@ -49,6 +50,7 @@ class XgmiiFrame:
             self.data = bytearray(data.data)
             self.ctrl = data.ctrl
             self.sim_time_start = data.sim_time_start
+            self.sim_time_sfd = data.sim_time_sfd
             self.sim_time_end = data.sim_time_end
             self.start_lane = data.start_lane
             self.tx_complete = data.tx_complete
@@ -116,6 +118,7 @@ class XgmiiFrame:
             f"{type(self).__name__}(data={self.data!r}, "
             f"ctrl={self.ctrl!r}, "
             f"sim_time_start={self.sim_time_start!r}, "
+            f"sim_time_sfd={self.sim_time_sfd!r}, "
             f"sim_time_end={self.sim_time_end!r}, "
             f"start_lane={self.start_lane!r})"
         )
@@ -281,7 +284,10 @@ class XgmiiSource(Reset):
 
                     for k in range(self.byte_width):
                         if frame is not None:
-                            d_val |= frame.data.pop(0) << k*8
+                            d = frame.data.pop(0)
+                            if frame.sim_time_sfd is None and d == EthPre.SFD:
+                                frame.sim_time_sfd = get_sim_time()
+                            d_val |= d << k*8
                             c_val |= frame.ctrl.pop(0) << k
 
                             if not frame.data:
@@ -422,5 +428,8 @@ class XgmiiSink(Reset):
 
                             frame = None
                         else:
+                            if frame.sim_time_sfd is None and d_val == EthPre.SFD:
+                                frame.sim_time_sfd = get_sim_time()
+
                             frame.data.append(d_val)
                             frame.ctrl.append(c_val)