io_device.cc revision 3090
1545SN/A/* 22512SN/A * Copyright (c) 2006 The Regents of The University of Michigan 3545SN/A * All rights reserved. 4545SN/A * 5545SN/A * Redistribution and use in source and binary forms, with or without 6545SN/A * modification, are permitted provided that the following conditions are 7545SN/A * met: redistributions of source code must retain the above copyright 8545SN/A * notice, this list of conditions and the following disclaimer; 9545SN/A * redistributions in binary form must reproduce the above copyright 10545SN/A * notice, this list of conditions and the following disclaimer in the 11545SN/A * documentation and/or other materials provided with the distribution; 12545SN/A * neither the name of the copyright holders nor the names of its 13545SN/A * contributors may be used to endorse or promote products derived from 14545SN/A * this software without specific prior written permission. 15545SN/A * 16545SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17545SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18545SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19545SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20545SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21545SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22545SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23545SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24545SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25545SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26545SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 292665Ssaidi@eecs.umich.edu * Nathan Binkert 30545SN/A */ 31545SN/A 323090Sstever@eecs.umich.edu#include "base/chunk_generator.hh" 332657Ssaidi@eecs.umich.edu#include "base/trace.hh" 34545SN/A#include "dev/io_device.hh" 35679SN/A#include "sim/builder.hh" 362901Ssaidi@eecs.umich.edu#include "sim/system.hh" 37545SN/A 382489SN/A 392901Ssaidi@eecs.umich.eduPioPort::PioPort(PioDevice *dev, System *s, std::string pname) 402914Ssaidi@eecs.umich.edu : SimpleTimingPort(dev->name() + pname), device(dev), sys(s) 412489SN/A{ } 422489SN/A 432489SN/A 442489SN/ATick 452630SN/APioPort::recvAtomic(Packet *pkt) 462489SN/A{ 472489SN/A return device->recvAtomic(pkt); 482489SN/A} 492489SN/A 502489SN/Avoid 512630SN/APioPort::recvFunctional(Packet *pkt) 522489SN/A{ 532489SN/A device->recvAtomic(pkt); 542489SN/A} 552489SN/A 562489SN/Avoid 572521SN/APioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 582489SN/A{ 592521SN/A snoop.clear(); 602521SN/A device->addressRanges(resp); 612489SN/A} 622489SN/A 632489SN/A 642384SN/Abool 652630SN/APioPort::recvTiming(Packet *pkt) 662384SN/A{ 672784Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 682846Ssaidi@eecs.umich.edu resendNacked(pkt); 692784Ssaidi@eecs.umich.edu } else { 702784Ssaidi@eecs.umich.edu Tick latency = device->recvAtomic(pkt); 712784Ssaidi@eecs.umich.edu // turn packet around to go back to requester 722784Ssaidi@eecs.umich.edu pkt->makeTimingResponse(); 732784Ssaidi@eecs.umich.edu sendTiming(pkt, latency); 742784Ssaidi@eecs.umich.edu } 752641Sstever@eecs.umich.edu return true; 762384SN/A} 77545SN/A 78545SN/APioDevice::~PioDevice() 79545SN/A{ 802384SN/A if (pioPort) 812489SN/A delete pioPort; 82545SN/A} 83545SN/A 842542SN/Avoid 852541SN/APioDevice::init() 862541SN/A{ 872541SN/A if (!pioPort) 882541SN/A panic("Pio port not connected to anything!"); 892541SN/A pioPort->sendStatusChange(Port::RangeChange); 902541SN/A} 912541SN/A 922901Ssaidi@eecs.umich.edu 932901Ssaidi@eecs.umich.eduunsigned int 942901Ssaidi@eecs.umich.eduPioDevice::drain(Event *de) 952901Ssaidi@eecs.umich.edu{ 962901Ssaidi@eecs.umich.edu unsigned int count; 972901Ssaidi@eecs.umich.edu count = pioPort->drain(de); 982901Ssaidi@eecs.umich.edu if (count) 992901Ssaidi@eecs.umich.edu changeState(Draining); 1002901Ssaidi@eecs.umich.edu