DMASequencer.cc revision 10231
17008Snate@binkert.org/* 27008Snate@binkert.org * Copyright (c) 2008 Mark D. Hill and David A. Wood 37008Snate@binkert.org * All rights reserved. 47008Snate@binkert.org * 57008Snate@binkert.org * Redistribution and use in source and binary forms, with or without 67008Snate@binkert.org * modification, are permitted provided that the following conditions are 77008Snate@binkert.org * met: redistributions of source code must retain the above copyright 87008Snate@binkert.org * notice, this list of conditions and the following disclaimer; 97008Snate@binkert.org * redistributions in binary form must reproduce the above copyright 107008Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 117008Snate@binkert.org * documentation and/or other materials provided with the distribution; 127008Snate@binkert.org * neither the name of the copyright holders nor the names of its 137008Snate@binkert.org * contributors may be used to endorse or promote products derived from 147008Snate@binkert.org * this software without specific prior written permission. 157008Snate@binkert.org * 167008Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 177008Snate@binkert.org * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 187008Snate@binkert.org * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 197008Snate@binkert.org * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 207008Snate@binkert.org * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 217008Snate@binkert.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 227008Snate@binkert.org * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 237008Snate@binkert.org * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 247008Snate@binkert.org * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 257008Snate@binkert.org * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 267008Snate@binkert.org * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 277008Snate@binkert.org */ 286285Snate@binkert.org 298232Snate@binkert.org#include "debug/RubyDma.hh" 309104Shestness@cs.utexas.edu#include "debug/RubyStats.hh" 317039Snate@binkert.org#include "mem/protocol/SequencerMsg.hh" 327039Snate@binkert.org#include "mem/protocol/SequencerRequestType.hh" 337039Snate@binkert.org#include "mem/ruby/system/DMASequencer.hh" 346285Snate@binkert.org#include "mem/ruby/system/System.hh" 356285Snate@binkert.org 366876Ssteve.reinhardt@amd.comDMASequencer::DMASequencer(const Params *p) 377039Snate@binkert.org : RubyPort(p) 386285Snate@binkert.org{ 396285Snate@binkert.org} 406285Snate@binkert.org 417039Snate@binkert.orgvoid 427039Snate@binkert.orgDMASequencer::init() 436285Snate@binkert.org{ 447039Snate@binkert.org RubyPort::init(); 457039Snate@binkert.org m_is_busy = false; 467039Snate@binkert.org m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); 476285Snate@binkert.org} 486285Snate@binkert.org 497039Snate@binkert.orgRequestStatus 508615Snilay@cs.wisc.eduDMASequencer::makeRequest(PacketPtr pkt) 516285Snate@binkert.org{ 527544SBrad.Beckmann@amd.com if (m_is_busy) { 537544SBrad.Beckmann@amd.com return RequestStatus_BufferFull; 547544SBrad.Beckmann@amd.com } 557544SBrad.Beckmann@amd.com 568615Snilay@cs.wisc.edu uint64_t paddr = pkt->getAddr(); 578615Snilay@cs.wisc.edu uint8_t* data = pkt->getPtr<uint8_t>(true); 588615Snilay@cs.wisc.edu int len = pkt->getSize(); 598615Snilay@cs.wisc.edu bool write = pkt->isWrite(); 606285Snate@binkert.org 617039Snate@binkert.org assert(!m_is_busy); // only support one outstanding DMA request 627039Snate@binkert.org m_is_busy = true; 636285Snate@binkert.org 647039Snate@binkert.org active_request.start_paddr = paddr; 657039Snate@binkert.org active_request.write = write; 667039Snate@binkert.org active_request.data = data; 677039Snate@binkert.org active_request.len = len; 687039Snate@binkert.org active_request.bytes_completed = 0; 697039Snate@binkert.org active_request.bytes_issued = 0; 708615Snilay@cs.wisc.edu active_request.pkt = pkt; 716285Snate@binkert.org 729508Snilay@cs.wisc.edu SequencerMsg *msg = new SequencerMsg(clockEdge()); 737453Snate@binkert.org msg->getPhysicalAddress() = Address(paddr); 747453Snate@binkert.org msg->getLineAddress() = line_address(msg->getPhysicalAddress()); 757453Snate@binkert.org msg->getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD; 767039Snate@binkert.org int offset = paddr & m_data_block_mask; 776888SBrad.Beckmann@amd.com 787453Snate@binkert.org msg->getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ? 