fix nasti converter tests

groundtest/src/main/scala/nastitest.scala

@@ -15,45 +15,48 @@ abstract class NastiTest(implicit val p: Parameters) extends Module
 
 class NastiBlockTest(implicit p: Parameters) extends NastiTest()(p) {
 
-  val s_start :: s_write :: s_read :: s_wait :: s_finish :: Nil = Enum(Bits(), 5)
+  val (s_start :: s_write_req :: s_write_resp ::
+       s_read_req :: s_read_resp :: s_finish :: Nil) = Enum(Bits(), 6)
   val state = Reg(init = s_start)
 
   val addr_sent = Reg(init = Bool(false))
   val data_sent = Reg(init = UInt(0, mifDataBeats))
-  val write_acked = Reg(init = Bool(false))
   val data_beats = Vec.tabulate(mifDataBeats) { i => UInt(i * 0x20) }
 
   val (r_count, r_done) = Counter(io.mem.r.fire(), mifDataBeats)
   val (w_count, w_done) = Counter(io.mem.w.fire(), mifDataBeats)
 
-  io.mem.aw.valid := (state === s_write) && !addr_sent
+  io.mem.aw.valid := (state === s_write_req) && !addr_sent
   io.mem.aw.bits := NastiWriteAddressChannel(
     id = UInt(0),
     addr = UInt(0),
     len = UInt(mifDataBeats - 1),
     size = UInt(log2Up(mifDataBits / 8)))
 
-  io.mem.w.valid := (state === s_write) && !data_sent.andR
+  io.mem.w.valid := (state === s_write_req) && !data_sent.andR
   io.mem.w.bits := NastiWriteDataChannel(
     data = data_beats(w_count),
     last = w_count === UInt(mifDataBeats - 1))
 
-  io.mem.ar.valid := (state === s_read)
+  io.mem.b.ready := (state === s_write_resp)
+
+  io.mem.ar.valid := (state === s_read_req)
   io.mem.ar.bits := NastiReadAddressChannel(
     id = UInt(1),
     addr = UInt(0),
     len = UInt(mifDataBeats - 1),
     size = UInt(log2Up(mifDataBits / 8)))
 
-  io.mem.r.ready := (state === s_wait)
-  io.mem.b.ready := Bool(true)
+  io.mem.r.ready := (state === s_read_resp)
 
-  when (state === s_start) { state := s_write }
+  when (state === s_start) { state := s_write_req }
 
   when (io.mem.aw.fire()) { addr_sent := Bool(true) }
   when (io.mem.w.fire()) { data_sent := data_sent | UIntToOH(w_count) }
-  when (w_done) { state := s_read }
-  when (io.mem.ar.fire()) { state := s_wait }
+  when (w_done) { state := s_write_resp }
+  when (io.mem.b.fire()) { state := s_read_req }
+
+  when (io.mem.ar.fire()) { state := s_read_resp }
   when (r_done) { state := s_finish }
 
   io.finished := (state === s_finish)
@@ -64,8 +67,8 @@ class NastiBlockTest(implicit p: Parameters) extends NastiTest()(p) {
 
 class NastiSmallTest(implicit p: Parameters) extends NastiTest()(p) {
 
-  val (s_start :: s_write_addr :: s_write_data ::
-       s_read :: s_wait :: s_finish :: Nil) = Enum(Bits(), 6)
+  val (s_start :: s_write_addr :: s_write_data :: s_write_resp ::
+       s_read_req :: s_read_resp :: s_finish :: Nil) = Enum(Bits(), 7)
   val state = Reg(init = s_start)
 
   val write_acked = Reg(init = Bool(false))
@@ -80,44 +83,85 @@ class NastiSmallTest(implicit p: Parameters) extends NastiTest()(p) {
 
   io.mem.w.valid := (state === s_write_data)
   io.mem.w.bits := NastiWriteDataChannel(
-    data = ref_data,
+    data = ref_data << UInt(32),
     last = Bool(true))
 
-  io.mem.ar.valid := (state === s_read)
+  io.mem.ar.valid := (state === s_read_req)
   io.mem.ar.bits := NastiReadAddressChannel(
     id = UInt(1),
     addr = UInt(0x20C),
     len = UInt(0),
     size = UInt("b010"))
 
-  io.mem.r.ready := (state === s_wait)
-  io.mem.b.ready := Bool(true)
+  io.mem.r.ready := (state === s_read_resp)
+  io.mem.b.ready := (state === s_write_resp)
 
   when (state === s_start) { state := s_write_addr }
   when (io.mem.aw.fire()) { state := s_write_data  }
-  when (io.mem.w.fire()) { state := s_read }
-  when (io.mem.ar.fire()) { state := s_wait }
+  when (io.mem.w.fire()) { state := s_write_resp }
+  when (io.mem.b.fire()) { state := s_read_req }
+  when (io.mem.ar.fire()) { state := s_read_resp }
   when (io.mem.r.fire()) { state := s_finish }
 
   io.finished := (state === s_finish)
 
-  assert(!io.mem.r.valid || io.mem.r.bits.data === ref_data,
+  assert(!io.mem.r.valid || io.mem.r.bits.data(63, 32) === ref_data,
     "NASTI Small Test: results do not match")
 }
 
+class NastiSequencer(n: Int)(implicit p: Parameters) extends Module {
+  val io = new Bundle {
+    val in = Vec(n, new NastiIO).flip
+    val out = new NastiIO()
+    val finished = Vec(n, Bool(INPUT))
+  }
+
+  val selection = Reg(init = UInt(0, log2Up(n)))
+  val all_finished = io.finished.reduce(_ && _)
+
+  when (!all_finished && io.finished(selection)) {
+    selection := selection + UInt(1)
+  }
+
+  io.out.ar.valid := io.in(selection).ar.valid
+  io.out.ar.bits := io.in(selection).ar.bits
+
+  io.out.aw.valid := io.in(selection).aw.valid
+  io.out.aw.bits := io.in(selection).aw.bits
+
+  io.out.w.valid := io.in(selection).w.valid
+  io.out.w.bits := io.in(selection).w.bits
+
+  io.out.b.ready := io.in(selection).b.ready
+
+  io.out.r.ready := io.in(selection).r.ready
+
+  for ((in, i) <- io.in.zipWithIndex) {
+    val me = selection === UInt(i)
+    in.ar.ready := io.out.ar.ready && me
+    in.aw.ready := io.out.aw.ready && me
+    in.w.ready  := io.out.w.ready && me
+    in.b.valid  := io.out.b.valid && me
+    in.b.bits   := io.out.b.bits
+    in.r.valid  := io.out.r.valid && me
+    in.r.bits   := io.out.r.bits
+  }
+}
+
 class NastiConverterTest(implicit p: Parameters) extends GroundTest()(p)
     with HasNastiParameters {
   disablePorts(mem = false)
 
   val tests = Seq(Module(new NastiBlockTest), Module(new NastiSmallTest))
 
-  val arbiter = Module(new NastiArbiter(tests.size))
+  val sequencer = Module(new NastiSequencer(tests.size))
   val converter = Module(new TileLinkIONastiIOConverter()(
     p.alterPartial { case TLId => "Outermost" }))
   val widener = Module(new TileLinkIOWidener("Outermost", "L1toL2"))
 
-  arbiter.io.master <> tests.map(_.io.mem)
-  converter.io.nasti <> arbiter.io.slave
+  sequencer.io.in <> tests.map(_.io.mem)
+  sequencer.io.finished := tests.map(_.io.finished)
+  converter.io.nasti <> sequencer.io.out
   widener.io.in <> converter.io.tl
   io.mem <> widener.io.out