io_device.cc revision 2846
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 322657Ssaidi@eecs.umich.edu#include "base/trace.hh" 33545SN/A#include "dev/io_device.hh" 34679SN/A#include "sim/builder.hh" 35545SN/A 362489SN/A 372846Ssaidi@eecs.umich.eduPioPort::PioPort(PioDevice *dev, Platform *p, std::string pname) 382846Ssaidi@eecs.umich.edu : Port(dev->name() + pname), device(dev), platform(p) 392489SN/A{ } 402489SN/A 412489SN/A 422489SN/ATick 432630SN/APioPort::recvAtomic(Packet *pkt) 442489SN/A{ 452489SN/A return device->recvAtomic(pkt); 462489SN/A} 472489SN/A 482489SN/Avoid 492630SN/APioPort::recvFunctional(Packet *pkt) 502489SN/A{ 512489SN/A device->recvAtomic(pkt); 522489SN/A} 532489SN/A 542489SN/Avoid 552521SN/APioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 562489SN/A{ 572521SN/A snoop.clear(); 582521SN/A device->addressRanges(resp); 592489SN/A} 602489SN/A 612489SN/A 622657Ssaidi@eecs.umich.eduvoid 632489SN/APioPort::recvRetry() 642489SN/A{ 652784Ssaidi@eecs.umich.edu bool result = true; 662784Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 672784Ssaidi@eecs.umich.edu result = Port::sendTiming(transmitList.front()); 682784Ssaidi@eecs.umich.edu if (result) 692784Ssaidi@eecs.umich.edu transmitList.pop_front(); 702657Ssaidi@eecs.umich.edu } 712489SN/A} 722489SN/A 732384SN/Avoid 742384SN/APioPort::SendEvent::process() 752384SN/A{ 762641Sstever@eecs.umich.edu if (port->Port::sendTiming(packet)) 772384SN/A return; 782384SN/A 792630SN/A port->transmitList.push_back(packet); 802384SN/A} 812384SN/A 822846Ssaidi@eecs.umich.eduvoid 832846Ssaidi@eecs.umich.eduPioPort::resendNacked(Packet *pkt) { 842846Ssaidi@eecs.umich.edu pkt->reinitNacked(); 852846Ssaidi@eecs.umich.edu if (transmitList.size()) { 862846Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 872846Ssaidi@eecs.umich.edu } else { 882846Ssaidi@eecs.umich.edu if (!Port::sendTiming(pkt)) 892846Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 902846Ssaidi@eecs.umich.edu } 912846Ssaidi@eecs.umich.edu}; 922384SN/A 932657Ssaidi@eecs.umich.edu 942384SN/Abool 952630SN/APioPort::recvTiming(Packet *pkt) 962384SN/A{ 972784Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 982846Ssaidi@eecs.umich.edu resendNacked(pkt); 992784Ssaidi@eecs.umich.edu } else { 1002784Ssaidi@eecs.umich.edu Tick latency = device->recvAtomic(pkt); 1012784Ssaidi@eecs.umich.edu // turn packet around to go back to requester 1022784Ssaidi@eecs.umich.edu pkt->makeTimingResponse(); 1032784Ssaidi@eecs.umich.edu sendTiming(pkt, latency); 1042784Ssaidi@eecs.umich.edu } 1052641Sstever@eecs.umich.edu return true; 1062384SN/A} 107545SN/A 108545SN/APioDevice::~PioDevice() 109545SN/A{ 1102384SN/A if (pioPort) 1112489SN/A delete pioPort; 112545SN/A} 113545SN/A 1142542SN/Avoid 1152541SN/APioDevice::init() 1162541SN/A{ 1172541SN/A if (!pioPort) 1182541SN/A panic("Pio port not connected to anything!"); 1192541SN/A pioPort->sendStatusChange(Port::RangeChange); 1202541SN/A} 1212541SN/A 1222539SN/Avoid 1232539SN/ABasicPioDevice::addressRanges(AddrRangeList &range_list) 1242539SN/A{ 1252539SN/A assert(pioSize != 0); 1262539SN/A range_list.clear(); 1272539SN/A range_list.push_back(RangeSize(pioAddr, pioSize)); 1282539SN/A} 1292539SN/A 1302489SN/A 1312565SN/ADmaPort::DmaPort(DmaDevice *dev, Platform *p) 1322640Sstever@eecs.umich.edu : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0) 1332489SN/A{ } 1342489SN/A 1352489SN/Abool 1362630SN/ADmaPort::recvTiming(Packet *pkt) 1372384SN/A{ 1382685Ssaidi@eecs.umich.edu 1392685Ssaidi@eecs.umich.edu 1402685Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 1412685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n", 1422685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1432685Ssaidi@eecs.umich.edu pkt->reinitNacked(); 1442685Ssaidi@eecs.umich.edu sendDma(pkt, true); 1452685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1462565SN/A DmaReqState *state; 1472685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n", 1482685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1492641Sstever@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1502685Ssaidi@eecs.umich.edu pendingCount--; 1512685Ssaidi@eecs.umich.edu 1522685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1532657Ssaidi@eecs.umich.edu assert(state); 1542685Ssaidi@eecs.umich.edu 1552685Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 1562685Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 1572685Ssaidi@eecs.umich.edu state->completionEvent->process(); 1582685Ssaidi@eecs.umich.edu delete state; 1592685Ssaidi@eecs.umich.edu } 1602630SN/A delete pkt->req; 1612630SN/A delete pkt; 1622569SN/A } else { 1632685Ssaidi@eecs.umich.edu panic("Got packet without sender state... huh?