797039Snate@binkert.org len : RubySystem::getBlockSizeBytes() - offset; 806888SBrad.Beckmann@amd.com 817915SBrad.Beckmann@amd.com if (write && (data != NULL)) { 827915SBrad.Beckmann@amd.com if (active_request.data != NULL) { 837915SBrad.Beckmann@amd.com msg->getDataBlk().setData(data, offset, msg->getLen()); 847915SBrad.Beckmann@amd.com } 857039Snate@binkert.org } 866888SBrad.Beckmann@amd.com 877039Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 887039Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 897453Snate@binkert.org active_request.bytes_issued += msg->getLen(); 906285Snate@binkert.org 917039Snate@binkert.org return RequestStatus_Issued; 926285Snate@binkert.org} 936285Snate@binkert.org 947039Snate@binkert.orgvoid 957039Snate@binkert.orgDMASequencer::issueNext() 966285Snate@binkert.org{ 9710231Ssteve.reinhardt@amd.com assert(m_is_busy); 987039Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 997039Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 1008162SBrad.Beckmann@amd.com // 1018162SBrad.Beckmann@amd.com // Must unset the busy flag before calling back the dma port because 1028162SBrad.Beckmann@amd.com // the callback may cause a previously nacked request to be reissued 1038162SBrad.Beckmann@amd.com // 1048162SBrad.Beckmann@amd.com DPRINTF(RubyDma, "DMA request completed\n"); 1058162SBrad.Beckmann@amd.com m_is_busy = false; 1067039Snate@binkert.org ruby_hit_callback(active_request.pkt); 1077039Snate@binkert.org return; 1087039Snate@binkert.org } 1096285Snate@binkert.org 1109508Snilay@cs.wisc.edu SequencerMsg *msg = new SequencerMsg(clockEdge()); 1117453Snate@binkert.org msg->getPhysicalAddress() = Address(active_request.start_paddr + 1127039Snate@binkert.org active_request.bytes_completed); 1136888SBrad.Beckmann@amd.com 1147453Snate@binkert.org assert((msg->getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 1157453Snate@binkert.org msg->getLineAddress() = line_address(msg->getPhysicalAddress()); 1166888SBrad.Beckmann@amd.com 1177453Snate@binkert.org msg->getType() = (active_request.write ? SequencerRequestType_ST : 1187039Snate@binkert.org SequencerRequestType_LD); 1196888SBrad.Beckmann@amd.com 1207453Snate@binkert.org msg->getLen() = 1217039Snate@binkert.org (active_request.len - 1227039Snate@binkert.org active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1237039Snate@binkert.org active_request.len - active_request.bytes_completed : 1247039Snate@binkert.org RubySystem::getBlockSizeBytes()); 1256888SBrad.Beckmann@amd.com 1267039Snate@binkert.org if (active_request.write) { 1277453Snate@binkert.org msg->getDataBlk(). 1287039Snate@binkert.org setData(&active_request.data[active_request.bytes_completed], 1297453Snate@binkert.org 0, msg->getLen()); 1307453Snate@binkert.org msg->getType() = SequencerRequestType_ST; 1317039Snate@binkert.org } else { 1327453Snate@binkert.org msg->getType() = SequencerRequestType_LD; 1337039Snate@binkert.org } 1346888SBrad.Beckmann@amd.com 1357039Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 1367039Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1377453Snate@binkert.org active_request.bytes_issued += msg->getLen(); 1388160SBrad.Beckmann@amd.com DPRINTF(RubyDma, 1398160SBrad.Beckmann@amd.com "DMA request bytes issued %d, bytes completed %d, total len %d\n", 1408160SBrad.Beckmann@amd.com active_request.bytes_issued, active_request.bytes_completed, 1418160SBrad.Beckmann@amd.com active_request.len); 1426285Snate@binkert.org} 1436285Snate@binkert.org 1447039Snate@binkert.orgvoid 1457039Snate@binkert.orgDMASequencer::dataCallback(const DataBlock & dblk) 1466285Snate@binkert.org{ 14710231Ssteve.reinhardt@amd.com assert(m_is_busy); 1487039Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1497039Snate@binkert.org int offset = 0; 1507039Snate@binkert.org if (active_request.bytes_completed == 0) 1517039Snate@binkert.org offset = active_request.start_paddr & m_data_block_mask; 15210231Ssteve.reinhardt@amd.com assert(!active_request.write); 1537915SBrad.Beckmann@amd.com if (active_request.data != NULL) { 1547915SBrad.Beckmann@amd.com memcpy(&active_request.data[active_request.bytes_completed], 1557915SBrad.Beckmann@amd.com dblk.getData(offset, len), len); 1567915SBrad.Beckmann@amd.com } 1577039Snate@binkert.org issueNext(); 1586285Snate@binkert.org} 1596285Snate@binkert.org 1607039Snate@binkert.orgvoid 1617039Snate@binkert.orgDMASequencer::ackCallback() 1626285Snate@binkert.org{ 1637039Snate@binkert.org issueNext(); 1646285Snate@binkert.org} 1656285Snate@binkert.org 1667039Snate@binkert.orgvoid 1679104Shestness@cs.utexas.eduDMASequencer::recordRequestType(DMASequencerRequestType requestType) { 1689104Shestness@cs.utexas.edu DPRINTF(RubyStats, "Recorded statistic: %s\n", 1699104Shestness@cs.utexas.edu DMASequencerRequestType_to_string(requestType)); 1709104Shestness@cs.utexas.edu} 1719104Shestness@cs.utexas.edu 1726876Ssteve.reinhardt@amd.comDMASequencer * 1736876Ssteve.reinhardt@amd.comDMASequencerParams::create() 1746876Ssteve.reinhardt@amd.com{ 1756876Ssteve.reinhardt@amd.com return new DMASequencer(this); 1766876Ssteve.reinhardt@amd.com} 177