From af26532bbd1a97a1f423c2944361290f1b696193 Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Sun, 13 May 2007 01:44:42 -0400 Subject: fix handling of atomic packets fix up code for counting requests and responses --HG-- extra : convert_revision : 0d70981ee41c5d9c36cad01bd505281a096f6119 --- src/mem/bridge.cc | 60 +++++++++++++++++++++++++++++++++++++++++++++++-------- src/mem/bridge.hh | 5 ++--- 2 files changed, 54 insertions(+), 11 deletions(-) diff --git a/src/mem/bridge.cc b/src/mem/bridge.cc index e89473be3..f525ccb48 100644 --- a/src/mem/bridge.cc +++ b/src/mem/bridge.cc @@ -119,7 +119,14 @@ Bridge::BridgePort::recvTiming(PacketPtr pkt) DPRINTF(BusBridge, "recvTiming: src %d dest %d addr 0x%x\n", pkt->getSrc(), pkt->getDest(), pkt->getAddr()); - if (pkt->isRequest() && otherPort->reqQueueFull()) { + DPRINTF(BusBridge, "Local queue size: %d outreq: %d outresp: %d\n", + sendQueue.size(), queuedRequests, outstandingResponses); + DPRINTF(BusBridge, "Remove queue size: %d outreq: %d outresp: %d\n", + otherPort->sendQueue.size(), otherPort->queuedRequests, + otherPort->outstandingResponses); + + if (pkt->isRequest() && otherPort->reqQueueFull() && pkt->result != + Packet::Nacked) { DPRINTF(BusBridge, "Remote queue full, nacking\n"); nackRequest(pkt); return true; @@ -191,7 +198,7 @@ Bridge::BridgePort::nackRequest(PacketPtr pkt) void Bridge::BridgePort::queueForSendTiming(PacketPtr pkt) { - if (pkt->isResponse() || pkt->result == Packet::Nacked) { + if (pkt->isResponse() || pkt->result == Packet::Nacked) { // This is a response for a request we forwarded earlier. The // corresponding PacketBuffer should be stored in the packet's // senderState field. @@ -201,9 +208,9 @@ Bridge::BridgePort::queueForSendTiming(PacketPtr pkt) // from original request buf->fixResponse(pkt); - // Check if this packet was expecting a response (this is either it or - // its a nacked packet and we won't be seeing that response) - if (buf->expectResponse) + // Check if this packet was expecting a response and it's a nacked + // packet, in which case we will never being seeing it + if (buf->expectResponse && pkt->result == Packet::Nacked) --outstandingResponses; @@ -213,6 +220,13 @@ Bridge::BridgePort::queueForSendTiming(PacketPtr pkt) delete buf; } + + if (pkt->isRequest() && pkt->result != Packet::Nacked) { + ++queuedRequests; + } + + + Tick readyTime = curTick + delay; PacketBuffer *buf = new PacketBuffer(pkt, readyTime); DPRINTF(BusBridge, "old sender state: %#X, new sender state: %#X\n", @@ -225,7 +239,6 @@ Bridge::BridgePort::queueForSendTiming(PacketPtr pkt) if (sendQueue.empty()) { sendEvent.schedule(readyTime); } - ++queuedRequests; sendQueue.push_back(buf); } @@ -254,6 +267,8 @@ Bridge::BridgePort::trySend() DPRINTF(BusBridge, "trySend: origSrc %d dest %d addr 0x%x\n", buf->origSrc, pkt->getDest(), pkt->getAddr()); + bool wasReq = pkt->isRequest(); + bool wasNacked = pkt->result == Packet::Nacked; if (sendTiming(pkt)) { // send successful @@ -270,8 +285,12 @@ Bridge::BridgePort::trySend() delete buf; } - if (!buf->nacked) + if (!wasNacked) { + if (wasReq) --queuedRequests; + else + --outstandingResponses; + } // If there are more packets to send, schedule event to try again. if (!sendQueue.empty()) { @@ -305,7 +324,32 @@ Bridge::BridgePort::recvRetry() Tick Bridge::BridgePort::recvAtomic(PacketPtr pkt) { - return otherPort->sendAtomic(pkt) + delay; + int pbs = otherPort->peerBlockSize(); + Tick atomic_delay; + // fix partial atomic writes... similar to the timing code that does the + // same + if (pkt->cmd == MemCmd::WriteInvalidateReq && fixPartialWrite && + pkt->getOffset(pbs) && pkt->getSize() != pbs) { + PacketDataPtr data; + data = new uint8_t[pbs]; + PacketPtr funcPkt = new Packet(pkt->req, MemCmd::ReadReq, + Packet::Broadcast, pbs); + + funcPkt->dataStatic(data); + otherPort->sendFunctional(funcPkt); + assert(funcPkt->result == Packet::Success); + delete funcPkt; + memcpy(data + pkt->getOffset(pbs), pkt->getPtr(), + pkt->getSize()); + PacketPtr newPkt = new Packet(pkt->req, MemCmd::WriteInvalidateReq, + Packet::Broadcast, pbs); + pkt->dataDynamicArray(data); + atomic_delay = otherPort->sendAtomic(newPkt); + delete newPkt; + } else { + atomic_delay = otherPort->sendAtomic(pkt); + } + return atomic_delay + delay; } /** Function called by the port when the bus is receiving a Functional diff --git a/src/mem/bridge.hh b/src/mem/bridge.hh index cb5a6baed..7df3c767f 100644 --- a/src/mem/bridge.hh +++ b/src/mem/bridge.hh @@ -82,16 +82,15 @@ class Bridge : public MemObject bool partialWriteFixed; PacketPtr oldPkt; - bool nacked; PacketBuffer(PacketPtr _pkt, Tick t, bool nack = false) : ready(t), pkt(_pkt), origSenderState(_pkt->senderState), origSrc(_pkt->getSrc()), expectResponse(_pkt->needsResponse() && !nack), - partialWriteFixed(false), nacked(nack) + partialWriteFixed(false) { - if (!pkt->isResponse() && !nack) + if (!pkt->isResponse() && !nack && pkt->result != Packet::Nacked) pkt->senderState = this; } -- cgit v1.2.3 From ea4e6f2e3d4d0ce6473fd2be5d9307c1e6545f72 Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Mon, 14 May 2007 16:14:59 -0400 Subject: add uglyiness to fix dmas src/dev/io_device.cc: extra printing and assertions src/mem/bridge.hh: deal with packets only satisfying part of a request by making many requests src/mem/cache/cache_impl.hh: make the cache try to satisfy a functional request from the cache above it before checking itself --HG-- extra : convert_revision : 1df52ab61d7967e14cc377c560495430a6af266a --- src/dev/io_device.cc | 16 +++++++++++++++- src/mem/bridge.hh | 20 +++++++++++++------- src/mem/cache/cache_impl.hh | 6 +++--- 3 files changed, 31 insertions(+), 11 deletions(-) diff --git a/src/dev/io_device.cc b/src/dev/io_device.cc index d430ace72..6528bd81c 100644 --- a/src/dev/io_device.cc +++ b/src/dev/io_device.cc @@ -218,6 +218,9 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, DmaReqState *reqState = new DmaReqState(event, this, size); + + DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, + event->scheduled()); for (ChunkGenerator gen(addr, size, peerBlockSize()); !gen.done(); gen.next()) { Request *req = new Request(gen.addr(), gen.size(), 0); @@ -231,6 +234,8 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, assert(pendingCount >= 0); pendingCount++; + DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), + gen.size()); queueDma(pkt); } @@ -281,19 +286,28 @@ DmaPort::sendDma() if (transmitList.size() && backoffTime && !inRetry && !backoffEvent.scheduled()) { + DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", + backoffTime+curTick); backoffEvent.schedule(backoffTime+curTick); } } else if (state == System::Atomic) { transmitList.pop_front(); Tick lat; + DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", + pkt->req->getPaddr(), pkt->req->getSize()); lat = sendAtomic(pkt); assert(pkt->senderState); DmaReqState *state = dynamic_cast(pkt->senderState); assert(state); - state->numBytes += pkt->req->getSize(); + + DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", + pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, + state->totBytes, state->completionEvent->scheduled()); + if (state->totBytes == state->numBytes) { + assert(!state->completionEvent->scheduled()); state->completionEvent->schedule(curTick + lat); delete state; delete pkt->req; diff --git a/src/mem/bridge.hh b/src/mem/bridge.hh index 7df3c767f..5951eeb98 100644 --- a/src/mem/bridge.hh +++ b/src/mem/bridge.hh @@ -108,18 +108,24 @@ class Bridge : public MemObject assert(!partialWriteFixed); assert(expectResponse); - int pbs = port->peerBlockSize(); + Addr pbs = port->peerBlockSize(); + Addr blockAddr = pkt->getAddr() & ~(pbs-1); partialWriteFixed = true; PacketDataPtr data; data = new uint8_t[pbs]; - PacketPtr funcPkt = new Packet(pkt->req, MemCmd::ReadReq, - Packet::Broadcast, pbs); - - funcPkt->dataStatic(data); - port->sendFunctional(funcPkt); - assert(funcPkt->result == Packet::Success); + RequestPtr funcReq = new Request(blockAddr, 4, 0); + PacketPtr funcPkt = new Packet(funcReq, MemCmd::ReadReq, + Packet::Broadcast); + for (int x = 0; x < pbs; x+=4) { + funcReq->setPhys(blockAddr + x, 4, 0); + funcPkt->reinitFromRequest(); + funcPkt->dataStatic(data + x); + port->sendFunctional(funcPkt); + assert(funcPkt->result == Packet::Success); + } delete funcPkt; + delete funcReq; oldPkt = pkt; memcpy(data + oldPkt->getOffset(pbs), pkt->getPtr(), diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index c70f10151..db488d33d 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -1290,9 +1290,9 @@ template void Cache::MemSidePort::recvFunctional(PacketPtr pkt) { - if (checkFunctional(pkt)) { - myCache()->probe(pkt, false, cache->cpuSidePort); - } + myCache()->probe(pkt, false, cache->cpuSidePort); + if (pkt->result != Packet::Success) + checkFunctional(pkt); } -- cgit v1.2.3 From 57104ea5f9e94dc4fe664f91e60278e486111ae9 Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Mon, 14 May 2007 16:37:00 -0400 Subject: couple more bug fixes for intel nic src/dev/i8254xGBe.cc: src/dev/i8254xGBe.hh: couple more bug fixes --HG-- extra : convert_revision : ae5b806528c1ec06f0091e1f6e50fc0721057ddb --- configs/boot/devtime.rcS | 5 +---- src/dev/i8254xGBe.cc | 29 +++++++++++++++++++++++++++-- src/dev/i8254xGBe.hh | 2 ++ 3 files changed, 30 insertions(+), 6 deletions(-) diff --git a/configs/boot/devtime.rcS b/configs/boot/devtime.rcS index 22a5469b8..4d1ca9407 100644 --- a/configs/boot/devtime.rcS +++ b/configs/boot/devtime.rcS @@ -1,7 +1,4 @@ -echo "switching cpus" -m5 switchcpu -echo "done" -insmod /modules/devtime.ko dataAddr=0x9000004 count=100 +insmod /modules/devtime.ko dataAddr=0x9000008 count=100 rmmod devtime insmod /modules/devtime.ko dataAddr=0x1a0000300 count=100 rmmod devtime diff --git a/src/dev/i8254xGBe.cc b/src/dev/i8254xGBe.cc index e0272c655..baf13c49a 100644 --- a/src/dev/i8254xGBe.cc +++ b/src/dev/i8254xGBe.cc @@ -656,7 +656,7 @@ IGbE::RxDescCache::writePacket(EthPacketPtr packet) return false; pktPtr = packet; - + pktDone = false; igbe->dmaWrite(igbe->platform->pciToDma(unusedCache.front()->buf), packet->length, &pktEvent, packet->data); return true; @@ -683,8 +683,12 @@ IGbE::RxDescCache::pktComplete() uint8_t status = RXDS_DD | RXDS_EOP; uint8_t err = 0; + IpPtr ip(pktPtr); + if (ip) { + DPRINTF(EthernetDesc, "Proccesing Ip packet with Id=%d\n", ip->id()); + if (igbe->regs.rxcsum.ipofld()) { DPRINTF(EthernetDesc, "Checking IP checksum\n"); status |= RXDS_IPCS; @@ -715,7 +719,10 @@ IGbE::RxDescCache::pktComplete() err |= RXDE_TCPE; } } - } // if ip + } else { // if ip + DPRINTF(EthernetSM, "Proccesing Non-Ip packet\n"); + } + desc->status = htole(status); desc->errors = htole(err); @@ -912,10 +919,20 @@ IGbE::TxDescCache::pktComplete() DPRINTF(EthernetDesc, "TxDescriptor data d1: %#llx d2: %#llx\n", desc->d1, desc->d2); + if (DTRACE(EthernetDesc)) { + IpPtr ip(pktPtr); + if (ip) + DPRINTF(EthernetDesc, "Proccesing Ip packet with Id=%d\n", + ip->id()); + else + DPRINTF(EthernetSM, "Proccesing Non-Ip packet\n"); + } + // Checksums are only ofloaded for new descriptor types if (TxdOp::isData(desc) && ( TxdOp::ixsm(desc) || TxdOp::txsm(desc)) ) { DPRINTF(EthernetDesc, "Calculating checksums for packet\n"); IpPtr ip(pktPtr); + if (TxdOp::ixsm(desc)) { ip->sum(0); ip->sum(cksum(ip)); @@ -1192,6 +1209,7 @@ IGbE::rxStateMachine() // If the packet is done check for interrupts/descriptors/etc if (rxDescCache.packetDone()) { + rxDmaPacket = false; DPRINTF(EthernetSM, "RXS: Packet completed DMA to memory\n"); int descLeft = rxDescCache.descLeft(); switch (regs.rctl.rdmts()) { @@ -1236,6 +1254,12 @@ IGbE::rxStateMachine() return; } + if (rxDmaPacket) { + DPRINTF(EthernetSM, "RXS: stopping ticking until packet DMA completes\n"); + rxTick = false; + return; + } + if (!rxDescCache.descUnused()) { DPRINTF(EthernetSM, "RXS: No descriptors available in cache, stopping ticking\n"); rxTick = false; @@ -1262,6 +1286,7 @@ IGbE::rxStateMachine() rxFifo.pop(); DPRINTF(EthernetSM, "RXS: stopping ticking until packet DMA completes\n"); rxTick = false; + rxDmaPacket = true; } void diff --git a/src/dev/i8254xGBe.hh b/src/dev/i8254xGBe.hh index 2dec3b08c..b6da53b09 100644 --- a/src/dev/i8254xGBe.hh +++ b/src/dev/i8254xGBe.hh @@ -80,6 +80,8 @@ class IGbE : public PciDev bool txTick; bool txFifoTick; + bool rxDmaPacket; + // Event and function to deal with RDTR timer expiring void rdtrProcess() { rxDescCache.writeback(0); -- cgit v1.2.3