\n"); 1642565SN/A } 1652569SN/A 1662657Ssaidi@eecs.umich.edu return true; 1672384SN/A} 168679SN/A 1692521SN/ADmaDevice::DmaDevice(Params *p) 1702565SN/A : PioDevice(p), dmaPort(NULL) 1712565SN/A{ } 1722384SN/A 1732384SN/Avoid 1742489SN/ADmaPort::recvRetry() 1752489SN/A{ 1762489SN/A Packet* pkt = transmitList.front(); 1772659Ssaidi@eecs.umich.edu bool result = true; 1782659Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 1792659Ssaidi@eecs.umich.edu DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n", 1802659Ssaidi@eecs.umich.edu pkt, pkt->senderState); 1812659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 1822659Ssaidi@eecs.umich.edu if (result) { 1832659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 1842659Ssaidi@eecs.umich.edu transmitList.pop_front(); 1852659Ssaidi@eecs.umich.edu } else { 1862659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 1872659Ssaidi@eecs.umich.edu } 1882657Ssaidi@eecs.umich.edu } 1892489SN/A} 1902641Sstever@eecs.umich.edu 1912641Sstever@eecs.umich.edu 1922489SN/Avoid 1932641Sstever@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 1942641Sstever@eecs.umich.edu uint8_t *data) 1952384SN/A{ 1962384SN/A assert(event); 1972384SN/A 1982685Ssaidi@eecs.umich.edu DmaReqState *reqState = new DmaReqState(event, this, size); 1992384SN/A 2002406SN/A for (ChunkGenerator gen(addr, size, peerBlockSize()); 2012406SN/A !gen.done(); gen.next()) { 2022663Sstever@eecs.umich.edu Request *req = new Request(gen.addr(), gen.size(), 0); 2032641Sstever@eecs.umich.edu Packet *pkt = new Packet(req, cmd, Packet::Broadcast); 2042641Sstever@eecs.umich.edu 2052384SN/A // Increment the data pointer on a write 2062566SN/A if (data) 2072685Ssaidi@eecs.umich.edu pkt->dataStatic(data + gen.complete()); 2082641Sstever@eecs.umich.edu 2092685Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2102641Sstever@eecs.umich.edu 2112565SN/A assert(pendingCount >= 0); 2122565SN/A pendingCount++; 2132566SN/A sendDma(pkt); 2142384SN/A } 2152384SN/A} 2162384SN/A 2172384SN/A 2182384SN/Avoid 2192685Ssaidi@eecs.umich.eduDmaPort::sendDma(Packet *pkt, bool front) 2202384SN/A{ 2212384SN/A // some kind of selction between access methods 2222384SN/A // more work is going to have to be done to make 2232384SN/A // switching actually work 2242489SN/A /* MemState state = device->platform->system->memState; 2252384SN/A 2262657Ssaidi@eecs.umich.edu if (state == Timing) { */ 2272685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n", 2282685Ssaidi@eecs.umich.edu pkt, pkt->getAddr()); 2292659Ssaidi@eecs.umich.edu if (transmitList.size() || !sendTiming(pkt)) { 2302685Ssaidi@eecs.umich.edu if (front) 2312685Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2322685Ssaidi@eecs.umich.edu else 2332685Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2342657Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 2352657Ssaidi@eecs.umich.edu } else { 2362657Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2372657Ssaidi@eecs.umich.edu } 2382657Ssaidi@eecs.umich.edu /* } else if (state == Atomic) { 2392630SN/A sendAtomic(pkt); 2402566SN/A if (pkt->senderState) { 2412641Sstever@eecs.umich.edu DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 2422657Ssaidi@eecs.umich.edu assert(state); 2432685Ssaidi@eecs.umich.edu state->completionEvent->schedule(curTick + (pkt->time - 2442685Ssaidi@eecs.umich.edu pkt->req->getTime()) +1); 2452685Ssaidi@eecs.umich.edu delete state; 2462565SN/A } 2472566SN/A pendingCount--; 2482566SN/A assert(pendingCount >= 0); 2492566SN/A delete pkt->req; 2502566SN/A delete pkt; 2512566SN/A 2522657Ssaidi@eecs.umich.edu } else if (state == Functional) { 2532384SN/A sendFunctional(pkt); 2542384SN/A // Is this correct??? 2552630SN/A completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime); 2562384SN/A completionEvent == NULL; 2572384SN/A } else 2582384SN/A panic("Unknown memory command state."); 2592489SN/A */ 2602384SN/A} 261545SN/A 262545SN/ADmaDevice::~DmaDevice() 263545SN/A{ 2642489SN/A if (dmaPort) 2652489SN/A delete dmaPort; 266545SN/A} 267545SN/A 268679SN/A 269