io_device.cc revision 2914
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/trace.hh" 332657Ssaidi@eecs.umich.edu#include "dev/io_device.hh" 34545SN/A#include "sim/builder.hh" 35679SN/A#include "sim/system.hh" 362901Ssaidi@eecs.umich.edu 37545SN/A 382489SN/APioPort::PioPort(PioDevice *dev, System *s, std::string pname) 392901Ssaidi@eecs.umich.edu : SimpleTimingPort(dev->name() + pname), device(dev), sys(s) 403401Sktlim@umich.edu{ } 412489SN/A 422489SN/A 432489SN/ATick 442489SN/APioPort::recvAtomic(Packet *pkt) 453349Sbinkertn@umich.edu{ 462489SN/A return device->recvAtomic(pkt); 473091Sstever@eecs.umich.edu} 482489SN/A 492489SN/Avoid 502489SN/APioPort::recvFunctional(Packet *pkt) 514475Sstever@eecs.umich.edu{ 522489SN/A device->recvAtomic(pkt); 534475Sstever@eecs.umich.edu} 542521SN/A 552489SN/Avoid 562489SN/APioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 572489SN/A{ 58545SN/A snoop.clear(); 59545SN/A device->addressRanges(resp); 602384SN/A} 612489SN/A 62545SN/A 63545SN/Abool 642542SN/APioPort::recvTiming(Packet *pkt) 652541SN/A{ 662541SN/A if (pkt->result == Packet::Nacked) { 672541SN/A resendNacked(pkt); 682541SN/A } else { 692541SN/A Tick latency = device->recvAtomic(pkt); 702541SN/A // turn packet around to go back to requester 712541SN/A pkt->makeTimingResponse(); 722901Ssaidi@eecs.umich.edu sendTiming(pkt, latency); 732901Ssaidi@eecs.umich.edu } 742901Ssaidi@eecs.umich.edu return true; 752901Ssaidi@eecs.umich.edu} 762901Ssaidi@eecs.umich.edu 772901Ssaidi@eecs.umich.eduPioDevice::~PioDevice() 782901Ssaidi@eecs.umich.edu{ 792901Ssaidi@eecs.umich.edu if (pioPort) 802901Ssaidi@eecs.umich.edu delete pioPort; 812901Ssaidi@eecs.umich.edu} 822901Ssaidi@eecs.umich.edu 832901Ssaidi@eecs.umich.eduvoid 842901Ssaidi@eecs.umich.eduPioDevice::init() 852539SN/A{ 862539SN/A if (!pioPort) 872539SN/A panic("Pio port not connected to anything!"); 882539SN/A pioPort->sendStatusChange(Port::RangeChange); 892539SN/A} 902539SN/A 912539SN/A 922539SN/Aunsigned int 932489SN/APioDevice::drain(Event *de) 942901Ssaidi@eecs.umich.edu{ 953401Sktlim@umich.edu unsigned int count; 964435Ssaidi@eecs.umich.edu count = pioPort->drain(de); 974435Ssaidi@eecs.umich.edu if (count) 982489SN/A changeState(Draining); 992489SN/A else 1002489SN/A changeState(Drained); 1013349Sbinkertn@umich.edu return count; 1022384SN/A} 1032685Ssaidi@eecs.umich.edu 1042685Ssaidi@eecs.umich.eduvoid 1052685Ssaidi@eecs.umich.eduBasicPioDevice::addressRanges(AddrRangeList &range_list) 1062685Ssaidi@eecs.umich.edu{ 1072685Ssaidi@eecs.umich.edu assert(pioSize != 0); 1084435Ssaidi@eecs.umich.edu range_list.clear(); 1094435Ssaidi@eecs.umich.edu range_list.push_back(RangeSize(pioAddr, pioSize)); 1104435Ssaidi@eecs.umich.edu} 1114435Ssaidi@eecs.umich.edu 1124435Ssaidi@eecs.umich.edu 1134435Ssaidi@eecs.umich.eduDmaPort::DmaPort(DmaDevice *dev, System *s) 1144437Ssaidi@eecs.umich.edu : Port(dev->name() + "-dmaport"), device(dev), sys(s), pendingCount(0), 1154435Ssaidi@eecs.umich.edu actionInProgress(0), drainEvent(NULL) 1164435Ssaidi@eecs.umich.edu{ } 1174435Ssaidi@eecs.umich.edu 1182685Ssaidi@eecs.umich.edubool 1194435Ssaidi@eecs.umich.eduDmaPort::recvTiming(Packet *pkt) 1202685Ssaidi@eecs.umich.edu{ 1212565SN/A 1224435Ssaidi@eecs.umich.edu 1234435Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 1244435Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n", 1254435Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1262641Sstever@eecs.umich.edu pkt->reinitNacked(); 