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| /* | ||
| * Copyright (c) 2023, Advanced Micro Devices, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * Author: Eddie Hung, Advanced Micro Devices, Inc. | ||
| * | ||
| * This file is part of RapidWright. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
|
|
||
| package com.xilinx.rapidwright.rwroute; | ||
|
|
||
| import com.xilinx.rapidwright.device.IntentCode; | ||
| import com.xilinx.rapidwright.device.Node; | ||
| import com.xilinx.rapidwright.device.Tile; | ||
| import com.xilinx.rapidwright.device.TileTypeEnum; | ||
| import com.xilinx.rapidwright.device.Wire; | ||
| import com.xilinx.rapidwright.util.Utils; | ||
|
|
||
| public class RouteNodeInfo { | ||
| public final RouteNodeType type; | ||
| public final short endTileXCoordinate; | ||
| public final short endTileYCoordinate; | ||
| public final short length; | ||
|
|
||
| private RouteNodeInfo(RouteNodeType type, | ||
| short endTileXCoordinate, | ||
| short endTileYCoordinate, | ||
| short length) { | ||
| this.type = type; | ||
| this.endTileXCoordinate = endTileXCoordinate; | ||
| this.endTileYCoordinate = endTileYCoordinate; | ||
| this.length = length; | ||
| } | ||
|
|
||
| public static RouteNodeInfo get(Node node) { | ||
| Wire[] wires = node.getAllWiresInNode(); | ||
| Tile baseTile = node.getTile(); | ||
| TileTypeEnum baseType = baseTile.getTileTypeEnum(); | ||
| Tile endTile = null; | ||
| boolean pinfeedIntoLaguna = false; | ||
| for (Wire w : wires) { | ||
| Tile tile = w.getTile(); | ||
| TileTypeEnum tileType = tile.getTileTypeEnum(); | ||
| boolean lagunaTile = false; | ||
| if (tileType == TileTypeEnum.INT || | ||
| (lagunaTile = Utils.isLaguna(tileType))) { | ||
| if (!lagunaTile || | ||
| // Only consider a Laguna tile as an end tile if base tile is Laguna too | ||
| // (otherwise it's a PINFEED into a Laguna) | ||
| Utils.isLaguna(baseType)) { | ||
| boolean endTileWasNotNull = (endTile != null); | ||
| endTile = tile; | ||
| // Break if this is the second INT tile | ||
| if (endTileWasNotNull) break; | ||
| } else { | ||
| assert(!Utils.isLaguna(baseType)); | ||
| pinfeedIntoLaguna = (node.getIntentCode() == IntentCode.NODE_PINFEED); | ||
| } | ||
| } | ||
| } | ||
| if (endTile == null) { | ||
| endTile = node.getTile(); | ||
| } | ||
|
|
||
| RouteNodeType type = getType(node, endTile, pinfeedIntoLaguna); | ||
| short endTileXCoordinate = getEndTileXCoordinate(node, type, (short) endTile.getTileXCoordinate()); | ||
| short endTileYCoordinate = (short) endTile.getTileYCoordinate(); | ||
| short length = getLength(baseTile, type, endTileXCoordinate, endTileYCoordinate); | ||
|
|
||
| return new RouteNodeInfo(type, endTileXCoordinate, endTileYCoordinate, length); | ||
| } | ||
|
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||
| private static short getLength(Tile baseTile, RouteNodeType type, short endTileXCoordinate, short endTileYCoordinate) { | ||
| short length = (short) (Math.abs(endTileXCoordinate - baseTile.getTileXCoordinate()) | ||
| + Math.abs(endTileYCoordinate - baseTile.getTileYCoordinate())); | ||
| switch (baseTile.getTileTypeEnum()) { | ||
| case LAG_LAG: | ||
| length--; | ||
| // Fall through | ||
| case LAGUNA_TILE: | ||
