DMASequencer.cc revision 8165
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 297039Snate@binkert.org#include "mem/protocol/SequencerMsg.hh" 307039Snate@binkert.org#include "mem/protocol/SequencerRequestType.hh" 316285Snate@binkert.org#include "mem/ruby/buffers/MessageBuffer.hh" 326285Snate@binkert.org#include "mem/ruby/slicc_interface/AbstractController.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 507039Snate@binkert.orgDMASequencer::makeRequest(const RubyRequest &request) 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 567039Snate@binkert.org uint64_t paddr = request.paddr; 577039Snate@binkert.org uint8_t* data = request.data; 587039Snate@binkert.org int len = request.len; 597039Snate@binkert.org bool write = false; 607039Snate@binkert.org switch(request.type) { 617039Snate@binkert.org case RubyRequestType_LD: 627039Snate@binkert.org write = false; 637039Snate@binkert.org break; 647039Snate@binkert.org case RubyRequestType_ST: 657039Snate@binkert.org write = true; 667039Snate@binkert.org break; 678165Snilay@cs.wisc.edu default: 687039Snate@binkert.org panic("DMASequencer::makeRequest does not support RubyRequestType"); 697039Snate@binkert.org return RequestStatus_NULL; 707039Snate@binkert.org } 716285Snate@binkert.org 727039Snate@binkert.org assert(!m_is_busy); // only support one outstanding DMA request 737039Snate@binkert.org m_is_busy = true; 746285Snate@binkert.org 757039Snate@binkert.org active_request.start_paddr = paddr; 767039Snate@binkert.org active_request.write = write; 777039Snate@binkert.org active_request.data = data; 787039Snate@binkert.org active_request.len = len; 797039Snate@binkert.org active_request.bytes_completed = 0; 807039Snate@binkert.org active_request.bytes_issued = 0; 817039Snate@binkert.org active_request.pkt = request.pkt; 826285Snate@binkert.org 837453Snate@binkert.org SequencerMsg *msg = new SequencerMsg; 847453Snate@binkert.org msg->getPhysicalAddress() = Address(paddr); 857453Snate@binkert.org msg->getLineAddress() = line_address(msg->getPhysicalAddress()); 867453Snate@binkert.org msg->getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD; 877039Snate@binkert.org int offset = paddr & m_data_block_mask; 886888SBrad.Beckmann@amd.com 897453Snate@binkert.org msg->getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ? 907039Snate@binkert.org len : RubySystem::getBlockSizeBytes() - offset; 916888SBrad.Beckmann@amd.com 927915SBrad.Beckmann@amd.com if (write && (data != NULL)) { 937915SBrad.Beckmann@amd.com if (active_request.data != NULL) { 947915SBrad.Beckmann@amd.com msg->getDataBlk().setData(data, offset, msg->getLen()); 957915SBrad.Beckmann@amd.com } 967039Snate@binkert.org } 976888SBrad.Beckmann@amd.com 987039Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 997039Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1007453Snate@binkert.org active_request.bytes_issued += msg->getLen(); 1016285Snate@binkert.org 1027039Snate@binkert.org return RequestStatus_Issued; 1036285Snate@binkert.org} 1046285Snate@binkert.org 1057039Snate@binkert.orgvoid 1067039Snate@binkert.orgDMASequencer::issueNext() 1076285Snate@binkert.org{ 1087039Snate@binkert.org assert(m_is_busy == true); 1097039Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 1107039Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 1118162SBrad.Beckmann@amd.com // 1128162SBrad.Beckmann@amd.com // Must unset the busy flag before calling back the dma port because 1138162SBrad.Beckmann@amd.com // the callback may cause a previously nacked request to be reissued 1148162SBrad.Beckmann@amd.com // 1158162SBrad.Beckmann@amd.com DPRINTF(RubyDma, "DMA