remove partial reordering code in master, keep things in bank_reordering branch.

we'll try to stabilize master without reordering, then do some refactoring/adding a test suite to ease adding proper reordering later

litedram/common.py

@@ -2,9 +2,6 @@ from migen import *
 from litex.soc.interconnect import stream
 
 
-bankbits_max = 3
-
-
 class PhySettings:
     def __init__(self, memtype, dfi_databits,
                  nphases,
@@ -77,9 +74,7 @@ def data_layout(data_width):
     return [
         ("wdata",       data_width, DIR_M_TO_S),
         ("wdata_we", data_width//8, DIR_M_TO_S),
-        ("wbank",     bankbits_max, DIR_S_TO_M),
-        ("rdata",       data_width, DIR_S_TO_M),
-        ("rbank",     bankbits_max, DIR_S_TO_M)
+        ("rdata",       data_width, DIR_S_TO_M)
     ]
 
 
@@ -103,24 +98,20 @@ def cmd_description(address_width):
     ]
 
 
-def wdata_description(data_width, with_bank):
+def wdata_description(data_width):
     r = [
         ("data", data_width),
         ("we",   data_width//8)
     ]
-    if with_bank:
-        r += [("bank", bankbits_max)]
     return r
 
-def rdata_description(data_width, with_bank):
+def rdata_description(data_width):
     r = [("data", data_width)]
-    if with_bank:
-        r += [("bank", bankbits_max)]
     return r
 
 
 class LiteDRAMNativePort:
-    def __init__(self, mode, address_width, data_width, clock_domain="sys", id=0, with_bank=False):
+    def __init__(self, mode, address_width, data_width, clock_domain="sys", id=0):
         self.mode = mode
         self.address_width = address_width
         self.data_width = data_width
@@ -130,8 +121,8 @@ class LiteDRAMNativePort:
         self.lock = Signal()
 
         self.cmd = stream.Endpoint(cmd_description(address_width))
-        self.wdata = stream.Endpoint(wdata_description(data_width, with_bank))
-        self.rdata = stream.Endpoint(rdata_description(data_width, with_bank))
+        self.wdata = stream.Endpoint(wdata_description(data_width))
+        self.rdata = stream.Endpoint(rdata_description(data_width))
 
         self.flush = Signal()
 

litedram/core/controller.py

@@ -13,8 +13,7 @@ class ControllerSettings:
                  read_time=32, write_time=16,
                  with_bandwidth=False,
                  with_refresh=True,
-                 with_auto_precharge=True,
-                 with_reordering=False):
+                 with_auto_precharge=True):
         self.cmd_buffer_depth = cmd_buffer_depth
         self.cmd_buffer_buffered = cmd_buffer_buffered
         self.read_time = read_time
@@ -22,7 +21,6 @@ class ControllerSettings:
         self.with_bandwidth = with_bandwidth
         self.with_refresh = with_refresh
         self.with_auto_precharge = with_auto_precharge
-        self.with_reordering = with_reordering
 
 
 class LiteDRAMController(Module):

litedram/frontend/crossbar.py

@@ -49,8 +49,7 @@ class LiteDRAMCrossbar(Module):
             address_width=self.rca_bits + self.bank_bits - self.rank_bits,
             data_width=self.controller.data_width,
             clock_domain="sys",
-            id=len(self.masters),
-            with_bank=self.controller.settings.with_reordering)
+            id=len(self.masters))
         self.masters.append(port)
 
         # clock domain crossing
@@ -60,8 +59,7 @@ class LiteDRAMCrossbar(Module):
                 address_width=port.address_width,
                 data_width=port.data_width,
                 clock_domain=clock_domain,
-                id=port.id,
-                with_bank=self.controller.settings.with_reordering)
+                id=port.id)
             self.submodules += LiteDRAMNativePortCDC(new_port, port)
             port = new_port
 