| if (type == RouteNodeType.SUPER_LONG_LINE) { | ||
| assert(length == RouteNodeGraph.SUPER_LONG_LINE_LENGTH_IN_TILES); | ||
| } else { | ||
| assert(length == 0); | ||
| } | ||
| break; | ||
| case INT: | ||
| if (type == RouteNodeType.LAGUNA_I) { | ||
| assert(length == 0); | ||
| } | ||
| } | ||
| return length; | ||
| } | ||
|
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||
| private static short getEndTileXCoordinate(Node node, RouteNodeType type, short endTileXCoordinate) { | ||
| Tile baseTile = node.getTile(); | ||
| TileTypeEnum baseType = baseTile.getTileTypeEnum(); | ||
| switch (baseType) { | ||
| case LAG_LAG: // UltraScale+ only | ||
| // Correct the X coordinate of all Laguna nodes since they are accessed by the INT | ||
| // tile to its right, yet the LAG tile has a tile X coordinate one less than this. | ||
| // Do not apply this correction for NODE_LAGUNA_OUTPUT nodes (which the fanin and | ||
| // fanout nodes of the SLL are marked as) unless it is a fanin (LAGUNA_I) | ||
| // (i.e. do not apply it to the fanout nodes). | ||
| // Nor apply it to VCC_WIREs since their end tiles are INT tiles. | ||
| if ((node.getIntentCode() != IntentCode.NODE_LAGUNA_OUTPUT || type == RouteNodeType.LAGUNA_I) && | ||
| !node.isTiedToVcc()) { | ||
| assert(baseTile.getTileXCoordinate() == endTileXCoordinate); | ||
| endTileXCoordinate++; | ||
| } | ||
| break; | ||
| case LAGUNA_TILE: // UltraScale only | ||
| // In UltraScale, Laguna tiles have the same X as the base INT tile | ||
| assert(baseTile.getTileXCoordinate() == endTileXCoordinate); | ||
| break; | ||
| } | ||
| return endTileXCoordinate; | ||
| } | ||
|
|
||
| private static RouteNodeType getType(Node node, Tile endTile, boolean pinfeedIntoLaguna) { | ||
| // NOTE: IntentCode is device-dependent | ||
| IntentCode ic = node.getIntentCode(); | ||
| switch (ic) { | ||
| case NODE_PINBOUNCE: | ||
| return RouteNodeType.PINBOUNCE; | ||
|
|
||
| case NODE_PINFEED: | ||
| return pinfeedIntoLaguna ? RouteNodeType.LAGUNA_I : RouteNodeType.PINFEED_I; | ||
|
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| case NODE_LAGUNA_OUTPUT: // UltraScale+ only | ||
| assert(node.getTile().getTileTypeEnum() == TileTypeEnum.LAG_LAG); | ||
| if (node.getWireName().endsWith("_TXOUT")) { | ||
| return RouteNodeType.LAGUNA_I; | ||
| } | ||
| break; | ||
|
|
||
| case NODE_LAGUNA_DATA: // UltraScale+ only | ||
| assert(node.getTile().getTileTypeEnum() == TileTypeEnum.LAG_LAG); | ||
| if (node.getTile() != endTile) { | ||
| return RouteNodeType.SUPER_LONG_LINE; | ||
| } | ||
|
|
||
| // U-turn node at the boundary of the device | ||
| break; | ||
|
|
||
| case INTENT_DEFAULT: | ||
| if (node.getTile().getTileTypeEnum() == TileTypeEnum.LAGUNA_TILE) { // UltraScale only | ||
| String wireName = node.getWireName(); | ||
| if (wireName.startsWith("UBUMP")) { | ||
| assert(node.getTile() != endTile); | ||
| return RouteNodeType.SUPER_LONG_LINE; | ||
| } else if (wireName.endsWith("_TXOUT")) { | ||
| // This is the inner LAGUNA_I, mark it so it gets a base cost discount | ||
| return RouteNodeType.LAGUNA_I; | ||
| } | ||
| } | ||
| break; | ||
| } | ||
|
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||
| return RouteNodeType.WIRE; | ||
| } | ||
| } |