1272685Ssaidi@eecs.umich.edu sendDma(pkt, true); 1282685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1292685Ssaidi@eecs.umich.edu DmaReqState *state; 1302657Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n", 1312685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1322685Ssaidi@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1334435Ssaidi@eecs.umich.edu pendingCount--; 1342685Ssaidi@eecs.umich.edu 1352685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1362685Ssaidi@eecs.umich.edu assert(state); 1372685Ssaidi@eecs.umich.edu 1382630SN/A state->numBytes += pkt->req->getSize(); 1392630SN/A if (state->totBytes == state->numBytes) { 1402901Ssaidi@eecs.umich.edu state->completionEvent->process(); 1412901Ssaidi@eecs.umich.edu delete state; 1422901Ssaidi@eecs.umich.edu } 1432901Ssaidi@eecs.umich.edu delete pkt->req; 1442901Ssaidi@eecs.umich.edu delete pkt; 1452569SN/A 1462685Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 1472565SN/A drainEvent->process(); 1482569SN/A drainEvent = NULL; 1492657Ssaidi@eecs.umich.edu } 1502384SN/A } else { 151679SN/A panic("Got packet without sender state... huh?\n"); 1522521SN/A } 1534435Ssaidi@eecs.umich.edu 1544435Ssaidi@eecs.umich.edu return true; 1552565SN/A} 1562384SN/A 1572901Ssaidi@eecs.umich.eduDmaDevice::DmaDevice(Params *p) 1582901Ssaidi@eecs.umich.edu : PioDevice(p), dmaPort(NULL) 1592901Ssaidi@eecs.umich.edu{ } 1602901Ssaidi@eecs.umich.edu 1612901Ssaidi@eecs.umich.edu 1622901Ssaidi@eecs.umich.eduunsigned int 1632901Ssaidi@eecs.umich.eduDmaDevice::drain(Event *de) 1642901Ssaidi@eecs.umich.edu{ 1652901Ssaidi@eecs.umich.edu unsigned int count; 1662901Ssaidi@eecs.umich.edu count = pioPort->drain(de) + dmaPort->drain(de); 1672901Ssaidi@eecs.umich.edu if (count) 1682901Ssaidi@eecs.umich.edu changeState(Draining); 1692901Ssaidi@eecs.umich.edu else 1702901Ssaidi@eecs.umich.edu changeState(Drained); 1712901Ssaidi@eecs.umich.edu return count; 1722901Ssaidi@eecs.umich.edu} 1732901Ssaidi@eecs.umich.edu 1742901Ssaidi@eecs.umich.eduunsigned int 1752901Ssaidi@eecs.umich.eduDmaPort::drain(Event *de) 1762901Ssaidi@eecs.umich.edu{ 1772901Ssaidi@eecs.umich.edu if (pendingCount == 0) 1782901Ssaidi@eecs.umich.edu return 0; 1792901Ssaidi@eecs.umich.edu drainEvent = de; 1802384SN/A return 1; 1812489SN/A} 1822489SN/A 1834435Ssaidi@eecs.umich.edu 1843349Sbinkertn@umich.eduvoid 1852659Ssaidi@eecs.umich.eduDmaPort::recvRetry() 1864435Ssaidi@eecs.umich.edu{ 1872659Ssaidi@eecs.umich.edu Packet* pkt = transmitList.front(); 1882659Ssaidi@eecs.umich.edu bool result = true; 1892659Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 1902659Ssaidi@eecs.umich.edu DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n", 1912659Ssaidi@eecs.umich.edu pkt, pkt->senderState); 1922659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 1934435Ssaidi@eecs.umich.edu if (result) { 1942659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 1954435Ssaidi@eecs.umich.edu transmitList.pop_front(); 1962659Ssaidi@eecs.umich.edu } else { 1972659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 1984435Ssaidi@eecs.umich.edu } 1994435Ssaidi@eecs.umich.edu } 2004435Ssaidi@eecs.umich.edu} 2014435Ssaidi@eecs.umich.edu 2024435Ssaidi@eecs.umich.edu 2034435Ssaidi@eecs.umich.eduvoid 2042657Ssaidi@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 2054435Ssaidi@eecs.umich.edu uint8_t *data) 2064435Ssaidi@eecs.umich.edu{ 2074435Ssaidi@eecs.umich.edu assert(event); 2082489SN/A 2092641Sstever@eecs.umich.edu