@@ -76,8 +74,7 @@ class LiteDRAMCrossbar(Module):
                 address_width=port.address_width + addr_shift,
                 data_width=data_width,
                 clock_domain=clock_domain,
-                id=port.id,
-                with_bank=self.controller.settings.with_reordering)
+                id=port.id)
             self.submodules += ClockDomainsRenamer(clock_domain)(LiteDRAMNativePortConverter(new_port, port, reverse))
             port = new_port
 
@@ -107,11 +104,10 @@ class LiteDRAMCrossbar(Module):
             master_locked = []
             for nm, master in enumerate(self.masters):
                 locked = Signal()
-                if not self.controller.settings.with_reordering:
-                    for other_nb, other_arbiter in enumerate(arbiters):
-                        if other_nb != nb:
-                            other_bank = getattr(controller, "bank"+str(other_nb))
-                            locked = locked | (other_bank.lock & (other_arbiter.grant == nm))
+                for other_nb, other_arbiter in enumerate(arbiters):
+                    if other_nb != nb:
+                        other_bank = getattr(controller, "bank"+str(other_nb))
+                        locked = locked | (other_bank.lock & (other_arbiter.grant == nm))
                 master_locked.append(locked)
 
             # arbitrate
@@ -158,17 +154,6 @@ class LiteDRAMCrossbar(Module):
                     master_rdata_valid = new_master_rdata_valid
                 master_rdata_valids[nm] = master_rdata_valid
 
-        # Delay bank output to match rvalid
-        for i in range(self.read_latency-1):
-            new_master_rbank = Signal(max=self.nbanks)
-            self.sync += new_master_rbank.eq(rbank)
-            rbank = new_master_rbank
-        # Delay wbank output to match wready
-        for i in range(self.write_latency-1):
-            new_master_wbank = Signal(max=self.nbanks)
-            self.sync += new_master_wbank.eq(wbank)
-            wbank = new_master_wbank
-
         for master, master_ready in zip(self.masters, master_readys):
             self.comb += master.cmd.ready.eq(master_ready)
         for master, master_wdata_ready in zip(self.masters, master_wdata_readys):
@@ -192,9 +177,6 @@ class LiteDRAMCrossbar(Module):
         # route data reads
         for master in self.masters:
             self.comb += master.rdata.data.eq(self.controller.rdata)
-            if hasattr(master.rdata, "bank"):
-                self.comb += master.rdata.bank.eq(rbank)
-                self.comb += master.wdata.bank.eq(wbank)
 
     def split_master_addresses(self, bank_bits, rca_bits, cba_shift):
         m_ba = [] # bank address

litedram/frontend/dma.py

@@ -83,7 +83,7 @@ class LiteDRAMDMAReader(Module):
         self.submodules += fifo
 
         self.comb += [
-            rdata.connect(fifo.sink, omit={"bank", "id", "resp"}),
+            rdata.connect(fifo.sink, omit={"id", "resp"}),
             fifo.source.connect(source),
             data_dequeued.eq(source.valid & source.ready)
         ]

litedram/frontend/ecc.py

@@ -211,7 +211,7 @@ class LiteDRAMNativePortECC(Module, AutoCSR):
         ecc_wdata = BufferizeEndpoints({"source": DIR_SOURCE})(ecc_wdata)
         self.submodules += ecc_wdata
         self.comb += [
-            port_from.wdata.connect(ecc_wdata.sink, omit={"bank"}),
+            port_from.wdata.connect(ecc_wdata.sink),
             ecc_wdata.source.connect(port_to.wdata)
         ]
 
@@ -223,7 +223,7 @@ class LiteDRAMNativePortECC(Module, AutoCSR):
         self.submodules += ecc_rdata
         self.comb += [
             ecc_rdata.enable.eq(self.enable.storage),
-            port_to.rdata.connect(ecc_rdata.sink, omit={"bank"}),
+            port_to.rdata.connect(ecc_rdata.sink),
             ecc_rdata.source.connect(port_from.rdata)
         ]