request completed\n"); 1168162SBrad.Beckmann@amd.com m_is_busy = false; 1177039Snate@binkert.org ruby_hit_callback(active_request.pkt); 1187039Snate@binkert.org return; 1197039Snate@binkert.org } 1206285Snate@binkert.org 1217453Snate@binkert.org SequencerMsg *msg = new SequencerMsg; 1227453Snate@binkert.org msg->getPhysicalAddress() = Address(active_request.start_paddr + 1237039Snate@binkert.org active_request.bytes_completed); 1246888SBrad.Beckmann@amd.com 1257453Snate@binkert.org assert((msg->getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 1267453Snate@binkert.org msg->getLineAddress() = line_address(msg->getPhysicalAddress()); 1276888SBrad.Beckmann@amd.com 1287453Snate@binkert.org msg->getType() = (active_request.write ? SequencerRequestType_ST : 1297039Snate@binkert.org SequencerRequestType_LD); 1306888SBrad.Beckmann@amd.com 1317453Snate@binkert.org msg->getLen() = 1327039Snate@binkert.org (active_request.len - 1337039Snate@binkert.org active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1347039Snate@binkert.org active_request.len - active_request.bytes_completed : 1357039Snate@binkert.org RubySystem::getBlockSizeBytes()); 1366888SBrad.Beckmann@amd.com 1377039Snate@binkert.org if (active_request.write) { 1387453Snate@binkert.org msg->getDataBlk(). 1397039Snate@binkert.org setData(&active_request.data[active_request.bytes_completed], 1407453Snate@binkert.org 0, msg->getLen()); 1417453Snate@binkert.org msg->getType() = SequencerRequestType_ST; 1427039Snate@binkert.org } else { 1437453Snate@binkert.org msg->getType() = SequencerRequestType_LD; 1447039Snate@binkert.org } 1456888SBrad.Beckmann@amd.com 1467039Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 1477039Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1487453Snate@binkert.org active_request.bytes_issued += msg->getLen(); 1498160SBrad.Beckmann@amd.com DPRINTF(RubyDma, 1508160SBrad.Beckmann@amd.com "DMA request bytes issued %d, bytes completed %d, total len %d\n", 1518160SBrad.Beckmann@amd.com active_request.bytes_issued, active_request.bytes_completed, 1528160SBrad.Beckmann@amd.com active_request.len); 1536285Snate@binkert.org} 1546285Snate@binkert.org 1557039Snate@binkert.orgvoid 1567039Snate@binkert.orgDMASequencer::dataCallback(const DataBlock & dblk) 1576285Snate@binkert.org{ 1587039Snate@binkert.org assert(m_is_busy == true); 1597039Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1607039Snate@binkert.org int offset = 0; 1617039Snate@binkert.org if (active_request.bytes_completed == 0) 1627039Snate@binkert.org offset = active_request.start_paddr & m_data_block_mask; 1637039Snate@binkert.org assert(active_request.write == false); 1647915SBrad.Beckmann@amd.com if (active_request.data != NULL) { 1657915SBrad.Beckmann@amd.com memcpy(&active_request.data[active_request.bytes_completed], 1667915SBrad.Beckmann@amd.com dblk.getData(offset, len), len); 1677915SBrad.Beckmann@amd.com } 1687039Snate@binkert.org issueNext(); 1696285Snate@binkert.org} 1706285Snate@binkert.org 1717039Snate@binkert.orgvoid 1727039Snate@binkert.orgDMASequencer::ackCallback() 1736285Snate@binkert.org{ 1747039Snate@binkert.org issueNext(); 1756285Snate@binkert.org} 1766285Snate@binkert.org 1777039Snate@binkert.orgvoid 1787055Snate@binkert.orgDMASequencer::printConfig(std::ostream & out) 1796285Snate@binkert.org{ 1806285Snate@binkert.org} 1816876Ssteve.reinhardt@amd.com 1826876Ssteve.reinhardt@amd.comDMASequencer * 1836876Ssteve.reinhardt@amd.comDMASequencerParams::create() 1846876Ssteve.reinhardt@amd.com{ 1856876Ssteve.reinhardt@amd.com return new DMASequencer(this); 1866876Ssteve.reinhardt@amd.com} 187