else 1012901Ssaidi@eecs.umich.edu changeState(Drained); 1022901Ssaidi@eecs.umich.edu return count; 1032901Ssaidi@eecs.umich.edu} 1042901Ssaidi@eecs.umich.edu 1052539SN/Avoid 1062539SN/ABasicPioDevice::addressRanges(AddrRangeList &range_list) 1072539SN/A{ 1082539SN/A assert(pioSize != 0); 1092539SN/A range_list.clear(); 1102539SN/A range_list.push_back(RangeSize(pioAddr, pioSize)); 1112539SN/A} 1122539SN/A 1132489SN/A 1142901Ssaidi@eecs.umich.eduDmaPort::DmaPort(DmaDevice *dev, System *s) 1152901Ssaidi@eecs.umich.edu : Port(dev->name() + "-dmaport"), device(dev), sys(s), pendingCount(0), 1162901Ssaidi@eecs.umich.edu actionInProgress(0), drainEvent(NULL) 1172489SN/A{ } 1182489SN/A 1192489SN/Abool 1202630SN/ADmaPort::recvTiming(Packet *pkt) 1212384SN/A{ 1222685Ssaidi@eecs.umich.edu 1232685Ssaidi@eecs.umich.edu 1242685Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 1252685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n", 1262685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1272685Ssaidi@eecs.umich.edu pkt->reinitNacked(); 1282685Ssaidi@eecs.umich.edu sendDma(pkt, true); 1292685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1302565SN/A DmaReqState *state; 1312685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n", 1322685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1332641Sstever@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1342685Ssaidi@eecs.umich.edu pendingCount--; 1352685Ssaidi@eecs.umich.edu 1362685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1372657Ssaidi@eecs.umich.edu assert(state); 1382685Ssaidi@eecs.umich.edu 1392685Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 1402685Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 1412685Ssaidi@eecs.umich.edu state->completionEvent->process(); 1422685Ssaidi@eecs.umich.edu delete state; 1432685Ssaidi@eecs.umich.edu } 1442630SN/A delete pkt->req; 1452630SN/A delete pkt; 1462901Ssaidi@eecs.umich.edu 1472901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 1482901Ssaidi@eecs.umich.edu drainEvent->process(); 1492901Ssaidi@eecs.umich.edu drainEvent = NULL; 1502901Ssaidi@eecs.umich.edu } 1512569SN/A } else { 1522685Ssaidi@eecs.umich.edu panic("Got packet without sender state... huh?\n"); 1532565SN/A } 1542569SN/A 1552657Ssaidi@eecs.umich.edu return true; 1562384SN/A} 157679SN/A 1582521SN/ADmaDevice::DmaDevice(Params *p) 1592565SN/A : PioDevice(p), dmaPort(NULL) 1602565SN/A{ } 1612384SN/A 1622901Ssaidi@eecs.umich.edu 1632901Ssaidi@eecs.umich.eduunsigned int 1642901Ssaidi@eecs.umich.eduDmaDevice::drain(Event *de) 1652901Ssaidi@eecs.umich.edu{ 1662901Ssaidi@eecs.umich.edu unsigned int count; 1672901Ssaidi@eecs.umich.edu count = pioPort->drain(de) + dmaPort->drain(de); 1682901Ssaidi@eecs.umich.edu if (count) 1692901Ssaidi@eecs.umich.edu changeState(Draining); 1702901Ssaidi@eecs.umich.edu else 1712901Ssaidi@eecs.umich.edu changeState(Drained); 1722901Ssaidi@eecs.umich.edu return count; 1732901Ssaidi@eecs.umich.edu} 1742901Ssaidi@eecs.umich.edu 1752901Ssaidi@eecs.umich.eduunsigned int 1762901Ssaidi@eecs.umich.eduDmaPort::drain(Event *de) 1772901Ssaidi@eecs.umich.edu{ 1782901Ssaidi@eecs.umich.edu if (pendingCount == 0) 1792901Ssaidi@eecs.umich.edu return 0; 1802901Ssaidi@eecs.umich.edu drainEvent = de; 1812901Ssaidi@eecs.umich.edu return 1; 1822901Ssaidi@eecs.umich.edu} 1832901Ssaidi@eecs.umich.edu 1842901Ssaidi@eecs.umich.edu 1852384SN/Avoid 1862489SN/ADmaPort::recvRetry() 1872489SN/A{ 1882489SN/A Packet* pkt = transmitList.front(); 1892659Ssaidi@eecs.umich.edu bool result = true; 1902659Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 1912659Ssaidi@eecs.umich.edu DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n", 1922659Ssaidi@eecs.umich.edu pkt, pkt->senderState); 1932659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 1942659Ssaidi@eecs.umich.edu if (result) { 1952659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 1962659Ssaidi@eecs.umich.edu transmitList.pop_front(); 1972659Ssaidi@eecs.umich.edu } else { 1982659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 1992659Ssaidi@eecs.umich.edu } 2002657Ssaidi@eecs.umich.edu } 2012489SN/A} 2022641Sstever@eecs.umich.edu 2032641Sstever@eecs.umich.edu 2042489SN/Avoid 2052641Sstever@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 2062641Sstever@eecs.umich.edu uint8_t *data) 2072384SN/A{ 2082384SN/A assert(event); 2092384SN/A 2102901Ssaidi@eecs.umich.edu assert(device->getState() == SimObject::Running); 2112901Ssaidi@eecs.umich.edu 2122685Ssaidi@eecs.umich.edu DmaReqState *reqState = new DmaReqState(event, this, size); 2132384SN/A 2142406SN/A for (ChunkGenerator gen(addr, size, peerBlockSize()); 2152406SN/A !gen.done(); gen.next()) { 2162663Sstever@eecs.umich.edu Request *req = new Request(gen.addr(), gen.size(), 0); 2172641Sstever@eecs.umich.edu Packet *pkt = new Packet(req, cmd, Packet::Broadcast); 2182641Sstever@eecs.umich.edu 2192384SN/A // Increment the data pointer on a write 2202566SN/A if (data) 2212685Ssaidi@eecs.umich.edu pkt->dataStatic(data + gen.complete()); 2222641Sstever@eecs.umich.edu 2232685Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2242641Sstever@eecs.umich.edu 2252565SN/A assert(pendingCount >= 0); 2262565SN/A pendingCount++; 2272566SN/A sendDma(pkt); 2282384SN/A } 2292901Ssaidi@eecs.umich.edu 2302384SN/A} 2312384SN/A 2322384SN/A 2332384SN/Avoid 2342685Ssaidi@eecs.umich.eduDmaPort::sendDma(Packet *pkt, bool front) 2352384SN/A{ 2362901Ssaidi@eecs.umich.edu // some kind of selction between access methods 2372901Ssaidi@eecs.umich.edu // more work is going to have to be done to make 2382901Ssaidi@eecs.umich.edu // switching actually work 2392902Ssaidi@eecs.umich.edu 2402901Ssaidi@eecs.umich.edu System::MemoryMode state = sys->getMemoryMode(); 2412901Ssaidi@eecs.umich.edu if (state == System::Timing) { 2422901Ssaidi@eecs.umich.edu DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n", 2432901Ssaidi@eecs.umich.edu pkt, pkt->getAddr()); 2442901Ssaidi@eecs.umich.edu if (transmitList.size() || !sendTiming(pkt)) { 2452901Ssaidi@eecs.umich.edu if (front) 2462901Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2472901Ssaidi@eecs.umich.edu else 2482901Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2492901Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 2502901Ssaidi@eecs.umich.edu } else { 2512901Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2522901Ssaidi@eecs.umich.edu } 2532901Ssaidi@eecs.umich.edu } else if (state == System::Atomic) { 2542902Ssaidi@eecs.umich.edu Tick lat; 2552902Ssaidi@eecs.umich.edu lat = sendAtomic(pkt); 2562901Ssaidi@eecs.umich.edu assert(pkt->senderState); 2572901Ssaidi@eecs.umich.edu DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 2582901Ssaidi@eecs.umich.edu assert(state); 2592384SN/A 2602901Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 2612901Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 2622902Ssaidi@eecs.umich.edu state->completionEvent->schedule(curTick + lat); 2632901Ssaidi@eecs.umich.edu delete state; 2642901Ssaidi@eecs.umich.edu delete pkt->req; 2652901Ssaidi@eecs.umich.edu } 2662901Ssaidi@eecs.umich.edu pendingCount--; 2672901Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 2682901Ssaidi@eecs.umich.edu delete pkt; 2692566SN/A 2702901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 2712901Ssaidi@eecs.umich.edu drainEvent->process(); 2722901Ssaidi@eecs.umich.edu drainEvent = NULL; 2732901Ssaidi@eecs.umich.edu } 2742901Ssaidi@eecs.umich.edu 2752384SN/A } else 2762384SN/A panic("Unknown memory command state."); 2772384SN/A} 278545SN/A 279545SN/ADmaDevice::~DmaDevice() 280545SN/A{ 2812489SN/A if (dmaPort) 2822489SN/A delete dmaPort; 283545SN/A} 284545SN/A 285679SN/A 286