fp16 gemmini support

src/main/scala/radiance/subsystem/Configs.scala

@@ -3,14 +3,17 @@
 
 package radiance.subsystem
 
+import chisel3._
 import chisel3.util._
 import org.chipsalliance.cde.config._
 import freechips.rocketchip.rocket._
 import freechips.rocketchip.tile._
 import freechips.rocketchip.subsystem._
-import gemmini.{CapacityInKilobytes, GemminiFPConfigs}
+import gemmini._
+import gemmini.Arithmetic.FloatArithmetic._
 import radiance.tile._
 import radiance.memory._
+import radiance.subsystem.RadianceGemminiDataType.{BF16, FP16, FP32, Int8}
 
 case class RadianceSharedMemKey(address: BigInt,
                                 size: Int,
@@ -84,9 +87,14 @@ class WithRadianceCores(
   ), useVxCache)
 }
 
-class WithRadianceGemmini(location: HierarchicalLocation,
-                          crossing: RocketCrossingParams,
-                          dim: Int, accSizeInKB: Int, tileSize: Int) extends Config((site, _, up) => {
+object RadianceGemminiDataType extends Enumeration {
+  type Type = Value
+  val FP32, FP16, BF16, Int8 = Value
+}
+
+class WithRadianceGemmini(location: HierarchicalLocation, crossing: RocketCrossingParams,
+                          dim: Int, accSizeInKB: Int, tileSize: Int,
+                          dataType: RadianceGemminiDataType.Type, dmaBytes: Int) extends Config((site, _, up) => {
   case TilesLocated(`location`) => {
     val prev = up(TilesLocated(`location`))
     val idOffset = up(NumTiles)
@@ -100,7 +108,31 @@ class WithRadianceGemmini(location: HierarchicalLocation,
     }.sum
     val smKey = site(RadianceSharedMemKey).get
     val tileParams = GemminiTileParams(
-      gemminiConfig = GemminiFPConfigs.FP32DefaultConfig.copy(
+      gemminiConfig = {
+        implicit val arithmetic: Arithmetic[Float] =
+          Arithmetic.FloatArithmetic.asInstanceOf[Arithmetic[Float]]
+        dataType match {
+        case FP32 => GemminiFPConfigs.FP32DefaultConfig
+        case FP16 => GemminiFPConfigs.FP16DefaultConfig.copy(
+          acc_scale_args = Some(ScaleArguments(
+            (t: Float, u: Float) => {t},
+            1, Float(8, 24), -1, identity = "1.0", c_str = "((x))"
+          )),
+          mvin_scale_args = Some(ScaleArguments(
+            (t: Float, u: Float) => t * u,
+            1, Float(5, 11), -1, identity = "1.0", c_str="((x) * (scale))"
+          )),
+          mvin_scale_acc_args = None,
+          has_training_convs = false,
+          // hardcode_d_to_garbage_addr = true,
+          acc_read_full_width = false, // set to true to output fp32
+        )
+        case BF16 => GemminiFPConfigs.BF16DefaultConfig
+        // TODO: Int8
+      }}.copy(
+        dataflow = Dataflow.WS,
+        ex_read_from_acc = false,
+        ex_write_to_spad = false,
         has_training_convs = false,
         has_max_pool = false,
         use_tl_ext_mem = true,
@@ -112,8 +144,10 @@ class WithRadianceGemmini(location: HierarchicalLocation,
         meshRows = dim,
         meshColumns = dim,
         tile_latency = 0,
+        mesh_output_delay = 1,
+        acc_latency = 3,
         dma_maxbytes = site(CacheBlockBytes),
-        dma_buswidth = 256, // TODO: parameterize
+        dma_buswidth = dmaBytes,
         tl_ext_mem_base = smKey.address,
         sp_banks = smKey.numBanks,
         sp_capacity = CapacityInKilobytes(smKey.size >> 10),
@@ -130,7 +164,8 @@ class WithRadianceGemmini(location: HierarchicalLocation,
   }
   case NumTiles => up(NumTiles) + 1
 }) {
-  def this(location: HierarchicalLocation = InSubsystem, dim: Int, accSizeInKB: Int, tileSize: Int) =
+  def this(location: HierarchicalLocation = InSubsystem, dim: Int, accSizeInKB: Int, tileSize: Int,
+           dataType: RadianceGemminiDataType.Type = RadianceGemminiDataType.FP32, dmaBytes: Int = 256) =
     this(location, RocketCrossingParams(
       master = HierarchicalElementMasterPortParams.locationDefault(location),
       slave = HierarchicalElementSlavePortParams.locationDefault(location),
@@ -138,7 +173,7 @@ class WithRadianceGemmini(location: HierarchicalLocation,
         case InSubsystem => CBUS
         case InCluster(clusterId) => CCBUS(clusterId)
       }
-    ), dim, accSizeInKB, tileSize)
+    ), dim, accSizeInKB, tileSize, dataType, dmaBytes)
 }
 
 class WithRadianceSharedMem(address: BigInt,

src/main/scala/radiance/tile/RadianceCluster.scala

@@ -44,7 +44,10 @@ class RadianceCluster (
   val gemminiTiles = leafTiles.values.filter(_.isInstanceOf[GemminiTile]).toSeq.asInstanceOf[Seq[GemminiTile]]
   val gemminis = gemminiTiles.map(_.gemmini)
   val gemminiConfigs = gemminis.map(_.config)
-  // val gemminiConfig = thisClusterParams.gemminiConfig.get // TODO: handle None gracefully
+
+  if (!(gemminiConfigs.tail.map(_.inputType == gemminiConfigs.head.inputType).reduce(_ && _))) {
+    println("******** WARNING ********\n******** gemmini data types do not match\n******** WARNING ********")
+  }
 
   val radianceTiles = leafTiles.values.filter(_.isInstanceOf[RadianceTile]).toSeq.asInstanceOf[Seq[RadianceTile]]