assert(device->getState() == SimObject::Running); 2102641Sstever@eecs.umich.edu 2112489SN/A DmaReqState *reqState = new DmaReqState(event, this, size); 2122641Sstever@eecs.umich.edu 2132641Sstever@eecs.umich.edu for (ChunkGenerator gen(addr, size, peerBlockSize()); 2142384SN/A !gen.done(); gen.next()) { 2152384SN/A Request *req = new Request(gen.addr(), gen.size(), 0); 2162384SN/A Packet *pkt = new Packet(req, cmd, Packet::Broadcast); 2172901Ssaidi@eecs.umich.edu 2182901Ssaidi@eecs.umich.edu // Increment the data pointer on a write 2192685Ssaidi@eecs.umich.edu if (data) 2202384SN/A pkt->dataStatic(data + gen.complete()); 2214451Ssaidi@eecs.umich.edu 2224451Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2234451Ssaidi@eecs.umich.edu 2242406SN/A assert(pendingCount >= 0); 2252406SN/A pendingCount++; 2262663Sstever@eecs.umich.edu sendDma(pkt); 2273349Sbinkertn@umich.edu } 2282641Sstever@eecs.umich.edu 2292384SN/A} 2302566SN/A 2312685Ssaidi@eecs.umich.edu 2322641Sstever@eecs.umich.eduvoid 2332685Ssaidi@eecs.umich.eduDmaPort::sendDma(Packet *pkt, bool front) 2342641Sstever@eecs.umich.edu{ 2352565SN/A // some kind of selction between access methods 2362565SN/A // more work is going to have to be done to make 2374451Ssaidi@eecs.umich.edu // switching actually work 2384451Ssaidi@eecs.umich.edu 2394435Ssaidi@eecs.umich.edu System::MemoryMode state = sys->getMemoryMode(); 2402384SN/A if (state == System::Timing) { 2412901Ssaidi@eecs.umich.edu DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n", 2422384SN/A pkt, pkt->getAddr()); 2432384SN/A if (transmitList.size() || !sendTiming(pkt)) { 2444435Ssaidi@eecs.umich.edu if (front) 2454435Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2464435Ssaidi@eecs.umich.edu else 2474435Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2484435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 2494435Ssaidi@eecs.umich.edu } else { 2504435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2514435Ssaidi@eecs.umich.edu } 2524435Ssaidi@eecs.umich.edu } else if (state == System::Atomic) { 2534435Ssaidi@eecs.umich.edu Tick lat; 2544435Ssaidi@eecs.umich.edu lat = sendAtomic(pkt); 2552384SN/A assert(pkt->senderState); 2562384SN/A DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 2574435Ssaidi@eecs.umich.edu assert(state); 2582384SN/A 2592901Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 2602901Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 2612901Ssaidi@eecs.umich.edu state->completionEvent->schedule(curTick + lat); 2624435Ssaidi@eecs.umich.edu delete state; 2634435Ssaidi@eecs.umich.edu delete pkt->req; 2642902Ssaidi@eecs.umich.edu } 2652901Ssaidi@eecs.umich.edu pendingCount--; 2662901Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 2674435Ssaidi@eecs.umich.edu delete pkt; 2684435Ssaidi@eecs.umich.edu 2694435Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 2704435Ssaidi@eecs.umich.edu drainEvent->process(); 2714435Ssaidi@eecs.umich.edu drainEvent = NULL; 2722901Ssaidi@eecs.umich.edu } 2732901Ssaidi@eecs.umich.edu 2744435Ssaidi@eecs.umich.edu } else 2754435Ssaidi@eecs.umich.edu panic("Unknown memory command state."); 2764435Ssaidi@eecs.umich.edu} 2774435Ssaidi@eecs.umich.edu 2784435Ssaidi@eecs.umich.eduDmaDevice::~DmaDevice() 2794435Ssaidi@eecs.umich.edu{ 2804435Ssaidi@eecs.umich.edu if (dmaPort) 2814435Ssaidi@eecs.umich.edu delete dmaPort; 2824435Ssaidi@eecs.umich.edu} 2834435Ssaidi@eecs.umich.edu 2844435Ssaidi@eecs.umich.edu 2854435Ssaidi@eecs.umich.edu